EP2082788B1 - Alpine ski with adjustment means - Google Patents

Alpine ski with adjustment means Download PDF

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Publication number
EP2082788B1
EP2082788B1 EP09000417A EP09000417A EP2082788B1 EP 2082788 B1 EP2082788 B1 EP 2082788B1 EP 09000417 A EP09000417 A EP 09000417A EP 09000417 A EP09000417 A EP 09000417A EP 2082788 B1 EP2082788 B1 EP 2082788B1
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EP
European Patent Office
Prior art keywords
ski
blade
traction
tension
contact point
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Active
Application number
EP09000417A
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German (de)
French (fr)
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EP2082788A1 (en
Inventor
Bertrand Krafft
Gilles Silva
Christian Huyghe
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Salomon SAS
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Salomon SAS
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Publication of EP2082788A1 publication Critical patent/EP2082788A1/en
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00Skis or snowboards
    • A63C5/06Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/07Skis or snowboards with special devices thereon, e.g. steering devices comprising means for adjusting stiffness
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00Skis or snowboards
    • A63C5/04Structure of the surface thereof
    • A63C5/0405Shape thereof when projected on a plane, e.g. sidecut, camber, rocker
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00Skis or snowboards
    • A63C5/12Making thereof; Selection of particular materials

Definitions

  • the invention relates to a pair of skis whose construction is improved.
  • the choice of the characteristics of the ski in particular as regards its length, its geometry, its stiffness, the length and the height of its spatula depends on a certain number of criteria, such as the abilities of the skier in the discipline practiced, the quality of the snow, the nature of the activity (relaxation, sport, competition, freeride, off-piste).
  • skis are designed for either a specific use corresponding to a small number of criteria or for general use.
  • the ski becomes very difficult to use as soon as the conditions of use are different from those for which it was designed.
  • the ski is designed for general use, its operation is never optimal.
  • skis have a satisfactory operation regardless of the snow conditions, whether it is a damn snow, hard, as found on the slopes at the beginning of the day, or that it is soft snow, almost melted, as it appears at the end of the day in the spring.
  • the document FR 2,448,360 proposes a device allowing to adjust on the spot the characteristics of a ski.
  • This device allows to modify the camber of the ski and includes means varying the flexibility and elasticity of the ski.
  • This device is complex and requires the establishment of elements weighing on the ski which thereby modifies the behavior.
  • this device requires the presence of a cable having a vertical arrow between two points placed between the middle part of the ski and the spatula contact point. We then have large elements that can interfere with the practice of skiing and that give an unsightly appearance to the ski.
  • the object of the present invention is to overcome the disadvantages of the prior art.
  • the object of the present invention is to provide a ski whose characteristics can be adjusted according to several criteria and in particular the quality of the snow.
  • Another object of the present invention is to provide a ski having means for adjusting the characteristics, which are integrated in the ski.
  • Another object of the present invention is to provide a ski equipped with means for adjusting these characteristics while maintaining a satisfactory aesthetic.
  • Another object of the present invention is to provide a ski whose geometry can be adjusted, especially the spatula height without the rigidity being modified.
  • Another object of the present invention is to provide a ski whose geometry can be adjusted, in particular the contact zone of the front part of the ski with a flat surface on which it is placed.
  • the contact area of the front part of the ski is also called the spatula contact point.
  • Another object of the present invention is to provide a ski which has adjustment means allowing a user to adapt said ski to the conditions in which he wish to practice alpine skiing and in particular, to have a "track position" and an "off-piste position”.
  • a ski comprising a structural assembly, gliding means and means of decoration and protection; said structural assembly comprising at least one lower reinforcement, at least one upper reinforcement and an intermediate structure placed between the upper reinforcement and the lower reinforcement; said ski having longitudinally a cambered profile such that when said gliding means are placed on a flat surface the ski rests on a spatula contact point and a heel contact point; said ski further comprising traction means exerting traction between a first anchorage placed beyond the spatula contact zone and a second anchorage placed below said spatula contact zone; said traction means being placed for a greater part of their length below said decoration and protection means; said traction means being placed for a greater part of their length above the neutral fiber of said ski.
  • said traction means further comprise a traction member for placing said second anchor in at least two positions separated longitudinally from each other by a distance D.
  • the first position of the second anchorage corresponds to the "track position", while the second position corresponds to the "off-track position”.
  • Said structural assembly constitutes the "motor" of the ski because the cooperation between the upper and lower reinforcements and the intermediate structure defines the mechanical behavior of the ski, and in particular the flexural behavior. Since skiing at a certain thickness, when describing the bending behavior of the ski, a neutral fiber can be defined.
  • the neutral fiber is the area of the ski when the ski flexes only works in flexion. All areas within or beyond the neutral fiber work in compression or traction.
  • said traction means are placed for a greater part of their length above said upper reinforcement.
  • the first anchor is fixed by fasteners to said structural assembly or by composite fabrics.
  • said distance D is between 0.5 mm and 10 mm, preferably between 1 mm and 7 mm.
  • said traction means comprise a metal blade or made of another material.
  • said blade is placed for a greater part of its length above said upper reinforcement.
  • said traction means comprise a traction member responsible for tensioning the traction means and thus generating the displacement of the second anchorage from the first position (track position) to the second position (off-track position).
  • Said pulling member is capable of producing a force greater than 70 daN, preferably greater than 100 daN.
  • said traction means comprise elastic means whose modulus of elasticity is high.
  • these elastic means comprise a spring
  • a spring whose stiffness constant is greater than 5000 Nm -1 , preferably greater than 10,000 Nm -1 , will be chosen.
  • said decoration and protection means comprise a window through which said blade can project.
  • a filling is placed between said decoration and protection means and said upper reinforcement, and a tunnel is formed in said filling so as to receive said blade.
  • the figure 1 represents a ski according to a first embodiment of the invention.
  • the ski 1 is equipped with a safety fastening device 2, which is placed in the central zone of the ski.
  • the ski comprises a structural assembly, gliding means and means of decoration and protection.
  • Said structural assembly constitutes the "motor" of the ski.
  • the structural assembly comprises at least one lower reinforcement, at least one upper reinforcement and an intermediate structure placed between said lower reinforcement and said upper reinforcement.
  • the cooperation between the upper and lower reinforcements and the intermediate structure constitutes a sandwich structure, which defines the mechanical behavior of the ski, and in particular the flexural behavior thereof.
  • the gliding means are constituted by a sole, made of a material that promotes sliding and a pair of side edges, which are mostly made of a metallic material.
  • the means of decoration and protection cover the entire upper part of the ski. They may or may not also intervene in the mechanical behavior of the ski.
  • the intermediate structure also called nucleus, can be realized in different ways. It can be formatted before putting in the mold, we speak then of ski pasted. But it can also be shaped during injection into the mold. This is called injected ski.
  • This intermediate structure has a significant thickness, of the order of cm. This thickness is not constant over the entire length of the ski. In general it reaches its maximum in the central area of the ski, in the area where are placed the safety bindings 2, and it is thinner at the ends of the ski, at the spatula 5 and at the heel 27.
  • the ski 1 When resting on a flat surface 28, the ski 1 is in contact with this surface 28 only in two areas: the PCS 3 spatula contact point and the PCT 4 heel contact point. Between the spatula contact point 3 and the heel contact point 4, the profile of the lower surface of the ski describes a concave curve, this is called the camber of the ski. Beyond the point of contact spatula 3 towards the front of the ski is the spatula survey 5. Beyond the heel contact point 4 and towards the rear of the ski is the heel 27. The heel can or not to be relieved.
  • a neutral fiber can be defined.
  • FIGS. 2, 3 and 4 show how the neutral fiber of the ski is defined. Each of these figures schematically show a portion of the ski 1 in different bending states.
  • the ski 1 undergoes flexural deformation. This is typically the case when the skier, using his weight and the muscular force of his legs exerts a strong pressure on the ski. In this case since the ski has a certain thickness the upper portion thereof will work in compression while the lower portion thereof will work in tension. The boundary between these two zones is an area that does not work in compression or traction. This zone is called the neutral fiber 15. The zone above the neutral fiber 15 is called the supra-fiber-neutral volume 16, whereas the zone below this neutral fiber 15 is called the infra-fiber-neutral volume. 17.
  • the elasticity of the overall structure will generate a deformation of the ski against flexion. This is what is represented at figure 4 .
  • the supra-fiber-neutral volume 16 works in tension while the infra-fiber-neutral volume 17 works in compression.
  • the ski according to the invention comprises traction means 6 which exert traction between a first anchor 13 and a second anchor 14.
  • the first anchor 13 is placed at the spatula 5 beyond the spatula contact point 3.
  • second anchor 14 is placed in turn below said contact point spatula 3.
  • the traction means 6 can be in "track position", this is the position shown in FIG. figure 1 and in an "off-track position".
  • “off-track position” the second anchor 14 is moved back by a distance D relative to the position that it occupies in "track position".
  • Said distance D is between 0.5 mm and 10 mm.
  • the traction means 6 comprise a blade 24 which connects the first anchor 13 to the second anchor 14.
  • the recoil of the second anchor 14 has the effect of raising the spatula 5.
  • the traction means 6 are placed in the supra-fiber-neutral volume 16, that is to say above the neutral fiber 15.
  • the traction means are essentially integrated into the ski 1, that is to say placed under the means of decoration and protection 8.
  • FIGs 5 and 6 describe the front parts of the ski described in figure 1 respectively in “track position” and in “off-track position”. These two figures are partially cut perspective views.
  • the ski 1 comprises a structural assembly 7, gliding means 9 and means of decoration and protection 8.
  • gliding means 9 are the elements that ensure the ski-snow interface and that they are both elements promoting sliding; the sole 26, as well as important elements for driving the ski; the edges 25.
