EP0291376B1 - Actuation machanism for a fume extraction hood - Google Patents

Actuation machanism for a fume extraction hood Download PDF

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Publication number
EP0291376B1
EP0291376B1 EP88401015A EP88401015A EP0291376B1 EP 0291376 B1 EP0291376 B1 EP 0291376B1 EP 88401015 A EP88401015 A EP 88401015A EP 88401015 A EP88401015 A EP 88401015A EP 0291376 B1 EP0291376 B1 EP 0291376B1
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EP
European Patent Office
Prior art keywords
spring
strut
hood
lifter
opening
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.)
Expired - Lifetime
Application number
EP88401015A
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German (de)
French (fr)
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EP0291376A1 (en
Inventor
Antoine Reeb
Bernard Zimmer
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Industrielle Du Haras SA Ste
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Industrielle Du Haras SA Ste
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Publication of EP0291376A1 publication Critical patent/EP0291376A1/en
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Publication of EP0291376B1 publication Critical patent/EP0291376B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/002—Closers or openers for wings, not otherwise provided for in this subclass controlled by automatically acting means
    • E05F1/006—Closers or openers for wings, not otherwise provided for in this subclass controlled by automatically acting means by emergency conditions, e.g. fire
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E04D13/03—Sky-lights; Domes; Ventilating sky-lights
    • E04D13/035—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts
    • E04D13/0351—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts the parts pivoting about a fixed axis
    • E04D13/0352—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts the parts pivoting about a fixed axis the parts being of domed or pyramidal shape
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/1091—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a gas spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/02—Roof ventilation
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/1041—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis
    • E05F1/1066—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis with a traction spring
    • E05F1/1075—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis with a traction spring for counterbalancing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefore
    • E05Y2201/404—Motors; Magnets; Springs; Weights; Accessories therefore characterised by the function
    • E05Y2201/422—Motors; Magnets; Springs; Weights; Accessories therefore characterised by the function for opening
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Application of doors, windows, wings or fittings thereof for buildings or parts thereof characterised by the type of wing
    • E05Y2900/148—Windows
    • E05Y2900/152—Roof windows
    • E05Y2900/154—Skylights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
    • F24F11/34—Responding to malfunctions or emergencies to fire, excessive heat or smoke by opening air passages

