EP2343107A1 - Alpine ski - Google Patents
Alpine ski Download PDFInfo
- Publication number
- EP2343107A1 EP2343107A1 EP10306451A EP10306451A EP2343107A1 EP 2343107 A1 EP2343107 A1 EP 2343107A1 EP 10306451 A EP10306451 A EP 10306451A EP 10306451 A EP10306451 A EP 10306451A EP 2343107 A1 EP2343107 A1 EP 2343107A1
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- European Patent Office
- Prior art keywords
- ski
- contact
- point
- pce
- horizontal plane
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C5/00—Skis or snowboards
- A63C5/04—Structure of the surface thereof
- A63C5/0405—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker
Definitions
- the invention relates to the field of snow sports, especially Alpine skiing. More specifically, it aims at a specific geometry of a ski that makes it possible to improve its behavior in terms of maneuverability and cornering behavior.
- the alpine skis have a bearing surface which is defined in a standardized way as being the sole surface in contact with a horizontal plane when the ski is loaded in its skate, this bearing surface being limited forward and backward. by boundary lines called “lines of contact” front and rear.
- the objective of the invention is therefore to provide a ski that allows to combine both good ski handling properties flat, with an optimal turn behavior through a sufficient contact length when the ski is inclined.
- the invention therefore relates to a ski on which it is possible to define different points along its length.
- the ski when the ski is flat on a horizontal plane, and is loaded at its center so that the edges touch the horizontal plane at the pad, the ski has a contact surface, and a contact length at the edges, which extend between the front and rear contact lines.
- the ski when the ski is pivoted about its longitudinal axis, and is therefore inclined at a non-zero angle relative to the same horizontal plane, while being loaded in its pad so that one edges touch the horizontal plane at the level of the pad, the ski then has a contact length which extends from the extreme contact points hereinafter referred to as "forward contact points" and "extreme rear contact points".
- the ratio of the distance separating the front contact line and the forward contact point, relative to the distance separating the midpoint of the shoe to the line. forward contact is greater than 12%.
- the same ratio is greater than 15%, preferably between 18% and 21%.
- the ski according to the invention has a geometry such that the contact length in cornering situation, that is to say when the ski is inclined, is significantly greater than the contact length when the ski is flat.
- the contact length in inclined ski which is particularly useful for driving the turn, is relatively large, compared to the length of contact when the ski is flat, that is to say in a situation where it is advantageous that it is lower to facilitate the handling of the ski.
- the measure of elongation of the contact length made by comparing the flat ski with the ski in an inclination of 35 ° is greater than 70 millimeters, and even more than 90 millimeters for an inclination of 45 °.
- an "advanced contact line” which corresponds to the front limit of the contact zone of the ski on a horizontal plane when the ski is on the one hand , applied on this horizontal plane at the level of its pad, and that in addition it receives a vertical force corresponding to a mass of 2 kg at its front end.
- the ski is loaded at its skate so that its camber is canceled and complementarily, the ski is also loaded at its front end, but with a force corresponding to a mass of 2 kg, so the contact surface extends to the characteristic advanced contact line. Beyond this line of advanced contact, is the part of the spatula useful for the ski does not put in the snow.
- This spatula zone has a radius of curvature of the order of 150 to 200 millimeters.
- the sole is separated from the horizontal plane by a height between 1 and 2 mm.
- the advanced contact line it is possible to measure the height which separates the sole of the horizontal plane when the ski is laid flat, under the measurement conditions of ISO 6289, it being understood that the determination of the contact lines and the extreme contact points is done with a gauge of 0.1 mm and not 0.5 as recommended by said standard.
- the front end contact point as defined above, and for a slope of the ski of 45 ° is distant from the contact line advanced also defined above by a distance of less than 4 cm, or even 3 cm, and preferably 2 cm, in front of or behind said line.
- the midpoint between the front and rear extreme contact points moves towards the front of the ski when the angle of inclination of the latter increases.
