DE20109239U1 - Roman blind with winding elements attached to a shaft - Google Patents

Description

Roman blind with winding elements attached to a shaft

The invention relates to a Roman blind with the features specified in the preamble of claim 1.

Roman blinds, which are often also referred to as Roman roller blinds, are already well known. They have a foldable fabric panel which forms a substantially smooth vertical surface when fully lowered and is folded up and locked in the upper part of the Roman blind when raised. The fabric panel is raised or lowered using a chain or cord attached to the side of the curtain or by means of an electric motor. A weighting profile, such as a metal rod, is usually inserted into the fabric panel in the lower part. In many cases, the fabric panel is attached to a profile rail using a Velcro connection.

Furthermore, it is already known to use curtain loop tapes, deflection eyelets or pull-through rings to guide the drawstrings of a Roman curtain.

Furthermore, various types of drives for winding shafts and rotary axes with winding spools are already known. In this case, several pull cords or bands roll up or down to raise or lower the fabric. Examples of such Roman blinds are described in DE-Al-41 28 485, DE-Ul-92 07 916 and DE-Al-39 31 090. Roman blinds of this type allow the fabric to be raised and lowered precisely, but require a relatively high amount of time and specialist knowledge when removing and attaching them, for example in connection with cleaning the fabric. This is because the individual pull cords must always be

·

·

precisely aligned and often threaded into respective spools.

It is already known from DE-Cl-44 39 423 that the pull cords of the Roman blind can be wound up in a spiral shape directly onto a shaft when the fabric is pulled up. The individual pull cords are provided in a U-shape on the back of the fabric, with the middle part of each pull cord running on the top of the fabric between two guide rings and the ends of the two outer legs of the respective pull cord being attached to the lower part of the fabric. The pull cords are wound up by a hook-shaped driver on the shaft, which is positioned centrally between the guide rings of the respective pull cord and grips the pull cords when the shaft rotates. The number of U-shaped pull cords depends on the width of the fabric. When assembling or attaching the Roman blind, the pull cords must be individually adjusted and attached in terms of their height. This work often has to be carried out on ladders, which entails a relatively high risk of accidents.

From EP-Bl-O 541 901 a Roman blind is known in which the winding shaft is hollow and in the holes formed in the winding shaft there are arranged fastening inserts made of elastic material which fit closely, are held in place by a clamping and press fit and can be released if necessary and are connected to the ends of the pull cords.

EP-A2-0 834 275 discloses a Roman blind in which the winding shaft is mounted on a retaining bar which has a number of guides for the pull cords. The winding shaft carries at least one fastening ring which is pushed onto the latter and which is firmly or detachably connected to the winding shaft and which has a pull cord collector on its circumference for fastening the ends of the pull cords.

From DE-Al-198 12 339 a Roman blind is known which has a winding shaft and is arranged on a track of the Roman blind.

has designated guide and/or deflection elements for pull cords. The pull cords are attached to the lower end of the web itself and to the winding shaft at the upper end of the web. When the winding shaft rotates, the pull cords wind up or off the winding shaft, causing the web to raise or lower. The pull cords are wound on the winding shaft in such a way that when the Roman blind is fully lowered, at least one of the pull cords is partially wound up, while at least a second of the pull cords is fully unwound. This allows, for example, a fan-shaped gathering of the Roman blind.

The invention is based on the object of designing a Roman blind with the features specified in the preamble of claim 1 in such a way that secure pull cord grip is ensured.

This object is achieved by a Roman blind with the features specified in claim 1. Advantageous further developments and embodiments are specified in the dependent claims.

The advantages of the invention are in particular that the arrangement of the winding elements in the immediate vicinity of the deflection elements provided in the upper area of the curtain track and the use of these winding elements both for gripping and for winding up the pull cord ensure that the pull cord is both securely gripped and neatly wound up. It is also ensured that the curtain track is pulled upwards evenly.

