| 摘要 |
PROBLEM TO BE SOLVED: To reduce damage when excessive force acts on an arm. SOLUTION: This gas-filled coupling support arm reaches a passage opening position when a spool 38 moves in the Xb direction when a releasing wire 28 is pulled when an opening angle of a first arm 18 and a second arm 22 becomes 180 degrees. Thus, In a releasing mechanism 36, a first passage 42 and a second passage 44 are communicated via a pressure switching chamber 40, and a second passage 46 and a through-hole 48a of a cap 48 are cut off. Thus, high pressure gas is introduced into an end part of a shaft hole 32c via the first passage 42, the pressure switching chamber 40 and the second passage 44 from an annular groove 32d. When Y directional force acts on a joint structure 30 for trying to separate a first joint 32 and a second joint 34, a projection 54b fitted to and engaged with a locking groove 58 of a shaft part 34b is cut off, and locking on the second joint 34 is released. Afterwards, the first joint 32 and the second joint 34 are separated by gas pressure. COPYRIGHT: (C)2004,JPO
|
