DE102008028161A1 - Rafter for use in warm roof i.e. winter garden roof, to accommodate surface elements i.e. insulation glass plates, has heat insulation bridge and damming outer shell with heat insulating characteristics is provided in sections - Google Patents

Abstract

The rafter (20) has a heat insulation bridge that is arranged between two rafter elements (1, 2), and a support (11) for an edge area of surface elements (10). A damming outer shell (22) with heat insulating characteristics is provided in sections. The rafter element (1) is an oblong carrying profile that is rectangular in cross section and the rafter element (2) is an oblong, flat support profile. The bridge has two oblong insulation bars (7) that are made from plastic. The shell is an oblong aluminum profile and consists of heat insulation material (23) such as foam material.

Description

The The present invention relates to a rafter according to the preamble of the claim 1, and a hot roof, in particular a conservatory roof, according to the preamble of claim 15.

It is known that so-called "warm roofs", d. H. thermally insulated Roofs, especially conservatory roofs, essentially from an arrangement of rafters and between the Rafters arranged surface elements, preferably heat-insulating Glass elements are formed. The rafters in turn include in usually a first rafter element, a second rafter element, between the first rafter element and the second rafter element a heat insulation bridge arranged where is the rafter with at least one receptacle for the edge area a surface element Is provided. The rafter profile includes, depending on the design as inside or outside profile one or two shots.

It is noteworthy in this connection that a warm roof, such as a conservatory roof, has heat-insulating properties. The heat flow between the roof bottom and the top of the roof should be kept as low as possible. To this end, rafters according to the prior art already have a thermal insulation bridge between two, preferably made of aluminum, rafter elements. In a typical installation situation of rafters, the first rafter element facing the top of the roof and the second rafter element facing the underside of the roof. The thermal separation of the two rafter elements by means of the thermal insulation bridge can already achieve an acceptable heat transfer coefficient (U _f value). The existing heat usually within the conservatory flows accordingly little over such a ausgestaltetes roof.

Nevertheless are reached so far with the rafters that have become known Heat transfer coefficient still in need of improvement.

It is in accordance with the object of the present invention, a rafter for a Warm roof, in particular a conservatory roof to propose, the improved heat-insulating Properties, in particular has an improved heat transfer coefficient.

According to the invention this object is achieved by a rafter with the characterizing features of claim 1. Characterized in that the rafter is at least partially equipped with a Dämmaußenschale with heat-insulating properties, preferably wrapped in sections, particularly low heat transfer coefficients (U _f values) can be achieved. With the proposed arrangement of the invention can, for example, reach _f -value opposite rafters according to the prior art, improvements to the U that are within the range of about 0.4 W / m ² K. Accordingly, through the use of rafters according to the invention a warm roof, in particular a conservatory roof, can be provided, which is characterized overall by a much better thermal insulation. The resulting energy-saving effect is obvious.

Further yield advantageous embodiments of the proposed rafter in particular by the features of the subclaims.

It can be provided in particular advantageously that the Dämmaußenschale an outer shell and a thermally insulating Material has. Furthermore, it may be advantageously provided that the heat-insulating Material of the outer shell, in particular the shaped body, is equipped with a recess for attaching to the Rafter, in particular the support profile is suitable. In this manner and let way the Dämmaußenschale very easy on an existing rafter according to the state of Put on the technology. A conversion an existing, already built rafter is thus very easy.

Also it proves to be advantageous if the outer shell by a spacer profile, preferably a non-thermally conductive Distance profile, is connected to the support profile. This can ensured a corresponding spacing between outer shell and support profile so that tends to be a soft thermal insulation material, such as For example, foam, is not pressed when loading the outer shell.

It may also be advantageously provided that the receptacle is formed from a portion of the Dämmaußenschale, a portion of the support profile and a portion of the support profile. Accordingly, the non-heat-insulating retaining strip known from the prior art can be completely dispensed with. The Dämmaußenschale assumes both the function of the retaining strip, as well as a would meisolating function. It is conceivable, of course, that the existing retaining strip is maintained and the Dämmaußenschale is slipped over the available part of the support profile.

