| 摘要 |
PURPOSE:To facilitate restoration of pin coupling by connecting a spring formed by a shape memory alloy having the property of being shrunk by heating to a pin, and disposing members turning on electricity on the spring. CONSTITUTION:The first pin groove 11 is formed on a coupling 7, and a spring 12 formed by a shape memory alloy is inserted in the pin groove 11. Lead wires 13 are connected to the spring 12, and a pine 14 is coupled to the forward end of the spring 12. In this arrangement, elecricity applied to the lead wires 13 is controlled to engage and disengage the pin 14, so that as it is not necessary to cut the pin 14, the coupling of the pin 14 is easily restored. |
