Vehicle body frame structure

A vehicle body frame structure for a vehicle, the vehicle body frame structure comprising:

• side sill front pieces extending in a vehicle longitudinal direction of the vehicle and provided on vehicle-widthwise either side of a bottom of the vehicle;
• side sill rear pieces extending in the vehicle longitudinal direction, vehicle-frontward ends of the side sill rear pieces being coupled to respective vehicle-rearward ends of the side sill front pieces;
• front side frames extending in the vehicle longitudinal direction from respective vehicle-frontward ends of the side sill front pieces, the front side frames being provided on vehicle-widthwise either side and vehicle-widthwise inwardly of the side sill front pieces;
• and
• rear side frames extending in the vehicle longitudinal direction, vehicle-frontward ends of the rear side frames being coupled to respective vehicle-rearward ends of the front side frames, wherein
• the side sill front pieces and the side sill rear pieces are coupled linearly at first couplings while extending in the vehicle longitudinal direction, and the front side frames and the rear side frames are coupled linearly at second couplings while extending in the vehicle longitudinal direction, the second couplings being provided rearward of the first couplings in the vehicle longitudinal direction, and
• the front side frames are coupled, at the first couplings, to the side sill front pieces and the side sill rear pieces, to overlap with the side sill front pieces and the side sill rear pieces.