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EP1533826A1 - Safety position switch - Google Patents

Safety position switch Download PDF

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Publication number
EP1533826A1
EP1533826A1 EP04105613A EP04105613A EP1533826A1 EP 1533826 A1 EP1533826 A1 EP 1533826A1 EP 04105613 A EP04105613 A EP 04105613A EP 04105613 A EP04105613 A EP 04105613A EP 1533826 A1 EP1533826 A1 EP 1533826A1
Authority
EP
European Patent Office
Prior art keywords
pusher
locking
locking head
main axis
axis
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Withdrawn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
EP04105613A
Other languages
German (de)
French (fr)
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
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1533826A1 publication Critical patent/EP1533826A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H27/007—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 switch being lockable by remote control, e.g. by electromagnet

Definitions

  • the present invention relates to a safety position switch of the type comprising a pusher that responds to the movement of an actuator linked to a device to be secured, so as to move along a main axis to take a rest position and a position work, comprising an electrical member, in particular a switchable contact block depending on the position of the pusher, by means of a transmission mechanism lockable urged by the pusher, and comprising a mechanism locking member transmission, which has a locking head of the mechanism, the locking head being able to take a locking position and an unlocking position.
  • safety position switch will be replaced in this which follows by the expression “safety switch”.
  • the locking member of the transmission mechanism is frequently made under electromagnet form laterally disposed at the actuator / pusher / block assembly of contacts. It can also be a manually operated member, for example by key, or a pneumatic member or any other similar motor member.
  • the invention aims to meet these desiderata.
  • the transmission mechanism comprises a pivoting lever adapted to take a locking position and an unlocking position; the pivoting lever is requested to from the pusher such that translational movement of the pusher generates a rotation of the lever, and the pivoting lever is provided with an applicable wedging element, in the locking position of the lever and transversely to the main axis, against the head blocking.
  • the mechanism thus described makes it possible to jam the locking head by a space-saving mechanism, with an effort of jamming that is easy to predetermine. It also unlocks the safety switch while the actuator is under load. This means that, while the actuator is subjected to a significant extraction effort out of the switch head, the locking member, in particular the electromagnet, can nevertheless be switched from its lock state to its state. unlocking. It is also possible to define the transmission mechanism as having a deformable wedging system under the effect of the movement of the pusher, this system being provided with a stop for the locking head in the direction of the main axis and of an element. jamming exerting on the locking head a force transverse to the main axis when the actuator tends to be removed from the housing of the switch.
  • the lever is pivotally mounted about an axis perpendicular to the axis main and is arranged so that the force applied to the locking head is reduced compared to to the force exerted by the actuator, in a ratio allowing, while the actuator is under load and following an unlocking command of the locking member, a moving the locking head.
  • the locking head can move in translation along the main axis and the pivoting lever forming a stop striker for the end of the locking head in the locking position and a bearing slope adjacent to the striker, the end of the locking head applying then, especially under the effect of a spring, against the slope in the unlocked position.
  • the transmission mechanism may comprise a slide mounted in the housing for move parallel, especially coaxially, to the main axis, the slide being coupled on the one hand in translation to the pusher and on the other hand by a slide or cam at pivoting lever.
  • the pivoting lever has for example a fork shape flanking the slide for apply on bearings provided on an axis located at the end of the locking head, a span being provided in the center of the axis to apply on the slide the latch exerts a lateral thrust.
  • the safety position switch illustrated in FIG. 1 comprises in a housing 10 a electrical switch block 11, in particular a block of contacts, and a drive mechanism 12 for switching the switch block.
  • Mechanism 12 acts on block 11 in response to the approaching or moving movement of a relative actuator 13 to the housing (see arrow F1).
  • the actuator is equipped with specific means of recognition mechanical and, where appropriate, electronic, and is for example associated with an organ 14 (grid, obstacle, ..) Assistant to a dangerous machine M.
  • the safety switch has at least one rotary roller 15 or other element with forms adapted to cooperate with particular forms of the actuator 13 and capable of block the actuator when it is inserted into the housing 10.
  • the roller 15 is housed in a head 16 of the housing 10 of the switch and acts on a pusher 17 included in the head and able to take, depending on whether the actuator 13 is coupled or not coupled to the roller, a rest position (low position in the figures) or a working position (position high on the figures).
  • the head 16 is mounted on the housing in a rotating manner - so to allow different orientations of the actuator; the mechanism allows this rotation of the head without changing the state of the contacts of the switch block 11.
  • the drive mechanism 12 interposed between the pusher 17 and the switch block 11 is lockable, that is, it can be released or blocked by a locking member 20.
  • This member 20 is an electromagnet, a key operated by an operator, an organ pneumatic or any other similar motor unit (see, for example, EP 817,227 and FR 2,751,122).
  • the member 20 is an electromagnet, it comprises a coil 21 and a core 22, which core ends with a locking head 23 which constitutes the locking part of the mechanism.
  • the blocking head 23 blocks the mechanism in a only direction, that is to say prohibits the passage of the pusher from its working position to its position rest, without prohibiting the transition from the rest position to the working position.
  • a control system S is associated with the machine M to control the running and stopping (Sa link); the system S can also receive the information "state of the contacts of the block 11 "(connection Sb) and also control the switching of the electromagnet 20 (connection Sc).
  • the drive mechanism 12 comprises according to the invention a slide 30 and a lever pivoting member 40 forming a deformable system, under the effect of the movement of the pusher, for pinch the locking head.
  • the slider 30 is mounted on a support, such as a wall of the housing 10 or a base reported in this housing, to move in translation along an axis X 'parallel to the axis main X movement of the pusher 17 (see Figures 2 to 9).
  • the housing 10 extends according to the direction X, with arrangement of the core 22 of the electromagnet 20 parallel to the axis X of the pusher and, preferably, in alignment with the axis X.
  • the blocking head 23 of the core has an axis 24 transverse to X, which carries two lateral rollers 25 and a central roller 26 whose function will be explained later.
  • the slider 30 has a coupling element 31, such as a finger or fork, coupled to the lower end of the pusher 17, preferably in an annular groove of the pusher, to allow rotation of the head 16 of the case, without change of state of the contacts of the block 11 nor of the blocking system.
  • the element coupling 31 could also be simply applied against the end of the pusher by a spring.
  • the slide 30 has at least one slide 32 or other form of guide determining the translation of the slide, and cooperating with two fixed axes of guidance 33,34.
  • the slider 30 has a control pin 35 a little offset laterally with respect to the axis X '.
  • a lateral face 36 of the slider 30 can be requested by the central roller 26 of the locking head 23, as will be described later.
  • the pivoting lever 40 is associated with the locking head 23 of the locking core 22 which is located towards the pusher 17.
  • the pivoting lever 40 serves to block the core 22 in its high position (working position) when the actuator 13 is introduced into the head 16 of the housing 10.
  • the lever 40 is pivotally mounted about a Y axis perpendicular to the axis X and has for this purpose a pin 41 mounted on the fixed axis 33, which therefore serves on the one hand pivot and on the other hand guide axis for the slide 32.
  • the Y axis is located, in the X direction, substantially between the pusher 17 and the locking head 23.
  • the lever 40 also has a curved slide 42 to cooperate with the pin 35. The specific form of the slide is intended to appropriately rotate the lever 40 around the axis 33.
  • the lever 40 forms a locking arm 43 which terminates at its free end by an element wedge 44 for exerting transverse pressure on the side rollers 25.
  • the lever 40 forms a stop striker in which can be housed the head of 23.
  • FIG. 2 illustrates an embodiment in which the contact block 11 is actuated directly by the slider 30, the contacts then being the image of the state. of the actuator.
  • the block 11 can also be actuated directly by the pusher 17.
  • the actuator 13 is removed from the head 16 of the switch, so that the pusher 17 is placed in the down position.
  • the coupled slider 30 the pusher is also placed in the lower position and, via the pin 35, pushes the lever 40 counterclockwise in release position.
  • the core 22 of the electromagnet shown in the low position in Figures 4 and 6, is in an unlocked state. This state corresponds according to the case to the excitation or to the de-excitation of the coil 21 of the electromagnet 20 (in the latter case, the core 22 is pushed upwards by a spring and remains in equilibrium with the lower surface 46 of the lever 40).
  • the actuator is engaged in the head 16 of the switch, and the pusher 17 rises by driving the slider 30.
  • the slider 30 forces the lever 40 to rotate clockwise to the specified position.
  • Figures 5 and 7. If the coil 21 is (or remains) excited, the core 22 remains in position low. If the coil 21 is (or remains) de-energized, the lower surface 46 of the lever slides on the rollers 25 of the core 22, then the rollers 25 engage in the space between the wedging elements 44 and the lateral face 36 of the slider 30 and remain housed in high stop in the strike 45 formed by this space.
  • any force exerted on the actuator to extract it from the head 16 of the switch implements a wedging effect of elements 44 on the blocking head 23, all the more important that the extraction effort is big; the force can not damage the electromagnet because the roller 26 carried by the axis 24 of the locking head 23 is applied against the lateral face 36 of the slider 30.
  • the resulting effort is thus taken up by the guiding of the core and, via the axes 33,34, by the housing.
  • lever arms “pivot 33-pin 35” and “pivot 33-elements of 44” are mutually determined to significantly reduce the effort communicated to the core, following the solicitation of the actuator in the direction of extraction, and thus to unlock the locking member while the lever 40 is tightened on the locking head 23.
  • the switch shown allows a rotation of the head 16 relative to the rest of the housing without changing the state of the contacts of the switch block 11 nor the state of the drive mechanism or the locking member.
  • Figures 8 and 9 exploded parts of the drive mechanism 12 and in particular illustrate guides provided in the head 16 for the pusher 17 and in the main part of the housing 10 for the core.
  • the pebbles 25 and 26 mounted on the axis 24 which is associated with the locking head 23 and the realization of the pivot lever 40 in the fork gripping the slide 30, each branch of the fork acting on a roller 25 disposed on the axis 24.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Lock And Its Accessories (AREA)
  • Push-Button Switches (AREA)

