JPH0524725B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for introducing flat cables into walls, casing walls, etc., in particular into plug connector casings.

The cable entry must be carried out in such a way that the cable can withstand tensile loads, in order to prevent the cable from being pulled out of the plug-in connector casing or the cable entry device, as the case may be, and to avoid introducing unacceptable tensile loads at the conductor connection point. It must be held sufficiently securely so that the cable is not damaged by the loading of bending forces.

Cable introduction devices with devices for compensating tension loads are generally known for cables of circular cross section. In this case, the cable is fixed in the round cable passage by means of a so-called stuffing box screw mechanism using a ring-shaped elastic sealing element or clamping element. In this case, the sealing element is compressed by one of the threadable parts, and at this time the inner diameter of the sealing element is reduced and pressed firmly against the outer circumference of the cable passing through it. In this case, on the one hand, the cable is held immovably in the cable entry and, on the other hand, the cable entry is sealed against external influences such as dust and moisture. Such stuffing box screw mechanisms, however, are unsuitable for flat flat cables due to the geometry and dimensions of the flat cable. Therefore, the object of the present invention is to adapt the dimensions (width and thickness) of the flat cable,
A flat surface that is well protected against the ingress of foreign objects, holds the cable reliably against tensile loads, and also does not cause damage to the introduced cable when bending forces are applied to the cable. An object of the present invention is to provide a cable introduction device for type cables.
This problem is solved according to the invention by providing a cable introduction device of the type mentioned in the introduction, which has a frame-shaped holding part, which holding parts have struts arranged on mutually opposite sides, and The bottom of the holding part has a cable passage hole facing into the casing interior, and a concave molded part is formed in the holding part, and the concave molded part has a hole on the edge thereof for the elastic packing to be inserted. The packing has a support shoulder, and the packing has a through hole corresponding to the cross-sectional shape of the flat cable, and the flat cable is held between the tension load compensating curved piece and the support of the holding part. This problem is solved by being able to be connected with screws.

According to the invention, a flat cable entry device is obtained which has a sealing effect as well as tension load compensation, which flat cable entry device is adapted to the cross-sectional shape of the flat cable and which The lateral dimension of is extremely small. Such a cable entry device can be used particularly advantageously with thin rectangular plug-in housings or housings in general. Such a cable introduction device can be used particularly advantageously for the connection of electrically conductive cables of moving machines, such as, for example, trolleys or the like.

According to the embodiments set forth in claim 8 or 9, the cable introduction device is not only used for introducing one cable, but also for introducing a plurality of flat cables parallel to each other. It can also be used for superimposed introduction.

The embodiment according to claim 9 is particularly advantageous from the point of view of manufacturing and storage costs. This is because for any cable structure or number of cables, a single cable entry device with correspondingly sized cable passage holes can be used. In this case, it is possible to adapt the cable introduction device to the cable shape used by using cost-effective packing, which is manufactured in a different shape each time according to the cable shape used, together with the pressure plate. .

The invention will now be explained with reference to the illustrated embodiment.

The flat cable introduction device having a tensile load compensating device shown in FIGS. Become. Holding part 1
are provided in the plug connector housing 6 and are fixed to the housing 6 by means of screws 7, also over the through-hole 8 for the introduction of the flat cable 9.

An elastic packing 2 is inserted into the holding part 1, and in this case the packing 2 rests on a support shoulder 10 provided at the bottom of the holding part and is surrounded from the side by the sides 11 of the holding part. and closely surrounds the flat cable 9. A pressure plate 3 is provided on the seal 2, which is screwed to the holding part by screws 12 and is pressed against the seal 2 with an annular projecting edge 13.

The holding part 1 furthermore has two vertical side struts 14, on which the tensile load compensating bends 4, 5 are attached. For this purpose, one of the two curved pieces has a screw hole, and the column and the other curved piece each have a through hole for passing a screw 15.

When both curved pieces are screwed together, the flat cable 9 is tightened between these two curved pieces and held securely. In order to obtain good tightening, the curved piece 4 extends perpendicularly to the cable 1.
The curved piece 5 has two ribs 17 spaced apart from each other. Damage to the cable is prevented by a suitable rounding of the ribs, in which case the outwardly facing edge 18 of the bending piece 4 is also rounded so as to prevent damage to the cable in the event of bending loads. Also cable damage is prevented.

The assembly of the cable introduction device of the present invention is as follows.

