JP2020083633A - Post-processing device, image formation system - Google Patents

Abstract

To prevent enlarging of a housing in a post-processing device.SOLUTION: A binding processing part for performing binding processing to a recording medium by forming a binding form; an angle changing part for changing an angle where the binding form is formed to the recording medium by moving the binding processing part; a guide member being a member for guiding so that the binding processing part moves to a position where the binding form is formed with respect to the recording medium; and a plurality of engaging members for engaging the angle changing part with the guide member. At least one of the plurality of engaging members is provided at an intersection point of a first perpendicular bisector relating to a first straight line and a second perpendicular bisector relating to a second straight line, being the first straight line and the second straight line formed by connecting respective end parts of a first formation width being a formation width when the binding form is formed on the recording medium and a second formation width being the formation width of the binding form formed at a position on the recording medium different from the first formation width.SELECTED DRAWING: Figure 3

Description

The present invention relates to a post-processing device and an image forming system.

In recent years, computerization of information has been promoted, and an image processing apparatus of a printer used for outputting computerized information has become an indispensable device. As such an image processing apparatus, one having a configuration including a post-processing apparatus that performs post-processing such as stapling processing on a sheet after print output is known (for example, see Patent Document 1).

Patent Document 1 discloses a post-processing apparatus having a processing mechanism for performing stapling processing, which performs stapling processing at a desired angle by moving the processing mechanism along a guide groove.

However, in the post-processing device disclosed in Patent Document 1, since the rotation shaft for rotating the processing mechanism is provided at the center of the processing mechanism, the processing mechanism should be rotated so that the binding position becomes the center of the sheet. Then, it is necessary to increase the size of the housing. On the other hand, when the housing is not upsized, the distance from the edge of the sheet to the binding position becomes short depending on the angle at which the stapling process is performed, so that sufficient binding strength cannot be obtained.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to prevent the housing of the post-processing apparatus from increasing in size.

In order to solve the above problems, according to one embodiment of the present invention, a binding processing unit which performs binding processing on a recording medium by forming a binding shape, and the binding processing unit is moved to move the binding processing unit to the recording medium. On the other hand, an angle changing unit that changes an angle at which the binding shape is formed, and a guide member that is a member that guides the binding processing unit so as to move to a position where the binding shape is formed with respect to the recording medium. A plurality of engaging members that engage the angle changing unit and the guide member, and at least one of the plurality of engaging members is used when the binding shape is formed on the recording medium. Formed by connecting respective ends of a first forming width which is a forming width and a second forming width which is a forming width of the binding shape formed at a position on the recording medium different from the first forming width. A first straight line and a second straight line, which are provided at an intersection of a first vertical bisector of the first straight line and a second vertical bisector of the second straight line. To do.

According to the present invention, it is possible to prevent the housing of the post-processing apparatus from increasing in size.

1 is a schematic configuration diagram of an image forming system according to an embodiment of the present invention. FIG. 3 is a functional block diagram showing a control configuration of the image forming system according to the embodiment of the present invention. The top view of the post-processing device concerning the embodiment of the present invention. Sectional drawing which shows schematic structure of the post-processing apparatus which concerns on embodiment of this invention. The schematic block diagram of the moving mechanism concerning the embodiment of the present invention. The schematic block diagram of the moving mechanism concerning the embodiment of the present invention. The figure which showed typically the rotating staple unit which concerns on embodiment of this invention. FIG. 6 is an explanatory diagram for explaining the positional relationship between the staple position of the staple and the staple unit according to the embodiment of the present invention. FIG. 6 is an explanatory diagram for explaining the positional relationship between the staple position of the staple and the staple unit according to the embodiment of the present invention. FIG. 5 is an explanatory diagram for explaining a rotation mode of the staple unit according to the embodiment of the present invention. FIG. 5 is an explanatory diagram for explaining a rotation mode of the staple unit according to the embodiment of the present invention. FIG. 5 is an explanatory diagram for explaining a rotation mode of the staple unit according to the embodiment of the present invention. FIG. 6 is an explanatory diagram for explaining an operation mode of the staple unit when performing the diagonal binding process according to the embodiment of the present invention. FIG. 6 is an explanatory diagram for explaining an operation mode of the staple unit when performing the diagonal binding process according to the embodiment of the present invention. FIG. 6 is an explanatory diagram for explaining an operation mode of the staple unit when performing the diagonal binding process according to the embodiment of the present invention. FIG. 6 is an explanatory diagram for explaining an operation mode of the staple unit when performing the diagonal binding process according to the embodiment of the present invention. FIG. 6 is an explanatory diagram for explaining an operation mode of the staple unit when performing the diagonal binding process according to the embodiment of the present invention. Explanatory drawing for demonstrating the shape of the guide member which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, an image forming system 1 including a post-processing device 200 that performs post-processing such as stapling on a recording medium such as the paper P after image formation and output will be described. In the following description, the same components will be denoted by the same reference symbols in the drawings, without redundant description.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, an image forming system 1 including a post-processing device 200 that performs post-processing such as stapling on a recording medium such as the paper P after image formation and output will be described. In the following description, the same components will be denoted by the same reference symbols in the drawings, without redundant description.

FIG. 1 is a schematic configuration diagram of an image forming system 1 according to the present embodiment. As shown in FIG. 1, the image forming system 1 includes an image forming apparatus 100, a post-processing apparatus 200, and an image reading apparatus 300.

