EP0196942A1 - Verfahren und Vorrichtung zur Verbindung der metallenen Schutzmäntel von Fernmeldekabeln - Google Patents

Verfahren und Vorrichtung zur Verbindung der metallenen Schutzmäntel von Fernmeldekabeln Download PDF

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Publication number
EP0196942A1
EP0196942A1 EP86400442A EP86400442A EP0196942A1 EP 0196942 A1 EP0196942 A1 EP 0196942A1 EP 86400442 A EP86400442 A EP 86400442A EP 86400442 A EP86400442 A EP 86400442A EP 0196942 A1 EP0196942 A1 EP 0196942A1
Authority
EP
European Patent Office
Prior art keywords
sheath
jaw
connection
metal
jaws
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.)
Withdrawn
Application number
EP86400442A
Other languages
English (en)
French (fr)
Inventor
Paul Nuss
Jean Lérot
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.)
Goro SA
Original Assignee
Goro SA
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 Goro SA filed Critical Goro SA
Publication of EP0196942A1 publication Critical patent/EP0196942A1/de
Withdrawn legal-status Critical Current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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/646—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for cables or flexible cylindrical bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/22—End pieces terminating in a spring clip
    • H01R11/24—End pieces terminating in a spring clip with gripping jaws, e.g. crocodile clip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands

Definitions

  • the present invention relates to the connections made on the metal sheaths for protecting telecommunications cables, either to ensure a conductive connection between two of these sheaths, or to connect one of these to earth.
  • the sheaths of this kind are arranged around the quarters of telecommunications cables in order to ensure the flow of high intensity currents, such as lightning currents towards the earth.
  • These sheaths are formed by a thin tubular aluminum envelope; or other suitable metal, on the external face of which a plastic coating is attached.
  • an external plastic sheath is arranged around the assembly, this sheath being relatively thick.
  • connection clamps one of the jaws of which carries, on its internal face, several points intended to pass through the cable to connect, the other jaw having openings capable of receiving the spikes thus provided, after crossing the corresponding cable. The rest, the ends. of these points are intended to be fixed in the holes made in the corresponding jaw of these connection clamps.
  • Such clamps can effectively give satisfaction in the case of flat cables comprising one or more conductors embedded in an insulating material.
  • the presence of the thick outer sheath of plastic and the existence of the insulating coating, provided on the outer face of the metal sheath raise particular problems.
  • the object of the present invention is therefore to resolve these and to ensure as large a contact surface as possible with the connection members, without there being any need to carry out the various preparatory operations necessary in the case of the technique. usually used so far.
  • the invention firstly relates to a method of connecting metal sheaths of the type considered by pinching between two metal blades, forming clamping and connection jaws.
  • this process is characterized in that:
  • the end of such a metal sheath is clamped together and the corresponding end of the thick external plastic sheath, provided around the latter, between the two clamping jaws used, by stamping at the same time, in the metal sheath, a series of protrusions by stretching there the material of this sheath, so as to increase its contact surface with the respective jaw, and this by driving in a plurality of studs provided in projection on the clamping jaw on the inside;
  • connection device for the implementation of the method defined above.
  • This device comprises two metal blades, forming jaws intended to grip the end of such a sheath and one of which has a series of holes intended to receive projecting elements carried by the other.
  • this device is characterized in that the elements thus provided consist of studs comprising, at the end, a flat or slightly curved face, and the holes made in the first jaw have a sharp edge on the side facing the second, the studs of this second jaw being adapted to punch the external plastic sheath of a telecommunications cable by detaching therefrom a series of elements in the form of pellets, while stamping protuberances in the metal sheath, and by stretching the material these protrusions, while the sharp edge of the entry of the holes of the second jaw ensures the elimination of the plastic coating provided on the outer face of the metal sheath and the exposure thereof.
  • the present device assumes the form of a clamp and this is provided with means capable of ensuring the locking of the two corresponding jaws, in their clamping position.
  • Figures 1 and 2 illustrate the application of the connection method according to the invention to achieve a conductive connection between the protective sheaths 1 of metal of two telecommunications cables 2 each having an outer sheath 3 relatively thick in plastic material, for example polyethylene. Consequently, it uses two connection devices 4 connected by a conductive braid 5.
  • Each of these devices consists of two metal plates 6 and 7 connected by a flexible area 8 of articulation, so that these can play the role of clamping jaws and connection.
  • One of these jaws carries, on its internal face, a series of projecting studs 9 whose height h is greater than the thickness g of the outer sheath 3 of the cables 2.
  • the end face of these studs is flat or slightly curved , as is the case in the example shown in Figure 3.
  • the second jaw 7 of each connection device has a series of holes 1 0 opposite the different studs 9.
  • these holes are intended to receive the end of these various studs.
  • these holes have a sharp edge at their entry end, that is to say at the place of their end situated on the internal face of the corresponding jaw 7.
  • These holes have a section of the same contour as the studs 9, for example a circular contour. In addition, their section is only very slightly greater than that of the studs 9, at least in their part adjoining their entry end.
  • each of these holes may include a flared portion 11 following a cylindrical portion 12 whose depth p corresponds to the driving distance of the pads 9 corresponding.
  • the studs 9 sink into the internal sheath 1 of metal, then into the external sheath 3 of plastic.
  • the corresponding parts of this latter sheath are then cut by the sharp edge of the entry end of the holes 10 of the external jaw 7, inside which the end of the studs 9 engages.
  • the latter somehow play the role of punches in the outer sheath 3 by detaching therefrom a series of elements 14 in the form of a pellet, the release of which is facilitated by the flaring 11 provided in each hole 10 (see FIG. 3) .
  • the depression of the studs 9 in the metal sheath 1 has the effect of stamping therein a series of protuberances 15.
  • the formation of these protuberances is accompanied by stretching of the sheet of metal, for example aluminum, which constitutes the sheath 1 and this, as shown in FIG. 3. This results in a significant increase in the contact surface of the internal face of this sheath with the lower jaw 6, and with the surface of the studs 9 thereof.
  • the jaws of these devices can be held in the clamping position by the simple elasticity of the flexible articulation zones 8 ensuring the connection of the two jaws of these devices as well as by the wedging of the studs 9 inside the holes 10.
  • he can advantageously be provided additional clamping means for locking the two jaws of each connection device, in their clamping position.
  • FIGS. 4 and 5 represent an embodiment of the connection device according to the invention in which the two jaws 6a and 7a are articulated freely by means of an axis 16 and there is provided a clamping screw 17 allowing to lock them in the clamping position, as shown on the right-hand side of FIG. 4.
  • the structure and arrangement of the two jaws of each of the two connection devices 4a thus provided remain the same as before.
  • the jaws 6a of these devices have a series of studs 9, while the jaws 7a have a series of corresponding holes.
  • FIG. 6 represents another embodiment in which the two jaws 7b and 6b of the corresponding device are articulated via an elastic zone 8b, as in the example of FIGS. 1 to 3.
  • the 'one of these jaws in this case the jaw 6b, carries one or more hooking members 1 8 capable of ensuring its attachment to the other jaw and this, in the clamping position thereof.
  • these attachment members can be designed to engage in additional holes 19 provided in the jaw 7b.
  • FIG. 7 shows another embodiment more specifically designed to provide a conductive connection between the metal protective sheaths 1c of two telecommunications cables 2c.
  • the corresponding device consists of two rigid metal blades 6c and 7c, the ends of which are joined by clamping screws and nuts 20, so that they can be tightened on either side of the ends of the two assemblies formed by an internal sheath in metal 1c and the corresponding external sheath 3c made of plastic.
  • the first blade 6c comprises, on the internal face of each of its ends, a series of studs 9 similar to those provided in the embodiment according to Figures 1 to 3.
  • As for the second blade 7c it has a series of holes correspondents.
  • these two blades are able to play the same role as the jaws 6 and 7 of the devices shown in FIGS. 1 to 3.
  • FIG. 8 represents an embodiment specially designed to ensure the earthing of the protective sheath 1d of a telecommunication cable 2d.
  • the corresponding device takes the form of a clamp, the two jaws 6d and 7d of which can be clamped on either side of the assembly formed by the end of the metal sheath 1d and the corresponding end of the external sheath Plastic 3d - Their tightening can then be ensured by a screw and a nut 20, as in the previous embodiment.
  • the clamp thus provided is attached to the end of a conductor 21 intended to provide an earth connection.
  • FIG. 9 represents yet another embodiment, intended to provide a conductive connection between the metal sheaths 1e of two second telecommunication cables.
  • the corresponding device comprises two clips similar to those shown in Figures 1 to 3, which are connected by a conductive braid 5e.
  • Each of these clamps comprises two jaws 6 and 7, one of which carries a series of studs 9, while the other has corresponding holes.
  • This device differs from that of FIGS. 1 to 3 by the fact that it further comprises an outer sealing rod.
  • This consists of a section of tube 22 split over its entire length and which is intended to receive the corresponding ends of the two cables 2e, as shown in FIG. 9. This sleeve can then be closed and fixed on these cables, by example using cable ties.
  • this sleeve is provided with a metallized coating intended to avoid the formation of thermoelectric couples.
  • the 5th connection braid is fixed against this covering by a metal rivet 23 or any other suitable member. This has not only the role of ensuring the desired conductive connection, but also of ensuring the assembly of the sleeve 22 with the two clamps of this connection device.
  • FIGS. 10 to 12 illustrate yet another embodiment of the connection device according to the invention, which is designed to avoid the risks of creep of the external sheaths 3 of two telecommunication cables 2f.
  • the two jaws 6f and 7f over their entire length, a cross section of curved shape and these two jaws are adapted to be fitted one inside the other, the convex part of the jaw 6f being engaged inside. of the concave part of the jaw 7f. Thanks to the shape thus provided for these two jaws, one obtains, at the time of their tightening, a constraint of these two parts and parts of the two sheaths which are pinched between them, that is to say the inner sheath 1f in metal and the outer sheath 3f in plastic. To further increase this pinching, the external jaw 7f may have a more pronounced curvature than the internal jaw 6f.
  • the jaw 6f which is intended to be placed on the inner side, carries protrusions 9f similar to those provided in the other embodiments. As for the jaw 7f, it has, in concordance, holes 10f.
  • the means for securing these two jaws after tightening consist of two folding tabs 24 provided at one and the other ends of the jaw 6f. These tabs are intended to be folded over the corresponding ends of the jaw 7f after tightening (see left part of FIG. 12).
  • the jaw 7f carries, at one of these ends, a tongue 25 capable of receiving a connection clamp 26 provided at one and the other ends of a conductive braid 27 intended to make the desired electrical connection between the metallic sheaths 1f of two telecommunication cables 2f.
  • the device according to the invention can be the subject of numerous other embodiments.
  • the means for clamping the two jaws could be different from those provided in the examples described above.
  • these devices could include protruding studs of any other section, the shape of the corresponding holes being modified accordingly.

