JP7121718B2 - Sheet bundle discharge device - Google Patents

Description

The present invention relates to a sheet bundle discharging device for discharging a sheet bundle.

2. Description of the Related Art Conventionally, there is a bookbinding apparatus provided with a storage section for storing a plurality of sheet bundles (booklets) formed by binding a plurality of sheets on which images are formed (Patent Document 1).

JP 2005-305822 A

However, in the conventional storage unit, the user has to take out the sheet bundle every time the amount of the stored sheet bundle reaches a certain amount. Since the operation of the bookbinding device must be stopped while the user is taking out the sheet bundle from the storage unit, the bookbinding operation cannot be performed continuously, and the productivity of the device cannot be improved. Further, in order to improve the productivity of the apparatus by performing continuous bookbinding operations, it is required that the sheet bundles can be stably discharged in order to prevent the continuous production of the sheet bundles from being stopped due to the occurrence of an abnormality. It is

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sheet bundle discharging device capable of stably discharging a sheet bundle.

The present invention relates to a sheet bundle discharging device for discharging a sheet bundle including a spine, comprising a conveying means for conveying the sheet bundle, and a sheet bundle conveyed by the conveying means so that the spine is at the front. a guide means for guiding, a conveying belt for conveying the sheet bundle to the outside of the sheet bundle discharge device, and a receiving means for receiving the spine of the sheet bundle guided by the guide means, which is separated from the conveying belt . a receiving means rotatable between a first position for receiving the spine of the sheet bundle and a second position for placing the sheet bundle on the conveying belt ; attitude changing means for rotating the edge of the sheet bundle from the first position to the second position, wherein the attitude changing means causes the receiving means to move from the first position to the second position. By rotating, in the belt width direction of the conveying belt, it moves so as to pass through the region where the conveying belt is provided, and the receiving means receives the spine of the sheet bundle at the first position. the first surface against which the spine abuts, and the sheet stack is slidable before the spine abuts against the first surface, and the receiving means moves from the first position to the second position; A second surface for pushing the sheet bundle is arranged to face the second surface in the rotating direction of the receiving means while the receiving means is rotated to the position, and the receiving means moves from the first position to the second position. and a third surface for restricting the movement of the sheet bundle in the rotating direction of the receiving means while rotating to position 2, wherein the third surface includes a third surface in a direction approaching the first surface. A flocked sheet flocked with growing hair is provided, and the coefficient of friction between the sheet bundle and the third surface in a direction away from the first surface is the friction between the first surface and the sheet bundle. It is characterized by being greater than the coefficient.

Further, the present invention is a sheet bundle discharging device for discharging a sheet bundle including a spine, comprising: conveying means for conveying the sheet bundle; a conveying belt for conveying the sheet bundle to the outside of the sheet bundle discharging device; and receiving means for receiving the spine of the sheet bundle guided by the guide means, wherein the conveying belt a receiving means rotatable between a first position for receiving the spine of the sheet bundle away from the sheet bundle and a second position for placing the sheet bundle on the conveying belt ; attitude changing means for rotating the sheet bundle from the first position to the second position, wherein the attitude changing means moves the receiving means from the first position to the second position. By rotating to the position, in the belt width direction of the conveying belt, the receiving means moves so as to pass through the area where the conveying belt is provided, and the receiving means receives the spine of the sheet bundle at the first position. a first surface with which the spine abuts when receiving the sheet stack, and the sheet stack is slidable before the spine abuts against the first surface, and the receiving means moves from the first position to the first sheet stack; 2, a second surface for pushing the sheet bundle is arranged to face the second surface in the rotating direction of the receiving means, and the receiving means moves from the first position to the second surface. a third surface for restricting the movement of the sheet stack in the rotating direction of the receiving means while the sheet stack is rotated to the second position, wherein the third surface approaches the first surface; A flocked sheet flocked with hairs extending in a direction is provided, and the coefficient of friction between the sheet bundle and the third surface in the direction away from the first surface is the friction coefficient between the second surface and the sheet bundle is greater than the coefficient of friction of

According to the present invention, the sheet bundle can be stably discharged.

1 is a schematic diagram showing an image forming apparatus according to an embodiment of the invention; FIG. 1 is a schematic cross-sectional view showing a bookbinding apparatus according to an embodiment of the present invention; FIG. (a) is a front view showing an adhesive application part of an embodiment of the present invention, and (b) is a view in the direction of arrow J of (a). FIG. 2 is a schematic diagram showing a cover binding section, a bundle attitude deflection section, a cutting section, and a discharge section according to the embodiment of the present invention; 1 is a schematic diagram of a sheet bundle discharging device according to an embodiment of the present invention; FIG. 1 is a perspective view of an area including a backrest of an embodiment of the invention; FIG. 1 is a schematic diagram of a backrest of an embodiment of the present invention; FIG. FIG. 4 is a side view of the backrest of the embodiment of the present invention positioned at the booklet receiving position; (a) is a diagram showing a state in which the backrest unit receives a booklet in the sheet bundle discharge device according to the embodiment of the present invention, and (b) is an enlarged view of the backrest unit in the state of (a). (a) is a diagram showing a state in which the backrest unit receives a booklet and starts rotating in the sheet bundle discharge device according to the embodiment of the present invention, and (b) is an enlarged view of the backrest unit in the state of (a). FIG. 2 is a side view showing a state in which booklets are placed on a belt conveyor in the sheet bundle discharge device according to the embodiment of the present invention; FIG. 4 is a schematic diagram showing a state in which booklets are placed on a belt conveyor in the sheet bundle discharge device according to the embodiment of the present invention; FIG. 4 is a schematic diagram showing a state in which a booklet placed on a belt conveyor is conveyed outside the apparatus in the sheet bundle discharge device according to the embodiment of the present invention; FIG. 2 is a control block diagram of the image forming apparatus according to the embodiment of the invention;

An image forming system including a bookbinding device having a sheet bundle discharging device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic cross-sectional view of the image forming system D along the sheet conveying direction. FIG. 2 is a schematic cross-sectional view of the bookbinding apparatus B along the sheet conveying direction.

The image forming system D includes an image forming apparatus A that sequentially forms toner images on sheets, a bookbinding apparatus B arranged downstream of the image forming apparatus A, and a post-processing apparatus C arranged downstream of the bookbinding apparatus B. , consists of In the image forming system D, the sheets on which images are formed by the image forming apparatus A are bound by the bookbinding apparatus B. FIG. In addition, the image forming system D causes sheets that are not subjected to bookbinding processing to pass through the bookbinding device B, undergo post-processing in the post-processing device C, and then be discharged.

