JPH0756400A - Page turning device for book document - Google Patents

Abstract

PURPOSE:To provide a page turning device for book documents which previously detects a document failure state, surely turns the pages of the book documents by one sheet each without failure of the pages and has high reliability of page turning. CONSTITUTION:A page separating roller 250 is brought into pressurized contact with a friction member 224a of a page turning roller 224 in the state that the page turning belt 208 sucks and lifts the page of the uppermost position of the book documents BO. The rotation of the page separating roller 250 is stopped or this roller is rotated backward to separate the pages of the second and subsequent sheets from the page of the uppermost position if many sheets of the pages are inserted between the page turning belt 208 and the friction member 224a in this state. In addition, the presence or absence (position and timing sucked on the page turning belt 208 is previously detected by a page detecting sensor 290 of the page turning part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a page turning apparatus for book originals having an image reading function and a page turning function for book originals used as an original reading apparatus for copying machines and facsimiles.

[0002]

2. Description of the Related Art As a document reading device in a copying machine, a facsimile, etc., a sheet document is automatically conveyed to a document reading position to read document information, and the document which has been read is automatically discharged from the document reading position. An automatic document feeder (ADF) is known. As described above, when the document is a sheet document, the document information can be automatically read by mounting the ADF. However, when the document is a book document, an automatic page turning mechanism is realized. However, at present, the pages of the book manuscript can be turned only manually. On the other hand, conventionally, various proposals have been made on methods and means for automating the time-consuming reading of book manuscripts, but these conventional techniques have many proposals only for ideas, and have reached a level that can be realized. Not not.

In view of the above situation, the present application is directed to a page-turning belt formed of a belt-shaped member rotatably stretched along the document-placing surface of a document-placing table. The document surface of the book document that is opened and placed between is electrostatically attracted, and in this state, the page-turning scanning unit (hereinafter simply referred to as the scanning unit) provided with the page-turning belt is relatively moved. By moving
A page turning apparatus for book originals has been proposed which performs page turning of the book originals and scanning for reading the originals. According to the page turning apparatus for book originals according to this proposal, it is possible to completely automate the page turning operation and original reading scanning of book originals, which required a great deal of labor for copying work,
It is possible to realize a multi-functional original reading system that significantly improves productivity such as copying.

[0004]

By the way, the page turning apparatus for book originals previously proposed by the present applicant does not have the function of separating the book original pages attracted to the above-mentioned page turning belt. When pages of a book manuscript are attracted to each other by some action, a large number of pages may be turned at the same time, and the page turning reliability is lacking. Further, in the above-mentioned page turning device, depending on the position at which the uppermost page of the book original of the page turning belt of the page adsorbing means is adsorbed and lifted, the uppermost page does not enter the page storage guide and the original is damaged, There was a possibility that pages would not be attracted to the page-turning belt and page-turning would not be performed.

The present invention has been made in view of the above points, and the objects of the inventions of claims 1 to 3 are:
It is an object of the present invention to provide a highly reliable page turning apparatus for book originals, which detects the original damage state in advance and turns the pages of the book original one by one without damage. It is another object of the present invention to provide a highly reliable page turning apparatus for book originals, which detects a document damage state in advance and can perform recovery processing after detecting this state. is there.

Further, in the page turning apparatus for book originals proposed by the present applicant, the friction member (page separating roller) as the page separating means is brought into contact with and separated from the belt supporting member of the belt-like member (turning belt). The page adsorbed on the turning belt may be folded by any means. The invention according to claim 6 is made in view of this point, and an object thereof is always to make the timing of pressing the page separation roller against the belt support member irrespective of the position of lifting the adsorbed page. It is an object of the present invention to provide a highly reliable page turning apparatus for a book original, which can turn pages one by one with a certain positional relationship from the edge of a page.

A seventh aspect of the present invention is directed to page turning of a highly reliable book manuscript capable of performing recovery processing by detecting in advance a state in which no page is attracted to the page turning belt and no page turning is performed. To provide a device. It is another object of the present invention to provide a highly reliable page turning apparatus for book originals, which can more surely prevent the original breakage such as page folding by the page separating means coming into contact with and separating from the belt supporting member. To provide.

[0008]

The invention according to claim 1 is
In order to solve the above problems, a book including a document table on which a book document is placed, and an operation unit having a function of scanning and moving the book document opened and placed on the document table to turn pages In a page turning apparatus for a document, a plurality of belt-shaped members formed of dielectric sheets and arranged in parallel, and the belt-shaped members rotatably supported so as to form a flat surface on the lower surface of the belt-shaped members. Belt supporting means, belt driving means for rotating the belt-shaped member so that the lower surface of the belt-shaped member supported by the belt-supporting means moves in the same direction as the scanning direction of the book document, and the belt-shaped member. 1st position for bringing the lower surface flat portion of the belt-like member into contact with the uppermost page of the book document and adsorbing the uppermost page to the lower surface flat portion. And a belt-shaped member moving means for moving the belt-shaped member between the second position for accommodating the uppermost page adsorbed to the flat portion on the lower surface, the page adsorbing means for the book original is configured to have a cylindrical shape. A formed friction member and friction member moving means for urging the friction member so as to contact the belt supporting member of the belt supporting means at the second position and separating the friction member from the belt supporting member at the first position; When a large number of pages are inserted between the belt-shaped member and the friction member at the second position, the rotation of the friction member is stopped or reversely rotated with respect to the page conveying direction, so that one page is inserted. The page separating means for the book document is constituted by the friction member rotating means for rotating the friction member in the page conveying direction when only the page is inserted.

In order to solve the above-mentioned problems, the invention according to claim 2 is a page original of the book original, which is provided with the page suction means, the page separating means, and the page turning part page detecting means of the book original according to claim 1. In the apparatus, the page detection position of the page-turning-section page detecting means is a position behind the belt-shaped member on the downstream side in the page-turning scanning direction of the scanning unit.

In order to solve the above-mentioned problems, the invention according to claim 3 is a page original of the book original, which is provided with the page suction means, the page separating means, and the page turning part page detecting means of the book original according to the first aspect. In the apparatus, the belt-shaped member is displaced from the first position to the second position while the scanning unit is stopped, and within the subsequent stop time of the scanning unit, the turning-page page detecting means causes the belt-shaped member to move to the belt-shaped member. The configuration is such that the presence or absence of the adsorbed page is detected.

According to a fourth aspect of the present invention, in order to solve the above-mentioned problems, during the stop time of the scanning unit according to the third aspect, the pages attracted to the belt-like member by the page-turning-section page detecting means are detected. When it is detected, it is determined that the page turning is defective, and the page turning operation of the scanning unit is stopped.

According to a fifth aspect of the present invention, in order to solve the above-mentioned problems, after the page turning operation of the scanning unit is stopped after it is judged that the page turning is defective, the belt-shaped member is set to the above-mentioned state. Holding the second position, the scanning unit is moved in the direction opposite to the scanning direction, the page end of the page is detected by the page detecting unit, and the belt member is stopped to adsorb the page. The position where the above-mentioned page edge is detected is measured from this position, and re-scanning of page turning is performed using the measured distance.

In order to solve the above-mentioned problems, the invention as set forth in claim 6 is such that, during the stop time of the scanning unit according to claim 3, the pages attracted to the belt-shaped member by the page-turning-section page detecting means are If it is not detected, the page end is detected by the turning page detecting means while moving the scanning unit in the turning scanning direction, and when the page end is detected by the turning page detecting means, By using the detection timing of the page edge, the friction member of the page separating means according to claim 1 is urged into contact with the belt supporting member to perform page separation.

According to a seventh aspect of the invention, in order to solve the above-mentioned problems, during the stop time of the scanning unit according to the third aspect, the pages attracted to the belt-shaped member by the page-turning-page detecting means are detected. If it is not detected, the scanning unit is moved in the turning scanning direction, and while the scanning unit moves a predetermined length, the turning page detecting unit detects the page end, and the turning page is detected. When the edge of the page is not detected by the detecting means, it is determined that the page turning is defective, the page turning operation of the scanning unit is interrupted, the scanning unit is returned to the initial position of the page turning operation, and the same page turning operation is performed again. It is configured to perform.

In order to solve the above-mentioned problems, the invention according to claim 8 scans when the friction member of the page separating means is urged into contact with the belt support member at the timing of claim 6 to perform page separation. The moving distance of the unit is set to be less than the length of one page of the minimum document in the scanning direction, and the friction member biased and contacted by the belt supporting member is thereafter separated from the belt supporting unit.

According to a ninth aspect of the present invention, in order to solve the above-mentioned problems, the friction member of the page separating means according to the eighth aspect is urged into contact with the belt supporting member to perform the page separation. The turning scanning speed is set to be slower than the turning scanning speed of the scanning unit other than when the page is separated.

[0017]

According to the constitutions of claims 1 to 3 of the present invention, the friction member of the page separating means is operated with the turning belt formed of the belt-like member adsorbing and lifting the uppermost page of the book document. When a large number of pages are inserted between the belt-shaped member and the friction member under pressure contact with the supporting member of the turning belt, the rotation of the friction member stops or reverses, and the second sheet The following pages are separated from the uppermost page, and the presence or absence (position and timing) of the pages adsorbed on the above-mentioned turning belt is detected in advance.

According to the fourth and fifth aspects of the present invention, when the possibility of document damage is detected in advance,
The page-turning operation is interrupted, and while the scanning unit is moved in the direction opposite to the page-turning scanning direction, the page-edge portion is detected by the page-turning-section page detecting means, and the belt-shaped member is stopped to suck the page. The position where the above-mentioned page edge portion is detected is measured from the determined position, and the page turning is rescanned using the measured distance.

According to the configuration of claim 6 of the present invention, when the page adsorbed on the belt-shaped member is not detected by the page-turning-section page detecting means within the stop time of the scanning unit, While the scanning unit is moving in the turning scanning direction, the page end portion is detected by the turning page page detecting means, and when the page end portion is detected by the turning page page detecting means, the detection timing of the page end portion is used. The friction member of the page separating means is urged into contact with the belt supporting member to separate the pages.

According to the configuration of claim 7 of the present invention, when the page adsorbed on the belt-shaped member is not detected by the turning-page page detecting means within the stop time of the scanning unit, The scanning unit is moved in the turning scanning direction, and while the scanning unit moves a predetermined length, the page end portion is detected by the turning unit page detection means,
When the page end portion is not detected by the page-turning-section page detecting means, it is determined that the page-turning is defective, the page-turning operation of the scanning unit is interrupted, and the scanning unit is returned to the initial position of the page-turning operation and is again turned on. A similar page turning operation is performed.

According to the eighth aspect of the present invention, the movement distance of the scanning unit when the friction member of the page separating means is urged into contact with the belt supporting member at the above timing to perform the page separation. The length of the one page of the minimum document which does not cause page break becomes less than the length in the scanning direction, and thereafter the friction member urged and contacted with the belt supporting member is separated from the belt supporting means.

According to the ninth aspect of the present invention, the turning scanning speed of the scanning unit when the friction member of the page separating means is urged into contact with the belt supporting member to separate the pages is The speed is reduced to a speed at which a page break is less likely to occur, which is slower than the page-turning scanning speed of the scanning unit except when separating pages.

[0023]

Embodiments of the present invention will now be described in detail with reference to the drawings. However, in order to avoid complication, the description of the configuration, operation, and the like within the range that can be clearly recalled from the description of the present specification is omitted or simplified. The page turning apparatus for book originals of the present invention can be configured with independent units for the image reading function and the page turning function of the book original. Function and both functions 1
A device incorporated in one unit was used as an example. Further, in principle, this embodiment has substantially the same function as the page turning reading apparatus for book originals proposed by the present applicant.

The configuration and operation of the embodiment of the present invention will be described below. First, a page turning apparatus for book originals (hereinafter, referred to as TPS: Turn the Page Sc) according to the present embodiment.
anner. Data flow). Figure 1
2 shows a data processing block of an apparatus for copying and outputting a TPS original read image to an electrophotographic printer. This system is roughly divided into an image reading unit of TPS, an image data processing unit, and an image forming unit. The image reading unit located at the right end of the scanning carriage of the TPS is a CCD
(Charge imaging device) 101 is provided, and VPU (Video) is provided.
Processing Unit) 102 with CCD 10
1 drive signal generation, correction of the analog data output signal of the CCD 101 to digital signal conversion are performed. VPU
Reference numeral 102 synchronizes with a clock and a gate signal in the main scanning direction and the sub-scanning direction to read 8-bit image data for each dot at an IPU (Image Pro) speed of about 7.5 MHz.
Cessnig Unit (image processing apparatus) 103, and the IPU 103 performs processing such as zooming and high-quality processing of electrophotography. In the final processing of the IPU 103, gradation processing including γ correction is performed, and each dot 4 suitable for writing
Convert to bit video data. Then, the processed data is accumulated in the frame memory 104.

That is, in this TPS, the reading speed of the book original is 90 mm / sec. , Sheet original reading scanning speed 120 mm / sec. , Image forming speed 180mm
/ Sec. Since there is a difference between the reading scanning speed and the image forming speed, a frame memory for one page of A3 size is used for the speed buffer. Further, this frame memory is effective for protecting an original at the time of repeat copying, and it is possible to perform wide-range zooming by using it also in zooming in the sub-scanning direction. Further, the frame memory is used for continuous page scanning for printing left and right pages independently. That is, the frame memory 104 of 4 bits for each dot is arranged after the IPU processing according to the speed correspondence of the IPU 103, and the write data after the image processing is stored in the frame memory 104, so that the frame memory 104 for the read image data of 8 bits for each dot. Halves the memory capacity of. Frame memory capacity of TPS is 400DP
The image data of I is 128 Mbits for one page of A3 size, and is composed of a DRAM. Frame memory 1
Image data is input to 04 in parallel for 2 dots, and sequentially input at a speed of about 3.8 MHz.

On the other hand, the image data output from the frame memory 104 is also performed in parallel for two dots, and is synchronized with the clock sent from the IPU 103 at a speed of about 7.5 MHz and the gate signal in the main scanning and sub-scanning directions.
Output to U103 sequentially. In the IPU 103, the data output at high speed by the frame memory 104 at the image forming speed of the printer is combined with the serial data of about 15 MHz, and the FIFO (First In First Out) is combined.
Using t), the speed is further increased in the main scanning direction to about 18 MHz.
Synchronize with the write clock of. The 4-bit data for each dot is pulse-width modulated into light emission time data, and LD (L
and the PWM data is transmitted to the controller in synchronization with the write clock. The LD controller includes an LD driver, and causes the LD 105 to emit light to expose and scan the photoconductor to form an image.

The IPU 103 also controls scanning of the reading carriage (scanning unit), and scans the carriage at a scanning speed of 120 mm / sec. , Scanning speed of the carriage is 90mm / se when reading book originals
c. 180 mm / sec. At the time of return to return the carriage to the scanning start position. , 120 mm / sec when turning pages of a book manuscript. The scanner motor 106 composed of a stepping motor is driven at the speed of. The main control plate 107 shown in FIG. 1 performs sequence control of image formation by inputs of sensors related to image formation and outputs of motors, solenoids, clutches, and the like.

Next, the image read signal processing in this embodiment will be described. CCD 101 has approximately 5000 pixels, 4
00DPI can be read, and the reflected light for one line of the original in the main scanning direction can be read at the same time. The optical data stored in the CCD 101 is converted into an electric signal, waveform correction such as clamping, amplification, and A / D conversion are performed, and output to the IPU 103 as an 8-bit digital signal. The analog data output of the CCD 101 is EVEN. ODD
The output is divided into two systems, and is combined into a serial analog signal by a switching IC composed of analog switches. The image transfer rate of one pixel after the combination is about 7.5 MHz in the book document reading mode, and in synchronism with this, the A / D converter converts it to a digital signal of 8-bit 256 gradations. On the other hand, in the variable amplifier, in order to correct the light quantity variation of the exposure fluorescent lamp, the amplification degree is adjusted to an appropriate value according to the read data of the reference white plate.

The data processing of the reading scanner in the TPS is shown in FIG. In FIG. 2, analog data read out from the CCD 101 and continuous in the main scanning direction is subjected to adjustment of the base level of the waveform by clamping, and sample and hold of the data is performed in synchronization with the pixel clock. Next, an AGC (Auto Gai) that changes the amplification factor of the data according to the read exposure light amount and the data level thereof.
n Control) processing is performed. Then, the A / D converter converts the analog data into 8-bit digital data. The read data that is linear with respect to the document reflection density read by the CCD 101 is subjected to logarithmic conversion so that gradations can be handled efficiently in accordance with the luminosity. Logarithmic conversion is performed by an input / output 8-bit / dot LUT (LOOK UP TA
BLE).

