Toboggan with braking and steering function

Abstract

The invention relates to a toboggan (1), having a first runner (2) and a second runner (3), a seat (4), at least one frame part (5), which connects the runners (2, 3) and optionally supports the seat (4), and a hand-operable braking and steering device (6), which has a first control cable portion (7) and a second control cable portion (8), each control cable portion (7, 8) being connected to its own wing (9), the wings (9) being arranged approximately in the travel direction and being able to engage with a roadway by actuation of the control cable portions (7, 8) for braking and / or steering, the control cable portions (7, 8) being operable at a front side (10) of the toboggan (1) and the wings (9) being arranged in a rear-side region (11) of the toboggan (1). According to the invention, the wings (9) are mounted rotatably and deploy upon actuation by the associated control cable portion (7, 8). The invention also relates to a braking and steering device (6) for a toboggan (1) of this type.

Description

[0001] Sled with braking and steering function

[0002] Technical area

[0003] The invention relates to a sled, comprising a first runner and a second runner, a seat, at least one frame part which connects the runners and optionally carries the seat, and a manually operable braking and steering device which has a first cable pull section and a second cable pull section, wherein each cable pull section is connected to a respective wing, wherein the wings are approximately in the direction of travel and can be brought into engagement with a roadway for braking and / or steering by actuating the cable pull sections, wherein the cable pull sections can be actuated on a front side of the sled and the wings are arranged in a rear region of the sled.

[0004] Furthermore, the invention relates to a manually operable braking and steering device for such a carriage.

[0005] State of the art

[0006] For a long time, sleds were primarily used as a means of transport, but nowadays they are mainly used as winter sports equipment. Sleds are usually designed with two runners that run essentially parallel and have a coating on the underside that allows them to glide easily over snow and / or ice-covered surfaces. The runners are fixed to a frame section so that the runners remain positioned relative to each other. The frame section is usually designed to also support a seat for one or more people. With simply designed sleds, the rider brakes by placing one or both feet against the road surface to achieve the desired braking effect. By placing just one foot or both feet with different levels of force, a steering movement can also be initiated.A steering movement can also be initiated by pulling one end of the sled in the desired direction with your hands while traveling. If the sled is equipped with a rope for pulling it, this rope can also be used for a steering movement during a downhill ride, possibly by simultaneously placing a foot.

[0007] It is understood that such sleds require a relatively high level of physical effort to set a desired travel speed and direction. Furthermore, there is a certain risk of injury, particularly when braking, especially on hard surfaces. Attempts have therefore already been made to equip simply designed sleds with braking and steering devices to facilitate braking and / or steering. For example, the document DE 20 2019 106 821 U1 describes a sled having a braking device located in a rear region of the sled on each runner, which braking device acts via a lever and can engage with a sliding surface, in particular a snow-covered roadway. The lever-like brake can be activated via a handle section placed in front of the upper body of a person riding.

[0008] Alternative braking devices are also known from the prior art, for example from document EP 3 290 291 A1, which has a relatively complex braking unit designed to engage with a roadway. Other known devices, for example those from US 1,299,338, US 9,53,656, US 336,274, DE 202004 002 437 U1, DE 617630 C or DE 353841 C, also have the disadvantage that the corresponding braking systems are structurally complex. Most of these systems also require a return element such as a spring to return a brake to its original position when the braking effect is not desired. Some braking devices can also become obstructed or blocked by ice and / or snow, which can lead to insufficient return.

[0009] Description of the invention

[0010] This is where the invention comes in. The object of the invention is to provide a sled of the type mentioned above, which is equipped with a simple yet highly efficient braking and steering system.

[0011] A further aim of the invention is to provide a braking and steering device suitable for this purpose.

[0012] The object of the invention is achieved if, in a slide of the type mentioned at the beginning, the wings are rotatably mounted and open when actuated by the associated cable pull section.

[0013] A sled according to the invention has the advantage that it is designed with a particularly simple braking and steering device, which nevertheless delivers the desired performance in use, both in terms of braking effect and steering efficiency. By rotatably mounting the wings in a rear area of ​​the sled and folding them out, for example, towards an outer side of the sled, a braking effect can be achieved with relatively little effort. Steering can also be made very easy. By actuating a cable pull section in front of the upper body of a person riding, the corresponding wing is brought into contact with the ground, usually a snowy road, so that the desired braking effect and / or a change of direction occurs.The wings are typically flat and mounted on a rotational axis that runs at an angle to the ground, maximizing braking effect. The cable sections are accessible from the front of the sled, with the front being defined as everything in front of the rider's upper body in the direction of travel.

