JP2009001346A - Sheet post-processing device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet post-processing device capable of efficiently releasing jamming of needles when the needles are jammed, and an image forming device with this sheet post-processing device. <P>SOLUTION: In this sheet post-processing device, rotary means comprising a unit rotary knob 98 and a rotary part 100 is installed to a saddle stitching staple unit 81 with a stapler 112 for saddle stitching a bundle of sheets with a needle, and is mounted to a shaft member 102 via the rotary part 100, so as to rotatably hold the saddle stitching staple unit 81 inside the device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sheet post-processing apparatus and an image forming apparatus provided in a subsequent stage of an image forming apparatus or the like.

  Conventionally, paper that has been subjected to processing such as binding, punching holes, folding a bundle of sheets that have undergone saddle stitching, etc., on paper on which an image has been formed by an image forming apparatus such as a copier, printer, or facsimile machine Post-processing devices are known. These paper post-processing devices include a normal paper post-processing device that discharges a normal image-formed paper or a sorted paper bundle as it is to a paper stacking tray arranged at the upper side of the casing, and a plurality of sheets. A sheet folding process device is provided that performs bookbinding on the sheet bundle and discharges it to a dedicated sheet bundle stacking tray.

  The normal sheet post-processing apparatus includes a stapler that binds one or two ends of one side of the sheet bundle. On the other hand, the sheet folding processing apparatus binds the center part of the sheet bundle in two places. A saddle stitch stapler is provided.

  When a binding operation is performed with such a stapler, the staple of the stapler may eventually disappear or a staple jam may occur when binding a bundle of sheets. When trying to replenish such staples and release the staple jam, the stapler is located behind the machine body, so the visibility is poor and it takes time to replenish the needle and release the staple jam. There was a problem that.

To solve this problem, the stapler of the normal paper post-processing apparatus is provided in the movable holding means for pulling out the stapler from the inside of the apparatus main body to the pulling position, and further, the stapler is rotated to a predetermined position at the pulling position. A paper post-processing apparatus having a guide member that can be made has been proposed (see, for example, Patent Document 1).
JP-A-9-48556

However, in the conventional paper post-processing apparatus of the conventional paper post-processing apparatus, each process is performed after the stapler is once pulled out from the inside of the apparatus main body. If the staple punching part of the stapler gets stuck in the stapler and the staple punching part of the stapler does not return to its original position, the stapler cannot be pulled out from the main body, and the jam of the needle cannot be released. There was a problem. Accordingly, the stapler unit used in the normal sheet post-processing apparatus and the stapler unit used in the sheet folding apparatus are different in configuration, but the stapler of the conventional normal sheet post-processing apparatus is the saddle stitching stapler of the sheet folding apparatus. Even if this is applied, it is not possible to release the jam of the needle in the sheet folding device.
Further, in the conventional normal paper post-processing device, since the end of the paper bundle is bound by the stapler, there are cases where the paper bundle can be pulled out and released when the staple jams. Then, since the center portion of the sheet bundle is saddle-stitched by the saddle stitching stapler, it takes time to pull out the sheet bundle unless one of the jams on the paper side or the needle ejection portion side of the staple is first released.

  Accordingly, an object of the present invention is to provide a paper post-processing device capable of efficiently releasing a jam of a needle when a needle jam occurs, and an image forming apparatus including the paper post-processing device.

  In order to achieve the above object, a paper post-processing apparatus according to the present invention has a positioning means that moves up and down along a vertical conveyance path inside the apparatus main body to position a sheet bundle, and faces the vertical conveyance path. A saddle stitching means for saddle stitching the sheet bundle positioned by the positioning means with a needle; and a pivot means for holding the saddle stitching means so as to be pivotable inside the apparatus main body. It is a feature.

  In order to achieve the above object, the paper post-processing apparatus according to the present invention faces a positioning means that moves up and down along the vertical conveyance path inside the apparatus main body to position the sheet bundle, and faces the vertical conveyance path. A saddle stitching means for saddle stitching the sheet bundle positioned by the positioning means with a needle, a rotation means for rotatably holding the saddle stitching means within the apparatus main body, and the rotation And a sliding means which is provided in the moving means and holds the saddle stitching means so as to be slidable in a direction perpendicular to the turning direction of the turning means.

