EP0645518B1 - Device for driving or putting under tension of a supple protection element such as a web, a curtain, or an apron - Google Patents

Device for driving or putting under tension of a supple protection element such as a web, a curtain, or an apron Download PDF

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Publication number
EP0645518B1
EP0645518B1 EP94440061A EP94440061A EP0645518B1 EP 0645518 B1 EP0645518 B1 EP 0645518B1 EP 94440061 A EP94440061 A EP 94440061A EP 94440061 A EP94440061 A EP 94440061A EP 0645518 B1 EP0645518 B1 EP 0645518B1
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EP
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Prior art keywords
control shaft
rolling
motor
unrolling
apron
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EP94440061A
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German (de)
French (fr)
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EP0645518A1 (en
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Louis Plumer
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Bubendorff SA
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Bubendorff SA
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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
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • E06B9/70—Operating devices or mechanisms, e.g. with electric drive comprising an electric motor positioned outside the roller

Definitions

  • the invention relates to a device for driving and tensioning a flexible protective element, such as a strip, a curtain or an apron, comprising a winding control shaft, from which and on which unrolls and coils said flexible protection element, and a unwinding control shaft acting on the latter, directly or by means of transmission for its deployment, the winding control shaft and l 'unwinding control shaft being each driven in rotation by means of a motor with which are associated braking means activated to no longer brake when one of these motors is powered.
  • this drive device comprises a winding control shaft, from which and on which the flexible element is unwound and wound.
  • This winding control shaft is driven in rotation by means of a tubular or other type of motor, this in the winding phase of the flexible element.
  • this motor is equipped with an electromagnetic brake which is activated, that is to say that it no longer brakes when the motor with which it is associated is running, that is to say during winding, but also in the deployment phase controlled by the unwinding control shaft.
  • the winding control shaft it cooperates with a motor which ensures its rotational drive during the deployment phase of the protective element.
  • this motor is associated with an electromagnetic brake which is activated, that is to say which no longer brakes, as soon as one of the motors of the winding control shaft or of the sequence control is supplied.
  • the winding control shaft and the unwinding control shaft are arranged parallel to each other and of on either side of the surface to be covered by means of the flexible protective element. Furthermore, this is, initially, wound around the winding control shaft and comprises, at the height of its free end, straps joining the unwinding control shaft where they are wound on drums equipping the latter.
  • this type of flexible protection element is intended to be deployed in an almost horizontal position or with a slight slope above the surface to be protected. Also, this poses the problem of tensioning this flexible element and of maintaining it in such a position. Indeed, by its own weight, this flexible protective element necessarily collapses between the winding control shaft and the unwinding control shaft, more particularly during the deployment phase. It should be recalled, in fact, that during the operation of one of the motors, the brakes associated with each of them are activated in order to allow free rotation of the winding control shaft and of the sequence control tree.
  • This auxiliary brake can be of the mechanical or eddy current type.
  • an eddy current brake is effective as soon as there is rotation. Consequently, it may be the cause of a loosening of the protective element at the end of the deployment stroke. Also, it only partially solves the problem posed.
  • a mechanical brake, of the friction type frequently incorporates a rock wheel so as not to operate in a determined direction of rotation, that is to say in the direction of rotation taken by the control shaft. winding in winding phase.
  • such a mechanical brake which provides a solution to the drawbacks encountered with an eddy current brake, proves to be particularly complex and leads to a significant increase in the cost price of the drive device.
  • Such problems of energizing or, more particularly, of maintaining tension are also found at the level of the flexible windable protective elements, of the rolling shutter type, the deck of which is almost horizontal in movement, or at least of insufficient inclination for its deployment to be carried out by its own weight.
  • said rolling shutter comprises a control shaft for winding the deck mounted in rotation in a box inside which is also located the control shaft for unwinding this deck.
  • the latter is disposed below the winding control shaft and comprises, at its ends, toothed wheels meshing in openings arranged at the ends of the blades making up said deck.
  • the unwinding control shaft is rotated by a motor associated with it. It also includes a brake which is activated, that is to say which no longer brakes when the motor is powered and, on the contrary, prevents the rotation of the unwinding control shaft in the event of stop of operation. of the motor so as to block, on the descent, the roller shutter curtain.
  • the brake is also activated so that it no longer brakes when the winding control shaft is rotated by the motor which is specific to it.
  • this curtain winding control shaft is often devoid of electromagnetic brake. Indeed, as already specified, the blocking of the bulkhead is obtained by means of the brake motor fitted to the unwinding control shaft. Also, the winding control shaft is not subjected to a significant torque corresponding to the total weight of the deck.
  • the motor of this winding control shaft is associated with auxiliary braking means.
  • the reducer creates a braking force capable of opposing the rotation of the winding shaft under the influence of the reduced torque produced by the few blades of the deck separating the unwinding control shaft from this winding control shaft.
  • the deck of such roller shutters is designed by a juxtaposition of slats which not only are articulated with respect to one another, but often are also telescopic in a direction perpendicular to them. so as to be able to give the deck an openwork position. More precisely, when the blades are kept apart from each other, they reveal days allowing the passage of light rays. In fact, this type of telescopic articulation connecting the blades of a roller shutter deck poses significant difficulties, especially in the context of rolling shutters with almost horizontal deployment. More specifically, such roller shutters are applied to roof windows or the like. As a result, they are particularly exposed to the weather.
  • the The engine since the winding of the deck is only obtained under the rotational drive of the winding control shaft, the The engine must necessarily have sufficient torque so as to be able to compensate for the torque produced by the total weight of the bulkhead.
  • this excessive torque constitutes a handicap in the event of blockage of the apron, in particular, in its upper part housed in the box. Indeed, being greater than the mechanical strength of the deck. it can lead to the rupture of it.
  • the object of the present invention is, precisely, to provide a solution to the drawbacks encountered in the above-mentioned cases, this through simple solutions, employing standard equipment and, consequently, inexpensive.
  • the invention relates to a device for driving and tensioning a flexible protective element such as a strip, a curtain or an apron, comprising a winding control shaft from which and on which unrolls and winds up said flexible protection element and an unwinding control shaft acting on the latter, directly or by means of transmission, with a view to its deployment, the winding control shaft and l 'unwinding control shaft each being driven in rotation by means of a motor with which associated braking means activated so as to no longer brake when one of these motors is powered, characterized in that it comprises means for management of the power supply of the motors capable of ensuring the operation, at reduced power and in the opposite direction of the operation, of the motor of the winding control shaft or of the unwinding control shaft, depending on whether the 'o n is in phase, respectively, of unwinding or winding, in order to create a resistant torque with respect to this maneuver controlled by the operation of the motor, respectively, of the unwinding control shaft or of the shaft winding control.
  • the invention also relates to a device for driving and tensioning a flexible protective element, such as a strip, a curtain or an apron, comprising a winding control shaft, from which and on which unwinds and winds up said flexible protection element, and an unwinding control shaft acting on the latter, directly or by means of transmission, with a view to its deployment, the winding control shaft and the unwinding control shaft each being driven in rotation by means of a motor with which associated braking means are activated so that they no longer brake when one of these motors is powered, characterized in that it comprises means for managing the supply of the motors capable of ensuring the operation, at reduced speed and in the same direction as the operation, of the motor of the winding control shaft or of the unwinding control shaft, according to e one is in phase, respectively, of unwinding or winding, with a view to creating a resistant torque with respect to this maneuver controlled by the operation of the motor, of the unwinding control shaft or, respectively, of the winding control shaft.
  • the invention relates to a device for driving and tensioning a flexible protective element, such as a strip, a curtain or an apron, comprising a winding control shaft, from which and on which unwinds and winds up the flexible protection element, and an unwinding control shaft acting on the latter, directly, or by means of transmission, with a view to its deployment, the control shaft d winding and the unwinding control shaft each being driven in rotation by means of a motor to which at least for the motor of the unwinding control shaft are associated braking means, possibly activated to no longer brake when one of these motors is powered, characterized in that it comprises means for managing the power supply of these motors capable of ensuring, at least in the winding phase, the operation, on the one hand, of the drive shaft motor bearing at reduced power and, on the other hand, the motor of the unwinding control shaft at its nominal power and in the direction of the maneuver.
  • the motors are preferably chosen with identical characteristics.
  • the present invention relates to a drive and tensioning device 1 for flexible protective element 2 which can be wound up of the strip or curtain type 3, as shown in FIG. 1, or again of the apron type 4 for rolling shutter, as illustrated in FIG. 2.
  • this drive and tensioning device 1 aims to ensure the deployment horizontally or with a slight inclination, of this flexible protective element 2. Also, it comprises, first of all, a winding control shaft 5 from which and on which the flexible protective element 2 is unwound and wound up. It further comprises a unwinding control shaft 6 acting on this flexible protective element 2, either directly as shown in Figure 2, or via transmission means 7, in particular straps, corresponding to the embodiment of Figure 1, this in order to obtain its deployment.
  • the control shaft of unwinding 6 is arranged parallel to the winding control shaft 5 and is located, with respect to the latter, on the other side of the surface 8 to be covered and to be protected.
  • the winding control shaft 5 and the unwinding control shaft 6 are each driven in rotation by means of a motor, respectively 12, 13, which, as shown, may be of the type tubular or placed at the end of the shaft.
  • a motor respectively 12, 13, which, as shown, may be of the type tubular or placed at the end of the shaft.
  • Each of these motors 12, 13 is associated with braking means 14, 15, constituted, for example, by a brake of the electromagnetic type.
  • This brake 14, 15 is activated, that is to say that it no longer brakes when any of the motors 12, 13 is supplied.
  • the brakes 14, 15 are deactivated so that the winding control shaft 5, respectively, the unwinding control shaft 6 is locked in rotation .
  • the drive and energizing device within the framework of the embodiment illustrated in FIG. 1, comprises means 16 for managing the power supply to the motors 12, 13 in the same ensure the operation, at reduced power and in the opposite direction of the maneuver during execution, of the motor 12, 13, of the drive control shaft 5 or of the unwinding control shaft 6, according to that one is in phase, respectively, of deployment or winding of the flexible element 2.
  • the motor 13 in deployment phase, not only the motor 13 is supplied so as to drive in rotation l unwinding control shaft 6 causing the transmission means 7 to be wound on the drums 9, 10, but also the motor 12 of the winding control shaft 5, but at reduced power and in the opposite direction by in relation to the maneuver in progress, i.e. the deployment of the flexible element 2.
  • this motor 12 operating in reverse, produces a resistant torque with respect to the operation controlled by the operation of the motor 13 of the unwinding control shaft 6.
  • This situation is the same, but conversely, during the folding phase of the flexible element 2.
  • the motor 12 of the winding control shaft 5 is normally supplied, while the motor 13 of the control shaft unwinding 6 is supplied with reduced power and operates in reverse of the operation to produce a resistant torque.
  • This resistant torque can also be obtained by ensuring the operation of the motor 12, 13 in the same direction as the maneuver being executed, but at a lower speed compared to that of the motor respectively 13, 12, depending on whether one is, respectively, during deployment or folding of the flexible element 2.
  • the power of the motors 12, 13 may be reduced, since the latter assist each other during the various maneuvers.
  • the resistive torque thus produced at the level of the shaft of winding control 5 or the unwinding control shaft 6, ensures that the flexible element 2 is kept in tension, both during the maneuvers and at the time when these motors 12, 13 stop operating.
  • the unwinding control shaft 6 being arranged downstream of the winding control shaft, acts directly on the blades 17 of the deck 4 making up the flexible element 2.
  • this unwinding control shaft 6 comprises, at its ends, drive means 22 in the form of toothed wheels 23 cooperating with the blades 17 coming to mesh in openings 24 made at the ends of the latter.
  • management means 16 of the supply of motors 12, 13 associated, respectively, with this winding control shaft 5 and with the unwinding control shaft 6, can guarantee the supply at reduced power and in the opposite direction of one of these motors 12 , 13 with a view to creating a resistant torque opposing the maneuver in progress, respectively, the deployment and the folding of the flexible element 2.
  • the motor 12 of the winding control shaft 5 is suitably supplied, while the motor 13 of the unwinding control shaft 6 is supplied with a reduced power and in a reverse direction of rotation so as to produce a resisting torque with respect to the folding element's maneuver of the flexible element 2.
  • the motor 12, associated with the control shaft of winding 5 must have a power not only sufficient to cope with the total weight of the deck 4, but also to compensate for the resistant torque produced by the motor 13 of the unwinding control shaft 6.
  • this solution of operating the motors 12, 13 in the same direction, during a deployment maneuver or, more particularly, of folding the apron 4 has the advantage that these motors 12, 13 assist each other , during these different maneuvers.
  • this standardization of motors contributes significantly to a reduction in the cost price of such a rolling shutter.
  • an advantageous solution consists in choosing a sufficient winding control shaft diameter 5, that is to say which allows, from the initial winding phase, to ensure, under the influence of the rotation of the motor 12, a theoretical linear speed to the bulkhead 4 which is greater than the actual linear speed transmitted to this bulkhead 4 via the unwinding control shaft 6 and therefore of the motor 13. More precisely, the diameter of the winding control shaft 5 will be chosen to be greater than the nominal diameter of the toothed wheels 23 equipping, at its ends, the unwinding control shaft 6 and coming to mesh in the openings 24 present in the deck 4.
  • the braking means 14, 15 associated with the motor 12, 13 can be constituted, just as in the context of the previous embodiment, by an electromagnetic brake directly coupled to each of its motors 12, 13.
  • an electromagnetic brake directly coupled to each of its motors 12, 13.
  • braking means directly dependent on the configuration of the motor 13 and the drive means associated therewith, of the speed reducer type are, in this case, sufficient to keep the blades of the section of apron separating in tension the winding control shaft 5 and the unwinding control shaft 6 after the engines 12, 13 have stopped operating.
  • the present invention not only provides a solution to a real technical problem in the deployment of flexible protective elements horizontally or at low inclination, but, moreover, by virtue of its simplicity, turns out to be a lower cost price and allows a certain standardization at the manufacturing level. Therefore, the present invention represents a clear technical progress in the field concerned.

Abstract

The invention relates to a device for operating and tensioning a flexible protective element (2), such as a band (3), a curtain or a shutter, comprising a winding control shaft (5) and an unwinding control shaft (6) which are driven by means of a motor (12, 13) fitted with a brake (14, 15) which is activated so as to stop braking when one of these motors (12, 13) is switched on. With a view to ensuring that this flexible protective element is kept taut between the winding control shaft (5) and the unwinding control shaft (6), this operating and tensioning device comprises means (16) for controlling the power supplied to the motors (12, 13) so that a torque is generated by one of these motors (12, 13), which torque resists the operation of the other motor (13, 12) respectively, during the stage in which the flexible protective element (2) is being unwound or wound up, respectively. <IMAGE>

Description

L'invention a trait à un dispositif d'entraînement et de mise sous tension d'un élément souple de protection, tel qu'une bande, un rideau ou un tablier, comprenant un arbre de commande d'enroulement, depuis lequel et sur lequel se déroule et s'enroule ledit élément souple de protection, et un arbre de commande de déroulement agissant sur ce dernier, directement ou par l'intermédiaire de moyens de transmission en vue de son déploiement, l'arbre de commande d'enroulement et l'arbre de commande de déroulement étant chacun entraîné en rotation au moyen d'un moteur auquel sont associés des moyens de freinage activés pour ne plus freiner lorsque l'un de ces moteurs est alimenté.The invention relates to a device for driving and tensioning a flexible protective element, such as a strip, a curtain or an apron, comprising a winding control shaft, from which and on which unrolls and coils said flexible protection element, and a unwinding control shaft acting on the latter, directly or by means of transmission for its deployment, the winding control shaft and l 'unwinding control shaft being each driven in rotation by means of a motor with which are associated braking means activated to no longer brake when one of these motors is powered.

On connaît déjà, notamment au travers du document FR-A-2.502.597, un dispositif d'entraînement d'un élément souple, du type bande ou rideau de protection, correspondant à la description ci-dessus. Ainsi, ce dispositif d'entraînement comporte un arbre de commande d'enroulement, depuis lequel et sur lequel se déroule et s'enroule l'élément souple. Cet arbre de commande d'enroulement est entraîné en rotation par l'intermédiaire d'un moteur du type tubulaire ou autre, ceci en phase d'enroulement de l'élément souple. A noter que ce moteur est équipé d'un frein électromagnétique qui est activé, c'est-à-dire qu'il ne freine plus, lorsque le moteur auquel il est associé fonctionne, c'est-à-dire en cours d'enroulement, mais, également, en phase de déploiement commandée par l'arbre de commande de déroulement. En fait, tout comme pour l'arbre de commande d'enroulement, celui-ci coopère avec un moteur lequel assure son entraînement en rotation en phase de déploiement de l'élément de protection. Là encore, à ce moteur est associé un frein électromagnétique qui est activé, c'est-à-dire qui ne freine plus, dès lors que l'un des moteurs de l'arbre de commande d'enroulement ou de l'arbre de commande de déroulement est alimenté.Already known, in particular through document FR-A-2.502.597, a device for driving a flexible element, of the protective strip or curtain type, corresponding to the description above. Thus, this drive device comprises a winding control shaft, from which and on which the flexible element is unwound and wound. This winding control shaft is driven in rotation by means of a tubular or other type of motor, this in the winding phase of the flexible element. Note that this motor is equipped with an electromagnetic brake which is activated, that is to say that it no longer brakes when the motor with which it is associated is running, that is to say during winding, but also in the deployment phase controlled by the unwinding control shaft. In fact, just as for the winding control shaft, it cooperates with a motor which ensures its rotational drive during the deployment phase of the protective element. Again, this motor is associated with an electromagnetic brake which is activated, that is to say which no longer brakes, as soon as one of the motors of the winding control shaft or of the sequence control is supplied.

Dans ce cas particulier du mode de réalisation décrit dans ce document FR-A-2.502.597, l'arbre de commande d'enroulement et l'arbre de commande de déroulement sont disposés parallèlement l'un par rapport à l'autre et de part et d'autre de la surface à recouvrir au moyen de l'élément souple de protection. Par ailleurs, celui-ci est, initialement, enroulé autour de l'arbre de commande d'enroulement et comporte, à hauteur de son extrémité libre, des sangles rejoignant l'arbre de commande de déroulement où elles s'enroulent sur des tambours équipant ce dernier.In this particular case of the embodiment described in this document FR-A-2.502.597, the winding control shaft and the unwinding control shaft are arranged parallel to each other and of on either side of the surface to be covered by means of the flexible protective element. Furthermore, this is, initially, wound around the winding control shaft and comprises, at the height of its free end, straps joining the unwinding control shaft where they are wound on drums equipping the latter.

En fait, ce type d'élément souple de protection est destiné à se déployer dans une position quasi horizontale ou avec une faible pente au-dessus de la surface à protéger. Aussi, cela pose le problème de la mise sous tension de cet élément souple et de son maintien dans une telle position. En effet, de par son propre poids, cet élément souple de protection vient, nécessairement, s'affaisser entre l'arbre de commande d'enroulement et l'arbre de commande de déroulement, plus particulièrement en phase de déploiement. Il convient de rappeler, en effet, que lors du fonctionnement de l'un des moteurs, les freins associés à chacun d'entre eux sont activés en vue d'autoriser une libre rotation de l'arbre de commande d'enroulement et de l'arbre de commande de déroulement.In fact, this type of flexible protection element is intended to be deployed in an almost horizontal position or with a slight slope above the surface to be protected. Also, this poses the problem of tensioning this flexible element and of maintaining it in such a position. Indeed, by its own weight, this flexible protective element necessarily collapses between the winding control shaft and the unwinding control shaft, more particularly during the deployment phase. It should be recalled, in fact, that during the operation of one of the motors, the brakes associated with each of them are activated in order to allow free rotation of the winding control shaft and of the sequence control tree.

