EP0141423B1 - Moyens pour atténuer l'effort de tension sur un câble - Google Patents

Moyens pour atténuer l'effort de tension sur un câble Download PDF

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Publication number
EP0141423B1
EP0141423B1 EP84113419A EP84113419A EP0141423B1 EP 0141423 B1 EP0141423 B1 EP 0141423B1 EP 84113419 A EP84113419 A EP 84113419A EP 84113419 A EP84113419 A EP 84113419A EP 0141423 B1 EP0141423 B1 EP 0141423B1
Authority
EP
European Patent Office
Prior art keywords
shaped
wire
cable
wedge
clamping gap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84113419A
Other languages
German (de)
English (en)
Other versions
EP0141423A1 (fr
Inventor
Ernst Hans Erwand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rutsatz Karl-Heinz Dr
Original Assignee
Rutsatz Karl-Heinz Dr
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rutsatz Karl-Heinz Dr filed Critical Rutsatz Karl-Heinz Dr
Priority to AT84113419T priority Critical patent/ATE28110T1/de
Publication of EP0141423A1 publication Critical patent/EP0141423A1/fr
Application granted granted Critical
Publication of EP0141423B1 publication Critical patent/EP0141423B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/585—Grip increasing with strain force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/56—Insulating bodies
    • H01B17/58—Tubes, sleeves, beads, or bobbins through which the conductor passes

