EP2146038B1 - Window for a double skin facade - Google Patents

Abstract

A window fitting (4) for a double skin facade (8) comprising a frame (12) having a first sash (16), facing an inner side (20), and a second sash (24) facing an outer side (28). The sashes (16, 24) face each other and are spaced so as to define a cavity (32). Advantageously, the sashes (16, 24) are hinged to the frame (12) and both can be opened, independently of each other, towards the inside of the facade (8). The second sash (24) comprises a pane (52) which is constrained by connection devices positioned towards the inside of the window fitting (4) so as not to prove visible from the outside of the facade (8).

Description

• The present invention relates to a window fitting for a double skin facade.
• Specifically, double skin facades comprise two separate sashes, which can be opened separately from each other. The outer sash may be fitted with monolithic glass, structural or not, with natural or forced ventilation and may also be fitted with blinds.
• Double skin facades are increasingly commonly used given the advantages in terms of thermal, acoustic and radiation insulation which they offer.
• The tendency over recent years has been to make double skin window frames as far as possible free of visible structural elements. Such frames are known for example fromWO 91/18175A andCH 232317 A.
• The known solutions present several drawbacks.
• For example, they comprise structural elements relative to the support frame or sash of the outer pane visible from the outside of the facade.
• In addition the known facades of the art are decidedly complicated to clean.
• In fact the outer window or "skin" opens by turning outwards thereby preventing easy access for cleaning the outer pane; consequently cleaning is performed directly from the outside when possible.
• The aim of the present invention is to make a window fitting which resolves the drawbacks mentioned with reference to the known art.
• Such drawbacks and limitations are resolved by a window fitting according to claim 1.
• Other embodiments of the window fitting according to the invention are described in the subsequent claims.
• Further characteristics and advantages of the present invention will be more clearly comprehensible from the description below, made by way of example and not limited to such, of its preferred embodiments, wherein:
• Figure 1 shows a perspective view of a window fitting according to one embodiment of the present invention, from the inner side, in an open configuration;
• Figure 2 shows a perspective of the window fitting infigure 1, from the outer side, in an open configuration;
• Figure 3 shows a front view of the window fitting infigure 1 from the outer side, in a closed configuration;
• Figure 4 shows a perspective of the window fitting according to a further embodiment of the present invention.
• The elements or parts of elements common to the embodiments described below will be denoted by the same reference numerals.
• With reference to the aforesaid figures,reference numeral 4 globally denotes a window fitting according to the present invention, and, specifically, a window fitting for adouble skin facade 8.
• Thewindow fitting 4 comprises aframe 12 having afirst sash 16 or first skin facing towards aninner side 20 of thefacade 8 to which thewindow fitting 4 is applied.
• Theframe 12 comprises asecond sash 24 or second skin facing anouter side 28 of thefacade 8 to which thewindow fitting 4 is applied.
• The first andsecond sashes 16, 24 face each other and are spaced so as to define acavity 32 which may be used, for example, to create natural and/or forced circulation of the air.
• Advantageously, the first and thesecond sashes 16,24 are hinged to theframe 12 and can both be opened, independently of each other, towards theinner side 20 of thefacade 8.
• According to one embodiment the first and thesecond sashes 16, 24 are hinged to an upright 36 of theframe 12.
• According to a further embodiment, the first and thesecond sashes 16, 24 are hinged toopposite uprights 36, 40 of theframe 12.
• According to a further embodiment, the first and thesecond sashes 16,24 are of the 'inner casement' type, that is hinged to theframe 12 along a respective lower base so as to open angularly towards theinner side 20 of thefacade 8; thesecond sash 24 may be provided with a "internal wasistas" opening system.
• Theframe 12 identifies and encloses an aperture or opening 48 on theouter side 28 of thefacade 8.
• Thesecond sash 24 supports at least oneouter pane 52 which virtually forms the second 'skin' of thefacade 8.
• Advantageously, the perimetral dimensions of thesecond sash 24, at theouter pane 52, are smaller or equal to theopening 48 of theframe 12, so as to permit the aperture of the second skin towards the inside of the window fitting 4.
• Preferably, thesecond sash 24 comprises at least one ledge 56 able to form a limit position to the closure of thesecond sash 24.
• In other words, theouter pane 52 has perimetral dimensions equal to those of thesecond sash 24 and equal to those of the opening 48 of theframe 48. This way, in a closed configuration of thesecond sash 24, the outer pane is aligned flush with the outer facade.
• The ledge 56 protrudes laterally in relation to the outer dimensions of thepane 52 so as to form a stop to the closing of thesecond sash 24 which cannot therefore be opened outwards from thefacade 8. Theledge 56 is positioned rearwards of theouter pane 52 so as to permit closing of thesecond sash 24 and so as not to interfere with the opening of the saidsash 24 inwards.
• According to one embodiment, thefirst sash 16 is fitted with blockingdevices 60 able to permit blocking and closure of the sash.
• For example, said blockingdevices 60 comprise a rotating handle.
• Advantageously, thesecond sash 24 comprises theouter pane 52 which is constrained by connection devices positioned towards the inside of the window fitting 4 so as not to be visible from the outside of thefacade 8.
• According to one embodiment of the present invention, the connection devices of thesecond sash 24 comprise a structural weather-sealing.
• According to some possible variations, such connection devices comprise epoxy, silicone and polyurethane glues, or high resistance adhesive tape.
• Preferably, such connection devices are essentially interposed between theouter pane 52 and aperimetral glazing bar 72 of thesecond sash 24 so as to be invisible.
• According to one embodiment, thesecond sash 24, at theperimetral glazing bar 72, comprises a number ofslots 76, passing through the window fitting itself, so as to create ventilation in thecavity 32.
• According to a further variation, the connection devices comprise plates, 80, fitted with threaded connection mechanisms, such as screws or pins, suitable for constraining theouter pane 52 from theinner side 20.
• Specifically, theplates 80 and the screws keep theouter pane 52 detached from theperimetral glazing bar 72 so as to create agap 84 for the ventilation.
• Thesecond sash 24 may have a double-glazed structure, which preferably contains a blind with adjustable fins. In other words, the second sash may comprise an inner pane which forms a double glazed structure with theouter pane 52.
• As may be appreciated from the description, the window fitting according to the invention makes it possible to overcome the drawbacks of the known technique.
• Specifically, the outer sash may be opened inwards so as to enable easy cleaning of the pane, even from the outside.
• Cleaning operations are also safer given that the operator can reach the entire surface of the outer pane without having to lean outside the window fitting.
• In addition, the outer sash, thanks to the structural weather-sealing and/or positioning of the connection devices between the pane and the perimetral glazing bar of the second sash, has no visible metal or plastic structural elements.
• This way a totally flat facade can be created with a series of windows flush with the facade, according to the latest market demands.
• In addition, the window fitting according to the invention allows efficient aeration of the room, given that the two sashes open from the same inner side, thus encouraging ventilation.

