EP0938113B1 - Safety switch - Google Patents
Safety switch Download PDFInfo
- Publication number
- EP0938113B1 EP0938113B1 EP99100233A EP99100233A EP0938113B1 EP 0938113 B1 EP0938113 B1 EP 0938113B1 EP 99100233 A EP99100233 A EP 99100233A EP 99100233 A EP99100233 A EP 99100233A EP 0938113 B1 EP0938113 B1 EP 0938113B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- switching roller
- switching
- actuating
- plunger
- 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
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
- H01H27/002—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards
- H01H2027/005—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards the key receiving part having multiple openings to allow keys from different directions to operate the switch
Definitions
- the present invention relates to a safety switch with a housing and one rotatably mounted therein and used to actuate a switching plunger Shift drum, which has an actuator that can be inserted into the housing from the outside is rotatable a predetermined angular amount.
- a safety switch is e.g. known from EP-A-0 778 595.
- Safety switches of the type mentioned above are known in many embodiments and serve, for example, when opening protective covers on machines, Devices or the like to ensure that by opening a protective cover the corresponding machine or device is immediately switched off becomes.
- Safety switches of the generic type can of course can also be used for many other purposes.
- the known safety switches are provided with specially designed actuators and only to be operated via these special actuators, whereby this design corresponds to the The purpose is to outsmart the safety switch using simple tools or to prevent the like.
- the magnets are only attached to the outside of the Entry openings for the actuator.
- the present invention has for its object a safety switch to improve the generic type in a simple and practical manner, that additional security requirements that occur in practice can be met.
- a solution to this problem is that at least a cam disc or an eccentric disc against rotation at one end edge of the shift drum is attached, on the outer edge of a slidably mounted in the housing and spring-loaded plunger, which is applied when the shift drum is actuated the cam disc or the eccentric disc against the action of at least one Spring is shifted and in the actuating end position of the shift drum, the cam or the eccentric disc and thus the shift drum with one of the Actuating direction of rotation applies the same torque.
- Another solution to the problem of the invention is that at least a cam disc or an eccentric disc on one end edge of the shift drum is secured against rotation, on the outer edge of which is displaceable in the housing mounted and spring loaded plunger is present when the shift drum is actuated through the cam disc or the eccentric disc against the effect at least a spring is shifted and in the actuating end position of the shift drum Cam disc or the eccentric disc and thus the shift drum with one the torque opposite to the direction of actuation is applied.
- master keys For example, when setting up machine tools, it may be necessary to be able to switch on the machine in question despite the protective hood being open. There in in such a case there is an increased danger factor, in many Operated so-called "master keys" issued to particularly reliable employees.
- master key corresponds in terms of its design the usual actuator for a safety switch, so that the concerned Person manually push the master key into the insertion opening of a safety switch insert and operate the safety switch.
- a machine can only be used while the protective hood is open stay on, like a correspondingly reliable and possibly A person who has been specially trained in safety technology is aware of the master key press into the housing and hold in the actuation position.
- the reference symbol 1 denotes a safety switch, the one with a housing 2 shown only partially and one stored therein and the actuation of a shift plunger 3 serving shift drum 4 is.
- the switching plunger 3 can be clearly seen in FIGS. 7 and 8.
- the invention deals with the possibility of additional security aspects the implementation of the safety switch 1.
- a safety switch 1 is thus in the exemplary embodiments according to FIGS. 1-4 shown that in the case of an actuation by an external into the housing 2nd insertable actuator 5 increased security against accidental ejection this actuator 5 has.
- Such increased security against accidental ejection of the actuator 5 is advantageous, for example, when the safety switch 1 in question Special vibrations, shocks or the like comes.
- a cam 6 is secured against rotation set, on the outer edges 6a, a plunger 7 rests, which is inside the housing 2 is slidably mounted and loaded by springs 8.
- the cams 6 are designed so that the tappet 7 when the shift drum 4 is actuated is moved against the action of the springs 8 and that in this actuation end position the shift drum 4 a torque by the spring-loaded plunger 7 is applied to the cams 6, the direction of which is identical to that Direction of rotation of the shift drum 4.
- FIGS. 5 and 6 show an exemplary embodiment of the invention in which a different security concept is pursued.
- Actuator 5 holds the shift drum 4 in the actuation end position only as long as a person who has introduced the master key, corresponding external forces on the master key.
