JPH07108608A - Clamping device - Google Patents

Abstract

PURPOSE:To provide a clamping device which can bring an outer periphery of a synthetic resin tube into pressure contact with a curved surface of a saddle of a branch tube joint by a uniform pressing force. CONSTITUTION:A pair of connectors 4 are rotatably supported to both end sides of a support 3, and engaging pieces 41 to be engaged with collars 210 of a saddle 21 are provided at leading end insides of the connectors 4. On the other hand, a shaft rot 5 is inserted to an intermediate position of the support 3, and a pressing plate 51 in pressure contact with an outer periphery of a synthetic resin tube 1 is provided at its leading end of the rod 5. A cam member 6 having an operating rod 61 us supported to substantially a center of the support 3, and when the member 6 is rotated by the rod 61, the member 6 is brought into pressure contact with a back surface of the plate 51. Thus, the tube can be effectively, rigidly adhered or fusion-bond-connected to a branch tube joint.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device used for adhering or fusion-bonding a saddle of a branch pipe joint to an outer peripheral surface of a synthetic resin pipe.

[0002]

2. Description of the Related Art Generally, when a saddle of a branch pipe joint is bonded or fusion-bonded to the outer peripheral surface of a synthetic resin pipe, a predetermined time is required until the joining is completed while the curved surface of the saddle is pressed against the outer peripheral surface of the synthetic resin pipe. Need to hold. Therefore, as conventionally proposed in Japanese Patent Publication No. 5-59315,
The upper and lower surfaces of the synthetic resin pipe are sandwiched between the saddle of the branch pipe joint and the stirrup member, and one end of the stirrup member is engaged with one of the collars of the saddle and the other end of the stirrup member and the saddle. A clamp device for fixing the other flange portion to the other flange portion with a cam member has been used.

[0003]

However, like this clamp device, one end portion of the stirrup member is engaged with one of the collar portions of the saddle, and the other end portion of the stirrup member and the other collar portion of the saddle are engaged. When the and are fixed by a cam member, the outer peripheral surface of the synthetic resin pipe and the curved surface of the saddle of the branch pipe joint sometimes hit against each other, so that strong adhesion or fusion bonding may not be obtained.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the outer peripheral surface of the synthetic resin pipe and the curved surface of the saddle of the branch pipe joint are brought into pressure contact with each other with a uniform pressing force to obtain strong adhesion or fusion bonding. The present invention provides a clamp device.

[0005]

According to the clamp device of the present invention, a pair of locking bodies are rotatably supported on both ends of a supporting body, and the collars of the saddle are provided inside the tips of the respective locking bodies. A hooking piece that engages the portion is provided. On the other hand, a shaft plate is inserted at an intermediate position of the support body, a pressing plate is provided at the tip end thereof for contacting with the outer peripheral surface of the synthetic resin pipe, and a cam member provided with an operating handle is provided substantially at the center of the support body. Support. Further, when the cam member is rotated by the operating handle, the cam member presses the back surface of the pressing plate.

[0006]

With the above construction, when the cam member is rotated by the operating handle to press the back surface of the pressing plate, the outer peripheral surface of the synthetic resin pipe and the curved surface of the saddle of the branch pipe joint are pressed with equal pressing force. .

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a front view of a clamp device showing an embodiment of the present invention, FIG. 2 is a partially cut side view, and FIG. 3 is a schematic view for explaining the axial support state of a support body and a locking body. Reference numeral 1 denotes a synthetic resin pipe such as polyethylene, and 2 denotes a branch pipe joint made of synthetic resin such as polyethylene. A saddle 21 having a curved surface equal to the outer peripheral surface of the synthetic resin pipe 1 is provided at one end of the branch pipe joint 2, and a heating wire is embedded in the curved surface of the saddle 21. A is a clamp device used when joining the synthetic resin pipe 1 and the branch pipe joint 2.

The clamp device A has a structure in which a pair of locking bodies 4 are rotatably supported by both ends of a support body 3.
That is, the rectangular shaft rod 42 provided at the base of the locking body 4 is mounted in the shaft hole 31 provided in the support body 3, and the shaft rod 42 is provided above the shaft hole 31 as shown in FIG. The locking body 4 does not fall down while it is fitted in the long hole 311. When the locking body 4 moves downward and the shaft rod 42 descends to the round hole 312, the locking body 4 can be rotated as indicated by an arrow in the figure. Incidentally, 310 is a stopper step portion that regulates the rotation of the locking body 4.

Further, a hooking piece 41 is provided on the inner side of the tips of the pair of locking bodies 4, and when the locking bodies 4 and 4 are erected, the locking piece 41 is held by the collar portion 210 of the saddle 21. Can be engaged with.