[Image forming apparatus A]
Image forming apparatus A forms an image on a sheet. As the image forming apparatus A, various devices such as a copying machine, a printer, and a printing machine can be used. ing. The image forming apparatus A incorporates a sheet feeding section 2 , an image forming section 3 , a sheet discharging section 4 , and an image forming apparatus control section 101 in an apparatus main body 1 . A plurality of cassettes 5 corresponding to sheet sizes are arranged in the vertical direction in the sheet supply section 2 . The sheet supply unit 2 feeds a sheet of the size instructed by the image forming apparatus control unit 101 to the feeding path 6 . A registration roller pair 7 is provided in the feeding path 6 . After aligning the leading edges of the sheets, the registration roller pair 7 feeds the sheets with the aligned leading edges to the image forming section 3 on the downstream side at a predetermined timing.

An electrostatic drum 10 is provided in the image forming section 3 . Around the electrostatic drum 10, a print head 9, a developing device 11, a transfer charger 12, and the like are arranged. The print head 9 is composed of, for example, a laser emitter or the like, and forms an electrostatic latent image on the electrostatic drum 10 . The electrostatic latent image is toner-developed by the developing device 11 to form a toner image. The toner image is transferred onto the sheet at transfer charger 12 . The toner image transferred onto the sheet is fixed onto the sheet by a fixing device 13 . After that, the sheet is sent to the sheet discharge path 17 . A sheet discharge port 14 is formed in the sheet discharge portion 4, and a sheet discharge roller pair 15 is arranged. The circulation path 16 is used when images are formed on both sides of the sheet, and after the sheet from the sheet discharge path 17 is sent to the switchback path and turned upside down, the sheet is again guided to the registration roller pair 7 . A toner image is formed on the back side of the sheet by the image forming section 3 . A sheet having a toner image formed on one side or both sides in this manner is fed to the bookbinding apparatus B from the sheet discharge port 14 by the sheet discharge roller pair 15 .

A scanner unit 20 provided on the upper part of the apparatus main body 1 optically reads an image of a document. The scanner unit 20 includes a platen glass 23 on which a document is placed by a user, a carriage 21 that optically reads the document along the platen glass 23, optical reading means 22 that photoelectrically converts an optical image from the carriage 21, etc. A CCD device, for example, is used for the optical reading means 22 . The scanner unit 20 has a document feeding device 25 for automatically feeding the document to the platen glass 23 at the top.

[Bookbinding device B]
FIG. 2 is a schematic cross-sectional view of the bookbinding apparatus B along the sheet conveying direction. The bookbinding device B is arranged to be connected to the image forming device A. As shown in FIG. In the following description, a sheet to be the cover sheet of a sheet bundle is also referred to as a "cover sheet", a sheet covered by the cover sheet as a "middle sheet", and a bundle of middle sheets as a "middle sheet bundle". Further, in the following description, a middle sheet bundle covered with a cover is also referred to as a "sheet bundle with a cover", and a trimmed sheet bundle with a cover is also referred to as a "booklet". These sheet bundles are also simply referred to as sheet bundles.

The bookbinding apparatus B includes a casing 30, a stacking unit 40 for stacking and aligning the middle sheets on which toner images have been formed, provided in the casing 30, and an adhesive agent applied to the middle sheet bundle from the stacking unit 40. and an adhesive application portion 55 for applying the . Further, the bookbinding apparatus B includes a cover binding unit 60 that binds the cover to the adhesive-applied middle sheet bundle, a bundle attitude deflection unit 64 that changes the orientation of the cover-bound sheet bundle bound to the cover, and an orientation deflector 64. and a trimming section 65 for trimming the edge of the sheet bundle. The bookbinding device B has a sheet bundle discharging device K for discharging a booklet formed by trimming.

[Conveyance path configuration]
A transport path for each sheet will be described. A carry-in path 31 connected to the sheet discharge port 14 of the image forming apparatus A is provided in the casing 30 . The carry-in path 31 is connected to the inner sheet transport path 32 and the cover sheet transport path 34 via a path switching member 36 . The middle sheet conveying path 32 is connected to the bookbinding path 33 via the stacking section 40 . The cover conveying path 34 is connected to a post-processing path 38 of a post-processing apparatus C (see FIG. 1), which will be described later. The bookbinding path 33 extends through the bookbinding apparatus B in a substantially vertical direction. The cover conveying path 34 traverses the bookbinding apparatus B in a substantially horizontal direction. Therefore, the bookbinding path 33 and the cover conveying path 34 intersect (perpendicularly) each other. In the bookbinding apparatus B, a cover binding section 60, which will be described later, is arranged at a place where the bookbinding path 33 and the cover conveying path 34 intersect.

In the configuration of the transport path as described above, the carry-in path 31 receives from the image forming apparatus A a sheet (middle sheet) on which a toner image has been formed. In this case, the image forming apparatus A feeds a middle sheet and a print sheet (cover) on which a title or the like is printed, which is used as a cover cover. The middle sheet and the cover are sorted into the middle sheet conveying path 32 and the cover conveying path 34 by the path switching member 36 and conveyed.

An inserter device 26 is connected to the carry-in route 31 (see FIG. 1). The inserter device 26 feeds cover sheets that are not to be printed by the image forming apparatus A one by one from the feed tray 26 a to the carry-in path 31 . The inserter device 26 includes one or more feed trays 26a, and a cover sheet feeding unit that is arranged at the front end of the feed tray 26a and separates and feeds the sheets stacked on the feed tray 26a one by one. 29, a cover sheet feeding path 27 on the downstream side of the cover sheet feeding section 29, and the like. The cover sheet feeding path 27 is connected to the carry-in path 31 via a path switching member 28 . A conveying roller pair 31 a is arranged in the carry-in path 31 . A conveying roller pair 32 a is arranged in the middle sheet conveying path 32 . The bookbinding path 33 is provided with a grip conveying section 47, a bundle attitude deflection section 64 (to be described later), a sheet bundle discharge roller pair 66, and the like. A conveying roller pair 34 a is arranged in the cover sheet conveying path 34 . A pair of conveying rollers 38a is arranged in the post-processing path 38 of the post-processing device C, which will be described later. The inner sheet and the cover are fed by respective conveying roller pairs rotated by drive motors (not shown).

