JPH07170389A - Original book image forming device and method therefor - Google Patents

Abstract

PURPOSE:To never copy the images outside the pages of an original book regardless of the changes of a page size and a page location by deleting the image of the frame part of a page by the page reference of the original book. CONSTITUTION:The original book end part image detection circuit within an IPU 103 performs continuous samplings for read data in the sub-scanning direction of a specified picture element, compares the data with a threshold and defines a location where a large picture element is repeated several number of times as a sub-scanning direction page end part. The IPU 103 calculates a page absorption and rising location from this page end location, scans a reading unit 200 up to the location and stops the scanning. The start and termination of the detection circuit is instructed by the microcomputer incorporated in the IPU 103, the scanning location of the unit 200 is controlled, and the detection of the original book end part in the main scanning direction of the detection circuit is performed, referring to the picture element counter in the main scanning direction. Further, in this microcomputer, an original book main scanning direction end part image detection signal is used for the determination of the main scanning direction valid image range of the original book of a non-standard size, the image outside a range is automatically deleted and treated at the time of copying and a useless image is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a copying machine, a facsimile,
The present invention relates to a book document image forming apparatus and method such as a printer.

[0002]

2. Description of the Related Art Conventionally, there are page turning devices for this manuscript,
There are few book manuscript copying apparatuses that automatically copy the book manuscript, and there is no one that automatically erases the image of the book manuscript. 2. Description of the Related Art Conventionally, some copying machines have a function of detecting a size of a sheet document and selecting a sheet or a copy magnification, and a document free setting function of detecting a mounting position of the sheet document and aligning an image registration. In addition, the copying machine has a function of erasing the image around the transfer paper based on the size of the transfer paper (frame erasing function), erasing the center of the transfer paper (center erasing), and erasing a designated area on the coordinates (area Some have a function of erasing the inside of the document) and erasing the original image of the area designated by the marker (erasing inside the marker). However, there is no copying machine that automatically erases the frame portion on the basis of the document size, and there is no one that erases the image of the binding portion according to the binding portion position of the original document.

[0003]

Many of the books and books that are generally issued are of a size other than the standard size such as copy paper such as A series and B series, and the length and width of the page and the ratio thereof. Is not constant. Further, even if the cover size of the main document is a standard size, the page size of the double-page spread original is reduced in the page spread direction due to the binding margin and distortion of the binding portion. Further, the original document may be skewed because the image may be displaced depending on the setting position at the time of copying, or may be bent and set in the reading scanning direction.

This occurs not only when reading a document on a document table in the related art, but also when the document is copied by the document copying apparatus due to a change in page position due to setting and turning of the document. Therefore, in the above copying machine, the image outside the page of the original document is often copied in black, resulting in unsightly copying and wasting toner. Moreover, the page image of the original document may be missing when the frame is erased and the center is erased.

Many of the books and books that are generally issued are not of a fixed size, and the length and width of the page and the ratio thereof are not constant, and the thickness of the book depends on the number of book pages. However, the spread of the original document differs depending on the paper quality and binding method of the original document. Therefore, in the above copying machine, the double-page spread original document has its binding portion projected out of focus from the image forming surface during copying, the original illumination light is difficult to reach, and the image surface is oblique to the optical path. As a result, the reflected light is reduced, so that the image of the binding portion is shaded. Further, when the image portion is hung on the binding portion in order to scan the image plane at the same size, the binding portion is shrunk in the page spread direction due to the distortion. This occurs to some extent depending on the type of the original document, not only when the original document is read on the original plate but also when the original document is copied by the original document copying apparatus. Therefore, the image of the binding portion of the original document is dark, specifically, the background portion is dirty and the character portion is thick in many cases to be copied, resulting in unsightly copying and wasting toner. Moreover, the page image of the original document may be missing when the frame is erased and the center is erased.

Further, the image range of spread pages of generally published books and books is often other than the standard size, and the spread state of this document differs depending on the thickness of the document, paper quality and binding method. Further, the image range varies depending on the original document, and there is a difference in the distance from the page edge portion of the original document and the distance from the binding portion. Therefore, in the above copying machine, when the original document is copied, the peripheral portion of the page becomes black or the binding portion has a shadow, resulting in unsightly copying and wasting toner. These largely depend on the type of the original document, and the black portion around the page and the shadow of the binding portion have no correlation and may occur singly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a document image forming apparatus and method capable of improving the above-mentioned drawbacks, preventing unsightly images from being formed, and eliminating missing page images.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is a book document image forming apparatus for reading a book document and forming an image of a read page. It is provided with a detecting means for detecting the position and an outer frame portion image erasing means for erasing so as not to form an image of the outer frame portion of the page by an output signal of the detecting means.

According to a second aspect of the present invention, in a main document image forming apparatus for reading a main document and forming an image of a read page, a detecting unit for detecting a page edge of the main document and an output signal of the detecting unit are used. A page end image erasing means for erasing without forming an image of an area of a predetermined width inside the page edge with respect to the upper edge of the page, the lower edge of the page, the left edge of the page, and the right edge of the page as a reference, respectively. Be prepared.

According to a third aspect of the present invention, a reading unit for reading the main document, an image forming unit for forming an image of a page read by the reading unit, and a page of the main document are adsorbed to a predetermined page storage unit. In the original document image forming apparatus having page turning means for storing and discharging the page from the page storing section to turn the page, and page detecting means for detecting the page storing timing and the page discharging timing of the page storing section, The right edge and the left edge of the page of this document are detected by the page storage timing and the page discharge timing detected by the page detection means, and the predetermined area at the right edge and the left edge of the double-page spread original is erased so as not to form an image. A page edge portion image erasing unit is provided.

According to a fourth aspect of the present invention, in the original document image forming apparatus according to the third aspect, the page edge image erasing means detects the right edge portion and the left edge portion of the original document every time the page of the original document is turned. Then, the image erasing areas at the right end and the left end of the page of the two-page spread original are determined.

According to a fifth aspect of the present invention, in a main document image forming apparatus for scanning and reading a main document to form an image of a read page, an image in the direction toward the upper edge of the page of the double-page spread original is read from the read data of the double-page spread original. An image erasing unit is provided for detecting the range, determining the image erasing region at the upper end of the page of the two-page spread original from this image range, and erasing so as not to form an image in the image erasing region.

According to a sixth aspect of the present invention, in the main document image forming apparatus according to the fifth aspect, the page upper end erasing means detects the image range in the upper edge direction of the spread main document, and scans the two-page spread main document for scanning. Is the first time.

The invention according to claim 7 is the invention as claimed in claim 1,
In the original document image forming apparatus described in 3, 4, 5 or 6, the image erasing area is a uniform strip-shaped area parallel to each page end direction of the original document.

According to an eighth aspect of the present invention, in a book document image forming apparatus for reading a spread book document placed with the lower end of the page as a reference and forming a read image, it is arbitrarily set from the reference of the spread book document. And an erasing means for erasing so that the image at the lower end of the page having a different width is not formed.

According to a ninth aspect of the present invention, in a main document image forming apparatus that scans and reads a main document to form an image of a read page, a detecting unit that detects a binding portion position of a double-page spread original document, and the detecting unit. And a binding portion image erasing means for erasing the image at the binding portion position of the two-page spread original document in accordance with the output signal.

According to a tenth aspect of the present invention, in a main document image forming apparatus for scanning and reading a main document to form an image of a read page, a detecting means for detecting a spread page joining position of a two-page spread original document, and this detection. And an erasing means for erasing so as not to form images of the same width on the left and right pages of the original document based on the spread page joining position detected by the means.

According to an eleventh aspect of the present invention, in the main document image forming apparatus according to the eighth, ninth or tenth aspect, the spread main document is placed vertically in the scanning direction, and the image erasing area of the main document is the main document. To form a uniform strip-shaped region parallel to the direction of the closed portion.

According to a twelfth aspect of the present invention, in a book document image forming apparatus for scanning and reading a book document to form an image of a read page, binding is performed so as not to form an image at the binding portion position of a two-page spread book document. The partial image erasing means and the erasing width setting means for setting the image erasing width of the binding portion image erasing means are provided. The setting of the image erasing width by the erasing width setting means gives an instruction with reference to a two-page spread original document. is there.

According to a thirteenth aspect of the present invention, in a book document image forming apparatus for reading a book document and forming an image of a read page, a binding portion image erasing means for erasing without binding the image of the binding portion of the spread book document. And a page peripheral portion image erasing means for erasing the image of the page peripheral portion of the two-page spread original so as not to form an image, and setting of the binding portion image erasing of the binding portion image erasing means and the page peripheral portion image erasing means. This is independent of the setting for erasing the image around the page.

According to a fourteenth aspect of the present invention, in a book document image forming apparatus for reading a book document and forming an image of a read page, a binding portion image erasing means for erasing without binding the image of the binding portion of a spread book document. An image erasing setting means for setting the binding portion image erasing of the binding portion erasing means, a designation means for designating the binding portion image erasing of the binding portion image erasing means by default, and a binding portion image erasing by the designation means. And a canceling means for canceling the designation.

According to a fifteenth aspect of the present invention, in a main document image forming apparatus for reading a main document and forming an image of a read page, a peripheral image of a page is erased so as not to form an image of the peripheral part of a two-page spread original. Erasing means, image erasing setting means for setting image erasing of the page peripheral portion of the page peripheral portion image erasing means, designation means for designating erasing of the page peripheral portion image of the page peripheral portion image erasing means by default, and this designation And a canceling means for canceling the designation of erasing the image around the page by the means.

According to a sixteenth aspect of the present invention, in a book document image forming apparatus for reading a book document and forming an image of a read page, an image forming means for forming the left and right page images of the book spread original page by page, and a spread page. A binding portion image erasing means for erasing the binding portion image of the original document without forming an image, a binding portion image erasing setting means for setting the binding portion image erasing of the binding portion erasing means, and a page peripheral portion of the double-page spread original document. An image erasing means for erasing the peripheral portion of the page for erasing without forming an image, and erasing the image for the peripheral portion of the image of the peripheral portion image erasing means are set, and the image forming means forms the images of the left and right pages of the two-page spread original document for each page In this case, a page peripheral image erasure setting means for setting the right edge of the left page and the left edge of the right page of the two-page spread original is provided.

According to a seventeenth aspect of the present invention, there is provided a reading means for reading the original document, a storage means for storing the image data read by the reading means, and an image forming means for reading the image data from the storage means to form an image. , Binding part image erasing means for erasing the image of the binding part of the two-page spread original document, binding part image erasing setting means for setting the binding part image erasing of the binding part erasing means, and the page periphery of the two-page spread original document A page peripheral image erasing means for erasing so as not to form an image on a page, and a page peripheral image erasing setting means for setting the page peripheral image erasing of the page peripheral image erasing means, Alternatively, it is possible to set and cancel the image deletion after reading.

According to an eighteenth aspect of the present invention, in a book document image forming apparatus for reading a book document and forming an image of a read page, a binding portion image erasing means for erasing without binding an image of a binding portion of a spread book document. And a page peripheral image erasing means for erasing so as not to form an image of the page peripheral portion of the two-page spread original document, binding portion erasing width varying means for varying the erasing width of the binding portion image, and the page peripheral portion image And an erasing width changing means for changing the erasing width.

According to a nineteenth aspect of the present invention, in the document image forming apparatus according to the seventeenth or eighteenth aspect, the set value of each erasing width at the default is set to 2 mm or more.

According to a twentieth aspect of the present invention, in a book document image forming apparatus for reading a book document and forming an image of a read page, a binding portion image erasing means for erasing without binding an image of a binding portion of a spread book document. A first erasing width setting means for setting a binding portion image erasing width of the binding portion erasing means; a page peripheral portion image erasing means for erasing so as not to form an image of a page peripheral portion of a two-page spread original document; Second erasing width setting means for setting an image erasing width at the upper end of the page of the peripheral image erasing means, and third erasing width setting means for setting an erasing width of an image at the lower end of the page of the peripheral image erasing means And a fourth erasure width setting means for setting a right page right edge image erasure width and a left page left edge image erasure width of the page peripheral image erasure means, and each erasure width is independently set. is there.

According to a twenty-first aspect of the present invention, there is provided a reading means for reading the original document, a storage means for storing image data read by the reading means, and an image forming means for reading image data from the storage means to form an image. , A binding portion image erasing means for erasing a binding portion of a double-page spread original so as not to form an image, binding portion image erasing width setting means for setting a binding portion image erasing width of the binding portion erasing means, and a double-page spread original document A page periphery image erasing means for erasing without forming an image of the page periphery, and a page periphery image erasing width setting means for setting a page periphery image erasing width of the page periphery image erasing means, The image erasing width can be set and changed during or after the reading of the original document.

According to a twenty-second aspect of the present invention, there is provided reading means for reading the original document, image forming means for forming an image of the read page on the image receiving member, and detecting means for detecting the page size and page position of the original document. Then, in the original document image forming apparatus that reads the original document and erases it so as not to form an image outside the page range that is normally detected by the detecting unit, in the image receiving member regardless of the page size detected by the detecting unit. A setting means for forming an image on the entire surface is provided.

According to the twenty-third aspect of the present invention, the reading means for reading the main document, the image forming means for forming the image of the read page on the image receiving member, and the binding for erasing so as not to form the image of the binding portion of the two-page spread original document. Partial image erasing means, binding portion image erasing setting means for setting binding portion image erasing of the binding portion erasing means, and page peripheral portion image erasing means for erasing without forming an image of the page peripheral portion of the two-page spread original document. In the original document image forming apparatus having a page periphery image deletion setting unit for setting the page periphery image deletion of the page periphery image deletion unit and a setting unit for forming an image on the entire surface of the image receiving member,
The setting for image formation on the entire surface of the image receiving member is validated when the setting for erasing the image of the binding portion and the setting for erasing the image of the peripheral portion of the page are released.

According to a twenty-fourth aspect of the present invention, in the original document image forming apparatus according to the twenty-third aspect, the standard erasing means erases images so that an image outside the page range is not formed.

According to a twenty-fifth aspect of the present invention, in a main document image forming apparatus for reading a main document and forming an image of a read page, a detecting unit for detecting the page size and page position of the main document, and the detecting unit for detecting. And an erasing means for erasing so as not to form an image outside the specified page range.

According to a twenty-sixth aspect of the present invention, there is provided a main document image forming method for reading a main document, forming an image of a read page, and turning a page of the main document, wherein the main document is read and read image data is stored. Stored in the means, turn the pages of the original document, detect the page size and position when turning the pages, read the image data from the storage means, and read the read image data based on the detection result and the binding portion and page of the original document. The image data at the end is erased, and an image is formed by the read image data after the erasure.

[0034]

According to the present invention, the page size and the page position of the original document are detected by the detecting means, and the page outer frame image erasing means does not form the image of the outer frame portion of the page by the output signal of the detecting means. To erase.

According to the second aspect of the present invention, the page edge of the original document is detected by the detecting means, and the page edge image erasing means outputs the signal from the detecting means to the upper edge of the page, the lower edge of the page, and the page. The left edge portion and the right edge portion of the page are erased so as not to form an image of an area having a predetermined width inside the edge portion of the page, respectively.

According to the third aspect of the invention, the page edge image erasing means detects the right edge portion and the left edge portion of the original document according to the page storage timing and the page discharge timing detected by the page detection means, and the spread original document sheet. The predetermined areas at the right end and the left end of the page are erased so as not to form an image.

According to a fourth aspect of the present invention, in the original document image forming apparatus according to the third aspect, the page edge image erasing means detects the page right edge portion and the page left edge portion of the original document every time the page is turned. Then, the image erasing areas at the right end and the left end of the page of the two-page spread original are determined.

According to the fifth aspect of the invention, the page top edge image erasing means detects the image range in the direction toward the top edge of the page of the two-page spread original document from the read data of the two-page spread original document, and the page of the two-page spread original document is detected from this image range. The image erasing area at the upper end is determined and the image in the image erasing area is erased so as not to be formed.

According to a sixth aspect of the present invention, in the original document image forming apparatus according to the fifth aspect, the page upper end erasing means detects the image range in the upper edge direction of the two-page spread original document and scans the two-page spread original document for scanning. Do it the first time.

According to the invention described in claim 7, claims 1, 2,
In the original document image forming apparatus described in 3, 4, 5 or 6, the image erasing area is a uniform strip-shaped area parallel to the page end direction of the original document.

According to the eighth aspect of the invention, the erasing means erases so as not to form an image at the bottom end of the page having a width arbitrarily set based on the reference of the two-page spread original.

According to the ninth aspect of the invention, the binding portion position of the double-page spread original document is detected by the detection means, and the binding portion image erasing means does not form an image of the binding portion position of the double-page spread original document by the output signal of the detection means. To erase.

According to the tenth aspect of the present invention, the spread page joint position of the spread book original is detected by the detecting means, and the erasing means detects the spread page joint position detected by the detecting means as a reference and the left and right pages of the original document have the same width. Erase without forming an image.

According to the eleventh aspect of the present invention, the eighth and ninth aspects are provided.
Alternatively, in the book document image forming apparatus described in Item 10, the spread book document is placed perpendicularly to the reading scanning direction, and the image erasing area of the book document is a uniform strip-shaped area parallel to the closing direction of the book document.

According to the twelfth aspect of the present invention, the binding portion image erasing means erases so as not to form an image at the binding portion position of the two-page spread original document, and the erasing width setting means sets the image erasing width of the binding portion image erasing means. To do. In the setting of the image erasing width by the erasing width setting means, the spread original document is designated as a reference.

According to the thirteenth aspect of the present invention, the binding portion image erasing means erases so as not to form an image of the binding portion of the spread book document, and the page peripheral portion image erasing means erases the image of the page peripheral portion of the spread book document. Erase so that it does not form. The setting for erasing the binding portion image by the binding portion image erasing means and the setting for erasing the page peripheral portion image by the page peripheral portion image erasing means are independent.

According to the fourteenth aspect of the invention, the binding portion image erasing means erases so as not to form an image of the binding portion of the two-page spread original, and the binding portion image erasing of the binding portion erasing means is set by the image erasing setting means. To be done. In the default state, the binding portion image erasing of the binding portion image erasing means is designated by the designating means, and the designation of the binding portion image erasing by the designating means is canceled by the canceling means.

According to the fifteenth aspect of the present invention, the page peripheral portion image erasing means erases so as not to form an image of the page peripheral portion of the two-page spread original, and the page peripheral portion image erasing by the page peripheral portion image erasing means produces an image. It is set by the erase setting means. In the default state, the page peripheral portion image erasing of the page peripheral portion image erasing means is designated by the designating means, and the designation of the page peripheral portion image erasing by the designating means is canceled by the canceling means.

According to the sixteenth aspect of the present invention, the image forming means forms the images of the left and right pages of the two-page spread original document for each page, and the binding portion image erasing means erases the images of the binding part of the two-page spread original document so as not to form them. To do. The binding portion image erasing of the binding portion erasing means is set by the binding portion image erasing setting means, and the page peripheral portion image erasing means erases so as not to form an image of the page peripheral portion of the two-page spread original document. The page periphery image erasing setting means sets the page periphery image erasing of the page periphery image erasing means, and when the image forming means forms the images of the left and right pages of the spread book original for each page, the left side of the spread book original is set. Set the right edge of the page and the left edge of the right page.

According to the seventeenth aspect of the present invention, the reading means reads the original document, and the image data read by the reading means is stored in the storage means. The image forming unit reads the image data from the storage unit to form an image, and the binding portion image erasing unit erases the binding portion of the double-page spread original document so as not to form the image. The binding portion image erasing of the binding portion erasing means is set by the binding portion image erasing setting means, and the page peripheral portion image erasing means erases so as not to form an image of the page peripheral portion of the two-page spread original document. The page periphery image deletion of the page periphery image deletion means is set by the page periphery image deletion setting means, and the image deletion can be set or canceled during or after the reading of the original document.

According to the eighteenth aspect of the present invention, the binding portion image erasing means erases so as not to form an image of the binding portion of the spread book document, and the page peripheral portion image erasing means erases the image of the page peripheral portion of the spread book document. Erase so that it does not form. The erasing width of the binding portion image is changed by the binding portion erasing width varying means, and the erasing width of the page peripheral portion image is varied by the page peripheral portion erasing width varying means.

