| 摘要 |
PURPOSE:To automatically insert a piston, by slidably fitting both inner and outer cases forming a space in their inside and constituting an actuator device so as to introduce a pressure of fluid into said space and spread the both cases in their sliding direction. CONSTITUTION:Both inner and outer cases 12, 13, being slidably fitted through a seal part 15, are enabled to be spread in their sliding direction by introducing a fluid pressure P from a port 16 into a space 14 formed in the inside of the both cases, and an actuator device 17 is constituted. This actuator device 17 is interposed between the front end face of a piston 3 protruding from a clyinder 2 and a pawl part 7 in the end of a caliper 1. Then the piston 3 is forced to be pressed and inserted into the clyinder 2 by spreading the both cases 12, 13 as described in the above. In this way, the piston used for a disc brake caliper can be automatically further promptly inserted. |
