EP2933397B1 - Connecting profile and prefabricated building plate for use in drywall - Google Patents

Description

The invention relates to a prefabricated building element for the realization of room corners in drywall and a zughöriges connection profile, wherein two structural panels of the prefabricated building element from the plane to the rear are hinged.
In drywall, in particular in the production of walls and front walls, for example, plasterboard, a cost-effective and particularly rapid implementation of construction work is generally required. In contrast, in such wall structures made of individual building panels, the problem of the butt joints between the building panels. In particular, room corners lead to a non-negligible reworking work, for example, a trowelling of corner rails. From this point of view, the cladding of shafts, columns or the like is associated with a particularly high amount of time.
To rationalize various solutions for connecting the abutting corner panels are known from the prior art, in which a subsequent filling is unnecessary. Known For this purpose, on the one hand bendable plastic profiles, which have on both sides of a bending section U-shaped mounting portions for attachment of the end faces of the adjacent structural panels. Thus, in a simple and reliable way, the design can be realized on the edge of adjacent building panels, without the need for spackling the corner.

A disadvantage of such an embodiment, however, is that the correspondingly used profile at the corner of the end faces of the two adjacent building panels is visible across. However, deviating from the structural panels surface property of the visible profile in the corner considerably complicates the subsequent decoration of the building panels.

Another disadvantage is the not completely flat design of the building board provided with the profile, as this overlaps on the front and back of the adjacent building panels. Thus, a plurality of profile panels connected by profile can not be stacked to save space. To prevent damage to one another superimposed construction panels, in particular their outer layers, by the overarching profiles it requires the individual handling of the corresponding prefabricated component, which significantly increases the logistical effort.

Furthermore, a solution is known from the prior art, in which a recess is incorporated in a continuous building board, so that the arranged on the visible side cover layer is maintained. In this recess, a double-sided adhesive tape is inserted, wherein after flaps of the both sides of the recess existing construction panel sections by means of the double-sided adhesive tape in the corner a renewed connection of the two building board sections is created.

A disadvantage of the latter embodiment, however, is the lack of stability of the provided with a recess building board, despite the use the double-sided adhesive tape. This can lead to damage in the handling of the building board before it is installed at the place of use. In this case, on the one hand, the cover layer can tear in the region of the recess in the event of uneven lifting. Furthermore, it can come by lifting on a Bauplattenabschnitt to detach the top layer from Bauplattenkern. Not to be neglected is the risk of an impermissible breaking out of the construction board core adjacent to the recess. In particular, with plasterboard occurs almost inevitably an irregularly shaped breaking off the bottom of the recess towards tapered gypsum core. These damages either lead to the total loss of the building board or require at least a rework and thus an undesirable expenditure of time.

From the DE 31 41 709 A1 a prefabricated building element made of plasterboard with connecting profile for the formation of corner-shaped wall elements is known. The connection profile is anchored with an anchor web in the gypsum material of the plasterboard.

A disadvantage of this prefabricated component is that the connection profile must be inserted already in the manufacture of the plasterboard, since the anchor bar is embedded in the still flowable plaster mass. The preparation of such prefabricated components therefore requires a very large plant engineering effort and can not be made on demand also in smaller quantities.

From the WO 98/16699 A1 For example, a connection profile for connecting panel elements with two protrusions is known. A projection is thereby inserted into a central groove of the panel element, whereas the second projection engages over the Panelement at a corner of the end faces and thereby fixes the connection profile positively.

A disadvantage of this connection profile is that the connection profile overlaps the panel element on the cover side. Thus, a plurality of connected by means of the connection profile panel elements not stacked on top of each other to save space. In addition, the unevenness caused by the overlapping second tab must be over-lapped to form a flat exterior.

Object of the present invention is therefore to provide a connection profile and a finished component with a corresponding connection profile available, which overcomes the disadvantages of the previous versions in the field of plasterboard.

The stated object is achieved by an inventive prefabricated component according to the teaching of claim 1. An inventive connection profile is specified in claim 8. Furthermore, a new method according to the invention for producing a corresponding prefabricated component is specified in claim 12.

