DEVICE FOR CURLING STRIP MEMBER WITH REINFORCING MATERIAL, METHOD FOR MAKING SPIRAL PIPE, AND DEVICE FOR MAKING SPIRAL PIPE

摘要

In one embodiment, a long strip member (100) with reinforcing material attached continuously in the longitudinal direction and having joints formed at the edges on the opposite sides is fed out, and the adjoining joints are jointed to make a spiral pipe (S).A curling device (3) has a roller for feeding the strip member (100) with reinforcing material and a curl guide. By using the curling device (3), an arcuate curl having a radius of curvature substantially equal to or shorter than that of the spiral pipe (S) is formed in the adjacent strip member (100) with a reinforcing material, and then it is deformed spirally and plastically. Consequently, the spiral pipe (S) can be made while suppressing the action of a restoring force for restoring the strip member (100) with reinforcing material so as to have the original radius of curvature.