EP2899359B1 - Vorrichtung zum Vorspannen einer Feder eines Rollvorhangs - Google Patents

Vorrichtung zum Vorspannen einer Feder eines Rollvorhangs Download PDF

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Publication number
EP2899359B1
EP2899359B1 EP15152459.2A EP15152459A EP2899359B1 EP 2899359 B1 EP2899359 B1 EP 2899359B1 EP 15152459 A EP15152459 A EP 15152459A EP 2899359 B1 EP2899359 B1 EP 2899359B1
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EP
European Patent Office
Prior art keywords
spring
loading
external support
snap
screen
Prior art date
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Application number
EP15152459.2A
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English (en)
French (fr)
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EP2899359A1 (de
Inventor
Antonio Valentino Schettini
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.)
L'angellotti Angelo
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L'angellotti Angelo
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Publication of EP2899359A1 publication Critical patent/EP2899359A1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—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
    • E06B9/50—Bearings specially adapted therefor
    • 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
    • E06B9/60—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
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/62—Counterweighting arrangements

Definitions

  • the present invention relates to the sector of door and window frames, and in particular to curtains of the rolling type.
  • the present invention regards an innovative pre-loading device that is particularly convenient and safe to install, in so far as it does not require particular equipment or arrangements for mounting and installation.
  • a spring-winding device that envisages a bushing provided with front-engagement teeth (i.e., ones engaging in an axial direction), wherein the element that rigidly connects the winding spring to the lateral support is divided into two parts that can slide axially with respect to one another, one of which has a series of teeth once again of the front-engagement type.
  • the teeth do or do not engage: if the teeth engage, the winding spring has its ends blocked, whereas, if the teeth do not engage, the spring exerts its own force on the tube via the end engaged in the latter.
  • the teeth do not engage when the spring is located in its seat since installation determines sliding of the two parts with front teeth in the sense of releasing the teeth from engagement.
  • the teeth of said two axially slidable parts are rigid and are unable to undergo any elastic deformation.
  • a disadvantage of the above known device is represented by the fact that, in the device described in WO 2009/128108 , there is always necessary a force that keeps the teeth of the two axially sliding components constantly in front engagement in order to enable rotation only in the loading direction.
  • a device for preloading of a rewind mechanism for a fabric arranged on an elongated tube or the like of a roller blind, a projector screen or the like is known, from WO 2012/064270 , a device for preloading of a rewind mechanism for a fabric arranged on an elongated tube or the like of a roller blind, a projector screen or the like.
  • the rewind mechanism is arranged to be essentially inserted into said tube and includes a spring, that is tensioned when the fabric is rolled out and relieved when the fabric is rolled up onto the tube.
  • the device includes an outer mounting element, that is arranged to be attached to the tube, and an inner mounting element, that is arranged to be attached to an outer bracket, said mounting elements being rotatingly arranged in relation to each other about a longitudinal axis of said tube.
  • a spring element is arranged between said mounting elements and includes a sleeve, in which said spring is arranged.
  • the sleeve has an inner diameter that is smaller than the outer diameter of the spring in an untensioned condition, wherein said spring is arranged inside the sleeve by being inserted therein in a pretensioned condition.
  • a roller shade which may include: a roller; an axle located in the roller; an adjustable counterbalancing mechanism configured to counter balance a rotation of the roller wherein the counterbalancing mechanism is configured to impart a rotational force on the roller and the rotational force is adjusted by rotating the axle; and a locking mechanism attached to the roller and configured to lock the axle at a given angular orientation, wherein the locking mechanism includes a shear pin.
