AN OPENABLE WINDOW WITH MAIN FRAME AND SASH COVERING MEMBERS

Abstract: In a roof window with a frame structure and an openable, pane supporting sash structure, the top, bottom and side members (1-8) of the frame and sash structures are for the major part made as wood profiles, which on the outwards facing sides are covered by covering members of weather-shielding material connected with the wood profiles by means of engagement and securing means. The covering members (11, 12, 15, 17, 20, 21, 32) consist of an upper and a lower cap member (20, 21) on the frame and sash side members (3, 4, 7, 8) designed as flat, trough-shaped profiles with identical, substantially U-shaped profile cross section comprising an exterior wall (20a, 21a) and two low side walls (20b-c, 21b-c). The lower cap member (21) has at its upper end a joggled connection member (22) inserted under the lower end of the upper cap member (20), said connection member having such a shape that the cap members (20, 21) in the closed position of the window are placed with their exterior walls (20a, 21a) and side walls (20b-c, 21b-c) in alignment with each other, and that the lower cap member (21) when the window is opened may swing unimpededly outwards relative to the upper cap member (20).

Description: AN OPENABLE WINDOW WITH MAIN FRAME AND SASH COVERING MEMBERS The present invention relates to a roof window with a frame structure and an openable, pane supporting sash structure, both consisting of horizontal top and bottom members connected by parallel side members, the sash structure being accommodated in the frame structure as a pivot sash with a pivot axis parallel with and approximately halfway between the top and bottom members, whereby the top, bottom and side members of the frame and sash structures at least partially are designed as wood profiles which on the outwards facing sides are covered by weather-shielding covering members for sealing enclosure of the subjacent wood profiles on all surfaces protruding from the roofing, said covering members being connected with the wood profiles in the top, bottom and side members of the frame and sash structures by means of engagement and securing means which are designed in such manner and/or positioned such relative to the covering members that penetration of water and moisture into the wood profiles is substantially prevented, the covering members comprising a hood-like upper covering cap for covering the top members of the frame and sash structures, an interior glazing profile for covering a part of the upper edge of each sash side member facing the light-admitting area of the window, an exterior covering member for covering the part of each frame side member protruding from the roofing and the adjoining part of the upper edge of the frame side member, and an upper and a lower cap member overlapping the glazing profile and the frame covering member on each side of the axis of rotation, and of which the lower cap member is secured to the lower part of the sash side member, whereas the upper cap member is secured to the upper part of the frame side member or to an intermediate sash arm connected between the frame and sash members and positioned above the pivot axis. Roof windows of this type, both openable and not openable, are well known and are widely used for ensuring improved admittance of daylight when converting ceilings of buildings into rooms for accommodation and business purposes. The purpose of using weather-shielding covering members, which may consist of comparatively thin metal sheet profiles, for instance of aluminium, or plastic profiles, is to provide, as far as possible, a total exterior protection of the wood profiles in the top, bottom and side members of the frame and sash structures . In conventional embodiments of roof windows the covering members are typically secured to the wood profile members of the frame and sash structures by means of screw connections which are screwed directly into the subjacent wooden parts, which in order to obtain a sufficiently exact mounting requires pre-bored screw holes in the wooden parts and has turned out to entail a risk of moisture or water penetration into the wooden parts, in particular through the screw holes in the covering members . In openable roof windows, the covering members on the outwards facing sides of the side members of the frame and sash structures typically comprise an upper and a lower cap member in connection with the upper part of the frame side member above the pivot axis and with the lower part of the sash side member under the pivot axis such that the lower cap member may follow the swinging of the sash structure by opening of the window. In conventional windows, as known for instance from DE-A-24 43 098, it has in respect of these cap members turned out to be difficult to obtain a satisfactory sealing at the transition between the upper and lower cap members, and at the lower end of the lower cap members . The object of the invention is to provide a system of covering members for an openable roof window with a fully closed enclosure of the wooden parts of the frame and sash profiles, the above problem being at the same time solved. To meet this object, the roof