JP5887864B2 - Paper processing apparatus and image forming system - Google Patents

Description

  The present invention relates to a sheet processing apparatus that performs a process such as saddle stitching, and an image forming system including the sheet processing apparatus.

  Conventionally, there are those disclosed in Patent Document 1, Patent Document 2, and the like as a hanging paper processing apparatus. The hanging-type paper processing apparatus stacks a plurality of sheets folded in a fold having a triangular cross section, and in this stacked state, the vicinity of the crease of the sheet is provided by a stapler provided near the top of the ridge. Saddle stitching is now planned.

  Patent Document 1 describes a configuration for accurately positioning a saddle stitching position.

  Patent Document 2 describes a configuration for realizing conveyance without occurrence of conveyance failure or wrinkle even when a large number of sheet bundles are conveyed.

JP 2010-241523 A JP 2006-36402 A

  By the way, a paper processing apparatus that performs saddle stitching with saddle stitching requires a complicated configuration of scissors to perform a number of processes such as stacking, aligning, saddle stitching, and transporting the folded sheets. is there.

  Here, when the saddle stitching operation and the conveying operation to the next processing unit are performed on the reed, it is necessary to lengthen the reed length, which requires a space, and the entire apparatus is large. There are drawbacks. On the other hand, in the configuration in which the booklet bundle that has been saddle-stitched is lifted and conveyed to the next processing unit after the saddle stitching is performed on the bag as in Patent Document 2, the booklet bundle is conveyed. This complicates the construction of the apparatus, and thus also complicates and enlarges the entire apparatus.

  Further, in a paper processing apparatus that is required to create a large amount of saddle-stitched booklet bundles, it is also required that the booklet bundles be created at high speed (in a short time) and the produced booklet bundles can be conveyed.

  The present invention has been made in consideration of the above points, and an object of the present invention is to provide a sheet processing apparatus that can perform saddle stitching and conveyance at high speed with a simple configuration.

According to one aspect of the paper processing apparatus of the present invention, a paper folded in half by a half-folding section is carried in, and a first bag on which the folded paper is placed and placed on the first bag. a stapler for saddle stitching the sheets were, said first saddle provided separately, comprising a second saddle is movable while placing the saddle-stitched sheet bundle, and the second The scissors are provided on the opposite side of the center folding portion with the first scissors in between .

  According to the present invention, since the saddle stitching and the conveyance are performed by being shared by the first and second collars, the saddle stitching and the conveyance can be performed at a high speed with a simple configuration. become.

FIG. 2 is a schematic plan view showing an overall configuration of an image forming system using the sheet processing apparatus according to the embodiment. Outline perspective view showing appearance configuration of image forming system The figure which shows the state of the paper conveyed in a 1st direction and a 2nd direction Side view showing configurations of conveyance mechanism and half-fold mechanism of common path Side view showing the state of the leading edge regulating member and the conveyor belt during paper positioning Side view showing the state of the urging member and the transport roller during paper positioning Side view showing the state of the transport mechanism and the center folding mechanism during center folding Side view showing a state in which the tip regulating member protrudes Side view showing a state in which the tip regulating member is retracted Diagram for explaining the paper discharge operation in the second direction The perspective view which shows the structure of a hook mechanism and a saddle stitch mechanism Side view showing the movement of the buffer wall Side view showing the movement of the buffer wall Top view for explaining the operation of the hook mechanism and saddle stitch mechanism Diagram showing the layout of the cutting unit The perspective view which shows arrangement | positioning of a cutting unit, a paper discharge stacking part, and a raising / lowering part Side view showing the arrangement of the cutting unit, the paper discharge stacking unit, and the lifting unit Side view for explanation of direction change part Side view for explanation of direction change part The perspective view with which it uses for description of the change of the holding position in a raising / lowering part The perspective view with which it uses for description of the change of the holding position in a raising / lowering part Diagram for explanation of square fold processing

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[1] Overall Configuration of System FIG. 1 is a schematic plan view showing the overall configuration of an image forming system in which the sheet processing apparatus of the present embodiment is used. FIG. 2 is a schematic perspective view showing an external configuration of the image forming system.

  As shown in FIG. 1, the image forming system 10 includes an image forming unit 20 and a paper processing unit 30.

