WO1995006322A1 - Interrupteur de securite - Google Patents

Interrupteur de securite Download PDF

Info

Publication number
WO1995006322A1
WO1995006322A1 PCT/EP1994/002201 EP9402201W WO9506322A1 WO 1995006322 A1 WO1995006322 A1 WO 1995006322A1 EP 9402201 W EP9402201 W EP 9402201W WO 9506322 A1 WO9506322 A1 WO 9506322A1
Authority
WO
WIPO (PCT)
Prior art keywords
key
recess
switch
safety switch
switching
Prior art date
Application number
PCT/EP1994/002201
Other languages
German (de)
English (en)
Inventor
Walter Link
Original Assignee
Euchner & Co.
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 & Co. filed Critical Euchner & Co.
Priority to EP94920972A priority Critical patent/EP0715766B1/fr
Priority to JP7507288A priority patent/JPH09502297A/ja
Publication of WO1995006322A1 publication Critical patent/WO1995006322A1/fr

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.
  • a larger number of switching wheels are put together to form a roller. Due to their different sizes, the individual driver elements of the ratchet wheels form a coded row of insertion openings for correspondingly formed projections on the crossbar of the assigned key. All switching wheels can therefore be rotated simultaneously only by means of the assigned key, which is a prerequisite for a switch actuation. If not all of the ratchet wheels are rotated simultaneously and inevitably by means of the key, a cross pin of the switch actuator, which penetrates a slot forming the curved path of each ratchet wheel, jams in the slot. This prevents actuation of the switch. Such jams can, however, lead to malfunctions over time even when the associated key is used.
  • the invention is therefore based on the object of providing a security switch of the type mentioned at the outset, which enables the use of coded keys, but nevertheless requires only a small additional outlay compared to security switches with a non-coded key and is in particular susceptible to failure.
  • This problem is solved by a safety switch with the features of claim 1.
  • the effort is not significantly increased either by an additional ratchet wheel or by an additional longitudinal zone of the key which is offset in the longitudinal direction of the key.
  • the AND link between the switch actuator and the switching wheels can also be implemented very easily, because for this purpose the switch actuator only requires a scanning element which is immovable relative to it for each cam track and which is formed by adjacent areas of the part of the switch actuator pointing towards the switching wheel
  • such an AND operation ensures that attempts to operate a switch by means other than the associated switch cannot lead to any malfunctions when the switch is subsequently operated using the associated key.
  • each crossbar of the key must be designed in such a way that it can enter between two flanks of the associated driving element. It is therefore advantageous to design the driver element of each ratchet wheel as a slot in the ratchet wheel that is open to the circumference. Then, however, it is necessary to provide a receptacle in the key following each of the transverse webs, into which the material part of the associated switching wheel adjoining the slot in the circumferential direction can enter.
  • a stepped at its front end according to the arrangement of the crosspieces key can be avoided by having a between the front end and the crosspiece Provides recess in which the ratchet wheel can enter.
  • the tongues laterally delimiting the cutouts can serve to release a rotary lock of the switching wheels.
  • 1 is a plan view of the ratchet wheels and the key in the position at the beginning of the rotary movement of the ratchet wheels when the key is inserted,
  • FIG. 2 is a side view of the first ratchet wheel, the part of the key assigned to it and the switch with switch actuator in the position shown in FIG. 1,
  • FIG. 3 is a side view of the second ratchet wheel, the associated part of the key and the switch with plunger in the position shown in FIG. 1,
  • FIG. 5 is a side view corresponding to FIG. 2 of the first ratchet in the position shown in FIG. 4,
  • a mechanically coded safety switch has a switch 2 in a housing 1, which can be opened or closed against the force of a spring 4 by means of a plunger 3 which can be displaced in its longitudinal direction and, if the plunger 3 permits it, can be closed or opened by the spring 4 .
