EP1844210B1 - Device for braking the rotation of a drive shaft of the leaf of a high-speed door - Google Patents
Device for braking the rotation of a drive shaft of the leaf of a high-speed door Download PDFInfo
- Publication number
- EP1844210B1 EP1844210B1 EP06709229.6A EP06709229A EP1844210B1 EP 1844210 B1 EP1844210 B1 EP 1844210B1 EP 06709229 A EP06709229 A EP 06709229A EP 1844210 B1 EP1844210 B1 EP 1844210B1
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- EP
- European Patent Office
- Prior art keywords
- weight
- cavity
- shaft
- rotation
- braking device
- 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.)
- Not-in-force
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- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 claims 1
- 230000000717 retained effect Effects 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
- E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
- E06B9/84—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against dropping
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y2201/21—Brakes
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y2201/23—Actuation thereof
- E05Y2201/232—Actuation thereof by automatically acting means
- E05Y2201/242—Actuation thereof by automatically acting means using threshold speed
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y2201/252—Type of friction
- E05Y2201/26—Mechanical friction
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y2201/262—Type of motion, e.g. braking
- E05Y2201/266—Type of motion, e.g. braking rotary
Definitions
- the present invention relates to a tree braking device of a flexible or rigid and articulated apron of a rapid industrial, commercial, domestic or garage door.
- a fast door having a flexible apron that winds or folds at the lintel of the door.
- This type of door has the advantage of being able to open and close very quickly with a speed greater than 0.5 m / s.
- Such a door is particularly suitable for equipping a bay through which a large traffic flows.
- the door is equipped with a drive kinematic chain that can rotate a shaft on which can roll the deck directly or on which can wrap the straps that allow the folding of the deck.
- the kinematic chain generally comprises an electric motor which, via a gearbox, drives the shaft in rotation.
- the elements of the drive train are dimensioned to undergo a very large number of cycles. Nevertheless, one can deplore a mechanical break in the gearbox, a breakage of a coupling between the shaft and the gearbox, etc ...
- the tree is no longer controlled; he is then completely free in rotation. Under the effect of gravity, the deck can then fall suddenly since the tree to which the deck is bound is no longer able to control the fall of the latter.
- An object of the invention is to provide a braking device for a fast door flexible apron securing the operation thereof especially in case of a mechanical failure of its kinematic drive chain.
- the subject of the invention is essentially a braking device according to the wording of claim 1.
- the idea underlying the invention is to detect an increase in the speed of rotation of the shaft beyond a predetermined threshold.
- the increase in the speed of rotation of the shaft occurs in case of breakage of an element of the driving kinematic chain, so that the shaft is completely free to rotate and is driven by the weight of the apron. If the shaft is driven in overspeed, it induces a displacement of the weights that actuate braking means.
- a specificity of flexible deck doors lies in the fact that they have a high normal operating speed.
- the breaking of the kinematic drive chain induces an overspeed which is however not significantly greater than the normal operating speed. In other words, the speed differential of the shaft between its normal operation and abnormal operation is not considerable.
- each cavity is equipped with means for defining two operating modes of the weights, namely a normal operating regime in which the weight is maintained in an area comprising the proximal end of the cavity and an abnormal operating regime in which the movement of the weight is favored to operate the braking means.
- the centrifugal force that applies to the weight causes it to pass the protruding zone to reach the distal portion of the cavity.
- This distal portion which has a less acute angle than the proximal portion, offers little restraint to the weight which can then actuate the braking means.
- each cavity has, on its wall on which the counterweight bears in operating condition, a rib which separates the distal end from the proximal end, the rib on which the counterweight is operating. normal of the door. The presence of this rib is then combined with the characteristic that the proximal and distal portions have radially increasing angles.
- ruptible means hold the flyweight at the proximal portion of the cavity, these ruptible means are likely to break in abnormal operation of the door releasing the weight to the proximal portion of the cavity.
- the ruptible means consist of a wire whose resistance makes it possible to collect the centrifugal force applied to the flyweight operating at normal speed of the shaft but does not allow to collect the centrifugal force applied to the flyweight. in abnormal operation.
- the braking means comprise a movable assembly radially or axially on which the flyweights act, and a fixed assembly on which the movable assembly can come into contact by friction and / or meshing to slow the rotation of the shaft.
- each cavity receiving a flyweight has at its distal end a radially movable finger that can occupy a retracted position in which the finger is held by a spring or can occupy an extended position under the effect of a push by a weight, the finger in the extended position can engage in a light formed in a fixed disc.
- This embodiment has the advantage of involving only a small number of moving parts.
- each cavity receiving a flyweight is delimited by the wall formed in the flange by a wall of an axially movable assembly between a normal speed operating position in which the moving assembly is pushed towards the cavity by elastic means and an operating position at a speed exceeding a predetermined threshold in which each feeder axially pushes the moving assembly against a fixed disk.
- the displacement of the flyweights is converted into an axial movement of a moving assembly which carries out the locking of the device cooperating with a fixed disk.
- the braking can then be achieved through the characteristic that the movable assembly has, on a wall opposite its wall facing the cavity, at least one tooth capable of meshing with a tooth protruding from the fixed disk.
- the teeth of the movable assembly and the teeth of the fixed disk are against undercut and disengaged after their meshing only by a reverse rotation of the shaft.
