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EP1686231B1 - Device for avoiding damage to hangings - Google Patents

Device for avoiding damage to hangings Download PDF

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Publication number
EP1686231B1
EP1686231B1 EP20050405648 EP05405648A EP1686231B1 EP 1686231 B1 EP1686231 B1 EP 1686231B1 EP 20050405648 EP20050405648 EP 20050405648 EP 05405648 A EP05405648 A EP 05405648A EP 1686231 B1 EP1686231 B1 EP 1686231B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
coupling
winding
winding shaft
coupling means
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.)
Expired - Lifetime
Application number
EP20050405648
Other languages
German (de)
French (fr)
Other versions
EP1686231A1 (en
Inventor
Stefan Lang
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.)
Griesser Holding AG
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Griesser Holding AG
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Filing date
Publication date
Application filed by Griesser Holding AG filed Critical Griesser Holding AG
Publication of EP1686231A1 publication Critical patent/EP1686231A1/en
Application granted granted Critical
Publication of EP1686231B1 publication Critical patent/EP1686231B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives

Definitions

  • the invention relates to a device for preventing damage to hangings according to the preamble of patent claim 1.
  • Hangings such as blinds with non-compressible lateral elevator means such as chains or steel bands, in particular motor-driven shutters or blinds, are exposed to a latent risk of damage from objects or other obstacles which are in the path of the blind or the store. There is also the risk of damage by ice or snow in the lateral guides, which can prevent lowering.
  • DE 3 108 702 A or EP 0 246 338 A Devices are known which should protect the blinds from damage.
  • a widely known device is the end rail, ie, in principle, the lowest blade, in contact with to decouple an obstacle in the guideway from the lateral elevator means. By decoupling the end rail and the function of the anti-surge can be impaired.
  • An object of the present invention is to provide a device for preventing damage to hangings, in which the elevator shaft is decoupled from the elevator wheel when a predetermined resistance is exceeded by the curtain and - after removal of the obstacle - is connected again true to angle.
  • the inventive connection between the elevator shaft and the elevator wheel allows uncoupling of the two elements and later a true-angle re-engagement after removal of the obstacle.
  • the drive motor can continue to rotate until the duration of a regular closing time without the store being damaged.
  • FIG. 1 only the essential elements of the invention of a slat blind 1 are shown.
  • An elevator shaft 3 is driven by a motor M not shown directly or by an unillustrated transmission by hand.
  • the elevator means 7 in turn are protected and guided on all sides within guide rails 9 with a C-shaped cross-section.
  • a plurality of fins 11 are used, the ends of which are pivotally guided via pivot pins 13 in the guide rails 9.
  • connection between the lowermost fin 11 and the elevator means 7 is not part of this invention; It is well known in the prior art and in many variants.
  • a turning device 15 can furthermore be arranged on the winding shaft 3, by means of which the blade angle can be adjusted.
  • the turning device 15 is also not part of the invention and will therefore not be explained in detail. It is well known in the prior art in many designs. Instead of pivotable slats 11 and rods can be connected to the elevator means 7 and form a shutter.
  • FIG. 2 is enlarged, the elevator wheel 5 visible for a chain, which is mounted on a coupling device, short coupling 17 and connected to this rotation, visible.
  • the elevator shaft 3 is shown, which penetrates the coupling 17 axially in a suitably formed bore.
  • the coupling 17 comprises a sleeve 19 in the form of a Hollow cylinder, which has a collar or paragraph 21 at one end.
  • the helical gear 23, on the one hand, has a polygonal bore corresponding to the cross-section of the elevator shaft 3 and is co-rotated by it in a form-fitting manner.
  • the at least one screw thread 25 or the at least one end face 27 of the helical gear 23 bears against a correspondingly formed step 29 in the collar 21. In a multi-speed screw 25 more levels 29 are provided in the collar 21 accordingly.
  • the sleeve 19 is rotated by the helical gear 23 which is non-rotatably mounted on the winding shaft 3.
  • the entrainment takes place on the one hand due to static friction of the screw threads 25 on the collar 21 and on the other hand or mainly due to the hanging on the elevator means 7 slats 11, which exert a moment on the winding wheel 5.
  • a rib 30 may be formed, which engages in a corresponding groove 32 at the end of the screw 25.
  • a helical spring-like trained element 31 wraps around the winding shaft 3, without being in contact with it.
  • Cams 33 mounted on the periphery of the element 31, which engage in an axially extending groove 34 in the bore of the sleeve 19, prevent co-rotation of the element 31 when the at least one screw thread 25 screws into the element 31.
  • the screwing between the connections of the element 31 continues as long as the obstacle exerts a moment on the helical gear 23. During this time, the helical gear 23 screws through the turns of the element 31 to the right.
  • the individual turns of the element 31 may, in contrast to the turns of a coil spring, the end face abut each other and are only temporarily by the helical gear 23, in the example according to the characters 3 and 4
  • the number of turns of the element 31 is ideally so large that it corresponds to the maximum number of shaft revolutions of the elevator shaft 3, which corresponds to the maximum number of shaft revolutions of the elevator shaft 3, which for the opening or closing of the store are necessary.
  • the element 31 is formed as a helically wound sheet metal strip whose narrow edges form the shell and the bore of a hollow cylinder.
  • the traveling nut 35 is the front side of the collar 21 and the step 29 of the sleeve 19 and rotates when the elevator shaft 3 is rotated. If the curtain meets 1 obstacle, the traveling nut 35 begins to rotate in the sleeve 19 and the traveling nut 35 moves (in FIG. 8 ) left to right. In this case, despite the rotational movement of the elevator shaft 3, the sleeve 19 with the elevator wheel 5 mounted thereon remains standing as long as the obstacle is present.
  • the traveling nut 35 After cancellation of the force acting on the curtain 1 by the obstacle and reversal of the direction of rotation of the elevator shaft 3, the traveling nut 35 initially screwed in the internal thread 39 from the right to the starting position on the left side and thereby couples the elevator 5 to the elevator shaft 3, if the End of the screw 37 abuts the step 29.
  • the coupling 17 has, in particular if it is used in an element 31 according to the first embodiment, an extremely low axial height and can consequently be used on each curtain 1, in the slats 11 or in a shutter, the rods of a chain 7 vertically become.

