WO2023021118A1

WO2023021118A1 - Spacer for connecting an insulating plate to a wall panel

Info

Publication number: WO2023021118A1
Application number: PCT/EP2022/073018
Authority: WO
Inventors: Peter Schröder
Original assignee: Isoquick Gmbh & Co. Kg
Priority date: 2021-08-17
Filing date: 2022-08-17
Publication date: 2023-02-23

Abstract

The present invention relates a spacer for at least form-lockingly or frictionally connecting an insulating plate to a wall panel. The spacer comprises an anchor portion for form-locking engagement in the insulating plate and at least one connection portion for attaching the spacer to an element connected to the wall panel. In order to provide a spacer for at least form-lockingly or frictionally connecting an insulating plate to a wall panel, the spacer being at least easier or more economical to produce or allowing easier handling, according to the invention the anchor portion consists, at least in parts, of a bent wire which spans a plane.

Description

Spacer for connecting an insulation panel to a wall panel

The present invention relates to a spacer for at least positively or non-positively connecting an insulating panel to a wall panel, the spacer having an anchor section for positive engagement in the insulating panels and at least one connecting section for connecting the spacer to an element connected to the wall panel.

In addition, the present invention relates to a system for thermal insulation of a solid wall of a building with at least one insulating board to be arranged on an outside of the building, at least one wall panel to be arranged on an inside of the building and at least one spacer for at least positive or non-positive connection of the insulating board with the wall disk.

In addition, the present invention also relates to a thermally insulated solid wall and a method for producing such a thermally insulated solid wall of a building.

Thermal insulation composite systems for insulating building exterior walls are known from the prior art. In this case, a plurality of insulation boards is glued onto the finished wall, in particular the finished solid wall made of concrete or masonry stones, or fastened to the wall with dowels. Although such thermal insulation composite systems ensure good thermal insulation of the building, they require a great deal of effort, since the solid wall must first be produced by casting or masonry, to which the individual insulating panels are then applied from the outside. In addition, with this procedure for constructing a building, the inner surface of the wall must be prepared before coating, painting or wallpapering with a further work step, for example by plastering with a fine plaster, in such a way that a smooth substrate is provided. A system for thermal insulation of a solid wall of a building is known from DE 10 2017 101 205 A1. The system includes at least one insulation panel for placement on an exterior of the building, at least one concrete-containing shear wall for placement on an interior of the building, and at least one spacer. The spacer is positively or non-positively connected to the insulating panel and is positively or non-positively connected to the wall panel or an element connected to the wall panel. The spacer is also designed and arranged in such a way that the spacer keeps the insulation panel and the wall panel at a distance from one another, so that fresh concrete can be poured out of an intermediate space between the insulation panel and the wall panel. The connection described there between the outer insulation level and the wall panel on the room side requires several work steps and materials, eg anchor tubes, spacers. In addition, the connection is based on steel wires running horizontally in layers, which are connected to a lattice girder at the level of the interfaces. A further expense arises from the ecologically not always sensible use of styrene-based products. However, these are necessary in order to provide recesses for accommodating the anchor tubes as well as tongue and groove connections.

In contrast, the present invention is based on the object of providing a spacer for at least positively or non-positively connecting an insulating panel to a wall panel, which is at least easier or cheaper to produce or allows easier handling. In addition, a system for thermal insulation of a solid wall of a building with such a spacer, a solid wall of a building with such a system for thermal insulation and a method for producing a thermally insulated solid wall of a building are to be provided.

At least one of the aforementioned objects is achieved according to the invention by a spacer according to independent claim 1. For this purpose, the anchor section of a spacer of the type mentioned at least partially consists of a bent wire that spans a plane.

The basic idea of the present invention is to manufacture the anchor section at least in sections, but in one embodiment completely, from a bent wire, preferably a bent steel wire. This enables the spacer to be manufactured efficiently and cost-effectively. In addition, the insulating boards used with the spacer only have to be slightly adapted compared to conventional insulating boards, so that the effort on the part of the insulating board, ie a component of the system according to the invention, is reduced.

The design of the anchor section from a bent wire, so that this wire spans a plane, makes it possible to connect the anchor section to an insulation board by making a groove in at least one side surface of the insulation board, preferably in all side surfaces of the insulation board, into which the Anchor section is inserted. For this purpose, only a conventional insulating board has to be processed only slightly. The insulation boards used can be cut to the desired length as a continuous product and consist of one or more ecological products. As a result, they are not subject to the otherwise complex and necessary structural shaping, as is known, for example, from the above-mentioned DE 10 2017 101 205 A1.

By simply milling a circumferential groove in each insulation panel, at least two insulation panels are held at a distance from the wall panel in a form-giving and non-positive manner using the spacers according to the invention. The outer insulation level is connected to the inner wall panel or the lattice girder cast in it in a simple manner. In one embodiment, half of the anchor section of the spacer is introduced into the groove of at least two insulating boards at the position specified by the lattice girder. The all-round groove also enables processing of the usually rectangular insulation panels both in a lying (long side horizontal) and standing version (long side vertical).

The spacer according to the invention has the task of absorbing the formwork pressure that occurs during filling in the installed state in such a way that the two formwork panels, namely a wall panel on the one hand and one or more insulating panels on the other, remain at the previously defined distance until the fresh concrete has hardened.

In one embodiment, the spacer according to the invention creates a non-positive and positive spacing between an inner wall panel and an outer wall panel formed from a plurality of insulating boards directly, ie without additional aids. The spacer according to the present invention has significant advantages over the spacer known from DE 10 2017 101 205 A1. The spacer disclosed there can only be arranged at a plurality of predefined positions in the insulating shell. An anchor tube is sunk into a predetermined perforation of the insulating shell. The spacer described in DE 10 2017 101 205 A1 is attached to a horizontally running steel wire, which increases costs. This horizontal steel wire must in turn be attached to the vertical trusses at each level.

In principle, the anchor section according to the invention can assume very different forms. For example, wire can be used to create a rectangular or square structure by bending the wire at appropriate points.

In one embodiment, the wire of the anchor section is bent in a meandering manner. With such a meandering shape of the wire, a structure extending over a larger area can be created. This structure transfers the forces acting on the insulating board when the solid wall is poured between the insulating boards and the wall panel over a large area and directs these forces into the spacer.

In one embodiment of the invention, the wire of the anchor section has a diameter of at least 2.5 mm, preferably at least 3 mm and particularly preferably at least 4 mm.

