EP2562325B1 - Thermal insulation composite system - Google Patents

Description

The invention relates to a system Stelldubel with the features of the preamble of claim 1 for mounting insulation boards of a thermal insulation composite system and a thermal insulation composite system (ETICS).

It is well known from the prior art, building exterior walls by the application of thermal insulation composite systems against heat loss to dams. As a source for publications of various thermal insulation systems here, for example, the corresponding trade association (ETICS e.V.) Are called.

Such thermal insulation systems are usually constructed so that a final plaster or topcoat is applied to a single or multi-layer insulation layer system consisting of conventional thermal insulation materials. The applied on the thermal insulation plaster layer or cover layer has the task here, which also usually belongs to exterior plasters, namely to achieve a weather resistance and at the same time to create a visually appealing surface that can be designed for example by applying with a facade paint.

However, this results in practice in the problem that such a plaster or cover layer is applied to a stable and stress-free surface, otherwise cracks in the material can be created by subsequently introduced into the cover layer stresses. The usual plaster and outer layers are limited in this position able to absorb stresses from the substrate, without causing cracking. Sources of such stress formations can be, for example, curing or drying processes, which can lead to a movement in the carrier material. The same can also be due to temperature-dependent expansion processes as well as shrinkage processes occurring after cooling, which is why the plaster or cover layer has to participate in a certain amount of movement here.

Another problem may arise from the fact that the actual thermal barrier coating is not so strong and stable on the building exterior wall is fixed, that it can come within the thermal insulation layer to movements, which in turn can be felt as tensions in the plaster and thus lead to cracking. This problem is given in particular by the fact that in the prior art, the building outer walls are covered by a composition of thermal insulation boards, which then connected together form the actual thermal barrier coating. Although these plates are attached by mechanical and adhesive connection to the building exterior wall, but it can still come to movements of the plates to each other or to Schüsselung of the building wall.

This may be due to solar radiation and corresponding heat influences or other weather influences, for example. In the case of not completely exact processing of the thermal insulation panels, it can also lead to fissures, which then in turn affect cracking of the plaster. The thermal insulation panels themselves can also be subject to deformation, for example, when using the material polystyrene (EPS). Finally, the effect of the wind on the building facade is also to be considered, as by the action of the wind also movements in the insulation board coating can be transferred, in which case the height of the building are also an influencing factor for the influence of wind suction forces on the building facade.

It is already implemented to solve this problem in the prior art, to lay the butt edges of the abutting thermal insulation panels in a Stufenfalz principle or tongue and groove principle, so that there is a positive connection of the insulation boards in the joint area. This mold connection causes transverse lifting of the plates from each other is prevented and at the same time a gap formation is avoided, which could cause a thermal or cold bridge.

However, only by the Stufenfalzverlegung or the tongue and groove installation, the insulation board problem can not be solved finally. It is therefore used in practice usually a high number of fixing dowels, which always penetrate the plates completely and with appropriate screws in dowels anchored in the building exterior walls. Alternatively, these dowels may also be arranged in the folds of the insulation boards attached to one another.

However, it is here a higher number of dowels per m ² required to meet the relevant requirements for the secure attachment of the thermal insulation panels on the building facades, as is the case with conventional systems in which the dowels are driven through the entire insulation material to then to be connected to the underground. When using anchors placed in the rebate, the number of dowels per square meter must be calculated considerably higher in order to be able to positively fulfill the requirements for the approval of the fastener product (full-through dowel penetration values).

Furthermore, in the prior art special cleaning systems are known which attempt, for example, by multi-layer plaster systems or by special thick-layer plaster structure to avoid cracking in the plaster and so to be able to compensate for the movements in the thermal insulation systems in the plaster.

From the publication EP 1111289 A2 is a composite thermal insulation system is known, which is composed of a plurality of thermal insulation panels in a composite surface. The attachment takes place here by gluing and dowelling on an outer wall of a building. With respect to the dowelling is disclosed here that screws are used with dowel plates, which are connected to the insulation material, and a connection of these dowel plates is disclosed with insulation material connection strips.