  • DE 10 2011 050666 a winding assembly which has an outside retainer provided for a cord or a curtain, where a hollow shaft is coupled to a drive wheel at one end. A pulling force is applied by the cord on the drive wheel to rotate a hollow shaft in a winding direction. A spring motor arranged in the hollow shaft is tensioned during winding of the cord. An unwinding operation is supported by applying a rotational force on the hollow shaft.
  • the device D illustrated in Figure 1 is designed for carrying out pre-loading of the spring that enables winding and unwinding of the screen on the tube in rolling mosquito screens.
  • loading of the spring occurs without any possibility of it unwinding dangerously during installation on account of a wrong manoeuvre on the part of the installer.
  • a peculiar characteristic of the invention lies in the fact that, unlike what occurs for traditional devices, loading of the spring can be carried out prior to installation, i.e., during assembly of the components in the box of the rolling curtain, and not, as usually occurs, directly at the moment of installation when the box is mounted on the door or window frame.
  • the device D comprises a plurality of elements coaxial to one another and sharing the axis of the rolling mosquito screen, namely: an external support 1; an engagement pin 2; a retaining spring 3; an internal bushing 4; a snap-action spring 5; and a spring pin 6. All these elements are described hereinafter.
  • the external support 1 inserted therein is the tube TR on which the mosquito screen is rolled. Assembled coaxially to the support 1 are the components that constitute the device D, and the support itself is moreover provided with a toothed inner area with a substantially saw-tooth profile that is of primary importance for operation thereof.
  • a projection 10 is provided that projects in a radial direction and has a body with longitudinal development, like a spline, having the purpose of constraining in rotation the tube TR of the mosquito screen on the support 1. Accordingly, this tube TR envisages one or more internal longitudinal grooves designed to co-operate with said projection 10.
  • the proximal end of the support 1 has a perimetral shoulder 14 designed to provide a valid resting contrast for the screen tube TR on which the mosquito screen is rolled.
  • the engagement pin 2 has the dual function of connection between the device and the lateral end piece for fixing the mosquito screen to the door or window frame and between the device D and the pre-loading spring through the spring pin 6. It has a distal-end area having a square cross section, located on which is the snap-action spring 5. Provided in the outer part of the proximal end is an area that has, preferably, both a slot with a hexagonal cross section and a protrusion having a square (or hexagonal) shape that enables loading of the spring using appropriate wrenches of an Allen-wrench type or of a fixed-wrench type. Adjacent to the proximal end a shoulder 12 is provided on which the retaining spring 3 comes to bear. In order to prevent any sticking during the relative axial movement between the pin 2 and the support 1, provided on the outside of the retaining spring 3 and adjacent to the shoulder 12 is a tubular sleeve 13 designed to slide freely within the support 1.
  • the retaining spring 3 with axial thrust, keeps the components of the ensemble in the correct working position.
  • the retaining spring 3 Prior to installation, the retaining spring 3 is not compressed or is only slightly compressed and enables engagement for loading in so far as the spring pin 6 bears upon the distal end of the tube support 1 and keeps the snap-action spring 5 in a position such that it can mesh with the internal toothing of the tube support 1.
  • the retaining spring 3 tends (as will be seen more clearly from what follows) to bring the parts back into the position of engagement of the snap-action spring 5 with the toothed part of the tube support 1.
  • the snap-action spring 5 constitutes the true novelty of the device. It is substantially constituted by a bushing with one or more saw-tooth external teeth, designed to undergo elastic deformation in a radial direction. It is made of plastic material containing elastomer that enables it to bend elastically its own teeth in a radial direction to engage by snap action the teeth present inside the tube support 1 and simultaneously to be able to turn and thus load the pre-loading spring MP of the mosquito screen.
  • the pre-loading device D is designed to be mounted in the tube TR with round section, on which the mesh of the mosquito screen is rolled and, more precisely, at the end of said round tube and simultaneously at the end of the pre-loading spring MP that brings about rolling and unrolling of the mosquito screen itself (see Figure 9 ) and that is protected by the spring tube TM.
  • the device is thus assembled with the aid of a single fixing screw 7.

