EP0750092A1 - Roll-up device for venetian blinds - Google Patents

Roll-up device for venetian blinds Download PDF

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Publication number
EP0750092A1
EP0750092A1 EP96810355A EP96810355A EP0750092A1 EP 0750092 A1 EP0750092 A1 EP 0750092A1 EP 96810355 A EP96810355 A EP 96810355A EP 96810355 A EP96810355 A EP 96810355A EP 0750092 A1 EP0750092 A1 EP 0750092A1
Authority
EP
European Patent Office
Prior art keywords
cage
blind
screw
motor
rotation
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.)
Granted
Application number
EP96810355A
Other languages
German (de)
French (fr)
Other versions
EP0750092B1 (en
Inventor
Jean-Michael Perache
Eric Lagarde
Jean Jacques Marie De Chevron Villette
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Somfy SA
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Somfy SA
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Publication of EP0750092A1 publication Critical patent/EP0750092A1/en
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Publication of EP0750092B1 publication Critical patent/EP0750092B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/88—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for limiting unrolling
    • 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
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/303—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/308—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape with coaxial tilting bar and raising shaft
    • 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
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • 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
    • E06B2009/6809—Control
    • E06B2009/6818—Control using sensors
    • E06B2009/6854—Control using sensors sensing torque
    • 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
    • E06B2009/6809—Control
    • E06B2009/6872—Control using counters to determine shutter position
    • E06B2009/6881—Mechanical counters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S160/00—Flexible or portable closure, partition, or panel
    • Y10S160/17—Venetian blinds, motor driven

