JP2005088156A - Sheet material punching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small, compact sheet material punching device with a specification having punches located near to each other. <P>SOLUTION: A sheet material punching device for forming a row of holes by cooperatively operating reciprocating punches and die holes corresponding with the punches comprises a punch holding link having at least tow punches and freely rotatable about with a fulcrum, a cam member connected to a power point side of the punch holding link through a cam groove and a drive section for driving the cam member to impart rotational motion to the punch holding link, and the two or more punches are arranged side by side in a longitudinal direction of the punch holding link, and the drive section drives the punch holding link approximately in the longitudinal direction of the punch holding link to slide the cam member against the punch holding link. Preferably, the cam member is freely rotatable about the cam member fulcrum. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention belongs to the technical field of a sheet material punching device in which a punch and a die hole cooperate to punch a sheet material.

Conventionally, as an example of an apparatus for punching holes for filing, as disclosed in Patent Document 1, a sheet material punching apparatus including a punch and a die that are slidably guided by a punch guide and reciprocated by a cam It has been known. These apparatuses have the same number of punches and dies as the number of perforated holes, and cams that press the punches are arranged at positions corresponding to the punches, respectively, and the same number of cams as the number of holes is required.
Further, as a device for punching a binding hole of a copied sheet or the like, a reciprocating punching device (for example, Patent Document 2, Patent Document 3, etc.) that punches by inserting a linearly moving punch into a die hole is known. Yes.
All of these reciprocating type punching apparatuses drill a punch by linearly driving the punch by rotating a rotary disk cam.

Further, as disclosed in Patent Document 4 and Patent Document 5, a cam member having a plurality of cams is operated in a direction crossing the punch, and the punch corresponding to the cam is operated to cooperate with the die to make the sheet. As a structure for punching a material, a sheet material punching device in which a dimension of the punching device in the sheet passing direction is reduced is known.
JP-A-3-22859 JP-A-5-29700 Japanese Patent Laid-Open No. 10-180693 JP 2001-9791 A JP 2001-171900 A

However, when the above-mentioned punch is driven by a rotating disk cam, a coil spring for returning the punch after punching, a cam follower, etc. must be provided, and the number of components and the external dimensions become large. There was a problem that it was difficult to reduce the size of the processing apparatus. Further, since the rotating portion of the punch drive cam is exposed, a covering cover for the cam portion is necessary, and it is difficult to further reduce the size of the apparatus.
Further, in the punching device that operates the cam member having a plurality of cams corresponding to the punch in the direction intersecting the punch, the cam member receives the punching reaction force of the punch, and therefore the cam member has sufficient strength to support the reaction force. Is required.
In addition, a method of organizing filing holes in a document and storing them in a file is performed all over the world, but the size, position, and number of holes differ depending on the region. In Japan, two holes are the mainstream, but in Europe and the United States, there are a variety of holes, such as 2, 3 or 4 holes. In particular, Sweden has a special specification of 4 holes with 2 close holes.
If the distance between adjacent punches is shortened, the strength needs to be further increased, the weight increases, and a large driving force is required.

  Accordingly, an object of the present invention is to solve the above-described problems and to provide a small and compact sheet material punching device even in a specification in which punches are close to each other.

The present invention is a sheet material punching device that forms a hole row in a sheet material in cooperation with a reciprocating punch and a die hole corresponding to the punch, and two or more punches are installed and freely rotatable around a fulcrum. A punch holding link provided on the punch holding link, a cam member connected to a force point side of the punch holding link via a cam surface, and a drive unit that drives the cam member to impart a rotation to the punch holding link. The two or more punches are installed side by side in the longitudinal direction of the punch holding link, and the drive unit is a sheet material punching device that drives in the substantially longitudinal direction of the punch holding link to slide the cam member on the punch holding link.
In the present invention, the cam member is preferably provided so as to be rotatable around a cam member fulcrum.

  According to the present invention, it is possible to provide a small and compact sheet material punching device in which the pitch between punches is short and the punches are close to each other.

In order to reduce the size and weight of the drilling device, the present inventors (1) take the driving force in the direction of the hole array of the drilling device and receive the reaction force of the drilling at the rotation fulcrum like a lever. (2) By connecting adjacent punches to one lever rod, that is, a punch holding link defined in the present invention, and connecting a plurality of punches with a member corresponding to the lever rod movement, The inventors have found that it is possible to drive adjacent punches, and have studied the optimum configuration for further miniaturization, and reached the present invention.
First, it demonstrates in detail using FIG. 1 and FIG. 2 showing an example of the basic element of this invention.

