EP0749629A1 - Safety switch - Google Patents

Safety switch

Info

Publication number
EP0749629A1
EP0749629A1 EP95909782A EP95909782A EP0749629A1 EP 0749629 A1 EP0749629 A1 EP 0749629A1 EP 95909782 A EP95909782 A EP 95909782A EP 95909782 A EP95909782 A EP 95909782A EP 0749629 A1 EP0749629 A1 EP 0749629A1
Authority
EP
European Patent Office
Prior art keywords
cam
locking member
safety switch
key
axis
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
EP95909782A
Other languages
German (de)
French (fr)
Other versions
EP0749629B1 (en
Inventor
Werner Rapp
Peter Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Euchner GmbH and Co KG
Original Assignee
Euchner GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Euchner GmbH and Co KG filed Critical Euchner GmbH and Co KG
Publication of EP0749629A1 publication Critical patent/EP0749629A1/en
Application granted granted Critical
Publication of EP0749629B1 publication Critical patent/EP0749629B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Definitions

  • the invention relates to a safety switch which has the features of the preamble of claim 1.
  • the locking member is designed as a metallic, longitudinally displaceable locking pin which, in the locking position, engages to a certain extent in a transverse bore in a disc which is arranged next to the cam disc and is integrally formed therewith.
  • a metallic actuating pin is arranged as an actuating element.
  • the locking pin holds the actuating pin in a position in which the latter protrudes into the key channel.
  • the known safety switch is therefore relatively complex.
  • the invention has for its object to provide an inexpensive safety switch. This object is achieved by a safety switch with the features of claim 1.
  • the operating member can be formed in one piece with the locking member, thereby reducing the costs simply because of the reduced number of individual parts to be manufactured and assembled can be significantly reduced.
  • the actuating member is preferably designed as a slide which lies in a plane parallel to the cam disc and is provided with an opening for the passage of the axis of rotation.
  • the effort for guiding such a slide is very low. This applies particularly when the opening is designed as an elongated hole with a width matched to the diameter of the axis of rotation, because then the slide can be guided by the axis of rotation.
  • the locking member is preferably formed by a stop for a stop surface of the receptacle, which is formed by a material part provided on the side of the cam disc facing the slide.
  • This section of material preferably has the shape of a disk into which a groove-like recess penetrates from the peripheral surface, one flank of which forms the stop surface.
  • the stop formed by the locking member preferably has a tooth-like shape.
  • a locking member designed in this way also contributes to the fact that the component forming the locking member and the actuating member can have a simple and inexpensive shape. Since the actuating member has at least one part of the material which is guided laterally past the axis of rotation, the locking member could lie in the plane defined by the actuating member. In a preferred embodiment, however, the locking member is arranged next to the actuating member on its side facing the cam disc in a radial orientation on the part of the material forming the receptacle.
  • a minimum of individual parts is obtained when the material part forming the receptacle is formed in one piece with the cam disc and its axis of rotation.
  • a second locking element with associated actuating element are designed like the first locking element or its actuating element for reasons of cost.
  • the receptacle assigned to the second locking member is designed like the receptacle assigned to the first locking member.
  • FIG. 1 shows a partially sectioned side view of the exemplary embodiment with associated key
  • FIG. 2 shows another second side view of the exemplary embodiment, also partially in section
  • FIG. 1 A section along the line III - III of Fig.2
  • a safety switch which can only be operated by means of an associated key 1, contains in a main part
  • a switch not shown, which is actuated by means of a plunger 3 which is arranged in the housing in a longitudinally displaceable manner.
  • a head part 5 is fastened to one end face of the main part 2 of the housing by means of screws 4, which can also be arranged rotated by 90 ° relative to the main part 2 about the longitudinal axis of the plunger 3 instead of in the position shown in FIGS. 1 and 2.
  • a cam disk 7 rotatably mounted, which is aligned with the end of the tappet 3 pointing toward it and having a cup-shaped end.
  • This end of the plunger 3 is held by a spring, not shown, in contact with the control cam 8 formed by part of the circumferential surface of the cam disk 7.
  • a segment 7 'of the cam plate 7, the lateral surface of which does not form the control cam 8, projects into a key channel 9 which penetrates the head part 5 transversely to the longitudinal direction of the axis of rotation 6.
  • a disk-shaped material section 12 is molded onto the cam disk 7 on both sides thereof. These two identical material parts 12 together with the cam 7 and the axis of rotation 6 form a one-piece component made of plastic. As FIG. 1 shows for the one part of material 12, these have a groove-like recess 13 which is open both radially outwards and in the axial direction and which forms with its flank an approximately radially extending stop surface 14.
  • a slider 15 is arranged in the longitudinal direction of the plunger 3 in the head part 5 directly next to the respective disc-shaped material section 12 present here.
  • the two identically designed slides 15 have the shape of a flat rail, which lies in a plane parallel to the cam disk 7.
  • the slide 15 is penetrated centrally by an elongated hole 16 extending in the direction of displacement, the width of which is adapted to the diameter of the axis of rotation 6, as a result of which the slide 15 is guided through the axis of rotation 6.
  • the head part 5 is provided with an additional, groove-like guide 17 for the two slides 15.
  • this end section forms two ramps 19 and 20 inclined in opposite directions. Key 1 runs against one ramp 19 when it is inserted into the key channel.
  • the other ramp 20 is required because both sliders 15 are of the same design and are arranged in mirror image of the cam plate 7 in the head part 5.
  • a locking member 21 is formed in the form of a tooth, which points in the radial direction against the axis of rotation 6 and is aligned with the disk-shaped material section 12, ie in the same plane as this lies.
  • the slider 15 forms the actuating member for the locking member 21.
  • the locking member 21 engages in the recess 13 of the associated disc-shaped material section 12 such that its one flank on the stop surface 14 and its head surface on the flank of the recess 13 adjoining the stop surface 14.
  • the locking member 21 therefore prevents in its locking position that the cam 7 can be rotated, namely positively for the direction of rotation in the sense of a switch actuation, i.e. 1 counterclockwise, since in this direction of rotation the plunger 3 runs from the highest point of the control cam 8 to the lowest point, which is followed by a shoulder 8 ', which prevents further rotation.
  • the key 1 When the key 1 is inserted into the key channel 9, it first runs against the ramp 19 or 20 of the two slides 15, as a result of which these are moved so far against the main part 2 of the housing that the locking member 21 has the associated stop surface 14 releases. Now the crosspiece 1 1 , which enters the groove 10, can rotate the cam disk 7, whereby the tappet 3 comes into contact with the lowest section of the control cam 8, which results in the switch being closed. In this rotational position of the cam 7, not shown, the two locking members 21 are held by the key 1 in the release position.
  • the safety switch consists of a minimum of individual parts which are also easy to assemble, namely apart from the housing and the screws 4 connecting the two parts together from the switch with the plunger 3 , the component consisting of the cam plate 7, the axis of rotation 6 and the disk-shaped material parts 12, the two sliders 15 each forming one of the locking members 21 and their actuating member, and the two helical springs 18.

