| 摘要 |
PURPOSE:To automatically move a spool valve vertically only by operating ON- OFF valve leading to an oil-pressure pump at a fixed interval of period by providing a spool valve to close any one of a pressure oil inlet and a pressure oil outlet in the sliding hole of the valve. CONSTITUTION:When an oil-pressure pump 14 is operated and ON-OFF solenoid valve 13 is opened, pressure oil is sent from a path 12 to a pressure oil inlet 10, and thereby oil pressure is applied to the whole surface of the lower end of the spool valve 16 to quickly raise the valve 16. When the valve 16 goes up in the valve sliding hole 8, pressure oil goes through a notch 18, a path groove 19 and a path 9 into a cylinder 2, and the piston 6 is raised with the rod 5. After the piston 6 goes up, when the valve 13 is closed, the valve 16 is pushed down. The pressure oil outlet 11 is greatly opened, oil in the cylinder quickly flows through the path 9, the notch 17 of the valve 16, and the path 15 to the oil tank 3, and the piston 6 quickly goes down with a weight 7. |
