BAG FOR BLOCKING DEVICE

WIPO Patent Application WO/2021/193684

A1

The present invention prevents damage to an internal bag in an insertion path into a water pipe. An inflatable internal bag (2) is enclosed by an external bag (3). A vent (2a) of the internal bag (2) into which a cap (4) is inserted and attached and a hose (5) connected to the cap (4) are externally fitted and crimped by a caulking ring (6) via a mouth (3a) of the external bag (3). The cap (4) has a cylindrical barrel (4a) inserted and fitted into the vent (2a). An outward opening (4d) of the barrel (4a) is provided so as to project outward from the vent (2a), and is inserted and fitted into a tip-end opening (5a) of the hose (5). A rope (10) with a smaller diameter than the outward opening (4d) is passed through the hose (5), the rope (10) having, at a base end thereof, a stopper (9) that can be engaged with an end surface of a base end opening (5b). The rope (10) has, at a tip-end thereof, a stopper (11) with a diameter slightly smaller than the inside diameter of the barrel (4a). The stopper (11) is placed in the barrel (4a) so that a front surface of the stopper (11) becomes substantially flush with an inward opening end surface (4c) of the barrel (4a) by adjusting the length of the rope (10) when the internal bag (2) is in a deflated state.

JP6522965	Fluid blocking bag and fluid blocking device
WO/1995/011369	FRICTION PLUG FOR A HIGH PRESSURE PIPE

INOUE TOMOHIRO (JP)

PCT/JP2021/012121

September 30, 2021

March 24, 2021

Click for automatic bibliography generation  

KURODITE IND CO LTD (JP)

F16L55/128; F16L55/134

JP2017082878A	2017-05-18
JP2014020498A	2014-02-03
JP2001241590A	2001-09-07

SHIMIZU Takamitsu (JP)

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