However, the production of the anchor section at least in sections from wire has the additional advantage that elements made of wire, for example reinforcements, are part of everyday use on construction sites and do not require any special training and handling in their handling.

In one embodiment, two sections of the anchor section extend in two planes that are different from one another, preferably in two planes that are perpendicular to one another. This provides a spacer that can be used in the corners of the building. For this purpose, each of the anchor sections engages in a respective groove of two insulating boards that abut one another during fermentation.

In addition, in one embodiment, the connection section is also made of a wire. In this case, those sections of the spacer that are subject to handling on the construction site are also made of a material commonly used on the construction site. rially manufactured. Bending steel wire is already common practice in the relevant trades. The resulting work steps when assembling on site do not require any special knowledge. Fastening wire elements, tying or bending them is common practice on construction sites anyway.

In one embodiment of the invention, the entire spacer consists entirely of wire, preferably exactly one wire.

The provision of the connecting section also made of wire makes it possible to design the spacer with its anchor section and the at least one connecting section in one piece. The manufacturing process may involve the fabrication of two or more parts, which are then welded together to create a one-piece structure that is further processed at the construction site.

In one embodiment of the invention, the spacer has a first connection section and a second connection section. In a further embodiment, the anchor section extends, preferably in a meandering manner, between the first connection section and the second connection section. In this way, the entire structure of the spacer can be made from a single piece of wire by bending.

In one embodiment, at least the first or the second connecting section has a pre-bent eyelet at its end. Such an eyelet is used to connect the respective connecting section to a lattice girder connected to the wall panel with the aid of a tie wire.

In one embodiment, a piece of wire of the required length is first bent in its middle in such a way that a meandering structure of the anchor section is created. The two remaining straight ends then form the connecting sections and are bent relative to the plane spanned by the anchor section. After the anchor section has been inserted, the connecting sections extend into the groove of the insulating board in the region of the end face of the insulating board and out of it.

In one embodiment of the invention, the at least one connection section extends in a connection section plane that is essentially perpendicular to the plane spanned by the anchor section, the at least one connection section being connected to the anchor section in such a way that the anchor section is on both sides of the connection binding plane extends. In this way, the anchor section can be pushed simultaneously into a respective groove in the abutting side surfaces of two stacked insulation boards. The at least one connecting section then extends between the abutting side surfaces of the insulating boards and into the space between the insulating boards and the wall panel.

In a further embodiment of the invention, the first and the second connection section are each essentially straight sections of a wire.

In one embodiment of the invention, the wire of the at least one connecting section has a substantially straight course, with the at least one connecting section having a preferably wavy structure at its end remote from the anchor section. In such an embodiment, the connecting section can be tied to a belt of a wearer with a tie wire. In this case, it is not necessary to deform the connecting section itself for binding. Instead, the structure of the end of the connecting section facing away from the anchor section increases the friction between the connecting section and the belt, or else the structure forms a certain positive fit with the belt.

In one embodiment of the invention, the first and second connecting sections intersect at a crossing point. The crossing of the two connecting sections at a crossing point makes it possible to connect both connecting sections with the same connection point of the shear wall.

In one embodiment, the first and the second connecting section together form an eye behind the crossing point, viewed from the anchor section. The eyelet can be opened in an overlapping area of the first and second connecting sections, so that the eyelet can be guided around a belt of a wearer and then extends through the eyelet. In one embodiment, an X forms in the connecting section plane perpendicular to the plane spanned by the anchor section, with the legs of the X appearing to be connected to one another on the side facing away from the anchor section, resulting in the eyelet.

In one embodiment, the eyelet can be opened by bending it open a little, like a key ring, when inserting the belt. In one embodiment, the open overlapping area of the eyelet is formed at the crossing point of the first and second connecting sections. In such an embodiment, the crossing point is not welded. In an alternative embodiment, the overlapping area is formed at the free ends of the first and second connecting sections.

In a number of embodiments, the anchor section and the at least one connecting section are designed in one piece, so that both elements of the spacer can be bent from a single wire. Alternatively, however, there are embodiments in which the anchor section and the at least one connecting section are designed in two parts, so that the two parts are connected at the construction site to form the finished spacer with anchor section and connecting section.

In one embodiment of the invention, the anchor section and the connecting section are designed in two parts and can be releasably connected to one another. The connecting section has two holding sections and one connecting section, with the two holding sections extending on one side of the plane spanned by the anchor section and parallel to this plane when the anchor section and the connecting section are in a connected state. The connection section connects the two holding sections to one another and the connection section extends, starting from the two holding sections, to the side of the plane spanned by the anchor section that faces away from the holding sections, so that a pull on the connection section in a direction away from the anchor section is transferred from the holding sections to the anchor section becomes.

In an embodiment in which the anchor section is bent in a periodically meandering manner, the two holding sections each extend over at least two periods of the meandering anchor section.

In one embodiment of the invention, the connection section is essentially U-shaped or V-shaped in a connection section plane, with two legs running towards one another, starting from the holding sections. A distance between the two legs in the plane spanned by the anchor section is selected such that when the holding sections and the limbs are in engagement with the anchor section and when the connecting section plane is essentially perpendicular to the plane spanned by the anchor section, the connecting section plane divides the anchor section into two parts of substantially the same height. The is the height of these two the parts of the anchor section are measured perpendicularly to the connecting section plane, which in turn is perpendicular to the plane spanned by the anchor section.

In one embodiment of the invention, a holding hook is connected to each of the two holding sections of the connecting section at an end remote from the respective leg of the connecting section. When the connecting section plane is essentially perpendicular to the plane spanned by the anchor section, the holding hook is in engagement with the anchor section.

The decisive factor for the function of the spacer is that the spacer is able to absorb the formwork pressure resting on the insulation boards when pouring the solid wall between the insulation boards and the wall panel. In order for the system to be stable, the formwork pressure must be recorded in the same way for each of the insulation panels.

Therefore, in a further embodiment of the invention, the wire of the anchor portion extends from the first connection portion to the second connection portion such that the wire of the anchor portion approaches the first connection portion from a first side relative to the connection portion plane and the wire of the anchor portion approaches the second connection portion from approaches a second side with respect to the link section level.

In one embodiment of the invention, the first connection section and the second connection section extend without the two connection sections crossing over one another. It has been shown that a correspondingly designed spacer is particularly easy for the user to handle.

In one embodiment of the invention, the spacer has a plastic component. Such a plastic component can be, for example, the clip, which is described in one of the exemplary embodiments described below.

