EP0776020A1 - Safety switch device - Google Patents

Safety switch device Download PDF

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Publication number
EP0776020A1
EP0776020A1 EP96118491A EP96118491A EP0776020A1 EP 0776020 A1 EP0776020 A1 EP 0776020A1 EP 96118491 A EP96118491 A EP 96118491A EP 96118491 A EP96118491 A EP 96118491A EP 0776020 A1 EP0776020 A1 EP 0776020A1
Authority
EP
European Patent Office
Prior art keywords
actuating
protective cover
fastening element
axis
connecting element
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
EP96118491A
Other languages
German (de)
French (fr)
Other versions
EP0776020B1 (en
Inventor
Helmut Letzel
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.)
KA Schmersal GmbH and Co KG
Original Assignee
KA Schmersal 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
Priority claimed from DE1995143769 external-priority patent/DE19543769A1/en
Priority claimed from DE1996132963 external-priority patent/DE19632963C1/en
Application filed by KA Schmersal GmbH and Co KG filed Critical KA Schmersal GmbH and Co KG
Publication of EP0776020A1 publication Critical patent/EP0776020A1/en
Application granted granted Critical
Publication of EP0776020B1 publication Critical patent/EP0776020B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
    • H01H3/161—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid
    • H01H3/162—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid associated with a hinge of the closing member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/02—Details
    • H01H19/10—Movable parts; Contacts mounted thereon
    • H01H19/14—Operating parts, e.g. turn knob
    • H01H19/18—Operating parts, e.g. turn knob adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2102—Adjustable
    • Y10T74/2106—Timer devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention relates to a safety switching device according to the preamble of claim 1.
  • a locking device for a smoke flap which opens via a temperature-sensitive fuse, wherein a holder for a movably mounted locking bolt is fastened to the inside of the flap and is locked by a locking member that releases the locking bolt when the fuse is triggered by gravity or spring action. Monitoring of the protective flap with regard to its open and closed position is not provided here.
  • DE 40 13 994 A1 discloses a safety switching device for a locking device rotating about an axis, for example a door, in which a disk-shaped actuating cam is provided which actuates the plunger of two switches simultaneously via an actuating device.
  • the actuating cam sits on the axis of the locking device, so that assembly and adjustment are problematic.
  • the locking device must have a specially suitable axis. On retrofitting is also problematic in this respect.
  • the object of the invention is to provide a safety switching device according to the preamble of claim 1, which is easy to assemble and adjust.
  • Fig. 1 shows a side view of a safety switching device.
  • FIGS. 2 and 3 show a side view and a top view of a further embodiment of a fastening element for a safety switching device.
  • FIGS. 4 and 5 show an embodiment of a switching device of a safety switching device in two different switching states according to the opened or closed protective cover.
  • 6 and 7 show two different mounting options for a safety switching device.
  • FIG. 8 and 9 show a side view and an exploded view of further embodiments of switching devices for a safety switching device.
  • FIGS. 12 and 13 each show a jaw of the fastening element of FIGS. 10 and 11 in side view and plan view.
  • the safety switching device shown in Fig. 1 to 3 comprises an electrical switching device 1 with a housing 2, which on a fixed part 3, such as a frame of a protective cover 4 of a machine housing or a fence in dangerous rooms or machine systems, adjacent to that about a movement axis between an open and a closed position pivotable protective cover 4, for example in the form of a protective door, a protective window or a Safety flap is attached.
  • the axis of movement is the axis of an actuating shaft 5 mounted in the housing 2 and projecting therefrom, whose end 6 projecting from the housing 2 has a reduced diameter in this exemplary embodiment.
  • a connecting element 7 is placed, which can be moved in at least two planes and is preferably designed as a universal joint and has two sleeves 8, 9 which are connected to one another via a central piece 10 and universal joints 11.
  • the sleeve 8 is plugged onto the end 6 of the actuating shaft 5 and optionally additionally secured, for example, by a pin, while the sleeve 9 is plugged onto an axis 12, which is preferably corrugated in the longitudinal direction.
  • an adjusting screw 13 is provided in order to be able to make a longitudinal adjustment of the sleeve 8 to the axis 12 and to connect the sleeve 8 and the axis 12 to one another in a rotationally fixed manner.
  • the axis 12 is located on a fastening element 15 attached to the protective cover 4 by means of screws 14.