Definitions

  • the invention which relates to a mechanism for operating the dome of a smoke outlet relates more precisely to a mechanism with a jack and a pivoting rod capable of ensuring tilting at more than 90 ° of the movable folding element forming the dome of the outlet.
  • This folding element or dome which forms the movable cover of a smoke outlet must be able to open widely beyond a 90 ° opening, and fold down in the direction of the neighboring roof, this to openly clear the opening, and allow rapid and correct evacuation of any fumes accumulated in the room.
  • these domes do not remain open in a vertical or semi-vertical position or they would form deflectors for the winds and would thus risk opposing the release of smoke.
  • standards require that these domes open widely to allow possible emergency access by opening from the roof, without being hampered by a bulky opening mechanism.
  • a dome operating mechanism which also uses a pivoting link and a jack, but which also introduces a damping cylinder attached to the end of the link, which acts as a stop and which dampens the opening movement.
  • This shock absorber rests on a cross member extending from one end to the other of the opening and it must be particularly well positioned so that its rod is retracted when the dome passes from the half-open position to the fully folded position .
  • the damper does not participate in its opening, but rather constitutes a brake on deployment.
  • the use of such a damping cylinder therefore makes the adjustment of the opening mechanism more delicate, regardless of the fact that it is expensive, more difficult to assemble and of uncertain longevity and operating reliability.
  • the operating mechanism is extremely simple and it easily finds its place on a lateral face of the box or the curb of the dome, and it reacts immediately and flexibly to the command to open the security device by authorizing the reclosing to using a traditional winch system.
  • An object of the present invention therefore consists of a mechanism for operating the dome of a smoke outlet articulated on a ridge of a curb delimiting the opening of the outlet using a participating jack. at the opening of said dome bearing on a pivoting rod making it possible to increase the range of the jack, and using a damper member for the pivoting movement of said mechanism linker according to which the damper member is a spring which is hung from one side at the end of the swivel link and the other at a fixed point, and which is mounted in such a way that in the non-banded equilibrium position it keeps the link substantially aligned with it and according to which the point of the retractable rod of the jack bears on the end of said link near the point of attachment of the spring.
  • the spring in the closed position of the dome, the spring is stretched between the fixed point and the end of the rod bent downwards, and exerts a pushing force on the rod of the jack; moreover, in the non-banded equilibrium position of the spring corresponds an opening position at 90 ° to the dome for which the jack is relaxed, and in the open and folded position of the dome, the spring is tensioned between the fixed point and the end of the rod bent upwards, and exerts a retaining force on the cylinder rod.
  • FIG. 1 There is shown in Figures 1 and 2 a smoke outlet whose dome 1 is articulated by hinges 2 on an edge of a curb 3 reported on the roof of a room and which defines an opening 4.
  • the dome in position closure is locked on the curb 3 by a fuse latch 15, intended to release the opening of the dome in the event of an abnormal rise in temperature at the opening 4.
  • the amount of the dome, on the side opposite the hinges 2 also has a socket 16 for hooking a reclosing cable according to an arrangement known per se.
  • a plate 5 mounted on an internal face of the curb perpendicular to the axis of the hinges 2 serves to support the mechanism for operating the dome, an important element of which is a conventional cylinder 6 with CO2.
  • the end of the body of the jack 6 is articulated on a lateral upright of the dome along an axis 7 disposed substantially in the middle of this upright.
  • the tip of the rod 8 of the jack 6 is articulated on one end 9 of a link 10 of which another end pivots about a horizontal axis 11, housed in a stirrup 12, said stirrup being mounted on one side of deck 5.
  • the spring 13 constitutes an essential component of the mechanism.
  • the jack 6 occupies a position slightly inclined where it is placed along a lateral internal wall of the curb 3.
  • the rod 8 of the jack is then forced back inside the body of the jack by bearing on the end 9 of the rod 10.
  • the pressing force of the actuator rod thus causes the downward inflection of the rod 10, inflection thwarted by the force of the spring 13.
  • the spring and the rod are no longer aligned and form a broken line, as shown.
  • the spring 13 is bandaged and exerts a permanent force on the rod 8 of the jack. This action has no effect because the dome is locked on the curb 3 by the fuse latch 15.
  • the spring 13 gives the mechanism an elasticity which allows correct locking of the dome without precise adjustment. The locking will function despite the constructive differences of the jacks used (compression force - stroke of the rod 8), the spring 13 being able to compensate by a more or less large elongation for the small variations inherent in each assembly.
  • the dome 1 has slightly exceeded the vertical position at 90 ° relative to the roof, when the jack is relaxed. This means that from this moment, the dome continues its tilting movement under the effect of its own weight.
  • the spring and the rod bend upward, the spring tensing and this time playing the role of organ retaining cylinder and dome which can thus reach an opening of about 140 °, sufficient to meet the security and control requirements specific to these outlets.
  • the spring 13 dampens and slows down the opening movement before immobilization of the dome. There is therefore, thanks to the spring, no sudden in this movement whose opening phase from unlocking to arrival is gradually accelerated and then gradually slowed down.
  • the spring 13 limits the pivoting stroke of the rod 10 and therefore of the dome. In the absence of a spring, the dome would not be retained and would fall on the roof unless another support system was added to it. If in place of the spring a rigid rod was used, the dome would serve as an abrupt stop in its movement and would be damaged.
  • An advantage of this spring retaining system also lies in the fact that the dome comes to a standstill at around 140 ° which allows it to be closed using a winch and a pulling cable coming from hang on socket 16.
  • the mechanism thus easily lends itself to testing the opening of the dome and to verifying its correct operation.
  • a covering plate, not shown, forming a casing is attached above the plate 5 from which it hides the mechanism.
  • this plate is profiled in order to improve the ventilation coefficient of the outlet.

