JP2010001109A - Sheet treatment device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent reduction of alignment property of a bundle of sheets by preventing loading failure, and to prevent reduction of dignity of a binding product. <P>SOLUTION: Sheet pressing members 590a, 590b can be moved to a pressing position for pressing the bundle of sheets stacked on a sheet stacking part 530 and a retreating position spaced from the bundle of sheets and retreated in a direction crossing to a sheet conveying direction. Further, before the sheet is conveyed to the sheet stacking part 530 by crossing movement parts 600a, 600b, the sheet pressing members 590a, 590b are moved to the pressing position to press the bundle of sheets stacked on the sheet stacking part 530. Subsequently, after the sheet is conveyed to the sheet stacking part 530, the sheet pressing members 590a, 590b are moved to a retreating position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sheet processing apparatus that conveys a sheet to a sheet stacking unit to form a sheet bundle, and an image forming apparatus including the sheet processing apparatus.

  2. Description of the Related Art Conventionally, an image forming apparatus having a sheet processing apparatus that sequentially captures image-formed sheets, forms a sheet bundle, performs a binding process and a folding process near the center of the sheet bundle, and performs a saddle stitch bookbinding process to form a booklet. An apparatus is known (see Patent Document 1). For the sheet bundle that has been folded at the binding position and subjected to the saddle stitch binding process, the bookbinding product is discharged to a sheet stacking tray disposed outside the apparatus.

  An image forming apparatus including a sheet processing apparatus having a sheet folding processing unit that performs a predetermined folding process on a sheet to form a folded sheet is known (see Patent Document 2).

  In recent years, there has been proposed an image forming apparatus that performs saddle stitching using a sheet folded in advance by a sheet folding processing unit as a saddle sheet. By using a folded sheet for the middle paper of the bookbinding product, for example, a spread page can be created, and the added value of the bookbinding product can be improved.

JP 2007-62959 A JP 2001-26353 A

  However, in the above-described sheet processing apparatus, when a folded sheet having a fold line in a direction orthogonal to the sheet conveying direction is used as the middle sheet of the bookbinding product, the next sheet that has been conveyed to the folding opening side of the already loaded folded sheets. There was a risk that the sheet of rushed in. A specific example will be described. FIGS. 28 to 30 are explanatory views showing the vicinity of a sheet stacking unit in a conventional sheet processing apparatus. As shown in FIG. 28, the sheet processing apparatus includes a bookbinding processing tray (stacking unit main body) 560 that is inclined substantially vertically, and a sheet positioning member (sheet bundle receiving unit) that is disposed at the lower end of the bookbinding processing tray 560. 554). The sheets P are sequentially conveyed and stacked on the sheet stacking unit 530 to form a sheet bundle.

  Then, when the next sheet P ′ is conveyed after the folded sheet P stacked on the sheet stacking unit 530, the folded portion of the folded sheet P is in an open state as shown in FIG. In some cases, the next sheet P ′ enters the folding opening side of the folded sheet P.

  Further, even if the next sheet P ′ does not enter the folding opening side of the folded sheet P, as shown in FIG. 30, a gap is generated between the next sheet P ′ due to the opening of the folded sheet P. There is. If a gap is generated between the sheets as described above, the sheet that has been conveyed after that may enter the gap.

  Further, even if the sheet bundle stacked in the sheet stacking unit 530 does not include a folded sheet having a fold in a direction orthogonal to the sheet conveying direction, the sheet swells and a gap is generated between the sheets. Sometimes. For example, the sheet bundle includes a folded sheet having a fold in a direction parallel to the sheet conveying direction, or a sheet stacked on the bookbinding tray 560 is curled. If a gap is generated between sheets in the bookbinding tray 560 as described above, the next sheet conveyed to the bookbinding tray 560 may enter the gap.

  Then, when a stacking failure occurs in which the conveyed sheet enters the folding opening side of the folded sheet or enters the gap between the sheets, the consistency of the sheet bundle stacked on the sheet stacking unit is impaired. There is.

  SUMMARY An advantage of some aspects of the invention is that it provides a sheet processing apparatus and an image forming apparatus that prevent poor stacking and prevent deterioration of sheet bundle alignment. Is.

  The present invention relates to a sheet processing apparatus that processes a bundle of sheets including folded sheets, a sheet stacking unit for stacking conveyed sheets, a pressing position for pressing the sheets stacked on the sheet stacking unit, and a retreat separated from the sheet. A sheet pressing member movable to a position, and the sheet pressing member presses a folded portion of the folded sheet.

  In addition, the present invention includes an image forming unit that forms an image on a sheet, and the sheet processing apparatus that processes the sheet on which an image is formed by the image forming unit.

  According to the present invention, by pressing the sheet bundle conveyed to the sheet stacking unit by the sheet pressing member, it is possible to suppress the opening of the folded sheet and the generation of a gap between the sheets, and the conveyed sheet is folded to the folded sheet. It is possible to prevent stacking defects that enter the gaps between the sides and the sheets. Thereby, it is possible to prevent a decrease in the consistency of the sheet bundle.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a sectional view of a copying machine as an example of an image forming apparatus provided with a sheet processing apparatus according to an embodiment of the present invention.

  In FIG. 1, a copying machine 10 as an image forming apparatus includes a copying machine body 300 as an image forming apparatus body and an image reader 200 disposed on the upper surface of the copying machine body 300.

  Here, the image reader 200 that reads a document image includes a document feeder 100, a scanner unit 104, a lens 108, an image sensor 109, and the like. When reading the document D with the image reader 200, first, the user sets the document D on the tray 100 a of the document feeder 100. At this time, it is assumed that the document D is set with the face on which the image is formed on the tray 100a facing upward.

  Next, the document D set in this way is transported one by one from the first page in order to the left by the document feeder 100, and then transported from the left to the right on the platen glass 102 through a curved path. Thereafter, the paper is discharged onto the paper discharge tray 112.

  At this time, when reading the original by so-called flow reading, the scanner unit 104 is held in a predetermined position, and the original D passes through the scanner unit 104 from left to right. The reading process is performed. In this reading process, when passing through the platen glass 102, the document D is irradiated with light from the lamp 103 of the scanner unit 104, and the reflected light is imaged through the mirrors 105, 106, 107 and the lens 108. Lead to 109. The document image data read by the image sensor 109 is subjected to predetermined image processing and is input to the exposure control unit 110 as a video signal.

