EP0871189A1 - Safety switch - Google Patents

Safety switch Download PDF

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Publication number
EP0871189A1
EP0871189A1 EP97120918A EP97120918A EP0871189A1 EP 0871189 A1 EP0871189 A1 EP 0871189A1 EP 97120918 A EP97120918 A EP 97120918A EP 97120918 A EP97120918 A EP 97120918A EP 0871189 A1 EP0871189 A1 EP 0871189A1
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EP
European Patent Office
Prior art keywords
locking pin
safety switch
switch according
holding
rocker arm
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
EP97120918A
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German (de)
French (fr)
Other versions
EP0871189B1 (en
Inventor
Rolf Dipl.-Ing. Wecke
Heinz Dipl.-Ing. Scharlibbe
Dirk Dipl.-Ing. Dreyer
Joachim Dipl.-Ing. Ulfik
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Bernstein AG
Original Assignee
Hans Bernstein Spezialfabrik fur Schaltkontakte & Co GmbH
Hans Bernstein Spezialfabrik fur Schaltkontakte and Co GmbH
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Application filed by Hans Bernstein Spezialfabrik fur Schaltkontakte & Co GmbH, Hans Bernstein Spezialfabrik fur Schaltkontakte and Co GmbH filed Critical Hans Bernstein Spezialfabrik fur Schaltkontakte & Co GmbH
Publication of EP0871189A1 publication Critical patent/EP0871189A1/en
Application granted granted Critical
Publication of EP0871189B1 publication Critical patent/EP0871189B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 invention relates to a safety switch with a in a switch housing axially displaceably mounted, spring-loaded locking pin, which in a the switching element by means of a solenoid against the spring force releasing position is movable.
  • Such safety switches are known in many embodiments.
  • the basic requirement is that they must be designed so that when pulled out Actuator is also forced to the off position. This is done by a compression spring acting on the locking pin, which in the locking pin the blocking position presses.
  • the solenoid is excited so that its armature counter the action of the compression spring is moved and thereby the locking pin in the release position moves.
  • the invention has for its object a safety switch of the beginning to be described in a constructively simple manner so that the Energy requirement for holding the locking pin in the release position is significantly reduced becomes.
  • the task is performed by a holding the plunger in its release position Holding magnets released so that the lifting magnet is de-energized in this position.
  • the function is achieved by lifting work to be carried out by the lifting magnet and divided into a holding work to be performed by the holding magnet.
  • the magnet has a significantly lower current consumption than the solenoid, since it only has the must have low holding force. To ensure that it functions properly, the holding magnet is energized before the lifting magnet is switched off. It follows accordingly an overlap.
  • the armature of the solenoid and the Anchor of the holding magnet at one end of a transverse to the locking pin Rocker arms are articulated, the opposite end on a stationary Axis is pivotally mounted and with the locking pin in a driving connection stands.
  • the solenoid When the solenoid is excited, the armature of the holding magnet follows the Movement of the armature of the solenoid, because of the linkage to the rocker arm a forced coupling takes place. This ensures that the rocker arm in the Position remains as soon as the holding magnet is excited.
  • the armature of the lifting magnet is held by the holding magnet in the release position of the locking bolt.
  • a structurally simple design is achieved when a Traverse is firmly attached, against which one end of the locking pin in supports the blocking position holding compression spring, and that the other, the switching element facing side is in contact with the rocker arm.
  • the inner part could for example be a rib or transverse to the locking pin be a partition. Securing the locking bolt against rotation is the simplest Given if preferably both ends of the traverse in elongated holes of plates, for example printed circuit boards, the elongated holes in the direction of the locking pin. These circuit boards are a short distance apart to two parallel walls of the switch housing.
  • the crossmember is expediently located in the central region of the rocker arm. Thereby the balance of power is favorable because the rocker arm is like a one-armed lever works.
  • the armatures of the lifting and holding magnets are then at a distance from Locking pin. Since also the distance of the lifting and holding magnets to Swivel axis of the rocker arm is greater than the distance of the crossbar to Swivel axis, is the stroke of the armature of the solenoid and the armature of the Holding magnets larger than the displacement of the locking pin.
  • the displacement route the locking bolt is designed, however, that then the switching element, for example the ratchet wheel can be turned. This normally becomes the locking pin the difference between the stroke of the armature of the solenoid and the Displacement of the locking pin shifted so that the displacement is the same is big as the stroke.
  • the safety switches in question are used in the different installation positions. This now ensures that the anchor of the solenoid in the non-excited state into the position automatically and unintentionally falls back, in which the locking pin is in the blocking position, it is provided that on the locking pin a transverse bridge member is firmly placed, and that the armature of the solenoid with the end region facing away from the rocker arm is slidably guided in the bridge member. This can cause excitement of the lifting magnet of the armature relative to the locking pin, it will move however, prevents him from being in his currentless state Starting position falls back before the locking pin moves back into the blocking position becomes.
  • the safety switch can be used for a wide variety of voltages is, it is provided that the power supply to the solenoid and the holding magnet a switching regulator with pulse width modulator. This makes an all-current version created without voltage variants, so that despite the different Voltages of the safety switch can be used internationally. So that no additional Coils are required for voltage regulation, it is provided that the inductances of the working coils of the solenoid and the holding magnet as smoothing inductance are designed.
  • the safety switch 10 has an unspecified one Switch housing 11, on the end face of which an attachment 12 is flanged, in which a ratchet 13 is rotatably mounted as a switching element.
  • the attachment 12 is with an opening 28, for example by means of a radius actuator, not shown to turn the ratchet wheel 13.
  • a Locking pin 14 slidably mounted in the middle of the switch housing 10 in the middle of the switch housing 10 in the middle of the switch housing 10 .
  • the direction of displacement is in the axial or in the longitudinal direction of the locking pin 14.
  • the locking pin 14 is at one end led out of the switch housing 11 and engages in that shown in FIGS. 1 and 2 Locked position in a corresponding recess of the ratchet 13.
  • the other end of the locking pin 14 is guided in a tubular extension 15, which is formed on an intermediate wall of the switch housing 11.
  • a rocker arm 16 designed in the manner of a one-armed lever on one stationary axis 17 pivotally mounted.
  • the rocker arm 16 To the opposite end of the The rocker arm 16 is the armature 18 of a lifting magnet 19 and the armature 20 of a holding magnet 21 articulated.
  • a cross member 22 is firmly attached to the rocker arm 16 is in contact.
  • the crossmember 22 is laterally next to the rocker arm 16 or below, depending on the installation position, on the side facing away from the switching wheel 13 lies.
  • One end of the locking bolt is supported against this crossmember 22 14 encompassing compression spring 23.
  • This compression spring lies on the rocker arm 16 opposite side. The other end rests on a fixed part of the Switch housing 11 from. This can be, for example, a web or an intermediate wall Be 24.
  • the locking pin 14 penetrates this partition 24.
  • a bridge member 25 is also firmly attached. This bridge link is on the side of the intermediate wall 24 which is remote from the compression spring 23.
  • the lifting magnet 19 is first excited, so that the armature 18 is attracted and the rocker arm 16 by a relative is pivoted small angle, as indicated by the dash-dotted line 16 ' is (Fig. 1).
  • the displacement of the locking pin 14 is less than the stroke of the armature 18 of the lifting magnet 19.
  • the displacement of the locking pin 14 is so large that the ratchet wheel can be rotated, causing the displacement path is then the same or approximately the same as the stroke of the armature 18.
  • the anchor 18 in in all installation positions this position remains when the solenoid 19 is no longer energized.
  • the holding magnet 21 is excited so that the Locking bolt 14 remains in the release position. After the holding magnet 21 is no longer excited, the compression spring 23 moves the locking pin 14 in the Blocking position.
  • Fig. 2 shows that the holding magnet 21 by means of a bolt connection on the circuit board 27 is set.

