JP5130020B2 - Sheet bundle cutting apparatus and bookbinding apparatus - Google Patents

Description

  The present invention relates to a sheet bundle cutting apparatus and a bookbinding apparatus, and more particularly to a sheet bundle cutting apparatus for cutting an edge of a sheet bundle and a bookbinding apparatus provided with the sheet bundle cutting apparatus.

  In general, a sheet bundle cutting apparatus holds a sheet bundle that is arranged in a bundle on a paper platform such as a table with a pressing member and cuts the sheet bundle with a cutting blade. For cutting a sheet bundle, for example, a trimming cut that cuts and aligns three sides of a bound sheet bundle or a mode in which a predetermined portion of a sheet bundle is cut and separated into 1/2, 1/3, and the like are known. ing. Further, as the cutting blade, a flat blade-shaped plate blade having a length corresponding to the sheet width and a disk-shaped disk blade are known.

  In addition, when a sheet bundle is fixed on a paper table and cut with a cutting blade, a fixed blade is provided opposite to the cutting blade, and a cutting mechanism that causes the two cutting edges to act in a scissor shape, and a position facing the cutting blade A cutting mechanism that arranges a mana plate-like blade receiving member is known. In the case of the former cutting mechanism provided with scissors-like fixed blades, it is difficult to ensure proper cutting unless the cutting blade and the fixed blade are in close contact with each other. For this reason, a mechanism for providing the latter mana plate-like blade receiving member is frequently used in the sheet bundle cutting mechanism.

  As a mana plate-like blade receiving mechanism, a structure is disclosed in which a sheet is supported on a resin paper mount and the sheet is cut with a flat blade-like cutting blade (see, for example, Patent Document 1). In this mechanism, a concave groove is formed along a cutting line where the cutting blade contacts the paper table, and a blade receiving member such as urethane rubber is embedded in the concave groove. The blade receiving member is made of a soft material such as a rubber material or a resin material so that the cutting blade is not worn.

  A grip mechanism that supports a sheet bundle in a vertical posture and a cutting blade (mechanism) that cuts and aligns the sheet bundle supported thereby are also known (see, for example, Patent Document 2). In this mechanism, a blade receiving body made of a soft material such as wood, light rubber, or synthetic resin is disposed as a blade receiving member of the cutting blade. In any of the devices disclosed in these patent documents, the blade receiving member has a flat blade receiving surface in the longitudinal direction of the cutting blade.

Japanese Patent Laid-Open No. 10-119000 (FIG. 1) Japanese Patent Laying-Open No. 2002-127637 (FIG. 8)

  However, in the conventional apparatus, among the sheets constituting the sheet bundle, the sheet that is finally cut by the cutting blade is less likely to be cut than the other sheets (the sheet at a position far from the cutting blade is not completely cut). There was a problem that. On the other hand, in order to eliminate this problem, if the cutting blades are driven strongly, and the sheets constituting the sheet bundle are completely cut, the cutting blades will collide strongly against the blade receiving member during cutting. Therefore, the durability of the cutting blade is reduced. Therefore, when such a configuration is adopted, the number of replacements of the cutting blade is increased due to a decrease in durability, resulting in a decrease in operating efficiency of the apparatus.

  An object of the present invention is to provide a sheet bundle cutting apparatus capable of completely cutting a sheet bundle without reducing the durability of the cutting blade, and a bookbinding apparatus including the sheet bundle cutting apparatus.

In order to solve the above-mentioned problem, a first aspect of the present invention is a sheet bundle cutting device, which is a positioning unit that positions a sheet bundle at a predetermined cutting position, and is disposed at the cutting position, A cutting blade that cuts the edge of the positioned sheet bundle, a blade receiving member that is disposed opposite to the cutting blade across the sheet bundle, and a pressing unit that presses the sheet bundle toward the blade receiving member. A buffer member interposed between the blade receiving member and the sheet bundle and receiving a cutting edge of the cutting blade that cuts the sheet bundle, and a drive for reciprocating the cutting blade between a standby position and a cutting position And the pressing means has at least one recessed groove provided along the longitudinal direction of the cutting blade at a position corresponding to the back edge of the sheet bundle . In the first aspect, the sheet bundle is positioned at a predetermined cutting position by the positioning means, and the pressing has at least one recessed groove provided along the longitudinal direction of the cutting blade at a position corresponding to the back edge of the sheet bundle. The sheet bundle is pressed by the means toward the blade receiving member disposed opposite to the cutting blade with the sheet bundle interposed therebetween, and the driving means moves the cutting blade disposed at the cutting position and positioned at the standby position to the cutting position. Thus, the edge of the sheet bundle is cut with a cutting blade. A buffer member is interposed between the blade receiving member and the sheet bundle. When the sheet bundle is cut by the cutting blade, the buffer member receives the cutting edge of the cutting blade that cuts the sheet bundle. According to this aspect, among the sheets constituting the sheet bundle, since the buffer member is located at a position farther from the sheet farthest from the cutting blade, the object that is difficult to cut becomes the buffer member, and the sheet All the sheets constituting the bundle are surely cut, and after the sheet bundle is cut, the cutting blade does not directly collide with the blade receiving member, so that the durability of the cutting blade can be improved.

In order to solve the above-mentioned problem, a second aspect of the present invention is a sheet bundle cutting apparatus, wherein the sheet bundle is positioned at a predetermined cutting position, and is disposed at the cutting position. A cutting blade that cuts the edge of the positioned sheet bundle, a blade receiving member that is disposed opposite to the cutting blade across the sheet bundle, and a pressing unit that presses the sheet bundle toward the blade receiving member. A buffer member interposed between the blade receiving member and the sheet bundle and receiving a cutting edge of the cutting blade that cuts the sheet bundle, and a drive for reciprocating the cutting blade between a standby position and a cutting position Means, a moving means for moving the buffer member along the blade receiving member, and a gripping means for gripping the sheet bundle. The gripping means grips the sheet bundle and releases the pressure by the pressing means. State In, wherein the moving the cushioning member by said moving means. Also in the second aspect, the same effect as in the first aspect can be obtained.

In a second aspect, the pressing means, it is not preferable to have at least one concave groove provided along the longitudinal direction of the cutting blade at the position corresponding to the back edge of the sheet bundle. At this time, or in the first aspect, a shift unit that moves the pressing unit in the longitudinal direction of the cutting blade is provided, and the shift unit is configured such that the back edge of the sheet bundle positioned by the positioning unit is positioned in the recessed groove. More preferably, the pressing means is moved.

In the first aspect, the buffer member may be moved along the blade receiving member. In this case, or in the second aspect, the buffer member is composed of a sheet-like member, and the moving means is composed of a winding unit that winds up the buffer member and a holding unit that holds the other end of the buffer member. The cutting blade preferably cuts the edge of the sheet bundle at a position closer to the winding unit than the holding unit. It is more preferable that a gripping unit for gripping the sheet bundle is provided, and the buffer member is moved by the moving unit in a state where the sheet bundle is gripped by the gripping unit and the pressing by the pressing unit is released .