  • the axis 12 is received in a rotationally fixed manner by a bore 16 in the fastening element 15, the bore 16 adjacent to a side edge of the fastening element 15 (more or less in the assembled state is arranged axially parallel to the actuating shaft 5).
  • the fastening element 15 has two holes 17 which run at right angles to the bore 16 and which receive the screws 14.
  • the holes 17 are designed as elongated holes and in particular are stepped so that the screws 14 can be recessed.
  • the fastening element 15 has two, at least partially threaded bores 18, threaded locking pins 19, each of the parallel bores 18 extending transversely to and crossing the associated hole 17 so that the screw 14 received by the hole 17th is not removable without loosening the associated locking pin 19.
  • the switching device 1 is actuated by pivoting the protective cover 4 into the open or closed position via the connecting element 7, as a result of the arrangement and / or assembly Conditional deviations in the alignment of the actuating shaft 5 and the axis 12 can be compensated for by the cardan joint-like connecting element 7.
  • two force-separating switches 20 are provided, which can be actuated alternately via a disk-shaped actuating cam 21, so that one switch 20 can monitor the open position and the other the closed position of the protective cover 4.
  • the switches 20 have fixed contacts 22 which can be connected via contact bridges 23 to an actuating plunger 24 which can be displaced via the actuating cams 21 in accordance with the position of the protective cover 4.
  • the actuating cam 21 has a cam projection 25 and a notch 26 in axially superposed planes, which are offset by 90 ° to one another.
  • the switching device 1 responds even at a small opening angle of, for example, 3 °.
  • the switching device 1 is attached to the upper end of a post 27, the connecting element 7 additionally comprising an extension piece 28.
  • the switching device 1 is attached directly to a frame element 29 of a part 3 designed as a fence.
  • the actuation shaft 5 carries a roller-shaped actuation cam 21 with two actuation sections 27a, 27b lying axially one above the other.
  • the lower actuating section 27a has a notch 26 provided in the cylindrical periphery of the actuating cam 21 for the latching reception of the actuating plunger 24 of one of the switches 20, which is actuated when the protective cover 4 is opened.
  • the upper actuating section 27b has a cam projection 25 projecting on the cylindrical circumference of the actuating cam 21, which has a reduced diameter in this region, in the axial direction above the latching notch 26, in which the actuating plunger 24 of the corresponding switch 20 is supported when the protective cover 4 is in the closed position located.
  • the cam protrusion 25 extends outward to the periphery of the operating portion 27a.
  • the associated one Switch 20 is also switched, but in the opposite direction with respect to the other switch 20, when the protective cover 7 is opened.
  • the two switches 20 are arranged one above the other in the axial direction of the actuating shaft 5.
  • a very flat housing 2 the thickness of which is essentially equal to the wall thicknesses of the rear of the housing and cover plus the thickness of the switches 20.
  • Such a switching device 1 can be attached to the fixed part 3 somewhere between the joints or hinges provided for the articulation of the protective cover 4, without impairing the pivotability of the latter.
  • an actuating shaft 5, each with a roller-shaped actuating cam 21, can also be mounted in the housing 2 on both sides.
  • an additional actuating cam 21 'having a notch 26 with an additional switch (not shown) can be provided in parallel.
  • the actuating cam 21 ' can additionally or exclusively serve to connect the two actuating shafts 5.
  • the actuating shafts 5 have bores for inserting a connecting piece 30 of the connecting element 7 or a cover 31.
  • the switching device 1 can optionally be connected to the fastening element 15 on one or the other side. If the middle actuating cam 21 'is omitted, two separate monitoring operations are possible.
  • the fastening element 15 shown in FIGS. 10 to 13 comprises two jaws 32, 33 which are pivotally connected to one another via a hinge 34.
  • the axis 12 in particular forms the axis of rotation of the hinge 34.
  • the jaw 33 has a recess 35 for receiving the other jaw 32 provided with the holes 17.
  • the holes 17 are covered in the position of the two jaws 32, 33 shown in FIG. 10, so that the screws 14 are not accessible.
  • the two jaws 32, 33 are received by a recessed Bolt 36 connected to each other, wherein the recess 37 provided in the jaw 33 for receiving the bolt 36 is designed so that the bolt 36 can be screwed into the threaded bore 38 with the jaw 32 slightly pivoted.
  • the jaw 33 receives an adjusting screw 39 which can be supported at one end on the jaw 32, so that the two jaws 32, 33 can be clamped together via the screw bolt 36.
  • a safety switching device of the type described can be easily installed and adjusted, and can subsequently be attached to the protective cover 4 or to the fixed part 3 without additional parts being required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

