A sheave device retracting and unfolding step (S12) includes winding and unwinding a rope (R) by a winch (W), with a lifting side sheave device (Db) lifted by an assist crane (80). A tension information detecting step (S21) includes detecting rope state information on the rope (R) when the sheave device retracting and unfolding step (S12) is performed. A tension information using step (S30) includes performing at least one of notification to a worker and drive control of the winch W based on the rope state information detected in the tension information detecting step (S21).


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    Title :

    SHEAVE DEVICE RETRACTING AND UNFOLDING METHOD


    Additional title:

    VERFAHREN ZUM EINZIEHEN UND AUSKLAPPEN EINER RIEMENSCHEIBENVORRICHTUNG
    PROCÉDÉ DE RÉTRACTION ET DE DÉPLOIEMENT DE DISPOSITIF DE POULIE


    Contributors:
    ETO TAKAO (author) / MIYA EIJI (author) / SHIMIZU TADAHIRO (author)

    Publication date :

    2025-05-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES / B66D Haspeln , CAPSTANS



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