EP0653771A2 - Commutateur de sécurité - Google Patents

Commutateur de sécurité Download PDF

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Publication number
EP0653771A2
EP0653771A2 EP94116205A EP94116205A EP0653771A2 EP 0653771 A2 EP0653771 A2 EP 0653771A2 EP 94116205 A EP94116205 A EP 94116205A EP 94116205 A EP94116205 A EP 94116205A EP 0653771 A2 EP0653771 A2 EP 0653771A2
Authority
EP
European Patent Office
Prior art keywords
locking
switching
safety switch
wheel
piece
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
EP94116205A
Other languages
German (de)
English (en)
Other versions
EP0653771B1 (fr
EP0653771A3 (fr
Inventor
Rolf Dipl.-Ing. Wecke
Roland Dipl.-Ing. Mönnings
Ralph Hoppmann
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.)
Hans Bernstein Spezialfabrik fur Schaltkontakte & Co GmbH
Hans Bernstein Spezialfabrik fur Schaltkontakte and Co GmbH
Original Assignee
Hans Bernstein Spezialfabrik fur Schaltkontakte & Co GmbH
Hans Bernstein Spezialfabrik fur Schaltkontakte and Co GmbH
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 Hans Bernstein Spezialfabrik fur Schaltkontakte & Co GmbH, Hans Bernstein Spezialfabrik fur Schaltkontakte and Co GmbH filed Critical Hans Bernstein Spezialfabrik fur Schaltkontakte & Co GmbH
Publication of EP0653771A2 publication Critical patent/EP0653771A2/fr
Publication of EP0653771A3 publication Critical patent/EP0653771A3/fr
Application granted granted Critical
Publication of EP0653771B1 publication Critical patent/EP0653771B1/fr
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
    • 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
    • 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
    • H01H2027/005—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards the key receiving part having multiple openings to allow keys from different directions to operate the switch

