The invention relates to a connection piece for the angular connection of two components to one another, in particular for a drywall or metal lightweight construction, wherein two studs, preferably U-stud-shaped studs, to be arranged essentially at right angles to one another, are to be connected to one another, characterised in that the connection piece comprises a bottom plate and a stud-shaped, preferably U-stud- shaped, sidewall, which is fitted essentially vertically on the bottom plate, and wherein at least one cutout, in particular for the feed-through in each case of a fastening element, preferably a concrete anchor, is present on each side of the bottom plate divided by the sidewall.

Furthermore, the application relates to a fixing kit and a drywall or metal lightweight construction, which contains at least one such connection piece, as well as an assembly kit for such a drywall or metal lightweight construction.

A connection piece of the aforementioned generic class is known for example from DE 20 2017 002 584 U1.

DE 20 2017 002 584 U1 deals with the problem that, especially in the case of so-called "half-walls", such as for example balustrades, parapets, banisters or suchlike, the upper edge is free and not anchored, so that its construction can more easily become unstable. In DE 20 2017 002 584 U1 , this problem is solved by the fact that angle brackets are folded in one piece from the angle cheeks there and an insertion piece (angle reinforcement element) is placed on the angle brackets, in such a way that it extends transversely to the angle backs from one angle cheek to the other angle cheek. The angle plate (and also the insertion piece) has to be fastened here with two fastening means in the sub-surface, often concrete, so as to guarantee sufficient stability, especially in the case of parapets. The fastening means must however have a certain spacing from one another, because when for example concrete anchors or also anchor bolts/screw bolts are used for this, which splay out in the sub-surface, the latter can have a mutually negative influence on one another and thus reduce the bearing capacity.

For this reason, the aforementioned solution to the problem is only possible for relatively wide stud widths (for example from a stud width of 100 mm). Often, however, it is desirable, especially in the case of parapets for example, to use narrow stud widths in dry or metal lightweight construction with a consistent stability and a given economic efficiency, which not only comply with aesthetic requirements, but also are desirable with regard to the enlarged living and/or floor area. A conceivable solution with smaller fastening means, which would then also require a smaller spacing from one another, c

cannot be implemented, since the latter are then also accompanied by reduced stability. Consequently, there has hitherto been no solution in the prior art to this problem.

The problem underlying the invention, therefore, is to find an improved solution for the construction of so-called "half-walls", such as for example balustrades, parapets, banisters or suchlike, wherein narrow stud widths with a consistent stability and a given economic efficiency can be used, which not only meet aesthetic requirements, but are also desirable with regard to the enlargement in living and/or floor area.

This problem according to the invention is solved by a connection piece for the angular connection of two components to one another, in particular for a drywall or metal lightweight construction, wherein two studs, preferably U-stud-shaped studs, to be arranged essentially at right angles to one another, are to be connected to one another, characterised in that the connection piece comprises a bottom plate and a stud-shaped, preferably U-stud-shaped, sidewall, which is fitted essentially vertically on the bottom plate, and wherein at least one cutout, in particular for the feed-through in each case of a fastening element, preferably a concrete anchor, is present on each side of the bottom plate divided by the sidewall.

The invention enables a high degree of fixing of in particular cold-formed, thin-walled studs in solid bearing components, such as for example steel girders, reinforced concrete ceilings and suchlike, and can contribute to the solution for raised line loads, as well as impact loads. The connection piece according to the invention can thus advantageously be used for example for the suspension of linear constructions such as aprons on ceilings or also as parapets on the ground.

As a result of the produced one-sided fixing of the studs, the bearing capacity of the overall construction is increased (for example with respect to the absorption of transverse forces, in particular forces which have a component which is directed through the area gripped by the components connected to one another or in their surface normal direction), leads to the solution to the strain due to line loads and impact loads according to relevant standards (DIN 4103-1 , June 2015, and DIN EN 1991-1-1/NA, December 2010) and meets the architectural and aesthetic requirements through a slender design.