window according to the invention is characterized in that said cap members are designed as flat, trough-shaped profiles with the same substantially U-shaped profile cross section comprising an exterior wall and two low side walls covering upright flange walls on the glazing profile and the frame covering member, respectively, the lower cap member having at its upper end a joggled connection member inserted under the lower end of the upper cap member, said connection member having such a shape that the cap members in the closed position of the window are placed with their exterior walls and side walls in alignment with each other, and in that the lower cap member, when the window is open, may swing unimpededly outwards releative to the upper cap member. Advantageous embodiments of the roof window according to the invention and the accompanying covering members are described in the subclaims. The invention will now be explained in detail in the following with reference to the schematic drawing, in which Fig. 1 is a perspective view of an embodiment of a roof window according to the invention, Fig. 2 is an exploded view corresponding to Fig. 1, in which the covering members have been removed from the wood profiles in the frame and sash structures of window, Fig. 3 is a schematic lateral view, partly in section, for illustration of an example of the connection between an upper and a lower cap member, Fig. 4 is a lateral view, partly in section, of the window shown in Figs 1 and 2 in an open position, Fig. 5 is a lateral view of a particular embodi- ment of the roof window as a combined top/pivot window, and Fig. 6 is a partial section of a frame side member for illustrating the fastening of frame covering members . In the embodiment shown in Figs 1 and 2, the roof window according to the invention is an openable window with a frame structure comprising a top member 1, a bottom member 2, and side members 3 and 4, and an openable sash structure with a top member 5, a bottom member 6, and side members 7 and 8. By means of swing fittings 9, known per se, between the frame and sash side members 3, 4 and 7, 8 the sash structure is pivotally journalled in the frame structure with an axis of rotation 10 parallel with the top and bottom members and substantially halfway between them. The top, bottom and side members of the frame and sash structures are for the major part built up by wood profiles which on all surfaces that are exposed to the weather are covered by covering members which, in the embodiment shown, are constituted of comparatively thin metal sheet profiles, for instance of aluminium, and which together provide a completely weather-shielding enclosure of the window. Thus the frame side members 3 and 4 are covered by elongate covering members 11 with a substantially Z- shaped cross section comprising a side wall 11a covering the upper, outwards facing side surface of the frame side member positioned outside the roofing perpendicular to the roof surface, in which the window is mounted, an upper wall lib covering the adjacent upper edge of the frame side member, and a comparatively low flange wall lie protruding from the upper wall. The frame bottom member 2 is covered by an elon- gate covering member 12 with substantially L-shaped cross section and comprising a bottom wall 12a covering the underside of the frame bottom member perpendicular to the roof surface, and an upper wall 12b covering the adjacent upper side of the frame bottom member. To establish a tight connection at the transition between the two frame side covering members 11 and the frame bottom covering member 12, the side covering members 11 are at their lowest ends provided with engagement flanges 13 in form of bent exterior parts of the side walls 11a for engagement with protruding flange members 14 from the ends of the bottom covering member 12. The frame covering members 11 and 12 are connected with their respective frame profiles 3, 4 and 2 by means of screws which are preferably screwed into the upper edges of the frame profiles, as explained in detail in the following with reference to Fig. 5. In the sash structure the top and side members are covered by an interior glazing profile 15 facing the pane area of the window and having an inwards protruding glazing profile 15a which via an intermediate sealing strip abuts the edge of the pane member 16 of the window, said pane member being typically a 2 or 3 layer sealed glazing unit. In continuation of the glazing profile flange 15a, the glazing profile 15 comprises along the edges of the double pane 16 a substantially U-shaped profile member with an upright flange wall 15b, which on the sash side members 7 and 8 follows the low flange wall lie of the covering members 11 on the frame side members 3 and 4. Correspondingly, the sash bottom member 6 is covered by a substantially L-shaped covering member 17 with a glazing profile 18 here covering the entire upper side of the sash bottom member 6, and by an underlaying wall 19 covering the underside of the sash bottom member and overlapping the covering member 12 on the frame bottom member 2. The parts of the covering members 11 and the glazing profiles 15 positioned on the top side of the frame and