A unit consisting of an object to be attached to a wall and a fastening device with adhesive anchors.

Abstract

Assembly consisting of an object (1) with at least one fastening section (2) and a fastening device (3) attached or attachable thereto, which has a first fastening unit (10) with an adhesive anchor (100) for stable permanent adhesive fastening of the object (1) to a wall and comprises a second fastening unit (20) for stable permanent adhesive fastening which differs from the first fastening unit (10) in its physical design and in its adhesive properties, wherein - the adhesive properties of the first and second fastening unit (10, 20) differ in their curing time, - the first fastening unit (10) has a chamber that can be filled with a first adhesive and has a flat opening side extending parallel to a wall section to be assigned, which is bounded by an edge, and the second fastening unit (20) has a flat support plate (200) at least partially surrounding it, with at least one adhesive element (201, 202) which is provided with a second adhesive on its adhesive surface facing the wall section to be assigned, - the edge surrounding the flat opening side has a flat fixing surface facing the wall section to be assigned in the fastening state, which is provided with a fixing adhesive, - the second fastening unit (20) has a recess (203) whose clear width is dimensioned so that it at least partially surrounds the first fastening unit (10) in the fastened state, and - the first and second fastening units (10, 20) are provided with connecting elements (102, 204, 204') for attachment to a fastening section (2) of the object (1).

Description

[0001] The invention relates to a component consisting of an object with at least one fastening section and a fastening device attached or attachable thereto, which has a first fastening unit with an adhesive anchor for stable permanent adhesive fastening of the object to a wall, and to a method for attaching the object.

[0002] A fastening device with a permanent adhesive bond for attaching an object to a wall is shown in various embodiments in DE 695 05 150 T2. This known fastening device, designed for quick assembly, has in one embodiment a first L-shaped fastening part comprising an outer section with an adhesive layer on a pre-mounting surface, and a second fastening section forming an inner section and provided with a disc-shaped part and a hot-melt adhesive layer. The adhesive layer covers a mounting surface that forms the pre-mounting surface of the first L-shaped fastening part. A central opening is arranged in a leg of the first fastening part parallel to the pre-mounting surface, in which a projecting part connected to the second fastening section is rotatably mounted.The adhesive layer on the main mounting surface of the second mounting section consists of a hot melt adhesive which is melted by rotating the second mounting section using a rotary tool attached to the protruding part, and then hardens quickly when the rotary tool is stopped.

[0003] German patent DE 10 2012 008 115 A1 discloses a fastening element with adhesive mounting, in which a screw head is at least partially coated with a fixing adhesive and glued to a wall, in particular a vehicle wall. An adhesive washer is slid over the screw head, whereby the threaded part of the screw with the screw head is guided through an opening in the adhesive washer, the underside of which is coated with the actual adhesive. The adhesive washer is then pressed against the wall by means of a wing nut until the adhesive has cured, after which the bolt can be loaded.

[0004] JP 2014 - 1 543 A shows a construction unit with adhesive fastening consisting of a base part, which is attached to a wall or floor with four first adhesive strips, and a cover part, which is covered with four second adhesive strips and attached to the wall or floor.

[0005] Another assembly and a method for attaching an object to a wall are described in DE 10 2012 100 556 A1. In this assembly and method, an object, specifically a grab bar, is attached to a wall, for example, one covered with tiles, using a fastening device comprising several adhesive anchors, without screws or drill holes, solely by means of a stable, permanent adhesive bond. The adhesive anchor has a cavity or chamber with an opening facing the wall, which is surrounded by a raised rim. To create the adhesive bond, liquid adhesive is poured into the chamber through a filling opening. This adhesive hardens after several hours, e.g., approximately one day, resulting in a stable, permanently load-bearing bond between the adhesive anchor and the wall.The adhesive anchor, together with a connecting element, forms a mounting unit for the grab bar, which is attached to the wall using several such mounting units. For easy installation, the raised circumferential edge is designed as a fixing element. Its surface facing the wall is coated with a removable adhesive, which is covered by a film when new. This allows the adhesive anchor to be fixed to the wall at the desired location and held in place while the adhesive cures. The adhesive anchor, made of a rigid material, and / or the fixing element, made of a flexible material, are gas-permeable to allow gas to escape or air to enter during the curing process.

[0006] A fastening unit constructed in the manner described above is also disclosed in EP 1 440 246 B1, which provides further details regarding the adhesive anchor, the adhesive fastening, and pre-fixing. Sufficient filling of the cavity or chamber with the liquid adhesive can be verified by means of an inspection opening provided in addition to the filling opening, through which adhesive emerges when the chamber is completely filled. A similar fastening device, albeit for a solar generator module on a substructure, is disclosed in DE 44 16 884 A1.

