EP3821104A1 - Drive system driving a screen, and apparatus comprising such a system - Google Patents

Drive system driving a screen, and apparatus comprising such a system

Info

Publication number
EP3821104A1
EP3821104A1 EP19737745.0A EP19737745A EP3821104A1 EP 3821104 A1 EP3821104 A1 EP 3821104A1 EP 19737745 A EP19737745 A EP 19737745A EP 3821104 A1 EP3821104 A1 EP 3821104A1
Authority
EP
European Patent Office
Prior art keywords
attachment piece
drive system
actuator
screen
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.)
Granted
Application number
EP19737745.0A
Other languages
German (de)
French (fr)
Other versions
EP3821104B1 (en
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
Original Assignee
Somfy Activites SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Somfy Activites SA filed Critical Somfy Activites SA
Publication of EP3821104A1 publication Critical patent/EP3821104A1/en
Application granted granted Critical
Publication of EP3821104B1 publication Critical patent/EP3821104B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 screen drive system and a closing, blackout or sun protection installation comprising such a drive system.
  • a closing, blackout or sun 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 blades hinged together in the case of a roller shutter or awning fabric.
  • the installation also includes a winding shaft, for example a winding tube on which the rollable screen is fixed and wound up or a tree on which a cord or a screen lace is wound up.
  • the installation also includes a drive system comprising an actuator comprising an electric motor, the actuator driving the winding shaft in rotation to deploy or fold the screen. It is therefore moved opposite an opening in order to selectively close it.
  • weight of this screen exerts on the drive system a variable torque, 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 compensating spring is to accompany the gearmotor forming the actuator during the ascent of a fabric 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 fallback phase.
  • One end of the compensation spring must be integral with the part of the actuator which is rotated or else 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 rotating a screen, comprising an actuator, a winding tube, and a compensating spring.
  • the spring has one end immobilized on the actuator housing by a ring.
  • the aim 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 invention relates to a system for driving a screen, comprising an actuator intended to rotate a winding shaft associated with the screen, and a compensation spring, the compensation spring comprising:
  • the drive system comprises a casing containing the actuator and a hooking piece for the first end of the compensation spring, the hooking piece comprising a body of substantially cylindrical internal and external shape, this attachment piece 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.
  • the compensating spring is hooked by an intermediate piece which facilitates installation and ensures the immobilization of the fixed end of the compensating spring.
  • such a training system can incorporate one or more of the following characteristics, taken in any technically admissible combination:
  • the attachment piece includes an opening slot enabling the attachment piece to be opened by elastic deformation during a step of assembling the attachment piece on the casing.
  • the attachment piece comprises means for clamping the edges of the opening slot.
  • the attachment piece comprises gadroons on an internal surface, these gadroons having an inside diameter smaller than the outside diameter of the casing.
  • the attachment piece or the housing comprises a protruding shape cooperating with a complementary hollow shape of the housing or the attachment piece, blocking the attachment piece and the housing in rotation and translation relative to the central axis .
  • the attachment piece comprises a pin provided on an internal surface of the attachment piece, and intended to be housed in a hole provided on the housing.
  • the attachment piece comprises a shape provided on an outer surface indicating the angular position of the pin.
  • the attachment piece comprises a form of blocking and holding at least one turn of the compensation spring.
  • the attachment piece comprises a section of cylindrical external shape for guiding at least part of the length of the compensating spring comprising turns.
  • the invention also relates to a closing, concealment or sun protection installation, comprising a screen, a winding shaft associated with the screen and a drive system as mentioned above.
  • FIG. 1 is a schematic sectional view of an installation according to the invention.
  • FIG. 2 is a perspective view of a drive system according to the invention.
  • FIG. 3 is a perspective view of a fastener belonging to the drive system of Figure 2;
  • FIG. 4 is a perspective view from another angle of the attachment piece of Figure 3;
  • FIG. 5 is a perspective view of the attachment piece of Figure 3 mounted on a tube of the drive system of Figure 2;
  • FIG. 6 is a perspective view of the tube of Figure 5.
  • FIG. 1 and 2 show a drive system 1 of a screen 6, in particular a roll-up screen, such as a shutter, mounted in a frame of a door or window opening of a building.
  • the drive system 1 is part of a closing, concealment or sun protection installation 200, represented in FIG. 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 compensating 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 by means of a connecting piece or drive wheel 34.
  • the winding tube 5 is mounted with the possibility of rotation in the chassis 4 by means of bearings or bearings 42, 44.