First, the holding part 1 is screwed onto the plug connector casing 6. In this case, an annular groove 24 is formed on the lower surface of the holding part.
It is also possible to insert a packing ring 19 into this groove, in which case the inside of the casing can be sealed against foreign objects and moisture.
Next, the packing 2 is inserted into the holding part 1, and the flat cable 9 is introduced through the through hole 28 of the packing 2. The pressure plate 3, which has been previously fitted onto the flat cable, is then connected to the holding part 1 with screws.
At this time, the protruding edge 13 of the pressure plate presses on the packing, and the packing 2 is deformed laterally by the side 11 of the holding part surrounding it and cannot escape, so it moves inward toward the cable. try to escape to This causes the seal to be firmly pressed around the flat cable. This ensures that the cable entry points are perfectly sealed against intruding foreign objects or moisture. Subsequently, the tensile load compensating curved pieces 4, 5 are positioned and screwed together. At this time, the flat cable introduced between the two curved pieces is firmly tightened and held. In this case, the curved piece is at the same time fixedly connected to the support of the holding part. The flat cable introduction device obtained in this way provides, on the one hand, an excellent tensile load compensation for the introduced flat cables and, on the other hand, the ability to prevent intrusion attempts.
Sufficient sealing inside the casing against dust, moisture etc. is achieved.

The flat cable entry device according to the invention can be used on all flat casing surfaces or walls. For flat cable dimensions (width/thickness) that vary within a wide range, correspondingly different through-hole seals and pressure plates can be provided, adapted to the cables used in each case. It is also possible to introduce two or even more flat cables one above the other into the cable entry device; and a pressure plate can be used, by pressing the seal against the outer cable and causing the cables themselves to be pressed together, a sealing of the cable entry point is again achieved in this case.

For flat cable entry systems in which no special requirements are placed on the sealing of the casing interior, i.e. it only needs to be sealed against coarse contaminants and does not need to be sealed against moisture, a pressure plate may be used. This can be omitted, and the thickness of the packing can be such that it extends somewhat beyond the sides 11 of the holding part. In this case, however, the tensile load-compensating bending piece is constructed in such a way that its underside presses against the seal when the bending piece is screwed onto the support of the holding part. In this case, it is also possible to provide the underside of the curved piece with a strip-shaped profile similar to the protruding edge 13 of the pressure plate.

In order to understand the construction of the different parts of the flat cable introduction device and their interaction with each other, these parts are shown separately in FIGS. 3 to 8. These will be explained below.

FIG. 3 shows a plug-in connector housing 6, which has on its upper side a rectangular opening 8 for passing the flat cable to be introduced. A through hole 20 for fixing the holding part 1 with a screw is provided next to the through hole 8. The illustrated plug-in casing is otherwise similar to known commercially available casings into which a plug-in connector (not shown) can be inserted from below.

FIG. 4 shows the holding part 1 viewed from various directions.
It is shown. The holding part 1 essentially consists of a frame-shaped base part 21, which has one post 14 on each of its two sides facing each other. The base part 21 has a concave profile 22, in this case rectangular, on which the sides 11 of the holding part 1 are formed. A rectangular cable passage hole 23 for the flat cable to be introduced is provided at the bottom of the molding. This cable passage hole 23 has a width smaller than the internal width of the concave molding 22, so that a supporting shoulder 10 for the packing 2 to be inserted later is formed here. An annular groove 24 is formed on the lower surface of the holding part 1, into which the packing ring 19 can be inserted, as already mentioned. The column 14 has a hole 25 in its upper region, which hole 25 serves for mounting the tensile load-compensating curved piece 4, 5. A screw hole 26 is provided for fixing the holding part 1 to the plug-in connector casing 6 or to a wall. A screw hole 27 provided on the frame-shaped upper surface of the frame-shaped holding part 1 is a screw hole for attaching the pressure plate 3.

In FIG. 5, the packing 2 is shown. The seal 2 is made of an elastic material, such as Mohs rubber. The outer dimensions correspond to the dimensions of the recess 22 of the holding part, and the thickness of the seal is approximately equal to the depth of this recess. The thickness of the packing must be selected at least such that when the packing is compressed by the pressure plate, there is sufficient packing material to "flow" across the packing. Furthermore, the seal has a rectangular central hole 28, the dimensions (length/width) of which are determined according to those of the flat cable used.

FIG. 6 shows the structure of the pressure plate 3. The pressure plate 3 essentially consists of a flat, rectangular, shaped plate adapted to the external dimensions of the holding part, with lateral slots 29 provided for receiving the supports 14 of the holding part. It is being The pressure plate 3 is still
It has a rectangular cable passage hole 30 adapted to accommodate a flat cable to be inserted. The cable passage hole 30 is surrounded on its periphery by a raised edge 13, which is pressed onto the seal 2 when the flat cable entry device is assembled. The holes 31 are provided for fixing the pressure plate 3 to the holding part.

