EP1760251A2 - Sicherheitsvorrichtung gegen Absturz für Rollläden mit Torionsfedern - Google Patents

Sicherheitsvorrichtung gegen Absturz für Rollläden mit Torionsfedern Download PDF

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Publication number
EP1760251A2
EP1760251A2 EP06425616A EP06425616A EP1760251A2 EP 1760251 A2 EP1760251 A2 EP 1760251A2 EP 06425616 A EP06425616 A EP 06425616A EP 06425616 A EP06425616 A EP 06425616A EP 1760251 A2 EP1760251 A2 EP 1760251A2
Authority
EP
European Patent Office
Prior art keywords
pawl
spring
pin
drum
microswitch
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.)
Withdrawn
Application number
EP06425616A
Other languages
English (en)
French (fr)
Other versions
EP1760251A3 (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 EP1760251A2 publication Critical patent/EP1760251A2/de
Publication of EP1760251A3 publication Critical patent/EP1760251A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E05D13/10—Counterbalance devices
    • E05D13/12—Counterbalance devices with springs
    • E05D13/1253—Counterbalance devices with springs with canted-coil torsion springs
    • E05D13/1269—Spring safety devices
    • 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
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • 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
    • 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

Definitions

  • the present patent application refers to an anti-fall safety device for rolling shutters with torsion rings, of the type commonly used to close garages and shops.
  • This type of shutters is rolled around a series of rotating pulleys inserted along a fixed support shaft, on which the top slate of the rolling shutter is fixed, it being normally provided with compensation means to balance the weight of the rolling shutter and consequently minimize the effort needed to raise the shutter, both in case of manual or motorized operation.
  • the said compensation means basically consist in a spring, which can be either a torsion spring or a hinge spring, and is always associated with one of the said pulleys, whose shape depends on the type of spring used.
  • the pulley has a box-shaped configuration, designed to house a steel belt wound in a spiral and suitably loaded to generate a reaction torque able to balance the force exercised by the rolling shutter on the pulleys due to its weight.
  • the pulley has a simple, traditional configuration, with spokes and is attached to the end of a traditional torsion spring, of helicoidal type, inserted outside the fixed shaft.
  • said rolling shutters In compliance with the recent accident-prevention legislation, said rolling shutters must be provided with a safety device designed to prevent them from collapsing suddenly and uncontrollably in case of spring failure.
  • the purpose of the present invention is to design an anti-fall safety device to be installed in rolling shutters around a series of rotating pulleys supported by a fixed shaft and attached to a torsion spring.
  • Another purpose of the present invention is to devise an anti-fall device of the aforementioned type, characterised by simple and convenient construction, easy installation, removal and repair.
  • another purpose of the present invention is to devise an anti-fall device of the aforementioned type that does not require to modify or adjust the rolling shutter, being designed to be installed both on new and existing rolling shutters.
  • the device of the invention comprises two main elements, with a torsion spring placed and attached between them: the first element consists in a bracket fitted to the fixed shaft that supports the series of rotating pulleys around which the shutter is rolled; and the second element consists in a special pulley designed to be joined with the top slate of the rolling shutter, in such a way that the ascending and descending travels of the rolling shutter depend on the free rotation, both anticlockwise and clockwise, of the special pulley.
  • the special pulley is formed of a fixed hub, which is inserted and stopped against the fixed support shaft, and a drum, which rotates freely in two directions around the fixed hub, which is characterised by an external toothed profile that cooperates with a balancing retention pawl contained in said drum, which is automatically actuated when the torsion spring breaks, since the pawl is held in rest position by the torsion spring itself.
  • the device of the invention comprises a microswitch designed to immediately inform the user of the failure of the spring (by means of indicator lights or acoustic means), thus simultaneously cutting out the electrical power supply of the motor, in case of a motorized rolling shutter.
  • the said microswitch is housed in the fixed bracket and actuated by a fluctuating pawl, which is constantly subject to the opposite action of the return spring and slowed down by the same fixing pin of the torsion spring.
  • the fixing pin is free to slide within a slot, thus being unable to oppose the movement of the said fluctuating pawl as soon as the torsion spring breaks.
  • the device of the invention comprises two main elements (A and B), with a torsion spring (M) placed and attached between them.
  • the first element (A) consists in a bracket (1) with a hub (1a) designed to be inserted and held against the fixed shaft (2) that supports the series of rotating pulleys around which the rolling shutter is rolled.
