EP1774552B1 - Dispositif de controle de l'etat d'un dispositif de protection - Google Patents

Dispositif de controle de l'etat d'un dispositif de protection Download PDF

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Publication number
EP1774552B1
EP1774552B1 EP05770018A EP05770018A EP1774552B1 EP 1774552 B1 EP1774552 B1 EP 1774552B1 EP 05770018 A EP05770018 A EP 05770018A EP 05770018 A EP05770018 A EP 05770018A EP 1774552 B1 EP1774552 B1 EP 1774552B1
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EP
European Patent Office
Prior art keywords
closed
hold
blocking
state
switch
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.)
Active
Application number
EP05770018A
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German (de)
English (en)
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EP1774552A1 (fr
Inventor
Bernd Hermann
Erik BÄCHLE
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.)
Euchner GmbH and Co KG
Original Assignee
Euchner GmbH and Co KG
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
Priority claimed from DE200410038488 external-priority patent/DE102004038488B4/de
Priority claimed from DE200410047574 external-priority patent/DE102004047574A1/de
Application filed by Euchner GmbH and Co KG filed Critical Euchner GmbH and Co KG
Publication of EP1774552A1 publication Critical patent/EP1774552A1/fr
Application granted granted Critical
Publication of EP1774552B1 publication Critical patent/EP1774552B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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 invention relates to a device for monitoring the state of a protective device, for example a protective device of a machine, in particular a safety switch for monitoring the closed state of a protective door or the like, with a locking function for the protective device.
  • a protective device for example a protective device of a machine, in particular a safety switch for monitoring the closed state of a protective door or the like, with a locking function for the protective device.
  • a safety switch is known in the switch head a defined for example on a protective door of a guard actuator is inserted when closing the guard while a ratchet wheel rotates.
  • a switch plunger of an electrical switch is held in contact with the peripheral surface of the switching wheel.
  • the switch plunger engages in a provided for this purpose on the peripheral surface of the ratchet locking recess and thereby includes a contact pair in the electrical switch. In this way, the inserted state of the actuator and thus the closed position of the protective door can be electrically signaled.
  • the safety switch also provides a locking function, d. H. that the actuator is lockable in the switch head, in particular with regard to the lead out of the switch head can be locked, and thereby the protective device can be locked in the closed state.
  • this is the switching plunger spring-loaded or magnetkraftbelastet held in the locking recess of the ratchet wheel, thereby locking the ratchet wheel against rotation and thus locks the actuator in the switch head.
  • the DE 34 30 090 A1 shows a safety switch, in which a longitudinally displaceable plunger is guided in the switch housing for actuating the switch, which is associated with a mechanical lock, the means of a in the switch housing insertable key is releasable.
  • a locking pin is also provided for fixing the plunger, which is electromechanically movable by an electrical release signal in its release position.
  • the DE 84 14 199 U1 shows a locking and safety device for a door, wherein in a power failure, the door lock can not be locked and continue in a power failure in the locked state, the door lock can not be unlocked.
  • the DE 202 18 714 U1 shows an emergency unlocking device for safety locking devices on doors, in particular on doors of housings for machine tools, which consists of a anytime and from any location to be operated remote release device, for example, consists of an electric emergency switch with a power supply independent of the machine control and their power supply.
  • the invention has for its object to provide a generic device, which overcomes the disadvantages of the prior art.
  • a device is to be provided with a locking device, which realizes both the function "guard locking in the de-energized state” and the function "prevention of activation of the tumbler in the de-energized state".
  • a permanent tumbler should be permanently guaranteed reliable and large Zuhalte guide be provided cost-effectively and robustly with structurally simple means. The manufacture, installation and maintenance of the device should be simplified and thereby save time and money.
  • the object is in a device for monitoring the state of a protective device, for example a protective device of a machine, in particular safety switch for monitoring the closed state of a protective door or the like, wherein the protective device has a first part with an opening and a second part, opposite to the the first part is movable and thereby the opening is at least partially closable, and wherein the device comprises a preferably to be arranged on the first part of the protection switch element and a preferably to be arranged on the second part of the protective device actuator, which causes an actuation of the switch element in the closed state of the protective device and characterized in that the closed state of the protective device can be signaled and monitored, and the device has a locking device with a locking element, by which the closed state of the Sch is releasably lockable and is locked in the de-energized state of the locking device, and the locking device can be activated by transferring the protective device from the open state to the closed state, achieved in that the device has a blocking device with
  • switch element and actuator it may be advantageous for many applications, an arrangement similar to the DE 43 28 297 C1 to choose, in particular, because the arrangement of a ratchet wheel, or more generally a cam, between the actuator and the switch actuating tappet effective tamper protection of the device is ensured, ie the switch element can not be manipulated with simple tools such that a safe state of the protective device is simulated Although the protective device is not in the closed state, in particular the actuator is not inserted in the switch element.
