JPH091468A - Pliers - Google Patents

Abstract

PURPOSE: To easily change a width of an opening in a clamping part to an optional dimension by arranging shaft supporting bores crank-shapedly. CONSTITUTION: Three or more shaft supporting bores 3 are arranged in an engaging groove 4 in a clamping body 1, and respective bores are crank-shapedly connected to each other by means of grooves each of which is provided with a width narrower than the diameter of the bore, so that in an edge part or edge parts 9 of one side or two sides in the engaging groove 4, circular arcs of the shaft supporting bores 3 continue wave-shapedly. In the engaging groove 4, diameters of the grooves connecting the shaft supporting bores 3 allow a supporting shaft 5 to freely move in the engaging groove 4 when a flat face part of the supporting shaft 5 is matched with the longitudinal direction of the engaging groove 4 and the clamping parts 6, 7 are opened. However, the supporting shaft 5 is temporarily stopped in a crank part 8, as the engaging groove 4 is formed crank-shapedly. Therefore, a dimension of an opening between the clamping parts 6, 7 can be adjusted while preventing the supporting shaft 5 from moving directly from the bore 3 in the end part of the engaging groove 4 to the bore 3 in the other end part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plier capable of arbitrarily adjusting the opening size of a pliers holding portion.

[0002]

2. Description of the Related Art As a plier capable of adjusting the opening size of a holding portion, there is a utility model number 35-18693,
As is known from Japanese Utility Model Publication No. 63-27976, there is known a plier in which an arc-shaped support bar is provided on the support part of one of the sandwiching bodies, and a projection part which engages with the arc-support bar is provided on the other. When such a type of pliers is clamped, the load is applied only by the engagement of the arc-shaped support bar and the protrusions. The projection that is engaged with the supporting ridge may slip off beyond the supporting ridge due to temporary deformation or the like, so that the supporting ridge may come off, resulting in damage to the worker.

Further, as a plier capable of adjusting the opening size of the sandwiching portion, as a pliers, Shoko 46-2551.
1, there is known a plier having an engaging groove provided with a number of fulcrum perforations such as Japanese Utility Model Publication No. Sho 58-48054. When trying to fix it at a new position after opening it at a certain position, a plurality of fulcrum perforations and engagement grooves that connect the perforations are arranged in a straight line. It took some adjustment and a little technique.

[0004] In addition, actual public Sho 63-9426, actual public Sho 3
As shown in FIG. 4 of No. 9-1391, one of the sandwiching bodies has a serrated locking tooth, and the other sandwiching body has a locking claw that meshes with the serrated locking tooth so that the sandwiching portion is in another stage. Adjustable pliers are known, but they have been inevitably expensive due to the large number of parts and the large number of production processes.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide at low cost a pliers which can easily fix the size of the opening of the holding portion at any predetermined position.

[0006]

In order to achieve the above-mentioned object, the present invention has, as shown in FIG. 1, a support shaft 5 having a semicircular cross section with a part of the peripheral surface being a flat surface and holding one support member. It is fixed to 2 and 3 or more support shaft holes 3 so that the position of the support shaft can be changed.
In the pliers that are engaged with the sandwiching body 1 provided with the engaging groove 4 having, and can arbitrarily adjust the opening size of the sandwiching portion,
The gist of the present invention is a plier characterized by arranging the support shaft perforations 3 in a crank shape.

[0007]

In the pliers according to the present invention, the opening size of the holding portions 6 and 7 is adjusted by opening the grip portion of the pliers at a corresponding angular position and moving the position of the support shaft 5 to another support hole. Let it be fixed. In this case, since the support shaft 5 has a semicircular cross section, the support shaft 5 is movable in the engagement groove 4 when the flat portion is aligned with the longitudinal direction of the engagement groove 4. Although the support shaft 5 is in a freely movable state, the support shaft holes 3 are continuous and the engaging groove 4 has a crank shape. Therefore, the support shaft 5 is temporarily stopped at the crank portion 8. Therefore, the support shaft 5 can be adjusted without moving to the support shaft drilling hole at the opposite end at a time.