Aussi, de manière à rattraper le mou de l'élément souple de protection après déploiement, il est préconisé selon le document FR-A-2.502.597, de commander le fonctionnement, pendant un laps de temps réduit, soit du moteur de l'arbre de commande de déroulement, soit celui de l'arbre de commande d'enroulement. Plus précisément, on compte sur le fait que, pendant ce laps de temps réduit, selon le cas, l'arbre de commande d'enroulement ou l'arbre de commande de déroulement, dont le moteur n'est pas activé, n'est pas entraîné en rotation en raison de son inertie. Par conséquent, il ne se produit pas un déroulement supplémentaire, soit de l'élément de protection, soit des sangles, mais un simple rattrapage du mou au niveau de cet élément souple de protection non tendu. Par conséquent, après l'arrêt de fonctionnement total des moteurs, les freins sont désactivés et empêchent la rotation, dans un sens quelconque, de cet arbre de commande d'enroulement et de l'arbre de commande de déroulement, pour, finalement, maintenir l'élément souple de protection tendu.Also, in order to catch up with the slack in the flexible protective element after deployment, it is recommended according to document FR-A-2.502.597 to control the operation, for a reduced period of time, of the engine of the unwind control shaft, that of the winding control shaft. More specifically, it is to be expected that, during this reduced period of time, as the case may be, the winding control shaft or the unwinding control shaft, the motor of which is not activated, is not not rotated due to its inertia. Consequently, there is no additional unwinding, either of the protective element or of the straps, but a simple recovery of the slack at the level of this flexible, non-tensioned protective element. Consequently, after the engines stop operating completely, the brakes are deactivated and prevent the rotation, in any direction, of this winding control shaft and the unwinding control shaft, in order, finally, to maintain the stretched flexible protection element.

L'expérience montre que ce procédé n'est que théorique, dans la mesure où, pour que cela fonctionne, il faut que le jeu à rattraper pour assurer la mise sous tension de l'élément souple de protection soit faible, sans quoi le laps de temps pendant lequel l'un des moteurs est alimenté pour assurer cette mise sous tension est, soit trop court, soit il est trop important de sorte que l'on ne peut empêcher le déroulement, simultanément, dudit élément souple de protection ou des sangles reliées à l'arbre de commande de déroulement.Experience shows that this process is only theoretical, insofar as, for this to work, the play to be made up to ensure the tensioning of the flexible protective element is low, otherwise the lapse time during which one of the motors is powered for ensuring this tensioning is either too short, or it is too important so that one cannot prevent the unwinding, simultaneously, of said flexible protection element or of the straps connected to the unwinding control shaft.

En vue de perfectionner le dispositif d'entraînement tel que décrit ci-dessus, l'on a imaginé d'associer, notamment à l'arbre de commande d'enroulement, un frein auxiliaire à même de produire un couple résistant à la rotation de cet arbre de commande d'enroulement lors du déploiement de l'élément de protection. Plus précisément, au travers d'un tel couple résistant, la traction qui doit être exercée sur les sangles par l'intermédiaire de l'entraînement en rotation de l'arbre de commande de déroulement est plus important de sorte que l'élément de protection est maintenu tendu pendant son déploiement.In order to improve the drive device as described above, it has been imagined to associate, in particular with the winding control shaft, an auxiliary brake capable of producing a torque resistant to the rotation of this winding control shaft during deployment of the protective element. More specifically, through such a resistant torque, the traction which must be exerted on the straps by means of the rotational drive of the unwinding control shaft is more important so that the protective element is kept taut during its deployment.

Ce frein auxiliaire peut être du type mécanique ou à courant de Foucault. En fait, un frein à courant de Foucault est efficace dès lors qu'il y a rotation. Par conséquent, il peut être à l'origine d'un relâchement de l'élément de protection en fin de course de déploiement. Aussi, il ne résout que partiellement le problème posé. Un frein mécanique, du type à friction intègre, fréquemment, une roue à rocher de manière à ne pas entrer en fonction dans un sens de rotation déterminé, c'est-à-dire dans le sens de rotation emprunté par l'arbre de commande d'enroulement en phase d'enroulement. Cependant, un tel frein mécanique qui apporte une solution aux inconvénients rencontrés avec un frein à courant de Foucault, s'avère particulièrement complexe et conduit à une augmentation sensible du coût de revient du dispositif d'entraînement.This auxiliary brake can be of the mechanical or eddy current type. In fact, an eddy current brake is effective as soon as there is rotation. Consequently, it may be the cause of a loosening of the protective element at the end of the deployment stroke. Also, it only partially solves the problem posed. A mechanical brake, of the friction type, frequently incorporates a rock wheel so as not to operate in a determined direction of rotation, that is to say in the direction of rotation taken by the control shaft. winding in winding phase. However, such a mechanical brake which provides a solution to the drawbacks encountered with an eddy current brake, proves to be particularly complex and leads to a significant increase in the cost price of the drive device.

A cela il faut ajouter que si, non seulement, l'on veut s'assurer que l'élément souple de protection soit tendu lorsqu'il est en position déployée, mais que les sangles le soient aussi une fois ledit élément souple de protection enroulé totalement ou partiellement, il est nécessaire d'équiper, tant l'arbre de commande d'enroulement que l'arbre de commande de déroulement d'un tel frein auxiliaire. L'on peut, bien sûr, imaginer de combiner les systèmes de sorte qu'après enroulement de l'élément souple de protection, on inverse, pendant un laps de temps, les mouvements par une commande en rotation de l'arbre de commande de déroulement pour obtenir la mise sous tension des sangles. Par conséquent, il s'agit de solutions, dans un cas, peu économiques et, dans l'autre cas, peu commodes d'utilisation.To this must be added that if, not only, it is desired to ensure that the flexible protective element is tensioned when it is in the deployed position, but that the straps are also tensioned once said flexible protective element is wound up totally or partially, it is necessary to equip both the winding control shaft and the unwinding control shaft with such an auxiliary brake. One can, of course, imagine combining the systems so that after winding of the flexible protective element, the movements are reversed for a period of time by a rotation control of the control shaft of procedure for tensioning the straps. By Consequently, these are solutions, in one case, not very economical and, in the other case, inconvenient to use.

De tels problèmes de mise sous tension ou, plus particulièrement, de maintien en tension se retrouvent, également, au niveau des éléments souples de protection enroulables, du type volet roulant, dont le tablier est à déplacement quasi horizontal, ou tout au moins d'inclinaison insuffisante pour que son déploiement s'effectue de par son propre poids.Such problems of energizing or, more particularly, of maintaining tension are also found at the level of the flexible windable protective elements, of the rolling shutter type, the deck of which is almost horizontal in movement, or at least of insufficient inclination for its deployment to be carried out by its own weight.

Un tel volet roulant est notamment décrit dans le document EP-B-0.221.829. Ainsi, ledit volet roulant comporte un arbre de commande d'enroulement du tablier monté en rotation dans un caisson à l'intérieur duquel est implanté, également, l'arbre de commande de déroulement de ce tablier. En fait, celui-ci est disposé en contrebas de l'arbre de commande d'enroulement et comporte, à ses extrémités, des roues dentées s'engrénant dans des ouvertures aménagées aux extrémités des lames composant ledit tablier. Ainsi, en cours de déploiement, l'arbre de commande de déroulement est entraîné en rotation par l'intermédiaire d'un moteur qui lui est associé. Il comporte, également, un frein qui est activé, c'est-à-dire qui ne freine plus lorsque le moteur est alimenté et, au contraire, empêche la rotation de l'arbre de commande de déroulement en cas d'arrêt de fonctionnement du moteur de manière à bloquer, à la descente, le tablier du volet roulant. Le frein est également activé de sorte qu'il ne freine plus lors de l'entraînement en rotation de l'arbre de commande d'enroulement par l'intermédiaire du moteur qui est propre à celui-ci. Dans ce type de configuration, cet arbre de commande d'enroulement du tablier est, souvent, dépourvu de frein électromagnétique. En effet, tel que déjà précisé, le blocage du tablier est obtenu par l'intermédiaire du moteur frein équipant l'arbre de commande de déroulement. Aussi, l'arbre de commande d'enroulement n'est pas soumis à un couple important correspondant au poids total du tablier.Such a roller shutter is described in particular in document EP-B-0.221.829. Thus, said rolling shutter comprises a control shaft for winding the deck mounted in rotation in a box inside which is also located the control shaft for unwinding this deck. In fact, the latter is disposed below the winding control shaft and comprises, at its ends, toothed wheels meshing in openings arranged at the ends of the blades making up said deck. Thus, during deployment, the unwinding control shaft is rotated by a motor associated with it. It also includes a brake which is activated, that is to say which no longer brakes when the motor is powered and, on the contrary, prevents the rotation of the unwinding control shaft in the event of stop of operation. of the motor so as to block, on the descent, the roller shutter curtain. The brake is also activated so that it no longer brakes when the winding control shaft is rotated by the motor which is specific to it. In this type of configuration, this curtain winding control shaft is often devoid of electromagnetic brake. Indeed, as already specified, the blocking of the bulkhead is obtained by means of the brake motor fitted to the unwinding control shaft. Also, the winding control shaft is not subjected to a significant torque corresponding to the total weight of the deck.

De plus, le moteur de cet arbre de commande d'enroulement est associé à des moyens de freinage auxiliaires. Ainsi, le réducteur crée une force de freinage à même de s'opposer à la rotation de l'arbre d'enroulement sous l'influence du couple réduit produit par les quelques lames du tablier séparant l'arbre de commande de déroulement de cet arbre de commande d'enroulement.In addition, the motor of this winding control shaft is associated with auxiliary braking means. Thus, the reducer creates a braking force capable of opposing the rotation of the winding shaft under the influence of the reduced torque produced by the few blades of the deck separating the unwinding control shaft from this winding control shaft.

