EP0666582B1 - Dispositif d'interrupteur de sécurité enfermé dans un boîtier - Google Patents

Dispositif d'interrupteur de sécurité enfermé dans un boîtier Download PDF

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Publication number
EP0666582B1
EP0666582B1 EP94119905A EP94119905A EP0666582B1 EP 0666582 B1 EP0666582 B1 EP 0666582B1 EP 94119905 A EP94119905 A EP 94119905A EP 94119905 A EP94119905 A EP 94119905A EP 0666582 B1 EP0666582 B1 EP 0666582B1
Authority
EP
European Patent Office
Prior art keywords
switch
locking
safety switch
locking lever
switch device
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
EP94119905A
Other languages
German (de)
English (en)
Other versions
EP0666582A1 (fr
Inventor
Dipl. Ing. Rolf Wecke
Dipl. Ing. Roland Mönnings
Ralf Leggewie
Dipl.-Des. Meinhard Gerner
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.)
Bernstein Classic GmbH and Co
Original Assignee
Bernstein Classic GmbH and Co
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 Bernstein Classic GmbH and Co filed Critical Bernstein Classic GmbH and Co
Publication of EP0666582A1 publication Critical patent/EP0666582A1/fr
Application granted granted Critical
Publication of EP0666582B1 publication Critical patent/EP0666582B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 switching device enclosed by a housing according to the preamble of claim 1 (EP-A-0 553 883).
  • these safety switching devices are designed so that they lock the protective devices until they stand still and there is no risk of injury when intervening.
  • the protective device can only be opened when the key can be removed from the housing enclosing the safety switching device, the plunger then being displaced axially in such a way that it actuates the electrical switch, as a result of which the circuit of the machine motor is interrupted.
  • electromagnetically actuated locking devices are known (EP 0 553 885, DE 38 10 287) with which the axial mobility is possible the plunger is blocked until one, for example the control interrogating the standstill of the machine signals a release, so that only in this case the locking device is disengaged and the plunger is movable. While moving it at the same time, the key can be removed and the protective device unlocked.
  • a disadvantage of the known safety switching devices is that the arrangement of the locking device is not readily selectable, so that an adaptation to changed machine-side conditions that is sometimes necessary is not possible.
  • the present invention is therefore based on the object of designing a safety switching device of the generic type in such a way that the placement of the locking device within the housing is freely selectable, depending on the requirement.
  • the switch actuated by the switching wheel and the locking device can in principle be arranged at any point within an angular range of 360 °.
  • the essence of the invention is that the switch is no longer actuated directly by the plunger, but practically via a deflection.
  • the switch like the blocking device or a monitoring switch coupled to it, is transverse to the direction of movement the plunger can be arranged.
  • An arrangement in which all three components mentioned are arranged laterally to the tappet is particularly space-saving.
  • the locking device When the locking device is actuated, which, as mentioned, is carried out by an appropriately designed machine control, the monitoring switch is actuated simultaneously by the locking lever and a switch on the machine is interrupted.
  • the switching wheel is locked by engaging the Locking lever, the locking lever being pivoted accordingly by the spring force of the locking device or by a spring bolt acting separately on the locking lever, the activation switch is released at the same time by actuating the monitoring switch.
  • the monitoring switch remains in its interrupted position since the locking lever is not actuated.
  • a safety switching device shown in the figures is enclosed by a housing 1 and can be actuated with a key 2 which can be inserted therein.
  • the safety device consists of a plunger 3 which can be actuated by the key 2 and which is axially displaceably mounted, wherein in the operating positions shown in FIGS. 1, 3 and 4 it engages in the key 2 in a manner known per se, that is to say assumes an uppermost position .
  • the plunger 3 in the exemplary embodiments shown in FIGS. 1 to 3 is provided with a pin 14 which is guided in an elongated hole 15 of a cam disk 5 which forms a ratchet wheel and is pivotably mounted on a shaft 17 .
  • the tappet 3 is moved up or down in accordance with the rotational movement of the cam disk 5.
  • a switch 4 Transverse to the plunger 3, a switch 4 is arranged, with which a machine motor (not shown) can be switched on or off, a switching element 13 of the switch 4 engaging in a curved recess in the cam disk 5 and likewise being moved axially during its pivoting movement, so that each after the position of the cam disc 5 and after the position of the tappet 3 the machine motor is switched on or off.
  • the cam disc 5 is further provided with a nose 10 into which a a pivoting blocking hook 9 engages a locking lever 8.
  • the locking lever 8 is mounted on a pivot axis 11, around which it can be pivoted.
  • a monitoring switch 7 is arranged on the locking lever 8, the switching pin of which carries out a parallel, but opposite, lifting movement to the lifting movement of the locking device 6.
  • the lock can be released via an emergency release in the form of a cam 16 coupled to the locking device 6, although this requires a special tool that is not accessible to everyone.
  • the locking device 6 is connected in the region to the locking lever 8 which is assigned to the cam disk 5.
  • the safety switching device In a position corresponding to FIG. 1, which results when the machine motor is in the switched-on operating state, the safety switching device is released as a whole and consequently access to machine parts previously protected by protective devices by energizing the electromagnetically actuated locking device 6, in which the connected locking lever 8 in Direction of the locking device 6 is moved.
  • the excitation command is issued by a machine controller that monitors the run-on time of the machine parts.
  • the plunger 3 By releasing the locking lever 8 from its blocking position, the plunger 3 can be moved freely, so that the key 2 can be pulled out of the housing. Because of this, which inevitably takes place in a known manner Axial displacement of the plunger 3, the cam disc is pivoted so that it actuates the switching element 13 by means of the curved recess 12 such that the switch 4 interrupts the electrical line to the machine motor. An unintentional switch-on of the machine with the protective devices open is therefore excluded.
  • FIG. 2 This position can be seen in FIG. 2.
  • the locking lever 8 is pivoted out or the locking device 6 is tightened by the electromagnet, the switching pin 18 of the monitoring switch 7 is pulled out.
  • a connected, not shown switch on the machine is interrupted. If a malfunction of the locking device 6 now occurs, for example due to a break in a spring with which the locking lever 8 is pivoted into the locking position according to FIG. 1 after the electromagnet has been switched off, so that the locking lever 8 remains in its position shown in FIG. 2 , the monitoring switch 7 also remains in this position in which the switch is interrupted. It is not possible to start up the machine without repairing the damage, which represents a significant safety improvement.
  • FIG. 4 Such an embodiment variant is shown in FIG. 4. Both the locking device 6 and the monitoring switch 7 and the switch 4 are arranged laterally to the plunger 3, so that the direction of movement of their switching elements is transverse to that of the plunger 3.
  • the monitoring switch 7 is arranged here on the switch 4, which means a particularly space-saving design.
  • the ratchet wheel is designed in the form of a camshaft 19, on which a crank 20 is articulated, which is connected to the switching element 13 of the switch 4, so that the camshaft 19 is rotated accordingly, depending on the tappet movement, of the switch 4.
  • the tappet 3 is connected in an articulated manner to the camshaft 19, with a deflection caused by the rotational movement being readily accepted.
  • a spring bolt 21 is provided which is supported on an arm of the locking lever 8 and presses the hook 9 into the camshaft 19 in such a way that the nose 10 is securely engaged.
  • an electromagnetically actuated locking device can be used which is not spring-loaded in the excited or de-energized position. This means that a very simple embodiment of a magnetic switch can be used, which then does not have to have a spring.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Mechanisms For Operating Contacts (AREA)

