EP0148185B1 - Dispositif de blocage d'une corde - Google Patents

Dispositif de blocage d'une corde Download PDF

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Publication number
EP0148185B1
EP0148185B1 EP19840900768 EP84900768A EP0148185B1 EP 0148185 B1 EP0148185 B1 EP 0148185B1 EP 19840900768 EP19840900768 EP 19840900768 EP 84900768 A EP84900768 A EP 84900768A EP 0148185 B1 EP0148185 B1 EP 0148185B1
Authority
EP
European Patent Office
Prior art keywords
locking
cord
locking arm
holder
arm
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
EP19840900768
Other languages
German (de)
English (en)
Other versions
EP0148185A1 (fr
Inventor
Torsten Frivalli
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.)
Frivalli Torsten
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 AT84900768T priority Critical patent/ATE30757T1/de
Publication of EP0148185A1 publication Critical patent/EP0148185A1/fr
Application granted granted Critical
Publication of EP0148185B1 publication Critical patent/EP0148185B1/fr
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
    • E06B9/24—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
    • E06B9/324—Cord-locks
    • 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
    • E06B9/78—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor for direct manual operation, e.g. by tassels, by handles

Definitions

  • This invention refers to a locking device for cords preferably but not exclusively intended to lock pulling cords for roller blinds, venetian blinds and the like and including a holder and a locking arm which is pivotally mounted in relation to said holder and has a pointed locking portion intended to be in preferably resilient contact with the cord.
  • a locking device of this general character is described in SE B-427203 as well as in WO 82/00849 and comprises a U-shaped holder and a locking arm positioned between the flanges of said holder and pivotally connected thereto by means of a transverse shaft.
  • the locking arm has a pointed portion by means of which the cord can be caught and pressed against the web portion of the holder. Since the pointed portion is to fulfill a clamping action it will be subjected to a wear which tends to ruin the shape of the point in that the sharp point will be pressed flat. The pointed portion is then no more capable of catching the cord without slip and such a slip further deteriorates the pointed portion such that the device can no longer serve its purpose. When the locking arm is made from metal the sharp point will have a tendency to cut the cord when pressing the latter against the web portion of the holder.
  • the primary object of the invention is to eliminate these drawbacks and to provide a locking action without slip and with a minimum of wear.
  • a further object is to provide a locking device which may be easily and rapidly mounted respectively dismantled.
  • numeral 1 generally designates the holder of the locking device.
  • This holder has a bottom wall 2, which is provided with countersunk holes 3 for fastening screws such that the holder can be secured to a support.
  • Projecting from the bottom wall are two spaced apart flanges 4a, 4b. The space between the flanges 4a, 4b is denoted 5 in the drawing.
  • each of the flanges 4a, 4b there is provided a hole 6 for a pivot shaft not shown.
  • the holes are of course coaxial.
  • the locking device further includes a locking arm, generally designated as 10, which has a portion 11 formed as a locking lug, an operating portion 12, two annular projections 14a, 14b which surround the pivot hole 13 of the locking arm, further a stud 15 extending from the operating portion 12 and preferably having a bead, intended to hold with friction one end of the spring 9, and finally a tongue 16 which terminates in a friction portion 17.
  • a locking arm generally designated as 10, which has a portion 11 formed as a locking lug, an operating portion 12, two annular projections 14a, 14b which surround the pivot hole 13 of the locking arm, further a stud 15 extending from the operating portion 12 and preferably having a bead, intended to hold with friction one end of the spring 9, and finally a tongue 16 which terminates in a friction portion 17.
  • the bottom surface of the space 5 is designated as 18 and the cord 19 is intended to be pressed against said bottom surface by the locking arm.
  • the width and the depth of the recesses 7a, 7b are dimensioned in such a manner relative to the dimension of the annular projections 14a, 14b that said projections, when inserted into the recesses 7a, 7b and in contact with the bottom of said recess will keep the locking arm positioned in such a manner relative to the holder that the holes 6 in the flanges of the hodler and the hole 13 in the locking arm will be concentric which means that the pivot shaft (not shown) can be inserted without any kind of adjustment and independent of the angular position of the locking arm relative to the holder. It is thus very easy for any person to assemble the locking device after a disassemblance thereof.
  • the locking arm as well as the holder is preferably made from a suitable plastic material.
  • the device works in the manner that the locking arm by means of the spring 9 normally is in contact with the cord 19 and thus clamps the cord to surface 18 by means of its locking lug 11.
  • the locking arm In order to release the cord for movement the locking arm is depressed by pressing a finger against the operating portion 12 thereof. Since in most cases, as in roller blinds, the cord is attached to an object which will give the cord an accelerating movement to the left in figure 1 it is of importance that this rapid movement can be retarded and for this purpose the locking arm is provided with the tongue 16 which by means of the friction portion 17 comes into contact with the cord when the locking arm is fully depressed. This retardation occurs softly and successively since the tongue is obliquely directed, possibly somewhat resilient and located at a relatively big distance from the pivot center of the locking arm.
  • the locking arm 10 has a first pointed portion 20 which easily can catch the cord and carry the latter.
  • This first, pointed portion has its point situated at such a distance from the pivot center X of the locking arm that the portion in question should not be able to lock the cord since it would not clamp it against the bottom 18 of the holder but instead just pass the locking position and then completely free the cord.
  • the pointed portion 20 will not come into contact with the cord until it is at a minor angular distance from a normal to the bottom surface passing through the pivot center X. This means that the pointed portion in question effectively engages the cord to catch and carry it and the wear of the point will be very moderate since no clamping action takes place.
  • the locking arm further has a second, locking portion 21, which is located at such an angular distance from the first, pointed portion 20 that said second clamping portion will not come into contact with the cord 19 until the first pointed portion has started to be carried by the cord but before it has been freed from it.
  • the design is preferably such that the second locking portion will come into contact with the cord just when the first pointed portion is passing through the locking position.
  • the second locking portion 21 can have the shape of a cam surface with a lowermost point 21a located at a certain distance from the pivot center X and a highest point 21b, located at a somewhat bigger distance from the pivot center X than the lowermost point 21a.
  • the locking device is not overloaded. Such an overloading can for instance occur when a curtain is forced downwards instead of being allowed to go down by means of its own weight and the weight of a rod. Such a maltreatment of a roller blind with pulling cord would mean damages to one or several parts of the blind.
  • At least one of the parts of locking arm has teeth.
  • the bottom 18 of the holder 1 there are in such a case provided a corresponding number of grooves which are located such that the teeth of the locking arm are received in said grooves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Clamps And Clips (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)

