| 摘要 |
A valve opening/closing apparatus using a shape memory alloy is provided to open and close a valve for interrupting or passing a gas or a liquid by using the contraction force of the shape memory alloy. In a valve opening/closing apparatus using a shape memory alloy, a rotation member(4) rotating by a contraction force of a shape memory alloy wire(14) is provided on the upper side of a stem(3) ascending or descending to open and close a valve. A winding portion(7) formed by winding the shape memory alloy wire is provided on the outer peripheral surface of the rotation member having a semi-circular outer peripheral surface. A resilient bending guide is fixed between two rotational members.
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