WO2002037633A2

WO2002037633A2 - Embedded box for a tool-free mounting

Info

Publication number: WO2002037633A2
Application number: PCT/EP2001/012624
Authority: WO
Inventors: Friedel Wasserfuhr; Thomas Birkholz; Holger Spelsberg; Alfred Vrieling
Original assignee: Günther Spelsberg GmbH & Co. KG
Priority date: 2000-11-03
Filing date: 2001-10-31
Publication date: 2002-05-10
Also published as: DE10054662A1; WO2002037633A3; DE10054662C2

Abstract

The invention relates to an embedded box (10), especially for accommodating electric installation devices (37) that should be fixed inside an accommodating part (50). To this end, the embedded box (10) has to have a tight horizontal (46) and vertical (47) fit once mounted inside the accommodating part (50). In order to mount this embedded box (10) inside the accommodating part (50) quickly, securely and without the use of tools, the invention provides that additional fixing elements (14) are placed on the lateral walls (31) of the embedded box (10), which effect an indirect or direct frictional engagement with the accommodating part (50). This enables the embedded box (10), with a direct frictional engagement, to be mounted alone by pressing it into the accommodating part (50). In the case of an indirect frictional engagement, the embedded box (10), once pressed inside the accommodating part (50), is secured by a supplementary reinforcing element (40) that also enables the horizontal (46) tight fit inside the accommodating part (50). This reinforcing element (40) is solely removed from a release position (44) and brought into a detent position (45) by a tilting or insertion motion that does not require the use of tools.

Description

Installation box for tool-free installation

The invention relates to a mounting box, in particular for accommodating electrical installation devices, which can be attached in a receiving part, in accordance with the type specified in the preamble of claim 1. These mounting boxes are fastened to or in a receiving part by a plug-in assembly. For this purpose, they are inserted into the receiving part through an opening on the viewing side. After the installation of the installation box in the receptacle has been completed, the installation box must have a firm horizontal and vertical fit in the receptacle part in order to comply with the NDE standards applicable in Germany.

In the known box of the type mentioned in the preamble of claim 1, a horizontally fixed fit of the mounting box in the receiving part is realized by laterally protruding fastening clips. These wedge-shaped fastening clips are first moved laterally into the interior of the can by pushing the installation box into the opening of the receiving part, in order to then traverse a holding projection of the receiving part by manually pushing them out of the inside of the can. By means of these fastening clips, the known installation box is positively secured in the receiving part against vertical pulling out of the receiving part. A disadvantage of the known installation box is that the fastening clips are additionally manually operated from the inside after the installation box has been pressed in must be pressed out and that no horizontally fixed fit of the installation box is achieved in the receiving part. For this reason, the known can does not meet the NDE standard applicable in Germany.

In a further known installation box, both a vertically fixed and a horizontally fixed seat is achieved after insertion into the receptacle by pressing two hooks located on the side walls of the receptacles by means of corresponding screws on the receptacle. For this purpose, the hooks are provided with corresponding threaded bushings, which interact with the screws mentioned above. The hooks are initially in the starting part when the mounting box is inserted into the receiving part, in which they are each arranged in a side wall of the mounting box and do not protrude from the side wall. By turning the screws with the help of a tool, the hooks are first turned sideways from their starting position by about 90 ° and now protrude as far as possible from their side walls. As the screws continue to rotate, the hooks are slowly moved against the receiving part until they finally touch it. So that this installation box is not simply pulled into the receiving part, there are appropriate stops on it. A disadvantage of the installation box mentioned is the time-consuming assembly, which is also only possible with the aid of tools. In addition, on the one hand, the installation box or the receiving part can be destroyed by tightening the screws mentioned too much, or, on the other hand, if the screws are tightened too weakly, the mounting box is not properly or vertically fastened in the receiving part.

The invention has for its object to develop an inexpensive, easy-to-use installation box of the type mentioned in the preamble of claim 1, which can be assembled easily and without tools. Of course, the installation box must also meet the applicable NDE standards. This is according to the invention achieved the measures listed in the characterizing part of claim 1, which have the following special meaning.