  • the structural assembly 7 guarantees the ski its mechanical characteristics, flexibility, elasticity, etc .
  • the structural assembly 7 comprises one or more lower reinforcements 10, one or more upper reinforcements 11 and an intermediate structure 12.
  • the structural assembly 7 is covered by the protective and decorative means 8. These means come into contact with the edges 25 and seal the assembly. In order to give a better attractiveness of the ski, these means are the support of the decoration of the ski. It should be noted that the protection and decoration means may also comprise side edges which bear on the edges and / or on the upper reinforcement (not shown).
  • the filling 19 may for example be made of polyurethane foam or any equivalent material. It can be made of the same material as the intermediate structure 12. The filling being placed above the upper reinforcement, it will have almost no effect on the mechanical characteristics of the ski, it is not part of the overall structure 7.
  • the filling is traversed in the longitudinal direction by a tunnel 29 in which the blade 24 passes traction means 6.
  • the blade 24 is made of a metal foil of a width for example between 5 and 25 mm for a thickness included between 0.4 and 1 mm. In the example described, the blade is 12.7 mm wide and 0.5 mm thick.
  • the blade 24 is likely to deform in bending in a direction perpendicular to its greater width but does not deform substantially when it is subjected to traction in the direction of its length.
  • the blade is not necessarily made by a metal click, other materials may also be suitable such as carbon.
  • the length of the blade 24 depends on the length of the ski on which the traction means 6 are located. In any case, the blade 24 extends from the first anchor 13, which is placed at the spatula 5 beyond the spatula contact point 3 (PCS), to the second anchor 14, which is located below this point (PCS). Preferably, the second anchor 14 is at the level of the safety fasteners on the central part of the ski 1.
  • the first anchor 13 fixedly secures the blade 24 to the ski, preferably to the structural assembly.
  • the first anchorage 13 is constituted by a screw assembly 22 / insert 23.
  • the threaded insert 23 is placed under the upper reinforcement 11. It comprises a plate, equipped with claws which penetrates the reinforcement 11, avoiding rotation of the insert 23. It also comprises a threaded barrel, which passes through the upper reinforcement 11, the blade 24, the filling 19 and possibly all or part of the protection and decoration means 8.
  • the figure 8 discloses an alternative embodiment of the first anchoring means 13.
  • the blade 24 comprises at its end a slot 30 through which passes a panel 31 of fiber fabrics of the same nature as the fabric used for the upper reinforcement 11.
  • the panel 31 as the upper reinforcement 11 is embedded in a resin matrix which after cross-linking solidifies the whole. The final anchoring of the blade on the upper reinforcement is then performed.
  • the blade 24 is not bonded either to the upper reinforcement 11 or the filling 19.
  • it may be provided to fill the walls of the tunnel 29 and the upper reinforcement 11 with a layer or a product which reduces the resistance to friction.
  • the figure 6 represents a view similar to the figure 5 when the ski according to the invention is in "off-piste position", whereas at the figure 5 this one was in "track position".
  • the amplitude of this accentuation can be evaluated by measuring the distance separating the ski sole from a horizontal surface on which it rests.
  • this distance is by definition zero when the ski is in "track position".
  • this same point 3 is moved upwards by a value of between 2 and 15 mm, in particular equal to 5 mm.
  • the recoil of the spatula contact point its amplitude can be evaluated by measuring the length L separating the spatula contact point 3 (when the ski is in the track position) from the remote point of contact 47.
  • the point of contact back 47 corresponds to the area of the sole of the front portion of the ski which is in contact with a flat surface on which the ski is placed when the latter is in "off-track position".
  • the length L is between 20 mm and 500 mm. Good results are obtained, that is to say a good behavior of the ski in "off-track position" when the length L is between 50 mm and 300 mm.
  • the figure 9 represents a view from above of the traction member 32 which exerts traction on the blade 24 of the traction means 6.
  • the traction member 32 is fixed on the ski in front of the safety fastener. It is constituted by a yoke 38 fixed by two screws on the ski. This screed is made by folding a metal sheet.
  • the yoke 38 comprises two axis supports projecting perpendicularly from the base thereof, which is pressed against the upper surface of the ski.
  • a lever 37 comprising two branches and a pallet is pivotally mounted on the yoke 38, each of the branches being pivotally mounted relative to one of the axis supports.
  • the two branches are connected to one another by means of the pallet which serves as means for gripping and actuating the traction member.
  • a tie 36 is placed between the two branches of the lever. It is connected by one of its ends to the lever 37 via a pivoting axis 41.
  • the tie rod 36 is connected by the other of its ends and to a loop 35.
  • the connection between the tie rod 36 and the Loop 35 is sliding and is via a plate 42, which is integral with the tie rod and which is slidable in the loop 35.
  • the sliding amplitude of the plate 42 is very small and is constrained by a spring 44 with high modulus of elasticity.
  • a light 33 formed in the protective and decorative means 8 allows the blade 24 to exit the tunnel 29 and have its end accessible.
  • a rack 34 is fixed on this end by means of a screw.
  • the rack 34 comprises at least one tooth, but may include 2, 3 or more.
  • the figure 10 shows a side view of the traction member before handling.
  • the rod 43 is placed in the hollow of one of the teeth of the rack 34.
  • the user exerts a pressure on the lever 37, which is converted into a traction force on the blade 24.
  • This traction force generates a displacement of the blade having a distance equal to D.
  • the toggle mechanism constituted by the non-alignment of the three axes: rod 43, clevis pin support 38 and pivoting shaft 41; the tensioning of the blade is maintained as long as the lever remains in the low position.
  • the low position of the lever 37 is the position which is represented at the figure 11 .
  • the lever allows a multiplication of the force that the user will have to put for the actuation of the traction means.
  • the force required to put the traction means in "off-track position" is between 70 daN and 160 daN.
  • the traction member comprises elastic means which work in the longitudinal direction of the ski and which have a strong modulus of elasticity.
  • These elastic means are, in the embodiment described, in the form of the spring 44.
  • the stiffness constant of the spring is greater than 5000 N / m, preferably greater than 10000 N / m.
  • the elastic means serve several functions. In particular, they absorb shock when the ski goes against the arrow. On the other hand, given the fact that the displacement of the second anchor point is relatively small, the slight laxity by the elastic means is necessary to properly operate the traction member.
  • the rack 34 has several teeth spaced apart from each other. It is possible to provide a tooth which is positioned in such a way that when the rod 43 is engaged therein, no tension is exerted on the blade 24. Thus, even when the traction means are in "track position", the lever 37 is also in a folded position against the upper surface of the ski 1.
  • the traction element represented in figures 9 , 10 and 11 is only one example of a traction member that can be used in the context of the invention.
  • a traction member must be able to be placed in two stable positions, a free position and a position in tension.
  • the free position corresponds to the "track position" of the traction means. In this position, the traction member does not exert any force on the blade 24.
  • the latter is then integrally attached to the structural assembly 7 of the ski 1 at the first anchor 13 but free to slide relative thereto at any other point of its length, and particularly at the second anchor 14.
  • the blade plays little or no role in the behavior of the ski, in its mechanical characteristics.
  • the traction means have an effect when the ski is working in counter-flexion, that is to say when the ends of the ski (spatula, heel) go down with respect to the central part. Indeed the blade then behaves like an additional reinforcement working in tension. This effort will be even more important in "off-track position” than in "track position”. Moreover, in the case where in "track position” is not locked in position the second anchor 14 and the blade 24, and that it retains the ability to slide, the effect of the traction means on the flexibility of ski are also insignificant in counter-flexion.
  • FIGS. 12 and 13 represent a second embodiment of the invention. This embodiment differs from the first embodiment only in the presence of a flexible portion in the protection and decoration means. The description in detail of all the elements will not be repeated here because of the similarities that exist with the first embodiment.
  • the ski 1 comprises a structural assembly 7, gliding means 9 and protection and decoration means 8.
  • the traction means 6 are arranged between a first anchor 13, which is placed beyond the spatula contact point 3 ( PCS), and a second anchor 14 placed below this same point.
  • the traction means 6 are arranged in the neutral supra-fiber volume 16, that is to say above the neutral fiber 15.
  • the greater part of the length of the traction means 6, which is constituted by a blade 24, is located above the structural assembly 7 of the ski 1, in other words above the "motor" of the ski.
  • the protection and decoration means are pierced by a window 45.
  • the window 45 is placed in the most curved zone of the front part of the ski. This is the birth zone of the spatula.
  • the window has a length of between 10 and 30 cm for a width between the width of the blade 24 and the width of the ski 1.
  • the window 40 is covered by a screen 46 so as to guarantee sealing and to mask the blade.
  • the screen 41 is made of an extensible and elastic material.
  • the ski is represented in "track position".
  • the blade 24, which is not in tension, is in the tunnel 29.
  • the screen 46 is placed in continuity with the protection and decoration means 8.
  • the ski is represented in "off-piste position".
  • the blade 24 is put in traction by the traction member. Due to the presence of the window 45, the blade 24 leaves the contact of the structural assembly 7 in the area of the window 45. The blade 24 protrudes from the protection and decoration means through the window 45. remains under the screen 46, which stretches to accompany the movement.
  • the traction on the blade 24 is more effective for raising the spatula because the blade can, when it is under tension, be placed in a more direct profile between the first and the second anchorage.
  • the blade 24 is placed on the rope in the window 45.
  • the blade 24 is placed on the upper reinforcement over the entire length thereof.
  • Yet other embodiments of the invention pass the blade below the upper reinforcement over a small part of its length, it being understood that most of the length of the blade remains above the neutral fiber and preferably above the upper reinforcement.
  • Such embodiments allow to have non-linear deformation zones. In areas where the blade is above the reinforcement, the deformation of the ski, in off-track position, is important while in areas where the blade is below the reinforcement, the deformation is lower, or even imperceptible.
  • Another way allows us to have nonlinear deformations. This is to maintain the blade above the upper reinforcement over its entire length, and to place over, in some places, a punctual reinforcement.
  • the one or more point reinforcements may have a length of 2 cm and 20 cm.

