JP2008002589A - Power transmission mechanism for sheet processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power transmission mechanism for a sheet processor contributive to the reduction of the size of the sheet processor by reducing the number of components and simplifying a constitution. <P>SOLUTION: The power transmission mechanism comprises a driving source connection member 55 connected to a motor shaft 53, and a driven rotation member 56 connected in linkage with the input shaft of a processing means. The driving source connection member 55 has a boss 57 into which the motor shaft 53 is inserted and joined, and a flange 58 which is integrally formed at one end of the boss 57. The driven rotation member 56 is rotatably fitted into the outer periphery of the boss 57 of the driving source connection member 55, and a steel ball 62 is arranged between opposed faces of the flange 58 and the driven rotation member 56. A recessed portion 63 is formed at the driven rotation member 56 for receiving and holding the steel ball 62, and a hole 60 is formed at the flange 58 for storing the steel ball 62. A coil spring 61 is arranged in the hole 60 for pressing the steel ball 62 against the recessed portion 63. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a power transmission mechanism of a paper processing apparatus, and more particularly to a technique for canceling power transmission during an overload.

  Conventionally, this type of paper processing apparatus is disclosed in Patent Document 1. As shown in FIG. 6, the sheet processing apparatus includes a paper feed unit 11 at one end of the apparatus main body 10 and a paper discharge unit 12 at the other end, and transport means 13 from the paper feed unit 11 to the paper discharge unit 12. It has. The conveying means 13 constitutes a conveying path 15 composed of a number of pairs of rollers 14.

  The transport unit 13 includes a transport drive unit (not shown) that drives the roller 14. On the transport path 15, the transport correction unit 16, the information reading unit 17, the first cutting device unit 18, and the second cutting device. Processing means such as a section 19, a third cutting apparatus section 20, a fourth cutting apparatus section 21, and a folding mold forming apparatus section 22 are provided. These are all supported by the apparatus main body 10, and these processing means are provided with a processing drive means (not shown).

  In this sheet processing apparatus, sheets are sent out one by one from a bundle of sheets placed on the sheet feeding unit 11 to the conveyance path 15. The conveyance correction unit 16 stops the conveyance of the sheet when the sheet that has been sent is skewed, or when the sheet is superimposed on two or more sheets, and when the sheet moves straight. Transport to the next process.

In the next step, the information reading means 17 reads the barcode of the paper and sends the processing information to the control means (not shown). The control means controls the subsequent processing means based on the processing information.
JP-A-2005-239307 Japanese Patent No. 3281114

  In the conventional configuration described above, the first cutting device unit 18, the second cutting device unit 19, the third cutting device unit 20, the fourth cutting device unit 21, the folding mold forming device unit 22 and the like disposed on the conveyance path 15 are provided. The machining drive means (not shown) included in the machining means employs a power transmission mechanism such as a gear drive system or a belt drive system, and the torque of the drive shaft of the motor as a drive source is applied to each machining means. It is transmitted to the driven shaft through gears, pulleys, belts and the like.

  For this reason, if the superimposition of the sheets is overlooked due to a detection malfunction of the conveyance correction unit 16 or the like, an excessive load may be applied to the drive unit of the processing unit, and the components of the drive system may be damaged. In general, a torque limiter has been proposed as a means for overloading.

  There exists a torque limiter as described in Patent Document 2, for example. This is interposed between a rotating shaft of a stepping motor that forms a driving shaft and a shaft that forms a driven shaft that is rotatably supported by a support member. A drive boss is mounted on the rotating shaft of the driving shaft, a thrust boss is mounted on the shaft of the driven shaft, a drive boss and a thrust boss are arranged with a predetermined gap, and a circle that faces the drive boss through the thrust boss Secure the plate integrally with the drive boss. A plurality of ball plungers to be mounted on the drive boss are arranged around the rotation axis at regular intervals, and the thrust boss is pressed against the disk with a ball at the tip of the ball plunger.

In this configuration, the rotational force of the driving shaft acting on the drive boss is transmitted to the thrust boss via the disk, and the thrust boss rotates the shaft.
However, since the torque limiter having such a configuration requires a shaft for the driven shaft and a support member for rotatably supporting the shaft, the number of components increases, and these components are arranged in the axial direction of the rotation shaft. Therefore, the apparatus configuration becomes large. For this reason, adopting a conventional torque limiter has a problem in reducing the size of the paper processing apparatus.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a power transmission mechanism for a paper processing apparatus that can contribute to downsizing of the paper processing apparatus by reducing the number of parts and simplifying the configuration. To do.

