EP3670818B1 - Drive device for horizontal blinds - Google Patents

Drive device for horizontal blinds Download PDF

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Publication number
EP3670818B1
EP3670818B1 EP19218515.5A EP19218515A EP3670818B1 EP 3670818 B1 EP3670818 B1 EP 3670818B1 EP 19218515 A EP19218515 A EP 19218515A EP 3670818 B1 EP3670818 B1 EP 3670818B1
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EP
European Patent Office
Prior art keywords
drive
actuating
drive device
actuators
spindles
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Active
Application number
EP19218515.5A
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German (de)
French (fr)
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EP3670818A1 (en
Inventor
Michael Sautner
Franz Topf
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Sautner Michael
Topf Franz
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Individual
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Publication of EP3670818A1 publication Critical patent/EP3670818A1/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32Operating, guiding, or securing devices therefor
    • E06B9/327Guides for raisable lamellar blinds with horizontal lamellae
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/303Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/308Lamellar 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
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/302Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable without ladder-tape, e.g. with lazy-tongs, with screw spindle
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/303Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/307Details of tilting bars and their operation
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32Operating, guiding, or securing devices therefor
    • E06B9/322Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32Operating, guiding, or securing devices therefor
    • E06B9/322Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • E06B2009/3222Cordless, i.e. user interface without cords

Definitions

  • the invention relates to a drive device for horizontal blinds, with lamellae carriers guided on parallel adjusting drives, the adjusting drives forming drive spindles, each of which has a spirally revolving adjusting gear with a gradient that decreases towards a rest position, and the lamellae carriers each having two mutually displaceable in the longitudinal direction of the adjusting drives Include actuators, each engaging in one of the two gears.
  • drive devices which comprise slat carriers which are guided on parallel drive spindles and have cross braces ( WO 1991004390 A1 ).
  • the crossbars of the respective disk carriers are in engagement with the spirally encircling thread turns of both spindles due to the force of gravity and can be moved by the rotational movement of the spindles along their horizontally running longitudinal direction.
  • the drive spindles In order to be able to bring the slats together tightly into a rest position to form a slat pack when the blind is completely open, the drive spindles have a smaller thread pitch at their end sections compared to their middle sections.
  • one of the two spindles is provided with a free-wheeling means, which causes the spindles to start offset, which leads to a swiveling of the cross struts of the slat carrier engaging in the threads of the spindles.
  • the disadvantage here is that reliable guidance of the disk carriers on the drive spindles and uniform alignment of the disks is not possible even with synchronizable drive spindles, since the cross braces, which are only loosely in contact with the spindles, can slip relatively easily in the threads.
  • the invention is therefore based on the object of designing a drive device for horizontal blinds of the type described above in such a way that low manufacturing and assembly effort achieved a long service life and functionality and in particular despite low manufacturing and assembly effort and low component requirements, a particularly reliable pivoting of the slats is made possible.
  • the invention solves the problem in that the disk carriers have a length-adjustable swivel unit that is articulated to the two actuators and that the drive spindles can be adjusted independently of one another.
  • the actuators engaging in the adjustment gears absorb the thrust forces of the respective adjustment gear flanks, as a result of which the actuators are moved translationally along the longitudinal direction of the spindle.
  • the actuators of the disk carrier do not rest on the floor of the aisles due to gravity, but rather engage in the aisles in the sense of a guidance and positioning aid, whereby all disk carriers of the drive device according to the invention are guided uniformly along them, regardless of the direction of rotation of the spindles. This effectively avoids unwanted skewing and consequently the risk of the slats becoming wedged.
  • the two actuators of a disk carrier can be displaced in relation to one another in the longitudinal direction of the adjusting drives or the drive spindles.
  • displaceability is understood to mean that the two actuators of a disk carrier are moved independently of one another and relative to one another along the drive spindle longitudinal direction, or both at the same spindle height or positioned offset to one another in the longitudinal direction of the spindle.
  • the two actuators are, in particular, two independent units that do not have a rigid connection, but instead have an articulated or flexible connection with one another.
  • the respective slats can be fastened to the slat carrier via a slat holder, the slat holder having, for example, a receiving slot for the slat to be inserted or else forming a connecting pin which engages in a corresponding pin seat of the slat.
  • the drive spindles can be designed in such a way that they have a plastic-coated metal core.
  • the plastic casing has a plurality of, for example, injection-molded or 3D-printed spindle segments, which are preferably glued to one another or can be connected to one another in a materially bonded manner in some other way.
  • the actuators can have guide lugs which engage radially in the actuating gear.
  • the preferably at least three guide lugs effectively prevent tilting of the actuators and at the same time absorb the thrust forces of the drive spindles.
  • the actuators enclose the drive spindle on the peripheral side and have at least three guide pins on the inside that protrude radially into the adjustment gears of the drive spindles. In the case of three guide pins, these can be arranged offset from one another on the circumferential side, each at an angle of 120°.
  • the length of the pivoting unit is in particular the shortest connection length of an imaginary connecting line running through the pivoting unit between the two actuators, whereby the connection length can be varied, for example, via a simple telescopic connection, a connecting rod running in a guide sleeve, an adjustable connecting rail or via a bolt that can be displaced in a slot in a connecting body of the pivoting unit and is articulated on one of the actuators. Since the drive spindles can be adjusted independently of one another, the respective actuators of a disk carrier can be displaced relative to one another in the longitudinal direction of the spindle or moved relative to one another in the longitudinal direction of the spindle, depending on the speeds and/or directions of rotation at which the two drive spindles rotate.
  • the actuators can be shifted from an open position of the slats to a closed position of the slats, and vice versa.
  • the displacement of the actuators relative to one another can also take place while both drive spindles are in operation, for example by briefly accelerating one of the drive spindles to a higher rotational speed, so that pivoting is also made possible with simultaneous movement of the slats along the spindle longitudinal direction.
  • the gradient of the adjustment gears can be designed in such a way that a displacement of an actuator during one revolution allows the associated lamella to be pivoted from a closed position into an open position.
  • one of the pinions of the transmission itself can have a free-wheeling means.
  • the spindles start offset, which means that the slats can be pivoted.
  • particularly large adjustment angles result when the driver of the freewheeling means is driven via a planetary gear such that a relatively low relative speed between the driver and the freewheeling actuator results at a high actuating speed of the two actuators.
  • the actuating elements can be guided via one or more guide rails running parallel to the actuating drives.
  • the actuators can be designed in such a way that they each have a guide slot into which the guide rails of a guide rail running parallel thereto between the two drive spindles engage, as a result of which the actuators are forcibly guided along the guide rail.
  • the guide rails can also be designed as profile strips arranged next to the drive spindles, for example having a U-profile in cross section, which include a guide channel for receiving a radially outward-pointing guide lug of the actuators.
  • any torsional forces transmitted by the drive spindles to the actuators can be effectively compensated, so that unwanted rotational movements of the actuators around the spindle longitudinal axes are avoided, so that subsequently high actuating speeds and, at the same time, smooth and quiet running of the disk carriers along the drive spindles can be achieved.
  • the disk carriers and/or their actuators have a braking device for the actuators and/or the guide rails.
  • a braking device can be designed, for example, as a simple shoe brake whose contact force can be adjusted.
  • the actuators engages around the associated actuator as a braking device under pretension.
  • the braking effect is achieved as a result of the frictional forces between the actuator and the drive spindle caused by the preload.
  • the actuator forming the braking device can have a peripheral opening so that the actuator does not completely enclose the drive spindle, but grips it in the sense of an elastic clamp under pretension, with the inner diameter of the actuator gripping the spindle on the peripheral side being smaller than the outer diameter of the spindle in accordance with the friction force to be achieved
  • Drive spindle can be selected.
  • the slats be displaceable beyond the closed position against the force of a restoring element.
  • This can be achieved, for example, in that the slat is connected to the slat carrier via a further connecting piece in addition to the slat holder, with the connecting pin engaging in an elongated hole in the slat carrier and being fixed as a restoring element via a rubber buffer inserted in the elongated hole, for example.
  • the lamella holder itself is not rigidly connected to the pivoting unit or the lamella carrier, but can be pivoted at least to such an extent about its pivot axis running transversely to the longitudinal direction of the spindle that the additional connecting piece can move within the elongated hole against the spring force.
  • the slats have additional play in the closed position, so that jamming of overlapping slats is effectively avoided.
  • the additional attachment point of the slat on the slat carrier ensures that the slat is firmly seated both during the adjustment process and in the rest position, so that unwanted vibrations caused, for example, by wind and the resulting rattling noises of the slats are prevented.
  • the invention also relates to a horizontal blind with two drive devices according to the invention, which are arranged at a distance from one another to accommodate slats running horizontally between the drive devices.
  • the two drive devices are synchronized with one another via a common drive.
  • the common drive can comprise a drive shaft, for example, with each of the drive devices being drive-connected to this drive shaft via an angular gear.
  • the respective angle gear assigned to a drive device can comprise an intermediate shaft in order to be able to operate the two drive spindles of a drive device in the same direction.
  • the common drive includes a main drive shaft, which is drive-connected to the bevel gears of the respective drive devices via an intermediate gear and two separate intermediate shafts.
  • the pinion of one of the drive spindles of a drive device that is in engagement with the gear or a pinion of the gear or, in the case of a planetary gear, the gear itself can have a freewheel.
  • a horizontal blind according to the invention has a drive device 1 according to the invention with two parallel adjusting drives 2, 3, which form drive spindles 4, 5.
  • the drive spindles 4, 5 include adjustment gears 6, 7, each of which has gear pitches that decrease towards a rest position.
  • the drive devices 1 also have disk carriers 8, which each comprise two actuators 9, 10, which can be displaced relative to one another in the longitudinal direction of the actuator drives 2, 3 and which each engage in one of the two adjustment gears.
  • the actuators 9, 10 are shifted to each other in the longitudinal direction of the drive spindles 4, 5, that the slats 11 are arranged in an open position.
  • the actuators 9, 10 each have guide lugs 12, which engage radially in the actuating gear 6, 7 and are designed, for example, as guide pins, as is shown in 2 can be seen.
  • the disk carriers 8 comprise a length-adjustable pivoting unit that is articulated on the two actuators 9, 10.
  • the swivel unit has a connecting body 13 with a guide sleeve 14 and a blade holder 15 .
  • the connecting body 13 forms a connecting bracket.
  • the connecting body 13 designed as a connecting bracket also comprises a first bracket section 16 facing the actuator 9 and slidably passing through the guide sleeve 14 , the guide sleeve 14 being rotatably mounted on the actuator 9 via a connecting pin 17 .
  • At right angles to the first bracket section 16 runs a rotatably connected via a bracket clamp seat 18 to the actuator 10 second bracket section 19.
  • a third bracket section 20 runs at right angles to the second bracket section 19 and at an angle of about 45° to the plane spanned by the first and second bracket sections 16, 19 corresponds to the first bracket section 16, inclined by about 45 °.
  • the lamella 11 is inclined by 45° in relation to the longitudinal direction of the spindle and, as a result of a displacement of the two actuators 9, 10 relative to one another from the position in 1 shown open position in the 3 shown closed position can be shifted.
  • the slat holders 15 are aligned in the longitudinal direction of the drive spindles 4, 5, so that the slats 11 partially overlap one another.
  • the actuators 2, 3 are drive-connected to an angular gear 23 and each have a pinion 24, 25.
  • the pinions 24, 25 are each engaged with a pinion 26, 27 of a gear shaft 28 of the bevel gear 23.
  • the transmission shaft 28 comprises a hollow shaft section 29 and an inner shaft section 30 located in the hollow shaft section 29 , the pinion 26 being connected to the hollow shaft section 29 and the pinion 27 being connected to the inner shaft section 30 .
  • the inner shaft section 30 can have a driving pin so that after about one revolution of the inner shaft section 30 the hollow shaft section 29 gripped by the driving pin also rotates.
  • a plate pack 31 brought together to form a rest position is shown as an example, this being made possible as a result of the lower gear pitch of the actuating gears 6, 7 in the respective end sections 21, 22 of the drive spindles 4, 5.
  • FIG 5 and 6 an alternative embodiment of a drive device 1 according to the invention of a horizontal blind is shown.
  • the disk carrier 8 having the pivoting unit comprises a connecting body 13 with an elongated hole 32.
  • the connecting pin 17 articulated on the actuator 10 can be displaced within the elongated hole 32.
  • a connecting pin which engages in a corresponding pin recess 33 of the blade 11 can be provided as the blade holder 15 .
  • the disk carrier 8 can have a restoring element inserted in an elongated hole, for example designed as a rubber buffer 34, and an additional connecting piece to the disk 11, also inserted into the elongated hole.
  • the lamella holder 15, which is designed as a square connecting pin in the alternative embodiment shown, can be pivoted about its connecting axis running transversely to the longitudinal direction of the spindle at least to such an extent that the additional connecting piece for the lamella 11 can move within the elongated hole against the spring force.
  • the slat carrier 8 and/or their actuators 9, 10 can have a braking device.
  • one of the actuators 9 can enclose the associated spindle 4 as a braking device under pretension in the sense of a clamp, as shown in FIG 6 emerges.
  • the actuators 9 , 10 can be guided via one or more guide rails 35 running parallel to the actuators 2 , 3 .
  • the guide rails 35 can, for example, have an essentially U-shaped cross-sectional profile, so that they form a guide channel into which the corresponding guide lugs 36 of the actuators 9, 10 engage and these can thus be positively guided.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)