  The image forming unit 20 forms an image composed of a toner image on a sheet, and is a so-called copying machine or a part called a printer. The image forming unit 20 includes, for example, a scanner, an exposure device, a photosensitive drum, a developing device, a fixing device, and the like, and forms a toner image on a sheet and discharges the sheet on which the toner image is formed. .

  The sheet processing unit 30 includes an overlapping unit 40, a first sheet processing unit 50, and a second sheet processing unit 100.

  The sheet processing unit 30 is configured to transfer the loaded paper (that is, the printed paper discharged from the image forming unit 20) in a first direction D1 that is the same direction as the paper loading direction and a first direction D1 orthogonal to the first direction D1. The conveyance can be performed while switching between the two directions D2.

  The first paper processing unit 50 is arranged in the first direction D1. The second paper processing unit 100 is arranged in the second direction D2. In addition, the second paper processing unit 100 is configured to include a common path that is a conveyance branch point K0 between the first paper processing unit 50 and the second paper processing unit 100. That is, the printed paper is carried into the first paper processing unit 50 through a part of the second paper processing unit 100.

  The first paper processing unit 50 performs processing other than half-folding on the paper. The first paper processing unit 50 is, for example, a paper discharge tray, a side stitch stapler, a hole punching machine, a case binding (gluing bookbinding) machine, and performs a large stacking process, a side binding process, a hole on a printed paper. Opening processing, case binding processing, etc. are performed. Note that the configuration of the first sheet processing unit 50 is not limited to the one that performs the above-described processing, and may be anything that performs processing other than half-folding.

  The second paper processing unit 100 performs processing including half-folding processing on the paper. FIG. 3 shows the state of the sheet 1 conveyed in the first direction D1 and the second direction D2. The sheet 1 conveyed in the first direction D1 is a sheet that is not folded in half, and the sheet 1 conveyed in the second direction D2 is a sheet that is folded in half. In the case of the present embodiment, the second sheet processing unit 100 sequentially performs a half-folding process, a saddle stitching process, a cutting process, and a stacking process on the sheet 1. The detailed configuration of the second paper processing unit 100 will be described later.

  The superimposing unit 40 superimposes a predetermined number of sheets and discharges the sheets in the direction indicated by the arrow in the drawing, that is, in the direction of the conveyance branch point K0 (which may be referred to as the direction of the second sheet processing unit 100). . As a result, the second sheet processing unit 100 folds, for example, five sheets overlapped by the overlapping unit 40 at once. Further, by providing the superimposing unit 40, even when the first paper processing unit 50 and the second paper processing unit 100 require time after the superposition, the printed paper is stocked in the superimposing unit 40. Therefore, it is not necessary to stop the processing of the image forming unit 20 on the preceding stage, and a decrease in productivity can be suppressed.

[2] Configuration of Second Paper Processing Unit [2-1] Common Route Conveyance Mechanism and Folding Mechanism Here, among the second paper processing unit 100, the common route conveyance including the branch point K0 of FIG. The mechanism and the center folding mechanism will be described in detail.

  FIG. 4 is a diagram illustrating a configuration of a common path conveyance mechanism and a center folding mechanism. FIG. 4 is a side view of the second paper processing unit 100 viewed from the side along the arrow D1 in FIG. That is, the overlapping unit 40 is disposed on the right side of FIG. 4, the first sheet processing unit 50 is disposed on the left side, and the front side of the sheet is the second direction D2.

  4 is roughly divided into a paper carry-in unit 110, a paper carry-out unit 120, and a half-fold unit 130.

  The paper carry-in unit 110 has transport rollers 111 that are paired up and down. The paper is nipped between the transport rollers 111 and is transported in the first direction D1 by the rotational force of the transport rollers 111. The transport roller 111 is driven by the drive gear 112.

  The paper carry-in unit 110 has a biasing member 113. The urging member 113 is fixed to the surface of the timing belt 115 suspended from the drive pulley 114, and can be moved together with the timing belt 115 in the clockwise and counterclockwise directions in the figure.

  The paper carry-out unit 120 has a conveyance belt 121 that is paired up and down. The sheet is sandwiched between the upper and lower transport belts 121 and is transported in the first direction D1 by the rotational force of the transport belt 121. Incidentally, a plurality of conveyor belts 121 are arranged in parallel in the direction orthogonal to the paper surface with a predetermined interval (see FIG. 10 for the arrangement of the conveyor rollers 111 and the conveyor belt 121).

