Method for fixing a profile to a rod, window frame and device for manufacturing a window frame or part of a window frame

Abstract

The invention relates to a method for attaching a profile, in particular a mullion, to a rod for manufacturing a window frame, wherein end faces of overlaps are milled and joined together. The invention further relates to an associated window frame or window subframe and a device for manufacturing a window frame or window subframe.

Description

[0001] The invention relates to a method for fastening a profile, in particular a transom, to a rod and to a window frame or window part frame.

[0002] Window frames are typically used to fit into a building opening and to attach windows to it. Window frames also typically serve the function of providing a defined stop for the windows. When closed, these usually fit tightly against the window frame. For this purpose, a window frame can, in particular, have overhangs, which can be formed on a rod or a profile.

[0003] A profile that is typically positioned vertically in a window frame when installed is also called a transom. Windows typically hinge onto this profile. While most window frames are designed so that two windows open in the same direction, in some countries, designs in which the windows open in different directions are common. A transom for this type of design is also called a double-pane transom.

[0004] The document DE 202 06 377 U1 discloses a method for connecting a cross member to frame parts of a window frame, wherein a Y-shaped welding mirror is used.

[0005] Document GB 2196041 A discloses a window arrangement having at least one window frame whose glazing can be opened.

[0006] Document GB 2288422 A discloses a window post to which a cross member is attached.

[0007] The document GB 2289080 A discloses the joining of frame parts of a window frame.

[0008] The document GB 2120714 A discloses frame parts of a window frame.

[0009] Document GB 2529717 A discloses a window frame and a related manufacturing method.

[0010] The document EP 2105282 A2 discloses a device for connecting plastic profile parts.

[0011] Document GB 2376657 A discloses an apparatus for producing an extruded plastic door.

[0012] The document EP 0921259 A1 discloses a method for producing a casement window.

[0013] It is an object of the invention to provide a method for attaching a profile, in particular a transom, to a rod, which is improved compared to known designs, particularly in that a transom can be easily attached. Furthermore, the invention aims to provide an associated window frame or window subframe. This is achieved according to the invention by a method, a window frame or window subframe, and a device according to the respective main claims. Advantageous embodiments are claimed, for example, in the subclaims.

[0014] The invention relates to a method for attaching a profile, in particular a transom, to a rod for producing a window frame with overlaps on the outside and inside of the window frame. The method comprises the following steps: Providing the bar, wherein the bar extends along a first longitudinal direction and has at least one surface from which a first overlap and a second overlap extend in the same direction, wherein along the first longitudinal direction up to a connecting region, the first overlap is arranged on a first longitudinal side of the surface and, from the connecting region, the second overlap is arranged on a second longitudinal side of the surface, which is opposite the first longitudinal side. Providing the profile, wherein the profile extends along a second longitudinal direction, wherein the profile has a third overlap and a fourth overlap, which extend from diagonally opposite longitudinal edges of the profile in mutually opposite directions. Beveling end faces of the first overlap and the second overlap.so that the first overlap and the second overlap have their greatest extent at the transition to the surface, chamfering the third overlap and the fourth overlap at one longitudinal end of the profile so that the third overlap and the fourth overlap have their greatest extent at the longitudinal end, merging the profile with the bar so that the second longitudinal direction is at an angle, preferably at a right angle, to the first longitudinal direction.

[0015] Through these process steps, the profile and the bar can be advantageously prepared for the connection, as the overlaps are bevelled so that they fit together perfectly.

[0016] The profile can, in particular, be a transom, which is typically vertically aligned in a finished window frame when installed. The rod can, in particular, be a part of a window frame that is horizontally aligned in a finished window frame. It can, for example, be positioned at the top or bottom when installed.

[0017] An outer side can, in particular, be a side of the window frame that, when installed, faces the surroundings of a building. An inner side can, in particular, be a side of the window frame that, when installed, faces an interior of the building.

[0018] Extending the overlaps in the same direction can be understood, in particular, to mean that, viewed from the surface, they extend to the same side relative to a plane of the surface. However, the first overlap and the second overlap are arranged along different longitudinal sides of the surface, whereby these longitudinal sides can, for example, extend along a longitudinal extension of the bar. Thus, the overlaps are typically spaced apart from one another in a direction transverse to the longitudinal extension of the bar.

