JP2009298562A - Paper processing device, sheet post-processing device, image processing device, image forming device and sheet transport device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a time from the occurrence of an abnormality to a processing start by a user when the abnormality occurs while additional folding processing is applied to paper. <P>SOLUTION: While the additional folding processing for a paper bundle S by a roller 24 of an additional folding means 22 is conducted, if the occurrence of the abnormality in a system (the device) is detected, the additional folding means 22 is moved to a retreat position faster than a normal additional folding process speed in the normal state of the device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes a sheet processing apparatus that includes a folding unit that further folds a folded portion of a folded sheet bundle and performs a folding process on a discharged sheet, and the sheet processing apparatus. The present invention relates to a sheet post-processing apparatus, an image processing apparatus, an image forming apparatus, and a sheet conveying apparatus.

As described in Patent Document 1, a folding roller that folds a sheet while passing through a nip of a pair of rollers, a folding roller that further folds the folded portion of the folded sheet bundle, In a paper processing apparatus provided with a drive unit that moves the folding roller in a direction orthogonal to the paper conveyance direction, when an abnormality occurs during operation of the folding roller, the folding roller is moved to the home position, There is a paper processing apparatus configured to display a message prompting jam processing.
Japanese Patent No. 3732812

  According to the configuration of Patent Document 1, it is possible to reliably perform jam processing when folding is increased, and it is possible to prevent damage to the apparatus and reduce downtime of the entire apparatus. Since the additional roller is always moved to the home position, the user has to wait until the movement is completed, and it takes time to start the work.

  An object of the present invention is to solve the problems of the prior art and to reduce the time from occurrence of an abnormality to the start of processing by a user when an abnormality occurs in the process of performing folding processing on a sheet. It is an object of the present invention to provide a sheet processing apparatus and a sheet post-processing apparatus, an image processing apparatus, an image forming apparatus, and a sheet conveying apparatus equipped with the sheet processing apparatus.

  In order to achieve the above object, according to the first aspect of the present invention, the folding roller that folds the sheet while passing through the nip of the pair of rollers, and the folding portion of the folded sheet bundle are further folded. In a sheet processing apparatus that performs folding processing on a sheet by moving the folding-increasing means and the folding-increasing means in a direction substantially perpendicular to the sheet conveying direction, the operation of the folding-increasing means is performed when an apparatus abnormality occurs. It is characterized by comprising control means for continuing the operation speed of the folding means at the time of continuation faster than the operation speed at the time of normal operation of the apparatus. By moving the folding means to the retracted position at a speed faster than the normal operation at the time, the time until the user can start jam processing is shortened.

  The invention according to claim 2 is the paper processing apparatus according to claim 1, wherein the folding means is configured to perform a folding operation only in the forward path or in the forward path, and when an apparatus abnormality occurs during the forward path operation, When the position of the folding means does not reach the center position of the paper, the folding means is returned to the folding start position. With this configuration, the retraction direction depends on the position of the folding means when an abnormality occurs. Thus, the folding means can be retracted and moved at the shortest distance.

  According to a third aspect of the present invention, in the sheet processing apparatus according to the first aspect, when the folding means performs a folding operation only in the forward path or in the forward path, and an apparatus abnormality occurs during the forward path operation, When the position of the folding means has reached the center position of the sheet, the folding means is operated to the end position after folding. With this configuration, the folding means is retracted according to the position of the folding means when an abnormality occurs. By determining the direction, the folding means can be retracted at the shortest distance.

  According to a fourth aspect of the present invention, in the paper processing apparatus according to the third aspect, when the number of sheets is large, even when the position of the additional folding means reaches the central position of the paper, the folding additional means is started to be folded. With this configuration, when the number of sheets is large, the folding load means has a large movement load, and therefore, when the speed is faster than the normal operation, the folding means may become inoperable. By returning to the route where the folding process has been completed, it is possible to move quickly along the route with less load.

