JP2006247836A - Paper cutting device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize enhancement of booklet cutting accuracy by preventing deviation of a position of a movable stopper for abutting a leading end of the booklet by vibration of other drive means at edges cutting treatment of the booklet. <P>SOLUTION: The paper cutting device is constituted by a motor M1 for driving conveying means 100, 200 for conveying the booklet SA; a motor M2 for driving the movable stopper 221 for stopping the booklet SA at a predetermined position; a motor M4 for driving a pressing member 240 for pressing the booklet SA; a motor M5 for driving a cutting means 300 for cutting the edges of the booklet SA; motors M6, M7 for driving a booklet storage means 400 for storing the cutting-treated booklet SA; and a control means 90 for controlling the respective motors. The control means 90 controls the motors of the means other than the cutting means 300 to non-operation when it drives the motor M5 of the cutting means 300. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sheet cutting device that cuts a small edge for aligning a small edge of a sheet after binding a sheet bundle by performing a saddle stitching process and a middle folding process, and an image forming apparatus including the sheet cutting apparatus. is there.

  Conventionally, Patent Document 1, Patent Document 2, Patent Document 3, and the like are known as sheet post-processing apparatuses that perform saddle stitching processing on a bundle of sheets that are a set of a plurality of sheets.

  Further, Patent Document 4, Patent Document 5, and the like have been proposed as a paper post-processing apparatus that can perform a folding process.

2. Description of the Related Art There is a paper cutting device that cuts a small edge in order to align the small edge of a sheet after bookbinding by performing saddle stitching processing and middle folding processing on the bundle of sheets. In recent years, paper bundles on which images have been recorded by image forming apparatuses such as copiers, printers, and multi-function machines have been subjected to saddle stitching processing and center folding processing by a paper post-processing device, and then bound like a weekly magazine. A sheet post-processing apparatus including a sheet cutting device that cuts the edge of the sheet so as to align the edge of the sheet by the sheet cutting apparatus is provided.
JP-A-6-72064 JP-A-7-187479 Japanese Patent Laid-Open No. 8-192951 Japanese Patent Laid-Open No. 10-148983 JP-A-10-167562

    A sheet cutting apparatus that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing or half-folding by a cutting means has the following problems.

<1> When driving the driving source of the cutting means, if the driving means other than the cutting means is operating, the cutting position of the booklet may be shifted due to the vibration of the other driving means. .

  <2> When cutting a booklet produced by performing saddle stitching and folding operations on a plurality of sheets, the amount of protrusion of the fore edge varies depending on the number of sheets per booklet. In this case, irregularities in the forehead due to insufficient cutting amount and waste of paper due to excessive cutting amount occur. Therefore, control is required to keep cutting scraps to the minimum necessary for each copy of the booklet.

  <3> When a booklet composed of a small number of sheets is cut, a cutting failure in which the sheet is inserted between the cutting upper blade and the cutting lower blade, a cutting position shift, or the like may occur. In particular, when the paper is thin, the paper is weak, or the sharpness of the cutting blade is lowered, cutting defects frequently occur. Since thin paper or the like that is likely to cause a cutting failure is used, if the cutting process is not automatically performed, control for notifying the user that the cutting process has not been performed is required.

  <4> There is a case in which a booklet produced by performing saddle stitching processing and half-folding processing on a plurality of sheets is desired to be discharged to the booklet storage unit without performing cutting processing.

  <5> When a cancel operation is performed during the image forming process or the post-processing process by the paper post-processing apparatus, if the saddle-stitched booklet is cut and discharged, Spending wasted time.

  <6> When the leading edge of the paper conveyed to the cutting means by the conveying means hits the stop member of the stop means, the stop means receives an impact, the stop position fluctuates, and the paper is not placed at an accurate position. There is.

  <7> In the conventional sequential conveyance method in which the subsequent booklet is started to be conveyed to the cutting processing unit after the booklet cutting process, the booklet cutting process time becomes long.

  <8> A desired cutting dimension is set regardless of the number of booklets so that the cutting process can be performed.

  The present invention solves the above-mentioned problems, improves the sheet cutting device, cuts the edge of the sheet bundle that has been subjected to the saddle stitching process and the two-fold process, and then discharges and stacks the finished booklet. It is an object of the present invention to improve operability, increase the capacity of a booklet, and reduce the size of a sheet cutting device.

  The above-described problems are achieved by the following sheet cutting apparatus of the present invention and an image forming apparatus including the sheet cutting apparatus.

  (1) The above problem <1> is solved by the sheet cutting apparatus according to claim 1 of the present invention.

  (2) The above problem <2> is solved by the sheet cutting apparatus according to claim 2 of the present invention.

  (3) The above problem <3> is solved by the sheet cutting apparatus according to claim 3 or 4 of the present invention.

  (4) The above problem <4> is solved by the sheet cutting apparatus according to claim 5 of the present invention.

  (5) The above problem <5> is solved by the sheet cutting apparatus according to claim 6 of the present invention.

  (6) The above problem <6> is solved by the sheet cutting apparatus according to claim 7 of the present invention.

  (7) The above problem <7> is solved by the sheet cutting apparatus according to claim 8 of the present invention.

  (8) The problem <8> is solved by the sheet cutting apparatus according to claim 9 of the present invention.

  (9) An image forming apparatus according to the present invention includes an image forming unit that forms an image on a sheet fed by a sheet feeding unit according to image information, and a sheet on which an image is formed by the image forming unit. An image processing apparatus comprising: a binding unit that performs binding processing; a sheet post-processing device that includes a folding unit that performs folding processing on a sheet that has undergone saddle stitching processing; and the sheet cutting device according to claim 1. The formed paper is folded in half and saddle-stitched to produce a booklet, and the booklet is finished by cutting the edge of the booklet by a cutting means.

  The sheet cutting device and the sheet post-processing apparatus of the present invention provide the following effects.

  (1) The sheet cutting apparatus of the present invention controls the drive sources of means other than the cutting means to be inactive when driving the drive source of the cutting means, and is a movable stopper due to the vibration of the other drive means. Can be prevented, and the accuracy of the booklet's trimming position can be stabilized.

  (2) The sheet cutting apparatus according to the present invention variably controls the booklet stop position of the stopping unit according to the number of sheets of the booklet conveyed to the cutting unit by the conveying unit, and the number of sheets of the booklet SA (the thickness of the booklet). Even if there is a difference in the protrusion amount of the forehead, the optimal cutting amount is always controlled, and a booklet without excessive cutting or insufficient cutting is produced.