The digital signal for each pixel indicating the image density is input to the IPU 103 and subjected to image processing. IPU
103 is composed of a plurality of LSIs, and in addition to image processing,
Controls high-quality processing. The main functions will be described below. 1. Shading Correction The scanner of the present embodiment uses a linear light source of a fluorescent lamp, and since the light is condensed by a lens, the light amount becomes maximum at the central portion of the CCD 101 and decreases at the end portions. Also,
The CCD 101 has variations in the sensitivity of each element.
Therefore, the IPU 103 corrects the read data by shading-correcting both of the reference white-board read data for each pixel.

2. MTF correction In an optical system using a lens or the like, peripheral pixel information is affected by the performance of the lens or the like, and the reading output by the CCD 101 is read as blunt. So IPU
In 103, when one pixel data is obtained, it is corrected by the peripheral pixel level to obtain a highly reproducible image.

3. Main scanning direction magnification change In this device, the image reading and writing resolutions are the same 400 DPI, but since the read memory frame memory read pixel frequency differs by about 15 MHz and the write pixel frequency differs by about 18 MHz, frequency conversion is performed. ing. Further, the scaling in the main scanning direction and the sub scanning direction is performed from 50% to 200%. This scaling is calculated by calculating the peripheral pixel data.

4. The density reproduction characteristic (γ characteristic of the printer) of the laser printer using the γ-correction electrophotographic method is not linear, and the original document density cannot be faithfully reproduced with the data as it is. Therefore, in this apparatus, the conversion is carried out using the conversion table so as to adjust the writing exposure light amount according to the printing characteristics. Also, it is realized by changing this value during manual density adjustment.

In addition, the IPU 103 also performs image conversion such as masking, trimming, mirroring, black-and-white inversion, document size, position and density detection, and marker detection.

The image data sent from the IPU 103 is converted into light energy by the LD 105. The optical writing method of the printer unit in this apparatus uses a method in which a laser beam is deflected and scanned by a polygon mirror and is exposed on a photoconductor to form an electrostatic latent image. Also, L
The modulation method of D105 mainly includes a pulse modulation method that modulates the exposure time within one dot and a power modulation method that modulates the exposure intensity. The former method is used in this apparatus. As a result, high image quality with resolution and gradation can be obtained.

Next, the TPS book document exposure method will be described. 3 and 4 show a fluorescent lamp dimming circuit of this device. This apparatus is provided with two fluorescent lamps 201 and 202 as a light source for exposing a book original and two fluorescent lamps 203 and 204 as a light source for exposing a sheet original, and each fluorescent lamp is the same. Equipped with a dimming circuit. In other words, this device has a total of four fluorescent lamps and four independently controllable lamps.
Equipped with two fluorescent lamp dimming circuits. Here, the two fluorescent lamps 201 and 202 as the light source for exposing the book original are
As shown in FIG. 34, the scanning unit (carriage) 20
The platen glasses 205 are arranged at both upper ends of the platen glass 205 arranged at the book document reading slit position in the direction orthogonal to the 0 scanning direction. These fluorescent lights 201,2
02 exposes the book document BO from both the left and right sides through the platen glass 205, and when reading the book document BO, density unevenness due to left and right pages and book document binding portion BO
The shadow of a is eliminated.

On the other hand, 2 as a light source for exposing a sheet original
As shown in FIG. 34, which will be described later, the book fluorescent lamps 203 and 204 are arranged at sheet document reading slit positions in a direction orthogonal to the scanning direction on the upper part of the scanning unit 200, respectively. Exposes the sheet original SO set on the contact glass 206 by the scale 207 from both the left and right sides through the contact glass 206 on the upper surface of the apparatus to obtain the book original BO.
Similarly to the above, the density unevenness and the shadow when reading the sheet document SO are eliminated.

The fluorescent lamp dimming circuit of the book document BO shown in FIGS. 3 and 4 comprises fluorescent lamps 201 and 202, light quantity sensors 201a and 202a for detecting the quantity of emitted light, and dimming circuits 201b and 202b. Has been done. The light amount sensors 201a and 202a are composed of photodiodes, and are arranged at the substantially central portions in the reading and scanning direction on the back side of the fluorescent lamps 201 and 202 in the original exposure direction. These light amount sensors 201a and 202a respectively monitor the respective fluorescent lamp light amounts that change depending on the temperature, and perform feedback back control so that each fluorescent lamp light amount becomes a constant appropriate exposure value. The light control circuits 201b and 202b average the light amount signals of the respective fluorescent lamps detected by the light amount sensors 201a and 202a by the integrating circuits 201c and 202c, and amplify these signals by the amplifying circuits 201d and 202d. The difference between the target exposure light amount of each fluorescent lamp is increased or decreased, and each fluorescent lamp 201, 202 is driven by each lighting circuit 201e, 202e.

In this fluorescent lamp driving system, the CCD 101
A rippleless dimming method is used in which the amplitude of the drive current is changed to adjust the light amount so as to avoid uneven reading density in synchronization with the reading sampling. Here, the driving frequency of the fluorescent lamps 101 and 102 is 40 kHz, and the dimming frequency is approximately 1 kHz. The target exposure light amount is set by converting a setting signal from 0 to 255 from a microcomputer into an analog value by a D / A converter according to the mode, and by adjusting the remote voltage terminals of the respective dimming circuits 201b and 202b. The remote voltages V1 and V2 are input at analog level. To start the lighting of these fluorescent lamps, the lighting signals S1 and S2 are turned on at the exposure scanning start timing from the microcomputer which also performs the sequence control of the scanner section, and turned off at the end of the scanning. As described above, since the present device is provided with the independent light control circuit for each fluorescent lamp, the lighting signal S1,
It is possible to turn off each fluorescent lamp independently and change the light amount by S2 and the remote voltage signal.

By the way, the scanning speed of the scanning unit 200 at the time of reading the sheet original is 120 mm / sec. , The scanning speed of the scanning unit 200 when reading a book document is 9
0 mm / sec. Therefore, the accumulated charge of the CCD 101 is determined by the product of the received light power and the accumulation time. Therefore,
The light control circuits 201b and 202b correct the difference in the light accumulation time due to the difference in the reading linear velocity. That is, in contrast to the exposure setting value P when reading a book original, scanning is performed at an exposure setting value of 1.33P when reading a sheet original, and the sheet original and the book original are treated as equivalent density data. Furthermore,
If the amplification circuit for reading image data shown in FIG. 10 described later is used and the amplification gain is set to 1.33 times when reading a sheet document, the same gain is set when reading a sheet document. The light effect is obtained.

5 to 9 show examples of the set exposure light amount using the above fluorescent lamp driving system. FIG. 5 shows a book manuscript BO.
This is an example in which both fluorescent lamps 101 and 102 are exposed with the set values kept constant from the start of the reading scan. Figure 6
Is an example of operating the remote voltage signal to increase the exposure light amount of the fluorescent lamp at the binding portion BOa of the book document BO. This increase in the exposure light amount of the fluorescent lamp is performed by changing the remote voltage signal according to the scan control position from the scan start position of the scan unit 200.

Specifically, in the example shown in FIG. 6, the scanning address of the scanning unit 200 is 230 m from the 210 mm point.
The remote voltage signal is gradually increased to the point m to gradually increase the exposure light amount of the fluorescent lamp, and the remote voltage signal is gradually decreased from the scanning address 250 mm point of the scanning unit 200 to the 270 mm point to reduce the fluorescent lamp exposure light amount. Gradually reduce and restore. Alternatively, the binding portion BOa of the book document BO that is displaced to the left or right due to page turning is calculated based on the book document edge detection result, which will be described later, and the light amount control is similarly performed. As a result, the density increase (insufficient light amount) due to the shadows generated at the binding portion of the book document is improved.

Further, depending on the thickness of the book original placed, as shown by the broken line in FIG. 6, by increasing the exposure light amount value at the time of scanning, underexposure caused by the bending of the binding portion BOa and reading It is possible to correct uneven density due to the focusing lens. This correction is performed by detecting the opening / closing amount of a pair of slide plates (that is, the thickness of the book document binding portion) for mounting the book document binding portion of the book document table, which will be described later, with a sensor (not shown), and as shown in FIG. , The amount of each fluorescent lamp light is increased at the book document binding portion in accordance with the thickness of the book document.

FIG. 8 shows an example in which the exposure light amount of two fluorescent lamps is increased asymmetrically to correct the density increase of the binding portion BOa of the book document BO. In FIG. 8, the solid line indicates the light amount setting value of the right fluorescent lamp, and the broken line indicates the light amount setting value of the left fluorescent lamp. In this example, the reading unit of the scanning unit 200 approaches the binding portion BOa of the book document BO, and the light amount setting value of the fluorescent lamp on the right side is increased as shown by the solid line from the position where the surface of the reading document is tilted to the right, and the fluorescent lamp is turned on. The exposure light amount from the right direction perpendicular to the original surface is increased to facilitate exposure, and the background density of the binding portion is adjusted to be the same as the background density of the original page portion.

Next, when the reading unit reaches the center of the book document binding unit, the light amount setting value of the fluorescent lamp on the right side is returned to the original value. This time, the reading document surface is tilted to the left, contrary to the above. Increase the light amount setting value of the fluorescent lamp on the left side of the position as shown by the broken line, and increase the exposure light amount from the left side perpendicular to the document surface so that the fluorescent lamp is easy to expose. Adjust so that the background density of the page is the same. Then, when the reading section reaches the end of the right-side curved section of the book document binding section, the light quantity setting value of the left fluorescent lamp is returned to the original value, and then the light quantity of both fluorescent lamps is made constant. Keep it up.

FIG. 9 shows the transition of the light quantity setting value of each fluorescent lamp when the exposure light quantity of each fluorescent lamp is gradually changed in the scanning direction. FIG. 7 is an enlarged view of the exposure light amount when the exposure light amount is independently increased. In this way, by gradually changing the exposure light amount of each fluorescent lamp, the bending of the book document binding portion
It is possible to correct the density in accordance with the inclination, and it is possible to prevent the occurrence of band-shaped unevenness due to the density jump in the sub-scanning direction due to the change in the exposure light amount at the binding portion. Further, as in this example, the step of changing the exposure light amount of each fluorescent lamp is set to 256 steps and the light amount of each fluorescent lamp is gradually changed. The same effect can be obtained when the number is increased in the left and right sides of the book document binding portion.

Next, a method of correcting density unevenness using a data amplification circuit for TPS read image data will be described. FIG. 10 shows an amplifier circuit for read image data. In this data amplifier circuit, as shown in FIG.
The accumulated charges of the CD 101 are transferred and output in the main scanning direction, and the analog signal subjected to waveform correction such as clamp, sample hold, and EVEN / ODD pixel combination is amplified by a variable amplification circuit. The amplified signal is A / D converted and transferred to the IPU 103 as digital data.

The data amplifier circuit shown in FIG. 10 is composed of a non-inverting amplifier circuit, inputs an image analog signal into VIN of an amplifier 301, and outputs an amplified signal amplified by this amplifier 301 from VOUT. In FIG. 10, G1 to G
5 is a 5-bit signal input for setting the data amplification value,
Usually, an image is read by setting an appropriate gain calculated by shading correction. The amplification factor of the non-inverting amplifier circuit of FIG. 10 is determined by the resistance value R composed of the resistance R1 and the parallel resistance of R2 to R7, and is represented by the following expression VOUT = VIN (1 + R / R1).

Therefore, in this data amplifier circuit, it is possible to select a magnification in 32 steps from approximately 6 to 450 times depending on the set values of the input signals G1 to G5. Therefore, in the embodiment of the present invention, by adjusting the image data amplification gain, it is possible to prevent the occurrence of density unevenness due to the bending or shading of the book document binding portion. Specifically, depending on the scanning control position from the scanning start position of the scanning unit 200,
The amplification gain of the input image data is added. That is, in this embodiment, when the image reading position approaches the book document binding portion, the image data is shifted to the light side to operate so as to keep the document background density constant.

In the data correction of this method, similarly to the variable example of the exposure light amount shown in FIG. 6, the amplification set value is manipulated to increase the read image data at the book document binding portion and reduce the image density. It is a thing. This correction is changed depending on the scan control position from the scan start position of the scan unit 200, and specifically, the scan address 2 of the scan unit 200.
From the 10 mm point to the 230 mm point, the data amplification value of the read image data is gradually increased, and the scanning unit 2
The scan data amplification value of the read image data is gradually reduced to the original value from the scanning address 250 mm point of 00 to the 270 mm point.

As a result, the density increase due to the shadow generated at the binding portion of the book original is improved. Further, by increasing the data amplification value depending on the thickness of the book original placed, it is possible to correct the underexposure caused by the bending of the binding portion BOa and the uneven density due to the reading focus lens.
This correction is performed by detecting the opening / closing amount of the pair of slide plates for placing the book document binding portion (that is, the thickness of the book document binding portion) by a sensor (not shown), and similarly to the case shown in FIG.
This is performed by increasing the data amplification value at the book document binding portion according to the thickness of the book document. Further, by gradually changing the data amplification value of the read image data with respect to the scanning direction, it becomes possible to correct the density of the bending of the book document binding portion in accordance with the inclination thereof, and the exposure at this binding portion is possible. It is possible to prevent the occurrence of band-shaped unevenness due to the density jump in the sub-scanning direction due to the change in the light amount. Here, in this embodiment,
Although the method of correcting by changing the amplification value of the read analog data has been shown, the same processing may be performed by shift or multiplication by subtraction on the A / D converted digital data.

By the way, the bending and shading of the book document binding portion generally have a characteristic of occurring at the same position in the main scanning direction. Therefore, in the embodiment of the present invention, in order to improve the density unevenness due to the book document binding portion, the image data in the main scanning direction is sampled, and the line in the main scanning direction is determined by the lowest density value which is the background portion of the book document. The image data may be corrected in real time. This correction method is
By the peak value of the image data of the front line in the main scanning direction,
The amplification gain of the amplifier circuit shown in FIG. 10 is determined. Alternatively, the FIFO memory delays the image data for one line, calculates the peak of the lowest density value which is the background portion of the book original of the sampled image data in the main scanning direction, and shifts the digital data based on the value. The multiplication is performed so that the background density near the binding section becomes equal to the background density at the page section. Here, since the background density in the page of the book manuscript is generally constant, the image density correction amount of the page part in this method is small, and the side effect caused by using the minimum density value of the background part of the book manuscript as a reference value. Is extremely small.

In general, the left page portion of a spread book document such as a publication is increased by the page turning operation, and the left end portion of the book document moves upward and rightward with reference to the book cover position. On the other hand, the right page of the book manuscript is
By the page-turning operation, the number of pages is reduced, and the right end of the book document moves downward and rightward. like this,
11 to 13 show transition examples of the left end portion of the book document with respect to the number of repeated page turning.

In FIGS. 11 to 13, the amount of movement of the left end of the book document to the right is increased by the page turning operation with the position of the left end of the book spread placed initially being "0". Is represented by the amount of displacement. Also,
In FIGS. 11 to 13, the displacement amount of the left end of the book document to the right is set as a positive value, and the displacement amount is displayed in millimeter units. Here, FIG. 11 shows that the book thickness is 20 mm and the total number of pages is 75.
0 pages, FIG. 12 shows a book thickness of 12 mm, total number of pages 300 pages,
In FIG. 13, the thickness of the book is 9 mm, the total number of pages is 180, and the size of the book is a spread B4 size.

As is apparent from FIGS. 11 to 13, the left end portion of these book originals is displaced to the right by the page turning, but the shape of the central binding portion is changed by this displacement, so that the left end portion of the book original is displaced. Volume does not necessarily increase monotonically. Further, since the central binding portion of the book original slides in the left-right direction due to the page turning, there is also a point where it decreases conversely in the page turning process as shown in FIGS. 12 and 13, and the thin book shown in FIG. As for the manuscript,
It is also displaced to the left (minus direction). Further, these displacement amounts are also influenced by the size and thickness of the book original, the paper quality, and the like.

