EP3470589A1 - Method for fixing an insulating element and insulating dowel - Google Patents

Abstract

The invention relates to a method for fastening an insulating element (1) to an anchoring base (2) with an insulating dowel (3), which is characterized by the following step: Filling an adhesive (13) in the insulating element (1) in a region in which a shaft (24) of the insulating dowel (3) in the insulating element (1) is arranged after fastening, such that the shaft (24) after curing the adhesive (13) with the insulating element (1) is firmly connected.

Description

The invention relates to a method for fastening an insulating element with the features of the preamble of claim 1 and an insulating dowel with the features of the preamble of claim 10.

From the European patent application EP 2 905 392 A1 are a generic method and a generic insulation dowel for mounting an insulating element of a thermal insulation composite system known on an anchoring reason. The anchoring ground is typically an outer wall of a building made of a mineral building material, such as concrete. The insulating dowel is made of plastic and has at its front end on a spreading, which can be spread by driving a spreader and thus can be mechanically anchored in a wellbore in the anchoring ground. At its rear end, a retaining plate is formed as an insulating material holding element, which rests in the installed state on the insulating element to be fastened and holds the insulating element by positive engagement firmly on the anchoring ground on this insulation dowel. Between the spreading portion and the retaining plate, a tubular shaft is formed, the length of which corresponds to the thickness of the insulating element to be fastened. The lateral surface of the shaft is substantially smooth, so that the insulating dowel can be inserted without much resistance in relatively hard insulation materials. As a "soft insulating material" is hereinafter referred to an insulating material for thermal insulation systems made of stone or glass wool, generally from mineral wool, while referred to as a "hard insulation" example polystyrene plates, as used for example as Perimeterdämmung.

To attach an insulating element with the known insulation dowel first a hole is created in the anchoring reason, then introduced the insulation dowel into the hole and anchored by driving the expansion screw in the anchoring ground. The Dämmstoffteller is applied to the insulating material and holds the insulating element on the ground of anchoring. Through the retaining plate and spread spreading the insulating element is purely mechanically attached to the anchoring ground. The insulating anchor is intended to absorb a load of the insulating element from wind suction and to initiate an anchorage. A recording of shear forces through the insulation dowel is not scheduled. To absorb transverse forces, such as the weight of the insulating element, the insulating element is glued to the anchoring ground with its side facing the anchoring ground. If a soft insulating element of a thermal insulation composite system with a large thickness, in particular with a thickness greater than 160 mm and / or at doublings, fixed to a wall, it may happen that the insulating element deformed due to its own weight in itself and the the anchoring base side facing away from the insulating element drops, resulting in cracks in the thermal insulation composite system. By "doubling" is meant the arrangement of several layers of insulating panels one above the other, which together form an insulating element. For example, a "doubling" by gluing new, additional insulation panels on old, existing insulation panels of an existing thermal insulation composite system, which is to be renovated energetically.

The object of the invention is to propose a method for attaching an insulating element of a thermal insulation composite system to a wall and an associated insulation dowels, with which a permanently crack-free attachment is possible even with an insulating element of great thickness of soft insulation.

This object is achieved by a method having the features of claim 1 and an insulating anchor with the features of claim 10.

The method according to the invention serves for fastening an insulating element to an anchoring base with an insulating dowel. The insulating element is in particular an insulating panel of a thermal insulation composite system. The insulating element consists in particular of a soft insulating material, preferably of a mineral wool. The insulating element, or when using insulating elements in several layers, the insulating layer of the thermal insulation composite system, in particular has a thickness greater than 120 millimeters. The anchoring reason consists in particular of wood or a mineral building material, such as concrete. In particular, the Anchoring reason a wall to which the insulating element is glued surface or selectively with its back side facing the anchoring ground. The insulating dowel has a fastener for securing the insulation dowel in the anchoring ground. The fastener may be a nail or a screw, with the insulation dowel directly, for example by screwing a threaded portion acting as a fastener wood screw in wood, or indirectly, by driving the fastener into a arranged in a borehole in the anchoring base spreadable expansion of the insulation dowel, in Anchoring ground can be mechanically fastened. "Mechanically fastened" here means that the attachment is positive and / or frictional, but not, at least not exclusively, cohesively by gluing.

