| 摘要 |
PROBLEM TO BE SOLVED: To provide a lower vehicle body structure of an automobile which is achieved in weight reduction, is set at a reverse phase at the mouth-opening deformation of a tunnel fore-and-aft part by the integration of cross members, acts so that the vibration of the reverse phase deforms a seat rail which is rigid-body connected to a seat rail attachment seat, suppresses the vibration by the seat rail having high rigidity, is light in weight and high in rigidity, and can enhance quietness.SOLUTION: One piece of a cross member 35 extending to a vehicle width direction is laid between a side sill 18 in the vicinity of an intermediate pillar 26 and a tunnel part 11, seat rail attachment parts 41, 42 are arranged at least at a lower part of the tunnel part 11 in a position which is separated from the cross member 35 to a fore-and-aft direction, and a bottom face of the seat rail 50 is rigid-body connected to the seat rail attachment parts 41, 42.SELECTED DRAWING: Figure 1 |