sash side members are on each side overlapped by the axis of rotation 10 of an upper cap member 20 and a lower cap member 21, respectively. These cap members are designed as flat, trough-shaped profiles with identical, substantially U-shaped profile cross section comprising an exterior wall 20a, 21a and two low side walls 20b, 21b and 20c, 21c covering the low upright flange walls lie and 15b on the covering member 11 and the glazing profile 15, respectively. As will be seen from Figs 2 and 3, the lower cap member 21 is at its upper end provided with a joggled connection member 22 which is inserted under the lower end of the upper cap member 20. The connection member 22 has such a shape, for instance slightly wedge-shaped as shown, that the cap members 20 and 21 in the closed position of the window are positioned in extension of one another, their exterior walls 20a and 21a and side walls 20b, 21b and 20c, 21c, respectively, in alignment. This design of the cap members 20 and 21 imparts to the window in the closed position an outer appear- ance of the window which is attractive from a design point of view, the cap members 20 and 21 appearing at each side of the window as one integral member. At the same time the joggling of the connection member 22 ensures that the lower cap member 21 secured to the sash side member 7, 8 by opening of the window as shown in Fig. 3 may follow the lower part of the sash structure during its swinging out and thus unimpededly may swing outwards relative to the upper cap member 20, which in the embodiment shown is secured to the frame side member 3, 4. As will be more clearly seen from Fig. 3, the joggled connection member 22 forms at the transition to the .cap member 21 a groove 22a providing a pressure relief chamber which prevents water from penetrating from below under the upper cap member 20. In the embodiment shown, the lower cap member 21 is manufactured by a pressing operation such that the side carriages 21b-c at the bottom are shaped in one piece with a bottom wall 21d with smooth corners. This kind of closing contributes to the attractive appearance of the window and provides a good protection of the lower parts of the sash side members 7 and 8 against the weather. The upper and lower cap members 20 and 21 are according to the invention connected with the respective frame and sash side members 3, 4 and 7, 8, respectively, such that they are easy to mount with great accuracy and moreover easy to dismount, the moisture influence on and water penetration into the wooden parts of the frame and sash side members being substantially prevented. The upper cap member 20 is thus secured by a connection member 23 at its upper end solely by an upper covering member 32 for the frame and sash top members 1 and 5 against a support member 234, which in 8 the embodiment shown is secured to the top side of the frame side member 3, 4. The lower cap member 21 is at its lowest end provided with an engagement means which in the embodi- ment shown has the shape of an engagement bracket protruding from the bottom wall 2Id and being parallel with the exterior wall 20a, said bracket having a keyhole-shaped recess 26 for engagement with and re ainment of a tap member 27 secured to the covering member 17 on the sash bottom member 6. At their opposite ends the upper cap member 20 and the lower cap member 21 are provided with securing means in the form of screw holes 28 for screws 29 to be screwed into screw fittings 30 and 31, which in the embodiment shown are connected with the frame and sash side members 3, 4 and 7,8 outside the wood profiles thereof . The screw fittings 30 and 31 may advantageously be made of plastic material and secured to those parts of the swing fitting 9 which is connected with the frame side member 3, 4 and the sash side member 7, 8, respectively. In this way it is not necessary to drive securing screws into the wooden parts of the frame and sash side members. At the top members 1 and 5 of the frame and sash structures the enclosure of the window is finished by the substantially hood-shaped top cap 32, which in the embodiment in Figs 1 - 3 is made in one piece and connected with the frame top member 1. The top cap 32 is designed such that it covers the upper parts of the covering members on the frame and sash side members 3 , 4, and 7, 8, respectively, including the upper parts of the upper cap members 20. In Fig. 5 in a schematic side view an alternative embodiment of the roof window as a combined turn/pivot window is shown, in which the sash structure under normal use is top-hung relative to the frame structure 34, such that the window, as shown in a solid line, functions as a top-hung pivot window which is opened by means of a separate control handle 35 on the interior side of the sash bottom member. To make it possible to swing the window sash approximately 180° to a convenient cleaning position, the sash structure 33 is moreover pivotally connected with an intermediate sash with sash arms 36, which in the closed position of the window are positioned between the upper parts of the frame and sash side members 2, 4 and 7, 8, respectively, and which during normal use of the window as a top-hung turning window follow the sash side members. The axis of rotation of this swingable connection lies approximately halfway between the top and bottom members in the same manner as shown in Fig. 4, and operation of the window to this pivot or swing movement is carried out in a manner frequently used in connection with roof windows by means of a ventilation and control flap 37 which releases a (not shown) locking mechanism positioned between the frame and sash top members . As this double pattern of movement entails that the upper part of the sash both during normal use as a top-hung window must be pivotable outwards relative to the frame and, at said swing movement to a cleaning position, has to be swingable inwardly relative to the frame in the same manner as shown in Fig . 