In the invention, the mounting box is secured vertically in the receiving part by the lateral fastening clips, as is known. The special feature of the invention now consists in the additional locking elements, which non-positively secure the mounting box horizontally in the receiving part. According to the invention, there are two ways of realizing the force fit between a locking element and a holding projection of the receiving part, namely either by means of a direct force fit or by means of an indirect force fit. In the event of an immediate frictional connection, the locking element is in such a position that it touches a holding projection by pressing the installation box into the receiving part and thus independently forms the direct frictional connection. The second possibility, the indirect frictional connection, is brought about by an additional reinforcement element, the locking element being pressed against a retaining projection only after assembly by the additional reinforcement element. Both the direct and the indirect frictional connection between the locking element and the retaining projection secures the installation box in a horizontally fixed seat in the receiving part. One advantage is that the entire installation of the installation box is carried out without tools in order to achieve a horizontally and vertically firm fit in the receiving part. In addition, the assembly is carried out by simply inserting the installation box into the receptacle. Only in the second possibility of the directly generated frictional connection, the ner strengthening element has to be attached by a simple folding or plug-in movement in order to achieve the horizontally firm fit of the installation box. It is technically impossible to destroy the installation box or the receptacle during assembly. Disadvantageously, an identical installation box can be adapted to different holding projections and thus different receiving parts by using different locking elements and fastening clips. On the one hand, this leads to a reduction in production costs, since larger quantities can be produced from the identical installation box, and on the other hand, the storage costs are also reduced because different variants of the installation box do not have to be stored.

Further measures and advantages of the invention result from the subclaims, the following description and the drawings. The invention is shown in various exemplary embodiments in the drawings. Show it:

1 is a perspective view of an installation box according to the invention before assembly in a receiving part with raised reinforcing elements in release positions,

2 is a perspective view of a mounting bracket and a locking element, which are arranged in one piece to form a securing element,

3a shows an enlarged section through an installed installation box in

Height of the locking element, the locking element being supported with two edges on a retaining projection of the receiving part,

3b, like Fig. 3a, with another locking element, namely consisting of a force-loaded surface that is pressed against a retaining projection of the receiving part, 3c, like Fig. 3a and 3b, with another locking element, namely with only one tip or a pointed edge that is pressed against the holding projection of the receiving part,

4a enlarged sections of a partially assembled mounting box in a receiving part with a folded-up reinforcing element in a release position,

4b, like Fig. 4a, only that the reinforcing element is depressed and is in a locking position,

5a is a top view of the installation box according to the invention with raised reinforcement elements,

5b shows a section Vb-Vb through the installation box in FIG. 5a, with the reinforcement elements in the upright position,

6 in side view, a mounting box and a receiving part shortly before assembly with raised reinforcing elements,

1, like FIG. 6, but with a different mounting box and a different receiving part, the mounting box having already been pressed into the receiving part, but the reinforcing elements still being folded up,

8, like FIG. 6, the fully assembled mounting box in the receiving part, the mounting box having a vertically and horizontally fixed fit in the receiving part, Fig. 9 in plan view, a mounting box according to the invention for only one

Installation device,

Fig. 10 in plan view like Fig. 9, but a mounting box for two

Installation devices,

Fig. 11, like Fig. 9 and 10, a mounting box for three installation devices and

Fig. 12, like Fig. 9, 10 and 11 with a mounting box for a total of four

Installation devices.

The installation box 10 according to the invention is used in particular for accommodating various electrical installation devices 37, which can be attached or fastened to a receiving part 50 having different holding projections 55. For this purpose, a mounting bracket ϊ 1 is arranged on the mounting box 10 at least on a side wall 31, which projects resiliently from the side wall 31. This fastening clip 11 forms a snap connection with at least one holding projection 55, in which it automatically travels the holding projection 55 after installation of the mounting box 10 in the receiving part 50 by an acting spring force and interacts positively with the holding projection 55, as a result of which the mounting box 10 counteracts vertical 46 Pulling out of the receiving part 50 is secured. The installation box 10 furthermore has at least one stop 34, which in an assembled state of the installation box 10 is supported against the receiving part 50 and causes a vertically fixed seat 46 of the installation box 10. Up to this step, the installation of the installation box 10 consists only of simply pressing into the receiving part 50. Thus, the ^" vertically fixed seat 46 of the installation box 10 is achieved completely independently by the lateral extension of the fastening clamps 11. It should be mentioned that the fastening clamps 1 1 by pressing the installation box 10 into the receiving part 50 beforehand into the interior of the box are pressed in order to then independently move out of the interior of the can behind a retaining projection 55 as soon as the installation box 10 cannot be pressed further into the receiving part 50 by its stops 34. 6, 7, 8 show the individual assembly steps of the installation box 10 (with a reinforcing element 40, ie the installation box 10 is secured by means of an indirect non-positive connection). The vertically fixed seat 46 is understood (see FIG. 6) that the installation box 10 cannot be removed from the receiving part 50 by pulling strongly against its installation direction. The vertical direction is indicated in FIG. 6 by a corresponding arrow 46.

