WO2007022923A2

WO2007022923A2 - Ski

Info

Publication number: WO2007022923A2
Application number: PCT/EP2006/008169
Authority: WO
Inventors: Kaspar Krause; Blasius Gerg
Original assignee: Modell- Und Formenbau Blasius Gerg Gmbh
Priority date: 2005-08-24
Filing date: 2006-08-18
Publication date: 2007-03-01
Also published as: EP1922119A2; DE202005021774U1; US20100237588A1; WO2007022923A3; DE102005040088A1

Abstract

The invention relates to a ski, especially a downhill ski, and a trimming rod for such a ski. The ski comprises an elongate ski body and a gliding surface on the bottom face of the ski body. The ski is characterized by at least one approximately longitudinally extending recess and/or one or more receiving devices for detachably receiving a trimming rod. The flexural stiffness and/or the weight of the ski can be adjusted by inserting different trimming rods, thereby allowing to adapt the handling characteristics of the ski to the skier. The ski can also be provided with one or more damping elements.

Description

ski

The present invention relates to a ski.

Usually, skis have a ski body on the underside of which a sliding lining and steel edges are arranged. The top of the ski body is covered by a decorative cover. A ski body has a core, which is formed of wood and / or plastic and / or metal and on the underside of one or more lower straps and at the top of which one or more upper straps are arranged, with which the ski gave the desired bending and torsional rigidity becomes.

From DE 27 53 608 C2, a ski is apparent, which is formed of two superposed core parts, wherein between the two core parts an intermediate belt is provided.

DE 27 13 608 A1 describes a ski in which friction fibers are movably embedded for damping vibrations and are enclosed by adjacent material.

From DE 44 02 669 A1 a ski is known which has damping regions. The damping areas are formed on attachment areas for attaching the ski binding. The damping areas are arranged on the upper side of the ski body and enclosed by the upper belt.

From DE 10 2004 002 897 A1, a further ski emerges, which has a core made of polyurethane foam, in which reinforcing layers are embedded. DE 102 36 152 A1 discloses a ski and ski binding combination in which a flat band-like long part is arranged on the ski above the neutral bending plane. This long part is connected to a pin at one point with the ski and engages with one end to a damper device. When bending the ski, a pull or a pressure is exerted on the shock absorber over the long part, thus dampening the bending movement of the ski. This long part can also be arranged in a rail integrated in the ski. This long part is flexible. However, it can transmit greater tensile and shear forces in the longitudinal direction.

From the CH 554 178 A, a ski with a device for varying the flexibility of the ski emerges. In the ski body several metal or plastic profile bars are embedded for this purpose, which are anchored at its front, the ski tip near end in the ski body. At the rear end of a clamping device is provided with which the profile bars can be put under tension. This should be the flexural rigidity of the ski changeable.

DE 297 09 403 U1 describes a damping system for skis or snowboards, which has mechanical friction members which are firmly connected to the body of the ski or snowboard and cause friction thereon and thus to dampen the bending movements. The friction members are preferably embedded in the body of the ski or snowboard. The surfaces of the friction members may be formed with layers of rubber-elastic material or else from highly slippery materials.

EP 0 492 658 A1 discloses a binding plate which is arranged between a ski and the binding jaws. This plate has a freely displaceable plate element 103, wherein the plate element is firmly connected at one end to the ski. When bending the ski thus moves the exposed end of the plate member relative to the surface of the ski. This exposed end of this plate element is arranged adjacent to a stop, so that the bending movement of the ski is limited in the region of the bond. In particular, the stop is changeable in its position, so that in this way a different bending limit of the ski is adjustable.

The driving characteristics of an alpine ski are essentially determined by its flexural rigidity, torsional stiffness and sidecut. A strong sidecut allows driving tight turns on the edge, with the ski using the waist bent into the curve. However, the bending of the ski is also significantly influenced by the flexural rigidity of the ski.

It has long been known that skis with a low flexural rigidity are more comfortable to ride in deep snow or on soft slopes than skis with a high flexural rigidity. On hard slopes, on the other hand, skis with a high flexural rigidity are preferred, with considerably higher forces acting on hard slopes at high speeds on the ski than on soft pistes. In addition, the desired bending stiffness of the ski depends very much on the body weight, the driving style and the power of the skier using the skis. During racing, therefore, skis that are specially tailored to the characteristics of the racer are used. The flexural stiffness of the skis is measured with a three-point bending test and depending on the characteristics of the racer (weight, strength, technique) suitable skis are selected. Racers usually have several pairs of skis for each discipline (Downhill, Super-G, Riesenlalom, Slalom), whose ski body and surface are adapted to different slope conditions.

The invention has for its object to provide skis, especially alpine skis, whose bending stiffness is changeable.