  • the actuator 3 is also disposed along the central axis X. It comprises a casing or tubular casing 30, and housed in the tubular casing 30, a supply assembly 24, comprising for example accumulators or supply 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 bring the screen 6 back to a wound position.
  • the electric motor 33 of the actuator preferably a direct current motor, has a stator 37 fixed relative to the casing 30, and a rotor 38 driving, via the reduction gear, an output shaft 32.
  • the shaft outlet 32 drives the winding tube 5 via the wheel 34 rotatably fixed 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 relating, according to the movement orders received, the electrical supply to 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 projects outside the winding tube 5.
  • the head 36 of the actuator allows the support of the actuator 3 on the frame 4 and therefore the support of the winding tube 5 at a fixed part of the building s ur which is mounted the chassis 4.
  • the head 36 also allows the recovery of torque at the actuator outlet. It can 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 chassis 4 at the end opposite to the head 36 of the actuator on a shaft 40 of the chassis 4.
  • a hooking piece 9 is located on the tubular casing 30 and fixed in rotation and in translation relative to the tubular casing 30.
  • the compensating spring 7 can be constituted in a 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 shown in Figure 1 partially masked by the tubular housing 30, to simplify the figure.
  • the compensation spring 7 is fixed to fixing points of the drive system 1: on the one hand by a first end 71 to the attachment piece 9 secured to the casing 30 and on the other hand by a second end 72 to the drive wheel 34.
  • the attachment piece 9 is fixed to the casing 30 in a non-rotary 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 , by means of the attachment piece 9, while the second end 72 is connected to a rotary part of the actuator 3 or to the winding shaft 5.
  • the compensation spring 7 is shown not stretched 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 part 9 on the tubular casing 30.
  • the body 91 of the attachment part 9 surrounds the tubular housing 30 of the actuator when the attachment part 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 receive the screws 94 to lock the opening of the attachment piece 9. In a variant not shown, the attachment piece 9 may comprise fewer screws 94, or a greater number of screws 94. The use of two screws 94 is a additional safety if a screw becomes defective during tightening.
  • 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 internal diameter D98a less than an external diameter D30 of the casing 30.
  • lower is meant a difference in dimension sufficient for a induce a tightening by friction couple.
  • the difference in dimension between the diameter D98a and the diameter D30 can be from 1 to 3/10 th of a millimeter.
  • 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 relative to the casing 30.
  • the attachment piece 9 comprises a shape 102 provided on an outer surface indicating visually and / or touch the angular position of the pin 100.
  • This shape can take for example the shape of a notch. As a variant, this notch can also be combined with a zone of particular contrasting color.
  • the pin 100 and the hole 30a are hidden 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 includes 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 blocking and holding at least one turn 73 of the compensation spring 7, shown in broken lines in FIG. 3.
  • This form has 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 opposite along the central axis X and enclose the turn 73 so that it is immobilized along the central axis X.
  • the distance between the stops 108 and 110 can be a multiple of a spring pitch, and thus block several turns.
  • the attachment piece 9 comprises a section 1 12 of cylindrical external shape for guiding at least part of the length of the compensating spring 7 comprising turns.
  • This length can for example be equivalent to at least one turn 74, or two turns 74 and 75 as shown in FIG. 3, or a higher number of turns.
  • This cylindrical section allows the guiding 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 includes enough lost turns, clamped 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 11, they do not participate, like the rest of the turns, in the work of the compensation spring 7.
  • the attachment piece 9 is preferably made of plastic.
  • the tubular casing 30 of the actuator is preferably metallic, steel or aluminum.
  • the attachment piece 9 is slidably mounted on the tubular casing 30 and these are 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 only due to friction.
  • the stop in rotation and translation provided by the pin 100 which is housed in a hole in the tubular casing 30 allows the torque to be taken up if the friction torque is no longer sufficient, especially in the event of temperature variations and during time.
  • attachment piece 9 allows:
  • the axial locking and in angular position between the attachment piece 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 attached ball or a border or groove. It can thus be of different shapes, in particular cylindrical, square, polygonal, etc.
  • the hole 30a can be of different shapes compatible with its function.
  • the counter could be provided on the housing 30 while the hole could be provided on the attachment piece 9.
  • the attachment part 9 and the housing 30 comprise at least one protruding element or pin provided on the attachment part 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 piece 9 and the housing 30.
  • punctual or linear contacts longitudinally to the X axis and radially to the X axis to prevent relative translation along the X axis and relative rotation around the X axis.