Description

L'invention qui a pour objet un mécanisme de manoeuvre de la coupole d'un exutoire de fumées concerne plus précisément un mécanisme à vérin et biellette pivotante apte à assurer un basculement à plus de 90° de l'élément rabattable mobile formant la coupole de l'exutoire.The invention which relates to a mechanism for operating the dome of a smoke outlet relates more precisely to a mechanism with a jack and a pivoting rod capable of ensuring tilting at more than 90 ° of the movable folding element forming the dome of the outlet.

Cet élément rabattable ou coupole qui forme le capot mobile d'un exutoire de fumées doit pouvoir s'ouvrir largement au-delà d'une ouverture à 90°, et se rabattre en direction du toit voisin, cela pour dégager franchement l'ouverture, et permettre l'évacuation rapide et correcte des fumées éventuellement accumulées dans le local. Sur le plan sécurité, il est également important que ces coupoles ne restent pas ouvertes en position verticale ou semi-verticale ou elles formeraient des déflecteurs pour les vents et risqueraient ainsi de s'opposer au dégagement des fumées. Enfin les normes exigent que ces coupoles s'ouvrent largement pour permettre l'accès éventuel d'urgence par l'ouverture à partir du toit, sans être géné par un mécanisme d'ouverture encombrant.This folding element or dome which forms the movable cover of a smoke outlet must be able to open widely beyond a 90 ° opening, and fold down in the direction of the neighboring roof, this to openly clear the opening, and allow rapid and correct evacuation of any fumes accumulated in the room. In terms of safety, it is also important that these domes do not remain open in a vertical or semi-vertical position or they would form deflectors for the winds and would thus risk opposing the release of smoke. Finally, standards require that these domes open widely to allow possible emergency access by opening from the roof, without being hampered by a bulky opening mechanism.

Il existe déjà des systèmes permettant à la coupole rabattable d'effectuer un basculement à 180°, qui mettent en oeuvre un levier pivotant associé à un vérin de manoeuvre du telle sorte qu'à partir d'une certaine course d'ouverture de l'élément, le pivotement du levier augmente la portée du vérin et l'ouverture du capot. Les systèmes connus nécessitent cependant un jeu de butées empêchant le levier pivotant de bouger pendant la première phase d'ouverture, et imposent un vérin qui, en position fermée de l'élément rabattable, déborde vers le bas à l'intérieur de l'orifice.There are already systems allowing the folding dome to perform a 180 ° tilting, which implement a pivoting lever associated with an actuating cylinder so that from a certain opening stroke of the element, the pivoting of the lever increases the range of the jack and the opening of the cover. Known systems, however, require a set of stops preventing the pivoting lever from moving during the first opening phase, and impose a jack which, in the closed position of the folding element, projects downwards inside the orifice. .

On connaît aussi par le DE-A-3143318, un mécanisme de manoeuvre d'une coupole qui utilise également une biellette pivotante et un vérin, mais qui introduit en plus un cylindre amortisseur accroché à l'extrémité de la biellette, qui fait office de butée et qui amortit le mouvement d'ouverture. Cet amortisseur prend appui sur une traverse s'étendant d'un bout à l'autre de l'ouverture et il doit être particulièrement bien positionné pour que sa tige soit rétractée quand la coupole passe de la position demi-ouverte à la position complètement rabattue. En outre lorsque la coupole est déverrouillée, l'amortisseur ne participe pas à son ouverture, mais constitue plutôt un frein au déploiement. L'emploi d'un tel cylindre amortisseur rend donc le réglage du mécanisme d'ouverture plus délicat, indépendamment du fait qu'il est coûteux, plus difficile à monter et d'une longévité et fiabilité de fonctionnement incertaines.We also know from DE-A-3143318, a dome operating mechanism which also uses a pivoting link and a jack, but which also introduces a damping cylinder attached to the end of the link, which acts as a stop and which dampens the opening movement. This shock absorber rests on a cross member extending from one end to the other of the opening and it must be particularly well positioned so that its rod is retracted when the dome passes from the half-open position to the fully folded position . In addition, when the dome is unlocked, the damper does not participate in its opening, but rather constitutes a brake on deployment. The use of such a damping cylinder therefore makes the adjustment of the opening mechanism more delicate, regardless of the fact that it is expensive, more difficult to assemble and of uncertain longevity and operating reliability.