The advantages of the features specified in claim 2 are in particular that by using only a single pull cord, which is completely loose or only attached at its ends and otherwise loosely guided through the guide and deflection elements, after the curtain track has been attached

Automatic height adjustment ensures that the curtain track does not hang crooked.

so that the

The design of the winding elements as coil segments, as specified in claims 5 to 7, further improves the gripping of the pull cord and its winding when the curtain panel is pulled up, as well as the unwinding of the pull cord when the curtain panel is lowered.

The features specified in claim 8 enable easy insertion of the coil segments into the shaft.

The designs of the Roman blind in the sense of claims 11 and 12 have the advantage that the two modules of the Roman blind can be easily separated from one another and reassembled without any other changes being necessary. This makes it easier, for example, to remove the curtain panel for cleaning purposes.

Further advantageous properties of the invention will become apparent from the exemplary explanation thereof based on the figures. It shows:

Figure 1 is a schematic view of the front side,

Figure 2 is a schematic representation of a Roman blind according to the invention,

Figure 3 is a schematic roman blind according to the invention,

Figure 4 is a schematic roman blind according to the invention,

Figure 5 is a schematic representation of a Roman blind according to the invention,

View of a Roman blind from

View of the first module of a first embodiment

View of both modules of the first embodiment

View of the first module of a second embodiment

View of both modules of a third embodiment

Figure β is a schematic view of the first module of a Roman blind according to a fourth embodiment

for the invention,
Figure 7 is a schematic view of both modules of a Roman blind according to a fifth embodiment

for the invention,
Figure 8 is a schematic view of both modules of a

Roman blind according to a sixth embodiment of the invention,
Figure 9 is a schematic view of both modules of a Roman blind according to a seventh embodiment

for the invention,
Figure 10 Examples of possible designs of the shaft and the winding elements applied to it,

Figure 11 is a side view and a partial view of the back of a Roman blind according to the invention,
Figure 12 is a schematic view of the first module of a Roman blind according to an eighth embodiment

for the invention, and
Figure 13 is a schematic view of both modules of a Roman blind according to the eighth embodiment of the invention.

Figure 1 shows a schematic view of a Roman blind from its front side. The Roman blind shown has a profiled fastening rail 38 to which a curtain panel 36 is attached by means of a Velcro connection. The curtain panel 36, which is preferably a fabric panel, has a weighting and stiffening profile 37 incorporated into the fabric panel in its lower region 45. The left edge of the fabric panel is provided with the reference number 48b and the right edge of the fabric panel is provided with the reference number 48a.

A Roman blind according to the invention preferably has two modules connected to one another by means of a Velcro connection, which can be detached from one another when the fabric panel is lowered to the lowest point. The first module has the curtain or fabric panel, deflection elements, pull cord guide elements and

• ft ····

a single pull cord. The second module contains the profiled fastening rail, bearing elements, a rotating shaft and winding elements connected to the shaft. This is explained below using several examples.

Figure 2 shows a schematic view of the first module of a Roman blind according to a first embodiment of the invention. The first module has a fabric panel 36, which is shown from the back in the figure. In the upper area of the fabric panel 36, a Velcro strip 39 is provided which runs horizontally across the entire width of the fabric panel and can be used to connect the fabric panel to a Velcro counterpart of the profiled fastening rail. Just below this Velcro strip 39, a total of four deflection eyelets 33 are attached to the fabric panel, which are distributed across the width of the fabric panel. These deflection eyelets are spaced from the fabric panel using a web directed perpendicularly to the fabric panel, so that the pull cord guided through the deflection eyelets can be securely grasped for the purpose of pulling up the fabric panel. From these deflection eyelets 33, pull cord guide elements 35 run vertically downwards, which in the embodiment shown are designed as curtain loop tapes. In the lower area of the fabric panel 36, just above the weighting stiffening profile 37, four pull-through rings 44 are attached to the fabric panel 36, wherein these pull-through rings are each provided at the lower end of a curtain loop tape.