- the cams 6 are designed so that by the spring-loaded plunger 7 in the actuating end position of the shift drum 4 Torque applied to the cam discs 6 and thus also to the shift drum 4 which is the opposite direction of actuation of the shift drum 4 is. So becomes a master key inserted by hand from the person concerned let go, either by inattentiveness or by distraction kind, the master key 5 is immediately over by actuating the shift drum 4 the spring-loaded plunger 7 and the cams 6 moved out of the housing 2 and the safety switch 1 brought into the off position.
- Both in the embodiment of the invention according to Figures 1-4 and in Embodiment according to Figures 5 and 6 are on both front edges of the Shift drum 4 cams 6 fixed against rotation.
- Deviating from the exemplary embodiments shown, can be on or on Both front edges of the shift drum 4 can also be fitted with eccentric discs which have the same functions as the cam disks described 6th
- the cams 6 are geometric designed so that these cams 6 by simply "plugging" the two specified, can perform different functions.
- FIGS. 7 and 8 make clear, is on the front edge of the shift drum 4 a pin 9 is attached, which in a corresponding opening 10 of the respective Cam 6 engages, which is otherwise attached to the axis 11 of the shift drum 4 is.
- a pin 9 is attached, which in a corresponding opening 10 of the respective Cam 6 engages, which is otherwise attached to the axis 11 of the shift drum 4 is.
- the tappet 7 is chamfered like a roof in the contact area to the cam plates 6, whereby the sequence of movements between the cams 6 on the one hand and the Tappet 7, on the other hand, can be made relatively smooth.
- FIGS. 2-8 each show two actuators 5, with reference to this here is that this is only to signal that an actuator 5 from different Directions can be retracted into the housing 2. In practice of course, only one actuator 5 will ever be used.
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Gear-Shifting Mechanisms (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Control Of Combustion (AREA)
- Air Bags (AREA)
- Mechanical Control Devices (AREA)
- Push-Button Switches (AREA)
Description
Die vorliegende Erfindung betrifft einen Sicherheitsschalter mit einem Gehäuse und einer darin drehbar gelagerten und der Betätigung eines Schalt-Stößels dienenden Schaltwalze, die über einen von außen in das Gehäuse einführbaren Betätiger um einen vorbestimmten Winkelbetrag drehbar ist. Ein solcher Sicherheitsschalter ist z.B. aus EP-A-0 778 595 bekannt.The present invention relates to a safety switch with a housing and one rotatably mounted therein and used to actuate a switching plunger Shift drum, which has an actuator that can be inserted into the housing from the outside is rotatable a predetermined angular amount. Such a safety switch is e.g. known from EP-A-0 778 595.
Sicherheitsschalter der vorerwähnten Art sind in vielerlei Ausführungsformen bekannt und dienen beispielsweise dazu, beim Öffnen von Schutzabdeckungen an Maschinen, Geräten oder dergleichen sicherzustellen, daß mit dem Öffnen einer Schutzabdeckung sofort die entsprechende Maschine oder das entsprechende Gerät ausgeschaltet wird. Sicherheitsschalter der gattungsgemäßen Art können selbstverständlich auch zu vielen anderen Zwecken eingesetzt werden.Safety switches of the type mentioned above are known in many embodiments and serve, for example, when opening protective covers on machines, Devices or the like to ensure that by opening a protective cover the corresponding machine or device is immediately switched off becomes. Safety switches of the generic type can of course can also be used for many other purposes.
Die bekannten Sicherheitsschalter sind mit speziell gestalteten Betätigern versehen und nur über diese speziellen Betätiger zu bedienen, wobei diese Gestaltung dem Zweck dient, ein Überlisten des Sicherheitsschalters mittels einfacher Werkzeuge oder dergleichen zu verhindern.The known safety switches are provided with specially designed actuators and only to be operated via these special actuators, whereby this design corresponds to the The purpose is to outsmart the safety switch using simple tools or to prevent the like.
Es sind Sicherheitsschalter der gattungsgemäßen Art bekannt, bei denen durch Haftmagnete erreicht wird, daß der Betätiger im eingefahrenen Zustand und somit bei betätigtem Sicherheitsschalter durch Magnetkräfte zusätzlich gesichert wird, um ein unbeabsichtigtes Herausgleiten des Betätigers aus dem Gehäuse durch Erschütterungen oder dergleichen zu vermeiden.There are safety switches of the generic type, in which by Holding magnets is achieved that the actuator in the retracted state and thus at actuated safety switch is additionally secured by a magnetic force Accidental sliding of the actuator out of the housing To avoid vibrations or the like.
