EP0609672A2 - Safety switch - Google Patents

Safety switch Download PDF

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Publication number
EP0609672A2
EP0609672A2 EP94100405A EP94100405A EP0609672A2 EP 0609672 A2 EP0609672 A2 EP 0609672A2 EP 94100405 A EP94100405 A EP 94100405A EP 94100405 A EP94100405 A EP 94100405A EP 0609672 A2 EP0609672 A2 EP 0609672A2
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EP
European Patent Office
Prior art keywords
safety switch
housing
disks
roller
switch according
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.)
Granted
Application number
EP94100405A
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German (de)
French (fr)
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EP0609672B1 (en
EP0609672A3 (en
Inventor
Alan Richard Cooper
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KA Schmersal GmbH and Co KG
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KA Schmersal GmbH and Co KG
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Publication of EP0609672A2 publication Critical patent/EP0609672A2/en
Publication of EP0609672A3 publication Critical patent/EP0609672A3/en
Application granted granted Critical
Publication of EP0609672B1 publication Critical patent/EP0609672B1/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00Switches 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
    • H01H27/002Switches 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00Switches 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
    • H01H27/002Switches 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
    • H01H2027/005Switches 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 safety switch with a housing, which has at least one housing opening for inserting an actuating member and in which a roller for actuating a contact carrier movable in the housing is rotatably arranged, the roller being locked against rotation and being unlockable and rotatable by inserting the actuating member .
  • Such a safety switch with a separate actuator is known for example from DE-C-3 100 862, 3 330 109 and 3 433 048.
  • This can be attached directly to a protective device, such as a protective door or a machine, with little effort and without additional mechanical components.
  • the actuator can also be designed so complicated that it cannot be copied with simple means, so that it is not possible to outsmart the safety switch with everyday objects (screwdrivers, bottle openers, etc.) or simply bent tools (paper clips).
  • the actuators supplied by the switch manufacturer are all identical, so that you can operate the switch, for example, with a replacement actuator despite the protective door being open.
  • the object of the invention is to provide a safety switch of the type mentioned, which is individually mechanically coded without great effort.
  • the roller comprises a plurality of disks which are rotatable independently of one another about an axis, all of which are provided with a control-curve-like recess through which a pin running parallel to the axis and connected to the contact carrier is guided, the disks being different which have at least one housing opening facing radial recesses for engagement with corresponding actuating sections of the actuating mechanism.
  • Fig. 1 shows a perspective and detail of a safety switch with its actuator.
  • FIG. 2 shows a detail of a longitudinal section through the safety switch from FIG. 1.
  • FIG. 3 shows a section of the safety switch from FIG. 1 rotated by 90 ° with respect to FIG. 2.
  • the safety switch shown comprises a housing 1, which is divided into a contact chamber 3, a sealing chamber 4 and a roller chamber 5 by partitions 2.
  • Fixed contact contacts 6 are arranged in the contact chamber 3, while a contact carrier 9 comprising a plunger 7 and a contact bridge 8 projects into the contact chamber 3.
  • the plunger 7 is guided straight through openings in the intermediate walls 2 and is supported by a spring 10 supported in the housing 1 biased into its starting position.
  • the contact bridge 8 is displaceable relative to the plunger 7 in the axial direction thereof by a predetermined stroke against a spring preload 11.
  • a sealing bellows 12, which is fastened to a guide extension 13 of the intermediate wall 2 separating the contact chamber 3 and the sealing chamber 4, is also fastened to the tappet 7, so that the contact chamber 3 is secured against the ingress of moisture.
  • the plunger 7 carries at its end projecting into the roller chamber 5 a bracket-like holder 14 for a pin 15 extending transversely to the longitudinal axis of the plunger 7.
  • the pin 15 is at both ends in a guide 16 extending in the direction of movement of the plunger 7 inside the Housing 1 out.
  • the bracket-like holder 14 can be guided on the inside of the housing 1.
  • an axis 17 is arranged parallel to the longitudinal direction of the pin 15, on which a row of disks 18 is rotatably arranged independently of one another.
  • Each disk 18 is provided with a control curve-like recess 18 for the pin 15, the control curve-like recesses 19 expediently each having two cam branches which bring about a stroke of the contact carrier 9 and are arranged symmetrically to one another, so that sufficient rotation of the disks 18 forming a roller both in the causes a corresponding stroke of the contact carrier 9 for actuating the safety switch, as in the other direction of rotation.
  • a shape of the recesses 19 in the form of a very flat "3" or a steep, curved "V" expedient.
  • the pin 15 is located in the middle of the symmetrical recesses 19.
  • the disks 18 are each provided with a radial recess 20.
  • the radial recesses 20 are in the direction of the axis 16 and on a preferably slot-like housing opening 21 aligned, wherein an actuator 22 can be inserted through the housing opening 21.
  • each disk 18 has two radial recesses 20 arranged circumferentially offset from one another by 90 °.
  • the roller is formed here from a combination of disks 18 from a certain number of disk types with differently shaped radial recesses 20 and, optionally, disk thicknesses.
  • the radial recesses 20 interact when the actuator 22 is inserted with corresponding actuating sections 23 of the actuating mechanism 22 (wider radial recesses 20 with correspondingly wide actuating sections 23, narrower with correspondingly narrow actuating sections 23), so that the disks 18 are rotated overall in accordance with the direction of insertion of the actuating member 22 and thus the contact carrier 9 is moved to actuate the safety switch.
  • This type of individual coding of the safety switch means that the size as well as the construction and assembly effort are practically not affected and the previous advantages such as actuation from several directions can be retained.
  • the disks 18 can be arranged at a distance from one another on the axis 17. They can be arranged axially displaceably on the axis 17 as a whole package. It is then expedient to provide wedge surfaces 24 protruding laterally on the actuating member 22, which shift the switching disk pack into the correct position, so that the actuating sections 23 subsequently meet the corresponding radial recesses 20. As a result, the lateral tolerance for the insertion of the actuating member 22 can be increased considerably.
  • the disks 18 can also be divided into two or more groups which are separated from one another by roller sections or intermediate walls in the housing 1 which are immovable relative to the housing 1 and which require a corresponding design of the actuating member 22.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Push-Button Switches (AREA)

