EP3821104B1 - Antriebssystem zum antreiben eines bildschirms und vorrichtung mit einem solchen system - Google Patents

Antriebssystem zum antreiben eines bildschirms und vorrichtung mit einem solchen system Download PDF

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Publication number
EP3821104B1
EP3821104B1 EP19737745.0A EP19737745A EP3821104B1 EP 3821104 B1 EP3821104 B1 EP 3821104B1 EP 19737745 A EP19737745 A EP 19737745A EP 3821104 B1 EP3821104 B1 EP 3821104B1
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EP
European Patent Office
Prior art keywords
attachment part
drive system
screen
actuator
housing
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.)
Active
Application number
EP19737745.0A
Other languages
English (en)
French (fr)
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EP3821104A1 (de
Inventor
Diane MARCHAL
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 Activites SA
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Somfy Activites SA
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Publication date
Application filed by Somfy Activites SA filed Critical Somfy Activites SA
Publication of EP3821104A1 publication Critical patent/EP3821104A1/de
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Publication of EP3821104B1 publication Critical patent/EP3821104B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • E06B9/72—Operating devices or mechanisms, e.g. with electric drive comprising an electric motor positioned inside the roller
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/60—Spring drums operated only by closure members

Definitions

  • the present invention relates to a drive system for a screen and a closing, screening or solar protection installation comprising such a drive system.
  • a closing, screening or solar protection installation comprises a screen that can be moved between two so-called end-of-travel positions, in particular a roll-up screen, such as a flexible apron, for example an apron formed by slats hinged together in the case of a rolling shutter or an awning fabric.
  • the installation also comprises a winding shaft, for example a winding tube on which the roll-up screen is fixed and is rolled up, or a shaft on which a cord or lace of the screen is wound.
  • the installation also comprises a drive system comprising an actuator comprising an electric motor, the actuator driving the winding shaft in rotation to deploy or fold the screen. The latter is therefore moved facing an opening in order to selectively close the latter.
  • the weight of this screen exerts a variable torque on the drive system, in particular depending on the position of this screen.
  • Such a compensation spring makes it possible to transmit a torque between the actuator and the winding shaft, this spring being kinematically connected, by one of its ends, with a fixed structure and, by its other end, with a part mobile connected to the screen, in particular connected to the winding shaft.
  • the purpose of the compensation spring is to accompany the gear motor forming the actuator during the ascent of a canvas or other type of screen. In particular, during at least part of the descent of the screen, the spring is put under stress. The accumulated energy is then released during at least part of the screen folding phase.
  • One end of the compensation spring must be integral with the part of the actuator which is set in rotation or with a kinematically linked element, and the other end must be secured to a fixed part of the actuator or to a kinematically linked element.
  • the grip on the fixed part of the motor of the compensation spring can be improved.
  • WO 03/083245 And EP 3 070 255 describe systems for driving a screen in rotation, comprising an actuator, a winding tube, and a compensation spring.
  • the spring has one end secured to the actuator housing by a ring.
  • the object of the invention is to propose a new drive system in which the attachment of the compensation spring to the fixed part of the actuator is carried out in a more practical and reliable manner.
  • the drive system comprises a casing enclosing the actuator and a hooking part for the first end of the compensation spring, the hooking part comprising a body of substantially cylindrical internal and external shape, this part hook surrounding the tubular casing and being fixed on the tubular casing in a non-rotating manner and non-movable in translation along a central axis of the tubular casing.
  • attachment piece comprises an opening slot allowing the opening of the attachment piece by elastic deformation during a step of assembling the attachment piece on the casing.
  • the compensation spring is attached by an intermediate piece, which facilitates installation and ensures the immobilization of the fixed end of the compensation spring.
  • the invention also relates to a closing, screening or solar protection installation, comprising a screen, a winding shaft associated with the screen and a drive system as mentioned above.
  • THE figure 1 And 2 represent a drive system 1 of a screen 6, in particular a roll-up screen, such as a rolling shutter, mounted in a frame of a door or window opening of a building.