Claims (12)

  1. Dispositif de coupure électrique de sécurité entouré par un boîtier (1), avec un poussoir (3) actionnable au moyen d'une clé (2) introduite dans le boîtier (1), monté de manière à pouvoir coulisser axialement suivant son axe longitudinal, lequel poussoir est en liaison active avec un interrupteur électrique (4), coupant un moteur de machine, de manière que, suivant la position du poussoir (3), l'interrupteur (4) est fermé ou ouvert, et avec un dispositif de blocage (6) actionnable électromagnétiquement, la clé (2) ne pouvant être extraite du boîtier (1) qu'après excitation de ce dispositif de blocage (6), du fait que le dispositif de blocage (6) bloque une roue de commande (5, 19) et le poussoir (3) articulé sur celle-ci, caractérisé en ce que la roue de commande (5, 19) est déplaçable par le poussoir (3) et peut être immobilisée au moyen d'un levier de blocage (8), relié au dispositif de blocage (6), et en ce que l'interrupteur (4) peut être actionné par la roue de commande (5, 19), le levier de blocage (8) et l'interrupteur (4) étant en liaison directe avec la roue de commande (5, 19).
  2. Dispositif de coupure de sécurité selon la revendication 1, caractérisé en ce que la roue de commande est conformée en disque à came (5) ou en arbre à came (19).
  3. Dispositif de coupure de sécurité selon la revendication 1, caractérisé en ce qu'à l'extrémité du levier de blocage (8), opposée au dispositif de blocage (6), il est prévu un interrupteur de surveillance (7) relié électriquement avec un contacteur côté machine, le levier de blocage étant monté de manière à pouvoir pivoter sur un axe de pivotement (11), fixé entre l'interrupteur de surveillance (7) et le dispositif de blocage (6).
  4. Dispositif de coupure de sécurité selon la revendication 1, caractérisé en ce que le levier de blocage (8) présente un crochet (9), qui passe derrière un ergot (10) de la roue de commande en position de blocage.
  5. Dispositif de coupure de sécurité selon la revendication 2, caractérisé en ce que le poussoir est pourvu, à son extrémité tournée à l'opposé de la clé (2), d'un tenon (14) qui est guidé dans un trou oblong (15) du disque à came (5).
  6. Dispositif de coupure de sécurité selon la revendication 2, caractérisé en ce que l'organe de commutation (13) de l'interrupteur (4) se trouve à l'intérieur d'un évidement (12) du type d'une courbe du disque à came (5).
  7. Dispositif de coupure de sécurité selon la revendication 3, caractérisé en ce que l'interrupteur (4) et/ou l'interrupteur de surveillance (7) et/ou le dispositif de blocage (6) sont disposés transversalement à l'axe longitudinal du poussoir (3).
  8. Dispositif de coupure de sécurité selon la revendication 4, caractérisé en ce que le dispositif de blocage (6) est raccordé dans la région, voisine du crochet (9), du levier de blocage (8).
  9. Dispositif de coupure de sécurité selon la revendication 4, caractérisé en ce que le dispositif de blocage est raccordé dans la partie d'extrémité du levier de blocage (8), tournée à l'opposé du crochet (9).
  10. Dispositif de coupure de sécurité selon la revendication 1, caractérisé en ce que l'interrupteur (4) est relié à la roue de commande par une manivelle (20).
  11. Dispositif de coupure de sécurité selon l'une des revendications 3 ou 7, caractérisé en ce que l'interrupteur de surveillance (7) et l'interrupteur (4) sont placés en relation superposée.
  12. Dispositif de coupure de sécurité selon la revendication 1, caractérisé en ce qu'il est prévu un axe à ressort (21) par lequel le levier de blocage (8) peut être pressé sur la roue de commande.
EP94119905A 1994-02-02 1994-12-16 Dispositif d'interrupteur de sécurité enfermé dans un boîtier Expired - Lifetime EP0666582B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4403061 1994-02-02
DE4403061A DE4403061C1 (de) 1994-02-02 1994-02-02 Durch ein Gehäuse umschlossene Sicherheitsschaltvorrichtung

Publications (2)

Publication Number Publication Date
EP0666582A1 EP0666582A1 (fr) 1995-08-09
EP0666582B1 true EP0666582B1 (fr) 1997-09-17

Family

ID=6509226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94119905A Expired - Lifetime EP0666582B1 (fr) 1994-02-02 1994-12-16 Dispositif d'interrupteur de sécurité enfermé dans un boîtier

