| 摘要 |
PROBLEM TO BE SOLVED: To dissolve a problem that a conventional winding pipe is heavy and apt to be permanently deformed since it is made by steel and the problem of expansion, contraction, due condensation and rust, etc. SOLUTION: Plural pipe mainbodies 12 are connected with joints 14 and are provided with light and elastic structure where the inner and outer peripheries of a holloe pipe made by a fiber reinforcing thermosetting resin are coated by thermoplastic resin layers. The joints 14 consists of an elastic resin formation body and are provided with a flange part 14a being equal to the outer diameter of the pipe mainbodies 12, a pair of arm parts 14 which are integrated in the left and right part of the flange part 14a and are provided with the diameter being almost the same as the inner diameter of the pipe mainbodies 12 and a steel bar 16 which penetrates the center of the arm parts 14 in a longitudinal direction so as to be integratedly inserted. |
