JP2013035185A - Saddle stitching stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dislocation of bound sheets or a binding position in saddle stitching of sheets to be bound.SOLUTION: A saddle stitching stapler includes: driver mechanism units 21a, 21b driving staples to bound sheets; clinchers 44, 44 provided at positions facing the driver mechanism units 21a, 21b respectively through a traveling path 43 for passing the sheets to be bound 3; and a driving mechanism 50 moving the driver mechanism units 21a, 21b to approach to and separate from the clinchers 44, 44. In the operation of moving respective driver mechanism units 21a, 21b in a direction of approaching to and separating from the clincher 44, 44 to clamp the sheets to be bound 3 on the clinchers 44, 44, and successively driving staples to the clamped sheets to be bound 3, the driving mechanism 50 operates the diver mechanism units 21a, 21b so that the staples are driven to the sheets to be bound 3 with a phase difference while overlapping the times for clamping the sheets to be bound 3.

Description

  The present invention relates to a saddle stitching stapler for saddle stitching a binding sheet.

  Some image forming apparatuses such as copying machines have a built-in stapler for saddle stitching sheets on which images are formed. In the saddle stitching stapler, the binding sheets are aligned and the motor is used as a drive source so that, for example, two places are stapled. Specifically, when saddle-stitching the binding sheets, there is a technique in which the driver mechanism unit is brought close to the clincher to clamp the binding sheets and then the staples are driven into the binding sheets to bind the binding sheets. Thereafter, the binding sheet is sent to the next step between the driver mechanism and the clincher.

  However, when binding a plurality of locations of the binding paper at the same time, mechanical and electrical loads for clamping the binding paper and driving the staple are applied at the same timing. For this reason, in this type of electric stapler, it is necessary to increase the mechanical strength of the frame, the peak current increases, the power consumption increases, and the motor also increases in size.

  In this regard, in Patent Document 1, when binding a plurality of locations, each stapler is operated at different timings to reduce power consumption and to realize a miniaturization of the motor. However, in Patent Document 1, taking two-point binding as an example, one of the binding sheets is bound and the other is bound. For this reason, in Patent Document 1, since one sheet is bound and the sheet is bent, there is a case where sheet misalignment or binding pitch misalignment occurs before the other is bound.

  For example, as shown in FIG. 9A, when the clinchers 103 and 103 are integrally provided on the paper guide 102 at a facing position separated from the driver mechanism portions 101a and 101b of the stapler, one driver mechanism portion is provided. Since the other driver mechanism 101b does not clamp the binding paper 100 when the 101a is separated from the binding paper 100, the binding paper 100 is dragged by the magazine of the stapler 101a, and the position and the binding position of the binding paper 100 are shifted. May end up.

  Further, as shown in FIG. 9B, when the paper guide 102 and the clincher 103 at the facing positions separated from the driver mechanism portions 101a and 101b are separate, one driver mechanism portion 101a The guide 102 is bent to the clincher reference surface close to the clincher 103, and staples are driven. Thereafter, the guide 102 is separated from the clincher 103 and the paper guide 102. At the time of actual hitting, the binding paper is also bent in accordance with the paper guide 102, and therefore, from when one driver mechanism 101 a is separated from the paper guide 102 until the other driver mechanism 101 b clamps the binding paper 100. In addition, the position of the binding paper 100 and the spelling position may be shifted. Further, the binding paper 100 may be dragged by the magazine of the driver mechanism unit 101a, and the position of the binding paper 100 or the binding position may be shifted.

Japanese Patent Laid-Open No. 7-2416

  The present invention has been made based on the above-described problems, and provides a saddle stitching stapler capable of preventing occurrence of misalignment of the binding paper and the binding position when the binding paper is saddle-stitched. Objective.

  In order to solve the above-described problem, the saddle stitching stapler according to the present invention has at least two or more driver mechanism portions for driving staples on the binding paper, and the binding sheets at positions facing the driver mechanism portions. A clincher provided via a passage that passes through, and a drive mechanism that moves one of the driver mechanism part or the clincher in a direction approaching and separating from the other provided at an opposing position. One of the driver mechanism units or the clincher is moved in a direction approaching the other provided at the opposite position, and the binding sheet disposed between the driver mechanism unit and the clincher is clamped. Then, in the operation of driving staples onto the clamped binding paper, the drive mechanism overlaps the at least two driver mechanism sections or the clincher with the time during which the binding paper is clamped, and the phase difference To operate the staples onto the binding paper.

  Here, the drive mechanism may cause the at least two or more driver mechanism units and the clincher to simultaneously clamp the binding paper, or may provide a phase difference between the at least two or more driver mechanism units and the clincher. The binding sheet may be clamped.

  For example, the clincher is disposed below a sheet guide member that guides the binding sheet. In this case, when the staple is driven into the binding paper, the paper guide member is urged and displaced via the binding paper by the magazine of the driver mechanism unit, and the binding paper is pressed against the reference surface of the clincher. It is done.

  The number of the driver mechanism units may be two, three, or four or more.

