JP2002144247A - Pipe clipper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe clipper constituted capable of strongly holding and fixing a resin pipe while effectively preventing unrestorable deformation and marring of the resin pipe. SOLUTION: The pipe clipper 11 has an inside surface cut out in a circular arc shape to make closely contact with the resin pipe and is furnished with a pair of left and right first clamp part 14 and second clamp part 15 axially installed free to revolve in the lateral direction and to face against each other and a first operating part 12 and a second operating part 13 to operate revolution of these clamp parts 14, 15. Three pairs of cutout parts 41 cut out and formed in an elliptical arc shape and facing against each other are provided on inside parts of the both clamp parts 14, 15. Additionally, antislipping treatment by zinc phosphate formation treatment is applied on inside surfaces of these cutout pars 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, for example, connecting a resin pipe constituting a water supply pipe extending under the floor to a water supply facility installed on the floor by connecting the tip of the resin pipe to the floor. The present invention relates to a pipe clipper used in a water supply pipe construction work to be attached to a one-touch type joint, a nut type joint or a bamboo shoot type joint provided near a surface. More specifically, by strongly holding the tip of the resin pipe configured to be able to be pulled out only a small length on the floor, it is possible to easily press-fit the tip of the resin pipe into the joint. The present invention relates to a pipe clipper as a tool configured to be capable of being used.

[0002]

2. Description of the Related Art Conventionally, as a tool for holding a resin pipe of this kind, a general metal tool such as pliers has been used. This metal tool has a pair of left and right clamps which are pivotally mounted in a lateral direction and a pair of oppositely rotatably mounted clamps for operating the rotation of the clamps. And an operation unit.

In order to press-fit the tip of the resin pipe into the joint (mounting work) by using the metal tool, first, the two operation parts are rotated to operate the two clamp parts. After turning in the direction away from each other,
Insert the tip of the resin pipe into the gap between both clamps. Subsequently, by rotating both operation parts in the opposite direction to the above, both clamp parts are rotated in directions approaching each other to hold (pinch and fix) the resin pipe. The mounting work of the joint is performed in this fixed state.

[0004]

However, since the resin pipe is formed in a cylindrical shape with almost no distortion and has no protruding portion on its outer peripheral surface, it is very slippery. The clamp portion of the metal tool and the outer peripheral surface of the resin pipe have slipped and rotated easily, or the resin pipe has fallen off between the two clamp portions. For this reason, since the resin pipe is not stably held, the working efficiency in the fitting work of the joint cannot be increased much.

Further, by applying a strong force to the operating portion, it is possible to increase the tightening force of the resin pipe by the two clamp portions, thereby preventing the resin pipe from rotating or falling off. However, in such a case, there is a risk that the resin pipe may be significantly deformed to be unrecoverable, or its outer peripheral surface may be damaged to cause water leakage.

The present invention has been made by paying attention to the problems existing in the prior art as described above. It is an object of the present invention to provide a pipe clipper configured to effectively prevent irreversible deformation and damage of a resin pipe and strongly pinch and fix the resin pipe. .

[0007]

According to a first aspect of the present invention, there is provided a pipe clipper having an arc-shaped notched inner surface which is in close contact with a resin pipe.
A pair of left and right clamps that are pivotally mounted in a lateral direction and an operation unit that operates the rotation of the clamps, and the two clamps are rotated in directions approaching each other. A pipe clipper configured to be able to pinch and fix the outer peripheral surface of the resin pipe with the inner surfaces of the two clamp portions, wherein the inner surfaces of the two clamp portions are subjected to a non-slip treatment. It is assumed that.

A pipe clipper according to a second aspect of the present invention is the pipe clipper according to the first aspect, wherein the non-slip treatment is a zinc phosphate conversion treatment.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 (a) and 1 (b), the pipe clipper 11 bends a steel plate formed in a substantially rectangular plate shape into a U-shaped cross section along a center line extending in the length direction. As a result, the first operating portion 1 formed in a long rod shape with one side edge opened.
2 and a second operation unit 13. These operation units 1
2 and 13 are disposed to face each other such that the opened side edges face each other.

[0010] A pair of left and right first and second clamp portions 14 and 15 each made of a substantially triangular plate-shaped steel material are opposed to the distal ends of the first and second operation portions 12 and 13. It is provided as follows. The tips of these clamps 14 and 15 are formed in the same shape.

A fixing portion 21 is provided at a base end portion of the first clamp portion 14 and is held in a gap between steel plates formed in a horizontal U-shape in a normal cross section constituting the first operation portion 12. Thus, it is fixed to the distal end of the first operation unit 12.

