JP2005254623A - Sheet processing device and image forming apparatus having same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet processing device capable of improving positioning accuracy when a bound bunch of sheets obtained by attaching a cover sheet to the bunch of sheets are cut, and an image forming apparatus. <P>SOLUTION: When a cover sheet P2 is attached to one end face of a bunch of sheets P1 to form a book, the cover sheet P2 is conveyed to a position where it is to be stuck to the one end face of the bunch of sheets P1, and then the cover sheet P2 is stuck to the one end face thereof such that one end of the cover sheet P2 is coincident with a predetermined one end of the bunch of sheets P1 or the predetermined one end of the bunch of sheets P1 is protruding from one end of the cover sheet P2. The predetermined one end of the bunch of sheets P1 is made to be an alignment reference for cutting the stuck bunch of sheets P1 and the cover sheet P2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sheet processing apparatus and an image forming apparatus provided with the sheet processing apparatus, and more particularly to a sheet bundle for adjusting the side face of a sheet bundle bound and bound with a cover sheet after an image is formed by an image forming unit, and The present invention relates to an apparatus provided with a sheet processing apparatus including a cutting means for cutting a side end portion of a cover sheet.

  2. Description of the Related Art Conventionally, image forming apparatuses such as copying machines, printers, facsimiles, and the like have a binding process for binding a bundle of sheets made up of a plurality of sheets and glue on one side in order to reduce the labor required for processing the sheets after the image is formed. There is a configuration in which a sheet processing apparatus such as a so-called finisher for selectively performing processes such as a gluing process to be applied and a cutting process to cut an end portion of a sheet is provided.

  As such a sheet processing apparatus, there is an apparatus in which a bundle of sheets on which an image is formed by an image forming unit and a cover are glued and bound (for example, see Patent Document 1). Further, after bookbinding in this way, there is one in which the side edges of the sheet bundle are trimmed by cutting the side surfaces of the bound sheet bundle and the cover by a cutting means.

JP 2002-234636 A

  By the way, in such a conventional sheet processing apparatus, when the sheet bundle and the cover sheet are glued, the sheet bundle is attached so as to be aligned with the center portion of the cover sheet. At this time, from the width (size) of the sheet bundle, If the cover has a wider width (size), the cover is glued (pasted) with the cover protruding beyond the sheet bundle.

  The sheet bundle glued in this way is placed on a rotating means for rotating the glue sheet bundle, and then conveyed to the cutting means by the conveying means, and 3 other than the gluing portion of the glue sheet bundle which is a bookbinding sheet bundle. Surfaces are sequentially cut.

  Here, before the sheet bundle is conveyed to the cutting means, when the side edges of the glue sheet bundle P3 are aligned by the alignment plate F315A as shown in FIG. Since it protrudes outside P1, it is the protruding portion of the cover sheet P2 that contacts the alignment plates R316A and F315A during alignment.

  Further, as shown in FIG. 22B, when cutting the side surface of the glue sheet bundle P3 perpendicular to the spine portion P21 of the cover sheet P2, the abutting member 318A that conveys the glue sheet bundle P3 to the cutting means is used. The contact also means the protruding portion of the cover sheet P2.

  Similarly, even when the cover width (size) is narrower than or equal to the sheet bundle width (size), depending on the set position in the width direction of the cover sheet P2 being conveyed, The end portion of the sheet P2 sometimes protrudes beyond the side end on the reference side (alignment plate R316A side) on which the sheet bundle P1 is aligned.

  When the glued sheet bundle P3 is aligned before cutting as described above, or when the glued sheet bundle P3 is conveyed to the cutting means, the protruding portion of the cover sheet P2 is placed on the alignment plates R316A and F315A and the abutting member 318A. When they come into contact with each other, the front end of the cover may buckle or the positions of the front cover and the back cover of the pasted sheet bundle P3 after pasting may shift. Further, in the pasted sheet bundle P3 after pasting, if the sheet bundle P1 and the cover sheet P2 are not sufficiently parallel, the positional accuracy of the cutting process may be greatly deviated.

  Therefore, the present invention has been made in view of such a current situation, and a sheet capable of improving the positional accuracy when the bookbinding sheet bundle bound by attaching a cover sheet to the sheet bundle is cut. It is an object of the present invention to provide a processing apparatus and an image forming apparatus including the processing apparatus.

  The present invention provides a sheet processing in which a cover sheet is attached to one end surface of a sheet bundle formed of images on which an image is formed, and then the side edges of the sheet bundle and the cover sheet are cut by a cutting means. In the apparatus, after the cover sheet is conveyed to a position where the cover sheet is attached to one end face of the sheet bundle, the cover sheet is placed on one end face of the sheet bundle, and one end of the cover sheet is a predetermined end of the sheet bundle. Or a predetermined end of the sheet bundle sticks out from one end of the cover sheet, and the predetermined end of the sheet bundle is used as a reference for alignment of the sheet bundle at the time of cutting. It is characterized by.

  Further, the present invention is provided in a cover sheet transport path for transporting the cover sheet to a position where the cover sheet is attached to one end surface of the sheet bundle, and when the cover sheet is attached to one end surface of the sheet bundle, Moving means for moving the cover sheet to a position where one end of the cover sheet coincides with one end of the sheet bundle, or a position where one end surface of the sheet bundle protrudes from one end of the cover sheet; It is characterized by that.

  Further, in the invention, the moving means is constituted by a conveying means that conveys the cover sheet to a pasting position and is movable in the width direction perpendicular to the conveying direction while the cover sheet is sandwiched. It is characterized by.

  According to the present invention, the moving means moves in the width direction orthogonal to the conveying direction of the cover sheet, contacts the end of the cover sheet in the width direction, and sets the position in the width direction of the cover sheet. It is characterized by comprising matching means for regulating.

  Further, the present invention abuts the conveying means for conveying the cover sheet, and the cover sheet which is provided on the downstream side in the conveying direction from the attaching position for attaching the cover sheet and is conveyed by the conveying means, An abutting plate that moves to the upstream side in the conveying direction and moves the cover sheet to the affixing position after the abutting, and the alignment means resists the abutting force of the conveying means The cover sheet is moved in a state in which the board moves the cover sheet to the attaching position.

  In the invention, it is possible to control the position of the abutting plate by including a detecting means for detecting a home position.

