To provide a construction machinery capable of storing an auxiliary sheave and putting it into an operable state by simple operation and compactly storing the auxiliary sheave.SOLUTION: A construction machinery includes a bracket mounted on a tip part of a boom such that a base end side is rotatable around a horizontal shaft, an auxiliary sheave rotatably mounted on a tip side of the bracket, a first fixture detachably fixing the bracket at a first rotation angle position where at least a part of the auxiliary sheave is protruded forward from the tip part, and a second fixture detachably fixing the bracket at a second rotation angle position where the entire auxiliary sheave is not protruded forward from the tip part.SELECTED DRAWING: Figure 2

    【課題】簡便な操作で補助シーブを格納及び作業可能な状態にすることができ、しかも、補助シーブをコンパクトに格納することができる建設機械を提供することを課題とする。【解決手段】本発明の建設機械は、ブームの先端部に、基端側が水平軸周りに回転可能に取り付けられたブラケットと、上記ブラケットの先端側に回転可能に取り付けられた補助シーブと、上記ブラケットを、上記補助シーブの少なくとも一部が上記先端部よりも前方に突出した第1の回転角度位置に着脱可能に固定する第1固定具と、上記ブラケットを、上記補助シーブの全体が上記先端部よりも前方に突出しない第2の回転角度位置に着脱可能に固定する第2固定具とを備える。【選択図】図2


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    Title :

    CONSTRUCTION MACHINERY


    Additional title:

    建設機械


    Contributors:

    Publication date :

    2020-12-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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