A pair of left and right rotating holes (not shown) are formed in the inner and outer ends on the base end side of the second clamp portion 15 in a circular hole shape. The proximal inner end of the second clamp portion 15 is sandwiched in a gap between the steel plates of the first operation portion 12 and is vertically installed on the distal end portion of the first operation portion 12. Attached so as to be rotatable in the horizontal direction (in the same plane formed by the first operation unit 12, the second operation unit 13, the first clamp unit 14, and the second clamp unit 15) via the first rotation shaft 22. Have been. Further, the second clamp portion 15
The base end side outer end portion of the second operation portion 13 is provided with a second rotation shaft 23 vertically extended in a gap between steel plates formed in a horizontal U-shape in a normal cross section. Is rotatably mounted on the shaft.

A hook hole 24 is formed in a circular hole at an intermediate position between the two rotation shafts 22 and 23 so that one end of a coil spring 25 constituting a lock means can be hooked. . The other end of the coil spring 25 is configured to be hooked on a hook (not shown) provided in the center of the first operation unit 12, and the second clamp unit is mounted around the first rotation shaft 22. 15 can be urged toward the rear side of the first operation unit 12 to be pulled.

At the center of the second operating portion 13, a lock member 31 constituting a locking means made of a steel material formed in the shape of a rectangular plate is formed in a U-shape in a front section of the second operating portion 13. The steel plate is sandwiched in a gap between the set steel plates, and is rotatably mounted in a lateral direction via a third rotating shaft 32 erected vertically in the gap. Further, the other end of the lock member 31 is locked so as to be slidable in the front-rear direction in the gap between the steel plates of the first operation portion 12.

That is, the other end of the lock member 31 is provided with a retaining projection 33 which extends vertically and is accommodated in a gap between the steel plates of the first operation portion 12. Further, the steel plate constituting the rear end of the first operation section 12 is formed in a substantially C-shape in a right cross section, and is configured so that the retaining projection 33 does not come out of the first operation section 12. I have. In addition, the other end of the lock member 31 is in contact with a distal end of a position adjusting bolt 35 screwed in a nut 34 fixed to the rear end of the first operation unit 12 so as to be adjustable in the front-rear direction. Touched. By moving the position adjusting bolt 35 back and forth to adjust the position, the distance between the first and second clamp portions 14 and 15 when the first and second clamp portions 14 and 15 are rotated and brought close to each other is reduced. It is configured so that it can be adjusted arbitrarily.

Further, at the rear end of the second operation unit 13,
A substantially bar-shaped unlocking member 36 is provided so as to be in close contact with the inner side surface of the steel plate having a horizontal U-shape in the front section and constituting the second operating portion 13. The unlocking member 36 is rotatably mounted in a lateral direction via a fourth rotating shaft 37 erected vertically in the gap between the steel plates of the second operating portion 13 and is rotatably mounted on the second operating portion 13. A biasing member (not shown) provided so as to straddle the four rotating shafts 37 is constantly biased outward.

The rear end of the unlocking member 36 is disposed so as to be slightly rearward of the rear end of the second operating portion 13, so that the rotation operation of the unlocking member 36 can be easily performed. Is available. Further, the inner edge of the front side of the lock release member 36 is a pressing portion 38 configured to press the central portion of the lock member 31, and the lock member 31 locks the resin pipe. (Clamping and fixing) state can be easily released.

On the other hand, inside the first clamp portion 14 and the second clamp portion 15, there are provided three pairs of notches 41 facing each other, which are cut out in arc shapes having different diameters. As shown in FIGS. 2A and 2B, the notches 41 are configured such that the resin pipe 51 can be sandwiched between each pair of the notches 41 facing each other.
The pair of notches 41 provided at positions opposing the clamps 14 and 15 are notch-formed in a plane elliptical shape, and are pinched and fixed while slightly crushing the outer peripheral surface of the resin pipe 51 in the lateral direction. It is configured to be able to. Further, the thickness (vertical width) of the steel material constituting both clamp portions 14 and 15 is increased in the vertical direction around the notch portion 41 in order to increase the holding area (contact area) with the outer peripheral surface of the resin pipe 51. The widened portion 42 is formed.

Further, the entire inner surface of the notch 41 is subjected to a parkerizing treatment (manganese or zinc).
Resin pipe 5 which has been subjected to anti-slip treatment by
1 is configured such that the outer peripheral surface (surface) does not easily rotate or fall off. In this parkerizing treatment, a phosphate conversion coating is formed on the surface of the steel material constituting the notch 41 by treating the steel material with the phosphate solution.