  Further, the paper carry-out unit 120 has a leading end regulating member 122. The leading edge regulating member 122 abuts on the leading edge of the paper and regulates the leading edge position of the paper. Further, the tip regulating member 122 can appear and disappear in the transport path. Incidentally, in FIG. 4, the state which the front-end | tip regulation member 122 evacuated from the conveyance path | route is shown. Furthermore, the leading end regulating member 122 can move in the first direction D1 or in the opposite direction depending on the size of the paper that is carried in.

  The middle folding unit 130 includes two nip rollers 131 and a thin plate-like folding knife 132 that pushes a sheet into the nip rollers 131. The rotation axis of the nip roller 131 is parallel to the rotation axes of the transport roller 111 and the drive gear 112. Thereby, both the conveyance roller 111 and the nip roller 131 can be driven by the drive gear 112. As described above, the second sheet processing unit 100 is configured to include a common conveyance path that is a branch point between the conveyance path in the first direction D1 and the conveyance path in the second direction D2, and the middle folding process is performed in common. Since it is carried out by the conveyance path, it becomes easy to share the sheet conveyance and the folding source. Note that the nip line of the nip roller 131 is orthogonal to the first direction D1. Specifically, the nip line is formed in a direction orthogonal to the paper surface.

A typical operation performed by the folding mechanism during conveyance is as follows.
(i) Paper loading operation
(ii) Media positioning operation
(iii) Folding operation
(iv) Paper discharge operation in the first direction D1
(v) Paper discharge operation in the second direction D2

Hereinafter, each operation will be described in detail.
(i) Paper carrying-in operation As shown in FIG. 4, the upper and lower transport rollers 111 are driven in a press-bonded state, and the upper and lower transport belts 121 are driven in a press-bonded state. The sheet is nipped between the upper and lower conveying rollers 111 and the upper and lower conveying belts 121 and conveyed in the first direction D1. This paper carry-in operation ends just before the paper center reaches the folding knife 132.

(ii) Sheet positioning operation The sheet positioning operation is performed as a pre-process when the half-folding process is performed. As shown in FIG. 5, the upper and lower conveying belts 121 are separated from each other, and the leading end regulating member 122 projects in front of the paper 1. Further, as shown in FIG. 6, the upper and lower transport rollers 111 are separated. Since the transport belt 121 and the transport roller 111 are thus separated, the sheet 1 is opened in the first direction D1. In this state, the timing belt 115 is rotated in the clockwise direction in the drawing by the driving pulley 114. As a result, the urging member 113 presses the rear end of the paper 1 to urge the front end of the paper 1 toward the front end regulating member 122. When the leading edge of the sheet 1 reaches the leading edge regulating member 122, the drive pulley 114 stops and the positioning of the sheet 1 is completed. Here, the protruding position of the tip regulating member 122 in the first direction D1 and the stop position of the urging member 113 (which may be referred to as the interval between the tip regulating member 122 and the urging member 113) are carried in. It is set according to the size of the paper 1. That is, the protruding position of the leading end regulating member 122 and the stop position of the urging member 113 are set based on the size of the sheet 1 so that the center of the sheet 1 is positioned at the position of the folding knife 132.

(iii) Middle folding operation FIG. 7 is a diagram showing a state during the middle folding operation. As shown in FIG. 7, the folding knife 132 moves upward with the upper and lower conveyor belts 121 and the upper and lower conveyor rollers 111 spaced apart (that is, with the sheet 1 opened), as in the paper positioning operation. . As a result, the sheet 1 is pushed into the nip roller 131. The nip roller 131 rotates until the sheet 1 protrudes upward from the nip position. As a result, a crease is formed on the sheet 1 by the pressure of the nip roller 131. Next, when the nip roller 131 rotates in the reverse direction, the sheet on which the crease is formed falls from the nip roller 131 and is returned to the conveyance path.

(iv) Paper discharge operation in the first direction D1 When the paper discharge operation in the first direction D1 is performed, the above-described paper positioning operation and half-folding operation are not performed, and the paper is discharged as in the paper carry-in operation. 1 is sandwiched between the upper and lower transport rollers 111 and the upper and lower transport belts 121 and transported in the first direction D1 and discharged. At this time, since the leading edge regulating member 122 cannot eject the sheet in the protruding state as shown in FIG. 8, as shown in FIG. 9, it retracts from the conveyance path and opens the conveyance path in the first direction D <b> 1. Yes.

