WO2006027115A1

WO2006027115A1 - Device for securing insulating elements to the substructure of a roof and to the building roof

Info

Publication number: WO2006027115A1
Application number: PCT/EP2005/009219
Authority: WO
Inventors: Gerd-Rüdiger Klose
Original assignee: Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg
Priority date: 2004-09-07
Filing date: 2005-08-26
Publication date: 2006-03-16
Also published as: DE202005011212U1; WO2006027115B1

Abstract

The invention relates to a device for securing insulating elements to the substructure of a roof, in particular, profile sheets, made of at least one profiled rail which comprises two limbs which extend essentially at a right-angle in relation to the web, and which is embodied as a U-shape, essentially, in the cross-section and also a web. In order to produce a device which secures insulating elements to the substructure of a roof which can be joined in a simple manner to an insulating layer, in particular to insulating material plates made of mineral fibres, without requiring prior work and/or without fundamentally damaging the device during construction, the profiled rail (2) comprises tongues (20) which can bend in the region of the web (3), said tongues being regionally separated from the profile rail (2) by punched-out sections (21).

Description

Device for fastening insulating elements on a roof substructure and building roof

The invention relates to a device for fastening insulating elements on a roof substructure, in particular made of profiled sheets, consisting of at least one substantially in cross-section U-shaped and thus having a web and two substantially perpendicular to the web extending leg profile rail. Furthermore, the invention relates to a building roof, consisting of a roof substructure, in particular profiled sheets and a thermal insulation layer of Dämmstoffele¬ arranged thereon, preferably made of resistant Mineralfaserdämmstoffelementen, and at least one device for fixing the insulating elements on the roof substructure, which at least a substantially in cross-section U-shaped and thus a web and two substantially recht¬ angled to the web extending leg having rail and Befesti¬ transmission elements with which the rail is connected to the Dachunterkonstruk¬ tion.

Lightweight thermally insulated Flachdachkonstruktio¬ NEN known from the prior art, which often form the upper end of a building, beispielswei¬ se a manufacturing and / or a warehouse, a meeting or the like and have a supporting roof shell, for example, from profiled steel sheets is composed of shells of local concrete, wood and wood-based materials, concrete or lightweight concrete elements. In order to achieve a reliable drainage of precipitation from the flat roof construction, the roof shell, in particular the profiled steel sheets, is fastened with a sufficient gradient on a correspondingly designed substructure, taking into account the sag of the easily deformable roof shell. The steel sheets have a profiling, which is placed in the direction of slope, ie in the direction of ridge eaves or transversely thereto. In order to reduce water vapor diffusion from the building interior into the flat roof construction and to reliably prevent air exchange via the flat roof construction, an airtightness layer is arranged above the load-bearing roof shell, which layer usually consists of relatively thin plastic or plastic-metal composite foils which loosely laid or glued auf¬ on a top example here vor¬ made flat roof construction on top chords of the profiled steel sheets. Quite essential here is a permanently airtight connection of the airtightness layer with adjacent components or in the region of Durch¬ conditions.

On the airtightness layer, a heat-insulating layer is arranged, for example, consists of large-sized non-combustible rock wool Dämmstoffelemen¬ th with a melting point of 1000 ⁰ C according to DIN 4102 Part 17. These insulating elements must have the strength values required for the application type WD according to DIN 18165-1 or the application field DAD-dm according to DIN V 4108-10 and, for example, a compressive stress ≥ 40 kPa, a tensile strength perpendicular to the plate plane ≥ 7.5 kPa and a point load capacity at 5 mm compression ≥ 500 N.

Rock wool insulation elements consist of mineral fibers bound with binders, the proportion of binder being limited by the requirements for non-combustibility of such insulation elements. In order to be able to achieve the above-mentioned strength values, therefore, a sufficiently large proportion of fibers is required, that is to say the bulk densities of insulating panels formed from the insulating elements are usually more than about 120 kg / m ³ , with the individual mineral fibers also being combined into one As steep as possible Lage¬ tion are brought to the large surfaces of such insulation boards.

In order to arrange the mineral fibers in an appropriate orientation, that is to say the steepest possible storage to the large surfaces, a mineral fiber web impregnated with binders and additives is subjected to intensive lapping. The binders used are mixtures of duroplastic hardening phenol, formaldehyde and / or urea resins, which rem small proportions of adhesion-promoting silanes. The binder quantities are limited to less than 12% by mass in order to obtain the character of a non-combustible insulating material. As a rule, insulating materials are produced from mineral fibers having a binder content of at most 4.5% by mass. As additives hydrophobic mineral oils, silicone oils and resins and / or organically modified silanes are provided. These additives also impart a slight adhesion of the mineral fibers to one another, thus reducing the release of fine constituents and mineral fiber fragments of the insulating material, but are not considered as binders in the strict sense.

