JP4787058B2 - Sheet processing apparatus, sheet post-processing apparatus, and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet processing apparatus that performs binding processing on a sheet, a sheet post-processing apparatus that sorts a transfer sheet of a sheet to be transferred arranged and output downstream, and performs processing such as punching and folding, and the sheet The present invention relates to an image forming apparatus such as a copying machine, a printer, or a facsimile apparatus that forms a toner image by an electrophotographic method provided with a post-processing apparatus.

A conventional sheet processing apparatus, an image forming post-processing apparatus including the sheet processing apparatus, and an image forming apparatus such as a copying machine, a printer, and a facsimile apparatus that form a toner image by an electrophotographic method. Disposed on the downstream side of the toner image forming unit of a sheet processing apparatus or a copier, printer, etc. that performs processing, sorts the transfer sheet of the transferred material of the output sheet, and automatically processes such as punching and folding Various types of post-processing apparatuses for image formation are widely known.
In recent years, with respect to the quality of each function, needs have been diversified and advanced, and in particular, the needs for alignment accuracy and alignment state of bound sheets have been extremely high. However, when the aligned sheet bundle is moved to the binding position, the sheet bundle is bent due to the weight of the sheet bundle, and the alignment state is disturbed. It was.
As countermeasures, the sheet tray alignment tray is dedicated to the number of sheets to be bound, the saddle stitch alignment tray and the end face alignment alignment tray are shared, and post-processing operations are accurate and stable. It has been proposed to perform the above (see, for example, Patent Documents 1 to 4).

Patent Document 1 discloses a configuration in which end-face binding and saddle-stitching with different maximum binding numbers are configured as independent units, and the saddle-stitching tray has a maximum stacking width to prevent sheet deflection and the like. ing. However, this not only makes the device complex or large, but also has a disadvantage in terms of cost.
Therefore, Patent Document 2 discloses that a saddle stitching alignment tray and an end face binding alignment tray are shared. In this case, since the stacking width needs to be adjusted for end face binding with a large number of sheets to be bound, the above-described problems cannot be solved.

Therefore, it has been proposed by the inventor of the same applicant to suppress the bending by using an alignment member in the sheet conveyance direction. However, in this case, a new problem can be considered as follows. For example, this alignment member has a relatively large conveying force because it pushes the sheet downward.
Since the sheet is pressed by this member, if the pressing force is too strong, the sheet bundle is changed and bent. In other words, it is very difficult to balance the conveying force required for sheet alignment and the resistance force when the sheet bundle is transferred to the binding position, and the stopped roller is rubbed. Is also expensive.
Therefore, as a countermeasure against the above-mentioned problem, a measure to add a sheet pressing member stored on the side of the staple tray can be considered, but since the mechanism of the staple tray is originally complicated, the apparatus becomes more complicated. This has the disadvantage of high costs.

Further, Patent Document 3 includes a sheet alignment tray that sequentially stacks and aligns sheets that are recording sheets on which images are recorded by the image forming apparatus, and a post-processing unit that performs post-processing such as saddle stitching on the sheet bundle. A recording paper post-processing device of an image forming apparatus, wherein a sheet bundle stacked and aligned on a sheet alignment tray is pressed by a pressing member attached to a jogger fence provided on the sheet alignment tray. When performing post-processing work such as saddle stitching, the post-processing work should be performed accurately and stably even if the sheet is bent or curled. It is also disclosed to do.
However, such a configuration complicates the configuration in the sheet aligning tray having a relatively small space and closes the space formed between the pair of jogger fences. In addition, the configuration of the jogger fence that performs the jogging operation to align the sheet bundle is complicated.

Therefore, the conventional sheet processing apparatus, and the image forming post-processing apparatus and the image forming apparatus provided with the sheet processing apparatus perform the binding process by moving the aligned sheet bundle to the binding position and performing the binding process. The bundle is bent due to its own weight or curl, and the alignment state is disturbed and it is difficult to accurately perform the binding process at a predetermined position. The bundle is contaminated due to excessive pressing force and the quality of the binding process is deteriorated. Not only that, the configuration is complicated and large, the jam removal performance is lowered, and the cost is increased. Therefore, a technique as disclosed in Patent Document 4 is disclosed.
Japanese Patent Application Laid-Open No. 07-2416 JP 2001-206629 A JP 2001-19268 A JP 2004-83261 A

However, even with the technique of Patent Document 4, if the presser is operated immediately after alignment in the conveyance direction of the sheet bundle, the sheet bounced in the vertical alignment is pressed in that state, resulting in sheet alignment failure. There is a bug. Specifically, the rear end of the sheet is abutted against the fence in order to align the sheets in the vertical direction.
However, when the abutting amount is large, the sheet is bent due to the abutting, and when this bending is eliminated, the sheet jumps. However, immediately after this, if the pressing means presses the sheet, the sheet cannot be returned to the original position, resulting in a problem of poor alignment.
In view of the above, the object of the present invention is to control the occurrence of bending of a bundle of aligned sheets and to easily perform binding processing at an accurate position, and is simple in configuration and small in size. Sheet processing apparatus capable of performing low-cost, high-quality and stable binding processing without degrading jam removal, and image forming sheet post-processing apparatus including the sheet processing apparatus and sheet post-processing An object of the present invention is to provide an image forming apparatus provided with the apparatus.

In order to solve the above-described problem, the invention described in claim 1 is a sheet processing apparatus that performs binding processing by aligning sheets that are carried in, and performs binding processing by aligning sheets that are loaded and stacked. A binding process tray, a conveyance direction alignment unit that aligns a sheet carried into the alignment binding process tray by performing a pendulum movement in the conveyance direction, and a binding process to a sheet bundle aligned by the conveyance direction alignment unit And a sheet bundle pressing unit that swings the sheet bundle bound by the binding processing unit from the standby position to the operating position and presses the sheet bundle from the thickness direction of the sheet bundle. transported to the matching binding processing tray, and the sheet bundle after a predetermined time set for each paper size after the alignment of the sheet conveyance direction is completed pressed manually Sheet processing apparatus characterized by operating the.

According to a second aspect of the present invention, there is provided a sheet post-processing apparatus that performs post-image formation processing on a loaded image transferred sheet, and a post-processing conveyance path that conveys the loaded image transferred sheet; , a sheet processing apparatus of claim 1, wherein performing the processing such as the side-stitching or saddle stitching aligned sheets is conveyed is conveyed by the post-treatment transport path, the image after the binding process by the sheet processing apparatus A sheet post-processing apparatus including a sheet discharge unit that discharges the sheet bundle of transferred sheets from the sheet processing apparatus.
The invention according to claim 3, characterized by sheet post-processing apparatus according to claim 2, wherein composed of the sheet processing apparatus folding device performs folding processing on a sheet bundle having been subjected to binding processing with.
According to a fourth aspect of the present invention, there is provided an image forming apparatus including the sheet post-processing apparatus according to the third aspect.

