WO2022228882A1

WO2022228882A1 - Ski having retaining device

Info

Publication number: WO2022228882A1
Application number: PCT/EP2022/059677
Authority: WO
Inventors: Rudolf Loibl-Keimer; Thomas Schuhbaum
Original assignee: Loibl Keimer Rudolf; Thomas Schuhbaum
Priority date: 2021-04-26
Filing date: 2022-04-12
Publication date: 2022-11-03
Also published as: DE102021110559B4; EP4106892A1; EP4106892B1; DE102021110559A1; EP4106892C0

Abstract

The invention relates to a ski comprising a ski main body (2) having a sliding surface (3) and a binding part (4) to which a skier's boot can be fastened, wherein the binding part (4) is fixed on the ski main body (2) so as to be movable in the longitudinal direction (LR), wherein at least one control surface (5) which interacts at least indirectly with at least one spike (6, 6') that is movably mounted in the ski main body (2) is provided on the binding part (4) or on a functional part connected to the binding part (4), and wherein the spike (6, 6'), in a first, forward push position of the binding part (4), is positioned in a pushed-back position in which the free end (6.1, 6.1') of the spike (6, 6') does not project beyond the sliding surface (3), and the control surface (5) interacts at least indirectly with the spike (6, 6') in such a way that when the binding part (4) is moved relative to the ski main body (2) during a push-off movement of the skier, the spike (6, 6') is positioned in a pushed-forward position in which the free end (6.1, 6.1') projects beyond the sliding surface (3).

Description

SKI WITH RETENTION DEVICE

The invention relates to a ski with means for reducing backward sliding.

Skis, in particular cross-country skis, with anti-slip devices are known in principle. Cross-country skis can have scales in a central region of the ski, which are intended to prevent the ski from sliding back when the cross-country skier pushes off. It is also known to apply grip wax or skins to cross-country skis, which are intended to prevent the ski from sliding back.

In touring skis in particular, so-called climbing skins are used to prevent slipping back. They should prevent the skis from slipping backwards during the ascent, but should also allow gliding forwards.

A significant disadvantage of known anti-slip devices is that their effect depends very much on the current underground conditions and the temperature. Especially on icy ground, known anti-sliding devices show relatively little effect and can only adequately prevent undesired sliding back. In addition, known anti-slip devices also impair the gliding behavior of the ski in the running direction, which is fundamentally undesirable

Proceeding from this, it is the object of the invention to specify a ski which has an effectively effective anti-slip device and at the same time shows good gliding properties in cases where no anti-slide device is necessary. The object is solved by a ski with the features of independent patent claim 1 . Preferred embodiments are the subject matter of the dependent claims.

In one aspect, the invention relates to a ski. The ski comprises a basic ski body with a sliding surface and a binding part to which a skier's boot can be fastened. The binding part is, for example, a commercially available cross-country ski binding or touring ski binding. The binding part is fixed to the basic ski body so that it can be displaced in the longitudinal direction. As a result, the binding part can be shifted between a first and second sliding position in the longitudinal direction of the ski. At least one control surface is provided on the binding part or on a functional part connected to the binding part, which interacts at least indirectly with at least one mandrel displaceably mounted in the ski base body. In particular, the mandrel bears against the control surface with its free end facing away from the sliding surface. The interaction is in particular such that the at least one mandrel is moved, in particular can be displaced, by the displacement of the binding part. This displacement is brought about in particular by the action of the control surface on the free end of the at least one dome. The at least one mandrel is positioned in a first, front sliding position of the binding part in a pushed-back position in which the free end of the mandrel does not protrude beyond the sliding surface, ie the free end of the mandrel is pushed into the basic ski body. The control surface interacts at least indirectly with the mandrel in such a way that when the binding part is displaced relative to the basic ski body from the first, front shifting position to a second, rearward shifting position, for example when the skier pushes off, the mandrel is positioned in an advanced position, in the free end over the sliding surface protrudes in order to prevent the ski from slipping back during the push-off movement by engaging in the ground.