  According to the present invention, one of the driver mechanism unit or the clincher is moved in a direction closer to the other provided at the opposite position to clamp the binding paper, and then drive the staple into the clamped binding paper. In operation, the drive mechanism causes at least two or more driver mechanism units or clincher to operate so that the time during which the binding paper is clamped overlaps and the recording staple is driven into the binding paper with a phase difference. Therefore, the mechanical load fluctuation can be reduced, and the occurrence of misalignment of the binding paper and the binding position can be prevented.

1 is a conceptual diagram of a sheet processing apparatus in which an electric stapler for saddle stitching to which the present invention is applied is incorporated. It is a perspective view of the electric stapler for saddle stitching to which the present invention is applied. It is a front view of the electric stapler for saddle stitching to which the present invention is applied. It is a principal part enlarged front view of the electric stapler for saddle stitching to which the present invention is applied, and shows a state when the magazine clamps the binding paper. It is a figure explaining the operation | movement which the driver mechanism part of two saddle stitch staplers clamps a binding paper simultaneously. (A)-(C) is a figure explaining the operation | movement which the driver mechanism part of two saddle stitch staplers clamps a binding paper, providing a phase difference. It is a figure explaining the operation | movement which the driver mechanism part of three saddle stitch staplers clamps a binding paper simultaneously. (A)-(C) is a figure explaining the operation | movement which the driver mechanism part of three saddle stitching staplers clamps a binding paper, providing a phase difference. (A) And (B) is a figure which shows the conventional stapler electric stapler for saddle stitching.

  Hereinafter, an electric stapler for saddle stitching to which the present invention is applied will be described in detail with reference to the drawings. Hereinafter, the saddle stitching electric stapler will be described in the following order.

1. Overall configuration (Description of paper processing device)
2. Saddle-stitched electric stapler (two examples of the driver mechanism of a saddle-stitching stapler)
3. 3. Operation of electric stapler for saddle stitching 3-1. Example of performing clamping simultaneously 3-2. Example of providing a phase difference in the clamp 4. Three examples of the driver mechanism of the saddle stitching stapler 4-1. Example of performing clamping simultaneously 4-2. 4. Example of providing a phase difference in the clamp Other variations

[1. Overall Configuration (Description of Paper Processing Device)]
As shown in FIG. 1, the saddle stitching electric stapler to which the present invention is applied is built in a sheet processing apparatus provided adjacent to an image forming apparatus such as a copying machine or a printer. First, the sheet processing apparatus will be described with reference to FIG. The sheet processing apparatus 1 is connected to a copying machine 2. In the sheet processing apparatus 1, a sheet carry-in port 4 for carrying a sheet 3 copied by the copier 2 is disposed on a surface connected to the copier 2. The sheet 3 carried in from the sheet carry-in port 4 is switched to one of the first conveyance path 6 on the right side and the second conveyance path 7 on the left side in FIG. Then, it is conveyed by the conveying roller 8. At the transport destination of the first transport path 6, an end binding compile tray 9 that accommodates and accommodates a plurality of sheets of paper is arranged at a slight inclination with respect to the horizontal, and one end of the end binding compile tray 9 is A sheet left end positioning unit 10 is provided. Below the end binding compile tray 9, a driver mechanism 11 of an end binding stapler is arranged. The driver mechanism 11 of the end binding stapler drives the staples by the rotation of the cam 12. The driven staple is bent by a clincher 13 provided in the vicinity of the end binding stapler 11.

  A discharge mechanism 14 for discharging the binding of the paper 3 is provided at the other end of the end binding compile tray 9. The discharge mechanism 14 is sandwiched between a discharge roller 14 a and an idle roller 14 b rotatably supported by the swing arm 15, and discharges the binding of the paper 3 from the end-bound paper carry-out port 16.

  A paper side edge aligning mechanism 17 for aligning the side edges of the paper 3 loaded into the end binding compile tray 9 is disposed on the upper surface of the end binding compile tray 9. The paper-side edge aligning mechanism 17 aligns the binding paper 3 carried into the end binding compilation tray 9 at the center position in the front-rear direction. Although not shown, a sheet left end positioning mechanism is disposed above the end binding compile tray 9 so that the binding sheets 3 loaded in the end binding compile tray 9 are always aligned with the left end position in the left-right direction. It is like that. The edge-bound binding paper 3 carried out from the edge-binding paper carry-out port 16 is discharged from the edge-binding paper carry-out port 16 to an edge-bound paper discharge tray 18 provided to protrude outward from the right side wall of the paper processing apparatus 1. The

  Further, the sheet 3 for saddle stitching is supplied to the second transport path 7. In the saddle stitching compilation tray 19 in the second transport path 7, a driver mechanism portion 21 of a pair of saddle stitching staplers is arranged side by side on the right side plate 20 side. The driver mechanism portion 21 of each saddle stitching stapler strikes staples as the cams 22 rotate. Then, the staple driven out from the driver mechanism portion 21 of each saddle stitching stapler is bent by the clincher 23.

