EP0775799A1 - Safety device for roller shutter - Google Patents

Safety device for roller shutter Download PDF

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Publication number
EP0775799A1
EP0775799A1 EP96420337A EP96420337A EP0775799A1 EP 0775799 A1 EP0775799 A1 EP 0775799A1 EP 96420337 A EP96420337 A EP 96420337A EP 96420337 A EP96420337 A EP 96420337A EP 0775799 A1 EP0775799 A1 EP 0775799A1
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EP
European Patent Office
Prior art keywords
shaft
safety device
spring
actuator
shutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96420337A
Other languages
German (de)
French (fr)
Inventor
Christophe Comte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Simu SAS
Original Assignee
Simu SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Simu SAS filed Critical Simu SAS
Publication of EP0775799A1 publication Critical patent/EP0775799A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/10—Counterbalance devices
    • E05D13/12—Counterbalance devices with springs
    • E05D13/1253—Counterbalance devices with springs with canted-coil torsion springs
    • E05D13/1269—Spring safety devices
    • 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
    • E06B9/60—Spring drums operated only by closure members
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/84—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against dropping
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/10—Counterbalance devices
    • E05D13/12—Counterbalance devices with springs
    • E05D13/1253—Counterbalance devices with springs with canted-coil torsion springs
    • E05D13/1261—Counterbalance devices with springs with canted-coil torsion springs specially adapted for overhead wings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/106—Application of doors, windows, wings or fittings thereof for buildings or parts thereof for garages

Definitions

  • a roller shutter generally comprises several compensating springs which are arranged in parallel, each in a housing, and act on the winding axis to balance the weight of the deck.
  • the roller shutter is driven either manually or for example by an electric motor which includes a brake, this brake acting by lack of current.
  • This brake prevents the winding drum from rotating around its axis in the absence of electrical power.
  • the capacities of the electric motor of the brake and of the drive structure are calculated to be sufficient even in the event of failure of one or more compensating springs.
  • the compensating springs fulfill their function, the shutter is subjected to forces much lower than those that the structure can support, and there is no risk of failure, in particular no risk of rupture of the transmission, this rupture can be the cause of a sudden fall of the curtain.
  • the invention finally relates to a rolling shutter comprising a safety device as previously described.
  • the shutter of fig. 1 comprises a fixed shaft 1, forming the axis of rotation of a drum 2 on which the apron 3 of the shutter can be wound.
  • the drum 2 is rotated by an electric motor 4 mounted on a flange 5 fixed on the shaft 1.
  • the flange 5 comprises a reduction gear 6 and a set of pinions engaged with a crown 7 secured to the drum 2.
  • the rotation of the motor 4 and of the reduction gear 6 drives the crown 7 and the drum 2 in rotation around the shaft 1.
  • Two compensation devices are shown on either side of the motor 4. They each include a housing 10, 10 ′ secured to the shaft 1 and a crown 11, 11 'secured to the drum 2.
  • a compensation spring 12, 12' is housed in each housing 10, 10 '.
  • the housing 10 is made from two flanges 10 a and 10 b which are assembled around the spring 12 when the latter is put in place.
  • the housing 10 ′ is manufactured identically.
  • Each spring 12, 12 ' is connected on the one hand to the crown 11, 11' and on the other hand to the central part of the housing 10, 10 '.
  • each spring 12, 12 ' is urged to wind in the opposite direction so that it resists movement and stores energy.
  • each spring 12, 12 ′ unwinds so that it assists in the winding movement.
  • the springs 12 and 12 ′ thus compensate for the weight of the deck 3.
  • FIG. 2 and 3 The mechanism of Figures 2 and 3 is completely inserted into a fixed shaft 201 which serves as an axis of rotation for a drum not shown on which is capable of winding the deck of a roller shutter.
  • a fixed sleeve 204 is fixed with a screw 205 to the shaft 201.
  • a movable sleeve 206 free in rotation receives the free end of a compensating spiral spring 207 by means of a spacer 208 fixed by a screw 209.
  • the other end of the spiral spring 207 is made integral with the winding drum by any appropriate means.
  • an eccentric 230 provided for actuating a switch 231 such as for example a mini-breaker, this mini-breaker being used for controlling the drive device 2.
  • the mini-breaker 231 can be mounted in series with the power supply of the drum drive motor around the shaft 201.
  • the angular movement of the hexagonal profile 220 rotates the eccentric enough for it to trigger the mini-switch 231 by a pressure on its actuator 231a.
  • the angular displacement of a movable sleeve 206 is detected by the mini-switch 231 thanks to the profile 220 which plays the role of actuator, and the information can be transmitted by triggering an alarm or by cutting off the power supply to the drive motor.