[Post-processing device C]
As shown in FIG. 1, the bookbinding device B is connected with a post-processing device C. As shown in FIG. The post-processing apparatus C is provided with a post-processing path 38 connected to the cover conveying path 34 . At least one post-processing device such as a stapling unit, a punching unit, a stamping unit, etc. is arranged in the post-processing path 38 . The post-processing path 38 receives the image-formed sheet from the image forming apparatus A via the cover transport path 34 . The post-processing apparatus C performs at least one post-processing such as stapling, punching, and stamping on the received sheets on which images have been formed. Then, the post-processing apparatus C carries out the image-formed sheet to the discharge tray 37 . Note that the post-processing device C is configured to be able to discharge the image-formed sheet to the discharge tray 37 without performing post-processing.

[Collecting unit 40]
A stacking tray 41 arranged at the middle sheet discharge port 32b of the middle sheet conveying path 32 stacks and stores the middle sheets from the middle sheet discharge port 32b in a bundle. As shown in FIG. 2, the stacking tray 41 is composed of a tray member arranged substantially horizontally, and a forward/reverse roller 42a and a carry-in guide 42b are arranged above. The medium sheet discharged from the medium sheet discharge port 32b is guided onto the stacking tray 41 by the carry-in guide 42b, and stored in the stacking tray 41 by the reversible rollers 42a. The forward/reverse roller 42a forwardly rotates to transfer the middle sheet to the leading end of the stacking tray 41, and reversely rotates to abut the rear end of the middle sheet against the regulation member 43 arranged at the tray rear end (right end in FIG. 2). regulate. The stacking tray 41 is provided with a pair of sheet side aligning plates (not shown), and the sheet side aligning plates align both side edges of the middle sheets stored on the stacking tray 41 . With such a configuration, the middle sheets from the middle sheet conveying path 32 are sequentially stacked on the stacking tray 41 and arranged in a bundle.

[Grip transport unit 47]
The bookbinding path 33 is provided with a grip conveying section 47 that conveys sheets from the stacking tray 41 to the adhesive application position E on the downstream side. The stacking tray 41 delivers the middle sheet bundle to a grip conveying section 47 waiting at a substantially horizontal delivery position. As shown in FIG. 2, the grip conveying unit 47 changes the orientation of the middle sheet bundle accumulated on the accumulation tray 41 from a substantially horizontal posture to a vertical posture, and transfers it to the bookbinding path 33 arranged in a substantially vertical direction. set at the adhesive application position E.

[Adhesive application unit 55]
FIG. 3 is a diagram of the adhesive application unit 55. As shown in FIG. FIG. 3(a) is a front view. FIG.3(b) is a J arrow directional view of (a). 2 and 3, an adhesive application section 55 is arranged at the adhesive application position E of the bookbinding path 33. As shown in FIG. The adhesive application unit 55 is composed of an adhesive container 56 containing a hot-melt adhesive, an application roll 57, a roll rotation motor MR, and the like. The adhesive container 56 is divided into a liquid adhesive storage chamber 56a and a solid adhesive storage chamber 56b. A coating roll 57 is rotatably incorporated in the liquid adhesive storage chamber 56a. The liquid adhesive storage chamber 56a is provided with an adhesive sensor 56s (see FIG. 2) for detecting the remaining amount of adhesive. The adhesive sensor 56s also serves as an adhesive temperature sensor. That is, the adhesive sensor 56s detects the temperature of the liquefied adhesive in the liquid adhesive storage chamber 56a, and at the same time, detects the remaining amount of adhesive based on the temperature difference between the parts immersed in the adhesive. Further, the adhesive container 56 is provided with a heating element 50 such as an electric heater. The adhesive sensor 56s and the heating element 50 are connected to the bookbinding device controller 102 (see FIGS. 1 and 14). The bookbinding device control unit 102 adjusts the temperature of the adhesive in the liquid adhesive storage chamber 56 a to a predetermined melting temperature based on the temperature detected by the heating element 50 . The coating roll 57 is made of a heat-resistant porous material, and is impregnated with an adhesive so that a layer of the adhesive rises around the roll.

The adhesive container 56 configured as described above is driven to reciprocate along the back side of the middle sheet bundle. As shown in FIG. 3(b), the adhesive container 56 is formed to have a length (dimension) shorter than the lower edge of the middle sheet bundle (back cover portion at the time of bookbinding) P1B. The adhesive container 56 is supported by the guide rails 52 of the casing 30 so as to move along the lower edge P1B of the middle sheet bundle P1 together with the built-in application roll 57. As shown in FIG. The adhesive container 56 is connected to the timing belt 53 . The timing belt 53 is connected with an adhesive container moving motor MS.

The adhesive container 56 is guided by the guide rail 52 between a home position HP on the left side in FIG. 3B and a return position RP on the right side in FIG. and is reciprocated by an adhesive container moving motor MS. The return position RP is set by the sheet width size information. The home position HP of the adhesive container 56 is detected by the home position sensor SP. The adhesive container 56 is on standby at the home position HP when the apparatus is powered on (initialized). For example, the adhesive container 56 reaches the home position after a predetermined time (expected time for the sheet bundle to reach the adhesive application position E) from the output of the sheet grip signal from the grip sensor Sg (see FIG. 2) provided in the grip conveying section 47. Move from HP to return position RP. The position of the adhesive container 56 can be detected by counting drive pulses of the adhesive container moving motor MS. As shown in FIG. 3B, an overrun sensor OP may be provided at the return position RP of the adhesive container 56 to prevent overrun by detection of the overrun sensor OP. good.

The application roll 57 starts rotating by the roll rotation motor MR simultaneously with the movement of the adhesive container 56 from the home position HP to the return position RP. The adhesive application unit 55 configured as described above starts to move from the left side to the right side in FIG. The coating roll 57 presses against the sheet bundle and separates the ends of the sheet bundle in the outward path from the left side to the right side in FIG. 3(b). The application roll 57 adjusts the feeding amount of the grip conveying section 47 so that the adhesive is applied while forming a predetermined gap with the end portion of the sheet bundle on the return path from the return position RP to the home position HP. It is adjusted by an elevation motor (not shown).

[Cover binding unit 60]
FIG. 4 is a diagram showing the cover sheet binding section 60, the bundle attitude deflection section 64, the cutting section 65, and the sheet bundle discharging device K. As shown in FIG. At the cover binding position F of the bookbinding path 33, a cover binding section 60 is arranged as binding means. The cover binding unit 60 is composed of a back plate 61, a back folding plate 62, a pair of folding rollers 63, and the like. A cover feeding path 34 is arranged at the cover binding position F, and a cover is fed from the image forming apparatus A or the inserter device 26 . The backing plate 61 is composed of a plate-like member that backs up the cover, and is arranged in the bookbinding path 33 so as to be able to move back and forth. The middle sheet bundle P1 mounted on the cover P2 supported by the back support plate 61 is joined in an inverted T shape. The spine folding plate 62 is composed of a pair of left and right pressing members, and is brought closer to and away from each other by a driving unit (not shown) in order to fold the spine of the cover sheet joined in an inverted T shape. The spine folding plates 62 approach each other to fold the spine of the cover sheet P2. The pair of folding rollers 63 pinches and presses the cover-attached sheet bundle P3 formed by back-folding the cover P2 to finish the cover.

