EP3140485B1 - Composite profile for doors, windows or façade elements - Google Patents

Description

The present invention relates to a composite profile for doors, windows or facade elements according to the preamble of claim 1.

Such composite profiles for doors, windows and other facade elements are known from the prior art. So will in the DE 20 2013 105 101 U1 discloses a composite profile that has a first and a second metallic outer profile, each with at least one hollow chamber. A middle profile made of a metallic material is arranged between the two outer profiles. The metallic central profile is connected to the first outer profile via one or more spaced insulating bars and to the second outer profile also via at least one or more spaced insulating bars, so that good thermal insulation is achieved and relatively long protection against flame transmission in the event of a fire is achieved.

A preferred - but not mandatory - field of application of such composite profiles, which have more than two metallic profile sections, is the use as door profiles in the interior of buildings with special fire protection requirements.

Another prior art according to the preamble of claim 1 is disclosed in the EP 0 262 677 A2 .

In the case of composite profiles for doors, windows or facade elements with insulating bars, shear stresses occur between the components of the composite profile when the temperature increases or decreases on one side, as occurs with seasonal changes. Due to the shear strength of the composite profile structure, the shear stresses result in deformations of the composite profile, resulting in a curvature towards the warmer side of the composite profile. Such deformations can impair the function of the door or window frame constructed from the composite profile.

The temperature-related deformation of the composite profiles has a negative effect on the function of the seals and locking systems, particularly in the case of relatively long composite profiles that are used as door frame members.

Solutions are known from the prior art that deal with the avoidance or mitigation of such stresses or deformations of composite profiles. So will in the EP 0 829 609 A2 proposed that in an insulating bar with which an inner and an outer profile are connected, the shear strength is low, approaches zero or a sliding guide is present.

After DE 20 2007 004 804 U1 an insulating strip has at least two or more insulating strip sections or parts that can be moved relative to one another and are connected to one another via webs, the webs being designed in such a way that the two insulating strip parts of the insulating strip can be moved relative to one another to a limited extent in such a way that adjacent webs and the insulating strip parts can be pivoted into a parallelogram shape during movement.

In the DE 10 2013 204 693 A1 It is proposed to design an insulating web consisting of two slidably connected sections, which is used to connect two metal profiles of a thermally insulated composite profile, in such a way that the insulating web has intermittent means or means provided over a greater length of the insulating web to produce a locally shear-resistant, but overall in the Shear strength has reduced connection between the two sections of the insulation web, so that a compensation of dilation movements is also possible here.

A disadvantage of the solutions of the prior art is that a relatively low moment of inertia results from a shear-flexible or shear-free design of the insulating strips between the profiles.

As a result, the permissible static loads for a composite profile based on the state of the art with non-shearing or shear-resistant insulating bars are to be assumed to be smaller than for composite profiles with shear-resistant insulating bars. This results in a disadvantage when using such composite profiles, for example in glass facades but also for large-format windows or doors, so that with the same static requirements compared to a composite profile with shear-resistant insulating bars, a more spacious composite profile with drawerless or shear-resistant insulating bars can be used.

As a result, a composite profile with non-shearing or shear-resistant insulating bars results in a smaller glazing area and less incidence of light than a composite profile with shear-resistant insulating bars with the same wall opening area. In addition, the thermal insulation properties of the composite profiles with shearless or shear-flexible insulating strips according to the prior art are poorer than those of such composite profiles according to the prior art which have more than two metallic profile sections.

The invention therefore has the object of specifying a generic composite profile for doors, windows or the like, which at least reduces these problems.

The present invention solves this problem by the subject matter of claim 1. According to claim 21, the invention also provides a window or a door or a facade element with at least one or more composite profiles according to the claim relating thereto. Advantageous refinements of the invention are specified in the dependent claims.

According to the characterizing part of claim 1, it is provided that the two insulating strip zones have different shear strengths orthogonally to the cross-sectional plane of the composite profile. This can be achieved in particular by creating a shear-resistant connection between all of the elements connected to one another in the first insulating strip zone (this includes one-piece insulating strips or multi-part insulating strips with their insulating strip sections and the adjoining metal profiles, i.e. the middle metal profile and the associated outer metal profile or outer profile) is provided or designed, whereas in the second insulating strip zone the shear strength of the elements connected to each other in the second insulating strip zone (insulating strips, metal profiles or insulating strip sections) is in any case partially or in sections lower than in the first insulating strip zone.

