| 摘要 |
PROBLEM TO BE SOLVED: To provide a yard crane capable of preventing erroneous confirmation of a running direction due to twisting and controlling straight advance running of the yard crane accurately. SOLUTION: This yard crane 10 running in a yard is provided with a satellite radio wave detector 16 for recognizing a position by satellite radio waves and is provided with a plurality of leg parts 12 supported on the yard through a plurality of running wheels 11 and a beam part 13 stretched between the leg parts 12 to constitute the yard crane into a portal shape. Two satellite radio wave detectors 16 are provided in end parts 13a, 13c of the beam part 13 in parallel in the direction of running. COPYRIGHT: (C)2005,JPO&NCIPI
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