| 摘要 |
<p>PURPOSE:To damp shock while preventing position at shift of the retreat end position of a piston. CONSTITUTION:An opposing member 76 is arranged opposing to the outer circumferential part of a driving part 58. On either one side of the driving part 58 and the opposing member 76, a braking member 80 which in energized by an energizing member 81 toward the other side is provided. On the other side, a plurality of projection parts 61 to 64 are formed to project so as to move the braking member 80 opposing to energizing force of the energizing member 81 when a piston 48 is moved to the vicinity of its retreat end position.</p> |