The invention creates such a composite profile for doors, windows or the like, which ensures deformation of the profile under the influence of temperature due to different shear strengths of the insulating strip zones and preferably in particular a shear-free or shear-flexible design of an insulating strip zone. This results in a surprisingly high rigidity of the composite profile despite the reduced shear design of one of the two insulating bar zones.

The reduction in shear strength in one of the two insulating bar zones can be implemented in various ways. Reference should first be made to the essential basic principles of reduced shear strength EP 0 829 609 A2 . Variants of the thought of this writing show the DE 10 2004 038 868 A1 , the DE 10 2013 204 693 A1 the EP 1 004 739 B1 and the DE 199 62 964 A1 . The zone with reduced shear strength can be designed as in these documents. So it can be designed as a sliding guide, which is formed between the insulating profile and one or both adjacent metal profiles. However, the sliding guide can also be formed between two insulating profile sections. The friction in the sliding guide does not have to be close to zero. It can even be increased again locally in the area of the sliding guide by means of creating shear strength, but the shear strength here should be lower overall over the length of the composite profile (based on a unit length, e.g. 1 m) than in the other insulating strip zone.

The two insulating bar sections can also consist of different materials and/or be connected to one another with limited mobility via transverse bars or the like. Combinations of these measures and other shear-reducing measures relative to a shear-resistant connection are also conceivable.

In the second insulating bar zone, the shear strength is higher than in the other insulating bar zone. This connection is preferably even shear-resistant, ie within the meaning of this document, suitable measures and means are used to prevent relative movement of the elements to be connected in the insulating strip zone "insulating strips" or "Bar sections or parts" and "metal profiles" prevented in this zone as a result of expansion. This can easily be achieved by rolling metal profile webs onto the heads or end sections of the insulating strips and by additional measures such as wires with variable thickness in the longitudinal direction or a knurled wire or the like in the rolling area. In the sense of this document, on the other hand, a shear-free bond - occasionally also referred to as a shear-flexible bond - allows a relative movement of the adjoining elements "insulating strips" or "insulating strip sections or parts" and "metal profiles" in this insulating strip zone that are to be connected to one another as a result of dilatation in any case limited to. In an advantageous embodiment variant, the composite profile has one or more insulating bars that have thickened end sections, wherein the respective end section can have a trapezoidal or triangular or wedge-shaped or L-shaped cross section and the respective end section engages in a groove of a metal profile.

In an advantageous embodiment variant, the insulating bars of the composite profile have an end section for realizing a type of sliding guide, which has a substantially welt-like cross section, which engages in a groove of a metal profile. In a further advantageous embodiment variant, the insulating bars of the composite profile are made of two insulating bar sections or parts, the two parts of the insulating bars being positively connected to one another in the direction of cross-sectional expansion of the composite profile by a piping connection. This also serves to implement a sliding guide. The keder connection has a keder bead and a keder flap, which engages in a groove with a corresponding cross-sectional geometry.

This creates a simple and therefore advantageous connection between the insulating bars and the metal profiles or within an insulating bar that is form-fitting but slide-guide-like in the direction of cross-sectional expansion of the composite profile, which can be easily and advantageously further developed into an almost "pull-free" connection, depending on the requirement, by means of friction-minimizing means .

It is particularly advantageous if the friction-minimizing means can be applied easily, as is the case with a co-extruded film that is applied to the welt bead of the welt connection. The film of the co-extruded film, which is connected to the groove, has a particularly low coefficient of friction in this case, so that a connection that is virtually shear-free in a direction orthogonal to the cross-sectional plane of the composite profile is created. In a further advantageous embodiment of the present invention, the composite profile has at least one or more hollow chambers, with at least one thermal insulation strip being inserted into one or more of these hollow chambers. As a result, the thermal insulation properties of the composite profile are improved even further in a simple and advantageous manner.

