Butt joint for joining two hollow profiles

Abstract

The present invention relates to a butt connector (120, 122) for joining two hollow profiles (102, 112), wherein the butt connector comprises: a housing with a first side wall (150) and an opposing second side wall (152); a filling channel (146) for filling with adhesives and / or sealants, wherein the filling channel extends in the longitudinal direction of the housing, between the side walls (150, 152); and a first transverse opening (148) which extends through the first side wall (150) into the filling channel (146).

Description

[0001] The present invention relates to butt connectors for joining two hollow profiles, in particular hollow profiles for window or door frames.

[0002] Thermally insulated aluminum frames typically consist of two hollow aluminum profiles, also known as half-shells, connected by one or more insulating webs but thermally separated. To create a T-shaped butt joint between two hollow aluminum profiles, as is the case in T-junctions, it is known to provide one butt connector for each hollow chamber of the aluminum profile. The butt connectors are screwed, for example, to the first hollow profile of the T-junction. The second hollow profile is then slid onto the corner connectors with its hollow chambers and secured, for example, with tension pins, so that the two hollow profiles are connected perpendicularly.

[0003] To further improve the connection between the second hollow profile and the butt connector and to achieve a seal at the joint, it is also known to introduce adhesive into the hollow profiles through the butt connector. DE 101 15 330 C1 and DE 10 2015 007 804 B3 relate to a butt connector for joining two hollow profiles.

[0004] A butt connector known from the prior art can be found in DE 10 2018 116 721 A1. This document discloses butt connectors with lateral recesses that serve as distribution channels (8, 9) for the adhesive. Such lateral distribution channels, which run longitudinally along the butt connector, are generally very complex and expensive to manufacture. Long distribution channels for transporting the adhesive or sealant to the respective surfaces can lead to the adhesive migrating into areas where it is not needed. Furthermore, the long distribution channels (8, 9) require a large quantity of adhesive or sealant to achieve the necessary bond strength or the required seal of the hollow profiles.

[0005] Based on the above-mentioned problem, the present invention aims to provide a novel butt connector which is simple and inexpensive to manufacture and at the same time limits the use of the adhesive to the relevant areas of the hollow profiles.

[0006] According to the invention, the aforementioned problem is solved by the subject matter of independent claim 1. Advantageous embodiments of the butt connector are specified in the dependent claims.

[0007] Accordingly, the present invention relates to a butt connector for joining two hollow profiles, in particular hollow profiles for window or door frames, wherein the butt connector comprises the following: a housing, in particular an extruded profile housing, with a first side wall and an opposing, second side wall; a filling channel for filling adhesives and / or sealants, wherein the filling channel extends in the longitudinal direction of the housing, between the side walls; and a first transverse opening, in particular a transverse bore, which extends through the first side wall into the filling channel, wherein the butt connector has a second transverse opening, in particular a transverse bore, which extends through the first side wall into the filling channel, and wherein the second transverse opening is offset in the longitudinal direction of the filling channel relative to the first transverse opening.

[0008] In other words, the present invention proposes replacing the elongated side channels, i.e., the groove-like longitudinal millings, with transverse openings that extend essentially vertically through at least the first side wall of the filling channel. The first transverse opening can, for example, be a transverse bore connecting the interior of the filling channel to the side surfaces. This allows for spot sealing or bonding of the respective hollow profiles. In some embodiments, the butt connector according to the invention has a plurality of transverse openings, whereby the adhesive or sealant is directed only to the required points on the hollow profiles. The butt connector according to the invention is much simpler to manufacture, since no longitudinal milling is necessary. Rather, for example, a single transverse bore can achieve sufficient distribution of the adhesive or sealant.Furthermore, the targeted application of the adhesives or sealants allows for savings in adhesive or sealant.

[0009] In a further embodiment, the first side wall extends, at least in some areas around the transverse opening, perpendicular to a longitudinal direction of the first transverse opening. In other words, the transverse opening is essentially perpendicular to the side wall of the butt connector. This further simplifies the manufacturing process and further reduces the distribution distance between the filling channel and the side surfaces of the butt connector.

[0010] According to a further embodiment, the butt connector has a screw channel for receiving a fastening element, in particular a self-tapping screw, wherein the screw channel runs perpendicular or parallel to the longitudinal direction of the filling channel. The screw channel is, in particular, separate from the filling channel and serves to fasten the butt connector to the first hollow profile, as will be explained in more detail later. Furthermore, the provision of space-saving transverse openings according to the butt connector according to the invention allows the screw channel to be made larger, so that the fastening elements can be inserted more easily and screwed to the corresponding hollow profile. According to a further embodiment, the filling channel is arranged outside the screw channel.

