EP1972734A1 - Retaining body for an insulating board - Google Patents

Abstract

A method for fitting thermal and other cladding to a poured concrete wall has profiled strips (13) backed by a framework (7) which is embedded into the poured concrete. The profiled strips comprise U-shaped ducts onto which the cladding is secured by conventional means. The support framework has a grid type material bent into a wave like structure forming trapezoidal grips. Alternately the framework is made of rod material bent into the wave like structure and applied to the rear of the profiled strips.

Description

The invention relates to a fixing body for an insulating panel of a solid concrete wall, with a lower flange and a truss connected to the lower flange, wherein the lower flange is provided for attachment to the insulating board and the framework for embedding in the concrete core. Under timber is understood as any type of construction of interconnected struts, in which the struts define spaces in which concrete can intervene.

In the conventional production of cast concrete walls, a wall formwork is first made, which is then subsequently filled with concrete. After the concrete has hardened, the formwork is removed. Solid concrete walls usually have only a small thermal insulation effect. It is known to protect building walls against the loss of heat energy on the outside by means of insulation boards. It is customary to glue the insulation boards flat on the hardened concrete and, if necessary, additionally anchor with special insulation board holders. This work is time consuming and cause correspondingly high installation costs. Especially to avoid thermal bridges are to be laid in the dressing insulation boards as close as possible joint and without metallic anchor, extending from the outside extend the insulation board into the concrete wall, frictionally connect with the concrete of the wall.

Furthermore, the use of "concrete formwork elements" is known from the production of concrete foundations, which form an adhesive bond with the foundation during curing of the concrete and are part of the foundation. Hard foam insulation panels have only a limited strength and are therefore not suitable as a formwork element because of their low dimensional stability per se. Only the stiffening by suitable measures allows the use as a "lost formwork element". It is obvious to this purpose to arrange several carrier-shaped stiffening elements, for example lattice girder elements, preferably at the same distance from one another, on a side assigned to the concrete and to firmly and force-lockingly connect with the insulating plate. Such stiffened insulation boards can absorb and discharge the pressure of the fresh concrete. Parts of such stiffening elements can also protrude from the Dämmplattenoberfläche and are thus embedded in the in-situ concrete. These hold the insulation board securely to the concrete wall in addition to the adhesive bond produced by the concrete.

Although conventional lattice girder elements are in principle suitable for the stiffening of insulating boards, they make it difficult to handle the stiffened insulating boards due to their high weight. In addition, they are oversized as a supporting structure for the insulation boards and thus cause unnecessary costs.

The object of the invention is to propose a carrier-shaped fixing body for the stiffening and fixing an insulation board, which has a low weight, easy to attach to the insulation board and is inexpensive to produce.

This object is achieved by a fixing with the features of claim 1. Further advantageous embodiments can be found in the dependent claims.

The fixing body according to the invention, with a lower flange and with a truss connected to the lower flange, has a lower rail as a profile rail from which the truss projects vertically. The rail is intended for connection to the insulation board and the framework for embedding in the concrete.

The rail can be glued with suitable adhesives to the insulation board, so that in a quick and easy way, a positive connection with the insulation board is produced. In addition, no new work techniques must be introduced on the site, since the bonding of insulation boards is common. The attachment of the fixing to the insulation board can of course also be done in other suitable ways. Through the framework with its interstices, a number of openings are formed on the fixing body, which fills the concrete during casting and so holds the fixing after curing. The fixation not only have a stabilizing and a holding function, but they can also be used as a spacer for intended reinforcement grid. Insulating boards with the proposed fixing bodies can be used in addition to the external insulation of walls for their internal insulation as well as for the insulation of floor panels, ceiling and roof structures.

Preferably, the framework has a grid in the form of successive waves. For example, the truss can be made simply by bending or bending a rod. The connection of the shafts with the profile rail is carried out by an adapted to their materials, industry standard fastening method, for example by gluing, welding, riveting, flanging or the like. The fixing body can also be made in one piece, so that no connection technology is required.