[0019] The extension in opposite directions, which applies to the third and fourth overlaps, can in particular mean that they extend in different directions when viewed from a plane. The profile can in particular have an at least substantially cuboid-shaped cross-section, with the third and fourth overlaps typically being arranged on diagonally opposite edges of this cuboid.

[0020] The respective largest extension of the first and second overlaps at the transition to the surface can mean, in particular, that a cross-section, viewed along a longitudinal extension of the respective overlap, which can in particular be parallel to the longitudinal extension of the bar, continuously decreases toward the transition to the surface. The same applies to the third and fourth overlaps with respect to their extension toward the longitudinal end.

[0021] According to the invention, the method further comprises the following step: Connecting, in particular gluing or welding, the profile to the bar at the connection area in such a way that after the connection the third overlap at least partially covers the first overlap on the outside and the fourth overlap at least partially covers the second overlap on the outside.

[0022] Such a process can, in particular, achieve a partial overlap of the overlaps, allowing the overlaps to be easily attached to one another and creating an attractive transition. In particular, a visible connection point can be formed at an angle centrally between the profile and the bar.

[0023] According to a possible method not covered by claim 1, the method further comprises the following step: Connecting, in particular gluing or welding, the profile to the bar at the connecting area in such a way that after the connection, an end face of the third overlap covers an end face of the first overlap and an end face of the fourth overlap covers an end face of the second overlap.

[0024] This process eliminates the need to overlap the overlaps, with the overlaps adjoining each other at their end faces. This allows for a simple design, with the end faces adjoining each other along an angle bisector between the bar and the profile, which corresponds, for example, to a mitered design.

[0025] According to a preferred embodiment, respective longitudinal cavities are formed in the first overlap and the second overlap. These cavities can be closed at the front, particularly after connection, by the profile. Such cavities can simplify production and reduce weight. Sealing them with the profile prevents air or moisture from penetrating the window when it is open, which could potentially cause problems.

[0026] According to one embodiment, the third overlap is beveled such that, after joining, it is complementary to the first overlap and partially overlaps the first overlap on the outside. According to another preferred embodiment, the fourth overlap is beveled such that, after joining, it is complementary to the second overlap and partially overlaps the second overlap on the outside. Thus, the beveling can already prepare the respective overlap.

[0027] According to one embodiment, the first overlap is formed along the first longitudinal direction up to the beginning of the second overlap. In particular, this can refer to the aforementioned transitions to the surface. This enables the overlaps to be directly adjacent, despite being arranged on different longitudinal sides.

[0028] According to one embodiment, an intermediate region extending in the longitudinal direction of the bar is formed between the first overlap and the second overlap. This allows the overlaps to be spaced apart from each other in the longitudinal direction. This can also relate in particular to the respective transitions to the surface.

[0029] According to one embodiment, the method further comprises the following steps: Milling out a notch in the bar between the first overlap and the second overlap, so that a longitudinal direction of the notch runs between the first overlap and the second overlap, and milling off the longitudinal end of the profile, which is connected to the bar, on both sides between the third overlap and the fourth overlap, so that bevels run on both sides between the third overlap and the fourth overlap.

[0030] This process further simplifies the attachment of the bar and profile, as the notch can specify the position of the profile and also fix it in place. Furthermore, manufacturing can be simplified, as the corresponding bevels can typically be easily created using milling tools.

[0031] In particular, the notch can be at least substantially or even completely complementary to the bevels. This allows the bevel and notch to advantageously adjoin one another and define their mutual position.

[0032] The notch can, in particular, extend partially into the first overlap and / or the second overlap. The bevels can, in particular, extend partially into the third overlap and / or the fourth overlap. It has been shown that this allows for preferred geometric relationships to be achieved.

[0033] In particular, areas of the end faces of the first overlap and the second overlap that are overlapped by the end faces of the third overlap and / or the fourth overlap can be milled using a separate milling tool, leaving a respective cheek adjacent to the overlap that laterally delimits the notch. This allows the bevels to be executed into the respective overlaps even if the notch is to be laterally delimited by cheeks. For this purpose, a smaller or thinner milling tool can be used than for other bevel designs. This allows the cheeks to be left in a defined manner.

[0034] The milled longitudinal end can engage the notch, especially during connection. This provides additional stability and allows the relative positions to be precisely defined.

