JP3293942B2 - Document handling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to image forming apparatuses such as copiers and facsimile machines, and book manuscript handling apparatuses such as book manuscript reading apparatuses.
Related to the device .

[0002]

2. Description of the Related Art A book reading apparatus reads a book manuscript while turning the pages of the book manuscript with a page turning apparatus. As the page turning apparatus, a book manuscript placed downward and opened is moved while moving the book manuscript. Page turning by sucking and separating pages, page turning by suction moving and separating pages of a book manuscript placed upward and placed, page up and placing upward Turning a page of a completed book manuscript with a roller, an arm or the like is known.

[0003] However, the page turning apparatus has a problem that the reliability of the page turning is lacked due to the influence of the weight of the book original and the original surface is rubbed. Further, in the page turning device, since it moves in the upper space of the book document, it is difficult to avoid a large-sized device. Therefore, the present inventor has proposed a document reading apparatus having a page turning device that solves the above-described problem and that highly reliably turns a book document without increasing the size of the apparatus. Here, the book document is a document in which a plurality of pages are bound so as to be able to be spread. This document reading device scans and reads a book original while turning the pages of the book original by storing the pages of the book original in a page storage unit by a page turning device and then ejecting the pages. The reflection type photo sensor detects a page stored in the page storage unit, and based on the detection signal of the reflection type photo sensor, after a predetermined time elapses from the start of scanning of the turned page, the book original is stored in the page storage unit. It is determined whether or not the page is stored, and if the page of the original is not stored in the page storage unit, it is determined that the page turning of the original is abnormal, and after a predetermined time has elapsed from the completion of the page storage in the page storage unit, the page storage unit is turned off. It is determined whether or not the page has been ejected, and if there is no page ejection from the page storage unit, it is determined that the page ejection is abnormal.

[0004]

In the above-described document reading apparatus, the pages of the book document stored in the page storage section enter the page storage section after curling or bending.
When a page is raised from the inner surface of the page storage section, the reflection type photo sensor can reliably detect the storage and discharge of the page into the page storage section due to the variation of the reflected light depending on the leading edge position of the page. Therefore, the processing based on the detection signal of the reflection type photosensor cannot be performed accurately.

[0005] The present invention improves the above drawbacks, a page end position of the document Ki de be detected accurately and reliably, it is possible to perform processing based on the detection <br/> known signal reliably Manuscript
It is an object to provide a handling device .

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a book manuscript which is placed in a spread state.
By moving in one direction on the document surface of
Separate the manuscript pages and store the separated manuscript pages in the page storage
A page turner that turns over the book by putting it in and ejecting it
In the book manuscript handling apparatus having a cutting means,
Turning-page detecting means for detecting the end of the scanned original page;
The next page is turned based on the detection signal of the page turning means.
To calculate the end position on the start side of the page turning direction
Means .

According to a second aspect of the present invention, there is provided a display apparatus which is opened and placed.
By moving the original in one direction on the original,
Separate the top-level original page and collect the separated original page.
The document is stored and ejected to turn the pages of the book.
In a document handling apparatus having a page turning means to perform
Turning page detecting means for detecting the end of the separated original page
Based on the detection signal of the turning page detecting means,
End side end part of the page turning direction in the page turning direction
Calculation means for calculating the position .

According to a third aspect of the present invention, there is provided an image processing apparatus which is mounted with a spread.
By moving the original in one direction on the original,
Separate the top-level original page and collect the separated original page.
The document is stored and ejected to turn the pages of the book.
The page turning means to be performed and the page turning means by the page turning means.
Reading means for reading the original surface of the book original on which the
In the document handling apparatus having the
Turning page detecting means for detecting an end of the page, and the turning page
Based on the detection signal of the detecting means, the page turning means
Reading the manuscript surface of the book manuscript in which the page is turned
The start position, end position, and center binding
Calculating means for calculating at least one of them.

[0009] The invention described in claim 4 is claim 1 or 2 or
4. The book page handling device according to claim 3, wherein the turning page is detected.
The means is provided in the page storage unit .

[0010] The invention described in claim 5 is claim 1 or 2 or
5. The method according to claim 3, wherein
The calculation operation by the column is performed a plurality of times by the page turning means.
This is performed after the page turning operation .

[0011] The invention according to claim 6 is the invention according to claim 1 or 2 or
In the original manuscript handling apparatus described in 3 or 4 or 5,
Before the first page turning by the page turning means,
Edge to read the vicinity of the start edge of the turning direction of the book document
Section reading means, and read data of the end reading means.
The first page turning by the page turning means is based on
Determines the start edge position of the turning direction of the original page to be performed
It is those that.

[0012]

[0013]

[0014]

According to the first aspect of the present invention, the page turning means is provided with
Move the open original in one direction on the original surface
By separating the topmost manuscript page,
The original page is stored in the page
Turn the page of the manuscript. The turning page detecting means is separated
The end of the original page is detected, and the calculating means is turned page detecting means.
Of the next page turn based on the detection signal of
Calculate the start end position in the direction.

According to the second aspect of the present invention, the page turning means is provided .
Moves in one direction on the original surface of a book
To separate the topmost manuscript page,
The separated document page is stored in the page
Turns the pages of the book manuscript. The turning page detecting means is provided with
The end of the separated document page is detected, and the calculating means turns the page.
The page was turned based on the detection signal of the informing means
The end position of the end of the document page in the turning direction is calculated.

According to the third aspect of the present invention, a page turning means is provided .
Moves in one direction on the original surface of a book
To separate the topmost manuscript page,
The separated document page is stored in the page
Turns the pages of the book manuscript. Reading means as page turning means
Therefore, the manuscript surface of the book manuscript on which page turning has been performed is read.
The turning page detecting means detects the end of the separated original page.
Detect. The calculating means calculates the detection signal of the turning page detecting means.
Page turning is performed by the page turning means on the basis of
Starting position of the read image on the original surface of the book original
Position, end position and center binding position
Put out.

According to the invention described in claim 4, claim 1 or 2
Or the book document handling device according to item 3, wherein
The turning page detecting means provided in the
The edge of the original page is detected.

According to the invention of claim 5, claim 1 or 2
Or in the original manuscript handling apparatus according to 3 or 4, wherein
The calculation operation by the means is performed a plurality of times by the page turning means.
Is performed after the page turning operation.

According to the invention of claim 6, in claim 1 or 2,
Or in the document manuscript handling apparatus described in 3 or 4 or 5,
The unit reading means is the first page turning device by the page turning device.
Before starting, the turning end of the book document in the turning direction is
And the data read by this end reading means.
The first page turning by the page turning means is based on
The end position of the start side of the turning direction of the original page to be performed is determined.
It is.

[0020]

[0021]

[0022]

FIG. 22 shows an example of a system to which the present invention is applied. This system includes a scanner unit 50 for reading a document.
The scanner unit 500 includes a reading carriage (scanning unit) 200 that scans and scans a document while turning over the document.
The scanning unit 200 includes a CCD for reading a document image.
Image reading plate (SBC) 1 having (charge coupled device) 1
01, a VPU 102 that performs processing from analog image signal processing from the image reading plate 101 to A / D conversion,
Fluorescent lamp and its inverter power supply, heater, thermistor,
A portion 502 made of a fan, a solenoid, or the like.
The portion 502 and the VPU 102 are connected to the IPU 103 by independent flexible cables.

An IPU 103 is detachable by a connector and is a frame memory 104 for storing a read image signal.
The microcomputer in the IPU 103 applies a load such as a stepping motor for scanning the scanning unit 200 or a DC motor for driving the document table to the motor driving circuit 50.
3 and take in the signal from the sensor. The printer 501 includes a main control unit 107 that includes a main control unit that controls a mode of copying, captures and displays a key signal of an operation panel, and a sequence control unit that controls a copy timing. And the microcomputers of the operation panel 99 mutually transmit and receive commands by serial communication. The main control plate 107 controls input of sensors related to image formation of the printer 501, a motor, a solenoid, a clutch, and the like, and performs sequence control of image formation.

FIG. 1 shows a data processing block of the system. This system includes a book and sheet document reading device (hereinafter, TPS: Turn the Page Sc).
anna. ), And an electrophotographic laser printer that outputs the original read image. In this system, the image reading function and the page turning function of the book document can be configured independently of each other, but here, for convenience of explanation, both the page turning function and the image reading function are incorporated into one unit. Device.

The present system is roughly divided into an image reading section and an image data processing section of the TPS, and an image forming section including a laser printer. The image reading unit disposed at the right end of the scanning carriage of the TPS includes a reading sensor 101 including a reading plate having a CCD, and a VPU (V
An image processing unit (102) supplies a drive signal to the CCD, and performs from the correction of the analog output signal from the 101 to the conversion of the digital signal to obtain read image data of 8 bits for each dot.

The VPU 102 synchronizes the read image data of each dot of 8 bits with a clock and a gate signal in the main scanning direction and the sub-scanning direction at a speed of about 7.5 MHz and an IPU (Image Processing Uni).
t; image processing device) 103, and the IPU 103
Performs processing such as scaling of image data from the VPU 102 and high-quality processing of electrophotography. The IPU 103 performs gradation processing including gamma correction in the final processing of the image data, converts the image data into 4-bit video data suitable for writing, and stores the processed data in the frame memory 104.

That is, in this TPS, the reading speed of the original is 90 mm / sec. , Scanning speed of reading a sheet document 120 mm / sec. , Imaging speed 180mm / s
ec. Thus, since there is a difference between the reading scanning speed and the image forming speed, the A3 size 1 is used for the speed buffer.
The page frame memory 104 is used. Further, the frame memory 104 is effective for protecting the original at the time of the repeat copy, since the TPS contacts the original and scans and reads the original, and at the time of the repeat copy, the image data is repeatedly read out plural times. is there. Further, in the continuous page printing in which the TPS independently prints the left and right spread pages of the book document, the image of the left and right pages can be divided using the frame memory 104 by one scanning reading.
The PS does not require synchronous scanning with the image writing of the laser printer 501 constituting the image forming unit and re-running.

Further, the frame memory 104 stores the IP
According to the speed correspondence of U103, the frame memory 104 of each dot 4-bit configuration is arranged after the IPU 103,
By storing the write data after the image processing by the IPU 103 in the frame memory 104, the read image data of 8 bits for each dot can be stored in the frame memory 10
Halving the capacity of 4

The capacity of the frame memory 104 is 400 DP
The image data of I is 128 M bits for one page of A3 size, and is constituted by DRAM. Frame memory 1
The image data input from the IPU 103 to the image data 04 is performed in parallel for two dots of the image data, and at about 3.8 MHz.
It is performed sequentially at the speed of z. On the other hand, as for the image data from the frame memory 104, two dots of the image data are output in parallel, and the IPU 10 is output at a speed of about 7.5 MHz.
3 and sequentially output to the main control board 107 in synchronization with the gate signal in the main scanning direction and the sub-scanning direction sent from the main control plate 107.

The main control board 107 is provided with the frame memory 1
The image data output at high speed in accordance with the image forming speed of the laser printer from No. 04 is converted into serial data of about 15 MHz, and FIFO (First In First O) is used.
out) memory further speeds up in the main scanning direction, about 18 MHz
Synchronize with the z write clock. The 4-bit image data of each dot is subjected to pulse width modulation by a modulation unit to become light emission time data, which is transmitted to a laser (LD) controller by PWM.
The data is transmitted in synchronization with the write clock.
The LD controller uses the PWM data to drive the LD 10 of the electrophotographic laser printer via the LD driver.
5 is emitted to expose and scan the photosensitive member to form an image. In an electrophotographic laser printer, a photoreceptor is uniformly charged by a charger, and then an electrostatic latent image is formed by exposure scanning by an LD 105. The electrostatic latent image is developed by a developing device, and is transferred onto transfer paper by a transfer device. Transcribe.

The IPU 103 also controls the scanning of the reading carriage (scanning unit) 200 of the TPS, and drives the scanner motor 106 composed of a stepping motor for scanning the reading carriage. The scanner motor 106 drives the reading carriage at a scanning speed of 90 mm / sec. And at the time of zooming including a zoom from 71 to 141%, the scanning carriage 200 is scanned at a linear speed of 1.41 to 0.71 times that.

The scanner motor 106 returns 120 mm / sec. At the time of return to return the reading carriage 200 to the scanning start position and at the time of page turning of the original. The reading carriage 200 is scanned at a speed of. Main control board 1
Reference numeral 07 performs an image forming sequence control of the laser printer 107 by taking in input signals from sensors related to image formation via the I / O 100 and outputting output signals to a motor, a solenoid, a clutch, and the like. Also, IP
U103 is an S for transferring the read image data to another system device, for example, a printer or a workstation.
Equipped with CSI interface 98, main control board 10
Reference numeral 7 captures a signal from the operation panel 99 and outputs a signal to the operation panel 99.

Next, the image reading signal processing in the present system will be described. Reading sensor 10 having CCD
Numeral 1 is capable of reading about 5000 pixels and 400 DPI, and simultaneously reads reflected light of one line in the main scanning direction of a document and converts it into an electric signal. The electric signal from the reading sensor 101 is subjected to waveform correction such as clamping, amplification, and A / D conversion by the VPU 102, and is output to the IPU 103 as an 8-bit digital signal. The reading sensor 101 reads EVEN. ODD
And output to the VPU 102,
, A switching IC constituted by an analog switch uses an EVEN, ODD
Is combined with a serial analog signal and transferred. In this case, the image transfer speed of one pixel is about 7.5 MHz in the original reading mode. Convert. On the other hand, in the variable amplifier, in order to correct the light amount fluctuation of the fluorescent lamp, the amplification degree is adjusted to an appropriate value based on the read data of the reference white plate.

FIG. 2 shows data processing of the reading scanner in the TPS. Analog image data that is read from the reading sensor 101 and that is continuous in the main scanning direction is VP
In U102, the base level of the waveform is adjusted by the clamp, and the image data is sampled and held in synchronization with the pixel clock. Next, the VPU 102 reads the image data and varies the amplification factor of the data in accordance with the exposure light amount and the data level.
Control processing is performed, the analog image data is converted into 8-bit digital image data by the A / D converter, and read image data linear with respect to the original reflection density read by the CCD of the reading sensor 101 is obtained. Next, the VPU 102 performs logarithmic conversion on the read image data so as to efficiently handle gradation in accordance with the visibility. This logarithmic conversion is an input / output 8 bit / dot LUT
(LOOK UP TABLE).

A digital image signal for each pixel indicating the image density from the VPU 102 is input to the IPU 103 and subjected to image processing. The IPU 103 is composed of a plurality of LSIs, controls image processing of a digital image signal from the VPU 102, and controls high image quality processing. Main components will be described below. 1. Shading correction The TPS of this system uses a linear light source such as a fluorescent lamp, and the amount of light is maximized at the center of the CCD due to the light condensing of the lens, and the amount of light is reduced at the end of the CCD. Also,
CCDs vary in the sensitivity of individual elements. Therefore, the IPU 103 performs both shading corrections on the digital image signal based on the reference white board read data for each pixel.

2. In an optical system using an MTF correction lens or the like, the performance of the lens or the like affects peripheral pixel information, and the output read by the CCD is distorted. Therefore, when obtaining one piece of pixel data, the IPU 103 corrects the pixel data at the peripheral pixel level to obtain an image with high reproducibility.

3. In this system, the image reading and writing resolutions are the same 400 DPI. , The IPU 103 performs frequency conversion of the image data, and performs 50% to 200% scaling processing on the image data in the main scanning and sub-scanning directions. The IPU 103 calculates the scaling value by calculating peripheral pixel data.

4. γ Correction Density reproduction characteristics of an electrophotographic laser printer (γ characteristics of the printer) are not linear, and even if image data from a scanner is used as it is, original density cannot be faithfully reproduced. Therefore, the IPU 103 converts the image data into a write exposure light amount suitable for the print characteristics of the laser printer using the conversion table. The IPU 103 also realizes density adjustment by changing the conversion value during manual density adjustment. In addition, the IPU 103 has masking,
Image conversion such as trimming, mirroring, black and white reversal, document size, position and density detection, and marker detection are also performed.

The image data sent from the IPU 103 is converted into light energy by the LD 105. The laser printer of the optical writing system in this system is L
A method is used in which a laser beam from D105 is deflected and scanned by a polygon mirror and is exposed on a photoconductor to form an electrostatic latent image. The modulation method of the LD 105 is mainly 1
There are a pulse modulation method that modulates the exposure time in a dot and a power modulation method that modulates the exposure intensity, and the system employs the former method. Thereby, high image quality with resolution and gradation can be obtained.

Next, the book original exposure method of the TPS will be described. 3 and 4 show a fluorescent light dimming circuit of the present system. The present system includes two fluorescent lamps 201 and 202 as light sources for exposing a book document and two fluorescent lamps 203 and 204 as light sources for exposing a sheet document. Dimming circuit. That is, the present system includes a total of four fluorescent lamps 201 to 204,
It has four fluorescent lamp dimming circuits that can be controlled independently.
Here, two fluorescent lamps 20 as light sources for exposing the original are used.
As shown in FIG. 34, reference numerals 1 and 202 denote platen glass 205 disposed at a book reading slit position in a direction orthogonal to the scanning direction of the scanning unit (carriage) 200.
Are arranged at the upper ends of both ends.

The fluorescent lamps 201 and 202 expose the book BO from both the left and right sides through the platen glass 205 to eliminate unevenness in density due to left and right pages when reading the book BO and the shadow of the book binding portion BOa. I have. On the other hand, two fluorescent lamps 20 as light sources for exposing a sheet original are used.
Reference numeral 3,204 denotes the scanning unit 20 as shown in FIG.
The fluorescent lamps 203 and 204 are arranged at the sheet document reading slit position in the direction orthogonal to the scanning direction at the upper part of the system 0 through the contact glass 206 on the upper surface of the present system. Document S set according to
O is exposed from both the left and right sides to eliminate density unevenness and shading when reading the sheet document SO as in the case of the book document BO.

