WO1995016295A1

WO1995016295A1 - Electric insert outlet

Info

Publication number: WO1995016295A1
Application number: PCT/DE1994/001522
Authority: WO
Inventors: Ludwig Schröder
Original assignee: Elso Gmbh Elektrotechnik
Priority date: 1993-12-09
Filing date: 1994-12-09
Publication date: 1995-06-15
Also published as: DE4342512C2; AU1271395A; DE4342512A1

Abstract

An electric insert outlet is disclosed for installing electric components, such as switches, plugs, distributors, etc. A universal insert outlet may be securely inserted into a mounting hole without elements to be screwed and/or clamped. The insert outlet (1) has supporting elements (8; 9) on diametrically opposed flat sections (5; 6) of the outer casing (2). The free ends of the supporting elements (8; 9) are linked to a curved pressure bar (10) with teeth (11). The front surface of the pressure bar extends up to the proximity of the supporting edge (7). Diametrically opposed pipes (13) are provided in a slanting section (3) of the casing, so that several insert inlets (1) to be mounted next to each other may be interconnected by an elastic intermediate piece. The insert inlet (1) is just pushed into the mounting hole for securing it into position and is form-fittingly clamped by the pressure bars (10) against the adjacent wall of the mounting hole.

Description

Electrical installation box

The invention relates to an electrical installation box for installing electrical assemblies, such as switches, plugs, distributors, etc., which can be used under plaster, in hollow walls, in window sill channels, in solid building materials, such as concrete, brick, wood or in sheet metal and plastic plates are.

Depending on the respective operating conditions, there are already a wide variety of versions of electrical installation boxes. The installation boxes generally have a round, pot-like body shape and are provided in the base area and in the outer jacket with predetermined openings or pipe connections - GM 74 33 794 - in order to insert electrical lines and cables into the interior of the box. The predetermined openings have a smaller wall thickness and / or are closed by wall parts which are connected to the box body by film hinges or webs which can be cut out. The simplest boxes of this type are used primarily for flush mounting or for electrical installations in solid brick and / or concrete masonry, the mounting box for receiving the electrical distributor, switch and plug assemblies being used in prepared mounting openings in the masonry and with the aid of a quickly setting building material , for example plaster can be attached. This method of installation is relatively time-consuming and costly and remains limited to the simplest installation boxes which can only be installed in solid wall elements.

For the installation of electrical assemblies in cavity walls, which were built in dry construction or in wall elements with a relatively thin wall thickness, single and multi-part cavity wall boxes are used, which are equipped with holding and tensioning elements for fastening the box - DE-OS 29 07 049; DE 39 07 335 AI; DE 40 19 431 AI; DE 40 20 677 AI; DE 40 20 678 AI and DE 41 37 421 AI.

These installation boxes often have a strongly rounded or beveled section between the outer jacket of the installation box and its base, which is used in the aforementioned manner for the arrangement of target openings for the cable entry, but also for receiving the holding and tensioning elements in their initial positions serves.

In order that the installation box can be fastened in a cavity wall, grooves are provided diametrically in the housing made of plastic, which are closed on the end side and here have a bore for receiving an adjusting and tensioning screw. The adjusting and tensioning screw is connected to the holding and tensioning element, which in its starting position is located in a separate receiving space on the can body. which is located or is articulated laterally on the edge of the can within the outer diameter of the can jacket, in order to ensure easy and assembly-correct insertion of the installation box into the prepared assembly opening of the cavity wall. By turning the adjusting and clamping screw, the holding and clamping element is unscrewed from its original position and brought to the end region of the installation box with a further screwing operation. The grooves in the can jacket serve to guide the holding and clamping elements. The holding and tensioning elements protruding from the can jacket now come to rest on the rear side of the hollow wall and brace the installation box against a radially projecting supporting edge which is provided on the open end face of the hollow wall box.

The most varied designs of cavity wall boxes all have the common disadvantage that they are relatively expensive to manufacture due to the assembly processes for the adjusting and tensioning screws and for the holding and clamping elements and that their assembly is very time-consuming due to the screwing process to be carried out is agile and therefore very cost-intensive.

In order to remedy this disadvantage, installation boxes have already been proposed which are equipped for their fastening with means for a clamp connection with the adjacent wall of an assembly opening in a wall element - DE 41 01 979 AI; DE 40 20 676 AI; DE 37 18 379 AI; GM 88 08 005.6; GM 87 11 217; GM 83 05 757.9 and GM 75 12 329.

