| 摘要 |
A cushion mechanism 6 for decelerating a piston rod 30 includes a holder 61 fastened to an end surface of a cylinder portion 42 fitted with an inner peripheral surface of a cylinder tube 10, an annular entry portion 62 provided on the piston rod 30 and advancing into the holder 61 and the cylinder portion 42 in the vicinity of the stroke end, a cushion passage 63 leading a working fluid of the working chamber 2 to a supply/discharge port 41, and an orifice plug 64 fastened to the cushion passage 63, and the cushion passage 63 includes an internal passage 67 extending in a radial direction of the holder 61 and to which the orifice plug 64 is fastened, and the orifice plug 64 is replaceable through a replacement port 71 formed by penetrating the cylinder tube 10 and communicating with the internal passage 67. |