The fluorescent lamp dimming circuit of the original BO shown in FIGS.
1b and 202b. Light intensity sensor 20
Reference numerals 1a and 202a each include a photodiode, and are disposed at a substantially central portion in the scanning direction on the back side of the fluorescent lamps 201 and 202 in the document exposure direction.
The dimming circuits 201b and 202b monitor the light amounts of the respective fluorescent lamps, which change with temperature, by light amount sensors 201a and 202a, respectively, so that the light amounts of the respective fluorescent lamps 201 and 202 become constant exposure proper values. Feedback control.

Each of the dimming circuits 201b and 202b includes a fluorescent lamp 201,
The light amount signals for the light emitting devices 02 are respectively integrated into integration circuits 201c and 202.
The light is averaged by c and amplified by the amplifier circuits 201d and 202d, and the lighting circuits 201e and 202e drive the fluorescent lamps 201 and 202, respectively, so that the difference from the target exposure light amount of the fluorescent lamps 201 and 202 is eliminated. I do. The driving method of the fluorescent lamps 201 and 202 is a CCD.
The fluorescent lamps 201 and 201 are used so that the reading density unevenness does not occur in synchronization with the image reading sampling of the image 101.
A rippleless dimming method for adjusting the light amount by changing the amplitude of the driving current 202 is used. Here, the fluorescent lamp 10
The driving frequency of the fluorescent lamps 101 and 102 is 40 kHz.
The dimming frequency of 102 is about 1 kHz.

The light control circuits 201b and 202b are connected to the fluorescent lamp 20.
IPU as target exposure light amount of 1,202 according to the mode
A setting signal of 0 to 255 is supplied from a microcomputer in the remote controller 103 to remote voltages V1 and V2 via a D / A converter.
Is input to the remote voltage terminal at an analog level. The dimming circuits 201b and 202b also start lighting the fluorescent lamps 201 and 202 at the exposure scanning start timing by the lighting signals S1 and S2 from the microcomputer in the IPU 103 which similarly performs sequence control of the scanner unit, and start the fluorescent lamp 201 at the end of scanning. , 202 are turned off.

The scanning speed of the scanning unit 200 when reading a sheet document and the scanning speed of the scanning unit 200 when reading a book document are both 90 mm / sec. The charge stored in the CCD 101 is determined by the product of the light receiving power and the storage time. In view of the variation in the amount of fluorescent light when reading a document, the VPU 102 shown in FIG.
The above-described AGC process is performed by using a read image data amplifier circuit as shown in FIG. 3 to detect a reflection signal of an independent reference plate before the start of reading scan and adjust the amplification gain of the read image data. At the same time, the VPU 102 independently performs shading correction of image data on variations in the amounts of light of the original original exposure fluorescent lamps 201 and 202 and the sheet original exposure fluorescent lamps 203 and 204.

FIGS. 5 to 9 show examples of the set exposure light amount of the fluorescent lamp. FIG. 5 shows an example in which both the fluorescent lamps 201 and 202 are exposed while the set values are kept constant from the start of the scanning for reading the original BO. FIG. 6 shows an example in which the microcomputer in the IPU 103 operates the remote voltage signal to increase the amount of fluorescent light exposure at the binding portion BOa of the book BO. This increase in the amount of fluorescent light exposure is caused by the IPU 103
Is performed by changing the remote voltage signal according to the scanning control position from the scanning start position of the scanning unit 200.

Specifically, in the example shown in FIG.
The microcomputer in 03 gradually increases the remote voltage signal from the scanning address 210 mm point to 230 mm point of the scanning unit 200 to gradually increase the fluorescent lamp exposure light amount, and the scanning address 25 of the scanning unit 200.
The remote voltage signal is gradually reduced from the 0 mm point to the 270 mm point, and the fluorescent lamp exposure light amount is gradually reduced and restored. Alternatively, the microcomputer in the IPU 103 calculates the binding portion BOa of the book BO that is displaced to the left and right due to the page turning based on the result of detection of the book document edge described later, and similarly controls the light amount. As a result, an increase in density (insufficient light amount) due to a shadow generated at a binding portion of the book document is improved.

Further, by increasing the amount of exposure light during scanning, as indicated by the broken line in FIG. 6, according to the thickness of the placed original document, insufficient exposure caused by the curvature of the binding portion BOa and reading can be prevented. Density unevenness due to the focus lens can be corrected. This correction is performed by detecting the opening / closing amount of a pair of slide plates (that is, the thickness of the bookbinding portion) of a pair of slide plates for mounting the bookbinding portion of the bookboard described later with a sensor (not shown), as shown in FIG. The microcomputer in the IPU 103 increases the light intensity of each fluorescent lamp in the bookbinding section according to the thickness of the book.

FIG. 8 shows an example in which the microcomputer in the IPU 103 increases the exposure light amount of the two fluorescent lamps 201 and 202 asymmetrically to correct an increase in the density of the binding portion BOa of the book BO. In FIG. 8, the solid line is the light amount setting value of the right fluorescent lamp, and the broken line is the light amount setting value of the left fluorescent lamp. In this example, the reading unit of the scanning unit 200 of the microcomputer in the IPU 103
From the position where the reading original surface is inclined rightward, the light amount setting value of the right fluorescent lamp is increased as shown by a solid line, and the exposure is performed from the right side perpendicular to the original surface so that the fluorescent lamp is easily exposed. The amount of light is increased 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 image reading section reaches the center of the book binding section, the microcomputer in the IPU 103 returns the light amount setting value of the right fluorescent lamp to the original value, and this time in the reverse of the above. From the position where the reading original surface is inclined to the left, the light amount setting value of the left fluorescent lamp is increased as shown by the broken line, and the exposure light amount from the left perpendicular to the original surface is increased so that the fluorescent lamp is easily exposed, The background density of the binding portion is adjusted so as to be the same as the background density of the document page portion. When the image reading unit reaches the end of the right-hand curved portion of the bookbinding unit, the microcomputer in the IPU 103 returns the light amount setting value of the left fluorescent lamp to the original value. Is maintained at a constant light amount.

FIG. 9 shows the transition of the light amount setting value of each fluorescent lamp when the microcomputer in the IPU 103 gradually changes the exposure light amount of each fluorescent lamp in the scanning direction. 8 is an enlarged view of the exposure light amount when the exposure light amounts of the left and right fluorescent lamps in FIG. 8 are independently increased. In this way, by gradually changing the exposure light amount of each fluorescent lamp, it is possible to perform density correction in accordance with the inclination of the curvature of the bookbinding portion, and the secondary light due to the change in the exposure light amount at the binding portion. Occurrence of band-like unevenness due to density jump in the scanning direction is prevented. Also, as shown in FIG. 6, the step of changing the amount of exposure light of each fluorescent lamp is sufficiently set to 256 steps to gradually change the amount of light of each fluorescent lamp. The same effect can be obtained even when the right and left sides are similarly increased at the book original binding portion.

Next, a method of correcting density unevenness using a TPS read image data amplifier circuit will be described.
FIG. 10 shows the read image data amplifier circuit. This read image data amplifier circuit includes an operational amplifier 301,
Capacitor C1, resistors R1 to R9 and transistor Q1
To Q5, a VPU
Reference numeral 102 denotes an analog image signal from the CCD 101, which is subjected to waveform correction such as clamp, sample hold, and even / odd pixel synthesis, and then amplified by a read image data amplifier circuit, A / D converted, and converted into IP as digital data.
Transfer to U103.

The read image data amplifying circuit amplifies the input analog image signal VIN by the operational amplifier 301 and outputs it as an output signal VOUT. The 5-bit input signals G1 to G5 for setting the data amplification value are connected to the transistor Q1.
When the transistors Q1 to Q5 are turned on / off in addition to the bases of the transistors Q1 to Q5, the resistors R3 to R7 are selectively connected to each other. Is set to

The amplification factor of this read image data amplifier circuit is determined by the resistance value R composed of the resistor R1 and the parallel resistance of the resistors R2 to R7, and is represented by VOUT = VIN (1 + R / R1). Therefore, in this read image data amplifier circuit, it is possible to select a magnification of 32 steps from about 6 to 450 times by setting values of the input signals G1 to G5.
In this example, the analog image data is corrected by adjusting the amplification factor of the read image data amplifier circuit. However, similar correction is performed by shifting or multiplying the digital image data after the A / D conversion. You may.

In the image data correction of the present system, the read image data is increased at the binding portion of the book original by operating the amplification factor set value of the read image data amplifier circuit, similarly to the variable exposure light amount example shown in FIG. To reduce the image density. This correction is changed according to the scanning position from the scanning start position of the scanning unit 200, and specifically, 230 m from the scanning address 210 mm point of the scanning unit 200.
The data amplification value of the read image data is gradually increased up to the point m, and the scanning address 250 of the scanning unit 200 is increased.
From the mm point to the 270 mm point, the data amplification value of the read image data is gradually reduced and restored.

As a result, the density increase due to the shadow generated at the binding portion of the book document is improved. In addition, by increasing the amplification factor of the read image data amplifier circuit according to the thickness of the placed original document, it is possible to correct insufficient exposure caused by the curvature of the binding portion BOa and density unevenness due to the reading focus lens. This correction is performed by detecting the opening / closing amount of the pair of slide plates (that is, the thickness of the bookbinding portion) by a sensor (not shown), and similarly to the case shown in FIG. This is performed by increasing the amplification factor of the read image data amplification circuit in the bookbinding section in accordance with the thickness of the original document. Furthermore, by gradually changing the amplification factor of the read image data amplifier circuit in the scanning direction of the scanning unit 200, it is possible to perform density correction in accordance with the inclination of the curvature of the bookbinding portion. The occurrence of band-like unevenness due to a density jump in the sub-scanning direction due to a change in the amount of exposure light at the binding portion is prevented.

By the way, the curvature and shadow of the book original binding portion are
Generally, it has a characteristic that occurs at the same position in the main scanning direction. Therefore, in order to improve the density unevenness due to the bookbinding portion, the image data in the main scanning direction is sampled,
The image data of the line in the main scanning direction may be corrected in real time based on the lowest density value that is the background portion of the original document. In this correction, the amplification factor of the read image data amplifier circuit shown in FIG. 10 is determined based on the peak value of the image data of the previous line in the main scanning direction. Alternatively, FI
One line of image data is delayed and sampled by the FO memory, the peak of the lowest density value of the image data in the main scanning direction, which is the background portion of the book, is calculated, and the digital image data is shifted based on the value. Alternatively, an operation is performed so that the background density near the binding portion becomes equal to the background density of the page portion by performing multiplication. Here, since the background density in the pages of the book is generally constant, the amount of image density correction in the page is small, and the side effect caused by using the minimum density value, which is the background of the book, as the reference value is extremely small. .

Generally, the left page portion of a two-page spread original such as a gazette increases due to the page turning operation, and the left end of the original moves upward and rightward with reference to the book cover position. On the other hand, the right page portion of the book original is reduced by the page turning operation, and the right end of the book original moves downward and to the right. FIGS. 11 to 13 show transition examples of the left end portion of the book original with respect to the number of repeated page turning. FIG.
In FIGS. 1 to 13, the position of the left end of the original spread original of the placed original is set to “0”, and the amount of movement of the left end of the original, which is increased by the page turning operation, to the right is represented by the displacement. It represents. In addition, the amount of displacement of the left end of the book original in the right direction is indicated as a plus and displayed in millimeters.

FIG. 11 shows a book original having a thickness of 20 mm and a total number of pages of 7
In the case of 50 pages, FIG. 12 shows a case where the thickness of the book is 12 mm and the total number of pages is 300 pages, and FIG. 13 shows a case where the thickness of the book is 9 mm and the number of pages is 180 pages. B4 size. As is clear from FIGS. 11 to 13, the left end of the book original is displaced rightward by turning the pages, but the displacement changes the shape of the center binding portion, and the displacement of the left end of the book original is not necessarily monotonic. It does not increase. In addition, since the center binding portion of the book document slides in the left and right direction due to page turning, FIGS.
As shown in FIG. 3, there is also a point where the displacement amount decreases in the page turning process, and the thin original shown in FIG. 13 is also displaced to the left (minus direction). Further, these displacement amounts are also affected by the size and thickness of the book original, the paper quality, and the like. When the front cover of a book is fixed on a press platen as in this system, sudden displacement due to flapping of the spine of the book is suppressed, but the topmost page position of the spread book changes due to page turning. I do. This results in a deviation between the reading position and the page turning position.

Therefore, in the present system, regardless of such displacement of the end of the book original, an image effective range (page of a book that has been opened) suitable for image capture and printing is obtained. Then, based on the image reading information of the reading sensor 101, the position of the end of the opened page of the book document is detected, and the image effective range of the book document is obtained based on the end position of the book document. When the spread size is A3, the edge portion (cover edge) of the book document detected by the present system is located at a position approximately 210 mm from the center set position and approximately 30 mm from the home position of the scanning unit 200 at the reading position.

The detection of the end of the book original in the present system is performed by changing the read information by the specific pixel of the reading sensor in the sub-scanning direction. The read data of the read sensor is as shown in FIG. Here, at the left end of the book document, since the read document surface is located below the image forming point of the reading sensor, the focus is deviated and the image is slightly blurred. When the reading position has not reached the original, the original platen or book back cover is read, and the level is the same as that of the black image.

When the reading position of the reading sensor reaches the end of the book document, a striped portion due to the edge group of each page of the book document is detected. In general, most book originals have a white background on the page, and there are no characters or images in a portion tens of millimeters from the end of the book original. Therefore, when the uniform color (white) continues, it is determined that the document is at the end. The end of the book document is detected at the end of the page turning scan in a direction opposite to the image reading direction.

As described above, by detecting the document surface based on the output information of the reading sensor, an image effective range suitable for image capture and printing can be obtained regardless of the displacement of the end of the book document. In general, the edge of the original of the two-page spread original BO is formed by stacking the edges of the original pages in an inclined manner as shown in FIG. The document is read with emphasis on the stripes formed by the edge groups on each page of the book document.

In this system, a pair of fluorescent lamps 20 are read from the left and right sides of the document surface in order to read the left and right pages uniformly when reading the book document and to read the curved portion of the binding portion of the book document.
Exposure illumination is performed in step 202. Then, at the time of detecting the end of the original, one of the fluorescent lamps is turned off or dimmed to emphasize the stripe pattern due to the edge group of the original pages at the end of the original, thereby improving the accuracy of detecting the position of the end of the original. That is, IPU1
In the second half of the page turning scan of the scanning unit 200 from right to left, the microcomputer in the operating unit 03 operates the lighting signal S2 of the fluorescent lamp dimming circuit of FIG. 3 and the remote voltage V2 to turn on only the fluorescent lamp 202 on the right side. Let it. Also, IPU103
The microcomputer inside detects the right-page edge of a double-page spread original for page-sucking for turning a page. When the scanning of the original surface is completed, the lighting signal S2 of the fluorescent light dimming circuit shown in FIG. By operating the voltage V2, the fluorescent lamp 20 on the right
Turn off only 2 and read.

By the way, in the method of detecting the edge of the book by the edge group of the book as described above, if there is an image similar to the striped pattern by the edge group of the page in the read page of the book, There is a possibility that the detection of the end of the document is erroneous.
Therefore, when the end of the original is detected, the image of the pair of fluorescent lamps 201 and 202 is exposed and illuminated from both sides and the image of only one fluorescent lamp is exposed and illuminated from one side. It is possible to enhance the detection accuracy of the end portion.

In this method, the microcomputer in the IPU 103 turns off or dims one of the fluorescent lamps at the time of detecting the end of the book, and emphasizes and reads the stripes formed by the edge groups of the pages at the end of the book. A first mode is switched between a first mode and a second mode for exposing and illuminating with both fluorescent lamps 201 and 202 to read a stripe pattern formed by a group of edges of a page at the end of a book original. The image reading data in the mode is compared with the image reading data, and the reading data in the case where there is a difference between the two image reading data is set as the detection data of the end of the book original.

The microcomputer in the IPU 103 compares the image read data in the first mode and the image read data in the second mode, and if the difference between the two is small, the read data is formed on a plane. It is determined that the data is read data of the current document, and is recognized as read data of the image printed in the book page.
More specifically, the microcomputer in the IPU 103 operates the lighting signals S1 and S2 and the remote voltages V1 and V2 of the fluorescent lamp dimming circuit shown in FIG. Then, the lighting of the fluorescent lamp is switched. The timing of switching the lighting of the fluorescent lamp may be performed for each line of the main scanning, or may be scanned twice and stored in a memory for comparison. Also, this method may be carried out only when the detection result of the end of the book document is doubtful to confirm it. As described above, according to this method, it is possible to further improve the accuracy of detecting the position of the end of the book document.

FIGS. 16 to 21 show the copy operation timing of the present system in the book original mode. FIG. 16 shows a case where the end of the book original is detected by an image in the initial mode after the print key of the operation panel 99 is pressed.
21 to 21 show the case where the end of the book original is detected by the page storage position in the middle of the continuous copying mode. 17 to 21, the first original reading operation and the edge detection operation based on the image are the same as those in FIG.

In FIGS. 16 to 21, the numerals indicate the read page numbers of the original, and pages 2, 3, 4, and 5 constitute the spread pages of the original. The symbols RP and LP of the read signal memory R of the frame memory 104 represent the right page (RP) and the left page (LP) of the read image data, respectively. Further, the page size of the book in each mode is A4 size, and two facing pages of the book are read continuously by one scan of the scanning unit 200, and the read image data is stored in the frame memory 104 in the frame memory 104. The image data is stored as read data, image data is read from the frame memory 104 in accordance with each output mode, an image is formed by a laser printer, and the image is recorded on transfer paper.

FIGS. 16 and 17 show an image of a book original in a double-page spread state on A3 size transfer paper.
FIG. 1 shows a case of a 1-to-1 copy mode for copying a set,
Reference numeral 8 denotes a 1 to 1 copy mode in which each image of the left and right pages of the original is read separately on an A4 size transfer sheet for each independent page, and one copy of the original is copied. FIG. 19 shows a two-sheet copy mode in which an image of an independent page is output in the same manner as in FIG. 18, the number of set copies is two, and two copies are made for a book document.

