EP1225282A2 - Heat insulation building element - Google Patents

Abstract

The insulating body (22) has at least integrated pressure elements (23) of concrete with at least two pressure webs (27,28) made by extrusion and running transversely to the longitudinal extension of the insulating body so that an insulating element (29) is formed between the pressure webs in the form of a hollow cavity screened from the building parts. The elements can be cast using a casting mould of plastics. The pressure elements preferably are made from high tensile concrete with fibre reinforcement.

Description

The present invention relates to a component for thermal insulation between two components to be concreted, in particular between a building and a protruding outer part, consisting of one to be installed in between Insulating body with at least integrated pressure elements that are built in State of the component essentially horizontal and transverse to the substantially horizontal longitudinal extent of the insulating body through this run and can be connected to both components.

Such components are, for example, between a balcony and the associated floor ceiling installed to a cold bridge in this area as far as possible to avoid reinforcement bars attached to both components, So on the balcony and on the floor ceiling, by crossing the insulating body are connected, for the necessary transmission of the occurring train, Ensure lateral and compressive forces. As a rule, these reinforcement elements exist in the joint area made of stainless steel, sufficient protection against corrosion offers and on the other hand also has good thermal insulation properties. A disadvantage of the stainless steel reinforcement bars is the high ones Costs, especially if - as is the case with the printing elements - for Achieving a sufficient load-bearing capacity with relative reinforcement elements large cross sections must be used.

In the prior art, solutions for how to do this are already known circumvents the use of stainless steel pressure elements and instead alternative Materials used: For example, DE 34 26 538 proposes that To produce pressure elements from in-situ concrete, these concrete pressure elements both by a low price and by a sufficiently low corrosion resistance distinguished. A disadvantage of these concrete pressure elements however, the comparatively poor thermal insulation properties of concrete, which yes precisely through the use of the component for thermal insulation in the joint area should be avoided.

Proceeding from this, the present invention is based on the object a component for thermal insulation of the type mentioned is available to provide, whose pressure elements are characterized by good thermal insulation properties, good corrosion resistance and low cost.

This object is achieved in that the pressure elements are made of concrete in such a way that they are at least two transverse to the longitudinal extent of the insulating body through these pressure bars and between the pressure bars at least one insulating element in the form of an opposite the concrete components have a shielded cavity.

This results in the advantage of a pressure element that is not only cheaper than stainless steel pressure elements, but with greater load capacity also has better thermal insulation. If in a particularly advantageous The way in which the pressure element is produced by extrusion can be simplified Make cavities in the concrete pressure element that are only for the provide better insulation than stainless steel. In other words the extrusion process enables a lightweight pressure element slim yet stable pressure bars and with a between the Pressure element enclosed insulating element, which in the simplest way from air exists and thus has the best insulation properties.

The lightweight construction is favored by the fact that the pressure elements on their Contact profiles for the introduction of pressure force to the end faces facing the concrete components or have pressure force discharge. These contact profiles extend expediently parallel to the longitudinal extent of the insulating body and are plate-shaped with a vertical facing the concrete components Area at least the size of the area enclosed by the webs Vertical cross-sectional area corresponds. In other words, they should Contact profiles enable a large-area introduction or discharge of pressure and the compressive force on the smaller cross-sectional area pass on the pressure bars. So that the pressure bars of the pressure force better Hold up, the contact profiles connect the at least two pressure bars a profile body, so that the contact profiles give the pressure bars further stability can lend.

In addition, it can be advantageous for manufacturing reasons if the pressure bars connected to each other via a cross strut crossing the cavity are the buckling of the not yet hardened after the extrusion process Prevents pressure element in the area of the slim pressure bars. So how the cross strut can be easily handled by the extrusion process according to the invention can be introduced into the printing elements, without much effort additional stability on the one hand and thermal insulation on the other Favorable constructive measures are taken, which in the usual Stainless steel thrust bearings hardly or only with disproportionately high effort it is possible.

As for the direction of extrusion in the printing element according to the invention, so it is recommended that the cavity face through the contact profiles the concrete components are shielded, i.e. to manufacture the pressure element in such a way that the cavity axis and thus the extrusion direction in the plane of the Insulating body horizontally in the direction of the longitudinal extent of the insulating body or extends perpendicularly to it in the vertical direction.

