JPH02100883A - Blade means for stapler - Google Patents

Abstract

PURPOSE:To reinforce the thrusting part of a thrusting handle member, to improve slidability as well and to simplify the structure of a blade means supporting an operating blade by forming the operating blade only by a sheet of metal piece. CONSTITUTION:The operating blade 4 filing a document, etc., by pressing a staple is made by a sheet of steel plate for spring in 0.7mm thickness, the tip of which is in a curved T shape with 1-1.5mm radius in a circular shape. When this operating blade 4 is used by combining with a handle member 1, at the colliding part 6 with the handle member 1 6' is formed in a smooth circular shape, so the slidability between the both 4 and 1 can be improved remarkably and the document filing action of a staple can be executed extremely smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a blade for a stapler. More specifically, the present invention relates to a blade for a heavy-duty stapler that staples a large number of documents.

(Prior art 1. Problems to be solved by the invention) Conventionally,
a handle member rotatably mounted to a base member and/or a frame member rotatably mounted to the base member, the handle member having an actuating blade substantially centrally thereof; Several types of staplers are known.

In the known so-called heavy-duty stapler, the stable is used for the stiffness of the documents to be stapled.
The handle member is made of metal or, if plastic, of a material or structure that increases breaking strength.1 The actuating blade is supported by a blade means constructed of strong metal; The vertical movement based on the lever principle allows the stable to be moved vertically one by one by smoothly moving up and down at the specified location.
This stable passes through the thick document etc. without the needle tip being curved, and is curved by the engaging anvil,
It is designed to bind documents, etc.

In this way, in order to convert the vertical movement of the handle member based on the lever principle into accurate and smooth vertical movement at the specified location, it is necessary to have low friction at the point of contact between the handle member and the operating blade.1 Mechanical Requirements include that buckling is unlikely to occur, that the materials of both the handle member and the operating blade are unlikely to deform or break, and that the blade means has a support structure that allows smooth downward movement of the operating blade. .

For this reason, not only the conventional blade means but also the operating blade are required to have a sturdy structure, and in order to convert the circular arc vertical movement caused by the lever into smooth linear movement, extremely complex structures were selected and manufactured. , has been used.

Since the operating blade has a complicated structure, it is prone to failure due to frequent use, and the manufacturing and assembly work of the stapler is also complicated and expensive.

The inventor has made various considerations to solve this problem.

Although we have continued to study the problem and have already proposed inventions such as Japanese Patent Application No. 198703/1983, we have not yet reached a complete solution to the problem.

(Means for Solving the Problem) In heavy-duty staplers, just like in small, general-purpose or disposable staplers, the actuating blade is
If it could be constructed from only a single metal piece, the blade means could be simplified, the operation of the operating blade could be made more efficient, the occurrence of failures could be reduced, and manufacturing and assembly costs could be reduced.
Significant benefits are expected not only for stapler manufacturers but also for general users.

The inventor has focused on this point and has made comprehensive considerations.

As a result of further investigation, the following invention was completed.

That is, the actuating blade is made up of only one metal piece, the abutting portions of the abutting handle members are strengthened, sliding properties are improved, and the structure of the blade means for supporting the actuating blade is simplified. Prevents bending of the operating blade,
We conducted a study aimed at promoting smooth vertical movement.

For this reason, the metal plate is removed from the part of the handle member that abuts the operating blade, and the flat abutting part is made to maintain a constant [%] even when subjected to E downward movement by the lever, and the handle member of the actuating blade is One end that abuts the blade is made into an arc shape to make the sliding of the handle member smoother when the handle is pressed downward, thereby preventing the actuating blade itself from curving as much as possible. With the actuating blade as a single piece of metal, the structure of the engaging blade means is
This made it possible to simplify the design without sacrificing functionality.

There are five different ways to maintain the slidability and engagement of the abutting portion of the actuating blade and the handle member.1 For example, as shown in Example 1, the abutting portion of the actuating blade and the handle member is There is a method of utilizing the bent circular arc portion of the piece, a method of thickening and curving the portion of the handle member that abuts the operating blade as shown in Embodiment 2, and a method of making the part of the handle member that abuts the operating blade thicker and curved as shown in Embodiment 3. There is a way to eliminate sharp corners and undercuts that cause such stress concentration.

In order to understand the blade means according to the invention in detail, its aspects are illustrated in the examples given below. However, the present invention is not limited to the scope of these embodiments, but is based on the spirit of the invention.

It should be understood that there are various other embodiments.

(Example) Harm] 1-2; As shown in Fig. 2, the operating blade (4) that presses the stable to bind documents, etc., has a tip with a radius of 1 to 1.5 @
T-shaped, curved in an arc of m, thickness 0.7mm
Manufactured from a single piece of spring steel plate.

When this actuating blade (4) was used in combination with a conventional plastic handle member (1), the abutment part (6°) with the handle member (1) was in a smooth arc shape. The sliding properties between the two were significantly improved, and the document binding action of the stable was extremely smooth, and even after multiple uses, no sliding was observed as experienced with conventional similar products.

As shown in Fig. 3, the abutting portion (6) of the handle member (1) where the actuating blade (4) abuts is provided with a thick section whose cross section draws a smooth arc. When the handle member is pressed down to perform a document binding action, the stable pressing portion at the lower end of the operating blade descends at a constant speed as much as possible.

By making the inside thicker in this way, the point of action of the handle member (1) is strengthened, and by making it into a smooth arc shape, the abutting operating blades are pressed smoothly, making it easier for the stapler user to use the handle member (1). Documents can now be bound beautifully with less pressure without causing any pleasure.

XAl1; As shown in Fig. 4, an engaging part (7) that abuts the handle member (1) and the actuating blade (4) to define the limit of the actuating blade (4) is conventionally frequently used. It is not formed as an undercut part of the handle member (1) as previously described, but is formed as a protruding part, and furthermore, a sharp corner part is not formed.

As a result, even when the handle member (1) is lowered and the stable is pressed and curved to complete document binding,
Even if you repeat this process many times.

There was no fear of damage or deformation of the handle member.

Although the above inventions are sufficiently effective when implemented alone, they are even more effective when implemented in combination.
Get better luck with more reliable effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conventionally known heavy duty stapler. FIG. 2 is a plan view and a cross-sectional view taken along the line AA', showing the structure of the actuating blade according to the present invention. FIG. 3 is a partially enlarged sectional view showing the abutting portion between the handle member and the operating blade according to the present invention. FIG. 4 is another partially enlarged cross-sectional view showing the abutment between the handle member and the actuating blade according to the present invention. In the accompanying drawings. ■...Handle member, 2...Base member,
3... Frame member, 4... Operating blade. 5...Blade means, e, e''...Abutting portion, 7...Engaging portion. Fig. 1 Fig. 2

Claims (4)

[Claims] (1) In a stapler comprising a base member, a frame member rotatably attached to the base member, and a handle member rotatably attached to the frame member or the base member. ,
Blade means for a stapler, characterized in that the blade means for stabilization engaging the handle member includes a T-shaped actuating blade comprised of a single piece of metal having an arcuate turn at its upper end. . (2) The blade means according to claim 1, wherein the abutting portion of the handle member where the blade means abuts against the operating blade is configured to form a thick circular arc with a smooth cross section. A blade means for a stapler, characterized in that: (3) The blade means for a stapler according to claim 1, wherein the cross section of the abutting portion of the handle member is linear. (4) The blade means for a stapler according to claim 1, wherein the abutting portion of the handle member has a protruding engaging portion.