JP6183740B2 - Paper post-processing device - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet post-processing apparatus that is connected to an image forming apparatus such as a copying machine or a printer and performs a stapling process that binds an image-formed sheet without using a binding needle.

  Image forming apparatuses such as copiers and printers have become multifunctional, and image forming apparatuses that include a storage device that stores a large amount of images and that form an image for each unit have become mainstream. Along with the increase in functionality, an image forming apparatus including a sheet post-processing device that performs post-processing such as stippling processing on a recorded and output sheet has appeared (see Patent Documents 1 to 4).

  In such a conventional paper post-processing apparatus, in general, when performing a stapling process, a metal binding needle (staple needle) is driven into a plurality of sheets to be bound, and the metal binding needle is used. It binds multiple sheets by itself.

  However, if the stapling process is performed using a metal binding needle, the binding needle becomes a consumable item, which increases the cost of the consumable item, and the trouble of removing the binding needle when applying the stapled paper to the shredder. As a result, not only is the workability poor, but if the paper is applied to the shredder without removing the binding needle, there is a problem that the shredder is broken and the recyclability is poor.

  For this reason, document binding tools that bind documents without using a needle have been proposed (see Patent Documents 5 to 8).

JP-A-6-72060 JP 2001-130826 A JP 2002-96963 A JP 2001-316034 A Japanese Patent Publication No.49-5960 JP 2005-74787 A Japanese Patent Laid-Open No. 2005-74858 JP 2012-148505 A

  In such a document binding tool that binds documents without using a needle, a connecting portion such as a cut portion or a recessed portion having a predetermined shape is formed on a sheet bundle made up of a plurality of sheets, and each sheet of the sheet bundle is mutually connected at the connecting portion. The paper bundle is bound by binding the paper bundles, and paper dust residue is generated when forming this joint, and this paper dust residue may contaminate the image of the paper or accumulate inside the device and cause a failure. There is.

  The present invention has been made in view of such a situation, and the paper dust residue generated in the staple process for binding the image-formed paper without using the binding needle stains the image of the paper or is scattered inside the apparatus. An object of the present invention is to provide a sheet post-processing apparatus that does not need to be performed.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention described in claim 1 is connected to an image forming apparatus. In the image forming apparatus, sheets on which images have been formed based on input image data are sequentially fed, and a predetermined amount of paper is fed to the fed sheets. A paper post-processing device for processing,
The sheet bundle made up of a plurality of sheets is automatically formed with a cut-off portion and a cut-hole having a predetermined shape, and the cut-out portion is inserted into the cut-out hole so that the sheets of the sheet bundle are coupled to each other. A stipple section for stapling a stack of paper;
A paper dust residue storage portion for storing paper dust residue generated when forming the slit portion of the predetermined shape and the cut hole,
The paper dust residue storage unit has a dust chute for guiding the paper dust residue, a storage box for storing the paper dust residue, and a fan constituting dust collecting means for collecting the paper dust residue in the storage box,
The down chute communicates with the storage box from the stipple portion,
The fan is disposed on the downshoot,
In the subsequent stage of the fan,
The sheet post-processing apparatus is characterized in that an exhaust port is formed at an upper position of the down chute and the storage box is detachably provided at a lower position .

  According to a second aspect of the present invention, there is provided warning means for detecting the number of times of staple operation and notifying the removal of the paper dust residue collected in the paper dust residue storage portion when the set number of operation times is reached. Is a sheet post-processing apparatus.

  According to a third aspect of the present invention, there is provided warning means for detecting the number of sheets to be stapled and notifying removal of the paper dust residue stored in the paper dust residue storage unit when the number of sheets to be stapled reaches a set number. The sheet post-processing apparatus according to claim 1.

  With the above configuration, the present invention has the following effects.

According to the first aspect of the present invention, a cut-off portion and a cut-hole having a predetermined shape are automatically formed in a bundle of sheets made up of a plurality of sheets, and the cut-off portion is inserted into the cut-out hole so that each sheet of the paper bundle The paper bundle generated by forming the cut-off part and the cut-out hole of the predetermined shape is housed by connecting the paper bundles, and a sensor for checking the filling state of the needle is not required and the structure is simple. It becomes, and paper dust scum or soil the image of the paper that occurs in stippling, rather name be scattered inside the apparatus can be accumulated reliably paper dust scum storage box.

