JP5013457B2 - Hose clip pliers - Google Patents

Description

  The present invention relates to a hose clip plier used for attaching / detaching a hose clip used at a site where a hose is connected to a pipe of an automobile or the like.

For example, a hose clip (hereinafter referred to as a “clip”) in which a belt-like plate as shown in FIG. 7) is used. A situation where the hose is tightened from the outer periphery by the clip 7 and the hose is detached from the pipe and water leakage from the hose attachment portion is prevented.
When attaching and detaching the hose, a commercially available plier 11 is generally used, and the gripper 7 is held between the both ends gripping portions 7a and 7a of the clip 7, and the diameter of the clip 7 is increased to increase the radial dimension. ing.

However, the clip 7 has a strong force of tightening inward in the radial direction because of its function. Therefore, a large force is required to expand the diameter in order to increase the radial dimension.
For this reason, when the gripping portions 7a and 7a at both ends of the clip are gripped by the sandwiching portion 12 of the pliers 11, if the grips 7a and 7a are not sandwiched at an appropriate position of the tip end of the pliers 11, the clips 7 may be elastically repelled.

Alternatively, when the clip is grasped by the pliers 11, as shown in FIG. 7, when the clip 7 is asymmetrically sandwiched (obtained obliquely) with respect to the central axis (not shown in FIG. 7) of the pliers 11. (Left side of FIG. 7), the gripping portions 7a and 7b of the clip 7 are deformed (center of FIG. 7, right side of FIG. 7).
If the clip 7 is used in a deformed state (right side in FIG. 7), the proper tightening force cannot be obtained, and the clip 7 may be detached from the hose or water leakage may occur from the hose connection portion using the clip 7. There is.

  On the other hand, the clip is provided by providing projecting pieces directed to the opposite clamping part on the other side on the left and right side surfaces of the clamping part on one side of the pliers, and providing a non-slip strip on the clamping surface of both clamping parts. There has been proposed a plier that prevents the clip from coming off to the side during clamping (see Patent Document 1).

However, the related art (Patent Document 1) is for preventing the clip from coming off from the plier clamping portion when the clip is loosened and the hose is pulled out, and prevents the deformation of the clip as described above. Not what you want.
JP-A-6-71570

  The present invention has been proposed in view of the above-mentioned problems, and when connecting or removing a piping hose, the hose capable of reliably sizing the clip without deforming the clip in the attaching / detaching operation of the hose clip. The purpose is to provide clip pliers.

  According to the present invention, in order to attach and detach the hose clip (7) in which the belt-like body is formed in a circular shape and crossed at both ends to form both-end holding portions (7a, 7a), both ends of the clip (7) are held. The tip of a pair of pliers main bodies (1A, 1B) that are pivotally engaged by pins (5) in a hose clip plier that increases the radial dimension of the clip (7) across the portions (7a, 7a) The first clamping portions (2A, 2B) are provided opposite to each other, and the first clamping portions (2A, 2B) are provided on the pin (5) side of the first clamping portions (2A, 2B). The second holding part (3A, 3B) having a wide gap is formed, and the first holding part (2A, 2B) is formed with a curved surface (2a) having a convex opposing surface, and the curved The surface (2a) is directed from the tip toward the pin (5), and the first curved surface (a) The flat surface (b) and the second curved surface (c) that sandwich the clip gripping part (7a) extend linearly and continue to the second clamping part (3A, 3B), and the second clamping part In (3A, 3B), teeth (3a) are formed on the opposing surface.

  According to the hose clip pliers of the present invention configured as described above, the clip gripping portion is clamped at a symmetrical position when the pliers of the present invention are used in the attachment / detachment work of the hose clip when connecting or removing the piping hose. Therefore, the clip is not deformed.

