JP2021080109A - Sheet processing device, and image formation system - Google Patents

Abstract

To make it possible to enhance convenience for a user when pressing a fold formed on a sheet.SOLUTION: A sheet processing device is equipped with: a transport part for transporting a sheet on which a fold is formed; a pressing part for pressing the fold of the sheet; an end part detection part which detects a transport direction end part of the sheet at a transport direction upstream side of the sheet with respect to the pressing part; and a setting part for setting a position of the fold. In the sheet processing device, the transport part transports the sheet with the fold formed thereon based on a set position of the fold to a position where the fold faces the pressing part, after detection of the transport direction end part, and the pressing part presses the fold of the transported sheet.SELECTED DRAWING: Figure 28

Description

The present invention relates to a sheet processing apparatus and an image forming system.

In recent years, in order to fold an image forming apparatus used for outputting digitized information and an image-formed sheet on which an image is formed in the image forming apparatus, it is used by being connected to or built in the image forming apparatus. The folding processing device to be used has become an indispensable device.

When the sheet is folded in such a folding processing device, the crease is weak and the crease becomes incomplete as it is, and the fold height becomes high. Therefore, among such folding processing devices, a folding processing device equipped with an additional folding mechanism that strengthens the folds and reduces the folding height by pressing the folds formed by the folding process has been proposed and is already known. (See, for example, Patent Documents 1 and 2).

However, the position of the crease formed on the sheet is not always the same position every time, and changes depending on the folding method and the size of the paper. Therefore, in the conventional folding processing apparatus, the user must set the pressing position of the crease each time in order to accurately press the crease formed on the sheet. As described above, the conventional folding processing device has a problem that it is inconvenient for the user.

The present invention has been made to solve such a problem, and an object of the present invention is to improve convenience for a user when pressing a crease formed on a sheet.

In order to solve the above problems, one aspect of the present invention is a transporting portion for transporting a sheet in which a crease is formed, a pressing portion for pressing the crease of the sheet, and an upstream of the pressing portion in the transport direction of the sheet. In a sheet processing device including an end detection unit that detects an end portion of the sheet in a transport direction on the side and a setting unit that sets the position of the crease, the transport unit is located at the set crease position. Based on this, the sheet in which the crease is formed is conveyed to a position where the crease faces the pressing portion after the end portion in the conveying direction is detected, and the pressing portion presses the crease of the conveyed sheet. It is characterized by.

According to the present invention, it is possible to improve the convenience for the user when pressing the crease formed on the sheet.

It is a figure which shows the whole structure of the image forming apparatus which concerns on embodiment of this invention simplified. It is a figure which shows the whole structure of the image forming apparatus which concerns on embodiment of this invention simplified. It is a block diagram which shows typically the hardware composition of the image forming apparatus which concerns on embodiment of this invention. It is a block diagram which shows typically the functional structure of the image forming apparatus which concerns on embodiment of this invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. It is a figure which shows an example of the shape of the paper which was Z-folded by the folding processing unit which concerns on embodiment of this invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. It is a figure which shows an example of the shape of the paper which was folded in three by the folding processing unit which concerns on embodiment of this invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing a folding processing unit during a folding processing operation from the main scanning direction in the image forming apparatus according to the embodiment of the present invention. It is a figure which shows an example of the shape of the paper which was folded in three outside by the folding processing unit which concerns on embodiment of this invention. It is a perspective view which shows the fold-folding roller which concerns on embodiment of this invention from diagonally above and sideways in the main scanning direction. It is a front view which shows the extra folding roller which concerns on embodiment of this invention from the sub-scanning direction. It is a side view which shows the fold-folding roller which concerns on embodiment of this invention from the main scanning direction. It is a developed view of the additional folding roller which concerns on embodiment of this invention. It is a perspective view which shows the additional folding roller which concerns on embodiment of this invention from the diagonally upper side in the main scanning direction. It is a front view which shows the fold-folding roller which concerns on embodiment of this invention from the sub-scanning direction. It is a side view which shows the fold-folding roller which concerns on embodiment of this invention from the main scanning direction. It is a developed view of the additional folding roller which concerns on embodiment of this invention. It is sectional drawing which shows the additional folding roller and the paper support plate at the time of performing the additional folding processing by the folding processing unit which concerns on embodiment of this invention from the main scanning direction. It is sectional drawing which shows the additional folding roller and the paper support plate at the time of performing the additional folding processing by the folding processing unit which concerns on embodiment of this invention from the main scanning direction. It is a figure which shows the time-dependent change of the paper transport speed and the rotation speed of the fold-fold roller when the fold processing unit which concerns on embodiment of this invention performs fold-fold. It is a figure which shows the operation example when the folding processing unit which concerns on embodiment of this invention adjusts a pressing position at the time of additional folding. It is a figure which shows the operation example when the folding processing unit which concerns on embodiment of this invention adjusts a pressing position at the time of additional folding. It is a figure which shows the operation example when the folding processing unit which concerns on embodiment of this invention adjusts a pressing position at the time of additional folding. It is a figure which shows an example of the shape of the paper which the folding processing unit which concerns on embodiment of this invention is a target of additional folding. It is a figure which shows the operation example when the folding processing unit which concerns on embodiment of this invention adjusts a pressing position at the time of additional folding. It is a figure which shows an example of the shape of the paper which the folding processing unit which concerns on embodiment of this invention is a target of additional folding. It is a figure which shows the operation example in which the folding processing unit which concerns on embodiment of this invention applies a sufficient pressing force to a crease, and also improves productivity. It is a figure which shows an example of the paper which the folding processing unit which concerns on embodiment of this invention is a target of additional folding. It is a figure which shows the operation example in which the folding processing unit which concerns on embodiment of this invention applies a sufficient pressing force to a crease, and also improves productivity.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, as an example of the sheet processing device, a folding processing unit for folding an image-formed sheet which is connected to or built in the image forming unit and has an image formed by the image forming unit will be described. The folding processing unit according to the present embodiment is provided with an additional folding mechanism that strengthens the folds and reduces the folding height by pressing the folds formed by the folding processing.

Such a folding processing unit does not always form a crease at the same position every time, but changes the position at which the crease is formed depending on the folding method and the size of the paper. Therefore, the folding processing unit cannot accurately press the creases formed on the paper even if the crease positions are different for each paper during the additional folding.

Therefore, one of the gist of the folding processing unit according to the present embodiment is to adjust the pressing position according to the position of the crease formed on the sheet at the time of additional folding. Therefore, the folding processing unit according to the present embodiment can accurately press the crease.

First, the overall configuration of the image forming apparatus 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a simplified view showing the overall configuration of the image forming apparatus 1 according to the present embodiment. As shown in FIG. 1, the image forming apparatus 1 according to the present embodiment is composed of an image forming unit 2, a folding processing unit 3, a post processing unit 4, and a scanner unit 5.