[0014] A further advantage is that the manually operated braking and steering system can be designed without a return spring. Although a return spring, such as a torsion spring, can be provided for this purpose, this is not required. Typically, the wings are aligned along a longitudinal axis of the associated runners during travel and engage minimally with the ground or snow-covered roadway. Thus, even without a return spring, the wings return to their neutral position (no significant braking or steering effect). The wings thus return to the neutral position automatically.

[0015] The wings can be arranged so that they fold toward the center of the sled when viewed from the runners, or they can fold downwards. However, the wings are preferably arranged so that they open toward the outside of the sled, which is more efficient, especially for steering.

[0016] Advantageously, the first runner and the second runner are each hollow, and the cable pull sections are partially guided in the runners along a direction from the front of the carriage to a rear of the carriage. This initially results in particularly simple guidance of the cable pull sections. In principle, no further guides or attachment points are required for the cable pull sections if hollow runners are used for them. A further advantage arises from the fact that the runners can be manufactured very easily, in particular from an extruded profile of an alloy, in particular an aluminum alloy. The runners can then be bent accordingly and cut to length at the ends. Furthermore, the corresponding attachment points for mounting the wings can be designed using simple operations such as laser cutting, as will be explained later.The individual cable pull sections can be connected to each other at the front of the sled, thus in front of the upper body of a person riding. In this case, there is one cable pull that is connected to both wings, both the one mounted on the first runner and the one mounted on the second runner. In particular, this can then be a single cable pull. However, it is preferably provided that there are two separate cable pulls: a first cable pull for the first runner and the first wing, and a second cable pull for the second runner and the second wing.

[0017] The cable pull(s) are preferably made of steel wire surrounded by a plastic sheath. The sheath can be attached at specific points along the guide to provide strain relief.

[0018] It is advisable that the wings are designed to be mirror-symmetrical in order to achieve the same braking and / or steering effect on both sides of the sled.

[0019] It is particularly preferred that the wings are arranged at one end of the runner. This firstly facilitates simple attachment of the wings. Furthermore, effective braking and steering can be achieved by attaching the wings to one end of the runners. Furthermore, attaching the wings in an end region of the runners also makes it easier to design the carriage with the braking and steering device, as the runners can be equipped with corresponding receptacles for a rotation axis of the wings during production. Furthermore, the risk of displacement or blockage at the end of the runner is significantly lower than in other areas along a runner. Furthermore, the braking and steering device does not take up any space during travel. This also means that the braking and steering device is less susceptible to damage by a driver.The wings are preferably formed with an upper edge and a lower edge, wherein the lower edge has a first region with teeth and a second region which is essentially straight. The first region with teeth serves to engage with the road surface when it is icy. The teeth then create a claw-like grip in the hard surface. In soft snow conditions, however, such as in spring, the teeth are less effective. In this case, the essentially straight region is used or the wing is brought into contact or engagement with the soft ground over a longer distance and with a larger engagement surface. For this purpose, it is expedient for the wings to be approximately V-shaped on the underside towards the bottom.In this context, it is also advantageous if the wings are mounted on a pivot axis which is inclined forward in the direction of travel at an angle to the roadway, preferably at an angle between the roadway or a runner sliding surface and the pivot axis of 30° to 85°, in particular 40° to 75°. With the appropriate features, the following advantages arise when driving: If the sled is moved straight down without the braking and steering system being actuated, the wings automatically position themselves in the direction of travel, i.e. in the longitudinal direction of the runners. Due to their V-shaped design, the wings then only slightly touch the ground in the area of ​​the lower edge, namely with the end of the V-shaped design. The wings are mounted accordingly in terms of height. The resulting braking effect is negligible, but in return it ensures that no automatic restoring force is required, for example from a spring.Rather, the wings automatically position themselves in the direction of travel when the braking and steering system is not actuated. If the braking and steering system is operated manually while driving, the corresponding cable pull rotates the actuated wing around the axis of rotation towards the outside of the sled. Due to the angled position of the axis of rotation and the V-shaped design, the side of the V-shaped design of the lower edge that is closer to the runner engages first. This is the area where the spikes are located. On an icy road surface, a braking or steering effect is then achieved. On the other hand, in soft conditions, for example on muddy ground, the inner spikes of the first area also initially engage with the road surface, but have no noticeable effect.Therefore, an applied tensile force ensures that the blade is moved further forward around the rotation axis, so that the second, essentially straight section, positioned to the outside, engages. The blade is thus immersed further into the road surface, providing the desired engagement in soft ground conditions to achieve a braking and / or steering effect. Thus, in the corresponding designs, the blades are designed to achieve the desired effects even in a variety of ground conditions.

