EP0554212A1 - Winding mechanism for the suspension cords of a venetian blind - Google Patents

Winding mechanism for the suspension cords of a venetian blind Download PDF

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Publication number
EP0554212A1
EP0554212A1 EP93810025A EP93810025A EP0554212A1 EP 0554212 A1 EP0554212 A1 EP 0554212A1 EP 93810025 A EP93810025 A EP 93810025A EP 93810025 A EP93810025 A EP 93810025A EP 0554212 A1 EP0554212 A1 EP 0554212A1
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EP
European Patent Office
Prior art keywords
cord
diameter
drum
winding
shoulder
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
EP93810025A
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German (de)
French (fr)
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EP0554212B1 (en
Inventor
Jean De Chevron Villette
Jean-Michel Perache
Castraz Marc Joseph Antoine Quezel
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Somfy SA
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Somfy SA
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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
    • E06B9/24—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
    • E06B9/323—Structure or support of upper box
    • 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
    • E06B2009/3225—Arrangements to aid the winding of cords rollers

Definitions

  • the subject of the invention is a device for winding a blind suspension cord comprising a winding drum, to which the end of at least one suspension cord is fixed, and means for winding the cord in regular turns without overlapping.
  • the blinds whether they are fabrics, Venetian blinds, pleated blinds or other, generally have two hanging cords, one end of which is fixed to the winding drum and the other end of which is fixed to the free end. of the awning.
  • two hanging cords one end of which is fixed to the winding drum and the other end of which is fixed to the free end. of the awning.
  • the axially displaceable winding drum has at one end a threaded part.
  • a corresponding threaded part must be provided on its support.
  • an arrangement must be provided to allow both the drive in rotation and the translation induced by the threaded parts. All this is a source of complications and additional costs.
  • the spaces necessary for axial movement must be left free and in certain embodiments (CH 400 816) they constitute dead spaces which increase the size of the blind support.
  • the invention aims to overcome the aforementioned drawbacks.
  • the winding device is characterized in that said means for winding the cord in regular turns without overlapping consist, on the one hand, of a portion of smooth drum and of diameter greater than initial diameter of the winding drum and located at a distance from the point of attachment of the cord, this portion of larger diameter being limited, on the side opposite to the point of attachment of the cord, by a shoulder, and, on the other hand, by means for guiding the cord arranged so as to bring the cord to be wound on the portion of larger diameter at least approximately against said shoulder, so that the turns formed on the portion of larger diameter are repelled by the turning coil under the effect of the load and the reaction of the shoulder on the bead, the length of the portion of larger diameter being such that in the turns leaving this portion of larger diameter the traction on the bead is zero.
  • the effective length of the part of larger diameter certainly depends on the coefficient of friction of the bead on this part, that is to say of the materials and the surface conditions, but this length is not a precise and critical length, of so that it is easily obtained by a few tries.
  • Figure 1 is a schematic view of a blind winding drum.
  • Figure 2 is a partial view showing a first embodiment of the cord winding means in regular turns, in the fully unrolled position.
  • FIG. 3 shows the same means at the beginning of the winding.
  • Figure 4 shows the same means after several turns of the winding drum.
  • Figure 5 shows a means of fixing the end of the cord on the winding drum.
  • FIG. 6 is a detail view, in section along VI-VI of FIG. 5.
  • FIG. 7 shows a second embodiment of the winding means.
  • Figure 1 schematically shows a winding drum 1 mounted in a box 2 closed at its ends by two end pieces 3 and 4 between which is mounted the winding drum 1.
  • the drum 1 On the side of the end piece 4, the drum 1 is mounted by means of a drive motor 5.