Further, in the first and second aspects, the positioning means is configured to be capable of adjusting the edge position of the back portion of the sheet bundle in the longitudinal direction of the cutting blade when positioning the sheet bundle at the cutting position. May be. In this case, the positioning means includes a grip rotating unit that grips and swivels the sheet bundle, and a control unit that controls gripping and swiveling operation of the grip rotating unit. The control unit grips the sheet bundle. Then, the grip rotating part is rotated so that the sheet bundle is pivoted to be positioned at the cutting position, and the back edge of the sheet bundle is positioned at a predetermined position of the blade receiving member by adjusting the position for gripping the sheet bundle. May be controlled. At this time, it is preferable that the control unit controls the pivoting operation of the grip rotating unit so that the sheet bundle is pivoted to position the top part, the fore edge part, and the ground part at the cutting positions.

In order to solve the above-described problem, a third aspect of the present invention is a bookbinding apparatus, comprising: a binding device that binds back portions of a sheet bundle; and a peripheral edge of the sheet bundle that is bound by the bookbinding device. A sheet bundle cutting device for cutting, wherein the sheet bundle cutting device has the configuration of the first or second aspect. According to this aspect, in addition to the effect of the sheet bundle cutting device according to the first or second aspect, all sheets constituting the sheet bundle are surely cut, so that a bookbinding with a good appearance can be created. Thus, it is possible to prevent a decrease in yield during bookbinding.

  According to the present invention, among the sheets constituting the sheet bundle, since the buffer member is located at a position farther from the sheet farthest from the cutting blade, the object that is difficult to cut becomes the buffer member. All the sheets constituting the bundle are surely cut, and after cutting the sheet bundle, the cutting blade does not directly collide with the blade receiving member, so that the durability of the cutting blade can be improved. An effect can be obtained.

  Hereinafter, an embodiment in which the present invention is applied to an image forming system will be described with reference to the drawings.

(Constitution)
As shown in FIG. 1, the image forming system according to the present exemplary embodiment forms an image forming apparatus A that sequentially forms images on a sheet, and a bundle of sheets on which images are formed connected to a paper discharge port of the image forming apparatus A. After bookbinding and binding, the bookbinding apparatus B that cuts the edge of the bookbinding sheet bundle, and post-processing such as stapling on the sheet that is arranged on the downstream side of the bookbinding apparatus B and image-formed by the image forming apparatus A And a post-processing apparatus C for performing the above.

<Image forming apparatus>
The image forming apparatus A can employ various structures such as a copying machine, a printer, and a printing machine. FIG. 1 illustrates an electrostatic printing apparatus. The image forming apparatus A includes a paper feeding unit 2, a printing unit 3, a paper discharge unit 4, and a control unit 70 (see FIG. 8) in the 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 70 is fed out to the sheet feeding path 6. A registration roller 7 is provided in the paper feed path 6, and the sheet is fed to the downstream printing unit 3 at a predetermined timing after the leading edge of the sheet is 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. The developer 11 attaches toner ink to the latent image, and the transfer charger 12 prints the sheet. (Image formation). The print sheet is fixed by the fixing device 13 and carried out to the paper discharge path 17. A paper discharge port 14 and a paper discharge roller 15 formed in the casing 1 are disposed in the paper discharge unit 4. When an image is also formed on the back side of the print sheet, the print sheet from the paper discharge path 17 is turned upside down by a switchback, and then the paper feed path 6 having the registration rollers 7 again via the circulation path 16. To form an image. The print sheet having an image formed on one side or both sides in this way is discharged from the paper discharge port 14 by the paper discharge roller 15.

  The image forming apparatus A also has a scanner unit 20 that optically reads a document image to be printed by the print head 9 from the document at the top of the printing unit 3, and a document to be read by the scanner unit 20 at the top of the scanner unit 20. A document feeding device 25 that transports the scanner unit 20 is provided. The scanner unit 20 includes a platen 23 for placing a document, a carriage 21 that scans the document along the platen 23, and an optical reading unit 22 that includes a CCD that photoelectrically converts an optical image from the carriage 21. ing. The document feeder 25 is mounted on the platen 23.

  Further, as shown in FIG. 8, the image forming apparatus A includes a control panel 71 for an operator to give an operation instruction to the apparatus and display an operation state, and a control unit 70 for controlling the entire apparatus. Yes. The control unit 70 is a CPU, ROM, RAM, an internal communication unit for communicating with the paper feeding unit 2 and the image forming unit 20, and an external unit for communicating with peripheral devices such as the bookbinding apparatus B and the post-processing apparatus C. The communication unit is configured to include an interface that allows connection with an external computer. Therefore, in addition to inputting an operation instruction from the control panel 71, the operator can perform an operation instruction from an external computer. The control panel 71 is connected to the control unit 70, and the control unit 70 performs various modes (for example, a duplex printing mode by the image forming apparatus A, a bookbinding mode by the bookbinding apparatus B, and a post-processing apparatus C according to an operation instruction. Staple mode) is set, and various information is provided to the bookbinding apparatus B and the post-processing apparatus C as necessary.

<Bookbinding device>
As shown in FIG. 2, the bookbinding apparatus B includes a stacking unit 40 for stacking and aligning printed sheets in a bundle in a casing 30, and an adhesive for applying adhesive glue to the back of the sheet bundle from the stacking unit 40. A grip transport unit 47 for transferring a sheet bundle from the application unit 55 and the stacking unit 40 to a predetermined adhesive application position of the adhesive application unit 55; a cover binding unit 60 for binding the cover sheet to the sheet bundle to which the adhesive is applied; A bundle posture deflecting unit 64 for positioning a sheet bundle (hereinafter, in addition to a sheet bundle in which adhesive glue is applied to the back of the sheet bundle, a sheet bundle bound to a display sheet is also referred to as a sheet bundle) at a predetermined cutting position; A cutting unit 65 that cuts an edge (periphery) of the sheet bundle positioned by the bundle posture deflecting unit 64, a sheet bundle that has been cut by the cutting unit 65 at a predetermined discharge position, a bundle discharge unit, and an apparatus of the bookbinding apparatus B Overall control Cormorant and a control unit 75 (see FIG. 8).

[Transport route]
The conveyance path of each sheet constituting the sheet bundle will be described. In the casing 30, a carry-in path 31 having a carry-in port 31a connected to the paper discharge port 14 (see FIG. 1) of the image forming apparatus A is provided. An intermediate sheet conveyance path 32 and a cover sheet conveyance path 34 are connected to the path 31 via a path switching flapper 36. A bookbinding path 33 is connected to the intermediate paper transport path 32 via the stacking unit 40, and a post-processing path 38 (see FIG. 1) provided in the post-processing apparatus C is connected to the cover transport path 34. ing. 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), and a cover binding section 60 is disposed at the intersection. As described above, the carry-in path 31 is continuous with the paper discharge port 14 of the image forming apparatus A, and receives the sheet discharged from the image forming apparatus A. In this case, from the image forming apparatus A, a print sheet (intermediate paper sheet) S1 on which content information is printed (including a sheet on which content information is not printed if necessary), a title used as a cover cover, and the like. Is printed out (hereinafter referred to as a cover sheet) Sh. 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 sheets are distributed and conveyed to the respective paths via the path switching flapper 36.

