Piping for a sun protection system

Abstract

The invention relates to a keder (10) for a sun protection system (100) for redirecting at least one system cord (102) of the sun protection system (100), wherein the keder (10) is made of metal, preferably aluminum, and has a keder base (13) and at least one round or elliptical recess (11) for passing through a system cord (102), the recess (11) extending through the keder base (13). Furthermore, the invention relates to a sun protection system (100) with at least one keder (10) and with a variable-size sun protection curtain (101) and with at least one system cord (102), as well as a method for manufacturing a keder (10) for a sun protection system (100).

Description

[0001] The invention relates to a keder for a sun protection system for deflecting at least one system cord of the sun protection system according to the preamble of claim 1. Furthermore, the invention relates to a sun protection system with such a keder and a method for manufacturing such a keder.

[0002] Sun protection systems, in particular blinds or pleated blinds, are known in various embodiments from the prior art. The sun protection fabric, which may comprise several slats or be designed as a fabric with a multitude of pleats, can be held vertically slidable by system cords. For this purpose, an upper end of the sun protection fabric could be attached to a top rail or a lower end to a bottom rail, whereby the top rail and bottom rail can be moved independently of each other along the system cords to change the size of the sun protection fabric. The system cords of the sun protection system can run through deflection elements to which the sun protection systems are mounted under tension. Due to the tension, the top rail and the bottom rail can be moved and remain in the desired position after the movement.The adjustable size of the sunshade allows for customized sun protection to be precisely tailored to the current needs. The system cords can be redirected within the tracks, either the top or bottom rail, of the sunshade system. Once the cords are threaded and guided within the tracks, the keder (or spline) can be inserted into the tracks as a cover strip. Typically, one end of the sunshade can be wrapped around the keder and inserted into the profile rail. However, this method increases the installation effort. Furthermore, the system cords must be routed out of the sunshade system's tracks laterally or through the keder so that they can extend along the rest of the sunshade.Standard keder (seam) is stamped from semi-finished plastic products and then fitted with eyelets, typically using bar stock as the starting material. Due to the use of bar stock, this process results in an excessively high amount of waste, usually around 30%.

[0003] Based on this prior art, the object of the present invention is therefore to propose a new keder that is stable and durable and can also be manufactured with minimal effort and resource conservation. Furthermore, the keder should be universally adaptable, particularly to different sun protection systems, and the effort required to mount the keder to the sun protection system should be minimized.

[0004] This problem is solved in a surprisingly simple yet effective manner by a keder according to the teaching of independent claim 1. Furthermore, a sun protection system with a keder according to the invention and a method for manufacturing the keder are proposed.

[0005] According to the invention, a keder for a sun protection system is proposed for redirecting at least one system cord of the sun protection system, wherein the keder is made of metal. Preferably, the keder is made of aluminum. The keder has a keder base and at least one round or elliptical recess through which a system cord of the sun protection system can be guided, the recess extending through the keder base. The recess in the keder base for guiding a system cord is preferably round or elliptical in plan view. The keder base, which forms the main body of the keder, is preferably made of a metal strip. The recess can have a width and / or a diameter that is significantly larger than the diameter of the system cord. For example, the diameter or width can be at least twice the diameter of the system cord.This allows the system cord to be easily guided through the recess. Because the keder is made of metal, it is extremely stable and durable, and can simultaneously form a high-quality and visually appealing finish to a profile rail, such as a top or bottom rail, of the sun protection system. The keder can be easily manufactured from a metal strip and, in particular, cut to length from it, resulting in minimal waste during production. Consequently, the keder according to the invention can be manufactured in an extremely resource-efficient manner, especially in terms of material usage.Furthermore, the installation of the sun protection system is simplified, as a system cord can be easily guided through the round or elliptical recess of the keder towards a sunshade curtain of the sun protection system and deflected at the recess, so that no further openings in the rail or deflection devices need to be provided.