Tel que déjà précisé ci-dessus, le tablier de tels volets roulants est conçu par une juxtaposition de lames qui, non seulement, sont articulées les unes par rapport aux autres, mais, souvent, sont également télescopiques suivant une direction qui leur est perpendiculaire de manière à pouvoir conférer au tablier une position ajourée. Plus précisément, lorsque les lames sont maintenues écartées les unes des autres, elles laissent apparaître des jours permettant le passage de rayons lumineux. En fait, ce type d'articulation télescopique reliant les lames d'un tablier de volet roulant pose d'importantes difficultés, tout particulièrement dans le cadre de volets roulants à déploiement quasi horizontal. Plus précisément, de tels volets roulants sont appliqués à des fenêtres de toits ou analogues. De ce fait, ils sont particulièrement exposés aux intempéries. Ainsi, malgré la présence d'un caisson de protection, l'humidité peut s'installer dans les articulations des lames situées à l'intérieur de ce caisson et, notamment, de celles s'étendant entre l'arbre de commande d'enroulement et l'arbre de commande de déroulement. Or, en cas de gel, cette humidité se transforme en glace venant bloquer les articulations de ces lames, alors que c'est, précisément, entre cet arbre de commande d'enroulement et l'arbre de commande de déroulement que ladite articulation est normalement la plus sollicitée. De ce fait, lorsque l'utilisateur cherche à manoeuvrer son volet roulant dans ces conditions, le tablier se rompt souvent à ce niveau. Il convient d'observer que ces ruptures ne se produisent que dans le cas où deux lames successives sont maintenues, sensiblement, jointives, position dans laquelle elles ne peuvent plus pivoter l'une par rapport à l'autre.As already specified above, the deck of such roller shutters is designed by a juxtaposition of slats which not only are articulated with respect to one another, but often are also telescopic in a direction perpendicular to them. so as to be able to give the deck an openwork position. More precisely, when the blades are kept apart from each other, they reveal days allowing the passage of light rays. In fact, this type of telescopic articulation connecting the blades of a roller shutter deck poses significant difficulties, especially in the context of rolling shutters with almost horizontal deployment. More specifically, such roller shutters are applied to roof windows or the like. As a result, they are particularly exposed to the weather. Thus, despite the presence of a protective box, moisture can settle in the joints of the blades located inside this box and, in particular, those extending between the winding control shaft and the unwind control shaft. However, in the event of frost, this humidity turns into ice blocking the articulations of these blades, whereas it is, precisely, between this winding control shaft and the unwinding control shaft that said articulation is normally the most requested. Therefore, when the user seeks to operate his roller shutter under these conditions, the apron often breaks at this level. It should be observed that these ruptures occur only in the case where two successive blades are maintained, substantially, contiguous, position in which they can no longer pivot relative to one another.

Ceci revient à dire que les lames du tronçon de tablier séparant l'arbre de commande d'enroulement et l'arbre de commande de déroulement, devraient être maintenues, sans cesse, écartées, de sorte qu'elles puissent, à tout moment, pivoter les unes par rapport aux autres en empêchant le gel de les immobiliser dans une position jointive.This amounts to saying that the blades of the section of apron separating the winding control shaft and the unwinding control shaft, should be kept, constantly, apart, so that they can, at any time, pivot relative to each other by preventing the gel from immobilizing them in a joined position.

De plus, étant donné que l'enroulement du tablier n'est obtenu que sous l'entraînement en rotation de l'arbre de commande d'enroulement, le moteur doit, nécessairement, disposer d'un couple suffisant de manière à pouvoir compenser le couple produit par le poids total du tablier. Or, ce couple excessif constitue un handicap en cas de blocage du tablier, notamment, dans sa partie supérieure logée dans le caisson. En effet, étant supérieur à la résistance mécanique du tablier. il peut conduire à la rupture de celui-ci.In addition, since the winding of the deck is only obtained under the rotational drive of the winding control shaft, the The engine must necessarily have sufficient torque so as to be able to compensate for the torque produced by the total weight of the bulkhead. However, this excessive torque constitutes a handicap in the event of blockage of the apron, in particular, in its upper part housed in the box. Indeed, being greater than the mechanical strength of the deck. it can lead to the rupture of it.

Finalement, l'on observera que pour délivrer cette puissance importante, le moteur doit être de taille appropriée. Il est également, de ce fait, relativement coûteux. Aussi, il est plus économique d'adapter la puissance du moteur à la taille des volets-roulants plutôt que d'utiliser un moteur standard pour une gamme de volets roulants. Il n'en reste pas moins que cette solution, adaptée jusqu'à ce jour, rend plus contraignante la gestion de la fabrication et celle des stocks.Finally, it will be observed that to deliver this significant power, the engine must be of an appropriate size. It is also, therefore, relatively expensive. Also, it is more economical to adapt the power of the motor to the size of the roller shutters rather than using a standard motor for a range of roller shutters. The fact remains that this solution, adapted to date, makes the management of production and that of stocks more restrictive.

La présente invention a pour but, précisément, d'apporter une solution aux inconvénients rencontrés dans les cas de figures précités, ceci au travers de solutions simples, mettant en oeuvre un équipement standard et, par conséquent, peu onéreux.The object of the present invention is, precisely, to provide a solution to the drawbacks encountered in the above-mentioned cases, this through simple solutions, employing standard equipment and, consequently, inexpensive.

A cet effet, l'invention concerne un dispositif d'entraînement et de mise sous tension d'un élément souple de protection tel qu'une bande, un rideau ou un tablier, comprenant un arbre de commande d'enroulement depuis lequel et sur lequel se déroule et s'enroule ledit élément souple de protection et un arbre de commande de déroulement agissant sur ce dernier, directement ou par l'intermédiaire de moyens de transmission, en vue de son déploiement, l'arbre de commande d'enroulement et l'arbre de commande de déroulement étant chacun entraîné en rotation au moyen d'un moteur auquel sont associés des moyens de freinage activés pour ne plus freiner lorsque l'un de ces moteurs est alimenté, caractérisé par le fait qu'il comporte des moyens de gestion de l'alimentation des moteurs à même d'assurer le fonctionnement, à puissance réduite et en sens inverse de la manoeuvre, du moteur de l'arbre de commande d'enroulement ou de l'arbre de commande de déroulement, selon que l'on est en phase, respectivement, de déroulement ou d'enroulement, en vue de créer un couple résistant à l'égard de cette manoeuvre commandée par le fonctionnement du moteur, respectivement, de l'arbre de commande de déroulement ou de l'arbre de commande d'enroulement.To this end, the invention relates to a device for driving and tensioning a flexible protective element such as a strip, a curtain or an apron, comprising a winding control shaft from which and on which unrolls and winds up said flexible protection element and an unwinding control shaft acting on the latter, directly or by means of transmission, with a view to its deployment, the winding control shaft and l 'unwinding control shaft each being driven in rotation by means of a motor with which associated braking means activated so as to no longer brake when one of these motors is powered, characterized in that it comprises means for management of the power supply of the motors capable of ensuring the operation, at reduced power and in the opposite direction of the operation, of the motor of the winding control shaft or of the unwinding control shaft, depending on whether the 'o n is in phase, respectively, of unwinding or winding, in order to create a resistant torque with respect to this maneuver controlled by the operation of the motor, respectively, of the unwinding control shaft or of the shaft winding control.

L'invention concerne, également, un dispositif d'entraînement et de mise sous tension d'un élément souple de protection, tel qu'une bande, un rideau ou un tablier, comprenant un arbre de commande d'enroulement, depuis lequel et sur lequel se déroule et s'enroule ledit élément souple de protection, et un arbre de commande de déroulement agissant sur ce dernier, directement ou par l'intermédiaire de moyens de transmission, en vue de son déploiement, l'arbre de commande d'enroulement et l'arbre de commande de déroulement étant chacun entraîné en rotation au moyen d'un moteur auquel sont associés des moyens de freinage activés pour ne plus freiner lorsque l'un de ces moteurs est alimenté, caractérisé par le fait qu'il comporte des moyens de gestion de l'alimentation des moteurs à même d'assurer le fonctionnement, à vitesse réduite et dans le même sens que la manoeuvre, du moteur de l'arbre de commande d'enroulement ou de l'arbre de commande de déroulement, selon que l'on est en phase, respectivement, de déroulement ou d'enroulement, en vue de créer un couple résistant à l'égard de cette manoeuvre commandée par le fonctionnement du moteur, de l'arbre de commande de déroulement ou, respectivement, de l'arbre de commande d'enroulement.The invention also relates to a device for driving and tensioning a flexible protective element, such as a strip, a curtain or an apron, comprising a winding control shaft, from which and on which unwinds and winds up said flexible protection element, and an unwinding control shaft acting on the latter, directly or by means of transmission, with a view to its deployment, the winding control shaft and the unwinding control shaft each being driven in rotation by means of a motor with which associated braking means are activated so that they no longer brake when one of these motors is powered, characterized in that it comprises means for managing the supply of the motors capable of ensuring the operation, at reduced speed and in the same direction as the operation, of the motor of the winding control shaft or of the unwinding control shaft, according to e one is in phase, respectively, of unwinding or winding, with a view to creating a resistant torque with respect to this maneuver controlled by the operation of the motor, of the unwinding control shaft or, respectively, of the winding control shaft.