  Further, the present invention includes a sheet bundle conveying unit that conveys the sheet bundle to which the cover sheet is attached to the cutting unit, and a detecting unit that detects a home position of the sheet bundle conveying unit, and the detecting unit Thus, the conveyance distance of the sheet bundle conveyance means can be controlled.

  The present invention is characterized in that an aligning means for aligning the sheet bundle to which the cover sheet is attached is provided in the vicinity of the cutting means.

  According to the present invention, in the image forming apparatus, after attaching a cover sheet to an image forming unit that forms an image on a sheet and a sheet bundle that includes the sheet on which an image is formed by the image forming unit, the sheet bundle and The sheet processing apparatus according to any one of the above, wherein the side edge portion of the cover sheet is cut by a cutting means and bound.

  As described above, when binding a cover sheet to one end surface of a sheet bundle as in the present invention, the cover sheet is placed so that one end of the cover sheet coincides with a predetermined end of the sheet bundle. Or, a predetermined one end of the sheet bundle is pasted so that it protrudes from one end of the cover sheet, and the predetermined reference of the sheet bundle is used as an alignment standard when cutting the pasted sheet bundle and the cover sheet. Thus, it is possible to improve the position accuracy when the bookbinding sheet bundle is cut.

  Further, according to the present invention, when the side edge of the bookbinding sheet bundle is cut, the butting plate does not buckle because it comes into contact with the bonding surface of the sheet bundle having excellent rigidity and the cover sheet or the cut surface. Even if the positions of the front cover and the back cover of the bookbinding sheet bundle are misaligned or the parallelism between the sheet bundle and the cover sheet is not obtained, the positional accuracy at the time of cutting can be improved.

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

  FIG. 1 is a diagram illustrating a schematic configuration of a copying machine as an example of an image forming apparatus according to a first embodiment of the present invention.

  In this figure, A is a copying machine, and A1 is a copying machine main body. A sheet on which an image is formed by the image forming unit 3 provided in the copying machine main body A1 is aligned and glued and bound to this copying machine main body A1. Thereafter, a sheet processing apparatus B having a function of cutting is attached.

  Here, the copying machine main body A1 optically reads the original automatically fed from the original feeding apparatus 1 mounted on the upper surface of the main body by the optical means 2, and transmits the information to the image forming section 3 as a digital signal. It is recorded on a sheet such as plain paper or an OHP sheet.

  A sheet cassette 4, which is an example of a plurality of sheet storage units that store sheets of various sizes, is attached to the lower part of the copying machine main body A 1, and the sheet conveyed from the sheet cassette 4 by the conveyance roller 5 is attached to the sheet cassette 4. The image forming unit 3 records an image by electrophotography. Reference numeral 8 denotes a multi-tray that feeds a manual sheet and constitutes a sheet storage unit, and A2 is a control unit that controls an image forming operation and a sheet feeding operation of the image forming unit 3.

  Here, when an image is formed on a sheet, first, based on the information read by the scanner unit 2, a laser beam is irradiated from the light irradiation unit 3a to the photosensitive drum 3b to form a latent image, and then the latent image is formed. The toner is developed and transferred onto the sheet, and then the sheet on which the toner image has been transferred is conveyed to the fixing unit 6 and the toner image is permanently fixed on the sheet by applying heat and pressure.

  In the copying machine main body A1, when the single-sided recording mode is set, the sheet that has passed through the fixing unit 6 is sent to the sheet processing apparatus B. When the double-sided recording mode is set, the image is printed on one side. After passing through the fixing unit 6, the sheet on which is formed is first transported to the retransmission path 7 by switchback, and then transported again to the image forming unit 3 to form an image on the back surface. Thereafter, the sheet processing apparatus B To be sent to.

  Here, before the sheet is fed, a signal such as a sheet size is sent from the copying machine main body A1 to the sheet processing apparatus B, and a path in the sheet processing apparatus B is switched in advance. Further, the sheet can be fed not only from the sheet cassette 4 but also from the multi-tray 8.

  As shown in FIG. 2, the sheet processing apparatus B includes a conveyance alignment unit C that aligns sheets, and a trimmer unit D that constitutes a cutting unit, for example. Can be selected. The cutting in this cutting mode can be performed in three directions other than the glued surface.

  In the present embodiment, the sheet P discharged from the copying machine main body A1 to the sheet processing apparatus B is transported by the transport roller pairs 10a, 10b, 10c, and 10d and discharged to the stack tray 11 in the normal mode. In the glue binding mode, after glue binding, the sheets are discharged to the stacking tray E.

  In FIG. 2, 15 is a non-sort path, 16a is a bookbinding path, and 12 is a first flapper that switches between the non-sort path 15 and the bookbinding path 16a. Reference numeral 14 denotes a bookbinding middle paper path, reference numeral 16 denotes a front cover path, and reference numeral 13 denotes a second flapper for switching between the bookbinding middle paper path 14 and the front cover path 16.

  Reference numeral 35 denotes an alignment vertical path constituting storage means for sequentially storing the sheets P in an upright state when aligning the sheets P fed to the bookbinding paper path 14, and for example, the alignment vertical path 35 includes The trailing edge stopper 20 shown in FIG. 3 which is an alignment member provided at the bottom of the alignment vertical path 35 and the sheet P provided on one surface of the alignment vertical path 35 and discharged to the alignment vertical path 35 are Returning to the stopper side, for example, a return roller 19 that is a pressing means that presses the trailing end of the sheet P against the trailing end stopper 20, and a width direction that is a direction perpendicular to the sheet conveying direction by pressing the sheet P toward the sheet center. For example, an alignment vertical path plate 36 is provided as an alignment plate 21 that performs alignment and a holding unit that holds the discharged sheet P.

  Here, the alignment vertical path plate 36 is provided on the side of the alignment vertical path 35 facing the return roller 19, holds the sheet discharged to the alignment vertical path 35 in an upright state, and returns the discharge roller to the discharge sheet. It is for maintaining the contact pressure of 19 substantially constant.

  In the sheet processing apparatus B having the alignment vertical path 35 having such a configuration, when the glue binding mode is selected, the sheet P discharged from the copying machine main body A1 is first the first flapper 12 and the second flapper 12. The flapper 13 is switched and fed to the bookbinding paper path 14 by a pair of conveying rollers 10a, 17a, and 17b, and further discharged to an alignment vertical path 35 by a pair of discharge rollers 18.