  • the drive system 1 is part of a closing, screening or solar protection installation 200, represented in the figure 1 , and which comprises the screen 6, a frame 4, and a winding shaft in the form of a winding tube 5 of the windable screen 6.
  • the drive system 1 comprises an actuator 3 intended to drive the winding tube 5 in rotation, and a compensation spring 7 transmitting to the winding tube 5 a torque delivered by the actuator 3.
  • a central axis X or reference axis of the drive system 1 is defined, which is a longitudinal axis of the winding tube 5, of the actuator 3 and of the compensation spring 7 in the assembled configuration.
  • the terms “axial” and “radial” are used with reference to this central axis X.
  • the actuator 3 is mounted at least partially inside the winding tube 5 and drives the latter in rotation via a connecting piece or drive wheel 34.
  • the winding tube 5 is mounted with the possibility of rotation in the frame 4 by means of bearings or bearings 42, 44.
  • the actuator 3 is also arranged along the central axis X. It comprises a casing or tubular casing 30, and housed in the tubular casing 30, a power supply assembly 24, comprising for example accumulators or power batteries 26, an electronic control unit 31, an electric motor 33, as well as a reduction gear and a brake (not shown).
  • the supply assembly 24 can be housed in a second tubular casing, connected to the tubular casing 30 in which the electric motor 33 is located.
  • the compensation spring 7, working in torsion around the central axis X is mounted around the tubular casing 30 and acts to return the screen 6 to a rolled-up position.
  • the electric motor 33 of the actuator preferably a direct current motor, has a stator 37 fixed with respect to the casing 30, and a rotor 38 driving, via the reducer, an output shaft 32.
  • the shaft output 32 drives the winding tube 5 via the wheel 34 fixed in rotation on the output shaft 32 and on the winding tube 5.
  • the electronic control unit 31 ensures the operation of the electric motor 33 by connecting, according to the displacement commands received, the power supply of the accumulators or batteries 26 and the electric motor 33.
  • the actuator 3 comprises a head 36, closing one end of the casing 30, and which protrudes outside the winding tube 5.
  • the head 36 of the actuator allows the support of the actuator 3 on the frame 4 and consequently the support of the winding tube 5 at the level of a fixed part of the building on which the frame 4 is mounted.
  • the head 36 also allows the torque to be taken up at the actuator output. It may be provided with an access hatch, not shown, to the accumulators or batteries contained in the tubular casing 30.
  • the winding tube 5 is supported on the frame 4 at the end opposite the head 36 of the actuator on a shaft 40 of frame 4.
  • An attachment piece 9 is located on the tubular casing 30 and fixed in rotation and in translation with respect to the tubular casing 30.
  • the compensation spring 7 can be constituted in known manner by one or more elastic elements, such as torsion springs, positioned in series, to obtain the desired characteristics in terms of elongation and stiffness.
  • the compensation spring 7 is represented on the figure 1 partially hidden by the tubular casing 30, to simplify the figure.
  • the compensation spring 7 is attached to attachment points of the drive system 1: on the one hand by a first end 71 to the attachment part 9 secured to the casing 30 and on the other hand by a second end 72 to drive wheel 34.
  • the attachment piece 9 is fixed to the casing 30 in a non-rotating manner and non-movable in translation along the central axis X.
  • the first end 71 of the compensation spring 7 is therefore connected to a fixed part of the actuator 3 , through the attachment piece 9, while the second end 72 is connected to a rotating part of the actuator 3 or to the winding shaft 5.
  • the compensation spring 7 is shown unstretched and fixed only to the drive wheel 34 and not to the attachment piece 9.
  • the attachment piece 9 comprises a body 91 of substantially cylindrical internal and external shape, provided with a longitudinal opening slot 90, allowing the opening of the attachment piece 9 by elastic deformation during a step of assembly of the attachment piece 9 on the tubular casing 30.
  • the body 91 of the attachment piece 9 surrounds the tubular casing 30 of the actuator when the attachment piece 9 is mounted on the casing 30.
  • the attachment piece 9 comprises means for clamping the edges 92 of the opening slot 90. These clamping means can be formed by screws 94.
  • the attachment piece 9 comprises two housings 96 making it possible to accommodate the screws 94 to lock the opening of the attachment part 9. In a variant not shown, the attachment part 9 may comprise fewer screws 94, or else a greater number of screws 94. The use of two screws 94 is a additional safety if ever a screw becomes defective during screwing.
  • the clamping means can be radial or tangential.
  • the attachment piece 9 comprises gadroons 98a on an internal surface 98, these gadroons 98a defining a cylindrical surface having an inside diameter D98a less than an outside diameter D30 of the casing 30.
