Casement window unit with an operating and closing slide unit for the movable frame of the window unit
A casement window unit including a fixed frame ( 2 ); a movable sash ( 3 ) connected to the fixed frame by a pair of hinged members ( 4, 5 ) joined to respective members of the fixed frame and of the sash so as to allow the movable sash to move between a closed position, where the fixed frame and the sash are in contact with each other, and an open position, where at least one stile ( 3 c ) of the sash is at a certain distance from the fixed frame towards the outside of the room where the window unit ( 1 ) is installed, and vice versa; and a movement arm ( 7 ) acting on the sash in such a way that it moves the sash from the closed position to the open position, and vice versa.
1. A casement window unit, the window unit ( 1 ) comprising at least:
a fixed frame ( 2 ) having a pair of vertical members or fixed stiles ( 2 c ), parallel with each other, and a pair of horizontal members or rails ( 2 a , 2 b ) parallel with each other;
a sash ( 3 ) having a pair of vertical members or stiles ( 3 c ), parallel with each other, and a pair of horizontal members or rails ( 3 a , 3 b ), parallel with each other, and being connected to the fixed frame ( 2 ) by
a pair of hinged members ( 4 , 5 ) joined to respective members of the fixed frame ( 2 ) and of the sash ( 3 ) so as to allow the sash ( 3 ) to move between a closed position, where the fixed frame ( 2 ) and the sash ( 3 ) are in contact with each other, and an open position, where at least one stile ( 3 c ) of the sash ( 3 ) is at a certain distance from the fixed frame ( 2 ) towards an outside of a room where the window unit ( 1 ) is installed;
at least one movement arm ( 7 ) configured to move the sash ( 3 ) from the closed position to the open position, and vice versa;
elements ( 8 ) for stably closing or locking or releasing the sash ( 3 ) closed position on the fixed frame ( 2 ), located on, and acting between, the fixed frame ( 2 ) and the sash ( 3 ) at least at respective vertical stiles, the window unit being characterized in that the window unit comprises:
at least one operating slide ( 9 ) located and movable within a fixed stile ( 2 c ) of the fixed frame in order to slidably support the elements ( 8 ) located on the fixed frame ( 2 );
an operating kinematic pair ( 13 , 14 ) connecting the slide ( 9 ) to a first end of the movement arm ( 7 ), the arm ( 7 ) being articulated, at a second end, to a stile ( 3 c ) of the sash ( 3 );
a control handle ( 10 ) associated with the outside of a fixed stile ( 2 c ) and connected to the slide ( 9 ) in order to move the slide, when actuated manually to predetermined positions, to allow, in sequence, first the sash ( 3 ) to be released from the fixed frame ( 2 ) and then the sash ( 3 ) to be moved towards the open position, and vice versa, and wherein the kinematic pair ( 13 , 14 ) comprises a variable-pitch rack ( 13 ) which is formed on a portion of the slide ( 9 ); the rack ( 13 ) acting in conjunction with a variable pitch pinion ( 14 ) to which an end of the movement arm ( 7 ) of the sash ( 3 ) is articulated; the rack ( 13 ) and the pinion ( 14 ) having surfaces which can mesh to generate the sequential movements for sash ( 3 ) opening and closing by rotation of the movement arm ( 7 ).
2. The window unit according to claim 1 , characterized in that the handle ( 10 ) is provided with a connecting element ( 11 ) for connection to the slide ( 9 ) in order to allow the sequential movements when a handgrip ( 10 a ) is turned.
3. The window unit according to claim 1 , characterized in that the slide ( 9 ) is housed inside a supporting guide arm ( 12 ) associated with an inside of a fixed stile ( 2 c ) and in which the slide ( 9 ) itself is slidable.
4. The window unit according to claim 1 , characterized in that the slide ( 9 ) comprises at least two separate portions that can be joined to each other inside a supporting guide arm ( 12 );
a first portion mounting the elements ( 8 ) for closing the fixed frame ( 2 ) and the other portion constituting one of the members of the kinematic pair ( 13 , 14 ).
5. The window unit according to claim 1 , characterized in that the slide ( 9 ) is divided into at least three separate portions, of which two portions are rods ( 8 a , 8 b ) located on opposite sides of a supporting guide arm ( 12 ) and able to be connected to a portion of the slide ( 9 ) on which the rack ( 13 ) is formed; each rod portion ( 8 a , 8 b ), comprising at least one pin ( 15 ), or boss, for engaging a respective striker ( 16 ) positioned on a lateral surface of a stile ( 3 c ) of the sash ( 3 ) when the sash ( 3 ) is in the closed position.
