COMPOSITE SEALING DOWEL

Description

[0001] The invention relates to a composite sealing anchor. A composite sealing anchor is understood to be a screw anchor that provides a sealing effect between a screw and a building structure in which the screw anchor is located, particularly with regard to moisture and liquids. The screw anchor penetrates a composite sealing provided in the building structure and forms a reliable and permanent seal against this composite sealing.

[0002] A dowel with a sealing effect is known from German patent application DE 198 45 696 A1. This previously known dowel has at least one sealing agent on or near the dowel head. This sealing agent has both an inner part that seals against a fastener inserted into the dowel and an outer part that seals against a surface near the outer edge of a bore receiving the dowel. The sealing agent can be made of a deformable material, such as rubber. Alternatively, the sealing agent can be a sealing cushion containing silicone, sealing gel, or sealing cement, which is enclosed by a fine skin or membrane.

[0003] According to the standards DIN 19 531, DIN 19 532, DIN 19 533, and DIN 19 534, buildings and components must be designed and constructed to prevent damage from water or moisture. Consequently, the building structure must be protected by appropriate waterproofing measures.

[0004] Composite waterproofing systems with a protective layer of ceramic covering and cladding materials, or natural or cast stone tiles, are often used for this purpose. These typically consist of a ceramic tile or slab, grout between the tiles or slabs, tile adhesive beneath the tile or slab, and a waterproofing layer. The waterproofing layer is typically positioned between the tile adhesive and a building structure (a wall or floor, for example, made of brick or concrete) and bonded to the structure. Powder, paste, liquid, or sheet-like waterproofing materials are used for waterproofing in their delivered state. Suitable liquid waterproofing materials are available in various forms, for example, under the names FlächenDicht flexibel (FDF), DichtSchlämme Flex (DSF), TurboDichtSchlämme (TDS), or PU-FlächenDicht (PU-FD), from Sopro Bauchemie GmbH, Wiesbaden, Germany.Suitable sheet-like waterproofing materials can be purchased in various designs, for example, under the name Abdichtungs- und EntkopplungsWeb AEB (registered trademark) or Abdichtungs- und Entkopplungsbahn plus (registered trademark), from Sopro Bauchemie GmbH, Wiesbaden, Germany. Such sheet-like waterproofing materials consist, for example, of tear-resistant polypropylene film with a special nonwoven polypropylene coating on both sides and a thickness of approximately 0.3 mm to 0.9 mm.

[0005] Subsequently introduced penetrations, such as drill holes, pose a particular problem in composite waterproofing systems, as these typically penetrate the composite waterproofing all the way to the building structure. Even with such subsequently introduced penetrations, the watertightness of the composite waterproofing system must be ensured.

[0006] There is therefore a need to provide means that enable the simple and reliable sealing of penetrations subsequently introduced into composite waterproofing systems. According to one embodiment, the means should reliably meet the watertightness required for a particular exposure class against water or moisture, even after penetration of the composite waterproofing system.

[0007] The above object is achieved by a composite sealing anchor having the features of the independent claims. Preferred developments can be found in the dependent claims.

[0008] According to all embodiments, a composite sealing anchor (screw anchor) with a hollow cylindrical base body is provided. The hollow cylindrical base body does not have to be a mathematically perfect hollow cylinder. Furthermore, the hollow cylinder can be closed on one side and rounded at the closed end. It is also permissible for a lateral surface of the hollow cylinder to have penetrations, recesses, or projections. The base body has an opening at a first end in the axial direction for receiving a screw. When the screw is screwed in, the composite sealing anchor expands. The frictional connection between the composite sealing anchor and the surrounding material secures the screw against withdrawal.Furthermore, the screw forms a counter thread in the inner part of the composite sealing anchor, plastically deforming the material from which the composite sealing anchor is made and additionally displacing it radially outwards, thus expanding the composite sealing anchor.

[0009] According to a first embodiment, the base body has a first section and a second section in the axial direction, the first section being arranged between the second section and the first end of the base body. On its radially outer surface and optionally on its radially inner surface, the base body has a sealant made of an elastic material in the first section. In contrast, in the second section, the base body is free of the (elastic) sealant on its radially outer surface. The (elastic) sealant is made of a material that is different from the material from which the base body is formed. The first and second sections are thus defined by the presence or absence of (elastic) sealant.According to the invention, the sealant completely surrounds the base body in the first section on its radially outer surface in the circumferential direction of the base body, thus forming a ring. When a screw is screwed into the composite sealing anchor, the (elastic) sealant is pressed radially outwards. Free spaces in a penetration into which the composite sealing anchor is inserted are filled by the (elastic) sealant, thereby sealing the penetration against the composite sealing anchor and the screw. This also creates a positive fit to prevent the composite sealing anchor from being pulled out. According to the invention, the base body has a projection extending in the radial and axial directions on its radially inner surface in the first section.By having a radially inwardly extending projection on the base body in the area of ​​the (elastic) sealant, it is ensured that a particularly large amount of material is displaced radially outwards in the area of ​​the (elastic) sealant when a screw is screwed in.

