JP2015117084A5 - - Google Patents

Description

Sheet processing apparatus and image forming system using the same

The present invention relates to a sheet processing apparatus for processing a sheet with an image formed, an improvement of a punch mechanism.

Generally, this kind of sheet processing apparatus is known as an apparatus for storing a stack tray after processing the sheet connected to the image formed on the sheet discharge outlet of the image forming apparatus is temporarily held, processing mechanism There are known a binding mechanism for binding a bundle of stacked sheets, a punch mechanism for punching punch holes, a folding processing mechanism for folding processing, a stamping mechanism for stamping, and the like.

  For example, in Japanese Patent Laid-Open No. 2003-260260, sheets formed on an image connected to a paper discharge port of an image forming apparatus are guided from a carry-in path to a processing tray, collected in a bundle and bound, and then stored in a downstream stack tray. An apparatus is disclosed. In this document, a punch unit for punching punch holes in a sheet is arranged in the carry-in path, and after the sheet sent to the carry-in port is temporarily stopped and punched, the paper discharge opening is fed to the processing tray or stack tray. A guiding punch mechanism has been proposed.

Further, sheet processing apparatus sheet processing (binding processing) which is carried from the upstream side in the same time as the applied manual binding mechanism for binding processing of the sheet bundle the operator has set the manual setting unit provided in the outer casing For example, Patent Document 2 proposes a device equipped with the above.

Japanese Patent No. 5010526 JP 2005-096392 A

As mentioned above, processing device stored on the stack tray after the binding processing to guide the processing unit binding the sheet on which an image is formed by an image forming apparatus are already known. A unit in which a punch unit is arranged in a sheet carry-in path with such an apparatus, and a punch hole is punched in a sheet guided to a binding processing unit is also known from the above-mentioned Patent Document 1 or the like. Further, a mechanism for binding a sheet bundle set by providing a manual setting unit for inserting the sheet bundle into the outer casing is also known from Patent Document 2 and the like.

The present invention has a task and processing for perforating punch holes in the sheet over preparative, to constitute a sheet processing apparatus capable processing is that processes stapled sheet bundle to the compact in degrees Tsu isolation portion.

In order to solve the above-described problems, a sheet processing apparatus according to the present invention has a setting unit in which a sheet bundle from the outside of the apparatus is set, a conveyance path for conveying a sheet, and a position different from the setting unit. And a stacking unit that stacks the sheets transported from the transport path, a sheet bundle that is set in the set unit, and a binding unit that binds the sheet bundle stacked on the stacking unit, and is disposed in the transport path. A punching means for punching a sheet, and the set portion is disposed so as to overlap the punching means in a direction intersecting a transport direction in which the sheet is transported in the transport path. It shall be the.

The present invention can make the apparatus compact .

1 is an explanatory diagram of an overall configuration of an image forming system according to the present invention. FIG. 2 is an explanatory diagram of an overall configuration of a sheet post-processing apparatus in the image forming system of FIG. 1. FIG. 3 is an enlarged view of a main part of the path of the apparatus of FIG. 2. FIG. 3 is a perspective view of a manual feed setting unit in the sheet post-processing apparatus of FIG. 2. The whole perspective view of the punch unit in the apparatus of FIG. Explanatory drawing of the shift mechanism of a punch unit. FIG. 7 is a state diagram in which the punch unit is moved from the state of FIG. 6 to the apparatus front side. The movement trajectory of the staple unit and eco-binding means. FIG. 3 is an explanatory diagram showing an arrangement relationship between an alignment position and a staple unit in the apparatus of FIG. 2. Explanatory drawing of the differential means of the binding means in the apparatus of FIG. Explanatory drawing of the raising / lowering mechanism of a stack tray in the apparatus of FIG. FIG. 6 is an operation explanatory diagram of the sheet bundle carrying-out means, where (a) shows a state where the sheet bundle is located at the binding position on the processing tray, and (b) shows a state during the transfer of the sheet bundle from the processing position to the downstream side. (C) shows a state immediately before the sheet bundle is carried out to the downstream stack tray. The structure of the binding means which concerns on this invention is shown, (a) is a structure explanatory drawing of a staple unit, (b) is a structure explanatory drawing of an eco-binding unit. The block diagram which shows the control structure in the apparatus of FIG. FIG. 2 is a flowchart of a binding process paper discharge operation in the apparatus of FIG. 1. The operation | movement flowchart of a jog division discharge mode. FIG. 2 shows a flow in a paper discharge mode in the apparatus of FIG. 1, (a) shows a bookbinding processing paper discharge mode, and (b) shows an operation flow in a printout paper discharge mode.

[Image forming apparatus]
An image forming apparatus A in the image forming system shown in FIG. 1 will be described. The illustrated image forming apparatus A shows an electrostatic printing mechanism, and includes an image forming unit A1, a scanner unit A2, and a feeder unit A3. The apparatus housing 1 is provided with installation legs 25 that are installed on an installation surface (for example, a floor surface). In the apparatus housing, a paper feed unit 2, an image forming unit 3, a paper discharge unit 4, and a data processing unit 5 are incorporated.

  The sheet feeding unit 2 includes cassette mechanisms 2 a to 2 c that store sheets of a plurality of sizes for image formation. The sheet feeding unit 2 feeds a sheet having a size designated by the main body control unit 90 to the sheet feeding path 6. For this reason, a plurality of cassettes 2a to 2c are detachably disposed in the apparatus housing 1, and each cassette has a built-in separation mechanism for separating the internal sheets one by one and a sheet feeding mechanism for feeding out the sheets. The paper feed path 6 is provided with a transport roller 7 for feeding sheets supplied from the plurality of cassettes 2a to 2c to the downstream side, and a registration roller pair 8 for aligning the leading edges of the sheets at the path end. .

  Note that a large-capacity cassette 2d and a manual feed tray 2e are connected to the paper feed path 6 described above, and the large-capacity cassette 2d is configured by an optional unit that stores a large amount of sheets to be consumed. A special sheet such as a cardboard sheet, a coating sheet, or a film sheet, which is difficult to separate and feed, can be supplied.

  The image forming unit 3 shows an electrostatic printing mechanism as an example, and includes a photosensitive member 9 (drum, belt), a light emitter 10 that emits an optical beam to the photosensitive member, a developing device 11 (developer), and a cleaner (not used). Is disposed around the rotating photoreceptor. The illustrated one shows a monochrome printing mechanism, in which a latent image is optically formed on the photosensitive drum 9 by a light emitter, and toner ink is attached to the latent image by a developing device 11.

  A sheet is fed from the paper feed path 6 to the image forming unit 3 in accordance with the timing of image formation on the photosensitive member 9, and the image is transferred onto the sheet by the transfer charger 12. ) Fix at 13. A paper discharge roller 15 and a paper discharge port 16 are arranged in the paper discharge path 14 and convey the sheet to a sheet post-processing apparatus B described later.

  The above-described scanner unit A2 includes a platen 17 on which an image original is placed, a carriage 18 that reciprocates along the platen, a light source mounted on the carriage, and reflected light from the original on the platen to the photoelectric conversion means 19. It is composed of a reducing optical system 20 (a combination of a mirror and a lens) for guiding. 21 is a second platen (traveling platen), and reads the image of the sheet sent from the feeder unit A3 by the carriage 18 and the reduction optical system 20 described above. Although the photoelectric conversion means 19 has undergone photoelectric conversion, the image data is electrically transferred to the image forming unit 3.

  The feeder unit A3 includes a paper feed tray 22, a paper feed path 23 that guides a sheet fed from the paper feed tray to the travel platen 21, and a paper discharge tray 24 that stores a document read on the platen.

  The image forming apparatus A is not limited to the above-described mechanism, and can employ a printing mechanism such as an offset printing mechanism, an inkjet printing mechanism, or an ink ribbon transfer printing mechanism (such as thermal transfer ribbon printing or sublimation ribbon printing).

[Sheet post-processing equipment]
The sheet post-processing device B is a device for post-processing the sheet carried out from the paper discharge port 16 of the image forming apparatus A. (1) A function for stacking and storing the image-formed sheets (first and third processing units B1) , B3; printout mode), (2) a function of storing the image-formed sheets separately (third processing unit B3; jog sorting mode), and (3) collecting and stacking the image-formed sheets A function for binding processing (first processing unit B1; binding processing mode), and (4) a function for aligning and binding sheets on which images have been formed and then folding and binding (second processing unit B2; bookbinding) Processing mode).