Preferred is an embodiment in which the corrugations of the grid are formed by a number of individual, spaced-apart brackets which are arranged one after the other in succession. It is possible to attach the successive stirrups directly adjacent to each other or into another suitable distance from each other on the lower flange. The temples can be out a short piece of a round or flat profile, in particular a reinforcing bar to be made by bending or bending. In this case, the shape of the bracket can be arbitrary per se, as long as the contour is formed so that the bracket can be applied simultaneously with two mutually remote areas on the lower flange for fixation. Apart from the side associated with the lower chord, the contour of the stirrup, in a closed or open manner, can be angular and / or round. Preferred is a substantially trapezoidal embodiment in which a base and two ends of the one-sided open bracket extend parallel to the lower flange and are interconnected by means of two diagonals. The diagonals of the bracket are inclined relative to the base and the ends. In principle, however, the diagonals can also be arranged orthogonal to these. The diagonal inclined ends of the stirrup extend parallel to the base of the stirrup but away from the opposite diagonal, respectively. Conveniently, the bracket is attached with its ends to the lower flange.

Advantageously, the profile rail is a U-profile, the legs of which extend in the direction of the truss or in the opposite direction. A U-profile, whose legs extend in the direction of the framework, is suitable for plate-shaped insulation mats and foamed insulation boards and can be easily attached medium adhesive anywhere on the insulation boards. With a U-rail, the legs of which extend in the opposite direction of the truss, an improved frictional connection and accurate positioning of the fixing can be achieved when the legs are embedded in corresponding grooves of the insulation board and glued or alternatively foamed. Such attachment ensures a uniform distribution of holding forces.

In one embodiment of the invention, the bracket of the fixing body is made by buckling a profile bar and has at least three, preferably four break points, the at least two transverse to the lower flange areas and preferably at least two in the direction of the lower chord determine running areas. In this case, the regions extending transversely to the lower chord, which are also commonly referred to as diagonals, preferably have a same inclination angle with respect to the regions extending in the direction of the lower chord: the regions provided parallel to the lower chord are a base connecting the diagonals and around the free ends of the bracket extending away from the diagonals. Also different angles of inclination of the diagonals are not excluded. The angle of inclination of the diagonal changes depending on the distance from first break points of the bracket that determine the length of the base and second break points that define the lengths of the ends of the bracket. Depending on the distance, the diagonals of a bracket may run parallel to each other or form a peak or obtuse angle with the base. Likewise, the diagonals can be connected to each other only via a single break point, so that the base is not present. Also in this particular case, the diagonals may be disposed at an acute or obtuse angle to each other.

The lower flange and / or the framework of the fixing body according to the invention are preferably made of metal, plastic or a composite material. Other materials are possible. In this case, the fixing body can be made in one piece or assembled from individual parts of the same or different materials.

In particular, can be selected as the material for the rail and the framework of the fixing steel, so that the connection of the framework with the rail is particularly easy to produce by a welding process. The U-profile can be easily made by bending a cold-rolled slit strip and the bracket by bending from a round rod. For a particularly low weight of the fixing body with sufficient stability, a slit strip with a width of 100 millimeters and a thickness of 1 millimeter and reinforcing bar with a diameter of 5 mm is suitable. This can be easily manufactured a low-cost fixation of any length which can also be shortened by simple means quickly in its length. It makes sense for the U-profile a base width of about 80 millimeters between the legs and a leg length of 10 millimeters.

In the following we will explain the invention with reference to an embodiment shown in the drawing. Further features of the invention will become apparent from the following description of the embodiment of the invention in conjunction with the claims and the accompanying drawings.

Figur 1

eine Schnittdarstellung einer mit dem erfindungsgemäßen Fixierkörper hergestellten gedämmten Massivbetonwand;

Figur 2

eine Stirnseitenansicht des Fixierkörpers aus Figur 1; und

Figur 3

einen Ausschnitt des Fixierkörpers aus Figur 1 in Seitenansicht.

The figures of the drawing show the fixing body in a schematic representation. Show it:

FIG. 1

a sectional view of an insulated solid concrete wall produced with the fixing body according to the invention;

FIG. 2

an end view of the fixing from FIG. 1 ; and

FIG. 3

a section of the fixing from FIG. 1 in side view.