When the print key for instructing the start of copying on the operation panel 99 is turned on at the book original mode operation timing shown in FIG. The scanning unit 200 located at the center is moved in the reading start direction. When the scanning unit 200 moves to the reading start position at the left home position, the microcomputer in the IPU 103 drives the scanner motor 106 in the normal rotation direction, turns on both the fluorescent lamps 201 and 202, and performs the reading operation of the original. Let it start.

The microcomputer in the IPU 103 reads an original image from the end of the left page of the two-page spread original as an original image and generates an effective image area signal SFGATE in the sub-scanning direction. The microcomputer in the IPU 103 operates the data write signal memory W of the frame memory 104 according to the effective image area signal SFGATE,
Control the data writing range.

The microcomputer in the IPU 103 starts detecting the right page end of the book original when the cache 200 reaches the right page end of the two-page spread original, and calculates the page suction position at the time of page turning. When the reading scan of the cache 200 is completed, the page turning scan of the backward movement is started, and the laser printer starts image formation for the first time after the image effective range is determined based on the page storage position. After the second scanning, the laser printer starts image formation immediately after the end of the reading scan in the image effective range calculated based on the previously detected page storage position. Effective image area signal PFGAT in the sub-scanning direction on the laser printer side
E operates the data read signal memory R of the frame memory 104 to output image data in synchronization with the laser printer. Further, at the time of page turning, the page end of the two-page spread original is repeatedly detected by the page storage sensor. By repeating the above steps, the double-page copy of the original is performed while automatically turning the pages of the original.

FIG. 18 shows a 1TO1 copy mode in which an image is output for each independent page of a book. In this case, in the reading mode, the operation is performed at the same timing as in the case of FIG. 17, and the image output at the time of turning the page is performed by two PFGATEs according to the transfer paper that is continuously conveyed. Is operated to output image data for each page of the book document. When the address counter of the frame memory 104 is stopped by being masked by PFGATE, the image data of the right page linked to the first image of the left page of the book original has the transfer paper interval in the laser printer by the second PFGATE signal. Read out.

FIG. 19 shows a mode in which two copies of an independent page of a book document are made in the same manner as in FIG. In this case, in the reading mode, the operation is performed at the same timing as in the case of FIG.
The data read signal memory R of the frame memory 104 is operated by the TE, and a plurality of image data for each page of the book are output. In this example, first, two images of the read left page are output, and then two images of the read right page are output continuously. While the laser printer is outputting a plurality of images, the TPS ends the page turning scan, and the carriage 200 stops at the reading scan start position and stands by for the next reading scan.

FIGS. 20 and 21 show the operation timing of the book original duplex mode. In the book original duplex mode, both sides of the transfer paper are copied in the same configuration as the front and back of the pages of the book original. FIG. 20 shows a case where copying is performed in the read page order. In this method, image data of the right page of a two-page spread original is read from the frame memory 104 and formed on the surface of a transfer sheet by a laser printer, and the transfer sheet is inverted and transported to a double-sided stack position via a double-sided transport path. Is done. Meanwhile, TPS
Performs one page turn by scanning in the left direction, reads the next double-page spread of the book document, and stores the image data in the frame memory 104. The transfer paper that has been conveyed by the two-sided conveyance path is re-fed by the laser printer, the image data of the left page of the two-page spread original is read from the frame memory 104, formed on the back side of the transfer paper, and the transfer paper is discharged. Is done. In the case of FIG. 20, there is a time required for reversing the transfer paper for forming both sides and re-feeding the paper by the transport path, and the time is 1 TO1.
Low productivity for duplex copying.

FIG. 21 shows a case of the 1TO1 high-speed double-sided copy mode in which the original document is copied by using the frame memory 104 while changing the reading page order. In this case, first,
An image of one page on the right side of the two-page spread of the book is formed on the surface of the first transfer sheet, and the first transfer sheet is conveyed by the double-sided conveyance path. Second, the next two-page spread and three pages of the book document are read, and the image data is stored in the frame memory 104. Third, the image data of three pages is stored in the frame memory 1.
04 and is formed on the surface of the second transfer paper,
The second transfer paper is transported by the double-sided transport path.

Fourth, the first transfer sheet at the double-sided stack position is fed again, and the image data of two pages is stored in the frame memory 10.
4 and is formed on the back surface of the first transfer sheet, and the first transfer sheet is discharged. Hereinafter, the image of the book document is read and output in the reverse order of the facing pages, so that double-sided copying of the book document is performed at high speed. That is, in the case of FIG. 20, two-sided conveyance path conveying time of the transfer sheet is inverted for two-sided image formation of the transfer sheet is the same in time to re-feeding by the transport path, the high-speed double-sided copy mode in the duplex transport The next transfer paper image formation is performed during the road transport period, and a copy productivity 1.5 to 2 times that of the related art can be obtained.

In the present system, in the double-sided copy mode, when copying a large number of copies of two or more, an image is formed in the page order of the book original as shown in FIG.
An image is formed on the front side of the transfer sheet of the designated number of copies, and the transfer sheet is temporarily stored in the double-sided stacking position and then re-fed to form the backside image of the designated number of copies and discharged. This system performs a stable page turning operation with respect to suction and separation of book pages due to displacement of a suction roller. This is because the suction position is important because only the leading end of the page is sucked and displaced upward and guided to the page storage unit.

As described above, the page end sensor detects the end of the page of the book at the time of scanning the page turning of the book, and determines the operation position of suction and separation with respect to the page end of the book which is changed by repeating the page turning. Is done. That is, the end of the page on the scanning end side is detected from the page storage position data, the ascent position of the suction roller at the time of page turning scanning is determined, and control is performed so that the same amount of pages is always sucked and separated. As described above, since the image area and the end of the book original are detected and operated by the page storage sensor, the image reading position (registration) and the stable page turning operation can be performed from the beginning to the end of the book original without using independent detecting means. Is realized continuously.

In this system, as shown in FIG. 34, inside the scanning unit 200, there is a turning belt 208 for turning the pages of the book BO by electrostatic attraction. By forming a charge pattern thereon by a high voltage power supply, the turning belt 208 is formed.
It is electrostatically attracted on top.

The turning of the original page electrostatically attracted onto the turning belt 208 is performed by swinging the turning belt 208 upward by the turning belt vertical solenoid to lift the end of the attracted page to the scanning unit 200 side. This is done by: At this time, the page storage sensor detects whether the original page has been turned. If the page detection by the page storage sensor is not performed at a predetermined timing during the page turning, the page turning scan is executed again.

The mirror switching solenoid is a solenoid for switching between a lower reading optical path dedicated to a book original and a general upper reading optical path for a sheet original or the like. A keep solenoid is used. You. An original image passes through a mirror and a lens under illumination of each fluorescent lamp, and is connected to a CCD 101 connected to a VPU 102.
Is imaged. The VPU 102 generates a clock for driving the CCD 101, converts an analog image signal output from the CCD 101 into a digital value by an A / D converter, and outputs the digital value to the printer unit 501 including the laser printer through the frame memory 104 and the IPU 103. . Here, the frame memory 104 is used as a buffer for the TPS reading linear speed and the process linear speed of the printer unit 501 . In the IPU 103, processing of image data is performed.

Hereinafter, the configuration of the document table unit in the TPS will be described.

As shown in FIG. 23 to FIG.
Is formed of a resin plate having a thickness of 2 mm, and a material having a high coefficient of friction such as extremely thin rubber is adhered to an upper surface thereof. This 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 example has a document placement surface (upper surface) of A4 size, and is disposed one each on the left and right of the center 2 of the apparatus main body. A slide plate 3 is fixed below each platen 1. Each of the slide plates 3 is formed of a sheet metal whose front, rear, and outside surfaces are bent downward, and adjustment studs 4 are fixed to the front and rear side surfaces of the slide plate 3 near the center 2 of the apparatus body. . The end of each adjustment stud 4 has a hole for fitting a pin of a slider 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 coefficient of friction. Here, the upper surface of the upper and lower bases 5 is formed with a resin rib such as Teflon,
It can move to the left and right smoothly relative to the slide plate 3.
Further, the slide plate 3 and the upper and lower bases 5 are relatively fixed by a size stopper 27 described later. Angles 7a and 7b with long holes in the left-right direction are provided at four positions in the front-rear and left-right directions below the upper and lower bases 5. Another angle 8 having a fixed rotation axis and another angle 9 having a long hole in the left-right direction are fixed to the base 6 of the document table unit.

The link plate 1 is provided at the angles 8 and 7b.
0 is rotatably supported, and a link arm 11 is rotatably supported at the angles 9 and 7a. With respect to the angles 7a, 7a, and 9, the link plate 10 and the link arm 11 can smoothly slide in the left-right direction, respectively. Further, as viewed from the entire surface of the platen unit, two arm plates 10 and link arms 1 are provided at each of the front and rear sides.
Reference numeral 1 denotes an X-shaped crossing portion, which is rotatably supported by studs 12 so as to be mutually rotatable.

The torsion spring 13 is connected to the link plate 10 and the link arm 11 with the stud 12 as a torsion center.
And the torsion spring 13
In FIG. 23, a force for constantly pushing the upper and lower bases 5 upward works. The lifting of the upper and lower tables 5 due to the lifting force is performed by the scanning unit 200 whose vertical movement is restricted as described later.
Then, the original document set on the original platen unit is regulated by contact with the original surface. 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 original.

The ends of the two upper and lower bases 5 on the center 2 side of the apparatus main body 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 spine of the book BO is set on the back support plate 14. The back support plate 14 is constantly tensioned in the left-right direction by the action of a tension spring 17 described later. That is, a hook 15 is provided on the upper and lower base 5, and the hook 15 and the angle 16 of the link plate 10 are connected by a tension spring 17, whereby the pair of left and right upper and lower bases 5 is pulled in a direction away from each other. ing. As a result, tension is constantly applied to the spine support plate 14, and the spine of the book document is supported without slack.

On both sides of the base 6, side plates 1 made of sheet metal are provided.
8 is fixed, and a fixing pin 19 on which an open / close lock claw 32 of a scanner unit 30 described later
With. 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. I have.

The size stopper 27 adjusts the distance between the left and right document tables 1 according to the thickness of the book document to be placed, and relatively fixes the slide plate 3 (document table 1) and the upper and lower tables 5. The document table 1 and the upper and lower tables 5 are to be moved integrally with each other. FIG. 25 and FIG. 26 show schematic configuration diagrams. As shown in FIG. 24, a pair of angles 22 are attached to the lower side of the upper and lower bases 5 at predetermined intervals.
As shown in FIG. 25, a rod 23 is fixed to these angles 22 so as to be laterally suspended. The 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 own through hole. A short axis 26 is implanted in the sliding body 24 so as to be orthogonal to the rod 23, and a stopper 25 is rotatably supported on the short axis 26. Here, stopper 2
Reference numeral 5 extends so that a locking hole 25a formed in one end thereof is loosely fitted to the rod 23 and the other end can be grasped by a finger.

The sliding body 24 is fixed at an arbitrary position of the rod 23 by the inclination of the stopper 25 with respect to the rod 23 and the engagement of the rod 23 with the locking hole 25a of the stopper 25. That is, the sliding body 24 is usually tilted by the stopper 25 by the locking spring 28,
The rod 23 and the stopper 25 are integrated to be fixed to the rod 23. In FIG. 26, the operator rotates the extended end of the stopper 25 with a finger in a direction against the elasticity of the locking spring 28. By doing so, the engagement between the rod 23 and the locking hole 25 a of the stopper 25 is released, 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, by fixing the slide 24 at a predetermined position of the rod 23 as described above, the slide plate 3 (the document table 1) and the upper and lower tables 5 are relatively moved via the slide 24 and the rod 23. It can be fixed at any desired position.

FIGS. 27 and 28 show a schematic configuration of the opening / closing lock mechanism of the document table unit. The TPS has a configuration in which the scanner unit 30 is mounted on the document table unit 35 as shown in FIGS. These two units 30 and 35 are connected to each other by a hinge 36 provided 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. The opening / closing lock mechanism of the document table unit in the TPS is disposed at a front part of both units 30 and 35. As described above, the side plate 18 is provided with the fixing pin 19.

As shown in FIG. 27, a shaft 31 is rotatably supported on the right and left side plates on the scanner unit 30 side. It rotates in accordance with the rotation of 31. An opening / closing lever 33 is fixed in the vicinity of the center of the shaft 31. The lock claw 32 is disengaged.

A spring 34 is hung on the opening / closing lever 33, and the spring 34 urges the opening / closing lever 33 in a direction in which the open / close lock claw 32 engages (locks) with the fixing pin 19. As a result, in a state where the scanner unit 30 is closed as shown in FIG. 27, the opening / closing lock claw 32 engages with the fixing pin 19 and is locked to the document table unit 35. 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 opening / closing lock claws 32
Is removed, and as shown in FIG.
0 is opened upward with the hinge 36 as the center of rotation, and the upper part of the document table unit 35 (document table 1) is opened.

Next, the platen pressure fixing switching device and the platen retracting device of the present system will be described. The document platen 1, which is configured to be movable in the vertical direction by the link plate 10 and the link arm 11, is constantly biased by a torsion spring 13. As a result, the scanner unit 30 is
In the closed state, the document table 1 is always pressed upward by the upward behavior of the document table 1 so as to press the document surface of the book document BO that is opened and placed on the document table 1 against the lower portion of the scanner unit 30. I have.

The pressing force on the original surface of the book BO is normally received by the scanning unit 200 in the scanner unit 30, but the scanning unit 200 has moved to a position on the platen 1 that has deviated from the book original. In this state, the document table 1 and the book document BO dig into the scanner unit 30 due to the ascending behavior of the document table 1, and the smooth movement of the scanning unit 200 is hindered. Therefore, with the platen 1 raised to an appropriate position, the platen 1 is fixed and
It is necessary to prevent the document table 1 and the book document BO from getting into the scanner unit 30 excessively due to the rising behavior of the document table 1.

Also, as described later, the scanning unit 200
When the original on the contact glass 206 arranged above the scanner unit 30 is read by switching the scanning optical path inside the original unit 1, the lower part of the scanning unit 200 and the upper surface of the original table 1 do not come into contact with each other. It is necessary to retract the document table 1 below. The platen pressing / fixing switching device and the platen retracting device are devices for solving these problems, and FIGS. 29 to 34 show configuration examples of a mechanism in which both devices are shared by one mechanism.

As shown in FIG. 29, a control wire 40, one of the components of this mechanism, has a hook 4 at one end thereof.
1 is fixed, the other hook 42 is fixed to the other end, and a spherical stop ball 45 is fixed substantially near the center thereof. The hook 41 is fixed to an outer end portion of the link plate 10 (a side that moves up and down by raising and lowering the document table 1).
The control wire 40 extending from the hook 41 is connected to the pulley 4
6, the direction is changed via the pulley 47, and the control pulley 48 is changed.
Is wrapped around.

As shown in FIGS. 30 and 31, the control wire 40 is guided into the groove 50 of the control pulley 48, and the stop ball 45 fixed near the center thereof is fitted into the stop hole 49 of the control pulley 48. ing. This ensures that the movement of the control wire 40 is converted to the rotational movement of the control pulley 48. The control wire 40 wound around and extended from the control pulley 48 is constantly pulled by one end of a tension spring 43 hooked on a hook 42 at one end thereof. 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 is, as shown in FIG.
It is supported by a shaft 54 via a one-way clutch 51. The shaft 54 is secured to the slide bearing 52 supported by the pair of side plates 55 at both ends thereof by an E-ring 53.
5 is rotatably supported. As a result, the control pulley 48 moves the shaft 54 toward the arrow a in FIG.
However, in the direction opposite to the arrow a, the one-way clutch 51 cannot rotate relative to the shaft 54.
And rotate together. Therefore, when the shaft 54 is fixed by a mechanism described later, the control pulley 48 can be rotated only in the direction of arrow a in FIG.

Next, the lowering / fixing operation of the document table 1 by the document table pressure fixing switching device will be described. FIG.
9 to 31, in a state where the shaft 54 is fixed, when the document table 1 is pushed down by some external force, for example, the weight of the book document BO or pressurization by a turned page, the document table 1 The end on the hook 41 side of the control wire 40 fixed to the side is loosened. At the same time, the control pulley 48 is pulled by the tension spring 43 and rotates in the direction of arrow a while absorbing the slack of the control wire 40 on the hook 41 side, so that the control wire 40 maintains the initial tension and moves toward the hook 44 side. Moving.

At this time, since the control pulley 48 cannot rotate in the direction opposite to the arrow a due to the action of the one-way clutch 51, even if the lifting 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 upward force of the document table 1, and the control pulley 48 is stopped while maintaining the position rotated in the direction of the arrow a. 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 stopped.

Here, the shaft 54 is fixed by a platen elevating mechanism described below. That is, the gear 56 is fixed to the shaft 54 so as to rotate integrally with the shaft 54 as shown in FIG.
As shown in FIG. 33, the gear 56
Is engaged with another gear 57 rotatably supported by a stud 59 fixed to the gear 57, and the rotation is transmitted to the gear 57.

Further, the gear 57 is formed integrally with the worm wheel 58, and the worm wheel 58 is configured to mesh with a worm gear 60 fixed to an output shaft of a document table elevating motor 61. With this configuration, when the platen elevating motor 61 is stopped, the worm wheel 60 cannot rotate due to the engagement between the worm gear 60 and the worm wheel 58, and the gear 56 engaged with the gear 57 integrated with the worm wheel 58. The shaft 54 connected via the shaft is fixed.

Next, the retracting operation of the original table 1 below the original table unit 35 will be described. 32 to 34, when the platen elevating motor 61 is driven so that the gear 56 rotates in the direction of arrow b, the one-way clutch 51 rotates the control pulley 48 and the shaft 54 integrally, and the control pulley 48 Is rotated in the direction of arrow a in FIG. 29, and the control wire 40 moves to the hook 44 side.

