JPH08155898A - Punch - Google Patents

Abstract

PURPOSE: To equalize resistance generated at punching time or the like of paper sheets, and punch a hole with small force by arranging two rod edges on two levers pivotally fixed to a pedestal, and applying a prescribed difference to the punching timing of both rod edges. CONSTITUTION: Two rod edges 11 and 21 are penetrated through respective holes 18 and 28 respectively bored in a pedestal 1, and two holes are punched in a paper sheet 2 placed on the pedestal 1. In such a punch, two levers 10 and 20 are pivotally fixed to the pedestal 1 so as to be respectively freely rotatable, and two rod edges 11 and 21 are respectively arranged on these. A prescribed difference is applied to the punching timing of both rod edges 11 and 21. That is, according to rotation of one lever 10, a slidingly movable pin 26 is slidingly moved along this slidingly movable part 17, and the other lever 20 is rotated upward. Therefore, drag generated at punching time is equalized, and a hole can be punched with small force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch, and more particularly to a two-hole punch having two rod blades.

[0002]

2. Description of the Related Art In a conventional punch, especially a punch for two holes, a lever is pivotally attached to a base, and a rod blade whose upper end is pivotally attached to the lever is provided on the base by pivoting the lever. The paper was placed on the pedestal by punching through the hole. At this time, the timing of punching the paper sheet by the two rod blades was two at the same time. Further, in order to pull out the rod blade from the paper sheet after perforating the paper sheet and return the rod blade and the lever to the original position, the rod blade or the lever is provided with a spring at each rod blade portion. Furthermore, in order to find the center of the paper sheet when punching, it is common to find the center of the punching by bending a part of the paper sheet.

[0003]

The conventional punch has the following problems because it has a structure in which the two rod blades simultaneously punch the sheet by the rotation of the lever as described above.

(1) As the lever is rotated, the repulsive force of the spring for returning the original position of the lever or the like increases in proportion thereto. The repulsive force of the spring becomes maximum at the completion of drilling.

(2) The rod blade descends due to the rotation of the lever, and the blade edge bites into the paper sheet as it descends. However, since the rod blade edge shape is an inverted V-shape, the punching force acting on the rod blade also goes into the blade edge. It becomes large and becomes the maximum just before the completion of drilling. That is, the repulsive force of the lever return spring,
Since the maximum value of the punching force of the rod blade is generated almost at the same time when the sheet punching is completed, there is a problem that an excessive force is required to rotate the lever.

(3) In punching, the center position of punching the paper sheet must be obtained, and the center position must be aligned with the center mark of the punch to punch the hole.

In view of this, it is an object of the present invention to provide a punch capable of punching with a small force by staggering the surface drag force generated at the time of punching by shifting the timing of punching the leaf blade by rotating the lever. And Further, it is an object of the present invention to provide a punch capable of punching without having to determine the punching center of the sheet when punching.

[0008]

The present invention relates to a punch having two rod blades, the rod being penetrated through a hole provided in a pedestal so as to perforate a paper sheet placed on the pedestal, with respect to the pedestal. Two levers are rotatably pivotally attached, and a first rod blade pivotally attached to the first lever and a second lever whose end is slidably connected to the first lever. A punch having a second rod blade to be pressed and having a structure in which the second rod blade starts drilling in the middle of the drilling of the first rod blade and the drilling timing of each rod blade is shifted. Is.

In the punch, the end position of the sheet from the punching position is displayed on the upper surface of the pedestal to facilitate the positioning of the punching of several kinds of sheets, and the end position of the pedestal is displayed. Is a punch in which the end position of one sheet to be punched is matched.

[0010]

[Operation] Since the upper end portion of the first rod blade is pivotally attached to the first lever, the rotation of the first lever lowers the first rod blade, and By penetrating through the hole, the paper placed on the
Perforate the hole. The end portion of the second lever slides on the sliding portion provided at the middle portion of the first lever, thereby
It rotates in conjunction with the rotation of the lever.

In the middle of the rotation of the second lever,
The second rod blade is pressed by the pressing portion of the second lever, the second rod blade descends as the second lever rotates, penetrates into the other hole on the upper surface of the pedestal, and A second hole is punched in the placed paper sheet.

