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EP0135439B1 - One quarter turn fixation device for a terminal cover of an electrical apparatus - Google Patents

One quarter turn fixation device for a terminal cover of an electrical apparatus Download PDF

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Publication number
EP0135439B1
EP0135439B1 EP84401755A EP84401755A EP0135439B1 EP 0135439 B1 EP0135439 B1 EP 0135439B1 EP 84401755 A EP84401755 A EP 84401755A EP 84401755 A EP84401755 A EP 84401755A EP 0135439 B1 EP0135439 B1 EP 0135439B1
Authority
EP
European Patent Office
Prior art keywords
lever
screw
terminal cover
groove
housing
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
EP84401755A
Other languages
German (de)
French (fr)
Other versions
EP0135439A1 (en
Inventor
William Bartolo
Noel Le Corre
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin 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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0135439A1 publication Critical patent/EP0135439A1/en
Application granted granted Critical
Publication of EP0135439B1 publication Critical patent/EP0135439B1/en
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
    • H01R13/44—Means for preventing access to live contacts
    • H01R13/447—Shutter or cover plate

Definitions

  • the invention relates to a quick fixing device according to the preamble of claim 1.
  • the lever carries a finger which is housed in the folded position in a recess in the cover to lock the lever. By tilting the lever, it is possible to unlock it by extracting the finger from the recess and turn it with the quarter-turn screw.
  • This multi-piece device is not inviolable and the lever can be detached from the screw by simple withdrawal of the hinge pin, which allows actuation of the screw using pliers.
  • the lever is locked by a fragile finger which is practically inaccessible for possible sealing.
  • the fixing screw generally has a hole for the passage of the sealing wire passing through a conjugate hole secured to the cover.
  • the installation of the sealing wire is difficult and the wire can be insufficiently stretched to avoid a partial rotation of the screw sometimes sufficient for the release of the terminal cover and disassembly.
  • Such a fixing is therefore not foolproof and it requires a screwdriver for the installation and removal of the terminal cover.
  • Another method of attachment makes use of simple screws requiring several rotational turns for attachment and therefore being tamper-proof.
  • the fixing operation is however long and also requires a screwdriver.
  • the present invention aims to allow the realization of a fast, simple and reliable fixing device and this object is achieved by the implementation of the features of claim 1.
  • the operating lever is foldable in a groove of the terminal cover, and in this folded position, it locks the screw in the position for fixing the terminal cover on the housing of the electrical appliance.
  • To release the terminal cover simply tilt the lever out of the groove and turn it to pivot the screw a quarter of a turn to the release position of the terminal cover.
  • the sealing wire retains the lever in its folded position inside the groove preventing any extraction of this lever and therefore any rotation of the screw.
  • the sealing hole is formed in the vicinity of the free end of the lever which performs a large tilting and rotation stroke for the release of the terminal cover.
  • a terminal cover 10 in the form of a cover capable of covering the terminals of an electrical appliance, in particular the terminals of an electric circuit breaker, comprises a fixing screw 12 capable of cooperating with a mating part 13 of the housing of the circuit breaker.
  • the screw 12 of the quarter-turn type is rotatably mounted in a housing 14 formed in the terminal cover 10, the head 16 of the screw 12 being embedded in a recess 18 on the face of the terminal cover.
  • the opposite end of the screw 12 carries a cleat 20 engaging in the conjugate part 13 to fix the terminal cover 10 to the housing. (see fig. 3).
  • a quarter turn rotation of the screw 12 releases the cleat 20 by breaking the connection between the terminal cover and the housing.
  • an operating lever 22 capable of struggling in a diametral plane of the screw 12 and of being folded back inside a groove 24 formed in the terminal cover 10.
  • the width of the groove 24 is slightly greater than the width of the lever 22 to prevent any rotation of the lever assembly 22, screw 12 in the inserted position of the lever in the groove 24.
  • the screw 12 is held in its housing 14 by a split nose 26 extending along the axis of the screw 12 and coming to be clipped in a conjugate orifice of the cover 10.
  • the screw 12, head 16, cleat 20, lever 22 and nose 26 assembly is constituted by a one-piece molded plastic part, the articulation of the lever 22 on the head 16 being produced by a thinned part 28.
  • the free end of the lever 22 has a tongue 30 with folded edges 32 covering a transverse partition 34 disposed in the groove 24.
  • the tongue 30 and the partition 34 are provided with holes 36, 38 which are aligned in. folded position of the lever 22 inside the groove 24.
  • a sealing wire (not shown) can pass through the holes 36, 38, so as to secure the tongue 30 to the partition 34 and prevent any lifting of the lever 22 in the direction extraction of the groove 24.
  • the end 32 facilitates gripping lever 22 sion for the lever output operation.
  • the elasticity of the articulation 28 urges the lever in the position inserted in the groove 24, the retention of the lever can also be reinforced by friction or clipping.
  • the installation of the sealing wire is simple despite the fact that no part of the screw 12 and of the lever 22 protrudes from the face of the terminal cover 10.
  • the fixing can of course be carried out by several screws 12 and the The invention is applicable to fasteners from parts other than terminal covers, in particular from covers or other panels of electrical apparatus.