Die Anbringung der Haftmagnete erfolgt dabei ausschließlich im Außenbereich der Einführöffnungen für den Betätiger.The magnets are only attached to the outside of the Entry openings for the actuator.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Sicherheitsschalter der gattungsgemäßen Art auf einfache und praxisgerechte Weise dahingehend zu verbessern, daß zusätzlichen, in der Praxis vorkommenden Sicherheitsanforderungen entsprochen werden kann.The present invention has for its object a safety switch to improve the generic type in a simple and practical manner, that additional security requirements that occur in practice can be met.
Eine Lösung dieser Aufgabe besteht erfindungsgemäß darin, daß an mindestens einer Stirnkante der Schaltwalze eine Kurvenscheibe oder eine Exzenterscheibe verdrehsicher befestigt ist, an deren Außenkante ein im Gehäuse verschiebbar gelagerter und federbelasteter Stößel anliegt, der bei Betätigung der Schaltwalze durch die Kurvenscheibe oder die Exzenterscheibe entgegen der Wirkung mindestens einer Feder verschoben ist und in Betätigungsendstellung der Schaltwalze die Kurvenscheibe oder die Exzenterscheibe und damit auch die Schaltwalze mit einem der Betätigungsdrehrichtung gleichgerichteten Drehmoment beaufschlagt.According to the invention, a solution to this problem is that at least a cam disc or an eccentric disc against rotation at one end edge of the shift drum is attached, on the outer edge of a slidably mounted in the housing and spring-loaded plunger, which is applied when the shift drum is actuated the cam disc or the eccentric disc against the action of at least one Spring is shifted and in the actuating end position of the shift drum, the cam or the eccentric disc and thus the shift drum with one of the Actuating direction of rotation applies the same torque.
Mit dieser Lösung der erfindungsgemäßen Aufgabe wird der Vorteil erzielt, daß der erfindungsgemäße Sicherheitsschalter mit rein mechanischen und geschützt im Inneren des Gehäuses liegenden Mitteln mit einer erhöhten oder verstärkten Zuhaltekraft ausgestattet ist, d. h., daß eine Schalterbetätigung des Sicherheitsschalters durch Erschütterungen, Vibrationen oder dergleichen praktisch ausgeschlossen ist.With this solution to the problem of the invention, the advantage is achieved that Safety switch according to the invention with purely mechanical and protected in Means lying inside the housing with an increased or increased locking force is equipped, d. that is, a switch operation of the safety switch is practically excluded by shocks, vibrations or the like.
Eine andere Lösung der erfindungsgemäßen Aufgabe besteht darin, daß an mindestens einer Stirnkante der Schaltwalze eine Kurvenscheibe oder eine Exzenterscheibe verdrehsicher befestigt ist, an deren Außenkante ein im Gehäuse verschiebbar gelagerter und federbelasterer Stößel anliegt, der bei Betätigung der Schaltwalze durch die Kurvenscheibe oder die Exzenterscheibe entgegen der Wirkung mindestens einer Feder verschoben ist und in Betätigungsendstellung der Schaltwalze die Kurvenscheibe oder die Exzenterscheibe und damit auch die Schaltwalze mit einem der Betätigungsdrehrichtung entgegengesetzten Drehmoment beaufschlagt.Another solution to the problem of the invention is that at least a cam disc or an eccentric disc on one end edge of the shift drum is secured against rotation, on the outer edge of which is displaceable in the housing mounted and spring loaded plunger is present when the shift drum is actuated through the cam disc or the eccentric disc against the effect at least a spring is shifted and in the actuating end position of the shift drum Cam disc or the eccentric disc and thus the shift drum with one the torque opposite to the direction of actuation is applied.
Mit dieser Lösung wird der nachfolgend geschilderten und in der Praxis häufiger vorkommenden Situation entsprochen: With this solution, the one described below and occurring more frequently in practice becomes Situation matched:
Beispielsweise beim Einrichten von Werkzeugmaschinen kann es erforderlich sein, die betreffende Maschine trotz geöffneter Schutzhaube einschalten zu können. Da in einem derartigen Falle ein erhöhtes Gefahrenmoment gegeben ist, werden in vielen Betrieben sogenannte "Meisterschlüssel" an besonders zuverlässige Mitarbeiter ausgegeben. Ein derartiger Meisterschlüssel entspricht hinsichtlich seiner Formgestaltung dem üblichen Betätiger für einen Sicherheitsschalter, so daß die betreffende Person den Meisterschlüssel von Hand in die Einführöffnung eines Sicherheitsschalters einführen und den Sicherheitsschalter betätigen kann.For example, when setting up machine tools, it may be necessary to be able to switch on the machine in question despite the protective hood being open. There in in such a case there is an increased danger factor, in many Operated so-called "master keys" issued to particularly reliable employees. Such a master key corresponds in terms of its design the usual actuator for a safety switch, so that the concerned Person manually push the master key into the insertion opening of a safety switch insert and operate the safety switch.