  According to the present invention, even if a jump occurs when the sheets are aligned in the vertical direction, it is possible to prevent misalignment by operating the pressing means over a period of time until the sheet returns, and the size can be prevented. The time loss can be minimized by optimizing the predetermined time every time.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall configuration diagram showing a sheet post-processing apparatus according to an embodiment of the present invention. The following explanation is based on the assumption that the image forming apparatus is also provided. The sheet post-processing apparatus is attached to a side portion of the image forming apparatus, and the sheet discharged from the image forming apparatus is guided to the sheet post-processing apparatus.
The sheet passes through a conveyance path A having post-processing means for performing post-processing on one sheet (in the embodiment, a punch unit as a punching means), and is conveyed to the upper tray 34 and to the shift tray 35. C, the branching claws 15 and the branching claws 16 are configured to be distributed to the conveyance path D that leads to the processing tray F that performs alignment, stapling, and the like.
Sheets that have been aligned and stapled in the processing tray F are distributed to the conveying path C leading to the shift tray 35 and the processing tray G to be folded by the branch guide plate 54 and the movable guide 55 that are deflection means. The sheet that has been configured and has been folded in the processing tray G passes through the conveyance path H and is guided to the lower tray 36.

  Further, a branching claw 17 is disposed in the conveyance path D, and is held in a state shown in the figure by a low-load spring (not shown). By rotating at least the conveying roller 9 among the discharge rollers 11, the trailing end is guided and retained in the sheet storage portion E, and can be conveyed while being overlapped with the next sheet. By repeating this operation, it is possible to convey two or more sheets in a superimposed manner.

A common conveying path A upstream of the conveying path B, the conveying path C, and the conveying path D is an inlet sensor 19 that detects a sheet received from the image forming apparatus, an inlet roller 1, a punch unit 29, and a conveying roller downstream thereof. 2, the branch claw 15 and the branch claw 16 are sequentially arranged.
The branch claw 15 and the branch claw 16 are held in the state shown in FIG. 1 by a spring (not shown). By turning on a solenoid (not shown), the branch claw 15 is turned upward and the branch claw 16 is turned downward. By doing so, the sheet is distributed to the conveyance path B, the conveyance path C, and the conveyance path D.
When the sheet is guided to the conveyance path B, the branch claw 15 is in the state of FIG. 1 and the solenoid is off. When the sheet is guided to the conveyance path C, the branch claw 15 is turned on by turning on the solenoid from the state of FIG. Is turned upward and the branch claw 16 is turned downward.
When the sheet is guided to the conveyance path D, the branching claw 16 is turned upward by turning off the solenoid in the state of FIG. 1, and the branching claw 15 is turned on by turning on the solenoid from the state of FIG.

FIG. 2 is a schematic perspective view showing the shift mechanism of the sheet stacking apparatus of the sheet post-processing apparatus according to the present invention. FIG. 3 is a schematic perspective view showing the lifting mechanism of the sheet stacking apparatus of the sheet post-processing apparatus according to the present invention.
The sheet stacking apparatus included in the sheet post-processing apparatus according to the present invention includes a shift sheet discharge roller 6, a return roller 13, a paper surface detection sensor 43, a shift tray 35, its lifting mechanism shown in FIG. 3, and the shift shown in FIG. It consists of a mechanism.
1 to 3, reference numeral 13 designates a sponge return roller for contacting the sheet discharged from the shift sheet discharge roller 6 and aligning the trailing end of the sheet against the end fence 32 (FIG. 2). Indicates. The return roller 13 is rotated by the rotational force of the shift paper discharge roller 6.
A tray lift limit switch 45 (FIG. 3) is provided in the vicinity of the return roller 13. When the shift tray 35 is lifted and pushes up the return roller 13, the tray lift limit switch 45 is turned on and the tray lift motor 48 is stopped. To do. As a result, overrun of the shift tray 35 is prevented.

As shown in FIG. 1, a paper surface detection sensor 43 is provided in the vicinity of the return roller 13 as paper surface position detecting means for detecting the paper surface position of the shift tray 35. Although not shown in FIG. 1, the paper surface detection sensor 43 includes the paper surface detection lever 30 shown in FIG. 3, a paper surface detection sensor (for staple) 43a, and a paper surface detection sensor (for non-stipple) 43b.
The paper surface detection lever 30 is provided so as to be rotatable about its shaft portion, and has a contact portion 30a that contacts the upper surface of the rear end of the sheets stacked on the shift tray 35 and a fan-shaped shielding portion 30b. The paper surface detection sensor (for stipple) 43a located above is mainly used for staple discharge control, and the paper surface detection sensor (for non-stipple) 43b is mainly used for shift discharge control.

In the present embodiment, the paper surface detection sensor (for stippling) 43a and the paper surface detection sensor (for non-stipple) 43b are turned on when being blocked by the shielding portion 30b.
Accordingly, when the shift tray 35 is raised and the contact portion 30a of the paper surface detection lever 30 is rotated upward, the paper surface detection sensor (for stippling) 43a is turned off, and when further rotated, the paper surface detection sensor (for non-stipple) 43b is turned on. To do.
When it is detected by the paper surface detection sensor (for stippling) 43a and the paper surface detection sensor (for non-stipple) 43b that the sheet stacking amount has reached a predetermined height, the shift tray 35 is lowered by a predetermined amount. Thereby, the paper surface position of the shift tray 35 is kept substantially constant.

In relation to the lifting mechanism of the shift tray 35, the shift tray 35 moves up and down as the drive shaft 21 is driven by the drive unit, as shown in FIG. A timing belt 23 is tensioned between the drive shaft 21 and the driven shaft 22 via a timing pulley.
The side plate 24 supporting the shift tray 35 is fixed to the timing belt 23, and the unit including the shift tray 35 is suspended so as to be lifted and lowered by such a configuration.
The power generated by a tray lifting / lowering motor 48 that can move forward and backward as a drive source for moving the shift tray 35 in the vertical direction is transmitted to the final gear of the gear train fixed to the drive shaft 21 via the worm gear 25. ing.
Since the worm gear 25 is interposed on the way, the shift tray 35 can be held at a fixed position, and an accidental drop accident of the shift tray 35 can be prevented.

A shielding plate 24a is integrally formed on the side plate 24 of the shift tray 35, and a fullness detection sensor 66 for detecting the full load of stacked sheets and a lower limit sensor 67 for detecting a lower limit position are disposed below the shielding plate 24a. The full detection sensor 66 and the lower limit sensor 67 are turned on / off by the plate 24a.
The fullness detection sensor 66 and the lower limit sensor 67 are photosensors, and are turned on when blocked by the shielding plate 24a. In FIG. 3, the shift paper discharge roller 6 is omitted.
As shown in FIG. 2, the swing (shift) mechanism of the shift tray 35 rotates the shift cam 31 using a shift motor 49 as a drive source. A pin stands on the shift cam 31 at a position away from the rotation shaft center by a certain amount.
This pin guides the rear end of the loaded paper on the shift tray 35 and is fitted to the elongated hole portion of the end fence 32 that is fitted in a direction orthogonal to the sheet discharge direction. Due to the rotation of the shift cam 31, the end fence 32 fitted with the pin moves in a direction orthogonal to the sheet discharge direction, and the shift tray 35 also moves accordingly.
The shift tray 35 stops at two positions, the front and back, and the stop position is detected by the shift sensor 44, and the stop operation of the shift tray 35 is performed by turning on / off the shift motor 49.