[0035] The profile can in particular be welded to the rod using a heating element with a V-shaped or Y-shaped cross-section. This allows for particularly good adaptation to the geometric conditions, since the notch typically has a V-shape, especially when using the notch and bevels described above. If the rod is already in its final solid state when the profile is joined to the rod, a V-shaped heating element can be used. If the connection of two rod sections, as described below, and the connection of the rod to the profile are to take place in a single work step, the use of a heating element with a Y-shaped cross-section is particularly suitable. Such heating elements can advantageously be adapted to the respective geometry.

[0036] According to a possible procedure, the procedure further comprises the following step: Partial milling of the side cheeks of the profile at the longitudinal end, which is connected to the bar.

[0037] By milling off lateral cheeks in this way, the profile can be shaped so that its cheeks optimally fit with the corresponding cheeks of the bar. In particular, cheeks can define sides, particularly essentially or completely flat, which face an inner or outer side when installed.

[0038] In particular, the cheeks can be milled to such an extent that, after joining, they rest flush with the surface of the bar and / or on a respective extension of the surface outside the first and second overlaps. This allows for a particularly attractive design in typical applications.

[0039] The third and fourth overlaps can be beveled, particularly at the longitudinal end, in a rounded or curved shape. This allows for an advantageous adaptation to the first and second overlaps, respectively, so that they can overlap as closely as possible and advantageously lie directly against each other.

[0040] In particular, the first overlap and the third overlap can be provided for the first window. Furthermore, the second overlap and the fourth overlap can be provided for the second window. This allows for the installation of two windows, which can be opened in different directions. This corresponds to the typical design with a double-pane transom.

[0041] The provision of the staff may in particular include the following steps: Providing a starting rod with a continuous overlap, severing the starting rod transversely to the longitudinal direction of the starting rod so that a first rod part and a second rod part are formed, rotating at least the second rod part and merging it with the first rod part so that the surface is continuous, and connecting the first rod part to the second rod part.

[0042] Such a process allows for continuous production without geometric variation for the production of the starting bar. By simply cutting and rejoining, the bar shape required for the process described herein can be achieved. In particular, the first and second overlaps can be formed from the continuous overlap. These can then be milled at their end faces to achieve the desired shape.

[0043] The initial bar can be severed, in particular, transversely to its longitudinal extension. However, other angles can also be used.

[0044] In particular, the first rod part can be joined to the second rod part in a single step, including joining the profile to the rod, using a Y-shaped welding plate. Thus, one process step may be sufficient to join the two rod parts and the profile. Reference is made to the above explanations regarding a Y-shaped welding plate.

[0045] The invention further relates to a window frame or window part frame, at least consisting of a longitudinally extending bar and of a profile adjoining it at an angle, not at the corners of the bar, in a connecting region of the bar, wherein the bar extends along a first longitudinal direction and has at least one surface from which a first overlap and a second overlap extend in the same direction, wherein along the first longitudinal direction up to a connecting region the first overlap is arranged on a first longitudinal side of the surface and from the connecting region the second overlap is arranged on a second longitudinal side of the surface which is opposite the first longitudinal side, and wherein the profile has a third overlap and a fourth overlap which extend from diagonally opposite longitudinal edges of the profile in mutually opposite directions.According to the invention, it is particularly provided that the profile, forming a transom, engages into a notch in the connecting area of ​​the bar. The notch can, in particular, be the notch already described above. This advantageously allows a connection between a bar and a profile to be achieved, thereby achieving the advantages already described above.

[0046] In particular, the profile is connected to the bar using a method described herein. All of the described designs can be used.

[0047] The disclosure further relates to a device for producing a window frame or window subframe, wherein the window frame or the window subframe consists of at least one longitudinally extending rod and a profile adjoining it at an angle, not at the corners of the rod, wherein the rod and the profile consist of welded plastic material, wherein the device is designed in particular for carrying out the method as described herein, and a welding mirror with at least substantially a Y-shaped or V-shaped cross-section is provided for welding the profile to the rod.

[0048] Using such a device, the method described herein can be carried out in a particularly advantageous manner. With regard to the method, all embodiments described herein can be used. In particular, as already described, a welding mirror with a Y-shaped or V-shaped cross-section can be used, whereby the advantages already described above can be achieved.

[0049] The invention will now be described with reference to the figures, in which: Fig. 1: rod parts according to a first embodiment, Fig. 2: a profile according to the first embodiment, Fig. 3: a rod according to the first embodiment, Fig. 4: rod and profile after connection according to the first embodiment, Fig. 5: two rod parts according to a second embodiment, which does not fall under claim 1, Fig. 6: a profile according to the second embodiment, Fig. 7: rod and profile after connection according to the second embodiment, Fig. 8: two rod parts according to a third embodiment, Fig. 9: a profile according to the third embodiment, and Fig. 10: rod and profile according to the third embodiment.

