Patent ID: 7149419

Claim:
A position control device, comprising: a first movable member; a second movable member for moving among a first region in which the first movable member is locked in a first predetermined position, a second region in which the lock state of the first movable member is released, and a third region which is as a transfer region between the first region and the second region; a first detector for outputting a position signal corresponding to whether or not the first movable member is located in the first predetermined position; a second detector for outputting a first signal in a state where the second movable member is located in one of the first region and the second region, and for outputting a second signal in a state where the second movable member is located in the third region; and a controller for controlling an actuator for driving the second movable member, wherein the controller discriminates the region in which the second movable member is located based on the position signal, the first signal and the second signal, when the discrimination result shows that the second movable member is located in the first region, controls the actuator in a first mode to move the second movable member to a second predetermined position set in the first region, and when the discrimination result shows that the second movable member is located in one of the second region and the third region, controls the actuator in a second mode to move the second movable member to the second predetermined position.