The technical advantage of the ski is that a back-slip protection is created, which is activated during the normal course of movement of the skier when pushing off and is deactivated when the ski is subsequently pulled towards it, and can therefore be operated intuitively. In addition, the ski offers an effective anti-backslip protection, which has an effective effect against backsliding in different ground conditions, especially when it is heavily icy.

According to one embodiment, the mandrel is positioned in the retracted position by means of a spring. This ensures that the mandrel is pushed into the ski, i.e. the anti-slip device is deactivated, without external force being applied, which can be caused by the skier pushing off, for example.

The spring loading of the dome can be done in different ways. Thus, the mandrel can be directly spring-loaded by a spring acting directly on the mandrel. For example, the spring can be a compression spring acting between the ski and the mandrel. It can, for example, run around the circumference of the mandrel.

Alternatively, the mandrel can also be indirectly spring-loaded, ie the spring does not act directly on the mandrel but via an intermediate element. For example, the spring can act on the displaceable binding part itself and hold the binding part in the first, front, sliding position without the application of external force. In order to be able to move the mandrel in both directions, a positive connection can be provided between the binding part or a functional part connected to the binding part and the mandrel. For example, in the area of Control surface may be provided for the mandrel a constrained guidance, which at least partially surrounds the mandrel, for example free end side. Due to the form-fitting connection, the mandrel is positioned either in the pushed-back position or in the pushed-forward position, depending on the sliding position of the binding part.

It is also conceivable that both a spring acting directly on the mandrel and a spring acting on the binding part are provided.

It should be noted that it is possible to completely dispense with the spring loading of the spikes and/or the binding part, so that the activation and deactivation of the anti-slip device is carried out solely by the forces applied by the skier. In this case, however, the above-described restricted guidance for the at least one mandrel should be provided in the area of the control surface.

According to one exemplary embodiment, the control surface is an inclined plane that is translated in translation when the binding part is displaced in the longitudinal direction of the basic ski body. As a result of the displacement of the control surface, the at least one mandrel is displaced along its longitudinal axis, specifically from the retracted position, in which the mandrel is positioned due to its spring loading, into an advanced position. As a result, a sliding movement of the binding part along the longitudinal axis of the ski can be converted into a sliding direction of the mandrels that runs transversely to this longitudinal axis and is directed downwards.

According to one exemplary embodiment, the control surface is provided directly on the binding part itself or on a functional part that is detachably attached to the binding part. The functional part can, for example, be an insert that is coupled to the binding part and can be removed separately in order to To be able to carry out maintenance and repair work on the anti-slip device, especially on the spikes.

According to one embodiment, the control surface is an inclined plane which forms an acute angle with the sliding surface of the ski, which angle opens counter to the running direction of the ski, i.e. towards the back of the ski. As a result, a sliding movement of the binding part running in a horizontal direction can be converted into a sliding direction of the mandrels directed obliquely downwards.

According to one exemplary embodiment, the control surface forms an angle with the sliding surface in the range between 10° and 60°, for example between 15° and 45°, preferably between 25° and 35°, in particular between 28° and 32°. The choice of this angle has an advantageous effect on the triggering time of the anti-slip device when the skier pushes off and also leads to a high level of functional reliability.

According to one embodiment, the longitudinal axis of the at least one dome runs obliquely to the sliding surface in such a way that the longitudinal axis of the at least one dome encloses an acute angle with the sliding surface of the ski, which angle opens in the running direction of the ski, i.e. towards the front of the ski. This inclined position of the at least one dome causes it to be pushed out of the sliding surface at an angle to the rear, thereby having an advantageous effect against the ski sliding back.

According to one embodiment, the longitudinal axis of the at least one dome forms an angle with the sliding surface in the range between 30° and 80°, for example between 45° and 75°, preferably between 55° and 65°, in particular between 58° and 62° a. This inclined position of the at least one pin is advantageous because a particularly effective means of preventing the pin from slipping back is achieved, while at the same time the pins are pushed out safely, which is synchronized with the sequence of movements of the skier.

According to one exemplary embodiment, at least two mandrels are provided, which are arranged one behind the other as seen in the longitudinal direction. As a result, an advantageous anti-slip device can be achieved, which also leads to the least possible weakening of the ski.

