JP2010247237A - Paper sheet cutting device, and finisher device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper sheet cutting device which, when cutting a sheet of paper, guide a scrap of cut sheet to a storage box from an initial stage of cutting. <P>SOLUTION: A guide plate for guiding the sheet of paper to a cutting position on a paper placement table is disposed in a freely swingable manner above the scrap storage box, and is configured to be swingable with a press plate disposed vertically movable in a cutting direction perpendicular to the paper placement table and a movable cutting blade assuming the form of a flat plate in such a manner that, after the press plate press-holds the sheet of paper, a guide surface retreats the guide plate from a position for guiding the sheet of paper onto the paper placement table to the side of the scrap storage box in an interlocking relation with the movable cutting blade descending in the cutting direction. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cutting device that cuts paper sheets held on a paper platform, for example, aligns sheets formed with an image by an image forming apparatus in a bundle shape, and sets them in a predetermined cutting line. The present invention relates to an improvement of a cutting apparatus that performs cutting with a printer.

  In general, this type of cutting apparatus is widely used as an apparatus for setting paper sheets on a paper table and cutting a predetermined portion thereof. For example, a sheet fed from a printer device or the like is aligned in a bundle and bound in a bookbinding manner, and a trimming device that trims and aligns the peripheral edges of the bound sheets or a sheet from an image forming device is halved. It is known as a cutting device that cuts in half.

  Conventionally, as such a cutting apparatus, for example, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 10-138194), a cutting apparatus that sets a single sheet on a table and cuts it, and Patent Document 2 (Japanese Patent Laid-Open No. 2003-71780) discloses a cutting apparatus that sets a large number of sheets in a bundle and cuts them at once. And as a cutting method, when cutting with a cutting blade (rotary blade) that moves from one end of the sheet to the other end as in Patent Document 1, and flat plate cutting from above the bundle-shaped sheet as in Patent Document 2 What cuts when a blade (guillotine blade) descends is known.

  Therefore, as in the above-mentioned Patent Document 1, in a mechanism that cuts a sheet by moving one cutting blade (rotating blade) from one end to the other end of the sheet, the cutting blade can be cut when a plurality of sheet bundles are cut at once. There is a known problem of meandering when the cutting blade is run with a force that surpasses the shearing force. For this reason, conventionally, such a rotary blade cutting mechanism is employed when cutting one or a small number of sheets. Accordingly, it is impossible to cut a large number of sheet bundles with such an apparatus.

  In addition, when a large number of sheet bundles are cut at once with a flat cutting blade (guillotine blade) that moves up and down in the thickness direction as in Patent Document 2, it is necessary to increase the shear energy required for cutting. is there. This is because the sheet bundle is cut with its striking force by lowering the cutting blade vigorously at a high speed. In this case, the apparatus must be constructed robustly and the drive device must be large.

  Similarly, in Patent Document 3 (Japanese Utility Model Publication No. 47-8308) and Patent Document 4 (Japanese Utility Model Publication No. 52-1034889), a device for miniaturizing a drive mechanism for moving a plate-shaped cutting blade up and down is described. Has been proposed. In this document, it is proposed that the cutting blade is oscillated while the plate-like cutting blade is supported by a pair of left and right oscillating arms. Thus, by swinging the cutting blade that moves up and down with a pair of arm members and performing cutting, the impact on the apparatus when the cutting blade reaches the bottom dead center (cutting end posture) can be reduced. Therefore, it is not necessary to make the device robust, and the size and weight can be reduced. Further, Patent Document 4 proposes that the cutting force is reduced by varying the lengths of the pair of left and right swing arms so that the cutting blade is inclined and cut with respect to the sheet surface.

  However, when cutting a paper sheet with such a guillotine blade, a fixed cutting blade is provided on the side of the paper table so as to face the movable cutting blade that moves up and down, and the paper sheet is formed into a bowl shape with this fixed cutting blade. It is necessary to cut by pinching. In this case, when the paper sheet is fed and set to a predetermined position on the paper platform, the leading edge of the paper sheet may hit the fixed blade and bend or skew (skew). Is provided. For example, in Patent Document 5 (Japanese Patent No. 3849334), a swingable guide blade is provided on the front side of the fixed blade in the sheet feeding direction, and the guide plate is lowered (pressed) to press and support the sheet on the paper platform. A mechanism is disclosed in which a piece of scrap paper that is cut by swinging in a direction of retreating from a fixed blade by a (direction) operation is dropped downward.

Japanese Patent Laid-Open No. 10-138194 JP 2003-71780 A Japanese Utility Model Publication No. 47-8308 Japanese Utility Model Publication No. 52-1034889 Japanese Patent No. 3849334 (FIG. 4)

  As described above, when a plurality of paper sheets are stacked and held on a paper table and cut, it is known to cut with a guillotine blade disclosed in Patent Documents 2 to 5. However, when cutting with such a guillotine blade, when the paper sheet is fed and set to the cutting position, the leading edge of the paper sheet abuts against the fixed blade and the leading edge is frequently broken. Therefore, in the above-mentioned Patent Document 5, a guide plate that swings up and down is provided on the front side of the fixed blade, and this plate is configured to be pushed downward by a lowering operation of the guillotine blade. And the waste box is arrange | positioned under this fixed blade.

  However, in the conventional guide plate, the guide plate is pivotally supported by a conveying means (conveyer means in Reference 5) that conveys a paper sheet to a paper table having a fixed cutting blade. The guide plate is configured to swing in conjunction with a pressing member (press member) fitted to a pair of left and right rod members provided on the apparatus frame.

