| 摘要 |
PURPOSE:To enhance the safety of operation, by providing such an arrangement that the upper limit of travel speed of a scraping section upon automatic scraping operation in which bulk cargo is scraped off while a previously memorized locus is reproduced, is made equal to the travel speed of the scraping section upon teaching operation (manual scraping operation). CONSTITUTION:Upon landing of bulk cargo scraping operation is ar first manually made, and data relating to the positions (including turning angles, etc.) of equipments in a continuous type unloader, such as, for example, a conveyor, a boom conveyor, a rotary conveyor, a bucket conveyor, etc. are stored in a locus computing control device at every travel distance of the scraping section. Then, the unloader is continuously operated in accordance with the stored locus so that a predetermined amount scraping control device 2 controls the predetermined amount scraping operation for bulk cargo. Upon this automatic operation comparation is made between the travel speed Vt of the front end of the scraping section upon teaching operation and an instructing speed Vc necessary for predetermined amount scraping operation, by a comparator 3, and if Vc>Vt, the speed Vt is delivered as an instructing signal.
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