Double bar connector for mesh or formwork beams in mine or tunnel frames, comprises bars with nesting curved coupling regions

摘要

The two bars (1) have (semi-)cylindrical shaped coupling sections shaped so that one of these regions nests inside the other. The curvature midpoint for the coupling region corresponds to the midpoint of the hole (2) for the screw bolt (3) used to pivotally join the two bars together. The length direction beams are joined together by a connector comprising two bars with a (semi-)cylindrical coupling section and a straight perforated end section (4). The beams are welded to the perforated end sections.