  On the other hand, when reading a document by so-called fixed reading, the document D transported by the document feeder 100 is temporarily stopped on the platen glass 102, and the scanner unit 104 is moved from left to right in this state, thereby moving the document. The reading process is performed. Further, when reading a document without using the document feeder 100, the user lifts the document feeder 100 and sets the document on the platen glass 102.

  Further, the copying machine main body 300 includes a sheet feeding unit 1002 that feeds the sheets P stored in the cassettes 114 and 115, and an image forming unit 1003 that forms an image on the sheet P fed by the sheet feeding unit 1002. And. The copying machine main body 300 further includes an operation display device 400 having a plurality of keys for setting various functions relating to image formation, a display unit for displaying information indicating the setting state, and the like.

  Here, the image forming unit 1003 includes a photosensitive drum 111, a developing unit 113, a transfer charging unit 116, and the like. When forming an image, a laser beam from the exposure control unit 110 is irradiated onto the photosensitive drum 111, thereby forming a latent image on the photosensitive drum 111. The developer 113 visualizes the toner image. A fixing unit 117, a discharge roller pair 118, and the like are disposed on the downstream side of the image forming unit 1003.

  The sheet feeding unit 1002 includes pickup rollers 127 and 128 for feeding out the sheets P stored in the respective cassettes 114 and 115, and separation roller pairs 129 and 130 including a feed roller and a retard roller. Then, only the uppermost sheet P of the cassettes 114 and 115 is separated and conveyed by the pair of separation rollers 129 and 130.

  Next, an image forming operation of the copying machine main body 300 having such a configuration will be described.

  First, as described above, the image data of the document D read by the image sensor 109 in the flow reading or the fixed reading in the image reader 200 is subjected to predetermined image processing, and then to the exposure control unit 110. Sent. The exposure control unit 110 modulates and outputs laser light based on the input video signal.

  The laser beam is irradiated onto the photosensitive drum 111 while being scanned by the polygon mirror 110a, and an electrostatic latent image corresponding to the scanned laser beam is formed on the photosensitive drum 111. Next, the electrostatic latent image formed on the photosensitive drum 111 is developed by the developing unit 113 and visualized as a toner image.

  On the other hand, the sheet P is conveyed from any of the cassettes 114 and 115, the manual sheet feeding unit 125, and the double-sided conveyance path 124 to a transfer unit including the photosensitive drum 111 and the transfer charger 116. Then, the toner image on the photosensitive drum 111 visualized in the transfer portion is transferred to the sheet P. Thereafter, the sheet P is subjected to a fixing process by the fixing unit 117.

  Next, the sheet P that has passed through the fixing unit 117 is once guided to the path 122 by the switching member 121, and after the trailing end of the sheet P has passed through the switching member 121, the sheet P is switched back, and the switching member 121 causes the discharge roller pair It is conveyed to 118 and discharged from the copying machine main body 300. As a result, the sheet P can be discharged from the copying machine main body 300 with the surface on which the toner image is formed facing down (face down).

  In addition, when image forming processing is performed in order from the first page by discharging the sheet P face-down by such so-called reverse paper discharging, for example, when image forming processing is performed using the document feeder 100. The page order can be aligned. Also, the page order can be aligned when image forming processing is performed on image data from a computer.

  When image forming processing is performed on a hard sheet P such as an OHP sheet conveyed from the manual sheet feeding unit 125, the surface on which the toner image is formed is faced up (face up) without guiding the sheet P to the path 122. ), The paper is discharged from the copying machine main body 300 by the discharge roller pair 118.

  When image forming processing is performed on both sides of the sheet P, the sheet P is guided straight from the fixing unit 117 toward the discharge roller, and the sheet P is switched back immediately after the rear end of the sheet P passes through the switching member 121. Then, the sheet is conveyed to the double-sided conveyance path 124 by the switching member 121. The sheet P guided to the duplex conveying path 124 is fed again between the photosensitive drum 111 and the transfer charger 116.

  Incidentally, the copying machine 10 includes a sheet processing apparatus 1000 that is disposed on the downstream side of the copying machine main body 300 in the sheet conveyance direction and that processes the sheet P on which an image is formed by the image forming unit 1003 of the copying machine main body 300.

  The sheet processing apparatus 1000 includes a sheet folding apparatus 700 serving as a sheet folding processing unit that performs folding processing on the image-formed sheet P discharged from the copying machine main body 300, and a finisher 500 that performs binding processing and bookbinding processing on the sheet P. And.

  The sheet P discharged by the discharge roller pair 118 of the copying machine main body 300 is sent to the sheet folding device 700 and selectively folded. The sheet P that has passed through the sheet folding apparatus 700 is sent to the finisher 500, and the finisher 500 performs various processes such as a binding process and a bookbinding process.

  Next, the sheet folding apparatus 700 will be described in detail. FIG. 2 is an explanatory diagram showing a sheet processing apparatus 1000 having a sheet folding apparatus 700 and a finisher 500. 3 and 4 are explanatory views showing the sheet folding apparatus 700. FIG.

  The sheet P discharged from the copying machine main body 300 is selectively guided to the conveyance path 150 or the reception conveyance path 152 of the sheet folding apparatus 700 by the switching member 151. For example, when an A3 size or B4 size sheet P is specified and the folding display is designated by the operation display device 400, the sheet P discharged from the copying machine main body 300 is guided to the receiving conveyance path 152 and the folding process is performed. Done.

  On the other hand, in other cases, the sheet P discharged from the copying machine main body 300 is guided to the conveyance path 150 and is conveyed to the finisher 500 as it is without being folded. As described above, in the sheet folding apparatus 700, the folding process for folding the sheet P in two is selectively performed.

  When performing a two-fold process having a fold in a direction orthogonal to the sheet conveyance direction, the sheet folding apparatus 700 guides the sheet P to the receiving conveyance path 152 shown in FIG. The sheet is conveyed and received by the sheet leading edge receiving stopper 154.

  At this time, a sheet leading edge stopper 154 shown in FIG. 3 is moved in the + direction (downward) or the − direction (upward) based on the sheet size and the folding amount information of the sheet P by a motor (not shown) and waits. . Thereby, it becomes possible to adjust the length from the fold to the end (folded end) of the folded portion of the folded sheet P. The sheet size and the folded sheet information of the sheet P are information sent from the copying machine main body 300.

