JP3311374B2 - Book manuscript reading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a book document reading apparatus such as a copying machine and a facsimile.

[0002]

2. Description of the Related Art An apparatus and a method for reading a book original include the following: (1) The original surface of a book original placed and opened upward on an original support table is brought into contact with an upper contact glass, and the contact glass is sandwiched. A device for exposing and scanning an original image by scanning of a scanning optical system disposed opposite to
(2) There is known a device for reading an original image by exposing the original surface of a book original placed and spread upward on the original placing surface by a contact type reading sensor.

On the other hand, as a document reading device in a copying machine, a facsimile or the like, a sheet document is automatically conveyed to a document reading position to read document information, and a read document is automatically discharged from the document reading position. An automatic document feeder (ADF) is known.

As described above, when the original is a sheet original, the ADF is mounted to automatically read the original information. However, when the original is a book original, automatic page turning is performed. for realization of the mechanism it is difficult on the fact, at the present stage, there is the turning pages of the book document the situation that can not be done only manually.

Conventionally, in view of the current situation, various proposals have been made for methods and means for automating time-consuming reading of a book document.

An apparatus and method for automatically turning a page of a book document which is indispensable for realizing the automatic reading of the book document include (3) moving the book document which is placed downward and opened while moving the document page. A device for sucking and separating, (4) a device for sucking and separating document pages of a book document placed facing upward and opened, (5)
There is known a device for turning an original page of a book original placed and opened upward with a roller, an arm, or the like.

[0007] However, the above-mentioned prior art has many proposals only with ideas, has not yet reached a level that can be realized, and has the following problems. That is,
(1) The original surface of a book original placed and opened upward on an original support table is brought into contact with an information contact glass, and the original image is exposed by scanning of a scanning optical system opposed to the contact glass. In a scanning device, it is necessary to move the book document from the position where the document page of the book document is turned to the position where the exposure scanning is performed, which lowers the document exposure scanning efficiency and inevitably increases the size of the device. Was.

(2) An apparatus for reading an original image by exposing and scanning the original surface of a book original placed and opened upward on the original mounting surface by a contact type reading sensor is called an enlargement of the apparatus. Although the point can be solved, since there is no means for pressing the manuscript surface of the book manuscript, there is a problem that the placed manuscript surface is easily lifted and reading scanning of the manuscript surface becomes unstable.

On the other hand, (3) in a device that sucks and separates the original pages while moving a book original placed downward and opened, the reliability of page turning is impaired due to the weight of the book original. In addition, there is a risk that the document surface may be rubbed when the page is turned and the document may be damaged, and furthermore, there is a problem that the size of the apparatus must be increased due to its configuration.

[0010] (4) a device for sucking and separating the original pages of a book original placed upward and opened, and (5) a roller, an arm, etc. for separating the original pages of the book original placed upward and opened. In a flipping device or the like, the conventional page separation mechanism that moves in the upper space of the book document is complicated and large, and thus there is a problem that it is unavoidable to increase the size of the device.

In view of the above situation, the applicant of the present invention has disclosed, for example, Japanese Patent Application No. 2-193589, which discloses a page holding belt stretched along a document placing surface of a document placing table. A page storage means is provided for a document surface of a book document placed and opened between the document mounting surface and the page holding belt while forming a detour portion which is partly separated from the document mounting surface. , A page adsorbing unit, a page separating unit, a reading unit, and the like are relatively moved, so that a book document page turning reading device (hereinafter, referred to as a book document) for turning over the book document and performing document scanning. MFD
S).

According to the MFDS according to this proposal, as described in the above specification and the like, it is possible to completely automate the page turning operation of a book document and the document reading scan, which required a great deal of labor for copying and the like. As a result, it is possible to realize a multi-function original reading system that significantly improves the productivity of copying and the like.

[0013]

By the way, the aforementioned MF
Since the DS has a function of automatically performing reading scanning of the document information of the book document and turning over the document pages, by connecting this MFDS to a printer,
Copies of books and magazines can be made at high speed without human intervention. However, the MFDS proposed earlier
In this case, since the reading means is constituted by an equal-magnification optical system using a contact type sensor, there is a problem that the page turning reading unit becomes large. Further, in this MFDS, since the page storing means and the reading means are arranged side by side in the vertical or horizontal direction,
There was a problem that the page turning reading unit was further enlarged. The present invention has been made in view of the above points, and an object of the present invention is to provide a book document reading apparatus that can achieve downsizing of the apparatus.

