Patent ID: 8128154

Claim:
A vehicle floor structure comprising: a floor tunnel frame arranged along a center in a vehicle width direction and extending in a vehicle length direction; side sills arranged on right and left sides of a vehicle body and extending in the vehicle length direction; a plurality of lateral frame members for connecting the floor tunnel frame with the right and left side sills in the vehicle width direction; floor panels bridged between the floor tunnel frame and the side sills; obliquely extending portions that are provided on at least one of the plurality of lateral frame members and extend so as to be inclined with respect to the vehicle length direction in a planar view, connecting respectively with the side sills; and a plurality of concentric arc-shaped beads that are provided in respective regions surrounded by the floor tunnel frame, the side sills, and the lateral frame members, with centers respectively at intersections of the side sills and the obliquely extending portions, wherein at least one of the beads in the respective regions has one end extending so as to be orthogonal to the side sill and the other end extending so as to be orthogonal with respect to the vehicle width direction wherein the side sill comprises: a side sill inner that linearly extends in the vehicle length direction and is joined to an outside edge of the floor panel, the side sill having a U-shaped cross-section opening toward the outside of the vehicle body; a side sill reinforcement member that is joined to the outside edge of the vehicle body of the side sill inner via upper and lower joint flange portions, and has a U-shaped cross-section opening toward the inside of the vehicle body, the side sill reinforcement member together with the side sill inner forming a closed section structure; a front inclined wall provided to an outside wall of the side sill reinforcement member, the front inclined wall protruding longitudinally more toward the outside from a front end thereof to a central portion in the vehicle length direction; and a rear inclined wall provided to the outside wall of the side sill reinforcement member, the rear inclined wall protruding more toward the outside from a rear end thereof to the central portion in the vehicle length direction.