System for rolling up and down a material web

Abstract

The present invention relates to a system 1 for rolling up and unrolling a material web 20, in particular a sun sail. The system comprises a shaft 10 and a material web 20, as well as at least one holding cable 40, 50, and a traction cable 60.

Description

Field of the invention

[0001] The invention relates to a system for rolling up and unrolling a material web, in particular a sun sail. background

[0002] State-of-the-art systems for rolling up and unrolling a material web, such as awnings or sun sails, typically require structures to support the material web. These support structures are often very prominent and detract from the visual appearance of the actual material web. Furthermore, the support structures for the material web are often heavy and bulky.

[0003] In the case of awnings, the support structure is typically attached to a building facade and includes a roller tube and a frame that supports the shade-providing material when unrolled. Therefore, the frame is particularly visible when unrolled.

[0004] If the frame is to be omitted, so-called awnings can be used. These are often permanently installed and require complicated removal (for example, in the event of severe weather). An alternative are roll-out or fold-out awnings. These are guided by rails or cable systems. These rails and cable systems take up a lot of space, especially when the material is rolled up, and can thus impair the appearance of the system. Description of the invention

[0005] Against this background, the object of the present invention is to provide a system for winding and unwinding a material web which at least partially overcomes the aforementioned disadvantages.

[0006] This object is achieved according to the invention by a system for winding and unwinding a material web according to claim 1. Further aspects of the invention are described in the dependent claims and in the following description.

[0007] In particular, the task is solved by a system for rolling up and unrolling a material web. The material web could, for example, be a sunshade.

[0008] The system according to the invention comprises at least one shaft and a material web. The material web is attached to the shaft at a first end. The attachment can be direct or indirect. Furthermore, the shaft is rotatable. By rotating the shaft, the material web can be unrolled or wound up, i.e., transferred from a wound state to an unwound state (unwinding). Likewise, by rotating the shaft, the material web can be transferred from an unwound state to a wound state (winding up).

[0009] The system further comprises at least one extension element. The extension element is attached to a second end of the material web, which second end is opposite the first end. The extension element can, for example, extend over the entire length of the second end. It is also possible for the extension element to be longer or shorter than the second end of the material web. In one aspect, the extension element is rod-shaped. For example, the extension element can be an extruded profile and made of plastic and / or metal (especially aluminum).

[0010] The pull-out element can also be attached to the material web directly or indirectly (e.g., via a piping rail, rivets, eyelets, and / or the like). In another aspect, the pull-out element is at least partially folded into the material web. For example, the material web can have at least one pocket at its second end, in which the pull-out element is at least partially accommodated.

[0011] Furthermore, the system can comprise a housing in which the shaft and the rolled-up material web are at least partially accommodated. The pull-out element can be configured to at least partially close the housing when the material web is in the rolled-up state. Thus, the material web is protected from environmental influences.

[0012] The extension element has at least one retaining cable connecting element and at least one tension cable connecting element. The retaining cable connecting element and / or the tension cable connecting element can be designed, for example, as an opening, eyelet, bolt, pulley, and / or the like. The retaining cable connecting element serves to connect a retaining cable to the extension element. The tension cable connecting element serves to connect a tension cable to the extension element. The retaining cable connecting element is spaced apart from the tension cable connecting element by a distance x. This distance x is fixed and does not change during unwinding or rewinding.

[0013] The tether cable can be connected directly or indirectly to the tether cable connecting element, and the traction cable can be connected directly or indirectly to the traction cable connecting element. In a direct connection, no additional element is arranged between the cable and the connecting element.

[0014] In an indirect connection, at least one further element, such as a tensioning element or an elastic element, is arranged between the rope and the connecting element. The connection can also be rigid, so that no relative movement occurs between the rope and the corresponding connecting element. In another aspect, relative movement is permitted and / or the rope is deflected at the connecting element. In this example, the connecting element can be designed as an eyelet. If the rope is to be deflected but relative movement is to be avoided or at least reduced, the connecting element can comprise a pulley that guides the rope.

[0015] The connection between the tether and the tether connecting element or the connection between the pull rope and the pull rope connecting element enables a transmission of force from the rope (tether or pull rope) to the corresponding connecting element (tether connecting element or pull rope connecting element) and thus to the extension element.

[0016] The system further comprises a pull cable and at least one retaining cable. By applying a tensile force to at least one end of the pull cable, the material web can be unwound. The pull cable transfers part of the tensile force to the pull cable connecting element. The retaining cable serves to transfer part of the tensile force to the retaining cable connecting element. The tensile force is thus transferred by the retaining cable to different points on the extension element. This allows the extension element to be extended as evenly as possible, particularly parallel to the shaft. This prevents the formation of wrinkles in the material web during unwinding (and correspondingly during rewinding).

[0017] As described above, the retaining cable is connected (directly or indirectly) to the retaining cable connecting element. Furthermore, the retaining cable comprises a pull-cable deflection element (e.g., an eyelet, a roller, and / or the like) at an end facing away from the retaining cable connecting element. This end of the retaining cable is preferably a free end. The retaining cable is configured such that a distance d between the retaining cable connecting element and the pull-cable deflection element increases when the material web is transferred from the rolled-up state to the unrolled state (i.e., is pulled on the pull-cable).

[0018] Furthermore, the holding rope (and / or an elastic element) is designed so that the maximum distance d between the holding rope connecting element and the traction rope deflection element is limited.

[0019] Preferably, the maximum distance d is selected such that the holding cable and the pulling cable form a substantially isosceles triangle with the extension element (the extension element forms the base) when the material web is transferred from the rolled-up state to an unrolled state. At the pulling cable deflection element, the holding cable and the part of the pulling cable that is guided between the pulling cable deflection element and the pulling cable connecting element can enclose an angle o in the range from 50° to 130°, or in the range from 60° to 120°. The pulling cable is deflected at the pulling cable deflection element and is connected to the pulling cable connecting element. A tensile force acting on the pulling cable is partially transferred via the pulling cable to the pulling cable connecting element and thus to the extension element.Another portion of the tensile force is absorbed by the retaining cable via the pull-cable deflection element and transferred to the retaining cable connecting element and thus to the extension element. This tensile force causes the material web to be transferred from the rolled-up state to the unrolled state.