[0020] In order to maximize braking effect and to achieve a certain level of splash protection, particularly in soft snow conditions, it can also be provided that the wings are each mounted on a pivot axis which is inclined outwards, transversely to the direction of travel, preferably at an angle of 1° to 25°, in particular 2° to 15°. As a result, when the wing is folded out to the side, preferably outwards, and also forwards, it is angled more steeply to the direction of travel, so that rising snow spray at least partially bounces off the wing. For this purpose, it can also be provided that the wing is formed with a projection on the upper edge which extends in the direction of travel. This can serve as additional splash protection on soft road surfaces.

[0021] The braking effect can be maximized through a double axis inclination: the greater the angle of inclination to the roadway or a runner sliding surface and the greater the angle of inclination in relation to a vertical axis of the carriage, the greater the braking effect for a given wing size. The wing size determines the braking effect via an engagement surface. The functional properties of the braking and steering device can thus be determined through a substantially flat design of the wings and the double axis inclination. It is particularly preferred that the wings each have a recess in which a deflection pulley is mounted, and that the cable pull sections each run through the recess and around the deflection pulley and are then fixedly attached to the carriage, in particular the runner, in the opposite direction.This reduces the force required, similar to a pulley system, so that braking and / or steering can be achieved with minimal effort. On the other hand, this also makes the system more sensitive, improving the quality of the braking and steering system.

[0022] The wings can be positioned such that the lowest point of the lower edge of the wing is approximately at the level of a skid gliding surface. If the wings are V-shaped at a lower edge facing the roadway, they can be positioned such that a V-shaped projection is in loose contact with the roadway. This results in the aforementioned automatic resetting of the wings when the braking and steering device is not or will not be actuated. Thus, although this is not mandatory, the braking and steering device can be designed without a return spring. If not actuated, the wings may strike the ground or roadway due to gravity; however, this has no significant braking effect and instead basically aligns the wings in the direction of travel.

[0023] The braking and steering system can be equipped with anti-theft protection, such as a padlock that can be inserted through or around both wings to lock them and prevent the carriage from being stolen. Alternatively, a security device can also be installed on the cable sections.

[0024] The further object of the invention is achieved by a manually operable braking and steering device for a carriage according to the invention, wherein the braking and steering device has a cable pull section with a first end and a second end and a wing with a recess and a deflection pulley mounted therein, wherein the cable pull section can be guided around the deflection pulley, as well as a rotation axis which rotatably receives the wing, and a fastening for the second end of the cable pull section, wherein the first end is kept free.

[0025] Such a braking and steering device has the advantage of being simple in design yet highly effective in braking and / or steering a sled. In particular, the braking and steering device can also be retrofitted into existing systems. While the braking and steering device has been explained above in general terms in connection with the sled, it is understood that the corresponding features can be present in a braking and steering device according to the invention, in particular the described V-shaped design on the respective lower edge of the wings and the double axis inclination of the rotation axis.

[0026] Brief description of the invention

[0027] Further features, advantages, and effects of the invention will become apparent from the following exemplary embodiment. Reference is made to the drawings, which show:

[0028] Fig. 1 shows a carriage in a side view;

[0029] Fig. 2 shows the carriage from Fig. 1 in a plan view;

[0030] Fig. 3 a braking and steering device, attached to a skid, in a partial section;

[0031] Fig. 4 to Fig. 6 perspective views of one end of a runner with attached braking and steering device;

[0032] Fig. 7 is an end view of a carriage;

[0033] Fig. 8 shows a section in an end region of the carriage;

[0034] Fig. 9 shows a further section through part of a braking and steering device;

[0035] Fig. 10 is a side view of a carriage with actuated braking and steering device;

[0036] Fig. 11 is a plan view of the carriage according to Fig. 10;

[0037] Fig. 12 is an end view of the carriage according to Fig. 11; Fig. 13 to Fig. 15 are various perspective views of a braking and steering device in the actuated state.

