| 摘要 |
<p>PROBLEM TO BE SOLVED: To integrate restoring function applicable to plural sizes of elastic pipes. SOLUTION: Restoring parts 3b, 3c for fitting both pressure portions 1, 2 to be fitted to a maximum bore size elastic pipe Pa with elastic pipes Pb, Pc having a smaller bore size than the maximum bore size elastic pipe Pa, respectively, are superposed on each other and mounted in a detachable manner so that both pressure portions 1, 2 and the restoring parts 3b, 3c can be integrated and carried. The superposed restoring parts 3b, 3c, if removed at a working site as required, correspond to the size of the elastic pipe P. In this state, with both pressure portions 1, 2 moved close to each other, a flat crushed portion P1 is pressurized transversely to the direction of crushing and restored in a circular shape.</p> |
