EP0982454A1 - Dispositif de verrouillage pour un panneau de plafond - Google Patents

Dispositif de verrouillage pour un panneau de plafond Download PDF

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Publication number
EP0982454A1
EP0982454A1 EP99305564A EP99305564A EP0982454A1 EP 0982454 A1 EP0982454 A1 EP 0982454A1 EP 99305564 A EP99305564 A EP 99305564A EP 99305564 A EP99305564 A EP 99305564A EP 0982454 A1 EP0982454 A1 EP 0982454A1
Authority
EP
European Patent Office
Prior art keywords
detent pin
access panel
pin
track portion
panel
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Withdrawn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
EP99305564A
Other languages
German (de)
English (en)
Inventor
Tim Pryce-Hall
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.)
BPB Ltd
Original Assignee
BPB 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 BPB Ltd filed Critical BPB Ltd
Priority to EP99305564A priority Critical patent/EP0982454A1/fr
Publication of EP0982454A1 publication Critical patent/EP0982454A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/003—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation with movable parts, e.g. pivoting panels, access doors

Definitions

  • the invention relates to ceiling access panels and provides a safety latch mechanism for such access panels.
  • a safety latch mechanism permits the safe controlled opening of a ceiling access panel.
  • Access panels for suspended false ceilings can be very heavy.
  • a typical construction for such an access panel could be a steel panel hinged to a frame which is incorporated into the metal grid which supports the suspended ceiling, and one or more ceiling tiles carried on the underside of the steel panel.
  • the steel panel generally has a down-turned rim and the ceiling tiles slot into a channel formed by an inturned flange of that rim.
  • the entire structure may weigh some tens of kilograms, which means that opening the access panel can be quite hazardous. Once released, the access panel can swing violently downwards, risking injury to the person attempting to gain access to the void space above the suspended ceiling.
  • ceiling access panels have a bolt or budget lock for restraining them in their fully closed condition.
  • the user has to use one hand to unlock the panel for example by inserting a key and turning the budget lock.
  • the panel is then held by a safety mechanism in a partially open condition and prevented from falling open in an uncontrolled fashion. This enables the user to re-position himself before taking the entire weight of the panel.
  • GB-B-2213507 discloses one method of controlling the descent of the panel, using a tape brake mechanism. That brake mechanism is however mounted close to the hinged edge of the access panel and so it exerts a very substantial torque on the ceiling grid from which the panel is suspended. Also it is not easy for anyone unfamiliar with the brake mechanism to work out without instruction how to lower the panel by a series of lift and release movements.
  • the invention provides a safety latch mechanism for a ceiling access panel pivotally mounted in a frame, comprising:
  • the detent pin is mounted on one of the access panel and frame and the guide and holding member is mounted on the other.
  • a pair of oppositely handed latch mechanisms is provided, located one on each edge of the access panel and frame at locations remote from the hinge, near to the leading opening edge of the access panel.
  • the or each detent pin is at the junction of the first and second track portions.
  • the panel would then be arrested by the or each detent pin being located in its associated holding cup at the end of the second track portion. That temporary arrest gives the user time to re-position himself if necessary, take the full weight of the panel with both hands, and lift the panel slightly until the or each detent pin traverses the associated third track portion and exits the guide and holding member via the open mouth portion
  • the non-return barrier ensures that the detent pin progresses from the first to the second track portion and does not return down the first track portion on release of the panel from its closed and locked condition.
  • the barrier may be a resiliently displaceable barrier which is cammed out of the path of the pin as the pin proceeds upwardly through the first track portion, but which springs back behind the pin to prevent return movement of the pin when the pin clears the first track portion and barrier.
  • the barrier may be a fixed ramp and the pin itself may be axially movable to ride up the ramp and spring back down on the other side when the pin clears the ramp.
  • a similar non-return barrier may if desired be provided at the end of the second track portion, to prevent return of the detent pin from the holding cup, back along the second track portion.
  • the second non-return barrier is, however, an optional feature since the lateral spring bias on the detent pin does in itself tend to deter the detent pin from re-entering the second track portion.
  • the safety latch mechanism of the invention is particularly suitable for use with a ceiling access panel as described and claimed in our copending Patent Application No. EP filed herewith and entitled "Access panel assembly for a false ceiling or firewall”.
  • the safety latch mechanism illustrated comprises a spring-biased laterally movable detent pin housed in a mounting block for mounting on one edge portion of a ceiling access panel or a frame in which the ceiling access panel is pivotally mounted; and a guide and holding member as illustrated in Figures 3 to 9 for mounting on the other of the ceiling access panel and mounting frame, in relative positions such that the detent pin is received in the track of the guide and holding member as the access panel is opened and closed.