Abstract

The ski (1) has a structural assembly comprising an intercalated structure placed between a lower reinforcement and an upper reinforcement. A traction unit (6) is constituted by a metallic blade (24) and exerts traction between an anchorage (13) placed beyond a spatula contact point (3) and another anchorage (14) placed below the spatula contact point. The traction unit is placed below protection and decoration units for a large portion of a length of the traction unit. The traction unit is placed above a neutral fiber (15) of the ski for the large portion of the length of the traction unit.

Description

L'invention concerne une paire de skis dont la construction est améliorée.The invention relates to a pair of skis whose construction is improved.

Le choix des caractéristiques du ski, notamment pour ce qui concerne sa longueur, sa géométrie, sa raideur, la longueur et la hauteur de sa spatule est fonction d'un certain nombre de critères, tels que les capacités du skieur dans la discipline pratiquée, la qualité de la neige, la nature de l'activité (détente, sport, compétition, freeride, hors piste).The choice of the characteristics of the ski, in particular as regards its length, its geometry, its stiffness, the length and the height of its spatula depends on a certain number of criteria, such as the abilities of the skier in the discipline practiced, the quality of the snow, the nature of the activity (relaxation, sport, competition, freeride, off-piste).

En règle générale les skis sont conçus soit pour une utilisation spécifique correspondant à un petit nombre de critères, soit pour une utilisation générale. Lorsqu'il est conçu pour une utilisation spécifique, le ski devient très difficilement utilisable dès que les conditions d'utilisation sont différentes de celles pour lesquelles il a été conçu. A l'opposé lorsque le ski est conçu pour une utilisation générale, son fonctionnement n'est jamais optimal.In general, skis are designed for either a specific use corresponding to a small number of criteria or for general use. When designed for a specific use, the ski becomes very difficult to use as soon as the conditions of use are different from those for which it was designed. In contrast, when the ski is designed for general use, its operation is never optimal.

On comprend qu'il serait souhaitable que les skis aient un fonctionnement satisfaisant quelles que soient les conditions de neige, qu'il s'agisse d'une neige damnée, dure, telle qu'on en trouve sur les pistes en début de journée, ou qu'il s'agisse d'une neige molle, presque fondue, telle qu'elle se présente en fin de journée au printemps.We understand that it would be desirable that the skis have a satisfactory operation regardless of the snow conditions, whether it is a damn snow, hard, as found on the slopes at the beginning of the day, or that it is soft snow, almost melted, as it appears at the end of the day in the spring.

A cet effet, le document FR 2 448 360 propose un dispositif permettant de régler sur place les caractéristiques d'un ski. Ce dispositif permet de modifier la cambrure du ski et comprend des moyens faisant varier la flexibilité et l'élasticité du ski.For this purpose, the document FR 2,448,360 proposes a device allowing to adjust on the spot the characteristics of a ski. This device allows to modify the camber of the ski and includes means varying the flexibility and elasticity of the ski.

Ce dispositif est complexe et nécessite la mise en place d'éléments pesant sur le ski qui de ce fait en modifie le comportement. D'autre part ce dispositif nécessite la présence d'un câble présentant une flèche verticale entre deux points placés entre la partie médiane du ski et le point de contact spatule. On dispose alors d'éléments volumineux qui peuvent gêner la pratique du ski et qui donnent une apparence peu esthétique au ski.This device is complex and requires the establishment of elements weighing on the ski which thereby modifies the behavior. On the other hand this device requires the presence of a cable having a vertical arrow between two points placed between the middle part of the ski and the spatula contact point. We then have large elements that can interfere with the practice of skiing and that give an unsightly appearance to the ski.

L'objet de la présente invention est de remédier aux inconvénients de l'art antérieur.The object of the present invention is to overcome the disadvantages of the prior art.

L'objectif de la présente invention est de fournir un ski dont on peut régler les caractéristiques en fonction de plusieurs critères et notamment la qualité de la neige.The object of the present invention is to provide a ski whose characteristics can be adjusted according to several criteria and in particular the quality of the snow.

Un autre objectif de la présente invention est de fournir un ski présentant des moyens de réglages des caractéristiques, lesquelles sont intégrées dans le ski.Another object of the present invention is to provide a ski having means for adjusting the characteristics, which are integrated in the ski.

Un autre objectif de la présente invention est de fournir un ski équipé de moyens permettant le réglage de ces caractéristiques tout en gardant une esthétique satisfaisante.Another object of the present invention is to provide a ski equipped with means for adjusting these characteristics while maintaining a satisfactory aesthetic.

Un autre objectif de la présente invention est de fournir un ski dont on peut régler la géométrie, notamment la hauteur de spatule sans que la rigidité en soit modifiée.Another object of the present invention is to provide a ski whose geometry can be adjusted, especially the spatula height without the rigidity being modified.

Un autre objectif de la présente invention est de fournir un ski dont on peut régler la géométrie, notamment la zone de contact de la partie avant du ski avec une surface plane sur laquelle il est posé. La zone de contact de la partie avant du ski est également appelée point de contact spatule.Another object of the present invention is to provide a ski whose geometry can be adjusted, in particular the contact zone of the front part of the ski with a flat surface on which it is placed. The contact area of the front part of the ski is also called the spatula contact point.

Un autre objectif de la présente invention est de fournir un ski qui dispose de moyens de réglage permettant à un utilisateur d'adapter ledit ski aux conditions dans lesquelles il souhaite pratiquer le ski alpin et notamment, d'avoir une "position piste" et une "position hors piste".Another object of the present invention is to provide a ski which has adjustment means allowing a user to adapt said ski to the conditions in which he wish to practice alpine skiing and in particular, to have a "track position" and an "off-piste position".

L'objectif de l'invention est atteint par la fourniture d'un ski comportant un ensemble structurel, des moyens de glisse et des moyens de décoration et de protection; ledit ensemble structurel comprenant au moins un renfort inférieur, au moins un renfort supérieur et une structure intercalaire placée entre le renfort supérieur et le renfort inférieur; ledit ski ayant longitudinalement un profil cambré tel que lorsque lesdits moyens de glisse sont posés sur une surface plane le ski repose sur un point de contact spatule et un point de contact talon; ledit ski comportant en outre des moyens de traction exerçant une traction entre un premier ancrage placé au-delà de la zone de contact spatule et un deuxième ancrage placé en deçà de ladite zone de contact spatule; lesdits moyens de traction étant placés pour une plus grande partie de leur longueur en dessous desdits moyens de décoration et de protection; lesdits moyens de traction étant placés pour une plus grande partie de leur longueur au dessus de la fibre neutre dudit ski. De préférence, lesdits moyens de traction comportent en outre un organe de traction permettant de placer ledit deuxième ancrage dans au moins deux positions séparées longitudinalement l'une de l'autre d'une distance D.The object of the invention is achieved by providing a ski comprising a structural assembly, gliding means and means of decoration and protection; said structural assembly comprising at least one lower reinforcement, at least one upper reinforcement and an intermediate structure placed between the upper reinforcement and the lower reinforcement; said ski having longitudinally a cambered profile such that when said gliding means are placed on a flat surface the ski rests on a spatula contact point and a heel contact point; said ski further comprising traction means exerting traction between a first anchorage placed beyond the spatula contact zone and a second anchorage placed below said spatula contact zone; said traction means being placed for a greater part of their length below said decoration and protection means; said traction means being placed for a greater part of their length above the neutral fiber of said ski. Preferably, said traction means further comprise a traction member for placing said second anchor in at least two positions separated longitudinally from each other by a distance D.