The insulating anchor also has a shaft which is tubular for receiving the fastener. "Tubular" here does not mean that the circumference of the shaft must be completely closed, but it can also be provided one or more openings on the shaft. The shaft extends in the direction of insertion, in which the insulating dowel is inserted into the insulating element for fastening, in the direction of a longitudinal axis of the insulating dowel and may have a constant diameter over its length. The diameter of the shaft can also change continuously or in sections. Unless otherwise stated below, "diameter" means the outer diameter of the cross section of the shaft or, in the case of a non-circular cross section, the outer diameter of a circle circumscribing the shaft in a radial plane to the longitudinal axis. The shaft can also be formed in one piece or in several parts, in particular made of plastic as an injection molded part. In particular, the shank is designed in such a way that it does not spread when the fastening element is introduced into the shank, ie does not change its diameter substantially. In the direction of insertion in front of the shaft, a spreading section can be arranged, which in particular is integral with the shaft and serves for securing the insulating anchor in the anchoring base. For this purpose, the expansion section is introduced into a drilled hole in the anchoring ground and spread by the fastener. The spreading is thus spread open by the fastener. Typically, the spreader portion has a slot for easy spreading, and the particular configuration of the spreader portion is not the subject of this invention. In the installed state, the shaft is arranged in the region of the insulating element, while the spread region is completely or at least over a large part of its length in the anchoring ground located. As an alternative to a spreading section, the shaft can end with an axial opening at the front end for the passage of a nail or a screw as a fastening element. On insulating dowel also an insulation holding element is arranged, with which the insulating element can be mechanically, in particular form-fitting, held. The insulating material holding element can be arranged on the shaft or on the fastening element. The insulation retaining element has a diameter which is greater than the diameter of the shaft and is designed in particular as a collar-like and radially to the longitudinal axis over the shaft protruding holding plate or as a helical Dämmstoffwendel for screwing into the insulating material to the insulating element a secure fit on or in the insulating element to give. For this purpose, the insulating material holding member has a diameter which is in particular several times the diameter of the shaft. In particular, the insulating element is at least ten millimeters, in particular at least 15 millimeters radially over the shaft over. In particular, the insulation retaining element has a diameter of at least 50 millimeters, in particular of at least 60 millimeters, while the diameter of the shaft is usually 8 to 20 millimeters. Relative to the fastening element, the diameter of the insulating holding element is at least six times larger, in particular at least eight times greater, than the diameter of the fastening element, whose diameter is usually between six and seven millimeters.

1. a) Einbringen des Dämmstoffdübels in das Dämmstoffelement, derart, dass der Schaft im Dämmstoffelement und das Dämmstoffhalteelement am oder im Dämmstoffelement angeordnet ist.

For fastening the insulating element to the anchoring base, the method according to the invention provides the following steps:

1. a) introducing the insulating dowel in the insulating element, such that the shaft is arranged in the insulating element and the insulating material holding element on or in the insulating element.

The shaft is introduced at least partially, in particular completely into the insulating element in this process step. The shaft of the insulating anchor is thus at least partially in the insulating element, i. the shaft is at least partially, in particular substantially completely surrounded by insulating material.

As a further method step, a borehole can be drilled into the anchoring ground in the insulating element or through the insulating element, so that a first borehole section and optionally in the anchoring base a second borehole section is formed in the insulating element, in which or the insulating anchors in step a) can be at least partially introduced. This process step is particularly advantageous or necessary for a mineral anchoring base or for an insulating element made of a solid and / or impermeable insulating material, so that the shaft can be inserted into the insulating material, or to introduce a possibly existing expansion section of the insulating anchor for anchoring in the anchoring ground.

• b) Befestigen des Dämmstoffdübels durch Eintreiben des Befestigungselements.

The process according to the invention comprises at least one further process step:

• b) securing the insulating anchor by driving the fastener.

In this case, the fastener can be driven directly into the anchoring ground or indirectly in a spreading of the insulation dowel. If at least these two method steps a) and b) are carried out, then the insulating dowel is mechanically anchored directly or indirectly to the fastening element in the anchoring base and the insulating element is mechanically connected to the insulating element. In this case, the insulating holding element may rest against the anchoring base facing away from the outside of the insulating element or be retracted or screwed into the insulating element, so that the insulating element holding flat against the insulating element and in particular presses the insulating element against the anchoring ground. If the insulating element retracted into the insulating element, which is usually referred to as "sunk set", it can, in particular if the insulation element is designed as Dämmstoffteller, as a further step, a Dämmstoffrondelle be used in the resulting when sinking behind the Dämmstoffteller insulation hole. The introduction and / or attachment of the insulating anchor can be done for example with a setting tool, as for example from the European patent application EP 2 905 392 A1 is known. From this document also already the sinking and the flush mounting of the insulating material holding element on the insulating element is known. Due to the mechanical anchoring of the insulating anchor in the anchoring base and the mechanical connection of the insulating anchor with the insulating element, the required by the building inspectorate and in the relevant standards and regulations specified conditions for the use of such insulation dowels in thermal insulation systems are met.