  In the present invention, the sheet post-processing apparatus B does not have to have all the functions described above, and may be appropriately configured according to the apparatus specifications (design specifications). In this case as well, a processing unit (first processing unit B1) for aligning and stacking sheets, and first and second binding means (a needle binding unit 47 and a needleless binding unit 51 described later) are provided in the processing unit, There is a need for a stack configuration that is stored after the binding process is performed by the selected binding means.

  FIG. 2 shows a detailed configuration of the sheet post-processing apparatus B. The sheet post-processing apparatus B performs a post-processing on a carry-in port 26 connected to the paper discharge port 16 of the image forming apparatus A and a sheet loaded from the carry-in port (a first stack tray 49 and a second stack tray 61 described later). In the third stack tray 71).

  The apparatus shown in the figure transfers sheets sent to the sheet carry-in path 28 from the first processing unit B1 to the first stack tray 49 (hereinafter referred to as “first tray”), and from the second processing unit B2 to the second stack tray 61 ( The sheet is transferred from the third processing unit B3 to the third stack tray 71 (hereinafter referred to as “third tray”).

  The first processing unit B1 is disposed at a path exit (sheet discharge port) 35 of the sheet carry-in path 28, and after sequentially stacking and stacking the sequentially fed sheets, the first tray (first storage unit; hereinafter) The same). The second processing unit B2 is disposed at a path exit 62 (second switchback path end described later) branched from the sheet carry-in path 28, and after sequentially aligning and stacking sequentially fed sheets, the folding process is performed. It is stored in two trays (second storage part; the same applies hereinafter) 61. The third processing unit B3 is incorporated in the sheet carry-in path 28, and in the direction (the direction orthogonal to the present embodiment) intersecting the conveyance direction (the conveyance direction of the sheet conveyed to the sheet carry-in path 28). After sorting by offset by a predetermined amount, it is stored in a third tray (third storage portion; the same applies hereinafter) 71. Hereinafter, each configuration will be described in detail.

"Device housing"
As shown in FIG. 2, the sheet post-processing apparatus B includes an apparatus housing 27, a sheet carry-in path 28 having a carry-in port 26 and a paper discharge port 35 built in the apparatus housing, and a sheet sent from this path. A first processing unit B1, a second processing unit B2, a third processing unit B3, and first, second, and third trays 49, 61, and 71 that store sheets sent from the processing units are provided. ing. The illustrated apparatus housing 27 is disposed at substantially the same height as the housing 1 of the image forming apparatus A located on the upstream side, and the sheet discharge port 16 of the image forming apparatus A and the carry-in port 26 of the sheet post-processing apparatus B from the installation surface. Are concatenated.

  The housing 27 of the apparatus shown in FIG. 2 includes an apparatus frame 70 and an exterior cover 73. The apparatus frame 70 forms a framework of a box-type apparatus as shown in the figure, and a front side frame frame 70f located on the front side in the state of FIG. 1, a rear side frame frame 70r located on the back side, It is comprised by the stay member 70s (connection reinforcement member) which connects between both frame frames. A sheet carry-in path 28, a processing tray 37, a stack tray 49, and the like, which will be described later, are attached between the left and right side frame frames.

  The exterior cover 73 includes a front cover 73f that covers the front side frame 70f and a rear cover 73r that covers the rear side frame. The device housing 27 is not limited to the shape shown in the figure, and is of a suitable design design. The device frame 70 is not limited to the left and right side frames and the connecting stay structure, and various frame structures such as a monocoque structure can be adopted. It is.

"Sheet carry-in route"
The sheet carry-in path 28 is constituted by a straight path that crosses the apparatus housing 27 in a substantially horizontal direction, and a carry-in inlet 26 that is continuous with the paper discharge port (main body discharge port) 16 of the image forming apparatus A, and the apparatus from the carry-in port A paper discharge port 35 is provided which is located on the opposite side across. In the sheet carry-in path 28, a conveyance roller 29 (a sheet conveyance unit such as a roller or a belt) that conveys a sheet from the carry-in port 26 toward the paper discharge port 35, and a paper discharge roller 36 disposed in the paper discharge port 35. (It may be a belt), an inlet sensor S1 for detecting the leading and trailing edges of the sheet carried into the path, and a sheet discharge sensor S2 for detecting the leading and trailing edges of the sheet at the path sheet discharge port.

  The above-described sheet carry-in path 28 is connected so as to distribute and transfer the sheet from the carry-in entrance 26 to the first processing unit B1 and the second processing unit B2, and the second processing unit B2 is disposed downstream on the upstream side in the path discharge direction. The first processing unit B1 is connected to the side. The substantially straight-shaped sheet carry-in path 28 is branched so that the sheet from the carry-in entrance 26 is transferred toward the second processing unit B2, and is then disposed on the downstream side of the path discharge port 35. The route configuration guides the processing unit B1.

  Further, a third paper discharge path (printout paper discharge path) 30 for guiding the sheet not subjected to post-processing in the first and second processing units B1 and B2 to the third tray 71 is connected to the sheet carry-in path 28 described above. The sheet is guided to a third tray (overflow tray) 71. The sheet carry-in path 28 incorporates a third processing unit B3, and this processing unit performs jog sorting that separates the sheets transported along the path by offsetting them in the sheet discharge orthogonal direction. That is, the third processing unit B 3 is built in the sheet carry-in path 28, and the sheets sorted by the processing unit are stored in the third tray 71.

  As shown in FIG. 2, the third sheet discharge path 30, the second sheet discharge path 32, and the first sheet discharge path 31 are arranged in the sheet carry-in path 28 on the downstream side from the carry-in entrance 26. The first path switching means 33 and the second path switching means 34 are arranged at the illustrated positions. Further, the second paper discharge path 32 and the first paper discharge path 31 are configured as switchback paths that reverse the sheet conveying direction and guide each processing unit.

  The third paper discharge path 30 guides the sheet sent from the carry-in entrance 26 to the third tray, and the second paper discharge path 32 guides the sheet sent from the carry-in entrance 26 to the second tray 61. The paper discharge path 31 guides the sheet discharged from the carry-in entrance 26 to the first tray 49. Then, the sheet guided to the third tray 71 is subjected to jog sorting processing by the third processing unit B3 in the path, and the sheet guided to the second tray 61 is bound by the second processing unit B2 to the first tray 49. The guided sheet is subjected to a binding process in the first processing unit B1.

  The first path switching means 33 is composed of a flapper guide that changes the sheet conveyance direction, and is connected to driving means (such as an electromagnetic solenoid and a mini motor) not shown. The switching means 33 selects whether to guide the sheet from the carry-in entrance 26 to the third paper discharge path 30 or to the first and second paper discharge paths 31 and 32. The second path switching means 34 selects whether the sheet sent from the carry-in entrance 26 is guided to the second processing unit B2 or to the first processing unit B1 on the downstream side. The second path switching means 34 is also connected with driving means (not shown). In the sheet carry-in path 28, a punch unit 100 for punching punch holes in the carried-in sheet is disposed.

[First processing unit]
The first processing unit B1 includes a processing tray 37 that is arranged on the downstream side of the sheet carry-in path 28 and that stacks and stacks the sheets sent from the paper discharge port 35, and a binding processing mechanism that binds the stacked sheet bundle. Is done. As shown in FIG. 2, a step is formed in the sheet discharge port 35 of the sheet carry-in path 28, and a processing tray 37 is disposed below the step, and the sheet is conveyed from the sheet discharge port between the sheet discharge port 35 and the processing tray. A first paper discharge path (first switchback path) 31 that reverses the direction and guides the sheet onto the tray is formed.

  Between the paper discharge port 35 and the processing tray 37, a sheet carry-in mechanism for carrying a sheet from the paper discharge port onto the tray, a positioning mechanism for positioning the sheet at a predetermined binding position on the processing tray 37, and A sheet bundle carrying-out mechanism for carrying out the bound sheet bundle to the first tray 49 on the downstream side is arranged. Each configuration will be described later.

