EP2047494B1 - Dispositif de commutation de securité pour le verrouillage d'un dispositif de protection - Google Patents

Dispositif de commutation de securité pour le verrouillage d'un dispositif de protection Download PDF

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Publication number
EP2047494B1
EP2047494B1 EP07786406.4A EP07786406A EP2047494B1 EP 2047494 B1 EP2047494 B1 EP 2047494B1 EP 07786406 A EP07786406 A EP 07786406A EP 2047494 B1 EP2047494 B1 EP 2047494B1
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EP
European Patent Office
Prior art keywords
bolt
switching device
locking
locking pin
accordance
Prior art date
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Active
Application number
EP07786406.4A
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German (de)
English (en)
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EP2047494A1 (fr
Inventor
Frank Bruchschmidt
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.)
Eaton Electrical IP GmbH and Co KG
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Eaton Electrical IP GmbH and Co KG
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Publication of EP2047494A1 publication Critical patent/EP2047494A1/fr
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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
    • 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 switching device for locking a protective device, such as a protective door of a motor or an industrial robot or drgl.
  • a particular problem with safety switching devices occurs when particularly high, acting on the operating bar tensile forces occur that lead to the destruction of the lock, whereby the protection device is disabled. Which may mean that with the drive head disengaged, removed or destroyed (by shearing off or even disassembling the drive head), it is possible for the safety switching device to change to a normally safe switching state, i. The contact is switched as if the protective device (protective door) was closed and locked. This means that the protected system (motor or machine) can be operated with the safety guard open.
  • a safety switching device for locking a protective device is in the document DE 31 12 097 A1 shown in which a plunger protrudes when inserted actuator in a window-like recess of the actuating element.
  • a pivotable by the actuating element between a first and a second position locking disc is provided, which has a slot-like opening with different widths at the end, through which the plunger end can pass through depending on the pivot position in the recess of the actuating element.
  • a key switch is known ( DE 10 2005 050 313 A1 ) with an operable by a bolt-like, a window having key control disk.
  • the control disk has an interior in which engages one end of a locking bolt. In the inserted position of the key, the locking pin end does not reach into the window of the key.
  • a safety switching device for the locking of a protective device comprising a housing, a housing formed in the lock shaft for the insertion of an actuating element for the switching device, and wherein the actuating element of a windowed latch consists and the window is closed in the direction of actuation of lying with a cross bar, one of a feed in locking position and back in the release position perpendicular to the direction of the locking bar longitudinally movable locking pin and a full insertion of the bolt to an activation (by means of energized holding magnet) of the feed of the locking pin comes and in the Einorganizeddlage of the bolt, the locking pin end enters the window and the withdrawal of the bolt locks, and upon deactivation of the feed (holding magnet is de-energized) the locking pin end leaves the window.
  • a comparable facility is in the DE 4328297 C1 described.
  • the essence of the invention is the special use and the design of the control disk. This is actuated by the bolt and is pivotable about a perpendicular to the actuating direction of the bolt and senkecht arranged for movement of the locking pin axis between a first (release) and a second position (locking).
  • the control disk has an interior in which the locking pin end ends.
  • the control disk has a cut formed on the circumference, the position in relation to the locking shaft is such that the crosspiece of the bolt engages in the recess and it comes with a complete insertion of the bolt to a rotation in the second position (locking) of the control disk and in the insertion end position of the bolt and upon activation of the advance of the locking bolt ("locking the locking means") the locking pin end enters the window and locks the pulling out of the bolt, or when deactivating the feed, the locking bolt end leaves the window. Regardless of the position occupied by the control disk, the locking pin end is located in the interior of the control disk.
  • the special design of the device prevents the pulling out of the bolt even with extreme traction.
  • the bolt is blocked by the locking pin located in the control disk, preferably made of steel.
  • the switching device is also secured with acting on the bolt tensile forces of up to 2400 N, which corresponds to an exceeding of about 30% of the regulation DIN EN 1088 or DIN EN 954.
  • a pin is guided through an opening in the control disk, which is adjacent in position to the locking pin end on the side of the insertion shaft.
  • the pin is tight - approximately at the height of the axis of rotation of the control disc - passed the locking pin.
  • the locking pin is in the locked position. In this situation, pulling the bolt loads the locking bolt in bending.
  • the pin is an additional abutment that intercepts the bending load of the locking pin.