The image forming apparatus 100 is a tandem color image forming apparatus of an indirect transfer type. The image forming apparatus 100 includes an image forming unit 110 in which image forming units of four colors are arranged, an optical writing unit 113 provided below the image forming unit 110, and a paper supply unit provided below the image forming unit 110. A paper feed path 130 (vertical feed path) for feeding a recording medium such as the paper unit 120 and the paper P picked up by the paper feed unit 120 to the secondary transfer unit 140 and the fixing unit 150, and the paper P on which an image is fixed. In order to reverse the sheet P on which an image is formed on one surface (for example, the front surface of the paper P) and to form an image on the other surface (for example, the back surface of the paper P), the paper discharge conveyance path 160 which is conveyed to the post-processing device 200. A double-sided conveyance path 170 for conveying the paper P is provided.

The image forming unit 110 is configured to include a photoconductor drum for each color of YMCK, a charging unit arranged along the outer periphery of the photoconductor drum, a developing unit, a primary transfer unit, a cleaning unit, and a charge eliminating unit. An image station 111, an intermediate transfer belt 112 that intermediately transfers an image formed on the photosensitive drum by a primary transfer unit, and an optical writing unit 113 that writes an image for each color on the photosensitive drum.

The optical writing unit 113 is arranged below the image forming station 111, and the intermediate transfer belt 112 is arranged above the image forming station 111. The intermediate transfer belt 112 is rotatably supported by a plurality of support rollers 114.

The support roller 114 faces the secondary transfer roller 115 via the intermediate transfer belt 112 in the secondary transfer section 140, and is capable of secondarily transferring the image on the intermediate transfer belt 112 to the paper P. The image forming process of the tandem type color image forming apparatus of the indirect transfer type is publicly known and has no direct relation to the gist of the present invention, and thus detailed description thereof will be omitted.

The paper feeding unit 120 includes a paper feeding tray 121, a pickup roller 122, and a paper feeding and conveying roller 123. The paper feed unit 120 feeds the paper P picked up from the paper feed tray 121 upward along the paper feed conveyance path 130. An image is transferred to the paper P sent out by the secondary transfer unit 140, and is sent to the fixing unit 150.

The fixing unit 150 includes a fixing roller and a pressure roller. The fixing unit 150 allows the sheet P to pass through the nip between the fixing roller and the pressure roller, and heats and pressurizes the sheet P during this period to fix the toner, which is a colorant, to the sheet P.

A paper discharge transport path 160 and a double-sided transport path 170 are provided downstream of the fixing unit 150 in the transport direction of the paper P. The paper discharge transport path 160 and the double-sided transport path 170 are branched in two directions by a branch claw 161.

As a result, when the sheet P is transported to the post-processing apparatus 200 side and when it is transported to the double-sided transport path 170, the respective transport paths are selected. A branch conveyance roller 162 for conveying the sheet P is provided upstream of the branch claw 161 in the sheet P conveyance direction.

Post-processing apparatus 200 is arranged inside the apparatus body of image forming apparatus 100, or is arranged above the apparatus body of image forming apparatus 100. The post-processing device 200 performs a predetermined process on the image-formed sheet P conveyed from the image forming apparatus 100, and stacks the sheet P on the sheet discharge tray 290 located at the most downstream side in the conveying direction. The details of the post-processing device 200 will be described later.

As shown in FIG. 1, in the image forming system 1, the post-processing device 200 is formed between the image forming device 100 and the image reading device 300 and is formed on the upper surface of the housing of the image forming device 100. The discharge tray 180, which is a so-called space on the housing (inside the body), is mounted. As a result, effective use of space and space saving can be achieved.

The image reading device 300 is a known device that optically scans a document set on a contact glass to read an image expressed on the document surface. The configuration and functions of the image reading device 300 itself are not directly related to the gist of the present invention, and thus detailed description thereof is omitted.

In the image forming apparatus 100 configured as described above, image data used for optical writing is generated based on document data read from the image reading apparatus 300 or print data transferred from an external PC or the like. ..

Then, the optical writing unit 113 performs optical writing on each photoconductor drum based on the generated image data, and the images formed for each color in the image forming station 111 are sequentially transferred to the intermediate transfer belt 112. As a result, a color image in which images of four colors are superimposed is formed on the intermediate transfer belt 112.

On the other hand, the paper P is fed from the paper feed tray 121 in accordance with the timing of image formation. The sheet P is temporarily stopped at the position of the registration roller just before the secondary transfer unit 140, and is fed out so as to be timed with the leading edge of the image formed on the intermediate transfer belt 112. Then, the image is secondarily transferred to the sheet P by the secondary transfer unit 140, and is sent to the fixing unit 150.

In the case of single-sided printing and after double-sided printing of double-sided printing, the paper P on which the image has been fixed by the fixing unit 150 is conveyed to the discharge conveyance path 160 side by the switching operation of the branch claw 161 and in the case of double-sided printing. Is conveyed to the double-sided conveyance path 170 side.

The sheet P conveyed to the double-sided conveyance path 170 is reversed, then sent to the secondary transfer section 140, and after an image is formed on the other side, the sheet P is returned to the discharge conveyance path 160 side. The paper P that has been conveyed to the paper discharge conveyance path 160 side is conveyed to the post-processing device 200, and is subjected to predetermined paper processing (post-processing) in the post-processing device 200, or is discharged to the paper discharge tray 290 without any processing. To be done.