  Further, in order to achieve the above object, the sheet post-processing apparatus of the present invention is characterized by comprising a rotation holding means for holding the saddle stitching means in a state of being rotated by a predetermined angle.

  Furthermore, in order to achieve the above object, the sheet post-processing apparatus of the present invention is characterized in that it includes a sliding restriction unit that is slidable when the saddle stitching unit is rotated by the predetermined angle.

  According to the present invention, it is possible to provide a paper post-processing device that can efficiently release a jam of a needle when a paper jam occurs, and an image forming apparatus including the paper post-processing device.

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

[First Embodiment]
FIGS. 1 to 3 are schematic configuration diagrams showing a first embodiment according to the present invention. FIG. 1 is a schematic configuration diagram of an image forming apparatus. FIG. 2 is a schematic configuration diagram of a sheet post-processing apparatus. FIG. 3 is an enlarged schematic configuration view around the staple unit.

  As shown in FIG. 1, the image forming apparatus 1 includes an image reading unit 2 that reads an image to be read and an image forming unit 3 that forms an image. In addition, the image forming apparatus 1 is provided with a paper post-processing device 4 that performs various processing of paper after image formation.

  The image reading unit 2 includes a transparent document placing table 5, a carriage 6, an exposure lamp 8 provided on the carriage 6, a reflection mirror 10, an imaging lens 11 for converging the reflected light, and taking in the reflected light to obtain image information by the light. A CCD (Charge Coupled Device) 12 for converting to an analog signal is provided.

  The image forming unit 3 includes a photoconductor 16, a laser unit 14 that forms an electrostatic latent image on the photoconductor 16, a charging device 18 that is sequentially distributed around the photoconductor 16, a developing device 20, a transfer device 22, A cleaner 24 and a static elimination lamp 26 are provided.

  When light is applied from below the document placing table 5 to the document placed on the document placing table 5 or the document sent by the automatic document feeder 28 from the lower side of the document placing table 5 by the exposure means including the carriage 6 and the exposure lamp 8. The reflected light is guided by the reflecting mirror 10, converged by the imaging lens 11, and the reflected light image is projected onto the CCD 12. The image information captured by the CCD 12 is output as an analog signal, converted into a digital signal, subjected to image processing, and then transmitted to the laser unit 14.

  When image formation starts, the charging device 18 discharges at a predetermined discharge position and supplies a predetermined charge to the outer peripheral surface of the rotating photoconductor 16. A laser beam is irradiated from the laser unit 14 to the outer peripheral surface of the photosensitive member 16 charged to a uniform potential in the axial direction by the charging device 18 in accordance with image information transmitted from the CCD 12. When the electrostatic latent image corresponding to the image information of the original is formed and held on the outer peripheral surface of the photoconductor 16 by irradiation with the laser beam, a developer (for example, toner) is formed on the outer peripheral surface of the photoconductor 16 by the developing device 20. ) And the electrostatic latent image is converted to a toner image, ie developed.

  A developing roller (not shown) is rotatably provided in the developing device 20, and the developing roller is disposed so as to face the photoconductor 16 and rotates to supply toner to the photoconductor 16. When the toner image is formed on the outer peripheral surface of the photoconductor 16, the image is electrostatically transferred by the transfer device 22 onto the paper conveyed from the paper feeding device 30 through the conveyance path 31. Thereafter, the sheet is conveyed to the fixing device 34 via the conveying belt 32, and the toner image transferred onto the sheet is fixed on the sheet by the fixing device 34, that is, fixed. The paper on which the image formation is completed by fixing the toner image is discharged from the image forming apparatus 1 by the discharge roller 35 and sent to the paper post-processing apparatus 4.

  On the other hand, after the toner remaining on the photoconductor 16 that has not been transferred is removed by the cleaner 24 positioned downstream of the transfer device 22 in the rotation direction of the photoconductor 16, the residual charge on the outer peripheral surface of the photoconductor 16 is reduced. , And is removed by the static elimination lamp 26.