[0011] According to implementations of the butt connector according to the invention, the screw channel and the filling channel are designed at least partially or in certain areas as one and the same channel, which serves to accommodate a fastening element, in particular a punch screw, and to fill with adhesives and / or sealants.

[0012] It is advantageous for the first transverse opening to extend through the second side wall into the channel, which serves to accommodate a fastening element, in particular a punch screw, and to fill with adhesives and / or sealants.

[0013] Alternatively or additionally, the butt connector has a second transverse opening which extends through the first side wall into the channel which serves to accommodate a fastening element, in particular a punch screw, and to fill with adhesives and / or sealants, wherein the second transverse opening is offset in the longitudinal direction of the filling channel relative to the first transverse opening (448).

[0014] In a further embodiment, the first transverse opening extends through the second side wall into the filling channel. In other words, according to this embodiment, the first transverse opening extends laterally through the entire butt connector, that is, between the first and second side walls. The transverse opening at least partially intersects the filling channel, so that adhesives or sealants introduced into the filling channel can be guided through the first transverse opening to both sides of the butt connector.

[0015] According to this embodiment, only a single transverse opening, for example a transverse bore, is necessary to convey the adhesive or sealant to the two opposite sides of the butt connector. This further reduces the manufacturing effort for the butt connector according to the invention.

[0016] According to the invention, the butt connector has a second transverse opening, in particular a transverse bore, which extends through the first side wall into the filling channel, wherein the second transverse opening is offset in the longitudinal direction of the filling channel relative to the first transverse opening. The first transverse opening can be located closer to the first longitudinal end of the butt connector than the second transverse opening. This allows for efficient savings of adhesive or sealant, even with particularly long butt connectors.

[0017] In a further embodiment, a separating element, in particular a round cord, is arranged in the filling channel between the first and second transverse openings such that the separating element divides the filling channel into separate chambers and prevents adhesive and / or sealant from flowing between the chambers. This is particularly helpful with the long butt connectors mentioned above, as this embodiment allows adhesive or sealant to be selectively directed to several points on the side walls of the butt connector in a simple manner. The first chamber can be filled through an opening in the filling channel on a first longitudinal side of the butt connector, while the second chamber can be filled through an opposite opening at a second longitudinal end of the butt connector.

[0018] According to a further embodiment, the filling channel extends between a first and a second end along a longitudinal direction of the housing, wherein at least one of the two ends is provided with a recess, in particular a milled groove, and wherein the milled groove preferably extends between the first and second side walls. The recesses at the longitudinal ends of the butt connector also allow the two longitudinal ends of the butt connector to be easily supplied with adhesive or sealant. Furthermore, the recesses can simplify the filling of the adhesive or sealant into the filling channel, as this increases the filling area. According to a further aspect, the present invention relates to a door or window frame with a first hollow profile and a second hollow profile connected at right angles to the first hollow profile, wherein a butt connector of the aforementioned type is provided for connecting the first and second hollow profiles.In another embodiment, the butt connector is screwed to the first hollow profile and received in the second hollow profile. The butt connector can also be glued into the second hollow profile.

[0019] The present invention will now be explained in more detail with reference to the embodiments shown in the figures.

[0020] This shows: FIG. 1 a perspective exploded view of a butt joint between two hollow profiles using butt connectors; FIG. 2 a perspective view of one of the in FIG. 1 butt connectors shown; FIG. 3 Front, side and rear view of the butt connector according to FIG. 2FIG. 4 Front, side and top view of a butt connector; FIG. 5 Front, side and top view of a butt connector; FIG. 6 Exploded perspective view of a butt joint between two hollow profiles with butt connectors according to the present invention; FIG. 7 Perspective view of one of the in FIG. 6 shown butt connectors; and FIG. 8 Front, side and top view of the butt connector according to the invention as shown in the embodiment shown FIG. 7 .

[0021] The FIG. 1 Figure 1 shows a perspective view of a butt joint between two hollow profiles, such as those used in window or door frames to create T-joints. Of course, the butt connectors according to the invention can be used for any right-angled connection between two hollow profiles.