[0006] Within the scope of the invention, the term "keder" refers to a reinforcing element to which a sunshade curtain of a sun protection system can be attached and reinforced, wherein the keder can simultaneously serve as a cover for an upper rail and / or lower rail of a sun protection system. It is essential within the scope of the invention that at least one system cord can be passed through the keder.

[0007] Advantageous embodiments of the invention are the subject of the dependent claims. The scope of the invention also includes all combinations of at least two features disclosed in the description, the claims, and / or the figures. It is understood that the descriptions of the keder apply equivalently to the sun protection system and the method according to the invention, without being specifically mentioned for each. In particular, it is understood that common linguistic transformations or a meaningful substitution of respective terms within the scope of usual linguistic practice, especially the use of synonyms supported by generally accepted linguistic literature, are included in the present disclosure without being explicitly mentioned in their respective formulations.

[0008] Within the scope of the invention, it was recognized that, to reinforce the recess, an eyelet encompassing the recess can advantageously be included. The eyelet is designed as a pull-through eyelet, whereby the eyelet can, on the one hand, stabilize the keder base in the area of ​​the recess and, on the other hand, allow the system cord to be redirected or guided without damage. The eyelet can be made of metal or plastic. Preferably, the eyelet is made of metal, more preferably of aluminum.

[0009] The eyelet can be easily pressed into the keder base and / or embossed by deforming the keder base in the area of ​​the recess. Pressing in the eyelet offers high flexibility while simultaneously minimizing stress on the keder base material. Embossing, on the other hand, advantageously eliminates a connection point, which represents a potential weak point. By selectively deforming the keder base material, the material in the eyelet area is strengthened, thus eliminating the risk of the eyelet, such as a pressed-in one, coming loose.

[0010] According to a preferred embodiment, the eyelet is formed integrally with the keder base. In particular, the eyelet is formed integrally with the keder base in such a way that the eyelet is embossed into the keder base. Even more preferably, the entire keder is formed in one piece. This one-piece construction significantly increases the stability of the keder, especially in the area of ​​the eyelet, compared to a multi-part design. Furthermore, a one-piece design eliminates an assembly step and reduces the number of parts.

[0011] According to an advantageous embodiment, a free end section of the eyelet can run at an acute angle α to the central axis of the recess. This advantageously bends away the free end of the eyelet, which encompasses the recess, and the opening of the recess and the central axis of the recess, thus preventing damage to the system cord guided through the recess, for example, due to a sharp edge on the free end section of the eyelet. Furthermore, by designing the eyelet with an end section running at an acute angle α to the central axis of the recess, the deflection of the system cord can be facilitated. Within the scope of the invention, the central axis is the axis that passes through the center of the ellipse or circle that defines the size of the round or elliptical recess. The central axis preferably runs perpendicular to the longitudinal axis of the keder base.Preferably, the end section of the eyelet runs at an angle of inclination α between 20° and 70° to the central axis of the recess. More preferably, the end section of the eyelet runs at an angle of inclination α of 45° to the central axis of the recess.

[0012] The keder base can have an arc shape, a C-shape, or a V-shape in cross-section. The arc shape, C-shape, or V-shape gives the keder base, and thus the entire keder, higher bending stiffness, especially compared to a flat sheet of the same material thickness. Due to the design of the keder base, the applied forces can be distributed evenly across the entire structure, thus increasing the load-bearing capacity with a reduced material thickness. Preferably, the keder base has a C-shape in cross-section.

[0013] It has proven advantageous if at least one side of the keder base is coated with a sliding coating. This sliding coating reduces friction between the keder base and the system cord, allowing the cord to slide as smoothly as possible along the coated side of the keder base and thus reducing wear, particularly abrasion. Preferably, at least one side of the keder base is coated with PTFE (polytetrafluoroethylene). PTFE coatings offer particularly good sliding properties.

