| 摘要 |
<p>PURPOSE:To raise a bed part in parallel and to longitudinally turning the same by making the cross-sectional area of the upper section of a differential cylinder same to that of the ram of a ram cylinder and allowing the upper section of the differential cylinder to communicate with the ram cylinder by a pipe. CONSTITUTION:The cross-sectional area of the upper section 10b of a differential cylinder 4 is made same to that of a ram 8 and the upper section 10b is allowed to communicate with a ram cylinder 3 by a pipe 33. When a bed part is raised in parallel, a motor pump 22 is driven to open a solenoid valve 23 and hydraulic oil is supplied to the lower section 10c of the differential cylinder 3 through a pipe 34 to raise a piston 11. At the same time, the oil of the upper section 10b is supplied to the ram cylinder 3 through the pipe 33 and, therefore, the piston 11 and the ram 8 are simultaneously raised by the same quantity. Further, a pipe 32 supplying and discharging the oil is independently connected to the ram cylinder 3 and a solenoid valve 24 is opened to supply the hydraulic oil to the ram cylinder 3 and the longitudinal turning of the bed part is performed.</p> |
