EP0500499B1 - Venetian blind - Google Patents

Venetian blind Download PDF

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Publication number
EP0500499B1
EP0500499B1 EP92810113A EP92810113A EP0500499B1 EP 0500499 B1 EP0500499 B1 EP 0500499B1 EP 92810113 A EP92810113 A EP 92810113A EP 92810113 A EP92810113 A EP 92810113A EP 0500499 B1 EP0500499 B1 EP 0500499B1
Authority
EP
European Patent Office
Prior art keywords
stop
piece
venetian blind
frame
ladder
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.)
Expired - Lifetime
Application number
EP92810113A
Other languages
German (de)
French (fr)
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EP0500499A1 (en
Inventor
Marc Joseph Antoine Quezel Castraz
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.)
Somfy SA
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Somfy SA
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Publication date
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Publication of EP0500499A1 publication Critical patent/EP0500499A1/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
    • E06B9/24—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
    • E06B9/24—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

Definitions

  • the subject of the present invention is a venetian blind comprising a winding shaft on which is mounted at least one winding drum on which is wound a lace fixed to the lower blade of the blind and passing through the other blades in their middle part, and a blade orientation mechanism comprising a pulley frictionally driving a flexible ladder whose ends of the strands are connected to two straps fixed to each of the edges of the blades to ensure the tilting of these blades in the closed position when the blind is fully extended , and a movable member positioned elastically and subjected to the action of the lace under the effect of the traction exerted on the lace by the lower terminal blade, this movable member controlling stop means holding the blades in a first inclination when they are operative and authorizing the tilting of the blades in a second inclination when they are inoperative.
  • the movable member consists of a pusher mounted at the end of an elastic arm parallel to the axis of the pulley and bending under the pressure of the lace wound on the pulley.
  • This pusher acts on a slide forming a retractable stop for one of the ends of a helical spring of a friction spring clutch, the relaxation of the lace having the effect of retracting this stop and allowing the clutch to '' drive the ladder at an angle determined by a fixed stop.
  • the orientation mechanism consists of approximately seven parts and is not symmetrical, i.e. it can only be used in one direction of rotation.
  • an orientation mechanism is also known, also comprising a bar elastically mounted parallel to the axis of the winding pulley and subjected to the action of the yoke, this bar being provided two radial pawls coming to drive the inner strand of the ladder by a trainer fixed on this strand, by tilting the blind blades in the closed position, when the bar is unloaded.
  • the bar also serves as a means of coupling the ladder drum to the winding pulley.
  • This mechanism has about seven parts and is not symmetrical.
  • the object of the present invention is to provide a simpler mechanism for orienting the blades than the known mechanisms and capable of being executed in a symmetrical shape, that is to say usable in both directions of rotation and the mounting of which is therefore independent of the orientation of the blind drive shaft.
  • the blind according to the invention is characterized in that the drum of the lace and the pulley of the ladder are integral, that the movable member positioned elastically consists of a part capable of moving in a horizontal plane in a direction transverse to the axis of the drum relative to a fixed frame having a central passage for the lace and two lateral passages controlled by the drawer, for each of the strands of the ladder, this movable part being traversed by the lace so that traction on the lace has the effect of moving said movable part against its elastic positioning means, and that the strands of the ladder are each provided with a stop piece, the dimensions of the lateral passages, of the pieces of the stopper and of the movable part being such that when the movable piece is stressed by the lace, the stopper pieces cannot pass through said lateral passages and the blades of the blind have the first inclination, while when the movable part is not stressed by the lace, the rising stop part can pass through the corresponding passage and allow the blades
  • the mechanism is very simple and symmetrical.
  • the absence of a moving part in the pulley makes it possible to pass a shaft of large section through the pulley and, in particular, to mount the pulley on a tubular motor.
  • the mechanism is preferably produced symmetrically relative to a vertical plane of symmetry parallel to the axis of the winding shaft, in particular passing through this axis.
  • the winding drum and the ladder pulley can be made in a single piece rotating in a cradle constituting the frame.
  • the complete mechanism consists of three parts plus one or two springs for positioning the moving part.
  • Figure 1 is a sectional view along I-I of Figure 2 showing the blind at the start of its rise phase.
  • Figure 2 is a sectional view along II-II of Figure 1.
  • FIG. 3 represents the drawer according to a sectional view along III-III of FIG. 2.
  • FIG. 4 represents an alternative embodiment of the drawer in a view similar to that of FIG. 3.
  • FIGS 5 to 9 show the same blind in different positions.
  • FIG. 10 represents a second embodiment according to a view similar to that of FIG. 2.
  • FIG. 11 is a partial view at the level of the drawer according to a section XI-XI of FIG. 10.
  • FIG. 12 represents an alternative embodiment of the part shown in FIG. 11.
  • Figure 13 is an elevational view of a particular embodiment of the end stop of the ladder, in the open position.
  • Figure 14 is a plan view of the same stopper in the open position.
  • Figure 15 is an elevational view of the same stopper in the closed position and arm inoperative position.
  • FIG. 16 is a plan view of the closed stop represented in FIG. 15.
  • Figure 17 shows the same stop with its arms in the operating position.
  • FIG. 18 represents an alternative embodiment of the first embodiment.
  • Figure 19 is a bottom view of an embodiment in one piece of the cradle and the drawer, in the rest position.
  • FIG. 20 represents the same execution in the working position seen in section along XX-XX of FIG. 21.
  • FIG. 21 is a partial view, in section along XXI-XXI of FIG. 20.
  • FIG. 22 represents a particular embodiment of the abutment pieces allowing a simplification of the embodiment represented in FIGS. 19 to 21.
  • the blind shown in Figures 1 to 3 comprises a rectangular metal box 1, partially shown in Figure 1, in which are mounted several winding and orientation units of the Venetian blind, only one of these units being shown in the drawing.
  • the box 1 is mounted in a recess 2 shown in phantom, with the exception of its lower edge 3.
  • the winding and orientation unit shown comprises a cradle 4 fixed to the box 1 and in which is housed in rotation a tubular part 5 of generally cylindrical shape having an axial passage of hexagonal shape intended for its fitting onto a tubular motor.
  • This part 5 has a central groove 7 constituting a winding drum for the lace 8 of the blind, a lace freely passing through, in a manner known per se, the intermediate blades 9 of the blind and attached to the lower end blade 10.
  • the part 5 also has two grooves 11 and 12 arranged on either side of the groove 7 and constituting two pulleys through which pass two bands 13 and 14, the ends of which are attached, in a manner known per se, to the ends of two straps 15 and 16 fixed, in a manner known per se, to each of the edges of each of the blades 9 and 10 of the blind. It is usual to speak of a ladder for all of the bands 13 and 14 and of the straps 15 and 16 and of a ladder holder for the bands 13 and 14. The ladder holder is driven by friction by the part 5 when it it is rotated.
  • the cradle 4 simultaneously constitutes a frame for a drawer 17, movable in translation, under the part 5, transversely to the axis of the drive shaft, in a horizontal plane.
  • This drawer 17 has a central passage 18 letting pass, with a slight play, the lace 8.