• c) Einfüllen eines Klebstoffs in das Dämmstoffelement in einen Bereich, in dem der Schaft des Dämmstoffdübels im Dämmstoffelement nach dem Befestigen angeordnet ist, derart, dass der Schaft nach dem Aushärten des Klebstoffs mit dem Dämmstoffelement fest verbunden ist.

In order to ensure a permanently crack-free attachment of an insulating element, the further, for the inventive method characterizing step is provided for fastening the insulating element to the anchoring ground:

• c) filling an adhesive in the insulating element in an area in which the shaft of the insulating dowel is arranged in the insulating element after fastening, such that the shaft is firmly connected after curing of the adhesive with the insulating element.

The filling of the adhesive can be done directly in the insulating element, for example by a tubular adhesive nozzle of a commercial adhesive gun, through which the adhesive is applied for example from a cartridge or a can, is inserted into the insulating element. For filling, the adhesive nozzle can be introduced, for example, to the base of anchoring and moved away from the anchoring base, towards the outside of the insulating element facing away from the anchoring base, such that in the insulating element between the anchoring base and the outside of the insulating element, a kind of elongated Klebstoffpfropfen idealized one Art cylinder, arises, which connects with the insulating material. If a borehole has been drilled into the insulating element or into the insulating element and the anchoring base before method step c), then the adhesive can be filled directly into the borehole, for example likewise with an adhesive nozzle. The adhesive used is in particular an expanding adhesive, in particular an expanding foam, in particular a polyurethane (PU) foam, in particular a commercially available PU quick-assembly foam, for example a fischer 1K premium gun foam. "Expanding" my here that the adhesive when, or after dispensing from its packaging, in particular from a foam can, and before complete curing increases its volume, as is known from commercial PU gun foams. In particular, the volume of the adhesive increases during deployment by a multiple. In particular, a fire protection foam is used. As "fire protection foam" here an adhesive is referred to, which is flame retardant and temporarily protects the insulation dowel in the event of fire from failure by burning or melting. On Fire protection foam in the sense of the invention is, for example, the fischer 1K Premium B1 gun foam PUP B1 750. (The concrete product examples refer to the fischer main catalog mounting systems 03/2017 of fischerwerke GmbH & Co. KG, 72178 Waldachtal.)

The fact that the shaft of the insulating anchor is "firmly connected" after curing of the adhesive with the insulating element means here that it comes to a material and / or positive connection of the shaft with the adhesive and also the adhesive and the insulating element locally fabric and are positively connected, so that in particular the part of the insulating element facing away from the anchoring base is secured against slipping, which means that this part can not be moved independently of the insulating dowel. The word "adhesive" does not hereby imply that the adhesive must necessarily establish a material connection with the insulating element and / or the shaft, even if this is advantageous, but only that the adhesive establishes a firm connection the shank of the insulating dowel is firmly joined to form a unit which prevents slippage of outer layers and / or deformation of the insulating material, thereby providing a shear-resistant connection between the shank of the insulating dowel and the insulating element, even if the insulating element holds the insulating element no longer should press against the ground, for example, by relaxation or by thermally induced deformation of the insulating element, not all the length of the shaft and its entire circumference connected to the insulating element, but in particular at least 25% de r outer surface of the shaft, in particular at least 50% of the lateral surface of the shaft and in particular at least 80% of the lateral surface of the shaft by the adhesive firmly connected to the insulating element. In particular, a central and / or rear region of the part of the shaft lying in the insulating material is firmly connected to the insulating material. If a first borehole section is present in the insulating element, then this first borehole section is in particular completely filled with adhesive. In addition, a second borehole section in the anchoring base and / or a hollow layer between the anchoring base and the insulating element can also be filled with the adhesive, so that in addition the bonding of the rear side of the insulating element facing the anchoring base to the anchoring base is improved.

For firm connection of the shaft with the adhesive roughness elements are arranged on the shaft of the insulating anchor according to the invention, which are distributed over substantially at least 50% of the length of the shaft and in particular made in one piece with the shaft, for example by injection molding. In particular, roughness elements are arranged distributed over at least 75% of the length of the shaft and in particular over the entire length of the shaft, so that the adhesive finds a firm grip on the shaft over as large a range as possible. The roughness elements are in particular distributed equally over the length and / or over the circumference of the shaft. The formation of roughness elements is particularly advantageous if the shaft is made of a material that does not connect to the adhesive or for a solid compound to a sufficient extent with the adhesive. The roughness elements can be formed, for example, by small local elevations, as are known, for example, as the grain of coarse sandpaper, by larger punctiform elevations or webs arranged on the shaft, this enumeration not being conclusive. In particular, the roughness elements are formed as webs or ribs which extend at an angle to the longitudinal axis. In particular, a plurality of V-shaped webs are arranged as roughness elements on the shaft, wherein the tip of each V-shaped web in the direction of insertion of the insulating dowel points into the insulating element. In particular, webs or ribs extend in a radial plane to the longitudinal axis. Alternatively or in combination, the roughness elements are formed as grooves which extend in the circumferential direction or at the periphery transversely to the longitudinal axis. The formation of grooves as roughness elements has the advantage that the grooves do not hinder the introduction of the insulating dowel in hard building materials, so that the insulating dowel can be used universally and independently of the material of the insulating element.

