| 摘要 |
PCT No. PCT/JP94/02171 Sec. 371 Date Nov. 2, 1995 Sec. 102(e) Date Nov. 2, 1995 PCT Filed Dec. 21, 1994 PCT Pub. No. WO95/29038 PCT Pub. Date Nov. 2, 1995A spindle device in which a coolant passage 26, capable of being selectively connected to a main passage 17, is provided at downstream of the main passage 17, an air passage 32, capable of being selectively connected to the main passage 17, is provided externally of the coolant passage 26, a first open-close means 20 is provided between the main passage 17 and the coolant passage 26, and a second open-close means 30 is provided between the main passage 17 and the air passage 32, whereby when the tool is clamped, the first open-close means 20 is opened to connect the main passage 17 with the coolant passage 26 and the second open-close means 30 is closed to cut-off the connection between the main passage 17 and the air passage 32 whereas when the tool is unclamped, the first open-close means 20 is closed to intercept the connection between the main passage 17 and the coolant passage 26 and the second open-close means 30 is opened to connect the main passage 17 with the air passage 32.
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