JPH0798524A - Book document double-sided image forming device and method therefor and book document image forming method - Google Patents

Abstract

PURPOSE:To form the image of a book document in a desired form on paper by forming the image on front and back surfaces of the book document on both sides of the paper and forming the image of two pages of the widely opened book document on both sides of the paper. CONSTITUTION:An IPU 103 generates an effective image area signal in a reading-subscanning direction for the document image from the spot of the end of the left page of the widely opened book document and calculates a page sucking position at the time of turning a page when a carriage 200 reaches the end of the right page of the widely opened book document. Then, reading-scanning by the carriage 200 and page turning-scanning which is returning motion are started and a laser printer starts forming the image after deciding an image effective range by a page storing position at the first time. At the second time and thereafter, the laser printer starts forming the image immediately after finishing reading-scanning in the image effective range. The end of the page of the widely opened book document is detected by a page storing sensor at the time of turning the page, and the copying of the pages of the widely opened book document is performed while tuning the pages. In a book document double-sided mode, copying is performed so as to constitute both sides of transfer paper the same as both sides of the page of the book document.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-sided original image forming apparatus, a two-sided original image forming method, and a two-sided original image forming method.

[0002]

2. Description of the Related Art This original manuscript reading device is a device for turning a page of the original manuscript by a page-turning device and reading the original manuscript. Image is formed on the paper. As the page turning device of this document reading device,
This is to turn pages by sucking and separating the pages of the original document that are opened and placed facing down, and the pages of the original document that are opened and placed facing upward are moved by suction and separated. To turn pages by doing
It is known that the pages of the original document, which are opened and placed facing upward, are turned by rollers, arms and the like.

However, the page turning apparatus has a problem that the page turning is not reliable due to the influence of the weight of the book original and the original surface is rubbed. In addition, since the page turning device moves in the upper space of the book document, it is difficult to avoid becoming a large-sized device. Therefore, the present inventor has proposed a document reading device having a page turning device that solves the above-mentioned problems and turns the main document with high reliability without increasing the size of the device. Here, the original document is a document in which a plurality of pages are bound so that they can be opened. The document reading device turns a page of the main document by scanning the main document by storing the page of the main document in the page storage unit by the page turning device and discharging the page.

[0004]

Generally, the original document is a double-sided printed matter and has a large number of pages, and when copying the original document, double-sided copying is frequently performed according to the copy amount. Further, a desired number of pages are copied from a desired odd numbered page or even numbered page of the original document. For this reason, it is possible to selectively use the double-sided copy function of copying the images on both facing pages of the original document on the front and back sides of the paper and the double-sided copying function of copying one front and back images of the original document on the front and back sides of the paper. Is required.

However, in the image forming apparatus using the above-mentioned document reading device, a double-sided copying function for copying the images of both facing pages of the main document on the front and back sides of the sheet, and one image of the front and back sides of the original document for the front and back sides of the sheet. There is no one having a double-sided copying function for copying to, and these functions cannot be selectively used, and the original document image cannot be formed on a sheet in a desired copy form.

As a result, the images on the front and the back of the copy do not match the images on the front and the back of one original of the main document, which makes it unsuitable for binding or binding the copies, especially continuous gravure and the like. The images on both pages of the double-page spread may be separated. Depending on the copy start page and the number of copied pages of the original document, copying of the original document may start from the back side of the first sheet and end on the front side of the sheet. In this case, the number of copied pages of the sheet increases by one. Copy time becomes longer.

When the images of both double-page spreads of the original document are copied onto one side of the paper, the left page is copied extra when the copy start page of the double-page original document is the right page. When the image on the left page of the final copy of the original document is copied onto the front surface of the final sheet, the image on the right page next to the left page of the final copy of the original document is additionally copied onto the back surface of the final sheet.

The present invention provides a double-sided original image forming apparatus, a double-sided original image forming method, and a double-sided original image forming method capable of forming the original image on a sheet in a desired form by improving the above-mentioned drawbacks. The purpose is to do.

[0009]

In order to achieve the above object, the invention according to claim 1 is a book document image forming apparatus for turning a page of a book document to read the book document to form a read image on a sheet. A first double-sided image forming means for forming one front and back image of the original on both sides of the paper, and a second double-sided image forming means for forming an image of two-page spread of this original on the front and back of the paper. It is a thing.

According to a second aspect of the present invention, in a main document image forming method for turning pages of the main document to read the main document to form a read image on a sheet, the image of the two-page spread original document is read to store the read image information. After forming the image information of the right page of the double-page spread original document from the storage means on the front surface of the sheet, the pages of the original document are turned over, the front and back sides of the sheet are inverted and re-fed, and the double-page spread original document is stored. Image is read and the read image information is stored in the storage means, and the image information of the left page of the double-page spread original document from the storage means is formed on the back surface of the sheet.

According to a third aspect of the present invention, in a main document image forming method for turning a page of the main document to read the main document to form a read image on a sheet, the image of the two-page spread original document is read to store read image information. After the image information of the left page of the spread book document from this storage means is formed on the surface of the paper, the pages of the book document are turned over, the front and back of the paper are reversed, and the paper is re-fed. The image information of the right page of the two-page spread original document is formed on the back surface of the sheet.

According to a fourth aspect of the present invention, in the original document image forming method of turning over the pages of the original document to read the original document to form a read image on a sheet, the image forming start page of the two-page spread original document is designated as the image forming start page. When the image forming start page designating means is a spread right page, one front and back image of this document is formed on the front and back of the sheet, and the designation of the image forming start page designating means is a spread left page. In the case of, the two-page spread image of this document is formed on the front and back sides of the sheet.

According to a fifth aspect of the present invention, in the double-sided original image forming method according to the fourth aspect, the image arrangement mode on both sides of the sheet is automatically selected by designating the image formation start page of the double-page spread original.

According to a sixth aspect of the present invention, in a main document image forming apparatus for turning pages of the main document to read the main document to form a read image on a sheet, the two-page spread images of the main document are formed on the front and back sides of the sheet. It is provided with a warning display means for occasionally displaying a warning.

According to a seventh aspect of the present invention, in a main document image forming apparatus for turning pages of the main document to read the main document to form a read image on a sheet, start image formation for designating a page for starting image formation of a two-page spread original document. Page designation means and first of paper
In a double-sided image forming mode in which an image is formed from the front side, a warning display unit is provided to display a warning when the spread left page of the original is designated by the image formation start page designating unit.

According to an eighth aspect of the present invention, in a main document image forming method of turning a page of the main document to read the main document to form a read image on a sheet, the image of the two-page spread of the main document is read to read image information. Is stored in the storage means, and after the image information of the two-page spread from the storage means is formed on the front surface of the sheet, the front and back sides of the sheet are reversed and re-fed to turn the pages of the original document, The image of the two-page spread is read and the read image information is stored in the storage unit, and the image information of the two-page spread is formed on the back surface of the sheet.

According to a ninth aspect of the present invention, in a main document image forming apparatus for turning a page of the main document and reading the main document to form a read image on a sheet, both sides of which the image of the main document is read and formed on the front and back sides of the sheet. Image forming means, page designating means for designating an image forming page of the original document, and blanking means for rendering the front surface of the first sheet and the back surface of the final sheet as blank images.

According to a tenth aspect of the present invention, after the image of the double-page spread of the original document is read and the image information of the right page of the double-page spread original is formed on the front surface of the sheet, the pages of the original document are turned over to turn the front and back sides of the sheet. And then re-feeding the sheet, reading the image of the double-page spread of the original document, and forming the image information of the left page of the double-page spread original document on the back side of the sheet, and the image formation start page of the double-page spread original document. The image forming start page designating unit for designating the image forming start page and the blanking unit for forming a blank sheet image on the front surface of the first sheet when the image forming start page designating unit designates the spread left page.

According to an eleventh aspect of the present invention, after the image of the double-page spread of the original document is read and the image information of the right page of the double-page spread original is formed on the surface of the paper, the pages of the original document are turned over and the front and back sides of the paper are reversed. And then re-feeding the sheet, reading the image of the double-page spread of the original document, and forming the image information of the left page of the double-page spread original document on the back side of the sheet, and the image formation start page of the double-page spread original document. And an image formation start page designating means for designating the image formation start page designating means, when the designation of the image formation start page designating means is a spread left page and the number of image formation pages of the original is an even number, and / or the image formation start page designating means. It is provided with a blanking unit that makes the back side of the final sheet a blank image when the designation is a right-page spread and the number of image forming pages of the original document is an odd number.

According to a twelfth aspect of the present invention, in a method for forming an image of a two-page spread original by turning the pages of the two-page spread original to read the book document and form a read image on a sheet, a left page of the two-page spread book original is read. Image information is formed on the front side of the sheet, the front and back sides of this sheet are reversed and re-fed, and the image information on the right page of the double-page spread original is formed on the back side of the sheet. Is designated by the image forming start page designating means, and when the designation of the image forming start page designating means is a spread right page, the front surface of the first sheet is made a blank image.

According to a thirteenth aspect of the present invention, in the double-sided image forming method for a book original according to the tenth or twelfth aspect, a rear surface discharging means for reversing and discharging the sheet is provided, and the image of the spread book original is read to read the page image information. Is formed on the front surface of the paper, the paper is inverted and re-fed, the page image information is formed on the back surface of the paper, and the paper on which the image of the first page is formed only on the front surface is discharged with the front surface facing up. To do.

According to a fourteenth aspect of the present invention, in a main document image forming method of forming a read image on a sheet by scanning the main document while turning pages of the main document, the image of the two-page spread original is read and the left side of the two-page spread document is read. Form the image information of the page on the front side of the paper, reverse the front and back of this paper and re-feed it, form the image information of the right page of the double-page spread original on the back side of the paper, and start the image formation of the double-page spread original The page is designated by the image forming start page designating means, the number of image forming pages of the original is designated by the image forming page number designating means, and the designation of the image forming start page designating means is the spread left page and the image forming page. When the number designation means is an odd number and / or when the image formation start page designation means is a spread right page and the image formation page number designation means is an even number, the back side of the final sheet is a blank image. To do.

According to a fifteenth aspect of the present invention, in a main document image forming method of forming a read image on a sheet by scanning the main document while turning pages of the main document, a two-page spread of the main document is performed by reading an image of the two-page spread original. The image information of the page is formed on the front side of the sheet, the front and back sides of the sheet are reversed and re-fed, the image information of the double-page spread original is read, and the image information of the double-page spread of the main document is formed on the back side of the sheet. Then, when the number of image forming screens is an odd number, the back surface of the final sheet is made a blank image.

According to a sixteenth aspect of the present invention, in a method of forming an image of a book original by reading the book original while turning pages of the book original to form a read image on a sheet, a two-page spread 2 of the book original is read by reading an image of the book spread original. The image information of the page is formed on the front side of the sheet, the front and back sides of the sheet are reversed and re-fed, the image information of the double-page spread original is read, and the image information of the double-page spread of the main document is formed on the back side of the sheet. If the image forming start page and the number of image forming pages of this document are specified, the number of image forming pages is divided by 4, and the remainder is 0 or 3, and the image forming start page is the left page, and / Alternatively, when the number of image forming pages is divided by 4 and the remainder is 1 or 2, and the image forming start page is the right page, the back side of the final sheet is made a blank image.

The invention described in claim 17 is,
In the double-sided image forming method of the original document described in 4, 15, or 16, reverse-face discharging means for inverting and discharging the sheet is provided, and the image of the double-page spread original document is read to form page image information on the front surface of the sheet. The sheet is reversed and re-fed, the page image information is formed on the back side of this sheet, and the sheet on which the image of the final page is formed only on the front side is discharged with the back side facing up.

According to an eighteenth aspect of the present invention, in a method for forming an image of a book original by turning the pages of the book original and reading the book original to form a read image on a sheet, a two-page spread of the book original is read by reading an image of the book spread original. Image information is formed on a sheet, and the first sheet and / or the half surface of the final sheet is made a blank image.

According to a nineteenth aspect of the present invention, in a method of forming an image of a book original by turning the pages of the book original and reading the book original to form a read image on a sheet, a two-page spread of the book original is read by reading an image of the book spread original. Image information is formed on a sheet, the image formation start page of this document is designated, and when this designation is a spread right page, the left side of the first sheet is made a blank image.

According to a twentieth aspect of the present invention, in a method of forming an image of a main document by turning over the pages of the main document and reading the main document to form a read image on a sheet, a two-page spread of the main document is read by reading the image of the double-page spread original. Image information on a sheet, specify the number of image forming pages and the image forming start page of this document,
When the designation of the image forming start page is the spread left page and the number of image forming pages is odd, and / or the designation of the image forming start page is the spread right page and the number of image forming pages is the even number, the final paper The right side is a blank image.

[0029]

According to the first aspect of the invention, the first double-sided image forming means forms one front and back images of the original document on the front and back sides of the sheet, and the second double-sided image forming means forms the two-page spread of the original document. Image on the front and back of the paper.

According to the sixth aspect of the invention, in the main document image forming apparatus for turning the pages of the main document to read the main document to form a read image on a sheet, the two-page spread images of the main document are formed on the front and back sides of the sheet. Occasionally, the warning display means displays a warning.

According to the seventh aspect of the present invention, in the main document image forming apparatus for turning the pages of the main document to read the main document and form a read image on a sheet, the image formation start page of the spread main document is designated as the image formation start page. By means of the first of the paper
In the double-sided image forming mode in which an image is formed from the surface, when the spread left page of the original is designated by the image forming start page designating means, the warning display means displays a warning.

According to the ninth aspect of the invention, the double-sided image forming means reads the image of the main document and forms it on the front and back sides of the sheet, and the image forming page of the main document is designated by the page designating means. The blanking unit sets the front surface of the first sheet and the back surface of the final sheet as blank images.

In the tenth aspect of the present invention, the double-sided image forming means reads the image of the double-page spread of the main document and forms the image information of the right page of the double-page spread original on the surface of the sheet, and then the page of the main document is changed. The front and back sides of the sheet are turned over and re-fed, the image of the double-page spread of the main document is read, and the image information of the left page of the double-page spread original is formed on the back side of the sheet. The image formation start page of the two-page spread original is designated by the image formation start page designating unit, and the blanking unit renders the front surface of the first sheet a blank image when the designation of the image formation start page designating unit is the spread left page.

In the invention of claim 11, the double-sided image forming means reads the image of the double-page spread of the main document and forms the image information of the right page of the double-page spread original on the front surface of the sheet, and then the page of the main document is changed. The front and back sides of the sheet are turned over and re-fed, the image of the double-page spread of the main document is read, and the image information of the left page of the double-page spread original is formed on the back side of the sheet. When the image formation start page of the spread book document is designated by the image formation start page designating unit, and the designation of the image formation start page designating unit is the spread left page, and / or the number of image formation pages of the document is even, and / or When the designation of the image formation start page designating means is a spread right page and the number of image forming pages of the original is an odd number, the blanking means renders the back side of the final sheet a blank image.

[0035]

FIG. 15 shows an example of a system to which the present invention is applied. This system includes a scanner unit 50 for reading a document.
0, and a printer 501 that forms an image, and the scanner unit 500 has a reading carriage (scanning unit) 200 that scans and scans a document. The scanning unit 200 includes an image reading plate (SBC) 101 having a CCD (charge coupled device) for reading an original image.
And a VPU (Video) for performing processing from analog image signal from the image reading plate 101 to A / D conversion.
Processing Unit) 102, fluorescent lamp and its inverter power supply, heater, thermistor, fan,
It has a signal line of a load system such as a solenoid and a portion 502 for relaying wiring of a power supply line. This part 502 and VPU
102 are independent flexible cables for each IPU
It is connected to 103.

IPU (Image Processni)
g Unit (image processing device) 103 is equipped with a frame 104 for storing a read image signal, which is attachable / detachable by a connector, and a microcomputer in the IPU 103 includes a stepping motor for scanning the scanning unit 200 and a DC for driving a document table. A load such as a motor is controlled via the motor drive circuit 503, and a signal from the sensor is fetched. The printer 501 has a main control board 107 including a main control unit for controlling a copy mode, fetching a key signal from the operation panel 99, and a display control, and a sequence control unit for performing a copy timing control. The control unit and the microcomputers of the operation panel 99 mutually transmit and receive commands by serial communication. The main control board 107 controls inputs of sensors related to image formation of the printer 501, a motor, a solenoid, a clutch, and the like to perform sequence control of image formation.

FIG. 1 shows the data processing blocks of this system. This system is a book and sheet document reading device (hereinafter, referred to as TPS: Turn the Page Sc).
anner. And an electrophotographic laser printer that outputs the document read image. This system can also be configured with the image reading function of the original document and the page turning function independent of each other, but here, this system is a device in which both the page turning function and the image reading function are incorporated in one unit. ing.

This system is roughly divided into an image reading unit and an image data processing unit of the TPS, and an image forming unit including a laser printer. The image reading unit arranged at the right end of the scanning unit of the TPS includes a reading sensor 101 including a reading plate having a CCD, and a VPU 102.
Supplies a drive signal to the CCD based on the reference signal from the IPU 103, performs correction from the analog output signal from the reading sensor 101 to digital signal conversion, and obtains read image data of 8 bits for each dot.

Then, the VPU 102 sets each dot 8
Approximately 7.5 MHz by synchronizing the bit read image data with the clock and the gate signal in the main scanning direction and the sub scanning direction.
It is output to the IPU 103 at a speed of z, 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 γ correction in the final processing, converts it into video data of 4 bits for each dot suitable for writing, and stores the processed data in the frame memory 104.

In this TPS, the reading speed of the original document is 9
0 mm / sec. , Scanning speed of sheet original 12
0 mm / sec. , Image forming speed 180 mm / sec. Since there is a difference between the reading scanning speed and the image forming speed, the frame memory 104 for one page of A3 size is used for the speed buffer. Further, the frame memory 104 is effective for document protection during repeat copy because the TPS comes into contact with the original document to scan and read it, and the image data is repeatedly read out a plurality of times during the repeat copy. is there. Furthermore, when the TPS independently prints the left and right pages of the original document, the images of the left and right pages can be divided using the frame memory 104 by one scanning reading, and the TPS constitutes an image forming unit. There is no need for synchronous scanning with the image writing of the laser printer 501, or for rerunning.

Further, depending on the speed correspondence of the IPU 103, the frame memory 104 having a 4-bit dot structure is used for the IPU 1
Since the write data after the image processing by the IPU 103 is stored in the frame memory 104, the capacity of the frame memory 104 is halved for the read image data of 8 bits for each dot.

The capacity of the frame memory 104 is 400 DP
The image data of I is 128 Mbits for one page of A3 size, and is composed of a DRAM. Frame memory 1
The image data input from the IPU 103 to 04 is performed for two dots of the image data in parallel, and about 3.8 MH
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 similarly output in parallel, and the IPU 10 is output at a speed of about 7.5 MHz.
3 and the gate signals in the main scanning direction and the sub scanning direction, which are sent from the control unit 3, are sequentially output to the main control board 107.

The main control board 107 is a frame memory 1
The image data output at high speed from 04 in accordance with the image forming speed of the laser printer is converted into serial data of about 15 MHz, and a FIFO (First In First O
ut) The speed is further increased in the main scanning direction with the memory, about 18 MH
Synchronize with the write clock of z. The 4-bit image data for each dot is pulse-width modulated by the modulator to become light emission time data, and the laser (LD) controller is PWM-controlled.
It is transmitted as data 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 caused to emit light, and the photoreceptor is exposed and scanned to form an image. In an electrophotographic laser printer, a photoconductor is uniformly charged by a charger, and then an electrostatic latent image is formed by exposure scanning with an LD 105. The electrostatic latent image is developed by a developing device and transferred onto a transfer sheet by a transfer device. Transcribe.

The IPU 103 also controls scanning of the TPS reading carriage 200, and the reading carriage 20.
The scanner motor 106, which is a stepping motor for scanning 0, is driven. The scanner motor 106 scans the reading carriage 200 at a scanning speed of 90 mm / sec. The scanning is performed at a constant speed, and when the magnification is changed, including the zoom from 71% to 141%, the reading carriage 200 is scanned at a linear speed of 1.41 to 0.71 times that.

Further, the scanner motor 106 is 120 mm / sec. When returning the reading carriage 200 to the scanning start position and when turning the page of the original document. The reading carriage 200 is scanned at the speed of. Main control board 1
Reference numeral 07 controls the image forming sequence 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
U 103 is an S for transferring the read image data to another system device such as a printer or a workstation.
Main control board 10 with CSI interface 98
7 receives a signal from the operation panel 99 and outputs a signal to the operation panel 99.

Next, the image reading signal processing in this system will be described. Read sensor 10 with CCD
1 is capable of reading about 5000 pixels and 400 DPI, and simultaneously reads the reflected light image of one line of the original in the main scanning direction and converts it into an electric signal. The electric signal from the reading sensor 101 is corrected by the VPU 102 such as a waveform correction such as a clamp.
Amplification and A / D conversion are performed and output to the IPU 103 as an 8-bit digital signal. Reading sensor 101
Is EVEN, OD for high-speed transfer of analog image data
It is divided into two systems of D and output to the VPU 102, and the VPU 10
In 2, a switching IC composed of an analog switch is used for EVEN, OD from the reading sensor 101.
The image data of D is synthesized into a serial analog signal and transferred. In this case, the image data transfer rate of one pixel is about 7.5 MHz in the original reading mode, and in synchronism with this, the combined image data is converted into an 8-bit 256-gradation digital signal by the A / D converter. Convert to. On the other hand, in the variable amplifier, in order to correct the fluctuation of the light quantity of the fluorescent lamp, the amplification degree is adjusted to an appropriate value according to the read data of the reference white plate.

FIG. 2 shows data processing of the reading scanner unit in the TPS. The analog image data continuous from the reading sensor 101 in the main scanning direction is V
In the PU 102, the base level of the waveform is adjusted by the clamp, and the sample is held in synchronization with the pixel clock. Next, the VPU 102 reads the image data and changes the amplification factor of the data according to the exposure light amount and the data level thereof, and an AGC (Auto Gain Cont).
processing is performed, analog image data is converted into 8-bit digital image data by an A / D converter, and read image data that is linear with respect to the document 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 handle gradation efficiently in accordance with the visibility. This logarithmic conversion is performed by an input / output 8-bit / dot LUT (LOOK
UP TABLE).

The 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 the image processing of the digital image signal from the VPU 102, and controls the high image quality processing, and the main ones will be described below. 1. Shading correction The TPS of the present system uses a linear light source of a fluorescent lamp, and the light amount is maximized at the center of the CCD due to the condensing of the lens, and the light amount is reduced at the end of the CCD. Also,
CCDs have variations in the sensitivity of each element. Therefore, the IPU 103 performs both shading corrections on the digital image signal using the reference white plate read data for each pixel.

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

3. Main scanning direction variable magnification In this system, the image reading and writing resolutions are the same 400 DPI, but the reading pixel frequency of the frame memory 104 is about 15 MHz and the writing pixel frequency is about 18 MHz, which are different.
Reference numeral 03 performs frequency conversion of image data, and performs 50% to 200% scaling processing in the main scanning and sub-scanning directions on the image data. The IPU 103 calculates the scaling value by calculating the peripheral pixel data.

4. The γ-correction electrophotographic laser printer has a non-linear density reproduction characteristic (printer γ characteristic), and the original density cannot be faithfully reproduced even if the image data from the scanner is used as it is. Therefore, the IPU 103 uses the conversion table to convert the image data into a writing exposure light amount that matches the printing characteristics of the laser printer. Further, the IPU 103 also realizes the density adjustment by changing the conversion value during the manual density adjustment. In addition, the IPU 103 also performs image conversion such as masking, trimming, mirroring, black and white inversion, detection of document size, position and density, and image detection such as marker detection.

The image data sent from the IPU 103 is converted into light energy by the LD 105. The optical writing type laser printer 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. The former method is used in this system. As a result, high image quality with resolution and gradation can be obtained.

Next, the TPS main document exposure method will be described. This system uses two as a light source for exposing the original document.
Two fluorescent lamps 201, 202 and two fluorescent lamps 203, 204 as light sources for exposing a sheet document are provided.
Two fluorescent lamps 201 and 20 as light sources for exposing this document
As shown in FIG. 27, the reference numerals 2 are arranged on both upper ends of the platen glass 205 arranged at the main document reading slit position in the direction orthogonal to the scanning direction of the scanning unit (carriage) 200.

These fluorescent lamps 201 and 202 expose the main document BO from the left and right sides through the platen glass 205 to eliminate the uneven density on the left and right pages and the shadow of the main document binding portion BOa when the main document BO is read. There is. On the other hand, two fluorescent lamps 20 as light sources for exposing a sheet document
As shown in FIG. 27, reference numerals 3, 204 denote scanning units 20.
The fluorescent lamps 203 and 204 are respectively arranged at the sheet document reading slit positions in the direction orthogonal to the scanning direction above 0, and the fluorescent lamps 203 and 204 pass through the contact glass 206 on the upper surface of the present system and the scale 207 is placed on the contact glass 206. Sheet document S set according to
O is exposed from both the left and right sides to eliminate density unevenness and shadows when the sheet document SO is read, like the document BO.

Next, a method of correcting density unevenness by using the read image data amplification circuit of TPS will be described.
FIG. 3 shows the read image data amplification circuit. This read image data amplifier circuit includes an operational amplifier 301, a capacitor C1, resistors R1 to R9, and transistors Q1 to Q1.
It is a non-inverting amplifier circuit composed of Q5, and VPU1
Reference numeral 02 designates an analog image signal from the CCD 101, which is subjected to waveform correction such as clamp, sample hold, EVEN / ODD pixel combination, etc., and then amplified by a read image data amplifying circuit, A / D converted and IPU as digital data.
Transfer to 103.