FIG. 4 is a schematic perspective view for explaining the periphery of the open / close guide plate. 1 and 4, as shown in FIG. 1, the shift paper discharge roller 6 has a drive roller 6a and a driven roller 6b, and the driven roller 6b is appropriately supported on the upstream side in the sheet discharge direction. And it is rotatably supported by the free end part of the opening-and-closing guide plate 33 provided rotatably in the up-down direction.
The driven roller 6b comes into contact with the driving roller 6a by its own weight or urging force, and the sheet is nipped between the rollers and discharged. When the bound sheet bundle is discharged, the open / close guide plate 33 is rotated upward and returned at a predetermined timing. This timing is determined based on a detection signal of the shift paper discharge sensor 26. Is done. The stop position is determined based on the detection signal of the paper discharge guide plate opening / closing sensor 68, and the opening / closing guide plate 33 is driven by the paper discharge guide plate opening / closing motor 50.

FIG. 5 is a plan view showing the configuration of the processing tray F for performing the stippling process in the positional relationship in the depth direction. FIG. 6 is a schematic perspective view showing the vicinity of the rear end fence together with a side view. FIG. 7 is a schematic perspective view showing the vicinity of the discharge belt.
The configuration of the processing tray F that performs the stippling process will be described in detail with reference to FIGS. 1 and 5 to 7. As shown in FIG. 6, the sheets guided by the staple paper discharge roller 11 are sequentially stacked on the processing tray F. In this case, alignment in the vertical direction (sheet conveyance direction) is performed with the tapping roller 12 for each sheet, and alignment in the horizontal direction (sheet width direction orthogonal to the sheet conveyance direction) is performed with the jogger fence 53.
The end-face stitching stapler S1 is driven by a staple signal from the control means 93 (FIG. 16) between job breaks, that is, between the last sheet of the sheet bundle and the first sheet bundle, and the binding process is performed. The sheet bundle subjected to the binding process is immediately sent to the shift paper discharge roller 6 by the discharge belt 52 having the discharge claw 52a, and is discharged to the shift tray 35 set at the receiving position.

As shown in FIG. 7, the release claw 52a is configured such that its home position is detected by a discharge belt HP sensor 38. The discharge belt HP sensor 38 is turned on by a discharge claw 52a provided on the discharge belt 52. / Turn off.
Two discharge claws 52 a and 52 a ′ are arranged at opposing positions on the outer periphery of the discharge belt 52, and the sheet bundle stored in the processing tray F is moved and conveyed alternately. Further, the sheet bundle accommodated in the processing tray F is reversely rotated as necessary, and the back surface of the discharge claw 52a and the discharge claw 52a 'on the opposite side waiting to move the sheet bundle from now on. The tips in the transport direction may be aligned.

Further, as shown in FIG. 5, the discharge belt 52 and its drive pulley 62 are arranged at the center of alignment in the sheet width direction on the drive shaft of the discharge belt 52 driven by the discharge motor 77. Further, the discharge roller 56 is disposed and fixed on the drive shaft symmetrically with respect to the alignment center in the sheet width direction, and the peripheral speed of the discharge roller 56 is set to be faster than the peripheral speed of the discharge belt 52.
As shown in FIG. 6, the tapping roller 12 is given a pendulum motion by a tapping solenoid 79 around the fulcrum 12 a and intermittently acts on the sheet fed to the processing tray F to hit the sheet against the rear end fence 51. . The hitting roller 12 rotates counterclockwise. The jogger fence 53 is driven via a timing belt by a jogger motor 70 capable of forward and reverse rotation, and reciprocates in the sheet width direction.

FIG. 8 is a schematic perspective view showing the vicinity of the end-face stitching stapler S1. FIG. 9 is an enlarged perspective view of the end-face stitching stapler S1 of FIG.
As shown in FIG. 8, the end surface binding stapler S <b> 1 is driven via a timing belt 84 a by a forward / reversely movable stapler moving motor 84 and moves in the sheet width direction in order to bind a predetermined position of the sheet edge.
A stapler movement HP sensor 85 that detects the home position of the end-face stitching stapler S1 is provided at one end of the movement range, and the binding position in the sheet width direction is the amount of movement of the end-face stitching stapler S1 from the home position. Controlled by
In the saddle stitching stapler S2, as shown in FIGS. 1 and 5, the distance from the rear end fence 51 to the needle striking position of the saddle stitching stapler S2 corresponds to half of the conveyance direction length of the maximum sheet size that can be saddle stitched. Two are arranged so as to be more than the distance, and two are arranged symmetrically with respect to the alignment center in the sheet width direction, and they are fixed to the stay 63 by an appropriate method.

FIG. 10 is a schematic diagram for explaining the sheet bundle deflecting means. FIG. 11 is a schematic diagram for explaining a first operation state of the sheet bundle deflecting means of FIG. FIG. 12 is a schematic diagram for explaining a second operation state of the sheet bundle deflecting means of FIG.
The configuration of the branch guide plate 54 and the movable guide 55 as sheet bundle deflecting means will be described with reference to FIGS. As shown in FIG. 10, the branch guide plate 54 is provided so as to be rotatable in the vertical direction around a fulcrum 54a, and has a pressure roller 57 that is rotatable on the downstream side thereof. The pressure roller 57 is brought into pressure contact with the discharge roller 56 by a spring 58.
The position of the branch guide plate 54 is determined by contacting the cam surface 61 a of the cam 61 that rotates by obtaining a driving force from the bundle branch drive motor 78. The movable guide 55 is rotatably supported on the rotation shaft of the discharge roller 56, and the movable guide 55 is provided with a link arm 60 that is rotatably connected.
The link arm 60 is fitted with a shaft fixed to the side plate 64 (a, b) shown in FIG. 5 and a long hole portion 60a, whereby the rotation range of the movable guide 55 is restricted. Further, it is held at the position shown in FIG. Further, when the link arm 60 is pushed by the cam surface 61b of the cam 61 that rotates by obtaining a driving force from the bundle branching drive motor 78, the connected movable guide 55 rotates upward.

The cam 61 obtains its home position by detecting the bundle branch guide HP sensor 88 by the shielding portion 61c, and controls the stop position by the drive pulse of the bundle branch drive motor 78.
FIG. 10 shows the positional relationship between the branch guide plate 54 and the movable guide 55 when the cam 61 is at the home position. The guide surface 55 a of the movable guide 55 has a function of guiding the sheet in the path to the shift paper discharge roller 6. FIG. 11 shows that when the cam 61 rotates, the branch guide plate 54 rotates downward, and the pressure roller 57 presses the discharge roller 56.
In FIG. 12, when the cam 61 further rotates, the movable guide 55 rotates upward, and a path that leads from the processing tray F to the processing tray G in FIG. 1 is formed by the branch guide plate 54 and the movable guide 55. It is shown that.
In this embodiment, the branch guide plate 54 and the movable guide 55 are configured to be operated by a single drive motor. However, a separate drive motor is provided so that the movement timing, You may comprise so that a stop position can be controlled.