Next, focusing on the drag force in the above-mentioned behavior, the first lever is about twice as long as the conventional lever due to the structural characteristics of the punch of the present invention, and therefore the first rod is used. Drilling with a blade can be easily performed with about half of the force acting on one conventional rod blade.

Further, the second lever itself does not have an original position return spring, and the repulsive force of the original position return spring acts on the second lever until the second rod blade is pressed. do not do. The second rod blade has a spring for returning to the original position, and the repulsive force of the spring for returning to the original position of the second rod blade from the time when the second lever starts pressing the second rod blade. , And the drag force due to the perforation force due to perforation of paper sheets increases. However, since the drilling by the second rod blade is started in the middle of the drilling of the first rod blade, the drag generated by the dragging also shifts, and the maximum drag generation by the first rod blade occurs. Later, the maximum drag of the second rod blade occurs. As a result, the total drag force acting on the first lever according to the invention is much smaller than when using conventional punches.

The return of the lever or the like to the original position is performed by the repulsive force of the return spring of the first lever or the first rod blade. The spring for the second rod blade acts to pull out the rod blade from the paper sheet, and the return of the second lever returns mainly by interlocking with the behavior of the first lever via the sliding portion with the first lever. .

Further, since the end positions (for example, A4 length, B5 length, A4 width, B5 width, etc.) of various sheet sizes are displayed on the upper surface of the pedestal, the sheet is folded in half when punched. Therefore, it is not necessary to obtain the center position of the perforation, and it is possible to easily perforate the center of the paper simply by aligning the edge of the paper with the display position.

Further, the position of the end portion of the pedestal makes a hole 1
Since it is aligned with the end position of the paper sheet (for example, A4 lengthwise), the punching work is further facilitated by using a punch having an end portion corresponding to the main paper size to be handled.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in FIGS. The same number is assigned to the same member for each part name. FIG.
2 is a perspective view of the present invention, FIGS. 2 to 4 are side views showing the behavior of the punch according to the present invention, and FIG. 5 is a sectional view taken along line AA in FIG.

In FIG. 1, 1 is a pedestal having holes 18 and 28 for drilling, 11 is a first rod blade located directly above the hole 18 for drilling, and 13 is a holder for storing the first rod blade 11. The housing 10 is a first lever pivotally attached to the housing 13 by a lever pin 12.

A rod pin 14 is attached to the first rod blade 11.
Is passed through, and both ends of the rod pin are held by rod pin holding portions 16 (see FIG. 2) provided on the side portions of the first lever 10, and the first lever 10 rotates about the lever pin 12 as an axis. At this time, the first rod blade 11 is slid downward to penetrate the hole 18 for drilling. For this reason, the housing 13 is provided with an opening 15 (see FIG. 2) on the side portion thereof, which allows the rod pin 14 to move up and down.

As shown in FIG. 5, the housing 13
Is fixed to the pedestal 1 via the base 13a. 1
Reference numeral 9 is a spring for returning the original position of the first lever 10 and the first rod blade 11, and in addition to a linear spring having a twisted middle portion as shown in FIG. 1, a spiral spring or a leaf spring is used. May be.

Since the first lever 10 and the first rod blade 11 are configured so as to interlock with each other by the rod pin 14 and the rod pin holding portion 16, the spring 19 causes the first lever 10 or the first rod blade 11 to operate. It may be attached to any of.

The first lever 10 has a similar structure to the above.
It is also provided below the middle part. Reference numeral 21 denotes a second rod blade located immediately above a hole 28 for boring provided on the base 1.
3 is a housing for holding and storing the second rod blade 21, 2
Reference numeral 0 is a second lever pivotally attached to the housing 23 by a lever pin 22.

A rod pin 24 is attached to the second rod blade 21.
Are penetrated, and both ends thereof are projected to the outside through an opening 25 (see FIG. 2) provided in a side portion of the housing 23. A sliding pin 26 is provided at an end of the second lever 20 opposite to the side having the lever pin 22.
A sliding portion 17 provided in the middle portion of the lever 10 slides. That is, with the rotation of the first lever 10, the second lever 20 is structured to rotate downward as the sliding pin 26 slides on the sliding portion 17.