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

Abstract

The roller shutter has a fixed shaft (201) and a part which moves around the shaft. A shutter is wound round the movable part by a drive system. A compensating spring (207) compensates for the couple generated by the weight of the shutter. The safety system has a mechanism for detecting rupture of the compensating spring. Several detection devices co-operate with a single activator (220) which is capable of stopping the drive system or setting off an alarm. The activator activates a breaker (231) controlling the drive system. The activator is movable between two positions under the effect of the resultant of the forces exerted on it by the compensator spring and by a release spring (212). The activator is able to engage a sleeve (206) which rotates about the shaft axis.

Description

L'invention est relative à un dispositif de sécurité pour un volet roulant ; elle a plus particulièrement trait à un volet roulant dans lequel sont disposés plusieurs ressorts de compensation du couple généré par le poids du tablier du volet.The invention relates to a safety device for a rolling shutter; it relates more particularly to a rolling shutter in which are arranged several springs for compensating the torque generated by the weight of the shutter's apron.

Un volet roulant comprend généralement plusieurs ressorts de compensation qui sont disposés parallèlement, chacun dans un boîtier, et agissent sur l'axe d'enroulement pour équilibrer le poids du tablier. Le volet roulant est entraîné soit manuellement, soit par exemple par un moteur électrique qui comporte un frein, ce frein agissant par manque de courant. Ce frein empêche le tambour d'enroulement de tourner autour de son axe en l'absence d'alimentation électrique. En général, les capacités du moteur électrique du frein et de la structure d'entraînement sont calculées pour être suffisantes même en cas de défaillance d'un ou des ressorts de compensation. Tant que les ressorts de compensation remplissent leur fonction, le volet est soumis à des efforts bien inférieurs à ceux que la structure peut supporter, et il n'y a aucun risque de défaillance, en particulier aucun risque de rupture de la transmission, cette rupture pouvant être à l'origine d'une chute brutale du rideau.A roller shutter generally comprises several compensating springs which are arranged in parallel, each in a housing, and act on the winding axis to balance the weight of the deck. The roller shutter is driven either manually or for example by an electric motor which includes a brake, this brake acting by lack of current. This brake prevents the winding drum from rotating around its axis in the absence of electrical power. In general, the capacities of the electric motor of the brake and of the drive structure are calculated to be sufficient even in the event of failure of one or more compensating springs. As long as the compensating springs fulfill their function, the shutter is subjected to forces much lower than those that the structure can support, and there is no risk of failure, in particular no risk of rupture of the transmission, this rupture can be the cause of a sudden fall of the curtain.

Il n'en est pas de même si un des ressorts de compensation vient à se rompre. Il y a alors déséquilibre sur le tambour d'enroulement du tablier et surcharge ponctuelle de la structure d'entraînement. Or, dans les systèmes connus de l'art antérieur, le système d'entraînement est susceptible de fonctionner même en cas de rupture d'un ressort de compensation. En effet, l'utilisateur ne se rend pas toujours compte qu'un ressort est devenu défectueux et il peut continuer à utiliser le volet roulant. Le risque de défaillance apparaît donc avec ses conséquences pour la sécurité de l'utilisateur dont la plus importante est la chute du volet.It is not the same if one of the compensating springs breaks. There is then an imbalance on the winding drum of the bulkhead and punctual overload of the drive structure. However, in the known systems of the prior art, the drive system is capable of operating even in the event of a compensating spring breaking. Indeed, the user does not always realize that a spring has become defective and he can continue to use the roller shutter. The risk of failure therefore appears with its consequences for the safety of the user, the most important of which is the fall of the shutter.

