CN214365651U

CN214365651U - Section bar, glass fan body

Info

Publication number: CN214365651U
Application number: CN202022721091.1U
Authority: CN
Inventors: 王斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-10-08
Anticipated expiration: 2030-11-23

Abstract

The utility model relates to a section bar and by the glass fan body that this section bar constitutes belongs to door and window class technical field to its heat preservation thermal-insulated effect is poor technical problem among the solution prior art. The section bar is a long strip-shaped body and comprises a section bar main body and a heat insulation strip; the section main body and the heat insulation strip are connected through mutual occlusion and rollingAre integrated into a whole. The glass fan body comprises a fan frame formed by the sectional materials and a hollow glass body arranged in the fan frame, wherein a glass supporting plate is clamped and pressed in a pressing groove of the sectional material at least forming the bottommost part of the frame. The utility model has the advantages of less material consumption, good heat preservation and heat insulation performance; proved by verification, the heat transfer coefficient K value of the glass fan body is lower than 1.5W/(m)²K), even up to 1.0W/(m)²K) below.

Description

Section bar, glass fan body

Technical Field

The utility model relates to a section bar, especially a section bar that is used for heat preservation insulated door or window frame to its glass fan body by this section bar preparation belongs to door and window class technical field.

Background

At present, the commonly used fan frames (including window fan frames and door fan frames, the same below), especially the push-pull opening fan frames, are mostly made of aluminum profiles. For the glass fan needing heat preservation and heat insulation, if the fan frame is made of single aluminum materials, the heat transfer speed is high, and the glass fan is not beneficial to indoor and outdoor heat preservation and heat insulation. At present, a bridge cut-off structure is arranged in the middle of an aluminum profile to prevent the transmission of internal and external heat, so that the effects of heat preservation and heat insulation are achieved. The most typical structure is the structural form of an outer aluminum profile, a plastic nylon profile and an inner aluminum profile. The plastic nylon section bar in the structural form mainly plays a role of 'bridge cut-off' of heat transfer, is used for slowing down the transfer of indoor and outdoor heat and achieves the effects of heat preservation and heat insulation. However, it has many disadvantages: 1. the consumption of the aluminum material is more; because the inner section and the outer section of the fan frame are both made of aluminum materials, the consumption of the aluminum section raw materials is large, the consumption of the raw materials is increased, and the manufacturing cost is increased. 2. The types of the section are more, and the processing procedure is complex; the section bar at least adopts different aluminum sections inside and outside, the inside and outside aluminum sections are respectively processed by at least two steps, and the section bar manufacturing process is added. 3. The sectional material lacks a corresponding functional structure, and the structural strength and the integral stability of the sectional material are poor after the fan blades are assembled and manufactured; because the inner and outer aluminum profiles lack relevant functional structures during assembly, such as cavities for mounting corner connectors and the like, the bearing of the fan blades assembled into the inner and outer aluminum profiles is low and the corners are easy to crack. 4. The most important is that the heat preservation and insulation performance of the fan blade made of the section bar is lower; on one hand, the 'bridge cut-off' effect is not obvious because the plastic nylon section bar as the 'bridge cut-off' is narrow, and on the other hand, the integral structural instability easily causes the corner of the assembled fan blade to crack, which leads to the indoor heat loss.

Disclosure of Invention

The utility model mainly solves the technical problems that the material consumption of the existing section bar is large, the processing times are many, the functional structure is lack and the heat insulation performance is poor, and provides a section bar which is used for installing glass and has good heat insulation performance.

The utility model discloses further provide a by above-mentioned section bar as the frame and assemble, have better heat preservation heat-proof quality's glass fan body to the wholeness of solving current fan body (or flabellum or fan blade), stability and the relatively poor technical problem of heat preservation heat-proof quality.

The utility model is a long strip-shaped body, which comprises a main body of the section and a heat insulation strip; the section main body and the heat insulation strip are mutually occluded and rolled to be connected into a whole; the connecting area is provided with a mounting surface for mounting the hollow glass body; the proportion of the profile main body is 1/5-2/5 in the width direction of the mounting surface; the profile main body is provided with a pressure groove for mounting the glass supporting plate, and the pressure groove is close to the mounting surface to enable the glass supporting plate to be positioned on the mounting surface.

