EP0356403B1 - A roller blind having a stop device with a cylindrical cam - Google Patents

A roller blind having a stop device with a cylindrical cam Download PDF

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Publication number
EP0356403B1
EP0356403B1 EP89830346A EP89830346A EP0356403B1 EP 0356403 B1 EP0356403 B1 EP 0356403B1 EP 89830346 A EP89830346 A EP 89830346A EP 89830346 A EP89830346 A EP 89830346A EP 0356403 B1 EP0356403 B1 EP 0356403B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
roller
blind
cam
fixed shaft
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
Application number
EP89830346A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0356403A1 (en
Inventor
Sergio Mottura
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.)
Mottura SpA
Original Assignee
Mottura SpA
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 Mottura SpA filed Critical Mottura SpA
Publication of EP0356403A1 publication Critical patent/EP0356403A1/en
Application granted granted Critical
Publication of EP0356403B1 publication Critical patent/EP0356403B1/en
Expired 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
    • E06B9/90—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions

Definitions

  • the present invention relates to a roller blind of the type comprising:
  • a roller blind according to the pre-characterising portion of claim 1, which is known from EP-A-O 087 146.
  • This document shows a stop device for a roller blind, comprising a coil spring brake mounted on the fixed shaft on which the roller carrying the blind is rotatable mounted.
  • a cam sleeve has a Y-shaped cam groove engaged by a cam pin connected to the roller. The cam pin relatively moves along the cam groove and pushes the cam sleeve to loosen the coil spring brake when the blind is drawn and when it is released after drawn from a lowered position.
  • the spring brake fastens the cam sleeve to the fixed shaft when the blind is released after drawn from the uppermost position.
  • a roller blind having a stop mechanism including a ring having two oppositely disposed pawls which are adapted to co-operate with a ratchet and are maintained in contact therewith by a spring.
  • the present invention has the object of providing a stop device more functional and reliable than devices used hitherto.
  • this object is achieved by a roller blind according to claim 1.
  • a roller blind according to the present invention is generally indicated 1.
  • the blind 1 includes a horizontal roller 2 which can rotate freely about its own axis and is supported at its ends by two brackets 3 fixed to the wall by means of screws.
  • a blind 4 is rolled onto the roller 2 and has an upper end (not shown in the drawings) which is fixed to the roller and a free lower end provided with a stiffening rod 5.
  • the roller 2 has a hollow interior and carries within it a fixed shaft 6 (Fig. 3 ).
  • the shaft 6 has a flattened end, indicated 7, which projects from the roller 2 and is supported by the bracket 3 which is on the left in Figure 1.
  • a spacer tube 6a is supported on the end of the shaft 6 which faces inwardly of the roller 2 (Figs.
  • helical spring 11 Fixed to the support 8 is the end of a helical spring 11 the other end of which is fixed to a larger-diameter part 12 of the shaft 6.
  • helical spring 11 and the support 8 together constitute a device which constantly biasses the roller 2 towards the position in which the blind 4 is completely rolled up.
  • a stop device is arranged on the shaft 6 for enabling the blind 4 to be locked in any lowered position against the biassing action of the helical spring 11.
  • the device 13 includes a bush 14 situated within the roller 2 in correspondence with its end which is on the left in Figure 1.
  • the bush 14 is connected for rotation with the roller 2 by means of a longitudinal groove 15 which is formed in its lateral surface and engages the longitudinal rib 9 of the roller 2.
  • the end of the bush 14 which faces inwardly of the roller 2 bears against a larger-diameter part 16 of the shaft 6.
  • a portion of the shaft 6 passes through the bush 14 and projects from the roller 2 for insertion, as stated, in the left-hand bracket 3.
  • a sleeve 16 is arranged within the bush 14 for rotation relative thereto and is free to slide along its own axis.
  • a track 17 of cam mechanism is formed in the internal surface of the sleeve 16.
  • the track 17 is engaged by an entrainment pin 18 which is fixed to the lateral wall of the bush 14 and is directed radially inwardly of the bush 14.
  • the end of the sleeve 16 which faces outwardly of the roller 2 is provided with saw-teeth 19.
  • the teeth 19 face corresponding teeth 20 formed on the portion of a stop body 21 which faces inwardly of the roller 2.
  • the body 21 is bored internally and its inner surface carries a projection 22 which is engaged in a longitudinal groove 23 formed in the shaft 6, making the body 21 fast to the shaft 6.
  • a resilient ring 24 is engaged in a seat 25 on the shaft 6 and prevents axial movements of the stop body 21.
  • the sleeve 16 is mounted for rotation on a hollow cylindrical body which is in turn mounted for sliding on the shaft 6.
  • the body 26 carries an internal projection 27 which engages the groove 23 of the shaft 6 and prevents the body 26 from rotating relative to the shaft 6.
  • the lateral surface of the body 26 has a set of circumferential teeth 30 which are snap-engaged by a resilient tongue 31 carried by the sleeve 16, for preventing the sleeve 16 from rotating relative to the shaft 6 when the sleeve 16 is not positively entrained in rotation.
  • the end of the body 26 which faces outwardly of the roller 2 has a circumferential projection 28 which engages an internal abutment 29 of the sleeve 16 to prevent axial movements of the sleeve.
  • a resilient ring 32 engages a seat 33 for the axial restraint of the sleeve 16.
  • the cylindrical body 26 carries a helical spring 34 wound with radial intereference around its lateral surface.
  • the ends of the spring 34 are bent radially towards the outside of the spring to form two stalks 35.
  • the stalks 35 engage opposite sides of a pin 36 which projects axially from the sleeve 16.
  • the sleeve 16 remains stationary, until the pin 18 reaches the position P2, and, at this point, if the blind 4 is lowered further, the pin 18 causes the sleeve 16 to move in the direction indicated by the arrow Z and is brought into the position indicated P3.
  • the sleeve 16 is moved towards the stop body 21 by a distance a but the teeth 19 and 20 are not yet engaged.
  • the pin 18 remains in the position P3 as long as the blind 4 continues to be lowered.
  • the blind 4 reaches the desired position, the blind is released and is rolled back by the helical spring 11.
  • the pin 18 is thus moved in the opposite direction from the arrow Y and is brought to the position P4, causing a further movement of the sleeve 16 in the direction Z by a distance b.
  • the teeth 19 and 20 mesh with each other and are kept in contact by the biassing force of the helical spring 11.
  • the blind 4 is lowered from the position in which it was locked. This brings the pin 18 into the position P5, moving the sleeve 16 away from the stop body 21 and disengaging the teeth 19 and 20.
  • the roller 2 is free to rotate in the sense in which the blind is rolled up and the entrainment pin 18 is brought to the starting position P1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Blinds (AREA)
EP89830346A 1988-08-01 1989-07-25 A roller blind having a stop device with a cylindrical cam Expired EP0356403B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6773088 1988-08-01
IT67730/88A IT1223746B (it) 1988-08-01 1988-08-01 Tenda a rullo con dispositivo di arresto a camma cilindrica