  • control disk locking grooves may be present, which cooperate with spring-loaded detent pin in the two end positions of the control disk, and thus produce an increased, but surmountable resistance to the actuation of the control disk when pulling or inserting the bolt.
  • a stop is formed, on which the locking pin is held in activated feed in abutment.
  • the feed (locking of the locking pin) can be applied by the force of a tensioned spring or by an electromagnet.
  • the relaxed spring is tensioned by a current-supplied electromagnet.
  • the release of the lock is generated by the energization of the electromagnet.
  • the electromagnet is energized to activate the feed (so-called working current principle) and the feed is deactivated by switching off the energization.
  • the release of the lock is generated by the force of the electromagnet in the home position moving return spring when de-energized electromagnet.
  • the invention can be used independently of the locking principle used.
  • the working current principle in which an electromagnet in the energized state, the locking pin moves to a first position, wherein the locking pin protrudes into the locking shaft and locks the bolt mechanically.
  • the lock When de-energized electromagnet, the lock is passivated, wherein the locking pin moves out of the locking shaft and thereby releases the latch by the force of a return spring moves the locking pin against the locking direction to a second position.
  • the bolt takes during his door movement with the control disk. The bolt is guided in the recess of the control disk. The locking pin then remains inevitably in its release or unlocking position.
  • the device further comprises a housing in which mechanical switching contacts, for example, pairs or individual contacts of openers and / or closers can be arranged. Accordingly, an indication and / or monitoring of the switching and operating state of the switching device (open, closed, locked, malfunction) can take place via the contacts.
  • a longitudinally displaceable dome tappet be mounted for direct mechanical actuation of the switch contacts, wherein the dome ram of the tumbler of the locking pin, a return spring and a drive head located in the mechanical control disc is movable in two end positions, wherein the drive head, locking pin and contact apparatus arranged one behind the other in the axial direction are.
  • further monitoring functions may be present, for example in such a way that the feed of the locking bolt is released only after a presettable delay time in order to release the switching device.
  • a presettable delay time in order to release the switching device.
  • the housing of the switching device may be formed of a rigid housing body and a rotatably formed on the housing body drive head.
  • the control disk together with their storage and locking means (see below) housed.
  • the drive head is rotatably mounted against the basic housing coaxial with the locking pin (preferably by 360 °).
  • the device can be used in many ways, because the drive head can be positioned in four rotated by 90 ° positions.
  • the rotatable mounting of the drive head can be additionally secured with non-removable pins against removal.
  • the pins can be made of metal or plastic, and are driven firmly into the housing body, so that the drive head is anchored. This safety measure prevents the removal of the drive head after loosening the (four) screws to change the approach direction, whereby the device is a manipulation possibility is prevented, which would otherwise be present with removable drive head.
  • the safety switching device is arranged primarily on a solid body (for example, on a post, box, or grid, or on a wall) of a system, with plant usually a protected area or a sensitive machine (eg a robot) is to be understood ;
  • the actuating element of the safety switching device is arranged on an additional element of the system, wherein the additional element is a movable part, usually a protective door leading to the plant.
  • a device in the drive head, a device may be provided which cooperates with arranged at the front end of the bolt insertion bevels, whereby a release or blocking of the insertion of the bolt takes place.
  • the locking device is used to protect against manipulation or misuse of an inadmissible bolt.
  • Such locking devices are known, for example, those in DE 4238016 A1 is described.
  • the Fig. 1 shows a section through the arranged at the upper end of the housing 105 of the device according to the invention drive head 110 in the position of the captured latch 32.
  • the actuating latch is for example attached to a protective door (or other locking device) of a motor or an industrial robot.
  • the bolt 32 is inserted to the right, the control disk 10 is in the rotated to the right end position.
  • the bolt end 21 is in its extreme extended position in the cavity 14 of the control disk.
  • the removal of the bolt 32 is not possible through the window 36 located, preferably made of steel locking pin 20, because of its excellent stability.
  • the locking pin is a locking force (solenoid) and a restoring force (spring) to the hub W (see Fig. 2 ) emotional.
  • the locking pin may be formed as an elongated design of the armature of an electromagnet.
  • the first - in Fig. 1 shown position predominates the locking force of the restoring force (solenoid energized) and the bolt 20 has moved into the locked position.
  • the locking pin 20 has penetrated into the plane of the insertion shaft 30 and extends with its end 21 in a window 36 of the bolt 32.
  • the bolt 32 is no longer extend out of the drive head 110.
  • a restoring force conveys the bolt to a retracted position (solenoid de-energized).
  • control disk 10 is also recognizable, which further in Figs. 5A and 5B will be described.
  • a cavity 14 is formed, in which the locking pin comes to rest in both end positions.