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  • Cable Accessories (AREA)
  • Processing Of Terminals (AREA)
EP86400442A 1985-03-05 1986-03-04 Verfahren und Vorrichtung zur Verbindung der metallenen Schutzmäntel von Fernmeldekabeln Withdrawn EP0196942A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8503182A FR2578694B1 (fr) 1985-03-05 1985-03-05 Procede et dispositif pour la connexion des gaines de protection en aluminium des cables de telecommunications
FR8503182 1985-03-05

Publications (1)

Publication Number Publication Date
EP0196942A1 true EP0196942A1 (de) 1986-10-08

Family

ID=9316859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400442A Withdrawn EP0196942A1 (de) 1985-03-05 1986-03-04 Verfahren und Vorrichtung zur Verbindung der metallenen Schutzmäntel von Fernmeldekabeln

Country Status (3)

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EP (1) EP0196942A1 (de)
JP (1) JPS61266004A (de)
FR (1) FR2578694B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112242616A (zh) * 2020-09-21 2021-01-19 国网河南省电力公司郑州供电公司 一种鹅颈式接地线夹
EP4087064A1 (de) * 2021-05-03 2022-11-09 3M Innovative Properties Company Kabelabschirmklemme

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10146573C1 (de) * 2001-09-21 2003-06-18 Sgl Carbon Ag Innenbelüftete Bremsscheibe aus faserverstärkten keramischen Verbundwerkstoffen mit Durchgängen
JP2023083752A (ja) * 2021-12-06 2023-06-16 株式会社オートネットワーク技術研究所 シールドユニット

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253247A (en) * 1963-12-05 1966-05-24 Minnesota Mining & Mfg Electrical connector
US3753213A (en) * 1972-01-07 1973-08-14 Thomas & Betts Corp Method and means for connecting to a metallically sheathed cable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253247A (en) * 1963-12-05 1966-05-24 Minnesota Mining & Mfg Electrical connector
US3753213A (en) * 1972-01-07 1973-08-14 Thomas & Betts Corp Method and means for connecting to a metallically sheathed cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112242616A (zh) * 2020-09-21 2021-01-19 国网河南省电力公司郑州供电公司 一种鹅颈式接地线夹
EP4087064A1 (de) * 2021-05-03 2022-11-09 3M Innovative Properties Company Kabelabschirmklemme
WO2022234362A1 (en) * 2021-05-03 2022-11-10 3M Innovative Properties Company Cable shield clamp

Also Published As

Publication number Publication date
FR2578694B1 (fr) 1987-06-26
JPS61266004A (ja) 1986-11-25
FR2578694A1 (fr) 1986-09-12

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