JP3986841B2 - Paper post-processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet post-processing apparatus that is provided in an image forming apparatus and has a sheet aligning mechanism that aligns a discharged sheet bundle in a vertical direction and a horizontal direction.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a sheet post-processing apparatus that is mounted on a paper discharge side of an image forming apparatus such as a printer or a copier and performs post-processing such as folding, sorting (sorting), and binding (stapling) on a sheet after image formation has been used. It has been. In such a sheet post-processing apparatus, a predetermined post-process is performed by performing a process of aligning the edges of a plurality of sheets for each job, a so-called alignment process.
[0003]
The sheet post-processing apparatus generally includes a discharge unit that discharges, for example, a sheet bundle subjected to staple post-processing to a paper discharge tray after performing alignment processing. The discharge portion includes a discharge portion (this is referred to as a first discharge portion) provided with an extrusion member that extrudes a sheet bundle that has undergone alignment processing and post-processing, and paper that has been subjected to alignment processing and post-processing with the extrusion member. There is also a discharge portion (this is referred to as a second discharge portion) in which a support member that supports the bundle is integrated. Further, a discharge part (this is referred to as a third discharge part) configured such that the push-out member and the support member are configured separately and are moved forward and backward at a predetermined timing is also realized.
[0004]
In any case, the pushing member moves to the discharge tray side (downstream side), thereby pushing out the sheet bundle to the discharge tray.
[0005]
[Problems to be solved by the invention]
However, in the conventional sheet post-processing apparatus, in the sheet post-processing apparatus having the first discharge unit, when a sheet bundle without waist is discharged to the discharge tray by the first discharge unit. There is a possibility that the sheet bundle is bent (curved) downward and the sheet bundle cannot be pushed out accurately.
[0006]
In the sheet post-processing apparatus having the second discharge portion, when the sheet bundle is pushed out to the paper discharge tray by the second discharge portion, the tip end portion of the support member in the second discharge portion is There is a possibility that a situation occurs in which the sheet bundle stuck on the sheet discharge tray hits and pushes out the sheet bundle.
[0007]
Further, in the paper post-processing apparatus having the third discharge portion, a mechanism for moving the push-out member back and forth and a mechanism for moving the support member back and forth are necessary. For this reason, a sheet bundle is discharged (extruded). The mechanism is complicated and expensive.
[0008]
The present invention has been made in view of the above, and is a sheet post-processing apparatus capable of reliably discharging a sheet bundle without bending (curving) even when the sheet bundle has no waist. It is a first object to provide
[0009]
In addition, the present invention can reliably discharge a sheet bundle without bending (curving) even when the sheet bundle has no waist, and can also remove the sheet bundle stacked on the paper discharge tray. A second object is to provide a sheet post-processing apparatus capable of improving the stack quality.
[0010]
Further, according to the present invention, a sheet bundle can be reliably discharged without being bent (curved) even when the sheet bundle has no waist, and the discharge means can be realized simply and inexpensively. It is a third object to provide a sheet post-processing apparatus capable of printing.
[0011]
[Means for Solving the Problems]
  Solve the above-mentioned issues,3In order to achieve the above object, a sheet post-processing apparatus according to the invention of claim 1 includes a discharge unit that discharges the sheet, an alignment tray that supports an upstream portion of the sheet discharged from the discharge unit, and an alignment tray on the alignment tray. Post-processing means for performing post-processing; and discharge means for discharging a sheet bundle post-processed by the post-processing means;A paper discharge tray for stacking a stack of paper discharged by the discharge means;A sheet post-processing apparatus havingThe discharge means includes an extrusion member that discharges the post-processed sheet bundle, and a support member that prevents the sheet bundle from being bent when the sheet bundle is discharged by the extrusion member. One end thereof is engaged with the push-out member and is provided so as to be rotatable only upward with respect to the stack surface of the paper discharge tray. When the paper bundle is not pushed out by the push-out member, the alignment is performed. While maintaining a state substantially parallel to the paper stacking surface of the tray, and when the other end of the support member comes into contact with the paper stack stacked on the paper discharge tray during the extrusion of the paper bundle by the push-out member Rotating upwardIt is characterized by.