  Such a conventional structure has the following problems. First, since the guide plate is interlocked with the press member that presses the paper sheet onto the paper mount, the guide plate must be retracted downward from the guide position before the press member paper sheet is pressed. For this reason, in the same document, a pressing member that presses the central portion of the paper sheet is provided separately from pressing the small edge (cut edge) of the paper sheet, and the paper sheet is pressed and held by the central pressing member. A double press mechanism that operates the cutting edge press member to press and hold the cutting edge is employed. This is because, for example, when the paper sheet is a few sheets, the operation of pressing the paper sheet with the cutting edge press member, swinging and retracting the guide plate, and then cutting with the cutting blade is not possible due to the stroke. It is close to possible.

  Further, in the conventional structure, the guide plate is swingably supported on the paper sheet conveying means (belt conveyor mechanism), so that there is a dimensional error between each mechanism, especially between the conveyor mechanism and the cutting mechanism. However, the swing timing of the guide plate is different, and when the paper sheet is cut with the cutting blade, the guide plate does not retract downward, and the cut paper piece cannot be dropped. This phenomenon is that when the cutting edge of the cutting blade is inclined with respect to the cutting line direction and the paper sheet is gradually cut from one end to the other end, the guide plate is retracted below the fixed blade at the start of cutting. Despite being preferable, the timing difference of the guide plate causes the quality of the cut surface to be inferior.

  Therefore, the present inventor employs a mechanism for gradually cutting the paper sheet from one end to the other end by inclining the cutting edge of the cutting blade, and after the pressing operation of the cutting edge press member, the guide plate is interlocked with the movable cutting blade. Led to the idea of evacuating down. As a result, the guide plate is retracted in conjunction with the movable cutting blade after the paper sheet is securely pressed and held, and the paper sheet is not disturbed at the same time. Will work.

  In the present invention, when a paper sheet is transported and set to a predetermined cutting position, the posture is not disturbed, and when the paper sheet is cut, the cut paper piece can be guided to the storage box from the beginning of cutting. The main issue is to provide a paper sheet cutting device that can be used.

  In order to achieve the above object, according to the present invention, a guide plate for guiding paper sheets to a cutting position of a paper mount is disposed so as to be swingable above the waste storage box, and is moved up and down in a cutting direction orthogonal to the paper mount. The guide plate is placed on the paper platform in conjunction with the movable cutting blade that moves down in the cutting direction after the press plate presses and holds the paper sheets. It is configured to be swingable so as to be retracted from the position for guiding leaves to the waste storage box side.

  More specifically, a paper table 15 for supporting paper sheets, a base plate 10 disposed in a direction substantially perpendicular to the paper table, and supported so as to be movable along the base plate. A press plate 21 that presses and holds the sheet surface, a flat plate-shaped movable cutting blade 25 that is movably supported along the base plate and cuts the sheets on the paper table, and is in sliding contact with the movable cutting blade. A fixed cutting blade disposed on the paper mount side, a drive motor M that moves the movable cutting blade and the press plate up and down in the cutting direction, and a cut paper piece disposed adjacent to the fixed cutting blade are accommodated. A cutting waste storage box 41 and a guide plate 35 that is disposed above the cutting waste storage box and guides paper sheets to the paper mount.

  The guide plate is configured to be swingable so that a guide surface for guiding the paper sheet to the paper mount is retracted to the waste storage box side. The guide plate is configured so that the press plate receives the paper sheet. The guide surface is configured to retreat to the waste storage box side from the position where the guide surface guides the paper sheet to the paper table in conjunction with the movable cutting blade that is lowered in the cutting direction after being pressed and held.

  The present invention is a press plate in which a guide plate that guides paper sheets to a cutting position of a paper mount is disposed so as to be swingable above a waste storage box and is movable up and down in a cutting direction orthogonal to the paper mount. And a flat plate-shaped movable cutting blade, where the guide surface is linked to the movable cutting blade that descends in the cutting direction after the press plate presses and holds the paper sheet, and the guide surface guides the paper sheet to the paper table. Since it is configured to retreat from the waste storage box side, the following effects are obtained.

  When the paper sheet is transported and set to the cutting position, the paper sheet is guided to a predetermined cutting position along the guide plate. Therefore, the paper sheet is caught on the edge of the fixed cutting blade and the leading edge is bent or skewed. There is nothing to do. In addition, the guide plate is configured so that the guide surface for guiding the paper sheet is retracted to the waste storage box side in conjunction with the movable cutting blade that descends in the cutting direction after the paper sheet at the cutting position is pressed and held by the press plate. Since it is configured, when cutting paper sheets with a movable cutting blade, it can be surely retracted to the waste storage box side, cutting pieces in the middle of cutting will be guided to the waste storage box side, The cut piece of paper does not enter the cutting part (cutting part) and prevent normal cutting.

  That is, when the paper sheet is gradually cut from one end to the other end, the cut paper piece hangs down to the waste storage box side by its own weight, and this paper piece does not get mixed into the cutting portion and prevent normal cutting. Excellent effects such as.

