PROBLEM TO BE SOLVED: To enable transportation of a frame of an upper revolving structure during transportation of a crane even when a dimension of a boom is expanded in a crosswise direction to inhibit deflection of the boom occurring in the crosswise direction.SOLUTION: An upper revolving structure 16 of a crane 10 includes: a revolving frame 20 which is mounted on a lower running structure 12 so as to freely revolve; and a boom 40 which is provided at the revolving frame 20 so as to freely rise and fall. The revolving frame 20 includes: a pair of attachment brackets 39 where a base end part 40f of the boom 40 is attached so that the boom 40 freely rises and falls; and a front side frame 21 where the pair of attachment brackets 39 is provided so as to be spaced away from each other in a crosswise direction of the upper revolving structure 16. A dimension of the front side frame 21 in a forward-backward direction of the upper revolving structure 16 which intersects with the crosswise direction is smaller than a dimension of the front side frame 21 in the crosswise direction.SELECTED DRAWING: Figure 2

    【課題】ブームの左右方向の寸法を拡大してブームの左右方向のたわみを抑制した場合でも、クレーンの輸送時に上部旋回体のフレームの輸送を実施できるようにする。【解決手段】クレーン10の上部旋回体16は、下部走行体12上に旋回自在となるように搭載される旋回フレーム20と、旋回フレーム20に起伏自在となるように設けられるブーム40とを備え、旋回フレーム20は、ブーム40が起伏自在となるようにブーム40の基端部40fが取り付けられる一対の取付ブラケット39と、一対の取付ブラケット39が上部旋回体16の左右方向において間隔をあけて設けられる前側フレーム21とを有し、左右方向と直交する上部旋回体16の前後方向における前側フレーム21の寸法は、左右方向における前側フレーム21の寸法よりも小さい。【選択図】図2


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    Title :

    UPPER REVOLVING STRUCTURE OF MOBILE CRANE


    Additional title:

    移動式クレーンの上部旋回体


    Contributors:

    Publication date :

    2017-07-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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