System for fastening attachments to a substrate with an insulation layer

Abstract

Fastening system (1) for fastening an attachment (18) to a substrate (13) with an insulation layer (16), the fastening system (1) comprising an anchor bolt (2), with a first area (3) for anchoring in the substrate (13), a second area (4) to which the attachment (18) can be fastened, and a stop (5), a mounting tool (6) to form an opening in the insulation layer (16), and a sealing element (7) adapted to be disposed at the stop (5) after the mounting tool (6) has been removed and to seal the opening in the insulation layer (16) as well as a corresponding method.

Claims

1. Fastening system (1) for fastening an attachment (18) to a substrate (13) with an insulation layer (16), the fastening system (1) comprising: an anchor bolt (2), with a first area (3) for anchoring in the substrate (13), a second area (4) to which the attachment (18) can be fastened, and a stop (5), a mounting tool (6) configured to directly contact the insulation layer so as to remove or expand the insulation layer (16) around the anchor bolt (2) by arranging the mounting tool (6) on the anchor bolt (2) to form an opening in the insulation layer (16), and a sealing element (7) adapted to be disposed at the stop (5) after the mounting tool (6) has been removed and to seal the opening in the insulation layer (16).

2. The fastening system (1) according to claim 1, wherein the anchor bolt (2) comprises a plastic rod (8) in the first area (3) and a metal rod (9) in the second area (4).

3. The fastening system (1) according to claim 2, wherein the metal rod (9) has an external thread.

4. The fastening system (1) according to claim 1, wherein the anchor bolt (2) is configured such that in an assembled state at least a part of the anchor bolt (2) projects from the insulation layer.

5. The fastening system (1) according to claim 1, wherein the mounting tool (6) comprises at least one means (10) for removing the insulation layer (16) around the anchor bolt (2) when the mounting tool (6) is rotatably inserted.

6. The fastening system (1) according to claim 1, wherein the mounting tool (6) has at least one projection (11) for resting on the side of the insulation layer (16) facing away from the substrate (13).

7. The fastening system (1) according to claim 1, wherein the sealing element (7) is configured such that, in an assembled state, it rests on the side of the insulation layer (16) facing away from the substrate (13).

8. A method for fastening an attachment (18) to a substrate (13) having an insulation layer (16), comprising the steps of: inserting an anchor bolt (2) into a borehole in the insulation layer (16) and in the substrate (13); arranging a mounting tool (6) on the anchor bolt (2), inserting the mounting tool (6) into the insulation layer (16), wherein the mounting tool (6) is configured to directly contact the insulation layer so as to remove or expand the insulation layer (16) around the anchor bolt (2) to form an opening in the insulation layer (16), and removing the mounting tool (6) and arranging a sealing element (7) at a stop (5) of the anchor bolt (2) to seal the opening in the insulation layer (16).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGS. 1a-1c (collectively referred to as FIG. 1 herein) show cross-sections through components of an embodiment of the fastening system according to the invention, and

(2) FIGS. 2a-2e show an example of the installation of the embodiment shown

DETAILED DESCRIPTION OF THE INVENTION

(3) FIG. 1 shows an exemplary embodiment of the fastening system 1 according to the invention. This fastening system 1 has at least three elements, an anchor bolt 2, a mounting tool 6 and a sealing element 7.

(4) According to the invention, the anchor bolt 2 has two areas. A first area 3 provides the anchoring in a substrate. In the embodiment shown in FIG. 1, this first area 3 is formed by a plastic rod 8. This plastic rod 8 is pushed into a borehole in which, for example, an adhesive is located and with the adhesive the plastic rod 8 and thus the entire fastening system 1 is anchored in the borehole. The anchor bolt 2 also has a second area 4 to which an attachment can be fastened. In the embodiment shown in FIG. 1, the second area 4 is formed by a metal bolt 9. In this embodiment, the metal bolt 9 has an external thread, to which the attachment can be fastened with the aid of a nut, for example. In addition, the external thread can also be used to attach the sealing element 7 to the metal bolt 9. The plastic rod 8 and the metal bolt 9 can be arranged together in many different ways. This connection, for example, can be established on the construction site. Preferably, however, the plastic rod and the metal bolt are already connected to each other at the factory. In the embodiment shown in FIG. 1, the metal bolt 9 has a further external thread which is screwed into an opening in the plastic rod 8. However, the person skilled in the art is also aware of other ways of firmly connecting these two elements.

(5) The anchor bolt 2 also has a stop 5. In the embodiment shown in FIG. 1, the stop 5 is formed by the fact that the first area 3 and the second area 4 have different diameters. But the person skilled in the art also knows other means to make a stop 5 at the anchor bolt 2. This stop 5 does not necessarily have to be arranged at the transition from the first area 3 to the second area 4 as in FIG. 1. The stop can also be located in the first area 3 or in the second area 4.

(6) The mounting tool 6 of the fastening system 1 according to the invention is configured to form an opening in an insulation layer. It preferably has means to which remove the insulation layer, for example a plaster layer and partly a layer of insulation material around the anchor bolt 2, when the mounting tool 6 is rotated. Preferably, the mounting tool 6 is used to remove material from the insulation layer so that there is a permanent opening. The opening thus formed preferably extends annularly around the anchor bolt 2 arranged in the insulation layer. In the embodiment of the fastening system 1 shown in FIG. 1, the mounting tool 6 also has a projection 11, which is configured in such a way that it can rest on the side of the insulation layer facing away from the substrate. In the present embodiment, the projection 11 is circular in shape and extends from the mounting tool 6 in all directions. However, the person skilled in the art is also aware of other configurations for a suitable projection 11.