- the middle of the contact length always determined by loading the ski to its skate so as to bring the edge on the horizontal plane, has a specific evolution. Indeed, this midpoint of the contact length is even more advanced than the angle of inclination of the ski is important. In other words, the more the ski is inclined, the more the middle point of the contact length moves forward. This point is usually located beyond the middle point of the shoe, ie the "mounting point" according to the definition of ISO 6289. In these conditions, the skier is left with a point of application its weight more and more behind the middle of the contact length, when the ski inclination angle increases, which improves the driving of the ski, and allows to obtain a more and more successful ski.
- a ski 1 rests on a horizontal plane 2 by two contact zones 3,4 between which the sole of the board 5 is separated from the horizontal plane 2 by a camber 6.
- the ski has a mark 9 embodying the middle of the shoe of the user, or according to the name of the ISO 6289 standard the "mounting point", and relative to which will be mounted the elements of the safety binding .
- the contact area between the sole 5 and the plane 2 extends between the front contact line 10 and the rear contact line 11.
- the forward contact line 10 is located at a distance of about 30 to 40% of the length of the ski, from the mounting point 9, and preferably between 35 and 37%. Forward of the line of contact before 10, is therefore defined the spatula 12 which can itself be broken down into two adjacent regions, the limit is however not defined in a standardized manner.
- a first part 13 constitutes the beginning of the spatula and has a large radius of curvature.
- This first portion 13 is extended by a second portion 14 constituting the spatula survey which has a smaller radius of curvature and ends with the front end 15 of the board.
- the ski has a particular "spatula profile", that is to say an evolution of height of the lower surface of the spatula with respect to the horizontal plane 2.
- the pad region 16 is defined in a standardized manner.
- the heel 17 which ends with the rear end 18 of the board.
- the heel 17 also presents a structure similar to that of the spatula, with two zones having distinctly different radii of curvature, without however being obligatory.
- the heel 17 has a particular "heel profile", that is to say a change in height of the lower surface of the heel relative to the horizontal plane 2.
- the ski has a dimension line that widens beyond the front 10 and rear 11 contact lines.
- the contact surface which is bordered by the contact length has a length LP 0 measured longitudinally, and corresponding to the distance between the front contact line 10 and the rear contact line 11.
- the length of contact changes in a particular way when the ski is inclined laterally.
- the ski when the ski is inclined by pivoting about an axis parallel to its longitudinal axis, it rests on the horizontal plane at two contact zones each located in the spatula and the heel.
- the edge In the most frequent case where the ski has a side line dug, the edge is not in contact with the horizontal plane in the middle of the skate, as long as the ski is not loaded.
- the ski when the ski receives a force perpendicular to its upper face, applied substantially at the midpoint of the shoe 9, the ski is bent until the edge comes to touch the horizontal plane 2 at the midpoint of the shoe 9
- the extreme contact points 23, 24 are determined, which include the front and rear limits of the contact zone between the edge 20 and the horizontal plane 2. It should be noted that according to the geometry of the ski, it is possible that the edge does not touch the horizontal plane throughout its length between the extreme contact points 23,24, without modifying the definition of these points.
- the distance LP ⁇ between the two transverse lines 25,26 passing through the extreme contact points before 24 and rear 23 corresponds to the length of contact when the ski is inclined at an angle ⁇ . It should be noted that the identification of these two lines 25,26 is done when the ski is inclined on the edge, loaded by a force of at least 40 Newtons applied to the mounting point 9, in a direction perpendicular to the ski, and using a 0.1 mm gauge. Then, the distance LP ⁇ between these two lines 25,26 is measured when the ski is flat and loaded at its center. It should be noted that according to the invention, the dimension line widens at least to the extreme contact points 23, 24.
- FIGS. Figures 5 and 6 the procedure for measuring the different characteristic contact lengths is illustrated in FIGS. Figures 5 and 6 .
- This mode of operation makes it possible to request the skis in a manner similar to the behavior of the ski during a turn. It also allows you to combine dimension line parameters and spatula and heel profiles to study the evolution of contact lines.
- a system 50 comprises a very rigid non-deformable horizontal table 51 , surmounted by a gantry 52 supporting a jack 53 whose position of the hanging point 54 can be adjusted according to the measurement to be made.
- the inclination of the jack 53 and in particular of its rod can thus be modified according to the inclination ⁇ desired, this angle ⁇ corresponds to the angle of edge grip.