Definitions

  • the invention relates to a safety switch with a housing in which a contact-bearing plunger is movably mounted, which can be actuated by a rotatably mounted ratchet wheel, which in turn can be rotated by an actuator in the form of an actuator adapted to the actuation of the switch, for which opening openings are provided in the housing on two sides are, with the ratchet in the sense of locking its rotary movement on both sides associated locking devices which can be moved with the adapted actuator against the spring force into a position releasing the ratchet.
  • Safety switches of this type are used to forcibly switch off the power supply, for example when a protective cover is removed from a device, a machine or the like, housing doors are opened and the like.
  • the safety function there is a need to ensure, if possible, that unauthorized or fundamentally authorized persons cannot actuate the switch in the sense of its activation with the help of actuators that can be simulated simply. Since the manufacturer does not determine from the outset in such safety switches in which spatial position such a safety switch is to be attached to the user, there is also a desire to design such safety switches with a view to corresponding user-friendliness in conjunction with keeping the number of types of such safety switches low different sides can be approached by your actuator.
  • the switching wheel is essentially divided into two.
  • a middle part interacts with the tappet carrying the contacts, while the side of the ratchet wheel provided by an actuator, which can be inserted through openings on two different sides of the housing, can be displaced parallel to the axis of rotation of the ratchet wheel against the force of return springs. which interact with locking surfaces on these relocatable ratchet parts, disengage from these locking surfaces.
  • the locking devices are formed by elements of the two-part ratchet wheel itself.
  • the shift wheel can be rotated starting from a central position when using one approach opening in one direction of rotation, when using the other approach opening in the other direction of rotation, in each case in the sense of the switch actuation, in different directions, that is, in different directions.
  • ratchet wheel parts Since parts of the ratchet wheel themselves have to perform a locking function and they also have to function when the actuator is started from two different directions, these ratchet wheel parts require many degrees of freedom. The security against manipulation against unauthorized or untimely actuation seems to be in need of improvement.
  • the locking function is carried out by locking with the spring-loaded plunger, which is also movable. This and the fact that the ratchet wheel is actuated from a central position, which basically requires a rotational movement in both directions of rotation, harbors an element of uncertainty, particularly with regard to the use of force.
  • locking pieces are provided on the side of a ratchet wheel interacting with the plunger, which can also be displaced parallel to the axis of rotation of the ratchet wheel and can interlock with the ratchet wheel. Only the approach in one direction is disclosed there. Actuator and the two side locking pieces have a simple configuration, so that the security against manipulation can be improved.
  • the present invention is therefore based on the object of providing a safety switch in which the possibility of selecting one of several different directions of approach and a very high level of manipulation security, including security against the use of force, are guaranteed.
  • the solution according to the invention in the case of a generic safety switch is that in the ratchet wheel on each ratchet wheel side two independently acting but motion-coupled locking pieces are provided, which are each offset from one another and assigned to one of the approach openings and which are arranged radially displaceable relative to the switching wheel rotation axis and the locking pins have that cooperate with the surrounding housing area. There are access openings on two different sides of the housing.
  • the the Locking gear locking bars still have only a very low degree of freedom, since one locking piece is provided for each approach direction on each side of the shift gear, so that its configuration and position need only be aligned with one approach direction.
  • the arrangement of the locking pieces in the ratchet wheel in its lateral end faces is essential to the invention.
  • each of the four locking pieces is assigned its own return spring, so that there is therefore a fourfold security.