In this known under the term of the rail system thermal insulation composite system, the anchor plate sitting on the insulation material connection strips, resulting in disadvantages of this construction. Although it is a good application of force and holding action ensured by the screws in conjunction with the anchor plates and insulation connector strips, but at the same time there are problems with the surface of the thus covered with insulation panels surface, as the surface of the thermal insulation system is provided by a variety of strips with seated anchor plates, which must be covered in a further processing, for example, an application of plaster, which can lead to bumps in the plaster or a disproportionately thick plaster application. Also, a crack in the plaster is likely by this arrangement.

Furthermore, it is disadvantageous here that the profiled dowels used here are not guided by the insulating material, but only by the retaining strip of the system. It must therefore be driven in addition by other commercial dowels through the insulation. So it will be used two different dowels, which already means a complication during processing. In addition, unevenness is compensated by washers, which sit behind the profile construction and represent another element to be installed.

In the DE 10 2007 058 773 A1 discloses a Systemstelldübel whose central function is to make an adjustment of the distance between an insulating plate and the wall to which this insulation board is attached. This is achieved by a dowel plate-like insulation holder, which hooked on barb-shaped anchor in the insulating material and thus can serve as an abutment for the screw guide, so that by a movement of the screw in the anchor in the anchorage a pre-accession and spacing of the insulating material can be achieved to this anchorage ,

In this way, although it is achieved that a good alignment of the thermal insulation boards in relation to the anchorage can be made, however, remains disadvantageous that through this system dowel neither secure connection of the individual insulation boards in the thermal insulation system with each other, nor a reduction in the number of required fixing dowels the surface of the thermal insulation system calculated can be achieved.

Against this background, it is the object of the present invention, a Systemstelldübel and one of a variety Thermal insulation composite composite composed of thermal insulation panels so that a secure connection of the individual plate elements with each other and the thermal insulation composite system on the building facade can be achieved with the least possible number of fixing dowels.

This is achieved according to the invention by a system dowel according to the invention with the features of the main claim and a thermal insulation composite system.

The subclaims have advantageous embodiments of the invention for the subject.

The basic idea here is to improve the fixing dowels which attach selectively in the state of the art by cooperating with a holding body extending over the insulating panel body over a large area such that a force effect can be achieved on a larger area of the insulating panel. This has the advantage that it can not come to the characteristic small-scale funnel-shaped Ausbrechungen from the insulating material in an annular arrangement around the dowel head, as burdened by the connection of the dowel head with the larger-scale holding body at a tensile force on the insulation board this not only in punctual areas is, but on the holding body a greater distribution of the forces acting on the insulating board forces is achieved.

In this way, it is possible to securely attach an insulation board to the facade with only a system dowel in combination with a larger-scale holding body. Here, between the facade and the insulation board, an adhesive layer is applied as known in the art, but with the difference that the system adhesive is introduced after the actual mechanical system attachment, behind the insulation.

The core of the thermal insulation composite system according to the invention here is a novel system dowel, on the one hand, the connection between the insulation boards and the substrate, ie the facade of a building causes. This is to allow the system dowel in this function to allow an exact vertical alignment of the insulation boards in the plane parallel to the facade in that the immersed in the insulation board anchor plate is fixed in such a way in the insulation board, that it serves as an abutment for the alignment of the insulation board by the Turning in and out of the actual screw can serve.

This is achieved by the system so that the system dowel comprises the components of the actual plastic dowel, which is firmly sunk into a corresponding hole in the subsurface of the building facade and serves as a guide for the anchor plate. In this dowel screw is now screwed, which must have a defined length with respect to the mounting location in the dam material, the thickness of the insulating material and the intermediate layer between insulating material and substrate or building facade, which depends on the building and the vertical deviations and possibly compensated by the Thickness of the adhesive layer used between insulating material and building façade.

In order now to guide the screw through the elastic insulating material and at the same time to ensure that this screw finds a secure grip on this insulating material, a dowel plate is located at the head of the screw. This is a larger than usual formed plate-shaped body, in the middle of a recessed recess (rotary chamber) is arranged to receive the screw.

Below this plate level, this anchor plate has an extension which is intended to achieve the purpose in different designs to anchor securely in the insulating material, so that the anchor plate is plan resting on the outwardly facing side of the insulating board comes to rest. Through the recessed recess in the anchor plate (rotating chamber), the adjusting screw can now be screwed through the pierced insulating material in the set wall dowel.