  (3) The sheet cutting apparatus of the present invention displays that the cutting process is not automatically performed and the cutting process is not performed on the operation unit screen when the number of sheets of the booklet is set to a predetermined number or less. Yes, a problem that the cutting position of a small number of booklets is shifted is displayed on the operation unit screen to alert the user and prevent cutting defects that may occur when cutting a small number of booklets. be able to. Further, when the cutting process is not automatically performed, the user can be notified that the cutting process has not been performed.

  (4) The sheet cutting apparatus of the present invention, when selecting the cutting process execution, transports the booklet after the cutting process by the cutting means to the booklet storage means, and when selecting the cutting process non-execution by the cutting means. The booklet is controlled to be transported to the booklet storage means by the transport means without performing the cutting process, and the mode for accommodating the booklet in the booklet storage means can be arbitrarily selected without performing the cutting process. .

  (5) The sheet cutting apparatus according to the present invention controls the booklet to be conveyed to the booklet storing means by the conveying means without performing the cutting process by the cutting means when the cancel operation is performed during the image forming process. In addition, when a trouble occurs in the image forming apparatus or the sheet post-processing apparatus and the copy cancellation is performed, the booklet in the sheet cutting apparatus can be quickly discharged, and the cancel processing time can be shortened.

  (6) The sheet cutting device of the present invention holds the movable stopper in a fixed state by exciting the motor that drives the movable stopper immediately before the front end of the booklet conveyed by the conveying means hits the movable stopper. Therefore, it is possible to reduce the collision blur that occurs when the leading end of the booklet collides with the movable stopper, and to improve the accuracy of the booklet trimming position.

  (7) The paper cutting apparatus of the present invention transports a booklet that has been cut by the cutting means to the booklet storing means, and then carries the subsequent booklet into the cutting means to carry the booklet after the cutting process. Processing and subsequent booklet carry-in processing are performed simultaneously, and post-processing productivity can be improved by shortening the cutting processing time.

  (8) The sheet cutting device of the present invention sets the stop position of the stop member of the stop means so as to be adjustable in accordance with the arbitrarily set cutting amount, and arbitrarily adjusts the dimension that the user wants to cut. It becomes possible.

  (9) A sheet formed by an image forming apparatus such as a copying machine, a printer, or a multifunction machine of the present invention is subjected to saddle stitching and folding by a sheet post-processing apparatus, and the sheet is cut by a cutting unit of the sheet cutting apparatus. The booklets are evenly arranged and bound into booklets, and the booklets can be stacked in the booklet storage means.

(First embodiment)
An image forming apparatus including a sheet cutting apparatus, a sheet post-processing apparatus, and a sheet post-processing apparatus according to the present invention will be described with reference to the drawings.

  FIG. 1 is an overall configuration diagram of an image forming system including an image forming apparatus main body A, a sheet post-processing apparatus B, and a sheet cutting apparatus C.

  The illustrated image forming apparatus main body A includes an image reading unit 1, an image processing unit 2, an image writing unit 3, an image forming unit 4, a paper feeding cassette 5, a paper feeding unit 6, a fixing device 7, a paper discharging unit 8, and automatic duplexing. A copy paper feeder 9 is provided.

  An automatic document feeder D is mounted on the upper part of the image forming apparatus main body A. A sheet post-processing device (finisher) B and a sheet cutting device C are connected to the left side of the image forming apparatus main body A shown in the drawing on the paper discharge unit 8 side.

  The document d placed on the document table of the automatic document feeder D is conveyed in the direction of the arrow, and an image on one or both sides of the document is read by the optical system of the image reading unit 1, and is read by the CCD image sensor 1A.

  The analog signal photoelectrically converted by the CCD image sensor 1 </ b> A is subjected to analog processing, A / D conversion, shading correction, image compression processing, and the like in the image processing unit 2, and then sent to the image writing unit 3.

  In the image writing unit 3, output light from the semiconductor laser is irradiated onto the photosensitive drum 4 </ b> A of the image forming unit 4 to form a latent image. In the image forming unit 4, processes such as charging, exposure, development, transfer, separation, and cleaning are performed. The paper S fed from the paper feed cassette 5 by the paper feed means 6 is transferred to the paper S by the transfer means 4B. The paper S carrying the image is fixed by the fixing device 7 and sent from the paper discharge unit 8 to the paper post-processing device B. Alternatively, the single-sided image-treated paper S sent to the automatic double-sided copy paper feeding unit 9 by the transport path switching plate 8A is again discharged from the paper discharge unit 8 after double-sided image processing in the image forming unit 4 and the paper post-processing device In B, after the saddle stitching process and the half-folding process are performed, the sheet is fed into the sheet cutting apparatus C.

  The sheet cutting apparatus C is configured to trim the vicinity of the fore edge of the booklet SA that has been subjected to the saddle stitching process and the folding process by the sheet post-processing apparatus B as shown in FIG. This will be described in detail later.

  In the sheet post-processing apparatus B, a fixed sheet discharge tray 81, a cover sheet feeding unit 40, a shift processing conveyance unit 20, a first stacking unit 30, a binding unit 50, and a folding unit 60 are arranged in a substantially vertical direction from the top in the drawing. They are arranged in columns.

  An inlet conveyance unit 10 is disposed on the upper right side of the sheet post-processing apparatus B in the figure. In addition, on the left side of the sheet post-processing apparatus B in the figure, an elevating / discharging tray 82 for stacking sheets that have undergone end binding and shift processing is disposed.

  FIG. 2 is a schematic diagram illustrating a sheet conveyance path of the sheet post-processing apparatus B.

  The sheet post-processing apparatus B is installed with its position and height adjusted so that the inlet 11 of the sheet S transported from the image forming apparatus main body A matches the paper discharge section 8 of the image forming apparatus main body A.

  The conveyance path of the sheet S connected downstream of the sheet conveyance of the inlet section roller 12 of the inlet section 11 is branched into three systems: an upper first conveyance path R1, an intermediate second conveyance path R2, and a lower third conveyance path R3. The sheet S is fed to one of the transport paths by selecting the angle occupied by the switching gates G1 and G2.