  • FIG. 1 there is shown a mounting block 1 in which a detent pin is laterally movable in the direction of the double-headed arrow X-Y .
  • the detent pin extends through a slot 3 in the mounting block 1, and is mounted on or formed integrally with a slide plate 4 which is guided internally of the block 1 for movement in a straight line only.
  • a torsion spring 5 biases the detent pin in the direction of the arrow-head X as shown in Figure 2, but it can be moved against the bias of that spring in the direction Y .
  • the block 1 can be firmly secured to the ceiling access panel or frame by means of bolts (not shown) passing through mounting apertures 6.
  • Figures 3 to 9 illustrate the guide and holding member which defines a cyclic track for receiving and guiding the end of the detent pin 2 as the access panel is opened and closed.
  • the guide and holding member comprises a block 10 into which is formed a channel comprising an open mouth portion 11, a first track portion 12, a second track portion 13, a holding cup 14 and a third track portion 15.
  • Figure 4 shows three successive positions of the detent pin 2, namely a position 2' entering the open mouth 11 of the track; a position 2" at the uppermost portion of the track between the first track portion 12 and the second track portion 13; and a position 2"' when resting in the holding cup 14. Also in Figure 4 there is shown a first arrow P depicting the movement of the detent pin through the first track portion 12; an arrow Q depicting the motion of the detent pin 2 through the second track portion 13; and an arrow R depicting the motion of the detent pin 2 through the third track portion 15. It will be appreciated that Figures 4 to 9 are schematic only in the sense that the detent pin 2 would in practice contact the wall of the track, although for illustrative purposes only the drawings show a spacing between the pin and the track wall.
  • a non-return barrier 16 is provided in the first track portion 12, and comprises a spring-loaded depressable ramp 17 leading to a detent shoulder 18.
  • the detent pin 2 passes up the first track portion 12 in the direction of the arrow P, it depresses the ramp portion 17 of the non-return barrier 16 as illustrated in Figures 5 and 7, so that it can pass to the position 2" shown in Figures 4, 6 and 8, when the non-return barrier 16 springs up behind the detent pin and forms, through its shoulder 18, a barrier for preventing return movement of the detent pin 2 back down the first track portion 12 in a direction opposite to that of the arrow P.
  • An entirely analogous second non-return barrier 19 is provided in the second track portion 13, as illustrated in Figures 6 and 9, for preventing return movement of the detent pin from the position 2"' back up the second track portion 13 in a direction opposite to that of the arrow Q.
  • the block 1 is secured fast to an edge portion of a ceiling access panel, near to the leading opening edge which is the edge remote from the hinge.
  • the guide and holding member 10 would then be secured (by means not illustrated) to the corresponding edge of the frame, so that when the ceiling access panel is closed the detent pin 2 enters the open mouth 11 of the guide and holding member 10.
  • the detent pin 2 contacts the upper surface of the first track portion 12 and is cammed laterally in its slot 3 in the direction of the arrow-head Y of Figures 1 and 2.
  • the ceiling access panel is fully closed, and the user can lock the access panel in that closed position by means of a bolt or budget lock (not shown).
  • the user would typically support the weight of the ceiling access panel with one hand while using the other hand to unbolt or unlock the panel. That would leave the user trying to support the weight of the access panel and control its opening movement with one hand, which might be difficult or impossible bearing in mind that the access panel is likely to be extremely heavy, and the user could be standing on an elevated platform or a ladder to be able to reach the ceiling access panel.
  • the safety latch mechanism of the invention permits the ceiling access panel to fall heavily under its own weight without swinging fully open.
  • the access panel On release of the securing bolt, the access panel starts to open but the detent pin 2 simply passes down the second track portion Q to the position 2"', when it is received in the holding cup 14.
  • the user can then re-position himself, obtain a better grip on the access panel if necessary, and using both hands lift the access panel slightly until the detent pin 2 under the bias of the torsion spring 5 traverses the third track portion 15 in the direction of the arrow R and exits the open mouth 11 of the guide and holding member 10.
  • the second non-return barrier 19 may if desired be omitted, because the torsion spring 5 acting on the detent pin 2 does in fact impart a lateral bias on the pin, urging it to move from the position 2"' in the direction of the arrow R in preference to passing in the wrong direction up the second track portion 13.
  • the second non-return barrier 19 can, however, be provided at relatively little additional expense by forming the first and second barriers 16 and 19 from the same piece of bent spring steel.
  • the non-return barriers 17 and 19 could be fixed ramps in association with a detent pin 2 that is axially movable as well as being laterally movable. The pin 2 would then ride up each in turn of the two fixed ramps 17 and 19, passing a point of no return when it clears the top-most shoulder of each respective ramp.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Hinges (AREA)
EP99305564A 1998-08-21 1999-07-14 Dispositif de verrouillage pour un panneau de plafond Withdrawn EP0982454A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99305564A EP0982454A1 (fr) 1998-08-21 1999-07-14 Dispositif de verrouillage pour un panneau de plafond