A single drawstring 31 is guided through the curtain loop tapes 35, the deflection eyelets 33 and the pull-through rings 44. The beginning 46 of this drawstring is attached to the lower left pull-through ring 44 on the back of the fabric panel, forming a drawstring knot 43. From there, the drawstring 31 is guided vertically upwards through one of the curtain loop tapes and is deflected to the right in the area of the upper end of the fabric panel by means of a deflection eyelet 33. From there, the drawstring runs horizontally to the next deflection eyelet, in which the drawstring 31 is deflected downwards. From there, the drawstring 31 runs through another of the

Curtain loop tapes 35 back down to be diverted to the right in a pull-through ring AA . From this pull-through ring, the pull cord runs in the lower area of the fabric parallel to the weighting/stiffening profile 37 to the right as far as the next pull-through ring 44. In this, the pull cord 31 is diverted upwards, after which the pull cord is guided back up in another of the curtain loop tapes 35. There, in a deflection eyelet 33, the pull cord is again diverted in the horizontal direction and guided as far as the next deflection eyelet 33. In this, the pull cord 31 is diverted downwards again and runs in another curtain loop tape down to another pull-through ring 44. In this, the pull cord is diverted to the left and guided back to the first-mentioned pull-through ring 44 through the pull-through rings provided in the lower area of the fabric parallel to the weighting/stiffening profile. The end of the drawstring is attached to this by forming another drawstring knot.

In this embodiment, the beginning and the end of the pull cord 31 are knotted to the pull-through ring 44 shown in the bottom left of Figure 2. Otherwise, the pull cord 31 is guided loosely through all other pull-through rings 44, through the curtain loop bands 35 and through the deflection eyelets 33 without intermediate fixing. This simplifies the manufacture of Roman blinds, reduces manufacturing costs and avoids the need for height adjustment of pull cords when attaching the Roman blind or the first module to the second module.

Figure 3 shows a schematic view of both modules of a Roman blind according to the first embodiment of the invention, whereby the first module shown in Figure 2 is connected to the second module via its Velcro strip on the top of the Roman blind. This second module of the Roman blind shown has a profiled fastening rail 38, to the edges of which bearing elements 41, 42 are attached. A shaft 32 is rotatably mounted in or between these two bearing elements. The drive of the shaft 32 is in the bearing element

42 and is carried out by means of a manually operable chain which - as can be seen from Figure 3 - runs vertically downwards from the bearing element 42. Such a chain drive is also shown in the further embodiments described below. As an alternative to a chain drive, however, a drive can also be carried out by means of a cord or using an electric motor.

A total of four winding elements 30 are firmly connected to the shaft 32 and rotate when the shaft rotates. Each of the winding elements 30 has two half-shell coil segments that are arranged diametrically on the shaft 32, as will be explained below in connection with Figure 10. The half-shell coil segments each have a U-shaped section, the middle part of which runs at least essentially parallel to the shaft 32 and serves as a winding surface for the pull cord 31. This middle part can be straight or slightly curved. The two outer legs of the U-shaped section of the half-shell coil segments run perpendicular to the shaft 32 and are provided with a widened end region. This ensures that when the shaft rotates to pull up the fabric, the pull cord 31 is securely grasped by a half-shell coil segment and wound onto it in an orderly manner. To ensure this, each of the half-shell coil segments is provided directly below one of the deflection eyelets 33 provided in the upper area of the curtain panel. The aforementioned legs of the U-shaped section of the half-shell coil segments run directly to the left and right of a deflection eyelet when viewed horizontally. The length of the legs of the U-shaped section of the half-shell coil segments is selected such that their widened end areas end vertically above the pull cord, so that when the fabric panel is pulled up, the pull cord 31 is securely grasped by the legs of the U-shaped section of the half-shell coil segments in the immediate vicinity of the respective deflection eyelet.

