EP2334889B1 - Stossabsorbierende haltevorrichtung für rollläden oder rollos - Google Patents

Stossabsorbierende haltevorrichtung für rollläden oder rollos Download PDF

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Publication number
EP2334889B1
EP2334889B1 EP09760626.3A EP09760626A EP2334889B1 EP 2334889 B1 EP2334889 B1 EP 2334889B1 EP 09760626 A EP09760626 A EP 09760626A EP 2334889 B1 EP2334889 B1 EP 2334889B1
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EP
European Patent Office
Prior art keywords
ring
rotor
box
shutter
loop
Prior art date
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Active
Application number
EP09760626.3A
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English (en)
French (fr)
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EP2334889A2 (de
Inventor
Dante Postacchini
Roberto Postacchini
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Individual
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Publication of EP2334889A2 publication Critical patent/EP2334889A2/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/84—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against dropping
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/003—Anti-dropping devices
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/106—Application of doors, windows, wings or fittings thereof for buildings or parts thereof for garages

Definitions

  • the present patent application for industrial invention relates to a shock-absorbing stopping device for rolling shutters or blinds, which is automatically actuated in case of accidental descent of the shutter, dissipating the kinetic energy accumulated by the rolling shutter by deformation of elastic elements.
  • This device falls into the category of the so-called “cushioned parachutes”, the operation of which is fundamentally based on a self-blocking system that provides a short braking stroke before the shutter comes to a halt following to free descent, during which part of the kinetic energy accumulated by the winding shaft of the shutter as result of its uncontrolled descent is normally dissipated by friction.
  • This braking action which precedes the definitive blocking of the shaft, and consequently of the shutter, reduces the violence of the impact on stopping, thereby preventing the whole structure from being subjected to highly dangerous mechanical stress levels.
  • German patent No. DE 3140792 discloses a "cushioned parachute", which comprises a special toothed wheel, which is keyed on the winding shaft of the shutter and enclosed within an opposite pair of circular side covers, tightened one against the other by an annular series of bolts, which also cross a rotary ring that is positioned between the covers and exactly encloses said toothed wheel.
  • This ring is housed, with the possibility of rotating freely, in a hole made on a fixed supporting plate, which is slightly thicker than said ring, so that the border of the side covers adheres to the two opposite sides of said fixed plate and not on the sides of the ring contained in it.
  • Cylindrical rollers are positioned inside the spaces that separate the teeth of the aforesaid toothed wheel, and, in case of accidental descent of the shutter, they are expelled by centrifugal force from their housing and remain embedded within a space provided along the internal circumference of the aforesaid ring, which is driven into rotation by the toothed wheel by means of the cylindrical rollers embedded therein.
  • the ring in its turn, drives into rotation the pair of aforesaid side covers, due to the fact that the tightening bolts of the covers cross the ring.
  • the rotation of the covers immediately determines a braking action against said ring, due to the fact that the border of said covers comes into contact with the sides of the fixed support plate, thereby dissipating energy through friction.
  • EP 0 671 543 discloses a cushioned locking device for rolling shutters or blind according to the preamble of claim 1.
  • the aim of the present invention is to simplify the structural configuration of "cushioned parachutes" of known type, and to reduce their construction costs.
  • Another specific aim of the invention is to introduce new means to dissipate the kinetic energy during the braking phase, in replacement of the ordinary dissipation means by friction, which have traditionally characterised all models of "cushioned parachutes" of known type.
  • the stopping device for rolling shutters or blinds comprises a rotor that is keyed on the winding shaft of the shutter and free to rotate, during the ordinary operation of the shutter, inside a ring, said rotor and said ring being enclosed in a protection and support box.
  • Means of known type are positioned between said rotor and ring to engage the two components, when said rotor achieves excessive angular speed during the descent of the shutter, which can be attributed to failure, such as for example the free uncontrolled descent of the shutter.
  • said ring is normally stopped and maintains its idle position until the descending travel of the shutter does not exceed a predefined speed value, beyond which said ring starts rotating due to the effect of the driving action exerted by said rotor by means of said engagement means.