In addition, instead of the parkerizing process, a blast process such as a sand blast process or a shot blast process may be used. These anti-slip treatments can increase the coefficient of friction with respect to the outer peripheral surface of the resin pipe 51 by forming a rough surface having minute irregularities on the inner end surface of the notch 41 so as to exhibit an anti-slip effect. Is configured.

Further, among the above-mentioned parkerizing treatments, a zinc phosphate chemical conversion treatment is most preferred because the anti-slip effect on the surface of the resin pipe is extremely high. This zinc phosphate chemical conversion treatment is a treatment for forming a highly corrosion-resistant film of zinc phosphate on the surface of a steel material, and forms a rough surface composed of minute irregularities on the surface. In addition, the zinc phosphate chemical conversion treatment is preferably performed by dipping at a temperature of 70 to 99 ° C. for 10 to 20 minutes because it is simple and has a high anti-slip effect.

On the other hand, the material of the resin pipe 51 is preferably polyethylene, cross-linked polyethylene or polybutene, since it has a high anti-slip effect on the surface of the notched portion 41 subjected to the parkerizing treatment.

The operation of the pipe clipper 11 will be described below. Now, using the pipe clipper 11 to connect the tip of the resin pipe 51 extending under the floor to a one-touch joint provided near the floor, the following is performed. That is, first, the first operation portion 12 and the second operation portion 13 of the pipe clipper 11 are rotated in a direction away from each other while using the urging force of the coil spring 25, so that the first operation portion 12 and the second operation portion 13 By rotating the second clamp portion 15, the two clamp portions 14,
15 apart. As a result, the pipe clipper 11 is in the state shown in FIG.

Next, in a state where the resin pipe 51 is inserted between the notches 41 having a size corresponding to the outer diameter of the resin pipe 51, both operating portions 1 are pressed against the urging force of the coil spring 25.
A rotation operation is performed between the members 2 and 13 in directions approaching each other. Then, as shown in FIG.
While the resin pipe 51 is held between the pipes 5, the pipe clipper 11 is in a state shown in FIG. At this time, in the pipe clipper 11, the second operation unit 1
The front end of the lock member 3 and the lock member 31 are arranged on the same straight line and extend substantially in parallel with the coil spring 25, so that a stable lock state cannot be easily rotated in the lateral direction.

Further, at this time, as shown in FIGS. 2A and 2B, the resin pipe 51 sandwiched between the notches 41 is slightly crushed in the lateral direction at the portion. It has a flat cross-section elliptical cylindrical shape. Further, since the entire contact surface (holding surface) that is in contact with the notch portion 41 is subjected to a non-slip treatment, the pipe clipper 1
The rotation and the falling off of the resin pipe 51 with respect to 1 are effectively prevented.

Next, with the two operating portions 12, 13 of the pipe clipper 11 to which the non-slip-locked resin pipe 51 is sandwiched and fixed, held by hand, the tip of the resin pipe 51 is inserted into the one-touch joint. Press and fit. At this time, even when the resin pipe 51 is pulled out only a small length on the floor, the one-touch joint of the resin pipe 51 is secured because the pipe clipper 11 strongly holds and fixes the resin pipe 51. Press-fitting work can be easily performed inside.

Finally, after the press-fitting operation is completed, the pipe clipper 11 is separated from the resin pipe 51. That is, by rotating the rear end portion of the unlocking member 36 inward of the pipe clipper 11, the pressing portion 38
Presses the lock member 31 in the same direction. Then, the second operating portion 13 is pressed and rotated outwardly of the pipe clipper 11 by a reaction force when the pressing portion 38 presses the lock member 31. Further, at this time, the rotation of the second operation portion 13 is assisted by the urging force of the coil spring 25. Then, with the rotation of the second operation unit 13,
The second clamp portion 15 is rotated in a direction away from the first clamp portion 14, so that the resin pipe 51 sandwiched between the notches 41 is released from the clamped and fixed state.

The effects exerted by the above embodiment will be described below. The pipe clipper 11 has a notch 41 that forms the inner part of a pair of left and right clamps 14 and 15 facing each other.
The inner surface of the is subjected to a non-slip treatment. For this reason, the resin pipe 51 can be strongly pinched and fixed, and the resin pipe 51 can be effectively prevented from being permanently deformed or damaged.