  According to the second aspect of the present invention, the number of staple operations is detected, and when the set number of operations is reached, the removal of the paper dust remaining in the paper dust residue storage unit is notified, so that the paper dust residue collected in the paper dust residue storage unit. Can be reliably removed.

  According to the third aspect of the present invention, the number of sheets to be stapled is detected, and when the number of sheets to be stapled reaches the set number, the removal of the paper dust residue stored in the paper dust residue storage unit is notified, thereby storing the paper dust residue. It is possible to reliably remove the paper dust remaining in the section.

It is a top view of a paper post-processing apparatus. It is a front view of a paper post-processing apparatus. It is a side view of a paper post-processing apparatus. It is a perspective view of a paper post-processing apparatus. It is a block diagram of a paper post-processing apparatus. It is sectional drawing of a paper post-processing apparatus. It is a figure which shows the action | operation of a support. It is a figure which shows a stack and a jogger. It is a figure which shows stacking | stacking of a sheet bundle. It is a figure which shows the state of a jogger and a stack. It is a figure which shows the state of a stipple. It is a figure explaining the action | operation when not stippling. It is a figure explaining the action | operation when not stippling. It is a figure explaining the action | operation in the case of stippling. It is a figure explaining the action | operation in the case of stippling. It is a perspective view which shows the external appearance of a stipple apparatus. It is sectional drawing of a stipple apparatus. It is a figure which shows the operation | movement which closes a sheet bundle. It is a figure which shows the operation | movement which closes a sheet bundle. It is a figure which shows the operation | movement which closes a sheet bundle. It is a figure which shows the operation | movement which closes a sheet bundle. It is a figure which shows the operation | movement which closes a sheet bundle. FIG. 6 is a perspective view showing a sheet bundle in a state before stapling. FIG. 6 is a perspective view showing a sheet bundle in a stapled state. It is a figure which shows the stapled paper bundle. It is a block diagram of a warning means.

Hereinafter, embodiments of the sheet post-processing apparatus of the present invention will be described. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.
(Configuration of paper post-processing device)
1 is a plan view of a paper post-processing apparatus, FIG. 2 is a front view of the paper post-processing apparatus, FIG. 3 is a side view of the paper post-processing apparatus, FIG. 4 is a perspective view of the paper post-processing apparatus, and FIG. It is a block diagram of an apparatus.

  The sheet post-processing apparatus 1 according to this embodiment includes a stacking tray 3, a support 20, a jogger / stacking unit 30, a stapling device 40, a sheet conveying unit 10, and the like in the apparatus main body 2. Positioning members 90 are provided on the bottom of the apparatus main body 2 so as to protrude downward on both the left and right sides. The positioning member 90 is inserted into the upper part of an image forming apparatus such as a copying machine or a printer, and the sheet post-processing apparatus 1 is inserted. A sheet that is arranged and discharged from the image forming apparatus is carried in from below. The sheet conveying means 10 is configured to convey the sheet carried from the upper part of the image forming apparatus to the stacking tray 3, and is subjected to a jogger stack process and a stipple process by the jogger stack means 30 and the stipple apparatus 40. The bundle of sheets is stacked on the stacking tray 3.

  6 to 9 show the operation of the paper post-processing device, FIG. 6 is a control diagram of the paper post-processing device, FIG. 7 shows the operation of the support, and FIG. FIG. 7B is a diagram showing a state in which the support has moved forward, FIG. 8 is a perspective view showing the stack and the jogger, FIG. 9 shows stacking of the sheet bundle, and FIG. 9A shows the leading end side of the aligned sheet bundle. FIG. 9B is a diagram showing a state in which the rear end side of the aligned sheet bundle is dropped on the stacking tray.

