SHADING DEVICE

Description

[0001] The invention relates to a shading device according to the preamble of claim 1.

[0002] A corresponding shading device can, for example, be a vertical awning, in which the fabric is wound onto an upper shaft and can be pulled vertically downwards from this shaft. However, the invention is not limited to vertical awnings and can also be used with other fabric orientations. However, the following will assume a vertically oriented shading device, such as that shown in DE 10 2011 118 859 A1.

[0003] The fabric is wound onto the upper shaft and, at its lower end facing away from the upper shaft when stretched, is connected to a drop rod. This drop rod provides sufficient stability to the fabric during stretching and during withdrawal from the shaft. In order to provide improved stability to the fabric along the side edges extending from the shaft to the drop rod, and to prevent light from penetrating the side edges, it is known to also hold the side edges of the fabric. A lateral holder used for this purpose comprises a rod-shaped guide profile strip into which the side edge of the fabric is inserted and in which it is preferably held in a form-fitting manner. When the fabric is stretched or withdrawn, the side edge of the fabric is moved along the guide profile strip and held in this.

[0004] The guide profile strip, which is preferably made of plastic and formed from an extruded profile, is arranged inside a rod-shaped retaining profile strip, which can be permanently mounted to the building. The retaining profile strip is preferably also formed from a single or multiple assembled extruded profiles and can be made of plastic, aluminum, or metal.

[0005] The guide profile bar is mounted in a floating manner within the retaining profile bar, meaning it can move relative to the retaining profile bar, particularly perpendicular to its longitudinal extension. This ensures that external loads acting on the fabric, such as wind loads, can be absorbed and dissipated without causing excessive tension in the fabric, which could lead to its destruction. The floating mounting of the guide profile bar in the retaining profile bar can be achieved by a spring device acting between the guide profile bar and the retaining profile bar.

[0006] According to DE 10 2011 118 859 A1, the spring device is formed by a plurality of plastic spring clips that are placed laterally on the guide profile strip and snapped into place. However, this has the disadvantage that the production and assembly of the spring clips is very time-consuming and that the guide profile strip is only supported via the spring clips, i.e., only at a few points, which can lead to stress peaks at the spring clips.

[0007] EP 3 040 505 A1 discloses a shading device comprising an outer retaining profile strip with a chamber into which a guide profile strip is inserted. The guide profile strip is connected to a fabric in the usual manner and is mounted floatingly in the retaining profile strip, resting against a stop on its side facing away from the fabric. Two stop strips are mounted next to each other on the retaining profile strip at a distance from each other, serving as stops for the guide profile strip in the extension direction. This prevents the guide profile strip from being pulled out of the chamber of the retaining profile strip. A spring preloads the guide profile strip against the stop located on the rear side facing away from the fabric. This design requires a large number of components and is therefore difficult to assemble. Furthermore, the spring action is provided solely by the separate spring, which acts on the guide profile strip at a point.

[0008] DE 10 2016 125 383 A1, which is the basis of the preamble of claim 1, discloses a shading device with a stretchable fabric that engages with a guide profile strip (ZIP insert) on at least one side edge. The guide profile strip is arranged in a channel-like chamber of a retaining profile strip and is resiliently supported by a spring device.

[0009] For mounting, a retaining profile is clipped into the retaining profile strip and thus firmly locked into place. This ensures that the retaining profile is anchored in the chamber. Thus, the retaining profile is firmly connected to the retaining profile strip.

[0010] To provide resilient support for the spring profile strip, unspecified elastic elements are provided. These are inserted into the channels of the retaining profile and locked into place. Therefore, a multitude of elements are required to provide resilient support for the guide profile strip on the retaining profile strip, namely the retaining profile and the elastic elements. Their installation is not only complex but also difficult due to the limited space available.

[0011] The invention is based on the object of creating a shading device of the type mentioned, in which the guide profile strip is resiliently supported on the holding profile strip by means of a structurally simple and easy-to-install spring device.

[0012] This object is achieved according to the invention by a shading device having the features of claim 1. It is provided that the spring device has a spring profile strip, that the guide profile strip is inserted into a receiving space of the spring profile strip delimited by spring tabs and is mounted in a floating manner in the spring profile strip, and that the spring profile strip is mounted in a floating manner in the channel-like chamber of the holding profile strip and is supported on an inner wall of the chamber via at least one support arm, wherein the spring tabs together with a base section form a C-shaped cross-sectional area of ​​the spring profile strip.

[0013] The spring profile strip is preferably a single extruded profile, i.e., the spring profile strip has a constant cross-section along its entire length. The spring profile strip is preferably made of plastic and, considering the force flow, is arranged between the guide profile strip and the retaining profile strip. This means that forces acting on the fabric are diverted from the fabric to the guide profile strip. The guide profile strip is resiliently held within the spring profile strip and transfers at least some of the forces to the spring profile strip, deforming it. The forces are transferred from the spring profile strip to the retaining profile strip, where they are diverted.