[0014] On the side of the keder base opposite the sliding coating, an adhesive element can be arranged for attaching the keder to a sunshade fabric of a sun protection system. For easy attachment of the keder to a sunshade fabric, the adhesive element has an adhesive side facing away from the keder base. Preferably, the adhesive element is designed as a double-sided adhesive tape, so that the adhesive element can be attached quickly and reliably to both the keder base and the sunshade fabric.

[0015] The keder base can be rectangular in plan view. Additionally or alternatively, at least one corner of the keder base can have a rounded or chamfered edge. Preferably, the keder base is rectangular in plan view, and at least one corner, more preferably all corners, of the rectangular keder base have a rounded or chamfered edge. The rounded or chamfered edge of at least one corner of the keder base not only improves the visual appearance but also increases the stability of the keder and reduces the risk of damage to the sun protection system in which the keder is to be used during handling, installation, and / or use.

[0016] In a second aspect, the invention relates to a sun protection system with at least one keder according to the invention, described elsewhere, and with a sunshade that can be adjusted in size and has at least one system cord. The sunshade is attached to the keder, and the system cord is guided through the eyelet of the keder. Preferably, the system cord is guided through the eyelet of the keder in such a way that the system cord is deflected by means of the eyelet.

[0017] The sun protection system can have at least one profile rail, preferably a top rail and a bottom rail, with the adjustable sunshade fabric arranged on the profile rail. Preferably, the sunshade fabric is arranged between the top rail and the bottom rail. The top rail and the bottom rail can be arranged to be freely displaceable from one another in the vertical direction on the system cords. The sunshade fabric and the top rail or bottom rail can be mounted, for example, on at least one system cord, such that the top rail or the bottom rail can be displaced by a force exerted by the user. It is also conceivable that the top rail and / or the bottom rail is fixed in its position when unloaded, i.e., without force being exerted by a user.The bottom rail is preferably arranged vertically below the sunshade, and the top rail is preferably arranged vertically above the sunshade. This means that the sunshade is arranged between the top rail and the bottom rail, whereby the top rail and the bottom rail can be freely or guidedly displaceable transversely to their longitudinal extent, particularly in the vertical direction.

[0018] Within the scope of the invention, it is conceivable that the sun protection system is designed in the manner of a Venetian blind or a pleated blind. A sun protection system designed in the manner of a Venetian blind can have a sunshade fabric with a plurality of parallel sun protection elements arranged as slats. A sun protection system designed in the manner of a pleated blind can have a sunshade fabric with a plurality of parallel pleats, wherein, within the scope of the invention, each pleat forms a sun protection element of the sunshade fabric. The system cord preferably runs from the bottom rail through the sunshade fabric to the top rail. Preferably, the system cord can be attached to a frame of a window or door opening, which is to be covered or shaded by the sun protection system.

[0019] According to an advantageous embodiment, the first and last sun protection elements of the vertically variable sunshade can each be attached to a keder. If the sunshade system has a top rail and a bottom rail, the sunshade element closest to the top rail is attached to a keder, and the sunshade element closest to the bottom rail is attached to a keder. The sunshade element can, for example, be a pleat of a sunshade, if the sunshade system is designed as a pleated blind, or a slat, if the sunshade system is designed as a Venetian blind.Provided that at least one sun protection element is attached to the top rail with at least one keder and another sun protection element is attached to the bottom rail of the sun protection system with one keder, the cord guidance can be carried out in a simple manner, thereby increasing the stability of the sun protection system and minimizing the assembly and manufacturing effort.

[0020] In another aspect, the invention relates to a method for manufacturing a keder for a sun protection system comprising the following steps: Step a. Shaping a metal strip, preferably by means of a roll former through roll forming, to produce the arc-shaped, C-shaped or V-shaped contour of the keder base as viewed in cross-section; Step b. Creating at least one recess, for example by punching holes, the number of recesses being determined depending on the width of the sun protection system; and Step c. Stamping an eyelet, in particular a through eyelet, and / or pressing in an eyelet, in particular a through eyelet.