FIG. 2 is a functional block diagram showing the control configuration of the image forming system 1. The control of the image forming apparatus 100 is executed by the image forming apparatus control unit 410 including a CPU 411, a ROM 412, a RAM 413, a nonvolatile RAM 414, a serial I/F 415, a timer 416, and the like.

A program for controlling the image forming apparatus 100 is stored in the ROM 412, and the CPU 411 reads the program stored in the ROM 412 and expands it in the RAM 413. The CPU 411 stores information necessary for control in the RAM 413 and controls the image forming apparatus 100 by executing the program while using the RAM 413 as a working memory.

The image forming apparatus control unit 410 includes a DC load such as a motor used in the image forming unit 110 such as a photoconductor, a paper feed unit 120, a paper feed conveyance path 130, and various motors and clutches in the double-sided conveyance path 170. 450, an AC load 470, a temperature sensor for detecting the temperature of the fixing roller, and a sensor 460 such as a paper thickness detection sensor 460a for detecting the thickness of the paper P being conveyed are connected. The image reading apparatus 300 and the operation display unit 440 are connected to the image forming apparatus control unit 410, and each unit is controlled via the image forming apparatus control unit 410.

The control of the post-processing device 200 is executed by the post-processing device control unit 400 including a CPU 401, a ROM 402, a RAM 403, a serial I/F 404, a timer 405, and the like.

A program for controlling the post-processing device 200 is stored in the ROM 402, and the CPU 401 reads the program stored in the ROM 402 and expands it in the RAM 403. The CPU 401 further stores information necessary for control in the RAM 403, and executes the program while using the RAM 403 as a working memory to realize a function of controlling the DC load 420.

The image forming apparatus 100 and the post-processing apparatus 200 exchange commands necessary for controlling the conveyance of the paper P via the serial I/F 415 and the serial I/F 404. The CPU 401 of the post-processing apparatus control unit 400, based on the command received from the image forming apparatus 100 and the paper position information indicating the position of the paper P obtained from the paper surface detection sensor, each unit that configures the post-processing apparatus 200 illustrated in FIG. Control of.

That is, based on the command received from the image forming apparatus 100 and the paper position information indicating the position of the paper P obtained from the paper surface detection sensor, the post-processing device controller 400 controls the drive of the entrance roller pair 202 and the shift roller pair 210. Drive control of the jogger fences 250a and 250b in the width direction, drive control of the rear end guide 220 and front end stopper 260, and drive control of the staple unit 280 are performed.

FIG. 3 is a plan view of the post-processing device 200, and FIG. 4 is a cross-sectional view showing a schematic configuration of the post-processing device 200. The post-processing device 200 includes an end fence 270, a pair of shift rollers 210, rear and front jogger fences 250a and 250b, a rear end guide 220, a staple unit 280, a front end stopper 260, and a paper discharge tray 290. The dotted arrows shown in FIGS. 3 and 4 indicate the directions in which the respective parts move.

That is, a guide plate that receives the paper P from the paper discharge conveyance path 160 of the image forming apparatus 100 is arranged in the paper receiving unit of the post-processing apparatus 200. Further, the inlet roller pair 202 is arranged on the most upstream side of the guide plate in the conveyance direction of the paper P, and the shift roller pair 210 having a function of shifting the paper P and discharging it to the paper discharge tray 290 is provided on the most downstream side. .. Then, the motor rotates the shift roller pair 210, so that the paper P is conveyed along the guide plate.

The paper discharge operation includes a shift mode in which the paper P is shifted and discharged (also referred to as a “straight paper discharge mode” because the paper P is discharged without post-processing). The staple mode differs from binding and discharging. Here, each mode will be described.

The shift mode is a mode in which when the paper P is ejected, the paper ejection position of the paper P is shifted in a direction perpendicular to the conveying direction of the paper P for every predetermined number of sheets, and the paper P is sorted by this "shift".

The shift roller pair 210 is provided at the most downstream end of the guide plate in the conveyance direction of the paper P, and is reciprocally driven by a shift motor in a direction perpendicular to the conveyance direction of the paper P. Therefore, in the shift mode, the shift roller pair 210 is moved in the direction perpendicular to the conveyance direction of the paper P for every predetermined number of sheets, and the paper P is moved by the amount that the shift roller pair 210 is moved in the direction perpendicular to the conveyance direction of the paper P. The paper is discharged to the paper discharge tray 290 in the shifted state.

The operation of shifting the paper P by the amount of movement of the shift roller pair 210 in the direction perpendicular to the conveyance direction of the paper P is a so-called shift operation. In this way, when the sheets P are stacked on the sheet discharge tray 290, the sheet P is sorted by alternately shifting the sheet discharge positions of the sheets P by a predetermined number. Since the shift mechanism itself for shifting is a known mechanism, description thereof is omitted here.

When the sheet P is discharged in the shift mode, the jogger fences 250a and 250b are retracted from the space above the discharge tray 290 to the outside (direction W in FIG. 3) by the jogger fence movement motor. After the jogger fences 250a and 250b are retracted, the leading edge stopper 260 is moved to the standby position (downstream in the sheet P transport direction) by the leading edge stopper drive motor. Further, the paper discharge tray 290 is lifted up to the height of the jogger fences 250a and 250b by the paper discharge tray lifting motor.

