JP2017007772A - Paper post-processing device - Google Patents

Abstract

[PROBLEMS] To correct the transport in a slanting direction with a simple structure, improve the stapling accuracy and the paper alignment accuracy, and improve the productivity.
The aligning means C is configured to convey a sheet while conveying the sheet by shifting the sheet conveying roller 52 for a predetermined period of time by a conveyance direction correcting unit 20 in which the sheet conveying roller 52 is capable of rotating about a pivot. Part.
[Selection] Figure 3

Description

  The present invention relates to a sheet post-processing apparatus connected to an image forming apparatus such as a multifunction peripheral device, a copying machine, or a printer.

  2. Description of the Related Art Conventionally, a paper post-processing device that performs jogger stack processing and stapling processing on paper conveyed from an image forming apparatus such as a multifunction peripheral device, a copying machine, or a printer is known. As this sheet post-processing device, for example, by opening the fence of the jogger stack unit, the sheet transported from the image forming apparatus is dropped and stacked on the stacking tray by stacking the sheet bundle stapled by the staple unit. There is a type in which a next sheet is stacked and discharged by a sheet conveying unit on a sheet bundle and a next sheet bundle is formed by a jogger stack unit (Patent Document 1).

JP-A-8-225227

  As described above, the sheet conveyed from the multifunction peripheral device, the image forming apparatus such as a copying machine or a printer is rarely shifted in an oblique direction. These causes are mainly due to the gap in the paper cassette on the image forming apparatus side, the imbalance of the applied pressure due to the wear of the paper pick-up roller, the transport rollers and transport guide plates in the transport path. The influence by wear is raised.

  Therefore, in the sheet post-processing apparatus, it is necessary to correct correctly the sheet conveyed in such an oblique direction. For example, when hole punching is performed in the paper post-processing apparatus, the hole position accuracy of the hole punch is affected. In other words, hole punching is performed for each sheet in the sheet post-processing apparatus. However, if a sheet shifted in an oblique direction is received as it is from the image forming apparatus side and punched, variations in hole positions occur. In some cases, the appearance of the bookbinding state when the sheet is bundled is deteriorated, or the minimum hole size required for filing cannot be obtained.

  Further, for example, it affects the paper alignment accuracy in the paper post-processing apparatus. That is, in the paper post-processing apparatus, paper is aligned by a jogger for each sheet for stapling, but the paper that is conveyed in an oblique direction with respect to one jogger operation is normally aligned properly. The jogger operation is performed several times without being aligned, and this also has an effect on noise and productivity.

  In addition, for example, productivity is affected in the sheet post-processing apparatus. That is, there are many specifications that the sheet conveyed from the image forming apparatus is generally conveyed based on the sheet center. For this reason, in the paper post-processing apparatus, when stapling, the stapler is moved for each paper size, or the paper alignment reference is provided at another position (one position is constant or a plurality of positions). However, as the means for moving the stapler for each paper size, the latter is often used because it is difficult to properly detect the position of the stapler and the curl holding position. Shifting to another position requires travel time and unavoidably affects productivity.

  The present invention has been made in view of such circumstances, and has a simple structure, corrects that the paper is transported out of alignment, and improves the stipple accuracy and paper alignment accuracy, thereby improving productivity. It is an object of the present invention to provide a sheet post-processing apparatus that enables this.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is a sheet conveying means for conveying a sheet on which an image is formed;
An alignment unit that shifts and conveys the sheet conveyed by the sheet conveying unit to one side, and
The aligning means includes
A conveyance direction correction unit in which a conveyance roller that conveys a sheet can turn around a pivot;
The sheet post-processing apparatus includes an operation unit that rotates the conveyance roller for a predetermined time to convey the sheet while shifting the sheet.

The invention according to claim 2 is characterized in that the aligning means includes:
It has a reference guide that regulates the paper transport direction to the reference position,
The paper post-processing apparatus according to claim 1, wherein the paper post-processing apparatus according to claim 1, wherein the paper is conveyed while being swung by rotating the transport roller and contacting the reference guide.