  • the drawer 17 On each side of the passage 18, symmetrically thereto, the drawer 17 has two rectangular passages 19 and 20 ( Figure 3).
  • the drawer 17 is further connected to the cradle 4 by two spring blades 21 and 22 which tend to keep the drawer in a central position, as shown in Figure 6, in the absence of transverse stress.
  • the cradle 4 Under the drawer 17, the cradle 4 has two rectangular passages 23 and 24 which may or may not coincide with the passages 19 and 20 of the drawer, depending on the position of the latter. Above the drawer 17, the cradle 4 has two housings 25 and 26 located opposite the passages 23 and 24.
  • stop pieces 27 and 28 are fixed in the form of a bar, the dimensions of which are such that they can pass through the passages of the cradle and of the drawer and enter the housings 25 and 26.
  • the drawer 17 'could be pivotally mounted about a vertical axis 29.
  • the passage for the lace 8 could consist of a slot 18'.
  • the drawer positioning spring could be mounted at the hinge pin 29.
  • Figure 5 shows the blind in the lowering position.
  • the blade 10 is suspended and exerts a pull on the lace 8 which has the effect of exerting on the drawer 17 a transverse force which moves the drawer 17 to the left against the action of its springs 21 and 22.
  • the passage 20 of the drawer is no longer opposite the passage 24 of the frame, which has the effect of partially closing this passage 24.
  • the part 5 rotating in the direction of the arrow the ladder holder is driven by friction in the same direction, so that its stop 27 descends and its stop 28 rises and engages in the passage 24 of the frame, but abuts against the drawer 17, determining a first inclination, relatively small, of the blades 9 of the blind.
  • the lace 8 relaxes and releases the drawer 17 which returns to its middle position under the effect of its springs. In this position, the passages of the drawer coincide with the passages of the frame.
  • the part 5 When the blind is raised, the part 5 is driven in the direction of the arrow according to FIG. 8.
  • the ladder holder is driven in the other direction and its stop 28 passes through the drawer 17 in the direction of the bottom.
  • the slats 9 of the blind straighten and the lace 8 tightens.
  • the tension of the lace 8 has the effect of again moving the drawer 17 to the left, the drawer partially closing the passage 23 of the frame (FIG. 9).
  • the stop 27 rises until it comes into abutment against the drawer 17 as shown in FIG. 2.
  • the blind continues to rise, the ladder holder sliding on the part 5.
  • the second embodiment represented in FIGS. 10 and 11 differs from the first embodiment only in the dimension of the lateral passages of the drawer 17 designated here by 170 and by the production of the stops 27 and 28 designated by the references 270 and 280.
  • the drawer 170 has lateral passages 190 and 200 wider than the passages 19 and 20, so that when the drawer 170 is moved to the left, only the passage 24 of the frame is partially closed. This requires differentiation of the stop pieces 270 and 280.
  • the stop piece 280 can be identical to the stop piece 28.
  • the stop piece 270 is provided with two lateral arms 271 and 272 which prevent the stop from passing through. the drawer 170 coming to abut against this drawer as shown in Figure 11. The stop 270 therefore never crosses the drawer.
  • this second embodiment is analogous to the operation of the first embodiment with the difference that the abutment piece 270 never passes through the drawer.
  • FIG. 12 represents an alternative embodiment of this second embodiment in which the stop 270 ′ is provided with lateral arms 273 and 274 in its lower part, these arms coming to abut against the cradle 4.
  • a particular embodiment of the stops 270 and 280 is shown in Figures 13 to 17.
  • the stop consists of a plastic plate 30 provided with pins 31 for fixing the ladder holder, a counterplate 32 connected to the plate 30 by a thinned part 33 forming an articulation and provided with clip tabs 34 and 35 , and two arms 36 and 37 connected to the plate 30 by two thinned parts 38 and 39 forming a joint, the arm 36 being extended downwards by an arm 40 and the arm 37 by an arm 41.
  • the plywood 32 is furthermore provided with holes 42.
  • the plywood 32 After insertion of the pins 31 into the ladder, the plywood 32 is folded down and clipped by its tabs 34 and 35. The end of the pins 31 engages in the holes 42.
  • the arms 36 and 37 can be left in their position initial and one then obtains a stop as shown in Figures 15 and 16. Such a stop can pass through the passages of the frame. This is the case with stop 280.
  • the stop represented in FIGS. 13 to 17 makes it possible to retain the advantage of symmetry in the second embodiment.
  • FIG. 18 illustrates an alternative embodiment of the first embodiment in which two switches 43 and 44 have been arranged at the height of the housings 25 and 26, so that they are actuated when the corresponding stop part enters in the housing, for example the part 28 as shown. This makes it possible to obtain a third automatic stopping point when the motor already has in itself a cage with two end of travel stopping points.
  • the embodiments and variants shown are themselves susceptible of numerous variants.
  • the elastic positioning of the drawer could be achieved in another way, for example by a spring placed in the extension of the drawer.
  • the drawer and its elastic positioning means may advantageously have come in one piece, with the cradle for example as shown in FIGS. 19 to 21.
  • FIG. 19 represents, seen from below, a cradle 45 corresponding to the cradle 4 of FIGS. 1 and 2. It has two vertical side walls, on the left and on the right in the drawing, which are applied against the walls of the box 1.
  • This cradle 45 came in one piece with a drawer 46 located under the cradle and connected to the cradle 45 by two pairs of thin arms 47, 48 and 49, 50 which play the role of positioning springs 21 and 22 of the first form of execution. These arms are connected to the cradle by two bases 55 and 56.
  • the drawer 46 has two cutouts 51 and 52 playing the role of the passages 19 and 20 of the first embodiment. Above these cutouts, the cradle 45 has two frames 53 and 54 defining housings 61 and 62 similar to housings 25 and 26 of the first embodiment and the bottom of which is simply constituted by two transverse bars 57 and 58, 59 and 60 respectively.
  • the drawer 46 is provided with a central passage 63 similar to the passage 18 of the first embodiment, for the passage of the lace 8.
  • the frame is completed by a plastic plate 64 welded or glued to the cradle 45 under the drawer 46.
  • This plate 64 has a central passage 67 similar to passage 29 and two lateral passages 65 and 66 similar to passages 23 and 24 of the first form of execution.
  • the device works in the same way as the device according to the first embodiment.
  • the drawer 46 moves, in the case shown, to the right, the stop 27 being in this case also to the right.
  • This stop 27 abuts against the shoulders 68 and 69 of the drawer.
  • the stop 27 passes through the drawer to enter the housing 62.
  • the drawer 46 becomes a simple movable plate under the cradle.
  • the device is presented as shown in FIGS. 19 and 20.
  • the plate 64 is used for guiding and centering the abutment pieces, this guiding and centering had to be ensured by another means. This is achieved by giving the abutment pieces a particular shape, the shape shown in FIG. 22.
  • the abutment pieces have a stepped profile, namely an upper part 70 in the shape of a truncated pyramid and shaped so as to have four shoulders, three of which 71, 72 and 73 are visible. Below these shoulders, the stops consist of a prismatic part 74. One of the stop pieces also has two wings 75 and 76 and corresponding to the stop 270 ′ in FIG. 12.
  • the pyramidal part 70 of the stops passes through the moving part 46 and engages in the corresponding housing 61 and 62 while coming to center the stop part in this housing.
  • the abutment piece provided with wings 75 and 76 abuts by its wings against the edges of the movable piece 46. The other abutment can penetrate to the bottom of the housing 61.
  • the stop part shown on the right in FIG. 22, abuts by two of its shoulders 71 and 73 against the shoulders 68 and 69 of the moving part 46.
  • the device therefore functions as the second embodiment.