  By the way, the conveyed sheet P may strike the sheet leading edge receiving stopper 154 vigorously and vibrate, or may jump on the sheet leading edge receiving stopper 154 and be inclined. When such a sheet P is folded by the folding rollers 155 and 156, the sheet P cannot be folded parallel to the leading end of the sheet P. As a result, the sheet P is wrinkled or the side edges of the folded sheet P cannot be aligned with each other, and one side edge protrudes from the other side edge, hindering the subsequent conveyance of the sheet P. May cause jams.

  Accordingly, in order to prevent the conveyed sheet P from jumping on the sheet leading edge receiving stopper 154, when the leading edge of the sheet P reaches slightly upstream from the sheet leading edge receiving stopper 154, the sheet leading edge detection sensor 157 causes the sheet P to be detected. The tip of is detected. Then, the conveyance motor M21 that rotates the conveyance roller pair 153 during the conveyance of the sheet P is stopped for the first time, and restarted after the predetermined time (first activation), and the leading edge of the sheet P is moved to the leading edge of the sheet P. It is brought into contact with the receiving stopper 154.

  As a result, the sheet P quietly lands on the sheet leading edge receiving stopper 154 without jumping on the sheet leading edge receiving stopper 154.

  Thereafter, the conveyance roller pair 153 continues to convey the sheet P while keeping the leading edge of the sheet P in contact with the sheet leading edge receiving stopper 154. The loop (curved) portion generated in the sheet P protrudes from the opening 159 of the guide wall 158 and approaches the nip portion of the folding rollers 155 and 156 in a buckled state.

  When the loop portion of the sheet P approaches the nip portion of the folding rollers 155 and 156, the conveyance motor M21 is stopped for the second time, and the second start is performed after the vibration of the loop portion is settled. For this reason, the loop portion is fed into the nip portion in a stable state. The second stop timing of the conveyance motor M21 is that the sheet leading edge detection sensor 157 detects the sheet leading edge before the leading edge of the sheet P contacts the sheet leading edge receiving stopper 154, and then the conveying motor M21 is started for the first time. This is based on the number of rotations since

  Note that when the sheet P approaches the sheet leading edge receiving stopper 154 or approaches the nip portion, the conveyance motor M21 is temporarily stopped (the first and second stops). Good. Accordingly, the sheet P is decelerated or temporarily stopped immediately before contacting the sheet leading edge receiving stopper 154 and immediately before being fed into the nip portion of the folding rollers 155 and 156, so that there is no wrinkling or misalignment. , Bend in exactly two.

  Thereafter, as shown in FIG. 4A, the folding rollers 155 and 156 fold the sheet P in half and convey it to the conveyance path 165. At this time, as shown in FIG. 4B, the length of the folded portion is the length to the end of the folded portion on the upstream side (from the leading edge of the original sheet P to the fold) in the sheet conveying direction. It will be in the state where it becomes shorter than the length to the edge part of the folding | turning part of a downstream side. And the folded sheet P formed in this way is conveyed in the state by which the crease | fold was formed in the downstream end side with respect to the sheet conveyance direction. The folded sheet P is sent to the finisher 500 by the discharge roller pair 166 through the conveyance path 165.

  Next, the finisher 500 will be described in detail. FIG. 5 is an explanatory diagram showing the configuration of the finisher 500.

  The finisher 500 sequentially takes in the sheets P discharged from the sheet folding device 700, aligns a plurality of the fetched sheets P and bundles them into one sheet bundle, and performs a stapling process that binds the rear end of the sheet bundle with staples. The finisher 500 also performs post-sheet processing such as punching, punching, sorting, non-sorting, and bookbinding, in which a hole is formed near the rear end of the fetched sheet P.

  The finisher 500 takes in the sheet P discharged from the sheet folding apparatus 700 into the inside by the pair of entrance rollers 501. A switching member 551 is disposed downstream of the entrance roller pair 501, and the switching member 551 guides the sheet P to the finisher path 515 or the bookbinding path 550. The sheet P guided to the finisher path 515 is sent toward the buffer roller 503 via the conveyance roller pair 502. An entrance sensor 570 is provided in the middle of the transport path between the entrance roller pair 501 and the transport roller pair 502.

  The buffer roller 503 is a roller capable of laminating a predetermined number of sheets P sent via the conveying roller pair 502 around the buffer roller 503, and winding the sheet P on the outer periphery of the buffer roller 503 during the rotation. It is wound by rollers 504, 505 and 506. The wound sheet P is conveyed in the rotation direction of the buffer roller 503.

  A switching member 507 is disposed between the pressing rollers 505 and 506, and a switching member 508 is disposed on the downstream side of the pressing rollers 506.

  The switching member 507 peels the sheet P wound around the buffer roller 503 from the buffer roller 503 and guides it to the non-sort path 509 or the sheet P wound around the buffer roller 503 to the buffer path 511. Further, the switching member 508 separates the sheet P wound around the buffer roller 503 from the buffer roller 503 and guides the sheet P to the sort path 510 or the buffer path 511 in a state where the sheet P wound around the buffer roller 503 is wound. A buffer path sensor 572 for detecting the sheet P on the buffer path 511 is provided in the middle of the buffer path 511.

  The sheet P guided to the non-sort path 509 is discharged onto the sample tray 580 via the discharge roller pair 512. A paper discharge sensor 571 is provided in the middle of the non-sort path 509.

  Further, the sheet P guided to the sort path 510 is stacked on the processing tray 520 through the conveying roller pair 513 and the conveying roller pair 514 disposed on the downstream side thereof. In the middle of the sort path 510, a sort path sensor 573 for detecting the sheet P passing through the sort path 510 is provided.

  The sheets P stacked in a bundle on the processing tray 520 are subjected to alignment processing, stapling processing, and the like by the alignment members 521 provided on the front side and the back side as necessary, and then are discharged by the discharge rollers 522a and 522b. It is discharged onto the stack tray 581.

  The discharge roller 522b is supported by a swing guide 524, and the swing guide 524 swings so that the discharge roller 522b contacts the uppermost sheet P on the processing tray 520 by a swing motor (not shown).

  When the discharge roller 522b is in contact with the uppermost sheet P on the processing tray 520, the discharge roller 522b cooperates with the discharge roller 522a to direct the sheet bundle on the processing tray 520 toward the stack tray 581. It is possible to discharge.

  The above-described stapling process is performed by the stapler 523. The stapler 523 is configured to be movable along the outer periphery of the processing tray 520, and can bind the sheet bundle stacked on the processing tray 520 at the last position (rear end) of the sheet P in the sheet conveyance direction. It is.