The image forming unit 2 generates CMYK (Cyan Magenta Yellow Key Plate) drawing information based on the input image data, and outputs an image forming output to the fed paper based on the generated drawing information. Execute. The folding processing unit 3 executes the folding processing and the additional folding processing on the image-formed paper conveyed from the image forming unit 2. That is, in the present embodiment, the folding processing unit 3 functions as a sheet processing device and a crease forming portion. The post-processing unit 4 executes post-processing such as bookbinding, staples, and punching on the folded paper conveyed from the folding processing unit 3.

The scanner unit 5 reads a document by a linear image sensor in which a plurality of photodiodes are arranged in a row and light receiving elements such as a CCD (Charge Coupled Device) and a CMOS (Complementary Metal Oxide Semiconductor) image sensor are arranged in parallel therewith. By doing so, the manuscript is digitized. In addition to this, the image forming apparatus 1 according to the present embodiment is provided with an imaging function, an image forming function, a communication function, and the like, so that it can be used as a printer, a facsimile, a scanner, a copying machine, and the like. ).

In addition, in FIG. 1, the configuration in which the image forming apparatus 1 includes the folding processing unit 3 in the body of the image forming unit 2 is shown, but as shown in FIG. 2, the image forming apparatus 1 is the folding processing unit 3. May be configured to be provided independently. FIG. 2 is a diagram showing a simplified overall configuration of the image forming apparatus 1 according to the present embodiment.

Next, the hardware configuration of the image forming apparatus 1 according to the present embodiment will be described with reference to FIG. FIG. 3 is a block diagram schematically showing a hardware configuration of the image forming apparatus 1 according to the present embodiment.

As shown in FIG. 3, the image forming apparatus 1 according to the present embodiment includes the same configuration as a general server, a PC (Personal Computer), or the like. That is, in the image forming apparatus 1 according to the present embodiment, the CPU (Central Processing Unit) 10, the RAM (Random Access Memory) 20, the ROM (Read Only Memory) 30, the HDD (Hard Disk Drive) 40, and the I / F 50 are bused. It is connected via 90. Further, a display unit 60, an operation unit 70, and a dedicated device 80 are connected to the I / F 50.

The CPU 10 is a calculation means and controls the operation of the entire image forming apparatus 1. The RAM 20 is a volatile storage medium capable of reading and writing information at high speed, and is used as a work area when the CPU 10 processes information. The ROM 30 is a read-only non-volatile storage medium, and stores programs such as firmware. The HDD 40 is a non-volatile storage medium capable of reading and writing information, and stores an OS (Operating System), various control programs, application programs, and the like.

The I / F 50 connects and controls the bus 90 with various hardware, networks, and the like. The display unit 60 is a visual user interface for the user to confirm the state of the image forming apparatus 1, and is realized by a display device such as an LCD (Liquid Crystal Display). The operation unit 70 is a user interface such as a keyboard and a mouse for a user to input information to the image forming apparatus 1.

The dedicated device 80 is hardware for realizing dedicated functions in the image forming unit 2, the folding processing unit 3, the post-processing unit 4, and the scanner unit 5, and the image forming unit 2 outputs an image on paper. It is a plotter device that executes.

Further, the folding processing unit 3 is a conveying mechanism for conveying the paper, a folding processing mechanism for folding the conveyed paper, and an additional folding processing mechanism for increasing and folding the creases formed in the paper. The configuration of the additional folding processing mechanism included in the folding processing unit 3 is one of the gist of the present embodiment.

Further, the post-processing unit 4 is a post-processing mechanism that performs post-processing on the paper conveyed from the image forming unit 2 or the folding processing unit 3. Further, the scanner unit 5 is a document reading mechanism for optically reading a document and an automatic transport mechanism for automatically transporting paper.

In such a hardware configuration, a program stored in a storage medium such as a ROM 30 or HDD 40 or an optical disk (not shown) is read into the RAM 20, and the CPU 10 performs an operation according to the program loaded in the RAM 20 to cause a software control unit. Is configured. The combination of the software control unit and the hardware configured in this way constitutes a functional block that realizes the function of the image forming apparatus 1 according to the present embodiment.

Next, the functional configuration of the image forming apparatus 1 according to the present embodiment will be described with reference to FIG. FIG. 4 is a block diagram schematically showing the functional configuration of the image forming apparatus 1 according to the present embodiment. In FIG. 4, the electrical connection is indicated by a solid arrow, and the flow of the paper or document bundle is indicated by a broken line arrow.

As shown in FIG. 4, the image forming apparatus 1 according to the present embodiment includes a controller 100, a print engine 200, a paper feed table 201, a print output tray 202, a folding processing engine 300, a post-processing engine 400, and post-processing discharge. It has a paper tray 401, a scanner engine 500, a document stand 501, an ADF (Auto Document Feeder) 502, a document output tray 503, a display panel 600, and a network I / F 700. Further, the controller 100 includes a main control unit 101, an engine control unit 102, an input / output control unit 103, an image processing unit 104, and an operation display control unit 105.

The print engine 200 is an image forming unit provided in the image forming unit 2, and draws an image by executing an image forming output on the paper conveyed from the paper feed table 201. As a specific embodiment of the print engine 200, it is possible to use an image forming mechanism by an inkjet method, an image forming mechanism by an electrophotographic method, or the like.

The image-formed paper on which the image is drawn by the print engine 200 is conveyed to the folding processing unit 3 or discharged to the print output tray 202. The print engine 200 is realized by the dedicated device 80 shown in FIG. The paper feed table 201 feeds paper to the print engine 200, which is an image forming unit.

The folding processing engine 300 is provided in the folding processing unit 3 and performs a folding process and an additional folding process on the image-formed paper conveyed from the image forming unit 2. The folded paper that has been folded by the folding engine 300 is conveyed to the post-processing unit 4. The folding processing engine 300 is realized by the dedicated device 80 shown in FIG.

The post-processing engine 400 is provided in the post-processing unit 4, and performs post-processing such as stapling, punching, and bookbinding processing on the paper conveyed from the folding processing engine 300. The paper that has been post-processed by the post-processing engine 400 is discharged to the post-processing output tray 401. The post-processing engine 400 is realized by the dedicated device 80 shown in FIG.

The scanner engine 500 is a document reading unit provided in the scanner unit 5 and including a photoelectric conversion element that converts optical information into an electric signal. Image information is generated by optically scanning and scanning the set document.

The originals automatically conveyed from the platen 501 by the ADF 502 and read by the scanner engine 500 are ejected to the original paper ejection tray 503. The scanner engine 500 is realized by the dedicated device 80 shown in FIG. The ADF502 is provided in the scanner unit 5 and automatically conveys the document set on the platen 501 to the scanner engine 500. This ADF502 is realized by the dedicated device 80 shown in FIG.

