| 摘要 |
PURPOSE:To enable a movable body to be fixed or minutely moved by connecting a pressure source to orifices formed on both longitudinal and lateral guide faces of bearing guides and the opposite faces of both bearing pads via independent introducing ports, in a precision machine tool, etc. CONSTITUTION:In order to move and guide a movable body 3, a pressure fluid is jetted out through the orifices 43 to 47 of bearing pads 41, 42, and bearing gaps A to J are created between both pads and between both pads and longitudinal and lateral bearing guide faces 21 to 23, to make both pads non-contact with bearing guides 2, 2a. When fixing the movable body 3 to a stopping position, the pressure of the bearing gaps C, F is set zero while a certain pressure is applied to the gaps B, E, to press the pads 41 against the guide faces 22. When minutely moving the movable body 3, the pressure of the gaps A, D is made zero, and the pressure of the gaps B, E or C, F is raised while the pressure of C, F or B, E is reduced, causing the body 3 to move minutely rightword or leftward. Minute movement in the vertical direction is carried out by adjusting the pressure of the gaps G to J, and one in feeding and rotting directions can also be performed in a similar manner. |