Although the connection piece can be used advantageously especially in the case of projecting constructions anchored at one side, the connection piece can also be used in the case of metal studs, preferably U-shaped studs, mounted on two sides, wherein in both cases the loads are also reliably conveyed into the bearing sub-structures. Also advantageous with respect to the prior art is the fact that in the assembly solely the connection piece according to the invention with corresponding fastening and/or anchoring means can be used and no further components have to be introduced, as a result of which assembly errors and assembly time can be minimized.

Within the meaning of the present application, a bottom plate is a flat, rectangular piece of metal, which can for example have a thickness of 5 to 10 mm, preferably at least 6 mm. A sidewall, on the other hand, within the meaning of the present application, is stud-shaped, preferably U-stud shaped, and can for example have a thickness of 2 to 8 mm, preferably 3 mm. U-stud-shaped within the meaning of the application means that the sidewall is formed corresponding to a U-stud, i.e. has two flanges or legs and a web or also base surface, on which the two flanges sit. U-studs are known to the person skilled in the art. Further, as well UW studs and UA studs are known to the person skilled in the art: UW studs usually are U studs (studs which have a cross section essentially in the shape of an U) for use in a wall, while UA studs usually are U studs which have a higher stiffness (due to thicker material) and which comprise several cutouts in their web, e.g. for the feed-through of fastening elements. Preferably, all studs according to the present invention consist of metal, preferably steel.

Cutouts within the meaning of the application can be holes, the latter can for example be round holes, they can however also be elongated holes for example.

Fastening elements within the meaning of the application differ, depending on where and for what they are used. In order to carry out a fastening in a solid component, for example concrete, concrete anchors or screw bolts for example are a sensible option. Concrete anchors for example can comprise an anchoring element, which is introduced into a drilled hole of a solid component, and a nut, which anchors the anchoring element in the solid component by being screwed up tight. In order for example to fix two metal parts or metal plates to one another, carriage bolts for example can be used, insofar as the metal parts have a cutout at the corresponding points. If there is no cutout present there, self-tapping screws can be driven through the two metal parts (up to a certain thickness of the metal parts, the latter being dependent on the corresponding selftapping screw, which however is known to the person skilled in the art). All these fastening means and their corresponding applications are known to the person skilled in the art.

In an advantageous embodiment, the web of the stud-shaped, preferably U stud- shaped, sidewall can occupy the entire width of the bottom plate and the flanges of the stud-shaped, preferably U-stud-shaped, sidewall can terminate flush at the two longitudinal sides of the bottom plate. Moreover, the web of the stud-shaped, preferably U-stud-shaped, sidewall can comprise at least two, preferably at least four cutouts, in particular for the feed-through in each case of a fastening element, wherein preferably at least two cutouts, particularly preferably four cutouts, can be constituted as elongated holes.

Furthermore, it is advantageous that the stud-shaped, preferably U-stud-shaped, sidewall of the connection piece can be dimensioned such that the outer sides of the web and of the two flanges of the stud-shaped, preferably U-stud-shaped, sidewall of the connection piece can be made to abut essentially over the full area against the inner sides the web and of the two flanges of a stud, preferably of a stud with at least two cutouts, in particular for the feed-through of in each case a fastening element, particularly preferably of a UA stud. The expression "made to abut over the full area" within the meaning of the application means that the two U-stud-shaped parts make contact at as many points of their surface as possible, but not necessarily all, when made to abut over the full area. Due to unevennesses, which can arise for example in the forming of the metal part, or contamination, it is not always possible for the metal parts to make contact at all points of their surface, but nonetheless be brought completely into contact within the meaning of the invention.

Moreover, it is advantageous that the at least two cutouts of the web of the stud-shaped, preferably U-stud-shaped, sidewall can correspond such to at least two cutouts of the web of a stud, preferably a stud with at least two cutouts in the web, in particular for the feed-through of in each case a fastening element, particularly preferably a UA stud, that the sidewall and the stud are connectable by at least two fastening elements, preferably carriage bolts.

"Correspond" within the meaning of this application is to be understood such that the corresponding cutouts lie above one another, in such a way that in this case the sidewall and the stud can be connected to one another by fastening elements, here for example carriage bolts or self-drilling screws.