La première position du deuxième ancrage correspond à la "position piste", tandis que la deuxième position correspond à la "position hors-piste".The first position of the second anchorage corresponds to the "track position", while the second position corresponds to the "off-track position".

Ledit ensemble structurel constitue le "moteur" du ski car la coopération entre les renforts supérieurs et inférieurs et la structure intercalaire définit le comportement mécanique du ski, et notamment le comportement en flexion. Etant donné que le ski à une certaine épaisseur, lorsqu'on décrit le comportement en flexion du ski, on peut définir une fibre neutre. La fibre neutre est la zone du ski lorsque le ski fléchit ne travaille qu'en flexion. Toutes les zones qui se trouvent en deçà ou au delà de la fibre neutre travaillent en compression ou en traction.Said structural assembly constitutes the "motor" of the ski because the cooperation between the upper and lower reinforcements and the intermediate structure defines the mechanical behavior of the ski, and in particular the flexural behavior. Since skiing at a certain thickness, when describing the bending behavior of the ski, a neutral fiber can be defined. The neutral fiber is the area of the ski when the ski flexes only works in flexion. All areas within or beyond the neutral fiber work in compression or traction.

Avantageusement, lesdits moyens de traction sont placés pour une plus grande partie de leur longueur au dessus dudit renfort supérieur.Advantageously, said traction means are placed for a greater part of their length above said upper reinforcement.

Avantageusement, le premier ancrage est fixé par visserie audit ensemble structurel ou par des tissus composites.Advantageously, the first anchor is fixed by fasteners to said structural assembly or by composite fabrics.

Avantageusement ladite distance D est comprise entre 0,5 mm et 10 mm, de préférence comprise entre 1 mm et 7 mm.Advantageously, said distance D is between 0.5 mm and 10 mm, preferably between 1 mm and 7 mm.

Avantageusement, lesdits moyens de traction comprennent une lame métallique ou faite d'un autre matériau.Advantageously, said traction means comprise a metal blade or made of another material.

Avantageusement, ladite lame est placée pour une plus grande partie de sa longueur au dessus dudit renfort supérieur.Advantageously, said blade is placed for a greater part of its length above said upper reinforcement.

Avantageusement, lesdits moyens de traction comprennent un organe de traction chargé de mettre en tension les moyens de traction et ainsi générer le déplacement du deuxième ancrage depuis la première position (position piste) vers la deuxième position (position hors-piste). Ledit organe de traction est capable de produire un effort supérieur à 70 daN, de préférence supérieur à 100 daN.Advantageously, said traction means comprise a traction member responsible for tensioning the traction means and thus generating the displacement of the second anchorage from the first position (track position) to the second position (off-track position). Said pulling member is capable of producing a force greater than 70 daN, preferably greater than 100 daN.

Avantageusement, lesdits moyens de traction comprennent des moyens élastiques dont le module d'élasticité est élevé. A titre d'exemple dans le cas ou ces moyens élastiques comprennent un ressort, on choisira un ressort dont la constante de raideur est supérieure à 5000 N.m-1, de préférence supérieure à 10 000 N.m-1.Advantageously, said traction means comprise elastic means whose modulus of elasticity is high. By way of example, in the case where these elastic means comprise a spring, a spring whose stiffness constant is greater than 5000 Nm -1 , preferably greater than 10,000 Nm -1 , will be chosen.

Avantageusement, lesdits moyens de décorations et de protections comprennent une fenêtre au travers de laquelle ladite lame peut faire saillie.Advantageously, said decoration and protection means comprise a window through which said blade can project.

Avantageusement, un remplissage est placé entre lesdits moyens de décoration et de protection et ledit renfort supérieur, et un tunnel est ménagé dans ledit remplissage de façon à recevoir ladite lame.Advantageously, a filling is placed between said decoration and protection means and said upper reinforcement, and a tunnel is formed in said filling so as to receive said blade.

L'invention sera mieux comprise à la lecture de la description qui suit, à laquelle est annexé le dessin dans lequel:

  • La figure 1 est un ski selon l'invention.
  • Les figures 2, 3 et 4 sont des vues partielles et schématiques du ski représenté à la figure 1.
  • La figure 5 est une vue en perspective de la partie avant du ski représenté à la figure 1, lorsque ce dernier est réglé en position piste.
  • La figure 6 est une vue similaire à la figure 5 lorsque le ski est réglé en position hors piste.
  • La figure 7 est une vue de détail du premier ancrage de la lame.
  • La figure 8 est une vue de détail d'une version alternative du premier ancrage de la lame.
  • La figure 9 est une vue de dessus représentant l'organe de traction.
  • Les figures 10 et 11 sont des vues de coté de l'organe de traction.
  • La figure 12 est une vue en perspective de la partie avant d'un ski selon un deuxième mode de réalisation de l'invention, lorsque ce dernier est réglé en "position piste".
  • La figure 13 est une vue similaire à la figure 12 lorsque le ski est réglé en "position hors piste".
The invention will be better understood on reading the description which follows, to which is appended the drawing in which:
  • The figure 1 is a ski according to the invention.
  • The Figures 2, 3 and 4 are partial and schematic views of the ski represented in figure 1 .
  • The figure 5 is a perspective view of the front portion of the ski shown at figure 1 , when the latter is set to track position.
  • The figure 6 is a view similar to the figure 5 when the ski is set to off-piste.
  • The figure 7 is a detail view of the first anchorage of the blade.
  • The figure 8 is a detail view of an alternative version of the first anchor of the blade.
  • The figure 9 is a top view showing the traction member.
  • The Figures 10 and 11 are side views of the traction member.
  • The figure 12 is a perspective view of the front portion of a ski according to a second embodiment of the invention, when the latter is set in "track position".
  • The figure 13 is a view similar to the figure 12 when the ski is set to "off-piste position".

La figure 1 représente un ski selon un premier mode de réalisation de l'invention. Le ski 1 est équipé d'un dispositif de fixation de sécurité 2, lequel est placé dans la zone centrale du ski. De manière connue le ski comporte un ensemble structurel, des moyens de glisse et des moyens de décoration et de protection. Ledit ensemble structurel constitue le "moteur" du ski. L'ensemble structurel comprend-au moins un renfort inférieur, au moins un renfort supérieur et une structure intercalaire placée entre ledit renfort inférieur et ledit renfort supérieur. La coopération entre les renforts supérieurs et inférieurs et la structure intercalaire constitue une structure sandwich, laquelle définit le comportement mécanique du ski, et notamment le comportement en flexion de celui-ci. Les moyens de glisse sont constitués par une semelle, réalisée dans un matériau qui favorise la glisse et une paire de carres latérales, lesquels sont la plupart du temps réalisés dans un matériau métallique. Les moyens de décoration et de protection recouvrent toute la partie supérieure du ski. Ils peuvent ou non également intervenir dans le comportement mécanique du ski. La structure intercalaire, également appelée noyau, peut être réalisée de différentes façons. Elle peut être mise en forme avant la mise dans le moule, on parle alors de ski collé. Mais elle peut également être mise en forme lors de l'injection dans le moule. On parle alors de ski injecté. Cette structure intercalaire a une épaisseur non négligeable, de l'ordre du cm. Cette épaisseur n'est pas constante sur toute la longueur du ski. En général elle atteint son maximum dans la zone centrale du ski, dans la zone où sont placées les fixations de sécurité 2, et elle est plus fine aux extrémités du ski, au niveau de la spatule 5 et au niveau du talon 27.The figure 1 represents a ski according to a first embodiment of the invention. The ski 1 is equipped with a safety fastening device 2, which is placed in the central zone of the ski. In known manner the ski comprises a structural assembly, gliding means and means of decoration and protection. Said structural assembly constitutes the "motor" of the ski. The structural assembly comprises at least one lower reinforcement, at least one upper reinforcement and an intermediate structure placed between said lower reinforcement and said upper reinforcement. The cooperation between the upper and lower reinforcements and the intermediate structure constitutes a sandwich structure, which defines the mechanical behavior of the ski, and in particular the flexural behavior thereof. The gliding means are constituted by a sole, made of a material that promotes sliding and a pair of side edges, which are mostly made of a metallic material. The means of decoration and protection cover the entire upper part of the ski. They may or may not also intervene in the mechanical behavior of the ski. The intermediate structure, also called nucleus, can be realized in different ways. It can be formatted before putting in the mold, we speak then of ski pasted. But it can also be shaped during injection into the mold. This is called injected ski. This intermediate structure has a significant thickness, of the order of cm. This thickness is not constant over the entire length of the ski. In general it reaches its maximum in the central area of the ski, in the area where are placed the safety bindings 2, and it is thinner at the ends of the ski, at the spatula 5 and at the heel 27.