  • a pin (3) protrudes from the bracket (1), in parallel position to the axis of the shaft (2), which is used to attach one end (M1) of the spring (M).
  • the second element (B) consists in a special pulley with a hub (4) designed to be inserted and held against the fixed shaft (2) that supports the series of rotating pulleys around which the rolling shutter is wound.
  • a drum (5) is inserted outside the hub (4) and free to rotate in both directions, which is peripherally provided with a series of slots (6) used as fixing points for the top slate of the rolling shutter.
  • the rotating drum (5) is formed of a central collar (5a) and an opposite pair of closing plates (5b and 5c), which are mutually tightened and fixed to the intermediate collar by means of a series of screws.
  • Each plate (5b and 5c) is provided with a corresponding collar (5b' and 5c') inserted and free to rotate around the hub (4).
  • a toothed crown (7) is obtained outside the hub (4), around which the drum (5) rotates, housing a balancing pawl designed to interfere with the toothed crown (7) in case of failure of the spring (M), in order to prevent the free, uncontrolled descending travel of the rolling shutter.
  • Fig. 9 also shows the return spring (10) inserted into the pin (8a) and attached to a hole (8b) of the pawl (8) on one side and to a hole (9b) obtained in one of the housings (9).
  • the two plates (5b and 5c) are provided with opposite slots (11) used to insert a pin (12) that externally protrudes on the plate (5b) in order to be attached to the other end (M2) of the spring (M), as shown in fig. 1.
  • the end section (12a) of the pin (12) is inserted into an eye (13a) on the tip of a wing (13b) moulded in one piece with a collar (13), in parallel position outside the plate (5b) and inserted, around the collar (5b') with possibility to rotate freely.
  • the pawl (8) is blocked in rear position (rest position) with respect to the toothed crown (7), since the return spring (10) cannot overcome the opposed thrust of the pin (12) against the pawl (8).
  • the device of the invention has been designed in order to facilitate installation and replacement of the torsion spring (M).
  • the device of the invention Since the replacement of a broken spring (M) involves the complete descending travel of the rolling shutter, the device of the invention has been provided with means that allow the operator in charge of installation and repair to exclude the braking action of the pawl (8), also when the pin (12) is released from the spring (M).
  • the pawl (8) has been provided with a hooked head (8c), whose hook engages with the teeth (14a) of a forked appendix (14) obtained inside the collar (5a) of the drum (5).
  • the pawl (8) has been provided with a flexible tongue (8d) situated near its tip (8e), designed to release the pawl (8) from the toothed crown (7) during replacement of the broken spring (M).
  • the said replacement requires to lower the rolling shutter completely, whose descending travel is instead prevented by the pawl (8), being momentarily engaged with the toothed crown (7).
  • teeth of the toothed crown (7) are laterally provided with small notches (15) that act as a stable housing for the tip of the flexible tongue (8d) during the turnover of the pawl (8).
  • the hooked head (8c) engages and snaps with the teeth (14a) of the forked appendix (14), as shown in figs. 7 and 8.
  • Fig. 8 shows the blocking position of the pawl (8) until a spring (M) is not attached to the pin (12), which is not shown in figs. 6, 7 and 8 deliberately.
  • the pin (12) interferes against the partition (14b) that acts as a lever to determine the downward flexion of the forked appendix (14), thus releasing the tooth (14a) from the hooked head (8c) of the pawl (8), which moves forward under the return action of the spring (10) and stops against the pin (12) in the position shown in fig. 3.
  • the device of the invention comprises a microswitch (15) designed to immediately cut out the electrical power supply of the motor, in case of a motorized shutter, as soon as the torsion spring (M) breaks.
  • the microswitch (15) is housed in a protection hood (16) and is supported by a box (17) fixed to the bracket (1).
  • the microswitch (15) is actuated by means of a balancing cam (18), which is provided with a hole (18a) where the pivoting pin (17a) is inserted, used to match the cam (18) with the box (17).
  • the fixing pin (3) protrudes from the cam (18), which is provided with a slot (18b) on the opposite side with respect to the pin (3), which houses a sliding peg (19a) that protrudes from a cursor (19) acting on the microswitch (15).
  • a return spring (20) between the cam (18) and the box (17) constantly tends to make the cam (18) oscillate in the direction in which the coupling between the slot (18b) and the peg (19a) brings the cursor (19) closer to the microswitch (15).
  • the return spring (20) rotates the cam (18) and simultaneously makes the peg (19a) slide with respect to the housing slot (18b) and the fixing pin (3) inside a slot (1b) of the bracket (1).
EP06425616A 2005-09-06 2006-09-04 Sicherheitsvorrichtung gegen Absturz für Rollläden mit Torionsfedern Withdrawn EP1760251A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMC20050089 ITMC20050089A1 (it) 2005-09-06 2005-09-06 Dispositivo di sicurezza, anti-caduta, per serrande avvolgibili, compensate con molle di torsione