Abstract

PCT No. PCT/EP95/00689 Sec. 371 Date Sep. 9, 1996 Sec. 102(e) Date Sep. 9, 1996 PCT Filed Feb. 25, 1995 PCT Pub. No. WO95/24726 PCT Pub. Date Sep. 14, 1995A safety switch has a key (1) which, when inserted into and removed from a key channel (9), forcibly rotates a cam plate (7) and so switches over the switch. The safety switch further has an interlocking device for the cam plate (7) which is disposed adjacent the latter, can be forcibly released by the key (1) when it is introduced into the key channel (9) and has at least one locking member (21) which can be displaced in translation and, in its locked position, engages in an interlocking manner with a housing disposed adjacent the cam plate (7). The locking member (21) can be displaced into the released position by the key (1) by means of an actuating member (15) which is moveable together with the locking member (21) and is integral therewith. The part of the actuating member (15) which projects into the key channel (9) in the locked position is connected to the locking member (21) by means of a material section which is laterally guided past the axis of rotation (6).

Description

Sicherheitsschalter Safety switch
Die Erfindung betrifft einen Sicherheitsschalter, der die Merkmale des Oberbegriffs des Anspruches 1 aufweist.The invention relates to a safety switch which has the features of the preamble of claim 1.
Bei einem bekannten Schalter dieser Art ist das Sperrglied als ein metallischer, längsverschiebbarer Sperrstift ausgebildet, der in der Sperrstellung ein Stück weit in eine Querbohrung einer neben der Kurvenscheibe angeordneten und mit dieser einstückig ausgebildeten Scheibe eingreift. In dieser Quer¬ bohrung, die mit reduziertem Querschnitt zum Schlüsselkanal hin offen ist, ist als Betätigungsglied ein metallischer Betätigungsstift angeordnet. In der Sperrstellung hält der Sperrstift den Betätigungsstift in einer Position, in welcher letzterer i-n den Schlüsselkanal ragt. Wenn der Schlüssel in den Schlüsselkanal eingeführt wird, muß er zunächst den Betä¬ tigungsstift so weit verschieben, daß der Sperrstift nicht mehr in die Bohrung eingreift. Da nach der Entriegelung der Schlüssel die Kurvenscheibe dreht, liegt in der Freigabe¬ stellung der Betätigungsstift nicht mehr am Sperrstift an. Damit dennoch sowohl der Betätigungsstift als auch der Sperr¬ stift ihre Positionen beibehalten, müssen noch für beide Stifte entsprechende Anlageflächen vorgesehen sein. Der be¬ kannte Sicherheitsschalter ist deshalb relativ aufwendig. Der Erfindung liegt die Aufgabe zugrunde, einen kostengünsti¬ geren Sicherheitsschalter zu schaffen. Diese Aufgabe löst ein Sicherheitsschalter mit den Merkmalen des Anspruches 1.In a known switch of this type, the locking member is designed as a metallic, longitudinally displaceable locking pin which, in the locking position, engages to a certain extent in a transverse bore in a disc which is arranged next to the cam disc and is integrally formed therewith. In this transverse bore, which is open towards the key channel with a reduced cross section, a metallic actuating pin is arranged as an actuating element. In the locked position, the locking pin holds the actuating pin in a position in which the latter protrudes into the key channel. When the key is inserted into the key channel, it must first shift the actuating pin so far that the locking pin no longer engages in the bore. Since the cam rotates after the key has been unlocked, the actuating pin is no longer in contact with the locking pin in the release position. So that both the actuating pin and the locking pin retain their positions, corresponding contact surfaces must still be provided for both pins. The known safety switch is therefore relatively complex. The invention has for its object to provide an inexpensive safety switch. This object is achieved by a safety switch with the features of claim 1.
Dadurch, daß der in der Sperrstellung in den Schlüsselkanal ragende Teil des Betätigungsgliedes über eine an der Drehachse der Kurvenscheibe seitlich vorbeigeführte Materialpartie mit dem Sperrglied verbunden ist, kann man das Betätigungsglied einstückig mit dem Sperrglied ausbilden, wodurch die Kosten allein schon wegen der reduzierten Anzahl der herzustellenden und zu montierenden Einzelteile deutlich verringert werden.Characterized in that the part of the actuating member projecting into the key channel in the locked position is connected to the locking member via a material part guided laterally past the axis of rotation of the cam disk, the operating member can be formed in one piece with the locking member, thereby reducing the costs simply because of the reduced number of individual parts to be manufactured and assembled can be significantly reduced.