[0021] Using the method for manufacturing a keder for a sun protection system, a metallic keder can be produced in a simple manner by shaping a metal strip, subsequently creating a recess in the keder base, and embossing and / or pressing in an eyelet. Preferably, the metal strip is shaped by roll forming using a roll former, so that a keder with a keder base having an arcuate, C-shaped, or V-shaped contour in cross-section can be produced from the preferably flat metal strip, which can serve as the starting material for the method according to the invention.

[0022] The keder base, formed from a metal strip, can be fitted, preferably by punching holes, with at least one recess suitable for the passage of a system cord, which therefore has a greater width and / or diameter than the system cord. The number of recesses can be determined depending on the width of the sun protection system. Preferably, both the number of recesses and their positioning within the keder base are determined according to the width of the sun protection system.

[0023] Subsequently, at least one eyelet encompassing the recess can be embossed or pressed into the keder base. Preferably, an eyelet designed as a pull-through eyelet is embossed. After embossing the eyelet, it is conceivable that an adhesive element is applied to one side of the keder, which serves to attach the keder to a sunshade curtain of a sun protection system. The method according to the invention is particularly suitable for producing the keder described elsewhere in the invention.

[0024] It is conceivable that steps b and c of the process are carried out in parallel, meaning that the recess is created in the keder base while the eyelet is being embossed. For this purpose, a bead can first be embossed upwards, then the keder base can be pre-punched in the area of ​​the bead, and subsequently an embossing downwards can be performed, whereby the free end section of the eyelet can then be widened so that the free end section of the eyelet runs at an acute angle to the central axis of the recess.

[0025] To improve the sliding properties of the system cord on the welt, the method according to the invention can include an additional step a0 prior to step a., which comprises coating a metal strip and / or providing a coated metal strip. If the metal strip is provided as a coated metal strip, it can be provided as a coil and / or wound onto a coil. Preferably, the metal strip is coated with PTFE (polytetrafluoroethylene) or a PTFE-coated metal strip is provided.

[0026] It has proven advantageous if the method includes a further step d., which involves cutting the keder to a desired length, the length of which can be determined depending on the width of the sun protection system. Thus, the length of the keder can be individually adapted to the respective sun protection system, in particular its width. For this purpose, cutting marks can be applied to the metal strip, at or between which the keder is cut to the desired length. It is conceivable that step d., namely cutting the keder to a desired length, takes place after step a0, after step a, after step b, or after step c. It has proven particularly advantageous if cutting the keder to a desired length according to step d. takes place after embossing or pressing in an eyelet, and thus after step c.This allows the essentially finished welt to be advantageously separated from the rest of the metal strip by cutting it to the desired length, resulting in no or only minimal waste.

[0027] After cutting the keder to the desired length, as is done in step d., the procedure may include an additional step e. in which the corners of the keder are rounded or chamfered.

[0028] It is understood that the aforementioned and subsequently explained embodiments and exemplary embodiments can be implemented not only individually, but also in any combination with one another, without departing from the scope of the present invention. It is also understood that the aforementioned and subsequently explained embodiments and exemplary embodiments relate in an equivalent or at least similar manner to the sun protection system and the method according to the invention, without being specifically named for each.

[0029] Embodiments of the invention are shown schematically in the drawings and are explained below by way of example.

[0030] They show: Fig. 1 a first embodiment of a keder according to the invention in top view; Fig. 2 a second embodiment of a keder according to the invention in top view; Fig. 3the keder according to the first embodiment in sectional view along the section line AA Fig. 1 ; Fig. 4 Detail B from Fig. 3 ; Fig. 5 the keder according to the first embodiment in side view; Fig. 6 the keder according to the first embodiment with an end cap of a sun protection system in an isometric view from above; Fig. 7 the keder according to the first embodiment with an end cap of a sun protection system in isometric view from below; Fig. 8 a sun protection system according to the invention; and Fig. 9 the keder according to the first embodiment with the lower rail of a sun protection system in a side section view.

