EP0308356A1 - Operating device for roller shutters - Google Patents

Operating device for roller shutters Download PDF

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Publication number
EP0308356A1
EP0308356A1 EP88440075A EP88440075A EP0308356A1 EP 0308356 A1 EP0308356 A1 EP 0308356A1 EP 88440075 A EP88440075 A EP 88440075A EP 88440075 A EP88440075 A EP 88440075A EP 0308356 A1 EP0308356 A1 EP 0308356A1
Authority
EP
European Patent Office
Prior art keywords
drive device
shaft
shoes
brake drum
cooperating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88440075A
Other languages
German (de)
French (fr)
Inventor
René Muller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bubendorff SA
Original Assignee
Bubendorff SA
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Filing date
Publication date
Application filed by Bubendorff SA filed Critical Bubendorff SA
Publication of EP0308356A1 publication Critical patent/EP0308356A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • E06B9/76—Operating devices or mechanisms, e.g. with electric drive using crank handles
    • 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
    • E06B9/90—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions

Definitions

  • the invention relates to a drive device, in particular for a rolling shutter, comprising a housing serving as a housing for an endless screw driven in rotation by control means such as a crank, rod or the like, and cooperating with a toothed wheel mounted either at the end of a drive shaft corresponding to said roller shutter, or on a section of shaft capable of being connected to this drive shaft.
  • the present invention will find its application in the mechanical industry in general and, more particularly, in the field of removable covers such as roller shutter or the like.
  • roller shutters for door, window and the like, on the one hand to filter the light entering a dwelling and, on the other hand, to properly close the latter and prevent a shark from entering it.
  • the roller shutters usually used consist of an apron composed of several juxtaposed blades and winding or unwinding from a drum housed in a box generally disposed at the upper end of the opening, for example a window, that should be closed.
  • control means such as chain, crank strap, rod or the like, actuating a drive device cooperating with the shaft on which the shutter winding drum is mounted. rolling.
  • the drive device can be limited to a simple pulley mounted on the shutter drive shaft. rolling and around which is wound either partially or globally the aforementioned chain or strap.
  • Such drive devices have a certain number of drawbacks which make, in certain cases, the operation of the roller shutter particularly delicate, in fact, whatever the direction of rotation applied to the drive shaft via of the chain or strap, the user is obliged to constantly compensate for the weight of the apron. This is done by applying a certain force to the chain or to the strap so as to avoid an uncontrolled unwinding of this deck and its sudden fallout on the low end-of-travel stop. Therefore, the slightest inattention on the part of the user can result in deterioration of the roller shutter.
  • a drive device comprising a housing serving as a housing for an endless screw driven in rotation by control means, for example a crank, a rod or the like.
  • This worm cooperates with a toothed wheel mounted at one end of the roller shutter drive shaft.
  • this toothed wheel can be mounted on a section of shaft maintained in the casing of the drive device and connected to said drive shaft of the roller shutter.
  • the braking and, in particular the locking of the apron in position partially unwound are obtained due to an appropriate cutting of the worm and the toothed wheel.
  • the latter mesh with a coefficient of friction sufficient to ensure either braking or blocking of the drive shaft of the shutter.
  • a drive device has been produced, substantially identical to that mentioned above, further comprising a braking device acting on the worm.
  • a braking device acting on the worm In the context of its use, it has been found that such a carbnge device causes a jerky drive of the deck. This is mainly due to a non-constant action of the user on the control means, for example on the crank or on the rod.
  • the object of the present invention is to remedy all of the aforementioned drawbacks by proposing a drive device making it possible to easily control the deployment or the folding of the apron of a roller shutter and to considerably facilitate the locking or unlocking of said apron by partially unrolled position.
  • the invention solves the problem of creating a drive device, in particular for a rolling shutter, comprising a housing serving as a housing for an endless screw driven in rotation by control means. , such as a crank, rod or other, and cooperating with a toothed wheel mounted either at the end of a drive shaft corresponding to said roller shutter, or on a section shaft, adapted to be connected to this drive shaft, this drive device comprising braking means cooperating with the shaft or the shaft section on which the toothed wheel is mounted.
  • the drive device comprises means for releasing these braking means actuated by the control means driving the worm.
  • Another advantage of the present invention consists in that the action of the braking means is partially annihilated during the deployment or folding of the apron, which avoids the user to compensate, by means of the means control, the friction exerted by said braking means.
  • the drive device 1 comprises a casing 2 of parallelepiped shape, one of the side walls 3 of which constitutes a removable cover 4 closing said casing 2.
  • an endless worm 5 is housed on either side by shaft sections 6, 7 of substantially smaller diameter and kept in free rotation at their ends 8, 9 by side walls 10, 11 of the casing 2.
  • the worm 5 is able to be rotated by control means (not shown), for example a crank, a rod or the like, actuated by the user.
  • the transmission of this rotary movement of the worm 5 is passed on to a toothed wheel 12 meshing thereon and mounted on a shaft 13 which may correspond, for example, to the end of a drive shaft a rolling shutter.
  • this shaft 13 on which this toothed wheel 12 is mounted may be dependent on the drive device 1 and have its ends 14, 15 engaged in bearings 16 and 17 integral with the side walls 3 of the casing 2. Under these conditions, the 'shaft 13 is extended by a tip 18 which is projecting from said housing 2 and for ensuring the connection to a drive shaft of a roller shutter or the like.
  • this drive device 1 comprises braking means 19 which are able to cooperate with the shaft 13 on which the toothed wheel is mounted 12.
  • these braking means 19 consist of a drum brake 20 fixedly mounted on the shaft 13 and shoes 21, 22 arranged in the lower part 23 of the casing 2 and cooperating with said brake drum 20.
  • the shoes 21 and 22 rest, in a sliding manner, on the bottom 24 of the casing 2 and are located on either side of the vertical median plane 25 of the drive device 1.
  • elastic elements 26 cooperating with the side walls 10, 11 of said casing 2, push the shoes 21, 22 against the periphery 27 of the brake drum 20.
  • the elastic elements 26 are housed in blind holes 48 machined in the side walls 49 of the shoes 21, 22, these elastic elements 26 coming to bear, simultaneously, against the bottom of the blind holes 48 and against the side walls 10, 11 of the casing 2.
  • the brake drum 20 has a configuration substantially identical to a pulley and has on its periphery 27 a groove 28 whose side walls 29 are flared outward.
  • this groove 28 engages a flange 30 integral with each of the shoes 21, 22 and borrowing a curvilinear shape, adjusted to the diameter of the brake drum 20.
  • this flange 30 has a substantially triangular section so that its lateral sides 31, 32 easily cooperate with the lateral walls 29 of the groove 28.
  • the drive device 1 also includes means 33 for unlocking these braking means 19 actuated by means of the control means.
  • these unlocking means 33 consist, in fact, of means making it possible to push back the shoe 21 or 22 which tends to engage under the brake drum 20 due, on the one hand, to friction and, on the other hand part, the direction of rotation of the latter.
  • these unlocking means 33 consist, on the one hand, of means 34 ensuring an axial play in the worm 5.
  • the ends 8, 9 of the shaft sections 6 , 7 extending on either side of said worm screw 5 are slidably engaged in orifices 35 machined in the side walls 10, 11 of the casing 2.
  • these unlocking means 33 consist of cooperation between the shoes 21, 22 and the worm 5.
  • said shoes 21, 22 are extended in their upper part 36 by a body 37 provided with a bore 38 serving as a passage for the shaft sections 6, 7 of the worm screw 5.
  • a body 37 provided with a bore 38 serving as a passage for the shaft sections 6, 7 of the worm screw 5.
  • it has been cited higher than the latter has a diameter substantially greater than the shaft sections 6, 7. This makes it possible to obtain shoulders 39, 40 at the ends of the worm 5, at the connection of said shaft sections 6, 7.
  • thrust ball bearings 41 consists essentially in considerably reducing the friction between the body 37 of the shoes 21, 22 and the worm screw 5 during the rotation of the latter.
  • said worm 5 exerts a tangential force on the toothed wheel 12 driving the latter for example in the direction of rotation of the arrow 43, as visible in FIG. 3.
  • the toothed wheel 12 exerts a negative reaction on the worm 5 causing the sliding axial of the latter in the direction of the arrow noted 44 in Figure 3.
  • the worm 5 and in particular the ball bearing 41 push the shoe 22 which would tend to engage under the drum brake 20 due to the direction of rotation of the latter indicated by arrow 43.
  • the advantages obtained thanks to the present invention essentially consist in that the operation of the drive device, for example of a roller shutter curtain, is done in a particularly easy manner. Indeed, the simple action of the user on the control means causes the braking means to be released and ensures maximum efficiency for said drive device.
  • the deck In contrast, each time the action on said control means is interrupted, the deck generates, by its own weight, the locking of the drive device. This allows, on the one hand, to avoid the sudden fallout of said apron and, on the other hand, to block this apron in any semi-deployed position.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

