EP0099223A2 - Déverrouillage électromécanique - Google Patents

Déverrouillage électromécanique Download PDF

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Publication number
EP0099223A2
EP0099223A2 EP83303898A EP83303898A EP0099223A2 EP 0099223 A2 EP0099223 A2 EP 0099223A2 EP 83303898 A EP83303898 A EP 83303898A EP 83303898 A EP83303898 A EP 83303898A EP 0099223 A2 EP0099223 A2 EP 0099223A2
Authority
EP
European Patent Office
Prior art keywords
door
latching
bar
mechanism according
electromagnetic means
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Withdrawn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
EP83303898A
Other languages
German (de)
English (en)
Other versions
EP0099223A3 (fr
Inventor
Rae Keith Vallan
David Wing Kwong Wong
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.)
Vallan Rae Keith
Original Assignee
Guardall Ltd
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 Guardall Ltd filed Critical Guardall Ltd
Publication of EP0099223A2 publication Critical patent/EP0099223A2/fr
Publication of EP0099223A3 publication Critical patent/EP0099223A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C17/00—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith
    • E05C17/56—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by magnetic or electromagnetic attraction or operated by electric or electromagnetic means

Definitions

  • the present invention relates to an automatic release mechanism including electromagnetic means and adapted to hold a door or like member in a first position against the action of a force tending to move that member to a second position, when the electromagnetic means are energised, and to release that member for movement to its second position under the action of said force when the electromagnetic means are de-energised (hereinafter called "a mechanism of the kind stated").
  • Mechanisms of the kind stated are often provided in conjunction with fire doors eg in hospitals and other buildings so that a door can normally be held open by energisation of the electromagnetic means (against the force of a conventional self-closer), to provide unobstructed access through the respective doorway, but is released to close automatically by de-energisation of the electromagnetic means in response to the detection of a fire.
  • Such mechanisms are "fail-safe" in that they require a constant supply of electrical power to keep the door in its open condition and if that power supply should fail for any reason the door will be released to move into its safety condition, ie closed.
  • the devices hitherto available to provide this function do, however, have certain drawbacks.
  • the conventional release mechanism comprises an electromagnet fixed in position adjacent to the door and arranged to cooperate with an armature plate mounted on the door, ie so that the electromagnet holds open the door by direct magnetic attraction.
  • the electromagnet must develop a constant attractive force on the door such as to exceed the force applied by the self-closer and hence these known devices tend to consume undesirably large amounts of power and are generally required to be mains-powered.
  • Another consequence of the high-power operation of known devices is that the magnet tends to become very hot after a continuous period of use and therefore often has to be located adjacent to the top edge of the door to avoid being inadvertently touched. Generally speaking, however, this is not a desirable location from the point of view of wiring-in the device and for maintenance and testing purposes. The excessive heat generated by the device may also itself create a fire hazard.
  • release mechanisms according to the invention may also find application in the control of ordinary (non fire-protection) doors or other like members for different purposes. Also, while described herein in relation to a door which is normally held open by the mechanism and released to close when the electromagnetic means are de-energised, mechanisms according to the invention may equally find application in relation to movable members - such as smoke ventilators - which are normally held closed against the action of a self-opening device and are released to open upon de-energisation of the electromagnetic means.
