DE29503788U1 - Electrical installation system for plug-in sockets - Google Patents

Description

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DESCRIPTION

Electrical installation system for plug-in sockets

The invention relates to an electrical installation system with the features in the preamble of the main claim.

Such a system is known from DE-OS 23 58 895. It consists of a cable duct and one or more sockets that can be detachably attached to any slot without installation work. The cable duct has several longitudinal electrical conductors that are housed in recesses that are open on the sides. Locking and pressure lips are attached to the opening edges of the recesses to prevent direct contact with the electrical conductors. The socket has several contact pins or blades that grip into the recesses during assembly and contact the conductors. The conductors are designed as spring sleeves. The contact pins are rigidly attached to the socket and plunge into the recesses in a straight movement when the socket is attached. Spring clips are provided to fix the socket to the cable duct; these are operated and locked if necessary using a rotating disk.

In this known embodiment, electrical safety is not fully ensured because children can insert electrically conductive objects relatively easily through the side opening of the recesses. In addition, this arrangement is susceptible to contamination and can cause problems with electrical contact safety. The conductor shape can also cause problems with electrical contact safety. I

Another electrical installation system is known from DE-OS 23 41 429. Here the cable duct is designed as a closed box construction, which only has access openings for the socket that can be broken out in some places. The socket has several rotatably arranged contact pins that can reach into hidden recesses inside the duct. The socket is attached using screws. With this design it is not possible to attach the socket to any place in the cable duct. In addition, the electrical conductors are freely accessible through the broken openings in the duct when the socket is removed, which means a considerable risk of accidents. Attaching the sockets using screws is also unfavorable.

Another electrical installation system is known from DE-OS 19 32 042, which has an access point open at the bottom for electrical contact blades, which are simply plugged in. Here, electrical safety is in no way guaranteed. In addition, there is no secure fastening for the socket.

It is therefore the object of the present invention to demonstrate a better electrical installation system.

The invention solves this problem with the features in the main claim.

The electrical installation system according to the invention advantageously combines a high level of accident safety with a high level of electrical contact security. The electrical contact pins serve both for the power transmission and for the positive fastening and locking of the box to the cable duct. This also ensures that when the electrical connection is closed, the box is also securely

is fixed. Conversely, the box can only be removed when the electrical connection is released. To ensure the fastening and relieve the contact pins, the box is also positively hung on the cable duct.

For accident prevention and electrical safety, it is advantageous that the electrical conductors are concealed and protected in receiving shafts that are only accessible from below. The access can also be covered by locking lips to prevent dust, contact and splash water. Pressure lips in the receiving shafts ensure that the conductors are securely fixed in the shaft walls and also that the contact pins or blades are pressed reliably and securely onto the electrical conductors, which are preferably designed as flat conductors. The locking and pressure lips are only pressed open by the contact pins entering.

There is also an empty space in the cable duct which, if the upper part of the duct is designed to be hinged or removable, can be used to accommodate bus, telephone, antenna or loudspeaker cables.

By using transition pieces on flexible (round) cables, all problems such as inside/outside corners, door bypasses, etc. can be easily solved.

For corners of all angles, we recommend using a flexible middle section that is inserted between two transition pieces. For doorways, etc., a transition piece and then a normal mini cable duct can be used.

A corresponding connector is also provided for connecting the cable duct to normal flush-mounted boxes.

This creates a complete installation system using very few components.

By using this system, installation extensions in old buildings are made much easier and much more cost-effective.

Retrofitting in offices and workshops can also be carried out quickly and inexpensively.

The in-plaster variant is used in new buildings. What is particularly interesting here is that the cable duct can already be provided as a recess in precast concrete elements, which is easier than pouring in boxes and empty pipes.

The installation system according to the invention offers a previously unknown flexibility in electrical installation and its use.

The invention is shown in the drawings by way of example and schematically. In detail:

Figure 1: a part of the cable duct with the socket attached in locked position in the projection,

Figure 2: An assembly drawing of the socket insert and housing in section and the front view of the housing,

Figure 3: the cable duct in section, Figure 4: the cable duct with locked socket in section,

Figure 5: two transition pieces (right, left) on round cable and a flexible corner piece,

Figure 6: a transition piece to a round cable in section, Figure 7: a flush-mounted connection insert in front view, Figure 8: a flush-mounted connection insert in section

Figure 9: a flush-mounted version with mounting rail and socket housing in section.

