DE4239050A1 - Method for producing housing for part of air guidance system - involves flanged inner walls with slot in one wall and splicing strips on other, flanges having outer strips to abut or overlap splicing strips - Google Patents

Abstract

The inner walls (9) are edged by flanges (12,5). A slot (10) is provided in one of the inner walls and the other wall has a section which is separated and edged by two splicing strips (15,16). The edges of the strips are set opposite each other after the wall is slid into the slot. An outer strip (8,13) edges the flanges and bluntly abuts or overlaps the other side of the splicing strips. Recesses (17) are formed in the regions of the bend lines in the splicing strips. USE/ADVANTAGE - Esp. for accommodating a fire proof flap in the air guidance system. The production does not require any additional components and is cost effective.

Description

The invention relates to a method for producing a Housing for part of an air duct system, in particular to accommodate a fire damper, whereby Side element from at least one flange and one Inner wall with a top and / or bottom element connected at least one flange and an inner wall be, as well as a corresponding housing.

Housing for part of an air duct system can for example housings for ceiling or floor outlets, Channel pieces with throttling devices or the like. in the The present exemplary embodiment is primarily based on a Part of an air duct system in which the A fire damper is located in the air duct system. When Example is mainly based on DE-OS 41 14 296 referred.  

Such housings for a fire damper are in usually of two frame parts that are fixed together or are slidably connected. Every frame part has an approximately rectangular housing box, whereby the fire damper is located in one of the housing boxes. At the front, the housing box is covered by a flange circulate.

So far, these housings are made by folding and Welding the different parts together. In some cases there are also mechanical connections through rivets, Spot welding, screws or the like instead. This is complex and especially when welding galvanized Sheets from industrial hygiene and environmental protection questionable.

The present invention has for its object a Possibility of manufacturing housings of the above Kind to create, which does not have these disadvantages, the Manufactured in a simple way without additional aids and should be done inexpensively.

To solve this problem, the inner walls of their respective flanges are folded and into a A slot is formed in the inner wall and that at the the other inner wall by cutting two tabs be separated and folded.

The two flaps should preferably be folded opposite to each other, so that thereby a good hold between side element and deck or Floor element is made. In one embodiment of the Invention is contemplated to be folding before Insert the inner wall into the slot. In the other embodiment of the invention on the other hand, first put the tabs through the slot  and then, preferably opposite to each other, folded. Both embodiments are equivalent.

So that a further displacement of the inner wall within the Avoid slot, should preferably from the flange another outer strip is folded, which in turn on the other hand, the flaps abut the inner wall. As a result, there is virtually an inner wall between the tabs and pinched the outer edge of the outer strip.

To mark a bending line around which the tabs should be bent and to facilitate the folding are preferably located in the area of the bending line Recesses.

The invention also encompasses a corresponding housing, in which a slot is formed in an inner wall and from reaching through at least one tab of the other inner wall which is bent approximately at right angles from the inner wall and strikes the inside wall from the outside. It can a single tab is sufficient, be preferred however, at least two tabs are provided, which are folded opposite to each other.  

Further advantages, features and details of the invention result from the following description more preferred Exemplary embodiments and with reference to the drawing; these shows in

Figure 1 is a plan view of a frame for a fire damper.

Figure 2 is a partially shown section of a corner area of a frame for a fire damper.

Fig. 3 shows a cross section through the corner area of FIG. 1 along line II-II.

For general assembly and storage of a Fire damper is referred to DE-OS 41 14 296.9. The fire damper is usually in a housing stored, which consists of one or two frames, the either firmly connected to each other or in each other are slidably arranged. Here is a wall-ceiling Distinguish frame from a lead frame.

In Fig. 1 is a plan view, for example, displayed on a housing. All-round frame strips can be seen, two side elements 1 and 2 being separated from one another by a cover element 3 and a base element 4 .

In FIGS. 2 and 3, a connection between a sidewall strips 1 and 2 and a cover member 3 and the bottom member 4 is shown in each case. A side element 1 or 2 has a flange 5 , of which only the inner surface is shown in FIG. 3. Holes 6 for fastening the entire frame and holes 7 for fastening an angle which forms the corner of the housing are arranged in the flange 5 . Furthermore, a short outer strip 8 and an inner wall 9 are folded from this flange 5 . A slot 10 is formed in the inner wall 9 , which is penetrated by an inner wall 11 , which in turn is bent by a flange 12 of a cover element 3 or bottom element 4 . Parallel to the inner wall 11 there is a further outer strip 13 on the flange 12 , which abuts the inner wall 9 with its end edge 14 .

To hold the cover element 3 or base element 4 , part of the inner wall 11 is slotted in, two tabs 15 and 16 being formed. These tabs 15 and 16 are bent approximately at right angles to the slot 10 and strike the inner wall 9 from the outside. The tabs 15 and 16 are inserted through the slot 10 and then bent.

In order to facilitate bending, the tabs 15 and 16 are preferably provided with recesses 17 in the region of their bending line.

Item number list

1 side element
2 side element
3 cover element
4 floor element
5 flange
6 holes
7 holes
8 outer strips
9 inner wall
10 slot
11 inner wall
12 flange
13 outer strips
14 front edge
15 tab
16 tab
17 recess

Claims (6)

1. A method for producing a housing for part of an air duct system, in particular for receiving a fire damper, wherein side elements are connected from at least one flange and an inner wall with a top and / or bottom element from at least one flange and an inner wall, characterized in that the inner walls are chamfered by their respective flange and a slot is formed in an inner wall and that two flaps are separated from one another and folded on the other inner wall by a cut. 2. The method according to claim 1, characterized in that the flaps of the tabs opposite to each other the inner wall is inserted into the slot. 3. The method according to any one of claims 1 to 3, characterized characterized in that an outer strip of the flange is folded, on the other hand the tabs on the The inner wall abuts or overlaps. 4. The method according to at least one of claims 1 to 4, characterized in that in the area of bending lines recesses are formed for the tabs. 5. Housing for part of an air duct system, in particular for receiving a fire damper, wherein side elements ( 1 , 2 ) from at least one flange ( 5 ) and an inner wall ( 9 ) with a top and / or bottom element ( 3 , 4 ) from at least a flange ( 12 ) and an inner wall ( 11 ) are connected, characterized in that a slot ( 10 ) is formed in an inner wall ( 9 or 11 ) and by at least one tab ( 15 , 16 ) of the other inner wall ( 11 , 9 ) is penetrated, which is bent approximately at right angles from the inner wall ( 11 or 9 ) and strikes from the outside on the inner wall ( 9 or 11 ). 6. Housing according to claim 6, characterized in that from the flange ( 5 , 12 ) an outer strip ( 8 , 13 ) is folded, which with an end edge ( 14 ) on the inner wall ( 9 ) on the other hand, the tab ( 15 , 16 ) strikes.