To provide a light-weight and a high rigidity telescopic boom suppressing a distortion during manufacturing.SOLUTION: A telescopic boom 13 forms a telescopic constructed by multiple booms, and has a boom fixing mechanism 15 to fix a top boom 21 placed relatively inside with respect to a first intermediate boom 22 placed relatively outside to a prescribed position. The boom fixing mechanism 15 comprises a boom fixing pin 26 provided on the top boom 21 and advancing/retreating against the first intermediate boom 22, a fixing boss 32 provided on the first intermediate boom 22 and into/from which the boom fixing pin 26 is inserted/removed, and a gap maintaining member 90 provided on the fixing boss 32 and protruding outward, and to maintain between the gap maintaining member and a second intermediate boom 23 placed further outside the first intermediate boom 22.SELECTED DRAWING: Figure 4

    【課題】製造時の歪みを抑えた軽量且つ高剛性の伸縮ブームを提供する。【解決手段】伸縮ブーム13は、複数のブームがテレスコピックを成し、相対的に外側に配置された第1中間ブーム22に対して相対的に内側に配置されたトップブーム21を所定位置に固定するブーム固定機構15を有する。ブーム固定機構15は、トップブーム21に設けられ、第1中間ブーム22に対して進退するブーム固定ピン26と、第1中間ブーム22に設けられ、ブーム固定ピン26が挿抜される固定ボス32と、固定ボス32に設けられ、外側へ突出して第1中間ブーム22のさらに外側に配置された第2中間ブーム23との隙間を維持する隙間維持部材90とを備える。【選択図】図4


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    Title :

    TELESCOPIC BOOM


    Additional title:

    伸縮ブーム


    Contributors:

    Publication date :

    2021-12-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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