  A pair of upper and lower folding rollers 24 are disposed below the driver mechanism portion 21 of the saddle stitching stapler. Further, a knife edge 25 that can protrude into the saddle stitching compile tray 19 is disposed in the vicinity of the saddle stitching compile tray 19. The knife edge 25 presses the center of the saddle-stitched paper 3 vertically and is pushed between the pair of folding rollers 24 to fold the saddle-stitched paper 3.

  On the lower outer surface of the saddle stitching compilation tray 19, a sheet vertical position adjusting member 26 is disposed so as to be movable up and down. The sheet vertical position adjusting member 26 has a sheet lower end support portion 27 protruding into the saddle stitching compilation tray 19. The paper vertical position adjusting member 26 is connected to an endless belt 28 that is driven by a belt drive motor, and is moved up and down as the endless belt 28 travels.

  The binding of the saddle-stitched paper 3 that has been folded by the folding roller 24 is discharged to a saddle-stitched paper discharge tray 31 that protrudes outward from the saddle-stitched paper discharge port 30 by a pair of discharge rollers 29.

[2. Saddle stitching electric stapler (two examples of the driver mechanism of the saddle stitching stapler)]
A saddle stitching electric stapler 40 to which the present invention shown in FIGS. 2 and 3 is applied is a frame 41 formed by bending a sheet metal or the like, and a driver mechanism portion of the pair of saddle stitching staplers shown in FIG. 21a and 21b are arranged.

  The driver mechanism units 21a and 21b load a cartridge with a refill containing a plurality of straight staples arranged in parallel and connected in a sheet form, and the cartridge is loaded with a refill. It is configured to be loaded into magazines 47 and 47 attached to the frame 41. Such driver mechanisms 21a and 21b sequentially supply the sheet-like staples in the cartridge to the magazine 47 or the cartridge ejection unit, and the straight staples supplied to the ejection unit are U-shaped by the forming plate of the ejection unit. After being formed into a shape, it is driven out toward the binding paper by a driver of the punching unit. In each of the driver mechanisms 21 a and 21 b, magazines 47 and 47 are further attached to attachment frames 48 and 48, and the attachment frames 48 and 48 are attached to the frame 41.

  Clincher mechanisms 42 and 42 are disposed on the frame 41 at positions facing the punching holes for driving the staples of the driver mechanism portions 21a and 21b, respectively, and spaced apart from the punching holes. Further, a saddle stitching paper traveling path 43 is formed between the driver mechanism portions 21a and 21b and the clincher mechanisms 42 and 42. The traveling path 43 has a width according to the width of the sheets to be saddle-stitched, and further has a height according to the number of sheets to be bound.

  The clincher mechanisms 42 and 42 are clincher 44 and 44 that receive staples pushed out by the drivers of the driver mechanism portions 21 a and 21 b, and a sheet guide member that is disposed on the clincher 44 and 44 and forms the traveling path 43. 45. The clinchers 44 and 44 are attached to the frame 41, and a surface facing the driver mechanism portions 21a and 21b is a clincher reference surface C (see FIG. 4) when binding the binding sheets.

  The sheet guide member 45 disposed on the clincher 44, 44 is a thin plate-like sheet metal that forms the bottom surface of the traveling path 43, and is located at a position facing the punching hole of the saddle stitching staplers 21 a, 21 b. , 44 are formed with openings 46, 46 facing the outside. The sheet guide member 45 has characteristics such as a leaf spring, and is elastically displaced in the height direction, that is, toward the clinchers 44 and 44. The paper guide member 45 is pushed by the magazine 47 of the driver mechanism portions 21a and 21b via the binding paper when the staple formed in a U-shape is driven into the binding paper, and is displaced so as to be close to the clincher 44 and 44. . As a result, the legs of the staple are bent inward, and the stapled paper is saddle stitched.

  As shown in FIG. 2, the driver mechanism portions 21 a and 21 b are moved by the drive mechanism 50 so as to be close to the clincher 44 and 44. The drive mechanism 50 includes a single motor 51 serving as a drive source, and the motor 51 is coupled to the transmission shaft 53 via a gear train 52. The transmission shaft 53 is provided with transmission gears 58 and 58 for raising and lowering the driver mechanism portions 21a and 21b in the direction of approaching and separating from the clincher mechanism 42. On the other hand, on the side surfaces of the mounting frames 48, 48 of the driver mechanism portions 21a, 21b, first lifting levers 54, 54 for lifting and lowering a forming plate for forming a straight staple into a U shape, and the driver mechanism portion 21a. , 21b, and second elevating levers 56, 56 for elevating a driver for driving a staple formed in a U-shape.

  The cam gears 55 and 55 are also rotatably attached to the side surfaces of the attachment frames 48 and 48, and the transmission gears 58 and 58 of the transmission shaft 53 are meshed with the gear portion on the outer peripheral surface. The cam gears 55 and 55 are rotated via the transmission shaft 53 and the transmission gears 58 and 58 using the motor 51 as a driving source, thereby controlling the movement of the first and second elevating levers 54 and 56, and forming plates and drivers Control the lifting and lowering.