- Blocking can also be achieved thanks to the characteristic that the axially movable assembly has on its wall opposite to its wall facing each cavity, a convergent frustoconical ring on which at least one pivoting lever rests, having a hook to its free end, the lever being pivotable between an operating position at normal speed of the shaft and a position of running at a speed of the shaft exceeding a predetermined threshold in which the ring presses each lever to rotate it to pick a fixed bar.
- the axially movable assembly has on its wall opposite its wall facing the cavity a seal that can frictionally brake the rotation against a fixed element.
- the device comprises a linear ball bearing for sliding the movable assembly relative to the axis.
- the device may comprise means of connection with a control unit making it possible to postpone triggering of the device.
- a rapid door intended to close a bay in a partition has two uprights 2 which are generally each connected at their upper end by a transverse cover 3.
- One of the uprights 2 supports drive means of a shaft 4 which are inside the transverse cover 3.
- the drive means generally comprise an electric motor 5 and a gear 6 which provide the link with the drive. tree 4.
- an apron is suspended from the shaft 4; the apron winds on the shaft 4 to clear the passage and unrolls the shaft 4 to close the passage.
- Another way of moving the deck is to hang the deck on the uprights 2 and provide straps one end of which is connected to the shaft 4 and whose other end is connected to the threshold of the deck. During the rotation of the shaft 4, the straps are wound on the shaft and thus raise the apron that folds below the transverse cover.
- the specificity of the door according to the invention lies in the fact that a braking device 8 is disposed at the end of the shaft.
- the braking device 8 has an axis 9 which, at its free end, has a hexagonal section; it can be engaged in a housing of the same section made in the shaft 4 of the door.
- the device has an axially movable assembly 11 which is rotated with the axis 9.
- This mobile assembly 11 comprises a sleeve 10 which is engaged on the axis 9 and is secured thereto by a key 15. Axially, the sleeve 10 is stopped by an elastic ring.
- the sleeve 10 receives a support sleeve 12 on which is fixed a disc 13.
- This disc 13 is equipped with several radial teeth 14 whose function will appear later. Note however that the teeth 14 have a profile against undercut.
- a point that is important to note is that a linear ball bearing 16 is interposed between the sleeve 10 and the intermediate sleeve 12.
- the movable assembly 11 is rotated by the axis 9 and is capable of axial displacement thanks to the ball bearing 16 linear.
- the axial displacement of the moving assembly 11 is limited by a spring 21 disposed axially with the axis 9.
- a flange 17 engaged on the axis 9 makes it possible to enclose several flyweights 18 - in the example represented the flyweights 18 are six in number - which bear against the disc 13 of the moving assembly 11. As can be seen see FIGS, each weight 18 is enclosed in a cavity 19.
- the cavity 19 is, in the embodiment shown, defined by a wall of the movable assembly 11 and a wall 20 formed in the flange 17. This wall is very characteristic since as can be seen it has two successive parts, namely a proximal portion which is close to the axis of rotation of the axis 9 and a distal portion 20b which moves away from this axis .
- the flange 17 is integral in rotation with the axis 9 by the key 15.
- the specificity of the wall 20 is that the proximal portion 20a forms a first angle with the axis of rotation and the distal portion 20b forms a second angle with the axis of rotation, this second angle being greater than the first.
- a projecting zone 22 separates the distal portion from the proximal portion.
- the device also has a fixed assembly which, in the example shown, is a disc which has four teeth having a profile against undercut.
- the operation of the braking device is therefore as follows.
- Figure 2 shows the device at rest, the flyweight 18 then rests at the proximal end of the cavity 19.
- the weight 18 is then supported on the distal portion of the cavity. This has a relatively obtuse angle, the flyweight 18 reaches the distal end of the cavity 19 and pushes the movable assembly towards the fixed disk.
- Figures 6 to 9 show an alternative embodiment of the device which also has an axially movable assembly 25 under the action of the flyweights 18.
- the main difference to the mobile assembly described above is that the moving assembly 25 has, on its wall opposite its wall in view of the cavity 19, a frustoconical ring 26.
- the means, permitting the axial displacement of the moving assembly 25 are similar to those allowing the displacement of the moving assembly 11 and the flange 17 with its cavities 19 enclosing weights 18 is similar to that of the device of the Figures 2 to 5 .
- levers 27 are embarked on the braking device. These levers 27 are eccentric with respect to the axis of rotation and can pivot relative to respective axes 28, parallel to the axis of rotation of the device. Each lever 27 has, at its free end, a hook 30.
- Figure 6 shows the device at rest; the weight 18 then rests against the proximal end of the cavity.
- Figure 7 shows the device in normal operating mode; the weight 18 is then in abutment against the projection zone 22 of the cavity and against the wall of the moving assembly 25.
- Figure 8 shows the device at the beginning of abnormal operating regime, that is to say in case of overspeed of the door shaft; the flyweight 18 pushed by the centrifugal force, exceeds the projecting zone 22 and then pushes the movable assembly 25 in an axial direction.
- the figure 9 then illustrates the displacement of the movable element.
- This displacement has the effect of producing a rotation of the levers 27 because the frustoconical ring acts as a ramp on which the levers 27 rest.
- each lever 27 comes, thanks to its hook 28, to pick a fixed bar 29, which interrupts the rotation of the device and thus of the shaft 4.
- the device then interrupts the rotation of the shaft 4.
- the device of Figures 10 to 14 differs from the two previous embodiments in that a movable assembly 31 moves radially.