[0038] Ways to implement the invention

[0039] A carriage 1 according to the invention is shown in more detail in Fig. 1 to Fig. 9. The carriage 1 comprises a braking and steering device 6. In Fig. 1 to Fig. 9, the braking and steering device 6 is in a non-actuated state.

[0040] In Fig. 1, the sled 1 is shown in a side view, and in Fig. 2 in a top view. The sled 1 has, as can be seen in Fig. 2, a first runner 2 and a second runner 3. The two runners 2, 3 are arranged along a direction of travel, indicated by an arrow in Fig. 2. The runners 2, 3 are, for example, rigid and, when in use, rest on a surface 27 or a roadway. For this purpose, the runners 2, 3 are suitably designed on their underside so that the runners can slide on a surface 27. In the area of ​​a front side 10 of the sled 1, the two runners 2, 3 are bent upwards, as can be seen in particular from Fig. 1. The runners 2, 3 can also, as can be seen in Fig. 2, converge towards one another in the front area of ​​the sled 1, although this is not mandatory. The two runners 2, 3 are each connected to a frame part 5, so that the two runners 2, 3 are rigidly fixed relative to each other.This completes the basic design of the sled 1. The frame part 5 also supports a seat 4, which serves as a seat for one person. The seat 4 can also be designed to accommodate two people, or even more if necessary.

[0041] The two runners 2, 3 are advantageously formed from a profile made of an aluminum alloy. The aluminum profile can be produced, in particular, by extrusion. Corresponding straight profiles can then be cut to length and bent to form the actual runners 2, 3. The two runners 2, 3 are then hollow. At one end, the runners 2, 3 can also be formed by laser machining with a receptacle 25 for a rotation axis 22, which will be explained later.

[0042] The carriage 1 has a braking and steering device 6, as can be seen in various views and sections in Fig. 3 to Fig. 9; in Fig. 2, the braking and steering device 6 is shown for the first runner 2, whereas the second runner 3 is shown without a braking and steering device 6. The braking and steering device 6 initially comprises a first cable pull section 7 and a second cable pull section 8, which are indicated in Fig. 2. Each cable pull section is connected to a wing 9, as can be seen in Fig. 3. The wing 9 is arranged in a rear region 11 of the carriage 1. In particular, the wing 9 can be arranged on a runner end 13, as can be seen in Fig. 3 or Fig. 4 to Fig. 6. Each wing 9 is mounted on an associated pivot axis 22. The pivot axis 22 is arranged on a runner end 13.For this purpose, the respective runner 2, 3 can be subjected to laser processing during production, so that two receptacles 25 are formed on an upper side of the runners 2, 3 and on the underside of the runners 2, 3 for fixing the axis of rotation 22. The receptacles 25 are particularly visible in Fig. 1 for the second runner 3, which is shown without braking and steering device 6. The wing 9 is provided with a corresponding bore so that the wing 9 can be rotatably mounted on the axis of rotation 22. The rotatability of the wing 9 is designed such that the wing 9 can fold outwards in the direction of travel towards an outer side 12, i.e. towards the right-hand side in the illustrations according to Fig. 4 and Fig. 6.

[0043] As can be seen from Fig. 5 and in particular Fig. 6, a wing 9 has an upper edge 14 and a lower edge 15. The lower edge 15 is approximately V-shaped towards the roadway or a subsurface 27, which is particularly evident in the section according to Fig. 3. A first region 17 of the wing 9, which is adjacent to the axis of rotation 22, has prongs 16 on the base. A second region 18, which is adjacent to the first region, is straight. On the upper edge 14 of the wing 9 there is a projection 19 which extends approximately perpendicular to the rest of the body of the wing 9.

[0044] From Fig. 7 and Fig. 8 it can be seen that the wing 9 is inclined in two ways. Firstly, as can be seen from Fig. 7, the wing 9 is slightly inclined relative to a vertical axis of the carriage 1 (perpendicular to the supporting areas of the runners 2, 3). In the exemplary embodiment, this results in an angle of approximately 4.5°. This angle can be varied and, for example, lie in the range from 1° to 20°. Secondly, as can be seen in particular from Fig. 3, the axis of rotation 22 is also inclined in the direction of travel. In the exemplary embodiment, the corresponding angle is approximately 60° or, again in relation to the vertical axis, approximately 30°. This angle can vary, although angle ranges to the vertical of approximately 15° to approximately 45° have proven to be particularly advantageous.