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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)
  • Blinds (AREA)

Description

Gegenstand der Erfindung ist eine Vorrichtung zur Verhinderung von Schäden an Behängen gemäss Oberbegriff des Patentanspruchs 1.The invention relates to a device for preventing damage to hangings according to the preamble of patent claim 1.

Behänge wie Storen mit nicht stauchbaren seitlichen Aufzugsmitteln wie Ketten oder Stahlbänder, insbesondere motorisch angetriebene Rolladen oder Storen, sind einer latenten Gefahr einer Beschädigung durch Gegenstände oder anderer Hindernisse, welche im Fahrweg des Rolladens oder des Stores liegen, ausgesetzt. Auch besteht die Gefahr einer Beschädigung durch Eis oder Schnee in den seitlichen Führungen, welche das Absenken verhindern können. Aus dem Stand der Technik z.B. DE 3 108 702 A oder EP 0 246 338 A sind Vorrichtungen bekannt, welche die Storen vor Schäden bewahren sollen. Eine weitherum bekannte Vorrichtung besteht darin, die Endschiene, d.h. im Prinzip die unterste Lamelle, bei einem Kontakt mit einem im Fahrweg befindlichen Hindernis von den seitlichen Aufzugsmitteln zu entkuppeln. Durch das Entkuppeln der Endschiene kann auch die Funktion der Hochstosssicherung beeinträchtigt werden.Hangings such as blinds with non-compressible lateral elevator means such as chains or steel bands, in particular motor-driven shutters or blinds, are exposed to a latent risk of damage from objects or other obstacles which are in the path of the blind or the store. There is also the risk of damage by ice or snow in the lateral guides, which can prevent lowering. From the prior art, for example DE 3 108 702 A or EP 0 246 338 A Devices are known which should protect the blinds from damage. A widely known device is the end rail, ie, in principle, the lowest blade, in contact with to decouple an obstacle in the guideway from the lateral elevator means. By decoupling the end rail and the function of the anti-surge can be impaired.