(v) Sheet discharging operation in the second direction D2 The sheet 1 in which a fold is formed and returned to the transport path from the nip roller 131 is pushed out in the second direction D2 by the push-out claw 134 as shown in FIG. . The push-out claw 134 is fixed to the transport belt 133 and can move in the second direction D2 together with the transport belt 133. In other words, the sheet 1 folded in the second direction D2 is pushed out by moving the pushing claw 134 in the second direction D2 while contacting the side surface of the sheet 1 folded in the middle. Note that the paper pushing operation in the second direction D2 is performed in a state in which the upper and lower transport belts 121 and the upper and lower transport rollers 111 are separated (that is, the paper 1 is released) as in the paper positioning operation and the middle folding operation. Done).

[2-2] Latch and Saddle Stitching Mechanism FIG. 11 is a perspective view showing the configuration of the saddle stitching mechanism and the saddle stitching mechanism of the present embodiment. The hook and saddle stitching mechanism of the present embodiment includes a main hook (first hook) 140, a stapler 150, and a buffer hook (second hook) 160.

  The main bag 140 has a triangular cross section so that the folded paper can be stably placed. Into the main bag 140, the folded sheet 1 discharged from the above-described folding mechanism is carried. The main bag 140 places the folded sheet 1.

  The stapler 150 is provided above the main collar 140 and descends in the direction of the main collar 140 so that the paper placed on the main collar 140 is saddle-stitched. Note that the positions of the main rod 140 and the stapler 150 in the second direction D2 are fixed.

  The buffer bag 160 is provided separately from the main bag 140, and can be moved by placing a saddle-stitched sheet. The main bag 140 and the buffer bag 160 are arranged in series in the fold direction of the folded paper. The buffer rod 160 is provided on the opposite side of the center folding portion with the main rod 140 interposed therebetween, and can move in a direction away from the main rod 140 (direction D2) and an approaching direction (a direction opposite to the direction D2). It is said that.

  Specifically, the buffer rod 160 is pivotally supported by the slide shaft 161 and is moved by the drive belt 162 in the second direction D2 and in the opposite direction. The base 163 of the buffer rod 160 is pivotally supported by the slide shaft 164 and is moved by the drive belt 165 in the direction D3 orthogonal to the second direction D2 and in the opposite direction.

  The saddle stitching and saddle stitching mechanism also includes a conveying unit that conveys the sheet bundle placed on the main collar 140 in the direction of the buffer collar 160 on the main collar 140, and a sheet bundle conveyed by the conveying means. Positioning means for positioning the sheet bundle at the saddle stitching position by the stapler 150 is provided in contact with the leading end in the transport direction. In the present embodiment, a first conveying member 171 and a second conveying member 172 are provided as the conveying means, and a positioning member 173 is provided as the positioning means.

  As will be described in detail later, the first transport member 171 plays a role of transporting the sheets to be saddle stitched to the saddle stitch position by the stapler 150, and the second transport member 172 is a sheet bundle after the saddle stitching is finished. Is transported to a position on the buffer wall 160. The second conveying member 172 also functions to position the sheet bundle at the saddle stitch position by the stapler 150. That is, the second transport member 172 functions as both a transport unit and a positioning unit.

  The first transport member 171, the second transport member 172, and the positioning member 173 are movable in the second direction D2 and in the opposite direction, respectively.

  12 and 13 show the movement of the buffer wall 160. FIG. FIG. 12 shows a state in which the buffer rod 160 is closest to the main rod 140. In this state, saddle stitching is performed by the stapler 150. FIG. 13 shows a state in which the buffer rod 160 is farthest from the main rod 140 in the second direction D2. In the state shown in FIG. 13, the sheet bundle after saddle stitching is placed on the buffer rod 160. After the buffer rod 160 is in the most distant state in the second direction D2 from the main rod 140 as shown in FIG. 13, the buffer rod 160 is moved along the slide shaft 164 in the direction D3 (the front side in FIG. 13). The

  Next, operations of the hooking mechanism and the saddle stitching mechanism according to the present embodiment will be described with reference to FIG. FIG. 14 is a schematic diagram of the hook mechanism and the saddle stitch mechanism as viewed from above.

  First, as shown in FIG. 14A, the center-folded sheet 1 placed on the main bag 140 is regulated at the leading end position by the second conveying member 172, and the first stapling process is performed by the stapler 150. The At this time, the second transport member 172 functions as a positioning unit that positions the sheet bundle at the saddle stitching position by the stapler 150.

