JP2017193089A - Saddle stitching apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need such that an operator determines whether a paper bundle is good or defective in the case that a position of reciprocating-motion of a head part is changed according to a thickness of the paper bundle.SOLUTION: A saddle stitching apparatus comprises: an adjustment unit which adjusts a position of reciprocating-motion of a head part; an input unit 3 in which an allowable range of a relationship between a thickness of a paper bundle 101, 102 and a length of a wire 111 driven into the paper bundle is inputted; a recognition unit 21 which recognizes the length of the wire 111 driven into the paper bundle 101, 102 and the thickness of the paper bundle 101, 102; a determination unit 22 which determines whether the length of the wire 111 driven into the paper bundle 101, 102 falls within the allowable range; and a withdrawal unit 4 which sends the paper bundle 101, 102 to a withdrawal path B which withdraws the paper bundle with respect to a prescribed transport path from a stitcher 1 to a next process when the length of the wire 111 driven into the paper bundle 101, 102 exceeds the allowable range.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a saddle stitching device for binding a bundle of sheets with a wire.

  The saddle stitching device includes a stitcher that binds a sheet bundle to be conveyed with a wire (see Patent Documents 1 and 2, etc.). The stitcher includes a head portion that reciprocates, a drive mechanism that drives the head portion, a feed roller portion that feeds the wire in conjunction with the head portion, and a cutter portion that cuts the wire in conjunction with the head portion.

  As for the stitcher, the drive mechanism reciprocates the head part once, (1) the wire of a predetermined length is sent by the feed roller part, (2) the sent wire is cut by the cutter part, and (3) cutting The formed wire is driven into the sheet bundle.

  In addition, in order to bind a bundle of sheets having different thicknesses, the saddle stitching apparatus includes an adjustment unit that changes the position of the reciprocating motion of the head unit, and is fed by the feed roller unit according to the position of the reciprocating motion of the head unit. The length of the wire is adjusted.

  Therefore, when a plurality of first and second sheet bundles having different thicknesses are continuously conveyed to the stitcher and the first sheet bundle is bound, the second sheet bundle is bound. In order to adjust the length of the wire according to the thickness, it is necessary to change the position of the reciprocating motion of the head portion.

  By the way, as described above, each time the head portion reciprocates once, the operations (1) to (3) are performed in series. For this reason, even if the position of the reciprocating motion of the head unit is changed by the adjustment unit after the wire is driven into the last first sheet bundle, it is already adapted to the first sheet bundle at the time of the change. The length of wire is cut.

  Therefore, even if the position of the reciprocating motion of the head portion is changed after the wire is driven into the last first sheet bundle, the second row in the foremost row conveyed immediately after the last first sheet bundle. This sheet bundle has a problem that a wire having a length suitable for the first sheet bundle is driven.

  Therefore, if the position of the reciprocating motion of the head unit is changed after the wire is driven into the first sheet bundle immediately before the last, the last first sheet bundle includes the first sheet bundle. A wire having a suitable length is driven, and a wire having a length suitable for the second paper bundle is driven into the second paper bundle in the front row. However, when the wire is driven into the last first sheet bundle, since the position where the wire is driven is changed together with the position of the reciprocating movement of the head portion, the shape of the wire driven into the first sheet bundle is changed. There is a problem that is not ideal.

  Therefore, in the saddle stitching device in which the operations (1) to (3) are performed in series every time the head portion reciprocates once, there is a problem even if the timing of changing the position of the reciprocating motion of the head portion is considered. As a result, the position of the reciprocating motion of the head portion is usually changed after the wire is driven into the last first sheet bundle. However, as described above, since the optimal length of the wire is not driven into the second sheet bundle in the front row, the operator needs to determine whether the second sheet bundle in the front row is a good product or a defective product. was there.

JP-A-11-240165 JP-A-9-76659

  Therefore, the problem to be solved by the present invention is that when the position of the reciprocating motion of the head unit is changed according to the thickness of the sheet bundle, the operator does not need to determine whether the sheet bundle is a good product or a defective product. It is to provide a saddle stitch device.