Vorzugsweise ist das Betätigungsglied als ein Schieber ausge¬ bildet, der in einer zur Kurveπscheibe parallelen Ebene liegt und mit einem Durchbruch für den Durchtritt der Drehachse versehen ist. Der Aufwand für die Führung eines solchen Schie¬ bers ist sehr gering. Diese gilt in besonderem Maße dann, wenn der Durchbruch als ein Langloch mit einer auf den Durchmesser der Drehachse abgestimmten Weite ausgebildet ist, weil dann der Schieber von der Drehachse geführt werden kann.The actuating member is preferably designed as a slide which lies in a plane parallel to the cam disc and is provided with an opening for the passage of the axis of rotation. The effort for guiding such a slide is very low. This applies particularly when the opening is designed as an elongated hole with a width matched to the diameter of the axis of rotation, because then the slide can be guided by the axis of rotation.
Das Sperrglied ist vorzugsweise durch einen Anschlag für eine Anschlagfläche der Aufnahme gebildet, die von einer auf der dem Schieber zugewandten Seite der Kurvenscheibe vorgesehenen Materialpartie gebildet ist. Diese Materialpartie hat vorzugs¬ weise die Form einer Scheibe, in welche von der Umfangsflache her eine nutartige Ausnehmung eindringt, deren eine Flanke die Anschlagflä-che bildet. Eine derartige Aufnahme läßt sich sehr kostengünstig herstellen, da sie auch in axialer Richtung offen sein kann.The locking member is preferably formed by a stop for a stop surface of the receptacle, which is formed by a material part provided on the side of the cam disc facing the slide. This section of material preferably has the shape of a disk into which a groove-like recess penetrates from the peripheral surface, one flank of which forms the stop surface. Such a recording can be produced very inexpensively, since it can also be open in the axial direction.
Bei einer Aufnahme in Form einer nutartigen Ausnehmuπg hat der Anschlag, den das Sperrglied bildet, vorzugsweise eine zahnar¬ tige Form. Auch ein in dieser Weise ausgebildetes Sperrglied trägt dazu bei, daß das das Sperrglied und das Betätigungs¬ glied bildende Bauteil eine einfache und kostengünstige Form haben kann. Da das Betätigungsglied wenigstens eine seitlich an der Dreh¬ achse vorbeigeführte Materialpartie aufweist, könnte das Sperrglied in der durch das Betätigungsglied definierten Ebene liegen. Bei einer bevorzugten Ausführungsform ist jedoch das Sperrglied neben dem Betätigungsglied auf dessen der Kurven¬ scheibe zugewandter Seite in radialer Ausrichtung auf der die Aufnahme bildenden Materialpartie angeordnet.In the case of a receptacle in the form of a groove-like recess, the stop formed by the locking member preferably has a tooth-like shape. A locking member designed in this way also contributes to the fact that the component forming the locking member and the actuating member can have a simple and inexpensive shape. Since the actuating member has at least one part of the material which is guided laterally past the axis of rotation, the locking member could lie in the plane defined by the actuating member. In a preferred embodiment, however, the locking member is arranged next to the actuating member on its side facing the cam disc in a radial orientation on the part of the material forming the receptacle.
Ein Minimum an Einzelteilen erhält man dann, wenn die die Aufnahme bildende Materialpartie einstückig mit der Kurven¬ scheibe und deren Drehachse ausgebildet ist.A minimum of individual parts is obtained when the material part forming the receptacle is formed in one piece with the cam disc and its axis of rotation.
Aus Kostengrüπdeπ bestehen ferner bei einer bevorzugten Aus¬ führungsform sowohl die Kurvenscheibe mit der die Aufnahme bildenden Materialpartie und der Drehachse als auch das Betä¬ tigungsglied und das einstückig mit ihm ausgebildete Sperr¬ glied aus Kunststoff. Solche Kunststoffteile lassen sich sehr kostengünstig herstellen.For cost reasons, in a preferred embodiment there are also both the cam plate with the part of the material forming the receptacle and the axis of rotation, as well as the actuating member and the blocking member made of plastic in one piece with it. Such plastic parts can be produced very inexpensively.
Sofern aus Sicherheitsgründen ein zweites Sperrglied mit zugehörigem Betätigungsglied vorgesehen ist, sind diese aus Kostengründen wie das erste Sperrglied bzw. dessen Betäti¬ gungsglied ausgebildet. Ferner ist auch die dem zweiten Sperr¬ glied zugeordnete Aufnahme wie die dem ersten Sperrglied zugeordnete Aufnahme ausgebildet.If, for safety reasons, a second locking element with associated actuating element is provided, these are designed like the first locking element or its actuating element for reasons of cost. Furthermore, the receptacle assigned to the second locking member is designed like the receptacle assigned to the first locking member.
