Vehicle body manufacturing apparatus

A vehicle body manufacturing apparatus for welding a first part of a vehicle body to a second part of the vehicle body comprising:

• front sides jig frames and rear sides jig frames disposed respectively on right and left sides and front and rear sides of the vehicle body;
• at least one upper jig frame installed between the front sides jig frames, and the atleast one upper jig frame installed between rear sides jig frames, respectively, the upper jig frame including a front frame member and a rear frame member insertable into an inside of the vehicle body, the front frame member is inserted into the vehicle body through a front opening and the rear frame member is inserted into the vehicle body through a rear opening;
• the atleast one upper jig frame is installed between upper portions elevated from a base of the vehicle body manufacturing apparatus, of the front sides jig frames and the atleast one upper jig frame is installed between upper portions, elevated from the base of the vehicle body manufacturing apparatus, of rear sides jig frames;
• the front frame member and the rear frame member are horizontal and have a height lower than that of the vehicle body such that the front frame member and the rear frame member can be inserted into the vehicle body through the front and rear openings, which are front and rear windshield openings of the vehicle body, respectively;
• a connection mechanism that removably connects insertion ends of the front frame member and the rear frame member;
• and a clamping mechanism that is held on the at least one upper jig frame and that positions the vehicle body, the clamping mechanism including a pressing jig extending from the clamping mechanism to a position inside the vehicle body and that presses the work of the vehicle body in an outward direction relative to the inside of the vehicle body to weld the second part to the first part.