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  • Architecture (AREA)
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Description

La présente invention a pour objet un store vénitien comprenant un arbre d'enroulement sur lequel est monté au moins un tambour d'enroulement sur lequel s'enroule une lacette fixée à la lame inférieure du store et traversant les autres lames en leur partie médiane, et un mécanisme d'orientation des lames comprenant une poulie entraînant par friction une échelle souple dont les extrémités des brins sont reliées à deux sangles fixées à chacun des bords des lames pour assurer le basculement de ces lames en position fermée lorsque le store est complètement déroulé, et un organe mobile positionné élastiquement et soumis à l'action de la lacette sous l'effet de la traction exercée sur la lacette par la lame terminale inférieure, cet organe mobile contrôlant des moyens de butée maintenant les lames dans une première inclinaison lorsqu'ils sont opérants et autorisant le basculement des lames dans une seconde inclinaison lorsqu'ils sont inopérants.The subject of the present invention is a venetian blind comprising a winding shaft on which is mounted at least one winding drum on which is wound a lace fixed to the lower blade of the blind and passing through the other blades in their middle part, and a blade orientation mechanism comprising a pulley frictionally driving a flexible ladder whose ends of the strands are connected to two straps fixed to each of the edges of the blades to ensure the tilting of these blades in the closed position when the blind is fully extended , and a movable member positioned elastically and subjected to the action of the lace under the effect of the traction exerted on the lace by the lower terminal blade, this movable member controlling stop means holding the blades in a first inclination when they are operative and authorizing the tilting of the blades in a second inclination when they are inoperative.

Un store de ce type est connu du brevet DE 32 05 491. Dans ce store, l'organe mobile est constitué d'un poussoir monté à l'extrémité d'un bras élastique parallèle à l'axe de la poulie et fléchissant sous la pression de la lacette enroulée sur la poulie. Ce poussoir agit sur un coulisseau formant butée escamotable pour l'une des extrémités d'un ressort hélicoîdal d'un embrayage à ressort de friction, la relaxation de la lacette ayant pour effet d'escamoter cette butée et de permettre à l'embrayage d'assurer l'entraînement de l'échelle d'un angle déterminé par une butée fixe. Le mécanisme d'orientation comprend environ sept pièces et il n'est pas symétrique, c'est-à-dire qu'il ne peut être utilisé que dans un seul sens de rotation.A blind of this type is known from patent DE 32 05 491. In this blind, the movable member consists of a pusher mounted at the end of an elastic arm parallel to the axis of the pulley and bending under the pressure of the lace wound on the pulley. This pusher acts on a slide forming a retractable stop for one of the ends of a helical spring of a friction spring clutch, the relaxation of the lace having the effect of retracting this stop and allowing the clutch to '' drive the ladder at an angle determined by a fixed stop. The orientation mechanism consists of approximately seven parts and is not symmetrical, i.e. it can only be used in one direction of rotation.

Un mécanisme d'orientation du même type que le mécanisme susmentionné est également connu de la demande de brevet DE 30 37 701. La commande du ressort de l'embrayage y est toutefois réalisée de façon sensiblement plus compliquée, de telle sorte que la mécanisme comporte entre quinze et dix-huit pièces.An orientation mechanism of the same type as the above-mentioned mechanism is also known from patent application DE 30 37 701. However, the control of the clutch spring is carried out in a substantially more complicated manner, so that the mechanism comprises between fifteen and eighteen pieces.

De la demande de brevet EP 0 050 677, on connaît en outre un mécanisme d'orientation comprenant également une barrette montée élastiquement parallèlement à l'axe de la poulie d'enroulement et soumis à l'action de la lacette, cette barrette étant munie de deux cliquets radiaux venant entraîner le brin intérieur de l'échelle par un entraîneur fixée sur ce brin, en faisant basculer les lames du store en position fermée, lorsque la barrette est déchargée. La barrette sert également de moyen d'accouplement du tambour de l'échelle à la poulie d'enroulement. Ce mécanisme comporte environ sept pièces et il n'est pas symétrique.From patent application EP 0 050 677, an orientation mechanism is also known, also comprising a bar elastically mounted parallel to the axis of the winding pulley and subjected to the action of the yoke, this bar being provided two radial pawls coming to drive the inner strand of the ladder by a trainer fixed on this strand, by tilting the blind blades in the closed position, when the bar is unloaded. The bar also serves as a means of coupling the ladder drum to the winding pulley. This mechanism has about seven parts and is not symmetrical.

Ces trois mécanismes présentent en outre la caractéristique commune de présenter des pièces travaillant radialement, ce qui limite le diamètre de l'arbre d'entraînement rendant pratiquement impossible le montage du mécanisme sur un moteur tubulaire. En outre, l'asymétrie de ces mécanismes nécessite des précautions particulières d'orientation du mécanisme lors du montage.These three mechanisms also have the common characteristic of having parts working radially, which limits the diameter of the drive shaft making it practically impossible to mount the mechanism on a tubular motor. In addition, the asymmetry of these mechanisms requires special precautions to orient the mechanism during assembly.

La présente invention a pour but de réaliser un mécanisme d'orientation des lames plus simple que les mécanismes connus et susceptible d'être exécuté dans une forme symétrique, c'est-à-dire utilisable dans les deux sens de rotation et dont le montage est par conséquent indépendant de l'orientation de l'arbre d'entraînement du store.The object of the present invention is to provide a simpler mechanism for orienting the blades than the known mechanisms and capable of being executed in a symmetrical shape, that is to say usable in both directions of rotation and the mounting of which is therefore independent of the orientation of the blind drive shaft.

Le store selon l'invention est caractérisé en ce que le tambour de la lacette et la poulie de l'échelle sont solidaires, que l'organe mobile positionné élastiquement est constitué d'une pièce susceptible de se déplacer dans un plan horizontal dans une direction transversale à l'axe du tambour relativement à un bâti fixe présentant un passage central pour la lacette et deux passages latéraux contrôlés par le tiroir, pour chacun des brins de l'échelle, cette pièce mobile étant traversée par la lacette de telle manière qu'une traction sur la lacette a pour effet de déplacer ladite pièce mobile à l'encontre de ses moyens élastiques de positionnement, et que les brins de l'échelle sont munis chacun d'une pièce de butée, les dimensions des passages latéraux, des pièces de butée et de la pièce mobile étant telles que lorsque la pièce mobile est sollicitée par la lacette, les pièces de butée ne peuvent pas traverser lesdits passages latéraux et les lames du store présentent la première inclinaison, tandis que lorsque la pièce mobile n'est pas sollicitée par la lacette, la pièce de butée montant peut traverser le passage correspondant et autoriser le basculement des lames dans la seconde inclinaison.The blind according to the invention is characterized in that the drum of the lace and the pulley of the ladder are integral, that the movable member positioned elastically consists of a part capable of moving in a horizontal plane in a direction transverse to the axis of the drum relative to a fixed frame having a central passage for the lace and two lateral passages controlled by the drawer, for each of the strands of the ladder, this movable part being traversed by the lace so that traction on the lace has the effect of moving said movable part against its elastic positioning means, and that the strands of the ladder are each provided with a stop piece, the dimensions of the lateral passages, of the pieces of the stopper and of the movable part being such that when the movable piece is stressed by the lace, the stopper pieces cannot pass through said lateral passages and the blades of the blind have the first inclination, while when the movable part is not stressed by the lace, the rising stop part can pass through the corresponding passage and allow the blades to tilt in the second inclination.