Preferably, step c) of the method according to the invention, ie the filling of the adhesive into the insulating element, takes place before steps a) and b). If a borehole has to be drilled in the insulating element or in the insulating element and the anchoring ground, the drilling of the borehole takes place before step c). This sequence of process steps allows economical working and the use of known adhesives and insulating dowels, such as fischer PU gun foam and insulation dowel fischer Termoz CS 8 with retaining plate, which need not or only slightly modified.

Furthermore, it is preferred that a rear portion of the shaft of the insulating anchor is greater than the diameter of a filling opening in the insulating element, is introduced by the adhesive in the insulating element, such that the rear portion acts as a plug and after step a) leakage of in step c) prevents introduced adhesive from the rear end of the borehole as soon as the plug is inserted into the filling opening. The filling opening is in particular the part of the borehole, in particular the borehole, into which the insulating dowel is plannedly introduced in step a), or the opening which is in contact with the nozzle when introducing a nozzle into the insulating element or through the insulating element Adhesive is formed in the insulating element in the insulating material. In particular, when using PU foam as an adhesive acting as a stopper rear section prevents the expanding PU foam from the filling opening on the outside of the insulating material element exits, which could lead to contamination and thus an increased effort to clean the outside the insulating element prior to further processing, such as the application of a fabric or a plaster. In addition, the plug prevents adhesive from escaping from the opening and thus is no longer available for gluing the shaft to the insulating element.

It is further preferred that step c) takes place after step a) and before step b). Alternatively, step c) takes place after the steps a) and b). In these cases too, if necessary, the creation of a borehole into which the insulating anchor is to be introduced, in particular before step a).

Preferably, in step c), the adhesive is introduced into the shaft of the insulating anchor. In this case, the adhesive is filled into a filling opening at the rear end of the insulation plug in the insertion direction. This filling opening is formed in particular by the rear end of the screw channel, which is provided for guiding the fastening element in the tubular shaft. On the shaft of the insulating anchor outlet openings are arranged for the adhesive, which penetrate a lateral surface of the shaft. These outlet openings are distributed in particular on the shaft over its length and / or its circumference. These outlet openings may themselves form groove-like roughness elements and / or be combined with (further) roughness elements on the shaft. Through the outlet openings, the adhesive passes between the shaft and the insulating element. In this case, the insulating material pushed away from the shaft by the particular expanding adhesive so that an annular gap-like space is created, which is filled by the adhesive. If, after the adhesive has been introduced, the fastening element is driven in step b), the fastening element can act in particular as a plug, which prevents the adhesive from escaping from the filling opening in such a way that the adhesive only passes through the outlet openings in the lateral surface of the shaft can emerge from the shaft, whereby a firm connection between shank and insulation material can arise.

Furthermore, it is preferred that at least one filling opening for the scheduled passage of adhesive is arranged on the insulating material holding element, can be introduced through the adhesive into the shaft, so that the adhesive in step c) can be filled through the insulating material holding element into the insulating element.

Preferably, at least one filling opening is connected to a filling channel for guiding adhesive. The filling channel is part of the shaft. Through the filling opening, the adhesive passes into the filling channel of the shaft, which is in particular separated on the outside of the shaft and in particular by a screw channel of the shaft. The formation of a separate from the screw filling channel has the advantage that the introduced into the shaft adhesive can not get into the screw and thus does not hinder the insertion of a fastener in the screw of the shaft.

Preferably, the insulating element essentially consists of mineral wool, which has a layer whose layer plane or, in the case of more than one layer plane, the layer planes of which extend preferably radially to the direction of insertion of the insulating dowel into the insulating element. In this case, the layer planes may be present within a one-piece insulating element by the production of the insulating element, and / or run as separating layers between two insulating elements, if the insulation of a thermal insulation composite system is multi-layered, in particular designed as a doubling. For example, a 240-millimeter thick insulation of a composite thermal insulation system of two layers of insulating elements, each with a thickness of 120 millimeters are formed. As a result of the radial arrangement of the layer planes, the adhesive can penetrate between the layer planes and into them, so that the adhesive forms planar, in particular disk-like, undercuts in the insulation element radially to the direction of insertion, which improve the bond between the insulation anchor and the insulation element. "Radial" in this context may not be strictly mathematical be understood, since the stratification within an insulating element in the production of the insulating element of mineral wool is formed and thus extends radially only within the manufacturing tolerances.

