WO2000050722A1

WO2000050722A1 - Composite section for door or window frames

Info

Publication number: WO2000050722A1
Application number: PCT/EP2000/001475
Authority: WO
Inventors: Nicolò Ferro; Renzo Prelz
Original assignee: Osmet S.P.A.
Priority date: 1999-02-25
Filing date: 2000-02-23
Publication date: 2000-08-31
Also published as: AU2913700A; ITTS990003A1; IT1314711B1; ITTS990003A0

Abstract

A composite section comprising a heat cut barrier for a door and window frame, comprising an intermediate support section (1) of synthetic material, a metal section (2) arranged to join to an outer face of said intermediate section (1) and at least one wooden section (3) designed tJP0000862ed to an inner face of said intermediate section.

Description

COMPOSITE SECTION FOR DOOR OR WINDOW FRAMES

TECHNICAL FIELD The present invention relates to a composite section for door or window frames. BACKGROUND ART

The technique of joining an aluminum section to a wood strip in order to form door or window frames has long been known. The metallic section constitutes the external part of a door or window frame, whereas a wood strip constitutes the internal part thereof. One takes then advantage of weatherability and wet sealing features of aluminum and the look and thermal insulation of wood.

The metal can be fixed to the wood in various manners, e.g. by means of joints constituted by laminar sections provided with wings, teeth or other holding means to be locked or glued to the metal section and the wood. Since said joints are made of insulating material, they have also the function of reducing heat transmission and increasing soundproofing of the door or window frames. In some cases, the joint arms extend to such an extent as to fully cover the space between wing frame and casing, thereby considerably reducing condensation problems. A particularly interesting joint is that made available on the market by the German company Hoogovens, which is constituted by a PVC section which is used only for the wing and instead of being laminar is tubular in shape. On the faces facing inwards and outwards of the door or window frame there are provided said holding means for interlocking the aluminum to the wood, whereas on its internal radial face an arm supports the glass pane. Said tubular section ensures an extensive heat cut and thus its performance in terms of heat transmission rate is optimum.

When using a laminar joint or a tubular joint, the metal section, the wood and the joint itself form a monolithic unit. The rigidity of the complex section thus formed is such that any expansion of the metal is transmitted to the wood with undesired consequences: unaesthetic cracks between the various wood strips at the corners of the door or window frame or warping of the strips. Water can thus seep into said cracks, which subsequently results in bad parts being formed. Fittings and accessories sometimes extend through said joints and are fixed at their end to the metal, and thus bad parts might be a source of trouble in terms of interruption of the heat/acoustic cut, possible formation of condensation, etcetera.

SUMMARY OF THE INVENTION The main object of the present invention is to provide a composite section being an improvement over the known joints.

Another object of the present invention is to provide users with sections for door or window frames in which an internal element can be easily replaced without requiring structural modifications in the basic section. These and other objects are achieved by a composite section with heat cut for door or window frames according to the invention, which comprises an intermediate support section made of synthetic material and having a tubular cross-section, a wooden section joined to one face facing outwards of said intermediate section, and a metal section acting as reinforcement and joined to another face of said intermediate section.

Various finishing materials, such as sections made of metal, synthetic material, wooden strips etcetera, can be applied to the face facing inwards of the door or window frame. The intermediate section of synthetic material can be divided, by internal rib walls, into two or more spaces, thereby obtaining better heat insulation and stiffening of said section of synthetic material.

The wall of the synthetic material section facing outwards of the door or window frame has at least two wings provided with locking teeth which are designed to engage with respective holding means provided in the metal section, thereby mutually interlocking the two profiled elements. The surface of the synthetic material section facing inwards of the door or window frame has at least two wings provided with retention teeth. Said teeth and/or wings fit in suitably provided longitudinal channels formed in the wooden strip or engage corresponding teeth and/or wings formed in the section made of metal, synthetic material and the like that constitutes the internal portion of a door or window frame. Said wall and/or its wings has/have inclined planes which force the intermediate section of the door or window frame to be intensely compressed against the synthetic material section. The inner and outer radial faces of the synthetic material section also have variously shaped wings. Depending on whether the synthetic material section forms the wing frame or the casing, the teeth provided on said wings act as a securing means to a pane retaining support or to an open-joint sealing gasket. The connection of the internal finishing elements to the assembly constituted by the synthetic material section-metal section can be performed in two ways: by compression and snap action or by longitudinal insertion and subsequent locking by means of a sealing gasket inserted by compression. The latter sealing gasket is provided with wings or other longitudinally extending resilient elements which can be transversely compressed.