In a further advantageous embodiment, fire protection strips are arranged in place of the thermal insulation strips or additionally in other hollow chambers. As a result, the fire protection properties of the composite profile are additionally improved even further in a simple and advantageous manner. It is particularly advantageous if the fire protection strips are each made of a material which has the property of causing an endothermic reaction on combustion, as is advantageously the case when the fire protection strips are made of a material containing water of crystallization.

Further advantageous embodiments of the invention can be found in the dependent claims.

• Figur 1: eine Schnittdarstellung eines ersten erfindungsgemäßen Verbundprofils;
• Figur 2: eine Schnittdarstellung eines zweiten erfindungsgemäßen Verbundprofils;
• Figur 3: eine Schnittdarstellung einer weiteren Ausführungsvariante eines erfindungsgemäßen Verbundprofils nach Fig. 2, bei dem die Hohlräume innerhalb der Isolierstegzonen zusätzliche Wärmedämmstreifen aufweisen;
• Figur 4: eine Schnittdarstellung einer weiteren Ausführungsvariante eines erfindungsgemäßen Verbundprofils nach Fig. 2, bei dem die Hohlräume innerhalb der metallischen Profile zusätzliche Brandschutzstreifen aufweisen;
• Figur 5: eine Schnittdarstellung eines erfindungsgemäßen Verbundprofils aus Fig. 1;
• Figur 6 eine Ausschnittsvergrößerung des Verbundprofils nach Fig. 5; aus
• Figur 7 eine weitere Ausschnittsvergrößerung des Verbundprofils aus Fig. 5.

Exemplary embodiments of the subject invention are shown in the drawings and are described in more detail below. It shows:

• figure 1 : a sectional representation of a first composite profile according to the invention;
• figure 2 : a sectional view of a second composite profile according to the invention;
• figure 3 : a sectional view of a further embodiment variant of a composite profile according to the invention 2 , in which the cavities within the insulating bar zones have additional thermal insulation strips;
• figure 4 : a sectional view of a further embodiment variant of a composite profile according to the invention 2 , in which the cavities within the metallic profiles have additional fire protection strips;
• figure 5 : a sectional view of a composite profile according to the invention 1 ;
• figure 6 an enlarged section of the composite profile figure 5 ; out
• figure 7 another detail enlargement of the composite profile figure 5 .

In 1 a composite profile 1 according to the invention is shown. This composite profile 1 can be used as a casement profile as part of a casement or window frame for doors, windows or other facade elements, so that the following description relates equally to casement profiles and window frame profiles.

The composite profile 1 has a first metal profile, a metal outer profile 2, in which at least one hollow chamber 3 is formed, and a second metal outer profile 4, in which at least one hollow chamber 5 is also formed. Between the two metal profiles 2 and 4 there is a third metal profile, a metal middle profile 6, in which at least one hollow chamber 7 is also formed.

Alternatively, the metallic profiles 2, 4, 6 can also be designed without pronounced hollow chambers 3, 5, 7 or have several hollow chambers.

The first metal outer profile 2 is connected to the metal middle profile 6 via at least one or more first insulating bars (here parallel) 8 . These insulating strips 8 between the first metallic outer profile 2 and the metallic central profile 6 form a first insulating strip zone I or level. The second metal outer profile 4 is also connected to the metal middle profile 6 via at least one or more second (here parallel) insulating webs 9 . The insulating strips 9 between the second metallic outer profile 4 and the metallic central profile 6 form a second insulating strip zone II or plane.

The first and second insulating bars 8, 9 have here - purely by way of example - no hollow chamber. Alternatively, the insulating bars 8, 9 can also have one or more hollow chambers, or the respective first or the respective second insulating bars can be combined by transverse bars to form a type of superordinate insulating profile.

The insulating bars 8, 9 of the insulating bar zones I, II are here - purely by way of example - in one plane. Alternatively, it is also possible for the insulating strips 8, 9 of the insulating strip zones I, II to be offset vertically and/or horizontally with respect to one another.