Abstract

The invention relates to a safety switch having a housing (1) which has at least one housing opening (21) for the insertion of an operating device (22) and in which a roller is arranged such that it can rotate in order to operate a contact support (9) which moves in the housing (1), the roller being locked against rotation and being capable of being unlocked and rotated by the insertion of the operating device (22). In order to obtain individual coding, it is provided that the roller comprises a plurality of discs (18) which are mounted independently of one another such that they can rotate about a shaft (17) and are all provided with a recess (19), like a control cam, by means of which a pin (15) is guided, which runs parallel to the shaft (17) and is connected to the contact support (9), the discs (18) having different radial recesses (20), facing at least one housing opening (21), for engagement with corresponding operating sections (23) of the operating device (22). <IMAGE>

Description

Die Erfindung betrifft einen Sicherheitsschalter mit einem Gehäuse, das mindestens eine Gehäuseöffnung zum Einführen eines Betätigungsorgans aufweist und in der eine Walze zur Betätigung eines im Gehäuse beweglichen Kontaktträgers drehbar angeordnet ist, wobei die Walze gegen Drehung gesperrt und durch das Einführen des Betätigungsorgans entsperrbar und drehbar ist.The invention relates to a safety switch with a housing, which has at least one housing opening for inserting an actuating member and in which a roller for actuating a contact carrier movable in the housing is rotatably arranged, the roller being locked against rotation and being unlockable and rotatable by inserting the actuating member .