The read image data amplifier circuit amplifies the input analog image signal VIN by the operational amplifier 301 and outputs it as the output signal VOUT. The 5-bit input signals G1 to G5 for setting the data amplification value are supplied to the transistor Q1.
The resistors R3 to R7 are selectively connected by turning on / off the transistors Q1 to Q5 in addition to the base of Q5 to Q5, and the gain of the read image data amplifier circuit is normally the proper gain calculated by the AGC process in the VPU 102. Is set to.

The amplification factor of the read image data amplifier circuit is determined by the resistance value R composed of the resistor R1 and the parallel resistors R2 to R7, and is represented by VOUT = VIN (1 + R / R1). Therefore, in this read image data amplifying circuit, it is possible to select a magnification in 32 steps from approximately 6 times to 450 times depending on the set 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, the same correction is performed by data shifting or multiplication of the A / D converted digital image data. May be.

By the way, the curvature and the shadow of the binding portion of the original are
Generally, it has a characteristic that it occurs at the same position in the main scanning direction. Therefore, in order to improve the density unevenness due to the original binding 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 by the minimum density value which is the background portion of the original document. In this correction, the amplification factor of the read image data amplification circuit shown in FIG. 3 is determined by the peak value of the image data of the previous line in the main scanning direction. Or FIF
The image data for one line is delayed and sampled by the O memory, the peak of the lowest density value which is the background portion of the main document of the image data in the main scanning direction is calculated, and the shift of the digital image data is performed based on that value. Alternatively, multiplication is performed so that the background density near the binding portion becomes equal to the background density at the page portion. Here, in general, since the background density in the page of the original is constant, the image density correction amount of the page is small, and the side effect due to using the minimum density value of the background of the original as a reference value is extremely small. .

In general, the left page portion of a two-page spread original document such as a publication is increased by the page turning operation, and the left end portion of the original document moves upward and rightward with respect to the cover position of the original document. On the other hand, the right page portion of the original document is reduced by the page turning operation, and the right end portion of the original document moves downward and rightward. FIGS. 4 to 6 show examples of such a transition of the left end portion of the document with respect to the number of pages to be repeated. Figure 4
6A to 6C, the position of the left end of the book spread placed on the initial end of the book is set to "0", and the amount of movement of the left end of the book to the right, which is increased by the page turning operation, is represented by a displacement amount. ing. Further, the displacement amount of the left end portion of the original document in the right direction is set as a plus value and displayed in millimeter units.

FIG. 4 shows the thickness of this document is 20 mm and the total number of pages is 75.
In the case of 0 pages, the thickness of this document is 12 mm and the total number of pages is 30 in FIG.
In the case of 0 pages, the thickness of this document is 9 mm and the total number of pages is 180, as shown in FIG.
The case of pages is shown, and the sizes of these originals are all spread B4 size. As is clear from FIGS. 4 to 6,
The left end portion of the original document is displaced to the right by the page turning, but the shape of the central binding portion is changed by this displacement, and the displacement amount of the left end portion of the original document does not necessarily increase monotonically. Further, since the central binding portion of the original document slides in the left-right direction due to the page turning, as shown in FIGS. 5 and 6, there is a point where the displacement amount decreases conversely in the page turning process, which is shown in FIG. In the case of a thin manuscript, it is also displaced to the left (minus direction). Furthermore, these displacements are
It also depends on the size and thickness of the original document and the quality of the paper. When the cover of this document is fixed on the pressure platen as in this system, abrupt displacement due to the flap of the spine of this document can be suppressed, but the top page position of the two-page spread document changes due to page turning. To do. This causes a deviation between the reading position and the page turning position.

Therefore, in the present system, the vertical displacement of the original manuscript releases the regulation of the pressure original table every time the scanning unit 200 scans and presses against the scanning unit 200 with a spring property so that the original manuscript becomes the maximum. Automatically correct the upper page so that it is on a uniform plane. Furthermore, in order to obtain an effective image range (page surface of a book that has been opened) suitable for image capture and printing, regardless of the displacement of the edge of the document,
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 effective image range of the book document is obtained with the end position of the book document as a reference. When the spread size is A3, the edge portion (cover edge portion) of this document detected by this system is about 210 mm from the center setting position at the reading position and about 30 m from the home position of the scanning unit 200.
It is the position of m.

The detection of the end portion of the original document in this system is performed by changing the read information in the sub-scanning direction by the specific pixel of the read sensor. The read data of the reading sensor is as shown in FIG. 7 at the edge portion of the document. Here, at the left end of the original document, the surface of the read original document is located below the image forming point of the read sensor, so the focus is deviated and the image is slightly blurred. Further, when the reading position has not reached the original, the original table or the back cover portion is read, and the level becomes the same as that of the black image.

When the reading position of the reading sensor reaches the end of the original document, a striped pattern portion due to the edge group of each page of the original document is detected. In general, most of the manuscripts have a white background, and there are no characters or images in the part of ten or more millimeters from the end of the manuscript. Therefore, when this uniform color (white) continues, it is determined to be the end of the original document. The edge of the original document is detected at the end of the page-turning scanning in the direction opposite to the image reading direction.

As described above, by detecting the document surface based on the output information of the reading sensor, an effective image range suitable for image capturing and printing can be obtained regardless of the displacement of the edge of the document. Generally, the document end portion of the two-page spread original document BO is constructed by stacking the edge groups of the document pages in a slanted shape as shown in FIG. A shade is generated, and the striped pattern due to the edge group of each page of this document is emphasized and read.

In the present system, the left and right pages are evenly read when reading the original document, and the pair of fluorescent lamps 20 are arranged from the left and right sides of the original document in order to read the curved portion of the binding portion of the original document.
Exposure illumination is performed at 1,202. Then, at the time of detecting the edge of the original, one of the fluorescent lamps is turned off or dimmed to emphasize the striped pattern due to the edge group of the original page at the edge of the original, thereby improving the accuracy of detecting the position of the edge of the original. That is, IPU1
In the latter half of the right-to-left page-turning scanning of the scanning unit 200, the microcomputer within
Turn on only 2. The microcomputer in the IPU 103 detects the right page edge of the double-page spread original for sucking the right page for turning the page, and turns off only the fluorescent lamp 202 on the right side to read when the scanning of the original surface is completed. .

By the way, in the method of detecting the end portion of the original document by the edge group of the original document as described above, when there is an image similar to a striped pattern by the edge group of the page in the read page of the original document, There is a possibility that the edge of the document will be detected incorrectly.
Therefore, when detecting the edge of the original document, the original document is compared by comparing the image of the illumination light from both sides of the pair of fluorescent lamps 201 and 202 with the image of the illumination light from one side of only one fluorescent lamp. It is possible to improve the detection accuracy of the end portion.

In this system, the microcomputer in the IPU 103 turns off or dims one of the fluorescent lamps at the time of detecting the end portion of the main document, and emphasizes and reads the striped pattern by the edge group of the page at the end portion of the main document. Switching between the first mode and the second mode in which exposure is performed by both fluorescent lamps 201 and 202 to emphasize and read the striped pattern due to the edge group of the page at the end of the original is switched between the first mode and the second mode. The image read data in the above mode is compared with the image read data, and the read data when there is a difference between the two image read data is set as the detection data of the end portion of the document.

Further, 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 image read data is small, the read data is formed on a plane. It is determined that the read data is the read data of the image that is printed, and it is recognized that the read data is the image of the image to be printed in the original document page.
Further, this method may be carried out for confirmation only when the detection result of the end portion of the original document is doubtful. As described above, according to this method, it is possible to further improve the accuracy of detecting the position of the end portion of the original document.

9 to 14 show the copy operation timing in the main document mode of the present system. FIG. 9 shows an operation panel 99
FIG. 10 to FIG. 14 show the case where the edge of the original document is detected by the image in the initial mode after the print key is pressed. Shows the case of implementation. 10 to 14
In this case, the first original document reading operation and the image edge detection operation are the same as those in FIG.

In FIG. 9 to FIG. 14, the numerals indicate the read page numbers of the original document, and pages 2 and 3 and pages 4 and 5 form the spread pages of the original document. Further, the reference symbols RP and L of the read signal memory R of the frame memory 104.
P represents a right page (RP) and a left page (LP) of the read image data, respectively. Further, the page size of the main document in each mode is A4 size, two spread pages of the main document are continuously read by one scanning of the scanning unit 200, and the read image data is stored in the frame memory 104 for A3 size. It is stored as read data, and image data is read from the frame memory 104 according to each output mode, imaged by a laser printer, and recorded on a transfer sheet.

FIGS. 9 and 10 show the case of the 1 to 1 copy mode in which the image of the main document in the spread state is output on A3 size transfer paper and one copy is made on the main document.
Shows the case of the 1 to 1 copy mode in which the images on the left and right pages of the original document are separately output for each independent page on the A4 size transfer paper, and one copy is made on the original document. FIG. 12 shows a case of a two-sheet copy mode in which an image of an independent page is output as in the case of FIG. 11, two copies are set, and two copies are made on the original document.

When the print key for instructing the start of copying on the operation panel 99 is turned on at the operation timing of the original mode in FIG. 9, the microcomputer in the IPU 103 reverses the scanner motor 106 for scanning the scanning unit 200. 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 of the left home position, the microcomputer in the IPU 103 drives the scanner motor 106 in the normal rotation direction to turn on both fluorescent lamps 201 and 202 to perform the reading operation of the original document. Let it start.

The microcomputer in the IPU 103 generates the effective image area signal SFGATE in the reading sub-scanning direction with respect to the original image from the left page end point of the two-page spread original. Further, the microcomputer in the IPU 103 operates the data write signal memory W of the frame memory 104 by the effective image area signal SFGATE to control the data write range.

The microcomputer in the IPU 103 starts the detection of the right page edge of the original document when the casing 200 reaches the right page edge of the two-page spread original document, and calculates the page suction position when turning the page. When the scanning scan of the cache 200 is completed, the cache 200 enters the backward page-turning scan, and the first time the page storage position is detected and the image effective range is determined by the page storage position, then the laser printer starts image formation. To do. Further, after the second time, the laser printer starts image formation immediately after the end of scanning in the image effective range calculated by the previously detected page storage position. IPU
The microcomputer in 103 operates the data read signal memory R of the frame memory 104 by the effective image area signal PFGATE in the sub-scanning direction on the laser printer side and outputs the image data in synchronization with the laser printer. Further, when the page is turned, the page storage sensor repeatedly detects the page edge of the two-page spread original. By repeating the above steps, the double-page spread of the original document is performed while automatically turning the pages of the original document.

FIG. 11 shows the case of the 1TO1 copy mode in which an image is output for each independent page of this document. In this case, in the reading mode, the operation is performed at the same timing as in the case of FIG. 10, and when turning the pages, the data read signal memory R of the frame memory 104 is operated by two PFGATEs in accordance with the transfer paper continuously conveyed by the printer. Is
Image data for each page of the original document is output. When the address counter of the frame memory 104 is masked by PFGATE and stopped, the data of the image on the right page linked to the first image on the left page of the original document becomes the second PFGAT.
The E signal is read with a transfer paper interval in the laser printer.

FIG. 12 shows the case of a mode in which two independent pages of this document are copied as in the case of FIG. In this case, in the reading mode, the operation is performed at the same timing as in the case of FIG. 10, and at the time of page turning, the data read signal memory R of the frame memory 104 is adjusted by a plurality of PFGATEs in accordance with the transfer paper continuously conveyed by the laser printer. The image data for each page of this original is output for a plurality of pages. In this example, first, two images of the read left page are output, and then two images of the read right page are continuously output. While the laser printer is outputting a plurality of images, the TPS finishes the page turning scanning, and the carriage 200
Stops at the reading scan start position and stands by for the next reading scan.

FIG. 13 and FIG. 14 show the operation timing of the original document double-sided mode. In this two-sided original document mode, both sides of the transfer paper are copied in the same configuration as the front and back sides of the page of the original document. FIG. 13 shows a case where copying is performed in the order of read pages. This is because the 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 the transfer paper by the laser printer, and the transfer paper is reversed and conveyed to the double-side stack position via the double-sided conveyance path. To be done. On the other hand, TPS
Performs page turning once by scanning in the left direction, reads the next double-page spread of the original document, and stores the image data in the frame memory 104. The transfer paper that has been conveyed through the double-sided conveyance path in the laser printer is re-fed, the image data of the left page of the two-page spread original document is read from the frame memory 104, is formed on the back surface of the transfer paper, and the transfer paper is ejected. To be done. In the case of FIG. 13, there is a time until reversal for double-sided formation of the transfer paper and re-feeding by the transfer path, and 1TO1
The productivity of double-sided copying is low.

FIG. 14 shows the case of the 1TO1 high-speed double-sided copy mode in which the original document is copied using the frame memory 104 in a different reading page order. In this case, firstly,
The image on the right side of the two-page spread of the original document is formed on the surface of the first transfer paper, and the first transfer paper is conveyed by the double-sided conveyance path. Secondly, the next spread pages 2 and 3 of the original document are read and the image data thereof is stored in the frame memory 104. Third, the image data of page 3 is the frame memory 1
04, and imaged on the surface of the second transfer paper.
The second transfer paper is conveyed by the double-sided conveyance path.

Fourth, the first transfer paper at the double-sided stack position is re-fed and the image data of two pages is transferred to the frame memory 10.
4 is read out from the recording medium 4 and is formed on the back surface of the first transfer sheet, and the first transfer sheet is ejected. Thereafter, the image of the original document is output in the reverse order of the read spread pages, so that double-sided copying of the original document is performed at high speed. That is, in FIG. 9 and FIG. 10, the double-sided conveyance path conveyance period of the transfer paper is the same as the time until reversal for double-sided image formation of the transfer paper and re-feeding by the conveyance path. An image is formed on the next transfer paper during the road conveyance period, and a copy productivity about 1.5 to 2 times that of the conventional one can be obtained.

In the present system, in the double-sided copy mode, when a large number of copies with two or more copies are made, images are formed in the page order of the original document as shown in FIG.
An image is formed on the front surface of the transfer paper of the designated number of times, and the transfer paper is once stored at the double-sided stack position and then re-fed to form the back side image of the designated number of sheets and discharged. This system performs a stable page-turning operation against suction and separation of pages of the original document due to displacement of the suction roller. This is because the suction position is important because only the leading edge of the page is sucked and displaced upward and guided to the page storage section.

As described above, the page storage sensor detects the page edge of the document during the page-turning scanning of the document, and the suction and separation operation positions with respect to the page edge of the document that change due to repeated page-turning are determined. To be done. That is, the page end portion on the scanning end side is detected from the page storage position data to determine the ascending position of the suction roller at the time of page turning scanning, and the same amount of pages is always sucked and separated. As described above, since the present system detects the effective image range of the original document and the end portion of the original document by the page storage sensor, the image reading position (registration) and a stable page turning operation can be performed without using an independent detection unit. It can be realized continuously from the beginning to the end of the manuscript.

In this system, as shown in FIG. 27, in the scanning unit 200, there is a turning belt 208 for turning pages of the original document BO by electrostatic attraction. By forming a charge pattern on the upper side by a high voltage power source, the turning belt 20
8 is electrostatically adsorbed on.

When the original pages electrostatically attracted onto the turning belt 208 are turned over, the turning belt upper and lower solenoids swing the turning belt 208 upward so that the end portion of the page attracted to the turning belt 208 is scanned by the scanning unit. 200
Done by lifting to the side. 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 this page turning, the page turning scanning is re-executed.

The mirror switching solenoid is a solenoid for switching between the lower reading optical path for this original and the general upper reading optical path for sheet originals. A keep solenoid is used, and the solenoid is energized only when the optical path is switched. It The original image is displayed on the mirror 220 by the illumination of each fluorescent lamp.
An image is formed on the CCD of the reading sensor 101 connected to the VPU 102 through the lens 221 and the lens 216.
The VPU 102 generates a clock for driving the CCD,
The analog image signal output from the CCD is converted into a digital value by the A / D converter, and the frame memory 104
And output to the printer unit 501 including the above laser printer through the IPU 103. Here, the frame memory 104 is used as a buffer for the reading linear velocity of the TPS and the process linear velocity of the printer unit 112. Also, IPU1
In 03, image data processing is performed.

The configuration of the document table unit in the TPS will be described below. As shown in FIGS. 16 to 18, the document table 1 is formed of a resin plate having a thickness of 2 mm, and a material having a high friction coefficient such as an extremely thin rubber is attached to the upper surface of the plate. is there. The high friction coefficient material may be formed on the upper surface of the document table 1 by laminating, coating, spraying, or the like. In the document table 1 in this example, the document placing surface (upper surface) is formed to have an A4 size, and 1 is provided on each of the left and right sides of the apparatus main body center 2.
They are arranged one by one. A slide plate 3 is fixed under each document table 1. Each slide plate 3
Is made of sheet metal whose front and rear sides and outer side surfaces are bent downward, and adjusting studs 4 are fixed near the device body center 2 on the front and rear side surfaces, respectively. Each adjusting stud 4 has a hole at the end for fitting a slider pin described later.

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

The link plate 1 is provided for the angle 8 and the angle 7b.
0 is rotatably supported, and the link arm 11 is rotatably supported by the angle 9 and the angle 7a. With respect to the angles 7a, 7a, 9 the link plate 10 and the link arm 11 can be slid smoothly in the left and right directions, respectively. Furthermore, when viewed from the front of the document table unit, there are two arm plates 10 and two link arms 1 in the front and rear.
Numeral 1 is rotatably supported by studs 12 at X-shaped intersections.

With the stud 12 as the center of torsion, the torsion spring 13 causes the link plate 10 and the link arm 11 to rotate.
It is hung between and, by this torsion spring 13,
In FIG. 16, a force that constantly pushes the upper and lower pedestal 5 upward is working. The ascending / descending of the upper / lower table 5 due to this ascending force is performed by the scanning unit 200 whose vertical movement is restricted as described later.
Then, the document surface of the original document set on the document table unit comes into contact with the original document and is regulated. As a result, the pressure applied to the scanner unit 30 is maintained substantially constant regardless of the difference in the thickness of the original document.

Further, the ends of the two upper and lower pedestals 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 back cover of the original document 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, the upper and lower pedestals 5 are provided with hooks 15, and the hooks 15 and the angles 16 of the link plate 10 are connected by the tension springs 17, so that the pair of left and right upper and lower pedestals 5 are pulled apart from each other. ing. As a result, tension is constantly applied to the spine support plate 14 and the spine cover of this 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 each side plate 18 has a fixing pin 19 on which an opening / closing lock claw 32 of a scanner unit 30 described later is hooked.
Is attached. A leaf spring 21 for pushing the scanner unit 30 upward when the scanner unit 30 is closed and an open / close lock sensor 20 for detecting the closed state of the scanner unit 30 are attached to one side plate 18. There is.

The size stopper 27 adjusts the distance between the left and right manuscript tables 1 according to the thickness of the original document to be placed, and fixes the slide plate 3 (manuscript table 1) and the upper and lower tables 5 relatively to each other. This is for allowing the document table 1 and the upper and lower table 5 to move integrally with each other. 18 and 19 show schematic configuration diagrams thereof. As shown in FIG. 17, a pair of angles 22 are attached to the lower side of the upper and lower pedestal 5 at predetermined intervals.
As shown in FIG. 18, a rod 23 is horizontally mounted and fixed to these angles 22. A sliding body 24 is mounted on the rod 23 so that it can slide smoothly in the longitudinal direction of the rod 23 through its through hole. A short shaft 26 is planted in the sliding body 24 so as to be orthogonal to the rod 23, and a stopper 25 is rotatably supported on the short shaft 26. Here, stopper 2
The locking hole 25a formed at one end of the cable 5 is loosely fitted to the rod 23, and the other end of the cable 5 is extended so that it can be gripped by a finger.

The slide body 24 is fixed to an arbitrary position of the rod 23 by the stopper 25 inclining with respect to the rod 23 and the rod 23 and the locking hole 25a of the stopper 25 meshing with each other. That is, in the sliding body 24, the stopper 25 is normally tilted by the locking spring 28,
The rod 23 and the stopper 25 are integrally fixed to the rod 23, but in FIG. 19, the operator rotates the extended end portion 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 25a of the stopper 25 is disengaged, and the rod 23 and the stopper 25 can move along the rod 23. The sliding body 24 is fixed to the slide plate 3 (not shown). Therefore, as described above, by fixing the slide body 24 to the predetermined position of the rod 23, the slide plate 3 (original table 1) and the upper and lower table 5 are opposed to each other via the slide body 24 and the rod 23. It can be fixed at any position.

20 and 21 show the schematic construction of the open / close lock mechanism of the document table unit. As shown in FIGS. 20 and 21, the TPS has a configuration in which the scanner unit 30 is placed on the document table unit 35. Both units 30 and 35 are connected to each other by a hinge 36 arranged on the rear side of the TPS, and have a shell-type opening / closing structure in which the front side of the TPS is opened. The open / close lock mechanism of the document table unit in the TPS is arranged in front of both units 30, 35. As described above, the side plate 18 is provided with the fixing pin 19.

As shown in FIG. 20, a shaft 31 is rotatably supported on the scanner unit 30 side across the left and right side plates, and open / close lock claws 32 fixed to both ends of the shaft 31 are provided on the shaft. It rotates according to the rotation of 31. An opening / closing lever 33 is fixed near the center of the shaft 31, and by rotating the opening / closing lever 33, the opening / closing lever 33 is opened / closed with respect to the fixing pin 19 on the document table unit 35 side via the shaft 31. The lock claw 32 is adapted to be disengaged.

A spring 34 is hooked on the opening / closing lever 33, and the spring 34 urges the opening / closing lever 33 in a direction in which the opening / closing lock claw 32 is engaged (locked) with the fixed pin 19. As a result, in the state where the scanner unit 30 is closed as shown in FIG. 20, the open / close lock claw 32 engages with the fixed pin 19 and is locked with respect 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 from the fixing pin 19 on the document table unit 35 side.
21 is detached, and as shown in FIG. 21, the scanner unit 3
0 opens 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 document platen pressure fixing switching device and the document platen retracting device of this system will be described. The original platen 1, which is configured to be movable in the vertical direction by the link plate 10 and the link arm 11, is urged by a torsion spring 13 so as to constantly move upward. As a result, the scanner unit 30 can be
In the closed state, due to the rising behavior of the document table 1, the document surface of the main document BO which is opened and placed on the document table 1 is constantly pressed upward so as to be pressed against the lower portion of the scanner unit 30. There is.

The pressing force on the original surface of the original document BO is normally received by the scanning unit 200 in the scanner unit 30, but the scanning unit 200 is moved to a position on the original table 1 which is out of the original document. In this state, due to the rising habit of the document table 1, the document table 1 and the main document BO bite into the scanner unit 30 and the smooth movement of the scanning unit 200 is hindered. Therefore, with the platen 1 raised to an appropriate position, fix the platen 1 and
It is necessary to prevent the document table 1 and the main document BO from excessively biting into the scanner unit 30 due to the rising behavior of the document table 1.

Further, as will be described later, the scanning unit 200
When scanning the original on the contact glass 206 arranged on the upper part of the scanner unit 30 by switching the scanning optical path inside, the lower part of the scanning unit 200 and the upper surface of the original platen 1 are prevented from contacting each other. It is necessary to retract the document table 1 below. The platen pressurizing / fixing switching device and the document platen retracting device are devices for solving these problems, and FIGS. 22 to 27 show configuration examples of a mechanism in which both these devices are combined by one mechanism.

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

As shown in FIGS. 23 and 24, 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 into the rotational movement of the control pulley 48. The control wire 40 wound and extended on the control pulley 48 is constantly pulled by one end of a tension spring 43 hung 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, as shown in FIG.
It is supported by the shaft 54 via the one-way clutch 51. The shaft 54 is supported by a pair of side plates 55 on a slide bearing 52, and both ends of the shaft 54 are prevented from coming off by E-rings 53, so that the side plate 5 is interposed via the slide bearing 52.
It is rotatably supported with respect to 5. This causes the control pulley 48 to move toward the shaft 54 with respect to the arrow a in FIG.
Although the shaft 54 can freely rotate in the direction, it cannot rotate relative to the shaft 54 in the direction opposite to the arrow a by the action of the one-way clutch 51.
Rotates together with. Therefore, when the shaft 54 is fixed by the mechanism described later, the control pulley 48 becomes rotatable only in the direction of arrow a in FIG. 22, that is, in the rotation direction when the document table 1 is lowered.

Next, the lowering / fixing operation of the original platen 1 by this original platen pressurization / fixing switching device will be described. Figure 2
2 to 24, when the shaft 54 is in a fixed state, when the original table 1 is pushed down by some external force, for example, the weight of the original document BO or the pressure applied by a curled page, the original table 1 is pushed down. The end of the control wire 40 fixed to the side on the hook 41 side is loosened. At the same time, the control pulley 48 is pulled by the tension spring 43 and rotates in the direction of the arrow a while absorbing the slack on the hook 41 side of the control wire 40, and the control wire 40 maintains the initial tension to the hook 44 side. Moving.

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

Here, the fixing of the shaft 54 is performed by a document table lifting mechanism described below. That is, as shown in FIG. 25, the gear 56 is fixed to the shaft 54 so as to rotate integrally with the shaft 54.
Further, as shown in FIG. 26, the gear 56 is provided with a side plate 55.
The gear 57 meshes with another gear 57 rotatably supported by a stud 59 fixed to, and the rotation is transmitted to the gear 57.

Further, the gear 57 is formed integrally with the worm wheel 58, and the worm wheel 58 is constituted so that the worm gear 60 fixed to the output shaft of the document table raising / lowering motor 61 meshes with the worm wheel 58. With this configuration, when the document table raising / lowering motor 61 is stopped, the worm wheel 60 cannot rotate due to the meshing between the worm gear 60 and the worm wheel 58, and the gear 56 meshed with the gear 57 integrated with the worm wheel 58. The shaft 54 connected through the is fixed.