The display panel 600 is an output interface that visually displays the state of the image forming apparatus 1, and is an input when the user directly operates the image forming apparatus 1 or inputs information to the image forming apparatus 1 as a touch panel. It is also an interface. That is, the display panel 600 includes a function of displaying an image for receiving an operation by the user. The display panel 600 is realized by the display unit 60 and the operation unit 70 shown in FIG.

The network I / F700 is an interface for the image forming apparatus 1 to communicate with other devices such as an administrator terminal and a PC (Personal Computer) via a network, and is an interface for Ethernet (registered trademark) and USB (Universal Serial Bus). ) Interfaces, interfaces such as Bluetooth®, Wi-Fi (Willess Fieldity)®, Felica®, etc. are used. As described above, the image forming apparatus 1 according to the present embodiment receives image data of a print request and various control commands such as a print request from a terminal connected via the network I / F 900. The network I / F 700 is realized by the I / F 50 shown in FIG.

The controller 100 is composed of a combination of software and hardware. Specifically, a control program such as firmware stored in a non-volatile storage medium such as ROM 30 or HDD 40 is loaded into RAM 20, and a software control unit and an integrated circuit are configured by the CPU 10 performing calculations according to those programs. The controller 100 is configured by such hardware. The controller 100 functions as a control unit that controls the entire image forming apparatus 1.

The main control unit 101 plays a role of controlling each unit included in the controller 100, and gives a command to each unit of the controller 100. Further, the main control unit 101 controls the input / output control unit 103 and accesses other devices via the network I / F 700 and the network.

The engine control unit 102 controls or drives a drive unit such as a print engine 200, a folding processing engine 300, a post-processing engine 400, and a scanner engine 500. The input / output control unit 103 inputs signals and commands input via the network I / F 190 and the network to the main control unit 101.

The image processing unit 104 outputs drawing information based on image information described by PDL (Page Description Language) or the like, for example, document data or image data included in the input print job, under the control of the main control unit 101. Generate as information. This drawing information is information such as CMYK bitmap data, and is information for drawing an image to be formed by the print engine 200, which is an image forming unit, in an image forming operation.

In addition, the image processing unit 104 processes the imaging data input from the scanner engine 500 to generate image data. This image data is information stored in the image forming apparatus 1 as a result of the scanner operation or transmitted to other devices via the network I / F700 and the network. The image forming apparatus 1 according to the present embodiment can directly input drawing information instead of the image information and execute the image forming output based on the directly input drawing information.

The operation display control unit 105 displays information on the display panel 600 or notifies the main control unit 101 of the information input via the display panel 600.

Next, an operation example when the folding processing unit 3 according to the present embodiment performs Z folding will be described with reference to FIGS. 5 to 7. 5 to 7 are cross-sectional views showing the folding processing unit 3 during the folding processing operation in the image forming apparatus 1 according to the present embodiment from the main scanning direction.

When the folding processing unit 3 according to the present embodiment performs Z-folding, first, as shown in FIG. 5A, the folding processing unit 3 receives the paper 6 from the image forming unit 2 and then becomes the first. One paper detection sensor 391 detects the tip of the paper 6 in the transport direction and starts the rotation of each roller. Then, the folding processing unit 3 receives the paper 6 to which the paper 6 has been conveyed from the image forming unit 2 by the inlet transfer roller pair 310, and conveys the paper 6 toward the resist roller pair 320.

The folding processing unit 3 resist-corrects the paper 6 conveyed by the inlet transfer roller pair 310 with the resist roller pair 320, and then uses the first forward / reverse rotation roller pair 330 as shown in FIG. 5 (b). Further transport to the downstream side in the transport direction.

After that, when the folding processing unit 3 detects the tip of the paper 6 in the transport direction by the second paper detection sensor 392 and then transports the paper 6 by a predetermined distance S1, as shown in FIG. By reversing the rotation direction of one forward / reverse rotating roller pair 330, the first folding position of the paper 6 is bent toward the first folding processing roller pair 340 side, and the formed bending position is not displaced. Then, the paper 6 is further conveyed to guide the bending to the nip portion of the first folding roller pair 340. At this time, the folding processing unit 3 detects that the first forward / reverse rotating roller pair 330 has been conveyed by the distance S1 by the pulse count, the rotation speed, and the driving time.

Then, as shown in FIG. 6A, the folding processing unit 3 sandwiches the deflection formed in the paper 6 at the nip portion of the first folding processing roller pair 340 from both sides to the first folding position. Along with making creases, as shown in FIGS. 6 (b) and 6 (c), the paper 6 is conveyed toward the second forward / reverse rotating roller pair 350, and is further conveyed downstream in the conveying direction.

After that, when the folding processing unit 3 detects the tip of the paper 6 in the transport direction by the third paper detection sensor 393 and then transports the paper 6 by a predetermined distance S2, as shown in FIG. 7A, the second By reversing the rotation direction of the forward / reverse rotation roller pair 350, the second folding position of the paper 6 is bent toward the second folding processing roller pair 360 side, and the formed bending position is not displaced. By further transporting the paper 6, the bending is guided to the nip portion of the second folding roller pair 360. At this time, the folding processing unit 3 detects that the second forward / reverse rotating roller pair 350 has been conveyed by the distance S2 based on the pulse count, the rotation speed, and the driving time.

Then, as shown in FIG. 7B, the folding processing unit 3 sandwiches the deflection formed in the paper 6 at the nip portion of the second folding processing roller pair 360 from both sides to the second folding position. Along with making a crease, the paper 6 is increased and conveyed toward the gap between the folding roller 370 and the paper support plate 380.

Then, when the folding processing unit 3 detects the end portion in the paper transport direction by the fourth paper detection sensor 394 and then transports the paper by a predetermined distance S3, the conveyed paper 6 is as shown in FIG. 7 (c). The creases formed in the above are pressed against the paper support plate 380 by the additional folding roller 370 to perform additional folding, and then conveyed to the post-processing unit 4. That is, in the present embodiment, the fourth paper detection sensor 394 functions as an edge detection unit, and the additional folding roller 370 functions as a pressing unit. At this time, the folding processing unit 3 detects that the second folding processing roller pair 360 has conveyed the distance S3 by the pulse count, the rotation speed, and the driving time. That is, in the present embodiment, the second folding processing roller pair 360 functions as a transport unit.

As a result of the operation as shown in FIGS. 5 to 7, the paper 6 is in a Z-folded state as shown in FIG.

In FIGS. 5 to 7, an example in which the folding processing unit 3 Z-folds the paper 6 has been described. In addition, the folding processing unit 3 can fold the paper 6 in three by the operations shown in FIGS. 9 to 11. As a result, the paper 6 is in a state of being folded in three as shown in FIG.