The object is achieved by a ski having the feature of claim 1, advantageous embodiment of the invention are specified in the subclaims

The ski according to the invention has an elongated ski body and a sliding lining on the underside of the ski body.

The ski is characterized in that the ski body is designed with at least one approximately longitudinally extending recess and / or one or more storage devices distributed in the longitudinal direction of the ski for releasably receiving a trim bar with a predetermined flexural rigidity.

The longitudinally extending recess or one or more bearing devices arranged in combination with such a recess or a plurality of bearing devices arranged distributed in the longitudinal direction of the ski cause the trim rods to be coupled to the ski at at least three points distributed in the longitudinal direction of the ski. As a result, the flexural rigidity of the trim bar in the area coupled to the ski is added to the inherent bending stiffness of the ski body. -A-

By introducing a trim rod in the recess or the storage facilities of the ski whose bending stiffness can be significantly changed. By exchanging different trim bars or omitting a trim bar, the ski can be individually adapted to the needs of a skier, in particular to its weight, the condition of the runway and the driving style. This is particularly advantageous in combination with a sidecut of the ski, since the bending stiffness, the deflection caused by the sidecut, influences the edge of the ski.

The recess is preferably designed as an elongated hollow channel with a constant cross-section, wherein the hollow channel is bounded by a plastic tube or metal tube or is formed directly in the material of the ski body. The cross section of the hollow channel may be circular, elliptical, oval, rectangular or square. Preferably, the hollow channel has a greater height than width, so that a trim rod, which fits positively into the hollow channel, has a higher stiffness in the vertical direction than in the horizontal direction.

The hollow channel limiting tube is integrally embedded in the ski body. The ski body usually has an upper flange, wherein the hollow channel can be arranged below as well as above the upper flange.

Preferably, at least two hollow channels are provided, wherein one of the hollow channels is arranged above and the other below the upper flange. The vertical offset of the two hollow channels a significant stiffening of the ski is achieved when corresponding trim rods are inserted in both hollow channels.

The trim rod is an elongated, form-fitting fit into the recess of the ski body. By the term "mating fit", the present invention contemplates a fit having sufficient play to allow the trim bar to be inserted into and withdrawn from the recess, but not more play than is required for inserting and removing the trim bars is to be provided.

The trim rod may be formed of a fiber reinforced plastic, which usually has a high rigidity. Typical materials are fiber reinforced plastic and metals, such as aluminum or titanium. The trim rod may be formed over its entire length of rigid material. However, it may be appropriate be moderate, they form sections of materials of different bending stiffness.

Preferably, the trim bar is provided with a sheath made of a soft-elastic material, e.g. Rubber, provided. This soft-elastic material creates a high frictional connection, which effectively dampens high-frequency vibrations. The trim bar may also be sectioned or over its entire length of a heavy material, e.g. Lead or tungsten, be designed to increase the weight of the ski either in areas or over its entire length.

Another object of the invention is to provide a ski, in particular alpine skiing, whose handling characteristics are improved compared to conventional skis.

The object is achieved by a ski having the features of claim 26. Advantageous embodiments are specified in the subclaims dependent thereon.

This ski has a ski body and arranged on the ski body binding plate which is coupled by means of a fixed bearing on the ski.

This ski is characterized in that on the binding plate, a damping element is arranged, which is coupled via a lever mechanism to the ski body, which converts a change in height difference between the ski body and the binding plate in a horizontal translational movement, and the damping element on the binding plate is arranged that the translation movement is counteracted. As a result, height differences between the ski body and the binding plate, which arise when bending the ski, very effectively damped.

Preferably, the damping element is adjustable, so that the damping of the ski can be adjusted individually by a skier.

The invention will be explained in more detail by way of example with reference to the drawings. The drawings show schematically, in not to scale representation:

1 shows a ski according to the invention in plan view,

FIG. 2 shows a section through the ski from FIG. 1 along the line AA, FIG. 3 shows a trim rod,

FIG. 4 shows the ski according to the invention from FIG. 1 in side view, together with a binding unit,

FIGS. 5a-5d show cross sections of further skis according to the present invention,

FIG. 6 shows a further ski according to the invention in a perspective view from obliquely in front,

FIG. 7 shows a cross section through the ski from FIG. 6 in the region of the hollow channels,

FIG. 8 shows a further ski according to the invention in a perspective view from obliquely in front,

9 shows a detail of the ski from FIG. 8 in the blade area in a perspective view, and FIG

FIG. 10 shows a section of the ski from FIG. 8 in a perspective view in the binding area.

Figures 1 to 4 show in a non-scale representation of an embodiment of the ski 1 according to the invention together with a trim rod 11. The ski has an elongated ski body 2, which is provided at one end with a blade portion 3 with bent ski tip. The ski has a central binding area 4 and a rear end area 5.