Mineral fiber insulating elements are produced from mineral fibers deposited on a conveying device and defiberized from a melt. The mineral fibers deposited on the conveyor are aligned substantially parallel to the large surfaces of the mineral fiber web designated as the primary web. The primary nonwoven is then unfolded and subjected as a secondary web to intensive upsetting in the conveying direction and / or at right angles to the large surfaces of the secondary web. The structure of the secondary web obtained in this case is then fixed in a curing oven by curing or solidification of the binder. Due to the compression in only two directions, the mineral fibers remain transverse to the conveying direction predominantly in horizontal storage. This orientation of the mineral fibers results in that the bending tensile strength in this direction is substantially three times as high as in the conveying and / or unfolding direction. The relative deformability, that is also the lower shear strength in this direction is accompanied by a higher cleavability of the secondary nonwoven. After this secondary web individual sections are separated as insulation panels. These insulating panels are normally separated in a width adapted to the means of transport of typically 1.2 m, the length of the panels of insulating material corresponding to the width of the secondary fiber web of, for example, 2 m. In order to take advantage of the high bending tensile strength in the longitudinal direction, the insulating panels are laid generously transversely to the profile direction of the steel sheets. The steep storage of mineral fibers leads to a high compressive strength and point load capacity of the insulating fiber board produced from the mineral fiber sheet on a flat surface. However, since point loads on the lower chords of the profiled steel sheets lead to considerable shear stress in the insulating board, it can lead to damage to the insulation layer right through to the breaking of the individual insulating boards, precisely because of the orientation of the mineral fibers. Although the relatively heavy and resilient mineral wool insulating panels lead due to their own weight to zu¬ additional, albeit uniform deformation and thus ultimately to a flat surface of the thermal barrier coating, but at the same time dampen the mineral wool insulation panels triggered by wind loads Schwin ¬ conditions of the roof shell clearly.

Above the thermal barrier coating, the actual sealing of the flat roof construction is arranged, which often consists of webs of plastics or elastomers or glued-on bituminous membranes. These webs are usually 1 m or 1, 2 m wide and are peripherally connected by means of screws through the Wär¬ medämm- and the air-tightness layer through with the supporting roof shell. If the roof shell consists of the above-described profiled steel sheets, the connection of the webs is always effected in the region of the upper belts of the steel sheets, that is to say in the areas of the steel sheets resting against the thermal insulation layer or the air-tightness layer. For this purpose, self-tapping screws are used, the tips of which are designed as drills and whose average pull-out values are generally dependent on the sheet thickness and the shape of the thread or a molded sheet bead and are on average 0.2 kN.

The self-drilling screws have a second thread below a head. The contact pressure on the airtightness layer and the thermal barrier coating which is appropriate for the material is usually effected by means of an elongate metal plate stiffened in itself with rounded narrow sides which have dimensions of, for example, 40 mm × 82 mm. To carry out a drilling screw, the metal plate has a centroid Rale bore, wherein the metal plate in the region of the bore is ausgebil¬ det such that the head of the drill screw sunk in the plate is arranged.

In addition to the already mentioned above second thread of the drill screw below its head, the drill screw on a first upper thread, which prevents passage of the head through the roof seal, namely arranged on the thermal barrier coating webs. The screws are arranged at the edges of the tracks in rows so that a next track of the roof seal is passed over the screws and peripherally connected to the already mechanically fastened path by gluing or welding. By overlapping adjacent webs of the roofing the screws are covered.

Flat roof constructions of the embodiment described above have in their edge and corner areas higher wind suction loads, so that the de Abstän¬ between the rows of screws significantly reduced and has to be lifted, the number of screws 8 and 12 per m ^2. The screws are belted, so that the setting can be done with the help of powerful motorgetrie¬ benen screwdrivers. This approach has largely pushed the use of conventional pressure transmitting rails with corresponding holes for the screws in the background.

The resistance of the attachment of the thermal barrier coating is largely determined by the strength of the insulating elements. This strength of the insulating elements is not constant, but falls under the effects of pressure, train, humidity, temperature and time, so that over time sets a ge compared to the initial level lower strength. At high initial strength values, it is therefore attempted to at least partially compensate for this reduction in strength. For this purpose, high pretensions are selected by tightening the self-tapping screws with a high tightening torque, so that the pressure-compensating metal plates are drawn into the insulating elements even with insulating elements of high strength. As a result, unwanted accumulations of water and Dirt deposits at these points on the roof waterproofing. In order to avoid this effect, insulation boards made of mineral fibers are used, which have an approximately 15 to about 25 mm thick, mostly 180 to 220 kg / m ³ compressed Ober¬ surface layer and therefore allow relatively high point loads. Nevertheless, the large number of metal components installed in such a flat roof construction, in particular the many self-tapping screws, leads to greater heat losses, even with higher insulation thicknesses adapted to the increased requirements for thermal insulation, since the self-tapping screws form thermal bridges even in the arrangement described above ,

From the prior art inclined roof structures are also known, which are often covered with sheets of, for example, aluminum, copper, titanium zinc, galvanized galvanized steel, austenitic steels, lead or the like. The individual cover elements are called coulters and formed from strips and sheet metal. Here, folding and strip roofs are differentiated. In Falzdä¬ chern the connection of the individual shares with each other is usually in the form of single or double standing seams or Winkelelfalzen. The attachment of the shares is done by adhesive. Fixing and sliding or sliding joints are designed, the latter intended to allow thermally induced longitudinal movements of the coulters. The adhesives consist of narrow metal strips and are made of suitable materials with prescribed minimum thicknesses ≥ 0.4 mm for stainless steel,> 0.6 mm for galvanized steel sheet and ≥ 0.7 mm for titanium zinc or> 0.8 mm for aluminum , The sliding covers have either elongated holes or a correspondingly movable upper part, in order to allow movement of the shares relative to the adhesive.

For the attachment of the coulters holder are provided, which have a correspondingly designed headboard. An example of such a holder is described in DE 297 12 794 U1. This known holder consists of a head part for supporting the shares and a foot part for coupling the holder with a support structure. Between the head part and the foot part, a connection back is provided. The foot part is arranged in a support element, which is movably coupled to the foot part. The foot part can be plate-shaped or be formed round in cross-section, wherein the support member has a korres¬ ponding shaping.

The adhesives and holders are integrated in a seam connection between adjacent shears and are welded together in the case of a welded connection with the coulters. The holders are connected, for example by means of countersunk screws with the ground.

