JP2007098546A - Punch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punch device capable of reducing punching sounds or the device vibration noises, decreasing the punching load, and making the device construction compact. <P>SOLUTION: The punch device 1 is equipped with a driving mechanism 10, a punch body 20, and a paper sheet guide member 30. The punch body 20 is furnished with a punching rod 40 furnished at one end with a punching blade 42 and and at the peripheral surface with a pin 44 protruding outward in the radial direction and a rod guide member 21 furnished with a pin guide 21a where the pin 44 is inserted and engaged. That end of the pin guide 21a on the side in the punching direction of the punching rod is oriented so that the punching rod 40 having moved in the punching direction along the pin guide 21a will rotate round the axis while it further moves in the punching direction after the punching blade 42 abuts to the sheet. Accordingly the punching is performed while the punching rod 40 in rotation cuts the sheet, and it is possible to reduce the punching sound on the moment the punching motion is completed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a punching device for paper such as cut paper, which can be applied to an image forming apparatus represented by a copying machine and a printer, and a paper post-processing device connected to the image forming apparatus.

  In recent image forming apparatuses such as copying machines and printers, various options and operations can be performed on printed paper by providing an optional device as an integral unit or connecting a paper post-processing device. It is. Developed and commercialized optional devices for printed paper, such as sorters that sort by number, size, and user, staplers that perform stapling on paper, and punching devices that punch filing holes on paper Has been.

Examples of the punching device among the above-described optional devices of the image forming apparatus can be seen in Patent Documents 1 and 2. In the punching device (punch device) of Patent Documents 1 and 2, a punching rod is punched in a sheet by reciprocating a punching rod by rotating an eccentric cam with a driving device. As another typical drilling device, there is one that reciprocates a punching rod by a crank mechanism.
JP 2001-25997 A (page 4, FIG. 1) JP 2001-26370 A (page 4, FIG. 4)

  However, as with the punching device (punch device) described in Patent Documents 1 and 2, there is a possibility that the punching sound at the moment when the punching operation is completed becomes very loud if the punching rod is simply reciprocated. is there. And such a cam mechanism also has a loud driving sound related to the reciprocating movement of the punching rod. Furthermore, since the load during the drilling operation is increased, the apparatus is adversely affected, and there is a high possibility of causing a failure such as damage to the apparatus. In addition, the cam portion of the punching device (punch device) described in Patent Documents 1 and 2 and the crank portion of another typical punching device may cause an increase in the size of the device.

  The present invention has been made in view of the above points, and provides a high-performance drilling device in which drilling sound related to the punching operation and driving sound of the device are reduced, drilling load is reduced, and the device is further downsized. For the purpose.

  In order to solve the above-described problems, the present invention is provided with a punching rod provided with a punch blade portion at one end, a pin protruding radially outward on a peripheral surface, and a pin guide through which the pin is inserted and engaged. The pin guide has an end portion on the punching rod perforation direction side, the punching rod is guided by the pin and the pin guide and moves in the perforation direction, and the punch blade portion serves as an object to be perforated. After the contact, the direction of rotation around the axis is directed while moving further in the drilling direction.

  In the punching device having the above-described configuration, the punching rod includes a screw portion extending in the axial direction, and a rotating body that engages with the screw portion and rotates about the axis relative to the punching rod, and the rotating body And the punching rod is guided by the pin and the pin guide when the punching rod rotates relative to the rotating body rotated by the drive mechanism via the screw portion. It was decided to reciprocate to the drilling completion position and the retreat position.

  Further, in the punching device having the above-described configuration, the punch blade portion is configured by two blades that protrude in the axial direction from the punching rod main body and are opposed to each other across the axis, and punches in a region from the tip of the blade to the side edge. It was decided that the object could be cut.

  In the punching device having the above-described configuration, the punching rod has a moving speed from the drilling completion position to the retracting position with respect to the drilling target is faster than a moving speed from the retracting position to the drilling completion position.