[0031] Fig. 1Figure 1 shows a first embodiment of a keder 10 according to the invention with an eyelet 12 embossed in the keder base 13. The eyelet 12 encompasses the recess 11 through which a system cord 102 (not shown) of a sun protection system 100 (not shown) can be guided. The Fig. 1 The first embodiment of the keder 10 shown differs from the one with Fig. 2 In the second embodiment of the keder 10 shown, the corners 15 are rounded. In other words, each longitudinal side L1, L2 of the keder base 13 is connected to an end face S1, S2 of the keder base 13 by a rounded section 17.

[0032] The further specific design of the keder 10 according to the first embodiment can be seen in a summary of the Figs. 3 to 7 can be extracted. It is from the Fig. 3 shown section view along section line AA from Fig. 1It is evident that one side of the keder is coated with a sliding coating. From the with Fig. 4 shown detail B from Fig. 3 It is clearly evident that the free end section 16 of the eyelet 12 runs at an acute angle α to the central axis M. The dashed line extending from the free end section 16 is merely an auxiliary line to illustrate the acute angle α. The central axis M runs perpendicular to the longitudinal axis of the keder 10. A system cord 102 (not shown here) can be guided through the recess 11 encompassed by the eyelet 12. Because the free end section 16 of the eyelet 12 runs at an acute angle α to the central axis M of the recess 11, the system cord 102 can be guided, as for example in Fig. 6 shown, guided through the recess 11 in such a way that the system cord 102 does not touch the end of the free end section 16, which may possibly be sharp-edged.

[0033] Fig. 5 Figure 1 shows the keder 10 according to the first embodiment with eyelet 12 and keder base 13 in cross-section. It can be seen that the keder base 13 has a C-shape in cross-section.

[0034] The Figures 6 and 7 In summary, the routing of a system cord 102 through and along the keder 10 can be seen. The system cord 102 can be, as with Fig. 6 As shown, it can be inserted from above through the recess 11 encompassed by the eyelet 12. As shown from Fig. 7 As can be seen, the system cord 102 is deflected after exiting the eyelet 12 and guided along the keder base 13 to an end cap 106 of the sun protection system 100. To simplify the operation of the sun protection system 100 and reduce wear on the system cord 102, a sliding coating 14 is applied to one side of the keder base 13. The sliding coating 14 is, as shown with Fig. 7shown, applied to the side of the keder base 13 along which the system cord 102 is guided. On the side of the keder base 13 opposite the uniform coating 14, an adhesive element can be used to attach the keder 10 to a surface in the Figures 6 and 7 The sunshade 101 of a sunshade system 100, not shown, may be arranged.

[0035] Fig. 8Figure 1 shows the basic structure of a pleated sun protection system 100 according to the invention, comprising a pleated sun protection curtain 101. A top rail 103 is provided at the upper end of the sun protection curtain 101, and a bottom rail 104 is provided at the lower end of the sun protection curtain 101. The top rail 103 and the bottom rail 104 are aligned parallel to the pleats of the sun protection curtain 101. During operation of the sun protection system 100, the top rail 103 and the bottom rail 104 are displaceable transversely to their longitudinal extent. According to the illustrated embodiment, the top rail 103 and the bottom rail 104 can be guided and displaced by the side profiles 105. However, it is also conceivable that the top rail 103 and the bottom rail 104 are freely displaceable.To return the upper rail 103 and / or the lower rail 104 to a straight position, i.e., predominantly a horizontal position, after the sun protection system 100 has been actuated, and to support the sun protection curtain 101, the sun protection system 100 has at least one system cord 102. The system cords 102 can be held by a tensioning device and run through the lower rail 104, exit through the recess 11 of the keder 10 towards the sun protection curtain 101, continue through the openings arranged in the sun protection curtain 101 towards the upper rail 103, enter the upper rail 103 through the recess 11 of the keder 10 arranged on the upper rail 103, and run inside the upper rail 103 to a further tensioning device.

