PROBLEM TO BE SOLVED: To provide an improved counterweight device of a movable lift crane.SOLUTION: A lift crane 10 includes a counterweight unit 35 supported over a rotary floor 20 under the configuration that the counterweight unit is movable with respect to a counterweight support frame and a counterweight unit moving device jointed between the counterweight support frame and the counterweight unit 35 such that the counterweight unit 35 approaches or keeps away from a boom 22. The counterweight unit 35 is moved by a counterweight moving device such that a gravity center of the counterweight unit 35 is located in front of a rearmost part of the rotary floor during the crane work.SELECTED DRAWING: Figure 3

    【課題】改良した移動式吊り上げクレーンのカウンタウエイト装置の提供。【解決手段】吊り上げクリーン10は、カウンタウエイト支持フレームに対して移動できる形態で回転床20上に支持されているカウンタウエイトユニット35と、カウンタウエイトユニット35をブーム22に近づけたり遠ざけたりするように、カウンタウエイト支持フレームとカウンタウエイトユニット35との間に結合されているカウンタウエイトユニット移動装置とを備えている。クレーン作業中に、カウンタウエイトユニット35の重心が回転床の最後方部分の前に位置するように、カウンタウエイト移動装置でカウンタウエイトユニット35を移動させる。【選択図】図3


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    Title :

    LIFT CRANE INCLUDING MOVABLE COUNTERWEIGHT


    Additional title:

    可動のカウンタウエイトを備えた吊り上げクレーン


    Contributors:

    Publication date :

    2018-07-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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