  • the primary characteristic of said ring is the presence of at least one facet engaged against a corresponding element adapted to be elastically deformed when said facet abandons its idle position, condition that only occurs when the ring is driven into rotation by the rotor.
  • the ring is provided with a pair of facets engaged against two elements, in order to have a symmetric distribution of the stress loads that intervene in case of cushioned braking of the descending travel of the shutter.
  • the catch In order to additionally cushion the last part of the braking travel of the shutter, the catch is given a profile that interferes with the border of its sliding and guiding seat, in such a way that, for a final section, sliding occurs with rubbing between contact surfaces, additionally dissipating energy by friction.
  • the device (A) of the invention comprises a rotor (1) adapted to be keyed on the winding shaft of the shutter and free to rotate, during the ordinary operation of the shutter, inside a ring (2), said rotor (1) and said ring (2) being enclosed inside a protection and support box (3) provided with cover (3a) fitted to the box (3) with screws.
  • Said rotor (1) can be imagined as a sort of toothed wheel, the teeth of which are separated by U-shaped spaces (1 a) that exactly house the cylindrical rollers (4).
  • Each space (1 a) is provided with a curved notch (1 b) on the back side, if considered with reference to the clockwise rotation direction of the rotor (1), which corresponds to the descent of the shutter, as shown in the attached figures.
  • This notch (1b) is shaped as a quarter of circumference with same diameter as the cylindrical rollers (4), thereby receiving them in cradle-like configuration during the transitory phase in which said rollers (4) are expelled from the space (1 a) where they are normally housed.
  • expulsion is caused by a fixed cam (20) that interferes with each roller (4) when it crosses the Top Dead Centre (TDC) of its circular travel.
  • TDC Top Dead Centre
  • the rotor (1) is exactly housed with possibility of rotating inside the ring (2), which is provided on the internal border with a loop (2a) extending for an arch of circumference situated astride the Top Dead Centre (TDC) of the circular travel covered by each of said rollers (4) as long as the rotor (1) rotates jointly with the winding shaft of the shutter.
  • TDC Top Dead Centre
  • the loop (2a) has a gradually increasing depth, which is nevertheless constant for half of its length, and equal to the radius of the cylindrical rollers (4).
  • Each roller (4) slides inside the loop (2a) that receives it as soon as the cam (20) expels it from its housing (1 a); however, due to the fact that the maximum depth of the loop (2a) is equal to the radius of each roller (4), half of the roller is contained in said loop (2a) and the other half is contained in the notch (1 b).
  • the loop (2a) is softly joined at one end with the internal border of the ring (2), whereas it finishes at the other end with a rounded step (2b) situated downstream said Top Dead Centre according to the direction of rotation of the rotor (1) during the descent of the shutter.
  • said rounded step (2b) is situated at the end of the section of the loop (2a) with constant depth equal to the radius of the rollers (4).
  • each rollers (5) determines the temporary partial expulsion from the space (1a) of each roller (4), which passes over the cam (20) and falls again in its space (1 a).
  • the ring (2) is housed in the box (3) in such a way to rotate freely around an axis passing through the centre of the rotor (1).
  • the ring (2) is provided with a diametrically opposite pair of facets (5) engaged against corresponding elastically deformable elements (6).
  • said elastically deformable elements consist in two leaf springs (6), the ends of which are attached inside suitable niches (3c) of the box (3).
  • the idle position of the ring (2) is maintained as long as no roller (4) is embedded between said notch (1 b) and step (2b), as shown in Fig. 1 .
  • the kinetic energy accumulated by the shutter during its uncontrolled descent is immediately and automatically dissipated by the device of the invention (A) to elastically deform the leaf springs (6), as shown in Figs. 2 and 3 , thereby progressively decelerating the descent of the shutter, which is definitely stopped when a suitable catch (8) provided on the external border of the ring (2) stops against a tooth (9) obtained on the cover (3a) of the box (3).
  • the catch (8) is given a suitable profile to interfere with the border (10) of its sliding and guiding seat (11), in such a way that, for a final part, sliding occurs with rubbing between contact surfaces, additionally dissipating energy by friction.
  • a gasket (G) is provided between cover (3a) and box (3) to ensure perfect watertightness of the device.
  • the ring is provided with a hard metal insert (200) with the step (2b), in which a roller (4) is embedded during the uncontrolled descent of the shutter.
  • a gasket (G2) is mounted and housed inside a corresponding seat obtained in the box (3), having an edge (G3) that adheres and rubs against the internal ring (N1) of the bearing (N).
  • the gasket (G2) prevents water and any other impurity from penetrating inside the bearings (N) and reach the spaces (1 a) through said bearings (N), thereby impairing the correct operation of the stopping device.