  • the drum 1 On the drum 1 are wound two blind cords (not shown), the regular winding of which is ensured by two devices 6 and 7.
  • Figure 2 It consists of an auxiliary drum 8 of diameter greater than the diameter of the winding drum 1 and mounted on the drum 1.
  • This auxiliary drum 8 is limited on one side by a shoulder 9 extending radially to the auxiliary drum 8.
  • the device further comprises a guide 10 guiding the suspension cord 11 penetrating into the box 2 substantially radially to the winding drum and tangentially to the lateral face of the shoulder 9.
  • the cord 11 is fixed by the 'one of its ends at a point 12 of the winding drum 1, at a certain distance from the auxiliary drum 8.
  • the diameter of the auxiliary drum 8 is slightly less than the diameter of the drum 1 increased by twice the diameter of the cord 11. Quant at the length of the auxiliary drum 8, it is determined by the effect which it is desired to obtain and which will be described below.
  • the length of the auxiliary drum 8 is chosen so that in the turns 11b leaving the auxiliary drum, the traction on the cord is zero, such so that the turns 11b which continue to be pushed back by the turns in formation on the auxiliary drum 8 are floating and come to align without resistance on the winding drum 1 of initial diameter.
  • the length of the auxiliary drum 8 must therefore reach a minimum value so that the traction on the turns 11b is zero. This length can however exceed this minimum value without compromising the proper functioning of the device.
  • the unwinding is carried out like a wire on a spool.
  • the end 12 of the cord 11 can be fixed on the winding drum 1 as shown in FIGS. 5 and 6.
  • the cord 11 is fixed by means of a split ring 13 tightly enclosing the winding drum 1.
  • This split ring 13 has a slot 14 allowing the passage of the cord and a notch 15 facing the drum and the bottom of which pinches the cord 11 against the drum 1.
  • the end of the cord is also provided by a knot.
  • the fixing ring 13 makes it possible to immobilize the cord in any position as a function of the length of the cord to be wound up and also to immobilize cords of different diameters.
  • the auxiliary drum 8 ' is connected to the diameter of the winding drum 1 by a conical portion 8'a which has the effect of making the axial movement of the turns 11b more regular.
  • the shoulder 9 ′ has a conical lateral face 9 ′ a which allows better steering the arrival of the cord 11 on the auxiliary drum 8 '.
  • the junction between the conical face 9'a and the auxiliary drum 8 ' is achieved by a rounded 16 whose radius is substantially equal to the radius of the section of the cord. This choice turned out to be particularly favorable for the operation of the device.
  • the guide 10 came in one piece with a cradle 14 in which the drum rotates.
  • the cradle 14 may be common with that of the device for orienting the blades of a Venetian blind.
  • the device is very flexible in use since it can accept without modification large values of length of cord to be wound, therefore blinds of different heights. It is enough to move the point of attachment 12 of the cord on the drum 1. There is no risk of interference between the cord and the laces for orienting the blades of a venetian blind, since there is no translational movement of the drum and that the two devices are naturally perfectly separated. It is also easy to link the drums of several blinds that one would like to control by the same motor by a simple gimbal type connection.
  • the drum 1 has a diameter of 28 mm and the auxiliary drum 8 a diameter of 29.5 mm over a length of 2.53 mm followed by a conical part.
  • the auxiliary drum is in DELRIN (registered trademark) and the cord is in nylon and has a diameter of 1.2 mm.
  • the cylindrical part of the auxiliary drum 8 can be connected to the winding drum 1 by surfaces of different shapes.
  • This surface can be by example spherical or in the form of a body of revolution generated by an arc of a circle tangent to the cylindrical part of the auxiliary drum or by any approaching curve.
  • the diameter of the cylindrical part of the auxiliary drum is preferably between the diameter of the winding drum increased by the diameter of the cord and the diameter of the drum 1 increased by twice the diameter of the cord.
  • Parts 1, 8 and 9 can be in one piece.
  • the cord does not necessarily have to reach the drum radially.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Ropes Or Cables (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