[0010] If the penetration passes through a composite seal, which as described above is formed from a protective layer of a ceramic tile or plate or a natural or concrete stone, joint mortar between the tiles or plates, tile adhesive located under the tile or plate and a seal, the (elastic) sealant present in the first section brings about a sealing effect according to the invention, which in the axial direction of the composite seal dowel encompasses the seal of the composite seal and sections on both sides of the seal and thus acts across layers.

[0011] According to one embodiment, the material forming the base body has, in the first section, on the radially outer surface of the base body, a recess extending in the axial and radial direction, into which the (elastic) sealant is fully or partially inserted. Since a recess is set back radially inward relative to the adjacent radially outer surface of the base body, it is possible to fix the position of the (elastic) sealant in the axial direction of the base body by fully or partially inserting the (elastic) sealant. Furthermore, this makes it possible to ensure that a radially outer surface of the (elastic) sealant is aligned with the radially outer surface of the base body (meaning that both surfaces are flush) or only slightly protrudes relative to it. slightly" be understood that the radially outer surface of the (elastic) sealant protrudes from the radially outer surface of the base body by less than the average wall thickness of the base body and in particular by less than half the average wall thickness of the base body. According to one embodiment, the radially outer surface of the (elastic) sealant protrudes from the radially outer surface of the base body by less than 1 mm and in particular by less than 0.5 mm. The term " used " should include both the subsequent insertion of a separate (elastic) sealant in the form of a ring and the injection-molding of the base body with the (elastic) sealant.

[0012] According to one embodiment, the average thickness of the outer wall of the base body is the radial distance between a smallest circle defined by a radially outer surface of the base body and a largest circle defined by a radially inner surface of the base body, the centers of both circles coinciding.

[0013] According to one embodiment, the recess extends in the axial direction over the entire first section of the base body, which means that the (elastic) sealant is inserted into the recess in the base body over its entire axial extent.

[0014] According to an alternative embodiment, the recess extends in the axial direction over between 20% and 90% or over between 40% and 85% or over between 60% and 80% of the first section of the base body, which means that the (elastic) sealant is only partially inserted into the recess in the base body with respect to its axial extent.

[0015] According to one embodiment, the recess extends completely around the base body in the circumferential direction; then, the (elastic) sealant used is annular when viewed on its own.

[0016] According to one embodiment, the depth of the recess in the first section in the radial direction is between 0.25 mm and 2.5 mm, or between 0.5 mm and 2.25 mm, or between 1.0 mm and 2.0 mm. A recess with such a depth ensures that sufficient (elastic) sealant can be arranged around the base body to achieve the intended sealing effect.

[0017] According to one embodiment, the projection extends in the axial direction over the entire first section of the base body and is subsequently arranged in the axial direction at the same position as the (elastic) sealant.

[0018] According to an alternative embodiment, the projection extends in the axial direction over between 25% and 95%, or over between 45% and 90%, or over between 65% and 85% of the first section of the base body. The projection can either have a smaller extension in the axial direction of the base body than the (elastic) sealant and lie entirely within the first section, or it can be offset in the axial direction relative to the first section. If the projection is offset in the axial direction relative to the first section, the projection can even be larger than the first section.

[0019] According to one embodiment, the projection extends circumferentially completely within the base body. According to an alternative embodiment, a plurality of separate projections are provided distributed circumferentially. The use of a plurality of projections distributed circumferentially avoids excessive wall thicknesses of the base body.

[0020] According to one embodiment, the height of the projection in the radial direction relative to the radially inner lateral surface of the base body is between 0.25 mm and 2.5 mm, or between 0.5 mm and 2.25 mm, or between 1.0 mm and 2.0 mm. According to one embodiment, the height of the projection in the radial direction is less than or equal to the thickness of the (elastic) sealant in the radial direction.

[0021] Optionally, the base body also has an (elastic) sealant on its radially inner surface in the first section. By also incorporating an (elastic) sealant into the interior of the base body, the sealing effect is improved compared to a screw screwed into the composite sealing anchor.

[0022] According to one embodiment, the (elastic) sealant arranged in the first section on the radially inner lateral surface extends in the axial direction over the entire first section of the base body.

[0023] According to one embodiment, the (elastic) sealant completely surrounds the base body on its radially inner surface in the circumferential direction of the base body and thus forms a ring.

[0024] According to one embodiment, the (elastic) sealant is an elastomer body that completely surrounds the base body on its radially outer surface and / or on its radially inner surface in the circumferential direction of the base body, thus forming a ring. According to one embodiment, the elastomer body is a type of rubber, perfluorocarbon rubber (FFKM or FFPM), polyethylene (PE), or polytetrafluoroethylene (PTFE).

[0025] According to a second embodiment not encompassed by the claims, which can also be combined with the above first embodiment, the hollow cylindrical base body of the composite sealing anchor with the opening for the screw has a pasty sealant inside it. Since the base body of composite sealing anchors 25 is typically not made of a pasty material, the sealant is thus formed from a material that differs from the material from which the base body is formed. Furthermore, an outer wall of the base body has several openings and / or weakenings. According to one embodiment, a "weakening" is understood to mean an area in which a thickness of the outer wall is reduced by at least 50%, in particular by at least 75%, and further in particular by at least 90%, compared to the average thickness of the outer wall at this point.When a screw is screwed into the opening of the composite sealing anchor, the paste-like sealant is forced radially from the interior of the base body through the openings / weakened areas in the outer wall of the base body to the outside of the base body. As a result, any empty spaces in a penetration into which the composite sealing anchor is inserted are filled by the paste-like sealant, sealing the penetration against the composite sealing anchor and the screw.

