EP0778595B1 - Safety switch with key - Google Patents

Safety switch with key Download PDF

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Publication number
EP0778595B1
EP0778595B1 EP96402610A EP96402610A EP0778595B1 EP 0778595 B1 EP0778595 B1 EP 0778595B1 EP 96402610 A EP96402610 A EP 96402610A EP 96402610 A EP96402610 A EP 96402610A EP 0778595 B1 EP0778595 B1 EP 0778595B1
Authority
EP
European Patent Office
Prior art keywords
roller
control
unlocking
key
rollers
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 - Lifetime
Application number
EP96402610A
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German (de)
French (fr)
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EP0778595A1 (en
Inventor
Hugues Da Dalt
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.)
Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication date
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Publication of EP0778595A1 publication Critical patent/EP0778595A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/08—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/002—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/002—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards
    • H01H2027/005—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards the key receiving part having multiple openings to allow keys from different directions to operate the switch

Definitions

  • the present invention relates to an electric key safety switch comprising a housing surmounted by a control head and housing organs of electrical contact, the control head comprising a control roller likely to act on the contact members, as well as an unlocking part associated with the control roller to unlock it, the unlocking part and the control roller being controlled by the key when it is inserted into the head.
  • Safety switches of this type are well known (see par example documents DE-33 02631 and EP-507 842).
  • the roller is likely to rotate around an axis to control the contact members via a pusher and the control head has at least one slot for the key in a general direction perpendicular to the axis of rotation of the roller.
  • the object of the invention is therefore to give the switch a high degree inviolability and reliability, by means of a mechanism authorizing the introduction of the control key in a direction orthogonal to the axis of the roller control or in two directions orthogonal to each other and to the axis of rotation of the pebble.
  • a control roller lock is housed in the head and is acted upon elastically to engage in a notch of the control roller and the part release is applicable by means of a cam surface against the latch for the release notch when inserting the key. It should be noted that blocking the control roller in safety or rest position is due to the lock and that the release of the control roller is effected by the action of the release piece on the lock, so indirectly.
  • the release piece is a rotary roller adjacent to the roller control, coaxial with it and having on its periphery at least one notch for receiving the key, the shapes of the notches on the control roller and of the release roller and the control key being such that the key operates in start of introduction of the release roller before the control roller.
  • the notch of the release roller then extends for example over a greater angle than the roller ordered.
  • two release rollers can be provided arranged symmetrically with respect to a central control roller, the latter being connected to the pusher by means of a link hinged to the central roller of and push button.
  • two rollers are provided. release arranged symmetrically with respect to a central control roller, the latter being connected by a pin connection and control groove to the butt of a slide with a tail constituting the pusher, the guide of the slide being made at the same time by its tail in an orifice of the control head or of the housing and by cooperation of a guide groove of its stock with the shaft or the axis of rotation of the control roller.
  • the control roller can advantageously be consisting of two rollers, each paired on the outside with a roller release and coupled together on the inside by the axis of the link or slide.
  • the stock in an embodiment with two twin control rollers, can be placed in a central position and, in an embodiment with a single central roller, control, the stock can be a fork having arms provided with grooves and guide grooves, these arms laterally enveloping the release rollers.
  • the safety switch illustrated in FIG. 1 comprises on the one hand a box 10 elongated in a direction Z and comprising a block of electrical contacts 11 and secondly a control head 12 of square shape, fixed on the housing 10 of so that the user can choose four different positions offset by pivoting 90 ° around an axis Z1 of direction Z.
  • the head 12 is assembled to the housing by any known means allowing pivoting to the desired position and maintaining in this position.
  • the control head 12 has in one of its lateral faces 13 a slot 14 and in its upper face 15 opposite the block 11 an identical slot 16; the slots 14 and 16 are dimensioned to allow passage through one or more the other of a flat control key 17 movable respectively according to a direction Y or Z depending on the movement of a support of this key (not represented).
  • the key 17 is for example rigidly or oscillatingly linked to a door envelope for electrical or machine equipment to ensure correlation between closing this door and authorizing the operation of the equipment or the machine given by the contact block.
  • the control key 17 has a shape particular to ash the safety switch as far as possible.
  • She has a known transverse control strip 18, perpendicular to its direction of movement, to cooperate with a roller control 20 rotatably mounted in the head 12 by means of a shaft 21 of axis X perpendicular to the Y and Z directions and resting in bearings of the head.
  • the key further comprises two lateral ears 19a, 19b situated level with the bar 18 and slightly advanced therefrom to cooperate with two rollers 30a, 30b for indirect release of the control roller.
  • the release rollers 30 are thin and are housed in the control head on each side of the control roller 20, while being mounted on the same rotation shaft 21 of axis X.
  • the rollers 20, 30 have a general shape particular and similar, forming part of the same circular outline, but presenting however differences. They cooperate with a pair of respective locks 40a, 40b, mounted sliding in direction Z in housings 40c provided in the cylindrical bottom wall of the control head 12, on either side of an orifice 41 provided for the passage of a link 42 articulated on the one hand on an axis 22 of the roller control 20, on the other hand on an axis 43 of a pusher 44 guided in the part cylindrical lower part of the orifice 41 and provided for actuating the contact block 11.
  • the axis 22 is housed in a central recess 23 of the roller 20 sufficient to allow the functional travel of the link (see Figure 3). It should also be noted that the rod 42 is oriented at rest in a direction close to the axis Z1.
  • the control roller 20 has on its periphery two notches 24, 25 of identical shape.
  • the notch 24 includes a front edge 24a on which applies the front of the bar 18 of the key 17 pushed into the slot 14 according to the direction Y and a rear edge 24b to which the rear of the bar 18 is applied when you remove the key.
  • a locking notch 26 is provided on the periphery of the roller; the shape of the notch allows the latches 40a, 40b to engage therein under the effect of their return springs 45.
  • Another notch 27 is provided on the periphery of the roller for the application of a pin portion 46a of a return spring 46 common to the rollers.
  • a stopper can be located on the periphery of the roller to stop it against a shoulder A7 of the control head and thus confirm the locking position.
  • the release rollers 30 each comprise two notches 31, 32, identical in shape.
  • the notch 31 has a front edge 31a located at rest at level of the front edge 24a of the notch 24 of the roller 20; on this front 31a can apply an ear 19 of the key 17.
  • the notch 31 also has a rear edge 31b located at rest below the rear front 24b of the notch 24 (see Figure 2).
  • Has a notch 33 of each roller 30 is associated with a cam surface 33a which cooperates with a lock 40 so that it retracts as soon as the roller 30 rotates in the opposite direction timetable ( Figures 2 to 4); a notch 34 is located on the periphery of the rollers 30 at the level of the notch 27 of the roller 20, but extending over a smaller sector, to accommodate the part in pin 46a of spring 46.
  • the switch safety includes two control rollers 20a, 20b, and two release rollers 30a, 30b coupled externally to these.
  • the roller profiles are similar to those of the previous embodiment.
  • the connection of the control rollers 20a, 20b with the pusher is constituted by a slide 50 provided with a tail 51 which forms the pusher itself and a stick 52 having a light 53 in which penetrates a control shaft 54 coupling the two control rollers 20.
  • the light 53 can have any suitable shape; here it has a 53z groove L shape vertical, that is to say oriented in the direction Z, and with horizontal groove 53y, that is to say oriented in direction Y.
  • control groove 53y In the control groove 53y is engaged a control axis 54 coupling the rollers 20a, 20b so that the movement of the axis generated by the movement of the key 17 causes the displacement of the slide 50; in the guide groove 53z is engaged the shaft 21 on which the four rollers 20, 30, this forcing the slide 50 to move in translation in direction Z.
  • the shaft 21 is mounted in wall bearings 21a of the head control, these walls being sized to take up significant efforts exerted on the tree.
  • the return spring 46 of the rollers also recalls the slide 50 in high rest position. In either of the embodiments described, it is possible to also provide a specific return spring for the slide. Although two return springs 45 are associated with locks 40, it is also possible to provide for two locks a common return spring. Alternatively, the release rollers may have a slightly different diameter from that of the roller (s) ordered.
  • a return spring 56 is associated with each release roller 30; to facilitate understanding, the or the control rollers have not been shown.
  • Spring 56 is a spring of torsion mounted in a thin piece of support 60 itself nested or embedded over part of its thickness in a suitable opening 61 of the roller release to be integral in rotation; room 60 can of course be otherwise assembled with the release roller.
  • Exhibit 60 includes a body 62 profiled so as to fit into the profile of the notches 31, 32 of the roller 30 so as not to interfere with the operation of the key; the body 62 has housings 63.64 for the respective branches 57, 58 of the torsion spring 56; branch 57 applies against a fixed stop 59 of the control head 12.
  • the slide 50 houses, in a recess 51a of its tail 51 which forms the pusher associated with the contact block, the latches 40 and their return spring 45, the latches being guided by suitable conformations of the recess; the slide 50 presents in its part upper a fork-shaped stick 52 whose arms 52a, 52b envelop laterally the rollers 30.
  • Each arm comprises a vertical groove 53z of guide and a control groove 53f oriented along an axis F inclined with respect to to direction Y.
  • control head is illustrated in the rest position in FIG. 8, the control key 17, linked to the envelope or machine door, then being released of the switch and the contact block then being urged by the pusher 51.
  • the control key 17 is inserted into the slot 14 (or into the slot 16 depending on the assembly previously chosen).
  • the ears 19 of the key start by applying to the front edge 31a of the notches 31 and to cause the release rollers 30 to rotate clockwise against the force spring 46; the strip 18 is not yet applied against the front edge 24a of the notches 24 of the control rollers 20; the cam surfaces 33a of the notches 33 push the latches 40 back by compressing their return springs 45, then the strip 18 is applied against the fronts 24a (see FIG. 9) and the rollers 20 then unlocked also start to turn clockwise.
  • Key 17 continues to move forward and rotate all of the rollers 20.30 in concert; the rotation of control rollers 20 causes the rotation of the control shaft 54 which causes the lifting of the slide 50 guided by its push-tail 51 in the bore 41 and by the groove 53z against the shaft 21.
  • the pusher 51 is released from the control part 11a from the contact block 11 and releases the latter, the contacts of which switch for allow the implementation of the controlled system (see Figure 10).

Description

La présente invention concerne un interrupteur électrique de sécurité à clé comprenant un boítier surmonté d'une tête de commande et logeant des organes de contact électrique, la tête de commande comportant un galet de commande susceptible d'agir sur les organes de contact, ainsi qu'une pièce de déblocage associée au galet de commande pour débloquer celui-ci, la pièce de déblocage et le galet de commande étant commandés par la clé à l'introduction de celle-ci dans la tête.The present invention relates to an electric key safety switch comprising a housing surmounted by a control head and housing organs of electrical contact, the control head comprising a control roller likely to act on the contact members, as well as an unlocking part associated with the control roller to unlock it, the unlocking part and the control roller being controlled by the key when it is inserted into the head.