[0020] Since the distance d between the retaining cable connecting element and the pull cable deflection element increases (until the maximum distance is reached) when the material web is transferred from the rolled-up to the unrolled state, i.e. when the pull cable is pulled, and decreases accordingly when pulling is no longer applied or the pulling force is reduced, the retaining cable can rest against the extension element, particularly when the material web is in the rolled-up state. Consequently, when the material web is rolled up, the retaining cable is not or only slightly distinguishable from the extension element and is therefore visually unobtrusive. When the material web is unrolled, the distance increases and the pull cable and the retaining cable can form a tension triangle (in particular an isosceles triangle) which extends from the extension element, more precisely from the retaining cable connecting element and the pull cable connecting element, to the pull cable deflection element.This allows the pulling force to be transmitted to two different areas or points of the extension element via the pull cable and the retaining cable. This allows for even extension.

[0021] Furthermore, the tension triangle formed distributes the tensile force acting on the extension element through the material web across several distributed points and from there transfers it to the tension or holding cable. This allows the extension element to be designed to be slim and therefore visually appealing, without the risk of bending or even kinking due to the acting tensile forces. Furthermore, the extension element is held in as horizontal a position as possible by the tension triangle, even under external loads such as wind loads, or quickly returns to this position. Furthermore, the holding cable can comprise an elastic element and / or be connected to the extension element via an elastic element. In one aspect, the holding cable is designed as an elastic element (for example as a cable that is at least partially elastic). The elastic element can be an elastic cable, an elastic cable section, a spring, in particular a spiral spring and / or the like.

[0022] If the holding cable is connected to the extension element via an elastic element, the holding cable can, for example, be partially wound up on a roller or shaft, which roller / shaft is pre-tensioned with an elastic element (for example a torsion spring) so that the holding cable rolls up when no tensile force acts on the holding cable.

[0023] The elastic element causes the distance d between the holding rope connecting element and the pulling rope deflection element to increase when the material web is transferred from the rolled-up state to the unrolled state (i.e. is pulled on the pulling rope) and to decrease accordingly when no or only a small pulling force is applied.

[0024] The limitation of the maximum distance d between the tether connecting element and the traction cable deflection element can be achieved by choosing the length and / or the elasticity of the tether or the elastic element.

[0025] In a further aspect, the extension element can further comprise a tether fastening element. In this case, the tether connecting element is a tether deflection element. The tether is deflected at the tether deflection element and is connected (directly or indirectly) to the tether fastening element. The tether connecting element and the tether fastening element can be arranged such that the tether extends between the tether connecting element and the tether fastening element substantially parallel to the extension element. In particular, the tether connecting element and the tether fastening element can be arranged such that the tether extends at least partially within the extension element. In addition, the elastic element can serve to indirectly fasten the tether to the tether fastening element.The distance between the tether fastening element and the tether connecting element may be fixed.

[0026] In another aspect, the tether fastening element is configured to be movable relative to the tether connecting element and is pretensioned by an elastic element such that the distance d between the tether connecting element and the pull-rope deflection element increases when the material web is transferred from the rolled-up state to the unrolled state (i.e., when the pull-rope is pulled) and decreases accordingly when no or only a slight tensile force is applied. Accordingly, the distance between the tether fastening element and the tether connecting element decreases during unrolling and increases again during rewinding.

[0027] Furthermore, the extension element can have at least a first and a second tether connecting element and optionally at least a first and a second tether fastening element. In this aspect, the system comprises a first and a second tether. The tether connecting elements, pull-cord connecting elements, and optionally the tether fastening elements can be arranged substantially symmetrically, wherein the center of the extension element can form the plane of symmetry.

[0028] As described above, a tensile force applied to the pull cable(s) is / are transmitted by the retaining cable(s) to different points on the extension element. In particular, the first retaining cable is connected to the first retaining cable connecting element and comprises a first pull cable deflection element at an end facing away from the retaining cable connecting element. The first retaining cable is configured such that a distance d between the first retaining cable connecting element and the first pull cable deflection element increases when the material web is transferred from the rolled-up state to the unrolled state. The second retaining cable is connected to the second retaining cable connecting element and has a second pull cable deflection element at an end facing away from the retaining cable connecting element.The second holding cable is configured such that the distance between the second holding cable connecting element and the second traction cable deflection element increases as the material web is transferred from the rolled-up state to the unrolled state. In this aspect of the invention, the traction cable is deflected at the first traction cable deflection element and the second traction cable deflection element. The holding cables thus absorb the tensile force acting on a traction cable.

[0029] In another aspect, the system comprises two traction cables. A first traction cable is then deflected at the first traction cable deflection element, and a second traction cable is deflected at the second traction cable deflection element.

[0030] The maximum distance between the first retaining cable connecting element and the first traction cable deflection element is limited. The maximum distance between the second retaining cable connecting element and the second traction cable deflection element is also limited. Preferably, the maximum distance is selected such that the retaining cables and the traction cable(s) form isosceles triangles (the extension element forms the base) when the material web is transferred from the rolled-up state to the unrolled state.

[0031] At the first (or second) traction cable deflection element, the first (or second) holding cable and the part of the traction cable which is guided from the first (or second) traction cable deflection element in the direction of the extension element can enclose an angle α in the range from 50° to 130°, or in the range from 60° to 120°.

[0032] This triangular arrangement of the holding or tension cables allows for good load distribution within the extension element. This allows for a slim profile for the extension element without causing damage. Furthermore, the extension element is held in as horizontal a position as possible, even when subjected to external loads such as wind loads, or quickly returns to this position.