[0026] If the penetration penetrates a composite waterproofing layer, the pasty sealant pressed outward from the base body creates a sealing effect that encompasses the composite waterproofing layer and sections on both sides of the composite waterproofing layer in the axial direction of the composite waterproofing anchor, thus acting across all layers. At the same time, the pasty sealant remaining inside the base body creates a good seal against a screw screwed into the composite waterproofing anchor.

[0027] According to a non-claimed embodiment, the composite sealing anchor is free of pasty sealant outside the base body.

[0028] According to a non-claimed embodiment, the pasty sealant is provided in a first end in the axial direction of the hollow cylindrical base body with the opening for the screw.

[0029] According to a non-claimed embodiment, the hollow cylindrical base body is filled in the axial direction completely or at least 2 / 3 or at least half or at least one third with the pasty sealant.

[0030] According to a non-claimed embodiment, the openings and / or weakenings are spaced apart from one another in the circumferential direction.

[0031] According to an embodiment not claimed, the openings and / or weakenings are arranged evenly distributed in the circumferential direction around the base body. The openings are elongated holes whose longitudinal axes are oriented in the axial direction of the base body or enclose an angle of between 5° and 60° with the axial direction of the base body or enclose an angle of between 5° and 30° with the axial direction of the base body. Furthermore, the weakenings are elongated grooves whose longitudinal axes are oriented in the axial direction of the base body or enclose an angle of between 5° and 60° with the axial direction of the base body or enclose an angle of between 5° and 30° with the axial direction of the base body. The largely axial orientation of the openings / weakenings minimizes the reduction in the tensile force that the composite waterproofing anchor can absorb in the axial direction.

[0032] According to a non-claimed embodiment, the base body has a first partition wall, which is arranged between the pasty sealant and the first end of the base body and seals off the pasty sealant from the opening of the base body. In this way, drying out or hardening of the pasty sealant can be prevented. According to one embodiment, the first partition wall is formed integrally with the base body. According to an alternative embodiment, the first partition wall is pressed or glued or welded or inserted into the base body. It is emphasized that the partition wall can also have the shape of a plug and be designed such that it can be removed from the base body.

[0033] According to a non-claimed embodiment, the base body has a second partition wall, which is spaced axially from the first partition wall. The pasty sealant can then be arranged between the first partition wall and the second partition wall. In this case, the two partition walls serve to delimit the section in which the pasty sealant is present. According to one embodiment, the second partition wall is formed integrally with the base body. According to an alternative embodiment, the second partition wall is pressed, glued, welded, or inserted into the base body.

[0034] According to an unclaimed embodiment, a thickness of the (first and / or second) partition wall is reduced by at least 50%, by at least 75%, or by at least 90% compared to an average thickness of the outer wall of the base body. This ensures that the (first and / or second) partition wall can be easily penetrated by a screw. According to one embodiment, the thickness of the second partition wall is greater than or equal to the thickness of the first partition wall.

[0035] According to an unclaimed embodiment, the paste-like sealant is a butyl rubber sealant, a polysulfide sealant, a silicone sealant, a polyurethane sealant, an MS polymer sealant, or a resin. Such materials are safe to process, combine well with composite sealing systems, and exhibit good and durable sealing properties.

[0036] According to a non-claimed embodiment, the base body has a section in the axial direction in which the base body is free of sealant. This section adjoins the first end of the base body and extends from the first end by between 1 mm and 10 mm, or by between 2.5 mm and 8 mm, or by between 3 mm and 6 mm in the axial direction. This prevents the sealant from penetrating outside a penetration into which the composite sealing anchor is inserted.

[0037] According to one embodiment, the section of the base body in which the base body has sealant extends over between 10 mm and 15 mm in the axial direction.

[0038] According to one embodiment, the section of the base body in which the base body has sealant extends in the axial direction over between 20% and 70% of the total length of the base body or over between 30% and 60% of the total length of the base body or over between 40% and 50% of the total length of the base body.

[0039] In this way, the composite waterproofing anchor is well adapted for sealing penetrations introduced into composite waterproofing systems, since such an axial extension of the sealant can act across layers by arranging sealant in the axial direction of the composite waterproofing anchor in the area of ​​the waterproofing of the composite waterproofing and on both sides of the waterproofing.

[0040] According to one embodiment, the base body is made of plastic and in particular of polyamide or metal.

[0041] According to further embodiments not covered by the claims, which can be combined with the above embodiments, a composite sealing anchor has a hollow cylindrical base body with an opening arranged at a first end in the axial direction for receiving a screw. The base body has elastomer layers on its radially inner and radially outer outer surfaces, which are continuous both in the axial direction and in the circumferential direction of the composite sealing anchor. This can also be a single common elastomer layer; thus, the base body can be formed entirely from elastomer. According to one embodiment, an extension of the hollow cylindrical base body in the axial direction is at least 10 mm or at least 15 mm.