According to the nineteenth aspect of the present invention, in the document image forming apparatus according to the seventeenth or eighteenth aspect, the set value of each erasing width in the default is set to 2 mm or more.

According to the twentieth aspect of the invention, the binding portion image erasing means erases so as not to form an image of the binding portion of the two-page spread original, and the binding portion image erasing width of the binding portion erasing means is the first erasing width. It is set by the setting means. The page peripheral image erasing means erases the image of the page peripheral portion of the two-page spread original so as not to form an image, and the image erasing width at the upper end of the page of the page peripheral image erasing means is set by the second erasing width setting means. . The image erasing width at the lower end of the page of the image erasing section of the page periphery is set by the third erasing width setting means, and the erasing width of the right edge of the right page and the left edge of the left page of the image erasing means of the page periphery are fourth. Is set by the erasing width setting means, and each erasing width is set independently.

According to the twenty-first aspect of the invention, the reading means reads the original document, and the image data read by the reading means is stored in the storage means. The image forming unit reads the image data from the storage unit to form an image, and the binding portion image erasing unit erases the binding portion of the double-page spread original document so as not to form the image. The binding portion image erasing width of the binding portion erasing means is set by the binding portion image erasing width setting means, and the page peripheral portion image erasing means erases so as not to form an image of the page peripheral portion of the two-page spread original document. The page peripheral image erasing width of the page peripheral image erasing means is set by the page peripheral image erasing width setting means, and the image erasing width can be set or changed during or after reading the main document.

In the twenty-second aspect of the present invention, the reading means reads the main document and the image forming means forms the image of the read page on the image receiving member. The page size and page position of the original document are detected by the detecting means, and are erased so that an image outside the page range normally detected by the detecting means is not formed. The setting means forms an image on the entire surface of the image receiving member regardless of the page size detected by the detecting means.

In the twenty-third aspect of the invention, the reading means reads the original document, and the image forming means forms the image of the read page on the image receiving member. The binding portion image erasing means erases the image of the binding portion of the two-page spread original so as not to form an image, and the binding portion image erasing of the binding portion erasing means is set by the binding portion image erasing setting means. The page periphery image erasing means erases the image of the page periphery of the two-page spread original so as not to form an image, and the page periphery image erasing of the page periphery image erasing means is set by the page periphery image erasing setting means. The setting means forms an image on the entire surface of the image receiving member, and the setting of image formation on the entire surface of the image receiving member becomes effective when the setting for erasing the image of the binding portion and the setting for erasing the image of the peripheral portion of the page are released.

According to the twenty-fourth aspect of the present invention, in the document image forming apparatus according to the twenty-third aspect, the erasing means normally erases the image so that an image outside the page range is not formed.

According to the twenty-fifth aspect of the present invention, the page size and page position of the original document are detected by the detecting means, and the erasing means erases so as not to form an image outside the page range detected by the detecting means.

[0059]

1 shows an example of an image forming system to which the present invention is applied. This system is a book / sheet original reading device (TPS: Turn the Page Scan).
er) is a system for outputting a document read image to an image receiving member made of transfer paper by an electrophotographic printer,
It has a scanner unit 500 for reading a document and a printer 501 for forming an image, and the scanner unit 500 has a reading carriage (scanning unit) 200 for turning and scanning the document. The scanning unit 200 includes an image reading plate (SBC) 101 having a CCD (charge coupled device) for reading a document image, and the image reading plate 10.
VPU (Video Processing Un) that processes from analog image signal from 1 to A / D conversion
It) 102, and a portion 502 that relays the signal line of the load system such as a fluorescent lamp and its inverter power source, a heater, a thermistor, a fan, a solenoid, and the wiring of the power source line. The part 502 and the VPU 102 are connected to the IPU 103 by independent flexible cables.

IPU (Image Processni)
g Unit (image processing device) 103 is a DRAM for storing a read image signal, which can be attached / detached by a connector.
IPU equipped with a frame frame 104 consisting of modules
The microcomputer in 103 is a scanning unit 200.
Motor for scanning the document and D for driving the document table
A load such as a C motor is controlled via the motor drive circuit 503, and a signal from the sensor is fetched. Printer 50
Reference numeral 1 denotes a main control plate 107 including a main control unit for controlling a copy mode, fetching a key signal from the operation unit 99, and a display control, and a sequence control unit for controlling a copy timing. The microcomputers of the control unit and the operation unit 99 mutually transmit and receive commands by serial communication. The main control board 107 includes inputs of sensors related to image formation of the printer 501, a motor,
Sequence control of image formation is performed by controlling solenoids, clutches, and the like.

FIG. 2 shows the data processing flow block of this system. This system is roughly divided into an image reading unit of TPS, an image data processing unit, and an image forming unit. The image reading plate 101 arranged at the right end of the scanning reading page turning section of the TPS is equipped with a CCD and has a VPU1.
Reference numeral 02 supplies a drive signal to the CCD based on the reference signal from the IPU 103, performs correction of 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
The bit read image data is synchronized with the clock and the gate signal in the main scanning direction, and IP is applied at a speed of about 7.5 MHz.
The data is output to the U 103, and the IPU 103 performs processing such as scaling of image data from the VPU 102 and high image quality processing of electrophotography. The IPU 103 processes the image data by γ
Gradation processing including correction is performed, converted into 4-bit dot video data suitable for writing, and the processed data is stored in the frame memory 104.

In this TPS, the reading speed of the original document is 9
0 mm / sec. , Sheet original reading scanning speed 90
mm / sec. , Image forming speed 180 mm / sec. As described above, there is a difference between the reading scanning speed and the image forming speed, and 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. Further, when the TPS independently prints the images on the left and right pages of the original document, it is possible to divide the images on the left and right pages by using the frame memory 104 by one scanning reading, and the TPS controls the image forming unit. There is no need for synchronous scanning with the image writing of the laser printer 501 that constitutes it, or for rerunning.

Further, depending on the speed correspondence of the IPU 103, the frame memory 104 of 4 bits for each dot is stored in 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. The image data input from the IPU 103 to the frame memory 104 is performed in parallel for 2 dots of the image data, and is about 3.8 MHz.
Sequentially at the speed of. On the other hand, in the image data from the frame memory 104, two dots of the image data are similarly output in parallel, and the IPU 103 is output at a speed of about 7.5 MHz.
It is sequentially output to the main control board 107 in synchronization with the clock sent from the device and the gate signals in the main scanning direction and the sub scanning direction.

The main control board 107 is the frame memory 1
The image data output from 04 at a high speed in accordance with the image forming speed of the laser printer 501 is converted into serial data of about 15 MHz, and a FIFO (First In FIRS)
t Out) memory further speeds up in the main scanning direction, about 1
Synchronize with the 8 MHz write clock. The 4-bit image data for each dot is pulse width modulated by the modulator to become light emission time data, which is transmitted to the laser (LD) controller as PWM data in synchronization with the write clock. The LD controller uses the PWM data to set L
L of electrophotographic laser printer via D driver
D105 is caused to emit light, and the photosensitive member is exposed and scanned to form an image.

The IPU 103 also controls the scanning of the TPS reading carriage 200, and drives the scanner motor 106, which is a stepping motor for scanning the reading carriage 200 at the time of reading a sheet document and the main document, to scan the reading carriage 200. Speed 90 mm / sec. Scanning at a constant speed with 71% to 14
At the time of zooming including zooming up to 1%, the reading carriage 200 is scanned at a linear velocity of 1.41 to 0.71.

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 501 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
Reference numeral 7 captures a signal from the operation unit 99 and outputs a signal to the operation unit 99.

The reading sensor 101 having a CCD is
The reflected light image of one line of the original in the main scanning direction is simultaneously read and converted into an electric signal. The electric signal from the reading sensor 101 is subjected to waveform correction such as clamping, amplification, and A / D conversion in the VPU 102, and is output to the IPU 103 as an 8-bit digital signal. IPU103 is VPU
Shading correction of the digital image signal from 102,
In addition to MTF correction, main scanning direction scaling, γ correction, image processing, high image quality processing is controlled.

Next, the TPS main document exposure method will be described. As shown in FIG. 14, the present system includes two fluorescent lamps 201 and 202 as light sources for exposing the original document and two fluorescent lamps 203 and 20 as light sources for exposing the sheet original document.
4 are provided, and the fluorescent lamps 201 and 202 and the fluorescent lamps 203 and 204 are respectively driven by inverter circuits for two lamps. Fluorescent lamps 201, 202 and fluorescent lamps 203,
Reference numeral 204 is switched on by a relay by a control signal at the time of reading the main document and at the time of reading the sheet document, and is turned on. Therefore, this device is equipped with four fluorescent lamps 201 to 204 and two fluorescent lamps.
It has two fluorescent lamp light emitting circuits. The two fluorescent lamps 201 and 202 as light sources for exposing the original document are arranged in the scanning unit 20.
The platen glass 205 is arranged at both upper ends of the platen glass 205 arranged at the main document reading slit position in the direction orthogonal to the 0 scanning direction.

These fluorescent lamps 201 and 202 expose the main document BO from the left and right sides through the platen glass 205. On the other hand, the two fluorescent lamps 203 and 204 as the light source for exposing the sheet original are respectively arranged at the sheet original reading slit position in the direction orthogonal to the scanning direction on the upper part of the scanning unit 200, and these fluorescent lamps 203 are provided. ，
204 is a contact glass 206 on the upper surface of the system.
Through the scale 2 on this contact glass 206
The sheet document SO set according to 07 is exposed from both left and right sides. The fluorescent lamps 201 to 204 are driven at a drive frequency of 40 kHz so as to prevent uneven reading density in synchronization with the sampling of reading by the CCD.

The main document end image detection circuit arranged in the IPU 103 detects the end of the main document by the change of the read information by the specific pixel of the reading sensor 101 in the sub-scanning direction. The original document edge image detection circuit samples the pixel data before the image scaling processing in the main scanning direction in the IPU 103, and determines the edge of the original document from the pixel data. The end image detection circuit of the original document is instructed by the microcomputer in the IPU 103 to start and end the edge detection of the original document. The microcomputer in the IPU 103 manages the main document edge detection in the sub-scanning direction of the main document edge image detection circuit according to the scanning position of the scanning unit 200, and refers to the main scanning direction pixel counter to determine the main document edge image. It manages the detection of the edge of the original in the main scanning direction of the detection circuit. Then, the microcomputer in the IPU 103 calculates the page suction position and the main scanning direction image range of the main document from the end position of the main document detected by the main document end image detection circuit.

Next, the structure of the document table unit in the TPS will be described. As shown in FIGS. 3 to 5, the document table 1 is formed of a resin plate having a thickness of 2 mm, and a material having a high coefficient of friction such as extremely thin rubber is attached to the upper surface of the plate. is there. This high coefficient of friction material is laminated, coated, sprayed, etc., on the original table 1
May be formed on the upper surface of. The document table 1 in this example is
The document placing surface (upper surface) is formed to have an A4 size, and one is provided on each of the left and right sides of the apparatus main body center 2. 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. . At the end of each adjusting stud 4, there is a hole into which a pin of a slider described later is fitted.

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.

Further, with the stud 12 as the center of twist, the torsion spring 13 is provided with the link plate 10 and the link arm 11.
It is hung between and, by this torsion spring 13,
In FIG. 3, 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.

The ends of the two upper and lower pedestals 5 on the side of the apparatus main body center 2 are connected to each other by a back support plate 14. The back support plate 14 is made of an elastically deformable material such as rubber, and the back cover of the 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. Further, a leaf spring 21 for pushing the scanner unit 30 upward when the scanner unit 30 is closed, and an opening / closing 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 interval 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. 5 and 6 show schematic configuration diagrams thereof. As shown in FIG. 4, 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. 5, rods 23 are 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. The sliding body 24 has a short shaft 26 so as to be orthogonal to the rod 23.
A stopper 25 is rotatably supported on the short shaft 26. Here, the stopper 25 is extended so that the locking hole 25a formed at one end thereof is loosely fitted to the rod 23 and the other end thereof can be grasped by a finger.

The sliding body 24 is fixed at an arbitrary position of the rod 23 by the stopper 25 tilting 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. 6, 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.

7 and 8 show the schematic construction of the open / close lock mechanism of the document table unit. As shown in FIGS. 7 and 8, the TPS has a configuration in which the scanner unit 30 is placed on the document table unit 35. Both of these units 3
0 and 35 are connected to each other by a hinge 36 provided on the rear side of the TPS, and have a shell-type opening / closing structure in which the front side of the TPS is opened. The open / close lock mechanism of the document table unit in this TPS is provided in both units 30, 3
5 is arranged in the front part. As described above, the side plate 18 is provided with the fixing pin 19.

Further, as shown in FIG. 7, 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.

The opening / closing lever 33 is provided with a spring 34, 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. 7, the opening / closing lock claw 32 engages with the fixing pin 19 and the document table unit 3
Locked against 5. 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.
Is released, and as shown in FIG. 8, the scanner unit 30
Opens upward with the hinge 36 as the center of rotation, and the upper part (document table 1) of the document table unit 35 is opened.

Next, the document table pressure fixing switching device and the document table 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 behavior 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. 9 to 14 show configuration examples of a mechanism in which both of these devices are combined by one mechanism.

The control wire 40, which is one of the components of this mechanism, has a hook 41 at one end as shown in FIG.
Is fixed, and the other hook 42 is fixed to the other end.
A spherical stop ball 45 is fixed near the substantially central portion thereof. The hook 41 is provided at the outer end of the link plate 10 (the document table 1
It is fixed on the side that 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. 10 and 11, 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. As a result, the control pulley 48 moves 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. 9, that is, in the rotation direction when the document table 1 is lowered.

Next, the operation of lowering / fixing the document table 1 by this document table pressure fixing switching device will be described. Figure 9
In FIG. 11, when the shaft 54 is in a fixed state, when the document table 1 is pushed down by some external force, for example, the weight of the document BO or the pressure applied by the turned pages, the document table 1 side is pressed. The end of the control wire 40 fixed to 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 for 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 stopped.

Here, the fixing of the shaft 54 is performed by a document table lifting mechanism described below. That is, as shown in FIG. 12, a gear 56 is fixed to the shaft 54 so as to rotate integrally with the shaft 54.
Further, as shown in FIG. 13, the gear 56 is provided with a side plate 55.
The gear 57 is engaged with another gear 57 rotatably supported by a stud 59 fixed to the gear 57, and the rotation thereof 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 a worm gear 60 fixed to the output shaft of the platen raising / lowering motor 61 meshes with the worm wheel 58. With this configuration, when the platen 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 meshing with the gear 57 integrated with the worm wheel 58 is prevented. The shaft 54 connected through the is fixed.

Next, the operation of retracting the original table 1 to the lower side of the original table unit 35 will be described. In FIGS. 12 to 14, 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. Rotates in the direction of arrow a in FIG. 9, and the control wire 40 moves to the hook 44 side.

By this 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. 12 to 14, when the platen 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 that pushes the document table 1 upward is set to be stronger than the force that pulls 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, the control wire 40 is moved toward the hook 41 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. 14, and the manuscript surface of the main manuscript BO which is placed open 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 original table raising / lowering motor 61 is continuously driven in a state where the original surface on each original 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. 14, 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, the pair of left and right platen raising / lowering motors 61, which are the drive sources of the platen pressure fixing / switching device and the platen retracting device, are independently controlled by the microcomputer in the IPU 103 via each platen raising / lowering motor driver. Controlled.

FIG. 15 shows the downward retracting operation of the document table 1 in the aforementioned retracting operation mode, and FIG. 16 shows its timing chart. In this retract operation mode, I
As shown in FIG. 16, the microcomputer in the PU 103 reverses the left and right platen raising and 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. 17, 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 document tables 1, and in this state, the slide plates 3 are fixed by the size stoppers 27, and then the original document BO is 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.
The open / close lock claw 32 engages with the fixed pin 19 and is locked with respect to the document table unit 35 in the state where the scanner unit 30 is closed. 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 center 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, and when the scanner unit 30 is closed, any size of the main document can be surely pressed, and the setting property 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 a document set on the contact glass 206 of the scanner unit 30,
As shown in FIG. 4, the right end portion of the scale 207 arranged on the left side of the contact glass 206 serves as the end face reference with the reference set position of the document. As described above, in this case, the reference set position is different from the reading start position of the 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. 17), 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. The original on the contact glass 206 can be read at the same time as the page of the original on the original table 1 is turned.

In the case of this structure, 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 is mirror-inverted in the main scanning direction and stored in the frame memory 104 regardless of which side is arranged.

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 from the central home position to the left side,
It stops at the end home position detected by the end HP sensor.

17 to 21 are transition diagrams of the scanning unit 200 when the original table 1 is in the pressure / fixing mode.
FIG. 22 shows the timing chart. As shown in FIG. 17, the end home position of the scanning unit 200 is a reading 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. 14), the left platen raising / lowering motor is normally rotated to put the left platen 1 in a pressurized state. As a result, the original document BO is pressed against the scanning unit 200, and optimum reading is performed.

Then, as shown in FIG. 19, right before the scanning unit 200 reaches the main document center point, the right document pressing roller 281a contacts the left end of the right document table 1 (point B in FIG. 22). . IPU10 at this point
The microcomputer in 3 causes the right platen raising / lowering motor to rotate in the normal 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. 22). 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. 20 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, which has finished reading the right page of this document, with the left document pressing roller 281b hanging on the right end of the right document table 1 (point D in FIG. 21). , 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
The left side of the document pressing roller 281b is applied to the right end of the document platen 1 on the left side (point C) just before reaching the center point of the document shown in FIG. . At this time, 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.

Next, the scanning unit 200 starts the operation of passing the central point of the main document and superposing the turned up right page on the left page of the main 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 document 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. After that, the microcomputer in the IPU 103 moves the scanning unit 200 to the end home position shown in FIG. 17 and stops it.

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

FIG. 14 shows the 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 apparatus main body, and a document such as a sheet material or a thick original document is set on the contact glass 206 by a pressure plate (not shown), and the 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 apparatus main body of this TPS is the scanner unit 30, and the scanning unit 200 has the inside of the scanner unit 30 shown in FIG.
In, a document is scanned by traveling in the left-right direction. FIG. 23 shows a configuration diagram of the scanning drive system of the scanning unit 200.

FIG. 23 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. 24 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
The 80b has a double structure as shown in FIG. 25, and the winding roller shafts 251a, 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. 26, sheet winding gears 232a and 232b are fixed to the outer ends of the respective winding roller shafts 251a and 251b, and these sheet winding gears 232a and 232b are The left and right ends are fixed to the side plates of the scanner unit 30, and the idle gears 2 are attached to the drive rack 231 having teeth over substantially the entire length.
They are meshed with each other via 33a and 233b.
As a result, when the scanning unit 200 travels in FIG. 26, 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 document holding 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. 24, 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 driving 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. 27, the position of the lower surface of the document No. 05 is set in consideration of the floating margin of the document surface in advance, and the left document pressing roller 2
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. 28, the platen glass 205 has its side portion supported by a glass holder 269. Further, the platen glass 205 has a glass chamfered portion 271 at the lower end thereof, and a holder chamfered portion 270 at the outer lower end of the glass holder 269. At this time, the position of the side corner portion 272 of the glass chamfered portion 271 is configured to be positioned above the lower surface of the glass holder 269 by a slight height β, and during operation of the scanning unit 200, the platen glass is operated. The side edges of the document 205 are prevented from being caught by the page edges of the document.

On the other hand, inside the platen glass 205,
As shown in FIG. 24, 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 a 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. 26, a turning belt drive gear 234 is fixed to the end of the driving shaft of the turning belt drive roller 223, and the turning belt drive 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 runs, 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, so that the turning belt 2 moves 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. 24, is a keep solenoid shown in FIG. By the action of 255, the scanning unit 200 is moved to a 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 at 0, 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 the light, pass through the lens 216, and are reduced and imaged on the CCD of the reading sensor 101.