  In order to solve the above problems, the power transmission mechanism of the paper processing apparatus of the present invention has a paper transport path from the paper feed side to the paper discharge side, and processing means for processing the paper is arranged on the transport path. In the paper processing apparatus provided, the power transmission mechanism interposed between the input shaft of the driving system and the driving shaft of the driving source of the processing means is connected to the driving source connecting member connected to the driving shaft and the input shaft of the processing means. A driven rotation member that is interlocked and connected, and the drive source connection member has a boss portion that inserts and joins the drive shaft and a flange portion that is integrally formed at one end of the boss portion, and the driven rotation member is a boss of the drive source connection member. Is inserted into the outer periphery of the part so as to be rotatable, and a spherical body is disposed between the opposing surfaces of the flange part and the driven rotary member, and a concave part for receiving and holding the spherical body is formed on one of the flange part and the driven rotary member. And the other member has a hole that can accommodate a sphere. , Characterized in that a pressing member for pressing the spherical concave portion into the hole.

In addition, a concave portion for receiving and holding the sphere is formed on the driven rotating member, and a ball plunger having a pressing member for pressing the sphere against the concave portion is disposed in the hole portion of the flange portion.
The power transmission mechanism of the paper processing device of the present invention is a paper processing device having a paper transport path from the paper feed side to the paper discharge side, and having processing means for processing the paper disposed on the transport path. A power transmission mechanism interposed between an input shaft of a driving system and a driving shaft of a driving source included in the processing means; a driving source connecting member connected to the driving shaft; and a driven rotating member linked to the input shaft of the processing means; The drive source connecting member has a boss portion that inserts and joins the drive shaft and a flange portion that is integrally formed at one end of the boss portion, and is driven to be rotatably inserted into the outer periphery of the boss portion of the drive source connection member. The rotating member has a plate body that is movably disposed in the axial direction of the boss portion, a pressing member that presses the plate body toward the flange portion, and a main body portion that stores the pressing member. Protrusions that protrude outwards are formed, and the protrusions are locked to the main body in the direction around the axis of the boss. In addition, a notch that allows the protrusion to move in the axial direction of the boss is formed, and a sphere is disposed between the opposing surfaces of the flange and the driven rotating member, and both the flange and the driven rotating member are arranged. A concave portion for receiving and holding the sphere is formed on the surface.

  The driven rotating member is a gear, a pulley, or a sprocket.

  With the configuration described above, the driving source connecting member rotates together with the driving shaft of the driving source, and the pressing member presses the sphere against the concave portion, whereby the flange portion and the driven rotating member of the driving source connecting member rotate around the axis of the boss portion. It rotates integrally in the direction, the input shaft of the processing means is rotationally driven by the rotation of the driven rotation member, and the power is transmitted to the drive system of the processing means.

  When an excessive load acts on the drive system of the processing means due to the occurrence of double feeding of paper, etc., the sphere that receives the drag of the driven rotating member interlocked with the input shaft of the drive means of the processing means resists the pressing force of the pressing member. However, the drive source connecting member slips with respect to the driven rotating member and slips by moving backward from the concave portion of the driven rotating member while retreating into the hole portion of the flange portion, and the power transmission is stopped.

  Alternatively, the drive source connecting member rotates together with the drive shaft of the drive source, the pressing member presses the sphere against the concave portion via the plate body, and the notch portion of the plate body and the notch portion of the main body portion are the axes of the boss portion. By engaging in the direction around the center, the flange portion of the drive source connection member and the driven rotation member rotate integrally in the direction around the axis of the boss, and the input shaft of the processing means is driven to rotate by the rotation of the driven rotation member. Then, power is transmitted to the drive system of the processing means.

  When an excessive load acts on the drive system of the processing means due to the occurrence of double feeding of paper, etc., the sphere that receives the drag of the driven rotating member interlocked with the input shaft of the drive means of the processing means resists the pressing force of the pressing member. However, the drive source connecting member slips with respect to the driven rotating member and slips by moving backward from the concave portion of the flange portion while retracting into the main body portion together with the plate body, and the power transmission is stopped.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Since the basic configuration of the sheet processing apparatus is illustrated in FIG. 6, the description thereof is omitted, and a power transmission mechanism that forms a main part of the present invention will be described.

  1 to 2, the power transmission mechanism 51 includes, for example, the conveyance correction unit 16, the information reading unit 17, the first cutting device unit 18, the second cutting device unit 19, and the third cutting device in the paper processing apparatus described in FIG. 6. It is provided in processing means such as the device unit 20, the fourth cutting device unit 21, and the folding mold forming device unit 22.

  The power transmission mechanism 51 is interposed between an input shaft (not shown) of a drive system provided in the processing means and a driving shaft 53 of a motor 52 that is a driving source, and is connected to the driving shaft 53 by a key joint 54. And a driven rotation member 56 formed of a gear, a pulley, or a sprocket that is interlocked and connected to the input shaft of the processing means.

