JPH0672062A - Post-treatment device of paper - Google Patents

Abstract

PURPOSE:To provide a paper post-treatment device which can bind papers without allowing an external force to concentrically work to one leg part of a stitching needle binding a bundle of papers even when the external force partially acts on the bundle of papers bound at one corner of one end thereof. CONSTITUTION:A bundle of papers discharged on a bin 6 by a transfer unit 5 is caught by a clamper unit 2 and sent to a staple unit 1. The staple unit 1 moved parallel to a stitching position is driven by a stapler rotating motor, and rotated by a predetermined angle in a direction parallel to the surface of tone papers discharged onto the bin 6. Accordingly, the bundle of papers are bound at a corner of one end thereof while the stitching position of a staple is inclined to the end of the bundle of papers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with an image forming apparatus or the like, which is provided with a sheet storing means stacked vertically and a sheet binding means for binding a sheet bundle stored by the sheet storing means. The present invention relates to a sheet post-processing device.

[0002]

2. Description of the Related Art A recent copying machine is called a sorter or finisher for performing operations such as sorting and binding in order to facilitate later handling when copying and ejecting a plurality of originals. In many cases, a post-processing device is attached. In such a post-processing device, a binding device called a stapler that binds one end of a sheet is movably arranged outward along one edge of an aligned sheet bundle, and one edge corner or one edge of the sheet bundle. A bundle of sheets is stapled at two locations separated from the center of the edge by driving a binding needle parallel or perpendicular to the one edge.

[0003]

Since the binding position of the sheet bundle bound at one end edge corner by such a post-processing device is normally the upper left corner with respect to the copied image, the page of the sheet bundle is turned up. When turned up, the rolled page is often flipped up to the upper left of the sheet bundle. However, as described above, since the binding needles of the sheet bundle are parallel or perpendicular to one edge of the sheet bundle, the external force applied to the rolled page is one of the binding needles of the sheet bundle. It concentrated on the legs, and the vicinity of the binding hole of the bound paper was easily damaged due to repeated turning operations or the action of a little strong external force, and the top or bottom paper was often dropped. . The present invention solves the above problems in the prior art, and even when an external force acts on a part of the sheets of the sheet bundle bound at one edge corner, the external force binds the sheet bundle. It is an object of the present invention to provide a sheet post-processing device capable of binding operation without intensively acting on one leg portion.

[0004]

In order to solve the above-mentioned problems, the present invention is arranged in parallel to one end edge of a bundle of sheets distributed by the sheet distributing means and stored in the sheet storing means, to the side of the sheet storing means. It has a parallel moving means for moving the positioned sheet binding means and a rotating means for rotating the sheet binding means in a direction parallel to the surface of the sheet bundle stored by the sheet storage means.

[0005]

When the sheet distribution means has finished distributing the sheets received to the sheet storage means, the parallel movement means is positioned on the side of the sheet storage means in parallel with one edge of the bundle of sheets stored by the sheet storage means. The binding means is moved, and the rotation means rotates the sheet binding means in a direction parallel to the surface of the sheet bundle stored by the sheet storage means, and orients the sheet binding means to a predetermined binding position and binding direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a sheet post-processing apparatus that is an embodiment of the present invention. In the figure, 1 is a staple unit, 2 is a clamper unit, 3 is a branching claw, 4 is a punching unit, 5 is a transport unit, 6 is a vertically stacked bin, 7 is a discharge tray, and 8 is a helical shaft. , 9 is a paper shifting device, 10 is a paper discharge sensor, 51
Is a paper discharge roller, 52 is a slide shaft, 53 is a drive belt, 54 and 55 are a pair of pulleys around which the drive belt 53 is stretched, 61 is a rear end fence of the bin 6, and 81 is coaxial with the helical shaft 8. A timing belt spanned between the provided pulleys, and 91 is a shifting rod of the sheet shifting device 9.

