Coupling-equipped pipe and apparatus for manufacturing the same
First Claim
1. A coupling-equipped pipe which is made of a synthetic resin, and which is formed by inserting, into one end of a pipe main body which is formed in a spiral shape in which projecting parts and recessed parts are alternately positioned in the direction of the pipe axis, a tubular socket made of metal which has an external diameter that is larger than the internal diameter of said pipe main body, and by further inserting, into the other end of said pipe main body, a tubular spigot made of metal which has an external diameter that is larger than the internal diameter of said pipe main body, and which also has a tip-end insertion part that can be inserted into said socket and connected therewith.
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Accused Products
Abstract
The present invention relates to provide a coupling-equipped pipe which prevents cost increasing, and which also enables to perform connection work quickly and easily, and enables to stop water leakage in a secure manner. A coupling-equipped pipe 4 is constructed by inserting, into one end of a pipe main body 1 made of a synthetic resin and formed in a spiral shape wherein projecting parts 1A and recessed parts 1B are alternately positioned in the axial direction of the pipe, a tubular metal socket 2 having an external diameter larger than the internal diameter of the pipe main body, and inserting into the other end of the pipe main body 1, a tubular metal spigot 3 having an external diameter larger than the internal diameter of the pipe main body 1, and which has a tip end insertion part 3X capable being inserted into the socket 2 and connected therewith.
23 Citations
14 Claims
- 1. A coupling-equipped pipe which is made of a synthetic resin, and which is formed by inserting, into one end of a pipe main body which is formed in a spiral shape in which projecting parts and recessed parts are alternately positioned in the direction of the pipe axis, a tubular socket made of metal which has an external diameter that is larger than the internal diameter of said pipe main body, and by further inserting, into the other end of said pipe main body, a tubular spigot made of metal which has an external diameter that is larger than the internal diameter of said pipe main body, and which also has a tip-end insertion part that can be inserted into said socket and connected therewith.
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2. A coupling-equipped pipe which is made of a synthetic resin, and which is formed by inserting, into one end of a pipe main body which is formed in a spiral shape in which projecting parts and recessed parts are alternately positioned in the direction of the pipe axis, a tubular socket made of metal which has an external diameter that is smaller than the internal diameter of said pipe main body, then expanding the diameter of at least a portion of said socket, and by further inserting, into the other end of said pipe main body, a tubular spigot made of metal which has an external diameter that is smaller than the internal diameter of said pipe main body, and which also has a tip-end insertion part that can be inserted into said socket and connected therewith, then expanding the diameter of at least a portion of said spigot.
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14. An apparatus for manufacturing a coupling-equipped pipe, comprising:
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a rotatable rotating stand capable of carrying a pipe main body which is made of a synthetic resin, and which is formed in a spiral shape in which projecting parts and recessed parts are alternately positioned in the axial direction of the pipe;
insertion means for inserting a tubular socket or spigot which is made of a metal and has a sealing material consisting of a synthetic resin that can be thermally fused to a metal inside a recessed part that is recessed inward in the direction of diameter of the pipe, said insertion means being provided at one of the two ends of the pipe main body with respect to the axial direction of the pipe carried on said rotating stand; and
heating coil insertion means provided at the other end of the pipe main body for inserting a heating coil that constitutes a high-frequency heating device into said pipe main body;
wherein the apparatus further comprises;
direction changing means which rotate said rotating stand after the socket or spigot has been inserted into said pipe main body by said insertion means so that said pipe main body is caused to undergo a change in direction of approximately 180 degrees; and
thermal fusion means for causing thermal fusion of said sealing material after said heating coil has been inserted into said socket or spigot following the change in direction of said pipe main body.
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Specification