EP0776020A1 - Dispositif d'interrupteur de sécurité - Google Patents

Dispositif d'interrupteur de sécurité Download PDF

Info

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)
English (en)
Other versions
EP0776020B1 (fr
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/de
Priority claimed from DE1996132963 external-priority patent/DE19632963C1/de
Application filed by KA Schmersal GmbH and Co KG filed Critical KA Schmersal GmbH and Co KG
Publication of EP0776020A1 publication Critical patent/EP0776020A1/fr
Application granted granted Critical
Publication of EP0776020B1 publication Critical patent/EP0776020B1/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
    • 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)
  • Power-Operated Mechanisms For Wings (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Component Parts Of Construction Machinery (AREA)
EP96118491A 1995-11-24 1996-11-19 Dispositif d'interrupteur de sécurité Expired - Lifetime EP0776020B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19543769 1995-11-24
DE1995143769 DE19543769A1 (de) 1995-11-24 1995-11-24 Sicherheitsschaltvorrichtung
DE19632963 1996-08-16
DE1996132963 DE19632963C1 (de) 1996-08-16 1996-08-16 Sicherheitsschalteinrichtung

Publications (2)

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

Family

ID=26020628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118491A Expired - Lifetime EP0776020B1 (fr) 1995-11-24 1996-11-19 Dispositif d'interrupteur de sécurité

Country Status (7)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6501040B2 (en) 2001-05-18 2002-12-31 Honeywell International Inc. Dual directional cable actuated emergency stop device
DE20302633U1 (de) * 2003-02-18 2004-07-15 Marantec Antriebs- Und Steuerungstechnik Gmbh & Co. Kg Gesteuerter Antrieb für ein Torblatt o.dgl.
CN104626638B (zh) * 2015-01-05 2016-09-07 李明科 一种数控冲床用连接装置
CN109346365B (zh) * 2018-09-05 2023-09-22 国网山东省电力公司寿光市供电公司 室外用刀闸辅助开关防护罩

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1553550A1 (de) 1965-01-14 1969-08-28 Evers & Co Ab Sperrvorrichtung fuer um eine waagerechte Achse schwenkbare Rauchklappen u.dgl.,welche durch Ausloesen einer temperaturempfindlichen Sicherung oeffnungsfaehig ist
US3689718A (en) * 1971-03-31 1972-09-05 Westinghouse Electric Corp Automatic line switch lock-out
DE2337027A1 (de) * 1973-07-19 1975-02-06 Bosch Siemens Hausgeraete Steuervorrichtung fuer eine automatisch arbeitende waschmaschine
EP0342260A1 (fr) * 1988-05-20 1989-11-23 Hundt & Weber Schaltgeräte GmbH Accouplement flexible pour opération intermittente par exemple entraînement de commutateurs
GB2225826A (en) * 1988-12-07 1990-06-13 Balay Sa Rotary control assembly for appliances
DE4013994A1 (de) 1990-05-01 1991-11-07 Elan Schaltelemente Gmbh Sicherheitseinrichtung zur ueberwachung einer drehbewegung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA596433A (en) * 1960-04-19 T. Kintzing Reese Replaceable cam for limit switch
US1564207A (en) * 1923-05-10 1925-12-08 Cloud John Wills Controlling device for electric circuits
US3316367A (en) * 1965-08-26 1967-04-25 Mc Graw Edison Co Reversible sectionalizing switch
US3440373A (en) * 1967-04-26 1969-04-22 Gen Electric Combined hinge and switch mechanism with pin and slot connection
GB1271010A (en) * 1969-12-30 1972-04-19 Honeywell Ltd Improvements in or relating to cams
US3602662A (en) * 1970-04-30 1971-08-31 Westinghouse Electric Corp Safety mechanism for laundry apparatus
DE2655540C2 (de) * 1975-12-10 1982-02-18 Syntronic AG, Mauren "Zeitprogrammschalter, insbesondere für Wasch-, Spül- und Trockenmaschinen"
US4789761A (en) * 1987-06-22 1988-12-06 Scott Fetzer Company Appliance timer
DE9006391U1 (de) * 1990-06-06 1991-10-10 Marantec Antriebs-und Steuerungstechnik GmbH & Co, Produktions-oHG, 4834 Marienfeld Getriebe zur Überführung einer rotatorischen in eine translatorische Bewegung
US5439252A (en) * 1993-04-22 1995-08-08 Trw Inc. Dual pivot steering column

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1553550A1 (de) 1965-01-14 1969-08-28 Evers & Co Ab Sperrvorrichtung fuer um eine waagerechte Achse schwenkbare Rauchklappen u.dgl.,welche durch Ausloesen einer temperaturempfindlichen Sicherung oeffnungsfaehig ist
US3689718A (en) * 1971-03-31 1972-09-05 Westinghouse Electric Corp Automatic line switch lock-out
DE2337027A1 (de) * 1973-07-19 1975-02-06 Bosch Siemens Hausgeraete Steuervorrichtung fuer eine automatisch arbeitende waschmaschine
EP0342260A1 (fr) * 1988-05-20 1989-11-23 Hundt & Weber Schaltgeräte GmbH Accouplement flexible pour opération intermittente par exemple entraînement de commutateurs
GB2225826A (en) * 1988-12-07 1990-06-13 Balay Sa Rotary control assembly for appliances
DE4013994A1 (de) 1990-05-01 1991-11-07 Elan Schaltelemente Gmbh Sicherheitseinrichtung zur ueberwachung einer drehbewegung

Also Published As

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

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