JPH06134678A - Clamp jig for pipe connection - Google Patents

Abstract

PURPOSE:To certainly fix a coupler and a pipe of a connection part, simlify the structure and reduce the weight by providing a clamping part to clamp both of upper and lower members with each other at an end part of a joint part as the both upper and lower members cross with each other at a side part of the joint part. CONSTITUTION:A joint part is provided between a semi-circular arc part and a clamping part to sandwich a pipe, and both of upper and lower members 10, 20 cross with each other. When both of the upper and lower members 10, 20 are clamped at the clamping part, a faucet outside surface of a coupler 8 and a pipe installed between semi-circular arc parts of both of the upper and lower members 10, 20 are sandwiched and fixed. Sandwiching force at the semi-circular arc part has force stronger than clamping force of bolt nut clamping parts 30, 40 depending on a position of the joint part. Additionally, a sandwiching part simultaneously sandwiches and holds the coupler faucet outer surface and the outer surface of a pipe 7 inserted into the faucet. Consequently, individual fusion connection parts of the coupler faucet are independently and perfectly fixed and they are not put in connection 111 a moving and bent state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp jig for holding the outer surface of a connecting resin pipe inserted into a receiving opening of a joint, and more specifically, to a resin joint having a heating wire attached to the inner surface of the receiving opening. The present invention relates to a clamp jig for holding a joint and a pipe so that they will not move until the fusion connection is completed when the fusion connection is made with the inserted resin pipe.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 7 and 8, two movable clamp devices 2 are provided on a base 1, and a joint 8 and a polyethylene pipe or the like inserted on both sides thereof are provided between the clamps 2. The resin pipe 7 is arranged on the lower clamp 3 of the clamp device 2, and the upper clamp 4 rotatably fixed to one side of the lower clamp 3 is put on the upper faces of the pipes 7 on both sides, and the bolt is attached on the other side.
There is one in which upper and lower clamps are clamped by nuts and the pipes 7, 7 inserted on both sides of the joint 8 are clamped and fixed.

As another conventional example, as shown in FIG. 9 and FIG. 10, a semi-circular arc portion 65 along the outer surface of the pipes 7, 7 is divided into two branches so that the pipes 7, 7 inserted on both sides of the joint 8 can be sandwiched.
And the lower clamp 9 provided with the semi-circular arc portion 95 are rotatably coupled at one side end portion of the tube shaft to form the clamp portions 65, 95 and the end coupling portions 66, 96. The bolts 97 fixed to the lower clamp 9 are projected between the upper clamp 6 and the nuts 98 to fasten the lower clamp 9 and the upper clamp 6 to each other.
There is one that clamps and fixes.

[0004]

In all of the above-mentioned prior arts, the pipes 7, 7 inserted into the both side receiving ports of the joint 8 are clamped and fixed, and the central joint 8 is not fixed.
Therefore, before the fusion splicing is completed, the joint may be moved by a cable or the like which energizes the heating wire on the inner surface of the joint, and when the joint 8 moves, the fusion splicing with the pipe 7 is surely performed. Absent. Further, the polyethylene pipe to be fusion-bonded usually has a large variation in outer diameter and roundness. If you have a clamping part that clamps two parts at the same time, if one of the tubes is distorted, both clamping parts cannot hold with the same clamping force, and one clamping part holds. If you can't, it can happen. Also, if the pinch part is made of a hard material such as iron or aluminum alloy, the surface of the tube will be scratched when clamped because it is forcibly tightened even with a distorted tube. Further, after clamping, the semi-circular arc portion of the sandwiching portion bites into the distorted surface of the tube, making it difficult to remove the jig.

In the former technique, since the base 1 is provided with the movable clamp devices 2 and 2, it is variable in the longitudinal direction of the pipe and flexible in the fixed position in the longitudinal direction. Since it is necessary, it becomes heavy and can only be used by installing it on the ground or a workbench on the ground. Therefore, when it is used in an incomplete installation state such as in the air in the actual buried piping work, the pipe 7 is bent downward due to the weight of the jig, and the joint 8 and the pipe 7 cannot be fixed in a straight line. There is a problem that you cannot pipe in a straight line.

The latter technique can be used in aerial pipes and the like because it is small in shape and light in weight because it does not have a base, but when the clamp parts 65 and 95 are attached to or detached from the pipe 7, the bolt 9 is used.
It is necessary to loosen or tighten the nut 98 that is screwed into the pipe 7 by the length of the outer diameter of the pipe 7, and the tightening rotation speed of the nut 98 at the time of clamping becomes large, resulting in poor workability. Further, the clamping force with respect to the pipe 7 is smaller than the bolt clamping force because the bolt-nut tightening portion is located between the joining portion and the sandwiching portion. The present invention solves the above-mentioned problems, and securely holds and holds the two sandwiched portions, the joint does not move during the connection of the joint and the pipe, and the synthetic resin pipe can be easily attached and detached and fixed. A clamp jig for connection is provided.

