EP0666582B1 - Safety switch device enclosed in a casing - Google Patents
Safety switch device enclosed in a casing Download PDFInfo
- Publication number
- EP0666582B1 EP0666582B1 EP94119905A EP94119905A EP0666582B1 EP 0666582 B1 EP0666582 B1 EP 0666582B1 EP 94119905 A EP94119905 A EP 94119905A EP 94119905 A EP94119905 A EP 94119905A EP 0666582 B1 EP0666582 B1 EP 0666582B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switch
- locking
- safety switch
- locking lever
- switch device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- H01H27/007—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards the switch being lockable by remote control, e.g. by electromagnet
Definitions
- the present invention relates to a safety switching device enclosed by a housing according to the preamble of claim 1 (EP-A-0 553 883).
- these safety switching devices are designed so that they lock the protective devices until they stand still and there is no risk of injury when intervening.
- the protective device can only be opened when the key can be removed from the housing enclosing the safety switching device, the plunger then being displaced axially in such a way that it actuates the electrical switch, as a result of which the circuit of the machine motor is interrupted.
- electromagnetically actuated locking devices are known (EP 0 553 885, DE 38 10 287) with which the axial mobility is possible the plunger is blocked until one, for example the control interrogating the standstill of the machine signals a release, so that only in this case the locking device is disengaged and the plunger is movable. While moving it at the same time, the key can be removed and the protective device unlocked.
- a disadvantage of the known safety switching devices is that the arrangement of the locking device is not readily selectable, so that an adaptation to changed machine-side conditions that is sometimes necessary is not possible.
- the present invention is therefore based on the object of designing a safety switching device of the generic type in such a way that the placement of the locking device within the housing is freely selectable, depending on the requirement.
- the switch actuated by the switching wheel and the locking device can in principle be arranged at any point within an angular range of 360 °.
- the essence of the invention is that the switch is no longer actuated directly by the plunger, but practically via a deflection.
- the switch like the blocking device or a monitoring switch coupled to it, is transverse to the direction of movement the plunger can be arranged.
- An arrangement in which all three components mentioned are arranged laterally to the tappet is particularly space-saving.
- the locking device When the locking device is actuated, which, as mentioned, is carried out by an appropriately designed machine control, the monitoring switch is actuated simultaneously by the locking lever and a switch on the machine is interrupted.
- the switching wheel is locked by engaging the Locking lever, the locking lever being pivoted accordingly by the spring force of the locking device or by a spring bolt acting separately on the locking lever, the activation switch is released at the same time by actuating the monitoring switch.
- the monitoring switch remains in its interrupted position since the locking lever is not actuated.
- a safety switching device shown in the figures is enclosed by a housing 1 and can be actuated with a key 2 which can be inserted therein.
- the safety device consists of a plunger 3 which can be actuated by the key 2 and which is axially displaceably mounted, wherein in the operating positions shown in FIGS. 1, 3 and 4 it engages in the key 2 in a manner known per se, that is to say assumes an uppermost position .
- the plunger 3 in the exemplary embodiments shown in FIGS. 1 to 3 is provided with a pin 14 which is guided in an elongated hole 15 of a cam disk 5 which forms a ratchet wheel and is pivotably mounted on a shaft 17 .
- the tappet 3 is moved up or down in accordance with the rotational movement of the cam disk 5.
- a switch 4 Transverse to the plunger 3, a switch 4 is arranged, with which a machine motor (not shown) can be switched on or off, a switching element 13 of the switch 4 engaging in a curved recess in the cam disk 5 and likewise being moved axially during its pivoting movement, so that each after the position of the cam disc 5 and after the position of the tappet 3 the machine motor is switched on or off.
- the cam disc 5 is further provided with a nose 10 into which a a pivoting blocking hook 9 engages a locking lever 8.
- the locking lever 8 is mounted on a pivot axis 11, around which it can be pivoted.
- a monitoring switch 7 is arranged on the locking lever 8, the switching pin of which carries out a parallel, but opposite, lifting movement to the lifting movement of the locking device 6.
- the lock can be released via an emergency release in the form of a cam 16 coupled to the locking device 6, although this requires a special tool that is not accessible to everyone.