Landscapes

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

Claims (6)

  1. Stoßdämpfende Arretiervorrichtung (A) für Rollläden oder Jalousien, umfassend:
    - ein mit einem Deckel (3a) geschlossenes Gehäuse (3),
    - einen Rotor (1), der dazu geeignet ist, fest mit einer Wickelwelle des Rollladens verbunden zu werden, wobei der Rotor (1) in dem Gehäuse (3) untergebracht ist, sich frei um eine horizontale Achse drehen kann und aus einer Art Zahnrad besteht, dessen Zähne durch Lücken (1 a) getrennt sind,
    - eine Vielzahl von Zylinderrollen (4), die in den Lücken (1 a) des Rotors (1) untergebracht sind,
    - einen Ring (2), in dem der Rotor (1) angeordnet und der dazu geeignet ist, vom Rotor (1) in Drehung versetzt zu werden, wobei am Innenrand des Rings (2) eine Schleife (2a) herausgearbeitet ist, die sich über einen Umfangbogen rittlings auf einem oberen Totpunkt (PMS) des Rundverlaufs einer jeden Rolle (4) erstreckt, bis der Rotor (1) sich zusammen mit der Wickelwelle des Rollladens dreht, und
    - eine feste Nocke (20), die mit den Rollen (4) zusammenwirkt, um sie aus den Lücken (1 a) des Rotors heraus in die Schleife (2a) des Rings (2) zu bringen,
    wobei die Vorrichtung (A) dadurch gekennzeichnet ist, dass
    der Ring (2) mindestens eine auf seinem Außenrand herausgearbeitete Flachstelle (5) aufweist, die an einem mit dem Gehäuse (3) fest verbundenen Anschlagelement (6) anstößt,
    das Anschlagelement (6) dazu geeignet ist, sich durch das Einwirken der Ränder der Flachstelle (5) elastisch zu verformen, wenn der Ring (2) durch die Mitnahme durch den Rotor (1) in Drehung versetzt wird,
    der Ring (2) auf seinem Außenrand mit einer Arretierklinke (8) versehen und in der Lage ist, an einem Zahn (9) auf Anschlag zu gehen,
    das Gehäuse (3) mit einem Gleit- und Führungssitz (11) für die Arretierklinke (8) versehen ist und die Arretierklinke (8) ein Profil (8a) aufweist, das mit einer Kante (10) des Sitzes (11) des Gehäuses in der Weise zusammenwirkt, dass das Gleiten im Endabschnitt mit einem Reiben zwischen den Kontaktflächen erfolgt, wodurch Energie zusätzlich durch Reibung dissipiert wird.
  2. Vorrichtung nach dem vorstehenden Anspruch, dadurch gekennzeichnet, dass der Ring (2) ein Paar diametral gegenüberliegende Flachstellen (5) aufweist, die jeweils an zwei Anschlagelemente (6) anstoßen.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Zahn (9) auf dem Deckel (3a) des Gehäuses (3) herausgearbeitet ist.
  4. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Schleife (2a) des Rings (2) an einem ihrer Enden eine abgerundete Stufe (2b) aufweist und der Ring (2) an der Stufe (2b) mit einem Hartmetalleinsatz (200) versehen ist.
  5. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Anschlagelement (6) aus einer Blattfeder (6) besteht, deren Enden (6a) in hierfür vorgesehenen Nischen (3c) des Gehäuses (3) eingehängt sind.
  6. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass jede Lücke (1 a) des Rotors eine gebogene Kerbe (1 b) auf ihrer Rückseite aufweist - bezogen auf die Drehrichtung des Rotors (1), die dem Absenken des Rollladens entspricht - sowie dadurch, dass die Kerbe (1 b) das Profil eines Viertelumfangs mit demselben Durchmesser wie die Zylinderrollen (4) besitzt, welche auf diese Weise in der Übergangsphase in einer wiegeähnlichen Ausgestaltung aufgenommen werden, in der die Rollen (4) aus den Lücken (1 a) ausgestoßen sind, wobei ferner vorgesehen ist, dass die Schleife (2a) des Rings an einem ihrer Enden eine abgerundete Stufe (2b) aufweist, die sich am Ende eines Schlaufenabschnitts mit einer gleichbleibenden, dem Radius der Rollen (4) entsprechenden Tiefe befindet.
EP09760626.3A 2008-10-01 2009-09-30 Stossabsorbierende haltevorrichtung für rollläden oder rollos Active EP2334889B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000177A ITMC20080177A1 (it) 2008-10-01 2008-10-01 Dispositivo di arresto ammmortizzato per serrande o tapparelle.
PCT/IT2009/000444 WO2010038250A2 (en) 2008-10-01 2009-09-30 Shock-absorbing stopping device for rolling shutters or blinds

Publications (2)

Publication Number Publication Date
EP2334889A2 EP2334889A2 (de) 2011-06-22
EP2334889B1 true EP2334889B1 (de) 2014-07-02

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Application Number Title Priority Date Filing Date
EP09760626.3A Active EP2334889B1 (de) 2008-10-01 2009-09-30 Stossabsorbierende haltevorrichtung für rollläden oder rollos

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EP (1) EP2334889B1 (de)
IT (1) ITMC20080177A1 (de)
WO (1) WO2010038250A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499324A (zh) * 2016-06-08 2017-03-15 漳州华维机械有限公司 一种适用于电动卷帘门机的刹车装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7535638U (de) * 1975-11-08 1976-06-10 Haake, Werner, 4426 Vreden Sicherungsvorrichtung fuer auf eine wickelwelle aufgerollte oeffnungsabschluesse
DE7901982U1 (de) * 1979-01-25 1979-04-26 Haake, Werner, 4426 Vreden Sicherungsvorrichtung fuer auf eine wickelwelle aufgerollte oeffnungsabschluesse
DE3140792C2 (de) 1981-10-14 1984-08-02 Josef Timmer Gmbh, 4420 Coesfeld Sicherungsvorrichtung gegen ungewolltes Abrollen von auf Wickelwellen aufgerollten Öffnungsabschlüssen
ITAN940011A1 (it) * 1994-03-09 1995-09-11 Gaposa Srl Dispositivo di arresto ammortizzato per serrande o tapparelle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499324A (zh) * 2016-06-08 2017-03-15 漳州华维机械有限公司 一种适用于电动卷帘门机的刹车装置

Also Published As

Publication number Publication date
EP2334889A2 (de) 2011-06-22
WO2010038250A2 (en) 2010-04-08
WO2010038250A3 (en) 2010-05-27
ITMC20080177A1 (it) 2010-04-02

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