PROBLEM TO BE SOLVED: To provide an expansion boom mounting structure that can increase a width of a base boom and prevent interference between the base boom and an intermediate boom.SOLUTION: The expansion boom mounting structure is configured so that a rear part of a base boom 110 of an expansion boom 100 of a crane is held with a bracket 120 and the base boom 110 is mounted using the bracket 120 to be able to rise and fall relative to a turning post. The bracket 120 comprises contact plate parts 130 and 130 which are joined to wall parts 110A and 110B at both sides of the rear part of the base boom 110. Each contact plate part 130 has a pair of base part pieces 132 and 132 which are held between a pair of holding parts opposing to each other of the turning post to be able to rise and fall. A width W1 between contact plate parts 130 and 130 of a part other than base part pieces 132 is set larger than a width W2 between the base part pieces 132 and 132.SELECTED DRAWING: Figure 2

    【課題】ベースブームの幅を大きくすることができ、ベースブームと中間ブームとの干渉を防止する伸縮ブームの取付構造を提供する。【解決手段】クレーンの伸縮ブーム100のベースブーム110の後部をブラケット120によって保持するとともに、ブラケット120によってベースブーム110を旋回ポストに対して起伏可能に取り付ける伸縮ブームの取付構造であって、ブラケット120は、ベースブーム110の後部の両側壁部110A,110Bに接合される当接板部130,130を備え、この各当接板部130は、旋回ポストの相対向した一対の保持部間に起伏可能に保持される一対の基部片132,132を有し、基部片132以外の部分の当接板部130,130間の幅W1を基部片132,132間の幅W2より大きく設定した。【選択図】図2


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    Title :

    EXPANSION BOOM MOUNTING STRUCTURE


    Additional title:

    伸縮ブームの取付構造


    Contributors:

    Publication date :

    2017-01-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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