Structure modelling roof panel system on vehicle is molded forms inside the structure modelling element, or includes the installation territory which is installed simply in this. In 1st execution form, it is replaced by the structure modelling system where the roof panel, supports the overhead component and the head liner, etc is designed. In 2nd execution form, internal superior structure, is located with the roof panel and the non structure modelling head liner, at the position where it is appointed beforehand, installs all overhead components, easily in superior structure and becomes possible. In 3rd execution form, the structure modelling component becomes pod, all overhead components are installed in this. In the respective execution form, strength with respect to structure is not needed, it becomes the esthetic and acoustic cover. Furthermore, the overhead component, and the head liner where single unit, the roof system which is integrated is supplied by the vehicle manufacturer in the respective execution form, as for this system, the external panel, the structural support component for the overhead component, is installed in this are included.
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