Landscapes

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

Claims (14)

  1. Vorrichtung (D) zum Vorspannen einer Vorspannfeder (MP) eines Rollvorhangs, die zwischen dem Vorhang und einem seitlichen Endstück (11) zum Befestigen des Vorhangs an einer Tragkonstruktion montiert werden kann, wobei die Vorrichtung koaxial an mindestens einem Ende eines Gitterrohrs (TR) montiert werden kann, auf das ein Rollvorhang oder ein Mückengitter aufgerollt wird, wobei sie in Kombination Folgendes umfasst:
    - einen äußeren rohrförmigen Träger (1), auf dem das Gitterrohr (TR) angebracht werden kann, mit einem zahnförmigen Innenbereich mit einem im Wesentlichen sägezahnartigen Profil,
    - einen am Ende der Vorspannfeder (MP) angebrachten Federstift (6),
    - einen Eingriffsstift (2), der die Doppelfunktion der Verbindung zwischen der Vorrichtung (D) und dem seitlichen Endstück (11) zum Befestigen des Mückengitters sowie zwischen der Vorrichtung (D) und der Vorspannfeder (MP) durch den Federstift (6) ausübt, wobei der Eingriffsstift einen distalen Endbereich mit einem quadratischen oder vieleckigen Querschnitt aufweist, auf dem die Schnappfeder (5) positioniert ist,
    - eine Innenbuchse (4), die im Betrieb die Funktion, zwischen der Haltefeder (3) und der Schnappfeder (5) anzuliegen, ebenso wie die Funktion ausübt, längsführend zwischen dem zylindrischen Körper des Eingriffsstifts (2) und dem äußeren Träger (1) anzuliegen, und die das einzige Element ist, das sich während des Auf- und Abwickelns der Vorspannfeder dreht, d. h. während des Schließens und Öffnens des Mückengitters,
    dadurch gekennzeichnet, dass die Vorrichtung Folgendes umfasst:
    - eine Schnappfeder (5), die im Wesentlichen aus einer Buchse mit einem oder mehreren sägezahnartigen äußeren Zähnen besteht, die ausgebildet ist, um eine elastische Verformung in einer radialen Richtung zu erfahren und mit dem zahnförmigen Innenbereich des äußeren Trägers (1) zusammenzuwirken, wobei die Zähne der Schnappfeder (5) elastisch verformbar sind und in einer radialen, und nicht axialen, Richtung bezüglich der Achse des Rollvorhangs abragen,
    wobei diese Elemente koaxial zueinander positioniert sind und eine gemeinsame Achse mit dem Rollvorhang aufweisen.
  2. Vorrichtung (D) nach Anspruch 1, dadurch gekennzeichnet, dass sie ferner eine Haltefeder (3) mit axialem Schub umfasst, welche die Komponenten der Baugruppe in der korrekten Arbeitsstellung hält: vor Montage ist die Haltefeder (3) nicht zusammengedrückt oder ist leicht zusammengedrückt und ermöglicht einen Eingriff zum Vorspannen so weit, bis der Federstift (6) am distalen Ende des äußeren Trägers (1) anliegt, und hält die Schnappfeder (5) in einer derartigen Stellung, dass sie mit der Innenverzahnung des äußeren Trägers (1) kämmen kann, und nach Montage hat die Haltefeder (3) die Tendenz, die Teile der Vorrichtung zurück in den Zustand des Eingriffs der Schnappfeder (5) mit dem zahnförmigen Teil des äußeren Trägers (1) selbst zu bringen.
  3. Vorrichtung (D) nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass auf der Außenfläche des äußeren Trägers (1) ein Vorsprung (10) vorgesehen ist, der in einer radialen Richtung abragt und einen Körper mit einer Längsabwicklung aufweist, wie z. B. eine Steckverzahnung, die den Zweck hat, die Drehung des Gitterrohrs (TR) des Mückengitters auf dem äußeren Träger (1) selbst einzuschränken, wobei das Gitterrohr (TR) entsprechend eine oder mehrere innere Längsnuten aufweist, die ausgebildet sind, um mit dem Vorsprung (10) zusammenzuwirken.
  4. Vorrichtung (D) nach Anspruch 3, dadurch gekennzeichnet, dass das proximale Ende des äußeren Trägers (1) eine Umfangsschulter (14) aufweist, die ausgebildet ist, um ein wirksames Anlageelement für das Gitterrohr (TR) zu bilden, auf welches das Mückengitter aufgerollt wird.
  5. Vorrichtung (D) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass im äußeren Teil des proximalen Endes des Eingriffsstifts (2) ein Bereich vorgesehen ist, der einen Schlitz mit einem sechseckigen Querschnitt und/oder einen Vorsprung mit einer quadratischen oder sechseckigen Form aufweist, wodurch die Feder über geeignete Schlüssel vom Innensechskanttyp oder vom Maulschlüsseltyp vorgespannt werden kann.
  6. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass benachbart zum proximalen Ende des Eingriffsstifts (2) eine Schulter (12) vorgesehen ist, an der die Haltefeder (3) zum Anliegen kommt.
