| 摘要 |
PROBLEM TO BE SOLVED: To prevent the tilt-up in a condition that the cab rock is not released. SOLUTION: In this device, a hydraulic pump for feeding the pressure oil to a hydraulic cylinder device capable of tilting a cab is driven by a motor 13. On this occasion, a motor driving electric circuit is provided with a tilt-down detecting switch 21, a cab lock switch 22, a tilt-up detecting switch 23, a switching valve switch 24, and a pump switch 25. A driving circuit of the motor 13 is formed by the cab-lock switch 22, the tilt-up detecting switch 23, the switching valve switch 24 and the pump switch 25 under a condition that the cab lock of a hydraulic latch device is released, and the cab lock switch 22 is turned off in the tilt-up of the cab. The motor 13 is driven for tilt-up, only when the hydraulic latch device is released. Whereby the tilt-up can be prevented without releasing the lock, which prevents the parts from being damaged. |