Ein derartiger Sicherheitsschalter mit getrenntem Betätigungsorgan ist beispielsweise aus den DE-C-3 100 862, 3 330 109 und 3 433 048 bekannt. Dieser ist ohne großen Aufwand und ohne zusätzliche mechanischen Bauteile direkt an einer Schutzeinrichtung, etwa einer Schutztür oder einer Maschine anbringbar. Das Betätigungsorgan kann hierbei auch genügend kompliziert so gestaltet werden, daß es mit einfachen Mitteln nicht kopierbar ist, so daß ein Überlisten des Sicherheitsschalters mit Gegenständen des täglichen Gebrauchs (Schraubendrehern, Flaschenöffnern etc.) oder einfach gebogenen Werkzeugen (Büroklammern) nicht möglich ist. Jedoch sind die vom Schalterhersteller gelieferten Betätigungsorgane unter sich alle identisch, so daß man beispielsweise mit einem Ersatzbetätiger trotz offener Schutztür den Schalter betätigen kann.Such a safety switch with a separate actuator is known for example from DE-C-3 100 862, 3 330 109 and 3 433 048. This can be attached directly to a protective device, such as a protective door or a machine, with little effort and without additional mechanical components. The actuator can also be designed so complicated that it cannot be copied with simple means, so that it is not possible to outsmart the safety switch with everyday objects (screwdrivers, bottle openers, etc.) or simply bent tools (paper clips). However, the actuators supplied by the switch manufacturer are all identical, so that you can operate the switch, for example, with a replacement actuator despite the protective door being open.

Es wurde versucht, dieses Problem dadurch zu lösen, daß durch eine interne Feder ein lose eingestecktes Betätigungsorgan wieder herausgedrückt wird oder das Betätigungsorgan mehrere Teile umfaßt, die für sich allein den Schalter nicht betätigen können und erst gemeinsam montiert werden müssen, um ihre Funktion zu erfüllen. Im ersteren Fall läßt sich zumindest der Schalter durch eine zweite Person betätigen, im zweiten Fall lassen sich Teile auch auf einem kleinen Brett o.dgl. montieren, so daß wieder ein Ersatzschlüssel vorliegt.Attempts have been made to solve this problem in that a loosely inserted actuator is pushed out again by an internal spring or the actuator comprises several parts which cannot operate the switch by themselves and must first be assembled together in order to fulfill their function . In the former case, at least the switch can be operated by a second person, in the second case parts can also be placed on a small board or the like. mount so that there is a spare key again.

Die ferner bekannte Verwendung eines individuell elektronisch kodierten Betätigungsorgans im Zusammenhang mit einem mit einem integrierten Lesekopf ausgerüsteten Sicherheitsschalter, dem ein Auswertegerät zugeordnet ist, führt zu erheblich vergrößerten Baugrößen von Schalter und Betätigungsorgan, Problemen bezüglich der Unterbringung des Auswertegeräts, zusätzlichem Montageaufwand und Kosten und Störanfälligkeit.The further known use of an individually electronic Coded actuator in connection with a safety switch equipped with an integrated read head, to which an evaluation device is assigned, leads to considerably larger sizes of switches and actuators, problems with accommodating the evaluation device, additional assembly work and costs and susceptibility to faults.

Aufgabe der Erfindung ist es, einen Sicherheitsschalter der eingangs genannten Art zu schaffen, der ohne großen Aufwand individuell mechanisch kodiert ist.The object of the invention is to provide a safety switch of the type mentioned, which is individually mechanically coded without great effort.

Diese Aufgabe wird dadurch gelöst, daß die Walze mehrere, unabhängig voneinander um eine Achse drehbar gelagerte Scheiben umfaßt, die alle mit einer steuerkurvenartigen Ausnehmung versehen sind, durch die ein zur Achse parallel verlaufender, mit dem Kontaktträger verbundener Stift geführt ist, wobei die Scheiben unterschiedliche, der mindestens einen Gehäuseöffnung zugewandte Radialausnehmungen zum Eingriff mit entsprechenden Betätigungsabschnitten des Betätigungsorgangs aufweisen.This object is achieved in that the roller comprises a plurality of disks which are rotatable independently of one another about an axis, all of which are provided with a control-curve-like recess through which a pin running parallel to the axis and connected to the contact carrier is guided, the disks being different which have at least one housing opening facing radial recesses for engagement with corresponding actuating sections of the actuating mechanism.

Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further refinements of the invention can be found in the following description and the subclaims.

Die Erfindung wird nachstehend anhand eines in den beigefügten Abbildungen dargestellten Ausführungsbeispiels näher erläutert.The invention is explained below with reference to an embodiment shown in the accompanying figures.

Fig. 1 zeigt perspektivisch und ausschnittweise einen Sicherheitsschalter mit seinem Betätigungsorgan.Fig. 1 shows a perspective and detail of a safety switch with its actuator.

Fig. 2 zeigt ausschnittweise einen Längsschnitt durch den Sicherheitsschalter von Fig. 1.FIG. 2 shows a detail of a longitudinal section through the safety switch from FIG. 1.

Fig. 3 zeigt einen gegenüber Fig. 2 um 90° gedrehten Schnitt des Sicherheitsschalters von Fig. 1.FIG. 3 shows a section of the safety switch from FIG. 1 rotated by 90 ° with respect to FIG. 2.

Der dargestellte Sicherheitsschalter umfaßt ein Gehäuse 1, das durch Zwischenwände 2 in eine Kontaktkammer 3, eine Abdichtkammer 4 und eine Walzenkammer 5 unterteilt ist. In der Kontaktkammer 3 sind fest montierte Anschlußkontakte 6 angeordnet, während in die Kontaktkammer 3 ein einen Stößel 7 und eine Kontaktbrücke 8 umfassender Kontakträger 9 hineinragt. Der Stößel 7 wird durch Öffnungen in den Zwischenwänden 2 gerade geführt und ist durch eine sich im Gehäuse 1 abstützende Feder 10 in seine Ausgangsposition vorgespannt. Die Kontaktbrücke 8 ist gegenüber dem Stößel 7 in dessen Axialrichtung um einen vorbestimmten Hub gegen eine Federvorspannung 11 verschieblich. Ein Dichtungsbalg 12, der an einem Führungsfortsatz 13 der die Kontaktkammer 3 und die Abdichtkammer 4 trennenden Zwischenwand 2 befestigt ist, ist ferner an dem Stößel 7 befestigt, so daß die Kontaktkammer 3 gegen das Eindringen von Feuchtigkeit gesichert ist.The safety switch shown comprises a housing 1, which is divided into a contact chamber 3, a sealing chamber 4 and a roller chamber 5 by partitions 2. Fixed contact contacts 6 are arranged in the contact chamber 3, while a contact carrier 9 comprising a plunger 7 and a contact bridge 8 projects into the contact chamber 3. The plunger 7 is guided straight through openings in the intermediate walls 2 and is supported by a spring 10 supported in the housing 1 biased into its starting position. The contact bridge 8 is displaceable relative to the plunger 7 in the axial direction thereof by a predetermined stroke against a spring preload 11. A sealing bellows 12, which is fastened to a guide extension 13 of the intermediate wall 2 separating the contact chamber 3 and the sealing chamber 4, is also fastened to the tappet 7, so that the contact chamber 3 is secured against the ingress of moisture.

Der Stößel 7 trägt an seinem in die Walzenkammer 5 ragenden Ende eine bügelartige Halterung 14 für einen sich quer zur Längsachse des Stößels 7 erstreckenden Stift 15. Der Stift 15 ist an beiden Enden in einer sich in Bewegungsrichtung des Stößels 7 erstreckenden Führung 16 im Innern des Gehäuses 1 geführt. Die bügelartige Halterung 14 kann an den Innenseiten des Gehäuse 1 geführt sein.The plunger 7 carries at its end projecting into the roller chamber 5 a bracket-like holder 14 for a pin 15 extending transversely to the longitudinal axis of the plunger 7. The pin 15 is at both ends in a guide 16 extending in the direction of movement of the plunger 7 inside the Housing 1 out. The bracket-like holder 14 can be guided on the inside of the housing 1.

