A sheave device retracting and unfolding step includes winding and unwinding a rope by a winch, with a lifting side sheave device lifted by an assist crane. A tension information detecting step includes detecting rope state information on the rope when the sheave device retracting and unfolding step is performed. A tension information using step includes performing at least one of notification to a worker and drive control of the winch based on the rope state information detected in the tension information detecting step
SHEAVE DEVICE RETRACTING AND UNFOLDING METHOD
22.05.2025
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |