JP4917807B2 - Sheet processing apparatus and image forming apparatus - Google Patents

Description

  The present invention provides a sheet for performing predetermined processing such as alignment, sorting, binding, punching, etc. on a sheet-like recording medium (hereinafter simply referred to as “paper”) such as a recording sheet, a transfer sheet, and an OHP sheet. The present invention relates to a processing apparatus and an image forming apparatus including the sheet processing apparatus.

  In the conventional sheet processing apparatus, when the binding means moves to the binding position, the abutting member is fixed to the processing tray, so that the abutting member of the sheet bundle interferes. In order to avoid this, when performing the binding operation, the binding means is once retracted to a position where it does not interfere with the abutting member and then moved to the binding position. Thus, when performing the binding operation to prevent the interference, the binding means must be moved in two directions, which increases the size of the apparatus and increases the cost. Therefore, in the invention described in Patent Document 1, the abutting member is retracted to a position that does not hinder the movement of the binding means in conjunction with the movement of the binding means.

Further, in order to retract the abutting member, it is necessary to hold the sheet bundle.For example, when performing an end binding process such as two-point binding, in order to retract the sheet abutting member to a position that does not interfere with the binding unit, The sheet bundle is held by a bundle conveying roller that conveys the sheet bundle to the saddle stitching position.
JP 2002-128383 A

  As described above, in the conventional sheet processing apparatus, when the binding unit moves to the binding position, in order to prevent interference with the abutting member, the binding unit is retracted, and the sheet bundle is held by the bundle conveying roller. In addition, it was necessary to move the sheet bundle. Thus, the retracting of the binding means and the movement of the sheet bundle have caused a reduction in processing time.

  Further, when the binding means and the abutting member are interlocked, the abutting member may be retracted depending on the binding position. Therefore, it is necessary to hold the sheet bundle before performing the binding process. When holding the bundle, there is a risk of shifting the aligned sheet bundle.

  The present invention has been made in view of the actual situation of the prior art, and the purpose thereof is to reduce the productivity even when the binding means interferes with the abutting member when moving to the binding position. It is to prevent the sheet bundle from shifting.

In order to achieve the object, the first means includes an abutting means for abutting and aligning the end of the sheet-like recording medium that has been carried in, and a binding means for binding the sheet bundle aligned by the abutting means. In the sheet processing apparatus, a support shaft that swingably supports the abutting unit is positioned above the binding unit, and a portion of the abutting unit that is positioned below the support shaft moves the binding unit. An abutment guide that is formed in an unobstructed shape and is rotatably mounted on the binding means when the abutment means is in the alignment position, and when the abutment means is in the alignment position, one of the binding means parts to the moving the binding unit while contact with the abutment means, characterized in Rukoto.

In the sheet processing apparatus based on the same premise as the first means, the second means includes means for allowing the binding means to move in a state where the abutting means is located at the alignment position, and the abutting means is aligned. An abutting guide which is opposed to the binding means when it is in the position is rotatably installed on the binding means, and when the abutting means is in the alignment position, the binding means while a part of the binding means is brought into contact with the abutting means. characterized Rukoto moving means.

The third means is a sheet processing apparatus based on the same premise as the first means, and when the sheet-like recording medium is stacked on the binding processing tray, the sheet-like recording medium is removed from the binding processing tray at the rear end fence. to guide Te pass is brought into contact with said abutment means, the conveyance guide of the sheet-like recording medium in which the abutment means said binding means in a state of being positioned in alignment position to allow the movement in the direction perpendicular to the sheet conveying direction the A binding means provided in the binding means is opposed to the binding means when the abutting means is in the alignment position, and is rotatably mounted on the binding means. When the abutting means is in the alignment position, a part of the binding means is characterized Rukoto moving the binding unit while contact with the abutment means.

According to a fourth aspect , the image forming apparatus includes the sheet processing apparatus according to any one of the first to third means.

