| 摘要 |
<p>PURPOSE:To improve the safety and prevent damage by calculating an actual piling height of containers by a level sensor provided at a cargo crane at the time of receiving or withdrawing, collating it with a memorized value, checking it, and then actuating a spreader. CONSTITUTION:When a cargo crane 4 stores a container A in a containing zone and winds a spreader to its upper limit position, the distance to the piled containers A is measured by a level sensor 16 and inputted to a control device 20. The control device 20 calculates the container height based on it and renews memorized data in a memorizing device 19. When withdrawal is set through an inputting device 18, the crane 4 is moved to a predetermined position based on the data in the memorizing device 19 by the control device 20. The height of the containers A is then measured by the level sensor 16, it is collected with a memorized value, it is checked, and then a spreader is actuated. The memorized value is renewed after withdrawal. The safety can thus be improved.</p> |