A drive device (1), particularly for a roller shutter, comprises a casing (2) acting as a housing for an endless screw (5) driven in rotation by control means, such as a crank, rod or the like, and interacting with a toothed wheel (12), mounted either at the end of a drive shaft corresponding to the said roller shutter, or on a shaft section (13) capable of being connected to this drive shaft. In order to avoid uncontrolled unrolling of the apron part of the said roller shutter or to facilitate its locking in a partially deployed position, this operating device (1) is equipped with braking means (19) interacting with the shaft or the shaft section (13) on which the toothed wheel (12) is mounted. <IMAGE>

Description

L'invention concerne un dispositif d'entraînement, notamment pour volet roulant, comprenant un carter servant de logement à une vis sans fin entraînée en rotation par des moyens de commande tels que manivelle, tringle ou autre, et coopérant avec une roue dentée montée soit à l'extrémité d'un arbre d'entraînement correspondant audit volet roulant, soit sur un tronçon d'arbre apte à être connecté à cet arbre d'entrainement.The invention relates to a drive device, in particular for a rolling shutter, comprising a housing serving as a housing for an endless screw driven in rotation by control means such as a crank, rod or the like, and cooperating with a toothed wheel mounted either at the end of a drive shaft corresponding to said roller shutter, or on a section of shaft capable of being connected to this drive shaft.

La présente invention trouvera son application dans l'industrie mécanique en général et, plus particulièrement, dans le domaine des couvertures amovibles telles que volet roulant ou autre.The present invention will find its application in the mechanical industry in general and, more particularly, in the field of removable covers such as roller shutter or the like.

Il est fréquent d'utiliser des volets roulants pour porte, fenêtre et analogue, d'une part pour filtrer la lumière pénétrant dans une habitation et, d'autre part, pour clore convenablement cette dernière et empêcher à un aigrefin d'y pénétrer.It is common to use roller shutters for door, window and the like, on the one hand to filter the light entering a dwelling and, on the other hand, to properly close the latter and prevent a shark from entering it.

Ainsi, les volets roulants habituellement utilisés sont constitués d'un tablier composé de plusieurs lames juxtaposées et s'enroulant ou se déroulant d'un tambour logé dans un caisson généralement disposé à l'extrémité supérieure de l'ouverture, par exemple une fenêtre, qu'il convient de clore. Habituellement, le déploiement ou le repliement du tablier est commandé par des moyens de commande, tels que chaîne, sangle manivelle, tringle ou autre, actionnant un dispositif d'entraînement coopérant avec l'arbre sur lequel est monté le tambour d'enroulement du volet roulant.Thus, the roller shutters usually used consist of an apron composed of several juxtaposed blades and winding or unwinding from a drum housed in a box generally disposed at the upper end of the opening, for example a window, that should be closed. Usually, the deployment or folding of the deck is controlled by control means, such as chain, crank strap, rod or the like, actuating a drive device cooperating with the shaft on which the shutter winding drum is mounted. rolling.