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98306702 1998-08-21
EP98306702 1998-08-21
EP99305564A EP0982454A1 (fr) 1998-08-21 1999-07-14 Dispositif de verrouillage pour un panneau de plafond

Publications (1)

Publication Number Publication Date
EP0982454A1 true EP0982454A1 (fr) 2000-03-01

Family

ID=26151406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99305564A Withdrawn EP0982454A1 (fr) 1998-08-21 1999-07-14 Dispositif de verrouillage pour un panneau de plafond

Country Status (1)

Country Link
EP (1) EP0982454A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011001033A1 (fr) * 2009-07-03 2011-01-06 Kone Corporation Procédé et agencement pour ouvrir et fermer un plafond suspendu, ou analogue, d'une cabine d'ascenseur, et dispositif de verrouillage
CN107859225A (zh) * 2017-09-29 2018-03-30 浙江未来加电子商务有限公司 吊顶饰面板收口板块自动卡接结构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2090473A (en) * 1934-09-01 1937-08-17 Atwood Vacuum Machine Co Automobile hood support
US2817554A (en) * 1956-09-13 1957-12-24 Stanley Works Push release latch
DE1246980B (de) * 1961-08-21 1967-08-10 Hugo Jeker Schnaepperartige Vorrichtung zum loesbaren Verbinden von plattenfoermigen Bauelementen mit Baukonstruktionen
GB2134961A (en) * 1983-01-31 1984-08-22 Issin Kenkyusho Kabushiki Kais Door catches
FR2546047A1 (fr) * 1983-05-16 1984-11-23 Jardel Fernand Mecanisme d'ouverture pour porte ou tiroir de meuble de rangement, en particulier pour classeur de planches de dessin
US5211430A (en) * 1992-07-28 1993-05-18 Song Ye Industrial Co., Ltd. Hidden lock for a jewelry box
US5595028A (en) * 1995-01-31 1997-01-21 Handzlik; Walter A. Truss roof and floor joist storage device
DE29702278U1 (de) * 1997-02-10 1997-04-03 Chang, Chang Ching, Yen-Pu Hsiang, Ping-Tung Verriegelungs- und Entriegelungssteuervorrichtung für Schubladen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2090473A (en) * 1934-09-01 1937-08-17 Atwood Vacuum Machine Co Automobile hood support
US2817554A (en) * 1956-09-13 1957-12-24 Stanley Works Push release latch
DE1246980B (de) * 1961-08-21 1967-08-10 Hugo Jeker Schnaepperartige Vorrichtung zum loesbaren Verbinden von plattenfoermigen Bauelementen mit Baukonstruktionen
GB2134961A (en) * 1983-01-31 1984-08-22 Issin Kenkyusho Kabushiki Kais Door catches
FR2546047A1 (fr) * 1983-05-16 1984-11-23 Jardel Fernand Mecanisme d'ouverture pour porte ou tiroir de meuble de rangement, en particulier pour classeur de planches de dessin
US5211430A (en) * 1992-07-28 1993-05-18 Song Ye Industrial Co., Ltd. Hidden lock for a jewelry box
US5595028A (en) * 1995-01-31 1997-01-21 Handzlik; Walter A. Truss roof and floor joist storage device
DE29702278U1 (de) * 1997-02-10 1997-04-03 Chang, Chang Ching, Yen-Pu Hsiang, Ping-Tung Verriegelungs- und Entriegelungssteuervorrichtung für Schubladen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011001033A1 (fr) * 2009-07-03 2011-01-06 Kone Corporation Procédé et agencement pour ouvrir et fermer un plafond suspendu, ou analogue, d'une cabine d'ascenseur, et dispositif de verrouillage
CN102471027A (zh) * 2009-07-03 2012-05-23 通力股份公司 用于打开和闭合电梯轿厢的吊顶的方法和装置及锁闭设备
US8925980B2 (en) 2009-07-03 2015-01-06 Kone Corporation Method and arrangement for opening and closing a suspended ceiling of an elevator car, and locking device
CN102471027B (zh) * 2009-07-03 2015-07-15 通力股份公司 用于打开和闭合电梯轿厢的吊顶的方法和装置及锁闭设备
CN107859225A (zh) * 2017-09-29 2018-03-30 浙江未来加电子商务有限公司 吊顶饰面板收口板块自动卡接结构
CN107859225B (zh) * 2017-09-29 2023-12-12 浙江亚厦装饰股份有限公司 吊顶饰面板收口板块自动卡接结构

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