Mounting arrangement for the automatic assembly of aggregates prefabricated parts to a car body from below

An automatic mounting device for assembling prefabricated parts to a car body, comprising:

• suspension means for carrying a car body from a first location to a centered location at an assembly station;
• a mounting frame positioned at the assembly station, said mounting frame carrying installation plates arranged substantially in parallel with respect to each other, said installation plates being slidable with respect to the mounting frame, said mounting frame being adjustable to move against a bottom part of the car body, said installation plates being liftable from a first precentered position with respect to the mounting frame, to a second floating position allowing limited floating movement with respect to the mounting frame, the prefabricated parts being arranged on the installation plates;
• a vertical centering journal connected to each installation plate, the prefabricated parts having alignment bores for receiving the corresponding vertical centering journal, each said vertical centering journal protruding beyond the corresponding alignment bore;
• centering bores formed at a bottom part of the car body for receiving the portion of the vertical centering journal protruding beyond the corresponding alignment bore, the prefabricated parts being automatically aligned in an assembly position by means of the floating movement of the installation plates upon movement of the mounting frame toward the car body.