The section bar main body also comprises a main cavity, a baffle and a connecting cavity; the main cavity is a cuboid or an approximate cuboid with a cavity at the central part; the baffle is a flat plate formed by extending one side surface of the main cavity body; the connecting cavity is arranged in the middle of the other opposite side surface of the main cavity, and a pair of clamping strips which are parallel to each other are arranged on the side surface of the connecting cavity back to the main cavity; a first sealing strip notch and a second sealing strip notch are arranged on the side surface of the main cavity body provided with the connecting cavity body; the first sealing strip notch and the second sealing strip notch are respectively positioned on two sides of the connecting cavity and near the corner of the main cavity; the heat insulation strip is provided with a heat insulation cavity, one side surface of the heat insulation cavity is provided with a groove structure matched with the pair of clamping strips, and the heat insulation strip and the profile main body are rolled and connected into a whole through the engagement of the groove structure and the pair of clamping strips; the other side surface of the heat insulation cavity body, which is opposite to the main cavity body, is provided with a mounting cavity body; the mounting surface consists of surfaces of a connecting cavity, a heat insulation cavity and a mounting cavity; the pressure groove is close to the connecting cavity.

The side of the heat insulation strip opposite to the section main body is provided with a glass bead which can be tightly pressed on the side of the hollow glass body assembled on the installation surface.

The glass pressing strip is a plate-shaped body formed by extending and bending the heat insulation strip, and the glass pressing strip faces to the direction of the pressing groove; or the glass bead is provided with a notch structure matched with the heat insulation strip, and the glass bead and the heat insulation strip are tightly installed together through the notch structure.

In the region that main cavity body and separation blade constitute, be equipped with the mounting groove on its main cavity body side, the tip of separation blade is equipped with the third sealing strip notch.

The glass sash body of the utility model comprises a sash frame formed by the sectional materials and a hollow glass body arranged in the sash frame, wherein the sash frame is a closed and planar frame formed by connecting a plurality of the sectional materials in sequence; at least a glass supporting plate is clamped and pressed at the pressure groove of the section bar forming the bottommost part of the frame; the hollow glass body is arranged in a space surrounded by the mounting surface of the section bar, and the hollow glass body is firmly assembled in the fan frame by the mounting surface.

The section bar main body also comprises a main cavity, a baffle and a connecting cavity; the main cavity is a cuboid or an approximate cuboid with a cavity at the central part; the baffle plate is a flat plate formed by extending one side surface of the main cavity body, and the connecting cavity body is arranged in the middle of the other side surface opposite to the main cavity body; and a pair of clamping strips which are parallel to each other are arranged on the side surface of the main cavity body; a first sealing strip notch and a second sealing strip notch are arranged on the side surface of the main cavity body provided with the connecting cavity body; the first sealing strip notch and the second sealing strip notch are respectively positioned on two sides of the connecting cavity and near the corner of the main cavity; the heat insulation strip is provided with a heat insulation cavity, one side surface of the heat insulation cavity is provided with a groove structure matched with the pair of clamping strips, and the heat insulation strip and the profile main body are rolled and connected into a whole through the engagement of the groove structure and the pair of clamping strips; the other side surface of the heat insulation cavity body, which is opposite to the main cavity body, is provided with a mounting cavity body; the mounting surface consists of surfaces of a connecting cavity, a heat insulation cavity and a mounting cavity; the pressure groove is close to the connecting cavity.

The side, opposite to the section bar main body, of the heat insulation strip is provided with a glass bead which can be tightly pressed on the side surface of the hollow glass body assembled on the installation surface; the glass pressing strip is a plate-shaped body formed by extending and bending the heat insulation strip, faces the direction of the glass pressing strip, or has a notch structure matched with the heat insulation strip and is tightly installed with the heat insulation strip through the notch structure.

Arranging a first sealing strip between the notch of the first sealing strip and the surface of the hollow glass body; and/or the second sealing strip notch is provided with a second sealing strip.

Corner connectors or connecting pieces are arranged in the main cavity or/and the connecting cavity or/and the heat insulation cavity or/and the mounting cavity at the connecting part of the profiles.