As shown in FIG. 29, 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 opposite to the side supporting the switching mirror 222.
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 indicated by the broken line and the position indicated 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. 24 as described above.
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. 29) is not particularly limited by the movement of the keep solenoid 255, but the advance position of the switching mirror 222 into the optical path (FIG. 29). (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. 29, 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 it is normal and the fulcrum 258 is rotated in a direction in which 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-described 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 its 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 optical path switching system described above may be configured as an optical system based on a switching mirror rotation system as shown in FIG. In this example, a switching mirror bracket 264 supporting the switching mirror 222 is rotatably supported at a fulcrum 265 with respect to the unit body of the scanning unit 200. 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 to 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 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 switching the optical path of the switching mirror 222 to the optical path for reading the sheet original through the contact glass 206, the switching mirror 222 is abutted on 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. 32 is 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, thus realizing 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. 32, 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. 17, 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 changes 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
34, the original scanning direction of the scanning unit 200 is reversed as shown in FIG. 34, and as shown in FIG. 35, 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 the 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. 32, and the charging pattern portion formed on the surface of the page-turning belt 208 precedes the page-turning operation and is the top page 25 of the original document BO.
Overlay on 4. Then, when the tip of the top page 254 crosses over the lower center of the turning belt 208, as shown in FIG. 35, 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, the charging timing of the turning belt 208 is set so that the turning operation of the turning belt 208 is started together with the return operation of the scanning unit 200 which returns at the same time when the reading of the original surface of the main document BO is completed. Therefore, the operation of the scanning unit 200 is efficient and efficient. However, as shown in FIG. 39, 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 from the contact point where the charging roller 225 contacts the turning belt 208 to the turning belt drive roller 223. When the distance is set to be larger than the distance L2 to the lowest point (L1 ≧ L2), the scanning unit 20
0 starts the return operation, and then the turning belt 20
It may be set to start charging to 8.

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. 35, when 0 is moved toward the end home position, the top page 25 of this original document BO is
As shown in FIG. 36, 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. 24) 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. 24) 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, so that this page 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.

Next, as shown in FIG. 37, the main document BO
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 (broken line positions in FIG. 32). In this state, when the scanning unit 200 is further moved toward the home position of the end portion thereof, as shown in FIG. 38, the turned-up original page is pulled by the binding section of the original 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 flipped 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
In the case of repeatedly executing the document reading / page turning operation for, or only the document reading or page turning operation repeatedly, as described above,
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 rail 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. As a result, 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 rear 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 inserted in b so as to sandwich the horizontal portions of the scanning rails 343a and 343b.
And pressing rollers 340a and 340b are rotatably arranged. Here, each positioning roller 339
Reference characters a and 339b have a function of determining the vertical position of the scanning unit 200 at the time of reading the original document and at the time of turning pages, and two of them are arranged on each of the scanning side plates 337a and 337b. On the other hand, the presser rollers 340a and 340b are respectively attached to the scanning rails 343a and 34e.
The horizontal portion of 3b is configured to be pressed from above.

That is, these press rollers 340a, 3
As shown in FIG. 41, 40b is rotatably supported on 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.

The scanning unit 200 includes a lateral pressing roller 341 rotatably supported by a roller bracket 338a on the front side, and the above-mentioned 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.

42 to 45, the page feed roller 250 is shown.
The configuration and action of The page feed roller 250 is shown in FIG.
And, as shown in FIG. 45, 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 that 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. 32 (when viewed from the side). They are located so that they overlap each other).
When the turning belt 208 is raised to the position shown by the solid line in FIG. 32, this page feed roller 250 also moves to the position shown by the solid line in FIG. 32, 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 it is slightly pressed by the turning belt 208.

As a result, the page feed roller 250 moves to the position shown in FIG.
As shown in FIG. 3, the page feed roller 250 is provided with a conveyance 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 is obtained. On the other hand, as shown in FIG. 38, when the turned-up original pages are 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. 32, respectively.

[0157] The page feed roller 25 configured as described above.
The operation of 0 is controlled by the toggle joint device shown in FIGS. 44 and 45. The shaft 248 which is the rotation center of the page feed roller 250 has a toggle lever 274 formed in a bell crank shape as shown in FIGS. 44 and 45.
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.

This toggle mechanism is normal, as shown in FIG. 44, the page feed roller 250 is retracted from the turning belt 208 to the position shown by the broken line in FIG. 32, 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 extension portions of both ends of the turning roller 224, and a part of the peripheral surface of the page feeding roller 250 moves to a position where the turning belt 208 slightly pressurizes it. .

On the other hand, as shown in FIG. 38, when the turned-up original page is discharged from the scanning unit 200,
By the operation of retracting the turning roller 224 to the position shown by the broken line in FIG. 32, the turning roller 224 descends from the position shown in FIG. 45 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. 32, 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, the page feed roller 250 moves from its retracted position in the direction in which it comes into contact with the turning belt 208 in association with the upward driving of the turning belt 208. It can be constructed inexpensively and compactly. The movement of the page feed roller 250 is
After the turning belt 208 starts to rise, it starts with a certain time lag (in the latter half of the raising of the turning belt 208), so that the end position of the original page turned up by the raising of the turning belt 208 is turned. 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 adjusted so that the uppermost page of the original document becomes a uniform plane. The directional displacement is automatically corrected. Further, the movement of the end portion of the original document in the horizontal direction is corrected by changing the leading edge position, the trailing edge position, and the page turning position by repeating the page turning.

FIG. 46 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 feed tray 70.
4 bank 705.

In the printer body 701, the photosensitive drum 706 is rotationally driven by the drive 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. Further, the paper is fed from a selected one of the paper feed trays 707 and 708 and the mass paper feed tray 704, or the paper is manually fed from the manual feed table 709, and the fed paper is the transfer charger. The visible image on the photoconductor drum 706 is transferred to the upper surface by 710, separated from the photoconductor drum 706 by the separation charger 711, and then the visible image is fixed by the fixing device 712 and sent to the reversing unit 703. . In addition, the photosensitive drum 706
After the paper is separated, the cleaning device removes the residual toner.

In the reversing unit 703, in the normal mode, the paper from the fixing device 712 is stored in the upper paper discharge tray with the image surface facing upward. Further, in the sort mode, the paper from the fixing device 712 is discharged to the sorter 702 and sorted into each bin of the sorter 702. Further, in the double-sided copy mode, the paper on which the surface image is formed from the fixing device 712 is sent to the double-sided reversing unit 700 provided in the bank 705 in the vertical direction. The double-sided reversing unit 700 switches back the fed sheets and sends 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 reverse mode, the paper from the fixing device 712 is once sent to the double-sided reverse section 700. The double-sided reversing unit 700 switches back the fed paper,
This sheet is conveyed to the upper side and discharged with the image forming surface facing downward. At this time, the original document is read in the page order and the read images are formed on the paper, so that the discharged paper is kept in the page order.

This apparatus is provided with the upper reading unit 200.
And a lower manuscript table for pressing the spread book manuscript on the lower side. The manuscript table is a drawer type, and the manuscript table is pulled out to the front side of the apparatus, and the manuscript is set on it. As shown in FIG. 47, the main document is set on the main document table in alignment with the left end of the binding portion and the front side reference. Then, fix the front cover of this manuscript to the fixing plate arranged on the left manuscript table, and fix the back cover to the fixing plate arranged on the right manuscript table.
The displacement of the top page due to the displacement of the shape of the binding portion during continuous reading of this document is prevented. The procedure for setting this document is as follows.

Open the drawer of the document table.

The left cover of the original is sandwiched by the fixing plate on the left original table with the left end of the binding portion and the front side reference.

The right cover of this document is clamped by the fixing plate on the right document table.

The page where the reading of the original is started is opened, the open / close lock claw 33 is set, and the original table is raised to make the upper page of the spread flat.

The drawer of the document table is closed.

In this apparatus, since the two-page spread original is set with the center front side reference as shown in FIG. 47, the left edge, the right edge, and the upper 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. 47, at the time of page-turning scanning after the image reading scanning of the original document, the black original table outer frame portion outside the maximum original document size in the sub-scanning direction of the two-page spread original document extends from the edge of the original document. The copy detection is started, the black original plate portion is read next, and the edge detection is performed on the two-page spread original. This document edge image detection circuit is arranged in the IPU 103,
The read data of a specific pixel in the sub-scanning direction is continuously sampled, the data is compared with a certain threshold value, and the position where the read image data whose pixel value is larger than that threshold value is repeated several times The page end position is in the sub-scanning direction. The IPU 103 calculates a page suction and rising position for turning the page from the detected page edge position, scans the reading unit 200 to that position, and temporarily stops it.
The start and end of the detection operation of this document edge image detection circuit is IP
Instructed by the microcomputer in U103, I
The microcomputer in the PU 103 manages the main document edge detection in the sub-scanning direction of the main document edge image detection circuit by the scanning position of the reading unit 200, and refers to the main scanning direction pixel counter to determine the main document edge image. The detection circuit detects the end of the original document in the main scanning direction.

Next, the detection of the right end image of the original document in the sub-scanning direction will be described. FIG. 63 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 size A3. The position of 101 is about 210 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. Data continuous 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 determined as the page edge portion.

FIG. 64 shows the right edge image detecting circuit of the document. The image detection circuit for the right end portion of the original document detects the right end portion of the original document in the sub-scanning direction based on the change of the read information by the specific pixel of the reading sensor 101 in the sub-scanning direction. Since the specific pixel in the main scanning direction of the reading sensor 101 corresponds to the original document placement reference on the front side and the minimum original size, the reference pixel of the reading sensor 101 in front of the apparatus is 64 mm 102.
The 4th pixel. The counter 401 is the reading sensor 10
The reading sensor 1 is reset by the synchronization signal LSYNC synchronized with the main scanning of 1 and counts the clock CLOCK synchronized with the pixel signal from the reading sensor 101.
An output signal that rises in synchronization with the pixel signal of the 1024th pixel from 01 is output.

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 scan 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 this reading for detecting the edge of the original document, the microcomputer in the IPU 103 causes the scanning unit 200 to start scanning to the left from the black original document table 1 at the right end in the scanning direction or the outer frame 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 generally, there is no character or image in the frame part of a dozen 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 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, when the spread book document shown in FIG. 63 has the size A3, the end of the book document is detected as a point 200 mm from the home position.

This original document set based on 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 end image of the original in the sub-scanning direction is IPU10.
It is used by the microcomputer in 3 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 end portion of the page of the spread original document is moved from the left side portion of the original table of the image data of the reading sensor 101 to the left end image detection circuit of the original document right end portion similar to the above-mentioned right end portion image detection circuit of the original document. To be detected. The microcomputer in the IPU 103 uses the end-portion image detection signal of the original document in the sub-scanning direction to determine the effective image range in the sub-scanning direction of the original document. For example, in copying, the resist is used to determine the image position on the transfer paper. Further, an image outside the effective image range in the sub-scanning direction is automatically deleted to prevent useless black solid images. Further, when applied to a file system or the like, the microcomputer in the IPU 103 reduces the image data by the end image detection signal of the main document sub-scanning direction and saves the memory amount.

Next, the edge image detection of the main document main scanning direction will be described. FIG. 65 shows an end image detection circuit of the main document in the main scanning direction. The detection of the end image in the main scanning direction of this document is performed by the change in the read data of one line of the main scanning of the reading sensor 101. 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 on the main document table 1. The two-page spread original document BO is aligned on the original 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 and with the front side as the reference. The front cover of the original document is fixed to the fixing plate arranged on the left manuscript table 1 and the back cover of the original manuscript is fixed to the fixing plate arranged on the right manuscript table 1, and the binding is performed during continuous reading of the manuscript. Prevents displacement of the top page due to displacement of part shape. The procedure for setting this document is as follows.

Open the drawer of the document table.

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, since the original document is set on the document table 1 with the center front side reference, the left edge, right edge, and upper edge of the page differ depending on the size of the spread original document. 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.

At the time of page-turning scanning after the image reading of the original document, the edge detection of the original document is started 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. The black platen is read and the edge detection is performed on the two-page spread document side. 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 main document edge image in the main scanning direction at the position where the scanning unit 200 is temporarily stopped. The two-page spread original is set with the center front side reference as shown in FIG.
The read data for one line of the main scanning is sampled at a position where the page suction / lift position, that is, the image reading position is surely on the spread original in the sub scanning direction. The data for the one line starts from the position of the black outer frame of the original plate on the inner side of the maximum original size, and then becomes the black original plate and the spread original. Edge detection in the main scanning direction is performed by comparing continuous data in the main scanning direction with a threshold value, and a position where a plurality of pixels whose read image data is larger than the threshold value is repeated in the main scanning direction is the main scanning direction. It is set at the page edge position.

In the example shown in FIG. 66, reading is performed in the arrow direction 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. 67 shows the upper end detection data of the spread book document BO by the reading sensor 101. When the spread book document size is B4, the upper end 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. The reading sensor 101 starts detection in the frontward 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 No. 1, the inside of the right cover is read in this document, then the background density which is the margin of the top page is read, and the image is generally read after a margin of several tens of 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 to detect the beginning of the blank area of the top page, and sets the position as the top edge of the page.

The main-scanning-direction end image detection circuit shown in FIG. 65 detects the main-scanning-direction end of the original document based on a change in the read data of one line of the main scanning by the reading sensor 101.
As shown in FIG. 66, the two-page spread original document BO is set and fixed on the main document table 1 with the left end and front side of the binding portion as references. Since the original document placement reference is on the front side of the original document table 1 and the main scanning one line of the reading sensor 101 is read from the back side of the original document table 1, the reading sensor 101 is read.
Data in the main scanning direction are rearranged in the reverse order by the 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 image 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 main document BO is the same as above. Occurrence of page background is detected. In addition, the IPU 10 is used in the detection of the end image of the main document in the main scanning direction.
The microcomputer in 3 scans the processing time without controlling the scanning of the scanning unit 200, and is performed when the scanning of the scanning unit 200 is stopped to adsorb the page. The microcomputer in the IPU 103 detects the end image of the main document in the main scanning direction. Sometimes a reset signal R to the data latch circuit 408, the D flip-flop circuits 410 and 411 and the counter 413
Cancel ESET.

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

The microcomputer in the IPU 103 uses the end image detection signal 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 end image detection signal in the main scanning direction of the document to save the memory amount.

Next, the IPU 103 calculates the page suction and rising position, scans the reading unit 200 to that position and temporarily stops it, and at this position, similarly, the main document end image detection circuit similarly scans the main document in the main scanning direction. Edge detection.

This apparatus uses a transmissive page sensor 415 for page detection as shown in FIG. The page sensor 415 is configured to include 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 under the lower page conveyance guide 417. Page transport guide 41 forming page transport path 418
6, 417 are provided with holes 416a, 417a, 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. The page sensor 415 is a page conveyance guide 416, 417.
The page turning of the original document conveyed through the page is detected after separating one page. Further, the page 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. 14 scans the book document BO in the left direction after reading the book spread document BO and turns the page of the book document BO. The uppermost right page end of the original document BO is attracted to the turning belt 208, and the scanning unit 20
When the scanning of 0 is temporarily stopped, the page-turning belt 208 rises and the page-turning page is guided in the direction of 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 trail of turning pages rises and the folding belt 200
Is always almost constant and is determined by its mechanical layout. The page sensor 415 is arranged in the vicinity of the entrance of the page-turning section, which is a page-conveying path, and detects the page-turning page of the original document. The microcomputer in the IPU 103 detects the turning page storage start detection timing when the page sensor 415 detects the turning page, that is, the position of the scanning unit 200 at the turning page storage detection position of the turning page storage unit, so that the turning page is on the original document. The position of the right edge of the turning page when it meets is calculated.

When the scanning unit 200 is further scanned in the left direction after the turning pages are stored in the turning pages storing section, the two-page spread original document has the turning pages bound by the central binding section, so that the turning pages are bound by the binding section. While being pulled, it is discharged from the page-turning conveyance path in a U-shaped path. The trail of ejecting the turning pages is also the turning page conveying path and the pressing roller 281a.
It is always almost constant along. The microcomputer in the IPU 103 detects the turning pages from the scanning unit 200 at the timing when the page sensor 415 detects the original page turning page discharge start detection of the turning page storage section, that is, the position of the scanning unit 200 at the turning page storage section main document turning page discharge start detection timing. The position of the right end portion on the upper left of the original document is calculated from the output signal of the page storage sensor 415.

The microcomputer in the IPU 103 uses the calculated 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.

Next, the original document image standard will be described.
FIG. 49 shows a part of the operation unit 99 of this device. Operation unit 99
Is an image reference designation key 602 for designating an image reference mode at the time of copying this document, and a light emitting diode 6 for displaying the state.
03,604 are provided. The image reference position includes the center of the sheet (transfer sheet), the left edge of the sheet (left alignment), and the right edge of the sheet (right alignment). When the image reference designation key 602 is pressed, the image reference mode sets the image reference position to the center, left edge of the transfer sheet. The light emitting diode 6
03 lights in the image reference mode in which the image reference position is left aligned, and the light emitting diode 604 lights in the image reference mode in which the image reference position is right aligned. The basic image reference mode in which the image reference position is the center of the paper is not displayed.

FIG. 51 shows the page image range of the read spread book original, and FIGS. 52 and 53 show the arrangement of page images in each book original image reference mode. FIG. 51 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. In general, the pages of a two-page spread original document do not have a standard size because the image is shrunk by the binding portion even if the paper has a standard size. 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 bookbinding.

52 (a) to 52 (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. 52 (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 left end position of the page. When the read address operation of the frame memory 104 is performed from the length information (transfer sheet length information from the transfer sheet size detection unit) of the transfer sheet fed by the laser printer, the left end portion of the original document becomes the transfer sheet. The images of both double-page spreads of this document are formed on one sheet of transfer paper in line with the leading end position in the transport direction, so that the images of both double-page spreads are left-justified on the transfer paper, and thus the conventional scale-based copying machine is used. Formed similarly.

When the image reference position is at the center of the sheet as shown in FIG. 52B, 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
The length information in the scanning direction of the two-page spread original document calculated from the detection position by the microcomputer U103 and the length information of the transfer sheet fed by the laser printer (transfer sheet length information from the transfer sheet size detecting means) To frame memory 1
By operating the read address 04, the two-page spread image of the original document is formed in 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. 52C, when the image reference position is at the right end of the paper, the page end position in the scanning end direction of the two-page spread original document is detected as described above, and the microcomputer of the IPU 103 detects it. By operating the read address of the frame memory 104 based on 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 right end detection position is aligned with the rear end position of the transfer paper in the transport direction, and both spread pages of the original are formed on one transfer paper. As a result, the images of the two-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.

FIGS. 53A to 53D show the paper image 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. 53A, 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 is calculated. Of the frame memory 104 from the position of the page edge of the left page and the position of the central binding part.
By manipulating the read address of, the page end position of the left page in the scanning start direction of the two-page spread original is aligned with the leading end position of the first transfer sheet in the conveyance direction, and the center binding position is the conveyance of the second transfer sheet. Aligned with the leading end position in the direction, both spread pages of this document are formed on independent transfer sheets. Further, the images of the respective pages are formed on the respective transfer papers 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. 53B, the page edge positions of the left page and the right page 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 aligned with the both ends of the first transfer sheet, and the center binding position and the right page are aligned. The end positions of the pages are aligned with both ends of the second transfer paper, and the two-page spread pages of the original are formed at the centers of the independent transfer papers. 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. 53 (c), when the image reference position is the right end reference of the sheet, the left and right page end positions 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 the page end position and the center binding position of the right page, and the length information of the transfer sheet fed by the laser printer (transfer sheet length information from the transfer sheet size detecting means). By operating the read address of the frame memory 104, the center binding position of the double-page spread original in the scanning start direction is aligned with the rear end of the first transfer sheet, and the page end position of the right page is transferred to the second transfer. The image of each page is formed right-justified on the transfer paper in alignment with the rear end position of the paper in the transport direction. As a result, a margin 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. 53 (d), when the image reference positions are at both ends of the page, copying is performed by switching the image reference positions on the left and right pages of the sheet to the left edge and right edge of the paper, 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. 53 (e), copying is performed by switching the image reference positions on the right and left sides of the sheet on the left and right pages as in the case described above, that is, The center binding portion position of the double-page spread original document is calculated as described above, and the microcomputer of the IPU 103 sets the center binding portion position of the double-page spread original document to the position of the first transfer paper according to the calculated central binding portion position of the double-page spread original document. The two-page spread images of the original document are formed on two independent transfer sheets in accordance with the rear end position in the transfer direction and the front end position in the transfer direction of the second transfer sheet. Therefore, both double-page spreads of the original document are formed on the center side of the independent transfer paper, and margins are formed on both end sides of the transfer paper due to the contraction of the document.