Abstract

A safety switch includes a spring-biased locking pin which is displaceable axially inside a switch housing by a lifting magnet against the biasing force of the spring to switch a switching element between a blocking position and a release position, and a retention magnet which holds the locking pin in the release position when the lifting magnet is de-energized.

Description

Die Erfindung betrifft einen Sicherheitsschalter mit einem in einem Schaltergehäuse axial verschiebbar gelagerten, federbelasteten Sperrbolzen, der in eine das Schaltelement mittels eines Hubmagneten entgegen der Federkraft freigebende Stellung verschiebbar ist.The invention relates to a safety switch with a in a switch housing axially displaceably mounted, spring-loaded locking pin, which in a the switching element by means of a solenoid against the spring force releasing position is movable.

Derartige Sicherheitsschalter sind in vielen Ausführungsformen bekannt. Die Grundforderung besteht darin, daß sie so gestaltet sein müssen, daß bei herausgezogenem Betätiger auch die Ausschaltstellung zwangsweise herbeigeführt wird. Dies erfolgt durch eine auf den Sperrbolzen wirkende Druckfeder, die den Sperrbolzen in die Blockierstellung drückt. Zum Freigeben des üblicherweise als Schaltrad ausgebildeten Schaltelementes wird der Hubmagnet erregt, so daß dessen Anker entgegen der Wirkung der Druckfeder verfahren wird und dadurch den Sperrbolzen in die Freigabestellung verfährt.Such safety switches are known in many embodiments. The basic requirement is that they must be designed so that when pulled out Actuator is also forced to the off position. This is done by a compression spring acting on the locking pin, which in the locking pin the blocking position presses. To release what is usually designed as a ratchet wheel Switching element, the solenoid is excited so that its armature counter the action of the compression spring is moved and thereby the locking pin in the release position moves.

