EP1533826A1 - Sicherheit Positionsschalter - Google Patents

Sicherheit Positionsschalter Download PDF

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Publication number
EP1533826A1
EP1533826A1 EP04105613A EP04105613A EP1533826A1 EP 1533826 A1 EP1533826 A1 EP 1533826A1 EP 04105613 A EP04105613 A EP 04105613A EP 04105613 A EP04105613 A EP 04105613A EP 1533826 A1 EP1533826 A1 EP 1533826A1
Authority
EP
European Patent Office
Prior art keywords
pusher
locking
locking head
main axis
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.)
Withdrawn
Application number
EP04105613A
Other languages
English (en)
French (fr)
Inventor
Hugues Da Dalt
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1533826A1 publication Critical patent/EP1533826A1/de
Withdrawn legal-status Critical Current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
    • H01H27/007—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards the switch being lockable by remote control, e.g. by electromagnet

Definitions

  • the present invention relates to a safety position switch of the type comprising a pusher that responds to the movement of an actuator linked to a device to be secured, so as to move along a main axis to take a rest position and a position work, comprising an electrical member, in particular a switchable contact block depending on the position of the pusher, by means of a transmission mechanism lockable urged by the pusher, and comprising a mechanism locking member transmission, which has a locking head of the mechanism, the locking head being able to take a locking position and an unlocking position.
  • safety position switch will be replaced in this which follows by the expression “safety switch”.
  • the locking member of the transmission mechanism is frequently made under electromagnet form laterally disposed at the actuator / pusher / block assembly of contacts. It can also be a manually operated member, for example by key, or a pneumatic member or any other similar motor member.
  • the invention aims to meet these desiderata.
  • the transmission mechanism comprises a pivoting lever adapted to take a locking position and an unlocking position; the pivoting lever is requested to from the pusher such that translational movement of the pusher generates a rotation of the lever, and the pivoting lever is provided with an applicable wedging element, in the locking position of the lever and transversely to the main axis, against the head blocking.
  • the mechanism thus described makes it possible to jam the locking head by a space-saving mechanism, with an effort of jamming that is easy to predetermine. It also unlocks the safety switch while the actuator is under load. This means that, while the actuator is subjected to a significant extraction effort out of the switch head, the locking member, in particular the electromagnet, can nevertheless be switched from its lock state to its state. unlocking. It is also possible to define the transmission mechanism as having a deformable wedging system under the effect of the movement of the pusher, this system being provided with a stop for the locking head in the direction of the main axis and of an element. jamming exerting on the locking head a force transverse to the main axis when the actuator tends to be removed from the housing of the switch.
  • the lever is pivotally mounted about an axis perpendicular to the axis main and is arranged so that the force applied to the locking head is reduced compared to to the force exerted by the actuator, in a ratio allowing, while the actuator is under load and following an unlocking command of the locking member, a moving the locking head.
  • the locking head can move in translation along the main axis and the pivoting lever forming a stop striker for the end of the locking head in the locking position and a bearing slope adjacent to the striker, the end of the locking head applying then, especially under the effect of a spring, against the slope in the unlocked position.
  • the transmission mechanism may comprise a slide mounted in the housing for move parallel, especially coaxially, to the main axis, the slide being coupled on the one hand in translation to the pusher and on the other hand by a slide or cam at pivoting lever.
