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
  • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
• • 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 invention relates to a suspension cord winding device comprising a winding drum on which is fixed the end of at least one suspension cord.
• a helical groove is disposed on the outer surface of the drum.
• a guiding means makes it possible to position the cord in the groove during winding.
• Blinds whether they be canvases, venetian blinds, pleated blinds or other, generally comprise two suspension cords, one end of which is fixed to the winding drum and the other end is fixed to the free end. of the awning.
• the object of the invention is to provide a blind suspension cord winding device remedying the disadvantages mentioned above and improving the blind suspension cord winding devices known from the prior art.
• the invention proposes a blind suspension cord winding device to avoid the phenomena of overlapping turns and locking of the winding device.
• the blind suspension cord winding device is defined by claim 1.
• FIG. 1 is a representation of an installation comprising two winding devices according to the invention
• FIG. 2 is a partial view of a first embodiment of a winding device according to the invention
• FIG. 3 is a partial sectional view along line II of FIG. 2
• FIG. 4 is a section of a helical groove of a second embodiment of a winding device according to the invention
• FIG. 5 is a partial section of a winding drum forming part of a variant of the second embodiment of a winding device according to the invention
• FIG. 6 is a partial view in half-section along the line III.
• FIG. 7 of a third embodiment of a winding device according to the invention FIG. 7 is a partial sectional view along the line H-II of FIG. 6 of the third embodiment of FIG. a winding device according to the invention.
• the winding cord 10 of the invention is intended to be integrated in an installation 1 as shown in FIG. 1.
• This installation can be a motorized venetian blind comprising a load bar 2 and orientable blades.
• the load bar 2 is connected to the winding devices 10 by two cords 4.
• Each winding device 10 comprises a drum 11 having a helical groove in which is housed the corresponding bead 4 and a guide means 12 allowing position the cord in the groove.
• the two drums 11 are interconnected by a shaft 5.
• This shaft 5 is rotated by a drive means 6 which can be a manual control or a motor.
• Blade orientation means may also be provided. It can be independent of the winding device or be associated with it.
• the winding devices 10 and the driving means 6 are integrally arranged inside a box 7.
• Two kinematics are possible for the winding of the cord.
• the guide means 12 is fixed and the drum 11, rotated by the shaft 5, is free in axial translation with respect to this shaft 5.
• the guide means 12 comprises a fixed shape complementary to the groove being housed in it.
• the second alternative reverses the kinematics.
• the guide means 12 becomes mobile in translation but locked in rotation while the drum 11 becomes fixed in translation but still rotated by the shaft 5.
• the principle of the invention is to provide in a groove of the drum a blocking means integral with the drum.
• This locking means makes it possible to deliberately hold the cord in the groove of the drum. In the case where the locking means exerts a direct force on the cord, this effort is controlled and determined.
• integral is meant that any movement of the drum causes a movement of the locking means.
• the connection between the locking means and the drum is of the embedding type and is for example made by molding the drum with the locking means or by any other means for fixing the locking means on the drum.
• the locking means is integral with the drum permanently.
• FIGS 2 and 3 show in detail a first embodiment of the winding device according to the invention.
• the cord 4 is held in the groove 11 R by means of a helical spring 13 with a variable helix angle.
• the portions of turns between which the bead must be stuck have a helix angle equal to or substantially equal to the angle of the groove.
• the complementary portions of the turns have a different helix angle so that the pitch of the spring is equal to the pitch of the groove.
• the helix angle changes continuously along the spring.
• the spring is housed in a recess 11 E of the drum 11. The recess extends for example axially on the drum along the groove.
• the cord 4 is secured to the drum 11 on the side A by pinching effect of the cord between two successive turns of the spring.
• the cord 4 wraps around it by placing itself in the groove 11 R.
• the spring 13 is dimensioned and positioned in the recess 11 E so that the cord 4 is clamped between two turns of the spring 13 when it passes through.
• the helical groove 11 R is discontinuous, interspersed with space corresponding to the recess 11 E. When the cord passes through this space, it is pinched by two turns of the spring 13 housed in this recess. Several conditions are thus necessary.
• the gap between two successive turns is smaller than the diameter of the cord.
• the pitch of the helix of the groove is equal to or is a multiple of the pitch of the spring.
• the bead will jam in the spring every n turns of the spring.
• the outer radius of the spring R13 added to the spacing E between the drum 11 and the spring 13 is preferably greater than or equal to the outside radius of winding of the cord Re4.
• means are provided to prevent rotation of the spring relative to its axis relative to the drum.