Moreover, it is advantageous that the flanges of the stud-shaped, preferably U-stud- shaped, sidewall and the flanges of a stud, preferably a stud with at least two cutouts in the web, in particular for the feed-through in each case of a fastening element, particularly preferably a UA stud, can be suitable with a full-area abutment for connection by fastening elements, preferably self-drilling screws.

In a preferred embodiment, the length of the bottom plate of the connection piece is dimensioned such that a plurality of connection pieces can fit longitudinally into a stud, preferably in a UW stud, without overlapping and/or without the minimum spacing of the fastening means, preferably concrete anchors, being undercut. The length of the bottom plate of the connection piece preferably amounts to at least 110 mm, preferably to at least 1 14 mm, at most 200 mm, particularly preferably 120 mm. A variant is also theoretically conceivable, wherein a bottom plate is used in the length of the stud, preferably of the UW stud, with sidewalls fastened on the latter at the appropriate distances. It would however be at the loss of flexibility at the place of use, if for example an offset is present in the corresponding half-wall.

Moreover, it is advantageous that the bottom plate can be welded to the stud-shaped, preferably U-stud-shaped, sidewall. Particular stability and durability of the connection piece is thus guaranteed.

A further advantage is that the web of the stud-shaped, preferably U-stud-shaped, sidewall can be fitted on the surface of the bottom plate in such a way that it essentially halves the latter. This advantageously leads to a uniform distribution of the forces. Moreover, it is advantageous that the at least one cutout, in particular for the feed- through of a fastening element, preferably a concrete anchor, can lie on each side of the bottom plate divided by the sidewall either in the middle of the bottom plate with respect to its width or at the edge of the bottom plate with respect to its width.

"Edge of the bottom plate" is understood within the meaning of the invention to mean that the corresponding cutout can sit as close as possible to the edge of the longitudinal side of the bottom plate, without an instability of the bottom plate resulting due to lack of material thickness between the cutout and the edge of the bottom plate. With bottom plates within the meaning of the application, a minimum material thickness of 7 mm is still stable. This can be calculated on the basis of relevant standards (DIN EN 1993-1-8, December 2012), so that, for example with a concrete anchor of 10 mm diameter, a spacing from the end of the bottom plate of 12 mm, measured from the centre-point to the cutout, is still stable. The stability with regard to the effect of forces can thus be increased further from the corresponding opposite side.

The advantage when the at least one cutout is located in the middle of the bottom plate in terms of its width is that the corresponding construction can be executed at the smallest possible distance from for example ceiling edges, since the fastening means, preferably concrete anchors, do not as in the prior art necessarily have to be located at the edges of the bottom plate, but can be located centrally. The construction can thus be brought closer to the ceiling corner, without the mode of action of the fastening means, preferably the concrete anchor, being reduced or the solid component, for example the concrete, being damaged, and so further living and/or floor area can be generated. Furthermore, it is advantageous that the distance of the cutout in the bottom plate can be located so far from the sidewall that access can conveniently be gained with the necessary tools.

It is particularly advantageous that the connection piece for the assembly and reinforcement especially of balustrades, parapets, banisters or suchlike constructions can be provided with at least one free edge that is capable of being acted upon by force.

The connection piece according to the invention can also particularly advantageously be assembled and provided together with a range of suitable fastening means, for example carriage screws, concrete anchors and self-drilling screws, as a marketable fixing kit.

Independent protection is also claimed in each case for a drywall or metal lightweight construction, wherein two studs, preferably U-stud-shaped studs, to be arranged essentially at right angles to one another, are to be connected to one another, especially for the formation of balustrades, parapets, banisters or suchlike constructions with at least one free edge that is capable of being acted upon by force, which is characterised according to the invention by at least one connection piece according to the invention, as well as for an assembly kit for such a drywall or metal lightweight construction.

A further development can preferably be provided such that the two stud elements to be connected together are U-stud-shaped studs, into which the connection piece can be insertable to form an angular connection, in such a way that the flanges extend essentially plane-parallel to the U-stud flanges of the two U-stud-shaped studs, preferably abutting at least with one or two of them.