Further Features and advantages of the present invention will become apparent with reference to the following description of preferred embodiments with reference to the attached figures. Show in it

1 a sectional view of a rafter for a warm roof with surface elements (cutout) according to the prior art;

2 a warm roof (conservatory roof), according to the prior art;

Table 1 selected characteristics of rafters and surface elements according to the prior art ( 1 );

3 a sectional view of a rafter according to the invention for a warm roof with surface elements (detail);

4 an inventive warm roof (conservatory roof);

Table 2 selected characteristics of a rafter invention and surface elements ( 3 ).

It the following reference numbers are used:

1

first Sparr element / carrier profile

2

second Sparr element / support profile

3

retaining profile

4

connecting device for holding profile

5

contact edge

6

poetry

7

insulating strip

8th

connecting device for insulating strip

9

thermal insulating Material (insulation bridge)

10

surface element

11

edition

12

rafter (State of the art)

13

Conservatory roof (State of the art)

20

inventive rafters

21

Winter garden roof according to the invention

22

outer shell

23

heat-insulating Material (insulating outer shell)

24

recess

25

Space bar

26

connecting device (Spacer profile)

27

groove

28

feather

First, it will open 1 Referenced.

A rafter 12 for a hot roof according to the prior art essentially comprises a first rafter element 1 , a second rafter element 2 , being between the first rafter element 1 and the second rafter element 2 a thermal insulation bridge is arranged, wherein the rafter with at least one receptacle for the edge region of a surface element 10 Is provided.

The first rafter element 1 is designed as a support profile. The support profile is formed substantially as an elongated hollow profile made of aluminum, has a rectangular cross-section and is rounded at its top side. The first rafter element 1 is end with connection devices 8th for the thermi equipped with a special insulation bridge. Furthermore, the first rafter element 1 connecting devices 4 for holding profiles 3 on, preferably laterally of the first rafter element 1 are provided. The first rafter element 1 takes by its rigid configuration a large part of the surface elements 10 applied weight on. It can therefore be referred to as a support profile for this reason.

The insulation bridge has essentially two insulating strips 7 and preferably a heat insulating material 9 on. The insulating strips 7 have suitable connection devices 8th for connection to the rafter elements 1 . 2 on. It may preferably be a shear-resistant connection between the rafter elements 1 . 2 and the insulating strips 7 getting produced. The heat-insulating material 9 , preferably in the form of a foam molding, is disposed in the cavity resulting from the array of insulating strips 7 and sections of the first rafter element 1 and the second rafter element 2 results. At the insulating strips 7 these are preferably plastic profiles.

The second rafter element 2 is designed as a support profile. The support profile is designed essentially as an elongated flat profile, wherein the flat profile also with connection devices 8th for the thermal insulation bridge, in particular the insulating strip 7 , Is provided. Depending on the purpose of the rafter, as inside or outside rafter, the support profile with one or two editions 11 fitted. In the 1 is an embodiment with two editions 11 imaged, which gives the rafter as a whole a T-shaped cross-section. An external rafter would accordingly have an approximately L-shaped cross section.

At the holding profiles 3 These are essentially elongate profiles that are approximately L-shaped in cross-section, preferably aluminum profiles. The holding profile 3 on the one hand has a connection device 4 for detachable connection to the first rafter element 1 , as well as a plant edge 5 for the surface element 10 on. The edge of the investment 5 can also with a seal 6 be provided.

From the arrangement of holding profile 3 , in particular the abutment edge 5, a portion of the first profile 1 , the insulation bridge, in particular the insulating strip 7 , and a portion of the second rafter element 2 , especially the edition 11 , results in a cross-sectionally approximately C-shaped receptacle, which is for receiving the edge region of a surface element 10 , preferably a heat-insulating glass pane, is set up.

The rafter described above 12 is used as a rafter for a warm roof 13 , For example, a conservatory roof, used. A warm roof 13 accordingly comprises a number of rafters, preferably arranged in parallel 12 , being between the rafters 12 a surface element 10 , preferably a heat-insulating glass element, is arranged. The surface elements 10 Be the edge accordingly in the recordings or the rafters 12 held. A corresponding warm roof 13 in the prior art is in 2 outlined.