  7. Vorrichtung (D) nach Anspruch 6, dadurch gekennzeichnet, dass zum Verhindern eines Klemmens während der relativen axialen Bewegung zwischen dem Eingriffsstift (2) und dem äußeren Träger (1) außerhalb der Haltefeder (3) und benachbart zur Schulter (12) eine rohrförmige Hülse (13) vorgesehen ist, die ausgebildet ist, um innerhalb des äußeren Trägers (1) selbst frei zu gleiten.
  8. Vorrichtung (D) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schnappfeder (5) aus elastomerhaltigem Kunststoff besteht, der es ermöglicht, ihre eigenen Zähne in einer radialen Richtung elastisch zu biegen, so dass sie durch Schnappwirkung mit den Zähnen innerhalb des äußeren Trägers (1) in Eingriff kommen und gleichzeitig drehen und so die Vorspannfeder (MP) des Rollvorhangs oder des Mückengitters vorspannen können.
  9. Vorrichtung (D) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Zusammenbau des Federstifts (6) mit dem Eingriffsstift (2) über eine koaxiale selbstschneidende Schraube (7) erreicht wird.
  10. Vorrichtung (D) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie in dem Gitterrohr (TR) mit einem runden Querschnitt, auf welches das Mückengitter aufgerollt wird, und gleichzeitig am Ende der Vorspannfeder (MP) angebracht ist, die bewirkt, dass das Mückengitter selbst auf- und abgerollt wird, und die durch ein Federrohr (TM) geschützt ist.
  11. Vorrichtung (D) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zum Vorspannen der Vorspannfeder (MP), wobei das Gitterrohr (TR), auf welches das Gitter aufgerollt wird, stationär gehalten wird, der Eingriffsstift (2) gedreht wird, um so auch die Schnappfeder (5) und den dazu drehfest angebrachten Federstift (6) zum Drehen zu bringen.
  12. Vorrichtung (D) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zähne der Schnappfeder (5) flexibel sind und eine Verformung in einer radialen Richtung erfahren und während der Drehung mit den starren Zähnen innerhalb des äußeren Trägers (1) in Eingriff kommen, um so das Spannen der Vorspannfeder (MP) zu ermöglichen.
  13. Vorrichtung (D) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass, sobald die gewünschte Vorspannung für die Feder (MP) erreicht ist, der quadratische Kopf des Eingriffsstifts (2) sich in dem auf dem seitlichen Endstück (11) vorgesehenen Sitz zum Befestigen des Mückengitters an dem Tür- oder Festerrahmen befindet, so dass der Eingriffsstift (2) bezüglich des äußeren Trägers (1) zur Mitte des Mückengitters axial verschoben wird, und diese Verschiebung einen Schub auf die Schnappfeder (5) bewirkt, die sich zusammen mit dem Federstift (6) verschiebt, bis sie außer Eingriff mit dem zahnförmigen Innenbereich des äußeren Trägers (1) selbst kommt, so dass die Vorrichtung selbst in beiden Drehrichtungen derart frei drehen kann, dass das Mückengitter normal geöffnet und geschlossen werden kann.
  14. Vorrichtung (D) nach den Ansprüchen 2 und 13, dadurch gekennzeichnet, dass die axiale Verschiebung des Eingriffsstifts (2) bezüglich des äußeren Trägers (1) des Gitterrohrs (TR) für das Mückengitter einen Schub auf die Haltefeder (3) bewirkt, die, da sie axial zusammengedrückt wird, eine Gegenkraft auf die Buchse (4) ausübt, die mit ihrem äußeren Umfang an der Innenverzahnung des äußeren Trägers (1) anliegt, wodurch erreicht wird, dass das Zusammendrücken der Haltefeder (3) die Vorrichtung (D) zurück in den Vorspannzustand bringt, sobald sie von dem seitlichen Befestigungsendstück (11) entfernt ist.
EP15152459.2A 2014-01-27 2015-01-26 Vorrichtung zum Vorspannen einer Feder eines Rollvorhangs Active EP2899359B1 (de)

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EP2899359B1 true EP2899359B1 (de) 2017-01-04

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9631425B2 (en) * 2015-09-08 2017-04-25 Crestron Electronics, Inc. Roller shade with a pretensioned spring and method for pretensioning the spring
CN112682449B (zh) * 2019-10-18 2022-12-20 长城汽车股份有限公司 弹性元件安装塞及安装塞组件

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ITTO20080302A1 (it) 2008-04-17 2008-07-17 Gianus S R L Dispositivo di sicurezza per schermi su tubo, in particolare per tende tecniche, zanzariere, reti e schermi avvolgibili, e relativi procedimenti di installazione e disinstallazione di tale dispositivo
SE535383C2 (sv) * 2010-11-10 2012-07-17 Markisol Holding Ab Anordning för förspänning av en upprullningsmekanism
DE102011050666B4 (de) * 2011-05-27 2014-06-12 Achim Lienert Aufwickelvorrichtung
US20140014281A1 (en) * 2012-07-13 2014-01-16 Homerun Holdings Corporation Shade with a Shear Pin and Method for Pretensioning a Shade

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ES2617310T3 (es) 2017-06-16

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