Claims (11)

1. Window fitting (4) for a double skin facade (8) having an inner side (20) and an outer side (28), the window fitting comprising a frame (12) having

   - a first sash (16) facing said inner side (20),

   - a second sash (24) facing said outer side (28),

   - said sashes (16, 24) facing each other and being spaced from each other so as to define between them a cavity (32),

   wherein

   - the first and the second sashes (16,24) are hinged to the frame (12) and can both be opened, independently of each other, towards the inner side (20),

   - the second sash (24) comprises an outer pane (52) constrained to the relative sash (24) by connection devices positioned towards the inner side (20) so as to be invisible from the outer side (28),

   characterised in that
   the connection devices are positioned between the outer pane (52) and the perimetral glazing bar (72) of the second sash (24) so as to be invisible from the outer side (28) of the window fitting (4),
   in order to create a ventilation in the cavity (32), the second sash (24), at the perimetral glazing bar (72), comprises a number of slots (76) passing through the bar itself (72) or the connection devices of the outer pane (52) to the second sash (24) comprise plates (80), fitted with threaded connection devices able to constrain the outer pane (52) from the inner side (20), wherein the plates (80) and screws keep the outer pane (52) detached from the perimetral glazing bar (72) so as to create a gap (84) for ventilation.
2. Window fitting (4) according to claim 1, wherein the first and the second sashes (16, 24) are hinged to an upright (36) of the frame (12).
3. Window fitting (4) according to claim 1, wherein the first and the second sashes (16, 24) are hinged to opposite uprights (36, 40) of the frame (12).
4. Window fitting (4) according to claim 1, 2 or 3, wherein the first and the second sashes (16, 24) are of the 'leaf casement' type, hinged to the frame (12) along a respective lower base (44).
5. Window fitting (4) according to claim 4, wherein the second sash (24) is fitted with a mechanism for opening inwardly from the top.
6. Window fitting (4) according to any of the previous claims, wherein the perimetral dimensions of the second sash (24), at the outer pane (52), are smaller than an aperture (48) or opening of the frame (12), so as to enable the aperture of the second sash (24) towards the inner side (20) of the facade (8).
7. Window fitting (4) according to claim 6, wherein the second sash (24) comprises at least one ledge (56) able to create a limit position to the closing of the second sash (24), said ledge (56) being positioned rearwards, towards the inner side (20).
8. Window fitting (4) according to any of the previous claims, wherein the second sash (24) has a monolithic glass structure.
9. Window fitting (4) according to any of the previous claims, wherein between the first and the second sashes (16, 24) there is natural and/or forced ventilation.
10. Window fitting (4) according to any of the previous claims, wherein the connection devices of the outer pane (52) to the second sash (24) comprise structural weather-sealing.
11. Window fitting (4) according to any of the previous claims, wherein the connection devices of the outer pane (52) to the second sash (24) comprise epoxy, silicone and polyurethane glues or high resistance adhesive tape.

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