| 摘要 |
PROBLEM TO BE SOLVED: To provide a preferable opening structure with air-tightness applicable to a pressure chamber, and a pressure chamber comprising the opening structure. SOLUTION: The structure is disposed in part of sheets 2, 12 and 13 separated with the pressure difference, and is the opening structure with air-tightness for opening/closing an opening with zippers 12F and 13F. An auxiliary sheet 14 is disposed on the sheet 12 in such a way that the auxiliary sheet can overlap the opening and the zipper 12F when the zipper 12F is closed, and an annular continuous seal member 15 is attached to the sheet 12. The seal member 15 can seal the periphery of the opening and the zipper 12F by closely adhering to a face of the auxiliary sheet 14 on the opposite side. COPYRIGHT: (C)2006,JPO&NCIPI
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