Definitions

  • the subject of the present invention is a device for winding cords or ribbons of a Venetian or pleated blind comprising, housed in a box, an electric motor equipped with a brake, a reduction gear, at least one output shaft driving two drums. winding on which the cords are wound, respectively the ribbons of the blind, automatic stop means when the blind is fully rolled up, automatic stop means when the blind has reached a desired state of unwinding, detection means an engine blockage causing the engine to stop when such a blockage is detected and means for adjusting the low stopping point corresponding to the desired unwinding state.
  • Document DE 33 02 529 discloses a device for winding ribbons for a Venetian blind equipped with a tubular gear motor, the automatic stop of which is ensured by a lap counting device comprising two screws driven by the motor and carrying each a sliding nut in the form of toothed wheels engaged with a grooved shaft which immobilizes them in rotation, each of these sliding nuts actuating a switch after a certain displacement, the actuation of these switches ensuring the stopping of the engine, respectively in the rolled up position and in the unrolled position of the blind.
  • the adjustment of the stopping point is carried out by manually driving the splined shaft, which has the effect of moving the sliding nuts along their screw.
  • Document DE 1 763 272 discloses a winding device for a Venetian blind, the top stop point of which is ensured by a switch actuated directly by the blind when it is fully rolled up and the bottom stop point of which is determined. by a revolution counting device comprising a single screw on which a sliding nut moves actuating a switch. There is no provision for adjusting the stopping point in the fully extended position of the blind (low point). For this purpose, it would be necessary either to drive the screw of the device counting revolutions, which would require means of disengaging between the screw and the motor, or to move the switch, which would require mounting the switch on a screw. The use of a switch for stopping at the highest point also requires drawing wires between the switch and the motor.
  • Venetian blinds with manual drive are known in which part of the drive shaft consists of a screw carrying a sliding nut moving between two stops consisting of nuts mounted and locked on the same screw. The position of one of these nuts determines the fully extended position of the blind, position in which the sliding nut abuts against this stop.
  • one or other of the stop nuts is used as a stop stop in the unrolled position. To adjust the blind stop point in the unrolled position (low point), the sliding nut is brought into abutment against the stop determining the low point and the blind deployed and then hung. There is no way to change this setting later and this is very annoying. It is indeed very difficult to fix a deployed blind exactly at the desired unwound position.
  • the present invention aims to offer a winding device comprising means for stopping the blind in mechanically simple high and low positions ensuring, in all circumstances, a complete raising of the blind and allowing, by simple means, an adjustment adjustment of the blind bottom breakpoint.
  • the winding device is characterized in that the means for stopping the blind in the desired unwinding position consist of a screw mounted coaxially and integral in rotation with said output shaft in a cylindrical cage immobilized in rotation in the box by manually actuable blocking means and a sliding nut mounted on the screw and immobilized in rotation in said cage, the stopping of the motor in the fully rolled up position of the blind being ensured by the abutment of the blind against the box and the detection of a blockage of the motor and the stopping of the blind at the low point being ensured by the abutment of the sliding nut against a fixed abutment secured to the cage and the detection of an engine blockage, the adjustment of the low stopping point being effected by the unlocking of said cage and its rotation drive.
  • the engine is stopped by detecting its blocking can be done by any means of detecting or analyzing a variation of an electrical quantity linked to the mechanical blocking of the rotor of the motor, in particular by one of the devices described in the documents cited above.
  • the cage blocking means may consist, for example, of a single screw, preferably a needle screw, or of a gear screw meshing with a helical toothing formed on the periphery of the cage.
  • the screw also makes it possible to drive the cage in rotation for the adjustment of the bottom breakpoint.
  • a geared motor 2 having two opposite output shafts 3 and 5 and a revolution counting device 5.
  • the counting device 5 comprises a screw 6 extending the output axis 4 and integral , by a pin 18, in rotation of this axis and a sliding nut 7 immobilized in rotation in a longitudinal groove 8 provided in the inner wall of a cage 9 in the form of a cylindrical pot mounted in a cradle 10 secured to the box 1.
  • the end of the screw 6 opposite the gear motor 2 is secured in rotation, by a pin 19, to a shaft 11 carrying a first winding cone 12 on which is wound a first cord 13 of a blind not shown.
  • the shaft 3 carries a second winding cone 14 on which a second cord 15 is wound.
  • the winding cones 13 and 15 are, for example, winding cones as described in document EP 0 554 212.
  • the cage 9 is provided, on at least part of its circumference, with a helical toothing 16 meshing with a transverse screw 17 rotating in cradle 10, immobilized in translation in this cradle and accessible from the exterior of the box 1.
  • the cage 9 is therefore immobilized in rotation by the screw 17, but it can rotate in its cradle during the driving of the screw 17 in rotation.
  • the motor is also equipped with a brake, for example an electromagnetic brake operating by absence of supply current and means for detecting a blockage of the motor detecting, for example, an overconsumption causing the interruption of said supply of the motor and the brake when overcurrent consumption is detected.
  • a brake for example an electromagnetic brake operating by absence of supply current and means for detecting a blockage of the motor detecting, for example, an overconsumption causing the interruption of said supply of the motor and the brake when overcurrent consumption is detected.
  • the sliding nut 7 When installing the blind, the sliding nut 7 is brought into abutment against the bottom of its cage 9, that is to say on the side of the shaft 11. The blind is then hung in its unrolled position. To perfect the low stopping point so as to allow a little more unwinding, one acts on the screw 17. The engine being stopped is kept blocked by its brake, the screw 6 is immobilized, so that the driving the cage 9 in rotation makes it possible to move the sliding nut 7 away from the bottom of the cage. The motor is then reactivated and the blind unwinds until the sliding nut 7 abuts against the bottom of the cage 9. The motor is then blocked, an overconsumption of current is detected and the supply of the motor and his brake is cut off. By successive approaches, we perfect the adjustment.
  • Stopping the blind in the fully rolled up position is ensured by the abutment of the packet of blades of the blind against the box 1, which has the effect of strongly braking the motor, the detection means of which detect an overconsumption of current, which has the effect of cutting off the power to the motor.
  • the screw 17 is replaced by a simple radial screw, preferably a needle screw.
  • the low breakpoint setting in order to obtain a little more unwinding, can be executed in another way.
  • the motor With the needle screw loose, the motor is started.
  • the sliding nut 7 is in abutment against the bottom of the cage 9, the screw 6 can turn by driving the cage 9.
  • the power supply to the motor is cut and the cage 9 using the needle screw.
  • the unlocked cage 9 could be manually rotated through a cutout provided in the box.
  • the drive could be direct or via a wheel.
  • the cage 9 in the form of a pot also constitutes a dust-proof casing which protects the screw 6 and its sliding nut. It has indeed occurred, in known devices, that the dust disturbs the operation of the automatic stop device.

Landscapes

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

Abstract

The cord winding system for a Venetian blind comprises an electric motor (2) and a reducer housed in a casing (1). The reducer output shafts (3,4) drive two winding drums (12,14) on which the cords (13,15) are wound. A stop for when the blind is unwound by a desired amount is constituted by a screw (6) mounted coaxially and rotating with the output shaft in a cylindrical cage (9). A floating nut (7) on the screw is prevented from rotating in the cage. Motor stoppage for the completely unwound position of the blind is ensured by the blind abutting against the casing. Stopping of the blind is caused by the abutment of the nut against a stop fixed to the cage. Adjustment of the bottom stopping point is made by unlocking the cage and its rotational drive. Rotational locking of the cage in the casing is constituted by a transverse gear screw (17) meshing with a cage helicoidal tooth (16).