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  • 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)

Abstract

Disclosed is a drive system (1) driving a screen (6), comprising an actuator (3) for rotationally driving a winding shaft (5) associated with the screen (6), and a compensation spring (7). The compensation spring (7) has a first end (71) that is connected to a stationary part of the actuator (3), and a second end (72) that is connected to a rotatable part of the actuator (3) or to the winding shaft (5). The drive system (1) comprises a housing (30) enclosing the actuator (3), and an attachment part (9) for attaching the first end (71) of the compensation spring (7), the attachment part (9) comprising a body having a substantially cylindrical inner and outer shape, said attachment part (9) surrounding the tubular housing (30) and being secured to the tubular housing (30) such that the attachment part (9) is prevented from rotating and moving translationally along a central axis (X) of the tubular housing (30).

Description

Système d’entraînement d’un écran et installation comprenant un tel système  Screen drive system and installation comprising such a system
La présente invention concerne un système d’entraînement d’un écran et une installation de fermeture, d’occultation ou de protection solaire comprenant un tel système d’entraînement. The present invention relates to a screen drive system and a closing, blackout or sun protection installation comprising such a drive system.
De manière classique, une installation de fermeture, d'occultation ou de protection solaire comprend un écran déplaçable entre deux positions dites de fin de course, en particulier un écran enroulable, tel qu’un un tablier souple, par exemple un tablier formé par des lames articulées entre elles dans le cas d’un volet roulant ou une toile de store. L’installation comprend également un arbre d’enroulement, par exemple un tube d’enroulement sur lequel est fixé et s’enroule l’écran enroulable ou un arbre sur lequel s’enroule un cordon ou une lacette de l’écran. L’installation comprend également un système d’entraînement comprenant un actionneur comprenant un moteur électrique, l’actionneur entraînant l’arbre d’enroulement en rotation pour déployer ou replier l’écran. Celui-ci est donc déplacé en regard d'une ouverture afin d'obturer sélectivement celle-ci. Le poids de cet écran (poids du tablier lui-même ou poids d’une barre dite « barre de charge » lestée, destinée à faciliter la descente d’une toile, sous l’effet du poids combiné de la toile et de la barre de charge) exerce sur le système d'entraînement un couple variable, notamment en fonction de la position de cet écran.  Conventionally, a closing, blackout or sun 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 blades hinged together in the case of a roller shutter or awning fabric. The installation also includes a winding shaft, for example a winding tube on which the rollable screen is fixed and wound up or a tree on which a cord or a screen lace is wound up. The installation also includes a drive system comprising an actuator comprising an electric motor, the actuator driving the winding shaft in rotation to deploy or fold the screen. It is therefore moved opposite an opening in order to selectively close it. The weight of this screen (weight of the apron itself or weight of a bar known as “weighted load bar”, intended to facilitate the descent of a canvas, under the effect of the combined weight of the canvas and the bar load) exerts on the drive system a variable torque, in particular depending on the position of this screen.
Dans une installation classique, le déroulement ou la descente de l’écran se faisant sous l’effet du poids de la partie déroulée de l’écran, la consommation électrique est minimale. En revanche, les efforts pour enrouler ou remonter l’écran sont conséquents et donc pénalisent la consommation électrique globale de l’installation.  In a conventional installation, the unwinding or lowering of the screen being effected by the weight of the unwound part of the screen, the power consumption is minimal. On the other hand, the efforts to roll up or raise the screen are substantial and therefore penalize the overall electrical consumption of the installation.
Il est connu dans l’art antérieur, pour diminuer la consommation électrique d’un système d’entraînement d’écran, d'utiliser des ressorts dits "de compensation" pour compenser au moins partiellement le couple variable créé par le tablier.  It is known in the prior art, to reduce the electrical consumption of a screen drive system, to use so-called "compensating" springs to at least partially compensate for the variable torque created by the deck.
Un tel ressort de compensation permet de transmettre un couple entre l’actionneur et l’arbre d’enroulement, ce ressort étant cinématiquement relié, par l'une de ses extrémités, avec une structure fixe et, par son autre extrémité, avec une partie mobile reliée à l'écran, en particulier reliée à l’arbre d’enroulement. Le ressort de compensation a pour but d’accompagner le motoréducteur formant l’actionneur pendant la remontée d’une toile ou d’un autre type d’écran. En particulier, lors d’au moins une partie de la descente de l’écran, le ressort est mis sous contrainte. L’énergie accumulée est alors libérée lors d’au moins une partie de la phase de repli de l’écran.  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 compensating spring is to accompany the gearmotor forming the actuator during the ascent of a fabric 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 fallback phase.
Une extrémité du ressort de compensation doit être solidaire de la partie de l’actionneur qui est mise en rotation ou bien d’un élément cinématiquement lié, et l’autre extrémité doit être solidaire d’une partie fixe de l’actionneur ou bien d’un élément cinématiquement lié. Dans les systèmes connus, l’accroche sur la partie fixe du moteur du ressort de compensation peut être améliorée. One end of the compensation spring must be integral with the part of the actuator which is rotated or else 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. In known systems, the grip on the fixed part of the motor of the compensation spring can be improved.
WO 03/083245 et EP 3 070 255 décrivent des systèmes d’entrainement en rotation d’un écran, comprenant un actionneur, un tube d’enroulement, et un ressort de compensation. Le ressort a une extrémité immobilisée sur le boîtier de l’actionneur par une bague.  WO 03/083245 and EP 3,070,255 describe systems for rotating a screen, comprising an actuator, a winding tube, and a compensating spring. The spring has one end immobilized on the actuator housing by a ring.
Le but de l’invention est de proposer un nouveau système d’entraînement dont l’accroche du ressort de compensation sur la partie fixe de l’actionneur est réalisée de façon plus pratique et fiable.  The aim 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.