Le mécanisme est très simple et symétrique. L'absence de pièce mobile dans la poulie permet de faire passer un arbre de grande section à travers la poulie et, en particulier, de monter la poulie sur un moteur tubulaire.The mechanism is very simple and symmetrical. The absence of a moving part in the pulley makes it possible to pass a shaft of large section through the pulley and, in particular, to mount the pulley on a tubular motor.

Le mécanisme est de préférence réalisé de façon symétrique relativement à un plan de symétrie vertical parallèle à l'axe de l'arbre d'enroulement, en particulier passant par cet axe.The mechanism is preferably produced symmetrically relative to a vertical plane of symmetry parallel to the axis of the winding shaft, in particular passing through this axis.

Le tambour d'enroulement et la poulie de l'échelle peuvent être réalisés en une seule pièce tournant dans un berceau constituant le bâti. Dans ce cas, le mécanisme complet est constitué de trois pièces plus un ou deux ressorts pour le positionnement de la pièce mobile.The winding drum and the ladder pulley can be made in a single piece rotating in a cradle constituting the frame. In this case, the complete mechanism consists of three parts plus one or two springs for positioning the moving part.

Il est possible de réduire de nombre de pièces à deux pièces seulement en réalisant le berceau et la pièce mobile en une seule pièce en matière plastique injectée dans laquelle la pièce mobile est reliée au berceau par des bras minces constituant lesdits moyens élastiques de positionnement du tiroir.It is possible to reduce the number of parts to two parts only by making the cradle and the moving part in a single piece of injected plastic material in which the moving part is connected to the cradle by thin arms constituting said elastic means for positioning the drawer. .

Le dessin annexé représente, à titre d'exemple, quelques formes d'exécution du store selon l'invention.The accompanying drawing shows, by way of example, some embodiments of the blind according to the invention.

La figure 1 est une vue en coupe selon I-I de la figure 2 représentant le store au début de sa phase de montée.Figure 1 is a sectional view along I-I of Figure 2 showing the blind at the start of its rise phase.

La figure 2 est une vue en coupe selon II-II de la figure 1.Figure 2 is a sectional view along II-II of Figure 1.

La figure 3 représente le tiroir selon une vue en coupe selon III-III de la figure 2.FIG. 3 represents the drawer according to a sectional view along III-III of FIG. 2.

La figure 4 représente une variante d'exécution du tiroir dans une vue analogue à celle de la figure 3.FIG. 4 represents an alternative embodiment of the drawer in a view similar to that of FIG. 3.

Les figures 5 à 9 représentent le même store dans différentes positions.Figures 5 to 9 show the same blind in different positions.

La figure 10 représente une deuxième forme d'exécution selon une vue analogue à celle de la figure 2.FIG. 10 represents a second embodiment according to a view similar to that of FIG. 2.

La figure 11 est une vue partielle au niveau du tiroir selon une coupe XI-XI de la figure 10.FIG. 11 is a partial view at the level of the drawer according to a section XI-XI of FIG. 10.

La figure 12 représente une variante d'exécution de la partie représentée à la figure 11.FIG. 12 represents an alternative embodiment of the part shown in FIG. 11.

La figure 13 est une vue en élévation d'un mode d'exécution particulier de la butée d'extrémité de l'échelle, en position ouverte.Figure 13 is an elevational view of a particular embodiment of the end stop of the ladder, in the open position.

La figure 14 est une vue en plan de cette même butée en position ouverte.Figure 14 is a plan view of the same stopper in the open position.

La figure 15 est une vue en élévation de cette même butée en position fermée et bras en position inopérante.Figure 15 is an elevational view of the same stopper in the closed position and arm inoperative position.

La figure 16 est une vue en plan de la butée fermée représentée à la figure 15.FIG. 16 is a plan view of the closed stop represented in FIG. 15.

La figure 17 représente la même butée avec ses bras en position opérante.Figure 17 shows the same stop with its arms in the operating position.

La figure 18 représente une variante d'exécution de la première forme d'exécution.FIG. 18 represents an alternative embodiment of the first embodiment.

La figure 19 est une vue de dessous d'une forme d'exécution en une pièce du berceau et du tiroir, en position de repos.Figure 19 is a bottom view of an embodiment in one piece of the cradle and the drawer, in the rest position.

La figure 20 représente la même exécution en position de travail vue en coupe selon XX-XX de la figure 21.FIG. 20 represents the same execution in the working position seen in section along XX-XX of FIG. 21.

La figure 21 est une vue partielle, en coupe selon XXI-XXI de la figure 20.FIG. 21 is a partial view, in section along XXI-XXI of FIG. 20.

La figure 22 représente une forme d'exécution particulière des pièces de butée permettant une simplification de la forme d'exécution représentée aux figures 19 à 21.FIG. 22 represents a particular embodiment of the abutment pieces allowing a simplification of the embodiment represented in FIGS. 19 to 21.

Le store représenté aux figures 1 à 3 comprend un caisson métallique rectangulaire 1, partiellement représenté à la figure 1, dans lequel sont montés plusieurs unités d'enroulement et d'orientation du store vénitien, une seule de ces unités étant représentée au dessin. Le caisson 1 est monté dans une embrasure 2 représentée en traits mixtes, à l'exception de son bord inférieur 3.The blind shown in Figures 1 to 3 comprises a rectangular metal box 1, partially shown in Figure 1, in which are mounted several winding and orientation units of the Venetian blind, only one of these units being shown in the drawing. The box 1 is mounted in a recess 2 shown in phantom, with the exception of its lower edge 3.