  • the pivoting lever has for example a fork shape flanking the slide for apply on bearings provided on an axis located at the end of the locking head, a span being provided in the center of the axis to apply on the slide the latch exerts a lateral thrust.
  • the safety position switch illustrated in FIG. 1 comprises in a housing 10 a electrical switch block 11, in particular a block of contacts, and a drive mechanism 12 for switching the switch block.
  • Mechanism 12 acts on block 11 in response to the approaching or moving movement of a relative actuator 13 to the housing (see arrow F1).
  • the actuator is equipped with specific means of recognition mechanical and, where appropriate, electronic, and is for example associated with an organ 14 (grid, obstacle, ..) Assistant to a dangerous machine M.
  • the safety switch has at least one rotary roller 15 or other element with forms adapted to cooperate with particular forms of the actuator 13 and capable of block the actuator when it is inserted into the housing 10.
  • the roller 15 is housed in a head 16 of the housing 10 of the switch and acts on a pusher 17 included in the head and able to take, depending on whether the actuator 13 is coupled or not coupled to the roller, a rest position (low position in the figures) or a working position (position high on the figures).
  • the head 16 is mounted on the housing in a rotating manner - so to allow different orientations of the actuator; the mechanism allows this rotation of the head without changing the state of the contacts of the switch block 11.
  • the drive mechanism 12 interposed between the pusher 17 and the switch block 11 is lockable, that is, it can be released or blocked by a locking member 20.
  • This member 20 is an electromagnet, a key operated by an operator, an organ pneumatic or any other similar motor unit (see, for example, EP 817,227 and FR 2,751,122).
  • the member 20 is an electromagnet, it comprises a coil 21 and a core 22, which core ends with a locking head 23 which constitutes the locking part of the mechanism.
  • the blocking head 23 blocks the mechanism in a only direction, that is to say prohibits the passage of the pusher from its working position to its position rest, without prohibiting the transition from the rest position to the working position.
  • a control system S is associated with the machine M to control the running and stopping (Sa link); the system S can also receive the information "state of the contacts of the block 11 "(connection Sb) and also control the switching of the electromagnet 20 (connection Sc).
  • the drive mechanism 12 comprises according to the invention a slide 30 and a lever pivoting member 40 forming a deformable system, under the effect of the movement of the pusher, for pinch the locking head.
  • the slider 30 is mounted on a support, such as a wall of the housing 10 or a base reported in this housing, to move in translation along an axis X 'parallel to the axis main X movement of the pusher 17 (see Figures 2 to 9).
  • the housing 10 extends according to the direction X, with arrangement of the core 22 of the electromagnet 20 parallel to the axis X of the pusher and, preferably, in alignment with the axis X.
  • the blocking head 23 of the core has an axis 24 transverse to X, which carries two lateral rollers 25 and a central roller 26 whose function will be explained later.
  • the slider 30 has a coupling element 31, such as a finger or fork, coupled to the lower end of the pusher 17, preferably in an annular groove of the pusher, to allow rotation of the head 16 of the case, without change of state of the contacts of the block 11 nor of the blocking system.
  • the element coupling 31 could also be simply applied against the end of the pusher by a spring.
  • the slide 30 has at least one slide 32 or other form of guide determining the translation of the slide, and cooperating with two fixed axes of guidance 33,34.
  • the slider 30 has a control pin 35 a little offset laterally with respect to the axis X '.
  • a lateral face 36 of the slider 30 can be requested by the central roller 26 of the locking head 23, as will be described later.