It is inventively provided that after insertion of the screw in the countersunk recess (rotating chamber) of the anchor plate and screwing the screw in the ground anchor arranged in the area of the screw head of the screw open end piece is inserted into the anchor plate, which simultaneously closes the rotary chamber and thus ensures that, should the set screw be removed from the ground unscrewed, the screw head presses against the closure end, and thus the entire insulation board is pushed away from the wall to be insulated. This closure end piece can in this case for example be screwed or clipped on and thus enter into a firm connection with the anchor plate, the opening of this closure end causes the tool holder, for example. A Phillips or Torx, in the head of the screw continues to be accessible to a tool.

Through this closure end an abutment is thus created on the anchor plate, so that by screwing the screw, in particular by unscrewing the screw from anchored in the ground anchor the orientation of the insulation board in the vertical can be made because the head of the screw now as in a Bearing is performed in the anchor plate and thus by screwing in and unscrewing the screw from the wall plug a move the dowel plate causes in a horizontal plane, which in turn has an angling of the actual insulation board in their vertical alignment result, creating a vertical or aligned alignment of the insulation board by a - or turning the adjusting screw can be determined exactly.

The anchor plate can also be produced so that the Aufkantungen or spirals after the setting process only behind the insulation open - ie between the substrate and insulation - so when turning back the screw the Systemstelldübel against the adhesive side of the insulation board to press, so in case of By unscrewing the set screw, the upstands or spirals pull the insulation away from the substrate.

This is achieved by factory berthing devices are arranged with barbs on Systemstelldübelkopf or dowel neck, which press when screwing the screw to the outside and simultaneously jammed in the insulation. This variant would be used when e.g. through the entire insulation of the fastener would have to be.

The Systemstelldübel can also be produced as a further Systemstelldübel variant so that on the back of the anchor plate one or more lamellar and circumferential or barb-like triangular retractable flexible Aufkantungen are arranged, which commercially available washers or Unterlegedisks for Dämmstoffbefestiger can accommodate by clipping, creating a stepless Adjustment of insulation materials to the ground in connection with the end piece is easily possible.

These system dowels described above are embedded in a special design of the insulating panels, which are connected to one another via a Stufenfalzverbindung at their butt edges and thereby give a positive connection in the flat plane and counteract cracking in particular

The arrangement of the holding body is expediently provided there where the arrangement of the system dowel is provided in the subject invention. The thermal insulation composite system according to the invention provides for an arrangement of the system dowel in the shiplap, wherein the dowel plate is sunk such that a plan concerns the next insulation board with its rotationally symmetric trained stepped rabbet is possible.

It is now a further advantage of the thermal insulation composite system according to the invention, that here the insulation boards do not record on their outwardly facing closed surface the system dowel and thus must be penetrated by the system screw to full thickness, which has very long screws result. Rather, the Systemstelldübel is arranged in the stepped fold of the insulating material in this system solution, which is clear from the later Zeichnungsbe descriptions . Thus, here is guaranteed that the later outer surface of the thermal insulation composite system no perforations or projections identifies by the system dowel and thus forms a completely flat plane, which brings significant advantages in the subsequent application of plaster cover layers. In addition, shorter screws can be used, which is a significant cost factor on the size of the surfaces to be fastened.

It is a further significant advantage of the present system that the anchor plate, which, as already stated, is firmly seated in the insulating material, not only selectively or on a small area with respect to the size of the anchor plate, an introduction of force into the insulating material, for example during a pulling movement due to winds can initiate the building facades, but that this anchor plate is brought into a force connection with an additional, larger-area holding body, for example, a connection bar, which is also arranged in the Stufenfalz connection between the butting edges of the insulation boards.

It is here an expedient solution of the invention that such a holding body is guided in the form of a connecting strip in a groove extending parallel to the edge in the insulating material. Here, this connection bar, for example, have a T-profile, whereby a T-leg is guided vertically in the lower edge of the Stoßfalz Dämoppmaterials in a groove and a second leg of the T-shaped profile facing up into the seated thereon edge of the above Insulating material engages. This means that a connection between the two abutting edges of the stepped rebates is achieved in this way already by the used rail-shaped T-profile, which ensures a flat outer surface.