Therefore, in the present embodiment, an effective image range (page surface of a book that has been opened) suitable for capturing an image or printing is obtained regardless of such displacement of the end portion of the book document. For the reading sensor (CCD10
Based on the image reading information of 1), the position of the end of the opened page of this book document is detected, and the image effective range of the book document is obtained with this book document end position as a reference. When the spread size is A3, the edge portion (cover edge portion) of the book original detected by this embodiment is approximately 210 mm from the center set position at the reading position, and from the home position of the scanning unit (page turning reading unit) 200. The position is approximately 30 mm.

The edge of the book document in this embodiment is detected by the change of the read information in the sub-scanning direction by the specific pixel of the reading sensor. The read data of the reading sensor is as shown in FIG. 14 at the edge portion of the book document. Here, at the left end of the book document, the read document surface is located at the end of the image forming point of the sensor, so that the image is out of focus and becomes a slightly blurred image. Further, when the reading position has not reached the original, the original table or the back cover portion is read, and the level becomes the same as that of the black image.

When the sensor reading position reaches the end of the book document, a striped pattern portion due to the edge group of the document page is detected. In general, most books have a white background.
There are no characters or images in the area that is more than ten millimeters from the end of the book document. Therefore, when this uniform color (white) continues, it is determined to be the end of the book document. The edge detection of this book document is
At the end of the page turning scanning, detection is performed in the direction opposite to the image reading direction. As described above, by detecting the document surface based on the output information of the reading sensor, it is possible to obtain an image effective range suitable for image capturing and printing regardless of the displacement of the end of the book document.

Generally, as shown in FIG. 15, an edge portion of a double-spread book original BO is formed by stacking edge groups of original pages in an inclined manner, and the original page of the original page is illuminated by illumination from a direction opposite to the inclination of the edge portion. The image is read with the edges shaded and the striped pattern of the edges of the original page emphasized. In this apparatus, when reading a book original, the left and right pages are uniformly read, and in order to read the curved portion of the binding portion of the book original, exposure illumination is performed by a pair of fluorescent lamps from the left and right of the original surface.

Therefore, in the present embodiment, at the time of detecting the end of the book document, one of the fluorescent lamps is turned off or dimmed to emphasize the striped pattern by the edge group of the document page at the end of the book document, To improve the accuracy of edge position detection. That is, in the latter half of the page turning scanning from right to left of the scanning unit 200, the lighting signal S2 and the remote voltage V2 of the fluorescent lamp dimming circuit in FIG. 3 are operated to light only the right fluorescent lamp 202. Further, in detecting the right page edge of the double-page spread original for sucking the right page for turning the page, the lighting signal S2 of the fluorescent lamp dimming circuit of FIG.
And the remote voltage V2 are operated to turn off only the right fluorescent lamp 202 and read.

By the way, in the method of detecting the end portion of the book original by the edge group of the book original as described above,
If there is an image similar to a striped pattern due to the edge group of the page in the read page of the book document, the edge of the book document may be erroneously detected. Therefore, as a second method for detecting the edge of the book original, the book original is compared by comparing an image of the pair of fluorescent lamps with exposure illumination from both sides with an image of one of the fluorescent lamps with exposure illumination from one side. Improve the detection accuracy of the edges.

That is, in this method, one of the fluorescent lamps is turned off or dimmed at the time of detecting the end of the book document,
The first mode for emphasizing and reading the striped pattern by the edge group of the page at the end of the book document and the first mode for emphasizing and reading the striped pattern by the edge group of the page at the end of the book document by exposure illumination. The mode is switched between the two modes, the image read data in the first mode is compared with the image read data in the second mode, and the read data in the case where a difference occurs between the image read data of the two is set as the detection data of the end portion of the book document. . On the other hand, the first
When the difference between the image read data of both modes is compared with the image read data of the second mode, it is judged that this read data is the read data of the image formed on the plane, and the book reading data is read. Recognized as read data of the image printed on the original page.

Specifically, in the latter half of the page turning scanning from the scanning unit 200 right to left, the lighting signals S1 and S2 and the remote voltages V1 and V2 of the fluorescent lamp dimming circuit of FIG. 3 are operated,
Switch the lighting of the fluorescent lamp. The lighting switching timing of the fluorescent lamp may be performed for each main scanning line or may be scanned twice and stored in memory for comparison. Further, the second method may be carried out for confirmation only when the detection result of the end portion of the book document is doubtful. As described above, according to the second method, it is possible to further improve the accuracy of detecting the position of the end portion of the book document.

The copy operation timings in the book original mode of this apparatus are shown in FIGS. Here, the numbers in these figures represent the read page numbers of the book originals, and pages 2 and 3, 4 and 5 form the spread pages of the original. The symbols R and L of the read signal memory R of the frame memory 104 represent the right page (R) and the left page (L) of the read image data, respectively. Furthermore, the page size of the book manuscript in each mode is A4 size,
Two page spreads of the book document are continuously read by one scan of the scanning unit 200, and the frame memory 104 is read.
The read data for the A3 size is stored therein, and the stored data is read from the frame memory 104 according to each output mode to form an image on the photoconductor and record it on the transfer sheet.

FIG. 16 shows a 1 to 1 copy mode in which an image in a spread state is output on an A3 size transfer sheet and a copy of a book original is copied. FIG. 17 shows a 1 to 1 copy mode in which images on the left and right pages are read on A4 size transfer paper and are output on separate transfer papers for each independent page, and a copy of a book original is also copied. 18 is the same as FIG.
In the same manner as the above, the two-sheet copy mode is a mode in which two pages are copied to a book original with an independent page output and the number of copies set is two.

When the print key for instructing the start of copying is turned on at the operation timing of the book document mode in FIG. 16, the scanner motor 10 for scanning the scanning unit 200.
6 is driven in the reverse direction, and the scanning unit 200 located at the center is moved in the reading start direction. While the scanning unit 200 is moving, the right fluorescent lamp 202 is turned on, the reading sensor (CCD 101) is driven,
As described above, the edge of the book document is detected while scanning the edge of the left page of the spread book document.

Then, when the scanning unit 200 moves to the reading start position about 30 mm from the left page end of the double-page spread original, the scanner motor 106 is driven in the normal direction to turn both fluorescent lamps 201 and 2012 on. Turn on the light and start reading scanning. The read data by this scanning is processed as a document image from the left page end point of the spread book document detected as described above, and an effective image area signal SFGATE in the reading sub-scanning direction is generated.

Then, the data write signal memory W of the frame memory 104 is operated by this area signal to control the data write range. Also, the scanner motor 1
The center point of the double-page spread document binding portion is recognized from the control address of 06, and this is used as the reference position of the second image in the independent page output mode, or the read image is formed in the center of the transfer paper in the double-page output mode. Used when doing so. Then, when the scanning unit 200 reaches the right page edge of the double-spread book document, the right fluorescent lamp 202 is turned off and read as described above, the right page edge of the book document is detected, and the next page is detected. Calculate the page suction position when turning.

When the reading scan is performed as described above, the backward page-turning scan is started and image formation is started. As a result, the effective image area signal PF in the sub-scanning direction on the printer side is obtained.
The GATE operates the data read signal memory R of the frame memory 104 to output data as an image in synchronization with the operation of the printer. Further, when the page is turned, the position of the end of the book document is detected while scanning the end of the left page of the spread book document. By repeating the above steps, the double-page spread of the book original is copied while automatically turning the pages of the book original.

FIG. 17 shows a 1 to 1 copy mode in which read data is output for each independent page. In the read mode, FIG.
It operates at the same timing as 6 and outputs two pages of PFG according to the transfer paper that is continuously conveyed when turning pages.
The data read signal memory R of the frame memory 104 is operated by the ATE to output the data of each page as an image. Here, for the image data of the right page of the book document, the address counter of the frame memory 104 is masked by PFGATE and stopped, so that the image data linked to the first image of the left page is transferred by the second PFGATE signal. Read at intervals.

FIG. 18 shows an independent page two-sheet copying mode as in FIG. 17, and operates in the same timing as in FIG. 16 in the reading mode. Image output at the time of page turning is continuously transferred. The data read signal memory R of the frame memory 104 is operated by a plurality of PFGATEs according to the paper to output a plurality of pages of data as an image. In this example, first, two images of the read left page are output, and then two images of the read right page are continuously output. Here, the scanning unit 200 finishes page-turning scanning while the printer unit is outputting an image, stops at the reading-scanning start position, and stands by for the next reading-scanning. .

FIGS. 19 and 20 are for copying an image having the same structure as the front and back sides of a page of a book original on both sides of the transfer paper at the operation timing of the book original double-sided mode. FIG. 19
Is a mode in which copying is performed in the order of read pages by a conventional method. In this mode, the right page data of the two-page spread original is read from the frame memory 104 and formed on the surface of the transfer sheet, and then the transfer sheet is inverted and conveyed to the double-side stack position via the double-sided conveyance path. To do.
On the other hand, in the TPS, page turning is performed once by scanning in the left direction, the next double-page spread is read, and this read data is stored in the frame memory 104. Then, the transfer paper after the double-sided conveyance is re-fed, the left page data of the spread book document is read from the frame memory 104, and this data is formed on the back surface of the transfer paper and discharged. In the conventional method shown in FIG. 19, it takes time to re-feed the transfer paper due to the reversal and the conveyance path for image formation on both sides of the transfer paper, and the productivity of double-sided copying is lowered.

FIG. 20 shows a 1 to 1 high-speed double-sided mode according to the present invention, which is made in view of the above-mentioned problems and is characterized in that the frame memory 104 is used to form an image in a different reading page order. . In this method, the first
Then, the image on the right side of the two-page spread is formed on the surface of the first transfer sheet and is conveyed on both sides. Second, pages 2 and 3 of the spread are stored in the reading frame 104. Thirdly, the image data of page 3 is first read from the frame memory 104, an image is formed on the surface of the second transfer paper, and both surfaces are conveyed. Fourthly, the first transfer paper at the double-sided stack position is re-fed, the image data of two pages is read from the frame memory 104, this data is formed on the back surface of the first transfer paper, and is discharged.

By sequentially outputting the pages in the reverse order of the read spread pages, double-sided copying of the book original is performed at high speed. That is, although the double-sided conveyance required time required for re-feeding the transfer paper due to the reversing and the conveyance path for image formation on both sides of the transfer paper is the same between FIG. 19 and FIG. In the method, since the image formation on the next second transfer paper is performed during the double-sided conveyance period of the first transfer paper, the waiting time for the re-feeding of the transfer paper is eliminated. Continuous copying is possible, and the copying productivity about 1.5 to 2 times that of the conventional method can be obtained.

FIG. 21 shows an electrical block diagram of the TPS according to the present invention. In FIG. 21, the TPS control board 110
Is a one-chip CPU, external ROM, RAM, I / O,
It consists of a timer and a serial interface.
It controls the entire PS. This TPS control board 1
Reference numeral 10 is connected to the operation display control unit 111 and the printer unit 112 by a serial interface, and commands and data are exchanged between them. The reading unit drive driver 113 drives the scanner motor 106 of the scanning unit 200 in the forward and reverse directions to scan the document.

Prior to this document scanning, the home position of the scanning unit 200 is detected by the two sensors, the central HP sensor 114 and the end HP sensor 115. Here, when the book document is read, the detection position of the central HP sensor 114 is the start position of the scanning unit 200. As shown in FIG. 34, the scanning unit 20
Within 0, there is a turning belt 208 for turning pages of the book original BO by electrostatic attraction, and the book original page is turned by forming a charge pattern on the turning belt 208 by the high-voltage power supply 116. 20
8 is electrostatically adsorbed on.

When the original pages electrostatically attracted to the turning belt 208 are turned over, the turning belt upper and lower solenoid 117 swings the turning belt 208 upward so that the attracted page ends are scanned by the scanning unit 200. It is done by lifting alligators. At this time, the page turning sensor 118 detects whether or not the original page is turned. When the page-turning sensor 118 does not detect the page-turning sensor at a predetermined timing during the page-turning, the page-turning scanning is performed again.

The mirror switching solenoid 119 is a solenoid for switching between the lower reading optical path for book originals and the general upper reading optical path for sheet originals, and the optical path is switched by using a keep solenoid. The solenoid is energized only when.

As the light source for illuminating the original, as described above, the two fluorescent lamps 201, 202 and 203, 204 provided in the upper and lower reading portions of the scanning unit 200, respectively.
Are used respectively. Each fluorescent lamp 201, 202,
203 and 204 include light amount sensors 201a, 202a,
203a and 204a are attached respectively, and the light quantity of each fluorescent lamp is controlled to a constant light quantity by feedback through the fluorescent lamp driver. Also,
Each of the fluorescent lamps 201, 202, 203, 204 is provided with a heater 201f, 202f, 203f, 204f and a thermistor 201g, 202g, 203g, 204g, respectively, and the temperature of each fluorescent lamp is controlled by these heaters and thermistors. Control is taking place. In this electrical block, four fluorescent lamps are used as one fluorescent lamp driver 12
The fluorescent lamp driver 120 is provided with a circuit for switching the connection of the upper and lower fluorescent lamps in response to a switching signal from the TPS control board 110. There is.

The original image passes through the mirror and the lens by the illumination of each fluorescent lamp and is connected to the VPU 102 by the CC.
An image is formed on D101 (details will be described later). VPU102
Generates a clock for driving the CCD 101, and the CCD
The analog image signal output from 101 is converted into a digital value by the A / D converter, and the frame memory 1
04 and the IPU 103 to send an image signal to the printer unit 112.
Output to. Here, the frame memory 104 is a TPS.
It is used as a buffer for the reading linear velocity of the image and the process linear velocity of the printer unit 112. Further, the IPU 103 performs image processing of image data.

The configuration of the document table unit in the TPS of the present invention will be described below. The document table 1 of the embodiment shown in FIGS. 22 to 24 is formed of a resin plate having a thickness of 2 mm, and a material having a high friction coefficient such as extremely thin rubber is attached to the upper surface of the plate. There is. The high friction coefficient material may be formed on the upper surface of the document table 1 by laminating, coating, spraying, or the like. The document table 1 in this embodiment has a document placement surface (upper surface) of size A.
It is formed in 4 sizes, and on the left and right of the center 2 of the device body,
One is provided for each. A slide plate 3 is fixed under each document table 1. Each slide plate 3 is made of sheet metal whose front and rear sides and outer side surfaces are bent downward, and adjusting studs 4 are fixed near the device body center 2 on the front and rear side surfaces, respectively. . Each adjusting stud 4 has a hole at the end for fitting a slider pin described later.

On the other hand, the lower surface of the slide plate 3 is in contact with the upper surface of the upper and lower bases 5 having a low friction coefficient. Here, a rib of resin such as Teflon is formed on the upper surface of the upper and lower base 5,
It can move to the left and right smoothly with the slide plate 3. Further, the slide plate 3 and the upper and lower base 5 are relatively fixed by a size stopper 27 described later. On the lower side of the upper and lower pedestal 5, angles 7a and 7b with long holes in the left and right direction are provided at four front, rear, left and right positions. To the base 6 of this document table unit, another angle 8 having a fixed rotation axis and yet another angle 9 having a left-right elongated hole are fixed. Here, the link plate 10 is attached to the angles 8 and 7b, and the link arm 1 is attached to the angles 9 and 7a.
1 is rotatably supported, and the link plate 10 and the link arm 11 are slidable in the left-right direction with respect to the angles 7a, 7a, 9 respectively.

Further, when viewed from the entire surface of the document table unit, the two arm plates 10 and the link arms 11 on the front and rear sides are respectively provided with X
The studs 12 rotatably support each other at the intersections of the character shape. Further, a torsion spring 13 is hung between the link plate 10 and the link arm 11 with the stud 12 as a torsion center, and the torsion spring 13 exerts a force for constantly pushing the upper and lower bases 5 upward in FIG. is working. The lift of the upper and lower pedestal 5 due to this lifting force is
The scanning unit 2 whose vertical movement is restricted as described later
00, the document surface of the book document set on the document table unit is brought into contact with the document table unit, and is regulated. As a result, the pressure applied to the scanner unit 30 is maintained substantially constant regardless of the difference in the thickness of the book document.