[0007] The adhesive anchor can also be used to securely attach other fixtures besides grab bars to walls, particularly to tiles in a bathroom, as shown, for example, in (the unpublished) German patent application DE 10 2012 107 453 A1. This document describes a folding shower seat that is attached to tiles inside a shower cubicle using two mounting units with adhesive anchors of the aforementioned design, attached to the mounting sections. A wall support, resting on a base on the floor, is attached to the wall in the area of ​​the mounting section to aid installation and provide additional support. Such a folding shower seat is also shown in "varioporto, Der Duschklappsitz ohne bohren" (The folding shower seat without drilling). Delficare GmbH, 2013. URL: http: / / www.delficare.de / downloads / varioportokl.pdf, archived at: http: / / web.archive.org on October 8, 2013.

[0008] German patent DE 10 2012 221 174 A1 discloses a fastening unit for adhesive bonding with an adhesive anchor and an attached connecting element in the form of a threaded rod. The adhesive anchor itself has an adhesive surface with two sections on which adhesives with different properties, namely a fast-curing and a slow-curing adhesive, are applied. The adhesive anchor is an integrally connected body provided with a connecting element.

[0009] Further construction units with a fastening device for adhesive fastening are shown in DE 101 52 053 A1, DE 10 2009 031 188 A1, AT 248 074 B and DE 603 ​​17 715 T2.

[0010] The adhesive anchor used in the aforementioned mounting devices allows for high holding forces when attaching an object to the wall. However, this requires a strong bond between the liquid adhesive and the wall surface. This bond can be hindered by a film of cleaning agent or dirt particles that are difficult to detect visually, such as limescale deposits, resulting in an insufficient adhesive connection. Due to the curing process, which takes several hours, the quality of the adhesive bond cannot be immediately assessed by an installer and often only becomes apparent during use of the object. For objects subjected to relatively high loads, such as grab bars or shower seats, it is essential that the adhesive achieves its maximum strength.

[0011] The present invention is based on the objective of providing a construction unit and a method of the aforementioned type with which a firm adhesive bond between an object and a wall is achieved as reliably as possible.

[0012] This problem is solved in the assembly with the features of claim 1 by the fact that the fastening device comprises a second fastening unit that differs from the first fastening unit in its physical design and in its adhesive properties for stable, permanent adhesive fastening.

[0013] The method solves the problem by either attaching the first and second fastening units together to the wall after they have been attached to the mounting section of the object, or by attaching the first and second fastening units to the wall in successive mounting steps, in a first fastening method.

[0014] The two different adhesive mounting units ensure a more reliable bond between the object and the wall. The term "wall" (as used throughout the following text) should also include floor or ceiling where appropriate.

[0015] The embodiment according to the invention further consists in the fact that the adhesive properties of the first and the second fastening unit differ in their curing time (time until final strength is reached). For example, an advantageous embodiment consists in the second fastening unit, by virtue of its adhesive properties, producing a rapid adhesive bond during assembly, e.g., immediately or within seconds, while the adhesive properties of the first fastening unit are based on a liquid adhesive that only fully cures after several hours and only then provides a stable adhesive bond for permanent use. Since the second fastening unit also provides a high adhesive strength for permanent use, it can be tested during assembly whether the adhesive strength is sufficient for attaching the object to the wall.Check that the wall is sufficiently clean to ensure a strong adhesive bond and, for example, does not have any film that could inhibit adhesion. If necessary, clean again during installation. Furthermore, the connection using the second fastening unit prevents the adhesive bond of the first fastening unit from being compromised during testing during the curing process, which lasts several hours, by improper movement (and thus, for example, the resulting air intake), and thus avoids permanently reducing its holding power.

[0016] The embodiment of the invention, which is advantageous for the structure and function, further consists in the first fastening unit having a chamber fillable with a first adhesive, with a flat opening extending parallel to an associated wall section and bounded by an edge, and in the second fastening unit having a flat support plate at least partially surrounding it, with at least one adhesive element which is provided with a second adhesive on its adhesive surface facing the associated wall section (preferably already during manufacturing). It is advantageous if the first adhesive is a liquid adhesive with a curing time of several hours, e.g., on the order of one day, and the second adhesive is suitable for producing an immediately load-bearing, stable, and permanent adhesive fastening of the object.Before initial use, the adhesive surface of the second fastening unit in this design is covered with a removable protective layer. Such adhesive elements are commercially available (e.g., VHB adhesive (registered trademark of 3M)), and can be in the form of tapes or flat pads with an adhesive layer. From this group of adhesive elements, priority is given to those characterized by high immediate tack, high shear strength, and particularly good suitability for application to textured surfaces.

[0017] A further advantageous design for use and safe operation consists in the fact that the assembly is designed in such a way that the flat opening side of the first fastening unit and all adhesive surfaces of the second fastening unit lie in the same plane when fastened.

[0018] In the embodiment according to the invention, assembly is facilitated by the fact that the edge surrounding the flat opening side has a flat fixing surface facing the wall section to be assigned in the fastening state, which is provided with a fixing adhesive.

[0019] A further advantageous embodiment for assembly consists in the fact that the first fastening unit has a fixing element surrounding the fillable chamber, on which the edge surrounding the opening side is formed.