[0007]

SUMMARY OF THE INVENTION A gist of the present invention is a clamp jig for holding an outer surface of a resin pipe to be connected, which is inserted into a receiving end on one end side of a joint, and extends along the outer surface of the receiving port and the outer surface of the pipe. It is composed of a lower member having two semi-circular portions on the upper surface and an upper member having two semi-circular portions on the lower surface along the receiving surface of the joint and the outer surface of the pipe. A connecting portion that rotatably connects at a side portion is provided, and further at a side portion of the connecting portion, the upper and lower members are alternately crossed, and a tightening portion for fastening the upper and lower members to each other is provided at an end thereof. Is a clamp jig for connecting pipes.

In the above, the tightening portion has a bolt rotatably connected to the upper member at the end where the upper and lower members alternately intersect, a long groove provided at the end of the lower member, and a screw of the bolt. It may be provided by a handle nut that is locked to the upper surface of the end of the mating lower member.

Furthermore, a clamp jig for holding the outer surface of the resin pipe to be connected, which is inserted into the receiving port on one end side of the joint,
A pipe having two clamping portions for clamping the jig and one upper and lower semi-circular arc portions, wherein an elastic member is provided on the inner surface of the semi-circular arc portion. It is a clamp jig for connection.

[0010]

According to the present invention, as described above, the connecting portion is provided between the semi-circular arc portion for sandwiching the pipe and the tightening portion, and the upper and lower members intersect with each other. When is tightened, the outer surface of the joint receiving port mounted between the semi-circular portions of the upper and lower members and the pipe are clamped and fixed. The clamping force at the semi-circular arc portion can be higher than the tightening force of the bolt nut tightening portion depending on the position of the connecting portion. Further, since the sandwiching portion simultaneously sandwiches and holds the outer surface of the joint receiving port and the outer surface of the pipe inserted in the receiving port, the fusion splicing portion of each joint receiving port is completely fixed independently and is connected in a moving or bent state. There is no such thing.

In the above, the tightening portion is constituted by the bolt rotatably coupled to the upper member, the long groove provided at the end of the lower member, and the handle nut screwed with the screw of the bolt. Since it can be easily attached to or detached from the long groove of the end portion, the rotation of the handle nut screwed with the bolt can be minimized and the clamp work can be easily performed.

Further, in the case of having two clamping parts which are clamped by two upper and lower semi-circular arc parts for one tightening part for clamping the jig, an elastic member is provided on the inner surface of the semi-circular arc part. Even if the pipe to be sandwiched is distorted, the elastic member serves as a cushion to absorb the strain of the pipe when sandwiched.
Therefore, the sandwiching force of both sandwiching portions is averaged, and both sandwiching portions can be reliably sandwiched and fixed. Furthermore, the tube is not scratched, and since the contact surface is an elastic material, it does not bite into the tube, and the jig can be easily attached and detached.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a lower member 10 of the clamp jig of the present invention. The left side of the figure corresponds to the part where the joint 8 and the pipe 7 of the connecting part are sandwiched, and the right side of the figure corresponds to the tightening part for applying force. . The portion sandwiching the joint 8 and the pipe 7 is bifurcated, and one has a semi-circular arc portion 16 along the outer surface of one end of the joint, and the other has a semi-circular arc portion 11 along the outer surface of the pipe on the upper surface of each half. Arc part 1
Elastic members such as sponge and soft rubber are attached to the inner surfaces of 6 and 11. The above-mentioned bifurcated semi-circular arc portion 16, 1
1 is integrated in the central portion, and projections 12 and 12 for coupling with an upper member of the mating member project upward, and the projection 12 has a pin hole 1
3 and 13 are provided. In addition, the above-mentioned both semi-circular arc portions 16 and 11
Are both semi-circular arc parts 11 and 1 at the ends to reinforce each other.
6 may be bridged and connected.

The right side of the projection 12 is bent upward so that the lower surface is above the central axis of the semi-circular arc portions 16 and 11, and an end portion 12 is provided with a long groove 14 through which a bolt 30 is inserted. The upper surfaces 15 on both sides of the long groove 14 are engaging surfaces 15 that engage with the lower surface of the handle nut 40 screwed onto the bolt 30.