Lorsqu'il repose sur une surface plane 28, le ski 1 n'est au contact de cette surface 28 que dans deux zones : le point de contact spatule PCS 3 et le point de contact talon PCT 4. Entre le point de contact spatule 3 et le point de contact talon 4, le profil de la surface inférieure du ski décrit une courbe concave, c'est ce qu'on appelle le cambre du ski. Au-delà du point de contact spatule 3 vers l'avant du ski se trouve le relevé spatule 5. Au-delà du point de contact talon 4 et en direction de l'arrière du ski se trouve le talon 27. Le talon peut ou ne pas être relevé.When resting on a flat surface 28, the ski 1 is in contact with this surface 28 only in two areas: the PCS 3 spatula contact point and the PCT 4 heel contact point. Between the spatula contact point 3 and the heel contact point 4, the profile of the lower surface of the ski describes a concave curve, this is called the camber of the ski. Beyond the point of contact spatula 3 towards the front of the ski is the spatula survey 5. Beyond the heel contact point 4 and towards the rear of the ski is the heel 27. The heel can or not to be relieved.

Etant donné que le ski a une certaine épaisseur, lorsqu'on décrit le comportement en flexion de celui-ci, on peut définir une fibre neutre.Since the ski has a certain thickness, when the bending behavior of the ski is described, a neutral fiber can be defined.

Les figures 2, 3 et 4 montrent comment est définie la fibre neutre du ski. Chacune de ces figures montrent schématiquement une portion du ski 1 dans différents états de flexion.The Figures 2, 3 and 4 show how the neutral fiber of the ski is defined. Each of these figures schematically show a portion of the ski 1 in different bending states.

A la figure 2 le ski est au repos. Aucune force ne s'exerce sur celui-ci.To the figure 2 the ski is at rest. No force is exerted on this one.

A la figure 3 le ski 1 subit une déformation en flexion. C'est typiquement le cas lorsque le skieur, utilisant son poids et la force musculaire de ses jambes exerce une forte pression sur le ski. Dans ce cas étant donné que le ski a une certaine épaisseur la portion supérieure de celui-ci va travailler en compression alors que la portion inférieure de celui-ci va travailler en traction. La frontière entre ces deux zones est une zone qui ne travaille ni en compression ni en traction. On appelle cette zone la fibre neutre 15. La zone située au-dessus de la fibre neutre 15 est appelée volume supra-fibre-neutre 16, tandis que la zone située en dessous de cette fibre neutre 15 est appelée volume infra-fibre-neutre 17.To the figure 3 the ski 1 undergoes flexural deformation. This is typically the case when the skier, using his weight and the muscular force of his legs exerts a strong pressure on the ski. In this case since the ski has a certain thickness the upper portion thereof will work in compression while the lower portion thereof will work in tension. The boundary between these two zones is an area that does not work in compression or traction. This zone is called the neutral fiber 15. The zone above the neutral fiber 15 is called the supra-fiber-neutral volume 16, whereas the zone below this neutral fiber 15 is called the infra-fiber-neutral volume. 17.

Lorsque l'utilisateur relâche l'effort qu'il exerce sur le ski, l'élasticité de l'ensemble structurel va générer une déformation du ski en contre-flexion. C'est ce qui est représenté à la figure 4. Dans ce cas le volume supra-fibre-neutre 16 travaille en traction tandis que le volume infra-fibre-neutre 17 travaille en compression.When the user releases the effort he exerts on the ski, the elasticity of the overall structure will generate a deformation of the ski against flexion. This is what is represented at figure 4 . In this case, the supra-fiber-neutral volume 16 works in tension while the infra-fiber-neutral volume 17 works in compression.

Comme on peut le voir à la figure 1 le ski selon l'invention comporte des moyens de traction 6 qui exercent une traction entre un premier ancrage 13 et un deuxième ancrage 14. Le premier ancrage 13 est placé au niveau de la spatule 5 au-delà du point de contact spatule 3. Le deuxième ancrage 14 est placé quant à lui en-deçà dudit point de contact spatule 3.As can be seen at figure 1 the ski according to the invention comprises traction means 6 which exert traction between a first anchor 13 and a second anchor 14. The first anchor 13 is placed at the spatula 5 beyond the spatula contact point 3. second anchor 14 is placed in turn below said contact point spatula 3.

Les moyens de traction 6 peuvent se trouver en "position piste", c'est la position représentée à la figure 1 et dans une "position hors piste". En "position hors piste", le deuxième ancrage 14 est reculé d'une distance D par rapport à la position que celui-ci occupe en "position piste". Ladite distance D est comprise entre 0,5 mm et 10 mm. Cependant, en fonction de l'effet désiré et de l'amplitude du relevé de spatule voulue, on peut choisir une distance D comprise entre 1 mm et 7 mm Les moyens de traction 6 comprennent une lame 24 qui relie le premier ancrage 13 au deuxième ancrage 14. En "position hors piste" le recul du deuxième ancrage 14 a pour effet de relever la spatule 5.The traction means 6 can be in "track position", this is the position shown in FIG. figure 1 and in an "off-track position". In "off-track position", the second anchor 14 is moved back by a distance D relative to the position that it occupies in "track position". Said distance D is between 0.5 mm and 10 mm. However, depending on the desired effect and the amplitude of the desired spatula reading, it is possible to choose a distance D between 1 mm and 7 mm. The traction means 6 comprise a blade 24 which connects the first anchor 13 to the second anchor 14. In "off-track position" the recoil of the second anchor 14 has the effect of raising the spatula 5.

Conformément à l'invention les moyens de traction 6 sont placés dans le volume supra-fibre-neutre 16, c'est-à-dire au dessus de la fibre neutre 15. D'autre part les moyens de traction sont essentiellement intégrés dans le ski 1, c'est-à-dire placés sous les moyens de décoration et de protection 8.According to the invention, the traction means 6 are placed in the supra-fiber-neutral volume 16, that is to say above the neutral fiber 15. On the other hand, the traction means are essentially integrated into the ski 1, that is to say placed under the means of decoration and protection 8.

Les figures 5 et 6 décrivent les parties avant du ski décrit à la figure 1 respectivement en "position piste" et en "position hors-piste". Ces deux figures sont des vues en perspective partiellement coupée.The Figures 5 and 6 describe the front parts of the ski described in figure 1 respectively in "track position" and in "off-track position". These two figures are partially cut perspective views.

De manière connue le ski 1 comprend un ensemble structurel 7, des moyens de glisse 9 et des moyens de décor et de protection 8. Une telle construction est largement connue dans l'art antérieur et nous n'entrerons pas ici dans le détail de construction. On pourra rappeler simplement que les moyens de glisse 9 sont les éléments qui assurent l'interface ski-neige et qu'ils sont à la fois des éléments favorisant la glisse ; la semelle 26, ainsi que des éléments importants pour la conduite du ski ; les carres 25.In known manner the ski 1 comprises a structural assembly 7, gliding means 9 and means of decoration and protection 8. Such a construction is widely known in the prior art and we will not go into the details of construction here. . It may be recalled simply that the gliding means 9 are the elements that ensure the ski-snow interface and that they are both elements promoting sliding; the sole 26, as well as important elements for driving the ski; the edges 25.

L'ensemble structurel 7 garantit au ski ses caractéristiques mécaniques, flexibilité, élasticité, etc.....The structural assembly 7 guarantees the ski its mechanical characteristics, flexibility, elasticity, etc .....

L'ensemble structurel 7 comprend un ou plusieurs renforts inférieurs 10, un ou plusieurs renforts supérieurs 11 et une structure intercalaire 12.The structural assembly 7 comprises one or more lower reinforcements 10, one or more upper reinforcements 11 and an intermediate structure 12.

L'ensemble structurel 7 est recouvert par les moyens de protection et de décoration 8. Ces moyens viennent au contact des carres 25 et assurent l'étanchéité de l'assemblage. Afin de donner une meilleure attractivité du ski, ces moyens sont le support de la décoration du ski. On notera que les moyens de protection et de décoration peuvent également comprendre des chants latéraux qui prennent appui sur les carres et/ou sur le renfort supérieur (non représenté).The structural assembly 7 is covered by the protective and decorative means 8. These means come into contact with the edges 25 and seal the assembly. In order to give a better attractiveness of the ski, these means are the support of the decoration of the ski. It should be noted that the protection and decoration means may also comprise side edges which bear on the edges and / or on the upper reinforcement (not shown).

Entre le renfort supérieur 11 et les moyens de décoration et de protection 8 est inséré un remplissage 19. Le remplissage 19 peut par exemple être réalisé en mousse polyuréthane ou tout matériau équivalent. Il peut être réalisé dans le même matériau que la structure intercalaire 12. Le remplissage étant placé au dessus du renfort supérieur, il n'aura presque pas d'effet sur les caractéristiques mécaniques du ski, il ne fait pas partie de l'ensemble structurel 7.Between the upper reinforcement 11 and the decoration and protection means 8 is inserted a filling 19. The filling 19 may for example be made of polyurethane foam or any equivalent material. It can be made of the same material as the intermediate structure 12. The filling being placed above the upper reinforcement, it will have almost no effect on the mechanical characteristics of the ski, it is not part of the overall structure 7.