[0033] In a further aspect, the extension element comprises at least a first and a second traction cable connecting element. If a traction cable is present, the traction cable can be connected to the first traction cable connecting element and the second traction cable connecting element and can be deflected by the first traction cable connecting element and the second traction cable connecting element. If multiple traction cables are provided, a first traction cable can be connected to the first traction cable connecting element and a second traction cable can be connected to the second traction cable connecting element.

[0034] If the system comprises first and second tether attachment elements, the first tether can be connected to the first tether attachment element. In this aspect, the first tether connecting element is a tether deflection element at which the first tether is deflected. Similarly, the second tether can be connected to the second tether attachment element. In this aspect, the second tether connecting element is a tether deflection element at which the second tether is deflected.

[0035] Furthermore, the distance from the first pull rope deflection element to the second pull rope deflection element can be smaller in the rolled up state than in the unrolled state, whereby the distance in the rolled up state is less than 10 cm, or less than 5 cm, or less than 1 cm. This means that sections of the pull rope (or first and second pull ropes) that are pulled to unroll the material web can lie close together in the rolled up state and thus require very little space. This results in a visually appealing appearance. In particular, the pull rope sections / the pull ropes can lie so close together in the rolled up state of the material web that they touch and act like a single strand of rope. When the material web is unrolled, the distance between the pull rope deflection elements increases and the tensile force can be transmitted to multiple points on the extension element.

[0036] In one aspect, the first and / or second tether deflection element is arranged at a medial position of the extension element, and the first and / or second tether fastening element is arranged at a lateral position of the extension element. The deflection element(s) are thus located further inward than the fastening elements. Optionally, the first traction cable connecting element is arranged between the first tether deflection element and the first tether fastening element, and further optionally, the second traction cable connecting element is arranged between the second tether deflection element and the second tether fastening element. In particular, this can result in a substantially symmetrical structure.

[0037] In a further aspect, the system comprises at least one pretensioning element. The pretensioning element can be coupled to the shaft in such a way as to pretension the shaft in an orientation that corresponds to a rolled-up state of the material web. Thus, the material web is rolled up if insufficient tensile force is applied to the at least one pulling cable. The pretensioning element can be a spring, in particular a rotational spring. In another aspect, the pretensioning element can comprise a cable or a belt that wraps around the shaft and is coupled to a weight. In this case, unrolling the material web leads to the weight being raised. By lowering the weight, the material web can be rolled up again.

[0038] The shaft and in particular the pre-tensioning element can be configured such that a tensile stress in the material web during unwinding and / or winding is lower than when the material web is fully tensioned. In other words, during unwinding (and correspondingly during winding up), the material web is not yet fully tensioned. Only after the material web has been fully unrolled (unrolled state of the material web), or the shaft is blocked in an intermediate position (i.e. between the rolled-up state and the unrolled state) to prevent further unwinding, can the material web be fully tensioned by a further pull on the at least one pull cable (or by a tensile force acting on the at least one pull cable).This allows the tension in the material web to be increased after (partial) unwinding, for example to prevent sagging and / or to provide greater stability against external loads, such as wind loads.

[0039] In one aspect, the system can comprise at least one blocking means. The blocking means is configured to block rotation of the shaft when the material web has not yet been completely unrolled. Thus, the material web can be further tensioned even when it is not completely unrolled.

[0040] In one aspect, at least one end of the traction cable, both ends of the traction cable (or one end each of the first and second traction cables) are connected to a traction cable shaft. The traction cable shaft is configured to roll up the traction cable(s). Rolling up the traction cable(s) causes a tensile force to be exerted on the traction cable(s), and the material web is unrolled. The traction cable shaft can be coupled to a hand crank and / or a drive (e.g., comprising an electric motor). This allows manual and / or motorized operation.

[0041] In a further aspect, the system comprises at least one column, which column guides the at least one traction cable. If the system comprises one traction cable, both ends of the traction cable can be guided along the column. If the system comprises multiple traction cables, one end of each of the different traction cables can be guided along the column.

[0042] In one aspect, the column is a telescopic column. The telescopic column comprises at least one, in particular two, fold-out arms. The traction cable is attached, in particular deflected, to the arm(s). The fold-out arm(s) can be configured to be transferred from a folded position to an unfolded position by a tensile force acting on the traction cable. Thus, if a tensile force is exerted on the traction cable (for example, by means of the traction cable shaft), not only is the material web unrolled, but the fold-out arm(s) are also unfolded. This results in the traction cable attached to the arm(s) also being moved outwards from the column. The distance between the traction cable ends or between the first and second traction cables is thus increased during unrolling (by unfolding the arm(s)) and decreased during rewinding (by folding the arm(s)).In particular, the ends of the tension ropes or tension cables can be so close together when the material web is rolled up that they touch each other and act like a single strand of rope. When the material web is unwound, the distance between the ends of the tension ropes or tension cables increases, and the tensile force can be transmitted to multiple points on the extension element.

[0043] In one aspect, the extendable arm is associated with a strut that supports the arm in the extended position. The strut can be supported by a first end on a base body of the telescopic column and can be hinged to the arm by a second end, which is opposite the first end.

[0044] In a further aspect, the arm can be arranged on the column at a first end so that it can be displaced translationally. For example, the base body of the telescopic column can comprise a guide rail that guides a carriage translationally. The arm can thus be arranged on the column by means of a translationally displaceable carriage. Furthermore, the first end of the arm can be connected to the carriage in an articulated manner.

[0045] If there are at least two arms, each of the arms can be connected to a slide by an articulated joint, or the arms can be connected to a slide by an articulated joint.

[0046] A second end of the arm, opposite the first end, can be a free end, whereby the traction cable can be attached to the free end and, in particular, can be deflected there. A deflection element, such as an eyelet or a pulley, can be provided for this purpose.

[0047] In another aspect, the extendable arm is assigned an elastic element that pre-tensions the extendable arm in the retracted position. If the tensile force acting on the traction cable is reduced in order to roll up the material web, the arm (or arms) can be automatically retracted again. The elastic element can be, for example, a spring (tension spring) and / or the like and supports the extendable arm during retraction. This ensures complete retraction. In another aspect, the retraction of the extendable arm occurs solely due to the force of gravity.