Next, the image range of this document will be described. The reading sub-scanning direction range of the original document image and its arrangement method will be described with reference to the time charts of FIGS. 54 and 55. 54 and 55, 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 two-page spread original copy mode of FIG. 54, the effective image range (determined by VFGATE) of the two-page spread page 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 two-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 effective 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.
The microcomputer in the IPU 103 is each PFGA
The TE 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 VF
FH of white data is transmitted to the printer with each image data outside the GATE range as a margin.

PFGATE1 is PFGATE in the mode in which the image reference position is the left end of the paper, 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 are transferred. 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 PFGATE in the 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. Send so that a margin is created at the tip of. As for the image layout, the microcomputer in the IPU 103 calculates a difference 51 between the page range (VFGATE) of 6400 lines and the transfer paper image range (PFGATE2) of 6614 lines from the value of the counter that counts the number of image lines.
Four lines are provided in front of VFGATE as a blank area.

FIG. 55 shows the image range in the independent page copy mode. As in the case of FIG. 54, the effective image range (VFGATE) of the spread page of the cover size A4 has a positional relationship as shown in the drawing with respect to the read image data storage range of the frame memory 104, depending on the edge detection result. The microcomputer in the IPU 103 sets VFGATE by shrinking the binding portion of the book document based on the detection result of the edge of the book spread document.
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 mode in which the image reference is the left edge of the paper, the microcomputer in the IPU 103 arranges the spread left page image in the transfer paper image range {PFGATE1 (L)} of A4 size 3307 lines, and sets the frame. 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 range {PFGATE1 (R)} of A4 size 3307 lines, and the image data is transferred from the frame memory 104 to the printer so that the binding position is aligned with the leading end of the second transfer paper. Send to the trailing edge as well to create a margin.

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 area {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. As the image layout in this case, the microcomputer in the IPU 103 determines from the value of the counter that counts the number of image lines, 3200 lines of the page range (VFGATE) and 3 of the image range of the transfer paper {PFGATE3 (L)}.
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.
The image data is arranged in the 7-line transfer paper image range {PFGATE3 (R)}, and the image data from the frame memory 104 to the printer is adjusted so that the right page end position is aligned with the rear end of the second transfer paper and is similar to the front end of the transfer paper. Send so that margins are created.

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. .

56 to 59 show the copy operation timing in the main document mode of the present system. FIG. 56 shows the operation unit 99.
FIG. 57 to FIG. 59 show the case where the edge of the main document is detected by the image in the initial mode after the print key is pressed. Shows the case of implementation. 57 to 59
In this case, the first original document reading operation and the image edge detection operation are the same as those in FIG.

In FIGS. 56 to 59, 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. Reference numerals RP and LP of the read signal memory R of the frame memory 104 represent the right page (RP) and the left page (LP) of the read image data, respectively. Further, the page size of the main document in each mode is A4 size, two spread pages of the main document are continuously read by one scan of the scanning unit 200, and the read image data is stored in the frame memory 104 for A3 size. The image data is stored as read data, image data is read from the frame memory 104 according to each output mode, an image is formed by the laser printer 501, and recorded on a transfer sheet.

56 and 57, the image of the book document in the spread state is output on an A3 size transfer sheet, and the image of the book document is set to 1 for the document.
FIG. 5 shows the case of the 1 to 1 copy mode in which a copy is made.
Reference numeral 8 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. 59 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. 58, and the number of copies set is two, and two copies are made on the original document.

At the main document mode operation timing of FIG. 56, when the print key instructing the start of copying on the operation panel 99 is turned on, 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 the fluorescent lamps 201 and 202 and perform scanning for reading the original. Let it start.

The microcomputer in the IPU 103 processes the read image data as an original image from the left page end point of the two-page spread original and generates an effective image area signal SFGATE for the original sub-scanning direction. 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 recognizes the center point of the binding portion of the double-page spread original from the control address of the scanner motor 106, and reads this at the reference position of the second image in the independent page output mode or the read image in the double page output mode. It is used when, for example, forming on the center of the transfer paper.

The microcomputer in the IPU 103 starts the detection of the right page edge of the original document when the carriage 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 storage position of the page-turning page is detected for the first time, and the image effective range is determined by the page storage position, and then the laser printer forms an image. To start. In addition, 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. The microcomputer in the IPU 103 uses the effective image area signal PFGATE in the sub-scanning direction on the laser printer side.
The data read signal memory R of the frame memory 104 is operated to output image data in synchronization with the laser printer. Further, at the time of turning a page, the page sensor repeatedly detects the page edge of the two-page spread original. By repeating the above steps, the pages of the manuscript are automatically turned to make double-page spreads of the manuscript.

FIG. 58 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. 57, and at the time of page turning, the data read signal memory R of the frame memory 104 is operated by two PFGATEs according to 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 second image on the right page connected to the 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. 59 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 that in the case of FIG. 57, and in the image output at the time of page turning, a plurality of PFGs are provided according to the transfer paper continuously conveyed by the laser printer.
The data read signal memory R of the frame memory 104 is operated by the ATE, and a plurality of image data of each page of the original document is output. 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 page turning scanning, the carriage 200 stops at the reading scanning start position, and stands by for the next reading scanning.

This system performs a stable page-turning operation for the suction and separation of the pages of the original document by the 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 sensor detects the page edge of the document during 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. 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. Next, selection of the double-sided copy mode will be described. FIG. 60 shows a part of the operation unit 99. Operation unit 99
Includes a read selection key 601 for selectively setting a sheet original reading mode in which a sheet original on the contact glass 206 is read and copied and a main original reading mode in which a main original on the original table 1 is read and copied. Each time the reading selection key 601 is pressed, the sheet original reading mode and the main original reading mode are alternately set, and the set state is displayed by blinking the light emitting diode.

Further, as shown in FIG. 49, a double-sided designation key 602 for designating the double-sided copy mode at the time of copying the original document and light-emitting diodes 603, 604 for displaying the designated mode are provided in the operation section 99. 605 is provided. The double-sided copy mode includes (1) original double-sided copy mode, (2) double-page spread double-sided copy mode, and (3) automatic double-sided copy mode. Each time the double-sided selection key 602 is pressed, the original double-sided copy mode, double-page spread double-sided copy mode. The automatic double-sided copy mode is sequentially and repeatedly switched and designated, and the light emitting diodes 603, 604, and 605 for displaying the designated mode are sequentially turned on.

At the time of default such as power-on, mode clear, main document reading mode selection, etc., the main control board 107 releases all the double-sided modes and selects the single-sided copying mode. The main control board 107 enables the original double-sided copy mode, double-page spread double-sided copy mode, and automatic double-sided copy mode in the independent page mode for independently copying the image of each page of the original document. In the double-page spread mode for copying a double-sided spread page, only the selection of the original double-sided copy mode is enabled, and double-sided spread page copying is performed in which an image is formed on the front and back sides of the sheet for every two-page spread of this document.
Further, the main control plate 107 enables only one double-sided mode in the sheet original reading mode, and when the original double-sided copying mode is selected, each original is replaced and the front and back sides of the original are pressed each time the print key is pressed. The double-sided copying in which each image is sequentially copied is repeated.

The operation section 99 is composed of the operation section shown in FIG. 49 and an operation panel and display panel not shown. The operation panel is a print key other than the operation unit shown in FIG.
Operation keys such as the 0 key are provided, and the display panel has a display section for performing various displays. 49, 50, 60
Indicates a main part of the operation unit 99, which mainly sets and displays the copy mode of the main document. As shown in FIG. 49, the operation unit 99 includes a key 606 for selectively setting the sort mode and the stack mode of the sorter 702, and light emitting diodes 607, 6 for displaying the setting mode.
08 is provided, and each time the key 606 is pressed, the sort mode and the stack mode are set alternately. In addition, the operation unit 9
Reference numeral 9 has an image reference key 609 for setting the image reference to either left or right, and light emitting diodes 610 and 611 for displaying the set image reference, and the image reference key 609 is depressed. Each time, the image reference is set to left alignment and right alignment alternately.

Further, the operation section 99 is provided with a key 612 for setting a center erasing mode for erasing an image of a binding portion designated width with reference to the central portion of the two-page spread original, and a light emitting diode 613 for displaying the setting state. , A key 614 for setting a frame erasing mode for erasing an image with a specified outer frame width based on the original document, a light emitting diode 615 for displaying the setting state, and a transfer sheet with its image side facing up. And a light emitting diode 617 for displaying the setting state.

The operation unit 99 also has a copy format selection key 618 for selectively setting the independent page mode and the spread page mode, and light emitting diodes 619 and 620 for displaying the setting mode. Selection key 61
Each time 8 is pressed, the independent page mode and the spread page mode are set alternately. Further, the operation unit 99 is a page limiting key 621 for selectively setting a right page limited mode for copying only the double-page spread right page and a left page limited mode for copying only the double-page spread left page, and a selection state thereof. The light emitting diodes 622 and 623 for displaying are displayed, and the right page limited mode and the left page limited mode are alternately set each time the page limited key 621 is pressed.

The operation unit 99 also has a key 624 for increasing / decreasing the zoom magnification, a key 625 for independently setting the magnification, and a page number setting key 6 for setting the number of pages to be copied.
26, copy start page setting keys 628 and 629 for setting the copy start page of the two-page spread original to the left page and the right page, respectively.
Have. Further, the operation unit 99, as shown in FIG. 50, keys 630 to 633 for setting the center erase width, the upper erase width, the lower erase width, and the left and right erase width of the original document, respectively.
Keys 634 to 636 for setting whether to set the image reference shift amount by the left reference, the right reference, or the whole image, and the erasing width of this document and the image reference shift amount are set by the ten key and the enter key. To be done.

Next, the mode control flow will be described. 62 to 67 show control flows in each mode. These controls are performed by the main controller (main controller) that controls the image forming mode, and the IPU controller (controller of the IPU 103) is instructed by the main controller.
Controls the reading of original images, data processing, and page turning. The sequence controller (sequence control unit) also controls the timing of the load on the image forming unit. First, the copy format mode will be described. The copy format mode is effective in this original reading mode, and (1)
There are independent page mode and (2) spread page mode. In this apparatus, priority is given to the copy format mode, and the first setting is (1) independent page mode in which one page of the original is formed on one transfer sheet, which is frequently used. Further, the initial setting of the copy format mode when the power is turned on or when the main document reading mode is selected is (1) independent page mode.

As shown in the copy format selection flow of FIG. 61, the main controller sets 1 to the copy format counter at power-on, increments the copy format counter each time the copy format selection key 618 is pressed, and copies the copy format counter. When is greater than 3, the copy format counter is set to 1. Then, the main controller sets the independent page mode to light only the light emitting diode 619 when the copy format counter is 1, and sets the spread page mode to only the light emitting diode 620 when the copy format counter is 2. Light up.

When the independent page mode is designated, the main controller reads out the read page image of the two-page spread original from the frame memory 104 for each page as shown in FIG.
Form on the page transfer paper. As for the image alignment, the page image position is calculated from the page edge detection as described above, and the image is placed on the transfer paper. On the other hand, when the spread page mode is designated, the main controller continuously reads the read image information of both pages of the spread book document from the frame memory 104 to form one page of transfer paper.

Generally, books and books are bound with double-sided printed matter, and there are also bound with double-sided originals such as stapler stoppers for office documents and files. In this device, which reads the original document and forms an image of the read page on the transfer paper, and turns the pages of the original document, in this apparatus, an independent page mode in which an image for each page of the original document is formed on one sheet of paper, and a two-page spread of the original document By providing the double-page spread mode in which the images of both pages are formed on one page of paper, it is possible to obtain a copy having a different image forming form. In particular, the independent page mode has the same page structure as the original document. In the double-page spread mode, the number of copies is halved, and images such as gravure are spread over the double-page spread as continuous images.

Further, the present apparatus reads both page images of a two-page spread original document in one scan, writes the read image data in the frame memory 104, divides the read image data into an image range for each page, and divides the read image data into a frame memory. The image data is read out from the page 104 to form an image on one page of the sheet, and the read image data is continuously read from both sides of the page to be read from the frame memory 104 to form the images of both pages of the two pages of the original document on one page of the sheet. The reading is controlled to be the same in one unidirectional scan.

Next, reading selection will be described. This apparatus has an automatic page-turning mechanism for reading originals and a sheet original reading function. In this apparatus, a priority order is set in the reading selection mode, the first setting with the highest priority is the original document reading mode, and the default setting when the power is turned on or when the mode is cleared is the original document reading mode. Further, this initial setting mode can be set programmable in the image forming section, and the setting mode can be stored in a non-volatile memory accessible by the CPU of the main control board 107 to read either original according to the purpose. The mode can be selected. In addition, by performing a preliminary operation to start reading the original when switching the original reading mode selection, when the original reading mode is selected, the carriage waits in a state where the original can be set by homing the carriage and moving the original table. The time for starting the reading operation (time for homing the carriage, switching the mirror and fluorescent lamps and preheating, moving the document table) is shortened.

As shown in the reading selection flow of FIG. 62, the main controller causes the reading selection counter to set the initial setting value of 1 or 2 in the nonvolatile memory when the power is turned on.
After waiting for warm-up, the input signals from the reading selection key 601 and the detection means for detecting the presence or absence of the original document on the document table 1 are checked, and when the reading selection key 601 is pressed, the document table 1 is pressed. If there is this original document and if there is this original document, prohibit the switching of the reading mode by the reading selection key 601 and make the display panel display the warning message "Original document is left" This prevents the main document from obstructing the scanning of the carriage and the main document from being damaged when the sheet document is read. Further, since the original document cannot be seen when it is set on the original table 1, the operator is informed that the original document has been forgotten to be taken.

In this case, the main controller increments the reading selection counter each time the reading selection key 601 is pressed and sets 1 to the reading selection counter when the reading selection counter becomes larger than three.
Then, when the reading selection counter is 1, the main controller sets the original document reading mode to turn off the contact glass reading (sheet original reading) light emitting diode, homing the carriage, retracting the optical path of the central mirror 222, The fluorescent lamps 201 and 202 are turned on to receive the original document set. When the reading selection counter is 2, the main controller sets the sheet original reading mode to light the contact glass reading light emitting diode, homing the carriage, advancing the optical path of the central mirror 222, and fluorescent lamps 203, 20.
4 is turned on to accept the original document set.

Next, the erase mode input will be described.
As shown in FIG. 49, a center erasing key 612 for setting a center erasing mode for erasing the image of the binding portion designated width with reference to the central portion of the two-page spread original, and a light emitting diode 613 for displaying the setting state, A frame erase key 614 for setting a frame erase mode for erasing an image having a specified outer frame width on the basis of the original document and a light emitting diode 615 for displaying the setting state are provided. This is effective in this original reading mode. Further, as shown in FIG. 50, the operation unit sets a center mode, an upper mode, a lower mode, and a left / right mode in which the center erase width, the upper erase width, the lower erase width, and the left / right erase width of the original can be set. Keys 630 to 633, a light emitting diode indicating that each erase width setting mode is being set, and keys 634 and 635 for setting whether the image reference shift amount is set by the left reference or the right reference. The erase width and the image reference shift amount of the original document are designated by the ten keys and the enter key. Further, the operation unit is provided with a full-screen image key 636 for setting a full-screen image mode in which an image is formed on the entire surface of the transfer paper size regardless of the page size of the original document, and a light emitting diode for displaying the status.

FIG. 68 shows a control flow in the erase mode. This control flow is performed by the main controller, and I
The PU controller controls the image erasing process according to each erasing mode and erasing width data command from the main controller. Further, as shown in FIG. 68, the main controller alternately sets and cancels the center erasing mode each time the center erasing key 612 is pressed by an input signal from the center erasing key 612. When the center erasing mode is set, the center erasing mode is set. A light emitting diode (LED) 613 indicating the erase mode is turned on to set a center erase width gate counter, and the light emitting diode 613 is turned off when the center erase mode is released.

Further, the main controller alternately sets and cancels the frame erasing mode each time the frame erasing key 614 is pressed, and when the frame erasing mode is set, the light emitting diode (LED) 615 for displaying the frame erasing mode is set. The upper, lower, left and right erase width gate counters are set by turning on the light, and the light emitting diode 615 is turned off when the frame erase mode is released. In the main erase mode, the upper erase mode, the lower erase mode, the left erase mode, the left erase mode, the left erase mode, and the left erase mode are used to determine the erase width entered using the numeric keypad. It is captured as data of the edge image erasing width and confirmed by pressing the enter key.

The IPU controller, in the erase mode in response to a command from the main controller, detects the data of each erase width input from the operation unit or initialized by the main controller and the detection result of the page size and page position (main scanning of this document). The image erasing range for the page image is calculated based on the detection results of the end portion in the direction of scanning and the end portion in the sub-scanning direction. The image is erased by converting to 0 (white). This apparatus is provided with a center erase key 612 and a frame erase key 614.
2, 614, the erasing setting of the binding portion image and the erasing setting of the page peripheral portion image are instructed independently.

Many of the books and books that are generally issued are of sizes other than the standard size, and the spread of the original document differs depending on the thickness of the original document, the paper quality, and the binding method. Therefore, when the original document is copied, the binding portion often has a shadow. Also, there is generally no image near the bound portion of the page, and there is generally no image about 20 mm from the edge of the page. In this apparatus, the main controller selects the center erasing mode for erasing the binding portion and erasing the main document frame portion as shown in the erasing mode flow of FIG. 68 in the default state such as power-on, main document reading mode selection, and mode clear. The frame erasing mode to be performed is specified and each erasing width is set to 10 mm. When the erasing process is not necessary, the respective erasing modes are released and the main document is copied, and when an image loss occurs rarely, the erasing mode is released and the main document is copied again by judging from the copy.

In the independent page copy mode in which the left and right pages of the double-page spread original are image-formed page by page, the right edge of the left page of the double-page spread original and the left edge of the right page of the double-page spread original (the binding portion side of the double-page spread original) are It is set by setting means for setting the erasing width of the binding portion image. This apparatus includes the frame memory 104 for storing the read image data as described above. Then, the read image data is temporarily stored in the frame memory 10
4 and the image data is read from the frame memory 104 and an image is formed by the printer. The image around the page and the image of the binding portion of the two-page spread document are stored in the frame memory 104.
The image data read from the image data is erased by an image erasing circuit described later and is not copied. Therefore, it is possible to select and cancel the image erasure setting during or after the reading of this document, and to rescan the document when the image is missing or the erasure is not suitable for image output. Instead, change only the erase width and re-output the image.

Next, the guidance display will be described.
The operation guides and warnings of this device are displayed on a liquid crystal panel arranged on the operation unit and capable of displaying characters in two columns of 20 digits. FIG. 69 shows a guidance display of this device.

FIG. 69 (A) shows a general display during the copying of the original document by the liquid crystal panel. This display content indicates that the copy magnification is the same in the original document reading mode, the copy page is set from page 15 to page 48 on the right side of the spread, and page 24 is being copied. In the guidance display section by the liquid crystal panel, the upper left is the reading mode selection state,
The upper right displays the copy magnification, the lower left displays the set number of pages, and the lower right displays the number of pages being copied.