  As shown in FIG. 1, an inserter device 26 is connected to the carry-in route 31 to separate cover sheets that are not subjected to printing processing by the image forming apparatus A one by one from the paper feed tray 26 a and supply them to the carry-in route 31. The inserter device 26 is disposed on one or a plurality of stages of paper feed trays 26a and one side (base side) of the paper feed tray 26a, and separates and feeds the sheets stacked on the paper feed tray 26a one by one. And a paper feed path 27 provided on the downstream side of the paper feed unit. The paper feed path 27 is connected to the carry-in path 31 via a path switching piece 28.

  Further, as shown in FIG. 2, the transport roller 31 b is provided in the carry-in route 31, the transport roller 32 a is provided in the intermediate paper transport route 32, and the grip transport unit 47, the bundle posture deflecting unit 64, and the cutting are described in the bookbinding route 33. A portion 65, a bundle discharge portion, and the like are provided. Further, a transport roller 34a is disposed in the cover transport path 34, and a transport roller 38a (see FIG. 1) is disposed in the post-processing path 38, and each is coupled to a drive motor.

[Accumulator]
The stacking unit 40 includes a stacking tray 41 that is obliquely disposed and is disposed below the sheet discharge port 32 b of the intermediate sheet transport path 32. The stacking tray 41 stacks the print sheets discharged from the paper discharge port 32b in a bundle. Above the stacking tray 41, a carry-in guide 42b for guiding the print sheet discharged from the discharge port 32b onto the stacking tray 41 and a forward / reverse roller 42a are provided. The forward / reverse roller 42a transfers the print sheet to the front end side (left side in FIG. 2) of the stacking tray 41 by forward rotation by the motor M1, and reversely rotates the sheet to the regulating member 43 disposed at the rear end (right end in FIG. 2). The rear end is abutted and regulated. Further, the stacking tray 41 is provided with a sheet side aligning portion (not shown) that aligns both side edges of the printed sheets stacked on the tray with a reference position. Accordingly, the printing sheets from the intermediate paper conveyance path 32 are sequentially stacked on the stacking tray 41 and are 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. In the configuration, for example, a paper touching piece in contact with the uppermost sheet is provided on the tray, and the thickness of the sheet bundle is identified by detecting the position of the paper touching piece with a sensor, or the stacking tray from the paper discharge sensor Se3. By providing a counter for detecting the number of sheets discharged above and counting the signal from this sensor, the total number of sheets counted by the job end signal from the image forming apparatus A is multiplied by the average paper thickness. For example, the thickness of the sheet bundle can be identified.

[Grip transport section]
The bookbinding path 33 is provided with a grip conveyance unit 47 that transfers the sheet bundle from the stacking tray 41 to the adhesive application position E on the downstream side. The grip conveyance unit 47 deflects the sheet bundle accumulated on the accumulation tray 41 from the inclined posture to the vertical posture, and sets the sheet bundle at the adhesive application position E along the bookbinding path 33. Therefore, the stacking tray 41 is driven by the motor M2 and has a rack and pinion structure, and moves from the stacking position shown by the solid line in FIG. 2 to the transfer position D shown by the broken line in FIG. The sheet bundle is delivered to the conveyance unit 47.

[Adhesive application part]
An adhesive application unit 55 is disposed at an adhesive application position E on the downstream side of the bookbinding path 33 where the grip conveyance unit 47 is disposed. As shown in FIG. 3 (a), the adhesive application unit 55 rotates the adhesive container 56 that stores the hot-melt adhesive, the application roll 57 that applies adhesive to the back end face of the sheet bundle, and the application roll. And a roll rotation motor MR.

  The application roll 57 is made of a heat-resistant porous material, and is configured so as to impregnate the paste and swell the paste layer around the roll. The glue container 56 is divided into a liquid adhesive storage chamber (hereinafter referred to as a liquid agent storage chamber) 56a and a solid adhesive storage chamber (hereinafter referred to as a solid agent storage chamber) 56b. A coating roll 57 is rotatably incorporated. A paste sensor 56S for detecting the remaining amount of adhesive is disposed in the liquid agent storage chamber 56a. The glue sensor 56S also serves as a temperature sensor for the adhesive, and detects the temperature of the liquefied adhesive in the liquid agent storage chamber 56a and detects the remaining amount of the adhesive based on the temperature difference of the part immersed in the adhesive. Further, a heating unit 50 such as an electric heater is embedded in the bottom of the paste container 56. The paste sensor 56S and the heating unit 50 are connected to the control unit 75 (see FIG. 8) via a driver circuit including an A / D converter, a D / A converter, and an FET and a resistor, and the liquid agent storage chamber 56a The temperature of the adhesive is adjusted to a predetermined melting temperature.

  The glue container 56 is driven to reciprocate along the sheet bundle. As shown in FIG. 3B, the glue container 56 is formed in a short length (dimension) with respect to the lower end edge (back cover part at the time of bookbinding) SU of the sheet bundle, and an application roll 57 incorporated therein At the same time, it is supported by the guide rail 52 of the apparatus frame so as to move along the lower edge SU of the sheet bundle. The glue container 56 is connected to a timing belt 53 attached to the apparatus frame, and a driving motor MS is connected to the timing belt 53.

  The glue container 56 is reciprocated by the drive motor MS between the home position HP and the return position RP that starts the backward movement along the sheet bundle. The home position HP of the glue container 56 is detected by the home position sensor SP, and the return position RP is set by the sheet width size information. The glue container 56 is positioned at the home position HP when the apparatus power is turned on (initialization), and after a predetermined time from the sheet grip signal of the grip sensor Sg provided in the preceding, for example, the grip transport section 47 (the sheet bundle is in the position where the adhesive is applied) (Estimated time to reach E) from the home position HP toward the return position RP. Simultaneously with this movement, the application roll 57 starts to rotate by the roll rotation motor MR. With the rotation of the drive motor MS, the glue container 56 starts to move from the left side to the right side in FIG. In this outward path, the application roll 57 is pressed against the sheet bundle to disperse the sheet end, and in the return path from the return position RP to the home position HP, a predetermined gap is formed with the sheet end to apply the adhesive. The feed amount of the grip transport section 47 is adjusted by a lifting motor (not shown).

[Cover binding]
A cover binding portion 60 is disposed at the cover binding position F (see FIG. 2) of the bookbinding path 33. As shown in FIG. 4, the cover binding portion 60 includes a back plate 61, a back folding plate 62, and a folding roll 63. The cover binding position F is located in the cover transport path 34 and the cover sheet is fed from the image forming apparatus A or the inserter apparatus 26. The back plate 61 is formed of a plate-like member that backs up the cover sheet, and is disposed in the bookbinding path 33 so as to be able to advance and retreat. The (sheet) sheet bundle S2 is joined to the cover sheet Sh supported by the back plate 61 in an inverted T shape. The back folding plate 62 is composed of a pair of left and right press members, and is configured to approach and separate from each other by a drive unit (not shown) in order to back-fold the back part of the cover sheet joined in an inverted T shape. Yes. The folding roll 63 is composed of a pair of rollers that clamp and finish the back-folded sheet bundle.