[0048] Furthermore, the column can comprise at least one spacer element. The spacer element extends in a direction away from the material web. A counter-tension element (e.g., a counter-tension cable, a rod, a linkage, and / or the like) can also be arranged between the spacer element and the at least one extendable arm. The counter-tension element is arranged such that a tensile force acting on the tension cable can be at least partially absorbed by the counter-tension element and transferred to the spacer element.

[0049] For example, the counter-tension element can be tensioned if at least one foldable arm is extended. When the arm is folded in, the counter-tension cable can be relaxed, retracted, and / or coiled.

[0050] The spacer element, the arms (or at least one arm), and the counter-tension element form a kind of truss. The arm(s) can then serve as the truss compression element(s), and the counter-tension element(s) as the truss tension element(s). The spacer element completes the truss.

[0051] The arm(s) can be designed as metal profiles (particularly aluminum or stainless steel profiles) or as plastic profiles (particularly composite). The counter-tension element(s) can comprise a cable, a rod, a linkage, or the like. In particular, the counter-tension element(s) can be made at least partially of aluminum, steel, stainless steel, or plastic (particularly composite).

[0052] In a further aspect, the spacer element can be arranged on the column so as to be translationally displaceable (for example, by means of a carriage). The carriage can be coupled to the carriage(s) connected to a first end of the arm(s), such that the arm(s) move translationally substantially synchronously with the spacer element. In one aspect, the spacer element is fixed to or integrally formed on at least one carriage, which is connected to a first end of an arm. Likewise, the spacer element can be fixed to or integrally formed on two carriages, each of which is connected to a first end of an arm.

[0053] In a further aspect, the spacer element can be arranged at a height on the telescopic column that essentially corresponds to the height of the first end of the arm when the arm is extended. The force absorption by the spacer element and the at least one counter-tension element allows the at least one arm, and in particular the articulated connection of the arm (as well as the optional slide), to be dimensioned relatively small without fear of damage. This allows for material and cost savings.

[0054] The object is also achieved by a system which comprises a shaft and a material web, wherein the material web is fastened at a first end to the shaft and at a second end to an extension element. The extension element is connected to at least one traction cable, wherein the at least one traction cable is attached to a telescopic column, as described above. The connection can be direct or indirect. For this purpose, traction cable connecting elements (for example eyelets, pulleys and / or the like) can be provided. Likewise, an elastic element (for example a spring element or an elastic cable section) can be provided between the at least one traction cable and the extension element. In a further aspect, the elastic element can be designed integrally with the at least one traction cable.

[0055] In one aspect, the material sheet is a sun sail. The system can thus serve as sun protection, for example, on a terrace or on a ship. In another aspect, the material sheet can be a net that protects plants underneath from sun, hail, or other weather influences.

[0056] In a further aspect, the material web can be substantially rectangular. The material web can, for example, have a length in the range of 1 m to 10 m, or in the range of 2 m to 8 m, or in the range of 3 m to 7 m. For example, the material web is 5 m long. Furthermore, the material web can have a width (measured along the corrugation) in the range of 1 m to 10 m, or in the range of 2 m to 8 m, or in the range of 3 m to 7 m. For example, the material web has a width of 4.5 m. Short description of the characters

[0057] The invention is explained in more detail below with reference to the accompanying figures. They show: Figure 1A is a schematic representation of a first system for winding and unwinding a material web; Figure 1B is a schematic representation of a second system for winding and unwinding a material web; Figure 1C is a schematic representation of a third system for winding and unwinding a material web; Figure 2A is a schematic detailed representation of the cable guide for the holding cable and pulling cable on the extension element when the material web is rolled up; Figure 2B is a schematic detailed representation of the cable guide for the holding cable and pulling cable on the extension element when the material web is unrolled; Figure 2C is a schematic detailed representation of an alternative cable guide for the holding cable and pulling cable on the extension element when the material web is unrolled; Figure 3 is a schematic representation of a material web with an extension element when the material web is rolled up; Figure 4A is a schematic representation of a telescopic column with folded arms;Figure 4B shows a schematic representation of a telescopic column with partially extended arms; Figure 4C shows a schematic representation of a telescopic column with extended arms; Figure 5 shows a schematic plan view of the telescopic column with extended arms; and Figure 6 shows a schematic representation of a fourth system for winding and unwinding a material web. ; Description of the characters

[0058] The Figures 1A , 1B and 1C each show a schematic representation of a system 1 for winding and unwinding a material web 20. The material web 20 can be, for example, a sunshade or a net. The systems 1 differ essentially in the type of column 80 used, which guides a traction cable 60. A shaft 10, the material web 20 as well as the guidance of the holding cables 40, 50 and the traction cable 60 on an extension element 30 of the system 1 is shown in the Figures 1A to 1C systems presented are essentially the same.

[0059] The system 1 comprises a shaft 10 and a material web 20, such as a sunshade or a net. The material web 20 is attached to the shaft 10 by a first end 22. For example, the material web can be attached to the shaft by means of a piping rail, glued to the shaft 10, screwed to the shaft 10, or connected to the shaft 10 in some other way.

[0060] The shaft 10 is rotatable. By rotating the shaft 10, the material web 20 is wound up or unwound. The material web 20 can thus be converted from a wound state to an unwound state by rotating the shaft 20. It is understood that the shaft 10 can be stopped during winding or unwinding, so that the material web 20 can also be wound up or unwound only partially.

[0061] The shaft 10 is coupled to at least one pre-tensioning element 12, 14 (for example, a torsion spring). The pre-tensioning element(s) 12, 14 pre-tension the shaft 10 in an orientation that corresponds to a rolled-up state of the material web 20. Thus, the material web 20 is automatically rolled up or rewound when no tensile force acts on the material web.