Durch die Gestaltung des Sicherheitsschalters gemäß der zweiten angegebenen Lösung wird nun bewirkt, daß der Meisterschlüssel aus dem Gehäuse herausbewegt wird, sobald die betreffende Person durch Unaufmerksamkeit, im Falle einer Ablenkung oder anderer Störfälle den Meisterschlüssel losläßt. Dadurch wird die betreffende Maschine sofort wieder ausgeschaltet und eventuelle Gefahrensituationen vermieden.By designing the safety switch according to the second solution given the master key is now caused to move out of the housing will as soon as the person concerned due to inattentiveness, in the event of a distraction or other accidents lets go of the master key. This will make the The machine in question is switched off immediately and possible dangerous situations avoided.
Mit anderen Worten kann eine Maschine bei geöffneter Schutzhaube nur solange im eingeschalteten Zustand bleiben, wie eine entsprechend zuverlässige und möglicherweise sicherheitstechnisch auch besonders geschulte Person bewußt den Meisterschlüssel in das Gehäuse hineindrückt und in der Betätigungsstellung festhält.In other words, a machine can only be used while the protective hood is open stay on, like a correspondingly reliable and possibly A person who has been specially trained in safety technology is aware of the master key press into the housing and hold in the actuation position.
Weitere Merkmale der Erfindung sind Gegenstand von Unteransprüchen.Further features of the invention are the subject of dependent claims.
Ausführungsbeispiele der Erfindung sind in den beigefügten Zeichnungen dargestellt und werden im folgenden näher beschrieben.Embodiments of the invention are shown in the accompanying drawings and are described in more detail below.
Es zeigen:
- Figur 1
- eine perspektivisch dargestellte Teilansicht eines erfindungsgemäßen Sicherheitsschalters im nicht betätigten Zustand,
Figur 2- eine der Figur 1 entsprechende Darstellung bei betätigtem Sicherheitsschalter,
- Figur 3
- einen Teilschnitt durch einen Sicherheitsschalter gemäß den Figuren 1 und 2 im nichtbetätigten Zustand,
- Figur 4
- eine Schnittdarstellung des Sicherheitsschalters gemäß Figur 3 im betätigten Zustand,
Figur 5- einen der Figur 3 entsprechenden Teilschnitt durch einen Sicherheitsschalter nach einem weiteren Ausführungsbeispiel der Erfindung,
Figur 6- einen der
Figur 5 entsprechenden Teilschnitt durch den Sicherheitsschalter im betätigten Zustand, Figur 7- einen der Figur 3 entsprechenden Schnitt unter Weglassung einer in Figur 3 dargestellten Kurvenscheibe,
Figur 8- einen der
Figur 7 entsprechenden Schnitt durch den Sicherheitsschalter im betätigten Zustand.
- Figure 1
- 2 shows a perspective view of a safety switch according to the invention in the non-actuated state,
- Figure 2
- 2 shows a representation corresponding to FIG. 1 when the safety switch is actuated,
- Figure 3
- 2 shows a partial section through a safety switch according to FIGS. 1 and 2 in the non-actuated state,
- Figure 4
- 3 shows a sectional illustration of the safety switch according to FIG. 3 in the actuated state,
- Figure 5
- 3 shows a partial section corresponding to FIG. 3 through a safety switch according to a further exemplary embodiment of the invention,
- Figure 6
- 5 shows a partial section corresponding to FIG. 5 through the safety switch in the actuated state,
- Figure 7
- 4 shows a section corresponding to FIG. 3, omitting a cam disk shown in FIG. 3,
- Figure 8
- a section corresponding to Figure 7 through the safety switch in the actuated state.
In allen Zeichnungen ist mit dem Bezugszeichen 1 jeweils ein Sicherheitsschalter bezeichnet,
der mit einem nur teilweise dargestellten Gehäuse 2 und einer darin gelagerten
und der Betätigung eines Schalt-Stößels 3 dienenden Schaltwalze 4 ausgestattet
ist.In all drawings, the reference symbol 1 denotes a safety switch,
the one with a
Der Schaltstößel 3 ist in den Figuren 7 und 8 deutlich erkennbar.The switching plunger 3 can be clearly seen in FIGS. 7 and 8.