  • the switching wheel is always in the same direction of rotation in the sense of FIG Tappet actuation can be rotated between an initial and an end position, which are limited by stops. This also contributes significantly to security against manipulation and, in particular, security against the use of force, since the switching wheel has only a single degree of freedom of movement in its respective position.
  • a further preferred embodiment consists in that surface sections of the locking pieces interacting with the adapted actuator are set back spatially offset with respect to surface sections of the ratchet wheel interacting with the adapted actuator.
  • the ratchet wheel with its locking pieces and its mounting is arranged in a hood-like housing parts which can be connected to the rest of the housing by 180 °. It can thus be arranged with the entire rear derailleur part offset by 180 °, with the result that four different approach directions can be made available from the basic structure. Any kind of change or even disassembly of the switching mechanism is not necessary.
  • the ratchet wheel is locked and secured in position by the locking bolts with the hood-like housing part.
  • start-up opening which is not required in the application in question can be tightly closed in order to prevent the ingress of dirt or curable substances and thus a functional risk.
  • the safety switch has a housing 1 in which the usual switch electronics, not shown and not described, is located.
  • a switching plunger 2 for the switch contact actuation against the force of a spring 3 is slidably guided.
  • the switching plunger 2 can only be actuated by means of a special actuator 4 using the special switching mechanism described below.
  • the switching mechanism includes a switching wheel 5, in which, in the exemplary embodiment shown, two radial grooves 6 are provided which are offset by 90 ° to one another, in each of which, depending on the approach direction, an element of the actuator 4 in the sense of the rotation of the switching wheel 5 from an initial position into a switching position. End position can intervene insofar as this rotation is not locked in a manner to be described.
  • the switching wheel 5 is rotatably arranged on an axis of rotation 7, which in turn is fastened in a housing hood 8, which thus accommodates the entire switching mechanism.
  • the housing hood 8 can be assembled with the switch housing 1 by a latching connection 9 in a snap-latching manner.
  • the housing hood has a start-up opening 10 on one side surface and on the top side. Since the housing hood 8 contains the entire switching mechanism, it can be locked in two positions with the switch housing 1 in two positions without problems and in a manner that is functional that there are a total of four different directions of approach. Since the entire switching mechanism, including the lock, is integrated in the housing hood 8, the switching mechanism is automatically locked during this implementation.
  • the start-up opening 10 in the housing hood 8, which is not required for a predetermined application, is tightly closed by a closure piece 11 in order to avoid a risk of contamination.
  • the switching wheel 5 On each of its outward-facing end face sides, the switching wheel 5 is assigned two locking pieces 12 and 13 which act independently of one another but are coupled to one another by movement.
  • the switching wheel 5 has in its two end faces each intersecting receiving pockets 14, in which the locking pieces 12, 13 are guided radially displaceable to the axis of rotation 7, with a return spring 15 is expediently assigned to each side in each of the two locking pieces 12, 13, so that if one of the two springs fails, the locking mechanism is still operational.
  • Each of the locking pieces 12 13 has a locking pin 16.
  • a through bore 17 is provided in the casing of the ratchet wheel 5 and a receiving bore 18 is provided in the adjacent area of the housing hood 8. In the locked position, which is maintained by the springs 15, the ratchet wheel 5 is thus locked against rotation by a total of four locking bolts 16 in the housing hood 8.
  • One locking piece 12 has on the outward-facing side a starting cam 19 for cooperation with the actuator 4 and also a fork piece 20, which forms a receptacle for a fitting bridge piece 21 of the other locking piece 13 of the pair.
  • the web piece 21 of this other locking piece 13 has a projecting bevel 22 which cooperates with a sliding bevel 23 provided in the base of the fork piece 20 of the locking piece 12.
  • the fork piece 20 of the locking piece 12 also has a protruding bevel 24 on each fork arm.
  • On the web piece 21 of the locking piece 13 and the two fork arms of the fork piece 20 of the locking piece 12 there are elongated holes 27 through which the axis of rotation 7 can pass.
  • the locking piece 12 also has a receiving cam 19.
