EP0380346B1 - Dispositif pour l'entraînement et la rotation des lamelles d'un store vénitien du type horizontal - Google Patents

Dispositif pour l'entraînement et la rotation des lamelles d'un store vénitien du type horizontal Download PDF

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Publication number
EP0380346B1
EP0380346B1 EP19900300811 EP90300811A EP0380346B1 EP 0380346 B1 EP0380346 B1 EP 0380346B1 EP 19900300811 EP19900300811 EP 19900300811 EP 90300811 A EP90300811 A EP 90300811A EP 0380346 B1 EP0380346 B1 EP 0380346B1
Authority
EP
European Patent Office
Prior art keywords
cord
spindle
lowering
winding drum
clutch spring
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 - Lifetime
Application number
EP19900300811
Other languages
German (de)
English (en)
Other versions
EP0380346A1 (fr
Inventor
Masaaki C/O Kabushiki Kaisha Nichibei Daizen
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.)
Nichibei Co Ltd
Original Assignee
Nichibei Co Ltd
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
Priority claimed from JP732489U external-priority patent/JPH076473Y2/ja
Priority claimed from JP732389U external-priority patent/JPH0712638Y2/ja
Application filed by Nichibei Co Ltd filed Critical Nichibei Co Ltd
Publication of EP0380346A1 publication Critical patent/EP0380346A1/fr
Application granted granted Critical
Publication of EP0380346B1 publication Critical patent/EP0380346B1/fr
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
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/303—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/308—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape with coaxial tilting bar and raising shaft
    • 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
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • 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
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • E06B2009/3225—Arrangements to aid the winding of cords rollers
    • 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
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • E06B2009/3225—Arrangements to aid the winding of cords rollers
    • E06B2009/3227—Axially moving rollers