On the mounting box 10 according to the invention, at least one locking element 14 is fixedly arranged on a side wall 31, that either the mounting element 14 touches a holding projection 55 by the mounting of the mounting box 10 and independently forms a direct frictional connection to it, or that after mounting only by an additional Reinforcing element 40, the locking element 14 forms an indirect frictional connection to a retaining projection 55, in which the reinforcing element 40 presses the locking element 14 against the retaining projection 55 by a single folding or plug-in movement. Due to the directly or indirectly generated frictional connection between the locking element 14 and the holding projection 55, the mounting box 10 is held in a horizontally fixed seat 47 in the receiving part 50. The fastening of the installation box 10 achieved in this way in the receiving part 50 corresponds to the valid VDE standards. The non-positive connection generated on the one hand and the non-positive connection generated on the other hand represent two different possibilities for securing the installation box 10 according to the invention horizontally 47 in the receiving part 50.

When the installation box 10 is secured by the direct frictional connection, the installation box 10 is simply pressed into the receiving part 50 and is thus automatically secured against vertical 46 and horizontal 47 displacement in the receiving part 50. For this purpose, the locking element 14 is biased and is only by simply pushing the mounting box 10 into the receiving part 50 pressed against the corresponding holding projection 55. The required pretension in the locking element 14 is achieved by a special shape of the locking element 14. 2 and 4a, a corresponding arch 20 is shown on the locking element 14, by means of which a pretension is generated. The prevailing prestress can be influenced by specifying the radius of curvature of the arc 20. In the exemplary embodiments shown, the bend 20 of the locking element 14 is widened by the installation of the installation box 10. Thus, the force required for the frictional connection acts in the direction of the side wall 31 on which the locking element is attached. It is also conceivable that at a z. B. differently designed retaining projection 55, the arc of the locking element 14 is compressed by the assembly. In this case, the force generated then acts in the opposite direction than before, ie away from the side wall 31.

Optionally, the installation box 10 is secured by an indirect frictional connection in the receiving part 50. Here, the installation box 10 is still laterally displaceable in the receiving part 50 in order to adapt the position of the installation box 10 to the conditions during installation. It is often necessary to correct the position of the installation box 10 in the receiving part 50 a little. The installation box 10 is secured in the desired horizontal end position 47 in the receiving part 50 by a simple and one-time folding or plug-in movement of the reinforcing element 40.

Different locking elements 14 and / or fastening clips 11 can advantageously be used on an identical installation box 10 for different holding projections 55. As a result, only an identical installation box 10 needs to be produced, which can then be adapted to the respective installation situation of the receiving part 50 and the holding projections 55 by the various fixing elements 14 and fastening clips 11. Significant manufacturing costs can thus be saved. In order that the installation box 10 obtains an optimal hold in the receptacle 50, at least two locking elements 14 are arranged symmetrically to a longitudinal axis 48 of the installation box 10 on two opposite side walls 31.