Dans le cadre de moyens de commande, tels que chaîne ou sangle, le dispositif d'entraînement peut se limiter à une simple poulie montée sur l'arbre d'entraînement du volet roulant et autour de laquelle s'enroule soit partiellement, soit globalement la chaîne ou la sangle précitée.In the context of control means, such as chain or strap, the drive device can be limited to a simple pulley mounted on the shutter drive shaft. rolling and around which is wound either partially or globally the aforementioned chain or strap.

De tels dispositifs d'entraînement présentent un certain nombre d'inconvénients qui rendent, dans certains cas, la manoeuvre du volet roulant particulièrement délicate, en effet, quel que soit le sens de rotation appliqué à l'arbre d'entraînement par l'intermédiaire de la chaîne ou de la sangle, l'usager est dans l'obligation de compenser constamment le poids du tablier. Ceci s'effectue en appliquant un certain effort sur la chaîne ou sur la sangle de manière à éviter un déroulement incontrôlé de ce tablier et sa retombée brutale sur la butée de fin de course basse. De ce fait, la moindre inattention de la part de l'usager peut avoir comme conséquence la détérioration du volet roulant.Such drive devices have a certain number of drawbacks which make, in certain cases, the operation of the roller shutter particularly delicate, in fact, whatever the direction of rotation applied to the drive shaft via of the chain or strap, the user is obliged to constantly compensate for the weight of the apron. This is done by applying a certain force to the chain or to the strap so as to avoid an uncontrolled unwinding of this deck and its sudden fallout on the low end-of-travel stop. Therefore, the slightest inattention on the part of the user can result in deterioration of the roller shutter.

De plus, pour maintenir le tablier en position partiellement déroulée, il est nécessaire de bloquer soit la sangle, soit la chaîne et immobiliser par là même le dispositif d'entraînement du volet roulant. Fréquemment, soit le blocage, soit le déblocage de cette chaîne ou de la sangle est difficile à exécuter et oblige l'usager à s'y reprendre à plusieurs reprises.In addition, to maintain the apron in the partially unrolled position, it is necessary to block either the strap or the chain and thereby immobilize the rolling shutter drive device. Frequently, either blocking or unblocking this chain or the strap is difficult to perform and obliges the user to repeat it several times.

A cet effet, on a conçu un dispositif d'entraînement comprenant un carter servant de logement à une vis sans fin entraînée en rotation par des moyens de commande, par exemple une manivelle, une tringle ou autre. Cette vis sans fin coopère avec une roue dentée montée à une extrémité de l'arbre d'entraînement du volet roulant. Dans certains cas, cette roue dentée peut être montée sur un tronçon d'arbre maintenu dans le carter du dispositif d'entraînement et connecté audit arbre d'entraînement du volet roulant.To this end, a drive device has been designed comprising a housing serving as a housing for an endless screw driven in rotation by control means, for example a crank, a rod or the like. This worm cooperates with a toothed wheel mounted at one end of the roller shutter drive shaft. In certain cases, this toothed wheel can be mounted on a section of shaft maintained in the casing of the drive device and connected to said drive shaft of the roller shutter.

Dans le cadre de ce dispositif d'entraînement connu, le freinage et, notamment le blocage du tablier en position partiellement déroulée, sont obtenus en raison d'un taillage approprié de la vis sans fin et de la roue dentée. Ainsi, ces dernières s'engrènent avec un coefficient de frottement suffisant pour assurer soit le freinage, soit le blocage de l'arbre d'entraînement du volet roulant.In the context of this known drive device, the braking and, in particular the locking of the apron in position partially unwound, are obtained due to an appropriate cutting of the worm and the toothed wheel. Thus, the latter mesh with a coefficient of friction sufficient to ensure either braking or blocking of the drive shaft of the shutter.

Il est bien évident qu'un tel dispositif d'entraînement présente un rendement particulièrement faible et demande à l'usager des efforts supplémentaires pour obtenir le repliement du tablier de ce volet roulant.It is obvious that such a drive device has a particularly low efficiency and requires the user to make additional efforts to obtain the folding of the deck of this roller shutter.

Pour remédier à cet inconvénient, il a été réalisé un dispositif d'entraînement, sensiblement identique à celui cité ci-dessus, comportant, en outre, un dispositif de freinage agissant sur la vis sans fin. Dans le cadre de son utilisation, il s'est avéré qu'un tel dispositif de freinge provoque un entraînement par saccade du tablier. Ceci est dû essentiellement à une action non constante de l'usager sur les moyens de commande, par exemple sur la manivelle ou sur la tringle.To remedy this drawback, a drive device has been produced, substantially identical to that mentioned above, further comprising a braking device acting on the worm. In the context of its use, it has been found that such a freinge device causes a jerky drive of the deck. This is mainly due to a non-constant action of the user on the control means, for example on the crank or on the rod.

La présente invention a pour but de remédier à l'ensemble des inconvénients précités en proposant un dispositif d'entraînement permettant de contrôler aisément le déploiement ou le repliement du tablier d'un volet roulant et de faciliter considérablement le blocage ou le déblocage dudit tablier en position partiellement déroulée.The object of the present invention is to remedy all of the aforementioned drawbacks by proposing a drive device making it possible to easily control the deployment or the folding of the apron of a roller shutter and to considerably facilitate the locking or unlocking of said apron by partially unrolled position.