Bei den bisher bekannten Sicherheitsschaltern wird der Hubmagnet so lange erregt, d. h. mit Strom durchflutet, bis daß der Sperrbolzen wieder in die Blockierstellung gefahren werden soll. Der Hubmagnet muß so ausgelegt werden, daß die zum Entriegeln des Sperrbolzens notwendige Hubkraft erzeugt wird. Diese Hubkraft ist jedoch deutlich größer, im Normalfall ca. vierzigmal höher als die Haltekraft, die notwendig ist, um den Sperrbolzen in der Freigabestellung zu halten. Bei den bisher bekannten, an sich bewährten Ausführungen wird es jedoch als Nachteil angesehen, daß der elektrische Energiebedarf relativ hoch ist. Außerdem ist die Wärmeentwicklung aufgrund der relativ hohen Stromaufnahme sehr hoch.In the previously known safety switches, the solenoid is excited for as long as d. H. flooded with current until the locking pin is again in the blocking position to be driven. The solenoid must be designed so that the Unlocking the locking bolt necessary lifting force is generated. However, this lifting force is significantly larger, usually about forty times higher than the holding force required to hold the locking pin in the release position. With the previously known in proven designs, however, it is considered a disadvantage that the electrical energy requirement is relatively high. In addition, the heat development very high due to the relatively high power consumption.

Der Erfindung liegt die Aufgabe zugrunde, einen Sicherheitsschalter der eingangs näher beschriebenen Art in konstruktiv einfacher Weise so auszubilden, daß der Energiebedarf für das Halten des Sperrbolzens in der Freigabestellung deutlich verringert wird.The invention has for its object a safety switch of the beginning to be described in a constructively simple manner so that the Energy requirement for holding the locking pin in the release position is significantly reduced becomes.

Die gestellte Aufgabe wird durch einen den Stößel in seiner Freigabestellung haltenden Haftmagneten gelöst, so daß der Hubmagnet in dieser Stellung stromlos ist.The task is performed by a holding the plunger in its release position Holding magnets released so that the lifting magnet is de-energized in this position.

Durch den zweiten, gegenüber den bekannten Ausführungen zusätzlichen Haftmagneten wird die Funktion durch eine vom Hubmagneten aufzubringende Hubarbeit und in eine vom Haftmagneten aufzubringende Haltearbeit aufgeteilt. Der Haftmagnet hat eine deutlich geringere Stromaufnahme als der Hubmagnet, da er lediglich die geringe Haltekraft aufbringen muß. Damit die einwandfreie Funktion gewährleistet ist, wird der Haftmagnet erregt, bevor der Hubmagnet abgeschaltet wird. Es erfolgt demzufolge eine Überschneidung.By the second, additional magnet compared to the known designs the function is achieved by lifting work to be carried out by the lifting magnet and divided into a holding work to be performed by the holding magnet. The magnet has a significantly lower current consumption than the solenoid, since it only has the must have low holding force. To ensure that it functions properly, the holding magnet is energized before the lifting magnet is switched off. It follows accordingly an overlap.

Ein weiterer wesentlicher Vorteil gegenüber den bekannten Ausführungen liegt auch noch darin, daß durch die geringere Stromaufnahme des Haftmagneten auch die Wärmeentwicklung deutlich reduziert wird. Von der Funktion her unterscheidet man Sicherheitsschalter, die nach dem Ruhestromprinzip und nach dem Arbeitsstromprinzip arbeiten. Die erfindungsgemäße Ausführung ist für beide Arten einsetzbar.Another significant advantage over the known designs is also still in that also due to the lower current consumption of the holding magnet Heat development is significantly reduced. A distinction is made in terms of function Safety switches that operate on the closed-circuit principle and on the open-circuit principle work. The embodiment according to the invention can be used for both types.

In weiterer Ausgestaltung ist vorgesehen, daß der Anker des Hubmagneten und der Anker des Haftmagneten an einem Ende eines quer zum Sperrbolzen stehenden Kipphebels angelenkt sind, der am gegenüberliegenden Ende auf einer ortsfesten Achse schwenkbar gelagert ist und mit dem Sperrbolzen in einer Mitnahmeverbindung steht. Bei Erregung des Hubmagneten folgt der Anker des Haftmagneten der Bewegung des Ankers des Hubmagneten, da durch die Anlenkung an den Kipphebel eine Zwangskopplung erfolgt. Dadurch ist sichergestellt, daß der Kipphebel in der Stellung verbleibt, sobald der Haftmagnet erregt wird.In a further embodiment it is provided that the armature of the solenoid and the Anchor of the holding magnet at one end of a transverse to the locking pin Rocker arms are articulated, the opposite end on a stationary Axis is pivotally mounted and with the locking pin in a driving connection stands. When the solenoid is excited, the armature of the holding magnet follows the Movement of the armature of the solenoid, because of the linkage to the rocker arm a forced coupling takes place. This ensures that the rocker arm in the Position remains as soon as the holding magnet is excited.