Le remplissage est parcouru dans le sens longitudinal par un tunnel 29 dans lequel passe la lame 24 des moyens de traction 6. La lame 24 est faite d'un clinquant métallique d'une largeur par exemple comprise entre 5 et 25 mm pour une épaisseur comprise entre 0,4 et 1 mm. Dans l'exemple décrit, la lame fait 12,7 mm de largeur pour 0,5 mm d'épaisseur.The filling is traversed in the longitudinal direction by a tunnel 29 in which the blade 24 passes traction means 6. The blade 24 is made of a metal foil of a width for example between 5 and 25 mm for a thickness included between 0.4 and 1 mm. In the example described, the blade is 12.7 mm wide and 0.5 mm thick.

La lame 24 est susceptible de se déformer en flexion dans une direction perpendiculaire à sa plus grande largeur mais ne se déforme pratiquement pas lorsqu'elle est soumise à une traction dans le sens de sa longueur.The blade 24 is likely to deform in bending in a direction perpendicular to its greater width but does not deform substantially when it is subjected to traction in the direction of its length.

La lame n'est pas nécessairement réalisée par un cliquant métallique, d'autre matériaux peuvent également convenir comme par exemple du carbone.The blade is not necessarily made by a metal click, other materials may also be suitable such as carbon.

La longueur de la lame 24 dépend de la longueur du ski sur lequel les moyens de traction 6 sont implantés. En tout état de cause, la lame 24 s'étend depuis le premier ancrage 13, lequel est placé au niveau de la spatule 5 au-delà du point de contact spatule 3 (PCS), jusqu'au deuxième ancrage 14, lequel se trouve en deçà de ce même point (PCS). De préférence, le deuxième ancrage 14 se trouve au niveau des fixations de sécurité sur la partie centrale du ski 1.The length of the blade 24 depends on the length of the ski on which the traction means 6 are located. In any case, the blade 24 extends from the first anchor 13, which is placed at the spatula 5 beyond the spatula contact point 3 (PCS), to the second anchor 14, which is located below this point (PCS). Preferably, the second anchor 14 is at the level of the safety fasteners on the central part of the ski 1.

Le premier ancrage 13 fixe de façon solidaire la lame 24 au ski, de préférence, à l'ensemble structurel.The first anchor 13 fixedly secures the blade 24 to the ski, preferably to the structural assembly.

Comme on peut le voir à la figure 7, le premier ancrage 13 est constitué par un ensemble vis 22 / insert 23. L'insert fileté 23 est placé sous le renfort supérieur 11. Il comprend une platine, équipée de griffes qui pénètre dans le renfort 11, évitant la rotation de l'insert 23. Il comprend également un fût taraudé, lequel traverse le renfort supérieur 11, la lame 24, le remplissage 19 et éventuellement tout ou partie des moyens de protection et de décoration 8.As can be seen at figure 7 , the first anchorage 13 is constituted by a screw assembly 22 / insert 23. The threaded insert 23 is placed under the upper reinforcement 11. It comprises a plate, equipped with claws which penetrates the reinforcement 11, avoiding rotation of the insert 23. It also comprises a threaded barrel, which passes through the upper reinforcement 11, the blade 24, the filling 19 and possibly all or part of the protection and decoration means 8.

La figure 8 décrit un mode de réalisation alternatif du premier moyen d'ancrage 13.The figure 8 discloses an alternative embodiment of the first anchoring means 13.

La lame 24 comprend à son extrémité une fente 30 par laquelle passe un panneau 31 de tissus en fibre de même nature que le tissu utilisé pour le renfort supérieur 11. Le panneau 31 comme le renfort supérieur 11 est noyé dans une matrice de résine qui après réticulation solidifie l'ensemble. L'ancrage définitif de la lame sur le renfort supérieur est alors réalisé.The blade 24 comprises at its end a slot 30 through which passes a panel 31 of fiber fabrics of the same nature as the fabric used for the upper reinforcement 11. The panel 31 as the upper reinforcement 11 is embedded in a resin matrix which after cross-linking solidifies the whole. The final anchoring of the blade on the upper reinforcement is then performed.

Mise à part le premier ancrage 13 qui solidarise la lame 24 avec l'ensemble structurel 7, la lame 24 n'est pas liée ni au renfort supérieur 11, ni au remplissage 19. D'autre part, pour faciliter le glissement de la lame 24 à l'intérieur du tunnel 29, on pourra prévoir de garnir les parois du tunnel 29 et du renfort supérieur 11 d'une couche ou d'un produit qui réduit la résistance au frottement.Apart from the first anchor 13 which secures the blade 24 with the structural assembly 7, the blade 24 is not bonded either to the upper reinforcement 11 or the filling 19. On the other hand, to facilitate the sliding of the blade 24 inside the tunnel 29, it may be provided to fill the walls of the tunnel 29 and the upper reinforcement 11 with a layer or a product which reduces the resistance to friction.

La figure 6 représente une vue similaire à la figure 5 lorsque le ski selon l'invention se trouve en "position hors-piste", alors que à la figure 5 celui-ci se trouvait en "position piste".The figure 6 represents a view similar to the figure 5 when the ski according to the invention is in "off-piste position", whereas at the figure 5 this one was in "track position".

En "position hors-piste", une traction a été exercée sur la lame 24. Cette traction a été générée par le déplacement, d'une distance D, du deuxième ancrage 14 de la lame 24. La traction sur la lame exercée au niveau du deuxième ancrage 14 de la lame est transmise à l'ensemble structurel 7 du ski 1 au niveau du premier ancrage 13, et génère un déplacement de ce dernier vers le haut et vers l'arrière.In "off-track position", traction was exerted on the blade 24. This traction was generated by the displacement, by a distance D, of the second anchor 14 of the blade 24. The traction on the blade exerted at the the second anchoring 14 of the blade is transmitted to the structural assembly 7 of the ski 1 at the first anchor 13, and generates a displacement of the latter upwards and backwards.

On obtient alors une accentuation du relevé de la spatule 5 et simultanément un recul du point de contact de la spatule.This results in an accentuation of the reading of the spatula 5 and simultaneously a decline in the point of contact of the spatula.

En ce qui concerne l'accentuation du relevé de spatule, on peut en évaluer l'amplitude de cette accentuation en mesurant la distance séparant la semelle du ski d'une surface horizontale sur laquelle celui-ci repose.With regard to the accentuation of the spatula survey, the amplitude of this accentuation can be evaluated by measuring the distance separating the ski sole from a horizontal surface on which it rests.

Au niveau du point de contact spatule 3 (PCS), cette distance est par définition nulle lorsque le ski est en "position piste". Lorsqu'on place le ski en "position hors-piste", ce même point 3 est déplacé vers le haut d'une valeur comprise entre 2 et 15 mm, en particulier égale à 5 mm.At the point of contact spatula 3 (PCS), this distance is by definition zero when the ski is in "track position". When placing the ski in "off-track position", this same point 3 is moved upwards by a value of between 2 and 15 mm, in particular equal to 5 mm.

En ce qui concerne le recul du point de contact spatule, on peut en évaluer l'amplitude en mesurant la longueur L séparant le point contact spatule 3 (lorsque le ski est en position piste) du point de contact reculé 47. Le point de contact reculé 47, correspond à la zone de la semelle de la partie avant du ski qui est au contact d'une surface plane sur laquelle le ski est posé lorsque ce dernier est en "position hors piste". La longueur L est comprise entre 20 mm et 500 mm. On obtient de bons résultats, c'est-à-dire un bon comportement du ski en "position hors-piste" lorsque la longueur L est comprise entre 50 mm et 300 mm.Regarding the recoil of the spatula contact point, its amplitude can be evaluated by measuring the length L separating the spatula contact point 3 (when the ski is in the track position) from the remote point of contact 47. The point of contact back 47, corresponds to the area of the sole of the front portion of the ski which is in contact with a flat surface on which the ski is placed when the latter is in "off-track position". The length L is between 20 mm and 500 mm. Good results are obtained, that is to say a good behavior of the ski in "off-track position" when the length L is between 50 mm and 300 mm.

La figure 9 représente une vue de dessus de l'organe de traction 32 qui exerce la traction sur la lame 24 des moyens de traction 6.The figure 9 represents a view from above of the traction member 32 which exerts traction on the blade 24 of the traction means 6.

L'organe de traction 32 est fixé sur le ski devant la fixation de sécurité. Il est constitué par une chape 38 fixée par deux vis sur le ski. Cette chape est réalisée par pliage d'une tôle métallique. La chape 38 comprend deux supports d'axe faisant saillie perpendiculairement depuis la base de celle-ci, laquelle est plaquée contre la surface supérieure du ski. Un levier 37 comportant deux branches et une palette est monté pivotant sur la chape 38, chacune des branches étant montée pivotante par rapport à l'un des supports d'axe. Les deux branches sont reliées l'une à l'autre par l'intermédiaire de la palette qui sert de moyens de préhension et d'actionnement de l'organe de traction.The traction member 32 is fixed on the ski in front of the safety fastener. It is constituted by a yoke 38 fixed by two screws on the ski. This screed is made by folding a metal sheet. The yoke 38 comprises two axis supports projecting perpendicularly from the base thereof, which is pressed against the upper surface of the ski. A lever 37 comprising two branches and a pallet is pivotally mounted on the yoke 38, each of the branches being pivotally mounted relative to one of the axis supports. The two branches are connected to one another by means of the pallet which serves as means for gripping and actuating the traction member.