According to one embodiment, the longitudinal axes of the at least two mandrels run parallel to one another. As a result, the spikes in the ski are oriented in a similar way and engage the ground in the same direction. In addition, the mandrels can be controlled with an identically designed sliding gate in the form of control surfaces oriented in the same way.

According to one embodiment, the spikes are provided centrally or substantially centrally in the ski with respect to the transverse direction of the ski. As a result, the spikes come to lie one behind the other as seen in the longitudinal direction of the ski, which offers advantages with regard to the integration of the spikes into the ski.

According to one exemplary embodiment, at least two spikes are arranged laterally offset from one another, viewed in the longitudinal direction of the ski. As a result, a compact integration of the anti-slip device into the ski can be achieved.

According to one exemplary embodiment, the binding part is slidably guided in a rail attached to the basic ski body. As a result, a sliding guide for the binding part is achieved, so that the binding part slide slightly backwards when the skier pushes off and thus the anti-slip device can be activated.

According to one exemplary embodiment, the binding part is designed to be shifted from a front position to a rear position, which is shifted counter to the running direction, when the skier pushes off. As a result, triggered by the skier's normal movement sequence, activation of the anti-slip device is achieved.

According to one embodiment, the displacement path of the binding part is less than 5 cm, preferably less than 3 cm. With a very small displacement path, which is hardly noticeable to the skier, the slide back of the ski can be effectively reduced.

The ski can be a cross-country ski or a touring ski.

The free end of the dome protruding from the ski in the advanced position can be bolt-like and, for example, tapered or tapered to a point. Alternatively, the free end of the dome can form a flat, for example platelet-shaped or spade-like section that runs transversely to the running direction, so that a large-scale intervention in the snow can be achieved. This can be particularly advantageous for touring skis.

The terms “approximately”, “substantially” or “roughly” mean deviations from the exact value by +/-10%, preferably by +/-5% and/or deviations in the form of changes that are insignificant for the function .

Developments, advantages and possible applications of the invention also result from the following description of Embodiments and from the figures. All of the features described and/or illustrated are fundamentally the subject matter of the invention, either alone or in any combination, regardless of how they are summarized in the claims or how they relate back to them. The content of the claims is also made part of the description.

The invention is explained in more detail below with reference to several figures of exemplary embodiments. Show it:

1 is an example of a plan view of a ski binding from above;

FIG. 2 shows an example of a longitudinal section through the ski binding along the section line A-A according to FIG. 1 , the binding part moving the pins being in the forward sliding position and the pins thus being pushed into the basic ski body; and

3 shows an example of a longitudinal section through the ski binding along section line AA according to FIG.

FIG. 1 shows, by way of example and schematically, a plan view of a section of a ski 1 on which a binding part 4 is provided. The ski 1 has a basic ski body 2 with a sliding surface 3 in a known manner. The ski 1 can, for example, be a touring ski or a cross-country ski, in particular a cross-country ski for classic cross-country skiing. The ski 1 has a running direction LR, as shown in FIG The formation part 4 has fixing means to which a skier's shoe can be fixed. In particular, the fixing means are designed in such a way that they interact with corresponding fixing means provided on the front of the shoe, so that a detachable connection is created between the skier's shoe and the ski.

The binding part 4 is held displaceably on the ski base body 2 in such a way that the formation part 4 can be displaced in the longitudinal direction of the ski 1 relative to the ski base body 2 . This allows him

Binding part 4 can be moved to the ski 1 between a front position and a rear position. In order to enable the displacement of the binding part 4 , one or more rails running in the longitudinal direction LR of the ski 1 can be provided on the upper side of the ski base body 2 . The binding part 4 can, for example, be guided in this at least one rail in a form-fitting manner.

As can be seen in the sectional representations of FIGS. 2 and 3, the binding part 4 is designed to move the mandrels 6, 6' from a pushed back position, as shown in FIG. 2, into a pushed position, as shown in FIG 3 is shown to bring.

The mandrels 6, 6' can be slidably guided in sliding sleeves that are introduced into the basic ski body 2.

