FR2503807A1 - Insulated tightening bolt for screw-fastening cable connectors - has shaft head with inserted hexagonal insulating plug preventing electrical contact with cable, and tightenable with allen key - Google Patents

Insulated tightening bolt for screw-fastening cable connectors - has shaft head with inserted hexagonal insulating plug preventing electrical contact with cable, and tightenable with allen key Download PDF

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Publication number
FR2503807A1
FR2503807A1 FR8107341A FR8107341A FR2503807A1 FR 2503807 A1 FR2503807 A1 FR 2503807A1 FR 8107341 A FR8107341 A FR 8107341A FR 8107341 A FR8107341 A FR 8107341A FR 2503807 A1 FR2503807 A1 FR 2503807A1
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FR
France
Prior art keywords
cable
insulated
tube
hexagonal
screw
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Withdrawn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
FR8107341A
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French (fr)
Inventor
Andre Beaurain
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.)
VERLANT ET BEAURAIN
Original Assignee
VERLANT ET BEAURAIN
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 VERLANT ET BEAURAIN filed Critical VERLANT ET BEAURAIN
Priority to FR8107341A priority Critical patent/FR2503807A1/en
Publication of FR2503807A1 publication Critical patent/FR2503807A1/en
Withdrawn legal-status Critical Current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
    • H01R4/70—Insulation of connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • 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
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Abstract

The cable connector fitting is designed to be compatible with conventional cable connectors, for example the insulation-rupturing type. A threaded shaft (10) ends in a cylindrical metal head (12) which contains a tired out section (14) of hexagonal section. A hexagonal plug of an insulating material such as plastics is fitted in that section. A metal hexagonal-sided tube (18) is sunk into the plastic plug. The whole unit is turned on its thread by a hexagonal key (20), for example an allen key. The insulating plug has a lip which covers the head of the shaft. This prevents contact between the cable and the tightening tool. Alternatively, the metal hexagonal tube is replaced by a longer version which has an accurately machined nick incorporated into it. The nick is meant to deliberately weaken the tube so that it shers under a pre-determined turning stress and does not transit a greater torque to the cable to be connected.

Description

La présente invention est relative à une vis isolée destinée plus particulièrement au serrage des éléments de connecteurs de dérivation préisolés pour lignes électriques sous tension. The present invention relates to an insulated screw intended more particularly for tightening the pre-insulated branch connector elements for live electrical lines.

Dans son brevet français n 78 25 456, déposé le 5 septembre 1978, la Demanderesse a décrit et revendiqué un connecteur de dérivation monobloc pré-assemblé qui comprend, d'une part, un corps réalisé sous la forme d'un serre-joint muni, à sa partie supérieure, de moyens de perforation de l'isolant d'un câble sous tension, et, à sa partie postérieure, d'une saillie munie d'un logement recevant le conducteur dérivé, et, d'autre part, un gousset réalisé en plusieurs parties pré-assemblées en usine sur le connecteur, et enveloppant une partie des conducteurs. In its French patent No. 78 25 456, filed on September 5, 1978, the Applicant has described and claimed a pre-assembled monoblock branch connector which comprises, on the one hand, a body produced in the form of a clamp provided , at its upper part, means for perforating the insulation of a live cable, and, at its rear part, a projection provided with a housing receiving the derivative conductor, and, on the other hand, a gusset made in several parts pre-assembled in the factory on the connector, and enveloping part of the conductors.

Un tel conducteur pré-isolé apporte une grande sécurité d'emploi pour le monteur, étant donné que sa mise en place s'effectue par manipulation du gousset, le monteur n'ayant aucune raison de toucher aux parties métalliques du conducteur, celles-ci étant toutes protégées, à L'exception toutefois des vis de serrage, qui sont positionnées de manière que leurs extrémités sortent du gousset. Bien que les monteurs soient tenus d'utiliser des gants et un outillage isolé, pour la pose de tels connecteurs, il serait intéressant d'un parfaire la sécurité d'emploi. Such a pre-insulated conductor provides great job security for the fitter, since its installation is carried out by manipulation of the gusset, the fitter having no reason to touch the metallic parts of the conductor, these being all protected, with the exception, however, of the clamping screws, which are positioned so that their ends protrude from the gusset. Although the assemblers are required to use gloves and insulated tools, for the installation of such connectors, it would be interesting to improve job security.

C'est ce que se propose la présente invention, en rendant l'extrémité des vis non conductrice. This is what the present invention proposes, by making the end of the screws non-conductive.