[0062] It goes without saying that this is optional. In another variant of the system, pre-tensioning elements can be provided so that the material web is initially unrolled and a force must be applied to the shaft to rewind the material web. For this purpose, the pull cable(s) can be pre-tensioned accordingly, for example.

[0063] A pull-out element 30 is fastened to a second end 24 of the material web, which is opposite the first end 22. The fastening can be effected, for example, via a piping rail, by gluing, screwing and / or the like. In particular, a pocket can be provided at the second end 24, into which the pull-out element 30 can be at least partially inserted. The pull-out element 30 can be an extruded profile and made of plastic and / or metal (particularly aluminum). Likewise, the pull-out element 30 can be, for example, a fiber-reinforced element, e.g., a rod or a tube, or comprise such a fiber-reinforced element.

[0064] The extension element 30, shown schematically here, has a first tether connecting element 34a and a second tether connecting element 34b. A first tether 40 is connected to the first tether connecting element 34a. A second tether 50 is connected to the second tether connecting element 34b.

[0065] In the embodiment shown, the extension element 30 further comprises a first tether fastening element 32a and a second tether fastening element 32b. A first tether 40 is connected at a first end to the first tether fastening element 32a and is deflected at the first tether connecting element 34a, which here is a tether deflection element. At a second end, which faces away from the tether fastening element 32a and the tether connecting element 34a, the first tether 40 comprises a first pull-cord deflection element 44.

[0066] The first tether fastening element 32a can be an eyelet, for example. The first tether shown here is firmly attached to the first tether fastening element 32a (e.g., clamped, screwed, or knotted). From the first tether fastening element 32a, the tether 40 is guided essentially parallel to the second end of the material web 20 to the tether connecting element 34a, which here is a tether deflection element, and deflected there. The tether connecting element 34a can also be an eyelet, or, for example, comprise a roller over which the first tether 40 is guided. The first tether 40 is connected to a traction cable 60 of the system 1 via the traction cable deflection element 44. The traction cable deflection element 44 can, for example, be an eyelet through which the traction cable 60 is guided, or can comprise a roller that guides the traction cable 60.

[0067] A second tether 50 is connected at a first end to the second tether fastening element 32b and is deflected at the second tether connecting element 34b, which here is a tether deflection element. At a second end, which faces away from the tether fastening element 32b and the tether connecting element 34b, the second tether 50 comprises a second traction cable deflection element 54.

[0068] The second tether fastening element 32b can be an eyelet, for example. The second tether shown here is firmly attached to the second tether fastening element 32b (e.g., clamped, screwed, or knotted). From the second tether fastening element 32b, the tether 50 is guided essentially parallel to the second end of the material web 20 to the tether connecting element 34b, which here is a tether deflection element, where it is deflected. The tether connecting element 34b can also be an eyelet, or, for example, comprise a roller over which the second tether 50 is guided. The second tether 50 is connected to the traction cable 60 of the system 1 via the traction cable deflection element 54. The traction cable deflection element 54 can, for example, be an eyelet through which the traction cable 60 is guided, or can comprise a roller that guides the traction cable 60.

[0069] The pull cable 60 is guided from the column 80 to the extension element 30. Pulling on the pull cable 60 causes the material web to be unwound. The extension element 30 has a first pull cable connecting element 36a and a second pull cable connecting element 36b. Here, the pull cable is guided from the column 80 to the first pull cable connecting element 36a and deflected there. The pull cable 60 then runs essentially parallel to the second end 24 of the material web to the second pull cable connecting element 36b. At the second pull cable connecting element 36b, the pull cable 60 is deflected again and guided back to the column 80. Instead of a single pull cable 60, two separate pull cables (not shown) can also be used. In this case, one pull cable can be firmly attached to the pull cable connecting element 36a or 36b.

[0070] The Figures 1A to 1Cshow the material web 20 in the unrolled state. In this state, as well as during unrolling, the holding cables and the pulling cable form a so-called force triangle. A first force triangle is spanned between the first pulling cable deflection element 44, the first holding cable connecting element 34a and the first pulling cable connecting element 36a. The distance between the first holding cable connecting element 34a and the first pulling cable connecting element 36a is determined by the extension element 30. The distance between the pulling cable deflection element 44 and the first holding cable connecting element 34a is variable, as described in detail with reference to the Figures 2A and 2B is explained.

[0071] A second force triangle is spanned between the second traction cable deflection element 54, the second tether connecting element 34b, and the second traction cable connecting element 36b. The distance between the second tether connecting element 34b and the second traction cable connecting element 36b is also determined by the extension element 30. The distance between the traction cable deflection element 54 and the second tether connecting element 34b is variable.

[0072] Furthermore, the holding cables 40, 50 each comprise an elastic element 42, 52. This allows the distance between the holding cable connecting element 34a, 34b and the corresponding traction cable deflection element 44, 54 to increase or decrease.

[0073] A tensile force applied to the traction cable 60 is partially transferred to the first 40 or second holding cable 50 at the traction cable deflection element 44 or 54 and thus transferred to the extension element via the traction cable and the corresponding holding cable.

[0074] In the Figure 1a In the system shown, the traction cable 60 is guided by a column 80, which is a telescopic column. The column comprises a first and a second extendable arm 82a, 82b. The operation of the column is described in detail in the Figures 4A to 4C described. In addition, a traction cable shaft 70 is arranged on the column. By rotating the traction cable shaft, the traction cable 60 can be wound up, thus applying a tensile force to the traction cable. At least one end of the traction cable 60 is connected to the traction cable shaft. However, both ends of the traction cable can also be connected to the traction cable shaft.

[0075] In Figure 1BA system is shown whose column 80 has only one extendable arm 82a. The system, which in Figure 1C The column 80 shown has a conventional column 80 without extendable arms. It is understood that the pull cable 60 can also be guided along other structures, such as a house wall, a post, a tree, and / or the like.