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Description

L'invention est relative à un dispositif de fixation rapide selon le préambule de la revendication 1.The invention relates to a quick fixing device according to the preamble of claim 1.

Le document US-A-3 745 796 décrit un dispositif de fixation rapide d'un capot par une vis quart de tour ayant une tête sur laquelle est monté à pivotement un levier de manoeuvre.Document US-A-3,745,796 describes a device for quickly fixing a cover by a quarter-turn screw having a head on which is pivotally mounted an operating lever.

Le levier porte un doigt venant se loger en position rabattue dans un évidement du capot pour verrouiller le levier. En basculant le levier, il est possible de le déverrouiller par extraction du doigt de l'évidement et de le tourner avec la vis quart de tour. Ce dispositif en plusieurs pièces n'est pas inviolable et le levier peut être désolidarisé de la vis par simple retrait de l'axe d'articulation, ce qui permet un actionnement de la vis à l'aide d'une pince.The lever carries a finger which is housed in the folded position in a recess in the cover to lock the lever. By tilting the lever, it is possible to unlock it by extracting the finger from the recess and turn it with the quarter-turn screw. This multi-piece device is not inviolable and the lever can be detached from the screw by simple withdrawal of the hinge pin, which allows actuation of the screw using pliers.

Le verrouillage du levier est assuré par un doigt fragile pratiquement inaccessible pour un éventuel plombage.The lever is locked by a fragile finger which is practically inaccessible for possible sealing.

Un cache-borne doit éviter tout contact avec des pièces sous tension et doit permettre en plus un plombage évitant tout accès aux bornes et de ce fait toute fraude. A cet effet, la vis de fixation présente généralement un orifice de passage du fil de plombage passant par un orifice conjugué solidaire du cachebornes. Lorsque la tête de la vis est noyée dans le cache-bornes, la mise en place du fil de plombage est difficile et le fil peut être insuffisamment tendu pour éviter une rotation partielle de la vis parfois suffisante à la libération du cache-bornes et à son démontage. Une telle fixation n'est donc pas infraudable et elle nécessite un tournevis pour la mise en place et l'enlèvement du cache-bornes.A terminal cover must avoid contact with live parts and must also allow sealing to prevent access to the terminals and therefore fraud. To this end, the fixing screw generally has a hole for the passage of the sealing wire passing through a conjugate hole secured to the cover. When the head of the screw is buried in the terminal cover, the installation of the sealing wire is difficult and the wire can be insufficiently stretched to avoid a partial rotation of the screw sometimes sufficient for the release of the terminal cover and disassembly. Such a fixing is therefore not foolproof and it requires a screwdriver for the installation and removal of the terminal cover.

Un autre mode de fixation fait usage de simples vis nécessitant plusieurs tours de rotation pour la fixation et étant de ce fait infraudable. La manoeuvre de fixation est par contre longue et nécessite également un tournevis.Another method of attachment makes use of simple screws requiring several rotational turns for attachment and therefore being tamper-proof. The fixing operation is however long and also requires a screwdriver.

La présente invention a pour but de permettre la réalisation d'un dispositif de fixation rapide, simple et fiable et ce but est atteint par la mise en oeuvre des caractéristiques de la revendication 1.The present invention aims to allow the realization of a fast, simple and reliable fixing device and this object is achieved by the implementation of the features of claim 1.

Le levier de manoeuvre est repliable dans une rainure du cachebornes, et dans cette position repliée, il verrouille la vis dans la position de fixation du cache-bornes sur le boîtier de l'appareil électrique. Pour libérer le cache-bornes, il suffit de basculer le levier hors de la rainure et de le faire tourner pour pivoter la vis d'un quart de tour vers la position de libération du cache-bornes. Ces opérations sont particulièrement simples et rapides et ne nécessitent aucun outil de manoeuvre. Le levier et la vis sont en une seule pièce moulée en matière plastique, l'articulation du levier étant réalisée par une partie amincie de liaison entre la tête de la vis et le levier.The operating lever is foldable in a groove of the terminal cover, and in this folded position, it locks the screw in the position for fixing the terminal cover on the housing of the electrical appliance. To release the terminal cover, simply tilt the lever out of the groove and turn it to pivot the screw a quarter of a turn to the release position of the terminal cover. These operations are particularly simple and quick and do not require any operating tool. The lever and the screw are in a single piece molded in plastic, the articulation of the lever being produced by a thinned connecting part between the head of the screw and the lever.

