| 摘要 |
PROBLEM TO BE SOLVED: To devise a bolt-and-nut tightening structure to improve the connection between fluid devices made of relatively soft material such as synthetic resin, so that a decrease in tightening torque due to loosening, backlashes and creeping is avoided to maintain an effective sealed state over a long period. SOLUTION: In this connection structure, a bolt 66 for passing through a manifold 1 and a valve 2, a nut 67, and a helical spring 68 for intervening between the manifold 1 and the nut 67 are provided to put the first fluid inlet/outlet port part 1A of the manifold 1 and the second fluid inlet/outlet port part 2A of the valve 2 in communication via a gasket G. As the helical spring 68 is compressed a predetermined amount by the tightening together of the bolt 66 and the nut 67, a connected state in which the first fluid inlet/outlet port part 1A and the second fluid inlet/outlet port part 2A are in communication via the gasket G can be maintained. COPYRIGHT: (C)2008,JPO&INPIT
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