FIG. 69 (B) shows a general display during copying of a sheet original by the liquid crystal panel. This display content indicates that the document reading mode is the sheet document reading mode and the copy magnification is the same size. FIG. 69C shows guidance displays 637 to 6 during setting of the erase width by the liquid crystal panel.
40. The guidance displays 637 to 640 are displayed in the erase width input mode from pressing of the erase width setting keys 630 to 633 to confirmation of the erase width input. The main controller is the center key 630 and the up key 63 for setting the erase width.
1, by pressing the down key 632 and the left / right key 633, the center erase mode, the up mode, the down mode, and the left / right mode are set, and the guidance displays 637 to 640 are selected.
While inputting the erase width in each mode, the numerical part blinks.

Then, the main controller takes in the numerical values of the erase width of each mode input by the 10 keys in millimeters, confirms these erase width values by pressing the enter key or the erase width setting key, and normally waits. Return to the mode guidance display. The erase width is 0 to 40 mm for the binding area of the original document set in the center mode, the upper edge of the original document set in the upper mode, the lower edge of the original document set in the lower mode, and the original document set in the left and right mode. The left and right ends can be set from 0 to 30 mm, respectively. Further, the main controller can set the initial values of these erasing widths to 10 mm, and can set the erasing widths as defaults at the time of ignition or power-on. This is performed by controlling whether or not the erase width is set to the initial value when the power is turned on and the mode is cleared by the program of the main controller.

Next, frame deletion will be described. Many of the books and books that are generally issued have a size other than the standard size, such as copy paper such as A series and B series, and the vertical and horizontal lengths of pages and the ratio thereof are not constant. This may be cut to adjust the page edges after bookbinding. In addition, even if the cover size of this document is a standard size, the page size of the spread book document is due to the binding margin and the bending of the binding section.
As shown in FIG. 71A, the page is shrunk in the page spread direction. Further, the image may be displaced depending on the setting position when copying the original document, the original document may be bent and set in the scanning direction, or the image may be skewed as shown in FIG. 71 (b). . This also occurs due to the imbalance of the pressure in the up-and-down direction of the binding portion of the double-page spread original document.
As shown in FIG. 1 (b), the page is distorted and arranged to be read. These occur not only in the conventional reading of the original on the original table, but also in the present apparatus due to the change of the page position due to the setting of the original and the page turning. As a result, the out-of-page image of the original document is often copied black, and the black portion is also often bent and formed on the paper, resulting in unsightly copying and wasting toner.

In general, the page image of the original document is arranged not within the page peripheral portion of the original document but within about 20 mm from the page peripheral portion.
This device detects the page size and page position of the original document as described above, reads the original document, erases the image of the outer frame portion of the specified width inside the page range by the image erasing circuit, and prints the read image on the paper. Form. In this case, the IPU controller causes the image erasing circuit to erase the image of the page frame portion on the page basis of the original document, thereby eliminating the missing page image regardless of the image layout at the time of copying such as the image reference mode. The page frame portion and the image outside the page are erased to form the read image on the sheet. Specifically, this apparatus detects the page edge of the original document, and the IPU controller detects the page edge with respect to the page upper edge, the page lower edge, the page left edge, and the page right edge of the spread book original. The image in the set erase width area inside the edge is erased by the image erase circuit to form the read image on the paper.

In detecting the page position, the page sensor 415 stores the page to be turned over of the original document in the page storage portion as described above, and detects the discharge timing, and the IPU controller detects the spread page according to the storage and discharge timings. The right edge of the page,
The position of the left edge of the page is calculated with high accuracy, and the image erasing circuit erases the image in the set erase width area of the right edge of the page and the left edge of the page of the two-page spread original document based on a command from the main controller from the detected position. As a result, the image outside the left and right edges of the page of the original document is accurately erased regardless of the change in the page position of the original document due to repeated page turning. The position of the double-page spread changes as the page of this document is turned, but the amount of change in turning one page is as small as 1 mm at most. The image erasing positions of the right end portion and the left end portion of the two-page spread original in reading after turning the page are determined based on the page end position detection information.

As described above, the present apparatus reads the two-page spread original document, detects the image range in the direction of the upper edge of the page of the two-page spread original document from the read image data, and the IPU controller sets and erases the upper end of the page of the two-page spread original document. The image is erased by the image erasing circuit and a useless black solid portion is not formed. Further, since the apparatus automatically copies the original document to turn pages,
The detection of the image range in the direction of the upper end of the double-page spread of the set original document by the IPU controller is performed only at the first time of the image reading scan of the original document, and the detection process and time are omitted.

In this apparatus, the original is placed so that the reading scanning direction is the page spread direction. Therefore, IPU
The controller sets the erase width of the page frame portion of the original document in parallel with the direction of each page end of the original document (in parallel with the upper edge, the lower edge, the left edge, and the right edge of each page) and a uniform width in a strip-shaped area. The erasing of the frame portion is performed by the image erasing circuit in synchronization with the vertical and horizontal gate signals. Further, in this apparatus, the spread book document is placed with the lower end of the page as a reference, and the IPU controller reads the image erasure at the lower end of the page of the set erasure width from the reference position on the lower side of the page of the spread book document. The image erasing circuit is made to perform the fixed reference from the front end direction in the scanning direction.

Next, center erase will be described. Generally, the books and books that are issued have different thicknesses depending on the number of pages in the book, and the spread of the book differs depending on the paper quality and the binding method of the book. Therefore, in the case of a two-page spread original, the binding portion of the two-page spread original is blurred away from the image forming surface, the original illumination becomes difficult to reach, and the image surface is inclined with respect to the optical path to reduce the reflected light. , Causes a shade in the binding portion image. Further, since the original document is scanned at the same magnification with respect to the image forming surface during reading, when the image portion is caught in the curved portion of the binding portion, the binding portion is shrunk in the page spread direction due to the distortion. Become. This occurs to some extent not only in a conventional copying machine that reads a document on a document table but also in this apparatus depending on the type of book. Therefore, in this original, the image of the binding portion is dark, specifically, the background portion is soiled and the character portion is thick, and is copied.

As described above, the apparatus detects the position of the page edge of the original document, calculates the binding position of the spread original document, reads the original document, erases the image of the binding part of the page, and reads the read image. Are formed on the paper. Generally, the shape of the double-page spread of this document whose double-side spread is pressed is often line-symmetric with respect to the central binding part. Both are similar. In the present apparatus, the IPU controller detects the position (center binding portion) where the spread pages of the spread document are joined as described above, and the images of the same set erase width on the left and right pages of the document are set based on the page joining position. Is erased by the image erasing circuit. Further, the shape of the double-page spread of the original document is often line-symmetric with respect to the central binding portion, and the shadow of the binding portion at the time of copying is caused by the original original document. Therefore, the IPU controller uses the double-page spread original document as a reference ( (The sum of the erase width on the left page and the erase width on the right page regardless of the copy format)
The erase width of the binding portion is determined according to the erase width set by the main controller, and the image erasing circuit erases the image at the binding portion position of the double-page spread original document by the erase width.

This apparatus reads a spread book document placed perpendicularly to the reading scanning direction, and the shade of the binding portion of the spread book document is formed in a band shape equal to the direction of the central binding portion due to its shape. The IPU controller sets the erasing width of the image information of the binding portion of the original document in a uniform strip-shaped area parallel to the direction of the central binding portion of the original document, and sets the image erasing area of the erasing width as a uniform width in the vertical and horizontal gates. The image is erased by the image erasing circuit in synchronization with the signal.

Next, the erase width setting will be described. Many of the books and books that are generally issued are of a size other than the standard size, and the spread of this manuscript differs depending on the thickness of the manuscript, the paper quality, and the binding method. Further, the image range of the original document differs depending on the original document, and the distance from the page edge portion and the distance from the binding portion are different. In the present apparatus, as described above, the IPU controller and the image erasing circuit constitute erasing means for erasing the binding portion image of the double-page spread original document and erasing means for erasing the page peripheral portion image of the double-page spread original document. And the operation section comprises a binding portion image erasing width varying means for varying the erasing width of the binding portion image and a page peripheral portion image erasing width varying means for varying the erasing width of the page peripheral portion image, and these varying means. Thus, each erasing width is set to an arbitrary width within the range where there is no image loss according to the original document. Generally, since the image position within the page of the original document is constant in the original document,
The main controller initializes the erase width according to the original document as described above.

The image range of the original document differs depending on the original document, and the distances from the binding portion, the upper edge of the page, the lower edge of the page, the left edge of the page, and the right edge of the page to the image edge are also different. However, in general, the image position on a page in the original document is almost constant and symmetrical in the original document, and thus the margins at the left end portion and the right end portion of the page are often the same. In this device, the center key 630, the up key 631, the down key 63
2, the left and right keys 633, ten keys, enter key, and main controller are used for erasing the binding image of the double-page spread original, erasing width of the upper edge image of the page, erasing width of the lower edge image of the page, and right edge of the right page. A means for independently setting the erasing width of the image and the erasing width of the left end image of the left page is configured.

Further, the standard setting value of each erasure width at the time of power-on, original document reading mode selection, mode clear, etc. is set to 10 mm, and each default value can be set by the operation unit according to the user. It is stored in the storage unit by the controller. Further, during or after the reading of the original document, the image erasing width can be designated and changed by the operation unit and the main controller, and the amount of the erasing width from the image data read from the frame memory 104 by the IPU controller is input to the image erasing circuit. Since the image is formed on the paper with the image data that is erased and erased by the printer, if the erase width is changed midway, the IP
The U controller finely adjusts the erasing width without reading the original again, and causes the image erasing circuit to erase the changed erasing width from the image data read from the frame memory 104 to cause the printer to erase the image. Form an image on paper with the data.

The full-screen image mode will be described next.
In some cases, the page size and page position of the page image of this document cannot be detected due to gravure or the like, or the image area is erased by erroneous detection, and the erase range may be applied to the image area due to a detection error. Furthermore, in a thick original document, the shadow of the binding portion may be applied to the image portion. In these cases, the full-screen image key 636 is used to specify the full-screen image mode in which an image is formed on the entire surface of the transfer paper regardless of the detected page size. IP
U controller is frame memory 1 in full screen image mode
The image data read from 04 is not erased, and is transferred to the printer so that an image is formed on the entire surface of the transfer paper regardless of the detected page size of the original document. Therefore, depending on the original document, a black portion may occur around the page or a line image of a shade or a page boundary may occur at the binding portion, but the deletion of the page image due to erasure does not occur.

The full-screen image mode is designated in the case of a special original document, and the IPU controller sets the erasing setting of the binding portion image (center erasing mode) and the erasing setting of the page peripheral portion image (frame erasing mode setting). When is canceled, the setting of the image formation on the entire surface of the transfer paper is made effective and the whole image mode is made effective.

Next, image erasing will be described. In this apparatus, even when the designation of the frame erasing mode is canceled, the page size and page position of the main document are detected by the control of each unit by the main controller as standard, and the main document is read and detected. An image outside the page range is erased by an image erasing circuit to form a read image on a sheet. This makes the copied image easy to see only by the page image information, eliminates wasteful toner consumption, and prevents an overload of the copying process such as cleaning, so that a black portion image outside the page range is not formed.

The desired image erasing area differs depending on the size and image position of the original document. Further, the binding portion and the image forming portion cannot be understood unless the shade is copied by combining with the image forming portion.
In particular, since the apparatus performs page turning scanning after reading scanning, the page must be manually returned to read the previous page again. This device reads the original document as described above, stores the read image data in the memory, turns the page of the original document, detects the page size and position during the page turning scanning, and reads the image data stored in the memory. The image data of the binding portion and the page edge portion is erased from the read image data based on the detection result, and the image is formed on the sheet by the erased image data. Therefore, since the image data read from the memory can be processed without performing the reading scan again, it is possible to change the erasing setting and the erasing width after reading the main document.

Next, the erased image will be described. FIG. 70
72 to 72 show examples of the erased image, and FIG. 72 shows the gate signal in the image effective range. 73 shows a standard erased image, and FIG. 74 shows an erased image in the whole image mode.

FIG. 70 shows an erased image in the independent page mode.
FIG. 70 (a) shows an example of a copied image in the case of copying a double-page spread left page and the page is smaller than the size of the transfer paper. The transfer paper size is A4, and the detected page size is 280 mm in length and 19 in width.
In the case of 0 mm, the page image is copied in the center of the transfer paper in the center alignment mode with the page lower side reference as described above.
Therefore, the page image area of 280 mm in length and 190 mm in width in the transfer paper is within the broken line, and a margin of 10 mm is formed on the left and right parts of the transfer paper and 17 mm is formed on the upper portion. When the frame erasing mode is designated, the IPU controller moves the left edge and the upper edge of the left page image to the inside of the page by the set erase width from the detected positions of the left edge and the upper edge of the original document. The image erasing circuit erases the entered image data in the erasing area. When the center erasure is designated, the IPU controller erases the left edge of the image on the right side of the page, the right edge of the original document about the binding section, and the erasing position set by the set erase width from the detected position of the center binding section. The image erasing circuit erases the image data of the area.

Next, a method of erasing an image will be described.
The IPU controller obtains the illustrated page image range by subtracting the erasing amount from the page range data obtained as described above, that is, the end portion in the sub-scanning direction of the original document detected as described above,
The left and right edge erasing width of the main controller from the data of the main scanning direction end, the center binding, and the lower placement reference position,
Obtain the page image range shown by subtracting each data of the upper end erase width, the lower end erase width, and the binding portion erase width to obtain the page image range and shifting it as described above according to the image reference mode, FIG. 72 according to the page image range.
As shown in (a), a gate signal for the image effective range in the main scanning direction and the sub scanning direction in the independent page copy mode is generated.
When the upper, lower, left and right image erasing widths are set to 10 mm and the center image erasing width is set to 10 mm, the image erasing range in the main scanning direction is 10 mm from the page edge to the top, bottom, left, and page edges. The range is 5 mm from the part to the right. Therefore, the blank area around the page image is 27 mm above the transfer paper and 10 m below.
m, 20 mm on the left side, and 15 mm on the right side. On the other hand, when the image reference mode for arranging the image closer to the edge of the transfer paper is right alignment and the right reference shift amount is 0 mm, the image is shifted 10 mm to the right, and the blank paper portion is arranged on the left side. The blank sheet area is 27 mm on the upper side of the transfer sheet and 10 mm on the lower side, which is 30 mm on the left side and 5 mm on the right side.

FIG. 75 shows the image erasing circuit. This image erasing circuit is at the final stage of data transfer after the frame memory 104 in the IPU 103 that performs image processing.
The multi-valued image data read from the frame memory 104 is masked by the gate signals in the main scanning direction and the sub scanning direction. This image erasing circuit is composed of a timer circuit and is composed of a gate signal generating circuit 641 for generating a gate signal according to the setting of the microcomputer of the IPU 103 and AND circuits 642 and 643, and the IPU controller is in the image effective range as described above. At the same time, gate signals in the main scanning direction and the sub scanning direction are generated for each page and added to the AND circuits 642 and 643.

The multivalued image data read from the frame memory 104 is logically ANDed with the gate signal in the main scanning direction by the AND circuit 642, and then logically ANDed with the gate signal in the subscanning direction by the AND circuit 643. The transfer paper is transferred to the printer unit, and the transfer sheet is formed with an effective image only in the shaded area of FIG. In the present embodiment, the image erasing circuit is composed of an AND circuit. However, the data of the blank sheet data portion stored in advance in the memory is artificially read as the image data outside the image effective range by using the gate signal of the image effective range as a trigger. May be.

FIG. 70B shows a spread right page image in the independent page copy mode. This shows an example in which the page image is skewed and read by setting the original, and if the image skew is several millimeters, a black image area around the page that can be slanted with respect to the transfer paper if the erasing width is set to about 10 mm is sufficient. Does not occur as shown. Similarly, even if an error of several millimeters occurs in page position detection, the image is erased by overlapping it, so that a black image portion around the page does not occur. As shown in FIG. 70 (b), the image is arranged slightly obliquely with respect to the transfer sheet, but similarly in the centering mode, it is arranged at the center of the transfer sheet on the lower side of the page. 280 mm length and 190 mm width inside the transfer paper
The page image range is the A4 size transfer paper range and is within the broken line. The transfer paper has a margin of 10 mm on the left and right sides and an average of 17 mm on the top side. When the bottom, left and right image erasing widths are set to 10 mm and the center image erasing width is set to 10 mm, the blank area around the page image is 27 mm above the transfer paper, 10 mm below, 15 mm left and 15 mm right. It is formed in a frame shape on the transfer paper such as 20 mm.

FIG. 71 shows an erased image in the spread page copy mode. FIG. 71A shows a case where the page width is smaller than the size of the transfer sheet, and is an example in which a main document having a transfer sheet size B4 and a cover sheet size B5 is copied. Even if the cover size is B5, the size of the two pages that open the original document is the shrinkage due to the binding portion of the original document, and is about 10 m in one page in the reading sub-scanning direction.
m, a double-page spread is shrunk by about 20 mm and detected. At this time, the length of the transfer sheet in the sub-scanning direction is equal to the page length of the original document. When the copy format is a double-page spread and the standard centering mode is used, the shrinkage of the double-page spread is evenly arranged on the left and right sides of the transfer paper by 10 mm as shown in the figure to form a margin. When the frame erase mode is specified, the upper and lower image erase widths are each 10 m
m, and the left and right erasing widths are set to 5 mm, the blank area around the page image is 10 mm above the transfer paper and 1 below the transfer paper.
It is formed in a band shape around the transfer paper as a blank portion having a width of 0 mm and a width of 15 mm on the left side and the right side. When the center erasing mode is designated and the center image erasing width is set to 10 mm, the left and right pages are centered on the joint position (center binding) of the double-page spreads of the original document calculated as described above. 5
A band-shaped blank portion having a total length of 10 mm is formed for each mm. As a result, each page range is arranged at the position of the broken line, and only the image of the shaded area is formed.

FIG. 71B shows an example of image formation in the case where both the spread pages and the transfer paper have the same B4 size. In this case, the image erasing width specified in the frame erasing mode and the center erasing mode becomes the margin area of the transfer paper,
In the example of the erase width shown, the upper side of the transfer paper is 8 mm and the lower side is 9 mm.
mm, left and right 12 mm, center 15 mm
Spread page images outside the range of are formed.

In frame erasing, the IPU controller obtains the page image range by subtracting the erasing amount from the page range data obtained respectively in the main scanning direction and the sub-scanning direction as described above, that is, the page original range detected as described above. Sub scanning direction end,
The page image range is obtained by subtracting each data of the left and right edge erasure width, the upper edge erasure width, and the lower edge erasure width from the main controller from the data of the edge position in the main scanning direction and each position of the lower placement reference. Is shifted as described above according to the image reference mode, and in center erasing, the image area in the sub-scanning direction is sorted by the center binding portion and the set binding portion erasing width is subtracted to obtain the page image range and this is set as the image reference mode. Together with the shift as described above, the page image range shown in the figure is obtained in this way, and in accordance with this, as shown in FIG. 72 (b), the main scanning direction and the two-divided sub-scanning direction in the double-page spread mode. Generates a gate signal in the image effective range. Then, similarly, in the image erasing circuit, the frame memory 104 is generated by the gate signal.
The multi-valued image data read from is masked, and the image is output from the printer by the image data from the image erasing circuit.

In the present apparatus, the main controller normally erases the image outside the page image range detected as described above to form an image even if the frame erasing mode and the center erasing mode are released by the operation unit. This is equivalent to performing image erasing with each erasing width set to 0 mm. Therefore, when the page size of the original document is smaller than the transfer paper size, an extra black solid portion outside the page range is not formed. FIG. 73 shows a standard erased image when the spread left page is smaller than the transfer paper size. In the centering mode, the page range is erased on the upper side, left side, and right side of the transfer paper within the shaded area as shown.

In this apparatus, when the full image mode is designated and the frame erasing mode and the center erasing are canceled, an image of the entire transfer paper size is formed regardless of the page range. However, for the reason of the image forming process, the area around the transfer paper 5
A writing gate signal is used to control the image formation in the range of about mm so as not to form an image. Therefore, when the page size of the original document is smaller than the transfer paper size, the black on the upper part of the original document table is formed on the upper side, left side, or right side of the transfer sheet outside the page range, and the image is not erased. FIG. 74 shows an erased image in the full-screen image mode when the page is smaller than the size of the transfer paper on the left-side spread. In the centering mode, an image is formed on the entire surface of the transfer paper within the shaded area of the page image area.

