EP3821102A1 - Drive system driving a screen, and apparatus comprising such a system - Google Patents
Drive system driving a screen, and apparatus comprising such a systemInfo
- Publication number
- EP3821102A1 EP3821102A1 EP19736731.1A EP19736731A EP3821102A1 EP 3821102 A1 EP3821102 A1 EP 3821102A1 EP 19736731 A EP19736731 A EP 19736731A EP 3821102 A1 EP3821102 A1 EP 3821102A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- turns
- drive system
- series
- spacing
- screen
- 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.)
- Pending
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
- E06B9/60—Spring drums operated only by closure members
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/40—Roller blinds
- E06B9/42—Parts or details of roller blinds, e.g. suspension devices, blind boxes
-
- 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
Definitions
- the invention relates to a screen drive system, in particular a roll-up screen.
- the invention also relates to a closing, screening 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.
- the object of the present invention is to provide a closing, screening or sun protection installation, as defined above, whose electrical consumption is low, in which for example, the actuator is supplied by an independent current source. , for example by cells or batteries.
- Such a compensation spring makes it possible to transmit a torque between the electric motor of 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 mobile part connected to the screen, in particular connected to the winding shaft.
- the purpose of the compensating spring is to accompany the geared motor forming the actuator during the reassembly 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.
- the compensation force exerted by the spring is adapted to the torque developed by the screen which influences the drive means.
- This torque is a function of the parameters relating to the screen drive system, for example the winding diameter, the dimensions of the screen, its specific weight and its position relative to the opening.
- the parameters of the compensation spring in particular the length of wire and / or the number of turns, are determined according to the parameter parameters relating to the drive system of the screen.
- means for adjusting the initial stress of a compensating spring can be provided.
- the electric motor itself can be used to pre-tension the compensating spring, in order to adjust the balance point of the screen.
- This balance point is preferably provided at a point differentiated from the end-of-travel positions of the screen, for example halfway through the screen.
- the compensating spring As the compensating spring is put under stress, that is to say, rolls up on itself and its diameter decreases, it becomes longer.
- the installation is therefore provided to stretch the spring in order to provide sufficient space for its fully wound configuration.
- the length of the installed compensation spring is greater than its length at rest and the turns of the installed compensation spring are non-contiguous. This solution is not entirely satisfactory because in this case the spring is not maintained, is unstable and generates noise.
- the radial space for the elongation or the displacement of the turns relative to the The axis of the winding tube is very limited.
- Contact between the coils of the spring and the actuator and / or the winding tube generates noise during operation, which is unacceptable.
- JP 2005 054374 describes a drive system for a screen comprising an electric actuator, a winding tube, and a spring, which is not a compensating spring because it is mounted outside the winding tube and not fixed between a fixed part of the actuator and the winding tube.
- the invention intends to remedy by proposing a new drive system whose compensating spring allows better performance and a reduction in noise.
- the invention relates to a screen drive system, comprising an actuator intended to drive in rotation a winding shaft associated with the screen, and a compensation spring.
- the compensation spring comprises a first series of turns having a first spacing and at least a second series of turns having a second spacing whose value is greater than the value of the first spacing.
- the compensating spring with spaced turns makes it possible to absorb the elongation of the spring under the action of the torque, while eliminating the noise problems caused by the uncontrollable deformation of the spring, without adding additional parts. It also accommodates the spring around a tube containing batteries, where there is little space, and saves space in length.
- such a training system can incorporate one or more of the following characteristics, taken in any technically admissible combination:
- the length of the compensation spring at rest is greater than the length of the compensation spring when it is installed in the drive system.
- the spacing of the turns of the second series is worth at least 105% of the spacing of the turns of the first series.
- the spacing of the turns of the second series is increased by at least 1 mm compared to the spacing of the turns of the first series.
- the second series of turns is located at one of the ends of the compensation spring, from a first end fixed to a first fixed part of the drive system and a second end fixed to a second part which is movable in rotation of the drive system .
- the second series of turns is located at a distance from the ends of the compensation spring, from a first end fixed to a first fixed part of the drive system and a second end fixed to a second part movable in rotation of the drive system.