Description

La présente invention a pour objet un dispositif d'enroulement de cordons ou de rubans de store vénitien ou plissé comprenant, logés dans un caisson, un moteur électrique équipé d'un frein, un réducteur, au moins un arbre de sortie entraînant deux tambours d'enroulement sur lesquels s'enroulent les cordons, respectivement les rubans du store, des moyens d'arrêt automatique lorsque le store est complètement enroulé, des moyens d'arrêt automatique lorsque le store a atteint un état de déroulement désiré, des moyens de détection d'un blocage du moteur provoquant l'arrêt du moteur lors de la détection d'un tel blocage et des moyens de réglage du point d'arrêt bas correspondant à l'état de déroulement désiré.The subject of the present invention is a device for winding cords or ribbons of a Venetian or pleated blind comprising, housed in a box, an electric motor equipped with a brake, a reduction gear, at least one output shaft driving two drums. winding on which the cords are wound, respectively the ribbons of the blind, automatic stop means when the blind is fully rolled up, automatic stop means when the blind has reached a desired state of unwinding, detection means an engine blockage causing the engine to stop when such a blockage is detected and means for adjusting the low stopping point corresponding to the desired unwinding state.

Du document DE 33 02 529, on connaît un dispositif d'enroulement de rubans pour store vénitien équipé d'un moto-réducteur tubulaire dont l'arrêt automatique est assuré par un dispositif de comptage de tours comprenant deux vis entraînées par le moteur et portant chacune un écrou baladeur en forme de roues dentées en prise avec un arbre cannelé qui les immobilise en rotation, chacun de ces écrous baladeurs actionnant un interrupteur au bout d'un certain déplacement, l'actionnement de ces interrupteurs assurant l'arrêt du moteur, respectivement en position enroulée et en position déroulée du store. Le réglage du point d'arrêt s'effectue en entraînant manuellement l'arbre cannelé, ce qui a pour effet de déplacer les écrous baladeurs le long de leur vis. Malgré les possibilités de réglage offertes par ces dispositifs d'enroulement, ceux-ci présentent l'inconvénient de ne pas tenir compte des conditions hygrométriques au moment de l'installation et des variations de ces conditions, qui entraînent des variations de longueur des cordons, respectivement des rubans, ni des variations de longueur dues à l'usure. Si le taux d'humidité est faible, les cordons s'allongent et cet allongement, conjugué avec les évolutions structurelles de l'installation, a pour résultat que des des modifications dans les positions hautes d'arrêt apparaissent. Dans le cas où plusieurs stores sont disposés côte à côte sur une façade d'immeuble, par exemple, les stores ne sont pas tous complètement relevés en position d'arrêt haut car les points d'arrêt sont différents les uns des autres, ce qui est particulièrement disgracieux. Si le taux d'humidité est important, il se produit plutôt une diminution de la longueur des cordons dont la conséquence est un arrêt mécanique par butée du paquet de lames contre le caisson de l'installation avant l'arrêt électroanique. Le moteur reste alors sous tension, au rythme du cycle de la sécurité thermique, et se détériore rapidement. En outre, le réglage des points d'arrêt s'effectue au moyen d'une mécanique relativement compliquée et fragile.Document DE 33 02 529 discloses a device for winding ribbons for a Venetian blind equipped with a tubular gear motor, the automatic stop of which is ensured by a lap counting device comprising two screws driven by the motor and carrying each a sliding nut in the form of toothed wheels engaged with a grooved shaft which immobilizes them in rotation, each of these sliding nuts actuating a switch after a certain displacement, the actuation of these switches ensuring the stopping of the engine, respectively in the rolled up position and in the unrolled position of the blind. The adjustment of the stopping point is carried out by manually driving the splined shaft, which has the effect of moving the sliding nuts along their screw. Despite the adjustment possibilities offered by these winding devices, they have the disadvantage of not taking into account the hygrometric conditions at the time of installation and variations in these conditions, which lead to variations in the length of the cords, respectively of the ribbons, or variations in length due to wear. If the humidity is low, the cords lengthen and this elongation, combined with the structural changes in the installation, results in modifications in the high stop positions. In the case where several blinds are arranged side by side on a building facade, for example, the blinds are not all completely raised in the high stop position because the stop points are different from each other, which is particularly unsightly. If the humidity is high, there is rather a decrease in the length of the cords, the consequence of which is a mechanical stop by abutment of the blade pack against the installation box before the electro-mechanical stop. The engine then remains energized, at the rate of the thermal safety cycle, and deteriorates rapidly. In addition, the adjustment of the breakpoints is carried out by means of a relatively complicated and fragile mechanism.

