FRAME STRUCTURE OF VEHICLE SHEET

PROBLEM TO BE SOLVED: To form a configuration whose structural strength hardly decreases even if an end of a frame element is melted down by welding.SOLUTION: A square cylindrical frame 21A formed by bending a thin steel sheet into a closed cross-sectional shape and welding its edges to each other has a configuration where the ends (an upper end 21A5a and a lower end 21A5b) of a seam 21A5, formed by abutting the edges on each other, may be formed by their melting down by welding. A frame structure of a vehicle sheet has a configuration where one metal member and the other metal member sandwich the seam 21A5 so that the ends (the upper end 21A5a and the lower end 21A5b) of the seam 21A5 of the two metal members, which may be formed by the melting down, are sandwiched in the abutting direction and other metal members (a thick plate frame 21B and a belt guide 2B) are provided in a state of being integrally connected to the two metal members, respectively.