Un tirant 36 est placé entre les deux branches du levier. Il est relié par l'une de ses extrémités au levier 37 par l'intermédiaire d'un axe pivotant 41. Le tirant 36 est relié par l'autre de ses extrémités et à une boucle 35. La liaison entre le tirant 36 et la boucle 35 est coulissante et se fait par l'intermédiaire d'une plaque 42, laquelle est solidaire du tirant et qui est susceptible de coulisser dans la boucle 35. L'amplitude de coulissement de la plaque 42 est très réduite et est contrainte par un ressort 44 à fort module d'élasticité.A tie 36 is placed between the two branches of the lever. It is connected by one of its ends to the lever 37 via a pivoting axis 41. The tie rod 36 is connected by the other of its ends and to a loop 35. The connection between the tie rod 36 and the Loop 35 is sliding and is via a plate 42, which is integral with the tie rod and which is slidable in the loop 35. The sliding amplitude of the plate 42 is very small and is constrained by a spring 44 with high modulus of elasticity.

Une lumière 33 ménagée dans les moyens de protection et de décoration 8 permet à la lame 24 de sortir du tunnel 29 et d'avoir son extrémité accessible. Une crémaillère 34 est fixée sur cette extrémité par l'intermédiaire d'une vis. La crémaillère 34 comprend au minimum une dent, mais peut en comprendre 2, 3 ou plus.A light 33 formed in the protective and decorative means 8 allows the blade 24 to exit the tunnel 29 and have its end accessible. A rack 34 is fixed on this end by means of a screw. The rack 34 comprises at least one tooth, but may include 2, 3 or more.

La boucle 35 par l'intermédiaire de la tige 43 est maintenant contre les dents de la crémaillère 34.The loop 35 via the rod 43 is now against the teeth of the rack 34.

La figure 10 montre une vue de côté de l'organe de traction avant sa manipulation. La tige 43 est mise dans le creux d'une des dents de la crémaillère 34. L'utilisateur exerce une pression sur le levier 37, laquelle est converti en un effort de traction sur la lame 24. Cet effort de traction génère un déplacement de la lame d'une distance égale à D. Grâce au mécanisme de genouillère constitué par le non-alignement des trois axes: tige 43, support d'axe de la chape 38 et axe pivotant 41; la mise en tension de la lame est maintenue tant que le levier reste en position basse. La position basse du levier 37 est la position qui est représentée à la figure 11.The figure 10 shows a side view of the traction member before handling. The rod 43 is placed in the hollow of one of the teeth of the rack 34. The user exerts a pressure on the lever 37, which is converted into a traction force on the blade 24. This traction force generates a displacement of the blade having a distance equal to D. Thanks to the toggle mechanism constituted by the non-alignment of the three axes: rod 43, clevis pin support 38 and pivoting shaft 41; the tensioning of the blade is maintained as long as the lever remains in the low position. The low position of the lever 37 is the position which is represented at the figure 11 .

Le levier permet une démultiplication de la force que l'utilisateur devra mettre pour l'actionnement des moyens de traction. La force nécessaire pour mettre les moyens de traction en "position hors-piste" est comprise entre 70 daN et 160 daN.The lever allows a multiplication of the force that the user will have to put for the actuation of the traction means. The force required to put the traction means in "off-track position" is between 70 daN and 160 daN.

Avantageusement, l'organe de traction, comporte des moyens élastiques qui travaillent dans le sens longitudinal du ski et qui ont un fort module d'élasticité. Ces moyens élastiques se présentent, dans le mode de réalisation décrit, sous la forme du ressort 44. La constante de raideur du ressort est supérieure à 5000 N/m, de préférence supérieure à 10000 N/m. Les moyens élastiques servent plusieurs fonctions. Notamment, ils permettent d'absorber les chocs lorsque le ski part en contre-flèche. D'autre part, compte tenu du fait que le déplacement du deuxième point d'ancrage est relativement faible, la légère laxité par les moyens élastiques est nécessaire pour faire fonctionner correctement l'organe de traction.Advantageously, the traction member comprises elastic means which work in the longitudinal direction of the ski and which have a strong modulus of elasticity. These elastic means are, in the embodiment described, in the form of the spring 44. The stiffness constant of the spring is greater than 5000 N / m, preferably greater than 10000 N / m. The elastic means serve several functions. In particular, they absorb shock when the ski goes against the arrow. On the other hand, given the fact that the displacement of the second anchor point is relatively small, the slight laxity by the elastic means is necessary to properly operate the traction member.

Avantageusement, la crémaillère 34 possède plusieurs dents espacées les unes des autres. Il est possible de prévoir une dent qui soit positionnée de telle façon que lorsque la tige 43 y est en prise, aucune tension n'est exercée sur la lame 24. Ainsi même lorsque les moyens de traction sont en "position piste", le levier 37 est également dans une position rabattue contre la surface supérieur du ski 1.Advantageously, the rack 34 has several teeth spaced apart from each other. It is possible to provide a tooth which is positioned in such a way that when the rod 43 is engaged therein, no tension is exerted on the blade 24. Thus, even when the traction means are in "track position", the lever 37 is also in a folded position against the upper surface of the ski 1.

L'organe de traction représenté aux figures 9, 10 et 11 ne constitue qu'un exemple d'un organe de traction pouvant être utilisé dans le cadre de l'invention. Un tel organe de traction doit pouvoir être placé dans deux positions stables, une position libre et une position en tension. La position libre correspond à la "position piste" des moyens de traction. Dans cette position, l'organe de traction n'exerce aucun effort sur la lame 24. Cette dernière est alors solidairement fixée sur l'ensemble structurel 7 du ski 1 au niveau du premier ancrage 13 mais libre de coulisser par rapport à celui-ci en tout autre point de sa longueur, et notamment au niveau du deuxième ancrage 14. La lame ne joue pas ou peu de rôle dans le comportement du ski, dans ses caractéristiques mécaniques.The traction element represented in figures 9 , 10 and 11 is only one example of a traction member that can be used in the context of the invention. Such a traction member must be able to be placed in two stable positions, a free position and a position in tension. The free position corresponds to the "track position" of the traction means. In this position, the traction member does not exert any force on the blade 24. The latter is then integrally attached to the structural assembly 7 of the ski 1 at the first anchor 13 but free to slide relative thereto at any other point of its length, and particularly at the second anchor 14. The blade plays little or no role in the behavior of the ski, in its mechanical characteristics.

Lorsque l'organe de traction est en tension, cela correspond à la "position hors-piste" des moyens de traction. Dans cette position, la lame 24 est en tension. Cependant, du fait du positionnement des moyens de traction 6 dans la zone supra-fibre neutre 16, chaque flexion du ski, c'est-à-dire remonté des zones d'extrémité (spatule, talon) par rapport à la partie centrale (cf. figure 3), a pour effet un relâchement de la lame 24, voire un flambage de celle-ci. Par conséquent, la rigidité du ski en flexion n'est pas modifiée par la présence des moyens de traction, que ces derniers soient en "position piste" ou en "position hors-piste".When the traction member is in tension, this corresponds to the "off-track position" of the traction means. In this position, the blade 24 is in tension. However, because of the positioning of the traction means 6 in the supra-neutral fiber zone 16, each bending of the ski, that is to say, raised end zones (spatula, heel) with respect to the central portion ( cf. figure 3 ), has the effect of a relaxation of the blade 24, or a buckling thereof. Consequently, the rigidity of the ski in bending is not modified by the presence of the traction means, whether the latter are in "track position" or "off-track position".

En revanche, les moyens de traction ont un effet lorsque le ski travaille en contre-flexion, c'est-à-dire lorsque les extrémités du ski (spatule, talon) descendent par rapport à la partie centrale. En effet la lame se comporte alors comme un renfort supplémentaire travaillant en traction. Cet effort sera d'autant plus important en "position hors-piste" qu'en "position piste". D'ailleurs, dans le cas où en "position piste" on ne bloque pas en position le deuxième ancrage 14 et la lame 24, et que celui-ci garde la faculté de coulisser, l'effet des moyens de traction sur la flexibilité du ski sont également insignifiants en contre-flexion.On the other hand, the traction means have an effect when the ski is working in counter-flexion, that is to say when the ends of the ski (spatula, heel) go down with respect to the central part. Indeed the blade then behaves like an additional reinforcement working in tension. This effort will be even more important in "off-track position" than in "track position". Moreover, in the case where in "track position" is not locked in position the second anchor 14 and the blade 24, and that it retains the ability to slide, the effect of the traction means on the flexibility of ski are also insignificant in counter-flexion.

On pourra prévoir un organe de traction 32 dont le maintien en "position hors piste" est conditionné par l'utilisation du ski, par exemple conditionné par la présence d'une chaussure alpine dans les fixations de sécurité 2. De cette façon, le stockage des skis, ne pourra pas se faire alors que les moyens de traction sont en tension. En effet, La mise sous une tension importante des skis pendant une trop longue période risquerait de modifier les caractéristiques mécanique de ceux-ci, voire de les endommager irrémédiablement.It is possible to provide a traction member 32 whose holding in "off-piste position" is conditioned by the use of the ski, for example conditioned by the presence of an alpine shoe in the safety fasteners 2. In this way, the storage skis, will not be able to while the traction means are in tension. Indeed, the putting under a significant tension of the skis for a too long period would risk to modify the mechanical characteristics of these, even to damage them irremediably.

