DE102020123879B4 - Retaining clip for a fiber optic tube, fastening device with a retaining clip, construction kit with a retaining clip and cable distribution cabinet - Google Patents

Abstract

So that a retaining clip (2) with a C-shaped retaining clip (13) for a GF tube (100) not only guides the GF tube (100) transversely to its longitudinal direction (10), but also relieves strain on the GF -Tube (100), strain relief elements (18), in particular retaining teeth (18), are formed in the inner peripheral surface of the retaining clip (13).

Description

I. Field of application

The invention relates to a retaining clip for a so-called glass fiber tube and a construction kit with such a retaining clip for creating a fastening device for glass fiber tubes.

II. Technical background

Fiber optic strands are used for broadband data transmission, i.e. for Internet as well as for TV and telephone connections. The cable distribution cabinet (KVZ), which is usually set up outdoors, contains the - mostly passive - optical distribution systems for a specific spatial area, for example a street. The fiber optic strands from individual houses or apartments are connected in the cable distribution cabinet to the main fiber optic strand, which is usually laid underground.

Analogue KVZ are already available in large numbers on public land for the connection of individual users via copper cables. Now the users are to be supplied with a fiber optic line.

In contrast to copper cables, however, fiber optic cables are mechanically less stable and more easily damaged, and the glass fibers must therefore be contained in a sufficiently stable sheath as far as possible.

First, a number of glass fibers or just a single glass fiber is sheathed, usually in two layers with an inner sheath and an outer sheath, which is preferably made of plastic, which is already referred to as a glass fiber cable.

A large number of such fiber optic cables are combined into a cable assembly and protected with a composite sheathing, so that such a cable assembly can also be laid underground, depending on the specific structure, as a fiber optic main cable, so to speak, along a road, for example.

With these fiber optic cables, a distinction is made between microcables with only one fiber bundle with a maximum of 12 fibers and minicables with up to 12 fiber bundles, each with a maximum of 12 fibers, whereby only with minicables, in addition to the fiber bundles, a high-tension core is also carried inside, which is at a terminal point can be fixed for the minicable and offers strain relief.

At least in the case of these minicables, the individual fiber bundles must each be held together and protected against kinking by a surrounding protective tube made of relatively rigid material once their sheathing has been removed.

Within a KVZ, the fiber optic cables to be routed there are each individually routed in a relatively hard, rigid guide tube made of plastic, the so-called glass fiber tube - hereinafter abbreviated to GF tube - with play, so that such a cable bundle can only be routed in the KVZ in a such a GF tube can be pushed in or blown in.

For this reason, it is essential that the internal free cross-section of these GF tubes is not impermissibly reduced at any point, otherwise it is not possible to insert the fiber optic cable. Care must be taken in particular at the points where the GF tubes are fixed using a fastening device in the distribution cabinet.

A large number of fiber optic cables, each with a surrounding GF tube, must be laid and also fastened in the distribution cabinet.

The present invention deals with the guidance and fixation of these GF tubes in a KVZ.

It should be noted that these GF tubes come in different diameters, depending on the required capacity of the fiber optic cable.

It is often only known when the distribution cabinet is delivered which diameter of GF tubes are to be attached there, the number of which can often only be precisely determined on site.

Therefore, a corresponding fastening device must be able to be adapted flexibly and with little effort, i.e. if necessary only at the installation site of the KVZ, i.e. outdoors.

In this context, fastening devices are already known, which usually consist of sheet metal parts that contain a conventional cable clamp that can be compressed by means of screws.

On the one hand, this has the disadvantage that if the cable clamp is screwed on too tightly, the diameter of the GF tube held therein is impermissibly narrowed, since undefined forces are applied.

Furthermore, this means that different cable clamps and thus different sheet metal parts must be produced and kept available for GF tubes with different diameters, since the cable clamps are not arranged as individual parts on the fastening device so that they can be replaced. In addition, the assembly is very tedious and error-prone due to a large number of screwing processes, for example because it is very difficult to find screws that fall down inside the distribution cabinet.

Therefore, in the meantime, retaining clips, to which the present application is directed, among other things, and which are usually made of plastic, are known, for example from DE 10 2011 012 438 A1 , in whose C-shaped retaining clip a GF tube can be pressed from the open side and held therein with a positive fit and guided transversely to the longitudinal direction of the GF tube.

However, the GF tubes must also be relieved in their extension direction against tensile forces acting on them from the outside.

Such a strain relief was usually already provided when the fiber optic cable entered the distribution cabinet by means of a complex strain relief device on or in its base plate.

Furthermore, from the WO 2018/091205 A1 , especially 18 - 23 , as well as the US4119285A , especially 2 - 8th , Each retaining clip with a clamp area with a C-shaped retaining clip with an interior space open on both sides in the longitudinal direction and a lateral insertion opening for positively receiving a glass fiber tube are known, but which have no strain relief element on or in the retaining clip.

III. Presentation of the invention

a) Technical task

It is therefore the object of the invention to provide a retaining clip and a modular system and a fastening device that can be produced from it, the retaining clips offering both guidance of the GF tube transversely to its longitudinal direction and strain relief, and with little expenditure of time and without risk of damage for the GF tubes, a quick and clear fixation of the GF tubes in the individual retaining clips and thus the cable distribution cabinet is made possible.

The modular system is intended to enable quick creation of differently designed, specific fastening devices, even on site in the cable distribution cabinet.

b) Solution of the task

This object is solved by the features of claims 1, 28, 32 and 33. Advantageous embodiments result from the dependent claims.

