WO2020083818A1

WO2020083818A1 - Roller blind assembly with draw hoop for roller blind web

Info

Publication number: WO2020083818A1
Application number: PCT/EP2019/078525
Authority: WO
Inventors: Jürgen Stenvers; Richard SIRTL
Original assignee: Webasto SE
Priority date: 2018-10-25
Filing date: 2019-10-21
Publication date: 2020-04-30
Also published as: CN112888588A; DE102018126601A1

Abstract

The invention relates to a roller blind assembly for a motor vehicle, comprising a roller blind web (16) which can be wound into a roller blind coil (18) and which is connected to a draw hoop (20, 20') at the roller blind web edge facing away from the roller blind coil (18), said draw hoop being provided with a respective slider element (28, 42A, 42B) on both sides with respect to the longitudinal central plane of the roller blind, wherein the slider element is guided in a respective guide rail (22A, 22B). The two slider elements (28, 42A, 42B) are held in the guide rails (22A, 22B) under tension with respect to the rotational direction opposite the axis extending in the transverse direction of the roller blind.

Description

Roller blind arrangement with pull bow for roller blinds

The invention relates to a roller blind arrangement for a motor vehicle with the features of the preamble of patent claim 1.

Such a roller blind arrangement is known from practice and comprises a roller blind web which can be unwound from a roller blind winding, which can be formed on a winding shaft, for shading a transparent roof section of the motor vehicle in question, or which can be wound up to the roller blind winding to release the transparent roof section is. The roller blind web is provided on its edge facing away from the roller blind winder with a tension bow which serves to adjust the roller blind web and is provided at its ends with a slide element which is guided in a roof-mounted guide rail. The two guide rails are arranged to the side of the transparent roof section and extend parallel to the pull-out direction of the roller blind. The slide elements of the tension bow are each connected to a drive cable which is driven by a drive motor. The slider elements thus represent roller blind couplings via which the roller blind is coupled to the drive motor. The gliding elements, which are each guided in a guideway of the guideway in question, can in particular in rough road conditions, i. H. if there is a hard excitation profile, vibrate in the guideway due to tolerances, which can lead to rattling noises. This is not desirable.

The invention has for its object to provide a roller blind arrangement designed according to the type mentioned in the introduction, in which rattling of the sliding elements in the guide rails is at least largely prevented. This object is achieved by the roller blind arrangement with the features of claim 1.

According to the invention, therefore, a roller blind arrangement for a motor vehicle is proposed which has a roller blind web with a pull bow, which is guided on both sides in each case via a slide element in a guide rail. The slider elements are clamped in the guide rails in particular by means of a corresponding spring means with an opposite direction of rotation. Due to the sliding elements guided under tension in the guide rails, the forces required for moving the tension bow increase insignificantly compared to a system of the conventional type described above. Wear due to abrasion of the slider elements can also be compensated for by the preload. The pretension causes an automatic readjustment of the slider elements. A constant and permanent rattling ability in the area of the slide elements guided in the guide rails can thus be achieved over the life of the roller blind arrangement according to the invention. In an advantageous embodiment of the roller blind arrangement according to the invention, the tension bow is made of a metallic material and is thus designed as a spring element or spring means that holds the two slide elements under tension in the opposite direction of rotation about the axis extending in the roller blind direction in the guide rails. The tension bow, the material of which has resilient properties, is used to apply the pretension to the slider elements or to store these in a spring-loaded manner. There are therefore no additional components required compared to the known system described in the introduction.

In particular when using a metallic material for the pull bow, the operational safety of the roller blind arrangement can be guaranteed over a wide temperature range. Steel or aluminum, for example, is used as the material for the pull bow. The tension bow can then be designed as a roll bending profile or as an extruded profile.

In an expedient embodiment of the roller blind arrangement according to the invention, the slide elements, which are in particular designed as one-piece injection molded parts, each have a pin which is guided by a slide body in the direction of the roller blind longitudinal protrudes mid-plane and is inserted into a recess of the tension bow. The recess of the tension mirror is expediently formed by a cavity of the tension mirror, which is preferably designed as a hollow profile, which is continuous in the longitudinal direction of the tension bow. The slider body has sliding surfaces over which the slider element is guided in the guide rail in question.

In a special embodiment of the roller blind arrangement according to the invention, the tension on the slider elements is generated in that the tension bow is twisted in relation to a longitudinal axis of the tension bow. Due to the rotation or torsion, the slider elements are guided in opposite directions in the two guide rails. The pull bow exerts an opposing spring force on the slider elements, which is caused by the torsion.

In a further embodiment of the roller blind arrangement according to the invention, the pins of the slider elements engage in a non-rotatable manner in a profile cavity of the tension bow forming the recess in such a way that the slider bodies are rotated relative to one another when viewed in the blind transverse direction.