- the locking device 6 is connected in the region to the locking lever 8 which is assigned to the cam disk 5.
- the safety switching device In a position corresponding to FIG. 1, which results when the machine motor is in the switched-on operating state, the safety switching device is released as a whole and consequently access to machine parts previously protected by protective devices by energizing the electromagnetically actuated locking device 6, in which the connected locking lever 8 in Direction of the locking device 6 is moved.
- the excitation command is issued by a machine controller that monitors the run-on time of the machine parts.
- the plunger 3 By releasing the locking lever 8 from its blocking position, the plunger 3 can be moved freely, so that the key 2 can be pulled out of the housing. Because of this, which inevitably takes place in a known manner Axial displacement of the plunger 3, the cam disc is pivoted so that it actuates the switching element 13 by means of the curved recess 12 such that the switch 4 interrupts the electrical line to the machine motor. An unintentional switch-on of the machine with the protective devices open is therefore excluded.
- FIG. 2 This position can be seen in FIG. 2.
- the locking lever 8 is pivoted out or the locking device 6 is tightened by the electromagnet, the switching pin 18 of the monitoring switch 7 is pulled out.
- a connected, not shown switch on the machine is interrupted. If a malfunction of the locking device 6 now occurs, for example due to a break in a spring with which the locking lever 8 is pivoted into the locking position according to FIG. 1 after the electromagnet has been switched off, so that the locking lever 8 remains in its position shown in FIG. 2 , the monitoring switch 7 also remains in this position in which the switch is interrupted. It is not possible to start up the machine without repairing the damage, which represents a significant safety improvement.
- FIG. 4 Such an embodiment variant is shown in FIG. 4. Both the locking device 6 and the monitoring switch 7 and the switch 4 are arranged laterally to the plunger 3, so that the direction of movement of their switching elements is transverse to that of the plunger 3.
- the monitoring switch 7 is arranged here on the switch 4, which means a particularly space-saving design.
- the ratchet wheel is designed in the form of a camshaft 19, on which a crank 20 is articulated, which is connected to the switching element 13 of the switch 4, so that the camshaft 19 is rotated accordingly, depending on the tappet movement, of the switch 4.
- the tappet 3 is connected in an articulated manner to the camshaft 19, with a deflection caused by the rotational movement being readily accepted.
- a spring bolt 21 is provided which is supported on an arm of the locking lever 8 and presses the hook 9 into the camshaft 19 in such a way that the nose 10 is securely engaged.
- an electromagnetically actuated locking device can be used which is not spring-loaded in the excited or de-energized position. This means that a very simple embodiment of a magnetic switch can be used, which then does not have to have a spring.
Description
Die vorliegende Erfindung betrifft eine durch ein Gehäuse umschlossene Sicherheitsschaltvorrichtung gemäß dem Oberbegriff des Anspruches 1 (EP-A-0 553 883).The present invention relates to a safety switching device enclosed by a housing according to the preamble of claim 1 (EP-A-0 553 883).
Entsprechend den einschlägigen Vorschriften müssen derartige Sicherheitsschaltvorrichtungen dort eingesetzt werden, wo die Gefahr besteht, daß Schutzeinrichtungen von Maschinen während ihres Betriebs geöffnet werden können.According to the relevant regulations, such safety switching devices must be used where there is a risk that protective devices of machines can be opened during their operation.
Um dies zu verhindern, sind diese Sicherheitsschaltvorrichtungen so ausgebildet, daß sie die Schutzeinrichtungen so lange verriegeln, bis diese stillstehen und eine Verletzungsgefahr beim Eingreifen ausgeschlossen ist.To prevent this, these safety switching devices are designed so that they lock the protective devices until they stand still and there is no risk of injury when intervening.
Dabei läßt sich die Schutzeinreichtung erst dann öffnen, wenn der Schlüssel aus dem die Sicherheitsschaltvorrichtung umschließenden Gehäuse herausgezogen werden kannn, wobei dann der Stößel derart axial verschoben wird, daß er den elektrischen Schalter betätigt, wodurch der Stromkreis des Maschinenmotors unterbrochen wird.The protective device can only be opened when the key can be removed from the housing enclosing the safety switching device, the plunger then being displaced axially in such a way that it actuates the electrical switch, as a result of which the circuit of the machine motor is interrupted.