- a plate 56 which can bear against the upper face of the board 1. It is also possible that this plate engages in the elements constituting the safety fastener.
- This plate 56 thus makes it possible to distribute a portion of the forces exerted by the jack on an area of the pad surrounding the mid-point of the boot, while also ensuring that the force is exerted perpendicular to the surface of the ski. So, in the configuration shown right in the figure 5 , the ski 61 rests flat, and receives a vertical force at the pad, allowing to define in the configurations of the ISO 6289 standard, and with a gauge of 0.1mm, the position of the front and rear contact lines 10 and 11.
- the point of attachment 54 of the cylinder is positioned so that its rod forms an angle ⁇ with a perpendicular to the plane of the table.
- the plate located at the end of the rod of the jack is integral with the board so that the adjustment of the angle of the jack fixes the inclination of the board relative to the plane with the same angle ⁇ .
- a force is then exerted by the cylinder rod so that, as illustrated in FIG. figure 6 the edge 20 of the ski comes into contact with the plane of the table 51.
- the extreme contact points 23, 24 are then determined for a given inclination.
- the ratio of the distance D ⁇ separating the extreme contact point before 24 from the front contact line 10, relative to the distance D separating the contact line before 10 the same shoe center point 9, is greater than 12% for an inclination ⁇ of 35 °, and greater than 15%, and advantageously between 18 and 21%, for an inclination ⁇ of 45 °.
- the choice of a dimension line that widens beyond the front contact line, and a particular spatula profile increases the length of contact between flat ski and ski tilted on the edge.
- a point of interest with respect to the positioning of the extreme contact points, in particular in the spatula zone.
- a point is determined as illustrated in figure 7 when the ski is loaded at its center, so that its camber is canceled, and that it receives complementarily a calibrated force F at its front end 1.
- this effort is chosen to a value equivalent to 2 kg, so that the contact surface between the sole and the horizontal plane 2 extends relative to the bearing length when the ski is loaded only in his skate.
- This limit called “advanced contact line”, forms the 30 mark on the ski.
- the ski hill line extends from the skid to this advanced contact line, and may extend beyond this, or begin to narrow toward the end of the ski.
- the height h separating the sole of the horizontal plane 2, when the ski is flat, loaded with the shoe, at the level of the advanced contact line 30, is between 1 and 2 mm.
- the extreme contact point before 24 is close to the advanced contact line 30, and is less than 40 mm, or even 30 mm, preferably about 20 mm, forward or backward.
- the ski parameters are chosen in such a way that the spatula contact length increases in the angle ⁇ of edge grip, progressively to a limit value close to the advanced contact line 30.
- the rear extreme contact point position 23 can move very little away from the position of the rear contact line 11, or to move backwards when the edge-gripping angle ⁇ increases. It is advantageous that the displacement of the rear end point 23 increases less rapidly than the displacement of the front end point 24.
- the height separating the sole of the horizontal plane is less than 1mm, when the ski is flat and loaded on the skate
- the middle of the contact length for different inclinations ⁇ evolves in a manner that is favorable to driving turns.
- the PCE AR45, PCE AV45, PCE AR35, PCE AV35, PCE AR25, PCE AV25, PCE AR15, PCE AV15 markings of the extreme contact points were measured at the front and rear for different inclinations of 45, 35 , 25 and 15 °, it being understood that for a tilt ⁇ of 0 °, the end points corresponding to the contact lines 10 and back 11. the rear positioning of the middle extreme contact points for these different inclinations correspond to the points M 0, M, 5 , M 25 , M 35 , M 45 .
- these points are positioned so that they are closer to the front of the ski when the angle of inclination ⁇ progresses. This means that the extreme front contact point moves further away from the middle of the shoe 9 than the rear end contact point. In certain configurations, and in particular for large angles ⁇ , this midpoint of the contact length is found in front of the midpoint of shoe 9. Such a configuration has given good results in terms of behavior and corresponds in particular to a high performance ski when it is sufficiently inclined on the edge.
- the ski according to the invention has many advantages, in particular that of combining both good handling when the ski is flat with good cornering behavior when the ski is inclined, thanks to a relatively longer contact length.
