| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag for a water cutoff device having an improved strength by preventing a crimp portion formed by means of a caulking ring of an interior bag from being damaged.SOLUTION: A freely expansible and contractible interior bag 4 is packed by an exterior bag 5 for expansion regulation and protection of the interior bag, and a cylindrical ferrule 2 which allows a top end opening part 3a of a hose 3 to be inserted and fitted, has a large number of notches 2a circumferentially disposed on an outer circumferential surface thereof and has rigidity is protrusively disposed on one end of the interior bag 4. The ferrule 2 is externally fitted and crimped with a caulking ring 6 via a lip 5a of the exterior bag 5 which surrounds the ferrule 2, therefore, the notches of the ferrule 2 are bit into the lip 5a of the exterior bag 5, and the lip of the bag and the notches of the ferrule can be integrated so as not to fall off. Moreover, the interior bag 4 body of a rubbery part is not damaged by external fitting and crimping of the caulking ring 6 and, therefore, the strength of the bag 1 for a water cutoff device can be improved. |