According to the present invention, productivity of rather name be deteriorated, that no shifted sheet stack.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a system configuration of a system including an image forming apparatus PR and a sheet processing apparatus FR according to an embodiment of the present invention. As shown in FIG. 1, a sheet received from the image forming apparatus PR passes through an entrance conveyance path A having a post-processing unit (in the embodiment, punch unit 3 as a punching unit) on one sheet, and is guided to the proof tray 18. By the branching claw 24, the turn guide 36, the branching claw 25, and the turn guide 37, it is distributed to the upper conveyance path B, the intermediate conveyance path C leading to the shift roller 9, and the lower conveyance path D leading to the staple tray 10 for alignment and stapling. Configured as follows.
A common inlet conveyance path A upstream of the upper conveyance path B, intermediate conveyance path C, and lower conveyance path D has an inlet sensor 301 that detects a sheet received from the image forming apparatus PR, and a conveyance roller 31 downstream thereof. The punch unit 3 and the branching claw 24 and the turn guide 36 are sequentially arranged downstream thereof. The branching claw 24 is held in the state of the solid line in FIG. 1 by a spring (not shown). When the solenoid (not shown) is turned on, the branching claw 24 is rotated to the state of the one-dot chain line. If it is OFF, the paper is distributed to the upper conveyance path B and discharged to the proof tray 18 by the proof discharge roller 7. The branching claw 25 is rotated to the state of a one-dot chain line by a spring (not shown) and distributes the sheet to the intermediate conveyance path C. If the solenoid is OFF, the sheet is conveyed to the lower conveyance path D as it is.

  The intermediate conveyance path C is provided with a shift roller 9 that can move the sheet by a certain amount in the conveyance direction and the orthogonal direction. The sheet sent to the intermediate conveyance path C via the conveyance roller 32 and the turn guide 37 moves by a fixed amount in the direction perpendicular to the conveyance direction while being conveyed by the shift roller 9 by a driving means (not shown), so that the sheet is perpendicular to the conveyance direction. The sheet is discharged by the discharge roller 15 in this state, and is stacked on the sheet discharge tray 17. The timing is determined based on paper detection information of the entrance sensor 301, paper size information, and the like.

  A staple tray discharge sensor 302 is provided in the lower transport path D, and serves as a trigger for the alignment operation when the sheets are present in the transport path and the sheets are discharged to the staple tray 10. The sheets sent to the conveyance path D are sequentially conveyed by the conveyance rollers 33, 34, and 35 and are aligned after being stacked on the staple tray 10.

  The paper transported on the staple tray 10 is aligned in the direction perpendicular to the paper transport direction by the jogger fence 12 on the staple tray 10, and the transport direction is tapped by the roller 8 to move the trailing edge fence 27, which is a paper abutting member. Harmonized with standards. Thereafter, in the case of edge binding, the staple unit 5 performs the binding process at a predetermined position, is conveyed upward by the discharge claw 11 attached to the discharge belt 14, and is discharged to the discharge tray 17 by the discharge roller 15 and stacked. Is done. A paper surface detection sensor 303 is arranged so that the height of the paper discharge tray 17 can be lowered according to the amount of paper to be discharged.

  On the other hand, in the case of saddle stitching, after the sheet bundle is aligned with reference to the rear end fence 27, the rear end fence 27 is retracted, and is bundled and conveyed downward by the bundle conveying roller pair 13a, 13b. The stapler unit 5 performs a binding process. When the saddle stitching process is completed, the sheet is transported to the folding position by the bundle transport roller pair 26a and 26b, the center folding process is performed by the folding plate 19 and the folding roller 20, and the middle folding sheet discharge roller 22 performs the middle folding sheet discharge tray 23. The paper is discharged and stacked.

  The staple unit 5 includes a driver unit 5a for driving out the needle and a clincher unit 5b for bending the tip of the needle driven into the sheet bundle. In the staple unit 5 in the present embodiment, the driver unit 5a and the clincher unit 5b are configured separately, and can be moved in a direction perpendicular to the sheet bundle conveyance direction by the stapler moving guide 6, and the driver unit 5a and the clincher unit are arranged. 5b includes a relative positioning mechanism and a moving mechanism (not shown). The binding position in the conveyance direction of the sheet bundle is performed by conveying the sheet bundle by the bundle conveyance roller pair 13a and 13b. Thus, the binding process can be performed at various positions of the sheet bundle.