  Further, a pair of movable guides 34g are arranged on the left and right of the cover binding position F in the cover transport path 34, and guides the upstream side and the downstream side of the cover sheet Sh fed to the cover binding position F, respectively. 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.

[Bundle posture deflection unit]
On the downstream side of the folding roll 63 in the bookbinding path 33, a bundle posture deflecting unit 64 that positions and sets the sheet bundle at the cutting position G and deflects the vertical direction of the sheet bundle is disposed. The bundle posture deflecting unit 64 deflects the sheet bundle mounted at the cover binding position F to a predetermined posture and positions the sheet bundle at the cutting position G on the downstream side.

For this reason, the bundle posture deflecting unit 64 grips (grips) the sheet bundle sent from the folding roll 63.
Grip rotating members 64a and 64b to be rotated. The grip rotation members 64a and 64b are provided on a unit frame 64x attached to the apparatus frame so as to be movable up and down. Grip rotating members 64 a and 64 b are rotatably supported by the unit frame 64 x with the bookbinding path 33 interposed therebetween, and one movable grip rotating member 64 b is in the sheet bundle thickness direction (a direction orthogonal to the bookbinding path 33). It is supported movably. Each of the grip rotation members 64a and 64b is provided with turning motors Mt1 and Mt2 so as to deflect the posture of the sheet bundle in the bookbinding path 33. The movable grip rotation member 64b is equipped with a grip motor Mg that moves in the left-right direction in FIG.

  Accordingly, the sheet bundle guided into the bookbinding path 33 is gripped by the left and right grip rotating members 64a and 64b, and the posture direction of the sheet bundle is deflected by the turning motors Mt1 and Mt2. For example, the sheet bundle having the back portion carried downward is turned 180 degrees and the small edge portion is sent downward to the downstream discharge roller 67. Further, a trimming cut that rotates the sheet bundle by 90 degrees sequentially and deflects the top portion, the ground portion, and the fore edge portion (see FIG. 10) downward at the cutting position G on the downstream side, and cuts the peripheral direction of the sheet bundle. Is possible. The movable grip rotating member 64b is provided with a grip sensor (not shown) to detect that the sheet bundle is securely gripped between the left and right grip rotating members 64a and 64b, and the grip after this detection. The rotary members 64a and 64b are configured to rotate. The unit frame 64x is configured such that the sheet bundle can be moved up and down along the bookbinding path 33 by a lifting motor Ma. This is because the sheet bundle is conveyed and set at the cutting position G and the cutting width (cut amount) at the cutting position G is set by the feed amount when trimming and dividing and cutting the periphery of the sheet bundle.

[Cutting section]
A cutting unit 65 that cuts the peripheral edge of the sheet bundle is disposed on the downstream side of the bundle posture deflection unit 64. The cutting unit 65 is disposed at the cutting position G, and includes a cutting blade unit 65a having a flat blade-shaped cutting blade 65x that cuts the edge of the sheet bundle positioned by the bundle posture deflection unit 64, and a sheet bundle (bookbinding path 33). A blade receiving member 65c disposed opposite to the cutting blade 65x, a cutting edge press member 65b for pressing and supporting the cutting edge of the sheet bundle toward the blade receiving member 65c, and the blade receiving member 65c and the sheet bundle (bookbinding path) 33) and a film-like (sheet-like) cushioning member 66 that receives the cutting edge of the cutting blade 65x that cuts the sheet bundle. With the cutting unit 65 having such a configuration, a predetermined amount of the peripheral edge except the back part of the sheet bundle (mounted) is cut and aligned.

[Cutting edge press member]
The cutting edge press member 65b is configured by a press mechanism that presses and holds the cutting edge of the sheet bundle against the blade receiving member 65c, and applies an urging force to the cutting edge press member 65b and the cutting edge press member 65b described above. It has a member (not shown). The urging member includes a spring that urges the cutting edge press member 65b in a direction orthogonal to the sheet bundle by a solenoid (not shown). In addition, a shift mechanism 65S that moves the cutting edge press member 65b in the longitudinal direction of the cutting blade 65x in accordance with the sheet size constituting the sheet bundle is disposed above the cutting edge press member 65b. The shift mechanism 65S includes a rack 65r fixed to the cutting edge press member 65b, a pinion 65p meshed with the rank 65r, and a stepping motor Mo with a reduction gear that rotates the pinion 65p.

[Cutting blade unit]
The cutting blade 65x is driven by a cutter motor Mc (stepping motor) that reciprocates the cutting blade 65x between a standby position and a cutting position. The cutting blade 65x and the cutter motor Mc are unitized to form a cutting blade unit 65a. As shown in FIG. 5, the cutting blade 65x is a flat blade-shaped cutting edge and is configured with a blade width L0 longer than the sheet width L, and a standby position (see FIG. 6 (a)) spaced from the blade receiving member 65c by a distance d. The cutter motor is supported between the blade receiving member 65c and the sheet bundle so as to reciprocate between a cutting position (see FIG. 6B) that contacts the blade receiving member 65c via the buffer member 66. It is connected to Mc. In FIG. 5, the buffer member 66 is omitted.

[Blade receiving member]
The blade receiving member 65c is fixed to the apparatus frame, and as shown in FIG. 6A, a sheet central receiving surface 65ca that supports the central portion of the sheet (bundle) and a blade receiving surface that receives the cutting edge of the cutting blade 65x. 65cb and a cutting edge receiving surface 65cc. Each receiving surface is configured to be continuous with each other to form the same plane. The sheet center receiving surface 65ca positioned above the cutting line XX and the cutting edge receiving surface 65cc positioned below the cutting line XX are made of a conductive material, and the buffer member 66 is cut along the cutting line XX. The blade receiving surface 65cb that receives the cutting edge of the cutting blade 65x via the blade is made of a non-conductive material.

  The material of the blade receiving member 65c is selected as follows. First, an optimum material for the cutting blade 65x is selected as the blade receiving surface 65cb. The blade receiving surface 65cb has a hardness that does not damage the cutting edge of the cutting blade 65x that abuts through the buffer member 66 when the sheet bundle is cut, and at the same time, when the cutting blade 65x abuts and cuts, a piece of paper (chip) or a buffer member It is preferable to select a material having elasticity that does not bite 66, and is made of, for example, non-conductive polypropylene resin (PP).

  On the other hand, materials having appropriate rigidity and conductivity are selected for the sheet center receiving surface 65ca and the cutting edge receiving surface 65cc. The sheet center receiving surface 65ca, the cutting edge receiving surface 65cc, and the blade receiving surface 65cb may be configured by different members, respectively, but can be manufactured at a low cost if manufactured by the same molding using the same material.

  In the illustrated example, a plate-like member is formed by two-color molding of synthetic resin, and a non-conductive material is selected for the blade receiving surface 65cb, and a conductive material is selected for the sheet center receiving surface 65ca and the cutting edge receiving surface 65cc. ing. That is, for example, the blade receiving member 65c is formed by molding a synthetic resin material such as PP. At this time, a two-color molding method is used in which conductive powder such as tin is mixed into the sheet center receiving surface 65ca and the cutting edge receiving surface 65cc. Then, the blade receiving member 65c formed on one plate-like member has a blade receiving surface 65cb made of only polypropylene resin, and the sheet center receiving surface 65ca and the cutting edge receiving surface 65cc are mixed with metal powder such as tin. It becomes conductive. This conductive powder is mixed to such an extent that it has electrical conductivity (so that the conductive powder is chained). The sheet center receiving surface 65ca and the cutting edge receiving surface 65cc are grounded.