Im folgende-n ist die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels im einzelnen erläutert. Es zeigenIn the following-n, the invention is explained in detail with reference to an embodiment shown in the drawing. Show it
Fig. 1 eine teilweise geschnitten dargestellte Seitenan¬ sicht des Ausführungsbeispiels mit zugehörigem Schlüssel, Fig. 2 eine andere teilweise ebenfalls geschnitten darge¬ stellte zweite Seitenansicht des Ausführungsbei¬ spiels ,1 shows a partially sectioned side view of the exemplary embodiment with associated key, FIG. 2 shows another second side view of the exemplary embodiment, also partially in section,
Fig einen Schnitt nach der Linie III - III der Fig.2Fig. A section along the line III - III of Fig.2
Ein Sicherheitsschalter, der nur mittels eines zugehörigen Schlüssels 1 betätigt werden kann, enthält in einem HauptteilA safety switch, which can only be operated by means of an associated key 1, contains in a main part
2 seines aus Kunststoff bestehenden Gehäuses einen nicht dargestellten Schalter, der mittels eines Stößels 3 betätigt wird, der längsverschiebbar im Gehäuse angeordnet ist. Mittels Schrauben 4 ist an der einen Stirnseite des Hauptteiles 2 des Gehäuses ein Kopfteil 5 befestigt, der statt in der in den Fig.l und 2 dargestellten Position auch um 90° gegenüber dem Hauptteil 2 um die Längsachse des Stößels 3 gedreht angeordnet sein kann.2 of its plastic housing, a switch, not shown, which is actuated by means of a plunger 3 which is arranged in the housing in a longitudinally displaceable manner. A head part 5 is fastened to one end face of the main part 2 of the housing by means of screws 4, which can also be arranged rotated by 90 ° relative to the main part 2 about the longitudinal axis of the plunger 3 instead of in the position shown in FIGS. 1 and 2.
Im Kopfteil 5 ist mit rechtwinklig zur Längsachse des StößelsIn the head part 5 is at right angles to the longitudinal axis of the plunger
3 verlaufender Drehachse 6 eine Kurvenscheibe 7 drehbar gela¬ gert, welche auf das gegen sie weisende, kuppenför ige Ende des Stößels 3 ausgerichtet ist. Dieses Ende des Stößels 3 wird durch eine nicht dargestellte Feder in Anlage an der durch einen Teil der Umfangsflache der Kurvenscheibe 7 gebildeten Steuerkurve 8 gehalten. Ein Segment 7' der Kurvenscheibe 7, dessen Mantelfläche nicht die Steuerkurve 8 bildet, ragt in einen Schlüsselkanal 9, welcher den Kopfteil 5 quer zur Längs¬ richtung der Drehachse 6 durchdringt. Eine Nut 10 der Kurven¬ scheibe 7, welche zwischen dem einen Ende des Segmentes 7' und des die Steuerkurve 8 bildenden Segmentes vorgesehen ist, dient der Aufnahme eines Quersteges 1' des Schlüssels 1, welcher einen ersten Längsschlitz 11 des Schlüssels 1 von einem sich bis zu dessen vorderem Ende erstreckenden zweiten Längsschlitz 11' trennt. Beide Längsschlitze 11 und 11' haben eine quer zur Längsrichtung des Schlüssels 1 gemessene Breite, die größer ist als die in axialer Richtung gemessene Dicke der Kurvenscheibe 7. Diese kann deshalb in den ersten Längsschlitz 11 und den zweiten Längsschlitz 11' eingreifen.3 running axis of rotation 6, a cam disk 7 rotatably mounted, which is aligned with the end of the tappet 3 pointing toward it and having a cup-shaped end. This end of the plunger 3 is held by a spring, not shown, in contact with the control cam 8 formed by part of the circumferential surface of the cam disk 7. A segment 7 'of the cam plate 7, the lateral surface of which does not form the control cam 8, projects into a key channel 9 which penetrates the head part 5 transversely to the longitudinal direction of the axis of rotation 6. A groove 10 of the cam disk 7, which is provided between the one end of the segment 7 'and the segment forming the control cam 8, serves to receive a transverse web 1' of the key 1, which has a first longitudinal slot 11 of the key 1 of one separates to the front end extending second longitudinal slot 11 '. Both longitudinal slots 11 and 11 'have a width measured transversely to the longitudinal direction of the key 1, which is greater than the thickness of the measured in the axial direction Cam 7. This can therefore engage in the first longitudinal slot 11 and the second longitudinal slot 11 '.
