Body floor of vehicle

1. A body floor of a vehicle including seat rails having seats mounted thereto, the body floor comprising:

a center floor including center side members provided on opposite sides of the center floor, a tunnel member provided between the center side members in forward/rearward directions, and a center cross-member extending so as to allow the center side members to be connected to the tunnel member and having a first seat rail and a second seat rail each mounted to the center cross-member;

a rear floor arranged on a rear of the center floor, the rear floor having a rear side member connected to the center side members and being connected to the tunnel member;

a side reinforcement member provided between the center cross-member and the rear floor so as to cover the center side members and the rear side member, the side reinforcement member extending between the center cross-member and the rear floor so as to allow the center cross-member and the first seat rail to be mounted to the side reinforcement member; and

a center reinforcement member provided between the center cross-member and the rear floor so as to cover the tunnel member, the center reinforcement member extending toward the side reinforcement member so as to allow the center cross-member and the second seat rail to be mounted to the center reinforcement member.

2. The body floor of claim 1 , wherein the center floor and the rear floor are connected to each other by a kickup member, the kickup member is connected to the rear floor by extending in an inclined manner from a rear end portion of the center floor to a rear of the body floor, and the center floor and the rear floor have different heights.

3. The body floor of claim 2 , wherein the side reinforcement member includes:

a body part extending in forward/rearward directions so as to cover one of the center side members and the rear side member; and

a mounting part extending from the body part to an area positioned between the center cross-member and the kickup member and having the first seat rail mounted thereto.

4. The body floor of claim 3 , wherein the body part extends to cover the one of the center side members by extending up to a portion at which the body part is connected to the center cross-member, with a support groove being provided in the body part so as to surround the center cross-member while the body part is mounted to the one of the center side members and the rear side member.

5. The body floor of claim 3 , wherein the body part includes a reinforcement part provided therein by protruding therefrom to an inner side of a vehicle body so as to have an inner space in the reinforcement part, with a protruding surface of the reinforcement part being open, wherein the reinforcement part includes support ribs intersecting with each other in the inner space.

6. The body floor of claim 5 , wherein the reinforcement part is configured to protrude to the inner side of the vehicle body and extend so as to cover predetermined portions of the center floor, the rear floor, and the kickup member.

7. The body floor of claim 5 , wherein the support ribs include main ribs extending in forward/rearward directions of the body floor according to a shape of the reinforcement part, and assistant ribs extending from the main ribs in vertical directions so as to be combined with inner surfaces of the reinforcement part.

8. The body floor of claim 2 , wherein a mounting part is configured in a polygon shape having a flat surface at an upper end thereof and has the same height as a height of the center cross-member.

9. The body floor of claim 2 , wherein the center cross-member includes mount holes provided thereon, wherein the seat rails are mounted to the mount holes, and a mounting part includes fixing holes provided thereon, the fixing holes being arranged to be in alignment with the mount holes, whereby the first seat rail is mounted to the mount holes and the fixing holes.

10. The body floor of claim 2 , wherein the center reinforcement member is configured to cover the tunnel member between the center cross-member and the kickup member, the center reinforcement member including a cover part provided thereon to be in contact with an inclined surface of the kickup member and combination parts extending to the center side members positioned on opposite sides of the cover part from the cover part and being in contact with the center floor.

11. The body floor of claim 10 , wherein a lower end portion of the cover part is outwardly bent so as to have a lower-end contact part thereof being in contact with the center floor.

12. The body floor of claim 10 , wherein a rear end portion of the cover part is outwardly bent so as to have a rear-end contact part thereof being in contact with the inclined surface of the kickup member.

13. The body floor of claim 10 , wherein each of the combination parts is configured to have an inner space provided therein and includes reinforcement ribs provided in the inner space, the reinforcement ribs extending to intersect with each other in the inner space.

14. The body floor of claim 10 , wherein each of the combination parts is configured to have a flat surface at an upper surface thereof and have the same height as a height of the center cross-member.

15. The body floor of claim 10 , wherein the center cross-member includes mount holes provided thereon to which the seat rails are mounted, and each of the combination parts includes combination holes provided thereon to be arranged in alignment with the mount holes, so that the second seat rail is mounted to the mount holes and the combination holes.

16. The body floor of claim 1 , wherein the side reinforcement member and the center reinforcement member include flat surfaces that are in contact with the center floor.

17. The body floor of claim 1 , wherein the side reinforcement member and the center reinforcement member are made of aluminum.