  • the invention accordingly resides in a mechanism of the kind stated comprising a latching member associated with the electromagnetic means and arranged normally to be held in a latching position by said electromagnetic means when the latter are energised and to be released into an unlatching position when the electromagnetic means are de-energised; and an engaging member biased to adopt a predetermined position in which it is engageable with a portion of the latching member to hold the door or like member in its said first position against the action of said force when the latching member is in its said latching position;.the engaging member being arranged to move away from its said predetermined position against said bias under the action of said force when the latching member moves to its unlatching position, thereby to disengage from the latching member and release the door or like member for movement to its second said position.
  • the latching member comprises a pivotally-mounted bar providing a surface against which the engaging member abuts to hold the door or like member in its first position and which is tilted relative to the engaging member when the bar pivots to its unlatching position so that, in use, the engaging member moves against said surface away from its predetermined position under the action of said force.
  • the engaging member may itself comprise a roller carried between a pair of arms or by other cantilever means pivoted to a mounting member for attachment to the door or like member, with spring means biasing the cantilever means to place the roller in said predetermined position;
  • the closing or equivalent force on the door or like member is resisted through the latching member which in turn is held in its latching position by the electromagnetic means;
  • the mechanical advantage of the latching member can readily be chosen such as to require only a modest magnetic holding force to keep that member in its latching position, and hence the electromagnetic means can be operated at significantly reduced power levels as compared with the conventional form of device described above.
  • mechanisms according to the invention may be set up with either the engaging member or the latching member mounted to the door or the like, while the other of those members is fixed eg to an adjacent wall or other structure so as to achieve the specified engagement between the members when the door or the like is in its said first position.
  • FIG. 1 there is shown a hinged fire door A in a corridor B.
  • This door is normally latched in an open position, as shown in full line, by a mechanism C, so as to provide unrestricted passage through the corridor.
  • the door In the event of a fire, however, the door must close automatically to its broken line position shown in Figure 1.
  • the door is equipped with a conventional self-closer D which applies a continuous closing force to the door in opposition to the mechanism C.
  • the mechanism C includes an electromagnet which, while energised, holds the mechanism in a latching-condition to keep the door open against the force of the self-closer.
  • FIG. 2-4 there is shown one example of a mechanism according to the invention for use as the mechanism C.
  • a mounting plate 1 is fixed over a recess E provided in the wall F adjacent to the edge of the door A (when open) at any suitable height, eg at skirting level.
  • An electromagnet 2 is mounted within the recess by means of a bracket 3 attached to the plate 1.
  • the plate 1 supports a bracket 4 to which an L-shaped latch bar 5 is pivoted by a horizontal pin 6.
  • the bar 5 extends through a slot 7 in the mounting plate 1 and at its inner end carries an armature plate 8 for cooperation with the core 2A of the electromagnet 2 and with the inner limb 3A of the bracket 3 (which provides a return path for magnetic flux when the electromagnet is energised). With energising current supplied to the coil 2B of the electromagnet the plate 8 is normally held by the magnet to maintain the latch bar 5 in the generally horizontal orientation illustrated in Figure 2.
  • a channel-shaped bracket 9 to which a pair of parallel arms 10 are pivoted by a horizontal pin 11.
  • a roller 12 on a pin 13 is carried between the distal ends of the arms 10, and a torsion spring 14 biases the arms to adopt the generally horizontal orientation illustrated in Figure 2.
  • the roller 12 engages behind the nose 15 of the latch bar 5 to hold the door A in its open position, against the force of the self-closer acting in the sense of arrow X. More particularly, the roller 12 engages the flat face 15A of the latch bar, which extends substantially perpendicularly to the direction of "pull" on the door, at a point spaced slightly below the pivot pin 6. There is thus applied to the bar 5 a moment tending to pivot the latter in the anticlockwise sense about pin 6 (as viewed in the Figure). Iiowever, this moment is counteracted by the clockwise moment on the bar due to the attractive force of the electromagnet 2 acting on the armature plate 8.