[0012]
  According to the first aspect of the present invention, the discharge means includes the pushing member for discharging the post-processed paper bundle and the support member for preventing the paper bundle from being bent. Even when the sheet is pushed out (discharged) to the sheet discharge tray, the bending (curving) of the sheet bundle without waist is suppressed.According to the first aspect of the present invention, the supporting member in the discharging means maintains a state substantially parallel to the sheet stacking surface of the alignment tray when the sheet bundle is not pushed out by the pushing member, and the sheet by the pushing member. During the extrusion of the bundle, when the other end of the support member comes into contact with the sheet bundle stacked on the paper discharge tray, the other end of the support member is ejected. Even if a sheet bundle stacked on the tray is contacted, the sheet bundle is not pushed out.
[0013]
In order to achieve the second object, in the sheet post-processing apparatus according to the second aspect of the present invention, in the first aspect, the supporting member is formed so as to be able to advance and retreat integrally with the push-out member. Features.
[0014]
According to the second aspect of the present invention, since the support member is formed so as to be able to advance and retreat integrally with the push-out member, the discharge means can be a simple mechanism.
[0017]
  Claim3The sheet post-processing apparatus according to the present invention is as follows.1 or 2The support member is provided at a position below the sheet stacking surface of the alignment tray in the height direction.
[0018]
  This claim3According to the invention, since the supporting member is provided at a position lower in the height direction than the sheet stacking surface of the alignment tray, the sheet bundle pushed out by the pushing member is reliably discharged to the discharge tray. It becomes.
[0019]
  Furthermore, to achieve the first and second objects, the claims4The sheet post-processing apparatus according to the present invention is the first aspect.3In any one of the above, the shape of the downstream portion of the alignment tray is a guide shape for guiding the rear end of the sheet bundle discharged by the discharge unit downward.
[0020]
  This claim4According to this invention, the trailing end of the sheet bundle discharged by the discharge means is guided downward (on the sheet discharge tray side) along the downstream portion of the alignment tray, so that the sheet bundle is returned to the sheet discharge tray without backflowing. Can be discharged.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Exemplary embodiments of a sheet post-processing apparatus according to the present invention will be explained below in detail with reference to the accompanying drawings.
[0022]
1 and 2 are schematic configuration diagrams of the sheet post-processing apparatus according to the embodiment. 1 shows a state diagram when the through mode and the shift mode are selected, and FIG. 2 shows a state diagram when the staple mode is selected.
[0023]
1 and 2, the sheet post-processing apparatus 1 is roughly a sheet inlet having a pair of inlet rollers 2 for receiving sheets discharged from the image forming apparatus and a conveying sensor 3 in the conveying path as shown. Width direction of the paper loaded on the bottom plate 8 (corresponding to the “alignment tray” in the claims), a conveyance roller unit 4 to be described later, a conveyance switching unit for switching the conveyance path for each mode by the switching claw 5 An aligning unit 90 for aligning the sheets, a tactile roller unit 10 for aligning the sheet conveyance direction, a discharge tray 6 on which processed sheets are stacked, and a pair of discharge rollers for discharging the sheets to the discharge tray 6. 7, a stapler device 11 that binds the sheet bundle (corresponding to “post-processing means” in the claims), and a discharge unit 12 that discharges the stapled sheet bundle to the paper discharge tray 6 (“ Corresponding to "releasing means") Eteiru.
[0024]
The switching claw 5 is provided to branch the paper conveyance path into a non-processing mode (through mode), a sorting mode (shift mode) conveyance path A, and a staple mode conveyance path B. Reference numeral 5a is a conveyance path A switching surface, reference numeral 5b is a conveyance path B switching surface, and reference numeral 5c is a sheet pressing surface.
[0025]
The sheet sent to the sheet post-processing apparatus 1 is conveyed upward by the inlet roller pair 2 in the apparatus, passes through the conveyance sensor 3, and is conveyed to the conveyance roller unit 4. According to the position information (passage information) from the conveyance sensor 3, the sheet is branched into the conveyance path A for the non-processing mode (through mode) and the sorting mode (shift mode) or the conveyance path B for the staple mode by the switching claw 5. Then, post-processing based on the mode is performed.
