EP0667632B1 - Dispositif de verrouillage de sécurité - Google Patents

Dispositif de verrouillage de sécurité Download PDF

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Publication number
EP0667632B1
EP0667632B1 EP95101391A EP95101391A EP0667632B1 EP 0667632 B1 EP0667632 B1 EP 0667632B1 EP 95101391 A EP95101391 A EP 95101391A EP 95101391 A EP95101391 A EP 95101391A EP 0667632 B1 EP0667632 B1 EP 0667632B1
Authority
EP
European Patent Office
Prior art keywords
safety
locking device
enclosure
handle
actuators
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
EP95101391A
Other languages
German (de)
English (en)
Other versions
EP0667632A1 (fr
Inventor
Klaus Schulze
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.)
KA Schmersal GmbH and Co KG
Original Assignee
KA Schmersal 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
Application filed by KA Schmersal GmbH and Co KG filed Critical KA Schmersal GmbH and Co KG
Publication of EP0667632A1 publication Critical patent/EP0667632A1/fr
Application granted granted Critical
Publication of EP0667632B1 publication Critical patent/EP0667632B1/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 invention relates to a safety locking device for protective parts movable with respect to stationary parts, comprising a safety switch with a housing accommodating an adjustable switching element, into which two actuators located on a common support can be inserted, one of which acts mechanically on the adjustable switching element and the other in the housing an electromagnet can be unlocked, the carrier being fastened to the protective cover and the housing to the fixed part or vice versa.
  • Such a safety locking device is known from DE-U-87 16 018.
  • the arrangement is such that a protective cover can only be opened when a certain operating state of the protected machine or system has ended, for example rotating parts that continue to rotate for a while after the machine has been switched off come to a standstill during processing are.
  • With light protective covers for example in the form of doors or the like. Under certain circumstances, warping materials such as sheet metal or plexiglass often cause twisting, which means that a safety switch provided is not always closed when the protective cover is closed, so that a separate pressing of the protective cover in the area of the safety switch is necessary. If, as usual, there are several protective covers at the same time on a system or machine protective housing, the safety switches of the individual protective covers then being connected in series, then all protective covers must be checked and, if necessary, pressed on.
  • the object of the invention is to provide a security locking device of the type mentioned, in which Closing a protective cover automatically activates an associated safety switch.
  • the carrier is a handle bar of a locking handle which is rotatably arranged on the protective cover or on the fixed part, the actuators being pivoted about axes parallel to the axis of rotation of the locking handle by a predetermined angle relative to the handle bar.
  • the safety locking device shown comprises a manually operated locking handle 1, which is rotatable by an angle of approximately 90 ° adjacent to an edge 2 'of a protective cover 2, which in turn can be pivoted or removed in relation to a fixed part 3, for example a protective housing, for opening an access, is attached.
  • the locking handle 1 comprises a handle part 4 on the outside of the protective cover 2 and a handle bar 5 on the inside of the protective cover 2.
  • the handle bar 5 is at the free end to the outside expediently provided with a wedge surface 6 so as to facilitate the closing of a possibly distorted protective cover 2 with respect to the fixed part 3.
  • the handle bar 5 carries a carrier plate 7 for receiving two different actuators 8, 9 arranged next to one another for a safety switch 10, which in turn is fastened to the fixed part 3 adjacent to an edge 3 'thereof.
  • the safety switch 10 comprises a housing consisting of two housing parts 11, 12.
  • an actuating element 13 is arranged in the housing part 11, for example in the form of a rotatable roller, which serves to move a plunger 14 which carries a contact bridge 15, which can be brought into or out of engagement with switching contacts 16 fixed to the housing, depending on the desired switching operation is.
  • the switch contacts 16 are connected to terminals 17 which are wired to leads, not shown.
  • the housing part 11 has a total of four slot-shaped inlet openings 18, which extend into the housing part 11 from three sides.
  • the front and rear inlet openings 18 form a continuous slot, into which the two slot-shaped front openings 18 parallel to this also open.
  • the actuating element 13 is arranged in the area of the inlet openings 18 in such a way that it is rotated by inserting or withdrawing an actuator 8 into or out of an inlet opening 18, as a result of which the contact bridge 15 is adjusted relative to the switching contacts 16 for switching on and off.
  • the actuator 8 is a double U-bracket which has extensions 20 carrying wedge surfaces 19 on each U-bracket.
  • a continuous intermediate wall 21 is then provided in the central area, extending approximately from the front entry opening 18 to the rear entry opening 18 and in this way also forms an intermediate wall for the front entry opening 18, so that the safety switch 10 only with the actuator 8 in the form of a double -U-bracket is actuated. (Such a safety switching element is known from DE-GM 87 04 801.)
  • the two housing parts 11, 12 are connected to one another via a bushing 22 for connecting wires (not shown), the housing part 12 connecting terminals 23, which are used for wiring and which are supplied with electrical leads via one of a plurality of openings 24, which are closed when not in use .
  • the housing part 12 receives an electromagnet 25 which is coupled to a two-armed lever 26 which is pivotally mounted in the housing part 12 about an axis 27.
  • the free end of the lever 26 carries a contact bridge 28 for contacting two contacts 29 with the electromagnet 25 in a corresponding position.
  • a locking pin 30 is provided in the housing part 12, on which the lever arm extending to the free end of the lever 26 engages.
  • the locking pin 30 is provided with a circumferential groove in which two projections 31 of the lever arm, which extend inwards into a recess of this lever arm and which extend through the recess, engage.
  • the housing part 12 there is also a wall 32 through which the locking pin 30 extends and which forms with a holder 33 a receiving space for a biasing spring 34 which is supported on the one hand on the holder 33 and on the other hand on a ring 30 'of the locking pin 30 , so that the latter is biased accordingly.
  • the locking pin 30 can be moved against the spring preload by actuating the lever 26 via the electromagnet 25.
  • the housing part 12 has three inlet openings 35, one of which is provided on the front, one on the front and one on the rear, the front and rear inlet openings 35 forming a through-channel which is crossed by the front-side inlet opening 35.
  • the locking pin 30 is guided with one end in a bore which opens into the common inner wall of the three inlet openings 35, so that the locking pin 30 projects into the inlet openings 35 as a result of the spring preload, namely for all inlet openings 35 in the same position, so that the actuator 9, which has a corresponding recess 36, is locked by the locking pin 30 in the inserted state, regardless of which of the access openings 35 of the actuator 9 has been inserted.
  • the Actuator 9 has a rounded free end, so that when the actuator 9 is inserted, the locking pin 30 is pressed back against its spring preload until it can fall into the recess 36.
  • the electromagnet 25 can be controlled, for example, by a speed monitor, which monitors the complete standstill, for example, of a machine accessible via the protective cover 2, or by a timer or the like, so that the protective cover 2 does not end before the end of a certain operating state, for example not before the complete standstill of a protected machine can be opened. Only when the latter has been reached does the electromagnet 25 attract and pulls the locking pin 30 out of the recess 36 in the actuator 9 against the spring bias via the lever 26.
  • the locking pin 30 can be arranged in a rotationally secured manner on a holder 38 which can be rotated with the key and has a cam surface 39. If the holder 38 is rotated, the cam surface 39 brings about an axial adjustment of the locking pin 30.
  • the actuators 8, 9 are pivoted about axes 40 parallel to the axis of rotation of the locking handle 1 by a predetermined angle relative to the handle bar 5, so that they can easily enter the inlet openings 18, 35 despite the relatively small pivoting radius.
  • the actuators 8, 9 can additionally be biased by means of a corresponding spring (not shown) held by the carrier plate 7 into a position pivoted against the carrier plate 7 to the axis of rotation of the locking handle 1.
  • the actuator 8 can also be rotated through 90 ° with respect to the exemplary embodiment shown, in which case it is then to be arranged pivotably in the axial plane of the axis 40.
  • the carrier plate 7 can expediently also be fastened to the side of the handle bar 5 facing away from the exemplary embodiment shown, so that the arrangement is suitable for right and left stop of the protective cover 2.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Claims (5)