L'invention, telle qu'elle est caractérisée dans les revendications, résout le problème consistant à créer un dispositif d'entraînement, notamment pour volet roulant, comprenant un carter servant de logement à une vis sans fin entraînée en rotation par des moyens de commande, tels que manivelle, tringle ou autre, et coopérant avec une roue dentée montée soit à l'extrémité d'un arbre d'entraînement correspondant audit volet roulant, soit sur un tronçon d'arbre, apte à être connecté à cet arbre d'entraînement, ce dispositif d'entraînement comportant des moyens de freinage coopérant avec l'arbre ou le tronçon d'arbre sur lequel est montée la roue dentée.The invention, as characterized in the claims, solves the problem of creating a drive device, in particular for a rolling shutter, comprising a housing serving as a housing for an endless screw driven in rotation by control means. , such as a crank, rod or other, and cooperating with a toothed wheel mounted either at the end of a drive shaft corresponding to said roller shutter, or on a section shaft, adapted to be connected to this drive shaft, this drive device comprising braking means cooperating with the shaft or the shaft section on which the toothed wheel is mounted.

Selon une autre caractéristique de la présente invention, le dispositif d'entraînement comporte des moyens de déblocage de ces moyens de freinage actionnés par les moyens de commande entraînant la vis sans fin.According to another characteristic of the present invention, the drive device comprises means for releasing these braking means actuated by the control means driving the worm.

Les avantages obtenus grâce à cette invention consistent essentiellement en ce que la coopération entre les moyens de freinage et l'arbre sur lequel est montée la roue dentée évite l'entraînement par saccade du tablier d'un volet roulant. Par ailleurs, le déblocage de ces moyens de freinage, assuré par la simple rotation de la manivelle ou de la tringle facilite considérablement la manoeuvre de ce dispositif d'entraînement.The advantages obtained thanks to this invention consist essentially in that the cooperation between the braking means and the shaft on which the toothed wheel is mounted avoids the jerky drive of the apron of a rolling shutter. Furthermore, the unlocking of these braking means, provided by the simple rotation of the crank or the rod considerably facilitates the operation of this drive device.

De plus, un autre avantage de la présente invention consiste en ce que l'action des moyens de freinage est partiellement annihilée au cours du déploiement ou du repliement du tablier, ce qui évite à l'usager de compenser, par l'intermédiaire des moyens de commande, les frottements exercés par lesdits moyens de freinage.In addition, another advantage of the present invention consists in that the action of the braking means is partially annihilated during the deployment or folding of the apron, which avoids the user to compensate, by means of the means control, the friction exerted by said braking means.

L'invention est exposée ci-après plus en détail à l'aide de dessins représentant seulement un mode d'exécution.

  • La figure 1 représente une vue schématisée, en élévation et en coupe, du dispositif d'entraînement conforme à l'invention.
  • La figure 2 représente une vue schématisée et en coupe selon II-II de la figure 1.
  • Les figures 3 et 4 représentent schématiquement le principe de fonction du dispositif d'entraînement conforme à l'invention. On se réfère à la figure 1.
The invention is set out below in more detail with the aid of drawings representing only one embodiment.
  • Figure 1 shows a schematic view, in elevation and in section, of the drive device according to the invention.
  • FIG. 2 represents a diagrammatic view in section along II-II of FIG. 1.
  • Figures 3 and 4 schematically represent the principle of function of the drive device according to the invention. We refer to figure 1.

La présente description fait référence à un dispositif d'entraînement appliqué plus particulièrement à des volets roulants. Cependant, il est bien évident qu'un tel dispositif d'entraînement est applicable dans d'autres domaines, notamment à chaque fois qu'il sera nécessaire d'entraîner en rotation un arbre duquel et sur lequel s'enroule un élément quelconque dont il convient de compenser le poids au cours des manoeuvres d'enroulement et/ou de déroulement.The present description refers to a drive device applied more particularly to roller shutters. However, it is quite obvious that such a drive device is applicable in other fields, in particular whenever it will be necessary to drive in rotation a shaft from which and on which any element is wound, of which it the weight should be compensated for during the winding and / or unwinding operations.

Ainsi, le dispositif d'entraînement 1 conforme à l'invention comporte un carter 2 de forme parallélépipédique dont l'une des parois latérales 3 constitue un couvercle amovible 4 refermant ledit carter 2. Dans ce dernier, est logée une vis sans fin 5 prolongée de part et d'autre par des tronçons d'arbre 6, 7 de diamètre sensiblement inférieur et maintenus en libre rotation à leurs extrémités 8, 9 par des parois latérales 10, 11 du carter 2.Thus, the drive device 1 according to the invention comprises a casing 2 of parallelepiped shape, one of the side walls 3 of which constitutes a removable cover 4 closing said casing 2. In the latter, an endless worm 5 is housed on either side by shaft sections 6, 7 of substantially smaller diameter and kept in free rotation at their ends 8, 9 by side walls 10, 11 of the casing 2.

La vis sans fin 5 est en mesure d'être entraînée en rotation par des moyens de commande (non représentés), par exemple une manivelle, une tringle ou autre, actionnées par l'usager. La transmission de ce mouvement de rotation de la vis sans fin 5 est répercutée sur une roue dentée 12 s'engrénant sur cette dernière et montée sur un arbre 13 qui peut correspondre, par exemple, à l 'extrémité d'un arbre d'entraînement d'un volet roulant. Cependant, cet arbre 13 sur lequel est montée cette roue dentée 12 peut être dépendant du dispositif d'entraînement 1 et présenter ses extrémités 14, 15 engagées dans des paliers 16 et 17 solidaires des parois latérales 3 du carter 2. Dans ces conditions, l'arbre 13 est prolongé par un embout 18 se présentant saillant par rapport audit carter 2 et permettant d'assurer la connexion à un arbre d'entraînement d'un volet roulant ou autre.The worm 5 is able to be rotated by control means (not shown), for example a crank, a rod or the like, actuated by the user. The transmission of this rotary movement of the worm 5 is passed on to a toothed wheel 12 meshing thereon and mounted on a shaft 13 which may correspond, for example, to the end of a drive shaft a rolling shutter. However, this shaft 13 on which this toothed wheel 12 is mounted may be dependent on the drive device 1 and have its ends 14, 15 engaged in bearings 16 and 17 integral with the side walls 3 of the casing 2. Under these conditions, the 'shaft 13 is extended by a tip 18 which is projecting from said housing 2 and for ensuring the connection to a drive shaft of a roller shutter or the like.