[0026]
Next, the conveyance roller unit 4 and the switching claw 5 in FIGS. 1 and 2 will be described with reference to FIG.
[0027]
The conveyance roller unit 4 includes a conveyance roller in which two cylindrical rollers 4b are press-fitted on a drive shaft 4a, a cylindrical driven roller 4c disposed so as to contact the roller 4b, and a driven roller 4c. A shift roller gear 4e formed integrally with a rack roller for connecting the drive shaft 4a and the driven shaft 4d and moving the roller pair in the paper width direction. The shift drive source 4f and the motor 4m move the 4e laterally (moves in the paper width direction), and the sensor 4g detects the home position and the lateral movement amount.
[0028]
The transport roller unit 4 functions as a transport roller in the through mode, and has a function of shifting the paper while transporting in the shift mode or the staple mode.
[0029]
The switching claw 5 is disposed downstream of the conveyance roller unit 4, and includes a conveyance path A switching surface 5a for switching the paper conveyance path to the conveyance path A, a conveyance path B switching surface 5b for switching the conveyance path to the conveyance path B, And a sheet pressing surface 5c for pressing the sheet.
[0030]
In addition, a rotation fulcrum 5d serving as a rotation fulcrum of the switching claw 5 and a torsion coil spring (not shown) that urges the sheet in the direction of guiding the sheet to the conveyance path B using the rotation fulcrum 5d as a guide rod are provided at a portion facing the sheet pressing surface 5c. And a tension spring 5f that urges the sheet in the direction of guiding the sheet to the conveyance path A, that is, the direction of pressing the sheet. The paper contact surface of the switching claw 5 is in a smooth state with low friction so that the paper does not get caught.
[0031]
Next, the bottom plate 8 in FIGS. 1 and 2 will be described with reference to FIG. As shown in FIG. 4, the bottom plate 8 disposed below the conveying roller unit 4 has a slit-like groove 8 a through which the alignment unit 90 can come and go and an alignment reference for the trailing edge of the sheet when the alignment unit 10 performs alignment. A rear end reference 8b, a discharge claw 12a, which will be described later, reciprocate in the paper transport direction, and a guide rail 8c that serves as a guide, and a projection that serves as a pivot center of an arm that moves the discharge claw 12a (not shown) A boss, a rotary shaft 8d at both ends, and a gear 8f at one end are integrally formed. The gear 8f is provided with a motor 90m as a drive source via a gear train (not shown) and a gear 8g.
[0032]
The bottom plate 8 is configured to rotate in synchronism with the tatting operation of the tacho roller unit 10 and the aligning operation of the aligning unit 90, which will be described later, with the rotating shaft 8d as the rotation center by driving of the motor 90m.
[0033]
The aligning portion 90 is disposed in a state where the slit-like groove 8a formed in the bottom plate 8 is inserted so that the sheets stacked on the bottom plate 8 can be aligned, and is disposed downstream of the switching claw 5. Yes.
[0034]
FIG. 5 is an explanatory diagram showing a configuration of the matching unit 90 in FIGS. 1 and 2. As shown in FIG. 5, the alignment unit 90 includes a slide member 90b, a plurality of alignment members 90a that are inserted into the slide member 90b and turnable, a guide member 90f that guides the slide of the slide member 90b, and a slide member. A swing member 90d swinging on 90b, a compression spring 90c having one end locked to the slide member 90b and the other end locked to the swing member 90d, a cam 90e swinging the swing member 90d, It consists of
[0035]
When the cam 90e rotates, the swinging member 90d presses the compression spring 90c and the slide member 90b, so that the alignment member 90a presses the sheet. The aligning member 90a is folded by its own weight, and the sheet is retracted from the folded state when the sheet is retracted. The alignment member 90a has a guide shape for guiding the paper in the transport direction and the lateral direction (a direction perpendicular to the transport direction).
[0036]
In the alignment unit 90 described above, the second alignment after the first alignment (shift) by the transport roller unit 4 is performed. The operation of the two-stage alignment and matching unit 90 will be described later.
[0037]
In the present embodiment, the motor is used as a drive source for driving the bottom plate 8, but the present invention is not limited to this, and a solenoid may be used.
