A crawler crane (1) includes: a seating switch (42) that detects whether an operator is in a driver seat (3); a turn angle potentiometer (41) that detects the turn position of a boom; and a controller (30) . The controller (30) is provided with a boom turn restriction control unit (40) for performing a boom turn-restricting control whereby the boom is not allowed to turn within a predetermined angular range above the driver seat (3) on the basis of the output from the turn angle potentiometer (41). The boom turn restriction control unit (40) includes a restriction0canceling unit (40B) that cancels the boom turn-restricting control performed by a turn-restricting unit (40A) if a preset restriction-canceling condition is met. The boom turn restriction control unit (40) cancels the boom turn-restricting control if the seating switch (42) does not detect an operator. Ease of operation and work can thus be improved in a remote operation mode and the like.


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    Title :

    MOBILE CRANE


    Additional title:

    MOBILER KRAN
    GRUE MOBILE


    Contributors:

    Publication date :

    2022-02-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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