Joint structure of car body skeleton parts, car body skeleton parts and methods for manufacturing the car body skeleton parts

摘要

A joint structure (1) of a body frame part according to the present invention is formed by bending a single metal plate and includes a top plate part (3) and a pair of vertical wall parts (5). ), a pair of vertical ribs 9 that are formed at the longitudinal ends of the body frame part 120 and are joined in a direction intersecting with the body frame part 120 and are erected upward from both side ends 3b of the top plate part 3 . and an outward flange portion 11 continuously formed along the short side of the end side joined to the body frame part 120, wherein the vertical rib portion 9 is formed by overlapping a portion of the metal plate by bending, The branch portion 11 includes a top plate flange portion 11a extending upward from the top plate portion 3 , a vertical wall flange portion 11b extending laterally from the vertical wall portion 5 , and a vertical rib portion 9 . It is comprised by the longitudinal rib flange part 11c extending laterally.