The mechanism comprises a winding reel (1) on which is fixed one end of the cord to be wound. This reel comprises a smooth part (8) of greater diameter than the initial diameter of the reel (1), situated at a distance from the point of attachment (12) of the cord and limited by a shoulder (9). The cord (11) to be wound is guided approximately tangentially to this shoulder in such a way that the windings (11a) formed on the part of greater diameter are pushed back by the shoulder (9) under the effect of the load, the length of the part of greater diameter (8) being such that, in the windings (11b) leaving this part of greater diameter, the traction on the cord is zero. These loose windings position themselves alongside one another on the part (1) of the reel ensuring a uniform winding without overlapping of the cord. <IMAGE>

Description

L'invention a pour objet un dispositif d'enroulement de cordon de suspension de store comprenant un tambour d'enroulement, sur lequel est fixée l'extrémité d'au moins un cordon de suspension, et des moyens pour assurer un enroulement du cordon en spires régulières sans chevauchement.The subject of the invention is a device for winding a blind suspension cord comprising a winding drum, to which the end of at least one suspension cord is fixed, and means for winding the cord in regular turns without overlapping.

Les stores, qu'il s'agisse de toiles, de stores vénitiens, de stores plissés ou autres, comportent généralement deux cordons de suspension dont une extrémité est fixée au tambour d'enroulement et l'autre extrémité est fixée à l'extrémité libre du store. Afin d'assurer un enroulement et un déroulement régulier du store, c'est-à-dire une descente et une montée égales des deux côtés du store, pour des raisons d'esthétique et des raisons mécaniques (risque de coincement) il est nécessaire d'assurer un enroulement régulier des deux cordons de suspension sur le tambour d'enroulement, en spires régulières, sans chevauchement. A cet effet, il est connu d'animer le tambour d'enroulement d'un mouvement de translation simultané au mouvement de rotation et d'amplitude telle que cette translation soit au moins égale à la valeur de diamètre du cordon par tour de tambour. De telles réalisations sont décrites dans les brevets FR 1 234 045, FR 1 319 645, CH 400 816 CH 408 694 et EP 380 346. Le tambour d'enroulement déplaçable axialement comporte à une extrémité une partie filetée. Une partie filetée correspondante doit être prévue sur son support. De l'autre côté, réservé à son entraînement, un aménagement doit être prévu pour permettre à la fois l'entraînement en rotation et la translation induite par les parties filetées. Tout ceci est source de complications et de surcoûts. De plus, les espaces nécessaires au déplacement axial doivent être laissés libres et dans certaines réalisations (CH 400 816) ils constituent des espaces morts qui augmentent l'encombrement du support du store.The blinds, whether they are fabrics, Venetian blinds, pleated blinds or other, generally have two hanging cords, one end of which is fixed to the winding drum and the other end of which is fixed to the free end. of the awning. In order to ensure a regular winding and unwinding of the blind, that is to say an equal descent and rise on both sides of the blind, for aesthetic reasons and mechanical reasons (risk of jamming) it is necessary ensure a regular winding of the two suspension cords on the winding drum, in regular turns, without overlapping. To this end, it is known to animate the winding drum with a movement of translation simultaneous with the movement of rotation and of amplitude such that this translation is at least equal to the value of the diameter of the cord per revolution of the drum. Such embodiments are described in patents FR 1 234 045, FR 1 319 645, CH 400 816 CH 408 694 and EP 380 346. The axially displaceable winding drum has at one end a threaded part. A corresponding threaded part must be provided on its support. On the other side, reserved for its drive, an arrangement must be provided to allow both the drive in rotation and the translation induced by the threaded parts. All this is a source of complications and additional costs. In addition, the spaces necessary for axial movement must be left free and in certain embodiments (CH 400 816) they constitute dead spaces which increase the size of the blind support.

En outre, dans les stores vénitiens équipés d'un dispositif d'orientation des lames, il est nécessaire de prévoir des aménagements pour ne pas risquer, en fonctionnement, une interférence entre les spires du cordon de suspension et les lacettes du dispositif d'orientation. Dans le brevet CH 400 816 le dispositif d'orientation est isolé dans un berceau. Dans le brevet français 1 319 645 il est prévu soit une bague ou une cloison. Dans le brevet EP 380 346, un berceau permet d'isoler l'échelle et son mécanisme entre deux bagues, ce qui a pour effet d'engendrer un frottement permanent de translation, source d'usure et de bruit.In addition, in venetian blinds fitted with a slat orientation device, it is necessary to provide arrangements so as not to risk, in operation, interference between the turns of the suspension cord and the laces of the orientation device . In patent CH 400 816 the orientation device is isolated in a cradle. In French patent 1,319,645 there is provided either a ring or a partition. In patent EP 380 346, a cradle makes it possible to isolate the ladder and its mechanism between two rings, which has the effect of generating a permanent friction of translation, source of wear and noise.

Enfin, lorsqu'on souhaite disposer plusieurs stores côte à côte, par exemple pour équiper des fenêtres disposées en encorbellement et bénéficier du moteur d'entraînement de l'un d'eux pour l'ensemble des stores, il est quasiment impossible de réaliser une liaison cinématique simple entre les tambours des différents stores.Finally, when you want to have several blinds side by side, for example to equip windows arranged in cantilever and benefit from the drive motor of one of them for all the blinds, it is almost impossible to perform a simple kinematic link between the drums of the different blinds.

L'invention a pour but d'obvier aux inconvénients susmentionnés.The invention aims to overcome the aforementioned drawbacks.