[0014] The channel-like chamber in the retaining profile strip allows the spring profile strip to be inserted either from the end of the channel-like chamber or from the side of the retaining profile strip facing the fabric. In either case, the spring profile strip can be installed very quickly and easily. The chamber ensures that the spring profile strip is correctly positioned. Because the spring profile strip is inherently elastic and deformable, it can adapt to the geometric conditions within the chamber.

[0015] According to the invention, the spring profile strip is supported on the inner wall of the chamber by means of at least one support arm. The support arm is preferably an integral component of the spring profile strip and is preferably molded onto the base section of the spring profile strip in a freely projecting manner. In a preferred embodiment of the invention, the spring profile strip has at least two support arms. These can be configured such that the support arms, together with the connecting base section of the spring profile strip, form a further C-shaped cross-sectional area of ​​the spring profile strip.

[0016] The support arms can rest against the wall of the chamber and / or engage behind projections or contact surfaces of the retaining profile strip, so that the spring profile strip is securely positioned in the chamber in a form-fitting manner.

[0017] In order to hold the guide profile strip in the spring profile strip, the invention provides that the spring profile strip has a preferably channel-like receiving space into which the guide profile strip is inserted such that the guide profile strip can be moved transversely to its longitudinal extent relative to the spring profile strip within the receiving space. The receiving space is delimited by the spring tabs of the spring profile strip, which are preferably an integral part of the spring profile strip and preferably bear against the guide profile strip under spring force, i.e. are tensioned against the guide profile strip from the outside, for example. The spring tabs can be arranged between the support arms of the spring profile strip in the interior of the spring profile strip and form the C-shaped cross-sectional area with the base section of the spring profile strip.In particular, it can be provided that the base section of the spring profile strip together with the support arms and the spring tabs form a C-in-C-shaped cross-section, wherein the two C-shaped cross-sectional areas are connected or converge at their common base section.

[0018] In a further development of the invention, it can be provided that the receiving space for the spring profile strip has an access opening and that the guide profile strip is either completely received in the receiving space or protrudes slightly from it at the access opening when the fabric is not under load. The guide profile strip is adjustable relative to the spring profile strip, with the spring tabs being elastically deformed when the guide profile strip is adjusted. In particular, the guide profile strip can be partially pulled out of the receiving space of the spring profile strip through the access opening into a maximum extension position with elastic deformation of the spring tabs. In the extension position, the guide profile strip protrudes from the extension space but is not completely pulled out of it, so that the spring tabs still exert a holding force on the guide profile strip.

[0019] Preferably, the guide profile bar rests against a stop in its maximum extension position, which reliably prevents further withdrawal of the guide profile bar from the receiving space of the spring profile bar. The stop can be formed on the retaining profile bar, which is typically more stable, especially if it is made of aluminum or metal.

[0020] In one possible embodiment of the invention, the guide profile bar can have a trapezoidal or other tapered cross-sectional shape, with the cross-section decreasing toward the fabric and toward the access opening of the receiving space. When the guide profile bar is pulled out of the receiving space, the spring tabs are expanded by the conical cross-section of the guide profile bar and, in response, exert an external tension force on the guide profile bar.

[0021] The shape and orientation of the spring tabs of the spring profile strip are preferably selected so that the spring tabs are constantly in contact with the outer side of the guide profile strip. The maximum extension movement of the guide profile strip from the receiving space of the spring profile strip is limited by the stop against which the guide profile strip engages in the extended position.

[0022] Further details and features of the invention will become apparent from the following description of an embodiment with reference to the drawings. Fig. 1 a partial perspective view of the shading device, Fig. 2 the cross section II-II in Figure 1 and Fig. 3a Figure 2 corresponding cross-sectional view, with the guide profile strip in its maximum extension position.

[0023] Figure 1shows a partial view of a shading device 10, which has a fabric 11 connected at its lower end in a known manner to a transverse projection rod 12. At the upper end of the fabric 11, a fabric shaft (not shown) is provided, onto which the fabric 11 can be wound and from which it can be unwound by pulling the projection rod 12 downward in the tensioning direction V.

[0024] Along the vertical side edge of the fabric 11, a lateral support 14 is provided, which has a vertical rod-shaped support profile strip 15, which is preferably made of aluminum or metal and can be attached, for example, to a building wall. As shown in particular Figure 2 shows, the retaining profile strip 15 has a channel-like chamber 17 inside, which has a through opening 13 on its side facing the cloth 11.

[0025] The cloth 11 has on its vertical side edge a bead-like thickening 25, preferably extending over its entire height, with which the cloth 11 is inserted into a recess 27 of a guide profile strip 16. In this way, the cloth 11 is positively connected to the guide profile strip 16 and is displaceable relative to it in the longitudinal direction of the guide profile strip. The guide profile strip 16 is preferably made of plastic and is also designed as an extruded profile. It has a cross-section that tapers from its end facing away from the cloth 11 towards the cloth 11 and is conical or trapezoidal in shape. The dimensions of the chamber 17 and the guide profile strip 16 are coordinated such that the guide profile strip 16 can be moved within the chamber 17 transversely to its longitudinal direction, but cannot be completely removed from the chamber 17 through the through opening 13.