[0045] This can be achieved if receptacles 25 are formed on the runner end 13, in particular by laser machining. These receptacles 25 then accommodate a rotation axis 22, for example a bolt, around which the wing 9 can be rotated forward. For this purpose, the wing 9 is connected to an associated cable pull section 7, 8. In the exemplary embodiment, a deflection pulley 21 is additionally provided for this purpose, which rotates about a further rotation axis 23 and is located in a recess 20 in the wing 9. The cable pull section 7 runs around this deflection pulley 21 from the front 10 of the carriage 1, initially to the wing 9, is then guided around the deflection pulley 21 and finally fixedly fastened with the second end in a holder 24, which is arranged in the opposite direction, i.e. in the direction of travel, as can be seen, for example, in Fig. 9.A cable pull section 7, 8 thus runs from the front side 10 of the carriage 1 around the deflection pulley 21 and is then fixed to the runner 2, 3 with a holder 24, so that a pulley function is achieved.

[0046] On the outside, the cable pull section 7, 8 is surrounded by a cable pull sheath 26 in the area between the holder 24 and a cable pull outlet at a front end of the runner 2, 3 in order to guide the cable pull section 7, 8 in the curved runners 2, 3 and in the outlet areas.

[0047] The described V-shaped design of the wing 9 results in the wing 9 having a lowest point or region at the lower edge 15. This region is adjusted by positioning the rotation axis 22 and the fastening or dimensions of the wing 9 such that this lowest region is approximately at the level of a support surface of the associated runner 2 or runner sliding surface, as can be seen in Fig. 6 and Fig. 7.

[0048] In Fig. 10 to Fig. 15, the carriage 1 together with the braking and steering device 6 is shown again, but in contrast to Fig. 1 to Fig. 9 in an actuated state of a wing 9. For this purpose, for example, the first wing 9 is actuated via the associated first cable pull section 7.

[0049] The way it works in use is as follows: Due to the V-shaped design of the wing 9 in the area of ​​the lower edge 15 and its positioning such that its lowest point or area is approximately at the level of the corresponding skid gliding surface, when traveling straight downhill, the wings 9 automatically align themselves in the direction of travel due to the forces acting and the low contact of the respective wing 9 with the roadway. Due to the V-shaped design, the corresponding braking effect and the associated loss of speed are negligible. If braking and / or steering is now desired, the driver actuates the cable section 7, 8 exposed on the front 10, which is intended to initiate braking and / or steering. Depending on what is desired, one or both of the cable sections 7, 8 can be actuated.By applying the appropriate tensile force and stationary fixation of the opposite end of the cable pull section 7, 8 in the holder 24, the associated wing 9 is folded forward towards the outer side 12 of the carriage 1, viewed in the direction of travel, thereby triggering braking and / or steering. The flat design of the wings 9 results in high braking efficiency. Furthermore, the double inclination of the axis of rotation 22 and thus also of the wing 9, in conjunction with the V-shaped design, ensures that the first area 17 of the wing 9 with the teeth 16 comes into contact with the roadway or the ground 27 first. In icy conditions, this already achieves a sufficient braking effect, for which the claw-like engagement of the teeth 16 is particularly suitable. In soft conditions, however, such as slush, the teeth 16 do not grip sufficiently.The wing 9 is then retracted even further into the roadway or subsurface 27 due to the acting tensile force, so that the second area with the straight lower edge 15, and thus also the wing section above it, comes into full-surface contact with the snow, thereby triggering the desired braking effect. When the braking and / or steering process is terminated and no further tensile force is applied, the activated wing 9 automatically returns to the zero position due to the slight contact in the area of ​​the lowest point of the V-shaped projection 19, in which the wing 9 is aligned along the longitudinal axis of the associated runner 2, 3.

[0050] A slight tilt of the wing 9 relative to the vertical axis, also outward, results in the wing 9 being inclined in the direction of travel. This provides effective splash protection, which is particularly advantageous in soft snow conditions, but can also be beneficial on icy road surfaces. Where provided, the projection 19 on the upper edge 14 of the wing 9 also contributes to this.