The first and second metal outer profiles 2 and 4 and the metal middle profile 6 are preferably produced as extruded aluminum profiles. Alternatively, production from a different material such as steel and/or a different manufacturing process is also possible. The insulating webs 8 and 9 are made of a material that reduces the passage of heat, preferably a plastic material such as polyurethane, so that an extensive thermal separation between the metal profiles 2, 4, 6 is achieved in each case. Alternatively, metallic insulating bars with reduced heat transmission can also be used, which can be provided with interruptions or recesses to reduce heat transmission (e.g. in EP 0 717 165 A2 disclosed).

The insulating strips 8 and 9 are preferably designed in the form of strips in cross section and have thickened end sections 10 . Preferably, each of the attacks End sections 10 into a corresponding groove 11 of one of the metal profiles 2, 4, 6, with the groove walls enclosing the thickened end sections 10 of the insulating bars 8, 9 in the x and y direction (see coordinate system in 1 ) preferably embrace form-fitting. The respective end section 10 preferably has a trapezoidal or triangular or wedge-shaped or L-shaped or rectangular cross-section. The respective groove 11 accordingly has a cross section with a corresponding cross section in each case.

In order to obtain a shear-resistant and thus additionally non-positive connection between the respective end section 10 and the respective groove 11, it is advantageous if the respective end sections 10 are glued into the respective groove 11 or inserted with a wire or with another suitable joining method in the groove 11 are used, which indicates the shear strength in the profile direction (perpendicular to the plane of the drawing 1 ) , caused by a positive locking effect.

In 1 has -here purely by way of example- the second insulating strip zone II has the second insulating strips 9, the respective end sections 10 of which are positively and non-positively connected to the respective groove 11, so that one in each case is also in the z-direction (cf. coordinate system in 1 ) or in a direction orthogonal to the cross-sectional plane of the composite profile 1 results in a shear-resistant connection between the second insulating bars 9 and the outer and middle metal profiles adjacent to them. This connection is also referred to below as a shear-resistant design of one of the two - here the second - insulating strip zones. It provides shear resistance against the forces occurring due to dilatation on a window or door or the like.

The shear strength of the other - here the first - insulating bar zone I is in all variants lower than that of the first insulating bar zone II. It is selected in such a way that a displacement of at least two elements in the insulating bar zone relative to each other as a result of dilatation is possible. Insulating strip zone I with lower shear strength when installed is preferably on a window or door on the outside of a building, since the temperature differences here are greater than on the inside of the building, so that the lower shear strength is particularly important here to compensate for dilatation effects is. On the inside of the room, on the other hand, the insulating strip zone with increased shear strength is preferred. This variant of the invention is particularly advantageous. However, it is also conceivable to provide the insulating strip zone with higher shear strength towards the outside of the room.

The first insulating strip zone I preferably has - see 1 - Insulating bars 8, which each have a first end section 10 at one of their two ends, which is positively and non-positively connected to the respective groove 11, so that in each case a particular also in the z-direction (cf. coordinate system in 1 ) results in a shear-resistant connection.

The second ends of the first insulating strips 8 of the first insulating strip zone I, on the other hand, have an end section 12 which has a substantially welt-like cross section. The keder-like cross section is formed by a keder bead 13 and a keder flap 14 . The piping bead 13 has here - purely by way of example - a circular cross-section. Alternatively, the piping bead 13 can also have a non-round or oval or polygonal cross-section. The respective welt bead 13 engages in a groove 15 -here also purely by way of example- of the first metallic outer profile 2, while the welt flap 14 is led out of a groove opening from the groove 15, the groove walls of the respective end sections 12 having a substantially welt-like cross section of the insulating bars 8 in the x and y direction (see coordinate system in 1 ) embrace form-fitting.

The end section 12 with an essentially welt-like cross-section is - in contrast to the end section 10 - not connected to the groove 15 in a shear-resistant manner, so that in the z-direction (see coordinate system in 1 ) Low-shear connection - also known as a synonym for low-shear or low-shear connection in the prior art - is created, which can advantageously absorb temperature-related deformations of the first metal outer profile 2 . In Figures 5, 6 and 7 are inventive characteristics of a flexible or non-shear connection in the end section 12 of an insulating bar 8 is shown.