The pins of the slider elements are aligned with one another in a special embodiment of the roller blind arrangement according to the invention, whereas the slider bodies are rotated relative to one another. The twisting of the slider bodies of the two slider elements relative to one another is thus not realized by the tension bow, which can be designed as a straight profile, but by the slider elements themselves.

In many applications, the slider bodies are already effectively clamped in the guide rails when they are rotated by about 2 degrees to 8 degrees, in particular by about 6 degrees, in relation to the roller blind direction. The adjustment forces required to move the tension bow in the guide rails are within an acceptable range for this range of values both with a manual drive and with a motor drive. Depending on the application, it is also conceivable that the sliding bodies are rotated at a larger angle to one another.

A special embodiment of the roller blind arrangement according to the invention is a side-guided roller blind, ie the roller blind web is provided with lateral guide provided tapes, which are each connected to one of the slider elements and each guided in a guide rail. The lateral guide bands can be directly connected to the fabric or the material of the roller blind. For example, the guide belts are integrated in so-called textile modules, which form the lateral edge areas of the blind sheet, which are connected to a central area forming the visible areas of the blind sheet and which are optimized in terms of the friction behavior to the material of the guide rails.

The slider elements can each be driven by a drive cable that can be actuated by a drive motor. The drive cables can be permanently connected to the sliding elements. In this case, the slide elements are actively driven and are driven by the drive cables both when unwinding and when winding up the roller blind web. Alternatively, the slider elements can also be passively driven clutches that are moved from the ends of the drive cable to unwind the roller blind web from the roller blind winder. When the drive cables are driven in opposite directions, the roller blind web automatically winds up to the roller blind winding by means of at least one winding spring. The tension bow is pulled by the clock spring. A clock spring can be integrated in a winding shaft. In the form of roller springs, winding springs can also be integrated on the side edges of the roller blind. The roller blind arrangement according to the invention can also be a manually operable roller blind, in which the roller blind web is wound up or unwound by manual actuation of the pull bow.

Further advantages and advantageous refinements of the subject matter of the invention can be found in the description, the drawing and the patent claims. Two exemplary embodiments of a roller blind arrangement according to the invention are shown schematically simplified in the drawing and are explained in more detail in the following description. It shows:

Figure 1 is a schematic plan view of a vehicle roof with a blind arrangement according to the invention; Figure 2 is a perspective view of a front end portion of the shade assembly;

FIG. 3 shows the arrangement of a slider element of a tension bow of the roller blind arrangement in a guide rail;

FIG. 4 the pull bow without slider elements;

Figure 5 is a perspective view of an alternative embodiment of a

Zugspiegel with slide elements;

Figure 6 is a perspective view of a slider element of the tension bow according to

Figure 5;

Figure 7 shows a second perspective view of the slider element;

Figure 8a is a front view of the slider element according to Figures 6 and 7; and FIG. 8b shows an end view of a sliding element according to the prior art.

FIG. 1 shows a vehicle roof 10 of a passenger car which is otherwise not shown in detail and which has a roof cutout 12 which can be closed or at least partially closed by means of a transparent cover element (not shown here).

In order to be able to reduce or prevent the incidence of light through the roof cutout 12, the vehicle roof 10 has a roller blind arrangement 14 which, as a shading element, comprises a roller blind web 16 made of a foldable or windable, opaque or partially translucent material. In the area of a rear edge of the roof cutout 12, the blind sheet 16 can be wound up to form a blind roll 18. At its edge facing away from the roller blind winding 18, the roller blind web 16 is provided with a tension bow 20, which represents an actuating element of the roller blind arrangement 14 and is described in more detail with reference to FIGS. 2 to 4. The ends of the pull bow 20, which extends in the transverse direction of the roof, are guided in each case via a slider element 28 in a guide rail 22A or 22B. The two slider elements 28 are each connected to a drive cable 24A or 24B, which of a common drive motor 26 is driven. The slider elements 28 of the bow 20 are thus blind clutches.

The roller blind arrangement 14 represents a side-guided roller blind, the roller blind web 16 of which has a guide band on each of its lateral edges, which is guided in the relevant guide rail 22A or 22B. The guide tapes are each designed as a roller spring, so that the roller blind web 16 automatically winds up outside the guide rails 22A and 22B to form the roller blind roll 18.

As already mentioned above, the tension bow 20, which consists of a steel profile that is produced by a roll bending process, is provided with a slider element 28 at both ends. The slider elements 28, which are designed as plastic injection molded parts, each comprise a slider body 30 which serves to connect the relevant drive cable 24A or 24B and which is guided via a guide tab 32 in a guide track 34 of the relevant guide rail 22A or 22B. A profile pin 36 protrudes from the slider body 30 in the direction of a vertical longitudinal center plane of the roller, which engages in a recess 38 of the tension bow 20 formed by the profile cavity. The two slider elements 28 are mirror-symmetrical to one another.