  • the locking device is activated by the fact that when closing the protective device, the cam rotates the cam until a locking ram, which is preferably at the same time part of the actual switch actuating plunger or at least coaxially arranged to this, engages in a radial locking recess of the cam and this determines against further rotation and especially a reverse rotation, and thereby locks the closed state of the protective device or the protective device holds.
  • a locking ram which is preferably at the same time part of the actual switch actuating plunger or at least coaxially arranged to this, engages in a radial locking recess of the cam and this determines against further rotation and especially a reverse rotation, and thereby locks the closed state of the protective device or the protective device holds.
  • the movement of the tumbler element is in any case so far blocked in that there is no arrest of the closed state of the protective device.
  • the switch actuating plunger of the electrical switch of the Wegerlements is blocked, so that an actuation of the switch element is prevented, which would signal a closed state of the protective device.
  • the actuator may be key-shaped, in particular in the manner of a mechanical coding by the special geometric shape, so that only corresponding geometrically formed actuator capable of turning the cam.
  • the protective device can be completely closed and the actuator can be inserted into the switch head, without mechanical damage to the device, for example, as a result of abutment of the actuator to blocked parts of the switch element to be feared.
  • the blocking takes place by a positive connection between the blocking element and the locking element.
  • positive connection is to be understood as a cooperation, which is given only by the shape and / or motion control of two abutting elements, in particular is independent of effective frictional forces between these elements.
  • the blocking element engages in a recess of the locking element.
  • blocking element and / or locking element are substantially pin-shaped and at least partially cylindrical.
  • the tumbler element has in sections on its lateral surface a cross-sectionally substantially rectangular annular groove into which the blocking element can engage.
  • the longitudinal axes of the tumbler and blocking element preferably include a right angle.
  • the blocking element is part of an electromagnet, in particular the armature of an electromagnet of the blocking device.
  • the blocking element In the energized state, the blocking element is held against the action of an accumulator arranged in the blocking device in a position by which the movement of the tumbler element is not blocked.
  • the blocking element In the de-energized state, the blocking element is moved by the action of the force accumulator in the direction of the locking element, and engages there, if the protective device is not already in the closed state, in a recess in the locking element such that this is at least blocked so far, that closing of the protective device does not lead to a locking of the closed state.
  • the blocking element actuates a switch by means of which the position of the blocking element can be signaled.
  • the switch is a commercially available electrical switching element.
  • other switching elements come into question, in particular contactless switching elements, such as optical switching elements such as light barriers or magnetic switching elements such as Hall sensors or reed switches.
  • the blocking element can be designed as a switch actuating tappet for the switch of the blocking device.
  • the switch may be arranged coaxially with the blocking element.
  • the locking device has a further element, which is rotatable and / or displaceable upon insertion of the actuator into the device.
  • This further element or the locking element can engage in a recess of the actuator and be locked in this position and thereby lock the closed state of the protection device.
  • this further element of the locking device is a ratchet or a shift drum, and in the closed state of the protective device, the position of this further element can be locked by the locking element.
  • the locking device on a Fehlschbach puzzle through which the tumbler is activated only when the guard is in the closed position. This will prevent a
  • the higher-level control device erroneously assumes that the protective device is closed, although this is actually not the case.
  • the Fehlschsted Anlagen can be realized in different ways.
  • Fig. 1 shows a schematic plan view of an overall arrangement with a device 1 according to the invention for monitoring the state of a protective device 2 of a machine 3, in particular the closed state of a protective door, with a Room separation device is closed, for example, to protect the operating personnel from hazards caused by the machine 3 in operation.
  • the device 2 has a first part 4, for example a frame for the protective device 2.
  • the first part 4 has an opening 5 which can be closed by a second part 6, for example by a protective door corresponding to the double arrow 10 with respect to the first Part 4 is movably supported by bearing elements 11.
  • the device 1 has a safety switch which comprises a preferably arranged on the fixed first part 4 of the protection device 2 switch element 7 and a preferably arranged on the movable second part 6 actuator 8.
  • FIG. 2 shows a section through an exemplary embodiment of the device 1 according to the invention.
  • a cam plate 14, which is pivotable about an axis of rotation 13, is mounted in a switch head 12.
  • the cam plate 14 On its peripheral surface 15, the cam plate 14 has a first recess 16a, in which a cam 17 of the actuator 8 can engage when the actuator 8 is inserted via a first opening 30a in the switch head 12.
  • the cam disc 14 has an angular offset of about 90 ° relative to the first recess 16a about the rotation axis 13, a second recess 16b, in which the cam 17 of the actuator 8 can engage when the actuator 8 via a second opening 30b in the switch head 12th is introduced.
  • the outer surfaces of the substantially cuboid and in particular cubic switch head 12, where the first and second openings 30a, 30b are arranged, include a right angle. in the illustrated state, the actuator 8 is not yet introduced into the switch head 12, hence the second part 6 of the protection device 2 is not yet in the fully closed position.
  • the switch head 12 is fixedly connected to the switch element 7 of the device 1.