[0042] Due to its elastomer layers, the composite waterproofing anchor exhibits good sealing properties both against the inner wall of the penetration and against a screw inserted through the opening in the base body. If the penetration penetrates a composite waterproofing system, which, as described above, can be formed from a ceramic tile or panel, grout between the tiles or panels, tile adhesive beneath the tile or panel, and a waterproofing layer, the elastomer layer on the radially outer surface creates a sealing effect that encompasses the waterproofing of the composite waterproofing system and sections on both sides of the waterproofing layer in the axial direction of the composite waterproofing anchor, thus acting across all layers.

[0043] According to an unclaimed embodiment, the base body has a layer of polyamide or metal between its radially inner and radially outer elastomer layers. Such a core significantly increases the stability of the composite sealing anchor and thus facilitates insertion of the composite sealing anchor along its axial direction into a penetration. Furthermore, such a core prevents a screw from accidentally penetrating the elastomer layers completely in the radial direction.

[0044] According to a non-claimed embodiment, the thickness of each elastomer layer in the radial direction is between 1 mm and 3 mm or between 1.5 mm and 2 mm.

[0045] According to an embodiment not claimed, the thickness of the layer of polyamide or metal in the radial direction is between 0.25 mm and 1.5 mm or between 0.4 mm and 0.8 mm.

[0046] According to one embodiment, the base body has, in a section that is optionally free of sealant, at least one pair of axially extending slots that penetrate a lateral surface of the base body. These slots facilitate expansion of the composite sealing anchor in the section.

[0047] According to one embodiment, the base body, in a section that is optionally free of sealant, has circumferentially oriented grooves on its radially outer surface, which alternate in the axial direction with circumferentially oriented projections. Such a surface can interlock well with the inner wall of a penetration into which the composite sealing anchor is inserted.

[0048] According to one embodiment, the base body has a radially outwardly directed flange at its first end adjacent to the opening. Such a flange prevents the composite sealing anchor from being inserted too deeply into a penetration. Furthermore, such a flange visually closes off the penetration.

[0049] According to a non-claimed embodiment, the base body is closed at its second end, axially opposite the first end. This second end can also be rounded to facilitate insertion of the composite sealing anchor into a penetration.

[0050] Embodiments of a method for sealing a penetration by a composite sealing system comprise the steps of providing a composite sealing anchor as described above, inserting the composite sealing anchor into the penetration, providing a screw, and screwing the screw into the base body of the composite sealing anchor. An outer diameter of the base body of the composite sealing anchor is adapted to an inner diameter of the penetration, and an outer diameter of the screw is adapted to an inner diameter of the base body of the composite sealing anchor.

[0051] The composite waterproofing anchor described above is particularly well-suited for use in sealing a penetration through a composite waterproofing system, since the sealant is arranged in the axial direction of the composite waterproofing anchor in the area of ​​the composite waterproofing seal and on both sides of the seal, allowing such a composite waterproofing anchor to act across multiple layers. Embodiments of a system for sealing a penetration through a composite waterproofing system comprise a composite waterproofing anchor inserted into the penetration and a screw screwed into the composite waterproofing anchor. The composite waterproofing anchor and the screw are jointly designed to ensure the required tightness for a particular stress class of the composite waterproofing system, even in the area of ​​the penetration.The composite sealing anchor is the composite sealing anchor described above and covered by the claims.

[0052] Embodiments of the invention are explained in more detail below with reference to the figures. Herein: Figures 1A and 1C show sectional views through a composite sealing anchor according to a first embodiment in different operating states; Figure 1B shows a cross-sectional view along the section line AA through the structure of Figure 1A ; Figures 2A and 2B show sectional views and cross-sectional views through a composite sealing anchor according to a second embodiment not covered by the claims in different operating states; and Figures 3A and 3B show sectional views and cross-sectional views through a composite sealing anchor according to a third embodiment not covered by the claims in different operating states.

[0053] In the figures, identical or similar elements are designated by the same or similar reference numerals.

[0054] Figures 1A to 1C show a first embodiment of a composite sealing anchor 1, which is suitable for sealing a penetration 35, such as a borehole, by a composite sealing system 30. The Figure 1A a sectional view along the longitudinal axis of the composite waterproofing anchor before screwing in a screw 20 and Figure 1C the same sectional view after screwing in screw 20. Figure 1B shows a cross-sectional view through the view from Figure 1A along section line AA.

[0055] The composite waterproofing system 30 shown in this embodiment comprises a 0.5 mm thick waterproofing membrane 32 applied to a building structure in the form of a wall 31. The waterproofing membrane 32 supports tiles 34 with a thickness of 10 mm by means of a 3 mm thick layer of tile adhesive 33. The penetration 34, which in the embodiment shown has an inner diameter 34D of 10 mm, completely penetrates the waterproofing membrane 32, the tile adhesive 33, and the tiles 34 and penetrates the wall 31.

[0056] The composite sealing anchor 1 is essentially formed by a hollow cylindrical base body 10 made of polyamide.

[0057] At its first end 11, the base body 10 has an opening 13 for the screw 20.

[0058] In the axial direction of the base body 10, a section A3 adjoins the first end 11, in which the base body 10 has a radially outwardly directed flange. In the embodiment shown, this section A3 extends by 1 mm in the axial direction.

