| 摘要 |
PROBLEM TO BE SOLVED: To easily grasp the stability limit of a crane by directly expressing the support force of a right and a left outrigger jacks with a numeric in relation to the stability of the crane among the crane operation information to be displayed in a liquid crystal display of a portable operation unit of a remote control device. SOLUTION: At the time of loading with an automobile provided with a crane, crane operation information is obtained in a crane operation information output part 7, in which the detecting signal from a load detecting means 7a and a boom condition detecting means 7b is input. Among the crane operation information obtained by the output part 7, detecting signal of a support force detecting means 2b for detecting the support force of a right and a left outrigger jacks 2a is output as the signal related to the stability of the crane. In a portable operation unit 9, detecting signal of a right and a left support force detecting means 2b, 2b is expressed with a numeric as the signal related to the stability of the crane in the liquid crystal display 9a, and used for grasp of the stability limit of the crane.
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