[0038]
FIG. 6 is an explanatory diagram showing the configuration of the tapping part 10 in FIGS. 1 and 2. As shown in FIG. 6, the tataki roller unit 10 is formed of a friction body (for example, a sponge roller) that has a substantially cylindrical shape and moves the sheet, and a return roller 10 a that aligns in the sheet conveyance direction. A rotary bracket 10c that rotatably supports the roller 10a and is rotatably attached to the central shaft 10b, a first belt 10d that is stretched through a first pulley that is formed integrally with the return roller 10a, and a first belt A second pulley 10e that transmits driving to the other end of the belt 10d, a second belt 10f that is stretched via the second pulley 10e, and a second shaft that rotates around the center shaft 10b at the other end of the second belt 10f. A third pulley 10g, a third belt 10h stretched via the third pulley 10g, a fourth pulley 10i press-fitted into the rotating shaft of the motor 10m at the other end of the third belt 10h, and a return roller 1 A motor 10m for driving 0a, a motor bracket 10j for mounting the motor 10m with a center shaft 10b fixed by caulking, and a tension spring 10k for biasing the return roller 10a in a direction to contact the paper. ing.
[0039]
Two of the tapping parts 10 are arranged above the bottom plate 8 in parallel with respect to the sheet discharge direction, and perform pendulum movement around the central axis 10b as the driving source (not shown) moves up and down. Then, the return roller 10a is brought into contact with or separated from the sheet to perform the tapping operation. Note that the paper alignment is performed only when the return roller 10a contacts the paper. In this embodiment, the return roller is used as the mechanism of the rotary roller unit 10. However, the present invention is not limited to this, and the same function can be realized by using, for example, a paddle (a rotating body having a radial cross section). .
[0040]
FIG. 7 is an explanatory diagram showing a configuration of the discharge section 12 in FIGS. 1 and 2. As shown in FIG. 7, the discharge unit 12 includes a discharge claw 12a (corresponding to the “push-out member” in the claims) that discharges the stapled paper bundle, and one end slidably connected to the discharge claw 12a. An arm 12b that is rotatably attached to a boss (not shown) whose other end projects from the bottom plate 8, and a torsion coil spring (not shown) that urges the discharge claw 12a in a direction to wait at the home position. A gear 12d integrally formed with a protruding member 12c that presses the arm 12b in the direction in which the sheet bundle is discharged, that is, the direction indicated by reference numeral E in FIG. 7, and a drive source (not shown) that drives the gear 12d; It consists of
[0041]
The lower abdomen of the discharge claw 12a has a support member 12e (corresponding to the “support member” in the claims) that is engaged with the discharge claw 12a to support the lower portion of the sheet bundle and is rotatable. is doing.
[0042]
FIG. 8 shows a paper discharge state when the rotatable support member 12e of the discharge portion 12 according to the present embodiment is used, and FIG. 9 shows the discharge portion provided with the rotatable support member 12e. It is explanatory drawing which shows the structure of 12.
[0043]
When the driving source (not shown) drives the gear 12d (see FIG. 7) in the direction of the arrow indicated by the symbol E, the discharging portion 12 presses the arm 12b so that the discharging claw 12a becomes the bottom plate. Eight guide rails 8c (see FIG. 4) are moved to discharge the sheet bundle. Further, when the drive source (not shown) is reversely rotated (the gear 12d is driven in the direction opposite to the arrow direction indicated by E), the drive source (not shown) is stopped by the biasing of the torsion coil spring ( (Home position).
[0044]
Further, the support member 12e has one end engaged with the discharge claw 12a, is rotated only upward with respect to the stack surface of the paper discharge tray 6, and can move forward and backward integrally with the discharge claw 12a. Is formed. Further, the support member 12 e is provided at a position below the sheet stacking surface of the bottom plate 8 in the height direction.
[0045]
The supporting member 12e maintains a state substantially parallel to the sheet stacking surface of the bottom plate 8 (alignment tray) when the sheet bundle is not pushed out by the discharge claw 12a, and during the pushing of the sheet bundle by the discharge claw 12a, When the other end of the support member 12e comes into contact with the sheet bundle stacked on the sheet discharge tray 6, the support member 12e rotates upward.