[0059] This flange-forming section A3 is followed by a (first) section A1, in which the base body 10 has an elastic sealant in the form of an annular elastomer body 19 made of rubber on its radially outer surface 14. This annular elastomer body 19 extends 12 mm in the axial direction of the base body and thus has a greater longitudinal extent than the thickness of the composite seal 30. The annular elastomer body 19 is inserted 90% in the axial direction into a recess 16, which is formed on the radially outer surface 14 of the base body 10 and extends completely around the base body 10 in the circumferential direction. In the embodiment shown, a depth 16H of the recess relative to the adjacent surface 14 of the base body 10 is approximately 1 mm. In this way, the recess 16 fixes the position of the elastomer body 19 relative to the base body 10.As can be seen, in the embodiment shown, the end of the recess 16 facing the first end 11 of the base body 10 is delimited by the flange.

[0060] Adjoining the (first) section A1 defined by the annular elastomer body 19 in the axial direction of the base body 10 is a (second) section A2 which is free of the elastomer body 19 and at whose first end 11 in the axial direction of the opposite second end 12 the base body 10 is closed and has a tip. The tip facilitates insertion of the base body 10 into the penetration 35. In order to promote spreading of the base body 10 when the screw 20 is inserted, the outer surface of the base body 10 is penetrated by a pair of axially oriented slots; these are in the Figures 1A and 1Cin the area of ​​the tip of the base body 10. In order to further improve engagement with the wall 31 when the screw 20 is inserted, the base body 10 has, in this section A2, circumferentially oriented grooves on its radially outer surface, which alternate in the axial direction with circumferentially oriented projections.

[0061] In this first embodiment, the base body 10 has, in the (first) section A1 defined by the annular elastomer body 19, projections 17 on its radially inner lateral surface 15, which projections extend in the radial direction relative to the adjacent lateral surface 15 by a height 17H of 1 mm and in the axial direction over the entire length of the annular elastomer body 19.

[0062] Out of Figure 1BIt is clearly visible that eight projections 17 are evenly distributed in the circumferential direction of the base body 10 and are formed integrally with the base body 10. It is emphasized that in the Figure 1B For the sake of clarity, only the opening 13 of the base body 10 for the screw 20 is shown in the cross-sectional view shown, and not the inner wall of the tip of the base body 10, which is spaced apart from the section line AA in the axial direction.

[0063] As can be seen from a summary of the Figures 1A and 1C The projections 17 promote the radial displacement of the annular elastomer body 19 outward from the base body 10 when the screw 20 is screwed into the composite sealing dowel 1, thus creating a press seal for the penetration 35 and in particular for the composite sealing 30. The annular elastomer body 19 penetrates into gaps and cracks in the penetration 35, which in Figure 1Csymbolically illustrated by the area marked with the reference numeral 19*. Since the annular elastomer body 19 is arranged not only in the area of ​​the sealing sheet 32 ​​of the composite seal 30, but in the axial direction of the penetration 35 on both sides of the sealing sheet 32, the composite seal anchor 1 acts across layers. For this purpose, an outer diameter 1D of the composite seal anchor 1 must be adapted to an inner diameter 35D of the penetration 35 and an outer diameter 20D of the screw 20 must be adapted to an inner diameter of the composite seal anchor 1. In addition to the annular elastomer body 19 provided on the radially outer surface 14 of the base body 10, an annular elastomer body can also be provided on the radially inner surface of the base body 10, which provides the seal against the screw. However, this is not specifically shown in the figures.

[0064] In the following, with reference to Figures 2A and 2B A second embodiment of a composite sealing anchor 1', which is not covered by the claims and is suitable for sealing a penetration 35 through a composite sealing system 30, is explained. In particular, differences from the first embodiment described above are discussed, and otherwise reference is made to the explanations regarding the first embodiment. Figure 2A shows on the right a sectional view along the longitudinal axis of the composite waterproofing anchor 1' before screwing in a screw 20 and on the left a cross-sectional view along the section line AA through the right figure. Figure 2B shows the same views after screwing in screw 20.

[0065] In the second embodiment, unlike in the first embodiment, the sealing layer 32 of the composite waterproofing system 30 is not formed by a waterproofing membrane but by a 2 mm thick layer of a formerly liquid waterproofing material applied to a drywall 31. The tile adhesive 33 and the tiles 34 of the composite waterproofing system 30, however, correspond to the first embodiment.

[0066] The composite sealing dowel 1' according to the second embodiment also has a hollow cylindrical base body 10' made of polyamide and an opening 13 for receiving a screw 20 at a first end 11 in the axial direction.

[0067] In the Figures 2A and 2BThe base body 10' is not shown over its entire length; in particular, an end opposite the first end 11 is not shown. However, the base body 10' can have a shape that corresponds to the shape of the base body 10 according to the first embodiment in section A2 (which is free of sealant). In particular, the base body 10' can be closed at its second end, which is axially opposite the first end 11.

[0068] In contrast to the first embodiment, the base body 10' has a pasty sealant 19' made of MS polymer inside it. On its radially outer surface, the base body 10' is free of the pasty sealant 19'. The presence of this sealant 19' also defines a (first) section A1 of the base body 10' in the axial direction in this embodiment. An outer wall of the base body 10' has twelve elongated holes 18 in this section A1, which are evenly distributed from one another in the circumferential direction of the base body 10'. The longitudinal axes of the elongated holes 18 are oriented in the axial direction of the base body 10'. The length 18L of the elongated holes 18 is 13 mm each in the embodiment shown, thus exceeding the thickness of conventional composite sealing systems 30.