  1. Dispositif de verrouillage de sécurité, pour des couvercles de protection (2) mobiles par rapport à des pièces fixes (3), comportant un commutateur de sécurité (10), avec un carter (11, 12), pouvant recevoir un organe de commutation réglable (15), carter dans lequel peuvent être insérés deux actionneurs (8, 9) se trouvant sur un support commun, actionneurs dont l'un agit mécaniquement sur l'organe de commutation réglable (15), et l'autre peut, dans le carter (11, 12), être déverrouillé par l'intermédiaire d'un électro-aimant (25), où le support est fixé au couvercle de protection (2) et le carter (11, 12) est fixé à la pièce fixe (3), ou inversement, caractérisé en ce que le support est un verrou à poignée (5), appartenant à une poignée de verrouillage (1), rapportée en rotation sur le couvercle de protection (2) ou sur la pièce fixe (3), les actionneurs (8, 9) étant logés de façon à pouvoir pivoter d'un certain angle prédéfini, par rapport au verrou à poignée (5), par rapport à des axes parallèles à l'axe de rotation de la poignée de verrouillage (1).
  2. Dispositif de verrouillage de sécurité selon la revendication 1, caractérisé en ce que les actionneurs (8, 9) sont maintenus contre le verrou à poignée (5) par l'intermédiaire d'une plaque support (7), à laquelle ils sont articulés, en deux positions décalées de 180° l'une par rapport à l'autre.
  3. Dispositif de verrouillage de sécurité selon la revendication 1 ou 2, caractérisé en ce que le verrou à poignée (5) a la forme d'un coin.
  4. Dispositif de verrouillage de sécurité selon les revendications 1 à 3, caractérisé en ce que le carter (11, 12) est réalisé en deux parties, et chaque partie du carter comporte un orifice d'entrée (18, 35) pour un actionneur (8, 9).
  5. Dispositif de verrouillage de sécurité selon l'une des revendications 1 à 4, caractérisé en ce que le carter (11, 12) est, sur trois côtés voisins, pourvu d'orifices d'entrée (18, 35) pour les actionneurs (8, 9).
EP95101391A 1994-02-12 1995-02-02 Dispositif de verrouillage de sécurité Expired - Lifetime EP0667632B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4404592 1994-02-12
DE4404592A DE4404592C1 (de) 1994-02-12 1994-02-12 Sicherheitsverriegelungseinrichtung