Width and length of the shares, material thickness, number and distance of the adhesive are specified for example in DIN 18339. Standard blade sizes of blades are 520, 620, 720 and 920 mm. The number and the distance of the adhesive from each other depend on the coulter width, length, the building height, the location within the roof area and amount to <500 mm to 210 mm to about 4 to 8 pieces per m ² . The adhesives usually have a constant length, so that deflections of the supporting roof shell are transmitted to the roofing.

In inclined roof structures, a vapor-damping airtightness layer is likewise provided, on which the thermal barrier coating is arranged, which consists, for example, of rollable lightweight mineral wool insulating felts. The individual layers of mineral wool Dämmfilze, as far as the bases of the adhesive and these allow themselves, largely densely pushed.

On the thermal barrier coating, a separating layer may be provided for damping precipitation-induced acoustic interference, for condensate drainage and for reducing the risk of corrosion of the metal parts being processed, which consists of interlaced plastic fibers on a water-vapor-permeable, but water-repellent plastic random fiber fleece ¬ lays. However, such a roof construction has significant disadvantages, since the Hafte used in large numbers represent massive thermal bridges. Their heat-conducting effect can only be reduced by placing them on less thermally conductive layers or on hollow bodies made of synthetic or mineral fibers. EP 1 445 395 A1 discloses profiled elements which are essentially U-shaped in cross-section, so that these profiled elements have two legs and a web connecting the legs, the legs being oriented at right angles to the web. At least one leg has a cutting edge at its free end, which makes it possible to insert the leg in a simple manner into an insulating board, in particular a mineral fiber insulating board with a density of 120 kg / m ³ . It can be provided that for this purpose a groove is milled into the insulation board. In addition, the leg has a bead extending in the longitudinal direction of the profile element, which makes it possible to reduce the material thickness of the profile element to less than 1.6 mm, without thereby causing strength problems in the region of the limb to be inserted into the insulating plate. The limb is pressed into the insulation panel so far that the limb is sunk slightly into the surface of the insulation panel in order to form a flat surface of an insulating layer.

Attached to such a profile element are adhesions which, in cross-section, are substantially Z-shaped in the cross-section and rest with one leg on the web of the profile element. The attachment of the adhesive on the profile element is effected by embossing at two points, so that a rotation of the adhesive is difficult relative to the profile element. Such profile elements are laid at a distance vonein¬ and parallel to each other, wherein the profile elements are aligned at right angles to the longitudinal direction of the shares. But it is also possible to arrange the profile elements at any angle to the longitudinal axis of the shares.

Furthermore, from DE 44 18 890 A1 discloses a substructure for clam shell roof systems is known, which is suitable in the same way for roofing of bricks, TYA pezblechen, Welleternit or a Spenglerfalzdach. This Unterkon¬ construction for a two-shell roof system has a thermal barrier coating, which rests with the interposition of a vapor barrier on the upper chords of a lower Tra¬ pezbleches. In the thermal barrier coating are in cross-section U-shaped Profiles are used, which are connected by screws with the trapezoidal sheets. The thermal barrier coating consists of impact-resistant mineral fiber insulation boards with a density of 120 kg / m ³ .

Another roof construction and a method for sealing a roof is also known from DE 195 49 026 A1. The roof structure according to this document has in cross-section U-shaped profile elements, which are connected via rivets with a arranged below a thermal barrier coating roof shell of trapezoidal in cross section steel sheets. The profile elements thus have a web and two parallel aligned, arranged at the end of the web leg, which can be pressed into the thermal barrier coating. The thermal barrier coating consists of impact-resistant mineral fiber insulation panels which can be walked on without significantly deforming under the load of the installation personnel. By using rivets with greater extension values than screws, it is possible to reduce the number of connecting elements between the profile elements and the roof shell, so that the number of possible thermal bridges is also substantially reduced. On the outer surfaces of the profile elements, sealing or gluing roof sealing materials are arranged which can be connected to roof sealing webs arranged thereon.

The main disadvantage of the profile elements previously known from this prior art is that they can not be pressed into the desired form and not with a high processing speed into the mineral wool insulation boards described as being resistant to treading. There is a risk that the profile elements and / or the insulating panels are damaged or destroyed when pressed into the thermal insulation layer, so that the expected properties of the individual construction elements are not met. The pressing in of the profile elements in the thermal barrier coating is usually done with the foot, so that moreover also the roof sealing materials arranged on the bridge can be damaged or removed. In order to avoid these disadvantages, it is usual in the practical design of a corresponding roof construction that grooves are cut into the surface of the previously designed thermal insulation layer before the introduction of the profile elements. For this purpose, special machines are used, so that the grooves can be cut straight and at a constant distance from each other. The cutting of the grooves, however, represents a time-consuming procedure and can only be carried out by well-trained experts.

With a width of the web of a profile element of well below 100 mm and accordingly close to each other lying grooves also results in an island-like section. As a result, the pressure-distributing effect of a highly compacting surface layer of the insulating elements is largely eliminated. With grooves milled transversely in inclined thermal barrier coatings, the inserted profile element can only be supported on the highly compressed surface layer with the legs lying deeper, since the shear strength of the insulating element formed by the milled-in grooves is low.