Cela a conduit la Demanderesse à mettre en oeuvre un mécanisme de manoeuvre beaucoup plus simple dans lequel la fonction d'amortissement du pivotement est assurée par un ressort monté d'une façon particulière qui présente l'avantage de coopérer aussi au premier temps d'ouverture de la coupole, ressort dont le fonctionnement et les forces qu'il engendre sont parfaitement connus et constant dans le temps.This has led the Applicant to implement a much simpler operating mechanism in which the function of damping the pivoting is ensured by a spring mounted in a particular way which has the advantage of also cooperating during the first opening time. of the dome, spring whose functioning and the forces it generates are perfectly known and constant over time.

Ainsi le mécanisme de manoeuvre est extrêmement simple et il trouve aisément sa place sur une face latérale du caisson ou de la costière de la coupole, et il réagit immédiatement et en souplesse à la commande d'ouverture du dispositif de sécurité en autorisant la refermeture à l'aide d'un système à treuil traditionnel.Thus the operating mechanism is extremely simple and it easily finds its place on a lateral face of the box or the curb of the dome, and it reacts immediately and flexibly to the command to open the security device by authorizing the reclosing to using a traditional winch system.

Aussi un objet de la présente invention consiste t-il en un mécanisme de manoeuvre de la coupole d'un exutoire de fumée articulé sur une arête d'une costière délimitant l'ouverture de l'exutoire utilisant un vérin participant à l'ouverture de ladite coupole en appui sur une biellette pivotante permettant d'augmenter la portée du vérin, et utilisant un organe amortisseur du mouvement de pivotement de ladite biellette de mécanisme selon lequel l'organe amortisseur est un ressort qui est accroché d'un côté à l'extrémité de la biellette pivotante et de l'autre à un point fixe, et qui est monté de telle façon qu'en position d'équilibre non bandé il maintient la biellette sensiblement alignée avec lui et selon lequel la pointe de la tige rétractable du vérin prend appui sur l'extrémité de ladite biellette à proximité du point d'accrochage du ressort.An object of the present invention therefore consists of a mechanism for operating the dome of a smoke outlet articulated on a ridge of a curb delimiting the opening of the outlet using a participating jack. at the opening of said dome bearing on a pivoting rod making it possible to increase the range of the jack, and using a damper member for the pivoting movement of said mechanism linker according to which the damper member is a spring which is hung from one side at the end of the swivel link and the other at a fixed point, and which is mounted in such a way that in the non-banded equilibrium position it keeps the link substantially aligned with it and according to which the point of the retractable rod of the jack bears on the end of said link near the point of attachment of the spring.

Selon une caractéristique particulière de l'invention, en position fermée de la coupole le ressort est tendu entre le point fixe et l'extrémité de la biellette infléchie vers le bas, et exerce une force de poussée sur la tige du vérin; de plus à la position d'équilibre non bandé du ressort correspond une position d'ouverture à 90° de la coupole pour laquelle le vérin est détendu, et en position ouverte et rabattue de la coupole, le ressort est tendu entre le point fixe et l'extrémité de la biellette infléchie vers le haut, et exerce une force de retenue sur la tige du vérin.According to a particular characteristic of the invention, in the closed position of the dome, the spring is stretched between the fixed point and the end of the rod bent downwards, and exerts a pushing force on the rod of the jack; moreover, in the non-banded equilibrium position of the spring corresponds an opening position at 90 ° to the dome for which the jack is relaxed, and in the open and folded position of the dome, the spring is tensioned between the fixed point and the end of the rod bent upwards, and exerts a retaining force on the cylinder rod.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante d'une forme de réalisation prise à titre d'exemple non limitatif dans laquelle il est fait référence aux dessins annexés qui représentent:

  • figure 1 une vue en perspective d'une coupole munie du mécanisme de manoeuvre;
  • figure 2 une vue de côté à plus grande échelle de ce mécanisme;
  • figures 3 à 5 des vues de côté du mécansime dans la position de fermeture, d'ouverture à 90° et d'ouverture complète de la coupole.
Other characteristics and advantages of the invention will appear on reading the following description of an embodiment taken by way of nonlimiting example in which reference is made to the appended drawings which represent:
  • Figure 1 a perspective view of a dome provided with the operating mechanism;
  • Figure 2 a side view on a larger scale of this mechanism;
  • Figures 3 to 5 side views of the mechanism in the closed position, 90 ° opening and full opening of the dome.

On a représenté sur les figures 1 et 2 un exutoire de fumées dont la coupole 1 est articulée par des charnières 2 sur une arête d'une costière 3 rapportée sur le toit d'un local et qui délimite une ouverture 4. La coupole en position fermeture est verrouillée sur la costière 3 par un loquet à fusible 15, destiné à libérer l'ouverture de la coupole en cas d'élévation anormale de température au niveau de l'ouverture 4.There is shown in Figures 1 and 2 a smoke outlet whose dome 1 is articulated by hinges 2 on an edge of a curb 3 reported on the roof of a room and which defines an opening 4. The dome in position closure is locked on the curb 3 by a fuse latch 15, intended to release the opening of the dome in the event of an abnormal rise in temperature at the opening 4.

Le montant de la coupole, du côté opposé aux charnières 2 dispose en outre d'une prise 16 pour l'accrochage d'un câble de refermeture selon une disposition connue en soi. Une platine 5 montée sur une face interne de la costière perpendiculaire à l'axe des charnières 2 sert de support au mécanisme de manoeuvre de la coupole dont un élément important est un vérin classique 6 à CO₂. L'extrémité du corps du vérin 6 est articulée sur un montant latéral de la coupole selon un axe 7 disposé sensiblement au milieu de ce montant.The amount of the dome, on the side opposite the hinges 2 also has a socket 16 for hooking a reclosing cable according to an arrangement known per se. A plate 5 mounted on an internal face of the curb perpendicular to the axis of the hinges 2 serves to support the mechanism for operating the dome, an important element of which is a conventional cylinder 6 with CO₂. The end of the body of the jack 6 is articulated on a lateral upright of the dome along an axis 7 disposed substantially in the middle of this upright.

Du côté opposé la pointe de la tige 8 du vérin 6 s'articule sur une extrémité 9 d'une biellette 10 dont une autre extrémité pivote autour d'un axe horizontal 11, logé dans un étrier 12, ledit étrier étant monté sur un côté de la platine 5.On the opposite side, the tip of the rod 8 of the jack 6 is articulated on one end 9 of a link 10 of which another end pivots about a horizontal axis 11, housed in a stirrup 12, said stirrup being mounted on one side of deck 5.

En bout de la biellette 10 est accroché un ressort 13 dont l'extrémité opposée est ancrée à un crochet fixe 14 solidaire de la platine. L'ensemble du mécanisme de manoeuvre ainsi constitué du vérin 6, de la biellette 10 et du ressort 13, est monté de telle façon que le ressort non bandé est sensiblement en alignement avec la biellette 10 entre l'étrier 12 et le crochet 14 comme le montre la figure 2.At the end of the link 10 is hung a spring 13, the opposite end of which is anchored to a fixed hook 14 secured to the plate. The assembly of the operating mechanism thus constituted by the jack 6, the link 10 and the spring 13, is mounted in such a way that the non-banded spring is substantially in alignment with the link 10 between the stirrup 12 and the hook 14 as shown in Figure 2.