The spikes 6, 6′ form a back-sliding safeguard, ie when the skier pushes off, they are activated and penetrate into the ground, ie the ice or snow underneath the ski, in order to prevent the ski 1 from sliding back. When the ski is then pulled back, the mandrels 6, 6' are pushed back into the position positioned so that they no longer dig into the snow or ice.

To move the pins 6, 6', the binding part 4 has at least one control surface 5, by means of which the sliding movement of the binding part 4 is converted into a sliding movement of the pins 6. Since two pins 6 are provided in the exemplary embodiment shown, the binding part 4 also has two control surfaces 5, one for each pin 6, 6'.

The control surface 5 can be provided either directly in the binding part 4 or on a functional part that is connected to the binding part 4 . In the exemplary embodiment shown, a functional part 4.1 is inserted into the binding part 4. This functional part 4.1 can, for example, be detachably connected to the binding part in order to be able to remove the functional part 4.1 and thus be able to service the mechanism of the anti-slip device. The functional part 4.1 can be held or secured in the binding part 4, for example, by one or more screws.

As can be seen in FIGS. 2 and 3, the control surface 5 runs obliquely to the sliding surface 5. As a result, the sliding movement of the binding part 4 can cause the pins 6, 6' to be pushed out further. The control surface 5 runs, for example, at an acute angle a obliquely to the sliding surface 3. This angle a opens in the opposite direction to the running direction LR of the ski 1 toward the rear. The angle a can be between 10° and 60°, for example between 15° and 45°, preferably between 25° and 35°, in particular between 28° and 32°.

The bolts 6, 6' preferably run at right angles to the control surface 5. The longitudinal axes of the bolts 6, 6' each enclose an angle β between 30° and 80°, for example between 45° and 75°, preferably between 55° and 65°, in particular between 58° and 62° with the sliding surface 3, the angle β opening up in the running direction LR of the ski 1.

As can be seen in FIGS. 2 and 3, the mandrels 3 are prestressed by a spring 7 into the pushed-in position in which the free ends 6.1, 6.1' of the mandrels 6, 6' do not protrude over the sliding surface 3. The spring force of the spring 6 is preferably also chosen such that the binding part 4 is positioned in the advanced position, as shown in FIG. The free ends opposite the free ends 6.1, 6.1' are in contact with the control surfaces of the binding part 4

If the binding part 4 is now displaced in the longitudinal direction of the ski, as indicated by the arrow in FIG. be pushed out of the ski body 2, so that the free ends 6.1, 6.1 'with respect to the sliding surface 3 protrude. The effect of this is that the spikes 6, 6' engage in the snow or ice located below the sliding surface 3 and thereby prevent the ski 1 from sliding back when the skier pushes off.

If no more force is applied to the binding part 4 in the opposite direction to the running direction LR or if the ski is being pulled or gliding, the binding part 4 is brought back into the front sliding position shown in Fig. 2, whereby the spikes 6, 6' are pushed back into be positioned in the retracted position. In the exemplary embodiment shown, the mandrels 6, 6' are arranged in the center or essentially in the center, viewed in the transverse direction of the ski. The mandrels 6, 6' are preferably provided one behind the other in the longitudinal direction of the ski.

It goes without saying that the mandrels 6, 6' can also be provided next to one another in the transverse direction of the ski 1. Furthermore, it goes without saying that the variant shown here with two mandrels 6, 6' is merely an example and only one mandrel 6 or more than two mandrels 6, 6' can be provided.

A safety mechanism can preferably be provided, by means of which the binding part 4 can be locked in the front sliding position, so that the safety device against sliding back is deactivated. The safety mechanism can, for example, be coupled to the locking device of the skier's boot in such a way that locking the boot on the binding part unlocks the anti-slip device (i.e. the binding part can be moved and the pins can be pushed out of the ski). Conversely, unlocking the boot on the binding part can lock the anti-slip device (i.e. the binding part can no longer be moved to the second, rear sliding position and the spikes can no longer be pushed out of the ski).