The ends of the upper and lower pedestals 5 on the left and right sides of the apparatus main body 2 are connected to each other by a back support plate 14. The back support plate 14 is made of an elastically deformable material such as rubber, and the back cover of the book document BO is set on the back support plate 14. Also, the back support plate 14 is
Tension is constantly applied in the left-right direction by the action of a tension spring 17 described later. That is, the upper and lower pedestals 5 are provided with hooks 15, and the hooks 15 and the angles 16 of the link plate 10 are connected by the tension springs 17, so that the pair of left and right upper and lower pedestals 5 are pulled apart from each other. ing. Thereby, the back support plate 14
The tension is constantly applied to the back cover of the book manuscript without sagging.

On both sides of the base 6, side plates 1 made of sheet metal are provided.
8 is fixed, and each side plate 18 has a fixing pin 19 on which an opening / closing lock claw 32 of a scanner unit 30 described later is hooked.
Is attached. A leaf spring 21 for pushing the scanner unit 30 upward when the scanner unit 30 is closed and an open / close lock sensor 20 for detecting the closed state of the scanner unit 30 are attached to one side plate 18. There is.

Next, the size stopper 27 will be described. The size stopper 27 adjusts the distance between the left and right manuscript tables 1 according to the thickness of the book manuscript to be placed, and fixes the slide plate 3 (manuscript table 1) and the upper and lower tables 5 relatively to each other. This is a device for allowing the table 1 and the upper and lower table 5 to move integrally with each other. 25 and 26 show schematic configuration diagrams of this apparatus. As shown in FIG. 23, a pair of angles 22 are attached to the lower side of the upper and lower pedestal 5 at predetermined intervals. As shown in FIG. 25, rods 23 are laterally mounted and fixed to these angles 22. A sliding body 24 is mounted on the rod 23 so that it can slide smoothly in the longitudinal direction of the rod 23 through its through hole. A short shaft 26 is planted in the sliding body 24 so as to be orthogonal to the rod 23.
A stopper 25 is rotatably supported on the. Here, the stopper 25 is extended so that the locking hole 25a formed at one end thereof is loosely fitted to the rod 23 and the other end thereof can be grasped by a finger.

The sliding body 24 is fixed at an arbitrary position on the rod 23 by the stopper 25 inclining with respect to the rod 23 and the rod 23 and the locking hole 25a of the stopper 25 meshing with each other. That is, in the sliding body 24, the stopper 25 is normally tilted by the locking spring 28,
Although the rod 23 and the stopper 25 are integrally fixed to the rod 23, the operator rotates the extended end portion of the stopper 25 with a finger in a direction against the elastic force of the locking spring 28 in FIG. By doing so, the engagement between the rod 23 and the locking hole 25a of the stopper 25 is disengaged, and the rod 23 and the stopper 25 can move along the rod 23. The sliding body 24 is fixed to the slide plate 3 (not shown). Therefore, as described above, by fixing the slide body 24 to the predetermined position of the rod 23, the slide plate 3 (original table 1) and the upper and lower table 5 are connected via the slide body 24 and the rod 23. It can be fixed at any relative position.

Next, the open / close lock mechanism of the document table unit will be described. 27 and 28 are schematic configuration diagrams of the open / close lock mechanism. As shown in FIGS. 27 and 28, the TPS of this embodiment has a configuration in which a scanner unit 30 is placed on a document table unit 35. Both units 30 and 35 are connected to each other by a hinge 36 arranged on the rear side of the TPS, and have a shell-type opening / closing structure in which the front side of the TPS is opened. This TP
The open / close lock mechanism of the document table unit in S is arranged at the front part of both units 30, 35.

As described above, the side plate 18 is provided with the fixing pin 19. Further, as shown in FIG. 27, on the scanner unit 30 side, the shaft 31 is provided across the left and right side plates.
Is rotatably supported, and the open / close lock claws 32 fixed to both ends of the shaft 31 rotate in accordance with the rotation of the shaft 31. An opening / closing lever 33 is fixed near the center of the shaft 31, and by rotating the opening / closing lever 33, the opening / closing lever 33 is opened / closed with respect to the fixing pin 19 on the document table unit 35 side via the shaft 31. The lock claw 32 is adapted to be disengaged. A spring 34 is hooked on the opening / closing lever 33, and the spring 34 urges the opening / closing lever 33 in a direction in which the opening / closing lock claw 32 is engaged (locked) with the fixed pin 19.

As a result, in the state where the scanner unit 30 is closed as shown in FIG. Further, in this closed state, by lifting the opening / closing lever 33 against the urging force of the spring 34, the shaft 31 rotates and the respective opening / closing lock claws 32 are disengaged from the fixing pin 19 on the document table unit 35 side. As shown in FIG. 28, the scanner unit 30 has a hinge 36.
The upper part (document table 1) of the document table unit 35 is opened by opening upward with the center of rotation as the center of rotation.

Next, the document platen pressure fixing switching device and the document platen retracting device of this embodiment will be described. As described above, the document spring 1 configured to be movable in the vertical direction by the link plate 10 and the link arm 11 is always biased by the torsion spring 13 so as to be lifted. As a result, when the scanner unit 30 is closed with respect to the document table unit 35, the document table 1
Due to the ascending habit, the document surface of the book document BO that is opened and placed on the document table 1 is constantly pressed upward so as to be pressed against the lower portion of the scanner unit 30.

The pressing force on the document surface of this book document BO is
Normally, the scanning unit 200 in the scanner unit 30 receives the scanning. However, when the scanning unit 200 is moved to a position off the book document on the original table 1, the original table 1 and the original table 1 are moved due to the rising tendency of the original table 1. The book document BO bites into the scanner unit 30, and the scanning unit 2
The smooth movement of 00 is obstructed. Therefore, in this embodiment, the document table 1 is fixed in a state where the document table 1 is raised to an appropriate position, and the document table 1 and the scanner unit 30 of the book document BO according to the rising behavior of the document table 1 are fixed.
It is necessary to prevent extra bite into the inside. Further, as will be described later, when the scanning optical path in the scanning unit 200 is switched to read the original on the contact glass 206 arranged above the scanner unit 30, the lower portion of the scanning unit 200 and the upper surface of the original table 1 come into contact with each other. In order not to do so, it is necessary to retract the document table 1 below the document table unit 35.

The original platen pressurizing / fixing switching device and the original platen retracting device are devices for solving these problems, and a structural example of a mechanism in which both these devices are combined by one mechanism will be described with reference to FIGS. It shows in FIG. As shown in FIG. 29, the control wire 40, which is one of the components of this mechanism,
A hook 41 is fixed to one end thereof, another hook 42 is fixed to the other end thereof, and a spherical stopper ball 45 is fixed near the substantially central portion thereof. The hook 41 is the link plate 10
Outer edge (side that moves up and down as the platen 1 moves up and down)
It is fixed to. The control wire 40 extending from the hook 41 changes its direction via a pulley 46 and a pulley 47, and is wound around a control pulley 48.

Here, as shown in FIGS. 30 and 31, the control wire 40 is guided to the groove 50 of the control pulley 48, and the stop ball 45 fixed near the central portion thereof has a stop hole of the control pulley 48. It is set in 49. This allows
The movement of the control wire 40 is reliably converted into the rotational movement of the control pulley 48. The control wire 40 wound around and extended from the control pulley 48 has the hook 4 at one end thereof.
It is always pulled by one end of the tension spring 43 hung on 2. The other end of the tension spring 43 is hooked on a hook 44 fixed to the base 6 of the document table unit 35.

The control pulley 48, as shown in FIG.
It is supported by the shaft 54 via the one-way clutch 51. The shaft 54 is supported by a pair of side plates 55 on a slide bearing 52, and both ends of the shaft 54 are prevented from coming off by E-rings 53, so that the side plate 5 is interposed via the slide bearing 52.
It is rotatably supported with respect to 5. As a result, the control pulley 48 is moved relative to the shaft 54 by the arrow a in FIG.
Although the shaft 54 can freely rotate in the direction, it cannot rotate relative to the shaft 54 in the direction opposite to the arrow a by the action of the one-way clutch 51.
Rotates together with. Therefore, when the shaft 54 is fixed by the mechanism described later, the control pulley 48 becomes rotatable only in the direction of arrow a in FIG. 29, that is, in the rotation direction when the document table 1 is lowered.

Next, the lowering / fixing operation of the original platen 1 by this original platen pressurizing / fixing switching device will be described. Figure 2
9 to 31, when the shaft 54 is in the fixed state, the document table 1 is subjected to some external force, for example, the weight of the book document BO or the pressure applied by the curled pages.
When is pushed down, the hook 41 of the control wire 40 to which the platen 1 is fixed on the crocodile loosens at the crochet end. At the same time, the control pulley 48 is pulled by the tension spring 43, and the hook 41 of the control wire 40 rotates in the direction of arrow a while absorbing the looseness of the thread, so that the control wire 40 maintains the initial tension. The hook 44 moves to the alligator.

At this time, the control pulley 48 cannot rotate in the direction opposite to the arrow a due to the action of the one-way clutch 51. Therefore, even if the raising force of the document table 1 exceeds the pressing force on the document table 1. The control pulley 48 is not rotated in the direction opposite to the arrow a by the ascending force of the document table 1, and the control pulley 48 is stopped while maintaining the position rotated in the arrow a direction. Further, along with the stop of the control pulley 48, the movement of the control wire 40 is also stopped, whereby the document table 1 is lowered to a position where it is pushed down by an external force and then stopped.

Here, the fixing of the shaft 54 is performed by a document table lifting mechanism described below. That is, as shown in FIG. 32, the gear 56 is fixed to the shaft 54 so as to rotate integrally with the shaft 54.
Further, this gear 56, as shown in FIG.
The gear 57 meshes with another gear 57 rotatably supported by a stud 59 fixed to, and the rotation is transmitted to the gear 57. Further, the gear 57 is integrally formed with the worm wheel 58, and the worm wheel 58 is configured to mesh with the worm gear 60 fixed to the output shaft of the document table lifting motor 61. With this configuration, when the platen raising / lowering motor 61 is stopped, the worm wheel 60 cannot rotate due to the engagement of the worm gear 60 and the worm wheel 58, and the gear 5 integrated with the worm wheel 58 is not able to rotate.
The shaft 54 connected through the gear 56 meshing with the shaft 7 is fixed.

Next, the operation of retracting the original table 1 to the lower side of the original table unit 35 will be described. 32 to 34, when the document table raising / lowering motor 61 is driven so that the gear 56 rotates in the direction of arrow b, the one-way clutch 51
As a result, the control pulley 48 and the shaft 54 rotate as a unit, the control pulley 48 rotates in the direction of arrow a in FIG. 29, and the control wire 40 moves the hook 44 to the burr. With the movement of the control wire 40, in FIG. 34, the left and right manuscript tables 1 are lowered, and the upper surface of each manuscript table 1 (the manuscript surface of the book manuscript BO in this embodiment) is separated from the scanning unit 200. It is retracted to a position below the base unit 35. This retracting operation is executed when the power of the apparatus main body is turned on or when the apparatus is in a standby state in which scanning for reading is not performed, and when an original document on the contact glass 206 arranged above the scanner unit 30 is read.

Next, the operation of pressing the document table 1 upward of the document table unit 35 will be described. Contrary to the above-described retracting operation, in FIGS. 32 to 34, the gear 56 is indicated by the arrow c.
When the platen raising / lowering motor 61 is driven so as to rotate in the direction, the shaft 54 rotates in the direction opposite to the arrow a direction in FIG. 29, and the control pulley 48 can freely rotate with respect to the shaft 54 by the action of the one-way clutch 51. It will be in a state. Here, in this embodiment, the force of the torsion spring 13 that pushes the document table 1 upward causes the control wire 4 to move.
It is set stronger than the force that pulls 0 downward. Therefore, in the state where the control pulley 48 can freely rotate in the direction opposite to the arrow a direction in this manner, the force of the torsion spring 13 that pushes the document table 1 upward causes
The control wire 40 moves the hook 41 to the alligator.

By the movement of the control wire 40, as shown in FIG.
At the same time, the left and right manuscript tables 1 are raised, and the manuscript surface of the book manuscript BO which is opened and placed on the upper surface of each manuscript table 1 is pressed by the scanning unit 200. In this manner, when the document tables 1 on the left and right are raised, and the document table lifting motor 61 is continuously driven in a state where the document surface on each document table 1 is in pressure contact with the scanning unit 200, control is performed by the action of the one-way clutch 51. The shaft 54 is allowed to freely rotate with respect to the pulley 48, and the pressure contact state of the document surface to the scanning unit 200 is maintained. This pressurizing operation, as described later,
It is executed only when the scanning unit 200 is on the document table 1.

This document table pressure fixing switching device, and
As shown in FIG. 34, the document table evacuation device is provided for each of the pair of left and right document tables 1 and is independently controlled according to the moving position of the scanning unit 200. In other words, as shown in FIG. 21, the TPS control board 110 causes the TPS control board 110 to move up and down the original table raising and lowering motors 61, which are a pair of left and right original table raising and lowering motors 61, which are drive sources for the original table pressurizing and fixing switching device and the original table evacuation device. Motor driver 1
21 and are controlled independently of each other.

FIG. 35 shows a retracting operation diagram of the original table 1 in the retracting operation mode described above, and FIG. 36 shows a timing chart thereof. In this retracting operation mode, as shown in FIG. 36, the left and right platen raising / lowering motors 61 are respectively rotated by a predetermined number of revolutions prior to the start of movement of the scanning unit 200, and as shown in FIG. Lower the document table 1 downward. After that, the scanner motor 106 is driven to move the scanning unit 200 in a predetermined direction to perform scanning. If necessary, this scanning is repeated many times. Then, at the end of the retracting operation mode, the left and right platen raising / lowering motors 61 are normally rotated a predetermined number of times to return the left and right platen 1 to their original positions.

Next, the pressurizing / fixing mode of the document table 1 will be described. When setting the book original BO on the TPS, as shown in FIG. 37, the spine of the book original BO is applied to the back support plate 14, the size stopper 27 shown in FIG. The document is moved according to the thickness of the document BO. By the movement of the slide plate 3, the spine of the book original BO is pinched by the inner ends of the left and right original trays 1. In this state, the slide plates 3 are fixed by the size stoppers 27, and then the book original BO is moved. Open the page to start reading and place this spread book manuscript on the left and right manuscript plates 1
Set it on and close the scanner unit 30. As a result, as shown in FIG. 27, the open / close lock claw 32 engages with the fixed pin 19 and the scanner unit 30 is locked with respect to the document table unit 35 in the closed state. At this time, the open / close lock sensor 20 causes the scanner unit 3 to
It is detected that 0 is closed.

By the way, at the end of the operation of this TPS,
The scanning unit 200 returns to the central home position (center point of the set book document BO) shown in FIG. Therefore, even when the book document BO is set on the TPS, the scanning unit 200 is located at the center home position. As a result, the book document BO is TP
Since the center of S is set as a reference, when the scanner unit 30 is closed, a book document of any size can be surely pressed and the setability of the book document is improved. Further, by setting the book document as the central reference in this way, the control timing (read start; read end timing, page turn start timing, etc.) when the book page is read and turned over is relatively set. Easy to take. Further, by setting the book document as the center reference in this manner, it becomes easy to detect the edge of the book document, which is also an advantage.

On the other hand, when reading the document set on the contact glass 206 of the scanner unit 30,
As shown in FIG. 4, the right end portion of the scale 207 arranged on the left side of the contact glass 206 serves as the end face reference with the reference set position of the document. As described above, in this case, the reference set position is different from the reading start position of the book original, and the configuration is set to the minimum size. That is, by setting the reference set position of the original as the end surface reference in this way, the reading start point of the original set on the contact glass 206 is always constant, and its control is simplified.

When the TPS enters the sheet mode for reading the original on the contact glass 206, the scanning unit 200 moves to the left from the center home position and stops at the edge home position detected by the edge HP sensor 115. (FIG. 37), and waits until the reading condition is input and the start button is pressed.

Here, the scale 207 is arranged on the right side of the contact glass 206, that is, on the page-turning start side of the book document, and the document table 1 and the contact glass 206 are arranged.
By placing the originals on both of them and scanning them by the scanning unit 200, it is possible to simultaneously read the originals on the contact glass 206 while turning the pages of the book originals on the original table 1. In the case of this configuration, the optical path of the reading optical path of the scanning unit 200 is switched during the page turning scanning of the book document, as described later. According to this structure, the reading direction of the scanning unit 200 in the sub-scanning direction is on the document table 1 and the contact glass 206.
Since the above is the same and the sheet discharging direction is the same during printing, it is not necessary to invert the memory.

