EP0799964A1 - Thermally insulating coupling bar - Google Patents

Abstract

The insulating element (16) has a fastening section (18) at each end each consisting of two arms (42) which are angled to define a channel-like intermediate space (44) inbetween. At least one shear-off nose (46) is provided on the arms of each fastening section and at least one points towards the interspace. A centre web (40) connecting the two fastening sections is moulded onto an anvil element (22) which extends across the longitudinal extension of the centre web and ends on the side remote from same in a flat contact face (24). The anvil element can be forked with a grooved fastening chamber formed between the arms of same.

Description

The present invention relates to an insulating element for thermal insulation, in particular for connecting two half-shells of a metal composite profile.

Such metal composite profiles are usually used for windows, doors, facades and the like, the or the insulating elements arranged between two half-shells of a metal composite profile being made of a material with low thermal conductivity. As a result, the heat flow between the half-shells of the composite profile is significantly reduced. When using the composite profiles for windows, doors or facades mentioned above, one of the two half-shells is often exposed to the indoor climate, while the other half-shell points to the outside of the building and is therefore exposed to the outside climate. If there is a good heat-conducting connection between the two half-shells of a composite profile, then in the case of a low outside temperature there is an undesirable loss of heat through the composite profile, while in the case of an air-conditioned room climate at a very high outside temperature, the energy expenditure for maintaining the indoor climate increases significantly.

A composite profile is known from G 295 17 375.0, the two half shells of metal being separated by one or more arranged heat insulating insulating webs are connected to the half-shells. The half-shells of the composite profile each have edge regions which enclose a correspondingly shaped edge section of the insulating web on at least three sides and additionally have material sections which can be deformed in the direction of the edge section of the insulating web and secure this against longitudinal displacement relative to the half-shells.

The present invention has for its object to provide a suitable insulating element of the type mentioned, which can achieve high pull-out values with the half-shells of a metal composite profile and allows improved thermal insulation.

• jeweils einen Befestigungsabschnitt an zwei Enden des Isolierelements, wobei der Befestigungsabschnitt jeweils aus zwei Schenkeln besteht, die abgewinkelt sind und einen rinnenförmigen Zwischenraum zwischen sich begrenzen;
• mindestens eine Abschernase an den Schenkeln jedes Befestigungsabschnittes, wobei die Abschernasen in Richtung des rinnenförmigen Zwischenraumes weisen; und
• einen Mittelsteg, der die beiden Befestigungsabschnitte verbindet und an dem mindestens ein Amboßelement angeformt ist, das sich im wesentlichen quer zur Längserstreckung des Mittelsteges erstreckt und auf der dem Mittelsteg abgewandten Seite in einer im wesentlichen ebenen Kontaktfläche endet.

This object is achieved by an insulating element of the type mentioned at the outset, comprising:

• each have a fastening section at two ends of the insulating element, the fastening section each consisting of two legs which are angled and delimit a channel-shaped space between them;
• at least one shear lug on the legs of each fastening section, the shear lugs pointing in the direction of the channel-shaped intermediate space; and
• a central web that connects the two fastening sections and on which at least one anvil element is formed, which extends essentially transversely to the longitudinal extension of the central web and ends on the side facing away from the central web in a substantially flat contact surface.

By forming a fastening section at two ends of the insulating element and between two Legs of the fastening section formed, trough-shaped gaps, a fastening with high pull-out values can be achieved between the half-shells of the metal composite profile by appropriately shaped tongue elements can be pressed into the trough-shaped interspace in the fastening regions of the half-shell surrounding the fastening section. Since there is at least one shear lug on the legs of each fastening section and the at least one shear lug points in the direction of the trough-shaped space, when the insulating element is fixed in the fastening region of a half-shell, the tongue element penetrates into the material of the insulating element in the region of the shear lug or shear lugs, as a result of which a form-fitting shoulder between the insulating element and the tongue element. This allows the pull-out values to be increased further. By pivoting several tongue elements in opposite directions to each other into the trough-shaped space of an insulating element, the pull-out values for tensile and shear loads are increased equally.

By molding at least one anvil element on the central web of the insulating element, the heat radiation between the half-shells is reduced because the anvil elements which run essentially transversely to the longitudinal extension of the central web form a barrier between the two half-shells, as a result of which the heat losses due to radiation between them are reduced. Since the anvil elements end in an essentially flat contact surface, two anvil elements of two different insulating elements can be brought into contact with one another. In addition to a very effective shielding of the heat radiation between the two half-shells of a metal composite profile, the anvil elements also influence the free one Convection in the cavities between the two half-shells by changing the free cross-section between them. In the event that two anvil elements of different insulating elements collide, the cavity between the two half-shells is even divided into smaller chambers.