The cover (4) is pivotable about an axis between open and closed positions to actuate an electrical switch (1) in a direction aligned with the pivot axis. The cover is connected to the switch by a link (7) jointed for movements in two or more planes. The link is attached to the cover by a fixing element (15) with screws (14). The axis is immobilised in a bore close to one edge of the fixing element, and in the assembled position is more or less parallel to the actuating shaft (5).

Description

Die Erfindung betrifft eine Sicherheitsschaltvorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a safety switching device according to the preamble of claim 1.

Aus DE-A-1 553 550 ist eine Sperrvorrichtung für eine Rauchklappe bekannt, die sich über eine temperaturempfindliche Sicherung öffnet, wobei an der Innenseite der Klappe ein Halter für einen in diesem beweglich gelagerten Sperriegel befestigt ist, der durch ein Sperrglied gesperrt ist, das beim Auslösen der Sicherung durch Schwerkraft oder Federwirkung den Sperriegel freigibt. Eine überwachung der Schutzklappe in bezug auf ihre geöffnete und geschlossene Stellung ist hierbei nicht vorgesehen.From DE-A-1 553 550 a locking device for a smoke flap is known, which opens via a temperature-sensitive fuse, wherein a holder for a movably mounted locking bolt is fastened to the inside of the flap and is locked by a locking member that releases the locking bolt when the fuse is triggered by gravity or spring action. Monitoring of the protective flap with regard to its open and closed position is not provided here.

Aus DE 40 13 994 A1 ist eine Sicherheitsschaltvorrichtung für um eine Achse sich drehende Verschlußeinrichtung, etwa eine Tür, bekannt, bei der ein scheibenförmiger Betätigungsnocken vorgesehen ist, der über eine Stelleinrichtung die Stößel von zwei Schaltern gleichzeitig betätigt. Hierbei sitzt der Betätigungsnocken auf der Achse der Verschlußeinrichtung, so daß Montage und Justage problematisch sind. Die-Verschlußeinrichtung muß eine speziell geeignete Achse besitzen. Ein nachträgliches Anbringen ist auch insofern problematisch.DE 40 13 994 A1 discloses a safety switching device for a locking device rotating about an axis, for example a door, in which a disk-shaped actuating cam is provided which actuates the plunger of two switches simultaneously via an actuating device. Here, the actuating cam sits on the axis of the locking device, so that assembly and adjustment are problematic. The locking device must have a specially suitable axis. On retrofitting is also problematic in this respect.

Aufgabe der Erfindung ist es, ein Sicherheitsschaltvorrichtung nach dem Oberbegriff des Anspruchs 1 zu schaffen, die einfach zu montieren und zu justieren ist.The object of the invention is to provide a safety switching device according to the preamble of claim 1, which is easy to assemble and adjust.

Diese Aufgabe wird entsprechend dem kennzeichnenden Teil des Anspruchs 1 gelöst.This object is achieved in accordance with the characterizing part of claim 1.

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

Die Erfindung wird nachstehend anhand von in den beigefügten Abbildungen dargestellten Ausführungsbeispielen näher erläutert.The invention is explained in more detail below with reference to exemplary embodiments shown in the accompanying figures.

Fig. 1 zeigt in Seitenansicht eine Sicherheitsschaltvorrichtung.Fig. 1 shows a side view of a safety switching device.

Fig. 2 und 3 zeigen in Seitenansicht bzw. Draufsicht eine weitere Ausführungsform eines Befestigungselements für eine Sicherheitsschaltvorrichtung.2 and 3 show a side view and a top view of a further embodiment of a fastening element for a safety switching device.

Fig. 4 und 5 zeigen eine Ausführungsform eines Schaltgeräts einer Sicherheitsschaltvorrichtung in zwei verschiedenen Schaltzuständen entsprechend geöffneter bzw. geschlossener Schutzabdeckung.4 and 5 show an embodiment of a switching device of a safety switching device in two different switching states according to the opened or closed protective cover.

Fig. 6 und 7 zeigen zwei verschiedene Montagemöglichkeiten einer Sicherheitsschaltvorrichtung.6 and 7 show two different mounting options for a safety switching device.

Fig. 8 und 9 zeigen in Seitenansicht bzw. in Explosionsdarstellung weitere Ausführungsformen von Schaltgeräten für eine Sicherheitsschaltvorrichtung.8 and 9 show a side view and an exploded view of further embodiments of switching devices for a safety switching device.

Fig. 10 und 11 zeigen eine weitere Ausführungsform eines Befestigungselements in Draufsicht in zwei unterschiedlichen Stellungen.10 and 11 show a further embodiment of a fastening element in plan view in two different positions.

Fig. 12 und 13 zeigen in Seitenansicht bzw. Draufsicht jeweils eine Backe des Befestigungselements der Fig. 10 und 11.FIGS. 12 and 13 each show a jaw of the fastening element of FIGS. 10 and 11 in side view and plan view.