That is, the holding part (7a) of the hose clip is bent at a right angle from the outer peripheral part (7b) of the hose clip, and in a free state, both holding parts (7a, 7a) are opened outward from each other. It is in. And when the gripping part (7a) is clamped by the convex curved surface (2a) of the first clamping part (2), the clip gripping part (7a) slides toward the root of the curved surface (2a), and The tip of the first clamping part (2) has a shape that rotates easily with the clip outer peripheral part (7b) coming into contact therewith.
Therefore, even if the clip (7) is held obliquely at an asymmetric position, the gripping portions (7a, 7a) of the clip (7) slide on the curved surface (2a), and the first holding portion (2) It will come off. Alternatively, the grips (7a, 7a) of the clip (7) slide on the curved surface (2a), and the clip (7) moves so as to be in a symmetrical position with respect to the central axis of the pliers (10).

In addition, the hose clip pliers (10) of the present invention can be easily manufactured by additionally processing an established standard pliers.
Therefore, the pliers of the present invention can be obtained easily and at low cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a pinching portion S at the tip of a hose clip plier 10 according to a first embodiment of the present invention. The present invention is characterized by the sandwiching portion S, and the portion other than the sandwiching portion S has the same configuration as that of the commercially available pliers. Therefore, the clamping part S is demonstrated below.

In FIG. 1, a pair of pliers 1 </ b> A and 1 </ b> B are rotatably engaged by a pin 5.
The first sandwiching portions 2A and 2B (represented by reference numeral 2) are provided at the front ends of the pliers 1A and 1B so as to face each other, and the interval between the first sandwiching portions 2A and 2B is (next It is narrower (compared to the interval between the second clamping parts 3A, 3B to be described).
Second clamping parts 3A and 3B (represented by reference numeral 3) are formed in an area closer to the pin 5 than the first clamping part 2, and the interval between the second clamping parts 3A and 3B is It is wider than the interval between one clamping portion 2A, 2B.
In FIG. 1, the first clamping unit 2 and the second clamping unit 3 constitute a clamping unit S.

As shown in detail in FIG. 2, the first sandwiching portion 2 at the distal end is formed with a curved surface 2 a that is convex on the opposing surface.
The curved surface 2a has a small R (for example, about R3.5) from the upper side (the tip of the first clamping unit 2) to the lower side in FIG. 2, and slightly holds the clip holding unit 7a. A flat surface b and a second curved surface c having a slightly larger radius of curvature (for example, about R5).

  As will be described later, when the gripping portion 7a of the clip 7 is sandwiched between the curved surfaces 2a and 2a of the pliers (reference numeral 10 in FIG. 1), the end of the gripping portion 7a slides and moves. Is formed.

A surface d continuous from the second curved surface c in the first clamping unit 2 extends linearly and continues to the second clamping unit 3.
The second sandwiching portion 3 has a plurality of teeth formed on the opposing surface, and the interval between the opposing second sandwiching portions 3 is relatively wide. In addition, in 1st Embodiment of FIGS. 1-3, the 2nd clamping part 3 is the same shape as the commercially available pliers.
Here, the curvature radius in the various curved surfaces of the second curved surface c is set to 20 mm or less, for example.

In the first embodiment, when the grip portion 7a of the clip 7 is sandwiched between the first sandwiching portions 2A and 2B of the pliers, the clip 7 is temporarily attached to the pliers 10 as shown in FIGS. Even if it becomes asymmetric with respect to the center line (not shown) (when the clip 7 is gripped obliquely), as shown in FIG. Is locked by the uppermost tooth 3a.
Here, in the state shown in FIG. 3A, the end of the gripping portion 7a on the first sandwiching portion 2A side is located on the second curved surface c, and the gripping on the first sandwiching portion 2B side is performed. The end of the part 7a is at the position of the uppermost tooth 3a. By clamping with the pliers, the end of the gripping portion 7a on the first clamping portion 2A side slides on the second curved surface c until it is locked with the uppermost tooth 3a, and in FIG. It will be in the state shown.
On the other hand, in the state shown in FIG. 3 (2), the end of the gripping part 7a on the first clamping part 2B side is locked at the valley between the uppermost tooth 3a and the next-stage tooth. When sandwiched by the pliers, the end of the gripping part 7a on the first clamping part 2A side slides on the second curved surface c, and the end of the gripping part 7a on the first clamping part 2B side is the uppermost tooth. It moves upward in the figure so as to get over 3a, and the state shown in FIG.

