| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for preventing interference of a crane such as contact of the crane and entanglement of a wire, including a case of traveling of the crane on a plurality of rails different in height. SOLUTION: Among a plurality of cranes 11-31 existing in one building 1, in two cranes existing in a position adjacent in the traveling direction, a mutual distance in the traveling direction is detected, and a lower end position of one crane is detected. When determining that both are mutually approaching from the detected distance, and when determining that there is the possibility of contacting both from the detected lower end position, a warning is given by issuing a command. COPYRIGHT: (C)2010,JPO&INPIT
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