With regard to the retaining clip, this object is achieved in that at least one strain relief element is present on or in its retaining clip. As a result, separate strain relief devices no longer have to be provided apart from the retaining clips and operated separately.

The at least one strain relief element is preferably designed in such a way that it only holds the GF tube in one direction of the longitudinal direction of the GF tube, the strain relief direction, and provides strain relief for the GF tube, with the strain relief preferably taking place in a form-fitting manner.

Contrary to the strain relief direction, ie in the push-through direction, there should be as little resistance as possible to a relative movement of the GF tube to the retaining clip.

At the same time, the at least one strain relief element should prevent or make it difficult as little as possible for the GF tube to be pushed transversely to its longitudinal direction into the retaining clip of the retaining clip.

The strain relief element is preferably a retaining tooth which is arranged on the inner peripheral surface of the retaining clip and protrudes into the interior of the retaining clip and which - viewed from the side of the retaining tooth, i.e. in the tangential direction of the interior of the retaining clip - has a retaining edge which presses the GF tube and penetrates the wall of the GF tube.

Further design features of the retaining clip will be explained later with reference to the figures.

With regard to the fastening device with at least one profile rail and a plurality of retaining clips which can be fastened to it in a form-fitting manner along the profile rail and which are designed as described above, the existing object is achieved in that this profile rail is attached with one of its end faces, in particular only with one of its end faces, to an e.g longitudinal direction of the hal teclipse - which is also the longitudinal direction of the GF tube held therein - running receiving part, such as a receiving plate, is attached, usually by screwing.

If the profile rail is only attached to the receiving part at one of its ends, the other, free end of the profile rail is preferably closed with an end plate attached there, which preferably has a receiving area for attaching a retaining clip.

The profile rail preferably has a plurality of receiving areas for retaining clips, which are located next to one another, in particular one above the other, and are preferably separate from one another, viewed in the direction in which they extend.

With regard to a cable distribution cabinet, the existing object is achieved in that the fastening device used therein is designed as described above.

• - mindestens eine Sorte von Profilschienen mit einem Aufnahmebereich zum formschlüssigen Aufnehmen von Halteclipsen oder Abstandshaltern sowie
• - mehrere Sorten von Halteclipsen, insbesondere mit unterschiedlichem Durchmesser ihrer Halteklammer.

With regard to a construction kit for producing differently designed fastening devices from as few different construction kit parts as possible, the existing object is achieved in that the construction kit has construction kit parts

• - At least one type of profile rails with a receiving area for positively receiving retaining clips or spacers as well
• - several types of retaining clips, in particular with different diameters of their retaining clip.

• - mindestens eine Sorte von Endplatten für die Profilschienen und/oder
• - weitere Sorten von Profilschienen und/oder

wenigstens eine Sorte, vorzugsweise mehrere Sorten, von Aufnahmeteilen, insbesondere von Aufnahmeblechen.The modular system preferably comprises a further modular system part

• - at least one type of end plates for the profile rails and/or
• - other types of profile rails and/or

at least one type, preferably several types, of receiving parts, in particular of receiving plates.

The modular system preferably comprises at least one type of spacer as a further modular element, which spacers can be arranged between retaining clips in the profile rail.

character list

• 1a: einen perspektivischen Blick ins Innere eines vorne geöffneten Kabelverteilerschrankes mit einem 1. Verwendungsort der Halteclipse,
• 1b: eine Befestigungsvorrichtung mit Profilschienen und daran befestigten Halteclipsen separat,
• 1c: eine Detail Vergrößerung aus 1b,
• 1d: eine Detailvergrößerung aus 1a,
• 2: einen perspektivischen Blick ins Innere eines vorne geöffneten Kabelverteilerschrankes mit einem 2. Verwendungsort der Halteclipse,
• 3: einen perspektivischen Blick ins Innere eines vorne geöffneten Kabelverteilerschrankes mit einem 3. Verwendungsort der Halteclipse,
• 4a, b: perspektivische Ansichten einer 1. Bauform des Halteclips,
• 5a, b, c: Aufsicht, Seitenansicht und Rückansicht des Halteclips der 4a, b,
• 6: perspektivische Ansicht einer 2. Bauform des Halteclips,
• 7a, b, c: Aufsicht, Seitenansicht und Rückansicht des Halteclips der 6.

Embodiments according to the invention are described in more detail below by way of example. Show it:

• 1a : a perspective view of the inside of a cable distribution cabinet opened at the front with a 1st place of use of the retaining clips,
• 1b : a fastening device with profile rails and retaining clips attached to them separately,
• 1c : a detail magnification off 1b ,
• 1d : a detail enlargement 1a ,
• 2 : a perspective view of the inside of a cable distribution cabinet opened at the front with a second place of use for the retaining clips,
• 3 : a perspective view of the inside of a cable distribution cabinet opened at the front with a 3rd place of use for the retaining clips,
• 4a, b : perspective views of a 1st design of the retaining clip,
• 5a, b , c : top view, side view and rear view of the retaining clip of the 4a, b ,
• 6 : perspective view of a 2nd design of the retaining clip,
• 7a, b , c : top view, side view and rear view of the retaining clip of the 6 .

the 1a until i.e show as the 1st place of use of the retaining clips 2 a fastening device with a plurality of profile rails 1, along which a plurality of retaining clips 2 are accommodated one behind the other in a form-fitting manner with their fastening area 2b in the receiving area 1a of the profile rail 1 in the form of an undercut groove 6.