  According to a fifth aspect of the present invention, in the paper processing apparatus according to the third aspect, when the thickness of the paper is thick, even when the position of the additional folding means reaches the central position of the paper, the folding means starts to be folded. This configuration is characterized by returning to the position. With this configuration, when the paper is thick, the folding load means has a large moving load, so that the folding means may become inoperable when the speed is higher than the normal operation. However, by returning to the route that has been subjected to the folding process, the route with less load can be moved quickly.

  According to a sixth aspect of the present invention, in the paper processing apparatus according to the fourth aspect, even when the number of sheets is large and the position of the folding means reaches the central position of the sheet, the operation speed when the apparatus is normal If the time to move to the end position is shorter than the time required for the normal operation of the device to be shorter than the time required to increase the folding means and return to the start position, the end of the folding will be completed at the normal operation speed of the device. It is characterized by operating to the position, and by this configuration, if the folding means reaches the center at the time of abnormality, it is more until the operation is completed if it proceeds as it is at the normal speed when the device is normal rather than returning at a high speed In some cases, it is possible to shorten the time.

  According to a seventh aspect of the present invention, in the paper processing apparatus according to the fifth aspect, even when the thickness of the sheet is large and the position of the folding means reaches the center position of the sheet, the operation of the apparatus is normal. If the time required to increase the folding at the normal speed of the device and the time to move to the end position is shorter than the time required to increase the folding means and return to the starting position faster than the speed, the folding speed will increase at the normal operating speed of the device. It is characterized by operating to the end position, and with this configuration, when the folding means reaches the center at the time of abnormality, the operation is completed by proceeding as it is at the normal speed when the device is normal rather than returning at a high speed It may be possible to shorten the time until.

  The invention according to claim 8 is the sheet processing apparatus according to claim 1, wherein the folding means performs a folding operation only in the forward path or in the forward path, and when an apparatus abnormality occurs during the backward path operation, When the position of the folding means does not reach the center position of the paper, the folding means is returned to the folding start position. With this configuration, the retraction direction depends on the position of the folding means when an abnormality occurs. Thus, the folding means can be retracted and moved at the shortest distance.

  According to a ninth aspect of the present invention, in the sheet processing apparatus according to the first aspect, when the folding means performs a folding operation only in the forward path or in the forward path, and an apparatus abnormality occurs during the backward path operation, When the position of the folding means has reached the center position of the sheet, the folding means is operated to the end position after folding. With this configuration, the folding means is retracted according to the position of the folding means when an abnormality occurs. By determining the direction, the folding means can be retracted at the shortest distance.

  According to a tenth aspect of the present invention, in the paper processing apparatus according to any one of the first to ninth aspects, if the operation of the folding means does not end even after a preset time has elapsed, the folding means is provided. In this configuration, it is possible to prevent further troubles caused by failure of the folding means itself.

  According to an eleventh aspect of the present invention, in the paper processing apparatus according to any one of the first to tenth aspects, the folding means can be displaced from a folding operation position to a position where the paper can be pulled out. With this configuration, even if the user pulls out the paper in the paper transport direction in order to remove the paper, the paper can be easily removed regardless of the presence of the folding increase means.

  According to a twelfth aspect of the present invention, in a sheet post-processing apparatus that performs post-processing on a sheet-shaped sheet, the sheet post-processing apparatus includes the sheet processing apparatus according to any one of the first to eleventh aspects. Even when an abnormality occurs during the folding process for the sheet, the time until the user can start jam processing can be shortened.

  According to a thirteenth aspect of the present invention, an image processing apparatus for reading an image from a document includes the paper processing apparatus according to any one of the first to eleventh aspects, whereby the image processing apparatus folds the sheet. Even when an abnormality occurs during processing, it is possible to shorten the time until the user can start jam processing.