A cet effet, l’invention concerne un système d’entraînement d’un écran, comprenant un actionneur destiné à entraîner en rotation un arbre d’enroulement associé à l’écran, et un ressort de compensation, le ressort de compensation comportant :  To this end, the invention relates to a system for driving a screen, comprising an actuator intended to rotate a winding shaft associated with the screen, and a compensation spring, the compensation spring comprising:
- une première extrémité reliée à une partie fixe de l’actionneur, et  - a first end connected to a fixed part of the actuator, and
- une seconde extrémité reliée à une partie rotative de l’actionneur ou à l’arbre d’enroulement  - a second end connected to a rotating part of the actuator or to the winding shaft
Ce système est caractérisé en ce que le système d’entraînement comprend un carter renfermant l’actionneur et une pièce d’accroche de la première extrémité du ressort de compensation, la pièce d’accroche comprenant un corps de forme intérieure et extérieure sensiblement cylindrique, cette pièce d’accroche entourant le carter tubulaire et étant fixée sur le carter tubulaire de manière non rotative et non-mobile en translation selon un axe central du carter tubulaire.  This system is characterized in that the drive system comprises a casing containing the actuator and a hooking piece for the first end of the compensation spring, the hooking piece comprising a body of substantially cylindrical internal and external shape, this attachment piece 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.
Grâce à l’invention, le ressort de compensation est accroché par une pièce intermédiaire ce qui facilite l’installation et assure l’immobilisation de l’extrémité fixe du ressort de compensation.  Thanks to the invention, the compensating spring is hooked by an intermediate piece which facilitates installation and ensures the immobilization of the fixed end of the compensating spring.
Selon des aspects avantageux mais non obligatoires de l’invention, un tel système d’entraînement peut incorporer une ou plusieurs des caractérisitiques suivantes, prises selon toute combinaison techniquement admissible :  According to advantageous but not compulsory aspects of the invention, such a training system can incorporate one or more of the following characteristics, taken in any technically admissible combination:
- La pièce d’accroche comprend une fente d’ouverture permettant l’ouverture de la pièce d’accroche par déformation élastique lors d’une étape d’assemblage de la pièce d’accroche sur le carter.  - The attachment piece includes an opening slot enabling the attachment piece to be opened by elastic deformation during a step of assembling the attachment piece on the casing.
- La pièce d’accroche comprend des moyens de serrage de bords de la fente d’ouverture.  - The attachment piece comprises means for clamping the edges of the opening slot.
- La pièce d'accroche comprend des godrons sur une surface interne, ces godrons ayant un diamètre intérieur inférieur au diamètre extérieur du carter. - La pièce d'accroche ou le carter comprend une forme protubérante coopérant avec une forme en creux complémentaire du carter ou de la pièce d'accroche, bloquant la pièce d’accroche et le carter en rotation et translation par rapport à l’axe central. - The attachment piece comprises gadroons on an internal surface, these gadroons having an inside diameter smaller than the outside diameter of the casing. - The attachment piece or the housing comprises a protruding shape cooperating with a complementary hollow shape of the housing or the attachment piece, blocking the attachment piece and the housing in rotation and translation relative to the central axis .
- La pièce d'accroche comprend un pion prévu sur une surface interne de la pièce d’accroche, et prévu pour se loger dans un trou prévu sur le carter.  - The attachment piece comprises a pin provided on an internal surface of the attachment piece, and intended to be housed in a hole provided on the housing.
- La pièce d'accroche comprend une forme prévue sur une surface extérieure indiquant la position angulaire du pion.  - The attachment piece comprises a shape provided on an outer surface indicating the angular position of the pin.
- La pièce d’accroche comprend une forme de blocage et de maintien d’au moins une spire du ressort de compensation.  - The attachment piece comprises a form of blocking and holding at least one turn of the compensation spring.
- La pièce d’accroche comprend une section de forme externe cylindrique de guidage d’au moins une partie de la longueur du ressort de compensation comprenant des spires.  - The attachment piece comprises a section of cylindrical external shape for guiding at least part of the length of the compensating spring comprising turns.
L’invention concerne également une installation de fermeture, d’occultation ou de protection solaire, comprenant un écran, un arbre d’enroulement associé à l’écran et un système d’entraînement tel que mentionné ci-dessus.  The invention also relates to a closing, concealment or sun protection installation, comprising a screen, a winding shaft associated with the screen and a drive system as mentioned above.
L’invention sera mieux comprise et d’autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre, faite à titre d’exemple non limitatif en référence aux dessins annexés dans lesquels :  The invention will be better understood and other advantages thereof will appear more clearly in the light of the description which follows, given by way of nonlimiting example with reference to the appended drawings in which:
- La figure 1 est une vue en coupe schématique d’un installation conforme à l’invention ;  - Figure 1 is a schematic sectional view of an installation according to the invention;
- La figure 2 est une vue en perspective d’un système d’entraînement conforme à l’invention ;  - Figure 2 is a perspective view of a drive system according to the invention;
- La figure 3 est une vue en perspective d’une pièce d’accroche appartenant au système d’entraînement de la figure 2 ;  - Figure 3 is a perspective view of a fastener belonging to the drive system of Figure 2;
- La figure 4 est une vue en perspective sous un autre angle de la pièce d’accroche de la figure 3 ;  - Figure 4 is a perspective view from another angle of the attachment piece of Figure 3;
- La figure 5 est une vue en perspective de la pièce d’accroche de la figure 3 montée sur un tube du système d’entraînement de la figure 2 ;  - Figure 5 is a perspective view of the attachment piece of Figure 3 mounted on a tube of the drive system of Figure 2;
- La figure 6 est une vue en perspective du tube de la figure 5.  - Figure 6 is a perspective view of the tube of Figure 5.