This creates a composite profile 1 that in the first thermal break zone I one in relation to the z-direction (cf. coordinate system in 1 ) relative to other insulating strip zone has a shear-reduced connection between the first metal outer profile 2 and the insulating strips 8 or the metallic central profile 6, in particular a flexible or shear-free connection, while the second insulating strip zone II has a shear-resistant connection between the second metallic outer profile 4 and the insulating strips 9 or the metallic center profile 6 has.

Alternatively, a composite profile 1 according to the invention can also have a low-shear, i.e. low-shear or low-shear, connection between the second metallic outer profile 4 and the insulating strips 9 or the metallic central profile in the second insulating strip zone II, while the first insulating strip zone I has a shear-resistant (re ) Connection between the first metal outer profile 2 and the insulating bars 8 and the metal center profile 6 has.

This results in a composite profile 1 that can compensate for temperature-related deformations by means of a shear-flexible or shear-free connection of one of the metal outer profiles 2, 4 and the respective insulating bars 8, 9 or with the metal middle profile 6 and, surprisingly, a composite profile 1 with a high area moment of inertia or area moment of the 2nd degree.

In a less preferred embodiment of the present invention, the composite profile 1 can also be used in both insulating bar zones I, II in relation to the z-direction (cf. coordinate system in 1 ) each have a shear-flexible or shear-free connection of the metallic outer profiles 2, 4 and the respective insulating bars 8, 9 or with the metallic middle profile 6.

The first metal outer profile 2 is preferably separated from the metal middle profile 6 by a hollow chamber 16, which is formed in the first insulating bar zone I between the two first insulating bars 8 and the adjoining metal profiles, while the metal middle profile 6 is separated from the second metal outer profile 4 by a Hollow chamber 17 is separated, which lies in the second insulating strip zone II between the second insulating strips 9 and the adjacent metal profiles. As a result, from an outside of the first metallic outer profile 2 to a second outside of the second metallic outer profile 4 a plurality of hollow chambers 3, 16, 7, 17 and 5 are formed, which ensure good thermal insulation.

The metallic outer profiles 2 and 4 have outwardly protruding webs 18 and 19 on opposite sides, a groove 20 for receiving a seal being provided on the end of the web 18 and a further groove 21 for receiving a seal being provided on the web 19 . Depending on the type of function (sash or frame), the webs 18 and 19 can also be present on one side, only one of these webs or none of these webs.

In 2 an alternative embodiment of a composite profile 1 according to the invention is shown. In order to avoid repetition, essentially deviations from or additions to the embodiment are described below 1 described.

In figure 2 the insulating strips 22 of the first insulating strip zone I between the first metallic outer profile 4 and the metallic central profile 6 have two insulating strip sections or sections or parts that can move relative to one another. A sliding guide is preferably formed between the partial sections. However, it is also conceivable for cross-connecting webs to be formed between the sections of the insulating webs, which are in turn formed in such a way that the sections can be moved relative to one another (not shown).

The insulating strips 22 of the first insulating strip zone I each have trapezoidal end sections 10 at both ends, which engage in the groove 11 of the first metallic outer profile 4 and the metallic central profile 6, with the groove walls enclosing the thickened end sections 10 of the insulating strips 22 in x and y -direction (see coordinate system in 2 ) embrace form-fitting. A knurled wire can also be arranged in this area. The respective end section 10 has a trapezoidal or triangular or wedge-shaped or L-shaped cross section. The respective groove 11 accordingly has a cross section with a corresponding cross section in each case.

In order to obtain a shear-resistant and thus additionally non-positive connection between the respective end section 10 and the respective groove 11, the respective end sections 10 are glued into the respective groove 11 and/or inserted with a wire or inserted into the groove 11 with another suitable joining method .

Both sections of the insulating bars 22 are in the y and x direction (relative to the coordinate system in 2 ) positively connected to each other by a piping connection. A first section of the insulating strip 22 has a piping bead 23 and a piping flap 24 . The other section, on the other hand, has a groove 25 with a corresponding cross-sectional geometry, so that the welt bead 23 engages in the groove 25 and the welt flap 24 is guided out of the groove 25 . A sliding guide is formed in this way.