Further, the book original BO is set on the original table 1 and the sheet original SO is set on the contact glass 206,
The scanning unit 200 is scanned from the end home position to read the book document BO on the document table 1, and the page of the book document BO is turned by the return scanning of the scanning unit 200, and the sheet document S on the contact glass 206 is read.
The mode for reading O can also be set. In this case, even during the reading page turning operation of the book document BO, by setting the sheet document SO on the contact glass 206 and setting the interruption mode, the reading page turning operation of the book document BO is interrupted. Both originals can be read without scanning. Here, regardless of which side of the contact glass 206 the scale 207 is arranged on, the image read from the original on the contact glass 206 is mirror-inverted in the main scanning direction and the frame memory 1 is read.
It is stored in 04.

In this embodiment, the reference set position of the original in the depth direction on the original table 1 and the contact glass 206 is configured such that the front side of the apparatus main body is the abutting reference, and the original set on the original table 1 and Contact glass 206
This makes it easier to set the originals. Further, when the operation of the scanning unit 200 in the present embodiment is started, the central HP sensor 114 again confirms that the scanning unit 200 is in the central home position. Then, when a start signal is sent from the operation display control unit 111 shown in FIG. 21, the scanning unit 200 moves from the center home position to the left side, and the end HP sensor 115.
It stops at the end home position detected by.

37 to 41 are transition diagrams of the scanning unit 200 in the pressure / fixing mode of the document table 1, and FIG.
2 shows the timing chart. As shown in FIG. 37, the end home position of the scanning unit 200 is a read page turning operation start point for the book document BO and an operation end point thereof. Also,
At this end home position, the scanning unit 200 does not rest on the document table 1. In the pressurizing / fixing mode of the document table 1, first, the scanner motor 106 of the scanning unit 200 is normally rotated to move the scanning unit 200 rightward in FIG.

Then, when the document pressing roller 281a on the right side of the scanning unit 200 is applied to the left end of the book document BO (point A in FIG. 38), the document platen raising / lowering motor 61 on the left side is rotated in the normal direction to move the document on the left side. The document table 1 is put in a pressurized state. As a result, the book document BO is scanned by the scanning unit 20.
Pushed to 0 for optimum reading. Then, as shown in FIG. 39, a short time before the scanning unit 200 reaches the center point of the book document, the right document pressing roller 281a is caught on the left end of the right document table 1 (FIG. 4).
2 point B). At this time, the right platen raising / lowering motor 61 is rotated in the normal direction to put the right platen 1 in a pressurized state.

Next, the scanning unit 200 passes the center point of the book document and starts reading the right page of the book document BO. After that, the left original pressing roller 28
1b is placed on the right end of the left platen 1 (point C in FIG. 42). At this time, the left platen raising / lowering motor 61 is stopped and the left platen 1 is fixed. This allows
The book document BO is pressed and fixed to the document pressing sheet 282b without being cut into the scanner unit 30,
The same height is maintained until the next scanning unit 200 passes.

FIG. 40 shows an operating state of the scanning unit 200 during reading or turning of the right page of a book document. After scanning the right page of the book document, the scanning unit 200 is stopped with the left document pressing roller 281b hanging on the right end of the right document table 1 (point D in FIG. 41), and then the scanner motor 106 is rotated in the reverse direction. Then, the scanning unit 200 is moved leftward in FIG. As a result, the scanning unit 200 turns to the left while flipping up the right page of the book document BO, and slightly before the center of the book document shown in FIG. 39 is reached, the left document holding roller 281b causes the left document table 1 to move. On the right edge of (C point). At this time, the left platen raising / lowering motor 61 is rotated in the normal direction to bring the left platen 1 into a pressurized state.

Then, the scanning unit 200 starts the operation of passing the book manuscript center point and superimposing the turned up right page on the left side page of the book manuscript BO. After that, the right document pressing roller 281a is moved to the right document table 1
On the left edge of the (B point). At this point, the right platen lifting motor 61 is stopped and the right platen 1 is fixed. As a result, the book document BO does not bite into the scanner unit 30 and the document pressing sheet 282a
Then, the same height is maintained until the next passage of the scanning unit 200. After that, the scanning unit 2
00 moves to the end home position shown in FIG. 37 and stops.

Next, the structure of the slider in this embodiment will be described. FIG. 43 shows an exploded perspective view of the structure of this slider. In FIG. 21, a pair of pins 62, which are a thickness detection input portion of a book document and a left and right page difference detection input portion of an opened book document, are movable in a direction perpendicular to the sliding direction of the pair of racks 63. , Attached to each rack 63, respectively. These pins 62 and rack 6
As shown in FIG. 44, the gears 3 are arranged so as to face each other so as to sandwich the small gear 65a of the two-stage pinion gear 65, and the racks 63 are meshed with the small gear 65a. As a result, in FIG. 44, the pins 62 move toward and away from each other and the pin spacing changes, whereby the racks 63 move in different directions and the two-stage pinion gear 65 rotates.

Here, each pin 62, together with each rack 63, can move in the Y direction in FIG. 44, and due to the engagement between each rack 63 and the small gear 65a, it is always symmetrical with respect to the center of the two-stage pinion gear 65. In position. Further, the movement of each pin 62 in the X direction in FIG. 44 is performed by fitting the base portion of each pin 62 into the restriction groove 83 formed in the cover (not shown), so that each pin 62 is moved as shown in FIG. Are restricted so that they cannot move in the X direction when they are separated from each other, and they can move in the X direction when the pins 62 approach each other.

As shown in FIG. 46, each rack 63 is guided by a pair of guides 84 of the large gear 64 so as to slide on the side surface of the large gear 64. FIG. 47 shows a sectional view of a connecting portion between the slider 78 and the document table 1. As shown in FIG. 47, a hole is bored in the center of the large gear 64, and the two-step pinion gear 65 is fitted into the hole from the back side thereof, and the small gear 65a of the two-step pinion gear 65 is fitted on the front side thereof. It meshes with each rack 63.
Further, each pin 62 is, as shown in FIGS. 47 and 48,
The adjustment studs 4 fixed to the slide plate 3 of each document table 1 are fitted into the holes.

As shown in FIG. 49, the large gear 64 meshes with the slide output gear 66, and the large gear 64 and the slide output gear 66 are rotatably supported by the support plate 79. The gear ratio between the large gear 64 and the slide output gear 66 is set to 2: 1.
As shown in FIG. 50, the large gear 65b of the two-stage pinion gear 65 meshes with the small gear 67a of the pair of two-stage gears 67, and their gear ratio is set to 2: 1. The large gear 67b of the two-stage gear 67 is the idle gear 6
The cam gears 69 are in mesh with each other via the shafts 8. These two-stage pinion gear 65, two-stage gear 67,
The idle gear 68 is rotatably supported by each stud (not shown) fixed to the slide side plate 70. The pair of cam gears 69 are rotatably supported by the support plate 79 (FIG. 49).

As shown in FIG. 51, the slide output gear 66 is provided with an adjusting groove 85 extending from the end of the boss portion to the position beyond the center. Also, each cam gear 69
As shown in FIGS. 52 and 53, each is formed in a tubular shape, and the spiral pin moving groove 8 is formed in one of the ports.
6 perforated surfaces are provided respectively. As shown in FIGS. 52 and 53, the slide output gears 66 are fitted in the tubular portions of the tubular cam gears 69, and the adjustment grooves 85 of the slide gears 66 and the pin movement grooves 85 of the cam gears 69 are formed. Output pin 7 to be described later is provided in the opening formed by crossing.
5 are fitted together.

The position of the opening formed by intersecting the adjusting groove 85 of the slide gear 66 and the pin moving groove 85 of the cam gear 69 changes due to the relative rotation of the cam gear 69 and the slide output gear 66, and the change of the opening position. The position of the output pin 75 moves according to. The moving amount of the output pin 75 is set to move by 1/2 of the moving amount of the pin 62. When the cam gear 69 and the slide gear 66 rotate at the same time, this opening makes a circular motion with the distance between the center of both gears and the output pin 75 as a radius. The radius of the circular motion of this opening is set to be 1/2 of the radius of the circular motion of the pin 62 when the large gear 64 rotates.

On the other hand, on the outside of the slide side plate 70, as shown in FIG.
As shown in FIG. 3, three vertical slide pins 71 are fixed, and these vertical slide pins 71 have three vertical elongated holes 72 formed in a horizontal slider plate 72 as shown in FIG.
They are slidably supported by a. As a result, the slide side plate 70 can move vertically with respect to the horizontal slider plate 72. Further, three lateral slide pins 73 are fixed to the outside of the lateral slide plate 72,
These lateral slide pins 73 are slidably supported in two lateral oblong holes 74a formed in the fixing plate 74 (FIG. 55). As a result, the horizontal slide plate 72 is
It is movable in the left-right direction with respect to the fixed plate 74.

The pair of output pins 75 are shown in FIGS. 43 and 55.
As shown in FIG. 6, each of the two vertical guide pins 76 is fixed to each pin holder 77. These vertical guide pins 76 are two vertical holes 74b formed in the fixing plate 74.
Each of the output pins 75 penetrates through two vertical guide holes 74c formed in the fixing plate 74, and is slidably supported by the adjusting groove 85 of the slide gear 66 and the pin of the cam gear 69. The openings are formed so as to intersect with the moving groove 85, respectively. As a result, each pin holder 77 can move vertically with respect to the fixed plate 74, and each output pin 75 can move vertically with the gear group described above.

The slider 78 constructed as described above is
The pair of pins 62 is used as an input unit to detect the thickness of the book document BO and the page difference between the left and right pages when the book document is opened, and the reading center of the spread book document (the valley formed in the binding section of the book document) is always detected. The book document BO can be moved together with the document table 1 by using each output pin 75 as an output section so as to reach a predetermined position of the document table 1.

Next, the movement of the book original and the action of the slider 78 will be described. As shown in FIG. 56, when the book document BO is opened upward and the contents of the page are read, the left and right pages of the book document BO (the reading surface 8
9) to make the same plane, the cover 90 of the book manuscript BO
When a force is applied to the back cover sheet 91 from below, the spine cover sheet 88 of the book document BO is inclined due to the page difference between the left and right sides. As a result, when viewed from the reading surface side of the book original, the reading center S point of the spread book original (valley formed in the binding portion BOa of the book original) is horizontally separated from the point P at the center of the spine cover 88 by the distance X1. It shifts.

By setting the reading range of the scanning unit 200 to a specific range in advance as in this embodiment, the reading control of the scanning unit 200 can be simplified. However, in this way, the scanning unit 2
When the reading range of 00 is set to a specific range in advance, the center point of the reading range of the scanning unit 200 is always located at the center P point of the spine cover 88 of the book original, and thus the spread book is opened as described above. Original reading center S
If the point deviates from the central point P of the spine cover 88, the image read by the scanning unit 200 deviates by the amount of deviation (distance X1) of the reading center S point of the spread book document. Therefore, in this embodiment, as a means for correcting the deviation amount of the reading center S point of the spread book document, the slider 78 is used to reverse the direction of deviation of the reading center S point of the book document, that is, this direction. The book document BO is moved together with the document table 1 in the direction in which the point S and the point P at the center of the spine cover 88 coincide with each other by a distance X1 corresponding to the amount of deviation of the reading center S point.

In FIG. 56, the inclination of the back cover 88 is TH
1. Let R1 be half the total thickness BF of the book document, R1, and let X1 be the horizontal shift amount between the reading center S point of the spread book document and the center P point of the spine cover 88, X1 = (R1 / 2) × Sin (2 × TH1). Therefore, the slider 78 detects the thickness R1 of 1/2 of the total thickness BF of the book original and the inclination TH1 of the back cover 88, and the reading center S point of the spread book original and the back cover 88 are detected from the above formula. The horizontal shift amount X1 from the center P point is calculated, and the read center S point shift amount X is reversed in the direction opposite to the read center S point shift direction of this book document.
By moving the book document BO together with the document table 1 by 1, the reading range of the scanning unit 200 can be always set to a fixed range, and the reading control of the scanning unit 200 can be simplified.

In the slider 78 of this embodiment, as shown in FIG.
7 and the operation as shown in FIG. 58 realizes the correction of the deviation amount X1 of the reading center S point. Here, FIG. 57 shows the positional relationship between the pins 62 and the output pins 75 when the pages of the book document are opened evenly on the left and right. Fig. 57
Also, in FIG. 58, the distance between the two pins 62 supported by the large gear 64 is set to the total thickness BF of the book document BO. That is, the book document BO is placed on the pair of left and right document tables 1
When the size stopper 27 is released, the spine 88 of the book document BO is pinched at the end of the document table 1 on the center side of the apparatus main body, and the size stopper 27 is stopped. The distance between the centers of the respective adjustment studs 4 fixed to the slide plate 3 of No. 1 is exactly the total thickness BF of the book document BO.

As a result, the distance R2 between the center of each slide output gear 66 and each output pin 75 fitted to these slide output gears 66 is reduced by the action of the cam gear 69 to be described later. Thickness BF 1/4 (R
2 = R1 / 2). By the way, the gear ratio of the large gear 64 and each of the slide output gears 66 becomes 1: 2 due to the gear ratio thereof as described above, so that the large gear 64 rotates by the angle TH1 as shown in FIG. Then, each slide output gear 66 rotates by an angle TH2 which is twice as large as that of the large gear 64. Further, the rotation directions of the large gear 64 and each slide output gear 66 at this time are opposite to each other. Therefore, the center of these slide output gears 66,
The horizontal distance {R2 × Sin (TH2)} from each output pin 75 fitted to these slide output gears 66 becomes (R1 / 2) × Sin (2 × TH1) in the above equation, and the spread book document. Is the horizontal shift amount X1 between the reading center S point and the central point P of the spine cover 88. As shown in FIG. 55, the output pins 75 are restricted from moving in the horizontal direction by the pin holder 77 and the fixing plate 74. Therefore, the rotation of the output pins 75 causes the slider 78 itself. However, with each manuscript table 1 and book manuscript BO,
The horizontal distance, that is, the shift amount X1, is relatively moved in the direction opposite to the shift direction.

FIG. 59 is a mechanism diagram for explaining the relationship of the movement amount of each pin 62 and each output pin 75. As shown in FIGS. 47 and 48, each pin 62 corresponds to each document table 1
Of the adjusting studs 4 fixed to the slide plate 3 of FIG. When one pin 62 moves toward the center of the apparatus body by the distance F, the action of each rack 63 and the two-stage pinion gear 65 causes the other pin 62 to move toward the center of the apparatus body by the same distance F. At this time, the rotation of the two-stage pinion gear 65 is transmitted to each cam gear 69 by the gear group described above, and each cam gear 69
Rotate in opposite directions by a rotation angle that is twice the rotation of the two-stage pinion gear 65. As a result, each cam gear 69
The spiral pin movement groove 86 of FIG. 3 rotates relative to the adjustment groove 75 of each of the stopped slide output gears 66, and the positions where these grooves intersect with each other, that is, the position of each output pin 75, , Move toward the center by 1/2 the distance F of the pin 62. Here, the size of each rack 63 and each gear and the spiral shape of each pin movement groove 86 are set so as to satisfy the above conditions.

With these settings, the large gear 64 rotates without changing the interval between the pins 62, and the two-stage pinion gear 6 is rotated.
When 5 also rotates integrally, the respective slide output gears 66 and the cam gears 69 rotate in the same direction by the same rotation angle, so that the pin movement groove 96 of the cam gear 69 and the adjustment groove 85 of the slide output gear 66 are rotated. Position of the opening where the two intersect with each other, that is, the output pin 7 fitted in this opening
The position 5 rotates without moving in the radial direction of the slide output gear 66 (without changing R2), and its set value does not shift during operation, and the reading center (point S) of the spread book document is always set. It can be corrected to a fixed position (point P).

Further, the slider 78 in this embodiment is
As shown by the broken line in FIG. 45, in the case of a thin book document in which the distance between the pair of pins 62 becomes small, the load due to the above-described correction operation of the reading center (point S) of the spread book document becomes large. The restriction groove 83 of each pin 62 is formed to be large at the center thereof so that both document tables 1 can freely move up and down without performing a correction operation.

