SK285402B6 - Flange profile for attachment to abutting air channel elements - Google Patents

Abstract

The invention relates to a flange profile (1) for attachment to abutting air channel elements and for receiving angle brackets for forming an assembly frame. The flange profile (1) has an essentially L-shaped cross-section. An L-limb (2) is profiled as a double-walled (3, 4) limb, which is open on one side and which is provided for overlapping the edge areas of the air channel elements, and the other limb (5) of the flange profile (1) is profiled as a hollow cavity (8) for receiving a limb of an angle bracket. In the transition area of both of these limbs (2, 5) of the flange profile (1) a backward folding (9a, 9b) by 180 ° forms a double wall, which separates both limbs and which touches one of the wall areas (6, 7) with its backward folded lug. The wall area (6, 7) and the backward folded lug (9a, 9b) are joined to one another by means of a laser weld seam (10).

Description

Technique

FIELD OF THE INVENTION The present invention relates to a flange profile for mounting on the contact edges of air ducts and for receiving corner angles forming a mounting frame, the flange profile being substantially L-shaped in cross-section, the horizontal arm of which consists of two horizontal walls with an open space on one side. a horizontal hollow chamber for supporting the edges of the air duct is formed in the vertical flange arm and a corner bend is formed in the vertical flange arm and at the transition point between the flange arms at a 180 ° angle, its top touches the opposite vertical wall.

BACKGROUND OF THE INVENTION

The invention is based, for example, on German utility model no. 91 14 679-U1 of the same applicant or from the flange profiles described in EP-0 085 355-A1 and DE-32 03 204-A1 respectively.

Known flange profiles, in particular the flange profile according to German utility model no. 91 14 679-U1, characterized in that they already provide a high degree of tightness against air leakage from the air duct. Additional seals within the flange profile are also known, for example from DE 36 18 822 C2, DE 43 03 150 A1 or DE 93 20 128 U1. However, leaks may still occur, especially if the air ducts are slightly bent so that air can penetrate between the air duct wall and the flange profile fitted, and this can then cross laterally through the flange profile area that serves to accommodate the corner bracket arm .

SUMMARY OF THE INVENTION It is an object of the invention to overcome this drawback.

SUMMARY OF THE INVENTION

The problem is solved and the drawbacks of known solutions of this kind are largely eliminated by a flange profile for mounting on the contact edges of the air ducts and for locating the corner angles forming the mounting frame, the flange profile being substantially L-shaped in cross-section. horizontal walls with open gap between these horizontal walls to surround the edges of the air duct, in the vertical flange leg, a hollow chamber is provided to accommodate the corner bracket, and at a transition point between the flange leg profiles at 180 ° at one of the vertical walls a recoiling bend separating these vertical walls from one another, which apexes against the opposite vertical wall according to the invention, is characterized in that the vertical wall and the recurve are connected to each other by a laser weld seam.

Due to the laser weld seam, it is possible to make part of the flange profile as a hollow chamber and to close the hollow chamber airtight against the flange profile area which slides onto the air duct. The laser weld seam ensures that there is no risk that the flange profile is twisted or otherwise deformed when welding, as with conventional weld seams.

Said hollow chamber may be formed in the flange profile in various ways, for example by providing the laser weld seam in a smooth, in the working position in the plane of the separating gap, of the front vertical wall of the vertical arm.

If the backward bend is formed inwardly in a sheet located in the plane of the separating joint, the laser weld seam is located in the plane of the separating joint facing away from the rear vertical wall of the vertical arm. The result of this sealing of the flange profile region above the laser weld seam is the same as in the case of a return bend formed on the opposite vertical wall.

It goes without saying that the laser weld seam does not necessarily have to be passable. As is known from welding techniques, the laser weld seam can also be interrupted, in which case it is not so much the tightness but the stiffness of the thus produced flange profile against twisting.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is further elucidated with reference to the accompanying drawing, in which:

FIG. 1 shows a first embodiment of a flange profile according to the invention;

FIG. 1a shows a section through a detail of the flange profile of FIG. 1 with the weld seam indicated;

FIG. 2 shows a second embodiment of a flange profile according to the invention; and

FIG. 2a is a cross-sectional detail of the flange profile of FIG. 2 with the weld seam indicated.

DETAILED DESCRIPTION OF THE INVENTION

The flange profile 1 is cold formed from a sheet metal strip and has a substantially L-shaped cross-section with a double-walled lower arm 2, the horizontal walls of which 3 and 4 are slid onto the front edge of an air channel (not shown). The vertical leg 5 of the flange profile 1 consists of vertical walls 6 and 7, between which a hollow chamber 8 is formed, into which the arms of the corner angles can be inserted in the working position, which is not further described here.

The functionally identical elements in FIG. 1 and 2 are designated with the same reference numerals.

The front vertical wall 6 of the vertical arm 5, in which the hollow chamber 8 is formed, is in both embodiments in the working position in the plane of the separating joint. An elastic seal or the like is then placed on this front vertical wall 6. In the example of FIG. 1, the hollow chamber 8 is delimited by a downward deflection 9a of the sheet, which forms a distant rear vertical wall 7 from the plane of the separating joint.

In the case of FIG. 2, the hollow chamber 8 is delimited by the downward deflection 9b of the sheet which forms the plane of the dividing joint forming the front vertical wall 6.

It will be appreciated that both the sheet bend 9a and the sheet bend 9b always rest on the opposite wall, in the first case on the front vertical wall 6, in the second case on the rear vertical wall 7. The top of the return bend 9a, 9b is on this vertical. The wall 6, 7 according to the invention is fastened by a laser weld seam 10, as can be seen in particular from the enlarged details in FIG. 1a and 2a.

Claims (3)

PATENTOVÉNÁROKY A flange profile (1) for mounting on the contact edges of the air ducts and for accommodating corner angles forming a mounting frame, the flange profile (1) being substantially L-shaped in cross-section, the horizontal arm (2) of which consists of two horizontal walls (3, 4) with an open gap between these horizontal walls (3, 4) to surround the air duct edges, a hollow chamber (8) is provided in the vertical arm (5) of the flange profile (1) for receiving the angle bracket arm and at the transition point between the legs (2, 5) of the flange profile (1), a return bend (9a, 9b) is formed on one of the vertical walls (7, 6) of the vertical arm (5) at 180 ° separating these vertical walls (6, 7), which touches with its apex the opposite vertical wall (6, 7), characterized in that the vertical wall (6, 7) and the return bend (9a, 9b) are connected to each other by a laser weld seam (10). The flange profile according to claim 1, characterized in that the laser weld seam (10) is located in a smooth, in the working position in the plane of the dividing joint located in the front vertical wall (6) of the vertical arm (5). The flange profile according to claim 1 or 2, characterized in that the laser weld seam (10) is located in the distal plane of the rear vertical wall (7) facing away from the vertical arm (5).