A method for erecting a drywall or metal lightweight construction, in particular a parapet or apron, can comprise the following steps: - Alignment of a stud, preferably a UW stud, on a bearing solid component,

- fixing of the stud, for example by means of screws,

- positioning of at least one connection piece according to the invention, preferably at regular distances, in the stud in such a way that the bottom plate of the connection piece lies over its full area on the web of the stud,

- fastening of the at least one connection piece according to the invention with fastening elements, preferably concrete anchors, provided for the purpose,

- positioning of a stud, preferably a stud with at least two cutouts in the web, in particular for the feed-through of in each case a fastening element, particularly preferably in a UA stud, on the connection piece in such a way that the web and the two flanges of the connection piece can be made to abut essentially over the full area against the web and the two flanges of the stud,

- fastening of the web of the stud to the web of the connection piece with at least two fastening means, preferably with at least two carriage bolts,

- fastening of the flanges of the stud to the flanges of the sidewall of the connection piece, preferably with at least one self-tapping screw per flange.

Examples of embodiment, from which further innovative features can also emerge, but which are in principle only to be regarded as by way of example and which are not intended to limit that the subject-matter of the invention and its scope of protection are represented in the figures. In the figures:

Fig. 1 shows a perspective view of the connection piece according to the invention and

Fig. 2 shows a perspective view of the connection piece according to the invention according to fig. 1 in a functional assembly.

Fig- 1 shows a perspective view of the connection piece (1 ) according to the invention.

The connection piece (1) according to the invention comprises a bottom plate (2) and an essentially U-stud-shaped sidewall (3), which is fitted essentially centrally on the bottom plate (2), so that the web (4) of the sidewall (3) and the bottom plate (2) in fig. 1 produce a T-shape standing upside down. The sidewall (3) is welded to the bottom plate (2) at three locations, i.e. to the web (4) and to the two flanges or U-stud legs (5). Two of the three weld seams (6) can be seen in fig. 1. Both the sidewall and also the bottom plate can each be connected to a component, for example a stud, in order thus to connect components to one another that are abutting against one another at an angle. For this purpose, the bottom plate (2) and the sidewall (3) each comprise cutouts, which are constituted as round holes (7) or elongated holes (8). On account of the perspective representation, only two of the four elongated holes (8) present can be seen, the other two being covered by the flange (5). The cutout (9) is produced from the production process, but an embodiment without this cutout is also conceivable. Fig. 2 shows a perspective view of the connection piece (1 ) according to the invention according to fig. 1 in a functional assembly, in which it connects two components (10) and (11). Identical components are denoted with the same reference numbers as in fig. 1.

The shown components are each constituted as U-studs with webs (12) and (13) and flanges or U-stud legs (14) and (15), wherein component (10) is constituted here as a UW stud and component (11 ) as a UA stud. The dimensions of the sidewall (3) of the connection piece (1 ) and of the components (10) and (11) are selected such that the components (10) and (11) and the connection piece (1) can abut over the full area at their intersections.

Concrete anchors (16) for fastening in the solid component (not shown) are located in the round holes (7) of the bottom plate (2), whereas the sidewall (3) of the connection piece (1 ) is connected via two carriage bolts (17) to the UA stud, which comprises corresponding cutouts in the form of round holes (7) and elongated holes (8).

Furthermore, the flanges of the connection piece and the flanges of the UA stud are connected by self-drilling screws (18). No cutouts are required for this.

It can also be seen in fig. 2 that the connection piece (1 ) is introduced into the components (10) and (11) to be connected, essentially not visible from the outside and

"disappears". A relevant advantage of the connection piece according to the invention can also exist herein.

Component 10 displays no cutouts in the represented example of embodiment in fig. 2 (in contrast with the cutouts (7) and (8) in component 11 , which can be used for the connection to the connection piece (1 )). This can mean, but neither has to be the case nor to mean, that component 10 is a fundamental basic carrier of a wall construction on a floor or a building ceiling as a foundation, on and with which the connection piece (1) is anchored to this foundation. The arrangement according to the invention can in fact also be used at another point and in a different orientation and a different installation situation.

Geometrical terms such as orthogonal or T-shaped and also the information on magnitudes of for example lengths and widths are to be understood within the meaning of this application as essentially orthogonal or T-shaped. Smaller deviations, such as can be tolerated in the production, processing and use of such materials, are also included under these terms.