  Next, the paper post-processing apparatus 4 according to the first embodiment of the present invention will be described.

  As shown in FIG. 2, the paper post-processing device 4 performs post-processing on paper carried out from the image forming apparatus 1 in accordance with an input instruction from the operation panel of the image forming apparatus 1 or a print instruction from the PC. A finisher unit (ordinary sheet post-processing device) 40 that performs post-processing other than the half-folding process and the saddle stitching process, for example, a normal printing process and sorting, and a sheet bundle end binding process, and a half-folding process and a saddle stitching process. A saddle unit (sheet folding processing device) 42 is provided.

  The finisher unit 40 includes a second branching member 50 that switches the conveyance path according to the sheet printing process, a first sheet stacking tray 54 on which normal printing sheets are stacked, and a time required for binding processing and sheet unloading. The intermediate standby tray 58 for storing the temporarily conveyed sheets, the first processing tray 62 for placing the bundle of sheets to be bound, and the stapler 64 for binding the bundle of sheets. A second paper stacking tray 68 that can be driven up and down is provided on which a bundle of sheets subjected to binding processing and sorting processing is stacked.

  The saddle unit 42 has a first branching member 46 that switches the conveyance path according to the printing process of the paper, a second processing tray 72 that is arranged substantially vertically, and a first that determines the paper conveyance path according to the paper size. The first sheet deflecting plate 74 and the second sheet deflecting plate 76 are provided. Below the second processing tray 72, a straight vertical conveyance path (hereinafter referred to as “straight path”) 79 composed of guides 79 a and 79 b provided substantially vertically is disposed. A sheet folding device 90 comprising a pair of folding rollers 88 and a folding plate 89, a saddle stitching staple unit (saddle stitching device) 81 and an anvil 83, and a stopper 80 for receiving the leading edge of the sheet that has entered the linear path 79. Is arranged. Further, the saddle unit 42 includes a dedicated sheet bundle stacking tray 94 on which the sheet bundle folded by the sheet folding means 90 is stacked. Here, since the saddle stitching staple unit 81 includes a stapler therein, it is referred to as a saddle stitching staple unit or a saddle stitching stapler unless otherwise specified.

  In the sheet post-processing apparatus 4, the sheet discharged from the image forming apparatus 1 is carried into the sheet post-processing apparatus 4 by the entrance roller 44.

  In normal printing without special post-processing, the conveyance path is deflected by the first branch member 46 and the sheet is conveyed to the first conveyance roller 48 in the finisher section 40. Subsequently, the sheet is deflected by the second branch member 50, conveyed in the direction of the carry-out roller 52, and then discharged and stacked on the first sheet stacking tray 54 by the carry-out roller 52.

  In the case of performing the folding process or the sort process when printing the number of copies without performing the middle folding process or the saddle stitching process, first, the sheet is deflected in the conveyance path by the first branch member 46, and the finisher is processed. It is conveyed to the conveyance roller 48 in the section 40. Subsequently, the sheet is deflected by the second branch member 50, conveyed in the direction of the conveyance roller 56, and then sent to the standby tray 58 by the conveyance roller 56.

  The standby tray 58 includes a pair of standby tray parts (not shown) that can move to the left and right, and receives paper in a state in which the standby tray parts are closed. This standby tray 58 adjusts the flow of the paper by temporarily accumulating a predetermined number of sheets that are sequentially conveyed, and carries out the sheet discharge and the end of the sheet bundle that are performed downstream of the sheet conveyance path described later. By securing the time required for binding, paper post-processing is smoothed. The standby tray roller 60 is for aligning sheets accumulated in the standby tray 58.

  Subsequently, when a predetermined number of sheets are accumulated in the standby tray 58, the standby tray components are opened, and the sheet bundle falls to the first processing tray 62 due to its own weight. The sheet sent to the first processing tray 62 is aligned vertically and horizontally by an alignment member (not shown).

  When binding a bundle of sheets, when a predetermined number of sheets are aligned and accumulated in the first processing tray 62, the stapler 64 performs a binding process. The sheet bundle subjected to the binding process by the stapler 64 is carried out and loaded onto the second sheet stacking tray 68 by the transport mechanism 66.