The above-mentioned correction of the reading center (point S) of the two-page spread original can be realized by a method different from that of the slider 78 described above. For example, a book document BO thickness input device or detection device, a document table position detection device or a spine cover inclination detection device, a document table lateral movement drive device (for example, FIG. 6).
As shown in FIG. 0, the motor 92 with an encoder rotates the feed screw 93 which is horizontally mounted along the moving direction of the document table 1, and the feed female screw 94 screwed to the feed screw 93 is moved to move the feed female screw 94. A linear feed device for laterally moving the platen 1 integrated with 94) and the like are used to calculate the deviation amount X1 based on the above-described calculation formula, and each platen 1 is moved by the deviation amount X1 to shift the respective deviations. It should be resolved. However, since the slider 78 of the present embodiment does not use an electrical device, its running cost becomes unnecessary, and a device for correcting this deviation amount can be provided at low cost.

Next, the structure of the scanner unit 30 in this embodiment will be described. In FIG. 34, TPS (Tu
1 shows an overall configuration diagram of a rn the Page Scanner). In this TPS, a contact glass 206 is arranged on the upper part of the main body of the device, and a sheet or a thick original such as a book original is set on the contact glass 206 by a pressure plate (not shown), and the optical path is switched as described later. Scanning unit 2
The document image on the contact glass 206 can be read by scanning the document at 00.

The upper half of the main body of the TPS device is a scanner unit 30, and the scanning unit 200 runs inside the scanner unit 30 in the left-right direction in FIG. 34 to scan a document. This scanning unit 20
FIG. 61 shows a configuration diagram of the 0 scan drive system. FIG. 61 shows a scanning drive system of the scanning unit 200 as seen from the top of the apparatus body. In FIG. 61, a timing belt 312 is provided on the back side of the apparatus body by a pulley 304 and a three-stage pulley 302 on the front side of the apparatus body. The timing belt 313 is stretched in the left-right direction by a pulley 305 and a two-step pulley 306.

Here, the rotating shafts of the pulley 304 and the pulley 305 are supported by a spring 307 and a spring 308, respectively, and give a predetermined tension to the timing belts 312 and 313. The three-stage pulley 302 is connected to the motor pulley 301 by a timing belt 310 and the two-stage pulley 306 by a timing belt 311. The timing belt 311 obtains a predetermined tension by pulling the idler 303 outward with a spring 309. The scanning unit 200 has a clamp 31 on the back side and the front side.
5 is fixed to the timing belts 312 and 313, respectively, and the timing belt 3 is rotated by the rotation of the scanner motor 106 that drives the rotation shaft of the motor pulley 301.
Driven via 12, 313.

FIG. 62 shows the structure of the scanning unit 200 in this embodiment. In FIG. 62, the scanning unit 20
Document holding rollers 281a and 281b are provided on the left and right below 0.
However, on the outside of the sheet winding roller 280
a and 280b are rotatably supported respectively.
The sheet winding rollers 280a and 280b are wound around the respective central end portions of the left and right document holding sheets 282a and 282b, and the outer ends of the respective document holding sheets 282a and 282b are wound. , Are fixed to the side plates of the scanner unit 30, respectively. These document pressing sheets 282a and 282b are composed of a sheet-shaped member in which a rubber-based resin is melted from both sides to a cloth (cloth) woven with Tetoron yarn, and due to the uneven marks of the cloth remaining on the surface, It has a structure that makes it difficult for the adsorption force due to charging to act.

Further, the sheet take-up rollers 280a, 2
As shown in FIG. 63, one of the structures 80b has a double structure, and the winding roller shafts 251a and 251 are provided.
b and cylindrical sheet winding rollers 280a, 280b
The spring springs 252a and 252b are attached between and. As a result, the take-up roller shaft 251
By rotating a and 251b further than the state in which the document pressing sheets 282a and 282b are stretched, a certain amount of tension can be applied to the document pressing sheets 282a and 282b by the action of the spiral springs 252a and 252b.

Further, as shown in FIG. 64, sheet winding gears 232a and 232b are fixed to the outer ends of the respective winding roller shafts 251a and 251b, and these sheet winding gears 232a and 232b are The left and right ends are fixed to the side plates of the scanner unit 30, and the idle gears 2 are attached to the drive rack 231 having teeth over substantially the entire length.
They are meshed with each other via 33a and 233b.
As a result, when the scanning unit 200 travels in FIG. 64, the sheet winding gears 232a and 232b rotate together with the idle gears 233a and 233b, and the winding roller shafts 251a and 251b and the spiral spring 2 respectively.
52a, 252b and each sheet winding roller 28
0a, 280b, through the respective original pressing sheet 282a,
282b is pulled out and wound up, and the tension of the left and right sheet winding rollers 280a and 280b is constantly
It is kept almost constant. At this time, each original pressing sheet 28
Each sheet winding roller 2 depending on the thickness of 2a and 282b
The scanning unit 20 is formed by the thickening of the windings 80a and 280b.
Each sheet take-up roller 28 generated by the position of 0
0a, 280b wrapped around the document holding sheet 282
The outer peripheral difference between a and 282b is
Absorbed by 52b.

On the other hand, as shown in FIG. 62, a platen glass 205 for reading a book document and a turning belt 208 for turning the page of the book document are arranged between the document pressing rollers 281a and 281b. The platen glass 205 for reading the book original in the present embodiment is provided on the upstream side in the reading scanning direction of the scanning unit 200.
Further, the turning belt 208 for turning the pages of the book manuscript is
They are arranged on the downstream side of the scanning unit 200 in the reading scanning direction. By arranging in this way, the run-up section for the reading scanning of the scanning unit 200 can be lengthened and the scanning can be stabilized. Further, in this embodiment, the page turning mechanism is arranged on the lower side of the same unit, and the reduction optical system is arranged on the upper side of the same unit to realize the miniaturization of the apparatus.

Further, with this structure, the scanning unit 200 receives the book original document (details will be described later) pressed by the left original document pressing roller 281b and the turning belt driving roller 223, and receives these. Since the document surface (reading surface 273) positioned between the rollers can be read, an optimum image can be obtained. At this time, the lower surface position of the platen glass 205, as shown in FIG. 65, allows for the floating margin of the document surface in advance, and the lowermost point of the left document pressing roller 281b and the turning belt driving roller 22 are set.
Horizontal plane formed by connecting the lowest point of 3 (reading surface 27
It is set upward by a gap a which is slightly smaller than 3). The value of the gap α is set so that 2α is equal to or less than the depth of focus of the optical system, and is determined according to the reduction ratio of the optical system.

As shown in FIG. 66, the platen glass 205 has its side portion supported by a glass holder 269. Further, a glass chamfered portion 271 is provided at the lower end portion of the platen glass 205, and a holder chamfered portion 270 is provided at the outer lower end portion of the glass holder 269. At this time, the position of the side corner portion 272 of the glass chamfered portion 271 is configured to be positioned above the lower surface of the glass holder 269 by a slight height β, and the platen glass is operated during the operation of the scanning unit 200. The side of 205 is designed so that the page edge of the book document is not caught.

On the other hand, inside the platen glass 205,
As shown in FIG. 62, two fluorescent lamps 201 and 202 for illuminating a book document are arranged on the left and right sides of the book document reading unit, respectively. The book document image illuminated by these fluorescent lamps 201 and 202 is reflected by the first mirror 219 in FIG.
The light is reflected by the mirror 221 alternately, finally passes through the lens 216, and is reduced and imaged on the CCD 101.

The turning belt 208 is stretched over the turning belt drive roller 223 and the turning roller 224, and on the upper side of the turning belt 208 outside the turning belt drive roller 224,
The charging roller 225 is arranged in contact with it. Further, at the end of the drive shaft of the turning belt drive roller 223, as shown in FIG.
As shown in, the turning belt drive gear 234 is fixed, and the turning belt drive gear 234 meshes with the drive rack 231 via the idle gear 235. As a result, when the scanning unit 200 travels, the turning belt driving gear 234 rotates along with the idle gear 235 along the driving rack 231, and the turning belt driving roller 223 rotates to turn at the same speed as the moving speed of the scanning unit 200. The belt 208 rotates.

When reading a document set on the above-mentioned contact glass 206, a switching mirror 222 which is retracted to a position deviated from the reading optical path of the scanning unit 200 as shown in FIG. 62 is shown in FIG. By the action of the keep solenoid 255, as shown in FIG. 68, the keep solenoid 255 is moved to a position advanced into the reading optical path of the scanning unit 200. This movement of the switching mirror 222 causes the optical path between the first mirror 219 and the second mirror 220 to move, as shown in FIG.
The original image on the contact glass 206 switched from the 05 side to the contact glass 206 side indicated by the solid line and illuminated by the two fluorescent lamps 203 and 204 shows the second mirror 220 and 3 mirror 22
1 is reflected alternately and transmitted through the lens 216 to the CCD 10.
1 is reduced and imaged.

As shown in FIG. 67, the switching mirror 222 is supported by a switching mirror bracket 257, and the switching mirror bracket 257 is rotatably supported by the upper fulcrum 258 of the optical path adjusting plate 259. . The keep solenoid 255 is arranged at the end of the switching mirror bracket 257 on the side opposite to the side where the switching mirror 222 is supported.
When 55 is turned on / off, the switching mirror bracket 257 is swung about the upper fulcrum 258 of the optical path adjusting plate 259 as an axis between the position shown by the broken line and the position shown by the solid line in FIG. As a result, as described above, the position of the switching mirror 222 is the book document reading position retracted from the reading light path of the scanning unit 200 shown in FIG. 62, and the sheet material advanced into the reading light path of the scanning unit 200 shown in FIG. It is selectively moved to the document reading position. Here, the retracted position of the switching mirror 222 outside the optical path (the position of the broken line in FIG. 67) is not particularly restricted by the movement of the keep solenoid 255, but the advanced position of the switching mirror 222 into the optical path (FIG. 67).
Is the switching mirror bracket 25.
The swing of 7 is regulated by the positioning pin 256 to regulate the stop position of the switching mirror 222 in the optical path.

The switching mirror 222 in this embodiment.
Is configured so that the switched optical path can be adjusted. That is, the optical path adjusting plate 259 in this embodiment is
As shown in FIG. 67, the lower part of the unit main body of the scanning unit 200 is rotatably supported at a lower fulcrum 262, and it abuts on both sides between the upper fulcrum 258 and the lower fulcrum 262. 260 and adjusting screw 26 arranged as
And 1 and are supported substantially vertically. The optical path adjusting plate 259 has a spring 260 which has a habit of rotating in a direction in which the upper fulcrum 258 thereof is switched and the switching mirror 222 is displaced all the way.
The rotation position of the optical path adjusting plate 259 is urged by the head of the adjusting screw 261 arranged on the crocodile which faces the spring 260 and abuts on the side of the optical path adjusting plate 259. It is positioned by. Therefore, the optical path adjusting plate 259 changes the position of the upper fulcrum 258 about the lower fulcrum 262 by rotating the adjusting screw 261 and the position of the switching mirror bracket 257 supported by the upper fulcrum 258. And the position of the switching mirror 222 is moved to adjust the switched optical path.

In the optical system of the scanning unit 200 in this embodiment, the mirrors other than the switching mirror 222 are
The platen glass 20 does not have the optical path adjusting function as described above.
The CCD 10 is used to adjust the optical path for reading the book document on the 5 side.
The contact glass 20 is performed by adjusting the position of 1.
The adjustment of the optical path for reading the document on the 6 side is performed by adjusting the position of the switching mirror 222 by the above method. As a result, in the optical system of the present embodiment, the number of adjustment points can be reduced, and its assemblability and maintainability can be improved. Further, in the optical system of the present embodiment, the keep solenoid 255, the connecting elements thereof, and the like are housed in the scanning unit 200,
By removing the scanning unit 200 together with the replacement of the optical system element, its maintainability is improved.

As another embodiment of the above-mentioned optical path switching system, the configuration of the optical system by the switching mirror rotation system is shown in FIG.
9 shows. In this embodiment, the switching mirror bracket 264 supporting the switching mirror 222 is rotatably supported by the unit main body of the scanning unit 200 at a fulcrum 265. The solenoid 263 is provided on the switching mirror 22 of the switching mirror bracket 264.
The solenoid 263 is provided at the end opposite to the supporting side of the switch 2, and when the solenoid 263 is turned on / off, the spring 266 pulls the switch mirror bracket 264 in the direction opposite to the solenoid 263.
4 is swung about the fulcrum 265 as an axis between a position shown by a broken line and a position shown by a solid line in FIG.

As a result, the position of the switching mirror 222 is selectively moved between the book original reading position shown by the broken line in FIG. 69 and the sheet original reading position shown by the solid line in FIG. Here, when the optical path of the switching mirror 222 is switched to the optical path for reading the book original through the platen glass 205, the switching mirror 222 is attached to the positioning pin 268 and the switching mirror 22 is moved.
The stop position of No. 2 is regulated so as to be the broken line position in FIG. When the optical path of the switching mirror 222 is switched to the optical path for reading the sheet original through the contact glass 206, the switching mirror 222 is attached to the positioning pin 267 and the switching mirror 22 is moved.
The stop position of No. 2 is regulated so as to be the solid line position in FIG.

Next, the page turning operation of the scanner unit 30 will be described. FIG. 70 shows an operation explanatory view of the page turning portion of the scanning unit 200 in this embodiment. The page-turning section is provided with a book document page adsorbing means for adsorbing and lifting the uppermost page of the book document placed open and placed, and a book document page separating the extra pages adsorbed by the page adsorbing means. And a page separating means.

The turning belt 208 in this embodiment is
It has a two-layer structure formed of an elastomer, and its front surface layer is a high resistance layer having a surface resistance of 10 ¹⁴ Ω or more, and its back surface layer is a low resistance layer having a surface resistance of 10 ⁸ Ω or less. The turning belt drive roller 223 is composed of a grounded metal roller whose surface is coated with conductive rubber.
Realizes reliable belt drive and grounding. Further, the turning belt drive roller 223 is used to turn the turning belt 208.
The turning belt 208 is rotatably driven so that the linear velocity of is equal to the moving speed of the turning portion. The charging roller 225 has a metal roller or a metal roller having a surface resistance of 10 ⁸ to 10 ^8.
The charging roller 225 is covered with ¹¹ Ω rubber, and while driving the turning belt 208, the changeover switch 25 is attached to the charging roller 225 at a timing described later.
By applying a high voltage of ± 2 kV from the AC power supply 253 via 3a, an alternating electric field is generated on the surface of the turning belt 208, and the page attracting force of the book original is generated on the turning belt 208.

That is, in FIG. 70, the changeover switch 2 is moved in accordance with the timing described later while the scanning unit 200 is running and the turning belt 208 is driven.
When 53a is turned on and a high voltage of ± 2 kV is applied to the charging roller 225 from the AC power source 253, an alternating electric field is generated on the surface of the turning belt 208, and by the action of this alternating electric field,
A suction force is generated on the surface of the turning belt 208 to suck the uppermost page 254 of the book document BO which is in contact therewith.

When the document reading operation is started,
As shown in FIG. 37, the scanning unit 200 at the left end home position of the scanner unit 30 starts traveling rightward in FIG. When the original reading position of the platen glass 205 of the scanning unit 200 reaches the left page of the book original BO, the optical system of the scanning unit 200 starts the reading operation of the book original BO as shown in FIG. The document surface of the book document BO is read from the left page to the right page. The reading start position of the scanning unit 200 here is the book document BO.
Of the original on the contact glass 206 (scale 2).
(Reference end of 07). In this way, when the optical system of the scanning unit 200 finishes reading up to the edge of the right page of the book document BO, as shown in FIG.
73, the document scanning direction is reversed, and as shown in FIG. 73, the page turning operation of the right page of the book document BO which has been read is started.

When turning the pages of the book document BO, the turning belt 208 and the page separating roller 2 described later are used.
70 is located at the position indicated by the broken line in FIG. 70, and prior to this page turning operation, the charging pattern portion formed on the surface of the page turning belt 208 is on the top page 254 of the book original BO. Overlap. Then, when the leading end of the top page 254 crosses over the center of the lower side of the turning belt 208, as shown in FIG. 73, the turning belt 208 and the page separating roller 250 are operated by a solenoid (not shown). , To the position indicated by the solid line in FIG. As a result, only the uppermost page 254 of the book document BO is adsorbed on the surface of the turning belt 208 by the attraction force due to the non-uniform electric field of the charge pattern formed on the surface of the turning belt 208, and the uppermost page 254 is absorbed. The end of 254 is lifted with the turning belt 208. The attraction force due to the non-uniform electric field has a feature that pages other than the top page 254 are not attracted.