  The first elevating levers 54 and 54 are pivotally attached to the side surfaces of the mounting frames 48 and 48 so that the base end portions are pivotable and move in the cam grooves of the cam gears 55 and 55 according to the rotation of the cam gears 55 and 55. A control protrusion is provided. The first elevating levers 54 and 54 are provided with first elevating operation shafts 57 and 57 each having a forming plate connected to the distal end thereof. The second elevating levers 56 and 56 are provided with rotation control projections that move in the cam grooves of the cam gears 55 and 55 according to the rotation of the cam gears 55 and 55. The second raising / lowering levers 56, 56 are provided with a second raising / lowering operation shaft 59 to which a driver is connected at the tip. The first and second elevating levers 54 and 56 have their rotation control projections engaged with the cam grooves of the cam gears 55 and 55, and are rotated by the rotation of the cam gears 55 and 55 to form a forming plate or a driver. Move up and down.

  As described above, each of the driver mechanism portions 21a and 21b has the lifting control protrusions engaged with the cam grooves of the cam gears 55 and 55, and the first mounting frame 48 fixed to the frame 41 according to the rotation of the cam gears 55 and 55. The first and second elevating operation shafts 57 and 59 are guided up and down in the guide holes 61 through which the first and second elevating operation shafts 57 and 59 are inserted, and are moved up and down with respect to the mounting frame 48.

  In such a drive mechanism 50, only one motor 51 is used as a drive source, and by using the transmission shaft 53, the cam gears 55 and 55 of the driver mechanism parts 21a and 21b are rotated, so that each driver mechanism part 21a. , 21b is controlled in conjunction with this, and the elevation of the forming plate and the driver is controlled via the first and second elevating levers 54, 56 in conjunction with this. As a result, the drive mechanism 50 lowers the magazine 47 of each of the driver mechanism portions 21a and 21b in a direction approaching the clincher mechanism 42, and clamps the binding paper in the travel path 43. Thereafter, the driver further lowers the magazine 47 and pushes the paper guide member 45 to displace it in the direction of the clincher 44, so that the binding paper is pressed against the clincher reference surface C of the clincher 44 in the state shown in FIG. . At the same time, the driver pushes the staple formed in a U shape onto the spelling paper, bends the leg portion of the U-shaped staple inward, and binds the spelling paper.

  The saddle stitching electric stapler 40 adjusts the shape of each cam groove of the cam gears 55 and 55 to the respective operations of the driver mechanism portions 21a and 21b, so that the timing of raising and lowering the driver mechanism portions 21a and 21b is the same. Alternatively, a phase difference is provided, or a phase difference is provided at the timing of raising and lowering the driver. In this drive mechanism 50, by providing a phase difference in the timing of raising and lowering the driver, the peak current is prevented from increasing and the maximum power consumption is reduced.

[3. Operation of electric stapler for saddle stitching]
Next, the operation of the saddle stitching electric stapler 40 including the two driver mechanism portions 21a and 21b as described above will be described with reference to FIG.

[3-1. Example of simultaneous clamping]
In the example of FIG. 5, the driver mechanism unit 21a and the driver mechanism unit 21b simultaneously clamp the binding paper 3 on the traveling path 43, and the driver mechanism unit 21a and the driver mechanism unit 21b shift the timing for driving staples. . Specifically, the driver mechanism 21a, 21b is driven by the drive mechanism 50, to start the clamping of the sheets of paper 3 at time _{t 0.} Next, from time t ₁ to time t ₂ , the driver mechanism unit 21 a first drives staples on the binding paper 3, and after this driving operation, the driver mechanism unit 21 b applies to the binding paper 3 from time t ₃ to time t _4. And stapling. The driver mechanism 21a, 21b is, after the implantation of both of the staple is completed, the routine goes to the return operation, the time t ₅ since, increases in a direction away from the clincher mechanism 42. Thereafter, the saddle-stitched binding sheet 3 passes between the driver mechanism portions 21 a and 21 b and the clincher mechanism portions 42 and 42 and is discharged from the traveling path 43.

In an example of such 5, the driver mechanism 21a, while shifting to each 21b do not overlap the timing of driving the staple, while the two driver mechanism 21a, 21b is drive staples, that is, from the time t ₀ in t _5, and it continues to clamp the sheets of paper 3. Therefore, the binding sheet 3 can be prevented from shifting the position of the binding sheet 3 when the driver mechanism portions 21a and 21b drive staples, and from shifting the binding position, i.e., the position where staples are driven. .

The timing at which the driver mechanism 21a, 21b moves to the return operation, i.e. the timing of the unclamping of the sheets of paper may be not only the same as shown as the time t ₅ in FIG. 5. For example, the timing to move to the return operation of the driver mechanism 21a may, if a staple hammering ending after the driver mechanism 21a shown in time t _2, may at any time. Further, the operation period during which the driver mechanism portions 21a and 21b drive staples may not completely overlap as shown in FIG. 5, or may partially overlap.

