JP5943705B2 - Cutting apparatus, bookbinding apparatus provided with the same, and image forming system - Google Patents

Description

  The present invention relates to a sheet bundle cutting apparatus for cutting and aligning (trimming) one or three directions of sheet bundles that are partly stacked in a bundle, and relates to an improvement of a paper piece scrap removing mechanism that removes a cut paper piece from a cutting position.

  In general, for this type of sheet cutting apparatus, a cutting method is known in which a sheet bundle set at a cutting position is cut with a flat blade cutter along a predetermined cutting line. In this case, the sheet bundle is set on a fixed blade and fixed by a press means, and the cutter blade is vigorously lowered from above to cut the sheet bundle.

  For example, in Patent Document 1, as a bookbinding apparatus, sheets sent from an image forming apparatus are aligned and collected in a bundle, and an adhesive is applied to the sheet bundle and bound on a cover sheet. A bookbinding system that cuts and aligns three directions with a cutting means (cutter device) is disclosed. This document discloses an apparatus for cutting a sheet bundle set on a blade receiving member using a flat cutter blade as cutting means.

  In this case, the blade receiving surface of the blade receiving member needs to be made of a soft material such as a resin material or a rubber material, which causes a problem that the piece of paper adheres to the blade receiving surface when the sheet is cut. Therefore, in this document, a mechanism is proposed in FIG. 9 in which a brush-like rotating member is provided at the cutting position of the blade receiving surface to scrape away the staying paper pieces adhering to the blade receiving surface. At the same time, a mechanism has also been proposed in which a wiper-shaped sweeper member is disposed at the cutting position of the blade receiving surface, and the blade receiving surface is moved up and down after the sheet is cut to scrape the staying paper pieces.

  Further, Patent Document 2 discloses a mechanism for sweeping away a piece of cut waste paper caught on a blade receiving surface by moving the cut sheet bundle up and down along the blade receiving surface. This is because if the blade receiving surface is made of a soft material, the corners of the scrap paper pieces after being cut are sandwiched so as to sink into the blade receiving surface and are not stored in the waste box disposed below, but hang down from the blade receiving surface. This is because it remains in the state.

JP 2007-61967 A JP 2010-82790 A

  As described above, there arises a problem that a piece of cut paper adheres to and remains on the blade receiving surface made of a soft material, and the cutting line is distorted or wrinkles due to unevenness occur when the subsequent sheet bundle is cut. In this case, conventionally, a brush member (rotating brush or blade-like brush) is provided at a position facing the blade receiving surface, and the brush member is rotated or the blade receiving surface is moved up and down (see Patent Document 1). Similar to the residual paper piece removal by the brush member, the method of Patent Document 2 sweeps the adhered paper piece by reciprocating back and forth along the blade receiving surface of the cut sheet bundle (bookbinding bundle; hereinafter the same). .

  Any of the conventional methods employs a mechanism for scrubbing and adhering the paper pieces that have entered the blade receiving surface and scraped off. However, the following problems arise in the mechanism for scraping or sweeping off the adhering paper pieces. That is, when a part of the sheet bundle and the cut paper piece are connected without being separated (incomplete cutting), there is a problem that the sheet bundle side is broken when the paper piece is scraped off. When such a problem occurs, the bookbinding quality is remarkably impaired, and it becomes necessary to rebound as a serious defect. At this time, for bookbinding, it is necessary to repeat the bookbinding operation from image formation. Even in the case of this bookbinding, there is a possibility that the above-mentioned problem may reoccur at the last trimming.

  The inventor cuts one side of the sheet bundle, and then changes the posture of the sheet bundle in order to perform subsequent operations such as changing the bundle posture in the paper discharge direction or cutting other edges. At the same time as sweeping operation to drop the waste paper piece hanging down on the blade receiving surface to the lower waste box by changing the posture of the sheet bundle, it rotates to tear the incompletely cut paper piece along the sled cutting line. This led to the idea that the above-mentioned problems can be solved.

  In the present invention, when cutting the bound sheet bundle in one direction or three directions, the residual paper piece adhering to the blade receiving surface after cutting is dropped and stored in the lower waste box, and at the same time, the residual paper piece and the sheet bundle are combined. The problem is to improve the finishing quality by tearing along the cutting line when parts are connected without being separated.

  In order to achieve the above object, the present invention provides a bundle that deflects the posture of a sheet bundle upstream of the cutting position in a cutting structure that cuts the sheet bundle while sliding the cutting blade from one end to the other end along a predetermined cutting line. Posture deflecting means is provided, and the bundle posture deflecting means is rotated in a direction in which the cutting start end side first moves away from the cutting line after the sheet bundle is cut.