The standby position of the front end stopper 260 is preferably a position of +25 mm for the paper discharged from the paper rear end receiving portions of the jogger fences 250a and 250b. In the default state, the paper surface detection sensor stands by at a position where the height of the paper discharge tray 290 can be detected.

At this time, the paper surface detection sensor is configured to be turned off when the height of the paper discharge tray 290 is less than the jogger fences 250a and 250b, and turned on when the height is equal to or higher than the height of the jogger fences 250a and 250b. Has been done. Therefore, the paper surface detection sensor can detect the height of the paper discharge tray 290 by switching ON/OFF.

When it is detected that the paper surface detection sensor is turned on by the movement of the filler that the paper discharge tray 290 has risen to the positions of the jogger fences 250a and 250b, the paper discharge tray 290 stops the raising operation. When the paper ejection tray 290 stops the raising operation, the paper surface detection sensor rotates about the axis and retracts the tip of the arm portion into the end fence 270.

After the movement of each unit is completed, the sheet P is ejected from the shift roller pair 210 to the sheet ejection tray 290, and at the timing when the trailing edge of the sheet P comes out of the shift roller pair 210, the tip of the arm portion of the trailing edge guide 220 is It rotates around the axis and descends toward the paper discharge tray 290. By this operation, it is possible to prevent a jam that occurs when the next sheet is discharged while the trailing edge of the sheet P does not fall from the shift roller pair 210.

When the trailing edge guide 220 descends, the leading edge stopper 260 moves from the standby position to the sheet receiving position on the upstream side in the transport direction of the sheet P. Then, the front end stopper 260 and the rear end receiving portions of the jogger fences 250a and 250b sandwich the paper P, so that the ends of the paper P in the transport direction are aligned in a line.

Hereinafter, the position alignment in which the ends of the paper P in the transport direction are aligned in a line is referred to as the alignment of the paper P. When the sheets P are aligned, the leading edge stopper 260 moves to the standby position again, and the trailing edge guide 220 moves up.

When the paper P is aligned by the front end stopper 260, the paper surface detection sensor moves from the retracted position to the detection position and detects the height of the paper discharge tray 290. Then, the paper discharge tray 290 starts descending, and when the paper surface detection sensor is turned off, the descending operation is stopped.

At this time, since the aligned sheets P are stacked on the discharge tray 290, the sheet surface detection sensor detects the height of the discharge tray 290 including the thickness of the stacked sheets P. .. Therefore, when the paper discharge tray 290 is lowered by the thickness of the stacked paper P, the paper surface detection sensor is turned off.

By this series of operations, the distance from the nip of the shift roller pair 210 to the uppermost sheet P stacked on the sheet discharge tray 290 is kept constant, so that the sheet P can be stacked on the sheet discharge tray 290. .. After the completion of lowering of the paper discharge tray 290, the paper surface detection sensor moves to the retracted position.

At this time, the lowering operation of the discharge tray 290 may be performed once for every several sheets of paper P instead of once for each sheet of paper P. When all the print jobs are completed, the paper discharge tray 290 is lowered to the bottom.

Then, the jogger fences 250a and 250b and the front end stopper 260 move to the position before the start of the print job, and wait at that position until the start of the next print job.

Next, the paper discharge operation in the staple mode will be described. The staple mode is a mode in which a bundle of sheets P is bound by a stapler every predetermined number of sheets when the sheets P are discharged, and the sheets are discharged.

When performing the stapling process on the paper P in the staple mode, the paper discharge tray 290 and the jogger fences 250a and 250b move to the paper receiving position. The paper receiving positions of the jogger fences 250a and 250b are the positions shown in the direction W in FIG.

The stapling unit 280 also moves to the stapling position where the stapling process is performed on the paper P by the motor. When the paper discharge tray 290 and the jogger fences 250a and 250b move to the paper receiving position, the leading end stopper 260 moves to the paper receiving position.

At this time, the paper discharge tray 290 is positioned 30 mm below the bottom surfaces of the jogger fences 250a and 250b, and the paper receiving positions of the jogger fences 250a and 250b are positioned 7 mm outside the paper width of the discharged paper P, respectively. It is desirable to be located. Further, it is desirable that the front end stopper 260 is set so as to be positioned at +25 mm for the paper discharged from the paper rear end receiving portions of the jogger fences 250a and 250b.

When the fact that the paper surface detection sensor is turned on by the movement of the filler is detected that the paper discharge tray 290 has moved to the specified position, the paper surface detection sensor rotates about the axis and the front end of the arm portion is inside the end fence 270. Evacuate to.

At this time, the layout position of the paper surface detection sensor can be offset (displaced). In such a case, in the shift mode, the specified position of the paper discharge tray 290 in the staple mode can be detected by moving the filler used for detecting the height of the paper discharge tray 290.

Further, in such a case, the configuration without the filler may be used. In the default state, the paper surface detection sensor stands by at a position where the paper discharge tray 290 can be detected.

As in the shift mode, the paper surface detection sensor is ON when the height of the discharge tray 290 is 30 mm or less from the bottom surface of the jogger fences 250a and 250b, and the height of the discharge tray 290 is the jogger fences 250a and 250b. It is also configured to be turned off when the height is higher than the bottom surface +30 mm. Therefore, the height of the paper discharge tray 290 can be detected by switching ON/OFF of the paper surface detection sensor.