  According to the configuration of the present invention, a punching rod provided with a punch blade portion at one end and a pin protruding radially outward on a peripheral surface, and a guide member provided with a pin guide through which the pin is inserted and engaged The pin guide has an end on the punching rod perforation direction side, the punching rod is guided by the pin and the pin guide and moves in the perforation direction, and the punch blade portion abuts on the object to be perforated, and further in the perforation direction. Since it is oriented in the direction that rotates around the axis while moving to, when performing the punching operation with the punching rod, the object to be drilled can be cut and punched while rotating the punching rod. It becomes possible. Thereby, the drilling sound at the moment when the drilling operation is completed can be greatly reduced. Furthermore, the load during the drilling operation can be reduced. Therefore, it is possible to obtain a perforation apparatus in which the perforation sound related to the perforation operation is reduced and the perforation load is reduced.

  The punching rod includes a screw portion extending in the axial direction, and includes a rotating body that engages with the screw portion and rotates about the axis relative to the punching rod, and a driving mechanism that rotates the rotating body. The punching rod is reciprocated to the drilling completion position and the retraction position guided by the pin and the pin guide when the punching rod rotates relative to the rotating body rotated by the driving mechanism via the screw portion; As a result, it is possible to reduce the driving noise associated with the reciprocating movement of the punching rod, compared to a conventional cam mechanism or the like. Furthermore, the device can be made compact without the need for a cam portion or a crank portion. Therefore, the drive sound of the apparatus can be reduced and the apparatus can be made compact, and a higher-performance drilling apparatus can be obtained.

  Further, the punch blade portion is configured by two blades that protrude in the axial direction from the punching rod main body and are opposed to each other with the axis interposed therebetween, and the punched object can be cut in a region from the tip of the blade to the side edge. Therefore, even when the punching rod rotates and moves in the drilling direction, the object to be drilled can be easily cut and punched. Therefore, it is possible to further improve the reduction of the drilling sound related to the drilling operation and the reduction of the drilling load.

  In addition, since the moving speed of the punching rod from the drilling completion position to the retracting position with respect to the drilling object is faster than the moving speed from the retracting position to the drilling completion position, it takes a longer time for drilling per unit time. be able to. As a result, it is possible to obtain a high-performance drilling apparatus in which the drilling sound related to the drilling operation, the driving sound of the apparatus, and the drilling load are further reduced.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  First, the outline of the structure of the perforation apparatus according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a partial vertical sectional front view of the punching device, and FIG. 2 is a top view of the punching device.

  As shown in FIGS. 1 and 2, the punching device 1 includes a drive mechanism 10, a punch body 20, and a paper guide member 30.

  The drive mechanism 10 includes a motor 11, a drive pulley 12, and a plurality of belts 13. The motor 11 and the drive pulley 12 are provided close to each other with their axes parallel to each other. And the motor 11 is connected with the driven gear 12a with which the drive pulley 12 was equipped via the drive gear 11a. A belt 13 is wound around the drive pulley 12 and the punch body 20. Thus, when the motor 11 is driven, the drive pulley 12 rotates and the punch body 20 operates via the belt 13.

  As shown in FIG. 2, four punch bodies 20 are provided in series at equal intervals, and each is connected by a plurality of belts 13. Accordingly, four punch bodies 20 can be operated simultaneously by one motor 11.

  A paper guide member 30 is provided below the punch body 20 as shown in FIG. The paper guide member 30 includes an upper paper guide 31 and a lower paper guide 32. A sheet as a punching object is inserted into the gap S between the upper sheet guide 31 and the lower sheet guide 32, and a punch hole is punched by the punch body 20. The motor 11, the drive pulley 12, and the punch main body 20 are attached to and supported by the upper paper guide 31.

  Next, a detailed configuration of the punch body 20 will be described with reference to FIGS. 3 is a side view of the punch body, and FIG. 4 is a vertical sectional view of the punch body shown in FIG. FIG. 5 is a front view of the punching rod, and FIG. 6 is a bottom view of the punching rod. FIG. 5 shows a state in which the punching rod shown in FIG. 4 is rotated 90 degrees around the axis. Further, FIG. 6 omits drawing of two pins protruding from the peripheral surface of the punching rod.

