Hanger conveyance in automobile assembly line

A system for circulating at least one hanger for the transport of left-hand and right-hand automobile door assemblies from and back to a loading site through a door fitting station and then through an unloading site, which system comprises:

• an overhead conveyance track extending from and back to the loading site through the door fitting station and then through the unloading site and having at least one trolley movable along the track and extending downwardly therefrom;
• the hanger having first and second door supports for the support of the left-hand and right-hand door assemblies generally in parallel relation to each other, respectively, and adapted to be removably suspended from the trolley, the door assemblies being mounted on the first and second door supports successively at the loading site after having been removed from an automobile body structure;
• a first turntable assembly arranged at the door fitting station for turning through 180.degree. about a vertical axis the hanger which has been moved thereto along the track from the loading site with the left-hand and right-hand door assemblies confronting first and second directions opposite to each other, respectively, said left-hand and right-hand door assemblies being, after the hanger has been turned 180.degree. by the first turntable assembly, rendered to confront the second and first directions, respectively;
• and
• a second turntable assembly arranged at the door fitting station on the downstream side of the first turntable assembly with respect to the direction of transport of the hanger towards the unloading site for again turning the hanger through 180.degree. about a vertical axis to render the left-hand and right-hand door assemblies to confront the first and second directions, respectively.