  In the apparatus main body 2 of this embodiment, a sheet conveying means 10, a support 20, a jogger / stack means 30, a stipple device 40, and the like are arranged. The paper transport unit 10 includes a transport guide 11 and a transport roller 12, and transports the paper 100 discharged from the image forming apparatus onto the stacking tray 3 from a position below the apparatus main body 2. The conveyance roller 12 is driven by a conveyance driving unit 200 including, for example, a power transmission unit such as a motor, a belt, and a gear. The conveyance driving unit 200 drives the conveyance roller 12 to convey the paper 100.

  For example, three supports 20 are arranged in the horizontal direction above the stacking tray 3. The support 20 can be moved forward and backward in the paper discharge direction with respect to the apparatus main body 2, and the rear end portion of the paper 100 discharged by the paper transporting means 10 is supported at the forward movement position of the support 20 and dropped at the backward movement position. The support 20 is driven by a support drive 201 configured by, for example, power transmission means such as a motor and a cam, and the support 20 moves forward and backward by the support drive 201.

  The jogger / stack means 30 has a pair of left and right joggers 31 for stacking and jogging. The pair of left and right joggers 31 can move in the left-right direction with respect to the sheet discharge center position in the apparatus main body 2. The pair of left and right joggers 31 has a U-shaped cross section composed of a lower guide 31a, an upper guide 31b, and a connecting guide 31c. The pair of left and right ends of the sheet discharged by the sheet conveying means 10 Support and stack and jogger.

  The pair of left and right joggers 31 are provided on the moving body 38 by a slide lever 32. The pair of left and right joggers 31 are driven by a jogger driving means 202 configured by a power transmission means such as a motor and an operating shaft in order to align and open and close the pair of left and right joggers 31. The movement in the left-right direction is driven by jogger movement driving means 203 configured by power transmission means such as a motor, gears, and belts. The paper 100 is aligned by the pair of left and right joggers 31.

  The jogger / stack means 30 is disposed above the stacking tray 3, and the support 20 is disposed between the stacking tray 3 and the jogger / stack means 30. For this reason, the paper 100 discharged by the paper transporting means 10 is supported at its leading end by a pair of left and right joggers 31 of the jogger stacking means 30, and its rear end is placed on the support 20 at the forward position to align with the paper bundle 110. To do. At this time, the support 20 supports the inner side in the width direction of the rear end portion of the paper 100, and supports the inner side in the width direction of the rear end portion of the sheet bundle 110 aligned with the support 20. Even if the paper 100 curls around the transport direction due to the structure of the system, the deviation of the paper bundle 110 can be reduced.

  By opening the pair of left and right joggers 31, the leading end side of the aligned sheet bundle 110 is dropped onto the stacking tray 3, only the rear end portion of the sheet bundle 110 is placed on the support 20, and the support 20 is moved backward. Then, the rear end portion of the sheet bundle 110 placed on the support 20 is dropped on the stacking tray 3 and stacked.

  When stacked, the pair of left and right joggers 31 has a U-shaped cross section including a lower guide 31a, an upper guide 31b, and a connecting guide 31c, and supports the both end portions on both ends of the sheet 100 and the bottom portions on both ends. Therefore, by opening the pair of left and right joggers 31, the leading end side of the aligned sheet bundle 110 falls on the stacking tray 3. The rear end portion of the sheet bundle 110 is placed on a support 20, which is disposed between the stacking tray 3 and the jogger / stack means 30 and is positioned lower than the pair of left and right joggers 31. 20, the rear end of the sheet bundle 110 placed on the support 20 is dropped onto the stacking tray 3, and the sheet bundle 110 can be dropped onto the stacking tray 3 smoothly and quickly. When dropping, air escapes from the front end side to the rear end side of the sheet bundle 110, so that the sheet bundle 110 loaded by the air does not shift.

  Also, a pair of left and right joggers 31 are disposed on the stacking tray 3, and a support 20 is disposed between the stacking tray 3 and the pair of left and right joggers 31, and the support 20 is positioned lower than the pair of left and right joggers 31. Then, the support 20 can be moved backward to drop the stack of sheets 110 onto the stacking tray 3 in a short time, and the next sheet 100 can receive the pair of left and right joggers 31, shortening the receiving time and improving productivity. Can be improved.