  According to a fourteenth aspect of the present invention, in an image forming apparatus for forming an image on a sheet-like paper, the image forming apparatus includes the paper processing apparatus according to any one of the first to eleventh aspects. Even when an abnormality occurs during the folding process on the paper, it is possible to shorten the time until the user can start the jam processing.

  According to a fifteenth aspect of the present invention, in the sheet conveying apparatus that conveys a sheet-like sheet to a predetermined position, the sheet conveying apparatus includes the sheet processing apparatus according to any one of the first to eleventh aspects. Even when an abnormality occurs during the folding process, the time until the user can start jam processing can be shortened.

  According to the present invention, when an abnormality occurs in the device, the time until the user can start jam processing by moving the folding means to the retracted position at a speed faster than the normal operation when the device is normal. The working efficiency can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall configuration diagram of a sheet post-processing apparatus which is an embodiment of a sheet processing apparatus according to the present invention. The sheet post-processing apparatus 1 includes an image processing apparatus such as a copying machine, a printer, and a facsimile machine, and image formation. It is attached to the side of the device 2.

  An outline of the configuration and operation of the main part of the sheet post-processing apparatus 1 will be described. In FIG. 1, a sheet-like sheet S is sent from a sheet discharge path A of the image forming apparatus 2 to a conveyance path B of the sheet post-processing apparatus 1, and the sheet S is divided into a branch claw 3 a and a branch claw 3 b on the conveyance path B. And are discharged from the upper discharge tray path C or the straight discharge tray path D or guided to the lower transport path E. In the lower transport path E, the paper is discharged to the processing tray 8 by the transport rollers 4, 5, 6 and the staple paper discharge roller 7.

  As shown in FIG. 2A, in the processing tray 8, the sheets S sequentially discharged from the lower conveyance path E by the staple discharge roller 7 are aligned, and a plurality of sheets S to be discharged until just before the stapling. The same operation is performed.

  After a plurality of discharged sheets S are temporarily aligned on the processing tray 8, as shown in FIGS. 2B and 2C, the leading end of the sheet bundle S has a pressure roller 9 and a pressure roller 10. , And is conveyed downstream by the discharge claw 12 and the pressure roller 9 so as to pass through the path guided to the processing tray portion F by the movable guide 11.

  Thereafter, the pressure roller 9 is carried by the discharge claw 12 until the rear end of the sheet bundle S passes, and further conveyed by the upper bundle conveying roller 14 and the lower bundle conveying roller 15 to the position of FIG. At that time, the stop position of the movable rear end fence 13 is different depending on the size of the sheet bundle S in the transport direction, and is waiting. When the leading edge of the sheet bundle S comes into contact with the waiting movable rear end fence 13 and is stacked, the pressure of the lower bundle conveying roller 15 is released as shown in FIG. The rear end of the bundle S is hit to perform final alignment in the transport direction (the sheet bundle S is displaced before the paper bundle S temporarily aligned on the processing tray 8 is stacked on the movable rear end fence 13). Therefore, it is necessary to perform final alignment with the rear end tapping claw 16).

  Immediately after the alignment, final alignment in the width direction is performed by the saddle stitching upper jogger fence 17a and the saddle stitching lower jogger fence 17b, and the center is bound by the saddle stitching stapler 18.

  Here, the movable rear end fence 13 is positioned by pulse control from the movable rear end fence HP sensor 19a, and the rear end hitting claw 16 is positioned by pulse control from the rear end hitting claw HP sensor 19b.

  As shown in FIG. 3C, the saddle-stitched sheet bundle S is carried upward along with the movement of the movable rear end fence 13 while the pressurization of the lower bundle conveying roller 15 is released.

  Thereafter, as shown in FIG. 4, the vicinity of the staple portion where the sheet bundle S is bound is pushed by the folding plate 20 in a substantially right-angle direction and guided to the nip of the pair of opposed folding rollers 21. The folding roller 21 rotating in advance folds the center Sa of the sheet bundle S by conveying the sheet bundle S under pressure.