Le ressort 13 constitue un composant essentiel du mécanisme. En effet dans la position de fermeture de la coupole illustrée à la figure 3, le vérin 6 occupe une position faiblement inclinée où il se place le long d'une paroi interne latérale de la costière 3. La tige 8 du vérin est alors rentrée à force à l'intérieur du corps du vérin en prenant appui sur l'extrémité 9 de la biellette 10. La force d'appui de la tige de vérin provoque ainsi l'inflexion vers le bas de la biellette 10, inflexion contrariée par la force du ressort 13. Dans la position fermée de la coupole, le ressort et la biellette ne sont plus alignés et forment une ligne brisée, comme représentés. Le ressort 13 est bandé et exerce un effort permanent sur la tige 8 du vérin. Cette action est sans effet du fait que la coupole est verrouillée sur la costière 3 par le loquet à fusible 15. Le ressort 13 confère au mécanisme une élasticité qui permet un verrouillage correct de la coupole sans réglage précis. Le verrouillage fonctionnera malgré les différences constructives des vérins utilisés (force de compression ― course de la tige 8), le ressort 13 pouvant compenser par un allongement plus ou moins grand les petites variations inhérente à chaque montage.The spring 13 constitutes an essential component of the mechanism. In fact, in the closed position of the dome illustrated in FIG. 3, the jack 6 occupies a position slightly inclined where it is placed along a lateral internal wall of the curb 3. The rod 8 of the jack is then forced back inside the body of the jack by bearing on the end 9 of the rod 10. The pressing force of the actuator rod thus causes the downward inflection of the rod 10, inflection thwarted by the force of the spring 13. In the closed position of the dome, the spring and the rod are no longer aligned and form a broken line, as shown. The spring 13 is bandaged and exerts a permanent force on the rod 8 of the jack. This action has no effect because the dome is locked on the curb 3 by the fuse latch 15. The spring 13 gives the mechanism an elasticity which allows correct locking of the dome without precise adjustment. The locking will function despite the constructive differences of the jacks used (compression force - stroke of the rod 8), the spring 13 being able to compensate by a more or less large elongation for the small variations inherent in each assembly.

Quand le loquet à fusible 15 libère le verrouillage de la coupole, le ressort 13, par l'effort qu'il exerce sur la tige 8 du vérin tendant à faire remonter le point d'appui 9, lance le mouvement d'ouverture de la coupole puis le vérin 6 prend le relais en se détendant ce qui a pour effet d'amener la coupole 1 en position sensiblement verticale comme l'illustre la figure 4. A ce moment là, le vérin est détendu; le ressort et la biellette ont atteint une position voisine du point d'équilibre, le ressort n'étant plus bandé du fait de la pression minime exercée par la tige 8 sur l'extrémité de la biellette 10.When the fuse latch 15 releases the locking of the dome, the spring 13, by the force which it exerts on the rod 8 of the jack tending to raise the fulcrum 9, launches the opening movement of the dome then the jack 6 takes over by expanding which has the effect of bringing the dome 1 into a substantially vertical position as illustrated in FIG. 4. At this time, the jack is relaxed; the spring and the link have reached a position close to the point of equilibrium, the spring no longer being bandaged due to the minimal pressure exerted by the rod 8 on the end of the link 10.