Um insbesondere zu verhindern, daß ein Entriegeln der Schutzeinrichtung möglich ist, wenn die Maschine noch nachläuft, was ja ebenfalls eine erhebliche Gefährdung mit sich bringt, sind elektromagnetisch betätigbare Sperreinrichtungen bekannt (EP 0 553 885, DE 38 10 287) mit denen die axiale Bewegbarkeit des Stößels solange blockiert ist, bis eine beispielsweise den Stillstand der Maschine abfragende Steuerung eine Freigabe signalisiert, so daß erst in diesem Fall die Sperreinrichtung außer Eingriff gebracht und der Stößel bewegbar ist. Unter dessen gleichzeitigem Verschieben kann der Schlüssel abgezogen und die Schutzeinrichtung entriegelt werden.In order to prevent, in particular, that the protective device can be unlocked when the machine is still running, which also poses a considerable risk, electromagnetically actuated locking devices are known (EP 0 553 885, DE 38 10 287) with which the axial mobility is possible the plunger is blocked until one, for example the control interrogating the standstill of the machine signals a release, so that only in this case the locking device is disengaged and the plunger is movable. While moving it at the same time, the key can be removed and the protective device unlocked.
Nachteilig bei den bekannten Sicherheitsschaltvorrichtungen ist, daß die Anordnung der Sperreinrichtung nicht ohne weiteres frei wählbar ist, so daß eine mitunter notwendige Anpassung an veränderte maschinenseitige Gegebenheiten nicht möglich ist.A disadvantage of the known safety switching devices is that the arrangement of the locking device is not readily selectable, so that an adaptation to changed machine-side conditions that is sometimes necessary is not possible.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Sicherheitsschaltvorrichtung der gattungsgemäßen Art so zu gestalten, daß die Plazierung der Sperreinrichtung innerhalb des Gehäuses, je nach Anforderung, frei wählbar ist.The present invention is therefore based on the object of designing a safety switching device of the generic type in such a way that the placement of the locking device within the housing is freely selectable, depending on the requirement.
Diese Aufgabe wird durch eine Sicherheitsschaltvorrichtung gelöst, die die Merkmale des kennzeichnenden Teiles des Anspruches 1 aufweist.This object is achieved by a safety switching device which has the features of the characterizing part of
Durch diese konstruktive Ausgestaltung kann der vom Schaltrad betätigte Schalter ebenso wie die Sperreinrichtung prinzipiell an jeder Stelle innerhalb eines Winkelbereichs von 360° angeordnet werden.As a result of this design, the switch actuated by the switching wheel and the locking device can in principle be arranged at any point within an angular range of 360 °.
Das Wesen der Erfindung liegt darin, daß der Schalter nicht mehr unmittelbar vom Stößel betätigt wird, sondern praktisch über eine Umlenkung. Dies bedeutet, daß der Schalter ebenso wie die Sperreinrichtung oder ein damit gekoppelter Überwachungsschalter quer zur Bewegungsrichtung des Stößels angeordnet sein können.
Besonders platzsparend stellt sich eine Anordnung dar, bei der alle drei genannten Bauteile seitlich zum Stößel angeordnet sind.The essence of the invention is that the switch is no longer actuated directly by the plunger, but practically via a deflection. This means that the switch, like the blocking device or a monitoring switch coupled to it, is transverse to the direction of movement the plunger can be arranged.
An arrangement in which all three components mentioned are arranged laterally to the tappet is particularly space-saving.
Bei Betätigung der Sperreinrichtung, die, wie erwähnt, durch eine entsprechend ausgelegte Maschinensteuerung erfolgt, wird gleichzeitig durch den Sperrhebel der Überwachungsschalter betätigt und ein maschinenseitiger Einschalter unterbrochen.When the locking device is actuated, which, as mentioned, is carried out by an appropriately designed machine control, the monitoring switch is actuated simultaneously by the locking lever and a switch on the machine is interrupted.