  • the bolt In Fig. 1 the bolt is in the locked position; the locking pin protrudes into the window 36 of the bolt and the crosspiece 34 (see Fig. 5 ) of the bolt abuts against the locking pin.
  • the Fig. 2 shows (again in section) the unlocking state of the device.
  • the restoring force comes into play and moves the locking pin 20 against the locking direction.
  • the bolt end 21 moves out of the window 36 of the bolt and releases it.
  • the system is now in a safe state with the door closed.
  • a pin 50 is guided through an opening (groove 18) in the control disk, which is in its position adjacent the locking pin end 21 on the side of the insertion shaft 30 (see Fig. 1 to 3 ).
  • the pin passes close to the locking pin so that the locking pin slides along the pin. If the bolt is pulled in locking position of the locking pin, although the locking pin is loaded on bending, but the pin is an abutment that intercepts the load on the locking pin.
  • Fig. 2 the bolt end 21 is retracted, the bolt 32 is still inserted and the control disk 10 is rotated to the right.
  • the bolt 32 can now slide over the bolt end and be moved out (to the left); In this case, the transverse web 34 comes against the edge 13 "of the control disk 10 and there is a left-hand rotation of the control disk ..
  • the swivel angle in the embodiment is about 90 ° Fig. 3 shown position.
  • a (possible) movement in the locked position of the retracted locking bolt is prevented by the locking edge 16 (on the control disk), since the locking edge 16 is seated in front of the shoulder 22 formed on the bolt end 21.
  • an encoded barrier is used in the described arrangement, as for example in the DE 4238016 A1 is shown.
  • two locking carriages 90 (FIG. Fig. 4 ), which prevent a movement of the control disk as a barrier.
  • the locking slides 90 are actuated by ramps 33 'formed on the latch, which act as coding elements.
  • the locking slides slide with spring force actuation behind the locking edge 13 "'of the control disk 10 and can only be moved to the side by pushing the bolt in. Snaping behind the locking edge 13"' inevitably produces a mechanical reclosing lock.
  • the introduction of a bolt without proper coding is limited. With a bar without coding or with a mis-coded bar, the lock is not actuated.
  • the control disk is in the in Fig. 3 shown locked position in the drive head.
  • the front edge of the crossbar 34 meets the edge 13 'in the incision and moves the control disc (clockwise according to FIG) in the second position.
  • the electromagnet When the electromagnet is energized, the locking force applied by the electromagnet moves the bolt into the locking position.
  • Fig. 4 is the cut in one opposite the FIGS. 1 to 3 rotated through 90 ° by the housing 105 of a device and arranged on the housing drive head 110.
  • the drive head is rotatably mounted on the base housing. Recognizable is in the axes 11 'mounted control disc 10.
  • At this locking grooves 19 are present (see also Fig. 5A ), which cooperate with acted upon by springs 82 locking pin 80 in the two end positions of the control disk and produce noticeable locking positions. It is thus achieved that an increased, but surmountable resistance to the operation of the control disk is present, which complicates the pulling or insertion of the bolt.
  • the control disc is still under bias with an unlocked, but closed guard door, so that the protective door does not jump open immediately even with small forces.
  • the bearing of the drive head is secured against removal with non-removable pins 108.
  • the pins are driven firmly into the housing body, so that the drive head is anchored.
  • FIGS. 5A, 5B and 5C show the control disc in perspective and in section.
  • the control disk is rotatably mounted axially in the bearings 11 (see also Fig. 4 ).
  • the axis 11 'intersects the longitudinal axis of the locking pin at right angles.
  • On the circumference of the control disk an actuating cut 12 is formed for the bolt.
  • the crossbar 34 of the bolt comes into contact with the inner edge 13 'in the recess of the control disk.
  • To pull the bolt (control disk in position right according to Fig. 2 ) abuts the cross bar 34 of the bolt of the inner edge 13 "in the operating recess 12.
  • a locking edge 13 "' which has already been mentioned, which cooperates with the lock present in the drive head 110 of the device according to the invention limited to the disk carrying the bearing 11 for the axis of rotation, into which the bolt protrudes (in each of its end positions) .
  • the stroke of the bolt is indicated by W in Fig. 2 located.
  • the size W of the lifting movement corresponds approximately to the height of Riegelein Industriesschachts.
  • the cavity 14 is open up to the operating recess 12.
  • the Fig. 6 shows a flat-plate element on a mounting flange 33 "formed, double-tongued latch 32.
  • the tongues 33 At the front ends of the tongues 33 bevels 33 'formed.
  • the tongues 33 and a transverse web 34 surround a window 36, in which the locking pin engages in the locking position that the bevels 33 'of the present embodiment are formed on the outside of the tongues, whereas the bevels in the prior art (FIG. DE 4238016 A1 ) are formed on the inside of the tongues.
  • the formation of the slopes corresponds to the formation of the locking heads (locking slide).
  • the locking slides are linearly movable in grooves against each other and engage locking edges or locking grooves of a locking or control means, in the present embodiment, the bevels 33 'move away the locking slide from each other during insertion of the bolt and move the spring heads when removed to move towards each other.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Claims (12)