L'invention a donc pour objet une vis isolée, notamment pour connecteur électrique sous tension, caractérisée en ce qu'elle comprend : un corps fileté comportant une tête creuse ; une masse isolante logée dans ladite tette creuse, et un tube métallique délimitant des pans creux, dont une extrémité est noyée dans ladite masse isolante, ce tube recevant la clé de serrage de la vis. The subject of the invention is therefore an insulated screw, in particular for a live electrical connector, characterized in that it comprises: a threaded body comprising a hollow head; an insulating mass housed in said hollow plate, and a metal tube delimiting hollow sides, one end of which is embedded in said insulating mass, this tube receiving the tightening key of the screw.

La vis isolée selon cette invention peut etre conçue de façon h constituer un limiteur de couple automatique, du type décrit, par exemple, dans le brevet français n 80 21 192, déposé le 3 octobre 1980 par la Demanderesse. Dans cette variante, la vis isolée objet de cette invention est caractérisée en ce qu'elle comporte, comme connu, une gorge usinée avec précision dans ledit tube métaiiique, afin da permettre la rupture de la partie extérieure de ce tube lors du serrage selon un couple choisi, l'alésage dudit tube étant muni d'un bossage formant butée, limitant la pénétration de la clé lors du serrage. The insulated screw according to this invention can be designed so as to constitute an automatic torque limiter, of the type described, for example, in French patent n 80 21 192, filed on October 3, 1980 by the Applicant. In this variant, the insulated screw object of this invention is characterized in that it comprises, as known, a groove machined with precision in said metallic tube, in order to allow the rupture of the external part of this tube during tightening according to a selected torque, the bore of said tube being provided with a boss forming a stop, limiting the penetration of the key during tightening.

D'autres caractéristiques et avantages de cette invention ressortiront de la description faite ci-après, en référence au dessin annexé, qui en illustre deux exemples de réalisation dépourvus de caractère limitatif. Sur le dessin
- la Figure 1 est une vue en élévation et coupe verticale d'une vis selon un premier exemple de réalisation de l'invention
- la Figure 2 est une vue similaire à la Figure 1, illustrant un second exemple de réalisation d'une vis selon l'invention;
- la Figure 3 est une coupe selon 3-3 de la Figure 2
- la Figure 4 est une vue en élévation de la vis isolée représentée à la Figure 2 ; et,
- la Figure 5 représente un connecteur de dérivation pré-isolé, notamment pour lignes électriques sous tension, mettant en oeuvre une vis isolée selon cette invention.Other characteristics and advantages of this invention will emerge from the description given below, with reference to the appended drawing, which illustrates two embodiments thereof which are not limiting in nature. On the drawing
- Figure 1 is an elevational view in vertical section of a screw according to a first embodiment of the invention
- Figure 2 is a view similar to Figure 1, illustrating a second embodiment of a screw according to the invention;
- Figure 3 is a section on 3-3 of Figure 2
- Figure 4 is an elevational view of the insulated screw shown in Figure 2; and,
- Figure 5 shows a pre-insulated branch connector, especially for live power lines, using an insulated screw according to this invention.

En se référant à la Figure 1, on voit que la vis isolée , selon un premier mode de réalisation de cette invention, comprend une partie filetée 10 munie d'une tete 12, comportant un alésage 14. Dans cet alésage 14 est logé un corps 16 constitué d'une masse d'un matériau isolant, par exemple une matière plastique. Dans un alésage central prévu au centre de la masse isolante 16 est positionné un tube métallique hexagonal à six pans creux 18. Referring to Figure 1, it can be seen that the insulated screw, according to a first embodiment of this invention, comprises a threaded part 10 provided with a head 12, comprising a bore 14. In this bore 14 is housed a body 16 consisting of a mass of an insulating material, for example a plastic material. In a central bore provided in the center of the insulating mass 16 is positioned a hexagonal metal tube with a hexagon socket 18.

Comme on peut le voir sur la Figure 1, ce tube 18 est destiné à recevoir la clé de serrage 20.As can be seen in FIG. 1, this tube 18 is intended to receive the tightening key 20.

Lorsque la vis ainsi décrite est mise en oeuvre dans un connecteur électrique, par exemple un connecteur pré-isolé du type décrit dans le brevet n" 7825456 mentionné plus haut, la clé 20, manipulée par le monteur, ne vient pas au contact des parties sous tension du connecteur Sur la Figure 5, on a représenté un tel connecteur 28, avec sa vis isolée 30. On voit que, dans un tel connecteur, toutes les parties métalliques sont isolées, y compris les extrémités de vis 30 sortant du gousset 26. When the screw thus described is implemented in an electrical connector, for example a pre-insulated connector of the type described in the patent no. 7825456 mentioned above, the key 20, manipulated by the fitter, does not come into contact with the parts under tension of the connector In FIG. 5, there is shown such a connector 28, with its insulated screw 30. It can be seen that, in such a connector, all the metal parts are insulated, including the ends of the screws 30 coming out of the gusset 26 .

