JP2535471Y2 - Document 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 an original reading apparatus capable of reading both a sheet original and a book original.

[0002]

2. Description of the Related Art Generally, in a facsimile apparatus, a scanner unit (document reading device) for reading a document image is fixed to a main body, and only one sheet can be used as a transmission document. Only the separated sheet document.

Therefore, conventionally, when a book image is transmitted, the image cannot be read directly by a scanner unit and then transmitted, so that a copy of the image is once taken, and the copied document is set as a transmission document in a facsimile machine. doing.

[0004]

For this reason, conventionally, there has been an inconvenience that it takes time and effort to transmit such a book image.

It is conceivable that a facsimile apparatus is provided with a book scanner having a configuration like a reading system of a copying machine. However, such a book scanner is large and expensive, and cannot be applied to a small facsimile apparatus.

The present invention has been made in view of the above circumstances, and has as its object to provide a document reading apparatus capable of appropriately reading images of a sheet document and a book document.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided an illuminating means for illuminating a document, a reading means for reading an image signal by reflected light from the document, and a manual reading and scanning method incorporating the reading means and the illuminating means. A possible scanner unit, a document reading apparatus main body for detachably holding the scanner unit, a conveying means for conveying the document, and whether the scanner unit is attached to the document reading apparatus main body. Determining means for determining whether or not the scanner unit is attached to the document reading main body; and determining the drive timing of the reading means by the transport operation of the transport means. On the other hand, if the determination unit detects that the scanner unit is not attached to the document reading main body, Drive timing of intake means those having a control unit for synchronizing the manual reading scan.

[0008]

Therefore, the scanner unit configured as a handy scanner can be removed from the main body, and the image of a book can be read by manually operating the scanner unit, and the scanner unit can be mounted on the main body. Thus, the image of the sheet document can be read.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a facsimile apparatus according to an embodiment of the present invention.

In FIG. 1, a document placed on a document table 1 has its leading end pressed by a positioning plate 2 and is separated one by one from a lowermost portion by a separating unit 3.
It is sent to the transport roller 4.

The document is transported between the scanner unit 5 and the white plate 6 by the transport roller 4, and after its image is read, is discharged to a document tray 8 by a discharge roller 7.

Reference numeral 10 denotes a roll paper for recording paper, 1
1 is a recording unit, 12 is a transport roller for transporting the roll paper 10, 13 is a cutter for cutting the roll paper 10 at a timing corresponding to the size of a recorded image, and 14 is a cutter 13
And a discharge roller for discharging the roll paper 10 cut in step (1) to the receiving tray 15 as recording paper.

As shown in FIG. 2, the scanner unit 5
In the upper part of the case 51, a projecting part 52 in the longitudinal direction is formed, and the lower end of the case 51 is moved in the sub-scanning direction when the scanner unit 5 is removed to read an image of a book or the like. Wheels 53 for detecting the distance are provided. The lower end of the case 51 is formed in a shape along the circumference of the wheel 53, and a reading system including an equal-size sensor and the like is provided in the lower end of the case 51 as described later. .

On the other hand, an insertion opening 21 for accommodating the scanner unit 5 is formed on the upper surface of the main body housing 20, and a wall extending downward from the insertion opening 21 has a lower end of the overhang portion 52. The support part 22 for locking is formed.

Therefore, when the scanner 5 is inserted from the insertion opening 21 of the main body housing 20, the overhanging portion 52 of the case 51 engages with the support portion 22, thereby the scanner 5
Is attached to a predetermined reading position.

FIG. 3 shows a reading system of the scanner unit 5.

In the figure, a window 54 for reading an image is formed along the longitudinal direction of the lower end of a case 51 having the same shape as the circumference of the wheel 53. Is fitted with a protective cover 55 made of a transparent material.

LE for illuminating read lines on protective cover 55
An illumination unit 56 including a D array and a cylindrical lens,
An image forming element 58 for guiding image light from the reading line to the line image sensor 57, and a line image sensor 57 for decomposing the incident image light into pixels and outputting an image signal corresponding to each pixel, are each a block 59. Is attached to a predetermined position.

The line image sensor 57 is a so-called equal-magnification sensor in which light-receiving cells having substantially the same size as pixels are formed in a line corresponding to the pixel pitch. Line image sensor 5
7 is formed of a converging fiber array or the like.

A lighting section 56 is provided inside the case 51.
A control unit (control circuit) for controlling the operation of the line image sensor 57 is provided therein. The control unit and the main body control unit of the facsimile apparatus are connected by a cable 60 including a plurality of signal lines.

In this embodiment, the scanner unit 5 can be detached from the main body of the facsimile apparatus and can be operated independently. As shown in FIG. 4, the detached scanner unit 5 is attached to the book document BK. The image can be read by moving it up.

In this case, the line image sensor 57 is determined based on the amount of rotation of the wheel 53 rotating while contacting the book original BK.
It is necessary to detect the scanning start timing of FIG. 5, and a mechanism for that is shown in FIGS. 5A and 5B.

In the drawing, a large number of fine grooves 53a are radially formed at a predetermined pitch on the case 51 side of the wheel 53, and a pair of a light emitting element 65a and a light receiving element 65b are located at positions where these grooves 53a are detected. Photo sensor 65
Are arranged.