  • the moment arm of this magnetic force is many times the moment arm of the closing force acting through the roller 12 so that the force of attraction which the magnet 2 has to develop to hold the door open is only a fraction of the applied closing force.
  • the corresponding power consumption of the electromagnet is therefore much lower than that which would be required to hold open the door by direct attraction of an armature plate fixed to the door.
  • the magnet may thus be powered eg from a 24V d.c. supply such as is typically used to operate the detection and control equipment of an associated fire alarm system.
  • the arms 10 can be depressed manually to clear the bottom of the nose 15 and disengage from the latch bar without disturbing the latter.
  • the attraction of the magnet 2 for the plate 8 can be overcome, allowing the latch bar to be moved to "its releasing position of Figure 3;
  • reference numeral 16 indicates a "trimming" potentiometer in series with the magnet coil 2B by which the current through the coil and hence the intensity of the attractive force can be adjusted to determine the amount of "pull" required to override the mechanism in this way.
  • the mechanism can be set or reset into its latched condition from the door-closed condition either by placing the components by hand into their Figure 2 positions or simply by opening the door and pressing the roller 12 against the latch bar nose 15 - this causes the roller to roll down the arcuate surface 15B of the latch bar.and then spring up behind the surface 15A, the same action serving to pivot the latch bar into its latching position if not already in that position.
  • FIG. 5 shows another automatic release mechanism functionally equivalent to the mechanism of Figures 2-4.
  • the latch bar 21 is pivoted on a pin 23 and has a nose portion 24 extending out through a slot 25 at the lower end of the housing 22.
  • the bar 21 carries an armature disc 26 for cooperation with the magnet 20, of which the core is indicated at 20A and the energising coil at 20B.
  • the outer skirt portion 20C of the core 20A provides a return path for magnetic flux when energised. With energising current supplied to the coil 20B the armature disc 26 is normally held by the magnet to maintain the latch bar in the generally vertical orientation illustration in full line in Figure 5.
  • a spring-biased roller 27 mounted to the door A.
  • the roller is carried on stubs 28 at the ends of a pair of moulded plastics arms 29 which straddle a mounting body 30 and are pivoted thereto at 31.
  • the arms 29 are biased to adopt the generally horizontal orientation illustrated in Figure 5 by means of leaf springs 32 moulded on to the arms engaging stops 33 on the body 30.
  • the roller 27 engages the face 24A of the latch bar nose to hold the door open, against the force of the self-closer acting in the sense of arrow X, as in the case of the Figures 2-4 embodiment.
  • the latch bar is allowed to pivot to the broken line position of Figure 5 to tilt the face 24A relative to the roller 27.
  • the roller accordingly rolls down the face 24A to the position indicated in broken line and disengages from the latch bar to permit closure of the door, again as in the case of the Figures 2-4 embodiment.
  • the mechanism can be manually disengaged, and re-set, as described above for the previous'embodiment.
  • a "trimming" potentiometer and the terminal connections for the power supply to the magnet 20 are located in a compartment 34 in the casing part 18.
  • the latch bar and magnet housing 22 is mounted in the cylindrical "well" 17A of the casing part 17 in this embodiment through a circumferential series of intermeshing splines or teeth 35, which enable the housing 22 to be mounted in any one of a number of selected azimuthal orientations relative to the casing 17 and wall F.
  • This is of advantage in aligning the latch bar 21 with the roller 27 in installations where the open door is inclined to the mounting surface for the latch unit (ie, in the case of Figure 1, if the door A opened at an angle to the wall surface F).
  • Reference numeral 36 indicates a buffer pad carried by the body 30 to cushion any impact of the door against the latch unit.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Special Wing (AREA)
EP83303898A 1982-07-09 1983-07-05 Déverrouillage électromécanique Withdrawn EP0099223A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8219941 1982-07-09
GB8219941 1982-07-09
GB8225451 1982-09-07
GB8225451 1982-09-07

