| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a coupling to be easily mounted. SOLUTION: The coupling 1 connects a hand hole and a pipe. The coupling 1 comprises: a cylindrical inserted part 2 inserted into a hole on a peripheral wall of the hand hole H; a flange 3 provided at outer end of the cylindrical inserted part 2 and abutting on an outer peripheral surface of the hand hole H; and a cylindrical protrusion 4 continuously provided at the flange 3. A cylindrical shape holding member 5 for maintaining the shape of the inserted part 2 after inserted is buried in the inserted part 2. The cylindrical shape holding member 5 comprises a pressure applying part 5a for applying an inserting force for inserting the inserted part 2 into the hole in the hand hole H.</p> |