Les interrupteurs de sécurité de ce type sont bien connus (voir par exemple les documents DE-33 02631 et EP-507 842). Dans ces interrupteurs, le galet de commande est susceptible de tourner autour d'un axe pour commander les organes de contact via un poussoir et la tête de commande présente au moins une fente de passage pour la clé selon une direction générale perpendiculaire à l'axe de rotation du galet.Safety switches of this type are well known (see par example documents DE-33 02631 and EP-507 842). In these switches, the roller is likely to rotate around an axis to control the contact members via a pusher and the control head has at least one slot for the key in a general direction perpendicular to the axis of rotation of the roller.

Les mécanismes connus de déblocage du galet de commande se ne prêtent pas facilement à un actionnement selon l'une ou l'autre de deux directions perpendiculaires entre elles et à l'axe de rotation du galet de commande. Or une telle dualité d'introduction de la clé peut s'avérer très utile dans la mesure où elle autorise une plus grande souplesse de montage de l'interrupteur de sécurité.Known mechanisms for unlocking the control roller are not not easily lend to actuation in either of two directions perpendicular to each other and to the axis of rotation of the control roller. Now such key insertion duality can be very useful insofar as it allows greater flexibility in mounting the safety switch.

Il est d'autre part souhaitable d'accentuer l'inviolabilité des interrupteurs de sécurité en agençant de manière appropriée la clé, le galet de commande et sa pièce de déblocage.It is also desirable to accentuate the inviolability of the switches safety by appropriately arranging the key, the control roller and its part unlocking.

L'invention a ainsi pour but de conférer à l'interrupteur un haut degré d'inviolabilité et de fiabilité, et ce au moyen d'un mécanisme autorisant l'introduction de la clé de commande selon une direction orthogonale à l'axe du galet de commande ou selon deux directions orthogonales entre elles et à l'axe de rotation du galet.The object of the invention is therefore to give the switch a high degree inviolability and reliability, by means of a mechanism authorizing the introduction of the control key in a direction orthogonal to the axis of the roller control or in two directions orthogonal to each other and to the axis of rotation of the pebble.

Selon l'invention, dans un interrupteur de sécurité du type décrit précédemment, un verrou du galet de commande est logé dans la tête et est sollicité élastiquement pour s'engager dans un cran du galet de commande et la pièce de déblocage est applicable au moyen d'une surface de came contre le verrou pour le dégager du cran à l'introduction de la clé. Il convient d'observer que le blocage du galet de commande en position de sécurité ou de repos est dû au verrou et que le déblocage du galet de commande est effectué par l'action de la pièce de déblocage sur le verrou, donc de manière indirecte.According to the invention, in a safety switch of the type described previously, a control roller lock is housed in the head and is acted upon elastically to engage in a notch of the control roller and the part release is applicable by means of a cam surface against the latch for the release notch when inserting the key. It should be noted that blocking the control roller in safety or rest position is due to the lock and that the release of the control roller is effected by the action of the release piece on the lock, so indirectly.

De préférence, la pièce de déblocage est un galet rotatif adjacent au galet de commande, coaxial à celui-ci et présentant sur son pourtour au moins une encoche de réception de la clé, les formes des encoches du galet de commande et du galet de déblocage et la clé de commande étant telles que la clé actionne en début d'introduction le galet de déblocage avant le galet de commande. L'encoche du galet de déblocage s'étend alors par exemple sur un angle plus grand que le galet de commande. Pour répartir les efforts, on peut prévoir deux galets de déblocage disposés symétriquement par rapport à un galet central de commande, celui-ci étant relié au poussoir par l'intermédiaire d'une biellette articulée au galet central de commande et au poussoir.Preferably, the release piece is a rotary roller adjacent to the roller control, coaxial with it and having on its periphery at least one notch for receiving the key, the shapes of the notches on the control roller and of the release roller and the control key being such that the key operates in start of introduction of the release roller before the control roller. The notch of the release roller then extends for example over a greater angle than the roller ordered. To distribute the forces, two release rollers can be provided arranged symmetrically with respect to a central control roller, the latter being connected to the pusher by means of a link hinged to the central roller of and push button.

Dans un mode de réalisation préféré, on prévoit deux galets de déblocage disposés symétriquement par rapport à un galet central de commande, celui-ci étant relié par une liaison à pion et rainure de commande à la crosse d'un coulisseau doté d'une queue constituant le poussoir, le guidage du coulisseau étant réalisé à la fois par sa queue dans un orifice de la tête de commande ou du boítier et par coopération d'une rainure de guidage de sa crosse avec l'arbre ou l'axe de rotation du galet de commande. Le galet de commande peut avantageusement être constitué par deux galets jumelés chacun du côté extérieur avec un galet de déblocage et couplés entre eux du côté intérieur par l'axe de la biellette ou du coulisseau. Dans une réalisation à deux galets jumelés de commande, la crosse peut être disposée en position centrale et, dans une réalisation à un seul galet central de commande, la crosse peut être une fourche présentant des bras munis des rainures de commande et des rainures de guidage, ces bras enveloppant latéralement les galets de déblocage.In a preferred embodiment, two rollers are provided. release arranged symmetrically with respect to a central control roller, the latter being connected by a pin connection and control groove to the butt of a slide with a tail constituting the pusher, the guide of the slide being made at the same time by its tail in an orifice of the control head or of the housing and by cooperation of a guide groove of its stock with the shaft or the axis of rotation of the control roller. The control roller can advantageously be consisting of two rollers, each paired on the outside with a roller release and coupled together on the inside by the axis of the link or slide. In an embodiment with two twin control rollers, the stock can be placed in a central position and, in an embodiment with a single central roller, control, the stock can be a fork having arms provided with grooves and guide grooves, these arms laterally enveloping the release rollers.