Selon l'invention, ce dispositif d'entraînement 1 comporte des moyens de freinage 19 qui sont en mesure de coopérer avec l'arbre 13 sur lequel est montée la roue dentée 12. Préférentiellement, ces moyens de freinage 19 se composent d'un tambour de frein 20 monté fixe sur l'arbre 13 et de sabots 21, 22 disposés dans la partie inférieure 23 du carter 2 et coopérant avec ledit tambour de frein 20.According to the invention, this drive device 1 comprises braking means 19 which are able to cooperate with the shaft 13 on which the toothed wheel is mounted 12. Preferably, these braking means 19 consist of a drum brake 20 fixedly mounted on the shaft 13 and shoes 21, 22 arranged in the lower part 23 of the casing 2 and cooperating with said brake drum 20.

Plus précisément, les sabots 21 et 22 reposent, de manière coulissante, sur le fond 24 du carter 2 et sont situés de part et d'autre du plan médian vertical 25 du dispositif d'entraînement 1. De plus, des éléments élastiques 26 coopérant avec les parois latérales 10, 11 dudit carter 2, repoussent les sabots 21, 22 contre la périphérie 27 du tambour de frein 20. A cet effet, il est à remarquer que les éléments élastiques 26 sont logés dans des trous borgnes 48 usinés dans les parois latérales 49 des sabots 21, 22, ces éléments élastiques 26 venant en appui, simultanément, contre le fond des trous borgnes 48 et contre les parois latérales 10, 11 du carter 2.More specifically, the shoes 21 and 22 rest, in a sliding manner, on the bottom 24 of the casing 2 and are located on either side of the vertical median plane 25 of the drive device 1. In addition, elastic elements 26 cooperating with the side walls 10, 11 of said casing 2, push the shoes 21, 22 against the periphery 27 of the brake drum 20. For this purpose, it should be noted that the elastic elements 26 are housed in blind holes 48 machined in the side walls 49 of the shoes 21, 22, these elastic elements 26 coming to bear, simultaneously, against the bottom of the blind holes 48 and against the side walls 10, 11 of the casing 2.

Avantageusement, le tambour de frein 20 présente une configuration sensiblement identique à une poulie et comporte sur sa périphérie 27 une gorge 28 dont les parois latérales 29 vont en s'évasant vers l'extérieur. Dans cette gorge 28 s'engage un rebord 30 solidaire de chacun des sabots 21, 22 et empruntant une forme curviligne, ajustée au diamètre du tambour de frein 20. Il est à remarquer que ce rebord 30 présente une section sensiblement triangulaire de sorte que ses côtés latéraux 31, 32 coopèrent aisément avec les parois latérales 29 de la gorge 28.Advantageously, the brake drum 20 has a configuration substantially identical to a pulley and has on its periphery 27 a groove 28 whose side walls 29 are flared outward. In this groove 28 engages a flange 30 integral with each of the shoes 21, 22 and borrowing a curvilinear shape, adjusted to the diameter of the brake drum 20. It should be noted that this flange 30 has a substantially triangular section so that its lateral sides 31, 32 easily cooperate with the lateral walls 29 of the groove 28.

En raison de cette disposition particulière, on constate que la rotation de l'arbre 13 dans l'un ou l'autre sens provoque l'engagement d'un des sabots 21, 22 sous le tambour de frein 20, d'où résulte une augmentation des forces de frottement et le blocage de ce dernier.Due to this particular arrangement, it can be seen that the rotation of the shaft 13 in one or the other direction causes the engagement of one of the shoes 21, 22 under the brake drum. 20, which results in an increase in the friction forces and the blocking of the latter.

Ainsi, lorsque l'usager interrompt son action sur les moyens de commande, le simple poids du tablier d'un volet roulant provoque le blocage en rotation de l'arbre d'entraînement de celui-ci. De ce fait, il est possible de conférer audit tablier une position semi-déroulée quelconque. Cependant, il est bien évident que l'effet de ces moyens de freinage 19 doit être annihilé lorsque l'usager désire soit déployer, soit replier le tablier du volet roulant. Dans ce but, le dispositif d'entraînement 1 comporte également des moyens de déblocage 33 de ces moyens de freinage 19 actionnés par l'intermédiaire des moyens de commande.Thus, when the user interrupts his action on the control means, the simple weight of the apron of a roller shutter causes the rotation shaft of the drive shaft to stop. Therefore, it is possible to give said apron any semi-unrolled position. However, it is obvious that the effect of these braking means 19 must be canceled out when the user wishes to either deploy or fold up the roller shutter deck. For this purpose, the drive device 1 also includes means 33 for unlocking these braking means 19 actuated by means of the control means.

Avantageusement, ces moyens de déblocage 33 consistent, en fait, en des moyens permettant de repousser le sabot 21 ou 22 ayant tendance à s'engager sous le tambour de frein 20 en raison, d'une part, des frottements et, d'autre part, du sens de rotation de ce dernier.Advantageously, these unlocking means 33 consist, in fact, of means making it possible to push back the shoe 21 or 22 which tends to engage under the brake drum 20 due, on the one hand, to friction and, on the other hand part, the direction of rotation of the latter.

Selon un mode d'exécution préférentiel, ces moyens de déblocage 33 consistent, d'une part, en des moyens 34 assurant un jeu axial à la vis sans fin 5. A cet effet, les extrémités 8, 9 des tronçons d'arbre 6, 7 prolongeant de part et d'autre ladite vis sans fin 5 sont engagées de manière coulissante dans des orifices 35 usinés dans les parois latérales 10, 11 du carter 2.According to a preferred embodiment, these unlocking means 33 consist, on the one hand, of means 34 ensuring an axial play in the worm 5. For this purpose, the ends 8, 9 of the shaft sections 6 , 7 extending on either side of said worm screw 5 are slidably engaged in orifices 35 machined in the side walls 10, 11 of the casing 2.