Auf die Darstellung des weiteren, schaltungstechnischen Aufbaus des Sicherheitsschalters ist aus Gründen der Übersichtlichkeit hier verzichtet, da dieser bekannte schaltungstechnische Aufbau des Sicherheitsschalters 1 dem Fachmann allgemein bekannt ist und im Zuge der vorliegenden Erfindung keine Veränderung erfahren hat.On the representation of the further circuitry structure of the safety switch is omitted here for reasons of clarity, since this is known circuitry structure of the safety switch 1 to the specialist in general is known and has not undergone any change in the course of the present invention.
Die Erfindung beschäftigt sich mit der Möglichkeit, zusätzliche Sicherheitsaspekte bei der Ausführung des Sicherheitsschalters 1 zu realisieren.The invention deals with the possibility of additional security aspects the implementation of the safety switch 1.
So ist in den Ausführungsbeispielen nach den Figuren 1-4 ein Sicherheitsschalter 1
dargestellt, der im Falle einer Betätigung durch einen von außen in das Gehäuse 2
einführbaren Betätiger 5 eine erhöhte Sicherheit gegen unbeabsichtigtes Auswerfen
dieses Betätigers 5 aufweist.A safety switch 1 is thus in the exemplary embodiments according to FIGS. 1-4
shown that in the case of an actuation by an external into the housing 2nd
Eine derartige erhöhte Sicherheit gegen unbeabsichtigtes Auswerfen des Betätigers
5 ist beispielsweise dann vorteilhaft, wenn der betreffende Sicherheitsschalter 1 im
Bereich besonderer Vibrationen, Erschütterungen oder dergleichen zum Einsatz
kommt.Such increased security against accidental ejection of the
Die angegebene Sicherheit wird bei der Konstruktion gemäß den Figuren 1-4 durch folgende Maßnahmen erreicht: The specified security is in the construction according to Figures 1-4 by achieved the following measures:
Auf beiden Stirnseiten der Schaltwalze 4 ist eine Kurvenscheibe 6 verdrehsicher
festgelegt, an deren Außenkanten 6a ein Stößel 7 anliegt, der innerhalb des Gehäuses
2 verschiebbar gelagert und durch Federn 8 belastet ist.On both ends of the shift drum 4, a
Die Kurvenscheiben 6 sind so gestaltet, daß bei betätigter Schaltwalze 4 der Stößel 7
entgegen der Wirkung der Federn 8 verschoben ist und daß in dieser Betätigungsendstellung
der Schaltwalze 4 durch den federbelasteten Stößel 7 ein Drehmoment
auf die Kurvenscheiben 6 aufgebracht wird, dessen Richtung identisch ist mit der
Betätigungsdrehrichtung der Schaltwalze 4.The
Dies ist konstruktiv dadurch realisiert, daß der im nutzbaren Drehwinkelbereich der Schaltwalze 4 liegende Kurvenabschnitt der Kurvenscheiben 6 - in Betätigungsdrehrichtung der Schaltwalze 4 gesehen - bis kurz vor Erreichen der Betätigungsendstellung ständig ansteigend und nach Überschreitung eines oberen Totpunktes abfallend ausgebidlet ist.This is realized constructively in that the in the usable rotation angle range Shift drum 4 lying curve section of the cams 6 - in the direction of actuation the shift drum 4 seen - until shortly before reaching the actuation end position constantly rising and falling after exceeding a top dead center is trained.
In Figur 4 ist die betätigte Stellung der Schaltwalze 4 mit der vorstehend beschriebenen,
zusätzlichen Sicherung gegen unbeabsichtigtes Lösen eines Betätigers 5 dargestellt.
Es ist deutlich erkennbar, daß die Kurvenscheiben 6 durch den federbelasteten
Stößel in der gleichen Drehrichtung beaufschlagt sind wie die Schaltwalze 4
durch den in das Gehäuse 2 eingeführten Betätiger 5.In Figure 4, the actuated position of the shift drum 4 with the previously described,
additional protection against unintentional loosening of an
Durch entsprechende Dimensionierung der Federn 8 kann erreicht werden, daß
selbst extreme Erschütterungen oder andere, zufällig auf den Sicherheitsschalter
einwirkende äußere Kräfte nicht in der Lage sind, den jeweils genutzten Betätiger 5
aus dem Gehäuse 2 heraus zu bewegen.By appropriate dimensioning of the
In den Figuren 5 und 6 ist ein Ausführungsbeispiel der Erfindung gezeigt, bei dem ein anderes Sicherheitskonzept verfolgt wird.FIGS. 5 and 6 show an exemplary embodiment of the invention in which a different security concept is pursued.