[Concave groove]
As described above, the back edge of the sheet bundle bulges out due to the case binding on the cover sheet Sh. For this reason, as shown in FIG. 5, the cutting edge press member 65b is formed with a recessed groove 65y at a position for supporting the back binding edge of the sheet bundle, and the back binding edge of the sheet bundle is formed in the recessed groove 65y. An immersive configuration is adopted. One or more recessed grooves 65y are formed on the left and right of the sheet bundle according to the sheet size. FIG. 5 shows an example in which the cutting edge press member 65b has two recessed grooves 65y formed on the left and right sides, for a total of four places.

[Buffer member]
As shown in FIG. 7A, the cutting portion 65 has a moving mechanism 66M that moves a buffer member 66 formed of a synthetic resin or the like in a film shape along the blade receiving member 65c. The moving mechanism 66M includes a winding roll 66b that winds up the buffer member 66, a stepping motor Mx that rotationally drives the winding roll 66b, and a supply roll 66a that supports the other end of the buffer member 66 and supplies the buffer member 66. Configured. The center portion of the take-up roll 66b is disposed at a position separated from the receiving surface formed by the sheet center receiving surface 65ca, the cutting edge receiving surface 65cc, and the cutting edge receiving surface 65cc of the blade receiving member 65c. In other words, the take-up start position of the take-up roll 66b is arranged farther from the retreat position EP retracted from the sheet bundle discharge path (bookbinding path 33) with reference to the receiving surface of the blade receiving member 65. 7A and 7B, the cutting blade 65x is disposed at a position closer to the take-up roll 66b than the supply roll 66a, and the sheet bundle is advanced from the standby position to the cutting position. Trim the edge (periphery) of.

[Bundle output section]
As shown in FIG. 4, on the downstream side of the cutting unit 65, a storage stacker 68 (see also FIG. 2) that stores the sheet bundle in an upright position, and the bound sheet bundle from the cutting unit 65 to the storage stacker 68. A paper discharge roller 67 to be moved is disposed, and the paper discharge roller 67 constitutes a bundle discharge portion. As shown in FIG. 1, the storage stacker 68 is arranged in a drawer shape on the casing 30, and is configured to be able to be pulled out to the front side of the apparatus (the front side in FIG. 1). The user can visually recognize from the upper surface direction in a state of being pulled out to the front side of the apparatus. On the other hand, as shown in FIG. 4, a transmissive full detection sensor 68Sf is disposed in the waste box 69, and the full state of the sheet bundle stored in the storage stacker 68 is detected and displayed on the control panel 71. The operator is warned of the removal.

[Control unit]
As shown in FIG. 8, the control unit 75 includes a CPU that functions as a central processing unit, a ROM that records the basic control program and program data of the bookbinding apparatus B, a RAM that functions as a work area of the CPU, and a control unit of the image forming apparatus A. 70 and a communication unit that communicates with the post-processing device C, an A / D converter for taking in detection information from each sensor, a D / A converter for operating various drive units according to a determination from the CPU, a motor, a solenoid, and the like And a driver circuit for operating the actuator.

  FIG. 8 also shows the function of this configuration (dotted line). That is, the control unit 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 unit 70 of the image forming apparatus A. On the other hand, sheet sensors Se1 to Se6 that detect sheets (sheet bundles) to be conveyed are arranged in the carry-in path 31, the bookbinding path 33, and the cover sheet conveyance path 34 (see FIG. 2). The signals from the sensors are taken in, and the operation of each unit described above is controlled, such as stacking unit control, adhesive temperature control, adhesive application control, cover binding control, cutting control, stack control, and the like.

<Post-processing device>
As described above, the post-processing apparatus C is provided with the post-processing path 38 that is continuous with the cover transport path 34 of the bookbinding apparatus B. The post-processing path 38 includes post-processing such as a staple unit, a punch unit, and a stamp unit. Unit is arranged. The post-processing apparatus C also has a control unit having a microcomputer or the like, and the mode set by the CPU of the control unit 70 of the image forming apparatus A directly from the image forming apparatus A or through the bookbinding apparatus B. Is received, and processing is performed according to the received information.

(Operation)
Next, the operation of the image forming system of the present embodiment will be described focusing on the operation of the bookbinding apparatus B. Such an operation is performed mainly by the CPUs of the respective control units of the image forming apparatus A, the bookbinding apparatus B, and the post-processing apparatus C. In the following description, each part of the bookbinding apparatus B according to the present invention will be described. In order to facilitate understanding of the operation, the operation of the bookbinding apparatus B will be described mainly with respect to each unit. In order to simplify the explanation, it is assumed that the operator has instructed a bookbinding mode (mode for bookbinding by the bookbinding apparatus B) for feeding a cover from the inserter device 26.

  As described above, the image forming apparatus A conveys a sheet from the paper feeding unit 2 to the printing unit 3 in accordance with an input instruction from the control panel 71 or an instruction from an external computer, and forms an image on the sheet by the printing unit 3. The print sheets are discharged from the paper discharge port 14 one by one. Note that the control unit 70 of the image forming apparatus A notifies the control unit of the bookbinding apparatus B of sheet size information and the like (see FIG. 8).

  The print sheets discharged from the paper discharge port 14 of the image forming apparatus A are sequentially discharged from the paper discharge port 32b via the middle paper conveyance path 32 of the bookbinding apparatus B, and are stacked on the stacking tray 41 of the stacking unit 40. Parts are aligned in a bundle. The stacking unit 40 delivers the aligned sheet bundle to the grip conveyance unit 47. The grip conveyance unit 47 deflects the sheet bundle from the inclined posture to the vertical posture, and sets the sheet bundle at the adhesive application position E along the bookbinding path 33. In this state, the roll rotation motor MR of the adhesive application unit 55 starts to drive, and then the drive motor MS is driven to move the glue container 56 along the guide rail 52. The glue container 56 once moves from the home position HP toward the return position RP, and returns from the return position RP to the home position HP. Thereby, the paste application to the sheet bundle is completed. Before the glue application to the sheet bundle of the adhesive application unit 55 is completed, the cover binding unit 60 feeds the cover sheet Sh from the inserter device 26, and after the glue application is completed, the cover sheet Sh supported by the back plate 61. The sheet bundle S2 is joined in an inverted T shape, and the sheet bundle is pinched by the folding roll 63 to be folded, and the folding roll 63 is driven to deliver the sheet bundle mounted to the bundle posture deflecting unit 64. .