La description qui va être faite à présent d'un exemple de réalisation en regard des dessins annexés permettra de comprendre la constitution et les caractéristiques de l'interrupteur de sécurité conforme à l'invention.

  • la figure 1 représente schématiquement en perspective l'interrupteur de sécurité.
  • les figures 2 et 3 montrent en élévation une tête de commande à biellette de l'interrupteur, respectivement en position de repos et en position de travail.
  • les figures 4 et 5 montrent un galet de déblocage et respectivement un galet de commande.
  • la figure 6 est une perspective éclatée d'une partie du mécanisme d'une tête de commande à coulisseau.
  • la figure 7 montre une partie du même mécanisme à l'état assemblé.
  • les figures 8 à 10 illustrent le fonctionnement et la tête de commande à coulisseau.
  • la figure 11 montre en élévation une vue schématique une variante de galet de déblocage.
  • la figure 12 est une vue en perspective du galet de la figure 11.
  • les figures 13 et 14 montrent respectivement en position inactive et active une variante à coulisseau muni d'une crosse en fourche.
The description which will now be given of an exemplary embodiment with regard to the appended drawings will make it possible to understand the constitution and the characteristics of the safety switch according to the invention.
  • Figure 1 shows schematically in perspective the safety switch.
  • Figures 2 and 3 show in elevation a control rod link switch, respectively in the rest position and in the working position.
  • Figures 4 and 5 show an unlocking roller and a control roller respectively.
  • Figure 6 is an exploded perspective view of part of the mechanism of a slide control head.
  • Figure 7 shows part of the same mechanism in the assembled state.
  • Figures 8 to 10 illustrate the operation and the slide control head.
  • Figure 11 shows in elevation a schematic view of a variant of the release roller.
  • FIG. 12 is a perspective view of the roller of FIG. 11.
  • Figures 13 and 14 show respectively in the inactive and active position a slide variant provided with a fork stock.

L'interrupteur de sécurité illustré sur la figure 1 comprend d'une part un boítier 10 allongé selon une direction Z et comprenant un bloc de contacts électriques 11 et d'autre part une tête de commande 12 de forme carrée, fixée sur le boítier 10 de manière à pouvoir prendre au choix de l'utilisateur quatre positions différentes décalées par pivotement de 90° autour d'un axe Z1 de direction Z. La tête 12 est assemblée au boítier par tous moyens connus permettant le pivotement jusqu'à la position souhaitée et le maintien dans cette position.The safety switch illustrated in FIG. 1 comprises on the one hand a box 10 elongated in a direction Z and comprising a block of electrical contacts 11 and secondly a control head 12 of square shape, fixed on the housing 10 of so that the user can choose four different positions offset by pivoting 90 ° around an axis Z1 of direction Z. The head 12 is assembled to the housing by any known means allowing pivoting to the desired position and maintaining in this position.

La tête de commande 12 présente dans l'une de ses faces latérales 13 une fente 14 et dans sa face supérieure 15 opposée au bloc 11 une fente identique 16; les fentes 14 et 16 sont dimensionnées pour permettre le passage dans l'une ou l'autre d'une clé plate de commande 17 déplaçable respectivement selon une direction Y ou Z en fonction du mouvement d'un support de cette clé (non représenté). La clé 17 est par exemple liée de manière rigide ou oscillante à une porte d'enveloppe pour matériel électrique ou de machine pour garantir une corrélation entre la fermeture de cette porte et l'autorisation du fonctionnement du matériel ou de la machine donnée par le bloc de contacts. La clé de commande 17 a une forme particulière pour cendre l'interrupteur de sécurité autant que possible infraudable. Elle présente de façon connue une barrette transversale de commande 18, perpendiculaire à son sens de déplacement, pour coopérer avec un galet de commande 20 monté rotatif dans la tête 12 au moyen d'un arbre 21 d'axe X perpendiculaire aux directions Y et Z et reposant dans des paliers de la tête. La clé comprend en outre deux oreilles latérales 19a, 19b situées de niveau avec la barrette 18 et en légère avancée par rapport à celle-ci pour coopérer avec deux galets 30a, 30b de déblocage indirect du galet de commande.The control head 12 has in one of its lateral faces 13 a slot 14 and in its upper face 15 opposite the block 11 an identical slot 16; the slots 14 and 16 are dimensioned to allow passage through one or more the other of a flat control key 17 movable respectively according to a direction Y or Z depending on the movement of a support of this key (not represented). The key 17 is for example rigidly or oscillatingly linked to a door envelope for electrical or machine equipment to ensure correlation between closing this door and authorizing the operation of the equipment or the machine given by the contact block. The control key 17 has a shape particular to ash the safety switch as far as possible. She has a known transverse control strip 18, perpendicular to its direction of movement, to cooperate with a roller control 20 rotatably mounted in the head 12 by means of a shaft 21 of axis X perpendicular to the Y and Z directions and resting in bearings of the head. The key further comprises two lateral ears 19a, 19b situated level with the bar 18 and slightly advanced therefrom to cooperate with two rollers 30a, 30b for indirect release of the control roller.