  When only the sorting process is performed, the sheets fed to the first processing tray 62 and aligned are not subjected to the binding process by the stapler 64, and are transported and stacked on the second sheet stacking tray 68 by the transport mechanism 28. Is done.

  On the other hand, when the half-folding process or the saddle stitching process is performed, the sheet conveyed to the sheet post-processing device 4 by the entrance roller 44 is first deflected by the first branch member 46 and the saddle unit section It is conveyed to the third conveyance roller 70 at 42. Further, the paper conveyance path is determined by the first paper deflection plate 74, the second paper deflection plate 76, and the guide member 78 in accordance with the paper size. For example, when the paper is A3 size, the first paper In front of the deflection plate 74, the conveyance path indicated by the arrow X passes through the gap between the first paper deflection plate 74 and the guide member 78 when the paper is B4 size. When the sheet is A4 size, the sheet is sent to a straight path 79 disposed substantially vertically below the second processing tray 72 via the conveyance path indicated by the arrow Z along the guide member 78. The tip is received by the stopper 80. The other end of the sheet whose leading edge is received by the stopper 80 is located in the second processing tray 72, and the sheets conveyed along the conveying paths indicated by the arrows X, Y, and Z are sequentially transferred to the second processing tray 72. It is piled up. At this time, the stopper 80 is arranged at a position where the center (black dot of A) of the sheet bundle represented by A in FIG. 2 matches the binding position where the sheet is stapled by the saddle stitching staple unit 81.

  Here, as shown in FIG. 3, the stopper 80 is provided with a rack 86 and a pinion gear 87 meshing with the rack 86. By transmitting power to the pinion gear 87 from a motor (not shown), The stopper 80 can move up and down along the straight path 79. The stopper 80 is a positioning unit that performs positioning when stapled by the saddle stitching staple unit 81 and folding when the sheet bundle A is folded by the sheet center folding unit 90. 79 and the storage means for temporarily storing the conveyed paper. The sheet bundle is aligned vertically and horizontally by a stopper 80 and a lateral alignment member (not shown).

  When a predetermined number of sheets are aligned and accumulated in the stopper 80, the sheet bundle A is subjected to binding processing at the center by the saddle stitching staple unit 81 and the anvil 83.

  When the binding process is performed on the sheet bundle, the stopper 80 is raised until the center portion where the binding process of the sheet bundle A is performed is at the position of the folding plate 89 of the sheet folding means 90.

  The folding plate 89 is normally retracted to the outside of the linear path 79 from the guide 79b so as not to hinder the conveyance of the sheet, and moves when the folding process is performed on the sheet bundle, and strikes the central portion of the sheet bundle A. Thus, they are pushed out toward the pair of folding rollers 88 that are in pressure contact with each other.

  Accordingly, when the sheet bundle A is raised by the stopper 80 and the folding position (the center portion subjected to the binding process) reaches the position of the folding plate 89, the folding plate 89 projects the center portion of the sheet bundle A and the folding roller. Pushing in the direction of the pair 88, the folding roller pair 88 nips the sheet bundle A and conveys it narrowly, and folds it in two at the folding position.

  A sheet bundle (hereinafter referred to as a half-folded sheet bundle) that has been subjected to folding processing by the sheet folding device 90 is conveyed to a carry-out roller 94 through a conveyance path 92, and then a dedicated sheet bundle stacking tray by the carry-out roller 94. Ejected to 96 and loaded.

  Next, the staple unit 81 according to the first embodiment of the present invention will be described. FIG. 4 is a schematic diagram for explaining the operation of the stapling unit according to the first embodiment of the present invention. FIG. 4 (a) shows a state where the staple unit is fixed at a position where normal binding processing is performed. FIG. 4B shows a state where the fixing is released and the rotation is performed.