A cet effet, le dispositif d'enroulement selon l'invention est caractérisé en ce que lesdits moyens pour assurer un enroulement du cordon en spires régulières sans chevauchement sont constitués, d'une part, par une partie de tambour lisse et de diamètre supérieur au diamètre initial du tambour d'enroulement et située à distance du point de fixation du cordon, cette partie de diamètre supérieur étant limitée, du côté opposé au point de fixation du cordon, par un épaulement, et, d'autre part, par des moyens de guidage du cordon disposés de manière à amener le cordon à enrouler sur la partie de diamètre supérieur au moins approximativement contre ledit épaulement, de telle sorte que les spires formées sur la partie de diamètre supérieur sont repoussées par la spire en formation sous l'effet de la charge et de la réaction de l'épaulement sur le cordon, la longueur de la partie de diamètre supérieur étant telle que dans les spires quittant cette partie de diamètre supérieur la traction sur le cordon est nulle.To this end, the winding device according to the invention is characterized in that said means for winding the cord in regular turns without overlapping consist, on the one hand, of a portion of smooth drum and of diameter greater than initial diameter of the winding drum and located at a distance from the point of attachment of the cord, this portion of larger diameter being limited, on the side opposite to the point of attachment of the cord, by a shoulder, and, on the other hand, by means for guiding the cord arranged so as to bring the cord to be wound on the portion of larger diameter at least approximately against said shoulder, so that the turns formed on the portion of larger diameter are repelled by the turning coil under the effect of the load and the reaction of the shoulder on the bead, the length of the portion of larger diameter being such that in the turns leaving this portion of larger diameter the traction on the bead is zero.

Par des moyens très simples, on peut ainsi obtenir un enroulement tel que les spires quittant le diamètre supérieur du tambour d'enroulement sont flottantes et soumises exclusivement à la poussée des spires enroulées sur la partie de diamètre supérieur et s'alignent sans résistance, comme des anneaux, sur le tambour de diamètre initial.By very simple means, it is thus possible to obtain a winding such that the turns leaving the upper diameter of the winding drum are floating and subjected exclusively to the thrust of the turns wound on the part of larger diameter and align without resistance, as rings, on the initial diameter drum.

La longueur efficace de la partie de diamètre supérieur dépend certes du coefficient de frottement du cordon sur cette partie, c'est-à-dire des matériaux et des états de surface, mais cette longueur n'est pas une longueur précise et critique, de sorte qu'on l'obtient facilement par quelques essais.The effective length of the part of larger diameter certainly depends on the coefficient of friction of the bead on this part, that is to say of the materials and the surface conditions, but this length is not a precise and critical length, of so that it is easily obtained by a few tries.

Le dessin annexé représente, à titre d'exemple, deux modes d'exécution de l'invention.The accompanying drawing shows, by way of example, two embodiments of the invention.

La figure 1 est une vue schématique d'un tambour d'enroulement de store.Figure 1 is a schematic view of a blind winding drum.

La figure 2 est une vue partielle représentant un premier mode d'exécution des moyens d'enroulement du cordon en spires régulières, en position complètement déroulée.Figure 2 is a partial view showing a first embodiment of the cord winding means in regular turns, in the fully unrolled position.

La figure 3 représente les mêmes moyens au commencement de l'enroulement.Figure 3 shows the same means at the beginning of the winding.

La figure 4 représente les mêmes moyens après plusieurs tours du tambour d'enroulement.Figure 4 shows the same means after several turns of the winding drum.

La figure 5 représente un moyen de fixation de l'extrémité du cordon sur le tambour d'enroulement.Figure 5 shows a means of fixing the end of the cord on the winding drum.

La figure 6 est une vue de détail, en coupe selon VI-VI de la figure 5.FIG. 6 is a detail view, in section along VI-VI of FIG. 5.

La figure 7 représente un second mode d'exécution des moyens d'enroulement.FIG. 7 shows a second embodiment of the winding means.

La figure 1 représente schématiquement un tambour d'enroulement 1 monté dans un caisson 2 fermé à ses extrémités par deux embouts 3 et 4 entre lesquels est monté le tambour d'enroulement 1. Du côté de l'embout 4, le tambour 1 est monté par l'intermédiaire d'un moteur d'entraînement 5. Sur le tambour 1 s'enroulent deux cordons de store (non représenté) dont l'enroulement régulier est assuré par deux dispositifs 6 et 7.Figure 1 schematically shows a winding drum 1 mounted in a box 2 closed at its ends by two end pieces 3 and 4 between which is mounted the winding drum 1. On the side of the end piece 4, the drum 1 is mounted by means of a drive motor 5. On the drum 1 are wound two blind cords (not shown), the regular winding of which is ensured by two devices 6 and 7.