L'invention concerne, enfin, un dispositif d'entraînement et de mise sous tension d'un élément souple de protection, tel qu'une bande, un rideau ou un tablier, comprenant un arbre de commande d'enroulement, depuis lequel et sur lequel se déroule et s'enroule l'élément souple de protection, et un arbre de commande de déroulement agissant sur ce dernier, directement, ou par l'intermédiaire de moyens de transmission, en vue de son déploiement, l'arbre de commande d'enroulement et l'arbre de commande de déroulement étant chacun entraîné en rotation au moyen d'un moteur auquel au moins pour le moteur de l'arbre de commande de déroulement sont associés des moyens de freinage, éventuellement, activés pour ne plus freiner lorsque l'un de ces moteurs est alimenté, caractérisé par le fait qu'il comporte des moyens de gestion de l'alimentation de ces moteurs à même d'assurer au moins en phase d'enroulement, le fonctionnement, d'une part, du moteur de l'arbre de commande d'enroulement à puissance réduite et, d'autre part, du moteur de l'arbre de commande de déroulement à sa puissance nominale et dans le sens de la manoeuvre.Finally, the invention relates to a device for driving and tensioning a flexible protective element, such as a strip, a curtain or an apron, comprising a winding control shaft, from which and on which unwinds and winds up the flexible protection element, and an unwinding control shaft acting on the latter, directly, or by means of transmission, with a view to its deployment, the control shaft d winding and the unwinding control shaft each being driven in rotation by means of a motor to which at least for the motor of the unwinding control shaft are associated braking means, possibly activated to no longer brake when one of these motors is powered, characterized in that it comprises means for managing the power supply of these motors capable of ensuring, at least in the winding phase, the operation, on the one hand, of the drive shaft motor bearing at reduced power and, on the other hand, the motor of the unwinding control shaft at its nominal power and in the direction of the maneuver.

Les avantages obtenus grâce à cette invention consistent, essentiellement, en ce qu'il est possible d'assurer le maintien en tension de l'élément souple de protection, sans faire appel à des moyens de freinage auxiliaires souvent complexes et, par conséquent, onéreux. Par ailleurs, les commandes en déploiement ou enroulement de l'élément souple s'effectuent avec une grande aisance dans la mesure où il n'est pas nécessaire, en cas d'arrêt de commande d'enroulement ou de déroulement de cet élément souple, d'assurer le fonctionnement, momentanément, de tel ou tel moteur pour obtenir la mise en tension, soit de l'élément souple lui-même, soit des sangles qui lui sont associées.The advantages obtained thanks to this invention consist essentially in the fact that it is possible to maintain tension of the flexible protective element, without using often complex auxiliary braking means and, consequently, expensive. Furthermore, the commands for deployment or winding of the flexible element are carried out with great ease insofar as it is not necessary, in the event of a winding control stop or unwinding of this flexible element, to ensure the operation, momentarily, of such or such motor to obtain the tensioning, either of the flexible element itself, or of the straps which are associated with it.

En outre, le maintien de la tension au niveau de l'élément souple, tel qu'un tablier de volet roulant pour fenêtre de toit ou analogue, ceci entre l'arbre de commande d'enroulement et l'arbre de commande de déroulement, résout, en grande partie, les inconvénients rencontrés, à ce niveau et en cas de gel, sur de tels volets roulants. De plus, en gérant, de manière combinée le fonctionnement des moteurs, l'on évite, dans le cadre d'une application à de tels volets roulants, l'usage d'un moteur surpuissant pour assurer l'enroulement du tablier sur l'arbre de commande d'enroulement, celui-ci étant susceptible d'être assisté, lors de cette manoeuvre, par l'intermédiaire du moteur de l'arbre de commande de déroulement. Ceci permet d'apporter une solution au problème de rupture du tablier provoquée, habituellement, par de tels moteurs surpuissants.In addition, maintaining the tension at the level of the flexible element, such as a roller shutter curtain for a roof window or the like, this between the winding control shaft and the unwinding control shaft, largely resolves the drawbacks encountered, at this level and in the event of frost, on such roller shutters. In addition, by managing, in a combined manner, the operation of the motors, one avoids, within the framework of an application to such roller shutters, the use of an overpowered motor to ensure the winding of the deck on the winding control shaft, the latter being capable of being assisted, during this maneuver, by means of the motor of the unwinding control shaft. This makes it possible to provide a solution to the problem of breakage of the bulkhead caused, usually, by such overpowered motors.

Finalement, en soulageant les efforts produits par le moteur de l'arbre de commande d'enroulement en raison de l'assistance produite par le moteur de l'arbre de commande de déroulement, l'on s'aperçoit qu'il est également envisageable d'aller vers une standardisation de ces moteurs. D'ailleurs, pour des raisons de coût de fabrication, ceux-ci étant moindres dans le cadre d'une production en grande série, les moteurs sont choisis, préférentiellement, de caractéristiques identiques.Finally, by relieving the stresses produced by the motor of the winding control shaft due to the assistance produced by the motor of the winding control shaft, we realize that it is also possible. to move towards standardization of these engines. Moreover, for reasons of manufacturing cost, these being lower in the context of mass production, the motors are preferably chosen with identical characteristics.

L'invention est exposée plus en détail dans la description qui va suivre se rapportant aux dessins joints en annexe et illustrant un mode de réalisation.

  • la figure 1 représente une vue schématisée et en perspective d'un dispositif d'entraînement et de mise sous tension d'un élément souple de protection du type bande ou rideau venant à se déployer quasi horizontalement ;
  • la figure 2 représente une vue schématisée et en perspective d'un dispositif d'entraînement et de mise sous tension d'un élément souple de protection sous forme d'un tablier de volet roulant, applicable, par exemple, à des fenêtres de toits ou analogues.
The invention is set out in more detail in the description which follows, referring to the appended drawings and illustrating an embodiment.
  • FIG. 1 represents a schematic perspective view of a drive and tensioning device for a flexible element of protection of the strip or curtain type which deploys almost horizontally;
  • FIG. 2 represents a schematic perspective view of a drive and tensioning device for a flexible protection element in the form of a roller shutter curtain, applicable, for example, to roof windows or analogues.

Telle que représentée dans les figures du dessin en annexe, la présente invention est relative à un dispositif d'entraînement et de mise sous tension 1 pour élément souple de protection 2 enroulable du type bande ou rideau 3, tel que représenté dans la figure 1, ou encore du type tablier 4 pour volet roulant, tel qu'illustré dans la figure 2.As shown in the figures in the appended drawing, the present invention relates to a drive and tensioning device 1 for flexible protective element 2 which can be wound up of the strip or curtain type 3, as shown in FIG. 1, or again of the apron type 4 for rolling shutter, as illustrated in FIG. 2.

En fait, ce dispositif d'entraînement et de mise sous tension 1 a pour but d'assurer le déploiement à l'horizontale ou avec une faible inclinaison, de cet élément souple de protection 2. Aussi, il comporte, tout d'abord, un arbre de commande d'enroulement 5 duquel et sur lequel se déroule et s'enroule l'élément souple de protection 2. Il comporte, par ailleurs, un arbre de commande de déroulement 6 agissant sur cet élément souple de protection 2, soit directement tel que représenté dans la figure 2, ou par l'intermédiaire de moyens de transmission 7, notamment des sangles, correspondant au mode de réalisation de la figure 1, ceci en vue d'obtenir son déploiement.In fact, this drive and tensioning device 1 aims to ensure the deployment horizontally or with a slight inclination, of this flexible protective element 2. Also, it comprises, first of all, a winding control shaft 5 from which and on which the flexible protective element 2 is unwound and wound up. It further comprises a unwinding control shaft 6 acting on this flexible protective element 2, either directly as shown in Figure 2, or via transmission means 7, in particular straps, corresponding to the embodiment of Figure 1, this in order to obtain its deployment.

Si l'on se reporte, plus particulièrement, au mode de réalisation représenté dans la figure 1 et illustrant un dispositif d'entraînement et de mise sous tension pour élément souple de protection 2 du type bande ou rideau 3, l'arbre de commande de déroulement 6 est disposé parallèlement à l'arbre de commande d'enroulement 5 et se situe, par rapport à ce dernier, de l'autre côté de la surface 8 à recouvrir et à protéger. Sur cet arbre de commande de déroulement 6 sont montés des tambours 9, 10, sur lesquels s'enroulent les sangles constituant les moyens de transmission 7 et reliés à l'extrémité libre 11 de l'élément souple de protection 2.If one refers, more particularly, to the embodiment represented in FIG. 1 and illustrating a drive and tensioning device for flexible protective element 2 of the strip or curtain type 3, the control shaft of unwinding 6 is arranged parallel to the winding control shaft 5 and is located, with respect to the latter, on the other side of the surface 8 to be covered and to be protected. On this unwinding control shaft 6 are mounted drums 9, 10, on which are wound the straps constituting the transmission means 7 and connected to the free end 11 of the flexible protective element 2.

L'arbre de commande d'enroulement 5 et l'arbre de commande de déroulement 6 sont chacun entraîné en rotation au moyen d'un moteur, respectivement 12, 13, qui, tel que représenté, peut être du type tubulaire ou encore placé en bout d'arbre. A chacun de ces moteurs 12, 13, sont associés des moyens de freinage 14, 15, constitués, par exemple, par un frein du type électromagnétique. Ce frein 14, 15 est activé, c'est-à-dire qu'il ne freine plus, lorsque l'un quelconque des moteurs 12, 13 est alimenté. Ainsi, en cas d'arrêt de fonctionnement de ces moteurs 12, 13, les freins 14, 15 sont désactivés de sorte que l'arbre de commande d'enroulement 5, respectivement, l'arbre de commande de déroulement 6 est bloqué en rotation.The winding control shaft 5 and the unwinding control shaft 6 are each driven in rotation by means of a motor, respectively 12, 13, which, as shown, may be of the type tubular or placed at the end of the shaft. Each of these motors 12, 13 is associated with braking means 14, 15, constituted, for example, by a brake of the electromagnetic type. This brake 14, 15 is activated, that is to say that it no longer brakes when any of the motors 12, 13 is supplied. Thus, in the event of stop of operation of these motors 12, 13, the brakes 14, 15 are deactivated so that the winding control shaft 5, respectively, the unwinding control shaft 6 is locked in rotation .