  Here, since the saddle-stitched sheet bundle S moves upward for folding processing, the sheet bundle S can be reliably conveyed only by moving the movable rear end fence 13. If an attempt is made to move it downward for folding, the movement of the movable rear end fence 13 alone is not reliable, and another means such as a transport roller is required, which complicates the configuration.

  As shown in FIGS. 1 and 5, the folded sheet bundle S is configured to reinforce folding by means of a folding increase means 22 that scans a folded portion in a direction intersecting with the conveyance direction as a second folding roller. It has become. As shown in FIG. 5, the folding means 22 is configured to apply pressure to the roller 24 by a compression spring 23, which is an elastic member, and the roller 24 moves together with the slider 25 and is guided to fold the sheet bundle S. It is configured to move while applying pressure to strengthen the folding. The slider 25 is configured to receive the driving force from the driving motor 26 via a transmission mechanism (not shown) and move the roller 24.

  The drive motor 26 is controlled in drive timing, drive speed, and the like by a drive unit 28 that is controlled by a CPU (Central Processing Unit) 27 that is a control means. The CPU 27 outputs a drive signal in response to detection signals from the movable rear end fence HP sensor 19a, rear end tapping HP sensor 19b, or other various sensors 29 provided in the apparatus.

  Here, in this embodiment, when the CPU 27 detects that an abnormality has occurred in the system (the device) during the folding process by the folding unit 22, the folding unit 22 is connected to the normal state of the apparatus. It is configured to move to a predetermined retraction position described later at a speed faster than the normal folding increase processing speed.

  By doing so, it is possible to shorten the time until the user can start the paper jam processing when any abnormality occurs, and the work efficiency can be improved.

  The operation control of the folding means 22 in this embodiment will be described with reference to the operation explanatory diagrams of the rollers 24 of the folding means 22 in FIGS.

  As shown in FIG. 6, when the position of the roller 24 of the folding means 22 does not reach the center position of the sheet bundle S when it is abnormal (detected by a position sensor not shown), the CPU 27 drives. The motor 26 is controlled to be retracted so as to return to the folding start position that is the direction of the retract arrow shown in FIG.

  Further, as shown in FIG. 7, when the position of the roller 24 of the folding means 22 in the occurrence of an abnormality passes through the moving forward path and the center position of the sheet bundle S, the folding in the direction of the retraction arrow shown in FIG. 7 is performed. Advance to the end position and retreat.

  When the number of the sheet bundles S is large or the sheet is thick, the load on the rollers 24 becomes large in order to perform the folding increase process at the increased speed as described above. Therefore, as shown in FIG. 8, even when the position of the roller 24 of the folding means 22 reaches the center position of the sheet bundle S when an abnormality occurs, the folding process shown in the arrow direction shown in FIG. Evacuate in the finished direction. As a result, the load on the roller 24 is reduced by the movement of the roller 24 on the sheet bundle S on which the folding process has been completed.

  Here, even when the number of sheets is large or the sheet is thick, if the increased speed is v1 and the normal folding speed is v0, the roller 24 is retracted by x1 in the retracting direction shown in FIG. If the time x2 / v0 for retracting the roller 24 in the retracting (2) direction in FIG. 9 is shorter than the retracting time x1 / v1, the retracting in the retracting (2) direction in FIG. 9 is performed at a normal folding speed. I will let you.

  Then, when an abnormality occurs during the return path in the folding operation, as shown in FIG. 10, when the roller 24 has not reached the center position of the sheet bundle S, it is retracted to the retracted position indicated by the arrow shown in FIG. 10. In addition, as shown in FIG. 11, when the roller 24 has reached the center position of the sheet bundle S, the roller 24 is retracted to the retracted position in the arrow direction shown in FIG.

  If the retreating operation does not end even after a predetermined time has elapsed (detected by a position sensor not shown), the CPU 27 determines that the folding means 22 itself is inoperable and increases the folding. A signal is output so as to stop the operation of the means 22.

