DE102008028278B4 - Device for passing and holding cables or other strands - Google Patents

Abstract

The invention relates to a device for passing through and holding cables or other strands - with a plate, which can be pushed against the membrane; - A cup-like extension is connected to each surface element; - Each surface element has a closed base made of a pierceable membrane-like surface element, or a base with an opening which tightly encompasses the strand after being pierced.

Description

The invention relates to a device for holding cables. It is primarily about live cables.

Cables are routed to or in any aggregate or location. In particular, cabinets come into consideration, but also machine walls.

What is important is a reliable and perfect fixing of the cable to objects of the environment, for example on the wall of a control cabinet or other body.

An important requirement is to fix the cable in a way that it will not be damaged. Furthermore, the cable must remain reliably at the mounting location. This means that the connection between the cable and the fastening body, thus for example the wall of a control cabinet, must be reliable even when a pull on the cable is applied. For this purpose so-called strain reliefs are used, also called cable ties.

Devices of the type mentioned have become known in a large number of variants. The main disadvantages of the known devices are that they are cumbersome in construction, contain numerous components, are expensive to manufacture, and are in handling, especially in the assembly, impractical.

DE 21 09 548 B describes an entry plate for cables and wires. In this case, a carrier is provided with openings through which cables can be passed.

DE 10 2005 032 896 A1 describes a cable bushing for a housing wall. A bulge of the housing wall has a passage opening.

DE 39 15 007 C2 describes a grommet with a lid pierceable by a cable.

DE 101 05 810 A1 describes a cable entry into an installation device having a stepped recess which is truncated to pass a cable at a particular step.

DE 28 44 787 A1 describes an electrical connection device with a membrane that can be pierced by a conductor.

The invention has for its object to make a device of the type mentioned in such a way that it performs all functions, especially the function of performing and sealing and strain relief. The device should also be as extremely simple in construction and therefore inexpensive to manufacture. After all, it should be easy to assemble and dismantle and versatile in its application. This object is solved by the features of claim 1.

• – Die Vorrichtung umfasst eine Platte, beispielsweise aus Plastik, zum Beispiel aus Weichplastik;
• – die Platte enthält membranartige Flächenelemente, die gegenüber der übrigen Platte eine geringe Dicke aufweisen und die mit einem Strangende des zu haltenden Kabels durchstoßbar sind;
• – an jedes Flächenelement ist ein napfartiger Fortsatz angeschlossen; dieser ist im Allgemeinen einteilig mit der Platte, beispielsweise durch Angießen;
• – jeder Fortsatz weist einen geschlossenen Boden auf, der als durchstoßbare Membran ausgebildet ist.

The essence of the invention consists in the following:

• - The device comprises a plate, for example made of plastic, for example made of soft plastic;
• - The plate contains membrane-like surface elements, which have a small thickness compared to the rest of the plate and which are pierced with a strand end of the cable to be held;
• - To each surface element a cup-shaped extension is connected; this is generally in one piece with the plate, for example by casting;
• - Each extension has a closed bottom, which is formed as a pierceable membrane.

• – Sie umfasst zwei Platten, die in einem gegenseitigen Abstand sowie parallel zueinander angeordnet sind;
• – jede Platte weist membranartige Flächenelemente auf, die mit einem Ende eines Stranges durchstoßbar sind;
• – jedes Flächenelement der einen Platte fluchtet mit einem Flächenelement der anderen Platte.

According to a second embodiment, the device may be constructed as follows:

• - It comprises two plates, which are arranged at a mutual distance and parallel to each other;
• - Each plate has membrane-like surface elements, which are pierced with one end of a strand;
• - Each surface element of a plate is aligned with a surface element of the other plate.

The device is intended to be fixed to a body, for example on the wall of a control cabinet. The cabinet contains for this purpose a recess which has approximately the floor plan of the device. In general it will be a little smaller. The device is fixed to such a body by means of screws or gluing or in some other way. If the device is mounted, the fitter takes the respective strand, for example a cable, pierces a membrane-like surface element of a plate, then optionally also the bottom of the cup-like extension, or a membrane-like surface element of the other plate. The strand is then firmly enclosed in two places, which have an axial distance. In the former embodiment, the one place is the pierced membrane of the plate, and the second place is the cup-like extension in the bottom area thereof.

In the second embodiment, the clamping points lie on the first and on the second piercing membrane.

Depending on the dimensions of the material of the plates or the cup-like projections and depending on the choice of material a more or less tight fit between the lateral surface of the strand on the one hand and the pierced material on the other hand is achieved. In this way, a strain relief can be achieved. The strand is fixed after piercing the membranes or the bottom of the cup-like extension such that the strand in the axial direction when exercising the usual forces is no longer movable. He can therefore no longer be pulled out of the plate. At the same time damaging the lateral surface of the strand is avoided.

A particularly advantageous solution is to make the device circular, and to provide the one plate with cup-like projections or the two mutually parallel plates with a threaded bushing. The longitudinal axis of the threaded bushing runs perpendicular to the plane of one or the other plate. The threaded bush is best encased by the material of the plate or plates, which can be achieved by casting or spraying. Conveniently, the plate and extension material is made of a soft material, as the threaded bushing. The threaded bushing is fixed by screwing in order to fix it to its base, for example to the said wall of a control cabinet. The invention is explained in more detail with reference to the drawing. It details the following:

1 shows in plan view a first embodiment of a device according to the invention.