  The configuration will be described in detail. A device for cutting at least one side of a bound sheet bundle, a processing path for guiding the sheet bundle to a predetermined cutting position, and a flat blade-shaped cutting disposed at the cutting position. A blade, a blade receiving member disposed at a position opposed to the cutting blade via a processing path, a bundle posture deflecting unit that is disposed upstream of the cutting position and deflects a posture of a sheet bundle to be cut, and A waste box for storing a cutting paper piece disposed on the downstream side of the cutting position, a cutting blade driving means that reciprocates between a cutting position where the cutting blade comes into contact with the blade receiving member, and a standby position spaced apart from the cutting position. And a cutting control means for controlling the cutting blade driving means and the bundle posture deflecting means.

  The bundle posture deflecting unit is configured so that a predetermined edge side faces a cutting position by selecting a forward / reverse direction as a rotation direction of the sheet bundle, and the cutting blade has a predetermined cutting line direction from one end to the other end of the sheet bundle. It is configured to cut while sliding. The cutting control means controls the bundle posture deflection means so that the cutting start end rotates first and the cutting end end rotates in an angular direction away from the cutting line after cutting.

  In the present invention, the cutting blade is cut while sliding from one end of the sheet bundle to the other end side, and after the cutting, the sheet bundle is swung by the bundle posture deflecting means in a direction in which the cutting start end side first moves away from the cutting line. Therefore, the following effects can be obtained.

  Since the residual paper piece that is attached to the blade receiving surface and hangs down is swept down from the blade receiving surface by the swiveling operation of the sheet bundle, the residual paper piece does not interfere with the subsequent cutting operation. At the same time, when the cut paper piece and the sheet bundle are connected due to poor cutting, the sheet bundle rotates in the direction in which the cutting start end side first leaves the cutting line after the cutting is completed, and the connected paper sheet follows the cutting line. It will be torn.

  In this way, the present invention causes the incomplete cutting to occur on the cutting end side by cutting the sheet bundle while sliding the flat blade-shaped cutting blade from one end to the other end, and the paper sheets connected after the cutting operation are Since the sheet bundle is rotated so as to be torn along the cutting line, the connected paper sheets can be separated in the continuous cutting line direction simultaneously with the action of dropping the cut paper pieces adhering to the blade receiving surface.

  Further, according to the present invention, the top edge (or ground) edge of the sheet bundle is formed on the blade receiving surface by setting the back binding portion of the sheet bundle to the cutting start end side and positioning the top portion or the ground portion on the cutting end end side. Is caught, and the weight of the back binding portion acts so as to hang downward, so that the remaining paper piece is surely separated from the blade receiving surface by the weight of the back binding portion and the rotation operation of the sheet bundle and falls.

1 is an explanatory diagram of an overall configuration of an image forming system including a bookbinding apparatus according to the present invention. FIG. 2 is an explanatory diagram of an overall configuration of a bookbinding apparatus in the apparatus of FIG. 1. FIG. 3 is a main part explanatory view showing a bundle posture deflection mechanism and a cutting mechanism in the apparatus of FIG. 2. It is a detailed explanatory view of the cutting mechanism in the apparatus of FIG. 3, (a) shows the whole perspective view, (b) and (c) shows the movement of the cutting blade. Explanatory drawing of the operation state of the cutting blade in the cutting mechanism of FIG. FIGS. 3A and 3B are diagrams illustrating a state of trimming and cutting a sheet bundle in the apparatus of FIG. 2, in which FIG. 3A illustrates a state in which the top portion is disconnected, FIG. 3B illustrates a state in which the ground portion is cut, and FIG. Indicates. Explanatory drawing of the control structure in the system of FIG. It is explanatory drawing of the operation state which removes the sheet piece adhering to a blade receiving surface, (a) shows a cross-sectional shape, (b) shows a planar shape.

  Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the drawings. FIG. 1 is an explanatory view showing the overall configuration of an image forming system provided with a bookbinding apparatus B according to the present invention. The bookbinding apparatus B has a cutting apparatus C built therein. FIG. 2 is a main part enlarged explanatory view showing the cutting unit. In such a configuration, an image is formed on a sheet by the image forming apparatus A, and the bookbinding apparatus B aligns and accumulates the sheets sent from the image forming apparatus A, and glues them to the back portion of the sheets and binds them to the cover sheet. A cutting mechanism for trimming and cutting the bound sheet bundle is built in on the downstream side of the bookbinding portion. Each configuration will be described below.

[Configuration of Image Forming Apparatus]
As the image forming apparatus A, as shown in FIG. 1, various structures such as a copying machine, a printer, and a printing machine can be adopted, but an electrostatic printing apparatus is illustrated. In the image forming apparatus A, a paper feed unit 2, a printing unit 3, a paper discharge unit 4, and a control unit are built in a casing 1. A plurality of cassettes 5 corresponding to the sheet size are prepared in the sheet feeding unit 2, and a sheet having a size designated by the control unit is fed out to the sheet feeding path 6. A registration roller 7 is provided in the sheet feeding path 6 and the sheet is fed to the downstream printing unit 3 at a predetermined timing after the leading edges of the sheets are aligned.