  Next, the sheet P discharged to the alignment vertical path 35 in this way is returned by the return roller 19 to a position where the rear end abuts against the rear end stopper 20 as shown in FIG. At the same time, the alignment plate 21 pushes in the sheet center direction to perform alignment in the width direction.

  When the sheet P is discharged to the alignment vertical path 35, if the discharge speed of the discharge roller pair 18 is high, the sheet P that has passed through the discharge roller pair 18 is discharged so as to jump out, and it takes time to pull it back. End up. Therefore, in the present embodiment, a control unit (not shown) controls the rotation speed of the discharge roller pair 18 to be low when the trailing edge of the sheet P passes through the discharge roller pair 18. .

  As a result, the sheet P discharged to the alignment vertical path 35 is reliably pulled in by the rotation of the return roller 19, and the rear end alignment can be performed in a short time. Whether or not the trailing edge of the sheet has passed the discharge roller pair 18 in the control unit is determined by detecting the time after the sheet P passes the discharge sensor 22 or the motor rotation speed.

  Incidentally, the return roller 19 that pulls back the sheet P discharged onto the alignment vertical path 35 in the direction opposite to the discharge direction is configured to swing around the fulcrum 19a by the operation of the press contact solenoid 53 as shown in FIG. The arm 19A is rotatably held at one end thereof, and a driven roller 19b is disposed on the opposite side.

  The return roller 19 normally stands by at a retracted position indicated by a solid line in the drawing so as not to prevent the discharge of the sheet P discharged from the discharge roller pair 18. On the other hand, when one sheet P is discharged onto the alignment vertical path 35, the pressure contact solenoid 53 is actuated, thereby swinging to the position indicated by the broken line and one near the rear end of the sheet P on the alignment vertical path 35. Then, the sheet P is pulled back to the position of the trailing edge stopper 20 by rotating in the direction opposite to the sheet discharging direction.

  The return roller 19 is operated after the discharge roller pair 18 discharges the rear end of the sheet P. Specifically, after a lapse of a predetermined time after the trailing edge of the sheet P passes the discharge sensor 22 provided on the upstream side of the discharge roller pair 18, the pressure contact solenoid 53 is operated to press the return roller 19 against the sheet P. At the same time, the return roller 19 is rotated in the direction opposite to the sheet discharging direction.

  On the other hand, when the return roller 19 rotates in the direction opposite to the sheet discharge direction in this way, or at a predetermined time before that, the alignment vertical path plate 36 approaches the return roller 19, in other words, the alignment vertical path 35. It moves a predetermined amount in the narrowing direction. Thereafter, when the sheets P are sequentially stored in the alignment vertical path 35 and the number of stored sheets increases, the alignment vertical path plate 36 moves away from the return roller 19, in other words, the alignment vertical path 35 moves in a wider direction.

  When the number of sheets P stored in the alignment vertical path 35 is small as described above, the alignment vertical path plate 36 is moved in the direction in which the interval between the alignment vertical paths 35 is narrowed, thereby causing the sheet P to buckle. Can be prevented, and the contact pressure of the return roller 19 with respect to the sheet P discharged to the alignment vertical path 35 can be kept substantially constant, so that a return failure can be prevented.

  Further, as the number of stored sheets increases, the sheet P can be reliably returned even when the thickness of the sheet bundle is increased by moving the alignment vertical path plate 36 in the direction in which the interval between the alignment vertical paths 35 increases. Return failure can be prevented.

  The alignment vertical path plate 36 can be reciprocated in the direction of the arrow by a rack 36a formed on a part of the alignment vertical path plate 36 and a gear portion 207a of the alignment vertical path motor 207, thereby returning the return roller. 19 can be adjusted (interval of the alignment vertical path 35).

  Here, in this embodiment, the alignment vertical path plate 36 is moved according to the number information of the sheets P as shown in FIG. 4, but the number information of the sheets P from the copying machine main body A1 and the sheets. The alignment vertical path plate 36 may be moved in accordance with at least one of P thickness information or sheet P size information.

  Then, the alignment vertical path plate 36 is moved in accordance with at least one of the sheet number information, the sheet thickness information, and the sheet size information in this way, thereby curling due to the heat of the sheet P or the sheet P itself. It is possible to obtain a stable return force without the occurrence of buckling due to the influence of the weight of the sheet and the influence of the increase in the thickness of the sheet bundle P1, and to improve the consistency of the sheet P. it can.

  By the way, after that, the sheets P sequentially conveyed to the alignment vertical path 35 are pulled back by the return roller 19 and stacked in the alignment vertical path 35 until a predetermined target number of bundles are formed. For this reason, in the process of stacking and aligning the sheets P on the alignment vertical path 35 and then performing operations such as gluing, the bundle of sheets P continues to exist in the alignment vertical path 35.

  For this reason, the succeeding sheet P for the second bookbinding creation cannot be transported from the copying machine main body A1, and the operation such as the pasting of the first book ends, and the sheet bundle P1 is transferred from the alignment vertical path 35. Until the sheet is discharged, the conveyance of the sheet P is stopped, leading to a decrease in productivity.

  Therefore, in the present embodiment, the second booklet is created from the copying machine main body A1 until the first sheet bundle finishes the operation such as gluing and is discharged from the alignment vertical path 35. For this purpose, an alignment buffer plate 50 is provided in the vicinity of the alignment vertical path 35, which is a waiting means for temporarily waiting for the succeeding sheet P to be carried in.

  Here, as shown in FIGS. 3 and 5, the alignment buffer plate 50 includes a receiving table 50a that serves as a receiving portion for the sheet P, an alignment surface 50b that performs alignment in the width direction of the sheet P, and a receiving table 50a. And a separation wall 50c that separates the succeeding sheet P received by the cradle 50a and the sheet bundle P1 stored in the alignment vertical path 35, and is movable in the sheet width direction. Yes.

  5, M is a motor, and 52 is a rack 52 provided on the alignment buffer plate 50. By transmitting the rotation of the motor M to the rack 52 via an idler gear 57 and a gear 58, the alignment buffer plate 50 is It moves in the sheet width direction.

  In FIG. 5, reference numeral 59 denotes a photosensor, and a control unit (not shown) detects a protrusion 59 a provided at one end of the rack 52 by the photosensor 59, thereby positioning the alignment buffer plate 50 in the width direction. And the amount of movement is controlled. The alignment buffer plate 50 is retracted to the outside of the sheet P as shown in FIG. 6B except when the sheet P is temporarily retracted. There will be no hindrance to the transport.