1a shows a view of the inside of an open cable distribution cabinet 101, from which on the one hand the base plate 103 can be seen, in which a large number of passage openings 105 can be seen, through which a GF tube 100 - usually with a glass fiber cable located therein - from the base area below, in which the fiber optic main cable as a cable assembly with possibly a large number of such GF tubes 100, opens out, is routed vertically upwards and each GF tube 100 is held in position by a retaining clip 2.

Above the base plate 103 and above the retaining clip 2 holding the respective GF tube 100, a gas-water blocker 104 is arranged in the course of the GF tube 100, which prevents the ingress of water or a gas from the base area of the cable distribution cabinet 101 under the Floor plate 103 opening fiber optic main cable upwards into the housing of the cable distribution cabinet 101 is prevented.

Above the base plate 103, the front ends of freely projecting profile rails 1, which run in the direction towards the viewer, i.e. in the depth direction of the cable distribution cabinet 101, can be seen, the front end of which is supported by an end plate 5 in the form of an end plate 5 serving as an end stop for the retaining clips 2 - which can also be used for labeling - is closed. The end plate 5 can according 1d be formed in several parts and can be inserted with its rear insertion pin 5a in an insertion extension 8 in the form of a likewise undercut groove on the rear of the profile rail 1 facing away from the groove 6 .

1d also shows that, if required, a spacer 3 can also be inserted in the groove 6 between the retaining clips 2 .

The profile rails 1 are arranged in several horizontal rows one above the other and with their in 1a rear, non-visible end attached to the rear wall 102 of the housing of the cable distribution cabinet 101.

1b shows part of a possible design of a fastening device with a plurality of profile rails 1, 1* which can run with their main extension direction 1' horizontally, in the transverse direction or in the depth direction of the cable distribution cabinet 101 and on which the retaining clips 2, 2' are fastened in their retaining brackets 13 - see 1a, i.e - Each one GF tube 100 is added, which run vertically.

These rails 1.1 * are with their in 1c screwed to the left-hand end face on the rail leg 17 of an angled, vertically extending mounting plate 4, in which screws are inserted from the outside through corresponding through-openings 9 in this rail leg 17 and screwed into corresponding fastening areas 1c of the cross section of the profile rails 1.1*.

Opposite the rail leg 17 of the mounting plate, its fastening leg 7 is bent by 90° and screwed behind the beginning of the profile rails 1, 1' on the inside of the rear wall 102 or a side wall of a distribution cabinet 101.

The rail leg 17 is stepped, so that its front edge has a different distance from the fastening leg 7 in the individual receiving areas 4a, b, c, d, in which there are passage openings 9 for fastening a profile rail 1.1*, and thus also the profile rails 1, 1*, since the through openings 9 always have the same distance from the front edge of the rail leg 17.

From the profile rails 1.1 'points - see 1d - The rail 1 only a single receiving area 1a in the form of an undercut, open to the side of the profile shape, groove 6, while the rails 1 * - as in the lower part of the 1b visible - has two such superimposed receiving areas 1a, between which there is a separating web.

If the profile rails 1 do not run in the width direction but in the depth direction, as in 1a shown, the receiving area 1a of a profile rail 1 can have an undercut groove 6 open to the respective side on both sides, as shown in FIG 1a apparent.

How better at the enlarged detail of the 1d As can be seen, this receiving area 1a, which is only a single undercut groove 6 here, is used to insert or screw in the attachment area 2b of the retaining clips 2 by the attachment extensions 19 there fitting into the undercut groove 6 in a form-fitting manner.

Apart from their receiving area 1a, i.e. the undercut groove 6, which is open to the front when assembled, the profile rails 1.1* have above and below a fastening area 1c, which is also C-shaped in cross section, but with the open side facing points up or down. This fastening area 1c serves to screw in the screws inserted through the through-openings 9 of the mounting plate 4 in the longitudinal direction in this C-shaped profile part, which can then be screwed—preferably self-tapping—into the inner circumference of the fastening areas 1c.

Conversely, however, a clamp-shaped fastening area 2b of the retaining clip 2 could also encompass a protruding receiving area 1a of a profile rail 1 from the outside.

The retaining clip 2 includes - like the best 4 until 7 show - in a known manner, a clamp area 2a with a C-shaped retaining clamp 13 with an interior space 13* that is open on both sides and is undercut in the transverse direction and a peripheral insertion opening 22 in the circumference of the retaining clamp 13 for receiving a GF tube 100 in a form-fitting manner.

the direction of passage from one end face to the other is referred to as the longitudinal direction 10, the direction running centrally through the insertion opening 22 perpendicularly to the longitudinal direction 10 as the second transverse direction 11.2 and the direction on these two Directions 10,11.2 perpendicular direction as 1. Transverse direction 11.1.

According to the invention, a strain relief element 18 is additionally present on or in the retaining clip 13, here in the form of a retaining tooth 18, which protrudes from the inner peripheral surface 13'' of the retaining clip 13 into the interior space 13*. Since the inner surface 18a facing this interior space 13* has a retaining edge 18' running transversely to the longitudinal direction 10, this presses into the outer circumference of the GF tube 100 if it is appropriately dimensioned.

By means of the strain relief element 18, the GF tube 100 is held in place in a longitudinal direction 10, the strain relief direction 10a, and relieved of occurring tensile forces, and can be pushed through with little resistance in the opposite push-through direction 10b.

This is achieved by the holding edge angle δ recognizable on the holding edge 18' when viewed from the side being between 60° and 90°, preferably between 70° and 80°, in particular between 72° and 78°, thereby creating a pointed holding tooth 18.