To enlarge the cavity, it is also recommended that the Pressure elements protrude at least into one of the two concrete components and in this concrete component are anchored, in particular that the cavity on the side of the pressure element projecting into the concrete component approximately to Concrete component can extend and only through the associated contact profile is shielded from this concrete component. This increases it also the length of the pressure bars and thus the thin-walled pressure element area and thus the thermal insulation also improves.

According to the invention, the object stated at the outset can also be achieved by a further embodiment with the features of the preamble of claim 1 solve by using pressure elements made of concrete by casting a lost mold are made. In addition to the above It is therefore recommended to use extrusion processes, cast concrete pressure elements to use. These can be in almost any shape - compared to extrusion - bring even greater variety, so that the concrete pressure element can really be adapted to all requirements. Above all, these requirements are in a relatively large force application area and a relatively small cross-sectional area in the area within the insulating body. The small cross-sectional area can be curved on the one hand especially concave type of the pressure element top and on the other hand also by waisting the pressure elements based on a horizontal cut to reach.

A key benefit of lost by casting using Mold made concrete pressure elements is that you have the concrete pressure elements can be built into the component together with the casting mold and so it also provides an all-round sliding layer for the concrete pressure element or built in, which ensures that the concrete pressure element according to the invention any Relative movements of the two adjacent concrete components without any problems - and "sliding" - can follow; this leads to the important advantage that such Relative movements are no longer associated with significant noise are, when using conventional printing elements due to static friction not between the pressure element and the adjacent concrete component were prevent.

For example, the mold can be made of plastic, which ensures that the concrete pressure element always with a flat and smooth outer surface is in contact with the adjacent concrete component, regardless of whether it is in the mold filled concrete material. Even if this is so grainy or is fibrous, the outer surface formed by the casting mold remains flat and smooth.

The possibility of including both the concrete pressure elements and the mold itself Optimizing their shape can be used, for example, to ensure that the lost mold in the lower foot area of the contact profiles a greater thickness having; this foot area represents the section where the edge pressure is largest, so the larger thickness of the mold in this area for an "elastic coating" and thus for maintaining the sliding layer provides.

In addition, the front contact profiles in vertical longitudinal section be concave in particular so that the concrete thrust bearing too even after setting the adjacent concrete components despite the then taken slight inclination an optimal system to the adjacent Has concrete component by the concave curved area at the vertical Settling movement rolls on the concrete component and thus an articulated connection between the concrete pressure element and the adjacent concrete component Provides.

The production of the concrete pressure element by casting can be done, for example also take advantage of two horizontally adjacent pressure elements in one Mold and to connect to each other via a connection area, so that the double pressure element thus provided between can have a heat-insulating cavity. Overall leaves this design extrudes a reference to the aforementioned Design with two pressure bars and provided between the pressure bars Create cavity with all its advantages.

Figur 1

ein erfindungsgemäßes Druckelement in Draufsicht;

Figur 2

das Druckelement eingebaut in ein Bauelement zur Wärmedämmung in einem Vertikalschnitt;

Figur 3

eine alternative Ausführungsform eines Bauelements zur Wärmedämmung in einem Horizontalschnitt;

Figur 4

das Bauelement aus Figur 3 entlang der Schnittebene IV-IV aus Figur 3;

Figur 5

eine alternative Ausführungsform eines Bauelementes zur Wärmedämmung mit erfindungsgemäßem Druckelement in geschnittener Draufsicht;

Figuren 6 - 8

eine Gießform für ein erfindungsgemäßes Doppeldruckelement in verschiedenen perspektivischen Ansichten;

Figur 9

eine Draufsicht auf die Gießform aus den Figuren 6-8;

Figur 10

eine Seitenansicht der Gießform;

Figur 11

eine Darstellung entlang der Schnittebene A-A aus Figur 9;

Figur 12

eine Schnittdarstellung entlang der Schnittebene B-B aus Figur 9;

Figur 13

eine Schnittdarstellung entlang der ebene C-C aus Figur 10;

Figur 14

eine Schnittdarstellung entlang der Ebene D-D aus Figur 10; und

Figur 15

eine Ansicht der Gießform von unten.