Figure 4 shows a schematic view of the first module of a Roman blind according to a second embodiment of the invention. This differs from the module shown in Figure

2 in that a total of five vertically running curtain loop bands 35 are provided, which are arranged equidistant from one another. Consequently, in this embodiment, five deflection eyelets 33 are also provided in the upper area of the fabric web 36 and five pull-through rings 44 in the lower area of the fabric web 36. Furthermore, the drawstring course is chosen differently in this embodiment, as can be seen directly from Figure 4. Another difference from the first embodiment is that the beginning 46 and the end 47 of the drawstring 31 are not attached to a pull-through ring, but are knotted together to form a drawstring knot 43 in the lower area of the fabric web 36. In this embodiment,

The pull cord 31 is therefore guided completely loosely through the pull-through rings 44, the curtain loops 35 and the pull-out eyelets 33.

Figure 5 shows a schematic view of both modules of a Roman blind according to a third embodiment of the invention. This differs from the one shown in Figure

3 only in that the drawstring beginning 46 and the drawstring end 47 are fastened to different pull-through rings 44 in the lower region of the fabric panel 36, each forming a drawstring knot 43. The resulting drawstring path is immediately apparent from Figure 5.

Figure 6 shows a schematic view of the first module of a Roman blind according to a fourth embodiment of the invention. This differs from the first module shown in Figure 5 in that a total of six equidistantly arranged, vertically running curtain loop bands 35 are provided. Consequently, in this embodiment, six deflection eyelets 33 are provided in the upper area of the fabric web 36 and six pull-through rings 44 are provided in the lower area of the fabric web 36.

·

• · • ·

Figure 7 shows a schematic view of both modules of a Roman blind according to a fifth embodiment of the invention. In this embodiment, six vertically running curtain loop bands 35 arranged equidistant from one another, six deflection eyelets 33 in the upper area of the fabric 36 and six pull-through rings 44 in the lower area of the fabric 36 are provided. The beginning 46 of the drawstring and its end 47 are pre-knotted together to form a drawstring knot 43 on the left side in the lower area of the fabric. The drawstring path chosen in this embodiment is immediately apparent from Figure 7.

Figure 8 shows a schematic view of both modules of a Roman blind according to a sixth embodiment of the invention. This differs from the embodiment shown in Figure 5 only in that the drawstring beginning 46 and the drawstring end 47 are knotted together to form a drawstring knot 43 in the middle of the lower region of the fabric panel 36.

Figure 9 shows a schematic view of both modules of a Roman blind according to a seventh embodiment of the invention. In this embodiment, in contrast to the embodiment shown in Figure 7, the pull cord beginning 46 and the pull cord end 47 are knotted together in the middle of the lower region to form a pull cord knot 43.

Figure 10 shows examples of possible designs of the shaft 32 and the winding elements 30 applied to it. The shaft 32 itself can be round, square or octagonal, for example. The winding elements are preferably coil segments, the shape of which is selected so that the pull cord can be securely grasped by means of a coil segment and that the pull cord can also be wound up in an orderly manner on the coil segment.

II

In Figure 10a, two coil segments 30 are attached diametrically to the shaft 32, wherein the shaft has two grooves into which the coil segments are inserted.

According to Figure 10b, two coil segments 30 are attached diametrically to the shaft 32, whereby this attachment is achieved by plugging them on.

In Figure 10c, only one coil segment 30 is provided, which is plugged onto the shaft 32.

According to Figure 10d, the shaft 32 is square. Two coil segments 30 are placed diametrically on this square shaft.

In Figure 10e, the shaft 32 is octagonal in shape. Two coil segments 30 are placed diametrically on this octagonal shaft.