  The printing unit 3 is provided with an electrostatic drum 10. A print head 9, a developing device 11, a transfer charger 12, and the like are disposed around the electrostatic drum 10. The print head 9 is composed of, for example, a laser light emitter, and forms an electrostatic latent image on the electrostatic drum 10. A toner ink is attached to the latent image by the developing device 11 and printed on a sheet by the transfer charger 12. . This print sheet is fixed by the fixing device 13 and carried out to the paper discharge path 17. The paper discharge unit 4 is provided with a paper discharge port 14 and a paper discharge roller 15 formed in the casing 1. Reference numeral 16 denotes a circulation path. The print sheet from the paper discharge path 17 is turned upside down on the switchback path and then sent to the registration roller 7 again to form an image on the back surface of the print sheet. In this way, the print sheet on which one side or both sides are formed is carried out from the paper discharge port 14 by the paper discharge roller 15.

  In the figure, reference numeral 20 denotes a scanner unit which optically reads a document image to be printed by the print head 9. As is generally known, the document sheet is placed and set 23, the carriage 21 that scans the document image along the platen 23, and the optical reading that photoelectrically converts the optical image from the carriage 21. Means (for example, a CCD device) 22. In the illustrated example, a document feeder 25 for automatically feeding a document sheet to the platen is provided on the platen.

[Configuration of bookbinding device]
Next, the bookbinding apparatus B connected to the image forming apparatus A will be described with reference to FIGS. The bookbinding apparatus B includes a stacking unit 40 that stacks and arranges printing sheets in a bundle in the casing 30, an adhesive application unit 55 that applies adhesive paste to the sheet bundle from the stacking unit 40, and an adhesive. A cover binding means 60 for binding the cover sheet to the coated sheet bundle is configured.

[Configuration of transport route]
The conveyance path of each sheet will be described. In the casing 30, a carry-in path 31 having a carry-in entrance 31 a continuous with the paper discharge port 14 of the image forming apparatus A is provided. The conveyance path 34 is connected via a path switching flapper 36. A bookbinding path 33 is connected to the intermediate sheet transport path 32 via the stacking unit 40, and a post-processing path 38 is connected to the cover sheet transport path 34. The bookbinding path 33 is arranged in a direction that cuts the apparatus in a substantially vertical direction, and the cover transport path 34 is arranged in a direction that crosses the apparatus in a substantially horizontal direction. The bookbinding path 33 and the cover transport path 34 intersect (orthogonal) each other, and a cover binding means 60 described later is disposed at the intersection.

  The carry-in path 31 configured as described above is connected to the paper discharge port 14 of the image forming apparatus A, and receives a print sheet from the image forming apparatus A. In this case, the image forming apparatus A carries out a print sheet (middle sheet) Sn printed with content information and a print sheet (cover sheet) Sh printed with a title used as a cover cover. In this way, the carry-in path 31 is branched into the intermediate sheet conveyance path 32 and the cover sheet conveyance path 34, and the print sheets are distributed and conveyed to the respective paths via the path switching flapper 36.

  On the other hand, an inserter device 26 is connected to the carry-in path 31 so that cover sheets that are not subjected to printing processing by the image forming apparatus A are separated from the paper feed tray 26a one by one and supplied to the carry-in path 31. is there. The inserter device 26 is provided with one or a plurality of stages of paper feed trays 26a. A paper feed means for separating and feeding stacked sheets one by one at the front end of the tray, and a downstream side of the paper feed means. A paper feed path 27 is provided, and the paper feed path 27 is connected to the carry-in path 31 via a path switching piece 28. Also, the carry-in path 31 includes a transport roller 31b, the intermediate-paper transport path 32 includes a transport roller 32a, and the bookbinding path 33 includes a grip transport unit 47, a bundle posture deflecting unit 64, which will be described later, and a paper discharge roller (paper discharge unit). 67 is arranged.

  Further, a transport roller 34a is disposed in the cover transport path 34, and a transport roller 38a is disposed in the post-processing path 38, and each is coupled to a drive motor. Note that 34g shown in FIG. 3 is a movable guide of the cover sheet conveyance path 34, and a pair of guides are arranged on the left and right of a cover binding position F, which will be described later, and the upstream and downstream sides of the cover sheet Sh fed to this cover binding position F are shown. I will guide each one. The pair of movable guides 34g are connected to a drive motor (not shown) so as to retreat upward (during the cover binding process) from the cover binding position F.

