EP1842464B1 - Device for gathering a gathered curtain with individual cords - Google Patents

Description

The invention relates to a gatherable curtain with Einzelzugschnüren, which are attached to the lower edge of the curtain, and are fixed at the upper edge of the curtain in a clamping device on a winding shaft to be mounted by means of an operating device on the winding shaft, according to the preamble of claim 1 ,

Roman blinds of this type have long been known. In the DE 89 07 957 U A describes a Venetian blind in which a winding drum with lateral flanges is provided for each Einzelzugschnur, and the Einzelzugschnur is mounted in a radial slot of a flange. The installation of this Raffvorhangs is very expensive. In addition, the distances of the Einzelzugschnüre must always be the same. This requires that only a curtain with predetermined intervals of the drawstrings can be raised.

From the EP 0 355 244 A1 a device for shirring a curtain with Einzelzugschnüren is known. This known device has a rotary shaft and connected to the rotary shaft driver, which are rotatably connected to the rotary shaft. The drivers are displaceable on the rotary shaft in the axial direction, wherein this displacement is effected by an interaction of an external thread provided on the driver with an internal thread provided in a stationary clamp.

From the US 5,813,447 A a device for shirring a curtain is known in which pull cords are wound on a rotary shaft and in which the rotary shaft when winding in the axial direction is moved.

From the DE 89 07 957 U a Roman blind is known, in which on a rotating shaft with the rotary shaft fixedly connected winding drums are provided. When turning the winding shaft with the winding drums, the pull cords are wound onto the winding drums.

In another document, the DE 202 21 426 U1 , A Venetian blind is disclosed in which the Einzelzugschnüre individually in retaining elements, in which the pull cords are attached, are inserted in an undercut groove in the winding shaft and held in a form-fitting. The installation of this curtain is also very complicated. In addition, the holding elements must be positioned exactly in the middle of the Einzelzugschnüren so that the curtain is shirred evenly. Under load, ie when the curtain is gathered, the holding elements tilt and can then no longer center. Namely, the retaining elements are not exactly positioned on the Einzelzugschnüren, the Einzelzugschnüre seemingly different lengths, ie some Einzelzugschnüre are further removed from the intake channel of Einzelzugschnüre and the curtain is unevenly gathered.

The solutions have in common that the drawstrings uneven, even superimposed, are raised.

It is therefore the object of the present invention to propose a gatherable curtain whose Einzelzugschnüre can be gathered evenly.

The object is solved by the features of claim 1.

In this solution, the drivers are moved relative to the position of Einzelzugschnüre in the curtain, so that the Einzelzugschnüre can be stored side by side on the winding shaft or a coil.

According to the solution of the problem winding shaft and driver are coupled together via a geometry so that the drivers are axially freely movable but rotationally arranged on the winding shaft. In the simplest case, this geometry may consist of a longitudinal groove being present in the winding shaft in which the drivers run. The drivers can then self-align axially after the pull cords are fastened, i. they can align themselves with the position of the single drawstrings in the curtain, so that no forces act on the driver more. When shirring the curtain then the drivers are constantly re-centered at the last turn of Einzelzugschnüre so that they move axially on the winding shaft and so put the turns right next to each other. As a result, no forces will be transmitted to the curtain, so that it is cleanly gathered.

The task can thus be solved by the carriers are moved axially on the winding shaft. In any case, this solution ensures that the turns are deposited next to each other on the winding shaft or on the bobbin when the curtain is shirred. The effect of the axial displacement of the driver can be improved if the sliding surfaces of the geometry with a lubricious Coating are provided or when the sliding surfaces run between the winding shaft and driver in ball cages.

According to the invention, the drivers represent driver disks, wherein the driver disks have a mounting opening for receiving and holding the single pull cord at the outer region, and an extension tapering radially outward, opposite to the mounting opening, on which the individual puller cord glides onto the winding shaft when the curtain is shirred. At the top of the curtain, a fixing part is present at each Einzelzugschnur which is fixable in the mounting hole, and for each Einzelzugschnur at the top of the curtain a Einnähöse is present through which the Einzelzugschnur threaded and fixable with the fixing.

The fixing member according to the invention consists of a thickening for hanging in the mounting hole and a fitting element for fixing in the clamping geometry of the drive plate or the Einnähöse. It has proven to be advantageous that the mounting openings of the drive plates are in Entrafften curtain against the Einnähösen. The fitting element has e.g. Small elevations, with which it can be clicked into the mounting hole or the eyelet. The fitting element can also have a different fit, such as a triangular or the like. When removing the curtain, the fixing element is clicked into the Einnähöse. The curtain then remains disarmed while cleaning.