  1. Dispositif de commutation de sécurité pour le verrouillage d'un dispositif de protection, comprenant :
    - un boîtier (105),
    - un logement de verrou (30) ménagé dans le boîtier (105) pour l'insertion d'un élément d'actionnement pour le dispositif de commutation,
    - et l'élément d'actionnement se composant d'un verrou (32) doté d'une fenêtre (36) et la fenêtre (36) dans la direction d'actionnement étant fermée par une bride transversale (34),
    - un boulon de blocage (20) mobile en direction longitudinale et perpendiculaire à la direction d'actionnement du verrou (32) en position bloquée par une avance et en position libérée par rétraction,
    - un disque de commande (10) pouvant être pivoté entre une première position et une deuxième position actionnable par le verrou (32) et disposé autour d'un axe rotatif (11) perpendiculaire à la direction d'actionnement du verrou et perpendiculaire au mouvement du boulon de blocage (20),
    - le disque de commande (10) disposant d'un intérieur (14) dans lequel se situe l'extrémité du boulon de blocage (21), et
    - le disque de commande (10) disposant d'une fente (12) située au niveau de la circonférence, dont la position par rapport au logement de verrou (30) est telle que la bride transversale (34) du verrou (32) s'engage dans la fente (12) et que l'insertion complète du verrou (32) entraîne une rotation dans la deuxième position du disque de commande (10) et dans la position de fin d'insertion du verrou (32) et lors de l'activation de l'avance du boulon de blocage (20), l'extrémité du boulon de blocage (21) est insérée dans la fenêtre (36) bloquant la sortie du verrou et lors de la désactivation de l'avance, l'extrémité du boulon de blocage (21) sort de la fenêtre.
  2. Dispositif de commutation de sécurité selon la revendication 1, caractérisé par le fait qu'une goupille (50) située de manière parallèle à l'axe rotatif (11) du disque de commande (10) via une coupure (18) est insérée dans le disque de commande (10) et que la goupille est positionnée à côté de l'extrémité du boulon de blocage (20) sur les côtés de la gaine d'insertion (30).
  3. Dispositif de commutation de sécurité selon les revendications 1 et 2, caractérisé par le fait que l'intérieur (14) du disque de commande (10) est doté d'une butée (15) maintenant en appui le boulon de blocage (21) lorsque l'avance est activée.
  4. Dispositif de commutation de sécurité selon l'une des revendications précédentes, caractérisé par le fait que le disque de commande (10) est doté de rainures encoches (19) qui en agissant avec des boulons d'arrêt (80) soumis à l'action d'un ressort dans les deux positions de fin de course du disque de commande créent une résistance surmontable.
  5. Dispositif de commutation de sécurité selon l'une des revendications précédentes, caractérisé par le fait que l'avance s'effectue à l'aide de la puissance exercée par le ressort tendu et que le ressort détendu est tendu par un électroaimant excité.
  6. Dispositif de commutation de sécurité selon l'une des revendications 1 à 3, caractérisé par le fait que l'avance est effectuée à l'aide d'un électroaimant qui est excité pour l'activation et que l'avance est désactivée en arrêtant l'excitation.
  7. Dispositif de commutation de sécurité selon l'une des revendications précédentes, caractérisé par le fait que des contacts de commutation sont actionnés grâce au mouvement du boulon de blocage (20) en position de verrouillage (RS) et en position de libération (FS) et que ces contacts sont utilisés pour afficher et/ou surveiller la fonction opératoire du dispositif de commutation.
  8. Dispositif de commutation de sécurité selon d'une des revendications précédentes, caractérisé par le fait que pour libération du dispositif de commutation, l'avance du boulon de blocage (20) n'est rétractée qu'après un délai pré-réglable.
  9. Dispositif de commutation de sécurité selon d'une des revendications précédentes, caractérisé par le fait que le boîtier (105) est composé d'un corps de boîtier rigide et d'une tête d'entraînement (110) rotative montée sur le corps de boîtier, la tête d'entraînement hébergeant le disque de commande (10) avec l'ensemble de son roulement et que la tête d'entraînement est montée de manière rotative contre le boîtier de base et de manière coaxiale au boulon de blocage (20).
  10. Dispositif de commutation de sécurité selon la revendication précédente, caractérisé par le fait que la fixation de la tête d'entraînement (110) dans le corps de boîtier s'effectue l'aide des goupilles (108) protégées contre le retrait.
  11. Dispositif de commutation de sécurité selon d'une des revendications précédentes, caractérisé par le fait que le dispositif de commutation peut être disposé sur un corps de base rigide d'un système et que l'élément d'actionnement (32) peut être disposé sur un élément complémentaire du système.
  12. Dispositif de commutation de sécurité selon la revendication 1, caractérisé par le fait que la tête d'entraînement (110) héberge un dispositif qui agit avec des chanfreins d'introduction (33, 33) montés au niveau de la fin de course avant du verrou (32) libérant ou bloquant l'insertion du verrou.
EP07786406.4A 2006-08-04 2007-07-28 Dispositif de commutation de securité pour le verrouillage d'un dispositif de protection Active EP2047494B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610036514 DE102006036514B3 (de) 2006-08-04 2006-08-04 Sicherheitsschalteinrichtung für die Verriegelung einer Schutzeinrichtung
PCT/EP2007/006696 WO2008014946A1 (fr) 2006-08-04 2007-07-28 Dispositif de commutation de sécurité pour le verrouillage d'un dispositif de protection