If the page image size to be copied is equal to the transfer paper size, or if the former is larger than the latter, images outside the page range are not formed outside the transfer paper even if they are erased, so the frame erase mode and center erase are performed. The standard erased image when the mode is released or the image in the full-image mode is almost equal to the erased image. Further, since this apparatus erases images based on the pages of this document, if the page image size to be copied that is generally used is equal to the transfer paper size, it is determined that the image was erased on the basis of the transfer paper. It will be similar.

Next, the copy mode and function will be described. The copy mode, input keys and their functions of this apparatus will be described below with reference to FIGS. 49, 50 and 60. 1. Common copy mode key (key commonly used in each copy mode of operation unit 99) (1) Sort / stack key 606 (2) Paper selection key (3) Copy density adjustment key (4) Automatic Key for setting density (5) Numeric keypad (6) Mode clear / preheat key (7) Decimal key (8) Clear / stop key (9) Numerical confirmation / enter key (10) Interrupt key (11) Start key (print Key) 2. Semi-common copy mode key (1) Independent variable magnification key Independent variable magnification range 71% to 1 in both main and sub scanning directions
Key 625 that sets 1% pitch in the range of 41% (2) Zoom key Key 624 that sets the zoom range in 1% pitch in the range of 71% to 141% (3) Reduction / enlargement / magnification key With fixed scaling Copy magnification of 71, 82, 87, 93, 11
Keys set to 5, 122, 141% (4) Character / Photo / Character Photo Key Using the multi-bit frame memory 104, character / photo /
A key that switches each mode of character photography to perform gradation processing of image data The above-mentioned functions are the same as those of the conventional copying machine.

3. New copy mode (1) Duplex mode ○ Single-sided copy mode (default) Front and back page mode The original and front and back images are formed on both sides of the paper.

The high-speed double-sided copying mode is limited to the 1-to-1 double-sided mode, the page order of the image data is exchanged using the frame memory 104, the image on the right page is formed on the surface of the first transfer sheet, and is conveyed by the double-sided conveying path. Then, the pages of this document are turned over, the image on the right page is formed on the front surface of the second transfer paper, and the paper is conveyed by the double-sided conveyance path. An image is formed and the first transfer paper is ejected.
When the number of copies is "2" or more, the transfer sheets are once stacked on the double-sided tray and are not conveyed by the high-speed double-sided path.

Spread Left / Right Page Mode Images of the spread left / right pages of this document are copied on the front and back sides of a transfer sheet. Page claw mode Copies the image of the copy start page of the left and right pages of this document from the surface of the transfer paper. Therefore, when the right page is designated as the copy start page, both sides of the front and back pages are copied, and when the left page is designated as the copy start page, both sides of the two-page spread are copied. When the sheet original scanning mode is selected,
Only double-sided copying of front and back pages is valid, and normal single-sided originals are copied on both sides. (2) Erase mode Center erase mode (default: Yes) Detects the position of the original and erases the image of the specified width of the binding with the center of the two-page spread original as the reference.

Frame Erasing Mode (default: Yes) The size of the original is detected and the image of the specified width of the outer frame (upper, lower, left and right) is erased based on this original. To cancel the upper, lower, left and right erase independently, set the erase width set value to "0". Images outside the size of this document are normally automatically deleted.

(3) Reference mode ○ Center mode (default) Copy is performed on the center of the transfer paper in the sub-scanning direction on the basis of the transfer paper. The image shift in the sub-scanning direction is performed by detecting the page length of the original document and placing it on the transfer paper. Right alignment mode Copies from the right side of the transfer paper to the set shift amount position with reference to the transfer paper.

Normally, the binding margin is formed on the left side of the transfer paper by the shrinkage of the binding section. Left alignment mode Copies from the left side of the transfer paper to the set shift amount position with reference to the transfer paper. When the seat mode is selected, the alignment is always right. This is also effective in the double-page spread mode, and images are arranged on the transfer paper according to the length of both pages of the double-page spread original.

(4) Page limited mode ○ Both page mode (default) Both right and left pages are copied. Effective in independent page mode. Right page mode Copy only the right page of the two-page spread document. Used when copying single-sided originals such as files.

Left page mode Only the left page of the two-page spread original is copied. (5) Copy format mode Independent page mode (default) The double-page spreads of this document are copied for each page.

Spread Pages Mode Both spread pages of this document are copied as they are. For double-sided copying of a double-page spread in which both the first double-page spreads are copied on the front surface of the transfer paper and the second double-page spreads are copied on the back surface of the transfer paper, only the double-sided front / back page mode is selected for the double-page spreads.

(6) Paper ejection selection mode ○ Back surface ejection mode (default) Since this original is read in page order, the transfer paper is ejected with the back surface ejected with the image surface facing downward during normal single-sided copying. Front-side ejection mode Specify this when the number of originals is small or when checking images, and eject the transfer paper without inverting it.

It is possible to specify even when the seat mode is selected. The transfer paper in the double-sided copy mode is discharged without inverting the transfer paper regardless of the setting.

(7) Page number setting input mode Start-end page mode The number of pages from the copy start page to the copy end page is calculated, and the difference page is copied. Copy Page Number Mode Repeats the specified number of pages from the specified left or right page of this document. In this case, it is not necessary to input the copy page in the start-end page input mode.

[0293] If this manuscript does not have page numbers,
Used when the page is skipped. The number of pages setting method is 1. Select the copy page number input mode with each mode key, and 2. Enter the value on the copy page using the numeric keypad and 3. Confirm with Enter key. Normally, one page of this original is counted as one page, and when copying only the right page or the left page, it is regarded as a single-sided original and the copied page is counted as one page.

(8) Copy start page input mode Left page mode In the independent page mode, copying is started from the left page of the document. Right page mode In independent page mode, copying starts from the right page of the original. This is also specified when each duplex mode is selected. In the double-sided copy mode, the first page and the last page are automatically discharged as blank pages by setting the copy start page and the number of pages. When outputting a double-page spread, the first and last half-page designations (half-size erasure) cannot be performed.

(9) Reading selection input mode ○ Main document reading mode (default) In the lower side reading, the main document is read and automatic page turning is performed. Sheet document reading mode Scan the sheet document in the upper side reading. Specify when copying a sheet document or the cover (hard cover) of this document.

4. Quantity setting mode The quantity setting method is 1. Select the amount setting mode with each mode key, 2. Enter the set value with the numeric keypad, and 3. Confirm with Enter key. (1) Erase width setting mode Center mode (default: 10 mm) The erase width is set in 1 mm units from 0 mm to 40 mm based on the original. In the independent page copy mode, the binding portion erasing width of each page is half this.

Upper mode (default: 10 mm) The erasing width is set in units of 1 mm from 0 mm to 30 mm based on the original. Lower mode (default: 10 mm) Set the erase width in 1 mm units from 0 mm to 30 mm based on the original. Left / right mode (default: 10 mm) Set the erase width in 1 mm units from 0 mm to 30 mm based on the original. The left and right edges have the same amount, and the center erase width has priority in the independent page copy mode.

(2) Reference shift amount setting mode Left reference mode (default: 0 mm) The position (shift amount) from the left side of the transfer paper is set in units of 1 mm from 0 mm to 20 mm. Right reference mode (default: 0 mm) From 0 mm to 20 mm, set the position (shift amount) from the right side of the transfer paper in units of 1 mm.

(3) Full image mode The image is copied on the entire surface of the transfer paper without erasing the image outside the original size. This is used when the size of the original document in the main scanning direction is unknown, and is effective when the frame erasing mode is canceled. Image data outside the reading scanning range in the sub-scanning direction is white.

Next, the basic operation procedure of this apparatus (in the case of this original reading mode) will be described. (1) Selection of main document reading mode Press the reading selection key 601 to turn off the sheet original reading mode (in the case of sheet original reading mode). (2) Copy mode set Copy format selection Independent page mode or spread page mode selection Editing / processing selection Sort, double-sided, erasing, standard, page limited, surface discharge selection Page number setting (required) Copy page number, copy start page Enter other settings Copy function (magnification, paper selection, text / photo, density, number of copies)
Setting (3) This original set Open the original tray. Setting this document Place this document on the platen with the left edge of the binding area and the front standard.
Hold the left cover with the left holding plate. Hold the right cover with the right press plate. Open the copy start page. The slide lever 33 is pushed to set the document claw 32. (The setting table raises the platen to make the top of the page flat.) Close the document tray. The original document can be set again after being set. By operating the slide lever, the original table upper and lower original tray switches are pressed to lower the original table and the original tray can be opened and closed.

(4) Copying Copying start Press the print key to start the copying process. End of copying Automatic page turning / copying of the set number of pages (5) Original document take-out instruction Original tray open instruction Press the original tray switch to lower the original table and allow the opening. Open the document tray.

Open the document tray. Removing this document Pull the release lever to release the nipping of the left and right covers. Removing this original Close the original tray. After the original document set (3), copy mode set,
(2) The mode can be changed.

Next, the operation of the TPS system will be described. A. TPS operation mode (1) Reading mode Main document reading mode The sub-first mirror 222 is released, and the lower fluorescent lamps 201, 201 are released.
02 is turned on, and the carriage 200 is scanned to the right after shading correction at the left home position to read the two-page spread original at once, and the read image data is stored in the frame memory 104.

Sheet Original Reading Mode The sub first mirror 222 is inserted in the optical path, and the upper fluorescent lamp 20 is read.
3, 204 are turned on, and the carriage 200 is scanned rightward after shading correction at the left home position to read the sheet original, and the read image data is stored in the frame memory 104.

(2) Return Mode In the page-turning original reading mode, a high-voltage bias is applied to the turning-belt 208, the reading unit 200 is scanned leftward, and the turning-belt 208 reaches the right end of the two-page spread original. Stop at that point, raise the turning belt 208,
0.5 sec. After that, the carriage 200 is scanned leftward. The right edge and the upper edge of the two-page spread original are detected from the image read by the reading sensor, and the first page suction position and the image effective range in the main scanning direction are calculated. Further, when the page is turned, the position of the right end portion and the left end portion of the two-page spread original document is detected by the page sensor of the page conveying path, and the image effective range in the sub-scanning direction is calculated. Reading Unit Return In the sheet document reading mode, the reading unit 200
Scan to the left.

(3) Homing mode When the power is turned on normally, the original table is lowered to move the carriage 20.
Evacuate from 0. The carriage 200 is scanned and set at the center home position. (4) Pre-scanning mode The carriage 200 is scanned to the left home position to prepare for shading correction and reading. (5) Post-scanning mode After the return operation is completed, the carriage 200 is scanned and set at the central home position, and the document table is lowered to be retracted from the carriage 200, so that the original document can be taken out.

Next, the basic operation of TPS will be described in detail. (1) Main document reading mode a. By depressing the reading selection key 601, the original document reading mode is designated.

B. When the original document is set, both original tables are raised to abut and fix the original document on the reading unit 200, and the sub first mirror 222 is released.

C. By pressing the print key, the lower fluorescent lamps 201 and 202 are turned on. d. After scanning the reading unit 200 leftward to reach the left home position, shading correction, A
Perform GC. e. The reading unit 200 is scanned rightward to read the double-page spread image of the original document, and the image data is processed and then stored in the frame memory 104.

F. After scanning the reading unit 200 to the far right, charging of the turning belt 208 is started,
Scan the reading unit 200 to the left. g. The image of the original document is read by scanning the reading unit 200 in the left direction, and the right end portion of the original document is detected from the density difference between the original table and the page of the original document. h. When the turning belt 208 reaches the detected right end position of the original document, the reading unit 200 is temporarily stopped and the turning belt 208 is raised. After a certain period of time, the reading unit 200 is scanned leftward.

I. The image of the original document is read, the main scanning direction range of the original document is detected from the density difference between the original table and the original document page,
Calculate the automatic erase position in the vertical direction. After detecting the range of the main document in the main scanning direction, the lower fluorescent lamps 201 and 202 are turned off. j. The reading unit 20 after a certain time from the page suction
Scan 0 to the left. k. Detect the stored page with the page sensor on the page turning path,
The right end position of the page is accurately calculated from the detection start position.
It also detects whether the original is turned over.

L. At the point where the reading unit 200 reaches the center position, the left and right fixings of the left and right book manuscripts and the right and left of the right book manuscript stand are temporarily released to determine the spread shape of the book manuscript. m. When the turning belt 208 reaches the central point of this document,
The charging of the turning belt 208 is stopped. n. The reading unit 200 is scanned leftward to detect the discharge of the stored page by the page sensor of the page-turning path, and the left end position of the page is accurately calculated from the detection start position. Further, the central position of the double-page spread and the length of the double-page spread are calculated from the calculated left and right edge positions of the page.

O. After the completion of the calculation, the address of the frame memory 104 is designated by the detection position, the output form, and the erase information, and the data is read by the synchronizing signal from the printer and transferred to the printer. p. After the reading unit 200 reaches the left home position, the lower fluorescent lamps 201 and 202 are turned on to perform shading correction and AGC.

Q. The reading unit 200 is scanned in the right direction to read the double-page spread image of the original document, process the image data, and then store it in the frame memory 104. r. Read this document to the right edge,
Immediately after the 02 is turned off and the read image data is stored in the frame memory 104, the address of the frame memory 104 is specified by the detection position, the output form, and the erase information, and the data is read by the synchronizing signal from the printer. Transfer to printer.

S. Hereinafter, during continuous operation, f, h, j to n
Repeat the reading of p and r from p. (From the second time onward, the image detection at the end portions of g and i and the printout after the turning of o are not performed.) T. The end of the continuous operation is performed by the reading unit 200 after the reading unit 200 of p reaches the left home position.
00 is scanned to the right and stopped at the center home position.

(2) Sheet original reading mode a. By pressing the reading selection key 601, the sheet reading mode is designated.

B. The reading unit 200 is scanned leftward and the sub first mirror 222 is inserted.

C. By pressing the print key, the upper fluorescent lamps 203 and 204 are turned on.

D. After turning on the upper fluorescent lamps 203 and 204, shading correction and AGC are performed.

E. The reading unit 200 is scanned in the right direction to read a sheet original, and the image data is processed and then stored in the frame memory 104.

F. After scanning the reading unit 200 to a position determined by the transfer paper size and the magnification, the upper fluorescent lamp 2
03 and 204 are turned off, and the reading unit 200 is scanned leftward.

G. Immediately after the image data is 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 the data is transferred to the printer.

H. Hereinafter, during continuous operation, reading and returning from d to g and writing and reading from the frame memory 104 are repeated.

I. The end of the continuous operation is stopped at the point where the reading unit 200 of d reaches the left home position when the print key is not pressed again.

As described above, according to the present apparatus, since the page size and page position of the original document are detected and the outer frame portion of the page and the image outside thereof are erased, the page size and the original document placement position are formed. The out-of-page image of this document is not copied in black regardless of the change of. Further, since the image of the page frame portion is erased based on the page reference of the original document, the page image is not lost regardless of the image arrangement at the time of copying such as the image reference mode.

In general, the page image of the original document is arranged within about 20 mm from the peripheral portion of the page. Therefore, the page edge of the original document is detected and the image in the area of the set erase width inside the page edge is erased based on the upper edge of the page, the lower edge of the page, the left edge of the page, and the right edge of the page. By doing
The image in the double-page spread of the original document is not lost, and it is possible to prevent the generation of the black portion of the image outside the page of the original document at the upper edge of the page, the lower edge of the page, the left edge of the page, and the right edge of the page.

[0327] Also, the storage and discharge of the page turning pages of the original document is detected, and the right and left edge positions of the double-page spread original document are calculated with high accuracy according to the timing of the storage and discharging. Since the images in the right edge part and the left edge part of the double-page spread original are erased, the images outside the left and right edges of the page of the original are accurately recorded regardless of the change in the page position of the original due to repeated page turning. Can be erased.

Further, the position of the double-page spread changes due to the turning of the page of this document, but the amount of change in turning the page is extremely small at 1 mm. Therefore, the page edge position is detected for each page turning, and the image erasing position of the page right edge and the page left edge of the two-page spread original in the reading after the page turning is determined by the page edge position information immediately before the image erasure. As a result, the error in the erasing position is within 1 mm, which is a level that does not cause a problem, and more accurate image erasing can be performed at the page position.

Many books and books that are generally issued have a size other than the standard size such as copy paper such as A series and B series, and the page height is not always standard. Therefore, by detecting the image range in the direction of the upper edge of the page of the double-page spread original from the read image data of the double-page spread original and deleting the image of the upper edge of the page of the double-page spread original, without adding any other detection means, It is possible to prevent the formation of useless black solid portions.

Since the once set original document is not displaced in the vertical direction of the page, the image range of the two-page spread original document toward the upper edge of the page is detected only once after the image reading scanning. As a result, the detection process and time can be saved. The original is placed so that the reading scanning direction is the page spread direction, but the erasing width of the page frame of the original is parallel to the direction of each page end of the original and has a uniform width in a strip-shaped area. Therefore, the page frame portion of the original document can be erased in synchronization with the gate signals in the vertical and horizontal directions of the original document, the erasing method is easy, and the erasing range can be easily set.

Further, since the double-page spread original is placed with the lower end of the page as a reference and the image at the lower end of the page having the set erase width is erased from the reference position, the image at the lower end of the page is erased in the reading main scanning direction. Becomes a fixed reference, and it becomes easy to erase the image at the lower end of the page.

Many books and books that are generally issued have a size other than the standard size, such as copy paper such as A series and B series, and the vertical and horizontal lengths of pages and the ratio thereof are not constant. Further, the thickness of the original manuscript varies depending on the number of matching pages, and the spread condition of the original manuscript varies depending on the paper quality and binding method of the original manuscript. Therefore, in the case of a two-page spread original, the binding portion of the two-page spread original is blurred away from the image forming surface, the original illumination becomes difficult to reach, and the image surface is inclined with respect to the optical path to reduce the reflected light. , Causes a shade in the binding portion image. Further, since the image formation plane is scanned at the same size, when the image portion hangs on the binding portion, the binding portion shrinks in the page spread direction due to the distortion. This occurs to some extent depending on the type of book in this apparatus as well as the conventional one for reading an original on the original table. Therefore, the image of the binding portion of the original document is dark, specifically, the background portion is dirty and the character portion is thick in many cases to be copied, resulting in unsightly copying and wasting toner.

Therefore, in this apparatus, the position of the page edge of the original document is detected, the position of the binding portion of the spread original document is calculated, and the image of the binding portion of the page is erased. Therefore, the image of the binding portion of the original document is black. Or it will not be darkly copied. In general, the shape of the double-page spread of the original document, which is pressed against the surface by double-page spread, is often line-symmetric with respect to the central binding part, and the shadow of the binding part during copying largely depends on the type of the original document. Both pages are similar. Therefore, the position where the two-page spreads of the two-page spread original are joined is detected, and the images of the same width on the left and right pages of the two-page original are erased based on the joining position. Therefore, it is possible to perform the image erasing suitable for the original document. Moreover, it is easy for the operator to understand the image erasing of the symmetrical width of the left and right pages.

Generally, the shape of the double-page spread of the original document, which is pressed against the double-page spread surface, is often line-symmetric with respect to the central binding portion, and the shade of the binding portion during copying is caused by the original original document. Therefore, the two-page spread original is set as the reference (the total of the erase width of the left page and the erase width of the right page regardless of the copy format) to set the erase width of the binding portion, and the image of the binding portion position of the two-page spread original is set. By erasing, the binding portion erasing suitable for the original can be performed with a single set erasing amount, and the operator can easily set the erasing width of the binding portion.

Further, the present apparatus reads the spread book document placed vertically in the reading scanning direction, and the shade of the binding portion of the spread book document occurs in a band shape equal to the binding portion direction due to its shape. Therefore, by erasing the image information of the binding portion of the main document with a uniform strip-shaped area parallel to the binding portion direction of the main document, the binding portion can be optimally erased. Moreover, the erasing area has a uniform width, and the image of the binding portion can be erased in synchronization with the gate signals in the vertical and horizontal directions, the erasing method is easy, and the setting of the erasing range is easy to understand.