FIG. 1 shows a solid by means of a number of insulating panels 1 outside solid concrete wall 2 and with an inner shell 3, in which between the insulating panels 1 and the inner shell 3, a concrete core 4 is arranged in hardened in-situ concrete. The solid concrete wall 2 extends away from a bottom plate 5 upwards and is connected to a connection reinforcement 6 with the bottom plate 5. A planar reinforcing grid, which usually extends parallel to the insulating panels 1 and the inner shell 3 in the concrete core 4, is not shown in the drawing.

In the concrete core 4 is the fixing body 7 according to the invention, as in FIG. 2 is formed substantially T-shaped, embedded with a framework 8, which has a grid 9 of successive waves. The grid 9 is formed by a number of individual brackets 10 arranged in succession. The temples 10, which are in the FIG. 3 increases are shown, have a substantially trapezoidal contour, which is open on one side. The fixing body 7 extend parallel to each other from a lower, upstanding on the bottom plate 5 edge 11 to an upper edge 12 of the insulating panels. 1

Like from the FIGS. 2, 3 can be seen, the fixing body 7 consists of a rail 13, which forms the lower flange and formed by the brackets 10 grid 9. The rail 13 is U-shaped, wherein the FIG. 2 shows that legs 14 of the rail 13 engage in grooves 15 of the insulation board 1 and a web 16 between the legs 14 of the rail 13 rests against the insulation board 1. The truss 8 is arranged orthogonal to the web 16 and extends to the inner shell 3 of the solid concrete wall 2. It supports the inner shell 3 and the insulating panels 1 against each other.

The in FIG. 3 illustrated bracket 10 is made of a round rod, which is cut to length according to the size of the bracket 10 and then bent several times. The round bar 17 has, after buckling, on the profile rail 13 far side, first break points 18 and on the rail 13 associated side, second break points 19. On the side facing the rail 13 side of the bracket 10 is open. The break points 18, 19 determine the lengths of diagonals 20, 21, a base 22 and ends 23 of the bracket 10. The base 22 connects the diagonals 20, 21 between the first break points 18. The ends 23, the second break points 19 are fixed, are oppositely bent and extend parallel to the base 22. At the ends 23 of the bracket 10 is welded to the web 16 of the rail 13.

The diagonals 20, 21 are inclined relative to the base 22 and the ends 23. The angle of inclination 24 in the illustrated embodiment is in each case approximately 110 °. However, the inclination of the diagonals 20, 21 may also differ, in particular also be different. While maintaining the angle of inclination 24 can bracket 10 different heights, with different long diagonals 20, 21 are produced. Thus, the bracket 10 can be easily adapted to different desired thicknesses of the concrete core 4.

Typically, for the rail 13, a steel nip of 1.0 x 100 mm and for the bracket 10 a round steel rod with a diameter of 5 mm used. This allows minimum bending radii of 1.0 mm for the legs 14 of the rail 13 and about 7 to 8 mm for the diagonal 20, 21 of the bracket 10. Depending on the desired thickness of the concrete core 4, the angle of inclination 24 and / or Length of the base 22 between the break points 18 and / or the distance of the second break points 19 to each other and / or the lengths of the diagonals 20, 21 vary. However, it is expedient to provide the length of the ends 23 short, in particular for all heights of the bow equal, with typically 20 to 25 mm.

Claims (6)

Fixing body (7) for an insulating panel (1) of a solid wall (2) made of concrete, with a lower flange (13) and a truss (8) connected to the lower flange (13), wherein the lower flange (13) for connection to the insulating panel (1) and the truss (8) for embedding in the concrete core (4) is provided, characterized in that the lower flange (13) is designed as a profile rail (13) from which the truss (8) protrudes vertically. Fixing body according to claim 1, characterized in that the framework (8) comprises a grid (9) in the form of successive waves. Fixing body according to claim 2, characterized in that the waves of the grid (9) of a number of individual spaced-apart, preferably trapezoidal, one-sided open brackets (10) is formed. Fixing body according to claim 1, characterized in that the profiled rail (13) is a U-profile. Fixing body according to claim 3, characterized in that the bracket (10) is produced by buckling a profile bar (17) and at least three, preferably four buckling points (18, 19), the at least two transversely to the lower flange (13) extending areas ( 20,21) and at least two in the direction of the lower chord (13) extending regions (22, 23) determine. Fixing body according to one of the preceding claims, characterized in that the lower flange (13) and / or the framework (8) made of metal, plastic or a composite material is produced.

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