  Next, the sheet P guided to the bookbinding path 550 is conveyed to the sheet stacking unit 530 via the conveyance roller pair 552. A bookbinding entrance sensor 574 is provided in the middle of the bookbinding path 550. Then, the sheets are sequentially conveyed to the sheet stacking unit 530, and a sheet bundle is formed in the sheet stacking unit 530. In this sheet stacking unit 530, a sheet bundle for bookbinding is stacked.

  The sheet stacking unit 530 is movable as a bookbinding processing tray 560 serving as a stacking unit main body that is inclined substantially vertically and a sheet bundle receiving unit disposed at the lower end (downstream end in the sheet conveying direction) of the bookbinding processing tray 560. A sheet positioning member 554 of the type. An intermediate roller 553 is provided in the vicinity of the bookbinding tray 560. Further, an anvil (not shown) is provided at a position facing the stapler 555, and the stapler 555 and the anvil cooperate to perform a stapling process on the sheet bundle stored in the bookbinding processing tray 560. It has become.

  On the downstream side of the stapler 555, a folding roller pair 556 and a protruding member 557 are provided at positions facing the folding roller pair 556. By projecting the protruding member 557 toward the sheet bundle stored in the sheet stacking unit 530, the sheet bundle stored in the sheet stacking unit 530 is pushed out between a pair of folding rollers 556 as a folding unit. A pair of folding rollers 556 bends the sheet bundle and conveys the sheet bundle downstream. The folded sheet bundle is discharged to the outside of the apparatus or another apparatus via the conveying roller pair 558. A paper discharge sensor 575 is provided downstream of the conveying roller pair 558.

  Next, the operation in the bookbinding mode in the finisher 500 will be described. 6 to 10 are explanatory diagrams showing the operation in the bookbinding mode in the finisher 500. FIG.

  In the operation display device 400 in FIG. 1, when the bookbinding mode is designated by the user, the inlet roller pair 501 and the transport roller pair 552 are rotationally driven as shown in FIG. The sheet P discharged from the copying machine main body 300 is taken into the finisher 500 by the entrance roller pair 501.

  The switching member 551 is held in a state in which the sheet P is guided to the bookbinding path 550, and the sheet P passes through the bookbinding path 550 and is sequentially stored in the sheet stacking unit 530 by the conveyance roller pair 552.

  At this time, the intermediate roller 553 is rotated and conveyed until the leading end (downstream end) of the sheet P stored in the bookbinding tray 560 of the sheet stacking unit 530 comes into contact with the sheet positioning member 554. When the leading edge of the sheet P comes into contact with the sheet positioning member 554 and the conveyance is stopped, an alignment member (not shown) operates in the width direction orthogonal to the sheet conveyance direction, and the alignment of the sheet P in the width direction is performed.

  When a predetermined number of sheets P are aligned and stored, the sheet positioning member 554 is moved by the stapler 555 to the position where the staple processing (saddle stitching processing) is performed in the center of the sheet bundle as shown in FIG. Then, the stapler 555 performs saddle stitching processing at the center of the sheet bundle.

  Next, as shown in FIGS. 8 and 9, the sheet positioning member 554 is lowered to a position where the staple position (the center of the sheet P) becomes the center position of the folding roller pair 556. The folding roller pair 556 and the conveying roller pair 558 are driven to rotate, and at the same time, the protruding member 557 is protruded to push the sheet bundle between the folding roller pair 556.

  As shown in FIG. 10, the sheet bundle is folded by the folding roller pair 556 and conveyed downstream, and is discharged to the outside of the apparatus or to another apparatus by the conveying roller pair 558.

  FIG. 11 is a block diagram of the control device 800 of the copying machine 10.

  The control device 800 includes a CPU circuit unit 900 that controls the entire copying machine 10. The CPU circuit unit 900 includes a CPU 901, a ROM 902, and a RAM 903, and the ROM 902 stores a control program.

  The CPU circuit unit 900 controls the document feeder control unit 911, the image reader control unit 921, the image signal control unit 922, and the printer control unit 931 according to the settings of the control program and the operation display device control unit 941. Further, the CPU circuit unit 900 controls the finisher control unit 951 and the folding device control unit 961 according to the settings of the control program and the operation display device control unit 941.

  The RAM 903 temporarily stores control data and is used as a work area for arithmetic processing associated with control.

  The document feeder control unit 911 drives and controls the document feeder 100 based on an instruction from the CPU circuit unit 900. The image reader control unit 921 performs drive control on the scanner unit 104 and the image sensor 109 described above, and transfers an analog image signal output from the image sensor 109 to the image signal control unit 922.

  The image signal control unit 922 performs each process after converting the analog image signal from the image sensor 109 into a digital signal, converts the digital signal into a video signal, and outputs the video signal to the printer control unit 931. Further, the digital image signal input from the computer 904 via the external I / F 905 is subjected to various processes, and the digital image signal is converted into a video signal and output to the printer control unit 931. The processing operation by the image signal control unit 922 is controlled by the CPU circuit unit 900. The printer control unit 931 drives the above-described exposure control unit 110 based on the input video signal.

  The operation display device control unit 401 exchanges information between the operation display device 400 and the CPU circuit unit 900. The operation display device 400 (FIG. 1) includes a plurality of keys for setting various functions relating to image formation, a display unit for displaying information indicating a setting state, and the like. The operation display device 400 (FIG. 1) outputs a key signal corresponding to the operation of each key to the CPU circuit unit 900 and displays corresponding information on the display unit based on the signal from the CPU circuit unit 900.

  A finisher control unit 951 serving as a control unit is mounted on the finisher 500 and performs drive control of the entire finisher 500 by exchanging information with the CPU circuit unit 900. This control content will be described later.

  The folding device control unit 961 is mounted on the sheet folding device 700, exchanges information with the finisher control unit 951, and performs drive control of the entire sheet folding device 700.

  Next, the operation display device 400 will be described in detail. FIG. 12 is an explanatory diagram showing the operation display device 400 in the copying machine 10.

  The operation display device 400 includes a start key 402 for starting an image forming operation, a stop key 403 for interrupting the image forming operation, ten keys 404 to 413 for setting numerical values, an ID key 414, a clear key 415, A reset key 416 and the like are arranged. In addition, a liquid crystal display unit 420 having a touch panel formed thereon is disposed, and a soft key can be created on the screen.