FIG. 13 is a schematic view illustrating the folding plate moving mechanism at the home position where the folding mechanism is completely retracted from the sheet bundle accommodation area of the processing tray G. FIG. 14 is a schematic view showing the moving mechanism of the folding plate at the position where the center of the sheet bundle of the processing tray G is pushed into the nip of the folding roller. FIG. 15 is a block diagram showing an overall control circuit of the sheet post-processing apparatus according to the present invention.
A moving mechanism of the folding plate 74 will be described with reference to FIGS. The folding plate 74 is supported by fitting elongated holes 74a to each of two shafts standing on the front and rear side plates. The shaft portion 74b of the folding plate 74 and the elongated hole portion 76b of the link arm 76 are fitted, and the folding plate 74 reciprocates left and right in FIG. 13 as the link arm 76 swings around the fulcrum 76a. .
The elongated hole portion 76c of the link arm 76 and the shaft portion 75b of the folding plate driving cam 75 are fitted, and the link arm 76 swings by the rotational movement of the folding plate driving cam 75.
The folding plate drive cam 75 is rotated in the direction of the arrow in FIG. The stop position is determined by the folding plate HP sensor 90 detecting both end portions of the half-moon shaped shielding portion 75a.

FIG. 13 shows the home position fully retracted from the sheet bundle accommodation area of the processing tray G. When the folding plate drive cam 75 is rotated in the direction of the arrow, the folding plate 74 moves in the direction of the arrow and protrudes into the sheet bundle accommodation area of the processing tray G.
FIG. 14 shows a position where the center of the sheet bundle of the processing tray G is pushed into the nip (FIG. 1) of the folding roller 81. When the folding plate driving cam 75 is rotated in the direction of the arrow, the folding plate 74 moves in the direction of the arrow and retracts from the sheet bundle accommodation area of the processing tray G.

With reference to FIG. 1, the sheet discharge mode in the present embodiment will be described. In the present embodiment, the sheet fed from the image forming apparatus to the sheet post-processing apparatus 14 through the entrance roller 1 takes the following discharge form according to the post-processing mode.
1) Non-stipple mode a: The paper is discharged to the upper tray 34 through the transport path A and the transport path B.
2) Non-stipple mode b: The paper is discharged to the shift tray 35 through the transport path A and the transport path C.
3) Sort, stack mode: The paper is discharged to the shift tray 35 through the transport path A and the transport path C. At that time, the sheets to be discharged are sorted by the shift tray 35 swinging in the direction orthogonal to the paper discharge direction at every section separation.
4) Stipple mode: alignment and binding are performed in the processing tray F through the transport path A and the transport path D, and the paper is discharged to the shift tray 35 through the transport path C.
5) Saddle binding bookbinding mode: alignment and center binding are performed on the processing tray F via the transport path A and transport path D, and further center folding is performed on the processing tray G, and the sheet is discharged to the lower tray 36 through the transport path H. The

The entire control circuit of the sheet post-processing apparatus according to the present invention shown in FIG. 15 will be further described. 1 to 7 and 15, the control means 94 is a microcomputer having a CPU 94, an I / O interface 95, etc., as shown in FIG. 15, and is a control panel (not shown) of the image forming apparatus main body. Signals from the switches and the sensors such as the paper surface detection sensor 43 (FIG. 1) are input to the CPU 94 via the I / O interface 95.
The CPU 94, based on the input signal, the tray lifting / lowering motor 48 for the shift tray 35 (FIG. 3), the discharge guide plate opening / closing motor 167 for opening / closing the opening / closing guide plate, and the shift motor 49 (FIG. 3) for moving the shift tray 35. 2) Tapping roller motor for driving the tapping roller 12, each solenoid such as tapping solenoid 79, a conveying motor for driving each conveying roller, a discharging motor for driving each discharging roller, and a discharging motor 77 for driving the discharging belt 52 5) and the like are controlled.

Further, the CPU 94 moves the stapler moving motor 84 (FIG. 8) for moving the end-face stitching stapler S1, the oblique motor 86 (FIG. 9) for rotating the end-face stitching stapler S1 diagonally, and the jogger motor 70 (FIG. 6) for moving the jogger fence 53. ), A bundle branch drive motor 78 (FIG. 5) that rotates the branch guide plate 54 and the movable guide 55, and a bundle transport motor that drives a transport roller that transports the bundle are controlled.
Further, the CPU 94 controls driving of a rear end fence moving motor that moves the movable rear end fence 73, a folding plate driving motor that moves the folding plate 74, a folding roller driving motor that drives the folding roller 81, and the like. A pulse signal of a not-shown staple conveyance motor that drives the staple discharge roller is input to the CPU 94 and counted, and the hitting solenoid 79 and the jogger motor 70 are controlled according to this count.

FIG. 16 is a flowchart for explaining the operation in the non-stipple mode “a” in the discharge mode in which the paper is discharged to the upper tray through the transport path A and the transport path B. Referring to FIGS. 1 and 16, the sheet distributed from the conveyance path A by the branching claw 15 is guided to the conveyance path B and is discharged to the upper tray 34 by the conveyance roller 3 and the upper discharge roller 4. Further, the state of paper discharge is monitored by an upper paper discharge sensor 20 which is disposed in the vicinity of the upper paper discharge roller 4 and detects the discharge of the sheet.
If this is explained based on FIG. 16, rotation of each of the entrance roller 1, the transport roller 2, the transport roller 3 and the upper paper discharge roller 4 is started (S1). It is determined whether the inlet sensor 19 is on (S2). If it is on, it is determined whether the inlet sensor 19 is off (S3).
In step (S3), if it is off, it is determined whether or not the upper paper discharge sensor 20 is on (S4). If it is on, it is determined whether or not the upper paper discharge sensor 28 is off (S5). Next, it is determined whether or not it is the last sheet (S6). If it is the last sheet, the rollers are stopped after a predetermined time (S7).

FIG. 17 is a flowchart for explaining the operation in the non-stipple mode b of the discharge mode in which the paper is discharged to the upper tray through the transport path A and the transport path B. Referring to FIGS. 1 and 17, the sheet sorted from the conveyance path A by the branching claw 15 and the branching claw 16 is guided to the conveyance path C and discharged to the shift tray 35 by the conveyance roller 5 and the shift discharge roller 6. The Further, the state of paper discharge is monitored by a shift paper discharge sensor 26 which is arranged in the vicinity of the shift paper discharge roller 6 and detects the discharge of the sheet.
If this is described based on FIG. 17, rotation of each of the entrance roller 1, the transport roller 2, the transport roller 5, and the shift paper discharge roller 6 is started (S11). Switching of the branch claws 15 and 16 is turned on (S12). It is determined whether the inlet sensor 19 is on (S13). If it is on, it is determined whether the inlet sensor 19 is off (S14).
If it is determined in step (S14) to be off, it is determined whether or not the shift paper discharge sensor 26 is on (S15). If it is on, it is determined whether or not the shift paper discharge sensor 26 is off (S16). Next, it is determined whether or not it is the last sheet (S17). If it is the last sheet, the rollers are stopped after a predetermined time (S18), and the switching of the branch claws 15 and 16 is turned off (S19).