Les galets de déblocage 30 sont de faible épaisseur et sont logés dans la tête de commande de chaque côté du galet de commande 20, en étant montés sur le même arbre de rotation 21 d'axe X. Les galets 20, 30, ont une forme générale particulière et similaire, s'inscrivant dans un même contour circulaire, mais présentant cependant des différences. Ils coopèrent avec un couple de verrous respectifs 40a, 40b, montés coulissants selon la direction Z dans des logements 40c prévus dans la paroi inférieure cylindrique de la tête de commande 12, de part et d'autre d'un orifice 41 prévu pour le passage d'une biellette 42 articulée d'une part sur un axe 22 du galet de commande 20, d'autre part sur un axe 43 d'un poussoir 44 guidé dans la partie inférieure cylindrique de l'orifice 41 et prévu pour actionner le bloc de contacts 11. L'axe 22 est logé dans un évidement central 23 du galet 20 suffisant pour autoriser le débattement fonctionnel de la biellette (voir figure 3). On notera en outre que la biellette 42 est orientée au repos selon une direction voisine de l'axe Z1.The release rollers 30 are thin and are housed in the control head on each side of the control roller 20, while being mounted on the same rotation shaft 21 of axis X. The rollers 20, 30 have a general shape particular and similar, forming part of the same circular outline, but presenting however differences. They cooperate with a pair of respective locks 40a, 40b, mounted sliding in direction Z in housings 40c provided in the cylindrical bottom wall of the control head 12, on either side of an orifice 41 provided for the passage of a link 42 articulated on the one hand on an axis 22 of the roller control 20, on the other hand on an axis 43 of a pusher 44 guided in the part cylindrical lower part of the orifice 41 and provided for actuating the contact block 11. The axis 22 is housed in a central recess 23 of the roller 20 sufficient to allow the functional travel of the link (see Figure 3). It should also be noted that the rod 42 is oriented at rest in a direction close to the axis Z1.

Le galet de commande 20 présente sur son pourtour deux encoches 24, 25 de forme identique. Ainsi l'encoche 24 comprend un front avant 24a sur lequel s'applique l'avant de la barrette 18 de la clé 17 poussée dans la fente 14 selon la direction Y et un front arrière 24b sur lequel s'applique l'arrière de la barrette 18 quand on retire la clé. Un cran de verrouillage 26 est prévu sur le pourtour du galet ; la forme du cran permet aux verrous 40a, 40b de s'y engager sous l'effet de leurs ressorts de rappel 45. Un autre cran 27 est prévu sur le pourtour du galet pour l'application d'une partie en épingle 46a d'un ressort de rappel 46 commun aux galets. Une butée peut être située sur le pourtour du galet pour l'arrêter contre un épaulement A7 de la tête de commande et confirmer ainsi la position de verrouillage.The control roller 20 has on its periphery two notches 24, 25 of identical shape. Thus the notch 24 includes a front edge 24a on which applies the front of the bar 18 of the key 17 pushed into the slot 14 according to the direction Y and a rear edge 24b to which the rear of the bar 18 is applied when you remove the key. A locking notch 26 is provided on the periphery of the roller; the shape of the notch allows the latches 40a, 40b to engage therein under the effect of their return springs 45. Another notch 27 is provided on the periphery of the roller for the application of a pin portion 46a of a return spring 46 common to the rollers. A stopper can be located on the periphery of the roller to stop it against a shoulder A7 of the control head and thus confirm the locking position.

Les galets de déblocage 30 comprennent chacun deux encoches 31, 32, de forme identique. L'encoche 31 présente un front avant 31a situé au repos au niveau du front avant 24a de l'encoche 24 du galet 20 ; sur ce front 31a peut s'appliquer une oreille 19 de la clé 17. L'encoche 31 présente en outre un front arrière 31b situé au repos en-deçà du front arrière 24b de l'encoche 24 (voir figure 2). A un cran 33 de chaque galet 30 est associée une surface de came 33a qui coopère avec un verrou 40 pour que celui-ci se rétracte dès la mise en rotation du galet 30 en sens horaire (figures 2 à 4) ; un cran 34 est situé sur le pourtour des galets 30 au niveau du cran 27 du galet 20, mais s'étendant sur un secteur plus petit, pour loger la partie en épingle 46a du ressort 46.The release rollers 30 each comprise two notches 31, 32, identical in shape. The notch 31 has a front edge 31a located at rest at level of the front edge 24a of the notch 24 of the roller 20; on this front 31a can apply an ear 19 of the key 17. The notch 31 also has a rear edge 31b located at rest below the rear front 24b of the notch 24 (see Figure 2). Has a notch 33 of each roller 30 is associated with a cam surface 33a which cooperates with a lock 40 so that it retracts as soon as the roller 30 rotates in the opposite direction timetable (Figures 2 to 4); a notch 34 is located on the periphery of the rollers 30 at the level of the notch 27 of the roller 20, but extending over a smaller sector, to accommodate the part in pin 46a of spring 46.