Figure 10f shows a longitudinal section through the shaft 32, which has two grooves N1, N2, into each of which a spool segment 30 is inserted. Each of the spool segments 30 has a U-shaped section, the middle part M of which runs at least substantially parallel to the shaft 32 and serves as a winding surface for the pull cord. The outer legs Sl and S2 of the U-shaped section of the spool segments 30 run perpendicular to the shaft 32 and are widened at their upper ends 01, 02, 03, 04 in order to be able to securely grasp the pull cord when the shaft is rotated to pull up the material web.

Figure 11 shows on the left _side a side view and on the right a partial view of the back of a Roman blind according to the invention. The side view shows in particular the Velcro connection 39 between the fabric panel 36 and the profiled fastening rail 38, one of the upper deflection eyelets 33, the shaft 32 with the spool segments 30 mounted therein, the pull cord 31, a pull-through ring 44 in the lower area of the fabric panel, the weighting element introduced into the fabric panel 36.

The stiffening profile 37 and the lower area 45 of the fabric panel 36 can be seen. In the corresponding partial view of the back of the Roman blind, the winding of the pull cord 31 onto the spool segments 30 is shown in more detail than in the previous examples. Furthermore, the knotting 43 of the beginning 46 with the end 47 of the pull cord 31 can be seen from this partial view.

Figure 12 shows a schematic view of the first module of a Roman blind according to an eighth embodiment of the invention. In this embodiment, four curtain loop bands 35, four deflection eyelets 33 are provided in the upper area of the fabric and four pull-through rings 44 are provided in the lower area of the fabric. The beginning 46 of the drawstring 31 is attached to the pull-through ring 44 shown in the bottom left of Figure 12, forming a drawstring knot 43, and the end 47 of the drawstring 31 is attached to the pull-through ring 44 shown in the bottom right of Figure 12, forming a drawstring knot 43. The complete course of the drawstring is immediately apparent from Figure 12.

Figure 13 shows a schematic view of both modules of a Roman blind according to the eighth embodiment of the invention.

A Roman blind according to the invention therefore has only a single pull cord. The ends of the pull cord are either knotted together so that the pull cord is loosely guided through the deflection and pull cord guide elements of the Roman blind. Alternatively, the beginning and end of the pull cord can also be attached directly to one of the deflection elements or the fabric panel, but otherwise the pull cord is loosely guided through the other deflection and pull cord guide elements. With a Roman blind according to the invention, no height adjustment is necessary after the pull cord has been pulled in. In order to ensure that the pull cord is securely grasped and wound up, winding elements, preferably designed as spool segments, are provided on a shaft.

These spool segments, mounted on a shaft, directly grip the upper deflection eyelets. This means that the pull cord is specifically caught when the shaft is rotated, so that when the spool segments first come into contact with the pull cord, this loosely drawn-in pull cord aligns itself lengthwise and automatically lifts the lower edge of the fabric evenly horizontally. The curtain is gathered.

The pull cord is pulled through the spool segments directly to the pull eyelets attached to the upper edge of the Roman blind system. This ensures that a slightly sagging pull cord is safely caught and wound up even in systems that are installed at an angle, for example in the case of sloping roofs or tilt windows.

The number of eyelets attached to the upper part of the curtain panel depends on the width of the curtain, the decorative ideas for the Roman blind and the quality of the fabric.

Since the pull cord is captured directly at the pulley eyes, an equal number of spool segment areas is necessary.

At least one associated coil segment is required. However, depending on the shape of the axis of rotation - round, square, hexagonal, rectangular or octagonal - it is possible to provide additional coil segments for the same deflection eyelet.

A Roman blind according to the invention has two modules which can be easily separated from each other when the curtain panel is completely lowered and can then also be easily reassembled.

In the above embodiments, only one pull cord is provided, which is grasped by means of the winding elements or coil segments. However, it is also possible to use winding elements or coil segments according to the invention in roman blinds in which several roman blind cords are provided.

which are guided over deflection elements in the upper part of the fabric and run horizontally over at least part of the width of the fabric.