On the other hand, shaft rods 5, 5 are inserted at two intermediate positions of the support body 3, and a pressing plate 51 is in contact with the outer peripheral surface of the synthetic resin pipe 1 at the tip of each shaft rod 5. Is provided. A coil spring 52 is mounted between the other end of the shaft 5 and the support body 3, and the elastic force of the coil spring 52 urges a force for retracting the pressing plate 51. Further, substantially the central portion of the support body 3, that is, the shaft rod 5,
A cam member 6 is rotatably supported between the pressing members 51, 51, and an operating rod 61 is connected to the cam member 6. Then, when the operation member 61 is grasped and the cam member 6 is rotated, the cam member 6 presses the back surfaces of the pressing plates 51, 51.

Next, a procedure for joining the branch pipe joint 2 to the synthetic resin pipe 1 using the clamp device A will be described. First, as shown in FIG. 1, a branch pipe joint 2 is put in place on the synthetic resin pipe 1.
Is set, and the clamp device A is set from below the synthetic resin pipe 1. At this time, the locking body 4 moves downward to move the shaft 4
Since 2 is located in the round hole 312 of the shaft hole 31, the locking body 4 can be rotated with respect to the support body 3.

Then, the respective locking bodies 4 and 4 are erected so that the hooking piece 41 is engaged with the collar portion 210 of the saddle 21. At this time, since the pressing plate 51 provided at the tip of the shaft rod 5 is retracted by the elastic force of the coil spring 52, it does not contact the outer peripheral surface of the synthetic resin pipe 1. Therefore, the operation pad 6
1 is grasped, the cam member 6 is rotated, and the cam member 6 is pressed against the back surfaces of the pressing plates 51, 51. Then, the respective pressing plates 51, 51 are brought into pressure contact with the outer peripheral surface of the synthetic resin pipe 1, whereby the curved surface of the saddle 21 is brought into pressure contact with the outer peripheral surface of the synthetic resin pipe 1 with a uniform pressing force.

In this manner, after the saddle 21 of the branch pipe joint 2 is pressed against the outer peripheral surface of the synthetic resin pipe 1, the heating wire embedded in the curved surface of the saddle 21 is heated to generate heat. The outer peripheral surface and the curved surface of the saddle 21 are fusion-bonded. After this joining work is completed, the cam member 6 is rotated in the opposite direction to separate it from the back surfaces of the pressing plates 51, 51, the support 3 is slightly lifted, and the respective locking bodies 4, 4 are tilted left and right. Remove the clamp device A.

The clamp device of the present invention can also be used for connecting a branch pipe joint in which a heating wire is not buried in the curved surface of the saddle. For example, it can be used when the outer peripheral surface of the synthetic resin pipe and the saddle curved surface of the branch pipe joint are simultaneously melted by an electric heating iron and then fusion-bonded. It can also be used in the case of adhesively bonding with an adhesive interposed between and.

[0015]

As described above in detail, when the clamp device of the present invention is used, the outer peripheral surface of the synthetic resin pipe and the saddle curved surface of the branch pipe joint are pressed against each other with a uniform pressing force without being pressed against each other. Therefore, the synthetic resin pipe and the branch pipe joint can be reliably and firmly bonded or fusion-bonded to each other.

[Brief description of drawings]

FIG. 1 is a front view of a clamp device showing an embodiment of the present invention.

FIG. 2 is a partially cut side view of the clamp device shown in FIG.

FIG. 3 is a schematic diagram for explaining a shaft support state between a support body and a locking body.

[Explanation of symbols]

 1 Synthetic resin pipe 2 Branch pipe joint 3 Support 4 Locking body 5 Shaft rod 6 Cam member A Clamp device

Claims (1)

[Claims] 1. A clamp device used for adhering or fusion-bonding a saddle (21) of a branch pipe joint (2) to an outer peripheral surface of a synthetic resin pipe (1) under pressure contact, which comprises a support ( 3) A pair of locking bodies (4) are rotatably supported at both ends of the locking body (3), and are engaged with the collar portion (210) of the saddle (21) inside the tips of the locking bodies (4). Hook piece (4
1) is provided, on the other hand, a shaft plate (5) is inserted at an intermediate position of the support body (3), and a pressing plate (51) is provided at the tip end thereof to come into contact with the outer peripheral surface of the synthetic resin pipe (1). Support (3)
Cam member (6) provided with an operating handle (61) at approximately the center of the
A clamp device characterized in that the cam member (6) presses the back surface of the pressing plate (51) when the cam member (6) is pivotally supported and the operating member (61) is rotated. .