L'un de ces dispositifs est représenté à la figure 2. Il est constitué d'un tambour auxiliaire 8 de diamètre supérieur au diamètre du tambour d'enroulement 1 et monté sur le tambour 1. Ce tambour auxiliaire 8 est limité d'un côté par un épaulement 9 s'étendant radialement au tambour auxiliaire 8. Le dispositif comprend en outre un guide 10 guidant le cordon de suspension 11 pénétrant dans le caisson 2 sensiblement radialement au tambour d'enroulement et tangentiellement à la face latérale de l'épaulement 9. Le cordon 11 est fixé par l'une de ses extrémités en un point 12 du tambour d'enroulement 1, à une certaine distance du tambour auxiliaire 8. Le diamètre du tambour auxiliaire 8 est légèrement inférieur au diamètre du tambour 1 augmenté de deux fois le diamètre du cordon 11. Quant à la longueur du tambour auxiliaire 8, elle est déterminée par l'effet que l'on désire obtenir et qui sera décrit ci-après.One of these devices is shown in Figure 2. It consists of an auxiliary drum 8 of diameter greater than the diameter of the winding drum 1 and mounted on the drum 1. This auxiliary drum 8 is limited on one side by a shoulder 9 extending radially to the auxiliary drum 8. The device further comprises a guide 10 guiding the suspension cord 11 penetrating into the box 2 substantially radially to the winding drum and tangentially to the lateral face of the shoulder 9. The cord 11 is fixed by the 'one of its ends at a point 12 of the winding drum 1, at a certain distance from the auxiliary drum 8. The diameter of the auxiliary drum 8 is slightly less than the diameter of the drum 1 increased by twice the diameter of the cord 11. Quant at the length of the auxiliary drum 8, it is determined by the effect which it is desired to obtain and which will be described below.

Lorsque le cordon 11 est enroulé sous charge, à partir de la position représentée à la figure 2, il commence à s'enrouler autour du tambour auxiliaire 8 comme représenté à la figure 3. Les premières spires se forment sur le tambour 8 et très rapidement viennent en contact avec l'épaulement 9. A partir de cet instant, la spire en formation sur le tambour auxiliaire 8 cherche à s'insérer entre l'épaulement 9 et la spire qui vient d'être formée et cette dernière est repoussée sous l'effet de la réaction de l'épaulement 9 sur la spire en formation. La spire repoussée pousse à son tour les autres spires 11a déjà formées sur le tambour auxiliaire 8. La longueur du tambour auxiliaire 8 est choisie de telle sorte que dans les spires 11b quittant le tambour auxiliaire, la traction sur le cordon est nulle, de telle sorte que les spires 11b qui continuent d'être repoussées par les spires en formation sur le tambour auxiliaire 8 sont flottantes et viennent s'aligner sans résistance sur le tambour d'enroulement 1 de diamètre initial. Cette annulation de la force de traction sur le cordon dans les spires 11b, résulte de l'addition des forces de frottement dans les spires successives 11a formées sur le tambour auxiliaire 8. Il est ainsi possible d'enrouler le cordon en spires régulières sur le tambour d'enroulement 1 de manière illimitée, et en particulier jusqu'à ce que le cordon 11 soit complètement enroulé.When the cord 11 is wound under load, from the position shown in Figure 2, it begins to wind around the auxiliary drum 8 as shown in Figure 3. The first turns are formed on the drum 8 and very quickly come into contact with the shoulder 9. From this instant, the coil in formation on the auxiliary drum 8 seeks to be inserted between the shoulder 9 and the coil which has just been formed and the latter is pushed back under the effect of the reaction of the shoulder 9 on the whorl in formation. The repelled turn in turn pushes the other turns 11a already formed on the auxiliary drum 8. The length of the auxiliary drum 8 is chosen so that in the turns 11b leaving the auxiliary drum, the traction on the cord is zero, such so that the turns 11b which continue to be pushed back by the turns in formation on the auxiliary drum 8 are floating and come to align without resistance on the winding drum 1 of initial diameter. This cancellation of the pulling force on the cord in the turns 11b, results from the addition of the friction forces in the successive turns 11a formed on the auxiliary drum 8. It is thus possible to wind the cord in regular turns on the winding drum 1 in an unlimited manner, and in particular until the cord 11 is completely wound.

On comprend que la longueur du tambour auxiliaire 8 doit donc atteindre une valeur minimale pour que la traction sur les spires 11b soit nulle. Cette longueur peut toutefois dépasser cette valeur minimale sans compromettre le bon fonctionnement du dispositif.It is understood that the length of the auxiliary drum 8 must therefore reach a minimum value so that the traction on the turns 11b is zero. This length can however exceed this minimum value without compromising the proper functioning of the device.

Le déroulement s'effectue à la manière d'un fil sur une bobine. Les spires étant régulièrement enroulées, le déroulement s'effectue de façon régulière.The unwinding is carried out like a wire on a spool. The turns being regularly wound, the unwinding takes place regularly.