Selon une caractéristique de l'invention, le dispositif d'entraînement et de mise sous tension 1, dans le cadre du mode de réalisation illustré dans la figure 1, comporte des moyens de gestion 16 de l'alimentation des moteurs 12, 13 à même d'assurer le fonctionnement, à puissance réduite et en sens inverse de la manoeuvre en cours d'exécution, du moteur 12, 13, de l'arbre de commande d'entraînement 5 ou de l'arbre de commande de déroulement 6, selon que l'on est en phase, respectivement, de déploiement ou d'enroulement de l'élément souple 2. Ainsi, à titre d'exemple, en phase de déploiement, non seulement le moteur 13 est alimenté de manière à entraîner en rotation l'arbre de commande de déroulement 6 provoquant l'enroulement des moyens de transmission 7 sur les tambours 9, 10, mais, également, le moteur 12 de l'arbre de commande d'enroulement 5, mais à puissance réduite et en sens inverse par rapport à la manoeuvre en cours, c'est-à-dire le déploiement de l'élément souple 2. Ainsi, ce moteur 12, fonctionnant à l'inverse, produit un couple résistant à l'égard de la manoeuvre commandée par le fonctionnement du moteur 13 de l'arbre de commande de déroulement 6. Cette situation est la même, mais à l'inverse, en phase de repliement de l'élément souple 2. Dans ce cas, le moteur 12 de l'arbre de commande d'enroulement 5 est normalement alimenté, tandis que le moteur 13 de l'arbre de commande de déroulement 6 est alimenté avec une puissance réduite et, fonctionne à l'inverse de la manoeuvre pour produire un couple résistant.According to a characteristic of the invention, the drive and energizing device 1, within the framework of the embodiment illustrated in FIG. 1, comprises means 16 for managing the power supply to the motors 12, 13 in the same ensure the operation, at reduced power and in the opposite direction of the maneuver during execution, of the motor 12, 13, of the drive control shaft 5 or of the unwinding control shaft 6, according to that one is in phase, respectively, of deployment or winding of the flexible element 2. Thus, for example, in deployment phase, not only the motor 13 is supplied so as to drive in rotation l unwinding control shaft 6 causing the transmission means 7 to be wound on the drums 9, 10, but also the motor 12 of the winding control shaft 5, but at reduced power and in the opposite direction by in relation to the maneuver in progress, i.e. the deployment of the flexible element 2. Thus, this motor 12, operating in reverse, produces a resistant torque with respect to the operation controlled by the operation of the motor 13 of the unwinding control shaft 6. This situation is the same, but conversely, during the folding phase of the flexible element 2. In this case, the motor 12 of the winding control shaft 5 is normally supplied, while the motor 13 of the control shaft unwinding 6 is supplied with reduced power and operates in reverse of the operation to produce a resistant torque.

Ce couple résistant peut également être obtenu en assurant le fonctionnement du moteur 12, 13 dans le même sens que la manoeuvre en cours d'exécution, mais à vitesse plus réduite par rapport à celle du moteur respectivement 13, 12, selon que l'on est, respectivement, en cours de déploiement ou de repliement de l'élément souple 2.This resistant torque can also be obtained by ensuring the operation of the motor 12, 13 in the same direction as the maneuver being executed, but at a lower speed compared to that of the motor respectively 13, 12, depending on whether one is, respectively, during deployment or folding of the flexible element 2.

L'on remarquera que dans le cadre de ce dernier mode de réalisation préconisé selon l'invention, la puissance des moteurs 12, 13 peut être plus réduite, puisque ces derniers s'assistent, mutuellement, au cours des différentes manoeuvres.It will be noted that in the context of this latter embodiment recommended according to the invention, the power of the motors 12, 13 may be reduced, since the latter assist each other during the various maneuvers.

Dans tous les cas, que ce soit sous l'influence d'une alimentation des moteurs à puissance réduite tentant à les faire tourner à l'inverse de la manoeuvre en cours d'exécution ou d'une vitesse de rotation plus faible de l'un de ces moteurs 12, 13 par rapport à l'autre moteur, respectivement, 13, 12 selon que l'on est en phase, respectivement, de déploiement ou de repliement, le couple résistant ainsi produit, au niveau de l'arbre de commande d'enroulement 5 ou de l'arbre de commande de déroulement 6, garantit le maintien en tension de l'élément souple 2, tant pendant les manoeuvres qu'au moment de l'arrêt de fonctionnement de ces moteurs 12, 13.In all cases, whether under the influence of a power supply to the motors at reduced power attempting to rotate them contrary to the maneuver being executed or a lower speed of rotation of the one of these motors 12, 13 relative to the other motor, respectively, 13, 12 depending on whether one is in phase, respectively, of deployment or folding, the resistive torque thus produced, at the level of the shaft of winding control 5 or the unwinding control shaft 6, ensures that the flexible element 2 is kept in tension, both during the maneuvers and at the time when these motors 12, 13 stop operating.

Par conséquent, l'on observe qu'au travers de simples moyens de gestion de fonctionnement de ces moteurs 12, 13 et, donc sans frein auxiliaire ou analogue, il est possible de garantir un parfait maintien en tension d'un élément souple 2 tant en cours de manoeuvre qu'après.Consequently, it is observed that through simple means of managing the operation of these motors 12, 13 and, therefore without an auxiliary brake or the like, it is possible to guarantee perfect maintenance in tension of a flexible element 2 both during the maneuver until after.

Dans le cadre d'une application plus particulière à un élément souple 2 du type tablier 4 de volet roulant, l'on observe que l'arbre de commande de déroulement 6 se situe parallèlement et sensiblement en aval de l'arbre de commande d'enroulement 5 duquel et sur lequel s'enroule ledit tablier 4. A noter que celui-ci est conçu par une juxtaposition de lames 17 associées les unes aux autres au moyen d'articulations, souvent de nature télescopique.In the context of a more specific application to a flexible element 2 of the roller shutter type apron 4, it is observed that the unwinding control shaft 6 is located parallel and substantially downstream of the control shaft winding 5 from which and on which said apron 4 is wound. Note that this is designed by a juxtaposition of blades 17 associated with each other by means of articulations, often of a telescopic nature.

A noter qu'en cours de déploiement les extrémités de ces lames 17 et, par conséquent, les bords latéraux 18, 19 du tablier 4 se déplacent dans des rails de guidage 20, 21.It should be noted that during deployment the ends of these blades 17 and, consequently, the lateral edges 18, 19 of the deck 4 move in guide rails 20, 21.

Dans ce cas précis, l'arbre de commande de déroulement 6, étant disposé en aval de l'arbre de commande d'enroulement, agit, directement, sur les lames 17 du tablier 4 composant l'élément souple 2. En fait, cet arbre de commande de déroulement 6 comporte, à ses extrémités, des moyens d'entraînement 22 sous forme de roues dentées 23 coopérant avec les lames 17 en venant s'engréner dans des ouvertures 24 pratiquées à hauteur des extrémités de ces dernières.In this specific case, the unwinding control shaft 6, being arranged downstream of the winding control shaft, acts directly on the blades 17 of the deck 4 making up the flexible element 2. In fact, this unwinding control shaft 6 comprises, at its ends, drive means 22 in the form of toothed wheels 23 cooperating with the blades 17 coming to mesh in openings 24 made at the ends of the latter.

Là encore, de manière à conserver une certaine tension entre les lames 17 lorsque celles-ci entrent dans la zone séparant l'arbre de commande d'enroulement 5 et l'arbre de commande de déroulement 6, des moyens de gestion 16 de l'alimentation des moteurs 12, 13 associés, respectivement, à cet arbre de commande d'enroulement 5 et à l'arbre de commande de déroulement 6, peuvent garantir l'alimentation à puissance réduite et en sens inverse de l'un de ces moteurs 12, 13 en vue de créer un couple résistant s'opposant à la manoeuvre en cours, respectivement, au déploiement et au repliement de l'élément souple 2.Again, so as to maintain a certain tension between the blades 17 when these enter the zone separating the winding control shaft 5 and the unwinding control shaft 6, management means 16 of the supply of motors 12, 13 associated, respectively, with this winding control shaft 5 and with the unwinding control shaft 6, can guarantee the supply at reduced power and in the opposite direction of one of these motors 12 , 13 with a view to creating a resistant torque opposing the maneuver in progress, respectively, the deployment and the folding of the flexible element 2.

Ainsi, à titre d'exemple, en cours de repliement de cet élément souple 2, le moteur 12 de l'arbre de commande d'enroulement 5 est convenablement alimenté, tandis que le moteur 13 de l'arbre de commande de déroulement 6 est alimenté avec une puissance réduite et selon un sens de rotation inverse de manière à produire un couple résistant vis-à-vis de la manoeuvre de repliement de l'élément souple 2.Thus, by way of example, during the folding of this flexible element 2, the motor 12 of the winding control shaft 5 is suitably supplied, while the motor 13 of the unwinding control shaft 6 is supplied with a reduced power and in a reverse direction of rotation so as to produce a resisting torque with respect to the folding element's maneuver of the flexible element 2.

Toutefois, l'on observe que dans le cadre d'une telle gestion de fonctionnement des moteurs 12, 13 et, notamment, en cours de repliement de l'élément souple 2, le moteur 12, associé à l'arbre de commande d'enroulement 5, doit disposer d'une puissance non seulement suffisante pour faire face au poids total du tablier 4, mais, en outre, pour pallier au couple résistant produit par le moteur 13 de l'arbre de commande de déroulement 6.However, it is observed that in the context of such an operation management of the motors 12, 13 and, in particular, during the folding of the flexible element 2, the motor 12, associated with the control shaft of winding 5, must have a power not only sufficient to cope with the total weight of the deck 4, but also to compensate for the resistant torque produced by the motor 13 of the unwinding control shaft 6.