Du document DE 1 763 272, on connaît un dispositif d'enroulement pour store vénitien dont le point d'arrêt haut est assuré par un interrupteur actionné directement par le store lorsqu'il est complètement enroulé et dont le point d'arrêt bas est déterminé par un dispositif de comptage de tours comprenant une seule vis sur laquelle se déplace un écrou baladeur actionnant un interrupteur. Il n'est pas prévu de moyen de réglage du point d'arrêt en position complètement déroulée du store (point bas). A cet effet, il serait nécessaire soit d'entraîner la vis du dispositif de comptage de tours, ce qui nécessiterait des moyens de débrayage entre la vis et le moteur, soit de déplacer l'interrupteur, ce qui nécessiterait le montage de l'interrupteur sur une vis. L'utilisation d'un interrupteur pour l'arrêt au point haut nécessite en outre de tirer des fils entre l'interrupteur et le moteur.Document DE 1 763 272 discloses a winding device for a Venetian blind, the top stop point of which is ensured by a switch actuated directly by the blind when it is fully rolled up and the bottom stop point of which is determined. by a revolution counting device comprising a single screw on which a sliding nut moves actuating a switch. There is no provision for adjusting the stopping point in the fully extended position of the blind (low point). For this purpose, it would be necessary either to drive the screw of the device counting revolutions, which would require means of disengaging between the screw and the motor, or to move the switch, which would require mounting the switch on a screw. The use of a switch for stopping at the highest point also requires drawing wires between the switch and the motor.

On connaît également des dispositifs d'enroulement de stores dans lesquels l'arrêt de l'élément enroulable est assuré par la détection d'une baisse de vitesse de déplacement de l'élément enroulable (EP 0 533 625, EP 0 573 388). De tels dispositifs exigent des moyens de détection et une électronique relativement coûteux.There are also known devices for winding blinds in which the rolling element is stopped by detecting a drop in the speed of movement of the rolling element (EP 0 533 625, EP 0 573 388). Such devices require relatively expensive detection means and electronics.

On connaît en outre divers dispositifs détectant le freinage ou le blocage d'un moteur par la détection d'une surintensité de courant (JP 42 50 286, DE 42 44 378), la détection d'une variation de vitesse (DE 44 01 463) ou d'une chute de tension sur la phase auxiliaire d'un moteur asynchrone (DE 43 12 987) ou aux bornes du condensateur de déphasage (EP 0 551 053).We also know various devices detecting the braking or blocking of a motor by the detection of an overcurrent (JP 42 50 286, DE 42 44 378), the detection of a speed variation (DE 44 01 463 ) or a voltage drop on the auxiliary phase of an asynchronous motor (DE 43 12 987) or at the terminals of the phase shift capacitor (EP 0 551 053).

On connaît enfin des stores vénitiens à entraînement manuel dans lesquels une partie de l'arbre d'entraînement est constituée d'une vis portant un écrou baladeur se déplaçant entre deux butées constituées d'écrous montés et bloqués sur la même vis. La position de l'un de ces écrous détermine la position complètement déroulée du store, position dans laquelle l'écrou baladeur vient buter contre cette butée. Selon le sens de montage du dispositif, l'un ou l'autre des écrous butées est utilisé comme butée d'arrêt en position déroulée. Pour effectuer le réglage du point d'arrêt du store en position déroulée (point bas), l'écrou baladeur est amené en butée contre la butée déterminant le point bas et le store déployé et alors accroché. Il n'y a aucun moyen permettant de modifier ultérieurement ce réglage et ceci est très gênant. Il est en effet très difficile de fixer un store déployé exactement à la position déroulée désirée. En outre, à l'usage, surtout dans les premiers temps d'utilisation, les éléments se mettant en place, il apparaît des modifications dans la position réelle d'arrêt. Pour modifier le réglage, il est alors nécessaire d'accéder à l'écrou de butée et, pour cela, il faut démonter le caisson dans lequel est monté le dispositif d'enroulement.Finally, Venetian blinds with manual drive are known in which part of the drive shaft consists of a screw carrying a sliding nut moving between two stops consisting of nuts mounted and locked on the same screw. The position of one of these nuts determines the fully extended position of the blind, position in which the sliding nut abuts against this stop. Depending on the mounting direction of the device, one or other of the stop nuts is used as a stop stop in the unrolled position. To adjust the blind stop point in the unrolled position (low point), the sliding nut is brought into abutment against the stop determining the low point and the blind deployed and then hung. There is no way to change this setting later and this is very annoying. It is indeed very difficult to fix a deployed blind exactly at the desired unwound position. In addition, in use, especially in the first times of use, the elements being put in place, changes appear in the actual stop position. To modify the setting, it is then necessary to access the stop nut and, for this, it is necessary to dismantle the box in which the winding device is mounted.