Description

Die Erfindung bezieht sich auf eine Antriebsvorrichtung für Horizontaljalousien, mit auf parallel verlaufenden Stelltrieben geführten Lamellenträgern, wobei die Stelltriebe Antriebsspindeln bilden, die je einen spiralförmig umlaufenden Stellgang mit zu einer Ruhestellung hin abnehmender Steigung aufweisen und wobei die Lamellenträger je zwei in Längsrichtung der Stelltriebe zueinander verlagerbare Stellglieder umfassen, die jeweils in einen der beiden Stellgänge eingreifen.The invention relates to a drive device for horizontal blinds, with lamellae carriers guided on parallel adjusting drives, the adjusting drives forming drive spindles, each of which has a spirally revolving adjusting gear with a gradient that decreases towards a rest position, and the lamellae carriers each having two mutually displaceable in the longitudinal direction of the adjusting drives Include actuators, each engaging in one of the two gears.

Aus dem Stand der Technik sind Antriebsvorrichtungen für Horizontaljalousien bekannt, die auf parallel verlaufenden, beispielsweise Zugbänder oder -schnüre als Zugmittel umfassenden Stelltrieben geführte Lamellenträger aufweisen. Zufolge der auf den Stelltrieben geführten Lamellenträger können die horizontal verlaufenden Lamellen einerseits in Vertikalrichtung bewegt sowie dicht in eine Ruhestellung zu einem Lamellenpaket zusammengeführt werden und andererseits um eine horizontal verlaufende Längsachse zwischen einer Offen- und einer Schließstellung verschwenkt werden. Nachteilig ist daran allerdings, dass die dort eingesetzten Zugmittel einem hohen Verschleiß unterliegen, sodass aufgrund unterschiedlich verschlissener bzw. unterschiedlich gelängter Zugmittel ein gleichmäßiges Verschwenken sowie Bewegen der Lamellenträger in Vertikalrichtung verhindert wird. Es besteht daher nicht nur die Gefahr gerissener oder sich verwickelnder Zugmittel, sondern auch einer erhöhten Fehleranfälligkeit aufgrund sich verkeilender Lamellen. Zudem lässt sich bei derartigen Antriebsvorrichtungen aufgrund der konstruktiven Gegebenheiten der Austausch einzelner Lamellen kaum sinnvoll vornehmen.Drive devices for horizontal venetian blinds are known from the prior art, which have slat carriers guided on parallel actuating drives, which include, for example, tie rods or cords as traction means. As a result of the disk carriers guided on the actuators, the horizontally running disks can be moved in the vertical direction and brought together tightly in a rest position to form a disk pack and, on the other hand, pivoted about a horizontal longitudinal axis between an open and a closed position. The disadvantage of this, however, is that the traction means used there are subject to high wear, so that uniform pivoting and movement of the disk carriers in the vertical direction is prevented due to differently worn or differently lengthened traction means. There is therefore not only the danger of torn or tangled traction means, but also an increased susceptibility to errors due to wedged slats. In addition, in the case of such drive devices, the replacement of individual lamellae can hardly be carried out in a sensible manner due to the structural conditions.