  As shown in FIG. 4, the saddle stitching staple unit 81 includes a rotating means including a unit rotating knob (rotating knob) 98 and a rotating portion 100, and the rotating portion 100 rotates the rotating shaft member 102. It is mounted movably. Further, the saddle stitching staple unit 81 is provided with sliding means including a rotating part 100 and a shaft member 102, and the rotating part 100 is slidable along the shaft member 102. Further, inside the saddle stitching staple unit 81, two saddle stitching staplers (not shown) are arranged at the front and back of the drawing. In the figure, reference numeral 108 denotes a needle launch portion of the saddle stitching stapler.

  As shown in FIG. 4A, the saddle stitching staple unit 81 is normally fixed at a position where a binding process can be performed. At this time, the saddle stitching staple unit 81 is fixed by a fixing member (fixing means) 104 that engages with the unit rotation knob 98. Therefore, when the saddle stitching staple unit 81 is rotated, the fixing member 104 is rotated in the direction of arrow (i) in FIG. Manually rotate in the direction of arrow (ii) of 4 (b).

  Reference numeral 106 denotes a rotation stopper that fixes the saddle stitching staple unit 81 together with the fixing member 104. Therefore, in the saddle stitching staple unit 81 of the present embodiment, the needle ejecting portion 108 moves away from the sheet bundle A from the normal arrangement position represented by the dotted line in FIG. Only rotate. The rotation fulcrum 105 of the fixing member 104 is attached to the apparatus main body 110.

  Next, the usage status of the rotation function of the saddle stitching staple unit 81 of the present embodiment will be briefly described. During the binding process of the bundle of sheets, for example, when the bundle of sheets is bound by the saddle stitching staple unit 81, a jam of the staple occurs such that the staple is stuck in the staple ejecting portion 108 with the needle stuck in the sheet. In this case, the staple driving portion 108 of the stapler cannot be returned to the original position. Usually, since the saddle stitching process is automatically performed, it is necessary to manually cancel the jam of the needle when the jam occurs.

  Therefore, the fixing member 104 is first rotated to release the fixing of the saddle stitching staple unit 81, and then the saddle stitching staple unit 81 is manually rotated in the direction of the arrow (ii) using the unit rotation knob 98. The jam of at least one needle on the side of the needle stuck in the paper or the side clogged with the needle launching unit 108 is released.

  When the needle is stuck in the needle launching portion 108, the unit rotation knob 98 is pulled forward, the saddle stitching staple unit 81 is pulled out from the apparatus main body 110 using a guide rail (not shown), and then the needle When the needle clogged in the ejecting unit 108 is removed and the needle is stuck in the sheet bundle, the sheet bundle is removed from the storage unit including the stopper 80, the second processing tray 72, and the linear path 79. When the jam of the needle is released, the saddle stitching staple unit 81 is returned to its original position and fixed by the fixing member 104.

  According to the paper post-processing apparatus of the first embodiment, since the saddle stitching staple unit 81 can be rotated away from the paper bundle without being pulled out from the apparatus main body 110, a jam of the needle occurs. At this time, it is possible to release at least one of the jams on the side of the needle stuck in the paper or the side jammed in the needle launching unit 108. Therefore, when the saddle stitching staple unit 81 is rotated and the needle is stuck in the needle launching portion 108, the needle launching portion 108 is pulled out after the saddle stitching staple unit 81 is pulled out from the apparatus main body 110. The needle jammed in the paper can be removed, and when the needle is stuck in the paper bundle, the paper bundle can be easily removed, so that the jam can be efficiently released.

  Further, although the saddle stitching staple unit 81 is rotatably attached to the rotating shaft member 102 by the rotating portion 100, the present invention is not limited to this, and the rotating portion 100 and the shaft member 102 are fixed. In addition, the shaft member 102 may be installed on a device frame (not shown) so as to be rotatable and slidable.

[Second Embodiment]
FIG. 5 is a schematic configuration diagram of the sheet post-processing apparatus according to the second embodiment of the present invention. Hereinafter, the same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In the saddle unit 42 of the present embodiment, as shown in FIG. 5, the sheet folding device 90 including the folding roller pair 88 and the folding plate 89, the saddle stitching staple unit 81, and A stopper 80 for receiving the leading edge of the paper that has entered the anvil 83 and the straight path 79 is disposed.