[0069] In the embodiment shown, the (first) section A1, in which the pasty sealant 19' is arranged, is delimited by first and second partition walls 41, 42. The first partition wall 41 seals off the pasty sealant 19' from the opening 13 of the base body 10', and the second partition wall 42 seals off the pasty sealant 19' from a (second) section A2 of the base body 10' that is free of sealant. By using the partition walls 41, 42, the amount of pasty sealant 19' required can be kept low. Furthermore, undesired leakage or drying out of the pasty sealant 19' can be prevented. In the embodiment shown, the second partition wall 42 was welded to an inner wall of the base body 10' before filling with pasty sealant 19' and the first partition wall 41 after filling with pasty sealant 19'. As can be seen from Figure 2AAs can be seen, the partition walls 41 and 42 have wall thicknesses 41T and 42T, which correspond to only 15% of an average wall thickness 10'T of the base body 10'. An average wall thickness 10'T (corresponding here to the average thickness of the outer wall) of the base body 10' is understood to be the radial distance between a smallest circle defined by a radially outer surface 14 of the base body 10' and a largest circle defined by a radially inner surface of the base body 10', with the centers of both circles coinciding. As a result, the partition walls 41 and 42 can be easily penetrated by the screw 20.

[0070] A further difference between the first and second embodiments is that the section A3, which is free of sealant and adjacent to the first end 11 of the base body 10' with the opening 13, has a significantly greater longitudinal extension of approximately 4 mm and no flange in the second embodiment. The greater length of this section A3 prevents pasty sealant 19' from being forced out of the penetration 35.

[0071] When inserting the screw 20 into the opening 13 of the base body 10', the screw first presses an outer wall of the base body 10' in section A3 outwards, thus ensuring a certain pressure seal to an inner wall of the penetration 35. Subsequently, the screw 20 destroys the first partition 41 and presses the pasty sealant 19' through the elongated holes 18 to the outside of the base body 10', since the pasty sealant 19' is prevented from escaping in the axial direction by the second partition 42. A resulting filling zone for the pasty sealant 19' is shown in Figure 2Bshown schematically. In the second embodiment, the filling zone also extends not only in the area of ​​the sealing layer 32 of the composite sealing system 30, but also in the axial direction of the penetration 35 to both sides of the sealing layer 32. Thus, the composite sealing anchor 1 also acts across layers here. Subsequently, the screw 20 also destroys the second partition wall 42 and penetrates into the sealant-free section A2 of the base body 10'. The latter section A2 serves in particular for the mechanical fastening of the composite sealing anchor 1' in the penetration 35.

[0072] Also in the second embodiment, an outer diameter 20D of the screw 20 is to be adapted to an inner diameter of the base body 10' of the composite sealing anchor 1' and an outer diameter 1'D of the composite sealing anchor 1' is to be adapted to an inner diameter 35D of the penetration 35 and thus to be selected appropriately.

[0073] Even though elongated holes were provided in the second embodiment described above to allow the pasty sealant to emerge radially from the base body of the composite sealing anchor, those skilled in the art will recognize that the invention is not limited to the use of elongated holes. Rather, it is possible to provide weakened sections instead of the elongated holes, in which the thickness of the outer wall is reduced by at least 50% compared to an average thickness of the outer wall. As a result, these weakened sections tear open when the screw is screwed in due to the pressure exerted on the pasty sealant, releasing the sealant radially outwards from the base body. Those skilled in the art will recognize that, for proper functioning, the resistance offered to the pasty sealant in the axial direction must be greater than the resistance offered to the pasty sealant by the weakened sections.As a result, the second partition wall would have to be made much thicker than in . Figures 2A and 2B shown and described above.

[0074] In the following, with reference to Figures 3A and 3B a third embodiment of a composite sealing anchor 1" which is not covered by the claims and is suitable for sealing a penetration 35 through a composite sealing system 30 is explained. In this case, particular attention is paid to differences from the first embodiment described above, and otherwise reference is made to the explanations regarding the first embodiment. Figure 3A shows a sectional view along the longitudinal axis of the composite waterproofing anchor 1" before screwing in a screw 20 and Figure 3B The same view appears after screwing in screw 20.

[0075] The composite waterproofing system 30 corresponds to the composite waterproofing system of the first embodiment and has a waterproofing membrane 32 applied to a wall 31, which supports tiles 34 by means of tile adhesive 33.

[0076] In contrast to the first embodiment, the hollow cylindrical base body 10" of the composite sealing dowel 1" is formed on its radially inner and outer surfaces from elastomer layers 101, 103 made of rubber. Thus, the composite sealing dowel 1" has elastomer both along its entire axial extent and in the circumferential direction on its outer surfaces. In the embodiment shown, a core made of a polyamide layer 102 with a wall thickness of 0.5 mm measured in the radial direction is provided between the elastomer layers 101, 103. This core provides the composite sealing dowel 1" with axial stability and prevents a screw from completely destroying the elastomer layers 101, 103. The thickness of the elastomer layers 101, 103 on the outer surfaces of the composite sealing anchor 1" is 1.5 mm each, measured from the polyamide layer 102 in the radial direction, both to the penetration 35 and to the screw 20.