[0046]
In this embodiment, the support member 12e is provided in the discharge section 12 to prevent the sheet bundle from being bent (curved), for example, even if the sheet bundle has no waist. This is to ensure that Another reason is to improve the stack quality of the sheet bundle by preventing the leading end of the support member 12e from striking against the sheet bundle stacked (stacked) on the sheet discharge tray 6 when the sheet bundle is discharged.
[0047]
The downstream portion (downstream tip portion) of the bottom plate 8 is formed in a shape that guides the rear end of the sheet bundle discharged by the discharge portion 12 (discharge claw 12a) downward. That is, the downstream end portion of the bottom plate 8 is formed such that the surface of the downstream end portion and the surface in the vertical direction form a predetermined angle θ. In this way, the inclined surface having a predetermined angle θ is formed at the downstream end portion of the bottom plate 8 because the rear end of the sheet bundle moves along the downstream end portion of the bottom plate 8 and the sheet This is to make it easier for the bundle to fall onto the paper discharge tray 6.
[0048]
Here, a discharge part having no support member and a discharge part having a non-rotating (fixed) support member 12e will be described.
[0049]
FIG. 10 shows a discharge state (that is, a discharge state of the paper by the discharge claw 12a) when the paper bundle discharge process is performed by the discharge unit 12 that does not have a support member corresponding to the support member 12e, and FIG. It is explanatory drawing which shows the structure of the discharge | release part 12 in which the member 12e does not exist. In the discharge unit 12 shown in FIGS. 10 and 11, when discharging a sheet bundle without waist, the sheet bundle is bent (curved) downward as shown in FIG. There is a possibility that a situation may occur in which it is not possible to reliably push out.
[0050]
FIG. 12 shows a discharge state when the paper bundle discharge process is performed by the discharge unit 12 having a support member 12e ′ (corresponding to the support member 12e) that does not rotate, and FIG. 13 does not rotate (fixed) ) It is explanatory drawing which shows the structure of the discharge | release part 12 in which the supporting member 12e 'was provided. In the discharge portion 12 shown in FIGS. 12 and 13, the support member 12 e ′ does not rotate upward and is fixed. Therefore, when the sheet bundle is discharged, the support member 12 e ′ There is a possibility that the leading end of the support member 12e hits and the sheet bundle is pushed out.
[0051]
As described above, as the discharge unit 12 used in the paper post-processing apparatus 1, it is more preferable to employ the discharge unit 12 (see FIGS. 8 and 9) including the support member 12e that can rotate upward. Is preferable from the viewpoints of reliability and improvement of stack quality of paper.
[0052]
FIG. 14 is a perspective view of the bottom plate 8, the alignment portion 90, and the discharge portion 12 as viewed from obliquely below.
[0053]
Next, the staple mode operation in the sheet post-processing apparatus 1 configured as described above will be described in detail with reference to FIGS. 15 to 20 in addition to FIGS.
[0054]
When the staple mode is selected, the transport roller unit 4 stands by at a position corresponding to the size (shift amount) of the paper received after moving to the home position. The switching claw 5 stands by at a position where the conveyance path B is blocked, that is, a position where the sheet is guided to the conveyance path A (see FIG. 1).
[0055]
The bottom plate 8 stands by in a state where the sheet stacking surface is parallel to the horizontal direction. Further, the tapping roller unit 10 stands by at a position away from the bottom plate 8 so as not to interfere with the paper sliding on the paper stacking surface of the bottom plate 8 (see FIG. 2). Furthermore, the discharge part 12 stands by on the upstream side of the rear end reference 8b of the bottom plate 8 at a position that does not hinder the alignment by the rotary part 10.
[0056]
When each is in a paper receiving state, the paper conveyed from the image forming apparatus is received by the entrance roller pair 2. When the transport sensor 3 detects the leading edge of the paper, the switching claw 5 moves to a position for guiding the paper to the transport path B (state shown in FIG. 2).
[0057]
As shown in FIG. 15, after a while after the leading edge of the sheet conveyed on the center reference reaches the nip of the conveyance roller unit 4, the conveyance roller unit 4 moves the stapler while conveying the sheet as illustrated in FIG. 16. A lateral movement is performed toward the apparatus 11, and the first alignment is performed up to the vicinity of the side reference 8k. At this time, the aligning unit 90 is in a state in which the aligning member 90a at the position where the sheet passes over the aligning member 90a is folded and the other aligning members 90a can align the sheet.