  • an elongated locking element 18 is mounted longitudinally movable, which is Mogliedrig in the illustrated embodiment, but in principle can also be integrally formed.
  • the locking element 18 is at least partially made of a magnetizable material or has a magnetizable shell 23 which is formed as an armature of a coil 24 further comprising an electromagnet.
  • the coil 24 When the coil 24 is energized, the jacket 23 is pulled into the region of the coil 24, thereby moving the locking element 18 away from the cam 14 against the action of a force accumulator 20 designed as a helical spring. Thereby, the switching disk 14 is released for movement, in particular for a lead out of the actuator 8 from the switch head 12 and thus for opening the protective device 2 by pushing back the second part.
  • the cam disc 14 has an angular offset of about 135 ° with respect to the first recess 16a about the rotation axis 13, a third recess 19, in which the locking element 18 in the closed state of the protective device 2, ie when inserted into the switch head 12 actuator 8, can intervene and thereby locks the closed state.
  • the energy accumulator 20 is supported on the one hand on the stationary switch housing 21, and on the other hand on a flange-like widening 22 of the locking element 18.
  • the switch element 7 has a known electrical switch 25, the switch actuating plunger 26 is arranged coaxially and in particular in extension of the locking element 18 and aligned.
  • energy storage of the switch actuating plunger 26 is held in contact with the locking element 18 and thus follows its movement.
  • both the operating state shown in FIG. 2 can be signaled by the electrical switch 25, for example by opening an electrical switching contact, as well as the state in which the locking element 18 engages in the recess 19 of the cam 14, thus the ratchet and thus the closed state of the protective device 2 locked, for example by opening the switch contact.
  • the protective device 2 is opened or at least not in the locked closed state and the device 1 is de-energized.
  • the inventive design of the device 1 with a blocking device 40 would be the locking element 18 due to the action of the energy storage 20 in contact with the cam 14, and upon closing of the protection device 2, the actuator 8 would turn the cam 14 by about 90 ° counterclockwise and the locking element 18 would be in the third Snap recess 19 and thus lock the cam 14 and thus the closed state of the safety device 2.
  • the blocking device 40 is arranged in the transition region between the switch head 12 and the switch housing 7.
  • a in the housing part 42 in the longitudinal direction movably guided and aligned at right angles to the tumbler element 18 blocking element 41, the tumbler element 18 in its in Fig. 2 illustrated, the rotational movement of the cam disc 14 releasing position releasably block.
  • the blocking element 41 which is
  • the blocking element 41 which is
  • the blocking element 41 actuates a further electrical switch 45 and is in abutment with the associated switch actuating plunger 46.
  • the blocking element 41 is biased in the direction of the locking element 18, either by a force accumulator such as a Coil spring, which acts on the blocking element 41 and the housing part 42 and may be arranged, for example, in the region between the armature and the further coil 44, or by the further electrical switch 45 and acting on the switch actuating plunger 46 spring.
  • a force accumulator such as a Coil spring
  • the blocking element 41 which is formed as a whole of three elements consists of an armature element 41a, which is essentially T-shaped in cross-section. shaped end portion formed in an opening having an undercut opening of a driver 41 b, which is thereby coupled in motion with the armature member 41 a.
  • the driver 41 b is in turn connected to a blocking member 41 c motion coupled, for example screwed or pressed with this.
  • a sealing element 49 is arranged, for example, a bellows-like membrane to prevent ingress of moisture and / or impurities.
  • the blocking member 41 c has at its the Zuhalteelement 18 facing the end of a tapered cylindrical pin which engages positively in the position shown in an introduced into the locking element 18, in cross-section substantially rectangular annular groove 47.
  • the blocking member 41c is guided in a preferably substantially and apart from an eccentric axial bore 48a axisymmetric and in particular rotationally cylindrical guide bushing 48, which also closes the housing part 42 the front side.
  • the position of the blocking flank 47a formed by the annular groove 47 which includes a substantially right angle with the longitudinal axis of the tumbler element 18, is selected such that the tumbler element 18 does not engage in a blocking engagement of the blocking member 41c on the peripheral surface 15 of the cam 14 abuts, but has a small distance thereof.
  • the locking element 18 On the side facing away from the cam plate 14, the locking element 18 has a further annular groove 43, which may be of greater axial extent.
  • the blocking member 41c engages when in the closed state of the protective device 2, the locking element 18 engages in the third recess 19 of the switching disk 14, and the further coil 44 is de-energized.
  • the blocking element 41 is limited in this case by a mechanical stop in its movement in the direction of the locking element 18 such that the front end of the blocking member 41 c is not in contact with the parallel to the longitudinal axis of the locking member 18 extending bottom surface of the further annular groove 43. Characterized a friction between the blocking member 41 c and the locking member 18 is avoided when the locking member 18 is moved out by energizing the coil 24 from the third recess 19 to release the locking of the locked state of the protective device 2.
  • the further annular groove 43 has, on its side facing the annular groove 47, a sliding flank 43a which, with the longitudinal axis of the locking element 18, has an angle of less than 90 °, in particular less than 60 ° and preferably less than 45 °.
  • this can be set up in several spatial directions, thereby simplifying the mounting of the device to the protection device 2, and the device 1 even can be adapted to the respective structural conditions at the installation site; in the case of a rotationally symmetrical configuration in this connection region, the blocking device 40 can even be arranged rotatable all around, in which case appropriate measures for sealing the connection point can be taken if necessary.

