Patent ID: 8061743
Filing Date: 2011-11-22
Classification: B60R

Abstract:
1. A bumper reinforcement member of a hollow section comprising a front face, a pair of upper and lower lateral faces; wherein a small groove and a large groove concaved to back side, which have channel shaped cross section and housed in the hollow section, are provided at the front face; and the small groove includes a pair of upper and lower lateral faces, and a groove bottom face, the large groove includes a pair of upper and lower lateral faces, and a groove bottom face, an open space is provided between the groove bottom face of the small groove and the groove bottom face of the large groove, and the pair of upper and lower lateral faces of the small groove is totally encompassed by the pair of upper and lower lateral faces of the large groove; the bumper reinforcement member is configured by a main reinforcement member and a supplementary reinforcement member, which are made through sheet-metal processing, the supplementary reinforcement member being positioned at back side of the main reinforcement member and being attached to the main reinforcement member; the main reinforcement member is a hollow sectional member including the front face and the pair of upper and lower lateral faces, the small groove of channel shaped cross section including the pair of upper and lower lateral faces and the groove bottom face being provided at the front face; the supplementary reinforcement member is a member having a front face opened structure including the pair of upper and lateral faces and the groove bottom face forming the large groove of an opened channel shaped cross section, the supplementary reinforcement member being connected to the main reinforcement member through a connection between front edges of the upper and lower lateral faces of the large groove and back side of the front face of the main reinforcement member, and connected to a vehicle side through a connection between the groove bottom face of the large groove and the vehicle side; and the main reinforcement member is connected to the vehicle side through a connection between the vehicle side and rear edges of the upper and lower lateral faces of the main reinforcement member.