It is for the thermal insulation of the warm roof 13 necessary that a thermal separation between the roof base and the roof top takes place. As a rule, the roof underside is heated by warm air. In contrast, cold air is present on the roof top. As far as no thermal separation would be present, the heat would preferably delivered through the rafters. This will be at a rafter 12 prevented in the prior art by the isolation bridge.

The principle of the "interposed" isolation bridge helps to achieve acceptable U _f values, which, however, can be further improved. With a rafter 12 According to the prior art, heat transfer values (U _f values) of about 1.7 W / m ² K can be achieved. The lower the U _f value, the better the thermal separation, and the lower the power consumption. This is where the proposed invention and wants to further improve a rafter for a hot roof in terms of its thermal insulation. Improved, even lower U _f values are sought.

According to the invention it is proposed that a rafter 20 , in particular the first profile element 1 a rafter 20 , At least partially covered with a Dämmaußenschale is.

The Dämmaußenschale essentially comprises an outer shell 22 and a heat-insulating material 23 , in particular a foam body.

At the outer shell 22 it is a cross-sectionally U-shaped, elongated aluminum profile. The heat-insulating material is on the inside of the outer shell 22 attached, the heat iso lancing material 23 is preferably designed as a foam molding.

The heat-insulating material 23 , in particular the foam molding, has a recess 24 on, which allows the Dämmaußenschale on the first profile element 1 aufzustecken. Preferably, at least one positive, preferably also a frictional, connection between the foam molding 23 and the first profile element 1 produced. The recess 24 can accordingly have a slight undersize.

In addition, for connection and also to maintain a distance between the outer shell 22 and the first profile element 1 a distance profile 25 , preferably a plastic spacer profile may be provided. For this purpose, the rafter, in particular the first profile element 1 , a connection device 26 for the distance profile. Accordingly, the Dämmaußenschale, in particular the outer shell 22 , a connection device 26 on. At the connection devices 26 For example, they may be grooves, bores or similar means. In the preferred embodiment proposed here, for example, it is provided that the first profile element 1 with a longitudinal groove 27 is provided, wherein the distance profile 25 with one for insertion into the groove 27 suitable spring 28 Is provided. In addition, the outer shell features 22 a number of holes and the spacer profile corresponding screw receptacles, for example, also in the form of a groove (both not shown), can be screwed into the screws. Here are numerous, familiar to those skilled, mounting options conceivable.

Furthermore, the Dämmaußenschale has a contact edge 5 on. Accordingly, from a portion of the Dämmaußenschale, in particular the contact edge 5 , a section of the first profile 1 , the insulation bridge, in particular the insulating strip 7 , and a portion of the second rafter element 2 , especially the edition 11 , A in cross-section approximately C-shaped receptacle formed, which for receiving the edge region of a surface element 10 , preferably a heat-insulating glass pane, is set up. The Dämmaußenschale replaced accordingly the retaining strip 3 in functional terms. Also the investment edge 5 the Dämmaußenschale can accordingly with a seal 6 be equipped, which can rest on the recorded edge region of the surface element.

As a material for the rafter elements 1 . 2 and the outer shell 22 preferably aluminum profiles are used. As material for the insulating strip 7 preferably plastic profiles are used. As heat-insulating material is preferably foam in question. Of course, other materials or material combinations are conceivable here.

In Tables 1 and 2, selected characteristics of rafters according to the prior art and a rafter according to the invention are compared. The surface elements are identical in both cases. It turns out that with the help of the insulating outer shell, much better U _f values of about 1.3 can be achieved. The basics, in particular the same rafter elements, insulating strips, the same surface elements, are kept the same in the calculations, the improvement by the proposal according to the invention is very clear.