Pour pallier aux risques d'accident résultant de la chute d'un volet, on connaît des dispositifs de sécurité tels que celui décrit dans le brevet DE-3415879 dans lequel une bille disposée dans le creux d'une roue à dents reliée à l'axe d'enroulement vient se déplacer en position de butée à l'encontre de la roue pour l'immobiliser lorsque sa vitesse dépasse un certain seuil. On connaît d'autre part le système décrit dans le brevet DE-4002074 dans lequel un balancier oscille alternativement sous l'effet de la rotation d'une roue à dents reliée également à l'axe d'enroulement. Si sa vitesse devient excessive, l'inertie du balancier l'empêche d'osciller à une cadence suffisante et il vient en butée contre les dents de la roue. Ces dispositifs dont l'action est conditionnée par une élévation anormale de la vitesse du tambour d'enroulement et qui trouvent habituellement application sur des volets ne comportant pas de ressorts de compensation peuvent s'appliquer également sur des volets avec ressorts de compensation. Néanmoins, ils présentent l'inconvénient d'agir uniquement lorsque la rupture dans la transmission est déjà effective. En effet, il leur est nécessaire que l'augmentation de la vitesse du tambour d'enroulement soit significative, ce qui n'est pas le cas lorsqu'il y a simple défaillance d'un seul des ressorts de compensation.To overcome the risk of accident resulting from the fall of a shutter, safety devices are known such as that described in patent DE-3415879 in which a ball placed in the hollow of a toothed wheel connected to the winding axis comes to move in the stop position against the wheel to immobilize it when its speed exceeds a certain threshold. On the other hand, the system described in patent DE-4002074 is known, in which a pendulum oscillates alternately under the effect of the rotation of a toothed wheel also connected to the winding axis. If its speed becomes excessive, the inertia of the balance prevents it from oscillating at a sufficient rate and it comes into abutment against the teeth of the wheel. These devices, the action of which is conditioned by an abnormal increase in the speed of the winding drum and which usually find application on shutters which do not have compensating springs, can also be applied to shutters with compensating springs. However, they have the disadvantage of acting only when the break in the transmission is already effective. In fact, it is necessary for them that the increase in the speed of the winding drum is significant, which is not the case when there is a simple failure of only one of the compensating springs.

DE-U-93 10792 divulgue un dispositif de surveillance d'un ressort de compensation. En cas de rupture un arrêtoir et une roue d'arrêtoir coopèrent pour absorber l'énergie cinétique du mouvement. L'arrêtoir est repoussé par un ressort vers la denture de la roue d'arrêtoir. Ce dispositif est installé à l'extrémité de l'arbre d'enroulement d'un volet roulant. Il est donc apte surveiller un unique ressort de compensation.DE-U-93 10792 discloses a device for monitoring a compensating spring. In the event of a break, a stopper and a stopper wheel cooperate to absorb the kinetic energy of the movement. The retainer is pushed back by a spring towards the teeth of the retainer wheel. This device is installed at the end of the winding shaft of a rolling shutter. It is therefore able to monitor a single compensation spring.

L'invention a pour but de proposer un dispositif de sécurité pour volet roulant particulièrement adapté pour des volets roulants comprenant plusieurs ressorts de compensation répartis sur la longueur de l'arbre d'enroulement de l'arbre du volet. Ce dispositif de sécurité est apte à réagir dès la rupture d'un ressort de compensation mais avant la détérioration possible du système d'entraînement.The object of the invention is to propose a safety device for rolling shutters which is particularly suitable for rolling shutters comprising several compensating springs distributed over the length of the winding shaft of the shutter shaft. This safety device is capable of reacting from the rupture of a compensating spring but before the possible deterioration of the drive system.

Dans cet esprit, l'invention concerne un dispositif de sécurité pour volet roulant, ledit volet comprenant un arbre fixe et au moins un élément mobile autour de l'axe dudit arbre, un tablier pouvant être enroulé autour dudit élément mobile à l'aide du dispositif d'entraînement, et au moins un ressort de compensation du couple généré par le poids dudit tablier, ledit dispositif comprenant des moyens de détection de la rupture du ressort de compensation, caractérisé en ce que plusieurs moyens de détection sont aptes à coopérer avec un unique actionneur apte à déclencher l'arrêt du fonctionnement du dispositif d'entraînement ou une alarme.In this spirit, the invention relates to a safety device for rolling shutters, said shutter comprising a fixed shaft and at least one element movable around the axis of said shaft, an apron which can be wound around said movable element using the drive device, and at least one spring for compensating the torque generated by the weight of said deck, said device comprising means for detecting the rupture of the compensating spring, characterized in that several detection means are capable of cooperating with a single actuator capable of triggering the stop of the operation of the drive device or an alarm.