In one embodiment of the invention, the spacer is made of plastic. Such a spacer can be produced, for example, by means of an injection molding process or a 3D printing process. The same applies to the plastic components mentioned above.

In one embodiment of the invention, the anchor section extends in a longitudinal direction over a longitudinal width of 160 mm to 240 mm, preferably over a longitudinal width from 180mm to 220mm and more preferably over a longitudinal width of substantially 200mm.

In one embodiment of the invention, the anchor section extends in a transverse direction perpendicular to the longitudinal direction over a transverse width of 60 mm to 140 mm, preferably 80 mm to 120 mm and particularly preferably essentially 100 mm.

In one embodiment of the invention, the spacer has a first and a second connecting section, the first connecting section having a first bracket at its end pointing away from the anchor section or a first eyelet at its end pointing away from the anchor section, the second connecting section at its forward end Anchor portion directed away end has a second bracket or at its end directed away from the anchor portion a second eyelet. A bracket is to be understood, for example, as a wire section bent in a U-shape. This makes it possible to arrange the reinforcement between the first eyelet or the first bracket on the one hand and the second eyelet or the second bracket on the other hand. A form-fitting connection between the reinforcement and the connecting sections can then be brought about by a clamp or alternatively by tying.

The first eyelet or the first bracket is preferably arranged at a distance from the second eyelet or the second bracket, but has a substantially identical distance from the anchor section as the second eyelet or the second bracket. The brackets or the eyelets of the connecting sections are preferably curved outwards, i.e. the center of curvature of the respective bracket or the respective eyelet is arranged outside the space enclosed by the two connecting sections.

According to a preferred variant of this embodiment, the two connecting sections do not intersect.

According to an alternative variant of this embodiment, the two connecting sections intersect. This can bring about additional stabilization of the connection between the insulation panel and the wall panel, since the spacer can then also be placed on the surface of the reinforcement facing the spacer, e.g. the top chord.

In one embodiment of the spacer, the spacer has a clamp, the clamp being designed in such a way that it engages with the first eyelet or the first th bracket and can be brought into engagement with the second eyelet or the second bracket at the same time, the reinforcement and the spacer being designed in such a way that the engagement of the clip with the first eyelet or the first bracket and with the second eyelet or the second bracket brings about the form-fitting connection of the first and second connecting section with the reinforcement. Preferably the clip is a wire having at least two curved sections.

The bracket is a separate component from the connection section and the anchor section, which can be installed by a user in time after the installation of the connection section and the anchor section.

In one embodiment, the clip has at least three curved sections and preferably exactly three curved sections. The clip is preferably designed in such a way that it can be brought into simultaneous engagement with the first eyelet or the first clip and the second eyelet or the second clip solely by elastic bending. This ensures a firm connection and, in conjunction with the reinforcement, a firm attachment of the spacer to the reinforcement if the clip is also engaged with the reinforcement, e.g. a top chord.

At least one of the above objects is also achieved by a system, the system comprising at least one insulation panel for placement on an outside of the building, at least one shear wall for placement on an inside of the building, and at least one spacer according to an embodiment of the invention, such as they have been described above, wherein the anchor section of the at least one spacer is pushed at least in a positive or non-positive manner into a groove in a side surface of the at least one insulating panel, the at least one connecting section being connected in a positive or non-positive manner to an element connected to the wall panel, wherein the spacer is designed and arranged in such a way that the spacer keeps the insulation panel and the wall panel at a distance from one another, so that a gap between the insulation panel and the wall panel can be filled with fresh concrete.

Such a system for thermal insulation of a solid wall provides permanent formwork with at least one insulating panel on the outside of the building and at least one wall panel on the inside of the building.

The spacer according to an embodiment of the present invention, as described above, keeps the insulating board and the wall plate at a distance from one another, so that a gap is created which can be filled with concrete. during the When the gap is filled with fresh concrete, the spacer absorbs the formwork pressure acting on the insulation board. In this way, the insulating boards in particular are prevented from breaking apart while the intermediate space is being filled with fresh concrete.

The solution according to the invention leads to a reduction in assembly times and thus in costs both on the outside of the building and on the inside.

In one embodiment, the wall panel on the inside of the building can already be prefabricated in such a way that it has a surface facing away from the insulation panel, which provides a smooth substrate that is suitable for coating, painting or wallpapering. Therefore, in such an embodiment, there is no need to plaster the wall with fine plaster.

In the state of the art, the inner surface of the wall is usually provided with a fine plaster, which introduces considerable amounts of mixing water into the building. The time-consuming drying involved is not required if a wall panel with a smooth inner surface is used. Visible concrete surfaces, direct painting or wallpapering can be produced at reduced costs. Additional aids are not required.

In one embodiment of the invention, the shear wall is a concrete containing shear wall. However, embodiments are conceivable in which the wall panel consists of or contains other materials, such as wood-based materials.

On the outside of the building, a number of insulation panels form the lost formwork. After filling the gap with fresh concrete, no additional insulating material needs to be applied to the solid wall. The work steps of gluing or dowelling insulation boards to the outside of the solid wall are no longer necessary.

The outer formwork according to the invention is formed by at least one but preferably by a plurality of insulation panels. The insulation boards also take over the insulation of a building and can consist of one or more ecological layers. In one embodiment, the insulation boards are manufactured inexpensively as a continuous product and cut to the desired portioning. Through a circumferential profiling in the form of grooves and/or tongues, it is possible in one embodiment to process the predominantly rectangular insulating boards in a lying and/or standing design.

Half of the anchor section of the spacer is pushed into the grooves of two insulation boards arranged one above the other or next to one another. The formwork pressure that occurs when pouring in the fresh concrete is thus evenly distributed over a larger area, in a stable form, on two insulating boards.

After the gap has been filled with fresh concrete and cured, the insulation board is connected to the wall panel and thus to the solid wall. In addition, the hardened fresh concrete itself forms a certain connection with the insulation board. This already applies to an insulation panel with a smooth, i.e. unprofiled, surface facing the cavity.

The last-mentioned effect can be intensified in that, in one embodiment of the invention, the side of the insulating panel facing the wall panel has a profiled surface made of projections and/or depressions. These cause the insulation panel to be embedded in the fresh concrete to be poured into the space between the wall panel and the insulation panel.

In one embodiment of the invention, the anchor section of the at least one spacer can be accommodated at a plurality of positions in the groove of the insulating board. In this way, the spacer can be positioned freely in or on the respective insulation board.