After the movement of each unit is completed, the paper P is ejected from the shift roller pair 210 to the paper ejection tray 290, and at the timing when the rear end of the paper P comes out of the shift roller pair 210, the front end of the arm portion of the rear end guide 220 is , Rotates about an axis and descends toward the paper discharge tray 290. By this operation, it is possible to prevent a jam caused by discharging the next sheet without the trailing edge of the sheet P dropping from the shift roller pair 210.

It should be noted that the rear end guide 220 and the respective arm portions of the paper surface detection sensor are provided at positions that do not contact the jogger fences 250a and 250b located at the paper receiving position, in order to avoid contact with the jogger fences 250a and 250b. The layout is such that it is not necessary to move the paper P in the width direction.

After the trailing edge guide 220 descends, the leading edge stopper 260 moves from the standby position to the sheet receiving position on the upstream side in the transport direction, and the sheet P is sandwiched between the leading edge stopper 260 and the trailing edge sheet receiving portions of the jogger fences 250a and 250b. Then, the sheets P are aligned.

At the same time as aligning the sheets P, the jogger fence 250a and the jogger fence 250b move inward (toward the sheet P) to align the sheets P. At this time, the paper P is aligned in the paper width direction (direction perpendicular to the paper P transport direction). When the alignment is completed, the jogger fences 250a and 250b and the front end stopper 260 move to the standby position again, and the rear end guide 220 moves up.

A series of alignment operations are repeated from the first sheet of paper P to the final paper, and when the alignment of the final paper is completed, the leading end stopper 260 retracts from between the jogger fences 250a and 250b. Then, the bundle of sheets P is moved in a state where the nipping positions of the sheets P in the width direction (main scanning direction) by the jogger fences 250a and 250b are relatively maintained.

Specifically, the paper P is moved by the jogger fences 250a and 250b up to a position where staple processing (binding processing) can be performed by the staple unit 280 arranged on the back side of the jogger fence 250b (hereinafter referred to as staple position). Move a bunch of. When the jogger fences 250a and 250b move to the stapling position, the stapling unit 280 performs stapling processing on the bundle of sheets P.

After the completion of the stapling process by the stapling unit 280, the jogger fences 250a and 250b move to the position where the sheets P are aligned in the width direction. Further, the leading end stopper 260 also moves to the sheet receiving position in accordance with the movement of the jogger fences 250a and 250b.

When the movement of the jogger fences 250a and 250b and the tip stopper 260 is completed, the jogger fences 250a and 250b move toward the outside (the side opposite to the direction in which the paper P is sandwiched in the width direction, the direction W in FIG. 3).

As a result, the bundle of sheets P falls on the sheet discharge tray 290 located below the jogger fences 250a and 250b. When the bundle of sheets P falls, the jogger fences 250a and 250b and the front end stopper 260 move to the sheet receiving position. When the bundle of sheets P falls from the jogger fences 250a and 250b, the sheet surface detection sensor moves from the retracted position to the detection position and detects the height of the sheet discharge tray 290.

Then, the paper ejection tray 290 starts to descend, and when the paper surface detection sensor is turned off, the paper ejection tray 290 stops the lowering operation.

At this time, since the stapled paper P is stacked on the discharge tray 290, the paper surface detection sensor detects that the height of the discharge tray 290 including the thickness of the stacked paper P is high. That's it. Therefore, when the paper discharge tray 290 is lowered by the thickness of the stacked paper P, the paper surface detection sensor is turned off.

As a result, the distance from the bottom surface of the jogger fences 250a and 250b to the uppermost sheet P on the sheet discharge tray 290 is kept constant, so that a large number of sheets P can be stacked. When all the print jobs are completed, the paper discharge tray 290 is lowered to the lowermost position (initial position).

With the configuration described above, the post-processing apparatus 200 can execute the print job using the operation modes of the shift mode and the staple mode.

Next, the configuration of the moving mechanism 500 that moves the staple unit 280 according to the present embodiment will be described. FIG. 5 is a schematic configuration diagram of the moving mechanism 500 according to the present embodiment.

The staple unit 280, which is a binding processing unit, is engaged with the angle changing unit 37, which is a movable direction changing unit. The angle changing portion 37 is engaged with the guide member 26 via the engaging members 27, 28 and 29. Sliding members 38, 39 that slide with the guide member 26 are provided on the leading end sides of the engaging members 27, 28, 29 (the side on which the staple unit 280 is not engaged).

The moving portion 25 is provided between the angle changing portion 37 and the guide member 26, and supports the engaging member 29 by the opening formed in the moving portion 25. The moving unit 25 moves along the engaging member 23 and slides by the sliding member 40 and the floor material (a supporting member that supports the staple unit 280).

The position of the staple unit 280 is detected by the filler provided in the moving unit 25 passing through the position detecting unit 36 including a sensor. The post-processing device controller 400 controls the position of the staple unit 280 based on the detection result. The moving unit 25 moves along the engaging member 23 by the belt 22 and the driving unit 21.

The engagement member 27 is arranged at the center of rotation when the staple unit 280 rotates. The engaging member 28 is arranged on a straight line in the moving direction of the engaging member 27. The engaging member 29 is arranged on a vertical straight line in the moving direction of the engaging member 27.