[Bundle Posture Deflection Unit 64 and Cutting Unit 65]
As shown in FIG. 4, downstream of the pair of folding rollers 63, a bundle attitude deflection section 64 is arranged to deflect the cover-attached sheet bundle in the vertical direction. A trimming unit 65 for trimming the peripheral edge of the sheet stack with cover sheet is provided at a trimming position G downstream of the stack attitude deflection unit 64 . The bundle attitude deflection unit 64 deflects the cover sheet bundle P3 from the adhesive application position E (see FIG. 2) in a predetermined direction (attitude) and feeds it to the cutting unit 65 or the sheet bundle discharge device K on the downstream side. The trimming unit 65 trims the peripheral edges of the cover-attached sheet bundle to be trimmed. For this reason, the bundle orientation deflector 64 includes rotary tables 64a and 64b that hold and rotate the sheet bundle P3 with the cover sheet sent from the folding roller pair 63. As shown in FIG. The rotary tables 64a and 64b are provided on a unit frame 64x which is attached to the casing 30 (see FIG. 2) so as to be movable up and down. A pair of rotary tables 64a and 64b are rotatably supported by bearings on the unit frame 64x with the bookbinding path 33 interposed therebetween. One rotary table 64b is supported by a unit frame 64x so as to be movable in the thickness direction of the cover-attached sheet bundle P3 (the direction orthogonal to the bookbinding path 33). Rotating motors Mt1 and Mt2 that deflect the sheet stack P3 with the cover in the bookbinding path 33 are provided on the rotary tables 64a and 64b, respectively. Further, the rotary table 64b on the movable side is equipped with a grip motor Mg that moves in the horizontal direction in FIG. The unit frame 64x raises and lowers the cover-attached sheet bundle P3 along the bookbinding path 33 by an elevation motor MA. The lifting motor MA is fixed to a fixing member (not shown). The lift motor MA circulates the belt 67 connected to the unit frame 64x to lift the unit frame 64x.

The cover-attached sheet bundle P3 guided into the bookbinding path 33 is gripped by a pair of left and right rotary tables 64a and 64b, and is deflected in the attitude direction by turning motors Mt1 and Mt2. The rotary tables 64a and 64b turn the sheet bundle P3 with the cover sheet carried in with the spine down by 180 degrees, and send it to the sheet bundle discharge roller pair 66 on the downstream side with the fore edge down. Further, the rotary tables 64a and 64b sequentially rotate the cover-attached sheet bundle P3 by 90 degrees to deflect the top portion, the bottom portion, and the edge portion downward to the cutting position G on the downstream side, thereby cutting the cover-attached sheet bundle P3. It is also possible to perform a trimming cut for trimming the peripheral edges of the three sides. A grip sensor (not shown) is provided on the rotary table 64b on the movable side. The turntables 64a and 64b are rotated after the grip sensor detects that the cover sheet bundle P3 is securely gripped between the left and right turntables 64a and 64b.

[Cutting section 65]
As shown in FIG. 4 , a cutting section 65 is arranged downstream of the bundle attitude deflection section 64 . The cutting unit 65 is composed of a blade receiving member 65a, a cutting edge press unit 65b that presses and supports the cutting edge of the cover-attached sheet bundle P3 against the blade receiving member 65a, a cutting blade unit 65c that cuts the cutting edge, and the like. ing. The cutting edge press unit 65b is arranged at a position facing the blade receiving member 65a arranged on the bookbinding path 33. As shown in FIG. The trimming edge press unit 65b has a pressurizing member 65d that is moved in a direction orthogonal to the cover-attached sheet bundle P3 by a drive section (not shown). The cutting blade unit 65c is composed of a flat cutting blade 65e, a cutter motor MC for driving the cutting blade 65e, and the like. The trimming section 65 configured in this manner trims and trims the peripheral edge (edge to be trimmed) of the sheet bundle P3 with the cover sheet excluding the spine portion by a predetermined amount.

[Sheet bundle discharge device K]
As shown in FIG. 4, the sheet bundle discharging device K is disposed below the cutting position G and is composed of a cutting waste collection section K1, a sheet bundle discharging section K2, and the like.

[Cutting waste collection unit K1]
In FIG. 4, the cutting waste collection unit K1 is composed of a sweeper unit 69, a cutting waste collection container 68, a full detection sensor 68Sf, a near full detection sensor 68Sn, etc., and collects the cutting waste cut by the cutting blade 65e. store.

The sweeper section 69 is arranged directly below the cutting position G. As shown in FIG. The sweeper section 69 rotates between the position indicated by the solid line and the position indicated by the broken line in FIG. 4 by a drive motor (not shown). The sweeper section 69 stands by at a tilted position indicated by the solid line where it can receive the trimming waste generated by the trimming when the trimming section 65 trims the edge to be trimmed of the cover sheet bundle. As shown in FIG. 2, the sweeper portion 69 and an ejection guide 71, which will be described later, are formed in a comb shape so that they do not interfere with each other when the sweeper portion 69 rotates.

The sweeper unit 69 standing by at the position indicated by the solid line receives the cutting waste generated in the cutting unit 65 and falling through the pair of sheet bundle discharge rollers 66, and guides it to the cutting waste collection container 68 using the inclination. . At this time, the cover-attached sheet bundle P3 is held by the rotary tables 64a and 64b in the cutting section 65, so that it does not drop. When the trimming unit 65 completes the trimming of the sheet bundle with the cover, the sweeper unit 69 rotates to a position indicated by a dashed line near the trim waste collection container 68 , avoiding directly below the sheet stack discharge roller pair 66 . As a result, the sweeper section 69 is released from the holding by the rotary tables 64 a and 64 b and does not interfere with the fall of the booklet discharged from the sheet bundle discharge roller pair 66 . The booklet P4 (see FIG. 5) whose peripheral edges excluding the back portion have been cut by the cutting section 65 falls to the sheet bundle discharging section K2.