  The bundle posture deflecting unit 64 drives the grip motor Mg, the turning motors Mt1 and Mt2, and the lifting motor Ma, deflects the mounted sheet bundle to a predetermined posture, and positions the sheet bundle at the cutting position G of the cutting unit 65. In parallel with positioning at the cutting position G of the sheet bundle mounted by the bundle posture deflecting unit 64, the shift mechanism 65S of the cutting unit 65 determines the position of the recessed groove 65y formed in the cutting edge press member 65b at the back of the sheet bundle. The stepping motor Mo is driven so as to coincide with the edge, that is, the back edge of the sheet bundle is positioned in the recessed groove 65y (see FIG. 7C). For these positioning and positioning, the CPU of the control unit 75 refers to the sheet size information notified from the control unit 70 of the image forming apparatus A.

  As shown in FIG. 9A, the sheet bundle is delivered from the cover binding portion 60 to the bundle posture deflecting portion 64 with the back edge from the cover binding position F downward. The bundle posture deflection unit 64 selects nip positions (La, Lb, and Lc shown in FIG. 9A) for gripping the sheet bundle by the lifting motor Ma according to the sheet size. This nip position selection is instructed by the control unit 75. That is, the CPU of the control unit 75 selects whether to hold the nip position La at the distance L1, the nip position Lb at the distance L2, and the nip position Lc at the distance L3 based on the sheet size information of the sheet bundle. When the sheet bundle is turned 90 degrees around the nip position, the top part is set to the upper side in the state shown in FIG. Thus, by selecting the nip positions La, Lb, and Lc, it is possible to match the back edge of the sheet bundle when the top portion is deflected upward with the recessed groove 65y set in advance.

  Next, by driving the solenoid described above, the cutting edge press member 65b is pressed against the blade receiving member 65 via the buffer member 66 (see FIG. 7A). Thereby, the edge (lower part) of the mounted sheet bundle is pressed (held) toward the blade receiving member 65. Next, by operating the cutter motor Mc, the cutting blade 65x at the standby position is advanced to the cutting position, and for example, the top portion of the mounted sheet bundle is trimmed and cut. In addition, the paper piece waste cut | disconnected in the cutting position G falls with the dead weight, and is accommodated in the waste box 69 (refer FIG. 4). When finishing the top trimming cut (after returning the cutting blade 65x to the standby position), the cutting edge press member 65b does not press the sheet bundle from the position where the sheet bundle is pressed by releasing the solenoid. Move to a position away from the bundle (see FIG. 4). Note that the grip motor Mg of the bundle posture deflection unit 64 maintains the state where the mounted sheet bundle is held.

  Next, the buffer member 66 is wound around the take-up reel 66b by driving the stepping motor Mx. As a result, the cut made in the buffer member 66 by the cutting blade 65x is positioned at the retracted position EP that is retracted from the sheet bundle discharge path. Note that the CPU counts the pulses output from the motor driver to the stepping motor Mx, thereby ensuring that the cut made in the buffer member 66 is positioned at the retreat position EP.

  Next, the bundle posture deflecting unit 64 drives the turning motors Mt1 and Mt2 to rotate the sheet bundle by 90 ° and drives the lifting motor Ma to position the fore edge portion at the cutting position G of the cutting unit 65, for example. Next, after the solenoid is driven, the cutting edge press member 65b presses the sheet bundle toward the blade receiving member 65 via the buffer member 66, and then the cutter motor Mc is operated to cut the cutting blade in the standby position. By trimming 65x to the cutting position, the fore edge portion of the mounted sheet bundle is trimmed and cut. Then, by driving the stepping motor Mx, the cut made on the buffer member 66 by the cutting blade 65x is positioned at the retracted position EP. Similarly, trimming of the ground portion is also performed. Therefore, it is possible to perform a trimming cut in which the sheet bundle is sequentially rotated by 90 degrees, and the top portion, the ground portion, and the fore edge portion are deflected downward at the cutting position G on the downstream side to cut the peripheral edge 3 direction of the sheet bundle.

  When the trimming cut at the last peripheral edge in the three peripheral edge directions of the sheet bundle is completed, the grip motor Mg still maintains the state of gripping the mounted sheet bundle. On the other hand, after the solenoid is de-energized and the cutting edge press member 65b is moved to a position where the sheet bundle is not pressed, the stepping motor Mx is driven to retreat the cut made on the buffer member 66 by the cutting blade 65x. Position at position EP. Then, the sheet discharge roller 67 is driven to stop the driving of the grip motor Mg, and the lift motor Ma is driven (the bundle posture deflecting unit 64 is lowered while gripping the sheet bundle and is moved to the sheet discharge roller 67. When the bundle is handed over, the bound sheet bundle (having been trimmed in the three peripheral directions) is stored in the storage stacker 68, and the processing for one book is completed. Subsequently, when there is an instruction for the bookbinding mode, the above operation is repeated.

  The post-processing apparatus C receives the print sheet from the image forming apparatus A via the cover sheet conveyance path 34 of the bookbinding apparatus B, performs stapling processing, punching processing, stamping processing, and the like on the printing sheet and discharges them to the paper discharge tray 37. . Further, the sheet from the image forming apparatus A that is not subjected to such post-processing is directly discharged onto the discharge tray 37. When the paper discharge tray 37 is designated by the operator via the control panel 71, the post-processing apparatus C also functions as a sorter by discharging the sheet onto the designated paper discharge tray 37.

(Effects etc.)
Next, functions and effects of the image forming system according to the present embodiment will be described focusing on functions and effects of the bookbinding apparatus B.

  In the conventional bookbinding apparatus, among the sheets constituting the sheet bundle, a sheet far from the sheet cutting blade to be cut last by the cutting blade, that is, a sheet closest to the blade receiving member) There was a problem that it was harder to cut than a sheet. In the image forming system of the present embodiment, in the bookbinding apparatus B, the buffer member 66 is interposed at a position farther than the sheet farthest from the cutting blade 65x among the sheets constituting the sheet bundle. For this reason, the object which is hard to cut becomes the buffer member 66, and all the sheets constituting the sheet bundle are cut reliably. Further, since the buffer member 66 is interposed between the blade receiving member 65c and the sheet bundle, the cutting blade 65x does not directly collide with the blade receiving member 65c after cutting the sheet bundle. For this reason, durability of the cutting blade 65x can be improved.

  In the bookbinding apparatus B, a recessed groove 65y is formed in the cutting edge press member 65b along the longitudinal direction of the cutting blade 65x. For this reason, the swelling of the back part of the sheet bundle bound by the adhesive application unit 55 and the display binding part 60 is absorbed by the recessed groove 65y, and the sheet bundle is gripped between the cutting edge press member 65b and the blade receiving member 65c without any gap. can do. Accordingly, the sheet bundle can be cut without being wobbled between the cutting edge press member 65b and the blade receiving member 65c when cutting with the cutting blade 65x. Further, the bookbinding apparatus B includes a shift mechanism 65S that moves the cutting edge press member 65b along the longitudinal direction of the cutting blade 65x according to the sheet size. The shift mechanism 65S is positioned by the bundle posture deflection unit 64. The cutting edge press member 65b is moved so that the back edge of the sheet bundle to be positioned is located in the recessed groove 65y. For this reason, the swelling of the back portion of the sheet bundle is surely absorbed in the recessed groove 65y, and the sheet bundle can be cut more accurately without being fluctuated between the cutting edge press member 65b and the blade receiving member 65c at the time of cutting. .