In one embodiment, the groove in the insulation board is configured to receive the spacer at a plurality of discrete locations.

In an alternative embodiment, the groove is continuous, so that the spacer can be moved freely and accommodated at any position in the groove. In such an embodiment, it is possible to accommodate the spacer in the groove so that it can be displaced relative to the insulating element. This has significant advantages compared to the spacers known from the prior art, which only allow recording on an insulating element at discrete, predefined positions. According to the invention, in this embodiment, the spacer can be accommodated on an insulating panel where after the construction of the insulating panel and the wall panel also on the wall panel corresponding element for connecting to the connecting portion of the spacer is present. The respective anchor section of a spacer can be fixed to the respective insulating board in such a way that the at least one connecting section comes to rest in a position that is the same as the position of the reinforcement protruding from the wall panel.

For the basic idea of the present invention, it is initially irrelevant how the spacer is positively or non-positively connected to the wall panel.

In one embodiment of the invention, however, the element connected to the wall panel is a reinforcement projecting opposite the wall panel into the space between the at least one insulating panel and the wall panel, preferably a lattice girder, with the at least one connecting section being connected to the reinforcement at least in a positive or non-positive manner .

In one embodiment, the wall panel is cast with the reinforcement projecting into the space between the insulating panel and the wall panel. It goes without saying that in such an embodiment the wall panel is in particular a wall panel containing concrete. The spacer is then at least positively or non-positively connected to the sections of the reinforcement that are not cast into the material of the wall panel.

Alternatively, the spacer can be connected to a reinforcement, which in turn is connected, for example via tie wires, to the reinforcement that is partially cast into the material of the wall panel.

In addition, the reinforcement cast into the shear wall and partially protruding from the shear wall also causes the shear wall to be connected to the cast wall section made of fresh concrete between the shear wall and the insulating board. After the fresh concrete has hardened, the wall panel and the wall section made of fresh concrete together form the solid wall. Therefore, in one embodiment of the invention, the wall thickness of the wall section made of fresh concrete is to be dimensioned such that the solid wall formed from the wall panel and the wall section made of fresh concrete carries the required vertical loads.

In one embodiment of the invention, the reinforcement cast with the material of the wall panel is a lattice girder, such as is available, for example, from the company Filigran, D-31633 Lee- se is offered. At least one lower chord of the lattice girder is cast with the material of the shear wall, while the upper chord lies outside the concrete or concrete-containing material of the shear wall and is suitable for connection to further reinforcement or directly to the spacer.

In one embodiment of the invention, the wall panel is cast with a plurality of reinforcements, preferably in the form of lattice girders. In this way, the insulating panels can be connected to the wall panel at various positions using the spacers.

In one embodiment of the invention, the reinforcements are essentially elongate and arranged parallel to one another. The distance between each two adjacent reinforcements is in particular at most 25, preferably at most 30 and particularly preferably at most 45 cm.

The dimensioning of the distance depends in particular not only on static requirements for the wall panel, but also on the stability of the at least one insulation panel with respect to the formwork pressure to be absorbed. It has been shown that excessively large distances between two adjacent reinforcements and thus between two spacers connected to the insulating board lead to a considerable weakening of the stability of the formwork formed by the insulating board.

In one embodiment of the invention, the reinforcements are arranged equidistantly from one another.

In one embodiment of the invention, the reinforcements extend vertically in the finished wall.

In one embodiment of the invention, the reinforcement extends in a direction perpendicular to the connecting section plane of the spacer.

In one embodiment of the invention, the first and second connecting sections are bent around a single reinforcement of the shear wall at their point of intersection.

In one embodiment of the invention, a first and a second reinforcement projecting into the space between the at least one insulating panel and the wall panel are connected to the wall panel, the first connection section being connected to the first and the second connection portion is connected to the second armor. In this way, a single insulation board is connected to two reinforcements by means of a single spacer and attached to the wall panel.

In one embodiment of the invention, the system has first and second insulating boards abutting at their side surfaces, with the anchor section of the spacer extending in a groove in a side surface of the first and second insulating board. The at least one connecting section then extends between the side faces of the first and second insulating board. In one embodiment, the at least one connecting section is pressed into at least one of the side surfaces of the first or second insulation panel.

The construction of the spacer according to the invention, in particular when its connecting sections are also made of wire, makes it possible to leave the insulating boards largely unchanged compared to conventional insulating boards, apart from the groove in the side surfaces. The necessary space for the connecting sections can be created by simply pressing the connecting sections into the side surface, for example by briefly tapping with a hammer.

In one embodiment of the invention, the spacer has a first and a second connecting section, the first connecting section having a first bracket at its end pointing away from the anchor section or a first eyelet at its end pointing away from the anchor section, the second connecting section at its forward end The end pointing away from the anchor section has a second bracket or, at its end pointing away from the anchor section, has a second eyelet, the spacer having a clip, the bracket being designed in such a way that it engages with the first eyelet or the first bracket and at the same time in engagement with the second eyelet or the second bracket can be brought, the reinforcement being arranged between the first eyelet or the first bracket on the one hand and the second eyelet or the second bracket on the other hand, the reinforcement and the spacer being designed in such a way that the engagement of the clip with the first eyelet or The first bracket and the second eyelet or the second bracket bring about the form-fitting connection of the first and second connecting sections to the reinforcement. The clamp can preferably be brought into engagement with an upper chord of the reinforcement, wherein the clamp in the connected state rests on a surface of the upper chord facing away from the anchor section and at the same time engages behind the first bracket or the first eyelet and the second bracket or the second eyelet. In one embodiment of the invention, the insulation board has a fiber insulation material, preferably exclusively fiber insulation material.

In one embodiment of the invention, the insulating board has polystyrene.

In addition, at least one of the above objects is also achieved by a solid wall of a building with a thermal insulation system as described above in embodiments thereof and with a solid wall section made of fresh concrete, the space between the insulating panel and the wall panel being filled with the den Solid wall section forming fresh concrete is poured, solved

At least one of the aforementioned objects is also achieved by a method for producing a thermally insulated solid wall of a building, the method having the steps: erecting at least one wall panel on an inside of the building, erecting at least one insulating board on an outside of the building and shaping and /or non-positive connection of an element connected to the wall panel to the insulation panel by means of an embodiment of a spacer as described above, the spacer holding the insulation panel and the wall panel at a defined distance from one another, and pouring out an element formed between the insulation panel and the wall panel gap with fresh concrete so that the solid wall is formed.

