| 摘要 |
[Problem] To provide an articulated vehicle which permits steering control not only suited for traveling on general roadways but also suited for work at construction sites. [Solution] An articulated construction vehicle is provided with an articulated, self-propelled body 1, body-articulating hydraulic cylinders 2 for articulating the self-propelled body, a pilot-operated directional control valve 5 for controlling a flow of pressure oil to the body-articulating hydraulic cylinders 2, and a steering-wheel-operated control device 6 for outputting a pilot signal to corresponding one of signal-receiving ports of a directional control valve 7 by rotational operation of a steering wheel 7A. The articulated construction vehicle is also provided with a lever-operated, electrical control device 10 for outputting an electrical signal by tilt operation of a lever 11A, a controller 11 for being inputted with the electrical signal from the control device 10 to output an electrical signal concerning the operation of the lever 11A, a signal conversion means for converting the electrical signal into a pilot signal and outputting the pilot signal to corresponding one of the signal-receiving ports of the directional control valve 5 to switch the control valve 5, and a selection means of an operation system that operation of the directional control valve 5 by the rotational operation of the steering wheel 7A and operation of the directional control valve 5 by the tilt-operation of the lever 11A can be selectively performed.
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