In addition, the folding processing unit 3 can fold the paper 6 in three by the operations shown in FIGS. 13 to 15. As a result, the paper 6 is in a state of being folded in three as shown in FIG.

These operations are the same as the operations described with reference to FIGS. 5 to 7, but the distance S1, the distance S2, and the distance S3 are different depending on the folding method and the size of the paper 6. Therefore, the folding processing unit 3 reverses the rotation direction of the first forward / reverse rotation roller pair 330 and the rotation direction of the second forward / reverse rotation roller pair 350 according to the folding method and the size of the paper 6. The timing of the additional folding and the timing of the additional folding by the additional folding roller 370 are changed.

The S1, S2, and S3 are predetermined according to the folding method and the size of the paper 6, and are stored in a non-volatile storage medium such as a ROM 30 or an HDD 40. However, S1, S2, and S3 may be set or changed by user designation or the like. That is, in the folding processing unit 3 according to the present embodiment, a position for forming a crease may be set or changed according to a user's designation or the like, in addition to the predetermined folding method. At this time, the main control unit 101 sets or changes the folding position for forming the crease. That is, in the present embodiment, the main control unit 101 functions as a setting unit.

Next, a structural example of the additional folding roller 370 according to the present embodiment will be described with reference to FIGS. 17 to 20 and 21 to 24.

First, the structure of the first example of the fold-back roller 370 according to the present embodiment will be described with reference to FIGS. 17 to 20. FIG. 17 is a perspective view showing the additional folding roller 370 according to the present embodiment from diagonally above and sideways in the main scanning direction. FIG. 18 is a front view showing the additional folding roller 370 according to the present embodiment from the sub-scanning direction. FIG. 19 is a side view showing the additional folding roller 370 according to the present embodiment from the main scanning direction. FIG. 20 is a developed view of the additional folding roller 370 according to the present embodiment.

As a first structural example, the additional folding roller 370 according to the present embodiment has an additional folding roller rotation shaft 371 that rotates about an axis penetrating in the main scanning direction as a rotation axis, as shown in FIGS. 17 to 20. A convex pressing force transmitting portion 372 is spirally arranged on the circumferential surface of the pressing force transmitting roller 373 toward the main scanning direction with a constant angle difference θ with the folding roller rotating shaft 371. The additional folding roller 370 according to the present embodiment is configured in this way so that only a part of the pressing force transmitting portion 372 comes into contact with the crease formed on the paper 6.

Therefore, the additional folding roller 370 according to the present embodiment can sequentially press the creases formed on the paper 6 in one direction in the main scanning direction by rotating the additional folding roller rotation shaft 371 as a rotation axis. it can.

Therefore, the folding processing unit 3 according to the present embodiment can apply a concentrated pressing force over the entire crease in a short period of time. Therefore, the folding processing unit 3 according to the present embodiment can apply a sufficient pressing force to the crease without lowering the productivity while reducing the load on the additional folding roller rotating shaft 371.

Next, the structure of the second example of the additional folding roller 370 according to the present embodiment will be described with reference to FIGS. 21 to 24. FIG. 21 is a perspective view showing the additional folding roller 370 according to the present embodiment from diagonally above and sideways in the main scanning direction. FIG. 22 is a front view showing the additional folding roller 370 according to the present embodiment from the sub-scanning direction. FIG. 23 is a side view showing the additional folding roller 370 according to the present embodiment from the main scanning direction. FIG. 24 is a developed view of the additional folding roller 370 according to the present embodiment.

As a second structural example of the additional folding roller 370 according to the present embodiment, as shown in FIGS. 21 to 24, the convex pressing force transmitting portion 372 is additionally folded on the peripheral surface of the pressing force transmitting roller 373. It is configured to be spirally arranged with a constant angle difference θ with the roller rotation shaft 371 and arranged in a V shape toward the main scanning direction so as to be symmetrical with respect to the center in the main scanning direction of the fold-back roller 370. To. The additional folding roller 370 according to the present embodiment is configured in this way so that a part of the pressing force transmitting portion 372 comes into contact with the creases formed on the paper 6 at two places at the same time.

Therefore, the additional folding roller 370 according to the present embodiment can sequentially press the creases formed on the paper 6 in both directions in the main scanning direction by rotating the additional folding roller rotation shaft 371 as a rotation axis. ..

Therefore, the folding processing unit 3 according to the present embodiment has a lower pressing force as compared with the structures shown in FIGS. 17 to 20, but a concentrated pressing force is applied over the entire crease in a shorter period of time. Is possible. Therefore, the folding processing unit 3 according to the present embodiment can apply a sufficient pressing force to the crease while reducing the load on the additional folding roller rotating shaft 371 while improving the productivity.

Next, details of an operation example when the folding processing unit 3 according to the present embodiment performs additional folding will be described with reference to FIGS. 25 to 27. 25 and 26 are cross-sectional views showing the additional folding roller 370 and the paper support plate 380 when the folding processing unit 3 according to the present embodiment is executing the additional folding process from the main scanning direction. FIG. 27 is a diagram showing changes over time between the conveying speed of the paper 6 and the rotation speed of the additional folding roller 370 when the folding processing unit 3 according to the present embodiment performs additional folding. In addition, in FIGS. 25 to 27, an example of performing additional folding on the Z-folded paper 6 having the first crease 6a and the second crease 6b will be described.

When the folding processing unit 3 according to the present embodiment starts conveying the paper 6 as shown in FIGS. 25 (a) and 27, the folding processing unit 3 stops the paper 6 as shown in FIGS. 25 (b) and 27. The rotation of the additional folding roller 370 is started without waiting. As described above, the folding processing unit 3 according to the present embodiment starts the rotation of the additional folding roller 370 without waiting for the paper 6 to stop because the additional folding roller 370 comes into contact with the paper 6 after the rotation starts. This is to shorten the time lag until. As a result, the folding processing unit 3 according to the present embodiment can improve the productivity.

Then, as shown in FIGS. 25 (c) and 27, the folding processing unit 3 starts contacting the first crease 6a formed on the paper 6 with the folding roller 370 against the first crease 6a. Start pressing. As shown in FIGS. 25 (d) and 27, the folding processing unit 3 completely conveys the paper 6 when the paper 6 is conveyed until the first crease 6a is located directly above the additional folding roller rotation shaft 371. By continuing to rotate the additional folding roller 370 after stopping the paper 6, the pressing on the first crease 6a formed on the paper 6 is continued.

After that, as shown in FIGS. 25 (e) and 27, the folding processing unit 3 starts conveying the paper 6 without waiting for the additional folding roller 370 to stop. As described above, the folding processing unit 3 according to the present embodiment starts the transfer of the paper 6 without waiting for the additional folding roller 370 to stop, after the additional folding roller 370 separates the paper 6 and then completely stops. This is to shorten the time lag until. As a result, the folding processing unit 3 according to the present embodiment can improve the productivity.