Abstract

Dispositif de blocage destiné à serrer une corde de traction d'un store à rouleaux, d'un store vénitien ou analogue, et comprenant un support (1) possédant deux rebords (4), entre lesquels est monté de manière pivotante un bras de blocage (10). Ce dernier possède une première partie (20) qui est pointue et une deuxième partie (21) disposée à un certain angle par rapport à la première partie et présentant une surface de came. La première partie (20) est disposée à une distance telle du centre de pivot du bras de blocage qu'elle peut traverser la position de blocage du dispositif de blocage portant la corde (19) sans la bloquer. La deuxième partie (21) est toutefois disposée à une distance telle du centre de pivot qu'elle ne peut traverser la position de blocage, ou qu'elle ne peut faire ceci que lorsqu'on lui applique une force considérable. Le bras de blocage possède un trou pour un arbre et un bourrelet annulaire est disposé à chaque extrémité autour du trou. Dans les rebords (4) du support sont aménagées des rainures (7) qu'épousent les bourrelets annulaires.

Claims (8)

1. Dispositif de blocage d'une corde, de préférence des cordes de traction pour jalousies ou analogues, comprenant un support (1) et un bras de blocage (10) monté de manière pivotante par rapport au support et muni d'un organe de blocage (20) pointu qui est destiné à être en contact, de préférence élastique, avec la corde, caractérisé par le fait que le bras de blocage (10) a un premier organe de blocage (20) pointu dont la pointe se trouve à une telle distance du centre de pivotement (X) que ladite pointe pivote sous l'action d'une force de traction modérée exercée sur la corde et passe par la position de blocage du premier organe de blocage, mais sans bloquer la corde, et que ledit bras de blocage (10) comporte, à une distance angulaire dudit premier organe (20), un second organe de blocage (21) ayant une surface de blocage (21 b) située à une telle distance plus grande du centre de pivotement (X) dudit bras de blocage que lorsque la corde est soumise à une force de traction, elle ne puisse pas passer ou puisse à peine passer par la position de blocage dudit second organe de blocage.
2. Dispositif de blocage selon la revendication 1, caractérisé par le fait que le second organe de blocage (21) présente une surface offrant à la corde (19) une surface de contact considérable.
3. Dispositif de blocage selon la revendication 1, caractérisé par le fait que la distance angulaire entre le premier organe (20) et le second organe (21) est telle que ledit second organe (21) ne se trouvera en contact avec la corde (19) que lorsque ledit premier organe (20) se trouve en contact avec la corde et commence à être supporté par la corde, mais avant que la corde et le premier organe (20) soient relâchés l'un de l'autre après avoir passé par la position de blocage du premier organe et de préférence en relation rapprochée au point où ledit premier organe (20) passera par sa position de blocage.
4. Dispositif de blocage selon la revendication 1, caractérisé par le fait que ledit second organe de blocage est sous forme d'une surface de came, la distance (21a, 21 b) de ladite surface par rapport au centre de pivotement (X) du bras de blocage augmentant successivement.
5. Dispositif de blocage selon la revendication 1, caractérisé par le fait qu'un au moins des organes du bras de blocage présente des dents radialement saillantes et que le support (1) présente dans sa face inférieure des rainures par lesquelles lesdites dents peuvent passer lorsque le bras de blocage passe par sa position de blocage.