Country Status (4)

Country Link
US (1) US5584378A (fr)
EP (1) EP0666582B1 (fr)
DE (1) DE4403061C1 (fr)
ES (1) ES2107110T3 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4328297C1 (de) * 1993-08-23 1995-02-23 Euchner & Co Sicherheitsschalter
FR2750791B1 (fr) * 1996-07-02 1998-10-09 Schneider Electric Sa Interrupteur de securite verrouillable par electroaimant
FR2751122B1 (fr) * 1996-07-09 1998-09-11 Schneider Electric Sa Interrupteur de securite a actionneur blocable
US6283514B1 (en) * 1996-08-16 2001-09-04 K. A. Schmersal Gmbh & Co. Apparatus for monitoring and controlling access to a restricted area
US6539760B1 (en) * 1999-05-24 2003-04-01 K.A. Schmersal Gmbh & Co. Monitoring device
US6944774B2 (en) 1999-06-18 2005-09-13 Zoom Telephonics, Inc. Data flow control unit
SE521570C2 (sv) * 1999-09-10 2003-11-11 Abb Ab Sätt och anordning vid förregling
JP3982143B2 (ja) * 2000-03-15 2007-09-26 オムロン株式会社 ロックスイッチ装置
US6515239B2 (en) 2001-02-23 2003-02-04 Gregory Brian Marchant Motivational apparatus for controlling use of electronic devices and method of use
CN1333317C (zh) * 2003-02-13 2007-08-22 神达电脑股份有限公司 保密装置
FR2862810B1 (fr) * 2003-11-21 2006-01-06 Schneider Electric Ind Sas Interrupteur de position de securite
TWI253369B (en) * 2005-01-14 2006-04-21 Univ Nat Taiwan A safety apparatus for preventing industrial safety problems of machine tools caused by device-loading gears
JP4673661B2 (ja) 2005-04-26 2011-04-20 Ｉｄｅｃ株式会社 安全スイッチ
EP1876622B1 (fr) * 2006-07-03 2010-09-29 Siemens Aktiengesellschaft interrupteur de position
US7429708B1 (en) * 2007-06-22 2008-09-30 Eja, Limited Safety switch
CN102881512B (zh) * 2012-09-24 2015-10-14 无锡市新一代电力电器有限公司 具有自由脱扣功能的手动快速合闸断路器机构
DE202020100575U1 (de) 2020-02-03 2021-05-05 Steute Technologies Gmbh & Co. Kg Sicherheitszuhaltung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3100862C2 (de) * 1981-01-14 1984-02-09 K.A. Schmersal Gmbh & Co, 5600 Wuppertal Sicherheitsschalter
DE3112097C2 (de) * 1981-03-27 1990-03-29 Euchner & Co, 7022 Leinfelden-Echterdingen "Sicherheitsschalter"
DE3309372A1 (de) * 1983-03-16 1984-09-27 Hans & Jos. Kronenberg Gmbh, 5060 Bergisch Gladbach Sicherheitsschalter
DE3330109C2 (de) * 1983-08-20 1986-01-02 K.A. Schmersal Gmbh & Co, 5600 Wuppertal Elektrischer Schalter
ATE39991T1 (de) * 1984-08-16 1989-01-15 Letzel Helmut Vorrichtung zur sicherheitsverriegelung bei schutzeinrichtungen zum verhindern des eingriffs in gefahrbringende raeume.
DE3430090A1 (de) * 1984-08-16 1986-03-06 Euchner & Co, 7022 Leinfelden-Echterdingen Sicherheitsschalter
FR2613121B1 (fr) * 1987-03-27 1993-12-10 Telemecanique Electrique Interrupteur a cle verrouillable par actionneur
EP0553885B2 (fr) * 1992-01-31 2003-12-17 Omron Corporation Interrupteur de sécurité

Also Published As

Publication number Publication date
EP0666582A1 (fr) 1995-08-09
ES2107110T3 (es) 1997-11-16
DE4403061C1 (de) 1995-06-22
US5584378A (en) 1996-12-17

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