[0014]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a document table and a document surface for exposing a document page of a book document placed on the document table and opened. Reading / scanning means having an exposing means, a condensing means for condensing light reflected from the document surface exposed by the exposing means, and a photoelectric conversion means for photoelectrically converting the light condensed by the condensing means. Document pressing means for pressing at least a part of the document surface of the book document other than the portion facing the document exposure unit by the exposure means toward the document table; and a page for turning over the document pages of the book document means turning the upper Symbol focusing means, of the photoelectric conversion means being configured to surround at least one, to house the document pages turned by the page turning means
A configuration that includes a Lupe over di storing means.

[0015]

According to the present invention, the reflected light from the original surface exposed by the original surface exposing means for exposing the original surface of the book original spread and placed on the original placing table is transmitted to the condensing means. , And are photoelectrically converted by the photoelectric conversion means. Further, page turning turned the document pages by means, top Symbol focusing means, of the photoelectric conversion means, so as to surround at least one, is housed in the upper Kipe over di housing means.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. However, the configuration and operation of the range that can be clearly recalled from the description of the present specification, and the above and other objects and novel features of the present invention are omitted from illustration and disclosure in order to avoid complication of description. Or simplify it.

Prior to the description of the embodiment of the present invention, the configuration and operation of the above-mentioned MFDS (book page turning reading apparatus) in which the present invention is implemented will be described.

As shown in FIG. 2, a book document page turning and reading apparatus “multi-function document scanner (hereinafter, referred to as“ MFDS ”)” in which the present invention is carried out, as shown in FIG. A document placing table 100 on which a document is to be placed, and a page pressing belt 200 stretched along a document placing surface 100a of the document placing table 100.
Then, a part of the page press belt 200 is separated from the document placing surface 100a, and the bypass section 20 is connected to the page press belt 200.
A detour section forming means 300 for forming the first scanning line 0a, the reading section 400a disposed on the side of the detour section 200a in the document reading scanning direction (the direction of arrow a) with the reading section 400a facing the document placing surface 100a, and the detour section The page storage opening 500a is opened in the page turning direction (the direction of the arrow b) opposite to the original reading scanning direction of the document 200a, and the reading means
Page storage means 500 and a page pressing belt 200 which are arranged in parallel to
The page holding belt 200 is charged with an uneven electric field.
Suction means 6 for sucking pages of book document O
00, and the page storage port 50 of the page storage means 500
A page separating means 700 for separating a document page adsorbed on the page pressing belt by a curvature according to a curvature of the page pressing belt 200 at a portion opposed to the document holding surface 0a, and a page supported so as to be reciprocally movable along the document placing surface 100a. It is composed of a turning-over reading unit 1.

As shown in FIG. 3, the main structure of the MFDS has a front open shell type opening / closing structure in which the rear portions of the upper unit 2 and the lower unit 3 are fixed by hinges 4. The upper surface of the lower unit 3 is the document placement surface 10
0a.

The book document O is set by fitting the binding portion into a center groove 100b formed in the center of the document placing surface 100a and opening the book unit O with the upper unit 2 opened. Therefore, in the MFDS, it is not necessary to set the book original face down with the facing pages facing down as in a conventional copier, and the book original can be set very efficiently and easily.

On the other hand, the page holding belt 200 and the page turning reading unit 1 are disposed in the upper unit 2, and the magnet 3 a of the lower unit 3 attracts the magnetic plate 2 a of the upper unit 2, and the upper unit 2 2 are closed to the original surfaces of the book originals O, respectively. The page turning reading unit 1 is reciprocated with the upper unit 2 closed as described above, and moves forward as indicated by reference numerals 1A, 1B, 1C and 1D in FIG. When moving in the direction,
The reading unit 400 scans the document surface of the book document O to read the document image, and FIG.
F, 1G, and 1H, when moving in the page turning direction shown by arrow b,
00, the page separation unit 700 and the page storage unit 500 execute page turning of the book document O.
The drive mechanism and drive control means of the page turning reading unit 1 have been described in detail in the above-mentioned prior application, and thus description thereof will be omitted.

In the MFDS of the prior application, since the page storage means and the reading means are arranged side by side in the horizontal direction, the page turning reading unit becomes large, and the reading means becomes the same size. There is a problem that the reading accuracy is reduced because the optical system is used.

Therefore, according to the present invention, as a reading means of a book document, a small-sized reading sensor is used to turn a plurality of times by a mirror to form a small optical system, thereby improving the reading accuracy and reading speed. In other words, the invention according to claim 1 comprises two or more mirrors, a plurality of reflection paths of the document are folded back plural times, and a small optical unit of a reduction projection type is constituted by a lens, a CCD or the like, and the reading and scanning of a spread book document is performed. And a page storage unit is formed integrally with the page turning reading unit so as to surround the reading unit. The invention according to claim 2 is characterized in that a part of the reading optical path of the reading unit intersects with the page conveying path of the page storage unit via a slit, thereby making the page turning reading unit compact. I have.
Further, the invention according to claim 3 is characterized in that a part of the reading optical path of the reading unit intersects with a page transport path of the page storage unit via a transparent member, thereby making the page turning reading unit compact. And

As described above, by using an optical system having a reduction type sensor in a book original reading apparatus,
(1) The depth of focus is increased, and the book document binding section can be read. (2) High-speed scanning becomes possible.
(3) The sensor chip is small and low cost. There are advantages such as.

