WO2017063773A1

WO2017063773A1 - Roller blind arrangement having lateral guidance

Info

Publication number: WO2017063773A1
Application number: PCT/EP2016/068539
Authority: WO
Inventors: Andreas Rockelmann; Frank Müller; Arno Schönecker
Original assignee: Webasto SE
Priority date: 2015-10-14
Filing date: 2016-08-03
Publication date: 2017-04-20
Also published as: CN108349356B; CN108349356A; DE102015117478B3

Abstract

The invention relates to a roller blind arrangement for a motor vehicle for shading a transparent vehicle portion, comprising a roller blind web (16) which can be wound up on a winding shaft (20) to form a roller blind winding and is guided at its lateral edges with respect to a vertical roller blind longitudinal centre plane in one guide rail (22A, 22B) each, and a drive device with a drive pinion (26) which drives two driving means which are each guided in a guide track (30) of one of the guide rails (22A, 22B), wherein the driving means are each designed as a toothed belt (28A, 28B) which has a substantially rectangular cross section and has a toothing (32, 34) on at least one side. The roller blind web (16) is pressed between the lower side of the toothed belt (28A, 28B) and a base (42) of the guide track (30) and, as viewed in the transverse direction of the guide rail, is deflected at least in an approximately U-shaped manner in the guide track (30) by the toothed belt (28A, 28B) or is pressed between the upper side of the toothed belt (28A, 28B) and a top of the guide track (30) and, as viewed in the transverse direction of the guide rail, is deflected at least in an approximately upside-down U-shaped manner in the guide track (30) by the toothed belt (28A, 28B). The winding shaft (20) has an end region tapering conically towards the respective lateral edge of the roller blind web (16) on both sides of the vertical roller blind longitudinal centre plane.

Description

Roller blind arrangement with side guide

The invention relates to a roller blind arrangement for a motor vehicle for shading a transparent vehicle section according to the preamble of claim 1.

Such a roller blind arrangement is known from document DE 10 2006 054 881 A1 and comprises a roller blind which can be unwound from a winding device for shading a transparent roof section of the relevant motor vehicle or can be wound onto the winding device to release the transparent roof section. At an edge extending in the vehicle transverse direction, the roller blind is connected to the winding device designed in particular as a winding shaft. At their relative to a vertical vehicle longitudinal median plane arranged edges on both sides of the blind sheet guide bands, which are each guided in a extending in the vehicle longitudinal direction guide rail. Thus, the roller blind can be kept taut in the vehicle transverse direction. For actuation, the roller blind arrangement may have a drive motor which drives two drive means representing drive cable, which have a round cross-section and which are each guided in one of the guide rails to a pull bar, which is arranged on the side facing away from the winding device edge of the blind. The drive cable formed as a pitch cable at the same time form the lateral guide bands of the roller blind, and in fact by the fact that the roller blind is beaten when entering the guide rails by means of a complex device around the drive cable. The drive cables cling to the roller blind via a rough, brush-like surface, which is formed by a variety of fine bristles. The folding of the roller blind around the drive cables and the clawing of the bristles on the roller blind lead to a high

Blind material wear. In known from the prior art roller blind arrangements, a bias of the roller blind in the extension direction of the roller blind causes the two lateral edges of the roller blind to be pulled inwards, ie towards a vertical roller blind longitudinal center plane. The individual winding layers of the roller blind web are therefore possibly not wound up in a track-stable manner. This can lead to a wave and / or wrinkling on the roller blind in the edge regions.

The invention has for its object to provide a trained according to the introductory genus roller blind arrangement, in which a simultaneous use of drive means as drive members and as guide members of the roller blind in structurally simple manner possible and further ensures an at least approximately cylindrical roller blind.

This object is achieved by the roller blind arrangement with the features of claim 1.