Grâce à l'invention, un unique actionneur est utilisé pour détecter la rupture de plusieurs ressorts de compensation, d'où une grande simplification par rapport aux systèmes connus de l'art antérieur. Cette simplification facilite la maintenance du système d'entraînement équipé du dispositif de sécurité de l'invention et diminue son prix de revient global.Thanks to the invention, a single actuator is used to detect the rupture of several compensating springs, hence a great simplification compared to the systems known from the prior art. This simplification facilitates the maintenance of the drive system equipped with the safety device of the invention and reduces its overall cost price.

Selon un premier aspect avantageux de l'invention, l'actionneur est apte à actionner un interrupteur de commande du dispositif d'entraînement. Dans ce cas, on peut prévoir que l'actionneur ouvre l'interrupteur de commande ce qui met hors circuit le moteur électrique appartenant au dispositif d'entraînement.According to a first advantageous aspect of the invention, the actuator is capable of actuating a control switch for the drive device. In this case, provision can be made for the actuator to open the control switch, which switches off the electric motor belonging to the drive device.

Selon un autre aspect avantageux de l'invention, l'actionneur est mobile entre deux positions sous l'effet de la résultante des forces exercées sur lui par le ressort de compensation et par un ressort de déclenchement.According to another advantageous aspect of the invention, the actuator is movable between two positions under the effect of the result of the forces exerted on it by the compensation spring and by a trigger spring.

Selon un autre aspect avantageux l'actionneur est apte à coopérer avec un manchon mobile en rotation autour de l'axe de l'arbre. Dans ce cas et selon un autre aspect avantageux de l'invention on peut prévoir que le ressort de compensation est fixé par l'une de ses extrémités à l'élément mobile autour de l'axe de l'arbre et par l'autre de ses extrémités au manchon.According to another advantageous aspect the actuator is able to cooperate with a sleeve movable in rotation about the axis of the shaft. In this case and according to another advantageous aspect of the invention, it is possible to provide that the compensating spring is fixed by one of its ends to the movable element around the axis of the shaft and by the other of its ends to the sleeve.

Selon un autre aspect avantageux de l'invention, le ressort de déclenchement est fixé par l'une de ses extremités à l'arbre et par l'autre de ses extrémités au manchon.According to another advantageous aspect of the invention, the trigger spring is fixed by one of its ends to the shaft and by the other of its ends to the sleeve.

Selon un autre aspect avantageux de l'invention, le dispositif de sécurité est entièrement compris à l'intérieur de l'arbre fixe. Grâce à cet aspect de l'invention, le dispositif est compact et protégé mécaniquement par l'arbre fixe.According to another advantageous aspect of the invention, the safety device is entirely included inside the fixed shaft. Thanks to this aspect of the invention, the device is compact and mechanically protected by the fixed shaft.

Selon un autre aspect avantageux de l'invention, l'actionneur porte des cames aptes à coopérer avec des butées portées avec les moyens de détection de façon à faire tourner l'actionneur avec son axe, cet actionneur portant un excentrique apte à actionner un interrupteur. Cette construction géométrique de l'actionneur et des éléments avec lesquels il coopère permet d'obtenir de façon simple et fiable la fonction recherchée grâce à une rotation de l'actionneur autour de son axe.According to another advantageous aspect of the invention, the actuator carries cams capable of cooperating with stops carried with the detection means so as to rotate the actuator with its axis, this actuator carrying an eccentric capable of actuating a switch . This geometric construction of the actuator and of the elements with which it cooperates makes it possible to obtain in a simple and reliable manner the desired function by virtue of a rotation of the actuator around its axis.

Selon un autre aspect avantageux de l'invention, les moyens de détection sont situés à l'intérieur d'un fourreau fixé sur l'arbre. Ce fourreau contient donc, pour chaque ressort de compensation, les moyens de détection aptes à coopérer avec l'actionneur qui est commun à eux tous.According to another advantageous aspect of the invention, the detection means are located inside a sheath fixed on the shaft. This sheath therefore contains, for each compensation spring, the detection means capable of cooperating with the actuator which is common to all of them.