Im Regelfall, wenn die maschinenseitige Schutzeinrichtung wieder Funktionsstellung und der Schlüssel in das Gehäuse eingesteckt ist, so daß durch ein axiales Verschieben des Stößels in Richtung des Schlüssels und gleichzeitiges Verschwenken des Schaltrades ein Einschalten des Schalters möglich ist, erfolgt eine Verrastung des Schaltrades durch Einrücken des Sperrhebels, wobei der Sperrhebel durch die Federkraft der Sperreinrichtung oder durch ein separat auf den Sperrhebel einwirkenden Federbolzen entsprechend verschwenkt wird, erfolgt gleichzeitig durch Betätigung des Überwachungsschalters eine Freigabe des Einschalters.
Im Fall einer Funktionsstörung, beispielsweise durch einen Bruch der Feder der Sperreinrichtung oder des Federbolzens, bleibt der Überwachungsschalter in seiner Unterbrechungsposition, da der Sperrhebel nicht betätigt wird.As a rule, when the machine-side protective device is again in the functional position and the key is inserted into the housing so that the switch can be switched on by axially moving the plunger in the direction of the key and simultaneously pivoting the switching wheel, the switching wheel is locked by engaging the Locking lever, the locking lever being pivoted accordingly by the spring force of the locking device or by a spring bolt acting separately on the locking lever, the activation switch is released at the same time by actuating the monitoring switch.
In the event of a malfunction, for example due to a break in the spring of the locking device or the spring bolt, the monitoring switch remains in its interrupted position since the locking lever is not actuated.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the subclaims.
Ausführungsbespiele der Erfindung werden nachfolgend anhand der beigefügten Zeichnungen beschrieben.Embodiments of the invention are described below with reference to the accompanying drawings.
Es zeigen:
- Fig. 1 und 2
- eine Sicherheitsschaltvorrichtung in verschiedenen Funktionsstellungen jeweils in einer schematisierten Seitenansicht dargestellt,
- Fig. 3 und 4
- jeweils ein weiteres Ausführungsbeispiel einer Sicherheitsvorrichtung gleichfalls in einer schematisierten Seitenansicht gezeigt.
- 1 and 2
- a safety switching device in different functional positions, each in a schematic side view illustrated
- 3 and 4
- Another embodiment of a safety device is also shown in a schematic side view.
Eine in den Figuren gezeigte Sicherheitsschaltvorrichtung ist durch ein Gehäuse 1 umschlossen und mit einem in dieses einführbaren Schlüssel 2 betätigbar.A safety switching device shown in the figures is enclosed by a
Bei der in den Fig. 1 3 und 4 gezeigten Stellung des Schlüssels 2, in der dieser in das Gehäuse 1 eingesteckt ist, ist die Maschine, mit der die Sicherheitsschaltvorrichtung gekoppelt ist, betriebsbereit.In the position of the
Die Sicherheitsvorrichtung besteht aus einem durch den Schlüssel 2 betätigbaren Stößel 3, der axial verschiebbar gelagert ist, wobei er bei den in den Fig. 1, 3 und 4 gezeigten Betriebspositionen in an sich bekannter Weise in den Schlüssel 2 eingreift, also eine oberste Stellung einnimmt.The safety device consists of a
An seinem dem Schlüssel 2 abgewandten Ende ist der Stößel 3 bei den in den Fig. 1 bis 3 gezeigten Ausführungsbeispielen mit einem Zapfen 14 versehen, der in einem Langloch 15 einer ein Schaltrad bildenden Nockenscheibe 5 geführt ist, die schwenkbar auf einer Welle 17 gelagert ist. Entsprechend der Drehbewegung der Nockenscheibe 5 wird der Stößel 3 auf- oder abbewegt.At its end facing away from the
Quer zum Stößel 3 verlaufend ist ein Schalter 4 angeordnet, mit dem ein nicht dargestellter Maschinenmotor ein- oder ausschaltbar ist, wobei ein Schaltglied 13 des Schalters 4 in eine kurvenartige Ausnehmung der Nockenscheibe 5 eingreift und gleichfalls bei deren Schwenkbewegung axial bewegt wird, so daß je nach Stellung der Nockenscheibe 5 und nach Stellung des Stößels 3 der Maschinenmotor ein- oder ausgeschaltet ist.Transverse to the