The proposed rafter 20 can be from a rafter 13 made according to the prior art. It can, for example, on an existing warm roof 13 the retaining strips 3 removed and the Dämmaußenschale be put on. The Dämmaußenschale on the one hand assumes the function of the retaining strips 3 for fixing the surface elements 10 , In addition, the Dämmaußenschale naturally meets the above-described heat-insulating function. It is also conceivable to maintain the retaining strips, wherein the Dämmaußenschale is simply placed on the free portion of the support profile. The Dämmaußenschale can also be designed so that it also encloses the existing retaining strips. Table 1 heat flow Q 16,49 W / m temperature difference .DELTA.T 35 K Lf _2D 0.471 W / mK paneling average thickness d 37 mm thermal conductivity λ 0,035 W / mK mean U-value up 0.81 W / m ² K length bp 380 mm · Up bp 0,310 W / mK profile sightline b _f 95 mm U _f value U _f 1.7 W / m ² K U _fBW value U _{f, BW} W / m ² K Table 2 heat flow Q 15.02 W / m temperature difference .DELTA.T 35 K Lf _2D 0,429 W / mK paneling average thickness d 37 mm thermal conductivity λ 0,035 W / mK mean U-value up 0.81 W / m ² K length bp 380 mm · Up bp 0,310 W / mK profile sightline b _f 95 mm U _f value U _f 1.3 W / m ² K U _fBW value U _{f, BW} W / m ² K

Claims (15)

Rafters ( 20 ) for a warm roof ( 21 ), in particular a conservatory roof, for receiving surface elements ( 10 ), comprising - a first rafter element ( 1 ), - a second rafter element ( 2 ), wherein - between the first rafter element ( 1 ) and the second rafter element ( 2 ) a heat insulating bridge is arranged, wherein - the rafter with at least one receptacle for the edge region of the surface element ( 10 ), characterized in that the rafter ( 20 ) is at least partially equipped with a Dämmaußenschale with heat insulating properties. Rafter according to claim 1, characterized in that it is in the first rafter element ( 1 ) is an elongated, in cross-section approximately rectangular support profile. Rafter according to one of the preceding claims, characterized in that it is in the second rafter element ( 2 ) around an elongated, flat support profile with at least one support ( 11 ) for the Border area of the area element ( 10 ). Rafter according to one of the preceding claims, characterized in that the insulation bridge a first elongated insulating strip ( 7 ) and a second elongated insulating strip ( 7 ), preferably of a plastic material. Rafter according to one of the preceding claims, characterized in that the insulation bridge is a heat-insulating material ( 9 ), preferably in the form of a foam molding, which is arranged in the cavity, which consists of the arrangement of insulating strips ( 7 ) and sections of the first rafter element ( 1 ) and the second rafter element ( 1 ). Rafter according to one of the preceding claims, characterized in that the Dämmaußenschale an outer shell ( 22 ) and a heat-insulating material ( 23 ) having. Rafter according to one of the preceding claims, characterized in that the Dämmaußenschale the first rafter element ( 1 ) at least partially encloses. Rafter according to one of the preceding claims, characterized in that it is in the outer shell ( 22 ) is an approximately U-shaped in cross-section, elongated profile, preferably an aluminum profile is. Rafter according to one of the preceding claims, characterized in that it is in the heat-insulating material ( 23 ) the Dämmaußenschale to a molded body with heat-insulating properties, in particular foam, is. Rafter according to one of the preceding claims, characterized in that the heat-insulating material ( 23 ) the Dämmaußenschale, in particular the molded body, with a recess ( 24 ), which can be attached to the first rafter element ( 1 ) suitable is. Rafter according to one of the preceding claims, characterized in that a spacer profile ( 25 ) between the outer shell ( 22 ) and the first rafter profile ( 1 ) is arranged. Rafter according to one of the preceding claims, characterized in that the spacer profile ( 25 ) with connection devices ( 26 ) for connection to the first rafter profile ( 1 ) and the outer shell ( 22 ) is set up. Rafter according to one of the preceding claims, characterized in that the receptacle from a portion of the Dämmaußenschale, a portion of the first rafter profile ( 1 ), a portion of the thermal insulation bridge, in particular the insulating strip ( 7 ) and a section of the second rafter profile ( 2 ), in particular the edition ( 11 ) is formed. Rafter according to one of the preceding claims, characterized in that the insulating outer shell with a contact edge ( 5 ), which is a part of the recording for the surface element ( 10 ) and with a seal ( 6 ) for engagement with the surface element ( 10 ). Warm roof, in particular conservatory roof, comprising - a number of rafters, wherein - surface elements, preferably insulating glass plates, are arranged between the rafters, characterized in that the rafters are at least one rafter ( 20 ) according to one of claims 1 to 14.