| 摘要 |
PROBLEM TO BE SOLVED: To obtain a sprinkler winding pipe connection structure which provides excellent construction property and water-tightness after construction, prevents electric contact, and reduces a cost, and to provide a sprinkler winding pipe. SOLUTION: When the sprinkler winding pipe 3 is connected, an insulation member 22 is externally fitted to the end part of a pipe body 3a and a joint member 24 screw-fitted onto an opposite piping member 7 is assembled so as to be freely rotatable in a circumferential direction via an O-ring 23 of water-swelling rubber. In the case of piping, even when the pipe body 3a is fixed, the piping is performed by screwing, while rotating the joint member 24 in a circumferential direction. After the piping, the joint member 24 is attached by pressure by the water-swelling of the O-ring 23 so as to automatically stop rotating. Then water-tightness and electric contact prevention are secured in the joint member 24. COPYRIGHT: (C)2006,JPO&NCIPI
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