According to an advantageous embodiment, the at least one anvil element has a forked shape, a groove-like fastening space being located between two legs of an anvil element. These groove-like fastening spaces serve to fasten a shielding element which can be inserted into the groove-like fastening space of two anvil elements to be pointed towards one another. As a result, the heat radiation between the half-shells of a metal composite profile can be effectively shielded even if the anvil elements of adjacent insulating elements do not touch each other.

It has proven to be particularly advantageous to design at least one fastening lug on the central web, which extends essentially transversely to the longitudinal extension of the central web. This fastening lug can perform different functions. On the one hand, they can be used to attach additional insulating profiles, which means that a change in the convection conditions in the cavity between the half-shells of the composite profile can be achieved. In the same way, the fastening lug can also be used to fasten sealing elements.

According to a further advantageous embodiment of the insulating element, it has at least one insulating web which is formed on the central web and extends essentially transversely to the longitudinal extension of the central web. On Such an insulating web, like the anvil elements, forms a transverse barrier which, on the one hand, reduces the heat radiation between the half-shells of the composite profile in this area, and on the other hand also divides the convection space into individual chambers, thereby helping to change the convection conditions in a targeted manner.

One or more of the fastening lugs preferably has an angled cross-sectional shape, with one leg running essentially parallel to the longitudinal extension of the central web and spaced apart therefrom. This special shape of one or more of the fastening lugs allows additional insulation bodies, but also sealing elements, to be installed in a simple manner, since they can either snap elastically into the fastening lugs or can be pushed into the L-shaped cross-sectional area thereof.

The insulating element is advantageously made in one piece from plastic. On the one hand, this allows the complex-shaped profile to be produced cost-effectively, and on the other hand, the selection of a material with the lowest possible thermal conductivity. Furthermore, a plastic can be selected, the elasticity of which can absorb slight deviations in the distance between the two half-shells of a composite profile caused by production or assembly due to its elasticity. Finally, a material can be selected that allows the shear lugs to be sheared off when fastened in the composite profile.

According to a preferred embodiment, the insulating element consists of glass fiber reinforced plastic, the shear noses not being penetrated by glass fibers. As a result, when attaching the insulating element in the Half-shells of the composite profile and the above-described shearing off of the shearing noses does not destroy the glass fiber network. As a result, the preferred fastening of the insulating elements, the insertion of the fastening sections into correspondingly shaped half-shells of a metal composite profile and the fixing of the position thereof by means of tongue elements on the metal composite profile can be achieved.

Fig. 1

einen horizontal verlaufenden Schnitt durch ein Metallverbundprofil mit zwischen den Halbschalen angeordneten Isolierelementen;

Fig. 2

einen horizontalen Schnitt durch ein Metall-Verbundprofil, das verschiedene Einsatzmöglichkeiten der Isolierelemente darstellt;

Fig. 3

eine Ausführungsform des Isolierelements; und

Fig. 4

eine andere Ausführungsform des Isolierelements und dessen Befestigung in der Befestigungsrinne einer Halbschale.

Preferred embodiments and further details and advantages of the invention will now be described below with reference to the drawings. Show it:

Fig. 1

a horizontal section through a metal composite profile with insulating elements arranged between the half-shells;

Fig. 2

a horizontal section through a metal composite profile, which shows different possible uses of the insulating elements;

Fig. 3

an embodiment of the insulating element; and

Fig. 4

another embodiment of the insulating element and its fastening in the fastening groove of a half-shell.

In Fig. 1 the arrangement of two insulating elements between the two half-shells of a metal composite profile is shown.

The composite profile 10 consists of an outer shell 12 and an inner shell 14. Both the outer shell and the inner shell consist of metal, in particular stainless steel, or non-ferrous metal materials. The half-shells 12 and 14 are each formed in one piece from a metal sheet, the profiling preferably being achieved by rolling. Between the outer shell 12 and the inner shell 14 are each arranged an insulating element 16, which consists of a material with low thermal conductivity and therefore significantly reduces the heat flow from the inner shell 14 to the outer shell 12, but also in the opposite direction.

The insulating elements 16 are each at two ends, i.e. in the installed position between the half-shells at the ends facing the outer shell 12 and the inner shell 14 is provided with a fastening section 18 which is preferably formed in one piece with the insulating element 16. The exact shape of the fastening sections 18 will be explained at a later point in time. The fastening sections 18 are designed such that they can be inserted into the fastening grooves 20 of the outer shell 12 as well as the inner shell 14. The fastening grooves 20 on the half-shells are shaped such that they firmly enclose an inserted fastening section 18 of an insulating element. As can be seen from FIG. 1, the insertion of the insulating elements 16 into the fastening grooves 20 of the outer shell as well as the inner shell can only be carried out by pushing them in perpendicular to the plane of the drawing.