[0022] A first hollow profile 102 has two half-shells 104 and 106. The first half-shell 104 can be an outer half-shell, while the second half-shell 106 can be an inner half-shell. Both half-shells 104 and 106 are made of aluminum, for example. Specifically, they are aluminum extrusion profiles, each with a hollow chamber and connecting grooves.

[0023] The two half-shells 104, 106 are connected to each other via one or more insulating webs 108. The insulating webs 108 serve to prevent thermal bridges between the aluminum half-shells 104, 106.

[0024] A second hollow profile 112 has two half-shells 114 and 116. The first half-shell 114 can be an outer half-shell, while the second half-shell 116 can be an inner half-shell. Both half-shells 114 and 116 are made of aluminum, for example. Specifically, they are aluminum extrusion profiles, each with a hollow chamber and additional connecting grooves.

[0025] The two half-shells 114, 116 of the second hollow profile 112 are connected to each other via one or more insulating webs 118. The insulating webs 118 serve to prevent thermal bridges between the aluminum half-shells 114, 116.

[0026] The two hollow profiles 102, 112 are connected at right angles to each other by the schematically illustrated butt connectors 120, 122. For this purpose, the butt connectors 120, 122 are connected to the first hollow profile 102 by means of fasteners 124, such as the self-tapping screws shown here. A first butt connector 120 is connected to the first half-shell 104, while a second butt connector 122 is connected to the second half-shell 106. The butt connectors are inserted into corresponding grooves in the half-shells 104, 106 and fixed at the desired joint point by the fasteners 124. For this purpose, the fasteners 124 can be inserted into the interior of the butt connectors through a screw channel, which will be explained in more detail later, and thus finally connected to the first hollow profile 102.

[0027] The second hollow profile 112 is attached to the butt connectors 120, 122. The butt connectors 120, 122 are inserted into the half-shells 114, 116 of the second hollow profile 112. Specifically, the first butt connector 120 is inserted into the outer half-shell 114, while the second butt connector 122 is inserted into the inner half-shell 116.

[0028] After the second hollow profile 112 has been slid onto the butt connectors 120, 122, it is connected to the butt connectors 120, 122. For this purpose, the two half-shells 114, 116 of the second hollow profile 112 have first openings 126, 128, which, when the second hollow profile 112 is slid onto the butt connectors, are aligned with the pin receptacles 130 of the butt connectors 120, 122. The first openings 126, 128 thus allow the insertion of spring pins 134, 136 into the pin receptacles 130 of the butt connectors. Corresponding openings are also located on the opposite side of the half-shells 114, 116 of the second hollow profile 112, which allows further tension pins 138, 140 to be inserted into the pin receptacles 130 in order to fix the second hollow profile 112 to the butt connectors 120, 122 and thus to the first hollow profile 102, at least temporarily.

[0029] A further, permanent connection between the second hollow profile 112 and the first hollow profile 102 can be achieved using adhesives or sealants. For this purpose, the two half-shells 114, 116 of the second hollow profile 112 have filling openings 142, 144. In the embodiment shown here, the filling openings 142, 144 are arranged parallel to the first openings 126, 128 for the tension pins 134, 136. The filling openings 142, 144 are specifically arranged such that, when the second hollow profile 112 is pushed into place, they are aligned with a filling channel 146 of the butt connectors 120, 122. Adhesives or sealants can thus be introduced into the respective filling channels 146 of the butt connectors 120, 122 via the filling openings 142, 146.

[0030] The adhesive or sealant introduced in this way can be distributed at specific points via transverse openings 148 to one or more side surfaces of the butt connectors 120, 122 in order to permanently connect the butt connectors 120, 122 to the second hollow profile 112 and to achieve a desired sealing effect.

[0031] FIG. 2 shows a perspective view of the butt connector 120, 122 according to FIG. 1 The butt connector has a housing with a first side surface 150 and an opposing second side surface 152. The first and second side surfaces 150, 152 extend between a first and second longitudinal end 154, 156 of the housing of the butt connectors 120, 122.

[0032] The filling channel 146 mentioned above for filling with adhesives and / or sealants extends parallel to the side walls 150, 152, i.e., in the longitudinal direction of the housing of the butt connector 120, 122. In the embodiment shown here, the filling channel is specifically designed as a longitudinal bore extending between the first and second longitudinal ends 154, 156 of the butt connector 120, 122. The pin receptacle 130 also extends in the longitudinal direction of the housing, parallel to the filling channel 146. The pin receptacle 130 can, in particular, be designed as an elongated hole to compensate for lateral tolerances during the (temporary) assembly of the second hollow profile 112 relative to the first hollow profile 102.