Further advantages, features and application possibilities of the present invention become clear from the following description of embodiments and the associated figures. In the figures, the same elements are denoted by the same reference symbols.

Figure 1 is an isometric view of a spacer according to a first embodiment of the present invention.

Figure 2 is an isometric view, partially broken away, of the spacer of Figure 1 with an insulation board as viewed from the outside of the building.

Figure 3 is a partially broken away view of the spacer of Figures 1 and 2 as viewed from the inside of the building. FIG. 4 is a schematic view from the side of the system according to the invention made up of an insulating panel, a wall panel and a spacer.

Figure 5 is an isometric view, partially broken away, of an alternative embodiment of the spacer of the present invention as viewed from the outside of the building.

Figure 6 is an isometric view of a spacer according to another embodiment of the present invention.

Figure 7 is an isometric view of the spacer of Figure 6 when installed.

Figure 8 is a plan view of the anchor portion of a spacer according to another embodiment.

Figure 9 is a side view of the spacer of Figure 8.

Figure 10 is an isometric view of a spacer according to another

embodiment of the invention.

Figure 11 is a schematic isometric view of a spacer according to another two-part embodiment of the present invention.

Figure 12 is a schematic top plan view of the spacer of Figure 11.

Figure 13 is a schematic isometric view of yet another two part

Embodiment of the spacer.

Figure 14 is a schematic isometric view of the connecting portion of the spacer of Figure 13.

Figure 15 is a schematic side view of the anchor portion of the spacer of Figures 11 and 12 and the spacer of Figures 13 and 14. Figure 16 is a schematic top plan view of another embodiment of the spacer of the present invention.

FIG. 17 is a schematic perspective and partially transparent view of a further embodiment of the spacer according to the invention, including a clamp.

Figure 18 is a schematic and partially transparent top plan view of the embodiment of Figure 17 when the spacer is connected to the top chord of a reinforcement.

The spacers 1 described below are used to keep insulation panels 2 in a system for thermal insulation of a solid wall of a building at a distance from a wall panel on an inside of the building. The spacers 1 absorb the formwork pressure acting on the insulating panel 2 when the space between the wall panel and the insulating panel is grouted and transfer it to the wall panel.

Such a system for thermal insulation of a solid wall of a building is shown schematically in a sectional view of FIG. The system includes a wall panel 14 made of concrete and a plurality of insulating panels 2 as permanent formwork for creating a solid wall made of freshly cast concrete. The concrete wall 14 is placed on the inside of the building and initially supported with sprouts and aligned vertically in order to absorb the formwork pressure during the pouring of the fresh concrete. The wall panel 14 has a smooth surface 15 pointing into the building, which no longer has to be plastered. Opposite the wall panel 14, insulating panels 2 are stacked in the manner of a masonry bond.

The insulating panels 2 not only form the second half of the lost formwork, but also insulate the outside of the building. The intermediate space 16 formed between the wall panel 14 and the insulating panels 2 will expire with fresh concrete after the formwork has been made. The formwork 2, 14 together with the solid wall section made of fresh concrete in the intermediate space 16 then forms the solid wall of the building, including the thermal insulation, in the sense of the present invention. Fresh concrete and upper chords on the one hand, and the inner wall panel with the lower chords on the other hand, absorb the vertical loads occurring in the wall as a whole after the fresh concrete has hardened. It is crucial for the function of the wall panel 14 and the insulating panels 2 as formwork that they have an unchangeable spacing during the casting of the solid wall section made of concrete and are also able to withstand the formwork pressure that occurs during filling. For this purpose, the insulating boards 2 and the wall plate 14 are connected to one another by means of spacers denoted by reference number 1 . The illustration of the spacer 1 in Figure 4 represents a simplified schematic diagram.

In order to be able to connect the spacer to the wall panel 14 in such a way that the spacer 1 can transmit tensile forces between the two formwork elements 2, 14, several lattice girders 17 are cast into the wall panel 14 as reinforcement. However, the respective lattice girder 17 is only cast with its lower chord 18 with the wall plate 14 . The upper chord 19, on the other hand, protrudes into the space 16 between the wall panel 14 and the insulating panel 2.

In the illustrated embodiments, the lattice girders 17 run essentially vertically. In this way, spacers 1 can be connected to the respective truss 17 in arbitrarily selected vertical positions. The horizontal position of the respective lattice girder 17 can be achieved by moving the respective spacer 1 in a groove in the insulating elements 2 .

So that the spacer 1 can fulfill this task, the spacer 1 has an anchor section 3 and two connecting sections 4 , 9 . In the illustrated embodiments, the spacer consists of steel wire 5, all of the spacers 1 according to Figures 1 to 6 being made in one piece, but not necessarily made from a single piece of wire. In the embodiments shown, the steel wire has a diameter of 4 mm.

In the area of the anchor section 3, the steel wire 5 is bent in a meandering shape, with the steel wire spanning a plane. In the illustrated embodiment, the plane is defined by the location of the wires and coincides with the side wall surface 6 of a groove 11 in the side surface 6 of the insulation panel 2 as seen in Figures 2 and 5.

In the embodiment of Figures 1 to 3, the anchor section 3 has three upper and three lower bends, so that the wire, starting from a transition point 7 between the first connecting section 4 and the anchor section 3, runs through three complete oscillations before the anchor section reaches the transition point 8 in the second binding section 9 transitions. The number of oscillations can be increased or decreased as required, for example as shown in FIG.

The first and the second connecting section 4 , 9 lie essentially in a connecting section plane which is perpendicular to the plane 6 spanned by the anchor section 3 . This plane of the connecting section essentially coincides with the side surface 10 of the insulating board 2, as is shown in FIGS.

The groove 11 is milled into the side surface 10 of the insulating board. In the illustrated embodiment, the lower half of the anchor section 3, i.e. below the transition points 7, 8, is inserted into this groove 11 of the insulating board 2. Forces acting on the insulating panel 6, in particular the formwork pressure when filling the space between a wall panel and the insulating panel 2, are transferred from the insulating panel to the anchor section 3 and from there to the first and second connecting sections 4, 9.

However, the anchor section 3 also engages in a groove of an insulating board 2 which is placed on the side face 10 of the insulating board 2 . The wire 5 of the anchor portion 3 approaches the transition point 7 and thus the first connecting portion 4 from above and the transition point 8 and thus the second connecting portion 9 from below. In this way, the introduction of force from the insulation boards 2 abutting on their side surfaces is optimal for both the upper and the lower insulation board 2 . Thus, the formwork pressure that occurs when filling with fresh concrete is evenly distributed to the adjacent upper and lower insulation boards.