Darüber hinaus sind auf dem Gebiet von Vertikaljalousien Antriebsvorrichtungen bekannt, die auf parallel verlaufenden Antriebsspindeln geführte, Querstreben aufweisende Lamellenträger umfassen ( WO 1991004390 A1 ). Die Querstreben der jeweiligen Lamellenträger stehen mit den spiralförmig umlaufenden Gewindegängen beider Spindeln schwerkraftsbedingt im Eingriff und können durch die Rotationsbewegung der Spindeln entlang deren horizontal verlaufender Längsrichtung bewegt werden. Um die Lamellen bei komplett geöffneter Jalousie dicht in eine Ruhestellung zu einem Lamellenpaket zusammenführen zu können, weisen die Antriebsspindeln an ihren Endabschnitten eine kleinere Gewindesteigung im Vergleich zu ihren Mittelabschnitten auf. Um die Lamellen zudem verschwenken zu können, ist eine der beiden Spindeln mit einem Freilaufmittel versehen, wodurch ein versetztes Anlaufen der Spindeln erreicht wird, das zu einem Verschwenken der in die Gewindegänge der Spindeln eingreifenden Querstreben der Lamellenträger führt. Nachteilig ist dabei allerdings, dass eine sichere Führung der Lamellenträger auf den Antriebsspindeln sowie eine gleichmäßige Ausrichtung der Lamellen selbst bei synchronisierbaren Antriebsspindeln nicht möglich ist, da die lediglich lose mit den Spindeln in Kontakt stehenden Querstreben in den Gewindegängen relativ leicht verrutschen können. Folglich können sich beispielsweise unmittelbar aufeinanderfolgende Lamellen zufolge ihrer zueinander schief gelegenen Ausrichtung verkeilen, was eine sachgemäße Funktion der Antriebsvorrichtung für Vertikaljalousien erheblich erschwert. Davon abgesehen sind derartige Antriebsvorrichtungen für Horizontaljalousien grundsätzlich nicht geeignet, zumal die Querstreben aus den Gewindegängen der dann vertikal angeordneten Antriebsspindeln sowohl in Ruhestellung als auch insbesondere bei einer Rotationsbewegung der Spindeln herausgleiten würden.In addition, in the field of vertical blinds, drive devices are known which comprise slat carriers which are guided on parallel drive spindles and have cross braces ( WO 1991004390 A1 ). The crossbars of the respective disk carriers are in engagement with the spirally encircling thread turns of both spindles due to the force of gravity and can be moved by the rotational movement of the spindles along their horizontally running longitudinal direction. In order to be able to bring the slats together tightly into a rest position to form a slat pack when the blind is completely open, the drive spindles have a smaller thread pitch at their end sections compared to their middle sections. In order to be able to swivel the slats, one of the two spindles is provided with a free-wheeling means, which causes the spindles to start offset, which leads to a swiveling of the cross struts of the slat carrier engaging in the threads of the spindles. The disadvantage here, however, is that reliable guidance of the disk carriers on the drive spindles and uniform alignment of the disks is not possible even with synchronizable drive spindles, since the cross braces, which are only loosely in contact with the spindles, can slip relatively easily in the threads. Consequently, for example, immediately following slats can become wedged as a result of their mutually skewed orientation, which makes it considerably more difficult for the drive device for vertical blinds to function properly. Apart from that, such drive devices are fundamentally unsuitable for horizontal blinds, especially since the transverse struts would slide out of the threads of the drive spindles, which are then arranged vertically, both in the rest position and, in particular, during a rotational movement of the spindles.

Weiters sind aus der US 3717195 A Antriebsvorrichtungen für Horizontaljalousien bekannt, die auf parallel verlaufenden Antriebsspindeln geführte Lamellenträger umfassen. Die Lamellenträger weisen je zwei als Führungskugeln ausgebildete Stellglieder auf, die jeweils in einen der beiden spiralförmig umlaufenden Stellgänge der Antriebsspindeln eingreifen, sodass die Stellglieder in Längsrichtung der Antriebsspindeln zueinander verlagerbar sind.Next are from the US 3717195 A Drive devices for horizontal blinds are known, which comprise slat carriers guided on parallel drive spindles. The disk carriers each have two actuators designed as guide balls, which each engage in one of the two spirally revolving adjustment gears of the drive spindles, so that the actuators can be displaced relative to one another in the longitudinal direction of the drive spindles.

Der Erfindung liegt somit die Aufgabe zugrunde, eine Antriebsvorrichtung für Horizontaljalousien der eingangs geschilderten Art so auszugestalten, dass bei geringem Fertigungs- und Montageaufwand eine hohe Lebensdauer und Funktionstüchtigkeit erreicht und insbesondere trotz geringem Fertigungs- und Montageaufwand sowie geringem Bauteilbedarf ein besonders zuverlässiges Verschwenken der Lamellen ermöglicht wird.The invention is therefore based on the object of designing a drive device for horizontal blinds of the type described above in such a way that low manufacturing and assembly effort achieved a long service life and functionality and in particular despite low manufacturing and assembly effort and low component requirements, a particularly reliable pivoting of the slats is made possible.

Die Erfindung löst die gestellte Aufgabe dadurch, dass die Lamellenträger eine an den beiden Stellgliedern angelenkte, längenverstellbare Schwenkeinheit aufweisen und dass die Antriebsspindeln unabhängig voneinander verstellbar sind.The invention solves the problem in that the disk carriers have a length-adjustable swivel unit that is articulated to the two actuators and that the drive spindles can be adjusted independently of one another.