La présente invention a pour but d'offrir un dispositif d'enroulement comprenant des moyens d'arrêt du store en positions haute et basse mécaniquement simples assurant, en toutes circonstances, un relèvement complet du store et permettant, par des moyens simples, un ajustement du réglage du point d'arrêt bas du store.The present invention aims to offer a winding device comprising means for stopping the blind in mechanically simple high and low positions ensuring, in all circumstances, a complete raising of the blind and allowing, by simple means, an adjustment adjustment of the blind bottom breakpoint.

Le dispositif d'enroulement selon l'invention est caractérisé en ce que les moyens d'arrêt du store dans la position de déroulement désirée sont constitués d'une vis montée coaxialement et solidaire en rotation avec ledit arbre de sortie dans une cage cylindrique immobilisée en rotation dans le caisson par des moyens de blocage actionnables manuellement et un écrou baladeur monté sur la vis et immobilisé en rotation dans ladite cage, l'arrêt du moteur en position complètement enroulée du store étant assuré par la venue en butée du store contre le caisson et la détection d'un blocage du moteur et l'arrêt du store au point bas étant assuré par la venue en butée de l'écrou baladeur contre une butée fixe solidaire de la cage et la détection d'un blocage du moteur, le réglage du point d'arrêt bas s'effectuant par le déblocage de ladite cage et son entraînement en rotation.The winding device according to the invention is characterized in that the means for stopping the blind in the desired unwinding position consist of a screw mounted coaxially and integral in rotation with said output shaft in a cylindrical cage immobilized in rotation in the box by manually actuable blocking means and a sliding nut mounted on the screw and immobilized in rotation in said cage, the stopping of the motor in the fully rolled up position of the blind being ensured by the abutment of the blind against the box and the detection of a blockage of the motor and the stopping of the blind at the low point being ensured by the abutment of the sliding nut against a fixed abutment secured to the cage and the detection of an engine blockage, the adjustment of the low stopping point being effected by the unlocking of said cage and its rotation drive.

L'arrêt du moteur par détection de son blocage peut se faire par tout moyen de détection ou d'analyse d'une variation d'une grandeur électrique liée au blocage mécanique du rotor du moteur, en particulier par l'un des dispositifs décrits dans les documents cités plus haut.The engine is stopped by detecting its blocking can be done by any means of detecting or analyzing a variation of an electrical quantity linked to the mechanical blocking of the rotor of the motor, in particular by one of the devices described in the documents cited above.

Les moyens de blocage de la cage peuvent être constitués, par exemple, d'une simple vis, de préférence une vis pointeau, ou d'une vis d'engrenage engrenant avec une denture hélicoïdale formée sur le pourtour de la cage. Dans le second cas, la vis permet également d'entraîner la cage en rotation pour le réglage du point d'arrêt bas.The cage blocking means may consist, for example, of a single screw, preferably a needle screw, or of a gear screw meshing with a helical toothing formed on the periphery of the cage. In the second case, the screw also makes it possible to drive the cage in rotation for the adjustment of the bottom breakpoint.

Le dessin annexé représente, à titre d'exemple, une forme d'exécution de l'invention.The accompanying drawing shows, by way of example, an embodiment of the invention.

L'unique figure du dessin est une vue partielle en coupe axiale d'un dispositif d'enroulement monté dans un caisson.The only figure in the drawing is a partial view in axial section of a winding device mounted in a box.