Advantageous embodiments are the subject of the dependent claims.

The generic finished component is initially used for the realization of room corners in drywall. For this purpose, it first requires a building board, which has a arranged on the visible side continuous cover layer and behind the cover layer facing a rear plate core. Furthermore, it is necessary that in the building board a behind the cover layer facing the back, is incorporated over the length of the building panel extending recess, ie, the plate core is divided by the recess. Accordingly, the required building board is divided into a right building panel section and a left building board section in continuous cover layer. The continuous cover layer in the region of the recess in this case forms a bending zone, which allows a folding of the right building board section relative to the left building board section at least towards the rear over an angle of at least 90 °. Thus, starting from a flat building board a room corner can be realized.

Furthermore, the prefabricated component comprises a right stabilizer bar for attachment to the right structural plate section and a left stabilizer bar for attachment to the left structural plate section, wherein the stabilizer bars are arranged within the recess. It is obvious that, taking into account the shape and size of the recess, the stabilizer bar must be shaped such that unimpeded flaps of Bauplattenabschnitte back is possible.

To improve the stability and stability over the prior art, the respective structural panel sections are provided with an insertion groove extending from the recess and extending parallel to the respective structural panel section. For this purpose, the stabilizing strips each have a Einsteckschenkel, which is secured in the insertion of the respective Bauplattenabschnitts.

By attaching the stabilizing strips by means of an insertion groove and a Einsteckschenkels a significantly improved connection between the stabilizing bar is achieved with the Bauplattenabschnitt, without the need for gripping the front sides of the structural panel section. Due to the newly created embodiment, a much better hold of the stabilizing strips is achieved on the structural panel sections, wherein in addition the rigidity and stability of the arrangement of structural panel and stabilizing strips can be increased over known designs. This in turn reduces the risk of damage to the plate core and the cover layer in the region of the recess.

A particularly advantageous prefabricated component is created when a plasterboard is used as a building board, in which embodiment the corresponding cover layer is formed by a paper layer.

Particularly advantageous is the execution of the finished component, when the stabilizer bars are completely disposed within the recess. That in the extended starting position, the stabilizing strips have a height which is less than the thickness of the intended building board less the thickness of the cover layer. Thus, the stabilizing strips between the cover layer and the back of the building board can be arranged, whereby a particularly advantageous and damage-free transportability of the finished component is achieved. Contrary to known designs with the structural panels embracing stiffening profile, the finished component can be layered without the risk of damage to each other.

The shape and the preparation of the stabilizing strips further simplified if they are designed substantially symmetrical to each other. This simplifies in particular the design of the recess in the building board as well as the insertion grooves in the building board sections. In a separate embodiment of the two stabilizing strips, in contrast, it is particularly advantageous if the right and left stabilizing strips are designed as identical parts.

An advantageous assembly as well as an advantageous usability of the finished component is achieved when the building board sections are mutually hinged at an angle of at least 170 ° to the visible side. As a result, the two insertion grooves of the respective structural panel sections come to lie largely parallel to one another. In this mounting position, the stabilizing strips can be attached to a prepared building board by inserting the Einsteckschenkel in the Einstecknuten in a simple manner.

An advantageous connection between the stabilizing strips and the structural panel sections is achieved when the insertion grooves have a depth between 10 mm and 50 mm, with a depth between 20 mm and 30 mm being particularly advantageously selected.

It is particularly advantageous if the Einsteckschenkel not in the bottom of the insertion come to rest, but rather a free space remains. However, this should be chosen as small as possible in order not to cause unnecessary weakening of Bauplattenabschnitte. Therefore, it is advantageous if between the Einsteckschenkel and the bottom of the Einstecknut a distance between 0.5 mm and 10 mm, particularly advantageously between 1.5 mm and 4 mm, is given.