Es soll erreicht werden, daß ein von Hand in das Gehäsue 2 eingeschobener
"Meisterschlüssel", d. h., ein von einer Schutzabdeckung oder dergleichen unabhängiger
Betätiger 5 die Schaltwalze 4 nur solange in Betätigungsendstellung hält, wie
eine Person, die den Meisterschlüssel eingeführt hat, entsprechende äußere Kräfte
auf den Meisterschlüssel ausübt.It should be achieved that a manually inserted into the
Diese Forderung wird dadurch erfüllt, daß die Kurvescheiben 6 so gestaltet sind, daß
durch den federbelasteten Stößel 7 in Betätigungsendstellung der Schaltwalze 4 ein
Drehmoment auf die Kurvenscheiben 6 und damit auch auf die Schaltwalze 4 aufgebracht
wird, welches der Betätigungsdrehrichtung der Schaltwalze 4 entgegengesetzt
ist. Wird also ein von Hand eingführter Meisterschlüssel von der betreffenden Person
losgelassen, sei es durch Unaufmerksamkeit oder durch eine Ablenkung beliebiger
Art, so wird sofort der Meisterschlüssel 5 durch Betätigung der Schaltwalze 4 über
den federbelasteten Stößel 7 und die Kurvenscheiben 6 aus dem Gehäuse 2 herausbewegt
und der Sicherheitsschalter 1 in Ausschaltstellung gebracht.This requirement is met in that the
Sowohl beim Ausführungsbeispiel der Erfindung nach den Figuren 1-4 wie auch beim
Ausführungsbeispiel nach den Figuren 5 und 6 sind an jeweils beiden Stirnkanten der
Schaltwalze 4 Kurvenscheiben 6 verdrehsicher befestigt.Both in the embodiment of the invention according to Figures 1-4 and in
Embodiment according to Figures 5 and 6 are on both front edges of the
Shift drum 4
Die oben beschriebenen Funktionen lassen sich auch dadurch erreichen, daß lediglich an einer Stirnkante eine Kurvenscheibe in der entsprechenden Gestaltung angeordnet ist. Die Verwendung von zwei Kurvenscheiben an jeder Stirnkante der Schaltwalze bringt allerdings eine Vergleichmäßigung des auf die Schaltwalze 4 aufgebrachten Drehmomentes mit sich, so daß eine derartige Lösung in der Praxis vorzuziehen ist.The functions described above can also be achieved in that only a cam disc is arranged in the corresponding design on one end edge is. The use of two cams on each end edge of the shift drum however, brings an equalization of the applied to the shift drum 4 Torque with it, so that such a solution is preferable in practice is.
Abweichend von den dargestellten Ausführungsbeispielen können an einer oder an beiden Stirnkanten der Schaltwalze 4 auch Exzenterscheiben montiert sein, mit denen die gleichen Funktionen erreichbar sind wie durch die beschriebenen Kurvenscheiben 6.Deviating from the exemplary embodiments shown, can be on or on Both front edges of the shift drum 4 can also be fitted with eccentric discs which have the same functions as the cam disks described 6th
In den dargestellten Ausführungsbeispielen sind die Kurvenscheiben 6 geometrisch
so gestaltet, daß diese Kurvenscheiben 6 durch einfaches "Umstecken" die beiden
angegebenen, unterschiedlichen Funktionen erfüllen können.In the exemplary embodiments shown, the
Wie die Figuren 7 und 8 deutlich machen, ist jeweils an der Stirnkante der Schaltwalze
4 ein Stift 9 befestigt, der in eine entsprechende Öffnung 10 der jeweiligen
Kurvenscheibe 6 eingreift, die im übrigen auf der Achse 11 der Schaltwalze 4 aufgesteckt
ist. Um nun von einer Einbaulage der Kurvenscheiben 6 gemäß den Figuren 3
und 4 zu der Einbaulage nach den Figuren 5 und 6 zu gelangen, genügt es, die jeweiligen
Kurvenscheiben 6 von der Schaltwalze abzunehmen, um 180° zu wenden
und dann wieder auf die Achse 11 aufzustecken, wobei selbstverständlich der Stift 9
an der Schaltwalze 4 in die dazugehörige Öffnung 10 der Kurvenscheibe 6 eingreifen
muß.As FIGS. 7 and 8 make clear, is on the front edge of the shift drum
4 a
Der Stößel 7 ist im Anlagebereich zu den Kurvenscheiben 6 dachartig abgeschrägt,
wodurch der Bewegungsablauf zwischen den Kurvenscheiben 6 einerseits und dem
Stößel 7 andererseits verhältnismäßig leichtgängig gestaltet werden kann. The
In den Figuren 2-8 sind jeweils zwei Betätiger 5 dargestellt, wobei hier darauf hinzuweisen
ist, daß damit lediglich signalisiert werden soll, daß ein Betätiger 5 aus unterschiedlichen
Richtungen in das Gehäuse 2 eingefahren werden kann. In der Praxis
wird selbstverständlich immer nur ein Betätiger 5 zum Einsatz kommen.FIGS. 2-8 each show two
Claims (7)