FIG. 5 shows an alternative embodiment of the spacer 1 according to the invention. The embodiment in FIG. 5 differs from the embodiment in FIGS. 1 to 3 in that the spacer 1 is welded together from two steel wire sections, the weld point being provided with reference number 12 in the embodiment in the figure.

The two embodiments of FIGS. 1-3 on the one hand and 5 on the other hand are designed in such a way that the connecting sections 4 , 9 intersect at a crossing point 13 . The connecting sections 4, 9 crossing one another in front of the lattice girder result in a stable fixing to the respective lattice girder. Through the crossing connecting sections 4, 9, both connecting sections 4, 9 can be connected to the same chord of a single lattice girder cast into the wall panel. The connection of the spacer 1 with the crossed ends of the connecting sections 4, 9 is done by simply bending jamming or tying up with a tie wire. Such work steps are familiar to the craftsmen working on the building site. Fastening as described above is common practice. It does not require any special knowledge.

In contrast, the embodiment of FIG. 6 does not have first and second connecting sections 4, 9 which intersect but point away from one another. These are intended to be connected to first and second chords of two different trusses in the wall panel, as shown schematically in Figure 7. The connection to the upper chords takes place in a manner similar to that described above for the embodiment according to FIG.

Figures 8 and 9 show another embodiment of the spacer 1. This is intended for reinforcement at exposed locations. In this embodiment, too, the anchor section is formed by a bent steel wire 5, the steel wire describing a circle lying in one plane. However, this spacer 1 has only a single connection section 4, via which the anchor section 3 can be connected to the top chord of a lattice girder.

FIG. 10 shows a schematic, partially broken away view of a further embodiment of the spacer 1. This embodiment of the spacer 1 is characterized in that two sections of the anchor section 3 extend in two planes which are essentially perpendicular to one another. This spacer is used in the corners of the building to connect two insulating panels 2 that abut one another during fermentation with one or two lattice girders of two wall panels that also abut one another at 90°.

In this embodiment, the connecting sections 4, 9 have pre-bent eyelets 20 at their ends. These eyelets 20 are used to connect the connecting sections 4, 9 to the upper flanges of two lattice girders of two abutting wall panels with the aid of tie wires. In this way, it is prevented that the insulating shells encountered in a corner formation drift apart when they are filled with fresh concrete. It goes without saying that such eyelets 20 can also be provided for connection to the other embodiments shown here.

FIGS. 11 and 12 show a two-part embodiment of the spacer 1 according to the invention, the anchor section 3 and the connecting section 4 being formed from two separate parts which can be connected to one another in a detachable manner. Such an execution form has the advantage that it allows for reduced assembly work on the construction site. FIGS. 11 and 12 show the spacer 1 in an assembled state, in which the anchor section 3 and the connecting section 4 are detachably connected to one another. FIG. 15, on the other hand, shows the anchor section 3 in isolation, as it is used in the embodiments of FIGS. 11 and 12 on the one hand and 13 and 14 on the other hand.

The interaction of the two parts of the spacer, namely the anchor section 3 and the connecting section 4 in the two-part form, becomes clear from the synopsis of FIGS. 11 and 12. 12 shows a plan view of the spacer 1 from above, i.e. in a view rotated by approximately 90° compared with the view from FIG.

This variant makes it possible to first connect the connecting section 4 to the upper chord 19 of a lattice girder 17, then to place the connecting section 4 on a peripheral side surface 10 of an insulating board 2 and only then to press the anchor section 3 into the groove 11 in the insulating board. By pressing the anchor section 3 into the insulating board 2 , not only is the anchor section 3 connected to the insulating board 2 , but also the connecting section 4 is fixed relative to the anchor section 3 and thus to the insulating board 2 .

The connecting section 4 has two holding sections 21 and a connection section 22 connecting these two holding sections 21 . The anchor section 3 spans a plane that essentially corresponds to the paper plane of the illustration from FIG. The holding portions 21 are arranged on a first side of this plane. The attachment section 22 connecting the holding sections 21 reaches through the anchor section 3 to the other side of this plane spanned by the anchor section. Figure 12 shows the arrangement of this spacer element 1 in the so-called connecting section plane, i.e. in the plane in which the connecting section 4 extends. In the mounted state, this connecting section plane is essentially perpendicular to the plane spanned by the anchor section.

The connection section 22 serves to connect the connection section 4 to an upper chord 19 of a carrier 17. A pull of the anchor section 1 in a direction away from the upper chord 19 initiates this train via the holding sections 21 and the connection section 22 in the upper chord 19.

The connection section 22 comprises two legs 23, 24 which extend essentially straight from one end of each holding section 21. These legs 23, 24 grip fen through the spanned by the anchor section 1 plane. Starting from the holding sections 21, the two legs 23, 24 run towards one another, so that in the top view from FIG. The two legs 23, 24 intersect at the crossing point 13, the two legs 23, 24 being welded to one another at the crossing point 13.

Starting from the point of intersection 13 , the two legs 23 , 24 are then shaped in the form of an eyelet 25 , the two legs 23 , 24 having an overlapping region 26 . In this overlapping area 26, the two legs 23, 24 are in contact with one another, but are not connected to one another in a form-fitting or material-locking manner.

By slightly, elastically bending open the eyelet 25 in the overlapping area 26, the upper belt 19 can be inserted into the eyelet 25 during assembly. For this purpose, the eyelet 25 is first aligned in such a way that it extends essentially parallel to the upper chord 19, then the upper chord 19 is threaded through the overlapping area 26 into the eyelet 25 and finally the connecting section 4 is rotated by 90° so that it is as shown in Figure 12 takes position.

In contrast, FIGS. 13 and 14 show an embodiment in which the two legs 23, 24 of the connection section 22 do not cross. The legs therefore run essentially in a V-shape. At the base of the V-shape, the legs 23, 24 are again bent over to form an open eyelet 26, so that at this point the connection section 22 can be tied to an armouring with a wire.

