EP3719822A1 - Contacteur de sécurité pourvu d'arrêt rapide à commande par câble - Google Patents

Contacteur de sécurité pourvu d'arrêt rapide à commande par câble Download PDF

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Publication number
EP3719822A1
EP3719822A1 EP20164211.3A EP20164211A EP3719822A1 EP 3719822 A1 EP3719822 A1 EP 3719822A1 EP 20164211 A EP20164211 A EP 20164211A EP 3719822 A1 EP3719822 A1 EP 3719822A1
Authority
EP
European Patent Office
Prior art keywords
safety switch
shaft
hollow shaft
switch according
unlocking
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
EP20164211.3A
Other languages
German (de)
English (en)
Other versions
EP3719822B1 (fr
Inventor
Andreas Wilting
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 Holding GmbH and Co KG
Original Assignee
KA Schmersal Holding GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KA Schmersal Holding GmbH and Co KG filed Critical KA Schmersal Holding GmbH and Co KG
Publication of EP3719822A1 publication Critical patent/EP3719822A1/fr
Application granted granted Critical
Publication of EP3719822B1 publication Critical patent/EP3719822B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H3/022—Emergency operating parts, e.g. for stop-switch in dangerous conditions
    • H01H3/0226—Emergency operating parts, e.g. for stop-switch in dangerous conditions operated by a pull cord
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H17/00—Switches having flexible operating part adapted only for pulling, e.g. cord, chain
    • H01H17/02—Details
    • H01H17/06—Movable parts
    • H01H17/08—Operating part, e.g. cord
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H17/00—Switches having flexible operating part adapted only for pulling, e.g. cord, chain
    • H01H17/26—Switches having flexible operating part adapted only for pulling, e.g. cord, chain having two flexible operating parts; having a single operating part adapted for pulling at both ends
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/24—Interlocking, locking, or latching mechanisms for interlocking two or more parts of the mechanism for operating contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H17/00—Switches having flexible operating part adapted only for pulling, e.g. cord, chain
    • H01H17/16—Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only
    • H01H17/18—Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only secured to part of the switch driving mechanism that has only angular movement
    • H01H17/22—Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only secured to part of the switch driving mechanism that has only angular movement the contact returning to its original state upon the next application of operating force
    • 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
    • H01H3/022—Emergency operating parts, e.g. for stop-switch in dangerous conditions
    • H01H2003/0246—Resetting of bistable emergency operating part by rotating itself or an accessory
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3031—Means for locking the spring in a charged state
    • 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
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/045—Energy stored by deformation of elastic members making use of cooperating spring loaded wedging or camming parts between operating member and contact structure