  Next, as illustrated in FIG. 14B, the paper 1 is moved in the second direction D <b> 2 by the rear end of the paper 1 being pushed by the first conveying member 171. At this time, the positioning member 173 is moved to the leading end side of the sheet 1, and the sheet 1 is positioned at the second staple position by the first conveying member 171 and the positioning member 173, and the second sheet is positioned at this position. Eye stapling is performed. When the second stapling process is performed, a part of the leading end side of the sheet 1 is placed on the buffer tub 160. Thus, when the stapler 150 is fixed and the sheet 1 is moved and the saddle stitching is performed, the loading of the sheet is shared not only by the main rod 140 but also by the buffer rod 160, so that the length of the main rod 140 is shortened. It becomes possible to do.

  As shown in the drawing, when the positioning of the first staple position is completed, the second conveying member 172 wraps around the rear end side of the sheet 1 while avoiding the main rod 140.

  Next, as shown in FIG. 14C, the booklet bundle 1 after the saddle stitching is moved in the direction of the buffer rod 160 with the rear end pushed by the second conveying member 172. At this time, the first transport member 171 retracts backward in order to receive the next sheet 1.

  Eventually, as shown in FIG. 14D, the sheet (booklet) 1 is brought into a state of being completely placed on the buffer rod 160 by the rear end being pushed by the second conveying member 172. At this time, the buffer tub 160 is in a state where the booklet 1 is placed and can be moved independently, and the main tub 140 can receive the next sheet 1.

  Next, as shown in FIG. 14E, the buffer basket 160 places the booklet 1 and conveys it to the next processing position. During this time, the next sheet 1 is placed on the main bag 140 and the saddle stitching process is started.

[2-3] Configuration of Cutting Unit, Paper Discharge Stacking Unit, and Lifting Unit As shown in FIG. 15, a cutting unit 180 is arranged in the direction D3 in which the buffer rod 160 moves. The cutting unit 180 has a cutting blade (not shown), and cuts an end of the saddle-stitched booklet on the side opposite to the saddle-stitched side.

  FIG. 16 shows the arrangement of the cutting unit, the paper discharge stacking unit, and the elevator. The cutting unit 180 is disposed at a lower position than the buffer rod 160. The paper discharge stacking unit 190 is disposed above the cutting unit 180. In the present embodiment, the paper discharge stacking unit 190 is provided on the upper surface of the second paper processing unit 100. The elevating unit 200 receives the saddle-stitched booklet from the buffer basket 160 and lowers the booklet to the cutting unit 180 while holding the booklet vertically, and raises the booklet from the cutting unit 180 to the paper discharge stacking unit 190.

  As described above, by disposing the paper discharge stacking unit 190 above the cutting unit 180, the user can easily take out the booklet. Moreover, the installation area of the apparatus can be reduced.

  As shown in FIGS. 17, 18, and 19, a direction changing unit 210 is provided at the entrance of the paper discharge stacking unit 190. The direction changing unit 210 is a clamp mechanism, and changes the direction of the booklet 1 held vertically by the elevating unit 200 substantially horizontally and places it on the paper discharge stacking unit 190.

  Here, as shown in FIGS. 20 and 21, the elevating unit 200 determines the position at which the booklet 1 is gripped by the first gripping position and the second gripping position below the first gripping position. It is supposed to change. The elevating unit 200 changes the position where the booklet 1 is gripped from the first gripping position to the second gripping position when the booklet 1 is lifted from the cutting unit 180 to the paper discharge stacking unit 190.

  In order to change the gripping position, a holding plate 220 is provided in the present embodiment.

  The operation will be described. First, as shown in FIG. 22, the elevating unit 200 performs the square folding process with the square folding member 230 as shown in FIG. 22 while holding the vicinity of the upper end (fold) of the booklet 1 as shown in FIG. 20. Is lowered to the cutting unit 180, and the cutting process is performed by the cutting blade 181 of the cutting unit 180. And the booklet 1 after cutting is raised. At this time, the holding plate 220 is in a vertical state as shown in FIG.

  When the elevating unit 200 rises to a certain position, the holding plate 220 is rotated to be in a horizontal state as shown in FIG. 21, and the booklet 1 is placed on the upper surface of the holding plate 220. Thus, in a state where the booklet 1 is held on the holding plate 220, the elevating unit 200 changes the gripping position to the second gripping position below the first gripping position.