L'extrémité 12 du cordon 11 peut être fixée sur le tambour d'enroulement 1 comme représenté aux figures 5 et 6. Le cordon 11 est fixé au moyen d'une bague fendue 13 enserrant fortement le tambour d'enroulement 1. Cette bague fendue 13 présente une fente 14 permettant le passage du cordon et une encoche 15 tournée vers le tambour et dont le fond vient pincer le cordon 11 contre le tambour 1. L'extrémité du cordon est en outre assurée par un noeud. La bague de fixation 13 permet d'immobiliser le cordon à une position quelconque en fonction de la longueur du cordon à enrouler et également d'immobiliser des cordons de diamètres différents.The end 12 of the cord 11 can be fixed on the winding drum 1 as shown in FIGS. 5 and 6. The cord 11 is fixed by means of a split ring 13 tightly enclosing the winding drum 1. This split ring 13 has a slot 14 allowing the passage of the cord and a notch 15 facing the drum and the bottom of which pinches the cord 11 against the drum 1. The end of the cord is also provided by a knot. The fixing ring 13 makes it possible to immobilize the cord in any position as a function of the length of the cord to be wound up and also to immobilize cords of different diameters.

Selon la seconde forme d'exécution représentée à la figure 7, le tambour auxiliaire 8' est raccordé au diamètre du tambour d'enroulement 1 par une partie conique 8'a qui a pour effet de rendre plus régulier le déplacement axial des spires 11b. L'épaulement 9' présente une face latérale conique 9'a qui permet de mieux diriger l'arrivée du cordon 11 sur le tambour auxiliaire 8'. La jonction entre la face conique 9'a et le tambour auxiliaire 8' est réalisée par un arrondi 16 dont le rayon est sensiblement égal au rayon de la section du cordon. Ce choix s'est avéré particulièrement favorable au fonctionnement du dispositif. Le guide 10 est venu d'une pièce avec un berceau 14 dans lequel tourne le tambour.According to the second embodiment shown in Figure 7, the auxiliary drum 8 'is connected to the diameter of the winding drum 1 by a conical portion 8'a which has the effect of making the axial movement of the turns 11b more regular. The shoulder 9 ′ has a conical lateral face 9 ′ a which allows better steering the arrival of the cord 11 on the auxiliary drum 8 '. The junction between the conical face 9'a and the auxiliary drum 8 'is achieved by a rounded 16 whose radius is substantially equal to the radius of the section of the cord. This choice turned out to be particularly favorable for the operation of the device. The guide 10 came in one piece with a cradle 14 in which the drum rotates.

Le berceau 14 peut être commun avec celui du dispositif d'orientation des lames d'un store vénitien.The cradle 14 may be common with that of the device for orienting the blades of a Venetian blind.

Le dispositif est très souple d'usage puisqu'il peut accepter sans modification de grandes valeurs de longueur de cordon à enrouler, donc des stores de différentes hauteurs. Il suffit de déplacer le point de fixation 12 du cordon sur le tambour 1. Il n'y a aucun risque d'interférence entre le cordon et les lacettes d'orientation des lames d'un store vénitien, puisqu'il n'y a aucun mouvement de translation du tambour et que les deux dispositifs sont naturellement parfaitement séparés. Il est également aisé de lier les tambours de plusieurs stores que l'on souhaiterait commander par un même moteur par une simple liaison de type cardan.The device is very flexible in use since it can accept without modification large values of length of cord to be wound, therefore blinds of different heights. It is enough to move the point of attachment 12 of the cord on the drum 1. There is no risk of interference between the cord and the laces for orienting the blades of a venetian blind, since there is no translational movement of the drum and that the two devices are naturally perfectly separated. It is also easy to link the drums of several blinds that one would like to control by the same motor by a simple gimbal type connection.

Selon un exemple d'exécution, le tambour 1 présente un diamètre de 28 mm et le tambour auxiliaire 8 un diamètre de 29,5 mm sur une longueur de 2,53 mm suivie d'une partie conique. Le tambour auxiliaire est en DELRIN (marque déposée) et le cordon est en nylon et présente un diamètre de 1,2 mm.According to an exemplary embodiment, the drum 1 has a diameter of 28 mm and the auxiliary drum 8 a diameter of 29.5 mm over a length of 2.53 mm followed by a conical part. The auxiliary drum is in DELRIN (registered trademark) and the cord is in nylon and has a diameter of 1.2 mm.