- each cavity 19 like the cavities of the two previous embodiments has a proximal portion 20a and a distal portion 20b, separated by a projecting zone 22, the distal portion forming an angle more open with the axis of rotation than the proximal part.
- braking means these are constituted by a movable element 31 radially engageable with a fixed element.
- the movable element 31 has a radially movable pin 32 capable of occupying a retracted position 31 in which the finger 32 is held by a spring 33 in an extended position in the event of compression of the spring 33.
- the fixed element is, in the example shown, a fixed ring 35 in which are formed radial apertures 36.
- Figure 11 shows the device at rest, the weight 18 is then against the proximal end of the cavity.
- Figure 12 shows the device in normal operating mode; the weight 18 is in abutment against the projecting zone 22 of the cavity.
- Figure 13 shows the device at the beginning of abnormal operating regime, that is to say, in the event of overspeed of the shaft 4 of the door, the flyweight protrudes beyond the projecting zone 22 and comes to rest on the finger 32.
- Figure 14 illustrates the thrust exerted by the weight 8 on the finger 32 which radially out the latter.
- the finger 32 then engages in a light of the ring, which has the effect of blocking the rotation of the device and therefore the shaft.
- the cavity 19 may include an elastic means such as a flexible elastic blade that maintains the weight in the proximal portion of the cavity, when the door operates in normal mode.
- the invention thus provides a braking device which, in its various embodiments, makes it possible effectively to stop the rotation of a shaft of a door when the drive chain breaks. of it.
- the invention especially provides a braking device adaptable to soft curtain doors whose rotation speed of the shaft in normal operation and abnormal operation is close enough.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Braking Arrangements (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Description
La présente invention concerne un dispositif de freinage d'arbre d'un tablier souple ou rigide et articulé d'une porte rapide industrielle, commerciale, domestique ou de garage.The present invention relates to a tree braking device of a flexible or rigid and articulated apron of a rapid industrial, commercial, domestic or garage door.
Pour fermer une ouverture pratiquée dans une cloison séparant deux espaces, on peut utiliser une porte rapide ayant un tablier souple qui s'enroule ou se replie au niveau du linteau de la porte. Ce type de portes présente l'avantage de pouvoir s'ouvrir et se fermer très rapidement avec une vitesse supérieure à 0,5m/s. Une telle porte est donc particulièrement adaptée pour équiper une baie au travers de laquelle circule un traffic important.To close an opening made in a partition separating two spaces, it is possible to use a fast door having a flexible apron that winds or folds at the lintel of the door. This type of door has the advantage of being able to open and close very quickly with a speed greater than 0.5 m / s. Such a door is particularly suitable for equipping a bay through which a large traffic flows.
Pour déplacer le tablier, la porte est équipée d'une chaîne cinématique d'entraînement qui permet de mettre en rotation un arbre sur lequel peut s'enrouler directement le tablier ou sur lequel peuvent s'enrouler des sangles qui permettent le repliement du tablier.To move the deck, the door is equipped with a drive kinematic chain that can rotate a shaft on which can roll the deck directly or on which can wrap the straps that allow the folding of the deck.
La chaîne cinématique comprend généralement un moteur électrique qui, par l'intermédiaire d'un réducteur, entraîne l'arbre en rotation.The kinematic chain generally comprises an electric motor which, via a gearbox, drives the shaft in rotation.
Bien entendu, les éléments de la chaîne cinématique sont dimensionnés pour subir un très grand nombre de cycles. Néanmoins, on peut déplorer une rupture mécanique dans le réducteur, une rupture d'un accouplement entre l'arbre et le réducteur, etc...Of course, the elements of the drive train are dimensioned to undergo a very large number of cycles. Nevertheless, one can deplore a mechanical break in the gearbox, a breakage of a coupling between the shaft and the gearbox, etc ...
Dans un tel cas de figure, l'arbre n'est plus commandé ; il est alors totalement libre en rotation. Sous l'effet de la gravité, le tablier peut alors tomber brutalement puisque l'arbre auquel le tablier est lié n'est plus en mesure de contrôler la chute de ce dernier.In such a case, the tree is no longer controlled; he is then completely free in rotation. Under the effect of gravity, the deck can then fall suddenly since the tree to which the deck is bound is no longer able to control the fall of the latter.
Il existe alors un risque d'accident si, simultanément à la chute du tablier, une personne traverse la porte et se trouve sur la trajectoire du tablier.There is a risk of accident if, simultaneously with the fall of the deck, a person through the door and is in the path of the deck.
Le document
Un but de l'invention est de proposer une dispositif de freinage pour une porte rapide à tablier souple sécurisant le fonctionnement de celle-ci notamment en cas d'une rupture mécanique de sa chaine cinématique d'entraînement.An object of the invention is to provide a braking device for a fast door flexible apron securing the operation thereof especially in case of a mechanical failure of its kinematic drive chain.
L'invention a essentiellement pour objet un dispositif de freinage selon le libellé de la revendication 1.The subject of the invention is essentially a braking device according to the wording of claim 1.
L'idée à la base de l'invention est de détecter une augmentation de la vitesse de rotation de l'arbre au-delà d'un seuil prédéterminé. En pratique, l'augmentation de la vitesse de rotation de l'arbre se produit en cas de rupture d'un élément de la chaîne cinématique d'entraînement, ce qui fait que l'arbre se trouve totalement libre en rotation et est entraîné par le poids du tablier. Si l'arbre est entraîné en survitesse, cela induit un déplacement des masselottes qui actionnent des moyens de freinage.The idea underlying the invention is to detect an increase in the speed of rotation of the shaft beyond a predetermined threshold. In practice, the increase in the speed of rotation of the shaft occurs in case of breakage of an element of the driving kinematic chain, so that the shaft is completely free to rotate and is driven by the weight of the apron. If the shaft is driven in overspeed, it induces a displacement of the weights that actuate braking means.
