To easily prevent breakage of a bolt.SOLUTION: A pre-fastening state is made by overlapping a towing hook 7 and a hook fitting part 6 at a vehicle body side in a fastening direction which intersects with a vehicle longitudinal direction, and the towing hook 7 in the pre-fastening state is fastened and fixed to the hook fitting part 6 by a bolt 18 and a nut 19. A bolt shaft 20 of the bolt 18 integrally includes a non-screw part 22 of a non-male screw shape extending from a bolt head part 21, and a screw part 23 of a male screw shape extending from the non-screw part 22. An outer diameter of the non-screw part 22 is set to be an outer diameter of the screw part 23 or more. A shaft length L1 of the non-screw part 22 from the bolt head part 21 to the screw part 23 of each bolt 18 is set to be a length for inserting the non-screw part 22 into a boundary 26 of the hook fitting part 6 and the towing hook 7 in a hook fitting state in which the bolt shaft 20 is inserted in bolt insertion holes 12-15 in the pre-fastening state and the screw part 23 is screwed and fastened to the nut 19.SELECTED DRAWING: Figure 3

    【課題】ボルトの破断を簡易に防止する。【解決手段】牽引フック7と車体側のフック取付部6とを車両前後方向と交叉する締結方向に重ねて締結前状態とし、締結前状態の牽引フック7をボルト18及びナット19によってフック取付部6に締結固定する。ボルト18のボルト軸20は、ボルト頭部21から延びる非雄ネジ形状の非ネジ部22と、非ネジ部22から延びる雄ネジ形状のネジ部23とを一体的に有する。非ネジ部22の外径は、ネジ部23の外径以上に設定されている。各ボルト18のボルト頭部21からネジ部23までの非ネジ部22の軸長L1は、締結前状態のボルト挿通孔12〜15にボルト軸20を挿通し、ネジ部23にナット19を螺合して締付けたフック取付状態において、フック取付部6と牽引フック7との境界26を非ネジ部22が挿通する長さに設定されている。【選択図】図3


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    Title :

    HOOK FITTING STRUCTURE


    Additional title:

    フック取付構造


    Contributors:

    Publication date :

    2020-01-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60D Fahrzeugverbindungen , VEHICLE CONNECTIONS / F16B DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES , Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile



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