JP2004284750A - Paper sheet post-treating method, its device, and image formation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet post-treating method, a device for it, and an image formation system capable of performing such a processing as concealed stapling of a booklet or sack binding of specific pages. <P>SOLUTION: The sheet post-treating device is structured so that sheets S of paper with images formed thereon are stacked on a sheet placing table 161 in alignment, followed by a middle folding process in which a fold b is formed in the center in transporting direction of the sheets S by a middle folding device FS1, and a staple SP is struck by a sack binding device FS2 in the neighborhood of the sheet end on the side opposite the fold b, and the sack binding process of the sheets S is accomplished. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention receives sheets discharged from an image forming apparatus such as an electrophotographic copying machine, a printer, a facsimile, and a multifunction peripheral having these functions, and stacks the sheets in a sheet storage unit to perform folding processing, bag binding processing, and the like. The present invention relates to a sheet post-processing method for performing and discharging post-processing, a sheet post-processing apparatus, and an image forming system including the sheet post-processing apparatus.
[0002]
[Prior art]
After a large number of sheets on which images have been recorded by an image forming apparatus such as a copier, a printer, a facsimile, or a multifunction peripheral of these sheets, the sheets are collated for each number of copies and bound by binding means (staplers). A processing device is provided. The sheet post-processing apparatus is driven by being connected to a print function of the image forming apparatus.
[0003]
The image forming apparatus described in Patent Literature 1 forms two images on one side of a sheet having a size larger than the total size, and performs bag binding or weekly magazine folding. It is set to the position.
[0004]
The image forming apparatus described in Patent Literature 2 is capable of arbitrarily performing right binding and left binding in a document on which center folding and bag binding are performed.
[0005]
The image forming system described in Patent Literature 3 folds the image forming surface inward at a folding processing unit, and further binds a side end surface of the sheet opposite to the fold of the sheet at a binding processing unit.
[0006]
The image forming system described in Patent Literature 4 selects an in-fold mode in which the image surface of a sheet is folded inward in two, and an outer-fold mode in which the image surface is folded in two in the outer direction. On the other side, a bag binding process for concealment is performed.
[0007]
The simple envelope creating device described in Patent Document 5 automatically inserts an image-formed normal recording paper of about half the size of the cover recording paper into the two-folded cover recording paper, and inserts it into the simple envelope. To create.
[0008]
The document sorting device described in Patent Document 6 enables post-processing of sheets such as folding and binding of sheets, and folding and binding of covers, and facilitates returning and rearranging of documents.
[0009]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2001-157035 (Claims)
[0010]
[Patent Document 2]
JP-A-10-186754 (Claims)
[0011]
[Patent Document 3]
JP-A-10-194574 (Claims)
[0012]
[Patent Document 4]
Japanese Patent Application Laid-Open No. 2001-58758 (Claims)
[0013]
[Patent Document 5]
JP-A-6-127804 (Claims)
[0014]
[Patent Document 6]
JP-A-10-194608 (Claims)
[0015]
[Problems to be solved by the invention]
Some of the above post-processing apparatuses perform bag binding with the image side of the single-sided printing paper on the outside, and some perform image concealment binding with the image side on the inside. Further, there is a type in which a specific page can be concealed by selecting between an outer fold bag binding mode and an inner fold concealment binding mode for each sheet in one job.
[0016]
A sheet post-processing apparatus, a sheet post-processing method, and an image forming system according to the present invention aim to solve the following problems.
[0017]
(1) “Booklet concealment binding” that prevents others from seeing the image formed on the entire booklet, or folding the image with the image side inside so that the image content of a specific page is concealed and cannot be seen by others Provided is a sheet post-processing apparatus that enables a new print mode, a sheet folding function, and a bag binding function that can be set for double-sided printing paper to perform “specific page bag binding” for binding.
[0018]
(2) The booklet or the sheet on which the image surface is concealed by the bag binding is easily cut off as necessary, so that the inner image surface can be opened.