In the central binding region 4, the ski is narrower in plan view than in the blade region 3 and in the rear binding region 5. This geometry is referred to as a sidecut.

On the underside of the ski body 2, a sliding coating 6 is formed with laterally arranged steel edges 7. The ski body 2 is coated with a decorative or deck covering ü.

The sidecut of the ski serves to bend it when edge-up, wherein the blade area 3 and the rear end area 5 opposite the central binding 4 can be bent slightly upwards. Preferably, the bend is such that the resting on the slope edge 7 describes a section of a circle, so that the ski is driven without a slip phase curve. However, the magnitude of the deflection and thus the radius of the curve depends not only on the sidecut of the ski, but also substantially on the forces acting and the flexural rigidity of the ski 1 from. Here, in particular, the weight of the skier, the speed and the position of the skier with respect to the ski center are taken into account. If the skier with his center of gravity is a bit in front of the ski center of the ski, then the blade area 3 will be bent more, whereas if the skier has a rearward arrangement, the rear end area 5 will be more strongly bent. The position of the skier above the ski depends very much on his posture and skiing technique.

The ski 1 shown in FIGS. 1, 2 and 4 has three recesses 8, which extend approximately in the longitudinal direction of the ski 1. The recesses 8 form elongated hollow channels with a constant, circular cross-section. They are each bounded by a plastic or metal tube, which is embedded in the ski body. The ski body has a wood core 9, on the underside of which a lower belt and on the upper side an upper belt is arranged. A central hollow channel 8/1 is formed in the core between the upper flange and the lower flange. The central hollow channel 8/1 extends straight from the rear end region 5 to the blade region 3.

The two other hollow channels 8/2 are arranged in plan view at the edge region of the ski 1 above the upper flange. These hollow channels 8/2 also extend from the rear end region 5 to the blade region 3, following the curvature of the sidecut of the ski.

The plastic tubes for limiting the hollow channels 8 are preferably made of fiber-reinforced plastic. Therefore, they already cause a significant stiffening of the ski 1, which is why the strength of the upper and lower flange belt can be reduced somewhat compared to conventional skis. By introducing trim rods 11 in the hollow channels 8, the bending stiffness of the ski 1 can be changed. In particular, the flexural rigidity of the ski can be varied greatly by exchanging trim bars or trim bars of different bending stiffness. Computer simulations have shown that the bending stiffness can be varied in the range of 15%, with the flexural rigidity being measured with the three-point bending test. The flexural rigidity of all rods is in the Total about 5 Nm ² to 150 Nm ² , which Beigesteifigkeit can be distributed over several rods. Preferably, the total bending stiffness of the trim rod (s) is in the range of 10 Nm ² to 100 Nm ² and in particular in the range of 25 Nm ² to 75 Nm ² .

The trim bars are preferably pultruded plastic rods with reinforcing fibers oriented only in the bar direction (unidirectional). The type and density of the fibers determined the rigidity of the trim bar. It is all known reinforcing fibers, e.g. Carbon fibers, boron fibers, glass fiber and the like. The trim bar can also be made of a suitable metal, such as e.g. Be formed aluminum or titanium or corresponding alloys. For manufacturing reasons, it is expedient to form the trim rod as a solid body. However, if a trim rod 11 has a low weight, then it may also be expedient to form it as a tube, in particular titanium tube or plastic tube.

The trimming rod 11 shown in Figure 3 has an existing metal end piece 9, with a threaded portion 10, with which the trim rod 11 (not shown) in a corresponding threaded bushing in the recess 8 can be screwed. The front end of the threaded rod 2 is exposed in the hollow channel 8, so that it does not abut the front end of the hollow channel 8 at a bending stress of the ski 1. The trim rod is thus arranged freely movable with one end in the longitudinal direction of the ski. This ensures that there is no tension between the trim rod 11 and the hollow channel 8.

In the context of the invention, it is of course also possible to fix the trim rod 11 in a different way to the ski 1. The holding forces required for this purpose are also very low, since due to the bias of the ski (see Figure 4), the hollow channel 8 has a certain curvature, so that the rectilinear trim rod 11 is slightly biased in the hollow channel 8 and a certain fixing effect by a frictional engagement results.

With the trim rod according to the invention, it is also possible to stiffen the ski in certain areas by the trim bar 11 is formed in sections of materials with different stiffness. Thus, it is expedient to provide a higher rigidity in the front area of the ski than in the rear area of the ski for a skier who drives with a lot of template. Accordingly, the trim rod 11 is then in the front of a very rigid material and in the rear Area formed of a less rigid material. For skiers with a not very mature skiing technique, it may be appropriate to make the front and rear areas relatively soft and stiffen the central binding area 4. This makes it easy to bend the ski into the bend and yet it has a certain rigidity, which gives the skier safety in harder piste conditions. In such a case, for example, it may be expedient to omit the front portion of the trim bar completely, to form the trim bar of a stiff material in the central area and to form the rear end area of a non-fiber-reinforced plastic material with low rigidity.