Die Nockenscheibe 5 ist weiter mit einer Nase 10 versehen, in die ein eine Schwenkbewegung blockierender Haken 9 eines Sperrhebels 8 eingreift.The
Diese wird durch eine elektromagnetisch betätigbare Sperreinrichtung 7 bewegt, deren Hubbewegung bei den gezeigten Ausführungsbeispielen nach den Fig. 1 bis 3 gleichgerichtet zur Hubbewegung des Stößels 3 erfolgt.This is moved by an electromagnetically actuated
Der Sperrhebel 8 ist an einer Schwenkachse 11 gelagert, um die herum er schwenkbar ist. An dem der Sperreinrichtung 6 gegenüberliegenden Ende ist an dem Sperrhebel 8 ein Überwachungsschalter 7 angeordnet, dessen Schaltbolzen eine zwar parallele, jedoch gegengerichtete Hubbewegung zur Hubbewegung der Sperreinrichtung 6 vollführt.The
Über eine mit der Sperreinrichtung 6 gekoppelte Notentriegelung in Form eines Nockens 16 kann im Bedarfsall die Verriegelung gelöst werden, wobei hierzu jedoch ein spezielles, nicht für jedermann zugängliches Werkzeug erforderlich ist.If necessary, the lock can be released via an emergency release in the form of a
Bei dem in den Fig. 1 und 2 gezeigten Ausführungsbeispiel ist die Sperreinrichtung 6 in dem Bereich an dem Sperrhebel 8 angeschlossen, der der Nockenscheibe 5 zugeordnet ist.In the exemplary embodiment shown in FIGS. 1 and 2, the
Bei einer Stellung entsprechend der Fig. 1, die sich beim eingeschalteten Betriebszustand des Maschinenmotors ergibt, erfolgt ein Lösen der Sicheheitsschaltvorrichtung insgesamt und ein dadurch bedingter Zugriff auf zuvor durch Schutzeinrichtungen geschützte Maschinenteile durch Erregung der elektromagnetisch betätigbaren Sperreinrichtung 6, bei der der angeschlossene Sperrhebel 8 in Richtung der Sperreinrichtung 6 bewegt wird. Der Erregungsbefehl wird von einer Maschinensteuerung gegeben, die die Nachlaufzeit der Maschinenteile überwacht.In a position corresponding to FIG. 1, which results when the machine motor is in the switched-on operating state, the safety switching device is released as a whole and consequently access to machine parts previously protected by protective devices by energizing the electromagnetically actuated
Durch Lösen des Sperrhebels 8 aus ihrer Blockierposition ist der Stößel 3 frei verschiebbar, so daß der Schlüssel 2 aus dem Gehäuse herausgezogen werden kann. Durch die dabei in bekannter Weise zwangsweise erfolgende axiale Verschiebung des Stößels 3 wird die Nockenscheibe so verschwenkt, daß sie das Schaltglied 13 mittels der kurvenförmigen Ausnehmung 12 derart betätigt, daß der Schalter 4 die elektrische Leitung zu dem Maschinenmotor unterbricht.
Ein unbeabsichtigtes Einschalten der Maschine bei geöffneten Schutzeinrichtungen ist somit ausgeschlossen.By releasing the
An unintentional switch-on of the machine with the protective devices open is therefore excluded.
Diese Stellung ist in der Fig. 2 erkennbar.
Dort ist auch zu sehen, daß mit dem Herausschwenken des Sperrhebels 8 bzw. dem Anziehen der Sperreinrichtung 6 durch den Elektromagneten ein Herausziehen des Schaltbolzens 18 des Überwachungsschalters 7 einhergeht. Damit wird ein angeschlossener, nicht dargestellter Einschalter der Maschine unterbrochen.
Sollte nun eine Funktionsstörung der Sperreinrichtung 6 auftreten, beispielsweise durch einen Bruch einer Feder, mit der der Sperrhebel 8 nach Abschalten des Elektromagneten in die Sperrposition gemäß Fig. 1 verschwenkt wird, so daß der Sperrhebel 8 in seiner in der Fig. 2 gezeigten Position verharrt, verbleibt auch der Überwachungsschalter 7 in dieser Position, in der der Einschalter unterbrochen ist. Ein Inbetriebsetzen der Maschine ist ohne Behebung des Schadens nicht möglich, was eine erhebliche Sicherheitsverbesserung darstellt.This position can be seen in FIG. 2.