Then, as shown in FIGS. 25 (f) and 27, the folding processing unit 3 conveys the paper 6 separated from the additional folding roller 370, and as shown in FIGS. 26 (a) and 27, the additional folding roller The rotation of the 370 is stopped, and as shown in FIGS. 26 (b) and 27, the rotation of the additional folding roller 370 is started without waiting for the paper 6 to stop. As described above, the folding processing unit 3 according to the present embodiment starts the rotation of the additional folding roller 370 without waiting for the paper 6 to stop because the additional folding roller 370 comes into contact with the paper 6 after the rotation starts. This is to shorten the time lag until. As a result, the folding processing unit 3 according to the present embodiment can improve the productivity.

Then, as shown in FIGS. 26 (c) and 27, the folding processing unit 3 starts contacting the second fold 6b formed on the paper 6 with the additional folding roller 370, whereby the second fold 6b is formed. Start pressing against. As shown in FIGS. 26 (d) and 27, the folding processing unit 3 completely conveys the paper 6 when the paper 6 is conveyed until the second crease 6b is located directly above the additional folding roller rotation shaft 371. By continuing to rotate the additional folding roller 370 after stopping the paper 6, the pressing against the second crease 6b formed on the paper 6 is continued.

After that, as shown in FIGS. 26 (e) and 27, the folding processing unit 3 starts conveying the paper 6 without waiting for the additional folding roller 370 to stop. As described above, the folding processing unit 3 according to the present embodiment starts the transfer of the paper 6 without waiting for the additional folding roller 370 to stop, after the additional folding roller 370 separates the paper 6 and then completely stops. This is to shorten the time lag until. As a result, the folding processing unit 3 according to the present embodiment can improve the productivity.

Then, as shown in FIGS. 26 (f) and 27, the folding processing unit 3 finishes the additional folding by conveying the paper 6 separated from the additional folding roller 370.

The folding processing unit 3 configured in this way does not always form creases at the same position each time, but changes the position at which creases are formed depending on the folding method and the size of the paper 6. Therefore, the folding processing unit cannot accurately press the creases formed on the paper 6 even if the crease positions are different for each paper during the additional folding.

Therefore, one of the gist of the folding processing unit 3 according to the present embodiment is to adjust the pressing position according to the position of the crease formed on the paper 6 at the time of additional folding. Therefore, the folding processing unit 3 according to the present embodiment can accurately press the crease.

Next, refer to FIGS. 28 (a) and 28 (b) and 29 (a) and (b) for an operation example when the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding. explain.

First, the operation of the first example when the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding will be described with reference to FIGS. 28A and 28B. 28 (a) and 28 (b) are diagrams showing an operation example when the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding.

In addition, in FIGS. 28A and 28B, the paper is folded in three outside, and the first crease 6a is at the front end of the paper 6 in the transport direction and the second crease is at the rear end in the transport direction. An example in which 6b is formed is shown. Further, FIGS. 28A and 28B show a case where the distance between the first fold 6a and the second crease 6b is different.

When the folding processing unit 3 according to the present embodiment first detects the tip of the paper 6 in the transport direction by the fourth paper detection sensor 394 as shown in the left figure of FIG. 28A, when performing additional folding, The paper 6 is conveyed by a predetermined distance S4 and stopped.

The predetermined distance S4 is a distance between the fourth paper detection sensor 394 and the additional folding roller 370, and is stored in advance in a non-volatile storage medium such as ROM 30 or HDD 40. Therefore, the paper 6 transported by the predetermined distance S4 is located at the tip in the transport direction, that is, the first crease 6a is located directly above the additional folding roller 370. Then, the folding processing unit 3 presses the first crease 6a at this position.

After pressing the first crease 6a, the folding processing unit 3 starts conveying the paper 6, and as shown in the right figure of FIG. 28A, the fourth paper detection sensor 394 rearward the paper 6 in the conveying direction. When the edge is detected, the paper 6 is further conveyed by a predetermined distance S4. Therefore, the paper 6 transported by the predetermined distance S4 is located at the rear end in the transport direction, that is, the second crease 6b is located directly above the additional folding roller 370. Then, the folding processing unit 3 presses the second crease 6b at this position.

At this time, since the folding processing unit 3 changes the position of forming the crease according to the folding method, the size of the paper 6, and the user's specification, it is necessary to change the pressing position according to the position of the crease at the time of additional folding.

Therefore, as shown in FIG. 28B, the folding processing unit 3 according to the present embodiment presses the first crease 6a, and then the position of the fold formed on the paper 6 changes by the amount of the paper 6 It is designed to change the transport distance of. In the example shown in FIG. 28B, since the distance between the first crease 6a and the second crease 6b changes from L to L', the fold processing unit 3 presses the first crease 6a. After that, the transport distance of the paper 6 is changed by L'-L.

As described above, the folding processing unit 3 according to the present embodiment adjusts the pressing position according to the position of the crease formed on the paper 6 by adjusting the conveying distance of the paper 6 at the time of additional folding. It has become. Therefore, the folding processing unit 3 according to the present embodiment can accurately press the crease even when the crease position is different for each paper.

Next, the operation of the second example when the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding will be described with reference to FIGS. 29 (a) and 29 (b). 29 (a) and 29 (b) are diagrams showing an operation example when the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding.

Note that, in FIGS. 29 (a) and 29 (b), similarly to FIGS. 28 (a) and 28 (b), the paper is folded in three outside and is first at the tip of the paper 6 in the transport direction. The crease 6a shows an example in which the second crease 6b is formed at the rear end in the transport direction. Further, similarly to FIGS. 28 (a) and 28 (b), FIGS. 29 (a) and 29 (b) show a case where the distance between the first crease 6a and the second crease 6b is different. ..

When the folding processing unit 3 according to the present embodiment performs additional folding, as shown in FIG. 29 (a), the first crease 6a and the second crease 6b are similar to those in FIG. 28 (a). Press.

At this time, since the folding processing unit 3 changes the position of forming the crease depending on the folding method and the size of the paper 6, it is necessary to change the pressing position according to the position of the crease at the time of additional folding.

Therefore, as shown in FIG. 29B, the folding processing unit 3 according to the present embodiment has the first crease 6a and the second crease 6a before the position of the crease changes after pressing the first crease 6a. The paper 6 is conveyed by a distance from the crease 6b, and the additional folding roller 370 is moved by the amount of change in the position of the fold formed on the paper 6. In the example shown in FIG. 29B, since the distance between the first crease 6a and the second crease 6b changes from L to L', the fold processing unit 3 presses the first crease 6a. After that, the paper 6 is conveyed by L, and the folding roller 370 is moved by L'-L.