The inner wood or the metal or synthetic material section, owing to said elastic sealing gasket, can slide longitudinally on the assembly constituted by the synthetic material section-metal section. This lack of rigidity prevents the expansions externally affecting the metal from being transmitted to the wood, which results in undeniable advantages.

The elastic gasket can also act as an abutment gasket. The ease with which it can be removed from its seat makes it possible to interchange the finishing materials easily and above all without requiring structural modifications in the basic profile. The fittings and accessories are secured to the intermediate tubular section and thus without breaking the thermal/acoustic barrier and the possibility of condensation being formed.

The resulting assembly constituted by the section of synthetic material and the metal section can be used to form both the wing frame and the casing. Production and assembling costs are thus reduced significantly, however, without affecting the performance of the door or window frame. Indeed, said door or window frame has a low heat transmission rate and high soundproofing. The external radial wall of the intermediate section delimits a chamber provided between the wing frame and the casing, thereby minimizing condensation problems.

BRIEF DESCRIPTION OF THE DRAWINGS

Further features and advantages of the present invention will become better apparent from the following description of a preferred, not exclusive, embodiment of a three-part section for door or window frames according to the invention, illustrated only by way of non-limitative example in the accompanying drawings, wherein:

Figure 1 is a cross-sectional view of an intermediate tubular section according to the invention; Figures 2, 3 and 4 are perspective views of different types of elastic gaskets;

Figure 5 is an exploded cross-sectional view, in a different scale, of the components that form the wing frame of a door or window, the internal part of said door or window frame comprising two wooden strips or two sections of metal or synthetic material;

Figure 6 is an exploded cross-sectional view of the elements that form the casing for a door or window frame; its internal part is constituted by a wooden strip or a metal section or a section of synthetic material;

Figure 7 is a cross-sectional view of the wing frame of Figure 5; in this case, wooden strips have been used in its internal part; Figure 8 is a cross-sectional view of the casing of Figure 6, whose internal part is constituted by a wooden strip;

Figure 9 is a cross-sectional view of an assembly formed by the wing frame and the casing of Figures 7 and 8; Figure 10 is a cross-sectional view of an assembly formed by a wing frame and a casing whose internal part is constituted by metal sections;

Figure 11 is a cross-sectional view of a node formed by a wing frame and a casing whose internal part is constituted by sections of synthetic material;

Figure 12 is a cross-sectional view of an assembly formed by a wig frame and a casing whose internal part is constituted by metal sections provided with differently shaped interlocking elements arranged to engage with the intermediate section; and

Figure 13 is a cross-sectional view of an assembly formed by a wing frame and a casing whose internal part is constituted by sections of synthetic material provided with interlocking elements arranged to engage with the intermediate section.

DESCRIPTION OF A PREFERRED EMBODIMENT

With reference to Figures 1 to 9, the three-part section according to the invention is formed by a tubular section 1 of synthetic material, a metal section 2 and at least one wooden strip 3. The section 1 of synthetic material constitutes the intermediate part of a door or window frame, whereas the metal section 2 constitutes an external part thereof.

Section 1 of plastic material and metal section 2 have the same transverse profile both in the wing frame and the casing. More particularly, the plastics section 1 is quadrangular in cross-section.

Its face directly opposite the face of the metal section 2 has two wings 1.1, each of which is shaped, at its free end as a locking tooth. The two locking teeth are perfectly symmetrical and extend in opposite directions.

The wings 1.1 are designed to be received in two longitudinal channels 2.1 formed in the face of the metal section 2 facing, in use, inwards a door or window frame. The channels 2.1 are delimited by an inner wall of the metal section 2, which is shaped as a double S, with two side wings 2.2 arranged at the ends of said wall. Wings 2.2 also constitute an inward extension of an internal radial wall 2a and of an external radial wall 2b of the metal section 2. Each wing 2.2 is shaped as a locking tooth. The two locking teeth are perfectly symmetrical and extend in opposite directions. The arrangement of the teeth of the plastics section 1 and of the metal section 2 is such as to allow them to interlock with one another to obtain a stable coupling. The metal section 2 is also provided with an extension 2.3 which extends at right angles with respect to the walls 2a and 2b and has two locking teeth 2.4 arranged to lock in position a pane retention gasket 4 or an external abutment gasket 5.