The inner surface 18a of the retaining tooth 18 comprises a plurality of surface sections 18a1, 18a2 which are arranged one behind the other, in particular in the longitudinal direction 10, namely the front section 18a1 pointing in the push-through direction 10b and the rear section 18a2 pointing in the strain relief direction 10a, which meet in the holding edge 18' and with its transition from the other end facing away from the holding edge 18' into the inner peripheral surface 13'' of the holding clip 13.

The front section angle α between the front section 18a1 and the longitudinal direction 10 is a maximum of 130°, better a maximum of 110°, better a maximum of 100°, better a maximum of 95°, better a maximum of 90° or exactly 90° and/or
the rear section angle β between the rear section 18a2 and the longitudinal direction 10 viewed in the side view is a maximum of 25°, better a maximum of 22°, better a maximum of 18°, better a maximum or exactly 15°,
an optimally low resistance when pushed through in the push-through direction is still an optimally high retaining force in the strain relief direction 10a.

For the same reason, the radius of curvature r1 of the holding edge 18' viewed in the side view should be a maximum of 0.3 mm, better a maximum of 0.2 mm, better a maximum of 0.1 mm.

As best in 5a As can be seen, the holding edge 18' can be concavely curved when viewed in the longitudinal direction 10, in particular with a radius of curvature r2 which corresponds at most to the radius of curvature of the inner peripheral surface 13" at this longitudinal position, preferably is smaller, preferably at most 45% of the diameter d of the inner peripheral surface 13" at this Longitudinal position corresponds. The holding edge 18' can also be straight, which depends on the dimensioning of the holding tooth 18 and other parameters.

An essential parameter is also the radial distance A of the holding edge 18' from the inner peripheral surface 13".

This should be a maximum of 1.8 mm, better a maximum of 1.5 mm, better a maximum of only 1.3 mm, better a maximum of 1.1 mm and/or expressed in relative values, this radial distance A should be a maximum of 10%, better a maximum of 8%, better be at most 5% of the diameter d of the inner peripheral surface 13'' at this longitudinal position.

As can be seen, the retaining clip 2 can be designed in one piece and in particular can be an injection molded part made of plastic, for example polyoxymethylene.

The material of the retaining clip 2, preferably including the retaining tooth 18, should have a Shore hardness of 80-85 and/or a tensile strength of 60-80 MPa, in particular 65-75 MPa and/or a tensile modulus of elasticity of 3.0-3 .2 GPa, as this has proven to be optimal in practice.

The retaining clip 2 can also have a fastening area 2b, which serves to fasten the retaining clip 2 in a form-fitting manner to the receiving area 1a of the component carrying the retaining clip 2, such as the profile rail 1 described.

The fastening area 2b is preferably located on the side of the retaining clip 2 facing away from the insertion opening 22 and the inlet area 20 of the retaining clip 13.

For fixing, the fastening area 2b has a fastening extension 19 that fits in particular into the receiving area 1a.

It is preferably mushroom-shaped with a head 19b at its free end that is wider than the foot 19a - preferably having a cross-section in the shape of a cross - so that the broad head 19b fits into the undercut of the undercut recess such as the undercut groove 6 of the profile rail 1 and the narrower foot 19a through the open side of the groove 6 after can extend outside. As a result, the retaining clip 2 can no longer be pulled laterally out of the profile rail 1 transversely to the main extension direction 1' of the profile rail.

So that the retaining clip 2 can not only be pushed into such a groove 6 from the open front end, but can also be introduced transversely into the groove 6 at any longitudinal position of the profile rail 1, the head 19b is elongated in the top view of the head and dimensioned so that it can be inserted transversely into the groove 6 in a first rotational position of the retaining clip 2 about the direction of its foot 19a and, after rotating it about the direction of the foot 19a by about 90°, it can be positively secured in the groove 6 into a second rotational position against being pulled out in the transverse direction to the main direction of extent 1' of the profile rail 1.

For this purpose, the two opposite, shorter end edges of the head 19b in the longitudinal direction 10 of the retaining clip 2 in the plan view of the head 19b are preferably formed at an angle to the other two end edges, which run in the first transverse direction 11.1, which is perpendicular to the longitudinal direction 10, in particular convex curved.

As a result, on the one hand, the length of the head 19b - viewed in the direction of the foot, the 2nd transverse direction 11.2 - measured in the direction of the two long end edges is almost as large as the width of the undercut groove 6 in the undercut area, so that the screwed-in retaining clip in the wide direction of the undercut groove 6 has virtually no more play, and yet insertion in the transverse direction in a 1st rotational position and turning 90° into the 2nd rotational position is possible.

In order to prevent the retaining clip 2 from turning back into the rotational position in which it would be possible to pull it out in the transverse direction, the fastening area 2b also has latching lugs 26, which are arranged and dimensioned in such a way that, after the secured rotational position has been reached, they are behind the flanks of the open Latch on the side of the groove 6 and prevent turning back, as in 5c implied.

The retaining clip 2 preferably also has a base plate 12 on the front side 12a of which the retaining clip 13 is located and on the rear side 12b of which the fastening area 2b with the fastening extension 19 is optionally located.

The base plate 12 can be an integral part in particular of the C-shape of the retaining clip 13 and thus form its bottom 13a, as best shown in 5a to recognize, with a lateral projection of the base plate 12 on the retaining clip 13 is not necessary, which for example in the design of 6 and 7 the case is.