Die in Fig. 1 bis 3 dargestellte Sicherheitsschaltvorrichtung umfaßt ein elektrisches Schaltgerät 1 mit einem Gehäuse 2, das an einem feststehenden Teil 3, etwa einem Rahmen einer Schutzabdeckung 4 eines Maschinengehäuses oder einer Einfriedung an gefahrbringenden Räumen oder Maschinenanlagen, benachbart zu der um eine Bewegungsachse zwischen einer geöffneten und einer geschlossenen Position verschwenkbaren Schutzabdeckung 4 etwa in Form einer Schutztür, eines Schutzfensters oder einer Sicherheitsklappe befestigt ist. Die Bewegungsachse ist dabei die Achse einer in dem Gehäuse 2 gelagerten und aus diesem herausragenden Betätigungswelle 5, deren aus dem Gehäuse 2 herausragendes Ende 6 bei diesem Ausführungsbeispiel einen verminderten Durchmesser aufweist. Auf das Ende 6 ist ein Verbindungselement 7 aufgesetzt, das in mindestens zwei Ebenen gelenkig bewegbar und vorzugsweise als Kardangelenk ausgebildet ist und zwei Hülsen 8, 9 aufweist, die über ein Mittelstück 10 und Kreuzgelenke 11 kardangelenkig miteinander verbunden sind.The safety switching device shown in Fig. 1 to 3 comprises an electrical switching device 1 with a housing 2, which on a fixed part 3, such as a frame of a protective cover 4 of a machine housing or a fence in dangerous rooms or machine systems, adjacent to that about a movement axis between an open and a closed position pivotable protective cover 4, for example in the form of a protective door, a protective window or a Safety flap is attached. The axis of movement is the axis of an actuating shaft 5 mounted in the housing 2 and projecting therefrom, whose end 6 projecting from the housing 2 has a reduced diameter in this exemplary embodiment. On the end 6, a connecting element 7 is placed, which can be moved in at least two planes and is preferably designed as a universal joint and has two sleeves 8, 9 which are connected to one another via a central piece 10 and universal joints 11.

Die Hülse 8 ist auf das Ende 6 der Betätigungswelle 5 gesteckt und gegebenenfalls zusätzlich etwa durch einen Stift gesichert, während die Hülse 9 auf eine vorzugsweise in Längsrichtung geriffelte Achse 12 gesteckt ist. Hierbei ist eine Stellschraube 13 vorgesehen, um eine Längseinstellung der Hülse 8 zur Achse 12 vornehmen zu können und Hülse 8 und Achse 12 drehfest miteinander zu verbinden.The sleeve 8 is plugged onto the end 6 of the actuating shaft 5 and optionally additionally secured, for example, by a pin, while the sleeve 9 is plugged onto an axis 12, which is preferably corrugated in the longitudinal direction. Here, an adjusting screw 13 is provided in order to be able to make a longitudinal adjustment of the sleeve 8 to the axis 12 and to connect the sleeve 8 and the axis 12 to one another in a rotationally fixed manner.

Die Achse 12 befindet sich an einem an der Schutzabdeckung 4 mittels Schrauben 14 angebrachten Befestigungselement 15. Die Achse 12 wird von einer Bohrung 16 im Befestigungselement 15 drehfest aufgenommen, wobei die Bohrung 16 benachbart zu einer Seitenkante des Befestigungselements 15 (im montierten Zustand mehr oder weniger achsparallel zur Betätigungswelle 5) angeordnet ist.The axis 12 is located on a fastening element 15 attached to the protective cover 4 by means of screws 14. The axis 12 is received in a rotationally fixed manner by a bore 16 in the fastening element 15, the bore 16 adjacent to a side edge of the fastening element 15 (more or less in the assembled state is arranged axially parallel to the actuating shaft 5).

Das Befestigungselement 15 weist zwei rechtwinkling zur Bohrung 16 verlaufende Löcher 17 auf, die die Schrauben 14 aufnehmen.The fastening element 15 has two holes 17 which run at right angles to the bore 16 and which receive the screws 14.

Gemäß der in den Fig. 2 und 3 dargestellten Ausführungsform sind die Löcher 17 als Langlöcher ausgebildet und insbesondere gestuft, so daß die Schrauben 14 versenkt aufgenommen werden können.According to the embodiment shown in FIGS. 2 and 3, the holes 17 are designed as elongated holes and in particular are stepped so that the screws 14 can be recessed.

Ferner weist das Befestigungselement 15 zwei von entsprechenden, zumindest teilweise mit Gewinde versehenen Bohrungen 18 aufgenommene, mit Gewinde versehene Sicherungsstifte 19 auf, wobei jede der parallelen Bohrungen 18 quer zum zugehörigen Loch 17 verläuft und dieses kreuzt, so daß die vom Loch 17 aufgenommene Schraube 14 nicht ohne Lösen des zugehörigen Sicherungsstiftes 19 entfernbar ist.Furthermore, the fastening element 15 has two, at least partially threaded bores 18, threaded locking pins 19, each of the parallel bores 18 extending transversely to and crossing the associated hole 17 so that the screw 14 received by the hole 17th is not removable without loosening the associated locking pin 19.