The movement of the control wire 40 causes the movement shown in FIG.
At this time, the left and right document tables 1 are lowered, and the upper surface of each document table 1 (the document surface of the book BO in this example) is evacuated to a position below the document table unit 35 separated from the scanning unit 200. This retraction operation is executed when the power of the apparatus main body is turned on, when the apparatus does not perform scanning for reading, and when reading a document on the contact glass 206 disposed above the scanner unit 30.

Next, an operation of pressing the document table 1 above the document table unit 35 will be described. Contrary to the above-described retracting operation, in FIGS. 32 to 34, when the platen lifting / lowering motor 61 is driven so that the gear 56 rotates in the direction of arrow c, the shaft 54 moves in the direction opposite to the direction of arrow a in FIG. And the control pulley 48 is freely rotatable with respect to the shaft 54 by the action of the one-way clutch 51. Here, the force of the torsion spring 13 that pushes the document table 1 upward is set to be stronger than the force that pulls the control wire 40 downward.

Accordingly, when the control pulley 48 can freely rotate in the direction opposite to the direction of arrow a, the control wire 40 is moved by the force of the torsion spring 13 to push the document table 1 upward. Go to By the movement of the control wire 40, the right and left document tables 1 are raised in FIG. 34, and the document surface of the book document BO placed open on the upper surface of each document table 1 is pressed against the scanning unit 200. .

As described above, the right and left document tables 1 are raised,
When the platen elevating motor 61 is continuously driven in a state where the document surface on each platen 1 is pressed against the scanning unit 200, the one-way clutch 51 causes the shaft 54 to freely rotate with respect to the control pulley 48. As a result, the state of pressing the original surface against the scanning unit 200 is maintained. This pressurizing operation is executed only when the scanning unit 200 is on the document table 1 as described later.

As shown in FIG. 34, the platen pressing / fixing switching device and the platen retracting device include a pair of right and left platen
, And are independently controlled according to the moving position of the scanning unit 200. That is, a pair of right and left platen elevating motors 61, which are driving sources of the platen pressing / fixing switching device and the platen retracting device, are controlled by a microcomputer in the IPU 103 as shown in FIG. Are independently controlled through

FIG. 35 shows a retract operation of the document table 1 in the above-described retract operation mode, and FIG. 36 shows a timing chart thereof. In this retreat operation mode, I
Prior to the start of the movement of the scanning unit 200, the microcomputer in the PU 103 reverses the right and left platen elevating motors by a predetermined number of rotations, respectively, as shown in FIG. Lower down.
Thereafter, the microcomputer in the IPU 103 drives the scanner motor 106 to move the scanning unit 200 in a predetermined direction to perform scanning. If needed here,
This scanning is repeated many times. Then, when the microcomputer in the IPU 103 ends the evacuation operation mode,
Rotate the left and right platen lifting motors forward a specified number of times,
Return the left and right document tables 1 to their original positions.

Next, the pressing / fixing mode of the document table 1 will be described. When setting the book BO on the TPS, as shown in FIG. 37, the spine of the book BO is put on 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 BO is sandwiched between the inner ends of the left and right platens 1. In this state, each slide plate 3 is fixed by the size stopper 27, and The reading start page is opened, and the two-page spread original is set on the left and right original tables 1 and the scanner unit 30 is closed. Thereby, as shown in FIG. 27, the open / close lock claw 32 is engaged with the fixing pin 19, and the scanner unit 30 is locked to the document table unit 35 in a closed state. At this time, the opening / closing lock sensor 20 detects that the scanner unit 30 is closed.

By the way, at the end of the TPS operation,
The scanning unit 200 returns to the center home position shown in FIG. 39 (the center point of the set book BO). Therefore, also when the book BO is set on the TPS, the scanning unit 200 is located at the center home position. As a result, the book BO is set with reference to the center of the TPS, so that when the scanner unit 30 is closed, a book of any size can be reliably pressed, and the setability of the book is improved. You.

By setting the book original as the center reference in this way, the control timing (reading start;
(Reading end timing, page turning start timing, etc.)
Is relatively easy to take. Further, by setting the book original as the center reference in this way, the edge of the book original can be easily detected.

On the other hand, when reading a document set on the contact glass 206 of the scanner
As shown in FIG. 4, the right end of the scale 207 disposed on the left side of the contact glass 206 is used as an end surface 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 document, and the configuration is set to the minimum size.
That is, by setting the reference set position of the document as the end face reference, the reading start point of the document set on the contact glass 206 is always constant,
The 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 end home position detected by the end HP sensor. (FIG. 37), it waits until the reading conditions are input and the start button is pressed. Also, here, the scale 207 is disposed on the right side of the contact glass 206, that is, on the page turning start side of the book document, and the document is placed on both the document table 1 and the contact glass 206 and scanned by the scanning unit 200. The document on the contact glass 206 can be read at the same time as the page of the book on the document table 1 is turned.

In the case of this configuration, the optical path of the reading optical path of the scanning unit 200 is switched at the time of page turning scanning of the book document as described later. With this configuration, the scanning direction of the scanning unit 200 in the sub-scanning direction is the same on the original platen 1 and on the contact glass 206, and the sheet discharging direction at the time of printing is the same. It becomes unnecessary.

Further, the original BO is set on the original table 1, the sheet original SO is set on the contact glass 206, and the scanning unit 200 is scanned from the end home position to read the original BO on the original table 1. This scanning unit 2
While turning the pages of the book BO with the return scan of 00,
A mode for reading the sheet document SO on the contact glass 206 can also be set. In this case, even while the reading operation of the book BO is in progress, the reading operation of the book BO is interrupted by setting the sheet document SO on the contact glass 206 and setting the interrupt mode. Both documents can be read without having to do so. Here, the scale 207 is connected to the contact glass 206.
Regardless of which side is located above, the image obtained by reading the original on the contact glass 206 is mirror-inverted in the main scanning direction and stored in the frame memory 104.

In this example, the reference setting position of the document in the depth direction on the document table 1 and the contact glass 206 is configured such that the front side of the apparatus main body is used as an abutment reference. An original setting operation on the glass 206 is facilitated. Also, at the start of the operation of the scanning unit 200 in this example, the center H
The P sensor again confirms that the scanning unit 200 is at the center home position. When a start signal is sent from the operation panel 99, the scanning unit 200 moves to the left from the center home position,
It stops at the end home position detected by the end HP sensor.

FIGS. 37 to 41 show transition diagrams of the scanning unit 200 in the pressing / fixing mode of the document table 1.
FIG. 42 shows the timing chart. As shown in FIG. 37, the end home position of the scanning unit 200 is a reading page turning operation start point for the book BO and an operation end point thereof. In addition, at this end home position, the scanning unit 20
0 is not on the platen 1.

In the pressing / fixing mode of the document table 1, the scanner motor 106 of the scanning unit 200 is first rotated forward to move the scanning unit 200 rightward in FIG. Next, when the right document pressing roller 281a of the scanning unit 200 is applied to the left end of the book BO (point A in FIG. 38), the left document table elevating motor is rotated forward to add the left document table 1. Pressurize. As a result, the original BO is pressed against the scanning unit 200, and the optimal reading is performed.

As shown in FIG. 39, shortly before the scanning unit 200 reaches the book document center point, the right document pressing roller 281a is applied to the left end of the right document table 1 (point B in FIG. 42). . At this time, the right platen elevating motor is rotated forward to put the right platen 1 in a pressurized state. Next, the scanning unit 200 starts reading the right page of the book BO after passing through the book central point.

Thereafter, the left document pressing roller 281b is applied to the right end of the left document table 1 (point C in FIG. 42). At this point, stop the platen lifting motor on the left,
The left document table 1 is fixed. As a result, the original BO is pressed and fixed by the original pressing sheet 282 b without biting into the scanner unit 30, and keeps the same height until the next scanning unit 200 passes.

FIG. 40 shows the operating state of the scanning unit 200 during reading or turning a right page of a book. Scanning unit 200 that has read the right page of the book
41 is stopped in a state where the left document pressing roller 281b is over the right end of the right document table 1 (point D in FIG. 41), and then the scanner motor 106 is reversed to move the scanning unit 200 to the left direction in FIG. Move. As a result, the scanning unit 200 advances to the left while turning over the right page of the book BO, and shortly before reaching the book central point shown in FIG.
b extends to the right end of the document table 1 on the left side (point C). At this time, the left platen elevating motor is rotated forward to put the left platen 1 in a pressurized state.

Next, the scanning unit 200 starts an operation of passing the turned right page over the left page of the book BO after passing through the center point of the book. Thereafter, the right document pressing roller 281a is applied to the left end of the right document table 1 (point B). At this time, the right platen elevating motor is stopped, and the right platen 1 is fixed. As a result, the original BO is pressed and fixed by the original pressing sheet 282a without biting into the scanner unit 30,
The same height is maintained until the next scanning unit 200 passes. Thereafter, the scanning unit 200 moves to the end home position shown in FIG. 37 and stops.

Next, the configuration of the slider will be described.
FIG. 43 is an exploded perspective view of the configuration of the slider. A pair of pins 62 serving as a detection input unit for detecting a left and right page difference of the opened book original.
Are mounted on each rack 63 so as to be movable in a direction perpendicular to the sliding direction of the pair of racks 63.
As shown in FIG. 44, these pins 62 and racks 63 are arranged to face each other so as to sandwich the small gear 65a of the two-stage pinion gear 65, and each rack 63 is engaged with this small gear 65a. As a result, FIG.
In FIG. 4, each pin 62 moves closer to or away from each other, and the distance between the pins changes.
3 move in different directions from each other, and the two-stage pinion gear 6
5 rotates.

Here, each pin 62 can move in the Y direction in FIG. 44 together with each rack 63, and is always symmetrical with respect to the center of the two-stage pinion gear 65 due to the engagement between each rack 63 and the small gear 65a. In position. Further, as shown in FIG. 45, each pin 62 is moved in the X direction in FIG. 44 by fitting a base of each pin 62 into a regulating groove 83 formed in a cover (not shown). Are restricted so that they cannot move in the X direction when they are apart, and can move in the X direction when the pins 62 approach. Further, 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 is a sectional view of a connecting portion between the slider 78 and the document table 1. As shown in FIG. A hole is formed in the center of the large gear 64, and a two-stage pinion gear 65 is fitted into the hole from the back side, and a small gear 65 a of the two-stage pinion gear 65 meshes with each rack 63 on the front side. . Further, as shown in FIGS. 47 and 48, each pin 62 is fitted in a hole of each adjustment stud 4 fixed to the slide plate 3 of each document table 1. The large gear 64 meshes with a slide output gear 66 as shown in FIG. 49, and the large gear 64 and the slide output gear 66 are rotatably supported by a support plate 79, respectively. The gear ratio between the large gear 64 and the slide output gear 66 is set to 2: 1.

A large gear 65b of the two-stage pinion gear 65 is
As shown in FIG. 50, the small gear 67 of the pair of two-stage gears 67
a, and their gear ratios are set to 2: 1. The large gear 67b of the two-stage gear 67 meshes with a pair of cam gears 69 via an idle gear 68, respectively. These two-stage pinion gears 65, 2
The step gear 67 and the idle gear 68 are connected to the slide side plate 7.
Each stud (not shown) fixed to 0 is rotatably supported. Also, a pair of cam gears 6
Numerals 9 are rotatably supported by support plates 79 (FIG. 49).

As shown in FIG. 51, the slide output gear 66 has an adjusting groove 85 formed from the end of the boss portion to a portion beyond the center. Each cam gear 69 is
As shown in FIG. 52 and FIG. 53, each of them is formed in a cylindrical shape, and one of the openings has a spiral pin moving groove 8.
Six perforated surfaces are provided respectively. As shown in FIGS. 52 and 53, the slide output gears 66 are fitted into the cylindrical portions of the cylindrical cam gears 69, respectively. An output pin 7 to be described later
5 are fitted.

The position of the opening formed by the intersection of 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. The movement amount of the output pin 75 is set to move by half of the movement amount of the pin 62. When the cam gear 69 and the slide gear 66 rotate at the same time, the 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 the opening is set to be の of the radius of the circular motion of the pin 62 when the large gear 64 rotates.

On the other hand, outside the slide side plate 70, FIG.
As shown in FIG. 3, three vertical slide pins 71 are fixed, and these vertical slide pins 71 are, as shown in FIG.
a is slidably supported by each of them. Thereby, the slide side plate 70 can be moved in the vertical direction with respect to the horizontal slider plate 72. Further, outside the horizontal slide plate 72, three horizontal slide pins 73 are fixed,
These horizontal slide pins 73 are slidably supported by two horizontally long holes 74a formed in the fixing plate 74 (FIG. 55). Thereby, the horizontal slide plate 72 is
It becomes movable in the left-right direction with respect to the fixed plate 74.

The pair of output pins 75 are shown in FIGS.
As shown in FIG. 7, each of the two vertical guide pins 76 is fixed to each pin holder 77. These vertical guide pins 76 are provided with two vertically long holes 74 b formed in the fixing plate 74.
Each of the output pins 75 passes through two vertical guide holes 74 c formed in the fixing plate 74, and is connected to the adjustment groove 85 of the slide gear 66 and the pin of the cam gear 69. The moving groove 85 is fitted into an opening formed by crossing each other. Thus, each pin holder 77 can move up and down with respect to the fixed plate 74, and each output pin 75 can move up and down together with the gear group described above.

The slider 78 constructed as described above
Using the pair of pins 62 as an input unit, the thickness of the book BO,
The page difference between the left and right pages when the spread is detected is detected, and the reading center of the spread book original (a valley formed at the binding portion of the book original) is detected.
The original BO can be moved together with the original table 1 using each output pin 75 as an output unit so that the original BO always faces a predetermined position on the original table 1.

Next, the movement of the original and the slider 78
The operation of will be described. As shown in FIG. 56, when the book BO is spread upward and its page contents are read, the cover 90 of the book BO is set so that the left and right pages (reading surfaces 89) of the book BO are flush with each other. And on the back cover 91,
When a force is applied from the lower side, the spine 88 of the book BO is inclined due to the left and right page difference. As a result, when viewed from the reading surface side of the book document, the reading center S point (the valley formed at the binding portion BOa of the book document) of the spread book document is shifted horizontally by a distance X1 from the center P point of the spine 88. Shift.

By setting the reading range of the scanning unit 200 to a specific range in advance as in this example, the reading control of the scanning unit 200 can be simplified. However, in this way, the scanning unit 20
When the reading range of 0 is set to a specific range in advance,
Since the center point of the reading range of the scanning unit 200 is always located at the center P of the spine 88 of the book, the reading center S of the spread book is set at the center P of the spine 88 as described above. If it is shifted from the point, the read image of the scanning unit 200 is shifted by the shift amount (distance X1) of the reading center S point of the two-page spread original. Therefore, in this example, as a means for correcting the shift amount of the reading center S point of the two-page spread original, the slider 78 described above uses a direction opposite to the direction in which the reading center S point of the book original is shifted, that is, the S direction. The distance X1 corresponding to the shift amount of the reading center S point in the direction in which the point and the center P point of the spine cover 88 match.
Only the original BO is moved together with the original table 1.

In FIG. 56, the inclination of the spine 88 is represented by TH.
1. Assuming that the thickness of half of the total thickness BF of the book original is R1, and the horizontal shift amount between the reading center S point of the facing book original and the center P point of the spine 88 is X1, X1 = (R1 / 2) × Sin (2 × TH1).

Accordingly, the slider 78 detects the thickness R1 of の of the total thickness BF of the book original and the inclination TH1 of the spine 88, and obtains the reading center S point of the spread book original from the above equation. A horizontal shift amount X1 with respect to the center point P of the spine cover 88 is calculated, and a shift amount X1 of the read center S point is calculated in a direction opposite to the shift direction of the read center S point of the book document.
By moving the book BO together with the platen 1, the scanning range of the scanning unit 200 can always be set to a constant range, and the scanning control of the scanning unit 200 can be simplified. The slider 78 implements the above-described correction of the displacement X1 of the reading center S point by the operation shown in FIGS. 57 and 58. Here, FIG. 57 shows the positional relationship between the pin 62 and the output pin 75 when the pages of the book document are opened equally to the left and right.

In FIGS. 57 and 58, the distance between the two pins 62 supported by the large gear 64 is set to the total thickness BF of the book BO. That is, when the original BO is set on the pair of left and right original tables 1, the size stopper 27 is released, and the spine 88 of the original BO is sandwiched between the central ends of the original table 1 on the apparatus body side. , This size stopper 2
When the stop 7 is stopped, the distance between the centers of the adjustment studs 4 fixed to the slide plate 3 of each document table 1 becomes exactly the total thickness BF of the book document BO. Thus, by the action of a cam gear 69 described later, the center of each slide output gear 66 and each output pin 75
Is 1/4 of the total thickness BF of the book BO (R
2 = R1 / 2).

As described above, the gear ratio between the large gear 64 and each of the slide output gears 66 becomes 1: 2 due to the gear ratio, and therefore, as shown in FIG.
When 4 rotates by an angle of TH1, each slide output gear 66 rotates by twice the angle TH2 of the large gear 64. At this time, the rotation directions of the large gear 64 and each slide output gear 66 are opposite to each other.

Accordingly, the horizontal distance ΔR2 × Sin (TH) between the center of the slide output gear 66 and each output pin 75 fitted to the slide output gear 66
2)｝ is (R1 / 2) × Sin (2 × TH1)
And the reading center S point of the two-page spread original and the spine 88
Is the amount of deviation X1 in the horizontal direction from the central point P. Here, the movement of each output pin 75 in the horizontal direction is restricted by the pin holder 77 and the fixing plate 74 as shown in FIG. Moves relative to each document table 1 and book document BO by the horizontal distance, that is, the displacement amount X1, in the direction opposite to the displacement direction.