D'autre part, ces moyens de déblocage 33 consistent en une coopération entre les sabots 21, 22 et la vis sans fin 5.On the other hand, these unlocking means 33 consist of cooperation between the shoes 21, 22 and the worm 5.

Plus précisément, lesdits sabots 21, 22 sont prolongés dans leur partie supérieure 36 par un corps 37 pourvu d'un alésage 38 servant de passage aux tronçons d'arbre 6, 7 de la vis sans fin 5. De plus, il a été cité plus haut que cette dernière présente un diamètre sensiblement supérieur aux tronçons d'arbre 6, 7. Ceci permet d'obtenir des épaulements 39, 40 aux extrémités de la vis sans fin 5, au niveau du raccordement desdits tronçons d'arbre 6, 7.More specifically, said shoes 21, 22 are extended in their upper part 36 by a body 37 provided with a bore 38 serving as a passage for the shaft sections 6, 7 of the worm screw 5. In addition, it has been cited higher than the latter has a diameter substantially greater than the shaft sections 6, 7. This makes it possible to obtain shoulders 39, 40 at the ends of the worm 5, at the connection of said shaft sections 6, 7.

Contre ces épaulements 39, 40 prennent appui des butées à billes 41 montées sur les tronçons d'arbre 6, 7 et coopérant avec la face interne 42 du corps 37 de chacun des sabots 21, 22. Il est à remarquer que ces derniers sont repoussés en direction des butées à billes 41 en raison des éléments élastiques 26 coopérant avec les parois latérales 10, 11 du carter 2.Against these shoulders 39, 40 bear ball bearings 41 mounted on the shaft sections 6, 7 and cooperating with the internal face 42 of the body 37 of each of the shoes 21, 22. It should be noted that the latter are pushed back in the direction of the ball bearings 41 due to the elastic elements 26 cooperating with the side walls 10, 11 of the casing 2.

L'avantage de ces butées à billes 41 consiste essentiellement à réduire considérablement les frottements entre le corps 37 des sabots 21, 22 et la vis sans fin 5 lors de la rotation de cette dernière.The advantage of these thrust ball bearings 41 consists essentially in considerably reducing the friction between the body 37 of the shoes 21, 22 and the worm screw 5 during the rotation of the latter.

Le principe de fonctionnement de ces moyens de déblocage 33 décrits ci-dessus est plus particulièrement représenté dans les figures 3 et 4.The operating principle of these release means 33 described above is more particularly shown in FIGS. 3 and 4.

Ainsi, lors de l'entraînement de la vis sans fin 5 par l'intermédiaire des moyens de commande sur lesquels agit l'usager, ladite vis sans fin 5 exerce une force tangentielle sur la roue dentée 12 entraînant cette dernière par exemple dans le sens de rotation de la flèche 43, tel que visible dans la figure 3. En raison, par exemple, du poids d'un tablier d'un volet roulant, la roue dentée 12 exerce une contre réaction sur la vis sans fin 5 provoquant le coulissement axial de cette dernière dans le sens de la flèche notée 44 de la figure 3. Au cours de son coulissement, la vis sans fin 5 et notamment la butée à bille 41 repoussent le sabot 22 qui aurait tendance à s'engager sous le tambour de frein 20 en raison du sens de rotation de ce dernier indiqué par la flèche 43.Thus, during the driving of the worm 5 by means of the control means on which the user acts, said worm 5 exerts a tangential force on the toothed wheel 12 driving the latter for example in the direction of rotation of the arrow 43, as visible in FIG. 3. Due, for example, to the weight of an apron of a rolling shutter, the toothed wheel 12 exerts a negative reaction on the worm 5 causing the sliding axial of the latter in the direction of the arrow noted 44 in Figure 3. During its sliding, the worm 5 and in particular the ball bearing 41 push the shoe 22 which would tend to engage under the drum brake 20 due to the direction of rotation of the latter indicated by arrow 43.

En conséquence, seul le sabot 21 est en contact avec le tambour de frein 20 durant l'entraînement de la vis sans fin 5. De plus, il est à remarquer que ce sabot 21 est sensiblement repoussé de la périphérie 27 du tambour de frein 20 en raison du sens de rotation appliqué à la roue dentée 12.Consequently, only the shoe 21 is in contact with the brake drum 20 during the drive of the worm screw 5. In addition, it should be noted that this shoe 21 is substantially pushed back from the periphery 27 of the brake drum 20 due to the direction of rotation applied to the toothed wheel 12.

Lors d'une interruption de la rotation de la vis sans fin 5, le tablier du volet roulant a tendance, de par son poids, à entraîner en rotation l 'arbre 13 et notamment le tambour de frein 20 en sens contraire repéré par la flèche 45, ce qui provoque, inévitablement l'engagement du sabot 21 sous ce dernier.When the rotation of the worm 5 is interrupted, the roller shutter deck tends, by its weight, to rotate the shaft 13 and in particular the brake drum 20 in the opposite direction, marked by the arrow 45, which inevitably causes the engagement of the shoe 21 under the latter.

Il est bien évident qu'en manoeuvrant les moyens de commande de manière à conférer à la vis sans fin 5 un sens de rotation contraire au précédent, ladite vis sans fin coulisse axialement dans un sens opposé visualisé par la flèche 46 dans la figure 4. Il en résulte le retrait du sabot 21 et la libre rotation de la roue dentée 12 dans le sens repéré par la flèche 47 dans cette même figure 4.It is quite obvious that by operating the control means so as to give the endless screw 5 a direction of rotation contrary to the previous one, said endless screw slides axially in an opposite direction shown by the arrow 46 in FIG. 4. This results in the removal of the shoe 21 and the free rotation of the toothed wheel 12 in the direction indicated by the arrow 47 in this same FIG. 4.