Die Betätigung des Schaltgeräts 1 erfolgt durch Verschwenken der Schutzabdeckung 4 in die geöffnete bzw. geschlossene Stellung über das Verbindungselement 7, wobei infolge der Anordnung und/oder Montage bedingte Abweichungen der Fluchtung der Betätigungswelle 5 und der Achse 12 durch das kardangelenkartige Verbindungselement 7 ausgeglichen werden.The switching device 1 is actuated by pivoting the protective cover 4 into the open or closed position via the connecting element 7, as a result of the arrangement and / or assembly Conditional deviations in the alignment of the actuating shaft 5 and the axis 12 can be compensated for by the cardan joint-like connecting element 7.

Bei dem in Fig. 4 und 5 dargestellten Schaltgerät 1 sind zwei zwangstrennende Schalter 20 vorgesehen, die wechselseitig über einen scheibenförmigen Betätigungsnocken 21 betätigbar sind, so daß ein Schalter 20 die geöffnete und der andere die geschlossene Stellung der Schutzabdeckung 4 überwachen kann. Die Schalter 20 weisen Festkontakte 22 auf, die über Kontaktbrücken 23 an einem über den Betätigungsnocken 21 verschiebbaren Betätigungsstößel 24 entsprechend der Stellung der Schutzabdeckung 4 verbindbar sind. Hierzu weist der Betätigungsnocken 21 in axial übereinander angeordneten Ebenen einen Nockenvorsprung 25 und eine Rastkerbe 26 auf, die um 90° zueinander versetzt sind. Bereits bei einem geringen Öffnungswinkel von beispielsweise 3° spricht das Schaltgerät 1 an.In the switching device 1 shown in FIGS. 4 and 5, two force-separating switches 20 are provided, which can be actuated alternately via a disk-shaped actuating cam 21, so that one switch 20 can monitor the open position and the other the closed position of the protective cover 4. The switches 20 have fixed contacts 22 which can be connected via contact bridges 23 to an actuating plunger 24 which can be displaced via the actuating cams 21 in accordance with the position of the protective cover 4. For this purpose, the actuating cam 21 has a cam projection 25 and a notch 26 in axially superposed planes, which are offset by 90 ° to one another. The switching device 1 responds even at a small opening angle of, for example, 3 °.

Gemäß Fig. 6 ist das Schaltgerät 1 am oberen Ende eines Pfostens 27 angebracht, wobei das Verbindungselement 7 zusätzlich ein Verlängerungsstück 28 umfaßt.6, the switching device 1 is attached to the upper end of a post 27, the connecting element 7 additionally comprising an extension piece 28.

Gemäß Fig. 7 ist das Schaltgerät 1 unmittelbar an einem Rahmenelement 29 eines als Umzäunung ausgebildeten Teils 3 angebracht.7, the switching device 1 is attached directly to a frame element 29 of a part 3 designed as a fence.

Gemäß Fig. 8 trägt die Betätigungswelle 5 trägt einen walzenförmigen Betätigungsnocken 21 mit zwei axial übereinander liegenden Betätigungsabschnitten 27a, 27b.According to FIG. 8, the actuation shaft 5 carries a roller-shaped actuation cam 21 with two actuation sections 27a, 27b lying axially one above the other.

Der untere Betätigungsabschnitt 27a besitzt eine im zylindrischen Umfang des Betätigungsnockens 21 vorgesehene Rastkerbe 26 zur rastenden Aufnahme des Betätigungsstößels 24 eines der Schalters 20, der beim öffnen der Schutzabdeckung 4 betätigt wird.The lower actuating section 27a has a notch 26 provided in the cylindrical periphery of the actuating cam 21 for the latching reception of the actuating plunger 24 of one of the switches 20, which is actuated when the protective cover 4 is opened.

Der obere Betätigungsabschnitt 27b besitzt einen am zylindrischen, in diesem Bereich einen reduzierten Durchmesser aufweisenden Umfang des Betätigungsnockens 21 vorstehenden Nockenvorsprung 25 in Axialrichtung über der Rastkerbe 26, in der sich der Betätigungsstößel 24 des entsprechenden Schalters 20 abstützt, wenn sich die Schutzabdeckung 4 in geschlossener Position befindet. Der Nockenvorsprung 25 erstreckt sich bis zum Umfang des Betätigungsabschnitts 27a auswärts. Der zugehörige Schalter 20 wird ebenfalls, allerdings in umgekehrter Richtung in bezug zum anderen Schalter 20, umgeschaltet, wenn die Schutzabdeckung 7 geöffnet wird. Die beiden Schalter 20 sind hierbei in Axialrichtung der Betätigungswelle 5 übereinander angeordnet.The upper actuating section 27b has a cam projection 25 projecting on the cylindrical circumference of the actuating cam 21, which has a reduced diameter in this region, in the axial direction above the latching notch 26, in which the actuating plunger 24 of the corresponding switch 20 is supported when the protective cover 4 is in the closed position located. The cam protrusion 25 extends outward to the periphery of the operating portion 27a. The associated one Switch 20 is also switched, but in the opposite direction with respect to the other switch 20, when the protective cover 7 is opened. The two switches 20 are arranged one above the other in the axial direction of the actuating shaft 5.