  Note that the processing tray 37 shown in FIG. 2 bridges and supports the sheet sent from the sheet discharge outlet 35 with the first tray 49 on the downstream side. In other words, the sheet sent from the paper discharge port 35 is configured to support the leading end of the sheet on the uppermost sheet of the first tray 49 on the downstream side and the trailing end of the sheet on the processing tray 37 by bridging. Yes.

[Second processing unit]
A second paper discharge path (second switchback path) 32 is branched and connected to the sheet carry-in path 28 on the upstream side of the first paper discharge path (first switchback path) 31. The sheet is guided to the second processing unit B2. The second processing unit B2 aligns and collects the sheets sent from the sheet carry-in path 28, binds the center portion, and performs inward folding (hereinafter referred to as “magazine finishing”). A second tray 61 is arranged on the downstream side of the second processing unit B2, and stores the sheet bundle that has been bound.

  The second processing section B2 includes a guide member 66 for stacking sheets in a bundle, a restriction stopper 67 (the illustrated one is a tip restriction stopper) for positioning the sheet at a predetermined position on the guide member, and positioning by the stopper. A staple device 63 (saddle stitching staple unit) for binding the central portion of the sheet, and a folding processing mechanism (folding roll pair 64 and folding blade 65) for folding the sheet bundle at the central portion after the binding processing. .

  The saddle stitching stapling unit 63 has a central portion (line) in a state in which a sheet bundle is sandwiched between a head unit and an anvil unit as disclosed in Japanese Patent Application Laid-Open Nos. 2008-184324 and 2009-051644. ), And a binding mechanism is used. Further, as shown in FIG. 2, the folding processing mechanism employs a configuration in which a fold of a sheet bundle is inserted into a pair of folding rolls 64 that are in pressure contact with each other by a folding blade 65 and folded by rolling of the roll pair. Such mechanisms are also disclosed in Japanese Patent Application Laid-Open Nos. 2008-184324 and 2009-051644.

  The illustrated first processing unit B1 and the sheet carry-in path 28 are arranged in a substantially horizontal direction, and the second paper discharge path 32 for guiding the sheet to the second processing unit B2 is arranged in the vertical direction, and the sheets are collected and aligned. The guide member 66 is disposed in a substantially vertical direction. Thus, the apparatus can be slimmed by arranging the sheet carry-in path 28 in the direction crossing the apparatus housing 27 and arranging the processing paths (parts) 32 and B2 in the vertical direction.

  A second tray 61 is disposed on the downstream side of the second processing unit B2, and stores a sheet bundle folded in a magazine shape. The illustrated second tray 61 is disposed below the first tray 49. This is because the first tray 49 has a height position at which the sheet on the tray can be easily taken out because the device specification is higher than the usage frequency of the second tray 61.

"3rd processing part"
A third paper discharge path 30 is formed on the upstream side of the first paper discharge path 31 and the second paper discharge path 32 in the sheet carry-in path 28, and guides the sheet from the carry-in entrance 26 to the third tray 71. A roller shift mechanism (not shown) that offsets the sheet to be conveyed by a predetermined amount in the orthogonal direction is arranged in the path for guiding the sheet from the carry-in entrance 26 to the third tray 71 (carry-in path or third discharge path). ing.

  Then, the sheet in the orthogonal direction of the sheet carried out to the third tray 71 is shifted (offset) and stored on the tray so as to divide the sheet from the carry-in entrance 26 into each part. Since various mechanisms are known for the jog sorting mechanism, description thereof is omitted.

[Configuration of the manual feed set]
Inserted into the apparatus housing 27 is a sheet processing mechanism unit that guides the sheet from the sheet carry-in path 28 to the processing tray 37 and performs post-processing and then stores the sheet processing stack 37 in the stack tray 49, and an externally created sheet bundle in the outer cover 73. Thus, a manual feed setting unit 77 for binding processing is provided. This manual feed setting unit 77 is convenient when a binding processing mechanism is provided on the exterior of the sheet post-processing apparatus B when the operator, for example, bundles original sheets read from images and performs binding processing. For this reason, the sheet bundle aligned by the operator is set in a part of the casing, and a stapling device incorporated in the inside of the casing and a mechanism for binding processing by other binding processing devices are provided.

  The manual feed setting unit 77 arranged for the above purpose includes a slit-shaped opening 77a, a set surface 77b, and a regulating surface 77c, and a binding processing unit for binding the sheet bundle set on the set surface is disposed inside the apparatus. Is done.

  As shown in FIG. 4, the front cover 73f is provided with a slit-shaped opening 77a, and the side frame 70f is provided with a set surface 77b and a regulating surface 77c, and the sheet bundle S is inserted from the outside. . The illustrated apparatus is disposed at a position for supporting the sheet bundle at the position adjacent to each other on the same plane as the processing tray 37 described with reference to FIG.

  This is because a binding processing unit 47 (stapler unit) whose position can be moved along the edge of the processing tray 37, which will be described later, is moved to a set surface 77b arranged at a position adjacent to the processing tray 37 and manually set. This is for binding the bundle. For this reason, the set surface 77b is disposed so as to form the same plane as the paper loading surface 47a of the processing tray.

  The slit-shaped opening 77a is formed in the front cover 73f so that a sheet bundle can be inserted into the set surface 77b (same plane as the processing tray). The front cover 73f (whole or part) in which the slit-shaped opening 77a is formed is hinged to the device frame 70 so as to be opened and closed.

  The sheet bundle S that is manually inserted from the slit-shaped opening 77a is inserted into the binding position along the set surface 77b, and the end surface thereof is abutted and regulated against the regulation surface 77c at the binding position. Thus, the sheet bundle S inserted from the outside is positioned at a predetermined binding position by supporting the lower surface of the sheet bundle S on the set surface 77b and restricting the end surface against the regulating surface 77c. A stapling device (binding unit) 47 is built inside the set surface 77b and the regulating surface 77c, and the illustrated apparatus can be moved between the binding position of the processing tray 37 and the binding position of the set surface 77b. It is supported by the guide rail and moved by a driving mechanism having a shift motor.

[Binding operation of manual feed set]
The binding processing operation will be described below. The control means 95, which will be described later, waits for the binding unit 47 at or near the manual binding position in an operation mode in which the binding process is not performed on the processing tray 37 (post-processing in the second and third processing units B2 and B3 described above). Let In the illustrated apparatus, the home position of the binding unit 47 is set to the manual binding position Mp where the binding position is located on the front side of the side frame 70f.

[Punch unit]
A punch unit 100 which is disposed in the sheet carry-in path 28 and punches punch holes in a sheet sent from the carry-in entrance 26 will be described. The punch unit 100 arranges a plurality of punch members 101a to 101e at a predetermined interval in a direction orthogonal to the sheet conveying direction of the sheet carry-in path 28, and punches the selected number of holes in the sheet.

  FIG. 5 shows the overall configuration of the punch unit 100. The punch unit 100 includes a unit frame 102, a plurality of punch members 101a to 101e arranged on the unit frame so as to be movable up and down, a drive cam 103 that moves each punch member up and down (reciprocates in the punching direction), It is comprised by the drive motor M7 which drives a drive cam.

  Reference numeral 104 denotes a waste box, which is disposed below the punch member 101 and stores perforated waste paper pieces. The waste box 104 is attached to the guide rail 105 so as to be slidable on the apparatus frame 70 (different from the unit frame). Reference numeral 106 denotes a rotation operation member. When a jam occurs in the punch member 101 or when an abnormality occurs in the drive motor M7, the drive cam 103 is forcibly rotated to pull away the punch member 101 that has digged into the sheet. ). Therefore, the rotation operation member 106 is configured by a manual rotation knob connected to the rotation shaft 107 of the drive cam 103.

  As shown in FIG. 6, the unit frame 102 includes an upper frame 102a and a lower frame 102b having a predetermined length in a direction orthogonal to the sheet conveyance direction of the carry-in path 28. A plurality of punch members 101a to 101e are arranged on the upper frame 102a so as to be able to reciprocate in the punching direction (movable up and down) at a predetermined interval in a direction orthogonal to the sheet conveying direction (hereinafter referred to as “conveying orthogonal direction”). . In the lower frame 102b, a perforated hole (die) is formed at a position facing each punch portion 101. A drive rotating shaft 107 is disposed on the unit frame 102, and a driving cam 103 that moves the punch members 101 up and down is attached to the rotating shaft. A drive motor M7 is coupled to the drive rotating shaft 107 via a transmission mechanism.