In racing, however, it may be useful to adjust the weight with the trim rod according to the invention in addition to the rigidity. This can be achieved, for example, by providing a heavy trim rod, e.g. made of lead or tungsten can be achieved. However, it may also be expedient to form sections of the trim rod 11 from a material of high weight and of materials with high rigidity. For racing, it may be useful to provide a trim bar made of heavy material in the central binding area 4, whereas in the front and rear area, the trim bar is made of a highly rigid material.

As has already been explained above, the hollow channels 8/2 are arranged offset in relation to the hollow channel 8/1 upwards. Due to this vertical offset of the hollow channels and the trim bars therein, a substantially higher rigidity of the ski is achieved than if the hollow channels were all arranged on one plane, since in the central binding region 4 of a ski a very high rigidity is usually desired also expedient to provide this vertical offset in the central binding region 4 and to guide the upper hollow channels 8/2 in the direction of the blade region 3 and in the direction of the rear end region 5 down into the plane of the central or lower hollow channel 8/1. As a result, the trim bars 11 in the central binding area 4 of the ski cause a stronger stiffening than at the front or rear end area of the ski.

Shown schematically in FIGS. 5a to 5d are simplified cross sections through further exemplary embodiments of the ski according to the invention, each having a ski body 2, a sliding lining 6 and two steel edges 7. These ski bodies have two hollow channels 8 (FIG. 5a) and one hollow channel (FIGS 5d). The hollow channels may be circular in cross section (FIG. 5a, 5b) or rectangular (FIG. 5c), oval (FIG. 5d) or elliptical. The trim bars are equipped with a chenden cross-sectional shape designed to match. The fit is in the range of 5/100 mm to 1/10 mm.

The above embodiments relate to a ski body 2 with a wood core and a lower flange and a top flange. However, the inventive construction of a ski with longitudinally extending recess for releasably receiving a trim rod can also be used in a very advantageous manner for the individual stiffening of skis with a core made of plastic foam, in particular polyurethane foam. Such skis are e.g. in DE 10 2004 002 897 A1. They can be produced very cheaply. With the hollow channels and trim rod according to the invention they also have the desired bending stiffness, which they often lack.

Furthermore, it may be expedient to provide the trim bars 11 with a jacket of soft-elastic material, such as e.g. To provide rubber. This material causes considerable friction between the hollow channel and the trim rod 11 in the oscillatory movement of the ski 1. As a result, high-frequency vibrations of the ski 1 are effectively damped. Such a soft-elastic jacket is particularly useful in the central binding region 4 of the ski 1.

FIGS. 6 and 7 show a further embodiment of a ski according to the invention. This ski also has a blade area 3, a central binding area 4, a rear end area 5, a sliding lining 6 and two steel edges 7.

The ski has two recesses in the form of hollow channels 8, which extend slightly beyond the central binding region 4 of the ski. The hollow channels 8, however, each end in front of the front blade area 3 and in front of the rear end area 5 and open open above the surface of the ski in the blade area 3 or in the rear end area 5. A trim bar 11 introduced into the hollow channel 8 thus protrudes at both ends of the hollow channel and lies freely above the blade area 3 or the rear end area 5 of the ski 1.

To fix the trim rods 11, bearings 12, 13 are provided in the blade area 3 and in the rear end area 5 of the ski 1. The bearings 12, 13 are metal parts, the vertical through holes for attaching the bearings 12, 13 by means of screws in embedded in the ski 1 threaded bushings 14 have. There are several threaded bushes 14 distributed in the longitudinal direction of the ski, so that the Bearings 12, 13 can be arranged at different positions on the ski.

The rear bearing 12 has two horizontal eyelets 15 for receiving the rear end region of the trim rods 11. In the blade area, a separate front bearing 13, each with a single eye 15 for receiving the front end portion of the trim rod is provided for each trim rod. In the eyelets 15 each have an O-ring is arranged.

The eyelets 15 of the rear bearings 12 engage in corresponding cuts on the trim rods 11, so that the trim rods are fixed in the longitudinal direction on the ski 1. In the eyelets 15 of the front bearing 13 store the trim rods 11 with a little game floating, ie without fixation in the longitudinal direction. The trim bars are thus freely movable in the longitudinal direction of the ski.

Since the bearings 12, 13 can be arranged at different positions in the longitudinal direction, the position of the trim rods with respect to the ski 1 can be changed accordingly. In this way, one can set whether the ski at the front or rear area should have a higher bending stiffness and adjust the driving characteristics of the ski to the extent that the skier travels with more forward or supine position.