(7) In the embodiment shown in FIG. 1, the mounting tool 6 can be arranged in a predefined position relative to the anchor bolt 2. For example, the mounting tool 6 is configured in such a way that a counter stop 5a of the mounting tool 6 can be arranged at the stop 5 of the anchor bolt 2. In addition or alternatively, the mounting tool 6 may also be configured to engage the end of the second area 4 of the anchor bolt 2, which is spaced from the first area 3. This engaging ensures that a rotary movement of the mounting tool 6 is transmitted to the anchor bolt 2. For this purpose, the mounting tool 6 and the anchor bolt 2 may have corresponding recesses and projections.

(8) During installation, for example, the anchor bolt 2 can be arranged together with the mounting tool 6 arranged on it in a borehole in the insulation layer and in the substrate. This may achieve that a movement of the mounting tool 6 in the direction of the substrate leads to a similar movement of the anchor bolt.

(9) The mounting tool 6 and the anchor bolt 2 can also be rotated in the direction of the substrate, that is into the borehole. For example, a rotary movement can be exerted on the mounting tool 6. In a preferred embodiment, the mounting tool 6 and the anchor bolt 2 are configured in such a way that they can be arranged together in a rotationally fixed manner, that is a rotational movement of one element is transferred to the other element. This means that when the mounting tool 6 is rotated into the borehole, the anchor bolt 2 is also rotated into the borehole.

(10) The fastening system 1 according to the invention also has a sealing element 7. The sealing element 7 is configured in such a way that it can seal the opening in the insulation layer formed by the mounting tool 6. For this purpose, the sealing element is arranged at the stop 5.

(11) In the embodiment of the present invention illustrated in FIG. 1, the sealing element 7 comprises a metal washer 7a, preferably made of stainless steel, and a circular sealing member 7b.

(12) FIGS. 2a-2e illustrate the various steps involved in installing the embodiment of the fastening system 1 according to the invention shown in FIG. 1. The wall to which the attachment is to be fastened has a substrate 13 and a layer of insulation material 14. In the example shown here, a plaster layer 15 is arranged on the layer of insulation material 14. In the present invention, the layers above the substrate 13 are referred to as insulation layer 16, irrespective of how many layers that layer consists of and whether it has layers which are not mainly used for insulation, such as plaster layer 15.

(13) A hole was drilled into the insulation layer 16 and into the substrate 13 and an adhesive was introduced into the hole. FIG. 2a shows how the anchor bolt 2 and the mounting tool 6—together in this example—are arranged in the borehole. As already explained above, in this embodiment the anchor bolt 2 and the mounting tool 6 are arranged in a torque proof manner. Thus a tool can be arranged on the mounting tool 6 with which the mounting tool 6 and the anchor bolt 2 arranged on it can be driven into the borehole in rotation. For this purpose, the mounting tool 6 can have a corresponding tool holder, for example an external hexagon. In principle, however, the mounting tool 6 can also be arranged without tools, for example directly in the borehole by the person installing the fastening system. For this purpose, the mounting tool can, for example, have a corresponding grip surface.

(14) The rotating driving of anchor bolt 2 and mounting tool 6 ensures that anchor bolt 2 can be well placed in the substrate 13 and that the mounting tool 6 can form the opening in the insulation layer 16. The anchor bolt 2 and the mounting tool 6 are driven into the insulation layer 16 and into the substrate 13 until the projection 11 rests on the side of the insulation layer 16 facing away from the substrate. This ensures that the anchor bolt 2 is as deep as necessary in the substrate 13. It is also ensured that the mounting tool 6 forms the opening in the insulation layer 16 to the desired depth. In addition, the mounting tool 6 ensures that the anchor bolt 2 is fixed radially in the opening at a position determined by the geometry of the mounting tool 6 and that the stop 5 of the anchor bolt 2 is axially located at a position determined by the arrangement of the projection 11 relative to the counter stop 5a. The mounting tool 6 remains in this position as shown in FIG. 2b, preferably until the anchor bolt 2 is held firmly in this position. If anchor bolt 2 is fixed with an adhesive, this period may depend on the adhesive used.

(15) Afterwards, the mounting tool 6 is removed from the anchor bolt 2 (see FIG. 2c). The desired opening then remains in the insulation layer 16, which in this example extends concentrically around the anchor bolt 2. This annular gap ensures that deformations of anchor bolt 2 under service load are absorbed without constraint.

(16) As shown in FIG. 2d, the sealing element 7 is then arranged on the installed anchor bolt 2. In this example, the sealing element 7 is fastened to the external thread of the second area 4 of the anchor bolt 2 with a nut 17 and an attachment 18. In this embodiment, the attachment 18 is fastened to the anchor bolt 3 as a clamping part between the washer 7a of the sealing element 7 and the nut 17. Due to the fixed axial position of the stop 5 relative to the outer surface of the insulation layer 16, the sealing element 7 arranged at the stop of the anchor bolt 2 is preferably compressed with the nut 17 against the stop 5 and against the outer surface of the insulation layer 16 in order to achieve the best possible sealing effect.

(17) FIG. 2e shows that the sealing element 7, when installed, rests at least partially on the outer surface of the insulation layer 16. This allows the opening in the insulation layer 16 to be effectively sealed. The sealing element 7 is located above the opening and thus prevents moisture from entering into the opening. The sealing element 7 rests on the edge of the opening on the insulation layer 16 and thus seals this area. The sealing element 7 is so large, that is it extends so far into the plane of the insulation layer 16 that it covers the opening in the insulation layer 16 even when the anchor bolt 7 and the associated sealing element 7 move.