In the invention according to claim 3, a plurality of drive shafts extending in a direction orthogonal to the paper transport direction are arranged in parallel along the paper transport direction,
The transport roller is rotatable by the plurality of drive shafts;
The transport roller provided on the drive shaft on the front side in the transport direction of the paper can be turned,
3. The sheet post-processing apparatus according to claim 1, wherein the conveyance roller provided on the drive shaft on the rear side in the sheet conveyance direction is made unrotatable. 4.

In the invention according to claim 4, a plurality of drive shafts extending in a direction orthogonal to the paper transport direction are arranged in parallel along the paper transport direction,
The transport roller is rotatable by the plurality of drive shafts;
The transport rollers provided on the front and rear drive shafts in the transport direction of the paper can be turned,
The number of the transport rollers provided on the drive shaft on the front side in the transport direction of the paper,
3. The sheet post-processing apparatus according to claim 1, wherein the number is greater than the number of the conveyance rollers provided on the drive shaft on the rear side in the sheet conveyance direction.

The invention according to claim 5 includes a sheet detection sensor for detecting the sheet to be conveyed,
5. The rear side of a sheet according to claim 1, wherein the sheet is conveyed while being shifted by turning the conveying roller for a predetermined time based on sheet detection information from the sheet detection sensor. It is a processing device.

  With the above configuration, the present invention has the following effects.

  According to the first to fifth aspects of the present invention, the conveyance roller is rotated for a predetermined time to convey the paper while shifting it, and it is corrected that it is conveyed in an oblique direction with a simple structure. Improve productivity by improving paper alignment accuracy.

FIG. 2 is a diagram illustrating a state in which a sheet post-processing device is coupled to an image forming apparatus such as a copier. It is a side view of a paper post-processing apparatus. It is a top view of a paper post-processing apparatus. It is a schematic perspective view of an alignment part. It is a disassembled perspective view of an alignment part. It is a top view which shows rotation of a conveyance roller. FIG. 6 is a plan view for correcting that a sheet is conveyed while being shifted. It is a top view which correct | amends that the paper of other embodiment is shifted and conveyed.

  Hereinafter, embodiments of the sheet post-processing apparatus of the present invention will be described. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

(Configuration of paper post-processing device)
FIG. 1 is a diagram illustrating a state in which a sheet post-processing apparatus is coupled to an image forming apparatus such as a copying machine. In the image forming apparatus 1 such as a copier, a printer, or a multifunction machine, a paper post-processing device 102 is installed so as to be detachable. The paper post-processing device 102 includes a transport unit 101 that transports paper, A compile unit 104 and a stacker tray 103 configured below the compile unit 104 are included. The transport unit 101 includes a paper transport unit A that transports the paper discharged from the image forming apparatus 1. The paper transport unit A includes a roller, and if the paper is transported from the image forming apparatus 1, the transport The sheets to be fed are stacked in the compilation unit 104 through rollers and then post-processed by the stapler 107, and the post-processed sheet bundle is discharged to the stacker tray 103.

  The compiling unit 104 includes a jogger / stack means B, an ejector 106, and the like. The jogger / stack means B supports the conveyed paper and stacks the paper in the width direction. In addition, an additional device such as a stapler 107 that can post-process the sheet bundle loaded on the compilation unit 104 is installed at the lower end of the compilation unit 104. Further, the conveying path of the conveying unit 101 is provided with an aligning unit C, and the aligning unit C shifts and conveys the sheet conveyed by the sheet conveying unit A to one side.

(Composition of jogger stack means and alignment means)
2 is a side view of the sheet post-processing apparatus, FIG. 3 is a plan view of the sheet post-processing apparatus, FIG. 4 is a schematic perspective view of the aligning section, FIG. 5 is an exploded perspective view of the aligning section, and FIG. FIGS. 7A and 7B are plan views for correcting that the sheet is conveyed while being displaced, and FIG. 8 is a plan view for correcting that the sheet is conveyed while being shifted.

