| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve problems comprising the danger of breakage and the lack of safety, because conventional tractors do not adopt components for relating a steering controller to the automatic lifting of an implement and because the implement is placed at a working position (grounding state), when the tractor travels in a state that a rear wheel-steering mode is set, and further a problem comprising complicated lifting operations. SOLUTION: In this steering controller of the tractor 2, an implement 4 mounted in the machine frame 3 of the tractor 2 equipped with a control means 1 capable of being set to a front wheel-steering mode, a rear wheel-steering mode, or a front and rear wheel-steering mode is automatically connected to a lifting means 5, when the implement 4 is switched to a rearward travel. When the rear wheel-steering mode is set, the control means 1 can output a control signal for lifting the implement 4 to drive the lifting means 5 on the lifting side.</p> |