  The illustrated drive cam 103 is constituted by a cylindrical cam member that is attached to the drive rotation shaft 107 and corresponds to the plurality of punch members 101, and each punch member is connected to the cam member by a connecting pin. The punch member 101 is moved up and down in the drilling direction by a predetermined angle rotation of the drive rotating shaft 107. At this time, the first groups 101b and 101d (for example, 2-hole drilling) of the plurality of punch members move up and down in the drilling direction at the first rotation angle of the drive rotation shaft 107, and the second groups 101a, 101c, 101e (for example, 3-hole drilling) moves up and down in the drilling direction.

  Therefore, the control means 95 described later causes the first group of punch members 101b and 101d to pierce when the drive rotation shaft 107 is reciprocated within a preset angle range, and when the drive rotation shaft 107 reciprocates within a different angle range, the second group of punch members 101a. , 101c, 101e can be perforated.

  The waste box 104 is disposed below the punch member 101, supported by a guide rail 105 provided on the apparatus frame, and is detachable from the apparatus front side (the illustrated front cover 73f). That is, the above-described front cover 73f is hinged to the apparatus frame 70 so as to be openable and closable, and the waste box 104 is taken out of the apparatus with the front cover opened.

  Further, the drive motor M7 is connected to the drive rotation shaft 107 via a speed reduction mechanism (gear transmission mechanism), and the rotation shaft 107 is rotated so that the operator can manually rotate it. The member is disposed on the front side of the side frame frame 70f through the opening 70x provided in the side frame frame 70f. The front cover 73f described above can be opened and closed on the front side of the apparatus, and the rotation operation member 106 can be operated in the open state. In this cover open state, the drive motor M7 is not supplied (cut off) with drive power.

[Punch unit shift mechanism]
The punch unit 100 described above is attached to the apparatus frame 70 so as to be movable. For example, the upper frame 102a of the unit frame is slid through the opening 70x provided on the side frame 70f on the guide rail 108 and attached to a stay member 70s that connects the both side frames 70f and 70r of the apparatus frame 70. It is movably fitted. A rack 109 is integrally formed on a part of the upper frame 102a, and the entire unit frame is moved from the state shown in FIG. 6 to the state shown in FIG. 7 by the shift motor M8 and the drive pinion 110 mounted on the apparatus frame side.

  The punch unit 100 is configured to be movable in the conveyance orthogonal direction as described above. The sheet carried into the carry-in path 28 has (1) sheet size dimensional error and (2) sheet misalignment in the image forming unit. For this reason, the position is shifted in the conveyance orthogonal direction. If punch holes are drilled without correcting this misalignment, the finished quality will be extremely poor. In order to correct the positional deviation of the carry-in sheet, it is necessary to move the punch unit 100 in the orthogonal direction of conveyance or to move the sheet in the orthogonal direction.

  In the present invention, the punch unit 100 is moved in the conveyance orthogonal direction in accordance with the sheet sent to the sheet carry-in path 28, and the movement direction is set in the same direction (the front side of the apparatus) as the manual feed setting unit 77 described above. It is characterized in that the setting is such that the moving region of the punch unit 100 and the sheet setting region of the manual feed setting unit 77 overlap each other in the conveyance orthogonal direction.

[Punch unit shift control]
The punch unit 100 described above moves to the position of the perforated hole that matches the side edge of the sheet that has entered the carry-in path 28. This is to prevent the position of the perforated hole from being shifted for each sheet due to the dimensional error of the sheet and the positional shift of the sheet carried into the carry-in port as described above. The method is as follows: (1) A sensor array for submitting the side edge of the sheet is arranged in the carry-in path 28, and the amount of movement of the unit from the sheet size information sent from the image forming apparatus A and the array signal detecting the sheet edge. To move the position. Or (2) A sensor for detecting the sheet side edge is provided in the unit, and at the timing when the sheet enters the carry-in path, the unit is moved in the conveyance orthogonal direction and the sheet side edge is detected by the sensor. Then, the movement amount of the unit is calculated from the detection signal and the sheet size information, and the position is moved. Or (3) A plurality of sensors corresponding to the sheet size are arranged in the unit, and the unit is moved in the conveyance orthogonal direction at the timing when the sheet enters, and the side edge of the sheet is detected. At the same time, the sheet size is determined from the detected sensor and moved in the unit conveyance orthogonal direction.

  The illustrated apparatus adopts the method (3) described above. As a result, the amount of movement of the unit can be set to a minimum, and the apparatus can be made compact. Therefore, on the unit frame 102, sensors S3 (for example, JISB5 length), S4 (A4 length), S5 (B5 width), S6 (A4 width, A3 length) for detecting the side edge of the sheet are arranged for each size. Has been. S1 shown in the figure is an inlet sensor disposed in the sheet carry-in path 28, and S2 is an outlet sensor (paper discharge sensor). Reference numeral HpS denotes a home position sensor attached to the unit frame 102.

  The control means 95 described later detects the timing at which the leading edge of the sheet enters the carry-in path 28 by the inlet sensor S1, and moves the punch unit 100 in a predetermined direction from the home position by the detection signal. Then, the detection signal of the sensor that detects the sheet side edge is received, it is determined by which sensor the signal is transmitted, the sheet size and the side edge are recognized, and the punching position corresponding to the size is determined. Then, the punch unit 100 is moved to the punching position. For this reason, the shift motor M8 is composed of a stepping motor, or an encoder for detecting the amount of rotation is connected to the rotating shaft.

  Particularly, the illustrated control means 95 moves the punch unit 100 to the outside of the sheet (in the direction of arrow A in FIG. 7) based on the signal detected by the inlet sensor S1 to detect the side edge of the sheet. Next, the unit is overrun by a predetermined amount to stop and move to the sheet center side (in the direction of arrow B). Then, the side edge of the sheet is detected again, and the unit is moved to the sheet center side by a predetermined amount based on the detection signal to be positioned at the punching position. In this manner, the punch unit 100 is moved to the position outside the sheet (from the small size to the large size direction), and then moved to the sheet center side to detect the sheet side edge. As a result, it is possible to eliminate the position error caused by the back crash in the drive mechanism.

  Therefore, according to the present invention, the conveyance unit orthogonal direction moving region (FIG. 6; Px) of the punch unit 100 and the sheet setting region (FIG. 6; Sx) of the setting surface 77a of the manual setting unit are distanced back and forth in the sheet conveyance direction of the carry-in path 28. Place them at different positions separated from each other. At the same time, the moving area Px of the punch unit 100 and the set area Sx of the set surface are arranged at different positions where the step Y is formed.

  That is, the area Px and the area Sx are arranged at different positions (interval X) in the sheet conveyance direction, and at the same time, arranged at different positions (step Y) in the height direction orthogonal to the conveyance direction. At the same time, the region Px and the region Sx are arranged at positions where they overlap each other in the sheet width direction (overlap amount z). As a result, the apparatus becomes smaller and more compact by the overlap amount.

"Configuration of the first processing unit"
Each configuration of the sheet carry-in mechanism, the sheet positioning mechanism, the binding processing mechanism, and the sheet bundle carry-out mechanism of the first processing unit B1 will be described.

"Sheet loading mechanism"
As shown in FIG. 3, between the paper discharge port 35 and the processing tray 37, reverse conveying mechanisms 41 and 42 for switching back the sheet from the paper discharge port in the paper discharge direction and the opposite direction of the paper discharge, and the sheet in the tray. A guide mechanism (sheet guide member) 44 that guides the sheet to the side and a scraping rotator 46 that guides the sheet to the leading edge regulating means are arranged.

  The reversing and conveying mechanism includes an elevating roller 41 that moves up and down between an operating position that engages with a sheet that is loaded onto the processing tray and a separated standby position, and a paddle rotating body 42 that transfers the sheet in the direction opposite to the paper discharge. The elevating roller 41 and the paddle rotating body 42 are attached to a swing bracket 43.

  A swing bracket 43 is disposed on the apparatus frame 27a so as to be swingable about a rotation shaft 36x (the sheet discharge roller shaft is shown), and the rotation shafts of the lifting roller 41 and the paddle rotating body 42 are supported by bearings on the bracket. ing. The swinging bracket 43 is connected to a lifting motor (not shown), and moves up and down between an operating position where the mounted lifting roller 41 and the paddle rotating body 42 are engaged with the sheet and a standby position separated from the sheet.