Staple unit 40 is positioned internal to the right of the apparatus body 2, and staple the sheet bundle 110, which is aligned by a jogger stack unit 30, the stipple, the corners of the rear end of the sheet bundle 110 which is aligned This is a configuration for stapling without using a needle.

FIG. 10 is a diagram showing the jogger and stack states, and FIG. 11 is a diagram showing the stipple state. On the right side of the apparatus main body 2, a sheet bundle holder 50 is disposed at a position for stapling the sheet bundle 110 aligned by the jogger stack means 30. The sheet bundle holder 50 holds the sheet bundle 110 to be stapled.

  In FIG. 10, the pair of left and right joggers 31 of the jogger stack means 30 are in the position of the jogger stack, and the sheet bundle holder 50 functions as a cover that covers the stipple device 40 and enters a position where fingers and the like are stippled. It is preventing. In this state, the projection 33 formed on the slide lever 32 that supports the right jogger 31 is in a position where the arm 34 is not operated. When the arm 34 pushes one end 36a of the link 36 via the auxiliary lever 35, the other end 36b pushes the contact 37a of the safety switch 37 to turn off the safety switch 37.

  When the pair of left and right joggers 31 of the jogger stack means 30 is in the position of the jogger stack, the projection 33 formed on the slide lever 32 that supports the right jogger 31 is in a position where the arm 34 is not operated. Since the arm 34 does not push the one end 36a of the link 36 via the auxiliary lever 35 and the link 36 does not operate, the safety switch 37 prohibits the operation of the staple device 40 in a non-energized off state. .

In FIG. 11, the pair of left and right joggers 31 of the jogger stack means 30 move to the stipple position and stipple. At this stipple position, the projection 33 formed on the slide lever 32 that supports the right jogger 31 moves the arm 34. Since the arm 34 is actuated, the arm 36 pushes one end 36a of the link 36 via the auxiliary lever 35, the link 36 is actuated, and the other end 36b pushes the contact 37a of the safety switch 37 to activate the safety switch 37. The energization is turned on, and the stipple device 40 operates to stipple.
(Operation of paper post-processing device)
When the control device 300 receives a command for the number of sheets 100 to be aligned from the control device of the image forming apparatus and drives the transport driving unit 200, the support driving 201, the jogger driving unit 202, and the jogger movement driving unit 203, the control device 300 does not stap. The shift product operation and the bar product operation, and the shift product operation and the bar product operation in the case of stapling are performed.

[Shift product operation without stippling]
The operation when not stippling will be described with reference to FIGS. The pair of left and right joggers 31 can move in the left-right direction with respect to the sheet discharge center position K1, and the sheet 100 is set to the left and right end surfaces of the sheet 100 on the basis of the sheet discharge center position K1 conveyed. Align with the operation of the jogger 31. The rear end of the paper 100 is supported by the support 20 at the forward position (step a11).

  After aligning the right end surface and the left end surface of the paper 100, the right end surface and the left end surface of the paper bundle 110 are moved to the right from the paper discharge center position K1 while being sandwiched between the pair of left and right joggers 31, and a stacking position K2 separated by a distance L1. (Step a12).

  At this stacking position K 2, the pair of left and right joggers 31 are opened, the leading end side of the aligned sheet bundle 110 is dropped onto the stacking tray 3, and only the rear end portion of the sheet bundle 110 is placed on the support 20. In this state, the support 20 is then moved backward, and the rear end portion of the sheet bundle 110 placed on the support 20 is dropped onto the stacking tray 3 and stacked (step a13). When the sheet bundle 110 is dropped onto the stacking tray 3, air escapes from the front end side to the rear end side of the dropped sheet bundle 110, so that the stacked sheet bundle 110 is not displaced by the air.

  Next, the pair of left and right joggers 31 are moved to the sheet discharge center position K1, and the next sheet 100 to be sent is based on the sheet discharge center position K1, and the right and left end surfaces of the sheet 100 are paired with the pair of left and right joggers 31. The rear end of the paper 100 is supported by the support 20 at the forward position (step a14).