(1) Non-staple, non-sort (first transport path R1)
The image-formed paper S discharged from the image forming apparatus main body A is introduced into the inlet portion 11 and conveyed by the inlet roller 12, and the conveyance direction length of the paper S is detected by the inlet portion sensor PS1. The sheet S passes through the passage 13 on the right side of the upper first switching gate G1, is sandwiched by the upper transport roller 14 and transport roller 15 and is transported upward, and is further sandwiched by the discharge roller 16 and the upper part outside the machine. Are discharged onto the fixed discharge tray 81 and sequentially stacked.

  In this sheet conveyance process, the switching gate G1 closes the path 17 and opens the path 13 to allow the sheet S to pass through the fixed sheet discharge tray 81.

(2) Shift processing or non-sorting (second transport path R2)
When this transport mode is set, the switching gate G1 closes the passage 13, holds the passage 17 in an open state, and allows the sheet S to pass through the passage 17.

  The image-formed paper S discharged from the image forming apparatus main body A passes through the entrance portion 11 and the entrance portion roller 12, passes through a passage 17 formed in an open state below the switching gate G1, and then is conveyed to the transport roller. 18 is passed through the passage 21 above the second switching gate G2 that is obliquely below the second transport path R2, and is sandwiched by the transport roller 22 via the passage 23, the shift means 25, the shift roller 24, is ejected by the ejection roller 26, and is stacked on a lifting / lowering tray 82 capable of storing a large amount of sheets.

(3) Edge binding processing (third transport path R3)
The sheet S to be subjected to the edge binding process or the saddle stitching process is subjected to image formation processing in the image forming apparatus main body A, and is sent to the inlet portion 11 of the sheet post-processing apparatus B, where the inlet roller 12 and the first switching gate G1 are fed. Passes through the lower passage 17, is sandwiched between the transport rollers 18, and is transported to the third transport path R <b> 3.

  In the third transport path R3, the sheet S passes through the passage 31 below the switching gate G2, and is sandwiched and transported by the downstream transport roller 32. The sheet S is further nipped by the downstream conveying roller 34 and sent out. The sheet S is discharged into the space above the intermediate stacker 35 disposed at an inclination of the first stacking unit 30 and stacked on the intermediate stacker 35 or the intermediate stacker 35. After touching the upper surface of S and sliding up, after the trailing edge of the paper S in the traveling direction is discharged from the transport roller 34, the paper S turns down due to its own weight and slides down on the inclined surface of the intermediate stacker 35. Then, the leading end of the sheet S in the advancing direction comes into contact with the sheet abutting surface of the end binding movable stopper member (hereinafter referred to as an end binding stopper) 51 in the vicinity of the binding means 50 and stops.

  Reference numeral 36 denotes a pair of upstream side width aligning means movably provided on both side surfaces of the intermediate stacker 35. The upstream side width aligning means 36 is movable in a direction orthogonal to the paper transport direction. When the paper S is discharged onto the intermediate stacker 35, it is opened wider than the paper width and transported on the intermediate stacker 35. When the sheet is stopped by abutting against the edge binding stopper 51, the side edge of the sheet S in the width direction is tapped to perform sheet bundle width alignment (width alignment).

  When a predetermined number of sheets S are stacked and aligned on the intermediate stacker 35 at this stop position, the binding means 50 performs a binding process, and the sheet bundle is bound.

  A plurality of discharge belts 38 wound around a drive pulley 37A and a driven pulley 37B are rotatably disposed on a part of the sheet stacking surface of the intermediate stacker 35. The bound sheet bundle is held on the trailing edge of the sheet S by the discharge claw 38a of the discharge belt 38, is placed on the discharge belt 38, and slides obliquely upward on the placement surface of the intermediate stacker 35. It is pushed up and proceeds to the nip position of the discharge roller 26. The sheet bundle sandwiched between the rotating discharge rollers 26 is discharged and stacked on the lifting / lowering tray 82.

(4) Cover feed (fourth transport path R4)
The cover sheet feeding unit 40 includes a cover sheet placement unit 41 and a cover sheet feeding unit 42.

  One cover sheet K fed from the cover sheet feeding means 40 passes through the passage 43, passes through the other nip position of the transport roller 14, passes through the path 19 and the transport roller 18, and then is transported to the third transport. It reaches the intermediate stacker 35 via the conveyance roller 32, the path 33, and the conveyance roller 34 in the path R3.

(5) Saddle stitching process (5th conveyance path R5)
The binding means 50 has a two-part structure of an upper mechanism 50A and a lower mechanism 50B, and a passage 52 through which the paper S can pass is formed in the middle.

  Two sets of binding means 50 are arranged in a direction orthogonal to the paper conveyance direction, and can be moved in a direction orthogonal to the paper conveyance direction by a driving means (not shown). By this binding means 50, the binding needles SP are hit at two central sorting positions in the paper width direction.

  When the saddle stitching mode is set and the size (length in the transport direction) of the cover sheet K and the sheet S is set or detected, the saddle stitching movable stopper member (hereinafter referred to as the saddle stitching stopper) 53 moves to a predetermined position. Then stop. In conjunction with the activation of the saddle stitching stopper 53, the end stitching stopper 51 is retracted and the passage 52 is opened.

  After the cover sheet K is placed at a predetermined position on the intermediate stacker 35, the sheet S carried out from the image forming apparatus main body A passes through the third conveyance path R3 from the inlet conveyance section 10 of the sheet post-processing apparatus B. Then, the sheets are sequentially stacked on the upper surface of the cover sheet K placed on the intermediate stacker 35, and the end portion of the sheet S is in contact with the saddle stitching stopper 53 and positioned. Reference numeral 56 denotes a downstream side width aligning unit that regulates the width direction of the sheet S during saddle stitching processing. Like the upstream side width aligning unit 36, each time a sheet S is carried in, the width direction side of the sheet S is shown. Width alignment is performed by hitting the edge.

  Further, at the time of saddle stitching processing, the upstream side width aligning means 36 is estimated when the sheet S hits the saddle stitch stopper 53 with respect to the paper S that is transported on the intermediate stacker 35 and proceeds upstream of the binding means 50. And the downstream side width aligning means 56 are simultaneously operated to perform sheet width alignment and align sheets.

  In this way, the sheet S and the cover sheet K that travel on the intermediate stacker 35 and extend over the upstream side and the downstream side with the binding unit 50 as the center are stacked on the upstream side width aligning unit 36 and the downstream side. The width aligning unit 56 accurately performs the width alignment over the entire length of the sheet S.