FIG. 1 shows an embodiment of the present invention. Reading means 400 of the present embodiment (hereinafter referred to as reading unit)
As shown in FIG. 1, a reflected light path from a document is bent a plurality of times by two mirrors arranged in parallel with each other, and a reading sensor unit using a conventional close-contact 1: 1 sensor is made incident on a reduced CCD. It is configured by replacing it with a small reading unit.

The page pressing belt 200 is wrapped around the outer peripheral portion of the page turning reading unit 1 by supporting rollers 6, 7, 8, a turning roller 9, a separation roller 10, and a bias roller 11. . Here, the ground roller 12 is disposed in contact with the bias roller 11 with the page pressing belt 200 interposed therebetween. Further, as shown in FIG. 2, one end of the page pressing belt 200 is fixed to the structure of the apparatus, and the other end is stretched via an elastic body such as a spring. further,
Each roller of the above, the side plate of the reading unit 400 (not shown) are respectively rotatably supported, is the slave moving respectively rotated by the page turning belt 200 is displaced relative to the scanning of the reading unit 400 You.

In FIG. 1, an optical system of a reading unit 400 provided in the page turning reading unit 1 includes a fluorescent lamp 401, a pressure glass 402, and a first mirror 40.
3, second mirror 404, third mirror 405 arranged in parallel with second mirror 404, in-mirror lens 40
6, a reduction projection type optical system comprising a CCD 407 and the like. In the reading unit 400, the pressing glass 402 is in close contact with the original surface of the opened book original,
When the fluorescent lamp 401 is turned on, the original image on the book original is scanned by moving relative to the original surface. The page turning reading unit 1 rides on the book original at the time of the image scanning in the same manner as the conventional one by the operation of the page turning guides 17 and 18 arranged on both sides of the page turning reading unit 1. In this embodiment, the first mirror 403, the second mirror 404, the third mirror 405, and the in-mirror lens 406 bend the reflected light of the original image a plurality of times, and the reflected light is photoelectrically converted by the CCD 407. Thereby, a small-sized reading unit 400 is realized.

[0028] Here, the first mirror 403, a main scanning direction of the document surface is formed in a rectangular along (toward parallel to the rollers), and the second mirror 404 and third mirror 405, The lower side is substantially equal to the length of the first mirror 403, and the upper side is shorter than the lower side, and is formed in a trapezoidal shape substantially perpendicular to the document surface. Therefore, the reading unit 400 is formed in a trapezoidal shape whose front and rear surfaces are inclined inward and upward. Also, the in-mirror lens 406
It is arranged above the third mirror 405 (or the second mirror 404 is also possible) so that the position can be adjusted vertically and horizontally. Further, the CCD 407 includes an in-mirror lens 406.
Like, so that you can adjust the position in the vertical and horizontal directions,
It is provided above a sensor control board 408 which is provided on the side facing the in-mirror lens 406.

On the other hand, a pressure suction plate 13 is provided between the turning roller 9 and the separation roller 10 at a position opposed to the original surface of the book original with the page pressing belt 200 interposed therebetween. The pressure-adsorbing plate 13 is curved on the document surface side so as to have a gentle curve of about 75 R, and supports the page press belt 200 so as to be stretched. The uppermost document page of the document is sucked and guided upward, and the uppermost document page is separated from the lower page.

The uppermost document page separated from the lower page by the pressure suction plate 13 is
Is separated from the page holding belt 200 by the curvature of the page holding belt 200 of the portion stretched over the sheet, and is guided into the page storage section 501 of the page storage means 500 provided in the page turning reading unit 1.

The page storage section 501 in the present embodiment is
As shown in FIG. 1, a pair of page storage guides 502, which are formed in a track shape integrally with the page turning reading unit 1 so as to surround the reading unit 400,
503. As a result, the reading unit 4 is placed in a useless space of the bypass portion of the page holding belt 200, that is, a space inside the page storage guide 502.
Since 00 is provided, the page turning reading unit 1 can be formed small. Further, according to the present embodiment, by forming the curved portion of the page storage portion 501 loosely to about 30 R, it is possible to eliminate the overlapping of the pages when storing the pages and to reduce the sliding load of the pages when storing the pages. . Further, the inner-side page storage guide 502 has an effect of preventing dust from entering the reading unit 400 by surrounding the reading unit 400, and the outer-side page storage guide 503 has a fluorescent lamp. There is an effect that it also functions as a reflector and a heat sink of 401. Further, in this embodiment, the turning guide movable at the time of discharging the page is removed, and the stored original page is pulled on the book document surface along the arc-shaped discharge guide 503b at the lower end of the page storage guide 503. Since the sheet is configured to be discharged, a stable page discharge can be performed without causing a discharge operation failure.