L'invention concerne enfin un volet roulant comprenant un dispositif de sécurité tel que précédemment décrit.The invention finally relates to a rolling shutter comprising a safety device as previously described.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'un dispositif de sécurité pour volet roulant conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • La figure 1 est une vue de principe du système d'entraînement et de compensation d'un volet roulant auquel peut s'appliquer l'invention ;
  • La figure 2 est une vue de détail du système de compensation mis en oeuvre avec l'invention et
  • La figure 3 est une vue selon la ligne III-III de la figure 2.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an embodiment of a safety device for a shutter. rolling in accordance with its principle, given solely by way of example and made with reference to the appended drawings in which:
  • Figure 1 is a principle view of the drive and compensation system of a roller shutter to which the invention can be applied;
  • FIG. 2 is a detailed view of the compensation system implemented with the invention and
  • Figure 3 is a view along line III-III of Figure 2.

Le volet de la fig. 1 comprend un arbre fixe 1, formant l'axe de rotation d'un tambour 2 sur lequel peut s'enrouler le tablier 3 du volet. Le tambour 2 est entraîné en rotation par un moteur électrique 4 monté sur un flasque 5 fixe sur l'arbre 1. Le flasque 5 comprend un réducteur 6 et un jeu de pignons en prise avec une couronne 7 solidaire du tambour 2. Ainsi, la rotation du moteur 4 et du réducteur 6 entraîne la couronne 7 et le tambour 2 en rotation autour de l'arbre 1. Deux dispositifs de compensation sont figurés de part et d'autre du moteur 4. Ils comprennent chacun un boîtier 10, 10' solidaire de l'arbre 1 et une couronne 11, 11' solidaire du tambour 2. Un ressort de compensation 12, 12' est logé dans chaque boîtier 10, 10' . Le boîtier 10 est fabriqué à partir de deux flasques 10a et 10b qui sont assemblés autour du ressort 12 lorsque celui-ci est mis en place. Le boîtier 10' est fabriqué de manière identique. Chaque ressort 12, 12' est relié d'une part à la couronne 11, 11' et d'autre part à la partie centrale du boîtier 10, 10' . Lorsque le moteur électrique tourne de façon à faire dérouler le tablier 3 du tambour 2, chaque ressort 12, 12' est sollicité pour s'enrouler dans le sens inverse de sorte qu'il résiste au mouvement et emmagasine de l'energie. Lorsque le moteur 4 tourne en sens inverse, chaque ressort 12, 12' se déroule de sorte qu'il aide au mouvement d'enroulement. Les ressorts 12 et 12' compensent ainsi le poids du tablier 3.The shutter of fig. 1 comprises a fixed shaft 1, forming the axis of rotation of a drum 2 on which the apron 3 of the shutter can be wound. The drum 2 is rotated by an electric motor 4 mounted on a flange 5 fixed on the shaft 1. The flange 5 comprises a reduction gear 6 and a set of pinions engaged with a crown 7 secured to the drum 2. Thus, the rotation of the motor 4 and of the reduction gear 6 drives the crown 7 and the drum 2 in rotation around the shaft 1. Two compensation devices are shown on either side of the motor 4. They each include a housing 10, 10 ′ secured to the shaft 1 and a crown 11, 11 'secured to the drum 2. A compensation spring 12, 12' is housed in each housing 10, 10 '. The housing 10 is made from two flanges 10 a and 10 b which are assembled around the spring 12 when the latter is put in place. The housing 10 ′ is manufactured identically. Each spring 12, 12 'is connected on the one hand to the crown 11, 11' and on the other hand to the central part of the housing 10, 10 '. When the electric motor turns so as to unroll the apron 3 of the drum 2, each spring 12, 12 'is urged to wind in the opposite direction so that it resists movement and stores energy. When the motor 4 rotates in the opposite direction, each spring 12, 12 ′ unwinds so that it assists in the winding movement. The springs 12 and 12 ′ thus compensate for the weight of the deck 3.