In der Walzenkammer 5 ist eine Achse 17 parallel zur Längsrichtung des Stiftes 15 angeordnet, auf der eine Reihe von Scheiben 18 unabhängig voneinander drehbar angeordnet ist.In the roller chamber 5, an axis 17 is arranged parallel to the longitudinal direction of the pin 15, on which a row of disks 18 is rotatably arranged independently of one another.

Jede Scheibe 18 ist mit einer steuerkurvenartigen Ausnehmung 18 für den Stift 15 versehen, wobei die steuerkurvenartigen Ausnehmungen 19 zweckmäßigerweise jeweils zwei einen Hub des Kontaktträgers 9 bewirkende, symmetrisch zueinander angeordnete Kurvenzweige aufweisen, so daß eine genügende Drehung der eine Walze bildenden Scheiben 18 sowohl in der einen wie auch in der anderen Drehrichtung einen entsprechenden Hub des Kontaktträgers 9 zur Betätigung des Sicherheitsschalters bewirkt. Hierzu ist beispielsweise eine Gestalt der Ausnehmungen 19 in Form einer sehr flachen "3" oder eines steilen, geschwungenen "V" (beispielsweise entsprechend den Steuernuten in der DE-PS 31 00 862, Abb. 1 und 5 mit den korrespondierenden Wirkungen bezüglich des Schaltvorgangs) zweckmäßig. In der Ausgangsposition befindet sich der Stift 15 in der Mitte der symmetrischen Ausnehmungen 19.Each disk 18 is provided with a control curve-like recess 18 for the pin 15, the control curve-like recesses 19 expediently each having two cam branches which bring about a stroke of the contact carrier 9 and are arranged symmetrically to one another, so that sufficient rotation of the disks 18 forming a roller both in the causes a corresponding stroke of the contact carrier 9 for actuating the safety switch, as in the other direction of rotation. For this is, for example, a shape of the recesses 19 in the form of a very flat "3" or a steep, curved "V" (for example, according to the control grooves in DE-PS 31 00 862, Fig. 1 and 5 with the corresponding effects with respect to the switching process ) expedient. In the starting position, the pin 15 is located in the middle of the symmetrical recesses 19.

Zur Betätigung des Kontaktträgers 9 über den Hub des Stiftes 15, der durch das Verdrehen der Scheiben 18 und damit der steuerkurvenartigen Ausnehmungen 19 bewirkt wird, sind die Scheiben 18 jeweils mit einer Radialausnehmung 20 versehen. Die Radialausnehmungen 20 sind in Richtung der Achse 16 und auf eine vorzugsweise schlitzartige GehäuseÖffnung 21 ausgerichtet, wobei durch die Gehäuseöffnung 21 ein Betätigungsorgan 22 einschiebbar ist.To actuate the contact carrier 9 via the stroke of the pin 15, which is caused by the rotation of the disks 18 and thus the control curve-like recesses 19, the disks 18 are each provided with a radial recess 20. The radial recesses 20 are in the direction of the axis 16 and on a preferably slot-like housing opening 21 aligned, wherein an actuator 22 can be inserted through the housing opening 21.