  By the way, when the operation is stopped, the roller 24 of the folding means 22 is in a pressurized state, as shown in FIG. Since the sheet bundle S is arranged in a direction perpendicular to the conveying direction of S, when the sheet bundle S is manually removed, the presence of the rollers 24 becomes a resistance, which makes it difficult for the user to remove the sheet.

  Therefore, in this embodiment, as shown in FIG. 12B, the roller 24 is configured to be rotatable about the central axis m in the direction perpendicular to the sheet as the rotation center, and the folding operation position to the sheet bundle S is increased. The sheet bundle S can be displaced to a position where the sheet bundle S can be pulled out.

  Accordingly, as shown in FIG. 12C, when the user pulls out the sheet bundle S in the transport direction, the roller 24 of the folding means 22 rotates to change the direction in the paper transport direction, thereby removing the paper. Is improved.

  The operation control of the folding means 22 in this embodiment will be described collectively with reference to the flowchart of FIG.

  When the CPU 27 detects that some abnormality has occurred (S1), the drive motor 26 is accelerated (S2), and the folding means 22 is operated in the next determination step.

  If the position of the roller 24 of the folding means 22 does not reach the center position of the sheet bundle S when an abnormality occurs (NO in S3), the CPU 27 controls the rotation of the drive motor 26 to start folding the roller 24. Are evacuated so as to return at a high speed (S4).

  Further, when the abnormality occurs, the position of the roller 24 of the folding means 22 passes through the central position of the sheet bundle S (YES in S3), and the number of sheets and the sheet thickness of the sheet bundle S are equal to or less than predetermined values. In some cases (YES in S5, YES in S6), the rollers 24 are folded and advanced to the end position at a high speed and retracted (S7).

  However, when the number of sheets in the sheet bundle S and the sheet thickness are equal to or less than the predetermined values in the above step (NO in S5, NO in S6), the speed is usually increased rather than increasing as described in FIG. When the speed reaches the retracted position faster (S8), the drive motor 26 is controlled so as to change from the accelerated state to the normal speed (S9).

  In the above step, if the retracting operation is not completed because the roller 24 of the folding means 22 does not reach the predetermined position even after a predetermined time has elapsed (NO in S10), the folding means 22 itself cannot be operated. And the operation of the folding means 22 is stopped (S11).

  The sheet processing apparatus according to the present embodiment includes a sheet post-processing apparatus that performs post-processing on a sheet-shaped sheet, an image processing apparatus that reads an image from a document, and an image forming apparatus that forms an image on a sheet-shaped sheet. Alternatively, by installing the sheet-like sheet in a sheet conveying device that conveys the sheet to a predetermined position, the sheet can be folded and the jam process can be started even if an abnormality occurs during the process. This is effective because it can shorten the time required until.

  The present invention relates to a sheet processing apparatus configured to perform sheet post-processing including sheet folding processing, a sheet post-processing apparatus equipped with the sheet processing apparatus, an image processing apparatus, an image forming apparatus, a sheet conveying apparatus, and the like. It is effective when used in an apparatus that handles paper.

1 is an overall configuration diagram of a sheet post-processing apparatus that is an embodiment of a paper processing apparatus according to the present invention; (A)-(c) is explanatory drawing of the principal part regarding the paper conveyance operation | movement in this embodiment. (A)-(c) is explanatory drawing of the principal part regarding the paper conveyance operation | movement in this embodiment. Explanatory drawing of the principal part regarding the paper folding operation in this embodiment Configuration diagram of main part of sheet folding portion in this embodiment Explanatory drawing of the operation control of the folding means in this embodiment Explanatory drawing of the operation control of the folding means in this embodiment Explanatory drawing of the operation control of the folding means in this embodiment Explanatory drawing of the operation control of the folding means in this embodiment Explanatory drawing of the operation control of the folding means in this embodiment Explanatory drawing of the operation control of the folding means in this embodiment (A)-(c) is explanatory drawing of operation | movement at the time of sheet | seat extraction of the folding means in this embodiment. Flowchart relating to operation control of folding means in the present embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet post-processing apparatus 2 Image forming apparatus 20 Folding plate 21 Folding roller 22 Folding means 24 Roller 25 Slider 26 Drive motor 27 CPU (central processing unit)
28 Drive part S Paper bundle

