| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid-pressure device for causing a piston of a fluid pressure cylinder to make a reciprocating motion, capable of suppressing a shock resulting from the inversion of a moving direction of the piston.SOLUTION: In a fluid-pressure device, a piston of a fluid pressure cylinder makes a reciprocating motion. The piston moves at a set velocity in a moving operation, and a moving direction of the piston is inverted in an inversion operation. It is defined that time required from deceleration start to deceleration end of the piston in the inversion operation is inversion time. An inversion controller of the fluid-pressure device sets, when the set velocity is equal to or higher than a reference velocity, the inversion time RT_sR, Rt_sL in response to the set velocity, and keeps, when the set velocity is lower than the reference velocity, the inversion time RT_sR, Rt_sL to a value RT_rR, Rt_rL that is a value in a case where the set velocity is equal to the reference velocity.SELECTED DRAWING: Figure 3 |