FIG. 18 is a flowchart for explaining operations in sorting and stacking modes of discharge forms discharged through the conveyance path A and the conveyance path B to the upper tray. With reference to FIGS. 1 and 18, the operations in the sort and stack modes will be described below. The same transport and discharge as in the non-stipple mode b is performed. At that time, the sheets to be discharged are sorted by the shift tray 35 swinging in the direction orthogonal to the paper discharge direction at every section separation.
If this is described based on FIG. 18, rotation of each of the entrance roller 1, the transport roller 2, the transport roller 5, and the shift paper discharge roller 6 is started (S21). Switching of the branch claws 15 and 16 is turned on (S22). It is determined whether the inlet sensor 19 is on (S23). If it is on, it is determined whether the inlet sensor 19 is off (S24).
If it is off in step (S24), it is determined whether or not the shift paper discharge sensor 26 is on (S25). If it is on, it is determined whether or not it is the first sheet of the copy (S26) and the shift motor 49 (FIG. 2) is turned on. (S27). It is determined whether the shift sensor 44 (FIG. 2) is on (S28), and the shift motor 49 is turned off (S29).
Next, it is determined whether or not the shift paper discharge sensor 26 is off (S30). If it is off, it is determined whether it is the final paper (S31). If it is the final paper, the rollers are stopped after a predetermined time (S32), and the switching of the branching claws 15, 16 is turned off (S33).

FIG. 19 is an enlarged schematic view showing the processing tray F for performing alignment, stapling, and the like and the processing tray G for folding and the like in FIG. FIG. 20 is a schematic diagram illustrating a first operation state of the processing tray F that performs the alignment, stapling, and the like illustrated in FIG. FIG. 21 is a schematic diagram illustrating a second operation state of the processing tray F that performs the alignment, stapling, and the like illustrated in FIG.
FIG. 22 is a schematic diagram illustrating a third operation state of the processing tray F that performs the alignment, stapling, and the like illustrated in FIG. FIG. 23 is a schematic diagram illustrating a fourth operation state of the processing tray F that performs the alignment, stapling, and the like of FIG.
FIG. 24 is a schematic diagram showing a first operation state of the processing tray G that performs folding and the like of FIG. FIG. 25 is a schematic diagram showing a second operation state of the processing tray G that performs folding and the like of FIG. FIG. 26 is a schematic diagram showing a third operation state of the processing tray G that performs folding and the like of FIG.

Referring to FIGS. 19 to 26, as described above, after the jogger fence 53 is moved outward by 1 mm, the sheet bundle is moved downstream by a predetermined distance set for each sheet size by the discharge claw 52a at the position shown in FIG. Is moved to the inside again by 1 mm, and the center thereof is bound by the saddle stitching stapler S2.
The bound sheet bundle is conveyed to a position shown in FIG. 22 by a discharge claw 52a downstream by a predetermined distance set for each sheet size, and temporarily stops. This moving distance is managed by the drive pulse of the discharge motor 77 (FIG. 7).
Thereafter, as shown in FIG. 22, the leading end of the sheet bundle is sandwiched between the discharge roller 56 and the pressure roller 57, and is formed by rotating the branch guide plate 54 and the movable guide 55 and is guided to the processing tray G. Is again conveyed downstream by the discharge claw 52a and the discharge roller 56. The discharge roller 56 is provided on the drive shaft of the discharge belt 52 and is driven in synchronization with the discharge belt 52.
Then, as shown in FIG. 23, the sheet bundle is moved in advance from the home position to a position corresponding to the sheet size by the upper bundle conveying roller 71 and the lower bundle conveying roller 72, and stopped to guide the lower end surface. It is conveyed to the movable rear end fence 73.
At this time, the discharge claw 52a stops at the position where another discharge claw 52a ′ disposed at a position facing the outer periphery of the discharge belt 52 reaches the vicinity of the rear end fence 51, and the branch guide plate 54 and the movable guide 55 returns to the home position and prepares for the next seat.

As shown in FIG. 24, the sheet bundle abutted against the movable rear end fence 73 is released from the pressurization of the lower bundle conveying roller 72. Thereafter, as shown in FIG. 25, the vicinity of the stapled portion is pushed by the folding plate 74 in a substantially right angle direction and guided to the nip of the opposing folding roller 81. The folding roller 81 that has been rotated in advance presses and conveys the sheet bundle, thereby folding the sheet bundle at the center.
As shown in FIG. 26, the folded sheet bundle is strengthened by the second folding roller 82 and discharged to the lower tray 36 by the lower paper discharge roller 83. At this time, when the trailing edge of the sheet bundle is detected by the folding portion passage sensor 41, the movable trailing edge fence 73 of the folding plate 74 returns to the home position, the pressurization of the lower bundle conveying roller 72 is restored, and the next sheet Prepare for. If the next job is the same sheet size and the same number of sheets, the movable rear end fence 73 may stand by at that position.

FIG. 27 is a schematic view showing the back side of the bracket of the hitting roller unit. FIG. 28 is a schematic perspective view showing the first operating state of the hitting roller unit of FIG. 27 from the front side of the bracket. FIG. 29 is a schematic perspective view showing the second operating state of the hitting roller unit of FIG. 27 from the front side of the bracket.
FIG. 30 is a schematic perspective view showing the third operating state of the hitting roller unit of FIG. 27 from the front side of the bracket. FIG. 31 is a schematic diagram showing a first relationship between the hitting roller and the jogger fence when the sheet enters the staple tray. FIG. 32 is a schematic view showing a first relationship between the hitting roller and the jogger fence when the sheet enters the staple tray.

The hitting roller unit will be described with reference to FIGS. The hitting roller 12 has a role as a conveyance direction alignment unit that aligns a sheet carried in the alignment binding processing tray F (FIG. 1) through the conveyance path D in the conveyance direction by performing a pendulum motion. .
Bearings 109 and 111 are fitted to the bracket 101. Further, bearings 108 and 110 are fitted to the hitting arm 103. When the drive shaft 102 passes through these bearings 108, 109, 110, and 111, the hitting arm 103 can swing with respect to the bracket 101.
Further, a drive pulley 112 is fitted to the drive shaft 102, and a driving force from another conveyance drive system can be transmitted from the pulley 112. Further, a shaft 104 is crimped on the hitting arm 103, and the hitting roller 12 is rotatably supported. A timing belt 113 is hung on the hitting roller 12 and the pulley 12a so that the power of the drive shaft 102 can be transmitted.