Publications (2)

Publication Number Publication Date
EP0099223A2 true EP0099223A2 (fr) 1984-01-25
EP0099223A3 EP0099223A3 (fr) 1985-05-15

Family

ID=26283308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83303898A Withdrawn EP0099223A3 (fr) 1982-07-09 1983-07-05 Déverrouillage électromécanique

Country Status (3)

Country Link
EP (1) EP0099223A3 (fr)
ES (1) ES523979A0 (fr)
GB (1) GB2123891B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167654B1 (en) 1995-04-13 2001-01-02 Michael Wolf Device for operating hinged or guided closures
GB2359335A (en) * 2000-02-19 2001-08-22 Lawrence Michael Griffin Alarm activated doorstop
US20110026203A1 (en) * 2005-12-13 2011-02-03 Chris Ligtenberg Electronic device and magnetic latching mechanism therefore
US20140035302A1 (en) * 2012-07-31 2014-02-06 Airbus Operations Gmbh Door latching device and door assembly incorporating same
US20160356057A1 (en) * 2015-06-03 2016-12-08 HTI Technology & Industries, Inc. Powered latching apparatus
CN106369529A (zh) * 2016-11-24 2017-02-01 广州万构建筑工程设计有限公司 一种自动照明应急设备
CN106500040A (zh) * 2016-11-24 2017-03-15 广州万构建筑工程设计有限公司 一种用于应急照明的装置
CN106524044A (zh) * 2016-11-24 2017-03-22 广州万构建筑工程设计有限公司 一种应急照明设备
US10717390B2 (en) 2016-05-18 2020-07-21 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Console assembly for vehicle interior
US11572723B2 (en) 2019-02-27 2023-02-07 Shanghai Yanfeng Jinqiao Automotive Triim Systems Co. Ltd. Vehicle interior component

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5738392A (en) * 1995-10-12 1998-04-14 Sony Corporation Latch for securing an aircraft video device
RU2750794C1 (ru) * 2020-11-24 2021-07-02 Общество с ограниченной ответственностью "Инженерно-технический центр "ПРОМИКС" Электромеханический замок

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258875A (en) * 1965-05-27 1966-07-05 Barth Safety Equipment Co Inc Electromagnetic door holder and releaser

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258875A (en) * 1965-05-27 1966-07-05 Barth Safety Equipment Co Inc Electromagnetic door holder and releaser

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167654B1 (en) 1995-04-13 2001-01-02 Michael Wolf Device for operating hinged or guided closures
GB2359335A (en) * 2000-02-19 2001-08-22 Lawrence Michael Griffin Alarm activated doorstop
GB2359335B (en) * 2000-02-19 2003-12-24 Lawrence Michael Griffin A doorstop
US20110026203A1 (en) * 2005-12-13 2011-02-03 Chris Ligtenberg Electronic device and magnetic latching mechanism therefore
US8801054B2 (en) 2005-12-13 2014-08-12 Apple Inc. Electronic device and magnetic latching mechanism therefor
US20140035302A1 (en) * 2012-07-31 2014-02-06 Airbus Operations Gmbh Door latching device and door assembly incorporating same
US20160356057A1 (en) * 2015-06-03 2016-12-08 HTI Technology & Industries, Inc. Powered latching apparatus
US11060322B2 (en) * 2015-06-03 2021-07-13 Hti Technology And Industries, Inc. Powered latching apparatus
US10717390B2 (en) 2016-05-18 2020-07-21 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Console assembly for vehicle interior
US10737628B2 (en) 2016-05-18 2020-08-11 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Console assembly for vehicle interior
CN106500040A (zh) * 2016-11-24 2017-03-15 广州万构建筑工程设计有限公司 一种用于应急照明的装置
CN106500040B (zh) * 2016-11-24 2019-04-30 中山市德普电子有限公司 一种用于应急照明的装置
CN106369529B (zh) * 2016-11-24 2019-07-02 广州万构建筑工程设计有限公司 一种自动照明应急设备
CN106524044B (zh) * 2016-11-24 2019-01-18 上海森智照明科技有限公司 一种应急照明设备
CN106524044A (zh) * 2016-11-24 2017-03-22 广州万构建筑工程设计有限公司 一种应急照明设备
CN106369529A (zh) * 2016-11-24 2017-02-01 广州万构建筑工程设计有限公司 一种自动照明应急设备
US11572723B2 (en) 2019-02-27 2023-02-07 Shanghai Yanfeng Jinqiao Automotive Triim Systems Co. Ltd. Vehicle interior component

Also Published As

Publication number Publication date
GB2123891B (en) 1985-10-02
ES8405874A1 (es) 1984-06-16
EP0099223A3 (fr) 1985-05-15
GB8318182D0 (en) 1983-08-03
ES523979A0 (es) 1984-06-16
GB2123891A (en) 1984-02-08

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Owner name: VALLAN, RAE KEITH

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Effective date: 19871030

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18D Application deemed to be withdrawn

Effective date: 19880201

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Inventor name: VALLAN, RAE KEITH

Inventor name: WONG, DAVID WING KWONG