  The copying machine 10 has various processing modes such as non-sorting, sorting, stapling sorting (binding mode), and bookbinding mode as post-processing modes. Such setting of the processing mode is performed by an input operation from the operation display device 400. For example, when setting the post-processing mode, when the “sorter” soft key is selected on the initial screen shown in FIG. 12, a menu selection screen is displayed on the display unit 420, and the processing mode is selected using this menu selection screen. Is set.

  Next, the flow of the bookbinding mode in the operation display device 400 will be described. 13 to 18 are explanatory diagrams illustrating the display unit 420 of the operation display device 400.

  First, when the user selects the “applied mode” soft key on the initial screen shown in FIG. 12, the display unit 420 switches to a screen for selecting various modes as shown in FIG. When “bookbinding” is selected by the user in this state, as shown in FIG. 14, a key capable of selecting a sheet P of a size to be used is displayed.

  Here, sheets P of different sizes are stored in the respective cassettes of the copying machine main body 300, and the user selects a cassette storing the sheets P to be used.

  When the user selects a cassette ("A3" cassette in FIG. 14) and presses the "Next" soft key, a screen for setting processing for a bundle of sheets to be bound as shown in FIG. It becomes.

  When the bookbinding mode is selected, at least the sheet bundle is folded, but the user can select whether or not to perform the saddle stitching process. The user can select either “saddle stitching” or “not saddle stitching”. Select the soft key. Furthermore, independent of the saddle stitching process, it is possible to select whether or not to use a folded sheet for the middle sheet of the sheet bundle.

  Here, regardless of the setting of the saddle stitching process, when “Don't insert origami” is selected and the “OK” key is pressed, the setting is completed.

  If “insert origami” is selected and the “OK” key is pressed regardless of the setting of the saddle stitching process, a screen for setting a page for inserting a folded sheet shown in FIG. Set the page to be used.

  The page setting of the folded sheet can be set to a plurality of pages, and the number of pages into which the folded sheet is to be input is input. When the page setting of the folded sheet is completed in FIG. 16, the cassette used for the folded sheet is selected in FIG. When a cassette to be used as a folded sheet is selected and the “OK” key is pressed, the length of the folded portion is set in FIG. Based on the folded sheet information including the length of the folded portion set here, the position of a sheet pressing member described later is determined.

  FIG. 19 is a schematic perspective view showing the vicinity of the sheet stacking unit 530 in the finisher 500.

  The finisher 500 includes a pair of sheet pressing units 595a and 595b disposed in the vicinity of the respective end portions in the width direction (arrow B direction) orthogonal to the sheet conveyance direction (arrow A direction) in the sheet stacking unit 530. The sheet pressing units 595a and 595b are arranged symmetrically with respect to the center in the width direction of the sheet stacking unit 530. Here, the XYZ orthogonal coordinates of the sheet pressing units 595 a and 595 b shown in FIG. 19 are symmetrical with respect to the center in the width direction of the sheet stacking unit 530.

  The sheet pressing units 595a and 595b include sheet pressing members 590a and 590b. Further, the sheet pressing units 595a and 595b are cross moving means for moving the sheet pressing members 590a and 590b in a direction orthogonal to the sheet conveying direction (X, Z direction and -X, -Z direction opposite to the X, Z direction). Are provided with cross moving parts 600a and 600b. Further, the finisher 500 includes parallel moving units 610a and 610b as parallel moving means for moving the sheet pressing units 595a and 595b in directions parallel to the sheet conveying direction (Y direction and -Y direction opposite to the Y direction), respectively. Yes. The parallel moving units 610a and 610b as the parallel moving means and the cross moving units 600a and 600b as the cross moving means constitute moving means for moving the sheet pressing members 590a and 590b. Here, the bookbinding tray 560 is inclined substantially vertically, the parallel moving portions 610a and 610b move in a substantially vertical direction, and the cross moving portions 600a and 600b move in a substantially horizontal direction. Will be.

  The sheet pressing members 590a and 590b are movably moved between a pressing position for pressing the sheet bundle stacked on the sheet stacking unit 530 and a retreat position that is separated from the sheet bundle and retracts in the width direction orthogonal to the sheet conveying direction. It is disposed above the positioning member 554.

  The sheet pressing members 590a and 590b are formed on the pressing surface 590A for pressing the sheet bundle to the bookbinding processing tray 560 which is the stacking unit main body side, and on the opposite side of the pressing surface 590A, and guides the sheet to the sheet positioning member 554. And a guide surface 590B. The guide surfaces 590B of the sheet pressing members 590a and 590b are inclined surfaces that incline toward the bookbinding tray 560 toward the upstream side in the sheet conveyance direction (arrow Y direction).

  The cross moving units 600a and 600b include motors M13 and M14, and belts 596a and 596b that transmit driving forces of the motors M13 and M14, respectively. Furthermore, the cross moving parts 600a and 600b are formed in a substantially disc shape, respectively, and include cam members 591a and 591b that are rotated by belts 596a and 596b about a rotation axis parallel to the sheet conveying direction. Further, the cross moving parts 600a and 600b are respectively provided with shafts 594a and 594b which are bent at L-shaped base ends and attached to the cam members 591a and 591b, and the tip ends are attached to the sheet pressing members 590a and 590b.

  20 and 21 are explanatory views showing the movement operation of the sheet pressing members 590a and 590b by the cross moving portions 600a and 600b.

  When the motors M13 and M14 are driven, the driving force is transmitted to the cam members 591a and 591b via the belts 596a and 596b (FIG. 19), the cam members 591a and 591b rotate, and the sheet pressing members 590a and 590b are pivoted. It operates via 594a and 594b.

  More specifically, the sheet pressing members 590a and 590b move in the width direction (the X direction and the −X direction opposite to the X direction) orthogonal to the sheet conveying direction by rotating the cam members 591a and 591b. . Further, the sheet pressing members 590a and 590b are moved toward and away from the sheet bundle stacked on the bookbinding processing tray 560 (as opposed to the Z direction and the Z direction) by rotating the cam members 591a and 591b. Z direction). As the cam members 591a and 591b rotate, the sheet pressing members 590a and 590b move between the pressing position (FIG. 20) and the retracted position (FIG. 21). That is, by driving the motors M13 and M14 of the cross moving portions 600a and 600b in the forward direction, the cam members 591a and 591b are rotated in the forward direction, and the sheet pressing members 590a and 590b are moved from the retracted position to −X / −. It moves in the Z direction and moves to the presser position (FIG. 20). On the contrary, by driving the motors M13 and M14 of the cross moving parts 600a and 600b in the reverse direction, the cam members 591a and 591b are rotated in the reverse direction, and the sheet pressing members 590a and 590b are moved from the press position to the X / Z. It moves in the direction and moves to the retracted position (FIG. 21).