Zufolge dieser Merkmale nehmen bei einer Rotationsbewegung der Antriebsspindeln die in die Stellgänge eingreifenden Stellglieder die Schubkräfte der jeweiligen Stellgangflanken auf, wodurch die Stellglieder translatorisch entlang der Spindellängsrichtung bewegt werden. Die Stellglieder des Lamellenträgers liegen dabei nicht schwerkraftsbedingt auf den Stellgangböden auf, sondern greifen in die Stellgänge im Sinne einer Führungs- und Positionierungshilfe ein, wodurch sämtliche Lamellenträger der erfindungsgemäßen Antriebsvorrichtung unabhängig von der Rotationsrichtung der Spindeln gleichmäßig entlang dieser geführt werden. Dadurch wird ein unerwünschtes Schiefstellen und folglich die Gefahr eines Verkeilens der Lamellen wirksam vermieden. Aufgrund der sicheren und gleichmäßigen Führung der Lamellenträger zufolge der in den Stellgang eingreifenden Stellglieder wird zudem bei einer Steigungsverringerung bzw. generell bei einer, insbesondere auch sprunghaften Steigungsänderung der Stellgänge ein unerwünschtes Verrutschen der Stellglieder und somit ein Verkippen der Lamellen verhindert, wodurch ein sicheres Zusammenführen der Lamellen zu einem Lamellenpaket sowie ein erneutes Herausführen der Lamellen aus der Ruhestellung problemlos erfolgen kann. Um eine sichere Führung der Lamellenträger unabhängig von den Betriebsbedingungen zu ermöglichen, sind die zwei Stellglieder eines Lamellenträgers in Längsrichtung der Stelltriebe bzw. der Antriebsspindeln zueinander verlagerbar. Unter einer Verlagerbarkeit wird im Sinne der Erfindung verstanden, dass die beiden Stellglieder eines Lamellenträgers entlang der Antriebsspindellängsrichtung unabhängig voneinander und relativ zueinander bewegt werden bzw. sowohl auf gleicher Spindelhöhe oder in Spindellängsrichtung versetzt zueinander positioniert werden können. Die beiden Stellglieder sind insbesondere zwei eigenständige Einheiten, die keine starre, sondern beispielsweise eine gelenkige oder flexible Verbindung miteinander aufweisen. Zufolge dieser Merkmale wird eine wechselseitige Beeinflussung der beiden Stellglieder und somit die Gefahr von verkeilten Lamellen insbesondere bei unterschiedlichen Rotationsgeschwindigkeiten der Antriebsspindeln und somit unterschiedlichen Translationsbewegungen der Stellglieder vermieden. Die jeweiligen Lamellen können über einen Lamellenhalter am Lamellenträger befestigt sein, wobei der Lamellenhalter beispielsweise einen Aufnahmeschlitz für die einzusetzende Lamelle aufweist oder aber einen Verbindungszapfen bildet, der in eine entsprechende Zapfenaufnahme der Lamelle eingreift. Um trotz einer für günstige Betriebsbedingungen notwendigen hohen Formstabilität der Antriebsspindeln eine gute Bearbeitbarkeit der Spindeln, insbesondere zur Ausbildung des an der Spindelaußenseite verlaufenden Spindelgewindes, zu ermöglichen, können die Antriebsspindeln so ausgebildet sein, dass diese einen kunststoffummantelten Metallkern aufweisen. Günstige Fertigungsbedingungen ergeben sich, wenn die Kunststoffummantelung mehrere, beispielsweise spritzgegossene oder 3D-gedruckte Spindelsegmente aufweist, die vorzugsweise miteinander verklebt oder auf sonstige Weise stoffschlüssig miteinander verbunden werden können.As a result of these features, during a rotational movement of the drive spindles, the actuators engaging in the adjustment gears absorb the thrust forces of the respective adjustment gear flanks, as a result of which the actuators are moved translationally along the longitudinal direction of the spindle. The actuators of the disk carrier do not rest on the floor of the aisles due to gravity, but rather engage in the aisles in the sense of a guidance and positioning aid, whereby all disk carriers of the drive device according to the invention are guided uniformly along them, regardless of the direction of rotation of the spindles. This effectively avoids unwanted skewing and consequently the risk of the slats becoming wedged. Due to the safe and even guidance of the disk carriers due to the actuators engaging in the adjustment gear, undesired slipping of the actuators and thus tilting of the disks is also prevented when the pitch is reduced or generally in the event of a sudden change in the pitch of the adjustment gears, which means that the lamellas can be brought together safely Lamellae to a lamellae package and a re-extraction of the slats from the rest position can be done without any problems. In order to enable the disk carrier to be reliably guided independently of the operating conditions, the two actuators of a disk carrier can be displaced in relation to one another in the longitudinal direction of the adjusting drives or the drive spindles. Within the meaning of the invention, displaceability is understood to mean that the two actuators of a disk carrier are moved independently of one another and relative to one another along the drive spindle longitudinal direction, or both at the same spindle height or positioned offset to one another in the longitudinal direction of the spindle. The two actuators are, in particular, two independent units that do not have a rigid connection, but instead have an articulated or flexible connection with one another. As a result of these features, a mutual influence of the two actuators and thus the risk of wedged slats is avoided, especially at different rotational speeds of the drive spindles and thus different translational movements of the actuators. The respective slats can be fastened to the slat carrier via a slat holder, the slat holder having, for example, a receiving slot for the slat to be inserted or else forming a connecting pin which engages in a corresponding pin seat of the slat. In order to enable good machinability of the spindles, in particular for the formation of the spindle thread running on the outside of the spindle, despite the high dimensional stability of the drive spindles required for favorable operating conditions, the drive spindles can be designed in such a way that they have a plastic-coated metal core. Favorable manufacturing conditions result when the plastic casing has a plurality of, for example, injection-molded or 3D-printed spindle segments, which are preferably glued to one another or can be connected to one another in a materially bonded manner in some other way.

Um besonders günstige Betriebsbedingungen zu ermöglichen, können die Stellglieder radial in den Stellgang eingreifende Führungsnasen aufweisen. Die vorzugsweise wenigstens drei Führungsnasen verhindern wirksam ein Verkippen der Stellglieder und nehmen gleichzeitig die Schubkräfte der Antriebsspindeln auf. Es kann beispielsweise vorgesehen sein, dass die Stellglieder die Antriebsspindel umfangsseitig umschließen und wenigstens drei innenseitig radial in die Stellgänge der Antriebsspindeln hineinragende Führungsstifte aufweisen. Im Falle von drei Führungsstiften können diese umfangsseitig mit jeweils einem Winkel von 120° zueinander versetzt angeordnet sind.In order to enable particularly favorable operating conditions, the actuators can have guide lugs which engage radially in the actuating gear. The preferably at least three guide lugs effectively prevent tilting of the actuators and at the same time absorb the thrust forces of the drive spindles. It can be provided, for example, that the actuators enclose the drive spindle on the peripheral side and have at least three guide pins on the inside that protrude radially into the adjustment gears of the drive spindles. In the case of three guide pins, these can be arranged offset from one another on the circumferential side, each at an angle of 120°.

