| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicle body lower part structure capable of further improving load transmission efficiency of a tunnel part while restraining increase in weight. SOLUTION: An upper panel 11 and a lower panel 12 are joined together to form the tunnel part 20, a U-shaped closed space part 23 is constituted between the upper panel 11 and the lower panel 12 of a portion corresponding to a ceiling part 21 and both vertical wall parts 22 in a vehicle front area of the tunnel part 20, and a rectangular closed space part 24 is provided between the upper panel 11 and the lower panel 12 of the portion corresponding to the ceiling part 21 of the tunnel part 20 in a vehicle rear area of the tunnel part 20. A height position of an upper face 12a of the lower panel 12 from the U-shaped closed space part 23 to the rectangular closed space part 24 is maintained in almost the same height to allow the tunnel part 20 with a closed space structure such as the U-shaped closed space part 23 and the rectangular closed space part 24 to function as a frame member of a floor panel 10 and the strength of a cabin is improved. COPYRIGHT: (C)2005,JPO&NCIPI
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