Une spécificité des portes à tablier souple réside dans le fait qu'elles présentent une vitesse de fonctionnement normale élevée. La rupture de la chaîne d'entraînement cinématique induit une survitesse qui n'est toutefois pas significativement supérieure à la vitesse de fonctionnement normal. En d'autres termes, le différentiel de vitesse de l'arbre entre son fonctionnement normal et un fonctionnement anormal n'est pas considérable. C'est pour cela que chaque cavité est équipée de moyens permettant de définir deux régimes de fonctionnement des masselottes, à savoir un régime de fonctionnement normal dans lequel la masselotte est maintenue dans une zone comprenant l'extrémité proximale de la cavité et un régime de fonctionnement anormal dans lequel le déplacement de la masselotte est favorisé pour actionner les moyens de freinage.A specificity of flexible deck doors lies in the fact that they have a high normal operating speed. The breaking of the kinematic drive chain induces an overspeed which is however not significantly greater than the normal operating speed. In other words, the speed differential of the shaft between its normal operation and abnormal operation is not considerable. This is why each cavity is equipped with means for defining two operating modes of the weights, namely a normal operating regime in which the weight is maintained in an area comprising the proximal end of the cavity and an abnormal operating regime in which the movement of the weight is favored to operate the braking means.
En cas de survitesse de l'arbre et, donc, du dispositif de freinage, la force centrifuge qui s'applique à la masselotte fait que celle-ci passe la zone en saillie pour atteindre la partie distale de la cavité. Cette partie distale, qui présente un angle moins aigu que la partie proximale, offre peu de retenue à la masselotte qui peut alors actionner les moyens de freinage.In case of overspeed of the shaft and, therefore, the braking device, the centrifugal force that applies to the weight causes it to pass the protruding zone to reach the distal portion of the cavity. This distal portion, which has a less acute angle than the proximal portion, offers little restraint to the weight which can then actuate the braking means.
Dans une autre forme de réalisation, chaque cavité présente, sur sa paroi sur laquelle la masselotte est en appui en condition de fonctionnement, une nervure qui sépare l'extrémité distale de l'extrémité proximale, nervure sur laquelle s'appuie la masselotte en fonctionnement normal de la porte. La présence de cette nervure est alors combinée avec la caractéristique selon laquelle les parties proximale et distale présentent des angles qui vont en s'accentuant radialement.In another embodiment, each cavity has, on its wall on which the counterweight bears in operating condition, a rib which separates the distal end from the proximal end, the rib on which the counterweight is operating. normal of the door. The presence of this rib is then combined with the characteristic that the proximal and distal portions have radially increasing angles.
Dans une autre forme de réalisation, des moyens ruptibles retiennent la masselotte à la partie proximale de la cavité, ces moyens ruptibles sont susceptibles de se casser en fonctionnement anormal de la porte libérant la masselotte vers la partie proximale de la cavité.In another embodiment, ruptible means hold the flyweight at the proximal portion of the cavity, these ruptible means are likely to break in abnormal operation of the door releasing the weight to the proximal portion of the cavity.
On peut envisager que les moyens ruptibles sont constitués d'un fil dont la résistance permet d'encaisser la force centrifuge appliquée sur la masselotte en fonctionnement à vitesse normal de l'arbre mais ne permet pas d'encaisser la force centrifuge appliquée sur la masselotte en fonctionnement anormal.It can be envisaged that the ruptible means consist of a wire whose resistance makes it possible to collect the centrifugal force applied to the flyweight operating at normal speed of the shaft but does not allow to collect the centrifugal force applied to the flyweight. in abnormal operation.
Selon une possibilité, les moyens de freinage comprennent un ensemble mobile radialement ou axialement sur lequel agissent les masselottes, et un ensemble fixe sur lequel l'ensemble mobile peut entrer en contact par friction et/ou engrènement pour freiner la rotation de l'arbre.According to one possibility, the braking means comprise a movable assembly radially or axially on which the flyweights act, and a fixed assembly on which the movable assembly can come into contact by friction and / or meshing to slow the rotation of the shaft.
Dans une forme de réalisation, chaque cavité recevant une masselotte présente à son extrémité distale un doigt radialement mobile pouvant occuper une position rétractée dans laquelle le doigt est maintenu par un ressort ou pouvant occuper une position sortie sous l'effet d'une poussée par une masselotte, le doigt en position sortie pouvant s'engager dans une lumière ménagée dans un disque fixe. Cette forme de réalisation a comme avantage de n'impliquer qu'un nombre réduit de pièces en mouvement.In one embodiment, each cavity receiving a flyweight has at its distal end a radially movable finger that can occupy a retracted position in which the finger is held by a spring or can occupy an extended position under the effect of a push by a weight, the finger in the extended position can engage in a light formed in a fixed disc. This embodiment has the advantage of involving only a small number of moving parts.