[0077] When screwing in the screw 20, the elastomer is pressed across all layers of the composite sealing system 30 against the inner wall of the penetration 35 as well as the outer wall of the screw 20, thus completely sealing the penetration 35 against water penetration.

[0078] In the third embodiment, the composite sealing dowel 1" unlike in the first embodiment does not have a flange surrounding its opening 13 for the screw 20. However, such a flange can be provided optionally. Furthermore, the composite sealing dowel 1" unlike in Figure 1 As shown, it does not have a point, but is hollow-cylindrical in shape. However, a point may be provided to facilitate insertion of the 1" composite waterproofing anchor into the penetration 35.

[0079] Even though the first, second and third embodiments have been explained separately above, it is obvious to a person skilled in the art that all of the embodiments can also be combined with one another. In such a case, the composite sealing dowel of the first or third embodiment additionally has pasty sealing material in its interior and corresponding openings / weakened sections in the outer surface, which allow the pasty sealing material to escape radially when a screw is screwed in. Partition walls can also be provided which delimit the pasty sealing material. Alternatively, the composite sealing dowel of the second embodiment can have, on its radially outer and / or radially inner outer surface, adjacent to the opening for the screw, an elastic sealant, in particular an annular one, which creates a press seal with the inner wall of the penetration or opening when a screw is screwed in.to the screw and thus prevents pasty sealant squeezed out of the composite sealing anchor from escaping from the penetration.

[0080] In summary, the present document discloses a composite sealing anchor for sealing a penetration through a composite sealing system, comprising a hollow cylindrical base body. The base body has an opening for receiving a screw at a first end in the axial direction. Furthermore, the base body has, at least in one section, an elastic or plastic sealant. The sealant 19, 19' is formed from a material that differs from the material from which the base body is formed and is pressed radially outward from the base body when the screw is screwed into the composite sealing anchor. According to an alternative embodiment, the entire base body is formed from elastic sealant.

[0081] The composite waterproofing anchor and the screw, in their interaction, ensure that the tightness required for a particular stress class of the composite waterproofing system is also ensured in the area of ​​the penetration.

Claims

1. A wall plug (1) for composite waterproofing systems with a hollow cylindrical main body (10), wherein the main body (10) has an opening (13) at a first end (11) in the axial direction for receiving a screw (20) wherein the main body (10) has a first section (A1) and a second section (A2) in the axial direction, wherein the first section (A1) is arranged between the second section (A2) and the first end (11) of the main body (10), wherein in the first section (A1), the main body (10) has a sealant (19) on its radially outer circumferential surface (14) and optionally on its radially inner circumferential surface and is free of the sealant (19) on its radially outer circumferential surface (14) in the second section (A2), wherein the sealant (19) is formed from a material that is different from the material from which the main body (10) is formed, and wherein the sealant (19) completely surrounds the main body (10) in the first section (A1) at the radially outer circumferential surface (14) of the main body (10) thus forming a ring, and wherein the sealant (19) is formed of an elastic material and configured to provide sealing properties on both sides of a composite waterproofing system when a screw (20) is screwed into the wall plug (1), characterised in that the main body (19) has in the first section (A1) on its radially inner circumferential surface (15) a projection (17) extending in the radial and the axial direction.

2. The wall plug (1) for composite waterproofing systems according to claim 1, wherein the first section (A1) of the main body (10) in which the main body (10) has sealant (19) extends in the axial direction of the main body (10) for between 10 mm and 15 mm; and / or wherein the first section of the main body (10) in which the main body (10) has sealant (19) extends in the axial direction for over between 20% and 70% of the total length of the main body (10) or for over between 30% and 60% of the total length of the main body (10) or for over between 40% and 50% of the total length of the main body (10).

3. The wall plug (1) for composite waterproofing systems according to claim 1 or 2, wherein the material forming the main body (10) has in the first section (A1) on the radially outer circumferential surface (14) of the main body (10) a recess (16) extending in the axial and radial direction, into which the sealant (19) is fully or partially inserted; wherein the recess (16) extends in the axial direction over the entire first section (A1) of the main body (10), wherein the recess (16) extends in the axial direction for over between 20% and 90% of the first section (A1) of the main body (10); or wherein the recess (16) extends in the axial direction for over between 40% and 85% of the first section (A1) of the main body (10); or wherein the recess (16) extends in the axial direction for over between 60% and 80% of the first section (A1) of the main body (10).

4. The wall plug (1) for composite waterproofing systems according to claim 3, wherein the recess (16) extends completely around the main body (10) in the circumferential direction.

5. The wall plug (1) for composite waterproofing systems according to claim 3 or 4, wherein a depth (16H) of the recess (16) in the first section (A1) in the radial direction of the main body (10) is between 0.25 mm and 2.5 mm; or wherein a depth (16H) of the recess (16) in the first section (A1) in the radial direction of the main body (10) is between 0.5 mm and 2.25 mm; or wherein a depth (16H) of the recess (16) in the first section (A1) in the radial direction of the main body (10) is between 1.0 mm and 2.0 mm.