  Further, in the bookbinding apparatus B, when the bundle posture deflection unit 64 positions the sheet bundle at the cutting position G, the edge position of the back portion of the sheet bundle can be adjusted in the longitudinal direction of the cutting blade 65x. That is, the bundle posture deflecting unit 64 can adjust the edge position of the back portion of the sheet bundle according to the sheet size by driving the turning motors Mt1 and Mt2 for turning the sheet bundle (FIG. 9). (Refer to (a) and (b)). Further, the nip position for gripping the sheet bundle is selected by the grip motor Mg and the lifting motor Ma so that the swelling of the back portion of the sheet bundle is absorbed by the recessed groove 65y of the cutting edge press member 65b. Therefore, in combination with the shift mechanism 65S, the concave groove 65y can more reliably absorb the swelling of the back portion of the sheet bundle.

  In addition, the bookbinding apparatus B includes a moving mechanism 66M that moves the buffer member 66 along the flat receiving surface of the blade receiving member 65c. For this reason, the smooth movement of the buffer member 66 can be ensured. Here, a member for forming a recessed groove that absorbs the swelling of the back of the sheet bundle will be considered. In the bookbinding apparatus B, the recessed groove 65y is formed in the cutting edge press member 65b, but it is also conceivable to form the recessed groove on the blade receiving member 65c side. However, in such a case, after the sheet bundle is cut by the cutting blade 65x, when the buffer member 66 is wound by a predetermined distance along the blade receiving member 65c and moves, the buffer member 66 is moved to the buffer member 66 by the cutting blade 65x. Since the formed cut enters the recessed groove of the blade receiving member, the buffer member 66 is damaged, and the smooth movement of the buffer member 66 cannot be ensured. For this reason, the bookbinding apparatus B avoids this problem by forming the recessed groove on the cutting edge press member 65b side without forming the recessed groove on the blade receiving member 65c side to absorb the swelling of the back edge of the sheet bundle. Smooth movement of the buffer member 66 is ensured.

  Further, the bookbinding apparatus B employs a configuration in which the cutting blade 65x is disposed at a position closer to the take-up roll 66b than the supply roll 66a, and the edge of the sheet bundle is cut with the cutting blade 65x. With such a configuration, even when the film-like cushioning member 66 is cut by the cutting blade 65x, the cutting process is performed at a position close to the winding roll 66b. Therefore, the cut is wound on the winding roll 66b. The distance until it is formed is small, and the risk of the buffer member 66 being damaged due to the cut during the movement can be reduced. If the cut portion is completely wound on the take-up roll 66b, problems such as a jam on the conveyance due to breakage of the buffer member 66 due to the cut do not occur. On the other hand, when the cutting blade 65x is configured to perform the cutting process at a position far from the winding roll 66b, the distance until the cut by the cutting blade 65x is wound around the winding roll 66b becomes long, and the buffer member 66 A lot of waste occurs. In order to reduce the waste, it is conceivable that the buffer member 66 is stopped and the cutting process is performed before the cut portion is wound. However, the buffer member 66 has a plurality of cuts, that is, the buffer member 66 itself. It will wind up in the state where intensity | strength of fell, and the risk that the buffer member 66 will be damaged will increase.

  Further, the bookbinding apparatus B has a grip motor Mg that grips the sheet bundle in the bundle posture deflecting unit 64. The grip motor Mg grips the sheet bundle and releases the pressing to the sheet bundle by the cutting edge press member 65b. In this state, the buffer member 66 is moved by the moving mechanism 66M (the buffer member 66 is wound around the winding roll 66b by driving the stepping motor Mx). Accordingly, in the bookbinding apparatus B, the buffer member 66 is moved in a state where the friction with the sheet bundle and the pressing force are released, so that the buffer member 66 can be moved smoothly.

  Further, in the bookbinding apparatus B, the winding roller 66b is rotated by operating the stepping motor Mx of the moving mechanism 66M simultaneously with or earlier than the discharging operation of the sheet bundle to the storage stacker 68 by the discharge roller 67. . For this reason, the buffer member 66 is prevented from being damaged by the movement of the sheet bundle with the leading edge of the sheet bundle entering the cut of the buffer member 66 attached by the cutting blade 65x. Can do. Further, by operating the moving mechanism 66 (stepping motor Mx) faster than the paper discharge roller 67, it is possible to scrape the paper waste remaining in the sheet bundle from the sheet bundle.

  Also, since the winding roll 66b is rotated by operating the stepping motor Mx of the moving mechanism 66M simultaneously with the discharging operation of the sheet bundle or earlier than the discharging operation, the buffer member 66 moves along the blade receiving member 65c. Take-up roll 66b, which is generated when paper scraps of sheets (bundles) cut by the cutting blade 65x are wound on the take-up roll 66b. Inhibition of the operation and breakage of the buffer member 66 can be prevented. That is, in the blade receiving member 66, the sheet center receiving surface 66a and the cutting edge receiving surface 66c are made of a conductive material and are grounded. For this reason, it is possible to prevent the paper scraps from adhering to and remaining on the buffer member 66 due to static electricity.

  Further, in the bookbinding apparatus B, a retreat position EP is provided in which the cut formed in the buffer member 66 by the cutting blade 65x is retreated from the discharge route of the sheet bundle discharged to the storage stacker 68 by the discharge roller 67. After the cut is moved to the retreat position EP, the paper discharge roller 67 is operated. Therefore, breakage of the buffer member 66, adhesion to the buffer member 66, and remaining can be reliably prevented.

  In the present embodiment, the sheet bundle cutting apparatus according to the present invention, which includes the bundle posture deflecting unit 64 and the cutting unit 65, includes the stacking unit 40, the grip conveying unit 47, the adhesive application unit 55, and the cover binding unit 60. Although the bookbinding apparatus B is exemplified, the present invention is not limited to this, and a sheet bundle or a bound sheet bundle may be automatically or manually supplied to the bundle posture deflecting unit 64. And a sheet cutting apparatus having a bookbinding binding unit (adhesive application unit 55, or adhesive application unit 55 and cover binding unit 60), a bundle posture deflection unit 64, and a cutting unit 65. Thus, the bookbinding apparatus may be configured. In this case, in the present embodiment, the example in which the back portion of the sheet bundle is bound with the adhesive by the adhesive application unit 55 is shown, but the present invention is not limited to this, and for example, the back portion of the sheet bundle is bound with the staple unit. You may make it match.

  In the present embodiment, the buffer member 66 is moved in the same direction as the sheet bundle conveying direction along the receiving surface of the blade receiving member 65c. However, the present invention is not limited to this. . For example, you may make it move to the direction orthogonal to a sheet | seat bundle conveyance direction along the receiving surface of the blade receiving member 65c. In this way, the width of the buffer member 66 can be reduced (for example, the width of the buffer member 66 can be the same as or slightly larger than the width of the blade receiving surface 66b). The cost of the member 66 can be reduced.