In order to fasten the insulating elements to the half-shells 12 and 14 of the composite profile, a measure is required to prevent their displaceability perpendicular to the plane of the drawing in FIG. 1 and at the same time to obtain desired pull-out values, ie a desired transmission of tensile and shear forces between the fastening sections 18 and to achieve the mounting channels 20. For this purpose, 20 material sections are worked out in the fastening troughs and deformed into the fastening trough 20 in such a way that the fastening sections 18 are each secured in the fastening troughs 20 against displacement. For an accurate Explanation of a possible method of carrying out this fastening is referred to utility model G 295 17 375.0.

Anvil elements 22 are formed on each of the insulating elements 16 and are essentially perpendicular to the longitudinal extent of the respective insulating element. The anvil elements each end in a contact surface 24, in the present case the contact surfaces 24 facing one another being spaced apart from one another by two insulating elements 16. The anvil elements 22 are additionally provided with a groove-shaped recess 26 into which a shielding element 28 can be inserted. In the metal composite profile shown in FIG. 1, shielding elements 28 are inserted in each case between two anvil elements 22 of the two insulating elements to be pointed towards one another. These shielding elements 28 serve to significantly reduce heat losses due to heat radiation between the outer shell 12 and the inner shell 14. In addition, the cavity which is formed between the outer shell 12, inner shell 14 and the two insulating elements 16 is divided into three individual chambers by the shielding elements 28. This changes the free convection flow in the cavity. The shielding elements 28 are preferably made of plastic.

Fastening lugs 30 are additionally formed on the insulating elements 16 and can perform various fastening tasks, as will be described below with reference to FIG. 2.

Fig. 2 shows a horizontal section through a metal composite profile and serves to explain various uses and applications of the insulating elements according to the invention. In the embodiment shown in FIG. 2, there are between the outer shell 12 and the inner shell 12 Four insulating elements are arranged, which are designated 16a, 16b, 16c and 16d for better differentiation. While the two insulating elements 16a and 16d have the same shape, the insulating elements 16b and 16c are each designed differently from them.

As described above with reference to FIG. 1, a shielding element 28 is arranged between the two insulating elements 16a and 16b between the anvil elements 22.

As has also already been described with reference to FIG. 1, the insulating element 16b has a fastening lug 30 which serves to receive a sealing element 32. The sealing element 32 is provided with a baseboard 34 which can be pushed into the fastening space which is formed between the fastening groove of the outer shell 12 and the fastening lug 30. The fastening lug is preferably L-shaped, as in the example shown, and consists of two legs; a first leg which extends perpendicularly to the longitudinal extent of the insulating element and a second leg which is integrally formed at a right angle on the end of the first leg remote from the insulating element. As a result, the correspondingly shaped baseboard 34 of the sealing element 32 is firmly fixed between the insulating element and the fastening channel 20 of the outer shell 12.

Fastening lugs 30 are also formed on the insulating element 16c and serve to fasten a cover profile 36. The cover profile 36 is an additional insulating element which is used in particular to change the convection flow in the cavity formed between the outer shell, inner shell and the insulating elements. The cover profile 36 is shaped accordingly to between the fastening lugs 30 and the fastening channel of the inner profile or a fastening lug and an insulating web 38 to be fastened.

The insulating web 38 on the insulating element 16c extends essentially perpendicular to the longitudinal extent of the insulating element and serves, together with the sealing element 32, to create a barrier between the insulating elements 16b and 16c, which are intended to reduce the heat radiation between the half-shells of the composite profile.

There is also such a barrier between the insulating elements 16c and 16d, which is formed by the anvil elements 22 of the insulating elements 16c and 16d pointing towards one another and coming into contact with one another almost or completely. Due to the formation of the anvil elements with the contact surfaces which are formed at the end facing away from the relevant insulating element, forces can also be transmitted between two abutting anvil elements 22.

In summary, it is clear from Fig. 2 that either by direct contact of the anvil elements 22 with one another or by an interposed shielding element 28 on the one hand and by bringing an insulating web 38 into contact with a sealing element 32, which can also be fastened to an insulating element, on the other hand a continuous one Shielding can be created between the outer shell 12 and the inner shell 14, whereby heat losses due to heat radiation can be significantly reduced.

3 shows an embodiment of an insulating element 16, as is already clear from a comparison of the insulating elements in FIGS. 1 and 2, a large number of different shapes of the insulating elements are possible.

The insulating element 16 shown in FIG. 3 essentially consists of a central web 40, on the one hand 40 fastening sections 18 are formed on both longitudinal ends of the central web, and on the other hand an anvil element 22 which extends perpendicular to the longitudinal direction of the central web 40. In addition, 40 fastening lugs 30 and an insulating web 38 are formed on the central web, the function and possible uses of which have already been described above.