Les Figures 2 à 4 illustrent une variante de la vis isolée décrite cidessus, conçue de façon à obtenir une rupture d'une partie de la vis à la valeur du couple de serrage choisie. A ce effet, le tube métallique hexago nal 18' comporte une gorge 22 usinée avec précision, définissant une zone de rupture du couple choisi. Figures 2 to 4 illustrate a variant of the insulated screw described above, designed so as to obtain a rupture of part of the screw at the value of the chosen tightening torque. To this end, the hexagonal metal tube 18 ′ has a groove 22 machined with precision, defining a zone of rupture of the chosen torque.

Pour limiter la pénétration de la clé de serrage 20 pour la rupture et conserver dégagée la partie des pans de ce tube 18', après rupture et séparation de la partie supérieure, on prévoit, dans l'alésage du tube 18', un bossage 24. Ainsi qu'on le voit sur la Figure 2, ce bossage 24 forme butée pour l'extrémité de la clé 20, limitant ainsi la pénétration de cette dernière lors du serrage de la vis. Après rupture de la vis selon la gorge 22, la partie inférieure 32 du tube 18' qui reste en place dans la masse isolante 16 est suffisante pour dégager une hauteur des pans de ce tube permettant d'effectuer ultérieurement un desserrage éventuel. To limit the penetration of the tightening key 20 for breaking and to keep the part of the sides of this tube 18 'free, after rupture and separation of the upper part, a boss 24 is provided in the bore of the tube 18' As seen in Figure 2, this boss 24 forms a stop for the end of the key 20, thus limiting the penetration of the latter when tightening the screw. After rupture of the screw along the groove 22, the lower part 32 of the tube 18 'which remains in place in the insulating mass 16 is sufficient to release a height of the sides of this tube allowing subsequent loosening.

Cette variante de la vis isolée selon l'invention peut également s'appliquer au connecteur de dérivation pré-isolé représenté sur la Figure 5, cette vis procurant alors les mêmes avantages que ceux décrits dans le brevet français n" 80 21 192 cité plus haut. This variant of the insulated screw according to the invention can also be applied to the pre-insulated branch connector shown in Figure 5, this screw then providing the same advantages as those described in French patent n ° 80 21 192 cited above. .

I1 demeure bien entendu que cette invention n'est pas limitée aux exemples de réalisation décrits et représentés, mais qu'elle en englobe toutes les variantes.  I1 remains of course that this invention is not limited to the embodiments described and shown, but that it encompasses all variants.

Claims (4)

REVENDICATIONS 1 - Vis isolée caractérisée en ce qu'elle comprend un corps fileté (10) comportant une tête creuse (12) ; une masse isolante (16) logée dans ladite tête creuse, et un tube métallique (18) délimitant des pans creux, dont une extrémité est noyée dans ladite masse isolante, ce tube recevant la clé de serrage (20). 1 - Insulated screw characterized in that it comprises a threaded body (10) comprising a hollow head (12); an insulating mass (16) housed in said hollow head, and a metal tube (18) delimiting hollow sides, one end of which is embedded in said insulating mass, this tube receiving the tightening key (20). 2 - Vis isolée selon la revendication 1, caractérisée en ce que ladite masse isolante est constituée d'une matière plastique. 2 - Insulated screw according to claim 1, characterized in that said insulating mass consists of a plastic material. 3 - Vis isolée selon l'une des revendications 1 ou 2, caractérisée en ce qu'elle comporte une gorge (22) usinée avec précision dans ledit tube métallique, afin de permettre la rupture de la partie extérieure dudit tube lors du serrage selon un couple choisi, et en ce que l'alésage dudit tube est muni d'un bossage (24) formant butée, pour limiter la pénétration de la clé lors du serrage. 3 - Insulated screw according to one of claims 1 or 2, characterized in that it comprises a groove (22) machined with precision in said metal tube, in order to allow the rupture of the external part of said tube during tightening according to a selected torque, and in that the bore of said tube is provided with a boss (24) forming a stop, to limit the penetration of the key during tightening. 4 - Vis isolée selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est appliquée au serrage d'un connecteur de dérivation pré-isolé pour lignes électriques sous tension, toutes les parties métalliques de ce connecteur étant ainsi protégées.  4 - Insulated screw according to any one of the preceding claims, characterized in that it is applied to the tightening of a pre-insulated branch connector for live electrical lines, all the metal parts of this connector being thus protected.
FR8107341A 1981-04-13 1981-04-13 Insulated tightening bolt for screw-fastening cable connectors - has shaft head with inserted hexagonal insulating plug preventing electrical contact with cable, and tightenable with allen key Withdrawn FR2503807A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8107341A FR2503807A1 (en) 1981-04-13 1981-04-13 Insulated tightening bolt for screw-fastening cable connectors - has shaft head with inserted hexagonal insulating plug preventing electrical contact with cable, and tightenable with allen key