Hierdurch ergibt sich ein sehr flaches Gehäuse 2, dessen Stärke im wesentlichen gleich den Wandstärken von Gehäuserückseite und Dekkel plus Stärke der Schalter 20 ist. Eine derartiges Schaltgerät 1 läßt sich am feststehenden Teil 3 irgendwo zwischen den zur Anlenkung der Schutzabdeckung 4 vorgesehenen Gelenken oder Scharnieren anbringen, ohne die Schwenkbarkeit der letzteren zu beeinträchtigen.This results in a very flat housing 2, the thickness of which is essentially equal to the wall thicknesses of the rear of the housing and cover plus the thickness of the switches 20. Such a switching device 1 can be attached to the fixed part 3 somewhere between the joints or hinges provided for the articulation of the protective cover 4, without impairing the pivotability of the latter.

Wie in Fig. 9 dargestellt ist, kann in dem Gehäuse 2 auch beidseitig jeweils eine Betätigungswelle 5 mit jeweils einem walzenförmigen Betätigungsnocken 21 gelagert sein. Ersichtlich kann außerdem aus Sicherheitsgründen parallel ein zusätzlicher eine Rastkerbe 26 aufweisender Betätigungsnocken 21' mit einem zusätzlichen Schalter (nicht dargstellt) vorgesehen sein. Außerdem kann der Betätigungsnocken 21' zusätzlich oder ausschließlich zum Verbinden der beiden Betätigungswellen 5 dienen.As shown in FIG. 9, an actuating shaft 5, each with a roller-shaped actuating cam 21, can also be mounted in the housing 2 on both sides. Obviously, for safety reasons, an additional actuating cam 21 'having a notch 26 with an additional switch (not shown) can be provided in parallel. In addition, the actuating cam 21 'can additionally or exclusively serve to connect the two actuating shafts 5.

Die Betätigungswellen 5 weisen Bohrungen zum Einstecken eines Verbindungsstücks 30 des Verbindungselements 7 bzw. eines Deckels 31 auf.The actuating shafts 5 have bores for inserting a connecting piece 30 of the connecting element 7 or a cover 31.

Durch die beiden, an gegenüberliegenden Seiten aus dem Gehäuse 2 herausragenden Betätigungswellen 5 läßt sich das Schaltgerät 1 wahlweise an der einen oder anderen Seite mit dem Befestigungselement 15 verbinden. Entfällt der mittlere Betätigungsnocken 21', werden zwei getrennte Überwachungen möglich.Due to the two actuating shafts 5 protruding from the housing 2 on opposite sides, the switching device 1 can optionally be connected to the fastening element 15 on one or the other side. If the middle actuating cam 21 'is omitted, two separate monitoring operations are possible.

Das in den Fig. 10 bis 13 dargestellte Befestigungselement 15 umfaßt zwei Backen 32, 33, die über ein Scharnier 34 schwenkbeweglich miteinander verbunden sind. Hierbei bildet insbesondere die Achse 12 die Drehachse des Scharniers 34. Die Backe 33 weist eine Ausnehmung 35 zur Aufnahme der anderen, mit den Löchern 17 versehenen Backe 32 auf. Die Löcher 17 werden in der in Fig. 10 dargestellten Position der beiden Backen 32, 33 abgedeckt, so daß die Schrauben 14 nicht zugänglich sind. Die beiden Backen 32, 33 werden durch einen versenkt aufgenommenen Schraubbolzen 36 miteinander verbunden, wobei die in der Backe 33 zur Aufnahme des Schraubbolzens 36 vorgesehene Ausnehmung 37 so gestaltet ist, daß der Schraubbolzen 36 bei leicht verschwenkter Backe 32 in deren Gewindebohrung 38 eingeschraubt werden kann.The fastening element 15 shown in FIGS. 10 to 13 comprises two jaws 32, 33 which are pivotally connected to one another via a hinge 34. The axis 12 in particular forms the axis of rotation of the hinge 34. The jaw 33 has a recess 35 for receiving the other jaw 32 provided with the holes 17. The holes 17 are covered in the position of the two jaws 32, 33 shown in FIG. 10, so that the screws 14 are not accessible. The two jaws 32, 33 are received by a recessed Bolt 36 connected to each other, wherein the recess 37 provided in the jaw 33 for receiving the bolt 36 is designed so that the bolt 36 can be screwed into the threaded bore 38 with the jaw 32 slightly pivoted.