  • the two locking pieces 12, 13 are offset by 90 ° to one another in the two pockets 14.
  • the web piece 21 of the locking piece 13 engages in the fork piece 20 of the locking piece 12.
  • the projecting bevel 22 of the locking piece 13 is effectively at the slope 23 of the Fork piece 20 of the locking piece 12, while the projecting bevels 24 on the fork arms of the locking piece 12 are operatively located on a portion of the sliding slopes 26 of the head piece 25 of the locking piece 13.
  • the two locking pieces 12, 13 can be pushed so far into one another that they can be inserted laterally into the pockets 14 of the ratchet wheel 5, since in this maximum compression position the locking bolts 16 have been retracted so far that they too are still in the pockets fit.
  • the springs 15 then press the locking pieces 12, 13 outwards so that they penetrate the through bores 17 in the switching wheel 5. If the rotary shaft 7 is then inserted through the switching wheel 5 equipped in this way, the rotary axis 7 inserted through it, in conjunction with a corresponding dimensioning of the elongated holes 27, prevents the locking pieces 12, 13 from being pressed into one another to such an extent that the locking bolts 16 come free from the switching wheel 5 .
  • FIG. 2 shows the switching mechanism in the fully locked position, the springs 15 are fully extended so that the locking bolts 16 are located in the receiving bores 18 of the housing hood 8 and the ratchet wheel 5 is locked against rotation.
  • the lateral approach opening 10 in the housing hood 8 is free.
  • the actuator 4 is inserted from there.
  • the actuator 4 is a uni special tool, which is essentially bow-shaped in its projecting area and here has a cross bar 34 in its area interacting with the switching mechanism, and furthermore has special switching pieces 35 in the front area of its two bracket arms.
  • FIGS. 2 and 3 illustrate that the switching pieces 35 of the actuator 4 act on end faces 36 of the starting cams 19 of the locking pieces 13, so that when the actuator 4 is pushed in further (comparison of FIGS. 2 and 3), the locking pieces 13 against the Force of the springs 15 are pushed back radially to the axis of rotation 7 and in the pockets 14 of the switching wheel 5.
  • the locking piece 12 is coupled via its projecting bevels 24 with the bevels 26 under the head piece 25 of the locking piece 13 and is also returned, for complete unlocking to such an extent that the locking bolts 16 are completely retracted from the receiving bores 18 of the housing hood 8 ( Figure 3). The unlocking is now complete.
  • the actuator with the switching pieces 35 act on the end face 36 of the starting cam 19 of the locking piece 12 and push it back, the coupling of motion and simultaneous return of the locking piece 13 then by the interaction of the projecting bevel 22 of the locking piece 13 and the bevel 23 in the base of the fork piece 20 the locking piece 12 would happen.
  • the ratchet wheel 5 can now be rotated by means of the actuator 4, which is inserted even further, in this phase (see FIG. 4) the cross member 34 of the actuator 4 with the corresponding wall of the corresponding radial groove 6 of the ratchet wheel 5 in the sense the twist of the ratchet interacts.
  • the less deep peripheral recess 28 runs out of the engagement area of the switching plunger 2.
  • the control cam 29 slides past this when the ratchet wheel is turned until the deep peripheral recess 30 of the switching wheel 5 comes into the engagement area of the switching plunger 2 (FIG. 5b).
  • the approach opening 10 in the drawings it follows that, even when this approach opening is used, the switching wheel 5 is always transferred from the starting position shown in the same direction of rotation to the switching position.
  • the same direction of rotation of the switching wheel 5 is also available in the event that the housing hood 8 is locked with the housing 1 of the switch from the spatial position shown in the exemplary embodiment shown in 180 °, the lateral approach opening 10 then points to the other side and the upper approach opening instead of at the top left now at the top right.
  • the special actuator 4 can be kept free of spikes or edges from its configuration, so that when a door or the like lies between the actuator and the switch body part, for. B. a hand is not injured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Lock And Its Accessories (AREA)
  • Clamps And Clips (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP94116205A 1993-11-15 1994-10-14 Commutateur de sécurité Expired - Lifetime EP0653771B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4338910 1993-11-15
DE4338910A DE4338910C1 (de) 1993-11-15 1993-11-15 Sicherheitsschalter

