PROBLEM TO BE SOLVED: To provide a slewing crane provided with a boom slewing automatic stop control function in response to a load swing cycle, capable of exerting an appropriate automatic stop control in response to the load swing cycle even if a winch operation is performed along with a boom slewing operation.SOLUTION: According to this invention, necessary winch stop time since the start of a stop control until the stop of a winch is computed, and an early winch stop control is exerted in consideration of the winch stop time so that the winch is stopped at a time when a slewing stop control for reducing a boom slewing speed is started in a load swing cycle in response to a suspension length to correspond to a boom slewing limit, whereby even if a winch hoisting or lowering operation is performed along with a boom slewing operation, it is possible to automatically stop the boom slewing operation without causing load swing.SELECTED DRAWING: Figure 2

    【課題】荷振れ周期に応じたブームの旋回自動停止制御機能を備えてなる旋回式クレーンにおいて、ブーム旋回操作とともにウインチ操作が行われている場合にも、荷振れ周期に応じた適切な自動停止制御を行なえるようにする。【解決手段】この発明では、停止制御を開始してからウインチが停止するまでに必要なウインチ停止時間を演算し、ブームの旋回限界に対応して吊り下げ長さに応じた荷振れ周期でブームの旋回速度を低下させる旋回停止制御が開始される時点ではウインチが停止しているように、ウインチの停止時間を考慮した早めのウインチの停止制御を行なうことによって、ブームの旋回操作とともに、ウインチの巻き上げ又は巻き下げ操作を行っていた場合にも、荷振れを生じさせることなく、ブームの旋回操作を緩やかに自動停止させることができるようにした。【選択図】 図2


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    Title :

    SLEWING CRANE


    Additional title:

    旋回式クレーン


    Contributors:

    Publication date :

    2016-10-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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