The hitting arm (return arm) 103 is normally stopped at the standby position shown in FIG. 28 by a spring (not shown), and the operation shown in FIG. 30 is performed via FIG. 29 by turning on the hitting solenoid 79 (FIG. 6). It will rotate to the position. At this time, the hitting roller 12 is rotated by the power transmission described above, and thereby the vertical alignment of the sheets is performed.
The swing arm 105 is fitted to the bosses of the bearings 109 and 111 and is rotatable with respect to the bracket 101. A shaft 106 is crimped on the swing arm 105, and a roller 107 is supported so as to be rotatable about the shaft.
As with the hitting arm 103, the swing arm 105 is normally stopped at a standby position shown in FIG. 28 by a spring (not shown), and when the hitting solenoid 79 (FIG. 6) is turned on, the operating position shown in FIG. Will be rotated.

By doing so, even if the sheets are stacked on the staple tray F and greatly bent as shown in FIG. 31, the bending can be suppressed as shown in FIG. 32 to change to a normal stack state. Further, this operating position is a position away from the stack surface by a predetermined distance as shown in FIG. 32 by a regulating member (not shown).
This distance should be slightly larger than the maximum number of sheets to be stacked (number of sheets to be bound). Originally, the gap is aimed at in this way, but if the gap is too large, the pressing effect is reduced. On the other hand, if a small gap is aimed, the gap may disappear due to variations between machines or differences in sheet thickness.
In such a case, the possibility of occurrence of the above-described problem is increased. In addition, if the phenomenon of defects is observed for each sheet size, the smaller the sheet, the higher the amount of jumping up, and it takes time to recover to the original position by free fall.

Next, the operation in the above-described 4) stipple mode will be described below. In FIG. 1, the sheet sorted by the branching claw 15 and the branching claw 16 from the conveyance path A is guided to the conveyance path D, and is discharged to the processing tray F by the conveyance roller 7, the conveyance roller 9, the conveyance roller 10, and the staple discharge roller 11. Is done. In the processing tray F, when the sheets sequentially discharged by the staple paper discharge roller 11 are aligned and reach a predetermined number, the end surface binding stapler S1 performs the binding process.
Thereafter, the bound sheet bundle is conveyed downstream by the discharge claw 52 a and discharged to the shift tray 35 by the shift discharge roller 6. Further, the state of paper discharge is monitored by a shift paper discharge sensor 26 which is disposed in the vicinity of the shift paper discharge roller 6 and detects the discharge of the sheet.

FIG. 33 is a flowchart for explaining the operation of the processing tray F in the stipple mode. 1, 6, 15, and 33, when the staple mode is selected, the jogger fence 53 moves from the home position and is discharged to the processing tray F as shown in FIG. 6. Wait at a standby position 7 mm away from the width. When the sheet is conveyed by the staple paper discharge roller 11 and the trailing edge of the sheet passes through the staple paper discharge sensor 28, the jogger fence 53 moves inward by 5 mm from the standby position and stops.
Further, the staple paper discharge sensor 28 detects the passage of the trailing edge of the sheet, and the signal is input to the CPU 94 (FIG. 16). The CPU 94 counts the number of oscillating pulses from a stipple transport motor (not shown) that drives the stipple paper discharge roller 11 from the time of receiving this signal, and turns on the hitting solenoid 79 after a predetermined pulse is oscillated.
The tapping roller 12 performs a pendulum motion by turning on / off the tapping solenoid 79. When the tapping roller 79 is on, the tapping roller 12 strikes the sheet to return downward, and abuts against the rear end fence 51 to perform paper alignment. At this time, every time a sheet stored in the processing tray F passes the entrance sensor 19 or the staple discharge sensor 28, the signal is input to the CPU 94, and the number of sheets is counted.

After a lapse of a predetermined time after the hitting solenoid 79 is turned off, the jogger fence 53 is further moved inward by 2.6 mm by the jogger motor 70, and is temporarily stopped to complete the horizontal alignment. The jogger fence 53 then moves outward by 7.6 mm, returns to the standby position, and waits for the next sheet. This operation is performed up to the last page.
After that, it moves again 7 mm inward and stops, and prepares for a stippling operation by pressing both side ends of the sheet bundle. Thereafter, after a predetermined time, the end face stitching stapler S1 is actuated by a staple motor (not shown), and the binding process is performed.
At this time, if two or more bindings are designated, the staple movement motor 84 (FIG. 8) is driven after the binding processing at one place is completed, and the end face binding stapler S1 is positioned at the proper position along the sheet rear end. And the second binding process is performed. If the third and subsequent locations are specified, this is repeated.

When the binding process is completed, the discharge motor 77 (FIG. 5) is driven, and the discharge belt 52 is driven. At this time, the paper discharge motor (not shown) is also driven, and the shift paper discharge roller 6 starts to rotate to accept the sheet bundle lifted by the discharge claw 52a.
At this time, the jogger fence 53 is controlled to be different depending on the sheet size and the number of sheets to be bound. For example, when the number of sheets to be bound is smaller than the set number or smaller than the set size, the sheet bundle is hooked by the discharge claw 52a while being conveyed by the jogger fence 53 and conveyed.
Then, the detection by the paper presence sensor 37 or the discharge belt HP (home position) sensor 38 causes the jogger fence 53 to retreat 2 mm after a predetermined pulse, and the restraint on the sheet by the jogger fence 53 is released. This predetermined pulse is set after the discharge claw 52a comes into contact with the rear end of the sheet and passes through the front end of the jogger fence 53.
When the number of sheets to be bound is larger than the set number or larger than the set size, the jogger fence 53 is retracted in advance by 2 mm and discharged. In any case, when the sheet bundle passes through the jogger fence 53, the jogger fence 53 moves further outward by 5 mm and returns to the standby position to prepare for the next sheet. The restraining force can be adjusted by the distance of the jogger fence 53 to the seat.

The operation of the processing tray F in the above-described stipple mode will be further described with reference to the flowchart of FIG. With reference to FIG. 1, FIG. 6, FIG. 15 and FIG. 33, rotation of each of the rollers such as the entrance roller 1 and the transport roller 2 is started (S41). Switching of the branch claw 15 is turned on (S42). The end face stitching stapler S1 is moved to the binding position after detecting its home position (S43).
Next, the discharge belt 52 is moved to the standby position after detecting its home position (S44). The jogger fence 53 is moved to the standby position after detecting its home position (S45). The branch guide plate 54 and the movable guide 55 are moved to the home position (S46).
Next, it is determined whether the inlet sensor 19 is on (S47). If it is on, it is determined whether the inlet sensor 19 is off (S48). If it is off, it is determined whether the staple paper discharge sensor 28 is on (S49). If it is ON, it is determined whether or not the staple paper discharge sensor 28 is OFF (S50).
If the staple paper discharge sensor 28 is off, the hitting roller 12 is turned on for a predetermined time (S51). The jogger fence 53 is moved inward by a predetermined amount, and then moved to the standby position (S52). Then, it is determined whether it is the last sheet of the copy (S53).
If it is the last sheet of the paper, the jogger fence 53 is moved inward by a predetermined amount (S54), the end face binding stapler S1 is turned on (S55), and the shift tray 35 is lowered by a predetermined amount (S56). The rotation of the shift paper discharge roller 6 is started (S57), and the discharge belt 52 is rotated by a predetermined amount (S58).