In order to solve the above problems, the saddle stitching device according to the present invention is:
A saddle stitching device including a stitcher that binds a bundle of sheets to be conveyed with a wire,
The stitcher
A reciprocating head,
A drive mechanism for driving the head unit;
A feed roller that feeds the wire in conjunction with the head,
A cutter unit that cuts the wire in conjunction with the head unit, and
Each time the head part reciprocates, a wire having a predetermined length is sent, the sent wire is cut, and the cut wire is driven into a sheet bundle,
Furthermore, the length of the wire to be sent is adjusted according to the position of the reciprocating motion of the head part,
Saddle stitching device
An adjustment unit for adjusting the position of the reciprocating motion of the head unit;
An input unit for inputting an allowable range of the relationship between the thickness of the sheet bundle and the length of the wire to be driven into the sheet bundle;
An instruction unit for instructing driving of the adjustment unit;
A recognizing unit for recognizing the length of the wire to be driven into the sheet bundle and the thickness of the sheet bundle each time the head unit reciprocates once;
A determination unit that determines whether the length of the wire driven into the sheet bundle is within an allowable range;
And a detaching section for sending the sheet bundle to a detaching path for detaching the sheet bundle with respect to a predetermined conveying path from the stitcher when the length of the wire driven into the sheet bundle exceeds an allowable range.

In the saddle stitching apparatus according to the present invention, when the position of the reciprocating motion of the head unit is changed according to the thickness of the sheet bundle, the operator does not need to determine whether the sheet bundle is a good product or a defective product.
Therefore, the operator can save time and labor for visually determining whether the sheet bundle is a good product or a defective product. Furthermore, since the determination is made automatically, it is possible to prevent a defective sheet bundle from being mixed by mistake.

Schematic which shows a saddle stitching apparatus. The figure which shows drive mechanisms, such as a stitcher. The figure explaining a stitcher. The figure for demonstrating the tolerance | permissible_range of the difference of the thickness of a paper bundle, and the length of the wire driven into a paper bundle. The figure explaining operation | movement of a stitcher. The figure following FIG. The figure following FIG. The figure following FIG.

  Hereinafter, an embodiment of a saddle stitching apparatus according to the present invention will be described based on the drawings.

[overall structure]
As shown in FIG. 1, the saddle stitching apparatus includes a stitcher 1 for binding a plurality of conveyed sheet bundles 101 and 102 with a wire 111. The saddle stitching apparatus includes a separation unit 4 that sends the sheet bundles 101 and 102 to a separation path B that separates from a predetermined conveyance path A from the stitcher 1 to the next process. The separation portion 4 includes a movable gate 40 and a separation hole 41. The movable gate 40 can open and close the separation hole 41, and when the sheet bundle 101, 102 is conveyed to the conveyance path A, the movable gate 40 is disposed so as to close the separation hole 41, and the sheet bundle 101, 102 is separated. When transported to the path B, the movable gate 40 is disposed so as to open the separation hole 41.

  The saddle stitching device includes a control unit 2 for controlling operations of the stitcher 1 and the movable gate 40 and the like, and an input unit 3 for inputting a predetermined instruction sent to the control unit 2. The control unit 2 includes a processor and includes an arithmetic device, a storage device, a processing device, and the like. The input unit 3 includes a touch screen, a keyboard, and the like, and an operator inputs instructions and numerical values for executing a predetermined operation of the saddle stitching apparatus.

  As shown in FIG. 2, the stitcher 1 includes a head unit 10 that reciprocates a predetermined distance in the vertical direction Z, and a drive mechanism 5 that drives the head unit 10. As shown in FIG. 3, the stitcher 1 further includes a feed roller unit 11 that feeds the wire 110, a clamp unit 13 that grips the wire 110 to be fed, a cutter unit 12 that cuts the wire 110, and a bundle of paper that has been cut. And a driving portion 15 (FIG. 7) for driving into 101. The feed roller unit 11, the clamp unit 13, the cutter unit 12 and the driving unit 15 are interlocked with the reciprocating motion of the head unit 10.

  The front-rear direction X, the left-right direction Y, and the up-down direction Z shown in FIGS. 2 and 3 are orthogonal to each other. In FIG. 2, the left-right direction Y is the front and back directions in the figure. In FIG. 3, the front-rear direction X is the front and back directions in the figure.

  In the stitcher 1, each time the head unit 10 reciprocates, the feed roller unit 11 feeds a wire 110 having a predetermined length, the clamp unit 13 grips the wire 110, and the cutter unit 12 grips the wire. 110 is cut, and the wire 110 from which the driving portion 15 (FIG. 7) is cut is configured to be driven into the sheet bundle 101.