Les figures 1 et 2 représentent un système d’entraînement 1 d’un écran 6, notamment un écran enroulable, tel qu’un volet roulant, monté dans un encadrement d'une ouverture de porte ou de fenêtre d'un bâtiment. Le système d’entraînement 1 fait partie d’une installation de fermeture, d’occultation ou de protection solaire 200, représentée sur la figure 1 , et qui comprend l’écran 6, un châssis 4, et un arbre d’enroulement sous forme d’un tube d’enroulement 5 de l’écran enroulable 6. Le système d’entraînement 1 comprend un actionneur 3 destiné à entraîner en rotation le tube d’enroulement 5, et un ressort 7 de compensation transmettant au tube d’enroulement 5 un couple délivré par l’actionneur 3. Figures 1 and 2 show a drive system 1 of a screen 6, in particular a roll-up screen, such as a shutter, mounted in a frame of a door or window opening of a building. The drive system 1 is part of a closing, concealment or sun protection installation 200, represented in FIG. 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 compensating spring 7 transmitting to the winding tube 5 a torque delivered by the actuator 3.
On définit un axe central X ou axe de référence du système d’entraînement 1 , qui est un axe longitudinal du tube d’enroulement 5, de l’actionneur 3 et du ressort de compensation 7 en configuration assemblée. Dans ce qui suit, les termes « axial » et « radial » sont employés en référence à cet axe central X.  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. In what follows, the terms “axial” and “radial” are used with reference to this central axis X.
L’actionneur 3 est monté au moins partiellement à l’intérieur du tube d’enroulement 5 et entraîne celui-ci en rotation par l’intermédiaire d’une pièce de liaison ou roue d’entraînement 34. Le tube d’enroulement 5 est monté avec possibilité de rotation dans le châssis 4 par l’intermédiaire de paliers ou roulements 42, 44. L’actionneur 3 est disposé également le long de l'axe central X. Il comprend une enveloppe ou carter tubulaire 30, et logés dans le carter tubulaire 30, un ensemble d’alimentation 24, comprenant par exemple des accumulateurs ou des piles d'alimentation 26, une unité électronique de pilotage 31 , un moteur électrique 33, ainsi qu’un réducteur et un frein (non représentés). Alternativement, l’ensemble d’alimentation 24 peut être logé dans un deuxième carter tubulaire, connecté au carter tubulaire 30 dans laquelle se trouve le moteur électrique 33. Le ressort de compensation 7, travaillant en torsion autour de l'axe central X, est monté autour du carter tubulaire 30 et agit pour ramener l’écran 6 vers une position enroulée.  The actuator 3 is mounted at least partially inside the winding tube 5 and drives the latter in rotation by means of a connecting piece or drive wheel 34. The winding tube 5 is mounted with the possibility of rotation in the chassis 4 by means of bearings or bearings 42, 44. The actuator 3 is also disposed along the central axis X. It comprises a casing or tubular casing 30, and housed in the tubular casing 30, a supply assembly 24, comprising for example accumulators or supply batteries 26, an electronic control unit 31, an electric motor 33, as well as a reduction gear and a brake (not shown). Alternatively, 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 bring the screen 6 back to a wound position.
Le moteur électrique 33 de l’actionneur 3, préférentiellement un moteur à courant continu, présente un stator 37 fixe par rapport au carter 30, et un rotor 38 entraînant, par l'intermédiaire du réducteur, un arbre de sortie 32. L'arbre de sortie 32 entraîne le tube d'enroulement 5 par l'intermédiaire de la roue 34 fixée en rotation sur l’arbre de sortie 32 et sur le tube d’enroulement 5. L’unité électronique de pilotage 31 assure le fonctionnement du moteur électrique 33 en mettant en relation, selon les ordres de déplacement reçus, l’alimentation électrique des accumulateurs ou piles 26 et le moteur électrique 33. Dans ce mode de réalisation, l'actionneur 3 comporte une tête 36, fermant une extrémité du carter 30, et qui fait saillie à l'extérieur du tube d'enroulement 5. La tête 36 de l'actionneur permet le support de l’actionneur 3 sur le châssis 4 et par conséquent le support du tube d'enroulement 5 au niveau d’une partie fixe du bâtiment sur laquelle est monté le châssis 4. La tête 36 permet de plus la reprise de couple en sortie d’actionneur. Elle peut être pourvue d'une trappe d'accès non représentée aux accumulateurs ou piles contenues dans le carter tubulaire 30. Le tube d’enroulement 5 est supporté sur le châssis 4 à l’extrémité opposée à la tête 36 de l’actionneur sur un arbre 40 du châssis 4.  The electric motor 33 of the actuator 3, preferably a direct current motor, has a stator 37 fixed relative to the casing 30, and a rotor 38 driving, via the reduction gear, an output shaft 32. The shaft outlet 32 drives the winding tube 5 via the wheel 34 rotatably fixed 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 relating, according to the movement orders received, the electrical supply to the accumulators or batteries 26 and the electric motor 33. In this embodiment, the actuator 3 comprises a head 36, closing one end of the casing 30, and which projects outside the winding tube 5. The head 36 of the actuator allows the support of the actuator 3 on the frame 4 and therefore the support of the winding tube 5 at a fixed part of the building s ur which is mounted the chassis 4. The head 36 also allows the recovery of torque at the actuator outlet. It can 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 chassis 4 at the end opposite to the head 36 of the actuator on a shaft 40 of the chassis 4.
Une pièce d’accroche 9 est située sur le carter tubulaire 30 et fixée en rotation et en translation par rapport au carter tubulaire 30. Le ressort de compensation 7 peut être constitué de façon connue par un ou plusieurs éléments élastiques, comme des ressorts de torsion, positionnés en série, pour obtenir les caractéristiques souhaitées en termes d'allongement et de raideur. Le ressort de compensation 7 est représenté sur la figure 1 partiellement masqué par le carter tubulaire 30, pour simplifier la figure. Le ressort de compensation 7 est fixé à des points de fixation du système d’entraînement 1 : d’une part par une première extrémité 71 à la pièce d’accroche 9 solidaire du carter 30 et d’autre part par une seconde extrémité 72 à la roue d'entraînement 34. A hooking piece 9 is located on the tubular casing 30 and fixed in rotation and in translation relative to the tubular casing 30. The compensating spring 7 can be constituted in a 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 shown in Figure 1 partially masked by the tubular housing 30, to simplify the figure. The compensation spring 7 is fixed to fixing points of the drive system 1: on the one hand by a first end 71 to the attachment piece 9 secured to the casing 30 and on the other hand by a second end 72 to the drive wheel 34.
La pièce d’accroche 9 est fixée sur le carter 30 de manière non rotative et non- mobile en translation selon l’axe central X. La première extrémité 71 du ressort de compensation 7 est donc reliée à une partie fixe de l’actionneur 3, par le biais de la pièce d’accroche 9, tandis que la seconde extrémité 72 est reliée à une partie rotative de l’actionneur 3 ou à l’arbre d’enroulement 5. Sur la figure 2, le ressort de compensation 7 est représenté non étiré et fixé uniquement à la roue d’entraînement 34 et non à la pièce d’accroche 9.  The attachment piece 9 is fixed to the casing 30 in a non-rotary 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 , by means of the attachment piece 9, while the second end 72 is connected to a rotary part of the actuator 3 or to the winding shaft 5. In FIG. 2, the compensation spring 7 is shown not stretched and fixed only to the drive wheel 34 and not to the attachment piece 9.