The ski body 2 of this ski has a jacket 16 made of fiber-reinforced plastic material, in particular carbon fiber or carbon fiber reinforced material (FIG. 7). In this jacket, the two hollow channels 8 are formed. The trim rods 11 located in the hollow channels 8 in FIGS. 6 and 7 are of tubular design. It is possible to insert further trim rods of smaller outside diameter into the tubular trim rods 11. As a result, the flexural rigidity can be further varied.

The structure of the core 2 can in principle be designed as desired from wood and / or plastic and / or metal.

The ski 1 shown in FIG. 6 has a binding plate 17 integrated into the ski. The binding plate 17 is arranged at a distance above the surface of the ski body 2. It is connected to two rear support columns 18 and two front support columns 19 to the ski. All support columns 18, 19 are in the ski body 2 by means of a pivot joint (not shown) connected to the ski body 2. The columns can be pivoted about the pivot joints a piece in the longitudinal direction of the ski. The rear support columns 18 are rigidly connected to the binding plate 17. The front support columns 19 are in turn connected to the binding plate 17 with a pivot joint 20. The front support columns thus form a standing rocker. The support columns 19 can therefore also be referred to as pendulum supports. As a result, the bending line of the ski 1 is completely decoupled from the binding plate 17. This type of coupling of the binding plate 17 to the ski body 2 represents a fixed-lot storage of the binding plate 17 with respect to the ski body 2.

Preferably, the support columns are coupled in the ski body 2 in a bending-neutral area by means of the pivot joints to the ski body 2. If the ski body consists of an isotropic material, then the bend-neutral area is located in the middle between the top and bottom of the ski body. If the ski body consists of an anisotropic material, then the bending-neutral area is arranged offset correspondingly upwards or downwards.

This coupling of the binding plate is very advantageous in combination with the inventive design of the ski with a recess for receiving a trim rod, as this is the individual adjustment of the bending stiffness by the use of appropriate trim rods optimal advantage. However, this coupling of the binding plate to the ski is also an independent idea of the invention.

In the embodiment shown in FIGS. 1, 2 and 4, the recess or hollow channel extends over approximately 70% to 80% of the total length of the ski. In the embodiment shown in Fig. 6, 7, the hollow channel 8 extends only over 40% to 50% of the length of the ski. In principle, it is possible to fix the trim rod only with appropriate bearings (see bearings 12, 13) on the ski. However, it is preferred to provide a hollow channel at least in the binding region. Expediently, the hollow channel extends over a length of at least 30% of the total length of the ski, or of at least 50% of the total length of the ski, or of at least 70% of the total length of the ski.

FIGS. 8 to 10 show a further embodiment of a ski according to the invention. The basic structure of this ski corresponds to the ski of Figure 6 and 7, which is why the same parts are designated by the same reference numerals. They will not be explained again. The ski 1 according to FIGS. 8 to 10 differs from the ski 1 according to FIGS. 6 and 7 by damping elements 21, 22, 23. The damping elements 21, 22, 23 are hydraulic shock absorbers in a cylindrical design in which a piston is movably mounted. As it moves, a fluid is forced through throttles, thereby dampening the movement of the piston. The piston is connected to an outwardly guided piston rod 24, 25, 26.

The damping elements 21, 22, 23 are preferably adjustable in their damping effect, so that the damping of the ski can be adjusted individually by a skier. In particular, a hydraulic oil used in the damper may be temperature-dependent, so that it is expedient to change the damping effect depending on the temperature. The damping effect is adjusted by means of a handwheel 27 on the damping elements 21, 22, 23. The hydraulic oil used in the damping elements 21, 22, 23 is specially designed for low temperatures.

The front ends of the trim rods 11 are each coupled to a piston rod 24 of the damping elements 21 by means of ball joints. The damping elements

21 are elongated bodies, which are arranged in a straight line extension to the trim rods 21 on the ski 21. The damping elements 21 are by means of two

Mounts 28 rigidly connected to the surface of the ski body 2 in the blade area 3. The brackets 28 are releasably secured by screws on the ski body 2 and their position can be changed in the longitudinal direction of the ski.

At the rear end portion 5 of the ski 1 are corresponding damping elements

22 coupled by means of its piston rod 25 to the rear ends of the trim rods 11 by means of ball joints and fastened with suitable brackets 29 on the surface of the ski body 2. Also, their position can be changed in the longitudinal direction of the ski.

The damping elements 21, 22 thus form bearing means for supporting the ends of the trim rods 11, wherein the ends are movably mounted in the longitudinal direction of the ski. The damping elements 21, 22 are relatively small and designed with a small displacement volume, so that they only effectively dampen with faster deflections of the ski.