L'unité d'enroulement et d'orientation représentée comprend un berceau 4 fixé au caisson 1 et dans lequel est logé rotativement une pièce 5 tubulaire de forme générale cylindrique présentant un passage axial de forme hexagonale destiné à son emboîtement sur un moteur tubulaire. Cette pièce 5 présente une gorge médiane 7 constituant un tambour d'enroulement pour la lacette 8 du store, lacette traversant librement, d'une manière connue en soi, les lames intermédiaires 9 du store et attachée à la lame terminale inférieure 10. La pièce 5 présente en outre deux gorges 11 et 12 disposées de part et d'autre de la gorge 7 et constituant deux poulies dans lesquelles passent deux bandes 13 et 14 dont les extrémités sont attachées, de manière connue en soi, aux extrémités de deux sangles 15 et 16 fixées, de manière connue en soi, à chacun des bords de chacune des lames 9 et 10 du store. Il est habituel de parler d'échelle pour l'ensemble des bandes 13 et 14 et des sangles 15 et 16 et de porte-échelle pour les bandes 13 et 14. Le porte-échelle est entraîné par frottement par la pièce 5 lorsque celle-ci est entraînée en rotation.The winding and orientation unit shown comprises a cradle 4 fixed to the box 1 and in which is housed in rotation a tubular part 5 of generally cylindrical shape having an axial passage of hexagonal shape intended for its fitting onto a tubular motor. This part 5 has a central groove 7 constituting a winding drum for the lace 8 of the blind, a lace freely passing through, in a manner known per se, the intermediate blades 9 of the blind and attached to the lower end blade 10. The part 5 also has two grooves 11 and 12 arranged on either side of the groove 7 and constituting two pulleys through which pass two bands 13 and 14, the ends of which are attached, in a manner known per se, to the ends of two straps 15 and 16 fixed, in a manner known per se, to each of the edges of each of the blades 9 and 10 of the blind. It is usual to speak of a ladder for all of the bands 13 and 14 and of the straps 15 and 16 and of a ladder holder for the bands 13 and 14. The ladder holder is driven by friction by the part 5 when it it is rotated.

Le berceau 4 constitue simultanément un bâti pour un tiroir 17, mobile en translation, sous la pièce 5, transversalement à l'axe de l'arbre d'entraînement, dans un plan horizontal. Ce tiroir 17 présente un passage central 18 laissant passer, avec un léger jeu, la lacette 8. De chaque côté du passage 18, symétriquement à celui-ci, le tiroir 17 présente deux passages rectangulaires 19 et 20 (figure 3). Le tiroir 17 est en outre relié au berceau 4 par deux lames ressort 21 et 22 qui ont tendance à maintenir le tiroir dans une position centrale, telle que représentée à la figure 6, en l'absence de sollicitation transversale.The cradle 4 simultaneously constitutes a frame for a drawer 17, movable in translation, under the part 5, transversely to the axis of the drive shaft, in a horizontal plane. This drawer 17 has a central passage 18 letting pass, with a slight play, the lace 8. On each side of the passage 18, symmetrically thereto, the drawer 17 has two rectangular passages 19 and 20 (Figure 3). The drawer 17 is further connected to the cradle 4 by two spring blades 21 and 22 which tend to keep the drawer in a central position, as shown in Figure 6, in the absence of transverse stress.

Sous le tiroir 17, le berceau 4 présente deux passages rectangulaire 23 et 24 coincidant ou non avec les passages 19 et 20 du tiroir, selon la position de celui-ci. Au-dessus du tiroir 17, le berceau 4 présente deux logements 25 et 26 situés en face des passages 23 et 24.Under the drawer 17, the cradle 4 has two rectangular passages 23 and 24 which may or may not coincide with the passages 19 and 20 of the drawer, depending on the position of the latter. Above the drawer 17, the cradle 4 has two housings 25 and 26 located opposite the passages 23 and 24.

Aux extrémités du porte-échelle 13/14, sont fixées des pièces de butée 27 et 28 en forme de barrette dont les dimensions sont telles qu'elles peuvent traverser les passages du berceau et du tiroir et pénétrer dans les logements 25 et 26.At the ends of the ladder holder 13/14, stop pieces 27 and 28 are fixed in the form of a bar, the dimensions of which are such that they can pass through the passages of the cradle and of the drawer and enter the housings 25 and 26.

Selon une variante d'exécution représentée à la figure 4, le tiroir 17′ pourrait être monté pivotant autour d'un axe vertical 29. Le passage pour la lacette 8 pourrait être constitué d'une fente 18′. Le ressort de positionnement du tiroir pourrait être monté au niveau de l'axe d'articulation 29.According to an alternative embodiment shown in Figure 4, the drawer 17 'could be pivotally mounted about a vertical axis 29. The passage for the lace 8 could consist of a slot 18'. The drawer positioning spring could be mounted at the hinge pin 29.

Le fonctionnement du store sera maintenant décrit à l'aide des figures 5 à 9.The operation of the blind will now be described with the aid of FIGS. 5 to 9.

La figure 5 représente le store en position de descente. La lame 10 est suspendue et exerce une traction sur la lacette 8 qui a pour effet d'exercer sur le tiroir 17 un effort transversal qui déplace le tiroir 17 vers la gauche contre l'action de ses ressorts 21 et 22. Le passage 20 du tiroir n'est plus en face du passage 24 du bâti, ce qui a pour effet d'obturer partiellement ce passage 24. La pièce 5 tournant dans le sens de la flèche, le porte-échelle est entraîné par frottement dans le même sens, de telle sorte que sa butée 27 descend et sa butée 28 monte et s'engage dans le passage 24 du bâti, mais vient buter contre le tiroir 17, déterminant une première inclinaison, relativement faible, des lames 9 du store.Figure 5 shows the blind in the lowering position. The blade 10 is suspended and exerts a pull on the lace 8 which has the effect of exerting on the drawer 17 a transverse force which moves the drawer 17 to the left against the action of its springs 21 and 22. The passage 20 of the drawer is no longer opposite the passage 24 of the frame, which has the effect of partially closing this passage 24. The part 5 rotating in the direction of the arrow, the ladder holder is driven by friction in the same direction, so that its stop 27 descends and its stop 28 rises and engages in the passage 24 of the frame, but abuts against the drawer 17, determining a first inclination, relatively small, of the blades 9 of the blind.

Lorsque la lame inférieure 10 atteint le bord inférieur 3 de l'embrasure, la lacette 8 se détend et relâche le tiroir 17 qui reprend sa position médiane sous l'effet de ses ressorts. Dans cette position, les passages du tiroir coïncident avec les passages du bâti.When the lower blade 10 reaches the lower edge 3 of the embrasure, the lace 8 relaxes and releases the drawer 17 which returns to its middle position under the effect of its springs. In this position, the passages of the drawer coincide with the passages of the frame.

La pièce 5 continuant de tourner dans le même sens en entraînant l'échelle, la butée 28 traverse le tiroir et vient buter au fond du logement 26 du berceau entraînant le basculement des lames 9 du store dans une seconde inclinaison, relativement forte, telle que représentée à la figure 7.The part 5 continuing to rotate in the same direction while driving the ladder, the stop 28 crosses the drawer and abuts at the bottom of the housing 26 of the cradle causing the tilting of the blades 9 of the blind in a second, relatively strong inclination, such that shown in Figure 7.

Lors de la remontée du store, la pièce 5 est entraînée dans la sens de la flèche selon la figure 8. Le porte-échelle est entraîné dans l'autre sens et sa butée 28 traverse le tiroir 17 en direction du bas. Les lames 9 du store se redressent et la lacette 8 se retend.When the blind is raised, the part 5 is driven in the direction of the arrow according to FIG. 8. The ladder holder is driven in the other direction and its stop 28 passes through the drawer 17 in the direction of the bottom. The slats 9 of the blind straighten and the lace 8 tightens.

La tension de la lacette 8 a pour effet de déplacer à nouveau le tiroir 17 vers la gauche, le tiroir venant obturer partiellement le passage 23 du bâti (figure 9).The tension of the lace 8 has the effect of again moving the drawer 17 to the left, the drawer partially closing the passage 23 of the frame (FIG. 9).