The perspective view which shows the whole structure of the paper sheet cutting apparatus concerning this invention. Explanatory drawing which shows the front structure of the apparatus of FIG. Explanatory drawing which shows the structure of the press means in the apparatus of FIG. It is explanatory drawing of the cutting state of the paper sheets in the apparatus of FIG. 1, (a) shows the state in which a cutting blade is a standby position, (b) shows the state in which a guide member exists in a guide position. It is explanatory drawing of the cutting state of the paper sheets in the apparatus of FIG. 1, (a) shows the state which the press member pressed the paper sheet on a paper mounting base, (b) set a paper sheet bundle in a cutting position. Indicates the state that has been performed. It is explanatory drawing of the cutting state of the paper sheets in the apparatus of FIG. 1, (a) shows the state in the middle of cutting a paper sheet with a cutting blade, (b) shows the state which has a guide member in a retracted position. FIGS. 2A and 2B are explanatory diagrams of a cutting state of a paper sheet in the apparatus of FIG. 1, in which FIG. 1A shows a state where cutting of the paper sheet is finished with a cutting blade, and FIG. FIG. 2 is a longitudinal sectional view of the apparatus of FIG. 1. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration explanatory diagram of a finisher device incorporating a paper sheet cutting device according to the present invention.

  The present invention will be described in detail below based on the preferred embodiments shown in the drawings. FIG. 1 is a perspective view showing the overall configuration of a paper sheet cutting apparatus (trimmer unit) according to the present invention, and FIG. 2 is a front view thereof. FIG. 3 is an explanatory view of the structure of the pressing means, and FIGS. 4 to 7 are explanatory views of the cutting operation of the plate-like cutting blade in the apparatus of FIG.

  A paper sheet cutting device (trimmer unit) A shown in FIG. 1 includes a paper table 15 for loading and supporting the paper sheet P, a pressing means 20 for pressing and holding the paper sheet P on the paper table, and a paper sheet. The movable cutting blade 25 cuts the leaves P along a predetermined CL, and a fixed cutting blade 28 provided integrally with the paper mount 15. These paper table 15, pressing means 20, and movable cutting blade 25 are attached to an apparatus frame (base plate described later) 10. Each configuration will be described below.

[Device frame]
The apparatus frame 10 is mounted with a paper table 15, a movable cutting blade 25, and a pressing means 20, and is made of, for example, a steel plate having an appropriate thickness for mechanical strength according to the cutting of the paper sheet P. The apparatus frame 10 shown in FIG. 1 is composed of a flat base plate arranged in a direction orthogonal to the paper surface of the paper sheet P (the Z direction shown in FIG. 1; the vertical direction). The flat base plate (apparatus frame) 10 is provided with a cutting opening 12 for feeding and discharging the paper sheet P, and a direction in which a paper mount 15 (to be described later) is orthogonal to the cutting opening 12 (the Y direction shown in the figure) ). The base plate 10 has a pair of left and right drive rotation members 13d and 13f (hereinafter, collectively referred to as reference numeral 13) that support the movable cutting blade 25 on the front side, and a pair of drive rotation members on the back side. A transmission chain 29 for synchronously rotating the member 13 is arranged.

[Configuration of the paper platform]
A paper platform 15 having a fixed cutting blade 28 is attached to the cutting opening 12 of the base plate 10 described above. The paper platform 15 is configured by a placement member such as a tray that holds a paper sheet (or paper sheets) to be cut in a predetermined posture. The shape may be a shape that supports the entire paper sheet P, or a shape that partially supports the cutting edge of the paper sheet P as shown in the figure. As shown in FIG. 3, the illustrated paper platform 15 is composed of a beam-shaped member having a predetermined length along a cutting line CL. The beam-shaped member has a fixed cutting blade 28 at a cutting edge along the cutting line CL. It is attached integrally. That is, as shown in FIG. 8, the paper platform 15 is provided with a step portion 15w along the cutting edge CL, and a plate-like fixed cutting blade 28 is embedded in the step portion 15w. The fixed cutting blade 28 is made of a tough material such as carbon steel, cemented carbide or stainless steel.

  A pair of left and right guide members 17R and 17L (see FIG. 3) are integrally attached to the paper mount 15 with a bolt or the like along a cutting line CL. A guide groove 17g is formed in the pair of left and right guide members 17R and 17L, and is configured to guide a press plate 21, which will be described later, up and down freely.

[Fixing cutting blade positioning mechanism]
Thus, the fixed cutting blade 28 integrally attached to the paper platform 15 is configured separately from the base plate 10. The paper table 15 is integrally provided with a fixed cutting blade 28 and a pair of guide members 17R and 17L (hereinafter referred to as “paper table assembly 15”). The paper mount assembly 15 is fitted and supported by the cutting opening 12 of the base plate 10 so as to be movable in the cutting orthogonal direction (Y direction shown in FIG. 8). In addition, a movable cutting blade 25 is axially supported on the drive rotating members 13d (drive side) and 13f (driven side) rotatably supported by the base plate 10. The movable cutting blade 25 is composed of a blade receiving holder 25h and a blade edge member 25c, and is fitted and supported on the transmission pin 13p of the drive rotating member 13 via a bearing sleeve 13s.

  Therefore, the above-described guide members 17R, 17L and the movable cutting blade 25 are sandwiched between the base plate 10 and the pressing member 19. A pressing member 19 (a pair of left and right stay members in the figure) is fixed to the base plate 10 with bolts or the like at a predetermined interval Ld. Guide members 17R and 17L and a movable cutting blade 25 are sandwiched between the base plate 10 and the pressing member 19 (see FIG. 8).

  In the above-described configuration, the press plate 21 is disposed between the base plate 10 and the movable cutting blade 25. A flat plate-shaped press plate 21 is sandwiched between the base plate 10 and the movable cutting blade 25, and the pressurizing surface 21p of the press plate 21 is disposed at a position for pressing and supporting the paper sheet surface on the paper table. The guide groove 17g formed in the above-described guide members 17R and 17L supports the press plate 21 so as to be movable up and down. A bent piece 10r is formed on the base plate 10, and a pressure spring 18 is provided on the bent piece 10r so as to press and urge the press plate 21 downward. Therefore, the press plate 21 disposed between the base plate 10 and the movable cutting blade 25 is configured such that the pressing surface 21p presses the paper sheet surface on the paper table 15.