Finally, FIGS. 7 and 8 show the tensile load compensating curved pieces 4, 5. As already mentioned, these curved pieces 4, 5 are screwed together with the flat cable sandwiched between them.

Curved piece 4 with bending rigidity to obtain good tightening force
has ribs 16 extending laterally,
In contrast, the curved piece 5, which is also bendingly rigid, has two ribs 17 spaced apart from each other. The curved piece has holes 32 and 33 at the end thereof for screwing while being inserted into the support column 14 of the holding part,
In this case, one of the curved pieces has a transparent hole 33 in the transparent piece.
However, a screw hole 32 is provided in the other curved piece.

In order to avoid damaging the cable, the edges of the ribs that contact the cable and of the bending piece itself are rounded off.

Of course, it is also possible to manufacture one of the two curved pieces integrally with the support column of the holding part 1.

Figures 9 to 11 show the plug connector casing 1.
Another embodiment of 01 is shown. A frame-shaped holding part 102 is provided on the upper side of the casing, which is manufactured in one piece with the casing.
The housing with the retaining part is made of metal or plastic and is preferably produced by die-casting or injection molding. A substantially rectangular cutout 103 is formed in the holding part, and a rectangular cable passage hole 104 is formed in its bottom surface, which communicates with the interior of the casing. The dimensions of this cable passage hole 104 are the dimensions of the notch 103.
Therefore, a shoulder is formed around the cable passage hole 104 to surround the hole. Two mutually opposite sides of the holding part are provided with upright posts 106, to which are attached the tensile load compensating bends described below. A suitable hole 107 for this purpose
is installed on the pillar. Furthermore, the holding part is provided with a screw hole 108, which screw hole is also for fixing a pressure plate, which will be described later.
A plug connector, not shown, is inserted into the casing from the side of the casing opposite the holding part.

FIGS. 12 and 13 then show how the flat cable 109 is introduced into the housing 101 and is held and secured in a tensile load-compensated manner. Holding part 102
A packing 110 made of an elastic material such as soft rubber or Mohs rubber is inserted into the notch 103 . The outer dimensions of the packing correspond to the dimensions of the cutout 103 and have a rectangular central slot 122 corresponding to the cross-sectional shape of the flat cable. A pressure plate 111, 111' made of a bendingly rigid material, for example a sheet steel, is arranged on the upper and lower side of the seal. The outer dimensions of these pressure plates correspond to the cutout 103 of the holding part and have a hole in the center, which has dimensions corresponding to the cross-sectional dimensions of the flat cable 109 to be introduced. have. The flat cable is introduced through the slit 122 in the packing and the hole 128 in the pressing plates 111, 111', and then into the interior of the casing through the cable passage hole 104. The pressure plate 112 is passed over the cable and is screwed to the retainer by screws 113 that are screwed into the holes 108. In this case the annular raised edge 1 of the pressure plate 112
14 is pressed onto the upper pressing plate 111, and at this time the seal is compressed. Since the side portion 115 of the holding portion surrounding the packing of the holding portion from the outside side prevents the packing from escaping outward, the packing tries to escape inward toward the cable. In this case the seal is pressed firmly against the flat cable from all sides. In this case, the lower pressure plate 111' rests on the edge of the holding part (supporting shoulder 105), so that the elastic seal is preferably designed to be large for the introduction of several parallel flat cables. This prevents the cable from escaping through the cable passage hole 104. Overall, a cable entry device constructed in this manner provides an excellent seal against intruding foreign objects and moisture.

Two further tensile load compensating curved pieces 116,1
17 are provided, and these are screwed to the support column 106 of the holding part with the flat cable sandwiched between them. For this purpose, one of the two curved pieces has a screw hole, and the other curved piece and the support each have a through hole for passing the screw 118.

When the two curved pieces are tightened together, the flat cable is clamped between these curved pieces and held securely.

In order to obtain a good clamping effect, the curved piece 116 has ribs 119 extending transversely to the cable.
The curved piece 117 also has two spaced apart ribs 120 . When both curved pieces are tightened together, the rib 119 of the curved piece 116 is directed towards the center between both ribs 120 of the curved piece 117. The edges of the ribs are correspondingly rounded to prevent damage to the cable.
In this case the outwardly facing edge 12 of the curved piece
1 is also rounded to prevent damage to the cable when it bends and contacts the edge 121.

