Provided is a controller with high versatility that can automatically store or raise a boom and can be commonly used for various boom devices. The controller generates a function based on a length of a boom and a distance from a derrick fulcrum of the boom to an engaging member stored in a memory, and a depression angle of the engaging member with respect to the fulcrum. Then, the controller substitutes a derrick angle of the boom detected by a derrick angle sensor into the generated function to calculate a displacement distance from a distal end of the boom to the engaging member. The controller rotates a winch while raising and lowering the boom between a lowered position and a raised position such that the calculated displacement distance is a distance corresponding to an unwinding length of a wire detected by a length sensor.


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    Title :

    CONTROLLER, BOOM DEVICE, AND CRANE VEHICLE


    Contributors:

    Publication date :

    2022-07-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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