The invention has been described above using exemplary embodiments. It goes without saying that numerous changes and modifications are possible without leaving the scope of protection defined by the patent claims. Reference List

1 skis

2 ski body

3 sliding surface

4 binding part

5 control surface

6 6 Thorn

6.1 , 6.1' free end 7 spring

LA longitudinal axis LR running direction a angle ß angle

Claims

patent claims

1) Ski comprising a basic ski body (2) with a sliding surface (3) and a binding part (4) to which a skier's boot can be attached, the binding part (4) being fixed to the basic ski body (2) so that it can be displaced in the longitudinal direction (LR). at least one control surface (5) is provided on the binding part (4) or on a functional part connected to the binding part (4), which interacts at least indirectly with at least one mandrel (6, 6') displaceably mounted in the ski base body (2), wherein the mandrel (6, 6') is positioned in a first, forward sliding position of the binding part (4) in a pushed-back position in which the free end (6.1, 6.1') of the mandrel (6, 6') does not extend beyond the sliding surface (3) protrudes, and the control surface (5) interacts at least indirectly with the mandrel (6, 6') in such a way that when the binding part (4) is displaced relative to the ski base body (2) from the first, front sliding position into a second, rear sliding position of the mandrel (6,

6') is positioned in an advanced position in which the free end (6.1, 6.1') protrudes over the sliding surface (3).

2) Ski according to Claim 1, characterized in that the mandrel (6, 6') is positioned in the pushed-back position by means of a spring (7). 3) Ski according to claim 2, characterized in that the mandrel (6, 6 ') by a directly on the mandrel (6, 6') acting spring (7) is directly spring-loaded or that the mandrel (6, 6 ') by a spring acting on the binding part (4) and a forced guidance of the dome (6, 6') in the area of the control surface (5) is indirectly spring-loaded. 4) Ski according to any one of the preceding claims, characterized in that the control surface (5) is an inclined plane which is translationally displaced when the binding part (4) is displaced in the longitudinal direction (LR) of the basic ski body (2).

5) Ski according to one of the preceding claims, characterized in that the control surface (5) is provided directly on the binding part (4) itself or on a functional part detachably fastened to the binding part (4).

6) Ski according to one of the preceding claims, characterized in that the control surface (5) is an inclined plane which encloses an acute angle (a) with the sliding surface (3) of the ski (1) which extends counter to the running direction (LR ) of the ski opens.

7) Ski according to claim 6, characterized in that the control surface (5) forms an angle (a) with the sliding surface (3) in the range between 10° and 60°, for example between 15° and 60°, preferably between 25° and 35° °, in particular between 28° and 32°.

8) Ski according to one of the preceding claims, characterized in that the longitudinal axis (LA) of the at least one dome (6, 6 ') runs obliquely to the sliding surface (3), in such a way that the longitudinal axis (LA) of the at least one dome (6, 6') with the

Sliding surface (3) of the ski (1) includes an acute angle (ß), which opens in the running direction (LR) of the ski (1).

9) Ski according to claim 8, characterized in that the longitudinal axis (LA) of the at least one dome (6, 6 ') with the sliding surface (3).

Angle (ß) in the range between 30 ° and 80 °, for example between 45° and 75°, preferably between 55° and 65°, in particular between 58° and 62°.

10) Ski according to one of the preceding claims, characterized in that at least two mandrels (6, 6') are provided, which are arranged one behind the other as seen in the longitudinal direction (LR).

11) Ski according to claim 10, characterized in that the longitudinal axes (LA) of the at least two mandrels (6, 6') run parallel to one another.

12) Ski according to claim 10 or 11, characterized in that the mandrels (6, 6') are provided in the center or essentially in the center of the ski in relation to the transverse direction of the ski.

13) Ski according to one of the preceding claims, characterized in that at least two mandrels (6, 6') are arranged laterally offset from one another, viewed in the longitudinal direction (LR) of the ski.

14) Ski according to any one of the preceding claims, characterized in that the binding part (4) is guided displaceably in a rail attached to the basic ski body (2).

15) Ski according to one of the preceding claims, characterized in that the binding part (4) is designed to be shifted in a push-off movement of the skier from a front sliding position into a rearward sliding position opposite to the running direction (LR). 16) Ski according to claim 15, characterized in that the

displacement path of the binding part (4) is less than 5 cm, preferably less than 3 cm. 17) Ski according to any one of the preceding claims, characterized in that the ski is a cross-country ski or a touring ski.