| 摘要 |
PURPOSE:To provide the compact construction of the device by providing working medium supply piping disposed in tight contact with a wrist sleeve pipe so as to feed a gas and cooling liquid pair from annular gas chambers and annular liquid chambers toward the front side, etc., of the wrist. CONSTITUTION:Plural sealing means 70, 72, 74, 76, 78 are held by an annular holding means 46 to the wrist sleeve pipe 42. The plural annular chambers 84, 86, 88, 90 are disposed between the adjacent sealing means 70, 72, etc. These annular chambers communicate as the annular gas chambers and the annular liquid chambers with both chambers. The working medium supply piping means 22 disposed in tight contact with the wrist sleeve pipe 42 are so disposed as to feed the assist gas and cooling liquid from the working medium supply piping means and the annular gas chambers and the annular liquid chambers to the front side of the wrist 18 or a laser emission device in order to supply the gaseous working medium or liquid working medium. The leakage of the cooling liquid and assist gas in the wrist part is prevented in this way. |
