EP0787885A2 - Vorrichtung zur Unfallverhütung zum Stoppen motorisierter Rolläden - Google Patents

Vorrichtung zur Unfallverhütung zum Stoppen motorisierter Rolläden Download PDF

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Publication number
EP0787885A2
EP0787885A2 EP97830021A EP97830021A EP0787885A2 EP 0787885 A2 EP0787885 A2 EP 0787885A2 EP 97830021 A EP97830021 A EP 97830021A EP 97830021 A EP97830021 A EP 97830021A EP 0787885 A2 EP0787885 A2 EP 0787885A2
Authority
EP
European Patent Office
Prior art keywords
wheel
flange
stopping
pins
prevention device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97830021A
Other languages
English (en)
French (fr)
Other versions
EP0787885B1 (de
EP0787885A3 (de
Inventor
Dante Postacchini
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.)
Gaposa SRL
Original Assignee
Gaposa SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gaposa SRL filed Critical Gaposa SRL
Publication of EP0787885A2 publication Critical patent/EP0787885A2/de
Publication of EP0787885A3 publication Critical patent/EP0787885A3/de
Application granted granted Critical
Publication of EP0787885B1 publication Critical patent/EP0787885B1/de
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
    • E06B9/56—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

Definitions

  • This patent application concerns an improved accident prevention device for stopping motorised rolling shutters.
  • the device in question is designed to automatically stop the shutter if the coupling between the teeth of the worm screw and that of the wheel splined directly on the rolling shutter shaft in the gearmotor should fail for any unexpected, accidental reason or wear of the gears causing said shutter to fall.
  • the device in question is designed to improve similar devices of the type consisting of a single worm screw engaging with two adjacent gear wheels, one being the main wheel and the other the secondary wheel in that the first drives the movement while the second, which rotates with respect to the first, activates the stopping means in the case of an emergency.
  • the rotation between the two wheels is in fact used as a fault signal and simultaneously as a signal to activate the mechanical stopping means of the shutter winding shaft.
  • the main problem encountered on this type of stopping devices is that the secondary wheel remains engaged with the worm screw even after the stopping means have been activated so that although the worm screw continues to be subject to a drive moment, it is also stopped abruptly together with the secondary wheel with which the same engages.
  • the scope of this invention is to perfect said stopping devices so that the secondary wheel is automatically disengaged from the worm screw when the means which stop the secondary wheel and consequently the shutter winding shaft, are activated.
  • the device according to the invention has been designed in this prospective, where the worm screw of the gearmotor engages simultaneously with a pair of adjacent gear wheels which are not however splined to the shutter winding shaft since the drive from the gearmotor to the above shaft occurs by means of a flange fixed on the internal face of the main wheel provided with a hub splined on the shutter winding shaft.
  • the secondary wheel is in fact centred on said hub and can rotate and translate.
  • the secondary wheel is moreover provided with one or more curved slots characterised by a centre groove, in which the enlarged head of the same number of stopping pins projecting from the face of said flange, attaches.
  • the longitudinal axis of these curved slots consists of an arch whose centre coincides with that of the two adjacent wheels.
  • a series of annular springs being provided between the flange and secondary wheel which exercise on the latter an axial thrust that tends to detach the secondary wheel from the main wheel.
  • the enlarged head of the stopping pins can detach and disengage from the centre groove of the slots of the secondary wheel which springs axially forward sliding along the hub of the flange until it disengages from the worm screw.
  • the secondary wheel is stopped thanks to front teeth on the external face which wedge into teeth on the internal face of the gearmotor casing, against which said secondary wheel is pushed by the above springs.
  • stoppage of the secondary wheel will correspond to stoppage of the flange whose free rotation will be impeded by the enlarged head of the stopping pins engaged in the slots of the secondary wheel.
  • stoppage of the flange will correspond to stoppage of the shutter winding shaft in that the hub of the flange is splined on the shaft.
  • the stopping device in question is of the type consisting of a gearmotor whose worm screw (1) engages simultaneously with two adjacent gear wheels, namely a main (2) and a secondary (3) wheel; the first (2) rotates the winding shaft of the shutter and the second (3) stops said shaft if the first wheel (2) accidentally disengages from the worm screw (1).
  • Neither of these wheels are splined on the shaft (not illustrated in the enclosed drawings) in that the transmission of the wheel (2) movement of the shaft occurs by means of a flange (4) provided with a hub (4a) splined on the shaft.
  • This flange (4) is fixed, and in the case in question screwed, on the internal face (2a) of the main wheel (2), while the secondary wheel is centred on the hub (4a) and can rotate and translate axially with respect to the hub.
  • the secondary wheel (3) is provided with a pair of diametrically opposing identical slots (3a) having a curved profile and provided with a centre groove (3b) of reduced width, into which the enlarged head (5a) of the stopping pins (5) fixed on the flange (4) and projecting from the latter on the part interfaced to the internal side of the secondary wheel (3) which is provided with front teeth (3c) on its external face, namely that facing the opposing wall of the casing (6) of the gearmotor, engage.
  • a series of annular compressed springs (7) being provided between the flange (4) and the secondary wheel (3) which constantly exercise an axial thrust on the wheel (3) tending to detach the latter from the main wheel (2).
  • this detachment between the main wheel (2) and the secondary wheel (3) may occur only if the stopping pins (5) slide in the slots (3a) and project from the centre groove (3b) so that the enlarged heads (5a) may house in the slots (3a).
  • the stoppage of the wheel (3) corresponds to the stoppage of the flange (4) and consequently that of the shutter winding shaft on which the flange (4) hub (4a) is splined.
  • the secondary wheel (3) is provided with a second pair of curved slots (8) identical to the slots (3a) but without centre groove (3b).
  • pins (9) in fact do not perform a hooking action with respect to the secondary wheel (3) but simply assist the pins (5) during the emergency stopping phase in the sense that said pins (9) support, together with the pins (5), the stress due to the abrupt stopping of the wheel (3) when the pins (5 and 9) slide in the corresponding slots (3a and 8) and abut simultaneously against the bottom of the corresponding housing slot.
  • the flange (4) is fixed to the main wheel (2) by means of the screws (10) which fix the pins (5 and 9) to the flange (4).
  • the pins (5 and 9) are provided with an axial threaded hole in which the screws (10) which pass through holes (11) on the wheel (2) and on the flange (4), engage.
  • the main wheel (2) may be splined directly on the shutter winding shaft, so that the flange (4) is no longer required, provided the springs (7) and the stopping pins (5) with enlarged head (5a) are used.
  • the flange (4) is used only for cost related reasons, since the main wheel (2) is generally made of expensive brass, while the worm screw is made of steel.
  • the realisation of the wheel (2) in brass complete with hub, would be too expensive so that use of the steel hub (4a), which is an integral part of the steel flange (4), which is fixed to the wheel (2) made of expensive brass, has been preferred.
  • this description refers to rolling shutters, it is evident that the accident prevention device in question may also be used in the same way and with the same efficiency, as an emergency stop, for any rotating winding shaft, whether or not the element to wind is a shutter rather than a blind, a wire, chain or cable etc.