The invention will be explained in more detail with reference to five embodiments illustrated in the drawings.

Figuren 1a bis 1e

Darstellung der Verfahrensschritte eines ersten erfindungsgemäßen Verfahrens mit einem ersten erfindungsgemäßen Dämmstoffdübel in Schnittdarstellungen;

Figur 2

eine gemäß dem ersten erfindungsgemäßen Verfahren hergestellte Befestigungsanordnung mit einem zweiten erfindungsgemäßen Dämmstoffdübel in einer Schnittdarstellung;

Figuren 3a und 3b

Darstellung zweier Verfahrensschritte eines zweiten erfindungsgemäßen Verfahrens mit einem dritten erfindungsgemäßen Dämmstoffdübel in Schnittdarstellungen;

Figuren 4a und 4b

Darstellung zweier Verfahrensschritte eines dritten erfindungsgemäßen Verfahrens mit einem vierten erfindungsgemäßen Dämmstoffdübel in Schnittdarstellungen; und

Figuren 5a und 5b

Darstellung zweier Verfahrensschritte eines vierten erfindungsgemäßen Verfahrens mit einem fünften erfindungsgemäßen Dämmstoffdübel in Schnittdarstellungen.

Show it:

FIGS. 1a to 1e

Presentation of the method steps of a first method according to the invention with a first insulation plug according to the invention in sectional views;

FIG. 2

a fastening arrangement produced according to the first method according to the invention with a second insulation plug according to the invention in a sectional view;

FIGS. 3a and 3b

Representation of two process steps of a second method according to the invention with a third insulation plug according to the invention in sectional views;

FIGS. 4a and 4b

Representation of two process steps of a third method according to the invention with a fourth insulation plug according to the invention in sectional views; and

FIGS. 5a and 5b

Representation of two process steps of a fourth inventive method with a fifth insulation plug according to the invention in sectional views.

In the FIGS. 1a to 1e are successive process steps of a first method according to the invention for fastening an insulating element 1 to an anchoring base 2 with an insulating dowel 3 (FIG. Figures 1c to 1e ). The insulating element 1 consists of mineral wool, for example of rock wool, and has an outer side 4 and a back 5, which faces the anchoring base 2. The thickness of the insulating element 1 is 160 millimeters in the embodiment. Between the anchoring ground 2, here an outer wall of a concrete building, and the insulating element 1, an adhesive layer 6 is arranged, with which the back 5 of the insulating element 1 is adhesively bonded to the anchoring ground 2 point. The insulating element 1, due to the production, has a layering, the layer planes 7 of which run essentially parallel to the outside 4 or to the back 5.

As in FIG. 1a can be seen, a borehole 8 is first prepared in the anchoring ground 2 with a drill 9. For this purpose, the insulating element 1 is also pierced with the drill 9, so that in the insulating element 1, a first borehole section 10 and the anchoring base 2, a second borehole section 11 is formed. In the production of the borehole 8 and the adhesive layer 6 can be pierced. In the example shown, however, no adhesive layer 6 is present in the region of the bore 8, so that a hollow layer 12 exists between the insulating element 1 and the anchoring base 2.

After making the borehole 8, adhesive 13 is poured into the borehole 8 as shown in FIG FIG. 1b you can see. In the exemplary embodiment, the adhesive 13 is filled both into the first borehole section 10 and into the second borehole section 11, so that the borehole 8, but also the hollow layer 12, is substantially completely filled with the adhesive 13. For the invention it would already be sufficient if the adhesive 13 were filled only in parts of the first wellbore section 10. The adhesive 13 is an expanding polyurethane fire-resistant foam which foams after application and filling. To fill the adhesive 13, an adhesive nozzle 14 of a commercial can foam adhesive gun (not shown) is inserted into the wellbore 8 up to the front end 15 of the first wellbore portion 10 in the direction of insertion E, and slowly back out of the wellbore when the adhesive 13 is filled 8 out, pulled. As a result of the foaming of the adhesive 13, the mineral wool of the insulating element 1 is pressed radially away from the longitudinal axis L _{B of} the borehole 8, whereby areal and disk-like undercuts 16 arise in the region of the layer planes 7, which in the direction of the layering, ie in the direction of the layer planes 7 and thus extend radially to the direction of insertion E, in which the insulation dowel 3 is introduced into the insulating element 1 (see. Figure 1c ).