The core of the invention is therefore that the roller blind is pressed within the guide tracks of the guide rails by the drive means formed as a toothed belt between the underside and the guide track bottom. This leads to an at least approximately U-shaped deflection of the roller blind within the guideways. As a result of the deflection, the roller blind web can in turn become clawed on the tooth edges of the teeth arranged on at least one side of the respective toothed belt, so that the roller blind web can be tensioned transversely to the withdrawal direction. The toothing of the toothed belt can thus engage directly in the material of the roller blind and get caught there. In addition, the timing belt can exert high holding forces on the roller blind. At the same time an actuation of the toothed belt can cause a winding of the roller blind on or unwinding of the roller blind from a winding shaft, with little force. Necessary for such a roller blind is an at least largely true to the track wound Rollowickel, ie a roller blind, in which the individual winding layers are directly above one another and not offset from each other wound onto the winding shaft. For this purpose, the winding shaft on conically tapered end portions. The conically tapering end regions ensure that forces running in the direction of the winding shaft pull the two lateral edges of the roller blind into their corresponding outer direction and engage at least substantially wrinkle-free or wave-free roller blind is produced without the winding layers experiencing an offset in roller blind transverse direction. Thus, depending on the embodiment of the winding shaft ensures a uniform and accurate Rollowickel that may be cylindrical, bulged or curved. This in turn ensures that the toothing of the toothed belt can be reliably and reproducibly engaged within the guide rails with the material of the roller blind, and thus a secure side guidance. As a result, if necessary, the required forces for actuating the roller blind arrangement can be reduced. The advantages of the invention are also in the reduction of ripples and wrinkles and in the reproducible overlap of the timing belt with the roller blind by the directional winding of the blind. Due to the conically tapering end portions and an actuating force of the roller blind assembly is reduced.

The conically tapering end regions can be used in particular in winding shafts with a straight or cylindrical lateral surface as well as in winding shafts with a convex or bulbous lateral surface.

The toothing of the toothed belt has, in a special embodiment of the roller blind arrangement according to the invention, teeth which extend at least approximately at right angles to the plane of the angled roller blind web between a toothed belt underside and a belt upper side.

The toothed belts, which have a substantially rectangular cross-section, can be installed edgewise in relation to the plane of the roller blind. Thus, the guide rails, in which the toothed belts are guided, be designed to be correspondingly narrow, so that they do not or only slightly affect the see-through range of the transparent vehicle section.

In a preferred embodiment of the roller blind arrangement according to the invention, the guide tracks likewise each have a substantially rectangular cross section which corresponds to the cross section of the respective toothed belt, wherein the

Roller blind is introduced via a respective lateral slot in the guideways and in the Ful mgsbahnen each between the respective guide rail and the timing belt in question is arranged.

In order to be able to realize the at least approximately U-shaped or inverted U-shaped deflection of the roller blind in the guide tracks, the slot is expediently arranged at a distance from the floor or the ceiling of the respective guide track.

In order to substantially prevent jamming or entanglement of an edge region of the roller blind, the guide tracks each have a tab guide on the side facing away from the slot, in which a respective edge strip of the roller blind engages.

To simplify the installation and to ensure trouble-free operation of the roller blind arrangement according to the invention, the toothed belts each have a toothing on two sides facing away from each other. In this way, when using a single drive pinion for the two toothed belts, a symmetrical structure of the guide arrangements arranged on both sides for the roller blind can be realized.

In order to be able to realize a standardized roller blind guide for different vehicle types, a special embodiment of the roller blind arrangement according to the invention has a roller blind which at its lateral edges relative to the vertical roller longitudinal center plane comprises a guide band which is connected to a central section of the roller blind and which is guided in the respective guide rail. The guide bands can represent a so-called standardized fabric module, which can be used regardless of the material forming the visible surface of the blind sheet material, which is the central portion, in roller blind assemblies according to the invention. Thus, always the same friction parameters can be realized within the preferably also standardized trained guide rails.

The drive means formed by the toothed belt can be guided in each case to a Zugspriegel, which is arranged on the side facing away from the roller blind roller blind. About the Zugspriegel, which is actuated by the drive means, the main pulling force is exerted on the roller blind when unwinding the roller blind. In order to drive the roller blind as possible noise and friction, the timing belt are expediently at least largely torsion between the drive pinion and the respective guide rail out.

A cone angle spanned between an axis of rotation of the winding shaft and a conical surface of the respective conically tapered end region can be in a range between 10 ° and 60 °, in particular approximately 30 °. In a specific embodiment of the roller blind according to the invention, the conically tapered end portions are each formed by a conically tapered end cap of the winding shaft. Further advantages and advantageous embodiments of the subject matter of the invention are the description, the drawings and the claims removed.

An embodiment of a roller blind arrangement according to the invention is shown schematically simplified in the drawing and will be explained in more detail in the following description. 1 shows a schematic plan view of a roof of a motor vehicle with a roller blind arrangement according to the invention;

Figure 2 is a plan view of the roller blind arrangement in isolation;

Figure 3 shows a section through the roller blind along the line III-III in

Figure 2; and FIG. 4 shows a longitudinal section of an end region of a winding shaft of the roller blind arrangement.

1 shows a vehicle roof 10 of a passenger car, which is otherwise not shown, which has a roof opening 12 which can be closed or at least partially released by means of a transparent cover element of a roof opening system (not shown here).