Dans un caisson 1 de section rectangulaire sont montés un moto-réducteur 2 présentant deux arbres de sortie opposés 3 et 5 et un dispositif de comptage de tours 5. Le dispositif de comptage 5 comprend une vis 6 prolongeant l'axe de sortie 4 et solidaire, par une goupille 18, en rotation de cet axe et un écrou baladeur 7 immobilisé en rotation dans une rainure longitudinale 8 prévue dans la paroi intérieure d'une cage 9 en forme de pot cylindrique montée dans un berceau 10 solidaire du caisson 1. L'extrémité de la vis 6 opposée au moto-réducteur 2 est solidaire en rotation, par une goupille 19, d'un arbre 11 portant un premier cône d'enroulement 12 sur lequel vient s'enrouler un premier cordon 13 d'un store non représenté. De l'autre côté, l'arbre 3 porte un second cône d'enroulement 14 sur lequel vient s'enrouler un second cordon 15. Les cônes d'enroulement 13 et 15 sont, par exemple, des cônes d'enroulement tels que décrits dans le document EP 0 554 212. La cage 9 est munie, sur au moins une partie de sa circonférence, d'une denture hélicoïdale 16 engrenant avec une vis transversale 17 tournant dans berceau 10, immobilisée en translation dans ce berceau et accessible de l'extérieur du caisson 1. La cage 9 est donc immobilisée en rotation par la vis 17, mais elle peut tourner dans son berceau lors de l'entraînement de la vis 17 en rotation. Le moteur est en outre équipé d'un frein, par exemple un frein électromagnétique opérant par absence de courant d'alimentation et de moyens de détection d'un blocage du moteur détectant, par exemple, une surconsommation provoquant la coupure de ladite alimentation du moteur et du frein lorsqu'une surconsommation de courant est détectée. Ces moyens de détection peuvent être réalisés, par exemple, comme décrits plus haut dans l'un des documents cités plus haut. Au lieu d'un frein électromagnétique, le moteur pourrait être équipé d'un frein mécanique à dispositif antiretour.In a box 1 of rectangular section are mounted a geared motor 2 having two opposite output shafts 3 and 5 and a revolution counting device 5. The counting device 5 comprises a screw 6 extending the output axis 4 and integral , by a pin 18, in rotation of this axis and a sliding nut 7 immobilized in rotation in a longitudinal groove 8 provided in the inner wall of a cage 9 in the form of a cylindrical pot mounted in a cradle 10 secured to the box 1. The end of the screw 6 opposite the gear motor 2 is secured in rotation, by a pin 19, to a shaft 11 carrying a first winding cone 12 on which is wound a first cord 13 of a blind not shown. On the other side, the shaft 3 carries a second winding cone 14 on which a second cord 15 is wound. The winding cones 13 and 15 are, for example, winding cones as described in document EP 0 554 212. The cage 9 is provided, on at least part of its circumference, with a helical toothing 16 meshing with a transverse screw 17 rotating in cradle 10, immobilized in translation in this cradle and accessible from the exterior of the box 1. The cage 9 is therefore immobilized in rotation by the screw 17, but it can rotate in its cradle during the driving of the screw 17 in rotation. The motor is also equipped with a brake, for example an electromagnetic brake operating by absence of supply current and means for detecting a blockage of the motor detecting, for example, an overconsumption causing the interruption of said supply of the motor and the brake when overcurrent consumption is detected. These detection means can be produced, for example, as described above in one of the documents cited above. Instead of an electromagnetic brake, the motor could be fitted with a mechanical brake with non-return device.

Le fonctionnement de ce dispositif est le suivant :The operation of this device is as follows:

Lors de l'installation du store, l'écrou baladeur 7 est amené en butée contre le fond de sa cage 9, c'est-à-dire du côté de l'arbre 11. Le store est ensuite accroché dans sa position déroulée. Pour parfaire le point d'arrêt bas de manière à permettre un peu plus de déroulement, on agit sur la vis 17. Le moteur étant à l'arrêt est maintenu bloqué par son frein, la vis 6 est immobilisée, de sorte que l'entraînement en rotation de la cage 9 permet d'écarter l'écrou baladeur 7 du fond de la cage. Le moteur est alors réactivé et le store se déroule jusqu'à ce que l'écrou baladeur 7 vienne buter contre le fond de la cage 9. Le moteur est alors bloqué, une surconsommation de courant est détectée et l'alimentation du moteur et de son frein est coupée. Par approches successives, on parfait le réglage.When installing the blind, the sliding nut 7 is brought into abutment against the bottom of its cage 9, that is to say on the side of the shaft 11. The blind is then hung in its unrolled position. To perfect the low stopping point so as to allow a little more unwinding, one acts on the screw 17. The engine being stopped is kept blocked by its brake, the screw 6 is immobilized, so that the driving the cage 9 in rotation makes it possible to move the sliding nut 7 away from the bottom of the cage. The motor is then reactivated and the blind unwinds until the sliding nut 7 abuts against the bottom of the cage 9. The motor is then blocked, an overconsumption of current is detected and the supply of the motor and his brake is cut off. By successive approaches, we perfect the adjustment.

