Complex structure obtained from the utilization of particular clamps

Claim 1

A three way or four way clamp adapted to carry out the assembly of at least two panels which comprises four members, each member being formed substantially by two rectangular plates which are parallel and connected by a dihedral structure, the said plates having inclined edges and being coupled in pairs, said plates being provided with a continuous relief, said clamp being intended for use with spiders by means of a screw, wherein the said dihedral structure is off-center relative to the transversal axis of the plates, so that said pairs fit into each other according to a mutually orthogonal arrangement, said dihedral structures delimiting a through-hole, said screw fitting into said through-hole, said screw connecting said spiders, wherein the said spiders show a central core of frustoconical shape and are provided with arms having a substantially trapezoidal section, said spiders pressing on the inclined edges of the two pairs of said plates and forming a cylindrical seat to receive the head of the said screw and an inner threading.