Dans une autre forme de réalisation, chaque cavité recevant une masselotte est délimitée par la paroi ménagée dans le flasque par une paroi d'un ensemble axialement mobile entre une position de fonctionnement à vitesse normale dans laquelle l'ensemble mobile est poussé en direction de la cavité par des moyens élastiques et une position de fonctionnement à vitesse dépassant un seuil prédéterminé dans laquelle chaque masselotte pousse axialement l'ensemble mobile contre un disque fixe. Dans cette forme de réalisation, le déplacement des masselottes est converti en un mouvement axial d'un ensemble mobile qui réalise le blocage du dispositif en coopérant avec un disque fixe.In another embodiment, each cavity receiving a flyweight is delimited by the wall formed in the flange by a wall of an axially movable assembly between a normal speed operating position in which the moving assembly is pushed towards the cavity by elastic means and an operating position at a speed exceeding a predetermined threshold in which each feeder axially pushes the moving assembly against a fixed disk. In this embodiment, the displacement of the flyweights is converted into an axial movement of a moving assembly which carries out the locking of the device cooperating with a fixed disk.
Le freinage peut être alors réalisé grâce à la caractéristique selon laquelle l'ensemble mobile présente, sur une paroi opposée à sa paroi tournée vers la cavité, au moins une dent susceptible de s'engrener dans une dent dépassant du disque fixe.The braking can then be achieved through the characteristic that the movable assembly has, on a wall opposite its wall facing the cavity, at least one tooth capable of meshing with a tooth protruding from the fixed disk.
De préférence, les dents de l'ensemble mobile et les dents du disque fixe sont en contre dépouille et ne se dégagent après leur engrènement que par une rotation inverse de l'arbre. Ainsi, il est nécessaire qu'il y ait intervention humaine pour débloquer la rotation de l'arbre.Preferably, the teeth of the movable assembly and the teeth of the fixed disk are against undercut and disengaged after their meshing only by a reverse rotation of the shaft. Thus, it is necessary that there is human intervention to unlock the rotation of the tree.
Le blocage peut également être réalisé grâce à la caractéristique selon laquelle l'ensemble mobile axialement présente sur sa paroi opposée à sa paroi en regard de chaque cavité, un anneau tronconique convergent sur laquelle s'appuie au moins un levier pivotant, présentant un crochet à son extrémité libre, le levier pouvant pivoter entre une position de fonctionnement a vitesse normale de l'arbre et une position de fonctionnement à vitesse de l'arbre dépassant un seuil prédétermine dans laquelle l'anneau appuie sur chaque levier pour le faire pivoter jusqu'à crocheter une barre fixe.Blocking can also be achieved thanks to the characteristic that the axially movable assembly has on its wall opposite to its wall facing each cavity, a convergent frustoconical ring on which at least one pivoting lever rests, having a hook to its free end, the lever being pivotable between an operating position at normal speed of the shaft and a position of running at a speed of the shaft exceeding a predetermined threshold in which the ring presses each lever to rotate it to pick a fixed bar.
On peut, par ailleurs, envisager de prévoir un ralentissement de la rotation du dispositif avant son freinage complet. A cet effet, l'ensemble mobile axialement présente sur sa paroi opposée à sa paroi en regard de la cavité une garniture pouvant freiner par friction la rotation contre un élément fixe.One can, moreover, consider to provide a slowing of the rotation of the device before its complete braking. For this purpose, the axially movable assembly has on its wall opposite its wall facing the cavity a seal that can frictionally brake the rotation against a fixed element.
Pour assurer son mouvement axial par rapport à son axe, le dispositif comprend un roulement à billes linéaire permettant de faire coulisser l'ensemble mobile par rapport à l'axe.To ensure its axial movement relative to its axis, the device comprises a linear ball bearing for sliding the movable assembly relative to the axis.
On note également que le dispositif peut comprendre des moyens de liaisons avec une unité de contrôle permettant de reporter un déclenchement du dispositif.It should also be noted that the device may comprise means of connection with a control unit making it possible to postpone triggering of the device.
Pour sa bonne compréhension, l'invention est décrite en référence au dessin ci annexé représentant, à titre d'exemple non limitatif plusieurs forme de réalisation d'un dispositif de freinage selon celle-ci selon celle-ci.
-
Figure 1 représente, de façon schématique, une porte équipée d'un dispositif de freinage agissant sur un arbre lorsque la vitesse de rotation de l'arbre dépasse sa vitesse normale de fonctionnement, -
Figures 2 à 5 représentent en perspective avec une coupe partielle une forme de réalisation du dispositif de freinage dans plusieurs configurations de fonctionnement de celui-ci, -
Figures 6 à 9 représentent en perspective avec une coupe partielle une autre forme de réalisation du dispositif de freinage dans plusieurs configurations de fonctionnement de celui-ci, -
Figure 10 représente à une echelle agrandie un détail du dispositif de freinage représenté auxFigures 6 à 9 , -
Figure 11 à 14 représentent en perspective avec une coupe partielle une autre forme de réalisation du dispositif de freinage dans plusieurs configurations de fonctionnement de celui-ci,
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Figure 1 schematically represents a door equipped with a braking device acting on a shaft when the speed of rotation of the shaft exceeds its normal operating speed, -
Figures 2 to 5 show in perspective with partial section an embodiment of the braking device in several operating configurations thereof, -
Figures 6 to 9 show in perspective with a partial section another embodiment of the braking device in several operating configurations thereof, -
Figure 10 represents on an enlarged scale a detail of the braking device shown inFigures 6 to 9 , -
Figure 11 to 14 show in perspective with a partial section another embodiment of the braking device in several operating configurations thereof,
Par simplification, les éléments qui se retrouvent dans ces différentes formes de réalisation, ou qui sont similaires d'une forme de réalisation à une autre, sont désignés par les mêmes références numériques.For simplicity, the elements found in these different embodiments, or which are similar from one embodiment to another, are designated by the same reference numerals.
