| 摘要 |
PURPOSE:To aim at enhancing the safety of operation of a continuous type unloader, by issuing an alarm or stopping the unloader when a deviation of the travel locus of a bucket conveyor scraping section exceeds a predetermined amount with respect to a memorized locus upon automatic operation. CONSTITUTION:Upon playback operation (automatic operation) a computing device 4 computes the present coordinate (x1, y1) of an scraping section in a bucket conveyor in accordance with data from a present position detector 2, and further computes the present deviation DELTAx of the front end of the scraping section in accordance with the thus obtained value and a memorized coordinate (x0, y0) delivered from a momery device 3. Then, a signal in the result of the computation is delivered to a comparator 5 for comparing this signal with allowable deviations DELTAx1, DELTAx2 (where DELTAx1<DELTAx2) which are set on a setting unit 1. If the present deviation DELTAx is greater than the allowable deviation DELTAx1 but less than DELTAx2, an alarm is issued, and further if the value DELTAx is greater than DELTAx2 is, the unloader is subjected to emergency stop.
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