Ainsi, les avantages obtenus grâce à la présente invention consistent essentiellement en ce que la manoeuvre du dispositif d'entraînement, par exemple d'un tablier de volet roulant, se fait de manière particulièrement aisée. En effet, la simple action de l'usager sur les moyens de commande provoque le déblocage des moyens de freinage et assure une efficacité maximum audit dispositif d'entraînement.Thus, the advantages obtained thanks to the present invention essentially consist in that the operation of the drive device, for example of a roller shutter curtain, is done in a particularly easy manner. Indeed, the simple action of the user on the control means causes the braking means to be released and ensures maximum efficiency for said drive device.

Contrairement, à chaque interruption de l'action sur lesdits moyens de commande, le tablier engendre, de par son propre poids, le blocage du dispositif d'entraînement. Ceci permet, d'une part, d'éviter les retombées brutales dudit tablier et, d'autre part, de bloquer ce tablier dans une positions semi-­déployée quelconque.In contrast, each time the action on said control means is interrupted, the deck generates, by its own weight, the locking of the drive device. This allows, on the one hand, to avoid the sudden fallout of said apron and, on the other hand, to block this apron in any semi-deployed position.

Claims (10)

1. Dispositif d'entraînement (1), notamment pour volet roulant, comprenant un carter (2) servant de logement à une vis sans fin (5) entraînée en rotation par des moyens de commande, tels que manivelle, tringle ou autre, et coopérant avec une roue dentée (12), montée soit à l'extrémité d'un arbre d'entraînement correspondant audit volet roulant, soit sur un tronçon d'arbre (13) apte à être connecté à cet arbre d'entraînement, caractérisé par le fait qu'il comporte des moyens de freinage (19) coopérant avec l'arbre ou le tronçon d'arbre (13) sur lequel est montée la roue dentée (12).1. Drive device (1), in particular for rolling shutter, comprising a casing (2) serving as a housing for an endless screw (5) driven in rotation by control means, such as crank, rod or other, and cooperating with a toothed wheel (12), mounted either at the end of a drive shaft corresponding to said rolling shutter, or on a section of shaft (13) capable of being connected to this drive shaft, characterized by the fact that it comprises braking means (19) cooperating with the shaft or the shaft section (13) on which the toothed wheel (12) is mounted. 2. Dispositif d'entraînement (1), selon la revendication 1, caractérisé par le fait qu'il comporte des moyens de déblocage (33) desdits moyens de freinage (19), actionnés par l'intermédiaire des moyens de commande.2. Drive device (1) according to claim 1, characterized in that it comprises unlocking means (33) of said braking means (19), actuated by means of the control means. 3. Dispositif d'entraînement (1), selon la revendication 1, caractérisé par le fait que les moyens de freinage (19) se composent, d'une part, d'un tambour de frein (20) monté fixe sur l'arbre ou le tronçon d'arbre (13) pourvu de la roue dentée (12) et, d'autre part, de sabots (21, 22) disposés de part et d'autre du tambour de frein (20) et coopérant avec ce dernier.3. Drive device (1) according to claim 1, characterized in that the braking means (19) consist, on the one hand, of a brake drum (20) mounted fixed on the shaft or the shaft section (13) provided with the toothed wheel (12) and, on the other hand, shoes (21, 22) arranged on either side of the brake drum (20) and cooperating with the latter . 4. Dispositif d'entraînement (1), selon les revendications 1 et 3, caractérisé par le fait que les sabots (21, 22) reposent, de manière coulissante, sur le fond (24) du carter (2) et sont repoussés par des éléments élastiques (26) coopérant avec les parois latérales (10, 11) du carter (2), contre la périphérie (27) du tambour de frein (20).4. Drive device (1) according to claims 1 and 3, characterized in that the shoes (21, 22) rest, in a sliding manner, on the bottom (24) of the housing (2) and are pushed back by elastic elements (26) cooperating with the side walls (10, 11) of the casing (2), against the periphery (27) of the brake drum (20). 5. Dispositif d'entraînement (1), selon la revendication 3, caractérisé par le fait que le tambour de frein (20) présente, sur sa périphérie (27), une gorge (28) et que les sabots (21, 22) sont pourvus d'un rebord (30) de forme curviligne, ajustée au diamètre du tambour de frein (20), ce rebord (30) présentant, en outre, une section en concordance avec celle de la gorge (28) pour assurer son engagement dans cette dernière.5. Drive device (1) according to claim 3, characterized in that the brake drum (20) has, on its periphery (27), a groove (28) and that the shoes (21, 22) are provided with a curvilinear rim (30), adjusted to the diameter of the brake drum (20), this rim (30) having, moreover, a cross section corresponding to that of the groove ( 28) to ensure its engagement in the latter. 6. Dispositif d'entraînement (1), selon les revendications 2 et 3, caractérisé par le fait que les moyens de déblocage (33) sont des moyens pour repousser le sabot (21) ou (22) ayant tendance à s'engager sous le tambour de frein (20) selon le sens de rotation de ce dernier et sont composés de moyens (34) assurant un jeu axial à la vis sans fin (5) et d'une coopération entre les sabots (21, 22) et cette dernière.6. Drive device (1) according to claims 2 and 3, characterized in that the unlocking means (33) are means for pushing the shoe (21) or (22) tending to engage under the brake drum (20) according to the direction of rotation of the latter and are composed of means (34) ensuring axial play in the worm (5) and of cooperation between the shoes (21, 22) and this last. 7. Dispositif d'entraînement (1), selon la revendication 6, caractérisé par le fait que les moyens (34) sont constitués de deux tronçons d'arbre (6, 7) prolongeant de part et d'autre la vis sans fin (5) et présentant leur extrémité (8, 9) engagée, de manière coulissante, dans un orifice (35) usiné dans les parois latérales (10, 11) du carter (2).7. Drive device (1) according to claim 6, characterized in that the means (34) consist of two shaft sections (6, 7) extending on either side the worm ( 5) and having their end (8, 9) slidably engaged in an orifice (35) machined in the side walls (10, 11) of the casing (2). 8. Dispositif d'entraînement (1), selon les revendications 6 et 7, caractérisé par le fait que les sabots (21, 22) sont prolongés, dans leur partie supérieure (36), d'un corps (37) pourvu d'un alésage (38) servant de passage aux tronçons d'arbre (6, 7).8. Drive device (1) according to claims 6 and 7, characterized in that the shoes (21, 22) are extended, in their upper part (36), of a body (37) provided with a bore (38) serving as a passage for the shaft sections (6, 7). 9. Dispositif d'entraînement (1), selon les revendications 6 et 7, caractérisé par le fait que les tronçons d'arbre (6, 7) sont de diamètre sensiblement inférieur à celui de la vis sans fin (5) de manière à définir des épaulements (39, 40) aux extrémités de cette dernière.9. Drive device (1) according to claims 6 and 7, characterized in that the shaft sections (6, 7) are of diameter substantially smaller than that of the worm (5) so as to define shoulders (39, 40) at the ends of the latter. 10. Dispositif d'entraînement (1), selon les revendications 6 et 9, caractérisé par le fait que les épaulements (39,40) servent d'appui à des butées à billes (41) montées sur les tronçons d'arbre (6, 7) et coopérant avec la face interne (42) du corps (37) des sabots (21, 22).10. Drive device (1) according to claims 6 and 9, characterized in that the shoulders (39.40) serve as support for thrust ball bearings (41) mounted on the shaft sections (6, 7) and cooperating with the internal face (42) of the body (37) of the shoes (21, 22).
EP88440075A 1987-09-15 1988-09-12 Operating device for roller shutters Withdrawn EP0308356A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8712855 1987-09-15
FR8712855A FR2620485B1 (en) 1987-09-15 1987-09-15 DRIVE DEVICE, PARTICULARLY FOR ROLLING SHUTTER