The flat cable entry device according to the invention is not only applicable to plug connector housings, which are each manufactured to a predetermined cable size. In this case, a cable passage hole 104 in the holding part is made corresponding to the cable cross section, and
Different seals and pressure plates with correspondingly dimensioned slits are used. In such a casing adapted to the respective cable cross-section, in particular any pressure plate 11
There is no need to provide 1,111'. This is because in this case it is possible to achieve a satisfactory sealing effect even without such a pressure plate.

In order to be widely usable in plug-in connector casings, the sizes of the cable passage holes 104 in the retainer and in the casing are advantageously similar to each other, as shown in FIGS. 9-13. Designed for the maximum number of flat cables that can be installed in a stack. Such a configuration is shown in Figure 13A. In this case three flat cables 109, 109', 109'' are introduced and held and fixed. Cable opening 1 designed for the maximum number of flat cables that can be introduced.
If the maximum number of cables is used in a casing with 04, it is not necessary to insert a pressure plate. This is because in this case, even without the pressure plate, the seal cannot escape from the through hole and a perfect sealing of the cable entry device is achieved. In this case, the cables which are placed one on top of the other flatly are pressed tightly together. When using a flat cable introduction device for a smaller number of cables or for cables with a thinner thickness, pressing thin plates 111, 11
1' can be inserted and used as already mentioned, which results in a satisfactory seal. The advantage of this embodiment is that standard casings can be used, for different numbers of cables or cable dimensions.
Adaptation can be achieved by using cost-effective pressing plates and packings that differ only in the size of the holes 128.

For flat cable entry devices where no special requirements are imposed on the sealing of the casing interior, in other words, only sealing against contaminants and not even moisture is required, the pressure plate may be omitted. In addition, the thickness of the gasket may be such that it somewhat protrudes from the side portion 15 of the holding portion. In this case, however, the tensile load compensating curved piece must be constructed in such a way that its lower side is pressed onto the seal when the two supporting strut curved pieces of the holding part are screwed together. In this case, the underside of the curved piece can additionally be provided with a strip profile, similar to the raised edge of the pressure plate.
In order to understand the structure of the packing 110, the pressing thin plates 111, 111', and the pressure plate 112 and their mutual effects, these members are shown in FIGS. 14 to 16.
They are individually illustrated in the figure and will be briefly described below. In this case, the tensile load compensating curved pieces 116, 117 have the same construction as those in FIGS. 7 and 8.

A gasket 110 is shown in FIGS. 14A and 14B. The seal 110 is made of an elastic material, preferably soft rubber. The outer dimensions are designed in this case in accordance with the dimensions of the recess 103 of the holding part, and the thickness of the seal is approximately equal to the depth of this recess 103. The thickness of the packing must be at least thick enough to allow sufficient packing material to "flow" laterally through the packing when the packing is compressed by the pressure plate. Furthermore, the packing has a central rectangular hole (slit 122) whose size (length/width) is designed to correspond to the flat cable used, and in some cases may be marked with a chain line. Can be designed up to the size shown.

15A and 15B show the pressing thin plate 11.
1,111' configuration is shown, which is the first
It has a shape approximately equal to that of the packing shown in FIGS. 4 and 14B, but is made from a thinner and more bendingly rigid material.

16A, 16B, and 16C show the configuration of the pressure plate 112. FIG. The pressure plate essentially consists of a flat, rectangular plate adapted to the shape of the holder with respect to its outer dimensions, in which case lateral slots 123 are provided for receiving the supports 106 of the holder. The pressure plate has a rectangular cable passage hole 124 adapted for the flat cable to be inserted. The periphery of the hole is surrounded by a raised edge 114, which edge includes:
During compression of the cable introduction device, it is pressed onto the packing 110 or onto the pressure plate 111. Hole 12
5 is a hole provided for fixing the pressure plate to the holding part.

As already mentioned, a tensile load compensating curved piece is also used in this embodiment, which curved piece is illustrated in FIGS. 7 and 8. The cage is constructed in accordance with the tensile load compensating bend of the first embodiment and is arranged in the same manner.

[Brief explanation of the drawing]