Finally, from EP 0 969 160 A2 a further roof construction is known which has a load-bearing substructure, a covering of profiles and corresponding holders and bolt-shaped fastening elements, wherein the holders are connected to the substructure via the fastening elements in a tension-resistant manner. In this roof construction, a modular belt is provided, which rests on the substructure and has a dimensionally consistent graduation corresponding to the module dimension of the profiled sheet, the holders being placed on the modular belt in accordance with the division. With this building roof, the milling in of grooves is avoided. However, the edges of the module band are slightly bent, with the module band engaging with the bent regions in the surface of the insulating material layer without damaging this insulating material layer. The slight intervention of the bent regions of the module band results in the module band being immovably arranged on the thermal barrier coating after the fastening elements, namely the screws, have been tightened. Based on this prior art, the invention has the object of the invention to provide a device for fixing insulating elements on a roof substructure, which is easily connectable with a thermal insulation layer, in particular with thermal insulation panels of mineral fibers, without requiring previous work here or without the risk of fundamental damage to the device during installation. In addition, it is an object of the invention to further develop a generic building roof in a corresponding manner, namely such that the assembly of the individual construction elements is possible in a simplified manner, in particular in connection with a thermal insulation layer.

In the case of a device according to the invention for fastening insulating elements to a roof substructure, the problem of this task is that the profile rail has bendable tongues in the area of its web which are separated from the profile rail in some areas by punching.

According to the invention, the profiled rails have bendable tongues in the area of their web, which tongues are separated in some areas by stamping out through the profiled rail. These tongues can be bent on the construction site and inserted into the insulating panels.

According to a further feature of the invention, the tongues can also have corrugations and / or indentations in conformity with the web or the legs of the profiled rail.

A further embodiment of the deflectable tongue provides that the tongue is connected via a bending line with the rail and that the Biegeli¬ never opposite free end of the tongue has a cutting surface, which is stabbed ein¬ in normal use of the rail in the insulation board. Preferably, the cutting surface of the tongue is V-shaped ausgebil¬ det. It can also have a serrated edge. In a development, it is provided in a device according to the invention that extends the bead, starting from the cutting surface in the direction of the bending line, wherein the bead is preferably aligned perpendicular to the bending line running. This embodiment stiffens the tongue.

A development of the device according to the invention has two retaining clips which are substantially U-shaped in cross-section and thus have a web and two legs aligned at right angles to the web, wherein the width of the web between the legs is greater than the width of the web Web of the rail is formed. The retaining clips serve to overlap the profile rail and to anchor it in the thermal barrier coating. It has been found that the profile rail can then be ausgebil¬ det with relatively short legs, since the anchoring of the rail in deeper areas of the thermal barrier layer via the retaining clips. The mounting of the profile rail is considerably simplified by the relatively short retaining clips, since the handling of the short retaining clips takes place during assembly over a relatively short length of the profile rail. In addition, in this embodiment, the rail with a relatively short retaining clip in a first area fest¬ laid and then aligned before the rail is then set with other Halteklammem. This is particularly advantageous when the profile rail has a great length of, for example, three or more meters.

According to a further feature of the invention, it is provided that the material thickness of the retaining clips is greater than the material thickness of the profile rail ausge¬ forms, since ultimately the attachment of the rail via the retaining clips. The greater material thickness of the retaining clips is also possible because they are formed only relatively short, so that the impressions of Halte¬ brackets is easily possible even in heat insulation elements with high density with the foot or possibly with a hammer.

Preferably, the retaining clips in the region of their webs on at least one opening, the receiving a fastener for connecting the Use retaining clips with the rail. By means of these fastening elements, the retaining clips are also fixed in the longitudinal direction of the profile rail.

It is provided according to a further feature that the retaining clips in the region of their webs have beads which extend substantially parallel to an edge between the web and a leg of the retaining clip. These beads also have the task auszusteifen the webs of the retaining clips.

The division of the leg of the rail into several sections, which are separated by recesses, leads in a development to the fact that the installation of the rail is significantly simplified in a thermal barrier coating with relatively high density, since the resting during insertion of the rail in the thermal barrier coating surface of the thigh is reduced. The stability of the profiled rail is additionally increased by arranging at least one bead and / or one embossment in the region of the web connecting the legs. The rail can therefore be easily in such heat insulation without the risk of damage, such as twisting impression, if previously no grooves have been milled. This results in a significant reduction in work in the construction of a building roof according to the invention, in which case the use of a large number of technically well-trained assembly workers is no longer necessary. The Mon¬ days of the device according to the invention can be accomplished in a simple manner by non-trained assembly forces.

Further features and advantages of the invention will become apparent from the Vorrich¬ device or the building roof further developing sub-claims. More specifically, the following is done:

In a device according to the invention, it has proven advantageous in the course of a further development to arrange the bead in the region of the transition of the web into the leg. For this purpose, in particular, this transition region aus¬ gestift, so that the mounting of the rail without risk of damage, such as the bending of the legs relative to the web in a simple manner can be performed by the rail can be introduced by depressing the foot in the insulation layer.

Accordingly, it is advantageous that the web has two beads, which are each arranged in the region of the transition of the web into a leg.

According to a further feature of the invention, it is provided that the profile rail is made of metal, in particular light metal, for example aluminum or of corrosion-protected steel, for example galvanized steel or stainless steel. Such a profile rail is light, corrosion-resistant and sufficiently rigid, so that its processing is considerably simplified. As a material thickness, a thickness of 0.6 to 3 mm, in particular of 1 to 1.5 mm, has proved to be advantageous in the case of such a profile rail.

Instead of beads or in addition to beads indentations can vorgese¬ hen, which also serve the stiffening of the web of the rail, which according to an advantageous embodiment, these indentations are flat. Alternatively, it can be provided that the indentations are formed linear and are in particular aligned obliquely to the longitudinal axis of the profile rail. Of course, impressions of planar and linear configurations can also be provided together, wherein, for example, an alternating arrangement of areal and line-shaped impressions with regard to the stability of the profile rail is advantageous.