On a fait en sorte par construction que la coupole 1 ait légèrement dépassée la position verticale à 90° par rapport au toit, quand le vérin est détendu. Cela veut dire qu'à partir de ce moment là, la coupole poursuit son mouvement de basculement sous l'effet de son propre poids. Le ressort et la biellette s'infléchissent vers le haut, le ressort se tendant et jouant cette fois le rôle d'organe de retenue du vérin et de la coupole qui peut ainsi atteindre une ouverture de l'ordre de 140°, bien suffisante pour répondre aux exigences de sécurité et de contrôle propres à ces exutoires. On notera que, lors de cette phase ultime d'ouverture illustrée à la figure 5, le ressort 13 amortit et ralentit le mouvement d'ouverture avant l'immobilisation de la coupole. Il n'y a donc, grâce au ressort, aucun à coup dans ce mouvement dont la phase d'ouverture depuis le déverrouillage jusqu'à l'arrivée est progressivement accélérée puis progressivement ralentie. De plus le ressort 13 limite la course de pivotement de la biellette 10 et par conséquent de la coupole. A défaut de ressort, la coupole ne serait pas retenue et tomberait sur le toit sauf à lui adjoindre un autre système de maintien. Si à la place du ressort on utilisait une tringle rigide, la coupole sertait arrêtée brutalement dans son mouvement et serait détériorée. Un avantage de ce système de retenue à ressort réside aussi dans le fait que la coupole s'immobilise à environ 140° ce qui permet d'assurer sa refermeture à l'aide d'un treuil et d'un câble de tirage venant s'accrocher sur la prise 16.It has been arranged by construction that the dome 1 has slightly exceeded the vertical position at 90 ° relative to the roof, when the jack is relaxed. This means that from this moment, the dome continues its tilting movement under the effect of its own weight. The spring and the rod bend upward, the spring tensing and this time playing the role of organ retaining cylinder and dome which can thus reach an opening of about 140 °, sufficient to meet the security and control requirements specific to these outlets. It will be noted that, during this final opening phase illustrated in FIG. 5, the spring 13 dampens and slows down the opening movement before immobilization of the dome. There is therefore, thanks to the spring, no sudden in this movement whose opening phase from unlocking to arrival is gradually accelerated and then gradually slowed down. In addition, the spring 13 limits the pivoting stroke of the rod 10 and therefore of the dome. In the absence of a spring, the dome would not be retained and would fall on the roof unless another support system was added to it. If in place of the spring a rigid rod was used, the dome would serve as an abrupt stop in its movement and would be damaged. An advantage of this spring retaining system also lies in the fact that the dome comes to a standstill at around 140 ° which allows it to be closed using a winch and a pulling cable coming from hang on socket 16.

Le mécanisme se prête ainsi aisément aux essais d'ouverture de la coupole et à la vérification de son bon fonctionnement.The mechanism thus easily lends itself to testing the opening of the dome and to verifying its correct operation.

Une plaque d'habillage, non représentée, formant un carter est rapportée au dessus de la platine 5 dont elle cache le mécanisme. Avantageusement cette plaque est profilée en vue d'améliorer le coefficient aéraulique de l'exutoire.A covering plate, not shown, forming a casing is attached above the plate 5 from which it hides the mechanism. Advantageously, this plate is profiled in order to improve the ventilation coefficient of the outlet.

L'invention a été décrite sur la base d'un exemple particulier de réalisation, auquel elle ne se limite pas, mais en englobe au contraire toutes les variantes constructives sans sortir du cadre de l'invention telle qu'elle est revendiquée.The invention has been described on the basis of a particular embodiment, to which it is not limited, but on the contrary encompasses all the constructive variants thereof without departing from the scope of the invention as claimed.

Claims (7)

