| 摘要 |
<p>PURPOSE:To enable free regulation of pressure by remotecontrol, by providing a pressure detecting apparatus and a pressure control apparatus in the line connecting the hydraulic pressure source to the cylinder. CONSTITUTION:The hydraulic pressure being supplied to the head side of a hydraulic cylinder 3 is continually monitored, and in the case where the pressure is desired to adjust, the set value on an electromagnetic relief valve 10 is altered through a control apparatus 11 to effect the pressure regulation. When it is desired to cause an emergency pressure drop, a command is issued to an electromagnetic valve 15 to make the operating oil supplied to the cylinder 3 drained off, and thus pressure regulation is enabled from a remote position.</p> |