Eine Aufgabe der vorliegenden Erfindung ist die Schaffung einer Vorrichtung zur Verhinderung von Schäden an Behängen, bei welcher die Aufzugswelle bei Überschreiten eines vorgegebenen Widerstands durch den Behang vom Aufzugsrad entkuppelt wird und - nach Beseitigung des Hindernisses - wieder winkelgetreu verbunden wird.An object of the present invention is to provide a device for preventing damage to hangings, in which the elevator shaft is decoupled from the elevator wheel when a predetermined resistance is exceeded by the curtain and - after removal of the obstacle - is connected again true to angle.

Gelöst wird diese Aufgabe durch eine Vorrichtung mit den Merkmalen des Patentanspruchs 1. Besonders vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen umschrieben.This object is achieved by a device having the features of claim 1. Particularly advantageous embodiments of the invention are described in the dependent claims.

Die erfindungsgemässe Verbindung zwischen Aufzugswelle und Aufzugsrad ermöglicht ein Entkuppeln der beiden Elemente und später ein winkelgetreues Wiedereinkuppeln nach Beseitigung des Hindernisses. Je nach Ausbildung des Kupplungselements kann der Antriebsmotor, ohne dass der Store Schaden nimmt, bis zur Dauer einer regulären Schliessdauer weiter drehen.The inventive connection between the elevator shaft and the elevator wheel allows uncoupling of the two elements and later a true-angle re-engagement after removal of the obstacle. Depending on the design of the coupling element, the drive motor can continue to rotate until the duration of a regular closing time without the store being damaged.

Anhand zweier illustrierter Ausführungsbeispiele wird die Erfindung näher erläutert. Es zeigen

Figur 1
eine schematische Darstellung des Aufzugbereichs eines Lamellenstores mit seitlichen Aufzugsmitteln,
Figur 2
eine vergrösserte Darstellung des Ausschnittes A in Figur 1,
Figur 3
eine Explosionsdarstellung der Kupplung gemäss Figur 2,
Figur 4
einen Axialschnitt längs Linie IV-IV in Figur 5,
Figur 5
eine axiale Aufsicht auf die Kupplung,
Figur 6
eine vergrösserte Darstellung des Ausschnittes A in einer weiteren Ausgestaltung der Erfindung,
Figur 7
eine Explosionsdarstellung der Kupplung gemäss Figur 6,
Figur 8
einen Axialschnitt längs Linie VIII-VIII in Figur 9,
Figur 9
eine axiale Aufsicht auf die Kupplung und
Figur 10
eine weitere perspektivische Darstellung der Kupplung.
Based on two illustrated embodiments, the invention will be explained in more detail. Show it
FIG. 1
a schematic representation of the elevator area of a slat blind with lateral elevator means,
FIG. 2
an enlarged view of the detail A in FIG. 1 .
FIG. 3
an exploded view of the clutch according to FIG. 2 .
FIG. 4
an axial section along line IV-IV in FIG. 5 .
FIG. 5
an axial view of the coupling,
FIG. 6
an enlarged view of the detail A in a further embodiment of the invention,
FIG. 7
an exploded view of the clutch according to FIG. 6 .
FIG. 8
an axial section along line VIII-VIII in FIG. 9 .
FIG. 9
an axial view of the coupling and
FIG. 10
another perspective view of the coupling.

