JPH07329184A - Fusion machine - Google Patents

Abstract

PURPOSE:To provide a fusion machine equipped with a mechanism for preventing a tube and a coupling from becoming bent and axially misaligned when fixing a clamp and therefore, highly ensuring a fusion connection. CONSTITUTION:A flat plate 5 for regulating the socket terminal face of a coupling J to be held is arranged orthogonally with the holding center of the clamp, on the clamp 3 on a clamp side, and the flat plate 5 is supported in such a manner that it is freely displaceble (freely rotatable) with the base 3b of the clamp 3 on the coupling side. In addition, the flat plate 5 is selectively arranged at either of a position where the socket terminal face of the coupling J to be held by the clamp 3 is restricted or a position which does not interface with a position where a heater 4 is arranged when a fusion connection takes place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fusing machine for fusing and joining a synthetic resin pipe and a joint.

[0002]

2. Description of the Related Art As a fusion machine used for connecting synthetic resin piping materials, for example, a pipe and a joint are respectively held by a pair of clamps, and a heater face is used for each joint surface of the pipe and the joint. After heating and melting by heating, there is a structure in which the pipe and the joint are brought close to each other by the relative movement of the clamps to bring their joint surfaces (melting portions) into contact and to perform fusion bonding (for example, actual Kaihei 2-10171
No. 8).

As a clamp for this type of fusion machine, a clamp port having a V-shape, for example, and having a mechanism for tightening the outer peripheral surfaces of pipes and joints is generally used.

[0004]

By the way, according to the fusion machine of this type, the clamp for gripping the pipe usually has a structure of four-point support, and therefore, the axis of the joint is the same as that of the pipe. If the core is misaligned in a clamped state, such as when it is tilted with respect to the axis, it may cause bending at the joint portion, which may cause partial joint failure or the like, which may cause water leakage failure. In order to prevent this, accurate alignment between the pipe and the joint is required, but it is difficult to match the axial center with the clamp grip center when fixing the joint, especially with the conventional fusion splicer. Met. That is, since the outer surface of the joint is uneven or tapered, it is very difficult to accurately determine the angle of the receiving end face of the joint by simply sandwiching it with the V-shaped clamp.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a mechanism for preventing bending misalignment between a pipe and a joint during clamp fixing. Therefore, it is an object of the present invention to provide a fusion machine with high reliability of fusion bonding.

[0006]

In order to achieve the above-mentioned object, the fusion machine of the present invention is, as shown in FIGS. 1 and 2 corresponding to the embodiment, a joint side of a pair of clamps 2 and 3. A flat plate 5 for defining the receiving end face of the joint J to be gripped is arranged in the clamp 3 of the above-mentioned plate 3 at right angles to the grip center of the clamp, and the flat plate 5 is the clamp 3 on the joint side.
Is displaceably (rotatably) supported with respect to the base 3b of
It is configured so that it can be selectively arranged at either of the position that defines the receiving end face of the joint J gripped by the clamp 3 or the position that does not interfere with the position where the heater 4 is arranged during fusion bonding. Is characterized by being present.

[0007]

Operation: Synthetic resin joints to be joined by this kind of fusion machine; since elbows, cheeses, reducers, flanges, sockets, etc. are usually injection molded products,
The receiving end face is perpendicular to the tube axis. Therefore, the flat plate 5 arranged at a right angle to the grip center of the clamp 3
Then, when clamping is performed with the receiving end face of the joint J in contact (see FIG. 2), the shaft center of the receiving port of the joint J is clamped to the clamp 3
It coincides with the center of grip of the tube, thereby eliminating the bending misalignment with the tube axis.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, the schematic structure of the fusion machine will be described with reference to the perspective view shown in FIG.

The pipe clamp 2 and the joint clamp 3 individually hold the pipe to be fusion-bonded and its joint, and are arranged on the base 1 so as to face each other. A heater 4 is arranged on the base 1 at a position between the pair of clamps 2 and 3.

Each of the clamps 2 and 3 has a tightening mechanism 20 and 3.
It is supported on the pedestals 2a and 3a through 0, and the clamps can be tightened and opened by rotating the handles 20a and 30a of the tightening mechanism. The pipe clamp 2 has a structure in which the pipe is gripped by four-point support in consideration of the case where the pipe to be connected is long.

The pedestal 2a of the pipe clamp 2 is slidably arranged on guides 1a and 1b extending along the longitudinal direction of the base 1 (the central axis direction of the clamp), and the joint clamp 3 is also provided. The gantry 3a is slidably disposed on guides 1c and 1d that also extend along the longitudinal direction of the base 1 via a vertical movement mechanism 5 described later. Therefore, the joint clamp 3 and the pipe clamp 2 can be relatively moved toward and away from each other, and the movement of each of the clamps 2 and 3 is performed by the hydraulic cylinder 6 (the joint clamp side is not shown). ) By the operation described later.