It is particularly advantageous if the stabilizing strips are extended by a latching function. Here, the right stabilizer bar right latching means and the left stabilizer left latching means, the embodiment of the latching means is initially insignificant, provided that it is ensured that when folding the building panel sections by 90 ° to the back latching the right latching means with the left latching means ,

This particularly advantageous embodiment with a latching function ensures that at the place of use, starting from the planar shape of the finished component a structural panel section can be folded so that the 90 ° angled shape of the finished component results, then no further adherence to the preservation of this angled shape is required. Now, the finished component can be easily attached to the place of use, the angle is already held automatically due to the locking.

The realization of the locking means can in this case take place in various ways, wherein in a first particularly advantageous embodiment of the stabilizing strips - particularly advantageously produced as extruded profiles or as a common extruded - the right locking means by means of a locking lug engages behind the left locking means (where right and left are chosen purely arbitrarily). Thus, the stabilizer bars together with the locking means in the extruded profile without additional rework can be produced and are therefore particularly cost feasible.

Alternatively, it is possible to perform the locking means of the left side and right side similar, which engage behind each other. Conceivable here is an embodiment similar to a zipper, so that when the fastening sections are folded by 90 ° to the rear, hooking of the locking means to one another is effected.

With regard to the realizable locking force, it is also particularly advantageous if it is not too high. Rather, it is particularly advantageous if a disengagement occurs before a critical breaking load is reached. If unfavorable handling is performed on the prefabricated component after locking, however, it is advantageous if disengagement takes place. If, for example, only one structural panel section is detected and in the other structural panel section, bending forces occur, for example, in a horizontal position under its own weight, then these bending forces can quickly lead to breakage of the structural panel section, in particular in the case of a plasterboard panel. Particularly at risk in this case is the area directly at the insertion groove. In contrast, it is advantageous if, instead, a disengagement takes place, so that although not held Bauplattenabschnitt immediately abruptly drops, but there is a realistic possibility that in a free swinging down in the air damage due to the disengagement is prevented.

For the realization of the stabilizer bars, various options are available, wherein in a first variant for the right stabilizer bar and the left stabilizer bar items can be used.

In contrast, the stabilizer bars can be realized in a particularly advantageous manner by an inventive connection profile.

The one-piece connection profile initially has, generically, a right stabilizer bar for attachment to a right-hand structural panel section and a left stabilizer bar for attachment to a left-hand structural panel section, the stabilizer bars being fastened as intended in the recess of the structural panel.

To improve on the prior art, the respective stabilizing strips are extended by a Einsteckschenkel, by means of which a significantly improved connection with the respective Bauplattenabschnitt is achieved without the need for gripping the front sides of the structural panels sections. In this case, the Einsteckschenkel extends parallel to the plane of the respective Bauplattenabschnitts, wherein correspondingly in the respective Bauplattenabschnitt an outgoing of the recess insertion groove is required, which must extend parallel to the corresponding plane of the corresponding Bauplattenabschnitts.

A corresponding connection profile can be used in a particularly advantageous manner in a prefabricated component as described above.

In this case, it is furthermore particularly advantageous if the connection profile comprises a central bending section connecting the stabilizing strips. Thus, flaps of the structural panel sections with attached stabilizer bars are made possible by bending the top layer of the structural panel and the bending section.

If, in the realization of the corner of the room as sharp as possible Eckgestaltung is desired, it is also of particular advantage, if a bending of the connecting profile on the bending section with the smallest possible radius. Therefore, it is particularly advantageous if the bending section is more or less a film hinge, so that a nearly sharp-edged corner is realized when the connection profile is bent through 90 ° to the rear. Likewise, this allows one largely resistance-free bending of the two stabilizing strips to each other both to the rear and to the visible side. A further advantage of this embodiment is that the covering layer of the finished component passing through on the visible side is stretched only slightly by the folding of the two building board sections.