The image range of spread pages of books and books that are generally issued is often other than the standard size, and the spread state of this document differs depending on the thickness of the document, paper quality, and binding method. Therefore, when the original document is copied, the peripheral portion of the page becomes black and the binding portion is shaded. These largely depend on the type of the original document, and the black portion around the page and the shadow of the binding portion may not be correlated and may occur singly. Therefore, by providing means for erasing the binding portion image of the double-page spread original document and means for erasing the page peripheral portion image of the double-page spread original document, the binding portion image erasing setting and the page peripheral portion image erasing setting can be performed. You can instruct them independently and select according to the manuscript.

Many of the books and books that are generally issued are of sizes other than the standard size, and the spread of the original document differs depending on the thickness of the original document, the paper quality, and the binding method. Therefore, when the original document is copied, the binding portion often has a shadow. Further, there is generally no image near the binding portion of the page. Therefore, by erasing the binding portion image at default such as power-on, main document reading mode selection, mode clear, etc., the binding portion can be erased automatically in most cases. Moreover, in the rare case where an image loss occurs, it is possible to cancel the center erasing mode by judging from the copy, and the page image can be copied without losing the image information.

Many of the books and books that are generally issued are of sizes other than the standard size, and the spread of the original document differs depending on the thickness of the original document, the paper quality, and the binding method. Therefore, when the original document is copied, the periphery of the page often becomes black. Further, there is generally no image within 20 mm from the edge of the page. Therefore,
By erasing the image around the page at the defaults such as power-on, selection of original document reading mode, mode clear, etc., it is possible to automatically perform the erasing of the page edge suitable for most cases. Moreover, in the rare case where an image loss occurs, it is possible to cancel the frame erasing mode by judging from the copy and copy the page image without losing the image information.

The shadow of the binding portion is often caused by the original document, and the erasing of the binding portion is selected by the original document. In the independent page copy mode, which copies the left and right pages of a double-page spread original, the right edge of the left page of the double-page spread original and the left edge of the right page of the double-page spread original (the binding side of the double-page spread original) By setting the binding position, the image of the binding portion image can be preferentially executed based on the binding portion position of the main document even if the binding portion position is arranged at the edge of the sheet.

This apparatus reads the original document, stores the read image data in the memory, and reads the image data from the memory to form an image. Then, the page periphery image and the binding image of the two-page spread original document are erased from the image data read from the memory, and the deletion setting of the page periphery image and the binding image can be selected or canceled during or after the reading of the original document. The operator can change the image deletion selection on the way. Further, when an image is missing in the image output or the image erasing is not suitable, it is possible to re-output the image by changing only the image erasing without changing the original reading.

Many of the books and books that are generally issued are of sizes other than the standard size, and the spread of the original document differs depending on the thickness of the original document, the paper quality, and the binding method. Also, the image range is
Each manuscript is different, and the distance from the page edge and the distance from the binding portion are different. Normally, when a two-page spread original document is copied, a black portion appears around the page and a shade appears near the binding portion. In this device, the erasing width of the binding portion image can be changed by the operating portion, and the erasing width of the page peripheral portion image can be changed by the operating portion. It can be set to obtain an image with an appropriate erase width. In general, since the image position on the page of the original document is constant within the original document, it is sufficient to initialize the erasing width according to the original document in this apparatus, which is particularly effective.

The image range of books and books that are generally issued differs depending on the original document, and includes the binding portion, the upper edge of the page,
The distances from the bottom edge of the page, the left edge of the page, the right edge of the page to the image edge are different. However, in general, since the image position on the page of the main document is almost constant and symmetrical in the main document, the left end portion and the right end portion of the page are often the same.
With this device, each erase width can be set independently, so the image erase width in each direction around the page of this document can be set to an arbitrary width according to the document, and there is no image loss and no black portion is generated. You can get an image of. Further, the distances from the left edge of the page and the right edge of the page to the image edge are generally almost equal,
The erasure widths at the left edge and the right edge of the page have the same erase setting width, which facilitates the operation.

Many books and books that are generally issued have sizes other than the standard size, and the spread of the original document differs depending on the thickness of the original document, the paper quality, and the binding method. Therefore, when the original document is copied, the peripheral portion of the page becomes black and the binding portion may be shaded. There is generally no image about 20 mm from the edge of the page. Further, the shade of the binding portion largely depends on the degree of curvature of the page of the original document and the type of the original document, and even a thick original document reaches the image area. Therefore, the default setting value of each erasing width such as power-on, main document reading mode selection, and mode clear is set to 2 mm or more (10 mm in the embodiment).
By doing so, even if there is a deviation or a skew due to the setting of the original document, it is possible to surely erase preferentially the black portion around the page and the binding portion. This is a value that the margin of the page and the black portion of the binding portion are surely within the range even if the erasing position shifts due to the detection error of the page end portion or the binding portion position or the control accuracy. In addition, a value that does not cause image loss is initially set based on the position characteristics of the page image, and the operator can omit the operation without being aware of erasing the black portion around the page and the binding portion.

Further, since the erasing width of the image can be designated and changed during or after the reading of the original document, the operator can change the erasing width on the way. In addition, when an image is missing or is not suitable for erasing in image output, the erasing width can be finely adjusted and the image can be re-output without reading the original again.

Many books and books that are generally issued have a size other than the standard size such as copy paper such as A series and B series, and the vertical and horizontal lengths of the pages and the ratio thereof are not constant. Further, even if the cover size of the original document is a standard size, the page size of the spread original document is reduced in the page spread direction due to the binding margin and distortion of the binding portion. Further, the image may be displaced depending on the setting position at the time of copying the original document, may be bent and set in the reading scanning direction, or the image may be skewed. This occurs not only in the case of reading a document on a document table in the related art but also in this apparatus to a large extent due to a change in page position due to setting of a book and turning of pages.
Therefore, by detecting the page size and page position of the original document and erasing the image of the outer frame portion of the page as standard, the page outside the page of the original document can be detected regardless of changes in the page size and the original document placement position. The image will not be copied black.

However, the page size and page position may not be detected due to the gravure or the like of the page image of the original document, or the page may be erroneously detected and the image portion may be erased. Further, in a thick original document, a distorted portion due to a shadow or a curve of the binding portion may be applied to the image portion. At that time, by forming an image on the entire surface of the transfer paper in the whole image mode regardless of the detected page size, it is possible to form an image on the entire transfer paper and prevent image loss.

Many books and books that are generally issued have a size other than the standard size such as copy paper such as A series and B series, and the vertical and horizontal lengths of pages and the ratio thereof are not constant. Further, even if the cover size of the main document is a standard size, the page size of the double-page spread original is reduced in the page spread direction due to the binding margin and distortion of the binding portion. When an original of a page smaller than the paper size is copied in the full-screen image mode, a black solid portion is formed outside the page range. This not only makes the copied image unsightly, but also consumes a large amount of waste toner,
It also puts a load on the copying process such as cleaning. Therefore, the full-page image mode designation is used in the case of a special original document, and the full-page image mode designation is enabled at the time of canceling the binding part image erasing setting and the page peripheral part image erasing setting, so that the binding part image It is possible to make it difficult to perform image formation in the full-screen image mode by erasing the binding portion image and the page peripheral portion image as a standard by giving priority to the erasing setting and the page peripheral portion image erasing setting. In addition, it is possible to prevent the standard use of the full-screen image mode with the full-screen image mode being specified without knowing the cancellation of the full-screen image mode.

Many books and books that are generally issued have a size other than the standard size such as copy paper such as A series and B series, and the vertical and horizontal lengths of pages and the ratio thereof are not constant. Further, even if the cover size of the original document is a standard size, the page size of the spread original document is reduced in the page spread direction due to the binding margin and distortion of the binding portion. When an original of a page smaller than the paper size is copied in the full-screen image mode, a black solid portion is formed outside the page range. Therefore, by detecting the page size and page position of the original document and erasing the image outside the page range, it is possible to make the copy easy to see only with the page image information and to avoid wasting toner. Moreover, it is possible to prevent an overload of the copying process such as cleaning.

By erasing the image outside the page range as standard (even when the center erasure and the frame erasure are canceled), the image outside the page range can be erased without the operator being aware of it. This enhances the appearance of the copied page image and the effect of toner consumption.

Depending on the size of the original and the image position,
The desired image deletion is different. Further, the binding portion and the image forming portion cannot be understood until the shade is output until the image is output. In particular, since the apparatus performs page turning scanning after reading scanning, the page must be manually returned to read the previous page again. Therefore, the original document is read, the read image data is stored in the memory, the pages of the original document are turned, the page size and position are detected during page turning scanning, the image data is read from the memory, and the above detection result is read from the read image data. By deleting the image data of the binding portion and the edge of the page based on the above, and forming an image by the image data after the deletion, even in a system such as this apparatus that detects the page range after reading the original, The image can be erased. Moreover, since the image data from the memory is processed without performing the reading scanning again,
It is possible to change the image erasing setting and the erasing width after scanning this original.

The present apparatus is intended for a left-turning (left cover) original manuscript with a relatively high ratio of horizontal writing, but there is also a vertical writing right-turning original manuscript. In this case, the document image forming apparatus may be arranged symmetrically with respect to the apparatus, and the right and left pages are opposite to the above. Therefore, even if the left and right pages and edges of the apparatus are different, they are included in the present invention.

[0352]

As described above, according to the first aspect of the invention, in the main document image forming apparatus for reading the main document and forming the image of the read page, the detection for detecting the page size and the page position of the main document is performed. Means for erasing the image of the outer frame portion of the page by the output signal of the detecting means so as not to form an image of the outer frame portion of the page. The image outside the page is not copied in black.
Further, by deleting the image of the page frame portion based on the page reference of the original document, the page image is not lost regardless of the image arrangement at the time of copying such as the image reference mode.

According to the second aspect of the invention, in the main document image forming apparatus for reading the main document and forming the image of the read page, the detecting means for detecting the page edge of the main document, and the output of the detecting means. The top edge of the page of the spread book manuscript due to the signal,
A page end image erasing means is provided for erasing so as not to form an image of a predetermined width inside the page edge with respect to the bottom edge of the page, the left edge of the page, and the right edge of the page. It is possible to prevent the occurrence of the black portion of the image outside the page of the original at the upper end portion of the page, the lower end portion of the page, the left end portion of the page, and the right end portion of the page without missing the image in the page.

According to the third aspect of the present invention, the reading means for reading the main document, the image forming means for forming the image of the page read by the reading means, and the pages of the main document are attracted to store the predetermined pages. In the original document image forming apparatus having a page turning means for carrying out page turning by discharging from the page storing section after being stored in a page storing section and a page detecting means for detecting a page storing timing and a page discharging timing of the page storing section The page right edge and the page left edge of the original document are detected according to the page storage timing and the page discharge timing detected by the page detection unit so that the image of the predetermined area of the page right edge and the page left edge of the two-page spread original is not formed. Since the page edge image erasing means for erasing is provided, it is possible to accurately erase the image outside the left and right edges of the page of the original document regardless of the change of the page position of the original document due to repeated page turning.

According to the fourth aspect of the present invention, in the original document image forming apparatus according to the third aspect, the page edge image erasing means causes the page right edge portion and the page left edge portion of the original document for each page turning of the original document. Is detected to determine the image erasing areas at the right edge of the page and the left edge of the page of the two-page spread original, the error in the erasing position is 1 mm.
The level is within the range of no problem, and more accurate image erasing can be performed at the page position.

According to the fifth aspect of the present invention, in the main document image forming apparatus for scanning and reading the main document to form an image of the read page, the read data of the two-page spread original document indicates the direction toward the upper end of the page of the two-page spread document. Since the image upper end image erasing means for detecting the image range of the above, determining the image erasing region at the upper end of the page of the two-page spread original document from this image range and erasing so as not to form an image in this image erasing region, It is possible to prevent useless black solid portions from being formed without adding other detection means.

According to the sixth aspect of the invention, in the document image forming apparatus according to the fifth aspect, the page upper end erasing means detects the image range in the upper edge direction of the spread book document. Since the reading scanning is performed at the first time, it is possible to omit the detection process and the time for detecting the image range of the two-page spread original in the direction toward the upper end of the page.

According to the invention of claim 7, claim 1,
In the original document image forming apparatus described in 2, 3, 4, 5 or 6, since the image erasing area is a uniform strip-shaped area parallel to each page end direction of the original document, the page frame portion of the original document is erased. This can be performed in synchronism with the gate signals corresponding to the vertical and horizontal directions of the original, and the erasing method is easy and the setting of the erasing range is easy to understand.

According to the eighth aspect of the invention, in the book document image forming apparatus for reading the spread book document placed with the lower end of the page as a reference and forming the read image, the spread book document is arbitrarily set from the reference of the spread book document. Since the erasing means for erasing the image at the lower end of the page of the set width is not provided, the image erasing at the lower end of the page becomes a fixed reference from the reading main scanning direction, and the image at the lower end of the page can be easily erased. Become.

According to the ninth aspect of the invention, in the main document image forming apparatus for scanning and reading the main document to form the image of the read page, the detecting means for detecting the binding portion position of the double-spread book document, Since the binding portion image erasing means for erasing the image at the binding portion position of the two-page spread original document by the output signal of the detection means is provided, the image of the binding portion of the original document is not copied black or dark.

According to the tenth aspect of the present invention, in the main document image forming apparatus for scanning and reading the main document to form an image of the read page, a detecting means for detecting the spread page joining position of the two-page spread original, Since the erasing means is provided for erasing so as not to form images of the same width on the left and right pages of the original document based on the spread page joining position detected by the detecting means, the image erasing suitable for the original document can be performed. , It is easy for the operator to understand the image deletion of the symmetrical width of the left and right pages.

According to the invention of claim 11, in the document image forming apparatus of claim 8, 9 or 10,
Since the two-page spread original document is placed vertically to the scanning direction and the image erasing area of the original document is a uniform strip-shaped area parallel to the closing direction of the original document, it is possible to optimally erase the binding portion. . In addition, the erase area has a uniform width, and it is possible to erase the image of the binding area in synchronization with the gate signals corresponding to the vertical and horizontal directions of the original document.This erase method is easy and the erase range can be set easily. easy.

According to the twelfth aspect of the present invention, in a book document image forming apparatus for scanning and reading a book document to form an image of a read page, erasing is performed so as not to form an image at the binding portion position of a spread book document. Binding portion image erasing means for
An erasing width setting means for setting the image erasing width of the binding portion image erasing means is provided, and the setting of the image erasing width by the erasing width setting means gives an instruction based on a two-page spread original document. Thus, the binding portion erasing suitable for the original document can be performed, and the operator can easily set the binding portion erasing width.

According to the thirteenth aspect of the present invention, in the original document image forming apparatus for reading the original document and forming the image of the read page, the binding portion image is erased so as not to form the image of the binding portion of the two-page spread original document. An erasing means and a page-peripheral image erasing means for erasing so as not to form an image of the page-periphery portion of the two-page spread original, setting for erasing the binding-part image of the binding-part image erasing means, and the page-periphery image Since the setting for erasing the image around the page of the erasing means is made independent, the setting for erasing the image for the binding portion and the setting for erasing the image for the page peripheral portion can be independently instructed and selected according to the original.

According to the fourteenth aspect of the present invention, in the original document image forming apparatus for reading the original document and forming the image of the read page, the binding portion image is erased so as not to form the image of the binding portion of the two-page spread original document. Erasing means, image erasing setting means for setting erasing of the binding portion image of the binding portion erasing means, designation means for designating erasing of the binding portion image of the binding portion image erasing means by default, and binding portion image by the designation means Since the erasing means for erasing the erasing designation is provided, the erasing of the binding portion suitable for almost all cases can be automatically performed. Moreover, in the rare case where an image defect occurs, the page image can be copied without losing the image information by judging the copy image and canceling the setting for erasing the image of the binding portion.

According to the fifteenth aspect of the present invention, in the main document image forming apparatus for reading the main document and forming the image of the read page, the perimeter of the page to be erased so as not to form the image of the page peripheral part of the two-page spread main document. A partial image erasing means, an image erasing setting means for setting the page peripheral area image erasing of the page peripheral area image erasing means, and a designating means for designating the page peripheral area image erasing of the page peripheral area image erasing means by default, Since the canceling means for canceling the designation of erasing the image around the page by the designating means is provided, it is possible to automatically perform the erasing of the page edge suitable for most cases. Moreover, in the rare case where an image defect occurs, the page image can be copied without losing the image information by canceling the setting for erasing the image around the page, judging from the copy.

According to the sixteenth aspect of the present invention, in the main document image forming apparatus for reading the main document and forming the image of the read page, the image forming means for forming the left and right page images of the two-page spread original document for each page. , Binding part image erasing means for erasing the image of the binding part of the two-page spread original document, binding part image erasing setting means for setting the binding part image erasing of the binding part erasing means, and the page periphery of the two-page spread original document Page peripheral image erasing means for erasing so as not to form a partial image, and page peripheral area image erasing of this page peripheral portion image erasing means is set, and the image of the left and right pages of the two-page spread original document is set for each page by the image forming means. In the case of forming a double-page spread document, since the page periphery image deletion setting means for setting the right edge of the left page and the left edge of the right page is provided,
Even when the binding portion position is formed at the end portion, the binding portion image erasing can be preferentially executed based on the binding portion position of the original document.

According to the seventeenth aspect of the present invention, the reading means for reading the original document, the storing means for storing the image data read by the reading means, and the image forming for reading the image data from the storing means to form an image. Means and
A binding portion image erasing unit for erasing the binding portion image of the double-page spread original document, a binding portion image erasing setting unit for setting the binding portion image erasing of the binding portion erasing unit, and a page peripheral portion of the double-page spread original document The page periphery image erasing means for erasing so as not to form the image and the page periphery image erasing setting means for setting the page periphery image erasing of this page periphery image erasing means, Since it is possible to set and cancel the image erasing after reading, the operator can change the image erasing selection on the way. Further, in the case where an image dropout occurs in image formation or image erasing is not suitable, it is possible to re-form an image by changing only the image erasing without changing the original reading.

According to the eighteenth aspect of the present invention, in the original document image forming apparatus for reading the original document and forming the image of the read page, the binding portion image is erased so as not to form the image of the binding portion of the two-page spread original document. Erasing means, page peripheral portion image erasing means for erasing so as not to form an image of the page peripheral portion of the two-page spread original document, binding portion erasing width varying means for varying the erasing width of the binding portion image, and the page peripheral portion Since the erasing width varying means for changing the erasing width of the image is provided, it is possible to obtain an image having an appropriate erasing width by setting an arbitrary erasing width within a range without image loss according to the original document. . In general, since the image position on the page of the original document is constant in the original document, it is sufficient and effective to initialize the erasing width according to the original document.

According to the invention of claim 19, claim 1
In the original document image forming apparatus described in 7 or 18, since the setting value of each erasing width at the default is set to 2 mm or more,
Even if there is misalignment or skew due to the setting of this document, the black area around the page and the binding area can be erased with priority. This is a value that the margin of the page and the black portion of the binding portion are surely within the range even if the erasing position shifts due to the detection error of the page end portion or the binding portion position or the control accuracy. Further, by initializing a value that does not cause image loss based on the position characteristics of the page image, the operator can omit the operation without being aware of erasing the black areas around the page and the binding portion.

According to the twentieth aspect of the present invention, in the original document image forming apparatus for reading the original document and forming the image of the read page, the binding portion image is erased so as not to form the image of the binding portion of the two-page spread original document. Erasing means, first erasing width setting means for setting a binding portion image erasing width of the binding portion erasing means, and page peripheral portion image erasing means for erasing so as not to form an image of the page peripheral portion of a two-page spread original document. Second erasing width setting means for setting the image erasing width at the upper end of the page of the peripheral image erasing means, and third erasing width setting for setting an image erasing width at the lower end of the page of the peripheral image erasing means Means and fourth erasure width setting means for setting a right page right edge image erasing width and a left page left edge image erasing width of the page peripheral area image erasing means,
Since each erasure width is set independently, the image erasure width in each direction around the page of the original document can be set to an arbitrary width according to the original document, and an image with an appropriate erasure width that does not cause image loss or black areas can be created. Obtainable. Further, the distances from the left edge of the page and the right edge of the page to the image edge are generally almost equal. Therefore, by setting the erase widths of the left edge of the page and the right edge of the page to the same erase setting width, the operation becomes easy.

