| 摘要 |
PROBLEM TO BE SOLVED: To enhance the pressure-proof strength of a feed passage to feed high-pressure gas. SOLUTION: A gas filling coupling support arm 10 comprises a first joint 14 supported by a fixed part 12, a second joint 16 supported by the first joint 14, a first arm 18 supported by the second joint 16, a third joint 20 coupled with a tip of the first arm 18, a second arm 22 supported by the third joint 20, a fourth joint 24 coupled with a tip of the second arm 22, a fifth joint 26 supported by the fourth joint 24, and a gas filling coupling 28 supported by the fifth joint 26. The first arm 18 and the second arm 22 are formed of a thick-walled metal pipe with the pressure-proof strength according to the pressure of high-pressure gas. In the gas filling coupling support arm 10, the first arm 18 and the second arm 22 are not expanded internally from the gas pressure, and a gas filling coupling 28 is freely moved by a relatively small operating force. COPYRIGHT: (C)2004,JPO
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