As can be seen from an overview of FIGS. 3 and 4, the bow profile forming the tensile bow 20 is twisted, i. H. it is twisted in itself about the longitudinal axis of the tension bow, so that the end faces arranged on both sides are twisted by about 6 degrees to one another. As a result, the slider elements 28 or their slider bodies 30, which are arranged on both sides, are rotated by about 6 degrees with respect to one another, as viewed in the roller blind direction, so that they are tilted in the guideways 34 and felt under tension, the tension bow 20 forming a spring element which slides the slider body 30 Slider elements 28 clamped in the guide rails. This will eventually

Rattling noises, which could arise especially in poor road conditions, effectively counteracted.

FIGS. 5 to 8 show an alternative embodiment of a tension bow 20 ′ with lateral slider elements 42A and 42B, which are guided in guide rails of a roller blind arrangement in the manner of the slider elements described above apart from the pull bow 20 'with its slider elements 42A and 42B corresponds to the roller blind arrangement according to FIGS. 1 to 4 and differs from it in that the pull bow 20' is straight in itself, ie has no torsion. However, the profile pins 36, which protrude from the slider bodies 30 in the direction of the longitudinal center plane of the roller and engage in the profile cavity of the tension bow 20 ′, are formed on the slider bodies 30 such that they are rotated by 6 degrees with respect to one another in the two guide rails 22A and 22B. The slider elements 42A and 42B are therefore not designed to be mirror-symmetrical to one another, but instead have profile pins which are rotated in opposite directions to one another on slider bodies which are embodied in mirror-symmetrical manner with respect to one another.

Due to the opposite rotation of the two profile pins 36 on the slide body 30, the latter are rotated in opposite directions to one another and guided under tension in the guide rails 22A and 22B. The pull bow 20 'made of a metallic material, such as aluminum or steel, serves as a spring element, whereby rattling or jamming of the slider elements 28 in the guide rails 22A and 22B can be prevented.

Otherwise, the roller blind arrangement with the pull bow 20 ′ corresponds to the roller blind arrangement described in connection with FIGS. 1 to 4.

The rotation of the profile pins 36 with respect to the slide plane defined by the respective slide body 30 by 3 degrees in each case can be seen in particular from FIG. 8a. On the other hand, in the comparative example shown in FIG. 8b, which corresponds to the prior art, the profile pin 36S is not rotated with respect to the sliding plane formed by the sliding body 3 OS. This means that the two 3 OS sliding bodies, when viewed in the transverse direction of the roof, feel flush with one another in the guide rails arranged on both sides. Reference list

10 vehicle roof

12 roof cutout

14 Roller blind arrangement

16 roller blind

18 roller blinds

20, 20 'collision

22A, B guide rail

24A, B drive cable

26 drive motor

28 sliding element

30 slider body

32 guide tab

34 guideway

36 profile pins

38 recess

42A, B slider element

Claims

1. Roller blind arrangement for a motor vehicle, comprising a roller blind web (16) which can be wound up to form a roller blind winder (18) and is connected at its edge facing away from the roller blind winder (18) to a tension bow (20, 20 ') which is related to a

The longitudinal center plane of the roller blind is provided on both sides with a slider element (28, 42A, 42B) which is guided in a respective guide rail (22 A, 22B), characterized in that the two slider elements (28, 42A, 42B) relate to one in the roller blind direction extending axis with opposite direction of rotation in the guide rails (22A, 22B) are held under tension.

2. Roller blind arrangement according to claim 1, characterized in that the tension bow (20, 20 ') is made of a metallic material and serves as a spring element which the two slide elements (28, 42A, 42B) with opposite direction of rotation in the guide rails (22A, 22B) keeps it energized.

3. Roller blind arrangement according to claim 1 or 2, characterized in that the slide elements (28, 42A, 42B) each have a pin (36) which protrudes from a slide body (30) in the direction of the vertical longitudinal roller means and which in one Recess (38) of the tension bow (20, 20 ') is inserted.

4. Roller blind arrangement according to claim 3, characterized in that the pins (36) in a recess (38) forming the profile cavity of the tension bow (20, 20 ') engage in such a way that the slide bodies (30) are rotated relative to each other when viewed in the roller blind direction.

5. Roller blind arrangement according to claim 3 or 4, characterized in that the tension bow (20) is twisted in relation to a tension bow longitudinal axis.

6. Roller blind arrangement according to one of claims 3 to 5, characterized in that the pins (36), viewed in the roller blind cross direction, are aligned with one another and the slider bodies (30) are rotated relative to one another.

7. Roller blind arrangement according to one of claims 3 to 6, characterized in that the slider body (30), viewed in the roller blind transverse direction, are rotated relative to one another in particular by approximately 2 degrees to 8 degrees.

8. Roller blind arrangement according to one of claims 1 to 7, characterized in that the roller blind web (16) is provided with lateral guide bands which are each connected to one of the slider elements (28, 42A, 42B).

9. Roller blind arrangement according to one of claims 1 to 8, characterized in that the slider elements (28, 42A, 42B) are each driven by a drive cable (24A, 24B) which can be actuated by a drive motor.