La pièce d’accroche 9 comprend un corps 91 de forme intérieure et extérieure sensiblement cylindrique, muni d’une fente d’ouverture 90 longitudinale, permettant l’ouverture de la pièce d’accroche 9 par déformation élastique lors d’une étape d’assemblage de la pièce d’accroche 9 sur le carter tubulaire 30. Le corps 91 de la pièce d’accroche 9 entoure le carter tubulaire 30 de l’actionneur lorsque la pièce d’accroche 9 est montée sur le carter 30.  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 part 9 on the tubular casing 30. The body 91 of the attachment part 9 surrounds the tubular housing 30 of the actuator when the attachment part 9 is mounted on the casing 30.
La pièce d’accroche 9 comprend des moyens de serrage de bords 92 de la fente d’ouverture 90. Ces moyens de serrage peuvent être formés par des vis 94. La pièce d’accroche 9 comprend deux logements 96 permettant d’accueillir les vis 94 pour verrouiller l’ouverture de la pièce d’accroche 9. En variante non représentée, la pièce d’accroche 9 peut comprend moins de vis 94, ou bien un nombre supérieur de vis 94. L’utilisation de deux vis 94 est une sécurité supplémentaire si jamais une vis devient défectueuse lors du vissage. Les moyens de serrage peuvent être radiaux ou tangentiels.  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 receive the screws 94 to lock the opening of the attachment piece 9. In a variant not shown, the attachment piece 9 may comprise fewer screws 94, or a greater number of screws 94. The use of two screws 94 is a additional safety if a screw becomes defective during tightening. The clamping means can be radial or tangential.
La pièce d'accroche 9 comprend des godrons 98a sur une surface interne 98, ces godrons 98a définissant une surface cylindrique ayant un diamètre intérieur D98a inférieur à un diamètre extérieur D30 du carter 30. Par « inférieur » on entend une différence de dimension suffisante pour un induire un serrage par couple de frottement. Par exemple, la différence de dimension entre le diamètre D98a et le diamètre D30 peut être de 1 à 3/10e de millimètre. The attachment piece 9 comprises gadroons 98a on an internal surface 98, these gadroons 98a defining a cylindrical surface having an internal diameter D98a less than an external diameter D30 of the casing 30. By "lower" is meant a difference in dimension sufficient for a induce a tightening by friction couple. For example, the difference in dimension between the diameter D98a and the diameter D30 can be from 1 to 3/10 th of a millimeter.
Le serrage opéré grâce aux vis 94 et aux godrons 98 permet d’assurer l’immobilisation en rotation et en translation de la pièce 9 en référence à l’axe central X. La pièce d'accroche 9 comprend un pion 100 prévu sur la surface interne 98 de la pièce d’accroche 9 et s’étendant vers l’intérieur de la pièce d’accroche. Le pion 100 est prévu pour se loger dans un trou 30a prévu sur le carter 30. Le pion 100 et le trou 30a permettent de renforcer l’immobilisation de la pièce d’accroche 9 par rapport au carter 30. The tightening effected by means of the screws 94 and the gadroons 98 ensures 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 relative to the casing 30.
S’il y a un besoin de réglage de la position axiale ou angulaire de la pièce d’accroche 9 par rapport au carter 30, il est possible de réaliser plusieurs trous sur le carter 30 pour positionner la pièce d’accroche 9 à différentes longueurs sur le carter 30 ou suivant différentes positions angulaires.  If there is a need to adjust the axial or angular position of the attachment piece 9 relative to the casing 30, it is possible to make several holes on the casing 30 to position the attachment piece 9 at different lengths on the casing 30 or according to different angular positions.
La pièce d'accroche 9 comprend une forme 102 prévue sur une surface extérieure indiquant de façon visuelle et/ou tactile la position angulaire du pion 100. Cette forme peut prendre par exemple la forme d’une encoche. En variante, cette encoche peut être également combinée à une zone de couleur particulière contrastante. En effet, lorsque la pièce d’accroche 9 est montée sur le carter tubulaire 30, le pion 100 et le trou 30a sont masqués par la pièce d’accroche 9 elle-même et sont donc non visibles depuis l’extérieur. La forme 102 facilite donc le positionnement du pion 100 en face du trou 30a.  The attachment piece 9 comprises a shape 102 provided on an outer surface indicating visually and / or touch the angular position of the pin 100. This shape can take for example the shape of a notch. As a variant, this notch can also be combined with a zone of particular contrasting color. In fact, when the attachment piece 9 is mounted on the tubular casing 30, the pin 100 and the hole 30a are hidden 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.
La pièce d’accroche 9 comprend une forme qui permet l’accroche du ressort de compensation 7. Cette forme comporte un crochet 104 prévu sur un méplat 106 de la pièce d’accroche 9. Ce crochet 104 a une forme complémentaire de la forme en crochet de l’extrémité 71. Dans l’exemple représenté, l’extrémité 71 du ressort de compensation 7 est un crochet arrondi, en forme de « U », mais l’extrémité 71 pourrait également être en forme de « L ».  The attachment piece 9 comprises a shape which allows the attachment of the compensation spring 7. This shape includes 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. In the example shown, 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".
La pièce d’accroche 9 comprend une forme de blocage et de maintien d’au moins une spire 73 du ressort de compensation 7, représentée en traits discontinus à la figure 3. Cette forme comporte des surfaces de butée 108 et 1 10 perpendiculaires à l’axe central X et qui forment des arrêts en translation selon cet axe. Les surfaces 108 et 1 10 sont opposées selon l’axe central X et enserrent la spire 73 de telle manière que celle-ci est immobilisée selon l’axe central X. Ainsi, on compense l’angle d’hélice du ressort de compensation 7 au niveau de cette spire 73. Alternativement, la distance entre les butées 108 et 1 10 peut être un multiple d’un pas de ressort, et ainsi bloquer plusieurs spires.  The attachment piece 9 comprises a form of blocking and holding at least one turn 73 of the compensation spring 7, shown in broken lines in FIG. 3. This form has 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 opposite along the central axis X and enclose the turn 73 so that it is immobilized along the central axis X. Thus, we compensate for the helix angle of the compensation spring 7 at the level of this turn 73. Alternatively, the distance between the stops 108 and 110 can be a multiple of a spring pitch, and thus block several turns.
