| 摘要 |
<p>PURPOSE:To relieve the shock at the time of a start or stop, by providing a control part, which corrects the deviation of the actual speed from the preset target sped in an actuator, thereby operating an electromagnetic control valve. CONSTITUTION:A lift cylinder, which is controlled by electromagnetic control valves 7 and 14, is provided with an operation part 18, which outputs an electric signal corresponding to the target speed, and a control part, which outputs electric signals for a slow speed at the time of a start or stop. The control part 19 is connected to both an electromagnetic control valve 7 and an actual speed detecting part 20 for the lift cylinder 1. The deviation of the actual speed from the target speed is corrected at the control part 19, and the electromagnetic control valves 7 and 14 are operated in accordance with the signal thus corrected. With this contrivance, the shock at the time of a start or stop can be relieved.</p> |