La butée 27 remonte jusqu'à ce qu'elle arrive en butée contre le tiroir 17 comme représenté à la figure 2. Le store continue de remonter, le porte-échelle glissant sur la pièce 5.The stop 27 rises until it comes into abutment against the drawer 17 as shown in FIG. 2. The blind continues to rise, the ladder holder sliding on the part 5.

La seconde forme d'exécution représentée aux figures 10 et 11 ne diffère de la première forme d'exécution que par la dimension des passages latéraux du tiroir 17 désigné ici par 170 et par la réalisation des butées 27 et 28 désignées par les références 270 et 280.The second embodiment represented in FIGS. 10 and 11 differs from the first embodiment only in the dimension of the lateral passages of the drawer 17 designated here by 170 and by the production of the stops 27 and 28 designated by the references 270 and 280.

Le tiroir 170 présente des passages latéraux 190 et 200 plus larges que les passages 19 et 20, de telle sorte que lorsque le tiroir 170 est déplacé vers la gauche, seul le passage 24 du bâti est partiellement obturé. Ceci nécessite une différenciation des pièces de butée 270 et 280. La pièce de butée 280 peut être identique à la pièce de butée 28. Par contre, la pièce de butée 270 est munie de deux bras latéraux 271 et 272 qui empêchent la butée de traverser le tiroir 170 en venant buter contre ce tiroir comme représenté à la figure 11. La butée 270 ne traverse donc jamais le tiroir.The drawer 170 has lateral passages 190 and 200 wider than the passages 19 and 20, so that when the drawer 170 is moved to the left, only the passage 24 of the frame is partially closed. This requires differentiation of the stop pieces 270 and 280. The stop piece 280 can be identical to the stop piece 28. On the other hand, the stop piece 270 is provided with two lateral arms 271 and 272 which prevent the stop from passing through. the drawer 170 coming to abut against this drawer as shown in Figure 11. The stop 270 therefore never crosses the drawer.

Le fonctionnement de cette deuxième forme d'exécution est analogue au fonctionnement de la première forme d'exécution à la différence que la pièce de butée 270 ne traverse jamais le tiroir.The operation of this second embodiment is analogous to the operation of the first embodiment with the difference that the abutment piece 270 never passes through the drawer.

La figure 12 représente une variante d'exécution de cette deuxième forme d'exécution dans laquelle la butée 270′ est munie de bras latéraux 273 et 274 dans sa partie inférieure, ces bras venant buter contre le berceau 4.FIG. 12 represents an alternative embodiment of this second embodiment in which the stop 270 ′ is provided with lateral arms 273 and 274 in its lower part, these arms coming to abut against the cradle 4.

Une forme d'exécution particulière des butées 270 et 280 est représentée aux figures 13 à 17.A particular embodiment of the stops 270 and 280 is shown in Figures 13 to 17.

La butée est constituée d'une plaque 30 en matière plastique munie de tenons 31 pour la fixation du porte-échelle, d'une contreplaque 32 reliée à la plaque 30 par une partie amincie 33 formant articulation et munie de languettes de clipage 34 et 35, et de deux bras 36 et 37 reliés à la plaque 30 par deux parties amincies 38 et 39 formant articulation, le bras 36 étant prolongé vers le bas par un bras 40 et le bras 37 par un bras 41. La contreplaque 32 est en outre pourvue de trous 42.The stop consists of a plastic plate 30 provided with pins 31 for fixing the ladder holder, a counterplate 32 connected to the plate 30 by a thinned part 33 forming an articulation and provided with clip tabs 34 and 35 , and two arms 36 and 37 connected to the plate 30 by two thinned parts 38 and 39 forming a joint, the arm 36 being extended downwards by an arm 40 and the arm 37 by an arm 41. The plywood 32 is furthermore provided with holes 42.

Après introduction des tenons 31 dans l'échelle, la contreplaque 32 est rabattue et clipée par ses languettes 34 et 35.L'extrémité des tenons 31 vient s'engager dans les trous 42. Les bras 36 et 37 peuvent être laissés dans leur position initiale et l'on obtient alors une butée telle que représentée aux figures 15 et 16. Une telle butée peut traverser les passages du bâti. C'est le cas de la butée 280.After insertion of the pins 31 into the ladder, the plywood 32 is folded down and clipped by its tabs 34 and 35. The end of the pins 31 engages in the holes 42. The arms 36 and 37 can be left in their position initial and one then obtains a stop as shown in Figures 15 and 16. Such a stop can pass through the passages of the frame. This is the case with stop 280.

Par contre, si les bras 36 et 37 sont rabattus latéralement et maintenus dans cette position par la contreplaque 32 qui retient les bras 40 et 41, on obtient la butée représentée à la figure 17. Une telle butée pourra être utilisée en tant que butée 270 dans la forme d'exécution représentée à la figure 10.On the other hand, if the arms 36 and 37 are folded laterally and held in this position by the counterplate 32 which retains the arms 40 and 41, the stop shown in FIG. 17 is obtained. Such a stop could be used as a stop 270 in the embodiment shown in Figure 10.

La butée représentée aux figures 13 à 17 permet de conserver l'avantage de la symétrie dans la seconde forme d'exécution.The stop represented in FIGS. 13 to 17 makes it possible to retain the advantage of symmetry in the second embodiment.

La figure 18 illustre une variante d'exécution de la première forme d'exécution dans laquelle deux interrupteurs 43 et 44 ont été disposés à la hauteur des logements 25 et 26, de telle sorte qu'ils sont actionnés lorsque la pièce de butée correspondante pénètre dans le logement, par exemple la pièce 28 comme représenté. Ceci permet d'obtenir un troisième point d'arrêt automatique lorsque le moteur comporte déjà en lui-même une cage à deux point d'arrêt de fin de course.FIG. 18 illustrates an alternative embodiment of the first embodiment in which two switches 43 and 44 have been arranged at the height of the housings 25 and 26, so that they are actuated when the corresponding stop part enters in the housing, for example the part 28 as shown. This makes it possible to obtain a third automatic stopping point when the motor already has in itself a cage with two end of travel stopping points.

Les formes d'exécution et les variantes représentées sont elles-mêmes susceptibles de nombreuses variantes. En particulier, le positionnement élastique du tiroir pourrait être réalisé d'une autre manière, par exemple par un ressort placé dans le prolongement du tiroir.The embodiments and variants shown are themselves susceptible of numerous variants. In particular, the elastic positioning of the drawer could be achieved in another way, for example by a spring placed in the extension of the drawer.

Dans le cas où le mécanisme d'orientation des lames est exécuté en matière plastique, le tiroir et ses moyens élastiques de positionnement peuvent être avantageusement venus d'une pièce, avec le berceau par exemple comme représenté aux figures 19 à 21.In the case where the blade orientation mechanism is made of plastic, the drawer and its elastic positioning means may advantageously have come in one piece, with the cradle for example as shown in FIGS. 19 to 21.