In einer anderen Ausführung ist jedoch auch denkbar, daß der Anker des Hubmagnetens in der Freigabestellung des Sperrbolzens vom Haftmagneten gehalten wird. In another embodiment, however, it is also conceivable that the armature of the lifting magnet is held by the holding magnet in the release position of the locking bolt.

Eine konstruktiv einfache Ausführung wird erreicht, wenn auf den Sperrbolzen eine Traverse fest aufgesetzt ist, gegen die sich das eine Ende einer den Sperrbolzen in der Blockierstellung haltenden Druckfeder abstützt, und daß die andere, dem Schaltelement zugewandte Seite mit dem Kipphebel in Berührung steht.A structurally simple design is achieved when a Traverse is firmly attached, against which one end of the locking pin in supports the blocking position holding compression spring, and that the other, the switching element facing side is in contact with the rocker arm.

Bei dieser Ausführung wird keine feste Verbindung zwischen dem Kipphebel und dem Sperrbolzen notwendig. Sobald der Haftmagnet nicht mehr erregt wird, drückt die Druckfeder den Sperrbolzen in die Blockierstellung, wobei der Kipphebel in die entsprechende Ausgangsstellung zurückgeschwenkt wird und die Anker des Hub- und des Haftmagneten ebenfalls in die Außerbetriebsstellung zurückgefahren werden. Dabei ist es dann zweckmäßig, wenn sich das andere, dem Schaltelement abgewandte Ende der Druckfeder gegen ortsfeste Innenteile des Schaltergehäuses abstützt. Dieses Innenteil bildet dann ein Widerlager für die Druckfeder.In this version there is no fixed connection between the rocker arm and the locking pin necessary. As soon as the magnet is no longer energized, press the compression spring the locking pin in the blocking position, the rocker arm in the corresponding starting position is pivoted back and the anchor of the lifting and of the holding magnet can also be returned to the non-operating position. It is then expedient if the other, facing away from the switching element Support the end of the compression spring against stationary inner parts of the switch housing. This inner part then forms an abutment for the compression spring.

Das Innenteil könnte beispielsweise eine quer zum Sperrbolzen stehende Rippe oder eine Zwischenwand sein. Eine Verdrehsicherung des Sperrbolzens ist in einfachster Weise gegeben, wenn vorzugsweise beide Stirnenden der Traverse in Langlöchern von Platten, beispielsweise Leiterplatten geführt sind, wobei die Langlöcher in Richtung des Sperrbolzens verlaufen. Diese Leiterplatten stehen in einem geringen Abstand zu zwei parallelen Wandungen des Schaltergehäuses.The inner part could for example be a rib or transverse to the locking pin be a partition. Securing the locking bolt against rotation is the simplest Given if preferably both ends of the traverse in elongated holes of plates, for example printed circuit boards, the elongated holes in the direction of the locking pin. These circuit boards are a short distance apart to two parallel walls of the switch housing.

Zweckmäßigerweise liegt die Traverse im mittleren Bereich des Kipphebels. Dadurch ergeben sich günstige Kräfteverhältnisse, da der Kipphebel wie ein einarmiger Hebel wirkt. Die Anker des Hub- und des Haftmagneten stehen dann im Abstand zum Sperrbolzen. Da außerdem der Abstand des Hub- und des Haftmagneten zur Schwenkachse des Kipphebels größer ist, als der Abstand der Traverse zur Schwenkachse, ist der Hub des Ankers des Hubmagneten und des Ankers des Haftmagneten größer als der Verschiebeweg des Sperrbolzens. Der Verschiebeweg des Sperrbolzens ist jedoch ausgelegt, daß dann das Schaltelement, beispielsweise das Schaltrad gedreht werden kann. Dadurch wird normalerweise der Sperrbolzen noch um die Differenz zwischen dem Hub des Ankers des Hubmagneten und dem Verschiebeweg des Sperrbolzens verschoben, so daß der Verschiebeweg genauso groß ist, wie der Hub.The crossmember is expediently located in the central region of the rocker arm. Thereby the balance of power is favorable because the rocker arm is like a one-armed lever works. The armatures of the lifting and holding magnets are then at a distance from Locking pin. Since also the distance of the lifting and holding magnets to Swivel axis of the rocker arm is greater than the distance of the crossbar to Swivel axis, is the stroke of the armature of the solenoid and the armature of the Holding magnets larger than the displacement of the locking pin. The displacement route the locking bolt is designed, however, that then the switching element, for example the ratchet wheel can be turned. This normally becomes the locking pin the difference between the stroke of the armature of the solenoid and the Displacement of the locking pin shifted so that the displacement is the same is big as the stroke.

