| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas filling coupling support arm in which spring force of a balance mechanism can be acted regardless of a turning angle of an arm. SOLUTION: A parallel link mechanism 30 is provided on the rear face side of a first arm 18 in the gas filling coupling support arm 10. A first balance mechanism 32 to make the first arm 18 to stand still and a second balance mechanism 34 to make a second arm 22 to stand still are provided to the parallel link mechanism 30. The spring force by a first spring member 48 is imparted to a first wire 46 since the first spring member 48 is pulled corresponding to the turning angle of the first arm 18 in the first balance mechanism 32. While, the spring force of a second spring member 54 is imparted to a second wire 52 corresponding to the turning angle of the second arm 22 in the second balance mechanism 34. By this, the first arm 18 and the second arm 22 are made to stand still by being balanced with the spring force of the first spring member 48 and the second spring member 54. COPYRIGHT: (C)2004,JPO
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