  As shown in FIGS. 3 and 4, the punch body 20 is provided above the upper sheet guide 31. The punch body 20 includes a punching rod 40, a rod guide member 21, a driven pulley 22 that is a rotating body, and a bush 23.

  The punching rod 40 is provided at the center of the punch body 20 and is arranged with its axis substantially vertical. As shown in FIGS. 4 and 5, the punching rod 40 includes a punch blade portion 42, a screw portion 43, and a pin 44 in the rod main body 41.

  The punch blade portion 42 is provided at the lower end of the rod body 41. As shown in FIGS. 5 and 6, the punch blade portion 42 is configured by two blades 42 a that protrude further downward from the rod body 41 in the axial direction and face each other across the axis. The blade 42a has a sharp shape in a region from the front end 42b to the side end 42c so that the paper that is the perforation target can be cut.

  The screw portion 43 is provided on the upper portion of the rod body 41. The screw portion 43 extends in the axial direction of the rod body 41. The screw part 43 engages with the driven pulley 22 of the punch body 20 (see FIG. 4).

  The pin 44 is provided immediately below the screw portion 43. The pins 44 extend from the peripheral surface of the rod body 41 so as to protrude outward in the radial direction by a predetermined length. As shown in FIG. 5, two pins 44 are provided, and are arranged on the same radial line so as to be symmetrical with respect to the axis of the rod body 41.

  As shown in FIGS. 3 and 4, the rod guide member 21 has a sleeve shape and is fixed to the upper surface of the upper sheet guide 31 so as not to rotate with its axis substantially vertical. Inside the rod guide member 21, the punching rod 40 is arranged with the axes of each other aligned. A pin guide 21 a is provided on the peripheral surface of the rod guide member 21. The pin guide 21 a has a slit shape penetrating from the inside to the outside of the rod guide member 21. The pin guide 21a has a shape in which the upper part is parallel to the axis of the rod guide member 21 and the lower part rotates in the circumferential direction while facing downward. The pin guide 21a is provided at two locations that are point-symmetric with respect to the axis as viewed from the axial direction. When the punching rod 40 is disposed inside the rod guide member 21, the pin 44 of the punching rod 40 is inserted into the pin guide 21a. Therefore, the punching rod 40 is restricted from moving in the axial direction, that is, in the vertical direction and rotating around the axial line by the pin 44 and the pin guide 21a.

  As shown in FIGS. 3 and 4, the driven pulley 22, which is a rotating body, is disposed above the rod guide member 21 with the axis thereof being substantially vertical. The axis of the driven pulley 22 coincides with the axis of the rod guide member 21 and the punching rod 40. The peripheral surface of the driven pulley 22 is provided with two belt grooves 22 a arranged side by side so that two belts 13 can be wound around. As a result, the driven pulley 22 is rotated by the drive mechanism 10. A through hole 22 b through which the punching rod 40 is inserted is provided at the axial line portion of the driven pulley 22. An internal thread is engraved on the inner surface of the through hole 22 b and engages with the threaded portion 43 of the punching rod 40. Therefore, the driven pulley 22 and the punching rod 40 both rotate relatively around the axis via the screw portion 43.

  As shown in FIG. 4, the bush 23 is arranged at the lower inner side of the rod guide member 21 with its axis substantially vertical. The axis of the bush 23 coincides with the axis of the rod guide member 21 and the punching rod 40. A through hole 23 a through which the punching rod 40 is inserted is provided at an axial line portion of the bush 23. A lower portion of the punching rod 40, that is, a portion that hangs from the punch blade portion 42 to the lower portion of the rod main body 41 is inserted into the through hole 23a. The lower end of the through hole 23 a communicates with the gap S between the upper sheet guide 31 and the lower sheet guide 32.

  As shown in FIG. 4, the lower paper guide 32 provided below the bush 23 is provided with a through hole 32 a having the same diameter as the through hole 23 a of the bush 23.

  Next, the operation of the perforating apparatus 1 having the above configuration will be described with reference to FIGS. 7 and 8 in addition to FIGS. FIG. 7 is a side view of the punch main body similar to FIG. 3 and shows a state in the middle of the punching operation, and FIG. 8 is a side view of the punch main body similar to FIG. .

