| 摘要 |
PROBLEM TO BE SOLVED: To provide a no-blow bag for gas fitting work which has pressure resistance and durability suitable, even for high gas pressure and a structure for allowing only small gas leakage. SOLUTION: The no-blow bag for gas fitting work comprises a flexible and gas-tight hollow bag body 1, through which a worker can see the inside to be used as a working space. A fixing hole 6 opened in one surface of the bag body 1 is attached gas-tightly to a working part 5 in an object of a gas fitting work. The worker inserts his hand into the bag body 1 in a gas-tight manner from an insertion hole 7, opened in the other surface to carry out necessary gas fitting work in the bag body 1 while making gas flow in the working space. The one surface and the other surface of the bag body 1, having the fixing hole 6 and the insertion hole 7, are composed of rubber sheets 2a, 3a. One of or both of the fixing hole 6 and the insertion hole 7 opened in the rubber sheets 2a, 3a are formed, so as to be sleeve shape cylindrical body 6a, 7a having the required length. Further, the rubber sheets 2a, 3a forming the one surface and the other surface of the bag body 1 having the fixing hole 6 and the insertion hole 7 are formed, so as to have a double structure and the sleeve shape cylindrical body 6a, 7a forming the fixing hole 6 and the insertion hole 7 opened in the rubber sheets 2a, 3a are also formed to form a double structure.
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