Now, if this T-shaped connection bar additionally brought into connection with the anchor plate of Systemstelldübels, then the forces acting on the insulation board forces along the insulation material-Verbindungsleistenprofils be distributed over a large area of the insulation boards at a tensile load of the insulation board. In practice, this means that there will be significantly fewer breakouts at these junctures or that significantly higher forces in this Area can act before the material yields. Calculated causes this effect that the same tensile strength can be achieved by wind forces on the insulated facade with a significantly lower number of Systemstelldübeln when these Systemstelldübel are also associated with the insulating connection strips, which also run in or on the insulation material.

The connection between the anchor plate and, for example, the connecting strip can in principle be produced in different ways. An advantageous design provides in this case that on the anchor plate itself, an extension is arranged, which is brought into connection with the connection bar. It is in this case provided an expedient design, in which the anchor plate hook-shaped on this extension so behind the connection bar rests, that it comes with a pulling movement on the insulation boards to a force in this connection bar by the engagement of the extension behind the anchor plate. Thus, the tensile forces are transmitted not only small area in the area of the dowel plate but also on the surface transmitted through the connecting bar in the insulating material.

As an alternative to this profile but also the insulation material can be factory-made so that e.g. an additional tongue and groove construction consisting of insulating material together with the system dowel takes over the task of the described profile.

Embodiments of the invention will be described in more detail below with reference to drawings.

Figur 1

einen Schnitt durch ein Wärmedämmverbundsystem mit eingesetztem Systemstelldübel und Verbindungsleiste,

Figur 2

das Wärmedämmverbundsystem mit einer anderen Bauform des Systemstelldübels im Bezug auf dessen Dübelteller,

Figur 3

der Systemstelldübel umfassend den eigentlichen Dübelkörper, die Stellschraube sowie den erfindungsgemäßen Dübelteller sowie

Figur 4

eine schematische Darstellung des Wärmedämmverbundsystems zusammengesetzt aus einer Vielzahl von Wärmedämmplatten, wobei die Anordnung der Systemstelldübel und Dämmstoff-Verbindungsleisten dargestellt sind.

Show it

FIG. 1

a section through a thermal insulation composite system with inserted system dowel and connection bar,

FIG. 2

the thermal insulation composite system with a different design of the system dowel in relation to its anchor plate,

FIG. 3

the Systemstelldübel comprising the actual dowel body, the screw and the anchor plate according to the invention and

FIG. 4

a schematic representation of the composite thermal insulation system composed of a plurality of thermal insulation panels, wherein the arrangement of the system dowel and insulation connection strips are shown.

In FIG. 1 hatched on the left side of the image, the background or the facade wall 1 for receiving the anchor 2 can be seen. In the dowel 2 is screwed the adjusting screw 3, which is arranged cross-wise at its free end with the screw head 4 through the anchor plate 5. It concerns with FIG. 1 This is a schematic representation in which the actual fastening means 6, which anchor the anchor plate 5 in the insulating material 7, are not shown. Between the insulation board 7 and the facade wall 1, the bonding layer 13 is also shown.

These fastening means 6 are shown schematically in FIG FIG. 3 shown, since only the actual anchor system can be seen here. Links of the vertically extending dowel plate 5, the fastening means 6 can be seen, which are pressed in this case hook-shaped insulation material 7, so that these barbs prevent detachment of the dowel plate 5 from the insulating material 7.

Also in FIG. 3 is schematically indicated that the screw 3 passes through this fastener 6 passes into the dowel 2. The arrows 14 indicate the rotational movement of the adjusting screw 3. By a rotational movement of this screw 3, this is in the dowel 2 on or unscrewed from this. After screwing the screw 3 through the dowel plate 5 in the dowel 2 a Verschlussendstück 9 is clipped onto the anchor plate 5 and thus holds the screw head 4 in a rotating chamber 15 on the anchor plate 5 as a camp firm.

The closure end piece 9 is hereby usually designed as a plastic body and held firmly on the anchor plate 5 via a clamping mechanism. The screw head 4 can thus no longer move away from the dowel plate 5 in a horizontal plane, but always runs in the plane of the dowel plate 5, whereby upon rotation of the screw head 4, which is still possible through an opening in the closure end piece 9, the dowel plate 5 and thus also the insulating material 7, in which this anchor plate 5 is inserted, can be adjusted in a horizontal plane and thus can be guided to a vertical orientation.