  As described above, by gripping the vicinity of the upper end (fold) of the booklet 1 and closing the booklet 1 accurately, accurate square folding processing and cutting processing can be performed. In addition, by changing the gripping position to the second gripping position below the first gripping position, the direction changing unit 210 positioned above the cutting unit 180 can appropriately receive the booklet 1.

  As described above, according to the present embodiment, the folded paper 1 is carried in, the main bag 140 on which the folded sheet 1 is placed, and the paper 1 placed on the main bag 140. Is provided separately from the main stapler 140 and the buffer stapler 160 on which the saddle-stitched sheet bundle 1 can be placed and moved. The bag 140 can be handled and the transport of the sheet bundle 1 can be handled by the buffer 160. As a result, the hook mechanism that needs to perform both saddle stitching and conveyance of the paper can be realized with a simple configuration, and the processing speed can be increased.

  In addition, the stapler 150 and the member that receives the stapler 150 on the main rod 140 side during stapling are fixed in the second direction D2, and the sheet 1 is moved in the second direction D2 by the first conveying member 171 and the second conveying member 172. By setting the staple position, the stapler 150 and the member receiving the stapler 150 on the main rod 140 side at the time of stapling do not deviate and the needle can be bent accurately and stably. it can. As a result, the accuracy of saddle stitching is improved. Moreover, silence can also be improved.

  Further, when the saddle stitching operation by the stapler 150 is performed, the buffer rod 160 comes close to the main collar 140, and a part of the sheet on which the buffer collar 160 is saddle-stitched is placed. As a result, the entire apparatus can be reduced in size.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the above embodiment, and can be changed without departing from the gist thereof. The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Paper (booklet)
DESCRIPTION OF SYMBOLS 10 Image forming system 20 Image forming unit 30 Paper processing unit 40 Superposition part 50 1st paper processing part 100 2nd paper processing part 110 Paper carry-in unit 111 Conveyance roller 112 Drive gear 113 Energizing member 120 Paper carry-out unit 121 Conveyor belt 122 Tip regulating member 130 Middle folding unit 131 Nip roller 132 Folding knife 134 Extrusion claw 140 Main rod 150 Stapler 160 Buffer rod 171 First conveying member 172 Second conveying member 173 Positioning member 180 Cutting unit 190 Discharge stacking portion 200 Lifting portion 210 Direction Conversion part 220 Holding plate D1 1st direction D2 2nd direction K0 Conveyance branch point

Claims (8)

A first bag on which a sheet folded in half by the middle folding unit is loaded, and on which the folded sheet is placed;
A stapler for saddle stitching the paper placed on the first bag;
A second collar provided separately from the first collar and capable of placing and moving a saddle-stitched sheet bundle;
Equipped with,
The second scissors are provided on the opposite side of the center folding portion with the first scissors sandwiched between them.
Paper processing device. The second saddle is movable before SL in the direction of the direction and proximity away from the first saddle,
The sheet processing apparatus according to claim 1. The first ridge and the second ridge are arranged in series in the crease direction of the sheet folded in half.
The sheet processing apparatus according to claim 1 or 2. Conveying means for conveying the sheet bundle placed on the first ridge in the direction of the second ridge on the first ridge;
Positioning means for abutting the leading end of the sheet bundle conveyed by the conveying means in a conveying direction and positioning the sheet bundle at a saddle stitching position by the stapler;
The sheet processing apparatus according to any one of claims 1 to 3, further comprising: The second bag is
Place a part of the sheet to be saddle-stitched close to the first fold during the saddle stitching operation by the stapler,
After the saddle stitching operation by the stapler is finished, the entire saddle stitched sheet bundle is placed and moved.
The sheet processing apparatus according to any one of claims 1 to 4. The conveying means is
First conveying means for conveying a sheet to be saddle stitched to a saddle stitching position by the stapler;
A second transport means for transporting the sheet bundle after saddle stitching to a position on the second collar;
The sheet processing apparatus according to claim 4 , comprising: The second bag conveys the saddle stitched sheet bundle to the next process.
The sheet processing apparatus according to any one of claims 1 to 6. An image forming unit for forming an image on paper;
A sheet processing apparatus according to any one of claims 1 to 7,
An image forming system comprising:

Images