Patent ID: 11208150

Abstract:
An automotive frame member includes a hat member and a closing plate, in which the hat member includes a top plate, two vertical walls, and two flanges, the two vertical walls are positioned between the top plate and the flanges, respectively, the two vertical walls face each other, the two flanges are respectively joined to the closing plate, each of the two vertical walls includes plural groove parts extending in a direction vertical to a longitudinal direction of the hat member, the groove part includes a bottom surface and two side surfaces, the two side surfaces face each other, the two side surfaces are positioned on both sides of the bottom surface, and a width a of the groove part and a depth b of the groove part in a cross section parallel to the top plate, and a height c of the vertical wall in a direction vertical to the top plate satisfy relations of 0.2≤a/c≤0.3 and 0.2≤b/c≤0.3.