FIG. 59 is a mechanism diagram for explaining the relationship between the amount of movement between each pin 62 and each output pin 75. Each pin 62 is connected to each platen 1 as shown in FIGS.
Of the respective adjustment studs 4 fixed to the slide plate 3. When one of the pins 62 moves toward the center of the apparatus main body by a distance F, the other pins 62 move toward the center of the apparatus main body by the same distance F by the action of each rack 63 and the two-stage pinion gear 65. 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
Are rotated in opposite directions by a rotation angle that is twice the rotation of the two-stage pinion gear 65. Thereby, each cam gear 69
Are rotated relative to the adjustment grooves 75 of the stopped slide output gears 66, respectively, and the positions where these two grooves intersect each other, that is, the position of each output pin 75 is , Each of which moves in the center direction by an amount equal to の of the moving distance F of the pin 62. The size of each rack 63 and each gear and the spiral shape of each pin moving groove 86 are set so as to satisfy the above conditions.

With these settings, the large gear 64 rotates without changing the distance between the pins 62, and the two-stage pinion gear 6
5 also rotates together, the slide output gear 66 and the cam gear 69 rotate by the same rotation angle in the same direction, so that the pin movement groove 96 of the cam gear 69 and the adjustment groove 85 of the slide output gear 66 Are located at openings where they intersect each other, that is, the output pins 7
The position of No. 5 rotates without moving in the radial direction of the slide output gear 66 (without changing R2), and the set value does not shift during operation, and the reading center (S point) of the two-page spread original is always shifted. It can be corrected to a fixed position (point P).

As shown by a broken line in FIG. 45, when the distance between the pair of pins 62 is small, the slider 78 is positioned at the reading center (S point) of the above-mentioned double-page spread original. Since the load due to the correction operation increases,
The regulating groove 83 of each pin 62 is formed large at the center so that the two document tables 1 can freely move up and down without performing a correction operation.

The above-described correction of the reading center (point S) of a two-page spread original can be realized by a method different from that of the slider 78 described above. For example, a thickness input device or a detection device of the book BO, a platen position detecting device or a spine inclination detecting device, a platen lateral movement driving device (for example, as shown in FIG. 1 is a linear feeder that rotates a feed screw 93 that is transversely mounted along the direction of movement of the feed roller 1, moves a feed female screw 94 screwed with the feed screw 93, and laterally moves the document table 1 integrated with the feed female screw 94. ), The shift amount X1 may be calculated based on the above-described calculation formula, and each original table 1 may be moved by this shift amount X1 to eliminate each shift. However, since the slider 78 does not use an electric device, the running cost is not required, and a device for correcting this deviation amount can be provided at low cost.

Next, the configuration of the scanner unit 30 will be described.

FIG. 34 shows a TPS (Turn the P).
1 shows an overall configuration of an image scanner (page scanner). In the TPS, a contact glass 206 is disposed on the upper part of the apparatus main body. An original such as a sheet or a thick original is set on the contact glass 206 by a pressure plate (not shown), and an optical path switching described later is performed. By scanning the original with the scanning unit 200, the original image on the contact glass 206 can be read. The upper half of the main body of the TPS is a scanner unit 30, and the scanning unit 200
And scans the original while traveling in the left-right direction. FIG. 61 shows a configuration diagram of a scanning drive system of the scanning unit 200.

FIG. 61 shows a scanning drive system of the scanning unit 200 as viewed from above the apparatus main body. The timing belt 312 has a pulley 304 and a three-stage pulley 30 at the back of the apparatus main body.
2, a timing belt 31 is provided on the front side of the apparatus main body.
3 is stretched in the left-right direction by a pulley 305 and a two-stage pulley 306, respectively. Pulley 304 and pulley 30
The rotation shaft 5 is supported by a spring 307 and a spring 308, respectively, and applies a predetermined tension to each of the timing belts 312 and 313.

The three-stage pulley 302 is connected to the timing belt 3
10 and a two-stage pulley 306 by a timing belt 311.
The timing belt 311 connects the idler 303 with the spring 30.
A predetermined tension is obtained by pulling outward at 9. The scanning unit 200 has its back side and front side fixed to the timing belts 312, 313 by clamps 315, respectively.
2 and 313.

FIG. 62 shows the configuration of the scanning unit 200. Document holding rollers 281a and 281b are rotatably supported on the lower left and right sides of the scanning unit 200, and sheet winding rollers 280a and 280b are rotatably supported outside thereof. Each sheet take-up roller 280a,
280b includes left and right independent document pressing sheets 282a,
The central end of each of the sheets 282b is wound up, and the outer ends of the document holding sheets 282a and 282b are fixed to side plates of the scanner unit 30, respectively. These document holding sheets 282a, 282a
Reference numeral 82b is a sheet-like member in which a rubber-based resin is melted from both sides into a cloth (cloth) woven with tetron yarn. Has a difficult structure.

The sheet take-up rollers 280a, 280a
80b has a double structure as shown in FIG. 63 showing one of the structures, and the take-up roller shafts 251a, 251
b, cylindrical sheet take-up rollers 280a, 280b
, Spring springs 252a and 252b are attached. Thereby, the take-up roller shaft 251
By rotating the document holding sheets a and 251b further than the state where the document holding sheets 282a and 282b are stretched, a certain amount of tension can be applied to the document holding sheets 282a and 282b by the action of the mainspring springs 252a and 252b.

Further, as shown in FIG. 64, sheet winding gears 232a and 232b are fixed to the outer ends of the winding roller shafts 251a and 251b, and these sheet winding gears 232a and 232b are Each of the idle gears 2 is fixed to a drive rack 231 having right and left ends fixed to a side plate of the scanner unit 30 and having teeth over substantially the entire length.
They are in mesh 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 springs 2
52a, 252b and each sheet take-up roller 28
0a, 280b, each document holding sheet 282a,
282b is pulled out and taken up, and the tension of the left and right sheet take-up rollers 280a, 280b is constantly increased.
It is kept almost constant.

At this time, each original holding sheet 282a, 2
82b, each sheet take-up roller 280a,
Each sheet take-up roller 280a, 280a, which is generated depending on the position of the scanning unit 200 due to the thickening of the winding 280b.
Original holding sheets 282a and 282 wound around 80b
The outer peripheral difference of b is absorbed by the respective springs 252a and 252b.

On the other hand, as shown in FIG. 62, a platen glass 205 for reading the original document and a turning belt 208 for turning the pages of the original document are disposed between the original pressing rollers 281a and 281b. The platen glass 205 for reading the original is arranged on the upstream side of the scanning unit 200 in the scanning direction, and the turning belt 208 for turning over the pages of the original is arranged on the downstream side of the scanning unit 200 in the scanning direction. I have. By arranging in this way, the approaching section for reading scanning of the scanning unit 200 can be lengthened, and the scanning can be stabilized. In this example, the page turning mechanism is arranged on the lower side in the same unit, and the reduction optical system is arranged on the upper side, thereby realizing the miniaturization of the apparatus.

Further, with this configuration, the scanning unit 200 receives the book original (detailed later) pressed by the left original pressing roller 281b and the turning belt driving roller 223, and receives these originals. Since the document surface (reading surface 273) positioned between the rollers can be read, an optimal image can be obtained. At this time, platen glass 2
As shown in FIG. 65, the lower surface position of the left original pressing roller 2 is adjusted in advance to allow for the floating of the original surface.
The lowermost point of the lowermost point 81b and the lowermost point of the turning belt drive roller 223 are set slightly higher than a horizontal plane (reading surface 273) formed by the gap α. This 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 side of the platen glass 205 is supported by a glass holder 269. Further, a glass chamfer 271 is provided at the lower end of the platen glass 205, and a holder chamfer 270 is provided at the outer lower end 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 located slightly higher than the lower surface of the glass holder 269 by a height β, and during operation of the scanning unit 200, the platen glass The end of the page of the book original is not caught on the side of the document 205.

On the other hand, inside the platen glass 205,
As shown in FIG. 62, two fluorescent lamps 20 for illuminating a book original are used.
Reference numerals 1 and 202 are disposed on the left and right sides of the book original reading unit, respectively. The original image illuminated by these fluorescent lamps 201 and 202 is shown in FIG.
9, the second mirror 220 and the third mirror 221
, And finally transmitted through the lens 216, CC
A reduced image is formed on D101. In addition, the turning belt 20
8 is a turning belt driving roller 223 and a turning roller 2
The charging roller 225 is disposed in contact with the upper side of the turning belt 208 and outside a portion slightly away from the turning belt driving roller 224.

As shown in FIG. 64, a turning belt driving gear 234 is fixed to the end of the driving shaft of the turning belt driving roller 223. The turning belt driving gear 234 is connected via an idle gear 235. , And the drive rack 232. Thereby, the scanning unit 2
00 travels along with the idle gear 235 along the drive rack 232, the turning belt driving gear 234 rotates, and the turning of the turning belt driving roller 223 causes the turning belt 2 to move at the same speed as the moving speed of the scanning unit 200.
08 rotates.

When reading the original set on the contact glass 206, the switching mirror 222 retracted to a position outside the reading optical path of the scanning unit 200 as shown in FIG. By the operation of 255, the scanning unit 200 is moved to a position where it has advanced into the reading optical path as shown in FIG. By the movement of the switching mirror 222, FIG.
As shown in FIG. 8, the first mirror 219 and the second mirror 220
Is switched from the side of the platen glass 205 shown by the broken line to the side of the contact glass 206 shown by the solid line, and the original image on the contact glass 206 illuminated by the two fluorescent lamps 203 and 204 becomes the original document. As in the case of (1), the light is alternately reflected by the second mirror 220 and the third mirror 221 and transmitted through the lens 216 to form a reduced image on the CCD 101.

The switching mirror 222 is supported by a switching mirror bracket 257, as shown in FIG. 67. The switching mirror bracket 257 is rotatably supported by an upper fulcrum 258 of an optical path adjusting plate 259. . The keep solenoid 255 is disposed at the end of the switching mirror bracket 257 opposite to the support side of the switching mirror 222, and the keep solenoid 2
By turning on / off 55, the switching mirror bracket 257 is swung about the upper fulcrum 258 of the optical path adjusting plate 259 as an axis between a position shown by a broken line and a position shown by a solid line in FIG.

Thus, as described above, the position of the switching mirror 222 is changed to the scanning unit 200 shown in FIG.
Is selectively moved to a reading position of the original document retracted from the reading optical path of the sheet unit and a reading position of the original document sheet advanced into the reading optical path of the scanning unit 200 shown in FIG. Here, the retracted position of the switching mirror 222 outside the optical path (the broken line position in FIG. 67) is not particularly restricted depending on the movement of the keep solenoid 255, but the advance position of the switching mirror 222 into the optical path (FIG. 67). (Solid line position in FIG. 3) restricts the swing of the switching mirror bracket 257 with the positioning pin 256, and
The stop position in the optical path is regulated.

The switching mirror 222 is configured to adjust the switched optical path. That is, the optical path adjustment plate 259 is, as shown in FIG.
The lower part of the unit body is rotatably supported by a lower fulcrum 262, and a spring 260 is provided in contact with both sides between the upper fulcrum 258 and the lower fulcrum 262.
And the adjustment screw 261 to support it substantially vertically.

The optical path adjusting plate 259 is urged by a spring 260 to rotate in the direction in which the mirror 222 is displaced in a direction in which the flat fulcrum 258 is switched.
The rotation position of the optical path adjustment plate 259 due to the rotation behavior is determined by the head of the adjustment screw 261 arranged on the side of the arm facing the spring 260 abutting on the side of the optical path adjustment plate 259. Therefore, this optical path adjusting plate 259
By rotating the adjusting screw 261, the lower fulcrum 2
By changing the position of the upper fulcrum 258 about the axis 62 and displacing the position of the switching mirror bracket 257 supported by the upper fulcrum 258,
Can be moved to adjust the switched optical path.

In the optical system of the scanning unit 200, the mirrors other than the switching mirror 222 do not have the optical path adjusting function as described above, and the adjustment of the optical path for reading the original on the platen glass 205 side is performed by adjusting the position of the CCD 101. The adjustment of the optical path for reading the original on the side of the contact glass 206 is performed by the above-described method.
Is adjusted by adjusting the position. Thus, in the optical system, the number of adjustment points can be reduced, and the assemblability and maintainability can be improved. Further, in the optical system of this example, the keep solenoid 255 and its connecting elements are housed in the scanning unit 200, and the optical system is removed together with the scanning unit 200 when the optical system element is replaced, so that the maintenance performance is improved. Has been improved.

The above-described optical path switching system may be configured as an optical system using a switching mirror rotation system as shown in FIG. In this example, a switching mirror bracket 264 supporting the switching mirror 222 is rotatably supported at a fulcrum 265 on the unit body of the scanning unit 200. The solenoid 263 is disposed at an end of the switching mirror bracket 264 on the side opposite to the support side of the switching mirror 222. When the solenoid 263 is turned on / off, the switching mirror bracket is switched in a direction opposite to the solenoid 263. Spring 26 pulling 264
6, the switching mirror bracket 264 is
With reference to the fulcrum 265 as an axis, the swinging motion is performed between a position indicated by a broken line and a position indicated by a solid line in FIG.

Thus, the position of the switching mirror 222 is different from the original reading position indicated by the broken line in FIG.
Is selectively moved to the sheet original reading position indicated by the solid line. Here, when switching the optical path of the mirror 222 to the optical path for reading the original through the platen glass 205, the switching mirror 222 is applied to the positioning pin 268, and the stop position of the switching mirror 222 is set to the broken line position in FIG. It is regulated so that it becomes.
When switching the optical path of the mirror 222 to the optical path for reading the sheet original through the contact glass 206, the switching mirror 222 is applied to the positioning pin 267, and the stop position of the switching mirror 222 is set to the solid line position in FIG. It is regulated so that it becomes.

Next, the turning operation of the scanner unit 30 will be described. FIG. 70 is a view for explaining the operation of the page turning section of the scanning unit 200. The turning belt 208 is made of PET, PC, PVC, or the like, and its surface layer is formed of a high-resistance film having a surface resistance of 10 ¹⁴ Ω or more, and its back layer is formed of a low-resistance film having a surface resistance of 10 ⁸ Ω or less. It is composed of a structured resin film.

Further, the turning belt driving roller 223 is
It consists of a grounded metal roller coated with conductive rubber on the surface, and achieves reliable belt drive and grounding. Further, the charging roller 225 is formed of a metal roller, and a high voltage of ± 2 kV is applied to the charging roller 225 from the AC power supply 253 at a predetermined timing via a changeover switch 253a.

In FIG. 70, the changeover switch 253a is turned on at a timing described later while the scanning unit 200 is running and the turning belt 208 is driven, and a high voltage of ± 2 kV is applied to the charging roller 225 from the AC power supply 253. An alternating electric field is generated on the surface of the turning belt 208, and the action of the alternating electric field causes the uppermost page 2 of the book BO to come into contact with the surface of the turning belt 208.
Attraction force for adsorbing 54 is generated.

When the reading operation of the original is started,
As shown in FIG. 37, the scanning unit 200 located at the left end home position of the scanner unit 30 starts traveling rightward in FIG. When the document reading position of the platen glass 205 of the scanning unit 200 is on the left page of the book BO, as shown in FIG. 71, the optical system of the scanning unit 200 starts reading the book BO. The manuscript surface of the book manuscript BO is read from the left page to the right page.

The reading start position of the scanning unit 200 here varies depending on the size (size) of the book BO, and also differs from the reading start position of the document on the contact glass 206 (reference end of the scale 207). Thus, the optical system of the scanning unit 200 is
72, the scanning direction of the original of the scanning unit 200 is reversed as shown in FIG. 72, and as shown in FIG. 73, the page turning operation of the right page of the book BO having been read is completed. Is started.

When starting to turn the pages of the book BO, a turning belt 208 and a page feed roller 25 to be described later are used.
70 is located at the position shown by the broken line in FIG. 70, and prior to this page turning operation, the charged pattern portion formed on the surface of the page turning belt 208 has the topmost page 25 of the book BO.
Overlap 4 Then, as shown in FIG. 73, when the leading end of the uppermost page 254 exceeds the lower center of the turning belt 208, the turning belt 208 and the page feed roller 250 are actuated by the action of a solenoid (not shown). 70 is moved to the position shown by the solid line in FIG. Thus, only the top page 254 of the book BO is adsorbed on the surface of the turning belt 208 by the attraction force due to the uneven electric field of the charge pattern formed on the surface of the turning belt 208, and the top page The end of 254 is a turning belt 20
Lifted with 8. The attraction force due to the uneven electric field has a characteristic that pages other than the top page 254 are not attracted.

Here, as shown in FIG. 77, the timing of the charging of the turning belt 208 is determined by the scanning unit 200 which returns upon completion of reading the original surface of the original BO.
Is set to start charging the turning belt 208 together with the return operation of the scanning unit 20.
The operation of 0 is efficient without waste. However, as shown in FIG. 77, the distance L1 from the document reading position of the scanning unit 200 to the lowermost point of the turning belt driving roller 223.
Is larger than the distance L2 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 driving roller 223 (L1 ≧ L2), the scanning unit 200 performs the return operation. After the start, the charging of the turning belt 208 may be started later.

As described above, the top page 25 of the book BO
After turning up the scanning unit 4, the scanning unit 20 remains in this state.
0 is moved toward the end home position as shown in FIG. 73.
As shown in FIG. 74, a pair of upper and lower page guides 22 disposed on the right side of the scanning unit 200 are reliably transported by being interposed between the turning roller 224 and the page feed roller 250.
7, 228 (FIG. 62) and scan unit 2
00 is sent out to the right outside. At this time, a page turning sensor 214 (FIG. 62) mounted on the page guide 227 on the upper side of the scanning unit 200 detects a document page sent to the right outside of the scanning unit 200, and this document page is detected. It is determined that the page has been turned normally.

As is apparent here, in this example, the original page turned up by the page turning operation of the scanning unit 200 is held in a natural posture without being rounded or bent. The scanning unit 200 can be reduced in size because there is no need to arrange page storage means for storing the turned-up original page in the scanning unit 200 without damaging the raised original page.