[Configuration of jogger stack means]
The conveyance path of the conveyance unit 101 includes a lower conveyance guide 50 and an upper conveyance guide 51. On the lower conveyance guide 50 side, a conveyance roller 52 is rotatably provided by a drive shaft 53, and on the upper conveyance guide 51 side, a free roller 54 is rotatably provided by a support shaft 55, and the drive shaft 53 is driven. As a result, the conveying roller 52 is rotated, and the sheet is conveyed by the conveying roller 52 and the free roller 54 and is sent to the jogger / stacking means B.

  The jogger stacking means B is configured to support the transported paper and stack the paper in the width direction, and includes a base tray 11 on which the paper is stacked and a pair of joggers 12 and 13. In particular, one jogger 13 selected from the pair of joggers 12 and 13 functions as a fixed jogger, and the other jogger 12 functions as a drive jogger. The drive jogger 12 is perpendicular to the direction in which the paper is transported. It is configured so that the interval can be adjusted.

[Configuration of alignment means]
The aligning unit C is configured to shift and convey the sheet conveyed by the sheet conveying unit A to one side. The aligning unit C includes the reference guide 10, the conveyance direction correcting unit 20, the operating unit 30, Have

  As shown in FIG. 3, the reference guide 10 is disposed along the conveyance path on one side of the conveyance path, and is a position corresponding to the stapler 107. The reference guide 10 regulates the sheet conveyance direction to the reference position. . As shown in FIGS. 4 to 6, the conveyance direction correction unit 20 fixes the pivot 21 to the drive shaft 53, and the conveyance roller 52 that conveys the paper rotates around the pivot 21 via the left and right roller hubs 22a and 22b. It is provided as possible. The left and right roller hubs 22a and 22b are formed in different shapes, and are configured to hold the transport roller 52 by assembling the left and right roller hubs 22a and 22b. The engaging boss 22a1 formed on the roller hub 22a is engaged with the engaging groove 21a formed on the pivot 21, and the rotational force of the drive shaft 53 is applied to the conveying roller 52 via the pivot 21 and the left and right roller hubs 22a and 22b. The conveying roller 52 is configured to be able to turn around the pivot 21 as a fulcrum.

  The drive shaft 53 extends in a direction orthogonal to the paper transport direction, and the drive shaft 53 is arranged in parallel at a plurality of two locations along the paper transport direction, and one location is the center side of the transport path. One place is the carry-out side. The drive shaft 53 on the center side is provided with the transport direction correction unit 20 at two locations, and the transport direction correction unit 20 is provided at four locations on the drive shaft 53 on the carry-out side. The actuating unit 30 includes a pair of actuating plates 31 arranged to be movable in the axial direction of the central drive shaft 53 and the unloading drive shaft 53, a pinion 32 that meshes with a rack 31a of the pair of actuating plates 31, and a pinion A drive motor 33 for driving 32 is provided. The pair of operation plates 31 are provided with roller holders 34 corresponding to the conveyance direction correction unit 20, and the left and right roller hubs 22 are assembled to the roller holders 34.

  The drive motor 33 drives the pinion 32 to move the pair of operation plates 31 in the opposite directions, and the conveyance direction correction unit 20 turns the conveyance roller 52 around the pivot 22 using the roller holder 34 via the roller holder 34. The operation plate 31 is provided with a home sensor S1 of the transport roller 52. A position where the transport roller 52 does not turn is set as a home position, and this home position information is sent to the control means 40.

  The control unit 40 controls the driving unit 41 to rotate the conveying roller 52 via the driving shaft 53 and convey the sheet. Paper detection information is sent from the paper detection sensor S2 to the control means 40. The control means 40 controls the drive motor 33 based on the paper detection information, and the conveyance direction correction unit 20 turns the conveyance roller 52 for a predetermined time. Then, the sheet is shifted and conveyed while being in contact with the reference guide 10.

