| 摘要 |
PURPOSE:To ensure safety at the time of tilting a cabin in such a way that two switches are directly connected to the lever to prevent the cabin from returning to its normal state and on the working circuit of a hydraulic cylinder device. CONSTITUTION:When a cabin 14 is tilted just for the determined angle theta, a lever 12 is set at the position to prevent the cabin 14 from returning to its normal state, and the first switch 10 and the second switch 11 are set in series on the working circuit of a motor. The switch 10 interlocks with the lever 12 and its turning controller 13, and the switch 11 interlocks with a lock device of the cabin 14. As the cabin 14 is turned just for the determined angle theta, the first switch 10 is transferred to its OFF state by an arm 20. Besides, when the second switch is turned on and locked while the lock of the cabin 14 is released, it is set to the OFF state. |