[0019]
(3) When the entire booklet is stapled, the misalignment of the sheets at the end of the booklet on the side of the stapling process is eliminated. In particular, significant irregularities occurring at the side edges of a large number of booklets are eliminated.
[0020]
[Means for Solving the Problems]
The above object is achieved by a sheet post-processing method, a sheet post-processing apparatus, and an image forming system of the present invention.
[0021]
(1) A sheet on which an image is formed is stacked on a sheet mounting table, aligned, and subjected to a center folding process by forming a fold at the center of the sheet in a conveying direction by a folding processing apparatus. A sheet post-processing method, wherein a staple is punched in the vicinity of an edge by a bag binding processing device, and the sheet is subjected to a bag binding process.
[0022]
(2) transport means for transporting the sheet discharged from the image forming apparatus onto the sheet mounting table, a folding processing apparatus for forming a fold at the center of the sheet in the transport direction, and performing center folding processing; A sheet post-processing apparatus, comprising: a bag binding processing device that hits a binding staple near a sheet edge to perform a bag binding process on the sheet.
[0023]
(3) An image forming apparatus including an image writing unit, an image forming unit, a sheet conveying unit, and a control unit, and a sheet post-processing unit including the folding processing unit, the bag binding processing unit, and the cutting processing unit according to the above (2). An image forming system comprising:
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a sheet post-processing method, a sheet post-processing apparatus, and an image forming system including the sheet post-processing apparatus of the present invention will be described with reference to the drawings.
[0025]
[Image forming system]
FIG. 1 is an overall configuration diagram of an image forming system including an image forming apparatus A, an image reading apparatus B, and a sheet post-processing apparatus FS including a center folding processing apparatus FS1, a bag binding processing apparatus FS2, and a cutting processing apparatus FS3. is there.
[0026]
<Image forming apparatus>
The image forming apparatus A includes a charging unit 2, an image exposing unit (writing unit) 3, a developing unit 4, a transferring unit 5A, a discharging unit 5B, a separating claw 5C, and a cleaning unit 6 around a rotating image carrier 1. After the surface of the image carrier 1 is uniformly charged by the charging unit 2, an exposure scan based on image data read from a document by the laser beam of the image exposure unit 3 is performed. A latent image is formed, and the latent image is reversely developed by the developing unit 4 to form a toner image on the surface of the image carrier 1.
[0027]
On the other hand, the paper S stored in the paper storage unit 7A is fed by the paper feeding unit 7B and sent to the transfer position. At the transfer position, the toner image is transferred onto the sheet S by the transfer unit 5A. Thereafter, the charge on the back surface of the sheet S is erased by the charge removing means 5B, separated from the image carrier 1 by the separation claw 5C, transported by the transporting means 7C, subsequently heated and fixed by the fixing means 8, and then discharged from the paper discharging means 7D. Is discharged.
[0028]
When image formation is performed on both sides of the sheet S, the sheet S heated and fixed by the fixing unit 8 is branched from the normal sheet discharge path by the transfer path switching plate 7E, and is switched back in the reverse transfer 7F to be turned upside down. Then, the sheet is discharged out of the apparatus by the sheet discharging means 7D. The sheet S discharged from the sheet discharge unit 7D is sent to the center folding processing device FS1.
[0029]
On the other hand, on the surface of the image carrier 1 after the image processing, the developer remaining on the surface is removed by the cleaning means 6 downstream of the separation claw 5C, and the surface is prepared for the next image formation.
[0030]
An operation unit 9 for selecting and setting an image forming mode and a sheet post-processing mode is arranged on the upper front side of the image forming apparatus A.
[0031]
Above the image forming apparatus A, an image reading apparatus B provided with an automatic document feeder of the original moving type reading system is installed.
[0032]
[Center folding device FS1]
FIG. 2 is a configuration diagram of a sheet post-processing apparatus FS including a center folding processing apparatus FS1, a bag binding processing apparatus FS2, and a cutting processing apparatus FS3.