• Other springs may be disposed on the periphery of the drum to increase the holding of the cord. With this type of design, the spring is interchangeable which allows to better control the clamping force and to wind cords of different diameters (with a suitable spring size).
• the spring may be of the helical type with a constant helix angle.
• the helix angle of the spring is different from that of the groove and, in addition to the wedging effect between the turns of the spring, there is a baffle effect when the cord goes from the groove to the spring and or from the spring to the groove.
• Figure 4 shows a second embodiment of the winding device.
• the cord 4 is trapped in a helical groove 11 R '.
• the walls 20 of the section of the groove are closed so that the cord can not leave the section without effort.
• the walls 20 are closed by the presence at their outer ends of two extensions 21 extending axially.
• the opening O of the groove defined by the distance between two extensions 21 of the groove is smaller than the diameter D4 of the bead.
• These extensions 21 may be continuous throughout the groove or discontinuous, on defined areas, every half-turns, for example.
• the section can be closed permanently or closed once the cord 4 is in the section, zipper type system.
• the drum 11 has a helix 40 with an L section.
• This helix can be continuous or discontinuous.
• the turns or portions of turn are connected to the hub of the drum 11 by hinges 41. They are bistable.
• the two portions shown on the left occupy a first stable position C and the two portions represented on the right occupy a second stable position D.
• Means (not shown) make it possible to tilt the portions between the two positions over the rotation of the drum.
• the winding groove of the bead is formed by the gap between the turns of the propeller 40. The gap between two turns does not occupy the same stable position is much greater than that existing between two turns occupying stable positions D.
• the bead can be retained between the different turns occupying the position D and can leave or come to wind without stress on the drum at the level of interstice separating two turns not occupying the same position.
• the blocking means can only prevent the bead from coming out of the groove.
• the cord is, in this case, free movement within the section of the groove which allows, with a suitable section, to equip the device cords of different sizes.
• FIG. 6 A third embodiment of the winding device is shown in Figures 6 and 7.
• the bead is pinched by clamping between walls 11 P1, 11 P2 deformable side of a groove 11 R ".
• the cord 4 is located in the groove 11 R ", as described in the first embodiment.
• the cord will deform the side walls 11 P1, 11 P2 of the groove until the cord is pressed against a stop, for example a rib 11 N.
• the winding is regular , the inner winding diameter is constant and corresponds to the Rb4 dimension of the abutment.
• the deformed walls apply, in return, efforts on the bead 4 which, taking into account the coefficient of friction at the cord-wall interface, prevents the cord out of the groove 11 R "as a radial force of a certain intensity is not achieved.
• an interstitial space 11 E1 is provided between two consecutive walls
• the side walls 11 P1 and 11 P2 deform in the interstitial space by the action of the cord.This deformation does not affect the pressure exerted on the cord in other sections of the groove. It is preferable that the deformation of these walls is elastic.
• the nip allows it to push it outside the box, that is to say, in the box, the cord remains in the groove section and then leaves the section at the guiding means.
• the risk of overlap is thus reduced.
• the advantage of a continuous pinch is the absence of loose parts in the box. The risk of overlap is therefore non-existent.
• the winding diameter of the bead is constant, which is essential to maintain the horizontality of a load bar moved by identical drums.
• the groove is in the shape of a "U".
• U is meant a section having two side walls for applying pressure on the cord, the other sides may take different forms.
• the invention provides a device for holding the cord in the groove of the drum during a maneuvering the blind with a locking means which prevents the cord from leaving the section of the groove of the drum.
• This means being integral with the drum, the risk of blocking the device is then reduced.
• the cord can be partially held, that is to say it is not maintained continuously along the groove.
• One advantage may be the simplification of the realization of the drum.
• the locking means it would be preferable for the locking means to be arranged every U-turns, to facilitate the demolding of a possible drum made of plastic.
• a standard helical groove provided in a winding drum and in which the bead would accidentally jam is obviously not a locking means integral with the drum.

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• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Blinds (AREA)
• Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38047998

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (3)

• 2006
  • 2006-10-05 FR FR0608754A patent/FR2906834B1/fr not_active Expired - Fee Related
• 2007
  • 2007-10-01 CN CNA2007800372680A patent/CN101523008A/zh active Pending
  • 2007-10-01 WO PCT/IB2007/002901 patent/WO2008041097A2/fr active Application Filing
  • 2007-10-01 EP EP07805013A patent/EP2076651A2/de not_active Withdrawn

Non-Patent Citations (1)

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