As described above, the folding processing unit 3 according to the present embodiment adjusts the pressing position according to the position of the crease formed on the paper 6 by moving the additional folding roller 370 at the time of additional folding. ing. Therefore, the folding processing unit 3 according to the present embodiment can accurately press the crease even when the crease position is different for each paper.

In the folding processing unit 3 according to the present embodiment, when the additional folding roller 370 is moved as shown in FIG. 29B, the distance between the additional folding roller 370 and the drive unit for driving the additional folding roller 370 changes. Drive transmission parts such as timing belts are regulated by tensioners and the like. That is, in the present embodiment, the drive unit that drives the additional folding roller 370 functions as a moving unit.

Next, regarding an operation example in which the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding when the crease is not located at the tip of the paper 6 in the transport direction, FIGS. This will be described with reference to b). 30 (a) and 30 (b) are diagrams showing an operation example when the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding.

When the crease is not located at the tip of the paper 6 in the transport direction, the fold processing unit 3 according to the present embodiment can detect the first crease 6a formed on the paper 6 by the fourth paper detection sensor 394. Can not.

Therefore, in the folding processing unit 3 according to the present embodiment, when the crease is not located at the tip of the paper 6 in the transport direction, when adjusting the pressing position at the time of additional folding, as shown in FIG. 30A, the fourth sheet detection sensor 394 when detecting the conveying direction leading edge of the sheet 6, the distance L ₁ between the conveying direction leading end and a second fold line 6b of the sheet 6, the first fold line 6a and a second fold line 6b distance S4 ₊ L 1 -L ₂ in consideration to the difference _L 1 -L ₂ and S4 in the distance _{L 2} that conveys the sheet 6, thereby adjusting the pressing position.

Alternatively, in the folding processing unit 3 according to the present embodiment, when the crease is not located at the tip of the paper 6 in the transport direction, when adjusting the pressing position at the time of additional folding, as shown in FIG. 30B, Upon detecting the conveying direction leading edge of the sheet 6 by the fourth sheet detection sensor 394, conveys the sheet 6 by a distance S4, the additionally folding roller 370 that is moved by L ₁ -L _2, so as to adjust the pressing position It has become.

The L _{1 to} L ₂ are distances calculated based on the folding information regarding the folding method and the paper information regarding the size of the paper 6 in the transport direction. Therefore, _{the paper 6 transported with the transfer distance changed by L 1 to} L ₂ has the first crease 6a increased and is located directly above the folding roller 370. Then, the folding processing unit 3 presses the first crease 6a at this position.

As described above, the folding processing unit 3 according to the present embodiment adjusts the pressing position according to the position of the crease formed on the paper 6 based on the folding information and the paper information at the time of additional folding. There is. Therefore, the fold processing unit 3 according to the present embodiment can accurately press the crease even when the crease is not located at the tip of the paper 6 in the transport direction.

In the present embodiment, the fold in the transport direction rear end of the sheet 6 is not located, when the distance between the conveying direction end of the first fold line 6a and the paper 6 and L _3, FIG. 31 (a), the As shown in (b), the outer tri-fold and the Z-fold are cases where the _{total length of the paper 6 before folding in the transport direction> L 3} + L _{2 × 2.} Further, regardless of the folding method, if L _{1 −} L ₂ > 0, the crease is not located at the tip of the paper 6 in the transport direction.

Next, FIG. 32 (a) shows an operation example in which the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding when the crease is not located at the tip of the paper 6 in the conveying direction. , (B) will be described. 32 (a) and 32 (b) are views showing an operation example when the folding processing unit 3 according to the present embodiment adjusts the pressing position at the time of additional folding.

When the crease is not located at the rear end of the paper 6 in the transport direction, the fold processing unit 3 according to the present embodiment detects the second crease 6b formed on the paper 6 by the fourth paper detection sensor 394. I can't.

Therefore, in the folding processing unit 3 according to the present embodiment, when the crease is not located at the rear end of the paper 6 in the conveying direction, when adjusting the pressing position at the time of additional folding, as shown in FIG. 32 (a). after pressing the first crease 6a, a distance L ₂ that conveys the sheet 6, thereby adjusting the pressing position.

Alternatively, in the folding processing unit 3 according to the present embodiment, when the crease is not located at the rear end of the paper 6 in the transport direction, when adjusting the pressing position at the time of additional folding, as shown in FIG. 32 (b). after pressing the first fold line 6a, by moving the additional folding rollers 370 by a distance L _2, thereby adjusting the pressing position.

This distance L ₂ is the distance between the first fold 6a and the second crease 6b, and is a distance calculated based on the fold information regarding the folding method and the paper information regarding the paper size. Accordingly, the sheet 6 conveyed by the distance L ₂ will be located directly above the second fold line 6b is folding roller 370. Then, the folding processing unit 3 presses the second crease 6b at this position.

As described above, the folding processing unit 3 according to the present embodiment adjusts the pressing position according to the position of the crease formed on the paper 6 based on the folding information and the paper information at the time of additional folding. There is. Therefore, the fold processing unit 3 according to the present embodiment can accurately press the crease even when the crease is not located at the rear end of the paper 6 in the transport direction.

In the present embodiment, the fold in the transport direction rear end of the sheet 6 is not located, when the distance between the conveying direction leading end of the first fold line 6a and the paper 6 and L _4, FIG. 33 (a), the As shown in (b), the outer tri-fold and the inner tri-fold are cases where the _{total length of the paper 6 before folding in the transport direction> L 4} + L _{2 × 2.} Further, as shown in FIG. 33 (c), in the case of Z-folding, the crease is not located at the rear end of the paper 6 in the transport direction in any case. This is because, in Z-folding, the total length of the paper 6 before folding in the transport direction> L ₄ + L ₂ × 2. Further, regardless of the folding method, if L ₃ −L ₂ > 0, the crease is not located at the rear end of the paper 6 in the transport direction.

As described above, the folding processing unit 3 according to the present embodiment is formed on the paper 6 by adjusting the transport distance of the paper 6 or moving the additional folding roller 370 at the time of additional folding. The pressing position is adjusted according to the position of the crease. Therefore, the folding processing unit 3 according to the present embodiment can accurately press the crease even when the crease position is different for each paper.

Further, the folding processing unit 3 according to the present embodiment adjusts the pressing position according to the position of the crease formed on the paper 6 based on the folding information and the paper information at the time of additional folding. Therefore, the folding processing unit 3 according to the present embodiment can accurately press the crease even when the crease is not located at the front end of the paper 6 in the transport direction or the rear end in the transport direction. ..

In the present embodiment, the main control unit 101 conveys the amount of paper 6 according to the set values such as the folding method and folding position of the paper by the folding processing unit 3, the size of the paper to be folded, and the like. , S2, S3 are determined. Further, in the present embodiment, the main control unit 101 determines the amount of paper 6 conveyed to the pressing position by the additional folding roller 370 and the amount of movement of the additional folding roller 370 according to the above set values.