La pièce d’accroche 9 comprend une section 1 12 de forme externe cylindrique de guidage d’au moins une partie de la longueur du ressort de compensation 7 comprenant des spires. Cette longueur peut être par exemple équivalente à au moins une spire 74, ou bien deux spires 74 et 75 comme cela ressort de la figure 3, ou bien un nombre plus élevé de spires.  The attachment piece 9 comprises a section 1 12 of cylindrical external shape for guiding at least part of the length of the compensating spring 7 comprising turns. This length can for example be equivalent to at least one turn 74, or two turns 74 and 75 as shown in FIG. 3, or a higher number of turns.
Cette section cylindrique permet le guidage d’un certain nombre de spires dites « perdues » du ressort de compensation 7 qui, en fonctionnement, se resserrent autour de la pièce d’accroche 9. Les surfaces de butées 108 et/ou 1 10 sont facultatives, si le ressort de compensation 7 comprend suffisamment de spires perdues, serrées sur la section cylindrique. This cylindrical section allows the guiding 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 includes enough lost turns, clamped on the cylindrical section.
Les spires « perdues » permettent de limiter les efforts sur le crochet 104. Etant contraintes par le diamètre de la section cylindrique 1 12, elles ne participent pas, comme le reste des spires, au travail du ressort de compensation 7.  The “lost” turns make it possible to limit the forces on the hook 104. Being constrained by the diameter of the cylindrical section 11, they do not participate, like the rest of the turns, in the work of the compensation spring 7.
La pièce d’accroche 9 est de préférence réalisée en matière plastique. Le carter tubulaire 30 de l’actionneur est de préférence métallique, en acier ou en aluminium.  The attachment piece 9 is preferably made of plastic. The tubular casing 30 of the actuator is preferably metallic, steel or aluminum.
La pièce d’accroche 9 est montée glissante sur le carter tubulaire 30 et ce sont les deux vis 94 qui permettent de serrer la pièce d’accroche 9 sur le carter tubulaire 30 par frottement. Sans le pion 100, la pièce d’accroche 9 serait fixe par rapport au carter tubulaire 30 uniquement grâce aux frottements. L’arrêt en rotation et translation fourni par le pion 100 qui vient se loger dans un trou du carter tubulaire 30 permet de reprendre le couple si jamais le couple de frottement n’est plus suffisant, notamment en cas de variations de température et au cours du temps.  The attachment piece 9 is slidably mounted on the tubular casing 30 and these are 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 only due to friction. The stop in rotation and translation provided by the pin 100 which is housed in a hole in the tubular casing 30 allows the torque to be taken up if the friction torque is no longer sufficient, especially in the event of temperature variations and during time.
L’utilisation de la pièce d’accroche 9 permet :  The use of attachment piece 9 allows:
- un réglage de la position axiale et/ou angulaire de la pièce d’accroche par rapport au carter 30 afin de s’adapter aux particularités de l’assemblage ; en particulier, le positionnement de la pièce d’accroche 9 peut permettre d’ajuster l’étirement du ressort de compensation 7.  - an adjustment of the axial and / or angular position of the attachment piece with respect to the casing 30 in order to adapt to the particularities of the assembly; in particular, the positioning of the attachment piece 9 can make it possible to adjust the stretching of the compensation spring 7.
- d’éviter le collage ou le sertissage du ressort de compensation 7 directement sur le carter tubulaire 30 de l’actionneur 3 ;  - Avoid bonding or crimping of the compensation spring 7 directly on the tubular casing 30 of the actuator 3;
- au pion 100 de reprendre le couple en cas de modification de forme ou taille de la pièce d’accroche 9 en matière plastique ou du carter tubulaire en métal, par exemple par dilatation ;  - the pin 100 to take the torque in case of change in shape or size of the hooking piece 9 of plastic or of the metal tubular casing, for example by expansion;
- un ajustement au plus près du carter tubulaire 30 métallique par le serrage des vis 94, de telle sorte que le diamètre maximum de la pièce d’accroche 9 soit inférieur au diamètre extérieur de la roue d’entraînement 34 ;  - An adjustment as close as possible to the metal tubular casing 30 by tightening the screws 94, so that the maximum diameter of the attachment piece 9 is less than the outside diameter of the drive wheel 34;
- de maintenir le ressort de compensation 7 en position axiale lors du passage de couple grâce aux butées 108 et 1 10.  - Maintain the compensation spring 7 in the axial position during the passage of torque by means of the stops 108 and 110.
Selon un mode de réalisation non représenté, le verrouillage axial et en position angulaire entre la pièce d’accroche 9 et le carter 30 peut être obtenu par des moyens différents du pion 100 et du trou 30a. En particulier, le pion 100 peut prendre la forme d’une bille rapportée ou d’une bordure ou rainure. Il peut ainsi être de différentes formes, notamment cylindrique, à section carrée, polygonale, etc. Le trou 30a peut être de différentes formes compatibles avec sa fonction. En variante, le pion pourrait être prévu sur le carter 30 tandis que le trou pourrait être prévu sur la pièce d’accroche 9. De façon plus générale, la pièce d’accroche 9 et le carter 30 comprennent au moins un élément protubérant ou pion prévu sur la pièce d’accroche 9 ou le carter 30, coopérant avec un élément en creux ou trou de forme complémentaire prévu sur l’autre pièce de façon à bloquer en rotation et en translation selon l’axe central X la pièce d’accroche 9 et le carter 30. Par coopération, on entend des contacts surfaciques, ponctuels ou linéiques longitudinalement à l’axe X et radialement à l’axe X pour empêcher la translation relative selon l’axe X et la rotation relative autour de l’axe X. According to an embodiment not shown, the axial locking and in angular position between the attachment piece 9 and the casing 30 can be obtained by means different from the pin 100 and the hole 30a. In particular, the pin 100 can take the form of an attached ball or a border or groove. It can thus be of different shapes, in particular cylindrical, square, polygonal, etc. The hole 30a can be of different shapes compatible with its function. Alternatively, the counter could be provided on the housing 30 while the hole could be provided on the attachment piece 9. More generally, the attachment part 9 and the housing 30 comprise at least one protruding element or pin provided on the attachment part 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 piece 9 and the housing 30. By cooperation means surface, punctual or linear contacts longitudinally to the X axis and radially to the X axis to prevent relative translation along the X axis and relative rotation around the X axis.