  FIG. 2 is a perspective view showing the staple unit 5 and the moving mechanism of the staple unit 5. In this figure, when the motor gear 70 is driven, it is driven by a gear pulley 71b fixed to the end of the drive shaft 71a on the driver portion 5a side and a pulley 71c fixed to the end of the drive shaft 71a on the clincher portion 5b side. Is transmitted. On the opposite side of the gear pulley 71b and the pulley 71c, a tighter pulley 73 is installed, and a timing belt 72 is stretched over each, and tension is applied by pressure means (not shown).

  The stapler moving guide 6 is provided with a driver portion 5a via a bearing 80 and a driver base 81. The clincher portion 5b is provided via a bearing 80, a clincher base 82, and a core position adjustment bracket (not shown) of the stapler unit 5a. ing. A roller 85 is provided on each of the driver base 81 and the clincher base 82, and the rollers 85 abut against the driver stay 83 and the clincher stay 84, respectively, due to the weights of the driver portion 5a and the clincher portion 5b.

Since the timing belt 72, the driver base 81, and the clincher base 82 are fixed by the stopper 74, the stapler unit 5 moves along the stapler moving guide 6, the driver stay 83, and the clincher stay 84 by driving the motor pulley 70. It will be. The driver base 81 is provided with a filler 81a, and the stapler unit 5 is detected by an HP sensor 305 installed in a housing (not shown).
3 is a plan view of the stapler unit 5, and FIG. 4 is a front view. A conveyance guide 90 is fixed to the driver portion 5a, and a taper portion 90a is provided at both ends of the rear end fence guide 90, and an upper portion is provided. A tapered portion 90b is provided.

FIG. 5 is a perspective view for explaining the pressure releasing mechanism of the bundle conveying roller pair 13a and 13b and the retracting mechanism of the rear end fence 27. FIG.
In FIG. 5, when the motor pulley 50 is driven, the drive is transmitted to the gears 52b fixed to both sides of the shaft 52a via the gears 51. Cams 53 integrated with a gear are arranged on both sides of the bundle conveying roller 13a fixed to the staple tray so as to rotate about the roller shaft. The cam 53 is rotated by transmission from the gear 52b. Lifts the sliders 54 arranged on both sides of the movable bundle conveying roller 13b so as to rotate around the roller shaft, thereby releasing the movable bundle conveying roller 13b along the inner diameters of the bearings 55 on both sides. Further, since the movable bundle conveying roller 13b is pressurized by a pressure member (not shown) in the direction of the fixed bundle conveying roller 13a, the bundle conveying roller 13b is changed by changing the rotation angle of the cam 53. It is moved to pressurize 13a.

  Further, a gear integral with the cam 53 and a gear 60b fixed to one of the rear end fence drive shafts 60a are connected, and a lever 60c fixed to the other end of the rear end fence drive shaft 60a by the rotation of the cam 53. Will rotate. The rear end fence 27 is fixed to the rotation shaft 63a, and a lever 63b fixed to one of the rotation shafts 63a is transmitted to the rear end fence 27 via the bearing 61 and the link 62, and the rear end fence 27 is moved to the paper. It is configured to project and retract in the abutting direction. The rotating shaft 63a is fixed to the staple tray 10 via the bracket 110 and the bearing 111 as shown in FIG. The HP sensor 304 detects a filler formed on the lever 60c.