[3-2. Example of providing phase difference in clamp]
In the example of FIGS. 6A to 6C, the driver mechanism 21a and the driver mechanism 21b provide a phase difference to clamp the binding sheets in the travel path 43.

FIG. 6A shows an example in which the staple driving of the second driver mechanism portion 21b is completed before the first driver mechanism portion 21a releases the clamp. Specifically, first driver mechanism portion 21a clamps the sheets of paper 3 in the travel path 43 at time t _10, drive staples from the time t ₁₁ toward t ₁₂ against sheets of paper 3 that the clamp. Before unclamping after the driver mechanism 21a has finished driving the staple, the second driver mechanism 21b clamp the sheet 3 spelling at time t _13, the time from the time t ₁₄ against sheets of paper 3 that the clamp driving a staple toward the t _15. After the driver mechanism 21b has finished driving the staple, first driver mechanism 21a is shifted to a return operation at time t _16, increases in a direction away from the clincher mechanism 42, then the second driver mechanism part 21b is moved to the return operation at time t _17, increases in a direction away from the clincher mechanism 42 to release the clamp. Thereafter, the saddle-stitched binding sheet 3 passes between the driver mechanism portions 21 a and 21 b and the clincher mechanism portions 42 and 42 and is discharged from the traveling path 43.

In FIG. 6A, when the driver mechanism portions 21a and 21b drive staples, any one of the driver mechanism portions 21a and 21b always clamps the binding paper 3, so that the position of the binding paper 3 is shifted. It is possible to prevent the binding position from being shifted. In particular, when performing a second staple implantation period from time _{t 14} to _{t 15} in the driver mechanism section 21b, the driver mechanism 21a, are clamped at both 21b. Therefore, even if the staple paper 3 is bent by the staple driving by the first driver mechanism portion 21a, the staple paper 3 is moved to the driver mechanism portions 21a and 21b by the next driver mechanism portion 21b. It is clamped by both, and it can prevent reliably that the position of the binding paper 3 will shift | deviate and the position to bind will shift | deviate.

In FIG. 6A, the timing at which the driver mechanisms 21a and 21b move to the return operation, that is, the timing at which the binding of the binding paper 3 is released is the time after the end of staple driving by the second driver mechanism 21b (time). if t ₁₅ later), may be the same, also, the driver mechanism 21b may be arranged in a different order than the driver mechanism 21a.

FIG. 6B shows that the second driver mechanism 21b clamps the binding paper 3 until the first driver mechanism 21a releases the clamp on the binding paper 3, and the first driver mechanism This is an example in which the driver mechanism portion 21b completes staple driving after the clamp of the portion 21a is released. Specifically, first driver mechanism portion 21a clamps the sheets of paper in the travel path 43 at time t _20, drive staples against sheets of paper 3 that the clamp from the time t ₂₁ toward t _22. After the driver mechanism 21a has finished driving the staple, clamp the sheets of paper the second driver mechanism 21b is at time t _23, then the return operation first driver mechanism portion 21a at time t ₂₄ It moves up and moves away from the clincher mechanism 42, and the driver mechanism 21a releases the clamp. Thereafter, driving staples for the second sheets of paper to the driver mechanism 21b is clamped from the time _{t 25} toward time _{t 26,} then the driver mechanism 21b is moved to the return operation at time _{t 27,} the clincher mechanism 42 Ascend in the direction away from the, and release the clamp. Thereafter, the saddle-stitched binding sheet 3 passes between the driver mechanism portions 21 a and 21 b and the clincher mechanism portions 42 and 42 and is discharged from the traveling path 43.

  In FIG. 6B, when driving the staples in the driver mechanism units 21a and 21b, any one of the driver mechanism units 21a and 21b always clamps the binding paper, so that the position of the binding paper is shifted or bound. It is possible to prevent the position from shifting.

FIG. 6C shows an example in which the second driver mechanism portion 21b clamps the binding paper 3 before the staple driving of the first driver mechanism portion 21a. Specifically, clamping the sheets of paper in the travel path 43 first driver mechanism portion 21a at time t _30, then the second driver mechanism 21b is clamped sheets of paper at a time t _31, then , drive staples against sheets of paper to first driver mechanism 21a is clamped from the time _{t 32} toward time _{t 33.} Rises in a direction first driver mechanism 21a is separated from the clincher mechanism 42 moves to the return operation at time t _34, after the driver mechanism portion 21a releases the clamp, the second driver mechanism 21b time implanted staples against sheets of paper which is clamped from t ₃₅ toward time t _36, then the second driver mechanism 21b is moved to the return operation at time t _37, increases in a direction away from the clincher mechanism 42, the clamp Is released. Thereafter, the saddle-stitched binding sheet 3 passes between the driver mechanism portions 21 a and 21 b and the clincher mechanism portions 42 and 42 and is discharged from the traveling path 43.