  After the final sheet S is positioned and placed on the intermediate stacker 35, the saddle stitching process is performed by the binding means 50 on the sheet bundle composed of the cover sheet K and all the pages of the sheet S. By the saddle stitching process, the binding needle is driven into the center portion in the transport direction of the cover sheet K and the sheet S. The binding needle SP is driven from the lower mechanism 50B having the binding needle driving drive side toward the upper mechanism 50A having the binding needle clinching side.

(6) Folding process (sixth transport path R6)
After the saddle stitching process, the saddle stitch stopper 53 swings to open the passage downstream of the passage 52. The sheet bundle composed of the cover sheet K and the sheet S subjected to the saddle stitching process is conveyed by being guided to the guide plate 63 by the conveyance belt 62 obliquely below through the curved path and the intermediate conveyance roller 61, and further, the second stacking. The sheet is conveyed on the section (stack base) 64, the leading end of the sheet bundle conveying direction comes into contact with the folding section movable stopper means 65, and stops at a predetermined position. The folding portion movable stopper means 65 can be moved to a predetermined position by setting or detecting the paper size and driving means.

  The folding means 60 includes a sheet ejecting means 66, a folding roller 67, a conveying belt 68, a pressure roller 69, and the like.

  In response to the folding start signal, the ejecting plate 66A of the paper ejecting means 66 advances obliquely upward, and the leading end of the ejecting plate 66A pushes up the central portion of the sheet bundle composed of the cover K and the sheet S, and passes through the sheet bundle. The nip portion of the folding roller 67 is pushed and swung and separated.

  After the leading end of the ejecting plate 66A passes through the nip portion, the ejecting plate 66A moves backward, and the central portion of the sheet bundle is pressed by the folding roller 67 to form a crease portion. This fold line coincides with the position where the binding needle is driven into the sheet bundle by the saddle stitching process. This saddle stitching and center folding process can process a maximum of 64 pages (16 sheets) of paper.

  The central portion of the sheet bundle formed with a fold portion by being pressed by a pair of rotating folding rollers 67 is sandwiched and transported by a pair of transport belts 68 and sent to the nip position of the pair of pressure rollers 69. After the crease part is further firmly attached at this position, the sheet is discharged.

  FIG. 3A is a plan view of a sheet showing a saddle stitching process in which the binding needle SP is struck at two central distribution points along a fold portion a in which the sheet S is folded in two, and FIG. FIG. 3C is a perspective view showing a state in which the post-processed booklet SA is double-opened, and FIG. 3D is a post-process that performs saddle stitching and bi-folding. It is sectional drawing of booklet SA. In these figures, b is the edge of the side edge of the paper S, and c is a cutting line for aligning the edges.

  The booklet SA produced by the saddle stitching process and the half-folding process has the first surface (p1, p8) of the cover K facing outward, the second surface (p2, p7) on the back side, and the contents on the inner side. A first surface (p3, p6) of a certain sheet S and a second surface (p4, p5) of the sheet S are arranged inside the sheet S, and a booklet consisting of eight pages (p1 to p8) can be aligned as shown in the figure. .

  When the booklet creation auto mode is selected and set in the operation unit of the image forming apparatus main body A, the cover K is loaded on the cover placing unit 41, and printing is started, the control unit of the image forming apparatus main body A performs the above-described operation. The image process is executed, and the sheet S carrying the image is subjected to the saddle stitching process and the half-folding process by the sheet post-processing apparatus B, and the booklet SA is continuously produced and discharged.

  In the operation section of the sheet post-processing apparatus B, the booklet production manual mode is selected and set, and the cover sheet K and an image-formed sheet S on the cover sheet stacking section 41 are stacked and sent out. When the operation starts, the control unit of the paper post-processing apparatus B performs the saddle stitching process and the bi-folding process on the cover sheet K and the paper S by the paper post-processing apparatus B, thereby producing and discharging one booklet. Is done.

  FIG. 4 is an overall configuration diagram of the sheet cutting apparatus C according to the present invention. The sheet cutting apparatus C includes a first transport unit (paper transport unit before cutting process) 100, a second transport unit (paper transport unit after cutting process) 200, a cutting unit 300, and a booklet storage unit 400.

  FIG. 5 is a cross-sectional view showing a sheet conveyance path of the sheet cutting apparatus C.

  The booklet SA that has been folded in half by the folding means 60 of the sheet post-processing apparatus B is discharged onto the transport belt 101 disposed at the entrance of the sheet cutting apparatus C. The conveyor belt 101 is rotatably supported by the support member 102 and is rotated by the driving roller 103.

  On the downstream side of the conveyance belt 101 in the sheet conveyance direction, a lower conveyance belt 111 wound around a driving roller 112 and a driven roller 113 is rotatably arranged. Above the lower conveyor belt 111, the upper conveyor belt 114 is in pressure contact and is driven to rotate. The upper conveyor belt 114 around which the rollers 115 and 116 are wound is supported by the support member 117 so as to be rotatable. The support member 117 is biased by a spring 118 and presses the upper conveyor belt 114 against the lower conveyor belt 111. The booklet SA conveyed by the conveyance belt 101 is conveyed by being pressed and sandwiched between the lower conveyance belt 111 and the upper conveyance belt 114.

  On the downstream side of the lower conveyance belt 111 in the sheet conveyance direction, a driving roller 121 connected to the driving unit and a driven roller 122 that rotates while being pressed against the driving roller 121 are arranged. The booklet SA sandwiched and transported between the lower transport belt 111 and the upper transport belt 114 passes through the guide plate 123 and is transported while being sandwiched between the driving roller 121 and the driven roller 122.

  On the downstream side of the driving roller 121 in the sheet conveying direction, a cutting upper blade 301, a cutting lower blade 302, a movable plate 310, a pressing roller 311, a waste box 320, and a cutting unit 300 including a driving unit are arranged. Details of the cutting means 300 will be described later.

  The booklet SA finished by cutting the fore edge b by the cutting means 300 is, in the second conveying means 200, the lower conveying belt 201 that rotates, the upper conveying belt 206 that rotates following, and the upper roller that rotates by driving. It is nipped by 205 and conveyed.

  The lower conveying belt 201 is rotated by a driving roller 202 connected to driving means. Reference numeral 203 denotes a driven roller that is driven to rotate by the lower conveyance belt 201. A conveyance support plate 204 is fixed inside the lower conveyance belt 201 and in the vicinity of the booklet conveyance path.

