| 摘要 |
PROBLEM TO BE SOLVED: To prevent booming noise such as sound noise from occurring in a passenger compartment when some impact force is given to a vehicle body, in the case of forming a bead group in a roof panel in order to improve rigidness of the roof panel forming the top face of the passenger compartment, and achieve the aim while excellently retaining the productivity of vehicle bodies.SOLUTION: A bead group 34 having a plurality of beads 33 extending in the longitudinal direction of a vehicle body 2, and arranged in parallel in the width direction of the vehicle body 2 is formed on a roof panel 9 forming the top face of a passenger compartment 3 inside the vehicle body 2. The bead group 34 comprises front and back bead groups 34a and 34b arranged so as to be separated from each other in the longitudinal direction of the vehicle body 2. A position of each of the beads 33 of the front bead group 34a, and a position of each of the beads 33 of the back bead group 34b are different from each other in the width direction of the vehicle body 2. |