1. Actuation mechanism for a fume extraction hood articulated on the top of a collar surrounding the hood opening, using a lifter effecting the opening of the said hood bearing on a pivoting strut allowing the reach of the lifter to be increased and using a damping element for the pivoting movement of the said strut characterised in that the damping unit is a spring (13) which is hooked on one side to the end of the pivoting strut (10) and the other side to a fixed point (14) and which is mounted in such a way that in a non-stretched equilibrium position, it maintains the strut substantially aligned with itself and in that the end of the retractable rod (8) of the lifter (6) bears on the end (9) of the said strut near the attachment point of the spring.
2. Mechanism according to claim 1, characterised in that a plate (5) mounted on an internal face of the collar (3) serves to support the elements of the actuation mechanism and for a fixing hook (14) for the spring (13).
3. Mechanism according to claim 1, characterised in that the end of the body of the lifter (6) is articulated on a side vertical of the hood (1) about an axis (7) located substantially in the middle of this upright.
4. Mechanism according to claims 1 and 2, characterised in that the strut (10) pivots at one of its ends about a horizontal axle (11) located in a stirrup (12) mounted on one side of the plate (5).
5. Mechanism according to claim 1, characterised in that in the closed position of the hood (1), the spring (13) is extended between the fixed point (14) and the end (9) of the strut (10) directed downwardly and exerts a compression force on the rod (8) of the lifter.
6. Mechanism according to claim 1, characterised in that the non-stretched equilibrium position of the spring (13) corresponds to an opening position of 90° of the hood at which the lifter (6, 8) is extended.
7. Mechanism according to claim 1, characterised in that in the open and folded back position of the hood (1), the spring (13) is extended between the fixed point (14) and the end (9) of the strut directed upwardly and exerts a retaining force on the rod (8) of the lifter.
EP88401015A 1987-05-05 1988-04-26 Actuation machanism for a fume extraction hood Expired - Lifetime EP0291376B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706292 1987-05-05
FR8706292A FR2614916B1 (en) 1987-05-05 1987-05-05 MANEUVERING MECHANISM OF THE SMOKE OUTLET CUP

Publications (2)

Publication Number Publication Date
EP0291376A1 EP0291376A1 (en) 1988-11-17
EP0291376B1 true EP0291376B1 (en) 1991-09-25

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ID=9350768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401015A Expired - Lifetime EP0291376B1 (en) 1987-05-05 1988-04-26 Actuation machanism for a fume extraction hood

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EP (1) EP0291376B1 (en)
DE (1) DE3865081D1 (en)
FR (1) FR2614916B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671820B1 (en) * 1991-01-17 1997-07-04 Axter LANTERN WITH AN IMPROVED OPENING MECHANISM.
DE4303767C1 (en) * 1993-02-09 1994-04-07 Kreft & Gett Jet Kunststoff Hinging hatch opening and shutting drive - has variable length actuator and swing arm coupled together without tools and folding between it and frame when uncoupled
CN112493912A (en) * 2020-11-25 2021-03-16 齐齐哈尔大学 Old man helps frame like lavatory

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827003A (en) * 1954-01-20 1958-03-18 Wasco Products Combination skylight and fire vent construction
US3659515A (en) * 1970-09-08 1972-05-02 Ford Motor Co Apparatus for delivering moving air
DE2411641C2 (en) * 1974-03-12 1982-08-12 Flachglas AG, 8510 Fürth Opening device for a roof vent that is hinged to the structure and can be opened upwards
FR2331654A2 (en) * 1975-03-11 1977-06-10 Musitelli Automatically opening fire hazard skylight - has three link mechanism with spring/damper and lock with fusible link
DE3143318A1 (en) * 1981-10-31 1983-05-19 Josef 4815 Schloss Holte Fortmeier Smoke and heat outlet device
FR2545869B2 (en) * 1982-11-26 1989-08-18 Renaud Thierry OPENING MECHANISM OF A SMOKE OUTLET
FR2539177B1 (en) * 1983-01-07 1987-01-30 Sigma Plastique DEVICE FOR THE FULL OPENING OF LAMPS OR SAFETY OUTLETS IN THE EVENT OF FIRE
FR2542360B1 (en) * 1983-03-11 1987-10-09 Alcaud Sa MOBILE HATCH DEVICE, PARTICULARLY FOR SMOKING

Also Published As

Publication number Publication date
FR2614916A1 (en) 1988-11-10
EP0291376A1 (en) 1988-11-17
DE3865081D1 (en) 1991-10-31
FR2614916B1 (en) 1992-08-14

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