  After aligning the right end surface and the left end surface of the sheet 100, the sheet is moved leftward from the sheet discharge center position K1 while the right end surface and the left end surface of the sheet bundle 110 are sandwiched between the pair of left and right joggers 31, and the stacking position K3 is separated by a distance L2. (Step a15).

  At this stacking position K3, the pair of left and right joggers 31 are opened, the leading end side of the aligned sheet bundle 110 is dropped onto the stacking tray 3, and only the rear end portion of the sheet bundle 110 is placed on the support 20. In this state, the support 20 is then moved backward, and the rear end portion of the sheet bundle 110 placed on the support 20 is dropped onto the stacking tray 3 and stacked (step a16). When the sheet bundle 110 is dropped onto the stacking tray 3, air escapes from the front end side to the rear end side of the dropped sheet bundle 110, so that the stacked sheet bundle 110 is not displaced by the air.

  In this way, the sheet bundle 110 is aligned at the sheet discharge center position K1 and moved to one side in the left-right direction, the pair of left and right joggers 31 are opened at the stacking position K2, and the support 20 is moved backward to place the sheet bundle 110 on the stacking tray 3. And the sheet bundle 110 at the sheet discharge center position K1 are aligned and moved to the other in the left and right direction, the pair of left and right joggers 31 are opened at the stacking position K3, and the support 20 is moved backward to move the sheet bundle 110. The operation of dropping and stacking on the stacking tray 3 is repeated, and the sheet bundle 110 is alternately displaced L3 and stacked on the stacking tray 3 (step a17).

[Bar stack operation without stippling]
Steps a11 to a13 described in the shift product operation without stapling are repeated, and the operations after step a14 are not performed. In this way, the sheet bundle 110 is aligned at the sheet discharge center position K1 and moved only in one of the left and right directions, the pair of left and right joggers 31 are opened at the stacking position K2, the support 20 is moved backward, and the sheet bundle 110 is moved to the stacking tray 3. The operation of dropping and stacking is repeated, and the sheet bundle 110 is stacked on the stacking tray 3 without being displaced alternately.

[Shift product operation when stippling]
The operation for stapling will be described with reference to FIGS. The pair of left and right joggers 31 can be moved in the left-right direction with respect to the sheet discharge center position K1, and the sheet 100 is set with the right and left end surfaces of the sheet 100 as a pair of left and right with reference to the sheet discharge center position K1 that has been conveyed. Align with the operation of the jogger 31. The rear end portion of the sheet 100 is supported by the support 20 at the forward position (step a21).

  After aligning the right end surface and the left end surface of the sheet 100, the right end surface and the left end surface of the sheet bundle 110 are moved to the right while being sandwiched between the pair of left and right joggers 31, and are stapled by the staple device 40 at the staple position K4 (step a22). ). After the stapling, the right end surface and the left end surface of the sheet bundle 110 are moved leftward while being sandwiched between the pair of left and right joggers 31 and set to the return stacking position K2 (step a23).

  At this stacking position K2, the pair of left and right joggers 31 are opened, the leading end of the stapled bundle of sheets 110 is dropped onto the stacking tray 3, and only the rear end of the stack of sheets 110 is placed on the support 20. In this state, the support 20 is then moved backward, and the rear end portion of the sheet bundle 110 placed on the support 20 is dropped onto the stacking tray 3 and stacked (step a24).

  Next, the pair of left and right joggers 31 are moved to the sheet discharge center position K1, and the next sheet 100 to be sent is based on the sheet discharge center position K1, and the right and left end surfaces of the sheet 100 are paired with the pair of left and right joggers 31. The rear end portion of the sheet bundle 110 is supported by the support 20 at the advanced position (step a25).

  After aligning the right and left end surfaces of the paper, the right and left end surfaces of the sheet bundle 110 are moved to the right while being sandwiched between the pair of left and right joggers 31 and are stapled by the stipple device 40 at the stipple position K4 (step a26). . After the stapling, the right end surface and the left end surface of the sheet bundle 110 are moved to the left while being sandwiched between the pair of left and right joggers 31 and set to the return stacking position K3 (step a27).