Definitions

  • the invention relates to a device for holding and relieving the force of lines and cables according to the preamble of claim 1.
  • a device of the generic type is used above all for fixing electrical cables surrounded by an insulation jacket, that is to say, for example, for fixing conventional connecting cables which are round in cross section or ribbon cables.
  • the device can be provided as a cable clamp for the connecting lines of electrical devices.
  • a clamp is usually used, which can be fastened to the plug housing with one or two screws. After the connection cable to be fixed has been carried out between the connector housing and the clamping bracket, the clamping bracket is brought so far against the connection cable and its insulation jacket through the screw connection that a firm seat is created in both directions. This results in strain relief for the connecting cable in both directions.
  • a disadvantage of this conventional type of device and cable clamp is that the assembly process with screwing on the clamping bracket, inserting the connecting cable and re-screwing is very time-consuming and therefore costly. On the other hand, it is often found after stripping the electrical lines to be connected that the length of the electrical conductor remaining between the cable clamp and the connecting pole or connecting pin is too long or too short. In these cases in particular, the cable clamp must be loosened and fastened again.
  • the entire plug must be replaced if the cable clamp is damaged.
  • this is usually fixed to the connector with two screws, so that both screw connections for fastening and strain relief of the connecting cable must be actuated.
  • the cable clamp consists of an essential ring-shaped frame that surrounds the cable and elastic-flexible gripping fingers, which are arranged on the ring-shaped frame and, in their untensioned state, extend obliquely in the direction of the cable path and with free ends in the region of the cable path lie, with the fingers converging in one direction along the cable path with these.
  • the diameter of the through opening which is formed by the gripper fingers resting on the cable, is reduced, thereby increasing the form-fitting engagement of the gripper fingers on the insulating jacket of the cable, so that pulling through the Cable becomes impossible.
  • the lead-through opening increases and the cable can be pulled through.
  • a disadvantage of a cable clamp of this type is that, in the case of a ring-shaped construction, the cable must be inserted by pushing the cable through the ring-shaped frame and the gripping fingers, as a result of which the cable can only be readjusted in the wedge direction of the gripping fingers, and this with approximately U- Shaped design, as described in DE-A-26 55 127, the insertion and readjustment can only be done by removing the device from the device and bending the device.
  • the invention has for its object to improve a generic device so that the implementation or insertion of lines and connecting cables can be realized easily and without screw connection, with a reliable mounting of the line introduced into the device and its Strain relief against forces directed away from the connection object is guaranteed.
  • the main idea of the invention is to provide the device or cable clamp with two wedge-shaped mutually opposing holding areas, which form a clamping gap for the cable to be carried out or inserted by the at least slight spreading of the holding areas resulting from the material tension holding force is exerted on at least one peripheral area of the line.
  • the material stiffness is chosen in accordance with the material thickness of the holding areas so that when a tensile force is exerted on the line in the direction of the wedge configuration of the holding areas, the line can be pulled against the holding force through the clamping gap formed between the holding areas.
  • the device With a view to simple assembly, it is particularly advantageous to make the device essentially U-shaped open.
  • the plane of the U-shape is perpendicular to the longitudinal extension of the line.
  • the U-shaped opening of the device is aligned with the clamping gap formed between the holding areas in such a way that the line or the cable can be inserted into the device approximately perpendicular to its longitudinal extent.
  • the opening of the U-shape is usually kept larger than the width of the clamping gap. This is intended to keep the insertion force in the direction of the clamping gap extension as low as possible.
  • the holding areas on the side of the U-shaped opening are chamfered, so that a continuous, more or less strong spreading of the holding areas on the clamping area takes place when the cable is inserted.
  • the ends of the holding areas are advantageously wedge-shaped, the one outer surface being largely perpendicular to the cable extension.
  • a punctiform or linear engagement with the insulation jacket is achieved in this way.
  • This embodiment facilitates on the one hand a frictional pulling through of the cable in the direction of the wedge shape and on the other hand offers the guarantee that an immediate narrowing movement of the holding areas relative to one another with a type of self-locking clamping action against the cable is achieved with a tensile force contrary to the wedge shape.
  • a clamping gap formed by holding areas can be produced on both sides of the fastening area, particularly in the case of a U-shaped design of the device.
  • the holding areas or clamping gaps are preferably formed mirror-symmetrically to the central plane of the fastening area. This symmetrical design ensures strain relief in both directions.
  • the fixed cable can be removed with a subsequent shift in length with a simple handle. Such removal can be necessary to adjust the length of the connection points of the electrical conductors. Such a length shift may also be necessary due to the wear of the insulation jacket resulting from the tensile load in a certain area.
  • the device can also have a closed fastening area, in which case the cable end must be pushed through the opening and the clamping gap in the wedge direction.
  • two holding areas are provided, which are arranged at an angle of preferably 90 ° to one another.
  • This wedge angle is dependent on the material rigidity, the geometric dimension of the arrangement area of the strain relief, the desired holding and clamping force, can be changed to an obtuse or more acute angle.