Next, the operation of retracting the document table 1 below the document table unit 35 will be described. 25 to 27, when the platen raising / lowering motor 61 is driven so that the gear 56 rotates in the direction of the arrow b, the one-way clutch 51 causes the control pulley 48 and the shaft 54 to rotate integrally, and the control pulley 48. 22 rotates in the direction of arrow a in FIG. 22, and the control wire 40 moves to the hook 44 side.

By the movement of the control wire 40, FIG.
In FIG. 3, the left and right original plates 1 are lowered, and the upper surface of each original plate 1 (the original surface of the original document BO in this example) is retracted to a position below the original plate unit 35, which is separated from the scanning unit 200. This retracting operation is executed when the power of the apparatus main body is turned on or when the apparatus is in a standby state in which scanning for reading is not performed, and when an original document on the contact glass 206 arranged above the scanner unit 30 is read.

Next, the operation of pressing the document table 1 above the document table unit 35 will be described. Contrary to the above-described retracting operation, in FIGS. 25 to 27, when the document table raising / 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. 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 pushing the document table 1 upward is set to be stronger than the force pulling the control wire 40 downward.

Therefore, when the control pulley 48 can freely rotate in the direction opposite to the direction of the arrow a as described above, the control wire 40 is moved to the hook 41 side by the force of the torsion spring 13 that pushes the document table 1 upward. Move to. By the movement of the control wire 40, the left and right manuscript tables 1 are raised in FIG. 27, and the manuscript surface of the main manuscript BO which is opened and placed on the upper surface of each manuscript table 1 is pressed by the scanning unit 200. .

In this way, the left and right manuscript tables 1 are raised,
When the document table raising / lowering motor 61 is continuously driven in a state where the document surface on each document table 1 is in pressure contact with the scanning unit 200, the shaft 54 can be freely rotated with respect to the control pulley 48 by the action of the one-way clutch 51. Thus, the pressure contact state of the document surface to the scanning unit 200 is maintained. This pressing operation is executed only when the scanning unit 200 is on the document table 1, as described later.

As shown in FIG. 27, the platen pressurizing / fixing switching device and the platen retracting device are provided with a pair of left and right platen plates 1.
One set is provided for each of them, and they are independently controlled according to the moving position of the scanning unit 200. That is, a pair of left and right platen raising / lowering motors 61, which are driving sources for the platen pressure fixing / switching device and the platen retracting device, are driven by the microcomputer in the IPU 103 as shown in FIG. Are controlled independently of each other.

FIG. 28 shows the downward retracting operation of the document table 1 in the retracting operation mode described above, and FIG. 29 shows a timing chart thereof. In this retract operation mode, I
As shown in FIG. 29, the microcomputer in the PU 103 reverses the left and right platen raising / lowering motors by a predetermined number of revolutions before starting the movement of the scanning unit 200 to move the left and right platen 1 as shown in FIG. Lower down.
After that, 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 finishes the save operation mode,
Rotate the left and right platen lift motors forward a specified number of times,
Return the left and right platens 1 to their original positions.

Next, the pressing / fixing mode of the document table 1 will be described. When setting the original document BO on the TPS, as shown in FIG. 30, the spine of the original document BO is applied to the back support plate 14, the size stopper 27 shown in FIG. The document is moved according to the thickness of the document BO. By this movement of the slide plate 3, the spine cover of the original document BO is pinched by the inner ends of the left and right original plates 1, and in this state, the slide plates 3 are fixed by the size stoppers 27, and then the original document BO The reading start page is opened, the two-page spread original document is set on the left and right document tables 1, and the scanner unit 30 is closed. As a result, as shown in FIG. 20, the open / close lock claw 32 engages with the fixed pin 19 and the scanner unit 30 is locked with respect to the document table unit 35 in the closed state. At this time, the open / close lock sensor 20 detects that the scanner unit 30 is closed.

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

By setting the main document as the center reference in this way, the control timing (reading start; reading start;
(Reading end timing, page turning start timing, etc.)
Is relatively easy to take. Further, by setting the main document as the center reference in this manner, it becomes easy to detect the edge of the main document, which is also an advantage.

On the other hand, when reading the document set on the contact glass 206 of the scanner unit 30,
As shown in FIG. 7, the right end portion of the scale 207 arranged on the left side of the contact glass 206 serves as the end face reference with the reference set position of the document. As described above, in this case, the reference set position is different from the reading start position of the original 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 in this way, the reading start point of the document set on the contact glass 206 is always constant,
The control becomes easy.

When the TPS enters the sheet mode for reading the original on the contact glass 206, the scanning unit 200 moves to the left from the center home position and stops at the edge home position detected by the edge HP sensor. (FIG. 30), wait until the reading condition is input and the start button is pressed. Further, here, the scale 207 is arranged on the right side of the contact glass 206, that is, on the page-turning start side of the original document, the original document is placed on both the original table 1 and the contact glass 206, and the scanning unit 200 scans the original document. It is possible to read the original on the contact glass 206 at the same time as turning the original on the original table 1.

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

Further, the original document BO is set on the document table 1 and the sheet document SO is set on the contact glass 206, and the scanning unit 200 is scanned from the end home position to read the original document BO on the document table 1. This scanning unit 2
While turning the pages of this manuscript 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 during the read page turning operation of the main document BO, the read page turning operation of the main document BO is interrupted by setting the sheet document SO on the contact glass 206 and setting the interrupt mode. Both originals can be read without scanning. Here, the scale 207 is the contact glass 206.
An image obtained by reading the original on the contact glass 206, whichever is arranged on the upper side, is mirror-inverted in the main scanning direction and stored in the frame memory 104.

In this example, the reference set position of the original on the original table 1 and the contact glass 206 in the depth direction is configured such that the front side of the apparatus main body is the abutting reference, and the original table 1 and the contact are set. The original setting operation on the glass 206 is facilitated. Further, when the operation of the scanning unit 200 in this example is started, the central H
The P-sensor again confirms that the scanning unit 200 is in the central home position. Then, 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.

30 to 34 are transition diagrams of the scanning unit 200 when the original table 1 is in the pressure / fixing mode.
FIG. 35 shows the timing chart. As shown in FIG. 30, the end home position of the scanning unit 200 is a read page turning operation start point for the original document BO and an operation end point thereof. Further, in this end home position, the scanning unit 20
0 is not on the platen 1.

In the pressurizing / fixing mode of the original table 1, first, the microcomputer in the IPU 103 normally rotates the scanner motor 106 of the scanning unit 200 to move the scanning unit 200 rightward in FIG. Next, in the microcomputer in the IPU 103, the document pressing roller 281a on the right side of the scanning unit 200 is set to the document B.
When it reaches the left end of O (point A in FIG. 31), the left platen raising / lowering motor is normally rotated to put the left platen 1 on pressure. As a result, the original document BO is pressed against the scanning unit 200, and optimum reading is performed.

Then, as shown in FIG. 32, a short time before the scanning unit 200 reaches the center point of the main document, the right document pressing roller 281a contacts the left end of the right document table 1 (point B in FIG. 35). . IPU10 at this point
The microcomputer in 3 causes the right platen raising / lowering motor to rotate in the forward direction to put the right platen 1 in a pressurized state. Then, the scanning unit 200 passes the center point of the book document and starts reading the right page of the book document BO.

After that, the left document pressing roller 281b is applied to the right end of the left document table 1 (point C in FIG. 35). At this point, the microcomputer in the IPU 103 stops the left platen lifting motor and fixes the left platen 1 in a fixed state. As a result, the original document BO does not bite into the scanner unit 30 and the original pressing sheet 2
82b is pressed and fixed to the next scanning unit 200.
Keep the same height until the passage of.

FIG. 33 shows an operating state of the scanning unit 200 during reading or turning of the right page of this document. The microcomputer in the IPU 103 stops the scanning unit 200 that has finished reading the right page of the original document in a state where the left original pressing roller 281b hangs on the right end of the right original table 1 (point D in FIG. 34), and then stops. , I
The microcomputer in the PU 103 reverses the scanner motor 106 to move the scanning unit 200 leftward in FIG. As a result, the scanning unit 200
32. While turning up the right page of the original document BO, it moves to the left, and slightly before reaching the center point of the original document shown in FIG. 32, the left original pressing roller 281b is applied to the right end of the left original table 1 (point C). . At this point, the microcomputer in the IPU 103 causes the left platen raising / lowering motor to rotate in the normal direction to bring the left platen 1 into a pressurized state.

Then, the scanning unit 200 starts the operation of passing the central point of the original document BO and superposing the turned up right page on the left page of the original document BO. After that, the right document pressing roller 281a contacts the left end of the right document table 1 (point B). At this time, the microcomputer in the IPU 103 stops the right platen raising / lowering motor to fix the right platen 1 in a fixed state. As a result, this original B
O is pressed and fixed on the document pressing sheet 282a without biting into the scanner unit 30, and keeps the same height until the next scanning unit 200 passes. Then, the microcomputer in the IPU 103 moves the scanning unit 200 to the end home position shown in FIG. 30 and stops it.

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

FIG. 27 shows TPS (Turn the P
FIG. 1 is a diagram showing the overall configuration of the page scanner (page turning reader). In this TPS, a contact glass 206 is arranged on the upper part of the main body of the device, and a document such as a sheet material or a thick main document 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 document with the scanning unit 200, the document image on the contact glass 206 can be read. The upper half of the main body of the TPS device is the scanner unit 30, and the scanning unit 200 has the interior of the scanner unit 30 shown in FIG.
In, a document is scanned by traveling in the left-right direction. FIG. 36 shows a configuration diagram of the scanning drive system of the scanning unit 200.

FIG. 36 shows the scanning drive system of the scanning unit 200 as seen from above the apparatus body. The timing belt 312 has a pulley 304 and a three-stage pulley 30 on the inner side of the apparatus main body.
2, the 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. Pulley 304 and pulley 30
The rotation shaft of No. 5 is supported by a spring 307 and a spring 308, respectively, and applies a predetermined tension to each timing belt 312, 313.

The three-stage pulley 302 is the timing belt 3
The motor pulley 301 is connected to the motor pulley 10 at 10, and the two-stage pulley 306 is connected to the timing belt 311 at each time.
The timing belt 311 connects the idler 303 to the spring 30.
A predetermined tension is obtained by pulling outward at 9. The rear side and the front side of the scanning unit 200 are fixed to the timing belts 312 and 313 by the clamp 315, and the timing belt 31 is rotated by the rotation of the scanner motor 106 that drives the rotation shaft of the motor pulley 301.
2, 313.

FIG. 37 shows the structure of the scanning unit 200. Original pressing rollers 281a and 281b are rotatably supported on the left and right sides of the lower side of the scanning unit 200, and sheet winding rollers 280a and 280b are rotatably supported on the outer sides thereof. Each sheet winding roller 280a,
280b includes left and right independent document holding sheets 282a,
282b is wound around the center end thereof, and the outer ends of the document pressing sheets 282a and 282b are fixed to the side plates of the scanner unit 30, respectively. These document pressing sheets 282a, 282
Reference numeral 82b is a sheet-shaped member in which a rubber resin is melted from both sides to a cloth (cloth) woven with Tetoron yarn, and the unevenness of the cloth left on the surface causes an attraction force by charging to act. It has a difficult structure.

Further, the sheet take-up rollers 280a, 2
As shown in FIG. 38, one of the structures 80b has a double structure, and the take-up roller shafts 251a and 251.
b and cylindrical sheet winding rollers 280a, 280b
The spring springs 252a and 252b are attached between and. As a result, the take-up roller shaft 251
By rotating a and 251b further than the state in which the document pressing sheets 282a and 282b are stretched, a certain amount of tension can be applied to the document pressing sheets 282a and 282b by the action of the spiral springs 252a and 252b.

Further, as shown in FIG. 39, sheet winding gears 232a and 232b are fixed to the outer ends of the respective winding roller shafts 251a and 251b, and these sheet winding gears 232a and 232b are The left and right ends are fixed to the side plates of the scanner unit 30, and each idle gear 2 is attached to the drive rack 231 having teeth over substantially the entire length.
They are meshed with each other via 33a and 233b.
As a result, when the scanning unit 200 travels in FIG. 39, the sheet winding gears 232a and 232b rotate together with the idle gears 233a and 233b, and the winding roller shafts 251a and 251b and the spiral spring 2 respectively.
52a, 252b and each sheet winding roller 28
0a, 280b, through the respective original pressing sheet 282a,
282b is pulled out and wound up, and the tension of the left and right sheet winding rollers 280a and 280b is constantly
It is kept almost constant.

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

On the other hand, as shown in FIG. 37, a platen glass 205 for reading the original and a turning belt 208 for turning the pages of the original are arranged between the original pressing rollers 281a and 281b. The platen glass 205 for reading the original document is arranged on the upstream side in the reading scanning direction of the scanning unit 200, and the turning belt 208 for turning the pages of the original document is arranged on the downstream side in the reading scanning direction of the scanning unit 200. There is. By arranging in this way, the run-up section for the reading scanning of the scanning unit 200 can be lengthened and the scanning can be stabilized. Further, in this example, the page turning mechanism is arranged on the lower side of the same unit and the reduction optical system is arranged on the upper side to realize the miniaturization of the apparatus.

Further, with this configuration, the scanning unit 200 receives the main document (details will be described later) pressed by the left document pressing roller 281b and the turning belt drive roller 223, and receives these documents. Since the document surface (reading surface 273) positioned between the rollers can be read, an optimum image can be obtained. At this time, platen glass 2
As shown in FIG. 40, the lower surface position of 05 corresponds to the left margin of the document pressing roller 2 in consideration of the margin of the floating of the document surface in advance.
It is set above the horizontal plane (reading surface 273) formed by connecting the lowest point of 81b and the lowest point of the turning belt drive roller 223 by a slight gap α. This gap α
The value of 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. 41, this platen glass 205 has its side portion supported by a glass holder 269. Further, a glass chamfered portion 271 is provided at the lower end portion of the platen glass 205, and a holder chamfered portion 270 is provided at the outer lower end portion of the glass holder 269. At this time, the position of the side corner portion 272 of the glass chamfered portion 271 is configured to be located above the lower surface of the glass holder 269 by a slight height β, and the platen glass is operated during the operation of the scanning unit 200. The side of 205 is prevented from catching the page edge of the original document.

On the other hand, inside the platen glass 205,
As shown in FIG. 37, two fluorescent lamps 20 for illuminating the original are provided.
Reference numerals 1 and 202 are arranged on the left and right sides of the document reading section. The original document image illuminated by these fluorescent lamps 201 and 202 is shown in FIG.
The second mirror 220 and the third mirror 221 after being reflected by
Alternately, and finally passes through the lens 216 to be reduced and imaged on the CCD of the reading sensor 101. Also,
The turning belt 208 is a turning belt drive roller 223.
It is wound around the turning roller 224, and the turning belt drive roller 22 above the turning belt 208.
A charging roller 225 is disposed in contact with the outside of the portion slightly separated from the No. 4.

Further, as shown in FIG. 39, a turning belt driving gear 234 is fixed to the end of the driving shaft of the turning belt driving roller 223, and the turning belt driving gear 234 is connected via an idle gear 235. , Is engaged with the drive rack 232. As a result, the scanning unit 2
When 00 travels, the turning belt driving gear 234 rotates along with the idle gear 235 along the driving rack 232, and the turning belt driving roller 223 rotates to rotate the turning belt 2 at the same speed as the moving speed of the scanning unit 200.
08 rotates.

When reading a document set on the contact glass 206, the switching mirror 222, which is retracted to a position off the reading optical path of the scanning unit 200 as shown in FIG. 37, is a keep solenoid shown in FIG. By the action of 255, the scanning unit 200 is moved to the position advanced into the reading optical path as shown in FIG. By the movement of the switching mirror 222, as shown in FIG.
As shown in FIG. 3, the first mirror 219 and the second mirror 220
The optical path between and is switched from the platen glass 205 side shown by the broken line to the contact glass 206 side shown by the solid line, and the original image on the contact glass 206 illuminated by the two fluorescent lamps 203 and 204 is the original document. Similarly to the case of, the second mirror 220 and the third mirror 221 alternately reflect, pass through the lens 216, and are reduced and focused on the CCD of the reading sensor 101.

As shown in FIG. 42, the switching mirror 222 is supported by a switching mirror bracket 257, and the switching mirror bracket 257 is rotatably supported by the upper fulcrum 258 of the optical path adjusting plate 259. . The keep solenoid 255 is arranged at the end of the switching mirror bracket 257 on the side opposite to the side where the switching mirror 222 is supported.
When 55 is turned on / off, the switching mirror bracket 257 is swung about the upper fulcrum 258 of the optical path adjusting plate 259 as an axis between the position shown by the broken line and the position shown by the solid line in FIG.

As a result, the position of the switching mirror 222 is set to the scanning unit 200 shown in FIG. 37, as described above.
43 is selectively moved to the original document reading position retracted from the reading optical path and the sheet original reading position 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 position of the broken line in FIG. 42) is not particularly restricted by the movement of the keep solenoid 255, but the advance position of the switching mirror 222 into the optical path (FIG. 42). (The position indicated by the solid line in FIG. 2) restricts the swing of the switching mirror bracket 257 by the positioning pin 256, and the switching mirror 222
Regulate the stop position in the optical path of.

The switching mirror 222 is constructed so that the switched optical path can be adjusted. That is, as shown in FIG. 42, the optical path adjusting plate 259 is used for the scanning unit 20.
The lower part of the unit main body of No. 0 is rotatably supported by the lower fulcrum 262, and the spring 260 is provided in contact with both side parts between the upper fulcrum 258 and the lower fulcrum 262.
It is supported substantially vertically by the adjusting screw 261.

The optical path adjusting plate 259 is urged by a spring 260 so that the optical axis adjusting plate 259 has a habit of rotating in a direction in which the upper fulcrum 258 thereof is switched and the switching mirror 222 is displaced.
The turning position of the optical path adjusting plate 259 due to this turning habit is determined by the head of the adjusting screw 261 arranged on the crocodile facing the spring 260 abutting on the side of the optical path adjusting plate 259. Therefore, this optical path adjusting plate 259
Rotates the adjusting screw 261 to lower the fulcrum 2
The position of the upper fulcrum 258 is varied around the axis 62, and the position of the switching mirror bracket 257 supported by the upper fulcrum 258 is displaced to change the position of the switching mirror 222.
It is possible to adjust the switched optical path by moving the position of.

In the optical system of the scanning unit 200, the mirrors other than the switching mirror 222 do not have the above-mentioned optical path adjusting function, and the optical path for reading the original document on the platen glass 205 side is adjusted by the reading sensor 101. The position of the CCD is adjusted, and the optical path for reading the original on the contact glass 206 side is adjusted by adjusting the position of the switching mirror 222 by the above method. As a result, 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, the connecting element thereof, and the like are housed in the scanning unit 200, and by removing the entire scanning unit 200 when exchanging the optical system element, its maintainability is improved. Is improving.

The above-mentioned optical path switching system may be configured as an optical system by a switching mirror rotation system as shown in FIG. In this example, the switching mirror bracket 264 supporting the switching mirror 222 is rotatably supported by the unit main body of the scanning unit 200 at a fulcrum 265. The solenoid 263 is arranged at the end of the switching mirror bracket 264 opposite to the side supporting the switching mirror 222. When the solenoid 263 is turned on / off, the switching mirror bracket is switched in the direction opposite to the solenoid 263. Spring 26 pulling 264
By the action of 6, the switching mirror bracket 264,
It swings about the fulcrum 265 as an axis between the position shown by the broken line and the position shown by the solid line in FIG.

As a result, the position of the switching mirror 222 is set at the main document reading position indicated by the broken line in FIG.
The sheet material document reading position indicated by the solid line is selectively moved. Here, when the optical path of the switching mirror 222 is switched to the optical path for reading the original document through the platen glass 205, the switching mirror 222 is attached to the positioning pin 268, and the stop position of the switching mirror 222 is indicated by the broken line position in FIG. Regulate so that
Further, when the optical path of the switching mirror 222 is switched to the optical path for reading the sheet original through the contact glass 206, the switching mirror 222 is attached to the positioning pin 267, and the stop position of the switching mirror 222 is the solid line position in FIG. Regulate so that

Next, the turning operation of the scanner unit 30 will be described. FIG. 45 shows an operation explanatory diagram of the page turning portion of the scanning unit 200. The turning belt 208 is made of PET, PC, PVC or the like, and its surface layer is a high resistance film having a surface resistance of 10 ¹⁴ Ω or more, and its back surface layer is a low resistance film having a surface resistance of 10 ⁸ Ω or less. It is composed of a resin film having a structure.

The turning belt drive roller 223 is
It consists of a metal roller that is grounded and the surface of which is coated with conductive rubber to ensure reliable belt drive and grounding. Further, the charging roller 225 is composed 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 the changeover switch 253a.

In FIG. 45, while the scanning unit 200 is running and the turning belt 208 is being driven, the changeover switch 253a is turned on at the timing described later, and a high voltage of ± 2 kV is applied to the charging roller 225 from the AC power source 253. Then, an alternating electric field is generated on the surface of the turning belt 208, and by the action of this alternating electric field, the top page 2 of the original document BO that comes into contact with the surface of the turning belt 208.
An attraction force for attracting 54 is generated.

When the manuscript reading operation is started,
As shown in FIG. 30, the scanning unit 200 at the left end home position of the scanner unit 30 starts traveling rightward in FIG. When the original reading position of the platen glass 205 of the scanning unit 200 reaches the left page of the main original BO, the optical system of the scanning unit 200 starts the reading operation of the main original BO as shown in FIG. The document surface of this book document 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 original document BO, and also differs from the reading start position of the document on the contact glass 206 (reference end of the scale 207). In this way, the optical system of the scanning unit 200 makes the original document BO
47, the document scanning direction of the scanning unit 200 is reversed as shown in FIG. 47, and as shown in FIG. 48, the page-turning operation of the right page of the original document BO which has been read is completed. Is started.

When the page turning of this original document BO is started, a page turning belt 208 and a page feed roller 25 described later are provided.
0 is at the position shown by the broken line in FIG. 45, and the charging pattern portion formed on the surface of the page-turning belt 208 precedes this page-turning operation and is the top page 25 of the original document BO.
Overlay on 4. Then, when the leading end of the top page 254 crosses over the center of the lower side of the turning belt 208, as shown in FIG. 48, the turning belt 208 and the page feed roller 250 are operated by a solenoid (not shown). , To the position shown by the solid line in FIG. As a result, only the uppermost page 254 of the original document BO is attracted onto the surface of the turning belt 208 by the attraction force due to the unequal electric field of the charge pattern formed on the surface of the turning belt 208, and the uppermost page 254 is absorbed. 254 end of belt 20
Lifted with 8. The attraction force due to the non-uniform electric field has a feature that pages other than the top page 254 are not attracted.

Here, as shown in FIG. 52, the timing of charging the turning belt 208 is such that the scanning unit 200 which returns at the same time as the reading of the original surface of the original BO is completed.
Since the charging of the turning belt 208 is started with the return operation of the scanning unit 20,
The operation of 0 is efficient and efficient. However, as shown in FIG. 52, the distance L1 from the document reading position of the scanning unit 200 to the lowest point of the turning belt drive roller 223 is set.
Is set to be 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 drive roller 223 (L1 ≧ L2), the scanning unit 200 performs the return operation. It may be set to start charging the turning belt 208 after the start.

As described above, the top page 25 of the original document BO is
After turning up 4, the scanning unit 20 is kept in this state.
As shown in FIG. 48, when 0 is moved toward the end home position, the top page 25 of this original document BO is
As shown in FIG. 49, the sheet No. 4 is sandwiched between the page turning roller 224 and the page feed roller 250 and is reliably conveyed, and a pair of upper and lower page guides 22 arranged on the right side of the scanning unit 200.
7 and 228 (FIG. 37) to pass the scanning unit 2
The front end side is sent to the outer right side of 00. At this time, the page turning sensor 214 (FIG. 37) mounted on the page guide 227 on the upper side of the scanning unit 200 detects the original page sent to the outer right side of the scanning unit 200, and the original page is detected. Judge that the page has been turned over 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, and therefore this turning is performed. The scanning unit 200 can be miniaturized because it does not damage the raised original page and it is not necessary to dispose a page storage means for storing the turned-up original page in the scanning unit 200.

Then, as shown in FIG.
When the uppermost page 254 of the above is turned up to the binding portion of the original document, the turning belt 208 and the page feed roller 250 are returned to their original positions (positions indicated by broken lines in FIG. 45). In this state, when the scanning unit 200 is further moved toward the home position of the end portion thereof, as shown in FIG. 51, the turned-up original page is pulled by the binding portion of the original document and a pair of page guides are pulled. While returning between 227 and 228, the document is ejected from the scanning unit 200 so as to be superposed on the left page of the document BO.

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

Next, the structure of the scanning rails of the scanning unit 200 will be described. The scanning unit 200 is shown in FIG.
As shown in FIG. 2, the scanning optical system unit 336 in which the above-described optical system is arranged is provided on the front side and the rear side of the scanner unit 30 with respect to the pair of scanning side plates 337a and 337b. The support rod 344a and the one 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 arranged on the front side and the back side thereof, and the scanning optical system unit 336 thereof.
Scan optical system unit 3 so that it is not twisted
36 is configured to learn only for the scanning side plate 337a arranged on the front side.