The pitch of the groove 53a is determined in accordance with the amount of one-step movement in the sub-scanning direction.
Each time it moves by a step, the photo sensor 65
a is detected, and a pulse signal is output.

Note that the surface of the wheel 53 is formed of a shape and material having a large friction so that the wheel 53 is surely rotated with the movement of the scanner unit 5.

As shown in FIG. 6, a window 52a is formed in the projecting portion 52 of the case 51.
A limit switch 67 for detecting whether or not the scanner unit 5 is attached to the facsimile apparatus is provided so that the filler protrudes to the outside from a.

FIG. 7 shows an example of the control unit of the scanner unit 5. In the figure, an output signal of a light receiving element 65b of a photo sensor 65 is applied to a waveform shaping circuit 71 to be waveform-shaped, and an external synchronization signal ES output from a control unit (not shown) of the facsimile apparatus is input to an input terminal B thereof. The input A of the added multiplexer 73 is applied as an internal synchronization signal IS. The output signal of the limit switch 67 is applied to a waveform shaping circuit 72 to be shaped, and a multiplexer 73 as a synchronization selection signal CS.
And input to the control circuit 74 at the same time.

The scanner unit 5 is attached to the main body of the facsimile machine, and the limit switch 67
Is ON and the synchronization selection signal CS is at the logic "L" level, the multiplexer 73 uses the external synchronization signal ES applied to its input terminal B as the synchronization signal SS as the control circuit 7
4 is output.

When the scanner unit 5 is detached from the main body of the facsimile apparatus,
Is turned off and the synchronization selection signal CS is at the logic "H" level, the multiplexer 73 uses the external synchronization signal IS applied to its input terminal A as the synchronization signal SS as the control circuit 7
4 is output.

The control circuit 74 outputs a scan start signal SC to a sensor driving section 76 for driving the line image sensor 57 based on the timing at which the synchronization signal SS is added from the multiplexer 73. The scanning of 57 is started. As a result, the image signal DP is output from the line image sensor 57 and output to a transmission unit (not shown) via the control unit of the facsimile machine.

At the start of reading, the control circuit 74 activates the light source driving section 75 to turn on the LED array of the illuminating section 56, and various state signals indicating the mounting state of the scanner unit 5 and the like to the control section of the facsimile apparatus. Output DS.

As described above, when the scanner unit 5 is attached to the main body of the facsimile apparatus, the scanner unit 5 is synchronized with the control unit of the facsimile apparatus, that is, in synchronization with the movement of the document conveyed by the conveyance roller 4. When the scanner unit 5 is detached from the main body case, the line image sensor 57 operates in synchronization with the movement of the scanner unit 5 operated by the operator.

In the above-described embodiment, a number of grooves are formed in the wheels attached to the case of the scanner unit, and the internal synchronization signal is formed by detecting these grooves with a photo sensor. The signal generating means is not limited to this. For example, on the shaft connecting the wheels,
A pulse encoder that generates two pulse signals having a phase difference of 90 degrees may be attached, and an internal synchronization signal may be formed from output pulses of the pulse encoder. In this case, the moving direction of the scanner unit can also be detected,
It is not necessary to limit the moving direction of the scanner unit.

The limit switch detects whether or not the scanner unit is attached to the main body of the facsimile apparatus. However, this means is not limited to this limit switch. Can be used.

[0036]

[Effects of the Invention] As described above, according to the present invention,
The scanner unit configured as a handy scanner can be removed from the main unit, and the image of a book can be read by manually operating the scanner unit. The advantage is that the image can be read. In addition, there is an advantage that an image of a document that cannot be directly read in the past, such as a large document, can be read.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a partial view exemplifying a mounting state of a scanner unit.

FIG. 3 is a partial cross-sectional view illustrating a reading system of the scanner unit.

FIG. 4 is a perspective view showing a reading mode of a book document.

FIG. 5 is a partial configuration diagram showing an example of a generator of an internal synchronization signal.

FIG. 6 is a partial cross-sectional view illustrating an example of an attachment determining unit of the scanner unit.

FIG. 7 is a block diagram illustrating an example of a control unit.

[Explanation of symbols]

 5 Scanner Unit 51 Case 52 Overhang 52a, 54 Window 53 Wheel 53a Groove 55 Protective Cover 56 Illumination 57 Line Image Sensor 58 Imaging Element 59 Block 60 Cable 65a Light Emitting Element 65b Light Receiving Element 67 Limit Switch 71, 72 Waveform Shaping Circuit 73 multiplexer 74 control circuit 75 light source driver 76 sensor driver

Claims (1)

(57) [Scope of request for utility model registration] An illumination unit configured to illuminate an original; a reading unit configured to read an image signal by reflected light from the original; a scanner unit including the reading unit and the illumination unit and capable of performing manual scanning; A document reading apparatus main body for holding the scanner unit freely, a synchronizing signal generating means provided in the scanner unit, a conveying means for conveying the document, and the scanner unit being the document reading apparatus main body Detecting means for detecting whether or not the scanner unit is attached to the document reading main body, if the detecting means detects that the scanner unit is attached to the document reading body, While the transport unit is synchronized with the transport operation of the transport unit, the detecting unit does not have the scanner unit attached to the original reading main unit. And detecting means for synchronizing the driving timing of the reading means with the manual reading scanning, and determining the moving direction of the scanner unit from the detection of the synchronization signal generating means. Document reading device.