In FIG. 6C, when driving the staples in the driver mechanism portions 21a and 21b, any one of the driver mechanism portions 21a and 21b always clamps the binding paper, so that the position of the binding paper is shifted or bound. It is possible to prevent the position from shifting. In particular, when performing subjected _{t 33} the first staple hammering from the time _{t 32} in the driver mechanism 21a includes a driver mechanism 21a, are clamped at both 21b. Therefore, the staple driving by the first driver mechanism portion 21a can be performed at a more accurate position.

  In FIG. 6C, the timing at which the driver mechanism portions 21a and 21b clamp the binding sheets may be the same, or the driver mechanism portion 21b may be ahead of the driver mechanism portion 21a.

[4. Three examples of saddle stitch stapler driver mechanism]
In the above example, the case where two driver mechanism portions 21a and 21b are provided in the saddle stitching electric stapler 40 has been described. However, the present invention may include three driver mechanism portions 21a, 21b, and 21c. Good. Even when there are three driver mechanism sections, each driver is adjusted by adjusting the shape of each cam groove of the cam gear 55 corresponding to each driver mechanism section 21a, 21b, 21c, as in the case of two driver mechanism sections. The mechanism parts 21a, 21b, and 21c can be moved up and down at the same timing or provided with a phase difference, and the driver can be moved up and down at a phase difference. Therefore, the operation of the saddle stitching electric stapler 40 including the three driver mechanism portions 21a, 21b, and 21c will be described with reference to FIG.

[4-1. Example of simultaneous clamping]
In the example of FIG. 7, the driver mechanism unit 21a, the driver mechanism unit 21b, and the driver mechanism unit 21c simultaneously clamp the binding paper 3 on the travel path 43, and the driver mechanism unit 21a, the driver mechanism unit 21b, the driver mechanism unit 21c, The timing for stapling is shifted. Specifically, the driver mechanism 21a, 21b, 21c is driven by a drive mechanism 50, to start the clamping of the sheets of paper 3 at time _{t 40.} Then, driving the staples against sheets of paper 3 from the time _{t 41} to the driver mechanism portion 21a ahead toward _{t 42,} staples against the post implantation completion, paper spelling driver mechanism 21b from the time _{t 43} toward _{t 44} implantation, so that drive the staples against the post implantation completion, paper spelling driver mechanism portion 21c from the time t ₄₅ toward t _46. The driver mechanism 21a, 21b, 21c, after the implantation of all of the staple has been completed, proceeds to the return operation, the time _{t 47} and subsequent rises in a direction away from the clincher mechanism 42. After that, the saddle stitched binding sheet 3 passes between the driver mechanism portions 21a, 21b, 21c and the clincher mechanism portions 42, 42 and is discharged from the traveling path 43.

In such an example of FIG. 7, while the driver mechanism portions 21a, 21b, and 21c shift the staple driving timing so as not to overlap, while the three driver mechanism portions 21a, 21b, and 21c drive the staple, that is, in _{t 46} from the time _{t 41,} and it continues to clamp the sheets of paper 3. Therefore, the binding paper 3 prevents the position of the binding paper 3 from shifting when the driver mechanism units 21a, 21b, and 21c drive staples, and the position at which binding is performed, that is, the position at which staples are driven is prevented from shifting. Can do.

The timing of the unclamping timing, i.e. sheets of paper 3 to the driver mechanism 21a, 21b, 21c moves to a return operation may be not only the same as shown as the time t ₄₇ in Figure 7. For example, the timing to move to the return operation of the driver mechanism portions 21a and 21b may be any time as long as the driver mechanism portion 21c is after the end of staple driving. Further, the operation period in which the driver mechanism portions 21a, 21b, and 21c drive staples may not completely overlap as shown in FIG. 7, or may partially overlap.

[4-2. Example of providing phase difference in clamp]
In the example of FIGS. 8A to 8C, the driver mechanism 21a, the driver mechanism 21b, and the driver mechanism 21c provide a phase difference to clamp the binding sheets in the travel path 43.

FIG. 8A shows an example in which the staple driving of the second and third driver mechanism portions 21b and 21c is completed before the first driver mechanism portion 21a releases the clamp. Specifically, first driver mechanism portion 21a clamps the sheets of paper 3 in the travel path 43 at time t _50, drive staples against sheets of paper 3 which is clamped from the time t ₅₁ toward time t _52. After the driver mechanism 21a has finished driving the staple, the staple for the second driver mechanism 21b is clamped to sheets of paper 3 at time t _53, sheets of paper 3 which is clamped from the time t ₅₄ toward time t ₅₅ Type. After the driver mechanism 21b has finished driving the staple, the staple against the third driver mechanism 21c is clamped sheets of paper 3 at time t _56, sheets of paper 3 which is clamped from the time t ₅₇ toward time t ₅₈ Type. Driver mechanism 21a, 21b, the nailing staples is completed by 21c, the driver mechanism 21a from the time _{t 59} toward time _{t 61,} the driver mechanism 21b, the driver mechanism 21c is, in turn, moves to the return operation, the clincher Ascending in the direction away from the mechanism 42, the clamp of the binding paper 3 is released. After that, the saddle stitched binding sheet 3 passes between the driver mechanism portions 21a, 21b, 21c and the clincher mechanism portions 42, 42 and is discharged from the traveling path 43.

