PROBLEM TO BE SOLVED: To provide a sheave unit capable of suppressing deformation of each prevention part and preventing a rope from being erroneously wound around a jib point sheave.SOLUTION: A sheave unit comprises a support shaft, at least one jib point sheave 64, and a sheave guard 70. The sheave guard 70 includes a plurality of prevention parts 72, a connection part 74 for connecting parts, which are positioned below a center of the jib point sheave 64 in a working posture and positioned at the side of the center of the jib point sheave 64 in a wound posture, one another among a plurality of prevention parts 72, and a regulation part 76 for regulating insertion of a rope into a gap between the connection part 74 and the jib point sheave 64.SELECTED DRAWING: Figure 6

    【課題】各阻止部の変形を抑制し、かつ、ロープのジブポイントシーブへの誤掛け回しを防止可能なシーブユニットを提供すること。【解決手段】シーブユニットであって、支軸と、少なくとも一つのジブポイントシーブ(64)と、シーブガード(70)と、を備え、シーブガード(70)は、複数の阻止部(72)と、複数の阻止部(72)のうち、作業姿勢のときにジブポイントシーブ(64)の中心の下方に位置する部位であって、掛け回し姿勢のときにジブポイントシーブ(64)の中心の側方に位置する部位同士を互いに連結する連結部(74)と、連結部(74)とジブポイントシーブ(64)との隙間へのロープの挿通を規制する規制部(76)と、を有すること。【選択図】図6


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    Title :

    SHEAVE UNIT


    Additional title:

    シーブユニット


    Contributors:

    Publication date :

    2018-05-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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