JPS6213776Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a socket fusion machine suitable for use when fusion joining synthetic resin pipes using synthetic resin sockets.

[Prior art]

Conventionally, metal pipes have been used as city gas conduits, but medium-density polyethylene pipes have appropriate rigidity and flexibility as city gas conduits, and do not have the problem of underground corrosion like metal pipes. It has the excellent property of being able to be used semi-permanently.

Usually, a polyethylene socket is used to join polyethylene pipes, the outer surface of the end of the pipe and the inner surface of the socket opening are heated and melted with a heater, and the molten pipe and socket are engaged and pressed with a constant pressure. Fusion bonding is performed by leaving the material for a certain period of time to cool and solidify.

In order to perform this work efficiently and to ensure reliable fusion bonding, it is necessary to specify the length of insertion of the pipe into the socket.
Another purpose is to prevent deformation of the tube and socket during fusion and maintain roundness.

[Problem that the invention attempts to solve]

This invention was created in consideration of these matters,
To specify the length of insertion of a pipe into a socket, to enable easy engagement of the pipe and socket even if the length of insertion of the pipe into the socket changes, and to maintain the roundness of the pipe and socket. The present invention aims to provide a socket fusion machine.

[Means for solving problems]

Therefore, according to the present invention, in a fusion splicer designed to fusion-bond a pipe and a socket, as shown in the drawing, a clamp consisting of a two-split ring that clamps the pipe and a two-split ring that clamps the socket are used. one of the clamps is fixed, the other clamp is movable toward the fixed clamp, and one of the fixed and movable clamps has a lateral A socket welding machine comprising: one gripping rod protruding from the other clamp; and at least two gripping rods each protruding laterally from the other clamp and having different distances from the gripping rod of the one clamp. shall be.

In the example shown in the drawing, there are three gripping rods provided on the movable clamp 3, but there are at least two gripping rods with different distances from the gripping rod 9 of the fixed clamp 2. All you have to do is set it up. In addition, in the example shown in the drawings, the gripping rod 9 and the gripping rod 10,
11 and 12 are provided on both sides of the clamps 2 and 3, but they may be provided on only one side. However, it is more convenient to have them on both sides because you can use both hands to operate them, and you can pull the socket against the tube (and vice versa) with a more uniform force.

[Effect of invention]

In the drawing, the socket is held between clamps 3,
Further, the insertion length of the tube into the socket is determined in accordance with the dimensions of the socket, and the tube is held between the clamps 2. Then, the outer surface of the end of the tube and the inner surface of the socket opening are heated and melted by the heater 17. Next, remove the heater 17, hook your thumb on the gripping rod 9 of the clamp 2 that clamps the tube, and hook your remaining fingers on any of the gripping rods 10, 11, and 12 of the clamp 3 that clamps the socket to clamp the socket. Clamp 3
to the clamp 2 side that holds the tube. Then, a constant pressing force is maintained for a predetermined period of time to wait for cooling and fixation. Once the pipe and socket are completely joined, remove the joined pipe and socket from the fusion machine.

[Effect of idea]

Depending on the insertion length of the pipe into the socket, the gripping rods 10, 1 of the clamp 3 on the moving side that clamps the socket
Select either one of 1 or 12, and if the insertion length of the tube into the socket is the shortest, select gripping rod 12.
If the length is longer than that, put your fingers on the gripping rod 11, or if it is the longest, put your fingers on the gripping rod 10 and pull the clamp 3 that holds the socket toward the clamp 2 that holds the tube, thereby determining the insertion length of the tube into the socket. can be defined, and the tube and socket can be fused and joined at the required insertion length. Furthermore, since the tube and socket are held by the ring-shaped clamp, deformation of the tube and socket during fusion can be prevented and a perfect circle can be maintained.

〔Example〕 Embodiments of the present invention will be described below with reference to the drawings.

In the figure, 2 is a clamp that clamps a polyethylene pipe as a city gas conduit, and 3 is a clamp that clamps a polyethylene socket.
3 has two split rings 4a, 4b, one of which is fixed, the other 4b is pivotally connected to it by a link 5, and one of the two split rings 4a, 4b of the clamp 2 , the socket is sandwiched between one of the two halves of the ring 4a and 4b of the other clamp 3, and the other half of the ring 4b is engaged with the female threaded pipe 6 connected to one of the two halves of the ring 4a. By screwing together the male screw 7 with a handle, the pipe and socket are pressed and held.

In the illustrated example, the clamp 2 that clamps the tube is fixed, and the clamp 3 that clamps the socket is provided with a slide bearing 8 at the bottom, and the clamp is fixed along the shafts 16, 16 provided on the base 1. Slide towards 2.