Further features and advantages of the present invention result from the following description of exemplary embodiments with reference to the drawing; show here

Figure 1

a pressure element according to the invention in plan view;

Figure 2

the pressure element installed in a component for thermal insulation in a vertical section;

Figure 3

an alternative embodiment of a component for thermal insulation in a horizontal section;

Figure 4

the component of Figure 3 along the section plane IV-IV of Figure 3;

Figure 5

an alternative embodiment of a component for thermal insulation with a pressure element according to the invention in a sectional plan view;

Figures 6-8

a casting mold for a double pressure element according to the invention in different perspective views;

Figure 9

a plan view of the mold from Figures 6-8;

Figure 10

a side view of the mold;

Figure 11

a representation along the section plane AA of Figure 9;

Figure 12

a sectional view along the section plane BB of Figure 9;

Figure 13

a sectional view along the plane CC of Figure 10;

Figure 14

a sectional view along the plane DD of Figure 10; and

Figure 15

a bottom view of the mold.

FIG. 2 shows an extract of a component 1 for thermal insulation, installed between a building A and a cantilevered outer part B. is and from an insulating body 2 and Reinforcement elements in the form of a pressure element 3. In general the component is extended upwards and carries tension and shear bars there as known per se.

The pressure element 3 has two plate-shaped contact profiles 5, 6 which the end faces of the pressure element facing the two concrete components A and B. 3 are arranged and parallel to the longitudinal extent of the insulating body run. The contact profiles 5, 6 are used for introducing or discharging the Pressure force, the pressure force transmission through the joint between the two Components is provided by two pressure bars 7, 8, accordingly run through the insulating body transversely to the longitudinal extent thereof.

The two pressure webs 7, 8 enclose between them a cavity 9 which acts as an insulating element and only needs to be filled with air.

Characterized in that the pressure element 3 in the concrete component B in the region of the contact profile 6 protrudes, the void volume or the length of the Increase pressure bars and thus the pressure element according to the invention further optimize the thermal insulation provided.

FIGS. 3 and 4 show a component 21 for thermal insulation, whose pressure element 23 differs from the pressure element 3 due to the shape of the extrusion cross section and differentiated by the installation orientation. Like that too Pressure element 3, the pressure element 23 has two on the concrete components A, B facing end faces provided contact profiles 25, 26 and two themselves pressure webs 27, 28 extending between the two contact profiles.

The main differences, however, are that the contact profiles 25, 26 not like a plate parallel to the longitudinal extent of the insulating body are arranged, but instead are arched with a based on the horizontal section approximately circular arc-shaped outer shape. Around the buckling of the pressure webs in the region of the cavity 29 is to be prevented a cross strut 30 connecting the two pressure bars is provided, which the Crosses cavity 29 and divides it into two cavity halves 29a, 29b. About that In addition, the pressure webs 27, 28 are provided with concave curved outer sides and the cavities 29a, 29b, in contrast, are convex. hereby the two webs have approximately a cup shape in horizontal section on that an optimal pressure force transmission with minimal cross-sectional areas and thus enables optimal thermal insulation.

The curved outer shape of the contact profiles 25, 26 has due to its convex The effect is that the pressure element, like a joint, is possibly caused by temperature Relative movements between the two concrete components Rotation or by rolling in the horizontal plane can follow.

An alternative design of the present invention is shown in FIG. 5: There is a component 31 for thermal insulation between a building A. and a balcony B in horizontal section at the level of pressure elements 33a, 33b. There is also an insulating body between building A and balcony B. 32 shown, the left along the between the two components Fugue extends.

The main difference of the pressure elements 33a, 33b compared to that The pressure element from FIG. 3 now consists of a pressure element in each case is replaced by two parallel printing elements, one corresponding smaller force application area in the form of contact profiles 35a, 35b, 36a, 36b need. This results in a double joint similar to a parallelogram linkage, that the displacement path between the contact profiles and the adjacent concrete components further reduced.