[0033]
In the center folding processing device FS1, a first sheet feeding unit 11A, a second sheet feeding unit 11B, and a fixed sheet ejection table 12 are arranged at the upper stage in the figure, and a punching unit 13, a shift unit 14, and a sheet ejection unit 15 are arranged at the middle stage. The paper storage unit 16, the saddle stitching first binding unit 17, the perforation forming unit 18, and the center folding unit 19 are arranged in series on a substantially horizontal plane on the same plane which is substantially horizontal. Are located.
[0034]
Further, on the left side in the drawing of the center folding processing device FS1, an elevating sheet discharge table 151 for stacking the sheet S subjected to the shift processing and the sheet bundle subjected to the side binding processing is arranged.
[0035]
The receiving portion of the center folding device FS1 includes a sheet S that has been subjected to image forming processing from the image forming apparatus A, a slip sheet K1 that separates a sheet bundle supplied from the first sheet feeding device 11A, and a second sheet feeding device. The cover sheet K2 supplied from 11B is introduced.
[0036]
<Saddle stitching and center folding>
When the saddle stitching process and the center folding process are set in the operation unit 9, the image forming process is performed in the image forming apparatus A, and the image-formed sheet S sent to the center folding processing device FS <b> 1 is transported by the transport unit. The sheet is conveyed onto the sheet mounting table 161 of the sheet storage means 16 and is aligned at a predetermined position by the butting member 162 and the width alignment means (not shown).
[0037]
After the final sheet S is positioned and placed on the sheet placing table 161, the first binding unit 17 performs saddle stitching on the sheet bundle Sa including all pages. By this saddle stitching process, a staple is driven into the center of the sheet bundle Sa in the transport direction.
[0038]
After the saddle stitching process, the butting member 162 moves linearly in the downstream direction of the transport of the sheet bundle Sa. The movable abutting member 162 regulates the stop position of the sheet S during the saddle stitching process at the upper position, and regulates the stop position of the sheet bundle Sa during the center folding process at the lower position.
[0039]
The sheet bundle Sa having undergone the saddle stitching process descends along a conveyance path having a steep inclination of about 70 degrees, and the end of the sheet bundle Sa in the conveyance direction abuts against the abutting member 162, and stops at a predetermined position. The abutment member 162 can be moved to a predetermined position by setting the paper size and driving means.
[0040]
The center folding unit 19 includes a folding plate 191, a pair of folding rollers 192 and 193, a transport belt 194, and the like.
[0041]
The folding plate 191 moves obliquely downward and straight by the middle folding process start signal. The leading end of the folding plate 191 presses the central portion of the sheet bundle Sa in the transport direction, and pushes apart the holding portions of the folding rollers 192 and 193 via the sheet bundle Sa to separate them.
[0042]
When the folding plate 191 retreats after the leading end of the folding plate 191 has passed through the holding portions of the folding rollers 192 and 193, the central portion of the sheet bundle Sa is nipped and folded by the folding rollers 192 and 193, and the fold b Is formed. The fold b is formed on the same line as the driving position of the binding needle SP in the saddle stitching process.
[0043]
The sheet bundle Sa on which the saddle stitching process and the center folding process have been performed is conveyed by the conveyance belt 194 and sent to the bag binding device FS2.
[0044]
<Perforation forming process and center folding process>
When the perforation forming process and the bag binding process are set in the operating unit 9, the image forming process is performed in the image forming apparatus A, and the image-formed sheet S sent to the center folding processing device FS1 is transferred to the conveying unit. , And is conveyed onto the sheet placement table 161 of the sheet storage means 16, and is aligned at a predetermined position by the abutting member 162 and the width alignment means (not shown). The abutment member 162 is set such that the central portion of the sheet S is located at a predetermined intermediate position downstream of the saddle stitching position in the transport direction and upstream of the center folding position.