Les figures 12 et 13 représentent un deuxième mode de réalisation de l'invention. Ce mode de réalisation ne diffère du premier mode de réalisation que par la présence d'une portion souple dans les moyens de protection et de décoration. La description en détail de l'ensemble des éléments ne sera pas reprise ici du fait des similarités qui existent avec le premier mode de réalisation.The Figures 12 and 13 represent a second embodiment of the invention. This embodiment differs from the first embodiment only in the presence of a flexible portion in the protection and decoration means. The description in detail of all the elements will not be repeated here because of the similarities that exist with the first embodiment.

Le ski 1 comprend un ensemble structurel 7, des moyens de glisse 9 et des moyens de protection et de décoration 8. Les moyens de traction 6 sont disposés entre un premier ancrage 13, lequel est placé au-delà du point de contact spatule 3 (PCS), et un deuxième ancrage 14 placé en-deçà de ce même point.The ski 1 comprises a structural assembly 7, gliding means 9 and protection and decoration means 8. The traction means 6 are arranged between a first anchor 13, which is placed beyond the spatula contact point 3 ( PCS), and a second anchor 14 placed below this same point.

Les moyens de traction 6 sont disposés dans le volume supra-fibre neutre 16, c'est-à-dire au-dessus de la fibre neutre 15. La plus grande partie de la longueur des moyens de traction 6, qui est constituée par une lame 24, est située au-dessus de l'ensemble structurel 7 du ski 1, en d'autre terme au-dessus du "moteur" du ski.The traction means 6 are arranged in the neutral supra-fiber volume 16, that is to say above the neutral fiber 15. The greater part of the length of the traction means 6, which is constituted by a blade 24, is located above the structural assembly 7 of the ski 1, in other words above the "motor" of the ski.

Les moyens de protection et de décoration sont percés d'une fenêtre 45. La fenêtre 45 est placée dans la zone la plus incurvée de la partie avant du ski. Il s'agit de la zone de naissance de la spatule. La fenêtre a une longueur comprise entre 10 et 30 cm pour une largeur comprise entre la largeur de la lame 24 et la largeur du ski 1.The protection and decoration means are pierced by a window 45. The window 45 is placed in the most curved zone of the front part of the ski. This is the birth zone of the spatula. The window has a length of between 10 and 30 cm for a width between the width of the blade 24 and the width of the ski 1.

La fenêtre 40 est recouverte par un écran 46 de façon à garantir l'étanchéité et à masquer la lame. L'écran 41 est fait d'un matériau extensible et élastique.The window 40 is covered by a screen 46 so as to guarantee sealing and to mask the blade. The screen 41 is made of an extensible and elastic material.

A la figure 12, le ski est représenté en "position piste". La lame 24, qui n'est pas en tension, se trouve dans le tunnel 29. L'écran 46 se place en continuité des moyens de protection et de décoration 8.To the figure 12 , the ski is represented in "track position". The blade 24, which is not in tension, is in the tunnel 29. The screen 46 is placed in continuity with the protection and decoration means 8.

A la figure 13, le ski est représenté en "position hors-piste". La lame 24 est mise en traction par l'organe de traction. Du fait de la présence de la fenêtre 45, la lame 24 quitte le contact de l'ensemble structurel 7 dans la zone de la fenêtre 45. La lame 24 fait saillie des moyens de protection et de décoration au travers de la fenêtre 45. Elle reste cependant sous l'écran 46, lequel s'étire pour en accompagner le mouvement.To the figure 13 , the ski is represented in "off-piste position". The blade 24 is put in traction by the traction member. Due to the presence of the window 45, the blade 24 leaves the contact of the structural assembly 7 in the area of the window 45. The blade 24 protrudes from the protection and decoration means through the window 45. remains under the screen 46, which stretches to accompany the movement.

Dans ce mode de réalisation, la traction sur la lame 24 est plus efficace pour relever la spatule car la lame peut, lorsqu'elle est sous tension, se placer selon un profil plus direct entre le premier et le deuxième ancrage. Pour reprendre un terme de géométrie, on dira que la lame 24 se place sur la corde dans la fenêtre 45.In this embodiment, the traction on the blade 24 is more effective for raising the spatula because the blade can, when it is under tension, be placed in a more direct profile between the first and the second anchorage. To use a geometry term, we say that the blade 24 is placed on the rope in the window 45.

Dans les quelques modes de réalisation décrits ci-dessus, la lame 24 est posée sur le renfort supérieur sur toute la longueur de celui-ci. Pourtant d'autres modes de réalisation de l'invention font passer la lame en dessous du renfort supérieur sur une petite partie de sa longueur, étant bien entendu que la majeure partie de la longueur de la lame reste au dessus de la fibre neutre et de préférence au dessus du renfort supérieur. De tels modes de réalisation permettent d'avoir des zones de déformation non-linéaires. Dans les zones où la lame est au dessus du renfort, la déformation du ski, en position hors piste, est important tandis que dans les zones où la lame est en dessous du renfort, la déformation est plus faible, voire imperceptible. Un autre moyen nous permet d'avoir des déformations non-linéaires. C'est de maintenir la lame au dessus du renfort supérieur sur toute sa longueur, et de placer par-dessus, en certains endroits, un renfort ponctuel. Le ou les renforts ponctuels pouvant avoir une longueur comprise 2 cm et 20 cm.In the few embodiments described above, the blade 24 is placed on the upper reinforcement over the entire length thereof. Yet other embodiments of the invention pass the blade below the upper reinforcement over a small part of its length, it being understood that most of the length of the blade remains above the neutral fiber and preferably above the upper reinforcement. Such embodiments allow to have non-linear deformation zones. In areas where the blade is above the reinforcement, the deformation of the ski, in off-track position, is important while in areas where the blade is below the reinforcement, the deformation is lower, or even imperceptible. Another way allows us to have nonlinear deformations. This is to maintain the blade above the upper reinforcement over its entire length, and to place over, in some places, a punctual reinforcement. The one or more point reinforcements may have a length of 2 cm and 20 cm.

L'invention ne se limite pas aux quelques modes de réalisation décrits ici à titre d'exemple, mais couvre toute réalisation qui entre dans la portée des revendications.The invention is not limited to the few embodiments described here by way of example, but covers any embodiment within the scope of the claims.

Claims (8)

  1. Ski (1) comprising a structural unit (7), a gliding structure (9) and a decorative and protective structure (8); said structural unit (7) including at least one lower reinforcement (10), at least one upper reinforcement (11), and an intercalary structure (12) positioned between the upper reinforcement (11) and the lower reinforcement (10); said ski having a longitudinally extending cambered profile such that, with said gliding structure (9) positioned on a planar surface, the ski rests on a shovel contact point (3) and a tail contact point (4); said ski further comprising a tension structure (6) to exert a tension force between a first anchoring (13) positioned forward of the shovel contact point and a second anchoring (14) positioned rearward of said shovel contact point, characterized in that said tension structure (6) is positioned, along a majority of a length of the tension structure, beneath said decorative and protective structure (8), and in that said tension structure (6) is positioned, along a majority of the length of the tension structure, above the neutral axis (15) of said ski.
  2. Ski according to claim 1, characterized in that said tension structure (6) further comprises a tension member for positioning said second anchoring (14) in at least two positions separated longitudinally from one another by a distance D.
  3. Ski according to one of claims I or 2, characterized in that said tension structure (6) is positioned, along a majority of a length of the tension structure, above said upper reinforcement (11).
  4. Ski according to one of claims 1 to 3, characterized in that said distance D is between 0.5 mm and 10.0 mm, preferably between 1.0 mm and 7.0 mm.
  5. Ski according to one of claims 1 to 4, characterized in that said tension structure (6) includes a blade (24).
  6. Ski according to one of claims I to 5, characterized in that said decorative and protective structure (8) includes a window (45) through which said blade (24) can project.
  7. Ski according to one of claims 1 to 6, characterized in that a filler (19) is positioned between said decorative and protective structure (8) and said upper reinforcement (11), and in that a tunnel (29) is arranged in said filler (19) in order to receive said blade (24).
  8. Ski according to one of claims 1 to 7, characterized in that said tension structure (6) includes an elastic mechanism.
EP09000417A 2008-01-25 2009-01-14 Alpine ski with adjustment means Active EP2082788B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0800401A FR2926735B1 (en) 2008-01-25 2008-01-25 ALPINE SKI WITH MEANS OF ADJUSTMENT

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EP2082788A1 EP2082788A1 (en) 2009-07-29
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AT (1) ATE494048T1 (en)
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Also Published As

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FR2926735A1 (en) 2009-07-31
DE602009000505D1 (en) 2011-02-17
ATE494048T1 (en) 2011-01-15
US20090189370A1 (en) 2009-07-30
EP2082788A1 (en) 2009-07-29
FR2926735B1 (en) 2010-03-26
US8172250B2 (en) 2012-05-08

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