  At this stacking position K3, the pair of left and right joggers 31 are opened, the leading end side of the stapled sheet bundle 110 is dropped onto the stacking tray 3, and only the rear end portion of the sheet bundle 110 is placed on the support 20. In this state, the support 20 is then moved backward, and the rear end portion of the sheet bundle 110 placed on the support 20 is dropped onto the stacking tray 3 and stacked (step a28).

  In this way, the sheet bundle 110 is aligned at the sheet discharge center position K1 and moved to one side in the left-right direction, and is stapled by the stipple device 40 at the stipple position K4, and then moved to one pair of left and right at one stacking position K2. Opening the jogger 31 and moving the support 20 backward to drop and stack the sheet bundle 110 on the stacking tray 3, and aligning the sheet bundle 110 at the sheet discharge center position K1 and moving the sheet bundle 110 to one side in the left-right direction, the staple position K4 Then, the operation of stapling by the stapling device 40 and the operation of moving and opening the pair of left and right joggers 31 at the other stacking position K3, moving the support 20 backward and dropping the stack of sheets 110 onto the stacking tray 3 are repeated. Then, the sheet bundle 110 is alternately displaced L3 and stacked on the stacking tray 3 (step a29).

[Bar stack operation when stippling]
Steps a21 to a24 described in the shift product operation in the case of stippling are repeated, and the operations after step a25 are not performed. In this way, the sheet bundle 110 is aligned at the sheet discharge center position K1 and moved only in one of the left and right directions and is stapled by the stipple device 40 at the stipple position K4, and then moved to the left and right pair at one stacking position K2. The jogger 31 is opened and the support 20 is moved backward to drop and stack the sheet bundle 110 on the stacking tray 3 to stack the sheet bundle 110 on the stacking tray 3 without being displaced alternately.

(Structure of stipple device)
The sheet post-processing apparatus according to this embodiment is connected to the image forming apparatus, and the image forming apparatus sequentially feeds sheets on which images have been formed based on input image data. A stipple device is provided as shown in FIGS. 16 is a perspective view showing the appearance of the stipple device, FIG. 17 is a cross-sectional view of the stipple device, FIGS. 18 to 22 are views showing the operation of closing the paper bundle, and FIG. 23 is a perspective view showing the paper bundle in a state before stapling. FIG. 24 is a perspective view showing the stapled sheet bundle, FIG. 25 is a view showing the stapled sheet bundle, and FIG. 26 is a block diagram of the warning means.

  The stipple device 40 of this embodiment includes a stipple unit 410 and a paper dust residue storage unit 440. The staple unit 410 is not limited to this embodiment as long as it binds an image-formed sheet without using a binding needle, and a well-known one is used. In the staple portion 410 of this embodiment, the upper die 411 is supported by the support shaft 413 so as to be rotatable with respect to the lower die 412. The presser plate 414 is disposed between the upper mold 411 and the lower mold 412 and is rotatably supported by the support shaft 413. A compression coil spring 415 is disposed between the upper mold 411 and the presser plate 414, and a plate spring 416 is disposed between the presser plate 414 and the upper mold 411.

  The staple unit 410 includes a driving device 430 that rotates the upper mold 411. The drive device 430 is configured by, for example, an electromagnetic solenoid. When the power is turned on, the plunger 431 pushes the upper die 411 to rotate against the compression coil spring 415, and when the power is turned off, the upper die 411 is moved by the compression coil spring 415. Return to the position.

  A cutting blade 417, a knife 418, and a cam 419 are attached to the upper mold 411. A cam 419 is disposed between the cutting edge 417 and the knife 418. The cam 419 is rotatably supported by a cutting blade 417 fixed to the upper mold 411. The leaf spring 420 engages with the back surface of the cam 419. The blade surface of the cutting edge 417 is formed in a U-shape, and the cross section of the knife 418 is formed in a single-character shape, which are combined to form a U-shaped cutting edge portion 91 and an I-shaped portion as shown in FIG. A cut hole 92 is formed. A substantially rectangular window 418 a is opened at the center of the knife 418. Opposite to the cutting edge 417 and the knife 418, substantially rectangular holes 414 a and 414 b are formed in the holding plate 414, and a substantially rectangular hole 412 a is formed in the lower mold 412.