The section bar in the utility model is formed by integrally pressing the single section bar main body and the heat insulation strip, thereby reducing the section bar consumption, the section bar processing times and the assembly and manufacture time; the internal and external widths of the heat insulation strips are increased, so that the transmission of internal and external heat is favorably slowed down; by arranging the supporting plate pressing strip, the glass supporting plate is convenient to mount, and the weight of the glass is transferred to the profile main body through the supporting plate, so that the deformation caused by the weight of the glass is prevented; because set up main cavity, thermal-insulated cavity and installation cavity, be convenient for assemble accessories such as angle sign indicating number in each cavity, have better wholeness, stability and fastness after assembling the frame by this section bar.

The fan blade formed by the sectional material has few parts and is fast to assemble and assemble; the integral bearing strength of the fan blade is improved, deformation, tension crack and the like caused by the weight of glass are effectively overcome, and heat loss is prevented.

The glass sash body formed by the section bar can effectively reduce the width or thickness of the section bar main body by adopting the glass supporting plate to transfer the weight of glass to the section bar main body, and can increase the width or thickness of the heat insulation strip on the premise of the same width or thickness, thereby improving the heat insulation performance of the glass sash body. The heat insulation strips and the glass pressing strips are made of heat insulation materials, so that the transmission of internal and external heat is delayed, and the heat insulation and heat preservation performance is also improved. Proved by verification, the heat transfer coefficient K value of the glass fan body is lower than 1.6W/(m)²K), even up to 1.0W/(m)²K) below.

Drawings

Fig. 1 is a schematic end view of the section bar of the present invention;

FIG. 2 is a schematic view of the tooling assembly for the profile of FIG. 1;

fig. 3 is a schematic front view of a second end surface of the middle section bar of the present invention;

FIG. 4 is a schematic view of the machining and assembly of the profile shown in FIG. 3

FIG. 5 is a schematic front view of another end face of the middle section of the present invention;

FIG. 6 is a schematic view of the machining and assembly of the profile of FIG. 5

FIG. 7 is a first schematic view of a glass sash made of the inventive profile;

FIG. 8 is a first schematic view of a glass sash made of the inventive profile;

fig. 9 is a first schematic view of a glass sash made of the profile of the present invention.

The reference symbols in the drawings have the following meanings: 10: a profile body; 11: groove pressing, 12: main chamber, 13: a baffle, 14: connecting cavity, 15: card strip, 16: first seal groove, 17: second seal groove, 18: mounting groove, 19: a third seal strip notch. 20: a heat insulating strip; 21: insulating cavity, 22: groove structure, 23: mounting cavity, 24: and (5) pressing the glass strips. 30: and (3) a mounting surface. 40: a fan frame; 41: a glass body supporting plate. 50: a hollow glass body.

Detailed Description

In the present embodiment, a glass window is taken as an example for detailed description, and the present invention is similarly applicable to a glass door and the like, unless otherwise specified.

Referring to fig. 1 to 6, the profile of the present invention is a long strip, and each part or each component of the profile has the same length. It comprises a profile body 10 and a heat insulating strip 20. The section main body 10 is generally made of aluminum or aluminum alloy materials and mainly plays a supporting role in application; the heat insulation strip 20 is made of plastic nylon and the like, and mainly plays a role in heat insulation. The profile body 10 and the heat insulating strip 20 are integrated by mutual engagement and rolling. The mutual occlusion means that the concave-convex structures which are mutually inosculated are occluded together by matching, and then the concave-convex structures are rolled into a whole with certain binding force; the process can adopt the existing common processing technology. A mounting surface 30 for mounting the hollow glass body in the joining region; the proportion of the profile main body is 1/5-2/5 in the width direction of the mounting surface 30; through the connection, the connection between the two parts is reliable and firm, the consumption of the section main body can be effectively reduced, and the width of the heat insulation strip is increased. A pressure groove 11 for mounting the hollow glass body supporting plate is arranged on the section bar main body 10, and the pressure groove 11 is close to the mounting surface 30 so that the mounted glass body supporting plate is positioned on the mounting surface; the indent is used to mount the glass pallet so that the weight of the glass is transferred through the glass pallet to the profile body 10.