Die in Frage kommenden Sicherheitsschalter werden je nach Verwendung in den unterschiedlichsten Einbaulagen montiert. Damit nun sichergestellt ist, daß der Anker des Hubmagneten im nicht erregten Zustand in die Stellung selbsttätig und ungewollt zurückfällt, in der der Sperrbolzen in der Blockierstellung steht, ist vorgesehen, daß auf den Sperrbolzen ein quer dazu stehendes Brückenglied fest aufgesetzt ist, und daß der Anker des Hubmagneten mit dem dem Kipphebel abgewandten Endbereich in dem Brückenglied verschiebbar geführt ist. Dadurch kann sich bei der Erregung des Hubmagneten der Anker gegenüber dem Sperrbolzen relativ bewegen, es wird jedoch verhindert, daß er im stromlosen Zustand bereits dann in seiner Ausgangsstellung zurückfällt, bevor der Sperrbolzen in die Blockierstellung zurückverfahren wird.The safety switches in question are used in the different installation positions. This now ensures that the anchor of the solenoid in the non-excited state into the position automatically and unintentionally falls back, in which the locking pin is in the blocking position, it is provided that on the locking pin a transverse bridge member is firmly placed, and that the armature of the solenoid with the end region facing away from the rocker arm is slidably guided in the bridge member. This can cause excitement of the lifting magnet of the armature relative to the locking pin, it will move however, prevents him from being in his currentless state Starting position falls back before the locking pin moves back into the blocking position becomes.

Damit der Sicherheitsschalter für die unterschiedlichsten Spannungen verwendbar ist, ist vorgesehen, daß die Stromversorgung des Hub- und des Haftmagneten durch einen Schaltregler mit Pulsbreitenmodulator erfolgt. Dadurch wird eine Allstromausführung ohne Spannungsvarianten geschaffen, so daß trotz der unterschiedlichen Spannungen der Sicherheitsschalter international einsetzbar ist. Damit keine zusätzlichen Spulen für die Spannungsregelung erforderlich werden, ist vorgesehen, daß die Induktivitäten der Arbeitsspulen des Hub- und des Haftmagneten als Glättungsinduktivität ausgelegt sind.So that the safety switch can be used for a wide variety of voltages is, it is provided that the power supply to the solenoid and the holding magnet a switching regulator with pulse width modulator. This makes an all-current version created without voltage variants, so that despite the different Voltages of the safety switch can be used internationally. So that no additional Coils are required for voltage regulation, it is provided that the inductances of the working coils of the solenoid and the holding magnet as smoothing inductance are designed.

Anhand der beiliegenden Zeichnungen wird die Erfindung noch näher erläutert.The invention is explained in more detail with reference to the accompanying drawings.

Es zeigen:

Figur 1
einen erfindungsgemäßen Sicherheitsschalter im Teilschnitt und
Figur 2
den Sicherheitsschalter nach der Fig. 1 in einer um 90 Grad gedrehten Schnittstellung.
Show it:
Figure 1
a safety switch according to the invention in partial section and
Figure 2
1 in a sectional position rotated by 90 degrees.

Der erfindungsgemäße Sicherheitsschalter 10 weist ein nicht näher erläutertes Schaltergehäuse 11 auf, an dessen Stirnfläche ein Aufsatz 12 angeflanscht ist, in dem ein Schaltrad 13 als Schaltelement drehbar gelagert ist. Der Aufsatz 12 ist mit einer Öffnung 28 versehen, um beispielsweise mittels eines nicht dargestellten Radiusbetätigers das Schaltrad 13 zu verdrehen. Mittig im Schaltergehäuse 10 ist ein Sperrbolzen 14 verschiebbar gelagert. Die Verschieberichtung verläuft in axialer bzw. in Längsrichtung des Sperrbolzens 14. Mit einem Ende ist der Sperrbolzen 14 aus dem Schaltergehäuse 11 herausgeführt und greift in der in den Fig. 1 und 2 dargestellten Sperrstellung in eine entsprechende Ausnehmung des Schaltrades 13 ein. Das andere Ende des Sperrbolzens 14 ist in einem rohrförmigen Ansatz 15 geführt, der an einer Zwischenwand des Schaltergehäuses 11 angeformt ist.The safety switch 10 according to the invention has an unspecified one Switch housing 11, on the end face of which an attachment 12 is flanged, in which a ratchet 13 is rotatably mounted as a switching element. The attachment 12 is with an opening 28, for example by means of a radius actuator, not shown to turn the ratchet wheel 13. In the middle of the switch housing 10 is a Locking pin 14 slidably mounted. The direction of displacement is in the axial or in the longitudinal direction of the locking pin 14. The locking pin 14 is at one end led out of the switch housing 11 and engages in that shown in FIGS. 1 and 2 Locked position in a corresponding recess of the ratchet 13. The other end of the locking pin 14 is guided in a tubular extension 15, which is formed on an intermediate wall of the switch housing 11.