In the configurations of the spacer 1 from FIGS. 11 and 12 as well as 13 and 14, a retaining hook 27 is connected to each of the retaining sections 21 at its end remote from the connection section 22. This retaining hook 27 is in turn engaged with a part of the anchor section 3 . The selection of the distances between the sections of the connecting section 4, which reach through the plane spanned by the anchor section 3, determine the position in which the anchor section 3 is fixed on the connecting section 4 when the anchor section 3 is pressed into the groove 11 of the insulating board 2. For the interaction of the anchor section 3 and the connecting section 4, it is therefore important in this embodiment that the meanders of the anchor section 3 on the one hand and the distances between the legs 23, 24 of the connection section 22 and the distances between the legs 23, 24 and the retaining hooks 27 on the other hand, are coordinated. In the illustrated embodiments, these distances are dimensioned such that when the legs 23, 24 and the retaining hook 27 come into simultaneous contact with the anchor section 3, the plane of the connecting section divides the anchor section 3 into two essentially equally high parts, measured perpendicularly to the plane of the connecting section.

FIG. 16 shows an embodiment of the spacer 1 as shown in FIGS. 6 and 7, the connecting sections 4 , 9 each having a wave-shaped structure 29 at their end 28 facing away from the anchor section 3 . In this way, the ends 28 form a form fit with the respective top chord 19 of the lattice girder 17 when the connecting sections 4 , 9 are tied to the top chord 19 .

FIGS. 17 and 18 now show a further embodiment of the spacer 1. In this case too, the anchor section 3 and the first and second connecting sections 4, 9 are formed in one piece from a steel wire 5. FIG. Alternatively, these sections could also be formed from a plastic. The first connecting section 4 extends from a first longitudinal end of the anchor section 3 in a direction perpendicular to the plane of the anchor section 3 . The second connecting section 9 also extends from the second longitudinal end of the anchor section 3 in a direction perpendicular to the plane of the anchor section 3 . The two connecting sections 4, 9 form a V-shaped arrangement, with the connecting sections 4, 9 not crossing. Rather, a continuous gap is left open between the two ends of the connecting sections 4, 9 facing away from the anchor section 3. However, the invention also includes otherwise corresponding embodiments in which the connecting sections 4, 9 intersect.

The respective ends of the two connecting sections 4, 9 facing away from the anchor section 3 are curved outwards and thereby each form a bracket, and thus a first bracket 30 and a second bracket 31. Between these two brackets 30, 31 is during the installation of the system for thermal insulation, the upper chord 19 of a reinforcement of the wall panel 14 is arranged and then the clip 32 is placed around the upper chord on the side of the upper chord 19 facing away from the anchor section 3 and brought into engagement with the first bracket 30 and the second bracket 31 in each case. 18 in particular clearly shows that the clamp 32 rests against the surface of the upper chord 19 facing away from the anchor side 3 or at least only allows a small amount of play of a few millimeters so that the insulating board 2 and Shear wall 14 is largely prevented when filling the gap 16 with fresh concrete.

The clip 32, which is also decisive for the connection of the insulating board 2 and the wall disk 14, is a partially elastically deformable wire. Alternatively, a partially elastically deformable plastic component can also be used. The clamp 32 has a bracket at each of its ends, which can be brought into a positive and/or frictional connection with the bracket 30 or 31 of the respective connecting section in order to fix the spacer 1 in relation to the reinforcement. A further curved section is provided between the two brackets of the clip, which is designed to encompass the upper chord 19 .

The view in Figure 17 is partially transparent. The groove 11 is indicated by two parallel lines. However, the insulating panel 2 is shown as a transparent object, and the wall panel 14 in which the lattice girder 17 is embedded in concrete is also shown as transparent.

With respect to the anchor portion, Figure 18 shows a plan view in which the viewer is looking along the transverse direction of the anchor portion and consequently can only perceive the longitudinal extent of the anchor portion.

For the purposes of the original disclosure, it is pointed out that all the features that are apparent to a person skilled in the art from the present description, the drawings and the claims, even if they were specifically only described in connection with certain other features, both individually and in any combinations can be combined with other features or groups of features disclosed here, unless this has been expressly excluded or technical circumstances make such combinations impossible or pointless. The comprehensive, explicit representation of all conceivable feature combinations is omitted here only for the sake of brevity and legibility of the description.

While the invention has been shown and described in detail in the drawings and the foregoing description, this illustration and description is by way of example only and is not intended to limit the scope as defined by the claims. The invention is not limited to the disclosed embodiments. Modifications to the disclosed embodiments will become apparent to those skilled in the art from the drawings, the specification, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain features are claimed in different claims does not exclude their combination Reference signs in the claims are not intended to limit the scope.

Reference List

1 spacer

2 insulation panel

3 anchor section

4, 9 connecting section

5 steel wire

6 side wall surface of the groove 11

7, 8 transition point

10 side surface of the insulation board 2

11 slots

12 weld

13 crossing point

14 wall panel

15 inner surface of the shear wall

16 space

17 lattice girders

18 bottom chord

19 upper belt

20 eyelet

21 holding section

22 connection section

23, 24 legs of the connection section

25 eyelet

26 overlap area

27 retaining hooks

28 End of connecting section 4, 9

29 wavy structure

30 first bracket

31 second bracket

32 bracket

Claims

Patent claims Spacer (1) for at least positive or non-positive connection of an insulating panel (2) to a wall panel (14), the spacer (1) having an anchor section (3) for positive engagement in the insulating panel (2) and at least has a connecting section (4, 9) for connecting the spacer (1) to an element connected to the wall panel (14), characterized in that the anchor section (3) consists at least in sections of a bent wire (5) which spans a plane . Spacer (1) according to the preceding claim, wherein the wire (5) of the anchor section (3) is bent in a meandering manner. Spacer (1) according to one of the preceding claims, wherein the at least one connecting section (4, 9) consists of a wire (5). Spacer (1) according to one of the preceding claims, wherein the anchor section (3) and the at least one connecting section (4, 9) are formed in one piece. Spacer (1) according to one of the preceding claims, wherein the spacer (1) has a first and a second connecting section (4, 9). Spacer (1) according to the preceding claim, wherein the first and the second connecting section (4, 9) intersect at a crossing point (13). Spacer (1) according to the preceding claim, wherein the first and the second connecting section (4, 9) form an eyelet (25) behind the crossing point (13), viewed from the anchor section (3), the eyelet (25) in one Overlapping area (26) of the first and second connecting sections (4, 9) can be opened, so that the eyelet (25) can be guided around a belt (19) of a carrier (17).

8. Spacer (1) according to any one of claims 5 to 7, wherein the anchor portion (3) between the first connecting portion (4) and the second connecting portion (9), preferably meandering, extends.