  The gear integrated with the cam 53 and the gear 60b fixed to the rear end fence drive shaft 60a have the same number of teeth as the gear of the cam 53, and when the cam 53 makes one rotation, the movable bundle conveying roller 13b and the rear end fence 27 is configured to return to the original position. Further, when the rear end fence 27 protrudes in the sheet abutting direction, the position is determined by the rear end fence 27 abutting against the clincher guide 91, and the pressure applied between the bearing 61 and the link 62 is determined. The member is pressurized by the lever 63b, pressure is applied to the rear end fence 27 via the rotating shaft 63a and the lever 63b, the clincher guide 91 which is the abutting member shown in FIG. The sheets are aligned so as not to fall from the fence 27.

As described above, in this embodiment, the contact of the rear end fence 27, the retracting mechanism, the pressurization of the bundle conveying roller 13b, and the driving of the releasing mechanism are shared.

  6A shows the contact position (paper alignment position) of the rear end fence 27, and FIG. 6B shows the retracted position. The rotating shaft 63a and the drive mechanism of the rear end fence 27 are located above the driver unit 5a. It arrange | positions so that it may not interfere at the time of the movement of the driver part 5a and the clincher part 5b. FIG. 7 shows the relationship with the staple unit 5 when the rear end fence 27 is retracted. 6A corresponds to the position of the rear end fence 27 in FIG. 4, and the state in FIG. 6B corresponds to the position of the rear end fence 27 in FIG.

  FIG. 4 shows the contact position (paper alignment position) of the rear end fence 27, and the rear end fence 27 can contact the clincher guide 91 to align the paper. The taper portions 90a described above are provided at both ends of the rear end fence guide 90, and the taper portions 90a scoop up the rear end fence 27 as shown in FIGS. The stapler unit 5 is moved while the rear end fence guide 90 is in contact therewith. Further, when the sheets are stacked on the staple tray 10 by the taper portion 90 b, the sheets are transferred from the staple tray 10 to the rear end fence guide 90 and brought into contact with the rear end fence 27.

  The rear end fence guide 90 is fixed to the driver unit 5a. However, since the sheet passing surface 90c of the conveyance guide 90 protrudes from the needle-out unit 5b of the driver unit 5a, the driver unit 5a is moved when the stapler unit 5 is moved. The needle lead-out portion 5b of 5a and the rear end fence 27 are prevented from sliding.

Further, at the contact position of the rear end fence 27, the clincher guide 91 is pressed against and pressed by the mechanism shown in FIG. The clincher guide 91 is installed on a driver guide 92 supported by a housing (not shown) so as to rotate about a rotating shaft 91a, and the abutting portion 91b is abutted against the driver guide 92 by a spring (not shown). . When the transport guide 90 and the rear end fence 27 are overlapped due to positional variation when the stapler unit 5 is moved, the rear end fence 27 is pressed by the rear end fence guide 90 to move the clincher guide 91 and the rotation shaft 91a. The stapler unit 5 is moved smoothly so that it can be moved smoothly. In this embodiment, the rear end fence 27 is made of a high-strength resin material containing 20% PPE (polyphenylene ether resin) glass fiber.
FIG. 9 is a perspective view showing a driving mechanism of the discharge claw 11, and FIG. 10 is an enlarged perspective view of the main part showing the main part of FIG.

  When the motor pulley 100 is driven in FIG. 9, the drive is transmitted to the drive pulley 102 fixed to the drive shaft 103 via the timing belt 101. Further, a pulley 104 is fixed on the opposite side of the drive shaft 103, and the drive is transmitted to the discharge drive pulley 104. The discharge idler pulley 105 is supported by a housing (not shown) via a bracket 110 and a bearing 111 so as to be free to a rotating shaft 63a for fixing the rear end fence 27. The rotation of the rear end fence 27 and the discharge idler pulley 105 is supported. The shaft is configured to be coaxial. The discharge tightner pulley 106 is tensioned to the discharge belt 14 wound around the discharge drive pulley 104, the discharge idler pulley 105, and the discharge tightener pulley 106 by a pressure mechanism (not shown). Further, as shown in FIG. 1, a discharge claw 11 is fixed to the discharge belt 14, and the bundle of sheets after the end binding is conveyed above the staple tray 10 and discharged to the discharge tray 17 by the discharge roller 15. .