  The upper transport belt 206 is rotatable by winding rollers 207 and 208 and is supported by a support member 209. The support member 209 is urged by a spring and presses the upper transport belt 206 against the transport support plate 204 via the lower transport belt 201. The booklet SA subjected to the cutting process passes through the gap between the lower conveying belt 201 and the upper roller 205 of the second conveying means 200, and is further conveyed while being pressed and sandwiched between the lower conveying belt 201 and the upper conveying belt 206.

  The booklet SA conveyed in the horizontal direction by the lower conveying belt 201 is guided by a rotating large-diameter roller 211 and a guide plate fixedly arranged, and is lifted and conveyed by being deflected by about 90 ° vertically. The booklet SA is further sandwiched between the large-diameter roller 211 and the pinch roller 213, and is discharged through the booklet discharge port 214. The booklet storage means with the fold portion a of the booklet SA up and the small mouth b down. It is placed on the 400 booklet stacking table 401.

  The booklet storage unit 400 includes a booklet stacking table 401, a movable wall member (pusher) 410, a partition member (holder) 420, a pressing wall member 430, and a driving unit.

  The booklet stacking table 401 sequentially receives a plurality of booklets SA that have been subjected to the cutting process from the booklet discharge port 214 and stacks the sheet surfaces with the fold portion a of the booklet SA facing up. The movable wall member 410 stands upright on the booklet stacking table 401 and is supported so as to be horizontally movable. The movable wall member 410 presses the sheet surface of the booklet SA loaded on the booklet stacking table 401, and the booklet loading table 401 and the booklet discharge port 214. Reciprocates horizontally between the two.

  The movable wall member 410 receives the booklet SA loaded on the booklet stacking table 401 at a stop position that is usually advanced from the booklet discharge port 214, and each time the cut-off booklet SA is carried into the booklet loading table 401, The booklet discharge port 214 is retracted to a position where the booklet discharge port 214 is opened. After the booklet SA has passed through the booklet discharge port 214, the booklet SA returns to the stop position and waits while pressing the sheet surface of the booklet SA.

  The partition member 420 is movable in a vertical direction orthogonal to the booklet stacking table 401. When the movable wall member 410 starts to retract so that the booklet discharge port 214 is opened for receiving the next booklet, the partition member 420 In response to the movement of the movable wall member 410 to the stop position while pressing the sheet surface of the next booklet SA in response to the sheet surface of the booklet SA loaded in place of the movable wall member 410, the booklet SA is moved to the booklet. It starts to descend along the rear end portion of the loading table 401 and is retracted so that the next booklet SA can be received on the booklet loading table 401. As the movable wall member 410 completes moving to the stop position, the partition member 420 starts to rise.

  The pressing wall member 430 is supported so as to be able to move upright on the booklet stacking table 401 and is biased by a spring. The booklet contact surface of the pressing wall member 430 faces the movable wall member 410 or the partition member 420 and presses and holds the sheet surface of the booklet SA loaded on the booklet stacking table 401.

  FIG. 6 is a block diagram showing the driving means of the booklet transport system.

  The booklet transport motor M <b> 1 drives the first transport unit 100 and the second transport unit 200. A gear g1 provided on the drive shaft of the booklet transport motor M1 rotates the drive roller 121 of the first transport means 100 via gears g2, g3, g4, and g5. The driving roller 121 rotates the driving roller 112 via the belt TB1 and rotates the lower conveyance belt 111.

  A belt TB2 that winds a pulley TP1 coaxial with the gear g4 is rotatable by winding pulleys TP2, TP3, and TP4. An upper roller 205 is fixed on the rotation shaft of the pulley TP2 and is rotatable. The gear g6 fixed on the rotation shaft of the pulley TP4 rotates the gear g7 fixed on the rotation shaft of the driving roller 202. The driving roller 202 rotates the lower conveyance belt 201.

  A belt TB3 that winds a pulley TP5 fixed on the rotation shaft of the drive roller 202 and a pulley TP6 on the intermediate shaft is connected to a gear g9 via gears g8 and g9 fixed on the rotation shaft of the pulley TP6. The large-diameter roller 211 fixed on the rotation shaft is rotated.

  FIG. 7 is a cross-sectional view showing the lower conveying belt 201 of the second conveying means 200 and the driving means for the movable stopper 221.

  The movable stopper moving motor M2 moves the movable stopper 221 to a predetermined position corresponding to the paper size via the gears g11 and g12 and the belt TB4. The stopper releasing motor M3 drives and rotates the cam 222 via the gears g13 and g14, and raises and lowers the movable stopper 221. The movable stopper 221 is held in an initial standing state when the front end of the booklet SA is abutted, and is brought down by driving the motor M3 when the booklet SA is discharged.

  Since the protruding amount of the fore edge before the booklet cutting differs depending on the thickness of the booklet SA, that is, the thickness of one sheet and the number of sheet bundles, the setting position of the movable stopper 221 can be set by these numerical values or the booklet Based on the thickness detection, the control means selects an optimum value.

  FIG. 8 is a front view of the driving unit of the pressing unit including the upper conveying belt 206.

  The pressing motor M4 rotates the rotating disk 231 via gears g21, g22, g23, g24, g25, and g26. The eccentric pin 232 implanted in the rotating disk 231 is connected to the lower end portion of the crank 233 and swings the crank 233. The upper end portion of the crank 233 is connected to the connecting plate 234 and moves the connecting plate 234 up and down. The connecting plate 234 is urged downward in the figure by two springs 235.

  The two connecting rods 236 fixed to both sides of the connecting plate 234 are fitted to a bearing 238 fixed to the fixed frame 237 and supported so as to be movable up and down. The upper end portion of the connecting rod 236 is fixed to the pressing member 240.

  The pressing member 240 is spring-biased with respect to the supporting member 209 that supports the upper conveying belt 206, and is supported so as to be able to move up and down. When the small edge of the booklet SA placed on the surface of the lower conveying belt 201 is cut, the pressing member 240 is moved up and down through the crank 233, the connecting plate 234, and the connecting rod 236 by the driving rotation of the rotating disk 231. Further, the pressing member 240 moves according to the thickness of the booklet SA and presses the upper surface of the booklet SA.

  FIG. 9 is a cross-sectional view of the cutting means 300.

  The cutting unit 300 includes a cutting upper blade 301, a cutting lower blade 302, and a driving unit that drives the cutting upper blade 301 to be movable up and down.