Mit der Länge der Schwenkeinheit ist insbesondere die kürzeste Verbindungslänge einer durch die Schwenkeinheit verlaufenden, gedachten Verbindungslinie zwischen den beiden Stellgliedern gemeint, wobei die Verbindungslänge beispielsweise über eine einfache Teleskopverbindung, eine in einer Führungshülse verlaufende Verbindungstange, eine verstellbare Verbindungsschiene oder über einen in einem Langloch eines Verbindungskörpers der Schwenkeinheit verschiebbaren und an einem der Stellglieder angelenkten Bolzen variiert werden kann. Dadurch, dass die Antriebsspindeln unabhängig voneinander verstellbar sind, können die jeweiligen Stellglieder eines Lamellenträgers je nachdem, mit welchen Geschwindigkeiten und / oder Drehrichtungen die beiden Antriebsspindeln rotieren, zueinander in Spindellängsrichtung verlagert bzw. relativ zueinander in Spindellängsrichtung bewegt werden. Indem beispielsweise lediglich eine der Antriebsspindeln kurzzeitig betrieben wird, können die Stellglieder von einer Offenstellung der Lamellen zu einer Schließstellung der Lamellen verlagert werden et vice versa. Die Verlagerung der Stellglieder zueinander kann aber auch bei laufendem Betrieb beider Antriebsspindeln erfolgen, beispielsweise indem eine der Antriebsspindeln kurzzeitig auf eine höhere Rotationsgeschwindigkeit beschleunigt wird, sodass bei gleichzeitiger Bewegung der Lamellen entlang der Spindellängsrichtung auch ein Verschwenken ermöglicht wird. Um hohe Stellgeschwindigkeiten zu erreichen, empfiehlt es sich, den Lamellenhalter so über einen Verbindungszapfen mit der Schwenkeinheit bzw. dem Lamellenträger zu verbinden, dass sich eine gemeinsame, durch den Querschnittsmittelpunkt einer Antriebsspindel verlaufende Verbindungslinie zwischen Stellglied, Schwenkeinheit und Verbindungszapfen ergibt. Um die Antriebsspindeln auch bei einer gemeinsamen Antriebswelle und einem gemeinsamen Getriebe unabhängig voneinander betreiben zu können, können Freilaufmittel vorgesehen sein. Beispielsweise kann das mit dem Getriebe in Eingriff stehende Ritzel der einen Spindel fest mit dieser verbunden sein, wohingegen das ebenfalls mit dem Getriebe in Eingriff stehende Ritzel der anderen Spindel derart mit dieser verbunden ist, dass ein Rotationsspiel von in etwa einer Umdrehung ermöglicht wird. Dabei kann die Steigung der Stellgänge so ausgestaltet sein, dass eine Verlagerung eines Stellgliedes bei einer Umdrehung ein Verschwenken der zugeordneten Lamelle von einer Schließstellung in eine Offenstellung ermöglicht. Ebenso kann eines der Ritzel des Getriebes selbst ein Freilaufmittel aufweisen. Somit können trotz eines gemeinsamen Antriebs die Spindeln versetzt anlaufen, wodurch ein Verschwenken der Lamellen realisiert wird. In diesem Zusammenhang ergeben sich besonders große Verstellwinkel, wenn der Mitnehmer des Freilaufmittels über ein Planetengetriebe so angetrieben wird, dass sich bei hoher Stellgeschwindigkeit der beiden Stelltriebe eine verhältnismäßig geringe Relativgeschwindigkeit zwischen dem Mitnehmer und dem freilaufenden Stelltrieb ergibt.The length of the pivoting unit is in particular the shortest connection length of an imaginary connecting line running through the pivoting unit between the two actuators, whereby the connection length can be varied, for example, via a simple telescopic connection, a connecting rod running in a guide sleeve, an adjustable connecting rail or via a bolt that can be displaced in a slot in a connecting body of the pivoting unit and is articulated on one of the actuators. Since the drive spindles can be adjusted independently of one another, the respective actuators of a disk carrier can be displaced relative to one another in the longitudinal direction of the spindle or moved relative to one another in the longitudinal direction of the spindle, depending on the speeds and/or directions of rotation at which the two drive spindles rotate. By, for example, only one of the drive spindles being operated for a short time, the actuators can be shifted from an open position of the slats to a closed position of the slats, and vice versa. However, the displacement of the actuators relative to one another can also take place while both drive spindles are in operation, for example by briefly accelerating one of the drive spindles to a higher rotational speed, so that pivoting is also made possible with simultaneous movement of the slats along the spindle longitudinal direction. In order to achieve high actuating speeds, it is advisable to connect the blade holder to the swivel unit or the blade carrier via a connecting pin in such a way that there is a common connecting line running through the cross-section center of a drive spindle between the actuator, swivel unit and connecting pin. In order to be able to operate the drive spindles independently of one another even with a common drive shaft and a common gear, freewheel means can be provided. For example, the pinion of one spindle that is in engagement with the gear can be firmly connected to it, whereas the pinion of the other spindle that is also in engagement with the gear is connected to it in such a way that a rotational play of about one revolution is made possible. The gradient of the adjustment gears can be designed in such a way that a displacement of an actuator during one revolution allows the associated lamella to be pivoted from a closed position into an open position. Likewise, one of the pinions of the transmission itself can have a free-wheeling means. Thus, despite a common drive the spindles start offset, which means that the slats can be pivoted. In this context, particularly large adjustment angles result when the driver of the freewheeling means is driven via a planetary gear such that a relatively low relative speed between the driver and the freewheeling actuator results at a high actuating speed of the two actuators.

Um bei hohen Stellgeschwindigkeiten dennoch einen gleichmäßigen und leisen Lauf der erfindungsgemäßen Antriebsvorrichtung zu ermöglichen, kann vorgesehen sein, dass die Stellglieder über eine oder mehrere parallel zu den Stelltrieben verlaufende Führungsschienen geführt sind. Die Stellglieder können dabei so ausgebildet sein, dass diese jeweils einen Führungsschlitz aufweisen, in welche die Führungsleisten einer zwischen den beiden Antriebsspindeln parallel dazu verlaufenden Führungsschiene eingreifen, wodurch die Stellglieder entlang der Führungsschiene zwangsgeführt werden. Die Führungsschienen können aber auch als neben den Antriebsspindeln angeordnete, beispielsweise im Querschnitt ein U-Profil aufweisende Profilleisten ausgebildet sein, die einen Führungskanal zur Aufnahme von jeweils einer radial nach außen weisenden Führungsnase der Stellglieder umfassen. Zufolge dieser Maßnahmen können etwaige durch die Antriebsspindeln an die Stellglieder übertragene Torsionskräfte wirksam kompensiert werden, sodass unerwünschte Rotationsbewegungen der Stellglieder um die Spindellängsachsen vermieden werden, sodass in weiterer Folge hohe Stellgeschwindigkeiten und gleichzeitig ein gleichmäßiger und leiser Lauf der Lamellenträger entlang der Antriebsspindeln erreicht werden.In order nevertheless to enable the drive device according to the invention to run smoothly and quietly at high actuating speeds, provision can be made for the actuating elements to be guided via one or more guide rails running parallel to the actuating drives. The actuators can be designed in such a way that they each have a guide slot into which the guide rails of a guide rail running parallel thereto between the two drive spindles engage, as a result of which the actuators are forcibly guided along the guide rail. However, the guide rails can also be designed as profile strips arranged next to the drive spindles, for example having a U-profile in cross section, which include a guide channel for receiving a radially outward-pointing guide lug of the actuators. As a result of these measures, any torsional forces transmitted by the drive spindles to the actuators can be effectively compensated, so that unwanted rotational movements of the actuators around the spindle longitudinal axes are avoided, so that subsequently high actuating speeds and, at the same time, smooth and quiet running of the disk carriers along the drive spindles can be achieved.

Bei großen Steigungen der Stellgänge, die eine hohe Stellgeschwindigkeit ermöglichen, kann das Problem auftreten, dass die Stellglieder schwerkraftbedingt aus ihrer Sollposition herausgleiten, sodass die Position der Lamellen nicht mehr sicher vorgegeben werden kann. Es wird daher vorgeschlagen, dass die Lamellenträger und/oder deren Stellglieder eine Bremsvorrichtung für die Stelltriebe und / oder die Führungsschienen aufweisen. Eine solche Bremsvorrichtung kann beispielsweise als einfache, in ihrer Anstellkraft einstellbare Backenbremse ausgebildet sein.In the case of large gradients in the actuating gears, which enable a high actuating speed, the problem can arise that the actuating elements slide out of their desired position due to the force of gravity, so that the position of the slats can no longer be reliably specified. It is therefore proposed that the disk carriers and/or their actuators have a braking device for the actuators and/or the guide rails. Such a braking device can be designed, for example, as a simple shoe brake whose contact force can be adjusted.

In diesem Zusammenhang ergeben sich konstruktiv besonders günstige Bedingungen, wenn eines der Stellglieder den zugeordneten Stelltrieb als Bremsvorrichtung unter Vorspannung umgreift. Dadurch wird die Bremswirkung zufolge der durch die Vorspannung entstehenden Reibkräfte zwischen Stellglied und Antriebsspindel erzielt. Das die Bremsvorrichtung bildende Stellglied kann dabei eine umfangsseitige Öffnung aufweisen, sodass das Stellglied die Antriebsspindel nicht vollständig umschließt, sondern im Sinne einer elastischen Klammer unter Vorspannung umgreift, wobei der die Spindel umfangsseitig umgreifende Innendurchmesser des Stellgliedes entsprechend der zu erzielenden Reibkraft kleiner als der Außendurchmesser der Antriebsspindel gewählt werden kann. Zufolge dieser Maßnahmen kann somit der Fertigungs- und Montagaufwand der Vorrichtung verringert werden, da eine gesonderte Bremsvorrichtung, beispielsweise in Form einer Backenbremse, entfallen kann.In this context, structurally particularly favorable conditions arise when one of the actuators engages around the associated actuator as a braking device under pretension. As a result, the braking effect is achieved as a result of the frictional forces between the actuator and the drive spindle caused by the preload. The actuator forming the braking device can have a peripheral opening so that the actuator does not completely enclose the drive spindle, but grips it in the sense of an elastic clamp under pretension, with the inner diameter of the actuator gripping the spindle on the peripheral side being smaller than the outer diameter of the spindle in accordance with the friction force to be achieved Drive spindle can be selected. As a result of these measures, the manufacturing and assembly costs of the device can be reduced since a separate braking device, for example in the form of a shoe brake, can be omitted.