  FIG. 11 is a diagram illustrating the binding position (one side of the two-point binding) of the stapler unit 5 with respect to the minimum size paper in the present embodiment. At the time of binding processing, the needle clinching surface 5c of the clincher portion 5b protrudes to the driver portion 5a, but the width of the rear end fence 27 in the direction perpendicular to the paper conveyance direction is a width that does not contact the needle clinching surface 5c. Accordingly, it is not necessary to retract the rear end fence 27 even at the binding position at the minimum size. Further, as shown in FIG. 11, convex portions 27 a are provided at both ends of the sheet abutting surface of the rear end fence 27 so that the sheet bundle can be reliably abutted with the width of the rear end fence 27. Yes.

  12 and 13 are side views showing the positional relationship between the stapler unit 5 and the paper width direction. FIG. 12 shows a state in which the driver unit 5a of the stapler unit 5 is located at the center of the sheet width direction (direction orthogonal to the sheet conveyance direction). When paper is brought into contact with and aligned with the trailing edge fence 27 in the staple tray 10 and then the trailing edge fence 27 is retracted by a mechanism (not shown) and the sheet bundle is conveyed to the saddle stitching position, the stapler 5 is moved to the position shown in FIG. By moving the sheet bundle, the sheet bundle is conveyed from the staple tray 10 through the conveyance guide 90 to the driver side guide plate 92. Further, taper portions 92a are provided on both sides of the driver side guide plate 92 to smoothly guide the corner portions of the curled paper.

  FIG. 13 shows the binding position of the driver unit 5a of the stapler unit 5 in two places in the end binding process. At the time of end binding, after the paper is brought into contact with the rear end fence 27 and aligned, the discharge claw 11 fixed to the discharge belt 14 is moved upward in the drawing by driving the discharge belt 14 as described above. The sheet bundle is conveyed above the staple tray 10. At this time, if the discharge claw 11 and the conveyance guide 90 are in a position where they overlap, the discharge claw 11 will interfere with the conveyance guide 90, so that the conveyance guide 90 is located at the two-point binding position as shown in FIG. And a length that does not overlap (paper width direction). As a result, at the time of binding at two places, after the binding process at the second place is performed, the sheet bundle can be discharged without moving the stapler unit 5.

  As described above, according to the present embodiment, the following effects can be obtained.

1) Since the rear end fence 27 is thin, the retracting and projecting rotary shaft 63a and the drive mechanism are provided above the stapler unit 5 so that the stapler unit 5 can move even when the rear end fence 27 is in the projecting position. The processing time can be shortened.

2) Since the stapler unit 5 is allowed to move with the rear end fence 27 in the contact position, the binding process can be performed without holding the sheet bundle by another means at the end binding regardless of the binding position. .

3) Since the conveyance guide 90 is provided so that the stapler unit 5 can move in the paper width direction even when the rear end fence 27 protrudes, the rear end fence 27 is retracted in the two-point binding of the end binding process. Binding processing can be performed without any problem.

4) When the rear end fence 27 is in the sheet alignment position, the rear end fence 27 is moved to the protruding position by moving the stapler unit 5 while bringing the rear end fence guide 90 provided in the stapler unit 5 into contact with the rear end fence 27. Even in this case, the rear end fence 27 passes between the separation type binding means, and the stapler unit 5 can be moved.

5) Since the stapler unit 5 is provided with a member for scooping up the rear end fence 27 when the stapler unit 5 is moved, interference between the stapler unit 5 and the rear end fence 27 can be avoided.

6) Since the inclined portions 90a are provided on both sides of the rear end fence guide 90, the stapler unit 9 can smoothly move without interfering with the rear end fence 27 even when the rear end fence 27 is in the sheet alignment position. it can.

7) Since the opposing clincher guide 91 is rotatably installed when the rear end fence 27 is in the sheet alignment position, the clincher guide 91 is not affected even when the rear end fence 27 is pressed by the driver portion 5a of the stapler unit 5. Is retracted, the stapler unit 5 can be moved smoothly.

