Joint for the angular connection of hollow profile members (50) intended to form door/window profile frames and the like, wherein the edges of the hollow profile members (50) have been previously cut at an angle such as to obtain a matching contact following the assembly thereof along a plane of symmetry (xx′) passing through the plane of matching contact of the previously cut edges of said hollow profile members (50), the joint comprising
- a slide base portion (2, 2′, 2″) having an angular configuration that corresponds to an angle formed between a pair of hollow profile members (50) being connected, with an upper first base (20) with a centrally located cavity (20a) and with first side parts symmetrically extending on either side of said first base (20), each one of said first side parts comprising a first section (21) extending into a second upwardly sloped section (22), each one of said first side parts having outer planar surfaces (24, 25) able to come into sliding contact with a wall of each one of a pair of chambers (53a, 53b) of the hollow profile members (50) being brought together for connection;
- a sheet metal mobile portion (1, 1′) having a configuration similar to the configuration of said slide base portion (2, 2′, 2″) with an upper second base (10) with a centrally located through hole (10a) and with second side parts symmetrically extending on either side of said second base (10), each one of said second side parts comprising a first planar side surface (11) extending into an inwardly bent second planar side surface (12), said first planar side surface (11) with a length generally equivalent to the length of underlying corresponding said first section (21) and said inwardly bent planar side surface (12) with a length generally equivalent to the length of underlying corresponding said second upwardly sloped section (22) of said slide base portion (2, 2′, 2″), said second side surface (12) extending into an upwardly bent terminal side surface (13) being oriented in a direction parallel to the plane of symmetry (xx′) and terminating at sharp edges (16), said sharp edges (16) being adapted to produce an indentation effect into the walls of chambers (53a, 53b), said sheet metal mobile portion (1, 1′) being superimposed onto said slide base portion (2, 2′, 2″) so that said second base (10) is oriented parallel above said underlying first base (20), said first and second side parts being symmetrically arranged on either side of a plane of symmetry (xx′) passing through the plane of matching contact of the previously cut edges of said hollow profile members (50), and
- a bolt and nut assembly being employed in a tightening process of the joint, said bolt and nut assembly comprising a nut (4) being fitted within said centrally located cavity (20a) of said slide base portion (2, 2′, 2″) and a bolt (5) being adapted to pass through a hole (51a,b) of the hollow profile members (50) lying at said plane of symmetry (xx′) and through said through hole (10a) of said sheet metal mobile portion (1, 1′) and being able to be screwed into said nut (4) to exert an upwardly pushing force onto said sheet metal mobile portion (1, 1′) initiating sliding of said second side surfaces (12) thereof onto said second section (22) of said slide base portion (2, 2′, 2″) leading to said sheet metal mobile portion (1, 1′) being lifted until said sharp edges (16) thereof indent the walls of chambers (53a, 53b) of the hollow profile members (50) being connected, characterized in that:
- said second section (22) of said slide base portion (2, 2′, 2″) extending into an upwardly bent terminal side surface (23) being oriented in a direction parallel to the plane of symmetry (xx′), said second section (22) and said upwardly bent terminal side surface (23) defining a socket (22-23), said second side surface (12) and upwardly bent terminal side surface (13) on either side of said mobile portion (1, 1′) being nested within said socket (22-23) on either side of said slide base portion (2, 2′, 2″);
- each one of said sharp edges (16) of said sheet metal mobile portion (1, 1′) comprising a sharpened edge (16c) adapted to contact and produce an indentation effect into the walls of chambers (53a, 53b), said sharpened edge (16c) being formed through alignment in the longitudinal direction of said mobile portion (1, 1′) of an aberrant sharp edge (16a) resulting from a cutting blade being driven perpendicularly into a web of the sheet metal used in the manufacture of said sheet metal mobile portion (1, 1′);
- said sheet metal mobile portion (1, 1′) having a structure that complies with a set of geometrical parameters:
- an angle (a) formed by each one of said upwardly bent terminal side surfaces (13) of the sheet metal mobile portion (1, 1′) with a corresponding wall of each one of the pair of chambers (53a, 53b) of the hollow profile members (50) whereupon said slide base portion (2, 2′, 2″) is being mounted, has a minimum value of 45°;
- an angle (b) formed by a wall of each one of the pair of chambers (53a, 53b) of the hollow profile members (50) whereupon said slide base portion (2, 2′, 2″) is being mounted with a straight line passing through a terminal point (El) of contact of the inwardly bent said second side surface (12) of the sheet metal mobile portion (1, 1′) with said second section (22) of said base portion (2, 2′, 2″) and through a terminal point (E2) of impact of said sharp edge (16) of said sheet metal mobile portion (1, 1′) respectively onto the opposing wall of chambers (53a, 53b) of the hollow profile members (50) being connected, has a value of the order of 60°, and
- an angle (c) formed by a wall of chambers (53a, 53b) of the hollow profile members (50) being indented by the sheet metal mobile portion (1, 1′) with a line transversally crossing said sharp edge (16) of the sheet metal mobile portion (1, 1′), has a value within a preferred range of 45° -55° and preferably a value of the order of 45°.