- Safety switch (1) having a housing (2) and a switching roller (4), which is mounted in a rotatable manner in the housing and serves for actuating a switching plunger (3) and can be rotated through a predetermined angle by an actuator (5) which can be introduced into the housing (2) from the outside, characterized in that fastened in a rotationally fixed manner on at least one end edge of the switching roller (4) is a cam plate (6) or an eccentric plate, against the outer edge (6a) of which a spring-loaded plunger (7), which is mounted in a displaceable manner in the housing (2), butts, said plunger being displaced counter to the action of at least one spring (8), when the switching roller (4) is actuated by the cam plate (6) or the eccentric plate, and, in the actuating end position of the switching roller (4), acting on the cam plate (6) or the eccentric plate, and thus also the switching roller (4), with a torque which is in the same direction as the actuating direction of rotation.
- Safety switch (1) having a housing (2) and a switching roller (4), which is mounted in a rotatable manner in the housing and serves for actuating a switching plunger (3) and can be rotated through a predetermined angle by an actuator (5) which can be introduced into the housing (2) from the outside, characterized in that fastened in a rotationally fixed manner on at least one end edge of the switching roller (4) is a cam plate (6) or an eccentric plate, against the outer edge (6a) of which a spring-loaded plunger (7), which is mounted in a displaceable manner in the housing (2), butts, said plunger being displaced counter to the action of at least one spring (8), when the switching roller (4) is actuated by the cam plate (6) or the eccentric plate, and, in the actuating end position of the switching roller (4), acting on the cam plate (6) or the eccentric plate, and thus also the switching roller (4), with a torque which is counter to the actuating direction.
- Safety switch having a housing and a switching roller, which is mounted in a rotatable manner in the housing and serves for actuating a switching plunger and can be rotated through a predetermined angle by an actuator which can be introduced into the housing from the outside, according to Claim 1, characterized in that the curved section of the cam plate (6) which is located in the usable angle-of-rotation region of the switching roller (4) is designed - as seen in the actuating direction of rotation of the switching roller (4) - such that it slopes up continuously until just before the actuating end position is reached and slopes down following passage beyond an upper dead centre.
- Safety switch having a housing and a switching roller, which is mounted in a rotatable manner in the housing and serves for actuating a switching plunger and can be rotated through a predetermined angle by an actuator which can be introduced into the housing from the outside, according to Claim 2, characterized in that the curved section of the cam plate (6) which is located in the usable angle-of-rotation region of the switching roller (4) is designed - as seen in the actuating direction of rotation of the switching roller (4) - such that it slopes up continuously until the actuating end position has been reached.
- Safety switch having a housing and a switching roller, which is mounted in a rotatable manner in the housing and serves for actuating a switching plunger and can be rotated through a predetermined angle by an actuator which can be introduced into the housing from the outside, according to one or more of the preceding claims, characterized in that each cam plate (6) is pushed onto the swivel pin (11) of the switching roller (4) and secured in a rotationally fixed manner by a pin (9), which is firmly connected to the switching roller (4) and engages in a corresponding through-passage (10) of the cam plate (6).
- Safety switch having a housing and a switching roller, which is mounted in a rotatable manner in the housing and serves for actuating a switching plunger and can be rotated through a predetermined angle by an actuator which can be introduced into the housing from the outside, according to Claims 3-5, characterized in that each cam plate (6) can be connected to the switching roller (4) in two positions which are turned through 180°.