For shading the roof cutout 12, the vehicle roof 10 comprises a roller blind arrangement 14, which has a roller blind 16 made of a foldable or windable material. At its free end face, the roller blind 16 has a pull 18 extending in the vehicle transverse direction. At its edge remote from the drawbar 18, the roller blind 16 is fastened to a winding shaft 20 extending in the vehicle transverse direction. The winding shaft 20 comprises a rotatably mounted winding tube, which is biased by means of a winding spring, not shown, in the winding direction of the roller blind 16, so that the roller blind 16 when releasing the Zugspriegels 18 or in a corresponding process of Zugspriegels 18 in the direction of the winding shaft 20th automatically wound onto the winding shaft 20 to a roller blind. On both sides of a vertical roof or roller longitudinal center plane, the winding shaft 20 each has a conically tapered, in particular in Figure 4 illustrated end portion, which is formed by a respective end cap 46. The end caps 46 each correspond to the corresponding outer edge of the roller blind 16. The cone angle (a) spanned between the axis of rotation of the winding shaft 20 and a conical surface of the conically tapering end region is approximately 30 °. The end caps ensure a track-true winding of the roller blind, since acting in the direction of vertical roller longitudinal center plane tensile forces F is counteracted.

For guiding the draw bar 18 and for lateral filling of the roller blind 16, the roller blind arrangement 14 has a guide rail 22A or 22B on both sides relative to a vertical roof or roller longitudinal center plane, which extends in the vehicle longitudinal direction or in the withdrawal direction of the roller blind 16 along the relevant lateral edge of the roof opening 12 extends. The guide rails 22A and 22B may be part of the roof opening system or may be assigned only to the shade assembly 14.

For actuation, the roller blind arrangement has an electric drive motor 24 which drives a drive pinion 26 whose axis is perpendicular to the plane of an extended portion of the roller blind 16. For power transmission, the drive pinion 26 engages with two plastic toothed belts 28A and 28B, which constitute the drive means of the roller blind assembly 14. The Kunststoffzahnriemen 28A and 28B are respectively starting from the drive pinion 26 via a curved path, but torsion-free in a guide rail 30 of the respective guide rail 22A and 22B and in this to the

Zugspriegel 18 out and connected to this. The plastic toothed belts 28A and 28B are toothed belts, each having a toothing 32 and 34 on two opposite sides, wherein in the plastic toothed belt 28 A with respect to the roller blind 16 external toothing and the plastic toothed belt 28B relative to the roller blind 16 inside lying toothing with the drive pinion 26 is engaged. The teeth 32 and 34 each have teeth which extend at right angles to the plane of the roller blind 16 from a toothed belt upper side to a toothed belt lower side.

As can be seen from FIG. 3, the toothed belts 28A and 28B each have a substantially rectangular cross section which corresponds to a substantially rectangular cross section of the relevant guide track 30 of the respective guide rail 22A or 22B. The teeth 32 and 34 are arranged relative to the cross section on the longitudinal sides of the toothed belt, which are interconnected by the bottom and the top.

The roller blind 16 includes a central portion 36 which forms the visible surface of the shade 16. At their relative to the vertical roof longitudinal center plane arranged on both sides edges of the central portion 36 is provided on both sides in each case with a guide belt 38 which constitutes a so-called fabric module, which may be standardized in connection with the guide rails 22A and 22B. About the guide belts 38, the blind sheet 16 is guided in the guide rails 22A and 22B. For this purpose, the guide belts 38, which are each sewn to the central portion 36, engage in each case via a slit 40 extending in the longitudinal direction of the rail into the guide track 30 of the respective guide rail 22A or 22B. There, the guide strip 38 learn relative to the roof transverse direction, that is, as shown in the section of Figure 3, an at least approximately U-shaped deflection, so that the guide belt 38 between the bottom of the plastic toothed belt 28A and 28B and a bottom 42 of the guideway 30th is compressed.

At the side facing away from the slot 40 of the guideway 30, that is, after the U-shaped deflection, the guide belt 38 extends with its free edge region in a tab guide 44, which can be regarded as a guideway for the free edge strip of the guide belt 38 and also along the length of the respective guide rail 22 A and 22 B extends. As a result of the U-shaped deflection of the guide strip 38 in the guide track 30, the guide strip 38 can catch against the teeth 32 and 34 of the plastic toothed belt 28A or 28B. In particular, the toothing 34, which lies externally with respect to the vertical roof longitudinal center plane, engages directly into the material or the material of the guide strip 38. This high holding forces can be applied, which allow a wind deflector function of the roller blind assembly 14. Holding bristles or the like on the timing belt are not required. Rather, the timing belts 28A and 28B are bristle-free.