Referring to fig. 1 to 6, the profile body 10 further includes a main cavity 12, a baffle 13, and a connecting cavity 14; the main cavity 12 is a cuboid or an approximate cuboid with a hollow central part, and the baffle 13 is a flat plate formed by extending one side surface of the main cavity 12 so as to shield the internal space and form a structural function interval. The fan body assembled by the fan body mainly plays a supporting role, and is convenient to assemble, install and maintain the integral effect of the vertical face after installation. The connecting cavity 14 is arranged in the middle of the other opposite side surface of the main cavity, and a pair of clamping strips 15 which are parallel to each other are arranged on the side surface of the connecting cavity opposite to the main cavity 12 and used for assembling the heat insulation strip 20 on the profile main body 10 through processes such as rolling and the like; the heat insulating strip 20 is assembled with the connecting cavity 13 in the profile body through the pair of clamping strips 15 by a rolling process and the like. A first sealing strip notch 16 and a second sealing strip notch 17 are arranged on the side surface of the main cavity body provided with the connecting cavity body; the first sealing strip notch 16 and the second sealing strip notch 17 are respectively positioned at two sides of the connecting cavity 14 and near the corner of the main cavity and are respectively used for installing a glass sealing strip and a fan sealing strip; the insulating strip 20 has a length corresponding to the main body of the section bar and has an insulating cavity 21 to block the internal and external transfer of heat; a groove structure 22 matched with the pair of clamping strips 15 is arranged on one side surface of the heat insulation cavity 21, and the heat insulation strips 20 and the section bar main body 10 are rolled and connected into a whole through the snap fit of the groove structure 22 and the pair of clamping strips 15; the other side surface of the heat insulation cavity 21 opposite to the main cavity 12 is provided with a mounting cavity 23; the mounting surface 30 is formed by the surfaces of the connecting cavity 14, the heat insulation cavity 21 and the mounting cavity 23; the indent 11 described above is adjacent to the connecting cavity 14. The other side surface of the heat insulation cavity 21 opposite to the main cavity 12 is provided with a mounting cavity 23; the mounting surface 30 is formed by the surfaces of the connecting cavity 14, the heat insulation cavity 21 and the mounting cavity 23; the indent 11 described above is adjacent to the connecting cavity 14.

Referring to fig. 1, 3 and 5, a glazing bead 24 is provided on the side of the insulating strip 20 facing away from the profile body, which glazing bead can be pressed tightly against the side of the hollow glass body mounted on the mounting surface 30 and simultaneously acts as a seal.

With continued reference to fig. 5 and 6, the glazing beads 24 are formed by extending and bending the insulating strips 20 into a plate shape, and the glazing beads 24 face the direction of the pressing groove 11. Specifically, the glass bead 24 is a plate-shaped body formed by extending and bending the mounting cavity 23, and the glass bead 24 faces the direction of the glass pallet clamping strip 15; further blocking the transmission of internal and external heat and facilitating the further compacting of the glass fitted above the connecting chamber 14 and the insulating chamber 21.

Referring back to fig. 1-4, as another configuration, the glazing beads 24 have a notch structure that mates with the insulating strips 20, and the notch structure mates with the mounting cavity of the insulating strips to mount the two closely together. As a more specific structure, the other opposite side surface is provided with a mounting cavity 23; the mounting cavity 23 mounts a glazing bead 24. The structure can be integrally assembled when the section bar is processed; the glazing beads 24 can also be assembled on the mounting cavity 23 when the glass sash bodies are assembled, so that the assembly is convenient.

Referring to fig. 1 to 6, in the region formed by the main cavity 12 and the blocking plate 13, an installation groove 18 is provided on the side surface of the main cavity for installing a structural member, such as an opening mechanism for pushing and pulling the fan body in parallel (see related arts, for example, patent documents CN101881121B and CN 206233796U), and since it does not belong to the main technical content of the present invention, the detailed description will not be provided. A third seal groove 19 is provided at the end of the shutter 13 for fitting a seal to ensure sealability with the installation body (e.g., a window frame).