Claims (15)

A folding roller that folds the sheet while passing through the nip of the pair of rollers, a folding unit that further folds the folded part of the folded sheet bundle, and the folding unit with respect to the sheet conveying direction In a paper processing apparatus that moves in a substantially orthogonal direction and performs folding processing on paper,
A sheet comprising control means for continuing the operation of the folding-increasing means when an apparatus abnormality occurs, and for causing the operating speed of the folding-increasing means to be higher than the operating speed when the apparatus is normal. Processing equipment.   The fold-increasing means is configured to perform a fold-in operation only in the forward path or in the forward path, and when the apparatus abnormality occurs during the forward path operation, when the position of the fold-in increasing means has not reached the sheet center position, The sheet processing apparatus according to claim 1, wherein the folding means is returned to a folding start position.   In the configuration in which the folding means performs a folding operation only in the forward path or in the forward path, and the apparatus abnormality occurs during the forward path operation, when the position of the folding means has reached the sheet center position, 2. A sheet processing apparatus according to claim 1, wherein the folding means is operated to a folding end position.   4. The paper processing apparatus according to claim 3, wherein when the number of sheets is large, the folding means is returned to the folding start position even if the position of the additional folding means reaches the center position of the paper.   4. The paper processing apparatus according to claim 3, wherein when the paper thickness is thick, the folding means is returned to the folding start position even when the position of the additional folding means reaches the center position of the paper.   Even when the number of sheets is large and the position of the folding-increasing means has reached the center of the sheet, the time required to return the folding-increasing means to the folding start position after being faster than the normal operation speed of the apparatus. 5. The sheet processing apparatus according to claim 4, wherein when the time for operating the folding end position at the normal operation speed of the apparatus is shorter, the sheet processing apparatus operates at the folding end position at the normal operation speed. .   Even when the paper is thick and the position of the folding means reaches the paper center position, the time required to return the folding means to the folding start position faster than the normal operation speed of the apparatus. 6. The sheet processing according to claim 5, wherein when the operation time to the folding end position is shorter than the operation speed when the apparatus is normal, the sheet processing is performed to the folding end position at the operation speed when the apparatus is normal. apparatus.   The fold-increasing means is configured to perform a fold-up operation only in the forward path or in the forward path, and when the apparatus abnormality occurs during the backward path operation, when the position of the fold-increasing means has not reached the sheet center position, The sheet processing apparatus according to claim 1, wherein the folding means is returned to a folding start position.   The fold-increasing means is configured to perform a fold-in operation only in the outward path or in the outward path, and when the apparatus abnormality occurs during the inward path operation, when the position of the fold-increasing means has reached the sheet center position, 2. A sheet processing apparatus according to claim 1, wherein the folding means is operated to a folding end position.   The sheet processing according to any one of claims 1 to 9, wherein if the operation of the folding increase means does not end even after a preset time has elapsed, the operation of the folding addition means is stopped. apparatus.   The sheet processing apparatus according to claim 1, wherein the folding unit is displaceable from a folding operation position to a position where the sheet can be pulled out.   A sheet post-processing apparatus that performs post-processing on sheet-like paper, comprising the paper processing apparatus according to claim 1.   An image processing apparatus for reading an image from a document, comprising the sheet processing apparatus according to claim 1.   An image forming apparatus for forming an image on a sheet-like paper, comprising the paper processing device according to claim 1.   A sheet conveying apparatus for conveying a sheet-like sheet to a predetermined position, comprising the sheet processing apparatus according to claim 1.

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