To provide a control device for tilling height, capable of lifting and lowering a tiller based on a laser beam and making an operator recognize the attainment of a tiller to a lifting or a lowering limit.
An automatic control system for lifting and lowering a tiller is constituted so as to pass a standard light into a target incidence position at the middle position in the vertical direction of a receiving part S attached to the tiller. When the attainment of the tiller to an upper limit position preset based on a body is detected by the lifting and lowering operation of the system, a restraining means for stopping the control operation of the tiller at a point after the detection and an informing means F for operating an information device so as to make an operator recognize the state are installed.
Nakagawa, Takao
Hasegawa, Shigekazu
Yasumi, Takashi
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