  The punch main body 20 of the punching device 1 shown in FIGS. 3 and 4 shows a state before the punching operation. The punching rod 40 is at the uppermost position, that is, at the retracted position, and the punch blade portion 42 is not exposed in the gap S between the upper sheet guide 31 and the lower sheet guide 32. In this state, the sheet can be inserted into the gap S.

  Subsequently, when the driving mechanism 10 shown in FIGS. 1 and 2 is driven to perform the punching operation by the punching device 1, the drive pulley 12 is rotated by the motor 11, and the power is transmitted to the belt 13. Then, the driven pulley 22 of the punch body 20 shown in FIGS. 3 and 4 is rotated via the belt 13.

  Here, the driven pulley 22 rotated by the belt 13 of the drive mechanism 10 is engaged with the punching rod 40 via the screw portion 43 as described above. The punching rod 40 is restricted from moving in the axial direction, that is, up and down, and rotating around the axis by the pin 44 and the pin guide 21 a of the rod guide member 21. Therefore, when the driven pulley 22 rotates, the punching rod 40 does not rotate with respect to the rod guide member 21 but rotates around the axis line relative to the driven pulley 22 via the screw portion 43. It is guided by 44 and the pin guide 21a, and moves downward in the axial direction that is the drilling direction.

  When the driven pulley 22 continues to rotate, the punching rod 40 further moves downward in the axial direction, which is the punching direction, and as shown in FIG. 7, reaches the gap S where the punch blade portion 42 abuts against a sheet (not shown). . From here, the pin guide 21a has a shape rotated in the circumferential direction with its lower portion facing downward. Therefore, the punching rod 40 rotates around the axis while the punch blade portion 42 abuts against the paper and is guided by the pin 44 and the pin guide 21a to move downward in the axial direction as the punching direction. .

  As shown in FIG. 8, when the pin 44 of the punching rod 40 reaches the lowest end of the pin guide 21a, the downward movement of the punching rod 40 in the axial direction and the rotation around the axis are stopped, and the drilling is completed. Since the drive mechanism 10 is provided with an overload protection device such as a torque limiter (not shown), even if the punching rod 40 is restricted from moving and rotating at the drilling completion position shown in FIG. There is no participation. Thereafter, the rotation of the motor 11 is stopped.

  Next, when the punching rod 40 is moved from the drilling completion position shown in FIG. 8 to the retracted position shown in FIG. 3, the motor 11 of the drive mechanism 10 is rotated in the direction opposite to that during the drilling operation. As a result, the punching rod 40 is guided by the pin 44 and the pin guide 21a and moves upward in the axial direction, which is the retracting direction, in the same manner as the drilling operation.

  In the punching operation of the punch main body 20 as described above, the moving speed of the punching rod 40 from the punching completion position to the retracting position with respect to the paper as the punching target is faster than the moving speed from the retracting position to the punching completion position. The drive mechanism 10 is controlled so that it becomes.

  In this way, the punch blade portion 42 is provided at one end, the punching rod 40 provided with the pin 44 protruding radially outward on the peripheral surface, and the guide provided with the pin guide 21a through which the pin 44 is inserted and engaged. Rod guide member 21 as a member, and the pin guide 21a has a lower end which is an end portion on the punching rod perforation direction side, and the punching rod 40 is guided by the pin 44 and the pin guide 21a to move in the perforation direction. When the punching rod 40 performs the punching operation by the punching rod 40, the punch blade 42 is directed in the direction of rotating around the axis while moving in the punching direction after contacting the paper as the punching object. The sheet can be cut and punched while the punching rod 40 is rotated. Thereby, the drilling sound at the moment when the drilling operation is completed can be greatly reduced. Furthermore, the load during the drilling operation can be reduced. Therefore, it is possible to obtain the punching device 1 in which the punching sound related to the punching operation is reduced and the punching load is reduced.