The deflection elements provided in the upper area of the fabric preferably have a base plate that is as torsion-free as possible and a stable centering hole block that runs perpendicular to the base plate and is supported at the sides by webs. This allows the horizontal distance of the centering hole from the base plate to be adjusted to the respective associated spool segment, so that the pull cord can be precisely grasped by the spool segment and the pull cord can be precisely wound onto the spool segment.

Claims (16)

1. Roman blind, which has: - a profiled mounting rail to which bearing elements are attached, - a shaft rotatably mounted in the bearing elements, - a curtain track attached to the fastening rail, to which several deflection elements are attached in its upper area distributed over the width of the curtain track, to which pull cord guide elements are also provided vertically below the deflection elements and to which further deflection elements are attached in its lower area distributed over the width of the curtain track, characterized in that it further comprises winding elements ( 30 ) which are firmly connected to the shaft ( 32 ) and which are provided for engaging and winding up at least one pull cord ( 31 ) when the curtain web is pulled up, wherein each winding element ( 30 ) is provided directly below one of the deflection elements ( 33 ) provided in the upper region of the curtain web and grips the pull cord in the immediate vicinity of this deflection element. 2. Roman blind according to claim 1, characterized in that it further comprises: - a single continuous pull cord ( 31 ) which is guided through the deflection elements ( 33 , 44 ) and the pull cord guide elements ( 35 ) and whose end sections are either knotted together or are each fastened to one of the deflection elements ( 44 ) provided in the lower region of the curtain track or to the curtain track in the lower region of the curtain track. 3. Roman blind according to claim 1 or 2, characterized in that the deflection elements ( 33 , 44 ) are deflection eyelets and/or pull-through rings. 4. Roman blind according to one of claims 1 to 3, characterized in that the pull cord guide elements ( 35 ) are curtain loop bands which form a vertical guide track. 5. Roman blind according to one of the preceding claims, characterized in that the winding elements ( 30 ) each have two coil segments which are arranged diametrically on the shaft ( 32 ). 6. Roman blind according to claim 5, characterized in that the coil segments each have a U-shaped section, the middle part of which runs at least substantially parallel to the shaft ( 32 ) and is provided as a winding surface for the pull cord ( 31 ) and the outer legs of which run at least substantially perpendicular to the shaft and have a widened end region for engaging the pull cord. 7. Roman blind according to claim 6, characterized in that the pull cord is gripped by the outer legs of the coil segments directly next to the deflection elements ( 33 ) provided in the upper region of the curtain track. 8. Roman blind according to one of claims 4 to 7, characterized in that the coil segments are inserted into a groove running in the axial direction of the shaft. 9. Roman blind according to claim 8, characterized in that the coil segments ( 30 ) are each secured against slipping in the groove by means of a clamping or screw connection. 10. Roman blind according to one of the preceding claims, characterized in that the shaft ( 32 ) has a round, oval, rectangular, square, hexagonal or octagonal cross-section. 11. Roman blind according to one of the preceding claims, characterized in that it consists of two interconnected modules which can be detached from one another when the curtain track is lowered to the lowest point, the first module comprising the curtain track, the deflection elements, the pull cord guide elements and the pull cord and the second module comprising the profiled fastening rail, the bearing elements, the shaft and the winding elements connected to the shaft. 12. Roman blind according to claim 11, characterized in that the two modules are connected to each other via a Velcro connection. 13. Roman blind according to one of the preceding claims, characterized in that drive means are mounted in one of the bearing elements. 14. Roman blind according to claim 13, characterized in that the drive means comprise a chain, a cord or an electric motor. 15. Roman blind according to one of the preceding claims, characterized in that the deflection elements provided in the upper region of the fabric web have a base plate and a centering hole block running perpendicular to this. 16. Roman blind according to claim 15, characterized in that the centering hole block is supported by lateral webs.