Publications (2)

Publication Number Publication Date
EP1760251A2 true EP1760251A2 (de) 2007-03-07
EP1760251A3 EP1760251A3 (de) 2012-07-25

Family

ID=37600789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06425616A Withdrawn EP1760251A3 (de) 2005-09-06 2006-09-04 Sicherheitsvorrichtung gegen Absturz für Rollläden mit Torionsfedern

Country Status (2)

Country Link
EP (1) EP1760251A3 (de)
IT (1) ITMC20050089A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010034156A1 (zh) * 2008-09-26 2010-04-01 Tu Qiwen 无回卷冲击力的卷帘纱窗纱门
WO2019025522A1 (en) * 2017-08-04 2019-02-07 Assa Abloy Entrance Systems Ab ASSEMBLY COMPRISING HOUSING WITH A BALANCING SPRING BREAKAGE MECHANISM FOR A DOOR SYSTEM, SUCH AS A SECTIONAL DOOR SYSTEM, AND DOOR SYSTEM COMPRISING THE ENTIRELY
IT201900017567A1 (it) * 2019-09-30 2021-03-30 Moveup S R L Gruppo integrato per l’azionamento motorizzato di una serranda avvolgibile.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151427A2 (de) * 1984-01-24 1985-08-14 Hörmann KG Brockhagen Federüberwachungsgerät
DE9310792U1 (de) * 1993-07-19 1994-05-19 Hoermann Kg Federüberwachungsgerät
EP1213428A1 (de) * 2000-12-07 2002-06-12 Flexi-Force B.V. Absturzsicherung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151427A2 (de) * 1984-01-24 1985-08-14 Hörmann KG Brockhagen Federüberwachungsgerät
DE9310792U1 (de) * 1993-07-19 1994-05-19 Hoermann Kg Federüberwachungsgerät
EP1213428A1 (de) * 2000-12-07 2002-06-12 Flexi-Force B.V. Absturzsicherung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010034156A1 (zh) * 2008-09-26 2010-04-01 Tu Qiwen 无回卷冲击力的卷帘纱窗纱门
WO2019025522A1 (en) * 2017-08-04 2019-02-07 Assa Abloy Entrance Systems Ab ASSEMBLY COMPRISING HOUSING WITH A BALANCING SPRING BREAKAGE MECHANISM FOR A DOOR SYSTEM, SUCH AS A SECTIONAL DOOR SYSTEM, AND DOOR SYSTEM COMPRISING THE ENTIRELY
US11767696B2 (en) 2017-08-04 2023-09-26 Assa Abloy Entrance Systems Assembly comprising a housing with a balancing spring break protection mechanism for a door system such as a sectional door system and a door system including the assembly
IT201900017567A1 (it) * 2019-09-30 2021-03-30 Moveup S R L Gruppo integrato per l’azionamento motorizzato di una serranda avvolgibile.
EP3798406A1 (de) 2019-09-30 2021-03-31 Moveup S.r.l. Integrierte anordnung für die motorisierte betätigung eines rollladens

Also Published As

Publication number Publication date
ITMC20050089A1 (it) 2007-03-07
EP1760251A3 (de) 2012-07-25

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