La figure 19 représente, vu de dessous, un berceau 45 correspondant au berceau 4 des figures 1 et 2. Il présente deux parois latérales verticales, à gauche et à droite dans le dessin, qui viennent s'appliquer contre les parois du caisson 1. Ce berceau 45 est venu d'une pièce avec un tiroir 46 situé sous le berceau et relié au berceau 45 par deux paires de bras minces 47, 48 et 49, 50 qui jouent le rôle des ressort de positionnement 21 et 22 de la première forme d'exécution. Ces bras sont reliés au berceau par deux socles 55 et 56.FIG. 19 represents, seen from below, a cradle 45 corresponding to the cradle 4 of FIGS. 1 and 2. It has two vertical side walls, on the left and on the right in the drawing, which are applied against the walls of the box 1. This cradle 45 came in one piece with a drawer 46 located under the cradle and connected to the cradle 45 by two pairs of thin arms 47, 48 and 49, 50 which play the role of positioning springs 21 and 22 of the first form of execution. These arms are connected to the cradle by two bases 55 and 56.

Le tiroir 46 présente deux découpes 51 et 52 jouant le rôle des passages 19 et 20 de la première forme d'exécution. Au-dessus de ces découpes, le berceau 45 présente deux cadres 53 et 54 déterminant des logements 61 et 62 analogues aux logements 25 et 26 de la première forme d'exécution et dont le fond est simplement constitué par deux barrettes transversales 57 et 58, respectivement 59 et 60.The drawer 46 has two cutouts 51 and 52 playing the role of the passages 19 and 20 of the first embodiment. Above these cutouts, the cradle 45 has two frames 53 and 54 defining housings 61 and 62 similar to housings 25 and 26 of the first embodiment and the bottom of which is simply constituted by two transverse bars 57 and 58, 59 and 60 respectively.

Le tiroir 46 est muni d'un passage central 63 analogue au passage 18 de la première forme d'exécution, pour le passage de la lacette 8.The drawer 46 is provided with a central passage 63 similar to the passage 18 of the first embodiment, for the passage of the lace 8.

Le bâti est complété par une plaque 64 en matière plastique soudée ou collée au berceau 45 sous le tiroir 46. Cette plaque 64 présente un passage central 67 analogue au passage 29 et deux passages latéraux 65 et 66 analogues aux passages 23 et 24 de la première forme d'exécution.The frame is completed by a plastic plate 64 welded or glued to the cradle 45 under the drawer 46. This plate 64 has a central passage 67 similar to passage 29 and two lateral passages 65 and 66 similar to passages 23 and 24 of the first form of execution.

Le dispositif, tel que représenté à la figure 21, fonctionne de la même manière que le dispositif selon la première forme d'exécution. Sous l'effet de la traction de la lacette 8, le tiroir 46 se déplace, dans le cas représenté, vers la droite, la butée 27 étant dans ce cas également à droite. Cette butée 27 vient buter contre les épaulements 68 et 69 du tiroir. Lorsque le tiroir est en position de repos, la butée 27 traverse le tiroir pour pénétrer dans le logement 62.The device, as shown in FIG. 21, works in the same way as the device according to the first embodiment. Under the effect of the pull of the lace 8, the drawer 46 moves, in the case shown, to the right, the stop 27 being in this case also to the right. This stop 27 abuts against the shoulders 68 and 69 of the drawer. When the drawer is in the rest position, the stop 27 passes through the drawer to enter the housing 62.

Il est possible de simplifier encore la fabrication du dispositif en supprimant la plaque 64. Dans ce cas, le tiroir 46 devient une simple plaque mobile sous le berceau. Le dispositif se présente comme représenté aux figures 19 et 20.It is possible to further simplify the manufacture of the device by eliminating the plate 64. In this case, the drawer 46 becomes a simple movable plate under the cradle. The device is presented as shown in FIGS. 19 and 20.

La plaque 64 servant au guidage et centrage des pièces de butée, il convenait d'assurer ce guidage et ce centrage par un autre moyen. On y parvient en donnant une forme particulière aux pièces de butée, forme représentée à la figure 22.Since the plate 64 is used for guiding and centering the abutment pieces, this guiding and centering had to be ensured by another means. This is achieved by giving the abutment pieces a particular shape, the shape shown in FIG. 22.

Les pièces de butée présentent un profil étagé, à savoir une partie supérieure 70 en forme de pyramide tronquée et profilée de manière à présenter quatre épaulements dont trois 71, 72 et 73 sont visibles. En dessous de ces épaulements, les butées sont constituées d'une partie prismatique 74. L'une des pièces de butée présente en outre deux ailes 75 et 76 et correspondant à la butée 270′ de la figure 12.The abutment pieces have a stepped profile, namely an upper part 70 in the shape of a truncated pyramid and shaped so as to have four shoulders, three of which 71, 72 and 73 are visible. Below these shoulders, the stops consist of a prismatic part 74. One of the stop pieces also has two wings 75 and 76 and corresponding to the stop 270 ′ in FIG. 12.

Lorsque le dispositif est dans la position de repos représentée à la figure 19, la partie pyramidale 70 des butées traverse la pièce mobile 46 et s'engage dans le logement correspondant 61 et 62 en venant centrer la pièce de butée dans ce logement. La pièce de butée munie des ailes 75 et 76 vient buter par ses ailes contre les bords de la pièce mobile 46. L'autre butée peut pénétrer jusqu'au fond du logement 61.When the device is in the rest position shown in FIG. 19, the pyramidal part 70 of the stops passes through the moving part 46 and engages in the corresponding housing 61 and 62 while coming to center the stop part in this housing. The abutment piece provided with wings 75 and 76 abuts by its wings against the edges of the movable piece 46. The other abutment can penetrate to the bottom of the housing 61.

Lorsque la pièce mobile 46 est déplacée, par exemple vers la droite comme représentée à la figure 20, la pièce de butée, représentée à droite à la figure 22, vient buter par deux de ses épaulements 71 et 73 contre les épaulements 68 et 69 de la pièce mobile 46.When the moving part 46 is moved, for example to the right as shown in FIG. 20, the stop part, shown on the right in FIG. 22, abuts by two of its shoulders 71 and 73 against the shoulders 68 and 69 of the moving part 46.

Le dispositif fonctionne donc comme la seconde forme d'exécution.The device therefore functions as the second embodiment.

Claims (12)