[0045]
After the sheet S is placed at a predetermined intermediate position on the sheet table 161, the perforation forming means 18 advances at the center of the sheet S to form a perforation a. This perforation is performed prior to the center folding process.
[0046]
FIG. 3 is a perspective view of the perforation forming means 18 and the sheet S on which the perforation a is formed. FIG. 4 is a perspective view showing a process of the sheet S on which a process of “booklet concealment binding” for preventing an image formed on the entire booklet from being seen by others. FIG. 4A is a perspective view showing a state where perforations a are formed on three sheets S.
[0047]
After the perforation is formed, the abutment member 162 descends on the paper table 161 and stops at the center folding processing position. The sheet S on which the perforations a are formed also descends on the sheet table 161, and its leading end is held and positioned by the abutting member 162.
[0048]
In the sheet S on which the perforations are formed, a fold b is formed by the folding plate 191 and the pair of folding rollers 192 and 193 in the center folding means 19.
[0049]
FIG. 4B is a perspective view showing a state in which a perforation a is formed on three sheets S, and then a folding process is performed to form a fold b.
[0050]
The sheet S that has been subjected to the perforation forming process and the center folding process is transported by the transport belt 194 and discharged to the bag binding apparatus FS2.
[0051]
[Bag binding device FS2]
The sheet S carried into the bag binding apparatus FS2 is conveyed by the rotating conveyance belt 21, and the center folded portion of the leading end of the sheet S comes into contact with the abutting member 22 to stop the advance. The sheet S is stapled by the second binding means 23 for binding the bag near the rear end of the sheet S opposite to the fold b of the sheet S stopped at the predetermined position.
[0052]
FIG. 4C is a perspective view illustrating a state in which the binding staple SP is stapled on the three sheets S that have been subjected to the center folding process, and FIG. 4D is a cross-sectional view.
[0053]
After the binding process, the abutment member 22 retracts to open the transport path, and the sheet S is transported by the transport belt 21 that has restarted to rotate, and is discharged to the cutting device FS3.
[0054]
[Cutting device FS3]
The cutting processing device FS3 includes a first conveying unit 31, a cutting unit 32, a second conveying unit 33, and a booklet storing unit 34.
[0055]
<First transport means 31>
The sheet bundle Sa that has undergone the saddle stitching process and the center folding process in the center folding device FS1 passes through the bag binding device FS2, and is carried into the first transport unit 31 of the cutting device FS3.
[0056]
The sheet bundle Sa on which perforations are formed in the center folding processing device FS1 and subjected to the center folding process is subjected to bag binding processing in the bag binding processing device FS2, and then is carried into the first transport means 31 of the cutting processing device FS3.
[0057]
The sheet bundle Sa conveyed in the first conveying means 31 is nipped and conveyed by conveying rollers 311 and 312 which are driven and rotated, and sent to the cutting means 32.
[0058]
<Cutting means 32>
The cutting means 32 includes a movable lower plate 321, a pressing roller 322, an upper cutting blade 323, a lifting / lowering driving means 324, a lower cutting blade 325, and a waste box 326.
[0059]
The leading end of the sheet bundle Sa carried into the cutting device FS3 passes through the first conveying means 31 and the cutting means 32 and is stopped at a predetermined position of the second conveying means 33.
[0060]
In a state where the rear end portion of the sheet bundle Sa in the stopped state is sandwiched between the movable lower plate 321 and the descending pressing roller 322, the upper cutting blade 323 is lowered by the lifting / lowering driving means 324, and the upper cutting blade 323 and The small edge c of the sheet bundle Sa is cut by the cutting lower blade 325, and the sheet bundle Sa is finished. The cutting waste d cut at the fore edge c is stored in the lower waste box 326.
[0061]
FIG. 4E is a cross-sectional view of the sheet bundle Sa after the cutting processing.