  A driving motor (not shown) is connected to the paddle rotating body 42 and the lifting roller 41 is connected to the paddle rotating body 42, and the driving is transmitted so that the lifting roller 41 rotates in the forward / reverse direction and the paddle rotating body 42 rotates in the reverse direction (the direction opposite to the paper discharge). ing. The processing tray 37 is also provided with a driven roller 48 that is in pressure contact with the elevating roller 41 and nips a single sheet or a bundle of sheets and carries the sheet downstream.

  A guide mechanism for guiding the trailing edge of the sheet carried on the processing tray toward the regulating means 38 is disposed between the raising and lowering roller 41 and a scraping rotary body 46 described later. The guide member 44 is configured to move up and down from the dotted line state to the solid line state. The guide member 44 is retracted to the dotted line position when the sheet is carried out from the discharge port 35, and the rear end of the sheet has passed through the discharge port 35. Later, the rear end of the sheet is guided onto the processing tray. For this reason, a driving mechanism (not shown) is connected to the sheet guide member 44 and moves up and down in accordance with the timing for guiding the sheet rear end from the sheet discharge port 35 onto the processing tray.

"Sheet positioning mechanism"
Positioning mechanisms 38 and 39 for positioning the sheet at a predetermined binding position are arranged on the processing tray 37. The illustrated mechanism is a sheet end regulating means 38 that abuts and regulates the trailing end of the sheet, and a sheet side edge as a reference ( The side edge aligning means 39 is positioned at the center reference and one side reference) position.

  As shown in FIG. 3, the sheet end regulating means 38 is constituted by a stopper member that abuts and regulates the rear end of the sheet. The side edge aligning member 39 will be described later with reference to FIG. 9, but in the illustrated apparatus, the sheet is discharged from the sheet carry-in path 28 with the center reference, and is positioned with the same center reference according to the binding mode, or with the one side reference. Position it.

"Side edge alignment means"
As shown in FIG. 9, the side edge alignment plates 39F and 39R protrude upward from the paper loading surface 37a of the processing tray 37, have a regulating surface 39x that engages with the side edge of the sheet, and are arranged so as to face each other on the left and right sides. To do. The pair of side edge aligning means 39 is arranged on the processing tray 37 so as to be reciprocable with a predetermined stroke. This stroke is set by the size difference between the maximum size sheet and the minimum size sheet and the offset amount by which the sheet bundle after alignment is moved (offset transported) in either the left or right direction.

  That is, the moving strokes of the left and right side edge aligning means 39F and 39R are set by the moving amount for aligning different size sheets and the offset amount of the aligned sheet bundle. In the offset movement of the side edge alignment plates 39F and 39R, a sheet conveyed on the basis of the center is moved by a predetermined amount when corner binding is performed, and is moved by a predetermined amount to the left when right corner binding is performed and to the left side when left corner binding is performed. This offset movement is performed either when the sheets are carried into the processing tray 37 one by one (for each carried-in sheet) or when the sheets are moved in a bundle for binding processing after the sheets are aligned in a bundle. Is adopted.

  Therefore, as shown in FIG. 9, the side edge aligning means 39 is composed of a right edge aligning member 39F (device front side) and a left edge aligning member 39R (device rear side). The regulating surface 39x that engages with the end is supported by the processing tray 37 so as to move in the approaching direction or the separating direction. The processing tray 37 is provided with a slit groove (not shown) penetrating the front and back, and a side edge aligning means 39 having a regulating surface 39x that engages with the sheet side edge is slidably fitted from the slit to the upper surface of the tray. ing.

  The side edge aligning members 39F and 39R are slidably supported by a plurality of guide rollers 80 (which may be rail members) on the back side of the tray, and a rack 81 is integrally formed. Alignment motors M 1 and M 2 are connected to the left and right racks 81 via pinions 82. The left and right alignment motors M1 and M2 are stepping motors. The position sensors (not shown) detect the positions of the left and right side edge alignment members 39F and 39R, and the alignment members are moved in either direction to the left or right based on the detected values. The position can be moved by a designated movement amount.

  Instead of using the illustrated rack-pinion mechanism, it is also possible to employ a configuration in which the side edge alignment members 39F and 39R are fixed to a timing belt and connected to a motor that reciprocates the belt with a pulley.

  With such a configuration, the control unit 95, which will be described later, places the left and right side edge alignment members 39F and 39R at a predetermined standby position (sheet width size + α position) based on sheet size information provided from the image forming apparatus A or the like. Wait. In the case of “multiple binding”, the sheet is carried onto the processing tray 37 and the alignment operation is started at the timing when the sheet end hits the trailing edge regulating means 38. In this alignment operation, the left and right alignment motors M1 and M2 are rotated in the opposite direction (approach direction) by the same amount.

  Then, the sheets carried into the processing tray 37 are positioned with reference to the sheet center and stacked in a bundle. By repeating the sheet carrying-in operation and the aligning operation, the sheets are collected in a bundle on the processing tray 37. At this time, sheets of different sizes are positioned based on the center reference. In the case of “corner binding”, the sheet is carried onto the processing tray 37, and the alignment operation is started at the timing when the sheet edge hits the trailing edge regulating means 38. This alignment operation makes the movement amount of the alignment plate on the binding position side different from the movement amount of the alignment plate on the opposite side of the binding position. Then, the movement amount is set so that the sheet corner is positioned at a preset binding position.

"Binding mechanism"
In the processing tray 37, binding processing mechanisms 47 and 60 for binding the sheet bundle accumulated on the paper placement surface 37a are arranged. The processing tray 37 is positioned at a predetermined binding position on the paper loading surface 37a by a positioning mechanism (sheet end regulating means 38 and side edge aligning means 39). The binding processing mechanisms 47 and 51 include a first binding unit 47 (first binding means; the same applies to “staple unit” and the following) that binds a sheet bundle with staples, and a second binding unit 51 (second binding) that staples the sheet bundle. Means; “eco-binding unit” and the like) are selectively arranged at the binding position.

  As shown in FIG. 2, the processing tray 37 is provided with binding processing mechanisms 47 and 51 for binding the trailing edge of the sheet carried from the paper discharge port 35. The binding mechanism is shown in FIG. The staple unit (first binding unit) 47 and the eco-binding unit (second binding unit) 51 are movable along the rear end of the paper loading surface 37a.

  FIG. 8 shows a staple unit (first binding unit) 47 and an eco-binding unit (second binding unit) 51 arranged on the processing tray. In the illustrated apparatus, a binding position Cp1 is set at a sheet corner located on the left side of the drawing. The first binding unit 47 and the second binding unit 51 are reciprocally moved to the binding position Cp1.

  For this reason, the first binding unit 47 moves with a predetermined stroke SL1 along the first traveling rail 53 and the second traveling rail 54 formed on the apparatus frame 27b. Similarly, the second binding unit 51 is disposed on the apparatus frame 57. The first guide rod 56a and the second guide rod 56b (see FIG. 12) are arranged so as to move with the stroke SL2.

  FIG. 9 shows a movement stroke of the sheet carried into the processing tray 37 and the first and second binding units 47 and 51. The processing tray 37 carries different size sheets from the maximum size sheet to the minimum size sheet on the basis of the center. The pair of left and right side edge aligning members 39F and 39R aligns the sheet with reference to the binding side edge of the sheet (the left edge in the figure) so that sheets of different sizes match. For this reason, the left and right alignment members 39F and 39R are connected to different drive motors M1 and M2, respectively, and the control means 95 described later sets the movement amounts of the left and right alignment members 39F and 39R according to the sheet size.

  Note that the control unit 95 described later aligns sheets based on the center reference in a binding process other than the sheet corner binding process, for example, in a multi-binding mode described later. In this case, the left and right alignment members 39F and 39R are moved to the sheet center by the same amount from the standby position, thereby positioning the sheet at the binding position.

  Referring to FIG. 9, the first binding unit 47 is in the first stroke SL1 between the standby position Wp1 (first standby position) and the binding position Cp1, and the second binding unit 51 is in the standby position Wp2 (second standby position). And the second stroke SL2 between the binding position Cp1. That is, the first binding unit 47 reciprocates between the standby position Wp1 and the binding position Cp1 along the running rails 53 and 54 (guide grooves, guide rods, etc.), and the second binding unit 51 is guided by the guide rods 56a and 56b ( It may reciprocate between the standby position Wp2 and the binding position Cp1 along the guide groove).