  • Both the first ratchet wheel 5 and the second ratchet wheel 6 are each provided with a radially extending slot 7 or 8, which is open to the circumference, and a control cam 9 or 10, which through part of the U-shaped surface of the ratchet wheel 5 or 6 is formed.
  • Both in their course formed control cams 9 and 10 form at one end a wedge-shaped groove 9 'and 10', whose cross-sectional profile corresponds approximately to that of the end 3 'of the plunger 3, so that this end 3 1 in the two grooves 9 1 and 10 'can penetrate.
  • the bottom of the grooves 9 'and 10' has the smallest distance of all sections of the control cam from the axis of rotation of the switching wheels 5 and 6. From the groove 9 'or 10', the control curve 9 or 10 rises continuously to its other end.
  • the two ratchet wheels 5 and 6 differ only by different angles between the slot 7 and the groove 9 1 or between the slot 8 and the groove 10 '. In the exemplary embodiment, this angle is 225 ° or 135 ° for the first switching wheel 7, depending on the counting direction, and 180 ° for the second switching wheel 6.
  • the safety switch also has a coded key 11, which has the shape of a flat rail and can be inserted into a key channel 12 of the housing, which is in a plane parallel to the axis of rotation of the switching wheels 5 and 6 lies and runs perpendicular to the longitudinal axis of the plunger 3. Both ratchet wheels 5 and 6 protrude into the key channel 12.
  • the key 11 guided laterally in the key channel 12 has two longitudinal zones, one of which is aligned with the first switching wheel 5 and the other with the second switching wheel 6 when the key 11 is located in the key channel 12 over at least part of its length . As shown in FIG.
  • a transverse web 13 is provided in the longitudinal zone aligned with the first ratchet wheel 5 at a distance from the front end 11 'of the key, the strength of which is selected so that it can engage in the slot 7.
  • a recess 14 Between the crosspiece 13 and the front end 11 'of the key 11 there is a recess 14, the width of which is greater than the width of the first switching wheel 5.
  • the crosspiece 13 separates this recess 14 from a slot-shaped recess 15, which is also how the recess 14 is so wide that the first ratchet 5 can enter it.
  • their length is selected to be somewhat larger than the length of the material portion of the first switching wheel 5 entering the recess 15, as measured in the longitudinal direction of the recess 15.
  • the cross bar 17 of the second longitudinal zone is opposite the cross bar 13 of the first longitudinal line offset to the rear, which is why the recess 16 has a greater extent in the key longitudinal direction than the recess 14.
  • the transverse web 17 separates the recess 16 from a slot-shaped recess 18, which has the same width as the recess 16. Therefore, it can penetrate the second ratchet 6 when it from Crosspiece 17 is rotated into the switch-on position shown in FIG. 6. Since the peripheral part of the ratchet wheel 2, which penetrates into the slot-shaped recess 18 when it rotates, is shorter in accordance with the smaller angle of rotation of the second ratchet wheel 6 and thus the displacement of the crossbar 17 relative to the crossbar 13, the slot-shaped recess 18 ends at the same distance from the front Key end like the slot-shaped recess 15. The sum of the extent of the slot-shaped recess, the transverse web and the recess measured in the longitudinal direction of the key is therefore the same in both longitudinal zones.
  • the recesses 14 and 16 are not required for rotating the switching wheels 5 and 6 by means of the crossbars 13 and 17, respectively.
  • the transverse webs 13 and 17 could therefore form the front key end in the region of the first and second longitudinal zones.
  • the reason why the cutouts 14 and 16 are provided in the exemplary embodiment, that is to say the front key end is formed by three tongues, is that the two switching wheels 5 and 6 are assigned locking elements, not shown, which are brought into their unlocking position before the control wheels 2 and 3 can be turned. This unlocking of the two switching wheels 5 and 6 takes place by means of the tongues of the key 11 which laterally delimit the cutouts 14 and 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Lock And Its Accessories (AREA)