A simple as well as suitable design of the connection profile for realizing a bend of the right stabilizer bar relative to the left stabilizer bar by 90 ° to the back is achieved when the connection profile in the initial state has a V-shaped from the bending section to the back opening shape. Furthermore, it is advantageous if the connection profile has on both sides of the bending section a substantially triangular-shaped base section and a plate-shaped web section following thereon. Thus, the connection profile without viewing the Einsteckschenkel in the starting position is Y-shaped, whereby it can be inserted into a corresponding Y-shaped recess in the building board. This shape favors on the one hand the processing of the building board for the production of the recess. However, a particular advantage is the avoidance of damage to the building board sections in the region of the recess. Likewise, when used as a plasterboard, the use of a connecting profile with a Y-shaped design proves to be particularly advantageous, since thus breaking out of the core layer in the region of the recess is largely avoided.

As stated above, it is as well as for the finished component for the connection profile particularly advantageous if the right stabilizer bar right latching means and the left stabilizer left latching means, wherein at a flaps of the stabilizing bars by 90 ° to the back latching the right latching means with the left locking means takes place.

The novel prefabricated component further leads to a novel method according to the invention for producing a prefabricated component for the realization of room corners in dry construction.

For this purpose, it first requires a building board, which has a arranged on the visible side continuous cover layer and a behind the cover layer facing a back plate core. Furthermore, a connection profile with a right and a left stabilizer bar or separate stabilizer bars are needed, each having a Einsteckschenkel.

First, a processing of the building board is required, in which the plate core is severed to the top layer in a straight line over the length of the building board. In a first type of process, this can be done by a separating cut through the plate core, or in a second type of process to form a plate-core removing V- or Y-shaped recess. In any case, a right and a left adjacent to the recess part plate is formed, wherein the two partial plates remain connected to each other by the continuous cover layer of the building board.

Now, a folding of the partial plates in the region of the separating section or in the region of the recess to the visible side to their contact with each other is required. Thus, the front sides of the two partial plates are no longer arranged opposite each other, but are located side by side with intermediate cover layer.

In the first type of process with the separating cut a processing of the two partial plates is now required, in which a chamfer on the front side is generated. This is to be carried out such that at an imaginary level position of the sub-panels a V or Y-shaped recess is formed.

Subsequently, the processing of the two partial plates with the generation of a parallel to the plane of the partial plate extending, emanating from the recess insertion groove is required. As a result, a right and a left construction panel section is formed.

Now, the installation of the right and left stabilizer bar on the right and on the left part of the construction panel takes place to form a finished component according to the description above.

If a connection profile is used in a particularly advantageous manner, which integrally has a central bending section, in the particularly advantageous method, the connection profile is folded to the visible side before mounting on the building board sections, so that the Einsteckschenkel are arranged parallel to each other. Thus, both Einsteckschenkel the connection profile can be inserted simultaneously into the two Einstecknuten the two structural panels sections.

Furthermore, it is to increase the rigidity and strength of particular advantage if adhesive is applied prior to assembly of the Einsteckschenkel in the Einstecknuten on the Einsteckschenkeln and / or in the Einstecknuten.

In order to prevent damage to the sub-plates during their processing, it is advantageous if, in the production of the insertion grooves, both sub-plates bear against a planar support together in the region of the machining tool. In this case, it is advantageous to carry out the support with a length of at least 50 mm, particularly advantageously of at least 200 mm, and at a height of at least 120% of the depth of the insertion grooves, particularly advantageously of at least 200% of the depth of the insertion grooves.

In the following figures, various exemplary embodiments for connection profiles and for prefabricated components are outlined.

Fig. 1

eine einfache Ausführungsform eines erfindungsgemäßen Verbindungsprofils;

Fig. 2

ein Fertigbauelement unter Verwendung des Verbindungsprofils aus Fig. 1;

Fig. 3

die zu verwendende Bauplatte des Fertigbauelements aus Fig. 2;

Fig. 4

das Fertigbauelement nach Klappen der beiden Befestigungsabschnitte zur Rückseite hin;

Fig. 5

die Montage des Verbindungsprofils an der Bauplatte;

Fig. 6

eine erste alternative Ausführungsform eines Verbindungsprofils mit Rastfunktion;

Fig. 7

ein Fertigbauelement unter Verwendung des Verbindungsprofils aus Fig. 6 in geklappter Stellung;

Fig. 8

eine zweite alternative Ausführungsform eines Verbindungsprofils mit Rastfunktion;

Fig. 9

ein Fertigbauelement unter Verwendung des Verbindungsprofils aus Fig. 8 in geklappter Stellung;

Fig. 10

getrennte Stabilisierungsleisten zur Verwendung bei einem Fertigbauelement;

Fig. 11

ein weiteres Beispiel für ein Fertigbauelement mit den Stabilisierungsleisten aus Fig. 10.