Parallel zum Schraubbolzen 36 nimmt die Backe 33 eine Stellschraube 39 auf, die sich mit einem Ende an der Backe 32 abstützen kann, so daß die beiden Backen 32, 33 über den Schraubbolzen 36 miteinander verspannbar sind.Parallel to the screw bolt 36, the jaw 33 receives an adjusting screw 39 which can be supported at one end on the jaw 32, so that the two jaws 32, 33 can be clamped together via the screw bolt 36.

Eine Sicherheitsschaltvorrichtung der beschriebenen Art läßt sich einfach montieren und justieren sowie nachträglich ohne weiteres und ohne Benötigung von zusätzlichen Teilen an der Schutzabdeckung 4 oder an dem feststehenden Teil 3 anbringen.A safety switching device of the type described can be easily installed and adjusted, and can subsequently be attached to the protective cover 4 or to the fixed part 3 without additional parts being required.

Claims (15)

Sicherheitsschaltvorrichtung zur Überwachung einer um eine Bewegungsachse zwischen einer geöffneten und einer geschlossenen Position verschwenkbaren Schutzabdeckung (4) mit einem durch die Bewegung der Schutzabdeckung betätigbaren, elektrischen Schaltgerät (1), welches mit seiner Betätigungseinrichtung (5, 21) axial fluchtend zur Bewegungsachse der Schutzabdeckung (4) angeordnet ist, wobei die Schutzabdeckung (4) über ein Verbindungselement (7) mit dem Schaltgerät (1) verbunden ist, dadurch gekennzeichnet, daß das Verbindungselement (7) in mindestens zwei Ebenen gelenkig bewegbar ausgebildet, mit der Schutzabdeckung (4) über ein Befestigungselement (15) verbunden und das Schaltgerät (1) feststehend und das Befestigungselement (15) im wesentlichen unabhängig von der Bewegungsachse an der Schutzabdeckung (4) befestigt ist.Safety switching device for monitoring a protective cover (4) which can be pivoted about an axis of movement between an open and a closed position, with an electrical switching device (1) which can be actuated by the movement of the protective cover and which, with its actuating device (5, 21), is axially aligned with the axis of movement of the protective cover ( 4) is arranged, the protective cover (4) being connected to the switching device (1) via a connecting element (7), characterized in that the connecting element (7) is designed to be articulated in at least two planes, with the protective cover (4) above a fastening element (15) is connected and the switching device (1) is fixed and the fastening element (15) is fastened to the protective cover (4) essentially independently of the axis of movement. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Betätigungseinrichtung (5, 21) eine mit dem Verbindungselement (7) lösbar verbundene Betätigungswelle (5) umfaßt.Device according to claim 1, characterized in that the actuating device (5, 21) comprises an actuating shaft (5) detachably connected to the connecting element (7). Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Betätigungseinrichtung (5, 21) eine weitere mit dem Verbindungselement (7) lösbar verbindbare Betätigungswelle (5) umfaßt.Device according to claim 2, characterized in that the actuating device (5, 21) comprises a further actuating shaft (5) which can be detachably connected to the connecting element (7). Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Betätigungseinrichtung (5, 21) wenigstens einen Betätigungsnocken (21) für einen zugehörigen Schalter (20) umfaßt.Device according to one of claims 1 to 3, characterized in that the actuating device (5, 21) comprises at least one actuating cam (21) for an associated switch (20). Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß wenigstens zwei Betätigungsnocken (21) axial übereinander angeordnet und entsprechend angeordneten Schaltern (20) zugeordnet sind.Device according to claim 4, characterized in that at least two actuating cams (21) are arranged axially one above the other and are assigned correspondingly arranged switches (20). Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Betätigungseinrichtung (5, 21) zwei Betätigungsnocken (21) zum einen für einen auf die geschlossene Stellung der Schutzabdeckung (4) und zum anderen einen auf die geöffnete Stellung der Schutzabdeckung (4) ansprechenden Schalter (20) umfaßt.Apparatus according to claim 4 or 5, characterized in that the actuating device (5, 21) two actuating cams (21) on the one hand responding to the closed position of the protective cover (4) and on the other hand responding to the open position of the protective cover (4) Switch (20) comprises. Vorrichtung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die Betätigungsnocken (21) walzen- oder scheibenförmig ausgebildet sind.Device according to one of claims 4 to 6, characterized in that the actuating cams (21) are roller-shaped or disc-shaped are trained. Vorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß die Betätigungsnocken (21) für einen Schalter (20) eine Rastkerbe (26) und für den anderen einen Nockenvorsprung (25) aufweisen.Device according to one of claims 4 to 7, characterized in that the actuating cams (21) have a latching notch (26) for a switch (20) and a cam projection (25) for the other. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Verbindungselement (7) ein Wellengelenk, insbesondere ein Doppelwellen- oder Kardangelenk ist.Device according to one of claims 1 to 8, characterized in that the connecting element (7) is a shaft joint, in particular a double shaft or universal joint. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß das Befestigungselement (15) eine Achse (12) umfaßt, die mit dem Verbindungselement (7) längeneinstellbar verbunden ist.Device according to one of claims 1 to 9, characterized in that the fastening element (15) comprises an axis (12) which is connected to the connecting element (7) so as to be adjustable in length. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß das Befestigungselement (15) Bohrungen (18) zur Aufnahme von Sicherungselementen (19) für zum Befestigen des Befestigungselement (15) dienende Schrauben (14) aufweist.Device according to one of claims 1 to 10, characterized in that the fastening element (15) has bores (18) for receiving securing elements (19) for screws (14) used to fasten the fastening element (15). Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß das Befestigungselement (15) zwei gelenkig miteinander verbundene, zusammenklappbare Backen (32, 33) umfaßt.Device according to one of claims 1 to 10, characterized in that the fastening element (15) comprises two hinged jaws (32, 33) which are connected to one another in an articulated manner. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die Gelenkverbindung der beiden Backen (32, 33) eine Drehachse (12) aufweist, die mit dem Verbindungselement (7) gekoppelt ist.Device according to claim 12, characterized in that the articulated connection of the two jaws (32, 33) has an axis of rotation (12) which is coupled to the connecting element (7). Vorrichtung nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß die Backen (32, 33) miteinander derart verschraubbar sind, daß Schrauben (14) zum Anbringen des Befestigungselements (15) an der Schutzabdeckung (4) verdeckt werden.Device according to claim 12 or 13, characterized in that the jaws (32, 33) can be screwed together in such a way that screws (14) for attaching the fastening element (15) to the protective cover (4) are covered. Vorrichtung nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, daß das Befestigungselement (15) ein Spanneinrichtung (39), insbesondere in Form einer von einer Backe (33) aufgenommenen und sich an der anderen Backe (32) abstützenden Stellschraube, für die beiden Backen (32, 33) aufweist.Device according to one of claims 12 to 14, characterized in that the fastening element (15) a clamping device (39), in particular in the form of an adjusting screw received by one jaw (33) and supported on the other jaw (32), for the two Jaws (32, 33).
EP96118491A 1995-11-24 1996-11-19 Safety switch device Expired - Lifetime EP0776020B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE1995143769 DE19543769A1 (en) 1995-11-24 1995-11-24 Safety switch for monitoring of movement of protective cover
DE19543769 1995-11-24
DE1996132963 DE19632963C1 (en) 1996-08-16 1996-08-16 Safety switch for monitoring of movement of protective cover
DE19632963 1996-08-16