A development of the embodiment of the device with indentations provides that several indentations are arranged at uniform intervals over the length of the profile rail.

According to a further feature of the invention, it is provided that the profiled rail has several openings in the region of the web for receiving fastening elements, in particular screws. This configuration gives the assembly personnel the arrangement and the number of fastening elements, so that, as a rule, with sufficient fastening of the profile rail can be expected. The openings are preferably arranged in the region of the impressions, so that they are already recessed relative to the main surface of the web of the rail. If, for example, screws are inserted into these openings, then the screw heads are usually already below the above-mentioned main surface of the web of the profile rail.

In addition, it can be provided that pressure equalization plates are inserted into the indentations, which holes have coaxial bores with the opening. Such a configuration results in that the profiled rail can be produced from a plastic, wherein the tightening torques of the screws used in the assembly of the profiled rails are distributed over the pressure compensating plates to a larger surface of the profiled rails, so that the danger is reduced by einreßen¬ the holes or openings. On the other hand, if the profiled rail is made of metal, the pressure equalization plates make it possible to design the profiled rail with a lower material thickness without the risk that only the tightening torques will bend or otherwise damage the profiled rail in the region of the openings.

A further embodiment of the device according to the invention provides that the sections separated by recesses have a width between 10 and 100 mm, in particular between 25 and 50 mm and a length between 3 and 50 mm. Such formed sections can also be pressed into mineral fiber insulating boards in a simple manner, even if these mineral fiber insulating boards have a high bulk density or a highly compacted surface layer.

Preferably, the sections have at their free ends a cutting edge and / or a V-shaped tip, in particular, in order to simplify the impressions of the sections into the mineral fiber insulating boards by generating a high pressure through a small contact surface. It is provided according to a further feature of the invention that the Ab¬ cut formed at their free ends bevelled and / or have a angeschlif¬ fene wave structure. This embodiment also has the advantage that the installation of the profile rails, in particular the impressions of the legs of the profile rail in a thermal barrier coating is substantially simplified.

A sufficient connection of the profile rail with a heat-insulating layer arranged underneath is already achieved if the sections are formed on opposite legs of different lengths and / or widths. Thus, the sections of a leg may have a large and deep in the thermal insulation layer engaging length, while the sections of gegen¬ overlying leg are relatively short and serve only the leadership of Profil¬ rail in the thermal barrier coating, so that these short sections only be pressed relatively low in the thermal barrier coating.

Another embodiment of the invention provides that the sections are aligned at an angle 45 ° <α <90 ° relative to the longitudinal axis of the web. In addition, the sections can include an angle β> 90 ° with a web, so that profiled rails formed in this way can be stacked in a simple manner, so that the storage space required for the mounting of such profiled rails is reduced.

It is provided according to a further feature of the invention that the Ab¬ sections each have at least one extending in the direction of its longitudinal axis bead and / or indentation. Such a beading or embossing increases the stability of the section, so that it is not damaged, in particular bent, when pressed into a heat-insulating layer with a high density. The bead or the embossing furthermore make it possible for the sections to be produced with a low material thickness or from a plastic material.

Preferably, the beads and / or embossments are formed from section to section up to the transition region in order to stiffen the section over its entire length. On the part of the building roof according to the invention, in order to solve the task described above, provision is made for the rail to have bendable tongues in the region of its web which are separated from the profile rail in some areas by punching.

The above-described developments and refinements of the device according to the invention lead to matching advantages in a building roof according to the invention, so that reference is made to this with regard to the subclaims which further develop the building roof.

Further features and advantages of the invention will become apparent from the following description of the accompanying drawings, are shown in the preferred embodiments of a device according to the invention for use in a building according to the invention roof. In the drawing show:

Figure 1 shows a first embodiment of a metal strip for forming a profile rail in a plan view;

Figure 2 shows a second embodiment of a metal strip for forming a profile rail in a plan view;

Figure 3 shows a third embodiment of a metal strip for forming a profile rail in a plan view;

Figure 4 is a formed from the sheet metal strip in Figure 1 rail in a sectional side view taken along the section line IV-IV in Figure 1;

FIG. 5 shows a fourth embodiment of a profile rail in a sectioned side view; Figure 6 shows a fifth embodiment of a metal strip for forming a profile rail in a plan view;

FIG. 7 shows a sixth embodiment of a profile rail in a top view;

Figure 8 shows the rail according to Figure 7 in a cut shown

Side view;

9 shows a profiled rail with a retaining clip in a plan view;

FIG. 10 shows the profiled rail with the retaining clip according to FIG. 9 in a side view;

Figure 11 is a retaining clip in plan view;

12 shows the retaining clip according to FIG 11 in a side view and

13 shows the retaining clip according to FIGS. 11 and 12 with a profiled rail in a side view shown in section.

1 shows a first embodiment of a metal strip 1 for Ausbil¬ tion of a rail 2 is shown in a plan view. The profiled rail 2 is shown in cross-section in FIG. 4 and consists of a web 3 and two ends arranged on the web 3 and aligned at right angles to the web 3

Legs 4, which are aligned in the same direction. According to FIG. 1, the legs 4 consist of cut-offs 6 which are separated from one another by recesses and which have a V-shaped end 7 in the form of a cutting edge.

The sections 6 are bendable by 90 ° relative to the web 3 along a bending edge 8 (FIG. 1), so that the sections 6 according to FIG. 4 are aligned with the web 3. Each section 6 has in the region of the bending edge 8 a transition from Bridge 3 in the section 6 stiffening imprint 9, which is formed substantially round or oval.