[0050] Fig. 1 shows a first rod part 5a and a second rod part 5b for a process according to a first embodiment. The following also refer to this embodiment. Fig. 2 bis 4 .

[0051] After joining, the rod parts 5a, 5b are joined to form a rod 5. This can, for example, form a bottom or top side of a window frame.

[0052] A first overlap 10 is formed on the first rod part 5a. A second overlap 20 is formed on the second rod part 5b. The overlaps protrude from a surface 7 of the rod 5, wherein the surface 7 is in the Fig. 1 shown state is still separated, and in a connected state is continuous except for the notch to be described later.

[0053] The first overlap 10 is arranged on a first longitudinal side 71 of the surface 7. The second overlap 20 is arranged on a second longitudinal side 72 of the surface 7. The two longitudinal sides 71, 72 are opposite each other with respect to the surface 7, as shown. A transition from the first overlap 10 to the second overlap 20 takes place at a connecting area 8, which in the illustration of Fig. 1 between the two rod parts 5a, 5b.

[0054] The first overlap 10 has a first end face 11. The second overlap 20 has a second end face 21. The first overlap 10 has a greatest extent 12, which, as shown, is arranged at the transition to surface 7. The second overlap 20 also has a greatest extent 22, which, as shown, is arranged at the transition to surface 7. This is achieved by beveling each of the two end faces 11, 21, with a cross-section of the overlaps 10, 20 decreasing towards the connecting region 8. The first end face has a recessed first end face section 16. The second end face has a recessed second end face section 26. In the assembled state, the end face sections 16, 26 directly border other end faces. The respective remainders of the end faces 11, 21, in contrast, form an overlap. This will be described in more detail below.

[0055] As explained below with reference to Fig. 3 As will be described in more detail, a notch is formed between the two rod parts 5a, 5b in the assembled state, wherein the bevels on the end faces 11, 21 of the overlaps 10, 20 can also be formed to produce the respective bevels.

[0056] Fig. 2 shows a profile 100 for carrying out the method according to the first exemplary embodiment. The profile 100 extends along a longitudinal direction and has an at least substantially cuboid-shaped cross-section. A third overlap 130 protrudes from one edge, and a fourth overlap 140 protrudes from a diagonally opposite edge. The profile 100 has a longitudinal end 110, with the overlaps 130, 140 merging into respective bevels 112, 114 of the profile 100 at respective end faces 131, 141 and tapering to a point toward the longitudinal end. Accordingly, the third overlap 130 has its greatest extent 132 at the longitudinal end 110, and the fourth overlap 140 also has its greatest extent 142 at the longitudinal end 110.

[0057] On the sides of the profile 100, cheeks 103, 104 are formed, each merging into a respective overlap 130, 140. As shown, these are partially milled from the longitudinal end 110 so that they are complementary to the bar 5.

[0058] Fig. 3 shows the rod parts 5a, 5b after they have been assembled into rod 5. They were welded together in the middle. As a result, the two rod parts 5a, 5b form a notch 6, which is also defined by bevels formed as an extension of the end faces 11, 21 of the overlaps 10, 20.

[0059] Furthermore, respective cavities 14, 24 are formed in the overlaps 10, 20, which in the present state are open toward the notch 6. It will be shown later that these can be closed by the profile 100.

[0060] In the notch 6 the Fig. 2 The end of the profile 100 shown in FIG. 1 is inserted, in particular such that the longitudinal end 110 engages in the notch 6, wherein the notch 6 is formed complementarily to the bevels 112, 114. This precisely defines the position and orientation of the profile 100 relative to the bar 5.

[0061] A correspondingly assembled state is in Fig. 4 It can also be seen that the cheeks 103, 104 complementarily rest on the outer sides of the rod 5.

[0062] The longitudinal extension of profile 100 is perpendicular to the longitudinal extension of rod 5, which corresponds to the typical design of a window frame. Respective cavities within overlaps 10, 20, 130, 140 are sealed by the other element, i.e., rod 5 or profile 100, at the area where rod 5 and profile 100 adjoin each other, thus preventing the penetration of air or moisture.