<Second transport unit 33>
The sheet bundle Sa cut and finished at the fore edge c by the cutting means 32 is introduced by the driving and rotating upper roller 331 in the second conveying means 33, and the rotating conveying belt 332 and the driven rotating pressing roller 333 And transported. The sheet bundle Sa conveyed in the horizontal direction by the conveyor belt 332 is guided vertically by the large-diameter roller 334, the guide plate 335, and the pinch roller 336 which are driven and rotated, and is conveyed vertically upward. , With the fore edge c facing down, the booklets are stored in tandem on the booklet loading table 341 of the booklet storage means 34.
[0062]
[Control of paper bundle concealment bag binding mode]
FIG. 5 is a block diagram of the image forming system.
[0063]
As shown in the figure, the image forming apparatus A includes an image forming apparatus control unit 100, a serial communication unit 101, an operation unit 9, an image forming unit 102, a paper storage unit 7A, a paper supply unit 7B, a conveyance unit 7C, and a screen data storage unit. The components are connected by a bus.
[0064]
The image forming apparatus control unit 100 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The CPU of the control means 100 reads the system program and the condition processing program stored in the ROM by operating the input means 9 and develops the program in the RAM, and centrally controls the operation of each unit of the image forming apparatus A according to the developed program. I do.
[0065]
The image forming apparatus control unit 100 sends a copy start signal to the sheet post-processing apparatus FS based on the operation of the image forming apparatus A and the output mode according to a data transmission / reception sequence during a copy operation described below with the post-processing apparatus control unit 110. A control signal such as a signal, a paper size signal, and a paper discharge signal is transmitted, and a paper discharge count, various types of alarm information (opening / closing of a door, binding staples, paper waste), and a jam detection notification are received from the paper post-processing device FS. The image forming apparatus A displays information of the post-processing apparatus on the display unit 9A of the operation unit 9 based on the received information.
[0066]
The serial communication unit 101 is configured by a serial communication interface (I / F) and the like, and exchanges control signals by serial communication between the image forming apparatus A and the sheet post-processing apparatus FS.
[0067]
The operation unit 9 includes a display unit 9A and an input unit 9B. The display unit 9A is configured by an LCD (Liquid Crystal Display), and displays various operation buttons, a status display of the apparatus, an operation status of each function, and the like on a display screen in accordance with an instruction of a display signal input from the image forming apparatus control unit 100. I do. The input means 9B is constituted by a pressure-sensitive (resistive pressure type) touch panel in which transparent electrodes are arranged in a grid pattern on the display screen of the LCD, and detects the XY coordinates pressed by a finger or a stylus with a voltage value. The position signal is output to the image forming apparatus control unit 100 as an operation signal. The input unit 9B includes various operation buttons such as a number button and a start button, and outputs an operation signal by a button operation to the image forming apparatus control unit 100.
[0068]
The image reading means B is provided with a scanner below the contact glass on which the document is placed, and reads an image of the document. The scanner is constituted by a light source, a CCD (Charge Coupled Device), and the like. The scanner reads an image of the original by forming a reflected light of light irradiated and scanned from the light source onto the original and photoelectrically converts the image, and reads the read image into the image forming unit 102. Output to Here, the image is not limited to image data such as figures and photographs, but also includes text data such as characters and symbols.
[0069]
The image forming unit 102 includes an image carrier 1, a charging unit 2, a developing unit 4, a fixing unit 8, and the like. In accordance with a print instruction from the image forming apparatus control unit 100, the size sheet input from the input unit 9A is used. When transported by the transporting means 7C, an electrostatic latent image of the image input from the image reading device B is formed on the surface of the image carrier 1. Further, the image forming unit 102 attaches toner to a region including the electrostatic latent image on the surface of the image carrier 1 and fixes the toner on the sheet S, and then discharges the sheet S to the sheet post-processing device FS.
