JPH106290A - Sheet material punching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To selectively punch the two types of hole numbers by installing a converting means, converting the rotation of a driving shaft by a motor into the reciprocation of a punch, and a selector means selecting the two types of punched holes, in a punching device which pouches a hole in a sheet material by way of reciprocating a punch in the vertical direction. SOLUTION: Supposing a driving motor 9 is rotated clockwise, two eccentric cams 1a and 1b with a c.w. rotating one-way cloth are rotated, and a punch 11 installed just underneath gets operating, whereby punching is carried out. Subsequently, these cams are reset to a standby position by energizing force of a return spring 12, and thus they are stopped by dint of a limit switch 6. At the time, three eccentric cams 2a to 2c with a c.c.w. one-way clutch are slipped by the one-way clutch, so that two-hole punching are carried out. Next, when another driving motor 7 is rotated in reverse, the eccentric cams 2a to 2c with the c.c.w. one-way clutch are operated, and the eccentric camS 1a and 1b with the c.w. one-way clutch are slipped and stopped, whereby three-hole punching are carried out instead.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforation apparatus for perforating holes for filing or positioning in a sheet material such as paper on which characters or drawings are printed or copied, and more particularly to two types of perforations. The present invention relates to a sheet material punching device capable of selecting the following.

[0002]

2. Description of the Related Art A conventional punching machine (commonly referred to as a manual punch) is used to file a sheet or the like after a printing process.
It has been known to manually bind and punch binding holes. Recently, however, there has been a wide variety of paper filing methods, and not only two punch holes, but many punch holes are required. It has become. Therefore, Japanese Patent Application Laid-Open No.
No. 73199 discloses a “punch for punching” in which two or three or more holes can be selected by a manual punch. However, these punches have troubles such as manually aligning the edges of the paper and confirming the punching position. For this reason, in recent years, there has been a demand that a punching device is built in a copying machine or the like so that punching is performed almost simultaneously with copying.

[0003] As an example of achieving this object, Japanese Utility Model Laid-Open No.
Japanese Patent Application Laid-Open No. 2-92196 discloses a "copying machine with a punching mechanism" equipped with a punching hole forming mechanism for forming a punching hole in copied paper that is not moving.
No. 862 also discloses a "copier with punch". In these devices, generally, an eccentric cam arranged above a punch is rotated by a drive motor about a rotation axis, and a punch below the eccentric cam is pushed out in a direction of a die hole to form a paper. A punch hole is formed.

[0004]

In Japan, a method of filing with two holes is frequently used, and although the number is very small,
A file method with multiple holes of three or more holes is also used.
However, in certain regions (for example, the United States), the method of filing with three holes is used even in the normal case, and in rare cases, the method of filing with four holes is used.
Files with holes or more are also used. Since these punching devices are generally dedicated according to the number of binding holes to be filed, even if a device for punching a normal file hole is mounted, a punching device for 2-hole punching and a 3-hole punching device are provided. It is necessary to prepare a drilling device for each. Therefore, Japanese Utility Model Application Laid-Open No. Sho 62-92196 and Japanese Unexamined Patent Application Publication No.
The copying machine disclosed in JP-A-121862 is provided with a punch or punch for only two holes, for use only in Japan.

[0005] In order to use such a copying machine in Japan and in a specific area, a punching apparatus for two holes and a punching apparatus for three holes are prepared, and each of them is adapted to the area where it is used. A perforator must be selected and mounted. For this reason, when assembling the copying machine, it is necessary to arrange a plurality of types of punching devices, and there is a problem that the selection of the punching device becomes complicated and the cost increases. Also, from the needs of the user, if a specific copier is purchased, only one type of perforation can be selected. For this reason, there has been a demand from the industry for a punching device that can freely select between, for example, two-hole drilling and three-hole drilling. In the punch for punching disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 62-173199, two or three or more holes are manually punched, so that the punch is mounted on office equipment for a copying machine. Cannot be punched almost simultaneously with copying. SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet material punching apparatus which solves the above-mentioned disadvantages and which can be mounted on a copying machine or the like to select two types of holes and to perform punching if necessary.

[0006]

According to the present invention, in order to solve the above-mentioned problems, as a result of various studies, an eccentric cam for reciprocating a punch is mounted on an eccentric cam with a one-way clutch, and this cam is mounted. If the shaft is rotated in both forward and reverse directions, the punch operated by the eccentric cam with the one-way clutch operates or remains stopped according to the rotation direction of the shaft, and it is found that two types of perforations can be made. The present invention has been completed.

