This invention relates to an apparatus for assembling a door for a vehicle, and is more particularly directed to an assembling apparatus having a set jig for positioning and setting thereon a door provided to the side of an assembling station. The set jig is arranged to be movable to advance toward and retreat from a door opening portion of a vehicle body set on the assembling station so that the door may be assembled with the door opening portion by an advance movement of the set jig.
Usually with this kind of apparatus, as disclosed, for instance, in Japanese Unexamined Patent Application Publication No. Sho 54-5276, a set jig is supported in a floating condition on a frame base which is movable to advance toward and retreat from a vehicle body. A locating member which is to be brought into engagement with a reference opening made in the vehicle body is fixedly provided on the set jig so that before the advance movement of the frame base, the locating member is brought into engagement with the reference opening. While so engaged, the set jig may be moved with the movement of the locating member so as to be set in position at its position corresponding to the door opening portion.
Such a construction, however, is inconvenient in that, because the locating member is forcibly inserted into the reference opening and causes the set jig to move therewith, the vehicle body side is liable to be injured. It often happens that an excessively large force is applied to the locating member. In addition, if a balance mechanism for lightening the movement of the set jig is provided, the apparatus becomes complicated in construction and high in price.