On the other hand, on the side plate of the scanner unit 30,
Two scanning rails 343a and 343b, which are parallel to each other, are disposed on the front side and the rear side of the scanning rail 343 with their left and right ends fixed. These scanning rails 343a and 343
b has a substantially L-shaped cross-section, and the roller brackets 338a and 338b surround the scanning rails 343a and 343b so as to surround the scanning rails 343a and 343b.
It is attached to each 337b.

These roller brackets 338a, 338
Positioning rollers 339a and 339b are provided in the position b so that the horizontal portions of the scanning rails 343a and 343b are sandwiched therebetween.
And pressing rollers 340a and 340b are rotatably arranged.

Here, each positioning roller 339a, 339
Reference numeral b denotes a function of determining the vertical position of the scanning unit 200 at the time of reading the main document and at the time of turning pages. On the other hand, each presser roller 340
The a and 340b are configured to press the horizontal portions of the scanning rails 343a and 343b from above.

That is, these pressing rollers 340a, 3
As shown in FIG. 54, 40b is rotatably supported at the free end of a pressing roller bracket 346 formed in a substantially bell crank shape. This press roller bracket 346
Is the center portion of each roller bracket 338a, 338
It is rotatably supported by a stud 347 fixed to b. Further, between the base end portion of the pressing roller bracket 346 and each roller bracket 338a, 338b,
A pressure spring 345 is stretched around. As a result, the pressing roller 340a, 34a
0b presses the horizontal portion of each scanning rail 343a, 343b from above.

By pressing the pressing rollers 340a and 340b against the horizontal portions of the scanning rails 343a and 343b, the scanning unit 200 and the scanner unit 30 are pressed.
Of the scanning unit 339a and 339b are brought into contact with the lower surfaces of the horizontal portions of the scanning rails 343a and 343b by the displacement habit of the scanning unit 339a and 339b. 200 is positioned.

Further, the scanning unit 200 includes a lateral pressing roller 341 rotatably supported by a roller bracket 338a on the front side and the above pressing rollers 340a and 340b.
Roller bracket 338b on the back side with a pressure structure similar to
The horizontal pressing roller 342 for pressing the inside of the scanning rail 342 is arranged so that the horizontal portions of the scanning rails 343a and 343b are sandwiched from both outsides, respectively, so that the positioning in the depth direction is performed.

55 to 58, the page feed roller 250 is shown.
The configuration and action of The page feed roller 250 is shown in FIG.
Also, as shown in FIG. 56, a plurality of rollers are fixed to the portion of the shaft 248 corresponding to the width of the turning belt 208 at predetermined intervals. The page feed roller 250 is made of a material such as soft resin such as foamed polyurethane or rubber.

On the other hand, the width of the turning roller 224 is formed larger than the width of the turning belt 208, as shown in FIG.
As shown in FIG. 3, both ends of the turning roller 224 extend outside the turning belt 208. A drive roller 249 having a diameter slightly smaller than the diameter of the page feed roller 250 is 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 a page feed roller 250.
It is made of a material such as rubber, which has a higher degree of hardness.

This page feed roller 250 fits in the recess of the lower page guide 228 whose tip is formed in the shape of a comb when it is retracted to the position shown by the broken line in FIG. 45 (when viewed from the side). They are located so that they overlap each other).
Further, when the turning belt 208 is raised to the position shown by the solid line in FIG. 45, the page feed roller 250 also moves to the position shown by the solid line in FIG. 45, and each drive roller 249 is extended to both ends of the turning roller 224. Abutting on each other, a part of the peripheral surface of the page feed roller 250 moves to a position where the turning belt 208 slightly pressurizes the peripheral surface.

As a result, the page feed roller 250 moves to the position shown in FIG.
As shown in FIG. 6, the page feed roller 250 is provided with a conveying force for the document page which is deformed by the diameter difference from the driving roller 249 and turned up by the turning belt 208. The rotational force of the page feed roller 250 is given by the rotational force of the turning roller 224 being transmitted through the drive roller 249 that is in contact with the page feed roller 224. At this time, the driving roller 249 rotates at the same peripheral speed as the contacting roller 224, but the page feed roller 250 rotates at a large peripheral speed because the diameter thereof is larger than that of the driving roller 249. As a result, "the linear speed of the page feed roller≥the linear speed of the turning belt", and a reliable page conveying force for the turned-up original page can be obtained. On the other hand, as shown in FIG. 51, 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 shown by the broken lines in FIG. 45, respectively.

Page feed roller 25 constructed as described above
The operation of 0 is controlled by the toggle joint device shown in FIGS. 57 and 58. The 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 as shown in FIGS. 57 and 58.
Is rotatably supported at one end of the. The toggle lever 274 is rotatably supported by the scanning unit 200 at a fulcrum 275. In addition, the scanning unit 200
An elastic spring 279 is stretched between the fixed pin 276 and the shaft 248 which are planted in the shaft, so that a straight line passing through the fixed pin 276 and the fulcrum 275 serves as a neutral line 278. Is configured.

As shown in FIG. 57, this toggle mechanism is in a state where the page feed roller 250 is retracted from the turning belt 208 to the position shown by the broken line in FIG. 45, and the turning roller 224 is shown by the solid line in FIG. When the ascending movement is started toward the position shown, the rotating shaft 224a of the turning roller 224 is
Engages with the other end of the toggle lever 274 and further rises while rotating the toggle lever 274. At this time, the shaft 2 is rotated by the rotation of the toggle lever 274.
The tension force of the spring 279 tries to return the page feed roller 250 to the original position until 48 exceeds the neutral line 278. However, when the shaft 248 crosses the neutral line 278, the tension force of the spring 279 increases. , 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.
In the state where it has finished rising to the position shown by the solid line,
By the tightening force of 9, the driving rollers 249 come into contact with the extending portions of both ends of the turning roller 224, and a part of the peripheral surface of the page feeding roller 250 is moved to a position where the turning belt 208 slightly pressurizes it. .

On the other hand, as shown in FIG. 51, when the turned-up original page is discharged from the scanning unit 200,
When the turning roller 224 retracts to the position shown by the broken line in FIG. 45, the turning roller 224 descends from the position shown in FIG. 58 while pushing the drive roller 249.
As a result, when the shaft 248 crosses the neutral line 278, the elastic force of the spring 279 acts in the direction of retracting the page feed roller 250 to the position shown by the broken line in FIG. 45, and the page feed roller 250 is shown in FIG. The turning roller 224 is returned to the original position by retracting to the position.

As described above, since the page feed roller 250 moves from its retracted position in the direction in which it comes in contact with the turning belt 208 in association with the upward drive of the turning belt 208, the drive mechanism of the page feeding roller 250 is changed. It can be constructed inexpensively and compactly. The movement of the page feed roller 250 is
After the flipping belt 208 starts to rise, it starts with a certain time lag (in the latter half of the raising of the flipping belt 208). Belt 20
Even when protruding from 8, this turning belt 208
The end portion of the original page can be securely sandwiched between the page feed roller 250 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 pressure original platen is released, and the pressure original platen is pressed against the scanning unit 200 with a spring property, and the upper and lower sides of the original document are arranged so that the top page of the original document becomes a uniform plane. The directional displacement is automatically corrected. Further, the movement of the end portion of the document in the left-right direction is corrected by changing the leading edge position, the trailing edge position, and the page turning position by repeating the page turning.

FIG. 79 shows the image forming section of this system.
The image forming unit includes a printer main body 701 including the laser printer, a sorter 702 as a peripheral device thereof, a reversing unit 703, a double-sided unit and a large-volume sheet feeding tray 70.
4 bank 705.

In the printer body 701, the photosensitive drum 706 is rotationally driven by the driving unit and uniformly charged by the charger, and then an image is written by the image exposure by the semiconductor laser 105 to form an electrostatic latent image. The electrostatic latent image is developed by the developing device to become a visible image. Paper is fed from a selected one of the paper feed trays 707 and 708 and the large-volume paper feed tray 704 to a registration roller (not shown), or paper is manually fed from the manual feed table 709 to the registration roller, and the registration roller When the registration clutch is turned on at a predetermined timing, is connected to a drive source and is rotationally driven to send out the fed paper. The sheet sent from the registration roller is transferred to the photosensitive drum 706 by the transfer charger 710.
The visible image above is transferred to the upper surface and the separation charger 7
After being separated from the photosensitive drum 706 by 11, the visible image is fixed by the fixing device 712, and the reversing unit 70
Sent to 3. The residual toner on the photoconductor drum 706 is removed by a cleaning device after the paper is separated.

In the reversing unit 703, in the normal mode, as shown in FIG. 80, the paper from the fixing device 712 is ejected by the ejection roller 714 through the branching claw 713 and is accommodated in the upper paper ejection tray with the image surface facing upward. To be done. In the sort mode, as shown in FIG. 81, the paper from the fixing device 712 is sent to the lower carrying path by the branching claw 713, carried by the carrying roller 715, and discharged by the discharging roller 717 via the branching claw 716. Sorters 702 sort the bins.

In the double-sided copy mode, as shown in FIG. 82, the paper on which the surface image is formed from the fixing device 712 is sent to the lower carrying path by the branching claw 713 and carried by the carrying roller 715, and the branching claw 718. By bank 70
The sheet is sent to the side of No. 5 and is sent to the double-sided reversing unit 700 provided in the bank 705 in the vertical direction by the conveying roller 719. As shown in FIG. 79, the double-sided reversing unit 700 switches back the sheets fed by the conveying rollers 719 and feeds them to the double-sided tray 720 so that the image forming surface faces upward, and stacks them. The double-sided tray 720 re-feeds the stacked sheets, and the sheets are discharged as a double-sided copy to the sorter 702 or the sheet discharge tray by the reversing unit 703 after the image is transferred and fixed on the back side as described above.

In the reversing mode, as shown in FIG. 83, the paper from the fixing device 712 is sent to the lower carrying path by the branching claw 713, carried by the carrying roller 715, and sent to the bank 705 side by the branching claw 718. Then, it is sent to the double-sided reversing unit 700 by the carrying roller 719. The double-sided reversing unit 700 switches back the sheet fed by the conveying roller 719, and the sheet is conveyed to the upper side by the reversing and returning roller 721. This inversion return roller 7
The sheet from 21 is conveyed by a conveying roller 722, and is ejected by a sheet ejecting roller 717 with the image forming surface facing down.
At this time, the original document is read in page order and the read images are formed on the paper, so that the paper discharge roller 717 is formed.
The paper ejected from the page is kept in page order.

Next, the detection of the right end of the original document in the sub-scanning direction will be described. FIG. 59 shows data for detecting the right end portion of the spread book document by the reading sensor 101 in the image reading method before the first page turning. The detected right end portion of the book document is a read sensor when the spread book document is the size A3. The position of 101 is about 21 from the center set position
The position is 0 mm. FIG. 65 shows data for detecting the right end portion of the double-page spread original document by the reading sensor 101 in the image reading method before the first page turning. The directional position is about 180 mm from the center set position.

During the page turning scanning after the image reading scanning,
Edge detection is started from the position of the outer frame of the document table, the outer frame of the document table is first read by the reading sensor 101, and then the black document table is read. Reading sensor 101
Reads the step between the inside of the right cover and the edge of the page in this manuscript, then reads the background density which is the margin of the top page,
Generally, the image is read after a margin of ten and several 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 portion of the uppermost page is detected, and the position is discriminated as the page end portion.

FIG. 60 shows the right end portion detection circuit of this document. The right end portion detection circuit of the original document detects the right end portion of the original document 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 the 1024th pixel 64 mm from the reference of the reading sensor 101 in front of the apparatus in order to correspond to the original document placement reference on the front side and the minimum document size. The counter 401 is reset by a synchronization signal LSYNC synchronized with the main scanning of the reading sensor 101, counts a clock CLOCK synchronized with the pixel signal from the reading sensor 101, and synchronizes with the pixel signal of the 1024th pixel from the reading sensor 101. Output the rising output signal.

The data latch circuit 402 is the counter 401.
The pixel signal of the 1024th pixel in the image signal DATA from the reading sensor 101 is latched for each main scanning at the rising edge of the output signal of. 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 the threshold value. This threshold is set by the microcomputer in the IPU 103. The data from the digital comparator circuit 403 is delayed by one main scanning time by the D flip-flop circuits 404 and 405, and the AND circuit 406 removes the data from the digital comparator circuit 403 and the data from the D flip-flop circuits 404 and 405. Then, when the value of the data of the specific pixel of the reading sensor 101 is larger than the threshold value by 3 pixels in the sub-scanning direction, a detection signal is generated to notify the microcomputer in the IPU 103.

In the reading for detecting the end portion of the main document, the microcomputer in the IPU 103 causes the scanning unit 200 to start scanning to the left from the black main document table 1 at the right end portion in the scanning direction or the outer frame portion thereof. , Data latch circuit 402 and D flip-flop circuits 404 and 405
The reset signal RESET for starting the detection of is released. Then, a striped pattern portion of the main document which is continuous in the main scanning direction due to the edge or edge of the paper is detected by the reading sensor 101, and the image information on the right page is randomly detected from the end of the uppermost page of the main document.

The background of most books is white, and in general, there is no character or image in the frame part that is more than ten millimeters from the end of the document. Therefore, the digital comparator circuit 403 determines and detects the blank portion of the page when the pixel signal of the 1024th pixel from the reading sensor 101 becomes the data of the white uniform color equal to or more than the threshold value. The accuracy of this determination can be improved by using the data of a plurality of pixels of the reading sensor 101 in the main scanning direction.
The number of pixels for the determination is the D flip-flop circuit 40.
Although 4 and 405 and the AND circuit 406 form three continuous pixels, it is also effective to increase the number of pixels or change the threshold value of the digital comparator circuit 403 according to the system and the adapted document. As a result of the above, when the spread book document of size A3 as shown in FIG. 59 is detected, the end of the book document is detected as a point 200 mm from the home position, and as shown in FIG. Is detected at a point 180 mm from the home position.

This original set on the basis of the center binding section is
The position of the leading edge of the image changes depending on the size, the page position changes depending on the double-page spread, and the page length changes depending on the binding portion. The result of detection of the edge of the document in the sub-scanning direction is IPU103.
It is used by the microcomputer inside to calculate the page suction position and the page rising position for turning pages. In another example, at the time of reading the original document, the left edge portion of the double-page spread original document is detected from the left portion of the original plate of the image data of the reading sensor 101 by the left edge portion detection circuit of the original document right edge portion detection circuit. It The microcomputer in the IPU 103 uses the detection signal at the end of the main document in the sub-scanning direction to determine the effective image range of the main document in the sub-scanning direction.
For example, in copying, it is used as a resist for determining the image position on the transfer paper, and an image outside the image effective range in the sub-scanning direction is automatically erased to prevent useless black solid images. When applied to a file system, etc., IP
The microcomputer in U103 reduces the image data by the detection signal of the end portion in the sub-scanning direction of the original document to save the memory amount.

Next, the detection of the end portion of the main document in the main scanning direction will be described. FIG. 61 shows an edge detection circuit for the main document in the main scanning direction. The reading sensor 101 detects the end portion of the document in the main scanning direction.
This is performed by changing the read data of one line of main scanning. The main document table 1 is a drawer type, and the main document table 1 is pulled out to the front side of the apparatus and the main document is set thereon. Figure 6
As shown in FIG. 2, the two-page spread original document BO is aligned on the main document table 1 with the left end of the binding portion as the reference and with the left end of the back support plate 14 as the reference. The front cover of this document is fixed to the fixing plate placed on the left manuscript table 1 and the back cover of this manuscript is fixed to the fixing plate placed on the right manuscript table 1 to bind during continuous reading of this manuscript. Prevents displacement of the top page due to displacement of part shape. The procedure for setting this document is as follows.

The drawer of the document table is opened.

The left cover of the original document is held by the fixing plate on the left document table with the left end of the binding portion and the front side as a reference. Hold the right cover of this document with the fixing plate on the right document table. The reading start page of the original document is opened, the original document pressing claw is set, and the original document table is raised to make the upper page of the original document flat.

The drawer of the original platen is closed.

In this system, the maximum size of the original document is a spread with A3 size and the minimum size is B5 size. Further, there are sizes other than the standard sizes, such as A series and B series, of the original document, and in many cases, the contraction of the page due to the bending of the binding portion in the spread direction is not constant in the aspect ratio of the page. In this system, as shown in FIG. 62, since the original document is set on the document table 1 with the central front side reference,
The left edge, right edge, and top edge of the page differ depending on the size of the two-page spread original. That is, the image leading edge position and the trailing edge position in the sub-scanning direction and the trailing edge position in the main scanning direction change.

As shown in FIG. 62, at the time of page-turning scanning after the image reading of the original document, the end portion of the original document is detected from the position of the black outer frame of the original document outside the maximum original size of the two-page spread original document in the sub-scanning direction. Then, the black original table is read, and the end portion is detected on the side of the spread original document. In this edge detection, the read data of the specific pixel in the sub-scanning direction of the read sensor 101 is continuously sampled, the data is compared with the threshold value, and the pixel whose read data is larger than the threshold value is repeated a plurality of times. The position is the page end position of the document in the sub-scanning direction. The microcomputer in the IPU 103 calculates a page suction / up position for page turning from the page edge position in the sub-scanning direction, scans the scanning unit 200 to that position, and temporarily stops it.

Next, the microcomputer in the IPU 103 detects the end portion in the main scanning direction at the position where the scanning unit 200 is temporarily stopped. The two-page spread original is set on the front side of the center, and the read data for one main scanning line is sampled at the position where the page adsorbing / raising position, that is, the image reading position is definitely on the two-page spread original. The data for one line starts from the position of the black outer frame of the original document table on the inner side of the maximum original document size, and then the black original document table and the spread original document. 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 in the main scanning direction is the main scanning direction. It is set at the page edge position.

In the example shown in FIG. 62, reading is performed in the direction of the arrow in both the main scanning direction and the sub scanning direction, and the edge position of the original document is calculated from the data. For example, if the size of the double-spread original document is B4 size, the left and right ends of the original document are about 182 mm from the center set position and about 257 from the front end.
mm. The scanning of the scanning unit 200 is started from the left home position where the reading scanning is started, and the read image data is stored in the frame memory 104 a few mm before the end position of the original document. The microcomputer in the IPU 103 uses the end portion of the original document as the start position of the effective image area in the main scanning direction and the sub scanning direction.
Image data output from 04 is instructed.

FIG. 66 shows the upper edge detection data of the spread book document BO by the reading sensor 101. When the spread book document size is B4 size, the upper end portion of the book document detected by the reading sensor 101 is at a position of about 270 mm from the front set reference position in the main scanning direction position. The reading sensor 101 starts detection in the front direction from the original frame outer frame position at the page suction / elevation position when the page turning scanning is stopped after the image reading scan, first reads the black original plate outer frame, and then Scan the black platen. Reading sensor 10
In this document, 1 reads the inside of the right cover, then reads the background density which is the margin of the top page, and generally reads the image after a margin of ten and several millimeters. The microcomputer in the IPU 103 compares the continuous data from the reading sensor 101 in the main scanning direction with a threshold value, detects the beginning of the margin portion of the uppermost page, and sets the position as the upper end portion of the page.

The end portion in the main scanning direction detecting circuit shown in FIG. 61 detects the end portion in the main scanning direction of the original by the change in the read data of one line of the main scanning by the reading sensor 101. Figure 6
As shown in FIG. 2, the two-page spread original document BO is set and fixed on the main document table 1 with the left end of the binding portion and the front as a reference.
Since the main document placement reference is on the front side of the main document table 1 and the main scanning one line of the reading sensor 101 is read from the back side of the main document table 1, data in the main scanning direction from the reading sensor 101 is read. Are rearranged in the 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 the microcomputer in the IPU 103. The data from the digital comparator circuit 408 is 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 data DATA from the read sensor 101 has a value 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.
Pixels in the main scanning direction are counted by counting the clock CLOCK input through the AND circuit 4.
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 for detecting the end portion of the main document in the main scanning direction, the reading sensor 101 performs the front direction from the black main document table 1 on the back side or the outer frame portion thereof, and the same as the above-described case of the main document BO. Occurrence of page background is detected. In the detection of the end portion of the main document in the main scanning direction, the microcomputer in the IPU 103 does not control the scanning of the scanning unit 200, so that the processing time is long and the scanning unit 20 for adsorbing the page is detected.
This is performed when the scanning of 0 is stopped, and the microcomputer in the IPU 103 causes the data latch circuit 408 and the D flip-flop circuits 410 and 411 to detect the end portion of the main scanning direction of the original.
Also, the reset signal RESET to the counter 413 is released.

In this system, the page edge of the original document is detected by the hardware circuit as shown in FIGS. 60 and 61. By detecting the page edge of the original document, it is possible to detect the page edge of the original document with a high degree of freedom with an inexpensive system.

The microcomputer in the IPU 103 uses the detection signal at the end of the main document in the main scanning direction to determine the effective image range in the main scanning direction of the main document having a relatively large irregular size. The outside image is automatically erased to prevent useless black solid images. When applied to a file system or the like, the image data is reduced by the detection signal at the end portion of the main document in the main scanning direction to save the memory amount.

Next, the detection of the trailing edge of the original document in the sub-scanning direction by the page storage sensor will be described. When detecting the end portion of the page of the original document after the first page turning, the end position of the top page of the two-page spread original document is accurately and stably calculated by using the transmissive page storage sensor 415 in the page turning path. In this apparatus, since the cover of the original is fixed to the original table 1, the deviation of the original during scanning is small. Further, this document has a tendency that the displacement of the position due to turning one page is extremely small.

This apparatus uses a transmissive page storage sensor 415 for page detection as shown in FIG. The transmissive page storage sensor 415 includes a light emitting diode 415a as a light emitting element on the upper page conveyance guide 416, and a photodiode 415b as a light receiving element below the lower page conveyance guide 417.
It is configured to include. Holes 416a and 417 are formed in the page conveyance guides 416 and 417 forming the page conveyance path 418.
a 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 conveying unit, so that the paper dust generated by storing the turned pages of the document is detected by the page storage sensor 415. The structure is such that it does not accumulate at the page-turning detection position and falls downward.
The page storage sensor 415 detects the page turning of the original document conveyed through the page conveyance guides 416 and 417 after separating one page, and the detection accuracy is extremely high within 1 mm regardless of the original selected. The page storage sensor 415 is also used as a sensor for detecting a jam of unstored and undischarged pages when turning a page.

The scanning unit 200 shown in FIG. 27 scans the spread book document BO and then scans it in the left direction to turn the book document BO. The turning page locus when turning pages of this manuscript is almost constant and mechanically determined. The uppermost right page end of the original document BO is attracted to the page-turning belt 208, the scanning of the scanning unit 200 is temporarily stopped, and the page-turning belt 208 is lifted to guide the page-turning page toward the page conveying path. The scanning unit 200 is further scanned in the left direction, the page to be turned is stored in the page conveying path, and the leading edge of the page goes out of the scanning unit 200. The locus of the flipping page rises and is almost constant along the flipping belt 200, and is determined by its mechanical layout. Page storage sensor 4
A turning page 15 is arranged in the vicinity of the entrance of the turning page storage portion formed by the page feeding path and detects the turning page of the original document.

The page storage sensor 415 detects a turning page storage start detection timing, that is, the scanning unit 200 at the turning page storage detection position of the turning page storage section.
From the position of, the right edge position of the turning page when the turning page is on the original is calculated. Therefore, the page storage sensor 415 detects the page edge of the page after separating one page of the page original, so that the page edge position of the two-page spread original in the turning start direction (right side in this apparatus) is accurate. After being detected reliably, the microcomputer in the IPU 103 detects the output signal of the page storage sensor 415 (page storage start detection timing) from the trailing edge of the image effective range of the original document and the next page turning position (the original page is 1 page). (Since the displacement of the position due to the page turning is extremely small), it 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 the right end of the page of the original and lifts the page is about 20 mm. When the detection timing of storing the original page in the turning page storage section is earlier than the target timing, the suction width is larger than the target 20 mm. The suction and rise timings of 208 are displaced in the early direction. For example, the microcomputer in the IPU 103 estimates the suction width to be 22 mm when the timing of detecting the original page turning page storage in the turning page storage section is 2 mm ahead of the distance, and scans the next page suction position by the turning belt 208 by 2 mm. The address of the unit 200 is changed to the right side.

On the other hand, the microcomputer in the IPU 103 turns the turning belt 2 when the original document turning page storage detection timing of the turning page storage section is later than the target timing.
Since the suction width of 08 is smaller than the target of 20 mm, the page-turning belt 208 of the page end portion in the turning-start direction of the double-page spread original document
The suction and rise timings due to are displaced in the slower direction.
As a result, the page suction width is controlled to a constant value, and it is possible to prevent a failure of turning over, turning mistakes of turning a large number of sheets, and damage to the original document, and a stable repeated operation is performed.

Next, the detection of the leading edge of the main document in the sub-scanning direction by the page storage sensor will be described. When the scanning unit 200 is further scanned in the left direction after the turning pages are stored in the turning pages storage section, the two-page spread original document has the turning pages constrained by the central binding section, so that the turning pages are pulled by the binding sections. The paper is discharged in a U-shaped path from the page-turning conveyance path. The trail of ejecting the page-turning is always substantially constant along the page-turning path and the pressing roller 281a. IPU1
The microcomputer in the reference numeral 03 indicates a turning page from the position of the scanning unit 200 at the timing of detecting the start of discharging the original page turning page in the turning page storage section by the page storage sensor 415, that is, the position of the scanning unit 200 at the timing of detecting the starting turning page discharge start of the turning page storage section. Calculates the position of the right end which should be on the upper left of the original from the output signal of the page storage sensor 415. Therefore, the page end position of the two-page spread original in the turning start direction (on the left side of the apparatus) is accurately and surely detected by turning one page of the original and separating the page, and detecting the page end.
The microcomputer in U103 calculates the leading edge of the effective image area of the original document from the position of the page edge portion in the turning start direction of the two-page spread original document, and uses it for the next reading registration.