[0051] In principle, according to the invention, no return element is required to return the wing 9 to a zero position. This facilitates a simple design of the braking and steering device. If a return element is nevertheless desired, it is expediently combined with the rotational axis 22 of the wing 9, so that the wing 9 automatically returns to the zero position, even without ground contact, when no tensile force is acting. For this purpose, a corresponding torsion spring can be provided, for example.

Claims

Patent claims 1 . Sled (1) comprising a first runner (2) and a second runner (3), a seat (4), at least one frame part (5) which connects the runners (2, 3) and optionally supports the seat (4), and a manually operable braking and steering device (6) which has a first cable pull section (7) and a second cable pull section (8), wherein each cable pull section (7, 8) is connected to a respective wing (9), wherein the wings (9) are positioned approximately in the direction of travel and can be brought into engagement with a roadway for braking and / or steering by actuating the cable pull sections (7, 8), wherein the cable pull sections (7, 8) can be actuated on a front side (10) of the sled (1) and the wings (9) are arranged in a rear region (11) of the sled (1), characterized in that the wings (9) are rotatably mounted and fold out when actuated by the associated cable pull section (7, 8).

2. Sledge (1) according to claim 1, characterized in that the wings (9) open towards an outer side (12) of the sledge (1).

3. Sledge (1) according to claim 1 or 2, characterized in that the first runner (2) and the second runner (3) are each hollow and the cable pull sections (7, 8) are partially guided in the runners (2, 3) along a direction from the front side (10) of the sledge (1) to a rear side of the sledge (1).

4. Carriage (1) according to one of claims 1 to 3, characterized in that the cable pull sections (7, 8) are designed as separate cables.

5. Carriage (1) according to one of claims 1 to 4, characterized in that the wings (9) are mirror-symmetrical.

6. Sledge (1) according to one of claims 1 to 5, characterized in that the wings (9) are arranged at a runner end (13).

7. Carriage (1) according to one of claims 1 to 6, characterized in that the wings (9) are formed with an upper edge (14) and a lower edge (15), wherein the lower edge (15) has a first region with teeth (16) and a second region which is substantially straight.

8. Carriage (1) according to one of claims 1 to 7, characterized in that the wings (9) are formed on the underside downwards approximately V-shaped.

9. Carriage (1) according to one of claims 1 to 8, characterized in that the wings (9) are mounted on a rotation axis (22) which are inclined forward in the direction of travel obliquely to the roadway, preferably at an angle between a roadway and the rotation axis (22) of 30° to 85°, in particular 40° to 75°.

10. Carriage (1) according to one of claims 1 to 9, characterized in that the wings (9) are each mounted on a rotation axis (22) which is inclined outwards transversely to the direction of travel, preferably at an angle of 1° to 25°, in particular 2° to 15° to a vertical axis (28).

11. Sledge (1) according to one of claims 1 to 10, characterized in that the wings (9) are formed on the upper edge (14) with a projection (19) which extends in the direction of travel.

12. Sledge (1) according to one of claims 1 to 11, characterized in that the wings (9) each have a recess (20) in which a deflection roller (21) is mounted, and the cable pull sections (7, 8) each run through the recess (20) and around the deflection roller (21) and are then fixedly fastened in the opposite direction to the sledge (1), in particular the runner (2, 3).

13. Sledge (1) according to one of claims 1 to 12, characterized in that the wings (9) are positioned such that a lowest point of the lower edge (15) of the wing (9) lies approximately at the level of a skid sliding surface.

14. Carriage (1) according to one of claims 1 to 13, characterized in that the wings (9) are V-shaped at a lower edge (15) facing the roadway and are positioned such that a V-shaped projection (19) is in contact with the roadway.

15. Carriage (1) according to one of claims 1 to 14, characterized in that the manually operable braking and steering device (6) is designed without a return spring.

16. Hand-operated braking and steering device (6) for a carriage (1) according to one of claims 1 to 15, characterized in that the braking and steering device (6) has a cable pull section (7, 8) with a first end and a second end and a wing (9) with a recess (20) and a deflection roller (21) mounted therein, wherein the cable pull section (7, 8) can be guided around the deflection roller (21), as well as a rotation axis (22) which rotatably receives the wing (9), and a fastening for the second end of the cable pull section (7, 8), wherein the first end is kept free.

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