Beim dargestellten Ausführungsbeispiel sind vier Gehäuseöffnungen 21 zum Einführen des Betätigungsorgans 22 vorgesehen, von denen zwei stirnseitig und zwei dazu senkrecht verlaufend seitlich derart angeordnet sind, daß das seitlich oder benachbart stirnseitig eingeführte Betätigungsorgan 22 auf dieselben Radialausnehmungen 20 trifft, die hierzu eintrittsseitig zu einem Einführmaul erweitert sind, und in diese, wenn es sich um das passende Betätigungsorgan 22 handelt, einführbar ist. In diesem Fall besitzt jede Scheibe 18 zwei umfangsmäßig zueinander um 90° versetzt angeordnete Radialausnehmungen 20.In the illustrated embodiment, four housing openings 21 are provided for inserting the actuating member 22, two of which are arranged on the front side and two perpendicular to the side in such a way that the actuating member 22 inserted laterally or adjacent on the front side meets the same radial recesses 20, which on the inlet side expands into an insertion mouth are, and in this, if it is the appropriate actuator 22, is insertable. In this case, each disk 18 has two radial recesses 20 arranged circumferentially offset from one another by 90 °.

Die Walze wird hier aus einer Kombination von Scheiben 18 aus einer bestimmten Anzahl von Scheibentypen mit unterschiedlich geformten Radialausnehmungen 20 und gegebenenfalls Scheibenstärken gebildet. Die Radialausnehmungen 20 wirken beim Einschieben des Betätigungsorgans 22 mit korrespondierenden Betätigungsabschnitten 23 des Betätigungsorgangs 22 (breitere Radialausnehmungen 20 mit entsprechend breiten Betätigungsabschnitten 23, schmälere mit entsprechend schmalen Betätigungsabschnitten 23) zusammen, so daß die Scheiben 18 insgesamt entsprechend der Einschubrichtung des Betätigungsorgans 22 gedreht und damit der Kontakträger 9 zur Betätigung des Sicherheitsschalters verschoben wird.The roller is formed here from a combination of disks 18 from a certain number of disk types with differently shaped radial recesses 20 and, optionally, disk thicknesses. The radial recesses 20 interact when the actuator 22 is inserted with corresponding actuating sections 23 of the actuating mechanism 22 (wider radial recesses 20 with correspondingly wide actuating sections 23, narrower with correspondingly narrow actuating sections 23), so that the disks 18 are rotated overall in accordance with the direction of insertion of the actuating member 22 and thus the contact carrier 9 is moved to actuate the safety switch.

Wenn ein Betätigungsorgan 22 verwendet wird, dessen Betätigungsabschnitte 23 nicht mit den Radialausnehmungen 20 der entsprechenden Scheiben 18 korrespondieren, resultiert ein Verdrehen der Scheiben 18 gegeneinander und damit ein Blockieren des Stiftes 15 in den steuerkurvenartigen Ausnehmungen 19, so daß der Sicherheitsschalter nicht betätigbar ist. Entsprechendes würde auch passieren, wenn eine Betätigung mittels eines einfachen Werkzeugs versucht würde. Auch dieses würde gegen eine vorstehende Scheibe 18 treffen und diese gegenüber wenigstens einer anderen verdrehen, so daß der Stift 15 verklemmt.If an actuating member 22 is used, the actuating sections 23 of which do not correspond to the radial recesses 20 of the corresponding disks 18, the disks 18 are rotated relative to one another and thus a blocking of the pin 15 in the control curve-like recesses 19, so that the safety switch cannot be actuated. The same would happen if an operation were attempted using a simple tool. This would also hit a protruding disk 18 and twist it relative to at least one other so that the pin 15 is jammed.

Somit läßt sich der Sicherheitsschalter nur mit einem ganz bestimmten Betätigungsorgan 22 betätigen. Wenn man mit sechs Scheiben 18 ausgewählt aus fünf verschiedenen Scheibenformen arbeitet, erhält man 56 = 15625 unterschiedliche Kombinationsmöglichkeiten, bei acht Scheiben 18 sind es bereits 390625 Kombinationsmöglichkeiten, so daß man einen Mißbrauch durch ein Ersatzbetätigungsorgan wirksam unterbinden kann.Thus, the safety switch can only be operated with a very specific actuator 22. If you work with six discs 18 selected from five different disc shapes, you get 5 6 = 15625 different combinations, with eight discs 18 there are already 390,625 possible combinations, so that misuse by a replacement actuator can be effectively prevented.

