| 摘要 |
PROBLEM TO BE SOLVED: To set up a safety working area and rated load commensurable to the actual lifting capacity, in such slewing type working machinery as a crane or the like. SOLUTION: In this slewing type working machinery which has utilized a method of setting up the safety working area and rated load of this machinery, an area where an intensity safety operation area 41 to be set up in consideration of strength of a slewing body and a stability safety operation area 42 to be set up in consideration of stability in working machinery are superposed on each other is set to be the acturally used safety operation area. Likewise, a lower side of rated load out of intensity rated load to be set up in consideration of strength of the slewing body and stability rated load to be set up in consideration of stability in the working machinery is set up to be the acturally used rated load. Subsequently, with these safety operation areas and their rated load used, safety control and proper display are performed.
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