As in Figure 1c can be seen, after insertion of the adhesive 13, a dowel sleeve 17 of the insulation dowel 3 is introduced into the wellbore 8 until a Dämmstoffteller 18th formed insulation retaining element 19 of the insulating anchor 3 rests against the outside 4 of the insulating element 1. The insulating holding member 19 is disposed at a rear end of the dowel sleeve 17. At its front end, the dowel sleeve 17 has a slotted spreading portion 20, which can be spread by the introduction of a screw 21 as a fastening element 22 radially to the longitudinal axis L _{D of} the insulation dowel 3, whereby the expansion portion 20 against the wall of the first borehole section 10 in the anchoring ground. 2 pressed and the insulating dowel 3 thus mechanically anchored by frictional engagement in the anchoring ground 2, as shown in the FIGS. 1d ) and 1e ) you can see. So that the screw 21 of the insulating dowel 3 can be inserted into the dowel sleeve 17, the dowel sleeve 17 has a screw 23. In the insertion direction E behind the expansion portion 20, the dowel sleeve 3 has a smooth-walled, partially cylindrical, tubular shaft 24 which extends to the Dämmstoffteller 18 and in an adjacent to the expansion portion 20 front portion and in a central portion and thus on its essential Length has a constant diameter of 8 millimeters, which is thus significantly smaller than the diameter of the Dämmstofftellers 18, which is 60 millimeters. On the lateral surface of the smooth-walled shaft 24, a plurality of groove-like depressions 25 are formed, which form roughness elements 26 which are distributed substantially uniformly over more than half the length of the shaft 24.

The shaft 24 has a rear portion 33 which increases in diameter relative to the front and middle portion of the shaft 24 to 11 millimeters, and thus larger than the diameter of the bore 8 of 8 millimeters. If the dowel sleeve 17 is introduced into the drilled hole 8 after the adhesive 13 has been introduced, the rear section 33 acts as a plug, which acts as the rear end of the borehole 8 (see FIG. FIG. 1b ) closes and prevents the expanding adhesive 13 from exiting backwards against the direction of insertion E from the borehole 8 (cf. Figure 1c ) and thus is no longer available for bonding the insulating element 1 with the insulating dowel 3 available.

After the complete introduction of the insulating anchor 3 in the hole 8 of the shaft 24 is completely in the insulating element 1 and thus completely in the area in which adhesive 13 was filled in the insulating element 1 (see. FIGS. 1d and 1e ). The insulating material plate 18 abuts against the outside 4 of the insulating element 1. The Dämmstoffteller 18 engages behind the insulating element 1, with the Dämmstoffteller 18 is thus mechanically connected. After screwing the screw 21 through the screw 23 in the expansion section 20 of the insulating dowel 3 is mechanically anchored in the anchoring 2 and the Dämmstoffteller 18 pushes the insulating element 1 against the anchoring base 2, so that the insulating element 1 by the insulating dowel 3 mechanically anchoring ground. 2 is attached. In this in Figure 1d shown state, the expanding adhesive 13 fills existing cavities around the dowel sleeve 17, so that the cured adhesive 13 engages behind the form-locking elements acting as roughness elements 26 positively. In addition, the adhesive 13 connects to the shaft 24 cohesively, such that the shaft 24 is fixedly connected after curing of the adhesive 13 with the insulating element 1. The insulating dowel 3, the adhesive 13 and the insulating material of the insulating element 1 thus form a unit in the area of the borehole 8, which prevents the insulating element 1 from moving locally relative to the insulating dowel 3 or sinking, whereby a permanently crack-free fastening of the insulating element 1 is possible is.

In the following description of the FIGS. 2 to 5b In order to avoid repetition, only to the differences from those described above FIGS. 1a to 1e received. To standardize the same elements are provided with the same reference numerals.

In FIG. 2 a second fastening arrangement is shown in which a second inventive insulation dowels 103 according to the already for the FIGS. 1a to 1e anchored in the anchoring base 2 and connected to the insulating element 101 described process steps according to the invention. The insulating element 101 is in the in FIG. 2 The fastening arrangement shown not constructed single-layer, but consists of a first, inner insulating plate 128 and a second, outer insulating plate 129. Both insulation boards 128, 129 are made of polystyrene. They each have a thickness of 80 millimeters and are glued to each other by means of an adhesive layer 130. In this case, it is a so-called doubling, in which a new, additional insulation board, namely the outer insulation board 129 was attached to the existing inner insulation board 128 for energetic renovation of the stock, which significantly improves the insulating effect of the system. The insulating anchor 103 mechanically secures the two insulating panels 128, 129 on the anchoring base 2 and after hardening of the adhesive 13 additionally solid by material and positive connection with the two-layer insulating element 101 connected. The adhesive layer 130 forms, together with any existing old plaster, a kind of layer plane 107 into which the adhesive 13 can penetrate as an undercut 116. In contrast to the insulating dowel 3 from the first embodiment, no groove-like depressions 25 are provided on the shaft 124 of the insulating dowel 103, but V-shaped webs 131, which protrude as elevations of the smooth lateral surface, thus increasing the outer diameter of the shaft 124 and as positive locking elements for Form fit with the cured adhesive 13 act.