When a certain amount of cutting waste is collected in the cutting waste collection container 68, the near-full detection sensor 68Sn detects that the cutting waste collection container 68 is about to become full. When the near-full detection sensor 68Sn detects that the near-full detection sensor 68Sn is about to become full, the bookbinding apparatus control section 102 (see FIG. 14) notifies the image forming apparatus control section 101 (see FIG. 14) that the cutting waste collecting container 68 is about to become full. Let The image forming apparatus control section 101 displays on the operation panel 18 (see FIGS. 1 and 14) of the image forming apparatus A that the cutting waste is almost full. The near-full detection sensor 68Sn keeps the cutting waste collection container 68 in a state capable of containing cutting waste equivalent to one time of cutting the peripheral edge of the cover-attached sheet bundle so as not to become full while the cover-attached sheet bundle is being trimmed. is positioned to detect when the is about to fill up. The full detection sensor 68Sf detects when the cutting waste collection container 68 is full of cutting waste. When the full detection sensor 68Sf detects that the cutting waste collection container 68 is full, the bookbinding device control unit 102 notifies the image forming device control unit 101 that the cutting waste collection container 68 is full. The image forming apparatus control unit 101 displays on the operation panel 18 that the cutting waste is full, and also displays a prompt to discard the cutting waste.

[Sheet bundle discharge unit K2]
FIG. 5 is a schematic diagram of the sheet bundle discharge device K, showing the backrest 81 standing by at a position for receiving the booklet P4. FIG. 6 is a perspective view of the area including the backrest 81. FIG. In FIG. 5, the sheet bundle discharge portion K2 is arranged below (downstream in the conveying direction) the sheet bundle discharge roller pair 66 as the conveying means and the discharge guide 71 as the guide means. The sheet bundle discharge portion K2 includes a slope 72 on which the booklet P4 conveyed from the sheet bundle discharge roller pair 66 and the discharge guide 71 slides, and a spine on which the booklet P4 is conveyed via the discharge guide 71 and the slope 72. A receiving unit 80 is provided. The spine receiving unit 80, which is guided by the ejection guide 71 so that the spine of the booklet P4 is at the front, receives the transported booklet P4, rotates, and knocks down the booklet P4, is the receiving means (receiving means) in this embodiment. ).

As shown in FIG. 5, in the backrest unit 80, the backrest 81 is rotatably held along the groove of the backrest rail 82, and the backrest 81 is positioned at the booklet receiving position (standby position). It is configured to be able to receive the booklet P4 when the

As shown in FIG. 6, the backrest unit 80 is provided with a backrest home position sensor SHP for detecting whether or not the backrest 81 is positioned at the booklet receiving position. Further, the backrest unit 80 is provided with a slope sensor SS capable of detecting that the booklet P4 has been handed over to the backrest 81 .

Further, as shown in FIG. 6, a projecting plate 73 is provided in the sheet bundle discharge portion K2. The projecting plate 73 can push the booklet P4 received by the backrest 81 by being driven by the projecting plate drive unit 74 . The position where the projecting plate 73 pushes the booklet is upstream of the backrest unit 80 in the conveying direction. The position of the projecting plate 73 is determined by a projecting plate home position sensor STH and a tilted position detection sensor STT shown in FIG. The projecting plate home position sensor STH detects that the projecting plate 73 is at the home position (retracted position). The tilted position detection sensor STT detects that the projecting plate 73 is at the tilted position. The tilting position is the position when the projecting plate 73 executes the operation of tilting the booklet P4. The projecting plate 73 and the projecting plate driving portion 74 constitute the tilting means in this embodiment.

[Details of back cover]
FIG. 7 is a schematic diagram showing the backrest 81. As shown in FIG. As shown in FIG. 7, the backrest 81 is composed of a backrest base 83, a backrest guide 84, and a backrest sheet 85. As shown in FIG. The backrest base 83 is a member extending in the J1 direction. The backrest guides 84 are arranged side by side in the J1 direction so as to cover the outer peripheral side of the backrest base 83 . The backrest sheet 85 is attached to the backrest base 83 . The length of the back sheet 85 in the J1 direction is configured to be longer than the length from the top to the bottom of the maximum size booklet that can be produced by the bookbinding apparatus B (see FIGS. 1 and 2).

FIG. 8 is a side view of the backrest 81 at the booklet receiving position. FIG. 8 shows an approaching direction J2, which is the moving direction when the booklet P4 approaches the backrest 81 in the ejection operation of the booklet P4, which will be described later. FIG. 8 also shows a separating direction J3, which is a moving direction when the booklet P4 separates from the backrest 81 in the later-described ejecting operation of the booklet P4.

The backrest 81 is configured to include three surfaces, a first surface, a second surface and a third surface. The backrest base 83 includes a backrest upper guide 83a, a backrest lower guide 83b, and a backrest bottom plate 83c. The backrest bottom plate 83c as the first portion forms the first surface, and the backrest lower guide 83b as the second portion forms the second surface and is attached to the backrest upper guide 83a as the third portion. The surface of the backing sheet 85 which has been folded forms a third surface. In this embodiment, the backrest base 83 is made of sheet metal, and a backrest lower guide 83b and a backrest upper guide 83a protrude in the same direction from both ends of a backrest bottom plate 83c.

The back support bottom plate 83c forms a first surface. The first surface is a portion that comes into contact with the spine P4A (see FIG. 9) of the booklet P4 moving in the approaching direction J2, which is the direction approaching the backrest bottom plate 83c, when the backrest 81 is at the booklet receiving position.

The lower backrest guide 83b forms the second surface. The second surface is formed substantially perpendicular to the back support bottom plate 83c. The second surface formed by the backrest lower guide 83b is a portion that can slide with the booklet P4 moving in the approaching direction J2 before the booklet contacts the first surface when the backrest 81 is in the booklet receiving position. is. Further, the end portion of the second surface is positioned in the direction of rotation of the backrest 81 while the backrest 81 is rotated from the booklet receiving position (first position) to the booklet ejection position (second position). Press P4.

The backrest upper guide 83a is formed substantially perpendicular to the backrest bottom plate 83c so as to face the backrest lower guide 83b. The back support sheet 85 attached to the back support upper guide 83a forms the third surface. The third surface of the backrest 81 rotates from the booklet receiving position (first position) to the booklet ejection position (second position) in the rotation direction (rotational direction) of the backrest 81. restrict the movement of

As shown in FIG. 8, the backrest sheet 85 as a friction member is arranged so as to cover the backrest upper guide 83a with an inner cover portion 85a and an outer cover portion 85b. The backrest sheet 85 is fixed by attaching the inner cover portion 85a to the backrest upper guide 83a and sandwiching the outer cover portion 85b between the backrest upper guide 83a and the backrest guide 84. As shown in FIG. By assembling the back support sheet 85 in this manner, the back support sheet 85 is less likely to come off from the back support upper guide 83a. A back support upper guide 83a that supports a back support sheet 85 as a seat constitutes a support member.