Coupling between a plastics section 1 and the metal section 2 occurs by compression interlocking. The assembly constituted by the plastics section 1 and the metal section 2 forms a stable coupling, in which the plastics section 1 is the supporting member and the metal section 2 is a reinforcement member. The assembly constituted by the plastics section 1 and the metal section 2 can be used to form both the wing frame and the casing. On a wall la facing toward the inside of the door or window frame and on internal radial walls lb, lc of the plastics section 1 there are provided attachments for the engagement of said assembly with other members of composite section.

The wall la facing towards the inside of the door or window frame has two wings 1.2, 1.3. The wing 1.2 is an extension of the internal radial wall lb of the plastics section 1 towards the inside of the door or window frame and has, at its free end, an outwardly extending locking tooth 1.4 and a toothed surface 1.5 facing away from the locking tooth 1.4. Close to said locking tooth 1.4 there is provided a tooth 1.6 which is directed radially outwards. An approximately Z-shaped wing 1.3 extends from the inner wall la and has an intermediate inwardly extending tooth 1.7 and a second inclined- plane tooth 1.8 arranged at a more remote position towards the inside of a door or window frame. Finally, on the inner face la of the plastics section 1 there is provided a further tooth 1.9 which is directed toward the inside the door or window frame and has an inclined surface. Another inclined surface 1.10 is provided at the base of the tooth 1.7 and is facing towards the outside of the door or window frame. Two wings 1.11 and 1.12 are provided on the internal radial wall lb.

Each wing has a locking tooth at its end. The wing 1.11 is located approximately in an intermediate position, while the wing 1.12 constitutes an extension directed toward the outside of the door or window frame. The two locking teeth 1.11 and 1.12 are opposite to one another. The plastics section 1 is divided into chambers or spaces by an internal wall 1.13 which is arranged proximate to an outer wall Id of the plastics section 1.

The function of the teeth of the plastics section 1 that are provided on the wall la that is directed toward the inside of the door or window frame and on the internal radial wall lb, depends upon whether said section is part of the wing case or of the casing.

In the wing case there are two wooden strips 3: a radially outermost 3a and a radially innermost 3b. When the assembly constituted by the plastics section 1 and the metal section 2 constitutes a wing frame, the locking tooth 1.4 of the wing 1.2 and the locking tooth 1.7 of the wing 1.3 engage within two longitudinal channels 3.1 and 3.2, respectively, provided on the outer face of the wooden strip 3a.

The tooth 1.6 of the wing 1.2 and the teeth 1.7, 1.8 of the wing 1.3 instead engage within longitudinal channels 3.3, 3.4, 3.5, respectively, formed in internal radial face of the wooden strip 3b and in its face facing towards the outside of the door or window frame.

First, the radially outermost wooden strip 3a is longitudinally fitted onto the plastics section 1. Then a gasket 6 is inserted and compressed between the toothed surface 1.5 of the wing 1.2 and the internal radial face of said wooden strip 3. The gasket 6 is provided with longitudinal lips 6.1 and by being resilient locks the wooden strip 3 onto the plastics section 1.

The inclined surface provided on the tooth 1.9 pushes the wooden strip 3 towards the inside of the door or window frame thereby forcing it to adhere strongly to the teeth 1.5, 1.6 of section 1. The inclined surface 1.10 and the inclined surface provided on the tooth 1.8 urge, instead, the wooden strip 3 toward the outside of the door or window frame, thereby forcing it to join the wing 1.3. The radially innermost wooden strip 3 is subsequently fitted longitudinally onto the plastics section 1 and locked in position by means of a second pane holding gasket 7 arranged between the wooden strip 3 and a glass pane or double glazing 8.

The locking tooth 1.12 located at the end of the wing 1.12 is arranged instead to engage with a respective tooth 8.1 which is a component of a pane support 8.2.

Even if the assembly constituted by the plastics section 1 and the metal section 2 is designed to form the casing, the tooth 1.6 of the wing 1.2 and the teeth 1.7, 1.8 of the wing 1.3 engage with longitudinal channels 3.3, 3.4, 3.5, respectively, provided on the internal radial face and on the face of the wooden strip 3 that is directed towards the outside of the door or window frame. Said wooden strip has the same profile as the radially outermost strip of the wing case.