4 , the upper cap member 20' which besides may be designed in the same manner as the cap member 20 in Figs 1 and 2, being at each side secured to the intermediate sash arm 36, the upper end of a bottom part 38 of the top cap connected with the intermediate sash being retained against a support member connected with the intermedi- 10 ate sash arm, whereas the lower part with a screw connection is secured to the screw fitting 30' which is connected with the part of the (not shown) swing fitting connected with the intermediate sash arm 36 between the intermediate sash arm and the sash side member 7 , 8. In the embodiment shown in Fig. 5, the top cap is also in consideration of the above moving possibilities made in two pieces, comprising the bottom part 38 connected with the intermediate sash and a top part 39 connected with the frame top member 39. The above design and mounting of the upper and lower cap members 20 and 21 provide a particular good protection of the wooden parts of the sash profiles and the other wooden parts of the frame profiles not covered by the other covering members, i.a. as a consequence of the fact that fastening screws for the caps are not screwed into the wooden parts. As shown i Fig. 6 a good protection may be obtained in respect of the screw connections between the frame side covering members 11 and the frame side members 3, 4 against water penetration into the wooden parts of the frame side members by use of a bearing bushing 40 of plastic material to be placed in a pre- bored groove 41 in the wood profile. The bearing bushing 40 has a gradually reduced cylindrical shape with a head portion 42 for receiving the bent down (by countersinking) edge area 43 of the covering member 11 around the screw hole 44 and a constricted shaft member 45 with protruding barbs 46 for retaining the bushing in the pre-bored recess 41. A hole 47 is provided in the bottom of the shaft part 47 with a smaller diameter than the securing screw, such that when the screw is driven in, a good sealing is provided. For further safeguarding of the screw connection 11 an upright collar 48 may be provided in the bottom of the head portion 42 of the bushing or several upright flaps serving as washer plate against the countersunk edge area 43 ensuring that the screw head cannot be screwed over and deform the covering member 11.

Claims: 12 P A T E N T C L A I M S 1. A roof window with a frame structure and an openable, pane supporting sash structure, both consisting of horizontal top and bottom members (1, 2; 5, 6) connected by parallel side members (2, 4; 7, 8), the sash structure being accommodated in the frame structure as a pivot sash with a pivot axis (10) parallel with and approximately halfway between the top and bottom members (1, 2; 5, 6), whereby the top, bottom and side members (1 - 8) of the frame and sash structures at least partially are designed as wood profiles which on the outwards facing sides are covered by weather-shielding covering members (11, 12, 15, 17, 20, 21, 32) for sealing enclosure of the subjacent wood profiles on all surfaces protruding from the roofing, said covering members being connected with the wood profiles in the top, bottom and side members of the frame and sash structures by means of engagement and securing means (23-29, 40) which are designed in such manner and/or positioned such relative to the covering members that penetration of water and moisture into the wood profiles is substantially prevented, the covering members comprising a hood-like upper covering cap (32) for covering the top members (1, 5) of the frame and sash structures, an interior glazing profile (15) for covering a part of the upper edge (7, 8) of each sash side member facing the light-admitting area of the window, an exterior covering member (11) for covering the part of each frame side member (3, 4) protruding from the roofing of the exterior side and the adjoining part of the upper edge of the frame side member, and an upper and a lower cap member (20, 21) overlapping the glazing profile (15) and the frame covering member (11) on each side of the axis of rotation (10) , and of which the lower cap member (21) is secured to the lower part 13 of the sash side member (7, 8) , whereas the upper cap member (20) is secured to the upper part of the frame side member (3, 4) or to an intermediate sash arm (36) connected between the frame and sash members (3, 4 ; 7,8) and positioned above the pivot axis, c h a r a c - t