The microcomputer in the IPU 103 uses the detected start position address A and end position address B of the effective image range between the right end portion and the left end portion of the original document.
As a result, the center position becomes the binding portion of the double-page spread of the original document, so the center binding portion address C is calculated as follows. C = (A + B) / 2 Thus, the reference position for page allocation when copying the double-page spread original document image read at one time can be obtained. Further, since the image of the central binding portion of the two-page spread original document is likely to be shaded or distorted,
The microcomputer in U103 surely erases the image at that position. Further, the microcomputer in the IPU 103 performs the right page registration at the time of page independent output by using the calculated center binding portion address C.

As described above, the displacement of the uppermost double-page spread position due to repeated page-turning of the double-page spread original document is extremely small when turning one page. Further, the positional deviation of the position of the top spread page due to repeated turning of 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 by repeating the page-turning scanning a plurality of times, for example, once for every page-turning operation of 10 pages, and updating the position data to obtain the original document. The calculation processing and time for the page edge are reduced.

Next, the input of the end portion of the original document (page turning position) will be described. As described above, in the first page turning, the right edge portion of the two-page spread original document is detected based on the read data in the image reading method. However, there are rare cases where the page edge portion of a book document such as a gravure book is not detected or is erroneously detected. It is performed without turning the page into the turning page conveyance path during the turning page, and as a cause thereof, the page turning position is defective, specifically, the page suction width is too small, or the page sticks out of the suction belt 208. Some cannot be raised, and some cannot pick up pages depending on the paper type of this document. In the former case, if the page suction width is set correctly, the page is surely turned.

As shown in FIG. 64, this apparatus is provided with a scale 419 for inputting the right page edge portion on the exterior portion on the right front side of the document table 1. The scale 419 is provided in parallel with the sub-scanning direction and is graduated at equal intervals. If the device is stopped due to page turning for the first time, "
A guide display "Page Migihashi no Scale" is displayed, and the operator opens the scanner unit and reads the value at the right end of the page on the scale 419 at the right end of the page.
Input with the ten keys of the operation unit 99. In the example of FIG. 64,
Enter the scale value "12" at the right edge of the top page,
Then, the enter key of the operation unit 99 is used to make a confirmation input. After that, by pressing the print key of the operation unit 99, I
Similarly, the microcomputer in the PU 103 starts the reading scan, and this time, the page suction / raising position is calculated from the input position information at the right end of the page, and the turning belt 208 sucks / raises the glue at this position. as a result,
The page turning is started with an appropriate suction width regardless of the type of page image of the original document. After that, IPU1 is the second and subsequent page turn.
In the same way as described above, the microcomputer in 03 controls the page storage sensor 415 at the timing calculated by the page right end detection position.

Next, the page turning position input method will be described. In this example, the scale 41 is used to input the end position of the document.
I tried to input the numerical value of 9 with the numeric keypad, but other first
In the above example, a slide volume for aligning the end portion of the original document is provided at the same position as the scale 419 for inputting the end portion of the right page of the exterior portion on the right front side of the document table 1, and the resistance value or the converted voltage value is stored in the IPU 103. I read it with a microcomputer.

In another second example, the scanning unit 2
00, a sensor is provided, and a shield plate detected by the sensor is provided laterally slidable at the same position as the scale 419 for inputting the right page end portion on the exterior portion on the right front side of the document table 1. The shield plate is aligned with the position of the end portion of the original document, and is detected by the sensor during scanning of the scanning unit 200 to be the timing of page suction rise. In this case, the position of the sensor and the shield plate may be reversed and the sensor may be slidable.

In another third example, the read sensor 101
Data is used. The reading sensor 101 performs reading from the front side in the main scanning direction, and an optical system is arranged so that the projection position of the reading pixel in the main scanning direction to the start position is on the front side exterior portion of the document table 1. Scale 41
9, a white mark member that has a clear contrast with the black color of the exterior portion and is slidable is arranged at the same position as 9, 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 the mark detection circuit similar to the document edge detection circuit shown in FIG. 60 from the data from FIG. 60, and the microcomputer in the IPU 103 uses the data from the mark detection circuit to determine the timing (position) of page suction and ascent. The page suction position is calculated and controlled.

The main document sub-scanning direction end detection circuit and the main document main scanning direction end detection circuit are arranged in the IPU 103 to sample the pixel data before the image scaling processing in the main scanning direction to detect the sub-copy of the main document. The end in the scanning direction and the end in the main scanning direction are detected, and the start and end of the detection are instructed by the microcomputer in the IPU 103. The end of the main document in the sub-scanning direction detected by the end detection circuit of the main document is managed by the scanning position of the scanning unit 200 by the microcomputer in the IPU 103, and the microcomputer in the IPU 103 counts the pixels in the main scanning direction. The counter controls the main document main scanning direction end detected by the main document main scanning direction end detection circuit. And IP
The microcomputer in U103 calculates the page suction position and the effective image range in the main scanning direction by the end portion of the main document in the sub-scanning direction and the end portion of the main document in the main scanning direction.

Next, the operation of this system will be described. TPS operation mode (1) Reading mode (a) Main document reading When the sub first mirror 222 is released, the lower fluorescent lamp 201,
202 is turned on, the carriage 200 is scanned rightward after the shading correction at the left home position, the two-page spread original document is read at once, and the image data thereof is stored in the frame memory 104.

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

(2) Return mode (a) Page turning In the original reading mode, the high voltage bias is applied to the high voltage power source 1.
16 is applied to the turning belt 208, and the carriage 2
00 is scanned in the left direction and the turning roller 208 stops at the time when it reaches the right end of the two-page spread document, and the turning roller 2
08 increased to 0.5 sec. The carriage 200 is then scanned leftward. The edge detection circuit detects the right edge and the left edge of the two-page spread original from the image data from the VPU 102, and the microcomputer in the IPU 103 calculates the page suction position and the image effective range of the read image in the main scanning direction from them. .

(B) Unit 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 to the central home position, and the document table 1 is raised and then lowered by a certain amount and retracted from the carriage 200.

(4) Pre-scanning mode The carriage 200 is scanned to the left home position to prepare for shading correction and reading. (5) Post-scan mode After the return operation of the carriage 200 ends, the carriage 200
Is scanned and set to the central home position, and the document table 1 is raised and then lowered by a certain amount and retracted from the carriage 200.

Next, the basic operation of TPS will be described in detail. (1) Main document reading mode (a) The main document reading mode is designated by pressing the BOOK key on the operation unit 99. (B) When the print key of the operation unit 99 is pressed, the document table 1 is raised, and the document is abutted and fixed on the carriage 200.

(C) The sub first mirror 222 is released,
The lower fluorescent lamps 201 and 202 are turned on. (D) The carriage 200 is scanned leftward, and after reaching 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 document, and the image-processed data is stored in the frame memory 104.

(F) After the carriage 200 has been scanned to the far right, the charging of the turning belt 208 is started,
The carriage 200 is scanned leftward. (G) The carriage 200 is scanned in the left direction to read the image of the original document, and the microcomputer in the IPU 103 detects the right end portion of the original document from the density difference between the document table 1 and the original document page based on the image data from the VPU 102. . (H) The microcomputer in the IPU 103 temporarily stops the carriage 200 when the turning belt 208 reaches the detected right end portion of the original document, then raises the turning belt 200, and after a certain period of time, moves the carriage 200 leftward. To scan.

(I) The microcomputer in the IPU 103 calculates the effective image range of the main document in the main scanning direction from the upper end of the page of the main document detected by the end detection circuit of the main document in the main scanning direction when the carriage 200 is temporarily stopped. To calculate the automatic erase position in the vertical direction, and then
01 and 202 are turned off. (J) The microcomputer in the IPU 103 scans the carriage 200 in the left direction after a predetermined time elapses after the page suction of the turning belt 200 rises. (K) The page storage sensor 415 detects the page stored in the page-turning path, the microcomputer in the IPU 103 accurately calculates the position of the right end of the page from the page-storage start detection timing, and the page is turned over. Detect.

(L) At the point where the carriage 200 reaches the central position, the left and right upper and lower sides of the left and right book manuscript tables 1 and the left and right fixations of the right book manuscript table 1 are temporarily released to determine the book spread shape. (M) When the turning belt 208 reaches the central point of this document, the charging of the turning belt 208 is stopped. (N) The carriage 200 is scanned in the left direction, the page storage sensor 415 detects the discharge of the page stored in the page-turning conveyance path, and the microcomputer in the IPU 103 detects the position of the left end of the page from the page discharge start detection timing. Is calculated accurately, and the center position of the spread book document and the length of the spread page are calculated from the calculated left and right edge positions.

(O) After completion of the calculation, the microcomputer in the IPU 103 designates the address of the frame memory 104 by the left and right end portions of the page, the image output form, and the erase position, and the frame memory 104 is designated by the synchronizing signal from the printer. The image data is read from the designated address of 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 to the right, the image of the two-page spread original document is read, and the image-processed data is stored in the frame memory 104. (R) The lower fluorescent lamp 20 has been read up to the right end of this document.
1, 202 is turned off, and immediately after the end of data storage in the frame memory 104, the microcomputer in the IPU 103 specifies the address of the frame memory 104 according to the positions of the left and right edges of the page and the image output form detected and the erase position, Image data is read from a designated address of the frame memory 104 by a synchronization signal from the printer and transferred to the printer.

(S) Below, during continuous operation, (f),
(H), (j) to (n) page turning, and (p) to (r) reading are repeated. It should be noted that after the second time, (g), (i) edge image detection, and (o) printout after page turning is not performed. (T) For the end of the continuous operation, after the carriage 200 of (p) reaches the left home position, the carriage 200 is scanned rightward and stopped at the center home position.

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

(B) When the print key is pressed, the document table 1 is lowered and the document table 1 is retracted from the carriage. (C) The sub first mirror 222 is inserted, and the upper fluorescent lamp 2
03 and 204 are turned on. (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 the sheet original, 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 scaling factor, the upper fluorescent lamps 203 and 204 are turned off and the carriage 200 is scanned leftward.
(G) Immediately after the data has been stored in the frame memory 104, the data is read from the designated address of the frame memory 104 by the synchronizing signal from the printer and transferred.

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

Next, the selection of the image reference will be described.
67 and 68 show a part of the operation unit 99 of this apparatus.
The operation unit 99 has an operation button 601 for switching and designating a sheet original reading mode and a book original (main original) reading mode. In the main original reading mode, the following modes are effective. The operation unit 99 is provided with an image reference designation key 602 for designating an image reference mode at the time of copying this document, and light emitting diodes 603, 604 for displaying the state. The image reference position includes the center of the sheet (transfer sheet), the left edge of the sheet, and the right edge of the sheet. When the image reference designation key 602 is pressed, the image reference mode is sequentially changed to the center, left edge, and right edge of the transfer sheet. Upon switching, the light emitting diode 603 lights in the image reference mode in which the image reference position is the left end of the paper, and the light emitting diode 604 lights in the image reference mode in which the image reference position is the right end of the paper. The basic image reference mode in which the image reference position is the center of the paper is not displayed.

At the time of default such as power-on, mode clear, main document reading mode selection, etc., the basic image reference mode in which the image reference position is the center of the sheet is preferentially selected by the main control board 107. This prevents image loss when an image reference mode other than the basic image reference mode is preferentially selected and an error in transfer paper size detection or a registration (position) deviation of the image formation itself occurs. At the same time, the image position shift amount is made inconspicuous without forming an image on the edge of the transfer paper. Further, when the double-sided copy mode in which images are formed on both sides of the transfer paper is selected, the image reference mode in which the image reference position is the left end or the right end of the paper is preferentially selected by the main control board 107, and is standardized on the transfer paper. Create margins for binding.

The operation unit 99 also includes movement amount setting keys 605 and 606 for setting the amount of movement of the image position from the image reference position at the time of copying the original document, and light emitting diodes 607 and 608 for displaying the state. . There are left reference shift and right reference shift to set the image movement amount, and the image movement amount setting is effective only when the image reference mode is the image reference mode in which the image reference position is the left edge or right edge of the paper. Is formed on the transfer paper by shifting from the image reference position. The amount of image movement can be adjusted from 0 to 20 mm by 1 mm by inputting ten keys and enter key on the operation unit 99.
It can be set in units, and the default image movement amount is 0.
mm.

Further, the operation section 99 selects an operation button 609 for selecting whether to copy an independent page or a spread page of the original document.
And light emitting diodes 610 and 611 for displaying the state
Each time the operation button 609 is pressed, the main control plate 107 alternately selects and sets a mode for copying an independent page of the original document and a mode for copying a double-page spread. The operation unit 99 also includes an operation button 612 for selectively designating the original double-sided copy mode, double-page spread double-sided copy mode, and automatic double-sided copy mode, and the light emitting diode 61 for displaying the state.
3,614,615.

The main control board 107 is shown in FIGS. 91 and 92.
In the mode for copying an independent page of the original document as shown in, the double-sided key counter is set to 1 when the power is turned on, and each time the operation button (double-sided key) 612 is pressed, the original (one sheet of the original document) is double-sided copied. The double-sided key counter is incremented. When the double-sided key counter reaches 5 or more, 1 is set in the double-sided key counter. When the double-sided key counter is 1, the main control board 107 sets the single-sided copy mode to set the light emitting diodes 613, 614, 615.
Is turned off, and when the double-sided key counter is 2, the original double-sided copy mode is set and the light emitting diode 613 is turned on. When the double-sided key counter is 3, the main control board 107 sets the double-page spread double-sided copy mode for double-sided copy of the double-page spread and turns on the light emitting diode 614, so that the images of the double-page spread are separated. A warning is displayed on the display of the operation unit 99. Further, the main control board 107 automatically sets the original double-sided copy mode and the double-page spread double-sided copy mode so that the images of each page of the original are formed from the front side of the first sheet when the double-sided key counter is 4. Set the automatic double-sided copy mode (double-sided page-by-side copy mode) to switch between two-sided copies, and operate the warning display that the two-page spread images are separated when the copy start page of this document is the left page. The display of the section 99 is operated. The operation unit 99 also has operation buttons 616 and 617 for selecting whether to copy the original document from the left page or the right page,
The main control plate 107 selectively sets a mode in which the main document is copied from the left page and a mode in which the main document is copied from the right page in response to depression of the operation buttons 616 and 617. Further, the operation section 99 has operation buttons 618 and 619 for designating a mode for setting the number of copied pages of the main document, and a ten-key pad for inputting the number of copied pages of the main document.

Next, the original document image standard will be described.
FIG. 69 shows the page image range of the read spread book document, and FIGS. 70 to 73 show the layout of page images in each book document image reference mode. FIG. 69 shows an example in which the vicinity of the center of a main document having an A4 size cover and a main thickness of about 30 mm is opened. The page length in the plane direction from the page edge portion to the central binding portion of this document is reduced to about 200 mm. Generally, the pages of a two-page spread original document do not have a standard size even if the paper is of a standard size because the image is shrunk by the binding portion. The amount of image shrinkage varies depending on the thickness of the original document and the binding method thereof. Further, many of the originals have papers of a size other than the standard size. further,
There is a case where the original is out of the standard size by cutting the end portion after binding.

70 (a) to 70 (c) show sheet images in the two-page spread original copy mode. The image reference positions in the two-page spread original copy mode are the left edge of the sheet, the center of the sheet, and the right edge of the sheet. When the image reference position is at the left end of the sheet as shown in FIG. 70 (a), the page end position in the scanning start direction of the two-page spread original document is detected as described above, and the microcomputer of the IPU 103 detects the detected page. By operating the read address of the frame memory 104 from the left end position and the length information of the transfer paper fed by the laser printer (transfer paper length information from the transfer paper size detecting means), the transfer paper front end in the transport direction. The images of both spread pages of this document are formed on one sheet of transfer paper in alignment with each other, and the images of both spread pages are left-justified on the transfer paper, as in a conventional scale-based copying machine.

When the image reference position is at the center of the sheet as shown in FIG. 70B, both page end positions in the scanning start direction and the scanning end direction of the two-page spread original document are detected as described above, and the IP
U103 length information in the scanning direction of the two-page spread original document calculated by the microcomputer of the U103 (transfer sheet length information from the transfer sheet size detection means) and length information of the transfer sheet fed by the laser printer. To frame memory 1
By operating the read address 04, the two-page spread image of the original document is formed at the center of the transfer paper. Therefore, a uniform margin can be formed on the left and right of the transfer paper due to the shrinkage of the original.

As shown in FIG. 70 (c), when the image reference position is at the right end of the paper, the page end position of the two-page spread original in the scanning end direction is detected as described above, and the microcomputer of the IPU 103 detects it. The right end of the page is operated by operating the read address of the frame memory 104 from the page edge position and the length information of the transfer sheet fed by the laser printer (transfer sheet length information from the transfer sheet size detecting means). The detection position is aligned with the rear end position of the transfer sheet in the conveying direction, and both spread pages of the original are formed on one transfer sheet. As a result, the images of both double-page spreads are formed right-justified on the transfer paper, a margin is formed on the left side of the transfer paper due to the contraction of the document, and a binding margin when the transfer paper after copying is left-binding is possible.

71 (a) to 71 (d) show sheet images in the independent page copy mode. The image reference positions in the independent page copy mode for copying the image of each page of the original document onto the transfer paper are the left end of the paper, the center of the paper, the right end of the paper, both ends of the page, and the center of the page. However, in this apparatus, the designation means at both ends of the page and the center of the page are not shown. When the image reference position is at the left edge of the sheet as shown in FIG. 71A, the page edge positions of the left and right pages of the two-page spread original document are detected as described above, the center binding position is calculated, and the IPU 103 Of the frame memory 10 from the position of the page end portion of the left page and the position of the central binding portion.
By operating the read address of No. 4, the position of the page end of the left page in the scanning start direction of the two-page spread original is aligned with the position of the leading end of the first transfer sheet in the transport direction, and the position of the central binding portion is set to the second position.
The two-page spreads of the original document are formed on independent transfer papers in line with the leading end position of the transfer paper in the transport direction. Also,
The images of the respective pages are formed on the respective transfer sheets in the left-justified manner as in the conventional scale-based copying machine.

When the image reference position is the paper center reference as shown in FIG. 71 (b), the page edge positions of the left and right pages of the two-page spread original document are detected and the center binding position is set as described above. The microcomputer of the IPU 103 calculates a frame memory from the page edge position and the center binding position and the length information of the transfer paper fed by the laser printer (transfer paper length information from the transfer paper size detecting means). By manipulating the read address of 104, the page end position and the center binding position of the left page in the scanning start direction of the two-page spread original are set to the first position.
The center binding position and the page edge position of the right page are aligned with both ends of the (first sheet) transfer paper, and are aligned with both ends of the second (second sheet) transfer paper. A page is formed in the center of each independent transfer paper. Therefore, a uniform margin can be formed on the left and right sides of the transfer sheet due to the contraction of the document.

As shown in FIG. 71 (c), when the image reference position is the right end reference of the paper, the page end positions of the left page and right page of the two-page spread original document are detected as described above, and the center binding part position is changed. The microcomputer of the IPU 103 calculates and calculates the page end position of the right page, the center binding position, and the length information of the transfer paper fed by the laser printer (transfer paper length information from the transfer paper size detecting means). By manipulating the read address of the frame memory 104, the position of the central binding portion of the two-page spread original in the scanning start direction is aligned with the trailing edge of the first (first) transfer sheet, and the page edge position of the right page. Is the second (2nd)
The image of each page is formed right-justified on the transfer paper in line with the rear end position of the transfer paper in the transport direction. As a result, a blank space is formed on the left side of the transfer paper due to the contraction of the original, and a binding margin is created when the copied transfer paper is left-bound or bound.

As shown in FIG. 71 (d), when the image reference positions are at the both ends of the page, copying is performed by switching the image reference positions on the left and right pages to the left end and right end of the paper by switching as in the above case. Both double-page spreads of the original document are formed on both end sides of the independent transfer paper, and a margin is formed on the central side of the transfer paper due to the contraction of the original document. When the image reference position is at the center of the page as shown in FIG. 71 (e), copying is performed by switching the image reference positions on the right and left sides of the sheet on the right and left sides of the read page in the same manner as in the above case. The two-page spreads of the original are formed on the center side of the independent transfer paper, and margins are formed on both ends of the transfer paper due to the contraction of the original.

72 (a) to 72 (d) show sheet images in the double-page spread double-sided copy mode. The image reference in the double-sided double-sided copy mode is paper front / right edge / paper back / left edge, and paper center. As shown in FIG. 72A, when the image reference is the sheet front / right edge / back of the sheet / left edge, the microcomputer of the IPU 103 causes the page length of the original document in the scanning direction and the transfer sheet length information (transfer sheet size detection means). By manipulating the read address of the frame memory 104 based on the transfer paper length information), the image reference position on the front surface of the transfer paper is set as the trailing edge of the paper in the scanning direction, and the image reference position on the back surface of the transfer paper is set. Images are formed on both sides of the transfer sheet as the leading edge of the sheet in the scanning direction, and the images on the front and back sides of the transfer sheet are offset to one side, and the binding margin when binding the transfer sheet for double-sided image formation can be achieved by the page image shrinkage.

When the image reference is the sheet center reference as shown in FIG. 72 (b), the transfer sheet is the same as the image reference position in the two-page spread mode as shown in FIG. 70 (b). An image is formed on the front and back of the. Fig. 73 (a)-
(C) shows a paper image in the independent page double-sided copy mode. The image reference in the independent page double-sided copy mode includes paper front / right edge / paper back / left edge and paper center. If the image reference is the front / right edge of the paper / back of the paper / left edge reference, A. When the image is formed on the front and back of the transfer paper in the same manner as the original, B. In some cases, an image may be formed on the front and back of the transfer paper, which is the reverse of the original.

In the former A, as shown in FIG. 73 (a), the microcomputer of the IPU 103 has the right end of the page and the left end of the left page and the transfer paper length information (transfer paper size detecting means) of this document as shown in FIG. By operating the read address of the frame memory 104 based on the transfer paper length information from the transfer paper, etc., the right end of the page of the double-page spread right page of this document is aligned with the rear end position of the transfer paper, and the image on the right page is transferred. Is formed on the front side of the original, the left end of the page of the left-side spread of this document is aligned with the front end position of the transfer paper, and the image of the left page is formed on the back surface of the transfer paper.
The images on both sides of the transfer paper are formed at the same position as the original with reference to both end portions of the page.

In the latter B, as shown in FIG. 73B, the microcomputer of the IPU 103 sets the frame based on the center binding portion of the original document and the transfer sheet length information (transfer sheet length information from the transfer sheet size detecting means). By operating the read address of the memory 104, an image is formed on the surface of the transfer sheet by aligning the central binding portion of the original document with the rear end position of the transfer sheet, and the central binding portion of the original document is positioned at the leading edge position of the transfer sheet. And an image is formed on the back surface of the transfer paper. As a result, images of double-page spreads of the original document are formed on the front and back sides of the transfer paper. In this case, the transfer sheet can have a large binding margin width based on the binding portion.

When the image reference is the sheet center reference as shown in FIG. 73 (c), the transfer sheet is the same as in the case where the image reference position is the sheet center in the independent page copy mode as shown in FIG. 71 (b). An image is formed on the front and back of the. In this apparatus, when the set image reference position is the edge (leading edge or trailing edge) of the transfer paper, that is, the left edge of the paper, the right edge of the paper, the image reference is the front / right edge of the paper / back of the paper / left edge. Same as the original, the standard mode is to form images on the front and back of the transfer paper, and the image reference position when forming images on the front and back of the transfer paper is switched to the trailing edge and the leading edge of the transfer paper in the scanning direction. Images are formed on both sides of the paper.

Next, the original document operation timing will be described. FIG. 74 shows the copy operation timing in the main document copy mode of this apparatus. In this main document copy mode, the end portion of the main document is detected by the image in the initial mode from the press of the print key. The page size of this manuscript in each mode is A4
The scanning unit 20 has a size of 2 pages and a 2-page spread of this document.
0 is continuously read by one scan, and the read data of A3 size is stored in the frame memory 104,
Data is read from the frame memory 1104 according to each copy mode, imaged by a laser printer, and recorded on transfer paper.

FIG. 74 shows the copy operation timing in the 1TO1 copy mode in which a two-page spread A3 size main document image is copied onto an A3 size transfer sheet and one copy is made of the main document.

At the copy operation timing in the 1TO1 copy mode, the microcomputer in the IPU 103 scans the scanning unit 200 when the print key instructing the start of copying is turned on.
6 is driven in the reverse direction via the motor drive circuit 503,
The scanning unit 200 at the center is moved in the reading start direction. When the scanning unit 200 moves to the reading start position of the left home position, the microcomputer in the IPU 103 drives the scanner motor 106 in the normal rotation direction to turn on the fluorescent lamps 201 and 202 to start the reading scanning of the original document BO. Let

The microcomputer in the IPU 103 processes the image data from the VPU 102 as an original image from the left page end point of the two-page spread original and generates an effective image area signal SFGATE in the reading sub-scanning direction. Then, the microcomputer in the IPU 103 uses the effective image area signal SFGATE to transmit the frame memory 104.
The data write signal memory W is operated to control the data write range. Further, the microcomputer in the IPU 103 recognizes the center point of the double-page spread original binding part from the control address of the scanner motor 106, and reads the read image in the reference position of the second image in the independent page copy mode or in the double-page output mode. It is used when it is formed in the center of the transfer paper.