Next, it is determined whether the shift paper discharge sensor 26 is on (S59). If it is on, it is determined whether the shift paper discharge sensor 26 is off (S60). If it is off, the discharge belt 52 is moved to the standby position. (S61). Next, the jogger fence 53 is moved to the standby position (S62), the rotation of the shift paper discharge roller 6 is stopped after a predetermined time (S63), and the shift tray 35 is raised to the sheet receiving position (S64).
Thereafter, it is determined whether or not it is the final part of the job (S65), and if it is the final part, the end-face stitching stapler S1 is moved to its home position (S66), and the discharge belt 52 is moved to its home position (S67). 53 is moved to its home position (S68). Next, the rotation of the rollers such as the entrance roller 1 and the conveyance roller 2 is stopped (S69), the switching of the branching claw 15 is turned off (S70), and the operation is finished.
Next, in the above-described 5) saddle stitch binding mode, alignment and center binding are performed on the processing tray F through the transport path A and the transport path D, and further center folding is performed on the processing tray G. It is discharged to the lower tray 36.

In the processing tray F, the sheets sequentially discharged by the discharge rollers 11 are aligned in the same manner as in the 4) stipple mode, and the same operation is performed until just before the stipple (see FIG. 19). After that, first, the hitting solenoid 79 (FIG. 6) is turned on, and the roller 107 of the swing arm 105 is rotated to the operating position to prevent the sheet bundle from being bent.
The operation timing at this time is set to operate after a set time for each size, such as 100 ms for the large size (B4i or more) and 150 ms for the small size (A4 or less) after the hit solenoid 79 is off.
Then, the sheet bundle is conveyed downstream by a predetermined distance set for each sheet size by the discharge claw 52a to the position shown in FIG. 21, and the center thereof is bound by the saddle stitching stapler S2. The bound sheet bundle is conveyed to a position shown in FIG. 22 by a discharge claw 52a downstream by a predetermined distance set for each sheet size, and temporarily stops. This moving distance is managed by the drive pulse of the discharge motor 77 (FIG. 7).

Thereafter, as shown in FIG. 22, the leading end of the sheet bundle is sandwiched between the discharge roller 56 and the pressure roller 57 and is guided to the processing tray G formed by the rotation of the branch guide plate 54 and the movable guide 55. In order to pass through the path, the sheet is again conveyed downstream by the discharge claw 52 a and the discharge roller 56.
The discharge roller 56 is provided on the drive shaft of the discharge belt 52 and is driven in synchronization with the discharge belt 52. After the sheet bundle passes, the hitting solenoid 79 is turned off and the roller 107 is returned to the standby position.
Then, as shown in FIG. 23, the sheet bundle is moved from the home position to a position corresponding to the sheet size in advance by the upper bundle conveying roller 71 and the lower bundle conveying roller 72, and stopped to guide the lower end surface. It is conveyed to the movable rear end fence 73.
At this time, the discharge claw 52a stops at the position where the other discharge claw 52a ′ arranged at the position facing the outer periphery of the discharge belt 52 reaches the vicinity of the rear end fence 51, and the branch guide plate 54 and the movable guide 55 returns to the home position and prepares for the next seat.

As shown in FIG. 24, the sheet bundle abutted against the movable rear end fence 73 is released from the pressurization of the lower bundle conveying roller 72. Thereafter, as shown in FIG. 25, the vicinity of the stapled portion is pushed by the folding plate 74 in a substantially right angle direction and guided to the nip of the opposing folding roller 81. The folding roller 81 that has been rotated in advance presses and conveys the sheet bundle, thereby folding the sheet bundle at the center.
As shown in FIG. 26, the folded sheet bundle is strengthened by the second folding roller 82 and discharged to the lower tray 36 by the lower paper discharge roller 83. At this time, when the rear end of the sheet bundle is detected by the folding portion passage sensor 41, the folding plate 74 and the movable rear end fence 73 are returned to the home position, and the pressurization of the lower bundle conveying roller 72 is restored, so that the next sheet Prepare for. If the next job is the same sheet size and the same number of sheets, the movable rear end fence 73 may stand by at that position.

FIG. 34 is a flowchart for explaining the operation in the saddle stitch binding mode. The operation of the saddle stitch binding mode described above will be described below based on a flowchart. With reference to FIG. 1, FIG. 6, FIG. 15, FIG. 19 to FIG. 26, and FIG. 34, rotation of each roller such as the entrance roller 1 and the transport roller 2 is started (S71).
Switching of the branch claw 15 is turned on (S72). The discharge belt 52 moves to the standby position after detecting its home position (S73). The jogger fence 53 is moved to the standby position after detecting its home position (S74).
Next, the branch guide plate 54 and the movable guide 55 are moved to the home position (S75). Next, it is determined whether the inlet sensor 19 is on (S76). If it is on, it is determined whether the inlet sensor 19 is off (S77). If it is off, it is determined whether the staple paper discharge sensor 28 is on (S78). If it is ON, it is determined whether or not the staple paper discharge sensor 28 is OFF (S79).
If the staple paper discharge sensor 28 is off, the hitting roller 12 is turned on for a predetermined time (S80). The jogger fence 53 is moved inward by a predetermined amount, and then moved to the standby position (S81). Then, it is determined whether it is the last sheet of the copy (S82).
If the sheet is the final sheet, the roller 107 is rotated to the operating position after a predetermined time (S83). After the jogger fence 53 is moved inward by a predetermined amount (S84), the discharge belt 52 is rotated by a predetermined amount (S85). Next, the saddle stitch stapler S2 is turned on (S86), and the branch guide plate 54 and the movable guide 55 are displaced by a predetermined amount (S87).

Next, rotation of the upper bundle conveying roller 71 and the lower bundle conveying roller 72 is started (S88), and after detecting the home position of the movable rear end fence 73, it moves to the standby position (S89) and rotates the discharge belt 52 by a predetermined amount. (S90). Next, it is determined whether or not the bundle arrival sensor 39 is on (S91). If the bundle arrival sensor 39 is on, the rotation of the upper bundle conveying roller 71 and the lower bundle conveying roller 72 is stopped after conveying for a predetermined distance (S92).
Subsequently, the pressure under the bundle conveying roller 72 is released (S93), and the folding operation by the folding plate 74 is started (S94). The rotation of the folding roller 81, the folding roller 82, and the lower paper discharge roller 83 is started (S95). It is determined whether or not the folding portion passage sensor 41 is on (S96). If it is on, it is determined whether or not the folding portion passage sensor 41 is off (S97). If it is off, the lower bundle conveying roller 72 is pressurized (S98). ).