[0036] Fig. 9 The lower rail 104 with the keder 10 is shown in a side section view. In conjunction with Figs. 6 and 7, which also aligns the keder 10 for arrangement on a in Figs. 6 and 7 The lower rail 104, not shown, shows that it is evident that one in Fig. 9 The system cord 102 (not shown) can be inserted from above through the eyelet 12 into the lower rail 104 and can be routed further within the lower rail 104, for example to a clamping device. The lower rail 104 can be connected laterally to the Figs. 6 and 7 The end cap shown is 106. Reference symbol list

[0037] 10. Keder 11. Recess 12. Eyelet 13. Keder base 14. Sliding coating 15. Corner 16. End section 17. Rounding 100 Sun protection system 101 Sun protection curtain 102 System cord 103 Top rail 104 Bottom rail 105 Side profile 106 End cap Center axis L1, L2 Longitudinal side S1, S2 End side

Claims

1. Keder (10) for a sun protection system (100) for redirecting at least one system cord (102) of the sun protection system (100), characterized by that the keder (10) is made of metal, preferably aluminium, and has a keder base (13) and at least one round or elliptical recess (11) for passing a system cord (102), wherein the recess (11) extends through the keder base (13).

2. Welt according to claim 1, characterized by that the keder (10) has at least one eyelet (12) encompassing the recess (11).

3. Welt according to claim 2, characterized by that the eyelet (12) is pressed and / or embossed into the keder base (13).

4. Welt according to claim 2 or 3, characterized by that the eyelet (12) is formed in one piece with the keder base (13).

5. Welt according to one of claims 2 to 4, characterized by thata free end section (17) of the eyelet (12) runs at an acute angle of inclination α to the central axis (M) of the recess (11).

6. Welt according to one of claims 1 to 5, characterized by that the keder base (13) has an arc shape, C shape or V shape in cross-section.

7. Welt according to one of claims 1 to 6, characterized by that at least one side of the keder base (13) is coated with a sliding coating (14), preferably with PTFE.

8. Welt according to claim 7, characterized by that on the side of the keder base (13) opposite the sliding coating (14) an adhesive element is arranged for attaching the keder (10) to a sunshade curtain (101).

9. Welt according to one of claims 1 to 8, characterized by that the keder base (13) is rectangular in plan view and / or at least one corner (15) of the keder base (13) has a rounding (17) or chamfer.

10. Sun protection system (100) with at least one keder (10) according to one of the preceding claims and with a sun protection curtain (101) that can be varied in size and with at least one system cord (102), wherein the sun protection curtain (101) is attached to the keder (10) and the system cord (102) is guided through the eyelet (12) of the keder (10).

11. Sun protection system (100) according to claim 10, characterized by that the first sun protection element (103) and the last sun protection element (104) of the sun protection curtain (102) which extends in a vertical direction and varies in length are each attached to a keder (10).

12. Method for manufacturing a keder (10) for a sun protection system (100), in particular a keder (10) according to claims 1 to 9, comprising the following steps: a. Shaping a metal strip, preferably by means of a roll former by roll forming, to produce the arc-shaped, C-shaped or V-shaped contour of the keder base (13) as viewed in cross-section; b. Providing at least one recess (11), for example by punching, wherein the number of recesses (11) is determined depending on the width of the sun protection system (100); and c. Embossing an eyelet (12), in particular a pull-through eyelet, and / or pressing in an eyelet (12), in particular a pull-through eyelet.

13. The method of claim 12, wherein the method prior to step a. comprises the following additional step a0.: a0. Coating a metal strip and / or providing a coated metal strip, wherein the metal strip may be provided as a coil and / or wound into a coil.

14. Method according to claim 12 or 13, wherein the method comprises the following additional step d.: d. cutting the keder (10) to a desired length, wherein the length is determined depending on the width of the sun protection system (100).

15. Method according to any one of claims 12 to 14, wherein the method comprises the following additional step e.: e. Rounding or chamfering the corners (15) of the keder (10).

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