| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage joint of which the entire configuration can be changed, which can adopt various materials, and can limit the generation of wood wastes at the time of construction. SOLUTION: A drainage joint 10 for connecting an upper cylinder which comprises a part of the rainwater drainage structure that extends in a vertical direction along the structural object and a lower cylinder 3 placed below the upper cylinder is provided with several joint cylindrical members 11 of identical shapes positioned to reach the lower cylinder from the upper cylinder, each of which is connected with the adjacent member. The joint cylindrical members are formed in such a way that the diameter of an upper end 12 is larger than that of a lower end 13 and a lower end of the upper joint cylindrical member located immediately above is fitted into the upper end in an inserted state with a gap A and a catching section 17 engaged with a caught section 15 provided on the inner periphery surface of the upper end when the lower end is inserted into the upper end of other joint cylindrical members is formed on the outer periphery surface of the lower end. COPYRIGHT: (C)2011,JPO&INPIT
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