The web 3 has two beads 10 running parallel to one another and in the longitudinal direction of the web 3, which beads are arranged adjacent to the bending edge 8. The beads 10 stiffen the web 3 of the rail 2. In cross-section, the beads 10 are semicircular, wherein they extend starting from the web 3 in with the direction of extension of the legs 4 and 6 sections mend direction.

Between the beads 3 openings 11 are arranged, which are arranged at regular Ab¬ stands on the central axis of the web 3. The openings 11 den¬ NEN the inclusion of fasteners not shown in detail, in particular special screws with which the profile 2 is connected by a likewise unspecified Asked insulation layer with a roof substructure.

The openings 11 are arranged in the region of indentations 12, which surround the run¬ the openings 11 concentric and are also round. The impressions 12 serve to receive heads of the screws, so that they are arranged below a surface 13 of the web 3.

It can be seen from FIG. 1 that the sections 6 are formed identically on opposite bending edges 8 of the profiled rail 2 and thus also have a matching length according to FIG. The sections 6 of opposite bending edges 8 of the profiled rail 2 are offset relative to one another such that the sections 6 of a bending edge 8 are arranged opposite the recesses 5 of the opposite bending edge 8. The recesses 5 can have a width that corresponds to the width of the sections 6 and can be formed with a larger, in particular double, width relative to the width of the sections 6. The rail 2 is made of galvanized steel and has a material thickness of 1, 1 mm. This material specification and material thickness are also with regard to the embodiments described below of a device for fastening insulating elements on a Roof substructure applicable. In this regard, in the embodiments of the device described below for identical Konstruktions¬ elements also identical reference numerals are used.

FIG. 2 shows a second embodiment of a sheet-metal strip 1 for forming a profile rail 2, which differs from the embodiment according to FIG. 1 in that linear stabilizers 14 are provided for stabilizing the web 3, which are X-shaped from two in the region of the central axis 15 intersecting indentations 14 and whose ends are arranged in the vicinity of the bending edges 8.

In accordance with the embodiment according to FIG. 1, sections 6 are arranged in the region of the bending edges 8, between which recesses 5 are formed, the recesses 5 having a width which corresponds to the width of a section 6. The sections 6 in the region of a bending edge 8 are arranged opposite the recesses 5 of the opposite bending edge 8, wherein the sections 6 of the lower bending edge 8 in FIG. 2 have a serrated edge 15 in the region of their free end. Instead of a serrated edge, grinding or sawing of this edge can also be provided. In addition, in turn, a V-shaped end may be provided.

Between adjacently arranged pairs of impressions 14, the web 3 has an opening 11 in the region of an impression 12.

FIG. 3 shows a further third embodiment of a sheet-metal strip 1 for forming a profiled rail 2 which, in accordance with the embodiment according to FIG. 1, has two corrugations 10 extending in the longitudinal axis direction in the region of the bending edges 8.

In contrast to the embodiments according to Figures 1 and 2, the sections 6 in their longitudinal direction extending beads 16, which in the following in Figure 3 at the upper bending edge 8 sections 6 of the Area of the web 3 extend to the free end of the portion 6, while the angeordne¬ at the opposite and in Figure 3 lower bending edge portions 6 6 beads 16 which are formed only in a portion of the sections 6. In addition, the last-mentioned sections 6 are beveled at their free ends, while the sections 8 arranged at the opposite bending edge 8 have an edge 17 which is aligned parallel to the bending edges 8. The sections 6 of the rail 2 according to the embodiment of Figure 3 are formed substantially the same length. However, it is also possible to form the sections 6 with the edge 17 running parallel to the bending edge 8 longer than the sections 6 arranged on the opposite bending edge 8, as shown in cross section in FIG. 5, by way of example.

A further embodiment of a sheet-metal strip 1 for forming a profile rail 2 is shown in FIG. 6, this embodiment substantially coinciding with the embodiment according to FIG. In contrast to the embodiment according to FIG. 1, the sections 6 are not aligned at right angles to a flange 18 of the web 3, but at an angle α of 45 ° relative to the edge 18. The portions 6 of opposite edges 18 are also aligned in opposite directions. Each section 6 has a bending edge 8, along which the section 6 can be kinked abge relative to the web 3, wherein the bending edge 8 allows a buckling of the section 6 relative to the web 3 of 90 °. In the area of the angle α, notches 19 are provided in the transition region from the edge 18 to the section 6, in which the bending edge 8 terminates, so that the bending of the section 6 relative to the web 3 is simplified.

FIG. 7 shows a further embodiment of a sheet metal strip 1 for forming a profile rail 2 with a web 3 and two short legs 4 shown in FIG. 8. The web 3 is formed in its transitional region to the legs 4 with beads 10 which extend out of the surface 13 of FIG Bridge 3 are lifted out. Tongues 20 are formed in the middle region of the web 3, which are separated from the web 3 by punching outlines 21 and are bendable about a bending line 22 relative to the web 3 in such a way that they are aligned parallel to the surface normal of the web 3 according to FIG. The tongues 20 have a V-shaped free end with a. Cutting edge 23 on. In the region of the central axis of each tongue 20 is an in

Longitudinal direction of the tongue 20 extending bead 24 is formed, which rich in Be¬ rich the cutting edge 23.

Instead of a bead 24 may also be provided an impression. As a further stabilizing element, the bead 24, as well as the beads 10 described above, can be replaced by attached welds.

Finally, in FIGS. 9 to 10, a further embodiment of a device according to the invention for fastening insulating elements on a roof substructure is shown. FIG. 9 shows a profiled rail 2 with a web 3, which has two beads 10 which run parallel to one another and in the direction of the longitudinal axis, in combination with a retaining clip 25, which is U-shaped in cross-section and engages over the profiled rail 2.