Selon un développement de l'invention, le fil de plombage retient le levier dans sa position repliée à l'intérieur de la rainure empêchant toute extraction de ce levier et de ce fait toute rotation de la vis. L'orifice de plombage est ménagé au voisinage de l'extrémité libre du levier qui effectue une course importante de basculement et de rotation pour la libération du cache-bornes.According to a development of the invention, the sealing wire retains the lever in its folded position inside the groove preventing any extraction of this lever and therefore any rotation of the screw. The sealing hole is formed in the vicinity of the free end of the lever which performs a large tilting and rotation stroke for the release of the terminal cover.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de mise en oeuvre de l'invention, donné à titre d'exemple non limitatif et représenté au dessin annexé, dans lequel :

  • la figure 1 est une coupe partielle suivant la ligne I-I de la fig. 2, d'un cache-bornes équipé d'un dispositif de fixation selon l'invention, représenté en position de fixation ;
  • la figure 2 est une vue en plan de la fig. 1 ;
  • la figure 3 est une coupe suivant la ligne III-III de la fig. 1, montrant la vis de fixation engagé dans le logement correspondant du boîtier de l'appareil électrique ;
  • la figure 4 est une vue analogue à celle de la fig.. 3, montrant la vis de fixation en position dégagée.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and represented in the appended drawing, in which:
  • Figure 1 is a partial section along line II of FIG. 2, a terminal cover fitted with a fixing device according to the invention, shown in the fixing position;
  • FIG. 2 is a plan view of FIG. 1;
  • Figure 3 is a section along line III-III of FIG. 1, showing the fixing screw engaged in the corresponding housing of the housing of the electrical appliance;
  • Figure 4 is a view similar to that of Fig .. 3, showing the fixing screw in the released position.

Sur les figures, un cache-bornes 10 en forme de capot susceptible de coiffer les bornes d'un appareil électrique, notamment les bornes d'un disjoncteur électrique, comporte une vis 12 de fixation susceptible de coopérer avec une partie conjuguée 13 du boîtier du disjoncteur. La vis 12 du type à quart de tour est montée à rotation dans un logement 14 ménagé dans le cache-bornes 10, la tête 16 de la vis 12 étant noyée dans un creux 18 de la face du cache-bornes. L'extrémité opposée de la vis 12 porte un taquet 20 s'engageant dans la partie conjuguée 13 pour fixer le cache- bornes 10 au boîtier. (voir fig. 3). Une rotation d'un quart de tour de la vis 12 dégage le taquet 20 en brisant la liaison entre le cache-bornes et le boîtier. A la tête 16 est articulé un levier de manoeuvre 22 susceptible de se débattre dans un plan diamétral de la vis 12 et de se replier à l'intérieur d'une rainure 24 ménagée dans le cache-bornes 10. La largeur de la rainure 24 est légèrement supérieure à la largeur du levier 22 pour empêcher toute rotation de l'ensemble levier 22, vis 12 en position insérée du levier dans la rainure 24. La vis 12 est maintenue dans son logement 14 par un nez fendu 26 s'étendant suivant l'axe de la vis 12 et venant se clipser dans un orifice conjugué du cachebornes 10. L'ensemble vis 12, tête 16, taquet 20, levier 22 et nez 26 est constitué par une pièce monobloc moulée en matière plastique, l'articulation du levier 22 sur la tête 16 étant réalisée par une partie amincie 28. L'extrémité libre du levier 22 présente une languette 30 à bords repliés 32 venant coiffer une cloison transversale 34 disposée dans la rainure 24. La languette 30 et la cloison 34 sont pourvues d'orifices 36, 38 qui sont alignés en position repliée du levier 22 à l'intérieur de la rainure 24. Un fil de plombage (non représenté) peut traverser les orifices 36, 38, de façon à solidariser la languette 30 à la cloison 34 et empêcher tout soulèvement du levier 22 en direction d'extraction de la rainure 24. L'extrémité 32 facilite la préhension du levier 22 pour l'opération de sortie du levier. L'élasticité de l'articulation 28 sollicite le levier en position insérée dans la rainure 24, le maintien du levier pouvant de plus être renforcé par frottement ou clipsage.In the figures, a terminal cover 10 in the form of a cover capable of covering the terminals of an electrical appliance, in particular the terminals of an electric circuit breaker, comprises a fixing screw 12 capable of cooperating with a mating part 13 of the housing of the circuit breaker. The screw 12 of the quarter-turn type is rotatably mounted in a housing 14 formed in the terminal cover 10, the head 16 of the screw 12 being embedded in a recess 18 on the face of the terminal cover. The opposite end of the screw 12 carries a cleat 20 engaging in the conjugate part 13 to fix the terminal cover 10 to the housing. (see fig. 3). A quarter turn rotation of the screw 12 releases the cleat 20 by breaking the connection between the terminal cover and the housing. At the head 16 is articulated an operating lever 22 capable of struggling in a diametral plane of the screw 12 and of being folded back inside a groove 24 formed in the terminal cover 10. The width of the groove 24 is slightly greater than the width of the lever 22 to prevent any rotation of the lever assembly 22, screw 12 in the inserted position of the lever in the groove 24. The screw 12 is held in its housing 14 by a split nose 26 extending along the axis of the screw 12 and coming to be clipped in a conjugate orifice of the cover 10. The screw 12, head 16, cleat 20, lever 22 and nose 26 assembly is constituted by a one-piece molded plastic part, the articulation of the lever 22 on the head 16 being produced by a thinned part 28. The free end of the lever 22 has a tongue 30 with folded edges 32 covering a transverse partition 34 disposed in the groove 24. The tongue 30 and the partition 34 are provided with holes 36, 38 which are aligned in. folded position of the lever 22 inside the groove 24. A sealing wire (not shown) can pass through the holes 36, 38, so as to secure the tongue 30 to the partition 34 and prevent any lifting of the lever 22 in the direction extraction of the groove 24. The end 32 facilitates gripping lever 22 sion for the lever output operation. The elasticity of the articulation 28 urges the lever in the position inserted in the groove 24, the retention of the lever can also be reinforced by friction or clipping.