Abstract

The switch has a drive mechanism with a rotating lever (40) taking locking and unlocking positions. The lever is pushed from a push button (17) so that translation displacement of the button rotates the lever. The button responds to the displacement of an actuator. A locking arm (43) has a wedging unit applied against a locking head (23) of a locking unit, in the locking position and transversal to a main axis (X).

Description

La présente invention concerne un interrupteur de position de sécurité du type comprenant un poussoir qui répond au déplacement d'un actionneur lié à un dispositif à sécuriser, de façon à se déplacer selon un axe principal pour prendre une position repos et une position travail, comprenant un organe électrique, notamment un bloc de contacts, commutable en fonction de la position du poussoir, au moyen d'un mécanisme de transmission verrouillable sollicité par le poussoir, et comprenant un organe de verrouillage du mécanisme de transmission, qui présente une tête de blocage du mécanisme, la tête de blocage étant apte à prendre une position de verrouillage et une position de déverrouillage.The present invention relates to a safety position switch of the type comprising a pusher that responds to the movement of an actuator linked to a device to be secured, so as to move along a main axis to take a rest position and a position work, comprising an electrical member, in particular a switchable contact block depending on the position of the pusher, by means of a transmission mechanism lockable urged by the pusher, and comprising a mechanism locking member transmission, which has a locking head of the mechanism, the locking head being able to take a locking position and an unlocking position.