From DE 41 01 979 AI a solution for an electrical cavity wall box is known, which is inserted from the front into the wall opening of the cavity wall and in addition to an end support flange with two laterally Arranged resilient holding members is equipped, which cooperate with guides that extend in the longitudinal direction, are arranged in the lateral surface of the cavity wall box. The resilient holding member is a spring bracket consisting of an inner leg and an outer leg, which in a preferred embodiment is designed as a U-shaped metal bracket. In its inactive inoperative position, the holding member is located within the guide of the hollow wall socket, which ensures that the installation socket is inserted into the wall opening in a manner appropriate to the assembly. The outer leg, which is provided with an external toothing, is brought into an effective position by loosening a holding member, in which it emerges from the side guides of the hollow wall box and the teeth attached to its outer surface into the adjacent boundary wall of the wall opening, the Assemble the installation position of the installation box in a position-securing manner.

The proposed means ensure a quick and secure fastening of the installation box in solid walls, in hollow walls and in wall elements with larger wall thicknesses. This box cannot be fixed in sheet metal and plastic walls with a relatively thinner wall thickness. When using separately manufactured resilient holding members made of metal, higher clamping forces for secure fastening are achieved, but at the same time the manufacturing costs increase due to the preassembly processes for completing the cavity wall socket.

In order to shorten the installation time of a cavity wall box in a wall opening and to reduce the number of holding members and the associated actuating elements for a clamp connection with the wall cutout, DE 40 20 676 AI proposes to use the holding members to arrange for the attachment of the mounting box on resilient legs of a common carrier. This carrier is preferably designed as a one-piece spring clip, which can be produced inexpensively as a stamped and bent part from a metallic material. The installation box itself is designed as a divided box body and has lateral guides in which the legs of the one-piece spring clip are used for wall mounting the box. In principle, this solution has the same disadvantages as described above.

Barb-like holding bristles arranged obliquely on the can jacket for masonry and cavity wall mounting of a built-in box are known from GM 87 11 217, the holding bristles being equipped with constrictions like film hinges. The proposed installation box is designed as a one-piece component and can be manufactured extremely inexpensively in the injection molding process. The disadvantage of this proposed solution is, on the one hand, that the installation box cannot be fastened in relatively thin wall elements. On the other hand, due to the design and arrangement of the holding bristles, no high clamping forces can be achieved, which are urgently required for the fastening of the mounting box in the wall openings.

For simple and at the same time secure fastening of a cavity wall box to a cavity wall panel, which can be of different thickness, a mounting box is proposed in DE 37 18 379 AI, which consists of a box body and a separate support flange. The support flange is axially movable and is connected to the socket body by fastening screws or spring elements. To fix the built-in box on a wall element, this acts axially adjustable bare support flange together with elastic locking members, which are arranged in segment-like flattened sections of the can wall in lamellar rows in axial rows. These locking elements have locking teeth facing one another at their end sections, which engage each other when the locking elements are loaded and deflected, and which form an abutment against which the supporting flange attached for fastening the mounting box is clamped with the interposition of the wall element.

The disadvantage of this solution is again that the installation box consists of several parts that have to be connected by screws during assembly. In addition, there is the risk that the counterforce exerted by the elastic locking members is not sufficient to securely fasten the mounting box in the wall elements and that the locking members will be overstretched when the outer support flange is screwed back so that they break off and no longer guarantee a firm hold of the mounting box most. This wall box cannot be installed in wall elements with relatively thin walls, such as metal and plastic plates.

The invention is therefore based on the object of providing means which, by simply inserting the installation box into the prepared assembly opening, ensure that the mounting box is secured in position and secured in position, and that the installation box is universally used in variously designed walls and wall elements. According to the invention, the object is achieved by the features characterized in claim 1. Further advantageous refinements of the invention result from subclaims 2 to 9.

The proposed fasteners in the form of the support elements provided on the outer casing of the mounting box and their end connection with an outwardly curved arcuate pressure web are designed and arranged such that they are elastically deformed when the mounting boxes are inserted into the prepared assembly opening, between the outer box casing and a stable, form-fitting clamping connection is made to the adjacent wall of the wall section via the fastening means. The sawtooth-like toothings formed on the outside of the pressure webs additionally engage in the material and / or in existing joints and pores of the adjacent wall sections and thus reinforce the clamping connection in a position-securing manner.