- the compensation spring comprises several series of turns whose spacing is greater than the spacing of the turns of the first series.
- the compensation spring comprises a first end fixed to a hooking piece mounted on a tubular casing of the actuator and a second end fixed to an output shaft of the actuator, or to a drive wheel driven by the 'output shaft, intended to be fixed to the winding shaft.
- the invention also relates to a closing, blackout 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 view of a closure, concealment or sun protection installation comprising a drive system according to the invention
- FIG. 2 is a perspective view of a drive system according to the invention.
- FIG. 3 is a schematic side view of a compensating spring of the drive system of Figure 1 at rest;
- Figure 4 is a view similar to Figure 3, in a mounted configuration of the compensation spring.
- FIG. 1 represents a drive system 1 for 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 comprises an actuator 3 intended to drive in rotation a winding shaft 5 in the form of a winding tube for the windable screen 6, and a compensation spring 7 transmitting to the shaft winding 5 a torque delivered by the actuator 3.
- the screen 6, the winding shaft 5 and the drive system 1 form a closing, screening or sun protection installation 200.
- the installation 200 comprises also a chassis 4, supporting the winding shaft 5.
- a central axis X or reference axis of the drive system 1 is defined, which is a longitudinal axis of the winding shaft 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 reference 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 unit for control 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 compensating spring 7, working in torsion around the reference axis X, is mounted around the tubular casing 30 and acts to bring the winding tube 5 back to a wound position.
- the electric motor 33 of the actuator 3 has a stator 37 fixed relative to the casing 30, and a rotor 38 driving, via the reduction gear, an output shaft 32, which drives the winding tube 5 by the intermediate of 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 relating, according to the displacement orders received, the electric supply of 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 and therefore of the winding tube 5 at a fixed part of the building. It also allows the recovery of torque at the actuator output. It can be provided with an access hatch (not shown) to the accumulators or batteries contained in the tubular casing 30.
- 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 first end 73 of the compensation spring 7 is therefore connected to a fixed part of the actuator 3, by through the attachment piece 9, while the second end 74 is connected to a rotary part of the actuator 3 or to the winding shaft 5.
- the compensation spring 7, shown diagrammatically in FIGS. 3 and 4 can be constituted in a known manner by one or more elastic elements, such as torsion springs, positioned in series or in parallel, to obtain the desired characteristics in terms elongation and stiffness.
- the compensation spring 7 is fixed to fixing points of the drive system 1: on the one hand by a first end 73 to the attachment piece 9 and on the other hand by a second end 74 to the wheel drive 34 of the winding tube 5, itself integral with the winding tube 5.
- the second end can be fixed to the output shaft 32.
- L7 the length of the compensation spring 7 at rest, taken in the direction of the reference axis X.
- L4 the length between the drive wheel 34 and the attachment piece 9 in the same direction.
- L3 the length of the actuator taken in the same direction.
- the lengths L7 and L4 are less than the length L3 and the compensation spring 7 does not protrude substantially beyond the ends of the actuator 3, which gives the actuator sub-assembly a compact and monolithic character simplifying its handling and saving time in installation.
- the length L7 of the compensation spring 7 at rest as well as the length L4 of the compensation spring 7 installed are defined from the parameters of the installation 200.
- the compensation spring 7 is defined by one or more of the static parameters next :
- static parameters are input parameters, from which other static parameters, or output parameters, are defined.
- the compensation spring 7 is also defined by dynamic parameters, or parameters relating to the torque, among which:
- the modification of the torque applied to the compensation spring 7 modifies its elongation, which has the effect of modifying the diameter of the turns and the spacing between the turns which constitute it, since the spacing between the two ends 73 and 74 of the compensation spring 7 is fixed.
- the compensating spring 7 is constrained (that is to say, it coils on itself), its length increases and when the stress is released, the length of the compensating spring 7 decreases.
- the compensating spring 7 comprises a first series of turns 70, called contiguous turns, having at rest a first spacing E70 and at least a second series of turns 72, called non-contiguous turns, having at rest a second spacing E72 whose value is greater than the value of the first gauge E70.