With such a configuration, it is possible to dispose the guide member 26 inside the housing of the post-processing device 200 without making the guide member 26 complicated. Further, on the guide member 26, backflow preventing members 31, 32, 33, 34 which are track control members for controlling the tracks of the engaging members 27, 28, 29 are provided.

The backflow preventing members 31 and 32 prevent the engaging member 28 from backflowing, and the backflow preventing members 33 and 34 prevent the engaging member 29 from backflowing. The backflow preventing members 31 and 32 are configured to open when pushed from one side by the engagement member 28 and not to open when pushed from the opposite side.

FIG. 7 is a diagram schematically showing the staple unit 280 that rotates when the engagement member 27 reaches the point C1. When the engaging member 27 reaches the point C1 when the engaging member 27 is moving from the direction m1 in FIG. 6 and reaches the point C2 when the engaging member 27 is moving from the direction m2 in FIG. The unit 280 is configured to rotate.

8 and 9 are explanatory views for explaining the positional relationship between the staple position of the staple and the staple unit 280 when the staple unit 280 rotates.

In FIG. 8, in the staple unit 280, the staple position when performing the parallel binding process is 51 (first target binding position), and the staple position when performing the diagonal binding process is 52 (second target binding position).

At this time, in the staple unit 280, a vertical bisector 51c (first vertical line) of a straight line (first straight line) connecting the needle end portion 51a when performing the parallel binding processing and the needle end portion 52a when performing the diagonal binding processing. Bisector) and a vertical bisector 52c (second straight line) of a straight line (second straight line) connecting the needle end 51a opposite to the needle end 51a and the needle end 52a opposite to the needle end 52a. The staple unit 280 rotates about the intersection 53 with the vertical bisector.

Further, the needle ends 51a and 52a rotate around a circle 54 passing through the two points of the needle ends 51a and 52a with the intersection 53 as the center. Similarly, the needle ends 51b and 52b rotate about a circle 55 passing through the two points of the needle ends 51b and 52b with the intersection 53 as the center.

Therefore, the staple unit 280 has two different end portions on the same side of the binding shape (for example, the forming width of the binding shape formed by the binding processing, that is, the width of the staple that binds the paper P by the binding processing). The left end portions of the staples or the right end portions of the staples are connected to each other, and the staple needles are rotated about the intersections of the respective perpendicular bisectors of the first straight line and the second straight line.

In the example shown in FIG. 8, the binding width formed by the needle end portion 51a and the needle end portion 51b is the first forming width, and the binding shape formed by the needle end portion 52a and the needle end portion 52b. Is the second formation width.

Further, when the target position of the diagonal binding process is different, the position of the rotation center of the staple unit 280 also changes, as shown in FIG. However, the geometric relationship of the rotation center of the staple unit 280 is the same as in FIG.

In FIG. 9, it is assumed that the staple unit 280 has a staple position of 56 when performing the parallel binding process and a staple position of 57 when performing the diagonal binding process. Then, the staple unit 280 causes the vertical bisector 56c (first vertical line) 56c of the straight line (first straight line) connecting the needle end portion 56a when performing the parallel binding process and the needle end portion 57a when performing the diagonal binding process. It rotates about the intersection 58 of the vertical bisector 57c (second vertical bisector) of the straight line (second straight line) connecting the needle ends 56b and 57b opposite to the bisector.

Further, the needle ends 56a, 57a rotate about a circle 59 passing through the two points of the needle ends 56a, 57a with the intersection 58 as the center. Similarly, the needle ends 56b, 57b will rotate along a circle 60 passing through the two points of the needle ends 56b, 57b with the intersection 58 as the center.

In the example shown in FIG. 9, the binding width formed by the needle end portion 56a and the needle end portion 56b is the first forming width, and the binding shape formed by the needle end portion 57a and the needle end portion 57b. Is the second formation width.

Therefore, by disposing the engaging member 27 on the intersection 53, the intersection 58, or the intersection satisfying the geometrical relationship as described in FIGS. 8 and 9, the staple unit 280 performs the parallel binding process and the diagonal binding process. Is possible. Further, by doing so, it becomes possible to perform the diagonal binding process with a desired angle using the staple unit 280.

In the moving mechanism 500, the engaging member 27 is the first engaging member, the engaging member 28 is the second engaging member, and the engaging member 29 is the third engaging member. When the position where the engaging member 27 is provided is the first position, the engaging member 28 is provided at the second position on a straight line parallel to the moving direction of the staple unit 280 from the engaging member 27. The engaging member 29 is provided at a third position on a straight line perpendicular to the moving direction of the staple unit 280 from the engaging member 27.

Next, a configuration for rotating the staple unit 280 according to this embodiment will be described. FIG. 10 is an explanatory diagram for explaining a rotation mode of the staple unit 280 according to the present embodiment.

As shown in FIG. 10, as the moving unit 25 moves in the direction of the arrow in FIG. 10, the engaging member 27 moves to the point C2. The guide member 26 is formed in a concentric shape that engages with the engaging member 28 around the point C2, and further, has a concentric shape that engages with the engaging member 29 around the point C2. .. The staple unit 280 rotates by being moved along the guide member 26 having such a shape.

The backflow prevention member 32 is configured to be released by being pushed by the engagement member 28 only when the moving portion 25 moves in the arrow direction. Similarly, the backflow prevention member 33 is also configured to be pushed and released by the engagement member 29 only when the moving portion 25 moves in the arrow direction.

