Corner joint

Corner joint, which comprises:

• a first section with C-shaped connecting means having outer surfaces;
• a second section with C-shaped connecting means having outer surfaces and which is at an angle to the first section;
• a corner connector located inside the outer surfaces of the first and second sections and including two movable angle pieces with two connector flanges that rest against said sections, said connector flanges being joined to said sections by at least one attachment means;
• said sections including two parallel flanges and a strut on each parallel flange on the side facing the other parallel flange;
• wherein each angle piece exhibits a first wedging face along the connector flanges resting against said sections and also a second wedging face on the side of the connector flange opposite said first wedging face;
• and
• wherein both of said sections have on the struts of both parallel flanges a ridge running parallel to the strut and a nose opposed to said ridge;
• said connector flanges including said wedging faces which press against the nose on the strut;
• said attachment means comprising:
• a clamping piece engaging the ridges by virtue of the shape of the clamping piece;
• at least one wedging piece which rests against the second wedging faces spreading apart the angle pieces;
• and
• a securing means bracing the wedging piece against the angle pieces;
• wherein the clamping piece exerts a clamping action on said sections and wherein the wedging piece exerts a spreading action and the spreading action presses the angle pieces against said noses;
• and
• wherein said sections include a cross-strut extending perpendicular to said parallel flanges and forming a groove with said strut, wherein the connector flanges are pressed into said groove.