[0026] The guide profile strip 16 is mounted in the chamber 17 of the retaining profile strip 15 by means of a spring device 18. The spring device 18 is formed by a spring profile strip 19, which is inserted into the chamber 17. The spring profile strip 19 is made of plastic and is also designed as an extruded profile. On its side facing away from the fabric 11, the spring profile strip 19 has a base section 19a, at each of whose opposite ends a support arm 20 is integrally formed. The base section 19a and the two support arms 20 form a C-shaped outer cross-sectional area of ​​the spring profile strip 19.

[0027] Between the two support arms 20, two spring tabs 22 are formed on the base section 19a of the spring profile strip 19. A receiving space 21 is formed between the spring tabs 22, into which the guide profile strip 16 is inserted. The spring tabs 22 engage around the guide profile strips 16 in sections and exert a clamping force on the guide profile strip 16, which holds the guide profile strip 16 in the receiving space 21. The spring tabs 22, together with the base section 19a, form a further C-shaped cross-sectional area, so that the spring profile strip 19 has a C-in-C cross-section.

[0028] Formed on the retaining profile strip 15 are projections 26 that extend into the through-opening 13, reducing the width of the through-opening 13 such that the guide profile strip 16 cannot be pulled out through the through-opening 13. Stops 24 are formed on the projections 26, which limit the maximum extension movement of the guide profile strip 16 from the interior space 17 of the retaining profile strip 15 and from the receiving space 21 of the spring profile strip 19.

[0029] If an external force, such as wind force, acts on the fabric 11, this results in a tensile force being exerted by the fabric 11 via the thickening 25 on the guide profile strip 16, by which the guide profile strip 16 is pulled out of the receiving space 21 of the spring profile strip 19 under elastic deformation of the spring tabs 22 and against the spring forces exerted by the spring tabs 22 on the guide profile strip 16. The maximum extension position is defined by the guide profile strip 16 resting against the stops 24 of the projections 26 of the retaining profile strip 15, as shown in Figure 3is shown. However, the guide profile strip 16 is still located with its rear section facing away from the fabric 11 within the receiving space 21 of the spring profile strip 19 and is held by the deformed spring tabs 22. As soon as the load on the fabric 11 decreases, the spring tabs 22 pull the guide profile strip 16 back into the receiving space 21 of the spring profile strip 19, so that the Figure 2 shown starting position is reached.

Claims

1. Shading device comprising a cloth (11) that can be spread out, is connected to a lead bar (12) at its end pointing in the spreading-out direction (V) and engages with a profiled guide rail (16) on at least one side edge, the profiled guide rail (16) being arranged in a channel-like chamber (17) of a profiled holding rail (15) and being resiliently supported on the profiled holding rail (15) by means of a spring device (18), characterized in that the spring device (18) has a profiled spring rail (19), in that the profiled guide rail (16) is inserted into a receiving space (21) of the profiled spring rail (19) that is delimited by spring clips (22) and said profiled guide rail is floatingly mounted in the profiled spring rail (19), and in that the profiled spring rail (19) is floatingly mounted in the channel-like chamber (17) of the profiled holding rail (15) and is supported on an internal wall of the chamber (17) by means of at least one support arm (20), wherein the spring clips (22) together with a base portion (19a) form a C-shaped cross-sectional region of the profiled spring rail (19).

2. Shading device according to claim 1, characterized in that the support arm (20) is an integral component of the profiled spring rail (19).

3. Shading device according to either claim 1 or claim 2, characterized in that the profiled spring rail (19) has at least two support arms (20).

4. Shading device according to claim 3, characterized in that the support arms (20) together with said base portion (19a) that connects them form a C-shaped cross-sectional region of the profiled spring rail (19).

5. Shading device according to claim 4, characterized in that the base portion (19a) of the profiled spring rail (19) together with the support arms (20) and the spring clips (22) form a C-in-C-shaped cross section.

6. Shading device according to any of claims 1 to 5, characterized in that the spring clips (22) are clamped against the profiled guide rail (16) from the outside.

7. Shading device according to any of claims 1 to 6, characterized in that the receiving space (21) has an access opening (23), and in that the profiled guide rail (16) can be partially pulled out of the receiving space (21) of the profiled spring rail (19) through the access opening (23), with elastic deformation of the spring clips (22), as far as a maximum pull-out position.

8. Shading device according to claim 7, characterized in that the profiled guide rail (16) rests against a stop (24) in the maximum pull-out position.

9. Shading device according to claim 8, characterized in that the stop (24) is formed on the profiled holding rail (15).

10. Shading device according to any of claims 7 to 9, characterized in that the profiled guide rail (16) has a trapezoidal cross section which tapers toward the access opening (23).