When the scanning unit 200 reaches the right page edge of the double-page original document, the microcomputer in the IPU 103 detects the right page edge of the original document by detecting the page storage sensor 415.
Starting from the output signal of, the page suction position at the time of page turning is calculated from the detected right page edge portion. Scanning unit 200
When the reading scan is completed, the page turning scan for the backward movement is started, and as described above, the microcomputer in the IPU 103 first determines the effective image range according to the page storage position from the output signal of the page storage sensor 415 as described above. The image data of the image effective range is read from 104 and sent to the printer to start image formation.

That is, the microcomputer in the IPU 103 determines, based on the output signal of the page storage sensor 415, from the scanning position of the scanning unit 200 at the time when the storage detection of the page is started, from the turning page storage shape of the apparatus to the turning page on the original document. The right end position of is calculated. Then, the microcomputer in the IPU 103 determines, based on the output signal of the page storage sensor 415, from the scanning position of the scanning unit 200 at the time of detecting the discharge of the turning page, from the turning page discharging shape of the apparatus to the left end position of the turning page on the original document. To calculate.

In addition, the microcomputer in the IPU 103, after the second time, within the image effective range calculated by the page storage position detected based on the output signal of the page storage sensor 415 the previous time, reads the frame memory 10 immediately after the end of scanning.
The image data is read from 4 and sent to the printer to cause the printer to start image formation. The microcomputer in the IPU 103 uses the effective image area signal PFGATE in the sub-scanning direction on the printer side to send the frame memory 104.
The data read signal memory R is operated to read the image data in the image effective range from the frame memory 104 in synchronization with the printer and send it to the printer to form an image. Further, when the page is turned, the page storage sensor 415 repeatedly detects the page edge of the two-page spread original. By repeating the above steps, the double-page spread is copied while automatically turning the pages of the original.

This apparatus carries out a stable page turning operation against the page suction and separation method by the displacement of the suction roller of the original.
In this method, only the leading end of the page is sucked and displaced upward and guided to the page storage portion, so the suction position is important. As described above, the page edge portion of the original document is detected, the operation position of suction and separation with respect to the edge portion of the original document that changes due to repeated page turning is determined, and control is performed so that the designated width of the page is absorbed and separated.

Next, the image range of the original document will be described. The reading sub-scanning direction range of the original document image and the arrangement method thereof will be described with reference to the time charts of FIGS. 75 to 78. 75 to 78, the reading range and the image forming range in the sub-scanning direction are indicated by the number of scanning lines, and the image position thereof is indicated.

As described above, this apparatus reads both pages of a two-page spread original in one scan, stores the image data in the frame memory 104, then reads the image data from the frame memory 104, and the printer prints the image. Form. In this apparatus, the range in which the read image data in the sub-scanning direction is stored in the frame memory 104 (determined by SFGATE) is about 455 mm from the capacity of the frame memory 104 for the maximum allowable size A3 of this document of 420 mm, which is 7 mm.
There are 174 lines. Normally, since the page position of the two-page spread original document changes as described above, the range for accumulating the read image data in the sub-scanning direction of the apparatus in the frame memory 104 starts from the left end of the left original platen of the maximum size of the original document.

In the double-page spread copy mode of FIG. 75, the effective image range (determined by VFGATE) of the double-page spread of the cover size A4 is compared with the read image data storage range of the frame memory 104 according to the edge detection result of the double-page spread original. The positional relationship is as shown in the figure. The microcomputer in the IPU 103 spreads the VFGATE and, based on the detection result of the edge of the original document, shrinks the binding portion of the original document to A.
It is calculated as 6400 lines for 6614 lines of 3 sizes. PFGATE 1, 2 and 3 are examples of PFGATE indicating the image range of the transfer paper when the image data within the calculated effective range is read from the frame memory 104 and recorded on the transfer paper of A3 standard size by the printer. IP
The microcomputer in U103 is each PFGATE
The range is determined by the size of the transfer paper fed by the printer, and is 6614 lines for A3 size. The printer uses the rising edge of PFGATE as a trigger to turn on the registration clutch of the paper feed, and sends the transfer paper from the paper feeding device by the registration rollers to form an image so that the leading edge of the image at the rising edge of PFGATE and the leading edge of the transfer paper are aligned. . The microcomputer in the IPU 103 is a VFG
FH of white data is transmitted to the printer by using each image data outside the ATE range as a margin.

PFGATE1 is PFGATE in the mode in which the image reference position is the left end of the sheet, and IPU10
The microcomputer in 3 is a frame memory 104
From the printer to the printer so that the left end of the page of the original document is aligned with the front end of the transfer paper and a margin is formed at the rear end of the transfer paper. As the image layout in this case, the microcomputer in the IPU 103 determines that the page range (VFGATE) is 640 from the value of the counter that counts the number of image lines.
The image data after the end of 0 line is white.

PFGATE2 is a mode in which the image reference is the center of the sheet, and the microcomputer in the IPU 103 transfers the image data from the frame memory 104 to the printer so that the center of the page is aligned with the center of the transfer sheet and the front and rear edges of the transfer sheet. Send so that a uniform margin is created. In this case, as the image layout, the microcomputer in the IPU 103 calculates the difference 214 between the page range (VFGATE) 6400 lines and the transfer paper image range (PFGATE2) 6614 lines from the value of the counter that counts the number of image lines. VFGATE for half of the lines, 107 lines
It is provided as a blank area in front of the
A blank space is provided from the end point of line 0, and PFGATE2 ends at line 6614.

PFGATE3 is a mode in which the image reference is the right edge of the paper, and the microcomputer in the IPU 103 transfers the image data from the frame memory 104 to the printer so that the left edge of the page is aligned with the rear edge of the transfer sheet and the leading edge of the transfer sheet. Send so that margins are created. As the image layout,
The microcomputer in the IPU 103 determines the page range (VFGA) from the value of the counter that counts the number of image lines.
TE) 6400 lines and transfer paper image area (PFGA
VF of the difference 514 lines from the TE2) 6614 line
It is provided as a blank area before GATE.

FIG. 76 shows the image range in the independent page copy mode. As in the case of FIG. 75, the effective image range (VFGATE) of the double-page spread of the cover size A4 has the positional relationship as shown in the figure with respect to the read image data storage range of the frame memory 104 according to the edge detection result. The microcomputer in the IPU 103 opens the VFGATE and, based on the edge detection result of the original document, shrinks the binding portion of the original document to 6
Calculated as 400 lines, half of which is 3200
The position of the line and the center binding portion is calculated as the middle of the range of VFGATE.

In the IPU 103, in the case of the mode in which the image reference is the left edge of the paper, the spread left page image is arranged in the transfer paper image range {PFGATE1 (L)} of A4 size 3307 lines and the frame is set. The image data is sent from the memory 104 to the printer so that the left end portion of the left page is aligned with the front end of the transfer paper and a margin is formed at the rear end of the transfer paper. The image layout in this case is IPU
The microcomputer in 103 determines the page range (VFGATE) from the value of the counter that counts the number of image lines.
The image data after the end of 3200 lines, which is half of the above, is white. Further, the microcomputer in the IPU 103 is
The double-page spread right page image is arranged in the transfer paper image area {PFGATE1 (R)} of A4 size 3307 lines, and the image data is transferred from the frame memory 104 to the printer so that the central binding position of the original document is aligned with the leading end of the second transfer paper. The transfer paper is sent so that a blank space is similarly formed at the rear end of the transfer paper.

In the mode in which the image reference is the center of the paper, the microcomputer in the IPU 103 arranges the spread page images in the transfer paper image range {PFGATE2 (L), PFGATE2 (R)} of A4 size 3307 lines. Then, the image data is sent from the frame memory 104 to the printer so that the center of the page is aligned with the center of the transfer sheet and uniform margins are formed at the front and rear edges of the transfer sheet. As the image arrangement in this case, the microcomputer in the IPU 103 determines that the number of image lines is 3200 lines which is half of the page range (VFGATE) and 3307 lines of the transfer sheet image range (PFGATE2) from the value of the counter. 53 lines, which is half of the 107 lines of difference, are provided as a blank part before the page image, and the image data is sent from the frame memory 104 to the printer so that the PFGATE2 ends at 3307 lines with a blank part provided from the end point of 3200 lines.

In the mode in which the image reference is the right edge of the paper, the microcomputer in the IPU 103 arranges the spread left page image in the transfer paper image range {PFGATE3 (L)} of A4 size 3307 lines and sets the frame memory 1
The image data is sent from 04 to the printer so that the page binding portion is aligned with the rear end of the transfer paper and a margin is formed at the front end of the transfer paper. In this case, as the image arrangement, the microcomputer in the IPU 103 uses the value of the counter that counts the number of image lines to determine 3200 lines of the page range (VFGATE) and 3 of the image range {PFGATE3 (L)} of the transfer paper.
A 107-line difference from the 307-line is provided as a margin before the VFGATE, and thereafter the image data on the left page of the VFGATE is read. Also, the microcomputer in the IPU 103 displays the spread right page image in A4 size 330.
Arranged in the 7-line transfer paper image range {PFGATE3 (R)}, the image data from the frame memory 104 to the printer is aligned with the right page end position at the rear end of the second transfer paper and the same as the front end of the transfer paper. Send so that margins are created.

In the double-page spread double-sided copy mode shown in FIG. 77, the two-page spread image is arranged on both sides of the transfer paper as in the double-page spread copy mode shown in FIG. In this mode, when the image reference position is the edge of the sheet in the mode of forming images on both sides of the transfer sheet, the image reference position is formed by the front and back sides of the transfer sheet. Transfer papers for double-sided copying are often bound, filed, or bound depending on the application.
If the set image reference position of the transfer paper is the edge (front or rear edge) of the transfer paper, the image reference positions for forming images on the front surface and the back surface of the transfer paper are the rear end of the transfer paper in the scanning direction. The image is formed on both sides of the transfer paper by switching to the leading edge. When the image reference position is the edge of the sheet, the image range is arranged on the front and back sides of the transfer sheet by the PFGATE front and PFGATE back sides.
PFGATE3 and PFGA in double-page spread copy mode
By repeating TE1, the image data is sent from the frame memory 104 to the printer preferentially so that the margin of the transfer sheet is moved to one side (leading edge or trailing edge) to form a binding margin.

On the other hand, when the image reference position is set to the center of the paper, the microcomputer in the IPU 103 is set to the one shown in FIG.
The image data is sent from the frame memory 104 to the printer so that images are formed on both sides of the transfer paper and margins are formed at both ends of the transfer paper as in PFGATE2 in the double-page spread mode.

In the independent page double-sided copy mode of FIG. 78, FIG.
Similar to the 6 independent page copy mode, images are arranged on both sides of the transfer paper page by page. When the image reference position is the edge of the sheet in the mode of forming images on both sides of the transfer sheet, this apparatus forms the reference for each of the front and back sides of the transfer sheet. If the set image reference position is the edge (leading edge or trailing edge) of the transfer paper and the original double-sided or double-sided spread is copied, the IPU
The microcomputer in 103 switches the image reference position when forming an image on the front surface and the back surface of the transfer paper to the rear end and the front end of the transfer paper in the scanning direction, respectively, and forms an image on both surfaces of the transfer paper, that is, The image data is sent from the frame memory 104 to the printer so that the margin of the transfer sheet is moved to one side (front end or rear end) and the binding margin is formed preferentially.

When copying both sides of the original, IP
The microcomputer in U103 forms an image on the transfer paper on the front and back sides in the same manner as the original, and the frame memory 104
Image data from the printer to the printer with the image reference position as the page edge and the right page of this document is the image range of the front of the transfer paper {PFGATE
(R → front)}, the left page is the image range on the back of the transfer paper {PFG
ATE (L → back)}, and the image range is PFGATE3 (R) and PFGATE1 in FIG.
It corresponds to (L). When binding with this transfer paper,
It is possible to obtain a book having the same positional relationship from the book original as the page edge.

When copying the two-page spread of this document on the front and back sides of the transfer paper, the microcomputer in the IPU 103 transfers the image data from the frame memory 104 to the printer with the image reference position as the page binding portion and the left page as the transfer paper. The image range {PFGATE (L → front)} on the front side of the image is sent so that the right page is arranged in the image range {PFGATE (R → back)} on the back side of the transfer paper, and this image range is sent to PFGATE3 (L )
And PFGATE1 (R). On the other hand, when the image reference position is set to the center of the paper, the microcomputer in the IPU 103 causes the spread copy mode PFG of FIG.
Like ATE2, an image is formed on both sides of the transfer paper to form margins at both ends of the transfer paper.

As described above, the microcomputer in the IPU 103 controls the writing position of the transfer paper by the read address operation of the frame memory 104 in which the image data is once stored. Further, in all copy modes, the printer counts the timer triggered by the rising edge of each PFGATE, turns on the paper feed registration clutch, and forms an image by aligning the leading edge of the PFGATE signal with the leading edge of the transfer sheet. .

Next, the operation timing of the original document will be described.
84 to 89 show the copy operation timing in the main document mode of the present system. At the operation timing of FIG. 84, the edge detection by the image is performed in the initial mode from the pressing of the print key. At the operation timings of FIGS. 85 to 114, the end portion detection is performed by the page storage position in the middle of the continuous copy mode. The first reading operation and the image edge detection operation in FIGS. 85 to 89 are the same as those in FIG. 84. The numbers in the figure are the read page numbers of the original document, and pages 2 and 3 and pages 4 and 5 form the spread pages of the original. Further, R and L of the read signal memory R of the frame memory 104 indicate that the read image data is for the right page and the left page, respectively. The page size of the book document in each mode is A4 size, and the two-page spreads of the book document are continuously read by the scanning unit 200 in one scan, and the read data of A3 size is stored in the frame memory 104. Data is read from the frame memory 104 according to each copy mode, imaged by a printer, and recorded on transfer paper.

84 and 85 show the operation timing of the 1TO1 copy mode in which a read image of a double-page spread of the main document is output on an A3 size transfer sheet and one copy is made on the main document. FIG. 86 shows a 1TO1 copy mode in which independent pages copy mode outputs the read images of the left and right pages of the original document on A4 size transfer paper for each independent page on different transfer papers to make a copy of the original document. The operation timing of is shown. Figure 8
Similar to the case of FIG. 86, 7 is a two-sheet copy mode in which an independent page copy mode outputs a read image for each independent page of the original document, and the copy setting number is two and two copies are made on the original document. The operation timing is shown.

At the operation timing of the original mode shown in FIG. 84, when the print key instructing the start of copying is turned on, the microcomputer of the IPU 103 drives the scanner motor 106 for scanning the scanning unit 200 in the reverse direction. , The scanning unit 200 at the center is moved in the reading start direction. When the scanning unit 200 moves to the reading start position of the left home position,
The microcomputer of the IPU 103 drives the scanner motor 106 in the forward rotation direction to turn on the fluorescent lamps 201 and 202 and start scanning for reading.

The microcomputer of the IPU 103 is
Image data from the VPU 102 is spread and processed as an original image from the left page end point of the original, and an effective image area signal SFGATE in the reading sub-scanning direction is generated. IPU1
The microcomputer of 03, this area signal SFGA
The data write signal memory W of the frame memory 104 is operated by TE to control the data write range.
From the control address of the scanner motor 106, the microcomputer of the IPU 103 recognizes the center point of the double-page spread original document binding portion and transfers the read image to the second image reference position in the independent page copy mode or the double-page spread copy mode. Used when forming in the center.

When the scanning unit 200 reaches the right page edge of the two-page spread original document, the microcomputer of the IPU 103 starts detection of the right page edge of the original document and calculates the page suction position when turning the page. When the scanning unit 200 finishes the reading scanning, it starts the backward page-turning scanning, and the printer starts image formation for the first time after the image effective range is determined by the page storage position. Further, after the second time, the image formation by the printer is started immediately after the reading and scanning is completed within the effective image range calculated by the previously detected page storage position. The microcomputer of the IPU 103 uses the effective image area signal PFGATE in the sub-scanning direction on the printer side to detect the frame memory 10
The data read signal memory R of No. 4 is operated to output data in synchronization with the printer. Further, the page storage sensor 415 repeatedly detects the page edge of the two-page spread original when the page is turned. By repeating the above steps, the double-page spread of the original document is performed while automatically turning the pages of the original document.

In the 1TO1 copy mode for outputting the read image for each independent page shown in FIG. 86, the read mode operates at the same timing as in the case of FIG. 85, and the image output at the time of page turning is performed by the microcomputer of the IPU 103 by the printer. Two PFs according to the transfer paper that is continuously conveyed by
The GATE operates the data read signal memory R of the frame memory 104 to output the data for each page. I
The microcomputer of the PU 103 masks the address counter of the frame memory 104 with PFGATE to stop the image data of the right page linked to the first image of the left page of the original document by the second PFGATE signal and the transfer paper interval. To read.

The case of FIG. 87 is the two-copy mode in which the read image is output for each independent page. In the read mode, the operation is performed at the same timing as in the case of FIG. 85.
Of the microcomputer of P, according to the image output at the time of page turning to the transfer paper continuously conveyed by the printer, a plurality of P
The data read signal memory R of the frame memory 104 is operated by FGATE to output a plurality of pages of data. In this example, first, the image of the read left page is continuously output for two sheets, and then the image of the read left page is continuously output for two sheets. While the printer unit is outputting a plurality of images, the scanner unit finishes the page turning scanning, and the scanning unit 200 stops at the reading scanning start position and stands by for the next reading scanning.

At the operation timing of the main document double-sided mode shown in FIGS. 88 and 89, copying is performed on both sides of the transfer paper in the same configuration as the front and back sides of the page of the main document. In the case of FIG. 88, copying is performed in the order of read pages. In this case, the read image data of the right page of the double-page spread original is read from the frame memory 104 by the microcomputer of the IPU 103 and is formed on the surface of the transfer paper by the printer, and the printer reverses the transfer paper and sets the double-sided conveyance path. It is conveyed to the stacking position of the double-sided tray 720 via. On the other hand, the scanning unit 200 performs one page turning by scanning in the left direction to read the next spread page, and the read image data is read by the frame memory 104.
Be stored in. The transfer sheets stacked on the double-sided tray 720 are re-fed, and the read image data of the left page of the two-page spread original document is read from the frame memory by the microcomputer of the IPU 103 and formed on the back surface of the transfer sheet by the printer. The transfer paper is ejected. In the case of FIG. 88, it takes time to reverse the transfer paper for double-sided image formation and to re-feed paper by the conveyance path, and the productivity of 1TO1 double-sided copying is low.

FIG. 89 shows the operation timing in the 1TO1 high-speed double-sided copy mode in which the frame memory 104 is used to form an image in a different order from the read page order. At this operation timing, first, the image on the right one page of the two-page spread original is formed on the surface of the first transfer sheet, and the transfer sheet is stacked on the double-sided tray 720 via the double-sided conveyance path. Secondly, the images of the second and third pages of the two-page spread original document are read, and the read image data is stored in the frame memory 104.
Thirdly, the previously read image data of three pages is read out from the frame memory 104 and imaged on the surface of the second transfer paper, and the transfer paper passes through the double-sided conveyance path to the double-sided tray 7.
Stacked at 20. Fourth, after the first transfer paper stacked on the double-sided tray 720 is re-fed and the image data of two pages is read from the frame memory 104 and formed on the back surface of the first transfer paper, the transfer is performed. The paper is ejected.
Thereafter, the two-page spread image of the original document is output in the reverse order of the reading order, so that double-sided copying of the original document is performed at high speed. That is, in the case of FIGS. 84 and 85, the conveyance period of the transfer sheet after the front surface image formation is the same as the reversal time for double-sided image formation of the transfer sheet and the re-feeding time by the conveyance path.
An image of the next transfer sheet is formed during the transfer sheet conveyance period after the front surface image is formed, and a copy productivity of about 1.5 to 2 times that of the conventional one can be obtained from the illustrated repeating time.

In this system, in the double-sided copy mode, when a large number of copies with two or more copies are made, images are formed in page order as shown in FIG. 88, and images are formed on the surface of the transfer paper with the designated number of copies. After the transfer paper of No. 1 is temporarily stored in the double-sided tray 720, these transfer papers are re-fed from the double-sided tray 720, an image is formed on the back surface of the transfer paper, and the paper is discharged.

This apparatus performs a stable page turning operation against the suction / separation method by the displacement of the suction roller. In this method, only the leading edge of the page of the original document is attracted, displaced upward, and guided to the page storage portion, so the attraction position is important. As described above, the page storage sensor detects the page edge portion of the original document during the page-turning scanning, and the operation position of suction and separation with respect to the edge of the original document that changes due to repeated page-turning is determined. That is, the end portion on the scanning end side is detected from the page storage position data, and the rising position of the suction roller during page turning scanning is determined,
The same amount of pages is always adsorbed and separated.

Next, selection of the double-sided copy mode will be described. There are two-sided copy modes: original double-sided copy mode, double-page spread double-sided copy mode, and automatic double-sided copy mode.
The main control board 107 has an original double-sided copy mode in which an original double-sided copy is made each time the operation button 612 is pressed, a double-sided spread page double-sided copy mode in which a double-sided spread page is copied.
The automatic double-sided copy mode is set in sequence, in which two modes are automatically switched so that the images on each page of the original are packed from the front side of the first sheet.

The main control board 107 cancels all double-sided copy modes and selects the single-sided copy mode by default, such as power-on, mode clear, main document reading mode selection, and the like. The above three double-sided copy modes are effective in the independent page copy mode. In the double-page spread double-sided copy mode, only the original double-sided copy mode can be selected, and a double-sided copy is performed in which the read image is formed on the front and back sides of the sheet for every two-page spread of the original. Also, only one double-sided copy mode is valid in the sheet reading mode of the upper side reading, and by selecting the original double-sided copying mode, every time the original is replaced and the print key is pressed, the front and back sides of the paper are double-sided sequentially. Repeat copying.

When the double-sided copying mode is selected, the image reference position is preferentially selected by aligning the left end (reference of the left end) or the right end (reference of the right end), and a margin for the binding margin is normally created. In the double-sided copying mode, the binding margin is automatically formed at the same position on the sheet by sequentially switching the image reference on the front and back sides of the sheet regardless of the designation of the left end and the right end of the image reference position.

In general, the original document is printed on both sides and has a large number of pages. When copying the original document, the frequency of double-sided copying is high due to the amount. By switching between these two modes, an original double-sided copy mode in which images on the front and back of the original are formed on the front and back of the paper, and a double-sided copy mode in which images on the front and back of the original are formed on the front and back of the paper. An automatic double-sided copy mode in which the pages are stacked and formed is provided, and the double-sided copy mode is selected depending on the copy page of the original document.

Next, the double-sided copying method of this apparatus will be described. This apparatus reads both double-page spreads of this document in one scan, and the read image data is read by the frame memory 104.
Store in. Next, the scanning unit 200 scans the pages of the original document by scanning in the reverse direction, and by reading the pages, the spread page images of the original document are sequentially read. In synchronization with that, the image data is transferred to the IPU 10 at the time of page turning scanning after the reading is completed.
Frame memory 104 by the microcomputer 3
Read out from the printer and formed on paper by the printer.

As shown in FIG. 79, the printer main body 701 of the image forming unit feeds a sheet from a selected one of the sheet feeding trays 707 and 708 or the manual feed table 709, and transfers the image to the photosensitive drum 706. After the image is formed and transferred to the sheet by the transfer charger 710, the fixing device 712
Fix with. In the image forming process, a toner image is formed on the photosensitive drum 706 by a series of processes including charging, exposure, development, and transfer, and the toner image is transferred onto a sheet by a transfer charger 710. Then, the toner image on the sheet is fixed by a fixing device 712, and the photosensitive image is exposed. The body drum 706 is cleaned with a cleaning device. The writing of the image on the photoconductor drum 706 is performed by exposing and scanning the photoconductor drum 706 by modulating the emission of the semiconductor laser 405 by the modulator based on the image data read from the frame memory 104. An image pattern of electric charges (electrostatic latent image) is formed on the body drum 706.

During double-sided copying, the image data to be formed on the front surface of the paper is read from the frame memory 104 according to the mode, an image is formed on the front surface of the paper, and the paper is conveyed by the reversing unit 703 toward the bank 705. The paper is switched back by a double-sided reversing unit provided in the bank 705 in the vertical direction, and is conveyed and stacked on the double-sided tray 720 so that the image surface is on the upper side. Then, the paper is re-fed from the double-sided tray 720 and conveyed into the printer main body, the image data of the back surface of the paper is read out and imaged on the back surface of the paper in the same manner as described above, and then the back surface of the paper is discharged upward. By repeating the above, a double-sided image is formed on the paper.

FIG. 73 shows an example of double-sided copying in the independent page copying mode. In the independent page copy mode, the spread pages of the original are read, and the range is separated for each page as described above to form a read image on the front and back sides of the sheet.

In the first double-sided copying method of this apparatus, the image of the two-page spread original is read by the scanning unit 200, the image information of the right page is formed on the surface of the paper by the printer, and the printer reversely conveys the paper. Refeed and scan unit 2
00 turns the pages of the double-page spread original document, reads the image of the next double-page spread page, and forms the image information of the left page on the back side of the re-fed paper by the printer. As a result, as shown in FIG. 73 (a), an original double-sided copy is obtained in which the images on the front and back of the page of the original are formed on the front and back of the paper. This is because the front and back relations of the main document and the paper are kept the same when the copy is further bound or bound, and the image separation of the spread continuous pages of the main document does not occur.

In the second double-sided copying method of this apparatus, the scanning unit 200 reads the image of the spread book document, forms the image information of the left page on the surface of the paper by the printer, and the scanning unit 200 prints the spread book document. The page is turned over, the printer reversely conveys the paper and re-feeds it, and the image information of the right page is formed on the back surface of the re-feeding paper. As a result, as shown in FIG. 73 (b), a spread double-sided copy is obtained in which the images of the spread pages of the original are formed on the front and back sides of the paper. This is a general case of copying each page, and when the copy start page of this document is a spread left page, the read image of each page is packed from the front surface of the first sheet in double-sided copying. It can be placed so that if the duplex copy is bound without creating unwanted images on the front side of the first sheet, the desired image will begin on its first side.