A base plate 12, which is wider than the retaining clip 13 in the assembled state in the direction of extension 1′—which is usually also the first transverse direction 11.1 of the retaining clip 2 when the retaining clip 2 is assembled—of the profile rail 1 causes the retaining clips 13 to become more adjacent Retaining clips 2 held at a desired distance, and if this is not sufficient, in the rail 1 between the retaining clips 2 spacers 3 - see 1d - Are arranged, which consist of a base plate 12 with a mounting portion 2b, ie with a mounting extension 19, but have no retaining clip 13 on the front side 12a.

The retaining clip 13 can also be at a distance from the base plate 12 with its bottom 13a, in that spacer webs 14 and, if necessary, stiffening webs 15 running transversely thereto keep these two parts at a distance from one another - even if they are formed in one piece with one another, as for example in 1b apparent.

• Vorzugsweise besitzt die Innenumfangfläche 13'' zumindest über einen Teil ihrer in Längsrichtung 10 gemessenen Länge die Querschnittsform eines Kreissegmentes 23 und/oder die Innenumfangfläche 13'' ist symmetrisch zu einer durch die Mitte der Einschuböffnung 22 einerseits sowie in Längsrichtung 10 andererseits verlaufenden Symmetrieebene 10'', was die Herstellung und Benutzung stark vereinfacht.

The exact shape of the retaining clip 13 is also important for the desired result:

• The inner peripheral surface 13'' preferably has the cross-sectional shape of a segment of a circle 23 over at least part of its length measured in the longitudinal direction 10 and/or the inner peripheral surface 13'' is symmetrical to a plane of symmetry 10' running through the center of the insertion opening 22 on the one hand and in the longitudinal direction 10 on the other. ', which greatly simplifies manufacture and use.

The interior space 13* of the retaining clip 13 preferably does not have the same cross section over the entire length, but has a constriction 21 or a narrowest, cylindrical region 21 with a very small cross section.

A conical area 13a'' preferably follows this narrowest area 21 or the constriction 21 running in the longitudinal direction 10, preferably in the push-through direction 10b, and in the other direction preferably a cylindrical area 13b'' or also a conical area 13a", which can be very useful for reasons of production in the injection molding process in order to be able to make the injection mold as simple as possible.

The holding teeth 18 are preferably all, at least several, arranged distributed over the circumference at the same longitudinal position, so that their holding edges 18 'in a common holding edge plane 18''are and the holding teeth 18 of extend there into the region of the inner peripheral surface 13'' with the smaller conicity, preferably into the cylindrical region 13b'', whereby the resistance in the push-through direction 10b is minimized.

The holding edge plane 18'' is preferably arranged in the longitudinal direction 10 at the constriction 21 or in the narrowest area 21.

The holding teeth 18 are preferably only arranged on a holding edge plane 18'' lying transversely, in particular perpendicularly, to the longitudinal direction 10.

If there are several retaining teeth 18, in particular in a retaining edge plane 18", these are preferably arranged symmetrically to the plane of symmetry 10", which causes the braking force to be applied uniformly to the GF tube 100. An even number of retaining teeth 18 is therefore preferably present in the retaining clip 2 .

A plurality of retaining teeth 18 are preferably of identical design, in particular all retaining teeth 18 on a retaining clip 2 are of identical design.

There are preferably exactly four retaining teeth 18 per retaining edge plane 18" or in total in the retaining clip 2, two on each side of the symmetry plane 10" running in the longitudinal direction 10 and through the center of the insertion opening 22.

These four retaining teeth 18 are preferably arranged symmetrically to a transverse plane of symmetry 11" that runs in the longitudinal direction 10 but perpendicularly to the plane of symmetry 10", i.e. parallel, for example, to the first transverse direction 11.1 or to the base plate 12.

This transverse plane of symmetry 11" is offset V away from the center of curvature 23' of the circle segment 23 or the central axis 23' of curvature--usually running in the longitudinal direction 10--of the longitudinal sections of the inner peripheral surface 13", which are in the form of a circle segment and are aligned with one another. preferably on the side of this center of curvature or the center axis of curvature facing away from the base 13a of the retaining clip 13 . This arrangement prevents the GF tube 100 from being unintentionally pulled out of the retaining clip 13 .

Since the offset V is between 3% and 5% of the diameter d of the inner circumference of the retaining clip 13 at the longitudinal position of the retaining edges 18', the GF tube 100 is only slightly or not at all subjected to force in the direction of the base 13a of the retaining clip 13 and therefore not deformed by the bottom 13a.

Viewed in the longitudinal direction 10, the lengths of all holding edges 18' arranged in a holding clip 13 should preferably total between 12% and 17% of the diameter d of the inner circumference at the longitudinal position of the holding edges 18', regardless of whether they are all at the same Longitudinal position are arranged in the longitudinal direction 10 or are distributed over several longitudinal positions.

This dimensioning also depends on the choice of material and its material parameters of retaining lug 18 on the one hand and GF tube 100 on the other.

Furthermore, at the free end edges of the C-shaped retaining clip 13 there can be an end web 24 which extends approximately in the longitudinal direction 10 .

These two end webs 24 each have an inner surface 24a pointing towards the other end web 24, which together connect the inlet area 20, which narrows radially inward, for the insertion of a GF tube 100 and through the insertion opening 22, which is the narrowest point of the inlet area 20 , form.

The opening angle 16 of the retaining clip 13, ie in particular the angle between the two inner surfaces 24a, is preferably between 90° and 170°, in particular between 100° and 130°, which does not make it too difficult to insert the GF tube.

The front surfaces 24b that extend outwards on these inner surfaces 24a, i.e. away from the inlet area 20 in the circumferential direction, preferably at a right angle thereto, do not run in the longitudinal direction 10, but rather have a distance from the central axis of curvature 23' that decreases in the push-through direction 10b. which serves to stabilize the free end edges of the retaining clip 13 .