Auf beiden Seiten der Kurvenscheibe 7 ist an diese eine schei¬ benförmige Materialpartie 12 angeformt. Diese beiden gleich ausgebildeten Materialpartien 12 bilden zusammen mit der Kurvenscheibe 7 und der Drehachse 6 ein einstückiges Bauteil aus Kunststoff. Wie Fig.l für die eine Materialpartie 12 zeigt, weisen diese eine sowohl radial nach außen als auch in axialer Richtung offene, nutartige Ausnehmung 13 auf, welche mit ihrer einen Flanke eine etwa radial verlaufende Anschlag¬ fläche 14 bildet.A disk-shaped material section 12 is molded onto the cam disk 7 on both sides thereof. These two identical material parts 12 together with the cam 7 and the axis of rotation 6 form a one-piece component made of plastic. As FIG. 1 shows for the one part of material 12, these have a groove-like recess 13 which is open both radially outwards and in the axial direction and which forms with its flank an approximately radially extending stop surface 14.
Zu beiden Seiten der Kurvenscheibe 7 ist unmittelbar neben der hier jeweils vorhandenen scheibenförmigen Materialpartie 12 je ein Schieber 15 in Längsrichtung des Stößels 3 verschiebbar im Kopfteil 5 angeordnet. Die beiden gleich ausgebildeten Schie¬ ber 15 haben mit Ausnahme ihrer gegen den Hauptteil 2 des Gehäuses weisenden Endzone die Form einer Flachschiene, welche in einer zur Kurvenscheibe 7 parallelen Ebene liegt. Wie insbesondere Fig.3 zeigt, wird der Schieber 15 mittig von einem sich in der Verschieberichtung erstreckenden Langloch 16 durchdrungen, dessen Weite an den Durchmesser der Drehachse 6 angepaßt ist, wodurch der Schieber 15 eine Führung durch die Drehachse 6 erfährt. Allerdings ist im Ausführungsbeispiel der Kopfteil 5 mit je einer zusätzlichen, nutartigen Führung 17 für die beiden Schieber 15 versehen. Je eine vorgespannte Schraubenfejder 18, deren einer Endabschnitt von einer Sack¬ lochbohrung in der Endzone des Schiebers 15 aufgenommen wird, sucht den Schieber 15 in der in den Fig.l bis 3 dargestellten Sperrstellung zu halten, in welcher sein dem Hauptteil 2 des Gehäuses abgewandter Endabschnitt in den Schlüsselkanal 9 ragt. Wie vor allem Fig.3 erkennen läßt, bildet dieser Endab¬ schnitt zwei in entgegengesetzten Richtungen geneigte Rampen 19 und 20. Gegen die eine Rampe 19 läuft der Schlüssel 1 beim Einführen in den Schlüsselkanal. Die andere Rampe 20 ist erforderlich, weil beide Schieber 15 gleich ausgebildet und spiegelbildlich zur Kurvenscheibe 7 im Kopfteil 5 angeordnet sind .On both sides of the cam plate 7, a slider 15 is arranged in the longitudinal direction of the plunger 3 in the head part 5 directly next to the respective disc-shaped material section 12 present here. With the exception of their end zone facing the main part 2 of the housing, the two identically designed slides 15 have the shape of a flat rail, which lies in a plane parallel to the cam disk 7. As shown in FIG. 3 in particular, the slide 15 is penetrated centrally by an elongated hole 16 extending in the direction of displacement, the width of which is adapted to the diameter of the axis of rotation 6, as a result of which the slide 15 is guided through the axis of rotation 6. However, in the exemplary embodiment, the head part 5 is provided with an additional, groove-like guide 17 for the two slides 15. A prestressed screw spring 18, one end section of which is received by a blind hole in the end zone of the slide 15, tries to hold the slide 15 in the locked position shown in FIGS. 1 to 3, in which its main part 2 of the housing is turned away End section protrudes into the key channel 9. As can be seen above all in FIG. 3, this end section forms two ramps 19 and 20 inclined in opposite directions. Key 1 runs against one ramp 19 when it is inserted into the key channel. The other ramp 20 is required because both sliders 15 are of the same design and are arranged in mirror image of the cam plate 7 in the head part 5.
An die der Kurvenscheibe 7 zugewandte Seite der Endzone des Schiebers 15 ist ein Sperrglied 21 in Form eines Zahnes ange¬ formt, welcher in radialer Richtung gegen die Drehachse 6 weist und auf die scheibenförmige Materialpartie 12 ausgerich¬ tet ist, also in derselben Ebene wie diese liegt. Der Schieber 15 bildet das Betätigungsglied für das Sperrglied 21. In seiner Sperrstellung greift, wie Fig.l zeigt, das Sperrglied 21 in die Ausnehmung 13 der zugeordneten scheibenförmigen Materialpartie 12 derart ein, daß seine eine Flanke an der Anschlagfläche 14 und seine Kopffläche an der an die Anschlag¬ fläche 14 anschließende Flanke der Ausnehmung 13 anliegt. Das Sperrglied 21 verhindert deshalb in seiner Sperrstellung, daß die Kurvenscheibe 7 gedreht werden kann, und zwar formschlüs¬ sig für die Drehrichtung im Sinne einer Schalterbetätigung, d.h. bei einer Blickrichtung gemäß Fig.l entgegen dem Uhrzei¬ gersinn, da bei dieser Drehrichtung der Stößel 3 von der höchsten Stelle der