| 摘要 |
PURPOSE:To limit a cushioning effect at a proper time and prevent the deterioration in riding comfort by providing a cylinder which is operated in the direction of limiting the cushioning effect of a cushioning member and switching over a selector valve by means of the signal oil pressure at the time of the specific operation of a construction/operation machine to operate the cylinder. CONSTITUTION:In a construction/operation mechanism, a corner member 11 on the bottom face of a cabin is installed on a mounting member 10 which is integrally provided with the main frame 35 of the machine via cushioning members 12, 12 with a bolt 13 and a nut 14. In this case, a joint 15 is screwed onto the bolt 13 and the end portion of the piston rod of a cylinder 18 is rotatably attached to the joint 15 with a pin 16. The other end side of the cylinder 18 is linked to a linking frame 35 through a pin 17. The upper and lower chambers of the cylinder 18 are connected to a hydraulic pilot type selector valve 19 which is always energized by spring to a position A and, when the pressure of a pipe line 22 rises at the time of traveling switching over the selector valve 19 to a position B, the cylinder 18 is contracted to compress the cushioning members 12. |