  The cutting motor M5 rotates the gears g31, g32, and g33, and eccentrically rotates the eccentric pin 303 installed at the eccentric position of the gear g33. The tip of the eccentric pin 303 slides on the inner peripheral surface of the movable member 304 and moves the movable member 304 up and down.

  An upper blade support frame 306 is fixed to an upper portion of a lifting shaft 305 that is integrated with the movable member 304 and is supported so as to be liftable. A cutting upper blade 301 is fixed to the upper blade support frame 306.

  The small edge of the booklet SA is cut by the cutting edge of the lower cutting blade 301 and the cutting edge of the lower cutting blade 302 at the fixed position. Reference numeral 320 denotes a waste box for storing waste cut from a small edge.

  A pressing plate 309 is supported by the upper blade support frame 306 by being biased by a spring 308. A pressing roller 311 that presses the movable plate 310 is supported at the lower portion of the upper blade support frame 306.

  In the lowering process of the upper blade support frame 306, the pressing plate 309 is lowered to press the upper surface of the booklet SA placed on the cutting lower blade 302, and then the pressing roller 311 that is lowered moves the movable plate 310. The cutting edge of the cutting upper blade 301 cuts the fore edge b.

  FIG. 10 is a cross-sectional view showing a movable wall member (hereinafter referred to as a pusher) 410 and a partition member (hereinafter referred to as a holder) 420 in the vicinity of the booklet discharge port 214.

  The pusher 410 has an upright vertical wall portion 411 that presses the stacked booklet SA, and can move horizontally in the direction of the booklet stacking table 401. The pusher moving motor M6 rotates the rotating disk 412 via gears g41, g42, g43, g44, and g45. An eccentric pin 413 implanted at an eccentric position of the rotating disk 412 is connected to the right end portion of the crank 414 to swing the crank 414. The illustrated left end of the crank 414 is connected to the pusher 410 and moves the pusher 410 in the horizontal direction. A pusher 410 indicated by a solid line in the drawing indicates a retracted position, and the booklet discharge port 214 is opened to allow the booklet SA to pass therethrough. The position indicated by the alternate long and short dash line is a stop position where the pusher 410 is moved in the horizontal direction by the driving means.

  A movable holding member 421 arranged at both end portions of the holder 420 arranged in parallel in the vicinity of the pusher 410 holds the two sets of rollers 422 and 423 in a rotatable manner. The two sets of rollers 422 and 423 roll on the guide rails 424 arranged at both end portions of the apparatus main body, thereby allowing the movable holding member 421 to move up and down.

  That is, the movable holding member 421 is driven up and down along the guide rail 424 by a holder lifting motor M7 and a driving unit provided at the lower portion of the guide rail 424. The illustrated holder 420 is lifted from the lower retracted position and shows a state in which the booklet SA can be held.

  FIG. 11 is a perspective view of the booklet storage means 400 including the pusher 410, the holder 420, and the pressing wall member 430. FIG. 12 is a cross-sectional view showing the booklet storing means 400 in a state where a plurality of booklets SA are stacked on the booklet stacking table 401.

  The pusher 410 is moved in the horizontal direction indicated by the arrow by driving the pusher moving motor M6. The holder 420 is moved in the vertical direction indicated by the arrow by driving the holder elevating motor M7. The pressing wall member 430 is biased by the constant load spring member 431 and is moved in the horizontal direction indicated by the arrow.

  After the booklet SA is sent out from the booklet discharge port 214 and the lower end of the booklet SA passes through the holding position of the large-diameter roller 211 and the pinch roller 213, the pusher 410 starts to advance by driving the pusher moving motor M6. The pusher 410 advances to press the booklet SA, and pushes it in the direction of the holder 420. Almost simultaneously with the start of the forward movement of the pusher 410, the holder 420 starts to descend by starting to drive the holder lifting motor M7. The lower portion of the booklet SA is closely held in a standing posture by a pusher 410 and a spring-biased pressing wall member 430. The upper portion of the booklet SA that has a fold portion and has a swollen shape is stacked so as to be folded over a space portion that extends above the inclined surface portion 432 of the pressing wall member 430. After completing the booklet loading or during the booklet loading operation, the upper part of the booklet SA can be grasped and easily taken out.

  FIG. 13 is a schematic diagram showing the arrangement of sensors and motors of the sheet cutting apparatus C. PS1 is an entrance sensor disposed at the entrance of the first transport unit 100, PS2 is a transport unit sensor disposed at the second transport unit 200, and PS3 is a paper discharge unit disposed at the exit of the second transport unit 200. It is a sensor.

  FIG. 14 is a plan view showing a basic screen of the operation panel of the image forming apparatus main body A. FIG. When the paper size, the set number of sheets, and the like are set on the operation panel and the output mode is set, the paper post-processing mode shown in FIG. 15 is entered.

  FIG. 15 is a plan view showing the screen of the operation panel set in the paper post-processing mode. When saddle stitching, half-folding, and cutting are selected on this screen and set with the OK key, the finisher adjustment menu screen shown in FIG. 16 is displayed. FIG. 16 is a plan view of the operation panel showing the finisher adjustment menu screen.

  When the trimming stopper position adjustment is set among the saddle stitching stopper position adjustment, the middle folding stopper position adjustment, and the trimming stopper position adjustment, the trimming stopper position adjustment screen shown in FIG. 17 is displayed. FIG. 17 is a plan view of the operation panel showing the cutting stopper position adjustment screen. On this screen, the position adjustment allowance is entered using the numeric keys and determined using the setting keys. The input position adjustment fee is displayed at the top of the screen.

  FIG. 18 is a block diagram showing the control of the sheet cutting apparatus C, and FIG. 19 is a time chart when the cutting process is performed. Hereinafter, the operation of each driving means by the control means 90 will be described.

  In FIG. 19, when the entrance sensor PS1 detects the passage of the front end of the booklet SA conveyed from the paper post-processing apparatus B, the driving of the movable stopper moving motor M2 is started after a lapse of a predetermined time, corresponding to the paper size. The movable stopper 221 is moved to the position and stopped. When the transport unit sensor PS2 detects passage of the front end of the booklet SA, the driving of the booklet transport motor M1 is stopped. The driving of the pressing motor M4 is started in conjunction with the stopping of the driving of the booklet conveying motor M1. When it is detected that the pressing member 240 has reached the bottom dead center by the pressing motor M4, the driving of the pressing motor M4 is stopped and the driving of the cutting motor M5 is started. The movable stopper moving motor M2 is held in an excited state after the drive is stopped, and the excitation is released after the cutting motor M5 starts to be driven.