The shear strength in the sliding guide orthogonal to the cross-sectional plane of the composite profile can, but does not have to, approach zero. It can also be greater than that of a pure sliding guide without such a brake due to a type of brake such as an elastomer on the sliding guide. Preferably, however, the shear strength in the zone of reduced shear strength is significantly, i.e. preferably at least 50% less than the shear strength in the other insulating bar zone. The two sections can also be connected to one another in a materially bonded manner. Instead of a sliding guide, the limitation of the relative mobility in the main extension direction of the composite profile (i.e. perpendicular to the plane of the drawing) can also be achieved in other ways, for example by connecting webs in such a way that the relative mobility to one another is limited orthogonally to the cross section of the profiles perpendicular to their longitudinal extension.

With respect to the z-direction (cf. coordinate system in 2 ), on the other hand, the connection is designed to be flexible or non-shear - ie with reduced shear relative to a shear-resistant connection. In Figures 5, 6 and 7 inventive characteristics of a flexible or non-flexible connection in the end section 12 of an insulating bar 8 are shown, which can also be applied analogously to a flexible or non-flexible connection of a two-part insulating bar 22.

This creates a composite profile 1 that in the first thermal break zone I one in relation to the z-direction (cf. coordinate system in 1 ) has a shear-flexible or shear-free connection between the first metallic outer profile 2 and the metallic middle profile 6, while the second insulating strip zone II has a shear-resistant connection between the second metallic outer profile 4 and the insulating strips 9 or the metallic middle profile 6.

Alternatively, a composite profile 1 according to the invention can also have a shear-flexible or shear-free connection between the second metallic outer profile 4 and the metallic middle profile 6 in the second insulating strip zone II, while the first insulating strip zone I has a shear-resistant connection between the first metallic outer profile 2 and the insulating strips 8 or metallic center profile 6 has.

This results in a composite profile 1 that can compensate for temperature-related deformations through a shear-flexible or non-shear connection of one of the metal outer profiles 2, 4 and the respective insulating bars 8 or with the metal middle profile 6 and, surprisingly, a composite profile 1 with a high moment of inertia or moment of area of the 2nd degree.

In a further alternative embodiment of the present invention, the composite profile 1 can also be used in both insulating bar zones I, II in relation to the z-direction (cf. coordinate system in 1 ) each have a shear-flexible or shear-free connection of the metallic outer profiles 2, 4 and the respective insulating bars 8 or with the metallic middle profile 6.

In 3 is another embodiment of a composite profile according to the invention 2 shown.

In figure 3 have hollow chambers 16, 17 of the first metallic outer profile 2 and the second metallic outer profile 4 each have a thermal insulation strip 26, 27. The thermal insulation strips 26, 27 are designed here - purely by way of example - as inserted thermal insulation strips. Alternatively, the thermal insulation strips 26, 27 each also be foamed into the cavities 16, 17 of the first metallic outer profile 2 and the second metallic outer profile 4. The thermal insulation strips 26, 27 are each made of a plastic material, preferably a foamed plastic material, particularly preferably polyurethane foam.

To 4 the metal outer profiles 2 and 4 and the metal middle profile 6 in hollow chambers 3, 5, 7 each have a fire protection strip 28, 29, 30. In the event of a fire, heat is first applied to one side of the composite profile 1, as a result of which the fire protection strips 28 or 30, preferably in the fire protection strips 28 or 30, release the crystal water bound in one of the metallic outer profiles 2 or 4 and thus release the corresponding metallic for a short time External profile 2 or 4 can cool.

In figure 5 or in Figures 6 and 7 is in each case a further embodiment variant of a composite profile according to the invention 1 shown.

In 6 are variants of the welt bead 13 and 23 shown. In 6 the piping bead 13 or 23 has a circular cross-sectional geometry. Alternatively, the cross-sectional geometry of the welt bead 13 or 23 can also be oval, elliptical or polygonal.

In addition, the welt bead 13 or 23 can have a co-extruded film or layer on its surface. The co-extruded foil can be constructed, for example, in such a way that the foil that comes into contact with the groove 15 of the first metallic outer profile 2 or with the second metallic outer profile 4 or with the groove 25 in the insulating strip 22 has a low coefficient of friction has, while the other side of the film or layer that comes into contact with the insulating strip 8, 22 forms a fixed connection with the insulating strip 8, 22. The co-extruded film therefore creates a layer that is firmly connected to the respective insulating bar 8, 22 and has a particularly low coefficient of friction in the area of the piping bead 13 or 23, so that in the z-direction (see coordinate system in 1 or. 2 ) quasi a shear-free or shear-soft connection is created.