[0058]
The first alignment is performed from the side reference 8k to a position of 2 mm for any paper size to be processed. When the first alignment is performed, the conveyance roller unit 4 continues the conveyance until the sheet is discharged to the bottom plate 8. When the sheet is discharged onto the bottom plate 8, as shown in FIG. 17, the switching claw 5 rotates in the direction of guiding to the transport path A and presses the trailing end of the sheet with the sheet pressing surface 5c. Further, as shown in FIG. 18, in this state, the remaining 2 mm of horizontal alignment (second alignment) is performed by the alignment unit 90. At this time, since the paper is pressed by the switching claw 5, the paper can be aligned without rotating (skewing) without pressing the center point of the side surface of the paper.
[0059]
When alignment in the sheet width direction is performed by the alignment unit 90, alignment in the sheet conveyance direction is performed by the tacho roller unit 10 as shown in FIG. That is, when the rotary roller unit 10 is rotated in the paper surface direction by a drive source (not shown), the return roller 10a comes into contact with the paper surface and alignment is performed up to the rear end reference 8b. At this time, the bottom plate 8 is rotated about the rotating shaft 8d as a fulcrum so that the sheet can be easily conveyed, thereby providing a slight gap.
[0060]
Note that the tapping operation by the tuck roller unit 10 is performed for a while even when the trailing edge of the sheet reaches the trailing edge reference 8b so that the sheet can be reliably aligned even if slip occurs between the return roller 10a and the sheet.
[0061]
Next, when the paper is aligned with the rear end reference 8b, as shown in FIG. 20, the opened bottom plate 8 is rotated to the home position, and the paper is sandwiched between the pressing members 20. Move (retract) to the position, and then finish the tapping operation.
[0062]
As described above, the paper is forcibly pressed by the pivoting operation of the bottom plate 8 to reduce the bending of the curled paper, so that the space (height) considering the curl amount is not required and the size is reduced. Is realized. Further, the next discharged paper does not push out the paper stacked on the bottom plate 8, and even if there is a step between the bottom plate 8 and the discharge tray 6 as in this embodiment. Since the paper does not slide down, it is not necessary to raise the paper discharge tray 6 to the bottom plate 8 each time.
[0063]
When the sheet is clamped by the pressing member 20, the switching claw 5 is raised to enter the next sheet receiving state. The series of operations described above are repeated until the last page is completed. When the last page is completed, the stapler device 11 performs stapling. Thereafter, the sheet bundle bound by the discharge unit 12 is discharged to the paper discharge tray 6.
[0064]
At the time of discharging the sheet bundle, when the end portion of the supporting member 12e comes into contact with the sheet bundle stacked on the sheet discharge tray 6 during the extrusion of the sheet bundle by the discharge claw 12a, the sheet bundle rotates upward.
[0065]
【The invention's effect】
  As described above, according to the first aspect of the present invention, the discharge means includes the push-out member that discharges the post-processed sheet bundle and the support member that prevents the sheet bundle from being bent. Therefore, even when a sheet bundle without waist is pushed out (discharged) to the paper discharge tray by the discharging means, the bending (curvature) of the sheet bundle without waist can be suppressed, and the sheet without waist The bundle can be discharged (extruded) to the paper discharge tray.According to the first aspect of the present invention, when the paper bundle is not pushed out by the pushing member, the supporting member in the discharge means is maintained substantially parallel to the paper stacking surface of the alignment tray, and the paper by the pushing member. During extrusion of the bundle, when the other end of the support member comes into contact with the sheet bundle stacked on the paper discharge tray, the other end of the support member is Even if a sheet bundle stacked on the sheet discharge tray comes into contact, the sheet bundle is not pushed out, and the stack quality of the sheet bundle on the sheet discharge tray can be improved.
[0066]
According to the second aspect of the present invention, since the supporting member is formed so as to be able to advance and retreat integrally with the pushing member, it can be a simple mechanism of the discharging means, thus realizing an inexpensive discharging means. Can do.