FIG. 1 shows an example in which two punches 1a and 1b are driven. Each punch is mounted side by side in the longitudinal direction of the punch holding link 40 so as to correspond to the die holes 13a and 13b. The fulcrum 41 is attached to be rotatable. The force point side of the punch holding link 40 is connected to a cam 50 that is a cam member via a cam groove 51 that forms a cam surface.
The cam 50 is installed so as to be rotatable about a cam member fulcrum 53.
From the punch standby state of FIG. 1 having such a configuration, the cam 50 is moved in the direction B, that is, in the substantially longitudinal direction of the punch holding link 40 by a drive unit (not shown). Then, the cam groove 51 and the punch holding link 40 slide, and the punch holding link 40 rotates counterclockwise around the fulcrum 41.

By doing so, the punches 1a and 1b are pushed downward by the rotation of the punch holding link 40, and eventually reach the position shown in FIG. 2, that is, the position where the punch 1a is inserted into the die hole 13a. Actually, since the material to be perforated has a thickness, the perforation starts near the position immediately before the position shown in FIG.
When the operation further proceeds from the state shown in FIG. 2, a position where the punch 1b and the die hole 13b are inserted next is reached, and a second hole is drilled. And it can return to the state of FIG. 1 by operating in the direction opposite to the B direction of FIG. 1 after drilling.

  As described above, according to the present invention, by arranging two or more punches on the punch holding link, reliable punching can be performed with a simple structure. Further, as described with reference to FIGS. 1 and 2, the operation direction of each element from the drive unit may be on the plane of the drawing including the rotation operation. As a result, the thickness of the device in the front and back direction of the drawing can be reduced, and the sheet material conveying direction (front and back direction in FIG. 1) which is most concerned when incorporated into various printers, copiers and post-processing devices, etc. is increased. Has the advantage that can be avoided.

In the example of FIG. 1, the cam member is exemplified as a structure provided to be rotatable around the cam member fulcrum. However, in order to give the same rotation to the punch holding link, the cam member is not necessarily provided. The cam member may not be a pivot member having a fulcrum. For example, there is a method in which the cam member is linearly moved substantially in the longitudinal direction of the punch holding link. However, since the cam member receives the reaction force of the punch at the time of drilling, a member for pressing the cam member is required. With the structure having the cam member fulcrum as shown in FIG. 1, the reaction force of the punch received by the cam member can be combined with the member that supports the cam member fulcrum and the member that presses the cam member to which the force is applied. That is, there is an advantage that it is not necessary to separately install a member for pressing the cam member that has received the reaction force.
Moreover, as shown in FIG. 1 and FIG. 2, the punch holding link 40 and the punches 1a and 1b are installed through long holes to prevent the punch from making a circular motion and to ensure a linear motion. desirable.
1 and 2 have been described with reference to an example of a basic element for showing a basic operation. However, in order to perform a highly accurate drilling operation, for example, it is effective to attach a guide to the punch.

Next, an example configured as a more specific sheet material punching device will be described.
FIG. 3 is a cross-sectional view showing the configuration of the sheet material punching device of the embodiment, FIGS. 4 and 5 are explanatory cross-sectional views of the cam member and the punch holding link portion, and FIG. 6 is a cross-sectional view of another embodiment.
A guide frame 10 serving as a main body of the sheet material punching device of the present invention is configured as a beam having a box-shaped cross section by connecting a lower frame 101 and an upper frame 102 facing each other at both ends. Holes 12a, 12b, 12c, 12d and 22a, 22b, 22c, 22d for holding the punches 1a, 1b, 1c, 1d are provided through the lower back surface of the lower frame 101 and the upper back surface of the upper frame 102, respectively. Yes.

  The guide holes 12 and 22 provided in the guide frame 10 are arranged at intervals between holes to be drilled, and the holes 12a, 12b, 12c and 12d provided in the lower frame 101 are burred toward the inside of the co-shaped section. . The inner diameter of the guide holes 12 and 22 is finished to a diameter that can secure an appropriate clearance so that the outer periphery of the punch 1 can slide, and supports the punch 1 so as to be slidable. The clearance is about 5 to 30 microns, preferably about 5 to 15 microns. The burring holes of the holes 12a, 12b, 12c, and 12d may be formed by caulking or the like as a separate part that becomes a flange toward the inside of the box. However, in order to improve the axial accuracy of the guide holes 12 and 22 Therefore, it is preferable that the lower frame 101 is provided with a burring.

  The die frame 31 is provided with die holes 13a, 13b, 13c, and 13d at the drilling positions. The die frame 31 and the guide lower frame 101 are formed with a sheet passing port 6 so that the positions of the guide holes 12 and 22 correspond to the die hole 13, and both ends are connected by rivets 70.