In Figur 1 sind nur die für die Erfindung wesentlichen Elemente eines Lamellenstores 1 dargestellt. Eine Aufzugswelle 3 wird von einem nicht näher dargestellten Motor M direkt oder über ein nicht dargestelltes Getriebe von Hand angetrieben. Auf der Aufzugswelle 3, welche vorzugsweise einen Querschnitt eines Polygons aufweist, sitzen zwei Aufzugsräder 5, über welche ein nicht stauchbares Aufzugsmittel 7, z.B. eine Kette oder ein Stahlband, geführt ist. Die Aufzugsmittel 7 ihrerseits liegen geschützt und allseitig geführt innerhalb von Führungsschienen 9 mit C-förmigem Querschnitt. Zwischen den Führungsschienen 9 sind eine Mehrzahl von Lamellen 11 eingesetzt, deren Enden über Schwenkstifte 13 in den Führungsschienen 9 schwenkbar geführt sind. Die Verbindung zwischen der untersten Lamelle 11 und den Aufzugsmitteln 7 ist nicht Teil dieser Erfindung; sie ist aus dem Stand der Technik hinlänglich und in vielen Varianten bekannt. Nebst den beiden Aufzugsrädern 5 kann auf der Aufzugswelle 3 weiterhin noch eine Wendevorrichtung 15 angeordnet sein, mittels welcher die Lamellenwinkel einstellbar sind. Die Wendevorrichtung 15 ist ebenfalls nicht Teil der Erfindung und wird daher nicht näher erläutert. Sie ist hinlänglich aus dem Stand der Technik in vielen Ausführungen bekannt. Anstelle von schwenkbaren Lamellen 11 können auch Stäbe mit den Aufzugsmitteln 7 verbunden sein und einen Rolladen bilden.In FIG. 1 only the essential elements of the invention of a slat blind 1 are shown. An elevator shaft 3 is driven by a motor M not shown directly or by an unillustrated transmission by hand. On the elevator shaft 3, which preferably has a cross section of a polygon, sit two elevator wheels 5, over which a not compressible elevator means 7, for example a chain or a steel strip, is guided. The elevator means 7 in turn are protected and guided on all sides within guide rails 9 with a C-shaped cross-section. Between the guide rails 9, a plurality of fins 11 are used, the ends of which are pivotally guided via pivot pins 13 in the guide rails 9. The connection between the lowermost fin 11 and the elevator means 7 is not part of this invention; It is well known in the prior art and in many variants. In addition to the two winding wheels 5, a turning device 15 can furthermore be arranged on the winding shaft 3, by means of which the blade angle can be adjusted. The turning device 15 is also not part of the invention and will therefore not be explained in detail. It is well known in the prior art in many designs. Instead of pivotable slats 11 and rods can be connected to the elevator means 7 and form a shutter.

In Figur 2 ist vergrössert das Aufzugsrad 5 für eine Kette sichtbar, welches auf einer Kupplungsvorrichtung, kurz Kupplung 17 aufgesetzt und mit dieser drehfest verbunden ist, sichtbar. Weiter ist die Aufzugswelle 3 dargestellt, welche die Kupplung 17 in einer geeignet ausgebildeten Bohrung axial durchdringt.In FIG. 2 is enlarged, the elevator wheel 5 visible for a chain, which is mounted on a coupling device, short coupling 17 and connected to this rotation, visible. Next, the elevator shaft 3 is shown, which penetrates the coupling 17 axially in a suitably formed bore.

Die Kupplung 17 umfasst eine Hülse 19 in Gestalt eines Hohlzylinders, welcher an einem Ende einen Bund oder Absatz 21 aufweist. Die Verbindung (Übertrieb) zwischen der Aufzugswelle 3 und dem Aufzugsrad 5, welches fest mit der Hülse 19 verbunden ist, erfolgt durch ein Schraubenrad 23, d.h. einen ringförmiger Körper, auf dessen Peripherie mindestens ein Schraubengang 25 angeordnet ist. Das Schraubenrad 23 weist einerseits eine dem Querschnitt der Aufzugswelle 3 entsprechende polygone Bohrung auf und wird von dieser formschlüssig mitgedreht. Der mindestens eine Schraubengang 25 bzw. das mindestens eine stirnseitige Ende 27 des Schraubenrades 23 liegt an einer entsprechend ausgebildeten Stufe 29 im Bund 21 an. Bei einem mehrgängigen Schraubengang 25 sind entsprechend mehr Stufen 29 im Bund 21 vorgesehen.The coupling 17 comprises a sleeve 19 in the form of a Hollow cylinder, which has a collar or paragraph 21 at one end. The connection (overdrive) between the winding shaft 3 and the winding wheel 5, which is fixedly connected to the sleeve 19, by a helical gear 23, ie an annular body, on the periphery of which at least one screw 25 is arranged. The helical gear 23, on the one hand, has a polygonal bore corresponding to the cross-section of the elevator shaft 3 and is co-rotated by it in a form-fitting manner. The at least one screw thread 25 or the at least one end face 27 of the helical gear 23 bears against a correspondingly formed step 29 in the collar 21. In a multi-speed screw 25 more levels 29 are provided in the collar 21 accordingly.

