PROBLEM TO BE SOLVED: To provide a tower crane which easily re-tightens bolts attached to the tower crane, and to provide a re-tightening method.SOLUTION: A tower crane 1 includes: a crane post 10; a revolving bearing 20 having an inner ring 21 fixed to the crane post 10 and an outer ring 22 which is provided so as to rotate relative to the inner ring 21; a crane body 30 fixed to the outer ring 22 by bolts 26; and a tool contact part 40 which is detachably supported by the crane post 10. The tool contact part 40 is formed so that a tool W comes in contact with the tool contact part 40 when the crane body 30 is revolved in a state where the tool W is engaged with a head part of one of the bolts 26.SELECTED DRAWING: Figure 1

    【課題】タワークレーンに取り付けられたボルトを簡易に増し締めするタワークレーン及びその方法を提供する。【解決手段】タワークレーン1は、クレーンポスト10と、クレーンポスト10に固定された内輪21、及び、内輪21に対して回転自在に設けられた外輪22を有する旋回ベアリング20と、複数のボルト26によって外輪22と固定されたクレーン本体30と、クレーンポスト10に着脱可能に支持された工具当接部40とを備える。工具当接部40は、複数のボルト26のうちの一つのボルト26の頭部に工具Wを係合させた状態でクレーン本体30を旋回させたときに、工具Wが工具当接部40に当接するように構成される。【選択図】図1


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    Title :

    TOWER CRANE AND RE-TIGHTENING METHOD


    Additional title:

    タワークレーン及び増し締め方法


    Contributors:

    Publication date :

    2016-04-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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