[Configuration of stacking unit]
The stacking tray 41 disposed at the paper discharge port 32b of the intermediate paper conveyance path 32 stacks and stores sheets from the paper discharge port 32b in a bundle. As shown in FIG. 2, the stacking tray 41 is composed of a tray member arranged in a substantially horizontal posture, and a forward / reverse roller 42a and a carry-in guide 42b are provided above the tray member. Then, the print sheet Sn from the paper discharge port 32b is guided onto the stacking tray by the carry-in guide 42b and stored by the forward / reverse rotation roller 42a. The forward / reverse roller 42a transfers the printing sheet Sn to the front end side of the stacking tray 41 by forward rotation, and restricts the rear end of the sheet against the regulating member 43 disposed at the rear end (right end in FIG. 2) by reverse rotation. .

  Further, the stacking tray 41 is provided with sheet side aligning means (not shown), and both side edges of the printed sheets stored on the tray are aligned to the reference position. With such a configuration, the printing sheets from the intermediate paper conveyance path 32 are sequentially stacked on the stacking tray and aligned in a bundle.

  The stacking tray 41 is provided with a sheet bundle thickness identification means (not shown) so as to detect the thickness of the sheet bundle stacked on the tray. For example, the thickness of the sheet bundle can be identified by providing a paper touch piece in contact with the uppermost sheet on the tray and detecting the position of the paper touch piece with a sensor. As the other sheet bundle thickness identifying means, for example, a sheet that is carried out from the paper discharge sensor Se3 onto the stacking tray is detected, and a counter for counting signals from this sensor is provided, and a job end signal from the image forming apparatus A is provided. The thickness of the sheet bundle can be identified by multiplying the total number of counted sheets by the average paper thickness.

[Configuration of grip conveying means]
In the bookbinding path 33, grip conveying means 47 for transferring the sheet from the stacking tray 41 to the adhesive application position E on the downstream side is disposed. As shown in FIG. 2, the grip conveying means 47 deflects the sheet bundle stacked on the stacking tray 41 from the horizontal posture to the vertical posture, and the sheet bundle is adhered along the bookbinding path 33 arranged substantially in the vertical direction. Transfer set to application position E. For this reason, the stacking tray 41 is moved from the stacking position (solid line in FIG. 2) to the transfer position (broken line in FIG. 2), and the sheet bundle is transferred to the grip conveying means 47 prepared at the transfer position.

[Configuration of adhesive application part]
An adhesive application means 55 is disposed at the adhesive application position E of the bookbinding path 33. As shown in FIG. 2, the adhesive application means 55 is composed of a glue container 56 that accommodates a hot-melt adhesive, an application roll 57, and a roll rotation motor MR. Heating means (not shown) such as an electric heater is embedded in the paste container 56, and the temperature of the adhesive in the container is controlled to a predetermined melting temperature by a temperature sensor disposed in the container. The glue container 56 configured as described above is reciprocated by the drive motor MS in the front and back direction in FIG. 2 along the edge of the sheet bundle sent to the adhesive application position E. Therefore, an adhesive having a predetermined thickness is applied to the edge of the sheet bundle (lower edge in FIG. 2) by the application roll 57 that rotates simultaneously with the reciprocation of the glue container 56.

[Configuration of cover binding means]
A cover binding means 60 is disposed at the cover binding position F of the bookbinding path 33. As shown in FIG. 3, the cover binding means 60 includes a back plate 61, a back folding plate 62, and a folding roll 63. At the cover binding position F, the above-described cover transport path 34 is arranged, and the cover sheet Sh is fed from the image forming apparatus A or the inserter 26.

  Therefore, the back plate 61 is composed of a plate-like member that backs up the cover sheet Sh, and is disposed in the bookbinding path 33 so as to freely advance and retract. A sheet bundle (inner paper) is joined to the cover sheet Sh supported by the back plate 61 in an inverted T shape. Therefore, the back folding plate 62 is composed of a pair of left and right press members, and is configured to be moved toward and away from each other by a driving means (not shown) in order to back-fold the back portion of the cover sheet joined in an inverted T shape. Yes. The folding roll 63 is composed of a pair of rollers that fold and finish the back-folded sheet bundle.

  Sheets formed with an image with the above-described configuration are collected and aligned by the bookbinding apparatus B, and the cover sheet and its back are glued and bound together. Therefore, the sheet bundle that has been bound into a booklet is stored in the stack tray 68 disposed on the downstream side. 69 shown in the figure is a waste box for storing cut paper pieces. In the present invention, a bundle posture deflecting unit 64 for changing the bundle posture of the sheet bundle and a cutting unit 65 are disposed in a path from the bookbinding processing unit to the stack tray 68. The bound sheet bundle is trimmed and trimmed in one or three directions by the bundle orientation deflecting unit 64 and the trimming unit 65, and trimmed to the stack tray 68. Hereinafter, the bundle posture deflection mechanism and the cutting mechanism will be described.