The FIGS. 3a and 3b show method steps of a further inventive method in which the introduction of the adhesive 13 only after the introduction of an insulating dowel 203 in the insulating element 1, which is again single-ply here and made of mineral wool, but before the driving of the fastener 22 takes place. For this purpose, the dowel sleeve 217 of the insulating dowel 203 groove-like recesses 225, which are made so deep that they reach into the screw 223. The groove-like recesses 225 thus form outlet openings 232 for the adhesive 13, which is filled in this case with the adhesive nozzle 14 in the screw 23 of the insulating dowel 203. By expanding the adhesive 13 and by driving the screw 21 exits the expanding adhesive 13 from the outlet openings 232 between the shaft 224 and the insulating element 1 in the region of the insulating element 1, in which the shaft 224 of the insulating dowel 203 after attachment with the Screw 21 is arranged. The outlet openings 232 form roughness elements 226 form-fitting elements for positive fixed connection with the cured adhesive thirteenth

Another insulating dowel 303, in which the adhesive 13 passes through the screw 323 and through outlet openings 332 between the insulating element 1 and the shaft 324 is in the FIGS. 4a and 4b shown. However, the filling of the adhesive 13 in the screw channel 323 takes place only after securing the insulating dowel 303 by driving the screw 321 into the expanding portion 320 of the insulating dowel 303. As an alternative to the spreading 320 and the screw 321, the attachment in the anchoring ground 2 directly with a nail or a screw, in concrete, for example, with a concrete screw. Due to the arrangement of the outlet openings 332 in a middle and rear part of the shaft 324 no adhesive 13 passes into the hollow layer 12, so that it is not filled with adhesive 13 in this case. The outlet openings 332 form as roughness elements 326 also form-locking elements for permanent solid positive connection with the cured adhesive thirteenth

Also in the in the FIGS. 5a and 5b illustrated method steps of a further inventive method with a further insulating dowel 403 according to the invention, the filling of the adhesive 13 after insertion into the wellbore 8 and attaching the insulation dowel 403 in the hole 8. Alternatively, it would also be possible with the insulating dowel 403, the adhesive according to step c ) before the process step b), attaching the insulation dowel 403 by driving the fastener 22 to fill. This is possible because the insulating dowel 403 on the shaft 424 two longitudinally, parallel to the longitudinal axis L _{D of} the insulating dowel 403, running Verfüllkänale 434, which are completely separated by a screw channel 423 surrounding wall 435 from the screw 423, such that no adhesive 13 can get into the screw 423. For the introduction of the adhesive 13, two filling openings 436 are arranged on the insulating element 419, which penetrate the insulating element 419 axially and through which the adhesive 13, which is introduced through the adhesive nozzle 14 into a filling opening 436, as planned into a Verfüllkanal 434, 436 with the filling is connected, enters and is guided through the filling channel 434 in the insertion direction E along the shaft to the outlets 432 arranged at the filling channel 434. As in FIG. 5a can be seen, the adhesive 13 when filling through the Verfüllkanal 434, based on the longitudinal axis L _{D of} the insulating dowel 403, introduced into the insulating element 1 on one side, so that to completely fill the adhesive nozzle 14 twice on Dämmstoffhalteelement 419, namely at each of the two Verfüllöffnungen 436, must be recognized. Also in this case, the outlet openings 432 act as roughness elements 426, with which the adhesive 13 connects firmly and positively after curing.

LIST OF REFERENCE NUMBERS Method for fixing an insulating element and insulating dowels

1, 101

insulating element

2

anchorage ground

3, 103, 203, 303, 403

insulation fixing

4

Outside of the insulating element 1, 101

5

Rear side of the insulating element 1, 101

6

adhesive layer

7, 107

layer plane

8th

well

9

drill

10

first borehole section in the insulating element 1, 101

11

second borehole section in the anchoring ground 2

12

hollowed

13

adhesive

14

glue nozzle

15

front end of the first wellbore section 10

16, 116

undercut

17, 117, 217, 317, 417

dowel sleeve

18, 318, 418

insulation plate

19, 319, 419

Insulation retaining element

20, 320

Spreading section of the insulating anchor 3, 103, 203, 303, 403

21, 321

screw

22, 322

fastener

23, 223, 323, 423

screw

24, 124, 224, 324, 424

shaft

25, 225

deepening

26, 126, 226, 326, 426

Rauheitselement

27

fill opening

128

inner insulation board

129

outer insulation board

130

adhesive layer

131

V-shaped bridge

232, 332, 432

Outlet opening of the shaft

33

rear portion of the shaft 24, 124, 224, 424

434

Verfüllkanal

435

wall

436

Verfüllöffnung

e

of introduction

L _B

Longitudinal axis of the borehole 8

L _D

Longitudinal axis of the insulating anchor 3, 103, 203, 303, 403

Claims (13)