  The press plate 21 is moved by the vertical movement of the movable cutting blade 25 so that the press plate 21 receives the non-operating position where the press plate 21 is retracted to a position separated from the sheet surface above the paper table 15 and the pressure spring 18. It moves up and down between the operating positions for pressing the upper sheet surface. Therefore, the upper end flange portion 25f of the movable cutting blade 25 and the engagement piece 21k of the press plate 21 are configured to engage with each other. Therefore, the movable cutting blade 25 and the drive rotating member 13 that moves up and down the same constitute a pressure releasing means.

  Next, the relationship between the fixed cutting blade 28 and the movable cutting blade 25 will be described with reference to the operation state explanatory diagrams shown in FIGS. 4B and 5B. As described above, the movable cutting blade 25 is supported by the pair of left and right drive rotation members 13d and 13f, and moves up and down with respect to the paper table 15 by the rotation. Therefore, in the state of FIG. 4B in which the movable cutting blade 25 stands by above the paper platform, the press plate 21 interlocked with the movable cutting blade 25 stands by in the non-operating position (standby position). In this state, the paper sheet P is inserted and set on the paper table 15.

  Therefore, after the paper sheet P is fed and set on the paper platform 15, when the drive rotating member 13 is rotated in a predetermined direction, the movable cutting blade 25 descends from the top dead center p1. When the movable cutting blade 25 is lowered by a predetermined amount, the press plate 21 is also lowered toward the sheet surface, and the upper end flange portion 25f of the movable cutting blade 25 is separated from the engagement piece 21k of the press plate 21. Then, the pressure surface 21p of the press plate 21 presses the paper sheet surface by the action of the pressure spring 18. FIG. 5B shows this state, and the press plate 21 presses the paper platform 15 from above by the action of the pressure spring 18.

[Configuration of guide plate]
As described above, the movable cutting blade 25 is supported on the base plate 10 by the drive rotary members (drive arms) 13d and 13f, and moves up and down in the cutting direction by the drive rotary members 13d and 13f. Further, the press plate 21 is urged in the cutting direction by the pressure spring 18, and at the same time, the upper surface of the paper sheet of the paper table 15 is moved from the position waiting above the paper table 15 in conjunction with the vertical movement of the movable cutting blade 25. It is comprised so that it may move to the position to press.

  Therefore, a cutting waste storage box 41 shown in FIG. 4B is disposed adjacent to and below the fixed cutting blade 28 of the paper platform 15. That is, the movable cutting blade 25 and the fixed cutting blade 28 are in sliding contact with each other to cut out the end portion of the paper sheet, and this end portion is spatially open. Accordingly, the cut paper piece falls from this end, and the cut waste storage box 41 is disposed at this position.

  Therefore, in the present invention, a guide plate 35 that guides the sheet bundle to the paper platform 15 is provided above the cutting waste storage box 41 that is spatially open. The guide plate 35 is provided with a guide surface 35g for guiding the sheet bundle to the paper platform 15, and the guide surface 35g is formed substantially on the same plane as or slightly higher than the paper platform 15, The bundle is guided from the downstream side of the paper platform 15. Therefore, the guide plate 35 is pivotally supported by a pair of left and right pressing members 19 by a shaft support pin (bearing member) 36 so as to be swingable. The shaft support pin 36 is provided with a winding spring 37 that constantly biases the guide plate 35 toward the stopper pin (stopper member) 38 side. The guide plate 35 locked by the stopper pin 38 is set at a position (guide position) where the guide surface 35g guides the sheet bundle to the paper table 15.

  An engaging cam 35c is formed integrally with the guide plate 35 pivotally supported in this manner, and this engaging cam (engaging portion of the guide plate) 35c is the lower end of the movable cutting blade 25 described above. The guide plate 35 is swung around the shaft support pin 36 by engaging with the engaging portion 25z. That is, the guide plate 35, which can be swung by the pivot pin 36, is positioned at the guide position by the winding spring 37, and when the movable cutting blade 25 is lowered by the cutting operation, the engaging cam 35 c of the movable cutting blade 25 is moved. When the guide plate 35 is pushed down by the lower end engaging portion 25z and swings counterclockwise in the drawing, the guide plate 35 is shifted from the guide position x1 to the retracted position x2.

  In the present invention, the relationship (operation timing) among the press plate 21 that moves up and down in the cutting direction, the movable cutting blade 25, and the guide plate 35 is set as follows. (1) When a sheet bundle is fed and set on the paper platform 15, the press plate 21 and the movable cutting blade 25 are positioned at a standby position retracted upward from the paper platform 15. At this time, the guide plate 35 is a guide. Each is set so as to be located at the position x1 (state of FIG. 4B described later). In this state, the sheet bundle is fed to the paper table 15 by a conveying means (roller, belt, etc.). (2) Next, the press plate 21 and the movable cutting blade 25 are lowered in the cutting direction simultaneously or at different timings, and the paper sheets on the paper table 15 are pressed and held by the pressing surface 21p of the press plate 21. At this time, the movable cutting blade 25 is set in front of cutting the sheet bundle while being lowered in the cutting direction (may be stopped at the standby position), and the guide plate 35 is positioned at the guide position x1 (FIG. 5 described later). (State of (b)).