The binding position Cp1 is set at the sheet corner (hereinafter referred to as “set binding position”), and the first standby position Wp1 and the second standby position Wp2 have the following relationship with respect to this position.
(1) Setting is performed so that the first standby position Wp1 and the second standby position Wp2 are located on the opposite sides with the set binding position Cp1 interposed therebetween.
(2) The first standby position Wp1 is the outside of the maximum size sheet to be bound on the processing tray, or the binding processing position farthest from the set binding position Cp1 on the processing tray (a multi-binding position Ma or a manual binding position described later) Mp: maximum remote binding position).
(3) The second standby position Wp2 is set outside the sheet side edge aligned with the set binding position (outside the sheet placement area of the paper placement surface).
(4) The first stroke length SL1 between the first standby position Wp1 and the set binding position Cp1 is set larger (longer) than the second stroke length SL2 between the second standby position Wp2 and the set binding position Cp1. To do.

  Thus, by setting the first standby position Wp1 and the second standby position Wp2 to the opposite sides with respect to the set binding position Cp1, when one unit approaches, the other unit moves away (reciprocal retreat approach). Operation). Further, by setting SL1> SL2, the binding processing position (multi-binding position Ma described later) of the first binding unit 47 can be set relatively freely. On the other hand, the second binding unit 51 performs the binding process only at a preset binding position. As a result, the total movement stroke length of the first and second binding units 47 and 51 can be set small, and the apparatus can be miniaturized.

  The control means 95, which will be described later, is configured such that when the first binding unit 47 is at the set binding position Cp1, the second binding unit is at the standby position Wp2, and when the second binding unit 51 is at the set binding position Cp1, the first binding unit is at the standby position Wp1. Move both units in a reciprocal manner so that

  The reciprocal position movement of the first and second binding units 47 and 51 can be achieved by (1) varying the amount of rotation in accordance with the movement stroke with independent drive motors, or (2) using the same drive source for the first binding unit. Either one of the methods of making the movement amount of 47 and the second binding unit 51 different is adopted.

  FIG. 10 shows a mode in which the first binding unit 47 and the second binding unit 51 are moved differently by the same drive source. A pair of left and right pulleys 58a and 58b are arranged on the device frame 27b along the moving region (the left-right direction in FIG. 10) of the first unit, and a timing belt 59 (toothed belt) is bridged between both pulleys. A drive motor M3 (stepping motor) is connected to the pulley 58a.

  A transmission pinion 75 is connected to the other pulley 58b via a differential means (transmission means) 74, and a rack 76 fixed to the frame of the second binding unit 51 is engaged with the pinion. The differential means 74 is constituted by a gear mechanism having a transmission ratio that matches the stroke difference between the first and second strokes SL1 and SL2, a slip clutch mechanism, or a combination of both mechanisms.

"Staple moving mechanism"
As shown in FIG. 3, the staple unit is attached to the staple device frame (chassis frame) 27b that is fixed to the side frame frames 70f and 70r through the opening 70x provided in the side frame frame 70f of the device frame 70. 47 is mounted so as to be movable at a predetermined stroke. A first traveling rail 53 and a second traveling rail 54 are disposed on the device frame 27b. A travel rail surface 53x is formed on the first travel rail 53, and a travel cam surface 54x is formed on the second travel rail 54. The travel rail surface 53x and the travel cam surface 54x cooperate with each other to form a staple unit 47 (hereinafter referred to as this section). In this case, the "moving unit" is supported so as to be able to reciprocate with a predetermined stroke, and its angular attitude is controlled at the same time.

  The first traveling rail 53 and the second traveling rail 54 are formed with a rail surface 53x and a traveling cam surface 54x so as to reciprocate within the moving range of the moving unit (see FIG. 5). A timing belt 59 connected to a drive motor (travel motor) M3 is fixed to the moving unit 47 (staple unit). The timing belt 59 is wound around a pair of pulleys 58a and 58b pivotally supported on the apparatus frame 27b, and a drive motor M3 is connected to one of the pulleys. Therefore, the staple unit 47 reciprocates at the stroke SL1 by forward and reverse rotation of the drive motor M3.

  The moving unit 47 is engaged with the first and second traveling rails 53 and 54 as follows. As shown in FIG. 3, the moving unit 47 includes a first rolling roller 83 (rail fitting member) engaged with the traveling rail surface 53x and a second rolling roller 84 (engaged with the traveling cam surface 54x). Cam follower member). At the same time, the moving unit 47 is formed with ball-shaped sliding rollers 47x (two in the figure) that engage with the support surface of the frame 27b. Further, the moving unit 47 is formed with a guide roller 47y that engages with the bottom surface of the bottom frame portion frame to prevent the moving unit 47 from floating from the bottom frame frame 27b.

  From the above configuration, the moving unit 47 is supported by the bottom frame frame 27b so as to be movable by the sliding roller 47x and the guide roller 47y. At the same time, the first rolling roller 83 travels along the traveling rail surface 53x, and the second rolling roller 84 travels along the rail surface 53x and the cam surface 54x while rotating along the traveling cam surface 54x.

"Stack tray lifting mechanism"
In the sheet post-processing apparatus B, the first tray 49 is provided on the exterior cover 73 as shown in FIG. The first tray 49 is configured to move up and down according to the sheet stacking amount. For this reason, as shown in FIG. 11, guide rollers 85 are provided at two upper and lower positions on the base end portion of the first tray 49, and these guide rollers are fitted and supported by a lifting guide 86 provided on the apparatus frame 27. . The base end portion of the first tray 49 is connected to an elevating belt 87, and the elevating belt is supported by a pair of upper and lower pulleys 88a and 88b. A lifting motor M4 is connected to one (drive pulley) 88a of this pulley. Therefore, by controlling the rotation of the lifting motor M4, the first tray 49 moves up and down according to the stacking amount of sheets.

"Sheet bundling mechanism"
The processing tray 37 is provided with a sheet bundle carrying-out mechanism for carrying out the bound sheet bundle toward the first tray 49 on the downstream side. As a means for conveying the sheet bundle to the downstream side, a method of conveying with a pair of rollers in pressure contact with each other (carrying-out roller means), and a conveyor that pushes out the trailing edge of the sheet with an extrusion member that moves from the upstream side to the downstream side along the tray surface. Means are known. The illustrated apparatus employs both means.

  FIG. 12 shows a sheet bundle carry-out mechanism, and the extrusion protrusion 38 that moves from the binding position (processing position) located upstream along the processing tray 37 to the stack tray (first tray) 49 on the upstream side, and the extrusion protrusion moves. The conveyor belt 38v and the drive motor M6 constitute a conveyor means. The processing tray 37 is provided with a follower roller 48 (boundary between the paper loading surface 37a and the first tray 49) and a lift roller 41 that is in pressure contact with the follower roller in the above-described configuration. 48 and the raising / lowering roller 41 constitute the carry-out roller means.

  Therefore, the processing tray 37 is provided with conveyor means 38 and 38v for transferring the sheet bundle so as to push the sheet bundle from the upstream side to the downstream side, and carry-out roller means 48 and 41 for nipping and carrying the sheet bundle. . FIG. 12A shows a state in which the sheet bundle is positioned at the binding position on the processing tray. At this time, the conveyor means 38 and 38v and the carry-out roller means 48 and 41 are placed in an operating state. FIG. 4B shows a state in the middle of transferring the sheet bundle from the processing position to the downstream side, and the sheet bundle is sent to the downstream side by the position movement of the extrusion protrusion 38 and the rotation of the carry-out roller means 48 and 41. FIG. 7C shows a state immediately before the sheet bundle is carried out to the first tray 49 on the downstream side. The sheet bundle on the processing tray is gradually lowered (low speed) by the rotation of the carry-out roller means 48 and 41. Sent). At this time, the push-out protrusion 38 stands by at the illustrated position and returns (retreats) to the initial position.

"Configuration of staple unit"
The configuration of the above-described staple unit will be described with reference to FIG. The staple unit 47 is configured separately from the sheet post-processing apparatus B. A box-shaped unit frame 47a, a drive cam 47d pivotally supported by the frame, and a drive motor M4 for rotating the drive cam are mounted on the unit frame 47a.