Publications (3)

Publication Number Publication Date
EP0653771A2 true EP0653771A2 (fr) 1995-05-17
EP0653771A3 EP0653771A3 (fr) 1995-11-22
EP0653771B1 EP0653771B1 (fr) 1998-03-04

Family

ID=6502595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116205A Expired - Lifetime EP0653771B1 (fr) 1993-11-15 1994-10-14 Commutateur de sécurité

Country Status (4)

Country Link
US (1) US5516993A (fr)
EP (1) EP0653771B1 (fr)
DE (2) DE4338910C1 (fr)
ES (1) ES2113026T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106449208A (zh) * 2016-10-21 2017-02-22 沈阳斯沃电器有限公司 旋转式低压隔离开关操作机构

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6940488B1 (en) 1994-01-06 2005-09-06 Microsoft Corporation System and method of adjusting display characteristics of a displayable data file using an ergonomic computer input device
DE4408024C5 (de) * 1994-03-10 2007-09-06 Euchner Gmbh + Co. Kg Sicherheitsschalter
DE4436579C2 (de) * 1994-10-13 1997-05-22 Bernstein Hans Spezialfabrik Sicherheitsschalter
DE19504744A1 (de) * 1995-02-14 1996-09-12 Schmersal K A Gmbh & Co Sicherheitsschalter
IT1275586B1 (it) * 1995-07-21 1997-08-06 Reiter Srl Interruttore elettromeccanico di sicurezza a chiave
DE29516230U1 (de) * 1995-10-13 1995-12-07 Hans Bernstein, Spezialfabrik für Schaltkontakte GmbH & Co, 32457 Porta Westfalica Radiusbetätiger für Sicherheitsschalter
FR2739971B1 (fr) * 1995-10-13 1998-01-30 Gec Alsthom T & D Sa Mecanisme d'entrainement de contacts de signalisation d'un appareil electrique en particulier d'un sectionneur ou sectionneur de terre haute tension
FR2741993B1 (fr) * 1995-12-05 1998-01-16 Schneider Electric Sa Interrupteur electrique de securite a cle
DE19602690C1 (de) * 1996-01-26 1997-04-10 Euchner & Co Sicherheitsschalter
DE19649717A1 (de) * 1996-11-30 1998-06-04 Euchner Gmbh & Co Sicherheitsschalter
US5912661A (en) * 1997-01-14 1999-06-15 Microsoft Corp. Z-encoder mechanism
IT1292975B1 (it) * 1997-04-11 1999-02-11 Pizzato Elettrica Srl Interruttore di sicurezza a chiave.
DE29711163U1 (de) * 1997-06-26 1997-08-21 Hans Bernstein Spezialfabrik für Schaltkontakte GmbH & Co, 32457 Porta Westfalica Sicherheitsschalter
DE19744563C1 (de) * 1997-10-09 1999-02-04 Peterreins Schalttechnik Gmbh Lasttrennschalter
ITVI980017A1 (it) * 1998-02-02 1999-08-02 Pizzato Elettrica Srl Interruttore elettrico di sicurezza
DE29803028U1 (de) * 1998-02-20 1998-04-09 Hans Bernstein Spezialfabrik für Schaltkontakte GmbH & Co, 32457 Porta Westfalica Sicherheitsschalter
JP2000106066A (ja) 1998-07-30 2000-04-11 Omron Corp キースイッチ
US6013881A (en) * 1999-03-30 2000-01-11 Honeywell Inc. Key operated safety interlock switch
DE10106228A1 (de) * 2001-02-10 2002-09-19 Euchner Gmbh & Co Sicherheitsschalter mit Entriegelungsscheibe
GB0214205D0 (en) * 2002-06-19 2002-07-31 Eja Ltd Lockable switch mechanism
CA2545861C (fr) 2003-11-12 2013-02-12 Research In Motion Limited Etablissement de priorite de reseau donnees compatibles avec delais reduits de services de donnees
US7271355B2 (en) * 2005-11-01 2007-09-18 Honeywell International Inc. Locking mechanism for a safety switch
EP2110391B1 (fr) * 2007-02-02 2013-07-10 Daikin Industries, Ltd. Copolymère contenant du fluor doté d'une excellente résistance au lavage et agent d'élimination des salissures
US20080223012A1 (en) * 2007-03-13 2008-09-18 Black & Decker, Inc. Cordless electric mower fail-safe charge lockout
JP2010157488A (ja) * 2008-12-02 2010-07-15 Idec Corp 安全スイッチ
GB2489525A (en) 2011-04-01 2012-10-03 Idem Safety Switches Ltd Safety switch anti-tamper cam system
GB2496831A (en) 2011-04-01 2013-05-29 Idem Safety Switches Ltd Anti-tamper safety switch with guard locking
GB201205751D0 (en) * 2012-03-30 2012-05-16 Idem Safety Switches Ltd Safety switch with dual anti-tamper

Citations (3)

* 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
US4963706A (en) * 1989-01-12 1990-10-16 Eja Engineering Company Limited Safety switch assemblies
WO1991010247A1 (fr) * 1989-12-30 1991-07-11 Klöckner-Moeller Gmbh Disjoncteur pour capots protecteurs ou analogues

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
DE7627192U1 (de) * 1976-08-31 1976-12-23 Hans & Jos. Kronenberg Gmbh, 5060 Bensberg Zwangskontakt-Schalteinrichtung, insbesondere für Aufzugstüren
DE3100862C2 (de) * 1981-01-14 1984-02-09 K.A. Schmersal Gmbh & Co, 5600 Wuppertal Sicherheitsschalter
US4658102A (en) * 1984-09-08 1987-04-14 K. A. Schmersal Gmbh & Co. Electric switch
WO1994006141A1 (fr) * 1992-08-31 1994-03-17 Idec Izumi Corporation Ensemble interrupteur de securite

Patent Citations (3)

* 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
US4963706A (en) * 1989-01-12 1990-10-16 Eja Engineering Company Limited Safety switch assemblies
WO1991010247A1 (fr) * 1989-12-30 1991-07-11 Klöckner-Moeller Gmbh Disjoncteur pour capots protecteurs ou analogues

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106449208A (zh) * 2016-10-21 2017-02-22 沈阳斯沃电器有限公司 旋转式低压隔离开关操作机构
CN106449208B (zh) * 2016-10-21 2018-12-14 沈阳斯沃电器有限公司 旋转式低压隔离开关操作机构

Also Published As

Publication number Publication date
US5516993A (en) 1996-05-14
DE59405371D1 (de) 1998-04-09
EP0653771B1 (fr) 1998-03-04
DE4338910C1 (de) 1995-02-16
ES2113026T3 (es) 1998-04-16
EP0653771A3 (fr) 1995-11-22

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