The fastening sections 18 each consist of two legs 42, the longitudinal axes of which form an acute angle with one another, because the two legs 42 of a fastening section 18 run diverging away from the plane of the central web 40. Between the two legs 42 there is a groove-like fastening space 44 which serves to receive a fastening element on the fastening groove of the half-shells of a composite profile. Each of the two legs 42 has a shear nose 46, which point from the legs 42 in the direction of the groove-like fastening space 44.

The insulating element 16 is made in one piece from plastic, the plastic preferably being glass fiber reinforced. If a glass fiber reinforced plastic is used, however, the shear noses are not penetrated by glass fibers. The shear noses are a targeted accumulation of material, which are removed as part of the fastening of the fastening sections 18 in a correspondingly shaped fastening groove of the metal profile. Since the shear noses are not traversed by glass fibers, the glass fiber network is not destroyed when the shear noses are sheared off.

4 shows another embodiment of an insulating element 16 and its fastening in a fastening groove 20 of a composite profile.

The insulating element 16 shown in FIG. 4 has a significantly shorter central web 40 and only one insulating web 38 and an anvil element 22 compared to the one shown in FIG. 3. The fastening sections 18 are constructed as described above with reference to FIG. 3. If a fastening section 18 is now inserted into the fastening groove 20 of an inner shell or outer shell, this remains in the axial direction, i.e. 4 in the mounting groove perpendicular to the plane of the drawing. In order to axially fix the fastening section 20 in the fastening groove 20, tongue elements 48 are formed on the fastening groove 20, which can be pivoted in in the direction of the groove-like fastening space 44. As is clear from FIG. 4, the tongue element 48 shears off the shearing lugs 46 on the legs 42 of the fastening section 18 when pivoting into the groove-like fastening space 44. This forms lugs on the legs 42 in the overlap region with the tongue element 48, which bring about a form fit in the axial direction between the tongue element 48 and the legs 42. This allows high pull-out values in the form of high tensile and shear stresses between the insulating element and the profile half-shells. The tongue elements 48 are preferably punched out of the material of the fastening grooves 20, however, both the manufacturing step used in the manufacture of the tongue elements and the geometry of the tongue elements can vary considerably depending on the application.

The insulating element according to the invention can already be preassembled and connected to one of the half-shells of a composite profile can and due to the shearing off of the specifically attached material accumulations in the form of shearing noses by the tongue element firmly fixed with the half-shells of a composite profile. Due to the provision of the anvil elements and, if necessary, the insulating webs, effective shielding of the heat losses by heat radiation between the profile half-shells can be achieved even in the case of complex composite profiles. In addition, fastening devices in the form of fastening lugs or fastening claws can be provided on the insulating element, which permit the attachment of sealing elements but also cover profiles.

Claims (9)

Insulating element (16) for thermal insulation, in particular for connecting two half-shells (12, 14) of a metal composite profile (10), comprising: - a fastening section (18) at two ends of the insulating element (16), the fastening section (18) each consisting of two legs (42) which are angled and delimit a channel-shaped intermediate space (44) between them; - At least one shear lug (46) on the legs (42) of each fastening section (18), the at least one shear lug (46) pointing in the direction of the trough-shaped intermediate space (44); and - A central web (40), which connects the two fastening sections (18) and on which at least one anvil element (22) is formed, which extends essentially transversely to the longitudinal extent of the central web (40) and on the side facing away from the central web (40) ends in a substantially flat contact surface (24). Insulating element (16) according to claim 1
characterized in that
the at least one anvil element (22) has a forked shape, a groove-like fastening space being located between two legs of an anvil element. Insulating element (16) according to one of the preceding claims,
characterized in that
at least one fastening lug (30) is formed on the central web (40) and extends essentially transversely to the longitudinal extension of the central web (40). Insulating element (16) according to one of the preceding claims,
characterized in that
at least one insulating web (38) is formed on the central web (40) and extends essentially transversely to the longitudinal extension of the central web (40). Insulating element (16) according to claim 3,
characterized in that
one or more of the fastening lugs (30) have an angled cross-sectional shape, one leg running essentially parallel to the longitudinal extension of the central web (40) and spaced therefrom. Insulating element (16) according to claim 3 or 5,
characterized in that
the at least one anvil element (22) extends in the opposite direction from the central web (40) like the fastening sections (18). Insulating element (16) according to one of the preceding claims,
characterized in that
the insulating element (16) is made in one piece from plastic. Insulating element (16) according to claim 7,
characterized in that
the insulating element (16) consists of glass fiber reinforced plastic, the shear noses (46) not being penetrated by glass fibers. Insulating element (16) according to one or more of the preceding claims,
characterized in that
the fastening sections (18) can be inserted into correspondingly shaped half-shells (20) of a metal composite profile (10) and can be fixed in position on the metal composite profile by means of tongue elements (48).

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