Wird nun die Aufzugswelle 3 in Drehrichtung X (vergleiche Figur 3) gedreht, so wird die Hülse 19 vom Schraubenrad 23, welches drehfest auf der Aufzugswelle 3 sitzt, mitgedreht. Die Mitnahme erfolgt einerseits infolge Haftreibung der Schraubengänge 25 am Bund 21 und andererseits bzw. vorwiegend infolge der an den Aufzugsmitteln 7 hängenden Lamellen 11, welche auf das Aufzugsrad 5 ein Moment ausüben.Will now the elevator shaft 3 in the direction of rotation X (see FIG. 3 ), the sleeve 19 is rotated by the helical gear 23 which is non-rotatably mounted on the winding shaft 3. The entrainment takes place on the one hand due to static friction of the screw threads 25 on the collar 21 and on the other hand or mainly due to the hanging on the elevator means 7 slats 11, which exert a moment on the winding wheel 5.

In einer bevorzugten Ausgestaltung der Erfindung kann im Bereich der rampenförmigen Stufe 29 am Bund 21 zusätzlich eine Rippe 30 ausgebildet sein, welche in eine entsprechende Rille 32 am Ende des Schraubengangs 25 einrastet.In a preferred embodiment of the invention, in the region of the ramp-shaped step 29 on the collar 21 additionally a rib 30 may be formed, which engages in a corresponding groove 32 at the end of the screw 25.

Trifft nun der Behang 1 auf ein Hindernis, beispielsweise eine Topfpflanze, die auf einem Fenstersims steht, oder auf eine Vereisung in einer oder beiden Führungsschienen 9, so wirkt eine Kraft F in Drehrichtung Y auf das Aufzugsrad 5 und die Verbindung zwischen dem Schraubenrad 23 und der Hülse 19 wird aufgehoben. Das Schraubenrad 23 bzw. sein Ende 25 löst sich von der Stufe 29 und bewegt sich axial nach rechts. Die Aufzugswelle 3 ist somit vom Aufzugsrad 5 bzw. dem Behang 1 entkoppelt.Now hits the curtain 1 on an obstacle, such as a potted plant that stands on a window sill, or icing in one or both guide rails 9, a force F acts in the direction of rotation Y on the elevator 5 and the connection between the helical gear 23 and the sleeve 19 is released. The helical gear 23 or its end 25 releases from the step 29 and moves axially to the right. The elevator shaft 3 is thus decoupled from the elevator wheel 5 or the curtain 1.

Damit zu einem späteren Zeitpunkt das Einkuppeln exakt an der gleichen Stelle erfolgen kann, umschlingt ein schraubenfederartig ausgebildetes Element 31 die Aufzugswelle 3, ohne mit dieser in Kontakt zu stehen. An der Peripherie des Elementes 31 angebrachte Nocken 33, welche in eine axial verlaufende Nut 34 in der Bohrung der Hülse 19 eingreifen, verhindern ein Mitdrehen des Elements 31, wenn der mindestens eine Schraubengang 25 sich in das Element 31 einschraubt. Das Einschrauben zwischen den Verbindungen des Elements 31 setzt sich fort, solange das Hindernis ein Moment auf das Schraubenrad 23 ausübt. Während dieser Zeit schraubt sich das Schraubenrad 23 durch die Windungen des Elements 31 nach rechts.So that at a later time the engagement can take place exactly at the same place, a helical spring-like trained element 31 wraps around the winding shaft 3, without being in contact with it. Cams 33 mounted on the periphery of the element 31, which engage in an axially extending groove 34 in the bore of the sleeve 19, prevent co-rotation of the element 31 when the at least one screw thread 25 screws into the element 31. The screwing between the connections of the element 31 continues as long as the obstacle exerts a moment on the helical gear 23. During this time, the helical gear 23 screws through the turns of the element 31 to the right.

