GB2136039A - Door structure - Google Patents

Abstract

A door (10) comprises a hardwood frame (13) having at least one opening for a panel (16, 17), supported by aluminium glazing sections (18) covered by cladding (21) of wood or a plastics material to reduce heat transfer through the door. <IMAGE>

Description

SPECIFICATION Door structure This invention relates to doors and in particular to doors comprising a wooden frame structure with one or more panels secured therein. Such panels may also be of wood but more particularly may be of glass.

In recent years there has been increasing use ol aluminium or the like material in the manufacture of doors, particularly glazed doors, and window frames. The sections involved are readily extruded and easily joined to form the required door or window frame structure. Such sections also readily allow the insertion of the glazing panels and in addition present a neat and pleasing appearance and provide freedom from warping, swelling and maintenance requirements. However doors and window frames of aluminium and the like readily conduct heat and in consequence suffer the drawbacks of heat loss from the interior of a building to the outside atmosphere and also condensation on the internal surfa,ces of the door or window frame.To overcome these drawbacks there has been proposed the cladding of the internal and/or external surfaces of the metal doors or window frames with a thermally poor conducting material such as wood or a plastics material. It is also known to provide that the door or window frame structure is of a sandwich formation, a layer of thermally insulating material being secured between inner and outer layers of aluminium. However, such solutions lead to doors and window frames which involve increased manufacturing time, and are therefore relatively costly, to produce.

It is an object of the present invention to provide a door having the advantages but not the disadvantages referred to above to as great an extent as possible.

The invention provides a door comprising a wooden frame structure defining at least one opening therein for a panel, an elongate metallic member or members extending around the periphery of said opening and retained in said wooden frame, said member or members being adapted to retain a panel in said opening and having, abutting the or each surface otherwise exposed inwardly or outwardly of said door, a member or members of a thermally insulating material.

The doo'r may be provided with two openings for panels, in which case a mid-rail of said door may comprise two spaced metallic members, eaci of which is secured at its ends to the metallic members extending around the peripheries of said openings. A single thermally insulating member may abut the surfaces of both of said spaced metallic members which would be otherwise exposed inwardly or outwardly of said door.

Said thermally insulating member or members may be provided by a member or members of said wooden frame. Alternatively said thermally insulating member or members may be provided by cladding of wood or of a plastics material secured to said metallic member or members at said surface or surfaces.

Preferably the metallic member or members is or are of aluminium or an alloy thereof, in which case the member or members may be an extruded section.

The invention will now be further described with reference to the accompanying drawings in which: Figs. 1 and 2 show outer and inner elevations respectively of one embodiment of doer ~~ Fig. 3 is a cross sectional view of on line Ill-Ill of Fig. 2, Fig. 4 is a cross-sectional view on IV-lV of Fig.

2, and Fig. 5 is a sectional plan view of part of a patio door arrangement.

Referring now to Figs. 1 and 2 there is shown a door 10 having a wooden frame structure comprising top rail, bottom rail and jamb members 1 1, 12 and 13 respectively. The top rail and bottom rail members 1 1, 12 have mortices formed therein at each end thereof into which fit tenons 14 formed at the ends of the stile members 13.

The tenons 14 may be secured in the mortices bybeing pressed therein and/or by an adhesive. In this way a rigid frame is provided, which preferably is of a hardwood.

A mid-rail 15 extends across the door 10 so as to define, with the top rail, bottom rail and jambs 1 1, 12 and 13, two openings for panels 16, 17.

The panels 16, 17 may be of any suitable material such as wood, for example plywood or blockboard, but preferably at least the upper panel 1 6 is of glass. It is preferred that both panels 16, 17 are double glazed panels. The panels 16, 17 are retained in the openings by means of glazing sections 18 and glazing beads 19 of aluminium or an alloy thereof. The mid-rail 1 5 comprises two spaced transoms 20 of like material to the glazing sections 18 and beads 19, the transoms 20 being secured to the upright glazing sections 18 which are themselves secured to the jambs 13. In this way the glazing sections 18 and the transoms 20 form a rigid structure which will resist any warping of the wooden frame of door 10.

To the outside of the door 10 the glazing sections and beads 18, 19 and transoms 20 have their otherwise exposed surfaces covered by cladding 21, 22. In this way loss of heat through the glazing sections and beads and transoms 18, 19, 20 is kept to a minimum and the formation of condensation on the inner surface of the glazing sections and beads and transoms 18, 19, 20 is prevented or substantially reduced. Preferably the cladding 21, 22 is of the same material as the frame of door 10 so that an appearance of continuity is presented.

