| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positioning device which can reliably perform a retracting action of a vertical axis under a brake working condition without having to rely on external power and without having to add a new control circuit. <P>SOLUTION: The positioning device is structured such that a movable part 21 moves in a vertical direction upward and downward with respect to a fixed part 20. A pressure regulating device 46 is connected to an air supply (compressor) 44. Compressed air from the air supply 44 is supplied to the pressure regulating device 46 via air piping 60. The compressed air supplied to the pressure regulating device 46 is supplied to an air balance via piping 70 of the air balance. An electric signal that instructs pressure regulation is input from a controller 40 to the pressure regulating device 46 via a pressure regulation signal line 80 and controls operations of the pressure regulating device 46. An emergency stop switch 42 is a switch for manually initiating an emergency shutdown. When the emergency stop switch 42 is pressed, control by the controller 40 is suspended and an emergency stop state is entered. <P>COPYRIGHT: (C)2013,JPO&INPIT |