  The punching rod 40 includes a threaded portion 43 extending in the axial direction, and the driven pulley 22 that is a rotating body that engages with the threaded portion 43 and rotates about the axial line relative to the punching rod 40, and the driven pulley. A driving mechanism 10 that rotates the pulley 22, and when the punching rod 40 rotates relative to the driven pulley 22 that is rotated by the driving mechanism 10 via the screw portion 43, the pin 44 and the pin guide 21a and reciprocates to the drilling completion position and the retreat position, so that it is possible to reduce the drive sound related to the reciprocating movement of the punching rod 40 as compared with a conventional cam mechanism or the like. Furthermore, the device can be made compact without the need for a cam portion or a crank portion. Therefore, the drive sound of the apparatus can be reduced, the apparatus can be made compact, and the perforating apparatus 1 with higher performance can be obtained.

  The punch blade 42 is composed of two blades 42a that protrude in the axial direction from the punching rod main body 41 and face each other across the axis, and the sheet is cut in the region from the tip 42b to the side end 42c of the blade 42a. Therefore, even when the punching rod 40 rotates and moves in the punching direction, the paper can be easily cut and punched. Therefore, it is possible to further improve the reduction of the drilling sound related to the drilling operation and the reduction of the drilling load.

  Further, since the moving speed of the punching rod 40 from the drilling completion position to the retracting position with respect to the drilling target is faster than the moving speed from the retracting position to the drilling completion position, it is possible to take a longer time for drilling per unit time. it can. As a result, it is possible to obtain a high-performance drilling device 1 in which the drilling sound related to the drilling operation, the driving sound of the device, and the drilling load are further reduced.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  For example, in this embodiment, the punching rod 40 is moved by the motor 11, the belt 13, and the driven pulley 22, but the moving mechanism of the punching rod 40 is not limited to this, and the driven pulley 22 is moved to the punching rod 40. Instead of the gear, which is a rotating body whose axes coincide with each other, it may be moved by a gear mechanism. In addition, four punch bodies 20 are provided in series at equal intervals, but the present invention is not limited to this, and the number and arrangement of the punch bodies 20 can be changed.

  The present invention can be used in general drilling apparatuses.

It is a partial vertical section front view of the perforation apparatus concerning the embodiment of the present invention. FIG. 2 is a top view of the punching device of FIG. 1. It is a side view of the punch main body shown in FIG. FIG. 4 is a vertical sectional view of the punch body shown in FIG. 3. It is a front view of the punching rod shown in FIG. It is a bottom view of the punching rod of FIG. FIG. 5 is a side view of the punch main body similar to FIG. 3 and shows a state in the middle of the punching operation. FIG. 4 is a side view of the punch body similar to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drilling apparatus 10 Drive mechanism 11 Motor 12 Drive pulley 13 Belt 20 Punch main body 21 Rod guide member (guide member)
21a Pin guide 22 Driven pulley (rotary body)
22b Through hole 30 Paper guide member 40 Punching rod 41 Rod body 42 Punch blade part 42a Blade 42b (Blade) tip 42c (Blade) side end 43 Screw part 44 Pin

Claims (4)

A punch blade at one end, a punching rod provided with a pin projecting radially outward on the peripheral surface, and a guide member provided with a pin guide through which the pin is inserted and engaged,
The end of the pin guide on the punching rod perforation direction side is guided by the pin and the pin guide and moved in the perforation direction. A piercing device characterized by directing in a direction that rotates around an axis while moving to the right. The punching rod includes a screw portion extending in the axial direction, and includes a rotating body that engages with the screw portion and rotates about the axis relative to the punching rod, and a drive mechanism that rotates the rotating body.
When the punching rod rotates relative to the rotating body rotated by the drive mechanism via the screw portion, the punching rod is guided by the pin and the pin guide to reciprocate to a drilling completion position and a retraction position. The perforating apparatus according to claim 1, wherein:   The punch blade portion is configured by two blades that protrude in the axial direction from the punching rod body and are opposed to each other with the axis interposed therebetween, and the punching target can be cut in a region from the tip of the blade to the side edge. The perforation apparatus according to claim 1 or 2, characterized by the above.   4. The punching rod according to claim 1, wherein a moving speed of the punching object from the drilling completion position to the retracting position is faster than a moving speed from the retracting position to the drilling completion position. The perforating apparatus according to 1.

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