Die einzelnen Windungen des Elements 31 können, im Gegensatz zu den Windungen einer Schraubenfeder, stirnseitig aneinander anliegen und werden nur temporär durch das Schraubenrad 23, im Beispiel gemäss den Figuren 3 und 4, von rechts nach links verlegt bzw. das Schraubenrad 23 schraubt sich von links nach rechts durch die Windungen des Elements 31. Die Anzahl der Windungen des Elements 31 ist idealerweise so gross, dass sie der maximalen Anzahl der Wellenumdrehungen der Aufzugswelle 3 entspricht, welche für das Öffnen bzw. Schliessen der Store notwendig sind. Nach Beseitigung des Hindernisses kann jederzeit durch Umkehr der Drehrichtung des Antriebsmotors M das Schraubenrad 23 zurück in die Ausgangslage geführt (geschraubt) werden und es wird exakt an derjenigen Winkelstellung einkuppeln, an der das Auskuppeln zuvor erfolgt ist.The individual turns of the element 31 may, in contrast to the turns of a coil spring, the end face abut each other and are only temporarily by the helical gear 23, in the example according to the characters 3 and 4 The number of turns of the element 31 is ideally so large that it corresponds to the maximum number of shaft revolutions of the elevator shaft 3, which corresponds to the maximum number of shaft revolutions of the elevator shaft 3, which for the opening or closing of the store are necessary. After removal of the obstacle can at any time by reversing the direction of rotation of the drive motor M, the helical gear 23 is guided back to the starting position (screwed) and it will engage exactly at that angular position at which the disengagement is done previously.

Vorzugsweise ist das Element 31 als schraubenlinienförmig aufgewundener Blechstreifen ausgebildet, dessen Schmalkanten den Mantel und die Bohrung eines Hohlzylinders bilden.Preferably, the element 31 is formed as a helically wound sheet metal strip whose narrow edges form the shell and the bore of a hollow cylinder.

Im zweiten Ausführungsbeispiel der Erfindung gemäss den Figuren 6 bis 9 tritt an die Stelle des schraubenförmigen Elements 31 aus Flachstahl oder Kunststoff und eines nicht mit der Hülse 19 in direktem Kontakt stehenden Schraubenrades 23 eine auf der Aufzugswelle 3 drehfest gehaltene, jedoch axial verschiebbare Wandermutter 35. Diese umfasst wiederum einen ringförmigen Körper mit einer polygonalen Bohrung, durch welche die Aufzugswelle 3 geführt ist. An der Peripherie der Mutter 35, d.h. von deren ringförmigen Körper, ist mindestens ein Schraubengang 37 ausgebildet (Figur 10), welcher im Eingriff mit einem Innengewinde 39 in der Hülse 19 steht. Die Wandermutter 35 liegt stirnseitig am Bund 21 und an der Stufe 29 der Hülse 19 an und dreht mit, wenn die Aufzugswelle 3 in Drehung versetzt wird. Trifft der Behang 1 auf ein Hindernis, so beginnt die Wandermutter 35 in der Hülse 19 zu drehen und die Wandermutter 35 bewegt sich (in Figur 8) von links nach rechts. Dabei bleibt trotz Drehbewegung der Aufzugswelle 3 die Hülse 19 mit dem darauf befestigten Aufzugsrad 5 stehen, solange das Hindernis vorhanden ist. Nach Aufhebung der durch das Hindernis auf den Behang 1 wirkenden Kraft und Umkehr der Drehrichtung der Aufzugswelle 3 schraubt sich vorerst die Wandermutter 35 im Innengewinde 39 von rechts in die Ausgangsstellung auf der linken Seite und kuppelt dadurch das Aufzugsrad 5 an die Aufzugswelle 3, wenn das Ende des Schraubenganges 37 an der Stufe 29 anstösst.In the second embodiment of the invention according to the FIGS. 6 to 9 occurs in the place of the helical element 31 made of flat steel or plastic and a non-standing with the sleeve 19 in direct contact worm wheel 23 a rotatably held on the winding shaft 3, but axially displaceable wall nut 35. This in turn comprises an annular body with a polygonal hole, through which the elevator shaft 3 is guided. At the periphery of the nut 35, ie of its annular body, is at least one Screw passage 37 is formed ( FIG. 10 ), which is in engagement with an internal thread 39 in the sleeve 19. The traveling nut 35 is the front side of the collar 21 and the step 29 of the sleeve 19 and rotates when the elevator shaft 3 is rotated. If the curtain meets 1 obstacle, the traveling nut 35 begins to rotate in the sleeve 19 and the traveling nut 35 moves (in FIG. 8 ) left to right. In this case, despite the rotational movement of the elevator shaft 3, the sleeve 19 with the elevator wheel 5 mounted thereon remains standing as long as the obstacle is present. After cancellation of the force acting on the curtain 1 by the obstacle and reversal of the direction of rotation of the elevator shaft 3, the traveling nut 35 initially screwed in the internal thread 39 from the right to the starting position on the left side and thereby couples the elevator 5 to the elevator shaft 3, if the End of the screw 37 abuts the step 29.