[Configuration of bundle posture deflection means]
As shown in FIG. 2, a bundle posture deflecting unit 64 is disposed in the bookbinding path 33 between the folding roll 63 and the cutting position G. This bundle posture deflecting means 64 deflects the top and bottom direction of the sheet bundle and transfers it to the cutting position G on the downstream side. The illustrated bundle posture deflecting unit 64 deflects the sheet bundle mounted from the cover binding position F in a predetermined direction (posture), and simultaneously transfers the sheet bundle to the cutting unit 65 on the downstream side. Therefore, the bundle posture deflecting means 64 (the turntable mechanism shown in the figure) has a function of deflecting the sheet bundle in the vertical direction and a sheet bundle conveying means for feeding the posture-deflected sheet bundle to the downstream cutting position G. It is composed.

  The configuration of the bundle posture deflection means 64 will be described with reference to FIG. Turntables 64a and 64b are provided that rotate by gripping the sheet bundle fed from the folding roll 63 from the front and back directions. The turntables 64a and 64b are provided on a unit frame 64x attached to the apparatus frame so as to be movable up and down (vertical direction in FIG. 3). A pair of turntables 64a and 64b are rotatably supported by the unit frame 64x with the bookbinding path 33 interposed therebetween.

  The pair of turntables includes a fixed table 64a and a movable table 64b. The movable table 64b is supported so as to be movable in the sheet bundle thickness direction (left and right direction in the figure orthogonal to the bookbinding path 33). The turntables 64a and 64b are provided with turning motors Mt1 and Mt2 so as to deflect the posture of the sheet bundle in the bookbinding path 33. The movable table 64b is equipped with a grip motor Mg that moves in the left-right direction in FIG.

  The sheet support surface of the fixed table 64a and a blade receiving surface of a cutting blade 65x described later are disposed so as to be substantially in the same plane. Accordingly, the sheet bundle that pivots on the turntables 64a and 64b pivots so as to slide and sweep the support surface 64y and the blade receiving surface 66x of each table.

  Thus, the sheet bundle guided to the cutting position G of the bookbinding path 33 is gripped by the pair of left and right turntables 64a and 64b, and the bundle posture is deflected by the turning motors Mt1 and Mt2. For example, when the sheet bundle having the back portion carried downward is rotated 90 degrees clockwise or counterclockwise, the top portion or the ground portion is sent to the cutting position G. When the sheet bundle is further rotated 90 degrees from the top portion or the ground portion, the edge of the sheet bundle is deflected to the cutting position, and trimming of the edge can be performed.

  The movable turntable 64b is provided with a grip sensor (not shown) to detect that the sheet bundle is securely gripped between the left and right turntables 64a, 64b. , 64b is driven to turn. The unit frame 64x can move the sheet bundle up and down along the bookbinding path 33 by a lifting motor Ma. Although the control of the lift motor Ma will be described later, the cutting width (cut amount) of the sheet bundle at the cutting position G is set by the rotation amount control (feed amount control) of the lift motor Ma.

[Composition of cutting means]
A cutting means 65 is disposed downstream of the bundle posture deflecting means 64. As shown in FIG. 3, the cutting means 65 includes a cutting edge press member 65b that presses and supports the cutting edge of the sheet bundle on the blade receiving member 66, and a cutting blade unit 65a. The cutting edge press member 65b is arranged at a position facing the blade receiving member 66 arranged in the bookbinding path 33, and is constituted by a pressure member (pressure means) that moves in a direction orthogonal to the sheet bundle by a driving means (not shown). ing. The cutting blade unit 65a includes a flat blade-shaped cutting blade 65x and a cutter motor (driving means) Mc that drives the cutting blade 65x. By the cutting means 65 having such a configuration, a predetermined amount of the peripheral edge except the back portion of the sheet bundle that has been bound into a booklet is cut and aligned.

  The cutting blade 65x is a flat blade-shaped blade tip as shown in FIG. 4 and is configured with a blade width L1 longer than the sheet width L. The standby position (state shown in FIG. 3) is spaced from the blade receiving member 66 by a distance d. It is supported so as to be able to reciprocate between a cutting position where it abuts on the receiving member 66 and is connected to a cutter motor (driving means) Mc.

  The blade receiving member 66 is disposed to face the cutting blade 65x with a sheet (bundle) interposed therebetween, and is fixed to an apparatus frame (not shown). The blade receiving member 66 includes a blade receiving surface 66x that receives the cutting edge of the cutting blade 65x. The blade receiving surface 66x is made of a resin, a rubber material, and a polypropylene resin in the drawing having a hardness that does not damage the cutting edge of the cutting blade 65x during cutting.

[Explanation of cutting mechanism]
The cutting means 65 arranged at the cutting position G will be described with reference to FIG. The cutting blade 65x is constituted by a flat blade cutter, is arranged at a cutting position G on the downstream side of the bundle posture deflecting means 64, and is configured to reciprocate along a cutting line XX set in the illustrated horizontal direction. Yes. The flat blade-shaped cutting blade 65x is supported by the apparatus frame so as to be movable in the cutting line XX direction.