- the spacings E70 and E72 are taken along the central axis X. By higher, we mean that the spacing E72 is worth at least 105% of the spacing E70 or that the spacing E72 is increased by at least 1 mm from distance E70.
- the compensating spring 7 When installing the compensating spring 7 relative to the drive system 1, the compensating spring 7 is compressed axially, so as to bring the non-contiguous turns 72 closer to each other.
- the length L4 of the installed compensation spring 7 is less than the length L7 of the compensation spring 7 at rest.
- This compression creates axial forces in the direction of the attachment points of the ends 73 and 74 of the compensation spring 7. These axial forces also have the consequence of creating forces on the contiguous turns 70, bringing it closer to one another.
- the bringing together of the contiguous turns 70 stiffens the compensation spring 7, which limits the deflections and the noise generated during the rotations of the winding shaft 5.
- the more rigid the compensation spring 7 is the more it is rigid radially and thereby avoiding uncontrollable deformations of the compensation spring 7 by ripple effect.
- the compensation spring 7 with spaced turns also makes it possible to absorb the extension of the compensation spring 7 under the effect of the torque generated by the actuator 3.
- the second series of turns 72 is located at one end of the compensation spring 7.
- the spacing E70 of the first series of turns 70 is zero, the turns 70 being contiguous. In a variant not shown, the spacing E70 can be non-zero.
- the second series of turns 72 extends over a length L72 of the compensation spring 7 which is determined by a fraction of the total length L of the compensation spring 7.
- the lengths L72 and L are taken along the central axis X
- the number of contiguous turns 70 and the number of non-contiguous turns 72 is determined, for example using a calculation software, depending on the size, the axial preload, the elongation of the spring on the maximum number of turns, the minimum length taken by the turns when they are fully compressed on top of each other and a margin.
- the second series of turns 72 can be located at a distance from the ends of the compensation spring 7.
- the compensation spring 7 may comprise several series of turns 72, the spacing E72 of which is greater than the spacing of the turns 70 of the first series. These series of additional spaced 72 turns can be positioned at different locations along the central axis X.
- All of the contiguous 70 and non-contiguous turns 72 participate in the compensation of the drive system 1, which means that there are no so-called lost turns.
- one or two turns necessary for positioning the ends 73 and 74 of the compensation spring 7 at the attachment points can be provided and are therefore considered as lost turns, in particular because they are constrained in diameter by the piece d 'hook 9 or the drive wheel 34.
- the invention makes it possible to reduce the noise of the drive system 1, to avoid the loss of turns, to better control the deformation of the compensating spring 7.
- This solution also allows a simpler attachment of the compensating spring 7. Indeed , due to the axial stress towards the attachment points of the ends of the compensation spring 7, the two ends 73 and 74 can therefore be simple folded portions of the compensation spring 7, which are housed in housings provided for the attachment piece 9 and the drive wheel 34. These housings have a main direction parallel to the reference axis X.
- the compensation spring 7 with different series of turns does not involve little or no additional manufacturing cost.
- the amount of material is similar to that required for a compensating spring produced according to the principles of the prior art. At most, it is necessary to carry out a suitable cleaning or surface treatment, in particular contiguous turns, so that these can slide relative to each other.
