| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly safe valve device comprising a cylindrical body, a valve element for opening/closing a channel inside the cylindrical body and an operation part for operating the valve element to be opened/closed, capable of preventing the valve element from being unintentionally opened. SOLUTION: The valve elements 20 and 30 are screwed with the inside of the cylindrical bodies 13 and 14, and channels are opened/closed according to the forward/backward movement of the valve elements inside the cylindrical bodies as the valve elements are screwed. The operation part consists of operation cylinder parts 21 and 31, which are detachably and rotatably attached to open ends of the cylindrical bodies 13 and 14 respectively. The valve elements 20 and 30 can be connected to the operation cylinder parts 21 and 31 in such a way that the relative rotation is prevented. COPYRIGHT: (C)2004,JPO
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