[0070]
The paper storage means 7A for storing the paper S for transferring the image includes a paper presence / absence detection means 104 for detecting the presence / absence of the storage of the paper S, and a paper for detecting the size of the paper S stored in the paper storage means 7A. The image forming apparatus includes a size detecting unit 105 and outputs a detection signal to the image forming apparatus control unit 100.
[0071]
The paper feeder of the image reading apparatus B automatically feeds the originals stacked at the original set position onto the contact glass in accordance with an instruction from the image forming apparatus controller 100.
[0072]
The conveying unit 7C of the image forming apparatus A conveys the sheet S stored in the sheet storing unit 7A to the image forming unit 102 or the like in accordance with an instruction from the image forming apparatus control unit 100.
[0073]
The image data storage unit 103 is a memory for storing image data read by the image reading unit B, and is stored in a semiconductor memory (DRAM) or a magnetic disk (HDD).
[0074]
Next, the internal configuration of the sheet post-processing device FS will be described. The sheet post-processing apparatus FS includes a post-processing apparatus control unit 110, a serial communication unit 111, a detection unit 112, an adjustment value storage unit 113, a first binding unit 17, a second binding unit 23, a center folding unit transport unit 10, and a bag binding. It is composed of a section conveying means 20, a cutting section conveying means 30, and the like, and each section is connected by a bus.
[0075]
The post-processing device control unit 110 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory) and the like. The CPU of the post-processing device control unit 110 reads out the system program and the condition processing program stored in the ROM, expands the read-out program in the RAM, and centrally controls the operation of each unit of the sheet post-processing device FS according to the expanded program.
[0076]
The post-processing device control unit 110 exchanges control signals by serial communication between the image forming device A and the sheet post-processing device FS by the serial communication unit 111 with the control unit 100 of the image forming device A. I have.
[0077]
FIG. 6 is a flowchart showing the control of the sheet bundle concealment bag binding mode. Hereinafter, steps in the sheet bundle concealment bag binding mode will be described.
[0078]
(1) A desired condition is selected and set by the operation means 9, and the image is read by scanning the document by the image reading device B (step 1).
[0079]
(2) When scanning of all pages of the document is completed (step 2), a sheet bundle concealment bag binding editing process is performed (step 3).
[0080]
(3) Copying by the image forming apparatus A is started (step 4).
(4) When it is confirmed that all pages of the copied paper S have been discharged from the paper discharge unit 7D of the image forming apparatus A (step 5), the paper S introduced into the center folding device FS1 is moved to a predetermined position on the paper mounting table 161. Then, after the perforation forming means 18 is driven to form the perforation a, the sheet is discharged to the center folding means 19 (step 6).
[0081]
(5) When it is confirmed that the final sheet has been discharged to the center folding unit 19 (step 7), the center folding unit 19 performs the center folding process (step 8).
[0082]
(6) The sheet bundle Sa having undergone the center-folding process is introduced into the bag binding processing device FS2, and a binding process of hitting the binding needle SP near the rear end of the sheet bundle Sa is executed (step 9).
[0083]
(7) The sheet bundle Sa having undergone the binding process is introduced into the cutting device FS3, and the vicinity of the rear end of the sheet bundle Sa is cut by the cutting means 32 to form an aligned fore c (step 10).
[0084]
(8) The sheet bundle Sa that has been trimmed is transported by the second transport unit 33 and is stored in the booklet storage unit 34 (step 11).
[0085]
[Control of mixed binding processing mode for paper to be stapled and paper not to be stapled]
FIG. 7A is a perspective view of a sheet bundle Sa that is subjected to “specific page bag binding” processing in which the image content of a specific page is hidden and folded so that the image surface is inward so as not to be seen by others, and bound. FIG. 7B is a cross-sectional view of the sheet bundle Sa.
[0086]
FIG. 8 is a flowchart illustrating control of a mixed binding processing mode (hereinafter, referred to as a bag binding insertion mode) of a sheet to be stapled and a sheet to be stapled.
[0087]
(1) A desired condition is selected and set by the operation means 9, and the image is read by scanning the document by the image reading device B (step 1).