It is in FIG. 1 recognizable that designed as a T-shaped strip 10 is inserted into the insulation board 7 so that it overlaps the extension 8 of the anchor plate 5 and on the other hand has an upwardly projecting vertical extension 11, which in a corresponding groove in this Insulating material engaging not shown next insulation board element engages and thus causes a positive connection between these two elements.

That is, the holding action of this connection bar 10 extends over the area of the abutting insulation boards 7 and causes a precise alignment of the butt edges to each other and thus avoiding gap formation. At the same time, the positive fastening effect of the connecting strip 10 in interaction with the anchor plate 5 acts in both contiguous insulation boards.

In addition, this interaction between dowel plate 5 and connecting strip 10 provides additional security in that the dowel plate 5, should it be made of the insulating material 7 due to e.g. Too large back pressure load break out in the setting process, remains on this important for the system and the setting position position remains.

It can be seen here that the right vertical hook-shaped projection 8 of the anchor plate 5, as can be seen in Figure 4, behind the downwardly pointing leg 12 of the T-shaped profile 10 is present. This results in the support function of the T-profile 10 in a pulling action, in the exemplary arrangement of a pulling direction to the right, on this connecting bar 10th

Drawing is not shown is a frontal view of the arranged in the insulating material 7 anchor plate 5. It is relevant that for inserting the anchor plate 5 is a pre-milling of the insulation board 7 at the desired location with a system cutter. This is necessary in order to be able to pass the dowel plate 5 through the fold. The corresponding system cutter is in this case adapted to the outer contour of the dowel plate 5, so that a corresponding flush mounting of the dowel plate 5 can be made in this milled recording. It is thus ensured that the dowel plate 5 can be fitted slightly recessed into the insulating material 7, so that a protrusion of the dowel plate 5 is not a hindrance to the next inset plate 7 to be inserted into the fold.

At the same time the system cutter causes a pre-drilling by the insulating material 7 takes place, in which the actual system dowel is introduced. It follows from this that the longitudinal groove in which the in FIG. 1 recognizable connection strip 10 is inserted, only in the area of the receptacle of the anchor plate 5 is milled away by the system router. The connecting strip 10 is thus guided and held securely in this groove in the areas left and right of the free-milled anchor plate receptacle.

The appended to the dowel plate 5 extension 8 also has an additional supporting function as a spacer, as he sits fitted in the rebate and causes the plugged connection bar 10 further stabilization of the anchor plate 5 in the insulation board 7.

In FIG. 2 is another design of the thermal insulation composite system shown, in which a simpler design of the anchor plate 5 is provided with a merely a right angle angled extension 8 as a spacer, which on a connection bar 10 is applied, which is designed as a simple bar and not as T-profile.

Finally shows FIG. 4 a distribution of the fastening means on an array of thermal insulation panels 7 as a thermal insulation composite system. It is shown here only schematically in the drawing, that the system dowel 3 are arranged in cooperation with the insulating connecting strips 10 in the region of the butt edges of the individual insulating panels 7. In this case, only one system dowel per insulation board is provided, which can only be achieved by providing the system according to the invention with a combination of the system dowel 3 with the dowel plate 5 and the insulation material connecting strips 10.

Claims (12)