[0020] For the adhesive function, it is also advantageous that the fixing element and / or a cover wall of the chamber is / are designed to be air-permeable.

[0021] If it is provided that an adhesive element of the second fastening unit is positioned above the first fastening unit in the fastened state, it is prevented that, for example, water or cleaning agents penetrate from above into the adhesive area of ​​the first fastening unit and the area of ​​other adhesive elements of the second fastening unit, thereby impairing the adhesive bond.

[0022] In the embodiment according to the invention, a further advantageous measure for assembly and function is that the second fastening unit has a recess whose clear width is dimensioned so large that it at least partially (at least) circumferentially surrounds the first fastening unit when fastened. This simultaneously results in a large-area arrangement for the second fastening unit around the first fastening unit, which, for example, allows leverage forces to be effectively absorbed by the adhesive bond.

[0023] Further advantages for the design and function result in the embodiment according to the invention from the fact that the first and the second fastening unit are provided with connecting elements for attachment to a fastening section of the object.

[0024] The assembly and installation are also facilitated by the fact that the connecting elements are at least partially designed as screw connecting elements, clamp connecting elements or snap-fit ​​connecting elements, and that the fastening section is provided with counter-connecting elements adapted to the connecting elements.

[0025] Further advantages for installation and function are achieved by the additional wall support, which allows the object to be braced against a floor surface. For example, this provides increased vertical stability in the case of a shower seat.

[0026] An advantageous design is that the item is a fixture to be installed in a bathroom. Such fixtures include, in addition to the aforementioned grab bars and shower seats, items such as towel rails, mirror brackets, cabinet brackets, toilet paper holders, shower head holders, shower rails, shower baskets, and the like.

[0027] Unintentional leakage of liquid adhesive from the first chamber via panel joints or other irregularities is prevented by the inclusion of deformable sealants to seal the chamber of the first fastening unit in the area of ​​panel joints (or other depressions).

[0028] In this method, an advantageous approach is that, in the first fastening method, at least the second fastening unit is first adhered to the wall by means of at least one adhesive element, achieving the necessary or load-bearing adhesive strength immediately or within seconds after removing any protective film. Subsequently, the first fastening unit is attached to the wall by injecting liquid adhesive into the adhesive anchor and allowing it to cure. The adhesive anchor can, for example, be connected to the mounting plate and form an integrated component. It does not necessarily need to be pre-fixed before the liquid adhesive is applied, as it is held in place by the second fastening unit. However, it can also be pre-fixed.For example, the chamber of the adhesive anchor for filling with liquid adhesive can be sealed all around by means of a simple, non-self-adhesive sealing element.

[0029] A further advantageous embodiment of the method according to the first fastening method consists in the fact that, before the liquid adhesive is applied, the first fastening unit is fixed in a defined position on the wall after its adhesive surface has been exposed, simultaneously with the application of the liquid adhesive by means of the fixing element.

[0030] Another advantageous approach to the method involves loosening any existing connecting elements that link the first and / or second fastening unit to the object's mounting section before injecting the liquid adhesive into the adhesive anchor. The object is then removed from the two fastening units attached to the wall. Alternatively, the adhesive could be injected while the object or mounting section is attached to both fastening units. For this purpose, appropriate access points to the injection opening must be provided in the mounting section.

[0031] In a further embodiment of the method, in a first assembly step the first fastening unit is attached to the wall by gluing, in a second assembly step the second fastening unit is aligned with the first fastening unit and then attached to the wall by gluing, possibly together with the object, and in a third assembly step the object is additionally connected to the first fastening unit.

[0032] One implementation of the method involves first fixing the first mounting unit to the wall using the fixing element by adhesive during the initial assembly step. Subsequently, either in the first assembly step or after the second or third assembly step, the first adhesive is poured into the chamber via the filling opening to firmly anchor the first mounting unit to the wall. These measures contribute to easy installation.

[0033] Further possible variations of the method involve connecting the second mounting unit to the object either before or after it is attached to the wall in the second assembly step. If the second mounting unit is connected to the object before being attached to the wall, the object can already be securely attached to the wall using the second mounting unit. If, on the other hand, the second mounting unit is connected to the object after it has been attached to the wall, it may be possible to align it more precisely with the first mounting unit. It is also conceivable to connect the second mounting unit to the object after the object has been attached to the first mounting unit, i.e., in or after the third assembly step.

[0034] A further advantageous measure for the function is that the object is attached by means of several pairs of a first and a second fastening unit, wherein all pairs are attached to the wall according to the first fastening method or according to the second fastening method, insofar as their specific design (see various embodiments) allows this.