  Further, in the present embodiment, an example in which the buffer member 66 is brought into direct contact with the blade receiving member 65c has been described, but the width of the buffer member 66 is larger than the width of the blade receiving member 65c (see FIG. 7B). A roller may be provided between the supply roll 66a and the blade receiving member 65c and between the blade receiving member 65c and the take-up roll 66b. If comprised in this way, the buffer member 66 can be conveyed more reliably.

  In this embodiment, since the CPU of the control unit 75 of the bookbinding apparatus B recognizes the sheet thickness, the number of pulses output from the driver circuit is adjusted according to the sheet thickness, so that the cutter motor Mc The speed may be adjusted. When such control is employed, the durability of the cutting blade 65x and the blade receiving member 65c can be further improved.

  Further, in the present embodiment, the configuration in which the bundle posture deflection unit 64 serves as both the “positioning unit” and the “gripping unit” of the present invention is illustrated, but the present invention is not limited to this, and the “gripping unit” and the “positioning unit” May be configured separately (separately).

  The present invention provides a sheet bundle cutting apparatus capable of completely cutting a sheet bundle without reducing the durability of the cutting blade, and a bookbinding apparatus provided with the sheet bundle cutting apparatus. Since it contributes to the manufacture and sale of equipment, it has industrial applicability.

1 is a front sectional view of an image forming system according to an embodiment to which the present invention is applicable. 1 is a front sectional view of a bookbinding apparatus that constitutes an image forming system of an embodiment. It is a front sectional view of the adhesive application part of a bookbinding apparatus, (a) is a glue container, (b) shows the aspect of adhesive application. It is a front sectional view showing a bundle posture deflection unit and a cutting unit of the bookbinding apparatus. It is a perspective view which shows the arrangement configuration of the cutting edge press member and blade receiving member of a bookbinding apparatus. 4A and 4B are front sectional views of the cutting unit of the bookbinding apparatus, in which FIG. It is explanatory drawing of the cutting part of a bookbinding apparatus, (a) is front sectional drawing, (b) is a figure when it sees from the arrow B direction of (a), (c) is when it sees from the arrow C direction of (a) FIG. FIG. 3 is a block diagram schematically illustrating the configuration and functions of a control unit of the image forming apparatus and the bookbinding apparatus. 4A and 4B are explanatory diagrams illustrating a gripping state of a sheet bundle of a bundle posture deflection unit of the bookbinding apparatus, where FIG. 5A illustrates a gripping position according to a sheet size, and FIG. 5B illustrates a gripping position when the sheet bundle is rotated by 90 °. It is explanatory drawing which shows the name of each part of the sheet bundle bound by the bookbinding apparatus.

Explanation of symbols

55 Adhesive application part (part of bookbinding binding means)
60 Cover binding part (part of bookbinding means)
64 Bundle posture deflection unit (positioning means, gripping means)
64a, 64b (part of clip rotating part)
65 Cutting part 65b Cutting edge press member (pressing means)
65c Blade receiving member 65S Shift mechanism (shift means)
65x cutting blade 65y recessed groove 66 buffer member 66a supply roll (holding part)
66b Winding roll (winding part)
66M Moving mechanism (moving means)
67 paper ejection row La 75 controller EP retracted position G cutting position Mc cutter motor (driving means)
Mg grip motor (part of clip rotating part)
Mt1, Mt2 Rotating motor (part of the clip rotating part)

Claims (11)

Positioning means for positioning the sheet bundle at a predetermined cutting position;
A cutting blade which is disposed at the cutting position and cuts an edge of the sheet bundle positioned by the positioning means;
A blade receiving member disposed opposite to the cutting blade across the sheet bundle,
Pressing means for pressing the sheet bundle toward the blade receiving member;
A buffer member that is interposed between the blade receiving member and the sheet bundle and receives a cutting edge of the cutting blade that cuts the sheet bundle;
Drive means for reciprocating the cutting blade between a standby position and a cutting position;
Equipped with a,
The sheet pressing apparatus according to claim 1, wherein the pressing means includes at least one recessed groove provided along a longitudinal direction of the cutting blade at a position corresponding to a back edge of the sheet bundle. Positioning means for positioning the sheet bundle at a predetermined cutting position;
A cutting blade which is disposed at the cutting position and cuts an edge of the sheet bundle positioned by the positioning means;
A blade receiving member disposed opposite to the cutting blade across the sheet bundle,
Pressing means for pressing the sheet bundle toward the blade receiving member;
A buffer member that is interposed between the blade receiving member and the sheet bundle and receives a cutting edge of the cutting blade that cuts the sheet bundle;
Drive means for reciprocating the cutting blade between a standby position and a cutting position;
Moving means for moving the buffer member along the blade receiving member;
Gripping means for gripping the sheet bundle;
With
The sheet bundle cutting device, wherein the buffer member is moved by the moving unit in a state where the sheet bundle is held by the holding unit and the pressing by the pressing unit is released. 3. The sheet bundle cutting according to claim 2 , wherein the pressing unit includes at least one recessed groove provided along a longitudinal direction of the cutting blade at a position corresponding to a back edge of the sheet bundle. apparatus. The shift unit further includes a shift unit that moves the pressing unit in the longitudinal direction of the cutting blade, and the shift unit includes the pressing unit so that a back edge of a sheet bundle positioned by the positioning unit is positioned in the recessed groove. The sheet bundle cutting device according to claim 1 or 3 , wherein the sheet bundle cutting device is moved. The sheet bundle cutting device according to claim 1, further comprising a moving unit that moves the buffer member along the blade receiving member. The buffer member is configured by a sheet-like member, and the moving unit is configured by a winding unit that winds up the buffer member, and a holding unit that holds the other end of the buffer member, 6. The sheet bundle cutting apparatus according to claim 2 , wherein an edge of the sheet bundle is cut at a position closer to the winding unit than the holding unit. Includes a gripping means for gripping the sheet bundle, according to claim 5, wherein in the gripping means to grip the sheet bundle while releasing the pressing by the pressing means, characterized in that moving the cushioning member by said moving means A sheet bundle cutting apparatus according to claim 1. 2. The positioning unit is configured to be capable of adjusting an edge position of a back portion of the sheet bundle in a longitudinal direction of the cutting blade when positioning the sheet bundle at the cutting position. The sheet bundle cutting device according to any one of claims 7 to 9 . The positioning means includes a grip rotating unit that grips and swivels the sheet bundle, and a control unit that controls gripping and swiveling operations of the grip rotating unit, and the control unit includes the sheet bundle. After gripping the sheet bundle, the sheet bundle is pivoted to be positioned at the cutting position, and the back edge of the sheet bundle is positioned at a predetermined position of the blade receiving member by adjusting the position where the sheet bundle is gripped. The sheet bundle cutting device according to claim 8 , wherein the grip rotating unit is controlled as described above. The control unit controls a turning operation of the grip rotation unit so as to turn the sheet bundle to position the top part, the fore edge part, and the ground part at the cutting position, respectively. The sheet bundle cutting apparatus according to 9 . Bookbinding means for binding the back of the sheet bundle;
A sheet bundle cutting device for cutting a peripheral edge of a sheet bundle bound by the bookbinding means;
With
A bookbinding apparatus comprising the sheet bundle cutting apparatus having the structure according to any one of claims 1 to 10 .

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