Swing closure for doors, windows or the like

Swing closure element (1, 1′) for doors, windows or the like, comprising:

• a fixed structure (10), rigidly constrainable to an opening (11) of a door or window or the like, to separate a first space (A) from a second space (B),
• a first movable wing (20) constrained to said fixed structure (10) by a first hinge constraint (21) so as to be pivotable with respect to said fixed structure (10) about a first rotation axis (Z1) of said first constraint (21) according to a predetermined opening rotation direction (W1) oriented from said first space (A) to said second space (B) and an opposite closing rotation direction (W2) oriented from said second space (B) to said first space (A),
• a second movable wing (30) constrained to said first wing by a second hinge constraint (31) so as to be pivotable with respect to said first wing (20) about a second rotation axis (Z2) of said second constraint (31), said first and second wings (20, 30) being movable between a first closed configuration wherein said first and second wings (20, 30) are coplanarly arranged to close said opening (11) and at least a second open configuration wherein the passing between said spaces (A, B) through said opening (11) is allowed,
• an articulated quadrilateral mechanism (50) comprising:
• a fixed member (10a) rigidly constrained to said fixed structure (10);
• a first movable member (51) rigidly constrained to said movable wing (20) and pivotably constrained to said fixed member (10a) by said first hinge constrained (21),
• a second movable member (52, 52′) rigidly constrained to a second movable wing (30) and pivotably constrained to said first movable member (51) by said second hinge constraint (31) and
• a third movable member (53, 53′) connected to said fixed member (10a) and to said second movable member (52, 52′) by a first pin (53a) and a second pin (53b, 53b′), respectively,
• said mechanism (50, 50′) being pivotable according to said predetermined opening rotation direction (W1) starting from a first closed configuration wherein said four members (10a, 51;
• 52, 52′;
• 53, 53′) are parallel to each other, said first and second hinge constraints (21, 31) being arranged in said closed configuration so that a first plane (Z1Z3) containing the axis (Z1) of said first constraint (21) and the axis of said first pin (53a) is spaced from a second plane (Z2Z4, Z2Z4′) containing the axis (Z2) of said second constraint (31) and the axis of said second pin (53b, 53b′), said rotation direction (W1) being oriented from said second plane (Z2Z4, Z2Z4′) to said first plane (Z1Z3),
• said closure element being characterized in that said mechanism (50, 50′) comprises at least one first stiffening member (61, 61′) pivotably constrained to a said first movable member (51) and to a said third movable member (53, 53′) so that in said closed configuration:
• said first stiffening member (61, 61′) is parallel to and spaced with respect to a plane containing said second axis (Z2) and the axis of said second pin (53b, 53b′) and
• said rotation direction (W1) is oriented from said second plane (Z2Z4, Z2Z4′) to said first stiffening member (61, 61′).