  (3) With the press plate 21 pressing and holding the paper sheet, the movable cutting blade 25 is lowered in the cutting direction, and the engaging cam 35c of the guide plate 35 is pressed and swung by the lower end engaging portion 25z. As a result, the guide plate 35 is moved in posture from the guide position x1 to the retracted position x2 by the guide surface 35g. At this time, the movable cutting blade 25 is positioned before cutting the sheet bundle on the paper table 15 or is positioned in an initial cutting state (state shown in FIG. 6B described later). (4) Next, the movable cutting blade 25 is lowered to cut the paper sheet (bundle) on the paper table 15. At this time, the guide surface 35g is held at the retracted position x2 (state shown in FIG. 7B described later).

  The above operation will be described in detail with reference to FIGS. When the sheet bundle is fed and set on the paper mount 15 of the above (1), the above-mentioned drive rotation members (arm members in the figure are shown) 13d and 13f are positioned at the home position. At this time, the drive rotation members 13d and 13f are locked at the top dead center position p1 in FIG. In this state, the movable cutting blade 25 integrally connected to the drive rotation members 13d and 13f is also held at the upper standby position. At this time, the press plate 21 is pushed up by the engagement piece 21k engaging the upper end flange portion 25f of the movable cutting blade 25, and the elastic pressure of the pressure spring 18 is released. Accordingly, the press plate 21 is also held together with the movable cutting blade 25 at the standby position above the paper platform. The guide surface 35g of the guide plate 35 is positioned at the guide position x1 in a state where the engagement cam 35c is disengaged from the lower end engagement portion 25z of the movable cutting blade 25.

  The base plate 35 is provided with a guide member 32 disposed above the paper table and guiding the upper surface of the paper sheet. The guide member 32 and the guide plate 35 are disposed on the front and rear sides with the fixed cutting blade 28 interposed therebetween. The base plate 35 is provided with a guide surface 35g for guiding the bottom surface of the paper sheet P on the paper platform, and the guide member 32 is provided with a guide surface 32g for guiding the top surface of the paper sheet on the paper platform.

  Next, the drive rotation members 13d and 13f are rotated and started by the drive motor M and rotated counterclockwise from the state of FIG. 4A to the state of FIG. 5A. Then, the movable cutting blade 25 integrally connected to the shaft descends from the top dead center toward the bottom dead center. By this lowering operation of the cutting blade, the engagement piece 21k of the press plate 21 is disengaged from the upper end flange portion 25f of the movable cutting blade 25, and is lowered by the action of the pressure spring 18, and the paper surface on the paper platform 15 is lowered. Press and hold. At this time, the engagement cam 35c of the guide plate 35 is set to be separated from the lower end engagement portion 25z of the movable cutting blade 25, and the guide surface 35g is positioned at the guide position x1.

  Further, when the drive rotation members 13d and 13f are rotated to the state shown in FIG. 6A, the movable cutting blade 25 starts cutting the paper sheet on the paper table 15. At this time, as shown in FIG. 6B, the engaging cam 35c of the guide plate 35 is pressed by the lower end engaging portion 25z of the movable cutting blade 25, and the guide surface 35g is moved from the guide position x1 to the retracted position x2 shown in FIG. Move posture. Accordingly, the cut paper piece cut by the cutting blade (a part of which is connected to the paper sheet) hangs down to the lower cutting waste storage box 41 side by its own weight. As a result, the cut paper piece is not mixed into the uncut paper sheet cutting section.

  Next, when the drive rotation members 13d and 13f are rotated to the state shown in FIG. 7A, the movable cutting blade 25 finishes cutting the paper sheet on the paper table 15. At this time, as shown in FIG. 7B, the engaging cam 35c of the guide plate 35 is pressed against the lower end engaging portion 25z of the movable cutting blade 25, and the guide surface 35g is completely held in the retracted position x2, and the cut piece of paper is cut. Is fallen and stored in the cutting waste storage box 41.

[Configuration of movable cutting blade]
The configuration of the movable cutting blade 25 described above will be described with reference to FIGS. As described above, the pair of drive rotating members 13d and 13f are disposed on the base plate 10 at positions spaced along the cutting line CL. As shown in FIG. 3, the drive rotating member 13 has a pair of rotating shafts 13 x and 13 y supported by the base plate 10 at positions separated by a distance L in the cutting line CL direction. Drive rotation members 13d and 13f such as arm members and eccentric cams are fixed to the pair of left and right rotation shafts 13x and 13y. Each drive rotary member 13 is provided with a transmission pin (may be a cam follower) 13p at a position different from the rotary shafts 13x and 13y, and a movable cutting blade 25 is supported by the transmission pin 13p. Accordingly, when the pair of left and right drive rotation members 13d and 13f are rotated about the rotation shafts 13x and 13y, the movable cutting blade 25 moves up and down while drawing an arc along the base plate 10.

  A drive motor M is connected to the rotation shafts 13x and 13y of the drive rotation members 13d and 13f. A sprocket 30 is provided integrally with the rotary shafts 13x and 13y on the back side of the base plate 10, and a transmission chain 29 is bridged between the left and right sprockets 30. And the drive motor M is connected with the sprocket of the drive rotation member 13d located in the drive side via the reduction gear (not shown).

[Configuration of cutting blade]
As shown in FIG. 6, the movable cutting blade 25 is composed of a flat-plate shaped blade edge member 25c and a blade receiving holder 25h. The blade holder 25h is formed of a member having mechanical strength that can withstand the drag generated by cutting a paper sheet, and a concave groove 25w for mounting the blade member 25c is formed on the lower end edge thereof. Reference numeral 25b denotes a stay for reinforcement, which is integrally fixed to the blade holder 25h along the cutting line CL. A blade member 25c is attached to the recessed groove 25w with an adhesive tape or the like. The blade member 25c is inclined at a predetermined angle in the direction of the cutting line CL so as to gradually cut the paper sheet P from one end to the other end. The illustrated blade member 25c is inclined at an angle α shown in FIG. 4A within a range of 3 degrees to 15 degrees.