Publications (2)

Publication Number Publication Date
EP2047494A1 EP2047494A1 (fr) 2009-04-15
EP2047494B1 true EP2047494B1 (fr) 2014-04-02

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EP07786406.4A Active EP2047494B1 (fr) 2006-08-04 2007-07-28 Dispositif de commutation de securité pour le verrouillage d'un dispositif de protection

Country Status (4)

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EP (1) EP2047494B1 (fr)
DE (1) DE102006036514B3 (fr)
ES (1) ES2476245T3 (fr)
WO (1) WO2008014946A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900011697A1 (it) * 2019-07-12 2021-01-12 Pizzato Elettrica Srl Interruttore di sicurezza con pulsantiera

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112097C2 (de) * 1981-03-27 1990-03-29 Euchner & Co, 7022 Leinfelden-Echterdingen "Sicherheitsschalter"
DE3430090A1 (de) * 1984-08-16 1986-03-06 Euchner & Co, 7022 Leinfelden-Echterdingen Sicherheitsschalter
EP0553885B2 (fr) * 1992-01-31 2003-12-17 Omron Corporation Interrupteur de sécurité
DE9212093U1 (de) * 1992-09-08 1994-01-13 Kloeckner Moeller Gmbh Vorrichtung und Anordnung für eine Sicherheitstürverriegelung und eine mit dieser zwangsverbundenen Türstellungsüberwachung
DE4328297C1 (de) * 1993-08-23 1995-02-23 Euchner & Co Sicherheitsschalter
DE29803028U1 (de) * 1998-02-20 1998-04-09 Bernstein Hans Spezialfabrik Sicherheitsschalter
DE10106228A1 (de) * 2001-02-10 2002-09-19 Euchner Gmbh & Co Sicherheitsschalter mit Entriegelungsscheibe
JP4396478B2 (ja) * 2004-10-21 2010-01-13 オムロン株式会社 キースイッチ

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DE102006036514B3 (de) 2008-01-10
EP2047494A1 (fr) 2009-04-15
WO2008014946A1 (fr) 2008-02-07
ES2476245T3 (es) 2014-07-14

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