6. The window unit according to claim 5 , characterized in that one of the rod portions ( 8 b ) is equipped with a pin ( 17 ) or boss able to engage in a drive element ( 11 ) on the control handle ( 10 ) positioned on a fixed stile ( 2 c ), allowing simultaneous sliding of the rod portions ( 8 a , 8 b ) and of the kinematic pair ( 13 , 14 ) along the guide arm ( 12 ) in both directions, thus generating the sequential movement for opening and closing the sash ( 3 ).
7. The window unit according to claim 1 , characterized in that the rack ( 13 ) and the pinion ( 14 ) comprise a flat operating portion ( 13 a , 14 a ) designed to allow the rack ( 13 ) and the pinion ( 14 ) to slide relative to each other without rotation of the pinion ( 14 ), when the control handle ( 10 ) is operated, during which the movement arm ( 7 ) is stationary and positioned between the respective stiles ( 2 c , 3 c ) of the fixed frame ( 2 ) and of the sash ( 3 ), and allowing the sash ( 3 ) to be released, or locked in place, by the closing elements ( 8 ).
8. The window unit according to claim 7 , characterized in that the flat operating portion ( 13 a ) of the rack ( 13 ) constitutes a linear zone of the rack ( 13 ) which is connected to at least one section of a variable-pitch toothing ( 13 b ) forming a surface able to mesh with a respective surface of the pinion ( 14 ); the linear zone having a length which corresponds to at least a disengaging linear movement by a rod portion supporting pin ( 15 ) from a striker ( 16 ) on the sash ( 3 ).
9. The window unit according to claim 7 , characterized in that the pinion ( 14 ) comprises:
a first, supporting portion ( 14 b ), to which the movement arm ( 7 ) is rigidly articulated, and
a second, operating control portion ( 14 c ), which is thicker than the first portion ( 14 b ), the second portion ( 14 c ) comprising a flat-profile front zone ( 14 a ) and at least one zone, adjacent to the flat-profile front zone ( 14 a ), having toothing ( 14 d ) which can mate or mesh with the respective toothing ( 13 b ) of the rack ( 13 ); the second portion ( 14 c ) being rotatably connected to a pin ( 18 ) which is part of a rack ( 13 ) covering element ( 19 ) and integral with a guide arm ( 12 ).
10. The window unit according to claim 9 , characterized in that the second portion ( 14 c ) of the pinion ( 14 ) comprises a rear surface which does not have toothing and makes contact with the first end of the movement arm ( 7 ) articulated to the first portion ( 14 b ); the first end of the movement arm ( 7 ) being shaped to match the rear surface of the second portion so that the first end of the movement arm ( 7 ) is always in contact with the surface of the second portion ( 14 c ), thus obtaining arm rotation, in both directions, even by means of thrust generated on the surface of the second portion ( 14 c ).
11. The window unit according to claim 9 , characterized in that the first portion ( 14 b ) of the pinion ( 14 ) comprises at least one stop tooth ( 14 e ), extending in a plane parallel with the toothing ( 14 d ) present on the second portion ( 14 c ) and extending further than said toothing ( 14 d ); the stop tooth ( 14 e ) being designed to be housed in a respective hollow ( 20 ) in the rack ( 13 ), constituting a mating surface, the hollow ( 20 ) being located next to the remaining toothing ( 13 b ) when a sash ( 3 ) passes from a closed position to an open position, and the stop tooth ( 14 e ) being designed to allow regular pinion ( 14 ) and rack ( 13 ) movement during said sash movement.
12. The window unit according to claim 1 , characterized in that the rack ( 13 ) comprises:
a central, variable-pitch toothing zone ( 13 b ) forming a surface which can mesh with a respective surface of the pinion ( 14 ), and
two linear sections ( 13 a , 13 a ′) located on either side of the central toothing zone ( 13 b ); one of the sections ( 13 a , 13 a ′) being engageable by a flat operating portion ( 14 a ) of the pinion ( 14 ) by operating the control handle ( 10 ) to obtain relative sliding without rotation of the pinion ( 14 ), where the movement arm ( 7 ) is stationary and positioned between the respective stiles ( 2 c , 3 c ) of the fixed frame ( 2 ) and of the sash ( 3 ) to allow the sash ( 3 ) to be released, or locked in place, by the elements ( 8 ).
13. The window unit according to claim 1 , characterized in that the handle ( 10 ) comprises a connecting element ( 101 ) featuring at least one coupling seat ( 102 ) for a drive ( 103 ) integral with a back of a rack ( 13 ) and protruding from the latter.
14. The window unit according to claim 1 , characterized in that the pinion ( 14 ) is equipped with an extension ( 104 ) for connection to the first end of the arm ( 7 ); there being, between the arm ( 7 ) and the extension ( 104 ), an interposed adjustment cam element ( 105 ) for adjusting the angular position of the arm ( 7 ) relative to the extension ( 104 ) when the sash ( 3 ) is in the closed position.