In the third double-sided copying system of this apparatus, one of the left and right pages at the start of image formation of the two-page spread original document has the operation button 61.
6, 617, when the image formation start page is a double-page spread right page, the scanning unit 200 reads the images on the front and back sides (one front and back sides) of the original document in the original duplex copy mode. To form on the front and back of the paper with a printer. Further, when the specified image formation start page is the spread left page, the scanning unit 20 is set in the spread page double-sided copy mode.
0 reads the double-page spreads of the original document and forms the read images on the front and back sides of the paper by the printer. This can be selected as the automatic double-sided copy mode by the double-sided key 612, and the image layout on the front and back sides of the paper at the time of double-sided copy is automatically selected. In this automatic double-sided copy mode, the operator can arbitrarily specify a desired start designation page without being aware of the left and right sides of the copy start page during double-sided copy, and the image can be arranged from the front surface of the first sheet. Do not make unnecessary image pages on the front side of the first sheet.

In the double-page spread mode in which the images of the double-page spreads of the original are formed on the front and back sides of the sheet, there is a problem that continuous images such as gravure are separated on the front and back sides of the sheet during double-sided copying. is there. The same applies to the case where the double-page spread double-sided copy mode is selected by designating the double-page spread left page of the original document as the image formation start page in the automatic double-sided copy mode (with the image on the first side). As shown in FIG. 90, the guidance display on the operation unit 99 of this device is an LCD with 20 characters and 2 lines.
When the images on both facing pages of this document are formed separately on the paper as described above, a warning message, for example, "The facing page image will be separated" is displayed to alert the operator. Encourage. According to this guidance, the operator cancels the specified double-sided copy mode, or confirms that there are no continuous images on both facing pages of the original document to be copied and presses the print key to start copying in the two-sided spread page copying mode. .

Next, double-sided copying of a two-page spread will be described. As shown in FIG. 67, the operation unit 99 has operation buttons 609 for selecting an independent page copy mode for copying an independent page of the original document and a spread page copy mode for copying a double-page spread of the original document as copy mode. This operation button 609 is
A page unit for copying is designated. For a two-page spread original document as shown in FIG. 69, an independent page copy mode for copying an image on paper for each page of the original document as shown in FIG. 71, and FIG. 70 are shown. As described above, there is a double-page spread mode in which an image of a double-page spread of the original is copied onto one page of paper. A general independent page copy mode is selected as a default when the power is turned on or the original mode is selected, and the spread page copy mode is used when the copy paper or the file amount is reduced.

When the double-page spread copy mode is selected, selection of the double-sided copy mode by the double-sided key 612 is limited to one original double-sided copy mode. As shown in FIG. 72, the first double-page spread and its page are selected. The second two-page spread after turning is automatically copied on the front and back sides of one sheet of paper. That is, the scanning unit 200 reads the image of the two-page spread of the main document, forms the two-page spread image information of the main document on the surface of the paper by the printer, and the printer reversely conveys the paper and re-feeds the paper, and the scanning unit. 200 turns the page and reads the image of the next two-page spread, and the printer forms the read image on the back side of the re-fed paper. As a result, the number of pages for copying is reduced, the copying time is shortened, and the file amount for copying is halved.

Next, blank sheet discharge in the two-sided original copy mode will be described with reference to FIGS. 93 to 96. Generally, this original is printed on both sides, and when copying a part or all of it, there are left and right pages as the copy start pages.
Also, in double-sided copying, the total number of pages specified by the operator is even or odd. In particular, the desired first page and last page may extend over the double-page spread depending on the page structure of the chapter of the part to be copied of the original document.

In the present apparatus for reading the image of the main document and automatically turning the pages of the main document to automatically form the images of the main document on both sides of the paper, the main control plate 107 has one sheet depending on the mode. Eject the surface of the eye paper as a blank image,
In addition, the back side of the final sheet is discharged as a blank image. As a result, even when the copy start (image formation start) designated page of the main document in the double-sided copy mode is performed, extra image information of the previous page of the designated page is not formed on the first side of the sheet. Further, even if the final surface of the paper is halfway depending on whether the copy start page is the left page or the right page, or whether the total number of pages to be copied is even or odd, extra image information of the subsequent page of the designated page is not formed.

In this apparatus, the main control plate 107 displays the image information of the right page of the spread book document on the paper in the first mode in which the blank sheet is discharged in the book document double-sided copy mode, as shown in FIGS. 93 and 94. Formed on the front side, the image information of the left page of the next double-page spread original is formed on the back side of the paper, that is, the original front and back images of this original are formed on the front and back sides of one sheet. When the image formation start page of the double-page spread original is designated as the left-page spread, the front surface of the first sheet (first sheet) is made a blank image, and the image of the copy start page is formed on the sheet.

In the original double-sided copy mode in which one front and back images of the original document are formed on the front and back sides of one sheet, the operation buttons 61 for the left and right pages and the number of pages to be copied of the two-page spread original document are started.
6, 617, 618, designated by the ten keys, and when the image formation start page is a spread left page and the number of copied pages is an even number, or when the image formation start page is a right page and the number of copied pages is an odd number, the image of the last page to be copied Are placed on the surface of the paper. Therefore, the back side of the final sheet is discharged as a blank image. That is, the main control plate 107 calculates the case where the final page is finished and the final surface is halfway (an image is formed only on one side of the last sheet) by the above-mentioned page designation, and the image of the final page to be copied is printed. It is placed on the surface of, and does not form extra image information.

In the second mode, the main control plate 107 forms the image information of the left page of the two-page spread original on the front surface of the paper and the image information of the right page on the back surface of the paper.
That is, in the double-page spread double-sided copy mode in which two double-page spreads of the original document are formed on the front and back sides of one sheet of paper, when the image formation start page of the double-page spread original document is the double-page spread right page, the front side of the first sheet is printed. The surface of the first sheet of double-sided copy is eliminated as a blank image, and unnecessary image information of the previous page of the designated copy start page is not formed.

The main control board 107 is a double-page spread double-sided copy mode in which the images of both double-page spreads of the main document are formed on the front and back sides of the sheet, and the operation start buttons 616, 617, and the image formation start page of the double-page spread original are set. 618, designated by the numeric keypad,
When the image formation start page is a spread left page and the number of copied pages is odd, or when the image formation start page is the right page and the number of copied pages is even, the image of the final copy page is arranged on the surface of the paper. Therefore, the back side of the final sheet is discharged as a blank image. That is, the main control plate 107 calculates the case where the final surface of the original is finished and the final surface is half-edge, and arranges the image of the final page to be copied on the front surface of the paper without forming extra image information. .

This system reads this manuscript in page order,
The image of the read page is formed on a sheet in page order. Therefore, normally, the paper is ejected on the back side, that is, the paper is ejected with its image side facing down. During double-sided copying, the paper is reversed during the process, and the paper after the back surface formation is ejected as it is.
In the original double-sided copy mode, when the image forming start page is specified as the double-page spread left page, and in the double-page spread double-sided copy mode when the image formation start page of the double-page spread original is specified as the double-page spread right page, the main control plate 107 displays the first ( The image of the (first) page is formed on the surface of the first (first) sheet, and the sheet is ejected with its image side facing up. As a result, a blank sheet is not imaged or reversed, a wasteful copying process on the back surface of the first sheet is omitted, and the sheet is quickly ejected to shorten the copying time.

In the original double-sided copy mode, the main control board 107 designates the image formation start page of the double-page spread original document when the number of pages to be copied is an even number on the left spread page, or when the image formation start page of the double-page spread original document is designated. Is the right page and the number of copied pages is odd, the image of the last page to be copied is arranged on the front surface of the paper. Further, the main control board 107 designates the image forming start page of the double-page spread original in the double-page double-page copy mode when the left page of the double-page spread and the number of copied pages is odd, or when the image forming start page of the double-page spread original is designated. Is the right page and the number of copied pages is an even number, the image of the last page to be copied is arranged on the front surface of the paper. The main control board 107 calculates these times by input signals from the operation unit 99 to determine whether the image formation start page is the left page or the right page and the number of pages to be copied. To be discharged. Then, the final page image is formed only on the front surface of the paper. This sheet is discharged as it is on the back side (sheets are discharged with the front side facing up), and a wasteful copying process on the back side of the final sheet is omitted, so that the final sheet is discharged early and the copying time is shortened.

The control of the blank image in the above-mentioned double-sided copy mode is determined by the main control section of the main control board 107 which controls the operation section 99 and controls the copy mode from the set double-sided copy mode and page number information. To do. Further, according to a command from the main control unit, the sequence control unit of the main control plate 107, which controls the timing of image formation, controls the image formation of the paper and the conveyance and discharge of the paper.

Next, blank sheet discharge in the double-page spread double-sided copy mode will be described. First, the image information of both double-page spreads of this document is formed on the front side of the sheet, and the image information of the next double-page spreads is formed on the back side of the sheet (an image of four pages of two double-page spreads, one page in total). Copying on both sides of the document) This section describes the double-sided spread original copy mode.

The main control unit for controlling the copy mode determines the number of scanning scans and the number of page-turning scanning operations of the two-page spread original document: scanning count = (copy page numerical value + 1) / 2 (when the copy start page is the left page) Number of times = (number of pages to be copied + 2) / 2 (when the copy start page is the right page) However, the remainder is calculated using a relational expression of truncation to manage the operation of this apparatus. As shown in FIG. 95, when the number of copy screens calculated by the number of scans is an odd number, the main control unit discharges the final sheet with the back side of the sheet as a blank image. For the final sheet, the final screen is formed only on the front side, and this sheet is reversed and the back side is discharged (the back side is discharged as the upper side).

Also, in the double-sided spread page copy mode, the main control section performs the following calculation based on whether the copy start page is the left page or the right page according to the input signal from the operation section 99 and the copy page numerical value. Copy page number / 4 Based on the remainder, it is determined based on the following Table 1 whether or not to eject the blank sheet on the back side of the final sheet, and according to the result, the blank sheet on the back side of the final sheet is ejected.

[0313]

[Table 1]

That is, the main controller sets the number of copied pages to 4
If the remainder is 0 or 3 and the copy start page is the left page, and if the copy start page is the right page and the remainder is 1 or 2,
The back side of the final sheet is determined as a blank image. It is very easy to obtain the remainder obtained by dividing the predetermined value by 4 on the computer, and the lower 2 bits of the binary number will be the remainder. As a result, the surplus is easily calculated based on the copy start page and the number of pages of the designated original document. In the above-described control of the blank page image in the double-page spread mode, the main control section determines a blank page and the sequence control section controls the image formation in the same manner as described above.

Next, one-sided (half) blank paper in the two-page spread mode will be described. Generally, this original is printed on both sides, and when copying a part or all of the original, there are left and right spread pages at the beginning and the end. This device is a spread 2
In the double-page spread mode in which an image of a page is copied onto one sheet of paper, half of the sheet is made a blank image without adding unnecessary information for copying, and only the desired page is copied.

When copying a part or the whole of a two-sided printed original document, the left and right pages of the copy start page are copy start page keys 616 of the operation unit 99 as shown in FIG.
At 617, the operator specifies. In particular, depending on the page structure of the chapter of the part to be copied in this manuscript, the start and end pages may extend over the spread pages. The unnecessary part is the beginning of the copy page,
That is, if it is on the left side of the first sheet surface, the search will be hindered. As shown in FIG. 96, in the double-page spread mode, the main control unit erases the image with the left side of the first sheet as an unnecessary section and erases a blank page when the image forming start page of the double-page spread original is designated as the right page. As an image, only the right page image of this document is formed.

In the spread page copy mode, the main control section determines whether the last page is the left page by specifying the left and right pages at the start of image formation and the number of pages to be copied in response to an input signal from the operation section 99. The left and right pages of the image formation start page are selected by operating copy start page keys 616 and 617 shown in FIG. 68. This is used by the main control unit for recognizing the left and right copy pages in the independent page copy mode, and is also used for erasing unnecessary page images in the double-page spread mode. In the double-page spread mode, if copying is started by pressing the print key when the copy start page is not specified, the main controller does not erase the image and the first left page and the last right page are spread. A page image is formed on the paper.

The copy page number is selected by operating the copy page number setting keys 618 and 619 shown in FIG. The setting of the number of copied pages includes a first mode for inputting a copy start page and a copy end page, and a second mode for inputting the total number of copy pages. The first mode is used when page numbers are assigned to this document, and the second mode is effective when page numbers are not added to this document or when page numbers are skipped. In the first mode, the main control unit calculates the number of copied pages from the start page and the end page as follows: copy end page number-copy start page number + 1 = copy page number.

As described above, in the two-page spread mode, the main control section determines when the copy start page is the left page and the copy page number is odd, and when the copy start page is the right page and the copy page number is even. At this time, the right side of the final sheet is converted into a blank image to form an image on the final page. Therefore, only the necessary portion of the final page is copied, and a copy that is easy to see is obtained. The main control unit for controlling the copy mode manages the operation unit 99 and controls the blank page in the spread page copy mode based on the set duplex copy mode and page number information. The sequence control unit that controls the timing of image formation controls the image formation of paper and the conveyance and discharge of paper according to commands from the main control unit.

The deletion of the image information for forming the blank sheet image is performed by the IPU 10 based on the instruction from the main control board 107.
3 microcomputer. The microcomputer of the IPU 103 reads the dummy white data stored in advance in the frame memory 104 at the time of reading the data from the frame memory 104 and erases the write data in the frame memory 104 for forming a blank image in the image forming mode. . To erase the image information for forming the blank page image, conversion such as masking the blank page image data using a logic circuit or the like in any of the data transfer lines of the data flow block shown in FIG. Can be easily realized by

Although this apparatus is intended for a left-turning (left cover) main manuscript with a relatively high ratio of horizontal writing, there is also a vertical writing right-turning main manuscript. In this case, the device may be arranged symmetrically, and the right and left pages are the reverse of the above description. Therefore, the inventions of the respective claims include those in which the left and right pages and edges of the system are different.

As described above, in this system, one
A two-page spread double-sided copy mode, in which images on the front and back of a sheet are formed, and an original two-sided copy mode, in which two-page spread images of the original are formed on the front and back of the sheet, can be selectively executed. The double-sided copy mode can be selected depending on the page, and the main document image can be formed on a sheet in a desired copy mode, which is suitable for binding or binding a copy.

By forming the image information of the two-page spread original on the front and back sides of the paper in the original double-sided copy mode,
It is possible to obtain a copy in which one image of the front and back of the original is formed on the front and back of paper, and the image can be kept the same on the front and back of one of the originals, and the copy is bound. This is effective when binding or binding, and in particular, images that are continuous over a double-page spread such as gravure do not cause separation during double-sided copying.

By performing double-sided copying of the double-page spread original in the double-page spread double-sided copy mode, a copy in which an image of the double-page spread double-page is formed on the front and back sides of the paper can be obtained. When copying each page, it is effective when the copy start page of this document is a double-page spread, and the image can be placed from the front side of the paper during double-sided copying and unnecessary on the front side of the first paper. No more making good images. Therefore,
When a copy is bound, the image starts from the first side, and the contents can be easily determined and viewed. Further, waste of copying can be prevented.

When the image forming start page is specified as the right-side spread, one front and back image of this original is formed on the front and back of the sheet,
When the image formation start page is specified as the double-page spread left side, the image of the double-page spread of the original document is formed on the front and back sides of the paper, and the front-back relationship between the double-page spread paper and the paper is automatically selected during double-sided copying. it can. For this reason, during double-sided copying, the image can be arranged from the front side of the sheet without the operator having to be aware of the left and right sides of the copy start page, and unnecessary images cannot be formed on the front side of the first sheet. Therefore, even when a copy is bound, the image starts from the first side, and paper can be saved. Also, by automatically selecting the image layout form on both sides of the paper by designating the image formation start page of the two-page spread original, the image formation on both sides of the paper is suitable for an operator who does not know the image formation form on both sides of the paper in many cases. It can be performed.

Further, when the double-page spread images of the original are formed on the front and back sides of the sheet, a warning display of the separate formation of the double-page spread images can be displayed to cancel the mode and reduce image formation errors. . Further, in the double-sided image forming mode in which an image is formed from the first side of the sheet, when the spread left page of this document is designated, a warning display of the separate formation of the spread double-page images is displayed to cancel the mode. Image formation errors can be reduced.

By forming the image information of the two-page spread on the front side of the sheet and the image of the two-page spread of the next main document on the back side of the sheet, the two-page spread and the next two-page spread of the main document are formed. Images of pages can be automatically formed on the front and back sides of the paper, the number of pages to be copied can be reduced, the copying time can be shortened, and the file amount of the copied material can be halved.

Further, in general, this original is printed on both sides, and when copying a part or all of it, the copy start page includes a left page and a right page. Also, in double-sided copying, the total number of pages specified by the operator is even or odd. In particular, depending on the page structure of the chapter of the part to be copied of this manuscript, there are cases where copying is performed across pages. Therefore, in the double-sided copy mode, by setting the front side of the first sheet and the back side of the final sheet as blank images, extra image information is not formed on the first side due to the designated start page of this document. Further, even if the final sheet surface is halfway depending on whether the copy start page is the left page or the right page and the total number of pages to be copied is even or odd, no extra image information is formed.

In the original double-sided copy mode, when the image formation start page is specified as the spread left page, the front surface of the first sheet becomes a blank image, and the front surface of the first sheet has no image. Extra image information on the previous page of the start page is not formed. Also, in the original double-sided copy mode,
When the designation of the image forming start page is the spread left page and the number of copied pages of this document is even, and / or when the designation of the image forming start page is the spread right page and the number of copied pages of this document is odd By making the back surface of the final sheet a blank image, extra image information is not formed on the sheet when the final page of the original is copied and the surface of the final sheet is half-finished.

In the double-sided spread copying mode, when the image forming start page is designated as the right-side spread, the front surface of the first sheet becomes a blank image, and the front surface of the first sheet has no image. Unnecessary image information on the previous page of the image formation start page is not formed. Also, in the mode in which the image of the two-page spread original is read and the page image information is formed on the front surface of the paper, the paper is inverted and re-fed, and the page image information is formed on the back surface of the paper, only the front surface is formed. By ejecting the sheet on which the image of the first page is formed with the front side facing up, the sheet can be ejected quickly while keeping the page order, and the image forming time can be shortened. It is possible to omit the step of forming an extra image on the back surface of the first sheet without reversing the sheet.

In the double-sided spread copying mode, when the image formation start page is specified as the spread left page and the copy page number is odd, the image formation start page is specified as the spread right page and the copy page number. By setting the back side of the final sheet to be a blank image when the number of is specified is even, unnecessary image information is not formed on the sheet when the final sheet surface is half-finished after the copying of the final copy page of the original document is completed.

Also, the image information of the two-page spread of the main document is formed on the front surface of the paper, and the image information of the next two-page spread of the main document is formed on the back surface of the paper. By making the back side of the blank sheet a blank image, it is possible to obtain a copy that is easy to see without copying unnecessary screens, and it is possible to eliminate unnecessary copying steps on the back side of the final sheet and discharge the final sheet quickly. Copying time can be shortened.

Also, the image information of the two-page spread of this document is formed on the front surface of the paper, the image information of the next two-page spread is formed on the back surface of the paper, and the number of copied pages is divided by 4 to obtain the remainder. Is 0 or 3 and the image forming start page is the left page, the copy page number is divided by 4 and the remainder is 1 or 2, and the image forming start page is the right page. When is a blank image, it is very easy to calculate the remainder divided by 4 on the computer, and the lower 2 bits of the binary number are the remainder, so
The calculation can be easily performed from the copy start page and the number of copied pages of this document.

In the mode in which the image of the two-page spread original is read, the page image information is formed on the front surface of the sheet, the sheet is inverted and re-fed, and the page image information is formed on the back surface of the sheet, By ejecting the paper on which the image of the last page is formed only on the front side with the back side facing up, it is possible to eliminate the wasteful image forming process on the back side of the final sheet, and to eject the paper quickly in page order to form an image. The time can be shortened.

In general, this original is printed on both sides, and when copying a part or all of it, there are two pages of left and right spreads at the beginning and the end. In the double-page spread mode in which the image of the double-page spread is copied onto one sheet, the unnecessary page portion of the original document, that is, the half surface of the sheet is used as a blank image, and only the desired page of the original document is copied to copy the sheet. No unnecessary information is added to the.

Further, in general, this original is printed on both sides, and when copying a part or all of it, the operator specifies the left and right sides of the start page. In particular, depending on the page structure of the chapter of the part of the original document to be copied, there are cases where copying is performed across spread pages. If the unnecessary portion is at the beginning of the page, that is, on the left side of the first face, the search will be hindered. Therefore, in the double-page spread mode in which the image of the double-page spread is copied onto one sheet, when the start of image formation of the double-page spread original is designated as the right page, the left side of the first sheet is made a blank image as an unnecessary portion. As a result, a copy that is easy to see can be obtained without copying unnecessary portions. Also, in the spread copy mode,
When the image forming start page is a spread left page and the number of copied pages is odd, and / or when the image forming start page is a spread right page and the number of copied pages is an even number, the right side of the final sheet is By using a blank image, it is possible to obtain a copy that is easy to see by copying only the necessary part of the final page.

[0337]

As described above, according to the first aspect of the present invention, in the main document image forming apparatus for turning the pages of the main document to read the main document and form a read image on a sheet, Since the first double-sided image forming means for forming the front and back images on the front and back sides of the sheet and the second double-sided image forming means for forming the two-page spread image of the original document on the front and back sides of the sheet are provided, The double-sided image forming mode can be selected depending on the image forming page, and the main document image can be formed on a sheet in a desired image forming mode, which is suitable for binding or binding an image formed article.

According to the second aspect of the present invention, in the method of forming an image of a book original by turning the pages of the book original and reading the book original to form a read image on a sheet, the image of the spread book original is read and read image information is obtained. After the image information of the right page of the double-page spread original document stored in the storage means is formed on the front surface of the sheet, the pages of the original document are turned over, the front and back sides of the sheet are reversed, the sheet is re-fed, and the page is opened. The image of the main document is read, the read image information is stored in the storage unit, and the image information of the left page of the spread main document from the storage unit is formed on the back surface of the paper, so that one front and back image of the main document is read. It is possible to obtain an image-formed product that is formed on the front and back of paper, and to keep the image the same on the front and back of one sheet of this document, and when binding or binding the image-formed product. Is effective, especially Continuous images across spread pages of the via such separation of the duplex image formation is not generated.

According to the invention of claim 3, in the method of forming an image of a book original by turning the pages of the book original and reading the book original to form a read image on a sheet, the image of the spread book original is read and read image information is obtained. After storing the image information of the left page of the spread book original from the storage means on the front surface of the paper, the pages of the original are turned over, the front and back of the paper are reversed, and the paper is re-fed. Since the image information of the right page of the double-page spread original document from the storage means is formed on the back surface of the sheet, an image-formed product can be obtained in which the image of the double-page spread page of the main document is formed on the front and back sides of the sheet. This is effective when the image formation start page of this document is a double-page spread page when images are formed on each page in general, and the image can be arranged from the front side of the paper during double-sided image formation. Unwanted images on the surface of Ranakunaru. Therefore, when the image-formed product is bound, the image starts from the first surface, and the contents can be easily determined and easily viewed. Furthermore, waste of image formation can be prevented.

According to the fourth aspect of the present invention, in the original document image forming method of turning over the pages of the original document and reading the original document to form a read image on a sheet, the image formation start page of the double-page spread original document is started. When the designation of the image forming start page designating means is the spread right page, one front and back image of this document is formed on the front and back of the sheet, and the designation of the image forming start page designating means is spread. In the case of the left page, the two-page spread image of the original document is formed on the front and back sides of the sheet, so that the front-back relation between the two-page spread page and the sheet can be automatically selected during double-sided image formation. For this reason, at the time of double-sided image formation, the image can be arranged from the front surface of the paper without being noticed by the operator on the left and right sides of the image formation start page, and an unnecessary image cannot be formed on the front surface of the first paper. Therefore, even when the image formed article is bound, the image starts from the first side, and the paper can be saved.

According to the fifth aspect of the invention, in the double-sided original image forming method according to the fourth aspect, the image arrangement mode on both sides of the paper is automatically selected by designating the image formation start page of the double-page spread original. In many cases, it is possible to perform image formation on both sides of a sheet suitable for an operator who does not know the image formation form on both sides of the sheet.

According to the sixth aspect of the present invention, in the main document image forming apparatus for turning the pages of the main document and reading the main document to form a read image on a sheet, the two-page spread images of the main document are displayed on both sides of the sheet. Since the warning display means for displaying the warning when forming is provided, it is possible to cancel the mode and reduce image forming errors.

According to the seventh aspect of the invention, in the main document image forming apparatus for turning the pages of the main document to read the main document to form a read image on a sheet, an image for designating an image formation start page of the two-page spread main document. Forming start page designating means and warning display means for displaying a warning when the spread left page of the original is designated by the image forming start page designating means in the double-sided image forming mode for forming an image from the first side of the sheet. Since it is provided, the mode can be released to reduce image formation errors.

According to the eighth aspect of the present invention, in the method of forming an image of a main document by turning the pages of the main document and reading the main document to form a read image on a sheet, the image of the two-page spread of the main document is read and read. The image information is stored in the storage means, the image information of the two-page spread from the storage means is formed on the front surface of the sheet, and then the front and back sides of the sheet are reversed and re-fed to turn the pages of the original document and book. Since the image of the two-page spread of the original is read and the read image information is stored in the storage means and the image information of the two-page spread of the storage is formed on the back surface of the paper, the two-page spread of the original and the next It is possible to automatically form a two-page spread image on the front and back sides of a sheet, reduce the number of pages for image formation, shorten the image formation time, and reduce the file amount of the image formation product by half.