  The drive source connecting member 55 has a boss portion 57 for inserting and joining the driving shaft 53 and a flange portion 58 formed integrally with one end of the boss portion 57, and the driven rotation member 56 is connected to the boss portion of the drive source connecting member 55. The outer periphery of 57 is rotatably inserted through a slide bearing 59, and the driven rotating member 56 and the slide bearing 59 are prevented from coming off by a retaining ring 57a provided on the boss portion 57.

  A plurality of hole portions 60 are provided in the flange portion 58 at appropriate intervals, and a coil spring 61 constituting a pressing member disposed in the hole portion 60 presses the steel ball 62 that can be accommodated in the hole portion 60 toward the driven rotation member 56. To do. The driven rotating member 56 is formed with a concave portion 63 for receiving and holding the steel ball 62, and the steel ball 62 is disposed between the opposing surfaces of the flange portion 58 and the driven rotating member 56.

  In the present embodiment, the hole portion 60 is formed in the flange portion 58 and the coil spring 61 is disposed, and the concave portion 63 is formed in the driven rotation member 56. However, the concave portion 63 is formed in the flange portion 58, and the driven rotation member is formed. It is also possible to form the hole 60 in 56 and arrange the coil spring 61.

It is also possible to arrange a ball plunger provided with a steel ball 62 and a coil spring 61 in the hole 60.
With the configuration described above, the drive source connecting member 55 rotates with the driving shaft 53 by driving the motor 52, and the rotational force of the drive source connecting member 55 is transmitted to the driven rotating member 56 via the steel ball 62. That is, the steel ball 62 in the hole 60 is pressed by the coil spring 61 to engage with the concave portion 62, and the flange portion 58 of the drive source connection member 55 and the driven rotation member 56 are in the direction around the axis of the boss portion 57. Rotates integrally. The input shaft of the machining means is rotated by the rotation of the driven rotation member 56, and power is transmitted to the drive system of the machining means.

  Due to the occurrence of double feeding of the paper, the conveyance correction means 16, the information reading means 17, the first cutting device unit 18, the second cutting device unit 19, the third cutting device unit 20, the fourth cutting device unit 21 in the paper processing device, An excessive load may act on the drive system of the processing means such as the folding mold forming unit 22.

  At this time, the steel ball 62 that receives the drag of the driven rotating member 56 linked to the input shaft of the driving system of the machining means is driven to rotate while retracting into the hole 60 of the flange 58 while resisting the pressing force of the coil spring 61. By detaching from the concave portion 63 of the member 56, the drive source connecting member 55 slips and idles with respect to the driven rotating member 56, and the power transmission stops.

For this reason, it is possible to realize a power transmission mechanism including a torque limiter mechanism with a simple configuration in which the number of parts is reduced, and it is possible to contribute to downsizing of the paper processing apparatus.
3 to 5 show another embodiment of the present invention. 3 to 5, a power transmission mechanism 71 is interposed between an input shaft (not shown) of a drive system provided in the processing means and a drive shaft 53 of a motor 52 as a drive source. A drive source connecting member 73 connected to the base 53 by a bolt stop 72 and a driven rotating member 74 connected to the input shaft of the processing means are provided.

  The drive source connection member 73 has a boss portion 75 for inserting and joining the driving shaft 53 and a flange portion 76 integrally formed at one end of the boss portion 75, and the driven rotation member 74 is rotatably inserted on the outer periphery of the boss portion 75. It is fitted.

  The driven rotation member 74 includes a plate body 77 that is movably disposed in the axial direction of the boss portion 75, a coil spring 78 that forms a pressing member that presses the plate body 77 toward the flange portion 76, and the coil spring 78 and the plate body 77. It has a main body 79 for storing. The main body 79 is composed of a gear, a pulley, or a sprocket, and is rotatably fitted to the outer periphery of the boss 75 via a slide bearing 80. The driven rotation member 74 and the slide bearing 80 are attached by a retaining ring 75a provided on the boss 75. It is retaining.

  The plate body 77 has a protruding portion 77 a that protrudes outward in the radial direction, the main body portion 79 has a cutout portion 81 at the peripheral edge of the opening, and the cutout portion 81 causes the protruding portion 77 a to be the axial center of the boss portion 75. In addition to locking in the turning direction, the protrusion 77 a is allowed to move in the axial direction of the boss 75. A steel ball 82 is disposed between the opposing surfaces of the flange portion 76 and the plate body 77 of the driven rotation member 74, and concave portions 83 and 84 for receiving and holding the steel ball 82 are formed on both the flange portion 76 and the plate body 77. ing.