- This increase in contact length is large enough that the difference between the flat ski and the ski on the edge at 45 ° is significant. Therefore, according to the invention, the skier has a ski of given length, which he optimally uses from a corner angle of 45 °, but which is equivalent to a ski of longer length. short flat, about 15%.
- a ski 166 cm long corresponds flat to a ski size about 141 cm
- a ski of 176 cm corresponds flat to a ski size 153 cm.
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- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Description
L'invention se rattache au domaine des sports de glisse sur neige, et plus particulièrement du ski alpin. Elle vise plus spécifiquement une géométrie spécifique d'un ski qui permet d'en améliorer le comportement en termes de maniabilité et de conduite de virage.The invention relates to the field of snow sports, especially Alpine skiing. More specifically, it aims at a specific geometry of a ski that makes it possible to improve its behavior in terms of maneuverability and cornering behavior.
De façon générale, les skis alpins ont une surface portante qui est définie de façon normalisée comme étant la surface de la semelle au contact d'un plan horizontal lorsque le ski est chargé en son patin, cette surface portante étant limitée en avant et en arrière par des lignes limites appelées « lignes de contact » avant et arrière.In general, the alpine skis have a bearing surface which is defined in a standardized way as being the sole surface in contact with a horizontal plane when the ski is loaded in its skate, this bearing surface being limited forward and backward. by boundary lines called "lines of contact" front and rear.
On a constaté que la maniabilité d'un ski pouvait être améliorée en diminuant cette surface portante, de manière à faciliter les mouvements de pivotement de la planche autour d'un axe vertical. Cette tendance consiste donc à rapprocher les lignes de contact avant et/ou arrière de la zone du patin.It has been found that the handling of a ski can be improved by reducing this bearing surface, so as to facilitate the pivoting movements of the board about a vertical axis. This tendency therefore consists in bringing the front and / or rear contact lines closer to the zone of the pad.
Ceci a pour conséquence d'augmenter la longueur de la spatule et du talon, qui sont les zones définies de façon normalisée comme étant au-delà des lignes de contact respectivement avant et arrière. Ainsi, on peut globalement définir sur ce type de ski deux régions principales de la spatule, à savoir une première zone ou amorce de spatule, directement en avant de la ligne de contact avant, qui possède un grand rayon de courbure, et qui se poursuit par une seconde partie formant le relevé de spatule, à plus faible rayon de courbure, et qui se termine par l'extrémité avant du ski.This has the consequence of increasing the length of the spatula and heel, which are the areas defined in a standardized manner as being beyond the contact lines respectively front and rear. Thus, it is generally possible to define on this type of ski two main regions of the spatula, namely a first zone or spatula primer, directly in front of the front contact line, which has a large radius of curvature, and which continues by a second part forming the tip of spatula, with a smaller radius of curvature, and which ends with the front end of the ski.
Le problème qui se pose avec ce type de géométrie de planche réside dans la réduction de la longueur de contact, c'est-à-dire la longueur de la carre qui est au contact de la neige, lorsque le ski est basculé sur la carre. En effet, lorsque le skieur effectue un virage, et qu'il incline le ski latéralement, en le faisant pivoter autour de son axe longitudinal, seule la carre du côté interne du virage reste au contact de la neige. Du fait de la géométrie de la planche, on peut alors identifier des points de contact extrêmes, situés au-delà des lignes de contact avant et arrière, définissant les limites de la longueur de contact en fonction de l'inclinaison de la planche.The problem that arises with this type of plank geometry lies in reducing the length of contact, that is to say the length of the edge that is in contact with the snow, when the ski is tilted on the edge . Indeed, when the skier makes a turn, and he tilts the ski laterally, by rotating it around its longitudinal axis, only the edge of the inner side of the turn remains in contact with the snow. Because of the geometry of the board, it is then possible to identify extreme contact points, located beyond the front and rear contact lines, defining the limits of the contact length as a function of the inclination of the board.
Or, le gain en maniabilité, ski à plat, consécutif au recul de la ligne de contact avant, se traduit par une diminution de la longueur de contact, même lorsque le ski est incliné. Habituellement, la recherche d'une longueur de contact suffisamment importante passe naturellement par une augmentation de la surface portante, et donc une diminution de la maniabilité.However, the gain in handling, flat ski, resulting from the decline of the front contact line, results in a decrease in the contact length, even when the ski is inclined. Usually, the search for a sufficiently long contact length naturally goes through an increase in the bearing surface, and therefore a reduction in handling.