  In this embodiment, the sheet pressing members 590a and 590b are operated by the motors M13 and M14. However, the present invention is not limited to this, and the pair of sheet pressing members 590a and 590b may be operated by one motor. Good.

  FIG. 22 is an explanatory diagram showing the movement operation of the sheet pressing members 590a and 590b by the parallel moving portions 610a and 610b.

  The sheet pressing members 590a and 590b can be moved along the sheet conveying direction by the parallel moving portions 610a and 610b. That is, as the sheet pressing units 595a and 595b move along the sheet conveying direction, the sheet pressing members 590a and 590b move along the sheet conveying direction.

  The translation units 610a and 610b include motors M10 and M11 disposed near the width direction end of the sheet stacking unit 530, and belts 593a and 593a that transmit the driving force of the motors M10 and M11 to the sheet pressing units 595a and 595b, respectively. 593b. The sheet pressing units 595a and 595b (that is, the sheet pressing members 590a and 590b) are movable in a direction parallel to the sheet conveying direction by driving the motors M10 and M11.

  In this embodiment, the sheet pressing units 595a and 595b are operated by the motors M10 and M11. However, the present invention is not limited to this, and the pair of sheet pressing units 595a and 595b may be operated by one motor. Good.

  Here, the cross moving units 600a and 600b and the parallel moving units 610a and 610b are driven and controlled by a finisher control unit 951 (FIG. 11) as control means.

  By the way, when the bookbinding mode is selected, as described with reference to FIGS. 6 to 10, the sheet bundle finally stacked on the sheet stacking unit 530 is folded by the folding roller pair 556 for bookbinding. . When the saddle stitching process described in FIG. 15 is set, the stapler 555 performs the saddle stitching process on the sheet bundle stacked on the sheet stacking unit 530. Thus, when the sheet bundle is processed and bound, the consistency of the sheet bundle is important. In other words, once the book is bound, it is difficult to correct it even if an attempt is made to correct the disordered sheet thereafter.

  Therefore, in the present embodiment, the sheet pressing members 590a and 590b are operated as follows.

  FIG. 23 is a flowchart showing a control operation of the sheet stacking process by the finisher control unit 951 when the bookbinding mode is selected. FIG. 24 is an explanatory diagram illustrating an operation of moving the sheet pressing members 590a and 590b to the folded end portion Pa of the folded sheet P. FIG. 25 is an explanatory diagram showing a state in which the sheet pressing members 590a and 590b are being moved from the retracted position to the pressing position. FIG. 26 is an explanatory diagram showing a case where the next sheet P ′ is conveyed in a state where the sheet pressing members 590a and 590b are moved to the pressing position. FIG. 27 is an explanatory diagram illustrating an operation of moving the sheet pressing members 590a and 590b from the pressing position to the retracted position.

  In the present embodiment, the initial position (home position) of each sheet pressing member 590a, 590b is the retracted position.

  Hereinafter, it demonstrates along the flowchart of FIG. 23, referring FIGS. 24-27.

  First, the finisher control unit 951 (FIG. 11) operates the conveyance roller pair 552 to convey the sheet to the sheet stacking unit 530 and complete the stacking of the first sheet P (S1).

  Next, the finisher control unit 951 determines whether the sheet P conveyed to the sheet stacking unit 530 is a folded sheet or whether the stacked sheet bundle includes a folded sheet (S2). .

  When the finisher control unit 951 determines that the sheet P conveyed to the sheet stacking unit 530 is a folded sheet (S2: Yes), the sheet presser is positioned at a position corresponding to the folded end portion Pa as shown in FIG. The members 590a and 590b are moved in the Y direction or the −Y direction (S3).

  Here, the folding end portion Pa of the folded sheet P refers to the folding of the shorter end portion of the folded sheet P in the sheet conveying direction among the two ends opposite to the fold when the sheet is folded. It is the end Pa. In the present embodiment, the folded sheet P is conveyed to the sheet stacking unit 530 so that the fold in the direction orthogonal to the sheet conveying direction is on the downstream side in the sheet conveying direction.

  Further, when the finisher control unit 951 determines that the folded sheet is included in the sheet bundle already stacked on the sheet stacking unit 530 (S2: Yes), the sheet pressing member is positioned at a position corresponding to the folded end portion Pa. 590a and 590b are moved in the Y direction or -Y direction (S3). When a plurality of folded sheets are included in the sheet bundle stacked on the sheet stacking unit 530, the sheet presser is positioned at a position corresponding to the folded end portion of the folded sheet positioned at the top of the plurality of folded sheets. The members 590a and 590b are moved. As described above, in S3, the sheet pressing members 590a and 590b are moved according to the position of the folded end portion Pa by the parallel moving portions 610a and 610b.

  Here, as shown in FIG. 24B, it is assumed that the sheet pressing members 590a and 590b are moved to the pressing position in a state where the sheet pressing members 590a and 590b are moved to positions different from the positions corresponding to the folding end portion Pa of the folded sheet P. . In this case, when the folded sheet P is curled, the folded end portion Pa of the folded sheet P is caught by the next conveyed sheet and bent, and the consistency of the sheet bundle may be impaired. There is.

  On the other hand, in this embodiment, as shown in FIG. 24A, the finisher control unit 951 corresponds to the folded end portion Pa of the folded sheet P stacked on the sheet stacking unit 530 in the sheet conveying direction. The sheet pressing members 590a and 590b are moved to the positions. More specifically, the finisher control unit 951 drives the motors M10 and M11 (FIG. 19) based on the folded sheet information, and corresponds to the folded end portion Pa of the folded sheet P stacked on the sheet stacking unit 530. The sheet pressing members 590a and 590b are moved to the positions to be moved. Here, the folded sheet information is information indicating the length in the sheet conveyance direction of the folded portion set by the user, as described with reference to FIG. Accordingly, even if the folded end portion Pa side of the folded sheet P is curled outward, the folded end portion Pa is pressed by the sheet pressing members 590a and 590b, and thus stacking failure can be suppressed. Thereby, the fall of the integrity of a sheet | seat can be prevented and by extension, the quality fall of a bookbinding product can be prevented.