In Fig. 3 the section through a jamb of door 10 is shown. The jamb 13 is a planed section, preferably of hardwood. The aluminium glazing section 18 has a flange 23 which is received in a slot 24 of jamb 13 and the section 18 is secured to jamb 13 by screws 25 which pass through a spacing block 26. Cladding 21, also of hardwood,., overlies the outwardly facing flange 27 of glazing section 18 and is screwed thereto, the cladding 21 also overlying a corner rebate 28 of jamb 13. A gasket 29 of T-shaped cross-section is secured between cladding 21 and flange 27 so as to prevent the ingress of water therebetween, the gasket 29 preferably being of rubber or a suitable plastics material. Glazing bead 19 secures the double glazing panel 17 in the glazing section 18.

In Fig. 4 the section through the mid-rail 15 is shown. A single classing member 22 extends over the flanges 27 of both transoms 20, gaskets 29 being secured therebetween as described above.

At the inside of the door the space between transoms 20 is filled by an infil panel 30, preferably also of wood, which is secured by glazing beads 1 9 in similar manner to glazing panels 16, 17. An aperture, (not shown) may extend through cladding 22 and infil panel 30 to form å letter-box if desired, which may be provided with an aluminium surround and cover to match the glazing sections and beads 18, 19.

Referring now to Fig. 5 there is shown a patiodoor arrangement comprising a sliding door 50 and part of a fixed door 51. The fixed door 51 may be the left side of a patio door arrangement having one fixed and one sliding door, or may be a centrally disposed fixed door panel of a patio door arrangement having one fixed door and two sliding doors. In the latter case the left hand sliding door would be the mirror image of the sliding door 50 shown in Fig. 5. The construction of the jambs of sliding door 50 and fixed door 51 is substantially the same as that of door 10 as shown in Fig. 3 and described in relation to that Figure, and corresponding parts have been designated with the same numerals. Seals 52 are provided on the abutting jambs 13 of doors 50, 51 so as to interengage and prevent the ingress of water and draughts to the interior of the property.

The outermost jamb 13 of sliding door 50 is morticed for a lock and has interleaving formations at 53 for cooperation with corresponding formations 54 provided on the frame 55 of the patio door arrangement. Such formations provide for prevention of water and draught ingress between the door 50 and the frame 55 and also provide an obstacle to the insertion of rods or the like for the purpose of forcing open the door 50.

Claims (21)

1. A door comprising a wooden frame structure defining at least one opening therein for a panel, an elongate metallic member or members extending around the periphery of said opening and retained in said wooden frame, said member or members being adapted to retain a panel in said opening and having, abutting the or each surface otherwise exposed inwardly or outwardly of said door, a member or members of a thermally insulating material.

2. A door according to claim 1, wherein said door comprises two openings for panels.

3. A door according to claim 2, wherein a midrail of said door comprises two spaced metallic members.

4. A door according to claim 3, wherein each of said spaced metallic members is secured at its ends to the metallic members extending around the peripheries of said openings.

5. A door according to claim 3 or claim 4, wherein a single thermally insulating member abuts the surfaces of both spaced metallic members which would be otherwise exposed inwardly or outwardly of said door.

6. A door according to any one of claims 1 to 5, wherein the or each said thermally insulating member is provided by a member or members of said wooden frame.

7. A door according to any one of claims 1 to 5, wherein the or each said thermally insulating member is provided by a cladding of wood secured to said metallic member or members at said surface or surfaces.

8.-A door according to any one of claims 1 to 5, wherein the or each said thermally insulating member is provided by a cladding of a plastics material secured to said metallic member or members at said surface or surfaces.

9. A door according to any one of claims 1 to 8, wherein the or each said metallic member is of aluminium or an alloy thereof.

10. A door according to claim 9, wherein the or each said metallic member is an extruded section.

11. A door according to any one of claims 1 to 10, wherein said frame structure is of a hardwood.

12. A door according to any one of claims 1 to 11, wherein said frame structure comprises a top rail, a bottom rail and two jamb members, said rails being secured to said jambs by means of mortice and tenon joints.

13. A door according to claim 12, wherein the joints are additionally secured by an adhesive.

14. A door according to any one of claims 1 to 13, comprising at least one panel mounted in a respective opening, said at least one panel comprising glazing.

15. A door according to claim 14, wherein said glazing is mounted in said opening by means of glazing beads which engage said elongate metallic members extending around said opening.

16. A door according to claim 14 or claim 15, wherein said panel comprises a double glazed panel.

17. A door assembly comprising at least one door according to any one of claims 1 to 1 6.

18. A door assembly according to claim 17, wherein said at least one door is slidably mounted in a door frame.

19. A door assembly according to claim 18 comprising at least one fixed door.

20. A door substantially as hereinbefore described with reference to and as illustrated in Figs. 1 to 4 or Fig. 5 of the accompanying drawings.

21. A door assembly substantially as hereinbefore described with reference to and as illustrated in Fig. 5 of the accompanying drawings.