Publications (2)

Publication Number Publication Date
EP0667632A1 EP0667632A1 (fr) 1995-08-16
EP0667632B1 true EP0667632B1 (fr) 1997-08-06

Family

ID=6510165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95101391A Expired - Lifetime EP0667632B1 (fr) 1994-02-12 1995-02-02 Dispositif de verrouillage de sécurité

Country Status (2)

Country Link
EP (1) EP0667632B1 (fr)
DE (2) DE4404592C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10307043A1 (de) * 2003-02-20 2004-09-09 K.A. Schmersal Gmbh & Co Sicherheitsverriegelung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10123942B4 (de) * 2001-05-17 2007-12-20 Elan Schaltelemente Gmbh & Co. Kg Überwachungseinrichtung
DE10305704B3 (de) * 2003-02-12 2004-06-24 K.A. Schmersal Gmbh & Co Sicherheitszuhaltung
DE102009053717B4 (de) * 2009-11-18 2016-05-04 K.A. Schmersal Holding Gmbh & Co. Kg Anordnung mit einem Sicherheitsschalter oder einer Sicherheitszuhaltung und einem mechanischen Betätiger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8514140U1 (de) * 1985-05-11 1985-06-27 Hans & Jos. Kronenberg Gmbh, 5060 Bergisch Gladbach Sicherheitsschalter mit Fehlschließsicherung
DE8704801U1 (de) * 1987-03-31 1987-06-25 K.A. Schmersal Gmbh & Co, 5600 Wuppertal Sicherheitsschalter
DE8716018U1 (de) * 1987-12-04 1988-02-11 K.A. Schmersal Gmbh & Co, 5600 Wuppertal Sicherheitsschalter für Schutzabdeckungen od. dgl.
DE8807682U1 (de) * 1988-06-14 1988-08-18 K.A. Schmersal Gmbh & Co, 5600 Wuppertal Radiusbetätiger für einen Sicherheitsschalter
FR2653929B1 (fr) * 1989-10-27 1992-01-03 Telemecanique Mobile d'actionnement a cle pour interrupteur de securite.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10307043A1 (de) * 2003-02-20 2004-09-09 K.A. Schmersal Gmbh & Co Sicherheitsverriegelung
DE10307043B4 (de) * 2003-02-20 2005-03-31 K.A. Schmersal Gmbh & Co Sicherheitsverriegelung

Also Published As

Publication number Publication date
DE59500450D1 (de) 1997-09-11
DE4404592C1 (de) 1995-05-04
EP0667632A1 (fr) 1995-08-16

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