There it can also be seen that when the
If a malfunction of the
Während die Magnetspule der Sperreinrichtung bei dem Ausführungsbeispiel nach den Fig. 1 und 2 dann unter Strom steht, wenn die Schutzeinrichtung der Maschine geöffnet ist, ist bei dem Ausführungsbeispiel gemäß der Fig. 3 die Magnetspule dann unter Strom, wenn die Schutzeinrichtung geschlossen ist.
Hierbei ist allerdings die Sperreinrichtung 6 an der dem Haken 9 abgewandten Ende des Sperrhebels 8 angeschlossen, während der Überwachungsschalter 7 an dem gegenüberliegenden Endbereich, also dem dem Haken 9 zugewandten, befestigt.
Diese Ausführungsvariante bietet dann erhebliche Vorteile, wenn bei kurzen Arbeitstakten lange Öffnungszeiten der Schutzeinrichtung notwendig sind. Eine zu starke Erwärmung der Magnetspule durch eine länger andauernde Erregung kann somit nicht eintreten.1 and 2 is under current when the protective device of the machine is open, in the exemplary embodiment according to FIG. 3 the magnetic coil is under current when the protective device is closed.
Here, however, the
This design variant offers considerable advantages if long opening times of the protective device are necessary for short work cycles. Excessive heating of the magnetic coil due to a longer period permanent excitement cannot occur.
Anstelle der in den Fig. 1 bis 3 gezeigten Anordnung des Schalters 4 und/oder des Überwachungsschalters 6 und der Sperreinrichtung 7 sind auch andere Plazierungen innerhalb des Gehäuses 1 denkbar, die eine optimale Raumausnutzung mit sich bringen.Instead of the arrangement of the
Eine solche Ausführungsvariante ist in der Fig. 4 gezeigt.
Dabei sind sowohl die Sperrinrichtung 6 als auch der Überwachungsschalter 7 und der Schalter 4 seitlich zum Stößel 3 angeordnet, so daß die Bewegungsrichtung ihrer Schaltorgane quer zu der des Stößels 3 verläuft.Such an embodiment variant is shown in FIG. 4.
Both the
Der Überwachungsschalter 7 ist hier auf dem Schalter 4 angeordnet, was eine besonders platzsparende Bauweise bedeutet. Das Schaltrad ist in Form einer Nockenwelle 19 ausgebildet, an der eine Kurbel 20 gelenkig festgelegt ist, die mit dem Schaltglied 13 des Schalters 4 verbunden ist, so daß entsprechender, stößelbewegungabhängiger Drehung der Nockenwelle 19 der Schalter 4 betätigt wird.The
Der Stößel 3 ist gelenkig an der Nockenwelle 19 angeschlossen, wobei eine drehbewegungsbedingte Auslenkung ohne weiteres in Kauf genommen werden kann.The
Um ein sicheres Einrasten des Sperrhebels 8 in die Nockenwelle 19 zu gewährleisten, ist ein Federbolzen 21 vorgesehen, der sich an einem Arm des Sperrhebels 8 abstützt und den Haken 9 so in die Nockenwelle 19 eindrückt, daß die Nase 10 mit Sicherheit hintergriffen wird.In order to ensure that the
Durch den Einsatz des Federbolzens 21 kann eine elektromagnetisch betä tigbare Sperreinrichtung zum Einsatz kommen, die nicht in er- oder entregter Stellung federbelastet ist. Das heißt, es ist eine sehr einfache Ausführungsform eines Magnetschalters einsetzbar, der dann keine Feder aufweisen muß.By using the
- 11
- Gehäusecasing
- 22nd
- Schlüsselkey
- 33rd
- StößelPestle
- 44th
- Schaltercounter
- 55
- NockenscheibeCam disc
- 66
- SperreinrichtungLocking device
- 77
- ÜberachungsschalterSurveillance switch
- 88th
- SperrhebelLocking lever
- 99
- Hakenhook
- 1010th
- Nasenose
- 1111