  Next, the operation of the matching buffer plate 50 having such a configuration will be described.

  During normal alignment, the alignment buffer plate 50 has moved to a position where the cradle 50a is completely retracted in the sheet width direction, as shown in FIG. 6B, so as not to prevent the conveyance of the sheet P. . Then, the sheet P is discharged to the alignment vertical path 35, and the alignment buffer plate 50 is moved and aligned in the width direction of the sheet P at the timing when the trailing edge of the sheet contacts the trailing edge stopper 20, and after alignment, the alignment buffer plate 50 Return to the retracted position. This operation is performed for each sheet.

  On the other hand, at the time of buffering, that is, as shown in FIGS. 3 and 5B, there is a sheet bundle P1 that is stacked and aligned in the alignment vertical path 35 and is not yet discharged from the alignment vertical path 35. In some cases, since the sheet P conveyed continuously from the copying machine main body A1 is buffered, the sheet P can be received by the receiving base 50a, and the alignment surface 50b moves to a position retracted from the sheet P.

  Next, the alignment buffer plate 50 is moved and aligned in the width direction of the sheet P at the timing when the rear end of the sheet P comes into contact with the receiving table 50a, and after alignment, the alignment buffer plate 50 is received by the receiving table 50a. In addition, the alignment surface 50b is returned to the position retracted from the sheet P. This operation is performed for each sheet.

  Even if the alignment buffer plate 50 moves in this way, the separation wall 50c is in a position where the succeeding sheet P and the sheet bundle P1 stored in the alignment vertical path 35 can be separated. There is no mixing.

  Next, when the sheet bundle P1 is discharged from the alignment vertical path 35, the pressure contact solenoid 53 is operated to press the return roller 19 against the sheet P, and the sheet P buffered by the return roller 19 and the roller 19b is sandwiched.

  Next, the alignment buffer plate 50 is moved to a position retracted from the sheet P as shown in FIG. When the return roller 19 is driven after moving the alignment buffer plate 50 in this way, the rear end of the buffered sheet P is supported by the rear end stopper 20. Thereafter, the return roller 19 is stopped, the operation of the pressure contact solenoid 53 is stopped, and the return roller 19 is separated from the sheet P. Then, the above operation is repeated until the target number of bookbinding copies is completed.

  As described above, after a predetermined number of sheets are stored in the alignment vertical path 35, the alignment buffer plate 50 that sequentially stores and waits for subsequent sheets is provided in the vicinity of the alignment vertical path 35 and is stored in the alignment vertical path 35. After conveying a predetermined number of sheets, the sheets waiting on the alignment buffer plate 50 are stored in the alignment vertical path 35, whereby the sheets P continuously discharged from the copying machine main body A1 even during sheet processing such as stapling. It can be received and productivity decline can be prevented.

  Here, in the present embodiment, the alignment buffer plate 50 is provided integrally with the alignment plate 21 provided in the alignment vertical path 35. Then, by providing the matching buffer plate 50 and the matching plate 21 in this manner, the configuration becomes simple and the cost can be reduced.

  Next, cover conveyance will be described.

  A cover sheet P2 that is a cover discharged from the copying machine main body A1 is fed to the cover path 16 by the functions of the first flapper 12 and the second flapper 13. Here, as illustrated in FIG. 2 and FIG. 5A, the registration roller pair 23 is disposed in the cover path 16, and the registration leading edge sensor 23 a is disposed upstream of the registration roller pair 23.

  The registration roller pair 23 is stopped when the cover sheet P2 is guided to the cover path 16, and starts rotating after a predetermined time has passed since the front end of the cover sheet P2 contacts the registration roller pair 23. It is like that. By controlling in this way, a loop is formed at the front end of the cover sheet P2 guided to the cover path 16, and the skew of the cover sheet P2 is corrected, and then the cover sheet P2 is moved to a predetermined position of the gluing unit 25. Can move up to. Whether or not the front end of the cover sheet P2 has come into contact with the registration roller pair 23 is determined by detecting a motor rotation speed for a predetermined time after the cover sheet P2 passes the registration front end sensor 23a. Is possible.

  By the way, the registration roller pair 23 as an example of the moving means is configured to move in the width direction by a rack 38 via a cover motor 37 as shown in FIG. Then, after the rear end of the cover sheet P2 passes through the conveying roller pair 17a (see FIG. 5), the registration roller pair 23 moves in the direction b in a state where the cover sheet P2 is pressed and conveyed.

  In addition, when the cover sheet P2 shields the registration sensor 24 by such movement, the cover sheet P2 moves in the direction c. Note that the amount of movement of the registration roller pair 23 corresponds to the paper size signal received from the copying machine main body A1.

  Here, since the registration sensor 24 is disposed at the paper end position (side end position) of the sheet bundle P1 in the alignment vertical path 35, the sheet P2 in the cover path 16 and the sheet in the alignment vertical path 35 are located. The bundle P1 is located at a position shifted by a certain amount in the direction perpendicular to the sheet conveyance direction (crossing direction, sheet width direction), that is, as shown in FIG. Is positioned at a position where the one end protrudes to the alignment plate R316 side. Thus, as described later, when the cover sheet P2 is glued (attached) to one end surface of the sheet bundle P1, the predetermined end of the sheet bundle P1 is attached so as to protrude from one end of the cover sheet P2. Will be.

  By the way, after the cover sheet P2 is moved in this way, the sheet bundle P1 is guided to the cover sheet P2 by the gripper 41 (see FIG. 2) positioned below the alignment vertical path 35, and the center of the cover sheet P2 is reached. The rear end of the sheet bundle P1 is overlapped with the part, and thereafter, the glue binding unit 25 performs the glue binding operation.

  Here, as shown in FIG. 2 and FIG. 8, the gluing unit 25 includes a gutter 25a, a gluing roller 25b, a gluing 25c, a gutter heater 25d, a shaft 25e, and a gutter driving unit 25f.

  The eaves 25a can move in the width direction along the shaft 25e beyond the sheet width. The eaves 25a have two retracted positions outside the sheet width, and the eaves driving unit 25f is located between the two retracted positions. Is supposed to move by.

  Further, with the movement from one retracted position to the other retracted position, a part of the collar 25a pushes a part of the link 26 engaged with the rear end stopper 20, whereby the rear end stopper 20 is moved as shown in FIG. The sheet bundle P1 moves from the lower end (rear end) in the retracting direction. The glue roller 25b is attached to the flange 25a and is configured to rotate in synchronization with the movement of the flange 25a.