  Therefore, in the configuration of the sheet post-processing apparatus as in the present embodiment, in order to perform the folding process on the sheet bundle having a small sheet size subjected to the binding process by the saddle stitching staple unit 81 and the anvil 83, When the stopper 80 is raised until the portion reaches the position of the folding plate 89 of the sheet folding device 90, as shown in FIG. 5, the stopper 80 moves to a position where it overlaps with the saddle stitching staple unit 81 perpendicularly to the conveying direction. There is a case.

  In the present embodiment, when any abnormal state occurs and the stopper 80 stops in the above state, the saddle stitching staple unit 81 can be pulled out from the apparatus main body 110 while avoiding the stopper 80. The configuration will be described. FIG. 6 is a perspective view showing the periphery of the saddle stitching staple unit according to the second embodiment of the present invention, and shows a state in which the stopper 80 has moved to a position that overlaps with the saddle stitching staple unit 81 in a direction perpendicular to the conveying direction. Show. FIG. 7 is a schematic view of the periphery of the staple unit according to the second embodiment of the present invention, as viewed from the direction of arrow B in FIG. In FIG. 6, the saddle stitching staple unit 81 is indicated by a dotted line, and the guide 79 a forming the straight path 79 in FIG. 6 and the fixing member 105 in FIGS. 5 to 7 are omitted.

  As shown in FIG. 6, the saddle stitching staple unit 81 includes two saddle stitching staplers 112 inside. Further, the saddle stitching staple unit 81 includes a rotation means including a unit rotation knob 98 and a rotation unit 100, and is attached to the shaft member 102 by the rotation unit 100 so as to be rotatable. Further, the saddle stitching staple unit 81 is provided with sliding means including a rotating part 100 and a shaft member 102, and the rotating part 100 is slidable along the shaft member 102. Further, the stopper 80 is movable in the direction of arrow C (conveyance direction) in FIGS.

  In the guide 79a, rotation holding members (rotation holding means) 114a, 114b having convex portions for holding the rotation of the rotated saddle stitching staple unit 81 at the arrangement position of the saddle stitching staple unit 81 are provided. 114c (or the rotation holding member 114) is provided in parallel to the shaft member 102 and in a straight line. The rotation holding members 114a, 114b, and 114c are arranged at predetermined intervals, and the stapler 112 is arranged between 114a and 114b and between 114b and 114c, respectively. The height H1 of the convex portion of the rotation holding member 114 is formed higher than the height H2 of the stopper 80 protruding toward the saddle stitching staple unit 81 from the guide 79a. Further, the shape of the saddle stitching staple unit 81 on the straight path 79 side is a shape that does not hinder the arrangement of at least the stopper 80 and the rotation holding members 114a, 114b, and 114c. In this embodiment, as an example, It has a concave shape.

  When pulling out the saddle stitching staple unit 81 from the apparatus main body in the above state, first, the fixing member 104 (not shown) is rotated to release the fixing of the saddle stitching staple unit 81 as in the first embodiment, Using the unit rotation knob 98, the saddle stitch staple unit 81 is manually rotated by a predetermined angle. Subsequently, the saddle stitching staple unit 81 is pulled forward while being rotated, the stapler 112 is placed on the convex portion of the rotation holding member 114, and the unit rotation knob 98 is further pulled in this state, whereby the saddle stitching staple stapled. The unit 81 is pulled out from the apparatus main body. On the contrary, in the present embodiment, the saddle stitching staple unit 81 is configured to be slidable only by a predetermined angle rotation by the convex portion of the rotation holding member 114, and the rotation holding member 114 slides. It is also a limiting means.

  According to the sheet post-processing apparatus of the second embodiment, the saddle stitching staple unit 81 can be rotated away from the sheet bundle without being pulled out from the apparatus main body 110. The same effect as the form can be obtained. In addition, by using the rotation holding member 114, the rotation state of the saddle stitching staple unit 81 can be easily held, and the saddle stitching staple unit 81 is pulled out regardless of the stop position of the stopper 80. It is easy to maintain.