Here, the turning belt 2 in the present embodiment.
As shown in FIG. 77, the timing of charging to 08 is set such that the scanning operation of the scanning unit 200, which returns at the same time as the reading of the document surface of the book document BO, is started, and the charging of the turning belt 208 is started. Therefore, the operation of the scanning unit 200 is efficient and efficient. However, as shown in FIG. 77, the distance L1 from the document reading position of the scanning unit 200 to the lowest point of the turning belt driving roller 223 is changed from the contact point where the charging roller 225 contacts the turning belt 208 to the turning belt driving roller 223. Is greater than the distance L2 to the lowest point of (L1 ≧
When set to L2), the scanning unit 200 may be set to start the return operation and then start charging the turning belt 208 later.

As described above, after the top page 254 of the book document BO is turned up, the scanning unit 200 is moved toward the end home position as shown in FIG. 73 in this state. The top page 254 of this book original BO is shown in FIG.
4 and the page separation roller 250, the sheet is conveyed reliably, and passes between a pair of upper and lower page storage guides 227 and 228 (FIG. 62) arranged on the right side of the scanning unit 200 to pass the right side of the scanning unit 200. The tip side is sent out to the outside.
At this time, the guide section page detection sensor 214 mounted on the page storage guide 227 above the scanning unit 200.
(FIG. 62) detects the original page sent to the outside of the right side of the scanning unit 200, and determines that the original page is normally turned. As is clear from this, in the present embodiment, the original page turned up by the page turning operation of the scanning unit 200 is held in a natural posture without being rolled or bent, and thus the page is turned up. The scanning unit 200 can be miniaturized because it is not necessary to dispose the page storage means for storing the flipped original page in the scanning unit 200 without damaging the original page.

Then, as shown in FIG. 75, when the top page 254 of the book original BO is turned up to the binding portion of the book original, the turning belt 208 and the page separating roller 250 are turned on.
To the original position (the position of the broken line in FIG. 70). In this state,
When the scanning unit 200 is further moved toward the home position at the end thereof, as shown in FIG. 76, the flipped original page is pulled by the binding portion of the book original,
While returning between the pair of page storage guides 227, 228,
The book document BO is discharged from the scanning unit 200 so as to be superposed on the left page of the book document BO.

In this way, when all of the turned-up original pages are superposed on the left page of the book original BO, the scanning unit 200 completes one original reading / page-turning operation for the spread original. Here, when the document reading / page turning operation is repeatedly performed on the book document BO, or when only one of the document reading operation and the page turning operation is repeatedly performed, the book document BO is turned up as described above. When the manuscript pages are all overlaid on the left page of the book manuscript BO, the scanning unit 200
Then, the reciprocating operation of the scanning unit 200 is repeated in the shortest course with respect to the document surface of the book document.

Next, the scanning unit 20 in this embodiment.
The configuration of the 0 scan rail will be described. In the scanning unit 200, as shown in FIG. 78, the scanning optical system unit 336 in which the above-described optical system is arranged is the scanner unit 3
A pair of scanning side plates 337 arranged on the front side and the rear side of 0
a, 337b, two front support rods 34
4a and one support rod 344b on the back side are rotatably supported. Accordingly, the scanning unit 200
Is a pair of scanning side plates 33 arranged on the front side and the back side thereof.
The scanning optical system unit 336 is arranged on the front side so that the scanning optical system unit 336 is not twisted by following the relative twist of the 7a and 337b.
It is configured to learn only for 37a.

On the other hand, on the side plate of the scanner unit 30,
Two scanning rails 343a and 343b, which are parallel to each other, are disposed on the front side and the rear side of the scanning rail 343 with their left and right ends fixed. These scanning rails 343a and 343
b has a substantially L-shaped cross-section, and the roller brackets 338a and 338b surround the scanning rails 343a and 343b so as to surround the scanning rails 343a and 343b.
It is attached to each 337b. Inside the roller brackets 338a and 338b, the scanning rails 34
Positioning rollers 339a and 339b and holding rollers 340a and 340 so that the horizontal portions of 3a and 343b are sandwiched.
b and rotatably arranged.

Here, each positioning roller 339a, 339
Reference numeral b serves to determine the vertical position of the scanning unit 200 when reading a book original and turning the page, and two of each of the scanning side plates 337a and 337b are arranged. On the other hand, each press roller 34
0a and 340b are configured to press the horizontal portions of the scanning rails 343a and 343b from above. That is, these press rollers 340a, 340b
As shown in FIG. 79, is rotatably supported by a free end portion of a pressing roller bracket 346 formed in a substantially bell crank shape. The center portion of the pressing roller bracket 346 is rotatably supported by the stud 347 fixed to the roller brackets 338a and 338b. Further, between the base end portion of the pressing roller bracket 346 and the roller brackets 338a and 338b, the pressure spring 3 is provided.
Forty-five have been hung. As a result, the pressure spring 345
The pressing roller 340a, 340b presses the horizontal portion of each scanning rail 343a, 343b from the upper side by the tightening force of.

By pressing the pressing rollers 340a and 340b against the horizontal portions of the scanning rails 343a and 343b, the scanning unit 200 and the scanner unit 30 are pressed.
Of the scanning unit 339a and 339b are brought into contact with the lower surfaces of the horizontal portions of the scanning rails 343a and 343b by the displacement habit of the scanning unit 339a and 339b. 200 is positioned. In addition, this scanning unit 20
0 is a lateral pressing roller 341 that is rotatably supported by a roller bracket 338a on the front side, and the above-mentioned pressing rollers 340.
A horizontal pressure roller 342 that presses the roller bracket 338b on the inner side inward by a pressure structure similar to that of a and 340b is arranged so that the horizontal portions of the scanning rails 343a and 343b are sandwiched from both outsides. By
Positioning is performed in the depth direction.

The structure and operation of the page turning unit according to the embodiment of the present invention will be described below. The page turning portion of this embodiment is
A book original page adsorbing means for adsorbing and lifting the uppermost page of the book original that is opened and placed; a book original page separating means for separating extra pages adsorbed by the page adsorbing means; And a page turning section page detecting means for detecting the presence or absence of the generated page.

The turning belt 208 in this embodiment is
It is made of a resin film having a two-layer structure, and its material is made of PET, PC, PVC, fluororesin, etc., the surface layer is a high resistance layer with a surface resistance of 10 ¹⁴ Ω or more, and the back surface layer is a surface resistance 10 ⁸ Ω It is composed of the following low resistance layers. Further, the turning belt 208 of this embodiment is similar to that shown in FIGS.
As shown in FIG. 2, a turning belt drive roller 223 that drives the turning belt 208 to rotate, and a belt support member (turning roller 22) that supports the turning belt 208.
4) and 2 are arranged in parallel and stretched.

The turning belt drive roller 223 is constituted by a roller in which the surface of a grounded metal roller is coated with conductive rubber, and realizes reliable belt drive and grounding. The turning belt drive roller 223 is configured to rotate and drive the turning belt 208 so that the linear velocity of the turning belt 208 becomes equal to the moving speed of the turning portion. The charging roller 225 is composed of a metal roller or a metal roller coated with rubber having a surface resistance of 10 ⁸ to 10 ¹¹ Ω, and while driving the turning belt 208, the charging roller 225 is adjusted at a timing described later. 225 through the changeover switch 253a,
By applying a high voltage of ± 2 kV from the AC power supply 253, an alternating electric field is generated on the surface of the turning belt 208 to generate a page attraction force for the book original on the turning belt 208.

By the way, in FIG. 70, the structure in which an alternating electric field is applied to the turning belt 208 by one charging roller 225 is shown, but as the electric field forming means of this embodiment, FIG.
Like the charger 225A shown in FIG. 0, the two charging members are the spiral or stepped groove-shaped charging roller 225a arranged on the side close to the turning belt driving roller 223 and the cylindrical charging roller 225b similar to the above. It may be configured to use rollers. In FIG. 80, when a high voltage is applied to each of the charging rollers 225a and 225b from DC power sources having different polarities, an alternating electric field is generated on the surface of the turning belt 208, and when a page of a book document comes in, an attractive force is generated. Occurs. Further, in FIG. 80, the page-turning-section page detection sensor 290 is arranged in the vicinity of the page-turning roller 224 to detect the presence or absence of a page attracted to the page-turning belt 208 when the page-turning belt 208 is lifted. ing.

The page separating roller 250 is a turning belt 208.
When the page is sucked up and lifted, the driving means (not shown) stretches it around the turning roller 224 and presses it against the lower surface of the folding belt 208. This page separation roller 250
The pressure contact position of the belt is such that the direction of the normal of the contact is turned.
It is a position that substantially coincides with the page suction surface (lower surface) of 8 and is downstream of the page detection position. The page separation roller 250 is shown in FIG.
As shown in FIG. 1, the drive rack 23 fixed to the apparatus main body
By sliding the page turning portion with respect to 1, the idle gear 291 meshed with the drive rack 231 and
The torque limiter 2 in which the idle gear 291 meshes
Through 92, the pages are attracted to the turning belt 208 and are rotationally driven in a direction that prevents the pages from entering the page storage guides 227 and 228.

The torque force during rotation of the page separating roller 250 is 2 between the turning belt 208 and the page separating roller 250.
When more than one page has entered, it rotates in a direction that prevents the entry of extra pages, and when one page enters between the turning belt 208 and the page separating roller 250, the force to enter this page. It is managed to lose and be accompanied by. here,
As another page separating method, the torque limiter 292 is fixed, and the two between the turning belt 208 and the page separating roller 250.
When more than one page has entered, the rotation of the page separating roller 250 is stopped so as to prevent the extra page from entering, and the turning belt 2
When one page enters between the 08 and the page separating roller 250, it is possible to manage so that the page loses the entering force of this page and rotates together.

Further, the page separation roller 250 in this embodiment is also used.
As shown in FIG. 82, a portion of the turning roller 224 corresponding to the page separating roller 250 is formed of a friction member 224a such as an elastomer. Here, page separation roller 2
If the friction coefficient of both 50 and the friction member 224a with respect to the original page is too large, the page separation performance deteriorates. Therefore, in this embodiment, the page separating roller 250 and the friction member 224 are used.
The difference in friction coefficient with a was set to within ± 0.6 so as not to interfere with page separation. Here, it goes without saying that the page separating roller 250 and the friction member 224a may be made of the same material. Further, as shown in FIG. 82, the turning roller 2
By making the outer diameter B of the friction member 224a corresponding to the 08 page separation roller 250 larger than the outer diameter A of the turning belt 208, the stress applied to the page at the time of page separation can be reduced, and it is effective for protecting the original. There is.

On the other hand, in this embodiment, the page conveying roller 293 and the pressure roller 29 which rotate in pressure contact with the entrances (page insertion portions) of the page storage guides 227 and 228 behind the page separating position described above.
4 are provided, and the page conveying roller 293 and the pressure roller 294 are provided.
Is configured to convey pages into the page storage guides 227 and 228. The page transport roller 293 is formed of a soft resin such as urethane foam or rubber. Further, behind the page conveying roller 293, a guide section page sensor 214 for determining whether or not the page is normally turned is arranged (FIG. 80).

By the way, since the original page has a large curvature in the vicinity of the binding portion of the book original, when the turning portion of the scanning unit moves to the vicinity of the binding portion of the book original, the original page turned over as described above is It slackens by the amount of curvature. Therefore, in the present embodiment, in order to solve this problem, the page transport speed of the page transport roller 293 is set to be slightly higher than the moving speed of the turning portion of the scanning unit so that the slack of the page near the binding portion is eliminated. It is configured to absorb.

Further, in this embodiment, when the page stored in the page storage guide is discharged, the driving of the page conveying roller 293 is shut off so that the page can be discharged smoothly. A one-way clutch is used as a method of shutting off the drive of the page transport roller 293. Further, as another discharging method for smoothly discharging this page, the pressure roller 294 may be separated from the page conveying roller 293 at the time of discharging the page.

Next, the page turning operation of this embodiment will be described with reference to FIG.
This will be described based on the velocity diagram and timing chart shown in FIG. 8 and the flow chart of the turning operation shown in FIG.
When the document reading operation is started, the scanning unit 200, which was at the left end home position of the scanner unit 30, starts traveling in the right direction and reads the document surface of the book document BO from the left page to the right page. Go. In this way, when the optical system of the scanning unit 200 finishes reading up to the edge of the right page of the book document BO, the document scanning direction of the scanning unit 200 is reversed, and the page turning of the right page of the book document BO after this reading is completed. The operation is started. In this embodiment, page turning is performed at a speed of 120 mm / sec. At this time, the reverse direction of the scanning direction of the scanning unit 200 is maintained, and the flat portion of the lower surface of the turning belt 208 is maintained in a horizontal state by a driving unit (not shown). In this state, the high voltage power source is turned on and the charging roller 225a. , 225b by applying a voltage to the scanning unit 200 in the turning scanning direction to form a charging pattern on the turning belt 208.

Further, at the same time as the start of the turning scan, the reading of the original plate of the book original is started and the position of the end of the book original is determined. Here, in order to distinguish the edge of the book document from the document table, the document table is black in this embodiment. After detecting the edge of the book document, the scanning unit 200
Is moved by a predetermined distance, the page end of the book original is adsorbed by an appropriate length on the lower surface of the horizontally turning turning belt 208, and the scanning unit 200 is temporarily stopped. At this time, in order to form a charging pattern on the lower surface of the turning belt 208 that attracts pages, the scanning unit 200
Belt driving roller 223
Distance L1 from the contact point where the charging roller 225 is in contact with the turning belt 208 to the lowest point of the turning belt drive roller 223 (L1
≧ L2) is set. Here, if the relationship between the lengths of L1 and L2 is opposite, charging may be started from the latter half of the reading scan.

In this way, the turning belt 208 is lifted while the end portion of the uppermost page is attracted to the lower surface of the turning belt 208. At this time, the accuracy of the above-mentioned document edge detection is poor, and as shown in FIG.
There is a possibility that the position of lifting up is too close to the binding part of the book document. In such a state, when the page-turning scanning is continued, the adsorbed page is stored in the page storage guides 227, 2
If it does not enter inside 28, the document page is broken or torn and the document is damaged. Therefore, in the present embodiment, the presence or absence of a page that has been turned over is detected by using the page-turning-section page detection sensor 290, which is disposed near the turning roller 224 in a state where the turning belt 208 is lifted, and the original is prevented from being damaged.

As shown in FIG. 84, when the page-turning-section page detection sensor 290 detects a page, it is determined that the page-turning is defective and the turning-up operation is interrupted. The scanning unit 200 is scanned in a direction opposite to the flip scanning direction. Then, during the scanning, if the turning-page page detection sensor 290 can detect the edge of the turned-up page, the turning belt 2 is detected from the detected position.
The position at which 08 is lifted is calculated and stored again, and the position is returned to the turning scanning start position. After that, the turning scan is restarted, the scanning unit 200 is stopped at the position where the stored turning belt 208 is lifted, and the same turning scan is performed. Further, the scanning unit 200 is caused to scan in the direction opposite to the turning scanning direction, and if the turning page detection sensor 290 cannot detect the end of the turned-up page during this scanning, it returns to the turning scanning start position. , Turn over the scan again.

[0178] Turning belt 2 with the top page adsorbed
When the page is not detected by the page-turning section page detection sensor 290 when the 08 is lifted, it is determined that a normal turning operation is in progress, and after stopping for about 0.5 seconds, the scanning unit 200 is turned in the turning direction. Start scanning. The page turning speed at this point is 40 mm / s in order to ensure the page separation operation.
ec.

After that, if the page is adsorbed on the turning belt 208 while the turning scanning is proceeding for a certain distance, the page end should enter the turning part page detection sensor 290 and the page end should be detected. is there. Here, the certain distance is the length from the position where the turning belt drive roller 223 is in contact with the plane of the book document to the position detected by the turning page page detection sensor 290. In addition, the minimum document is defined such that the length from the binding portion to the page edge is equal to or greater than the above length. When the page edge is detected within this distance, the page separating roller 250 is brought into pressure contact with the friction member 224a of the turning roller 224 at this timing by a driving unit (not shown).

