To provide a hook which effectively prevents a rope from coming off due to a puzzle ring phenomenon.SOLUTION: A hook according to one embodiment of the present invention includes: a hook body; a main hook latching unit having one end pivotably suspended from a base of the hook body in a swingable manner and the other end biased to be pressed to an inner edge in the vicinity of a tip of the hook body; and a sub hook latching unit pivotably suspended from the main hook latching unit having a first end part close to the tip of the hook body in a state that no external force is exerted. A second end part of the sub hook latching unit may extend to the base side of the hook body and be close to the inner edge inner than a position where the main hook latching unit is pivotably suspended from the hook body in a state that no external force is exerted. The sub hook latching unit may further have both ends bent so as to be positioned inner than a position where the sub main hook latching unit is pivotably suspended in a state that no external force is exerted.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】本発明の一態様に係るフックは、フック本体と、一端が上記フック本体の基部に揺動可能に枢支され、他端が上記フック本体の先端部近傍の内縁に押し当てられるよう付勢される主外れ止めと、上記主外れ止めに揺動可能に枢支され、外力が作用しない状態で第1端部が上記フック本体の先端部に近接する副外れ止めとを備える。上記副外れ止めの第2端部が上記フック本体の基部側に延び、外力が作用しない状態で上記副外れ止めの第2端部が上記フック本体の上記主外れ止めの枢支位置よりも内側の内縁に近接してもよい。上記副外れ止めが、外力が作用しない状態で両端が副外れ止めの枢支位置よりフック本体の内側に位置するよう屈曲していてもよい。【選択図】図1


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    Title :

    HOOK


    Additional title:

    フック


    Contributors:

    Publication date :

    2019-03-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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