  • lower is meant a difference in size sufficient to an induce tightening by friction torque.
  • the difference in dimension between the diameter D98a and the diameter D30 can be from 1 to 3/10 th of a millimeter.
  • the clamping carried out using the screws 94 and the gadroons 98 makes it possible to ensure the immobilization in rotation and in translation of the part 9 with reference to the central axis X.
  • the attachment piece 9 comprises a pin 100 provided on the internal surface 98 of the attachment piece 9 and extending towards the inside of the attachment piece.
  • the pin 100 is designed to be housed in a hole 30a provided on the casing 30.
  • the pin 100 and the hole 30a make it possible to reinforce the immobilization of the attachment piece 9 with respect to the casing 30.
  • the attachment piece 9 comprises a shape 102 provided on an outer surface visually and/or tactilely indicating the angular position of the pin 100.
  • This shape can for example take the form of a notch. As a variant, this notch can also be combined with a particular contrasting color zone. Indeed, when the attachment piece 9 is mounted on the tubular casing 30, the pin 100 and the hole 30a are masked by the attachment piece 9 itself and are therefore not visible from the outside. The shape 102 therefore facilitates the positioning of the pin 100 opposite the hole 30a.
  • the attachment piece 9 comprises a shape which allows the attachment of the compensation spring 7.
  • This shape comprises a hook 104 provided on a flat 106 of the attachment piece 9.
  • This hook 104 has a shape complementary to the shape in hook of the end 71.
  • the end 71 of the compensation spring 7 is a rounded hook, in the shape of a "U”, but the end 71 could also be in the shape of an "L”.
  • the attachment piece 9 comprises a form of locking and holding at least one turn 73 of the compensation spring 7, shown in broken lines in picture 3 .
  • This form includes abutment surfaces 108 and 110 perpendicular to the central axis X and which form stops in translation along this axis.
  • the surfaces 108 and 110 are opposed along the central axis X and enclose the coil 73 in such a way that the latter is immobilized along the central axis X.
  • the helix angle of the compensation spring 7 is compensated for level of this turn 73.
  • the distance between the stops 108 and 110 can be a multiple of a spring pitch, and thus block several turns.
  • the attachment part 9 comprises a section 112 of cylindrical external shape for guiding at least part of the length of the compensation spring 7 comprising turns.
  • This length can be for example equivalent to at least one turn 74, or two turns 74 and 75 as is apparent from the picture 3 , or a higher number of turns.
  • This cylindrical section allows the guidance of a certain number of so-called “lost” turns of the compensation spring 7 which, in operation, tighten around of the attachment piece 9.
  • the abutment surfaces 108 and/or 110 are optional, if the compensation spring 7 comprises enough lost turns, tightened on the cylindrical section.
  • the “lost” turns make it possible to limit the forces on the hook 104. Being constrained by the diameter of the cylindrical section 112, they do not participate, like the rest of the turns, in the work of the compensation spring 7.
  • the attachment part 9 is preferably made of plastic material.
  • the tubular housing 30 of the actuator is preferably metallic, steel or aluminum.
  • the attachment piece 9 is slidably mounted on the tubular casing 30 and it is the two screws 94 which make it possible to tighten the attachment piece 9 on the tubular casing 30 by friction. Without the pin 100, the attachment piece 9 would be fixed relative to the tubular casing 30 solely due to friction.
  • the stop in rotation and translation provided by the pin 100 which is housed in a hole of the tubular casing 30 makes it possible to resume the torque if ever the friction torque is no longer sufficient, in particular in the event of temperature variations and during time.
  • the axial locking and in angular position between the attachment part 9 and the casing 30 can be obtained by means different from the pin 100 and the hole 30a.
  • the pin 100 can take the form of an added ball or of an edge or groove. It can thus be of different shapes, in particular cylindrical, with a square section, polygonal, etc.
  • the hole 30a can be of different shapes compatible with its function.
  • the pawn could be provided on the casing 30 while the hole could be provided on the attachment piece 9.
  • the attachment piece 9 and the casing 30 comprise at least one protruding element or pin provided on the attachment piece 9 or the housing 30, cooperating with a hollow element or hole of complementary shape provided on the other part so as to block in rotation and in translation along the central axis X the attachment part 9 and the housing 30.
  • a protruding element or pin provided on the attachment piece 9 or the housing 30, cooperating with a hollow element or hole of complementary shape provided on the other part so as to block in rotation and in translation along the central axis X the attachment part 9 and the housing 30.