Pour simplifier, l'expression " interrupteur de position de sécurité " sera remplacée dans ce qui suit par l'expression " interrupteur de sécurité ".For simplicity, the expression "safety position switch" will be replaced in this which follows by the expression "safety switch".

On connaít par exemple d'après le document EP 817 227 des interrupteurs de sécurité du type décrit ci-dessus. Ces interrupteurs sont associés à des dispositifs à sécuriser tels que des machines dangereuses.For example, it is known from document EP 817 227 that safety switches type described above. These switches are associated with devices to be secured such as dangerous machines.

L'organe de verrouillage du mécanisme de transmission est fréquemment réalisé sous forme d'électroaimant disposé latéralement à l'ensemble tête d'actionnement / poussoir /bloc de contacts. Il peut aussi être un organe à commande manuelle, par exemple à clé, ou un organe pneumatique ou tout autre organe moteur analogue.The locking member of the transmission mechanism is frequently made under electromagnet form laterally disposed at the actuator / pusher / block assembly of contacts. It can also be a manually operated member, for example by key, or a pneumatic member or any other similar motor member.

D'autres interrupteurs de sécurité ont un agencement allongé, ou de type "vertical", pour que l'électroaimant de verrouillage soit situé dans l'axe du poussoir et du bloc de contacts à actionner (voir par exemple EP 801 801). Cette configuration est avantageuse pour répondre à certaines prescriptions d'encombrement des interrupteurs. Cependant, les interrupteurs de ce type ne dissocient pas suffisamment le mouvement de l'organe de verrouillage vis à vis de celui du poussoir.Other safety switches have an elongated or "vertical" arrangement for that the locking electromagnet is located in the axis of the pusher and the block of contacts to be actuated (see for example EP 801 801). This configuration is advantageous for responding to certain requirements of size of the switches. However, the switches of this type do not dissociate sufficiently the movement of the locking member opposite that of the pusher.

Il est souhaitable de réaliser un interrupteur de sécurité possédant un mécanisme d'entraínement verrouillable fiable et peu encombrant, autorisant néanmoins certaines libertés de mise en oeuvre, telles qu'une rotation de la tête de manoeuvre, sans altérer l'état de certains composants de l'interrupteur. De plus, il est souhaitable de bien conserver la fonction de sécurité dévolue à l'interrupteur quand des efforts d'extraction sont exercés sur l'actionneur et, le cas échéant, de pouvoir déverrouiller l'interrupteur alors que l'actionneur est sous charge.It is desirable to provide a safety switch having a drive mechanism Lockable reliable and space-saving, allowing certain freedoms implementation, such as rotation of the actuating head, without altering the state of some components of the switch. In addition, it is desirable to keep the safety function assigned to the switch when extraction forces are exerted on the actuator and, if necessary, to be able to unlock the switch while the actuator is under load.

L'invention a pour but de répondre à ces desiderata.The invention aims to meet these desiderata.

Selon l'invention, le mécanisme de transmission comporte un levier pivotant apte à prendre une position de blocage et une position de déblocage ; le levier pivotant est sollicité à partir du poussoir de façon telle qu'un déplacement en translation du poussoir engendre une rotation du levier, et le levier pivotant est doté d'un élément de coincement applicable, dans la position de blocage du levier et transversalement à l'axe principal, contre la tête de blocage.According to the invention, the transmission mechanism comprises a pivoting lever adapted to take a locking position and an unlocking position; the pivoting lever is requested to from the pusher such that translational movement of the pusher generates a rotation of the lever, and the pivoting lever is provided with an applicable wedging element, in the locking position of the lever and transversely to the main axis, against the head blocking.

Le mécanisme ainsi décrit permet de coincer la tête de blocage par un mécanisme peu encombrant, avec un effort de coincement facile à prédéterminer. Il permet aussi de déverrouiller l'interrupteur de sécurité alors que l'actionneur est sous charge. Cela signifie que, alors que l'actionneur étant soumis à un effort notable d'extraction hors de la tête de l'interrupteur, l'organe de verrouillage, notamment l'électroaimant, peut néanmoins être commuté de son état de verrouillage vers son état de déverrouillage.
On peut aussi définir le mécanisme de transmission comme comportant un système de coincement déformable sous l'effet du déplacement du poussoir, ce système étant doté d'une butée pour la tête de blocage dans la direction de l'axe principal et d'un élément de coincement exerçant sur la tête de blocage un effort transversal à l'axe principal quand l'actionneur tend à être retiré du boítier de l'interrupteur.The mechanism thus described makes it possible to jam the locking head by a space-saving mechanism, with an effort of jamming that is easy to predetermine. It also unlocks the safety switch while the actuator is under load. This means that, while the actuator is subjected to a significant extraction effort out of the switch head, the locking member, in particular the electromagnet, can nevertheless be switched from its lock state to its state. unlocking.
It is also possible to define the transmission mechanism as having a deformable wedging system under the effect of the movement of the pusher, this system being provided with a stop for the locking head in the direction of the main axis and of an element. jamming exerting on the locking head a force transverse to the main axis when the actuator tends to be removed from the housing of the switch.