  • the full function of the device is fulfilled by two flat webs of approximately the same length, the edge of which is rectilinear at the clamping gap. In a change to this, this edge can also have a partial form fit, e.g. B. as a pitch circle for the cable to be jammed. In this case there is an exact position fixation in the clamping gap, which is otherwise guaranteed by the holding or clamping forces.
  • more than two retaining webs can be provided, which, however, must leave the insertion plane of the cable free.
  • the device is preferably made of a plastic which has high dimensional stability and is in particular electrically insulating.
  • the device is advantageously produced as a separate, one-piece part which has a complementary, form-fitting fastening area with a larger device unit.
  • the device can of course be integrated as part of the small device.
  • an ABS plastic or a polycarbonate PC can be selected as the material.
  • a reinforcing rib is preferably provided on the connection area of the U-shape, in the direction of the holding areas.
  • the reinforcing rib gives the device a particularly high material stability, so that the spreading forces occurring when a cable is inserted into the clamping gap can be better absorbed and cracking in the material is avoided.
  • the edge of the holding areas at the clamping gap can also have a curvature course, optionally ribbed, in the longitudinal direction of the cable.
  • the device has the particular advantage that, as a separate or integrated line or cable clamp designed in a larger housing unit, without screw fastening and simple installation of the cable to be inserted, strain relief is possible on one or both sides.
  • a length shift of the cable can be implemented easily and in the shortest possible time.
  • the device is made in one piece from a relatively rigid plastic and can be used as a cable clamp 1 with strain relief.
  • the cable clamp 1 essentially has a U-shaped fastening area 5, between the two legs 8 and 9 of which an opening 10 is formed.
  • the cable clamp 1 is shown in plan view of the surface facing away from its holding areas 2 and 3.
  • the periphery of the cable clamp 1 is at least essentially a complementary form to the arrangement area in the associated larger device unit.
  • the outer regions running vertically in FIG. 1 are preferably designed as stepped guide surfaces 11.
  • the cable clamp 1 can be positively inserted in a holder of the larger device unit, e.g. B. a connector.
  • the cable clamp 1 is preferably inserted into the larger device unit in the direction of the base region 16 of the U-shape.
  • the opening 10 of the cable clamp 1 is kept substantially larger than the through-opening for a corresponding line or a cable which is designed as a clamping gap 4 at the ends of the holding areas 2 and 3.
  • the holding areas 2 and 3 extend in a wedge shape against one another, the angle enclosed between the holding areas preferably being 90 °.
  • the inner transition between the holding areas 2 and 3 and the corresponding legs 8 and 9 is shaped as a rounding 23, so that the expansion forces upon enlargement of the clamping gap 4 or forces resulting from a strain relief when narrowing the clamping gap 4 better from the shape Fastening area can be transferred.
  • the holding areas 2 and 3 provided for power transmission and strain relief of the cable are provided symmetrically to the vertical axis of the cable clamp 1, which follows the section line 11-11 in FIG. 1.
  • the holding areas 2 and 3 are formed on the fastening area 5 only in the area of the U-legs 8 and 9, respectively.
  • the holding areas engage approximately in the middle area of the U-legs and are kept somewhat shorter than the total length of the legs 8 and 9 when fully functional.
  • the holding areas can be 2 and 3 are accordingly characterized approximately as plate-shaped spreading surfaces which form the clamping gap 4 between their inner edge which runs approximately parallel to the vertical axis.
  • a stiffening web 15 is formed on the base region 16, projecting approximately perpendicularly from it in the direction of the extent of the holding regions 2 and 3, and is essentially triangular in plan view according to FIG. 3 .
  • This stiffening web 15 serves to better absorb the spreading forces acting on the U-shaped fastening area 5.
  • the stiffening web 15 also simultaneously takes on the function of a stop or contact surface of the cable inserted into the clamping bead 4 and not shown in the example.
  • the wedge-shaped and tongue-like holding areas 2 and 3 preferably have a slightly smaller material thickness than the U-shaped fastening area 5.
  • the outer surface 19 of the holding areas 2 and 3 facing away from the fastening area 5 in the area of the clamping gap 4 is bevelled approximately parallel to the base area 16 .
  • the edge of the holding areas 2 and 3 is designed as a wedge tip, which brings about a good holding and clamping fit with the insulation jacket, particularly in the case of an insulation jacket of the cable consisting of an elastomer.
  • the length of the triangular stiffening web 15 is in the embodiment in the vertical direction, the U-shaped fastening area 5 is kept shorter than the extent of the holding areas 2 and 3 in this direction.
  • the holding areas 2 and 3 have beveled surfaces 21 on the side facing the opening 10, which result in a funnel-shaped guidance in the direction of the clamping gap 4.
  • the attachment of a cable of the cable clamp 1 is preferably carried out in such a way that the cable, not shown, is first introduced into the U-shaped opening 10 with a longitudinal extension into the plane of the drawing when the cable clamp 1 is arranged according to FIG. 1.
  • the insulation jacket of the cable comes into engagement with the chamfered surfaces 21 of the holding areas 2 and 3.
  • the cable is continuously pushed into the holding and clamping gap 4 in cross-section. Since the clamping gap 4 is smaller than the smallest outer diameter of the cable to be used, the tongue-like holding areas 2 and 3 are more or less spread apart at least in the area of the clamping gap.
  • the frictional application of the holding areas to a part of the outer circumferential surface of the cable fixes the position with sufficient accuracy, but the cable can be pulled through the clamping gap 4 in this direction when a force acts in the wedge direction of the holding areas.
  • the force required for this depends on the diameter relations of the cable or the clamping gap as well as on the choice of material, the material thickness and the angular position of the holding areas.