6. The wall plug (1) for composite waterproofing systems according to one of the claims 1 to 5, wherein the protrusion (17) extends in the axial direction over the whole first section (A1); or wherein the protrusion (17) extends in the axial direction of the main body (10) for over between 25% and 95% of the first section (A1); or wherein the protrusion (17) extends in the axial direction of the main body (10) for over between 45% and 90% of the first section (A1); or wherein the protrusion (17) extends in the axial direction of the main body (10) for over between 65% and 85% of the first section (A1).

7. The wall plug (1) for composite waterproofing systems according to one of the claims 1 to 6, wherein the protrusion (17) extends circumferentially completely around inside the main body (10); or wherein a plurality of projections (17) separated from each other are provided distributed in the circumferential direction.

8. The wall plug (1) for composite waterproofing systems according to one of the claims 1 to 7, wherein a height (17H) of the projection (17) in the radial direction of the main body (10) is between 0.25 mm and 2.5 mm; or wherein a height (17H) of the projection (17) in the radial direction of the main body (10) is between 0.5 mm and 2.25 mm; or wherein a height (17H) of the projection (17) in the radial direction of the main body (10) is between 1.0 mm and 2.0 mm.

9. The wall plug (1) for composite waterproofing systems according to one of the claims 1 to 8, wherein the sealant (19) is an elastomeric body which completely surrounds the main body (10) at its radially outer circumferential surface of the main body (10), thus forming a ring.

10. The wall plug (1) for composite waterproofing systems according to one of the claims 1 to 9, wherein the main body (10) is made from plastic, in particular from polyamide, or metal.

11. The wall plug (1) for composite waterproofing systems according to one of the claims 1 to 10, wherein the main body (10) has, in a section at least one pair of axially extending slits that penetrate a circumferential surface of the main body (10); and / or wherein the main body (10) has, in a section circumferentially oriented grooves on its radially outer circumferential surface, which grooves alternate in the axial direction with circumferentially oriented projections.

12. A method of sealing a penetration (35) through a composite waterproofing system (30) comprising: providing a wall plug (1) for composite waterproofing systems according to one of claims 1 to 11, wherein an outer diameter (1D) of the wall plug (1) for composite waterproofing systems is adjusted to an inner diameter of the penetration (35D); inserting the wall plug (1) for composite waterproofing systems into the penetration (35); providing a screw (20), wherein an outer diameter (20D) of the screw is adjusted to an inner diameter (10D) of the main body (10) of the wall plug (1) for composite waterproofing systems; and screwing the screw (20) into the main body (10) of the wall plug (1) for composite waterproofing systems.

13. Use of a wall plug (1) for composite waterproofing systems according to one of claims 1 to 11 for sealing a penetration (35) through a composite waterproofing system (30).

14. A system for sealing a penetration (35) through a composite waterproofing system (30), comprising: a wall plug (1) for composite waterproofing systems according to any one of claims 1 to 11 that is inserted into the penetration (35); and a screw (20) screwed into the wall plug (1) for composite waterproofing systems, wherein the wall plug (1) for composite waterproofing systems and the screw (20) in combination are designed to ensure a tightness required for a respective stress class of the composite waterproofing system (30) also in the area of the penetration (35).

15. A method of sealing a penetration (35) through a composite waterproofing system (30) comprising: providing a wall plug (1") with a hollow cylindrical main body (10), wherein the main body (10") has an opening (13) at a first end (11) in the axial direction for receiving a screw (20); wherein the main body (10") has elastomer layers (101, 103) on its radially inner and radially outer exterior surfaces, which are each formed continuously in the axial direction and circumferential direction of the wall plug for composite waterproofing systems, and wherein the main body (10") has a layer of polyamide or metal (102) radially internal the outer elastomer layer (101, 103); wherein an outer diameter (1D) of the wall plug (1") for composite waterproofing systems is adjusted to an inner diameter of the penetration (35D); inserting the wall plug (1") for composite waterproofing systems into the penetration (35); providing a screw (20), wherein an outer diameter (20D) of the screw is adjusted to an inner diameter (10D) of the main body (10)" of the wall plug (1") for composite waterproofing systems; and screwing the screw (20) into the main body (10") of the wall plug (1") for composite waterproofing systems.

16. The method of claim 15, wherein in the wall plug (1") for composite waterproofing systems the thickness of each elastomer layer (101, 103) is between 1 mm and 3 mm or between 1.5 mm and 2 mm in the radial direction; and / or the thickness of the layer of polyamide or metal (102) is between 0.25 mm and 1.5 mm or between 0.4 mm and 0.8 mm in the radial direction.

17. Use of a wall plug (1") for composite waterproofing systems with a hollow cylindrical main body (10), wherein the main body (10") has an opening (13) at a first end (11) in the axial direction for receiving a screw (20); wherein the main body (10") has elastomer layers (101, 103) on its radially inner and radially outer exterior surfaces, which are each formed continuously in the axial direction and circumferential direction of the wall plug for composite waterproofing systems, and wherein the main body (10") has a layer of polyamide or metal (102) radially internal the outer elastomer layer (101, 103); for sealing a penetration (35) through a composite waterproofing system (30).