  As described above, after the detection by the paper detection sensor S2, the transport roller 52 is turned for a predetermined time, and the paper is shifted and transported while being applied to the reference guide 10, thereby making it possible to align the punch hole positions of the paper, and to keep the staple. Accuracy is improved. Further, since the paper is shifted by a predetermined distance and stored in the base tray 11 of the compilation unit 104 during the conveyance of the paper, the movement distance of the driving jogger 12 can be minimized, and the paper alignment time can be shortened. Also improves.

  A plurality of drive shafts 53 extending in a direction orthogonal to the paper transport direction are arranged in parallel along the paper transport direction, and the transport rollers 52 can be rotated by the plurality of drive shafts 53, so that the transported paper Can be conveyed while being reliably shifted to the reference guide 10.

  Further, the number of the transport rollers 52 of the drive shaft 53 disposed on the front side along the sheet transport direction may be the same as the number of the transport rollers 52 of the drive shaft 53 disposed on the rear side along the sheet transport direction. However, as shown in FIG. 7, by at least increasing the force, a large shifting force acts on the front side in the sheet conveyance direction, and the conveyed sheet can be reliably shifted and conveyed while being applied to the reference guide 10. it can.

  Further, as shown in FIG. 8, the conveyance roller 52 provided on the drive shaft 53 on the front side in the paper conveyance direction can be turned, and the conveyance roller 52 provided on the drive shaft 53 on the rear side in the paper conveyance direction can be turned. Well, with a simple configuration using the transport roller 52 only on the front side, the transported sheet can be transported while being reliably shifted to the reference guide 10.

  The present invention is applicable to a paper post-processing apparatus connected to an image forming apparatus such as a copying machine or a printer, and corrects that the paper is conveyed in an oblique direction with a simple structure, stippling accuracy, and paper alignment. Productivity can be improved by improving accuracy.

A Paper conveying means B Jogger stacking means C Alignment means 1 Image forming apparatus 10 Reference guide 11 Base trays 12 and 13 A pair of joggers 20 Conveying direction correction portion 21 Pivot 22 Roller hub 30 Actuating portion 31 Acting plate 32 Pinion 33 Drive motor 34 Roller Holder 40 Control means 41 Drive means 50 Lower transport guide 51 Upper transport guide 52 Transport roller 53 Drive shaft 54 Free roller 55 Support shaft 102 Paper post-processing device

Claims (5)

Paper transport means for transporting paper on which an image is formed;
An alignment unit that shifts and conveys the sheet conveyed by the sheet conveying unit to one side, and
The aligning means includes
A conveyance direction correction unit in which a conveyance roller that conveys a sheet can turn around a pivot;
A paper post-processing apparatus, comprising: an operating unit that rotates the transport roller for a predetermined time to transport the paper while shifting the paper. The aligning means includes
It has a reference guide that regulates the paper transport direction to the reference position,
The paper post-processing apparatus according to claim 1, wherein the paper roller is rotated to shift the paper so that the paper is conveyed while being in contact with the reference guide. A plurality of drive shafts extending in a direction orthogonal to the paper transport direction are arranged in parallel along the paper transport direction,
The transport roller is rotatable by the plurality of drive shafts;
The transport roller provided on the drive shaft on the front side in the transport direction of the paper can be turned,
The sheet post-processing apparatus according to claim 1, wherein the conveyance roller provided on the drive shaft on the rear side in the sheet conveyance direction is made unrotatable. A plurality of drive shafts extending in a direction orthogonal to the paper transport direction are arranged in parallel along the paper transport direction,
The transport roller is rotatable by the plurality of drive shafts;
The transport rollers provided on the front and rear drive shafts in the transport direction of the paper can be turned,
The number of the transport rollers provided on the drive shaft on the front side in the transport direction of the paper,
3. The sheet post-processing apparatus according to claim 1, wherein the number of the conveying rollers provided on the drive shaft on the rear side in the sheet conveying direction is at least larger than the number of the conveying rollers. It has a paper detection sensor that detects the paper being transported,
5. The rear side of a sheet according to claim 1, wherein the sheet is conveyed while being shifted by turning the conveying roller for a predetermined time based on sheet detection information from the sheet detection sensor. Processing equipment.