Show it:

Fig. 1

a simple embodiment of a connection profile according to the invention;

Fig. 2

a prefabricated element using the connection profile Fig. 1 ;

Fig. 3

the building board to be used of the finished component from Fig. 2 ;

Fig. 4

the finished component after flaps of the two attachment portions to the back;

Fig. 5

the mounting of the connection profile on the building board;

Fig. 6

a first alternative embodiment of a connection profile with locking function;

Fig. 7

a prefabricated element using the connection profile Fig. 6 in folded position;

Fig. 8

a second alternative embodiment of a connection profile with locking function;

Fig. 9

a prefabricated element using the connection profile Fig. 8 in folded position;

Fig. 10

separate stabilizer bars for use with a finished component;

Fig. 11

another example of a prefabricated component with the stabilizing strips Fig. 10 ,

In the FIG. 1 a simple embodiment of a connection profile 01 is sketched in cross section, with this with a Y-shaped basic shape divides into a right stabilizer bar 04r and a left stabilizer bar 041, which 04r, 041 are connected to each other via a bending portion 03. Here, the bending portion 03 is selected to be so thin that this 03 realizes a film hinge, based on which 03, the two stabilizing strips 04r, 041 are mutually bendable. The V-shaped opening towards the rear of the connection profile 01 ensures that the two stabilizing strips 04r, 041 are bendable towards each other by 90 ° towards the rear. The design of the stabilizing strips 04, which are each composed of a triangular base section 05, a plate-shaped web section 06 adjoining thereto 05 and a plug-in limb 07, which extends essentially parallel to the plane of the respective building board section 16, can also be seen.

In the FIG. 2 is a finished component 11 with the connection profile 01 from Fig. 1 sketched, with the associated building board 15 in the FIG. 3 is pictured. Evident is the advantageous embodiment of the building board 15 with the Y-shaped recess 18, adjacent to the 18 two building board sections 16r and 161, which in turn are connected via a continuous arranged on the visible side 12 cover layer 17. In the respective building panel sections 16r, 161 161 Einstecknuten 19 are incorporated parallel to the plane of the respective Hauplattenabschnitte, in which 19 the Einsteckschenkel 07 of the connection profile 01 are attached. Thus, a particularly stable connection of the connection profile 01 with the building board 15 is achieved.

Furthermore, the Fig. 2 can be seen that the connection profile 01 is completely within the recess 18 in this particularly advantageous design and does not protrude beyond the back 13 of the building board 15. Thus, unhindered layers of a plurality of structural panels 15 or a plurality of prefabricated structural elements 11 are possible on each other, without a risk of damage from the overlying cover layers of other building panels threatens.

In the FIG. 4 Now the finished component 11 is sketched in its use position, for which purpose the two structural panels 16r, 161 of the building panel 15 are folded over by an angle of 90 ° to the rear side 13 out. Accordingly, the two web portions 06 of the right stabilizer bar 04r and the left stabilizer bar 041 come to rest in parallel. Furthermore, it can be seen the advantageous corner design of the finished component in the folded position by 90 °, which is due to the bending region 03 in the manner of a film hinge largely acute-angled. Furthermore, it can be seen from this embodiment that in use a uniform surface is created circumferentially around the corner, so that the subsequent surface design can be made without reworking or additional effort.