  When it is detected that the cutting upper blade 301 has stopped near the top dead center by stopping the driving of the cutting motor M5, driving of the pressing motor M4, the movable stopper releasing motor M3, and the pusher moving motor M6 is started. Is done.

  When it is detected that the pressing member 240 has reached the top dead center by the pressing motor M4, the driving of the pressing motor M4 is stopped, the driving of the booklet transport motor M1 is started, and the booklet SA is transported to the paper discharge unit.

  When the paper discharge unit sensor PS3 detects the passage of the rear end of the booklet SA, the driving of the booklet transport motor M1 is stopped, and the driving of the movable stopper release motor M3 and the holder lifting / lowering motor M7 is started. Thereafter, the booklet SA is accommodated in the booklet accommodating means 400 by the cooperative operation of the pusher moving motor M6 and the holder lifting / lowering motor M7.

  (1) As shown in FIG. 19, when the control means 90 is driving the motor M5 which is a drive source of the cutting means 300, the drive means of each means other than the cutting means 300, ie, a booklet conveyance motor. The driving of the motor M1, the movable stopper moving motor M2, the movable stopper releasing motor M3, the pressing motor M4, the pusher moving motor M6, and the holder lifting motor M7 is controlled to be inactive.

  (2) The control unit 90 drives the movable stopper moving motor M2 by setting the number of sheets of the booklet SA conveyed by the first conveyance unit 100 and the second conveyance unit 200 (see FIG. 14), and thereby the movable stopper The stop position of the booklet SA 221 is variably controlled.

  (3) When the number of sheets of the booklet SA is set to a predetermined number or less (for example, 1 to 3), the control unit 90 does not automatically perform the cutting process, but displays a message area on the basic screen of the operation panel (see FIG. 14) indicates that the cutting process is not performed.

  (4) When selecting the execution of the cutting process, the control unit 90 transports the booklet SA after the cutting process by the cutting unit to the booklet storing unit 400 by the first transport unit 100 and the second transport unit 200. When the cutting process non-execution is selected, the cutting process by the cutting unit 300 is not performed, and the booklet SA is controlled to be directly conveyed to the booklet storing unit 400 by the first conveying unit 100 and the second conveying unit 200. FIG. 20 is a time chart showing the control of the sheet cutting apparatus when the cutting process non-execution is selected. When this mode is set, the movable stopper moving motor M2, the pressing motor M4, and the cutting motor M5 are held in an inoperative state, and the introduced booklet SA is cut by the driving of the booklet transport motor M1. After passing through 300, it is quickly conveyed to the booklet storage means 400.

  (5) When the cancel operation is performed during the image forming process (using the cancel button shown in FIG. 15), the control unit 90 does not perform the cutting process by the cutting unit 300, and transfers the booklet SA to the first transport unit 100 and Control is performed so that the second transport unit 200 transports the booklet to the booklet storage unit 400. As a result, the non-cutting booklet SA passes through the cutting means 300 without stopping, and is quickly discharged to the booklet storage means 400.

  (6) The control means 90 excites the movable stopper moving motor M2 immediately before the leading end of the booklet SA conveyed by the first conveying means 100 and the second conveying means 200 hits the movable stopper 221. The movable stopper 221 is held in a fixed state. Accordingly, the movable stopper 221 is prevented from moving due to an impact when the leading end of the booklet SA to be conveyed hits the movable stopper 221.

  (7) FIG. 21 is a time chart of the sheet cutting apparatus C that controls the conveyance of the first booklet SA of the first copy and the second booklet SA of the second copy.

  The control unit 90 transports the booklet SA cut by the cutting unit 300 by the second transport unit 200 and transports the subsequent booklet SA to the booklet storage unit 400 by the first transport unit 100. Control is performed so that the carrying process of the booklet SA after the cutting process and the carrying-in process of the subsequent booklet SA are performed simultaneously.

  That is, when the home position sensor (not shown) detects that the pressing member 240 is released from the pressing motor M4 and returned to the initial position, the control unit 90 starts driving the booklet transport motor M1, 2 The lower conveying belt 201 of the conveying means 200 is rotated, and the preceding booklet SA is discharged and stored in the booklet storing means 400. The lower conveying belt 111 of the first conveying means 100 is simultaneously rotated by the booklet conveying motor M1, and the subsequent booklet SA introduced into the sheet cutting device C follows the previous booklet SA while maintaining a predetermined interval. Then, it is sent to the cutting means 300, transported by the second transport means 200, and stopped at the stop position of the movable stopper 221. Thereafter, the subsequent booklet SA is subjected to cutting processing, paper discharge processing, and storage processing.

  By bringing the rear end portion of the preceding booklet SA and the front end portion of the subsequent booklet SA close to each other and transporting them, the productivity of post-processing of the booklet SA is improved.

  (8) The control means 90 performs control so that the stop position of the movable stopper 221 is set to be adjustable in accordance with the arbitrarily set cutting amount. In the finisher adjustment menu screen of FIG. 16, the cutting stopper position adjustment is set, and the cutting stopper position adjustment screen shown in FIG. 17 is displayed. If an arbitrary position adjustment allowance is input using a numeric key and set, the input position adjustment allowance is displayed at the top of the screen. The arbitrary setting function of the cutting allowance allows the user to arbitrarily adjust the amount to be cut.

1 is an overall configuration diagram of an image forming system including an image forming apparatus main body, a sheet post-processing apparatus, and a sheet cutting apparatus. FIG. 3 is a schematic diagram illustrating a sheet conveyance path of a sheet post-processing apparatus. The top view of the sheet | seat which carried out the saddle stitch process, the perspective view of the booklet which performed the post-process of saddle stitching and bi-folding, the perspective view which shows the state which double-opened the booklet, and sectional drawing of a booklet. 1 is an overall configuration diagram of a sheet cutting apparatus according to the present invention. Sectional drawing which shows the paper conveyance path | route of a paper cutting device. The block diagram which shows the drive means of a booklet conveyance system. Sectional drawing which shows the lower conveyance belt of a 2nd conveyance means, and the drive means of a movable stopper. The front view of the drive means of the press unit containing an upper conveyance belt. Sectional drawing of a cutting means. Sectional drawing which shows the movable wall member and partition member of booklet discharge port vicinity. The perspective view of a movable wall member, a partition member, and a press wall member. Sectional drawing which shows the booklet storage means of the state which loaded the booklet of the some part on the booklet loading stand. The schematic diagram which shows arrangement | positioning of the sensor and motor of a paper cutting device. FIG. 3 is a plan view showing a basic screen of an operation panel of the image forming apparatus main body. The top view which shows the screen of the operation panel set to paper post-processing mode. The top view of the operation panel which shows a finisher adjustment menu screen. The top view of the operation panel which shows a cutting stopper position adjustment screen. The block diagram which shows control of a paper cutting device. 6 is a time chart showing control of the sheet cutting apparatus when a cutting process is performed. 6 is a time chart showing control of the sheet cutting device when cutting processing non-execution is selected. 6 is a time chart of a sheet cutting apparatus that controls conveyance of a first booklet of a preceding copy and a second booklet of a subsequent copy.