On the other hand, the heater 4 has a heater face 4a for heating a pipe (not shown) for heating the outer peripheral surface of the connecting portion.
And a joint heater face 4b for heating the inner peripheral surface of the joint of the joint J. Further, one end of the heater 4 is rotatably supported on the base 1 by a supporting mechanism (not shown), and the heater 4 is rotated by the rotating operation.
Can be arranged from the standby position (the standing state shown in FIG. 1) to an intermediate position between the pair of clamps 2 and 3, that is, a use position.
Further, an adjustment mechanism 4c for centering the heater face at the use position is provided at the tip of the heater 4. The heater faces 4a and 4b can be replaced depending on the diameter of the pipe / joint to be connected.

Now, what should be noted in the embodiment of the present invention is that a flat plate 5 is provided on the joint clamp 3 as shown in FIG. This flat plate 5 is attached to the joint clamp 3 by the joint J.
It is used for centering (determining the angle) when fixing the, and is arranged orthogonal to the grip center of the joint clamp 3. Further, the flat plate 5 is rotatably supported by the base 3b of the joint clamp 3 via the integrally processed arm 5a and pin 5b, and along a plane orthogonal to the grip center of the joint clamp 3, It can be moved to two positions, a standby position (a position that does not interfere with fusion bonding) and a use position (a central position of the joint clamp 3).

It should be noted that the movement of the flat plate 5 to the use position and the return to the standby position are carried out by a manual operation, and a stopper (for example, the arm 5a of the arm 5a) for restricting each position during the movement and the return. A dog or the like (not shown) that hits the side surface is provided on the base 3b of the joint clamp 3.

In setting the joint J in the embodiment of the present invention, first, the flat plate 5 is arranged at the center position of the joint clamp 3, and the flat end 5 of the joint J is brought into contact with the flat plate 5 for clamping. As a result, the joint J is set in a state in which the receiving end face of the joint J is orthogonal to the grip center of the joint clamp 3, that is, the axial center of the receptacle is aligned with the grip center of the clamp.

Here, the pipe to be connected is usually substantially circular in cross section and has no irregularities on the outer peripheral surface, and since it is fixed to the pipe hand clamp 2 by four-point support, it is only necessary to sandwich it in the clamp. The joint axis of the tube coincides with the grip center of the clamp. Therefore, due to the setting of the joint J described above, a bent misalignment does not occur between the pipe and the joint. When a parallel misalignment occurs between the pipe and the joint, the misalignment can be corrected by using a position adjusting mechanism (not shown) provided in any of the clamps 2 or 3.

After the above setting of the pipe and the joint J is completed, the heater 4 is arranged between the pair of clamps 2 and 3, and the heater face 4a, 4b is used to form the pipe and the joint J.
After melting and melting the respective joints, the heater 4 is removed, and then the clamps 2 and 3 are advanced to join the joints of the pipe to the joint J.
And then perform fusion splicing.

Here, as the material for the flat plate 5, a lightweight and corrosion-resistant material such as aluminum is suitable. Also,
The shape of the flat plate 5 is not limited to the rectangular shape, and may be another shape such as a circular flat plate.

Further, in the above embodiment of the present invention, the flat plate 5
Is rotatably arranged with respect to the base 3b of the joint clamp 3, but in addition to this, the flat plate 5 is slidably arranged along the base 3b so as to move to the above-mentioned use position and standby position. A structure that enables it may be adopted.

[0020]

As described above, according to the fusion machine of the present invention, since the flat plate for determining the angle of the receiving end face of the joint is arranged in the clamp on the joint side, the shaft center of the joint is clamped. It is possible to accurately match the grip center,
As a result, bending misalignment between the axis of the pipe and the axis of the joint is eliminated, and as a result, the reliability of fusion bonding is improved and stable bonding strength is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall structure of an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing a joint clamp 3 of the embodiment.

[Explanation of symbols]

 1 Base 2 Pipe Clamp 3 Joint Clamp 3b Base 4 Heater 4a, 4b Heater Face 5 Flat Plate 5a Arm 5b Pin J Joint

Claims (1)

[Claims] 1. A device for connecting a synthetic resin pipe and a joint, the pair of clamps being arranged on a base so as to face each other and capable of relative movement in directions toward and away from each other. In the state where the pipe and the joint are respectively gripped, the respective joint surfaces thereof are heated and melted by the heater via the heater face, and the respective melted portions are brought into contact with each other by moving the clamps to the approach side. In the fusion machine,
In the clamp on the joint side of the pair of clamps, a flat plate for defining the receiving end face of the joint to be gripped is arranged orthogonal to the grip center of the clamp, and the flat plate is the clamp on the joint side. Is displaceably supported with respect to the base, and is selectively positioned at a position that defines the receiving end face of the joint gripped by this clamp or a position that does not interfere with the position where the heater is arranged during the fusion bonding. A fusion splicer characterized in that it can be arranged in