EP0246338A1 - Limit stop device for the opening of sun curtains - Google Patents

Limit stop device for the opening of sun curtains Download PDF

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Publication number
EP0246338A1
EP0246338A1 EP86106759A EP86106759A EP0246338A1 EP 0246338 A1 EP0246338 A1 EP 0246338A1 EP 86106759 A EP86106759 A EP 86106759A EP 86106759 A EP86106759 A EP 86106759A EP 0246338 A1 EP0246338 A1 EP 0246338A1
Authority
EP
European Patent Office
Prior art keywords
teeth
pin
cylinder
curtain
roller
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Withdrawn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
EP86106759A
Other languages
German (de)
French (fr)
Inventor
Carlo Maurizio Pozzi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP86106759A priority Critical patent/EP0246338A1/en
Publication of EP0246338A1 publication Critical patent/EP0246338A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F10/00—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
    • E04F10/02—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins
    • E04F10/06—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building
    • E04F10/0644—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with mechanisms for unrolling or balancing the blind
    • E04F10/0648—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with mechanisms for unrolling or balancing the blind acting on the roller tube
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F10/00—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
    • E04F10/02—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins
    • E04F10/06—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building
    • E04F10/0611—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with articulated arms supporting the movable end of the blind for deployment of the blind
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F10/00—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
    • E04F10/02—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins
    • E04F10/06—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building
    • E04F10/0611—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with articulated arms supporting the movable end of the blind for deployment of the blind
    • E04F10/0618—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with articulated arms supporting the movable end of the blind for deployment of the blind whereby the pivot axis of the articulation is perpendicular to the roller
    • 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
    • E06B9/88—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for limiting unrolling
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F10/00—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
    • E04F10/02—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins
    • E04F10/06—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building
    • E04F10/0685—Covers or housings for the rolled-up blind

Definitions

  • This specification relates to a limit stop device for the opening of sun curtains.
  • the sun curtains are wound on a roller secured to a wall and which is caused to rotate in one direction or the opposite direction to unwind and re-wind the curtain.
  • the end of the curtain is secured to a frontal rod supported by two articulated arms fitted with springs and which tend elastically to move the rod away from his housing applied on the wall in order to keep the curtain constantly stretched.
  • the curtain When the arms are extended to their maximum limit, and if the user is not careful, in continuing to turn the roller, the curtain will first loosen and may, immediately, after, rewind itself on the roller in the opposite direction and this may damage the curtain, and prevent a correct gripping of the frontal rod on the housing.
  • the purpose of the invention is to provide a device apt to interrupt the unwinding of the curtain from the roller when the supporting arms of the frontal rod have reached their maximum extent of opening, so that even a distracted user will not be able to unwind the curtain more than necessary or rewind it in the opposite direction, which would damage both the curtain and the mechanism.
  • the device which exploit's the tendency of sun curtains to open under the action of sprung arms, is characterized by a ratchet mechanism fitted in the roller of the curtain; said mechanism consists of a small cylinder applied in the cavity of the roller and which is pro­vided with at least two fixed teeth projecting toward the axis of the cylinder itself and by a pin, rotatable within said cylinder, provided with sprung teeth apt to engage or not with the fixed teeth of the cylinder, depending on their rotating direction.
  • the mechanism is conceived so that by turning the pin in one direction, the oscillating teeth disengage from those of the cylinder, thereby enabling, thanks to the action exerted by the frontal rod, the opening by snap action of the curtain, which, in this way, cannot proceed beyond the maximum opening position, while turning the pin in the opposite direc­tion, the oscillating teeth engage with the small cylinder to re-wind the curtain.
  • Fig. 1 the sun curtain 1 is wound on a roller 2, inserted in a housing 3. End 4 of the curtain is secured to a cross frontal bar 5, sus­tained at both its ends, by arms 6 and 7 which tend to move away, elastically, frontal bar 5 from housing 3 by means of spring 8.
  • Device 10 consists of a cylinder 12 which, in the case illustrated in Fig. 3, is provided internally with three teeth 14 of rectan­gular cross section, integral with cylinder 12.
  • the center part of cylinder 12 is provided with a port 18 for a pin 20 restrained with a retaining ring inside the roll.
  • pin 20 With pin 20 are integral a flange 22 inside cylinder 12 and an external flange 24 which practically is a closing cap for the cylinder itself. Flanges 22 and 24 retain, in the case shown in the drawings, three pins 26 on each of which is mounted an oscillating tooth 30 fitted with a spring 32 which tends to urge each tooth 30 elastically toward the exterior.
  • the oscillating teeth 30 have a substantially lenticular shaped cross section and a curved back 33. Teeth 30 are provided, at their free end, with an edge 34 apt to engage with the base of said rectangular teeth 14 crossing the internal surface 35 of cylinder 12.
  • the cylinder is secured in the hollow of roller 2 by shrinkage.
  • pin 20 terminates with a square end on which a toothed wheel (not shown) is secured, said wheel being moved by an endless screw housed in box 50 and which is integral with a shaft 52 provided with an eyelet 54 to which can be applied a handle bar, apt to be rotated in one direction or the other by the user to unwind or rewind the curtain.
  • the length of curtain wound on the roller can thus be limited to the necessary extent, thereby affording a saving of cloth.