In 7 a groove 15 or 25 is shown on a metal profile or an insulating strip section. The groove 15 or 25 has a circular cross-sectional geometry. Alternatively, the cross-sectional geometry of groove 15 or 25 can also be oval, elliptical or polygonal, depending on the selected cross-sectional geometry of welt bead 13 or 23, with which the cross-sectional geometry of groove 15 or 25 corresponds. In an alternative embodiment, the groove 15 or 25 can have a cross-sectional geometry 31 resembling a splined hub or a cross-sectional geometry resembling a splined hub.

Contact by several teeth 32 of a serration hub 31 or several wedges (not shown here) of the groove 15 or 25 in the first metallic outer profile 2 or in the second metallic outer profile 4 or in the insulating strip 22 results in a low-friction connection between the insulating strip 8, 22 and the groove 15 or 25 in the respective metallic outer profile 2, 4, or in the insulating bar 22 so that in the z-direction (see coordinate system in 1 or. 2 ) flexible connection is created. In addition, the teeth of the splined hub or the wedges of the splined hub contribute to the tolerance compensation between the welt bead 13 or 23 and the groove 15 or 25.

Reference List

1

composite profile

2

First outside profile

3

hollow chamber

4

Second external profile

5

hollow chamber

6

medium profile

7

hollow chamber

8th

insulating bar

9

insulating bar

10

end section

11

groove

12

end section

13

piping bead

14

piping flag

15

groove

16

hollow chamber

17

hollow chamber

18

web

19

web

20

groove

21

groove

22

Two-piece insulating bar

23

piping bead

24

piping flag

25

groove

26

thermal insulation strips

27

thermal insulation strips

28

fire break strips

29

fire break strips

30

fire break strips

31

serration

32

Tooth

I

First insulating bar zone

II

Second insulating bar zone

Claims (22)

1. A composite profile (1) for doors, windows or façade elements with

   a. at least one first metal profile (2) and

   b. at least one second metal profile (4),

   c. wherein there is at least one middle metal profile (6) between these two metal profiles (2, 4),

   d. wherein the first metallic exterior profile (2) is connected to the middle metal profile (6) in a first insulating bar zone (I) via one or more insulating bar(s) (8, 22), and

   e. wherein the second metal profile (4) is connected to the middle metal profile (6) in a second insulating bar zone (II) via one or more insulating bar(s) (9, 22),
   characterised in that