  Next, the connection relationship between the drive rotating members 13d and 13f and the movable cutting blade 25 shown in FIG. 4 will be described. As described above, the pair of left and right drive rotation members 13d and 13f are rotated at the same angular velocity in synchronization with the rotation of the drive motor M. At this time, the illustrated apparatus interlocks the drive-side rotary shaft 13x connected to the drive motor M and the driven-side rotary shaft 13y connected to the rotary shaft 13x by the transmission chain 29 so as to form a phase difference θ. It is.

  That is, the drive rotation member 13f of the driven side rotation shaft 13y is configured to rotate with a delay of the angle θ shown in FIG. 4A with respect to the drive rotation member 13d of the drive side rotation shaft 13x. Due to this phase difference (angle θ), the inclination angle α (shear angle) between the movable cutting blade 25 and the sheet surface is set to the angle α1 in the standby state in FIG. 4A and the angle in the shear start state in FIG. With α2, the latter angle is large (α1 <α2). Accordingly, it is possible to increase the shear angle for cutting the paper sheet without increasing the vertical stroke of the movable cutting blade 25 (without increasing the size of the apparatus). Then, with the progress of paper sheet cutting, the angle α3 in the middle of cutting in FIG. 6A and the angle α4 at the end of cutting in FIG. 7B are substantially the same as the angle α1 at the start of cutting. (Α1≈α2≈α3≈α4).

  As described above, the drive-side rotary shaft 13x and the driven-side rotary shaft 13y rotate at the same peripheral speed, and the phase difference between the drive-side drive rotary member 13d and the driven-side drive rotary member 13f attached thereto. θ is formed. In this relationship, at least one of the driving side and the driven side needs to freely connect the movable cutting blade 25 and the driving rotary member 13 in a direction perpendicular to the vertical cutting direction (if there is no such movement, the two driving rotary members Will buffer each other and their movement will be locked). Therefore, in the illustrated example, the driven rotary member 13f and the movable cutting blade 25 are fitted and supported in a freely movable manner by the long hole 11 (see FIG. 2).

  The above-mentioned movable cutting blade 25 is configured to cut the cutting blade while moving it in the cutting line CL direction when descending from above to cut the paper sheet P. The moving direction of the movable cutting blade 25 is reversed between the start of cutting and the end of cutting. That is, as shown in FIG. 4A, the movable cutting blade 25 stands by at the point p1 shown in the figure where the drive side rotation member 13d is located at the top dead center, and presses the plate at the point p2 shown in the figure rotated counterclockwise by a predetermined angle. 21 presses the paper surface. The cutting is started at the point p3 shown in the figure, and the cutting is finished at the point p4 (bottom dead point) shown in the figure.

  As described above, the movable cutting blade 25 moves while moving forward (left side in FIG. 4 (a)) while pushing into the paper sheet, so that the cutting depth is ensured even for a soft paper sheet. I can do it. At the end of cutting, the movable cutting blade 25 finishes cutting while moving to the right in FIG. 4A, so that the cutting surface is not disturbed. For example, when cutting a soft and soft material with a flat blade-shaped knife blade, cutting the paper sheet with the movable cutting blade 25 is easy to cut in the depth direction by pushing the blade edge forward at the start of cutting. It is understood from the fact that when the cutting is finished, the cut surface is adjusted by cutting the blade edge backward.

[Configuration of Image Forming Apparatus]
Next, the configuration of the post-processing apparatus and the image forming apparatus provided with the paper sheet cutting apparatus A will be described with reference to FIG. As the image forming apparatus B, various structures such as a copying machine, a printer, and a printing machine can be adopted, and an electrostatic printing apparatus is illustrated. In the image forming apparatus B, a paper feed unit 52, a printing unit 53, a paper discharge unit 54, and a control unit are built in a casing 51. A plurality of cassettes 52 a corresponding to the sheet size are prepared in the sheet feeding unit 52, and a sheet having a size designated by the control unit is fed out to the sheet feeding path 55. The sheet feeding path 55 is provided with a registration roller 55a, and after the sheets are aligned at the leading edge, the sheet is fed to the downstream printing unit 53 at a predetermined timing.

  The printing unit 53 is provided with an electrostatic drum 53a. Around the electrostatic drum 53a, a print head 53b, a developing device 53c, a transfer charger 53d, and the like are arranged. The print head 53b is composed of, for example, a laser light emitter, and forms an electrostatic latent image on the electrostatic drum 53a. A toner ink is attached to the latent image by the developing device 53c, and printing is performed on the sheet by the transfer charger 53d. . This print sheet is fixed by the fixing device 56 and carried out to the paper discharge path 54b. A paper discharge port 58 and a paper discharge roller 59 formed in the casing 51 are disposed in the paper discharge unit 54. The print sheet on which the image is formed in this manner is carried out from the paper discharge port 58 by the paper discharge roller 59.

  A scanner unit 45 shown in the figure optically reads a document image to be printed by the print head 53b. As is generally known, the platen 46 on which an original sheet is placed and set, a carriage 47 that scans an original image along the platen 46, and an optical device that photoelectrically converts an optical image from the carriage 47. A reading means (for example, a CCD device) 48 is included. In the illustrated example, a document feeder 49 for automatically feeding a document sheet to the platen 46 is provided on the platen 46.