  As shown in FIG. 2, the drive mechanism 5 includes a stepping motor unit 50 connected to the control unit 2, a rod 51 that extends in the vertical direction Z, and a rod 52 that extends in the front-rear direction X. The motor unit 50 rotates the pulley 511 via the output shaft 501. The rod 51 is connected to the pulley 503 via a clamp pin 504 provided at the lower end. The pulleys 503 and 511 are connected through a timing belt 502.

  The rods 51 and 52 are connected via a rotation shaft 505. The rotation shaft 505 is provided at the upper end portion of the rod 51 and the rear end portion of the rod 52. The rod 52 swings through a fixed shaft 506 provided at the center. The rod 52 includes a rotation shaft 507 at the front end. The rotation shaft 507 is connected to the slide head 53. The slide head 53 is engaged so as to be movable along a slide rail 530 extending in the vertical direction Z. The slide head 53 is coupled to the head unit 10 via the coupling unit 531.

  The crank pin 504 is provided eccentric from the center of the pulley 503. Therefore, when the motor unit 50 rotates the output shaft 501, the rod 51 reciprocates in the vertical direction Z together with the crankpin 504. Further, the rod 52 swings around the fixed shaft 506, and the slide head 53 reciprocates in the vertical direction Z together with the head unit 10.

  As shown in FIG. 2, the saddle stitching device further includes a clincher 6 provided below the stitcher 1. The clincher 6 includes a pair of claw portions 60 (FIG. 7) at the upper end. The claw portion 60 bends the protruding portion of the wire 111 driven into the sheet bundle 101. The drive mechanism 5 drives the claw portion 60 of the clincher 6 in addition to the stitcher 1. The clincher 6 includes an arm 61 extending in the vertical direction Z. The arm 61 is connected to the claw portion 60.

  The drive mechanism 5 includes a cam 54 connected to a pulley 503. The drive mechanism 5 includes a rod 55 that extends in the front-rear direction X. The rod 55 includes a rotation shaft 508 at the rear end. The rod 55 swings through a fixed shaft 509 provided at the center. The rod 55 includes a rotation shaft 510 at the front end. The rotating shaft 508 is always in contact with the cam 54, and the rotating shaft 510 is in contact with the lower end of the arm 61.

  Therefore, when the motor unit 50 rotates the cam 54 together with the output shaft 501, the rod 55 swings around the fixed shaft 509 at a predetermined timing. Further, the arm 61 reciprocates in the vertical direction Z together with the claw portion 60.

  As shown in FIG. 2, the saddle stitching device further includes an adjustment unit 6 that adjusts the position of the reciprocating motion of the head unit 10. The adjusting unit 6 includes a stepping motor unit 60 connected to the control unit 2, a pulley 65 coupled to the output shaft 61 of the motor unit 60, a pulley 62 coupled to the rotating shaft 505, and the pulleys 61 and 62. And a timing belt 63 that is bridged.

  When the motor unit 60 rotates the output shaft 61, the pulley 62 rotates together with the pulley 65. The rotation shaft 505 is provided eccentric from the center of the pulley 62. Therefore, when the pulley 62 rotates, the position of the reciprocating motion of the slide head 53 moves in the vertical direction Z together with the rotating shaft 505. Therefore, when the rotary shaft 505 is arranged upward, the position of the reciprocating motion of the head unit 10 is arranged together with the slide head 53, and when the rotary shaft 505 is arranged downward, the slide unit 53 and the head unit 10 are arranged. The position of the reciprocating motion is arranged below.

  As shown in FIG. 4A, the wire 111 before being driven into the sheet bundle 101 has a length L in a straight line. As shown in FIG. 4B, the wire 111 after being driven into the sheet bundle 101 is bent, the upper horizontally long portion has a length W, the pair of vertically long portions has a length H, and a pair The lower lateral portion has a length P. Therefore, the length H of the vertically long portion of the wire 111 is slightly longer than the thickness H ′ of the sheet bundle 101.

  As illustrated in FIG. 4C, the input unit 3 includes a screen unit 30. The input unit 3 receives an allowable range t of a difference between the thickness H ′ of the sheet bundle 101 and the length L of the wire 111 driven into the sheet bundle 101 via a touch screen, a keyboard, or the like. In the screen unit 30, the input allowable range t is displayed on the frame unit 31.