Si, au départ, le store n'est pas assez déroulé, on commence par le réenrouler légèrement en activant le moteur dans le sens de l'enroulement de manière à amener le store dans une position légèrement supérieure à la position d'arrêt bas désirée. Le moteur étant à l'arrêt, on fait tourner le cage 9 au moyen de la vis 17 de manière à amener l'écrou baladeur 7 en butée contre le fond de la cage. On se retrouve alors dans la situation précédente dans laquelle le store est moins déroulé que souhaité et on procède au réglage comme précédemment.If, at the start, the blind is not rolled out enough, we start by rewinding it slightly by activating the motor in the winding direction so as to bring the blind into a position slightly higher than the desired low stop position . With the engine stopped, the cage 9 is rotated by means of the screw 17 so as to bring the sliding nut 7 into abutment against the bottom of the cage. We then find ourselves in the previous situation in which the blind is less unwound than desired and we proceed to the adjustment as above.

L'arrêt du store en position complètement enroulée est assuré par la venue en butée du paquet de lames du store contre le caisson 1, ce qui a pour effet de freiner fortement le moteur dont les moyens de détection détectent une surconsommation de courant, ce qui a pour effet de couper l'alimentation du moteur.Stopping the blind in the fully rolled up position is ensured by the abutment of the packet of blades of the blind against the box 1, which has the effect of strongly braking the motor, the detection means of which detect an overconsumption of current, which has the effect of cutting off the power to the motor.

Selon une variante d'exécution, la vis 17 est remplacée par une simple vis radiale, de préférence une vis pointeau. Dans ce cas, le réglage du point d'arrêt bas, de manière à obtenir un peu plus de déroulement, peut être exécuté d'une autre manière. La vis pointeau étant desserrée, le moteur est actionné. Bien que l'écrou baladeur 7 soit en butée contre le fond de la cage 9, la vis 6 peut tourner en entraînant la cage 9. Lorsque la position d'arrêt souhaité est atteinte, on coupe l'alimentation du moteur et on bloque la cage 9 au moyen de la vis pointeau.According to an alternative embodiment, the screw 17 is replaced by a simple radial screw, preferably a needle screw. In this case, the low breakpoint setting, in order to obtain a little more unwinding, can be executed in another way. With the needle screw loose, the motor is started. Although the sliding nut 7 is in abutment against the bottom of the cage 9, the screw 6 can turn by driving the cage 9. When the desired stop position is reached, the power supply to the motor is cut and the cage 9 using the needle screw.

Pour obtenir moins de déroulement, on commence par enrouler les cordons au moyen du moteur de manière à amener le store dans une position légèrement supérieure à la position d'arrêt bas désirée, comme précédemment.To obtain less unwinding, we start by winding the cords by means of the motor so as to bring the blind to a position slightly higher than the desired low stop position, as previously.

Dans cette variante à vis pointeau, la cage 9 débloquée pourrait être entraînée manuellement en rotation à travers une découpe prévue dans le caisson. L'entraînement pourrait être direct ou par l'intermédiaire d'une molette.In this variant with a needle screw, the unlocked cage 9 could be manually rotated through a cutout provided in the box. The drive could be direct or via a wheel.

La cage 9 en forme de pot constitue en outre un carter antipoussière qui protège la vis 6 et son écrou baladeur. Il s'est en effet produit, dans des dispositifs connus, que la poussière perturbe le fonctionnement du dispositif d'arrêt automatique.The cage 9 in the form of a pot also constitutes a dust-proof casing which protects the screw 6 and its sliding nut. It has indeed occurred, in known devices, that the dust disturbs the operation of the automatic stop device.

Claims (4)

