Scaffold weldment fixing device

The utility model is suitable for a welding technique field provides a scaffold weldment fixing device, stopper on including fixing device, mobile device, chassis and being located the chassis. Fixing device includes connecting piece, driving stem and mounting, and the connecting piece includes first connecting piece, second connecting piece and third connecting piece, and driving stem includes driving lever and driven lever, and the mounting includes fixed block and dead lever. The mobile device includes gear train, movable block and ejector pin, and the gear train passes through the chain to be connected, and the movable block articulates on the chain, ejector pin one end fixed connection stopper, and spacing frame is installed to the other end, and the movable block activity is in spacing frame. First connecting piece and third connecting piece front end be articulated driven lever all, the terminal articulated driving lever upper end of first connecting piece, and the driving lever lower extreme articulat