  Further, the rotation means of the saddle stitching staple unit 81 is not limited to the above configuration. For example, a configuration in which one end of the unit rotation knob 98 fixed to the saddle stitching staple unit 81 is rotatably attached to the shaft member 102 may be employed. In this case, the rotation part 100 is formed at one end of the unit rotation knob 98, and the sliding means is formed from the unit rotation knob 98, the rotation part 100, and the shaft member 102.

  Further, the fixing means of the saddle stitching staple unit 81 is not limited to the fixing member 104 or the rotation stopper 106, and a generally considered fixing means may be used.

  Further, in the second embodiment, the rotation holding member 114 is not limited to the above-described configuration provided in the guide 79a, and at least the rotation of the saddle stitching staple unit 81 so that the stopper 80 can be avoided. A generally conceivable holding means capable of holding can be used.

[Modification of Second Embodiment]
In the second embodiment, the rotation holding member 114 is provided in order to hold and pull out the rotation of the rotated saddle stitching staple unit 81, and it is slid to not rotate at a predetermined angle. The convex portion of the rotation holding member 114 also serves as a sliding restriction unit so that it cannot be pulled out. However, the rotation holding member and the sliding restriction unit are not limited to the above embodiment.

  In the present embodiment, as shown in FIG. 8, the shaft member 102 is fixedly disposed so as not to rotate on a device frame (not shown), and the shaft member 102 has a convex portion 120. .

  Further, the rotating portion 100 of the saddle stitching staple unit 81 is provided with a recess (fitting portion) 122 into which the convex portion 120 enters when the saddle stitching staple unit 81 is rotated by a predetermined angle. Therefore, the saddle stitching staple unit 81 rotates and the saddle stitching staple unit 81 rotated by the convex portion 120 entering the concave portion 122 is held at a predetermined angle. That is, the convex part 120 and the concave part 122 function as rotation holding means. The angle of the predetermined rotation position is at least an angle at which the saddle stitching staple unit 81 can avoid the stopper 80.

  When the saddle stitching staple unit 81 is pulled out from the apparatus main body, the saddle stitching staple unit 81 is manually rotated by a predetermined angle using the unit rotation knob 98, and the saddle stitching staple unit 81 is rotated forward. The projection 120 and the recess 122 are fitted to each other. By further pulling the unit rotation knob 98 in this state, the concave portion 122 is slid with respect to the convex portion 120, and the saddle stitching staple unit 81 is pulled out from the apparatus main body. In other words, in the present embodiment, the saddle stitching staple unit 81 is configured to be slidable by the convex portion 120 and the concave portion 122 that are the rotation holding means unless it is rotated by a predetermined angle. Reference numeral 122 also serves as a sliding restriction means. The recess 122 may have a shape that is relatively larger than the protrusion 120.

  Further, the rotation holding means is not limited to the structure that also serves as the sliding restriction means, and as shown in FIGS. 9A and 9B, the apparatus main body 110 is provided with a protruding member 124. There may be. That is, the saddle stitching staple unit 81 is rotated by a predetermined angle, pulled as it is, and the saddle stitching staple unit 81 is placed on the protruding member 124 to hold the rotation. In this case, the convex portion 120 and the concave portion 122 function as at least a sliding restriction unit, and the protruding member 124 functions as a rotation holding member (rotation holding unit). Thus, by providing the rotation holding means other than the convex part 120 and the concave part 122 of the shaft part 102, it is possible to prevent the force from being concentrated on the shaft part 102.

According to the sheet post-processing apparatus of the modified example of the second embodiment, the saddle stitching staple unit 81 can be rotated away from the sheet bundle without being pulled out from the apparatus main body 110. The same effect as in the embodiment can be obtained. In addition, by using the convex portion 120 provided on the shaft member 102 and the concave portion 122 that is provided in the rotary portion 100 and into which the convex portion 120 enters, as a configuration that functions as a rotation holding unit and a sliding restriction unit, The same effects as those of the second embodiment can be obtained.
Further, by providing a projection member 124 on the apparatus main body 110, rotating the saddle stitching staple unit 81 by a predetermined angle, pulling it forward as it is, placing the saddle stitching staple unit 81 on the projection member 124, and maintaining the rotation. Since the protruding member 124 functions as the rotation holding means, it is possible to prevent the force from being concentrated on the shaft portion 102.