The wooden strip 3 is longitudinally fitted onto the plastics section 1. In this case also, in order to lock the wood onto the assembly constituted by the plastics section 1 and the metal section 2, a resilient gasket 9 is used which is provided with longitudinal lips 9.1 and is inserted between the toothed surface 1.5 of the wing 1.2 and the internal radial face of the wooden strip 3. The presence of inclined surfaces formed on the plastics section 1 causes the wooden strip 3 to become compressed against said plastics section 1.

The two locking teeth provided at the ends of the wings 1.11 and 1.12 are designed to lock the open-joint gasket 10 in the casing.

If necessary, the wooden strips 3 can be replaced totally or in part by metal sections 11 (as shown in Figures 5, 6, 10 and 12) or plastics section 12 (as shown in Figures 5, 6, 11 and 13). In this case, it is sufficient to remove the gaskets 6, 7 and 9, without further modifying the other components of the door or window frame. The metal sections 11 and the plastics sections 12 can also be locked onto the plastics section 1 by snap engagement.

The three-part profiled element described above is susceptible to numerous modifications and variations within the scope of the invention. The engagement between the plastics section 1 and the metal section 2 can be of a different type.

The gaskets can also be shaped so as to act as an abutment gasket 13 (Fig. 4).

The disclosures in Italian Patent Application No. TS99A000003 from which this application claims priority are incorporated herein by reference.

Claims

1. A composite section comprising a heat cut barrier for a door and window frame, comprising an intermediate support section (1) of synthetic material, a metal section (2) arranged to join to an outer face of said intermediate section (1) and at least one wooden section (3) designed o be joined to an inner face of said intermediate section.

2. The composite section as claimed in claim 1, characterized in that said intermediate support section (1) is tubular in cross-section and has a pair of wings (1.1) formed on one side thereof facing outwards and terminating with a respective locking tooth arranged to engage with said metal section

(2).

3. The composite section as claimed in claim 2, characterized in that the said metal section (2) comprises locking means (2.2) for said wings (1.1).

4. The composite section as claimed in any claim 2 or 3, characterized in that said intermediate support section (1) has a first and a second wings (1.2,

1.3) formed on its other side facing inwards and provided with interlocking means for engaging with said wooden section (3).

5. The composite section as claimed in claim 4, characterized in that said interlocking means comprises a locking tooth (1.4), a toothed portion (1.5), a tooth (1.6) on said first wing (1.2) and locking teeth (1.7, 1.8) on said second wing (1.3).

6. The composite section as claimed in claim 5, characterized in that said wooden section (3) has recesses (3.3, 3.4, 3.5) for receiving a respective tooth (1.6, 1.7 and 1.8) of said intermediate section (1). 7. The composite section as claimed in any previous claim 4 to 6, characterized in that said intermediate support section (1) has a third and a fourth wings (1.11 and 1.12) extending transversely from a radial wall (lb) thereof and each having a respective at least one locking tooth.

8. The composite section as claimed in claim 7, characterized in that said wooden section (3) comprises two separate portions (3a, 3b), its portion (3a) having recesses (3.1, 3.2) arranged to engage with said locking teeth of said radial wall (lb) of said intermediate section (1).

9. The composite section as claimed in claim 7, characterized in that said third and fourth wings (1.11, 1.12) are arranged to engage with a metal or synthetic material section (12).

10. The composite section as claimed in claim 7, characterized in that at least one wing (1.11, 1.12) is arranged to engage with a double glazing or glass panel support.

11. The composite section as claimed in any claim 7 to 10, characterized in that the said third and fourth wings (1.11, 1.12) are designed to locate a joint gasket (10).

12. The composite section as claimed in any previous claim, characterized in that it comprises at least one gasket (6, 9, 13) between said intermediate section (1) and said wooden section 3. 13. The composite section as claimed in claim 12, characterized in that said gaskets (6, 9, 13) have a pair of longitudinal lips (6.1, 9.1, 13.1) at least one of which is provided with toothing.

14. The composite section as claimed in claim 5 to 13, characterized in that said locking teeth (1.6, 1.7 and 1.8) comprise an inclined-plane portion to obtain a tightened engagement between said intermediate section (1) and said wooden or said metal sections (3,12).