In order to be able to use the proposed installation box also for the installation of electrical assemblies in wall sections of relatively thin wall elements made of sheet metal or plastic, the free end of the pressure web is led into the edge area of the support rim formed on the open end face of the installation box. After inserting the installation box into the prepared assembly opening, the support elements, which are positioned at an acute angle to the outer casing of the box opposite to the installation direction, generate such high pressure forces that the wall of the wall element is braced with the support edge, and the installation box for the installation work to be carried out and the subsequent intended use of the introduced electrical assemblies is securely fixed. The box body and the fastening means arranged on the outer jacket are combined to form a one-piece component, as a result of which the prerequisites for extremely inexpensive manufacture of the built-in box have been created by means of injection molding processes. In the present installation box, there are no pre-assembly processes, for example to complete a box body made of plastic with separately manufactured fastening elements.

The installation box is fastened by simply pushing it into the prepared assembly opening, with a centered insertion through the obliquely formed jacket section between the cylindrical outer jacket and the can bottom and through the tab-like extensions of this jacket section, which simultaneously perform the function of a support element the installation box is guaranteed in the assembly opening.

The connection of several installation boxes to be installed in an adjacent arrangement by means of the connecting pieces to be inserted into the pipe socket on the bottom not only serve to secure the position of the installation boxes in terms of assembly, but at the same time make it possible to route the electrical lines within the installation boxes and to make line-side connections to the electrical modules without external jacket insulation .

The electrical lines to be installed are thus routed continuously in connection channels between the mounting boxes and are no longer exposed in the cavity wall or in other line channels or routings to be formed separately. In addition to the time saved by the clamp fastening when inserting The number of working hours is saved in the installation and subsequent installation and assembly work for the electrical assemblies.

In the case of the proposed installation box, all of the relatively time-consuming screwing processes for their completion or fastening are eliminated.

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings:

1 shows the front view of the electrical installation box made of plastic

Fig. 2 shows the view towards the can bottom

Fig. 3 shows the arrangement of two mounting boxes, which are connected by an intermediate piece

4 shows the intermediate piece according to FIG. 3

Fig. 5 shows the mounting arrangement of the mounting box in a wall element of small wall thickness

Fig. 6 assembly of the mounting box in a cavity wall

7 shows the built-in box inserted into a receiving opening of a brick or concrete masonry

8 shows the installation box inserted into the mounting opening of a metal or plastic plate The universally usable electrical installation box 1 shown in FIG. 1 has a round pot-shaped body which is provided with a supporting edge 7 on its open end face. At the bottom, an inclined jacket section 3 is provided, which connects the cylindrical outer jacket 2 to the bottom 4. In a diametrical arrangement, the outer casing 2 of the mounting box 1 has two flats 5 and 6, on which a plurality of resiliently designed support elements 8; 9 are formed one behind the other. The free ends of the support elements 8, 9 are connected to one another via an outwardly curved, likewise elastically designed pressure web 10, which extends in the longitudinal axis of the installation box 1 over the entire cylindrical outer jacket 2. The outer surface of the pressure web 10 has a sawtooth-shaped toothing 11 which, like the support elements 8; 9 is inclined against the installation direction of the installation box 1.

The free end face of the pressure web 10 is guided into the area of the supporting edge 7 in order to ensure that the installation box 1 can also be securely fastened in wall openings of relatively thin wall elements - FIG. 8. In addition, the free space between the end wall of the pressure web 10 and the support edge 7 ensures the clamping function of the pressure web 10 and the support elements 8; 9 which deform when the installation box 1 is inserted into the prepared mounting opening and, in cooperation with the adjacent wall of the mounting opening, ensures a positionally secure clamping connect.

Under the free ends of the pressure web 10, webs 18 are also provided, in which a blind hole 14, which serves to fasten the electrical modules to be installed, is made. The beveled jacket section 3 of the mounting box 1 and the tab-shaped extension of this section, which also serves as a support element 9, ensure that the mounting box can be inserted exactly centered into the prepared mounting opening. In the bottom 4 and in the obliquely formed jacket section 3, there are provided predetermined wall openings 17 in their position. The wall openings 17 are closed in a known manner by cut-out wall parts which are connected to the can body by film hinges or webs.

In the area of the obliquely formed jacket section 3 there are pipe sockets 13 offset by 90 ° to the pressure bars 10. These pipe sockets 13 are fitted in such a way that they do not exceed the external dimensions of the can body. The through opening 16 of the pipe socket 13 is in turn closed by a cut-out wall part 15.