Steuerkurve 8 auf die tiefste Stelle läuft, an die sich eine Schulter 8' anschließt, welche eine weitere Drehung verhindert.On the side of the end zone of the slide 15 facing the cam disk 7, a locking member 21 is formed in the form of a tooth, which points in the radial direction against the axis of rotation 6 and is aligned with the disk-shaped material section 12, ie in the same plane as this lies. The slider 15 forms the actuating member for the locking member 21. In its locking position, as Fig.l shows, the locking member 21 engages in the recess 13 of the associated disc-shaped material section 12 such that its one flank on the stop surface 14 and its head surface on the flank of the recess 13 adjoining the stop surface 14. The locking member 21 therefore prevents in its locking position that the cam 7 can be rotated, namely positively for the direction of rotation in the sense of a switch actuation, i.e. 1 counterclockwise, since in this direction of rotation the plunger 3 runs from the highest point of the control cam 8 to the lowest point, which is followed by a shoulder 8 ', which prevents further rotation.
Wenn der Schlüssel 1 in den Schlüsselkanal 9 eingeführt wird, läuft er zunächst gegen die Rampe 19 oder 20 der beiden Schie¬ ber 15, wodurch diese so weit gegen den Hauptteil 2 des Gehäu¬ ses verschoben werden, daß das Sperrglied 21 die zugehörige Anschlagflache 14 freigibt. Nun kann der Quersteg l1, der in die Nut 10 eintritt, die Kurveπscheibe 7 drehen, wodurch der Stößel 3 in Anlage an den niedrigsten Abschnitt der Steuer¬ kurve 8 kommt, was ein Schließen des Schalters zur Folge hat. In dieser nicht dargestellten Drehstellung der Kurvenscheibe 7 werden die beiden Sperrglieder 21 vom Schlüssel 1 in der Freigabestellung gehalten.When the key 1 is inserted into the key channel 9, it first runs against the ramp 19 or 20 of the two slides 15, as a result of which these are moved so far against the main part 2 of the housing that the locking member 21 has the associated stop surface 14 releases. Now the crosspiece 1 1 , which enters the groove 10, can rotate the cam disk 7, whereby the tappet 3 comes into contact with the lowest section of the control cam 8, which results in the switch being closed. In this rotational position of the cam 7, not shown, the two locking members 21 are held by the key 1 in the release position.
Wenn der Schlüssel 1 aus dem Schlüsselkanal 9 herausgezogen wird, wird die Kurvenscheibe 7 zwangsläufig gedreht, und zwar im Uhrzeigersinn bei einer Blickrichtung gemäß Fig.l, was zur Folge hat, daß der Stößel 3 zwangsläufig gegen den von ihm betätigten Schalter bewegt wird, was ein zwangsläufiges Öffnen dieses Schalters zur Folge hat. Wenn der Schlüssel 1 die beim Einführen betätigte Rampe 19 oder 20 beim Herausziehen aus dem Schlüsselkanal 9 verlassen hat, gibt er die beiden Schieber 15 frei. Die Schraubenfedern 18 schieben dann die beiden Schieber 15 wieder in die Sperrstellung, in welcher jedes der beiden Sperrglieder 21 an der zugeordneten Anschlagfläche 14 anliegt.When the key 1 is pulled out of the key channel 9, the cam 7 is inevitably rotated, specifically clockwise with a direction of view according to Fig.l, which has the consequence that the plunger 3 is inevitably moved against the switch actuated by it, which inevitably opens this switch. When the key 1 has left the ramp 19 or 20 actuated during insertion when it is pulled out of the key channel 9, it releases the two sliders 15. The helical springs 18 then push the two slides 15 back into the locking position, in which each of the two locking members 21 abuts the associated stop surface 14.
Sowohl die Herstellungskosten als auch der Montageaufwand sind sehr gering, weil der Sicherheitsschalter aus einem Minimum an Einzelteilen besteht, die außerdem einfach zu montieren sind, nämlich außer dem Gehäuse und den dessen beide Teile miteinan¬ der verbindenden Schrauben 4 aus dem Schalter mit dem Stößel 3, dem aus der Kurvenscheibe 7, der Drehachse 6 und den schei¬ benförmigen Materialpartien 12 bestehenden Bauteil, den beiden je eines der Sperrglieder 21 und deren Betätigungsglied bil¬ denden Schiebern 15 sowie den beiden Schraubenfedern 18. Both the manufacturing costs and the assembly effort are very low because the safety switch consists of a minimum of individual parts which are also easy to assemble, namely apart from the housing and the screws 4 connecting the two parts together from the switch with the plunger 3 , the component consisting of the cam plate 7, the axis of rotation 6 and the disk-shaped material parts 12, the two sliders 15 each forming one of the locking members 21 and their actuating member, and the two helical springs 18.