L'objectif de l'invention est donc de fournir un ski qui permette de combiner à la fois de bonnes propriétés de maniabilité ski à plat, avec une conduite optimale de virage grâce à une longueur de contact suffisante lorsque le ski est incliné.The objective of the invention is therefore to provide a ski that allows to combine both good ski handling properties flat, with an optimal turn behavior through a sufficient contact length when the ski is inclined.
L'invention concerne donc un ski sur lequel on peut définir différents points sur sa longueur. Ainsi, lorsque le ski est à plat sur un plan horizontal, et qu'il est chargé en son centre de telle sorte que les carres touchent le plan horizontal au niveau du patin, le ski présente une surface de contact, et une longueur de contact au niveau des carres, qui s'étendent entre les lignes de contact avant et arrière. A l'inverse, lorsque le ski est pivoté autour de son axe longitudinal, et qu'il est donc incliné d'un angle non nul par rapport au même plan horizontal, tout en étant chargé en son patin de telle sorte que l'une des carres touche le plan horizontal au niveau du patin, le ski présente alors une longueur de contact qui s'étend des points de contact extrême dénommés ci-après « points de contact extrême avant » et « points de contact extrême arrière ». On précise que lorsque le ski est incliné, une force est exercée perpendiculairement à sa face supérieure et au niveau du patin, de manière à contrarier le cambre naturel de la planche, de sorte qu'en fonction du rayon de courbure de la ligne de cote, le ski se déforme jusqu'à ce que la carre vienne en contact complet avec le plan horizontal au niveau du patin.The invention therefore relates to a ski on which it is possible to define different points along its length. Thus, when the ski is flat on a horizontal plane, and is loaded at its center so that the edges touch the horizontal plane at the pad, the ski has a contact surface, and a contact length at the edges, which extend between the front and rear contact lines. Conversely, when the ski is pivoted about its longitudinal axis, and is therefore inclined at a non-zero angle relative to the same horizontal plane, while being loaded in its pad so that one edges touch the horizontal plane at the level of the pad, the ski then has a contact length which extends from the extreme contact points hereinafter referred to as "forward contact points" and "extreme rear contact points". It is specified that when the ski is inclined, a force is exerted perpendicular to its upper face and at the level of the pad, so as to thwart the natural camber of the board, so that depending on the radius of curvature of the dimension line , the ski is deformed until the edge comes into complete contact with the horizontal plane at the level of the pad.
Conformément à une première caractéristique de l'invention, pour une inclinaison de 35°, le ratio de la distance séparant la ligne de contact avant et le point de contact extrême avant, rapportée à la distance séparant le point milieu de la chaussure à la ligne de contact avant, est supérieur à 12%. Pour une inclinaison de 45°, le même ratio est supérieur à 15%, préférentiellement compris entre 18% et 21%.According to a first characteristic of the invention, for a tilt of 35 °, the ratio of the distance separating the front contact line and the forward contact point, relative to the distance separating the midpoint of the shoe to the line. forward contact is greater than 12%. For an inclination of 45 °, the same ratio is greater than 15%, preferably between 18% and 21%.
Autrement dit, le ski conforme à l'invention présente une géométrie telle que la longueur de contact en situation de virage, c'est-à-dire lorsque le ski est incliné, est nettement supérieure à la longueur de contact lorsque le ski est à plat. En d'autres termes, la longueur de contact en ski incliné, qui est particulièrement utile pour la conduite du virage, est relativement importante, comparée à la longueur de contact lorsque le ski est à plat, c'est-à-dire dans une situation où il est donc avantageux qu'elle soit plus faible pour faciliter la maniabilité du ski. Pour obtenir ce résultat, il est possible en particulier de choisir une ligne de cote adaptée, ainsi que des profils adaptés de cambre, de hauteur spatule et de hauteur talon, pour chaque taille de ski.In other words, the ski according to the invention has a geometry such that the contact length in cornering situation, that is to say when the ski is inclined, is significantly greater than the contact length when the ski is flat. In other words, the contact length in inclined ski, which is particularly useful for driving the turn, is relatively large, compared to the length of contact when the ski is flat, that is to say in a situation where it is advantageous that it is lower to facilitate the handling of the ski. To obtain this result, it is possible in particular to choose a suitable side line, as well as adapted camber profiles, spatula height and heel height, for each ski size.