De façon classique, une porte rapide destinée à fermer une baie dans une cloison présente deux montants 2 qui sont généralement reliés chacun à leur extrémité supérieure par un capot transversal 3.Conventionally, a rapid door intended to close a bay in a partition has two
L'un des montants 2 supporte des moyens d'entraînement d'un arbre 4 qui se trouvent à l'intérieur du capot transversal 3. Les moyens d'entraînement comprennent généralement un moteur électrique 5 et un réducteur 6 qui assurent la liaison avec l'arbre 4.One of the
Dans l'exemple représenté de la porte, un tablier est suspendu à l'arbre 4 ; le tablier s'enroule sur l'arbre 4 pour dégager le passage et se déroule de l'arbre 4 pour fermer le passage.In the illustrated example of the door, an apron is suspended from the shaft 4; the apron winds on the shaft 4 to clear the passage and unrolls the shaft 4 to close the passage.
Un autre mode de déplacement du tablier consiste à suspendre le tablier sur les montants 2 et à prévoir des sangles dont une extrémité est reliée à l'arbre 4 et dont l'autre extrémité est reliée au seuil du tablier. Lors de la rotation de l'arbre 4, les sangles s'enroulent sur l'arbre et relèvent ainsi le tablier qui se replie au-dessous du capot transversal.Another way of moving the deck is to hang the deck on the
La spécificité de la porte selon l'invention réside dans le fait qu'un dispositif de freinage 8 est disposé en bout de l'arbre.The specificity of the door according to the invention lies in the fact that a
On se reportera tout d'abord au
Le dispositif présente un ensemble mobile axialement 11 qui est entrainé en rotation avec l'axe 9.The device has an axially
Cet ensemble mobile 11 comprend un manchon 10 qui est engagé sur l'axe 9 et est solidaire de celui-ci par une clavette 15. Axialement, le manchon 10 est arrêté par un anneau élastique.This
Le manchon 10 reçoit un manchon support 12 sur lequel est fixé un disque 13. Ce disque 13 est équipé de plusieurs dents radiales 14 dont la fonction apparaîtra plus loin. On note néanmoins que les dents 14 ont un profil en contre dépouille.The
Un point qu'il est important de remarquer est qu'un roulement à billes 16 linéaire est interposé entre le manchon 10 et le manchon intermédiaire 12.A point that is important to note is that a
Ainsi, l'ensemble mobile 11 est entraîné en rotation par l'axe 9 et est susceptible d'avoir un déplacement axial grâce au roulement à billes 16 linéaire. Le déplacement axial de l'ensemble mobile 11 est limité par un ressort 21 disposé co axialement avec l'axe 9.Thus, the
Un flasque 17 engagé sur l'axe 9 permet d'enfermer plusieurs masselottes 18 - dans l'exemple représenté les masselottes 18 sont au nombre de six - qui sont en appui contre le disque 13 de l'ensemble mobile 11. Comme on peut le voir sur les figures, chaque masselotte 18 est enfermée dans une cavité 19. La cavité 19 est, dans l'exemple de réalisation représenté, délimitée par une paroi de l'ensemble mobile 11 et par une paroi 20 ménagée dans le flasque 17. Cette paroi est très caractéristique puisque comme on peut le voir elle présente deux parties successives, à savoir une partie proximale qui se trouve à proximité de l'axe de rotation de l'axe 9 et une partie distale 20b qui s'éloigne de ce même axe. Le flasque 17 est solidaire en rotation de l'axe 9 par la clavette 15.A
La spécificité de la paroi 20 est que la partie proximale 20a forme un premier angle avec l'axe de rotation et la partie distale 20b forme un second angle avec l'axe de rotation, ce second angle étant supérieur au premier.The specificity of the
On note également qu'une zone en saillie 22 sépare la partie distale de la partie proximale.It is also noted that a projecting
Le dispositif présente également un ensemble fixe qui, dans l'exemple représenté, est un disque qui possède quatre dents présentant un profil en contre dépouille.The device also has a fixed assembly which, in the example shown, is a disc which has four teeth having a profile against undercut.
Le fonctionnement du dispositif de freinage est donc le suivant.The operation of the braking device is therefore as follows.
Lorsque la porte est en action et, donc, que l'arbre 4 tourne pour assurer la montée ou la descente du rideau, la masselotte 18 est soumise à une force centrifuge qui l'éloigne donc de l'axe de rotation et la met en appui contre la zone en saillie 22 de la paroi 20 de la cavité 19. Cet état de fonctionnement normal de la porte est illustré par la
En revanche, si la vitesse de rotation s'accroît au-delà d'un seuil prédéterminé, la force centrifuge qui s'accroît à cause de la vitesse pousse la masselotte 18 au-delà de la zone en saillie 22 de la cavité 19. La
La masselotte 18 est alors en appui sur la partie distale de la cavité. Celle-ci présente un angle relativement obtus, la masselotte 18 rejoint l'extrémité distale de la cavité 19 et pousse l'ensemble mobile vers le disque fixe.The
Comme le montre alors la
Les moyens, permettant le déplacement axial de l'ensemble mobile 25 sont similaires à ceux permettant le déplacement de l'ensemble mobile 11 et le flasque 17 avec ses cavités 19 renfermant des masselottes 18 est similaire à celui du dispositif des
On voit également que des leviers 27 sont embarqués sur le dispositif de freinage. Ces leviers 27 sont excentrés par rapport à l'axe de rotation et peuvent pivoter par rapport à des axes respectifs 28, parallèles à l'axe de rotation du dispositif. Chaque levier 27 présente, à son extrémité libre, un crochet 30.It can also be seen that levers 27 are embarked on the braking device. These
On note également que plusieurs barres fixes 29, au nombre de six dans l'exemple illustré, sont placées autour du dispositif de freinage.It is also noted that several fixed
Le fonctionnement du dispositif dans cette forme de réalisation est le suivant.The operation of the device in this embodiment is as follows.