[0076] The Figures 2A and 2B show a schematic detailed representation of the cable guide of the holding cable 40 and the pulling cable 60 on the extension element 30. In Figure 2Athe material web is in the rolled-up state and no or a very low tensile force F acts. In this state, a distance d between the holding cable connecting element 34a and the corresponding pull cable deflection element 44 is small. In one aspect, the holding cable connecting element 34a and the corresponding pull cable deflection element 44 can touch. In the section between the pull cable connecting element 36a and the holding cable connecting element 34a, the pull cable 60 and the holding cable 40 can then run essentially parallel. In the rolled-up state of the material web, the pull cable 60 and the holding cable 40 therefore run very close to the extension element 30. In one aspect, the holding cable 40 can run at least partially within the extension element 30. The distance x between the holding cable connecting element 34a and the pull cable connecting element 36a is fixed and determined by the extension element 30. In the Figure 2AIn the rolled-up state shown, the elastic element (e.g. a spiral spring or an elastic rope) is relaxed.

[0077] Now, as in Figure 2B When a tensile force F is exerted on the traction cable 60, the elastic element 42 becomes tense (it becomes longer), and the distance d between the holding cable connecting element 34a and the corresponding traction cable deflection element 44 increases, forming a force triangle. Thus, the tensile force can be transmitted to different points on the extension element 30 (here, corresponding to the position of the holding cable connecting element 34a and the traction cable connecting element 36a).

[0078] In the illustration shown, the maximum distance d has been reached. The resulting force triangle is essentially isosceles. At the traction cable deflection element 44, the holding cable 40 and the portion of the traction cable 60 that is guided between the traction cable deflection element 44 and the traction cable connecting element 36a form an angle α in the range of 50° to 130°, or in the range of 60° to 120°. In the example shown, α is approximately 80°. An angle α of approximately 120° is particularly preferred.

[0079] Figure 2C shows a variant of the cable guide. Here, the retaining cable 40 is connected to the retaining cable fastening element 32a. However, the retaining cable fastening element 32a is mounted so that it can move (in particular, translationally) and can be pretensioned via the elastic element 42 (for example, a coil spring). The retaining cable 40 can be non-elastic in this example.

[0080] According to a further variant, the tether can be deflected on the extension element before being connected to a tether fastening element. This allows the tether and / or an elastic element (which elastic element can be part of the tether or connected to it) to be made longer. This allows for a greater elongation (relative change in length) of the elastic element or tether, respectively.

[0081] Figure 3 shows again the pull-out element 30 and the shaft 10, which have already been shown in detail with reference to Figure 1Adescribed. As shown here, the material web 20 is completely rolled up and no or very little tensile force acts on the traction cable 60. Accordingly, the distance between the holding cable connecting element 34a and the corresponding traction cable deflection element 44, as well as the distance between the holding cable connecting element 34b and the corresponding traction cable deflection element 54, is small. This means that the two traction cable deflection elements 44, 54 are also very closely spaced. The traction cable strands 62, 64, which run away from the extension element, can thus be guided essentially parallel and closely spaced. The system is therefore very space-saving when rolled up.

[0082] The Figures 4A , 4B and 4Cshow a schematic representation of a telescopic column 80 with two extendable arms 82a, 82b. The functional principle described here is analogous to telescopic columns with only one extendable arm, as is the case, for example, in Figure 1B is shown.

[0083] In Figure 4A The telescopic column is shown with folded arms 82a, 82b. The traction cable strands 62, 64, which extend from the free ends 82a2, 82b2 of the arms 82a, 82b in the direction of the material web, are located close together (the distance is small). In this state, no or only a small tensile force acts on the traction cable 60 (or the traction cable strands 62, 64). The illustration from Figure 4A corresponds to the rolled-up state of the material web. Figure 4B the arms 82a, 82b are partially unfolded and in Figure 4C fully unfolded. The state in Figure 4C corresponds to the unrolled state of the material web. Here, the tension cable strands 62, 64 are widely spaced from each other.

[0084] To apply a tensile force to the traction cable 60, at least one end of the traction cable 60 is connected to a traction cable shaft 70. The traction cable shaft 70 is configured to wind up the traction cable 60. A hand crank and / or a drive (in particular an electric motor) can be provided for this purpose.

[0085] A tensile force applied to the traction cable 60 causes the material web to unwind and the arms 82a, 82b of the telescopic column 80 to unfold. A strand 62, 64 of the traction cable 60 is guided or attached to the free ends 82a2, 82b2 of the foldable arms 82a, 82b. The foldable arms 82a, 82b are designed to be folded from a retracted position (see Fig. 4A ) into an unfolded position (see Fig. 4C) to be transferred. In order to stabilize the unfolded arms 82a, 82b and to be able to better dissipate the tensile forces exerted by the traction cable 60, a counter-traction element 90 can be attached to each of the arms 82a, 82b, as shown in Figure 5 is shown.

[0086] As in the Figures 4A to 4C As shown, the traction cable 60 (or two separate traction cables) is guided from the free ends 82a2, 82b2 along the arms 82a, 82b. In the region of an end 82a1, 82b1 opposite the free end, the traction cable 60 is deflected and guided toward the upper end of the column 80. There, it is deflected again and guided toward the traction cable shaft 70.

[0087] Each extendable arm 82a, 82b is associated with a strut 84a, 84b. This strut 84a, 84b supports the associated arm 82a, 82b in the extended position. The strut 84a is hinged to the arm 82a on a first side and to the column 80 on a second side. The strut 84b is hinged to the arm 82b on a first side and to the column 80 on a second side.

[0088] The respective first end 82a1, 82b1 of the arms 82a, 82b is arranged on the column 80 so that it can be moved translationally. For example, the end 82a1, 82b1 can be pivotally connected to a translationally movable carriage 86a, 86b, which is guided by a slide rail (not shown) of the column 80. The carriages 86a, 86b can be coupled so that they move up and down together. This ensures that the arms 82a, 82b fold out and in together.

[0089] Instead of two slides 86a, 86b, a single slide can also be used. In one embodiment, this slide can at least partially encompass the base body of the column and thus be moved up and down.

