| 摘要 |
PROBLEM TO BE SOLVED: To obtain a spring constant always correctly corresponding to operation exciting frequency even in a device in which operation rotating speed, i.e., exciting frequency changes, by providing a device to control current carrying and interception of control current to shape memory alloy based on the signal of operation condition such as rotating speed of the device. SOLUTION: A control device 4 carries or intercepts current to a plurality of shape memory alloys 2a, 2b on the upper side and the lower side through flanges 5a, 5b, 5c, and control of current carrying and interception is performed according to rotating speed of this vibrationproof supporting device 03. When the shape memory alloys 2a, 2b are current-carried, they are contracted to contact stoppers with the flanges 5a, 5c. When current carry to the shape memory alloys 2a, 2b is intercepted, they are extended, and both vibrationproof rubbers 1a, 1b peform vibrationproof action. Hereby, even when the operation rotating speed of the device, i.e., the exciting frequncy is changed, the spring constant of vibrationproof rubber well-adapted to this can be easily selected only by changing the current carrying conditions to the shape memory alloys.
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