The drivers can also represent coils with a cheek, wherein the coils are arranged on the winding shaft, that the cheeks are each on the side facing the direction of movement of the winding shaft and the coil when shirring the curtain, and the Clamping devices in the cheeks is then designed so that the Einzelzugschnüre be placed on the bobbin.

To assemble the Raffvorhangs with individual cords, the curtain is first in a de-aired state in a known manner to the curtain bar, which is provided with a Velcro fastened. Then the Einzelzugschnüre, which are provided at the upper ends with a clamping device, inserted into the mounting holes of the driver and fixed. The drivers are coupled together via a suitable geometry and axially displaceable on the winding shaft. When the carriers on the winding shaft are axially movable, the carriers center themselves. When the curtain is shirred, the carriers slide with the turns in such a way that the individual pull cords always run onto the winding shaft or bobbin at the same point. If axially movable carriers are used axially on the winding shaft, a moving winding shaft can be dispensed with, since the carriers then independently align themselves with the individual pulling cords.

The decisive advantage of the present invention is that curtains with Einzelzugschnüre can be gathered evenly in each case. The existing with each revolution of the winding shaft feed the driver guarantees a winding of the drawstrings in adjacent turns. Even unfavorable influences on the curtain, such as drafts of an open window or an object standing on the window sill, on which the curtain runs during the release, has no effect on the function of the Roman shade.

• Fig. 1A zeigt eine Vorrichtung zum Raffen eines Vorhangs mit Einzelzugschnüren, wenn der Vorhang entrafft ist;
• Fig. 1B zeigt ein Detail von Fig. 1A;
• Fig. 2A zeigt eine Vorrichtung zum Raffen eines Vorhangs mit Einzelzugschnüren, wenn der Vorhang gerafft ist;
• Fig. 2B zeigt ein Detail von Fig. 2A;
• Fig. 3A bis 3C zeigt die Lage der Wickelwelle vor und nach dem Raffen des Vorhangs;
• Fig. 4 zeigt eine Mitnehmerscheibe mit Einzelzugschnur in der Montageöffnung der Mitnehmerscheibe in schematischer Darstellung;
• Fig. 5A bis 5B zeigen die Mitnehmerscheibe in zwei Ansichten;
• Fig. 5C zeigt eine Mitnehmerscheibe mit Einzelzugschnur in der Montageöffnung der Mitnehmerscheibe;
• Fig. 6A und 6B zeigen das Fixierteil in zwei Ansichten;
• Fig. 7A und 7B zeigen die Einnähöse in zwei Ansichten;
• Fig. 8 zeigt eine Wickelwelle mit einer Mitnehmerscheibe mit einer Montageöffnung entsprechend der vorliegenden Erfindung;
• Fig. 9 zeigt die Wickelwelle mit der Mitnehmerscheibe, wobei eine radial nach außen verjüngte Erweiterung erkennbar ist;
• Fig. 10A bis 10C zeigt einen spulenförmigen Mitnehmer;
• Fig. 11A und 11B zeigt eine weitere Ausführungsform des Mitnehmers; und
• Fig. 12 zeigt eine noch andere Ausführungsform des Mitnehmers.

The invention will be explained below with reference to drawings of exemplary embodiments in the individual drawings, like reference numerals designate the same or similar parts.

• Fig. 1A shows a device for gathering a curtain with Einzelzugschnüren when the curtain is entraffed;
• Fig. 1B shows a detail of Fig. 1A ;
• Fig. 2A shows a device for gathering a curtain with Einzelzugschnüren when the curtain is gathered;
• Fig. 2B shows a detail of Fig. 2A ;
• Figs. 3A to 3C shows the position of the winding shaft before and after the shirring of the curtain;
• Fig. 4 shows a drive plate with Einzelzugschnur in the mounting hole of the drive plate in a schematic representation;
• FIGS. 5A to 5B show the drive plate in two views;
• Fig. 5C shows a drive plate with Einzelzugschnur in the mounting hole of the drive plate;
• FIGS. 6A and 6B show the fixing part in two views;
• Figs. 7A and 7B show the attachment in two views;
• Fig. 8 shows a winding shaft with a drive plate with a mounting opening according to the present invention;
• Fig. 9 shows the winding shaft with the drive plate, wherein a radially outwardly tapered extension can be seen;
• 10A to 10C shows a coil-shaped driver;
• Figs. 11A and 11B shows a further embodiment of the driver; and
• Fig. 12 shows a still other embodiment of the driver.

In Fig. 1A a winding shaft 1 according to the present invention is shown. On the right side in the drawing, the operating device 3 is shown with the operating chain. On the winding shaft 1 is a driver 5 with a mounting opening for the fixing part 7, which is located on the Einzelzugschnur 6. The Einzelzugschnur 6 is guided in this embodiment by a Velcro 4, which is located on the curtain. For clarity, the curtain, which is attached to the curtain rail 2, not shown. The curtain would be disenchanted in this presentation. The winding shaft 1 is in the end position on the operating device 3 (right in the drawing). In Fig. 1 B the driver 5 of the arrangement is shown enlarged.

