| 摘要 |
PURPOSE:To make constitution of a reservoir simple, by so constituting that an oil reservoir is made into two-phase constitution and a connecting pipe connecting the lower part of an oil level with a connecting opening of the upper part of a cylinder is opened. CONSTITUTION:Although a piston rod 22 enters into an inner cylinder 13 and a piston 20 is moved upward through an upward movement of a rear frame not illustrated, motion of which is attenuated by an orifice not illustrated. In this instant, oil corresponding to an intrusion of the piston rod 22 is streamed in an oil reservoir 30 from a throttle opening 32 of a throttle component 14. In this instance, as the inside of the oil reservoir 30 which is filled with compressed nitrogen is in two-phase constitution of oil-gas, inflow oil guided by the oil phase is balanced by compressing the gas. The oil is returned into a cylinder 13 through an opening 35 by receiving gas pressure due to a descent of the piston rod. With this constitution, a partition becomes unnecessary within the oil reservoir and constitution can be simplified. |