A copying machine (not shown) is connected to the right side of the sheet post-processing apparatus in the figure, and the copied sheet is fed into the carry-in port I. When the stacking mode is selected, the branch claw 3 is rotated clockwise to guide the sheet fed into the carry-in port I toward the upper transport path A, and the sorting, punching, or binding mode is selected. When the paper is fed, the branching claw 3 rotates counterclockwise to guide the paper fed into the carry-in port I toward the lower transport path B. When the perforation mode is selected, the sheet guided in the lower conveyance path B is conveyed through the lower conveyance path B by the two pairs of conveyance rollers 31 and 32 arranged along the lower conveyance path B. In the process, the punching unit 4 punches holes. The perforated sheet or another mode is selected, and the punching unit 4 does not perforate the sheet, and the sheet that has passed through is conveyed further downstream and reaches the conveyance unit 5.

The transport unit 5 is driven by the drive belt 53 and guided by the slide shaft 52 so as to be movable in the vertical direction. However, when the paper is received from the copying machine, it is fixed at a fixed position and the lower transport path is provided. The sheet conveyed through B is ejected at a high speed by the sheet ejection roller 51 toward the upper direction of the bin 6 at the sorting position. Pins (not shown) are planted at one position on the left side (on the paper surface in FIG. 1) and two positions on the right side (below the paper surface in FIG. 1) of the bin 6 with respect to the paper discharge direction, and three pins each are provided. Is engaged with the spiral groove of the helical shaft 8. As a result, the vertical position of each bin 6, and hence the bin interval, is regulated, and as the helical shaft 8 interlocked by the timing belt 81 is rotated, it is vertically guided by a guide (not shown). The helical groove of the helical shaft 8 has a large pitch only in the portion corresponding to the sorting position, and has a slightly smaller equal pitch in the other portions. Therefore, only the bin spacing of the bins 6 at the sorting position is larger than the bin spacing of the bins 6 at other positions. The sheet discharged onto the bin 6 at the sorting position falls along the bin 6 due to its own weight, hits the rear end fence 61 of the bin 6, and the rear ends are aligned. A predetermined time after the paper discharge sensor 10 detects the trailing edge of the paper, the paper shifting device 9 is driven,
The shifting operation rod 91 moves to the left (upper surface in FIG. 1) with respect to the paper discharge direction of the bin 6, fits in the notch portion (not shown) of the bin 6, and abuts the paper against the left end fence of the bin 6 (not shown). , Align the paper in the width direction. In parallel with the sheet aligning operation by the sheet aligning device 9, each helical shaft 8 makes one rotation to push up each bin 6 upward, and the bin 6 immediately below the bin 6 that has finished storing the paper is arranged at the sorting position. Let Hereinafter, when the sorting operation of the set number of copies of the transferred sheets is completed by repeating the above sorting operation, the helical shaft 8 is inverted to turn each bin 6
Is changed to the downward direction, the sorting operation similar to the above-described sorting operation is continued, and the vertical movement of each bin 6 up and down by the number of originals and the sorting operation are repeated, and the series of sorting operations is completed. .

When the binding mode for one-point binding is selected, the staple unit 1 and the clamper unit 2 in the standby position are driven by a driving mechanism (not shown) for moving in the vertical direction to move to the sorting position. Figure 2
3 and 4 are a front view and a side view of the staple unit 1, respectively. The detailed mechanism and one-point binding operation of the staple unit 1 of this embodiment will be described with reference to these drawings. The staple unit 1 is supported and fixed to the stapler bracket 11, and the stapler bracket 11 is attached to the stapler pedestal 33 via a rotation shaft 44.
It is rotatably supported by. A stapler rotation motor 42 is attached to the lower surface of the stapler pedestal 33, and a gear 43 fixed to the rotation shaft of the stapler rotation motor 42 is projected on the upper surface of the stapler pedestal 33 and fixed to the rotation shaft 44. It meshes with the fan-shaped gear 12 formed. Through holes 45 are formed in the two legs of the stapler stand 33 parallel to the paper receiving direction, are fixed to the main body frame 46, and extend in the direction parallel to the moving direction of the shifting operation rod 91. The slide shaft 30 has this through hole 45.
It is slidably fitted to. The staple driving position of the staple unit 1 is provided on the upper extension of the rotating shaft 44. Further, in the figure, 13 is a gear group of the staple unit 1, and 14 is a spring for urging the staple driving arm of the staple unit 1 in the direction of expanding. Rollers 34 are rotatably attached to the legs extending to the upper edge and the lower edge of the inclined main surface of the stapler pedestal 33, respectively, and the stapler pedestal 33 is attached to the main body frame 46 via the rollers 34. Fixed stapler guide 35
Supported by. Further, a timing belt 36 laid in parallel with the slide shaft 30 is fixed to a leg portion of the stapler pedestal 33, and the timing belt 36 is attached to a main body frame 46.
Driven by 7, the stapler cradle 33,
Therefore, the staple unit 1 can move in parallel with the slide shaft 30. The stapler moving end detection sensors 38 are provided near the mounting portion of the slide shaft 30 of the main body frame 46, respectively.
The stop position of the staple unit 1 is controlled by detecting the detection plate 39 protruding from the end of the inclined side.