Il est avantageux que le levier soit monté pivotant autour d'un axe perpendiculaire à l'axe principal et soit agencé pour que l'effort appliqué à la tête de blocage soit réduit par rapport à l'effort subi par l'actionneur, dans un rapport permettant, alors que l'actionneur est sous charge et suite à une commande de déverrouillage de l'organe de verrouillage, un déplacement de la tête de blocage.It is advantageous that the lever is pivotally mounted about an axis perpendicular to the axis main and is arranged so that the force applied to the locking head is reduced compared to to the force exerted by the actuator, in a ratio allowing, while the actuator is under load and following an unlocking command of the locking member, a moving the locking head.

La tête de blocage peut se déplacer en translation selon l'axe principal et le levier pivotant former une gâche de butée pour l'extrémité de la tête de blocage en position de verrouillage et une pente d'appui adjacente à la gâche, l'extrémité de la tête de blocage s'appliquant alors, notamment sous l'effet d'un ressort, contre la pente en position de déverrouillage. The locking head can move in translation along the main axis and the pivoting lever forming a stop striker for the end of the locking head in the locking position and a bearing slope adjacent to the striker, the end of the locking head applying then, especially under the effect of a spring, against the slope in the unlocked position.

Le mécanisme de transmission peut comporter un coulisseau monté dans le boítier pour se déplacer parallèlement, notamment coaxialement, à l'axe principal, le coulisseau étant couplé d'une part en translation au poussoir et d'autre part par une glissière ou came au levier pivotant.The transmission mechanism may comprise a slide mounted in the housing for move parallel, especially coaxially, to the main axis, the slide being coupled on the one hand in translation to the pusher and on the other hand by a slide or cam at pivoting lever.

Le levier pivotant a par exemple une forme de fourchette encadrant le coulisseau pour s'appliquer sur des portées prévues sur un axe situé à l'extrémité de la tête de verrouillage, une portée étant prévue au centre de l'axe pour s'appliquer sur le coulisseau le verrou exerce une poussée latérale.The pivoting lever has for example a fork shape flanking the slide for apply on bearings provided on an axis located at the end of the locking head, a span being provided in the center of the axis to apply on the slide the latch exerts a lateral thrust.

La description détaillée qui suit, en regard des dessins annexés, illustre un mode de réalisation donné à titre d'exemple.

  • La figure 1 représente schématiquement un interrupteur de position de sécurité associé à une machine dangereuse.
  • La figure 2 illustre un premier mode de réalisation de l'interrupteur de sécurité conforme à l'invention, à l'état verrouillé.
  • La figure 3 illustre un second mode de réalisation, à l'état déverrouillé.
  • Les figures 4 et 5 montrent le mécanisme d'entraínement, à l'état déverrouillé et respectivement à l'état verrouillé.
  • Les figures 6 et 7 sont des vues agrandies du détail A des figures 4 et 5.
  • Les figures 8 et 9 sont deux vues en perspective éclatée, de gauche et respectivement de droite, d'une partie de l'interrupteur de sécurité selon l'invention.
    • The detailed description which follows, with reference to the accompanying drawings, illustrates an embodiment given by way of example.
  • Figure 1 schematically shows a safety position switch associated with a dangerous machine.
  • FIG. 2 illustrates a first embodiment of the safety switch according to the invention, in the locked state.
  • Figure 3 illustrates a second embodiment, in the unlocked state.
  • Figures 4 and 5 show the drive mechanism, in the unlocked state and respectively in the locked state.
  • Figures 6 and 7 are enlarged views of detail A of Figures 4 and 5.
  • Figures 8 and 9 are two views in exploded perspective, left and right respectively, of a portion of the safety switch according to the invention.

    • L'interrupteur de position de sécurité illustré sur la figure 1 comprend dans un boítier 10 un bloc interrupteur électrique 11, notamment un bloc de contacts, et un mécanisme d'entraínement 12 destiné à commuter le bloc interrupteur. Le mécanisme 12 agit sur le bloc 11 en réponse au mouvement d'approche ou d'éloignement d'un actionneur 13 relativement au boítier (voir flèche F1). L'actionneur est doté de moyens spécifiques de reconnaissance mécaniques et le cas échéant électroniques, et il est par exemple associé à un organe de protection 14 (grille, obstacle, ..) adjoint à une machine dangereuse M. The safety position switch illustrated in FIG. 1 comprises in a housing 10 a electrical switch block 11, in particular a block of contacts, and a drive mechanism 12 for switching the switch block. Mechanism 12 acts on block 11 in response to the approaching or moving movement of a relative actuator 13 to the housing (see arrow F1). The actuator is equipped with specific means of recognition mechanical and, where appropriate, electronic, and is for example associated with an organ 14 (grid, obstacle, ..) Assistant to a dangerous machine M.

    L'interrupteur de sécurité présente au moins un galet rotatif 15 ou autre élément doté de formes propres à coopérer avec des formes particulières de l'actionneur 13 et capable de bloquer l'actionneur quand celui-ci est introduit dans le boítier 10. Le galet 15 est logé dans une tête 16 du boítier 10 de l'interrupteur et agit sur un poussoir 17 inclus dans la tête et capable de prendre, selon que l'actionneur 13 est couplé ou non couplé au galet, une position de repos (position basse sur les figures) ou une position de travail (position haute sur les figures). La tête 16 est montée sur le boítier de manière tournante - afin d'autoriser différentes orientations de l'actionneur ; le mécanisme permet cette rotation de la tête sans changement de l'état des contacts du bloc interrupteur 11.The safety switch has at least one rotary roller 15 or other element with forms adapted to cooperate with particular forms of the actuator 13 and capable of block the actuator when it is inserted into the housing 10. The roller 15 is housed in a head 16 of the housing 10 of the switch and acts on a pusher 17 included in the head and able to take, depending on whether the actuator 13 is coupled or not coupled to the roller, a rest position (low position in the figures) or a working position (position high on the figures). The head 16 is mounted on the housing in a rotating manner - so to allow different orientations of the actuator; the mechanism allows this rotation of the head without changing the state of the contacts of the switch block 11.