  In the drive cam 47d, a staple head 47b and an anvil member 47c are arranged opposite to the binding position, and the staple head 47b is biased to the drive cam 47d by an urging spring (not shown) from the upper standby position to the lower staple position (anvil member). ) Up and down. A needle cartridge 52 is detachably attached to the unit frame.

  A linear blank needle is stored in the staple cartridge 52, and the staple is fed to the staple head 47b by a staple feed mechanism. In the staple head portion 47b, a former member for bending a straight needle into a U shape and a driver for press-fitting the bent needle into the sheet bundle are incorporated. With such a configuration, the drive cam 47d is rotated by the drive motor M4 and stored in the urging spring. When the rotation angle reaches a predetermined angle, the staple head portion 47b moves downward toward the anvil member 47c. With this operation, the staple is folded into a U-shape and inserted into the sheet bundle with a screwdriver. Then, the tip is bent and stapled by an anvil member 47c.

  Further, a needle feed mechanism is built in between the staple cartridge 52 and the staple head 47b, and a sensor (empty sensor) for detecting the absence of the needle is disposed in this needle feed section. Alternatively, a cartridge sensor (not shown) for detecting whether or not the needle cartridge 52 is inserted is disposed in the unit frame 47a.

  The illustrated needle cartridge 52 employs a structure in which staple needles connected in a strip shape to a box-shaped cartridge are stacked and stored, and a structure in which the staple needles are stored in a roll shape. The unit frame 47a is provided with a circuit for controlling the above-described sensors and a circuit board for controlling the drive motor M4. When the staple cartridge 52 is not stored or when the staple is empty, a warning signal is issued. It has become. The staple control circuit controls the drive motor M4 to execute a stapling operation in response to a staple needle signal. When the staple head moves from the standby position to the anvil position and returns to the standby position, the “operation end signal” is displayed. ”Is transmitted.

"Configuration of the needleless binding unit"
The configuration of the above-described needleless binding unit 51 will be described with reference to FIG. As a needleless binding means for binding a sheet bundle without using a metal needle, a means for pressing the sheet bundle from the front and back with a pressing member having concave and convex surfaces meshing with each other to bind the sheets together (press bind binding apparatus) And means for forming slit-like cuts in the sheet bundle to fold and bind the sheets together (notch folding device; see JP 2011-256008 A), and means for binding with a vegetable resin string ( Resin string binding devices) are known. These binding methods are known as eco binding binding methods because they are bound using sheet bundles without using metal needles. Hereinafter, a press binding mechanism will be described as an example.

  As the press binding mechanism, the pressing surfaces 51b and 51c, which can be pressed against and separated from each other, are formed with concave and convex surfaces, and the sheet bundle is pressed from the front and back to deform and bind the sheets. FIG. 13B shows a press bind unit 51. A movable frame member 51d is pivotally supported on a base frame member 51a, and both frames are pivotally supported by a support shaft 51x. A follower roller 60a is disposed on the movable frame member 51d, and a drive cam 60b disposed on the base frame member 51a is engaged with the follower roller.

  A drive motor M5 disposed on the base frame member 51a is connected to the drive cam 60b via a speed reduction mechanism. The drive cam 60b is rotated by the rotation of the motor, and a movable frame is formed on the cam surface (the illustrated one is an eccentric cam). The member 51d is configured to swing.

  The lower pressing surface 51c is disposed on the base frame member 51a, and the upper member pressing surface 51b is disposed on the movable frame member 51d. Although not shown, an urging spring is disposed between the base frame member 51a and the movable frame member 51d, and is urged in a direction in which the pressure surfaces are separated from each other.

  As shown in the enlarged view of FIG. 13B, the upper pressure surface 51b and the lower pressure surface 51c are formed with protrusions on one side and recessed grooves that match the protrusions on the other side. The protrusions and the recessed grooves are formed in a rib shape having a predetermined length. Therefore, the sheet bundle sandwiched between the upper pressure surface 51b and the lower pressure surface 51c is deformed into a corrugated plate shape and comes into close contact. A position sensor (not shown) is disposed on the base frame member 51a (unit frame), and is configured to detect whether the upper and lower pressure surfaces 51b and 51c are in the pressure position or the separated position.

  The press bind unit (eco-binding unit; second binding unit) 51 configured in this way is provided with first and second guide rods 56a and 56b (grooves) arranged on the device frame 57 attached to the side frame frame 70r. May be movable), and as described above, the set binding position Cp1 of the sheets stacked on the processing tray 37 located between the side frame frames 70f and 70r and the rear side of the side frame frame 70r. It reciprocates between the second standby positions Wp.

[Description of control configuration]
A control configuration in the image forming system of FIG. 1 will be described with reference to FIG. The image forming system shown in FIG. 14 includes a control unit 90 (hereinafter referred to as “main body control unit”) of the image forming apparatus A and a control unit 95 (hereinafter referred to as “binding processing control unit”) of the sheet post-processing apparatus B. . The main body control unit 90 includes a print control unit 91, a paper feed control unit 92, and an input unit 93 (control panel).

  Then, an “image forming mode” and a “post-processing mode” are set from the input unit 93 (control panel). The image forming mode sets mode settings such as color / monochrome printing, duplex / single-sided printing, and image forming conditions such as sheet size, sheet paper quality, number of printouts, and enlarged / reduced printing. The “post-processing mode” is set to, for example, “print-out mode”, “staple binding processing mode”, “eco-binding processing mode”, “jog sorting mode”, or the like. The apparatus shown in the figure is provided with a “manual binding mode”, and in this mode, the sheet bundle binding processing operation is executed off-line separately from the main body control unit 90 of the image forming apparatus A.

  Further, the main body control unit 90 transfers the post-processing mode, the number of sheets, the number of copies information, the sheet thickness information of the sheet on which an image is formed, and the like to the binding processing control unit 95. At the same time, the main body control unit 90 transfers a job end signal to the binding processing control unit 95 every time image formation is completed.

  The above-described post-processing mode will be described. In the “print-out mode”, the sheet from the paper discharge port 35 is stored in the stack tray 49 via the processing tray 37 without performing the binding process. In this case, the sheets are stacked and stacked on the processing tray 37, and the stacked sheet bundle is carried out to the stack tray 49 by a jog end signal from the main body control unit 90.

  In the “staple binding processing mode”, the sheets from the paper discharge outlet 35 are stacked on the processing tray and aligned, and the sheet bundle is bound and stored in the stack tray 49. In this case, the sheet to be imaged is in principle designated by the operator to a sheet of the same paper thickness and the same size. As the staple binding processing mode, one of “multiple binding”, “right corner binding”, and “left corner binding” is selected and designated. Each binding position is as described above.

  The “jog sorting mode” is divided into a group in which sheets formed with an image formed by the image forming apparatus A are offset and stacked, and a group in which sheets are stacked without being offset. Sheet bundles that are not offset are stacked.

"Manual binding mode"
The exterior cover is provided with a manual setting unit on the front side of the apparatus for setting a sheet bundle to be bound by an operator. A sensor for detecting the set sheet bundle is arranged on the set surface of the manual feed setting unit, and a binding processing control unit 95 described later moves the stapler unit 47 to the manual binding position by a signal from the sensor. When the operator depresses the operation switch, the binding process is executed.

  Therefore, in this manual binding mode, the binding processing control unit 95 and the main body control unit 90 are controlled off-line. However, when the manual binding mode and the staple binding mode are executed simultaneously, the mode is set so that either one has priority.

[Binding control unit]
The binding process control unit 95 operates the sheet post-processing apparatus B according to the post-processing mode set by the image formation control unit 90. The illustrated binding processing control unit 95 includes a control CPU (hereinafter simply referred to as control means). A ROM 96 and a RAM 97 are connected to the control CPU 95, and a paper discharge operation described later is executed using a control program stored in the ROM 96 and control data stored in the RAM 97. For this reason, the control CPU 95 is connected to the drive circuits of all the drive motors described above to start, stop, and forward / reversely control each motor.

[Paper operation mode]
The control unit (main body control unit) 90 of the image forming apparatus A sets a post-processing (finishing processing) mode of the sheet on which an image is formed simultaneously with the image forming conditions. The illustrated apparatus is set to “staple binding mode”, “eco-binding mode”, “jog sorting mode”, “bookbinding finishing mode”, “print-out mode”, “interrupt mode”, and “manual binding mode”. The operation in each mode will be described below.

