Provided is an apparatus capable of preventing an auxiliary cylinder attached to a derricking member of a working machine from undesirable rotational movement. The apparatus includes an auxiliary cylinder capable of making expansion and contraction motions, an auxiliary-cylinder angle detector, a fixing device, and an expansion controller. The fixing device fixes the auxiliary cylinder to the derricking member when the expansion length of the auxiliary cylinder is in the fixing allowing range, and releases the fixing of the auxiliary cylinder at other times. The expansion controller judges the posture of the auxiliary cylinder based on the auxiliary-cylinder angle detected by the auxiliary-cylinder angle detector, allows the expansion and contraction motions when the auxiliary cylinder is in the vertical posture, and prohibits the auxiliary expansion and contraction motions when the auxiliary cylinder is in a posture other than the vertical posture and the auxiliary cylinder is fixed to the derricking member.


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    Title :

    Auxiliary cylinder apparatus, working machine including same, and use of auxiliary cylinder


    Contributors:

    Publication date :

    2022-11-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES





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