When the support shaft is moved from the support shaft drilling hole at the end of the engaging groove 4 to the support shaft drilling hole in the middle of the crank portion 8, the crank force of the engaging groove 4 is temporarily adjusted without any force adjustment. Since it is restrained by the portion 8, it is easy to adjust the size of the holding portions 6, 7 to any size.

[0009]

EXAMPLES Hereinafter, typical examples of the present invention will be described with reference to specific embodiments, but these exemplifications are, of course, for the purpose of explanation, and the present invention is not limited thereto.

An embodiment will be described with reference to the drawings. In FIGS. 1, 2 and 3, the support shaft 5 fixed to one holding body 2 of the pliers is inserted into the engaging groove 4 of the other holding body 1 having the support hole 3 and locked. ing. Here, the method of fixing the support shaft 5 and the method of locking the holding bodies 1 and 2 are arbitrary. The support shaft 5 has a cylindrical peripheral surface having a part of a flat surface and a semicircular cross section, or a substantially cylindrical shape having two surfaces facing the peripheral surface as a flat surface. This diameter is a diameter that can be pivotally supported in the support shaft hole 3 of the holding body 1 when the holding portions 6 and 7 are in a clamped state. Engagement groove 4 of the holding body 1
Has three or more support shaft perforations 3, and the perforations are continuous in a crank shape with a groove having a width smaller than the diameter,
Edges 9 on one side or two sides of the engaging groove 4 have a wavy shape in which the arcs of the support hole 3 are continuous. The diameter 10 of the groove that is continuous between the support shaft holes of the engagement groove 4 is such that when the flat surface portion of the support shaft 5 is aligned with the longitudinal direction of the engagement groove 4, the holding portions 6 and 7 are in an open state, 5 is a width that allows the engaging groove 4 to move freely. However, since the engagement groove 4 has a crank shape, the support shaft 5 once stops at the crank portion 8 as shown in FIG. Therefore, the opening size of the holding portions 6 and 7 is adjusted without the support shaft 5 moving from the support hole 3 at the end of the engaging groove 4 to the support hole 3 at the opposite end at one time. You can do it.

If the crank shape of the engagement groove 4 is a shape that does not move from one end of the engagement groove to the end of the opposite engagement groove at the same time when the position of the support shaft 5 is moved, the same purpose is achieved. Therefore, it can be said that a plier having an engaging groove having a Z shape, a step shape, a dogleg shape, or the like is an example of a plier in which the engaging groove has a crank shape. Therefore, when the engaging groove has the above-mentioned shape, the object of the pliers, which is a problem to be solved by the present invention and which easily fixes the opening size of the holding portion at an arbitrary fixed position, is effectively achieved.

[0012]

As described in detail above, the effect of the present invention is that the structure of the pliers having the function of easily changing the opening of the holding portion to an arbitrary size is simplified. It is easier to use and cheaper than pliers.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a pliers according to the present invention.

FIG. 2 is a partially cutaway front view showing a state in which the support shaft is blocked by the crank portion of the engagement groove when adjusting the opening of the holding portion of the pliers according to the present invention.

FIG. 3 is an enlarged view of the engagement groove.

FIG. 4 is a front view of a conventional pliers.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamping body 2 Clamping body 3 Support shaft drilling 4 Engagement groove 5 Support shaft 6 Clamping part 7 Clamping part 8 Crank part 9 Engagement groove edge part 10 Groove diameter

Claims (1)

[Claims] 1. A support shaft having a semicircular cross section having a flat surface at one or two locations on the peripheral surface is fixed to one of two sandwiching bodies having a gripping portion formed on the grip hand portion, and the support is provided. The shaft is inserted into an engagement groove having three or more support shaft perforations provided in the other holding body, and the flat surface of the support shaft is aligned with the longitudinal direction of the engagement groove so that the engagement groove is opened in the holding portion. On the other hand, in the pliers in which the support shaft is movable, and the support hole is rotatably supported by the support hole at a desired position in the clamped state, the support holes are arranged in a crank shape. Pliers to do.