  The scissors heater 25d is attached to the outside of the scissors 25a, and when the bookbinding mode is started, the scissors heater 25d heats the scissors 25a to melt the glue 25c in the scissors 25a. Then, the glue roller 25b rotates as the collar 25a is moved by the collar drive section 25f, so that the glue 25c melted over the entire outer peripheral surface of the glue roller 25b is distributed.

  The sheet bundle P1 stacked in the alignment vertical path 35 is held by the gripper 41, and the collar 25a moves from one retracted position to the other retracted position, so that the trailing end stopper 20 is retracted from the lower part of the sheet bundle P1. The glue unit 25 applies the glue 25c to the lower end surface of the sheet bundle P1.

  Next, the bookbinding process will be described with reference to FIG.

  In FIG. 9, reference numeral 27 denotes a shutter path. This shutter path 27 is positioned downstream of the cover path 16 as shown in FIG. 9A before the bookbinding process is started, and the cover sheet P <b> 2 is removed. When transported, the shutter is closed by the shutter 27A.

  On the other hand, when the bookbinding process is started, the shutter rack 29 is driven by the shutter motor 28 and the shutter 27A is opened by the spring 30 that engages the shutter 27A and the shutter rack 29, and the shutter path 27 is opened, as shown in FIG. The shutter path 27 is opened by moving to the position where it is moved. After opening the shutter path 27, the shutter 27A comes into contact with a stopper (not shown) and stops.

  Thereafter, the gripper 41 is moved so that the glued sheet bundle P1 is pressed against the cover sheet P2 on the crease table 34 as described above, and the sheet bundle P1 is pressed against the cover sheet P2.

  Next, the shutter motor 28 is driven, and the cam 32 is rotated by the shutter motor 28 via the belt 31 as shown in FIG. Then, the crease table 34 performs crease for a certain period of time to complete the glue sheet bundle P3. The creasing table 34 is provided with a relief mechanism so as to cope with a change in the paper thickness.

  Further, as shown in (d), the creasing table 34 is retracted by rotating the cam 32, and thereafter, the glue sheet bundle P3 is pushed downstream by the pushing roller 39, and the bundle curvature path 40 (see FIG. 2). To the rotary stage 301 (see FIGS. 13 and 14) via the bundle curvature path 40.

  Here, the rotary stage 301 rotates the glue sheet bundle P3 and conveys it into the trimmer unit D. Next, the trimmer unit D and the rotary stage 301 will be described.

  First, the configuration of the trimmer unit D will be described. Here, the trimmer unit D is intended to finish a sheet bundle of higher quality, and the gluing unit 25 performs cutting on three surfaces excluding the glued end surface of the sheet bundle subjected to the gluing bookbinding. .

  FIG. 10 is a side view of such a trimmer unit D, in which 81 is a cutting blade for cutting the gluing sheet bundle P3. Here, the shape of the cutting blade 81 is plate-shaped and has an inclination on only one side, the longitudinal direction is longer than the maximum sheet size to be cut, and further moves in the longitudinal direction. Therefore, the cutting blade is always on the glued sheet bundle P3. The length on which 81 rides is required. For example, if the maximum sheet size is set when the longitudinal direction of A4 is cut, a length of 297 mm + the moving distance of the cutting blade 81 is required.

  The movement in which the cutting blade 81 cuts the sheet is performed while reciprocating in parallel with the cut surface, for example, when a tree is cut with a saw. The cutting blade 81 is fixed to a translation member 82 that can slide only in parallel to the cut surface of the glue sheet bundle P3.

  The parallel moving member 82 is supported by rollers 83a and 83b, and the abutments 84a and 84b provided on the parallel moving member 82 move in parallel with the cut surface along the rollers 83a and 83b. Further, the parallel movement of the parallel movement member 82 is performed by transmitting the drive of the horizontal motor 85 to the rotation receiver 87 via the rotation cam 86. The speed change of the reciprocating parallel movement can be freely changed by providing the horizontal motor 85 with an encoder.

  Reference numeral 88 denotes a vertical movement member for moving the cutting blade 81 in the thickness direction of the gluing sheet bundle P3. The vertical movement member 88 includes columns 89a and 89b coupled to the base 88A. It moves in the vertical direction along the groove 89b. Since the vertical moving member 88 includes rollers 83a and 83b that support the parallel moving member 82, when the vertical moving member 88 is moved in the vertical direction, the cutting blade 81 is also moved via the parallel moving member 82. Move vertically. Further, in order to apply a load to the cutting blade 81, the vertical moving member 88 is provided with tension springs 90a and 90b.

  These mechanisms allow the reciprocating motion of the cutting blade 81. Reference numeral 91 denotes a mat provided below the gluing sheet bundle P3 for the purpose of preventing the cutting blade 81 from being damaged. The mat 91 is preferably made of a soft material such as rubber, mold or urethane.

  Further, the mat 91 is formed in a roller shape, so that the cut chips can be dropped by rotation, and the dropped chips can be moved to a dust box 93 by a movable pusher 92 (see FIG. 2). It can be rotated and dropped.

  Furthermore, when the mat 91 and the cutting blade 81 come into contact with each other many times, a groove is formed in the mat 91, and the cut surface of the lowermost sheet of the sheet bundle (the sheet that is in direct contact with the mat 81) becomes rough. However, by forming the mat 91 in a roller shape, before the grooves are formed in the mat 91, the parts used so far are shifted and new grooves are formed. If the mat 91 is moved to an area where there is no mat, the durability of the mat 91 can be increased.

  FIG. 11 shows the structure of the sheet bundle pressing means for pressing the glued sheet bundle P3 when the glued sheet bundle P3 is cut, and the pressing means rotates the cam 94 as shown in FIG. As a result, the link 95 is actuated to compress the paper pressing spring 96, and the sheet presser 98 presses the glued sheet bundle P3. When this mechanism releases the sheet presser 98, it hits the abutting 88a of the vertical moving member 88 and moves the cutting blade 81 in the thickness direction of the glued sheet bundle P3 via the vertical moving member 88 as shown in FIG. It also serves as a means to make it happen.

  Next, an operation method of the trimmer unit D configured as described above will be described.