[0033] A screw channel 160 extends perpendicularly through the housing of the butt connector to the filling channel 146 and the pin receptacle 130. The screw channel 160 and the filling channel 146 are offset from each other so that they do not intersect. In other words, the screw channel is located outside the filling channel. The screw channel 160 can also be designed, for example, as a through-hole. The screw channel 160 serves to insert the fastening element 124, which is designed to fasten, i.e., screw, the butt connector 120, 122 to the first hollow profile 102.

[0034] The butt connector further comprises a first transverse opening 148, which extends through the first side wall 150 into the filling channel 146. The first transverse opening 148 can be a transverse bore extending from the first side wall 150 into the filling channel 146. In the embodiment shown here, the first transverse opening 148, designed as a transverse bore, extends, in particular, laterally through the entire butt connector, i.e., between the first and second side walls 150, 152, as can be seen in particular from FIG. 3 is recognizable.

[0035] The first transverse opening 148 forms a distribution channel, which serves to convey adhesives and / or sealants, which are introduced into the filling channel 146, to one or both side surfaces 150, 152 at specific points.

[0036] The FIG. 3 shows a front view, side view and top view of the butt connector 120, 122 according to FIG. 2In particular, the side view shown at the top right shows that, according to this embodiment, the first transverse opening 148 extends laterally through the entire housing, i.e., from the first to the second side wall 150, 152. The first transverse opening 148 intersects the longitudinally extending filling channel 146 essentially across its entire surface, thereby effectively preventing unwanted flow resistance for the adhesive or sealant. However, it is also conceivable to arrange the first transverse opening offset from the filling channel, so that the transverse opening only partially intersects the filling channel (not shown).

[0037] By distributing the adhesive or sealant through a transverse opening, the side walls 150, 152 of the housing of the butt connector according to the invention can be formed essentially freely, i.e., in particular without longitudinal milling. In the embodiment shown here, for example, the second side wall 152 is straight and can thus achieve a large contact surface with the second hollow profile. This increases the stability of the connection. Furthermore, the straight design of the second side wall 152 allows for a wider interior 162 of the housing, thus simplifying the insertion of the fastening element 124.

[0038] A second embodiment of a butt connector is the FIG. 4 to be taken. FIG. 4 Shows front, side and top view of the second embodiment of the butt connector 220. The butt connector 220 according to FIG. 4 differs from the butt connector 120 according to the Figures 2and 3 in particular by the fact that the first transverse opening 248 is not designed as a through hole, but as a blind hole. In particular, the first transverse opening extends only from the first side wall 250 into the filling channel 246. In contrast to the embodiment according to the Figures 2 and 3 The first transverse opening 248 therefore does not extend completely laterally through the housing between the two side walls.

[0039] The first transverse opening 248 of the second embodiment according to FIG. 4 The purpose is to distribute adhesives or sealants within the filling channel 246 exclusively in the direction of the first side wall 250. A second transverse opening may be provided, extending from the second side wall 252 into the distribution channel 246. This is preferably spaced apart from the first transverse opening 248 in the longitudinal direction of the butt connector 220.

[0040] The butt connector 320 according to FIG. 5 This essentially corresponds to the butt connector according to the FIG. 4 Accordingly, components with the same effect are marked with corresponding reference numbers, increased by "100". The housing of the butt connector 320 is also marked accordingly. FIG. 5 The first transverse opening 348 is designed as a blind hole and extends from the first side wall 350 into the filling channel 346. The second side wall 352, for example, is designed without a transverse opening.

[0041] Recesses 364 and 366 are arranged at the lateral ends 354 and 356 of the housing. Specifically, these recesses 364 and 366 are milled grooves extending between the first side wall 350 and the second side wall 352. As shown, the recesses are located at the level of the filling channel 346. This allows adhesive or sealant introduced into the filling channel 346 to be distributed along the longitudinal ends 354 and 356. Adhesive can be distributed via the recesses 364 and 366 and the transverse opening 348 to three of the four side surfaces of the butt connector. Of course, it is also possible to provide additional transverse openings to distribute the adhesive to the second side wall 352 as well.