[Configuration of finisher device (sheet handling device)]
Next, a finisher device C is connected to the downstream side of the image forming apparatus B described above, and the sheets on which the images are formed are aligned in a bundle shape, and the paper sheets aligned in the bundle shape are stapled, adhesive tape, and adhesive. Binding is done with glue, and the bookbinding process is performed. The paper sheets after the bookbinding process are cut and aligned by the paper sheet cutting apparatus A and stored in the paper discharge stacker. The finisher device C shown in FIG. 9 staples and binds the center of the bundled paper sheets, folds the saddle-stitched paper sheets into a booklet, and then cuts the folded leading edge. The apparatus to align is shown.

  Therefore, a carry-in path 61 that is continuous with the paper discharge port 58 of the image forming apparatus B is provided, and the stacking tray 62 is disposed on the downstream side of the path paper discharge port 61 a of the carry-in path 61. The tray is provided with a switchback roller 62a for transferring the sheet back and forth in the paper discharge direction and a rear end regulating member 62b for regulating the rear end of the sheet. The switchback roller 62a conveys the sheet from the path sheet discharge port 61a to the front end side of the tray in the sheet discharge direction, and after the sheet rear end enters the tray, the sheet is transferred in the direction opposite to the sheet discharge direction. Abutting the end regulating member 62b for positioning. The rear end regulating member 62b is swingable between a position protruding on the tray and a position retracted from the tray, and is connected to a shift means (not shown) such as an electromagnetic solenoid. The accumulation tray 62 is provided with a rear end pushing member 63 for carrying the accumulated sheet bundle to the downstream side.

  A side alignment member (not shown) is arranged on the stacking tray 62 so as to position and align the conveyance orthogonal direction of the sheet entering from the path discharge port 61a. Accordingly, the sheets from the path discharge port 61a are carried onto the tray, and are stacked in a bundle shape with the trailing end of the sheet being regulated by the trailing end regulating member 62b. Thereafter, the sheet bundle is carried out downstream by the rear end pushing member 63 in a state where the rear end regulating member 62b is retracted from the stacking tray 62.

  A bookbinding path 64 is provided downstream from the stacking tray 62, and a saddle stitch stapler 65 is disposed in the bookbinding path 64. Although the structure of the saddle stitch stapler 65 is not described in detail, it is composed of a unit that inserts a staple into the sheet bundle and bends the leading end, and an upper unit that inserts the staple and a lower unit that bends the leading end transfers the sheet bundle. The bookbinding path 64 is arranged vertically. The bookbinding path 64 is provided with a first stopper 64a and a second stopper 64b for locking the leading end of the sheet bundle. The first stopper 64a is configured by a movable member that can freely move in and out of the bookbinding path 64, and is arranged so that the saddle stitching stapler 65 is positioned at the center of the sheet bundle in a state where the leading end of the sheet bundle is locked. Accordingly, the sheet bundle accumulated on the accumulation tray 62 is transferred to the bookbinding path 64 by the rear end pushing member 63, and is bound by the saddle stitching stapler 65 with the front end locked by the first stopper 64a.

  After the first stopper 64a is retracted from the bookbinding path 64, the sheet bundle that has been saddle stitched and bound as described above is locked to the second stopper 64b on the downstream side. In this state, a folding roll 66a and a middle folding knife 66b are arranged so as to bend the center (staple binding position) of the sheet bundle. The middle folding knife 66b is composed of a blade that can move up and down in the direction of the arrow, and guides the sheet bundle in the bookbinding path to the folding roll 66a. The folding roll 66a is composed of a pair of rolls, and is bent at the center of the sheet bundle and transported to the paper discharge path 67 on the downstream side.

  A paper discharge path 67 arranged on the downstream side of the folding roll 66a is constituted by a switchback path, and guides the sheet to the cutting path 68. In the figure, 67a is a switchback roller, and 67b is an intermediate tray. The cutting device A is arranged in the cutting path 68 configured as described above. The cutting apparatus A is the apparatus described with reference to FIG. 1, and the operation thereof will be described later. In the cutting path 68, a belt conveying means 69 for transferring the sheet bundle and a grip rotating means 70 are arranged.

  In the above configuration, the sheets on which the image is formed by the image forming apparatus B are stacked and aligned on the stacking tray 62 in a bundle. Therefore, when a control CPU (not shown) provided in the finisher apparatus C receives a job end signal from the image forming apparatus B, the rear end regulating member 62b is retracted out of the tray, and the rear end pushing member 63 moves the sheet bundle downstream. To the bookbinding path 64. Then, the leading end of the sheet bundle is brought into contact with the first stopper 64a in the bookbinding path and stopped. In this state, the saddle stitching stapler 65 is operated to staple the center (center folding position) of the sheet bundle. Next, the control CPU retracts the first stopper 64a out of the path and stops the sheet bundle by abutting against the second stopper 64b further downstream. Then, the center of the sheet bundle (the staple binding position) faces the folding roll 66a, and in this state, the middle folding knife 66b is moved in the direction of the arrow shown. Then, the sheet bundle is guided to the folding roll 66a while being bent at the center. Therefore, when the folding roll 66a is rotationally driven, the sheet bundle is bent at the center and transferred to the paper discharge path 67 on the downstream side.