In the present embodiment, the trim rods 11 are arranged freely displaceable in hollow channels 8. Experienced while driving the ski in the blade area 3 or in the rear end portion 5 a bend, so shortening the distance between the damping elements 21, 22 whereby the trim rods 11 press the corresponding piston rods 24, 25 in the corresponding cylinder. The bending of the ski 1 in the blade area 3 or in the rear end area 5 is thus damped by the damping elements 21, 22. The same applies to the return movement into the initial state, which is delayed by the damping elements 21, 22. As a result, an uncontrolled swinging of the ski is prevented.

Furthermore, it may also be expedient to fix the trim rods 11 in the region of the ski center or in the central binding region 4. Then, the front half of the ski 1 is damped only by the front damping elements 1 and the rear half of the ski 1 by the rear damping elements 22. For the driving characteristics of the ski is particularly important that the front of the ski is damped. Therefore, it may be useful to provide only the front damping elements 21 and to fix the trim bars either in the area of the ski center or in the central binding area 4 or in the rear end area 5. Simulations have shown that with the front damping elements 21, the first and second eigenmode of the vibration of the ski are damped.

Furthermore, the central damping element 23 is provided, which can be used in combination with the front and / or rear damping elements 21, 22 or even alone. The central damping element 23 is arranged in a recess 30 of the binding plate 17 and protrudes in this slightly upwards. The damping element 23 protrudes about 2 cm above the upper surface of the binding plate 17 in the region approximately in the middle between a front and rear jaw of a binding (not shown). Since at the binding jaws each have a support surface of predetermined height and the ski boots in the central region have a bulge, the ski boots of conventional design do not collide with the damping element 23rd

The damping element 23 is oriented with its piston rod 26 pointing approximately horizontally in the direction of the blade area 3 pointing. The piston rod 26 projecting on the damping cylinder 32 of the damping element 23 has a length of a few centimeters (about 7 cm to 10 cm) and is fixed with its free end to the binding plate 17 by means of a pivot joint 31. The damping cylinder 32 has two laterally projecting retaining arms 33. The ends of the holding arms 33 are each rotatably attached to a toggle lever 34. The knee levers 34 each have two legs 35, 36 which are at an angle of approximately 90 ° or slightly more. shut down. The knee lever 34 are pivotally mounted at its apex by means of a pivot joint 37 in a lateral recess of the binding plate 17. The leg 35 of the toggle lever 34 is approximately vertically upwards and at the free end of each holding arm 33 is fixed. The shorter leg 36 extends from the pivot 37 towards the rear end of the ski in an approximately horizontal direction. The shorter leg 36 is about half as long as the longer leg 34.

At the free end of the shorter leg 36, one end of a coupling rod 39 is fastened by means of a pivot joint 40. The other end of the vertically downward in the ski body 2 extending coupling rod 39 is pivotally mounted in the ski body 2.

If a ski end is bent upwards or downwards, the ski body bulges downward or upward in the central binding area 4 with respect to the binding plate 17, as a result of which the distance between the ski body 2 and the binding plate 17 is lengthened or shortened. This vertical movement of the ski body 2 with respect to the binding plate 17 is converted by the coupling rods 39 via the knee lever 34 in a horizontal translational movement of the damping cylinder 32, wherein the different lengths of the legs 35, 36 of the toggle lever 34, the path of movement of the coupling rod 39 in the double path of movement the damping cylinder 32 is implemented. The movement itself is damped by the damping element 23. Computer simulations have shown that this damping element 23 very effectively damps vibration of the first eigenmode. The movement of the damping cylinder 32 is not an exact translational movement, but by the guidance of the leg 34 a movement along a circular arc.

Since with this damping arrangement, the distance between the ski body 2 and the binding plate 17 is translated into a translational movement of the damping cylinder 32, a movement path of the damping cylinder 32 of approximately 10 mm to 15 mm is achieved with conventional deflections of the ski. Motions with such amplitudes can be very effectively damped with hydraulic shock absorbers. This damping arrangement preferably engages with the coupling rod 39 approximately centrally between the rear support column 18 and the front support column 19 of the binding plate 17, whereby a maximum movement path of the piston rod 26 with respect to the damping cylinder 32 is achieved. The damping element 23 is preferably designed such that the movement caused by the increase in the distance between the binding plate 17 and the ski body 2 between the piston rod 26 and the damping cylinder 32 (compression) is more strongly damped than the oppositely directed movement (rebounding). The rebound is preferably not damped at all. The damping characteristic of the compression is preferably individually adjustable.

When the compression is damped, the deflection of the ski at the swing lug is dampened, causing the ski to come to rest quickly at the beginning of the swing. On the other hand, the spring effect of the ski is fully available for initiating a new swing. This property of the damping element is also referred to by the inventors as a "soft landing".

