To provide a hook that has high effect of preventing a rope from coming off due to a puzzle-ring phenomenon.SOLUTION: The hook according to one embodiment of the invention has a base end part, a tip part and a hook-shaped part curved in a U-shape from the base end part to the tip part, which comprises: a main latch one end of which is turnably supported on the base end part and the other end of which is in contact with a curved inner surface in the vicinity of the tip part, which opens and closes the hook-shaped part; a main latch energizing member that energizes the other end of the main latch toward the curved inner surface in the vicinity of the tip part; a sub latch a first end part of which approaches a top point of the tip part and a second end part of which approaches the curved inner surface in the vicinity of the base end part, at the hook-shaped part; and sub-latch energizing means that energizes the first end part of the sub latch toward the top point of the tip part. The sub latch is supported turnably at a position closer to the one end side than a center between the one end and the other end of the main latch, and a tip of the first end part of the sub latch does not protrude from the top point of the tip part toward an outer edge.SELECTED DRAWING: Figure 1

    【課題】本発明は、知恵の輪現象によるロープの外れを防止する効果が高いフックを提供することを課題とする。【解決手段】本発明の一態様は、基端部と先端部と上記基端部から上記先端部にかけてU字型に湾曲する鉤状部とを有するフックであって、一端が上記基端部に回動可能に支持され、他端が上記先端部近傍の湾曲内面に当接し、上記鉤状部の開口部を開閉する主外れ止めと、上記主外れ止めの他端を、上記先端部近傍の湾曲内面に向けて付勢する主外れ止め付勢部材と、第1端部が上記先端部の頂点に近接し、第2端部が上記鉤状部で基端部近傍の湾曲内側に近接する副外れ止めと、上記副外れ止めの第1端部を、上記先端部の頂点に向けて付勢する副外れ止め付勢手段とを備え、上記副外れ止めが、上記主外れ止めの一端及び他端間の中央より一端側に近い位置で回動可能に支持され、上記副外れ止めの第1端部の先端が、上記先端部の頂点から外縁に突出しない。【選択図】図1


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    Title :

    HOOK


    Additional title:

    フック


    Contributors:

    Publication date :

    2019-08-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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