The guide bands 38 or, in the case of one-part construction, the entire roller blind 16 may or may be made of different materials, such as a knitted fabric, a woven fabric, an opaque or opaque material or the like. The fabric may in particular be specially treated in its engagement region, ie its guide region, which is arranged in the guide track 30 and be provided with a finish, a coating, at least one band and / or a special seam. This treatment is carried out according to standard manufacturing processes, such as sewing, welding, impregnation, coating, finishing or the like.

By using the standardized guide belts 38, the same friction partners can be used independently of the central section 36 to guide rails 22A and 22B and also to a between the drive pinion 26 and the respective guide rail 22A and 22B arranged guide tube and an outlet pipe for the respective beyond the drive pinion 26th lying expiring end of the plastic toothed belt 28A and 28B can be realized.

LIST OF REFERENCE NUMBERS

10 vehicle roof

12 roof opening

14 Roller blind arrangement

16 roller blind

18 drawbar

20 winding shaft

22A, B guide rail

24 drive motor

26 drive pinions

28A, B plastic toothed belt

30 guideway

32 toothing

34 toothing

36 central section

38 guide band

40 slot

42 floor

44 tab guide

46 end cap

Claims

claims

Roller blind arrangement for a motor vehicle for shadowing a transparent vehicle section, comprising a roller blind (16) which can be wound on a winding shaft (20) to form a roller blind and is guided at its lateral edges in a guide rail (22A, 22B) relative to a vertical roller longitudinal center plane , and a drive device with a drive pinion (26) which drives two drive means, each in a guide track (30) of the guide rails (22A, 22B) are guided, wherein the drive means are each formed as a toothed belt (28A, 28B), the has a substantially rectangular cross-section and on at least one side a toothing (32, 34), characterized in that the roller blind (16) between the underside of the toothed belt (28A, 28B) and a bottom (42) of the guide track (30) is compressed and viewed in the guide rail transverse direction in the guideway (30) by the toothed belt (28 A, 28 B) at least approximate rt is deflected U-shaped or the roller blind (16) between the top of the toothed belt (28 A, 28 B) and a ceiling of the guide track (30) is compressed and viewed in the guide rail transverse direction in the guide track (30) by the toothed belt (28 A, 28 B ) is at least approximately inverted U-shaped reversed and that the winding shaft (20) on both sides of the vertical Rollolängsmittelebene each having a to the respective lateral edge of the blind sheet (16) towards conically tapered end portion.

Roller blind arrangement according to claim 1, characterized in that the toothing (32, 34) has teeth which extend at least approximately at right angles to the plane of the unwound roller blind (16) between a toothed belt underside and a toothed belt top.

3. Roller blind arrangement according to claim 1 or 2, characterized gekennzeiclinet that the guide tracks (30) each have a substantially rectangular cross-section which corresponds to the cross section of the respective toothed belt (28 A, 28 B), and that the roller blind (16) via a respective lateral slot (40) is inserted in the guideways (30) and in the guideways (30) between the respective guide rail (22A, 22B) and the respective toothed belt (28A, 28B) is arranged.

4. Roller blind assembly according to claim 3, characterized in that the slot (40) from the bottom (42) or the ceiling of the respective guide track (30) is spaced.

5. roller blind assembly according to claim 4, characterized in that the guide tracks (30) on the side facing away from the slot (40) side a tab guide (44) into which engages a respective edge strip of the blind sheet (16).

6. roller blind arrangement according to one of claims 1 to 5, characterized in that the toothed belt (28 A, 28 B) each have on two opposite sides each have a toothing (32, 34).

7. roller blind arrangement according to one of claims 1 to 6, characterized in that the roller blind (16) at their relative to the vertical Rollolängsmittel flat lateral edges each have a guide strip (38) having a central portion (36) of the blind sheet (16) is connected and which is guided in the respective guide rail (22A, 22B).

8. Roller blind arrangement according to one of claims 1 to 7, characterized in that the drive means are each guided to a pull bar (18) which is arranged on the side facing away from the roller blind roll Rollobalm (16).

9. Roller blind arrangement according to one of claims 1 to 8, characterized in that the toothed belts (28A, 28B) are guided in each case at least largely torsionally between the drive pinion (26) and the respective guide rail (22A, 22B).

10. Roller blind arrangement according to one of claims 1 to 9, characterized in that between a rotational axis of the winding shaft (20) and a conical surface of the respective conically tapered end portion spanned cone angle (a) is in a range of 10 ° to 60 °, preferably about 30 °.

11. Roller blind arrangement according to one of claims 1 to 10, characterized in that the conically tapered end portions of the winding shaft (20) are each formed by a conically tapered end cap (46) of the winding shaft (20).