According to the twenty-first aspect of the invention, the reading means for reading the original document, the storing means for storing the image data read by the reading means, and the image forming for reading the image data from the storing means to form an image. Means and
Binding portion image erasing means for erasing the binding portion image of the double-page spread original document, binding portion image erasing width setting means for setting the binding portion image erasing width of the binding portion erasing means, and pages of the double-page spread original document A page peripheral portion image erasing means for erasing without forming an image of the peripheral portion, and a page peripheral portion image erasing width setting means for setting the page peripheral portion image erasing width of the page peripheral portion image erasing means, Since it is possible to set and change the image erasing width during or after reading the original, the operator can change the erasing width on the way. In addition, when an image is missing in the image output or the erasing is not suitable, the erasing width can be finely adjusted and the image can be re-formed without reading the original again.

According to the twenty-second aspect of the present invention, the reading means for reading the original document, the image forming means for forming the image of the read page on the image receiving member, and the detecting means for detecting the page size and page position of the original document. In the original document image forming apparatus which has the original document and erases it so as not to form an image outside the page range normally detected by the detecting means, an image is received regardless of the page size detected by the detecting means. Since the setting means for forming an image on the entire surface of the member is provided, the image outside the page of the original document is not formed black regardless of changes in page size and page position.

According to the twenty-third aspect of the present invention, the reading means for reading the main document, the image forming means for forming the image of the read page on the image receiving member, and the erasing so as not to form the image of the binding portion of the two-page spread original document. Binding portion image erasing means for
The binding portion image erasing setting means for setting the binding portion image erasing of the binding portion erasing means, the page peripheral portion image erasing means for erasing without forming the image of the page peripheral portion of the double-page spread original, and the page peripheral portion image In the original document image forming apparatus having a page periphery image erasure setting unit for setting the page periphery image erasure of the erasing unit and a setting unit for forming an image on the entire surface of the image receiving member, the binding unit image erasure setting and the page periphery are set. Since the setting of image formation on the entire surface of the image receiving member is enabled when the setting of erasing the partial image is canceled, the erasing setting of the binding portion image and the erasing setting of the peripheral portion image of the page are given priority as standard to erase the binding image and page. The peripheral image can be erased to make it difficult to form the entire image. Moreover, it is possible to prevent the standard full-scale image formation from being performed while the full-scale image formation is still set without knowing the setting cancellation of the full-scale image formation.

According to the invention of claim 24, claim 2
In the document image forming apparatus according to the third aspect, the image is erased so that the image outside the page range is not normally formed by the erasing means, so that the image outside the page range can be erased without the operator being aware of it. This enhances the appearance of the page image and the effect of toner consumption.

According to the twenty-fifth aspect of the present invention, in the original document image forming apparatus for reading the original document and forming the image of the read page, the detecting means for detecting the page size and the page position of the original document, and the detecting means. Since it has an erasing means for erasing so as not to form an image outside the page range detected in
It is possible to make the formed image easy to see only by the page image information and to eliminate wasteful toner consumption. Moreover, it is possible to prevent overload of the image forming process such as cleaning.

According to the twenty-sixth aspect of the present invention, there is provided a main document image forming method for reading the main document, forming an image of the read page, and turning the page of the main document. Is stored in the storage means, the pages of this manuscript are turned, and the page size and position are detected when turning the pages.
The image data is read from the storage means, the image data of the binding portion and the page edge portion of the main document is erased from the read image data based on the detection result, and the image is formed by the read image data after the erasure. Even when the page range is detected after reading, the image can be erased from the first output. Further, by processing the image data from the storage means without performing the reading scan again, it is possible to change the image erasing setting and the erasing width after reading the original document.

[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 block diagram showing a part of a data processing block of the system.

FIG. 3 is a cross-sectional view showing an outline of a document table pressure fixing switching device of the system.

FIG. 4 is a plan view showing an outline of a book placement table in the TPS of the system.

FIG. 5 is a perspective view schematically showing a size stopper that positions the left and right document trays of the document tray unit of the system according to the size of the original document.

FIG. 6 is a plan view showing the outline of the same size stopper.

FIG. 7 is a perspective view schematically showing a unit opening / closing lock mechanism for opening / closing a scanner unit with respect to the original table unit of the TPS.

FIG. 8 is a side view schematically showing the unit opening / closing lock mechanism.

FIG. 9 is a perspective view showing a document table pressure fixing switching device of the document table unit.

FIG. 10 is a cross-sectional view showing an outline of the document table pressure fixing switching device.

FIG. 11 is a perspective view showing a component of the platen pressurization fixing switching device.

FIG. 12 is a perspective view showing an outline of a driving unit of the platen pressurization fixing switching device.

FIG. 13 is a plan view showing an outline of the document table pressure fixing switching device.

FIG. 14 is a schematic cross-sectional view showing an overall configuration of a device body in the TPS.

FIG. 15 is a side view schematically showing a document table lower retracting operation in the TPS.

FIG. 16 is a timing chart showing the timing of a downward retracting operation of the document table in the TPS.

FIG. 17 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. 18 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. 19 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. 20 is a diagram showing a transition of the scanning unit during image reading of the right page of the original or during turning of the right page in the pressure / fixing operation mode of the original table.

FIG. 21 is a diagram showing a transition at an image reading completion position or a page turning start position of the scanning unit in the pressure / fixing operation mode of the document table.

FIG. 22 is a timing chart showing operation timings of the scanner motor and the left and right document table raising / lowering motors in the operation mode of pressing and fixing the document table.

FIG. 23 is a schematic plan view showing a drive mechanism of a scanning unit in the scanner unit.

FIG. 24 is a cross-sectional view showing an outline of a scanning unit in the scanner unit.

FIG. 25 is a schematic sectional view showing a structure of a sheet winding roller of the scanning unit.

FIG. 26 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. 27 is a schematic cross-sectional view showing the positional relationship between the document pressing roller and the platen glass of the image reading section of the scanning unit.

FIG. 28 is a schematic sectional view showing the positional relationship between the platen glass and the glass holder of the image reading section in the scanning unit.

FIG. 29 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 material document scanning side.

FIG. 30 is a sectional view schematically showing the scanning unit in a state where the switching mirror is driven to switch the optical path of the scanning optical system in the scanning unit from the main document scanning side to the sheet original scanning side.

FIG. 31 is a cross-sectional view schematically showing a scanning unit showing another driving means of the switching mirror.

FIG. 32 is a cross-sectional view schematically showing a main part of a scanning unit, which shows a page turning operation of the scanning unit in the TPS.

FIG. 33 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. 34 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. 35 is a diagram showing a transition at the right page turning start position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 36 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. 37 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. 38 is a diagram showing a transition of the scanning unit in the course of discharging a right page in the page turning operation mode of the scanning unit.

FIG. 39 is an explanatory diagram of the charging timing of the image reading unit and the turning belt at the right page image reading completion position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 40 is a schematic side view showing a support structure of the scanning unit with respect to the scanner unit.

FIG. 41 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. 42 is a schematic perspective view for explaining the positional relationship between the turning belt and the page feed roller in the scanning unit.

FIG. 43 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. 44 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. 45 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. 46 is a cross-sectional view showing an image forming unit of the system.

FIG. 47 is a plan view showing an example of setting an original document of the TPS.

FIG. 48 is a side view showing a main document page storage detection unit of the TPS.

FIG. 49 is a plan view showing a part of the operation unit of the system.

FIG. 50 is a plan view showing another part of the operating portion of the system.

FIG. 51 is a diagram showing a page image range of a read spread book document of the system.

FIG. 52 is a diagram showing a page image layout in a main document image reference mode of the system.

FIG. 53 is a diagram showing another page image layout in the original document image reference mode of the system.

FIG. 54 is a time chart for explaining a reading sub-scanning direction range of a main document image and a layout method thereof in the system.

FIG. 55 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. 56 is a time chart showing the copy operation timing in the main document copy mode of the system.

FIG. 57 is a timing chart showing the timing of main document mode operation during spread output / 1 to 1 copy mode continuous scanning in the same TPS.

FIG. 58 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. 59 is a timing chart showing the timing of main document mode operation in the independent page output / two-copy mode in the same TPS.

FIG. 60 is a plan view showing a part of the operation section.

FIG. 61 is a flowchart showing a copy format selection flow of the above system.

FIG. 62 is a flowchart showing a reading selection flow of the above system.

FIG. 63 is a diagram showing read data for the main document by the read sensor in the TPS.

FIG. 64 is a block diagram showing an end image detection circuit of the main document in the sub-scanning direction of the TPS.

FIG. 65 is a block diagram showing an end image detection circuit of the main document in the main scanning direction of the TPS.

FIG. 66 is a plan view showing an example of the main document set of the TPS.

FIG. 67 is a diagram showing read data of the original document by the reading sensor.

68 is a flow chart showing an erase mode flow of the above system. FIG.

FIG. 69 is a diagram showing a guidance display example of the system.

FIG. 70 is a diagram showing an erased image in the independent page copy mode of the system.

71 is a diagram showing an erased image in the spread page copy mode of the system. FIG.

FIG. 72 is a diagram showing a gate signal in the image effective range of the system.

FIG. 73 is a diagram showing a standard erased image of the system.

FIG. 74 is a diagram showing an erased image in the full-screen image mode of the system.

FIG. 75 is a block diagram showing an image erasing circuit of the system.

[Explanation of symbols]

 101 Reading Sensor 102 VPU 103 IPU 104 Frame Memory 200 Scanning Unit 208 Turning Belt 501 Printer

Claims (26)

[Claims] 1. A book document image forming apparatus for reading a book document and forming an image of a read page, a detecting means for detecting a page size and a page position of the book document, and an outer frame of a page by an output signal of the detecting means. A document image forming apparatus according to claim 1, further comprising: an outer frame portion image erasing unit for erasing an image of a set so as not to form the image. 2. A book document image forming apparatus for reading a book document and forming an image of a read page, and detecting means for detecting a page end portion of the book document, and an upper end of a page of a spread book document by an output signal of the detecting means. Section, the bottom edge of the page, the left edge of the page, and the right edge of the page, respectively, are provided as page edge image erasing means for erasing without forming an image of a region of a predetermined width inside the page edge. This original document image forming apparatus. 3. A reading unit for reading the original document, an image forming unit for forming an image of the page read by the reading unit, a page of the original document is adsorbed and stored in a predetermined page storage unit, and then this page is stored. In the original document image forming apparatus having page turning means for turning the pages out of the storage section and turning the pages, and page detection means for detecting the page storage timing and page discharge timing of the page storage section, the page detection means detects the page. The right edge and the left edge of the page of this document are detected according to the page storage timing and the page ejection timing, and the page edge image is erased so as not to form the image in the predetermined area of the page right edge and the page left edge of the two-page spread document. An original document image forming apparatus comprising means. 4. The book original image forming apparatus according to claim 3, wherein the page edge image erasing means detects the right edge and the left edge of the page of the original every time the page of the original is turned over. A document image forming apparatus according to the present invention, which determines an image erasing area at a right end portion and a left end portion of a page. 5. An original document image forming apparatus for scanning and reading an original document to form an image of a read page detects an image range of a two-page spread original document in a direction toward an upper end of a page based on read data of the two-page spread original document. An image forming apparatus for the original document, comprising an image erasing unit for deciding an image erasing region at the upper end of the page of the two-page spread original document from the image range and erasing so as not to form an image in the image erasing region. . 6. The book document image forming apparatus according to claim 5, wherein the page upper end erasing means detects the image range in the page upper end direction of the spread book document and performs the scanning of the book spread original document for the first time. A feature of the original document image forming apparatus. 7. The image forming apparatus according to claim 1, 2, 3, 4, 5 or 6, wherein the image erasing area is a uniform strip-shaped area parallel to each page end direction of the original. A feature of the original document image forming apparatus. 8. A book document image forming apparatus for reading a spread book document placed on the basis of a page bottom part and forming a read image, wherein a page bottom part having a width arbitrarily set from the reference of the spread book document. The original document image forming apparatus, which is provided with an erasing unit that erases the image so that the image is not formed. 9. A book original image forming apparatus which scans and reads a book original to form an image of a read page, and detecting means for detecting a binding portion position of the book spread original document and a book spread book based on an output signal of the detecting means. An original document image forming apparatus, comprising: a binding portion image erasing unit that erases an image at a binding portion position of an original so as not to form the image. 10. A book document image forming apparatus for scanning and reading a book document to form an image of a read page, a detecting unit for detecting a spread page joining position of a spread book document, and a spread page detected by the detecting unit. An original document image forming apparatus, comprising: an erasing unit for erasing an image having the same width on the left and right pages of the original document based on the joining position. 11. The book document image forming apparatus according to claim 8, wherein the spread book document is placed perpendicular to the scanning direction for reading, and the image erasing area of the book document is parallel to the closing direction of the book document. This original image forming apparatus is characterized in that a uniform strip-shaped area is formed. 12. A binding part image erasing means for erasing a book page image in a book page image forming apparatus for scanning and reading a book page document to form an image of a read page without forming an image at a binding part position of a spread book page document. An original document image characterized by having an erase width setting means for setting an image erase width of the binding portion image erasing means, and instructing on the basis of a two-page spread original document by setting the image erase width by the erase width setting means. Forming equipment. 13. A bookbinding image erasing means for erasing a bookbinding document image forming apparatus for reading a bookbinding document and forming an image of a read page and erasing the binding page image of a bookbinding document original so as not to form an image of the binding section. A page peripheral portion image erasing means for erasing so as not to form an image of the page peripheral portion, setting of binding portion image erasing of the binding portion image erasing means, and page peripheral portion image erasing of the page peripheral portion image erasing means This document image forming apparatus is characterized in that it is set independently of the above setting. 14. A binding portion image erasing device for erasing a binding portion of a double-spread original document so as not to form an image of a binding portion in a book document image forming apparatus for reading a document and forming an image of a read page, and this binding portion erasing. An image erasing setting means for setting the erasing of the binding portion image of the means, and a designating means for designating the erasing of the binding portion image of the binding portion image erasing means by default;
A document image forming apparatus according to the present invention, further comprising: a canceling unit that cancels the designation of erasing the image of the bound portion by the designating unit. 15. A page-periphery image erasing unit for erasing a page-of-page image of a two-page spread original document in a book-document image forming apparatus for reading the document and forming an image of the read page, and this page. Image erasure setting means for setting erasure of the page periphery image of the periphery image erasing means, designation means for designating deletion of the page periphery image of the page periphery image erasing means by default, and page periphery image by the designation means A document image forming apparatus according to the present invention, further comprising a canceling unit for canceling the designation of erasing. 16. A book document image forming apparatus for reading a book document and forming an image of a read page, comprising: an image forming means for forming an image of right and left pages of a book spread document on a page-by-page basis; A binding portion image erasing means for erasing without forming an image, a binding portion image erasing setting means for setting binding portion image erasing of the binding portion erasing means, and an image around a page of a two-page spread original document are not formed. The page peripheral image erasing means to be erased and the page peripheral image erasing of the page peripheral image erasing means are set, and when the image forming means forms the images of the left and right pages of the two-page spread original, page by page This document image forming apparatus further comprises a page peripheral image erasing setting means for setting the right edge of the left page and the left edge of the right page. 17. A reading unit for reading the original document, a storage unit for storing the image data read by the reading unit, an image forming unit for reading the image data from the storage unit to form an image, and binding of a two-page spread original document. Binding portion image erasing means for erasing so as not to form an image of a copy, binding portion image erasing setting means for setting binding portion image erasing of the binding portion erasing means, and an image of a peripheral portion of a page of a two-page spread original document is not formed Image erasing means for erasing as described above, and page fringe image erasing setting means for setting erasing of the page fringe image of the page fringe image erasing means, and erasing the image during or after reading the original document. This document image forming apparatus is capable of setting and canceling the setting. 18. In a book document image forming apparatus for reading a book document and forming an image of a read page, a binding portion image erasing unit for erasing a binding portion image of a spread book original so as not to form an image, and a booklet document erasing means. Peripheral image erasing means for erasing without forming an image around the page, binding portion erasing width varying means for varying the erasing width of the binding portion image, and page for varying the erasing width of the peripheral image A document image forming apparatus according to the present invention, characterized in that it comprises a peripheral erasure width varying means. 19. The original document image forming apparatus according to claim 17 or 18, wherein a default setting value of each erasing width is 2 mm or more. 20. A binding portion image erasing means for erasing a binding portion image of a spread book document in a binding document image forming apparatus for reading a binding document and forming an image of a read page, and erasing the binding portion. First erasing width setting means for setting the binding portion image erasing width, page peripheral portion image erasing means for erasing without forming an image of the page peripheral portion of the two-page spread original, and the page peripheral portion image erasing means. Second erasure width setting means for setting the image erasing width of the upper edge of the page, third erasing width setting means for setting the image erasing width of the lower edge of the page of the image surrounding area of the page, The original document image, characterized in that it has a right page right edge image erasing width and a left page left edge image erasing width of the erasing means, and a fourth erasing width setting means for setting the erasing widths independently. Forming equipment. 21. A reading unit for reading a main document, a storage unit for storing image data read by the reading unit, an image forming unit for reading image data from the storage unit to form an image, and binding of a two-page spread original document. Binding portion image erasing means for erasing so as not to form an image of a copy, binding portion image erasing width setting means for setting a binding portion image erasing width of the binding portion erasing means, and an image of a page peripheral portion of a two-page spread original document. It has a page peripheral image erasing means for erasing so as not to form and a page peripheral image erasing width setting means for setting the page peripheral image erasing width of the page peripheral image erasing means. A document image forming apparatus, wherein the image erasing width can be set and changed after reading. 22. A main document having a reading unit for reading the main document, an image forming unit for forming an image of a read page on an image receiving member, and a detection unit for detecting the page size and page position of the main document. In this document image forming apparatus that erases so as not to form an image outside the page range detected by the detection unit as standard, an image is formed on the entire surface of the image receiving member regardless of the page size detected by the detection unit. A document image forming apparatus according to the present invention, which comprises setting means. 23. A reading unit for reading the original document, an image forming unit for forming an image of the read page on an image receiving member, and a binding unit image erasing unit for erasing the image of the binding unit of the two-page spread original document so as not to form the image. The binding portion image erasing setting means for setting the binding portion image erasing of the binding portion erasing means, the page peripheral portion image erasing means for erasing without forming the image of the page peripheral portion of the double-page spread original, and the page peripheral portion image A page periphery image erasing setting means for setting the page periphery image erasing of the erasing means,
In this document image forming apparatus having a setting unit for forming an image on the entire surface of the image receiving member, the setting of image forming on the entire surface of the image receiving member is made effective when the setting for erasing the image of the binding portion and the setting for erasing the image of the peripheral portion of the page are canceled. A document image forming apparatus according to the present invention. 24. The original image forming apparatus according to claim 23, wherein the erasing means normally erases the image so that an image outside the page range is not formed. 25. In a book document image forming apparatus for reading a book document and forming an image of a read page, a detecting means for detecting the page size and page position of the book document, and an image outside the page range detected by the detecting means. An original document image forming apparatus, comprising: an erasing unit for erasing so as not to form a sheet. 26. A book document image forming method for reading a book document, forming an image of a read page, and turning a page of the book document, wherein the book document is read, and read image data is stored in a storage means. Turning the pages of the original, detecting the size and position of the page when turning the pages, reading the image data from the storage means, and reading the image data from the read image data based on the detection result, the image data of the binding portion and the page edge of the original. A method for forming an original image, which comprises erasing and forming an image by the read image data after the erasing.