  Next, the operation of the stipple unit 410 will be described with reference to FIGS. First, the sheet bundle 110 is placed between the lower mold 412 and the pressing plate 414 (FIG. 18). Next, when the power of the driving device 430 is turned on and the upper die 411 is pushed down to a predetermined position by the plunger 431, the cutting blade 417 and the knife 418 pass through the holes 414a and 414b of the holding plate 414, respectively, and the sheet bundle 110 Through the hole 412a provided in the lower mold 412. At this time, the cutting blade 417 forms a U-shaped cut-off portion 91 in the paper bundle 110, and the cutting blade 418 forms an I-shaped cutting hole 92 in the paper bundle 110. The cut U-shape The claw 419a of the cam 419 engages with the cut-off portion 91 and pushes up the U-shaped cut-off portion 91 (FIG. 19).

  When the upper die 411 is further pushed down, the cam 419 rotates counterclockwise with the intermediate portion 414c between the holes 414a and 414b of the presser plate 414 as a fulcrum. At this time, the claw 419a of the cam 419 pushes and bends the U-shaped cut-off portion 91 and puts its tip into the window 418a of the knife 418 (FIG. 20).

  When the power of the driving device 430 is turned off, the upper mold 411 returns to the original position by the action of the compression spring 415. As a result, the cam 419 is rotated clockwise by the action of the leaf spring 420 and returned to its original position (FIG. 21). At this time, both the cutting blade 417 and the knife 418 are also rising, and the cutting blade 417 is pulled out from the sheet bundle 110 as it is, but the knife 418 hooks the tip of the U-shaped cut-off portion 91 of the sheet bundle 110 on the window 418a. Then, the tip of the U-shaped cut-off portion 91 is inserted into the I-shaped cut-out hole 92 with the knife 418 opened, and then comes out of the sheet bundle 110 (FIG. 22).

  As a result, the stapling operation of the sheet bundle 110 is completed, and as shown in FIGS. 24 and 25, the tip of the U-shaped cut-off portion 91 is inserted into the I-shaped cut-out hole 92, and the tip is exposed. The side is the front side of the sheet bundle 110, that is, the side on which an image is formed.

  The paper dust residue storage portion 440 is disposed below the stipple portion 410, and the paper dust residue generated when the U-shaped cut-off portion 91 and the I-shaped cut hole 92 are formed by cutting in the stipple portion 410. Store. The paper dust residue storage unit 440 includes a dust chute 441 that guides the paper dust residue, a storage box 442 that stores the paper dust residue, and a fan 443 that constitutes dust collecting means for collecting the paper dust residue in the storage box 442. . In this embodiment, the dust collecting means is constituted by the fan 443, but a pressure reducing device may be used. This dust collecting means is driven while the stipple device performs the stipple operation.

  The dust chute 441 communicates with the storage box 442 from the staple portion 410, a fan 443 is disposed on the dust chute 441, and an exhaust port 441 a is formed above the dust chute 441. A filter 441b for preventing paper dust residue from leaking is disposed at the exhaust port 441a. By driving the fan 443, the paper dust residue can be guided through the down chute 441, and the paper dust residue can be reliably stored in the storage box 442. The storage box 442 is detachable, and is removed and replaced at a predetermined time or paper dust residue is discharged.

  As shown in FIG. 26A, the sheet post-processing apparatus according to this embodiment detects the number of staple operations, and informs the removal of the paper dust residue that accumulates in the paper dust residue storage unit 440 when the set number of operation times is reached. A warning means K1 is provided. The warning unit K1 includes a tipping operation counting unit 500 that counts the tipping operation in the stipple unit 410, and sends count information to the control device 300. In the control device 300, when the tipping operation counting means 500 counts for a predetermined time, the alarm means 502 is driven to notify the discharge timing of the paper dust remaining in the storage box 442. Accordingly, the user can replace the storage box 442 or reliably discharge the paper dust remaining in the storage box 442. The alarm unit 502 includes an alarm lamp or an alarm buzzer.

