| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bag introducing duct and passage blocking method wherein work can be carried out even in a narrow work space, and work time is shortened without receiving spatial limitations. <P>SOLUTION: A curving part 2 to be curved so that bags can be introduced into a gas main A interior from an optional direction is provided on a duct body 1. The curving part 2 is curved into a predetermined shape, and the duct body 1 is connected to a gas main A by a connecting part 3. A bag introducing guide pipe 5 and the bags B1 and B2 housed in its interior are inserted from a duct body 1 interior into the gas main A interior, a tube T is forced in, the bags B1 and B2 are introduced from the bag introducing guide pipe 5 interior to a passage blocking position X, gas is sent in from the tube T, the bags B1 and B2 are inflated, and communication of gas of the gas main A interior is blocked. <P>COPYRIGHT: (C)2003,JPO |