Next, as shown in FIG.
When the top page 254 is turned up to the binding portion of the book document, the turning belt 208 and the page feed roller 250 are returned to the original positions (the broken line positions in FIG. 70). In this state, when the scanning unit 200 is further moved toward the end home position, as shown in FIG. 76, the turned-up original page is pulled by the binding section of the book original, and a pair of page guides is provided. While returning between 227 and 228, the document BO is discharged from the scanning unit 200 so as to be superimposed on the left page of the book BO.

When the turned-up original pages are all superimposed on the left page of the book BO, the scanning unit 200 completes one original reading / page turning operation for a two-page spread original. Here, this book manuscript BO
As described above, when repeatedly performing the document reading / page turning operation on the document, or repeatedly performing only one of the document reading and the page turning operation,
At the same time, the turned-up document pages are all superimposed on the left page of the book document BO, and at the same time, the moving direction of the scanning unit 200 is reversed so that the reciprocating operation of the scanning unit 200 is performed in the shortest course with respect to the document surface of the book document. repeat.

Next, the configuration of the scanning rail of the scanning unit 200 will be described. The scanning unit 200 is shown in FIG.
As shown in the figure, the scanning optical system unit 336 in which the above-described optical system is disposed is provided with two scanning side plates 337a and 337b disposed on the near side and the back side of the scanner unit 30. And a single support rod 344b on the back side are rotatably supported. Accordingly, the scanning unit 200 follows the relative twist of the pair of scanning side plates 337a and 337b disposed on the near side and the back side, and the scanning optical system unit 336.
Scanning optical system unit 3 so that it does not twist
36 is configured to learn only with respect to the scanning side plate 337a disposed on the near side.

On the other hand, on the side plate of the scanner unit 30,
Two scanning rails 343a and 343b parallel to each other are arranged on the front side and the back side, with their left and right ends fixed. These scanning rails 343a, 343
b has a substantially L-shaped cross section, and roller brackets 338a and 338b are provided with respective scanning side plates 337a and 337a so as to surround these scanning rails 343a and 343b.
337b.

The roller brackets 338a, 338
b, positioning rollers 339a, 339b are sandwiched between the horizontal portions of the scanning rails 343a, 343b.
And the holding rollers 340a and 340b are provided rotatably.

Here, the positioning rollers 339a, 339
b serves to determine the vertical position of the scanning unit 200 at the time of reading a book document and turning a page, and two are arranged on each of the scanning side plates 337a and 337b. On the other hand, each holding roller 340
a and 340b are configured to press the horizontal portions of the scanning rails 343a and 343b from above.

That is, these holding rollers 340a, 3
As shown in FIG. 79, 40b is rotatably supported by a free end of a holding roller bracket 346 formed in a substantially bell crank shape. This presser roller bracket 346
The central part of each roller bracket 338a, 338
The shaft is rotatably supported by a stud 347 fixed to b. Also, between the base end of the press roller bracket 346 and each roller bracket 338a, 338b,
A pressure spring 345 is stretched. Accordingly, each pressing roller 340a,
0b presses the horizontal portion of each scanning rail 343a, 343b from above.

The pressing of the pressing rollers 340a and 340b against the horizontal portions of the scanning rails 343a and 343b causes the scanning unit 200 to apply the scanning unit 30
The positioning behavior of the scanning unit 339a and 339b abuts on the lower surface side of the horizontal portion of each scanning rail 343a and 343b. 200 is positioned.

The scanning unit 200 includes a horizontal pressing roller 341 rotatably supported by a roller bracket 338a on the front side, and the pressing rollers 340a and 340b.
Roller bracket 338b on the back side by the same pressure structure as
A horizontal pressing roller 342 for pressing the inner side of the scanning rails 342 is disposed so as to sandwich the horizontal portions of the scanning rails 343a and 343b from both outer sides, thereby positioning the scanning rails 343a and 343b in the depth direction.

FIGS. 80 to 83 show page feed rollers 250.
The configuration and operation of the embodiment will be described. The page feed roller 250 is shown in FIG.
As shown in FIG. 81, a plurality of rollers are fixed at predetermined intervals on a portion of the shaft 248 corresponding to the width of the turning belt 208. The page feed roller 250 is formed of a soft resin such as polyurethane foam or a material such as rubber.

On the other hand, the width of the turning roller 224 is formed to be larger than the width of the turning belt 208, as shown in FIG.
As shown in (2), both ends of the turning roller 224 extend outside the turning belt 208. Drive rollers 249 each having a diameter slightly smaller than the diameter of the page feed roller 250 are fixed to the shaft 248 so as to correspond to the extending portions at both ends of the turning roller 224. The drive roller 249 is provided with a page feed roller 250.
It is formed of a material such as rubber having a higher degree than that of rubber.

When the page feed roller 250 is retracted to the position shown by the broken line in FIG. 70, the tip fits into the concave portion of the lower page guide 228 formed in a comb-like shape (when viewed from the side). (Overlapping each other).
When the turning belt 208 is raised to the position shown by the solid line in FIG. 70, the page feed roller 250 also moves to the position shown by the solid line in FIG. In contact with each other, a part of the peripheral surface of the page feed roller 250 moves to a position where it is slightly pressed by the turning belt 208.

As a result, the page feed roller 250 is
As shown in FIG. 1, the conveying force for the original page turned up by the turning belt 208 by being deformed by the diameter difference from the driving roller 249 is given to the page feed roller 250. Further, the rotational force on the page feed roller 250 is given by transmitting the rotational force of the turning roller 224 via the driving roller 249 abutting on the same. At this time, the driving roller 249 rotates at the same peripheral speed as the turning roller 224 that is in contact, but the page feed roller 250 rotates at a higher peripheral speed by an amount larger than the diameter of the driving roller 249. As a result, “the linear speed of the page feed roller ≧ the linear speed of the turning belt” is satisfied, and a reliable page conveyance force for the turned-up original page is obtained. On the other hand, as shown in FIG. 76, when the turned-up original page is discharged from the scanning unit 200, the page feed roller 250 and the turning belt 208 are retracted to the positions indicated by the broken lines in FIG.

The page feed roller 25 configured as described above
The operation of 0 is controlled by the toggle joint device shown in FIGS. As shown in FIGS. 82 and 83, a shaft 248 which is the center of rotation of the page feed roller 250 has a toggle lever 274 formed in a bell crank shape.
Is rotatably supported at one end. The toggle lever 274 is rotatably supported by the scanning unit 200 at a fulcrum 275. Also, the scanning unit 200
A tension spring 279 is stretched between the fixed pin 276 and the shaft 248 implanted in the shaft. Is configured.

In this toggle mechanism, as shown in FIG. 82, the page feed roller 250 is retracted from the turning belt 208 to the position shown by the broken line in FIG. 70, and the turning roller 224 is shown by the solid line in FIG. When the ascent is started toward the position shown, the rotation shaft 224a of the turning roller 224 is turned on.
Engages with the other end of the toggle lever 274 and further rises while rotating the toggle lever 274. At this time, the rotation of the toggle lever 274 causes the shaft 2
Until 48 exceeds the neutral line 278, the contracting force of the spring 279 tries to return the page feed roller 250 to the original position. However, when the shaft 248 exceeds the neutral line 278, the contracting force of the spring 279 is reduced. , And acts so as to bring the page feed roller 250 into contact with the turning roller 224. As a result, as shown in FIG.
When the spring 27 has been lifted to the position shown by the solid line in FIG.
Due to the contraction force of No. 9, each drive roller 249 comes into contact with each end extending portion of the turning roller 224, and moves to a position where a part of the peripheral surface of the page feeding roller 250 is slightly pressed by the turning belt 208. .

On the other hand, as shown in FIG. 76, when the turned-up original page is discharged from the scanning unit 200,
By the operation of retracting the turning roller 224 to the position shown by the broken line in FIG. 70, the turning roller 224 descends from the position shown in FIG. 83 while pressing the drive roller 249.
As a result, when the shaft 248 crosses the neutral line 278, the contracting force of the spring 279 acts in a direction to retract the page feed roller 250 to the position shown by the broken line in FIG. 70, and the page feed roller 250 is moved as shown in FIG. The turning roller 224 is returned to the original position.

As described above, the page feed roller 250 moves from its retracted position in the direction in which it comes into contact with the turn belt 208 in conjunction with the upward drive of the turn belt 208. Inexpensive and small in size. The movement of the page feed roller 250 is as follows.
After the turning belt 208 starts to be lifted, it is started with a certain time lag (in the latter half of the rising of the turning belt 208), so that the end position of the document page turned up by the turning of the turning belt 208 is turned. Belt 20
8, the turning belt 208
The end of the document page can be reliably sandwiched between the scanning unit 200 and the page feed roller 250, and the margin of the page turning operation of the scanning unit 200 is improved.

In this example, as described above, the scanning unit 2
Every time the scanning of 00 is performed, the regulation of the pressurized platen is released, and the pressurized platen is pressed against the scanning unit 200 with a spring property so that the uppermost page of the booklet is placed in a uniform plane. The displacement in the direction is automatically corrected. Further, by moving the leading and trailing end positions of the image and the page turning position by repeating the page turning, the movement of the end of the book original in the left-right direction is corrected.

Next, detection of the right end portion of the book document in the sub-scanning direction will be described. FIG. 84 shows data of the right edge detection of the double-page spread original by the reading sensor 101 in the image reading method before the first page turning, and the detected right edge of the double-page original is a reading sensor when the double-page spread original is size A3. The position of 101 is approximately 21 from the center set position.
This is the position of 0 mm. FIG. 90 shows the data of the right end detection of the double-page spread original by the reading sensor 101 in the image reading method before the first page turning, and the right end of the detected book original is the sub-scan when the double-page spread original is size B4. The position is approximately 180 mm from the center set position in the direction position.

At the time of page turning scanning after image reading scanning,
Edge detection is started from the position of the platen outer frame, and the reading sensor 101 reads the platen outer frame first, and then reads the black platen. The reading sensor 101 reads the step between the inside of the right cover and the end of the page in the book document,
Next, the background density, which is the margin of the uppermost page, is read, and the image is read after a margin of generally more than ten millimeters. Continuous data from the reading sensor 101 in the sub-scanning direction is sampled and compared with a threshold value. The start of the margin of the uppermost page is detected, and the position is determined as a page edge.

FIG. 85 shows a circuit for detecting the right end of a book original. This book original right end detection circuit detects the right end of the book original in the sub-scanning direction based on a change in read information by a specific pixel of the reading sensor 101 in the sub-scanning direction. Reading sensor 1
The specific pixel 01 in the main scanning direction is set to the 1024th pixel of 64 mm from the reference of the reading sensor 101 in front of the apparatus in order that the reference position of the original document corresponds to the minimum original size on the near side. The counter 401 is reset by a synchronization signal LSYNC synchronized with the main scanning of the reading sensor 101,
The clock CLOCK synchronized with the pixel signal from the reading sensor 101 is counted, and an output signal that rises in synchronization with the 1024th pixel signal from the reading sensor 101 is output.

The data latch circuit 402 includes a counter 401
The pixel signal of the 1024th pixel in the image signal DATA from the reading sensor 101 is latched for each main scan at the rising edge of the output signal. Digital comparator circuit 40
Reference numeral 3 compares the upper 4 bits of the 8-bit data latched by the data latch circuit 402 with a threshold value. This threshold is set by a microcomputer in the IPU 103. The data from the digital comparator circuit 403 is delayed by one main scanning time in the D flip-flop circuits 404 and 405, and the AND circuit 406 ANDs the data from the digital comparator circuit 403 and the data from the D flip-flop circuits 404 and 405. When the value of the data of the specific pixel of the reading sensor 101 is larger than the threshold value for three consecutive pixels in the sub-scanning direction, a detection signal is generated to notify the microcomputer in the IPU 103.

In the reading operation for detecting the end of the original, the microcomputer in the IPU 103 starts scanning of the scanning unit 200 to the left from the black original platen 1 or the outer frame of the original 1 at the right end of the scan. And the data latch circuit 402 and the D flip-flop circuits 404 and 405
The reset signal RESET at the start of the detection is released. Then, a striped portion continuous in the main scanning direction due to the cover of the original or the edge of the paper is detected by the reading sensor 101, and image information on the right side of the uppermost page end of the original is randomly detected.

The background of most books is white, and generally, there is no character or image in the frame portion which is more than 10 mm from the edge of the book original. Therefore, when the pixel signal of the 1024th pixel from the reading sensor 101 becomes uniform white color data equal to or larger than the threshold value, the digital comparator circuit 403 determines that it is a blank portion of the page and detects it. The accuracy of this determination is improved by using data of a plurality of pixels in the main scanning direction of the reading sensor 101.
The number of pixels for the determination is determined by the D flip-flop circuit 40.
4, 405 and the AND circuit 406 form three consecutive pixels. However, it is also effective to increase the number of pixels or to change the threshold value of the digital comparator circuit 403 in accordance with the system or applicable document. As a result, when the double-page spread original as shown in FIG. 84 is the size A3, the edge of the double-sided original is detected as a point 200 mm from the home position, and as shown in FIG. Is detected as a point 180 mm from the home position of the book original.

The book manuscript set based on the center binding portion is
The position of the leading edge of the image changes according to the size, the page position changes according to the double-page spread, and the page length changes according to the binding portion. The end detection result of the original in the sub-scanning direction is IPU103.
It is used for calculation of a page suction position for page turning by a microcomputer in the inside. In another example, at the time of reading a book original, the left end of a page of a double-page spread original is detected from the left side of the platen by a book original left end detection circuit similar to the book original right end detection circuit. The microcomputer in the IPU 103 uses the detection signal at the end of the original in the sub-scanning direction to determine the effective image area in the sub-scanning direction of the original, and for example, in copying, uses it as a register to determine the image position on the transfer paper. Further, an image outside the image effective range in the sub-scanning direction is automatically erased to prevent a useless black solid image. Also, when applied to a file system, etc.,
The microcomputer in the IPU 103 reduces the image data according to the detection signal of the end of the original document in the sub-scanning direction, thereby saving the memory amount.

Next, detection of the end of the original in the main scanning direction will be described. FIG. 86 shows a main document main scanning direction end detecting circuit. The detection of the end of the original in the main scanning direction is performed by the reading sensor 101.
Is performed based on the change in the read data of one line in the main scan. As shown in FIG. 87, the double-page spread original BO is aligned on the original platen 1 with the left end of the back support plate 14 based on the left end of the binding portion and on the front side as a reference. Then, the front cover of the book is fixed to a fixed plate arranged on the left platen 1 and the back cover of the book is fixed to the fixed plate arranged on the right platen 1 during continuous reading of the book. To prevent the top page from being displaced due to the shape displacement of the binding portion. The procedure for setting the original is as follows.

[0203] The left cover of the original is clamped by the fixed plate on the original plate on the left side with reference to the left end and the front side of the binding portion. The right cover of the right document is sandwiched between the fixing plates on the right document table. The reading start page of the book is opened, and the scanning unit 200 is closed thereon to flatten the upper spread page of the book.

In this system, the maximum size of a book document is A3 size in maximum spread and B5 size in minimum size. Further, the size of the book original is also a size other than the standard size of the A series and the B series, and in the book original, the contraction of the page by the curvature of the binding portion in the facing direction does not always have a constant aspect ratio. In this system, as shown in FIG. 87, the original is set on the platen 1 on the basis of the central near side.
The left edge, right edge, and upper edge of the page differ depending on the size of the two-page spread original. That is, the leading and trailing edge positions of the image in the sub-scanning direction and the trailing edge position in the main scanning direction change.

As shown in FIG. 87, at the time of page turning scanning after reading an image of a book document, the end of the book document is detected from the position of the outer frame portion of the black platen outside the maximum document size in the sub-scanning direction of the spread book document. Is started, and then the black platen is read, and edge detection is performed on the two-page spread original side. In this edge detection, read data in the sub-scanning direction of a specific pixel of the reading sensor 101 is continuously sampled, the data is compared with a threshold value, and a pixel whose read data is larger than the threshold value is repeated a plurality of times. The position is a page end position in the sub-scanning direction of the book document. The microcomputer in the IPU 103 calculates a page suction / elevation position for turning a page from the page end position in the sub-scanning direction, scans the scanning unit 200 to the position, and temporarily stops.

Next, the microcomputer in the IPU 103 detects the end in the main scanning direction at the position where the scanning unit 200 is temporarily stopped. The double-page spread original is set on the basis of the front side of the center, and the read data for one main scanning line is sampled at a position where the page suction / raising position, that is, the image reading position is on the double-page spread original in the sub-scanning direction. The data for one line starts from the position of the outer frame portion of the black platen on the back side of the maximum book document size, and then becomes a black platen and a two-page spread original. Edge detection in the main scanning direction is performed by comparing continuous data in the main scanning direction with a threshold value, and a position where a plurality of pixels whose read image data is larger than the threshold value is repeated by a plurality of pixels is determined in the main scanning direction of the original document. This is the page end position.

In the example shown in FIG. 87, reading is performed in the directions indicated by arrows in both the main scanning direction and the sub-scanning direction, and the end position of the book document is calculated from the data. For example, when the size of a two-page spread original is B4, the left and right ends of the original are approximately 182 mm from the center set position and approximately 257 from the front end.
mm. The scanning unit 200 starts scanning from the left home position at the start of reading scanning, and the read image data is stored in the frame memory 104 several mm before the end position of the book document. The microcomputer in the IPU 103 sets the end of the book document as the start position of the effective image area in the main scanning direction and the sub-scanning direction, and uses the frame memory 1
04 is instructed to output image data.