  As shown in FIGS. 1 and 2, the control unit 2 includes an instruction unit 20 that instructs to drive the adjustment unit 6, and the length L and the length L of the wire 111 that is driven into the sheet bundle 101 each time the head unit 10 reciprocates once. A recognition unit 21 that recognizes the thickness H ′ of the sheet bundle 101 and a determination unit 22 that determines whether the length L of the wire 111 driven into the sheet bundle 101 is within the allowable range t.

[Operation of stitcher]
Next, a series of operations of the stitcher 1 will be described based on FIG. 3 (FIG. 2) and FIGS. 5 to 8. Every time the head unit 10 reciprocates, the following operation is executed.

  In FIG. 3 (FIG. 2), the head unit 10 is disposed in the original position. The head unit 10 is configured in a portal shape. The clamp part 13 moves in the front-rear direction X. A wire 111 that has already been cut to a predetermined length by the cutter unit 12 is disposed in front of the head unit 10. The clamp unit 13 is disposed in front of the head unit 10 and holds the cut wire 111.

  In FIG. 5 following FIG. 3 (FIG. 2), the head unit 10 is raised from the original position and disposed at the top dead center. The clamp portion 13 is disposed so as to overlap the head portion 10, and the cut wire 111 is disposed in a bent portion provided at the lower end of the head portion 10.

  In FIG. 6 following FIG. 5, the head unit 10 descends from the top dead center. As the head portion 10 is lowered, the wire 111 disposed at the bent portion of the head portion 10 is bent into a portal shape.

  In FIG. 7 following FIG. 6, the head unit 10 is further lowered. The lower end of the head unit 10 contacts the upper surface of the sheet bundle 101, and the driving unit 15 drives the wire 111 into the sheet bundle 101 from above. Further, the clamp portion 13 is disposed in front of the head portion 10. The feed roller 11 feeds the wire 111 having a predetermined length from the unwinding portion 14 (FIG. 3) around which the wire is wound, and the clamp portion 13 grips the fed wire 111.

  In FIG. 8 following FIG. 7, the head unit 10 is further lowered and disposed at the bottom dead center. The lower end of the head unit 10 presses the upper surface of the sheet bundle 101, and the driving unit 15 drives the wire 111 completely into the sheet bundle 101. The claw portion 60 of the clincher 6 bends the vertically long portion of the wire 111 protruding from the sheet bundle 101 to form a lower horizontally long portion, and comes into contact with the lower surface of the sheet bundle 101. The cutter unit 12 cuts the wire 12 held by the clamp unit 13.

[Operation of Saddle Stitcher]
Next, the operation of the saddle stitching apparatus when a plurality of first sheet bundles 101 and second sheet bundles 102 having different thicknesses H ′ are continuously conveyed to the stitcher 1 will be described.

  As described above, the adjustment unit 6 changes the position of the reciprocating motion of the head unit 10. The stitcher 1 is configured such that the length L of the wire 111 fed by the feed roller 11 is changed when the position of the reciprocating motion of the head unit 10 is changed. Further, the stitcher 1 is configured such that when the reciprocating position of the head unit 10 is changed, the position where the driving unit 15 drives the wire 111 is changed.

  The instruction unit 20 instructs the adjusting unit 6 to change the position of the reciprocating motion of the head unit 10 after the wire 111 is driven into the last first sheet bundle 101 (FIG. 8). The instruction unit 20 counts the number of first sheet bundles 101 stored in advance with a counter (not shown) connected to the control unit 2 or a reader (not shown) connected to the control unit 2. Thus, by reading a code printed on the last first sheet bundle 101, it is determined whether or not the first sheet bundle 101 is the last one.

As shown in FIG. 8, when the wire 111 is driven into the last first sheet bundle 101, the wire 111 having a length L suitable for the first sheet bundle 101 is already cut.
Therefore, even if the position of the reciprocating motion of the head unit 10 is changed after the wire 111 is driven into the last first sheet bundle 101, the most immediately conveyed immediately after the last first sheet bundle 101. A wire 111 having a length suitable for the first sheet bundle 101 is driven into the second sheet bundle 102 in the front row. Thereafter, a wire 112 having a length suitable for the second sheet bundle 102 is driven into the second sheet bundle 102 immediately after the front row.