    Le mécanisme d'entraínement 12 interposé entre le poussoir 17 et le bloc interrupteur 11 est verrouillable, c'est-à-dire qu'il peut être libéré ou bloqué par un organe de verrouillage 20. Cet organe 20 est un électroaimant, une clé manoeuvrée par un opérateur, un organe pneumatique ou tout autre organe moteur analogue (voir par exemple les documents EP 817 227 et FR 2 751 122). Quand l'organe 20 est un électroaimant, il comprend une bobine 21 et un noyau 22, lequel noyau se termine par une tête de blocage 23 qui constitue la pièce de blocage du mécanisme. La tête de blocage 23 bloque le mécanisme dans une seule direction, c'est-à-dire interdit le passage du poussoir de sa position travail à sa position repos, sans interdire le passage de la position repos à la position travail.The drive mechanism 12 interposed between the pusher 17 and the switch block 11 is lockable, that is, it can be released or blocked by a locking member 20. This member 20 is an electromagnet, a key operated by an operator, an organ pneumatic or any other similar motor unit (see, for example, EP 817,227 and FR 2,751,122). When the member 20 is an electromagnet, it comprises a coil 21 and a core 22, which core ends with a locking head 23 which constitutes the locking part of the mechanism. The blocking head 23 blocks the mechanism in a only direction, that is to say prohibits the passage of the pusher from its working position to its position rest, without prohibiting the transition from the rest position to the working position.

    Un système de commande S est associé à la machine M pour en piloter la marche et l'arrêt (liaison Sa) ; le système S peut aussi recevoir l'information "état des contacts du bloc 11" (liaison Sb) et commander aussi la commutation de l'électroaimant 20 (liaison Sc).A control system S is associated with the machine M to control the running and stopping (Sa link); the system S can also receive the information "state of the contacts of the block 11 "(connection Sb) and also control the switching of the electromagnet 20 (connection Sc).

    Le mécanisme d'entraínement 12 comprend selon l'invention un coulisseau 30 et un levier pivotant 40 formant un système déformable, sous l'effet du déplacement du poussoir, pour coincer la tête de blocage.The drive mechanism 12 comprises according to the invention a slide 30 and a lever pivoting member 40 forming a deformable system, under the effect of the movement of the pusher, for pinch the locking head.

    Le coulisseau 30 est monté sur un support, tel qu'une paroi du boítier 10 ou une embase rapportée dans ce boítier, pour se déplacer en translation selon un axe X' parallèle à l'axe principal X de déplacement du poussoir 17 (voir figures 2 à 9). Le boítier 10 s'étend selon la direction X, avec disposition du noyau 22 de l'électroaimant 20 parallèle à l'axe X du poussoir et, de préférence, en alignement avec l'axe X. La tête de blocage 23 du noyau présente un axe 24 transversal à X, qui porte deux galets latéraux 25 et un galet central 26 dont la fonction sera expliquée plus loin. Le coulisseau 30 a un élément de couplage 31, tel qu'un doigt ou une fourche, attelé à l'extrémité inférieure du poussoir 17, de préférence dans une gorge annulaire du poussoir, pour autoriser une rotation de la tête 16 du boítier, sans changement d'état des contacts du bloc 11 ni du système de blocage. L'élément de couplage 31 pourrait aussi être simplement appliqué contre l'extrémité du poussoir par un ressort. Le coulisseau 30 présente au moins une coulisse 32 ou autre forme de guidage déterminant la translation du coulisseau, et coopérant avec deux axes fixes de guidage 33,34. Enfin le coulisseau 30 présente un pion de commande 35 un peu décalé latéralement par rapport à l'axe X'. Une face latérale 36 du coulisseau 30 peut être sollicitée par le galet central 26 de la tête de blocage 23, comme il sera décrit plus loin.The slider 30 is mounted on a support, such as a wall of the housing 10 or a base reported in this housing, to move in translation along an axis X 'parallel to the axis main X movement of the pusher 17 (see Figures 2 to 9). The housing 10 extends according to the direction X, with arrangement of the core 22 of the electromagnet 20 parallel to the axis X of the pusher and, preferably, in alignment with the axis X. The blocking head 23 of the core has an axis 24 transverse to X, which carries two lateral rollers 25 and a central roller 26 whose function will be explained later. The slider 30 has a coupling element 31, such as a finger or fork, coupled to the lower end of the pusher 17, preferably in an annular groove of the pusher, to allow rotation of the head 16 of the case, without change of state of the contacts of the block 11 nor of the blocking system. The element coupling 31 could also be simply applied against the end of the pusher by a spring. The slide 30 has at least one slide 32 or other form of guide determining the translation of the slide, and cooperating with two fixed axes of guidance 33,34. Finally the slider 30 has a control pin 35 a little offset laterally with respect to the axis X '. A lateral face 36 of the slider 30 can be requested by the central roller 26 of the locking head 23, as will be described later.