FIG. 4 is a top view of the stapler bracket 11 and the stapler pedestal 33. FIG. 4A is a state in which the staple unit 1 is translated and stopped, and FIG.
Further, shows that the staple unit 1 is rotated by a predetermined angle θ and is in a needle driving preparation state. As shown in FIG.
The stapler rotation end detection sensors 40 and 41 are provided at the positions, and the rotation position of the staple unit 1 is controlled by detecting the detection plate 11a protruding from the inclined side edge of the stapler bracket 11. It has become. When the one-point binding mode signal is sent from the copying machine, the stapler moving motor 37 is driven to move the staple unit 1 moved to the sorting position to the slide shaft 3
It moves in parallel with 0, and the detection plate 3 of the stapler stand 33 is moved.
When 9 is detected by the stapler moving end detection sensor 38, the stapler moving end detection sensor 38 stops in the state shown in FIG. 4A, then the stapler rotation motor 42 rotates, and the stapler bracket 11 rotates. When the detection plate 11a is detected by the stapler rotation end detection sensor 40, FIG.
It stops in a state where it rotates by a predetermined angle θ shown in (b).
On the other hand, the gripping arm of the clamper unit 2 that has moved to the sorting position grips one end of the sheet bundle and pulls it out to the clamper unit 2 side, and further moves it to the staple unit 1 side so that one edge corner of the sheet bundle is moved to the staple unit 1 side. Align it with the needle driving position of. Simultaneously with the movement of the bundle of sheets of the clamper unit 2, the rear end fence 61 of the bin 6 is biased by a solenoid (not shown) to rotate about the designated end so as to be flush with the upper surface of the bin 6, thereby Allows the bundle to move to the staple unit 1 side. When the arrangement of the bundle of sheets to the staple driving position is completed, the staple unit 1 drives the staples to staple the bundle of sheets. The bound sheet bundle is again grasped by the grasping arm of the clamper unit 2 and moved, and returned to the original mounting position on the bin 6. Thus, when the binding operation of the first bundle of sheets is completed, each helical shaft 8 makes one rotation to push each bin 6 upward, and the bin 6 immediately below the bin 6 on which the bundle of sheets for which the binding operation is finished is placed. Are arranged at the sorting position, and thereafter, the same binding operation as the above-described binding operation of the sheet bundle is sequentially performed on the sheet bundle placed on each bin 6.