2 shows a second place of use of the retaining clips 2 described above.

An end plate 5 is screwed on to the ends of the profile rails 1 pointing towards the open side of the cable distribution cabinet 101, standing transversely to the main direction of extension 1', which has at least one, here two, openings which are dimensioned and designed in such a way that in these each a retaining clip 2 with his Attachment area 2a can be positively fixed by plugging and rotating.

3 shows a 3rd place of use in which a retaining clip 2 with its clamp area 2a, i.e. its retaining clamp 13, is pushed from the side onto a GF tube 100 directly above the base plate 103 and a strain relief for this GF tube is achieved by striking this base plate 100 offers. The lateral guiding function is provided by the hole in the bottom plate 103 through which the GF tube 100 extends.

The retaining clip 2 is not fixed anywhere except on the GF tube 100 and therefore does not require a fastening area 2b. Nevertheless, the retaining clip 2 of the first design, ie with a fastening area 2b, could also be used at this point.

Such a modified design of the retaining clip 2 shows the 6 in perspective view and the 7a, b , c in top view and in different side views.

It can be seen that the attachment extension 19 is completely missing.

Instead, a recess 25a is introduced into the retaining clip 2 from the rear of the base 13a facing away from the interior 13* of the retaining clip 13 as a gripping area 25, which serves to insert and hold a tool W, preferably a bladed screwdriver W.

As a result, the retaining clip 2 can be placed with its retaining clip 13 pointing forward onto the tip of such a tool W and in this way also onto a GF tube 100 which is not in the frontmost plane of GF tubes towards the viewer 100 according to 3 sits, but further back and because of the small distances between the GF tubes 100 in the front levels could not be reached with the fingers.

Preferably, the recess 25a - which in this case extends into the interior 13* of the retaining clip 13, although this is not a requirement - is delimited by two elastic flanks 27a, b which, due to their material elasticity, hold the blade of the screwdriver W more firmly between them than just due to material friction.

Reference List

1.1*

profile rail

1'

Main extension direction

1a, b

recording area

1c

mounting area

2, 2'

retaining clip

2a

bracket area

2 B

mounting area

3

spacers

4

mounting plate

4a - d

area

5

endplate

5a

mortise

6

groove

7

mounting leg

8th

male extension

9

passage opening

10

longitudinal direction

10"

plane of symmetry

10a

strain relief direction.

10b

push-through direction

11.1

1. Transverse direction

11.1"

transverse plane of symmetry

11.2

2. Transverse direction

12

base plate

12a

front

12b

back

13

retaining clip

13"

inner peripheral surface

13a"

conical section

13b''

cylindrical section

13*

inner space

14

spacer bar

15

stiffening bar

16

opening angle

17

rail legs

18

Strain relief element, retaining tooth

18'

retaining edge

18a

Inner surface

18a1,18a2

front section

18a1,18a2

back section

19

attachment extension

19a

Foot

19b

head

20

inlet area

21

bottleneck, narrowest area

22

insertion opening

23

circle segment

23'

central axis of curvature

24

end bar

24a

Inner surface

24b

front face

25

gripping range

25a

recess

26

detent

27a, b

elastic flank

100

GF tubes

101

cable distribution cabinet

102

back panel

103

bottom plate

104

Gas Water Blocker

105

passage opening

a

Anterior Section Angle

β

Back Section Angle

A

Distance

i.e

diameter

r1

rounding radius

r2

radius of curvature

V

offset

W

Tool

Claims (35)