2 to 4 show the rotating state, and the lever rotates in the order of FIG. 2 → FIG. 3 → FIG. At this time, the rod blades are housed in the housings 13 and 23 together with the first rod blade 11 and the second rod blade 21 in FIG. 2, but in the state of FIG. On the other hand, the second rod blade 21 starts descending from this point. Further, in FIG. 4, both the first rod blade 11 and the second rod blade 21 are in a state in which drilling has been completed.

Numeral 29 is a spring for returning the second rod blade 21 to the original position, which acts to push the rod pin 24 upward. As the spring, in addition to a linear spring having a twisted middle portion as shown in FIG. 1, a spiral spring or a leaf spring may be used. Unlike the spring 19 used in the first rod blade 11, the spring 29 is not attached to the second lever 20,
It is characterized in that it is for returning the second rod blade 21.

Further, as shown in FIG. 3, the rod pin 2
When the second lever 20 rotates about the lever pin 22 and tilts at a predetermined angle, the protrusions on both ends of the second lever 2
The pressing portion 27 of 0 pushes the second rod blade 21 downward to lower the rod blade.

The housing base 13a and the pedestal 1 shown in FIG.
The configuration of the fixing portion with is the same in the case of the housing 23.

Further, by adjusting the lengths of one end of the pedestal 1 and the center position of the perforation, the paper sheet is simply aligned with the end portion and the perforation center of the paper sheet is not calculated. Can pierce the center of the leaf. For example, when making A4 size vertical and perforating to the left, the length is adjusted so that the lower end of the paper sheet is one end of the base 1. When the end portion is shorter than this due to the size of the paper sheet, it is possible to punch the center of the paper sheet in the same manner as described above by appropriately providing the positioning mark 3 as a mark of the end portion of the paper sheet on the upper surface of the pedestal 1.

Further, it is desirable to provide a known stopper or the like that can hold the first lever 10 in the state of FIG. 4 so as to be convenient when it is stored in a drawer or the like.

[0030]

As described above, the punch according to the present invention is composed of two sets of rod blades and two sets of levers. The operation of one lever pushes the other lever, and at this time, the two blades of the rod blades are pushed. Since the structure is such that the timing for punching is shifted, it is possible to easily punch with a small force. At this time, as for the repulsive force of the lever and the spring for returning the rod blade to the original position, only the spring of the rod blade portion 1 first acts, and the spring for the other rod blade acts in the middle of drilling,
It can be small.

Further, it is not necessary to obtain the perforation center point in advance on the paper sheet, and it is possible to perforate the paper sheet at a predetermined position simply by aligning the end portion of the paper sheet with the end mark of the pedestal or the end mark of the pedestal upper surface. , It takes a lot of trouble.

Further, since the whole shape is a slender vertical design, it can be easily stored in one corner on the desk, and it does not take up much space.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a side view showing the start of perforation according to the present invention.

FIG. 3 is a side view showing an intermediate stage of perforation according to the present invention.

FIG. 4 is a side view showing a step of completing perforation according to the present invention.

5 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 1 pedestal 2 paper sheet 3 positioning mark 10 first lever 11 first rod blade 17 sliding groove 18 hole for drilling 20 second lever 21 second rod blade 26 sliding pin 27 pressing portion 28 hole for drilling

Claims (3)

[Claims] 1. A punch having two rod blades, wherein the rod is penetrated through a hole provided in a pedestal so as to pierce a sheet placed on the pedestal, and the rod is rotatable with respect to the pedestal. Two levers pivotally attached to the first lever, and a first rod blade pivotally attached to the first lever, and an end portion of the rod blade pressed by a second lever slidably connected to the first lever. A punch, comprising: a second rod blade, wherein a difference is provided in the punching timing of the first rod blade and the second rod blade. 2. The punch according to claim 1, wherein the end position of the paper sheet from the punching position is displayed on the upper surface of the pedestal, and the display makes it easy to position the punching of several kinds of paper sheets. . 3. The end position of the pedestal is the end position of one sheet to be perforated.
Punch described in.