A joint for angular connection of hollow profile members (50) to form door/window profile frames, wherein edges of the hollow profile members (50) are cut at an angle to obtain a matching contact following assembly thereof along a plane of symmetry (xx′) passing through a plane of matching contact of the cut edges of said hollow profile members (50), the joint comprising:
- a slide base portion (2, 2′, 2″) having an angular configuration corresponding to an angle formed between a pair of connected hollow profile members (50), with an upper first base (20) with a centrally located cavity (20a) and with first side parts symmetrically extending on either side of said upper first base (20), each of said first side parts comprising a first section (21) extending into a second upwardly sloped section (22), each of said first side parts having outer planar surfaces (24, 25) configured to slidably contact a wall of each of a pair of chambers (53a, 53b) of the hollow profile members (50);
- a sheet metal mobile portion (1, 1′) having an upper second base (10) with a centrally located through hole (10a) and second side parts symmetrically extending on either side of said upper second base (10), each 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 equivalent to a length of said first section (21) and said inwardly bent planar side surface (12) with a length generally equivalent to a length of 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) oriented in a direction parallel to the plane of symmetry (xx′) and terminating at sharp edges (16), said sharp edges (16) adapted to produce an indentation effect into walls of chambers (53a, 53b), said sheet metal mobile portion (1, 1′) 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 symmetrically arranged on either side of the plane of symmetry (xx′) passing through the plane of matching contact of the cut edges of said hollow profile members (50), and
- a bolt and nut assembly comprising a nut (4) fitted within said centrally located cavity (20a) of said slide base portion (2, 2′, 2″) and a bolt (5) 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 fastenable to 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″) and lifting of said sheet metal mobile portion (1, 1′) until said sharp edges (16) thereof indent the walls of chambers (53a, 53b) of the connected hollow profile members (50),
- wherein said second section (22) of said slide base portion (2, 2′, 2″) extends into an upwardly bent terminal side surface (23) 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′) 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 an edge (16c) adapted to contact and produce an indentation effect into the walls of chambers (53a, 53b), said edge (16c) formed through alignment in the longitudinal direction of said mobile portion (1, 1′) of an aberrant sharp edge (16a) resulting from a cutting blade 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 of said upwardly bent terminal side surfaces (13) of the sheet metal mobile portion (1, 1′) with a corresponding wall of each of the pair of chambers (53a, 53b) of the hollow profile members (50) whereupon said slide base portion (2, 2′, 2″) is mounted, and having a minimum value of 45°;
- an angle (b) measuring 60° and formed by an inner 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 mounted, and having a straight line passing through a terminal point (E1) 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 connected hollow profile members (50), and
- an angle (c) formed by a wall of chambers (53a, 53b) of the hollow profile members (50) 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′), and having a value with a range of 45°-55°.