A gripping rod is provided for moving and pressing the movable clamp 3 that clamps the socket toward the fixed clamp 2 that clamps the tube. That is, the clamp 2 on the fixed side that clamps the pipe is provided with a gripping rod 9 that protrudes laterally, and the clamp 3 on the movable side that clamps the socket is provided with a gripping rod 9 that protrudes laterally and is connected to each other. Three gripping rods 10, 11, 12 whose connected lines have an L-shape are rotatably connected at the central gripping rod 10. The gripping rod 9 and the gripping rods 10, 11, 12 are normally provided on both sides of each clamp 2, 3. Further, the movable clamp 3 that clamps the socket is provided with a lock knob 13 for fixing it. This lock knob 13 fixes the clamp 3 when the inner surface of the insertion opening of the socket is heated with a heater.

As mentioned above, the gripping rods provided on the movable clamp 3 are connected to the three gripping rods 10, 11, and 12, which are interconnected and have an L-shaped connecting line, at the central gripping rod 10. By connecting the fixed clamp 2 so as to be rotatable, the distance from the fixed clamp 2 to the gripping rod 9 can be changed so that the gripping rod 10 is the furthest away, then the gripping rod 11 is rotated, and the distance from the gripping rod 9 is different from that of the gripping rod 12. can do. In the illustrated example, there are three gripping rods provided on the movable clamp 3, but it may be two, for example, the gripping rod 10 and the gripping rod 11, and up to the gripping rod 9 of the fixed clamp 2. The movable clamp 3 may be provided with at least two gripping rods having different distances from each other.

In addition, what is indicated by 17 as a whole is a heater because it heats and melts the outer surface of the end of the tube and the inner surface of the insertion opening of the socket, and the heater 17 engages with the heater receiver 15 provided at the top of each clamp 2, 3. It is connected to a heater bracket 18 in which a long groove is formed and can be moved toward each clamp 2,3. 19 is a heater centering adjustment knob.

Next, a procedure for fusion-splicing a polyethylene pipe as a city gas conduit and a polyethylene socket using the above-mentioned fusion splicer will be described.

Loosen the male screw 7 of the clamp 3 that clamps the socket, insert the socket into the split rings 4a and 4b, tighten the male screw 7, and clamp the socket with the clamp 3. Also, the male thread 7 of the clamp 2 that clamps the pipe
Loosen the screws, determine the insertion length of the tube into the socket according to the dimensions of the socket, and divide the tube into two rings 4a and 4b.
, tighten the male screw 7, and clamp the tube with the clamp 2. Then, the outer surface of the end of the tube and the inner surface of the socket opening are heated and melted by the heater 17. Next, remove the heater 17, put your thumb on the gripping rod 9 provided on the clamp 2 that held the tube, and insert your remaining fingers into one of the gripping rods provided on the clamp 3 that held the socket, and insert the tube into the socket. If the length is relatively long, hang it on the gripping rod 11 and pull the clamp 3 holding the socket towards the clamp 2 holding the tube. At this time, use both hands to grasp the gripping rods 9, 9 and 11, 11 on both sides of the clamps 2 and 3, and pull them together with uniform force.
Then, a constant pressing force is maintained for a predetermined period of time to wait for cooling and fixation. When the pipe and socket are completely joined, the male screw 7 is loosened and the joined pipe and socket are removed from the fusion machine.

If the insertion length of the tube into the socket is short, the gripping rods 11 and 12 are rotated 90 degrees, the fingers are placed on the gripping rod 12, and the aforementioned operation is performed to fuse and join the tube and the socket.

Furthermore, if the insertion length of the tube into the socket is long, the gripping rod 10 is hooked with one's fingers to fuse and join the tube and the socket.

In either case, when clamping the pipe between the clamps 2, the insertion length of the pipe into the socket is determined, and the clamp 3 is moved and pressed against the clamp 2 until the clamp 2 comes into contact with the end face of the socket. This precisely defines the length of insertion of the tube into the socket.

Also, the tube and socket are connected by a link-shaped clamp 2.
Since it is held between the clamps 3, no deformation occurs during fusion and the perfect circle is maintained.

Although the above explanation has been about fusion bonding of polyethylene pipes and polyethylene sockets as city gas conduits, other synthetic resin pipes and synthetic resin sockets may be fusion bonded for other purposes, such as water supply conduits. Of course, the present invention can also be implemented in other cases.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the fusion splicer according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof. 2... Clamp on the immovable side that holds the pipe, 3...
Movable side clamp that clamps the socket, 4a, 4
b...Split ring, 9...Gripping rod of immovable side clamp, 10, 11, 12...Gripping rod of movable side clamp, 17...Heater.

Claims (1)

[Scope of utility model registration request] The outer surface of the end of the synthetic resin tube and the inner surface of the socket of the synthetic resin socket are heated and melted, the molten tube and socket are engaged and pressed, and after cooling and solidifying, the tube and socket are fused and joined. In such a fusion splicer, a clamp consisting of a two-split ring that holds the pipe and a clamp that consists of a two-split ring that holds the socket are provided, one of these clamps is fixed, and the other clamp is fixed. one of the fixed clamp and the movable clamp is provided with one gripping rod that projects laterally, and the other clamp is provided with one gripping rod that respectively projects laterally; A socket fusion machine characterized in that at least two gripping rods are provided with different distances to the gripping rod of the one clamp.