The resulting indirect or direct frictional connection between a locking element 14 and a retaining projection 55 can be realized by the different design of the locking element 14. So z. B. the locking element 14 in the assembled state of the mounting box 10 with at least one force-loaded tip 17 pressed against the retaining projection 55. In the assembled state of the installation box 10, the fixing element 14 can also press against the retaining projection 55 with at least one force-loaded edge 16. It is also conceivable that the locking element 14 is pressed against the holding projection 55 with two force-loaded edges 16 in the assembled state of the installation box 10. Due to the last-mentioned force-loaded tips 17 or force-loaded edges 16, there is a large surface pressure in the area of contact of the fixing element 14 with the holding projection 55. This not only enables a positive connection, but also a positive connection by changing the surface of the holding projection 55. However, this is not absolutely necessary, since it depends on the nature and the material of the receiving part 50 or the holding projection 55. So it can be assumed that z. B. with a retaining projection 55 made of PVC, the force-loaded tips 17 or edges 16 work more easily into the surface than z. B. with a retaining projection 55 made of aluminum or metal. In any case, an additionally generated positive connection between the fixing element 14 and the holding projection 55 increases the horizontally fixed seat 47 of the mounting box 10 in the receiving part 50. The different edges 16 and tips 17 are shown in FIGS. 3a and 3c.

In the assembled state of the installation box 10, the fixing element 14 can also advantageously be provided with at least one force-loaded surface 18 against a holding device. Press jump 55 and cause a high static friction between the locking element 14 and the holding projection 55. This variant is shown in Fig. 3b. In order that a high static friction is generated between the two elements mentioned, a friction lining 19 can also be attached to the force-loaded surface 18. The surface of the friction lining 19 does not necessarily have to resemble the surface of a lubricating gel or an arrow, but a high static friction between the two elements mentioned can be achieved simply by a clever combination of materials. When using the force-loaded surface 18, it can rather be assumed that no positive connection is produced by the existing non-positive connection.

The locking element 14 is advantageously made of metal at least at one or a few force-loaded points 16, 17, 18 at which it presses against a retaining projection 55. In the variants of the force-loaded tip 17 or the force-loaded edge 16, increased wear at the contact points 16, 17 can thus be avoided. In addition, the last-mentioned measure is more likely to bring about an additional form fit to the existing force fit.

It is also advantageous if the entire locking element 14 consists of metal. As a result, a direct frictional connection can be achieved in a particularly simple manner by the shape of the locking element 14. 2 shows a possible variant of the shape of the locking element 14. As already mentioned, a direct adhesion of the locking element 14 to a holding projection 55 can be determined by the shape of the arch 20. It goes without saying that the locking element 14 is designed differently depending on the receiving part 50 or retaining projections 55.

In order to arrange the locking element 14 on a side wall 31 of the installation box 10 simply and securely, a direct snap connection can be provided. For this purpose, a corresponding snap tab 23 on the locking element 14 is shown schematically in FIG. 2.

It is particularly advantageous if a fastening clip 11 and a locking element 14 are formed in one piece and form a securing element 25. This securing element 25 is shown individually in FIG. 2. 4a, the mentioned securing element 25, attached to the installation box 10, is shown. This not only saves costs in the manufacture of the one-piece securing element 25, but also in the attachment of only one element to the installation box 10.

According to the one-piece securing element 25 can consist of metal. As a result, there is no wear on the fastening clip 11 or the locking element 14. In addition, the one-piece securing element 25 made of metal holds the mounting box 10 firmly in the receiving part 50 even under high forces acting on it. Possible temperature fluctuations also do not influence the vertically fixed 46 and horizontally fixed 47 seat of the installation box 10.

The one-piece securing element 25 can be positively and firmly connected to the installation box 10 by a direct snap connection. A tool-free attachment of the securing element 25 to a side wall 31 of the installation box 10 is thus possible. The snap tab 23 required for this is shown in FIG. 4. So that the one-piece securing element 25 is also firmly attached to the side wall 31 in the area of the fixing element 14, a guide web 22 interacts with a corresponding groove in the installation box 10. The position of the guide web 22 can be seen from FIG. 2. The interaction of the guide web 22 with the groove in the side wall 31 can be seen in FIG. 4a. A fastening of the one-piece securing element 25 by corresponding holes 24 is indicated in FIGS. 2 and 4a. The securing element 25 could be welded to the side wall 31 through these holes 24.

In order to facilitate the manufacture of the one-piece securing element 25, the fastening clip 11 and the fixing element 14 in the securing element 25 are arranged laterally offset from one another. The locking element 14 shown in FIG. 2 does not necessarily have to extend up to an arc 26, but it can also be considerably shorter if it is not constructed in one piece with a fastening clip 11.