The drawings show an embodiment of a flat cable entry device according to the invention, FIG. 1 showing a flat cable entry device provided as a separate structural part in the plug connector casing, and FIG. Figure 1 is a sectional view taken along line 2-2 of the flat cable introduction device; Figures 3A and 3B are views showing the plug connector casing before the flat cable introduction device is installed; Figures 4A and 4;
Figures B, 4C, and 4D are diagrams showing the frame-shaped holding part, Figures 5A and 5B are diagrams showing the packing,
Figures 6A, 6B and 6C are views showing the pressure plate; Figures 7A, 7B and 7C are views showing one of the tensile load compensating curved pieces; Figures 8A and 8B are views showing the pressure plate;
9 and 8C show the other tensile load compensating bending piece, FIG. 9 is a sectional view of the plug-in connector casing with integrally molded retaining part, and FIG.
Figure 11 is a side view of Figure 9; Figure 11 is a plan view of Figure 9;
The figure shows the fully assembled flat type cable introducing device in the plug connector casing shown in Figures 9, 10 and 11, and Figure 13 shows the flat type cable introduction device according to line 13-13 in Figure 12. 13A is a sectional view corresponding to FIG. 13 of the flat cable introduction device into which three flat cables are introduced; FIGS. 14A and 14B are views showing the packing; FIG. 15A is a sectional view of the cable introduction device; 15A and 15B are views showing a pressing thin plate, and FIGS. 16A, 16B, and 16C are views showing a pressure plate. 1,102...Holding part, 2,110...Packing, 3,112...Pressure plate, 4,5,116,1
17... Tensile load compensation curved piece, 6,101...
Plug-in connector casing 7...Screw, 8...Through hole, 9, 9', 9'', 109, 109', 109''...
...Flat cable, 10,105...Support shoulder, 1
1,115... Side part, 13,114... Protruding edge, 14,106... Support column, 16,17,11
9,120...Rib, 18...Edge, 19...Packing ring, 20...Through hole, 21...Base part, 22,103...Concave molded part, 23,3
0,104,124...Cable through hole, 24...
...Groove, 103...Notch, 111, 111'...
...Pressed thin plate.

Claims (1)

Claims: 1. A device for introducing a flat cable into a wall, a casing wall, in particular a plug connector casing, which has frame-shaped holding parts 1, 102, which holding parts are opposite to each other. It has struts 14, 106 arranged on the sides, and has a cable passage hole 23, 104 facing toward the casing interior at the bottom of the holding part, and a concave molded part in the holding part 1, 102. 22,
103, the concave molding has on its edge a supporting shoulder 10, 105 for the elastic packing 2, 110 to be inserted, and the packing has a cross section of the flat cable 9, 109. It has transparent holes 28, 122 corresponding to the shape, and the tensile load compensating curved pieces 4, 5; A device for introducing flat cables, characterized in that they can be connected with screws. 2. The holding part 1 is removably fixed to a wall or casing surface by aligning the cable passage hole 23 of the holding part 1 with a through hole 8 provided in the wall or casing surface. 1
A device for introducing the flat cable described in Section 1. 3. The holding part 1 has an annularly extending groove 24 on its lower surface facing the wall surface or the casing surface, and the packing ring 19 can be inserted into the groove. A device that introduces flat cables. 4. Device for introducing a flat cable according to claim 1, wherein the holding part 102 together with its cable passage hole 104 is integrally molded into the plug connector casing 101. 5 Tensile load compensation curved piece 4, 5; 116, 11
Claims 1 to 4, in which 7 is integrally molded with the supports 14, 106 of the holding part 1, 102.
A device for introducing the flat cable described in any one of the preceding paragraphs. 6 one of the tensile load compensating curved pieces 4,116 extends longitudinally at right angles to the cable;
having rounded ribs 16, 119 and the other 5, 117 of the tensile load compensating curved piece having two mutually spaced rounded ribs 17;
120, and when both tensile load compensating curved pieces are screwed together, the ribs of one tensile load compensating curved piece are directed toward the center between both ribs of the other tensile load compensating curved piece. An apparatus for introducing a flat cable according to any one of claims 1 to 5. 7 Pressure plate 3, 112 is central cable passage hole 3
0,124 and pressure plate 3,112
is a raised edge 1 directed toward the packing 2, 110, which extends around the cable passage hole.
3,114, and the pressure plate can be connected to the holding part 1,102 with a screw, according to any one of claims 1 to 6. device to do. 8 Single or multiple flat cables 9; 9, 9'; 9, 9' into which the cable passage hole in the holding part is introduced;
9″;109;109,109′;109,10
9′, 109″ cross-sectional shape, and the gaskets 2, 110 have through holes 28, 122 of equal size. Any 1 from to Paragraph 7
A device for introducing the flat cable described in Section 1. 9. The cable passage holes in the holding part are made in accordance with the cross-sectional shape of the maximum number of superposed flat cables 9, 9', 9"; 109, 109', 109" to be introduced. The packing 2, 110 to be inserted therein has a through hole 28, 122 dimensioned according to the flat cable or cables used, and the top surface of the packing and Or on the underside, the through hole 2 of the packing
having holes corresponding to the length and width of 8,122;
8. Device for introducing a flat cable according to claim 1, in which bendingly rigid pressure plates 111, 111' are arranged.