- Safety switch having a housing and a switching roller, which is mounted in a rotatable manner in the housing and serves for actuating a switching plunger and can be rotated through a predetermined angle by an actuator which can be introduced into the housing from the outside, according to one or more of the preceding claims, characterized in that the plunger (7) is provided with roof-like bevels in its abutment region which interacts with the outer edge (6a) of the cam plates (6).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29803028U DE29803028U1 (en) | 1998-02-20 | 1998-02-20 | Safety switch |
DE29803028U | 1998-02-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0938113A1 EP0938113A1 (en) | 1999-08-25 |
EP0938113B1 true EP0938113B1 (en) | 2003-02-05 |
Family
ID=8053015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99100233A Expired - Lifetime EP0938113B1 (en) | 1998-02-20 | 1999-01-08 | Safety switch |
Country Status (5)
Country | Link |
---|---|
US (1) | US5959270A (en) |
EP (1) | EP0938113B1 (en) |
DE (2) | DE29803028U1 (en) |
DK (1) | DK0938113T3 (en) |
ES (1) | ES2188043T3 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10106228A1 (en) * | 2001-02-10 | 2002-09-19 | Euchner Gmbh & Co | Safety switch with unlocking disc |
US6720508B2 (en) * | 2001-07-06 | 2004-04-13 | Omron Corporation | Door switches |
JP4522291B2 (en) * | 2005-03-08 | 2010-08-11 | Idec株式会社 | Safety switch |
JP4673661B2 (en) * | 2005-04-26 | 2011-04-20 | Idec株式会社 | Safety switch |
GB0515583D0 (en) * | 2005-07-29 | 2005-09-07 | Eja Ltd | Safety switch operating mechanism |
DE102006036514B3 (en) * | 2006-08-04 | 2008-01-10 | Moeller Gmbh | Safety switch device for locking protective device, has housing and locking slot, which is developed in housing for inserting actuating element for switch gear, where actuating element consists of lock provided with window |
US20080223012A1 (en) * | 2007-03-13 | 2008-09-18 | Black & Decker, Inc. | Cordless electric mower fail-safe charge lockout |
US9089723B2 (en) | 2012-02-06 | 2015-07-28 | Sapheco, LLC | Safety Protection apparatus for personnel on oil drilling derricks |
WO2018155335A1 (en) * | 2017-02-24 | 2018-08-30 | Idec株式会社 | Safety switch |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5464954A (en) * | 1992-08-31 | 1995-11-07 | Idec Izumi Corporation | Safety switch assembly |
DE4328297C1 (en) * | 1993-08-23 | 1995-02-23 | Euchner & Co | Safety switch |
DE4338910C1 (en) * | 1993-11-15 | 1995-02-16 | Bernstein Hans Spezialfabrik | Safety switch |
GB9326394D0 (en) * | 1993-12-24 | 1994-02-23 | Eja Eng Plc | Safety switch assemblies |
DE4408024C5 (en) * | 1994-03-10 | 2007-09-06 | Euchner Gmbh + Co. Kg | safety switch |
DE4436579C2 (en) * | 1994-10-13 | 1997-05-22 | Bernstein Hans Spezialfabrik | Safety switch |
FR2741993B1 (en) * | 1995-12-05 | 1998-01-16 | Schneider Electric Sa | ELECTRICAL KEY SAFETY SWITCH |
DE19602690C1 (en) * | 1996-01-26 | 1997-04-10 | Euchner & Co | Safety interlock switch e.g. for machine system safety door |
-
1998
- 1998-02-20 DE DE29803028U patent/DE29803028U1/en not_active Expired - Lifetime
-
1999
- 1999-01-08 DK DK99100233T patent/DK0938113T3/en active
- 1999-01-08 EP EP99100233A patent/EP0938113B1/en not_active Expired - Lifetime
- 1999-01-08 DE DE59904200T patent/DE59904200D1/en not_active Expired - Fee Related
- 1999-01-08 ES ES99100233T patent/ES2188043T3/en not_active Expired - Lifetime
- 1999-02-09 US US09/247,140 patent/US5959270A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2188043T3 (en) | 2003-06-16 |
DE29803028U1 (en) | 1998-04-09 |
DE59904200D1 (en) | 2003-03-13 |
US5959270A (en) | 1999-09-28 |
EP0938113A1 (en) | 1999-08-25 |
DK0938113T3 (en) | 2003-06-02 |
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