Definitions

  • the present invention relates to a slat raising/lowering and rotating apparatus for a horizontal type venetian blind and has particular application to a slat raising/lowering and rotating apparatus including pull cords for raising and lowering horizontal slats and ladder cords for supporting the horizontal slats and for controlling rotation of them in which each pull cord is arranged to be wound onto or unwound from a winding drum to raise or lower the slats, and each ladder cord is mounted at its upper end on said winding drum, whereby raising and lowering of the slats and rotation of them can be controlled by operating a single rotating shaft for driving the winding drums.
  • a horizontal type venetian blind having a slat raising and lowering mechanism in which horizontal slats are raised or lowered under the action of pull cords which are arranged to be wound onto or unwound from winding drums driven by a single driving shaft to raise or lower the horizontal slats has been widely used.
  • the slat raising and lowering mechanism of the above kind has several disadvantages. Firstly, if the pull cord is collectively wound onto a particular position of the winding drum, a diameter of the cord wound onto the winding drum is gradually increased and a speed of winding the pull cord is gradually increased as an amount of the wound pull cord is increased. Secondly, if the pull cord becomes caught between the previously wound turns of the pull cord, the pull cord cannot be smoothly unwound from the winding drum when the slats are lowered.
  • the horizontal type venetian blind in which the slat raising/lowering operation and the slat rotating operation are effected by rotation of the single driving shaft usually comprises a slat raising/lowering and rotating mechanism including winding drums for winding pull cords for raising and lowering the slats and rotating drums supporting upper ends of ladder cords.
  • the slat raising and lowering speed is also decreased, while if the diameter of the winding drum is increased, the size of the headbox must be increased and the diameter of the winding drum is necessarily increased, with the result that the slat rotating characteristic is deteriorated, as described above.
  • the torque required to rotate the slats is necessarily increased and in the conventional construction in which the upper portion of the ladder cord is frictionally engaged on the winding drum, the larger friction is required, so that more heavy force is required to effect slat raising/lowering operation or the slat rotating characteristic is deteriorated.
  • Such actuating pieces act to loosen the clutch spring after completion of the slat rotating operation, so that the rotation of the slats can be smoothly effected. If the above-mentioned ladder cord narrowering construction is applied to this apparatus, the upper end portions of the ladder cord are directly connected to the outwardly projecting end portions of the clutch spring, so that the ladder cord constantly acts to decrease the diameter of the clutch spring, with the result that the operating force is increased.
  • US-A-3,310,099 discloses a venetian blind comprising a winding drum for the lift cord with a female thread formed along its axis, a drum bearing member passing through the winding drum and having a male thread formed to engage the female thread of the winding drum so that as the winding drum is rotated, the meshed threads cause the winding drum to move in an axial direction.
  • a ladder drum, for rotating ladder tapes has two axially extending lugs which engage hooks at respective ends of a clutch spring so that rotation of the cluth spring drives the ladder drum.
  • DE-A-1509809 discloses a clutch mechanism for holding the ladder cords and for transmitting a rotational force from the winding drum to the ladder cord in order to change the axial rotation of the blind slats.
  • the present invention provides a slat raisin/lowering apparatus as set out in claim 1.
  • An embodiment of the ivention provides a slat raising/lowering and rotating apparatus for a horizontal venetian blind including a cord winding drum for winding a slat raising/lowering cord theron, said cord winding drum being arranged in a headbox of the blind so that said winding drum is moved in axial direction, depending upon a rotation thereof, and a slat raising/lowering cord connected, at its upper end, to an end of said cord winding drum so that the cord is successively wound in a helical form around the winding drum, said apparatus comprising a male thread portion integrally formed near an end of said winding drum opposite to the end thereof to which the slat raising/lowering cord is connected and a drum bearing member for rotatably supporting said cord winding drum, said drum bearing member having an upwardly opened side and inner side walls having racks arranged to make meshing engagement with said male thread portion of the winding drum.
  • a slat raising/lowering and rotating apparatus for a horizontal venetian blind including a cord winding drum
  • the apparatus comprises a clutch spring having a diameter slightly smaller than an outer diameter of said winding drum and mounted thereon, said clutch spring being projected, at its both ends, outwardly of the winding drum, a support piece horizontally arranged and connected to an upper end of a ladder cord for supporting blind slats, said support piece being mounted on a peripheral surface of said winding drum at a position between the outwardly projected ends of said clutch spring, an actuating portion formed on a drum bearing member for supporting said winding drum, said actuating portion being arranged at a postion where said clutch spring comes into contact with said actuating portion, and a narrowering portion for narrowering a horizontal width of said ladder cord to a width smaller than an outer diameter of said winding drum.
  • Fig. 1 is an exploded perspective view of an embodiment of the present invention.
  • Fig. 2 is a side view, partly broken, of the embodiment shown in Fig. 1.
  • Figs. 3A, 3B and 3C are sectional views for explaining the operation of the embodiment shown in Fig. 1.
  • the apparatus shown in Figs. 1 and 2 includes a cord winding drum 1 for winding and unwinding a slat raising/lowering cord 2 for raising and lowering blind slats.
  • Said cord winding drum 1 is supported in a drum bearing member 3.
  • a rotating shaft 4 for driving said winding drum 1 is passed through the winding drum, so that said drum 1 is rotated by said rotating shaft 4 but it is freely slidable along its axial direction.
  • a ladder cord 5 is provided to support blind slats and to control rotation of the blind slats.
  • the slat raising/lowering and rotating apparatus is so constructed that slat raising/lowering operation and slat rotating operation can be controlled by rotating the single driving shaft in one direction or the other.
  • a male thread portion 11 is formed at one end of said winding drum 1.
  • the drum bearing member 3 for supporting the winding drum 1 is formed as an upwardly opened case, and rack portions 31 are formed on inside walls of said drum bearing member so that said male thread portion 11 is in meshing engagement with said rack portions 31.
  • the winding drum 1 when the rotating shaft 4 is rotated in one direction, the winding drum 1 is moved in an axial direction, so that the cord 2 is successively wound in a helical form around the winding drum 1, thereby raising the slats.
  • the winding drum 1 When the rotating shaft 4 is rotated in the other direction, the winding drum 1 is moved in the opposite axial direction, so that the cord 2 is successively unwound from the winding drum 1, thereby lowcring the slats.
  • a clutch spring 6 having an inner diameter slightly smaller than an outer diameter of the winding drum 1 is mounted on said winding drum 1.
  • the clutch spring 6 has projected portions 6a and 6b, at its both ends, which project outwardly of the winding drum 1.
  • the ladder cord 5 has a support piece 7 which is disposed in a horizontal direction at the upper end of said ladder cord. This support piece 7 is mounted on an outer surface of the winding drum 1 at a position between said outwardly projected end portions 6a and 6b of the clutch spring 6.
  • Actuating portions 8 are formed on the drum bearing member 3 for supporting the winding drum 1 and said actuating portions are arranged to receive the end portion 6a or 6b of the clutch spring 6.
  • Guide portions 9 are formed on the drum casing at positions where the ladder cord 5 passes into the drum bearing member. Said guide portions 9 serve to narrower a horizontal width of the ladder cord to a size smaller than the outer diameter of the winding drum 1.
  • Fig. 3A shows a state of the apparatus where the slats are not yet rotated.
  • the cord 2 is unwound from the winding drum 1, whereby the slats are lowered.
  • one vertical cord portion at one side of the ladder cord 5 moves in downward direction, while the other vertical cord portion at the outer side of the ladder cord moves in upward direction, whereby the slats are rotated in one direction.
  • the horizontal width of the ladder cord 5 is narrowered at its upper portion by the guide portions 9, as described above, so that the slats are forcibly rotated toward their vertical positions and thus superior rotating characteristic can be attained.
  • the clutch spring 5 is connected with the ladder cord through the intermediary of the horizontal support piece 7, as described above. At the time of the slat raising and lowering operation, one of the outwardly projected end portions of the clutch spring comes into engagement with the corresponding actuating portion of the drum bearing member, so that the clutch spring becomes expanded. Accordingly, the clutch spring is relieved of the load of the ladder cord, so that the operating force required to raise or lower the slats becomes lighter.
  • the support piece 7 attached to the upper end of the ladder cord 5 is slidable in circumferential direction around the winding drum 1 between the projected end portions 6a and 6b of the clutch spring, so that after the projected end portion of the clutch spring has come into engagement with the actuating portion 8, as shown in Fig.
  • the present embodiment provides a slat raising/lowering and rotating apparatus for a horizontal type blind in which a slat raising/lowering cord is wound on and unwound from a cord winding drum in a helical form, whereby the slat raising/lowering cord can be smoothly wound on and unwound from the winding drum, without causing gradual increasing of the wound diameter of the cord or without causing the cord to be caught between the previously wound turns of the slat raising/lowering cord.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)