Both types of pressure element have in addition to the circular arc Contact profiles also have very similar pressure element cross-sectional shapes, namely, a continuous and seamless from the edges of the contact profiles Transitional goblet-like outer shape that tapers slowly towards the center of the joint and then on the way to the opposite contact profile again continually widened to get there in the edges of the opposite Transition contact profile. This shape ensures optimal force transmission from the balcony plate B into the pressure element, an optimal pressure force transmission with reduced heat conduction through the joint and optimal Pressure force is diverted into building A. The cross sections are designed so that they have the largest possible force transmission area and if possible slim compression force cross-sectional area with mutual continuous Transition a non-kink-resistant, stable pressure element with - due to the small cross-sectional area - nevertheless cheaper thermal insulation result, especially if concrete is used as the material for the pressure element becomes.

A lost casting mold 40 is shown in perspective in FIGS. 6 to 8 shown, which is used for the production of pressure elements made of concrete and but together with the concrete pressure elements in the invention (here Component (not shown) is used for thermal insulation.

Figures 9 to 15 show only the mold 40 and not the concrete pressure elements self; these roughly correspond in their appearance and arrangement the design of Figure 5, but with the lost mold is provided, together with the concrete pressure elements in the component Thermal insulation to be installed, so that is the representation of figure 5 does not transfer directly to the exemplary embodiment from FIGS. 6 to 15 bar.

The casting mold 40 has two to be filled with concrete and in the installed position cavities 41, 42 open at the bottom, which form the shape of the concrete pressure element pretend. Although the two concrete pressure elements are joined together by a casting mold connected, they themselves have no direct connection, that is the concrete is actually limited to the cavities 41, 42 without connecting webs etc. The concrete pressure elements receive one through the casting mold Structure related to both the horizontal section and related tapered towards the vertical section towards the center: using the example of the mold 40 enclosed cavity 41, this means that the concrete pressure element starting of the largest possible cross-sectional and surface area in the area of front curved contact profiles 43, 44 in the direction of the central region 45 is tapered between the two contact profiles; based on a horizontal section recognizable from FIG. 9 or on the in FIG This bottom view shown in FIG. 13 means that in the central region 45 waisted form, while it is in relation to the vertical section shown in FIG a reduced height in the central region 45 means. The transitions from the large surface of the contact profiles 43, 44 to the reduced ones Cross sections in the central region 45 are fluid.

The mold 40 has a connecting region 46 between the two Cavities 41, 42 surrounding cup-shaped individual molds 40a, 40b. In this connection area there is a cavity enclosed by the mold 40 47, which is filled with air and serves as an insulating body. Im neighboring to the connection area 46 between the two individual casting molds 40a, 40b arranged area is a recess 48 for receiving a transverse force rod provided which is in the space between the two Immersed pressure elements and is fixed there on the mold.

The casting mold has vertically extending webs 49, 50 on its outside, which are provided when an adjacent double pressure element is attached laterally with a correspondingly constructed casting mold Seal the space between the two molds by each the individual webs 50 in the space between the two double webs 49 immerse. This can prevent liquid concrete from getting into the gap flows between the two molds and their function is impaired.

The casting mold 40 also has on the edge of an end contact profile 43 on a T-shaped web in horizontal section, which is provided for into the adjacent concrete component - especially one in a precast plant protruding molded filigree plate and anchored with this form-fitting become. Because in contrast to previous pressure element designs, the form-fitting that was anchored in the adjacent concrete components rolling contact profile the disadvantage, no connection in the direction of pull To make available what is particularly relevant for transport; therefore the T-shaped web 51 serves as a tension band for the transmission of tensile forces between Casting mold or associated pressure elements and adjacent concrete component.

Finally, when looking at FIGS. 6, 7 and 13, it is also noticeable that the Casting mold has hole-like recesses 52 on its upper side; these serve to promote the escape of air when casting the pressure elements; They also ensure a positive connection between the mold and concrete pressure element due to concrete material emerging from the openings 52 and thus serve as transport and loss prevention and prevent the falling out of the pressure elements from the mold when the mold is oriented so that the cavities 41, 42 are open at the bottom and the Pressure elements could fall out.

Finally, the mold has hook-like locking lugs 53 on its underside on, which serve the casting mold on a the component for thermal insulation to lock and fix on the underside of the surrounding rail.