Durch diese Art der individuellen Kodierung des Sicherheitsschalters werden die Baugröße sowie der Konstruktions- und Montageaufwand praktisch nicht beeinträchtigt und die bisherigen Vorteile wie die Betätigung aus mehreren Richtungen können erhalten bleiben.This type of individual coding of the safety switch means that the size as well as the construction and assembly effort are practically not affected and the previous advantages such as actuation from several directions can be retained.

Damit die Drehung einer Scheibe 18 nicht über Reibschluß die Drehung einer oder mehrerer benachbarter Scheiben 18 bewirkt, können die Scheiben 18 mit Abstand zueinander auf der Achse 17 angeordnet sein. Sie können als ganzes Paket axial verschiebbar auf der Achse 17 angeordnet sein. Es ist dann zweckmäßig, seitlich am Betätigungsorgan 22 vorstehende Keilflächen 24 vorzusehen, die das Schaltscheibenpaket in die richtige Lage verschieben, so daß anschließend die Betätigungsabschnitte 23 auf die korrespondierenden Radialausnehmungen 20 treffen. Dadurch kann die seitliche Toleranz für das Einführen des Betätigungsorgans 22 erheblich vergrößert werden.So that the rotation of a disk 18 does not cause the rotation of one or more adjacent disks 18 via frictional engagement, the disks 18 can be arranged at a distance from one another on the axis 17. They can be arranged axially displaceably on the axis 17 as a whole package. It is then expedient to provide wedge surfaces 24 protruding laterally on the actuating member 22, which shift the switching disk pack into the correct position, so that the actuating sections 23 subsequently meet the corresponding radial recesses 20. As a result, the lateral tolerance for the insertion of the actuating member 22 can be increased considerably.

Gegebenenfalls können die Scheiben 18 auch in zwei oder mehr Gruppen aufgeteilt sein, die durch gegenüber dem Gehäuse 1 unbewegliche Walzenabschnitte oder Zwischenwände im Gehäuse 1 voneinander getrennt sind und eine entsprechende Ausbildung des Betätigungsorgans 22 erfordern.If appropriate, the disks 18 can also be divided into two or more groups which are separated from one another by roller sections or intermediate walls in the housing 1 which are immovable relative to the housing 1 and which require a corresponding design of the actuating member 22.

Claims (7)