Referring to fig. 7 to 9, the glass sash of the present invention includes a sash frame 40 formed by any one of the above-mentioned sectional materials, and a hollow glass body 50 installed in the sash frame. The sash frame 40 is a closed, planar frame formed by connecting a plurality of the above-described profiles in sequence. Generally, the fan frame is a closed quadrilateral planar frame; the novel electric fan comprises an upper fan frame, a lower fan frame, a left fan frame and a right fan frame; the left sash frame, the upper sash frame, the right sash frame and the lower sash frame are all made of the sectional materials, and the sectional materials are sequentially connected to form a closed and planar quadrilateral frame; other shapes are also possible. Adopting a chamfer angle of 45 degrees at the corner part where the sections are connected with each other; and angle connectors or similar connectors are arranged in the main cavity 12 or/and the connecting cavity 14 or/and the heat insulation cavity 21 or/and the mounting cavity 23 at the connecting part of the profiles, so that the firmness and the stability of the connecting part are ensured, the integrity of the connecting part is improved, and deformation and pulling crack are prevented. At least at the pressure groove 11 of the section bar which forms the bottommost part of the frame, a glass body supporting plate 41 is clamped and pressed, and the glass body supporting plate 41 is used for supporting the hollow glass body 50 and transmitting the weight of the hollow glass body to the section bar main body 10 to prevent deformation; the hollow glass body 50 is provided in a space surrounded by the attachment surface 30 of the profile, and the hollow glass body 50 is firmly attached to the sash frame 40 by the attachment surface 30. The glass supporting plate 41 clamped and pressed on the section bars abuts against the surfaces of the connecting cavity 14, the heat insulation cavity 21 and the like. The glass carrier plate 41 is mainly arranged on the section bar at the bottom of the fan body, and can be arranged in a discontinuous mode or on the section bar at the bottom of the whole block.

A glass bead 24 which is tightly pressed against the side of the hollow glass body assembled on the installation surface 30 is arranged on one side of the heat insulation strip 20 opposite to the profile body; the glass bead 24 is a plate-shaped body formed by extending and bending the heat insulating strip 20, and the glass bead 24 faces the direction of the pressure groove 11, or the glass bead 24 has a notch structure fitting with the heat insulating strip 20, and the two are tightly installed together by matching the notch structure and the heat insulating strip (see the above description of the relevant section).

The profile body 10 has the same structural features as those of the above-mentioned profile, such as a pressing groove 11, a main cavity 12, a blocking piece 13, a connecting cavity 14, a pair of clamping strips 15, a first sealing strip notch 16, a second sealing strip notch 17, a mounting groove 18, a third sealing strip notch 19, and the like, which are specifically referred to the above description. Similarly, the heat insulating strips 20 have the same structure as described above.

Referring again to fig. 7-9, a first bead, 42, is provided between the first bead notch 16 and the surface of the insulating glazing body 50; and/or the second seal groove 17 is fitted with a second seal 43 (see fig. 8). The hollow glass body 50 may be formed of two layers of hollow glass or may be formed of three layers of hollow glass.

The main cavity or/and the connecting cavity or/and the heat insulation cavity or/and the mounting cavity at the connecting part of the profiles are internally provided with corner connectors or connecting pieces and other similar structures so as to ensure that the window frame formed by the profiles has better stability and firmness and enough strength.

Claims

1. A section bar is a long strip-shaped body and comprises a section bar main body (10) and a heat insulation strip (20); the method is characterized in that: the section main body (10) and the heat insulation strip (20) are mutually meshed and rolled to be connected into a whole; a mounting surface (30) for mounting the hollow glass body is arranged in the connection area; the proportion of the profile main body is 1/5-2/5 in the width direction of the mounting surface (30); the profile main body (10) is provided with a pressure groove (11) for mounting the glass supporting plate, and the pressure groove (11) is close to the mounting surface (30) so that the mounted glass supporting plate is positioned on the mounting surface.

2. Profile according to claim 1, characterized in that: the section bar main body (10) further comprises a main cavity (12), a baffle plate (13) and a connecting cavity (14); the main cavity (12) is a cuboid or an approximate cuboid with a cavity at the central part; the baffle plate (13) is a flat plate formed by extending one side surface of the main cavity (12), and the connecting cavity (14) is arranged in the middle position of the other opposite side surface of the main cavity; and a pair of clamping strips (15) which are parallel to each other are arranged on the side surface of the main cavity (12); a first sealing strip notch (16) and a second sealing strip notch (17) are arranged on the side surface of the main cavity body provided with the connecting cavity body; the first sealing strip notch (16) and the second sealing strip notch (17) are respectively positioned at two sides of the connecting cavity (14) and near the corner of the main cavity; the heat insulation strip (20) is provided with a heat insulation cavity (21), one side surface of the heat insulation cavity (21) is provided with a groove structure (22) which is matched with the pair of clamping strips (15), and the heat insulation strip (20) and the profile main body (10) are rolled and connected into a whole through the snap fit of the groove structure (22) and the pair of clamping strips (15); the other side surface of the heat insulation cavity (21) opposite to the main cavity (12) is provided with a mounting cavity (23); the mounting surface (30) is formed by the surfaces of the connecting cavity (14), the heat insulation cavity (21) and the mounting cavity (23); the pressure groove (11) is close to the connecting cavity (14).