[0068]
  Claims3According to the invention, since the supporting member is provided at a position lower in the height direction than the sheet stacking surface of the alignment tray, the sheet bundle pushed out by the pushing member can be reliably discharged to the sheet discharge tray. It becomes possible.
[0069]
  And claims4According to this invention, since the rear end of the sheet bundle discharged by the discharge means is guided downward (on the sheet discharge tray side) along the downstream portion of the alignment tray, the sheet bundle is discharged without backflowing. It becomes possible to discharge to the tray.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a schematic configuration of a sheet post-processing apparatus according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a schematic configuration of a sheet post-processing apparatus according to an embodiment of the present invention.
FIG. 3 is a perspective view of the main part of the apparatus on the staple conveying path as viewed from the rear and diagonally;
FIG. 4 is a perspective view of a main part of the apparatus on the staple conveying path as seen from an oblique front.
FIG. 5 is an explanatory diagram showing a configuration of a matching unit.
FIG. 6 is an explanatory diagram showing a configuration of a tapping roller unit.
FIG. 7 is an explanatory diagram showing a configuration of a discharge unit.
FIG. 8 is an explanatory diagram illustrating a discharge state during a paper discharge process by a discharge unit including a pivotable support member.
FIG. 9 is an explanatory view showing a configuration of a discharge section provided with a pivotable support member.
FIG. 10 is an explanatory diagram illustrating a discharge state at the time of paper discharge processing by a discharge unit having no support member.
FIG. 11 is an explanatory view showing a configuration of a discharge portion where no supporting member is present.
FIG. 12 is an explanatory diagram illustrating a discharge state during a sheet discharge process by a discharge unit including a non-rotating (fixed) supporting member.
FIG. 13 is an explanatory view showing a configuration of a discharge portion including a support member that does not rotate.
FIG. 14 is a perspective view of the bottom plate, the alignment portion, and the discharge portion as viewed from obliquely below.
FIG. 15 is an explanatory diagram showing a state immediately after the paper is carried in the staple mode.
FIG. 16 is an explanatory diagram illustrating a first alignment state immediately after the paper is carried in the staple mode.
FIG. 17 is an explanatory view showing a rear end pressing state after the first alignment.
FIG. 18 is an explanatory diagram showing a second alignment state.
FIG. 19 is an explanatory view showing the alignment operation by the tapping roller unit.
FIG. 20 is an explanatory diagram showing an end state of the tacking operation.
[Explanation of symbols]
1 Paper post-processing device
4 Transport roller section
5 Switching claw
5a Transfer route A switching surface
5b Transfer route B switching surface
5c Paper pressing surface
5f tension spring
6 Output tray
7 Paper discharge roller pair
8 Bottom plate
10 Tachikikoro Club
11 Stapler device
12 Release part
12a Release claw
12e Support member
90 Matching part

Claims (4)

A discharge means for discharging the paper, an alignment tray that supports an upstream portion of the paper discharged from the discharge means, a post-processing means for performing post-processing on the alignment tray, and a sheet bundle post-processed by the post-processing means A paper post-processing device having a discharge means for discharging the paper, and a paper discharge tray for stacking a bundle of paper discharged by the discharge means,
The discharge means includes an extrusion member that discharges the post-processed sheet bundle, and a support member that prevents the sheet bundle from being bent when the sheet bundle is discharged by the extrusion member.
One end of the support member engages with the push-out member, and is provided so as to be rotatable only upward with respect to the stack surface of the paper discharge tray, and does not push out a bundle of sheets by the push-out member. When the sheet stack is maintained in a state substantially parallel to the sheet stacking surface of the alignment tray and the other end of the support member is stacked on the sheet discharge tray while the sheet stack is being pushed out by the push-out member. The sheet post-processing apparatus is characterized in that when it comes into contact with the sheet, it rotates upward.   The sheet post-processing apparatus according to claim 1, wherein the support member is formed so as to be able to advance and retreat integrally with the push-out member. The supporting member, the sheet post-processing apparatus according to claim 1 or 2, characterized in that provided at a position lower in height direction than the paper stacking surface of the alignment tray. The shape of the downstream portion of the matching tray according to any one of claims 1-3, characterized in that the rear end of the sheet bundle emitted by the emission means is a guide shaped to guide downward Paper post-processing equipment.

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