9. Spacer (1) according to one of the preceding claims as far as dependent on claim 3, wherein the at least one connecting section (4, 9) has a substantially straight course and wherein the at least one connecting section (4, 9) at its anchor section (3 ) Averted end (28) has a, preferably wavy, structure (29).

10. Spacer (1) according to one of Claims 2, 3 and 5 to 9 when dependent on Claim 2, wherein the anchor section (3) and the connecting section (4) are designed in two parts and can be releasably connected to one another, the connecting section (4) having two Holding sections (21) and a connecting section (22), wherein when the anchor section (3) and the connecting section (4) are in a connected state, the two holding sections (21) are on one side of the plane spanned by the anchor section (3) and parallel to extend in this plane and wherein the connection section (22) connects the two holding sections (21) to one another and, starting from the two holding sections (21), extends to the side of the plane spanned by the anchor section (3) that is remote from the holding sections (21), so that a train on the connection section (22) in a direction away from the anchor section (3) is transferred from the holding sections (21) to the anchor section (3). i.e.

11. Spacer (1) according to the preceding claim, wherein the connection section (22) in a connection section plane is essentially U-shaped or V-shaped with two legs (23, 24) running towards one another starting from the holding sections (21), wherein a distance between the two legs (23, 24) in the plane spanned by the anchor section (3) is selected such that when the holding sections (21) and the legs (23, 24) are in engagement with the anchor section (3) and if the plane of the connecting section is essentially perpendicular to the plane spanned by the anchor section (3), the plane of the connecting section divides the anchor section (3) into two parts of essentially the same height.

12. Spacer (1) according to the preceding claim, wherein a retaining hook (27) is connected to each of the two retaining sections (21) at an end remote from the respective leg (23, 24) of the connecting section (22) and wherein, if the Connection section plane is substantially perpendicular to the plane spanned by the anchor section (3), the holding hook (27) is in engagement with the anchor section (3).

13. Spacer (1) according to one of the preceding claims, wherein the at least one connecting section (4, 9) extends in a connecting section plane (10) substantially perpendicular to the plane (6) spanned by the anchor section (3), and wherein the at least one connecting section (4, 9) is connected to the anchor section (3) in such a way that the anchor section (3) extends on both sides of the plane (10) of the connecting section.

14. Spacer (1) according to the preceding claim when dependent on claim 3, wherein the wire (5) of the anchor section (3) extends from the first connection section (4, 9) to the second connection section (4, 9) so that the wire (5) of the anchor section () approaches the first connection section (4, 9) from a first side with respect to the connection section plane (10) and the wire (5) of the anchor section () approaches the second connection section (4, 9) from approaches a second side with respect to the joint section plane (10).

15. System for thermal insulation of a solid wall of a building with at least one insulating board (2) for arranging on an outside of the building, at least one wall panel (14) for arranging on an inside of the building and at least one spacer (1) according to one of the preceding claims, wherein the anchor section (3) of the at least one spacer (1) is inserted at least in a positive or non-positive manner into a groove (11) in a side surface (10) of the at least one insulating panel (2), wherein the at least one connecting section (4, 9) is positively or non-positively connected to an element connected to the wall panel (14), the spacer (1) being designed and arranged in such a way that the spacer (1), the insulating panel (2) and the wall panel (14) stood apart from each other, so that an intermediate space (16) between the insulating panel (2) and the wall panel (14) can be poured with fresh concrete. System according to claim 15, wherein the element connected to the wall panel (14) is a reinforcement, preferably a lattice girder, which projects opposite the wall panel (14) into the intermediate space (16) between the at least one insulating panel (2) and the wall panel (14). , wherein the at least one connecting section (4, 9) is positively connected to the reinforcement. A system as claimed in claim 16 when dependent on claim 6, wherein the first and second connecting portions (4,9) are bent around a single armouring at their crossing point (13). System according to Claim 15 insofar as it is dependent on Claim 5, wherein a first and a second reinforcement projecting into the intermediate space () between the at least one insulating panel (2) and the wall panel (14) are connected to the wall panel (14), the first connection section (4) is connected to the first reinforcement and the second connecting portion (9) is connected to the second reinforcement. A system according to any one of claims 15 to 18 or 25, wherein the armor extends in a direction perpendicular to the plane of the joint section (10). System according to one of claims 15 to 19 or 25, wherein the system has first and second insulating panels (2) abutting with their side surfaces, the anchor section (3) of the spacer (1) being located in a groove (11) of the first and the second insulating board (2), so that the at least one connecting section (4, 9) extends between the side surfaces (10) of the first and second insulating board (2), the at least one connecting section (4, 9) extending into at least one of the Side surfaces (10) is pressed. Solid wall of a building with a thermal insulation system according to one of Claims 15 to 20 or 25 and with a solid wall section made of fresh concrete, the intermediate space (16) between the insulating panel (2) and the wall panel (14) being filled with the fresh concrete forming the solid wall section . Method for producing a thermally insulated solid wall of a building with the steps:

Erection of at least one wall panel on an inside of the building, erection of at least one insulating panel (2) on an outside of the building, at least positive or non-positive connection of an element connected to the wall panel to the insulating panel (2) by means of a spacer according to one of Claims 1 to 14, wherein the spacer (1) holds the insulating panel (2) and the wall panel at a defined distance from one another, and

Pouring a gap formed between the insulation panel and the wall panel with fresh concrete, so that the solid wall is formed. Spacer according to one of Claims 1 to 6, the spacer (1) having a first and a second connecting section (4, 9), the first connecting section (4) having a first bracket (30) or a first eyelet (20), wherein the second connecting section (9) has a second bracket (31) or a second eyelet (20) at its end directed away from the anchor section. Spacer according to Claim 23, wherein the spacer (1) has a clip (32), the clip (32) being designed in such a way that it engages with the first eyelet (20) or the first bracket (30) and at the same time in Can be brought into engagement with the second eyelet (20) or the second bracket (31), the clip (32) preferably being a wire with at least two curved sections. System according to claim 16, wherein the spacer (1) is designed according to claim 24, the reinforcement at least in sections between the first eyelet (20) or the first bracket (30) on the one hand and the second eyelet (20) or the second bracket (31) is arranged on the other hand, wherein the reinforcement and the spacer are designed such that the engagement of the clip with the first eyelet (20) or the first bracket (30) and with the second Eyelet (20) or the second bracket (31) brings about the positive connection of the first and second connecting section (4, 9) with the reinforcement.