Um ein Ineinanderverkeilen der Lamellen bzw. ein Verklemmen derselben sowohl während des Stellvorganges als auch in einer Schließstellung zu vermeiden und somit ein sauberes Verschwenken der Lamellen zu ermöglichen, wird vorgeschlagen, dass die Lamellen über die Schließstellung hinaus gegen die Kraft eines Rückstellelementes verlagerbar sind. Dies kann beispielsweise dadurch erreicht werden, dass die Lamelle zusätzlich zum Lamellenhalter über ein weiteres Verbindungsstück mit dem Lamellenträger verbunden ist, wobei der Verbindungszapfen in ein Langloch des Lamellenträgers eingreift und über beispielsweise einen im Langloch eingesetzten Gummipuffer als Rückstellelement festgelegt wird. Dabei ist der Lamellenhalter selbst nicht starr mit der Schwenkeinheit bzw. dem Lamellenträger verbunden, sondern zumindest soweit um seine quer zur Spindellängsrichtung verlaufende Schwenkachse verschwenkbar, dass sich das zusätzliche Verbindungsstück innerhalb des Langlochs entgegen der Federkraft verschieben kann. Zufolge dieser Maßnahmen weisen die Lamellen ein zusätzliches Spiel in Schließstellung auf, sodass ein Verklemmen von sich überlappenden Lamellen wirksam vermieden wird. Ein weiterer Vorteil besteht darin, dass durch den zusätzlichen Befestigungspunkt der Lamelle am Lamellenträger ein fester Sitz der Lamelle sowohl während des Stellvorganges als auch in Ruhestellung gewährleistet ist, sodass unerwünschte, beispielsweise durch Wind hervorgerufene Schwingungen und sich daraus ergebende Klappergeräusche der Lamellen unterbunden werden.In order to prevent the slats from wedging or jamming both during the adjustment process and in a closed position and thus to enable the slats to pivot cleanly, it is proposed that the slats be displaceable beyond the closed position against the force of a restoring element. This can be achieved, for example, in that the slat is connected to the slat carrier via a further connecting piece in addition to the slat holder, with the connecting pin engaging in an elongated hole in the slat carrier and being fixed as a restoring element via a rubber buffer inserted in the elongated hole, for example. The lamella holder itself is not rigidly connected to the pivoting unit or the lamella carrier, but can be pivoted at least to such an extent about its pivot axis running transversely to the longitudinal direction of the spindle that the additional connecting piece can move within the elongated hole against the spring force. As a result of these measures, the slats have additional play in the closed position, so that jamming of overlapping slats is effectively avoided. A A further advantage is that the additional attachment point of the slat on the slat carrier ensures that the slat is firmly seated both during the adjustment process and in the rest position, so that unwanted vibrations caused, for example, by wind and the resulting rattling noises of the slats are prevented.

Die Erfindung bezieht sich auch auf eine Horizontaljalousie mit zwei erfindungsgemäßen Antriebsvorrichtungen, die mit Abstand zueinander zur Aufnahme von horizontal zwischen den Antriebsvorrichtungen verlaufenden Lamellen angeordnet sind. Die zwei Antriebsvorrichtungen sind über einen gemeinsamen Antrieb miteinander synchronisiert. Der gemeinsame Antrieb kann beispielsweise eine Antriebswelle umfassen, wobei jede der Antriebsvorrichtungen über ein Winkelgetriebe mit dieser Antriebswelle antriebsverbunden ist. Das jeweilige, einer Antriebsvorrichtung zugeordnete Winkelgetriebe kann eine Zwischenwelle umfassen, um die beiden Antriebsspindeln einer Antriebsvorrichtung gleichläufig betreiben zu können. Es ist auch denkbar, dass der gemeinsame Antrieb eine Hauptantriebswelle umfasst, die über ein Zwischengetriebe und zwei gesonderten Zwischenwellen mit den Winkelgetrieben der jeweiligen Antriebsvorrichtungen antriebsverbunden ist. Um die beiden Antriebsspindeln einer Antriebsvorrichtung zum Verschwenken der Lamellen unabhängig voneinander verstellen zu können, kann das mit dem Getriebe im Eingriff stehende Ritzel einer der Antriebsspindeln einer Antriebsvorrichtung oder ein Ritzel des Getriebes bzw. im Fall eines Planetengetriebes dieses selbst ein Freilaufmittel aufweisen.The invention also relates to a horizontal blind with two drive devices according to the invention, which are arranged at a distance from one another to accommodate slats running horizontally between the drive devices. The two drive devices are synchronized with one another via a common drive. The common drive can comprise a drive shaft, for example, with each of the drive devices being drive-connected to this drive shaft via an angular gear. The respective angle gear assigned to a drive device can comprise an intermediate shaft in order to be able to operate the two drive spindles of a drive device in the same direction. It is also conceivable that the common drive includes a main drive shaft, which is drive-connected to the bevel gears of the respective drive devices via an intermediate gear and two separate intermediate shafts. In order to be able to adjust the two drive spindles of a drive device for pivoting the slats independently of one another, the pinion of one of the drive spindles of a drive device that is in engagement with the gear or a pinion of the gear or, in the case of a planetary gear, the gear itself can have a freewheel.

In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen

Fig. 1
eine teilweise aufgerissene Seitenansicht einer erfindungsgemäßen Antriebsvorrichtung einer Horizontaljalousie in einer ersten Ausführungs-form mit in einer Offenstellung angeordneten Lamellen,
Fig. 2
einen Schnitt entlang der Linie II - II der Fig. 1,
Fig. 3
eine der Fig. 1 entsprechende Darstellung mit in einer Schließstellung angeordneten Lamellen und
Fig. 4
eine der Fig. 1 entsprechende Darstellung mit in einer Ruhestellung zu einem Lamellenpaket zusammengeführten Lamellen.
Fig. 5
eine teilweise aufgerissene Seitenansicht einer erfindungsgemäßen An-triebsvorrichtung einer Horizontaljalousie in einer alternativen Ausführungsform und
Fig. 6
einen Schnitt entlang der Linie VI - VI der Fig. 5 in einem größeren Maßstab.
In the drawing, the subject of the invention is shown as an example. Show it
1
a partially broken side view of a drive device according to the invention of a horizontal blind in a first embodiment with slats arranged in an open position,
2
a section along the line II - II of the 1 ,
3
one of the 1 corresponding representation with arranged in a closed position slats and
4
one of the 1 Corresponding representation with slats brought together in a rest position to form a slat pack.
figure 5
a partially broken side view of a driving device according to the invention of a horizontal blind in an alternative embodiment and
6
a section along the line VI - VI of the figure 5 on a larger scale.

Eine erfindungsgemäße Horizontaljalousie weist eine erfindungsgemäße Antriebsvorrichtung 1 mit zwei parallel verlaufenden Stelltrieben 2, 3 auf, die Antriebsspindeln 4, 5 bilden. Die Antriebsspindeln 4, 5 umfassen Stellgänge 6, 7, die jeweils zu einer Ruhestellung hin abnehmende Gangsteigungen aufweisen. Die Antriebsvorrichtungen 1 weisen zudem Lamellenträger 8 auf, die je zwei in Längsrichtung der Stelltriebe 2, 3 zueinander verlagerbare Stellglieder 9, 10 umfassen, die jeweils in einen der beiden Stellgänge eingreifen.A horizontal blind according to the invention has a drive device 1 according to the invention with two parallel adjusting drives 2, 3, which form drive spindles 4, 5. The drive spindles 4, 5 include adjustment gears 6, 7, each of which has gear pitches that decrease towards a rest position. The drive devices 1 also have disk carriers 8, which each comprise two actuators 9, 10, which can be displaced relative to one another in the longitudinal direction of the actuator drives 2, 3 and which each engage in one of the two adjustment gears.