Abstract

The limit stop device for the opening of sun curtains exploits the tendency of cross frontal bar (5) urged by arms (6,7) to unroll the curtain from roller (2) on which it is wound.
The device consists of a ratchet mechanism (10) comprising a cylinder (12) provided with teeth (14) and inside which turns a pin (20) having spring teeth (30).
The rotation of pin (20) in one direction, disen­gages teeth (30) from the teeth (14) of cylinder (12), thereby allowing the curtain to unroll in steps only up to the maximum possible opening while in the opposite direction it allows re­winding of the curtain on roller (2)

Description

  • This specification relates to a limit stop device for the opening of sun curtains. The sun curtains are wound on a roller secured to a wall and which is caused to rotate in one direction or the opposite direction to unwind and re-wind the curtain.
  • The end of the curtain is secured to a frontal rod supported by two articulated arms fitted with springs and which tend elastically to move the rod away from his housing applied on the wall in order to keep the curtain constantly stretched.
  • When the arms are extended to their maximum limit, and if the user is not careful, in continuing to turn the roller, the curtain will first loosen and may, immediately, after, rewind itself on the roller in the opposite direction and this may damage the curtain, and prevent a correct gripping of the frontal rod on the housing.
  • To avoid this drawback, a greater length than necessary of curtain normally is wound on the roller, corresponding for example to two or three turns of the roller, but this expe­dient simply increases costs, without ensuring a good result.
  • The purpose of the invention is to provide a device apt to interrupt the unwinding of the curtain from the roller when the supporting arms of the frontal rod have reached their maximum extent of opening, so that even a distracted user will not be able to unwind the curtain more than necessary or rewind it in the opposite direction, which would damage both the curtain and the mechanism.
  • According to the invention, the device which exploit's the tendency of sun curtains to open under the action of sprung arms, is characterized by a ratchet mechanism fitted in the roller of the curtain; said mechanism consists of a small cylinder applied in the cavity of the roller and which is pro­vided with at least two fixed teeth projecting toward the axis of the cylinder itself and by a pin, rotatable within said cylinder, provided with sprung teeth apt to engage or not with the fixed teeth of the cylinder, depending on their rotating direction.
  • The mechanism is conceived so that by turning the pin in one direction, the oscillating teeth disengage from those of the cylinder, thereby enabling, thanks to the action exerted by the frontal rod, the opening by snap action of the curtain, which, in this way, cannot proceed beyond the maximum opening position, while turning the pin in the opposite direc­tion, the oscillating teeth engage with the small cylinder to re-wind the curtain.
  • An embodiment of the invention will now be described in more detail, by way of example, with reference to the drawings.
    • Fig. 1 is a view in transversal cross section of the sun curtain to which the device according to the invention is applied.
    • Fig. 2 is a longitudinal view, in cross section of the device, shown on a larger scale.
    • Fig. 3 is a transversal view in cross section, taken on line III-III of Fig. 2.
  • In Fig. 1 the sun curtain 1 is wound on a roller 2, inserted in a housing 3. End 4 of the curtain is secured to a cross frontal bar 5, sus­tained at both its ends, by arms 6 and 7 which tend to move away, elastically, frontal bar 5 from housing 3 by means of spring 8.
  • Device 10, according to the invention (see Figs. 2 and 3) consists of a cylinder 12 which, in the case illustrated in Fig. 3, is provided internally with three teeth 14 of rectan­gular cross section, integral with cylinder 12.
  • The center part of cylinder 12 is provided with a port 18 for a pin 20 restrained with a retaining ring inside the roll.
  • With pin 20 are integral a flange 22 inside cylinder 12 and an external flange 24 which practically is a closing cap for the cylinder itself. Flanges 22 and 24 retain, in the case shown in the drawings, three pins 26 on each of which is mounted an oscillating tooth 30 fitted with a spring 32 which tends to urge each tooth 30 elastically toward the exterior.
  • The oscillating teeth 30 have a substantially lenticular shaped cross section and a curved back 33. Teeth 30 are provided, at their free end, with an edge 34 apt to engage with the base of said rectangular teeth 14 crossing the internal surface 35 of cylinder 12.
  • The cylinder is secured in the hollow of roller 2 by shrinkage.
  • In the opposite part of device 10 (on the right hand side of fig. 2) pin 20 terminates with a square end on which a toothed wheel (not shown) is secured, said wheel being moved by an endless screw housed in box 50 and which is integral with a shaft 52 provided with an eyelet 54 to which can be applied a handle bar, apt to be rotated in one direction or the other by the user to unwind or rewind the curtain.
  • From the above description the operation of the device according to the invention is well evidenced.
  • In fact, considering Fig. 1 in the steady position shown on the drawing curtain 1, stretched elastically by arms 6,7 in the direction of arrow F cannot unwind itself from roller 2 as teeth 14 of cylinder 12 are engaged with oscillating teeth 30 these being in turn secured (through pin 20) to the endless screw gear which is in fact irreversible.
  • By turning shaft 52 (see fig. 2) so that the pin rotates clockwise, oscillating teeth 30 disengage from rectan­gular teeth 14 and the curtain can unwind in successive steps from roller 2.
  • When arms 6 and 7 are fully extended the traction exerted on the curtain ceases and consequently, oscillating teeth 30 continue turning idle.
  • In this way, even a distracted user will not be able to unwind the curtain from the roller beyond the position of maximum opening, and this avoids all possible drawbacks.
  • The length of curtain wound on the roller can thus be limited to the necessary extent, thereby affording a saving of cloth.
  • Also the rewinding of the curtain on roller 2 cannot be subject to errors, as the user, in turning the pin clockwise erroneously does not obtain any effect, while, if the rotating direction is reversed, oscillating teeth 30 engage with teeth 14 of cylinder 12 to permit rewinding of the curtain.