e r i z e d in that said cap members (20, 21) are designed as flat, trough-shaped profiles with the same substantially U-shaped profile cross section comprising an exterior wall (20a, 21a) and two low side walls (20b-c, 21b-c) covering upright flange walls (15b, lie) on the glazing profile (15) and the frame covering member (11) , respectively, the lower cap member (21) having at its upper end a joggled connection member (22) inserted under the lower end of the upper cap member (20) , said connection member having such a shape that the cap members (20, 21) in the closed position of the window are placed with their exterior walls (20a, 21a) and side walls (20b-c, 21b-c) in alignment with each other, and in that the lower cap member (21) , when the window is open, may swing unimpededly outwards releative to the upper cap member (20) . 2. A roof window according to claim 1, c h a r a c t e r i z e d in that said joggled connection member (22) on the lower cap member (21) against the lower end of the upper cap member (20) forms a pressure relieve chamber (22a) to prevent water penetration from below under the upper cap member (20) . 3. A roof window according to claim 1 or 2, c h a r a c t e r i z e d in that the lower cap member (21) is designed with a bottom wall (21d) integrally connected with its side walls (21b-c) , said bottom wall closing the cap member at the bottom. 4. A roof window according to claim 1, 2 or 3 , c h a r a c t e r i z e d in that the upper cap member (20) at its upper end is retained by said upper cove- 14 ring cap (32) , and that the lower cap member (21) at its lower end is integral with a bent, hidden engagement means (25, 26) for engagement with an engagement means (24) secured at the lower end of the sash side member (7, 8) , whereas the cap members (20, 21) at a short distance from the lower end of the upper cap member (20) and the upper end of the lower cap member (21) are provided with securing means for being secured to fittings (30, 31) in fixed connection with the frame side members (3, 4) or said intermediate sash arms (36) , respectively, and with the sash side members (7,8), but positioned outside of the wood profiles thereof . 5. A roof window according to claim 4, c h a r - a c t e r i z e d in that the engagement means at the lower end of the lower cap member (21) comprises an engagement bracket (25) parallel with the exterior wall (21a) of the cap member, said bracket being provided with a keyhole-shaped recess (26) for engagement with and securing of a pin member (27) fastened to the sash side member (7, 8) . 6. A roof window according to claim 4 or 5, c h a r a c t e r i z e d in that said securing means comprise screw holes (28) in the exterior walls (20a, 21a) of the cap members and in that said fittings are screw fittings (30, 31) for screws (29) . 7. A roof window according to claim 6, c h a r a c t e r i z e d in that said screw fittings (30, 31) are connected with a swing fitting in connection with the frame side member (3,4) or said intermediate sash arm (36) and the sash side member (7,8), respectively. 8. A roof window according to claims 3 and 5 , c h a r a c t e r i z e d in that said engagement bracket (25) is designed as a bent flange member in parallel with the exterior wall (21a) of the lower cap 15 member (21) , said flange member being connected with said bottom wall (21d) . 9. A roof window according to any of the preceding claims, c h a r a c t e r i z e d in that the exterior frame covering members (11) at their lowest ends are provided with engagement flanges (13) for sealing, positive locking engagement with protruding flange members (14) from the ends of an exterior frame covering member (12) for the frame bottom member (2) . 10. A roof window according to one of the preceding claims, in which the sash structure (33) under normal use is accommodated as a top-hung pivot window with an axis of rotation at the frame and sash top members (1', 5'), whereas said pivot axis approximately halfway between the top and bottom members (1' , 2 ' ; 5' , 6') is provided by pivotal connection of the sash side members (7', 8') to intermediate sash arms (36) with a view to making a turning of the window into a cleaning position possible, c h a r a c t e r i z e d in that the upper cap member (20') is secured to said intermediate sash arms (36) , and that an upper covering member for the top members (1', 5') is made in two pieces with a lower part (38) connected with the intermediate sash and an upper part (39) connected with the frame top member (1') . 11. A roof window according to any of the preceding claims, c h a r a c t e r i z e d in that frame covering members (11) are secured to the frame structure (3, 4) by screw connections (29) screwed into bearing bushings (40) of plastic material, said bushings being secured to the wood profiles of the frame structure 3, 4).

Inventors: HANSEN BIRGITTE, NIELSEN PETER FOSLUND, NISSEN KAJ, HANSEN, BIRGITTE, NIELSEN, PETER, FOSLUND, NISSEN, KAJ
Applicants: HANSEN BIRGITTE, NIELSEN PETER FOSLUND, NISSEN KAJ, VELUX IND AS, HANSEN, BIRGITTE, NIELSEN, PETER, FOSLUND, NISSEN, KAJ, VELUX INDUSTRI A/S
Application year: 1999
Main classification: E04D13
IPC codes: E04D13, E06B3