In der Darstellung gemäß Fig. 1 sind die Stellglieder 9, 10 so zueinander in Längsrichtung der Antriebsspindeln 4, 5 verlagert, dass die Lamellen 11 in einer Offenstellung angeordnet sind.In the representation according to 1 the actuators 9, 10 are shifted to each other in the longitudinal direction of the drive spindles 4, 5, that the slats 11 are arranged in an open position.

Die Stellglieder 9, 10 weisen jeweils radial in den Stellgang 6, 7 eingreifende, beispielsweise als Führungsstifte ausgebildete Führungsnasen 12 auf, wie dies in Fig. 2 zu erkennen ist. Die Lamellenträger 8 umfassen eine an den beiden Stellgliedern 9, 10 angelenkte, längenverstellbare Schwenkeinheit. Die Schwenkeinheit weist dabei einen Verbindungkörper 13 mit einer Führungshülse 14 und einem Lamellenhalter 15 auf. In der in den Fig. 1 bis 4 gezeigten Ausführungsform bildet der Verbindungskörper 13 dabei einen Verbindungsbügel. Der gemäß jener Ausführungsform als Verbindungsbügel ausgebildete Verbindungskörper 13 umfasst zudem einen dem Stellglied 9 zugewandten und die Führungshülse 14 verschiebbar durchsetzenden ersten Bügelabschnitt 16, wobei die Führungshülse 14 über einen Verbindungszapfen 17 drehbar am Stellglied 9 gelagert ist. Im rechten Winkel zum ersten Bügelabschnitt 16 verlauft ein drehbar über einen Bügelklemmsitz 18 mit dem Stellglied 10 verbundener zweiter Bügelabschnitt 19. Im rechten Winkel zum zweiten Bügelabschnitt 19 sowie um etwa 45° geneigt zu der vom ersten und zweiten Bügelabschnitt 16, 19 aufgespannten Ebene verlauft ein dritter Bügelabschnitt 20. Dementsprechend ist der Lamellenhalter 15 bezüglich der Längsachse der Schwenkeinheit, die der Längsachse des ersten Bügelabschnittes 16 entspricht, um etwa 45 ° geneigt. Dies bedeutet, dass bei auf gleicher Spindelhöhe angeordneten Stellgliedern 9, 10 die Lamelle 11 um 45° gegenüber der Spindellängsrichtung geneigt ist und zufolge einer Verlagerung der beiden Stellglieder 9, 10 zueinander von der in Fig. 1 dargestellten Offenstellung in die in der Fig. 3 dargestellte Schließstellung verlagert werden kann. Dabei sind die Lamellenhalter 15 in Längsrichtung der Antriebsspindeln 4, 5 ausgerichtet, sodass die Lamellen 11 einander teilweise überlappen.The actuators 9, 10 each have guide lugs 12, which engage radially in the actuating gear 6, 7 and are designed, for example, as guide pins, as is shown in 2 can be seen. The disk carriers 8 comprise a length-adjustable pivoting unit that is articulated on the two actuators 9, 10. The swivel unit has a connecting body 13 with a guide sleeve 14 and a blade holder 15 . In the in the Figures 1 to 4 shown embodiment, the connecting body 13 forms a connecting bracket. The connecting body 13 designed as a connecting bracket according to that embodiment also comprises a first bracket section 16 facing the actuator 9 and slidably passing through the guide sleeve 14 , the guide sleeve 14 being rotatably mounted on the actuator 9 via a connecting pin 17 . At right angles to the first bracket section 16 runs a rotatably connected via a bracket clamp seat 18 to the actuator 10 second bracket section 19. A third bracket section 20 runs at right angles to the second bracket section 19 and at an angle of about 45° to the plane spanned by the first and second bracket sections 16, 19 corresponds to the first bracket section 16, inclined by about 45 °. This means that when the actuators 9, 10 are arranged at the same spindle height, the lamella 11 is inclined by 45° in relation to the longitudinal direction of the spindle and, as a result of a displacement of the two actuators 9, 10 relative to one another from the position in 1 shown open position in the 3 shown closed position can be shifted. The slat holders 15 are aligned in the longitudinal direction of the drive spindles 4, 5, so that the slats 11 partially overlap one another.

Die Stelltriebe 2, 3 sind mit einem Winkelgetriebe 23 antriebsverbunden und weisen jeweils ein Ritzel 24, 25 auf. Die Ritzel 24, 25 befinden sich im Eingriff mit je einem Ritzel 26, 27 einer Getriebewelle 28 des Winkelgetriebes 23. Gemäß der in den Fig. 1 bis 4 gezeigten Ausführungsform umfasst die Getriebewelle 28 einen Hohlwellenabschnitt 29 und einen im Hohlwellenabschnitt 29 liegenden Innenwellenabschnitt 30, wobei das Ritzel 26 mit dem Hohlwellenabschnitt 29 und das Ritzel 27 mit dem Innenwellenabschnitt 30 verbunden ist. Um die beiden Antriebsspindeln 2, 3 mit etwa einer Umdrehung versetzt anlaufen lassen zu können, kann der Innenwellenabschnitt 30 einen Mitnahmebolzen aufweisen, sodass nach etwa einer Umdrehung des Innenwellenabschnittes 30 der vom Mitnahmebolzen erfasste Hohlwellenabschnittes 29 ebenfalls mitrotiert. Um besonders große Verstellwinkel zu ermöglichen, empfiehlt es sich, die Winkelgetriebe 23 der jeweiligen Antriebsvorrichtungen 1 einer erfindungsgemäßen Horizontaljalousie über ein mit diesen verbundenes, zentrales Planetengetriebe zu synchronisieren. Dabei wird der Mitnehmer des Freilaufmittels über ein Planetengetriebe so angetrieben, dass sich bei hoher Stellgeschwindigkeit der beiden Stelltriebe 2, 3 eine verhältnismäßig geringe Relativgeschwindigkeit zwischen dem Mitnehmer und dem freilaufenden Stelltrieb 3 ergibt.The actuators 2, 3 are drive-connected to an angular gear 23 and each have a pinion 24, 25. The pinions 24, 25 are each engaged with a pinion 26, 27 of a gear shaft 28 of the bevel gear 23. According to the Figures 1 to 4 In the embodiment shown, the transmission shaft 28 comprises a hollow shaft section 29 and an inner shaft section 30 located in the hollow shaft section 29 , the pinion 26 being connected to the hollow shaft section 29 and the pinion 27 being connected to the inner shaft section 30 . In order to be able to start the two drive spindles 2, 3 offset by about one revolution, the inner shaft section 30 can have a driving pin so that after about one revolution of the inner shaft section 30 the hollow shaft section 29 gripped by the driving pin also rotates. In order to enable particularly large adjustment angles, it is advisable to synchronize the bevel gears 23 of the respective drive devices 1 of a horizontal blind according to the invention via a central planetary gear connected to them. The driver of the free-wheeling means is driven via a planetary gear in such a way that, when the actuating speed of the two actuators 2, 3 is high, there is a relatively low relative speed between the driver and the free-wheeling actuator 3.

In Fig. 4 wird beispielhaft ein zu einer Ruhestellung zusammengeführtes Lamellenpaket 31 gezeigt, wobei dies zufolge der geringeren Gangsteigung der Stellgänge 6, 7 in den jeweiligen Endabschnitten 21, 22 der Antriebsspindeln 4, 5 ermöglicht wird.In 4 a plate pack 31 brought together to form a rest position is shown as an example, this being made possible as a result of the lower gear pitch of the actuating gears 6, 7 in the respective end sections 21, 22 of the drive spindles 4, 5.