  As described above, the glue sheet bundle P3 is conveyed to the cutting position by the rotary stage 301. At this time, the cutting width of the glued sheet bundle P3 is about 2 to 20 mm. After the glue sheet bundle P3 is conveyed, the glue sheet bundle P3 is pressed by the sheet presser 98. At this time, the cutting blade 81 also moves through the vertical movement member 88 together with the sheet presser 98, so that the cutting blade 81 contacts the glued sheet bundle P3.

  Next, after the pressing of the glue sheet bundle P3 is completed, the cutting blade 81 is reciprocated in the horizontal direction by the horizontal motor 85 via the vertical moving member 88. Thereby, the glue sheet bundle P3 is cut, the cutting blade 81 is pulled by the tension springs 90a and 90b, and the cutting blade 81 moves in the thickness direction of the glue sheet bundle P3. Cutting by reciprocation is performed until the blade position sensor 97 is detected.

  Next, after cutting the glue sheet bundle P3, the sheet presser 98 is released, and the cutting blade 81 is retracted from the mat 91 at the same time. The chip P4 has some chips falling in the dust BOX 93 but not completely dropped, and some chips remain on the mat 91. The mat 91 is rotated to drop it into the forced dust box 93, and then the chips are pushed into the dust box 93 by pushing in the chips by the pusher 92. Then, after rotating the mat 91 in this way, the glued sheet bundle P3 is discharged to the stacking tray E by the rotary stage 301.

  12 is a control block diagram of the sheet processing apparatus B. In FIG. 12, reference numeral 200 denotes a CPU as control means for controlling the cutting operation and the like of the trimmer unit D. The CPU 200 includes a sheet size signal 9, Signals from the discharge sensor 22, the registration tip sensor 23a, the registration sensor 24, the photo sensor 59, the blade position sensor 97, the sensor 306, the sensor 308, the sensor 312, the sensor 319, and the like are input.

  Based on these signals, the shutter motor 28, the cover motor 37, the press contact solenoid 53, the horizontal motor 85, and the parallel motor 99, which are not described in the present embodiment, are described via the drivers D1 to D14. , First flapper solenoid 201, second flapper solenoid 202, non-sort path transport motor 203, bookbinding path transport motor 204, cover sheet path transport motor 205, alignment vertical path plate moving motor 207, lifting motor 303, transport belt motor F322, transport The belt motor R323 and the like are controlled in their movement amounts, speeds, and the like by control input pulses or encoder coder inputs that detect rotation amounts, respectively.

  Next, the rotation stage 301 will be described with reference to FIGS.

  In FIG. 13 and FIG. 14, 302 is a bundle conveyance unit provided on the rotary stage 301, and this bundle conveyance unit 302 is wound by winding a wire 305 fixed to an elevating gear 304 driven by an elevating motor 303. The rotary shaft 325 is rotated around. Normally, the bundle transport unit 302 stops the lifting motor 303 at a position where the sensor 302 detects the protruding portion 302a and stands by at the position shown in FIG.

  On the other hand, the glued sheet bundle P3 bound in the bookbinding process and transported to the bundle curving path 40 is then transported by the bundle transport roller pair 307. When the sensor 308 detects the leading end of the glued sheet bundle P3, this detection is performed. The first to fourth conveyor belts 309, 310, 320, and 321 are driven by the conveyor belt motor F322 and the conveyor belt motor R323, and rotate in the arrow direction shown in FIG.

  Then, the lifting motor 303 reverses at the timing when the rear end of the glue sheet bundle P3 conveyed into the conveyance path 311 of the bundle conveyance unit 302 by the bundle conveyance roller pair 307 passes through the sensor 308, thereby the bundle conveyance unit 302. Moves to the position shown in FIG.

  Thereafter, when the sensor 312 detects the protruding portion 302a of the bundle conveyance unit 302, driving of the lifting motor 303, the conveyance belt motor F322, and the conveyance belt motor R323 is stopped. As a result, the glue sheet bundle P3 waits while being sandwiched between the conveying belts 310 and 321 and the driven roller 314 at the tip of the weight 313.

  By the way, after that, as shown in FIG. 16, the glued sheet bundle P3 is positioned on the aligning board R316 side by the aligning plate F315 driven in the direction of the arrow by a motor (not shown). At this time, the glued sheet bundle P3 is As described above, since the cover sheet P2 is shifted and glued, it is the sheet bundle P1 of the glued sheet bundle P3 that contacts the alignment plate R316.

  Here, since the sheet bundle P1 has excellent rigidity, when the gluing sheet bundle P3 is positioned and aligned by abutting the sheet bundle P1 against the alignment plate R316 in this way, the gluing sheet bundle P3 is accurately aligned with the alignment plate R316. Can be positioned on the side.

  At the same time, the abutting plate 318 fixed to the timing belt 317 is designated from the position of the sensor 319 by driving the timing belt 317 by a motor (not shown) as shown in FIGS. The glued sheet bundle P3 is conveyed into the trimmer unit D. Here, at this time, the glue sheet bundle P3 is conveyed while its three sides are regulated by the alignment plates F315, R316 and the abutting plate 318, and the conveyance accuracy to the trimmer portion can be improved.

  Next, cutting is started by the trimmer unit D. Here, when cutting is started in this way, the alignment plates F315, R316 and the butting plate 318 move to the home position and stand by. When cutting is completed, the first to fourth conveyor belts 309, 310, 320, and 321 rotate counterclockwise, so that the glue sheet bundle P3 sandwiched between the weight rollers 314 is near the center of the glue sheet bundle P3. Then, the conveyor belts 309, 310, 320, and 321 stop at the position where the weight roller 314 is positioned.

  Thereafter, the conveying belts 309 and 310 and the conveying belts 320 and 321 rotate in opposite directions as shown by the arrows in FIG. 14, thereby rotating the glue sheet bundle P3 by 270 degrees around the weight roller 314. If the glue sheet bundle P3 is rotated by 270 degrees, the conveyor belts 309, 310, 320, and 321 are stopped, and the glue sheet bundle P3 is again aligned by the alignment plates F315, R316 and the abutting plate 318, and the trimmer. It is transported to a predetermined position in the unit D and cut.

  When the glue sheet bundle P3 rotates 270 degrees in this way, at this time, the surface already cut by the trimmer unit D comes into contact with the alignment plate R316 as shown in FIG. Here, since this cut surface is excellent in rigidity, the glued sheet bundle P3 can be accurately positioned on the alignment plate R316 side. Furthermore, since the end portion of the sheet bundle P1 in the glued sheet bundle P3 having excellent rigidity comes into contact with the abutting plate 318 and is conveyed, it is possible to improve the conveyance accuracy to the trimmer section.