Dans le mode de réalisation illustré sur les figures 6 à 10, l'interrupteur de sécurité comprend deux galets de commande 20a, 20b, et deux galets de déblocage 30a, 30b jumelés extérieurement à ceux-ci. Les profils des galets sont similaires à ceux du mode de réalisation précédent. La liaison des galets de commande 20a, 20b avec le poussoir est constituée par un coulisseau 50 doté d'une queue 51 qui forme le poussoir lui-même et d'une crosse 52 présentant une lumière 53 dans laquelle pénètre un axe de commande 54 couplant les deux galets de commande 20. La lumière 53 peut avoir toute forme appropriée ; elle a ici une forme en L à rainure 53z verticale, c'est-à-dire orientée selon la direction Z, et à rainure 53y horizontale, c'est-à-dire orientée selon la direction Y. Dans la rainure de commande 53y est engagé un axe de commande 54 couplant les galets 20a, 20b de sorte que le mouvement de l'axe engendré par le mouvement de la clé 17 provoque le déplacement du coulisseau 50 ; dans la rainure de guidage 53z est engagé l'arbre 21 sur lequel pivotent les quatre galets 20, 30, ceci contraignant le coulisseau 50 à se déplacer en translation selon la direction Z. L'arbre 21 est monté dans des paliers de parois 21a de la tête de commande, ces parois étant dimensionnées pour reprendre les efforts importants exercés sur l'arbre.In the embodiment illustrated in Figures 6 to 10, the switch safety includes two control rollers 20a, 20b, and two release rollers 30a, 30b coupled externally to these. The roller profiles are similar to those of the previous embodiment. The connection of the control rollers 20a, 20b with the pusher is constituted by a slide 50 provided with a tail 51 which forms the pusher itself and a stick 52 having a light 53 in which penetrates a control shaft 54 coupling the two control rollers 20. The light 53 can have any suitable shape; here it has a 53z groove L shape vertical, that is to say oriented in the direction Z, and with horizontal groove 53y, that is to say oriented in direction Y. In the control groove 53y is engaged a control axis 54 coupling the rollers 20a, 20b so that the movement of the axis generated by the movement of the key 17 causes the displacement of the slide 50; in the guide groove 53z is engaged the shaft 21 on which the four rollers 20, 30, this forcing the slide 50 to move in translation in direction Z. The shaft 21 is mounted in wall bearings 21a of the head control, these walls being sized to take up significant efforts exerted on the tree.

Le ressort de rappel 46 des galets rappelle également le coulisseau 50 en position haute de repos. Dans l'un ou l'autre des modes de réalisation décrits, on peut aussi prévoir pour le coulisseau un ressort de rappel spécifique. Bien que deux ressorts de rappel 45 soient associés aux verrous 40, on peut aussi prévoir pour les deux verrous un ressort de rappel commun. En variante, les galets de déblocage peuvent avoir un diamètre légèrement différent de celui du ou des galets de commande.The return spring 46 of the rollers also recalls the slide 50 in high rest position. In either of the embodiments described, it is possible to also provide a specific return spring for the slide. Although two return springs 45 are associated with locks 40, it is also possible to provide for two locks a common return spring. Alternatively, the release rollers may have a slightly different diameter from that of the roller (s) ordered.

Dans la variante illustrée sur les figures 11 et 12, un ressort de rappel 56 est associé à chaque galet de déblocage 30 ; pour faciliter la compréhension, le ou les galets de commande n'ont pas été représentés. Le ressort 56 est un ressort de torsion monté dans une pièce mince de support 60 elle-même emboítée ou encastrée sur une partie de son épaisseur dans une ouverture convenable 61 du galet de déblocage pour en être solidaire en rotation ; la pièce 60 peut bien entendu être assemblée d'une autre manière au galet de déblocage. La pièce 60 comprend un corps 62 profilé de manière à s'inscrire dans le profil des encoches 31,32 du galet 30 pour ne pas gêner la manoeuvre de la clé; le corps 62 présente des logements 63,64 pour les branches respectives 57,58 du ressort de torsion 56 ; la branche 57 s'applique contre une butée fixe 59 de la tête de commande 12.In the variant illustrated in FIGS. 11 and 12, a return spring 56 is associated with each release roller 30; to facilitate understanding, the or the control rollers have not been shown. Spring 56 is a spring of torsion mounted in a thin piece of support 60 itself nested or embedded over part of its thickness in a suitable opening 61 of the roller release to be integral in rotation; room 60 can of course be otherwise assembled with the release roller. Exhibit 60 includes a body 62 profiled so as to fit into the profile of the notches 31, 32 of the roller 30 so as not to interfere with the operation of the key; the body 62 has housings 63.64 for the respective branches 57, 58 of the torsion spring 56; branch 57 applies against a fixed stop 59 of the control head 12.

Dans la variante des figures 13 et 14, il est prévu un seul galet de commande 20 inséré entre deux galets de déblocage 30 ; pour une meilleure compréhension, on n'a représenté que le galet 20. Le coulisseau 50 loge, dans un évidement 51a de sa queue 51 qui forme le poussoir associé au bloc de contacts, les verrous 40 et leur ressort de rappel 45, les verrous étant guidés par des conformations convenables de l'évidement ; le coulisseau 50 présente à sa partie supérieure une crosse 52 en forme de fourche dont les bras 52a,52b enveloppent latéralement les galets 30. Chaque bras comprend une rainure verticale 53z de guidage et une rainure de commande 53f orientée selon un axe F incliné par rapport à la direction Y. Cette inclinaison permet d'engendrer une translation donnée du poussoir au moyen d'un déplacement angulaire des galets moindre que dans le cas des figures 6 à 10. Au point de convergence des rainures 53z,53f est prévu un renfoncement 53g afin de stabiliser au repos l'assise de l'axe 54 ; d'autre part, celui-ci se déplace dans une lumière 55 du galet 20. In the variant of Figures 13 and 14, there is provided a single roller control 20 inserted between two release rollers 30; for better understanding, only the roller 20 has been shown. The slide 50 houses, in a recess 51a of its tail 51 which forms the pusher associated with the contact block, the latches 40 and their return spring 45, the latches being guided by suitable conformations of the recess; the slide 50 presents in its part upper a fork-shaped stick 52 whose arms 52a, 52b envelop laterally the rollers 30. Each arm comprises a vertical groove 53z of guide and a control groove 53f oriented along an axis F inclined with respect to to direction Y. This inclination makes it possible to generate a given translation of the pusher by means of an angular displacement of the rollers less than in the case Figures 6 to 10. At the point of convergence of the grooves 53z, 53f is provided a indentation 53g in order to stabilize the seat of the axle 54 at rest; on the other hand, this one moves in a light 55 of the roller 20.