The introduction of the connection profile 01 into the building board 15 comprising the two building board sections 16r and 161 is particularly simple if the connection profile 01 and the building board 15 are each folded through 180 ° to the visible side 12 towards each other (see FIG. 5 ). By folding down the right stabilizer bar 04r and the left stabilizer bar 041 to the visible side by 180 °, the two Einsteckschenkel 07 parallel to each other to lie. Likewise, the two structural plate sections 16r and 161 can be bent by 180 ° to each other to the visible side, so that their Einstecknuten 19 are also aligned parallel to each other to the front side open. In this position, the assembly of the connection profile 01 is readily possible on the thus prepared building board 15.

In the FIG. 6 is an alternative to execution Fig. 1 sketched a connection profile 21 with locking function, which 21 as well as the profile Fig. 1 can be produced by extrusion. To realize the locking function now has a stabilizer bar 24r a first locking means 29r in the form of a latching hook. The other stabilizer bar 241, however, forms with the free end face of the regularly present web section 06, a second latching means 291, which 291 can be engaged behind by the latching hook 29r.

This outlines the FIG. 7 the execution of the connection profile 21 Fig. 6 folded in use in a prefabricated component 31 in the functional position by 90 ° to the back 13. In this position, the position of the two structural plate sections 16r, 161 is reliably held relative to one another. It can also be seen that, for this embodiment, the detent function requires a slight further recess in the associated building board 35.

In the FIG. 8 an alternative connection profile 41 is sketched with locking function, now the right stabilizer bar 44r and the left stabilizer bar 441 are constructed similar, with each undercut changing grid surveys 49r and 491 quasi zipper hooked into each other and thus also secure the position of the two stabilizing bars 44r, 441 to each other.

This outlines the FIG. 9 the connection profile Fig. 8 in its use in a folded back by 90 ° to the building panel 55 of the finished component 51st

In the FIG. 10 now separate stabilizer bars 64 are outlined, which 64 are executed for the right side and the left side as equal parts. These 64 are each composed of a web portion 06 and a Einsteckschenkel 07 together.

This outlines the FIG. 11 a prefabricated component 71 with the separate stabilizing strips 64 corresponding to the previous figure. The folding of the right structural plate section 76r relative to the left structural plate section 761 takes place at the cover layer 77 passing through in the region of the recess 78. For larger plate thicknesses of the structural plate 75, this is it is possible to limit the machining in the region of the recess 78 to the region in which the stabilizing strips 64 are attached, so that a shoulder 79 is formed on the building board sections 76 towards the rear above the stabilizing strips 64.

Claims (11)