Claims (5)

  1. Dispositif d'entraînement de lamelles pour un store vénitien du type horizontal dans lequel un cordon d'entraînement de lamelles (2) est enroulé autour ou déroulé d'un axe (1) pour entraîner les lamelles et dans lequel l'axe (1) comporte un filet de vis (11) pour déplacer celui-ci dans le sens axial pendant sa rotation ce qui a pour effet de permettre l'enroulement du cordon d'entraînement des lamelles (2) sur l'axe (1) de manière hélicoïdale,
       caractérisé en ce que
       le filet de vis (11) est un filet extérieur et en ce que le dispositif comprend une crémaillère (31) s'étendant dans le sens longitudinal de l'axe (1) avec lequel s'engrène son filet de vis (11) pour entraîner celui-ci dans le déplacement axial.
  2. Dispositif selon la revendication 1, dans lequel la crémaillère (31) est une partie d'un élément (3) qui supporte l'axe (1).
  3. Dispositif selon la revendication 2, dans lequel l'élément (3) est ouvert vers le haut.
  4. Dispositif selon la revendication 1, dans lequel un moyen de guidage (9) est disposé à un emplacement où un cordon d'articulation (5) est introduit dans le dispositif pour rétrécir une largeur horizontale du cordon d'articulation (5) jusqu'à une largeur inférieure au diamètre extérieur de l'axe (1).
  5. Dispositif selon la revendication 1, dans lequel le dispositif comprend un embrayage à ressort (6) ayant un diamètre légèrement inférieur à un diamètre extérieur de l'axe (1) et qui est monté sur l'axe (1), l'embrayage à ressort (6) faisant saillie vers l'extérieur, à ses deux extrémités, un élément de support (7) disposé dans le sens horizontal et connecté à une extrémité supérieure d'un cordon d'articulation (5) pour supporter des lamelles de store, l'élément de support étant monté sur un pourtour extérieur de l'axe (1) à un emplacement situé entre les parties de saillie extérieures aux deux extrémités de l'embrayage à ressort (6), et
       des parties de commande (8) formées sur un élément de support d'axe (3) et disposées pour venir en aboutement contre une extrémité de l'embrayage à ressort (6).
EP19900300811 1989-01-25 1990-01-25 Dispositif pour l'entraînement et la rotation des lamelles d'un store vénitien du type horizontal Expired - Lifetime EP0380346B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP732489U JPH076473Y2 (ja) 1989-01-25 1989-01-25 ブラインドの昇降コード巻取り装置
JP7323/89U 1989-01-25
JP7324/89U 1989-01-25
JP732389U JPH0712638Y2 (ja) 1989-01-25 1989-01-25 横型ブラインドのスラット昇降回転機構

