| 摘要 |
PURPOSE: A manhole joint structure of a spiral wiring pipe is provided to prevent the separation of a spiral wiring pipe from a manhole and to prevent an electric leakage in a wire or a cable by underground water. CONSTITUTION: The manhole joint structure of a spiral wiring pipe contains a connection passage(12) formed on a wall(11) of a manhole(10) to fit a spiral wiring pipe(20), inner and outer fixing sockets(30,40) formed to screw down the end of the spiral wiring pipe(20), and a flexible sealing member(50) located between the inner and outer fixing sockets(30,40). The spiral wiring pipe(20) is connected tightly to the manhole(10) by facing the flexible sealing member(50) on the outer side of a connection passage of the manhole(10) to be tightened closely by fastening the inner and outer fixing sockets(30,40) coupled to the end of the spiral wiring pipe(20).
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