| 摘要 |
PROBLEM TO BE SOLVED: To remarkably reduce the risk that a rockable body is unexpectedly tilted by the weight thereof to damage a workpiece. SOLUTION: A spherical section 35 of a support body 30 is housed in a spherical bearing section 28a of a body 20, and the body 20 is rockably supported by the support body 30. In the body 20, there are provided an O-ring 29 making contact with the spherical section 35, and also a closed space K1 sealed by the O-ring 29. Further, through a pressurizing port 41 and an inner pressure adjusting path 42, pressurized air is supplied to the closed space K1. When the support body 30 is in a fixed state, if the pressure in the closed space K1 is increased by supply of the pressurized air, the increase in the inner pressure lifts up the body 20 relative to the support body 30. This increases frictional resistance at a part A to suppress a tilt of the body 20 due to the weight thereof. COPYRIGHT: (C)2010,JPO&INPIT |
