JPH0321918Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to an automatic paper punching device, and more specifically, the power of a solenoid is transmitted to a hammer using a lever, and the punch blade is moved by the impulse force of the hammer. The present invention relates to an automatic paper punching device operated using a paper punching device.

(b) Conventional technology As a device that automatically punches holes for files, loose leaf, etc. in paper, the force of a solenoid is transmitted to a hammer using a lever, and the punch blade is struck by the hammer to punch the desired paper. Automatic paper punching devices for punching paper are known.

(c) Problems to be solved by the invention However, the above-mentioned automatic paper punching device requires increasing the force of the solenoid itself when punching thick paper or multiple sheets of paper at once, resulting in high price and high cost. There are many problems with space etc.

(d) Means for solving the problem and its effect This invention consists of a punch blade, and two parts that support the punch blade so as to be able to guide it, and that are arranged facing each other with an interval that allows insertion of the paper to be perforated. A pair of guide plates, a hollow hammer facing the punch blade and supported so as to be coaxially movable, a solenoid disposed close to the hammer, and a rod-shaped rod with both ends connected to the drive shaft of the solenoid and the hammer. A lever is rotatably coupled to the side body and rotatably supported at approximately the center thereof, and further a small hammer is installed inside the ceiling wall of the hammer so as to be elastically movable coaxially via a spring member. This is an automatic paper punching device.

In other words, this invention uses a hollow hammer as the hammer, and by installing another small hammer inside via a spring member, in addition to the impact of the normal hammer on the punch blade, the inertial force The purpose is to make it possible to apply another blow to the punch blade with a small hammer, thereby applying a larger impact force to the punch blade.

The small hammer used in this invention is preferably a metal cylindrical body (solid body) as in the embodiment, and this small hammer is mounted coaxially within the (large) hammer by a spring member such as a spring coil. .

The automatic paper punching device according to this invention can be used as a single unit, but it can also be used in copying machines, various printers, etc.
It may be incorporated into a facsimile machine or the like so that it can be operated during a series of processes such as copying and printing.

(e) Examples This invention will be described in detail based on examples shown in the figures below. Note that this invention is not limited to this.

In FIGS. 1 and 2, an automatic paper punching device or automatic punching device (hereinafter referred to as automatic punching device) 1 is
It mainly consists of a punch blade 2, upper and lower guide plates 3 and 4, a (large) hammer 5, a solenoid 6, a lever 7, and especially a small hammer 8 and a spring coil 9 shown in FIG.

The punch blade 2 consists of a striking force holder 10 and a blade part 11 that integrally extends downward from the holder,
It is supported via a spring coil 12 on a punch blade guide seat 13 of the upper guide plate 3 so as to be elastically movable up and down. The lower guide plate 4 is arranged opposite to the upper guide plate 3 at a predetermined interval so that the paper to be punched can be inserted therein, and 14 is a hole for passing the punch blade which faces the seat 13 for guiding the punch blade.

The solenoid 6 has its drive shaft 15 rotatably connected to one end of the lever 7, and the hammer 5 has both body parts rotatably connected to the other end of the lever 7. In addition, 16 and 17 are the connecting shafts, 18 is the cylindrical part of the hammer, 19 is also the upper cover part, and 20 is the fulcrum of the lever.

The small hammer 8 is made of a cylindrical body, and is attached to the upper lid part 19 inside the hammer 5 via a spring coil 9 so as to be elastically movable up and down coaxially.

Thus, when the drive shaft 15 of the solenoid 6 operates in the direction of arrow A, the lever 7 causes the hammer 5 to strike the punch blade 2 in the direction of arrow B, thereby causing the punch blade 2 to move between the upper and lower guide plates 3 and 4. A perforated paper (not shown) to be inserted is perforated. By the way, after the hammer 5 hits the punch blade 2, the small hammer 8 repels the energy stored by the compression of the spring coil 9 due to inertia force in the direction of arrow C, and hits the punch blade 2.

In this manner, the punch blade 2 is subjected to a larger impact force by the respective hits by the large and small hammers 5 and 8, making it possible to punch a larger number of sheets of paper or thicker paper. Conversely, a smaller solenoid can be used to obtain a predetermined punching force, reducing costs.

Unlike the above embodiments, the large hammer can also be formed into a hollow shape with no opening. Of course, in this case it is preferable that the impact of the small hammer is obtained when the hammer is in contact with the punch blade.

(f) Effects of the invention According to this invention, in addition to the impact of the (large) hammer on the punch blade, the punch blade can be hit by a small hammer, making it possible to punch more paper at once or thicker paper.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view of a main part showing an embodiment of this invention, and FIG. 2 is an explanatory diagram of its overall configuration. 1...Automatic paper punching device, 2...Punch blade, 3...
...Upper guide plate, 4...Lower guide plate, 5...(Large)
Hammer, 6... Solenoid, 7... Lever, 8
...Small hammer, 9...Spring coil.

Claims (1)

[Claims for Utility Model Registration] A punch blade, a pair of guide plates that support the punch blade so as to be able to guide it and are arranged opposite to each other with an interval that allows insertion of the perforated paper, and a pair of guide plates facing the punch blade. a hollow hammer supported so as to be coaxially movable; a solenoid disposed close to the hammer;
A rod-shaped lever whose both ends are rotatably connected to the drive shaft of the solenoid and the side body of the hammer, and whose substantially central portion is rotatably supported, and further includes a spring member mounted on the ceiling wall inside the hammer. An automatic paper perforation device that has a small hammer inside that can be elastically moved coaxially through the hole.