  In this way, the sheet bundle guided to the paper discharge path 67 is sent to the cutting path 68 with the conveying direction reversed. In the cutting path 68, the sheet bundle is switched back by the belt conveying means 69 to position the leading end. In this leading edge positioning, the sheet bundle is conveyed to the right side in FIG. 8 with the movable cutting blade 25 retracted to the standby position, and the entire sheet bundle enters the cutting path 68. Accordingly, the sheet bundle is returned to the left side of the figure by the belt conveying means 69 and the sheet bundle is positioned so that the predetermined cutting line CL coincides with the position of the cutting blade. Next, the control CPU nips the sheet bundle by the grip rotating means 70 and then presses and holds the sheet bundle by the pressing means 20. Therefore, the movable cutting blade 25 is moved in a predetermined direction. In this cutting state, the edge of the sheet bundle is cut by the procedure described above with reference to FIGS.

  Next, after cutting the small edge portion of the sheet bundle, the control CPU releases the pressing means 20 and operates the grip rotating means 70 to rotate the sheet bundle, for example, 90 degrees so that the top portion faces the cutting position. After the sheet bundle is rotated, the sheet bundle is fed to the cutting line CL by a predetermined amount. The sheet bundle is transferred by moving the grip rotating means 70 to the right side in the drawing or by the belt conveying means 69. Thereafter, the top of the sheet bundle is cut, and the fore edge is cut similarly. When the cutting of the sheet bundle in the three directions is completed, the control CPU carries out the sheet bundle to the sheet discharge stacker 71 by the belt conveying means 69.

  In the illustrated finisher device C, the case of binding with the saddle stitch stapler 65 is shown. In this case, an adhesive is applied to the end face of the bundle of sheets stacked in a bundle, and the case binding is performed with a cover sheet (case binding). Of course, it is also possible to bind the top paste without covering with a cover sheet.

10 Base plate (device frame)
13d Drive rotation member (drive arm)
13f Drive rotation member (drive arm)
13p Transmission pin 15 Paper mount 17R Guide member 17L Guide member 17g Guide groove 18 Pressing spring 19 Pressing member 20 Pressing means 21 Press plate 21p Pressing surface 21k Engagement piece 25 Movable cutting blade 25z Lower end engaging part 25f Upper end flange part 25c Blade member 28 Fixed cutting blade 32 Guide member 32g Guide surface 35 Guide plate 35g Guide surface 35c Engagement cam 36 Shaft support pin (bearing member)
37 Winding spring 38 Stopper pin (stopper member)
41 Cutting waste storage box x1 Guide position x2 Retraction position M Drive motor A Paper sheet cutting device (trimmer unit)

Claims (6)

An apparatus for cutting paper sheets along a predetermined cutting line,
A paper platform for supporting paper sheets;
A base plate disposed in a direction substantially perpendicular to the paper table;
A press plate that is supported so as to be movable along the base plate and presses and holds the sheet surface;
A flat plate-shaped movable cutting blade that is movably supported along the base plate and cuts paper sheets on the paper table;
A fixed cutting blade disposed on the paper platform side in sliding contact with the movable cutting blade;
A drive motor that moves the movable cutting blade and the press plate up and down in the cutting direction;
A cutting waste storage box for storing a piece of cutting paper disposed adjacent to the fixed cutting blade;
A guide plate that is disposed above the cutting waste storage box and guides paper sheets to the paper table;
With
The guide plate is configured to be swingable so that a guide surface for guiding paper sheets to the paper mount is retracted to the waste storage box side,
The guide plate is configured to store the waste from a position where the guide surface guides the paper sheet to the paper table in conjunction with the movable cutting blade that descends in a cutting direction after the press plate presses and holds the paper sheet. A paper sheet cutting apparatus configured to retract to the box side. The base plate is provided with a pressing member at a predetermined interval,
Between the base plate and the pressing member, the press plate and the movable cutting blade are supported so as to be movable in a cutting direction orthogonal to the paper sheet surface on the paper table,
The press plate is provided with a pressure spring for urging in the cutting direction,
The movable cutting blade is provided with a pair of left and right drive rotating members that move up and down between a standby position above the paper platform and a cutting position for cutting the paper sheets,
By the rotation of the pair of driving rotating members, the press plate stands by at the standby position above the paper table against the pressure spring and presses the paper sheets on the paper table by the rotation of the driving rotating member. Linked to hold,
2. The paper according to claim 1, wherein the movable cutting blade swings and retracts the guide plate after the press plate presses and holds the paper sheets by the rotation of the driving rotary member. Leaf cutting device. In the holding member,
A bearing member that pivotally supports the guide plate;
A spring member that urges the guide plate to a position where the guide surface guides the paper sheet to the paper table;
A stopper member for locking the guide plate at a position where the guide surface guides the paper sheet to the paper table;
Is provided,
The guide plate is provided with an engagement cam for swinging the guide surface from a position for guiding paper sheets to the paper table from a retracted position by a downward movement of the movable cutting blade in the cutting direction. The paper sheet cutting apparatus according to claim 2. The base plate is disposed above the paper table and is provided with a guide member for guiding the upper surface of the paper sheet.
The guide member and the guide plate are arranged on the front and rear sides of the fixed cutting blade,
The base plate guides the bottom surface of the paper sheet on the paper table, and the guide member has a guide surface for guiding the top surface of the paper sheet on the paper table. The paper sheet cutting apparatus according to 1. Tray means for collecting sequentially supplied sheets in a bundle;
A bundle binding means for binding the sheet bundle from the tray means;
A paper sheet cutting device for cutting a sheet bundle bound by the bundle binding means;
With
A finisher apparatus comprising the sheet cutting apparatus according to any one of claims 1 to 4. 6. The finisher according to claim 5, wherein a sheet bundle folding unit that folds the sheet bundle bound by the bundle binding unit is disposed between the bundle binding unit and the paper sheet cutting apparatus. apparatus.

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