Particularly when the resin pipe 51 integrated with the sheath pipe is extended under the floor of a building, the resin pipe 51 is usually fixed by a saddle at intervals of one meter. It is very difficult to pull out long on the floor. Furthermore, when performing the press-fitting work on the joint with a small length of the resin pipe 51 pulled out on the floor in a narrow place, it is necessary to strongly hold the resin pipe 51 and apply a force for press-fitting. . On the other hand, the pipe clipper 11 of the present embodiment can easily perform the press-fitting work to the joint without pulling out the tip of the resin pipe 51 to the floor for a long time, and easily and surely even in a narrow place. 51 can be held.
Therefore, the work efficiency in the press-fitting work can be significantly improved, and the occurrence of water leakage due to insufficient press-fitting to the joint can be effectively prevented.

By making the anti-slip treatment applied to the inner surface of the notch 41 a zinc phosphate chemical conversion treatment, the anti-slipping of the resin pipe 51 can be performed more effectively. In addition, an anticorrosion effect can be exhibited.

The present embodiment can be embodied with the following modifications. In the above embodiment, the case where the resin pipe 51 extending under the floor is attached to the joint has been described. For example, the resin pipe 51 extending along the back of the wall or the ceiling is described.
The pipe clipper 11 may be used when the pipe clipper 11 is attached to a joint.

A resin pipe 5 that hardly elastically deforms
1 may be applied. At this time, by adjusting the position of the position adjusting bolt 35 back and forth,
It is preferable that the planar shape between the notches 41 when the substrates 4 and 15 are brought close to each other (the state shown in FIG. 1B) is circular.

Coil spring 25 constituting locking means
And the lock member 31 may be omitted. Alternatively, the lock release member 36 may be omitted. -The pipe clipper 11 may be formed in the same shape as a commonly used pliers. That is, the first operation unit 12
And the second operation part 13 are formed symmetrically, the first clamp part 14 and the second clamp part 15 are formed symmetrically, and the first operation part 12 and the second clamp part 15 are formed of steel. In addition to being integrally formed, the second operation portion 13 and the first clamp portion 14 may be integrally formed of a steel material, and the two members may intersect with each other and be pivotally mounted at the intersection at the intersection.

Further, a technical idea which can be grasped from the above embodiment will be described below. (1) The pipe clipper according to any one of (1), (2), and (1), wherein the inner surface of the clamp portion subjected to the anti-slip treatment is formed in an elliptical arc shape. In the case of such a configuration, the resin pipe can be more strongly fixed by pinching while slightly crushing the resin pipe into an elliptical cross section,
It can be quickly restored to its original shape.

(2) A lock means is provided for locking the rotation of the clamps and the operating portions in a state in which the clamps are rotated in directions approaching each other. The pipe clipper according to any one of claims 2 and (1).

(3) The resin pipe according to any one of (1), (2), (1) and (2), wherein the resin pipe is made of a synthetic resin capable of being slightly elastically deformed. Pipe clipper.

(4) The pipe according to any one of (1) to (3), wherein the material of the resin pipe is polyethylene, crosslinked polyethylene or polybutene. Clipper.

[0038]

As described above in detail, according to the present invention, the following effects can be obtained. According to the pipe clipper of the first aspect of the present invention, the resin pipe can be strongly pinched and fixed while effectively preventing unrecoverable deformation and damage of the resin pipe.

According to the pipe clipper of the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to more effectively prevent the resin pipe from being clamped and fixed.

[Brief description of the drawings]

FIG. 1A and FIG. 1B are plan views each showing a pipe clipper according to an embodiment.

2A is a partially enlarged plan view showing a state in which a pipe is held by a pipe clipper according to the embodiment, and FIG. 2B is a cross-sectional view taken along line 2b-2b in FIG. 2A.

[Explanation of symbols]

Reference numeral 11 denotes a pipe clipper, 12 denotes a first operation unit constituting an operation unit, 13 denotes a second operation unit constituting an operation unit, 14 denotes a first clamp unit as a clamp unit, 15 ... a second clamp unit as a clamp unit. Reference numeral 41 denotes a cutout as an inner surface, and 51 denotes a resin pipe.

Claims (2)

[Claims] 1. A pair of left and right clamps, each having an inner side notched in an arc shape in close contact with a resin pipe and axially rotatably mounted on a shaft, and operating rotation of the clamps. A pipe configured to be able to pinch and fix the outer peripheral surface of the resin pipe on the inner side surfaces of the two clamp portions by rotating the two clamp portions in directions approaching each other. A clipper, wherein an inner surface of each of the clamp portions is subjected to a non-slip treatment. 2. The pipe clipper according to claim 1, wherein the non-slip treatment is a zinc phosphate conversion treatment.