| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a grasping force control device and a demolishing machine capable of keeping grasping force of a grasping device constant without holding manipulated variable of an operating part constant. <P>SOLUTION: A pilot check valve 401 is mounted in series to a cylinder 30 and in parallel with a proportional solenoid relief valve 45, and a check valve 48 is mounted on an oil passage 832 connected with an accumulator 46. The inflow of pressure oil supplied to a bottom chamber 33, to the proportional solenoid relief valve 45 is restricted by the check valve 48 and the pilot check valve 401. As the pressure oil supplied to the bottom chamber 33 of the cylinder 30 does not escape from the proportional solenoid relief valve 45 even when the manipulated variable in the grasping direction, of an operation lever 71 is reduced and a pressure set value of the proportional solenoid relief valve 45 is lowered, the grasping force of the grasping device 14 can be kept constat without holding the manipulated variable of the operation lever 71 constant. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