[0042] The FIG. 6 Figure 1 shows a perspective exploded view of a butt joint between two hollow profiles according to a further embodiment. The structure of the hollow profiles 402, 412 according to FIG. 6essentially corresponds to the structure of the hollow profiles 102, 112 according to FIG. 1 . In detail, the half-shells 404, 406 and the associated insulating webs of the first hollow profile 402 are essentially identical to the half-shells of the first hollow profile 102 according to FIG. 1 Only the half-shells 414, 416 of the second hollow profile 412 differ from the corresponding half-shells according to FIG. 1 In particular, the half-shells 414, 416 are wider, that is, the crossbar of the window or door frame formed by the second hollow profile 412 is wider than the crossbar formed by the second hollow profile 112 according to FIG. 1 .

[0043] The butt joint 400 according to FIG. 6is equipped with correspondingly longer butt connectors 420, 422. In other words, the butt connectors 420, 422 extend further in their longitudinal direction than the butt connectors 120, 122 did. Functionally, however, they are almost identical to the butt connectors 120, 122 according to the Figures 1 to 3 , as can be seen in particular from the Figure 7 and 8 This is evident. It should also be mentioned that the filling openings or the clamping openings of the second hollow profile 412 correspond to the respective filling channels or clamping openings of the butt connectors 420, 422.

[0044] The FIG. 7 shows a perspective view of the butt connectors 420, 422 according to FIG. 6 . In the FIG. 8Front, side, and top views of the butt connectors 420, 422 are shown. The housing of the butt connectors has a first side wall 450 and a second, opposing side wall 452. A filling channel 446 extends longitudinally along the housing parallel to and between the two side walls 450, 452. Clamping openings 430 are provided at the lateral ends of the housing, which serve to receive the clamping screws in order to pre-fix the second hollow profile 412 relative to the butt connectors 420, 422.

[0045] In contrast to the butt connectors 120, 122 according to FIG. 2 , the butt connectors 420, 422 exhibit according to the FIG. 7Two screw channels 460, 461 are provided, spaced apart longitudinally. The screw channels 460, 461 of the butt connectors 420, 422 also extend perpendicular to the filling channel 446 and do not intersect it. Each of the screw channels 460 serves to insert a fastening element, in particular a self-tapping screw, which can be used to connect the butt connector 420, 422 to the first hollow profile 402.

[0046] Due to their long longitudinal extension, the butt connectors 420, 422 exhibit according to FIG. 7The housing has two transverse openings 448, 449. A first transverse opening 448 is spaced longitudinally from a second transverse opening 449. The first and second transverse openings 448, 449 extend from the first side wall 450 into the filling channel 446. In particular, both transverse openings 448, 449 extend laterally through the entire housing, that is, between the first side wall 450 and the second side wall 452, as can be seen, for example, from the FIG. 8 This is evident. Thus, both side walls 250, 252 are connected to the filling channel 446 at two points spaced apart longitudinally. Of course, it is also conceivable to have more or fewer transverse openings than those shown in the embodiment according to the Figures 6 to 8The two transverse openings shown are to be provided. Alternatively, one or more transverse openings may extend from only one side wall into the filling channel. In this case, the transverse openings are designed as blind holes, as is the case, for example, in FIG. 4 is shown.

[0047] The FIG. 8 It can further be seen that a separating element 470, in particular a round cord, is arranged between the first and second transverse openings 448, 449. The separating element 470 divides the filling channel 446 into separate chambers. A first chamber is connected to the two side walls 250, 252 via the first transverse opening 448. A second chamber is connected to the two side surfaces 450, 452 via the second transverse opening 449. Thus, the embodiment according to the Figures 6 to 8Adhesive is selectively distributed via the first and second transverse openings 448, 449 to the side walls 450, 452 of the butt connector 420, 422. Adhesive transfer between the two chambers is essentially prevented by the separating element 470.