Le dispositif de fixation selon l'invention fonctionne de la manière suivante :

  • Dans la position de fixation, représentée à la figure 1, la vis 12 solidarise le cache-bornes 10 au boîtier 13 du disjoncteur, le taquet 20 étant engagé dans la partie conjuguée du boîtier du disjoncteur. Le levier 22 est inséré dans la rainure 24 et immobilise en rotation la vis 12. Le levier 22 peut être plombé dans cette position par simple introduction d'un fil de plombage dans les orifices 36,38. Pour enlever le cache-bornes 10 il suffit de rompre le fil de plombage et d'extraire le levier 22 de la rainure 24 par simple basculement de la manière indiquée par la flèche et en traits pointillés sur la figure 1. Dès que le levier 22 est extrait de la rainure 24 il est possible de le faire tourner en entraînant la vis 12 en rotation d'un quart de tour faisant sortir le taquet 20 et libérant le cachebornes 10 du boîtier 13. Cette opération ne nécessite aucun outil et est extrêmement rapide. La mise en place du cache-bornes 10 s'opère par une opération inverse de mise en place du cache- bornes 10 et de rotation de la vis 12 pour engager le taquet 20. Par la suite il suffit d'insérer le levier 22 dans la rainure 24 pour verrouiller la vis 12 de la manière précitée.
The fixing device according to the invention operates as follows:
  • In the fixing position, shown in Figure 1, the screw 12 secures the terminal cover 10 to the housing 13 of the circuit breaker, the cleat 20 being engaged in the conjugate part of the housing of the circuit breaker. The lever 22 is inserted into the groove 24 and immobilizes the screw 12 in rotation. The lever 22 can be sealed in this position by simple introduction of a sealing wire into the orifices 36, 38. To remove the terminal cover 10, it suffices to break the sealing wire and extract the lever 22 from the groove 24 by simple tilting as indicated by the arrow and in dotted lines in FIG. 1. As soon as the lever 22 is extracted from the groove 24 it is possible to rotate it by driving the screw 12 in rotation by a quarter turn bringing out the cleat 20 and releasing the cover 10 of the housing 13. This operation requires no tools and is extremely fast . The establishment of the terminal cover 10 is effected by a reverse operation of the establishment of the terminal cover 10 and rotation of the screw 12 to engage the cleat 20. Thereafter, it suffices to insert the lever 22 into the groove 24 for locking the screw 12 in the aforementioned manner.

