Abstract: A roof structure for a modular vehicle body consists of a plurality of independent sections, i.e., a pair of roof side rails constituting part of body side assemblies, a front roof rail, a rear roof rail and a roof. The front roof rail extends between the front end of the roof side rails and is mechanically fastened to same by matched flanges and brackets. The rear roof rail extends between the rear ends of the roof side rails and attached to same similarly to the front roof rail. The roof is provided with brackets which are respectively placed on the front roof rail, rear roof rail and the roof side rails and mechanically fastened to same.

Abstract: A vehicle body consists of six independent body sections, i.e., an engine compartment assembly, floor assembly, rear end assembly, a pair of body side assemblies and roof assembly. The assemblies are prepared and painted independently and then respectively provided with equipment such as an engine, suspensions, upholsteries, etc. so as to constitute an engine compartment module, floor module, rear end module, body side modules and roof module, respectively. A complete vehicle or nearly complete vehicle is obtained by joining the modules together with bolts and nuts.

Abstract: A vehicle frame consists of three longitudinally separate frame sections, i.e., a front frame section, center frame section and a rear frame section. The frame sections are manufactured and assembled in the respective independent lines and painted and equipped with chassis sub-assemblies independently, whereby to constitute a front frame module, center frame module and a rear frame module, respectively. The frame modules are finally bolted together to constitute a complete chassis.

Abstract: An inventive headlight optical axis aiming measuring apparatus and method is disclosed. The apparatus includes a head measuring horizontal and vertical inclinations of a front lens surface (34) of a headlight (12) installed in a vehicle (2) and including a plurality of contact-type displacement sensors (48, 49, 50, 51), each of which is associated with a device (28, 29, 30) in contact with the front lens surface (34) and moving in accordance with the inclinations of the front lens surface (34), a support (15) for the displacement sensors (48, 49, 50, 51), and device for checking the headlight optical axis aiming in accordance with a fixed relationship between inclinations of a headlight optical axis and the front lens surface (34) by means of outputs of the measuring head (9). In accordance with this invention, the headlight need ot come on and a large space is not required for projecting the headlight beam onto a screen.