In den Fig. 5 und 6 wird eine alternative Auführungsform einer erfindungsgemäßen Antriebsvorrichtung 1 einer Horizontaljalousie gezeigt. Der die Schwenkeinheit aufweisende Lamellenträger 8 umfasst dabei einen Verbindungskörper 13 mit einem Langloch 32. Zur Längenverstellung der Schwenkeinheit ist der am Stellglied 10 angelenkte Verbindungszapfen 17 innerhalb des Langlochs 32 verschiebbar. Als Lamellenhalter 15 kann ein Verbindungszapfen vorgesehen sein, der in eine entsprechende Zapfenausnehmung 33 der Lamelle 11 eingreift.In the figure 5 and 6 an alternative embodiment of a drive device 1 according to the invention of a horizontal blind is shown. The disk carrier 8 having the pivoting unit comprises a connecting body 13 with an elongated hole 32. To adjust the length of the pivoting unit, the connecting pin 17 articulated on the actuator 10 can be displaced within the elongated hole 32. A connecting pin which engages in a corresponding pin recess 33 of the blade 11 can be provided as the blade holder 15 .

Wie in der Fig. 5 zudem angedeutet ist, kann der Lamellenträger 8 ein in einem Langloch eingesetztes, beispielsweise als Gummipuffer 34 ausgebildetes Rückstellelement sowie ein ebenfalls in das Langloch eingesetztes, zusätzliches Verbindungsstück zur Lamelle 11aufweisen. Der in der gezeigten alternativen Ausführungsform beispielhaft als Vierkant-Verbindungszapfen ausgebildete Lamellenhalter 15 kann um seine quer zur Spindellängsrichtung verlaufende Verbindungsachse zumindest soweit verschwenkbar sein, dass sich das zusätzliche Verbindungsstück zur Lamelle 11 innerhalb des Langlochs entgegen der Federkraft verschieben kann. Dadurch werden sowohl ein zusätzliches Schwenkspiel der Lamellen 11 als auch ein fester Sitz zufolge eines zusätzlichen Befestigungspunktes der Lamellen 11 erreicht.Like in the figure 5 is also indicated, the disk carrier 8 can have a restoring element inserted in an elongated hole, for example designed as a rubber buffer 34, and an additional connecting piece to the disk 11, also inserted into the elongated hole. The lamella holder 15, which is designed as a square connecting pin in the alternative embodiment shown, can be pivoted about its connecting axis running transversely to the longitudinal direction of the spindle at least to such an extent that the additional connecting piece for the lamella 11 can move within the elongated hole against the spring force. As a result, both an additional pivoting play of the slats 11 and a tight fit due to an additional attachment point of the slats 11 are achieved.

Um bei großen Steigungen der Stellgänge 6, 7, die eine hohe Stellgeschwindigkeit ermöglichen, die Position der Lamellen 11 dennoch sicher vorzugeben, können die Lamellenträger 8 und/oder deren Stellglieder 9, 10 eine Bremsvorrichtung aufweisen. Beispielsweise kann eines der Stellglieder 9 die zugeordnete Spindel 4 als Bremsvorrichtung unter Vorspannung im Sinne einer Klammer umgreifen, wie dies aus Fig. 6 hervorgeht.In order to safely specify the position of the slats 11 in the case of large gradients of the gears 6, 7, which enable a high setting speed, the slat carrier 8 and/or their actuators 9, 10 can have a braking device. For example, one of the actuators 9 can enclose the associated spindle 4 as a braking device under pretension in the sense of a clamp, as shown in FIG 6 emerges.

Damit bei hohen Stellgeschwindigkeiten dennoch ein gleichmäßiger und leiser Lauf der erfindungsgemäßen Antriebsvorrichtung 1 ermöglicht wird, können die Stellglieder 9, 10 über eine oder mehrere parallel zu den Stelltrieben 2, 3 verlaufende Führungsschienen 35 geführt sind. Die Führungsschienen 35 können beispielsweise ein im wesentlichen U-förmiges Querschnittsprofil aufweisen, sodass diese einen Führungskanal bilden, in den entsprechende Führungsnasen 36 der Stellglieder 9, 10 eingreifen und diese somit zwangsgeführt werden können.To ensure that the drive device 1 according to the invention runs smoothly and quietly at high actuating speeds, the actuators 9 , 10 can be guided via one or more guide rails 35 running parallel to the actuators 2 , 3 . The guide rails 35 can, for example, have an essentially U-shaped cross-sectional profile, so that they form a guide channel into which the corresponding guide lugs 36 of the actuators 9, 10 engage and these can thus be positively guided.

Um sowohl eine gute Formstabilität als auch Bearbeitbarkeit der Antriebsspindeln 4, 5 zu ermöglichen, können dieses einen kunststoffummantelten Metallkern 37 aufweisen.In order to enable both good dimensional stability and workability of the drive spindles 4, 5, they can have a plastic-coated metal core 37.

Claims (7)

  1. Drive device (1) for horizontal blinds, comprising slat carriers (8) which are guided on actuating drives (2, 3) which extend in parallel, wherein the actuating drives (2, 3) form drive spindles (4, 5) which each have a helically circumferential actuating gear (6, 7) with a pitch which decreases towards an inoperative position, and wherein the slat carriers (8) each comprise two actuating elements (9, 10) which can be displaced with respect to one another in the longitudinal direction of the actuating drives (2, 3) and which engage in each case into one of the two actuating gears (6, 7), characterised in that the slat carriers (8) have a longitudinally adjustable pivoting unit which is articulated to the two actuating elements (9, 10) and in that the drive spindles (4, 5) can be adjusted independently of one another.
  2. Drive device (1) as claimed in claim 1, characterised in that the actuating elements (9, 10) have guide lugs (12) which engage radially into the actuating gear (6, 7).
  3. Drive device according to claim 1 or 2, characterised in that the actuating elements (9, 10) are guided via one or a plurality of guide rails which extend in parallel with the actuating drives (2, 3).
  4. Drive device as claimed in any one of claims 1 to 3, characterised in that the slat carriers and/or the actuating elements (9, 10) thereof have a braking device for the actuating drives (2, 3) and/or the guide rails.
  5. Drive device as claimed in claim 4, characterised in that an actuating element (9) engages around the actuating drive (2), which is allocated thereto, as a braking device under pretension.
  6. Drive device as claimed in any one of claims 1 to 5, characterised in that the slats (11) can be displaced beyond the closed position against the force of a return element (34).
  7. Horizontal blind comprising two drive devices (1) as claimed in any one of the preceding claims, characterised in that the drive devices (1) are arranged at a spaced interval from one another for receiving slats (11) and are synchronised with one another via a common drive.
EP19218515.5A 2018-12-20 2019-12-20 Drive device for horizontal blinds Active EP3670818B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT511362018A AT521167B1 (en) 2018-12-20 2018-12-20 Drive device for horizontal blinds

Publications (2)

Publication Number Publication Date
EP3670818A1 EP3670818A1 (en) 2020-06-24
EP3670818B1 true EP3670818B1 (en) 2022-09-21

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ID=68502115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19218515.5A Active EP3670818B1 (en) 2018-12-20 2019-12-20 Drive device for horizontal blinds

Country Status (2)

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EP (1) EP3670818B1 (en)
AT (1) AT521167B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179882A (en) * 1938-09-20 1939-11-14 Durre Allen Blind
US3717195A (en) * 1971-05-14 1973-02-20 G Larranaga Automatic metal louvered safety blind
NO893651L (en) 1989-09-12 1991-03-13 Tore Lyngholm DEVICE FOR LAMEL PERSONS.
EP2113627B1 (en) * 2008-04-30 2016-06-01 Inmaculada Corella Monzón Mechanism for securing and activating closures with guidable and removable slats
EP2850260B1 (en) * 2013-06-07 2015-10-14 Renson Sunprotection-Screens NV Slat structure
KR20160073660A (en) * 2014-12-17 2016-06-27 주식회사 루버텍코리아 Rotating device is equipped with a slat louvered shutters

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EP3670818A1 (en) 2020-06-24
AT521167A4 (en) 2019-11-15
AT521167B1 (en) 2019-11-15

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