Aussi et selon l'invention, il est préconisé, plus particulièrement dans le cadre d'une telle application à un volet roulant et en phase d'enroulement du tablier, d'assurer, par l'intermédiaire des moyens de gestion 16, le fonctionnement du moteur 13 dans le même sens que la manoeuvre en cours mais à vitesse réduite en comparaison du moteur 12 agissant sur l'arbre de commande d'enroulement 5. Il est évident, dans ces conditions, que le moteur 13 fonctionnant à vitesse réduite gère la vitesse de déplacement du tablier 4 et provoque une tension au niveau du tablier 4, tout particulièrement dans la zone séparant l'arbre de commande de déroulement 6 et l'arbre de commande d'enroulement 5. De ce fait, les lames 17 composant le tablier 4 sont maintenues, sans cesse, écartées les unes des autres de manière à libérer leur articulation.Also and according to the invention, it is recommended, more particularly in the context of such an application to a roller shutter and in the winding phase of the deck, to ensure, by means of management means 16, the operation of the motor 13 in the same direction as the maneuver in progress but at reduced speed in comparison with the motor 12 acting on the winding control shaft 5. It is obvious, under these conditions, that the motor 13 operating at reduced speed manages the speed of movement of the deck 4 and causes tension at the deck 4, especially in the area separating the unwinding control shaft 6 and the winding control shaft 5. From this fact, the blades 17 composing the apron 4 are kept, unceasingly, separated from each other so as to release their articulation.

En fait, cette solution de faire fonctionner les moteurs 12, 13 dans un même sens, lors d'une manoeuvre de déploiement ou, plus particulièrement, de repliement du tablier 4, a pour avantage que ces moteurs 12, 13 s'assistent, mutuellement, lors de ces différentes manoeuvres. Cela revient à dire que pour des moteurs d'une puissance donnée, l'on est en mesure de déployer ou d'enrouler un tablier 4 plus grand et plus lourd comparativement à une situation antérieure. En définitive, cela revient à dire que des moteurs d'une puissance donnée sont en mesure de satisfaire à une plus large gamme de volets roulants. Finalement, cette standardisation des moteurs contribue, de manière importante, à une réduction du coût de revient d'un tel volet roulant.In fact, this solution of operating the motors 12, 13 in the same direction, during a deployment maneuver or, more particularly, of folding the apron 4, has the advantage that these motors 12, 13 assist each other , during these different maneuvers. This amounts to saying that for motors of a given power, one is able to deploy or wind up a larger and heavier deck 4 compared to a previous situation. Ultimately, this amounts to saying that motors of a given power are able to satisfy a wider range of roller shutters. Finally, this standardization of motors contributes significantly to a reduction in the cost price of such a rolling shutter.

Il convient, toutefois, d'observer que des moyens de gestion électriques ou électroniques de la vitesse de rotation de moteurs, par exemple, de moteurs asynchrones souvent utilisés dans ce domaine, sont d'un coût de revient non négligeable. En définitive, il est plus économique d'adopter des moyens de gestion d'alimentation des moteurs sous forme de régulateur de puissance. Aussi, en vue d'obtenir le résultat recherché, à savoir le maintien en tension du tronçon de tablier 4 séparant l'arbre de commande d'enroulement 5 et l'arbre de commande de déroulement 6, l'on a envisagé, selon l'invention, l'usage de moyens de gestion 16 de l'alimentation des moteurs 12, 13 à même d'assurer, au moins en phase d'enroulement, le fonctionnement, d'une part, du moteur 12 de l'arbre de commande d'enroulement 5 à puissance réduite et, d'autre part, du moteur 13 de l'arbre de commande de déroulement 6 à puissance nominale et dans le sens de la manoeuvre, c'est-à-dire dans le sens de l'enroulement du tablier 4.It should, however, be observed that means of electrical or electronic management of the rotation speed of motors, for example, asynchronous motors often used in this field, are of non-negligible cost. Ultimately, it is more economical to adopt engine power management means in the form of a power regulator. Also, in order to obtain the desired result, namely the maintenance in tension of the section of deck 4 separating the winding control shaft 5 and the unwinding control shaft 6, it has been envisaged, according to l invention, the use of means 16 for powering the motors 12, 13 capable of ensuring, at least in the winding phase, the operation, on the one hand, of the motor 12 of the shaft winding control 5 at reduced power and, on the other hand, of the motor 13 of the unwinding control shaft 6 at nominal power and in the direction of the maneuver, that is to say in the direction of the winding the deck 4.

Il est cependant souhaitable de s'assurer, dans ces conditions, que la vitesse linéaire théorique conférée par l'arbre de commande d'enroulement 5 au tablier 4 soit, de manière systématique, supérieure à la vitesse linéaire réelle communiquée à ce tablier 4 par l'intermédiaire de l'arbre de commande de déroulement 6. En fait, en utilisant des moteurs 12, 13 de caractéristiques identiques, le problème ne se pose, en réalité, que durant la phase initiale de l'enroulement du tablier 4 sur l'arbre de commande d'enroulement 5. En effet, durant cette phase, il faut s'assurer que les lames 17 composant le tablier 4 soient maintenues écartées les unes des autres, de sorte que leur articulation respective soit libérée et qu'il leur soit possible de se replier autour de l'arbre de commande d'enroulement 5 en venant s'appliquer contre ce dernier. Par conséquent, en s'assurant que la vitesse linéaire théorique susceptible d'être communiquée au tablier 4 par l'arbre de commande d'enroulement 5 dès la phase initiale de cet enroulement, soit supérieure à la vitesse linéaire à même d'être transmise au tablier 4 par l'intermédiaire de l'arbre de commande de déroulement 6, on est certain qu'il s'exerce constamment une tension sur le tablier 4 entre cet arbre de commande d'enroulement 5 et l'arbre de commande de déroulement 6, tension conduisant à l'écartement des lames 17 entre elles. Il est évident que cette vitesse linéaire théorique communiquée au tablier 4 par l'intermédiaire de l'arbre de commande d'enroulement 5 augmente, progressivement, au fur-et-à-mesure que le tablier forme des spires autour de cet arbre de commande d'enroulement 5.It is however desirable to ensure, under these conditions, that the theoretical linear speed imparted by the winding control shaft 5 to the deck 4 is, systematically, greater than the actual linear speed communicated to this deck 4 by through the unwinding control shaft 6. In fact, using motors 12, 13 of identical characteristics, the problem does not arise, in reality, until the initial phase of winding the deck 4 on the tree winding control 5. In fact, during this phase, it is necessary to ensure that the blades 17 making up the deck 4 are kept apart from each other, so that their respective articulation is released and that it is possible for them to fall back around the winding control shaft 5 by pressing against it. Consequently, by ensuring that the theoretical linear speed capable of being communicated to the deck 4 by the winding control shaft 5 from the initial phase of this winding, is greater than the linear speed capable of being transmitted to the apron 4 by means of the unwinding control shaft 6, it is certain that there is constantly tension on the apron 4 between this winding control shaft 5 and the unwinding control shaft 6, tension leading to the spacing of the blades 17 between them. It is obvious that this theoretical linear speed communicated to the deck 4 by means of the winding control shaft 5 increases, gradually, as the deck forms turns around this control shaft winding 5.

En vue d'obtenir le résultat ci-dessus, l'on peut naturellement choisir d'adapter la vitesse de rotation du moteur 13 par l'intermédiaire des moyens de gestion 16 tout en assurant, au travers de ces derniers, le fonctionnement à puissance réduite du moteur 12 associé à l'arbre de commande d'enroulement 5. Cependant, cette solution a pour inconvénient, là encore, de compliquer la configuration des moyens de gestion 16 et, par conséquent, de rendre ceux-ci particulièrement onéreux. En fait, une solution avantageuse consiste à choisir un diamètre d'arbre de commande d'enroulement 5 suffisant, c'est-à-dire qui permette, dès la phase initiale d'enroulement, d'assurer, sous l'influence de la rotation du moteur 12, une vitesse linéaire théorique au tablier 4 qui soit supérieure par rapport à la vitesse linéaire réelle transmise à ce tablier 4 par l'intermédiaire de l'arbre de commande de déroulement 6 et donc du moteur 13. Plus précisément, le diamètre de l'arbre de commande d'enroulement 5 sera choisi supérieur au diamètre nominal des roues dentées 23 équipant, à ses extrémités, l'arbre de commande de déroulement 6 et venant s'engréner dans les ouvertures 24 présentes dans le tablier 4.In order to obtain the above result, one can naturally choose to adapt the speed of rotation of the motor 13 by means of the management means 16 while ensuring, through the latter, operation at power reduced motor 12 associated with the winding control shaft 5. However, this solution has the disadvantage, here again, of complicating the configuration of the management means 16 and, consequently, making them particularly expensive. In fact, an advantageous solution consists in choosing a sufficient winding control shaft diameter 5, that is to say which allows, from the initial winding phase, to ensure, under the influence of the rotation of the motor 12, a theoretical linear speed to the bulkhead 4 which is greater than the actual linear speed transmitted to this bulkhead 4 via the unwinding control shaft 6 and therefore of the motor 13. More precisely, the diameter of the winding control shaft 5 will be chosen to be greater than the nominal diameter of the toothed wheels 23 equipping, at its ends, the unwinding control shaft 6 and coming to mesh in the openings 24 present in the deck 4.

