| 摘要 |
PROBLEM TO BE SOLVED: To provide a no-blow bag for gas fitting work which has high pressure resistance and durability suitable for even 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 a lower bottom 2 of the bag body 1 is gas-tightly attached 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 an upper bottom 3 to carry out necessary work in the bag body 1, while making gas flow in the working space. An material for forming the bag body 1 is woven of a fiber having the necessary strength and elongation and a transparent flexible synthetic resin sheet material for forming a lattice pattern. The bag body is formed with the composite fiber sheet material 1a formed of the sheet material and the fiber. Further, rubber sheets 2a, 3a, which serve also as reinforcement, are adhered to the lower bottom 2 and the upper bottom 3 so as to form a double structure.
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