The direction in which the booklet P4 moves while contacting the inner cover portion 85a of the back sheet 85 and the coefficient of friction will be described. The coefficient of friction between the back support sheet 85 and the booklet P4 in the approaching direction J2 is assumed to be a coefficient of friction μJ2. The coefficient of friction between the back receiving sheet 85 and the booklet P4 in the separating direction J3, which is the direction away from the back receiving bottom plate 83c, is defined as a friction coefficient μJ3.

It is desirable that the coefficient of friction μJ2 be a small value. This is because even if the booklet P4 entering the backrest 81 comes into contact with the inner cover portion 85a, the insertion of the booklet P4 is not hindered. On the other hand, it is desirable that the coefficient of friction μJ3 is a large value. This is because the frictional force prevents the booklet P4 from moving from the backrest 81 in the separation direction J3. The sheet bundle discharge unit K2 can stably discharge the booklet P4 by suppressing the movement of the booklet P4 in the separation direction J3 in the later-described discharge operation of the booklet P4. The coefficient of friction μJ3 should be at least greater than the coefficient of friction between the backrest bottom plate 83c and the booklet P4 and the coefficient of friction between the backrest lower guide 83b and the spine P4A of the booklet (see FIG. 9B).

In this embodiment, the backrest sheet 85 is constructed so that the coefficient of friction μJ2 and the coefficient of friction μJ3 are different. Specifically, a flocked sheet is used as the back sheet 85 . The flocked sheet has a small coefficient of friction in the forward direction corresponding to the direction of flocking, and a large coefficient of friction in the direction opposite to the direction of flocking. Therefore, on the back sheet 85, the flocked sheet is placed so that the direction in which the hairs of the flocked sheet extend coincides with the approaching direction J2.

In addition, in the inner cover portion 85a, the coefficient of friction μJ2 and the coefficient of friction μJ3 do not necessarily have to be different. That is, the friction coefficient μJ2 and the friction coefficient μJ3 may be the same value. The reason for this is that if the possibility of contact between the booklet P4 moving in the approaching direction J2 and the inner cover portion 85a is low, the effect is small.

[Details of booklet ejection operation]
FIG. 9A is a schematic diagram showing a state in which the backrest 81 receives the booklet P4. FIG. 9(b) is an enlarged view of the backrest 81 shown in FIG. 9(a) in a state in which the booklet P4 is received by the backrest 81. FIG. The booklet P4 conveyed to the sheet bundle discharge portion K2 slides on the sloped surface 72a of the slope 72 when the backrest home position sensor SHP detects that the backrest 81 is positioned at the booklet receiving position. Then, it is conveyed to the backrest unit 80 . The booklet P4 conveyed toward the backrest unit 80 is stopped when the spine P4A, which is the downstream end in the conveying direction, contacts the backrest 81. As shown in FIG.

As shown in FIG. 9B, the back support lower guide 83b is arranged at a position substantially parallel to the sloped surface 72a and not protruding toward the booklet side at the booklet receiving position. With this configuration, the booklet P4 can be smoothly inserted into the backrest 81 . Further, since the backrest bottom plate 83c and the backrest bottom guide 83b are substantially perpendicular, the posture of the booklet P4 is stabilized with the spine P4A of the booklet P4 in contact with the backrest bottom plate 83c.

When the booklet P4 is inserted into the backrest 81, it may come into contact with the backrest lower guide 83b. In the sheet bundle discharge portion K2, when the booklet P4 contacts the backrest lower guide 83b, the booklet P4 is less likely to be inserted into the backrest 81 if the coefficient of friction between the booklet P4 and the backrest lower guide 83b is large. Therefore, in this embodiment, the surface of the backrest base 83 made of sheet metal is exposed to reduce the coefficient of friction.

The backrest bottom plate 83c is structured such that the surface of the backrest base 83 is exposed, similar to the backrest lower guide 83b.

Thus, in the backrest 81 of the present embodiment, the backrest upper guide 83a to which the inner cover portion 85a of the backrest sheet 85 is attached, the backrest lower guide 83b, and the backrest bottom plate 83c have different coefficients of friction. is configured to have a surface of

Further, the distance between the backrest upper guide 83a and the backrest lower guide 83b is wider than the maximum thickness of the booklet that the bookbinding apparatus B can bind. Therefore, even the thickest booklet can be inserted into the backrest 81 .

[Change the posture of the booklet]
A slope sensor SS (see FIG. 6) detects that the booklet P4 has been inserted into the backrest 81 . After the booklet P4 is inserted into the backrest 81, the bookbinding device control unit 102 (see FIG. 14) drives the ejection motor MT (see FIG. 14) connected to the backrest 81 by a drive train (not shown) at a predetermined speed. Forward rotation is driven to rotate the backrest 81 counterclockwise. The bookbinding device control unit 102 controls the ejection motor MT by motor pulse control.

FIG. 10(a) is a schematic diagram showing a state in which the backrest 81 is rotated counterclockwise by a predetermined angle by the ejection motor MT. FIG. 10(b) is an enlarged view of the backrest 81 shown in FIG. 10(a) in a state in which the backrest 81 is rotated counterclockwise by a predetermined angle. As shown in FIG. 10(a), the posture of the booklet P4 inserted into the backrest 81 is curved by rotating the backrest 81 by a predetermined angle. At this time, as shown in FIG. 10B, the backrest 81 pushes the booklet P4 with the end portion W of the backrest lower guide 83b to bend the booklet P4. Then, the back support sheet 85 attached to the back support upper guide 83a and the booklet P4 are brought into contact with each other. Then, a frictional force is generated that prevents the movement of the booklet P4 in the J3 direction shown in FIG. 10(b). As described above, the friction force acting between the back support sheet 85 and the booklet P4 moving in the J3 direction is generated according to the friction coefficient μJ3. This frictional force prevents the booklet P4 from coming off from the backrest 81 while the backrest 81 is rotating.

The bookbinding device control unit 102 drives the projecting plate driving unit 74 in synchronization with the rotation of the backrest 81 to move the projecting plate 73 in the A1 direction in FIG. 10(a). The projecting plate 73 pushes down the booklet P4 by contacting and pushing the booklet P4. The bookbinding device control unit 102 moves the projecting plate 73 to a position for tilting the booklet P4 while rotating the backrest 81 to a position for ejecting the booklet P4.

In the sheet bundle discharge portion K2, the surface of the back support bottom plate 83c is desirably smooth so that the booklet P4 and the back support sheet 85 are easily brought into contact when the back support 81 is rotated. In this embodiment, the surface of the sheet metal is exposed.

