Patent ID: 6234226
Filing Date: 2001-05-22
Classification: F16L

Abstract:
An apparatus for lining an inner face of a tubular culvert, said apparatus forming a lining pipe in the culvert by forming a tubular body by continuously supplying and spirally winding a long strip member formed with joint portions at both side edge portions thereof, bringing the joint portions into contact with each other and jointing together the joint portions, said tubular body being left in the tubular culvert and newly supplying the strip member at a front side of the tubular body which has already been formed, thereby additionally forming portions of the lining pipe, said apparatus comprising:a forming frame in a closed loop made flexible by a link mechanism having a series of links;rotary guides rotatably installed onto shafts axially supported by the forming frame;a joint mechanism unit attached to the forming frame for jointing together the joint portion of the strip member of the tubular body constituting the already-formed portion of the lining pipe and the joint portion of the newly-supplied strip member; anda regulating frame maintaining a rigidity, having a guide track at an outer periphery thereof and arranged on an inner side of the forming frame, said guide track being brought into contact with outer faces of the rotary guides at the forming frame;wherein the strip member is provided with a plastic deformation performance.