Publications (2)

Publication Number Publication Date
EP0380346A1 EP0380346A1 (fr) 1990-08-01
EP0380346B1 true EP0380346B1 (fr) 1994-04-13

Family

ID=26341596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900300811 Expired - Lifetime EP0380346B1 (fr) 1989-01-25 1990-01-25 Dispositif pour l'entraînement et la rotation des lamelles d'un store vénitien du type horizontal

Country Status (2)

Country Link
EP (1) EP0380346B1 (fr)
DE (1) DE69007992T2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0551486A1 (fr) * 1991-08-02 1993-07-21 Gen Clutch Corp Store a lamelles a commande unique.
EP0554212A1 (fr) * 1992-01-30 1993-08-04 Somfy Dispositif d'enroulement de cordon de suspension de store
EP0600133A1 (fr) * 1992-12-04 1994-06-08 Nien Made Enterprise Co., Ltd. Dispositif d'inclinaison
WO2001018346A1 (fr) 1999-09-09 2001-03-15 Silent Gliss International Ag Store en lamelles
AU737382B3 (en) * 2001-02-15 2001-08-16 Tai-Ping Liu Lift control device for a roller shade

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6964291B2 (en) 2003-01-14 2005-11-15 Ren Judkins Double shade headrail with removable cord collection spools
WO2004088085A1 (fr) * 2003-03-31 2004-10-14 Art Andersen A/S Venitienne
ES2380981T3 (es) * 2009-08-21 2012-05-22 Jørn Krab Holding APS Mecanismo de elevación para persianas venecianas
CN102733742A (zh) * 2012-07-17 2012-10-17 苏州太丰玻璃饰品有限公司 一种中空玻璃内置遮阳装置绕绳结构
CN105293209B (zh) * 2015-11-24 2018-09-14 雷振邦 无操作绳窗帘的收线机构
CH712613A1 (de) * 2016-06-29 2017-12-29 Storenmaterial Ag Lamellenstore.
CN106968584B (zh) * 2017-05-31 2018-07-31 义乌市斯卡丹遮阳设备有限公司 一种百叶窗帘卷绳器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH400817A (de) * 1963-05-24 1965-10-15 Griesser Ag Raff-Lamellenstore
ES320723A1 (es) * 1964-12-19 1966-05-16 Russo Giuseppe Dispositivo de mando para persianas graduables.
US3310099A (en) * 1965-07-19 1967-03-21 Hunter Electric venetian blind

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0551486A1 (fr) * 1991-08-02 1993-07-21 Gen Clutch Corp Store a lamelles a commande unique.
EP0554212A1 (fr) * 1992-01-30 1993-08-04 Somfy Dispositif d'enroulement de cordon de suspension de store
FR2686934A1 (fr) * 1992-01-30 1993-08-06 Somfy Dispositif d'enroulement de cordon de suspension de store.
US5328113A (en) * 1992-01-30 1994-07-12 Somfy Device for winding the suspension cord of a blind
EP0600133A1 (fr) * 1992-12-04 1994-06-08 Nien Made Enterprise Co., Ltd. Dispositif d'inclinaison
WO2001018346A1 (fr) 1999-09-09 2001-03-15 Silent Gliss International Ag Store en lamelles
AU737382B3 (en) * 2001-02-15 2001-08-16 Tai-Ping Liu Lift control device for a roller shade

Also Published As

Publication number Publication date
EP0380346A1 (fr) 1990-08-01
DE69007992T2 (de) 1994-09-01
DE69007992D1 (de) 1994-05-19

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