Abstract: Each rear pillar (4) includes a rear pillar inner panel (33) and a rear pillar reinforcement (34). The rear pillar inner panel (33) and the rear pillar reinforcement (34) each include a substantially L-shaped corner portion (C1, C2) raised toward the rear pillar inner panel (33), and a ridge portion (X1, X2). The corner portions (C1, C2) are arranged next to each other in the direction toward a reinforcement (50), and an L-shaped closed cross section (40) is formed between the corner portions (C1, C2). The reinforcement (50) is, not via the closed cross section, directly connected to the corner portions (C1, C2). An upper portion of the L-shaped closed cross section (40) is connected to a closed rear header cross section (19).

Abstract: Each rear pillar (4) includes a rear pillar inner panel (33) and a rear pillar reinforcement (34). The rear pillar inner panel (33) and the rear pillar reinforcement (34) each include a substantially L-shaped corner portion (C1, C2) raised toward the rear pillar inner panel (33), and a ridge portion (X1, X2). The corner portions (C1, C2) are arranged next to each other in the direction toward a reinforcement (50), and an L-shaped closed cross section (40) is formed between the corner portions (C1, C2). The reinforcement (50) is, not via the closed cross section, directly connected to the corner portions (C1, C2). An upper portion of the L-shaped closed cross section (40) is connected to a closed rear header cross section (19).

Abstract: A vehicle body structure of a vehicle including a seat, having a baggage compartment at a rear portion in a cabin, comprises a seat back supported by a hinge member provided at a lower portion of the seat so as to rotate in a longitudinal direction, the seat back being provided to be held in a specified upright position, a first engagement portion provided at an outside end portion of the seat back, a second engagement portion provided at a portion of a vehicle sidewall portion corresponding to the first engagement portion, wherein the first and second engagement portions are configured to be fixed in a vehicle width direction when the seat back is in the specified upright position. Thereby, a rigidity of the vehicle body can be improved by using the seat back.

Abstract: A floor is partitioned into a plurality of areas S1 to S4 by a floor tunnel portion 11, side frames 13, side sills 12, and cross members 7, 8, 15, and 16, and the rigidity of the floor panels of the areas S1 to S3 is adjusted by rigidity adjustment portions 20, 21, 22, 23, and 25. These floor panels are set such that their natural frequency in a 2×1 mode, in which two antinodes are generated in the length direction of the automobile and one antinode is generated in the width direction of the automobile, is 240 to 260 Hz. Thus, a reduction in road noise due to automobile tire cavity resonance is achieved.

Abstract: A floor is partitioned into a plurality of areas S1 to S4 by a floor tunnel portion 11, side frames 13, side sills 12, and cross members 7, 8, 15, and 16, and the rigidity of the floor panels of the areas S1 to S3 is adjusted by rigidity adjustment portions 20, 21, 22, 23, and 25. These floor panels are set such that their natural frequency in a 2×1 mode, in which two antinodes are generated in the length direction of the automobile and one antinode is generated in the width direction of the automobile, is 240 to 260 Hz. Thus, a reduction in road noise due to automobile tire cavity resonance is achieved.