Retaining clip (2) with - a clip area (2a) with a C-shaped retaining clip (13) with an inner peripheral surface (13") and an interior space open on both sides in the longitudinal direction (10) and a lateral insertion opening (22) for receiving a glass fiber Tube (100), characterized by - at least one strain relief element (18) comprising an inner surface (18a) on or in the retaining clip (13). retaining clip (2). claim 1 , characterized in that - the strain relief element (18) is designed in such a way that it only holds the GF tube (100) in one longitudinal direction (10), the strain relief direction (10a), and forms a strain relief, - in particular in the opposite direction directed pushing-through direction (100b) of a relative movement of the GF tube (100) to the retaining clip (2) as little resistance as possible. Retaining clip (2) according to one of the preceding claims, characterized in that - the strain relief element (18) is a retaining tooth (18) protruding from the inner peripheral surface (13'') of the retaining clip (13) into its interior (13*), - whose inner surface (18a) facing the interior space (13*) has a holding edge (18') viewed in the side view of the holding tooth (18). Retaining clip (2) according to one of the preceding claims, characterized in that - the inner surface (18a) comprises a plurality of surface sections (18a1, 18a2), in particular one behind the other in the longitudinal direction (10), retaining clip (2). claim 3 and claim 4 , characterized in that - the inner surface (18a) has a front section (18a1) pointing in the push-through direction (100b) and a rear section (18a2) pointing in the strain relief direction (10a), which meet in the retaining edge (18'), - the front section in particular (18a1) and/or rear section (18a2) transition into the inner peripheral surface (13") of the retaining clip (13) with their end facing away from the retaining edge (18'). retaining clip (2). claim 5 , characterized in that - the holding edge angle (δ) between the front section (18a1) and the rear section (18a2) is between 60° and 90°, in particular between 70° and 80°, in particular between 72 and 78°, and/or - the front section angle (α) between the front section (18a1) viewed in the side view and the longitudinal direction (10) is a maximum of 130°, better a maximum of 110°, better a maximum of 100°, better a maximum of 95°, better a maximum of 90°, and/or - the rear section angle (β) between the rear section (18a2) viewed in the side view and the longitudinal direction (10) is a maximum of 25°, better a maximum of 22°, better a maximum of 18°, better a maximum of 15°. retaining clip (2). claim 3 and one of the Claims 4 until 6 , characterized in that the radius of curvature (r1) of the holding edge (18') viewed in the side view is a maximum of 0.3 mm, better a maximum of 0.2 mm, better a maximum of 0.1 mm. retaining clip (2). claim 3 and one of the Claims 4 until 7 , characterized in that viewed in the longitudinal direction (10), the holding edge (18') - is either straight, - or is concavely curved, in particular with a radius of curvature (r2), - which is smaller than the radius of curvature of the inner peripheral surface (13") on this Longitudinal position is - is in particular a maximum of 45% of the diameter of the inner peripheral surface (13 '') at this longitudinal position. retaining clip (2). claim 3 and one of the Claims 4 until 8th , characterized in that the radial distance (A) of the holding edge (18') from the inner peripheral surface (13") is - a maximum of 1.8 mm, better a maximum of 1.5 mm, better a maximum of 1.3 mm, better a maximum of 1, 1 mm, and/or a maximum of 10%, better a maximum of 8%, better a maximum of 5% of the diameter (d) of the inner peripheral surface (13") in this peripheral area. Retaining clip (2) according to one of the preceding claims, characterized in that - the retaining clip (2) is produced in one piece and is in particular an injection molded part made of plastic, - the plastic is in particular polyoxymethylene. Retaining clip (2) according to one of the preceding claims, characterized in that the material of the retaining clip (2), in particular of the retaining tooth (18), - has a Shore hardness of 80 - 85, and/or - a tensile strength of 60 - 80 MPa, in particular from 65 to 75 MPa, and/or - has a tensile modulus of elasticity from 3.0 to 3.2 GPa. Retaining clip (2) according to one of the preceding claims, characterized in that the inner peripheral surface (13") - viewed at least in part of its longitudinal extension in the longitudinal direction (10) has the cross-sectional shape of a circular segment (23), and/or - symmetrically to a through the center of the insertion opening (22) and a plane of symmetry (10") running in the longitudinal direction (10), a line of symmetry viewed in the longitudinal direction (10). Retaining clip (2) according to one of the preceding claims, characterized in that - the inner peripheral surface (13") has a narrowest area (21) or a constriction (21) with a smallest inner circumference in the longitudinal extension, - on the narrowest area (21) or the constriction (21) in the longitudinal direction (10) is adjoined in one longitudinal direction (10) by a conical area (13a") and in particular in the other longitudinal direction by a cylindrical area (13b") - in particular at the constriction in the longitudinal direction in both directions a conical area connects. retaining clip (2). Claim 13 and one of the claims 3 until 9 , characterized in that holding teeth (18) of a holding edge plane (18'') are arranged with their rear sections (18a2) in the cylindrical area (13b") or the conical area (13a") with the smaller conicity of the two conical areas . retaining clip (2). Claim 14 , characterized in that - the at least one retaining tooth (18), in particular its retaining edge (18'), is arranged in the longitudinal direction (10) in the narrowest area (21) or at the constriction (21), and/or - if there are several retaining teeth (18) these are all arranged with their holding edges (18') in the same longitudinal position, i.e. in one and the same holding edge plane (18"), and in particular with their front sections all holding teeth (18) on one holding edge plane (18" ), in particular all retaining teeth (18) of the retaining clip (2), with their front sections (18a1) pointing in the same direction. retaining clip (2). claim 12 and Claim 14 , characterized in that - if there are several holding teeth (18), there are a total of four holding teeth, in particular two on each side of the plane of symmetry (10"). retaining clip (2). Claim 16 , characterized in that - the four retaining teeth are arranged symmetrically to a transverse plane of symmetry (11'') which is in the longitudinal direction and perpendicular to the plane of symmetry (10''), - the transverse plane of symmetry (11'') away from the curvature center point (23') of the circular segment (23) or the central axis (23') of curvature of the longitudinal sections of the inner peripheral surface (13") which are in the form of a circular segment and are aligned with one another. retaining clip (2). Claim 17 , characterized in that - the transverse plane of symmetry (11'') by an offset (V) from the center of curvature (23') of the circle segment (23) or the central axis (23') of curvature of the circle-segment-shaped, aligned longitudinal sections away from the inner peripheral surface (13'), - the offset (V) being between 3% and 5% of the diameter (d) of the inner periphery at the longitudinal position of the retaining edges (18'). Retaining clip (2) according to one of claims 3 until 18 , unless this claim is directly related to claim 1 or 2 is backward-related, characterized in that viewed in the longitudinal