As already described above, the trim rods are preferably fixed at about their longitudinal center. The fixation is effected for example by means of a bolt 41, which serves for fixing the coupling rod 39 in the ski body 2. The bolt 41 extends through the entire ski body 2 and at the ends of the bolt each one of the two coupling rods 39 is held. The bolt 41 also extends through the edge region of the hollow channels 8 and engages in a form-fitting manner in a corresponding recess in the trim rods 11. As a result, the trim rods are securely fixed in the longitudinal direction. In principle, other fixatives are also suitable, such as e.g. a tensionable clamp.

In the above embodiment, the trim rods 11 are coupled with a ball joint to the damping elements 21, 22. Instead of ball joints and elastomer coupling elements can be provided.

In the context of the invention, it is also possible to provide instead of hydraulic shock absorbers as damping elements 21, 22, 23 elastomer damper or friction damper, but hydraulic shock absorbers are preferred due to their better damping properties.

The invention has been explained above with reference to embodiments of alpine skis. However, it is also suitable for use in a cross-country ski, especially a cross-country ski for running in the classic style. Such cross-country skis are waxed in the central area with climbing wax. In dry snow, a hard wax and in very wet snow or an icy trail is applied as a climbing wax a sexton. The hard wax is generally spread over a longer richly applied as the sexton. When using a seeder, cross-country skis with a higher rigidity than when using a hard wax are preferred because the sexton should only come in contact with the snow or ice when the runner repels. Hard wax, on the other hand, can also be in contact with the snow during the sliding phase. By providing a recess according to the invention for receiving a trim rod, a cross-country ski can be adapted to the corresponding snow conditions.

LIST OF REFERENCE NUMBERS

1 Ski 21 damping element

2 ski body 22 damping element

3 bucket area 23 damping element

4 central binding area 24 piston rod

5 rear end 25 piston rod

Sliding surface 26 Piston rod

Steel edge 27 handwheel

Recess / hollow channel 28 bracket

End piece 29 bracket

10 threaded section 30 recess 1 trim rod 31 pivot joint 2 bearing 32 damping cylinder 3 bearing 33 retaining arm 4 threaded bush 34 toggle lever 5 eyelet 35 leg 6 shell 36 leg 7 binding plate 37 pivot 8 support column 38 recess 9 support column 39 coupling rod 0 swivel joint 40 swivel joint

41 bolts

Claims

claims

1. ski, in particular alpine skiing, comprising an elongated ski body and a sliding coating on the underside of the ski body, characterized in that the ski body (2) with at least one approximately longitudinally extending recess (8) and / or one or more in the longitudinal direction of the ski distributed bearing means (15) for releasably receiving a trim rod (11) is formed with a predetermined bending stiffness.

2. Ski according to claim 1, characterized in that at least one end of the trim rod (11) is movably mounted in the longitudinal direction of the ski.

3. Ski according to claim 1 or 2, characterized in that the recess (8) extends at least over 30% of the length of the ski.

4. Ski according to one of claims 1 to 3, characterized in that the recess (8) about the longitudinal center of the ski (1) is arranged centered.

5. Ski according to one of claims 1 to 4, characterized in that the recess forms an elongated hollow channel (8) with a constant cross-section.

6. Ski according to one of claims 1 to 4, characterized in that the cross-section of the recess (8) is circular, elliptical, oval, rectangular or square.

7. Ski according to one of claims 1 to 6, characterized in that the height of the recess (8) is greater than its width.

8. Ski according to one of claims 1 to 7, characterized in that a plurality of recesses (8) are provided.

9. Ski according to claim 8, characterized in that at least two of the recesses (8) are partially formed vertically offset from each other.

10. Ski according to one of claims 1 to 9, characterized in that the recess (8) is bounded by a plastic tube.

11. Ski according to claim 10, characterized in that the plastic tube is formed of a fiber-reinforced plastic and is integrally embedded in the ski body.

12. Ski according to claim 10 or 11, characterized in that at least two plastic pipes are provided, wherein one below and the other are arranged above a top flange.

13. Ski according to one of claims 1 to 12, characterized in that the recess in which the ski body (2) forming material is formed.

14. Ski according to one of claims 1 to 13, characterized in that the recess (8) in a skirt enclosing the ski body (16) is formed.

15. Ski according to claim 13 or 14, characterized in that the material in which the recess is formed, a fiber-reinforced plastic material.

16. Ski according to one of claims 1 to 15, characterized in that the flexural rigidity of all trim rods in the sum about 5 Nm ² to 150 Nm ²

17. Ski according to one of claims 1 to 16, characterized in that as bearing means bearings (12, 13) for holding one or both end areas of a trim rod (11) on the surface of the ski (1) are arranged.