[0088]
(2) When scanning of all pages of the manuscript is completed (step 2), editing processing in the stapling mode is performed (step 3).
[0089]
(3) Copying by the image forming apparatus A is started (step 4).
(4) When it is confirmed that all pages of the copied paper S have been discharged from the paper discharge unit 7D of the image forming apparatus A (step 5) and that the paper S1 to be subjected to the bag binding processing has been discharged (step 6), the folding is performed. The sheet S1 introduced into the processing device FS1 is stopped at a predetermined position on the sheet mounting table 161, the perforation forming means 18 is driven to form a perforation a, and then discharged to the center folding means 19 (step 7). .
[0090]
(5) The center folding unit 19 executes the center folding process (step 8).
(6) The sheet bundle Sa that has been subjected to the half-folding process is introduced into the bag binding apparatus FS2 (step 9).
[0091]
(7) When all the sheets S1 to be bag-bound and the sheet S2 without bag-binding are completely discharged to the bag binding processing device FS2 (step 10), the sheet S1 and the sheet S2 are overlapped and the binding process is performed. It is executed (step 11).
[0092]
(8) The bound sheet bundle Sa is transported by the second transport unit 33 and is stored in the booklet storage unit 34 (step 12).
[0093]
[Page Printing]
9A is a cross-sectional view of the sheet bundle Sa subjected to the bag binding processing with the perforations b cut out, FIG. 9B is a perspective view, and FIG. 9C is a diagram illustrating the sheet bundle Sa subjected to the bag binding processing. It is a perspective view which shows a state which opened.
[0094]
When the page printing is set by the operation unit 9, the image forming apparatus A performs the bag binding in the bag binding processing apparatus FS2 before the perforation forming and the center folding are performed in the center folding processing apparatus FS1. Assuming that S is opened, page printing such as a header or a footer is performed on the sheet S (see FIG. 4).
[0095]
That is, printing is performed by the image forming apparatus A so that pages 1 and p8 are printed with the first surface of the first sheet S1 of the sheet bundle Sa formed by the center folding process and the bag binding process facing outward. . The pages p2 and p7 are printed on the second surface on the back surface side of the sheet S1.
[0096]
Further, pages p3 and p6 are printed on the first surface of the second sheet S2 inside the sheet S1. The pages p4 and p5 are printed on the second surface on the back surface side of the sheet S2.
[0097]
In this way, as shown in the drawing, pages p1 to p8 are printed on a sheet bundle Sa composed of eight pages in which the two sheets S1 and S2 are subjected to the center folding process and the bag binding process.
[0098]
The page printing is performed by the image forming apparatus A in the same manner in the bag binding insertion mode of the sheet to be bound and the sheet without the bag shown in FIG.
[0099]
In the embodiment of the present invention, a post-processing apparatus connected to a copying machine has been described. However, the present invention is also applied to a post-processing apparatus connected to an image forming apparatus such as a printer, a facsimile, a multifunction peripheral, and a light printing machine. It is possible.
[0100]
【The invention's effect】
As is clear from the above description, the following effects can be obtained by the sheet post-processing method, sheet post-processing apparatus, and image forming system of the present invention.
[0101]
(1) “Booklet concealment binding” that prevents others from seeing the image formed on the entire booklet, or folding the image with the image side inside so that the image content of a specific page is concealed and cannot be seen by others A sheet post-processing apparatus is provided that enables setting of a new print mode capable of executing “specific page bag binding” for double-sided printing paper, a sheet folding function, and a binding function.
[0102]
(2) The booklet in which the image surface is concealed by the bag binding can be easily cut off as needed to open the image surface inside.
[0103]
(3) When the entire booklet is folded in half and bound in a bag, by cutting the fore edge at the booklet side end on the binding processing side by cutting means, paper misalignment is eliminated. In particular, the remarkable edge irregularity occurring at the side edge of the booklet when the middle folding process is performed on a large number of sheets is eliminated.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of an image forming system including an image forming apparatus, an image reading apparatus, and a sheet post-processing apparatus including a folding processing apparatus, a binding processing apparatus, and a cutting processing apparatus.