Dispositif d'enroulement de cordons ou de rubans de store vénitien ou plissé comprenant, logés dans un caisson (1), un moteur électrique (2) équipé d'un frein, un réducteur, au moins un arbre de sortie (3, 4) entraînant deux tambours d'enroulement (12, 14) sur lesquels s'enroulent les cordons (13, 15), respectivement les rubans, du store, des moyens d'arrêt automatique lorsque le store est complètement enroulé, des moyens d'arrêt automatique lorsque le store a atteint un état de déroulement désiré, des moyens de détection d'un blocage du moteur provoquant l'arrêt du moteur lors de la détection d'un tel blocage et des moyens de réglage du point d'arrêt bas correspondant à l'état de déroulement désiré, caractérisé en ce que les moyens d'arrêt du store dans la position de déroulement désirée sont constitués d'une vis (6) montée coaxialement et solidaire en rotation avec ledit arbre de sortie (4, 11) dans une cage cylindrique (9) immobilisée en rotation dans le caisson par des moyens de blocage (17) actionnables manuellement et d'un écrou baladeur (7) monté sur la vis et immobilisé en rotation dans ladite cage, l'arrêt du moteur en position complètement enroulée du store étant assuré par la venue en butée du store contre le caisson et la détection d'un blocage du moteur et l'arrêt du store au point d'arrêt bas étant assuré par la venue en butée de l'écrou baladeur (7) contre une butée solidaire de la cage (9), et la détection d'un blocage du moteur, le réglage du point d'arrêt bas s'effectuant par le déblocage de ladite cage et son entraînement en rotation.Device for winding cords or ribbons of a Venetian or pleated blind comprising, housed in a box (1), an electric motor (2) equipped with a brake, a reduction gear, at least one output shaft (3, 4) driving two winding drums (12, 14) on which are wound the cords (13, 15), respectively the ribbons, of the awning, automatic stop means when the blind is fully wound, automatic stop means when the blind has reached a desired unwinding state, means for detecting a blockage of the motor causing the motor to stop when this blockage is detected and means for adjusting the low stopping point corresponding to the 'desired unwinding state, characterized in that the means for stopping the blind in the desired unwinding position consist of a screw (6) mounted coaxially and integral in rotation with said output shaft (4, 11) in a cylindrical cage (9) immobilized in rotation d in the casing by locking means (17) which can be actuated manually and by a sliding nut (7) mounted on the screw and immobilized in rotation in said cage, the stopping of the motor in the fully rolled up position of the blind being ensured by the coming in abutment of the blind against the box and the detection of a blockage of the motor and the stopping of the blind at the low stopping point being ensured by the abutment of the sliding nut (7) against a stop integral with the cage (9), and the detection of an engine blockage, the adjustment of the low stopping point being effected by the unlocking of said cage and its rotation drive. Dispositif d'enroulement selon la revendication 1, caractérisé en ce que les moyens de blocage de la cage (7) en rotation dans le caisson sont constitués d'une vis d'engrenage transversale (17) engrenant avec une denture hélicoïdale (16) de la cage, ladite vis constituant simultanément le moyen de réglage du point d'arrêt bas.Winding device according to claim 1, characterized in that the cage locking means (7) in rotation in the box consist of a transverse gear screw (17) meshing with a helical toothing (16) of the cage, said screw simultaneously constituting the means for setting the bottom breakpoint. Dispositif d'enroulement selon la revendication 1, caractérisé en ce que les moyens de blocage de la cage en rotation dans le caisson sont constitués d'une vis s'étendant radialement relativement à la cage, le réglage du point bas s'effectuant par le déblocage de la cage et son entraînement en rotation, en particulier au moyen du moteur.Winding device according to claim 1, characterized in that the means for locking the cage in rotation in the box consist of a screw extending radially relative to the cage, the adjustment of the low point being effected by the release of the cage and its rotation drive, in particular by means of the motor. Dispositif d'enroulement selon l'une des revendications 1 à 3, caractérisé en ce que la cage (9) est en forme de pot et que ladite butée fixe est constituée par le fond de la cage.Winding device according to one of claims 1 to 3, characterized in that the cage (9) is in the form of a pot and that said fixed stop is constituted by the bottom of the cage.
EP96810355A 1995-06-21 1996-06-03 Roll-up device for venetian blinds Expired - Lifetime EP0750092B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9507406 1995-06-21
FR9507406A FR2735812B1 (en) 1995-06-21 1995-06-21 MOTORIZED WINDING DEVICE FOR VENETIAN BLINDS

Publications (2)

Publication Number Publication Date
EP0750092A1 true EP0750092A1 (en) 1996-12-27
EP0750092B1 EP0750092B1 (en) 2000-09-27

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EP96810355A Expired - Lifetime EP0750092B1 (en) 1995-06-21 1996-06-03 Roll-up device for venetian blinds

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US (1) US5699847A (en)
EP (1) EP0750092B1 (en)
JP (1) JP3481776B2 (en)
DE (1) DE69610463T2 (en)
ES (1) ES2104539T1 (en)
FR (1) FR2735812B1 (en)

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CN101936124A (en) * 2010-08-16 2011-01-05 李七妹 Device for preventing back rolling of roller shutter cloth for roller shutter
CN101139909B (en) * 2007-10-24 2012-03-21 朱晓荧 Suspension type reel spindle window curtain

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CN101936124B (en) * 2010-08-16 2012-04-18 李七妹 Device for preventing back rolling of roller shutter cloth for roller shutter

Also Published As

Publication number Publication date
FR2735812A1 (en) 1996-12-27
EP0750092B1 (en) 2000-09-27
US5699847A (en) 1997-12-23
DE69610463D1 (en) 2000-11-02
FR2735812B1 (en) 1997-08-22
DE69610463T2 (en) 2001-05-10
JP3481776B2 (en) 2003-12-22
JPH0925776A (en) 1997-01-28
ES2104539T1 (en) 1997-10-16

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