18. Ski according to claim 17, characterized in that the bearings (12, 13) are fastened to different length positions on the ski.

19. Ski according to claim 17 or 18, characterized in that a bearing is provided for each trim rod, which is engageable with the trim rod in such a way that thereby the trim rod is fixed in its longitudinal position on the ski.

20. Ski according to one of claims 17 to 19, characterized in that the recess is a hollow channel which is open at both end regions and in each case one of the bearings in the front and rear region with respect. The hollow channel for fixing both of the hollow channel projecting portions of a Trim bar is arranged.

21. Ski according to one of claims 1 to 20, characterized in that the ski is waisted.

22. Ski according to one of claims 1 to 21, characterized in that the at least one end of the trim rod (11) by means of a damping element (21, 22) is coupled to the ski body (2).

23. Ski according to claim 22, characterized in that the damping element is coupled to the front end of the trim rod (11).

24. Ski according to claim 22 or 22, characterized in that the rear end of the trim rod (11) is coupled to the damping element (22).

25. Ski according to one of claims 22 to 24, characterized in that the trim rod is fixed axially either in the region of the ski center or in the region of the rear ski end on the ski body (2).

26. Ski according to one of claims 22 to 25, characterized in that the damping element is a hydraulic shock absorber.

27. Ski according to one of claims 22 to 26, characterized in that the damping element is an elastomer damper or friction damper.

28. Ski, in particular according to one of claims 1 to 27, with a ski body (2), one on the ski body (2) arranged binding plate (17) which is coupled by means of a fixed-lot storage on the ski (1), characterized characterized in that on the binding plate (17) a damping element (23) is arranged, which is coupled via a lever mechanism to the ski body (2), which changes the height difference between the ski body (2) and the binding plate (17) translates a horizontal translation movement, and the damping element (23) is arranged on the binding plate (17) such that the translation movement is counteracted.

29. Ski according to claim 28, characterized in that the fixed-lot storage by two rear support columns (18) and two front support columns (19) is formed, each coupled to the ski body (2) and to the binding plate (17) are, wherein either the attachment points of the front or rear support columns (18, 19) on the ski body or on the binding plate (17) are rigidly formed and the remaining connection points between the support columns (18, 19) and the ski body (2) and the binding plate ( 17) are articulated.

30. Ski according to claim 28 or 29, characterized in that the binding plate (17) is arranged at a distance from the ski body (2).

31. Ski according to one of claims 26 to 29, characterized in that the lever mechanism is coupled approximately in the longitudinal center of the binding plate (17) to the ski body (2).

32. Ski according to one of claims 28 to 31, characterized in that the connection points between the support columns (18, 19) and the ski body (2) in the bending-neutral region of the ski body (2) are located.

33. Ski according to one of claims 28 to 32, characterized in that the damping element (23) is adjustable.

34. Ski according to one of claims 28 to 32, characterized in that the damping element (23) attenuates an increase in the height difference between the ski body (2) and the binding plate (17) stronger than a reduction of this height difference.

35. Ski according to one of claims 28 to 34, characterized in that the lever mechanism has a toggle lever (34) which comprises two legs (35, 36), wherein the toggle lever (34) with its vertex pivotally mounted on the binding plate (17) is stored and the free end of one of the two

Leg (36) with a coupling rod (39) with the ski body (2) is connected and the free end of the other leg (35) is connected to the damping element (23).

36. Ski according to one of claims 28 to 35, characterized in that the damping element (23) is a hydraulic shock absorber.

37. Ski according to claim 36, characterized in that with the coupling rod (39) in connection leg (36) of the toggle lever (34) is shorter than the other leg (35) of the toggle lever (34).

38. Ski according to one of claims 22 to 37, characterized in that the damping element is an elastomer damper or friction damper.

39. trim rod for a ski according to one of claims 1 to 38, characterized in that the trim rod is an elongated, positively fit into the recess or the storage facilities (8) of the ski fitting body with a predetermined bending stiffness.

40. A trim rod according to claim 39, characterized in that the trim rod is formed over the entire longitudinal extent of a fiber-reinforced plastic.

41. A trim rod according to claim 39, characterized in that the trim bar is partially formed of materials of different bending stiffness.

42. A trim rod according to one of claims 39 to 41, characterized in that the trim rod has a sheath made of a soft elastic material.

43. trim rod according to one of claims 39 to 42, characterized in that the trim rod is a solid body.

44. trim rod according to one of claims 39 to 44, characterized in that the trim rod is formed as a hollow tube.

A trim bar according to any one of claims 39 to 44, characterized in that the trim bar has at least one section made of a heavy material, e.g. Lead or tungsten, is formed.

46. Ski according to one of claims 1 to 39, characterized by a trim bar according to one of claims 35 to 41.