La partie cylindrique du tambour auxiliaire 8 peut être raccordée au tambour d'enroulement 1 par des surfaces de différentes formes. Cette surface peut être par exemple sphérique ou en forme de corps de révolution engendré par un arc de cercle tangeant à la partie cylindrique du tambour auxiliaire ou par toute courbe approchante.The cylindrical part of the auxiliary drum 8 can be connected to the winding drum 1 by surfaces of different shapes. This surface can be by example spherical or in the form of a body of revolution generated by an arc of a circle tangent to the cylindrical part of the auxiliary drum or by any approaching curve.

Le diamètre de la partie cylindrique du tambour auxiliaire est de préférence compris entre le diamètre du tambour d'enroulement augmenté du diamètre du cordon et le diamètre du tambour 1 augmenté de deux fois le diamètre du cordon.The diameter of the cylindrical part of the auxiliary drum is preferably between the diameter of the winding drum increased by the diameter of the cord and the diameter of the drum 1 increased by twice the diameter of the cord.

Les parties 1, 8 et 9 peuvent être en une seule pièce. Le cordon ne doit pas obligatoirement arriver radialement sur le tambour.Parts 1, 8 and 9 can be in one piece. The cord does not necessarily have to reach the drum radially.

Claims (10)

Dispositif d'enroulement de cordon de suspension de store comprenant un tambour d'enroulement (1), sur lequel est fixée l'extrémité d'au moins un cordon de suspension (11) et des moyens pour assurer un enroulement du cordon en spires régulières sans chevauchement, caractérisé en ce que lesdits moyens sont constitués, d'une part, par une partie de tambour lisse (8; 8') de diamètre supérieur au diamètre initial du tambour d'enroulement (1) et située à distance du point de fixation (12) du cordon, cette partie de diamètre supérieur (8; 8') étant limitée, du côté opposé au point de fixation du cordon par un épaulement (9; 9'), et, d'autre part, par des moyens de guidage (10) du cordon disposés de manière à amener le cordon à enrouler sur la partie de diamètre supérieur au moins approximativement contre l'épaulement de telle sorte que les spires formées sur la partie de diamètre supérieur sont repoussées par la spire en formation sous l'effet de la charge et de la réaction de l'épaulement sur le cordon, la longueur de la partie de diamètre supérieur étant telle que dans les spires (11b) quittant cette partie de diamètre supérieur la traction sur le cordon est nulle.Device for winding a blind suspension cord comprising a winding drum (1), on which is fixed the end of at least one suspension cord (11) and means for ensuring the winding of the cord in regular turns without overlap, characterized in that said means consist, on the one hand, of a smooth drum part (8; 8 ') of diameter greater than the initial diameter of the winding drum (1) and located at a distance from the point of fastening (12) of the cord, this portion of larger diameter (8; 8 ') being limited, on the side opposite to the point of attachment of the cord by a shoulder (9; 9'), and, on the other hand, by means guide (10) of the cord arranged so as to bring the cord to be wound on the portion of larger diameter at least approximately against the shoulder so that the turns formed on the portion of larger diameter are repelled by the turning coil under the effect of the charge and of the reaction of the shoulder on the bead, the length of the portion of larger diameter being such that in the turns (11b) leaving this portion of larger diameter the traction on the bead is zero. Dispositif d'enroulement selon la revendication 1, caractérisé en ce que les moyens de guidage (10) du cordon amène le cordon sensiblement radialement sur le tambour.Winding device according to claim 1, characterized in that the guide means (10) of the cord brings the cord substantially radially onto the drum. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la face latérale de l'épaulement est plane et radiale.Device according to claim 1 or 2, characterized in that the lateral face of the shoulder is planar and radial. Dispositif d'enroulement selon la revendication 1 ou 2, caractérisé en ce que la face latérale de l'épaulement est conique.Winding device according to claim 1 or 2, characterized in that the lateral face of the shoulder is conical. Dispositif d'enroulement selon la revendication 4, caractérisée en ce que la face latérale conique (9'a) est reliée à la partie de tambour lisse (8') par un arrondi (16) dont le rayon est sensiblement égal au rayon de la section du cordon à enrouler.Winding device according to claim 4, characterized in that the conical side face (9'a) is connected to the smooth drum part (8 ') by a rounded (16) whose radius is substantially equal to the radius of the section of cord to be wound. Dispositif d'enroulement selon l'une des revendications 1 à 5, caractérisé en ce que l'extrémité de la partie de diamètre supérieur (8') est raccordée au diamètre initial du tambour d'enroulement (1) par une partie au moins approximativement conique (8'a).Winding device according to one of claims 1 to 5, characterized in that the end of the part with a larger diameter (8 ') is connected to the initial diameter of the winding drum (1) by a part at least approximately conical (8'a). Dispositif d'enroulement selon l'une des revendications 1 à 5, caractérisé en ce que l'extrémité de la partie de diamètre supérieur est raccordée au diamètre initial du tambour d'enroulement par une partie en forme de corps de révolution engendré par un arc de cercle ou une courbe approchante.Winding device according to one of Claims 1 to 5, characterized in that the end of the part with a larger diameter is connected to the initial diameter of the winding drum by a part in the form of a body of revolution generated by an arc. of a circle or an approaching curve. Dispositif d'enroulement selon l'une des revendications 1 à 5, caractérisé en ce que l'extrémité de la partie de diamètre supérieur est reliée au diamètre initial du tambour d'enroulement par une partie de surface au moins approximativement sphérique.Winding device according to one of claims 1 to 5, characterized in that the end of the part with a larger diameter is connected to the initial diameter of the winding drum by an at least approximately spherical surface part. Dispositif d'enroulement selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le diamètre de la partie de diamètre supérieur est comprise entre le diamètre du tambour (1) augmenté du diamètre du cordon et le diamètre du tambour (1) augmenté de deux fois le diamètre du cordon.Winding device according to any one of Claims 1 to 8, characterized in that the diameter of the part with a larger diameter is between the diameter of the drum (1) increased by the diameter of the cord and the diameter of the drum (1) increased the cord diameter twice. Dispositif d'enroulement selon l'une quelconque des revendications 1 à 9, caractérisé en ce que les moyens de guidage sont venus d'une pièce avec un berceau (14) supportant le tambour d'enroulement au niveau de l'épaulement (9') de la partie de diamètre supérieur.Winding device according to any one of Claims 1 to 9, characterized in that the guide means have come in one piece with a cradle (14) supporting the winding drum at the level of the shoulder (9 ' ) of the larger diameter portion.
EP93810025A 1992-01-30 1993-01-19 Winding mechanism for the suspension cords of a venetian blind Expired - Lifetime EP0554212B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9201036A FR2686934B1 (en) 1992-01-30 1992-01-30 DEVICE FOR WINDING STORE SUSPENSION CORD.
FR9201036 1992-01-30