Publications (2)

Publication Number Publication Date
EP0776020A1 true EP0776020A1 (en) 1997-05-28
EP0776020B1 EP0776020B1 (en) 1999-09-01

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ID=26020628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118491A Expired - Lifetime EP0776020B1 (en) 1995-11-24 1996-11-19 Safety switch device

Country Status (7)

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US (1) US5896783A (en)
EP (1) EP0776020B1 (en)
JP (1) JPH09171745A (en)
CN (1) CN1159651A (en)
BR (1) BR9605671A (en)
CA (1) CA2189815A1 (en)
DE (1) DE59602943D1 (en)

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US6501040B2 (en) 2001-05-18 2002-12-31 Honeywell International Inc. Dual directional cable actuated emergency stop device
DE20302633U1 (en) * 2003-02-18 2004-07-15 Marantec Antriebs- Und Steuerungstechnik Gmbh & Co. Kg Controlled drive for a door leaf or the like.
CN104626638B (en) * 2015-01-05 2016-09-07 李明科 A kind of numerical control press attachment means
CN109346365B (en) * 2018-09-05 2023-09-22 国网山东省电力公司寿光市供电公司 Outdoor knife switch auxiliary switch protective cover

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US3689718A (en) * 1971-03-31 1972-09-05 Westinghouse Electric Corp Automatic line switch lock-out
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EP0342260A1 (en) * 1988-05-20 1989-11-23 Hundt & Weber Schaltgeräte GmbH Flexible coupling for an intermittent system such as a switch system
GB2225826A (en) * 1988-12-07 1990-06-13 Balay Sa Rotary control assembly for appliances
DE4013994A1 (en) 1990-05-01 1991-11-07 Elan Schaltelemente Gmbh Sealed tamper-proof swing door hinge - has interlock switches and uses grooved cam linked to tandem switches

Also Published As

Publication number Publication date
EP0776020B1 (en) 1999-09-01
BR9605671A (en) 1998-08-18
JPH09171745A (en) 1997-06-30
US5896783A (en) 1999-04-27
CN1159651A (en) 1997-09-17
CA2189815A1 (en) 1997-05-25
DE59602943D1 (en) 1999-10-07

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