[0035] The aforementioned measures offer significant advantages when adhesively fixing objects, for example, in a bathroom, while avoiding damage to tiles from drilling. The two different fixing units allow the reliability of the adhesive bond to be checked during or immediately after installation, as the second fixing unit already forms a load-bearing bond, and the adhesive bond of the first fixing unit is not subjected to any force during the curing phase that would negatively affect it. For example, if the adhesive of the first fixing unit is a liquid adhesive poured into the chamber, which hardens completely after several hours, and the second adhesive is a thin, plate-like adhesive element (or...), the second fixing unit can be used to test the bond between the two units.The adhesive layer applied to an adhesive element arrangement, which creates a stable bond almost immediately upon being pressed against the wall, can also accommodate different load characteristics, i.e., weight loads from different objects. For example, a cabinet-like object generates relatively uniform static forces with a main component parallel to the wall, which can be absorbed particularly well by the rigid, strong adhesive bond of the first unit. With a shower seat, however, more variable forces are at play, which, depending on the design of the shower seat, can generate a large leverage force (torque), including relatively large force components perpendicular to the wall. These can be effectively distributed over a relatively large area by means of the adhesive elements of the second mounting unit, without placing excessive forces on the first mounting unit.The cured adhesive bond of the first mounting unit is particularly resistant, even in damp environments. The combination of both adhesive units therefore creates a reliable bond that can be adapted to different conditions and provides a stable fastening. To remove the second mounting unit, it can be detached from the wall using a spatula or flat screwdriver, and the first mounting unit can be twisted with pliers without damaging the tiles.

[0036] The invention is explained in more detail below with reference to exemplary embodiments and the drawings. The drawings show: Fig. 1. An arrangement of a fastening device with a first and a second fastening unit on a tiled wall section in a perspective view from above. Fig. 2 A schematic view of a fastening device attached to a fastening section of an object, with a first and a second fastening unit from below, Fig. 3A and Fig. 3B the first fastening unit after Fig. 1 in an arrangement on a tiled wall section in the assembled state and in an exploded view in perspective view, Fig. 4 a fastening device with a first and a second fastening unit in relation to a wall section in perspective exploded view, Fig. 5 Another embodiment of a fastening device with a first and a second fastening unit in relation to a wall section in a perspective exploded view, Fig. 6. A further embodiment of a fastening device with a first and a second fastening unit on a wall section in a perspective view from above. Fig. 7 Another embodiment of a fastening device arranged on a wall section with a first and second fastening unit in a perspective view from above, Fig. 8 Another embodiment of a fastening device with a first and second fastening unit in relation to a wall section in perspective exploded view, Fig. 9 adhesive elements of a second fastening unit of the fastening device in two different configurations, Fig. 10 Another embodiment of a fastening device arranged on a wall section with a first and a second fastening unit in a perspective view from above, Fig. 11 the fastening device according to Fig. 10 in exploded view, Fig. 12 a further embodiment not according to the invention of a fastening device arranged on a wall section with a first and a second fastening unit in a perspective view from above, Fig. 13 who are in Fig. 12 shown non-inventive fastening device in perspective exploded view, Fig. 14A and Fig. 14B a folding shower seat attached to a wall by means of a fastening device, Fig. 15 a folding shower seat after Fig. 14A in perspective exploded view, Fig. 16 a fastening section and a wall support of the folding shower seat according to Fig. 14a in perspective view and Fig. 17 a section of the folding shower seat after Fig. 14a with a fastening device.

[0037] In Fig. Figure 1 shows a fastening device 3 designed for the stable, permanent adhesive fastening of an object 1 to a wall (or floor or ceiling) without drilling. The object 1 can be various furnishings, particularly bathroom fixtures, such as a folding shower seat (see Figure 1). Fig. 14A, Fig. 14B, Fig. 15, Fig. 16 and Fig. 17) Grab handle, mirror or its mounting device, towel rail, shower basket, shower head holder, shower rail, soap dish, toilet paper holder, hooks or the like. How Fig. Figure 2 shows that the object 1 is provided with an adapted fastening section 2 to which the fastening device 3 is stably attached or can be attached.

[0038] The fastening device 3 consists of a first fastening unit 10 and a second fastening unit 20, which are designed differently. The first fastening unit 10 has an adhesive anchor 100 extending over a surface parallel to the wall, while the second fastening unit 20 has a support plate 200 extending over a surface parallel to the wall. In the case of the Fig. In the embodiment shown in Figure 1, the adhesive anchor 100 is inserted into a recess 203 of the support plate 200 and separated from it. At least one connecting element 102 is provided for attaching the first fastening unit 10 to the fastening section 2, with which the fastening section 2, and thus the object 1, is stably fixed to the adhesive anchor 100. The connecting element 102 is, for example, designed as a screw that is screwed into a corresponding threaded bore in the adhesive anchor. The adhesive anchor 100 has a filling opening 103 for introducing liquid adhesive into a chamber of the adhesive anchor 100, as well as a control opening 104 through which excess adhesive escapes when the chamber is completely filled with adhesive. The fastening device 3 is, for example, glued onto a tiled wall section, as shown in Figure 1. Fig. 1 shown.