According to the invention, at least two securing elements 25 are arranged in pairs symmetrically to the longitudinal axis 48 of the installation box 10 on two opposite side walls 31. This measure guarantees a vertical 46 and horizontal 47 firm fit in the receiving part 50 of the installation box 10. In addition, the mounting box 10 can be constructed or constructed symmetrically. 9 to 12 show different attachment variants of securing elements 25 arranged in pairs for mounting boxes 10 of different sizes. The arrangement of securing elements 25 shown in pairs in FIGS. 9 to 12 are only to be understood as examples. In this way, additional securing elements 25 can also be attached to the mounting box 10, in part at higher loads. The number of securing elements 25 used can also be reduced with a lower load on the installation box 10. 9 and 10, the built-in installation devices 37 are shown schematically. It goes without saying that a different arrangement of the securing elements 25 on the side walls 31 is permissible, but then the advantages mentioned due to the symmetrical arrangement do not come into play.

The reinforcing element 40 is advantageously connected to the installation box 10 via a film hinge 42. Thus, this reinforcing element 40 in one Manufacturing process are made with the installation box 10. It is also captively attached to it.

The reinforcing element 40 can on the one hand have a release position 44, in which it does not form a non-positive connection between the fixing element 14 and the holding projection 55, and on the other hand it can have a locking position 45, wherein there is an indirect non-positive connection between the fixing element 14 and the holding projection 55. 1, 4a, 5a, 5b, 6 and 7, the reinforcing element 40 is shown in a release position 44. 4b and 8, the reinforcing element 40 is shown in its locking position 45. 6, 7 and 8, the assembly of the installation box 10 according to the invention is shown in the different installation steps. 3a, 3b, and 3c, the reinforcing element 40 can be seen schematically in its locking position 45. In addition, the mode of operation of the reinforcing element 40 is clearly shown in these figures. This is because it creates the indirect frictional connection for the horizontally 47 firm seat of the installation box 10, in which it presses, on the one hand, with wedge-shaped webs 41 against a leg of a U-shaped profile 56, which forms a retaining projection 55, and, on the other hand, the locking element 14 against another Legs of the U-shaped profile 56 presses. Due to their wedge-like shape, the webs 41 of the reinforcing element 40 facilitate the attachment of the reinforcing element 40 by a folding or plug-in movement in its locking position 45.

6, the installation box 10 is pushed into an opening 54 of the receiving part 50. By simply pushing the installation box 10 vertically 46 into the receiving part 50, the wedge-shaped fastening clips 11 are pressed into the inside of the box through the side walls 31. Only when the installation box has reached the necessary depth in the receiving part 50, the fastening elements 11 snap out of the side walls 31 by the acting spring force and thus drive behind the holding projections 55. This is shown in FIG. 7. So that the installation box 10 is not completely pressed into the receiving part 50 the mounting box 10 via corresponding stops 34. In FIGS. 6 and 8, these stops 34 are attached to a lateral upper edge 33 of the mounting box 10 and cooperate with a depression 57 in the holding projection 55. In contrast, the stops 34 in FIG. 7 are arranged on the bottom 32 of the installation box 10. These interact with the bottom 52 of the receiving part 50. 4a and 4b, the installation box 10 could, for. B. also have direct contact to the bottom 52 of the receiving part 50 through their bottom or through their bottom-side stops 34. However, there could also be a sufficient distance between the bottom of the installation box 10 and the bottom 52 of the receiving part 50 in order to allow z. B. To lay cables. For this purpose, corresponding stops 34 are arranged on the lateral upper edge 33 of the installation box 10.

Now that the installation box 10 has been pressed into the receiving part 50, the two different possibilities of the invention, namely the direct adhesion and the indirect adhesion, come into play. With the possibility of direct frictional engagement, a horizontally 47 and vertically 46 fixed fit of the installation box 10 is thus achieved. This means that the installation box 10 can subsequently no longer be horizontally displaced 47 in the receiving part 50. In contrast to this, the installation box 10 can still be moved horizontally 47 in the receiving part 50 with the possibility of indirect adhesion. This is particularly advantageous if, for example, the installation box 10 is to be pushed with its end wall 30 against an existing cover or the end of the opening 34 of the receiving part 50. This possibility further facilitates the assembly of the embedding box 10. In order to secure the installation box 10 by an indirect frictional connection, the reinforcing element 40 must be brought into its locking position 45. In the present exemplary embodiments, this is done by simply folding the reinforcing element 40 by less than 90 °. As with a comparable plug-in movement, no tools are required for this folding movement. A mounting box 10 held in this way is shown in its receiving part 50 in FIG. 8. In the figures shown, a special Position of the cables or installation devices normally present is dispensed with. Normally, the installation devices 37 would by cables, which through the cable openings 35 in z. B. the end walls 30 are connected.

