| 摘要 |
<p>PURPOSE:To enable piston speed to be automatically changed by providing a self-timer two-speed control unit between a fluid pressure source and a cylinder. CONSTITUTION:Between a fluid pressure source 1 and a cylinder 2 is provided a self-timer two-speed control units 6, 106 consisting of meter-out speed controlling valves 7, 107, speed controlling valves 8, 108 for a timer, 2-port control valves 10, 110 and quick exhaust valves 1, 111. Since said controlling valves 7, 107 can be thus automatically changed over, the speed of a piston 22 can be automatically changed.</p> |