- SchwenkachseSwivel axis
- 1212th
- AusnehmungRecess
- 1313
- SchaltgliedSwitching element
- 1414
- ZapfenCones
- 1515
- LanglochLong hole
- 1616
- Nockencam
- 1717th
- Wellewave
- 1818th
- SchaltbolzenShift pin
- 1919th
- Nockenwellecamshaft
- 2020th
- Kurbelcrank
- 2121
- FederbolzenSpring bolt
Claims (12)
- A safety switch device enclosed by a housing (1), having a push rod (3) which can be actuated by means of a key (2) that can be introduced into the housing (1) and which is mounted axially displaceably on its longitudinal axis and which is operatively connected to an electric switch (4) for interrupting a machine motor, in such a way that the switch (4) is switched on or off depending on the respective position of the push rod (3), and having an electromagnetically actuable locking device (6), wherein the key (2) can be pulled out of the housing (1) only after excitation of the locking device (6) because the locking device (6) blocks a switching wheel (5, 19) and the push rod (3) which is pivotably mounted thereto, characterised in that the switching wheel (5, 19) is movable by the push rod (3) and can be fixed by means of a locking lever (8) connected to the locking device (6), and that the switch (4) is actuable by the switching wheel (5, 19), wherein the locking lever (8) and the switch (4) are directly connected to the switching wheel (5, 19).
- A safety switch device according to claim 1 characterised in that the switching wheel is in the form of a cam disc (5) or cam shaft (19).
- A safety switch device according to claim 1 characterised in that a monitoring switch (7) electrically connected to an on switch on the machine is arranged at the end of the locking lever (8), which is opposite to the locking device (6), wherein the locking lever is pivotably secured to a pivot axis (11) fixed between the monitoring switch (7) and the locking device (6).
- A safety switch device according to claim 1 characterised in that the locking lever (8) has a hook (9) which engages behind a projection (10) of the switching wheel in the locking position.
- A safety switch device according to claim 2 characterised in that the push rod is provided in its end remote from the key (2) with a projection (14) which is guided in a slot (15) in the cam disc (5).
- A safety switch device according to claim 2 characterised in that the switching member (13) of the switch (4) lies in a curve-like opening (12) in the cam disc (5).
- A safety switch device according to claim 3 characterised in that the switch (4) and/or the monitoring switch (7) and/or the locking device (6) are arranged to extend transversely to the longitudinal axis of the push rod (3).
- A safety switch device according to claim 4 characterised in that the locking device (6) is connected in the region of the locking lever (8), which is adjacent to the hook (9).
- A safety switch device according to claim 4 characterised in that the locking device is connected in the end region of the locking lever (8), which is remote from the hook (9).
- A safety switch device according to claim 1 characterised in that the switch (4) is connected to the switching wheel by a crank (20).
- A safety switch device according to one of claims 3 or 7 characterised in that the monitoring switch (7) and the switch (4) are connected together one upon the other.