In FIG. 8A, when the driver mechanism portions 21a, 21b, and 21c drive staples, any one of the driver mechanism portions 21a, 21b, and 21c always clamps the binding paper 3, so that the position of the binding paper 3 is It is possible to prevent displacement and binding positions from being displaced. In particular, when performing toward second time t ₅₅ staples hammering from the time t ₅₄ in the driver mechanism section 21b, the driver mechanism 21a, and clamped at both 21b, 3 nd staple implantation time t ₅₇ toward the time _{t 58} when performed in the driver mechanism 21c is clamped driver mechanism part 21a, 21b, in all 21c. Therefore, even if the staple paper 3 is bent by the staple driving by the first driver mechanism 21a, the staple paper 3 is driven by the driver mechanism 21b and 21c by the next driver mechanism 21b and 21c. Clamping is performed by the portions 21a and 21b and the driver mechanism portions 21a, 21b, and 21c, so that it is possible to reliably prevent the binding paper 3 from being displaced and the binding position from being displaced.

In FIG. 8A, the timing at which the driver mechanism sections 21a, 21b, 21c move to the return operation, that is, the timing at which the binding of the binding paper 3 is released is after the third driver mechanism section 21c finishes driving staples. if (time t ₅₈ later), all may be the same, also, any two may be the same. Further, when the timing of releasing the clamp of the binding paper 3 is shifted, the order is not limited to the driver mechanism portions 21a, 21b, and 21c.

FIG. 8B shows an example in which the third driver mechanism portion 21c clamps the binding paper 3 after the first driver mechanism portion 21a is released from the clamp and drives staples. Specifically, first driver mechanism portion 21a clamps the sheets of paper 3 in the travel path 43 at time _{t 70,} drive staples against sheets of paper 3 which is clamped from the time _{t 71} toward _{t 72.} After the driver mechanism 21a has finished driving the staple, the staple for the second driver mechanism 21b is clamped to sheets of paper 3 at time t _73, sheets of paper 3 of clamping toward t ₇₅ from the time t ₇₄ Type in. After the driver mechanism 21b has finished driving the staple, first driver mechanism 21a is moved to the return operation at time t _76, increases in a direction away from the clincher mechanism 42, releasing the clamping of the sheets of paper 3 To do. Then, during the second driver mechanism 21b which clamp the sheet 3 spelling, third driver mechanism 21c is clamped sheets of paper 3 at time _{t 77,} the clamp from the time _{t 78} toward _{t 79} Staples are driven into the stapled paper 3. After the driver mechanism 21c has finished driving the staple, toward t ₈₁ from the time t ₈₀ driver mechanism 21b, in the order of the driver mechanism 21c, passes to return operation, increases in a direction away from the clincher mechanism 42, sheets of paper Release the 3 clamp. After that, the saddle stitched binding sheet 3 passes between the driver mechanism portions 21a, 21b, 21c and the clincher mechanism portions 42, 42 and is discharged from the traveling path 43.

In FIG. 8B, when the driver mechanism portions 21a, 21b, and 21c drive staples, any one of the driver mechanism portions 21a, 21b, and 21c always clamps the binding paper 3, so that the position of the binding paper 3 is It is possible to prevent displacement and binding positions from being displaced. In particular, when performing a second staple hammering toward _{t 75} from the time _{t 74} in the driver mechanism section 21b, the driver mechanism 21a, and clamped at both 21b, 3 nd staples to the striking time _{t 78} when performed in the driver mechanism portion 21c toward _{t 79} from the driver mechanism 21b, it is clamped at 21c. Accordingly, the second and third staples are driven in a state where the second and third staples are clamped at two positions, and the position of the binding paper 3 is surely shifted or the binding position is shifted. Can be prevented.

  In FIG. 8B, the timing at which the driver mechanisms 21b and 21c move to the return operation, that is, the timing at which the binding of the binding paper 3 is released is after the staple driving by the third driver mechanism 21c is completed. For example, the driver mechanism unit 21c may be the same as the driver mechanism unit 21b.

Further, FIG. 8C is an example in which the clamping is started after the completion of the driving of the previous saddle stitching stapler and before the clamp is released. Specifically, first driver mechanism portion 21a clamps the sheets of paper 3 in the travel path 43 at time _{t 90,} drive staples against sheets of paper 3 of clamping toward _{t 92} from the time _{t 91.} Before unclamping after first driver mechanism 21a has finished driving the staple, clamp the paper 3 spelling second driver mechanism 21b at time t _93, then the first at time t ₉₄ The driver mechanism 21a releases the clamp. Thereafter, the second driver mechanism section 21b, drive staples against sheets of paper 3 of clamping toward _{t 96} from the time _{t 95.} Before unclamping after the second driver mechanism 21b has finished driving the staple, the third driver mechanism 21c is clamped sheets of paper 3 at time t _97, then the second driver mechanism 21b but to release the clamp at time _{t 98.} Thereafter, third driver mechanism unit 21c implanted staples against sheets of paper 3 which is clamped from the time _{t 99} toward _{t 100,} releasing the clamp at time _{t 101.} After that, the saddle stitched binding sheet 3 passes between the driver mechanism portions 21a, 21b, 21c and the clincher mechanism portions 42, 42 and is discharged from the traveling path 43.