Die Kupplung 17 weist, insbesondere wenn darin ein Element 31 gemäss dem ersten Ausführungsbeispiel eingesetzt ist, eine äusserst niedrige axiale Bauhöhe auf und kann folglich an jedem Behang 1 eingesetzt werden, bei dem Lamellen 11 oder bei einem Rolladen die Stäbe von einer Kette 7 vertikal geführt werden.The coupling 17 has, in particular if it is used in an element 31 according to the first embodiment, an extremely low axial height and can consequently be used on each curtain 1, in the slats 11 or in a shutter, the rods of a chain 7 vertically become.

Claims (6)

  1. Device for preventing damage to blinds or shutters having incompressible winding means at the side, comprising a winding shaft (3) which is actively connected to a manually operated or motorised drive element (M), and comprising a coupling (17) intended to break the connection between the drive element (M) and the end rail of the blind, characterised in that the coupling (17) comprises a sleeve (19) which encloses the winding shaft (3) and which is connected to a winding wheel (5) for the blind or shutter (1) so as to rotate therewith, and into which sleeve (19) there is inserted an axially displaceable coupling means (23, 35) which is connected to the winding shaft (3) so as to rotate therewith, which coupling means (23, 35), as the blind or shutter is lowered and raised, establishes an active connection between the winding shaft (3) and the winding wheel (5) and which, in the event of a force (F) acting counter to the rotary movement of the winding wheel (5), releases the active connection and axially displaces the coupling means (23, 35) through a helical element (31, 39) on the winding shaft (3).
  2. Device according to claim 1, characterised in that the coupling means (35) comprises on the periphery a screw thread (25) which meshes with an internal thread (39) formed in the sleeve (19).
  3. Device according to claim 1, characterised in that the coupling means (23) comprises at least one screw thread (25) which is formed on the periphery and which engages between the turns of a helical element (31).
  4. Device according to claim 3, characterised in that the element (31) is held in the sleeve (19) so as to rotate therewith and is axially displaceable in the latter.
  5. Device according to claim 3 or 4, characterised in that the element (31) comprises a helically wound sheet metal strip, the narrow edges of which form the bore and the outer surface of a hollow cylinder.
  6. Device according to any one of claims 1 to 5, characterised in that a step (29) which serves as a stop is formed on a collar (21) on the sleeve (19), against which step the end of a screw thread (25, 37) arranged at the end of the coupling element (23, 35) bears during normal operation.
EP20050405648 2005-01-14 2005-11-18 Device for avoiding damage to hangings Expired - Lifetime EP1686231B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH522005 2005-01-14

Publications (2)

Publication Number Publication Date
EP1686231A1 EP1686231A1 (en) 2006-08-02
EP1686231B1 true EP1686231B1 (en) 2012-07-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050405648 Expired - Lifetime EP1686231B1 (en) 2005-01-14 2005-11-18 Device for avoiding damage to hangings

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EP (1) EP1686231B1 (en)
ES (1) ES2393960T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085564A3 (en) 2008-01-30 2013-05-15 Gerhard Geiger GmbH & Co. Drive device with a friction clutch or brake
EP2549051B1 (en) * 2011-07-18 2014-11-26 Tsung-Yuan Hsu Blind Control Device of Venetian Blinds

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1131005B (en) * 1980-03-20 1986-06-18 Imbac Spa AUTOMATIC RELEASE DEVICE FOR END OF DOWN STROKE, COUPLED WITH MANEUVERING WINCHES FOR ROLLER SHUTTERS
CH649603A5 (en) * 1982-05-03 1985-05-31 Regazzi Efrem Fa SHUTTER.
EP0246338A1 (en) * 1986-05-17 1987-11-25 Carlo Maurizio Pozzi Limit stop device for the opening of sun curtains
FR2697577B1 (en) * 1992-11-03 1995-01-13 Simu Automatic declutching mechanism for actuating blinds and other roller shutters.

Also Published As

Publication number Publication date
EP1686231A1 (en) 2006-08-02
ES2393960T3 (en) 2013-01-03

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