[0039] As from Fig. Figure 2, which shows the fastening section 2 with the fastening device 3 from the underside (adhesive side), further shows that the adhesive anchor 100, which is circular in plan view, has a circumferential annular fixing element 101 along its circumferential edge. This fixing element 101 circumferentially delimits the chamber for receiving the adhesive (first adhesive) of the first fastening unit 10, thus forming a flat, extended opening side of the chamber. The side of the fixing element 101 lying in the plane of the opening forms a fixing surface, which, coated with a fixing adhesive, serves to attach the adhesive anchor 100 to the wall during installation and is covered by a removable protective film before use or when new.Once the adhesive anchor 100 is fixed to the wall by means of the fixing element 101, the first adhesive can be poured into the chamber via the filling opening 103. The curing of the first adhesive then begins, typically lasting several hours, e.g., about a day. After curing, the first fastening unit 10, thus attached to the wall by means of the adhesive fixing, is load-bearing enough to permanently and stably hold the object 1 attached to it via the fastening section 2, provided the wall does not have any layer or contamination that impairs the adhesive strength. The adhesive bond must not be subjected to any load during curing to avoid compromising the required final strength. To ensure gas escape or air ingress during the curing process, the adhesive anchor 100 is provided with a solid, porous wall, e.g., made of sintered material, and / or the fixing element 101 is made of a gas- or air-permeable material.manufactured from air-permeable material. The construction can be designed, for example, as detailed in the aforementioned publications EP 1 440 246 B1 or DE 10 2012 100 556 A1.

[0040] In the Fig. 3A and Fig. Figure 3B shows the first fastening unit 10 in conjunction with a wall section or in an exploded view, with the cured first adhesive 105 shown as a separate body. To prevent the first adhesive 105 from escaping in its liquid state in the joint area of ​​the wall section between the tiles, deformable sealants 106 are used between the fixing element 101 and the joints, such as a kneadable compound or sealant from a tube. As shown in Figure 3B, the first fastening unit 10 is shown separately in conjunction with a wall section or in an exploded view, with the cured first adhesive 105 being shown as a separate body. To prevent the first adhesive 105 from escaping in its liquid state in the joint area of ​​the wall section between the tiles, deformable sealants 106 are used between the fixing element 101 and the joints, such as a kneadable compound or sealant from a tube. Fig. As can be seen in Figure 2, the recess 203 of the support plate 200 is sufficiently large to surround the adhesive anchor 100, preferably with a gap, so that the sealants 106 can deform freely and adapt to the joints.

[0041] As from Fig. As further shown in Figure 2, the support plate 200 is provided outside the recess 203 with an arrangement of adhesive elements 201, 202. In the illustrated embodiment, these elements are configured as a long, curved (or alternatively, for example, straight) strip extending over the recess 203 and positioned at the top (with respect to the direction of gravity), and several smaller individual adhesive sections arranged laterally to the recess 203. The adhesive surfaces of the adhesive elements 201, 202 facing the wall when bonded are flat and lie in the plane of the fixing surface of the fixing element 101 or the flat opening side of the adhesive anchor 100, so that the adhesive elements 201, 202 together with the adhesive anchor 100 form a stable adhesive bond in a common plane. The adhesive surfaces of the adhesive elements 201, 202 are preferably covered with a removable protective film before initial use or when new.When the support plate 200 is pressed down after removing the protective films, the adhesive layers present on the adhesive surfaces immediately create a load-bearing, permanently stable adhesive bond. The adhesive elements 201, 202 are preferably made of a film-like, e.g., somewhat elastic and / or flexible material, which has a thickness of at most 3 or 2 mm, or even at most 1 mm.

[0042] In many cases, attaching the object 1 to a wall using only one fastening device 3 with only one first and second fastening unit 10, 20 is sufficient. For other objects 1, such as shower seats, grab bars, or bathroom cabinets, fastening devices 3 with multiple pairs of a first and a second fastening unit 10, 20 of the above-described configuration are advantageous or necessary. In these cases, the object 1 is designed with a corresponding number of fastening sections 2 or a fastening section 2 with several adapted fastening points for attaching the respective first and second fastening units 10, 20. The first fastening unit 10 is attached to the fastening section 2 via the aforementioned connecting element 102, preferably a screw connection. Alternatively, several connecting elements 102 can be arranged on the adhesive anchor 100.

[0043] the connecting means can also be designed differently than screw connections, such as plug, snap or clamp connections.

[0044] At the in Fig. In the embodiment shown in Figure 1, the support plate 200 can also be attached to the mounting section 2 via several mounting holes using screws. Other connecting devices, such as snap-fit, plug-in, or clamp-on connectors, can also be used here.

[0045] At the in Fig. In the embodiment of the fastening device 3 shown in Figure 4, the first fastening unit 10 is designed according to the embodiments mentioned above, while the second fastening unit 20 has two lateral strip-shaped adhesive elements 201 to be attached next to the recess 203.