  1. Venetian blind comprising a winding shaft, on which is mounted at least one winding drum (5), on which is wound a cord (8) fastened to the lowermost slat (10) of the blind and passing through the other slats in their middle part, and a slat orientation mechanism comprising a pulley (11, 12) frictionally driving a flexible ladder (13, 14), the ends of the sides of which are connected to two bands (15, 16) fastened to each of the edges of the slats of the blind in order to ensure that these slats tilt into the closed position when the blind is completely unwound, and a movable member positioned elastically and subjected to the action of the cord under the effect of the pull exerted on the cord by the lowermost end slat, this movable member controlling stop means keeping the slats in a first inclination when they are operative and allowing the slats to tilt into a second position when they are inoperative, characterised in that the drum (7) of the cord and the pulley (11, 12) of the ladder are integral with one another, in that the elastically positioned movable member consists of a piece (17; 170; 46) capable of being displaced in a horizontal plane in a direction transverse relative to the axis of the drum in relation to a stationary frame (4; 45) having a central passage (29) for the cord and two lateral passages (23, 24; 65; 66; 61, 62) controlled by said movable piece (17; 46) for each of the sides of the ladder (13, 14), the cord (8) passing through this movable piece in such a way that a pull on the cord has the effect of displacing said movable piece counter to its elastic positioning means (25, 26; 47, 48, 49, 50), and in that the sides of the ladder are each equipped with a stop piece (27, 28; 270, 280), the dimensions of the lateral passages of the stop pieces and of said movable piece being such that, when the movable piece is subjected to stress by the cord, the stop pieces cannot pass through said lateral passages and the slats of the blind have the first inclination, whereas, when the movable piece is not subjected to stress by the cord, the ascending stop piece can pass through the corresponding passage and allow the slats to tilt into the second inclination.
  2. Venetian blind according to Claim 1, characterised in that the orientation mechanism has a vertical plane of symmetry parallel to the axis of the winding shaft.
  3. Venetian blind according to Claim 1 or 2, characterised in that said movable piece consists of a slide (17; 170; 46) movable on the inside of the frame (4; 45, 64) above said passages (23, 24; 65, 66) of the frame.
  4. Venetian blind according to Claim 3, characterised in that the slide (17) has ladder passages (25, 26) of a width substantially equal to that of the lateral passages (23, 24) of the frame.
  5. Venetian blind according to Claim 3, characterised in that the slide (170) has ladder passages (190, 200) of a width substantially greater than that of the lateral passages of the frame, and in that the dimension of the stop piece (270) of the ladder side located on the outside of the blind is such that this stop piece cannot pass through the corresponding lateral passage.
  6. Venetian blind according to Claim 5, characterised in that the stop pieces are equipped with orientable arms (36, 37) capable of being arranged in an operative or inoperative position, the stop being incapable of passing through the corresponding lateral passage when these arms are arranged in the operative position.
  7. Venetian blind according to Claim 6, characterised in that the plastic stop pieces consist of a plate (30) equipped with stubs (31) for fastening the ladder and with two orientable arms (36, 37) connected to the plate by means of a thinned part and each having a locking am (40, 41), and with a counterplate (32) articulated on the side of the plate and capable of being turned down and snapped onto the plate, thereby keep or not keeping the locking arms in such a position that the orientable arms are directed laterally.
  8. Venetian blind according to one of the Claims 1 to 6, characterised in that the pulley (11; 12) and the drum (7) are in one piece mounted in a cradle (4; 45) which at the same time forms said frame.
  9. Venetian blind according to Claim 3, characterised in that the frame consists of two attached plastic pieces (45, 64), and in that the slide (46) is produced in one piece with the upper part (45) of the frame, to which it is connected by means of thin arms (47, 48, 49, 50) forming the elastic positioning means of the slide.
  10. Venetian blind according to Claim 1, characterised in that said movable piece (46) consists of a plate arranged under the frame (45) and produced in one piece of plastic with the frame, to which it is connected by means of thin arms (47, 48, 49, 50) forming said elastic positioning means of the plate, and in that the stop pieces are shaped (70) so as to ensure their self-centring in the passages of said movable piece (46).
  11. Venetian blind according to Claim 10, characterised in that the stop pieces have a stepped shape (70 to 74).
  12. Venetian blind according to one of the Claims 1 to 8, characterised in that it comprises limit switches (43, 44) arranged above said movable piece and actuable by said stop pieces.
EP92810113A 1991-02-22 1992-02-19 Venetian blind Expired - Lifetime EP0500499B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9102160A FR2673232B1 (en) 1991-02-22 1991-02-22 VENETIAN BLIND.
FR9102160 1991-02-22

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Publication Number Publication Date
EP0500499A1 EP0500499A1 (en) 1992-08-26
EP0500499B1 true EP0500499B1 (en) 1995-05-24

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EP92810113A Expired - Lifetime EP0500499B1 (en) 1991-02-22 1992-02-19 Venetian blind

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US (1) US5207261A (en)
EP (1) EP0500499B1 (en)
DE (1) DE69202593T2 (en)
ES (1) ES2048716T1 (en)
FR (1) FR2673232B1 (en)

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US5573051A (en) * 1995-02-06 1996-11-12 Judkins; Ren Venetian type blinds
US6068039A (en) * 1992-09-28 2000-05-30 Judkins; Ren Material for venetian type blinds
US5839494A (en) * 1995-02-06 1998-11-24 Judkins; Ren Bottom and top stacking venetian type blind with fixed headrail tilt
US5806579A (en) * 1995-02-06 1998-09-15 Judkins; Ren Venetian type blinds having opposed lift cords
US6648050B1 (en) 1997-11-04 2003-11-18 Andrew J. Toti Spring drive system and window cover
FR2781521B1 (en) 1998-07-27 2000-10-13 Franciaflex Ind VENETIAN BLIND
KR100532227B1 (en) * 2002-11-29 2005-12-01 송명호 Angle adjustment assembly of electromotion type blind
CN101240691B (en) * 2008-03-17 2011-07-20 朱晓荧 Wound roll drive apparatus for roll screen
CN101328782B (en) * 2008-07-26 2011-08-10 朱晓荧 Curtain
US20100319859A1 (en) * 2009-06-23 2010-12-23 Taihao Knitting Belt Co., Ltd. Ladder cord lattice for window blinds
US8659246B2 (en) 2010-02-23 2014-02-25 Homerun Holdings Corporation High efficiency roller shade
US9249623B2 (en) 2010-02-23 2016-02-02 Qmotion Incorporated Low-power architectural covering
US9194179B2 (en) 2010-02-23 2015-11-24 Qmotion Incorporated Motorized shade with the transmission wire passing through the support shaft
US8575872B2 (en) 2010-02-23 2013-11-05 Homerun Holdings Corporation High efficiency roller shade and method for setting artificial stops
US8939190B2 (en) 2010-10-18 2015-01-27 QMotion Limited Motorizable tilt shade system and method
US9091115B2 (en) 2010-10-18 2015-07-28 Qmotion Incorporated Motorizable tilt shade system and method

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US2182804A (en) * 1938-12-02 1939-12-12 Harold R Haase Venetian blind
US2604939A (en) * 1950-03-09 1952-07-29 Rolladenfabrik A Griesser A G Venetian blind
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CH550932A (en) * 1972-03-23 1974-06-28 Metallbau Ag Zuerich FOLDING BLIND.
DE2726452A1 (en) * 1977-06-11 1979-05-23 Hunter Douglas Ind Bv DRIVE FOR A BLIND BLIND
CH644669A5 (en) * 1980-01-24 1984-08-15 Griesser Ag REEL SLAT STORE.
CH650311A5 (en) * 1981-05-19 1985-07-15 Baumann Rolladen REEL SLAT STORE.
US4917168A (en) * 1989-09-21 1990-04-17 Chen Cheng Hsiung Angle-controlling device for a venetian blind

Also Published As

Publication number Publication date
ES2048716T1 (en) 1994-04-01
US5207261A (en) 1993-05-04
FR2673232B1 (en) 1993-06-11
EP0500499A1 (en) 1992-08-26
DE69202593D1 (en) 1995-06-29
FR2673232A1 (en) 1992-08-28
DE69202593T2 (en) 1996-02-01

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