More specifically, the present invention relates to a sheet material punching apparatus for punching a sheet material by reciprocating a punch in a direction perpendicular to the plane of the sheet material, a drive shaft to which rotation of a motor is transmitted, and a rotation of the drive shaft. And a switching means for selecting one of two types of perforations. And
The conversion means is a cam driven by rotation of a drive shaft, and the cam is an eccentric cam and / or an eccentric cam with a one-way clutch. Further, the switching means includes a drive shaft rotatable in both forward and reverse directions, and an eccentric cam and / or an eccentric cam with a one-way clutch mounted on the drive shaft, and the eccentric cam and the eccentric cam according to the rotation direction of the drive shaft. And / or an eccentric cam with a one-way clutch is operated to reciprocate a desired punch.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides an eccentric cam or any one of eccentric cams set in advance so as to operate only in one rotation direction by selecting one of forward and reverse rotation directions of a drive shaft. By rotating both or one of the eccentric cams that also operate in the rotating direction, the punch hole pitch, punch hole diameter, and number of punch holes can be selected in two patterns, and drilling corresponding to two types of file patterns can be performed. There are features. An eccentric cam with a one-way clutch that works in one rotation direction (forward rotation) is attached to the drive shaft that rotates in the forward and reverse directions, and the punch below it is operated for forward rotation. In the case of forward rotation, it is not desired to operate. That is, it should be operated in the other rotation direction (reverse rotation). An eccentric cam with a one-way clutch is mounted on the drive shaft in the reverse direction above the punch, and it is used for reverse rotation. I do.
Then, at the time of reverse rotation, the eccentric cam for normal rotation does not rotate.

By mounting the eccentric cam with the one-way clutch in this way, when the drive shaft is rotated forward or backward, only a predetermined punch can be operated. The punch to be operated by either forward rotation or reverse rotation of the drive shaft is operated by a normal eccentric cam not mounted on the one-way clutch.

An embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a cross-sectional view showing an example of the structure of the sheet material punching device of the present invention, and FIG. 2 is a conceptual diagram of an embodiment of the sheet material punching device of the present invention at the time of assembly. 1 and 2, eccentric cams 1a, 1b with a one-way clutch for forward rotation and eccentric cams 2a, 2b, 2c with a one-way clutch for reverse rotation are mounted on a drive shaft 3 at predetermined intervals. Positioning is performed by a ring 4.

A side plate is fixed to the base 14, and a bearing 10 is provided on the side plate. The drive shaft 3 on which the above-described eccentric cams 1 and 2 with one-way clutch are mounted is mounted on the bearing 10.
Is rotatably inserted through. Further, the base 14 is provided with a punch 11 which is inserted into the punch guide 13 and has a return spring 12 at a position opposite to the position of the above-described eccentric cam with one-way clutch. A die 16 is fixed below the base 14 via a spacer 15.
The gap formed between the base 14 and the die 16 by the spacer 15 becomes a passage for the sheet material.

The die 16 is provided with a concentric hole at a position facing the punch 11. At the end of the drive shaft 3, a shaft coupling 5 for transmitting the driving force of the drive motor 9 mounted on the motor mounting plate 7 to the drive shaft 3 is provided. Further, between the shaft coupling 5 and the motor mounting plate 7, a limit switch 6 and a positioning cam 8 are mounted.
The standby position of the drive shaft 3, that is, the standby position of the punch 11 is controlled. Next, the structure of the eccentric cam 1 or 2 with a one-way clutch will be described with reference to FIGS. FIG. 3 is a cross-sectional view showing an example of a commercially available magnet type one-way clutch 17 used in the embodiment of the present invention, which is formed by an outer ring 17a, a needle 17b, and a magnet 17c.

When the shaft 17e is inserted into the one-way clutch 17 and rotated, and when the shaft 17e is rotated to the left in the drawing, the needle 17b is attracted to the cam surface of the outer ring 17a by the attraction force of the magnet 17c (with the shaft 17e). Outer ring 1
7a), a wedge action occurs, and the shaft 17e and the outer ring 17a are locked,
The rotation of the shaft 17e rotates the outer ring 17a. Conversely, when the shaft 17e rotates rightward in the drawing, the needle 17b
Moves toward the larger gap between the shaft 17e and the outer ring 17a against the attraction force of the magnet 17c, so that a gap is formed between the needle 17b and the shaft 17e, and the outer ring 17a is rotated even when the shaft 17e rotates. An idling state in which it does not rotate is obtained.

