Swing type machine and method for setting a safe work area and a rated load in same

A swing type work machine with an article suspended at a predetermined position of a swing member, comprising:

• a hoisting load detecting means for detecting a hoisting load of said swing member;
• and
• an area data output means which outputs an area data of a safe work area to be used actually, said safe work area being an area where a strength-based safe work area and a stability-based safe work area overlap each other, said strength-based safe work area being established taking a hoisting load and the strength of said swing member into consideration and being circular centered on a rotational center of the swing member, said stability-based safe work area being established taking the stability of the work machine into consideration and having a limit work radius which varies depending on a swing angle of the swing member.

A swing type work machine with an article suspended at a predetermined position of a swing member, comprising:

• a work radius detecting means for detecting a work radius of said swing member;
• and
• a rated load data output means which outputs a rated load selected for each swing angle of said swing member as a rated load to be used actually, said rated load being the lower one out of a strength-based rated load which is established taking said work radius and strength of the swing member into consideration and which is constant independently of the swing angle of the swing member and a stability-based rated load which is established taking the stability of the work machine into consideration and which varies depending on the swing angle of the swing member.