  A guide pin 80 and cam pins 81a and 81b are implanted in the cutting blade 65x. The guide pin 80 is inserted into the relief groove 82 of the frame 85, and the cam pins 81a and 81b are inserted into the cam grooves 82a and 82b formed in the frame 85, respectively. It is fitted. Therefore, an engagement groove 83 a of a slide member 83 that moves in the left-right direction in the figure is fitted to the guide pin 80, and a ball screw (hereinafter referred to as a screw screw) 84 is fitted to the slide member 83. A cutter motor Mc composed of a DC motor capable of forward and reverse rotation is connected to the screw screw 84 via a high speed side electromagnetic clutch 86a and a low speed side electromagnetic clutch 86b.

  Accordingly, when the cutter motor Mc is driven and rotated, the screw screw 84 is rotated and the slide member 83 is moved in the axial direction. The high-speed electromagnetic clutch 86a moves at a high speed, and the low-speed electromagnetic clutch 86b moves at a low speed. As the slide member 83 moves, the guide pin 80 also moves in the axial direction. For example, when the cutter motor Mc is rotated clockwise, the guide pin 80 moves in the right direction in the figure, and when it rotates counterclockwise, it moves in the left direction in the figure. The cutting blade 65x in which the guide pin 80 is implanted is also fast in the same direction. Or move at low speed.

  The cutting blade 65x has a pair of left and right cam pins 81a and 81b that are engaged with the cam grooves 82a and 82b so as to move in the vertical direction in the figure. In particular, in the illustrated cam grooves 82a and 82b, right cams C1a and C1b that are guided when the cutting blade 65x moves to the right and left cams C2a and C2b that are guided when the cutting blade 65x moves to the left are arranged with different inclination directions. .

  Accordingly, when the cutting blade 65x moves to the right from the illustrated position (home position), the cutting blade 65x moves downward along the right cams C1a and C1b while moving to the cutting position. Similarly, when the cutting blade 65x moves to the left, it gradually descends and moves to the cutting position while moving to the left along the left cams C2a and C2b. The right cams C1a and C1b and the left cams C2a and C2b that form the left and right pairs are inclined as shown in FIG. 4B when the cutting blade 65x is moved to the right with different inclination angles (phase differences). When moving to, it is inclined as shown in FIG. This cam makes the cutting blade 65x in a horizontal posture at the home position Hp and the cutting position Cp in FIG.

  That is, the cutting blade 65x is inclined so that the right end gradually becomes lower from the horizontal posture when moving to the right and gradually descends to reach the cutting position Cp in the horizontal posture, and the same applies to the left movement. The reason why the cutting blade 65x is inclined in this way is to gradually cut the sheet bundle from one end to the other end, and the right inclination and the left inclination are from the back of the glue binding end to the fore edge. This is for cutting, for example, cutting the top portion with a right inclination and cutting the ground portion with a left inclination.

  This is done by cutting the back part (glue binding part) with the largest load by cutting from the glued back part to the opposite edge part, and cutting the edge part with a relatively light load on the side part of the blade. This is to receive a friction load on the end face of the finished sheet. In this way, the cutting blade 65x is inclined toward the cutting direction and gradually cuts, thereby minimizing the cutting load and reducing the size and weight of the apparatus. The right cams C1a and C1b and the left cams C2a and C2b cause the cutting blades 65x to incline in opposite directions, but the inclination angle with respect to the sheet is the same as the left and right, and this shearing angle is suitable for experiments such as 30 degrees The angle is set.

  FIG. 6A shows a case where the top of the sheet bundle is cut, and the sheet bundle conveyed with its back portion down to the processing path 33 is rotated by 90 degrees by the bundle posture deflecting means 64 (clockwise rotation in the illustrated case). To do. Then, it is sent to the cutting position G so that the back binding portion is on the left side and the fore edge portion is on the right side in the state of FIG. Therefore, the cutting blade 65x is cut in the y direction (thickness direction) while sliding in the illustrated arrow x direction (paper surface direction). As a result, the sheet bundle is gradually cut from the back to the fore edge, and finally the lowermost layer paper at the fore edge is cut off.

  Next, the sheet bundle whose top is cut is rotated in the direction of the arrow (clockwise) in the figure. Then, the sheet bundle is rotated in the direction away from the cutting line first from the cutting start end (back binding portion), and the cutting end end is rotated last. At this time, even if there is a connection that causes a cutting failure in the final cutting portion of the sheet bundle, it is cut along the cutting line.