  Thereafter, the glue sheet bundle P3 is conveyed to the weight roller 314 by the same operation and then rotated by 180 degrees. This time, as shown in FIG. 19, the abutting plate 318 is placed on the surface of the glue sheet bundle P3 cut this time. The abutting plate 318 is brought into contact with the trimmer unit D again, and the edge of the sheet bundle P1 in the glued sheet bundle P3 protruding from the cover sheet P2 is cut.

  Then, after the glue sheet bundle P3 having been cut on the three surfaces excluding the glue surface as described above is conveyed to the weight roller 314 and rotated by 90 degrees, the conveyor belts 309, 310, 320, and 321 shown in FIG. The sheet bundle P6 is conveyed to the stacking tray E by rotating in the arrow direction b).

  At the same time, by rotating the abutting plate 318 once in the direction of the arrow, the rear end portion of the glued sheet bundle P3 being conveyed operates so that the glued sheet bundle P3 can be reliably discharged to the stacking tray E. It is configured.

  As described above, when binding the cover sheet P2 to one end surface of the sheet bundle P1, the cover sheet P2 is bound from one end of the cover sheet P2 to a predetermined end of the sheet bundle P1. By sticking so as to protrude, the position of the glued sheet bundle P3 can be aligned with reference to the rigid sheet bundle P1 of the glued sheet bundle P3, and the position for cutting the glued sheet bundle P3 Accuracy can be improved.

  Further, by configuring as in the present embodiment, when the side edge of the glued sheet bundle P3 is cut, the abutting plate 318 is attached to the sheet bundle P1 and the cover sheet P2 having excellent rigidity, Or, it does not buckle because it abuts the cut surface, and even if there is a case where the positions of the front cover and the back cover of the glued sheet bundle P3 are shifted or the parallelism between the sheet bundle P1 and the cover sheet P2 does not appear. It is possible to improve the time position accuracy.

  In the description so far, when the cover sheet P2 is attached and bound, the cover sheet P2 has been described as being attached so that one end surface of the sheet bundle protrudes from one end of the cover sheet. The present invention is not limited to this, and the cover sheet may be glued so that one end of the cover sheet coincides with a predetermined end of the sheet bundle.

  By the way, in the description so far, the case where the registration roller pair 23 is moved in the width direction to paste the sheet bundle P1 and the cover sheet P2 in a shifted state has been described. Not limited to this, a mechanism for shifting the cover sheet P2 may be provided separately.

  Next, a second embodiment of the present invention in which a mechanism for shifting such a cover sheet P2 is separately provided will be described.

  FIG. 20 is a diagram illustrating a schematic configuration of the sheet processing apparatus according to the present embodiment. In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts.

  In the figure, reference numeral 404 denotes an abutting plate. A sheet P discharged from the copying machine main body A1 is fed to the cover path 16 by the action of the first flapper 12 and the second flapper 13, and is then arranged in the cover path 16. The transport roller 401 and the driven roller 402 are transported toward the abutting plate 404.

  Here, the abutting plate 404 can be reciprocated in the sheet conveying direction by the motor 403 and the rack 410, and the abutting plate 404 is formed on the photo sensor 412 and one end of the rack 410, The position and the amount of movement are controlled by the protrusion 411 that shields the photosensor 412. In the present embodiment, the abutting plate 404 stands by at a predetermined position corresponding to the sheet size signal from the copying machine main body A1 until the sheet P is conveyed.

  Reference numeral 405 denotes an alignment plate that is provided between the conveyance roller 401 and the abutting plate 404 and that moves the cover sheet P2 in a direction orthogonal to the sheet conveyance direction. The alignment plate 405 includes: It is movable in the width direction orthogonal to the sheet conveying direction.

  Here, the alignment plate 405 is movable in the width direction indicated by the arrow by transmitting the drive of the motor 420 to the rack 408 via the idler gear 406 and the gear 407 as shown in FIG.

  The alignment plate 405 is formed at one end portion of the photo sensor 409 and the rack 408, and its position and movement amount are controlled by a projection 408a that shields the photo sensor 409. The alignment plate 405 is retracted to the outside of the conveyed cover sheet P2 when the cover sheet P2 is being conveyed, and therefore does not hinder the conveyance of the cover sheet P2.

  In the sheet processing apparatus including the abutting plate 404 and the alignment plate 405 having the above-described configuration, the cover sheet P2 conveyed by the conveying roller 401, which is an example of conveying means, is first sheet size from the copying machine main body A1. The signal is received and conveyed until the tip abuts against the abutting plate 404 waiting at a predetermined position.

  In the present embodiment, the conveying operation is performed for a predetermined time even after contacting the abutting plate 404 in this way. For this reason, although the conveyance roller 401 is in a slip state, the cover sheet P2 can be reliably brought into contact with the abutting plate 404 by the slippage of the conveyance roller 401 in this way.

  Next, after the cover sheet P2 is brought into contact with the abutting plate 404 in this way, the abutting plate 404 is moved in the direction opposite to the conveying direction while resisting the conveying force of the conveying roller 401, and the cover sheet P2 is moved. Is transported to a predetermined position. Thereafter, the alignment plate 405 is moved in the width direction, and the cover sheet P2 is moved to a predetermined gluing position. If the cover sheet P2 is moved to a predetermined gluing position in this way, the driving of the conveying roller 401 is stopped.

  At this time, the positional relationship between the cover sheet P2 moved by the aligning plate 405 and the sheet end of the glue sheet bundle P1 in the align vertical path 35 is greater than the sheet end of the cover sheet P2 than the sheet end of the cover sheet P2. This has a relationship of jumping out (overhanging) from the back side of the sheet processing apparatus.

  In this way, the sheet edge of the glue sheet bundle P1 protrudes toward the back of the apparatus from the paper edge of the cover sheet P2, so that the rigid sheet bundle P1 of the glue sheet bundle P3 is changed. The position of the glued sheet bundle P3 can be aligned based on the reference, and the position accuracy when the glued sheet bundle P3 is cut can be improved.