Sicherheitsschalter mit einem Gehäuse (1), das mindestens eine Gehäuseöffnung (21) zum Einführen eines Betätigungsorgans (22) aufweist und in der eine Walze zur Betätigung eines im Gehäuse (1) beweglichen Kontaktträgers (9) drehbar angeordnet ist, wobei die Walze gegen Drehung gesperrt und durch das Einführen des Betätigungsorgans (22) entsperrbar und drehbar ist, dadurch gekennzeichnet, daß die Walze mehrere, unabhängig voneinander um eine Achse (17) drehbar gelagerte Scheiben (18) umfaßt, die alle mit einer steuerkurvenartigen Ausnehmung (19) versehen sind, durch die ein zur Achse (17) parallel verlaufender, mit dem Kontaktträger (9) verbundener Stift (15) geführt ist, wobei die Scheiben (18) unterschiedliche, der mindestens einen Gehäuseöffnung (21) zugewandte Radialausnehmungen (20) zum Eingriff mit entsprechenden Betätigungsabschnitten (23) des Betätigungsorgangs (22) aufweisen.Safety switch with a housing (1) which has at least one housing opening (21) for introducing an actuating member (22) and in which a roller for actuating a contact carrier (9) movable in the housing (1) is rotatably arranged, the roller preventing rotation locked and unlockable and rotatable by the insertion of the actuating member (22), characterized in that the roller comprises a plurality of disks (18) which are rotatable independently of one another about an axis (17) and which are all provided with a control-curve-like recess (19) through which a pin (15) running parallel to the axis (17) and connected to the contact carrier (9) is guided, the disks (18) having different radial recesses (20) facing the at least one housing opening (21) for engagement with corresponding ones Have actuating sections (23) of the actuating mechanism (22). Sicherheitsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Scheiben (18) axial verschiebbar auf der Achse (17) angeordnet sind und das Betätigungsorgan (22) Keilflächen (24) zum Verschieben der Scheiben (18) aufweist.Safety switch according to Claim 1, characterized in that the disks (18) are arranged axially displaceably on the axis (17) and the actuating member (22) has wedge surfaces (24) for displacing the disks (18). Sicherheitsschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Stift (15) in Bewegungsrichtung des Kontaktträgers (9) im Gehäuse (1) geführt ist.Safety switch according to claim 1 or 2, characterized in that the pin (15) is guided in the direction of movement of the contact carrier (9) in the housing (1). Sicherheitsschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Kontaktträger (9) eine bügelartige Halterung (14) für den Stift (15) aufweist.Safety switch according to one of claims 1 to 3, characterized in that the contact carrier (9) has a bracket-like holder (14) for the pin (15). Sicherheitsschalter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Walze aus einer Kombination einer bestimmten Anzahl von Scheiben (18) aus einer bestimmten Anzahl von Scheibentypen mit unterschiedlich geformten Radialausnehmungen (20) und gegebenenfalls Scheibenstärken gebildet wird.Safety switch according to one of Claims 1 to 4, characterized in that the roller is formed from a combination of a certain number of disks (18) from a certain number of disk types with differently shaped radial recesses (20) and optionally disk thicknesses. Sicherheitsschalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die steuerkurvenartige Ausnehmungen (19) jeweils zwei einen Hub des Kontaktträgers (9) bewirkende, symmetrisch zueinander angeordnete Kurvenzweige aufweisen.Safety switch according to one of claims 1 to 5, characterized in that the control curve-like recesses (19) in each case have two cam branches which cause a stroke of the contact carrier (9) and are arranged symmetrically to one another. Sicherheitsschalter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Radialausnehmungen (20) jeweils mit einer Erweiterung ihres Eintrittsbereichs zur Einschiebbarkeit des Betätigungsorgans (22) aus zwei zueinander senkrechten Richtungen durch entsprechende Gehäuseöffnungen (21) versehen sind.Safety switch according to one of Claims 1 to 6, characterized in that the radial recesses (20) are each provided with an extension of their entry area so that the actuating member (22) can be inserted from two mutually perpendicular directions through corresponding housing openings (21).
EP94100405A 1993-02-05 1994-01-13 Safety switch Expired - Lifetime EP0609672B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4303367 1993-02-05
DE4303367A DE4303367C1 (en) 1993-02-05 1993-02-05 Security switch for safety door - has switch operating element fitted in switch housing to rotate cam discs acting as operating roller for movable contact carrier

Publications (3)

Publication Number Publication Date
EP0609672A2 true EP0609672A2 (en) 1994-08-10
EP0609672A3 EP0609672A3 (en) 1994-12-28
EP0609672B1 EP0609672B1 (en) 1998-07-22

Family

ID=6479743

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Application Number Title Priority Date Filing Date
EP94100405A Expired - Lifetime EP0609672B1 (en) 1993-02-05 1994-01-13 Safety switch

Country Status (5)

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US (1) US5420385A (en)
EP (1) EP0609672B1 (en)
JP (1) JP3207654B2 (en)
BR (1) BR9400421A (en)
DE (1) DE4303367C1 (en)

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Also Published As

Publication number Publication date
US5420385A (en) 1995-05-30
EP0609672B1 (en) 1998-07-22
EP0609672A3 (en) 1994-12-28
JP3207654B2 (en) 2001-09-10
DE4303367C1 (en) 1994-02-24
BR9400421A (en) 1994-08-23
JPH06243762A (en) 1994-09-02

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