    Le levier pivotant 40 est associé à la tête de blocage 23 du noyau de verrouillage 22 qui est située vers le poussoir 17. Le levier pivotant 40 a pour fonction de bloquer le noyau 22 dans sa position haute (position de travail) quand l'actionneur 13 est introduit dans la tête 16 du boítier 10. Le levier 40 est monté pivotant autour d'un axe Y perpendiculaire à l'axe principal X et présente à cet effet un tourillon 41 monté sur l'axe fixe 33, qui sert donc d'une part de pivot et d'autre part d'axe de guidage pour la coulisse 32. L'axe Y est situé, dans la direction X, sensiblement entre le poussoir 17 et la tête de blocage 23. Le levier 40 présente aussi une glissière 42 incurvée pour coopérer avec le pion 35. La forme spécifique de la glissière a pour but de faire pivoter de façon appropriée le levier 40 autour de l'axe 33.The pivoting lever 40 is associated with the locking head 23 of the locking core 22 which is located towards the pusher 17. The pivoting lever 40 serves to block the core 22 in its high position (working position) when the actuator 13 is introduced into the head 16 of the housing 10. The lever 40 is pivotally mounted about a Y axis perpendicular to the axis X and has for this purpose a pin 41 mounted on the fixed axis 33, which therefore serves on the one hand pivot and on the other hand guide axis for the slide 32. The Y axis is located, in the X direction, substantially between the pusher 17 and the locking head 23. The lever 40 also has a curved slide 42 to cooperate with the pin 35. The specific form of the slide is intended to appropriately rotate the lever 40 around the axis 33.

    Le levier 40 forme un bras de blocage 43 qui se termine à son extrémité libre par un élément de coincement 44 destiné à exercer une pression transversale sur les galets latéraux 25. Le levier 40 forme une gâche de butée dans laquelle peut venir se loger la tête de blocage 23. A la partie du levier située vers la tête 23 est prévue une surface convexe ou une pente 46 sur laquelle s'applique la tête 23 quand l'organe de verrouillage 20 est dans son état de déverrouillage.The lever 40 forms a locking arm 43 which terminates at its free end by an element wedge 44 for exerting transverse pressure on the side rollers 25. The lever 40 forms a stop striker in which can be housed the head of 23. At the portion of the lever located towards the head 23 is provided a convex surface or a slope 46 on which the head 23 applies when the locking member 20 is in its unlock status.

    La figure 2 illustre un mode de réalisation dans lequel le bloc de contacts 11 est actionné directement par le coulisseau 30, les contacts étant alors l'image de l'état. de l'actionneur. Le bloc 11 peut aussi être actionné directement par le poussoir 17. La figure 3 montre un mode de réalisation dans lequel le bloc de contacts 11 est actionné à partir du noyau 22, les contacts étant alors l'image de l'état de l'électroaimant. FIG. 2 illustrates an embodiment in which the contact block 11 is actuated directly by the slider 30, the contacts then being the image of the state. of the actuator. The block 11 can also be actuated directly by the pusher 17. FIG. embodiment in which the contact block 11 is actuated from the core 22, the contacts then being the image of the state of the electromagnet.

    Le fonctionnement de l'interrupteur va être expliqué en regard des figures 4 à 7.The operation of the switch will be explained with reference to FIGS. 4 to 7.

    Dans le cas illustré par les figures 4 et 6, l'actionneur 13 est retiré de la tête 16 de l'interrupteur, de sorte que le poussoir 17 est placé en position basse. Le coulisseau 30 couplé au poussoir est mis aussi en position basse et, via le pion 35, repousse le levier 40 dans le sens antihoraire en position de déblocage. Cela signifie que le noyau 22 de l'électroaimant, illustré en position basse sur les figures 4 et 6, est dans un état de déverrouillage. Cet état correspond selon les cas à l'excitation ou à la désexcitation de la bobine 21 de l'électroaimant 20 (dans ce dernier cas, le noyau 22 est poussé vers le haut par un ressort et reste en équilibre contre la surface inférieure 46 du levier 40).In the case illustrated in FIGS. 4 and 6, the actuator 13 is removed from the head 16 of the switch, so that the pusher 17 is placed in the down position. The coupled slider 30 the pusher is also placed in the lower position and, via the pin 35, pushes the lever 40 counterclockwise in release position. This means that the core 22 of the electromagnet, shown in the low position in Figures 4 and 6, is in an unlocked state. This state corresponds according to the case to the excitation or to the de-excitation of the coil 21 of the electromagnet 20 (in the latter case, the core 22 is pushed upwards by a spring and remains in equilibrium with the lower surface 46 of the lever 40).

    Pour passer à l'état illustré par les figures 5 et 7, l'actionneur est engagé dans la tête 16 de l'interrupteur, et le poussoir 17 remonte en entraínant le coulisseau 30. A l'aide du pion 35, le coulisseau 30 force le levier 40 à pivoter en sens horaire jusqu' à la position ind i-quée figures 5 et 7. Si la bobine 21 est (ou reste) excitée, le noyau 22 reste en position basse. Si la bobine 21 est (ou reste) désexcitée, la surface inférieure 46 du levier glisse sur les galets 25 du noyau 22, puis les galets 25 s'engagent dans l'espace situé entre les éléments de coincement 44 et la face latérale 36 du coulisseau 30 et restent logés en butée haute dans la gâche 45 formée par cet espace. Tout effort exercé sur l'actionneur pour l'extraire de la tête 16 de l'interrupteur met en oeuvre un effet de coincement des éléments 44 sur la tête de blocage 23, d'autant plus important que l'effort d'extraction est grand ; l'effort ne peut endommager l'électroaimant, car le galet 26 porté par l'axe 24 de la tête de blocage 23 s'applique contre la face latérale 36 du coulisseau 30. L'effort résultant est ainsi repris par le guidage du noyau et, via les axes 33,34, par le boítier.To go to the state illustrated in FIGS. 5 and 7, the actuator is engaged in the head 16 of the switch, and the pusher 17 rises by driving the slider 30. With the aid of the pawn 35, the slider 30 forces the lever 40 to rotate clockwise to the specified position. Figures 5 and 7. If the coil 21 is (or remains) excited, the core 22 remains in position low. If the coil 21 is (or remains) de-energized, the lower surface 46 of the lever slides on the rollers 25 of the core 22, then the rollers 25 engage in the space between the wedging elements 44 and the lateral face 36 of the slider 30 and remain housed in high stop in the strike 45 formed by this space. Any force exerted on the actuator to extract it from the head 16 of the switch implements a wedging effect of elements 44 on the blocking head 23, all the more important that the extraction effort is big; the force can not damage the electromagnet because the roller 26 carried by the axis 24 of the locking head 23 is applied against the lateral face 36 of the slider 30. The resulting effort is thus taken up by the guiding of the core and, via the axes 33,34, by the housing.