  In addition, this invention is not limited to said embodiment, You may implement various deformation | transformation in the range which does not deviate from the summary.

1 is a schematic configuration diagram illustrating an image forming apparatus according to a first embodiment of the present invention. 1 is a schematic configuration diagram illustrating a sheet post-processing apparatus according to a first embodiment of the present invention. The schematic block diagram which expanded the staple unit periphery of 1st Embodiment which concerns on this invention. Schematic which shows operation | movement of the staple unit of 1st Embodiment based on this invention. FIG. 4A shows a state fixed at a position where a normal binding process is performed, and FIG. 4B shows a state where the fixation is released and rotated. The schematic block diagram which shows the paper post-processing apparatus of 2nd Embodiment which concerns on this invention. The perspective view which shows the structure around the saddle stitching staple unit of 2nd Embodiment which concerns on this invention. FIG. 7 is a schematic view of the vicinity of the staple unit according to the second embodiment of the present invention as viewed from the direction of arrow B in FIG. 6. The perspective view which shows the outline of a structure of the saddle stitching staple unit of the modification of the 2nd Embodiment which concerns on this invention. Schematic which shows operation | movement of the saddle stitching staple unit of the modification of the 2nd Embodiment which concerns on this invention. FIG. 9A shows a state at a position where a normal binding process is performed, and FIG. 9B shows a state where the fixing is released and the rotation is performed.

Explanation of symbols

1 Image forming device
3 Image forming section
4 Paper post-processing equipment
40 Regular paper post-processing device (finisher)
42 Paper folding machine (saddle unit)
72 Second processing tray
79 Straight vertical transport path (straight path)
79a, 79b Guide
80 stopper
81 Saddle Stapling Unit
88 Folding roller pair
89 Folding plate
90 Folding means for paper
98 unit rotary knob
100 Rotating part
102 Shaft member
104 Fixing member
112 stapler
114, 120, 124 Rotation holding member
A Paper bundle

Claims (9)

Positioning means for positioning the sheet bundle by moving up and down along the vertical conveyance path inside the apparatus body;
A saddle stitching means that is provided facing the longitudinal conveyance path and saddle stitches the sheet bundle positioned by the positioning means;
A rotating means for rotatably holding the saddle stitching means inside the apparatus main body;
A sheet post-processing apparatus comprising: Positioning means for positioning the sheet bundle by moving up and down along the vertical conveyance path inside the apparatus body;
A saddle stitching means that is provided facing the longitudinal conveyance path and saddle stitches the sheet bundle positioned by the positioning means;
A rotating means for rotatably holding the saddle stitching means inside the apparatus main body;
A sliding means provided in the turning means, and holding the saddle stitching means slidably in a direction perpendicular to the turning direction of the turning means;
A sheet post-processing apparatus comprising:   The sheet post-processing apparatus according to claim 2, further comprising a rotation holding unit that holds the saddle stitching unit in a state in which the saddle stitching unit is rotated by a predetermined angle.   4. The sheet post-processing apparatus according to claim 3, further comprising a sliding restriction unit that is slidable when the saddle stitching unit is rotated by the predetermined angle.   4. The sheet post-processing apparatus according to claim 3, wherein the rotation holding unit also serves as a sliding restriction unit that is slidable when the saddle stitching unit is rotated by the predetermined angle.   The said predetermined angle is an angle which can avoid at least the said positioning means, when the said saddle stitching means is slid irrespective of the position of the said positioning means. The paper post-processing apparatus according to any one of the above. The rotation means includes a rotation part that serves as a pivot point of rotation;
The sheet post-processing apparatus according to claim 1, further comprising a rotation knob for rotating the rotation portion about a fulcrum.   The sheet post-processing apparatus according to claim 1, further comprising a fixing unit that fixes the saddle stitching unit so as not to rotate. An image forming apparatus comprising: an image forming unit; and a sheet post-processing device that performs post-processing of a sheet on which an image is formed in the image forming unit.
The image forming apparatus according to claim 1, wherein the sheet post-processing apparatus is the sheet post-processing apparatus according to claim 1.

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