  With the configuration described above, the drive source connection member 73 rotates together with the drive shaft 53 by driving the motor 52, and the rotational force of the drive source connection member 73 is transmitted to the driven rotation member 74 via the steel ball 82. That is, the steel ball 82 is pressed by the coil spring 78 through the plate body 77 and engages with the concave portions 83 and 84, and the flange portion 76 of the drive source connection member 73 and the plate body 77 and the main body portion 79 of the driven rotation member 74. Rotates in the direction around the axis of the boss 75. The input shaft of the machining means is rotated by the rotation of the driven rotation member 74, and power is transmitted to the drive system of the machining means.

  Due to the occurrence of double feeding of the paper, the conveyance correction means 16, the information reading means 17, the first cutting device unit 18, the second cutting device unit 19, the third cutting device unit 20, the fourth cutting device unit 21 in the paper processing device, An excessive load may act on the drive system of the processing means such as the folding mold forming unit 22.

  At this time, the steel ball 82 receiving the drag of the driven rotating member 74 interlocked with the input shaft of the drive system of the processing means retreats into the main body 79 together with the plate 77 while resisting the pressing force of the coil spring 78. The drive source connecting member 73 slips with respect to the driven rotation member 74 and idles by slipping out of the concave portion 83 of 76, and power transmission stops.

  For this reason, it is possible to realize a power transmission mechanism including a torque limiter mechanism with a simple configuration in which the number of parts is reduced, which can contribute to downsizing of the paper processing apparatus.

Sectional drawing which shows the power transmission mechanism in embodiment of this invention The expanded sectional view of the power transmission mechanism in the embodiment The expanded sectional view which shows the power transmission mechanism in other embodiment of this invention Front view of the power transmission mechanism in the same embodiment The principal part enlarged view of the power transmission mechanism in the same embodiment Schematic diagram showing the configuration of a conventional paper processing device

Explanation of symbols

DESCRIPTION OF SYMBOLS 51 Power transmission mechanism 52 Motor 53 Driving shaft 54 Key connection 55 Drive source connection member 56 Driven rotation member 57 Boss part 57a Retaining ring 58 Flange part 59 Slide bearing 60 Hole part 61 Coil spring 62 Steel ball 63 Concave part 71 Power transmission mechanism 72 Bolt Stop 73 Drive source connecting member 74 Driven rotation member 75 Boss portion 75a Retaining ring 76 Flange portion 77 Plate body 77a Protruding portion 78 Coil spring 79 Body portion 80 Slide bearing 81 Notch portion 82 Steel ball 83, 84 Concave portion

Claims (4)

In a paper processing apparatus having a paper transport path from the paper feed side to the paper discharge side, and processing means for processing the paper is arranged on the transport path, the input shaft of the drive system and the driving source of the drive source of the processing means The power transmission mechanism interposed between the shaft includes a drive source connecting member coupled to the driving shaft and a driven rotating member coupled to the input shaft of the processing means, and the driving source connecting member inserts and joins the driving shaft. A boss portion and a flange portion integrally formed at one end of the boss portion, and the driven rotation member is rotatably inserted on the outer periphery of the boss portion of the drive source connection member, and between the opposing surfaces of the flange portion and the driven rotation member A spherical portion is disposed on the concave portion, and a concave portion that receives and holds the spherical body is formed on one of the flange portion and the driven rotating member, and a hole portion that can receive the spherical body is formed on the other member. A pressing member that presses the concave portion is disposed. A power transmission mechanism of the paper processing equipment. 2. The paper according to claim 1, wherein a concave portion for receiving and holding the sphere is formed on the driven rotating member, and a ball plunger having a pressing member for pressing the sphere against the concave portion is disposed in the hole portion of the flange portion. Power transmission mechanism for processing equipment. In a paper processing apparatus having a paper transport path from the paper feed side to the paper discharge side, and processing means for processing the paper is arranged on the transport path, the input shaft of the drive system and the driving source of the drive source of the processing means The power transmission mechanism interposed between the shaft includes a drive source connecting member coupled to the driving shaft and a driven rotating member coupled to the input shaft of the processing means, and the driving source connecting member inserts and joins the driving shaft. A driven rotating member that has a boss part and a flange part integrally formed at one end of the boss part and is rotatably fitted on the outer periphery of the boss part of the drive source connecting member is movable in the axial direction of the boss part. A plate body to be arranged, a pressing member that presses the plate body toward the flange portion, and a main body portion that stores the pressing member, and a protruding portion that protrudes radially outward is formed on the plate body. The boss is locked in the direction around the axis of the boss, and the protrusion moves in the direction of the axis of the boss. Forming a notch that allows it to be placed, placing a sphere between the opposing surfaces of the flange and the driven rotating member, and forming a recessed portion that receives and holds the sphere on both the flange and the driven rotating member. A power transmission mechanism for a paper processing apparatus. The power transmission mechanism of the paper processing apparatus according to any one of claims 1 to 3, wherein the driven rotation member is a gear, a pulley, or a sprocket.

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