| 摘要 |
PCT No. PCT/JP92/00093 Sec. 371 Date Sep. 30, 1992 Sec. 102(e) Date Sep. 30, 1992 PCT Filed Jan. 30, 1992 PCT Pub. No. WO92/13669 PCT Pub. Date Aug. 20, 1992.A piping arrangement in which a plurality of sealing means (70 through 78) are arranged on a sheathing pipe (42) provided as an outer pipe of a robot wrist (18) of a laser robot to thereby define annular chambers (84 through 90); the annular chamber (86 and 90) being used as a gas-carrying annular chamber for transferring an assist gas from one line to another, and a liquid-carrying chamber for transferring a liquid coolant from one line to another; the assist gas and the liquid coolant being supplied and returned through the gas-carrying annular chamber and the liquid-carrying annular chamber (84 and 90). Pipes (22, 24, 26, and 28) are arranged close to and along the outer surfaces of a robot forearm (16) and the robot wrist (18), and predetermined annular chambers (84, 88) other than the gas-carrying annular chamber (86) and the liquid-carrying annular chamber (90) being used as pressure chambers provided with sealing means (70 through 78) arranged thereamong, to thereby prevent leakage of the assist gas from the gas-carrying annular chamber and leakage of the liquid coolant from the liquid-carrying annular chamber.
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