1. A prefabricated building element (11, 31, 51, 71) for constructing corners in rooms in dry walling using a building panel (15, 35, 75) made of gypsum board, said building panel (15, 35, 75) having a continuous surface layer (17, 77) arranged on the visible side (12) and a recess (18, 78) behind the surface layer (17, 77), said recess (18, 78) pointing toward a rear side (13), as well as a right and a left building panel section (16r, 76r, 161, 761) adjacent to the recess (18, 78), said building panel sections (16r, 76r, 161, 761) being able to be folded relative to each other at an angle of at least 90° at least toward the rear side (13), and having a right and a left stabilizing strip (04r, 041, 24r, 241, 44r, 441, 64), said stabilizing strips (04, 24, 44, 64) being mounted within the recess (18, 78) at the right or left building panel section (16r, 76r, 161, 761), respectively,
   characterized in that
   insertion grooves (19) starting from the recess (18, 78) are incorporated in the building panel sections (16r, 76r, 161, 761) parallel to the respective plane of the building panel section (16r, 76r, 161, 761), wherein the stabilizing strips (04, 24, 44, 64) each comprise an insertion tongue (07) which is mounted in the insertion groove (19) of the respective building panel section (16, 76).
2. The prefabricated building element (11, 31, 51, 71) according to claim 1,
   characterized in that
   the building panel (15, 35, 75) is a gypsum board.
3. The prefabricated building element (11, 31, 51, 71) according to claim 1 or 2,
   characterized in that
   the stabilizing strips (04, 24, 44, 64) are arranged at the building panel (15, 35, 75) within the recess (18, 78) between the surface layer (17, 77) and the rear side (13).
4. The prefabricated building element (11, 31, 51, 71) according to any one of the claims 1 to 3,
   characterized in that
   the right stabilizing strip (04r, 24r, 44r) is designed symmetrical to the left stabilizing strip (041, 241, 441); and/or the right stabilizing strip (64) and the left stabilizing strip (64) are designed as non-variable parts.
5. The prefabricated building element (11, 31, 51, 71) according to any one of the claims 1 to 4,
   characterized in that
   the building panel sections (16r, 76r, 161, 761) are able to be folded relative to each other toward the visible side (12) at an angle of at least 170°, in particular with the building panel sections (16r, 76r, 161, 761) abutting each other.
6. The prefabricated building element (11, 31, 51, 71) according to any one of the claims 1 to 5,
   characterized in that
   the insertion groove (19) has a depth of between 10 mm and 50 mm, in particular between 20 mm and 30 mm, wherein in particular the distance between the insertion tongue (07) and the base of the insertion groove (19) is between 0.5 mm and 10 mm.
7. The prefabricated building element (11, 31, 51, 71) according to any one of the claims 1 to 5,
   characterized in that
   the right stabilizing strip (24r, 44r, 64r) has right latching means (29r, 49r, 69) and the left stabilizing strip (241, 441, 64) has left latching means (291, 491, 69), wherein the right latching means (29r, 49r, 69) latch with the left latching means (291, 491, 69) when the building panel sections (16r, 76r, 161, 761) are folded by 90° towards the rear side (13), wherein in particular said latching means (29r, 291, 49r, 491, 69), with respect to the generated retaining force, are designed such that said latching means (29r, 291, 49r, 491, 69) unlatch before the building panel (15, 35, 75) is damaged through breakage at and/or beside the stabilizing strip (04, 24, 44, 64).
8. A method for producing a prefabricated building element (11, 31, 51, 71) for constructing corners in rooms in dry walling using a building panel made of gypsum board, said building panel having a continuous surface layer (17, 77) arranged on the visible side (12) and a panel core behind the surface layer (17, 77) pointing toward a rear side (13), and having a right and a left stabilizing strip (04r, 041, 24r, 241, 44r, 441, 64), said stabilizing strips (04, 24, 44, 64) each comprising an insertion tongue (07),
   comprising the steps:

   - processing and producing the building panel with a straight separating cut separating the panel core up to the surface layer (17, 77) or with a straight V- or Y-shaped recess (18, 78) penetrating the panel core up to the surface layer (17, 77), wherein a right and a left partial panel adjacent to the recess (18, 78) are formed;

   - folding the partial panels toward the visible side (12) until they abut each other;

   - in the case of the separating cut, processing the two partial panels by producing a tapering which forms a V- or Y-shaped recess (18, 78) when the partial panels are in a planar arrangement;

   - processing the two partial panels by producing an insertion groove (19) running parallel to the plane of the partial panel and starting from the recess (18, 78) when forming a right or a left building panel section (16r, 76r, 161, 761), respectively;

   - mounting the right and the left stabilizing strip (04r, 041, 24r, 241, 44r, 441, 64) to the right or the left building panel section (16r, 76r, 161, 761), respectively, when producing a prefabricated building element (11, 31, 51, 71) according to any one of the preceding claims.
9. The method according to claim 8,
   characterized in that
   a connecting profile (01, 21, 41) according to any one of the preceding claims is used, wherein said connecting profile (01, 21, 41) is also folded toward the visible side (12) before being mounted to the building panel sections (16r, 76r, 161, 761) so that the insertion tongues (07) of the stabilizing strips (04r, 041, 24r, 241, 44r, 441) are arranged parallel to each other.
10. The method according to claim 8 or 9,
    characterized in that
    adhesive is applied to the insertion tongues (07) and/or into the insertion grooves (19) before the insertion tongues (07) are mounted in the insertion grooves (19).
11. The method according to any one of the claims 8 to 10,
    characterized in that
    both partial panels together rest against a planar support in the area of the processing tool when the insertion grooves (19) are produced.

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