Explanation of symbols

50 binding means 60 folding means 90 control means 100 first conveying means 111 lower conveying belt 114 upper conveying belt 200 second conveying means 201 lower conveying belt 206 upper conveying belt 221 movable stopper (stopping means)
240 Pressing member (pressing means)
DESCRIPTION OF SYMBOLS 300 Cutting means 301 Cutting upper blade 302 Cutting lower blade 309 Press plate 400 Booklet storage means 401 Booklet loading table 410 Movable wall member (pusher)
420 Partition member (holder)
430 Pressure wall member A Image forming apparatus main body B Paper post-processing apparatus C Paper cutting apparatus M1, M2, M3, M4, M5, M6, M7 Motor PS1 Entrance sensor PS2 Transport sensor PS3 Paper discharge sensor S Paper SA Booklet a Crease part b

Claims (10)

In a paper cutting device that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing and half-folding by a cutting means,
A driving source for driving a conveying means for conveying the booklet; a driving source for driving a movable stopping means for stopping the booklet at a predetermined position; a driving source for driving a pressing means for pressing the booklet; A driving source that drives a cutting unit that cuts the edge, a driving source that drives a booklet storage unit that stores a booklet that has been cut, and a control unit that controls each of the driving sources.
The sheet cutting apparatus according to claim 1, wherein when the drive source of the cutting means is driven, the control means controls the drive sources of means other than the cutting means to be inactive. In a paper cutting device that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing and half-folding by a cutting means,
Conveying means for conveying the booklet formed by the saddle stitching process and the half-folding process, a stopping means for stopping the booklet at a predetermined position, a cutting means for cutting the edge of the booklet, and a control for controlling the respective means Means comprising:
The paper cutting apparatus, wherein the control means variably controls the booklet stop position of the stop means according to the number of paper sheets of the booklet conveyed to the cutting means by the conveying means. In a paper cutting device that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing and half-folding by a cutting means,
Conveying means for conveying the booklet formed by the saddle stitching process and the half-folding process, a stopping means for stopping the booklet at a predetermined position, a cutting means for cutting the edge of the booklet, and a control for controlling the respective means Means comprising:
The sheet cutting apparatus, wherein the control means does not automatically perform a cutting process when the number of sheets of the booklet is set to a predetermined number or less. When the number of sheets of the booklet is set to a predetermined number or less, the control means does not automatically perform the cutting process and displays on the operation unit screen that the cutting process has not been performed. The sheet cutting device according to claim 3. In a paper cutting device that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing and half-folding by a cutting means,
Accommodates a booklet that is formed by saddle stitching and folding, a stop unit that stops the booklet at a predetermined position, a cutting unit that cuts the edge of the booklet, and a booklet that has been cut. Comprising a booklet storage means, and a control means for controlling each means,
The control means transports the booklet after the cutting process by the cutting means to the booklet storage means when the cutting means is selected, and the cutting process by the cutting means selects the non-cutting process. The sheet cutting apparatus is characterized in that the booklet is controlled to be transported to the booklet storage means by the transport means without performing the above. In a paper cutting device that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing and half-folding by a cutting means,
Accommodates a booklet that is formed by saddle stitching and folding, a stop unit that stops the booklet at a predetermined position, a cutting unit that cuts the edge of the booklet, and a booklet that has been cut. Comprising a booklet storage means, and a control means for controlling each means,
The control unit controls the booklet to be transported to the booklet storage unit by the transport unit without performing the trimming process by the trimming unit when a cancel operation is performed during the image forming process. Paper cutting device. In a paper cutting device that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing and half-folding by a cutting means,
Accommodates a booklet that is formed by saddle stitching and folding, a stop unit that stops the booklet at a predetermined position, a cutting unit that cuts the edge of the booklet, and a booklet that has been cut. Comprising a booklet storage means, and a control means for controlling each means,
The control means excites the driving source that drives the stop means immediately before the leading end of the booklet conveyed by the conveyance means hits the stop member of the stop means, thereby bringing the stop means into a fixed state. A sheet cutting apparatus characterized by holding. In a paper cutting device that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing and half-folding by a cutting means,
Accommodates a booklet that is formed by saddle stitching and folding, a stop unit that stops the booklet at a predetermined position, a cutting unit that cuts the edge of the booklet, and a booklet that has been cut. Comprising a booklet storage means, and a control means for controlling each means,
The control means causes the subsequent booklet to be carried into the cutting means while the booklet cut by the cutting means is conveyed and conveyed to the booklet storing means, and the booklet conveying process after the cutting process is carried out. A paper cutting device that simultaneously carries in a subsequent booklet carrying-in process. In a paper cutting device that finishes a booklet by cutting the edge of a booklet that has been subjected to saddle stitching processing and half-folding by a cutting means,
Accommodates a booklet that is formed by saddle stitching and folding, a stop unit that stops the booklet at a predetermined position, a cutting unit that cuts the edge of the booklet, and a booklet that has been cut. Comprising a booklet storage means, and a control means for controlling each means,
The sheet cutting apparatus, wherein the control unit sets the stop position of the stop member of the stop unit so as to be adjustable in accordance with an arbitrarily set cutting amount. Image forming means for forming an image on the paper fed by the paper feeding means according to the image information;
A sheet post-processing apparatus including a binding unit that performs saddle stitching on the sheet on which the image has been formed by the image forming unit, and a folding unit that performs folding processing on the sheet subjected to the saddle stitching process;
The sheet cutting device according to any one of claims 1 to 9,
An image forming apparatus characterized in that an image-formed sheet is folded in half and saddle-stitched to produce a booklet, and the booklet is finished by cutting a small edge of the booklet by a cutting means.

Images