Claims

A n s p r ü c h eExpectations
) Sicherheit sscha lter mit a ) e in em S c h a lterg e hä u s e , b) einem in seiner Längsrichtung entgegen der Kraft einer Feder verschiebbar im Schaltergehäuse angeordneten Stößel zum Betätigen eines im Schaltergehäuse angeordne¬ ten Schalters, c) einer im Schaltergehäuse mit rechtwinklig zur Längsachse des Stößels verlaufender Drehachse gelagerten Kurven¬ scheibe, an deren die Steuerkurve bildender Mantelfläche der Stößel anliegt, d) einem Schlüsselkanal im Schaltergehäuse, in den die Kurvenscheibe ragt, e) einem Schlüssel, der beim Einführen in und beim Heraus¬ ziehen aus dem Schlüsselkanal die Kurvenscheibe zwangs¬ läufig um ihre Drehachse dreht und dabei den Schalter umschaltet, und f) einer neben der Kurvenscheibe angeordneten, mittels des Schlüssels beim Einführen in den Schlüsselkanal zwangs¬ läufig lösbaren, formschlüssigen Sperrvorrichtung für die Kurvenscheibe mit wenigstens einem translatorisch verschiebbaren Sperrglied, das in seiner Sperrstellung in formschlüssigem Eingriff mit einer neben der Kurven¬ scheibe angeordneten Aufnahme ist und mittels eines zusammen mit dem Sperrglied bewegbaren Betätigungsglie¬ des, das in der Sperrstellung in den Schlüsselkanal ragt, vom Schlüssel in die Freigabestellung verschiebbar ist , dadurch gekennzeichnet, daß g) das Betätigungsglied (15) einstückig mit dem Sperrglied (21) ausgebildet ist und h) der in der Sperrstellung in den Schlüsselkanal (9) ragende Teil des Betätigungsgliedes (15) über eine an der Drehachse (6) seitlich vorbeigeführte Materialpartie mit dem Sperrglied (21) verbunden ist. 2) Sicherheitsschalter nach Anspruch 1, dadurch gekennzeich¬ net, daß das Betätigungsglied durch einen Schieber (15) ge¬ bildet ist, der in einer zur Kurvenscheibe (7) parallelen Ebene liegt und mit einem Durchbruch (16) für den Durch¬ tritt der Drehachse (6) versehen ist.) Safety switch with a) e in a switch housing, b) a plunger which is displaceable in the longitudinal direction against the force of a spring in the switch housing for actuating a switch arranged in the switch housing, c) one in the switch housing with a right angle to the longitudinal axis of the tappet axis of rotation mounted cam, on the surface of which forms the control cam of the tappet, d) a key channel in the switch housing into which the cam protrudes, e) a key which is inserted into and removed from the cam Key channel, the cam disc inevitably rotates about its axis of rotation and thereby switches the switch, and f) a positive locking device for the cam disc, which is arranged next to the cam disc and is inevitably releasable by inserting it into the key channel, with at least one translationally displaceable locking element, that in its blocking position is in positive engagement with a receptacle arranged next to the cam disc and can be moved from the key into the release position by means of an actuating member which can be moved together with the locking member and which projects into the key channel in the locked position, characterized in that g) the Actuator (15) is formed in one piece with the blocking element (21) and h) the part of the actuating element (15) protruding into the key channel (9) in the blocking position via a material section with the blocking element (21) which is guided laterally past the axis of rotation (6) connected is. 2) Safety switch according to claim 1, characterized gekennzeich¬ net that the actuator is formed by a slide (15) ge, which lies in a plane parallel to the cam (7) and with an opening (16) for the passage of the Axis of rotation (6) is provided.
3) Sicherheitsschalter nach Anspruch 2, dadurch gekennzeich¬ net, daß der Durchbruch als Langloch (16) mit einer auf den Durchmesser der Drehachse (6) abgestimmten Weite ausgebil¬ det ist.3) Safety switch according to claim 2, characterized gekennzeich¬ net that the opening is designed as an elongated hole (16) with a diameter matched to the axis of rotation (6).
4) Sicherheitsschalter nach Anspruch 2 oder 3, dadurch gekenn¬ zeichnet, daß das Sperrglied (21) durch einen Anschlag für eine Anschlagfläche (14) der Aufnahme (13) ausgebildet ist, die von einer auf der dem Schieber (15) zugewandten Seite der Kurvenscheibe (7) vorgesehenen Materialpartie (12) gebildet ist.4) Safety switch according to claim 2 or 3, characterized gekenn¬ characterized in that the locking member (21) is formed by a stop for a stop surface (14) of the receptacle (13) from one of the on the slide (15) facing the Cam (7) provided material section (12) is formed.