[0046] At the in Fig. In the embodiment shown in section 5, in addition to the two shown in Fig. In the 4 shown lateral adhesive elements 201, an upper arc-shaped adhesive element or adhesive element section is provided, which extends above the recess 203, so that unfavorable ingress of moisture is also prevented here. Furthermore, pin-shaped or screw-shaped connecting elements 204 of the second fastening unit 20 are shown, which are guided through bores in the support plate 200 and inserted into corresponding receptacles or threaded receptacles in the fastening section 2 for connection with the object 1.

[0047] Fig. Figure 6 shows the fastening device 3 with pin-like connecting elements 204' inserted into the support plate 200 of the second fastening unit 20 or permanently connected to the support plate 200 from the outset, for example in the form of screw bolts or sleeves with internal threads. Such connecting elements 204', such as screw bolts, sleeves, or nuts, can be designed, for example, as press-fit elements and / or fixed by welding or bonding. Similarly, a thread can simply be provided in the support plate 200. The support plate 200 can be attached to the fastening section 2 either at the factory or during on-site assembly, preferably in a detachable manner. The connecting elements 204, 204' can advantageously be designed (like the connecting elements 102) such that they are accessible from the front (i.e., the side facing away from the wall) of the object 1.

[0048] At the in Fig. In the embodiment shown in Figure 7, the first fastening unit 10 is again designed according to the preceding embodiments, while the second fastening unit 20 is equipped with an annular support plate 200 to which pin-like connecting elements 204' are attached for connection with the fastening section 2. Screw-shaped connecting elements are also suitable here.

[0049] Fig. Figure 8 shows a construction of the second fastening unit 20 with an annular support plate 200 accordingly. Fig. 7. Here, the arrangement of the adhesive elements 201 is formed by individual connected segments (see. Fig. 9), which can be arranged in a substantially circular pattern beneath the support plate 200. For example, the adhesive elements 201 form a continuous adhesive tape, in which, for instance, triangular recesses are provided for easy adjustment. In the ready-to-use second fastening unit 20, the adhesive elements 201 are firmly connected to the support plate 200 by an adhesive bond, as is also advantageously the case in the preceding embodiments. However, other connections between the support plate 200 and the adhesive elements 201, such as suitable welded joints, are also possible. The support plate 200 can be made of metal or plastic, as can also be the case in the preceding embodiments of the second fastening unit 20.

[0050] In the Fig. 10 and Fig. In the embodiment shown in Figure 11, the support plate 200 consists of a flat outer support section, which in this embodiment has a substantially square circumferential contour, and an inner section in which the recess 203 is formed as a dimple for receiving the adhesive anchor 100. A through-hole for the centrally arranged connecting element 102 of the first fastening unit 10 is provided in the dimple. The filling opening 103 and the inspection opening 104 are accessible via associated through-holes. Here, too, the planes of the adhesive surfaces of the adhesive elements 201 and the opening side of the adhesive anchor 100 lie in the same wall-side plane when the adhesive is in place. The section of the support plate 200 that has the dimple is provided with several through-holes through which the adhesive anchor 100 can be viewed and, for example, the sealant 106 can be applied.The support plate 200 is in turn attached to the relevant fastening section 2 of the object 1 by means of several connecting elements 204'.

[0051] Fig. 11 indicates when assembling the second fastening unit 20 after Fig. 10 the arrangement of strip-shaped adhesive elements 201 in the edge areas of the support plate 200. Furthermore, the sealants 106 are shown in the area of ​​the plate joints.

[0052] The Fig. 12 and Fig. Figure 13 shows a further embodiment of the fastening device 3 that is not according to the invention. Here, the first fastening unit 10 and the second fastening unit 20 are integrally integrated, the first fastening unit 10 being designed according to the preceding embodiments and forming the central section of the fastening device 3. Several radially projecting extensions are integrally formed on the adhesive anchor 100, forming connected parts of the support plate 200 via the adhesive anchor 100. Adhesive elements 201 of the second fastening unit 20 are attached under the extensions of the support plate 200 and 200', respectively. In this case, for example, it is sufficient to fasten the fastening device 3 to a correspondingly designed fastening section 2 by means of a single connecting element 102, such as a central fastening screw. Alternatively, however, further connecting elements 204 or 205 can be used.204' as in the preceding embodiments. Other forms with one-piece, adhesive anchor 100 and support plate 200 integrated first and second fastening units 10, 20 are also possible.

[0053] In an advantageous procedure, the first fastening unit 10 and the second fastening unit 20 are attached to the wall simultaneously by adhesive bonding. For this purpose, the two fastening units 10 and 20 are pre-positioned on the mounting section 2 of the object 1 by means of the respective connecting elements 102, 204, and 204', preferably detachably, before being attached to the wall. This attachment can be carried out at the factory or on-site before installation. If the adhesive elements 201 and 202 are covered with a protective film, this is removed before the adhesive bond with the wall is established. Similarly, any protective film present on the fixing element 101 is also removed before it is attached to the wall. The object is then positioned on the wall in the desired location and pressed down, so that the adhesive bond is established by means of the adhesive elements 201 and 202 and the fixing element 101.The adhesive elements 201, 202 develop the necessary strong adhesive force practically immediately, or at least within a short time, e.g., a few seconds, depending on the adhesive. Simultaneously, the first fastening unit 10, or rather its adhesive anchor 100, is pre-fixed by means of the fixing element 101 and holds itself in place, so that the liquid adhesive can be poured in through the filling opening 103 and the final adhesive force of the first fastening unit 10 is then achieved through curing over several hours.