[0063] Fig. 5 shows rod parts 5a, 5b for a rod 5 for a method according to a second exemplary embodiment, which does not fall under claim 1. In contrast to the first exemplary embodiment, the overlaps 10, 130 and 20, 140 do not overlap, but the overlaps 10, 20 are merely milled such that their end faces 11, 21 can directly border on the end faces 131, 141 of the third and fourth overlaps 130, 140. In this case, an intermediate region 9 is formed, which is formed along the longitudinal extent of the rod 5 between the first overlap 10 and the second overlap 20, so that, in contrast to the first exemplary embodiment, the overlaps 10, 20 do not directly border one another in the longitudinal direction.

[0064] A first cheek 15 is formed directly adjacent to the first overlap 10. Likewise, a second cheek 25 is formed directly adjacent to the second overlap 20. These cheeks overlap the respective overlap 10, 20 or its outer side, as viewed in a transverse direction of the bar 5, so that the beveling of the respective end face 11, 21 of the respective overlap 10, 20 is not carried out in a single work step with the formation of the notch 6. Rather, the respective end face 11, 21 is formed using a separate tool (not shown), which is typically smaller, so that the respective cheek 15, 25 is retained.

[0065] Fig. 6 shows a profile 100 for the second embodiment. The end faces 131, 141 of the third and fourth overlaps 130, 140 are designed to be flat with the bevels 112, 114, as shown, so that machining in a single step is possible. The flat design of the end faces 131, 141 corresponds to the fact that they should lie flat against the end faces 11, 21 of the first overlap 10 and the second overlap 20, which are also designed to be flat, as shown in Fig. 5 shown.

[0066] Fig. 7 shows an assembled state of the rod 5 of Fig. 5 and profile 100 of Fig. 6 . It can be seen that the rollovers 10, 130 and 20, 140 are not as in Fig. 4 They do not overlap, but merely adjoin each other along respective connecting lines. This creates a miter that forms an angle of 45° with respect to the longitudinal extensions of bar 5 and profile 100.

[0067] Fig. 8 shows rod parts 5a, 5b for a rod 5 for a process according to a third embodiment. The third embodiment essentially corresponds to the first embodiment, wherein the first and second overlaps 10, 20 in the third embodiment are thinner, viewed in the transverse direction of the rod 5, than in the first embodiment. Likewise, Fig. 9 a profile 100 for the process control according to the third embodiment, which is adapted to the rod 5 according to the third embodiment, but otherwise essentially corresponds in terms of its features to the profile 100 according to the first embodiment.

[0068] Fig. 10 shows the rod 5 and the profile 100 in an assembled state according to the third exemplary embodiment in a perspective view. It can again be seen that the second overlap 20 and the fourth overlap 140 partially overlap on the outside, whereby in this case, a miter is also formed at an angle of 45°. The respective cavities are closed by the other element.

Claims

1. A method of attaching a profile (100), in particular a transom, to a bar (5) to produce a window frame with overlaps on the outside and inside of the window frame, the method comprising the following steps: ▪ providing the bar (5), wherein the bar (5) extends along a first longitudinal direction and has at least one surface (7), from which a first overlap (10) and a second overlap (20) extend in the same direction, wherein along the first longitudinal direction up to a connecting region (8) the first overlap (10) is arranged on a first longitudinal side (71) of the surface (7) and from the connecting region (8) the second overlap (20) is arranged on a second longitudinal side (72) of the surface (7), which is opposite the first longitudinal side (71), ▪ providing the profile (100), wherein the profile (100) extends along a second longitudinal direction, wherein the profile (100) has a third overlap (130) and a fourth overlap (140), which extend from diagonally opposite longitudinal edges of the profile (100) in mutually opposite directions, ▪ bevelling of end faces (11, 21) of the first overlap (10) and of the second overlap (20), so that the first overlap (10) and the second overlap (20) have their greatest extension (12, 22) at the transition to the surface (7), ▪ bevelling the third overlap (130) and the fourth overlap (140) at a longitudinal end (110) of the profile (100), so that the third overlap (130) and the fourth overlap (140) have their greatest extent (132, 142) at the longitudinal end (110), ▪ bringing the profile (100) together with the rod (5) so that the second longitudinal direction is angular, preferably at right angles to the first longitudinal direction; and ▪ connecting the profile (100) to the rod (5) at the connecting region (8) in such a way that, after the connection, the third overlap (130) at least partially covers the first overlap (10) on the outside and the fourth overlap (140) at least partially covers the second overlap (20) on the outside.