Le mécanisme des figures 2 et 3 est complètement inséré dans un arbre 201 fixe qui sert d'axe de rotation pour un tambour non représenté sur lequel est susceptible de s'enrouler le tablier d'un volet roulant. Un fourreau fixe 204 est fixé à l'aide d'une vis 205 sur l'arbre 201. A l'intérieur de ce fourreau 204, un manchon mobile 206 libre en rotation reçoit l'extrémité libre d'un ressort spiral de compensation 207 par l'intermédiaire d'une entretoise 208 fixée par une vis 209. L'autre extrémité du ressort spiral 207 est rendue solidaire du tambour d'enroulement par tout moyen approprié.The mechanism of Figures 2 and 3 is completely inserted into a fixed shaft 201 which serves as an axis of rotation for a drum not shown on which is capable of winding the deck of a roller shutter. A fixed sleeve 204 is fixed with a screw 205 to the shaft 201. Inside this sleeve 204, a movable sleeve 206 free in rotation receives the free end of a compensating spiral spring 207 by means of a spacer 208 fixed by a screw 209. The other end of the spiral spring 207 is made integral with the winding drum by any appropriate means.

Un ressort de torsion 212 est utilisé pour réaliser le rappel du manchon mobile 206 par rapport au fourreau fixe 204. Le ressort de torsion 212 est fixé d'une part au fourreau fixe 204, et d'autre part au manchon mobile 206. Ainsi, il a tendance à déplacer le manchon 206 en rotation dans l'arbre fixe 201, ce qui est possible car cet arbre comporte une lumière 210 permettant le déplacement angulaire de l'entretoise 208.A torsion spring 212 is used to return the movable sleeve 206 relative to the fixed sleeve 204. The torsion spring 212 is fixed on the one hand to the fixed sleeve 204, and on the other hand to the mobile sleeve 206. Thus, it tends to move the sleeve 206 in rotation in the fixed shaft 201, which is possible because this shaft includes a slot 210 allowing the angular displacement of the spacer 208.

Tant que le ressort spiral de compensation fonctionne, le couple qu'il exerce à travers l'entretoise 208 sur le manchon mobile 206 est supérieur au couple exercé par le ressort de torsion 212. Ainsi, le manchon mobile est maintenu dans une position telle que l'entretoise 208 est en contact avec une extrémité de la lumière 210. En cas de rupture du ressort spiral de compensation 207, l'entretoise 208 devient libre et le manchon mobile 206 sur lequel elle est fixée est ramené en position inverse sous l'action du ressort de torsion ou ressort de déclenchement 212. Cet ensemble réagit donc à la rupture du ressort 207.As long as the compensating spiral spring is operating, the torque it exerts through the spacer 208 on the movable sleeve 206 is greater than the torque exerted by the torsion spring 212. Thus, the movable sleeve is maintained in a position such that the spacer 208 is in contact with one end of the lumen 210. In the event of rupture of the compensating spiral spring 207, the spacer 208 becomes free and the movable sleeve 206 on which it is fixed is returned to the reverse position under the action of the torsion spring or trigger spring 212. This assembly therefore reacts to the rupture of the spring 207.

Dans un volet roulant, il existe en général plusieurs ressorts de compensation et on dispose autant de mécanismes à l'intérieur de l'axe qu'il y a de ressorts de compensation. Un profilé hexagonal 220 situé à l'intérieur de l'arbre 201 le traverse sur la plus grande partie de sa longueur. Sur ce profilé 220 sont fixées des cames 221.In a rolling shutter, there are generally several compensating springs and there are as many mechanisms inside the axis as there are compensating springs. A hexagonal profile 220 located inside the shaft 201 crosses it over most of its length. On this profile 220 are fixed cams 221.

Lorsque une entretoise 208 associée à l'un des ressorts de compensation 207 est libérée par rupture du ressort correspondant, le manchon mobile est déplacé par le ressort de déclenchement 212, et une butée interne 222 du manchon 206 est déplacée angulairement contre la came 221, ce qui a pour conséquence de faire tourner le profilé 220 autour de son axe XX'.When a spacer 208 associated with one of the compensation springs 207 is released by rupture of the corresponding spring, the movable sleeve is moved by the trigger spring 212, and an internal stop 222 of the sleeve 206 is angularly moved against the cam 221, which has the consequence of rotating the profile 220 around its axis XX '.