6. Dispositif de blocage selon la revendication 1, caractérisé par le fait que le support (1) présente deux épaules espacées (4a, 4b) entre lesquelles le bras de blocage est monté de manière pivotante au moyen d'un arbre et que le bras de blocage (10) comporte au moins une portée (14a, 14b), de préférence annulaire faisant saillie latéralement et étant concentrique au trou (13) prévu pour l'arbre, qu'un évidement (7a, 7b) ouvert vers le haut est prévu dans une au moins des surfaces opposées des épaules (4a, 4b) du support (1), ledit évidement ayant une largeur correspondant sensiblement à la dimension extérieure de la portée, et une telle profondeur que le bras de blocage (10), lorsqu'il est inséré entre les épaules (4a, 4b) avec leur portée annulaire (14a, 14b) enfoncée dans l'évidement (7a, 7b) et s'appuyant sur le fond de l'évidement, soit aligné de telle manière par rapport au support (1) que le trou dans lequel va pivoter le bras de blocage (10) se trouve en face de trous correspondants (6) dans les épaules (4a, 4b) du support (1) de sorte que l'arbre puisse être introduit, sans opérations d'alignement, dans les trous d'arbre du support et du bras de blocage.
7. Dispositif de blocage selon la revendication 6, caractérisé par le fait que le bras de blocage (10) comporte une partie (15) destinée à retenir par frottement une extrémité d'un ressort de pression (9), dont l'extrémité opposée est introduite avec jeu dans une ouverture (8) prévue dans les épaules (4a, 4b) du support (1).
8. Dispositif de blocage selon la revendication 1, caractérisé par le fait que le bras de blocage comporte une languette (16) oblique qui se termine par une partie de frottement (17) et qui est située à une distance plus grande du centre de pivotement (X) du bras de blocage (10) qu'une partie (15) dudit bras, qui est destinée à retenir un ressort (9).
EP19840900768 1983-03-04 1984-02-07 Dispositif de blocage d'une corde Expired EP0148185B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84900768T ATE30757T1 (de) 1983-03-04 1984-02-07 Seilblockiervorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8301206A SE452783B (sv) 1983-03-04 1983-03-04 Anordning vid lasorgan for linor foretredesvis draglinor for rullgardiner och liknande
SE8301206 1983-03-04

Publications (2)

Publication Number Publication Date
EP0148185A1 EP0148185A1 (fr) 1985-07-17
EP0148185B1 true EP0148185B1 (fr) 1987-11-11

Family

ID=20350267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840900768 Expired EP0148185B1 (fr) 1983-03-04 1984-02-07 Dispositif de blocage d'une corde

Country Status (4)

Country Link
EP (1) EP0148185B1 (fr)
DE (1) DE3467388D1 (fr)
SE (1) SE452783B (fr)
WO (1) WO1984003535A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5998194A (en) * 1993-02-26 1994-09-14 Israel Karmel Shade operating system
GB2387195B (en) * 2002-04-04 2005-06-15 Sps Tensioning apparatus for a security closure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE357665B (fr) * 1968-03-21 1973-07-09 Bengtsson Sigurd W
SE427203B (sv) * 1979-09-04 1983-03-14 Enar Von Knorring Sperrorgan for draglinor
WO1982000849A1 (fr) * 1980-08-29 1982-03-18 T Swensson Dispositif de verrouillage et de guidage facilement demontable pour des cordes, de preference des cordes de traction pour des stores a rouleau

Also Published As

Publication number Publication date
DE3467388D1 (en) 1987-12-17
WO1984003535A1 (fr) 1984-09-13
EP0148185A1 (fr) 1985-07-17
SE452783B (sv) 1987-12-14
SE8301206D0 (sv) 1983-03-04
SE8301206L (sv) 1984-09-05

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