  Next, FIG. 5B shows a case where the ground portion is cut. The sheet bundle is rotated 180 degrees and fed so that the ground portion faces the cutting position G. In this state, the back binding portion is located on the right side of the drawing and the fore edge portion is located on the left side of the drawing, and cutting is performed while sliding the cutting blade 65x from the back portion toward the fore edge. As a result, the paper is gradually cut from the back toward the fore edge, and finally the lowermost layer paper on the fore edge side is cut. Therefore, the sheet bundle is rotated in the arrow direction (counterclockwise direction). As a result, even if the lowermost layer paper at the edge of the edge is connected by incomplete cutting, the sheet bundle is cut along the cutting line by rotation of the sheet bundle.

  FIG. 5C shows a case where the fore edge is cut. The sheet bundle is rotated 90 degrees so that the fore edge faces the cutting blade 65x. Therefore, after the fore edge is cut with the cutting blade 65x and the cutting is completed, the cutting start end side first rotates in a direction away from the cutting line. In the case of illustration, it rotates in the clockwise direction (arrow direction). As described above, after the cutting is completed, the cutting start end of the sheet bundle is first rotated in the direction away from the cutting line, so that the sheet is cut along the cutting line even if the cutting end ends are connected by incomplete cutting.

  As described above, the present invention is characterized in that the flat blade cutter (cutting blade) 65x having a flat plate shape is cut while sliding along the cutting line XX from one end of the sheet bundle to the other end. At this time, the cutting edge of the cutting blade 65x may be inclined, or may be configured on the same horizontal plane as the plane of the sheet bundle.

  In the present invention, the case where the cutting blade 65x is inclined and cut from the cutting start end toward the cutting end end side is shown. However, the cutting edge of the cutting teeth is not inclined and is flush with the paper surface of the sheet bundle. You may move so that it may slide to the other end.

[Configuration of control means]
Next, the configuration of the control means in the above-described apparatus will be described with reference to FIG. This figure is a control block diagram. In a system in which the image forming apparatus A and the bookbinding apparatus B are connected as shown in FIG. 1, for example, the control CPU 70 provided in the image forming apparatus A has a control panel 71 and mode setting means. 72 is provided. A control CPU 75 is provided in the control unit of the bookbinding apparatus B, and the control CPU 75 calls a bookbinding process execution program from the ROM 76 and executes each process in the bookbinding path 33.

Further, the control CPU 75 receives a post-processing mode instruction signal, a job end signal, sheet size information, and other information required for bookbinding and a command signal from the control CPU 70 of the image forming apparatus A. On the other hand, in the carry-in path 31, the bookbinding path 33, and the cover transport path 34, sheet sensors Se1 to Se6 that detect the transported sheet (sheet bundle) are arranged at the positions illustrated in FIG. Therefore, the detection signal of each of the sheet sensors Se1 to Se6 is transmitted to the control CPU 75, and the control CPU 75 performs “stacking unit control unit 75a” “adhesive application unit control unit 75b” “cover cover binding unit control unit 75c” “cutting unit control unit”. 75d "," stack controller 75e "and" adhesive temperature controller 79 ".

  Therefore, the cutting means control section (control means; the same applies to the following) 75d includes a turntable control section 77 and a cutter motor control section 78, and the turntable control section 77 includes the unit lifting / lowering motor Ma of the turntable unit described above and a turn. The motors Mt1 and Mt2 and the grip motor Mg are connected to the respective driver circuits so as to control them. Further, the cutter motor control section 78 is connected to each driver circuit so as to control a cutter motor Mc that operates the cutting blade 65x and a drive motor (not shown) of the cutting edge press means 65b. The cutter motor controller 78 is configured to receive detection signals from a position sensor (not shown) of the cutting blade 65x and a grip position detection sensor (not shown) of the cutting edge press means 65b.

  Therefore, the turntable control unit 77 detects the sheet bundle (bookbinding sheet bundle) sent from the upstream folding roll 63 by the sensor Se4, and after the expected time when the leading edge of the sheet bundle has landed on the cutting blade 65x, The grip motor Mg is actuated to grip the sheet bundle, and a control configuration is provided to rotate the turning motors Mt1 and Mt2 by the grip end signal. At the same time, the turntable control unit 77 is configured to control the lifting motor Ma so that the sheet bundle gripped by the turntables 64a and 64b is moved forward and backward toward the cutting position G.

  The cutter motor control unit 78 detects the sheet bundle sent to the cutting line XX with a sensor (not shown), and controls the driving motor of the cutting edge press means 65b with the detection signal to fix the sheet bundle at the cutting position. Thereafter, the cutter motor Mc is operated.

[Execute sweep operation]
The rotation operation of the above-described sheet bundle will be described. At the cutting position G of the sheet bundle, waste paper pieces may adhere to the blade receiving surface 66x, and at the same time, the waste paper pieces may be connected to the sheet bundle by incomplete cutting. If this is scraped off by a conventional sweep mechanism, the sheet surface of the sheet bundle may be torn off, resulting in bookbinding failure.