[0048] The present invention is not limited to the embodiments shown in the figures, but results from the combination of all features disclosed in the claims. Reference symbol list

[0049] 100, 440 butt joint 102, 402 first hollow profile 104, 404 first half shell 106, 406 second half shell 108 insulating web 112, 412 second hollow profile 114, 414 first profile shell 116, 416 second profile shell 118 insulating web 120, 220, 320, 420 butt connector 122, 124 butt connector 124, 224, 324, 424 fastening element 126, 128 clamping opening 130, 230, 330, 430 pin receptacle 134, 136, 138 tension pin 142, 144 filling opening 146, 246, 346, 446 Filling channel 148, 248, 348, 448 Transverse opening 150, 250, 350, 450 First side wall 152, 252, 352, 452 Second side wall 154, 354 First longitudinal end 156, 356 Second longitudinal end 160, 460, 461 Screw channel 162 Interior 364, 366 Recess 470 Dividing element

Claims

1. A butt joint (120, 122, 220, 320, 420, 422) for connecting two hollow profiles, in particular hollow profiles for window or door frames, the butt joint (120, 122, 220, 320, 420, 422) comprising: - a housing, in particular an extruded profile housing, with a first side wall (150, 250, 350, 450) and an opposite second side wall (152, 252, 352, 452); - a filling channel (146, 246, 346, 446) for filling with adhesives and / or sealants, wherein the filling channel (146, 246, 346, 446) extends in the longitudinal direction of the housing between the side walls; - a first transverse opening (146, 248, 348, 448), in particular a transverse bore, which extends through the first side wall (150, 250, 350, 450) into the filling channel (146, 246, 346, 446), characterized in that the butt joint (420, 422) comprises a second transverse opening (449), in particular a transverse bore, which extends through the first side wall (450) into the filling channel (446), and wherein the second transverse opening is offset in the longitudinal direction of the filling channel (446) relative to the first transverse opening (448).

2. The butt joint (120, 122, 220, 320, 420, 422) according to claim 1, wherein the first side wall (150, 250, 350, 450) extends, at least in some regions, around the transverse opening (146, 248, 348, 448) perpendicular to a longitudinal direction of the first transverse opening (146, 248, 348, 448).

3. The butt joint (120, 122, 220, 320, 420, 422) according to claim 1 or 2, wherein the butt joint (120, 122, 220, 320, 420, 422) comprises a screw channel (130, 230, 330, 430) for receiving a fastening element, in particular a punching screw.

4. The butt joint (120, 122, 220, 320, 420, 422) according to claim 3, wherein the screw channel (130, 230, 330, 430) extends perpendicular or parallel to the longitudinal direction of the filling channel (146, 246, 346, 446).

5. The butt joint (120, 122, 220, 320, 420, 422) according to claim 3 or 4, wherein the filling channel (146, 246, 346, 446) is arranged outside the screw channel (130, 230, 330, 430).

6. The butt joint (120, 122, 220, 320, 420, 422) according to claim 3, wherein the screw channel (130, 230, 330, 430) and the filling channel (146, 246, 346, 446) are designed, at least partially or in certain areas, as one and the same channel, which serves to accommodate a fastening element, in particular a punching screw, and for filling with adhesives and / or sealants.

7. The butt joint (120, 122, 420, 422) according to claim 6, wherein the first transverse opening (146, 448) extends through the second side wall (152, 452) into the channel, which serves to accommodate a fastening element, in particular a punching screw, and for filling with adhesives and / or sealants.

8. The butt joint (420, 422) according to claim 6 or 7, wherein the second transverse opening (449) extends through the first side wall (450) into the channel, which serves to accommodate a fastening element, in particular a punching screw, and for filling with adhesives and / or sealants, and wherein the second transverse opening is offset in the longitudinal direction of the filling channel (446) relative to the first transverse opening (448).

9. The butt joint (120, 122, 420, 422) according to any one of claims 1 to 8, wherein the first transverse opening (146, 448) extends through the second side wall (152, 452) into the filling channel (146, 446).

10. The butt joint (420, 422) according to claim 1, wherein a separating element (470), in particular a round cord, is arranged in the filling channel (446) between the first and second transverse openings such that the separating element divides the filling channel (446) into separate chambers and adhesive and / or sealant cannot flow between the chambers.

11. The butt joint (320) according to any one of claims 1 to 9, wherein the filling channel (346) extends between a first and a second end along a longitudinal direction of the housing, and wherein at least one of the two ends is provided with a recess (364, 366), in particular a milling, and wherein the recess preferably extends between the first and second side walls (350, 352).

12. A door or window frame comprising a first hollow profile and a second hollow profile connected at right angles to the first hollow profile, wherein a butt joint (120, 122, 220, 320, 420, 422) according to any one of claims 1 to 11 is provided for connecting the first and second hollow profiles.

13. The door or window frame according to claim 12, wherein the butt joint (120, 122, 220, 320, 420, 422) is screwed to the first hollow profile and is received within the second hollow profile.

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