BUMPER REINFORCEMENT

PROBLEM TO BE SOLVED: To increase a collision resistant load, and to increase an energy absorption amount, by providing a flange only in a lid member, by forming an arrangement form of a welding place in an arrangement form of making shear force act, in a bumper reinforcement formed in a closed cross-sectional shape by a body member and the lid member.SOLUTION: A bumper reinforcement 14 comprises a body member 20 and a lid member 22, and is formed in a closed cross-sectional shape by both members. A reinforcement member 24 is arranged in this closed cross-sectional shape. Joining between the body member 20 and the lid member 22 is formed in an arrangement form of overlapping an inside surface of an opening end part of both side parts 20b and 20c of the body member 20 of a U-shaped cross-sectional shape and both end parts 22b and 22c of the lid member 22, and is joined by spot welding 28 in an overlapped part. Flanges 23b and 23c are extended/arranged in both end parts 22b and 22c of the lid member 22.SELECTED DRAWING: Figure 3 【課題】本体部材と蓋部材により閉じ断面形状とするバンパリインフォースメントにおいて、溶接箇所の配置形態を、せん断力が作用する配置形態とすると共に、蓋部材にのみフランジを設けることにより、耐衝突荷重の増大を図ると共に、エネルギー吸収量の増大を図る。【解決手段】バンパリインフォースメント１４は、本体部材２０と蓋部材２２とを備え、両部材により閉じ断面形状とされる。この閉じ断面形状内に補強部材２４が配設される。そして、本体部材２０と蓋部材２２との接合は、コ字状断面形状の本体部材２０の両側部２０ｂ，２０ｃの開口端部の内側面と、前記蓋部材２２の両端部２２ｂ，２２ｃとが重ね合わされる配設形態とされて、該重ね合わされた部位において点溶接２８されて接合される。蓋部材２２の両端部２２ｂ，２２ｃにはフランジ２３ｂ，２３ｃが延設して配設されている。【選択図】図３