Abstract

L'invention concerne un interrupteur de sécurité qui comprend un élément d'actionnement, une roue à cliquet (5) montée rotative qui comporte une zone curviligne pour piloter le mouvement de l'élément d'actionnement, ainsi qu'un élément entraîneur situé dans le sens circonférentiel, en un point décalé par rapport à la zone curviligne. L'interrupteur comprend également une clé (11) pouvant être introduite dans un canal approprié et qui est pourvue d'une barrette transversale qui coopère avec l'élément entraîneur pour transmettre le mouvement de la clé à la roue à cliquet (5). A proximité de la zone longitudinale comportant la barrette transversale (13), la clé (11) présente au moins une autre zone longitudinale pourvue d'une barrette longitudinale. Au moins une des barrettes transversales (13, 17) de la clé (11) est décalée dans le sens du mouvement de la clé (11) par rapport à au moins une des autres barrettes transversales. Au moins une roue à cliquet (6) supplémentaire comportant une zone curviligne (10) et un élément d'entrînement (8) est disposée à proximité de la roue à cliquet (5). Toutes les roues à cliquet (5, 6) peuvent tourner, indépendamment l'une de l'autre. L'élément d'actionnement est relié par l'intermédiaire d'une opération logique et à chacune des roues à cliquet (5, 6).
PCT/EP1994/002201 1993-08-23 1994-07-05 Interrupteur de securite WO1995006322A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP94920972A EP0715766B1 (fr) 1993-08-23 1994-07-05 Interrupteur de securite
JP7507288A JPH09502297A (ja) 1993-08-23 1994-07-05 安全スイッチ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4328296A DE4328296C1 (de) 1993-08-23 1993-08-23 Sicherheitsschalter
DEP4328296.2 1993-08-23

Publications (1)

Publication Number Publication Date
WO1995006322A1 true WO1995006322A1 (fr) 1995-03-02

Family

ID=6495799

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/002201 WO1995006322A1 (fr) 1993-08-23 1994-07-05 Interrupteur de securite

Country Status (5)

Country Link
EP (1) EP0715766B1 (fr)
JP (1) JPH09502297A (fr)
AT (1) ATE151913T1 (fr)
DE (1) DE4328296C1 (fr)
WO (1) WO1995006322A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473127A (en) * 1995-02-24 1995-12-05 Honeywell Inc. Interlock mechanism for a key operated door switch
IT1275586B1 (it) * 1995-07-21 1997-08-06 Reiter Srl Interruttore elettromeccanico di sicurezza a chiave
DE102006025606A1 (de) * 2006-05-24 2007-11-29 Euchner Gmbh + Co. Kg Vorrichtung zum Überwachen des Zustandes einer Schutzeinrichtung einer Maschine
US7429708B1 (en) * 2007-06-22 2008-09-30 Eja, Limited Safety switch
DE102015002845B4 (de) * 2015-03-06 2018-02-22 E. Dold & Söhne KG Sicherheitsschalteranordnung
DE102015002863A1 (de) 2015-03-06 2016-09-08 E. Dold & Söhne KG Sicherheitsschalteranordnung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550880A1 (fr) * 1983-08-20 1985-02-22 Schmersal K A Gmbh & Co Interrupteur de securite, notamment pour les portes d'ascenseurs
EP0171453A1 (fr) * 1984-08-16 1986-02-19 Letzel, Helmut Dispositif de verrouillage de sécurité de dispositifs protecteurs pour prévenir l'accès dans des zones dangereuses

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4303367C1 (de) * 1993-02-05 1994-02-24 Schmersal K A Gmbh & Co Sicherheitsschalter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550880A1 (fr) * 1983-08-20 1985-02-22 Schmersal K A Gmbh & Co Interrupteur de securite, notamment pour les portes d'ascenseurs
EP0171453A1 (fr) * 1984-08-16 1986-02-19 Letzel, Helmut Dispositif de verrouillage de sécurité de dispositifs protecteurs pour prévenir l'accès dans des zones dangereuses

Also Published As

Publication number Publication date
ATE151913T1 (de) 1997-05-15
DE4328296C1 (de) 1994-11-24
EP0715766B1 (fr) 1997-04-16
EP0715766A1 (fr) 1996-06-12
JPH09502297A (ja) 1997-03-04

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