  Further, as shown in FIG. 26 (b), there is provided warning means K2 for detecting the number of sheets to be stapled and notifying removal of the paper dust residue stored in the paper dust residue storage unit 440 when the set number of staples is reached. it can. When the number of sheets to be stapled is input to the image forming apparatus, the warning means K2 includes a sheet counting means 510 that detects the number of sheets to be stapled based on the number of sheets and the number of times of stapling. This is sent to the control device 300. In the control device 300, when the set number of sheets to be stapled by the paper counting unit 510 is counted, the alarm unit 502 is driven to notify the discharge timing of the paper dust remaining in the storage box 442.

  Thus, the U-shaped cut-off portion 91 and the I-shaped cut-out hole 92 are automatically formed in the sheet bundle 110 made up of a plurality of sheets, and the U-shaped cut-off portion 91 and the I-shape are formed. The paper bundle 110 is coupled to each other by the cut holes 92 to staple the paper bundle 110. The paper produced when the U-shaped cut-off portion 91 and the I-shaped cut hole 92 are formed by the cut. By storing powder residue, there is no need for a sensor to check the filling condition of the needle, the structure is simple, and the paper dust residue generated in the staple process may contaminate the paper image or scatter inside the device. Absent.

  The present invention is conventionally applied to a sheet post-processing apparatus that is connected to an image forming apparatus such as a copying machine or a printer and performs stapling processing to bind an image-formed sheet without using a binding needle, and uses a binding needle. Thus, paper dust residue generated in the stapling process for binding the paper on which the image has been formed does not stain the paper image or scatter inside the apparatus.

DESCRIPTION OF SYMBOLS 1 Paper post-processing apparatus 2 Apparatus main body 3 Loading tray 10 Paper conveyance means 11 Conveyance guide 12 Conveyance roller 20 Support 30 Jogger stack means 31 A pair of left and right joggers 31a Lower guide 31b Upper guide 31c Connection guide 32 Slide lever 33 Protrusion 34 Arm 35 Auxiliary lever 36 Link 37 Safety switch 38 Moving body 40 Stapling device 50 Paper bundle holder 91 U-shaped cutting slot 92 I-shaped cutting hole 100 Paper 110 Paper bundle 200 Transport driving means 201 Support driving means 202 Jogger driving means 203 Jogger movement drive means 300 Control device 410 Stipple portion 411 Upper die 412 Lower die 413 Support shaft 414 Press plate 415 Compression coil spring 416 Plate spring 417 Cutting blade 418 Knife 419 Cam 420 Plate spring 430 Drive device 431 Ranger 440 Paper dust residue storage unit 441 Duust chute 442 Storage box 443 Fan 500 Tip operation count means 510 Paper count means 502 Alarm means K1, K2 Warning means

Claims (3)

A sheet post-processing apparatus connected to an image forming apparatus, in which sheets on which images are formed based on input image data are sequentially fed, and a predetermined post-processing is performed on the fed sheets. ,
The sheet bundle made up of a plurality of sheets is automatically formed with a cut-off portion and a cut-hole having a predetermined shape, and the cut-out portion is inserted into the cut-out hole so that the sheets of the sheet bundle are coupled to each other. A stipple section for stapling a stack of paper;
A paper dust residue storage portion for storing paper dust residue generated when forming the slit portion of the predetermined shape and the cut hole,
The paper dust residue storage unit has a dust chute for guiding the paper dust residue, a storage box for storing the paper dust residue, and a fan constituting dust collecting means for collecting the paper dust residue in the storage box,
The down chute communicates with the storage box from the stipple portion,
The fan is disposed on the downshoot,
In the subsequent stage of the fan,
A paper post-processing apparatus , wherein an exhaust port is formed at an upper position of the down chute and the storage box is detachably provided at a lower position .   2. The paper post-processing apparatus according to claim 1, further comprising a warning unit that detects the number of times of staple operation and notifies the removal of paper dust residue collected in the paper dust residue storage unit when the set number of operation times is reached.   2. The apparatus according to claim 1, further comprising a warning unit that detects the number of sheets to be stapled and notifies the removal of the paper dust residue collected in the paper dust residue storage unit when the number of sheets to be stapled reaches a set number. Paper post-processing equipment.