  In S3, since the sheet pressing members 590a and 590b are moved in the Y direction or the −Y direction with the sheet pressing members 590a and 590b retracted to the retracted position, the sheet pressing members 590a and 590b move the sheet surface. There is no sliding while rubbing. Accordingly, the sheet alignment does not deteriorate, and the quality of the image formed on the sheet surface does not deteriorate. When the pressing surfaces 590A of the sheet pressing members 590a and 590b are smooth sliding surfaces, and there is no risk of sheet contamination or deterioration of alignment, the sheet pressing members 590a and 590b are moved to the pressing position. May be moved in the Y direction or -Y direction.

  Note that the finisher control unit 951 does not need to move the sheet pressing members 590a and 590b to the position corresponding to the folded end portion Pa already stacked on the sheet stacking unit 530, and therefore, the sheet pressing unit 951 is not required to move. The members 590a and 590b are held in that position.

  In the present embodiment, the sheet pressing members 590a and 590b are moved to positions where the sheet pressing members 590a and 590b straddle the folding end portion Pa of the folded sheet P as positions corresponding to the folding end portion Pa of the folded sheet P. . Accordingly, the folded sheet P can be effectively pressed, and even if the next sheet P ′ is conveyed, the next sheet P ′ does not enter the folding opening side of the folded sheet P.

  Next, after S3, the finisher control unit 951 moves the sheet pressing members 590a and 590b to the pressing position as shown in FIG. 25 (S4). Specifically, the finisher control unit 951 drives the motors M13 and M14 (FIG. 19) to rotate the cam members 591a and 591b in the forward direction to move the sheet pressing members 590a and 590b from the retracted position to −X / -Moved in the -Z direction to the presser position. As described above, before the sheet P ′ is conveyed to the sheet stacking unit 530, the sheet pressing members 590 a and 590 b are moved to the pressing position to press the sheet P previously stacked on the sheet stacking unit 530.

  After pressing the folded end portion Pa of the folded sheet P in S4, the finisher control unit 951 operates the conveying roller pair 552 to convey the next sheet P ′ to the sheet stacking unit 530, as shown in FIG. The stacking of the next sheet P ′ is completed (S5).

  At this time, although the sheet pressing members 590a and 590b are pressing the sheet bundle, the next sheet P 'is smoothly guided to the sheet positioning member 554 by the guide surfaces 590B of the sheet pressing members 590a and 590b. Accordingly, since the sheet P ′ is not caught by the sheet pressing members 590a and 590b, the sheet stacking failure is prevented, thereby preventing the sheet bundle alignment from being deteriorated, and hence the quality of the bookbinding product. Is prevented.

  At this time, the sheet pressing members 590a and 590b are sandwiched between the sheet P and the sheet P '. Next, as shown in FIG. 27, the finisher control unit 951 moves the sheet pressing members 590a and 590b from the pressing position in the X / Z direction to the retracted position (S6). That is, the sheet pressing members 590a and 590b move away from the surface of the sheet P by moving in the Z direction, and further retreat from between the sheet P and the sheet P ′ by moving in the X direction. . Accordingly, when the sheet pressing members 590a and 590b are retracted, the sheet P 'is not dropped and the sheet P' is not stacked properly.

  Next, the finisher control unit 951 determines whether or not all the sheets necessary for the set bookbinding have been stacked on the sheet stacking unit 530 (S8). When the stacking is completed (S8: Yes), the stacking process in the bookbinding mode is terminated and the bookbinding operation is started. If the loading is not completed (S8: No), the process proceeds to S2. In S2, when the sheet P conveyed to the sheet stacking unit 530 is not a folded sheet and a folded sheet is not included in the stacked sheet bundle (S2: No), the finisher control unit 951 The sheet is conveyed to the sheet stacking unit 530 to complete stacking (S7). Next, the process proceeds to S8.

  That is, not only when there is a folded sheet at the top of the sheet bundle, but also in the present embodiment, when the folded sheet is included in the sheet bundle (S2: Yes), the sheet bundle of the sheet stacking unit 530 is used as the sheet. The pressing members 590a and 590b are used for pressing. This is because the sheet bundle may swell when the folded sheet is included in the sheet bundle. Thereby, even when the sheet bundle is swollen by the folded sheets included in the sheet bundle, the swollenness of the sheet bundle is suppressed by the sheet pressing members 590a and 590b. Accordingly, it is possible to prevent the sheet conveyed to the sheet bundle from entering, and to prevent a stacking failure. As a result, it is possible to prevent a decrease in the consistency of the sheet bundle, and as a result, it is possible to prevent a decrease in quality of the bookbinding product.

  As described above, according to the present embodiment, before the sheet P ′ is conveyed to the sheet stacking unit 530, the sheet pressing members 590a and 590b are moved to the pressing position to press the sheet P previously stacked on the sheet stacking unit. As a result, the swelling of the sheet bundle of the sheet stacking unit 530 is suppressed. Then, when the next sheet P ′ is conveyed to the sheet stacking unit 530 with the sheet P being pressed, the sheet P is caught on the folding end portion Pa of the sheet P, or on the folding opening side of the sheet P which is a folded sheet. P ′ can be prevented from entering. Thereby, it is possible to prevent a decrease in the consistency of the sheet bundle. And when bookbinding, since the fall of the consistency of a sheet bundle is prevented, the quality reduction of a bookbinding product can be prevented.

  Although the present invention has been described based on the above embodiment, the present invention is not limited to this.

  In the above embodiment, the configuration for pressing a folded sheet having a fold in the direction orthogonal to the sheet conveying direction has been described. However, the present invention is effective even in a configuration for pressing a folded sheet having a fold in a direction parallel to the sheet conveying direction. is there. Further, the case where the folded sheet fold is conveyed to the sheet stacking unit so as to be on the downstream side in the sheet conveying direction has been described, but the folded sheet fold is conveyed to the sheet stacking unit so that it is on the upstream side in the sheet conveying direction. Even in this case, the present invention is effective.

