| 摘要 |
PROBLEM TO BE SOLVED: To compose a control valve device of a chip conveying route at a low cost and in a compact size. SOLUTION: In a lathe having a chip conveyer device, an on-off valve device 110 is provided at the connection part of an auxiliary suction passage to a main suction passage, and the system is switched to the condition communicating the auxiliary suction passage to a suction device and the condition to cut off them. The on-off valve device 110 has a ball valve 240 and an oscillation cylinder 242, and the rotation of the rotor of the oscillation cylinder 242 is transmitted to the ball valve 240 by a coupling member 270. Inside the valve housing 250 of the ball valve 240, a spherical valve chest, and two ports to connect the valve chest to the main suction passage and the auxiliary suction passage respectively are formed, and a spherical valve element 252 is provided rotatable in the valve chest. The valve element 252 is rotated by rotating the rotor of the oscillation cylinder 242, and the system is switched to the condition to communicate two ports and the condition to cut off them. The rotation of the rotor is controlled depending on the detection of a detected part 290 by proximity switches 300 and 302.
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