FIG. 11 is a diagram showing a state in which the rotation of the backrest 81 and the thrusting action of the projecting plate 73 are completed, and the booklet P4 is placed on the belt conveyor 90. As shown in FIG. By the rotation of the backrest 81 and the movement of the projecting plate 73, the booklet P4 is placed on a belt conveyor 90 as a discharge means.

The backrest 81 stops in a state of being rotated to the booklet ejection position shown in FIG. At the booklet ejection position, the backrest upper guide 83a is substantially parallel to the placement surface of the transport belt 92 on which the booklet P4 is placed. Also, at this time, the back support upper guide 83a to which the back support sheet 85 is attached is positioned so as not to protrude to the surface side of the carrying surface of the conveying belt 92. As shown in FIG.

That is, when the backrest 81 is rotated to the booklet ejection position, a gap exists between the backrest upper guide 83a and the booklet P4 placed on the belt conveyor 90. FIG. Therefore, the back receiving sheet 85 of the back support 81 at the booklet ejection position does not come into contact with the booklet P4 placed on the belt conveyor 90 . When the transport belt 92 is driven to eject the booklet P4, the booklet P4 and the back support sheet 85 do not come into contact with each other.

The belt conveyor 90 is constructed by putting a conveyor belt 92 on a conveyor stay 91 . The belt conveyor 90 is installed at a predetermined angle so that the back P4A side of the placed booklet P4 faces downward. In other words, the belt conveyor 90 is installed so that the backrest unit 80 faces downward. Due to this inclination, when the booklet P4 is laid down and placed on the belt conveyor 90 in the sheet bundle discharge section K2, it is possible to suppress the deviation of the booklet P4 in the direction in which the booklet P4 is laid down.

[Exporting the booklet outside the machine]
FIG. 12 is a diagram showing a state in which the booklet P4 is placed on the belt conveyor 90. As shown in FIG. As described above, the belt conveyor 90 includes a conveyor stay 91, a conveyor belt 92 that conveys the placed booklet P4, and an ejection detector 93 that detects whether or not the booklet P4 has been carried out of the apparatus. Configured. The conveying belt 92 is connected to a discharge motor MT by a drive train (not shown), and rotates in a direction (discharging direction) in which the booklet P4 is discharged to the outside of the sheet bundle discharge device K by the reverse rotation of the discharge motor MT. be done.

Here, when the booklet P4 is put down and placed on the belt conveyor 90 while the transport belt 92 is rotating, the booklet P4 comes into contact with the transport belt 92 that is moving. As a result, the booklet P4 on the belt conveyor 90 is placed in an inclined posture with respect to the traveling direction of the conveyor belt 92 . If the booklet P4 is placed with an excessive inclination, the ejection detection unit 93 may not be able to detect the ejection of the booklet P4. Therefore, as shown in FIG. 12, the bookbinding device control unit 102 lays down the booklet P4 while the conveying belt 92 is stopped. After the booklet P4 is placed on the belt conveyor 90, the bookbinding device control section 102 rotates the conveying belt 92 to discharge the booklet P4 out of the machine as shown in FIG.

The bookbinding device control section 102 detects that the booklet P4 has been discharged to the outside of the machine by the discharge detection section 93 . When the booklet P4 is discharged out of the machine, the bookbinding device control section 102 stops the rotation of the conveying belt 92 . After that, the bookbinding device control unit 102 returns the position of the backrest 81 to the booklet receiving position, and moves the projecting plate 73 to the retracted position. At this point, the series of operations related to carrying out the booklet P4 out of the machine is completed, and preparations for receiving the succeeding booklet are completed. Then, when there is a booklet to be conveyed next, the operation of each configuration described above is executed again. As described above, the bookbinding apparatus B of this embodiment can continuously discharge booklets to the outside.

The configuration of the backrest 81 in this embodiment will be summarized. The backrest 81 has a first surface formed by the backrest bottom plate 83c, a second surface formed by the backrest lower guide 83b, and a backrest sheet 85 as a friction member attached to the backrest upper guide 83a. and a third surface that In order to stably eject the booklet P4, the coefficient of friction μJ3 between the back support sheet 85 and the booklet P4 in the separation direction J3 should be large. Also, in order not to affect the movement of the booklet P4 to the backrest 81, the coefficient of friction μJ2 between the backrest sheet 85 and the booklet P4 in the approaching direction J2 should be small. The coefficient of friction between the back support bottom plate 83c and the booklet P4 should be small. This is to make it easier to move the back portion P4A of the booklet P4 when the backrest 81 is rotated, and bring the booklet P4 into contact with the backrest sheet 85 to stably lay down the booklet P4.

With such a configuration, the bookbinding apparatus B (see FIGS. 1 and 2) of the present embodiment can realize continuous bookbinding and unloading. As a result, the bookbinding apparatus B can independently operate the bookbinding system even when printing a large number of bookbinding bundles under the same conditions. Further, the bookbinding apparatus B of the present embodiment lays down the booklet P4 before the belt conveyor 90 carries the booklet P4 out of the apparatus. Therefore, compared to a structure in which the booklet P4 is transported from an upright position to a folded position, the transport path of the booklet P4 can be shortened, so that the size of the apparatus can be reduced.

[Control block diagram]
FIG. 14 is a control block diagram of the image forming system in this embodiment. As shown in FIG. 14, the image forming apparatus control section 101 is provided in the image forming apparatus A. As shown in FIG. The image forming apparatus control unit 101 controls the sheet feeding unit 2, the image forming unit 3, the document feeder 25, the scanner unit 20, etc. based on the image forming information input by the user to the operation panel 18, and the image forming apparatus A image forming operation. The bookbinding device control unit 102 is provided in the bookbinding device B. FIG. The bookbinding apparatus control unit 102 controls the rotation of each motor based on the detection operation of each sensor to control the stacking unit 40, the adhesive application unit 55, the display binding unit 60, the cutting unit 65, the sheet bundle discharge device K, and the like. The bookbinding apparatus B is caused to perform a bookbinding operation. A post-processing apparatus control unit 103 is provided in the post-processing apparatus C, and controls the post-processing apparatus C so as to perform at least one post-processing such as stapling, punching, and stamping on sheets on which images have been formed. . Note that the image forming apparatus control section 101, the bookbinding apparatus control section 102, and the post-processing apparatus control section 103 may be integrated and provided anywhere in the image forming system D. FIG. Further, the operation panel 18 may be connected to the bookbinding device control section 102, or may be provided in the bookbinding device B or the sheet bundle discharging device K. FIG. The operation panel 18 constitutes a display section capable of displaying information in this embodiment.

