| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic device for a loading device capable of carrying a cargo onto the top surface of a platform by shutting off a flow of the pressure oil in double ways from one side oil chambers of a right and a left lift cylinders to prevent the generation of inclination of the platform even in the case of carrying the cargo in the eccentric condition in relation to the platform. SOLUTION: This hydraulic device for a loading vehicle for carrying cargos is provided with a right and a left lift cylinders for operating the platform 52 upward and downward. One side oil chambers 86R and 86L of the right and the left lift cylinders 56R and 56L are connected to a pressure oil source 81 through a pressure oil supply passage, and the other side oil chambers 87R and 87L thereof are connected to an oil tank 89 through a return circuit, and a control means for controlling supply, flow quantity and flow direction of the pressure oil to these circuits is provided. A right branch supply circuit 85R and a left branch supply circuit 85L divided from a main supply circuit of the pressure oil supply circuit are provided with each of pilot operation check valves 2R and 2L to shut off the flow of the pressure oil in double ways from the right and the left one side oil chambers. COPYRIGHT: (C)2005,JPO&NCIPI
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