According to the ninth aspect of the present invention, in the main document image forming apparatus for turning pages of the main document and reading the main document to form a read image on a sheet, the image of the main document is read and formed on the front and back sides of the sheet. Since the double-sided image forming means, the page designating means for designating the image forming page of the original document, and the blanking means for rendering the front surface of the first sheet and the back surface of the final sheet as blank images are provided, It is possible to prevent unnecessary image information from being formed on the first surface by the image formation start designation page.
Further, even if the final sheet surface is halfway depending on whether the image formation start page is the left page or the right page, or whether the total number of image formation pages is even or odd, no extra image information is formed.

According to the tenth aspect of the present invention, after the image of the double-page spread of the original document is read and the image information of the right page of the double-page spread original is formed on the surface of the paper, the pages of the original document are turned over and the paper (2) Reversing the front and back sides and re-feeding the paper, reading the image of the double-page spread of the original document, and forming the image information of the left page of the double-page spread original document on the back side of the sheet, and the image formation of the double-page spread original document. Since the image forming start page designating means for designating the start page and the blanking means for rendering the surface of the first sheet a blank image when the designation of the image forming start page designating means is a spread left page, the first sheet No image is formed on the front surface of the sheet, and the extra image information of the page preceding the designated start page is not formed.

According to the eleventh aspect of the present invention, after the image of the double-page spread of the original document is read and the image information of the right page of the double-page spread original is formed on the surface of the sheet, the pages of the original document are turned over to form the sheet. (2) Reversing the front and back sides and re-feeding the paper, reading the image of the double-page spread of the original document, and forming the image information of the left page of the double-page spread original document on the back side of the sheet, and the image formation of the double-page spread original document. Image forming start page designating means for designating a starting page, and when the designation of the image forming start page designating means is a spread left page and the number of image forming pages of the original is an even number, and /
Alternatively, since the specification of the image forming start page designating means is a spread right page and the number of image forming pages of the original is odd, a blanking means for forming a blank image on the back side of the final paper is provided, When the image formation of the page is completed and the surface of the final sheet becomes half-finished, unnecessary image information is not formed on the sheet.

According to the twelfth aspect of the invention, in the method of forming an image of a book original by turning the pages of the book original and reading the book original to form a read image on a sheet, the image of the book spread original is read to read the image of the book spread original. The image information of the left page is formed on the front side of the sheet, the front and back sides of this sheet are reversed and re-fed, and the image information of the right page of the double-page spread original is formed on the back side of the sheet to form the image of the double-page spread original. The start page is designated by the image forming start page designating means, and when the designation of the image forming start page designating means is a spread right page, the surface of the first sheet is made a blank image, so that the surface of the first sheet is The image disappears, and unnecessary image information on the previous page of the image formation start page is not formed.

According to the invention of claim 13, claim 1
In the two-sided image forming method of the original document described in 0 or 12,
A reverse-side discharging unit that reverses and discharges the sheet is provided, the image of the two-page spread original is read to form page image information on the front side of the sheet, the sheet is reversed and re-fed, and the page image is printed on the rear side of the sheet. Since the paper on which the information is formed and the image of the first page is formed only on the front surface is ejected with the front surface facing upward, the paper can be ejected quickly while keeping the page order, and the image forming time can be shortened. 1st without making a blank image or turning over the paper.
It is possible to omit the step of forming an extra image on the back surface of the sheet.

According to the fourteenth aspect of the present invention, in the method of forming an image of a two-page spread original, the image of the two-page spread original is read by reading the image of the two-page spread original in a method of forming a read image on a sheet by turning over the pages of the main document. The image information of the left page is formed on the front side of the sheet, the front and back sides of this sheet are reversed and re-fed, and the image information of the right page of the double-page spread original is formed on the back side of the sheet to form the image of the double-page spread original. The starting page is designated by the image forming start page designating means, the number of image forming pages of the original is designated by the image forming page number designating means, and the designation of the image forming start page designating means is a spread left page and the image forming is performed. When the number of pages designation means is an odd number, and / or when the designation of the image formation start page designation means is a spread right page and the designation of the image formation page number designation means is an even number, the back side of the final sheet is a blank image. The final image of this manuscript Image formation Narupeji is completed unnecessary image information on the paper when the final for the paper is odd and is not formed.

According to the fifteenth aspect of the present invention, in the original document image forming method of turning pages of the original document and reading the original document to form a read image on a sheet, a two-page spread of the original document is read by reading an image of the two-page spread original document. Image information of two pages is formed on the front surface of the sheet, the front and back sides of this sheet are reversed and re-fed, the image information of the two-page spread original document is read, and the image information of the two-page spread of the two-page spread document is printed on the back surface of the sheet. When the number of image forming screens is odd, the back side of the final sheet is made a blank image, so an image is formed on an unnecessary screen and an easy-to-see image is obtained, eliminating unnecessary image forming steps on the back side of the final sheet. As a result, the final sheet can be discharged quickly, and the image forming time can be shortened.

According to the sixteenth aspect of the present invention, in the original document image forming method of turning the pages of the original document to read the original document to form a read image on a sheet, a two-page spread of the original document is read by reading an image of the two-page spread original document. Image information of two pages is formed on the front surface of the sheet, the front and back sides of this sheet are reversed and re-fed, the image information of the two-page spread original document is read, and the image information of the two-page spread of the two-page spread document is printed on the back surface of the sheet. When the image forming start page and the number of image forming pages of the original are formed, the number of image forming pages is divided by 4, and the remainder is 0 or 3, and the image forming start page is the left page, and Or, if the number of image forming pages is divided by 4 and the remainder is 1 or 2, and the image forming start page is the right page, the back side of the final sheet is made a blank sheet image, and therefore 4 on the computer.
The calculation of the remainder divided by is very easy, and the lower 2 bits of the binary number are left as they are, and the calculation can be easily performed from the image formation start page and the number of image formation pages of this document.

According to the invention of claim 17, claim 1
In the double-sided image forming method of the original document according to 1, 14, 15 or 16, a rear surface discharging unit for reversing and discharging the sheet is provided, and an image of the double-page spread original document is read to form page image information on the front surface of the sheet. Since the paper is reversed and re-fed, the page image information is formed on the back side of this paper, and the paper on which the image of the final page is formed only on the front side is discharged with the back side facing up The forming process can be omitted, the sheets can be quickly discharged in page order, and the image forming time can be shortened.

According to the eighteenth aspect of the present invention, in the main document image forming method of turning the pages of the main document and reading the main document to form a read image on a sheet, a two-page spread of the main document is read by reading an image of the two-page spread original. Since the image information of two pages is formed on the sheet and the half surface of the first sheet and / or the final sheet is a blank image, unnecessary information is not added to the sheet for image formation.

According to the nineteenth aspect of the present invention, in the original document image forming method of turning the pages of the original document and reading the original document to form a read image on a sheet, a two-page spread of the original document is read by reading the image of the two-page spread original document. The image information of two pages is formed on the paper, the image formation start page of this original is designated, and when this designation is the spread right page, the left side of the first sheet becomes a blank image, so that the image formation of unnecessary portions is prevented. An image-formed product that is easy to see can be obtained without being processed.

According to the twentieth aspect of the invention, in the method of forming an image of the original document for turning the pages of the original document and reading the original document to form a read image on a sheet, the image of the two-page spread original document is opened and the two-page spread of the original document is opened. When the image information of two pages is formed on a sheet, the number of image forming pages and the image forming start page of this document are designated, and when the designation of the image forming start page is a spread left page and the number of image forming pages is an odd number, and / Or the right side of the final sheet is a blank image when the image formation start page is a spread right page and the number of image formation pages is an even number. Obtainable.

[Brief description of drawings]

FIG. 1 is a block diagram showing a data processing block of an example of a system to which the present invention is applied.

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

FIG. 3 is a circuit diagram showing a read image data amplifier circuit in the same TPS.

FIG. 4 is a diagram showing a transition of a left end portion of the original document which is displaced by turning pages of a scanning unit in the TPS.

FIG. 5 is a diagram showing a transition of a left end portion of the main document which is displaced by the page turning of the scanning unit in the TPS when the main document binding portion is moved.

FIG. 6 is a diagram showing a transition of a left end portion of the original document which is displaced by the page turning of the scanning unit in the TPS when the original document binding portion is thin.

FIG. 7 is a waveform diagram showing the read data at the end of the original document of the scanning unit.

FIG. 8 is a partially enlarged side view of the edge of the original document.

FIG. 9 is a timing chart showing a timing of a main document mode operation at the time of first scanning in the spread output / 1to1 copy mode in the TPS.

FIG. 10 is a timing chart showing a timing of main document mode operation during spread output / 1to1 copy mode continuous scanning in the same TPS.

FIG. 11 is a timing chart showing the timing of main document mode operation in independent page output / 1 to 1 copy mode in the same TPS.

FIG. 12 is a timing chart showing the timing of main document mode operation in independent page output / two-copy mode in the same TPS.

FIG. 13 is a timing chart showing the timing of the original document double-sided mode operation in the same TPS.

FIG. 14 is a timing chart showing the timing of main document mode operation in the 1 to 1 high-speed double-sided mode in the same TPS.

FIG. 15 is a block diagram showing a circuit configuration of the system.

FIG. 16 is a side view schematically showing a document table unit in the TPS.

FIG. 17 is a plan view showing the outline of a document placing table in the TPS.

FIG. 18 is a perspective view schematically showing a size stopper that positions the left and right document trays of the document tray unit according to the size of a document.

FIG. 19 is a plan view showing the outline of the size stopper.

FIG. 20 is a perspective view schematically showing a unit opening / closing lock mechanism for opening / closing the scanner unit with respect to the original table unit of the TPS.

FIG. 21 is a side view schematically showing the unit opening / closing lock mechanism.

FIG. 22 is a perspective view showing a document table pressure fixing switching device in the document table unit.

FIG. 23 is a cross-sectional view showing an outline of the platen plate pressure fixation switching device.

FIG. 24 is a perspective view showing a component of the platen pressurization fixing switching device.

FIG. 25 is a perspective view showing an outline of a drive unit of the platen pressurization / fixing switching device.

FIG. 26 is a plan view showing an outline of the platen plate pressure fixation switching device.

FIG. 27 is a schematic cross-sectional view showing an overall configuration of a device body in the TPS.

FIG. 28 is a side view showing an outline of a document table lower retracting operation in the TPS.

FIG. 29 is a timing chart showing the timing of a downward retracting operation of the document table in the TPS.

FIG. 30 is a diagram showing a transition of the scanning unit at the home position in the pressure / fixing operation mode of the document table.

FIG. 31 is a diagram showing a transition at the image reading start position of the scanning unit in the pressure / fixing operation mode of the document table.

FIG. 32 is a diagram showing a transition at a main document center point of the scanning unit in the pressure / fixing operation mode of the document table.

FIG. 33 is a diagram showing a transition during the image reading of the right page of the original document or the right page turning of the scanning unit in the pressure / fixing operation mode of the original table.

FIG. 34 is a diagram showing a transition at the image reading completion position or the page turning start position of the scanning unit in the pressure / fixing operation mode of the document table.

FIG. 35 is a timing chart showing the operation timings of the scanner motor and the left and right document table raising / lowering motors in the pressure / fixing operation mode of the document table.

FIG. 36 is a schematic plan view showing a drive mechanism of a scanning unit in the scanner unit.

FIG. 37 is a sectional view schematically showing a scanning unit in the scanner unit.

FIG. 38 is a schematic sectional view showing the structure of the sheet winding roller of the scanning unit.

FIG. 39 is a schematic side view showing a drive mechanism of a sheet winding roller and a turning roller of the scanning unit in the scanner unit.

FIG. 40 is a schematic cross-sectional view showing the positional relationship between the document pressing roller and the platen glass of the image reading section in the scanning unit.

FIG. 41 is a schematic cross-sectional view showing the positional relationship between the platen glass and the glass holder of the image reading section in the scanning unit.

FIG. 42 is a side view schematically showing a switching mirror driving means and an optical path adjusting means for switching the optical path of the scanning optical system in the scanning unit from the main document scanning side to the sheet original scanning side.

FIG. 43 is a cross-sectional view showing an outline of the scanning unit in a state where the switching mirror is driven to switch the optical path of the scanning optical system in the scanning unit from the main document scanning side to the sheet material document scanning side.

FIG. 44 is a cross-sectional view schematically showing a scanning unit showing another driving means of the switching mirror.

FIG. 45 is a cross-sectional view showing an outline of a main part of a scanning unit, showing a page turning operation of the scanning unit in the TPS.

FIG. 46 is a diagram showing a transition at the left page image reading position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 47 is a diagram showing a transition at the right page image reading completion position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 48 is a diagram showing a transition at the right page-turn-up start position of the scanning unit in the page-turning operation mode of the scanning unit.

FIG. 49 is a diagram showing a transition in the middle of right page turning of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 50 is a diagram showing a transition at the right page turning end position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 51 is a diagram showing a transition of the scanning unit in the course of discharging the right page in the page turning operation mode of the scanning unit.

FIG. 52 is an explanatory diagram of charging timing of the image reading unit and the turning belt at the right page image reading completion position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 53 is a schematic side view showing a support structure of the scanning unit with respect to the scanner unit.

FIG. 54 is a schematic side view showing a relationship between a scanning rail and a pressing roller of a supporting mechanism of the scanning unit with respect to the scanner unit.

FIG. 55 is a schematic perspective view for explaining the positional relationship between the turning belt and the page feed roller in the scanning unit.

FIG. 56 is a schematic side view showing a contact state of the page feed roller with respect to the turning belt of the scanning unit.

FIG. 57 is a schematic side view showing a state in which the page feeding roller is retracted from the turning belt by a toggle joint device that drives the page feeding roller in association with the operation of the turning belt in the scanning unit.

FIG. 58 is a schematic side view showing a state in which the page feed roller is brought into contact with the turning belt by the toggle joint device.

FIG. 59 is a diagram showing read data for the original document by the reading sensor in the TPS.

FIG. 60 is a block diagram showing an end image detection circuit of the main document in the sub-scanning direction of the TPS.

FIG. 61 is a block diagram showing an end image detection circuit of the main document in the main scanning direction of the TPS.

FIG. 62 is a plan view showing an example of setting an original document of the TPS.

FIG. 63 is a side view showing a main document page storage detection unit of the TPS.

FIG. 64 is a plan view showing a part of a state where the TPS main document is set.

[Fig. 65] Fig. 65 is a diagram illustrating read data of the original document by the reading sensor.

FIG. 66 is a diagram showing read data for the original document by the reading sensor.

67 is a plan view showing a part of the operation unit in the system. FIG.

FIG. 68 is a plan view showing another part of the operating portion of the system.

FIG. 69 is a diagram showing a page image range of a read spread book original of the system.

FIG. 70 is a diagram showing a page image layout in a main document image reference mode of the system.

71 is a diagram showing another page image layout in the main document image reference mode of the system. FIG.

FIG. 72 is a diagram showing another page image arrangement in the original document image reference mode of the system.

FIG. 73 is a diagram showing another page image layout in a book document image reference mode of the system.

FIG. 74 is a time chart showing the copy operation timing in the main document copy mode of the system.

FIG. 75 is a time chart for explaining a reading sub-scanning direction range of a main document image of the system and an arrangement method thereof.

FIG. 76 is a time chart for explaining a reading sub-scanning direction range of the original document image and the arrangement method thereof in the system.

77 is a time chart for explaining a reading sub-scanning direction range of a main document image of the system and a layout method thereof. FIG.

FIG. 78 is a time chart for explaining a reading sub-scanning direction range of the original document image and the arrangement method thereof in the system.

FIG. 79 is a cross-sectional view showing an image forming unit of the system.

FIG. 80 is a cross-sectional view showing a normal paper discharge mode of the reversing unit of the system.

81 is a cross-sectional view showing the inversion unit in the sort mode. FIG.

82 is a cross-sectional view showing the double-sided copying mode of the reversing unit. FIG.

FIG. 83 is a cross-sectional view showing a reverse sheet ejection mode of the reverse unit.

FIG. 84 is a time chart showing the operation timing of the system.

FIG. 85 is a time chart showing another operation timing of the system.

FIG. 86 is a time chart showing another operation timing of the system.

FIG. 87 is a time chart showing another operation timing of the system.

88 is a time chart showing another operation timing of the unit. FIG.

89 is a time chart showing another operation timing of the system. FIG.

FIG. 90 is a diagram showing a display of an operation unit of the system.

FIG. 91 is a flow chart showing a part of a two-sided original copy selection flow of the system.

FIG. 92 is a flowchart showing another part of the two-sided original copy selection flow of the system.

FIG. 93 is a flowchart showing a part of a double-sided blank page mode flow of the system.

FIG. 94 is a flowchart showing another part of the double-sided blank page mode flow of the system.

FIG. 95 is a flowchart showing another portion of the double-sided blank page mode flow of the system.

96 is a flow chart showing a half-side blank sheet mode flow of the above system. FIG.

[Explanation of symbols]

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

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04N 1/04 107 B 7251-5C // G03B 27/62 8106-2K

Claims (20)

[Claims] 1. A book document image forming apparatus for turning a page of a book document to read a book document to form a read image on a sheet, wherein a first double-sided image is formed on the front and back sides of a sheet of a book document. An original document double-sided image forming apparatus comprising image forming means and second double-sided image forming means for forming an image of a two-page spread of the original document on the front and back sides of a sheet. 2. A book document image forming method for turning a page of a book document to read a book document to form a read image on a sheet, wherein an image of a spread book document is read, and read image information is stored in a storage means. After forming the image information of the right page of the double-page spread original from the means on the front surface of the paper, turn the pages of the main paper, reverse the front and back of the paper, and re-feed the paper to read and read the image of the double-page spread original. A double-sided original image forming method for a book original, characterized in that the image information is stored in a storage means, and the image information of the left page of the spread book original from the storage means is formed on the back surface of the sheet. 3. A book document image forming method for turning a page of a book document to read a book document to form a read image on a sheet, wherein an image of a spread book document is read, and read image information is stored in a storage means, and this storage is performed. After the image information of the left page of the double-page spread original from the means is formed on the front surface of the paper, the pages of the main paper are turned over, the front and back sides of the paper are inverted and re-fed, and the double-page spread original from the storage means is stored. A double-sided image forming method for a document, comprising forming the image information of the right page on the back side of the sheet. 4. In a method of forming an image of a book original by turning a page of the book original and reading the book original to form a read image on a sheet, an image formation start page of a spread book original is designated by an image formation start page designating means. When the designation of the image formation start page designating means is the right spread page, one front and back image of the original is formed on the front and back sides of the paper, and when the designation of the image formation starting page designating means is the spread left page A double-sided image forming method for a document, comprising forming a two-page spread image on both sides of a sheet. 5. The double-sided original image according to claim 4, wherein the image layout mode on both sides of the sheet is automatically selected by designating the image formation start page of the double-page spread original. Forming method. 6. A warning for displaying a warning when a two-page spread image of a main document is formed on the front and back sides of a sheet in a main document image forming apparatus for turning the pages of the main document to form a read image on a sheet. A two-sided document image forming apparatus of the present document, which is provided with a display means. 7. A book document image forming apparatus for turning a page of a book document to read a book document to form a read image on a sheet, and an image formation start page designating unit for designating a page to start image formation of a spread book document. In a double-sided image forming mode for forming an image from the first side of the book, a warning display means for displaying a warning when the spread left page of the original is designated by the image formation start page designating means. Document double-sided image forming apparatus. 8. A method for forming an image of a book original, which comprises turning a page of the book original and reading the book original to form a read image on a sheet, wherein an image of a two-page spread of the book original is read and read image information is stored in a storage means. After the image information of the two-page spread from the storage means is formed on the front surface of the sheet, the front and back sides of the sheet are reversed and re-fed to turn the pages of the original document, and the image of the two-page spread of the original document is displayed. A two-sided image forming method for a document, comprising reading and storing read image information in a storage means, and forming image information of a two-page spread from the storage means on the back surface of the sheet. 9. A book document image forming apparatus for turning a page of a book document to read a book document to form a read image on a sheet, and a double-sided image forming means for reading an image of the book document to form the front and back sides of the sheet. A two-sided original image forming apparatus for a document, comprising a page designating unit for designating an image forming page of a document, and a blanking unit for rendering a front side of a first sheet and a back side of a final sheet as blank images. 10. After reading the image of the double-page spread of the original document and forming the image information of the right page of the double-page spread original on the surface of the sheet, the page of the original document is turned over and the front and back sides of the sheet are reversed and re-supplied. Double-sided image forming means for forming an image on the double-page spread of the main document and forming the image information of the left page of the double-page spread original on the back side of the paper, and image formation start for designating the image formation start page of the double-page spread original. A double-sided image forming apparatus for a document, comprising a page designating means and a blanking means for rendering the front surface of the first sheet a blank image when the designation of the image forming start page designating means is a spread left page. 11. After reading the image of the double-page spread of the original document and forming the image information of the right page of the double-page spread original on the surface of the sheet, the page of the original document is turned over, the front and back sides of the sheet are reversed, and the sheet is re-fed. Double-sided image forming means for forming an image on the double-page spread of the main document and forming the image information of the left page of the double-page spread original on the back side of the paper, and image formation start for designating the image formation start page of the double-page spread original. When the page designation means and the designation of the image formation start page designation means are spread left pages and the number of image formation pages of the original is an even number, and / or the designation of the image formation start page designation means is spread right page. A double-sided document image forming apparatus according to the present invention, further comprising: a blanking unit that forms a blank image on the back surface of the final sheet when the number of image forming pages of the original document is odd. 12. A method for forming an image of a book document by turning a page of the book document and reading the book document to form a read image on a sheet, wherein an image of a spread book document is read to obtain image information of a left page of the book spread document. Form on the front side, reverse the front and back of this paper and re-feed, form the image information of the right page of the double-page spread original on the back side of the paper, and specify the image formation start page of the double-page spread original A two-sided image forming method for a document, wherein the front side of the first sheet is set to a blank image when the image forming start page designating means is a spread right page. 13. A double-sided image forming method for a book original according to claim 10 or 12, further comprising rear surface discharging means for reversing and discharging the paper, and reading the image of the spread book original to form page image information on the front surface of the paper. Then, the sheet is reversed and re-fed, the page image information is formed on the back side of the sheet, and the sheet on which the image of the first page is formed only on the front side is discharged with the front side facing up. This document double-sided image forming method. 14. A book original image forming method for turning a page of a book manuscript and forming a read image on a sheet by reading the book manuscript, wherein the image information of the left page of the book spread manuscript is read on a sheet. Form on the front side, reverse the front and back of this paper and re-feed, form the image information of the right page of the double-page spread original on the back side of the paper, and specify the image formation start page of the double-page spread original And the number of image forming pages of the original is designated by the image forming page number designating means, the designation of the image forming start page designating means is a spread left page, and the designation of the image forming page number designating means is an odd number. And / or when the designation of the image forming start page designating means is a spread right page and the designation of the image forming page number designating means is an even number, the back surface of the final sheet is a blank image. Double-sided image forming method for originals. 15. A method for forming an image of a book original, which is obtained by turning a page of the book original to read the book document and forming an image on a sheet. The sheet is formed on the front side, the front and back sides of this sheet are reversed and re-fed, the image information of the two-page spread original is read, and the image information of the two-page spread of the main document is formed on the back side of the sheet. A double-sided image forming method for a document, wherein the back side of the final sheet is a blank image when the number is odd. 16. A method for forming an image of a book document by turning a page of the book document to read a book document to form a read image on a sheet, wherein an image of a spread book document is read to obtain image information of a spread page of the book document. Form on the front side, reverse the front and back of this paper and re-feed the paper, read the image information of the double-page spread original and form the image information of the double-page spread of the main page on the back side of the sheet, and form the image of the main page. When the start page and the number of image forming pages are specified, the number of image forming pages is divided by 4, and the remainder is 0 or 3, and the image forming start page is the left page, and / or the number of image forming pages is 4. The original document double-sided image forming method, wherein when the image formation start page is the right page, the back side of the final sheet is a blank image when the remainder is 1 or 2, 17. A double-sided image forming method for a book original according to claim 11, 14, 15 or 16, further comprising rear surface discharging means for reversing and discharging the paper, and reading the image of the two-page spread book original to print page image information. On the front side of this paper, reverse this paper and re-feed it, form page image information on the back side of this paper, and discharge the paper with the back side facing up with the image of the last page formed only on the front side A method of forming a double-sided image on the original document. 18. A method for forming an image of a book original, which comprises turning a page of the book original and reading the book document to form a read image on a sheet. A method for forming a document image, comprising forming a blank sheet image on a half surface of the first sheet and / or the final sheet formed. 19. A method for forming an image of a book document, which comprises turning a page of the book document to read the book document to form a read image on a sheet, wherein an image of the book spread document is read and the image information of the spread page of the book document is printed on a sheet. A method for forming an image of an original document, comprising forming and designating an image formation start page of the original document, and making the left side of the first sheet a blank image when the designation is a spread right page. 20. In a method of forming an image of a book original by turning a page of the book original and reading the book original to form a read image on a sheet, the image of the book spread two-page original is read and the image information of the page spread of two pages of the book original is printed on a sheet. Forming, specifying the number of image forming pages and the image forming start page of the original, when the image forming start page is a spread left page and the number of image forming pages is an odd number, and / or the image forming start page is specified. Is a double-page spread right page and the right side of the final sheet is a blank image when the number of image forming pages is an even number.