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EP0308356A1 true EP0308356A1 (en) 1989-03-22

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EP88440075A Withdrawn EP0308356A1 (en) 1987-09-15 1988-09-12 Operating device for roller shutters

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EP (1) EP0308356A1 (en)
FR (1) FR2620485B1 (en)

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Publication number Priority date Publication date Assignee Title
ES2154113A1 (en) * 1996-03-15 2001-03-16 Fuertes Justo Miedes System for actuating venetian blinds with roll-up slats
US8887788B2 (en) 1997-11-04 2014-11-18 Russell L. Hinckley, SR. Methods for operating window covers

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Publication number Priority date Publication date Assignee Title
FR558011A (en) * 1922-02-17 1923-08-20 Improvements in motion transmissions by worm gear
FR1205629A (en) * 1958-05-07 1960-02-03 Distrib Des App Levquentin Soc Descent regulator brake, especially for lifting devices
FR1394895A (en) * 1964-02-25 1965-04-09 Grosfillex Freres Lowering brake control device for roller shutters, blinds or the like
CH409328A (en) * 1963-11-30 1966-03-15 D Hozier Edmond De Vassart Self-balancing roller shutter operating device
FR1535644A (en) * 1967-06-20 1968-08-09 Improvements to lifting devices and the like
DE1509412A1 (en) * 1961-06-09 1969-06-04 Hunter Douglas Int Quebec Ltd Self-braking drive device for the operating shaft of a blind, a roller shutter or the like.
DE3329986A1 (en) * 1983-08-19 1985-02-28 Bautex, Adolf Stöver Söhne KG, 2857 Langen Blind
EP0154155A1 (en) * 1984-02-02 1985-09-11 Rhein-Getriebe GmbH Turning drive
DE3433561C1 (en) * 1984-09-13 1986-03-20 GfA - Antriebstechnik GmbH, 4000 Düsseldorf Safety gear

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR558011A (en) * 1922-02-17 1923-08-20 Improvements in motion transmissions by worm gear
FR1205629A (en) * 1958-05-07 1960-02-03 Distrib Des App Levquentin Soc Descent regulator brake, especially for lifting devices
DE1509412A1 (en) * 1961-06-09 1969-06-04 Hunter Douglas Int Quebec Ltd Self-braking drive device for the operating shaft of a blind, a roller shutter or the like.
CH409328A (en) * 1963-11-30 1966-03-15 D Hozier Edmond De Vassart Self-balancing roller shutter operating device
FR1394895A (en) * 1964-02-25 1965-04-09 Grosfillex Freres Lowering brake control device for roller shutters, blinds or the like
FR1535644A (en) * 1967-06-20 1968-08-09 Improvements to lifting devices and the like
DE3329986A1 (en) * 1983-08-19 1985-02-28 Bautex, Adolf Stöver Söhne KG, 2857 Langen Blind
EP0154155A1 (en) * 1984-02-02 1985-09-11 Rhein-Getriebe GmbH Turning drive
DE3433561C1 (en) * 1984-09-13 1986-03-20 GfA - Antriebstechnik GmbH, 4000 Düsseldorf Safety gear

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2154113A1 (en) * 1996-03-15 2001-03-16 Fuertes Justo Miedes System for actuating venetian blinds with roll-up slats
US8887788B2 (en) 1997-11-04 2014-11-18 Russell L. Hinckley, SR. Methods for operating window covers
US9316051B2 (en) 1997-11-04 2016-04-19 Russell L. Hinckley, SR. Window cover system with spring drive arrangement
US9328554B2 (en) 1997-11-04 2016-05-03 Russell L. Hinckley, SR. Spring drive systems for window covers
US9359814B2 (en) 1997-11-04 2016-06-07 Russel L. Hinckley Systems for maintaining window covers
US9574396B2 (en) 1997-11-04 2017-02-21 Russell L. Hinckley, SR. Systems for maintaining window covers

Also Published As

Publication number Publication date
FR2620485B1 (en) 1989-12-01
FR2620485A1 (en) 1989-03-17

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