Claims

REVENDICATIONS
1. Système d’entraînement (1 ) d’un écran (6), comprenant un actionneur (3) destiné à entraîner en rotation un arbre d’enroulement (5) associé à l’écran (6), et un ressort de compensation (7), le ressort de compensation (7) comportant : 1. Drive system (1) of a screen (6), comprising an actuator (3) intended to drive in rotation a winding shaft (5) associated with the screen (6), and a compensation spring (7), the compensation spring (7) comprising:
- une première extrémité (71 ) reliée à une partie fixe de l’actionneur (3), et  - a first end (71) connected to a fixed part of the actuator (3), and
- une seconde extrémité (72) reliée à une partie rotative de l’actionneur (3) ou à l’arbre d’enroulement (5),  - a second end (72) connected to a rotary part of the actuator (3) or to the winding shaft (5),
caractérisé en ce que le système d’entraînement (1 ) comprend un carter (30) renfermant l’actionneur (3) et une pièce d’accroche (9) de la première extrémité (71 ) du ressort de compensation (7), la pièce d’accroche (9) comprenant un corps (91 ) de forme intérieure et extérieure sensiblement cylindrique, cette pièce d’accroche (9) entourant le carter tubulaire (30) et étant fixée sur le carter tubulaire (30) de manière non rotative et non-mobile en translation selon un axe central (X) du carter tubulaire (30).  characterized in that the drive system (1) comprises a casing (30) containing the actuator (3) and a hooking piece (9) of the first end (71) of the compensation spring (7), the attachment piece (9) comprising a body (91) of substantially cylindrical internal and external shape, this attachment piece (9) surrounding the tubular casing (30) and being fixed on the tubular casing (30) in a non-rotatable manner and non-movable in translation along a central axis (X) of the tubular casing (30).
2. Système d’entrainement selon la revendication 1 , caractérisé en ce que la pièce d’accroche (9) comprend une fente d’ouverture (90) permettant l’ouverture de la pièce d’accroche (9) par déformation élastique lors d’une étape d’assemblage de la pièce d’accroche (9) sur le carter (30). 2. Drive system according to claim 1, characterized in that the attachment piece (9) comprises an opening slot (90) allowing the opening of the attachment piece (9) by elastic deformation during 'A step of assembling the attachment piece (9) on the housing (30).
3. Système d’entrainement selon la revendication 2, caractérisé en ce que la pièce d’accroche (9) comprend des moyens de serrage (94) de bords (92) de la fente d’ouverture (90). 3. Drive system according to claim 2, characterized in that the attachment piece (9) comprises clamping means (94) of edges (92) of the opening slot (90).
4. Système d’entrainement selon l’une des revendications précédentes, caractérisé en ce que la pièce d'accroche (9) comprend des godrons (98a) sur une surface interne (98), ces godrons (98a) ayant un diamètre intérieur (D98a) inférieur au diamètre extérieur (D30) du carter (30). 4. Drive system according to one of the preceding claims, characterized in that the attachment piece (9) comprises gadroons (98a) on an internal surface (98), these gadroons (98a) having an internal diameter ( D98a) smaller than the outside diameter (D30) of the housing (30).
5. Système d’entrainement selon l’une des revendications précédentes, caractérisé en ce que la pièce d'accroche (9) ou le carter (30) comprend une forme protubérante (100) coopérant avec une forme en creux (30a) complémentaire du carter (30) ou de la pièce d'accroche (9), bloquant la pièce d’accroche (9) et le carter (30) en rotation et translation par rapport à l’axe central (X). 5. Drive system according to one of the preceding claims, characterized in that the attachment piece (9) or the housing (30) comprises a protruding shape (100) cooperating with a hollow shape (30a) complementary to the housing (30) or the attachment piece (9), blocking the attachment piece (9) and the housing (30) in rotation and translation relative to the central axis (X).
6. Système d’entrainement selon la revendication 5, caractérisé la pièce d'accroche (9) comprend un pion (100) prévu sur une surface interne (98) de la pièce d’accroche (9), et prévu pour se loger dans un trou (30a) prévu sur le carter (30). 6. Drive system according to claim 5, characterized in the attachment piece (9) comprises a pin (100) provided on an internal surface (98) of the attachment piece (9), and designed to be housed in a hole (30a) provided on the casing (30).
7. Système d’entrainement selon la revendication 6, caractérisé en ce que la pièce d'accroche (9) comprend une forme (102) prévue sur une surface extérieure indiquant la position angulaire du pion (100). 7. Drive system according to claim 6, characterized in that the attachment piece (9) comprises a shape (102) provided on an outer surface indicating the angular position of the pin (100).
8. Système d’entrainement selon l’une des revendications précédentes, caractérisé en ce que la pièce d’accroche (9) comprend une forme (108, 1 10) de blocage et de maintien d’au moins une spire (73) du ressort de compensation (7). 8. Drive system according to one of the preceding claims, characterized in that the attachment piece (9) comprises a form (108, 1 10) for locking and holding at least one turn (73) of the compensation spring (7).
9. Système d’actionnement selon l’une des revendications précédentes, caractérisé en ce que la pièce d’accroche (9) comprend une section (1 12) de forme externe cylindrique de guidage d’au moins une partie de la longueur du ressort de compensation (7) comprenant des spires (74, 75). 9. Actuation system according to one of the preceding claims, characterized in that the attachment piece (9) comprises a section (1 12) of cylindrical external shape for guiding at least a part of the length of the spring compensation (7) comprising turns (74, 75).
10. Installation (200) de fermeture, d’occultation ou de protection solaire, comprenant un écran (6), un arbre d’enroulement (5) associé à l’écran (6) et un système d’entraînement (1 ) selon l’une des revendications précédentes. 10. Installation (200) for closing, blackout or sun protection, comprising a screen (6), a winding shaft (5) associated with the screen (6) and a drive system (1) according to one of the preceding claims.
EP19737745.0A 2018-07-11 2019-07-10 Drive system driving a screen, and apparatus comprising such a system Active EP3821104B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1856376A FR3083818B1 (en) 2018-07-11 2018-07-11 SCREEN DRIVE SYSTEM AND INSTALLATION INCLUDING SUCH A SYSTEM
PCT/EP2019/068555 WO2020011861A1 (en) 2018-07-11 2019-07-10 Drive system driving a screen, and apparatus comprising such a system

Publications (2)

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

Family

ID=63579429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19737745.0A Active EP3821104B1 (en) 2018-07-11 2019-07-10 Drive system driving a screen, and apparatus comprising such a system

Country Status (3)

Country Link
EP (1) EP3821104B1 (en)
FR (1) FR3083818B1 (en)
WO (1) WO2020011861A1 (en)

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 (en) * 1992-10-30 1994-12-16 Roche Stores Awning device in the shape of a canopy.
JPH11101077A (en) * 1997-09-29 1999-04-13 Tostem Corp Shutter
FR2837865B1 (en) * 2002-03-28 2005-07-29 Simu MANUFACTURING MECHANISM AND CLOSURE OR SOLAR PROTECTION INSTALLATION INCORPORATING SUCH A DEVICE
DE102015103133A1 (en) * 2015-03-04 2016-09-08 Becker-Antriebe Gmbh Drives with torsion spring for a closing device of a building opening

Also Published As

Publication number Publication date
EP3821104B1 (en) 2023-04-05
FR3083818B1 (en) 2021-10-29
WO2020011861A1 (en) 2020-01-16
FR3083818A1 (en) 2020-01-17

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