| 摘要 |
PROBLEM TO BE SOLVED: To provide a mobile crane provided with a monitoring device capable of certainly monitoring the state of an outrigger at low cost. SOLUTION: The outrigger monitoring device is provided on the mobile crane. In each of the four outriggers 5, a detector 8 using a limit switch 81 for detecting that a ground-contact member 59 is in ground-contact attitude or in non-ground-contact attitude is provided on a distal end of a distal end arm 55. The outrigger monitoring device outputs a warning signal of the matter when it is determined that a ground-contact plate 57 is in the non-ground-contact state in any one of the four outriggers 5 based on the detection results of these detectors 8. COPYRIGHT: (C)2007,JPO&INPIT
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