  • the pivoting lever 40 is associated with the locking head 23 of the locking core 22 which is located towards the pusher 17.
  • the pivoting lever 40 serves to block the core 22 in its high position (working position) when the actuator 13 is introduced into the head 16 of the housing 10.
  • the lever 40 is pivotally mounted about a Y axis perpendicular to the axis X and has for this purpose a pin 41 mounted on the fixed axis 33, which therefore serves on the one hand pivot and on the other hand guide axis for the slide 32.
  • the Y axis is located, in the X direction, substantially between the pusher 17 and the locking head 23.
  • the lever 40 also has a curved slide 42 to cooperate with the pin 35. The specific form of the slide is intended to appropriately rotate the lever 40 around the axis 33.
  • the lever 40 forms a locking arm 43 which terminates at its free end by an element wedge 44 for exerting transverse pressure on the side rollers 25.
  • the lever 40 forms a stop striker in which can be housed the head of 23.
  • FIG. 2 illustrates an embodiment in which the contact block 11 is actuated directly by the slider 30, the contacts then being the image of the state. of the actuator.
  • the block 11 can also be actuated directly by the pusher 17.
  • the actuator 13 is removed from the head 16 of the switch, so that the pusher 17 is placed in the down position.
  • the coupled slider 30 the pusher is also placed in the lower position and, via the pin 35, pushes the lever 40 counterclockwise in release position.
  • the core 22 of the electromagnet shown in the low position in Figures 4 and 6, is in an unlocked state. This state corresponds according to the case to the excitation or to the de-excitation of the coil 21 of the electromagnet 20 (in the latter case, the core 22 is pushed upwards by a spring and remains in equilibrium with the lower surface 46 of the lever 40).
  • the actuator is engaged in the head 16 of the switch, and the pusher 17 rises by driving the slider 30.
  • the slider 30 forces the lever 40 to rotate clockwise to the specified position.
  • Figures 5 and 7. If the coil 21 is (or remains) excited, the core 22 remains in position low. If the coil 21 is (or remains) de-energized, the lower surface 46 of the lever slides on the rollers 25 of the core 22, then the rollers 25 engage in the space between the wedging elements 44 and the lateral face 36 of the slider 30 and remain housed in high stop in the strike 45 formed by this space.
  • any force exerted on the actuator to extract it from the head 16 of the switch implements a wedging effect of elements 44 on the blocking head 23, all the more important that the extraction effort is big; the force can not damage the electromagnet because the roller 26 carried by the axis 24 of the locking head 23 is applied against the lateral face 36 of the slider 30.
  • the resulting effort is thus taken up by the guiding of the core and, via the axes 33,34, by the housing.
  • lever arms “pivot 33-pin 35” and “pivot 33-elements of 44” are mutually determined to significantly reduce the effort communicated to the core, following the solicitation of the actuator in the direction of extraction, and thus to unlock the locking member while the lever 40 is tightened on the locking head 23.
  • the switch shown allows a rotation of the head 16 relative to the rest of the housing without changing the state of the contacts of the switch block 11 nor the state of the drive mechanism or the locking member.
  • Figures 8 and 9 exploded parts of the drive mechanism 12 and in particular illustrate guides provided in the head 16 for the pusher 17 and in the main part of the housing 10 for the core.
  • the pebbles 25 and 26 mounted on the axis 24 which is associated with the locking head 23 and the realization of the pivot lever 40 in the fork gripping the slide 30, each branch of the fork acting on a roller 25 disposed on the axis 24.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Lock And Its Accessories (AREA)
  • Push-Button Switches (AREA)
EP04105613A 2003-11-21 2004-11-09 Sicherheit Positionsschalter Withdrawn EP1533826A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0313651A FR2862810B1 (fr) 2003-11-21 2003-11-21 Interrupteur de position de securite
FR0313651 2003-11-21