Definitions

  • the invention relates to a safety switch with a cable-operated quick shutdown according to the preamble of claim 1.
  • a pull-rope emergency switch device which comprises a housing in which control switches are arranged which can be actuated by an actuating lever via a cam roller.
  • a pull rope running in both directions is generally attached to the actuating lever and is often used for an emergency stop or emergency stop on conveyor and belt systems or other systems.
  • a rip cord is stretched parallel to the corresponding systems, for example. The rip cord can be reached at any point if necessary.
  • the pull cord is operated, the resulting cable deflection is activated by a cable switch that interacts with the pull cord transmitted and this actuated and thereby, for example, a drive device stopped.
  • By pulling one of the two rip cords one of the two forces acting on the lever increases, so that it moves to the corresponding side and rotates around its axis. A pretensioning force of the rip cord is set.
  • the object of the invention is therefore to create a safety switch with a cable-actuated quick disconnection, which provides an improved locking mechanism and is simple to design and manufacture.
  • the locking mechanism of an axial detent is implemented using existing components, so that predeterminable external dimensions of a switch housing can be maintained.
  • the locking mechanism comprises an unlocking shaft guided axially displaceably in the shift drum, for which the shift drum is at least partially as a hollow shaft is trained.
  • Shift drum and unlocking shaft are thus preferably coaxially displaceable shafts, the rotational mobility of which is coupled in order to form preferably only a slight rotatability relative to one another instead of a rigid coupling. Slight tensile forces acting on the ripcord can then be buffered without causing an emergency shutdown.
  • the hollow shaft then forms an outer shaft which receives the unlocking shaft as an inner shaft that can be displaced in the hollow shaft.
  • the hollow shaft has, for example, a polygonal outer cross section and is particularly preferably designed as a hexagonal shaft.
  • the axial displaceability of the unlocking shaft can also be spring-preloaded with respect to the hollow shaft.
  • the hollow shaft which is preferably mounted in a stationary manner in the switch housing, accommodates an energy store for driving the unlocking shaft.
  • the unlocking shaft is thereby enabled to move the locking member guided by it with respect to a counter bearing.
  • a compression spring in particular also a gas compression spring, is preferably provided as the energy store. The compression spring can preload the unlocking shaft with respect to the hollow shaft in a preload position in which the locking member is supported in a spring-preloaded manner on a counter bearing.
  • the associated rotation of the unlocking shaft with the attached locking member leads to a change in position of the locking member into a disengaged position with respect to the counter bearing.
  • the energy storage of the compression spring can be relieved and causes an axial displacement of the locking member.
  • the counter bearing has latching surfaces that prevent the locking member from rotating back, preferably by a mechanical stop.
  • the disengaged position is thus an axial detent position. Rotation of the shift drum back into its starting position, in particular the shift position, is only possible by charging the energy store, that is to say re-tensioning the compression spring, for example by pulling back the unlocking shaft.
  • the unlocking shaft preferably has an unlocking button at its free end.
  • the switching drum can have cam disks for actuating the switching contacts, for which purpose a pivotable actuating lever is preferably provided.
  • spring-loaded detents can be provided in a known manner.
  • the invention relates to a safety switch with a cable-operated quick shutdown.
  • the safety switch comprises a housing 1 with switching contacts (not shown) arranged in the housing 1 and with a switching drum 2 operating on the switching contacts.
  • An actuating device 3 to which a cable 4 is connected acts on the switching drum 2.
  • the shift drum 2 is at least partially designed as a hollow shaft 5, in which an unlocking shaft 6 coupled to the hollow shaft 5 in the direction of rotation is arranged so as to be spring-pretensioned and axially displaceable.
  • the unlocking shaft 6 carries an unlocking handle 7 at one end on the actuation side.
  • the locking member 8 determines in an engagement position with a counter bearing 9, which is fixed to the housing, a spring-preloaded axial stroke X of the unlocking shaft 6, which moves the locking member 8 in a disengaged position for an axial detent of the shift drum 2 after a quick disconnection of the hollow shaft 5.
  • the actuating device 3 is preferably designed as a pivotable actuating lever. Furthermore, the unlocking shaft 6 is received, preferably guided, in the hollow shaft 5. So that the locking member 8 is rotatably displaceable on the hollow shaft 5, the hollow shaft 5 preferably has a non-circular outer cross section.
  • the hollow shaft 5 is particularly preferably a polygonal shaft, for example a hexagonal shaft.
  • the unlocking shaft 6 can preferably be coupled axially displaceably to the hollow shaft 5 via at least one groove-guided driving pin 10.
  • the hollow shaft 5 has an axially extending guide groove 11 which defines the displacement path of the locking member 8 in the axial direction, for example through an axially extending elongated hole.
  • the at least one driver pin 10 also fixes the locking member 8 on the unlocking shaft 6.
  • the locking member 8 is designed, for example, as a locking disk.
  • the hollow shaft 5 forms a straight guide on the outside, on which the locking member 8, coupled to the unlocking shaft 6, is non-rotatably guided and is movably mounted in the manner of a slide via the guide groove 11 in the hollow shaft 5 or the shift drum 2.
  • the locking member 8, the unlocking shaft 6 and the driver pin 10 thus form a linear movement unit which is guided on the hollow shaft 5 of the shift drum 2.
  • the counter bearing 9 can be formed by an end face 12 of a box-like stop.
  • the box-like stop is preferably positioned fixed to the housing.
  • the spring preload of the unlocking shaft 6 by means of, for example, a compression spring 13 is preferably selected such that when the locking disk 8 rests against the end face 12 of the box-like stop, the unlocking shaft 6 is preloaded with the spring-preloaded axial stroke X in a switching position, as in FIG Fig. 3 is shown.
  • the locking member 8 preferably has a leg-shaped extension 14. How Fig. 6 shows, the locking member 8 with extension 14 relative to the end face 12 of the box-like stop can be rotated into a disengaged position when the hollow shaft 5 rotates and thereby exceeds a predetermined angle of rotation.
  • the pretensioned spring 13 can release the axial stroke X, since the locking member 8 can advance axially into a latching position, as in FIG Fig. 5 is shown. Because the box-like stop of the counter-stop 9 has side surfaces 15 against which the leg-shaped extension 14 of the locking member 8 can rest laterally, there is a latching position for the shift drum 2, since it cannot turn back into the shift position. This prevents the locking member 8. Only through an inverse axial stroke X, the locking member 8 can be reset into the spring-loaded engagement position, as in FIG Fig. 3 is shown.
  • the switching drum 2 carries cam disks 16 in a known manner, by means of which switching contacts 17 can be actuated, for which purpose the actuating device 3 can be deflected in the form of a pivotable actuating lever, as in FIG Fig. 1 and Fig. 3 as well as Fig. 4 and Fig. 6 is shown.
  • Fig. 1 also shows that the actuating device can preferably be connected to a pull cord 4 on two opposite sides.
  • the locking disk 8 leaves the area of the counter bearing 9 and is pushed forward by the pretensioned spring 13, i.e. inside the housing, pushed.
  • the new position of the locking disk 8 no longer allows the shift drum 2 to be reset to the 0 ° position.
  • the leg 14 of the locking disk 8 now rests laterally on the counter bearing 9 of the housing 1 or the side surfaces 15 (locked).
  • the system is reset by pulling the unlocking handle 7 and thus pulling the locking disk 8 out of the area of the counter bearing 9.
  • actuator 3 of the safety switch can be manually moved to the 0 ° position.

