Pivot coupling for barrier wall sections, includes cooperating concave and convex clamping surfaces for fixing adjoining wall sections into position

摘要

Two cavities are positioned vertically above each other in the vertical side of a first wall section and these are used to receive coupling fittings (5) protruding from vertical sides of the second wall section. The cavities define a vertical pivot axis (11) for the second wall section and in the region of these cavities are clamping devices for cooperating with the coupling fittings. The clamping devices can be pivoted into a position where the coupling fitting and second wall section are freely rotatable about the pivot axis, and a locking position where the coupling fitting is pulled radially inwards towards the pivot axis so that the wall sections are in contact with each other. This radial movement can be carried out by providing the clamping devices with axially movable clamping parts (23) having concave conical clamping surfaces (27), and by providing the coupling fittings with corresponding convex conical clamping surfaces (28).