Le fonctionnement de l'interrupteur de sécurité va être décrit en regard des figures 8 à 10.The operation of the safety switch will be described opposite. Figures 8 to 10.

La tête de commande est illustrée en position de repos sur la figure 8, la clé de commande 17, liée à la porte d'enveloppe ou de machine, étant alors dégagée de l'interrupteur et le bloc de contacts étant alors sollicité par le poussoir 51. Lorsque la porte est fermée et que l'on veut alors autoriser la mise en oeuvre du système contrôlé, la clé de commande 17 s'introduit dans la fente 14 (ou dans la fente 16 selon le montage préalablement choisi). Comme on le voit sur la figure 9, les oreilles 19 de la clé commencent par s'appliquer sur le front avant 31a des encoches 31 et à provoquer une rotation des galets de déblocage 30 dans le sens horaire contre l'effort du ressort 46 ; le bandeau 18 n'est alors pas encore appliqué contre le front avant 24a des encoches 24 des galets de commande 20 ; les surfaces de came 33a des crans 33 repoussent les verrous 40 en comprimant leurs ressorts de rappel 45, puis le bandeau 18 s'applique contre les fronts 24a (voir figure 9) et les galets 20 alors déverrouillés commencent à tourner eux aussi en sens horaire. La clé 17 continue d'avancer et fait tourner de concert l'ensemble des galets 20,30 ; la rotation des galets de commande 20 entraíne la rotation de l'axe de commande 54 qui provoque la levée du coulisseau 50 guidé par sa queue-poussoir 51 dans l'alésage 41 et par la rainure 53z contre l'arbre 21. Le poussoir 51 se dégage de la pièce de commande 11a du bloc de contacts 11 et libère celui-ci dont les contacts commutent pour permettre la mise en oeuvre du système contrôlé (voir figure 10).The control head is illustrated in the rest position in FIG. 8, the control key 17, linked to the envelope or machine door, then being released of the switch and the contact block then being urged by the pusher 51. When the door is closed and we want to authorize the implementation of the system controlled, the control key 17 is inserted into the slot 14 (or into the slot 16 depending on the assembly previously chosen). As seen in Figure 9, the ears 19 of the key start by applying to the front edge 31a of the notches 31 and to cause the release rollers 30 to rotate clockwise against the force spring 46; the strip 18 is not yet applied against the front edge 24a of the notches 24 of the control rollers 20; the cam surfaces 33a of the notches 33 push the latches 40 back by compressing their return springs 45, then the strip 18 is applied against the fronts 24a (see FIG. 9) and the rollers 20 then unlocked also start to turn clockwise. Key 17 continues to move forward and rotate all of the rollers 20.30 in concert; the rotation of control rollers 20 causes the rotation of the control shaft 54 which causes the lifting of the slide 50 guided by its push-tail 51 in the bore 41 and by the groove 53z against the shaft 21. The pusher 51 is released from the control part 11a from the contact block 11 and releases the latter, the contacts of which switch for allow the implementation of the controlled system (see Figure 10).

Lorsque la porte s'ouvre, la clé de commande 17 se déplace en sens inverse dans la fente 14 et, par le talon arrière de la barrette 18, s'applique contre les fronts arrière 24b, 31b, des galets 20, 30, qui tournent ensemble en sens antihoraire, ce mouvement étant aidé par la détente du ressort 46 ; le coulisseau 50 redescend pour commuter les contacts du bloc 11. Les surfaces de came 33a des galets de déblocage 30 libèrent les verrous 40 qui se réinstallent sous l'effet de leurs ressorts 47 dans les crans 26 des galets de commande 20 et les crans 33 des galets 30, ce qui définit la position de butée de ces galets. Le dispositif se retrouve alors dans sa position de repos de la figure 8.When the door opens, the control key 17 moves in the direction reverse in the slot 14 and, by the rear heel of the bar 18, is applied against the rear edges 24b, 31b, rollers 20, 30, which rotate together counterclockwise, this movement being helped by the relaxation of the spring 46; slide 50 goes back down for switching the contacts of block 11. The cam surfaces 33a of the rollers release 30 release the latches 40 which are reinstalled under the effect of their springs 47 in the notches 26 of the control rollers 20 and the notches 33 of the rollers 30, this which defines the stop position of these rollers. The device is then found in its Figure 8 rest position.

Claims (11)