La
Le dispositif des
On trouve dans cette forme de réalisation un flasque 1 7 dans lequel sont aménagées plusieurs cavités 19 renfermant des masselottes. Chaque cavité 19, à l'instar des cavités des deux formes de réalisation précédentes présente une partie proximale 20a et une partie distale 20b, séparées par une zone en saillie 22, la partie distale formant un angle plus ouvert avec l'axe de rotation que la partie proximale.In this embodiment there is a flange 1 7 in which are arranged
En ce qui concerne les moyens de freinage, ceux-ci sont constitués par un élément mobile 31 radialement pouvant coopérer avec un élément fixe.As regards the braking means, these are constituted by a
L'élément mobile 31 présente un doigt 32 mobile radialement pouvant occuper une position rétractée 31 dans laquelle le doigt 32 est maintenu par un ressort 33 dans une position sortie en cas de compression du ressort 33.The
L'élément fixe est, dans l'exemple représenté, une couronne 35 fixe dans laquelle sont ménagées des lumières 36 radiales.The fixed element is, in the example shown, a fixed
Il est à noter que la cavité 19 peut inclure un moyen élastique tel qu'une lamelle élastique souple qui maintient la masselotte dans la partie proximale de la cavité, lorsque la porte fonctionne en régime normal.It should be noted that the
L'invention fournit donc un dispositif de freinage qui, dans ses différentes formes de réalisation, permet d'assurer efficacement l'arrêt de la rotation d'un arbre d'une porte, lorsqu'il y a rupture de la chaîne d'entraînement de celle-ci.The invention thus provides a braking device which, in its various embodiments, makes it possible effectively to stop the rotation of a shaft of a door when the drive chain breaks. of it.
L'invention fournit spécialement un dispositif de freinage adaptable aux portes à rideau souple dont la vitesse de rotation de l'arbre en fonctionnement normal et en fonctionnement anormal soit assez proche.The invention especially provides a braking device adaptable to soft curtain doors whose rotation speed of the shaft in normal operation and abnormal operation is close enough.
Bien entendu, l'invention n'est pas limitée aux formes de réalisation décrites ci-dessus à titre d'exemple non limitatif, mais elle en embrasse au contraire toutes les formes de réalisation.Of course, the invention is not limited to the embodiments described above by way of non-limiting example, but it encompasses all the embodiments.
Claims (13)
- A device for braking the rotation of a shaft (4) for raising and lowering a flexible or rigid and articulated leaf (6) of a high-speed, industrial, commercial, domestic or garage door, said device comprising an endplate (17) rotated by the shaft (4), said endplate (17) having several cavities (19) each of which comprises a wall (20), which, serving as the support for a weight (18) in operating condition, is inclined relative to the axis of rotation of the endplate at an angle less than 90°, each cavity having a proximal end situated close to the axis of rotation of the endplate and a distal end at a distance from the axis of rotation of the endplate, each weight (18) traveling in one of said cavities between a position of operation at normal speed of the shaft (4) in which the weight is in a zone comprising the proximal end of the cavity (19) and a position of operation at a speed of the shaft (4) exceeding a predetermined threshold in which the weight (18) is in a zone comprising the distal end of the cavity and actuates means for braking the rotation of the shaft (4), said device being characterized in that each cavity (19) has means ensuring a stabilization of the position of the weight (18) in the zone comprising the proximal end of the cavity in operation at normal speed of the shaft and promoting a movement of the weight (18) toward the zone comprising the distal end of the cavity when the speed of rotation of the shaft (4) exceeds a predetermined threshold, each cavity (19) having, on its wall on which the weight presses, in operating condition, a first portion situated on the side of the proximal end having a relatively acute angle α relative to the axis of rotation of the device and a second portion situated on the side of the distal end having an angle β relative to the axis of rotation, the angle β being greater than the angle α and the junction between the first and the second portion forming a protruding zone (22) upon which the weight (18) presses in operation at normal speed.
- The braking device as claimed in claim 1, characterized in that each cavity (19) has, on its wall on which the weight (18) presses in operating condition, a rib which separates the distal end from the proximal end, a rib on which the weight (18) presses in normal operation of the door.
- The braking device as claimed in one of claims 1 or 2, characterized in that breakable means keep the weight (18) at the proximal end of the cavity, these breakable means capable of breaking in abnormal operation of the door releasing the weight toward the proximal end of the cavity.
- The braking device as claimed in claim 3, characterized in that the breakable means consist of a wire whose strength makes it possible to sustain the centrifugal force applied to the weight (18) in operation at normal speed of the shaft but does not make it possible to sustain the centrifugal force applied to the weight in abnormal operation.