FIG. 2 is a configuration diagram of a sheet post-processing device including a folding device, a binding device, and a cutting device.
FIG. 3 is a perspective view of a perforation forming unit and a sheet S on which perforations are formed.
4A and 4B are a perspective view and a cross-sectional view illustrating a process of a sheet on which booklet concealment binding processing is performed.
FIG. 5 is a block diagram of an image forming system.
FIG. 6 is a flowchart illustrating control of a sheet bundle concealment bag binding mode.
FIG. 7 is a perspective view and a cross-sectional view of a sheet bundle subjected to a specific page bag binding process in which the image content of a specific page is concealed and folded so that the image surface is inside so as not to be seen by others;
FIG. 8 is a flowchart illustrating control in a staple binding insertion mode.
FIG. 9 is a perspective view illustrating a state in which the sheet bundle that has been subjected to the bag binding processing is opened with the both sides of the sewing machine opened.
[Explanation of symbols]
9 Operating means
10 Half-folding section transport means
16 Paper storage means
17 First binding means
18 Perforation forming means
19 Means of folding
20 bag binding section conveying means
21 Conveyor belt
22 Butt member
23 Second binding means
30 Cutting section conveying means
31 1st conveyance means
32 Cutting means
33 2nd conveyance means
332 conveyor belt
34 Booklet storage means
A Image forming device
FS paper post-processing device
FS1 center folding device
FS2 Stapler
FS3 Cutting equipment
S, S1, S2 paper
Sa Paper Bundle
SP binding needle
a perforation
b crease
c small
p1 to p8 page printing

Claims (9)

After the sheet on which the image has been formed is stacked on a sheet mounting table and aligned, and a folding device is used to make a fold at the center of the sheet in the conveyance direction and middle-folding processing is performed, near the sheet edge opposite to the fold A sheet post-processing method, wherein a binding staple is hit by a bag binding processing device, and the sheet is subjected to a bag binding process. 2. The sheet post-processing method according to claim 1, wherein a perforation is formed at a center in a sheet conveying direction before the center folding processing. 2. The sheet binding side edge of a sheet bundle that has been subjected to center folding processing by the folding processing device and subjected to bag binding processing by the bag binding processing device is cut and aligned by a cutting processing device. Paper post-processing method. Conveying means for conveying the paper discharged from the image forming apparatus onto a paper mounting table,
A folding device that performs a center folding process with a fold at the center in the transport direction of the sheet,
A bag binding processing device that hits a binding staple near the edge of the sheet opposite to the fold to perform the bag binding process on the sheet;
A sheet post-processing device comprising: 5. The sheet post-processing apparatus according to claim 4, further comprising a perforation forming unit that forms a perforation at a center in a sheet conveying direction before the center folding process. The paper post-processing apparatus according to claim 4, wherein the bag binding processing apparatus performs the bag binding processing on the sheet that has been subjected to the center folding processing and the sheet that has not been subjected to the center folding processing. 6. The sheet post-processing according to claim 4, further comprising a trimming device configured to align a bag binding side of the sheet bundle that is subjected to the center folding process by the folding device and subjected to the bag binding process by the bag binding device. 7. apparatus. An image forming apparatus including an image writing unit, an image forming unit, a sheet conveying unit, and a control unit;
A sheet post-processing apparatus comprising: the folding processing apparatus according to any one of claims 4 to 7; a bag binding processing apparatus; and a cutting processing apparatus for aligning the bag binding side of the sheet bundle subjected to the bag binding processing. An image forming system comprising: 9. The image forming system according to claim 8, wherein the image forming apparatus performs page printing on a sheet on the assumption that a sheet stapled in the sheet post-processing apparatus is opened. 10.

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