direction (10) - the lengths of all retaining edges (18') of retaining teeth (18) arranged in a retaining clip (13) total between 12% and 17% of the diameter (d) of the inner circumference of the Inner peripheral surface (13'') at the longitudinal position of the holding edge plane (18'') in which the holding edges (18') are located - when the holding teeth (18) are distributed over several holding edges spaced apart in the longitudinal direction (10) - Planes (18'') as the diameter (d) the mean value of the diameters at the longitudinal positions of the retaining edge planes (18'') is chosen. Retaining clip (2) according to any one of the preceding claims, characterized in that - at the free, peripheral end edges of the C-shaped retaining clip (13) in each case an end web (24) is arranged, which extends approximately in the longitudinal direction (10), - wherein the mutually facing inner surfaces (24a) of the end webs (24) form an inlet area (20), - the front surfaces (24b) adjoining the inner surfaces (24a) to the outside, at a distance from the central axis (23' of the curvature) that decreases in the push-through direction (10b) own. Retaining clip (2) according to one of the preceding claims, characterized in that - the opening angle (16) of the retaining clip (13), in particular in the inlet area (20) between the inner surfaces (24a), between 90° and 170°, in particular between 100° and 130°. Retaining clip (2) according to one of the preceding claims, characterized in that the retaining clip (2) has a base plate (12) on the front side (12a) of which the retaining clip (13) is located and - either the base plate (12) is at least partially part of the retaining clip (13), in particular forms the bottom of the C-shape - or the retaining clip (13) is spaced apart from the base plate (12) by a spacer web (14), in particular reinforcement webs (15) to the side of the spacer web (14) between the Base plate (12) and the retaining clip (13) extend so that an expansion of the retaining clip (13) is made more difficult. retaining clip (2). Claim 22 , characterized in that the base plate (12) in the first transverse direction (11.1) to the longitudinal direction (10) protrudes laterally over the retaining clip (13) or the rest of the retaining clip (13). Retaining clip (2) according to one of the preceding claims, characterized in that - the retaining clip (2) has a fastening area (2b) for positively fastening the retaining clip (2) to a receiving area (1a) of a component (1) carrying the retaining clip (2). - in particular on the side of the retaining clip (2) facing away from the insertion opening (22), - in particular on the rear side (12b) of the base plate (12) facing away from the retaining clip (13). retaining clip (2). Claim 24 , characterized in that - the fastening area (2b) has a fastening extension (19) that fits into the receiving area (1a), - in particular the fastening extension (19) is mushroom-shaped with a head (19b) that is wider than the foot (19a) on its free end, - in particular the end edge of the head (19b) of the attachment extension (19) extending in the 1st transverse direction (11.1) runs obliquely and/or convexly curved to the 1st transverse direction (11.1), in particular in the case of an inclined position with an inclined position angle of at least 10°, better at least 15°. Retaining clip (2) according to one of the above claims 24 or 25 , characterized in that - the fastening area (2b) comprises locking lugs (26) for locking behind the lateral flanks of an, in particular undercut, receiving groove in the receiving area (1a) of a component (1) carrying the retaining clip (2). Retaining clip (2) according to one of the preceding claims, characterized in that - on the back of the retaining clip (13) there is a gripping area (25) for gripping the retaining clip (2), in particular by means of a tool (W), - preferably the Gripping area (25) comprises a recess (25a), in particular a blind hole (25a), for inserting a tool (W), such as a blade screwdriver, with the recess (25a) in particular becoming increasingly narrower in its cross-section in the depth direction, elastic flanks (27a, b) are preferably present on both sides in the recess (25a). Fastening device for the GF tubes (100) of glass fiber cables running in the longitudinal direction (10) in cable distribution cabinets (101), with retaining clips (2) according to one of the preceding claims, with - at least one in the 1st transverse direction (11.1) of the retaining clips (2) running profile rail (1), - a number of retaining clips (2) fastened in a form-fitting manner along the profile rail (1), characterized in that - the profile rail (1) with one of its end faces, in particular only with one of its end faces, on a transverse their main extension direction (1 ') ver running receiving part, in particular a receiving plate (4), is screwed, - in particular the profile rail (1) in its main extension direction (1') is completely covered with retaining clips (2) and/or sliding placeholders (3). fastening device claim 28 , characterized in that - the end face of the profile rail (1) opposite the receiving part when fastened at only one end is closed by an end plate (5), - which is screwed or latched in particular into the end face of the profile rail (1), and/ or - on which in particular a retaining clip (2) is attached. fastening device claim 28 or 29 , characterized in that - the profile rail (1) has several separate receiving areas (1a, b) lying next to each other, in particular one above the other in the direction of extension and/or - the receiving area (1a, b) is an undercut groove (6) which is open towards the front and the fastening area (2b) of the retaining clip (2) and the spacer (3) is at least one fastening extension (19) which fits into the groove (6). Fastening device according to one of claims 28 - 30 , characterized in that - the profile rail (1) apart from the receiving area (1a), in particular above and below the receiving area (1a), in particular the undercut groove (6), each have a fastening area (1c), in particular a C-shaped fastening area ( 1c) for screwing to the receiving part, in particular the receiving plate (4) and/or fastening an end plate (5). Cable distribution cabinet with a fastening device for GF tubes (100), characterized in that the fastening device according to one of claims 28 - 31 is trained. Construction kit for producing a fastening device according to one of the preceding claims 28 until 31 in cable distribution cabinets (101) with - at least one type of profile rails (1) with a receiving area (1a) for positively slidable receiving of retaining clips or sliding placeholders (3), - several types of retaining clips (2) with a clip area (2a) for positively locking Accommodating a GF tube (100) and a fastening area (2b) for positive fastening in the profile rail (1), in particular with different diameters of the clamp areas (2a) but the same fastening areas (2b). construction kit Claim 33 with - at least one type, in particular several types, of profile rails (1) and in particular end plates (5) which can be fastened to their end faces, and/or - at least one type, in particular several types, of a receiving part, in particular mounting plate (4), for fastening the profile rails (1). Construction set according to one of the preceding construction set claims, characterized in that - the construction set comprises spacers (3) and the spacers (3) have a base plate (13) and fastening extensions (19') projecting rearwardly from this and which fit into the receiving area ( 1a) of the profile rail (1) fit - which are in particular identical to the attachment extensions (19) of the retaining clips (2).

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