15. The composite section as claimed in any previous claim, characterized in that said metal section (2) has an extension (2.3) having at least two teeth (2.4) for locating a gasket (4, 5). 16. The composite section as claimed in any previous claim, characterized in that a gasket (7) is provided between said wooden section (3) and a metal section (11) or a section (12) of synthetic material and a double glazing or glass panel (8). AMENDED CLAIMS

[received by the International Bureau on 26 July 2000 ( 26.07.00) ; new c l aims 1 and 2 added ; original cl aims 2- 16 amended and renumbered as cl aims 3-17 ; ( 3 pages ) ]

1. A composite section comprising a heat cut barrier for a door and window frame, comprising an intermediate support section (1) of synthetic material, a metal section (2) arranged to join to an outer face of said intermediate section (1) and at least one wooden section (3) designed to be joined to an inner face of said intermediate section, characterized in that said intermediate section (1) and said metal section (2) have such a configuration so as to form mutually matching assemblies for both a wing frame and for a casing, in which said intermediate (1) and metal sections (2) are identically assembled and stably coupled, by compression, to each other.

2. The composite section of claim 1, characterized in that said wooden section (3) has such a configuration so as to adapt to both said wing frame and casing, intermediate and metal section assemblies.

3. The composite section as claimed in claim 1, characterized in that said intermediate support section (1) is tubular in cross-section and has a pair of wings (1.1) formed on one side thereof facing outwards and terminating with a respective locking tooth arranged to engage with said metal section (2).

4. The composite section as claimed in claim 3, characterized in that the said metal section (2) comprises locking means (2.2) for said wings (1.1).

5. The composite section as claimed in any of the claims 3 or 4, characterized in that said intermediate support section (1) has a first and a second wings (1.2, 1.3) formed on its other side facing inwards and provided with interlocking means for engaging with said wooden section (3).

6. The composite section as claimed in claim 5, characterized in that said interlocking means comprises a locking tooth (1.4), a toothed portion (1.5), a tooth (1.6) on said first wing (1.2) and locking teeth (1.7, 1.8) on said second wing (1.3).

7. The composite section as claimed in claim 6, characterized in that said wooden section (3) has recesses (3.3, 3.4, 3.5) for receiving a respective tooth (1.6, 1.7 and 1.8) of said intermediate section (1).

8. The composite section as claimed in any of the claims 5 to 7, characterized in that said intermediate support section (1) has a third and a fourth wings (1.11 and 1.12) extending transversely from a radial wall (lb) thereof and each having a respective at least one locking tooth.

9. The composite section as claimed in claim 8, characterized in that said wooden section (3) comprises two separate portions (3a, 3b), its portion (3a) having recesses (3.1, 3.2) arranged to engage with said locking teeth of said radial wall (lb) of said intermediate section (1).

10. The composite section as claimed in claim 8, characterized in that said third and fourth wings (1.11, 1.12) are arranged to engage with a metal or synthetic material section (12).

11. The composite section as claimed in claim 8, characterized in that at least one wing (1.11, 1.12) is arranged to engage with a double glazing or glass panel support.

12. The composite section as claimed in any of the claims 8 to 11, characterized in that it further comprises a joint gasket (10), the said third and fourth wings (1.11, 1.12) being shaped so as to locate said joint gasket (10).

13. The composite section as claimed in any of the preceding claims, characterized in that it comprises at least one gasket (6, 9, 13) between said intermediate section (1) and said wooden section 3.

14. The composite section as claimed in claim 13, characterized in that said gaskets (6, 9, 13) have a pair of longitudinal lips (6.1, 9.1, 13.1) at least one of which is provided with toothing.

15. The composite section as claimed in claims 6 to 14, characterized in that said locking teeth (1.6, 1.7 and 1.8) comprise an inclined-plane portion to obtain a tightened engagement between said intermediate section (1) and said wooden or said metal sections (3,12).

16. The composite section as claimed in any of the preceding claims, characterized in that said metal section (2) has an extension (2.3) having at least two teeth (2.4) for locating a gasket (4, 5).

17. The composite section as claimed in any of the preceding claims, characterized in that a gasket (7) is provided between said wooden section (3) and a metal section (11) or a section (12) of synthetic material and a double glazing or glass panel (8).