Advantageously, even the reinforcing element 40 is non-positively secured in its locking position 45 by the adjusting element 14. For this purpose, as shown in FIGS. 2 and 4a, a securing tab 21 can be attached to the locking element 14. Likewise, the reinforcing element 40 can be positively secured in its locking position 45 by the locking element 14. For this purpose, a corresponding receptacle 43 must be available for the securing tab 21. Such a receptacle 43 is shown in FIG. 1. The positive or non-positive securing of the reinforcing element 40 prevents it from being able to move independently from its locking position and thus the mounting box 10 can be moved horizontally 47 in the receiving part 50.

A particular advantage can be seen in the fact that the installation box 10 can be mounted in the receiving part 50 by the arrangement of the fastening clip 11 and the locking elements 14 on the side walls 31 with previously installed installation devices 37. Thus, the complete installation of the devices 37 can be carried out before the installation of the installation box 10 in the receiving part 50.

Pulling surfaces 13 are arranged on the fastening clamps 11 and serve for the non-destructive removal of the installation box 10 from the receiving part 50. Thus, the installation box 10 can be easily removed from the receiving part 50 by pulling back the fastening clips 11 by means of the pulling surfaces 13. If the embedding box 10 is secured in the receiving part 50 via an indirect frictional connection, the reinforcing element 40 must first be moved from its locking position 45 into its release position 44. The receiving part 50 can consist of a cable duct. The holding projections 55 of the receiving part 50 can also be U-shaped. But it is also conceivable that the holding projections 55 are L-shaped. For this purpose, the locking element 14 would, however, have to have a shape other than that shown in the figures.

It remains to be noted that the embodiments shown here are only exemplary implementations of the inventions. However, this is not limited to this. It goes without saying that the illustrated elements and components of the invention can also be present in other embodiments and constructions which have properties similar to those described here.

LIST OF REFERENCE NUMBERS

Installation box Fastening bracket Fastening surface Tensioning surface Locking element Angled locking surfaces Force-loaded edge Force-loaded tip or pointed edge Force-loaded surface Friction lining to 18 sheets of 14 securing tabs on 14 guide bar Snap-on tab of 14 holes Securing element sheet of 25 or 11 snap-on tabs of 25 or 11

Front wall, side wall, floor, upper edge, stop, cable openings, standardized area for installation devices, installation device Screws for installation devices

Recording for 38

Reinforcing element wedge-shaped web

film hinge

Holder for snap clip 21

release position

locking position

Vertical arrow

Arrow in the horizontal direction

longitudinal axis

Receiving part / (cable duct)

long side

ground

front

opening

retaining projection

U-profile

Sink from U-profile

Claims

claims:

1. installation box (10), in particular for accommodating electrical installation devices (37), which can be fastened in a receiving part (50) having retaining projections (55),

with at least one fastening clip (11) which resiliently protrudes from a side wall (31) of the installation box (10), and

the fastening clip (11) forms a snap connection with at least one holding projection (55) by automatically traversing the holding projection (55) after an installation of the installation box (10) in the receiving part (50) by an acting spring force and with the holding projection (55) in a form-fitting manner cooperates, whereby the mounting box (10) is secured against vertical (46) pulling out of the receiving part (50), and

the mounting box (10) has at least one stop (34) which, when the mounting box (10) is in an assembled state, is supported against the receiving part (50) and causes the mounting box (10) to be firmly seated vertically (46),

characterized,

that at least one locking element (14) is fixedly arranged on a side wall (31) of the installation box (10), and

that either the mounting element (14) touches a holding projection (55) and automatically forms a direct frictional connection to it by the installation of the mounting box (10), or that after assembly, the locking element (14) forms an indirect frictional connection to a holding projection (55) only by means of a reinforcing element (40), in that the reinforcing element (40) by means of a one-time folding or plug-in movement, the locking element (14) on the retaining projection (55 ) presses

wherein the directly or indirectly generated frictional connection between the locking element (14) and the retaining projection (55) holds the mounting box (10) in a horizontal (47) fixed seat in the receiving part (50).