In Fig. 2A a winding shaft 1 is shown in the shirred state of the curtain. On the right side in the drawing, the operating device 3 is shown with the operating chain. On the winding shaft 1 is a driver 5 with a mounting opening for the fixing part 7, which is located on the Einzelzugschnur 6. The Einzelzugschnur 6 is guided in this embodiment by a Velcro 4, which is located on the curtain. On the winding shaft 1 are adjacent turns of Single pull cord 6 recognizable. The driver 5, which was located in the de-tightened state of the curtain opposite the Velcro 4, is moved on the winding shaft 1 to the left in the drawing. The incoming of the Velcro 4 Einzelzugschnur 6 can be pulled up successively in adjacent turns on the winding shaft 1. On the right side in the drawing, the guide pin 8 can be seen. In Fig. 2B the driver 5 of the arrangement is shown enlarged.

In the FIGS. 3A to 3C the position of the winding shaft 1 is displayed in the entrafftened and shirred state of the curtain. In this embodiment, the winding shaft 1 is arranged with the driver 5 (not shown) in a housing 9 to a closed system. Fig. 3A shows the winding shaft 1 in the de-tightened state of the curtain. On the left side in the drawing, the threaded rod 10 is recognizable. Fig. 3B shows the position of the winding shaft 1 in the shirred state of the curtain. On the right side in the drawing, the guide pin 8 can be seen. During the shirring process, the winding shaft 1 has moved to the left in the drawing. Fig. 3C shows a part A of Fig. 3A increased. It shows the position of the winding shaft 1 in the de-tightened state of the curtain.

In Fig. 4 the mounting opening 16 is shown on the drive plate 5 with the fixing part 7 contained therein on the Einzelzugschnur 6 with the thickening 15. The fitting element 19 is clicked into the mounting opening 16.

In Figs. 5A to 5C the drive plate 5 is shown in three views. The drive plate 5 is provided on the inside with runners 17, with which the drive plate 5 easily slidably inserted in the longitudinal grooves 14 of the winding shaft 1. The mounting opening 16 serves to receive the fixing part 7 and the opposite to the mounting hole 16 existing radially outwardly tapered Extension 18 serves to let the Einzelzugschnüre 6 when shirring the curtain to slide on the winding shaft 1.

FIGS. 6A and 6B show the fixing element. The Einzelzugschnur 6 is threaded through the opening 22. The thickening 15 is then at the outer end of the Einzelzugschnur 6, which is hooked into the mounting hole 16. With the fitting element 19, which has three nubs 20 in this embodiment, the fixing part is fixed either in the mounting opening 16, when shirring the curtain, or in the Einnähöse 21, when removing and cleaning the curtain. In Fig. 5C it can be seen that the fitting element 19 is clicked into the mounting opening 16.

Figs. 7A and 7B show the Einnähöse 21 in two views. The Einnähöse 21 consists of a plate which is sewn to the upper edge of the curtain and a vertical opening 22 through which the Einzelzugschnur 6 is threaded and provided with the fixing part. After mounting the fixing part, the Einzelzugschnur 6, as in the Fig. 7B shown, are fixed with the fitting element 19 in the opening 22.

The fitting element is provided with nubs 20 in this embodiment. It is possible through to choose other fits that ensure a secure fit in the Einnähöse 21 and the mounting hole 16.

In Fig. 8 a winding shaft 1 with a drive plate 5 according to the present invention is shown in a perspective view. The winding shaft 1 has in this embodiment, two longitudinal grooves 14 in which the drive plate 5 with two skids 17, which are provided on the inner portion of the drive plate 5, are rotationally but easily slidably mounted in the longitudinal direction 5. For the function, it is important that everyone Mounting openings 16 are aligned in one direction on the winding shaft 1. In the mounting opening 16 of the drive plate 5, the pull cord 6 is held and fixed. A radially outwardly tapered extension 18 relative to the mounting opening 16 on the drive plate 5 is in Fig. 9 recognizable. At this extension 18, the pull cord 6 slides when shirring the curtain on the winding shaft 1. At the top of the curtain is at each Einzelzugschnur 6 a fixing part 7 is present. The fixing part 7 consists of a thickening 15 which is held in the mounting opening 16 and a fitting element 19 which is fixable in the mounting opening 16. For each Einzelzugschnur 6 a Einnähöse 21 is present at the top of the curtain, threaded through the opening 22, the Einzelzugschnur 6 and with the fitting element 19 of the fixing part 7 when the curtain is removed from the shirring device, is fixed in the Einnähöse 21.