The drawings show an electrical installation system in which sockets (2/3) can be easily mounted on a cable duct (l).

The cable duct is screwed to the wall using the appropriate mounting holes (16).

A housing (3) contains a pivoting socket insert (2). This has the familiar features such as protective conductor contact bracket (4) and contact sockets (o) for phase and zero, which are located behind corresponding holes (7).

There is a hooking lug (lS) on the socket housing (3) with which it is hooked into a hooking groove (17) on the cable duct (l). Other hooking variants are also possible, whereby a negative edge is required.

After hanging it in place, the socket insert (2) is rotated by 90° (position 0 - position 1), whereby the socket (2/3) is connected to the power supply and at the same time locked onto the cable duct (l).

Two locking bolts (19) are molded onto the socket insert (2), which hold it in the housing (3).

During assembly in the factory, the socket insert (2) with these locking bolts (lQ) is inserted through two insertion openings (20) in the housing (3). The socket insert (2) is then turned to the left until the locking bolts (20) snap over the locking and limiting lips (21) in the housing (3).

The socket insert can now be rotated back and forth by 90°, as the locking bolts (19) in the guide groove are stopped on the one hand by the limiting lips (21) and on the other hand by the end stops (22). The socket insert can now no longer be removed from the housing (3).

A square bolt (lÜ) is formed on the socket insert (2) onto which the contact blades (9) and insulated spacer sleeves (ll) are pressed. The connection to the protective conductor contact bracket and the contact sockets (ö) for phase and zero is made by cables (14).

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The cable duct (l) contains the three flat conductors for protective conductor/phase/neutral in corresponding recesses. These are fixed in their recess by the holding and pressing lips (13). The cable duct (l) is closed at its openings at the bottom by the locking lips (12).

When fitting the socket (2/3), the socket insert (2) is first turned to the left into position "0". The socket housing (3) is hung with the hooking lug (lS) in the hooking groove (17) on the cable duct (l).

When the socket insert (2) is then turned to position "1", the square bolt (lO) rotates the pressed-on contact blades (9) up into the cable duct (l).

The locking lips (12) are pushed apart and the contact blades (S) slide between the flat conductors (8) and the contact lips (13).

The pressure of the contact lips (13) ensures secure contact.

Since the socket (2/3) is installed without drawing any current, no oxidation due to sparking is to be expected. The flat conductors (S) can have a cross-section of 2.5 mm ² , for example, a dimension of 5 mm Ø ü.5 inm on v/iron. The socket (2/3) is removed in the reverse order.

There is also an empty space (15) in the cable duct (l) to allow bus, telephone, antenna or loudspeaker cables to be laid. The upper part of the cable duct (l) should be designed to be hinged open for this purpose.

Corresponding connection boxes (telephone etc.) can be attached like the sockets (2/3), whereby the contact blades (9) only serve to lock them in place and the connections are led directly from the empty space (15) into the box.

The hooking lug (lS) can also contact conductors laid directly in the hooking groove (17).

For corner transitions and door bypasses, special transition pieces (23) are required (Fig. 5/6). These are inserted into the end of the cable duct (l) from the side. Three flat contacts (24) slide between them with the help of a chamfer (25). Type K&F conductor (L3) and flat conductor (o) whereby

the locking lips (12) remain closed

The wires (27) of a round cable (26) are attached to the flat contacts (24), which can be used to go around corners or doors as desired.

For corners, we recommend using a flexible piece of cable (25); a conventional mini cable duct can be used to bypass the door.

To connect two cable ducts (l) together, two transition pieces (23) are connected directly to each other.

The flush-mounted connection insert (30) is used to connect the cable duct (l) to flush-mounted boxes or former sockets. It consists of a housing with a flat cover (SO) that is attached to the flush-mounted box using conventional spacers (31). The connection to the power grid is established after the cable duct has been plugged in (from above) using rigid contact blades (9) that are connected to a cable connection (14) in the flush-mounted box (29).

Since the cable duct is then screwed to the wall, an electric shock from touching the contact blades (9) is excluded.

The flush-mounted version of the system (Fig. 9) consists of the same basic technology as the surface-mounted version.

Before plastering the hands or after creating a suitable wall slot, a plaster mounting rail, which can be made of zinc sheet, for example, is attached and aligned using plaster or quick-setting cement (36).