  1. Key-operated electric safety switch comprising a casing surmounted by a control head and housing organs of electrical contact, the control head including:
    a control roller (20) capable of turning on an axis (X) in order to control the contact organs via a push-button,
    at least one slot (14, 16) for the passage of a control key (17) capable of being inserted in the head (12) or extracted from it in a general direction perpendicular to the rotation axis so as to cooperate with a notch (24, 25) provided on the periphery of the roller and to cause said roller to pivot,
    an unlocking component associated with the control roller so as to unlock it through the application of the key against said component,
       characterized in that:
    a lock (40) of the control roller (20) is housed in the head (12) in such a way as to move perpendicularly to the rotation axis (X) of the roller (20) and is solicited elastically so as to be inserted in a catch (26) of the roller,
    the unlocking component (30) may be applied by means of a cam surface (33) against the lock (40) in order to free the catch when the key is inserted.
  2. Switch according to claim 1, characterized in that the unlocking component is a rotating roller (30) adjacent to and coaxial with the control roller (20), presenting on its periphery at least one notch (31, 32) for receiving the key, the shapes of the notches (24, 25) of the control roller and (31, 32) of the unlocking roller and the control key (17) being such that, when first introduced, the key actuates the unlocking roller before the control roller.
  3. Switch according to claim 2, characterized in that the notch (31, 32) of the unlocking roller (30) extends over an angle which is greater than the control roller (20).
  4. Switch according to claim 1, characterized in that two unlocking rollers (30a, 30b) are provided, these unlocking rollers being positioned symmetrically in relation to a central control roller (20), this central control roller being linked to the push-button (44) through the intermediary of a small connecting rod (42) articulated with the central control roller and the push-button.
  5. Switch according to claim 1, characterized in that two unlocking rollers (30a, 30b) are provided, these unlocking rollers being positioned symmetrically in relation to a central control roller (20), this central control roller being linked by an axis liaison (54) and control groove (53y; 53f) to the crosshead (52) of a slider (50) fitted with a tail (51) constituting the push-button.
  6. Switch according to claim 5, characterized in that the slider (50) is guided both by its tail (51) into a cylindrical aperture (41) of the control head or the casing and by a guiding groove (53z) of its crosshead (52) against the rotation shaft (41) of the control roller (20).
  7. Switch according to claims 4 or 5, characterized in that the central control roller (20) consists of two rollers (20a, 20b) each paired with an unlocking roller (30a, 30b).
  8. Switch according to claims 5 or 6, characterized in that the tail (51) of the slider (50) houses the lock(s) (40) and its (their) return spring(s) (45).
  9. Switch according to claims 5 or 6, characterized in that the crosshead (52) of the slider (50) presents arms (52a, 52b) which laterally envelop the unlocking rollers (30).
  10. Switch according to claim 5, characterized in that each unlocking roller (30) is firmly attached in rotation to a support component (60) of an individual return spring (56).
  11. Switch according to claim 5, characterized in that the control groove (53f) is oriented along an inclined axis (F).
EP96402610A 1995-12-05 1996-12-03 Safety switch with key Expired - Lifetime EP0778595B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9514949A FR2741993B1 (en) 1995-12-05 1995-12-05 ELECTRICAL KEY SAFETY SWITCH
FR9514949 1995-12-05

Publications (2)

Publication Number Publication Date
EP0778595A1 EP0778595A1 (en) 1997-06-11
EP0778595B1 true EP0778595B1 (en) 2001-08-16

Family

ID=9485585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402610A Expired - Lifetime EP0778595B1 (en) 1995-12-05 1996-12-03 Safety switch with key

Country Status (8)

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US (1) US5898143A (en)
EP (1) EP0778595B1 (en)
JP (1) JP3880668B2 (en)
KR (1) KR100262416B1 (en)
CN (1) CN1095180C (en)
DE (1) DE69614488T2 (en)
ES (1) ES2160219T3 (en)
FR (1) FR2741993B1 (en)

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ITVI980017A1 (en) * 1998-02-02 1999-08-02 Pizzato Elettrica Srl ELECTRIC SAFETY SWITCH
DE29803028U1 (en) * 1998-02-20 1998-04-09 Bernstein Hans Spezialfabrik Safety switch
JP4508434B2 (en) * 2001-01-29 2010-07-21 Ｉｄｅｃ株式会社 Safety switch
DE10106228A1 (en) * 2001-02-10 2002-09-19 Euchner Gmbh & Co Safety switch with unlocking disc
TW502864U (en) * 2001-09-07 2002-09-11 High Tech Comp Corp Power switch device which is easy to turn on and difficult to turn off
DE10308450A1 (en) * 2003-02-24 2004-09-16 E.G.O. Elektro-Gerätebau GmbH Rotary switch with switching shaft for an electrical device
GB0405543D0 (en) * 2004-03-10 2004-04-21 Eja Ltd Switch mechanism
JP4396478B2 (en) * 2004-10-21 2010-01-13 オムロン株式会社 Key switch
CN104347302B (en) * 2013-07-30 2016-12-07 上海雷尼威尔测量技术有限公司 Safety control
CN104347303B (en) * 2013-07-30 2016-08-10 上海球栅测量系统有限公司 Safety control
DE102015002863A1 (en) * 2015-03-06 2016-09-08 E. Dold & Söhne KG Safety switch arrangement
JP6737876B2 (en) * 2017-02-24 2020-08-12 Idec株式会社 Safety switch
CN111668042B (en) * 2020-06-19 2023-01-03 三实电器(漳州)有限公司 Application method of combined switch module with forced action mechanism
CN112018681B (en) * 2020-09-01 2021-09-28 盐城市华悦汽车部件有限公司 Fixing device convenient to electric automobile power supply pencil

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DE4436579C2 (en) * 1994-10-13 1997-05-22 Bernstein Hans Spezialfabrik Safety switch

Also Published As

Publication number Publication date
DE69614488T2 (en) 2001-11-29
KR100262416B1 (en) 2000-08-01
CN1095180C (en) 2002-11-27
EP0778595A1 (en) 1997-06-11
ES2160219T3 (en) 2001-11-01
FR2741993A1 (en) 1997-06-06
JPH09180587A (en) 1997-07-11
KR970051584A (en) 1997-07-29
DE69614488D1 (en) 2001-09-20
JP3880668B2 (en) 2007-02-14
CN1165387A (en) 1997-11-19
FR2741993B1 (en) 1998-01-16
US5898143A (en) 1999-04-27

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