   f.the two insulating bar zones (I, II) have different shear strengths orthogonally to the cross sectional plane of the composite profile (1).
2. The composite profile (1) according to claim 1, characterised in that a rigid connection is formed between the elements connected to one another in one of the insulating bar zones, whereas the rigidity of the elements connected to one another in the other insulating bar zone I or II is lower in relation to the first insulating bar zone mentioned.
3. The composite profile (1) according to any of the preceding claims, characterised in that a sliding guide is formed between the elements connected with each other in one or both of the insulating bar zones, and/or
4. The composite profile (1) according to any of the preceding claims, characterised in that the insulating bars (8, 9, 22) have thickened end sections (10) on one or both of their ends, and/or in that at least one or a plurality or all of the end sections (10) have a trapezoidal, or triangular or wedge-shaped, or L-shaped cross section, and in that the respective end sections each engage in a corresponding groove (11) in each of the metal profiles (2, 4, 6).
5. The composite profile (1) according to any of the preceding claims, characterised in that the walls of the respective groove (11) positively grasp the respective end section (10) of the insulating bar (8, 9, 22) in the direction in which the cross section of the composite profile (1) extends.
6. The composite profile (1) according to any of the preceding claims, characterised in that the respective end section (10) is glued into the respective groove (11) or is inserted with a wire or is inserted frictionally and/or positively into the groove (11) with another suitable joining process in relation to a direction orthogonal to the cross sectional plane of the composite profile (1).
7. The composite profile (1) according to any of the preceding claims, characterised in that at least one of the insulating bars (8) in the first insulating bar zone I or the second insulating bar zone has at least one end section (12) which has a generally piping-like cross section, wherein the piping-like cross section is formed of a piping bead (13) and a piping tag (14), wherein preferably the piping bead (13) engages in a groove (15) in a metal profile (2, 4), and in that the piping tag (14) is guided out of a groove opening out of the groove (15).
8. The composite profile (1) according to any of the preceding claims, characterised in that the walls of the groove (15) positively grasp the end section (12) of the one or more insulating bars (8) with a generally piping-like cross section in the direction in which the cross section of the composite profile (1) extends, wherein preferably the end section (12) with a generally piping-like cross section is not additionally frictionally connected to the groove (15).
9. The composite profile (1) according to any of the preceding claims, characterised in that the one or more insulating bars (22) in the insulating bar zone I with lower shear strength have two segments which move in relation to one another, wherein preferably a sliding guide is formed between the segments.
10. The composite profile (1) according to any of the preceding claims, characterised in that crossbars are designed between the segments of the insulating bars which in turn are designed such that the segments are able to move in relation to one another.
11. The composite profile (1) according to any of the preceding claims, characterised in that the two parts of the one or more insulating bars (22) are positively connected to one another in the direction in which the cross section of the composite profile (1) extends by a sliding guide which is in any case effective over a limited distance in particular in the area of a piping connection.
12. The composite profile (1) according to any of the preceding claims, characterised in that the two parts of the one or more insulating bars (22) are positively connected to one another in the direction in which the cross section of the composite profile (1) extends by a sliding guide which is in any case effective over a limited distance in particular in the area of a piping connection, and/or in that one half of the one or more insulating bars (22) has a piping bead (23) and a piping tag (24).
13. The composite profile (1) according to any of the preceding claims, characterised in that a braking system which increases the local shear strength is provided on the sliding guide.
14. The composite profile (1) according to any of the preceding claims, characterised in that one half of the one or more insulating bars (22) has a groove (25) with cross sectional geometry corresponding to that of the piping bead (23) and piping tag (24).
15. The composite profile (1) according to any of the preceding claims, characterised in that the piping bead (13, 23) has a circular or a non-round or oval or polygonal cross section, and/or in that the piping bead (13, 23) has a co-extruded film on its surface, wherein preferably the co-extruded film has a film layer which results in a lower friction coefficient in connection with the metal profile (2, 4).
16. The composite profile (1) according to any of the preceding claims, characterised in that the groove (15, 25) has splined hub-like cross sectional geometry (31) or a spline shaft hub-like cross sectional geometry.
17. The composite profile (1) according to any of the preceding claims, characterised in that the one or more insulating bars (8, 9, 22) have a bar-shaped cross section and/or the one or more insulating bars (8, 9, 22) have a hollow chamber.
18. The composite profile (1) according to any of the preceding claims, characterised in that the one or more insulating bars (8, 9, 22) in the insulating bar zones I, II lie within a plane or are arranged each offset vertically or horizontally from one another.
19. The composite profile (1) according to any of the preceding claims, characterised in that the insulating bars (8, 9, 22) are made from a plastic material, preferably from a porous plastic material, particularly preferably from a foamed polyurethane, and/or in that the first metallic exterior profile (2) and the second metallic exterior profile (4) and the metallic middle profile (6) are designed as metal profile, particularly preferably as aluminium profile, wherein preferably the first metallic exterior profile (2) and/or the second metallic exterior profile (4) and/or the metallic middle profile (6) has/have at least one hollow chamber (3, 5, 7).
20. The composite profile (1) according to any of the preceding claims, characterised in that at least one hollow chamber (16, 17) each is designed in the insulating bar zones, wherein preferably at least one of the hollow chambers has thermal insulation strips, and/or wherein preferably at least one of the hollow chambers has a firebreak.
21. A window or door or façade element with at least one or more composite profiles according to any of the preceding claims.
22. The window or door according to claim 21, characterised in that the composite profiles are oriented such that they comprise the insulating bar zone with reduced shear strength relative to the other insulating bar zone on the side which is designed to be oriented towards the outside of the room.

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