As shown in FIG. 11, when the moving unit 25 further advances in the arrow direction in FIG. 11, the engaging members 27, 28, 29 also move along the guide member 26. Then, as shown in FIG. 21, when the moving unit 25 reaches the position of the position detecting unit 36, the filler provided on the moving unit 25 is detected. The post-processing device control unit 400 stops the movement of the moving unit 25 when it is determined that the filler is detected.

In addition, in the present embodiment, the position where the moving unit 25 stops when the moving unit 25 reaches the position of the position detecting unit 36 is set as the home position. At the home position, the staple unit 280 is arranged in a direction rotated by 90 degrees from the arrangement when performing the parallel binding process.

Therefore, the straight line (third straight line) connecting the engaging member 27 and the engaging member 28 forms an angle of 90 degrees from the position at which the parallel binding process is performed on the paper P, and moves to the home position. Will be reached.

Next, an operation mode of the staple unit 280 when performing the diagonal binding process according to the present embodiment will be described. FIG. 13 is an explanatory diagram for explaining an operation mode of the staple unit 280 when performing the diagonal binding process.

When the moving unit 25 moves in the direction of the arrow in FIG. 13, the staple unit 280 also moves along the shape of the guide member 26. Therefore, when the engagement member 28 reaches the backflow prevention member 32, the staple unit 280 is in a diagonal state with respect to the moving direction of the moving unit 25.

As shown in FIG. 14, the guide member 26 maintains the state in which the staple unit 280 is obliquely arranged with respect to the end portion of the sheet P until the engagement member 27 reaches the point C1. It has a first guide shape that enables movement in the direction of the arrow inside (this direction is the same as the direction of the arrow in FIG. 13). Therefore, it is possible to perform the diagonal binding process by the staple unit 280 according to each sheet size.

When the moving unit 25 moves in the direction of the arrow in FIG. 13, the engaging member 27 moves to the position of the point C1. At this time, the engagement member 28 and the engagement member 29 each move so as to draw a concentric orbit around the point C1.

As shown in FIG. 15, in the staple unit 280, the guide member 26 maintains the state in which the staple unit 280 is arranged in parallel with the end portion of the paper P, and in the direction of the arrow in FIG. Has a second guide shape that enables movement in the same direction as the arrow in FIGS. 13 and 14. Note that FIG. 17A illustrates a state in which the engaging member 27 rotates the staple unit 280 so as to perform the binding process on the sheet P at an angle when the engaging member 27 is at the position C1.

The backflow prevention member 31 is configured to open by being pushed by the engagement member 28 only when the moving portion 25 moves in the direction of the arrow in FIG. 13. Similarly, the backflow prevention member 34 is also opened by being pushed by the engagement member 29 only when the moving portion 25 moves in the direction of the arrow in FIG. 13.

Then, as shown in FIG. 16, when the moving unit 25 further advances in the direction of the arrow in FIG. 16, the staple unit 280 starts to rotate so that the inclination direction is opposite to that in FIG. , The staple needle can be slanted with respect to the edge of the sheet P.

At this time, the staple unit 280 rotates about the engaging member 27 as the center of rotation so that the inclination direction is opposite to that in FIG. At this time, if it is assumed that the staple unit 280 is rotated so as to perform the binding process on the sheet P diagonally, the staple position becomes shallow as shown in FIG. 17B.

The guide member 26 according to the present embodiment has a shape that allows the staple unit 280 to rotate about a position C3 that is line-symmetric with respect to the center of the binding position 30 with respect to the engaging member 27, and further, the engaging member 27 , 28s, 29 are formed in a shape such that the orbits thereof are arcuate.

Therefore, in the present embodiment, as shown in FIG. 17C, the position C3, which is line-symmetric with respect to the center of the binding position 30 with respect to the engaging member 27, is set as the rotation center, so that the end of the paper P is fed to the paper P. It is possible to strike a staple at a deep position toward the center of the.

Next, the shape of the guide member 26 will be described with reference to FIG. FIG. 18 is an explanatory diagram for explaining the shape of the guide member 26 according to this embodiment.

When the engaging member 29 is arranged at a position (a fourth position of the engaging member 29 at this time) in the vicinity other than on a vertical straight line in the moving direction of the engaging member 27, as shown in FIG. In the case where the engaging member 29 is on the left side of the position on the vertical straight line of the engaging member 27, the guide member 26 is formed in a circular arc shape like 26b.

On the other hand, as shown in FIG. 18C, when the engaging member 29 is on the right side of the position on the vertical straight line of the engaging member 27, the guide means of the guide member 26 has an arc like 26c. It is formed in the shape to draw. Note that FIG. 18A is a diagram showing a case where the engaging member 29 is arranged at a position on a vertical straight line in the moving direction of the engaging member 27.

As described above, in the post-processing apparatus 200 according to the present embodiment, the default position of the staple unit 280 is a position that is oriented 90 degrees horizontally, and a space is provided so that the jogger fence 250b can enter the back side of the machine. You can This allows the post-processing device 200 to have a compact housing.

Further, since the staple unit 280 can be moved in a state where a desired angle is formed with respect to the paper P, the staple can be driven into a deep position from the end of the paper P toward the center of the paper P. The binding strength can be improved.