  FIG. 15 is an explanatory diagram of an operation flow of stapling or eco-binding the sheet bundle stacked on the processing tray 37 of the first processing unit B1 and storing the bundle in the first tray 49 on the downstream side. FIG. 16 is an explanatory diagram of a sheet discharge mode in which the sheet is jog-divided into parts, and is offset in the sheet discharge orthogonal direction by the jog mechanism (roller shift mechanism; not shown) of the third processing unit (sheet carry-in path) B3. It is explanatory drawing of the operation | movement flow accommodated in the 3rd tray 71 of downstream later. FIG. 17 is an explanatory diagram of a bookbinding processing paper discharge mode in which the second processing unit B2 performs bookbinding finishing.

“Staple binding mode and eco-binding mode in the first processing unit”
Referring to FIG. 15, the post-processing mode is set on the control panel 93 of the image forming apparatus A (St01). Based on the post-processing mode setting information (St02), the control unit 95 of the sheet post-processing apparatus B moves the second binding unit 51 when the eco-binding process is designated (St05). When the stapling process is designated, the first binding unit 47 is moved (St06).

  When executing the staple binding process, the first binding unit 47 is moved to the set binding position Cp1, and the second binding unit 51 is moved to the second standby position Wp2. When this unit position is set as a home position, each unit moves after confirming whether it is home.

  Next, the image forming apparatus A forms an image and discharges the sheet (St07, St08). The sheet post-processing apparatus B receives the image forming sheet sent to the carry-in entrance 26 and conveys it to the downstream side (St09). At this time, when punching is designated (St10), the control means 95 temporarily stops the sheet at the punching position (St11). Then, the punch unit 100 is moved in the direction perpendicular to the paper discharge, and the side edge of the sheet is detected by a sensor to determine a predetermined punching position, and then the punch unit 100 is stopped and the punching operation is executed (St13).

  When punching processing is not designated, the control means 95 accepts the carry-in side sheet and conveys it to the path paper discharge port. Then, it is carried into the processing tray 37 and positioned at a predetermined position by the positioning means (St15). The control means 95 stacks and stores the sheets sent to the paper discharge port 35 on the paper placement surface of the processing tray 37 (St07 to St15). When the jog end signal is received from the image forming apparatus A (St <b> 16), the control unit 95 transmits a binding processing instruction signal to the first binding unit 47 or the second binding unit 51. Then, the first binding unit 47 or the second binding unit 51 executes the binding process (St17).

  When receiving the binding processing end signal from the first (or second) binding unit 47, 51, the control means 95 stores the sheet bundle that has been subjected to the binding process by the sheet bundle carrying-out means in the first tray 49 on the downstream side (St18). . The stacking height is detected by a paper level detection sensor (not shown) arranged on the first tray 49, and when it exceeds a predetermined angle, the first tray 49 is lowered (St20). Next, the control means 95 determines whether there is a next job (St21) and completes the operation.

  The jog sorting paper discharge mode will be described with reference to FIG. The control means 95 temporarily stops the sheet (St22 to St24) sent to the carry-in entrance 26 of the sheet carry-in path 28 at the punching position when the punching process is designated (St25) (St26). To do. Then, the punch unit 100 is moved in the direction perpendicular to the sheet discharge (St27), the side edge of the sheet is detected by the sensor, and after the predetermined punching position is determined, the punch unit 100 is stopped and the punching operation is executed (St28). )

  Next, the control means 95 rotates the roller unit in the paper discharge direction in order to carry out the sheet from the third paper discharge path 30 to the third tray 71 (St29) (St30). Then, when the sheet is an even page (St31, St32), the roller unit is stopped (St33), and the sheet is moved by an offset amount set in advance in the discharge orthogonal direction with the sheet nipped (St34). Thereafter, the control means 95 again rotates the roller unit in the paper discharge direction (St35). At this time, the first path switching means 33 is shifted in the direction of guiding the sheet from the carry-in entrance 26 to the third paper discharge path 30, and the sheets are stacked on the third tray 71 (St36).

  The bookbinding processing paper discharge mode will be described with reference to FIG. The sheet on which an image is formed in the same manner as described above is guided to the sheet carry-in path 28. The sheet is guided from the carry-in entrance 26 to the second processing unit B2, and is abutted and regulated by the leading end regulating stopper 67. At this time, the control means 95 has previously received information on the sheet discharge direction size from the image forming apparatus A and has set the position of the leading edge regulating stopper 67.

  The sheets accumulated in the second processing unit B2 are bound by moving the binding unit (saddle stitching unit) to the center of the sheet in response to a job end signal from the image forming apparatus A. The sheet bundle is moved to the folding position when the binding process such as one or two places is completed, and the folding roll 64 is rotated. When the folding blade 65 enters the folding direction and rotates the folding roller 64 by a predetermined amount, the folding blade 65 is retracted. Then, the folding processing sheet is sent out in the paper discharge direction by the paper discharge roller 69 on the downstream side and stored in the second tray 61.

26 Carry-in entrance 27 Apparatus housing 28 Sheet conveyance path 37 Processing tray 47 Binding means 49 Stack tray 70 Apparatus frame 70f Side frame (front side)
70r side frame (rear side)
73f Front cover (open / close cover)
73r Rear cover 77 Manual feed setting portion 77a Slit-shaped opening 100 Punch unit 101 Punch members (101a to 101e)
102 Unit frame 103 Drive cam 104 Waste box 105 Guide rail 106 Rotating operation member 107 Rotating shaft 108 Guide rail 109 Rack 110 Pinion M7 Drive motor M8 Shift motor (shift means)

Claims (10)

A sheet processing apparatus for processing a sheet,
A set unit in which a sheet bundle from the outside of the apparatus is set;
A conveyance path for conveying the sheet;
Are arranged at positions different from that of the set portion, a stacking means for stacking transported sheet from the front Ki搬 feed path,
A binding unit that binds the sheet bundle set in the set unit and the sheet bundle stacked on the stacking unit;
Placed before Ki搬 feed path has a perforating means for perforating the sheet, and
Oite in the direction of sheet before Ki搬 feed path intersects the conveyance direction that will be conveyed, the mounting portion is disposed so as to overlap with the opening means,
Sheet processing apparatus, characterized in that. The punching means is configured to be movable in the intersecting direction,
The set portion is arranged so as to overlap with the moving region of the punching means in the intersecting direction in the intersecting direction,
The sheet processing apparatus according to claim 1. Having detection means for detecting the edge of the sheet;
Based on the detection result by the detection means of the edge of the sheet conveyed to the conveyance path, the punching means moves to a punching position for punching the sheet.
The sheet processing apparatus according to claim 2. The binding unit is configured to be movable between a first position for binding the sheet bundle set in the setting unit and a second position for binding the sheet bundle stacked on the stacking unit .
Sheet processing apparatus according to any one of claims 1 to 3, characterized in that. The perforation means can have a jam release member is operated when the jam clearance operation is performed,
The jam release member is disposed so as to overlap the set surface in the intersecting direction .
Sheet processing apparatus according to claim 1, any one of 4, characterized in that. The perforating means includes
Said piercing member for piercing a sheet; and
The piercing member, to the opposite direction to the drilling direction and the drilling direction when drilling a sheet, a moving means for reciprocally moving by rotating,
Have
Previous Article catcher arm release member is said moving means a member causes rotation,
Sheet processing apparatus according to claim 5, characterized in that. Having a cover which in an operational state the jam releasing member in Hirakijo state,
Sheet processing apparatus according to claim 5 or 6, characterized in that. Placed before Ki搬 feed path has a rotary conveying means for conveying the sheet in the transport direction by rotating,
It said rotary transport means is a shall be moved in a direction intersecting front SL sheets by moving in the intersecting direction,
The punching means is disposed downstream of the rotary conveying means with respect to the conveying direction .
Sheet processing apparatus according to any one of claims 1 7, characterized in that. The set unit sets a sheet bundle that is manually inserted from the outside of the apparatus.
The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus. An image forming apparatus for forming an image on a sheet;
A processing unit for processing the sheet sent from the image forming apparatus,
Consisting of
Wherein the processing unit, an image forming system, which is a sheet processing apparatus according to any one of claims 1 to 9.