In dem dem Schaltrad 13 zugewandten Bereich ist an einer Wand des Schaltergehäuses 11 ein nach Art eines einarmigen Hebels gestalteter Kipphebel 16 auf einer ortsfesten Achse 17 schwenkbar gelagert. An das gegenüberliegende Ende des Kipphebels 16 ist der Anker 18 eines Hubmagneten 19 und der Anker 20 eines Haftmagneten 21 angelenkt.In the area facing the ratchet wheel 13 is on a wall of the switch housing 11 a rocker arm 16 designed in the manner of a one-armed lever on one stationary axis 17 pivotally mounted. To the opposite end of the The rocker arm 16 is the armature 18 of a lifting magnet 19 and the armature 20 of a holding magnet 21 articulated.

Auf den Sperrbolzen 14 ist eine Traverse 22 fest aufgesetzt, die mit dem Kipphebel 16 in Berührung steht. Die Traverse 22 liegt seitlich neben dem Kipphebel 16 oder unterhalb, je nach Einbaulage, und zwar an der Seite, die dem Schaltrad 13 abgewandt liegt. Gegen diese Traverse 22 stützt sich das eine Ende einer den Sperrbolzen 14 umgreifenden Druckfeder 23 ab. Diese Druckfeder liegt an der dem Kipphebel 16 abgewandten Seite. Das andere Ende stützt sich an einem ortsfesten Teil des Schaltergehäuses 11 ab. Dies kann beispielsweise ein Steg oder eine Zwischenwand 24 sein. Der Sperrbolzen 14 durchdringt diese Zwischenwand 24. Auf den Sperrbolzen 14 ist außerdem noch ein Brückenglied 25 fest aufgesetzt. Dieses Brückenglied liegt an der Seite der Zwischenwand 24, die der Druckfeder 23 abgewandt liegt. Der Anker 18 des Hubmagneten 19 ist an der dem Kipphebel 16 abgewandt liegenden Seite mit einem Gewindeansatz versehen, auf dem eine Mutter aufgeschraubt ist. Dieser Gewindeansatz durchdringt eine Bohrung des Brückengliedes 25, so daß in der nicht erregten Stellung des Magneten 19 und bei nicht erregtem Haftmagneten 21 das Brückenglied 25 an der Zwischenwand 24 anliegt. In dieser Stellung greift gemäß den Fig. 1 und 2 der Sperrbolzen 14 in eine Ausnehmung des Schaltrades 13 ein, so daß dieses blockiert ist.On the locking pin 14, a cross member 22 is firmly attached to the rocker arm 16 is in contact. The crossmember 22 is laterally next to the rocker arm 16 or below, depending on the installation position, on the side facing away from the switching wheel 13 lies. One end of the locking bolt is supported against this crossmember 22 14 encompassing compression spring 23. This compression spring lies on the rocker arm 16 opposite side. The other end rests on a fixed part of the Switch housing 11 from. This can be, for example, a web or an intermediate wall Be 24. The locking pin 14 penetrates this partition 24. On the locking pin 14 a bridge member 25 is also firmly attached. This bridge link is on the side of the intermediate wall 24 which is remote from the compression spring 23. Of the Armature 18 of the solenoid 19 is on the rocker arm 16 facing away Side with a threaded attachment on which a nut is screwed. This threaded approach penetrates a bore of the bridge member 25, so that in the non-energized position of the magnet 19 and when the holding magnet is not energized 21 the bridge member 25 abuts the intermediate wall 24. In this position 1 and 2 of the locking pin 14 in a recess of the ratchet wheel 13 so that it is blocked.

Soll nun ein Schaltvorgang eingeleitet werden, wird zunächst der Hubmagnet 19 erregt, so daß der Anker 18 angezogen wird und den Kipphebel 16 um einen relativ kleinen Winkel geschwenkt wird, wie durch die strichpunktierte Linie 16' angedeutet ist (Fig. 1).If a switching process is now to be initiated, the lifting magnet 19 is first excited, so that the armature 18 is attracted and the rocker arm 16 by a relative is pivoted small angle, as indicated by the dash-dotted line 16 ' is (Fig. 1).

Es ergibt sich, daß der Verschiebeweg des Sperrbolzens 14 geringer ist, als der Hub des Ankers 18 des Hubmagneten 19. Der Verschiebeweg des Sperrbolzens 14 ist jedoch so groß, daß das Schaltrad gedreht werden kann, wodurch der Verschiebeweg dann gleich oder annähernd gleich dem Hub des Ankers 18 ist. Während zuvor die auf den Gewindeansatz des Ankers 18 aufgesetzte Mutter im Abstand zum Brückenglied 25 liegt, wird nach dem zweiten Verschieben des Sperrbolzens 14 wieder ein Kontakt erreicht. Es ist dann sichergestellt, daß bei allen Einbaulagen der Anker 18 in dieser Stellung verbleibt, wenn der Hubmagnet 19 nicht mehr erregt wird. Bevor jedoch diese Erregung aufgehoben wird, wird der Haftmagnet 21 erregt, so daß der Sperrbolzen 14 in der Freigabestellung verbleibt. Nachdem auch der Haftmagnet 21 nicht mehr erregt wird, verschiebt die Druckfeder 23 den Sperrbolzen 14 in die Blockierstellung. It follows that the displacement of the locking pin 14 is less than the stroke of the armature 18 of the lifting magnet 19. However, the displacement of the locking pin 14 is so large that the ratchet wheel can be rotated, causing the displacement path is then the same or approximately the same as the stroke of the armature 18. While previously the on the threaded approach of the anchor 18 nut placed at a distance from the bridge member 25 lies, is after the second shift of the locking pin 14 again Contact reached. It is then ensured that the anchor 18 in in all installation positions this position remains when the solenoid 19 is no longer energized. Before however this excitation is canceled, the holding magnet 21 is excited so that the Locking bolt 14 remains in the release position. After the holding magnet 21 is no longer excited, the compression spring 23 moves the locking pin 14 in the Blocking position.

