Abstract: A manufacturing process of a joint (20) for connecting a leg (23) to a table surface or similar element, said joint (20) being of the type comprising: an expandable body, or expander (16) which can be inserted in the complementary hollow top of said leg (23), at least one expansion grub screw (21) which is screwed into a relative threaded nut (22) fitted into a housing (12) of said expander (16), said grub screw (21) being maneuverable from the outside of the leg (23), and anchoring devices (19) joined to the expander (16) for attaching the surface thereto, is characterized in that said expander (16) and said anchoring devices (19) are produced as two separate components which are subsequently firmly joined together, for example by means of welding.

Abstract: A connection device for the realization of a tubular-frame structure for supporting surfaces constituted by a body (18) from which projects at least one socket (19) for connecting to tubular profiles (15) and possibly, in a generic perpendicular direction or at an angle, projects a connector (20) for the removable connection of a leg (14), in which said at least one socket (19) has a non-continuous external wall (21), which defines a seat (22), attached at the base by an abutment surface (42) for a blocking means, with a threaded hole (25) which houses an operation grain (23).

Abstract: An accessory for fitting work station auxiliary components (14-19) below a work surface (13) which has at least one profile (12) adapted to be fixed below a work surface (13) wherein said profile (12) extends horizontally along the surface (13) and includes at least one attachment element (20-26) for joining the auxiliary components (14-19) to the profile (12), wherein the location of the auxiliary components (14-19) along said profile (12) is interchangeable, and wherein the profile (12) and the at least one attachment element (20-26) are joined using snap-engagement fasteners (28-30)

Abstract: A tubular-frame structure for supporting surfaces comprising a supporting surface (12, 12′), a flat frame (13) and legs (14), in which said frame (13) is composed of tubular profiles (15) which can be combined in various ways, characterised in that all the elements are joined through connection means which provide a firm and dismountable connection, constituted by devices (16) for coupling tubular profiles (15) and devices (17) for coupling tubular profiles (15) with a leg (14).