It should also be mentioned that the pressure elements in the area of the contact profiles 43, 44 with its lower foot region 43a, 44a further into the associated component (A, B) protrude as with their upper head region 43b, 44b. In addition, the casting mold 40 acting as a sliding layer for the contact profiles in the lower foot region 43a, 44a with a greater thickness, since in this area Loads due to edge pressure are highest.

In summary, the present invention offers the advantage of an optimized one Printing element that is easy due to the production by extrusion provided with cavities and thus can be manufactured in a lightweight construction. As a result you get a pressure element with improved thermal insulation properties, better load capacity and at the same time low manufacturing costs.

Claims (18)

Component for thermal insulation between two components, in particular between a building (A) and a projecting outer part (B), consisting of an insulating body (2, 22) to be laid between them with at least integrated pressure elements (3, 23), which are in the installed state of the component run essentially horizontally and transversely to the essentially horizontal longitudinal extent of the insulating body and can be connected to both components,
characterized in that the pressure elements (3, 23) are made of concrete in such a way that they have at least two pressure webs (7, 8, 27, 28) running through the insulating body (2, 22) and at least one between the pressure webs Have insulating element (9, 29) in the form of a cavity shielded from the components (A, B). Component according to Claim 1,
characterized in that the concrete pressure elements (3, 23) are produced by extrusion. Component for thermal insulation between two components, in particular between a building (A) and a cantilevered outer part (B), consisting of an insulating body (32) to be laid between them with at least integrated pressure elements (33a, 33b), which are essentially in the installed state of the component run horizontally and transversely to the essentially horizontal longitudinal extent of the insulating body and can be connected to both components,
characterized in that the pressure elements (33a, 33b) are made of concrete by casting using a lost mold (40). Component according to Claim 3,
characterized in that the concrete pressure elements (33a, 33b) are built into the component together with the casting mold (40). Component according to at least one of claims 3 or 4,
characterized in that the mold (40) consists of plastic. Component according to at least one of the preceding claims,
characterized in that the pressure elements (3, 23, 33a, 33b) have contact profiles (5, 6, 25, 26, 43, 44) on their end faces facing the components (A, B) for the introduction and / or discharge of pressure forces. Component according to Claim 6,
characterized in that the contact profiles (5, 6) extend parallel to the longitudinal extent of the insulating body (2, 22) and are plate-shaped. Component according to Claim 6,
characterized in that the contact profiles (25, 26, 43, 44) are arched in the form of a circular arc in horizontal section and project with their arched region into the components (A, B). Component according to one of the preceding claims 6 to 8,
characterized in that the vertical surface of the contact profiles (5, 6, 25, 26) facing the components (A, B) corresponds in size at least to the vertical cross-sectional area enclosed by the pressure webs (7, 8, 27, 28). Component according to at least claims 1 and 6,
characterized in that the contact profiles (5, 6, 25, 26) connect the at least two pressure webs (7, 8, 27, 28) to form a profile body. Component according to at least claims 1 and 6,
characterized in that the cavity (9, 29) is shielded from the components (A, B) by the contact profiles (5, 6, 25, 26). Component according to at least claim 1,
characterized in that the pressure webs (27, 28) are connected to one another via a cross strut (30) crossing the cavity (29). Component according to at least claim 3 and claim 6,
characterized in that the lost casting mold (40) has a greater thickness in the lower foot region (43a, 44a) of the contact profiles (43, 44). Component at least according to claim 3 and claim 6,
characterized in that the front-side contact profiles (43, 44) are, in particular, concavely curved in the vertical longitudinal section. Component according to at least claim 3,
characterized in that two horizontally adjacent pressure elements are connected to one another via a connecting region (46). Component according to at least one of the preceding claims,
characterized in that the pressure elements (3, 23, 43, 44) protrude at least into one of the components (A, B) and are anchored therein. Component according to at least claims 1 and 6,
characterized in that the cavity (9, 9a, 9b) extends on the side of the pressure element (3) projecting into the component (B) to approximately the component (B) and is shielded from it by the associated contact profile (6). Component according to at least one of the preceding claims,
characterized in that the pressure elements (3, 23, 43, 44) are made of high-strength concrete with in particular fiber reinforcement.

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