Il convient de préciser que dans le cadre d'une telle application à un volet roulant, les moyens de freinage 14, 15 associés au moteur 12, 13 peuvent être constitués, tout comme dans le cadre du mode de réalisation précédent, par un frein électromagnétique directement couplé à chacun de ses moteurs 12, 13. Toutefois, en raison de la faible distance séparant l'arbre de commande d'enroulement 5 et l'arbre de commande de déroulement 6, il suffit, en réalité, d'associer uniquement au moteur 13 de l'arbre de commande de déroulement 6 un tel frein électromagnétique ceci, principalement, pour garantir le blocage du tablier 4 dans n'importe quelle position et qu'il ne se déplie pas automatiquement par son propre poids. En effet, des moyens de freinage dépendant directement de la configuration du moteur 13 et des moyens d'entraînement qui lui sont associés, du type réducteur de vitesse, sont, dans ce cas, suffisants pour maintenir en tension les lames du tronçon de tablier séparant l'arbre de commande d'enroulement 5 et l'arbre de commande de déroulement 6 après arrêt du fonctionnement des moteurs 12, 13.It should be noted that in the context of such an application to a rolling shutter, the braking means 14, 15 associated with the motor 12, 13 can be constituted, just as in the context of the previous embodiment, by an electromagnetic brake directly coupled to each of its motors 12, 13. However, due to the short distance separating the winding control shaft 5 and the unwinding control shaft 6, it suffices, in reality, to associate only with the motor 13 of the unwinding control shaft 6 such an electromagnetic brake this, mainly, to guarantee the locking of the deck 4 in any position and that it does not automatically unfold by its own weight. In fact, braking means directly dependent on the configuration of the motor 13 and the drive means associated therewith, of the speed reducer type, are, in this case, sufficient to keep the blades of the section of apron separating in tension the winding control shaft 5 and the unwinding control shaft 6 after the engines 12, 13 have stopped operating.

En conclusion, tel que cela apparaît dans la description qui précède, la présente invention, non seulement, apporte, une solution à un problème technique réel en matière de déploiement d'élément souple de protection à l'horizontale ou à faible inclinaison, mais, en outre, de par sa simplicité, s'avère d'un coût de revient plus réduit et autorise une certaine standardisation au niveau de la fabrication. De ce fait, la présente invention représente un net progrès technique dans le domaine concerné.In conclusion, as it appears in the foregoing description, the present invention not only provides a solution to a real technical problem in the deployment of flexible protective elements horizontally or at low inclination, but, moreover, by virtue of its simplicity, turns out to be a lower cost price and allows a certain standardization at the manufacturing level. Therefore, the present invention represents a clear technical progress in the field concerned.

Claims (8)

  1. Device for driving and putting under tension (1) of a flexible protection element (2), such as a web (3), a curtain or an apron (4), comprising a rolling-up-control shaft (5), from which and on which unrolls and rolls up said flexible protection element (2), and an unrolling-control shaft (6) acting on this latter, either directly or through transmission means (7), with a view to its unfolding, the rolling-up-control shaft (5) and the unrolling-control shaft (6) being driven in rotation each by means of a motor (12, 13) to which are associated braking means (14, 15) activated to stop braking when either motor (12, 13) is fed with power, characterized in that it includes means (16) for controlling the current supply to the motors (12, 13) capable of ensuring the operation, at reduced power and in opposite direction to the manoeuvre, of the motor (12) or (13), respectively, of the rolling-up-control shaft (5) or the unrolling-control shaft (6), respectively, according to whether one is in the unrolling or in the rolling-up phase, with a view to bring about a torque opposing this manoeuvre controlled by the operation of the motor (13, 12) of the unrolling-control shaft (6) or the rolling-up-control shaft (5), respectively.
  2. Device for driving and putting under tension (1) of a flexible protection element (2), such as a web (3), a curtain or an apron (4), comprising a rolling-up-control shaft (5), from which and on which unrolls and rolls up said flexible protection element (2), and an unrolling-control shaft (6) acting on this latter, either directly or through transmission means (7), with a view to its unfolding, the rolling-up-control shaft (5) and the unrolling-control shaft (6) being driven in rotation each by means of a motor (12, 13) to which are associated braking means (14, 15) activated to stop braking when either motor (12, 13) is fed with power, characterized in that it includes means (16) for controlling the current supply to the motors (12, 13) capable of ensuring the operation, at reduced power and in the same direction as the manoeuvre, of the motor (12) or (13), respectively, of the rolling-up-control shaft (5) or the unrolling-control shaft (6), respectively, according to whether one is in the unrolling or in the rolling-up phase, with a view to bring about a torque opposing this manoeuvre controlled by the operation of the motor (13) or (12), respectively, of the unrolling-control shaft (6) or the rolling-up-control shaft (5), respectively.
  3. Device for driving and putting under tension of a flexible protection element (2), such as a web (3), a curtain or an apron (4), comprising a rolling-up-control shaft (5), from which and on which unrolls and rolls up said flexible protection element (2), and an unrolling-control shaft (6) acting on this latter, either directly or through transmission means (7), with a view to its unfolding, the rolling-up-control shaft (5) and the unrolling-control shaft (6) being driven in rotation each by means of a motor (12, 13) to which, at least as regards the motor of the unrolling-control shaft, are associated braking means (14, 15) activated to stop braking when either motor (12, 13) is fed with power, characterized in that it includes means (16) for controlling the current supply to the motors (12, 13) capable of ensuring, at least during the rolling-up phase, the operation, on the one hand, of the motor (12) of the rolling-up-control shaft (5) at reduced power and, on the other hand, of the motor (13) of the unrolling-control shaft (6) at rated power and in the direction of the manoeuvre.
  4. Device for driving and putting under tension according to any of claims 1 and 2, characterized in that it is applied to a flexible protection element (2) such as a web (3) with a horizontal or slightly inclined movement rolling-up on and unrolling from the rolling-up-control shaft (5), the unrolling-control shaft (6) being arranged parallelly to the rolling-up-control shaft (5) and including drums (9, 10) on which are capable of rolling up belts forming the transmission means (7) connected to the free end (11) of the flexible protection element (2) in the shape of a web (3).
  5. Device for driving and putting under tension (1) according to any of claims 1 through 3, characterized in that it is applied to a flexible protection element (2) in the shape of an apron (4) of a roller blind, said apron (4) being comprised of a series of slats (17) connected to each other and including openings (24) capable of cooperating with driving means (22) associated to the unrolling-control shaft (6) arranged parallelly and downstream to the rolling-up-control shaft (5) from which and on which unrolls and rolls up said apron (4).
  6. Device for driving and putting under tension (1) according to claim 3, characterized in that it is applied to a flexible protection element (2) in the shape of an apron (4) of a roller blind, said apron (4) being comprised of a series of slats (17) connected to each other and including openings (24) capable of cooperating with driving means (22) associated to the rolling-up-control shaft (6) arranged parallelly and downstream to the rolling-up-control shaft (5), said driving device including, in combination, means for ensuring, right from the initial phase of rolling-up of the apron (4), a theoretical linear speed of this latter, at the level of this rolling-up-control shaft (5), higher than the actual linear speed which is imparted to same by the unrolling-control shaft (6).
  7. Device for driving and putting under tension according to claim 6, characterized in that said means are formed by the control means (16) capable of influencing the rotation speed of the motor (13) associated to the unrolling-control shaft (6).
  8. Device for driving and putting under tension according to claim 6, characterized in that said means are formed by a diameter of the rolling-up shaft (5) sufficient to achieve, under the influence of the rotation of the motor (13) operating at reduced power, a theoretical linear speed of the apron (4) higher than the linear speed imparted to this apron (4) by the unrolling-control shaft (6) during the rotation of the motor (13) at rated speed and this during the initial phase of rolling-up.
EP94440061A 1993-09-29 1994-09-23 Device for driving or putting under tension of a supple protection element such as a web, a curtain, or an apron Expired - Lifetime EP0645518B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311767 1993-09-29
FR9311767A FR2710685B1 (en) 1993-09-29 1993-09-29 Device for driving and tensioning a flexible protective element, such as a strip, a curtain or an apron.

Publications (2)

Publication Number Publication Date
EP0645518A1 EP0645518A1 (en) 1995-03-29
EP0645518B1 true EP0645518B1 (en) 1997-01-08

Family

ID=9451493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94440061A Expired - Lifetime EP0645518B1 (en) 1993-09-29 1994-09-23 Device for driving or putting under tension of a supple protection element such as a web, a curtain, or an apron

Country Status (6)

Country Link
US (1) US5547009A (en)
EP (1) EP0645518B1 (en)
AT (1) ATE147475T1 (en)
DE (1) DE69401410T2 (en)
ES (1) ES2098113T3 (en)
FR (1) FR2710685B1 (en)

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US6684930B2 (en) 2001-12-14 2004-02-03 Newell Window Furnishings, Inc. Brake for a cordless blind
US6675861B2 (en) 2001-12-14 2004-01-13 Newell Window Furnishings, Inc. Brake for a cordless blind
US7096917B2 (en) * 2001-12-14 2006-08-29 Newell Window Furnishings, Inc. One way brake for a cordless blind
US7389863B2 (en) * 2006-01-27 2008-06-24 Warner Electric Technology, Llc Automatically releaseable bidirectional overrunning clutch
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US7387344B2 (en) * 2005-12-09 2008-06-17 Yu Xiaohui Echo Easy assembly sofa kit
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BR112014007887B1 (en) 2011-10-03 2021-02-09 Hunter Douglas Inc. roof control device for architectural opening
CA2828819C (en) 2012-10-03 2020-03-10 Hunter Douglas Inc. Methods and apparatus to control an architectural opening covering assembly
CN109594905B (en) 2013-03-14 2021-06-08 亨特道格拉斯公司 Method and apparatus for controlling an architectural opening covering assembly
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EP4148227A1 (en) 2021-09-10 2023-03-15 Bhg Method for controlling a device for driving a flexible protective element and device for driving such a flexible protective element
FR3127011A1 (en) 2021-09-10 2023-03-17 Bhg Method for controlling a device for driving a flexible protection element and device for driving such a flexible protection element.
FR3127010A1 (en) 2021-09-10 2023-03-17 Bhg Method for controlling a device for driving a flexible protection element and device for driving such a flexible protection element.

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Also Published As

Publication number Publication date
US5547009A (en) 1996-08-20
EP0645518A1 (en) 1995-03-29
FR2710685B1 (en) 1995-12-22
DE69401410D1 (en) 1997-02-20
ES2098113T3 (en) 1997-04-16
DE69401410T2 (en) 1997-06-19
FR2710685A1 (en) 1995-04-07
ATE147475T1 (en) 1997-01-15

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