A une extrémité du profilé hexagonal 220 est monté un excentrique 230 prévu pour actionner un interrupteur 231 tel que par exemple un mini-rupteur, ce mini-rupteur servant à la commande du dispositif d'entraînement 2. Par exemple, le mini-rupteur 231 peut être monté en série avec l'alimentation électrique du moteur d'antraînement du tambour autour de l'arbre 201. Le mouvement angulaire du profilé hexagonal 220 fait tourner l'excentrique suffisamment pour qu'il déclenche le mini-rupteur 231 par une pression sur son actionneur 231a. Ainsi le déplacement angulaire d'un manchon mobile 206 est détecté par le mini-rupteur 231 grâce au profilé 220 qui joue le rôle d'actionneur, et l'information peut être transmise par déclenchement d'une alarme ou par coupure de l'alimentation éléctrique du moteur d'entraînement.At one end of the hexagonal profile 220 is mounted an eccentric 230 provided for actuating a switch 231 such as for example a mini-breaker, this mini-breaker being used for controlling the drive device 2. For example, the mini-breaker 231 can be mounted in series with the power supply of the drum drive motor around the shaft 201. The angular movement of the hexagonal profile 220 rotates the eccentric enough for it to trigger the mini-switch 231 by a pressure on its actuator 231a. Thus the angular displacement of a movable sleeve 206 is detected by the mini-switch 231 thanks to the profile 220 which plays the role of actuator, and the information can be transmitted by triggering an alarm or by cutting off the power supply to the drive motor.

Il est a noter qu'un unique mini-rupteur peut être actionné par le mouvement de plusieurs manchons mobiles 206. Ceci permet de simplifier l'installation et d'en diminuer le coût. En outre, l'ensemble du dispositif de détection est compris à l'intérieur de l'arbre 201. Il peut être installé dans l'arbre 201, avant son montage à l'intérieur d'un volet roulant. Les opérations de montage en sont donc simplifiées.It should be noted that a single mini-switch can be actuated by the movement of several mobile sleeves 206. This simplifies the installation and reduces the cost. In addition, the entire detection device is included inside the shaft 201. It can be installed in the shaft 201, before it is mounted inside a rolling shutter. The assembly operations are therefore simplified.

Le volet roulant a été représenté avec un tambour 2, mais il peut fonctionner avec des couronnes 7, 11 reliées directement au tablier 3 du volet, en particulier si celui-ci est formé de lattes ou lames.The roller shutter has been shown with a drum 2, but it can operate with rings 7, 11 connected directly to the deck 3 of the shutter, in particular if the latter is formed of slats or blades.

Claims (10)