Then, as shown in FIG. 4, when the eccentric cam 17d is fitted and mounted on the outside of the outer ring 17a of the one-way clutch 17, the eccentric cam 1 with the one-way clutch 1
Can be formed. Further, when the eccentric cam with one-way clutch 1 thus obtained is used for forward rotation and reverse rotation, it may be mounted on the drive shaft 3 in opposite directions. In the sheet punching device assembled in this manner, when the drive motor 9 is instructed to rotate forward and the drive shaft 3 is rotated in the forward rotation direction, the eccentric cams 1a and 1b with the one-way clutch for forward rotation rotate. After the punch 11 mounted immediately below is operated to perform perforation, the return spring 12
And returns to the standby position by the urging force, and stops by the operation of the limit switch 6. At this time, the eccentric cams 2a, 2b, 2c with the one-way clutch for reverse rotation are idled by the one-way clutch 17, and the punch is stopped at the standby position, so that two holes are punched.

Next, when a reverse rotation is commanded to the drive motor 7, the eccentric cam 2 with the one-way clutch for reverse rotation is turned
Since a, 2b and 2c operate and the eccentric cams 1a and 1b with the one-way clutch for normal rotation run idle and stop, three holes are drilled. In order to cause the drive shaft 3 to rotate forward or backward to perform either two-hole or three-hole drilling, the drive motor 9 is rotated in either one of forward rotation and reverse rotation. If the wiring of the motor is made as described above, one drilling device can be used for both two-hole drilling and three-hole drilling. Therefore, there is no need to select between two-hole drilling and three-hole drilling, and the cost is reduced. It will be very advantageous.

Further, when it is desired to selectively use the two holes and the three holes each time the hole is drilled, the drive motor may be provided with commands for forward rotation and reverse rotation as necessary.
In the present embodiment, the drive motor 9 and the drive shaft 3 are directly connected by the shaft coupling 5. However, in this position, forward rotation and reverse rotation may be mechanically selected and used. Also, the diameter of the punch is appropriately determined according to the situation of the perforation. Furthermore, depending on the position of the hole, if it is necessary to make a hole regardless of whether the drive shaft rotates forward or backward, if a normal eccentric cam is attached without using a one-way clutch, the position of that position is determined. The punch can operate at all times regardless of whether the punch rotates forward or backward. In this embodiment, a one-way clutch having a structure generally called a magnet type is used as the one-way clutch. However, a one-way clutch called a spring type is also known, and this can also be used.

[0017]

As described above, the sheet material punching device of the present invention selects two types of punch hole punching patterns simply by selecting one of forward and reverse rotation directions of the drive shaft. Therefore, it is possible to cope with the perforation of two types of binding holes by one unit, so that the perforation device can be downsized and the structure can be simplified, and the perforation device must be selected according to the perforation pattern. It is also possible to exclude. Therefore, it is an industrially very effective invention.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a sheet material punching device of the present invention.

FIG. 2 is an assembly conceptual diagram of FIG. 1 showing one embodiment of a sheet material punching device of the present invention.

FIG. 3 is a cross-sectional view showing an example of a one-way clutch used in the sheet material punching device of the present invention.

FIG. 4 is a cross-sectional view showing an example of an eccentric cam with a one-way clutch according to the sheet punching device of the present invention.

[Explanation of symbols]

1a, 1b Eccentric cam with one-way clutch for positive rotation,
2a, 2b, 2c Eccentric cam with one-way clutch for reverse rotation, 3 drive shaft, 4E stop ring, 5 shaft coupling, 6 limit switch, 7 motor mounting plate, 8
Positioning cam, 9 drive motor, 10 bearings, 11
Punch, 12 Return spring, 13 Punch guide, 14
Base, 15 spacer, 16 die, 17 one-way clutch, 17a outer ring, 17b needle, 17
c magnet, 17d eccentric cam, 17e shaft

Claims (4)

[Claims] 1. A sheet material punching apparatus for punching a punch by reciprocating a punch in a direction perpendicular to a plane of a sheet material.
A sheet material punching device comprising: a drive shaft to which rotation of a motor is transmitted; a conversion unit for converting the rotation of the drive shaft into a reciprocating motion of the punch; and a switching unit for selecting two types of punching. 2. The sheet material punching apparatus according to claim 1, wherein said conversion means is a cam driven by rotation of a drive shaft. 3. The sheet punching device according to claim 1, wherein the cam is an eccentric cam and / or an eccentric cam with a one-way clutch. 4. A switching means for switching between two types of holes includes a drive shaft rotatable in both forward and reverse directions and an eccentric cam mounted on the drive shaft and / or an eccentric cam with a one-way clutch. The eccentric cam and / or the eccentric cam with one-way clutch operate according to the rotation direction to reciprocate a desired punch.
4. The sheet material punching apparatus according to any one of items 1 to 3.