FIG. 91 shows the detection data of the upper end of the two-page spread original BO by the reading sensor 101. The upper end of the book document detected by the reading sensor 101 is located at a position approximately 270 mm from the near-side reference position in the main scanning direction when the spread book document size is B4 size. The reading sensor 101 starts detecting the front side from the platen outer frame position at the page suction / elevation position when the page turning scan is stopped after the image reading scan, first reads the black platen outer frame portion, and then reads the black platen outer frame portion. Scan the black platen. Reading sensor 10
Reference numeral 1 reads the inside of the right cover of the book original, then reads the background density, which is the margin of the topmost page, and generally reads the image after a margin of more than ten millimeters. The microcomputer in the IPU 103 compares the data continuous from the reading sensor 101 in the main scanning direction with a threshold to detect the start of the margin of the top page, and sets that position as the top of the page.

As shown in FIG. 86, since the original document is placed on the near side of the original platen 1 and one line of the main scanning of the reading sensor 101 is performed from the back side of the original platen 1, the reading is performed. Data in the main scanning direction from the sensor 101 is rearranged in reverse order by a FILO (first in / last out) circuit 407 for one line.

The data from the FILO circuit 407 is latched by the data latch circuit 408 by the clock CLOCK and sampled for each main scanning line, and the upper 4 bits are compared with the threshold value by the digital comparator circuit 409. This threshold is set by a microcomputer in the IPU 103. Data from the digital comparator circuit 408 is transmitted to the D flip-flop circuit 41.
The data from the digital comparator circuit 408 and the data from the D flip-flop circuits 410 and 411 are ANDed by the AND circuit 412, and the value of the data DATA from the reading sensor 101 is larger than the threshold value. A detection signal is generated when three pixels continue in the main scanning direction. The counter 413 is an OR circuit 414
The pixels in the main scanning direction are counted by counting the clock CLOCK input through the
When the detection signal from 12 is input to the OR circuit 414, the counter 413 is masked and stopped, and the value of the counter 413 is notified to the microcomputer in the IPU 103.

In the reading operation for detecting the end portion of the book original in the main scanning direction, the reading sensor 101 performs the reading operation on the black original platen 1 on the back side or the outer frame portion of the platen 1 in the forward direction. The occurrence of BO background is detected. Also,
In this main document main scanning direction edge detection, the microcomputer in the IPU 103 does not perform the scanning control of the scanning unit 200 and takes a long processing time.
The microcomputer in the IPU 103 performs the data latch circuit 408 and the D flip-flop circuits 410 and 411 when the end of the original in the main scanning direction is detected.
And the reset signal RESET to the counter 413 is released.

The microcomputer in the IPU 103 uses the detection signal at the end of the original in the main scanning direction to determine the effective image area in the main scanning direction of the original having a relatively irregular size. The outside image is automatically deleted to prevent useless black solid images. Further, when applied to a file system or the like, the amount of memory can be saved by reducing image data based on a detection signal at the end of the main document in the main scanning direction.

Next, the detection of the rear end of the original in the sub-scanning direction by the page storage sensor will be described. In detecting the end of the original document page after the first page turning, the end position of the uppermost page of the two-page spread original is accurately and stably calculated using the transparent page storage sensor 415 in the turning page transport path. In this apparatus, since the front cover of the original is fixed to the original platen 1, deviation during scanning of the original is small. Also, the book original tends to have a very small positional displacement due to page turning.

In this apparatus, a transparent page storage sensor 415 is used for page detection as shown in FIG. The transmissive page storage sensor 415 includes a light emitting diode 415a as a light emitting element above the upper page transport guide 416 and a photodiode 415b as a light receiving element below the lower page transport guide 417.
Is provided. Holes 416a, 417 are provided in the page transport guides 416, 417 constituting the page transport path 418.
is provided, and the light emitting diode 415a and the photodiode 415b are arranged obliquely with respect to the vertical direction of the detection position of the page transport unit. It has a structure in which it does not accumulate at the turning page detection position and falls downward.
The page storage sensor 415 detects the turning pages of the book original conveyed through the page conveyance guides 416 and 417 after separating one page, and the detection accuracy is extremely high, being within 1 mm without selecting the original. Further, a sensor for detecting a jam of a page that has not been stored or discharged when turning a page shares the page storage sensor 415.

The scanning unit 200 shown in FIG. 34 scans leftward after reading a two-page spread original BO, and turns over the pages of the original BO. The turning trajectory when turning over the pages of the book is almost constant and is mechanically determined. The uppermost right page end of the book BO is attracted to the turning belt 208, and the scanning of the scanning unit 200 is temporarily stopped, and the turning belt 208 is raised to guide the turning page in the direction of the page transport path. The scanning unit 200 is further scanned leftward, the turning pages are stored in the page transport path, and the leading end of the pages comes out of the scanning unit 200. The trajectory of the turning page is always substantially constant along the rising and turning belt 200 and is determined by its mechanical layout. Page storage sensor 4
Reference numeral 15 denotes a turning page, which is arranged near the entrance of a turning page storage unit formed by a page transport path and detects a turning page of a book document.

The page storage sensor 415 detects the page turning start detection timing to turn the page, that is, the scanning unit 200 at the turning page storage detecting position of the page turning section.
The position of the right end of the turning page when the turning page is on the book document is calculated from the position of. Therefore, after turning and separating one page of the book original, the end of the page is detected by the page storage sensor 415, so that the position of the page end in the turning start direction (the right side in the present apparatus) of the double-page spread original is accurate and accurate. The microcomputer in the IPU 103 detects the output signal (page storage start detection timing) of the page storage sensor 415 at the rear end of the image effective range of the book document and the next page turning position (the book document is one page). (Because the displacement of the position due to page turning is extremely small) is calculated and corrected.

The control of the page suction position (page turning position) based on the above calculation result is performed as follows. In this apparatus, the page suction width when the turning belt 208 comes into contact with and lifts the right end of the page of the book original is about 20 mm. If the turning-over page storing section detects that the turning-over of the original document is earlier than the target timing, the suction width is larger than the target of 20 mm, so that the microcomputer in the IPU 103 turns over the page at the end of the page in the direction of starting to turn the open original. The suction and ascending timing by the shift 208 is displaced in an earlier direction. For example, the microcomputer in the IPU 103 estimates that the suction width is 22 mm when the book original turning page storage detection timing of the turning page storage unit is 2 mm earlier by the distance, and scans the next page suction position by the turning belt 208 by 2 mm. The address is changed to the right with the address of the unit 200.

On the other hand, the microcomputer in the IPU 103 operates the turning belt 2 when the turning-over page storage detecting timing of the turning-over page storing section is later than the target timing.
08 is smaller than the target of 20 mm, so that the turning belt 208 at the end of the page in the turning start direction of the two-page spread original is used.
, The timing of suction and ascending is displaced in a slow direction.
As a result, the page attraction width is controlled to be constant, and the turning operation is performed stably without turning over, turning over many sheets, and preventing damage to the book original.

Next, detection of the leading end of the original in the sub-scanning direction by the page storage sensor will be described. When the scanning unit 200 is further scanned to the left after the turning-up page is stored in the turning-over page storing section, the turning-over page is restrained at the center binding section of the double-page spread original, and the turning page is pulled by the binding section. The sheet is ejected from the page turning path in a U-shaped path. The trajectory of the page turning is always substantially constant along the page feeding path and the pressing roller 281a. IPU1
The microcomputer in 03 detects the start timing of the turning-over of the original document in the turning-over page storage unit by the page storage sensor 415, that is, the position of the scanning unit 200 at the timing (position) of detecting the start of the turning-over of the original document in the turning-over page storage unit. Then, the right end position where the turning page should be placed on the upper left of the book document is calculated from the output signal of the page storage sensor 415. Therefore, by turning over one page of the book original and separating it, and detecting the end of the page, the position of the end of the page in the turning end direction (left side in the present apparatus) of the spread original is accurately and reliably detected. The microcomputer inside calculates the leading end of the image effective range of the book original from the page end position in the turning end direction of the two-page spread original and uses it for the next reading registration.

The microcomputer in the IPU 103 calculates the start position address A and the end position address B of the effective image range between the right end and the left end of the calculated book document.
Since the center position is the binding portion of the double-page spread of the book document, the center binding portion address C is calculated as follows. C = (A + B) / 2 Thereby, the reference position of the page distribution at the time of copying the two-page spread original document image is obtained. Also, since the image of the central binding portion of the two-page spread original tends to be shaded or distorted, the image at that position can be surely erased. Furthermore, I
The microcomputer in the PU 103 registers the right page at the time of page independent output using the calculated center binding portion address C.

As described above, the displacement of the uppermost spread page position due to the repetition of page turning of a two-page spread original is extremely small in one-page turning. Further, the positional deviation of the uppermost double-page position caused by repetition of turning over 10 pages is 1 mm or less, and the deviation of the image position (copy resist) is small.
Therefore, the microcomputer in the IPU 103 calculates the page suction position of the original document a plurality of times by repeating the page turning scan, for example, once for the turning operation of 10 pages, and updates the position data to thereby update the original document. The calculation process and time for the page edge are reduced.

Next, a description will be given of the input of the book original end (page turning position). As described above, in the first page turning, the right end portion of a two-page spread original is detected based on the read data in the image reading method. However, there are rare cases where the end of a page of a book original such as a gravure book is not detected or is erroneously detected. This is performed when the page is not inserted into the page feeding path during the page turning scan. The cause is a defective page turning position, specifically, the page suction width is too small, or the page runs off the suction belt 208. For example, the sheet cannot be lifted, and the sheet cannot be suctioned depending on the paper type of the book. In the former case, if the page suction width is set correctly, the page is reliably turned.

As shown in FIG. 89, the present apparatus is provided with a scale 419 for inputting a right-page edge on the outer side of the document table 1 on the right front side. The scale 419 is provided in parallel with the sub-scanning direction and is graduated at equal intervals. When the apparatus is stopped due to the first page turning, "" is displayed on the operation unit 99.
A guidance display of “Page MIG HASHINO SCALE SIZE” is displayed, the operator opens the scanner unit, reads the value of the right end of the page on the scale 419 at the right end of the page, and inputs the value from the numeric keypad of the operation unit 99. The example of FIG. Then, the user inputs the scale value “12” at the right end position of the top page, and then inputs confirmation by pressing the enter key of the operation unit 99. Then, by pressing the print key of the operation unit 99, I is input.
The microcomputer in the PU 103 starts reading and scanning in the same manner. This time, the page is sucked and raised by the turning belt 208 based on the input position information at the right end of the page . As a result, page turning is started with an appropriate suction width regardless of the type of the original document page image. After that, the second and subsequent page turning operations are controlled by the microcomputer in the IPU 103 at the timing calculated from the page right end detection position of the page storage sensor 415 in the same manner as described above.

Next, a page turning position input method will be described. In this example, the input of the book document end position is the scale 41
Although the numerical value of 9 was made to be input with a ten key, other 1st
In this example, a slide volume for adjusting the position of the end of the original document is provided at the same position as the scale 419 for inputting the end of the right page of the outer package portion on the right front side of the original table 1, and the resistance value or the converted voltage value is stored in the IPU 103. I read it with a microcomputer.

Further, in another second example, the scanning unit 2
A sensor is provided at 00 and a shielding plate detected by the sensor is provided at the same position as the scale 419 for inputting the right edge of the page on the outer right side of the document table 1 so as to be slidable in the horizontal direction. The shielding plate is adjusted to the position of the end of the original document, and is detected by the sensor when the scanning unit 200 scans, and the timing of the suction rise is set. In this case, the sensor may be slidable with the position of the sensor and the shielding plate reversed.

In another third example, the reading sensor 101
Is used. The reading sensor 101 reads from the near side in the main scanning direction. The optical system is arranged so that the projection position of the read pixel in the main scanning direction to the start position is applied to the outer side of the document table 1 on the near side. At the same position as the scale 419, a slidable white mark member having a clear contrast with the black color of the exterior part is arranged, and the mark at a fixed position in the main scanning direction is read by the reading sensor 101 during scanning reading. A mark is detected by a mark detection circuit similar to the original document end detection circuit of FIG. 85 from the data from the CPU, and the microcomputer in the IPU 103 calculates the timing of page attraction and rise based on the data from the mark detection circuit. Control the page suction position.

The book original main scanning direction end detecting circuit shown in FIG. 85 and the book original main scanning direction end detecting circuit shown in FIG.
The pixel data before image scaling processing in the main scanning direction is arranged in the UU 103 to detect an end portion in the sub-scanning direction and an end portion in the main scanning direction of the book document. Instructed by computer. The microcomputer in the IPU 103 manages the edge of the original document sub-scanning direction detected by the original document sub-scanning direction edge detection circuit based on the scanning position of the scanning unit 200.
The microcomputer in U103 refers to a counter that counts pixels in the main scanning direction, and manages the main document main scanning direction edge detected by the main document main scanning direction edge detection circuit. The microcomputer in the IPU 103 calculates the page suction position and the effective image range in the main scanning direction based on the book document sub-scanning direction end and book document main scanning direction end.

Next, the operation of the present system will be described. A. TPS operation mode (1) Reading mode (a) Original reading The sub first mirror 222 is released and the lower fluorescent lamp 201,
202 turns on, the carriage 200 is scanned rightward after shading correction is performed at the left home position, a two-page spread original is read at a time, and the image data is stored in the frame memory 104.

(B) Sheet document reading The sub first mirror 222 is inserted and the upper fluorescent lamp 203,
204 is turned on, and after shading correction is performed at the left home position, the carriage 200 is scanned rightward to read the sheet document, and the image data is stored in the frame memory 1.
04.

(2) Return Mode (a) Turning Page In the original reading mode, a high-voltage bias is applied to the high-voltage power supply 1.
16 is applied to the turning belt 208 by the carriage 2
00 is scanned in the left direction and the turning roller 208 stops when the turning roller 208 reaches the right end of the two-page spread, and the turning roller 2
08 increased to 0.5 sec. Later, the carriage 200 is scanned leftward. The microcomputer in the IPU 103 calculates the right end of the two-page spread original from the storage detection timing (position) of the page storage sensor 415 due to the pages sucked by the turning roller 208, and calculates the page discharge detection timing (position) by the page storage sensor 415. Calculates the left edge of a two-page spread original, calculates the start and end positions of the read image of the book in the sub-scanning direction from both of them, and calculates the central binding part and the length of the two-page spread original. I do.

(B) Carriage return In the sheet original reading mode, the carriage 200 is scanned leftward. (3) Homing Mode When the power is turned on, the carriage 200 is scanned and set at the center home position.

(4) Pre-scanning mode The carriage 200 is scanned to the left home position to prepare for shading correction and start reading. (5) Post-scanning mode After the return operation of the carriage 200, the carriage 200
Is scanned to be set at the center home position, and after the document table 1 has been raised, it is lowered by a certain amount and retracted from the carriage 200.

B. Printer operation mode (1) Duplex mode ○ Simplex copy (default) (a) Original duplex Both sides of the original are copied on both sides of the transfer paper to form a duplex copy.

High-speed double-sided Only in the 1-to-1 double-sided mode, the output page order is changed using the frame memory 104, the right page is formed on the first transfer paper surface, and the first transfer paper passes through the double-sided conveyance path. And the right page is formed on the surface of the second transfer paper, the second transfer paper is transported through the double-sided transport path, and the first transfer paper is re-fed. Then, the left page is formed on the back surface, and the first transfer paper is discharged.

(B) Facing Both Sides Facing pages of the original are copied on both sides of the transfer paper. -Not implemented because access to each page of the high-speed double-sided frame memory 104 is required. (C) Automatic both sides The copy start pages on the left and right sides of the original are copied on the transfer paper surface.
Therefore, when the copy start is designated from the right page by the operation unit 99, (a) the original double-sided, and when the copy start is designated from the left page by the operation unit 99, (b) the double-sided spread.

(2) Erasure Mode (a) Elimination of Binding Part (Default: Available) An image having a designated width is erased based on the center of a two-page spread original. (B) Outer frame erase (default: automatic) An image of a designated width is erased based on the transfer paper.

(3) Copy format mode (a) Independent page (default) Facing pages of the book are copied separately for each page. (B) Facing pages Facing pages of the original are copied as they are.

(4) Start Page Input (a) Left In the independent page mode, copying is started from the left page of the document. (B) Right In the independent page mode, copying starts from the right page of the document.

(5) Image reference input Center (default) Copies are made at the center of the transfer paper on the basis of the transfer paper. (A) Left edge of page Copies are made to the set amount from the left side of the transfer paper based on the transfer paper.

(B) Right end of page Copies are made from the right side of the transfer paper to the set amount on the basis of the transfer paper. (6) Discharge Input (a) Reverse Discharge The transfer paper is reversed and discharged. Other than double-sided copy is set automatically.

(7) Page number input (a) Start page + end page Copying of the difference from the copy start page to the end page is repeated. (B) Total number of pages Copies are repeated by the total number of pages from the designated double-page spread.

(8) Reading input ○ Sheet document (default) Reading the sheet document is selected in the upper side reading. (A) Book Original Lower side reading selects book original reading and automatic page turning.

(9) Erasure width input (a) Binding part erasure width (default: 10 mm) An erasure width is set in units of 1 mm from 2 mm to 40 mm. (B) Erasure width of outer frame (default: 10 mm each) The erasure width is set in units of 1 mm from 0 mm to 30 mm.

(10) Input of image reference position (a) Left edge of page (default: 0 mm) From 0 mm to 20 mm, the position from the left of the transfer paper is set in 1 mm units. (B) Right end of page (default: 0 mm) A position from the left of the transfer paper is set in units of 1 mm from 0 mm to 20 mm.

Next, the basic operation of the TPS will be described in detail. (1) Book Reading Mode (a) The book reading mode is designated by pressing the BOOK key of the operation unit 99. (B) When the print key of the operation unit 99 is pressed, the document table 1 is raised, and the book document is applied to the carriage 200 and fixed.

(C) The sub first mirror 222 is released,
The lower fluorescent lamps 201 and 202 are turned on. (D) After the carriage 200 is scanned leftward and reaches the left home position, shading correction and AGC are performed. (E) The carriage 200 is scanned rightward to read the image of the two-page spread original, and the image-processed data is stored in the frame memory 104.