Dispositif de sécurité pour volet roulant, ledit volet comprenant un arbre (1, 201) fixe et au moins un élément (2, 7, 11) mobile autour de l'axe dudit arbre, un tablier (3) pouvant être enroulé autour dudit élément mobile à l'aide d'un dispositif d'entraînement, et au moins un ressort de compensation (12, 207) du couple généré par le poids dudit tablier, ledit dispositif comprenant des moyens de détection de la rupture dudit ressort de compensation, caractérisé en ce que plusieurs moyens de détection (206, 208, 222) sont aptes à coopérer avec un unique actionneur (220) apte à déclencher l'arrêt du fonctionnement du dispositif d'entraînement ou une alarme.Safety device for a rolling shutter, said shutter comprising a fixed shaft (1, 201) and at least one element (2, 7, 11) movable around the axis of said shaft, an apron (3) being able to be wound around said element movable using a drive device, and at least one compensation spring (12, 207) for the torque generated by the weight of said deck, said device comprising means for detecting the rupture of said compensation spring, characterized in that several detection means (206, 208, 222) are able to cooperate with a single actuator (220) capable of triggering the stop of the operation of the drive device or an alarm. Dispositif de sécurité selon la revendication 1, caractérisé en ce que ledit actionneur (220) est apte à actionner un interrupteur (231) de commande dudit dispositif d'entraînement (2).Safety device according to claim 1, characterized in that said actuator (220) is capable of actuating a switch (231) for controlling said drive device (2). Dispositif de sécurité selon la revendication 1, caractérisé en ce que ledit actionneur (220) est mobile entre deux positions sous l'effet de la résultante des forces exercées sur lui par ledit ressort de compensation (207) et par un ressort de déclenchement (212).Safety device according to claim 1, characterized in that said actuator (220) is movable between two positions under the effect of the result of the forces exerted on it by said compensating spring (207) and by a trigger spring (212 ). Dispositif de sécurité selon la revendication 3, caractérisé en ce que ledit actionneur (220) est apte à coopérer avec un manchon (206) mobile en rotation, autour de l'axe dudit arbre (201).Safety device according to claim 3, characterized in that said actuator (220) is able to cooperate with a sleeve (206) movable in rotation, around the axis of said shaft (201). Dispositif de sécurité selon la revendication 4, caractérisé en ce que ledit ressort de compensation (207) est fixé par l'une de ses extrémités audit élément (2, 7, 11) mobile autour de l'axe dudit arbre (201) et, par l'autre de ses extrémités audit manchon (206).Safety device according to claim 4, characterized in that said compensation spring (207) is fixed by one of its ends to said element (2, 7, 11) movable around the axis of said shaft (201) and, by the other of its ends to said sleeve (206). Dispositif de sécurité selon les revendications 3 et 4, caractérisé en ce que ledit ressort de déclenchement (212) est fixé par l'une de ses extrémités audit arbre (201) et, par l'autre de ses extrémités, audit manchon (206).Safety device according to claims 3 and 4, characterized in that said trigger spring (212) is fixed by one of its ends to said shaft (201) and, by the other of its ends, to said sleeve (206) . Dispositif de sécurité selon la revendication 1, caractérisé en ce qu'il est entièrement compris à l'intérieur dudit arbre fixe (201).Safety device according to claim 1, characterized in that it is entirely included inside said fixed shaft (201). Dispositif de sécurité selon la revendication 1, caractérisé en ce que ledit actionneur porte des cames (221) aptes à coopérer avec des butées (222) portées par lesdits moyens de détection de façon à faire tourner ledit actionneur autour de son axe (XX'), ledit actionneur portant un excentrique (230) apte à actionner un interrupteur (231).Safety device according to claim 1, characterized in that said actuator carries cams (221) capable of cooperating with stops (222) carried by said detection means so as to rotate said actuator about its axis (XX ') , said actuator carrying an eccentric (230) capable of actuating a switch (231). Dispositif de sécurité selon la revendication 1, caractérisé en ce que lesdits moyens de détection (206, 208, 222) sont situés à l'intérieur d'un fourreau (204) fixé sur ledit arbre (201).Safety device according to claim 1, characterized in that said detection means (206, 208, 222) are located inside a sheath (204) fixed on said shaft (201). Volet roulant comprenant un dispositif de sécurité selon l'une des revendications précédentes.Roller shutter comprising a security device according to one of the preceding claims.
EP96420337A 1995-11-27 1996-11-26 Safety device for roller shutter Withdrawn EP0775799A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9514444A FR2741662A1 (en) 1995-11-27 1995-11-27 SAFETY DEVICE FOR SHUTTER
FR9514444 1995-11-27

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EP0775799A1 true EP0775799A1 (en) 1997-05-28

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WO2007106334A2 (en) * 2006-03-14 2007-09-20 Wayne-Dalton Corp. Pivoting barrier operator system with integral cable storage drum and transfer assembly
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US8887788B2 (en) 1997-11-04 2014-11-18 Russell L. Hinckley, SR. Methods for operating window covers
US9574396B2 (en) 1997-11-04 2017-02-21 Russell L. Hinckley, SR. Systems for maintaining window covers
US9359814B2 (en) 1997-11-04 2016-06-07 Russel L. Hinckley Systems for maintaining window covers
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WO2007106334A3 (en) * 2006-03-14 2008-06-26 Wayne Dalton Corp Pivoting barrier operator system with integral cable storage drum and transfer assembly
US7717155B2 (en) 2006-03-14 2010-05-18 Homerun Holdings Corp. Pivoting barrier operator system with integral cable storage drum and transfer assembly
WO2007106334A2 (en) * 2006-03-14 2007-09-20 Wayne-Dalton Corp. Pivoting barrier operator system with integral cable storage drum and transfer assembly
DE102012025621A1 (en) 2012-06-15 2014-08-14 Brichta Gmbh Obscuring device, particularly winding-covering device for obscuring system for concealing opening, has rolling safety device comprising tilt element with tilt lever which is held in unstable position outside rolling plane by holding magnet
DE102012011796A1 (en) * 2012-06-15 2013-12-19 Brichta Gmbh Darkening device for covering opening with curtain, has spring breakage sensor that is located for monitoring condition of return spring and/or roll-off protection and/or electromagnetic clutch
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DE102012011796B4 (en) * 2012-06-15 2016-05-25 Brichta Gmbh Dimming device and dimming system and method for operating a dimming system

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