Claims (5)

1) Limit stop device for sun curtain wound on a roller (2) and having their ends (4) secured to a frontal cross bar (5) urged outwardly by spring arms (6,7), characterized by a ratchet mechanism (10) fitted in one of the ends of roller (2) of the curtain, where said mechanism consists of a cylin­der (12) provided with integral rectangular cross section teeth (14) projecting towards the axis of the cylinder and by a pin (20) rotatable inside said cylinder and provided with elastically oscillating teeth (30) arranged in a manner such that by turning the pin in one direction, teeth (30) disengage teeth (14) from cylinder (12), thereby to permit a step by step opening movement of the curtain drawn by cross bar (5), and which stops in the maximum extended position of arms (6,7) or in any intermediate position, whilst by turning pin (20) in the opposite direction the elastically oscillating teeth (30) engage with teeth (14) of the cylinder to re-wind the curtain on roller (2).
2) Device according to claim 1, characterized in that pin (20) is rotatable in a port (18) in the center part of cylinder (12).
3) Device according to claims 1 and 2, characterized in that teeth (30) of the ratchet mechanism (10) oscillate on pins (26) the ends of which are secured on the one end to a flange (22) and on the other end to an outer flange (24) both inte­gral with pin (20) and of which flange (24) acts as a protect­ing cover for the opening of cylinder (12).
4) Device according to claim 3, characterized in that each of oscillating teeth (30) is elastically urged in a centrifugal direction by the action of a spring (32) the open ends of which rest, the one on pin (20) and the other on the surface of the tooth facing pin (20) itself.
5) Device according to claims 3 and 4 characterized in that oscillating teeth (30) have a lenticular shaped cross section so that, in the part corresponding to the end secured to pins (26), the thickness of tooth (30) is such as to enable its insertion tangentially with the surface of its back (33), substantially up to the mid part of rectangular teeth (14) so as to avoid scraping against the edges of said teeth (14).
EP86106759A 1986-05-17 1986-05-17 Limit stop device for the opening of sun curtains Withdrawn EP0246338A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP86106759A EP0246338A1 (en) 1986-05-17 1986-05-17 Limit stop device for the opening of sun curtains

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86106759A EP0246338A1 (en) 1986-05-17 1986-05-17 Limit stop device for the opening of sun curtains

