| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily take out branch, suppressing excavation of the ground to a minimum by providing a collar part on an upper part of a pipe inserting part to be inserted into a pipe to take out branch, forming a surface on the pipe inserting part side of the collar part into a flat surface and fusing branch into the pipe to take out branch. SOLUTION: In a fusion pipe coupling 1 for taking out branch, a pipe inserting part 11 is inserted into an open hole 21 opened on a synthetic resin main branch pipe 2. The pipe coupling 1 has a collar part 12 on an upper part of the pipe inserting part 11, and the pipe inserting part 11, the collar part 12 and a branch pipe part 13 are integrally formed by synthetic resin. The collar part 12 has a flat surface 121 on the pipe inserting part 11 side and a flat surface 23 is provided on an outer periphery of the upper part of the open hole 21. When the pipe inserting part 11 is inserted into the open hole 21, the flat surface 121 is abutted on the flat surface 23. By supplying fusion current from lead wire 16 extended up to the ground to heating wire 15 in this abutting state, the pipe inserting part 11 and the flat surface 121 are molten and expanded, and an open hole wall of the main branch pipe 1 and the flat Surface 23 are fused.</p> |