5) Sicherheitsschalter nach Anspruch 4, dadurch gekennzeich¬ net, daß die neben der Kurvenscheibe (7) vorgesehene Mate¬ rialpartie (12) durch eine Scheibe und die Anschlagfläche5) Safety switch according to claim 4, characterized gekennzeich¬ net that the next to the cam (7) provided Mate¬ rialpart (12) through a disc and the stop surface
(14) durch eine Flanke einer von der U fangsflache der Scheibe her in diese eindringenden, nutartigen Ausnehmung(14) by a flank of a groove-like recess which penetrates from the circumferential surface of the disk
(13) gebildet ist.(13) is formed.
6) Sicherheitsschalter nach Anspruch 4 oder 5, dadurch gekenn¬ zeichnet, daß der Anschlag des Sperrgliedes (21) eine zahnartige Ausbildung hat.6) Safety switch according to claim 4 or 5, characterized gekenn¬ characterized in that the stop of the locking member (21) has a tooth-like configuration.
7) Sicherheitsschalter nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß das Sperrglied (21) neben dem Betätigungsglied (15) auf dessen der Kurvenscheibe (7) zugewandten Seite in radialer Ausrichtung auf die Aufnahme (13) angeordnet ist. 8) Sicherheitsschalter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die die Aufnahme (13) bildende Materialpartie (12) einstückig mit der Kurveπscheibe (7) und der Drehachse (6) ausgebildet ist.7) Safety switch according to one of claims 4 to 6, characterized in that the locking member (21) next to the actuating member (15) on its side facing the cam (7) is arranged in a radial orientation on the receptacle (13). 8) Safety switch according to one of claims 1 to 7, characterized in that the part (12) forming the receptacle (13) is formed in one piece with the cam disc (7) and the axis of rotation (6).
9) Sicherheitsschalter nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß sowohl die Kurvenscheibe (7) als auch das Betätigungsglied (15) aus Kunststoff beste¬ hen .9) Safety switch according to one of claims 1 to 8, characterized in that both the cam disc (7) and the actuator (15) consist of plastic hen.
10) Sicherheitsschalter nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß ein zweites Sperrglied (21) mit zugehörigem Betätigungsglied (15) , die wie das erste Sperrglied (21) bzw. dessen Betätigungsglied (15) ausge¬ bildet sind, neben der Kurvenscheibe (7) auf deren dem ersten Sperrglied (21) abgekehrten Seite angeordnet sind und daß dem zweiten Sperrglied (21) eine zweite Aufnahme (13) zugeordnet ist, die neben der Kurvenscheibe (7) auf der der ersten Aufnahme (13) abgewandten Seite angeordnet und wie die erste Aufnahme (13) ausgebildet ist. 10) Safety switch according to one of claims 1 to 9, characterized in that a second locking member (21) with associated actuating member (15) which, like the first locking member (21) or its actuating member (15), is formed in addition to the Cam (7) are arranged on the side facing away from the first locking member (21) and that the second locking member (21) is assigned a second receptacle (13), which is next to the cam (7) on the side facing away from the first receptacle (13) arranged and designed as the first receptacle (13).
EP95909782A 1994-03-10 1995-02-25 Safety switch Expired - Lifetime EP0749629B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4408024A DE4408024C5 (en) 1994-03-10 1994-03-10 safety switch
DE4408024 1994-03-10
PCT/EP1995/000689 WO1995024726A1 (en) 1994-03-10 1995-02-25 Safety switch

Publications (2)

Publication Number Publication Date
EP0749629A1 true EP0749629A1 (en) 1996-12-27
EP0749629B1 EP0749629B1 (en) 1997-09-10

Family

ID=6512376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95909782A Expired - Lifetime EP0749629B1 (en) 1994-03-10 1995-02-25 Safety switch

Country Status (6)

Country Link
US (1) US5703339A (en)
EP (1) EP0749629B1 (en)
JP (1) JPH09510042A (en)
AT (1) ATE158108T1 (en)
DE (1) DE4408024C5 (en)
WO (1) WO1995024726A1 (en)

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Also Published As

Publication number Publication date
US5703339A (en) 1997-12-30
WO1995024726A1 (en) 1995-09-14
DE4408024C2 (en) 2000-01-05
EP0749629B1 (en) 1997-09-10
DE4408024C5 (en) 2007-09-06
ATE158108T1 (en) 1997-09-15
DE4408024A1 (en) 1995-09-14
JPH09510042A (en) 1997-10-07

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