[0054] To fill the chamber of the adhesive anchor 100 with the liquid adhesive, the object 1, with its fastening section 2, is detached from the fastening device 3, namely both the first and second fastening units 10, 20, by opening the respective connecting elements 102, 204, 204', to simplify the filling process. Once the liquid adhesive has been filled into the chamber of the adhesive anchor 100, the object 1, with its fastening section 2, can be reattached to the fastening device 3 by closing the connecting elements 102, 204, 204'. A load test can then be performed, as the second fastening unit 20 has developed its full adhesive strength. The adhesive of the first fastening unit 10 can cure without hindrance.

[0055] In an alternative embodiment of the first fastening method, with simultaneous attachment of the two fastening units 10, 20, the adhesive can also be introduced into the chamber of the adhesive anchor 100 without first detaching the object 1 with its fastening section 2 from the fastening device 3. In this case, however, the fastening section must be provided with suitable access for filling the adhesive via the filling opening 103 and with a control means to detect that it is completely filled.

[0056] To attach an object 1 to a wall using a fastening device 3, a different procedure can also be used, depending on the setup. In a first assembly step, the first fastening unit 10 is attached to the wall using the adhesive anchor 100. To ensure correct positioning of the adhesive anchor 100, it can be temporarily attached to the corresponding, adapted fastening point of the fastening section 2 of the object 1 using the connecting element 102 and fixed to the wall after removing the protective film from the fixing element 101. The object 1 can then be removed from the adhesive anchor 100 after removing the connecting element 102. The liquid adhesive 105 can then be poured into the chamber via the filling opening 103 until complete filling is confirmed via the inspection opening 104.

[0057] In a second assembly step, the second fastening unit 20 is positioned in alignment with the adhesive anchor 100. For this purpose, the adhesive surfaces of the adhesive elements 201 and 202 are freed from their protective films, and the support plate 200 with the adhesive elements is pressed against the wall. The positioning of the support plate 200 relative to the adhesive anchor 100 can be achieved, for example, via the recess 203. Additional adjustment aids may be provided on the adhesive anchor 100 and the support plate 200 to ensure precise positioning.

[0058] In a third assembly step, the fastening section 2 or the object 1 can be attached to the adhesive anchor 100 by means of the connecting element 102. The fastening section 2 is designed such that the threaded bore of the adhesive anchor 100 is accessible from the outside via the connecting element 102, e.g., through a corresponding bore, and the fastening section 2 is clamped against the adhesive anchor 100 directly or via intermediate elements by means of a screw head of the connecting element 102. If the support plate 200 is not yet connected to the fastening section 2 in this assembly state (see the alternative possibility of the second assembly step above), the connection between the support plate 200 and the fastening section 2 can be made in this assembly state. In the embodiment according to Fig. 12 or 13, such an additional connection between the support plate 200 and the fastening section 2 is not required.

[0059] The Fig. 14A, Fig. 14B, Fig. 15, Fig. 16 and Fig.Figure 17 shows, as an embodiment of an object 1 to be attached by means of the fastening device 3, a folding shower seat as specified in the aforementioned, unpublished German patent application DE 10 2012 107 453. For attaching the fastening device 3 of the aforementioned assembly and in the manner described above, the folding shower seat has a fastening section 2, which has receptacles for attaching the first and second fastening units 10, 20 with the adhesive anchor 100 and the support plate 200, as well as the connecting element 102 and the further connecting elements 204, 204'. A wall support 4 serves for correct positioning at a defined height and for additional vertical support. A foldable leg 5 with height-adjustable feet 6 is arranged in the front area of ​​the folding shower seat. A bracket 7 serves for folding up the folding shower seat while folding in the leg 5.The folding shower seat is attached to the wall support 4 at the desired height by means of a support structure 40 of the wall support 4 and a complementary support structure 41 in the area of ​​the fastening section 2 and is then fastened to the wall by means of the fastening device 3, whereby the aforementioned assembly steps are carried out.

[0060] The load-bearing capacity of the adhesive fixing of the folding shower seat can be tested immediately after installation. The second fixing unit 20 already provides a sufficiently strong and load-bearing adhesive bond, provided the wall or tile surface is clean enough for a strong adhesive connection. If the adhesive bond proves to have sufficient load-bearing capacity, the curing of the first adhesive 105 of the first fixing unit 10 is not affected. Thus, after the first adhesive 105 has cured, this unit provides an additional stable and permanent adhesive bond. If the adhesive bond of the second fixing unit 20 is insufficient after installation due to an unclean wall, the surface must be cleaned again to ensure a reliable adhesive bond.