  Further, in the above embodiment, when folded sheets are stacked on the sheet stacking unit 530, control is performed to press the sheet bundle by the sheet pressing members 590a and 590b. When the folded sheet is not stacked on the sheet stacking unit 530, the sheet pressing members 590a and 590b do not perform pressing control. However, the present invention is not limited to this, and as long as sheets are stacked on the sheet stacking unit, control for pressing the sheet bundle by the sheet pressing member may be performed. As a result, when there is a gap between the sheets for any reason, such as when the sheets are curled, the curling of the sheets can be suppressed so that the conveyed sheet enters the gap between the sheets. Can be prevented. As a result, it is possible to prevent a decrease in the consistency of the sheet bundle, and as a result, it is possible to prevent a decrease in quality of the bookbinding product.

  In the above embodiment, the case where the sheet pressing member moves in the width direction orthogonal to the sheet conveying direction (crosses at right angles) and moves to the pressing position and the retracted position has been described. It is not limited. That is, in the direction along the stacking surface of the sheet stacking unit, the sheet pressing member may be moved to the pressing position and the retreat position by moving in the direction intersecting the sheet conveying direction.

  Moreover, although the said embodiment demonstrated the case where a folding | turning part was pressed over the folding edge part Pa of the folding sheet P, it does not restrict to this. If there is no possibility that the next conveyed sheet will be caught by the folded end portion Pa, the folded portion between the folds of the folded sheet P and the folded end portion Pa may be pressed, and the sheet pressing member may be folded. The part Pa may not be straddled.

  Moreover, although the said embodiment demonstrated the case where the bookbinding processing tray 560 as a stacking unit main body inclined substantially perpendicularly, it is not limited to this. If the alignment of the sheet bundle is good, the inclination angle is not particularly limited. Further, the present invention is effective even if the bookbinding tray 560 is arranged vertically or horizontally.

  In the above-described embodiment, the case where the bookbinding processing tray 560 serving as the stacking unit main body and the sheet positioning member 554 serving as the sheet bundle receiving unit are separate bodies has been described.

1 is a cross-sectional view of a copier that is an example of an image forming apparatus including a sheet processing apparatus according to an embodiment of the present invention. It is explanatory drawing which shows the sheet processing apparatus which has a sheet folding apparatus and a finisher. It is explanatory drawing which shows a sheet folding apparatus. It is explanatory drawing which shows a sheet folding apparatus. It is explanatory drawing which shows the structure of a finisher. It is explanatory drawing which shows the operation | movement at the time of bookbinding mode in a finisher. It is explanatory drawing which shows the operation | movement at the time of bookbinding mode in a finisher. It is explanatory drawing which shows the operation | movement at the time of bookbinding mode in a finisher. It is explanatory drawing which shows the operation | movement at the time of bookbinding mode in a finisher. It is explanatory drawing which shows the operation | movement at the time of bookbinding mode in a finisher. It is a block diagram of a control device of a copying machine. It is explanatory drawing which shows the operation display apparatus in a copying machine. It is explanatory drawing which shows the display part of an operation display apparatus. It is explanatory drawing which shows the display part of an operation display apparatus. It is explanatory drawing which shows the display part of an operation display apparatus. It is explanatory drawing which shows the display part of an operation display apparatus. It is explanatory drawing which shows the display part of an operation display apparatus. It is explanatory drawing which shows the display part of an operation display apparatus. FIG. 6 is a schematic perspective view illustrating the vicinity of a sheet stacking portion in a finisher. It is explanatory drawing which shows the movement operation | movement of the sheet | seat pressing member by an intersection moving part. It is explanatory drawing which shows the movement operation | movement of the sheet | seat pressing member by an intersection moving part. It is explanatory drawing which shows the movement operation | movement of the sheet pressing member by a translation part. 10 is a flowchart illustrating a sheet stacking process control operation performed by a finisher control unit when a bookbinding mode is selected. It is explanatory drawing which shows the operation | movement which moves a sheet | seat pressing member to the folding end part of a folded sheet. It is explanatory drawing which shows the middle of moving the sheet pressing member from the retracted position to the pressing position. FIG. 10 is an explanatory diagram illustrating a case where a next sheet is conveyed in a state where a sheet pressing member is moved to a pressing position. It is explanatory drawing which shows the operation | movement which moves a sheet | seat pressing member from a pressing position to a retracted position. FIG. 10 is an explanatory view showing the vicinity of a sheet stacking unit in a conventional sheet processing apparatus. FIG. 10 is an explanatory view showing the vicinity of a sheet stacking unit in a conventional sheet processing apparatus. FIG. 10 is an explanatory view showing the vicinity of a sheet stacking unit in a conventional sheet processing apparatus.

Explanation of symbols

10 Image forming device (copier)
530 Sheet stacking unit 554 Sheet bundle receiving unit (sheet positioning member)
556 Folding means (folding roller pair)
560 Stacker body (bookbinding tray)
590a, 590b Sheet pressing member 590A Pressing surface 590B Guide surface 600a, 600b Moving means (cross moving part)
610a, 610b moving means (parallel moving part)
700 Sheet folding processing means (sheet folding apparatus)
1000 Sheet processing apparatus 1003 Image forming unit

Claims (7)

In a sheet processing apparatus that processes a sheet bundle including folded sheets,
A sheet stacking unit for stacking conveyed sheets;
A presser position that presses the sheets stacked on the sheet stacking unit, and a sheet presser member that is movable to a retracted position that is separated from the sheets,
The sheet pressing member presses a folded portion of the folded sheet;
A sheet processing apparatus. A moving means for moving the sheet pressing member;
The moving means moves the sheet pressing member according to the position of the end of the folded portion,
The sheet processing apparatus according to claim 1. The moving means is capable of moving the sheet pressing member along a sheet conveying direction,
When the folded sheet has a fold in a direction perpendicular to the sheet conveying direction, the moving means moves the sheet pressing member according to the position of the end of the folded portion in the sheet conveying direction.
The sheet processing apparatus according to claim 2. The sheet stacking unit includes a stacking unit main body disposed at an inclination, and a sheet bundle receiving unit disposed at a downstream end of the stacking unit main body in the sheet conveying direction,
The sheet pressing member includes a pressing surface that presses a sheet to the stacking unit main body side, and a guide surface that is formed on the opposite side of the pressing surface and guides the conveyed sheet to the sheet bundle receiving unit.
The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus. A sheet folding means for folding the sheet,
The folded sheet formed by the sheet folding processing means is conveyed to the sheet stacking unit.
The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus. A folding means for folding the sheet bundle stacked on the sheet stacking unit;
The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus. An image forming unit for forming an image on a sheet;
The sheet processing apparatus according to any one of claims 1 to 6, which processes a sheet image-formed by the image forming unit.
An image forming apparatus.

Images