  In the state shown in FIG. 3 (3), the clip 7 is clamped in a symmetrical state with respect to the center line (not shown) of the pliers 10. If sandwiched by the pliers 10 in this state, as shown in FIG. 3 (4), only the gripping portions 7a and 7a are gripped by the first gripping portions 2A and 2B, and the hose clip 7 is properly attached and detached. .

  When the gripping portions 7a and 7a of the clip are not locked by the uppermost teeth 3a in the second sandwiching portion 3 and are not pressed by the flat portion b or the curved surface c, the gripping portions 7a and 7a are not curved surfaces 2a. Accordingly, it moves to the outside of the pliers 10. Therefore, the gripping portions 7a and 7a are not pressed to the diameter-expanded side by the pliers 10, and the clip 7 is not deformed.

FIG. 4 shows a second embodiment.
In FIG. 4, the first clamping part 2 is configured in the same manner as in the first embodiment of FIGS. 1 to 3, but the second clamping parts 3C and 3D are different from the first embodiment. Yes.

In the first embodiment, the second sandwiching portion 3 has a plurality of teeth, whereas in the second embodiment of FIG. 4, the second sandwiching portions 3C and 3D have the uppermost teeth 3a. They are only provided in pairs.
Other configurations and operational effects of the second embodiment of FIG. 4 are the same as those of the first embodiment of FIGS.

In particular, the pliers 10 according to the first embodiment shown in FIGS. 1 to 3 can be manufactured by performing additional machining from the pliers 11 that conform to existing standards.
As shown in FIG. 5, if the tip end sandwiching portion S of the pliers conforming to the existing standard is additionally processed, the hatched portion Z of FIG. 5 is deleted, and a curved surface indicated by reference numeral 2a in FIG. The pliers 10 according to the first embodiment shown in FIGS. 1 to 3 can be manufactured.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

The partial perspective view which shows the front end clamping part of the plier for hose clips which concerns on 1st Embodiment of this invention. The figure which shows the detailed shape of the clamping part of FIG. The figure explaining the holding | grip state of the hose clip by 1st Embodiment. The figure which shows the detailed shape of the clamping part of the plier for hose clips which concerns on 2nd Embodiment. The figure which shows the additional process which manufactures the plier for hose clips of this invention from the existing plier. The perspective view which shows the shape of the conventional hose clip. The figure explaining the holding state of the hose clip by the conventional standard pliers.

Explanation of symbols

1A, 1B ... Pliers 2A, 2B, (2) ... 1st clamping part 3A, 3B, (3) ... 2nd clamping part 5 ... Pin 7 ... Clip 7a ..Clip gripping parts 10, 11 ... pliers S ... clamping parts

Claims (1)

In order to attach and detach the hose clip (7) in which the belt-like body is formed in a circular shape and crossed at both ends to form both end grips (7a, 7a), both end grips (7a, 7a) of the clip (7) In the hose clip pliers that increase the radial dimension of the clip (7) with the pin interposed therebetween, the first ends of the pair of pliers main bodies (1A, 1B) that are rotatably engaged by the pins (5) are respectively A second holding portion (2A, 2B) is provided opposite to each other, and the first holding portion (2A, 2B) has a wider gap on the pin (5) side than the first holding portion (2A, 2B). Are formed, and the first clamping portion (2A, 2B) is formed with a curved surface (2a) having a convex opposing surface, and the curved surface (2a) is a tip. Toward the pin (5) side from the first curved surface (a) and the clip handle The flat surface (b) sandwiching the portion (7a) and the second curved surface (c) extend linearly and continue to the second sandwiching portion (3A, 3B), and the second sandwiching portion (3A, 3B) is a pliers for hose clips in which teeth (3a) are formed on the opposing surface.

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