2. Method according to claim 1, characterised in that respective longitudinally extending cavities (14, 24) are formed in the first overlap (10) and in the second overlap (20), which cavities are closed on the end face by the profile (100) after joining.

3. Method according to one of the preceding claims, characterised in that ▪ that the third overlap (130) is bevelled so that it is complementary to the first overlap (10) after joining and partially covers the first overlap (10) on the outside, and / or ▪ in that the fourth overlap (140) is bevelled in such a way that it is complementary to the second overlap (20) after joining and partially covers the second overlap (20) on the outside.

4. Method according to one of the preceding claims, characterised in that the joining is carried out by gluing or welding5. Method according to one of the preceding claims, characterised in that the first overlap (10) is formed along the first longitudinal direction up to the beginning of the second overlap (20), or in that an intermediate region (9) extending in the longitudinal direction of the rod (5) is formed between the first overlap (10) and the second overlap (20).

6. Method according to one of the preceding claims, further comprising the following steps: ▪ milling out an indentation (6) in the rod (5) between the first overlap (10) and the second overlap (20), so that a longitudinal direction of the indentation (6) extends between the first overlap (10) and the second overlap (20), and ▪ milling on both sides of the longitudinal end (110) of the profile (100), which is connected to the bar (5), between the third overlap (130) and the fourth overlap (140), so that bevelled edges (112, 114) extend on both sides between the third overlap (130) and the fourth overlap (140).

7. Method according to claim 6, characterised in that the notch (6) is at least substantially complementary to the chamfers (112, 114).

8. Method according to one of claims 6 or 7, characterised in that ▪ that the notch (6) partially extends into the first overlap (10) and / or the second overlap (20), and / or ▪ in that the bevelled edges (112, 114) partially extend into the third overlap (130) and / or the fourth overlap (140).

9. Method according to one of claims 6 to 8, characterised in that the milled-off longitudinal end (110) engages in the notch (6) during joining.

10. Method according to one of the preceding claims, further comprising the following step: ▪ partial milling off of lateral cheeks (103, 104) of the profile (100) at the longitudinal end, which is connected to the rod (5), wherein preferably the cheeks (103, 104) are milled off to such an extent that after the connection they lie flat on the surface (7) of the rod (5) and / or on a respective extension of the surface (7) outside the first and second overlaps (10, 20).

11. Method according to one of the preceding claims, characterised in that ▪ that the first overlap (10) and the third overlap (130) are provided for the first window, and / or ▪ in that the second overlap (20) and the fourth overlap (140) are provided for the second window.

12. Method according to one of the preceding claims, characterised in that the provision of the rod (5) comprises the following steps: ▪ Providing an initial rod, with a continuous overlap, ▪ cutting the starting rod transversely to the longitudinal extension of the starting rod, so that a first rod part (5a) and a second rod part (5b) are produced, ▪ Rotating at least the second rod part (5b) and bringing it together with the first rod part (5a) so that the surface (7) is continuous, and ▪ connecting the first rod part (5a) to the second rod part (5b).

13. Method according to claim 12, characterised in that the joining of the first rod part (5a) to the second rod part (5b) is carried out in one working step with the joining of the profile (100) to the rod (5) using a welding mirror with a Y-shaped cross-section.

14. Window frame or window part frame, which is produced by means of a method according to one of the preceding claims and consists at least of a longitudinally extending bar (5) and a profile (100) adjoining it at an angle, not at the ends of the bar (5), in a connecting region (8) of the bar (5), wherein the bar (5) extends along a first longitudinal direction and has at least one surface (7), from which a first overlap (10) and a second overlap (20) extend in the same direction, the first overlap (10) being arranged on a first longitudinal side (71) of the surface (7) along the first longitudinal direction up to a connecting region (8) and the second overlap (20) being arranged on a second longitudinal side (72) of the surface (7) from the connecting region (8) onwards, which is opposite the first longitudinal side (71), and wherein the profile (100) has a third overlap (130) and a fourth overlap (140), which extend from diagonally opposite longitudinal edges of the profile (100) in opposite directions to one another, wherein the profile (100), forming a transom, is arranged on a second longitudinal side (72) of the surface (7) which is opposite the first longitudinal side (71), engages in a notch (6) in the connecting region (8) of the bar (5), the profile being connected to the bar at the connecting region, so that the third overlap (130) at least partially covers the first overlap (10) on the outside and the fourth overlap (140) at least partially covers the second overlap (20) on the outside.

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