  In FIG. 8C, when the driver mechanism portions 21a, 21b, and 21c drive staples, any one of the driver mechanism portions 21a, 21b, and 21c always clamps the binding paper 3, so that the position of the binding paper 3 is It is possible to prevent displacement and binding positions from being displaced.

[5. Other variations]
Regarding the drive mechanism of the driver mechanism portions 21a and 21b, an example in which one motor 51 is used as a drive source and the driver mechanism portions 21a and 21b or the driver mechanism portions 21a, 21b, and 21c are operated via the transmission shaft 53 has been described. However, the drive mechanism of the present invention is not limited to this. For example, a motor may be provided in each saddle stitching stapler, and a phase difference may be provided in the drive timing of each motor to realize the operations as shown in FIGS.

  Further, as a configuration of the clincher mechanism 42, the clincher 44 may be integrally provided on the paper guide member 45. The clincher mechanism 42 may be a flat clincher mechanism in which the binding back is finished flat.

  Also, the number of saddle stitching staplers is not limited to two or three, but may be four or more. Further, the drive mechanism may be a manual type as well as an electric type using a motor.

  Furthermore, in the above example, the case where the driver mechanism portion 21 side is moved in the direction of approaching and separating from the clincher mechanism 42 has been described, but the present invention is not limited to this, and the clincher mechanism 42 side is moved. You may make it move to the direction which approaches / separates with respect to the driver mechanism part 21. FIG. In other words, the present invention only needs to have a configuration in which the time during which the binding sheets are clamped by the driver mechanism unit 21 and the clincher mechanism unit 42 overlaps and the phase difference is provided and the staples are driven into the binding sheets. .

DESCRIPTION OF SYMBOLS 1 Paper processing apparatus, 2 Copy machine, 3 Paper, 4 Paper carry-in entrance, 5 Switching mechanism, 6 1st conveyance path, 7 2nd conveyance path, 8 conveyance roller, 9 Compiling tray for end binding, 10 Paper left end positioning Part, 11 driver mechanism part, 12 cam, 13 clincher, 14 discharge mechanism, 14a discharge roller, 14b idler roller, 15 swing arm, 16 paper exit, 17 paper side edge alignment mechanism, 18 edge-bound paper discharge tray, 19 Complement tray for saddle stitching, 20 right side plate, 21a, 21b, 21c driver mechanism, 22 cam, 23 clincher, 24 folding roller, 25 knife edge, 26 paper vertical position adjustment member, 27 paper lower end support, 28 endless belt, 29 Ejection roller, 30 Saddle binding paper discharge port, 31 Saddle binding paper discharge tray, 40 Plastic, 41 frame, 42 clincher mechanism, 43 travel path, 44 clincher, 45 paper guide member, 46 opening, 47 magazine, 48 mounting frame, 50 drive mechanism, 51 motor, 52 gear train, 53 transmission shaft, 54 1st Elevating lever, 55 cam gear, 56 second elevating lever, 57 first elevating operation shaft, 58 transmission gear, 59 second elevating operation shaft, 61 guide hole, 100 binding paper, 101a, 101b driver mechanism, 102 Paper guide, C clincher reference plane

Claims (6)

At least two driver mechanisms for driving staples on the binding paper;
A clincher provided at a position facing each of the driver mechanisms through a passage through which the binding sheets pass,
A drive mechanism that moves one of the driver mechanism part or the clincher in a direction approaching and separating from the other provided at the opposite position;
One of the driver mechanism units or the clincher is moved in a direction approaching the other provided at the opposite position, and the binding sheet disposed between the driver mechanism unit and the clincher is clamped. Then, in the operation of driving staples into the clamped binding paper,
The driving mechanism causes the at least two or more driver mechanism sections or the clincher to operate so that the time during which the binding paper is clamped overlaps and a phase difference is provided to drive the staple into the binding paper. A stapler for saddle stitching.   2. The saddle stitching stapler according to claim 1, wherein the drive mechanism causes the at least two or more driver mechanism sections or the clincher to simultaneously clamp the binding sheets.   The saddle-stitching stapler according to claim 1, wherein the driving mechanism clamps the binding paper by providing a phase difference in the at least two or more driver mechanism sections or the clincher.   The saddle stitching stapler according to any one of claims 1 to 3, wherein the clincher is disposed below a sheet guide member that guides the binding sheet.   5. The saddle stitching according to claim 4, wherein when the staple is driven into the binding paper, the paper guide member is pressed against the reference surface of the clincher by the displacement of the paper guide member by the magazine of the driver mechanism section. Stapler.   The saddle stitching stapler according to any one of claims 1 to 5, wherein the number of driver mechanism sections is three.

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