As described above, in the sheet bundle discharge device K of the present embodiment, the coefficient of friction between the booklet P4 and the backrest sheet 85 attached to the surface of the backrest upper guide 83a is equal to or greater than the booklet P4 and the backrest bottom plate 83c. higher than the coefficient of friction between Therefore, the sheet bundle discharging device K can improve the stability of the operation when the booklet P4 is tilted from the backrest 81 toward the belt conveyor 90 .

[Modification]
In the present embodiment, the backrest 81 has the backrest upper guide 83a and the backrest lower guide 83b surface friction coefficient and the backrest bottom plate 83c surface friction coefficient are reduced by attaching the backrest sheet 85 to the surface of the backrest upper guide 83a. It has a higher coefficient of friction than, but is not limited to. The surface of the backrest upper guide 83a is processed into grooves, or the surface of the backrest upper guide 83a is roughened with a chemical or the like to make the surface satin-like. The coefficient of friction may be higher than that of the surface of the back support bottom plate 83c. In this configuration, the surface of the back support upper guide 83a constitutes the third surface.

In addition, in the present embodiment, the backrest 81 has three surfaces, the backrest upper guide 83a, the backrest lower guide 83b, and the backrest bottom plate 83c, but is not limited to this. The backrest 81 has two surfaces, for example, a backrest lower guide 83b and a surface connected substantially perpendicularly to the backrest lower guide 83b at one end and curved and having the other end substantially parallel to the backrest lower guide 83b. It may be a configuration having.

In the present embodiment, the backrest 81 has the backrest upper guide 83a and the backrest sheet 85 attached to the surface of the backrest upper guide 83a. You can install the parts. In the sheet bundle discharge portion K2, when an elastic member is installed between the backrest upper guide 83a and the backrest sheet 85, when the backrest 81 is rotated to lay down the booklet P4, the booklet P4 on the backrest sheet 85 is pushed down. is deformed at the contacting part. The deformation of the back sheet 85 facilitates close contact between the back sheet 85 and the booklet P4. The backrest 81 makes it difficult for the booklet P4 to come off from the backrest 81 when the booklet P4 is laid down. Note that the backrest sheet 85 itself may be made of a material that is elastically deformable.

In this embodiment, the sheet bundle discharging device K is configured to tilt the booklet P4 by synchronizing the backrest 81 of the backrest unit 80 and the projecting plate 73. It may be configured to defeat P4. Further, the sheet bundle discharge device K may have a configuration in which the fore edge side of the booklet P4 is gripped by a gripper and laid down.

K... Sheet bundle ejection device: P4... Booklet (sheet bundle): P4A... Back (back): 71... Ejection guide (guide means): 80... Back support unit (receiving means): 83a... Back support upper guide (third Surface, support member): 83b Back support lower guide (second surface): 83c Back support bottom plate (first surface): 85 Back support sheet (friction member, sheet, third surface): 85a Inner cover part (Third surface): 90... Belt conveyor (discharging means)

Claims (6)

A sheet bundle discharging device for discharging a sheet bundle including a spine,
a conveying means for conveying the sheet bundle;
guide means for guiding the sheet bundle conveyed by the conveying means so that the spine is at the front;
a conveying belt that conveys the sheet bundle to the outside of the sheet bundle discharging device;
receiving means for receiving the spine of the sheet bundle guided by the guide means, the first position receiving the spine of the sheet bundle away from the conveying belt; a receiving means rotatable between a second placement position ;
attitude changing means for rotating the receiving means from the first position to the second position ;
The fore edge of the sheet bundle is shifted in the belt width direction of the conveyor belt by rotating the receiving means from the first position to the second position by the attitude changing means. move through the area,
The receiving means
a first surface with which the spine abuts when receiving the spine of the sheet bundle at the first position;
The spine is slidable on the stack of sheets before coming into contact with the first surface, and the receiving means rotates while the receiving means rotates from the first position to the second position. a second surface that pushes the stack of sheets in a direction;
is arranged to face the second surface, and restricts the movement of the sheet bundle in the rotation direction of the receiving means while the receiving means is rotated from the first position to the second position; a third surface;
The third surface is provided with a flocked sheet flocked with hairs extending in a direction approaching the first surface, and a coefficient of friction between the sheet bundle and the third surface in a direction away from the first surface. is greater than the coefficient of friction between the first surface and the stack of sheets;
A sheet bundle discharge device characterized by: The second surface and the third surface are formed substantially perpendicular to the first surface,
2. The sheet bundle discharging device according to claim 1, wherein: On the third surface, the coefficient of friction between the sheet bundle and the third surface in the direction away from the first surface is greater than the coefficient of friction between the third surface,
3. The sheet bundle discharging device according to claim 1, wherein: a coefficient of friction between the stack of sheets and the third surface in a direction approaching the first surface is greater than the coefficient of friction between the first surface and the stack of sheets;
4. The sheet bundle discharge device according to any one of claims 1 to 3, characterized in that: When the receiving means is at the second position, a gap exists between the third surface of the receiving means and the sheet bundle placed on the conveying belt .
5. The sheet bundle discharge device according to any one of claims 1 to 4, characterized in that: A sheet bundle discharging device for discharging a sheet bundle including a spine,
a conveying means for conveying the sheet bundle;
guide means for guiding the sheet bundle conveyed by the conveying means so that the spine is at the front;
a conveying belt that conveys the sheet bundle to the outside of the sheet bundle discharging device;
receiving means for receiving the spine of the sheet bundle guided by the guide means, the first position receiving the spine of the sheet bundle away from the conveying belt; a receiving means rotatable between a second placement position;
attitude changing means for rotating the receiving means from the first position to the second position;
The fore edge of the sheet bundle is shifted in the belt width direction of the conveyor belt by rotating the receiving means from the first position to the second position by the attitude changing means. move through the area,
The receiving means
a first surface with which the spine abuts when receiving the spine of the sheet bundle at the first position;
The spine is slidable on the stack of sheets before coming into contact with the first surface, and the receiving means rotates while the receiving means rotates from the first position to the second position. a second surface that pushes the stack of sheets in a direction;
is arranged to face the second surface, and restricts the movement of the sheet bundle in the rotation direction of the receiving means while the receiving means is rotated from the first position to the second position; a third surface;
The third surface is provided with a flocked sheet flocked with hairs extending in a direction approaching the first surface, and a coefficient of friction between the sheet bundle and the third surface in a direction away from the first surface. is greater than the coefficient of friction between the second surface and the stack of sheets,
A sheet bundle discharge device characterized by:

Images