  Therefore, the present invention removes the waste paper pieces adhering to the blade receiving surface 66x and remaining at the cutting position G, and when the waste paper pieces are connected to the sheet bundle in an incompletely cut state, the separation operation is performed by rotating the sheet bundle. It is characterized by being performed in That is, it is characterized by removing the adhered paper piece that transports the cut sheet bundle to the cutting position G and cutting the incompletely cut sheet along a preset cutting line XX.

  Therefore, the turntable control unit 77 controls the turning motors Mt1 and Mt2 of the turntables 64a and 64b so that the leading edge of the sheet bundle rotates along the blade receiving surface 66x when the sheet bundle is transferred to the cutting position G. To do. That is, the sheet bundle is transferred toward the cutting position G, and the lower end edge of the sheet bundle is cut by a predetermined amount. After the cutting process, the turntables 64a and 64b are rotated to rotate the sheet bundle by a predetermined angle. At this time, the rotation direction of the sheet bundle is rotated in the direction away from the cutting line first from the cutting start end side. Then, even if it is connected to the end of cutting in an incompletely cut state, this end is pulled away along the cutting line.

33 Bookbinding path 64 Bundle attitude deflection means 64a Turntable (fixed)
64b Turntable (movable)
64x unit frame 65 cutting means 65x cutting blade 66 blade receiving member 66x blade receiving surface 69 waste box Mc cutter motor G cutting position Mt1 turning motor Mt2 turning motor

Claims (7)

An apparatus for cutting at least one side of a bound sheet bundle,
A processing path for guiding the sheet bundle to a predetermined cutting position;
A flat blade-shaped cutting blade arranged at the cutting position;
A blade receiving member disposed at a position facing the cutting blade via the processing path;
A bundle posture deflecting means for deflecting the posture of the sheet bundle disposed on the upstream side of the cutting position to be cut;
A waste box for storing a cutting paper piece arranged on the downstream side of the cutting position;
A cutting blade driving means that reciprocates between a cutting position where the cutting blade comes into contact with the blade receiving member and a standby position separated from the cutting position;
Cutting control means for controlling the cutting blade driving means and the bundle posture deflection means;
With
The bundle posture deflecting unit is configured to rotate the sheet bundle in a selected direction in either forward or reverse direction so that a predetermined edge faces the cutting position.
The cutting blade is configured to cut while sliding along a predetermined cutting line from one end of the sheet bundle to the other end,
The cutting control means includes:
After cutting the edge of the sheet bundle set in advance by controlling the cutting blade driving means along the cutting line from one end to the other end,
A cutting apparatus characterized by controlling the bundle posture deflecting means to deflect the posture of the sheet bundle in a rotation angle direction in which the cutting start end side of the sheet bundle is first and the cutting end end side is later away from the cutting line. The processing path is arranged to transfer the sheet bundle from the upstream side to the downstream side in the vertical direction,
The cutting apparatus according to claim 1, wherein the bundle posture deflecting unit is configured to be capable of turning while holding the sheet bundle in a vertical direction. The cutting blade driving means is
2. The cutting apparatus according to claim 1, wherein the cutting blade is configured to cut the cutting blade while sliding in the direction of the other end edge from the back binding edge of the sheet bundle. The cutting blade driving means is
A drive motor;
Guide means for guiding the cutting blade to move along the cutting line;
Transmission means for moving the cutting blade along the guide means;
Consists of
The cutting device according to claim 3, wherein the transmission means is configured to move the cutting blade along the guide means so as to be selectable in one of the left and right directions. The bundle posture deflection means includes:
The sheet bundle sent in a posture toward the cutting position from the back part through the processing path is rotated by a predetermined angle to cut the top and bottom part, and then the small edge part is cut and transferred to the downstream side of the cutting position. Item 5. The cutting device according to any one of Items 1 to 4. An adhesive application means for applying an adhesive to the back-binding end face of the sheet bundle that is partly integrated in a bundle;
Cover binding means for attaching a cover sheet bundle to the sheet bundle from the adhesive application means,
A cutting device that cuts and aligns the three directions of the bound sheet bundle from the cover binding means,
The bookbinding apparatus, wherein the cutting apparatus includes the cutting apparatus according to any one of claims 1 to 5. An image forming apparatus that sequentially forms images on a sheet bundle;
A stacking unit that stacks and stacks the sheet bundle sent from the image forming apparatus;
An adhesive application means for applying an adhesive to the back binding end surface of the sheet bundle from the stacking means;
Cover binding means for attaching a cover sheet bundle to the sheet bundle from the adhesive application means,
A cutting device that cuts and aligns the three directions of the bound sheet bundle from the cover binding means,
A cutting device that cuts and aligns the three directions of the bundle of sheets bound together by the bookbinding device;
Consisting of
The image forming system according to claim 1, wherein the cutting device is the cutting device according to claim 1.

Images