Aus der Fig. 2 geht insbesondere noch hervor, daß neben dem Hubmagnet 19 und dem Haftmagneten 21 benachbart zweier paralleler Seitenwände des Schaltergehäuses 11 zwei Leiterplatten 26, 27 angeordnet sind. Diese Leiterplatten 26, 27 sind im Verschiebebereich der Traverse 22 mit in Längsrichtung des Sperrbolzens 14 verlaufenden Langlöchern versehen, in denen stirnseitige Zapfen der Traverse 22 geführt sind.From Fig. 2 it is particularly clear that in addition to the solenoid 19 and the holding magnet 21 adjacent two parallel side walls of the switch housing 11 two circuit boards 26, 27 are arranged. These circuit boards 26, 27 are in the displacement area of the cross member 22 with in the longitudinal direction of the locking bolt 14 provided elongated holes in which the front pin of the cross member 22nd are led.

Die Fig. 2 zeigt, daß der Haftmagnet 21 mittels einer Bolzenverbindung an der Leiterplatte 27 festgelegt ist.Fig. 2 shows that the holding magnet 21 by means of a bolt connection on the circuit board 27 is set.

Claims (9)

Sicherheitsschalter mit einem in einem Schaltergehäuse axial verschiebbar gelagerten, federbelasteten Sperrbolzen, der in eine ein Schaltelement blockierende und in eine das Schaltelement mittels eines Hubmagneten entgegen der Federkraft freigebende Stellung verschiebbar ist, gekennzeichnet durch einen den Sperrbolzen (14) in seiner Freigabestellung haltenden Haftmagneten (21), so daß der Hubmagnet (19) in dieser Stellung stromlos ist.Safety switch with a spring-loaded locking pin which is axially displaceably mounted in a switch housing and which can be moved into a position blocking a switching element and into a position releasing the switching element by means of a lifting magnet against the spring force, characterized by a holding magnet (21) holding the locking pin (14) in its release position ), so that the solenoid (19) is de-energized in this position. Sicherheitsschalter nach Anspruch 1, dadurch gekennzeichnet, daß der Anker (18) des Hubmagneten (19) und der Anker (20) des Haftmagneten (21) an einem Ende eines quer zum Sperrbolzen (14) stehenden Kipphebels (16) angelenkt sind, der am gegenüberliegenden Ende auf einer ortsfesten Achse (17) schwenkbar gelagert ist und mit dem Sperrbolzen (14) in einer Mitnahmeverbindung steht.Safety switch according to claim 1, characterized in that the armature (18) of the lifting magnet (19) and the armature (20) of the holding magnet (21) are articulated at one end of a rocker arm (16) which is transverse to the locking pin (14) and which is on opposite end is pivotally mounted on a fixed axis (17) and is in a driving connection with the locking pin (14). Sicherheitsschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß auf den Sperrbolzen (14) eine Traverse (22) fest aufgesetzt ist, gegen die sich das Ende einer den Sperrbolzen (14) in der Blockierstellung haltenden Druckfeder (23) abstützt, und daß die andere, dem Schaltelement (13) zugewandte Seite mit dem Kipphebel (16) in Berührung steht. Safety switch according to claim 1 or 2, characterized in that a crossbar (22) is fixedly placed on the locking pin (14) against which the end of a compression spring (23) holding the locking pin (14) in the blocking position is supported, and that other side facing the switching element (13) is in contact with the rocker arm (16). Sicherheitsschalter nach Anspruch 3, dadurch gekennzeichnet, daß sich das andere, dem Schaltrad (13) abgewandte Ende der Druckfeder (23) gegen ortsfeste Innenteile (24) des Schaltergehäuses (11) abstützt.Safety switch according to claim 3, characterized in that the other end of the compression spring (23) facing away from the switching wheel (13) is supported against stationary inner parts (24) of the switch housing (11). Sicherheitsschalter nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, daß vorzugsweise beide Stirnenden der Traverse 22 in Langlöchern von Leiterplatten (26, 27) geführt sind, wobei die Langlöcher in Längsrichtung des Sperrbolzens (14) verlaufen.Safety switch according to one or more of the preceding claims 1 to 4, characterized in that preferably both ends of the crossmember 22 are guided in elongated holes of printed circuit boards (26, 27), the elongated holes running in the longitudinal direction of the locking bolt (14). Sicherheitsschalter nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Traverse (22) im mittleren Bereich des Kipphebels (16) liegt.Safety switch according to one or more of the preceding claims 1 to 5, characterized in that the crossmember (22) lies in the central region of the rocker arm (16). Sicherheitsschalter nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 6, dadurch gekennzeichnet, daß auf den Sperrbolzen (14) ein quer dazu stehendes Brückenglied (25) fest aufgesetzt ist, und daß das dem Kipphebel (16) abgewandt liegende Ende des Ankers (18) des Hubmagneten (19) mit der dem Kipphebel (16) abgewandten Seite in dem Brückenglied (25) verschiebbar geführt ist.Safety switch according to one or more of the preceding claims 1 to 6, characterized in that a bridge member (25) standing transversely thereto is fixedly placed on the locking bolt (14), and in that the end of the armature (18) facing away from the rocker arm (16) of the lifting magnet (19) with the side facing away from the rocker arm (16) is displaceably guided in the bridge member (25). Sicherheitsschalter nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Stromversorgung des Hub- und des Haftmagneten (19, 21) durch einen Schaltregler mit Pulsbreitenmodulator erfolgt.Safety switch according to one or more of the preceding claims 1 to 7, characterized in that the power supply to the lifting and holding magnets (19, 21) is provided by a switching regulator with a pulse width modulator. Sicherheitsschalter nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Induktivitäten der Arbeitsspulen des Hub- und des Haftmagneten (19, 21) als Glättungsinduktivität ausgelegt sind.Safety switch according to one or more of the preceding claims 1 to 7, characterized in that the inductances of the work coils of the lifting and holding magnets (19, 21) are designed as smoothing inductors.
EP97120918A 1997-04-10 1997-11-28 Safety switch Expired - Lifetime EP0871189B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29706340U DE29706340U1 (en) 1997-04-10 1997-04-10 Safety switch
DE29706340U 1997-04-10