Publications (1)

Publication Number Publication Date
EP0246338A1 true EP0246338A1 (en) 1987-11-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106759A Withdrawn EP0246338A1 (en) 1986-05-17 1986-05-17 Limit stop device for the opening of sun curtains

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EP (1) EP0246338A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697577A1 (en) * 1992-11-03 1994-05-06 Simu Awning and roller shutter automatic disengaging release - comprises bushing reamed to receive wedge sliding in slots in shaft projecting from winch automatic control when shutter closed.
EP0694439A3 (en) * 1994-07-26 1996-05-01 Carlo Maurizio Pozzi Winder for operating awnings, particularly for vehicles in general
WO1997012104A1 (en) * 1995-09-28 1997-04-03 Gerhard Geiger Gmbh & Co. Awning drive
FR2774722A1 (en) * 1998-02-12 1999-08-13 White Hall Naamloze Vennootsch Housing for roll-up awning
WO2000053881A1 (en) * 1999-03-05 2000-09-14 Vkr Holding A/S An operating device for window openers, screening arrangements and similar devices
ES2235554A1 (en) * 2001-03-23 2005-07-01 Gaviota Simbac, S.L. Axial spring tensioner for tensioning arms of awning, has piece whose axial unit is attached with support, where support is provided with terminal that is equipped in arm handle by connecting units
EP1686231A1 (en) * 2005-01-14 2006-08-02 Griesser Holding AG Device for avoiding damage to hangings

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR340510A (en) * 1904-02-17 1904-07-08 Oswald Assmann Roller blind
US1342017A (en) * 1919-09-04 1920-06-01 Fox Harold Edgar Spring roller-blind
US1876939A (en) * 1930-08-12 1932-09-13 Excel Curtain Company Curtain roller construction
FR1193253A (en) * 1958-03-14 1959-11-02 Perrier Sa Device intended to limit the unwinding of rotating shutters
FR2042030A5 (en) * 1969-04-21 1971-02-05 Selve Ernst
FR2478728A1 (en) * 1980-03-20 1981-09-25 Imbac Spa AUTOMATIC TRIGGERING DEVICE FOR LOWERING LIMIT SWITCH, COUPLING TO DRIVE WINCHES, ROLLING SHUTTERS, CURTAINS AND THE LIKE

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR340510A (en) * 1904-02-17 1904-07-08 Oswald Assmann Roller blind
US1342017A (en) * 1919-09-04 1920-06-01 Fox Harold Edgar Spring roller-blind
US1876939A (en) * 1930-08-12 1932-09-13 Excel Curtain Company Curtain roller construction
FR1193253A (en) * 1958-03-14 1959-11-02 Perrier Sa Device intended to limit the unwinding of rotating shutters
FR2042030A5 (en) * 1969-04-21 1971-02-05 Selve Ernst
FR2478728A1 (en) * 1980-03-20 1981-09-25 Imbac Spa AUTOMATIC TRIGGERING DEVICE FOR LOWERING LIMIT SWITCH, COUPLING TO DRIVE WINCHES, ROLLING SHUTTERS, CURTAINS AND THE LIKE

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697577A1 (en) * 1992-11-03 1994-05-06 Simu Awning and roller shutter automatic disengaging release - comprises bushing reamed to receive wedge sliding in slots in shaft projecting from winch automatic control when shutter closed.
EP0694439A3 (en) * 1994-07-26 1996-05-01 Carlo Maurizio Pozzi Winder for operating awnings, particularly for vehicles in general
WO1997012104A1 (en) * 1995-09-28 1997-04-03 Gerhard Geiger Gmbh & Co. Awning drive
FR2774722A1 (en) * 1998-02-12 1999-08-13 White Hall Naamloze Vennootsch Housing for roll-up awning
WO2000053881A1 (en) * 1999-03-05 2000-09-14 Vkr Holding A/S An operating device for window openers, screening arrangements and similar devices
US6581666B1 (en) 1999-03-05 2003-06-24 Vkr Holding A/S Operating device for window openers, screening arrangements and similar devices
ES2235554A1 (en) * 2001-03-23 2005-07-01 Gaviota Simbac, S.L. Axial spring tensioner for tensioning arms of awning, has piece whose axial unit is attached with support, where support is provided with terminal that is equipped in arm handle by connecting units
EP1686231A1 (en) * 2005-01-14 2006-08-02 Griesser Holding AG Device for avoiding damage to hangings

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