US Patent 9409260 Guide frame support device

Provided is a guide frame support device for a pipe welding device, the guide frame support device, which supports a guide frame provided on an outer circumferential surface of a pipe to be welded, including: a hinge bar connected to an inner circumferential surface of the guide frame; a pair of support bars which rotates around the hinge bar at a predetermined angle; hinge links, one side of each of which is hinge-connected to both ends of the hinge bar and the other side of each of which is connected to both ends of the pair of support bars; and a torsion spring provided between the pair of support bars and for providing elastic force to enable the support bars to rotate around the hinge bar at a predetermined angle.