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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)
  • Crushing And Grinding (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Burglar Alarm Systems (AREA)

Claims (10)

  1. Dispositif (1) de contrôle de l'état d'un dispositif de protection (2), en particulier d'un interrupteur de sécurité, pour contrôler si une porte de protection ou un élément comparable est fermé, le dispositif de protection (2) ayant une première partie (4) munie d'une ouverture (5') et une deuxième partie (6) mobile par rapport à la première partie (4), ce qui permet de fermer au moins en partie l'ouverture (5), et
    - le dispositif (1) comporte un élément de commutation (7) à placer de préférence sur la première partie (4) du dispositif de protection (2) et un actionneur (8), à placer de préférence sur la deuxième partie (6) du dispositif de protection (2), qui provoque l'actionnement de l'élément de protection (7) quand le dispositif de protection (2) est à l'état fermé, ce qui permet de signaler que le dispositif de protection (2) est à l'état fermé et de le contrôler,
    - et le dispositif (1) comporte un dispositif de maintien muni d'un élément de maintien (18) qui permet de maintenir de manière amovible l'état fermé du dispositif de protection (2) et qui est bloqué quand le dispositif de maintien est hors tension, et le dispositif de maintien peut être activé par le passage du dispositif de protection (2) de l'état ouvert à l'état fermé,
    caractérisé
    - en ce que le dispositif (1) comporte un dispositif de blocage (40) muni d'un élément de blocage (41) et
    - en ce que, quand l'élément de blocage (41) est hors tension, le dispositif de maintien est empêché d'être activé par un blocage du mouvement qu'exécute l'élément de maintien (18) du dispositif de maintien et qui a pour effet de maintenir l'état fermé du dispositif de protection (2).
  2. Dispositif (1) selon la revendication 1, caractérisé en ce que, à l'état hors tension quand le dispositif de maintien n'est pas activé, il y a une liberté pour un mouvement relatif entre l'actionneur (8) et l'élément de commutation (7).
  3. Dispositif (1) selon la revendication 1 ou 2, caractérisé en ce que lors du blocage l'élément de blocage (41) est en contact par combinaison de formes avec l'élément de maintien (18).
  4. Dispositif (1) selon l'une des revendications 1 à 3, caractérisé en ce que l'élément de maintien (18) comporte sur sa surface extérieure une cavité, par exemple une rainure annulaire (47), dans laquelle l'élément de blocage (41) pénètre lors du blocage.
  5. Dispositif (1) selon l'une des revendications 1 à 4, caractérisé en ce que l'élément de blocage (41) peut se déplacer obliquement, en particulier transversalement, à l'élément de maintien (18).
  6. Dispositif (1) selon l'une des revendications 1 à 5, caractérisé en ce que l'élément de blocage (41) fait partie d'un électroaimant du dispositif de blocage (40) qui permet de maintenir l'élément de blocage (41) sous tension à l'encontre de l'action d'un accumulateur de force dans une position qui ne bloque pas le mouvement de l'élément de maintien (18).
  7. Dispositif (1) selon l'une des revendications 1 à 6, caractérisé en ce que l'élément de blocage (41) actionne un interrupteur (45) qui permet de signaler la position de l'élément de blocage (41), l'interrupteur (45) étant de préférence disposé coaxialement à l'élément de blocage (41).
  8. Dispositif (1) selon l'une des revendications 1 à 7, caractérisé en ce que, quand le dispositif de protection (2) est à l'état fermé, un élément du dispositif de maintien pénètre dans une cavité (16) de l'actionneur (8), ce qui maintient l'état fermé du dispositif de protection (2).
  9. Dispositif (1) selon l'une des revendications 1 à 8, caractérisé en ce que le dispositif de maintien comporte une came (14) qui peut tourner dans l'élément de commutation (7), que l'actionneur (8) peut faire tourner et qui maintient l'actionneur (8) dans l'état fermé du dispositif de protection (2) et en ce que la rotation de la came (14) peut être maintenu par l'élément de maintien (41).
  10. Dispositif (1) selon l'une des revendications 1 à 9, caractérisé en ce que le dispositif de maintien comporte une sécurité de non-fermeture, qui permet d'activer uniquement le maintien quand le dispositif de protection (2) est à l'état fermé.
EP05770018A 2004-08-07 2005-08-01 Dispositif de controle de l'etat d'un dispositif de protection Active EP1774552B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200410038488 DE102004038488B4 (de) 2004-08-07 2004-08-07 Vorrichtung zum Überwachen des Zustandes einer Schutzeinrichtung einer Maschine
DE200410047574 DE102004047574A1 (de) 2004-09-27 2004-09-27 Vorrichtung zum Überwachen des Zustandes einer Schutzeinrichtung
PCT/EP2005/008303 WO2006015752A1 (fr) 2004-08-07 2005-08-01 Dispositif de controle de l'etat d'un dispositif de protection