The present invention is not limited to the embodiments described above, and other embodiments, additions, modifications, deletions and the like can be modified within the scope that those skilled in the art can contemplate, and in any aspect. The present invention is included in the scope of the present invention as long as the effects and advantages of the present invention are exhibited.

For example, as the post-processing device 200, a device that performs punching process, a device that performs binding process without staples, etc. may be used in addition to the device that performs stapling process.

1: image forming system 21: drive unit 22: belt 23: engaging member 25: moving unit 26: guide member 27: engaging member 28: engaging member 29: engaging member 31: backflow preventing member 32: backflow preventing member 33: Backflow prevention member 34: Backflow prevention member 36: Position detection unit 37: Angle changing unit 38: Sliding member 39: Sliding member 40: Sliding member 100: Image forming device 110: Image forming unit 111: Image forming station 112: Intermediate transfer belt 113: Optical writing section 114: Support roller 115: Secondary transfer roller 120: Paper feeding section 121: Paper feeding tray 122: Pickup roller 123: Paper feeding/conveying roller 130: Paper feeding/conveying path 140: Secondary Transfer unit 150: Fixing unit 160: Paper discharge conveyance path 161: Branching claw 162: Branching conveyance roller 170: Double-sided conveyance path 180: Paper discharge tray 200: Post-processing device 202: Entrance roller pair 210: Shift roller pair 220: Rear end Guide 250a: Jogger fence 250b: Jogger fence 260: Tip stopper 270: End fence 280: Staple unit 290: Paper ejection tray 300: Image reading device 400: Post-processing device controller 401: CPU
402: ROM
403: RAM
404: Serial I/F
405: timer 410: image forming apparatus control unit 411: CPU
412: ROM
413: RAM
414: Non-volatile RAM
415: Serial I/F
416: Timer 420: DC load 440: Operation display unit 450: DC load 460: Sensor 460a: Paper thickness detection sensor 470: AC load P: Paper

JP, 2016-128359, A

Claims (10)

A binding processing unit that performs binding processing on a recording medium by forming a binding shape;
An angle changing unit that changes the angle at which the binding shape is formed with respect to the recording medium by moving the binding processing unit,
A guide member that is a member that guides the binding processing unit to move to a position where the binding shape is formed with respect to the recording medium,
A plurality of engaging members that engage the angle changing unit and the guide member,
At least one of the plurality of engaging members is
A first forming width which is a forming width when the binding shape is formed on the recording medium, and a forming width of the binding shape which is formed at a position on the recording medium different from the first forming width. A first straight line and a second straight line formed by connecting respective ends of the second forming width, wherein the first vertical bisector of the first straight line and the second vertical straight line of the second straight line A post-processing device, characterized in that it is provided at the intersection with the bisector. A binding processing unit that performs binding processing on a recording medium by forming a binding shape;
An angle changing unit that changes the angle at which the binding shape is formed with respect to the recording medium by moving the binding processing unit,
A guide member that is a member that guides the binding processing unit to move to a position where the binding shape is formed with respect to the recording medium,
A plurality of engaging members that engage the angle changing unit and the guide member,
The angle changing unit,
A first forming width which is a forming width when the binding shape is formed on the recording medium, and a forming width of the binding shape which is formed at a position on the recording medium different from the first forming width. A first straight line and a second straight line formed by connecting respective ends of the second forming width, wherein the first vertical bisector of the first straight line and the second vertical straight line of the second straight line A post-processing apparatus, characterized in that an angle at which the binding shape is formed is changed around an intersection with the bisector. Of the engaging members,
The first engagement member is provided at the intersection,
The second engagement member is provided at a second position on a straight line parallel to the moving direction of the binding processing unit from the first engagement member,
The third engagement member is provided at a third position on a straight line perpendicular to the moving direction of the binding processing unit from the first engagement member or at a fourth position in the vicinity of the third position. The post-processing device according to claim 1 or claim 2. The guide member is
It is formed in a shape that guides the binding processing unit so that the orbits of the second engagement member and the third engagement member have an arc shape with the first engagement member as the center. Item 4. The post-processing device according to item 3. The third straight line, which is engaged with the angle changing portion via the third engaging member and connects the first engaging member and the third engaging member, forms an angle of 90 degrees. The post-processing apparatus according to claim 3 or 4, further comprising a moving unit that moves the angle changing unit. The guide member is
The binding is performed such that the orbit of the engaging member is arcuate about the intersection of the first vertical bisector of the first straight line and the second vertical bisector of the second straight line. The post-processing device according to claim 1, wherein the post-processing device is formed in a shape that guides the processing unit. The guide member is
A first guide shape that guides the binding processing unit so that the binding processing unit moves while being arranged at an angle with respect to the end portion of the recording medium;
7. A second guide shape that guides the binding processing unit so that the binding processing unit moves parallel to the end portion of the recording medium. 7. The post-treatment device according to one item. The post-processing according to any one of claims 1 to 7, further comprising: a trajectory control member that is rotatably provided on the guide member and that controls a trajectory of the engagement member in the guide member. apparatus. An image forming apparatus for forming an image on the recording medium,
The post-processing device according to claim 1, wherein the recording medium on which an image is formed by the image forming device is post-processed.
An image forming system comprising: The post-processing device,
The image forming system according to claim 9, wherein the image forming system is provided inside or above an apparatus main body of the image forming apparatus.