This rail (32) has groove lips (34) for anchoring in the plaster. It can also have a hollow groove (33) for holding a self-tapping screw.

It is advantageous that the front edge of the fastening rail (32) serves as a guide for removing the plaster during plastering. When using precast concrete parts with a corresponding recess, the fastening rail (32) can be dispensed with. The cable duct (l) box is screwed into the fastening rail (32) after plastering, overlapping the utility connection to the fastening rail (32) on its upper and lower edges. This creates a clean visual effect and when plastering, there is a sharp edge that is easy to tape off.

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LIST OF REFERENCE SYMBOLS

1 cable duct

2 socket insert

3 Housing for socket insert

4 protective conductor contact brackets

5 Fixing screw for protective conductor contact bracket

6 Contact socket phase/zero

7 Hole for contact socket

8 flat conductors for protective conductor/phase/zero

9 Contact blades

10 square bolts

11 Insulated spacer sleeve

12 Locking lip

13 Holding and pressure lip

14 Cable connection to contact blade

15 empty space for bus/telephone/antenna/loudspeaker cable

16 Mounting hole

17 Hanging groove

18 Hooking lug

19 Locking bolt

20 Insertion opening for locking bolt

21 Locking and limiting lip for locking bolt

22 End stop for locking bolt

23 Transition piece to round cable

24 Flat contact with

25 phasing

26 Round line

27 cores of the round cable

28 Flexible corner transition piece

29 Flush-mounted box

30 Flush-mounted connection insert

31 Spreader clamps

32 In-wall mounting rail

33 Cavity for fastening screw

34 Moulded retaining lips

35 Masonry/plaster/(precast) concrete

36 Gypsum/Quick-setting cement

Claims (12)

PROTECTION CLAIMS !.Electrical installation system with a cable duct that can be installed above or in the wall and one or more boxes that can be releasably attached at any point, in particular sockets, telephone sockets or the like, whereby one or more electrical conductors are arranged in the cable duct in continuous and outwardly open receptacles with spring-loaded closing and pressing lips, protected against contact, and can be brought into contact with one or more contact pins or blades on the socket, characterized in that the shaft-shaped receptacles are aligned vertically and open at the bottom, whereby the contact pins (9) arranged rotatably on the box (2, 3) can be pivoted into the receptacle shafts, and that the box (2, 3) can be positively hung (17, 18) on the cable duct for fastening and can be locked with the pivoted-in contact pins (9). 2. Electrical installation system according to claim 1, characterized in that the box (2, 3) has a housing (3) with a box insert (2) mounted therein for limited rotation, on which the contact pins (9) are arranged. 3. Electrical installation system according to claim 1 or 2, characterized in that a hooking lug (18) is arranged on the housing (3) of the box and a corresponding hooking groove (17) is arranged on the cable duct. 4. Electrical installation system according to claim 1, 2 or 3, characterized in that the conductors (8) are designed as flat conductors and are arranged in the side walls of the receiving shafts. 5. Electrical installation system according to one of claims 1 to 4, characterized in that the locking lips (12) are arranged at the openings of the receiving shafts. 6. Electrical installation system according to one of claims 1 to 5, characterized in that the pressure lips (13) are arranged in the interior of the receiving shafts opposite the conductors (8) and fix the conductor (8) and press the contact blades (9) onto the conductor (8). 7. Electrical installation system according to one of claims 1 to 6, characterized in that the housing (3) of the attached box closes the receiving shafts at the bottom. 8. Electrical installation system according to one of claims 1 to 7 characterized in that an empty space (15) for laying further cables is present in the cable duct (1). 9. Electrical installation system according to one of claims 1 to 8, characterized in that transition pieces (23) are provided for a transition from the conductors (8) installed in the cable duct to normal cables (26). IQ. Electrical installation system according to one of claims 1 to 9, characterized in that flexible corner pieces (28) are provided for corner transitions at any angle. 11. Electrical installation system according to one of claims 1 to 10, characterized in that the cable duct (1) can be connected to flush-mounted boxes or former flush-mounted sockets by means of a flush-mounted connection insert (30). 12. Electrical installation system according to one of claims 1 to 11, characterized in that a fastening rail (32) is provided for plastering, into which the corresponding cable duct (1) can be screwed or clipped after plastering. i