| 摘要 |
<p>PURPOSE:To accelerate motion of the second double acting cylinder at the time of expanding individually and of contraction of the first double acting cylinder by connecting this the second double acting cylinder with a check valve and a speed increasing valve composed of a circulation mechanism which operates in accordance with the differential pressure between the fore and back of said check valve. CONSTITUTION:The second double acting cylinder 2 is connected with a check valve 35 and a speed increasing valve 7 composed of a circulation mechanism 37 which operates in accordance with the differential pressure between the fore and back of said check valve 35. When the second double acting cylinder is expanded solely or together with the first double acting cylinder's 1 being contracted, the pressure of the back oil in the front chamber 2a of the second double acting cylinder 2 becomes high because of pressure of the check valve 35, that shifts the circulation mechanism 37 to the right position. Thereby, a part of the pressure oil in the front chamber 2a flows into the back chamber 2b through a throttle (m), that increases the speed of action of the second double acting cylinder 2.</p> |