Here, the transport amount is a drive amount such as a transport distance and a transport time of the paper 6, a pulse count, a drive time, and a drive distance of a transport drive unit that drives the transport unit that transports the paper 6. Further, the moving amount is a driving amount such as a moving distance and a moving time of the additional folding roller 370, a pulse count, a driving time, and a driving distance of a moving driving unit for moving the additional folding roller 370.

Further, in the present embodiment, the configuration in which the image forming unit 2, the folding processing unit 3, the post-processing unit 4, and the scanner unit 5 are provided in the image forming device 1 has been described, but each unit is a different independent device. It may be configured and the devices may be linked to form an image forming system.

Further, in the present embodiment, an example in which creases are formed at two locations of the first crease 6a and the second crease 6b on the paper 6 has been described, but creases are formed at a plurality of locations of three or more locations. The same applies to the case where.

Embodiment 2.
As described with reference to FIGS. 17 to 20 and 21 to 24, the additional folding roller 370 according to the first embodiment has a convex pressing force transmitting portion on the peripheral surface of the pressing force transmitting roller 373. An example has been described in which the 372 is spirally arranged in the main scanning direction with a constant angle difference θ with the additional folding roller rotation shaft 371.

Therefore, the additional folding roller 370 according to the first embodiment rotates with the additional folding roller rotation shaft 371 as a rotation axis, thereby sequentially pressing the creases formed on the paper 6 in one direction in the main scanning direction. Can be done.

Therefore, the folding processing unit 3 according to the first embodiment can apply a concentrated pressing force over the entire crease in a short period of time. Therefore, the folding processing unit 3 according to the first embodiment can apply a sufficient pressing force to the crease without lowering the productivity while reducing the load on the additional folding roller rotating shaft 371. ..

In addition to such a configuration, the folding processing unit 3 according to the present embodiment applies a sufficient pressing force to the crease by rotating the additional folding roller 370 at a low speed during additional folding, except during additional folding. Explains an example configured to improve productivity by rotating the fold roller 370 at high speed. Hereinafter, a detailed description will be given. It should be noted that the same or equivalent parts will be indicated for the configurations to which the same reference numerals are given as in the first embodiment, and detailed description thereof will be omitted.

First, see FIGS. 34 (a) to 34 (d) for the first method for the folding processing unit 3 according to the present embodiment to apply a sufficient pressing force to the crease and improve the productivity. I will explain. 34 (a) to 34 (d) are diagrams showing an operation example in which the folding processing unit 3 according to the present embodiment applies a sufficient pressing force to the crease and improves productivity.

In the folding processing unit 3 according to the present embodiment, in order to apply a sufficient pressing force to the crease and improve the productivity, as shown in FIG. 34A, the additional folding roller 370 is in the home position. The rotation speed of the fold-back roller 370 from As shown in FIG. 27 (c), the rotation speed of the additional folding roller 370 when the additional folding roller 370 is pressing the paper 6 is V3, and as shown in FIG. 27 (d), the additional folding roller When the rotation speed of the fold roller 370 from when the 370 separates the paper 6 to when it returns to the home position is V4, the rotation speed of the fold roller 370 is V2 <V1, V2 <V3, V2 <V4. To control.

As described above, the folding processing unit 3 according to the present embodiment is sufficiently pressed against the crease by rotating the additional folding roller 370 at a low speed (V3) when the additional folding roller 370 is pressing the paper 6. It becomes possible to apply pressure. Further, at this time, the folding processing unit 3 according to the present embodiment rotates the additional folding roller 370 at a low speed (V3) when the additional folding roller 370 is pressing the paper 6, thereby forming the additional folding roller 370 and the paper. It is also possible to suppress the sliding noise with 6.

Further, the folding processing unit 3 according to the present embodiment can improve productivity by rotating the folding roller 370 at a high speed (V1 = V4) when the additional folding roller 370 is not in contact with the paper 6. It will be possible.

Further, in the folding processing unit 3 according to the present embodiment, the additional folding roller 370 and the paper support plate are rotated at a lower speed (V2) at the moment when the additional folding roller 370 comes into contact with the paper 6. It is possible to suppress the collision sound with the 380.

As described above, the folding processing unit 3 according to the present embodiment has the additional folding effect and the sliding sound by changing the rotation speed of the additional folding roller 370 according to the situation, such as V2 <V3 <V1 = V4. It is possible to simultaneously establish the three factors of suppressing the noise, improving the productivity, and suppressing the collision noise.

That is, in the folding processing unit 3 according to the present embodiment, in order to suppress the collision noise between the additional folding roller 370 and the paper support plate 380, the rotation speed of the additional folding roller 370 at the moment when the additional folding roller 370 comes into contact with the paper 6. V1 is controlled to be the smallest. On the other hand, in the folding processing unit 3 according to the present embodiment, in order to improve productivity, the rotation speed of the additional folding roller 370 when the additional folding roller 370 is not in contact with the paper 6 or pressed by the paper 6. V3 is controlled to be the largest.

As shown in FIGS. 35 (a) and 35 (b), the time required for pressing differs depending on the paper width, that is, the narrower the paper width, the shorter the time required for pressing. Therefore, the folding processing unit 3 according to the present embodiment calculates the time required for pressing from the paper width and the rotation speed of the additional folding roller 370, and as soon as the pressing is completed, the rotation speed of the additional folding roller 370 is changed from V3 to V4. change.

As described above, the folding processing unit 3 according to the present embodiment is configured to change the timing of changing the rotation speed of the additional folding roller 370 from V3 to V4 according to the paper width. Therefore, the folding processing unit 3 according to the present embodiment can further improve the productivity.

Next, regarding the first method for the folding processing unit 3 according to the present embodiment to apply a sufficient pressing force to the crease and improve the productivity, FIGS. 36 (a) and 36 (b) are shown. It will be explained with reference to. 36 (a) and 36 (b) are diagrams showing an operation example in which the folding processing unit 3 according to the present embodiment applies a sufficient pressing force to the crease and improves productivity.

In the folding processing unit 3 according to the present embodiment, in order to apply a sufficient pressing force to the crease and improve the productivity, as shown in FIG. 36A, the additional folding roller 370 has a paper thickness. The rotation speed of the fold-back roller 370 when pressing the thin paper 6 is V5, and as shown in FIG. 36 (b), when the fold-back roller 370 is pressing the thick paper 6. When the rotation speed of the fold roller 370 is V6, the rotation speed of the fold roller 370 is controlled so that V6 <V5.

As described above, the folding processing unit 3 according to the present embodiment increases productivity by rotating the additional folding roller 370 at a high speed (V5) when the additional folding roller 370 is pressing the thin paper 6. It is possible to improve. This is because the thinner the paper, the easier it is to strengthen the creases.