  In the above description, the image forming operation of the image forming unit 3 is performed by the control unit A2 provided in the copying machine main body A1, and the cutting operation of the trimmer unit D is performed by the CPU 200 provided in the sheet processing apparatus B. Although the case where it was made to control was described, this invention is not limited to this, For example, you may make it perform the cutting operation control of the trimmer unit D by control part A2. Conversely, the image forming operation control of the image forming unit 3 may be performed by the CPU 200 provided in the sheet processing apparatus B.

  That is, in the description so far, the control means for controlling the image forming operation of the image forming unit 3 and the cutting operation of the trimmer unit D is provided in the control unit A2 and the sheet processing apparatus B provided in the copying machine main body A1. Although the case where it is configured by the CPU 200 has been described, the image forming operation of the image forming unit 3 and the cutting operation of the trimmer unit D may be performed by the control unit A2 or the CPU 200. That is, control means for controlling the image forming operation of the image forming unit 3 and the cutting operation of the trimmer unit D may be provided in the copying machine main body A1 or the sheet processing apparatus B.

1 is a diagram illustrating a schematic configuration of a copier that is an example of an image forming apparatus according to an embodiment of the present invention. The figure explaining schematic structure of the said sheet processing apparatus. The figure explaining the structure of the alignment vertical path | pass provided in the said sheet processing apparatus. The figure explaining the effect | action of the alignment vertical path board provided in the said alignment vertical path. The figure explaining the sheet | seat standby operation | movement by the buffer board provided in the said alignment vertical path. FIG. 10 is another diagram illustrating a sheet standby operation by the buffer plate provided in the alignment vertical path. FIG. 5 is a diagram for explaining skew feeding and registration alignment for a cover sheet in a cover path provided in the sheet processing apparatus. The figure explaining the structure of the pasting unit provided in the said sheet processing apparatus. The figure explaining the mechanism which is provided in the said sheet processing apparatus and pastes the sheet | seat for cover sheets to a sheet bundle. The side view of the trimmer unit provided in the said sheet processing apparatus. The figure explaining the mechanism of sheet bundle pressing provided in the above-mentioned trimmer unit. FIG. 3 is a control block diagram of the sheet processing apparatus. The side view explaining the structure of the rotation stage provided in the said sheet processing apparatus. The top view explaining the structure of the said rotation stage. The figure explaining the sheet | seat bundle conveyance operation | movement of the said rotation stage. The figure which shows the state which aligns the sheet bundle glued by the said gluing unit. The figure which shows the state which conveys the said glued sheet bundle to a trimmer unit. The figure which shows the state which finished the cutting operation | movement of the 1st end surface of the said glued sheet bundle, and rotated the sheet bundle by 90 degrees with the rotation stage. The figure which shows the state which finished the cutting operation | movement of the 2 end surface of the said glued sheet bundle, and rotated the sheet bundle by 180 degrees with the rotation stage. The figure explaining schematic structure of the sheet processing apparatus which concerns on the 2nd Embodiment of this invention. The figure explaining the mechanism which drives the aligning plate provided in the said sheet processing apparatus. The figure which shows the state which conveys the sheet | seat sheet | seat with a paste in the conventional sheet processing apparatus to a trimmer unit.

Explanation of symbols

3 Image forming unit 23 Registration roller pair 25 Gluing unit 200 CPU
301 Rotating stage 315 Alignment plate F
316 Alignment plate R
318 Abutting plate 401 Conveying roller 404 Abutting plate 405 Alignment plate 409 Photosensor 412 Photosensor A Copying machine,
B Sheet processing device D Trimmer unit P Sheet P1 Sheet bundle P2 Cover sheet P3 Gluing sheet bundle

Claims (9)

In a sheet processing apparatus for binding a cover sheet to one end face of a sheet bundle formed of images on which an image is formed, and then cutting the side edges of the sheet bundle and the cover sheet by a cutting means.
After transporting the cover sheet to a position where it is affixed to one end surface of the sheet bundle, the cover sheet is aligned with one end surface of the sheet bundle, and one end of the cover sheet coincides with a predetermined end of the sheet bundle. Or a predetermined end of the sheet bundle sticking out from one end of the cover sheet, and the predetermined end of the sheet bundle is used as an alignment reference of the sheet bundle at the time of cutting. Sheet processing apparatus.   One end of the cover sheet when the cover sheet is attached to one end surface of the sheet bundle provided in a cover sheet conveyance path for conveying the cover sheet to a position where the cover sheet is attached to one end surface of the sheet bundle. Comprising a moving means for moving the cover sheet to a position such that one end surface of the sheet bundle coincides with one end of the sheet bundle or a position where one end surface of the sheet bundle protrudes from one end of the cover sheet. The sheet processing apparatus according to claim 1.   The said moving means is comprised by the conveyance means which can be moved to the width direction orthogonal to a conveyance direction while conveying the said cover sheet to a sticking position, and pinching the said cover sheet. Item 3. The sheet processing apparatus according to Item 2.   The moving means is moved in a width direction orthogonal to the conveying direction of the cover sheet, and is aligned with a width direction of the cover sheet so as to regulate the position of the cover sheet in the width direction. The sheet processing apparatus according to claim 2, wherein the sheet processing apparatus is configured. Conveying means for conveying the cover sheet;
The cover sheet is provided on the downstream side in the transport direction from the attaching position for pasting the cover sheet and abuts against the cover sheet transported by the transport means. A butting plate that moves the sheet to the pasting position;
With
5. The aligning means moves the cover sheet in a state where the abutting plate moves the cover sheet to the attaching position against the conveying force of the conveying means. The sheet processing apparatus according to the description.   6. The sheet processing apparatus according to claim 5, wherein the position of the abutting plate is controllable by including a detecting unit that detects a home position.   A sheet bundle conveying unit that conveys the sheet bundle to which the cover sheet is attached to the cutting unit; and a detection unit that detects a home position of the sheet bundle conveying unit. 7. A sheet processing apparatus according to claim 6, wherein the conveying distance of the means is controllable.   The sheet according to any one of claims 1 to 7, wherein an alignment unit for aligning a sheet bundle to which the cover sheet is attached is provided in the vicinity of the cutting unit. Processing equipment.   An image forming unit that forms an image on a sheet, and a cover sheet that is attached to a sheet bundle made of the sheet on which an image is formed by the image forming unit, and then a side edge portion of the sheet bundle and the cover sheet is cut. An image forming apparatus comprising: the sheet processing apparatus according to claim 1, which is cut and bound by a sheet.

Images