[0090] This arrangement of arm 82a, 82b, strut 84a, 84b and pull cable 60 results in a tensile force on the pull cable 60 causing the arms 82a, 82b to fold out.

[0091] In particular, each extendable arm 82a, 82b can be assigned an elastic element (e.g., a spring) that preloads the extendable arm 82a, 82b in the retracted position. The arm 82a, 82b thus returns to the retracted position when no (or only a slight) tensile force acts on the traction cable(s). In another aspect, the arms 82a, 82b can return to the retracted position due to the force of gravity when no (or only a slight) tensile force acts on the traction cable(s).

[0092] Figure 5shows a schematic plan view of a telescopic column 80. The telescopic column comprises a first arm 82a and a second arm 82b. These are shown in the unfolded state. The arms 82a, 82b are each articulated to a carriage 86a, 86b, wherein the carriages are mounted on the base body of the column 80 for translational displacement. In addition, the arms 82a, 82b are supported by struts 84a, 84b. In order to optimally transmit a tensile force acting on the traction cables or the traction cable strands 62, 64 to the telescopic column 80, a spacer element 92 is arranged on the telescopic column 80 (in particular on a side of the telescopic column 80 facing away from the material web). The spacer element 92 can be fixed or mounted on the base body of the column 80 for translational displacement. For this purpose, a slide can be provided with which the spacer element 92 is fixed.This carriage can also be coupled to the carriages 86a, 86b, so that the spacer element 92 moves up and down the column in translation, essentially synchronously with the arms 82a, 82b. Likewise, the spacer element 92 can be fixed to at least one of the carriages 86a, 86b or be formed integrally.

[0093] The spacer element 92 extends in the direction away from the material web. In particular, the spacer element 92 is arranged at a height on the telescopic column 80 that essentially corresponds to the height of the first ends 82a1, 82b1 of the arms 82a, 82b when they are unfolded.

[0094] A counter-tension element 90 is attached and / or deflected to the spacer element 92 and is connected to the free ends 82a2, 82b2 of the arms 82a, 82b. The counter-tension element 90 is preferably connected to the free end 82a2, 82b2 of the arm 82a, 82b at a location opposite the corresponding traction cable strand 62, 64.

[0095] A part or strand 90a of the counter-tension element (in particular a counter-tension cable) 90 can thus absorb a tensile force applied by the tension cable strand 62 to the arm 82a and divert it in the direction of the spacer element 92 and thus to the column 80. Accordingly, a part or strand 90b of the counter-tension element (in particular a counter-tension cable) 90 can absorb a tensile force applied by the tension cable strand 64 to the arm 82b and divert it in the direction of the spacer element 92 and thus to the column 80. Instead of one counter-tension element, two separate counter-tension elements or a multi-part counter-tension rod assembly can be provided. The force absorption by the counter-tension element 90 makes it possible to dimension the arms 82a, 82b, and in particular the articulated connection between the arms 82a, 82b and the corresponding carriages, relatively small without having to fear damage.

[0096] Figure 6shows a system which comprises a shaft 10 and a material web 20. The material web 20 is fastened to the shaft 10 at a first end 22. The material web 20 is fastened to an extension element 30 at a second end 24. The extension element 30 is in turn connected to at least one pull cable 60a, 60b. The connection can be direct or indirect. For this purpose, pull cable connecting elements 36a, 36b (for example, eyelets, pulleys and / or the like) are provided. Likewise, an elastic element (not shown here, for example a spring element) can be provided between the at least one pull cable 60a, 60b and the extension element 30. A tensile force applied to the pull cable 60a, 60b causes the material web 20 to unwind. The system further comprises a telescopic column 80 with fold-out arms 82a, 82b, as described with reference to Fig. 4A-Cdescribed. Since the arms fold in when no tensile force is acting (for example due to the force of gravity, or due to pretensioning by a corresponding elastic element, such as a spring), i.e. when the material web 20 is rolled up, the two tension cables 60a, 60b lie close together in the rolled-up state, thus providing a visually appealing and space-saving solution. List of reference symbols

[0097] 1System 10Shaft 12Pre-tensioning element 14Pre-tensioning element 20Material web (e.g. sun sail) 22First end 24Second end 30Extension element 32aFirst tether fastening element 32bSecond tether fastening element 34aFirst tether connecting element (tether deflection element) 34bSecond tether connecting element (tether deflection element) 36aFirst traction cable connecting element 36bSecond traction cable connecting element 40First tether 42Elastic element 44Traction cable deflection element 50Second tether 52Elastic element 54Traction cable deflection element 60Traction cable 60aTraction cable 60bTraction cable 62Traction cable strand 64Traction cable strand 70Traction cable shaft 80Column 82aArm 82bArm 82a1first end 82b1first end 82a2free, second end 82b2free, second end 84aStrut 84bStrut 86aSlide 86bSlide 90Counter-tension element 90aStrut 90bStrut 92Spacer element dDistance xDistance FTensile force

Claims

1. System (1) for rolling up and unrolling a material web (20), in particular a sun sail (1), the system (1) comprising a shaft (10) and a material web (20), wherein the material web (20) is fastened to the shaft (10) with a first end (22), and wherein the shaft (10) is rotatably arranged and the material web (20) can be transferred from a rolled-up state to an unrolled state by rotating the shaft (20); wherein the system (10) further comprises at least one pull-out element (30), which pull-out element (30) is fastened to a second end (24) of the material web (20), which second end (24) is opposite the first end (22), wherein the pull-out element (30) has at least one holding cable connecting element (34a, 34b) and at least one pulling cable connecting element (36a, 36b), wherein the system (1) further comprises a pulling cable (60) and at least one holding cable (40, 50), wherein the holding cable (40, 50) is connected to the holding cable connecting element (34a,34b) and comprises a traction cable deflection element (44, 54) at an end facing away from the holding cable connecting element (34a, 34b) and is designed such that a distance (d) between the holding cable connecting element (34a, 34b) and the traction cable deflection element (44, 54) increases when the material web (20) is transferred from the rolled-up state to the unrolled state, wherein the traction cable (60) is deflected at the traction cable deflection element (44, 54) and is connected to the traction cable connecting element (36a, 36b) in order to transmit a tensile force acting on the traction cable to the extension element (30) and to transfer the material web (20) from the rolled-up state to an unrolled state.