La mise en place du fil de plombage est simple malgré qu'aucune partie de la vis 12 et du levier 22 ne vienne en saillie de la face du cache-bornes 10. La fixation peut bien entendu être réalisée par plusieurs vis 12 et l'invention est applicable à des fixations d'autres parties que des cache-bornes, en particulier de couvercles ou autres panneaux d'appareils électriques.The installation of the sealing wire is simple despite the fact that no part of the screw 12 and of the lever 22 protrudes from the face of the terminal cover 10. The fixing can of course be carried out by several screws 12 and the The invention is applicable to fasteners from parts other than terminal covers, in particular from covers or other panels of electrical apparatus.

Claims (4)

1. Device of fast fixing for a terminal cover (10) of a casing of an electric apparatus, comprising a fixing screw (12) mounted in rotation by turn fraction on the terminal cover and carrying an operation head (16) at one of its ends and at the opposite end a block (20) likely to fit into fixing position in an interlock conjugated housing (13) arranged in said casing, said head (16) carrying radially on one of the sides in operation lever (22) mounted in tipping on said screw head to occupy a lowered locked position of the lever or a raised position to permit a limited rotation of the lever and of the associated screw in order to set free the block (20) out of its housing and to disconnect the terminal cover (10) from the casing, characterized in that the screw (12), the block (20) and the lever (22) are made by a part moulded in plastic, the lever (22) being fastened to the screw head (16) by a slim part forming a tipping hinge (28), and that a groove (24) for housing said lever (22) is arranged in said terminal cover (10) to receive in insertion with small clearance the lever (22) and to lock the lever and the screw (12) in fixing position.
2. Fast fixing device according to claim 1, characterized in that said groove (24) for housing the lever (22) fits together to -a hole (18) of the terminal cover (10) in which the screw (12) head (16) is lost, said lever coming and folding up and vanishing into the groove in locked position.
3. Fast fixing device according to claims 1 or 2, characterized in that the free end of the lever shows an aperture (36) for the passage of a leading wire holding the lever (22) in folded position inside the groove (24).
4. Fast fixing device according to claim 3, characterized in that said aperture (36) is arranged on a spline (30) extending perpendicular to said lever (22) and cooperates with a conjugated aperture (38) accommodated on a cross- partition (34) of said groove (24).
EP84401755A 1983-09-14 1984-09-04 One quarter turn fixation device for a terminal cover of an electrical apparatus Expired EP0135439B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8314738A FR2551924B1 (en) 1983-09-14 1983-09-14 DEVICE FOR FIXING A QUICK-TURN OF A TERMINAL COVER OF AN ELECTRICAL APPARATUS
FR8314738 1983-09-14

Publications (2)

Publication Number Publication Date
EP0135439A1 EP0135439A1 (en) 1985-03-27
EP0135439B1 true EP0135439B1 (en) 1987-12-23

Family

ID=9292272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401755A Expired EP0135439B1 (en) 1983-09-14 1984-09-04 One quarter turn fixation device for a terminal cover of an electrical apparatus

Country Status (6)

Country Link
EP (1) EP0135439B1 (en)
DE (1) DE3468295D1 (en)
ES (1) ES290317Y (en)
FR (1) FR2551924B1 (en)
PT (1) PT79188B (en)
ZA (1) ZA847162B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9842712B2 (en) 2015-03-06 2017-12-12 General Electric Company Switching device having terminal cover, and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9013158U1 (en) * 1990-09-12 1990-11-22 Fritz Kuke Kg, 1000 Berlin Locking device for a telecommunications connection unit (TAE)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1062304B (en) * 1958-02-05 1959-07-30 Westfaelische Metall Ind G M B Electric socket, especially for motor vehicles and aircraft
DE1690430A1 (en) * 1967-08-10 1971-06-03 Vedder Gmbh Geb Socket, in particular an earthed socket with a hinged cover and a rectangular or square frame
DE2653440C3 (en) * 1976-11-24 1980-02-07 Erich 8000 Muenchen Ettinger Apparatus clamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9842712B2 (en) 2015-03-06 2017-12-12 General Electric Company Switching device having terminal cover, and method

Also Published As

Publication number Publication date
ES290317U (en) 1986-03-16
FR2551924A1 (en) 1985-03-15
DE3468295D1 (en) 1988-02-04
PT79188B (en) 1986-07-17
PT79188A (en) 1984-10-01
EP0135439A1 (en) 1985-03-27
FR2551924B1 (en) 1985-10-11
ES290317Y (en) 1986-10-16
ZA847162B (en) 1985-04-24

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