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EP0554212A1 true EP0554212A1 (en) 1993-08-04
EP0554212B1 EP0554212B1 (en) 1997-03-26

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US (1) US5328113A (en)
EP (1) EP0554212B1 (en)
JP (1) JP3249617B2 (en)
KR (1) KR100255434B1 (en)
AT (1) ATE150840T1 (en)
DE (1) DE69309127T2 (en)
ES (1) ES2048718T3 (en)
FR (1) FR2686934B1 (en)

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US5540909A (en) * 1994-09-28 1996-07-30 Alliance Pharmaceutical Corp. Harmonic ultrasound imaging with microbubbles
US7464742B2 (en) 2002-12-19 2008-12-16 Hunter Douglas Industries Bv Raising and lowering mechanism for blinds
WO2005028801A1 (en) 2003-09-19 2005-03-31 Faber A/S A winding mechanism
EP1577483A1 (en) 2004-03-18 2005-09-21 MOTTURA S.p.A. Device for winding a suspension cord of a blind
EP1983143A1 (en) 2007-04-20 2008-10-22 Somfy SAS Device for winding a suspension cord comprising means for guiding the cord
CN101263969B (en) * 2008-04-29 2010-04-14 朱晓荧 Multifunctional curtain
FR2955606A1 (en) * 2010-01-25 2011-07-29 Mariton Slat blind operating device for window of professional or private dwelling, has driving unit for driving drum and pulley in rotation, and barrier that is arranged at level of groove to prevent loop out of groove during rotation of pulley
WO2011128028A2 (en) 2010-04-16 2011-10-20 Hunter Douglas Industries B.V. Conical cord-winding spool with circumferential steps

Also Published As

Publication number Publication date
JP3249617B2 (en) 2002-01-21
ATE150840T1 (en) 1997-04-15
US5328113A (en) 1994-07-12
EP0554212B1 (en) 1997-03-26
DE69309127D1 (en) 1997-04-30
FR2686934A1 (en) 1993-08-06
KR930016634A (en) 1993-08-26
ES2048718T3 (en) 1997-05-16
JPH05248156A (en) 1993-09-24
FR2686934B1 (en) 1994-04-15
DE69309127T2 (en) 1997-10-02
KR100255434B1 (en) 2000-05-01
ES2048718T1 (en) 1994-04-01

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