- A safety switch device according to claim 1 characterised in that there is provided a spring pin (21) with which the locking lever (8) can be pressed into the switching wheel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4403061 | 1994-02-02 | ||
| DE4403061A DE4403061C1 (en) | 1994-02-02 | 1994-02-02 | Safety switching device enclosed by a housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0666582A1 EP0666582A1 (en) | 1995-08-09 |
| EP0666582B1 true EP0666582B1 (en) | 1997-09-17 |
Family
ID=6509226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94119905A Expired - Lifetime EP0666582B1 (en) | 1994-02-02 | 1994-12-16 | Safety switch device enclosed in a casing |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5584378A (en) |
| EP (1) | EP0666582B1 (en) |
| DE (1) | DE4403061C1 (en) |
| ES (1) | ES2107110T3 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4328297C1 (en) * | 1993-08-23 | 1995-02-23 | Euchner & Co | Safety switch |
| FR2750791B1 (en) * | 1996-07-02 | 1998-10-09 | Schneider Electric Sa | ELECTRIC MAGNET LOCKABLE SAFETY SWITCH |
| FR2751122B1 (en) * | 1996-07-09 | 1998-09-11 | Schneider Electric Sa | SAFETY SWITCH WITH LOCKABLE ACTUATOR |
| US6283514B1 (en) * | 1996-08-16 | 2001-09-04 | K. A. Schmersal Gmbh & Co. | Apparatus for monitoring and controlling access to a restricted area |
| US6539760B1 (en) * | 1999-05-24 | 2003-04-01 | K.A. Schmersal Gmbh & Co. | Monitoring device |
| US6944774B2 (en) | 1999-06-18 | 2005-09-13 | Zoom Telephonics, Inc. | Data flow control unit |
| SE521570C2 (en) * | 1999-09-10 | 2003-11-11 | Abb Ab | Methods and devices for interlocking |
| JP3982143B2 (en) * | 2000-03-15 | 2007-09-26 | オムロン株式会社 | Lock switch device |
| US6515239B2 (en) | 2001-02-23 | 2003-02-04 | Gregory Brian Marchant | Motivational apparatus for controlling use of electronic devices and method of use |
| CN1333317C (en) * | 2003-02-13 | 2007-08-22 | 神达电脑股份有限公司 | Privacy device |
| FR2862810B1 (en) * | 2003-11-21 | 2006-01-06 | Schneider Electric Ind Sas | SAFETY POSITION SWITCH |
| TWI253369B (en) * | 2005-01-14 | 2006-04-21 | Univ Nat Taiwan | A safety apparatus for preventing industrial safety problems of machine tools caused by device-loading gears |
| JP4673661B2 (en) * | 2005-04-26 | 2011-04-20 | Ｉｄｅｃ株式会社 | Safety switch |
| ATE483243T1 (en) * | 2006-07-03 | 2010-10-15 | Siemens Ag | POSITION SWITCH |
| US7429708B1 (en) * | 2007-06-22 | 2008-09-30 | Eja, Limited | Safety switch |
| CN102881512B (en) * | 2012-09-24 | 2015-10-14 | 无锡市新一代电力电器有限公司 | There is the manual rapid closing breaker mechanism of trip free function |
| DE202020100575U1 (en) | 2020-02-03 | 2021-05-05 | Steute Technologies Gmbh & Co. Kg | Safety interlock |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3100862C2 (en) * | 1981-01-14 | 1984-02-09 | K.A. Schmersal Gmbh & Co, 5600 Wuppertal | Safety switch |
| DE3112097C2 (en) * | 1981-03-27 | 1990-03-29 | Euchner & Co, 7022 Leinfelden-Echterdingen | "Safety switch" |
| DE3309372A1 (en) * | 1983-03-16 | 1984-09-27 | Hans & Jos. Kronenberg Gmbh, 5060 Bergisch Gladbach | Safety switch |
| DE3330109C2 (en) * | 1983-08-20 | 1986-01-02 | K.A. Schmersal Gmbh & Co, 5600 Wuppertal | Electric switch |
| ATE39991T1 (en) * | 1984-08-16 | 1989-01-15 | Letzel Helmut | SAFETY LOCKING DEVICE ON GUARDS TO PREVENT INTERVENTION IN HAZARDOUS SPACES. |
| DE3430090A1 (en) * | 1984-08-16 | 1986-03-06 | Euchner & Co, 7022 Leinfelden-Echterdingen | Safety switch |
| FR2613121B1 (en) * | 1987-03-27 | 1993-12-10 | Telemecanique Electrique | KEY SWITCH LOCKABLE BY ACTUATOR |
| DE69320840T3 (en) * | 1992-01-31 | 2004-07-22 | Omron Corp. | safety switch |
-
1994
- 1994-02-02 DE DE4403061A patent/DE4403061C1/en not_active Expired - Fee Related
- 1994-12-16 ES ES94119905T patent/ES2107110T3/en not_active Expired - Lifetime
- 1994-12-16 EP EP94119905A patent/EP0666582B1/en not_active Expired - Lifetime
-
1995
- 1995-01-30 US US08/380,022 patent/US5584378A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0666582A1 (en) | 1995-08-09 |
| ES2107110T3 (en) | 1997-11-16 |
| DE4403061C1 (en) | 1995-06-22 |
| US5584378A (en) | 1996-12-17 |
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