Claims

[1] Assembly consisting of an object (1) with at least one fastening section (2) and a fastening device (3) attached or attachable thereto, which has a first fastening unit (10) with an adhesive anchor (100) for stable permanent adhesive fastening of the object (1) to a wall and comprises a second fastening unit (20) for stable permanent adhesive fastening which differs from the first fastening unit (10) in its physical design and in its adhesive properties, wherein - the adhesive properties of the first and second fastening unit (10, 20) differ in their curing time, - the first fastening unit (10) has a chamber that can be filled with a first adhesive and has a flat opening side extending parallel to a wall section to be assigned, which is bounded by an edge, and the second fastening unit (20) has a flat support plate (200) at least partially surrounding it, with at least one adhesive element (201, 202) which is provided with a second adhesive on its adhesive surface facing the wall section to be assigned, - the edge surrounding the flat opening side has a flat fixing surface facing the wall section to be assigned in the fastening state, which is provided with a fixing adhesive, - the second fastening unit (20) has a recess (203) whose clear width is dimensioned so that it at least partially surrounds the first fastening unit (10) in the fastened state, and - the first and second fastening units (10, 20) are provided with connecting elements (102, 204, 204') for attachment to a fastening section (2) of the object (1). [2] Building unit according to claim 1, characterized by , that the assembly is designed in such a way that the flat opening side of the first fastening unit (10) and all adhesive surfaces of the second fastening unit (20) lie in the same plane when fastened. [3] Building unit according to one of the preceding claims, characterized by , that the first fastening unit (10) has a fixing element (101) surrounding the fillable chamber, on which the edge surrounding the opening side is formed. [4] Building unit according to claim 3, characterized by , that the fixing element (101) and / or a cover wall of the chamber is / are designed to be air-permeable. [5] Building unit according to one of the preceding claims, characterized by, that an adhesive element (201, 202) is arranged above the first fastening unit (10) in the fastening state. [6] Building unit according to any one of the preceding claims, characterized by , that the connecting elements (102, 204, 204') are designed at least in part as screw connecting elements, clamp connecting elements or snap-fit ​​connecting elements and that the fastening section (2) is provided with connecting counter elements adapted to the connecting elements (102, 204, 204'). [7] Building unit according to one of the preceding claims, characterized by , that an additional wall support (4) is provided, by means of which the object (1) can be supported against a base on the floor. [8] Building unit according to one of the preceding claims, characterized by , that the item (1) is a fixture to be installed in a bathroom. [9] Building unit according to one of the preceding claims, characterized by, that deformable sealants (106) are included to seal the chamber of the first fastening unit (10) in the area of ​​plate joints. [10] Method for attaching an object (1) to a wall without drilling by means of a construction unit according to one of the preceding claims, characterized by , that in a first fastening method the first fastening unit (10) and the second fastening unit (20) are attached to the wall together after they have previously been attached to the fastening section (2) of the object (1), or that in a second fastening method the first and the second fastening unit (10, 20) are attached to the wall in successive mounting steps. [11] Method according to claim 10, characterized by , that in the first fastening method, at least the second fastening unit (20) is first glued to the wall by means of the at least one adhesive element (201, 202) under adhesive force necessary for load-bearing capacity, achieved immediately or within seconds after removal of any protective film that may be present, and that the first fastening unit (10) is then attached to the wall by introducing liquid adhesive into the adhesive anchor (100) and allowing it to harden. [12] Method according to claim 11, characterized by , that the first fastening unit (10) is fixed in a defined position on the wall before the liquid adhesive is applied by means of the fixing element (101) after its adhesive surface has been exposed, simultaneously with the application of at least one adhesive element (201, 202). [13] Method according to claim 11 or 12, characterized by, that before the liquid adhesive is applied to the adhesive anchor (100) existing connecting elements (102, 204, 204') with which the first and / or the second fastening unit (10, 20) was / were connected to the fastening section (2) of the object (1) are loosened and the object (1) is removed from the two fastening units (10, 20) glued to the wall. [14] Method according to claim 10, characterized by , that - in a first assembly step the first fastening unit (10) is attached to the wall by gluing, - in a second assembly step the second fastening unit (20) is aligned with the first fastening unit (10) and then attached to the wall by gluing and - in a third assembly step the object (1) is connected to the first fastening unit (10). [15] Method according to claim 14, characterized by, that in the first assembly step the first fastening unit (10) is first fixed to the wall by means of a fixing element (101) by gluing and that subsequently in the first assembly step or after the second or the third assembly step the first adhesive is filled into the chamber via the filling opening (103) to firmly anchor the first fastening unit (10) to the wall. [16] Method according to claim 14 or 15, characterized by , that in the second assembly step the second fastening unit (20) is connected to the object (1) before or after it is attached to the wall. [17] Method according to any one of claims 10 to 16, characterized by , that the object (1) is attached by means of several pairs of a first and a second fastening unit (10, 20), wherein all pairs are attached to the wall according to the first fastening method or according to the second fastening method.

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