When the binding operation for all the bundles of sheets is completed, the stapler rotation motor 42 is rotated in the reverse direction, the stapler bracket 11 is rotated in the reverse direction, and the detection plate 11a thereof is detected.
Is detected by the stapler rotation end detection sensor 41, it stops in the state shown in FIG. Next, the stapler moving motor 37 is driven to move the staple unit 1 to return to the original standby position and stop. After that, the rear end fence 61 of the bin 6 at the sorting position is urged by the solenoid to rotate until it is flush with the upper surface of the bin 6, and the sheet bundle placed on the bin 6 falls by its own weight. One end of the dropped sheet bundle enters between the pair of discharge rollers 51 of the transport unit 5, and is stopped by being caught by the pair of stopped discharge rollers 51. The trailing edge of the stack of paper is the output sensor 1.
After a lapse of a predetermined time after the detection of 0, the drive belt 53 is driven, and the transport unit 5 moves upward while holding the bundle of sheets of paper that has been dropped by the pair of paper discharge rollers 51, and at a position facing the discharge tray 7. Stop. The bundle of sheets gripped by the pair of discharge rollers 51 is discharged onto the discharge tray 7 by the rotation of the discharge rollers 51. When the transport unit 5 that has discharged the bundle of sheets has returned to the original sorting position, the bundle of sheets placed on the next bin 6 moved by one rotation of each helical shaft 8 is discharged onto the discharge tray 7. The above-described discharging operation is performed, and thereafter, the discharging operation of this sheet bundle onto the discharge tray 7 is repeated until the discharging of all sheet bundles is completed. 5A and 5B show the directions of the staples that are driven into the sheet bundle when the binding processing for one-point binding is completed. FIG. 5A shows the conventional example, and FIG. 5B shows the one according to the present embodiment. There is. As shown in the figure, since the staples of the bundle of sheets bound according to the present embodiment are inclined with respect to the edge of the bundle of sheets by the angle θ at which the stapler bracket 11 is rotated, the folded sheets of the bundle of sheets are folded. Since the external force received by the binding needle from the binding needle acts on both legs substantially evenly, the vicinity of the binding holes of the bound sheets is less likely to be damaged, and the bottom or top sheet can be prevented from falling off as much as possible. When binding at two points, the stapler unit 1 is not rotated, and the stapler moving motor 37 is driven to move only in parallel with the slide shaft 30 as in the conventional case, so that one edge of the paper is The binding operation is performed to bind two locations around the center of the staple unit, but the rotation operation of the staple unit 1 is basically the same as the one-point binding operation described above. Therefore, a detailed description will be given. Omit it.

[0012]

As described above, according to the first aspect of the invention, the parallel moving means for moving the sheet binding means in parallel with the one edge of the sheet bundle stored by the sheet storing means, and the sheet storing means are stored. Since it has the rotating means for rotating the sheet binding means in the direction parallel to the surface of the bundle of sheets, it is possible to move the sheet binding means to a desired binding position and orient it in a desired binding direction. Even if an external force acts on a part of the sheets of the sheet bundle bound at one edge corner, the external force is prevented from intensively acting on one leg of the binding needle binding the sheet bundle. However, it is possible to prevent the sheets from falling off due to damage in the vicinity of the binding holes of the bound sheets. According to the second aspect of the present invention, the movement of the sheet binding unit is detected by the detection output of the detection unit that detects the moving position of the sheet binding unit by the parallel moving unit and the rotation angle of the sheet binding unit by the rotating unit. Since the rotation is controlled, the movement of the sheet binding unit to the desired binding position and the rotation in the desired binding direction can be accurately controlled.

[Brief description of drawings]

FIG. 1 is a front view of a sheet post-processing apparatus that is an embodiment of the present invention.

FIG. 2 is a front view of a staple unit.

FIG. 3 is likewise a side view.

FIG. 4 is a top view of a stapler bracket and a stapler cradle.

FIG. 5 is an explanatory diagram showing a direction of a binding needle of a sheet bundle in which one place is bound.

[Explanation of symbols]

 1 Staple Unit 2 Clamper Unit 5 Transport Unit 6 Bin 7 Ejection Tray 8 Helical Shaft 10 Paper Ejection Sensor 11 Stapler Bracket 12 Fan Gear 33 Stapler Cage 37 Stapler Moving Motor 38 Stapler Moving End Detection Sensor 40, 41 Stapler Rotating End Detection Sensor 42 Stapler rotation motor 61 Rear fence

Claims (2)

[Claims] 1. A plurality of sheet accommodating means that are vertically stacked and can accommodate the conveyed sheets, and a sheet distributing means that sequentially distributes the received sheets to the sheet accommodating means.
In a sheet post-processing apparatus including a sheet binding unit that is located on the side of the sheet storage unit and binds the sheet bundle stored by the sheet storage unit, the sheet post-processing device is arranged parallel to one edge of the sheet bundle stored by the sheet storage unit. Paper post-processing having parallel moving means for moving the paper binding means, and rotation means for rotating the paper binding means in a direction parallel to the surface of the paper stack stored by the paper storage means. apparatus. 2. A detection unit for detecting a moving position of the sheet binding unit by the parallel movement unit and a rotation angle of the sheet binding unit by the rotation unit, respectively, and the sheet binding based on the detection output of the detection unit. 2. The sheet post-processing apparatus according to claim 1, wherein the movement and rotation of the means are controlled.