FIGS. 3 and 4 show the upper member 20, which is assembled with the lower member 10. The left side of the figure corresponds to the part where the joint 8 and the pipe 7 are sandwiched, and the right side of the figure corresponds to the tightening part.
The portion to be clamped is divided into two parts so that the joint 8 and the pipe 7 can be clamped, and the semi-circular arc portion 2 along the outer surface of the receiving port of the joint and the outer surface of the pipe.
6 and 21 are provided on the lower surface side. Elastic members are attached to the inner surfaces of the semi-circular portions 26 and 21 as in the case of the lower member 10. Further, in order to reinforce the two semi-circular arc portions 26 and 21, the two semi-circular arc portions 21 and 26 may be connected by bridging the both semi-circular arc portions 21 and 26 with each other. The two semi-circular arcs divided into two parts are integrally formed at the center so that the lower member 10 and the connecting projections 22 and 22 are formed so as to project downward so as to be inside the projection 12 of the lower member 10. The projection 22 is provided with pin holes 23, 23. Further, on the end side further than the projection 22, it is bent downward so that the upper surface is located below the center of the semi-circular arc portion 21, and a bifurcated portion 24 for connecting with the head of the bolt 30 is provided at the end portion thereof. Part 2
4 is provided with a pin hole 25.

5 and 6 show a state in which the lower member 10 and the upper member 20 are assembled. The pin 5 is inserted into the pin hole 13 of the protrusion 12 of the lower member 10 and the pin hole 23 of the protrusion 22 of the upper member 20.
Zeros are inserted and rotatably coupled to each other. Then, the head 31 of the bolt 30 is attached to the forked part 24 provided at the end of the upper member 20, and the pin 60 is inserted into the pin hole 32 formed in the head 31 and the pin hole 25 of the forked part 24 to rotate. Is connected to. Reference numeral 40 denotes a handle nut screwed to the bolt 30, the lower surface of which is engaged with the engaging surface 15 of the lower member 10 to tighten the ends of the upper and lower members 10 and 20.

To remove the clamp jig from the pipe, loosen the handle nut 40 and tilt it to the right in FIG.
0 is disengaged from the long groove 14 of the lower member 10. Further, when tightening, the bolt 30 can be easily mounted in the long groove 14 by rotating and raising it to the left side in the drawing. Bolt 30 in long groove 14
And the handle nut 40 is tightened, the semi-circular arc portion on the left side of the drawing sandwiches the joint 8 and the pipe 7 in the direction in which they are compressed. Therefore, the handle nut can be easily operated during the clamping work.

Since the pin connecting portion 50 is located between the sandwiching portion and the tightening portion, it is possible to obtain a sandwiching force for the pipe which is equal to or greater than the bolt tightening force. Even when the pipe is distorted, the elastic member on the inner surface of the sandwiching portion absorbs the strain of the pipe, so that a uniform force acts on the pipe at both two sandwiching portions to secure it in place. Further, even when the jig is removed from the pipe, the pinching portion does not bite into the pipe, so that it can be easily performed.

[0019]

As described above, according to the present invention, the joint and the pipe of the connecting portion are securely fixed, the structure is simple and the weight is light, and the two sandwiching portions are fixed with a uniform force, and a large tightening force is provided. Is obtained and the workability is good. Further, even if the shape of the joint is a curved pipe such as an elbow or a tooth, it can be easily dealt with since it can be fixed for each receiving port of the joint.

[Brief description of drawings]

FIG. 1 is a plan view showing a lower member 10 of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view showing an upper member 20 of the embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a plan view showing a state where the upper member and the lower member of the embodiment are assembled.

FIG. 6 is a sectional view taken along line CC of FIG.

FIG. 7 is a plan view showing a conventional example.

FIG. 8 is a side view of FIG. 7.

FIG. 9 is a plan view showing another conventional example.

10 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

 7 Resin Pipe 8 Joint 10 Lower Member 11, 21 Semi-Arc Part 12, 22 Protrusion 13, 23 Pin Hole 14 Long Groove 20 Upper Member 24 Bifurcated Member 30 Bolt 40 Handle Nut 50, 60 Pin

Claims (3)

[Claims] 1. A clamp jig for holding an outer surface of a resin pipe to be connected, which is inserted into a receiving end on one end side of a joint, and which has, on an upper surface, two semi-circular portions extending along the outer surface of the receiving port and the outer surface of the pipe. A side member and an upper member having on its lower surface two semi-circular arc portions extending along the receiving outer surface of the joint and the outer surface of the pipe,
The upper and lower members have a connecting portion that is rotatably connected to one side portion of the tube shaft, and the upper and lower members are alternately crossed on the side portion of the connecting portion so that the upper and lower members are joined at their ends. A clamp jig for connecting pipes, which is provided with a tightening portion for tightening each other. 2. The tightening portion includes a bolt rotatably coupled to an upper member at an end where upper and lower members are alternately crossed, a long groove provided at an end of the lower member, and a screw of the bolt. The clamp jig for connecting pipes according to claim 1, comprising a handle nut that is locked to the upper surface of the end of the lower member. 3. A clamp jig for holding an outer surface of a resin pipe to be connected, which is inserted into a receiving end on one end side of a joint, and which is clamped between a single tightening portion and two upper and lower semi-circular arc portions. A clamp jig for pipe connection, characterized in that, in the case of having two sandwiching parts to be attached, an elastic member is provided on the inner surface of the semi-circular arc part.