To provide a boom telescopic control device of a construction machine capable of making multiple telescopic boom members of a multi-stage boom expandable and contractible in a proper order according to a work content.SOLUTION: A controller of a boom telescopic control device can control the expansion/contraction of multiple telescopic boom members of a multistage boom for a first mode and a second mode respectively. In the first mode, the controller allows the second telescopic boom member forming the third stage to be expandable at least based on the first telescopic boom member forming the second stage being in the fully extended state. In the second mode, the controller allows the second telescopic boom member to be expandable even if the first telescopic boom member is not in the fully extended state.SELECTED DRAWING: Figure 2

    【課題】多段ブームの複数の伸縮ブーム部材を、作業内容に対応した適切な順番で伸長可能及び収縮可能にする建設機械のブーム伸縮制御装置を提供すること。【解決手段】ブーム伸縮制御装置のコントローラは、第1のモード及び第2のモードのそれぞれで、多段ブームの複数の伸縮ブーム部材の伸縮を制御可能である。コントローラは、第1のモードでは、2段目を形成する第1の伸縮ブーム部材が最伸長状態であることに少なくとも基づいて、3段目を形成する第2の伸縮ブーム部材を伸長可能にする。コントローラは、第2のモードでは、 第1の伸縮ブーム部材が最伸長状態でなくても、第2の伸縮ブーム部材を伸長可能にする。【選択図】図2


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    Title :

    BOOM TELESCOPIC CONTROL DEVICE OF CONSTRUCTION MACHINE


    Additional title:

    建設機械のブーム伸縮制御装置


    Contributors:

    Publication date :

    2021-02-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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