Publications (2)

Publication Number Publication Date
EP0356403A1 EP0356403A1 (en) 1990-02-28
EP0356403B1 true EP0356403B1 (en) 1992-12-02

Family

ID=11304847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830346A Expired EP0356403B1 (en) 1988-08-01 1989-07-25 A roller blind having a stop device with a cylindrical cam

Country Status (4)

Country Link
EP (1) EP0356403B1 (es)
DE (1) DE68903707T2 (es)
ES (1) ES2036372T3 (es)
IT (1) IT1223746B (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007002632A1 (de) 2007-01-12 2008-07-17 Vkr Holding A/S Kupplung für eine Wickelwelle eines Springrollos

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2656147B2 (ja) * 1990-10-13 1997-09-24 立川ブラインド工業株式会社 ロールブラインドのスクリーン昇降装置
US5566741A (en) * 1993-06-02 1996-10-22 Kabushiki Kaisha Nichibei Roll screen apparatus
US5890529A (en) * 1997-01-29 1999-04-06 Kirsch Inc. Dual action retractable cord take-up reel
US6467714B1 (en) * 1997-07-16 2002-10-22 A/S Chr. Fabers Fabriker Winding mechanism for roller blinds
US6131642A (en) * 1998-09-28 2000-10-17 Hunter Douglas International N.V. Locking device
ITBO20020082A1 (it) 2002-02-19 2003-08-19 Dalex S R L Gruppo operativo per tendine con rullo avvolgitore
CZ297232B6 (cs) * 2002-09-26 2006-10-11 Isotra S.R.O. Ovládací mechanismus, zejména pohonného ústrojí roletek
PL218655B1 (pl) * 2009-05-05 2015-01-30 Franc Gardiner Spółka Z Ograniczoną Odpowiedzialnością Mechanizm blokujący ruch obrotowy wałka nawojowego rolety o napędzie sprężynowym, zwłaszcza rolety okiennej
US8746320B2 (en) * 2010-02-26 2014-06-10 Teh Yor Co., Ltd. Window covering with improved controls
EP2539526B1 (en) * 2010-02-26 2021-04-07 Teh Yor Co., Ltd. Window covering with improved controls
DE102014006268B4 (de) * 2014-04-30 2022-07-07 Lisa Dräxlmaier GmbH Rollomechanik
JP6740034B2 (ja) * 2016-06-29 2020-08-12 下西技研工業株式会社 ロータリーダンパー
CN109774433B (zh) * 2018-11-30 2021-04-09 宁波百易东和汽车部件有限公司 一种双轨遮蔽装置及其应用方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189412A (en) * 1921-11-25 1923-07-06 Alfred Coindet Improvements in and relating to blinds
JPS58143086A (ja) * 1982-02-19 1983-08-25 ト−ソ−株式会社 ロ−ルブラインドのクラツチ装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007002632A1 (de) 2007-01-12 2008-07-17 Vkr Holding A/S Kupplung für eine Wickelwelle eines Springrollos
EP1947289A2 (de) 2007-01-12 2008-07-23 VKR Holding A/S Kupplung für eine Wickelwelle eines Springrollos
DE102007002632B4 (de) * 2007-01-12 2008-08-28 Vkr Holding A/S Kupplung für eine Wickelwelle eines Springrollos

Also Published As

Publication number Publication date
DE68903707D1 (de) 1993-01-14
IT8867730A0 (it) 1988-08-01
IT1223746B (it) 1990-09-29
DE68903707T2 (de) 1993-04-01
EP0356403A1 (en) 1990-02-28
ES2036372T3 (es) 1993-05-16

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