In this embodiment, the distance from the detection position of the page edge to the separation position is 10 mm, and the length of actual page separation is 2 mm.
It is set to 0 mm. After that, by a driving means not shown,
The page separation roller 250 is separated from the turning belt 208. This is because even if a large number of pages are inserted between the page separation roller 250 and the lower surface of the turning belt 208 and separated as shown in FIG. This is because the leading edge of the separated page remains between the page separating roller 250 and the lower surface of the turning belt 208 and breaks the separated page.

Further, the page edge portion has a page-turning portion page detection sensor 29.
If the page edge is not detected without entering 0, for example, as shown in FIG.
As shown in 7, when the turning position is too close to the end of the document, the pages are not attracted to the turning belt 208, it is judged that the turning is defective, the turning scanning is interrupted, and the turning scanning start position is reached. The scanning unit 200 is returned and the same turning scan is performed again.

At the time when the end of the page is detected and the page separation is completed while advancing the predetermined distance, the scanning unit 200
The page-turning scanning speed is returned to 120 mm / sec, and only one separated page is guided into the page storage guides 227 and 228. Then, the end of the page is detected by the guide section page detection sensor 214 behind the page storage guide, and 2 is detected based on this detection position.
The turning stop position of the first page is determined and stored.

When the page-turning scanning further progresses, the stored pages start to be discharged from the page storage guides 227 and 228 from the vicinity of the center of the original binding portion, and when the page end portion of the guide portion page detection sensor 214 is detected again. It is confirmed that the page turning operation is completed. After that, the scanning unit 200 moves to the reading start position and starts reading scanning of the second original page.

[0184]

According to the present invention, only the uppermost page can be reliably separated and turned over, and the possibility of original damage can be detected in advance to prevent original damage, and pages of book originals can be prevented. Turning reliability is improved.

[Brief description of drawings]

FIG. 1 is a data flow block diagram in a TPS system in which the present invention is implemented.

FIG. 2 is a flowchart of scanner data processing in the TPS.

FIG. 3 is a fluorescent lamp dimming circuit diagram of a scanning unit in the TPS.

FIG. 4 is another fluorescent lamp dimming circuit diagram of the scanning unit in the TPS.

FIG. 5 is a diagram showing an exposure light amount of a fluorescent lamp at a normal time of a scanning unit in the TPS.

FIG. 6 is a diagram showing the exposure light amount of the fluorescent lamp when the binding unit light amount of the scanning unit in the TPS is increased.

FIG. 7 is a diagram showing a change in exposure light amount of a fluorescent lamp with respect to a book document thickness of a scanning unit in the TPS.

FIG. 8 is a diagram showing an exposure light amount of the fluorescent lamp of the scanning unit when the light amount is increased asymmetrically in the book document binding portion in the TPS.

FIG. 9 is a diagram showing an exposure light amount of a fluorescent lamp of a scanning unit when the light amount is gradually changed asymmetrically in the book document binding portion in the TPS.

FIG. 10 is an amplifier circuit for scanner data in the TPS.

FIG. 11 is a transition diagram of the left end portion of the book document displaced by the page turning of the scanning unit in the TPS.

FIG. 12 is the TP when the book document binding portion is moved.
6 is a transition diagram of the left end portion of the book document displaced by the page turning of the scanning unit in S. FIG.

FIG. 13 is a transition diagram of the left end portion of the book original displaced by the page turning of the scanning unit in the TPS when the book original binding portion is thin.

FIG. 14 is a diagram of the read data at the end of the book document of the scanning unit.

FIG. 15 is a partially enlarged side view of an end portion of the book document.

FIG. 16 is a timing chart of book document mode operation in spread output / 1 to 1 copy mode in the TPS.

FIG. 17 is a timing chart of the book document mode operation in the TPS independent page output / 1 to 1 copy mode.

FIG. 18 is a timing chart of a book document mode operation in the TPS independent page output / two-copy mode.

FIG. 19 is a timing chart of a conventional book document double-sided mode operation for comparison with the book document mode operation in the TPS.

FIG. 20 is a timing chart of a book document mode operation in the 1 to 1 high speed duplex mode in the TPS.

FIG. 21 is a block diagram of drive control means of the TPS.

FIG. 22 is a schematic side view of a document table unit in the TPS.

FIG. 23 is a schematic plan view of a book document table in the TPS.

FIG. 24 is a schematic plan view of a document table unit in the TPS.

FIG. 25 is a schematic perspective view of a size stopper that positions the left and right document trays of the document tray unit according to the book document size.

FIG. 26 is a schematic plan view of the size stopper.

FIG. 27 is a schematic perspective view of a unit opening / closing lock mechanism for opening / closing the scanner unit with respect to the original table unit of the TPS.

FIG. 28 is a schematic side view of the unit opening / closing lock mechanism.

FIG. 29 is a schematic perspective view of a document table pressure fixing switching device in the document table unit.

FIG. 30 is a schematic sectional view of the platen pressurization / fixing switching device.

FIG. 31 is a perspective view of a component of the platen pressurization / fixing switching device.

FIG. 32 is a schematic perspective view of a drive unit of the platen pressurization fixation switching device.

FIG. 33 is a schematic plan view of the platen pressurizing / fixing switching device.

FIG. 34 is a schematic cross-sectional view showing an overall configuration of a device body in the TPS.

FIG. 35 is a schematic side view of the TPS during a downward retracting operation of the document table.

FIG. 36 is a timing chart at the time of the document table lower retracting operation in the TPS.

FIG. 37 is a transition diagram at the home position of the scanning unit in the pressure / fixing operation mode of the document table.

FIG. 38 is a transition diagram at the image reading start position of the scanning unit in the pressure / fixing operation mode of the document table.

FIG. 39 is a transition diagram at a book document center point of the scanning unit in the pressure / fixing operation mode of the document table.

FIG. 40 is a transition diagram during image reading of the right page of a book document or turning of the right page of the scanning unit in the pressure / fixing operation mode of the document table.

FIG. 41 is a transition diagram at the image reading completion position or the page turning start position of the scanning unit in the pressing / fixing operation mode of the document table.

FIG. 42 is an operation timing chart of the scanner motor and the left and right document table raising / lowering motors in the pressure / fixing operation mode of the document table.

FIG. 43 is an exploded perspective view showing a configuration of a slider for detecting the thickness of a book document placed on the document table and the page difference between left and right opened pages.

FIG. 44 is a schematic perspective view showing the configuration of a pin, a rack, and the like of the detection input unit in the slider.

FIG. 45 is a diagram for explaining driving of the pins of the detection input unit in the slider.

FIG. 46 is a schematic perspective view showing a positional relationship between the rack and a large gear in the slider.

FIG. 47 is a schematic cross-sectional view showing a configuration of a pin, a rack, and the like of a detection input unit in the slider.

FIG. 48 is a schematic side view showing a positional relationship between the pins, the rack, and the like of the slider and the left and right document stands.

FIG. 49 is a schematic side view showing a positional relationship between a large gear and a slide output gear in the slider.

FIG. 50 is a schematic side view showing the positional relationship between the two-stage pinion gear and the cam gear in the slider.

FIG. 51 is a schematic perspective view showing a positional relationship between a large gear and a slide output gear in the slider.

FIG. 52 is a schematic plan view showing a positional relationship among a slide output gear, a cam gear, and an output pin in the slider.

FIG. 53 is a schematic perspective view showing a positional relationship among a slide output gear, a cam gear, and an output pin in the slider.

FIG. 54 is a schematic side view showing the attachment position of the horizontal slide plate with respect to the slide side plate in the slider.

FIG. 55 is a schematic side view showing the attachment positions of the horizontal slide plate and the pin holder with respect to the fixed plate in the slider.

FIG. 56 is a schematic side view of a binding portion of a book document set on the document table.

FIG. 57 is a schematic side view showing the positional relationship among the pins of the slider, the large gears, the slide output gears, and the output pins when the spine cover of the book document set on the document table is horizontal.

FIG. 58 is a schematic side view showing the positional relationship among the pins of the slider, the large gears, the slide output gears, and the output pins when the spine of the book original set on the original table is tilted.

FIG. 59 is a schematic side view showing a configuration of a motion transmitting mechanism of the detection input unit and the output unit of the slider.

FIG. 60 is a schematic perspective view showing another moving means of the document table.

FIG. 61 is a schematic plan view showing a driving mechanism of a scanning unit in the scanner unit.

FIG. 62 is a schematic sectional view of a scanning unit in the scanner unit.

FIG. 63 is a schematic cross-sectional view showing the structure of the sheet winding roller of the scanning unit.

FIG. 64 is a schematic side view showing a drive mechanism of a sheet winding roller and a turning roller of the scanning unit in the scanner unit.

FIG. 65 is a schematic cross-sectional view showing the positional relationship between the document pressing roller and the platen glass of the image reading section in the scanning unit.

FIG. 66 is a schematic cross-sectional view showing the positional relationship between the platen glass and the glass holder of the image reading section in the scanning unit.

67 is a schematic side view of a switching mirror driving means and an optical path adjusting means for switching the optical path of the scanning optical system in the scanning unit from the book document scanning side to the sheet material document scanning side. FIG.

FIG. 68 is a schematic cross-sectional view of the scanning unit in a state where the switching mirror is driven to switch the optical path of the scanning optical system in the scanning unit from the book document scanning side to the sheet document scanning side.

FIG. 69 is a schematic sectional view of a scanning unit showing another driving means of the switching mirror.

FIG. 70 is a schematic cross-sectional view of the main parts of the scanning unit, showing the page turning operation of the scanning unit in the TPS.

71 is a transition diagram at the left page image reading position of the scanning unit in the page turning operation mode of the scanning unit. FIG.

72 is a transition diagram at the right page image reading completion position of the scanning unit in the page turning operation mode of the scanning unit. FIG.

FIG. 73 is a transition diagram at the right page-turn-up start position of the scanning unit in the page-turning operation mode of the scanning unit.

FIG. 74 is a transition diagram of the scanning unit during the right page turning in the page turning operation mode of the scanning unit.

FIG. 75 is a transition diagram at the right page turning end position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 76 is a transition diagram of the scanning unit in the course of discharging the right page in the page turning operation mode of the scanning unit.

FIG. 77 is an explanatory diagram of the charging timing of the image reading unit and the turning belt at the right page image reading completion position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 78 is a schematic side view showing a support structure of the scanning unit with respect to the scanner unit.

FIG. 79 is a schematic side view showing the relationship between the scanning rail and the pressing roller of the supporting mechanism of the scanning unit with respect to the scanner unit.

FIG. 80 is a schematic side view of an embodiment of a page turning apparatus for book originals according to the present invention.

81 is a schematic perspective view of the page turning portion in the above-described embodiment. FIG.

82 is a schematic cross-sectional view of the page turning means of the above embodiment. FIG.

83A and 83B are a velocity diagram and a timing chart at the time of page turning operation in the above-described embodiment.

84 is a flow chart of the page turning operation of the above embodiment. FIG.

FIG. 85 is a schematic side view showing a defective operation aspect at the time of page turning operation in the above-mentioned embodiment.

FIG. 86 is a schematic side view showing another defective operation aspect at the time of page turning operation in the above embodiment.

FIG. 87 is a schematic side view showing still another defective operation aspect at the time of page turning operation in the above-mentioned embodiment;

[Explanation of symbols]

 1 Document Platen 30 Scanner Unit 35 Document Platen Unit 116 High Voltage Power Supply 117 Turning Belt Vertical Solenoid 118 Turning Page Sensor 200 Scanning Unit 205 Platen Glass 208 Turning Belt 214 Guide Section Page Detection Sensor 223 Turning Belt Drive Roller 224 Turning Roller 224a Friction Member 225 225a, 225b Charging rollers 227, 228 Page storage guide 231 Drive rack 250 Page separation roller 290 Turning section Page detection sensor 291 Idle gear 292 Torque limiter 293 Page feeding roller 294 Pressing roller BO Book original BOa Book original binding section

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H04N 1/107

Claims (9)

[Claims] 1. A page turning of a book document, which comprises a document table on which a book document is placed, and an operation unit having a function of scanning and moving the book document opened and placed on the document table to turn the page. In the apparatus, a plurality of belt-shaped members formed of dielectric sheets and arranged in parallel, and a belt supporting means for rotatably supporting the belt-shaped members so as to form a flat portion on the lower surface of the belt-shaped members. A belt driving means for rotating the belt-shaped member so that the lower surface of the belt-shaped member supported by the belt-supporting means moves in the same direction as the scanning direction of the book document; An electric field forming means for forming an electric field, a first position in which the lower surface flat portion of the belt-like member is brought into contact with the uppermost page of the book document, and the uppermost page is attracted to the lower surface flat portion, and the lower surface flatness. And a belt-shaped member moving means for moving the belt-shaped member to and from a second position for accommodating the uppermost page adsorbed by the section, and forming a page adsorbing means for the book document, and forming a friction in a cylindrical shape. A member, a friction member moving means for urging the friction member so as to contact the belt supporting member of the belt supporting means at the second position and separating the friction member from the belt supporting member at the first position, and the second position. When a large number of pages are inserted between the belt-shaped member and the friction member, the rotation of the friction member is stopped or reversely rotated with respect to the page conveying direction, and only one page is inserted. And a friction member rotating unit that rotates the friction member in the page conveying direction, forms a page separating unit for the book document, and determines whether or not there is a page attracted to the belt-shaped member at the second position. Page turning apparatus of a book document, characterized in that it comprises a turning unit page detection means for output. 2. A page turning apparatus for a book manuscript, comprising a page suction means for a book manuscript, a page separating means, and a page turning part page detecting means according to claim 1, wherein the page detecting position of the turning part page detecting means is: 2. The page turning device for book originals according to claim 1, wherein the position is set at a position rearward of the belt-shaped member on the downstream side in the turning scanning direction of the scanning unit. 3. A page turning apparatus for a book original, comprising the page suction means for the book original, the page separating means, and the page turning section detecting means, according to claim 1, from the first position when the scanning unit is stopped. A book characterized by displacing the belt-shaped member to the second position, and detecting the presence or absence of pages adsorbed on the belt-shaped member by the page-turning-section page detecting means within the subsequent stop time of the scanning unit. A page turning device for manuscripts. 4. When the page adsorbed on the belt-shaped member is detected by the page-turning-section page detecting means within the stop time of the scanning unit according to claim 3, it is judged that the page-turning is defective and the scanning unit is detected. A page turning apparatus for book manuscripts, characterized in that the page turning operation is stopped. 5. The page turning operation of the scanning unit is stopped when it is determined that the page turning is defective, and the belt-shaped member is held at the second position to set the scanning unit in the turning scanning direction. While detecting the page end portion by the turning portion page detection means while moving in the opposite direction, the belt-shaped member is stopped to measure the position where the page end portion is detected from the position where the page is adsorbed, A page turning apparatus for book manuscripts characterized in that page turning is rescanned using the measured distance. 6. When the page adsorbed on the belt-shaped member is not detected by the page-turning-section page detecting means within the stop time of the scanning unit according to claim 3, the scanning unit is turned over in the scanning direction. The page edge portion is detected by the page turning portion page detecting means while moving to the page, and when the page edge portion is detected by the page turning portion page detecting means, the detection timing of the page edge portion is used to detect the page edge portion. A page turning apparatus for book originals, wherein a friction member of a page separating means is urged into contact with a belt supporting member to separate pages. 7. When the page adsorbed on the belt-shaped member is not detected by the page-turning-section page detecting means within the stop time of the scanning unit according to claim 3, the scanning unit is turned over in the scanning direction. And the page end of the page is detected by the turning page detecting means while the scanning unit is moving a predetermined length, and when the page end is not detected by the turning page detecting means, the page turning is performed. A page turning apparatus for book originals, which is judged to be defective, interrupts the page turning operation of the scanning unit, returns the scanning unit to the initial position of the page turning operation, and performs the same page turning operation again. 8. The moving distance of the scanning unit when the friction member of the page separating means is urged into contact with the belt supporting member at the timing of claim 6 to separate the pages is set in the scanning direction of one page of the minimum document. 2. The page turning device for book originals according to claim 1, wherein the friction member which is less than the length and is thereafter urged into contact with the belt supporting member is separated from the belt supporting means. 9. The turning speed of the scanning unit when the friction member of the page separating means according to claim 8 is urged into contact with the belt supporting member to separate the pages, and the scanning speed of the scanning unit other than when the pages are separated is determined. 2. The page turning device for book originals according to claim 1, wherein the page turning device is slower than the scanning speed.