Landscapes

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

Claims (9)

  1. Antriebssystem (1) eines Schirms (6), umfassend einen Aktuator (3), der dazu bestimmt ist, eine Wickelwelle (5) in Drehung zu versetzen, die mit dem Schirm (6) assoziiert ist, und eine Ausgleichsfeder (7), die Ausgleichsfeder (7) umfassend:
    - ein erstes Ende (71), das mit einem festen Teil des Aktuators (3) verbunden ist, und
    - ein zweites Ende (72), das mit einem drehbaren Teil des Aktuators (3) oder mit der Wickelwelle (5) verbunden ist,
    das Antriebssystem (1) umfassend ein Gehäuse (30), das den Aktuator (3) und ein Einrastteil (9) des ersten Endes (71) der Ausgleichsfeder (7) umschließt, das Einrastteil (9) umfassend einen Körper (91) mit einer im Wesentlichen zylindrischen Innen- und Außenform, wobei dieses Einrastteil (9) das rohrförmige Gehäuse (30) umgibt und an dem rohrförmigen Gehäuse (30) nicht drehbar und nicht translatorisch beweglich entlang einer Mittelachse (X) des rohrförmigen Gehäuses (30) befestigt ist,
    wobei dieses System dadurch gekennzeichnet ist, dass das Einrastteil (9) einen Öffnungsschlitz (90) umfasst, der während eines Schritts des Zusammenbaus des Einrastteil (9) an dem Gehäuse (30) das Öffnen des Einrastteils (9) durch elastische Verformung ermöglicht.
  2. Antriebssystem nach Anspruch 1, dadurch gekennzeichnet, dass das Einrastteil (9) Einrichtungen (94) zum Festklemmen von Rändern (92) des Öffnungsschlitzes (90) umfasst.
  3. Antriebssystem nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Einrastteil (9) auf einer Innenfläche (98) Nocken (98a) aufweist, wobei die Nocken (98a) einen Innendurchmesser (D98a) aufweisen, der kleiner ist als der Außendurchmesser (D30) des Gehäuses (30).
  4. Antriebssystem nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Einrastteil (9) oder das Gehäuse (30) eine hervorstehende Form (100) umfasst, die mit einer komplementären vertieften Form (30a) des Gehäuses (30) oder des Einrastteils (9) zusammenwirkt und das Einrastteil (9) und das Gehäuse (30) gegen Drehung und Translation in Bezug auf die Mittelachse (X) blockiert.
  5. Antriebssystem nach Anspruch 4, dadurch gekennzeichnet, dass das Einrastteil (9) einen Stift (100) umfasst, der an einer Innenfläche (98) des Einrastteils (9) bereitgestellt ist und dazu bereitgestellt ist, in ein Loch (30a) zu passen, das an dem Gehäuse (30) bereitgestellt ist.
  6. Antriebssystem nach Anspruch 5, dadurch gekennzeichnet, dass das Einrastteil (9) eine Form (102) umfasst, die an einer Außenfläche bereitgestellt ist und die Winkelposition des Stifts (100) angibt.
  7. Antriebssystem nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Einrastteil (9) eine Form (108, 110) zum Blockieren und Halten von mindestens einer Windung (73) der Ausgleichsfeder (7) umfasst.
  8. Antriebssystem nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Einrastteil (9) einen Abschnitt (112) mit zylindrischer Außenform zum Führen von mindestens einem Teil der Länge der Ausgleichsfeder (7) mit Windungen (74, 75) umfasst.
  9. Schließ-, Verdunkelungs- oder Sonnenschutzanlage (200), umfassend einen Schirm (6), eine Wickelwelle (5), die mit dem Schirm (6) assoziiert ist, und ein Antriebssystem (1) nach einem der vorherigen Ansprüche.
EP19737745.0A 2018-07-11 2019-07-10 Antriebssystem zum antreiben eines bildschirms und vorrichtung mit einem solchen system Active EP3821104B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1856376A FR3083818B1 (fr) 2018-07-11 2018-07-11 Systeme d'entrainement d'un ecran et installation comprenant un tel systeme
PCT/EP2019/068555 WO2020011861A1 (fr) 2018-07-11 2019-07-10 Système d'entraînement d'un écran et installation comprenant un tel système

Publications (2)

Publication Number Publication Date
EP3821104A1 EP3821104A1 (de) 2021-05-19
EP3821104B1 true EP3821104B1 (de) 2023-04-05

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Application Number Title Priority Date Filing Date
EP19737745.0A Active EP3821104B1 (de) 2018-07-11 2019-07-10 Antriebssystem zum antreiben eines bildschirms und vorrichtung mit einem solchen system

Country Status (3)

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EP (1) EP3821104B1 (de)
FR (1) FR3083818B1 (de)
WO (1) WO2020011861A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11613926B2 (en) * 2018-01-16 2023-03-28 Crestron Electronics, Inc. Counterbalancing spring fasteners

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697558B1 (fr) * 1992-10-30 1994-12-16 Roche Stores Dispositif de store en forme de vélum.
JPH11101077A (ja) * 1997-09-29 1999-04-13 Tostem Corp シャッター
FR2837865B1 (fr) * 2002-03-28 2005-07-29 Simu Mecanisme de manoeuvre et installation de fermeture ou de protection solaire incorporant un tel dispositif
DE102015103133A1 (de) * 2015-03-04 2016-09-08 Becker-Antriebe Gmbh Antriebe mit Torsionsfeder für eine Schließvorrichtung einer Gebäudeöffnung

Also Published As

Publication number Publication date
FR3083818A1 (fr) 2020-01-17
WO2020011861A1 (fr) 2020-01-16
EP3821104A1 (de) 2021-05-19
FR3083818B1 (fr) 2021-10-29

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