Next, the folding plate 74 is moved to the home position (S99), the branch guide plate 54 and the movable guide 55 are moved to the home position, and the roller 107 is rotated to the standby position (S100). It is determined whether or not the lower paper discharge sensor 42 is on (S101). If it is on, it is determined whether or not the lower paper discharge sensor 42 is off (S102). If it is off, the folding roller 81, the folding roller 82 and the lower paper discharge are detected. After the paper roller 83 is rotated for a predetermined time, the rotation is stopped (S103). The discharge belt 52 is moved to the standby position (S104).
The jogger fence 53 is moved to the standby position (S105), and then it is determined whether it is the final part of the job (S106). If it is the final part, the discharge belt 52 is moved to the home position (S107). Next, the jogger fence 53 is moved to the home position (S108), the rotation of each roller is stopped (S109), the switching of the branch claw 15 is turned off (S110), and the operation is finished.
FIG. 35 is a flowchart for explaining the operation for determining the predetermined time. The predetermined time described in FIG. 34 is determined as follows. Referring to FIG. 35, the sheet sizes A3 and A4 are determined (S111). For A3 and A4, the predetermined time is set to 100 ms (S112). If it is not A3 or A4, the predetermined time is set to 150 ms (S113).

1 is an overall configuration diagram illustrating a sheet post-processing apparatus according to an embodiment of the present invention. FIG. 3 is a schematic perspective view showing a shift mechanism of a sheet stacking device of the sheet post-processing apparatus according to the present invention. It is a schematic perspective view which shows the raising / lowering mechanism of the sheet | seat stacking apparatus of the sheet | seat post-processing apparatus concerning this invention. It is a schematic perspective view explaining the periphery of an opening / closing guide plate. It is a top view which shows the structure of the process tray F which performs a staple process by the positional relationship of a depth direction. It is a schematic perspective view which shows the rear end fence vicinity with a side view. It is a schematic perspective view which shows the discharge belt vicinity. It is a schematic perspective view which shows the end surface binding stapler S1 vicinity. It is an expansion perspective view of the end surface binding stapler S1 of FIG. It is the schematic explaining a sheet | seat bundle deflection | deviation means. It is the schematic explaining the 1st operation state of the sheet | seat bundle deflection | deviation means of FIG. It is the schematic explaining the 2nd operation state of the sheet | seat bundle deflection | deviation means of FIG. 6 is a schematic view showing a folding plate moving mechanism at a home position where the folding mechanism is completely retracted from the sheet bundle accommodation area of the processing tray G. FIG. FIG. 6 is a schematic view showing a folding plate moving mechanism at a position where a sheet bundle center of the processing tray G is pushed into a nip of a folding roller. It is a block diagram which shows the control circuit of the whole sheet | seat post-processing apparatus by this invention. It is a flowchart explaining the operation | movement in the non-stipple mode a of the discharge form discharged through the conveyance path A and the conveyance path B to an upper tray. It is a flowchart explaining the operation | movement in the nonstipple mode b of the discharge form discharged through the conveyance path A and the conveyance path B to an upper tray. It is a flowchart explaining the operation | movement in sort of the discharge form discharged to an upper tray through the conveyance path A and the conveyance path B, and a stack mode. It is the schematic which expands and shows the processing tray F which performs alignment, a staple binding, etc. of FIG. 1, and the processing tray G which performs a folding. It is the schematic which shows the 1st operation state of the process tray F which performs alignment, a staple binding, etc. of FIG. It is the schematic which shows the 2nd operation state of the process tray F which performs alignment, a staple binding, etc. of FIG. It is the schematic which shows the 3rd operation state of the process tray F which performs alignment, a staple binding, etc. of FIG. It is the schematic which shows the 4th operation state of the process tray F which performs alignment, a staple binding, etc. of FIG. It is the schematic which shows the 1st operation state of the processing tray G which performs folding etc. of FIG. It is the schematic which shows the 2nd operation state of the process tray G which performs folding etc. of FIG. It is the schematic which shows the 3rd operation state of the processing tray G which performs folding etc. of FIG. It is the schematic shown from the back side of the bracket of a hitting roller unit. It is a schematic perspective view which shows the 1st operation state of the hitting roller unit of FIG. 27 from the front side of a bracket. It is a schematic perspective view which shows the 2nd operation state of the hitting roller unit of FIG. 27 from the front side of a bracket. It is a schematic perspective view which shows the 3rd operation state of the hitting roller unit of FIG. 27 from the front side of a bracket. It is the schematic which shows the 1st relationship between a hitting roller and a jogger fence when a sheet | seat enters a staple tray. It is the schematic which shows the 1st relationship between a hitting roller and a jogger fence when a sheet | seat enters a staple tray. It is a flowchart explaining operation | movement of the process tray F at the time of a stipple mode. It is a flowchart explaining operation | movement of saddle stitch bookbinding mode. It is a flowchart explaining the operation | movement which determines predetermined time.

Explanation of symbols

  6 stapling paper discharge unit, 9 transport roller, 10 transport roller, 11 stapling paper discharge roller, 13 transport direction alignment means (return roller), 15 branching claw, 34 upper tray, 35 shift tray, 36 lower tray, 52 discharge mechanism ( Discharge belt), 52a discharge mechanism (release claw), 53 jogger fence, 54 branch guide plate, 55 movable guide, 73 rear end reference fence, 77 discharge mechanism (discharge motor), 107 sheet bundle pressing means (roller), D Conveying path (post-processing conveying path), F alignment binding processing tray (stipple processing tray), G stapling tray (saddle binding processing tray), S1 binding processing means (end face binding means), S2 binding processing means (center binding means)

Claims (4)

In a sheet processing apparatus that performs binding processing by aligning sheets that are carried in, an alignment binding processing tray that aligns the sheets that are loaded and stacked and performs binding processing, and in the alignment binding processing tray by performing a pendulum motion A conveying direction aligning unit that aligns the sheets carried into the conveying direction, a binding processing unit that performs a binding process on the sheet bundle aligned by the conveying direction aligning unit, and a sheet bundle that is bound by the binding processing unit A sheet bundle pressing means for swinging from the sheet bundle to the operating position and pressing from the thickness direction of the sheet bundle,
The final sheet of the sheet bundle is conveyed to the alignment binding processing tray, and the sheet bundle pressing unit is operated after a predetermined time set for each sheet size after alignment in the sheet conveyance direction is completed. A sheet processing apparatus. In a sheet post-processing apparatus that performs post-image formation processing on a transferred image-transferred sheet, a post-processing transfer path that transfers the transferred image-transferred sheet and a post-processing transfer path that is transferred and transferred 2. The sheet processing apparatus according to claim 1, wherein the sheets to be processed are subjected to processing such as end face binding or saddle stitching, and the sheet bundle of the image-transferred sheets after the binding processing by the sheet processing apparatus. A sheet post-processing apparatus comprising: a sheet discharging unit that discharges from the sheet . The sheet post-processing apparatus according to claim 2, further comprising a folding device that performs a folding process on the sheet bundle that has been bound by the sheet processing apparatus. An image forming apparatus comprising the sheet post-processing apparatus according to claim 3 .

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