  By the way, when the length L of the wire 111 is short and the thickness H ′ of the sheet bundle 101 is thick, the length P of the lower horizontally long portion of the wire 111 after being driven becomes short. Further, when the length L of the wire 111 is long and the thickness H ′ of the sheet bundle 101 is thin, the length P of the lower horizontally long portion of the wire 111 after being driven becomes long. When the length P of the lower horizontal portion of the wire 111 is too short, the wire 111 is easily detached from the sheet bundle 101, and when the length P of the lower horizontal portion of the wire 111 is too long, the lower horizontal portions overlap each other. There is.

As described above, the wire 111 having a length suitable for the first sheet bundle 101 is driven into the second sheet bundle 102 in the foremost row conveyed immediately after the last first sheet bundle 101. The length P of the lower horizontal portion of the wire 111 may be too long or too short.
However, the length P of the lower laterally long portion of the wire 111 that is allowed varies depending on the type of the sheet bundle 102, the tolerance of the user, and the like.

  Therefore, according to the type of the sheet bundle 102, the user's tolerance, etc., the operator via the input unit 3 has the thickness H ′ of the sheet bundle 101, 102 and the wires 111, 112 driven into the sheet bundle 101, 102. The allowable range t of the difference from the length L is input.

The recognition unit 21 recognizes the length L of the wires 111 and 112 driven into the sheet bundle 101 and 102 and the thickness H ′ of the sheet bundle 101 and 102 every time the head unit 10 reciprocates once.
The determination unit 22 determines whether or not the length L of the wires 111 and 112 driven into the sheet bundle 101 and 102 is within the allowable range t.

  Based on the determination result of the determination unit 22, the separation unit 4 determines the length of the wire 111 driven into the second sheet bundle 102 in the foremost row that is conveyed immediately after the last first sheet bundle 101. When L is within the allowable range t, the second sheet bundle 102 is conveyed to the conveyance path A, while when the length L of the wire 111 driven into the second sheet bundle 102 exceeds the allowable range t, The movable gate 40 is operated so that the second sheet bundle 102 is conveyed to the separation path B.

  Therefore, the wire 111 having the optimum length for the first sheet bundle 101 is driven into the second sheet bundle 102 in the foremost row, not the wire 112 having the optimum length for the second sheet bundle 102. Since the separation unit 4 separates the defective second sheet bundle 102 to the separation path B, the operator does not need to determine whether the second sheet bundle 102 in the front row is a good product or a defective product.

As mentioned above, although preferable embodiment of this invention was described, the structure of this invention is not limited to these embodiment.
In the above embodiment, the allowable range t corresponds to the difference between the thickness H ′ of the sheet bundle and the length L of the wire driven into the sheet bundle, but the length of the lower horizontal portion of the wire driven into the sheet bundle. It may correspond to P (FIG. 4B). This is because, regardless of the thickness H ′ and the length L, the length W of the upper horizontally long portion of the wire driven into the sheet bundle is constant, and the length depends on the thickness H ′ and the length L. Because only P changes, the above difference and the length P have the same significance.

DESCRIPTION OF SYMBOLS 1 Stitcher 3 Input part 4 Separation part 5 Drive mechanism 10 Head part 11 Feed roller part 12 Cutter part 20 Instruction part 21 Recognition part 22 Judgment part 101,102 Sheet bundle 111,112 Wire L Wire length t Allowable range A Conveyance path B Exit road

Claims (1)

A saddle stitching device including a stitcher that binds the sheet bundle to be conveyed with a wire,
The stitcher is
A reciprocating head,
A drive mechanism for driving the head unit;
A feed roller portion for feeding the wire in conjunction with the head portion;
A cutter part that cuts the wire in conjunction with the head part,
Each time the head part reciprocates, the wire of a predetermined length is sent, the wire sent is cut, and the cut wire is driven into the sheet bundle,
Further, the length of the wire to be sent is adjusted according to the position of the reciprocating motion of the head part,
The saddle stitching device is
An adjustment unit for adjusting the position of the reciprocating motion of the head unit;
An input unit for inputting an allowable range of a relationship between the thickness of the sheet bundle and the length of the wire driven into the sheet bundle;
An instruction unit for instructing driving of the adjustment unit;
A recognizing unit for recognizing the length of the wire driven into the sheet bundle and the thickness of the sheet bundle each time the head part reciprocates once;
A determination unit that determines whether the length of the wire driven into the sheet bundle is within an allowable range;
A separation unit that sends the sheet bundle to a separation path that separates the sheet bundle from a predetermined conveyance path from the stitcher to a next process when the length of the wire driven into the sheet bundle exceeds an allowable range. A saddle stitching device characterized by the above.

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