3. Profile according to claim 1 or 2, characterized in that: the side of the heat insulating strip (20) facing away from the profile body is provided with a glazing bead (24) which can be tightly pressed against the side of the hollow glass body mounted on the mounting surface (30).

4. Profile according to claim 3, characterized in that: the glass pressing strip (24) is a plate-shaped body formed by extending and bending the heat insulation strip (20), and the glass pressing strip (24) faces to the direction of the pressing groove; alternatively, the glazing beads (24) have a recess configuration which engages the insulating strips (20) and through which the glazing beads are held in close proximity by the insulating engagement.

5. Profile according to claim 1 or 2 or 4, characterized in that: in the area formed by the main cavity (12) and the baffle (13), the side surface of the main cavity is provided with an installation groove (18), and the end part of the baffle (13) is provided with a third sealing strip notch (19).

6. Glass sash comprising a sash frame (40) constituted by the profile of claim 1 and a hollow glass body (50) mounted inside the sash frame, characterized in that: the fan frame (40) is a closed and plane frame formed by connecting a plurality of the sectional materials in sequence; a glass supporting plate (41) is clamped and pressed in the pressing groove (11) of the section bar which forms the bottommost part of the frame; the hollow glass body (50) is arranged in a space surrounded by the mounting surface (30) of the section bar, and the hollow glass body (50) is firmly assembled in the fan frame (40) through the mounting surface (30).

7. The glass sector of claim 6, wherein: a glass bead (24) which is tightly pressed against the side surface of the hollow glass body assembled on the installation surface (30) is arranged on one side, opposite to the section bar main body, of the heat insulation bar (20); the glass bead (24) is a plate-shaped body formed by extending and bending the heat insulation strip (20), and the glass bead (24) faces the direction of the pressure groove (11), or the glass bead (24) is provided with a notch structure matched with the heat insulation strip (20) and is tightly installed with the heat insulation strip through the notch structure.

8. The glass sector of claim 6 or 7, characterized in that: the section bar main body (10) further comprises a main cavity (12), a baffle plate (13) and a connecting cavity (14); the main cavity (12) is a cuboid or an approximate cuboid with a cavity at the central part; the baffle plate (13) is a flat plate formed by extending one side surface of the main cavity (12), and the connecting cavity (14) is arranged in the middle position of the other opposite side surface of the main cavity; and a pair of clamping strips (15) which are parallel to each other are arranged on the side surface of the main cavity (12); a first sealing strip notch (16) and a second sealing strip notch (17) are arranged on the side surface of the main cavity body provided with the connecting cavity body; the first sealing strip notch (16) and the second sealing strip notch (17) are respectively positioned at two sides of the connecting cavity (14) and near the corner of the main cavity; the heat insulation strip (20) is provided with a heat insulation cavity (21), one side surface of the heat insulation cavity (21) is provided with a groove structure (22) which is matched with the pair of clamping strips (15), and the heat insulation strip (20) and the profile main body (10) are rolled and connected into a whole through the snap fit of the groove structure (22) and the pair of clamping strips (15); the other side surface of the heat insulation cavity (21) opposite to the main cavity (12) is provided with a mounting cavity (23); the mounting surface (30) is formed by the surfaces of the connecting cavity (14), the heat insulation cavity (21) and the mounting cavity (23); the pressure groove (11) is close to the connecting cavity (14).

9. The glass sector of claim 8, wherein: -providing a first sealing strip (42) between the first sealing strip notch (16) and the surface of the hollow glass body (50); and/or the second seal groove opening (17) is provided with a second seal (43).

10. The glass sector of claim 8, wherein: corner connectors or connecting pieces are arranged in the main cavity (12) or/and the connecting cavity (14) or/and the heat insulation cavity (21) or/and the mounting cavity (23) at the connecting part of the profiles.