(F) After the carriage 200 has been scanned to the far right, charging of the turning belt 208 is started.
The carriage 200 is scanned leftward. (G) The carriage 200 is scanned leftward to read the image of the original, and the microcomputer in the IPU 103 detects the right end of the original from the density difference between the original platen 1 and the original page based on the image data from the VPU 102. . (H) The microcomputer in the IPU 103 stops the carriage 200 once the turning belt 208 reaches the position of the right end of the document detected, raises the turning belt 200, and then moves the carriage 200 leftward after a predetermined time. Scan.

(I) The microcomputer in the IPU 103 calculates the range of the main document in the main scanning direction based on the upper end of the page of the main document detected by the main document main scanning direction edge detection circuit when the carriage 200 is temporarily stopped, and The automatic erase position in the direction is calculated.
02 is turned off. (J) The microcomputer in the IPU 103 scans the carriage 200 to the left after a certain period of time from the page suction rise of the turning belt 200. (K) The page stored in the page feed path is detected by the page storage sensor 415, and the microcomputer in the IPU 103 accurately calculates the right end position of the page from the page storage start detection timing (position), and Detects turning over.

(L) At the point where the carriage 200 has reached the center position, the upper and lower sides of the left and right original tables 1 and the right and left sides of the right original table 1 are temporarily released, and the spread of the book is determined. (M) When the turning belt 208 reaches the central position of the original, the charging of the turning belt 208 stops. (N) The carriage 200 is scanned in the left direction, and the discharge of the pages stored in the turning page transport path is detected by the page storage sensor 415. The microcomputer in the IPU 103 detects the page discharge start detection timing (position) at the left end of the page. The position of the set is accurately calculated, and the center position of the double-page spread and the length of the double-page spread are calculated from the calculated left and right end positions of the page.

(O) After the microcomputer in the IPU 103 completes the calculation, the image effective range of the original document is obtained from the left and right end portions of the page, the image output form, and the erase position, and the address of the frame memory 104 is set to the image effective range. The image data is designated corresponding to the range, the image data in the image effective range is read out by a synchronization signal from the printer, and transferred to the printer.

(P) After the carriage 200 reaches the left home position, the lower fluorescent lamps 201 and 202 are turned on.
Shading correction and AGC are performed.

(Q) The carriage 200 is scanned in the right direction, an image of a two-page spread original is read, and the image-processed data is stored in the frame memory 104. (R) The right side of the original is read and the lower fluorescent light 20 is read.
Immediately after data is turned off in the frame memory 104, the microcomputer in the IPU 103 obtains the image effective range of the original from the detected positions of the left and right edges of the page, the image output mode, and the erase position. The address of the frame memory 104 is designated in accordance with the effective image range, and the image data in the effective image range is read out by a synchronization signal from the printer and transferred to the printer.

(S) Hereinafter, during continuous operation, (f),
(H), page turning from (j) to (n), and reading from (p) to (r) are repeated. In the second and subsequent times, (g), (i) edge image detection, and (o) printout after page turning is not performed. (T) After the carriage 200 reaches the left home position, the carriage 200 scans rightward and stops at the center home position.

(2) Sheet document reading mode (a) The sheet reading mode is designated by pressing the BOOK key.

(B) When the print key is pressed, the original table 1 is lowered, and the original table 1 is retracted from the carriage. (C) The sub first mirror 222 is inserted, and the upper fluorescent light 2
03 and 204 light up. (D) After the carriage 200 is scanned leftward and reaches the left home position, the upper fluorescent lamps 203 and 204 are turned on, and shading correction and AGC are performed.

(E) The carriage 200 is scanned rightward to read a sheet document, and the image-processed data is stored in the frame memory 104. (F) After the carriage 200 is scanned to a position determined by the transfer paper size and the magnification, the upper fluorescent lamps 203 and 204 are turned off, and the carriage 200 is scanned leftward.
(G) Immediately after the data storage in the frame memory 104 is completed, data is read out from the designated address of the frame memory 104 by a synchronization signal from the printer and transferred.

(H) Thereafter, during continuous operation, reading and returning from (d) to (g) and writing and reading in the frame memory 104 are repeated. (I) The end of the continuous operation is that after the carriage 200 of (d) reaches the left home position, the carriage 200 is scanned rightward and stopped at the center home position.

As described above, in the present system, the turning pages stored in the page storing section are detected by the page storing sensor 415, and the start of storing the turned pages into the page storing section by the page storing sensor 415 is detected. Since the computer detects the page end of the book original in the page turning start direction, the page end of the book original in the page turning start direction can be accurately and reliably detected. Also, the page storage sensor 415
Since the end of the page of the book original in the page turning end direction is detected by the detection of page turning, the microcomputer within the IPU 103 mechanically estimates the position of the double-page spread on the book original from the form of page discharge and sets the page. The end of the page in the turning end direction can be accurately and reliably detected.

Also, since the microcomputer in the IPU 103 calculates the end position of the read image of the original document by detecting the turning-over page of the page storing sensor 415, the trailing end of the effective range of the read image can be known. Erase outside the effective range, use the trailing end position of the image effective range as a reference for transfer paper alignment, use the trailing end position of the image effective range for automatic selection of transfer paper size, store image data in a file etc. In that case, the capacity can be minimized.

Further, since the microcomputer in the IPU 103 calculates the start position of the read image of the original document by detecting the turning-over page discharge of the page storage sensor 415, the leading end of the read image effective range can be determined. The outside of the range can be erased, and the rear end position of the image effective range can be used as a reference for the alignment of the transfer paper. Further, since the center binding portion position of the book document is calculated from the end position and the start position of the read image of the book document,
A reference position for page sorting can be obtained when copying a two-page spread original image read at a time. In addition, shadows and distortions that are likely to occur in the central binding portion image of the two-page spread original can be reliably eliminated.

The turning-over page detecting means for detecting the turning-over page stored in the page storing section and the means for detecting whether or not the turning-over page can be stored in the page storing section are provided by the same page storing sensor 415.
Can be combined, so that the cost can be reduced. In addition, since the page storage sensor 415, which is an optical sensor for detecting the turning pages of the original document conveyed by the page transport unit, is arranged obliquely with respect to the vertical direction of the turning page detection position of the page transport unit, Paper dust generated by page storage accumulates above the page storage sensor 415 from the hole at the page detection position and the light of the page storage sensor 415 is blocked, so that the page storage sensor 415 cannot detect the page. Can be prevented.

Further, the original is scanned from outside of the size area in the sub-scanning direction by the scanning turning means to start reading the image of the original, and the reading data of the specific pixels of the scanning turning means in the sub-scanning direction is continuously sampled. The threshold value is compared with the threshold value, and the position where the pixel whose read data is larger than the threshold value is repeated a predetermined number of times is detected, and this position is set as the page end position in the sub-scanning direction of the book original. Erroneous detection due to noise caused by the read data processing system can be prevented.

[0263]

As described above, according to the first aspect of the present invention, the original document placed in the spread state is moved in one direction on the original surface.
To separate the topmost manuscript page,
The separated document page is stored in the page
Book manuscript having page turning means for turning pages of book manuscript
In the handling device, the end of the separated original page is detected.
Turning page detecting means and detection of the turning page detecting means
Based on the signal, the page turning direction of the next page turning
Since the calculation means for calculating the start side end position is provided, the start side end position in the page turning direction of the book document can be accurately and reliably detected.

[0264] According to the invention described in claim 2, the pages are spread and mounted.
By moving in one direction on the original surface of the placed original
The uppermost original page, and separates the separated original page.
Is stored in the page storage section and ejected, so that the page
In a book manuscript handling apparatus having a page turning means for turning
To detect the end of the separated original page.
Based on the detection signal of the turning page detecting means.
The end of the page turning direction of the original page where the page turning has been performed.
Calculating means for calculating the side edge position, the position of the turning page on the double-page spread original is mechanically guessed from the form of page discharge, and the end side edge position of the original page turning direction is accurately and accurately determined. It can be detected reliably.

According to the third aspect of the present invention, the spread and loading
By moving in one direction on the original surface of the placed original
The uppermost original page, and separates the separated original page.
Is stored in the page storage section and ejected, so that the page
Page turning means for turning, and this page turning means
Reading for reading the original surface of the book original on which page turning has been performed
And a document handling apparatus having
Page detecting means for detecting the end of the original page, and
Based on the detection signal of the page turning means, the page turning hand
Manuscript in the book manuscript turned over by columns
Start position, end position and center binding part of the scanned image on the surface
Calculating means for calculating at least one of the positions , so that the rear end of the read image effective range can be known, so that, for example, the outside of the image effective range can be erased during copying, The end position can be used as a reference for the transfer paper alignment, the rear end position of the image effective range can be used for automatic selection of the transfer paper size, or the capacity can be minimized when storing image data in a file or the like. It becomes possible.

According to the invention described in claim 4, according to claim 1 or
4. The document handling apparatus according to claim 2, wherein
Since the page detection means is provided in the page storage section,
The same effect as that of the book manuscript handling apparatus according to claim 1 or 2 or 3.
Fruit is obtained.

According to the invention set forth in claim 5, according to claim 1 or
In the original manuscript handling apparatus according to 2 or 3 or 4,
The calculation operation by the calculation means is performed by the page turning means.
Since it is performed after several page turning operations, calculation processing and time are reduced.
Can be reduced.

According to the invention of claim 6, claim 1 or claim 2
Means the original manuscript handling device described in 2 or 3 or 4 or 5
Then, the first page turning by the page turning means is performed.
Before scanning, read the vicinity of the end of the book document in the turning direction.
Edge reading means, and the reading of the edge reading means.
The first page by the page turning means based on the
Start end position of the page to be turned in the page turning direction
First page by means of page turning means
Set the end of the original page where the page is to be turned
The first page turning operation can be performed.

[0269]

[0270]

[Brief description of the drawings]

FIG. 1 is a block diagram showing an image reading unit in an example of a system to which the present invention is applied.

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

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

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

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

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

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

FIG. 8 is a diagram illustrating the exposure light amount of the fluorescent lamp of the scanning unit when the light amount is increased asymmetrically in the bookbinding portion of the TPS in the same TPS.

FIG. 9 is a diagram illustrating the exposure light amount of the fluorescent lamp of the scanning unit when the light amount is gradually changed asymmetrically in the bookbinding portion of the book in the same TPS.

FIG. 10 is a circuit diagram showing a read image data amplifier circuit in the TPS.

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

FIG. 12 is a diagram showing a transition of a left end portion of a book original displaced by page turning of a scanning unit in the same TPS when the bookbinding section is moved.

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

FIG. 14 is a waveform diagram showing read data of an end of a book original by the scanning unit.

FIG. 15 is a partially enlarged side view of the end of the book original.

FIG. 16 is a timing chart showing the timing of the original document mode operation at the time of the first scanning in the two-page spread output / 1 to 1 copy mode in the TPS.

FIG. 17 is a timing chart showing the timing of a book original mode operation at the time of continuous scanning in a two-page spread output / 1 to 1 copy mode in the TPS.

FIG. 18 is a timing chart showing the timing of the original document mode operation in the independent page output / 1 to 1 copy mode in the TPS.

FIG. 19 is a timing chart showing the timing of the original document mode operation in the independent page output / two-sheet copy mode in the TPS.

FIG. 20 is a timing chart showing the timing of a book original duplex mode operation in the TPS.

FIG. 21 is a timing chart showing the timing of a book original mode operation in the 1to1 high-speed duplex mode in the TPS.

FIG. 22 is a block diagram showing a circuit configuration of the system.

FIG. 23 is a side view schematically showing a document table unit in the TPS.

FIG. 24 is a plan view schematically showing a book mounting table in the TPS.

FIG. 25 is a perspective view schematically showing a size stopper that positions the left and right document tables in the document table unit according to the size of a book document.

FIG. 26 is a plan view schematically showing the size stopper.

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

FIG. 28 is a side view schematically showing the unit opening / closing lock mechanism.

FIG. 29 is a perspective view showing a platen pressure fixing switching device in the platen unit.

FIG. 30 is a cross-sectional view schematically showing the platen pressure fixing switching device.

FIG. 31 is a perspective view showing one component of the platen pressure fixing switching device.

FIG. 32 is a perspective view schematically showing a drive unit of the platen pressure fixing switching device.

FIG. 33 is a plan view schematically showing the platen pressure fixing switching device.

FIG. 34 is a schematic sectional view showing the overall configuration of the apparatus main body in the TPS.

FIG. 35 is a side view schematically showing a state where the original table is retracted downward in the TPS.

FIG. 36 is a timing chart showing timing at the time of a retracting operation of the original table under the TPS.

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

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

FIG. 39 is a diagram illustrating a transition of the scanning unit at the book original center point in the pressing / fixing operation mode of the original plate.

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

FIG. 41 is a diagram showing a transition 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 a timing chart showing operation timings of the scanner motor and the right and left platen elevating motors in the pressing and fixing operation mode of the platen.

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

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

FIG. 45 is an explanatory diagram of driving of pins of a detection input unit in the slider.

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

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

FIG. 48 is a schematic side view showing a positional relationship between the pins and racks and the left and right document tables in the slider.

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 a positional relationship between a two-stage pinion gear and a 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 a mounting position of a horizontal slide plate to a slide side plate in the slider.

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

FIG. 56 is a side view schematically showing 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 gear, the slide output gear, and the output pin when the spine 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 gear, the slide output gear, and the output pin when the spine of the book document set on the document table is inclined.

FIG. 59 is a schematic side view showing a configuration of an operation transmission mechanism between a detection input unit and an output unit of the slider.

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

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

FIG. 62 is a sectional view schematically showing a scanning unit in the scanner unit.

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

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

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

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

FIG. 67 is a side view schematically showing a switching mirror driving unit and an optical path adjusting unit for switching the optical path of the scanning optical system in the scanning unit from the original scanning side to the sheet original scanning side.

FIG. 68 is a cross-sectional view schematically showing 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 original scanning side to the sheet original scanning side.

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

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

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

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

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

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

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

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

FIG. 77 is a diagram illustrating the timing of charging the image reading unit and the turning belt at the position where the right page image reading is completed by 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 a relationship between a scanning rail of a support mechanism of the scanning unit with respect to the scanner unit and a pressing roller;

FIG. 80 is a schematic perspective view for explaining a positional relationship between a turning belt and a page feed roller in the scanning unit.

FIG. 81 is a schematic side view showing a contact state of a page feed roller with a turning belt of the scanning unit.

FIG. 82 is a schematic side view showing a state where the page feed roller is retracted from the flip belt by a toggle joint device that drives the page feed roller in conjunction with the operation of the flip belt in the scanning unit.

FIG. 83 is a schematic side view showing a state where the page feed roller is brought into contact with the turning belt by the toggle joint device.

FIG. 84 is a diagram showing read data of a reading sensor for a book original in the TPS.

FIG. 85 is a block diagram showing an end image detection circuit of the TPS in the original scanning direction in the book original.

FIG. 86 is a block diagram showing an end image detection circuit of the TPS in the main document main scanning direction.

FIG. 87 is a plan view showing an example of a book original set of the TPS.

FIG. 88 is a side view showing a book document page storage detection section of the TPS.

FIG. 89 is a plan view showing a part of the book original set state of the TPS.

FIG. 90 is a diagram showing read data of the read sensor for a book original.

FIG. 91 is a view showing read data of a book original by the read sensor.

[Explanation of symbols]

Reference Signs List 101 reading sensor 102 VPU 103 IPU 104 frame memory 200 scanning unit 208 turning belt 401, 413 counter 402, 408 data latch circuit 403, 409 digital comparator 404, 405, 410, 411 D flip-flop 406, 412 AND circuit 407 FILO circuit 414 OR circuit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-51136 (JP, A) JP-A-2-153671 (JP, A) JP-A-60-195854 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) G03G 15/00 107 G03G 15/04 B42D 9/04 H04N 1/10 G03B 27/58-27/64

Claims (6)

(57) [Claims] An original is placed on a document surface of a book placed and opened.
Separates the topmost manuscript page by moving in the direction
Then, the separated original page is stored in the page storage section and discharged.
Means for turning pages of the book original by
In the original document handling apparatus,
Turning page detecting means for detecting the end portion, and the turning page detection
The next page turn based on the detection signal of the means
Calculating means for calculating the starting end position in the hollow direction
A book manuscript handling device, characterized in that: 2. The method according to claim 1, further comprising the step of :
Separates the topmost manuscript page by moving in the direction
Then, the separated original page is stored in the page storage section and discharged.
Means for turning pages of the book original by
In the original document handling apparatus,
Turning page detecting means for detecting the end portion, and the turning page detection
Based on the detection signal of the means,
Calculating means for calculating the end side end position in the page turning direction
A book manuscript handling device comprising: 3. An original document placed on a spread original is placed on the original surface.
Separates the topmost manuscript page by moving in the direction
Then, the separated original page is stored in the page storage section and discharged.
Page turning means for turning a page of the book manuscript,
The original which is turned over by the page turning means.
Book manuscript handling device having reading means for reading a manuscript surface of a manuscript
To detect the end of the separated original page.
The turning page detecting means and the detection signal of the turning page detecting means
Page turning is performed by the page turning means on the basis of
Starting position of the read image on the original surface of the book original
Position, end position and center binding position
Book handling, characterized by comprising a calculating means for outputting
apparatus. 4. A book manuscript handling apparatus according to claim 1, 2 or 3.
Wherein the turning-page detecting means is provided in the page storing section.
A book document handling apparatus, wherein 5. The book manuscript according to claim 1, 2 or 3 or 4
In the handling device, the calculating operation by the calculating means is
This is performed after multiple page turning operations by the page turning means.
A book manuscript handling device characterized by the following. 6. The method according to claim 1, 2 or 3 or 4 or 5.
In this original document handling device, the first page turning means
Before turning the page, the turning direction of the book
End reading means for reading the vicinity of the start side end;
The page turning is performed based on the read data of the edge reading means.
Page turning in which the first page turning is performed
Motohara characterized by determining the start end position in the direction
Document handling device.