1. System positioning anchor for fastening insulating panels (7) of a thermal insulation composite system, comprising a plastic anchor (2) or steel anchor, an adjusting screw (3) and an anchor plate (5) arranged on the adjusting screw, wherein the underside of the anchor plate (5) that is intended to bear against the insulating material (7) has arranged thereon one or more upstands (6) or other mechanical holding means which, when inserting the anchor plate (5), cut into the insulating material (7) and fix the anchor plate (5) on the insulating material (7),
   characterized in that
   a spacer (8) in the form of an extension projects from the upper side of the anchor plate (5) and is suitable for aligning the anchor plate (5) in the stepped rebate of the insulating material of an insulating panel (7) and for providing a support for fixing the anchor plate (5).
2. System positioning anchor according to Claim 1,
   characterized in that
   the spacer (8) projecting from the upper side of the anchor plate (5) is designed in the form of a hook- or U-shaped extension.
3. System positioning anchor according to Claim 1 or 2,
   characterized in that
   the anchor head or the anchor neck has arranged thereon clamping devices (6) with barbs which press outwardly when screwing in the adjusting screw (3) and thus clamp the system positioning anchor in the insulating material (7).
4. System positioning anchor according to Claim 1,
   characterized in that
   the rear side of the anchor plate (5) has arranged thereon one or more lowerable flexible upstands (6) which are designed to run around in a lamellalike manner or to have a barb-like triangular shape and which can receive washers by clipping on, with the result that a stepless adjustment of the insulating materials (7) with respect to the underlying structure in conjunction with the closure end piece is possible without a problem.
5. System positioning anchor according to one of Claims 1 to 4,
   characterized in that
   a closure end piece (9) is fixed in the plane of the anchor plate (5) after inserting the adjusting screw (3), wherein the closure end piece (9) has a through-opening for guiding through a tool to the adjusting screw head (4), thereby producing in the anchor plate (5) a bearing for the screw head (4) in the form of a screwing chamber between the anchor plate (5) and the closure end piece (9).
6. System positioning anchor according to one of Claims 1 to 5,
   characterized in that
   the connecting strip (10) is placed on the hook-shaped extension (8), which is arranged in the relief-milled portion, in such a way that the hook-shaped portion of the extension (8) engages behind the connecting strip (10).
7. Thermal insulating composite system comprising a plurality of thermal insulating panels (7) and system positioning anchors according to one of Claims 1-6, wherein the thermal insulating panels are intended to be assembled to form a sheet-like assembly and to be fastened to an outer wall (1) of a building by adhesive bonding and anchoring by means of the system positioning anchors, wherein, to fasten the insulating panels (7), the adjusting screws (3) are guided at the end into the anchor plates (5) which can be connected to the insulating material (7), wherein the thermal insulation composite system comprises insulating material connecting strips (10) and wherein the anchor plates (5) can be connected to the insulating material connecting strips (10),
   characterized in that

   - these insulating panels (7) have peripheral stepped rebates at their butting edges,

   - wherein the stepped rebates and the system positioning anchors are designed in such a way that the anchoring takes place in each case in the portion of the stepped rebate that is tapered in a graduated manner, with the result that the anchoring and the outwardly directed stepped rebate of this element are covered by the immediately following insulating panel element (7), and

   - wherein the insulating material connecting strips are intended to engage in corresponding receiving grooves in the stepped rebates of the insulating panels (7) in such a way that in each case a portion of the insulating material connecting strips (10) engages in the contiguous butting edges of the stepped rebates of the insulating panels (7), connecting the latter.
8. Thermal insulation composite system according to Claim 7,
   characterized in that
   the stepped rebate of the thermal insulating panels (7) has an additional sunken relief-milled portion in which the anchor plate (5) of the system positioning anchor is arranged by means of the spacer (8) inclined away from the anchor plate (5).
9. Thermal insulation composite system according to Claim 8,
   characterized in that

   - the spacer (8) on the anchor plate (5) is designed as a hook-shaped or U-hook-shaped extension,

   - wherein the anchor plate (5) is connected via this spacer (8) to the connecting strip (10) arranged in the stepped rebate of the insulating material (7).
10. Thermal insulation composite system according to one of the preceding Claims 7 to 9,
    characterized in that
    the anchor plate (5) of the system positioning anchor is arranged so as to be sunk in a milled-out portion in the rebate that has been produced beforehand in an accurately fitting manner with the anchor plate, in such a way that the latter can be sunk in a plane-flush manner in this milled-out portion and thus the next stepped rebate placed here can bear flat.
11. Thermal insulation composite system according to one of the preceding claims,
    characterized in that
    the insulating material connecting strips (10) which engage in corresponding receiving grooves in the stepped rebates of the insulating panels (7) are designed to be T-shaped.
12. Thermal insulation composite system according to Claim 7 or 8,
    characterized in that
    the system positioning anchor is guided directly through a flat connecting strip (10), and thus the anchor plate (5) is seated on the outer side on this flat strip.

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