| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal jig capable of completely and tightly closing a prescribed position of a pipe by being detachably inserted in the pipe. SOLUTION: In the seal jig closing the pipe inside by a seal bag inserted in the pipe in a contracted state by the load of an internal pressure, a skirt 10C formed of an elastic material is externally fitted around the outer circumferential face of the seal bag 10A and, when the seal bag 10A is inflated by the expansion of the seal bag 10A, the skirt is expanded diametrically outward with the inflation of the seal bag 10A so as to be pressedly sandwiched in a space toward the internal circumferential face of the pipe P. |