    Il convient d'observer que les bras de levier "pivot 33-pion 35" et "pivot 33-éléments de serrage 44" sont mutuellement déterminés pour réduire fortement l'effort communiqué au noyau, consécutivement à la sollicitation de l'actionneur dans le sens de l'extraction, et permettre ainsi de déverrouiller l'organe de verrouillage alors que le levier 40 est serré sur la tête de blocage 23. It should be noted that the lever arms "pivot 33-pin 35" and "pivot 33-elements of 44 "are mutually determined to significantly reduce the effort communicated to the core, following the solicitation of the actuator in the direction of extraction, and thus to unlock the locking member while the lever 40 is tightened on the locking head 23.

    L'interrupteur représenté autorise une rotation de la tête 16 par rapport au reste du boítier sans changer l'état des contacts du bloc interrupteur 11 ni l'état du mécanisme d'entraínement ou de l'organe de verrouillage.The switch shown allows a rotation of the head 16 relative to the rest of the housing without changing the state of the contacts of the switch block 11 nor the state of the drive mechanism or the locking member.

    Les figures 8 et 9 montrent de façon éclatée les pièces composant le mécanisme d'entraínement 12 et illustrent en particulier des guidages prévus dans la tête 16 pour le poussoir 17 et dans la partie principale du boítier 10 pour le noyau. On voit notamment les galets 25 et 26 montés sur l'axe 24 qui est associé à la tête de blocage 23 et la réalisation du levier pivotant 40 en fourche enserrant le coulisseau 30, chaque branche de la fourche agissant sur un galet 25 disposé sur l'axe 24.Figures 8 and 9 exploded parts of the drive mechanism 12 and in particular illustrate guides provided in the head 16 for the pusher 17 and in the main part of the housing 10 for the core. We see in particular the pebbles 25 and 26 mounted on the axis 24 which is associated with the locking head 23 and the realization of the pivot lever 40 in the fork gripping the slide 30, each branch of the fork acting on a roller 25 disposed on the axis 24.

    Claims (7)