Landscapes

  • Mechanical Control Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP20164211.3A 2019-04-05 2020-03-19 Contacteur de sécurité pourvu d'arrêt rapide à commande par câble Active EP3719822B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019002492.3A DE102019002492B4 (de) 2019-04-05 2019-04-05 Sicherheitsschalter mit seilbetätigbarer Schnellabschaltung

Publications (2)

Publication Number Publication Date
EP3719822A1 true EP3719822A1 (fr) 2020-10-07
EP3719822B1 EP3719822B1 (fr) 2021-12-29

Family

ID=69846323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20164211.3A Active EP3719822B1 (fr) 2019-04-05 2020-03-19 Contacteur de sécurité pourvu d'arrêt rapide à commande par câble

Country Status (4)

Country Link
EP (1) EP3719822B1 (fr)
CN (1) CN111799108B (fr)
DE (1) DE102019002492B4 (fr)
ES (1) ES2909413T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112768272B (zh) * 2020-12-28 2022-10-28 施耐德万高（天津）电气设备有限公司 一种双电源转换开关的手自动及挂锁结构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935420C2 (de) 1979-09-01 1980-12-04 Kiepe Elektrik Gmbh, 4000 Duesseldorf Elektrische Ausschaltvorrichtung, insbesondere Seilzugnotschaltvorrichtung
DE3508302A1 (de) * 1985-03-08 1986-09-11 Fernsprech- und Signalbau KG Schüler & Vershoven, 4300 Essen Seilzugschalter
DE3539766C2 (fr) 1985-03-08 1987-08-13 Fernsprech- Und Signalbau Kg Schueler & Vershoven, 4300 Essen, De
DE29818422U1 (de) * 1998-10-15 1998-12-24 Kiepe Elektrik Gmbh & Co Kg Seilzug-Notschaltvorrichtung
DE19725491C1 (de) * 1997-06-17 1999-03-11 Asg Luftfahrttechnik Und Senso Schaltvorrichtung, insbesondere Reißleinen-Notschalter oder Bandschieflaufschalter
DE102015111071A1 (de) 2015-07-08 2017-01-12 Vossloh Kiepe Gmbh Schaltvorrichtung mit einer Reißleine

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US3956606A (en) 1974-04-25 1976-05-11 Material Control, Inc. Cable operated safety stop switch
GB9524297D0 (en) * 1995-11-28 1996-01-31 Eja Eng Plc Switch assemblies
US7022930B2 (en) * 2003-12-04 2006-04-04 Honeywell International Inc. Single directional cable actuated emergency stop device
DE102009050815A1 (de) * 2009-10-27 2011-04-28 Emka Beschlagteile Gmbh & Co. Kg Schwenkhebelverschluss mit geteilter Betätigungswelle
CN203836176U (zh) * 2014-04-28 2014-09-17 陕西法士特齿轮有限责任公司 一种操纵机构
CN104036980A (zh) * 2014-05-12 2014-09-10 宿州中矿三杰科技有限公司 矿用本质安全型急停开关
CN104282477B (zh) * 2014-10-14 2017-02-15 武汉菲舍控制技术有限公司 一种野外作业拉绳开关
CN105570354B (zh) * 2014-10-31 2019-04-05 德昌电机(深圳)有限公司 线性制动器
CN105225862B (zh) * 2015-09-28 2017-07-28 平高集团有限公司 一种弹簧操动机构及其手动储能装置
US9824841B2 (en) * 2015-11-17 2017-11-21 Rockwell Automation Technologies, Inc. Safety switch and associated methods

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935420C2 (de) 1979-09-01 1980-12-04 Kiepe Elektrik Gmbh, 4000 Duesseldorf Elektrische Ausschaltvorrichtung, insbesondere Seilzugnotschaltvorrichtung
DE3508302A1 (de) * 1985-03-08 1986-09-11 Fernsprech- und Signalbau KG Schüler & Vershoven, 4300 Essen Seilzugschalter
DE3539766C2 (fr) 1985-03-08 1987-08-13 Fernsprech- Und Signalbau Kg Schueler & Vershoven, 4300 Essen, De
DE19725491C1 (de) * 1997-06-17 1999-03-11 Asg Luftfahrttechnik Und Senso Schaltvorrichtung, insbesondere Reißleinen-Notschalter oder Bandschieflaufschalter
DE29818422U1 (de) * 1998-10-15 1998-12-24 Kiepe Elektrik Gmbh & Co Kg Seilzug-Notschaltvorrichtung
DE102015111071A1 (de) 2015-07-08 2017-01-12 Vossloh Kiepe Gmbh Schaltvorrichtung mit einer Reißleine

Also Published As

Publication number Publication date
EP3719822B1 (fr) 2021-12-29
CN111799108A (zh) 2020-10-20
ES2909413T3 (es) 2022-05-06
DE102019002492B4 (de) 2021-08-19
CN111799108B (zh) 2022-10-28
DE102019002492A1 (de) 2020-10-08

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