| 摘要 |
PURPOSE:To perform breaking operations without the use of any breaker by providing a direction switching valve to control a cylinder, a solenoid valve to switch pressure oil, and a switching means to periodically switch the solenoid valve. CONSTITUTION:A direction switching valve 11 to control the operation of a cylinder 7, a solenoid valve 12 to switch the flow of pressure oil, a delay timer to periodically switch the solenoid valve 12, and a switch 14 are provided. When the switching valve 11 is switched to the left, pressure oil is introduced into the head of the cylinder 7, a rod is moved to the right, and the pressure oil is sent back to an oil pressure source 10. Under the condition, when the switch 14 is closed, the delay timer 13 turns ON and the solenoid valve 12 is switched, and thereby the rod is moved to the left and the pressure oil of the head is sent back to the oil pressure source 10. Thus, during the period when the switch 14 is closed, the operations are repeated at allow breaking operations. |