    Interrupteur de position de sécurité comprenant dans un boítier : un poussoir (17) qui répond au déplacement d'un actionneur (13) lié à un dispositif à sécuriser, de façon à se déplacer selon un axe principal (X) pour prendre une position repos et une position travail, un organe électrique (11), notamment un bloc de contacts, commutable en fonction de la position du poussoir, au moyen d'un mécanisme de transmission verrouillable (12) sollicité par le poussoir, un organe (20) de verrouillage du mécanisme de transmission, cet organe présentant une tête (23) de blocage du mécanisme, apte à prendre une position de verrouillage et une position de déverrouillage, caractérisé par le fait que : le mécanisme de transmission (12) comporte un levier pivotant (40) apte à prendre une position de blocage et une position de déblocage, le levier pivotant (40) est sollicité à partir du poussoir (17) de façon telle qu'un déplacement en translation du poussoir engendre une rotation du levier, le levier pivotant (40) est doté d'un élément de coincement (44) applicable, dans la position de blocage du levier et transversalement à l'axe principal (X), contre la tête de blocage (23). Safety position switch comprising in a housing: a pusher (17) which responds to the movement of an actuator (13) connected to a device to be secured, so as to move along a main axis (X) to assume a rest position and a work position, an electric member (11), in particular a contact block, switchable according to the position of the pusher, by means of a lockable transmission mechanism (12) biased by the pusher, a member (20) for locking the transmission mechanism, this member having a locking head (23) of the mechanism, adapted to take a locking position and an unlocking position, characterized by the fact that : the transmission mechanism (12) comprises a pivoting lever (40) capable of taking a locking position and an unlocking position, the pivoting lever (40) is biased from the pusher (17) such that translational movement of the pusher causes rotation of the lever, the pivoting lever (40) is provided with a wedging element (44) which can be applied in the locking position of the lever and transversely to the main axis (X) against the locking head (23). Interrupteur de position selon la revendication 1, caractérisé par le fait que le levier pivotant (40) est monté et agencé pour que l'effort appliqué à la tête de blocage (23) soit réduit par rapport à l'effort subi par l'actionneur (13), dans un rapport permettant, alors que l'actionneur est sous charge et suite à une commande de déverrouillage de l'organe de verrouillage (20), un déplacement de la tête de blocage (23).Position switch according to claim 1, characterized in that the pivoting lever (40) is mounted and arranged so that the force applied to the locking head (23) is reduced relative to the force exerted on the actuator. (13), in a ratio allowing, while the actuator is under load and following an unlocking command of the locking member (20), a displacement of the locking head (23). Interrupteur de position selon la revendication 1, caractérisé par le fait que la tête de blocage (23) se déplace en translation selon l'axe principal (X) et que le levier pivotant (40) forme une gâche de butée (45) pour l'extrémité de la tête de blocage (23) en position de verrouillage et une pente d'appui (46) adjacente à la gâche, l'extrémité de la tête de blocage (23) s'appliquant notamment sous l'effet d'un ressort contre la pente (46) en position de déverrouillage. Position switch according to claim 1, characterized in that the locking head (23) moves in translation along the main axis (X) and that the pivoting lever (40) forms a stop striker (45) for the end of the locking head (23) in the locking position and a bearing slope (46) adjacent to the striker, the end of the locking head (23) applying in particular under the effect of a spring against the slope (46) in the unlocked position. Interrupteur de position selon la revendication 1, caractérisé par le fait que le levier (40) est monté pivotant autour d'un axe (Y) perpendiculaire à l'axe principal (X) et que le mécanisme de transmission (12) comporte un coulisseau (30) monté dans le boítier pour se déplacer parallèlement, notamment coaxialement, à l'axe principal, le coulisseau (30) étant couplé d'une part en translation au poussoir (17) et d'autre part par une glissière ou came au levier pivotant (40).Position switch according to claim 1, characterized in that the lever (40) is pivotally mounted about an axis (Y) perpendicular to the main axis (X) and that the transmission mechanism (12) comprises a slider (30) mounted in the housing to move parallel, including coaxially, to the main axis, the slide (30) being coupled firstly in translation to the pusher (17) and secondly by a slide or cam at pivoting lever (40). Interrupteur de position selon la revendication 4, caractérisé par le fait que le levier pivotant (40) est monté sur un pivot fixe formant axe de guidage pour le coulisseau.Position switch according to claim 4, characterized in that the pivoting lever (40) is mounted on a fixed pivot forming a guide axis for the slide. Interrupteur de position selon la revendication 4, caractérisé par le fait que le levier pivotant (40) a une forme de fourchette encadrant le coulisseau (30) pour s'appliquer sur des portées (25) prévues sur un axe (24) situé à l'extrémité de la tête de verrouillage (23), une portée (26) étant prévue au centre de l'axe (24) pour s'appliquer sur le coulisseau (30) le verrou exerce une poussée latérale.Position switch according to Claim 4, characterized in that the pivoting lever (40) has a fork-like shape which surrounds the slide (30) to be applied to bearing surfaces (25) provided on an axis (24) situated at end of the locking head (23), a bearing (26) being provided in the center of the axis (24) to apply on the slide (30) the latch exerts a lateral thrust. Interrupteur de position de sécurité comprenant dans un boítier un poussoir (17) répondant au déplacement d'un actionneur de façon à se déplacer selon un axe principal pour prendre une position repos et une position travail selon l'état d'un dispositif à sécuriser, un organe électrique (11), notamment un bloc de contacts, commutable en fonction de la position du poussoir, au moyen d'un mécanisme de transmission verrouillable sollicité par le poussoir, un organe de verrouillage du mécanisme de transmission, cet organe présentant une tête de blocage (23) qui fait face au poussoir et est déplaçable selon un axe parallèle à l'axe principal ou confondu avec l'axe principal, caractérisé par le fait que le mécanisme de transmission (12) comporte un système de coincement (30,40) déformable sous l'effet du déplacement du poussoir (17), ce système étant doté d'une butée pour la tête de blocage (23) dans la direction de l'axe principal (X) et d'un élément de coincement (44) exerçant sur la tête de blocage un effort transversal à l'axe principal quand l'actionneur (13) tend à être retiré du boítier (10) de l'interrupteur. Safety position switch comprising in a housing a pusher (17) responding to the displacement of an actuator so as to move along a main axis to assume a rest position and a working position according to the state of a device to be secured, an electrical member (11), in particular a contact block, switchable according to the position of the pusher, by means of a lockable transmission mechanism biased by the pusher, a locking member of the transmission mechanism, this member having a locking head (23) which faces the pusher and is movable along an axis parallel to the main axis or coincides with the main axis, characterized by the fact that the transmission mechanism (12) comprises a wedging system (30, 40) deformable under the effect of the movement of the pusher (17), this system being provided with a stop for the locking head (23) in the direction of the main axis (X) and a wedging element (44) exerting on the locking head a force transverse to the main axis when the actuator (13) tends to be removed from the housing (10) of the light switch.
    EP04105613A 2003-11-21 2004-11-09 Safety position switch Withdrawn EP1533826A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0313651A FR2862810B1 (en) 2003-11-21 2003-11-21 SAFETY POSITION SWITCH
    FR0313651 2003-11-21

    Publications (1)

    Publication Number Publication Date
    EP1533826A1 true EP1533826A1 (en) 2005-05-25

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    EP04105613A Withdrawn EP1533826A1 (en) 2003-11-21 2004-11-09 Safety position switch

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    US (1) US6982391B2 (en)
    EP (1) EP1533826A1 (en)
    JP (1) JP2005251726A (en)
    CN (1) CN1619743A (en)
    FR (1) FR2862810B1 (en)

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    Also Published As

    Publication number Publication date
    US20050109593A1 (en) 2005-05-26
    FR2862810B1 (en) 2006-01-06
    FR2862810A1 (en) 2005-05-27
    JP2005251726A (en) 2005-09-15
    US6982391B2 (en) 2006-01-03
    CN1619743A (en) 2005-05-25

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