Further, the folding processing unit 3 according to the present embodiment is sufficient for creases by rotating the additional folding roller 370 at a low speed (V6) when the additional folding roller 370 is pressing the thin paper 6. It is possible to apply a large pressing force. This is because the thicker the paper, the more difficult it is to strengthen the creases.

As described above, the folding processing unit 3 according to the present embodiment achieves both the additional folding effect and the improvement of productivity by changing the rotation speed of the additional folding roller 370 according to the paper thickness, as in V6 <V5. It becomes possible to make it.

In the folding processing unit 3 according to the present embodiment, as the number of times of folding the paper increases, the overlap of the paper increases and the thickness thereof increases. Therefore, the same operation as shown in FIGS. 36 (a) and 36 (b) is performed. By changing the rotation speed of the additional folding roller 370 according to the number of foldings, it is possible to further achieve both the additional folding effect and the improvement of productivity.

As described above, the folding processing unit 3 according to the present embodiment gives a sufficient pressing force to the crease by rotating the additional folding roller 370 at a low speed at the time of additional folding, except at the time of additional folding. It is possible to improve productivity by rotating the additional folding roller 370 at high speed.

1 Image forming device 2 Image forming unit 3 Folding processing unit 4 Post-folding processing unit 5 Scanner unit 6 Paper 6a First crease 6b Second crease 10 CPU
20 RAM
30 ROM
40 HDD
50 I / F
60 LCD
70 Operation unit 80 Dedicated device 90 Bus 101 Main control unit 102 Engine control unit 103 Input / output control unit 104 Image processing unit 105 Operation display control unit 200 Print engine 201 Paper feed table 202 Print paper output tray 300 Fold processing engine 310 Entrance roller Pair 320 Resist Roller vs. 330 First Forward / Reverse Rotating Roller vs. 340 First Folding Roller vs. 350 Second Folding Roller vs. 360 Second Forward / Reverse Rotating Roller vs. 370 Extra Folding Roller 371 Extra Folding Roller Rotating Shaft 372 Pressurized pressure transmission unit 373 Pressurized pressure transmission roller 380 Paper support plate 391 First paper detection sensor 392 Second paper detection sensor 393 Third paper detection sensor 394 Fourth paper detection sensor 400 Post-processing engine 401 Post-processing paper discharge Tray 500 Scanner Engine 501 Paper Stand 502 ADF
503 Original Paper Ejection Tray 600 Display Panel 700 Network I / F

Japanese Unexamined Patent Publication No. 2007-045531 JP-A-2009-149435

In order to solve the above problem, one aspect of the present invention comprises a conveying means for conveying the sheet having a plurality of folds are formed, a pressing member for pressing said plurality of folds, than the pressing member the sheets in the sheet processing apparatus and a detection knowledge means you detect the end of the conveying direction of the sheet in the upstream side of said sheet, a first fold line downstream of the transport direction, wherein said When the second fold is provided on the upstream side of the transport direction with respect to the one crease and the second fold is not located at the upstream end of the sheet in the transport direction, the transport means. , said in conveyance of the sheet after pressing of the first crease by the pressing member to convey the distance the sheet from said first fold line to said second fold line on the downstream side in the transport direction, the after the transport, the pressing member, characterized in that pressing the said second folds.

Claims (8)

A transport unit that transports the crease-formed sheet,
A pressing portion that presses the crease of the sheet and
An end detection unit that detects the end of the sheet in the transport direction on the upstream side of the pressing portion in the transport direction,
In a sheet processing apparatus provided with a setting unit for setting the position of the crease.
Based on the set position of the crease, the transport portion transports the sheet in which the crease is formed to a position where the crease faces the pressing portion after the end portion in the transport direction is detected.
The pressing portion is a sheet processing device characterized in that it presses a crease of the conveyed sheet. A moving portion for moving the pressing portion in the transport direction of the sheet in which the crease is formed is provided.
The moving portion moves the pressing portion to a position where the pressing portion faces the crease based on the set position of the crease and the amount of the sheet on which the crease is formed by the conveying portion.
Based on the set position of the crease and the amount of movement of the pressing portion by the moving portion, the transport portion has the crease from the detection of the end portion in the transport direction to the position where the crease faces the pressing portion. Transport the formed sheet and
The sheet processing apparatus according to claim 1, wherein the pressing portion presses a crease of the conveyed sheet at a moved position. When the crease is formed at the end portion in the transport direction of the sheet, the transport portion is formed at a position where the end portion detection portion detects the end portion in the transport direction and the pressing portion after the end portion in the transport direction is detected. The sheet processing apparatus according to claim 1 or 2, wherein the sheet in which the crease is formed is conveyed by a distance from a position facing the portion. When the creases are formed at a plurality of positions of the sheet and the creases are not formed at the end of the sheet in the transfer direction, the end of the sheet is detected after the end of the sheet is detected. The crease was formed by the distance between the position where the portion detects the end portion in the transport direction and the position facing the pressing portion plus the distance between the crease of the sheet and the end portion in the transport direction. The sheet processing apparatus according to any one of claims 1 to 3, wherein the sheet is conveyed. When the crease is formed at a plurality of positions of the sheet and the crease is not formed at the tip of the sheet in the transport direction, the transport portion is located at the most end side of the folds formed at the plurality of locations in the transport direction. When the crease is pressed, after the tip of the sheet in the transport direction is detected, the distance between the position where the end detection unit detects the end in the transport direction and the position facing the pressing portion is set. The claim is characterized in that the sheet in which the crease is formed is conveyed by a distance obtained by adding the distance between the crease located closest to the tip end side in the transport direction and the tip end in the transport direction among the folds formed at a plurality of locations. The sheet processing apparatus according to any one of 1 to 4. In the transport portion, when the creases are formed at a plurality of locations of the sheet and the creases are not formed at the rear ends of the sheet in the transport direction, the most tip of the folds formed at the plurality of locations in the transport direction of the sheet. When the creases after the crease located on the side are pressed, after the tip in the transport direction of the sheet is detected, the end detection unit faces the position where the end in the transport direction is detected and the pressing portion. Any of claims 1 to 5, wherein the sheet in which the crease is formed is transported by a distance obtained by adding the distance between the crease to be pressed and the tip in the transport direction to the distance between the positions. The sheet processing apparatus according to item 1. One of claims 1 to 6, wherein the pressing portion sequentially presses the creases in the crease forming direction by rotating the axis parallel to the crease forming direction as a rotation axis. The sheet processing apparatus according to. An image forming apparatus that forms an image on the sheet,
An image forming system comprising the sheet processing device according to any one of claims 1 to 7, which presses a crease of the sheet on which an image is formed by the image forming device.

Images