- The braking device as claimed in one of claims 1 to 4, characterized in that the braking means comprise a radially or axially movable assembly (11, 25, 31) on which the weights (18) act and a fixed assembly (23, 29, 35) with which the movable assembly may come into contact by friction and/or meshing to brake the rotation of the shaft.
- The braking device as claimed in claim 5, characterized in that each cavity (19) receiving a weight (18) has, at its distal end, a radially movable finger (32) that can occupy a retracted position in which the finger is retained by a spring (33) or can occupy a protruding position under the effect of a pressure by a weight (18), the finger (32) in the protruding position being able to engage in an opening (36) arranged in a fixed ring (35).
- The braking device as claimed in claim 5, characterized in that each cavity (19) receiving a weight (18) is delimited by the wall (20) of an assembly (11, 25) that can move axially between a position of operation at normal speed in which the movable assembly is pushed in the direction of the cavity by elastic means and a position of operation at a speed exceeding a predetermined threshold in which each weight axially pushes the movable assembly against a fixed element (23, 29).
- The braking device as claimed in claim 7, characterized in that the movable assembly (11) has, on a wall opposite to its wall facing the cavity (19), at least one tooth (14) capable of engaging in a tooth (24) protruding from a fixed disk (23).
- The braking device as claimed in claim 8, characterized in that the teeth (14, 24) of the movable assembly and the teeth of the fixed disk are undercut and are disengaged after their engagement only by a reverse rotation of the shaft.
- The device as claimed in claim 5, characterized in that the axially movable assembly (25) has, on its wall opposite to its wall facing each cavity, a convergent frustoconical ring (26) on which at least one pivoting lever (27) presses having a hook (30) at its free end, the lever (27) being able to pivot between a position of operation at normal speed of the shaft and a position of operation at a speed of the shaft exceeding a predetermined threshold in which the frustoconical ring presses on each lever (27) in order to cause it to pivot until it catches on a fixed bar (29).
- The braking device as claimed in one of claims 7 to 10, characterized in that the axially movable assembly (11, 25) has, on its wall opposite to its wall facing the cavity, a pad for braking the rotation by friction against a fixed element.
- The braking device as claimed in one of claims 7 to 11, characterized in that it comprises a linear ball bearing (16) making it possible to cause the movable assembly (11, 25) to slide relative to the spindle.
- The braking device as claimed in one of claims 1 to 12, characterized in that it comprises means of connection with a control unit making it possible to transfer a triggering of the device.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0501036A FR2881464A1 (en) | 2005-02-02 | 2005-02-02 | Rapid door for bay, has electric motor for driving shaft, in rotation, connected to flexible apron, and screw-locking device for stopping rotation of shaft when its rotating speed exceeds rotating speed of normal operation of door |
FR0501628A FR2881465B1 (en) | 2005-02-02 | 2005-02-17 | DEVICE FOR BRAKING THE ROTATION OF A DRIVE SHAFT OF A HIGH-SPEED DOOR APRON |
PCT/FR2006/000237 WO2006082319A1 (en) | 2005-02-02 | 2006-02-02 | Device for braking the rotation of a drive shaft of the leaf of a high-speed door |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1844210A1 EP1844210A1 (en) | 2007-10-17 |
EP1844210B1 true EP1844210B1 (en) | 2015-01-07 |
Family
ID=36373278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06709229.6A Not-in-force EP1844210B1 (en) | 2005-02-02 | 2006-02-02 | Device for braking the rotation of a drive shaft of the leaf of a high-speed door |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080134582A1 (en) |
EP (1) | EP1844210B1 (en) |
WO (1) | WO2006082319A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8136297B2 (en) | 2007-09-28 | 2012-03-20 | Babcock & Wilcox Technical Services Y-12, Llc | Speed control system for an access gate |
TWI494500B (en) * | 2013-10-14 | 2015-08-01 | Unidirectional centrifugal mechanism of door machine | |
KR101509548B1 (en) | 2013-12-13 | 2015-04-07 | 한국철도기술연구원 | Noise and vibration reduction device for brake discs |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US961680A (en) * | 1909-10-07 | 1910-06-14 | Harry Cole | Shade-roller attachment. |
US1093930A (en) * | 1912-07-01 | 1914-04-21 | Stewart Hartshorn Co | Spear for spring shade-rollers. |
US2614629A (en) * | 1950-06-27 | 1952-10-21 | Joanna Western Mills Co | Shade roller |
FR2086822A5 (en) * | 1970-04-10 | 1971-12-31 | Sipa Ind Plastic | |
US4009745A (en) * | 1975-05-02 | 1977-03-01 | Breneman, Inc. | Window shade support roller and method of assembling |
JPS5520815A (en) * | 1978-07-31 | 1980-02-14 | Metako Kigyo Kk | Rolled screen |
GB2034834B (en) * | 1978-10-17 | 1982-11-10 | Powell R E | Disc brake assemblies |
CA2393866A1 (en) * | 2002-07-17 | 2004-01-17 | Normand Savard | Integrated bracket ratchet system |
-
2006
- 2006-02-02 EP EP06709229.6A patent/EP1844210B1/en not_active Not-in-force
- 2006-02-02 WO PCT/FR2006/000237 patent/WO2006082319A1/en active Application Filing
- 2006-02-02 US US11/815,399 patent/US20080134582A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
WO2006082319A1 (en) | 2006-08-10 |
US20080134582A1 (en) | 2008-06-12 |
EP1844210A1 (en) | 2007-10-17 |
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