Landscapes

  • Installation Of Indoor Wiring (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Insulated Conductors (AREA)

Claims (7)

1. Dispositif (1) permettant de maintenir les conduites et les câbles et de les soulager de leur charge, notamment de réduire la charge de traction subie par les câbles de raccord isolés dans des appareils électriques, l'installation comportant, entre l'appareil et le dispositif (1), au moins un dispositif de fixation par serrage, et le dispositif (1) comprenant au moins deux zones de maintien (2, 3) qui sont disposée, l'une par rapport à l'autre de manière à forme, un coin, et qui, ensemble, délimitent une ouverture (4) pour le passage de la conduite, et une zone de fixation (5) ayant essentiellement une forme en U, et les zones de maintien (2, 3) se mettant en prise l'une avec l'autre lorsqu'une force agit sur la conduite dans le sens opposé au sens du coin, de manière à rétrécir et/ou à bloquer par encastrement l'ouverture de passage (4), caractérisé en ce que les zones de maintien (2, 3), au nombre de deux au moins, qui sont disposées l'une par rapport à l'autre de manière à former un coin, sont réalisées par formage sur les deux branches (8, 9) de la zone de fixation (5) en forme d'U de telle manière que l'ouverture de passage (4) soit une fente de serrage perpendiculaire à l'axe du câble.
2. Dispositif selon la revendication 1, caractérisé en ce que les zones de maintien (2, 3) comportent chacune, du côté ouvert (10) de la zone de fixation (5) en forme d'U, une partie oblique d'introduction (21) qui aboutit à la fente de serrage (4),
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que les zones de maintien (2, 3) sont réalisées au niveau de la fente de serrage (4), transversalement par rapport à la direction longitudinale de la conduite introduite, de manière à former un coin et comportant une surface (19) sensiblement perpendiculaire à la direction de la conduite.
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que les zones de maintien (2, 3) au moins sont constituées par une matière plastique de forme rigide, notamment électriquement isolante.
5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que les deux côtés de la zone de fixation ouverte (5) en forme d'U comportent chacun, dans la direction de la conduite, deux zones de maintien associées, délimitant ensemble une fente de serrage.
6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que la base (16) de la zone de fixation (5) en forme d'U comporte une partie de renforcement saillante (15) sensiblement perpendiculaire au dispositif de liaison à branches en U.
7, Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que le dispositif est réalisé d'une seule pièce ou fait partie intégrante d'un appareil.
EP84113419A 1983-11-08 1984-11-07 Moyens pour atténuer l'effort de tension sur un câble Expired EP0141423B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113419T ATE28110T1 (de) 1983-11-08 1984-11-07 Vorrichtung zur kraftentlastung von leitungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3340341 1983-11-08
DE19833340341 DE3340341A1 (de) 1983-11-08 1983-11-08 Vorrichtung zur kraftentlastung von leitungen

Publications (2)

Publication Number Publication Date
EP0141423A1 EP0141423A1 (fr) 1985-05-15
EP0141423B1 true EP0141423B1 (fr) 1987-07-01

Family

ID=6213743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113419A Expired EP0141423B1 (fr) 1983-11-08 1984-11-07 Moyens pour atténuer l'effort de tension sur un câble

Country Status (3)

Country Link
EP (1) EP0141423B1 (fr)
AT (1) ATE28110T1 (fr)
DE (2) DE3340341A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4626962A (en) * 1985-05-30 1986-12-02 Motorola, Inc. Circuit board assembly with built in wire gripper
GB2202096B (en) * 1986-12-16 1991-07-24 G S Curtis A radially wired 13amp 250v electrical connector.
GB8707877D0 (en) * 1987-04-02 1987-05-07 Amp Great Britain Cable clamp
DE4116911A1 (de) * 1991-05-18 1991-10-24 Elektroinstallation Ruhla Gmbh Vorrichtung zur zugentlastung beweglicher elektrischer leitungen
GB2261775B (en) * 1991-11-05 1996-04-03 Kevin Andrew Kingston Grip for an electrical cable
FR2711864A1 (fr) * 1993-10-22 1995-05-05 Athouel Colette Interrupteur de courant électrique à commande sensitive.
JP3120361B2 (ja) * 1995-10-26 2000-12-25 モレックス インコーポレーテッド 光ファイバーケーブル用コネクタ
DE102006049563B3 (de) 2006-10-20 2008-04-17 Tyco Electronics Amp Gmbh Steckverbinder mit verbesserter Kabelzugentlastung
GB2449310B (en) * 2007-05-18 2009-05-20 Legrand Electric Ltd Floor box

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258493B (de) * 1964-12-10 1968-01-11 Baer Elektrowerke G M B H Zugentlastungsklemme fuer elektrische Kabel
US3683319A (en) * 1970-10-27 1972-08-08 Amp Inc Notched plate clasp apparatus
DE7114333U (fr) * 1971-04-08 1971-07-22 Licentia Gmbh
JPS5317520Y2 (fr) * 1973-09-25 1978-05-10
DE2443123A1 (de) * 1974-09-09 1976-03-18 Siemens Ag Anschlussvorrichtung fuer ein koaxialkabel
DE2655127A1 (de) * 1975-12-16 1977-06-30 Itw Ltd Kabelklemme
DE2923812A1 (de) * 1979-06-12 1980-12-18 Tuomas Kerttunen Anschlusstutzen zum befestigen einer elektrischen leitung in einer verteilerdose o.dgl.

Also Published As

Publication number Publication date
DE3340341C2 (fr) 1990-10-11
EP0141423A1 (fr) 1985-05-15
DE3464528D1 (en) 1987-08-06
ATE28110T1 (de) 1987-07-15
DE3340341A1 (de) 1985-06-27

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