2. Installation box (10) according to claim 1, characterized in that different locking elements (14) and fastening clips (11) on an identical installation box (10) for different holding projections (55) are to be arranged.

3. Installation box (10) according to claim 1 or 2, characterized in that at least two locking elements (14) symmetrically to a longitudinal axis (48) of the installation box (10) on two opposite side walls (31) of the installation box (10) arranged are.

4. Installation box (10) according to one of claims 1 to 3, characterized in that the locking element (14) in the assembled state of the installation box (10) with at least one force-loaded tip (17) presses against a retaining projection (55).

5. Installation box (10) according to one of claims 1 to 3, characterized in that the locking element (14) in the assembled state of the installation box (10) with at least one force-loaded edge (16) presses against a retaining projection (55).

6. Installation box (10) according to one of claims 1 to 3, characterized in that the locking element (14) in the assembled state of the installation box (10) with two force-loaded edges (17) presses against a retaining projection (55).

7. Installation box (10) according to one of claims 1 to 3, characterized in that the locking element (14) in the assembled state of the installation box (10) with at least one force-loaded surface (18) presses against a retaining projection (55) and high static friction between the locking element (14) and the holding projection (55).

8. Installation box (10) according to one of claims 1 to 7, characterized in that the locking element (14) at least at one or some force-loaded contact points (16, 17, 18) at which it presses against a holding projection (55) Metal.

9. Installation box (10) according to one of claims 1 to 8, characterized in that the entire locking element (14) consists of metal.

10. Installation box (10) according to one of claims 1 to 9, characterized in that the locking element (14) is firmly connected to the installation box (10) by a direct snap connection.

11. Installation box (10) according to one of claims 1 to 10, characterized in that in each case a mounting bracket (11) and a locking element (14) are integrally formed and form a securing element (25).

12. Installation box (10) according to claim 11, characterized in that the one-piece securing element (25) consists of metal.

13. Installation box (10) according to claim 1 1 or 12, characterized in that the one-piece securing element (25) is positively and firmly connected by a direct snap connection with the installation box (10).

14. Installation box (10) according to any one of claims 1 1 to 13, characterized in that the fastening clip (11) and the locking element (14) in a securing element (25) are arranged laterally offset from one another.

15. Installation box (10) according to one of claims 11 to 13, characterized in that at least two securing elements (25) symmetrically to the longitudinal axis (48) of the installation box (10) on two opposite side walls (31) are arranged in pairs.

16. Installation box (10) according to one of claims 1 to 15, characterized in that the reinforcing element (40) via a film hinge (42) is connected to the installation box (10).

17. Installation box (10) according to one of claims 1 to 16, characterized in that the reinforcing element (40) on the one hand has a release position (44) in which it forms no non-positive connection between the locking element (14) and the holding projection (55) and on the other hand has a locking position (45), there being an indirect non-positive connection between the locking element (14) and the holding projection (55).

18. Installation box (10) according to claim 17, characterized in that the locking position (45) of the reinforcing element (40) is non-positively secured by the locking element (14).

19. Installation box (10) according to claim 17, characterized in that the locking position (45) of the reinforcing element (40) is positively secured by the locking element (14).

20. Installation box (10) according to one of claims 1 to 29, characterized in that by the arrangement of the fastening clips (11) and the locking elements (14) on the side walls (31), the installation box (10) with previously installed installation devices (37 ) can be mounted in the receiving part (50).

21. Installation box (10) according to one of claims 1 to 20, characterized in that the installation box (10) can be removed from the receiving part (50) non-destructively by a pulling surface (13) on the fastening clips (11).

22. Emba box (10) according to any one of claims 1 to 21, characterized in that the receiving part (50) consists of a cable duct.

23. Installation box (10) according to one of claims 1 to 22, characterized in that the holding projections (55) are U-shaped.

24. Installation box (10) according to one of claims 1 to 22, characterized in that the holding projections (55) are L-shaped.