| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic valve with a new manual closing mechanism which can save a space and reduce the cost by unifying the air operation valve with the manual closing mechanism. SOLUTION: In this pneumatic valve for moving a cylinder piston 33 forward and backward with pneumatic operation to operate a valve element 40 integrally formed with the piston, an operating member 51 is arranged in rear of the cylinder piston through a spring member 52, and a manual operation lever 56 having a cam part 57 at a tip thereof and the described operating member are connected to each other to move the operating member forward and backward with turning of the operation lever. When moving the operating member forward, the piston is forcedly moved forward to make the valve element 40 abut on a valve seat 16 to close the valve. COPYRIGHT: (C)2004,JPO
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