Publications (2)

Publication Number Publication Date
EP1774552A1 EP1774552A1 (fr) 2007-04-18
EP1774552B1 true EP1774552B1 (fr) 2007-12-05

Family

ID=35064908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05770018A Active EP1774552B1 (fr) 2004-08-07 2005-08-01 Dispositif de controle de l'etat d'un dispositif de protection

Country Status (7)

Country Link
US (1) US20080264766A1 (fr)
EP (1) EP1774552B1 (fr)
JP (1) JP4763696B2 (fr)
AT (1) ATE380389T1 (fr)
DE (1) DE502005002179D1 (fr)
ES (1) ES2294729T3 (fr)
WO (1) WO2006015752A1 (fr)

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DE102011119413A1 (de) * 2011-11-21 2013-05-23 Euchner Gmbh + Co. Kg Vorrichtung zum Steuern des Betriebs einer Maschine, Sperreinsatz für eine solche Vorrichtung und zugehöriges Betriebsverfahren
DE102012021968B4 (de) * 2012-10-31 2015-10-22 Euchner Gmbh + Co. Kg Vorrichtung zum lösbaren Arretieren eines vorgebbaren Zustandes einer Einrichtung sowie Sicherheitsschalter mit einer solchen Vorrichtung
ITVI20130290A1 (it) * 2013-12-06 2015-06-07 Pizzato Elettrica Srl Interruttore di sicurezza ad azionamento elettronico
TWI538002B (zh) * 2014-12-08 2016-06-11 普易科技股份有限公司 開關結構
IT201600096402A1 (it) * 2016-09-26 2018-03-26 Pizzato Elettrica Srl Interruttore di sicurezza con rilevamento dell’azionamento di un comando ausiliario di sblocco

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Also Published As

Publication number Publication date
JP4763696B2 (ja) 2011-08-31
ES2294729T3 (es) 2008-04-01
JP2008509508A (ja) 2008-03-27
DE502005002179D1 (de) 2008-01-17
ATE380389T1 (de) 2007-12-15
WO2006015752A1 (fr) 2006-02-16
US20080264766A1 (en) 2008-10-30
EP1774552A1 (fr) 2007-04-18

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