The retaining clip 25 accordingly has a web 26 and two legs 27 bent at right angles thereto, wherein the two legs 27 are aligned parallel to the legs 4 of the profiled rail 2. The distance between the two legs 27 of the retaining clip 25 is greater than the width of the web 3 of Profil¬ rail 2. In the region of one of the surface 13 of the rail 2 facing surface 28 of the web 26 of the retaining clip 25, the retaining clip 25 two spaced apart and arranged parallel protrusions 29, which engage in the beads 10 of the rail 2. Further, the retaining clip 25 has a bore 30 for receiving a screw, not shown, which is arranged between the projections 29 and coaxial with an opening 11 of the rail 2 is provided.

The retaining clip 25 is made of galvanized sheet steel, wherein the material thickness of the retaining clip 25 is greater than the thickness of the rail 2. The projections 29 of the retaining clip 25 are formed as beads.

An alternative embodiment of a retaining clip 25 is shown in Figures 11 to 13. The retaining clip shown in Figures 11 to 13 consists of a metal strip which is abgewin¬ kelt at its ends to form the legs 27, wherein the two legs 27 are slightly retracted inward, so that the retaining clip 25 has paragraphs 31 in its outer edge region ,

Claims

claims

1. A device for fastening insulating elements on a Dachund terkonstruktion, in particular profiled sheets, consisting of at least one substantially U-shaped in cross-section and thus ei¬ nen web and two substantially perpendicular to the web extending leg having rail, characterized in that the profiled rail (2) has deflectable tongues (20) in the area of its web (3), which tongues are partially separated from the profiled rail (2) by punched-out portions (21).

2. Apparatus according to claim 1, characterized in that the tongue (20) has at least one bead (24).

3. Device according to claim 1, characterized in that the tongue (20) has at least one impression.

4. The device according to claim 1, characterized in that the tongue (20) via a bending line (22) ver¬ with the rail (2) is connected and that the bending line (22) opposite the free end of the tongue (20) has a cutting edge (23).

5. Apparatus according to claim 4, characterized in that the tongue (20) in the region of the cutting edge (23) is V-shaped.

6. Device according to claims 4 and 5, characterized in that that the bead (24), starting from the cutting edge (23), extends in the direction of the bending line (22), the bead (24) preferably being aligned perpendicular to the bending line (22).

7. The device according to claim 1, characterized in that at least one leg (4) of the rail (2) in by Ausneh¬ rules (5) separated sections (6) is divided and that the web (3) at least one extending in the longitudinal direction and in particular over the entire length of the profiled rail (2) extending bead (10) and / or at least one impression ().

8. The device according to claim 7, characterized in that the bead (10) in the region of the transition of the web (3) in the Schen¬ angle (4) is arranged.

9. Apparatus according to claim 7, characterized in that the web (3) has two beads (10), each in the region of

Transition of the web (3) in a leg (4) are arranged.

10. The device according to claim 7, characterized in that the profiled rail (2) made of metal, in particular light metal, beispiels¬, aluminum or corrosion-protected steel, such as galvanized steel or stainless steel is formed.

11.Vorrichtung according to claim 7 or 10, characterized in that the profiled rail (2) has a material thickness of 0.6 to 3 mm, in particular 1 to 1.5 mm.

12. The device according to claim 7, characterized in that the indentations (14) are formed flat.

13. The device according to claim 7, characterized in that the indentations (14) are formed linear and in particular obliquely to the longitudinal axis of the rail (2) are aligned.

14. The device according to claim 7, characterized in that a plurality of indentations (14) at regular intervals over the

Length of the rail (2) are arranged.

15. The device according to claim 7, characterized in that the profiled rail (2) in the region of the web (3) has a plurality of openings (11) for receiving fastening elements, in particular screws auf¬.

16. The apparatus according to claim 15, characterized in that the openings (11) in the region of indentations (12, 14) are arranged.

17. The apparatus according to claim 16, characterized in that in the indentations (12, 14) pressure compensation plates are inserted, which have with the opening (11) coaxially extending bores.

18. The device according to claim 7, characterized in that the sections (6) has a width between 10 and 100 mm, in particular between 25 and 50 mm and a length between 3 and 50 mm aufwei¬ sen.

19. The device according to claim 7, characterized in that the sections (6) at their free ends (7) have a cutting edge and / or a particular V-shaped tip.

20. The device according to claim 7, characterized in that the sections (6) are bevelled at their free ends (7) and / or have a ground wave structure.

2 I.Vorrichtung according to claim 7, characterized in that the sections (6) on opposite legs (4) unterschied¬ Lich long and / or wide.

22. The device according to claim 7, characterized in that the sections (6) at an angle 45 ° <α <90 ° relative to the longitudinal axis of the web (3) are aligned.

23. The device according to claim 7, characterized in that the sections (6) with the web (3) an angle ß> 90 ° schlie¬ Shen.

24. The device according to claim 7, characterized in that the sections (6) each have at least one in the direction of Längsach¬ se extending bead (16) and / or imprint.

25. The device according to claim 24, characterized in that the beads (16) and / or indentations are formed into the transition region from section (6) to web (3).

26. The apparatus of claim 1 or 7, characterized by at least one retaining clip (25) which is formed in cross section in wesentli chen U-shaped and thus a web (26) and two right angles to the web (26) aligned legs (27), wherein the width of the web (26) between the legs (27) is greater than the width of the web (3) of the profiled rail (2) is formed.