As can be seen from FIG. 3, a plurality of electrical installation boxes 1, which are to be arranged in an adjacent arrangement in the present example, are connected to one another via an intermediate piece 19 which is received by the pipe socket 13. This intermediate piece 19 - Fig. 4 - is a simple cylindrical body which is provided with a left and right stop shoulder 20; 21. The stop shoulders 20, 21 are with bevels 23; 24 to facilitate the insertion of the intermediate piece 19 into the pipe socket 13, the left and right stop shoulders 20; 21 engaging behind the end faces of the pipe socket 13 formed in the installation box 1 and thus establishing a firm connection between the adjacent ones Manufacture installation boxes 1. As shown in FIGS. 5 to 8, the installation box 1 according to the invention is inserted from the front into the prepared assembly opening of a wall element 24 or a cavity wall 25. In cooperation with the adjacent wall section of the respective assembly opening, the elastic support elements 8; 9 and the likewise elastically designed pressure web 10 are deformed and a secure clamp fastening is produced. In the case of assembly openings in massive wall elements 26 of a brick or concrete masonry, as can be seen from FIG. 7, the entire length of the pressure web 10 lies against the adjacent wall of the assembly opening.

REFERENCE NUMBERS

1 installation box

2 outer sheath

3 jacket section

4 bottom

5 flattening

6 flattening

7 support edge

8 support element

9 support element

10 pressure bar

11 gearing

12 end face

13 pipe sockets

14 blind hole

15 wall part

16 Implementation opening

17 wall opening

18 bridge

19 Intermediate piece 0 stop shoulder 1 stop shoulder 2 ramp slope 3 ramp slope 4 wall element 5 cavity wall 6 concrete / brick masonry 7 wall element

Claims

claims

Electrical installation box for the installation of electrical assemblies, such as distributors, switches, plugs, etc. in the form of a round pot-shaped body which can be inserted from the front into a prepared mounting opening of a wall element and which has a support edge on its open end face and the bottom of which an inclined outer casing section is connected to the outer casing, the outer casing having two diametrically opposed flats on which clamping elements for fixing the installation box in the assembly opening are formed, while the bottom and the inclined casing section of the outer casing for the passage of electrical connecting lines have n-openings, which are closed by cut-out wall parts fastened by means of film hinges and webs, and in the outer jacket also at least two, likewise the passage of electrical ones Pipes serving as lines are formed, characterized in that support elements (8; 9) are formed on the diametrically opposed flats (5; 6) of the outer casing (2) of the installation box (1), the free ends of which are connected to a pressure web ( 10) are connected, which is brought up to the support edge (7) with its front end face (12), and in the area of the obliquely formed jacket sections (3) in a diametrical arrangement n-pipe socket (13), whose central axes parallel to The bottom (4) of the installation box (1) extends so that two installation boxes (1) to be arranged in an adjacent arrangement can be firmly connected to one another via an elastic intermediate piece (19).

2. Installation box according to claim 1, characterized gekennzeich¬ net that the support elements (8; 9) and the Druck¬ web (10) are resilient, the pressure web (10) is curved outward in an arc shape and on its outer surface a toothing ( 11).

3. Installation box according to claim 1 and 2, characterized ge indicates that the arcuate Druck¬ webs (10) over the entire length of the cylindrical outer shell (2) and the support elements (8; 9) against the direction of insertion the installation box is inclined at an acute angle to the cylindrical outer jacket (2).

4. Installation box according to one of claims 1 to 3, characterized in that the toothing (11) has a sawtooth-shaped profile directed against the installation direction.

5. Installation box according to one of claims 1 to 4, characterized in that the pipe socket (13) offset by 90 ° to the pressure bars (10) an¬ arranged and their through openings (16) by cut-out wall parts (15) are verschlos¬ sen, the external dimensions of the pipe socket (13) not exceeding the external dimensions of the installation box (1).

6. Installation box according to one of claims 1 to 5, characterized in that the support element (9) is a tab-shaped extension of the beveled jacket section (3).

7. Installation box according to one of claims 1 to 6, characterized in that beneath the free, front end portion of the pressure webs (10) on the support edge (7) adjacent webs (18) on the flats (5; 6) are formed.

8. Installation box according to claim 7, characterized gekennzeich¬ net that in the webs (18) from the free end face of the support edge (7) outgoing blind hole (14) is provided.

9. Installation box according to one of claims 1 to 8, characterized in that the intermediate piece (19) is a cylindrical body which has left and right, each with a Auflauf¬ bevel (22; 23) provided stop shoulder (20; 21) .