Method for fastening an insulating element (1, 101) to an anchoring base (2) with an insulating dowel (3, 103, 203, 303, 403), wherein the insulating dowel (3, 103, 203, 303, 403) has a fastening element (22, 322) for fixing the insulating dowel (3, 103, 203, 303, 403) in the anchoring base (2), a shank (24, 124, 224, 324, 424) and an insulating holding member (19, 319, 419), wherein the Diameter of the insulating holding member (19, 319, 419) is greater than the diameter of the shaft (24, 124, 224, 324, 424),
the method comprising at least the following steps: a) introducing the insulating dowel (3, 103, 203, 303, 403) in the insulating element (1, 101), such that the shaft (24, 124, 224, 324, 424) in the insulating element (1, 101) and the Insulation holding element (19, 319, 419) is arranged on or in the insulating element (1, 101); and b) fastening the insulating dowel (3, 103, 203, 303, 403) by driving the fastening element (22, 322), such that the insulating dowel (3, 103, 203, 303, 403) is mechanically anchored in the anchoring base (2) and the insulating material holding element (19, 319, 419) is mechanically connected to the insulating element (1, 101),
characterized by the step: c) filling an adhesive (13) in the insulating element (1, 101) in a region in which the shaft (24, 124, 224, 324, 424) of the insulating dowel (3, 103, 203, 303, 403) in the insulating element (1, 101) is arranged after fastening, such that the shaft (24, 124, 224, 324, 424) after curing of the adhesive (13) with the insulating element (1, 101) is firmly connected. A method according to claim 1, characterized in that step c) takes place before the steps a) and b). A method according to claim 2, characterized in that a rear portion (33) of the shaft (24, 124) greater than the diameter of a Filling opening (27) in the insulating element (1, 101) is introduced through which the adhesive (13) in the insulating element (1, 101), such that the rear portion (33) acts as a plug and after step a) leakage of the adhesive (13) from the rear end of the borehole (8) prevented. A method according to claim 1, characterized in that step c) takes place after step a) and before step b). A method according to claim 1, characterized in that step c) takes place after the steps a) and b). A method according to claim 4 or 5, characterized in that in step c) the adhesive (13) in the shaft (224, 324, 424) is introduced and through outlet openings (232, 332, 432) of the shaft (224, 324, 424 ) passes between the insulating element (1) and the shaft (224, 324, 424). Method according to one of claims 4 to 6, characterized in that in step c) the adhesive (13) is filled through the insulating material holding member (419) into the insulating element (1). Method according to one of claims 1 to 7, characterized in that the insulating element (1) consists essentially of mineral wool, which has a layer whose layer planes (7) extend radially to the insertion direction (E), in which the insulating dowel (3, 203 , 303, 403) is introduced into the insulating element (1). Method according to one of claims 1 to 8, characterized by the following step: d) creating a borehole (8) in or through the insulating element (1, 101), in particular in the anchoring ground (2), such that in the insulating element (1, 101 ) a first borehole section (10) is formed. Insulating dowel for use in a method according to any one of the preceding claims,
with a fastening element (22, 322) for fastening the insulating dowel (3, 103, 203, 303, 403) in an anchoring base (2), with a shank (24, 124, 224, 324, 424) and an insulating retaining element (19, 319, 419), thereby characterized in that roughness elements (26, 126, 226, 326, 426) are arranged on the shaft (24, 124, 224, 324, 424), distributed over substantially at least fifty percent of its length, for firmly connecting the shaft (24, 124, 224, 324, 424) with an adhesive (13). Insulation dowel according to claim 10, characterized in that on the shaft (224, 324, 424) outlet openings (232, 332, 432) for the adhesive (13) are arranged, which penetrate a lateral surface of the shaft (224, 324, 424). Insulation dowel according to claim 10 or claim 11, characterized in that at least one filling opening (436) for the scheduled passage of the adhesive (13) is arranged on the insulating element (419). Insulating dowel according to one of claims 10 to 12, characterized in that the shaft (424) has a Verfüllkanal (434) for guiding the adhesive (13) to the outlet openings (432) to which the Verfüllöffnung (436) is connected.

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