27. The device according to claim 26, characterized in that the material thickness of the retaining clip (25) is greater than the material thickness of the profile rail (2) is formed.

28. The device according to claim 26, characterized in that the retaining clip (25) in the region of its web (26) has at least one Öff¬ opening (30), the receiving a fastener for connecting the retaining clip (25) with the rail (2 ) serves.

29. The device according to claim 26, characterized in that the retaining clip (25) in the region of its web (26) beads (29) auf¬ has, which is substantially parallel to an edge between the web (26) and a leg (27). the retaining clip (25) extend.

30. building roof, consisting of a roof substructure, in particular made of profiled sheets and a heat insulating layer of insulating material elements arranged thereon, preferably made of mineral fiber insulating material elements, as well as at least one device for fixing the Dämm¬ material elements with the roof substructure, which consists of at least one substantially in cross-section U-shaped and thus a web and two substantially perpendicular to the web extending leg rail and fasteners consists, with which the Profile rail are connected to the roof substructure, characterized in that the profiled rail (2) in the region of its web (3) bendable tongues (20), which are partially separated by punching (21) of the profile rail (2).

31, building roof according to claim 30, characterized in that the tongue (20) has at least one bead (24).

32. building roof according to claim 30, characterized in that the tongue (20) has at least one impression.

33. building roof according to claim 30, characterized in that the tongue (20) via a bending line (22) ver¬ with the rail (2) is connected and that the bending line (22) opposite the free end of the tongue (20) has a cutting edge (23).

34. building roof according to claim 33, characterized in that the tongue (20) in the region of the cutting edge (23) is V-shaped.

35. building roof according to claim 30 and 33, characterized in that the bead (24), starting from the cutting edge (23) in the direction extends to the bending line (22), wherein the bead (24) is preferably aligned rechtwink¬ lig to the bending line (22) aligned.

36. building roof according to claim 30, characterized in that at least one leg (4) of the rail (2) in by Ausneh¬ rules (5) separated sections (6) is divided and that the web (3) at least one extending in the longitudinal direction and in particular over the entire length of the profiled rail (2) extending bead (10) and / or at least one impression (14).

37. Building roof according to claim 36, characterized in that the bead (10) in the region of the transition of the web (3) in the Schen¬ angle (4) is arranged.

38. building roof according to claim 36, characterized in that the web (3) has two beads (10), each in the region of

Transition of the web (3) in a leg (4) are arranged.

39. Building roof according to claim 36, characterized in that the profiled rail (2) made of metal, in particular light metal, beispiels¬, aluminum or corrosion-resistant steel, for example, galvanized steel or stainless steel is formed.

40. building roof according to claim 36 or 39, characterized in that the profiled rail (2) has a material thickness of 0.6 to 3 mm, in particular 1 to 1.5 mm.

41. building roof according to claim 36, characterized in that the indentations (14) are formed flat.

42. building roof according to claim 36, characterized in that the indentations (14) are formed linear and in particular obliquely to the longitudinal axis of the rail (2) are aligned.

43. building roof according to claim 36, characterized in that a plurality of impressions (14) at regular intervals over the

Length of the rail (2) are arranged.

44. building roof according to claim 36, characterized in that the profiled rail (2) in the region of the web (3) has a plurality of openings (11) for receiving fastening elements, in particular screws auf¬.

45. building roof according to claim 44, characterized in that the openings (11) in the region of indentations (12, 14) are arranged.

46. building roof according to claim 45, characterized in that in the indentations (12, 14) pressure compensation plates are inserted, which have with the opening (11) coaxial bores.

47. building roof according to claim 36, characterized in that the sections (6) has a width between 10 and 100 mm, in particular between 25 and 50 mm and a length between 3 and 50 mm aufwei¬ sen.

48. building roof according to claim 36, characterized in that the sections (6) at their free ends (7) have a cutting edge and / or a particular V-shaped tip.

49. Building roof according to claim 36, characterized in that the sections (6) at their free ends (7) are chamfered and / or have a ground wave structure.

50. building roof according to claim 36, characterized in that the sections (6) on opposite legs (4) unterschied¬ Lich long and / or wide.

51. building roof according to claim 36, characterized in that the sections (6) at an angle 45 ° <α <90 ° relative to the longitudinal axis of the web (3) are aligned.

52. building roof according to claim 36, characterized in that the sections (6) with the web (3) an angle ß> 90 ° schlie¬ Shen.

53. building roof according to claim 36, characterized in that the sections (6) each have at least one extending in the direction of Längsach¬ se bead (16) and / or embossing.

54. Building roof according to claim 53, characterized in that the beads (16) and / or indentations are formed into the transition region from section (6) to web (3).

55. Building roof according to claim 36, characterized in that at least one retaining clip (25) overlaps the profiled rail (2) and is inserted into the thermal barrier coating, wherein the retaining clip (25) is formed in cross-section substantially U-shaped and thus a web

(26) and two at right angles to the web (26) aligned leg (27) auf¬ has and wherein the width of the web (26) between the legs (27) is greater than the width of the web (3) of the rail (2) ,

56. building roof according to claim 55, characterized in that the material thickness of the retaining clip (25) is greater than the material thickness of the rail (2) is formed.

57. building roof according to claim 55, characterized in that the retaining clip (25) in the region of its web (26) has at least one Öff¬ opening (30), the receiving a fastener for connecting the retaining clip (25) with the rail (2 ) serves.

58. building roof according to claim 55, characterized in that the retaining clip (25) in the region of its web (26) beads (29) auf¬ have, which is substantially parallel to an edge between the web (26) and a leg (27). the retaining clip (25) extend.