8) Since the rear end fence 27 is formed of a glass fiber-containing resin material, stable alignment accuracy can be obtained without the abutting member being deformed by a load due to the weight of the paper at the time of alignment.

9) The width of the trailing edge fence 27 in the direction orthogonal to the sheet conveyance direction is set to a width that does not interfere with the binding operation of the stapler unit 5 when binding the minimum size sheet, thereby holding the sheet bundle by another means. The binding process can be performed without any problem.

10) If the paper abutting surface of the rear end fence 27 is made flat, the paper cannot be supported on the entire surface of the rear end fence 27 due to deformation of parts, etc., and the paper abutment becomes incomplete and the alignment becomes worse. However, since the convex portions 27a are provided at both ends of the width of the paper abutting surface of the rear end fence 27 in the direction perpendicular to the paper conveyance direction, the paper is reliably abutted and aligned with the width of the rear end fence 27. Can do.

11) An inexpensive and space-saving device by coaxially rotating the rotating shaft 63a for abutting and retracting the rear end fence 27 and the discharge idler pulley 105 which is a part of the driving means for discharging the sheet bundle at the end binding. It can be.

12) Since the rear end fence 27 and the rotary shaft 63a rotate integrally, it is possible to pressurize the rotary shaft at the abutting position of the rear end fence 27, thereby efficiently pressing the rear end fence 27. Can be made.

13) Since the inclined portion 90a for guiding the rear end fence 27 when the stapler unit 5 is moved in a state where the rear end fence 27 protrudes is provided in the transport guide 90, the stapler unit 5 can be moved smoothly.

14) By forming the conveyance guide and the sheet abutting member guide part as a single component, it also serves as a guide from the staple tray to the conveyance guide and the sheet abutting member when moving the stapler without increasing the cost. Can do.

15) Since the conveyance guide 90 is protruded from the upper surface (stapler table surface) of the driver unit 5a, the trailing edge fence 27 and the conveyance guide 90 are slid when the stapler unit 5 is moved, It is possible to prevent the rear end fence 27 from coming into contact.

16) The length of the conveyance guide 90 in the sheet width direction is set to a length that does not interfere with the discharge claw 11 that discharges the bundle of sheets at the second stapler position by the two-point binding in the end binding process. The sheet bundle can be discharged without reducing the processing time due to the movement of the stapler unit 5.

1 is a diagram illustrating a system configuration of a system including an image forming apparatus and a sheet processing apparatus according to an embodiment of the present invention. It is a perspective view which shows the moving mechanism of a staple unit and a staple unit. It is a top view of a stapler unit. FIG. 4 is a front view of FIG. 3. It is a perspective view for demonstrating the pressure release mechanism of a bundle conveyance roller pair, and the retracting mechanism of a rear-end fence. It is a figure which shows the contact position (paper alignment position) and evacuation position of a rear-end fence. It is a figure which shows the relationship between a staple unit and a rear end fence when a rear end fence retracts | saves. It is a figure which shows the operation | movement which the stapler unit scoops up a rear end fence and moves the stapler unit 5, contacting a rear end fence and a rear end fence guide. It is a perspective view which shows the drive mechanism of a discharge nail | claw. It is a principal part expansion perspective view which expands and shows the principal part of FIG. FIG. 5 is a diagram illustrating a binding position of a stapler unit with respect to a minimum size sheet in the present embodiment. FIG. 6 is a side view showing a positional relationship (center) between the stapler unit and the paper width direction. FIG. 6 is a side view showing a positional relationship between the stapler unit and the sheet width direction (one of two-point binding).