Publications (2)

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EP0871189A1 true EP0871189A1 (en) 1998-10-14
EP0871189B1 EP0871189B1 (en) 2001-06-27

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ID=8038689

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EP97120918A Expired - Lifetime EP0871189B1 (en) 1997-04-10 1997-11-28 Safety switch

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US (1) US5909166A (en)
EP (1) EP0871189B1 (en)
AT (1) ATE202655T1 (en)
DE (2) DE29706340U1 (en)
DK (1) DK0871189T3 (en)
ES (1) ES2158429T3 (en)

Cited By (2)

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WO2008009319A1 (en) * 2006-07-19 2008-01-24 Euchner Gmbh + Co. Kg Apparatus for monitoring the state of a protective device of a machine
CN108150608A (en) * 2017-12-21 2018-06-12 中航电测仪器股份有限公司 A kind of helicopter is locked with quick-connect couplings and its application method

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
JP3982143B2 (en) * 2000-03-15 2007-09-26 オムロン株式会社 Lock switch device
DE10030714A1 (en) * 2000-06-23 2002-01-10 Schmersal K A Gmbh & Co Safety switch has energy storage device for delivering energy pulse that together with holding energy applies energy required to move bolt into alternate position against spring loading
WO2009095032A1 (en) * 2008-01-29 2009-08-06 Siemens Aktiengesellschaft Safety switch having a hold-closed function for positive opening of contact elements, and method for positive opening of contact elements of a safety switch with a locking function

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EP0553885A1 (en) * 1992-01-31 1993-08-04 Omron Corporation Safety switch
DE19510716A1 (en) * 1995-03-24 1996-09-26 Jungheinrich Ag Emergency stop and / or handbrake device for industrial trucks

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008009319A1 (en) * 2006-07-19 2008-01-24 Euchner Gmbh + Co. Kg Apparatus for monitoring the state of a protective device of a machine
US8228146B2 (en) 2006-07-19 2012-07-24 Euchner Gmbh & Co. Kg Apparatus for monitoring the state of a protective device of a machine
US8289112B1 (en) 2006-07-19 2012-10-16 Euchner Gmbh & Co. Kg Apparatus for monitoring the state of a protective device of a machine
CN108150608A (en) * 2017-12-21 2018-06-12 中航电测仪器股份有限公司 A kind of helicopter is locked with quick-connect couplings and its application method
CN108150608B (en) * 2017-12-21 2020-01-14 中航电测仪器股份有限公司 Quick connection coupling lock for helicopter and use method thereof

Also Published As

Publication number Publication date
DK0871189T3 (en) 2001-09-03
DE29706340U1 (en) 1997-06-05
DE59703906D1 (en) 2001-08-02
EP0871189B1 (en) 2001-06-27
ATE202655T1 (en) 2001-07-15
US5909166A (en) 1999-06-01
ES2158429T3 (en) 2001-09-01

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