The shirring device is advantageously set so that all the mounting opening 16 are completely deadlocked curtain with respect to the fixing parts 7.

Fig. 9 shows the drive plate 5 on the winding shaft 1 with the radially outwardly tapered extension 18. This radially outwardly tapered extension 18 serves the Einzelzugschnur 6, which is initially drawn by the central position of the drive plate 5 on this, to the winding shaft 1 to lead.

10A to 10C shows driver 5, which are formed as coils. Each of these drivers 5 is mounted in two longitudinal grooves 14 in the winding shaft 1 and smoothly in the axial direction on the winding shaft 1 slidably. By this storage, the driver 5 can center after mounting the curtain and the Einzelzugschnüre 6 in the driver 5 itself. That is, the driver 5 is then exactly above the Einzelzugschnur 6 in the curtain. The curtain is not burdened by the side. In addition, this creates the opportunity to mount curtains with different distances of the Einzelzugschnüre 6 to one and the same device.

Figs. 11A and 11B show another, not belonging to the invention embodiment of the driver 5. The trained as a coil carrier 5 has a spiral channel 11, in which the Einzelzugschnüre 6 are retracted when shirring the curtain. The Einzelzugschnüre 6 are in this embodiment of a ring 12, which is located below the loop tape on the curtain and thus provides a certain amount of leeway for the Einzelzugschnur 6, led into the mounting hole 16 of the cheek of the coil. In this embodiment, the winding shaft 1 does not necessarily have to be displaced at each revolution of the shirring operation. Since this coil is axially slightly displaceable on the winding shaft 1, the driver 5 can constantly center, so that the Einzelzugschnüre 6 are always wound side by side.

Fig. 12 shows the same structure as the embodiment in Fig. 11 However, in this embodiment, a guide pin 13 is fixedly disposed in the housing 9 or on the curtain strip. By this guide pin 13 of the driver 5 receives a forced operation, so that even with unfavorable influences, if, for example, the driver 5 canted in the longitudinal grooves 14, a reliable shirring the curtain with juxtaposed windings of Einzelzugschnüren 6 is possible

reference numeral

1. 1st winding shaft
2. 2nd curtain rail
3. 3. Operating device
4. 4. eyelet
5. 5. driver
6. 6. Single pull cord
7. 7. Fixing part
8. 8. Guide pin
9. 9. Housing
10. 10. Threaded rod
11. 11. Spiral channel
12. 12th ring
13. 13. Guide pin
14. 14th longitudinal groove
15. 15. Thickening
16. 16. Mounting opening
17. 17th skid
18. 18. Radially outwardly tapered extension
19. 19. Pass element
20. 20. pimples
21. 21. Connect

Claims (7)

1. Gatherable curtain with entrainers (5), clamping devices, a winding shaft (1), a control device (3) and individual pull cords (6), which are fastened to the lower edge of the curtain and fixed at the upper edge of the curtain in one of the clamping devices at a respective entrainer coupled with the winding shaft (1) in order to be pulled up onto the winding shaft by means of the control device (3), wherein the winding shaft (1) and the entrainers (5) have a geometry with slide surfaces by which theentrainers (5) are arranged on the winding shaft (1) to be secure against relative rotation, but axially freely movable, characterised in that the entrainers (5) represent entrainer discs, that each entrainer disc has at the outer region a mounting opening (16) for receiving and mounting the individual pull cord (6) and oppositely to the mounting opening (16) a radially outwardly tapering enlargement (18) at which the individual pull cord (6) slides during gathering of the curtain on the winding shaft (1), that a fixing part (7), which is fixable in the mounting opening (16), is present at the upper edge of the curtain at each individual pull cord (6) and that an eye (4), through which the individual pull cord (6) is introduced and is fixable with the fixing part (7), is present for each individual pull cord (6) at the upper edge of the curtain.
2. Gatherable curtain according to claim 1, characterised in that the slide surfaces are provided with a slide-promoting coating.
3. Gatherable curtain according to claim 1, characterised in that ball cages are present between the slide surfaces.
4. Gatherable curtain according to any one of claims 1 to 3, characterised in that the winding shaft (1) has at least one longitudinal groove (14) in which the entrainers (5) are axially freely movable.
5. Gatherable curtain according to any one of the preceding claims, characterised in that the fixing part (7) consists of a thickening (15) for suspension in the mounting opening (16) and a fit element (19) for fixing in the clamping geometry of the entrainer disc or the eye (4).
6. Gatherable curtain according to claim 5, characterised in that the fit elements (19) have small nubs (20) by which they can be selectably notched into the mounting opening (16) or the eye (4).
7. Gatherable curtain according to any one of the preceding claims, characterised in that the mounting openings (16) of the entrainer discs are opposite the eyes (4) at the curtain when the curtain is fully extended.

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