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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)
  • Transmission Devices (AREA)
EP97830021A 1996-01-31 1997-01-28 Vorrichtung zur Unfallverhütung zum Stoppen motorisierter Rolläden Expired - Lifetime EP0787885B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMC960012 1996-01-31
IT96MC000012A IT1289323B1 (it) 1996-01-31 1996-01-31 Dispositivo antinfortunio perfezionato, per l'arresto delle serrande avvolgibili,motorizzate

Publications (3)

Publication Number Publication Date
EP0787885A2 true EP0787885A2 (de) 1997-08-06
EP0787885A3 EP0787885A3 (de) 1998-06-10
EP0787885B1 EP0787885B1 (de) 2002-08-28

Family

ID=11357135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830021A Expired - Lifetime EP0787885B1 (de) 1996-01-31 1997-01-28 Vorrichtung zur Unfallverhütung zum Stoppen motorisierter Rolläden

Country Status (3)

Country Link
EP (1) EP0787885B1 (de)
DE (1) DE69714878T2 (de)
IT (1) IT1289323B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10385612B2 (en) 2017-10-12 2019-08-20 Chung-Hsien Hsieh Door curtain anti-dropping device having latching pin locking mechanism
US10676991B2 (en) 2017-10-16 2020-06-09 Chung Hsien Hsieh Door curtain anti-dropping device having latching pin locking mechanism
EP3865446A1 (de) * 2020-02-12 2021-08-18 Framo Morat GmbH & Co. KG Getriebe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129648A1 (de) * 1981-07-28 1983-02-17 W. u. H. Neukirchen GmbH & Co KG, 4060 Viersen Antrieb fuer ein rolltor
DE3427505A1 (de) * 1984-07-26 1986-02-06 Menke, Wilhelm, 4425 Billerbeck Fangvorrichtung fuer rolltore, rollgitter o.dgl.
DE4324866A1 (de) * 1993-07-23 1995-01-26 Tornado Antriebstech Gmbh Fangeinrichtung für Antriebe von Rolltoren

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129648A1 (de) * 1981-07-28 1983-02-17 W. u. H. Neukirchen GmbH & Co KG, 4060 Viersen Antrieb fuer ein rolltor
DE3427505A1 (de) * 1984-07-26 1986-02-06 Menke, Wilhelm, 4425 Billerbeck Fangvorrichtung fuer rolltore, rollgitter o.dgl.
DE4324866A1 (de) * 1993-07-23 1995-01-26 Tornado Antriebstech Gmbh Fangeinrichtung für Antriebe von Rolltoren

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10385612B2 (en) 2017-10-12 2019-08-20 Chung-Hsien Hsieh Door curtain anti-dropping device having latching pin locking mechanism
US10676991B2 (en) 2017-10-16 2020-06-09 Chung Hsien Hsieh Door curtain anti-dropping device having latching pin locking mechanism
EP3865446A1 (de) * 2020-02-12 2021-08-18 Framo Morat GmbH & Co. KG Getriebe

Also Published As

Publication number Publication date
ITMC960012A0 (de) 1996-01-31
DE69714878T2 (de) 2003-08-07
ITMC960012A1 (it) 1997-07-31
EP0787885B1 (de) 2002-08-28
IT1289323B1 (it) 1998-10-02
EP0787885A3 (de) 1998-06-10
DE69714878D1 (de) 2002-10-02

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