Publications (1)

Publication Number Publication Date
EP1533826A1 true EP1533826A1 (de) 2005-05-25

Family

ID=34430037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04105613A Withdrawn EP1533826A1 (de) 2003-11-21 2004-11-09 Sicherheit Positionsschalter

Country Status (5)

Country Link
US (1) US6982391B2 (de)
EP (1) EP1533826A1 (de)
JP (1) JP2005251726A (de)
CN (1) CN1619743A (de)
FR (1) FR2862810B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876622A1 (de) * 2006-07-03 2008-01-09 Siemens Aktiengesellschaft Positionsschalter
WO2009095032A1 (de) * 2008-01-29 2009-08-06 Siemens Aktiengesellschaft Sicherheitsschalter mit zuhaltungsfunktion zum zwangsöffnung von kontaktelementen sowie verfahren zum zwangsöffnen von kontaktelementen eines sicherheitsschalters mit verriegelungsfunktion
US20140218139A1 (en) * 2013-02-01 2014-08-07 General Electric Company Electrical operator for circuit breaker and method thereof

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0405163D0 (en) * 2004-03-06 2004-04-07 Rockwell Automation B V Latching mechanism
GB0513651D0 (en) * 2005-07-02 2005-08-10 Eja Ltd Lockable switch mechanism
US7544911B2 (en) * 2006-01-20 2009-06-09 John Socha-Leialoha Model railroad switch actuators
DE102006033355A1 (de) * 2006-07-19 2008-01-24 Euchner Gmbh + Co. Kg Vorrichtung zum Überwachen des Zustandes einer Schutzeinrichtung einer Maschine
GB0700146D0 (en) * 2007-01-05 2007-02-14 Eja Ltd Safety switch mounting
US7429708B1 (en) * 2007-06-22 2008-09-30 Eja, Limited Safety switch
EP2339606B1 (de) * 2009-12-24 2012-07-11 Hager Electro Sas Elektrischer Verriegelungsmechanismus zum Schutz einer Leitung mit Differentialfunktion
IT201600096402A1 (it) * 2016-09-26 2018-03-26 Pizzato Elettrica Srl Interruttore di sicurezza con rilevamento dell’azionamento di un comando ausiliario di sblocco
EP3474304B1 (de) * 2017-10-18 2022-08-31 EUCHNER GmbH + Co. KG Sicherheitsschalter
EP3693984B1 (de) * 2019-02-11 2022-08-03 EUCHNER GmbH + Co. KG Sicherheitsschalteranordnung
CN111127718A (zh) * 2020-01-03 2020-05-08 北京中科坤润科技有限公司 一种探伤机安全管控装置、方法及系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5584378A (en) * 1994-02-02 1996-12-17 Bernstein Classic Gmbh & Co. Safety switch assembly
EP0801801B1 (de) * 1993-08-23 1998-06-03 EUCHNER GmbH + Co. Sicherheitsschalter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5488207A (en) * 1992-01-31 1996-01-30 Niwa; Takashi Key switch with a locking arrangement on a rotating element
GB9326394D0 (en) * 1993-12-24 1994-02-23 Eja Eng Plc Safety switch assemblies
JPH09167546A (ja) * 1995-10-13 1997-06-24 Fuji Electric Co Ltd キー操作式安全スイッチ
DE19602690C1 (de) * 1996-01-26 1997-04-10 Euchner & Co Sicherheitsschalter
DE29720862U1 (de) * 1997-11-25 1998-01-15 Hans Bernstein Spezialfabrik für Schaltkontakte GmbH & Co, 32457 Porta Westfalica Sicherheitsschalter
EP0939415B1 (de) * 1998-02-26 2005-12-14 Idec Izumi Corporation Sicherheitsschalter
GB0214205D0 (en) * 2002-06-19 2002-07-31 Eja Ltd Lockable switch mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0801801B1 (de) * 1993-08-23 1998-06-03 EUCHNER GmbH + Co. Sicherheitsschalter
US5584378A (en) * 1994-02-02 1996-12-17 Bernstein Classic Gmbh & Co. Safety switch assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876622A1 (de) * 2006-07-03 2008-01-09 Siemens Aktiengesellschaft Positionsschalter
US7605335B2 (en) 2006-07-03 2009-10-20 Siemens Aktiengesellschaft Position switch
WO2009095032A1 (de) * 2008-01-29 2009-08-06 Siemens Aktiengesellschaft Sicherheitsschalter mit zuhaltungsfunktion zum zwangsöffnung von kontaktelementen sowie verfahren zum zwangsöffnen von kontaktelementen eines sicherheitsschalters mit verriegelungsfunktion
US8969746B2 (en) 2008-01-29 2015-03-03 Siemens Aktiengesellschaft Safety switch having a hold-closed function for positive opening of contact elements; and method for positive opening of contact elements of a safety switch with a locking function
US20140218139A1 (en) * 2013-02-01 2014-08-07 General Electric Company Electrical operator for circuit breaker and method thereof
US9184014B2 (en) * 2013-02-01 2015-11-10 General Electric Company Electrical operator for circuit breaker and method thereof

Also Published As

Publication number Publication date
US20050109593A1 (en) 2005-05-26
JP2005251726A (ja) 2005-09-15
FR2862810B1 (fr) 2006-01-06
US6982391B2 (en) 2006-01-03
CN1619743A (zh) 2005-05-25
FR2862810A1 (fr) 2005-05-27

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