2 shows the item of 1 in a longitudinal section.

3 shows the item of 1 on a reduced scale in a view from below.

4 shows a second embodiment of a device according to the invention.

5 shows the item of 4 in an elevation view.

6 shows the item of 5 in an axial section.

7 shows a third embodiment in a schematic representation.

The first embodiment of the invention comprises a plate 1 on. The plate 1 are cup-shaped extensions 2 a glove. These are in the form of truncated cones.

The plate 1 includes where the cup-like extensions 2 are connected, membrane-like surface elements 1.1 , The surface elements 1.1 have a smaller thickness than the rest of the plate.

The cup-shaped extensions 2 are frustoconical. The extensions have closed bottoms. They are open at the bottom in this embodiment. Instead, they could also have closed floors. Each cup-like extension is in each case opposite a membrane-like surface element; these two are thus aligned with each other in the puncture direction.

The plate 1 is at its two front ends with frame parts 3 firmly connected. The connection between the plate 1 and the frame parts 3 can be produced for example in an injection molding process. The frame parts 3 have holes 3.1 for passing screws, with which an attachment to a base, for example, the rear wall of a control cabinet is made.

If the device is mounted, the fitter takes cable by cable. He pierces one end of each membrane-like surface element 1.1 the plate 1 , He then leads the cable through the cup-like extension 2 up to its exit opening and through it. Has the cup-shaped extension 2 a closed floor, so the free end of the cable pierces this floor.

The cable which has passed through the device in the manner described is enclosed in two places more or less firmly by the plastic material, on the one hand on the membrane-like surface element 1.1 the plate, on the other hand in the area of the bottom of the cup-like extension 2 ,

As a material of the plate 1 and thus also the extensions 2 comes out of plastic and any other material into consideration, such as rubber, at least a material that surrounds after piercing more or less tightly around the peripheral surface of the cable and thus clamps the cable.

How to get out 2 recognizes are sealing strips at the front ends 3.2 intended. These serve to seal the device against the mounting wall, not shown here. They are made of soft material. They can be injected. The membrane-like surface elements 1.1 , the bowls 2 and the sealing strips 3 can be one piece. They can be manufactured in the same process.

In the embodiment according to the 4 . 5 and 6 is the plate 1 circular. It is otherwise constructed exactly as in the embodiment according to the 1 to 3 , The essence of this second embodiment is that with the plate 1 a threaded bush 4 is firmly connected, for example, in turn, that the one axial end of the threaded bush in the manufacturing process of the plate 1 is sprayed with their material.

The threaded bushing can be screwed into a thread that is located in a base, thus, for example, again in the back wall of a control cabinet. The threaded bush 4 according to the second embodiment fulfills in a way the same function as the frame parts 3 the first embodiment.

Both the frame parts 3 as well as the threaded bush 4 are suitably made of a harder material than the material of the plate.

The third embodiment according to 7 is shown only schematically. The device comprises two plates 1 . 1' , The two plates are with membrane-like surface elements 1.1 . 1.1 ' Mistake. In each case a surface element is aligned 1.1 from plate 1 with a surface element 1.1 ' from plate 1' , For mounting a cable are each two opposing surface elements 1.1 and 1.1 ' pierced by a cable end. The cable is then again in two places from the material of the relevant plate 1 respectively 1' spans.

Like from the 1 . 3 and 7 can be seen, the membrane-like surface elements 1.1 . 1.1 ' have different diameters, as well as the cup-like extensions 2 , Also in the embodiment according to the 4 . 5 and 6 can be a circumferential seal 3.2 be provided - see the 5 and 6 , This is made of soft material. In this case, of course, it is ring-shaped. The sealing ring 3.2 can also be sprayed here again. It creates a seal between the device and a mounting wall.

LIST OF REFERENCE NUMBERS

1

plate

1'

plate

1.1

membranous surface element

1.1 '

membranous surface element

2

cup-shaped extension

3

frame part

3.1

drilling

4

threaded bushing

Claims (6)

Apparatus for sealing, passing and holding cables or other strands; 1.1 with a plate ( 1 ) comprising membranous surface elements ( 1.1 ) pierceable with a strand end; 1.2 to each surface element ( 1.1 ) is a cup-shaped extension ( 2 ) connected; 1.3 the surface elements ( 1.1 ) and the cup-like extension ( 2 ) are aligned with each other in the penetration direction of the strand; 1.4 each extension ( 2 ) has a closed bottom of a pierceable membrane-like surface element, whereby a strain relief is achieved 1.5, such that the strand after piercing the membrane-like surface elements ( 1.1 ) and the closed bottom or after passing through the opening of the extension ( 2 ) is fixed in the device. Device according to claim 1, characterized in that the plates ( 1 . 1' ) made of plastic or soft plastic or rubber or other elastic material. Device according to claim 1 or 2, characterized in that the plates ( 1 . 1' ) in frame ( 3 ) that the material of the frames ( 3 ) harder than the material of the plates ( 1 . 1' ), and that the frames ( 3 ) are mounted on a solid body. Device according to one of claims 1 to 3, characterized in that the plates ( 1 . 1' ) round and with a threaded bushing ( 1.4 ) are provided. Device according to one of claims 1 to 4, characterized in that a sealing element 3.2 is provided for sealing the device to a substrate such as on a machine wall or on the wall of a folding cabinet. Apparatus according to claim 5, characterized in that the sealing element 2 is firmly connected by injection with the rest of the device.

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