When the page storage section 501 is formed so as to surround the reading unit 400 from the upstream side (left side in FIG. 1) in the page turning direction, the page storage section 501 scans the book document. When the page storage unit 501 is formed so as not to cross the optical path but to surround the reading unit 400 from the downstream side (right side in FIG. 1) in the page turning direction, the page storage unit 501 It will intersect the scanning optical path of the document. However, as described above, by forming the page storage unit 501 so as to surround the reading unit 400 from the downstream side in the page turning direction, the page storing operation of the book document can be performed without difficulty, and the reading unit 400 and the reading unit 400 can be easily read. The arrangement area with the page storage unit 501 can be shared more, and the page turning reading unit 1 can be configured to be smaller. Therefore, in the present embodiment, as shown in FIG. 1, the page storage unit 501 is formed so as to surround the reading unit 400 from the downstream side (the right side in FIG. 1) in the page turning direction. 501 intersects with the scanning optical path of the book original, and at a portion of each of the page storage guides 502 and 503 forming the page storage section 501, which intersects with the original scanning optical path.
Slits 502a and 50 for transmitting document scanning light
3a is formed. Here, as another method of transmitting the document scanning light, each page storage guide 502,
A portion intersecting the document scanning optical path 503 may be made of a light-transmissive member such as transparent plastic or glass. Thus, each page storage guide 502,5
By arranging a light transmissive member at the intersection of the document scanning optical path 03 and the document scanning optical path, document page jam does not occur when the page is stored as compared with a case where the intersection is a simple slit.

[0033]

According to the present invention, the use of an optical system provided with a reduction type sensor in a book original reading apparatus makes it possible to (1) increase the depth of focus and read a book original binding portion. (2) High-speed scanning becomes possible.
(3) The sensor chip is small and low cost. The reading unit can be configured to be small, and the page turning reading unit can be downsized by arranging the page storage unit around the reading unit.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a page turning reading unit according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a conventional multi-function document scanner (MFDS).

FIG. 3 is a schematic perspective view of the MFDS when a document is set.

FIG. 4 is a schematic diagram showing an operation mode of a page turning reading unit in the MFDS at the time of reading scanning.

FIG. 5 is a schematic diagram showing an operation mode of a page turning reading unit in the MFDS when turning a page.

[Explanation of symbols]

 1 Page turning reading unit 9 Turning roller 10 Separation roller 100 Document mounting table 100a Document mounting surface 200 Page holding belt 300 Detour section forming means 400 Reading means 401 Fluorescent light 402 Pressurized glass 403 First mirror 404 Second mirror 405 Third Mirror 406 In-mirror lens 407 CCD 408 Sensor control board 500 Page storage means 501 Page storage section 502, 503 Page storage guide 600 Page suction means 700 Page separation means O Book original

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI // G03B 27/62 (72) Inventor Kazushige Taguchi 1-3-6 Nakamagome, Ota-ku, Tokyo, Ricoh Company, Limited (72) Inventor Masaru Shiina 1-3-6 Nakamagome, Ota-ku, Tokyo, Ricoh Co., Ltd. (56) References JP-A-4-51174 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1/04-1/207

Claims (3)

(57) [Claims] An original platen; an original surface exposing unit for exposing an original surface of a book original placed and opened on the original platen; and reflected light from the original surface exposed by the exposing unit Reading scanning means having a light collecting means for collecting light, and a photoelectric conversion means for photoelectrically converting the light collected by the light collecting means; other than the portion facing section, a document pressing means for pressing at least a portion on the document table side, and the page turning means turn the document page of the book document, upper Symbol focusing means, of the photoelectric conversion means, at least It is configured to surround one, the book document reading apparatus characterized by comprising: a Lupe chromatography di housing means to house the blind a document page by the page turning means. Wherein the upper Kipe over di accommodating means has a portion intersecting an optical path of the upper Kihan Shako, claims, characterized in that a slit for transmitting the reflected light to the intersection Item 2. The book document reading device according to Item 1. Wherein the upper Kipe over di accommodating means has a portion intersecting an optical path of the upper Kihan Shako, book according to claim 1, characterized by being configured the intersection of a transparent member Document reading device.