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Stapler unit 5a Driver part 5b Clincher part 11 Release claw 27 Rear end fence 27a Protrusion part 63a Rotating shaft 90 Conveyance guide, rear end fence guide 90a Taber part 91 Clincher guide 105 Release idler pulley FR Sheet processing apparatus PR Image forming apparatus

Claims (14)

In a sheet processing apparatus having an abutting unit that abuts and aligns an end portion of a sheet-shaped recording medium that is carried in, and a binding unit that binds a sheet bundle aligned by the abutting unit.
A support shaft that swingably supports the abutting means is located above the binding means, and a portion of the abutting means that is located below the support shaft is formed in a shape that does not hinder the movement of the binding means. ,
An abutting guide facing the abutting means when the abutting means is in the alignment position is rotatably installed on the binding means,
It said abutment when unit is in a consistent position, the sheet processing apparatus according to claim Rukoto moving the binding unit while in contact with the said abutment means a portion of the binding unit. In a sheet processing apparatus having an abutting unit that abuts and aligns an end portion of a sheet-shaped recording medium that is carried in, and a binding unit that binds a sheet bundle aligned by the abutting unit.
Means for allowing movement of the binding means in a state where the abutting means is located at the alignment position ;
An abutting guide facing the abutting means when the abutting means is in the alignment position is rotatably installed on the binding means,
It said abutment when unit is in a consistent position, the sheet processing apparatus according to claim Rukoto moving the binding unit while in contact with the said abutment means a portion of the binding unit. In a sheet processing apparatus having an abutting unit that abuts and aligns an end portion of a sheet-shaped recording medium that is carried in, and a binding unit that binds a sheet bundle aligned by the abutting unit.
When the sheet-like recording medium is stacked on the binding processing tray, the sheet-like recording medium is transferred from the binding processing tray to the rear end fence guide and brought into contact with the abutting means, and the abutting means is aligned. The binding means includes a sheet-like recording medium conveyance guide that allows the binding means to move in a direction perpendicular to the sheet conveyance direction.
An abutting guide facing the abutting means when the abutting means is in the alignment position is rotatably installed on the binding means,
It said abutment when unit is in a consistent position, the sheet processing apparatus according to claim Rukoto moving the binding unit while in contact with the said abutment means a portion of the binding unit. The sheet processing apparatus according to claim 1 , wherein the binding unit scoops up the abutting unit during movement . The sheet processing apparatus according to claim 4, wherein a portion of the binding unit that contacts the abutting unit includes a guide member having an inclined portion . The sheet processing apparatus according to any one of claims 1 to 5, characterized in that said abutment means are formed of a resin material including glass fibers. 6. The width dimension in a direction perpendicular to the sheet conveying direction of the abutting means is set to a width dimension that does not interfere when the binding means binds a sheet recording medium having a minimum size . the sheet processing apparatus according to any one. The sheet processing apparatus according to any one of claims 1 to 5, characterized in that it comprises a convex portion at both ends in the direction perpendicular to the sheet conveying direction of the abutment surface of the abutment means. A swinging shaft for performing a projecting operation in the direction of the sheet- shaped recording medium abutting position of the abutting means with which the sheet- shaped recording medium abuts and a retreating operation from the sheet-shaped recording medium abutting position, and a sheet during end binding the sheet processing apparatus according to any one of claims 1, wherein a portion of the driving means for releasing the bundle is provided coaxially 5. Swing shaft for performing the projecting operation in the direction of the sheet-like recording medium abutting position of the abutting means and the sheet-like recording medium and the retreating operation from the sheet-like recording medium abutting position. DOO sheet processing apparatus according to any one of claims 1 to 5, characterized in that it works together. The sheet processing apparatus according to claim 3 , wherein an inclined portion that guides the abutting unit when the binding unit is moved when the abutting unit is in the alignment position is provided in the conveyance guide . The length of the conveyance guide in the direction orthogonal to the conveyance direction of the sheet-like recording medium is set to a length that does not interfere with the discharge member that emits the bundle of sheet-like recording media at the stapler position in the two-point binding in the end binding process. the sheet processing apparatus according to claim 3 or 11, wherein the are. 13. The sheet processing apparatus according to claim 3 , wherein a member that guides the conveyance guide and the abutting unit is formed as a single component. An image forming apparatus comprising the sheet processing apparatus according to claim 1 .

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