The punch holding links 40a and 40b are pivotally supported so that their fulcrums 41a and 41b can be swung by fulcrum pins 80 provided on the lower frame 101. The punch holding links 40a are punches 1a and 1b, and the punch holding links 40b are punches. 1c and 1d are attached by pins 2a, 2b, 2c and 2d, respectively.
The punch holding links 40a and 40b are connected to cams 50a and 50b via pins 2a and 2c to which the punches 1a and 1c are attached, respectively.
In the embodiment of FIG. 4, the pin that connects the punch holding link 40 and the cam 50 is also used as the pin 2a to which the punch 1a is attached. However, as shown in FIG. 6, the punch holding link 40 and the cam 50 are connected. A dedicated pin 200 may be provided separately. However, since the number of parts increases, as shown in FIG. 4, it is preferable that the pin connecting the punch holding link 40 and the cam 50 is also used as the pin 2a to which the punch 1a is attached.

As shown in FIG. 4, the cam 50 has a cam member fulcrum 53 provided on the lower frame 101, and is connected to the punch holding link 40 by a pin 2 a slidably moved in the cam groove 51. 52 is slidably connected to the groove 61 of the drive link 60.
The drive link 60 is slidably installed inside the guide frame 10, and is slid in the longitudinal direction of the guide frame 10 by a drive unit (not shown).

Next, the operation will be described.
In the standby state shown in FIG. 4, the drive link 60 is moved in the direction A by a drive portion (not shown). When the cam projection 52 is pulled in the direction A by the groove 61 of the drive link, the cam 50 rotates around its cam member fulcrum 53. As the cam 50 rotates, the punch 1a and the punch holding link 40a are lowered by the cam groove 51 through the pin 2a with the guide holes 12a and 22a as guides. On the other hand, the punch holding link 40a rotates around its fulcrum 41a when the tip is lowered, so the remaining punches 1b attached to the punch holding link 40a are also lowered with the guide holes 12b and 22b as guides. It is done.

The tips of the punches 1 a and 1 b pushed down by the cam 50 and the punch holding link 40 are inserted into the die holes 13 a and 13 b provided in the die frame 31 through the paper passing port 6. At this time, if a paper to be punched (not shown) is arranged at a predetermined position of the paper passage opening 6, predetermined holes are punched in the paper by inserting the punches 1a and 1b and the die holes 13a and 13b.
After punching the paper, the punches 1a and 1b are further lowered to reach the position shown in FIG.

After reaching FIG. 5, when the drive link 60 is moved in the direction opposite to that of A, the punch 1 is lifted upward by the reverse action of the above-described operation and raised to the standby position shown in FIG.
In this way, it is possible to drill two adjacent holes by operating two punches arranged on the punch holding link 40 simultaneously.

  In the embodiment of FIG. 4, the cam member center 53 is set at the center of the punch 1a with respect to the longitudinal direction of the punch holding link 40. However, as shown in the embodiment of FIG. Also good. However, there is a drawback in that the cam member has a larger radius of rotation, resulting in an increase in the height of the device. Therefore, as shown in FIG. 4, the cam member center 53 is preferably installed at the center of the punch 1 a with respect to the longitudinal direction of the punch holding link 40.

It is explanatory drawing explaining the punch standby state of this invention by a basic element. It is explanatory drawing explaining the piercing | punching state of the punch of this invention by a basic element. It is sectional drawing which shows an example of embodiment of this invention. In an example of an embodiment of the present invention, it is a sectional view showing a standby state. In an example of an embodiment of the present invention, it is a sectional view showing a perforated state. It is sectional drawing which shows a standby state in another example of embodiment of this invention.

Explanation of symbols

  1 punch, 2 pins, 6 paper feed opening, 10 guide frame, 12 lower frame guide hole, 13 die hole, 22 upper frame guide hole, 31 die frame, 40 punch holding link, 41 punch holding link fulcrum, 50 Cam, 51 Cam groove, 52 Cam projection, 53 Cam member fulcrum, 60 Drive link, 61 Drive link groove, 101 Lower frame, 102 Upper frame, 70 Rivet, 80 Support pin

Claims (2)

In a sheet material punching device that forms a hole row in a sheet material in cooperation with a punch that reciprocates and a die hole corresponding to the punch, the punch that is provided with two or more punches and that is pivotable about a fulcrum A holding link; a cam member connected to a force point side of the punch holding link via a cam surface; and a drive unit that drives the cam member to impart a rotational motion to the punch holding link. The punches are arranged side by side in the longitudinal direction of the punch holding link, and the drive unit is driven substantially in the longitudinal direction of the punch holding link to slide the cam member on the punch holding link. apparatus. 2. The sheet material punching device according to claim 1, wherein the cam member is provided so as to be rotatable about a cam member fulcrum.

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