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8107341A FR2503807A1 (en) 1981-04-13 1981-04-13 Insulated tightening bolt for screw-fastening cable connectors - has shaft head with inserted hexagonal insulating plug preventing electrical contact with cable, and tightenable with allen key

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FR2503807A1 true FR2503807A1 (en) 1982-10-15

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2607881A2 (en) * 1986-01-27 1988-06-10 Verlant Et Beaurain Screw with an insulated head particularly for electrical applications
FR2757688A1 (en) * 1996-12-20 1998-06-26 Mecelec Ind Cable/rail connector for industrial electricity distribution
EP0863572A2 (en) * 1997-03-07 1998-09-09 Ensto Sekko Oy Terminal or jointing clamp for a coated overhead cable and moment screw used therein
DE4113242C2 (en) * 1991-04-23 2003-12-24 Arcus Elektrotech shearbolt
US7915530B2 (en) 2008-04-01 2011-03-29 Thomas & Betts Corporation Torque limiting device for insulated plug
EP2871720A1 (en) * 2013-11-08 2015-05-13 Tyco Electronics Simel S.A.S. Preformed Plate for an Insulation-Piercing Connector
EP3222860A1 (en) * 2016-03-22 2017-09-27 Arcus Elektrotechnik Alois Schiffmann GmbH Shear screw for working under voltage
US11193522B2 (en) 2016-11-30 2021-12-07 3M Innovative Properties Company Shear bolt

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2164017A (en) * 1936-05-19 1939-06-27 Railroad Accessories Corp Insulated binding nut
GB665544A (en) * 1947-12-15 1952-01-23 Gordon Spencer Marston Improvements in or relating to insulated nuts
US3372361A (en) * 1965-06-15 1968-03-05 Fargo Mfg Co Inc Cable connector
FR2353968A1 (en) * 1976-06-04 1977-12-30 Wechsler Bernard Junction block for single conductor cables - has screw clamps gripping cables end to end in conducting block
FR2431063A1 (en) * 1978-07-11 1980-02-08 Telemecanique Electrique TORQUE LIMITER NUT
FR2457578A1 (en) * 1979-05-23 1980-12-19 Niled Sa INSULATION PERFORATION TYPE ELECTRICAL CONNECTION DEVICE

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2164017A (en) * 1936-05-19 1939-06-27 Railroad Accessories Corp Insulated binding nut
GB665544A (en) * 1947-12-15 1952-01-23 Gordon Spencer Marston Improvements in or relating to insulated nuts
US3372361A (en) * 1965-06-15 1968-03-05 Fargo Mfg Co Inc Cable connector
FR2353968A1 (en) * 1976-06-04 1977-12-30 Wechsler Bernard Junction block for single conductor cables - has screw clamps gripping cables end to end in conducting block
FR2431063A1 (en) * 1978-07-11 1980-02-08 Telemecanique Electrique TORQUE LIMITER NUT
FR2457578A1 (en) * 1979-05-23 1980-12-19 Niled Sa INSULATION PERFORATION TYPE ELECTRICAL CONNECTION DEVICE

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2607881A2 (en) * 1986-01-27 1988-06-10 Verlant Et Beaurain Screw with an insulated head particularly for electrical applications
DE4113242C2 (en) * 1991-04-23 2003-12-24 Arcus Elektrotech shearbolt
FR2757688A1 (en) * 1996-12-20 1998-06-26 Mecelec Ind Cable/rail connector for industrial electricity distribution
EP0863572A2 (en) * 1997-03-07 1998-09-09 Ensto Sekko Oy Terminal or jointing clamp for a coated overhead cable and moment screw used therein
EP0863572A3 (en) * 1997-03-07 2000-06-21 Ensto Sekko Oy Terminal or jointing clamp for a coated overhead cable and moment screw used therein
US7915530B2 (en) 2008-04-01 2011-03-29 Thomas & Betts Corporation Torque limiting device for insulated plug
EP2871720A1 (en) * 2013-11-08 2015-05-13 Tyco Electronics Simel S.A.S. Preformed Plate for an Insulation-Piercing Connector
EP3222860A1 (en) * 2016-03-22 2017-09-27 Arcus Elektrotechnik Alois Schiffmann GmbH Shear screw for working under voltage
DE102016105310B4 (en) * 2016-03-22 2020-09-24 Arcus Elektrotechnik Alois Schiffmann Gmbh SHEAR SCREW FOR WORKING UNDER VOLTAGE
US11193522B2 (en) 2016-11-30 2021-12-07 3M Innovative Properties Company Shear bolt

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