- the compensating spring 7 with different series of turns responds to the constraints of radial size and length of wire in the field of closing, screening or sun protection installations.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
- Control Of Position Or Direction (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1856377A FR3083816B1 (en) | 2018-07-11 | 2018-07-11 | SYSTEM FOR DRIVING A SCREEN AND INSTALLATION INCLUDING SUCH A SYSTEM |
PCT/EP2019/068502 WO2020011836A1 (en) | 2018-07-11 | 2019-07-10 | Drive system driving a screen, and apparatus comprising such a system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3821102A1 true EP3821102A1 (en) | 2021-05-19 |
Family
ID=63579430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19736731.1A Pending EP3821102A1 (en) | 2018-07-11 | 2019-07-10 | Drive system driving a screen, and apparatus comprising such a system |
Country Status (4)
Country | Link |
---|---|
US (1) | US11719041B2 (en) |
EP (1) | EP3821102A1 (en) |
FR (1) | FR3083816B1 (en) |
WO (1) | WO2020011836A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN214330481U (en) * | 2021-03-18 | 2021-10-01 | 宁波森瑞机电技术有限公司 | Intelligent sunshade curtain with replaceable battery |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US322347A (en) * | 1885-07-14 | Spring-roller curtain-fixture | ||
FR830401A (en) * | 1937-03-22 | 1938-07-29 | Coindet Ets | Device for tensioning in an adjustable manner the winding spring of automatic blind frames or rollers |
FR2715966B1 (en) * | 1994-02-04 | 1996-04-05 | Farnier & Penin | Canvas winding mechanism. |
US5975186A (en) * | 1998-03-05 | 1999-11-02 | Day; Perry | Roller blinds mountings |
JP3870829B2 (en) * | 2002-04-18 | 2007-01-24 | 文化シヤッター株式会社 | Shock absorber for shutter |
JP2005054374A (en) * | 2003-08-05 | 2005-03-03 | Bunka Shutter Co Ltd | Opening/closing body moving device |
-
2018
- 2018-07-11 FR FR1856377A patent/FR3083816B1/en active Active
-
2019
- 2019-07-10 EP EP19736731.1A patent/EP3821102A1/en active Pending
- 2019-07-10 US US17/259,068 patent/US11719041B2/en active Active
- 2019-07-10 WO PCT/EP2019/068502 patent/WO2020011836A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
US20210140233A1 (en) | 2021-05-13 |
FR3083816B1 (en) | 2020-10-09 |
FR3083816A1 (en) | 2020-01-17 |
WO2020011836A1 (en) | 2020-01-16 |
US11719041B2 (en) | 2023-08-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2267330B1 (en) | Electric actuator for driving a home automation screen | |
EP2655780B1 (en) | Motorized operating device for operating a movable screen, having a roll-up canvas, of a window covering or projection screen device | |
EP2409943B1 (en) | Telescopic lifting device driven by a rack and pinion | |
EP2893114B1 (en) | Electromechanic actuator for driving a home automation screen | |
EP3717728B1 (en) | Electromechanical actuator and home automation installation comprising such an actuator | |
EP1456499A1 (en) | Motor-driven shutter or sun-shading device | |
EP3830374B1 (en) | Mechanical module for filtering vibrations, electromechanical actuator comprising such a mechanical module for filtering vibrations, and closure, covering or solar protection installation comprising such an electro-mechanical actuator | |
EP3821102A1 (en) | Drive system driving a screen, and apparatus comprising such a system | |
EP3821103B1 (en) | Drive system driving a screen, and apparatus comprising such a system | |
EP3816091A1 (en) | Hammerhead tower crane with automatic folding and unfolding | |
EP3821104B1 (en) | Drive system driving a screen, and apparatus comprising such a system | |
WO2020025578A1 (en) | System for driving a screen and closure or solar protection apparatus comprising such a system | |
EP1637693A1 (en) | Device for driving a roller of a roller shutter | |
FR2823791A1 (en) | WINDING SPRING CURTAIN | |
FR2969689A1 (en) | Motorized device for maneuvering mobile screen roller of window covering or projection screen, has side element and roller compensating torque acting during unfolding of screen by interaction with gravity and/or with fabric of screen | |
FR2655634A1 (en) | Caged cylinder with telescopic hollow rods and use thereof | |
EP3851609A1 (en) | Retractable protection system and pergola comprising such a system. | |
EP2008847B1 (en) | Roll-up blind with means for slowing the winding process and corresponding vehicle | |
WO2020084103A1 (en) | Electromechanical actuator and home automation installation comprising such an actuator | |
FR3053720A1 (en) | STORE WITH ORIENTABLE BLADES | |
FR2980812A1 (en) | Motorized operating device for movable screen of window covering/projection screen device of building, has compensation unit to compensate for unwinding torque and act exclusively by interaction with weight and/or canvas | |
FR2955140A1 (en) | INSTALLATION OF GARAGE DOOR WITH ACTUATOR AND MOBILE TROLLEY | |
EP1262351A1 (en) | Roller blind with two motors |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20210107 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20221013 |