2. System according to claim 1, wherein the at least one holding cable (40, 50) comprises an elastic element (42, 52) and / or is connected to the extension element (30) via an elastic element.

3. System according to claim 1 or 2, wherein the extension element (30) further comprises a tether fastening element (32a, 32b) and wherein the tether connecting element (34a, 34b) is a tether deflection element (34a, 34b), wherein the tether (40, 50) is connected to the tether fastening element (32a, 32b) and is deflected at the tether deflection element (34a, 34b).

4. System (1) according to one of claims 1 to 3, wherein the extension element (30) has a first and a second tether connecting element (34a, 34b) and optionally at least a first and a second tether fastening element (32a, 32b), wherein the system (1) comprises a first and a second tether (40, 50), wherein the first tether (40) is connected to the first tether connecting element (34a) and comprises a first traction cable deflection element (44) at an end facing away from the tether connecting element (34a) and is configured such that a distance (d) between the first tether connecting element (34a) and the first traction cable deflection element (44) increases when the material web (20) is transferred from the rolled-up state to the unrolled state,and wherein the second holding cable (50) is connected to the second holding cable connecting element (34b) and comprises a second traction cable deflection element (54) at an end facing away from the holding cable connecting element (34b) and is configured such that a distance between the second holding cable connecting element (34b) and the second traction cable deflection element (54) increases when the material web (20) is transferred from the rolled-up state to the unrolled state, and wherein the traction cable (60) is deflected at the first traction cable deflection element (44) and the second traction cable deflection element (54), or wherein a first traction cable is deflected at the first traction cable deflection element (44) and a second traction cable is deflected at the second traction cable deflection element (54).

5. System according to one of claims 1 to 4, wherein the pull-out element (30) has at least a first and a second traction cable connecting element (36a, 36b), wherein the traction cable (60) is connected to the first traction cable connecting element (36a) and the second traction cable connecting element (36b) and is deflected by the first traction cable connecting element (36a) and the second traction cable connecting element (36b), or wherein the first traction cable is connected to the first traction cable connecting element (36a), and wherein the second traction cable is connected to the second traction cable connecting element (36b).

6. System according to one of claims 1 to 5, wherein a distance from the first traction cable deflection element (44) to the second traction cable deflection element (54) in the rolled-up state is smaller than in the unrolled state, wherein the distance in the rolled-up state is smaller than 10 cm, or smaller than 5 cm or smaller than 1 cm.

7. System according to one of claims 3 to 6, wherein the first and / or second tether deflection element (34a, 34b) is arranged at a medial position of the extension element (30) and wherein the first and / or second tether fastening element (32a, 32b) is arranged at a lateral position of the extension element (30), and wherein optionally the first traction cable connecting element (36a) is arranged between the first tether deflection element (34a) and the first tether fastening element (32a) and wherein further optionally the second traction cable connecting element (36b) is arranged between the second tether deflection element (34b) and the second tether fastening element (32b).

8. System according to one of claims 1 to 7, wherein the system comprises at least one pretensioning element (12, 14), which pretensioning element (12, 14) is coupled to the shaft (10) and pretensions the shaft in an orientation corresponding to a rolled-up state of the material web, and wherein optionally the shaft (10), and in particular the at least one pretensioning element (12, 14), is configured such that a tensile stress in the material web during unwinding and / or rolling up is lower than in a fully tensioned state of the material web (20), wherein the fully tensioned state can be achieved by a tensile force acting on the at least one tension cable, which acts when the material web is in the unrolled state or in an intermediate position, in which intermediate position the shaft is blocked to prevent further unrolling.

9. System according to one of claims 1 to 8, wherein at least one end of the traction cable (60) is connected to a traction cable shaft (70), which traction cable shaft (70) is adapted to roll up the traction cable (60), wherein the traction cable shaft (70) is optionally coupled to a hand crank and / or a drive.

10. System according to one of claims 1 to 9, further comprising at least one column (80), which column (80) guides the at least one traction cable (60), wherein the column (80) is optionally a telescopic column which comprises at least one fold-out arm (82a, 82b) to which the traction cable (60) is attached, wherein the fold-out arm (82a, 82b) is adapted to be transferred from a folded position into an unfolded position by a tensile force acting on the traction cable.

11. System according to claim 10, wherein the extendable arm (82a, 82b) is associated with a strut (84a, 84b), which strut (84a, 84b) supports the arm in the extended position.

12. System according to claim 10 or 11, wherein the arm (82a, 82b) is arranged at a first end (82a1, 82b1) on the column (80) in a translationally displaceable manner, and wherein a second end, which is opposite the first end, is a free end, wherein the traction cable (60) is attached to the free end, and wherein optionally the arm (82a, 82b) is arranged on the column (80) by means of a translationally displaceable carriage (86a, 86b).

13. System according to claim 12, wherein the foldable arm (82a, 82b) is associated with an elastic element which biases the foldable arm (82a, 82b) in the folded position.

14. System according to one of claims 10 to 13, wherein the column (80) comprises at least one spacer element (92), which spacer element (92) extends in a direction pointing away from the material web (20), and wherein a counter-tension element (90) is arranged between the spacer element (92) and the at least one foldable arm (82a, 82b) so that a tensile force acting on the traction cable (60) can be at least partially absorbed by the counter-tension element (90) and transmitted to the spacer element (92), and wherein optionally the spacer element (92) is arranged on the column (80) so as to be translationally displaceable, in particular by means of a carriage (86a, 86b).

15. System according to one of claims 1 to 14, wherein the material web (20) is a sun sail or a net, and / or wherein the material web (20) is substantially rectangular.

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