En pratique, la mesure d'allongement de la longueur de contact faite en comparant le ski à plat avec le ski dans une inclinaison de 35° est supérieure à 70 millimètres, et même de plus de 90 millimètres pour une inclinaison de 45°.In practice, the measure of elongation of the contact length made by comparing the flat ski with the ski in an inclination of 35 ° is greater than 70 millimeters, and even more than 90 millimeters for an inclination of 45 °.
Selon une autre caractéristique de l'invention, il est possible de définir sur le ski une « ligne de contact avancée », qui correspond à la limite avant de la zone de contact du ski sur un plan horizontal lorsque le ski est d'une part, appliqué sur ce plan horizontal au niveau de son patin, et qu'en outre il reçoit une force verticale correspondant à une masse de 2 kg au niveau de son extrémité avant. Autrement dit, le ski est chargé au niveau de son patin de telle sorte que son cambre est annulé et complémentairement, le ski est également chargé au niveau de son extrémité avant, mais avec une force correspondant à une masse de 2 kg, de telle sorte que la surface de contact s'allonge jusqu'à la ligne de contact avancée caractéristique. Au delà de cette ligne de contact avancée, se situe la partie de la spatule utile pour que le ski n'enfourne pas dans la neige. Cette zone de spatule a un rayon de courbure de l'ordre de 150 à 200 millimètres.According to another characteristic of the invention, it is possible to define on the ski an "advanced contact line", which corresponds to the front limit of the contact zone of the ski on a horizontal plane when the ski is on the one hand , applied on this horizontal plane at the level of its pad, and that in addition it receives a vertical force corresponding to a mass of 2 kg at its front end. In other words, the ski is loaded at its skate so that its camber is canceled and complementarily, the ski is also loaded at its front end, but with a force corresponding to a mass of 2 kg, so the contact surface extends to the characteristic advanced contact line. Beyond this line of advanced contact, is the part of the spatula useful for the ski does not put in the snow. This spatula zone has a radius of curvature of the order of 150 to 200 millimeters.
Conformément à l'invention, au niveau de la ligne de contact avancée, lorsque le ski à plat n'est plus chargé au niveau de son extrémité, mais simplement au niveau de son patin, la semelle est séparée du plan horizontal d'une hauteur comprise entre 1 et 2 mm. Autrement dit, en définissant sur chaque ski la ligne de contact avancée, il est possible de mesurer la hauteur qui sépare la semelle du plan horizontal lorsque le ski est mis à plat, dans les conditions de mesure de la norme ISO 6289, étant entendu que la détermination des lignes de contact et des points de contact extrêmes se fait avec une jauge de 0,1 mm et non pas 0,5 comme préconisé par ladite norme.According to the invention, at the advanced contact line, when the flat ski is no longer loaded at its end, but simply at its skate, the sole is separated from the horizontal plane by a height between 1 and 2 mm. In other words, by defining on each ski the advanced contact line, it is possible to measure the height which separates the sole of the horizontal plane when the ski is laid flat, under the measurement conditions of ISO 6289, it being understood that the determination of the contact lines and the extreme contact points is done with a gauge of 0.1 mm and not 0.5 as recommended by said standard.
Selon une autre caractéristique de l'invention, le point de contact extrême avant tel que défini ci-avant, et pour une inclinaison du ski de 45°, est distant de la ligne de contact avancée également définie ci-avant d'une distance inférieure à 4 cm, voire 3 cm, et de préférence 2 cm, en avant ou en arrière de cette dite ligne.According to another characteristic of the invention, the front end contact point as defined above, and for a slope of the ski of 45 °, is distant from the contact line advanced also defined above by a distance of less than 4 cm, or even 3 cm, and preferably 2 cm, in front of or behind said line.
Conformément à une autre caractéristique de l'invention, le point milieu entre les points de contact extrêmes avant et arrière se déplace vers l'avant du ski lorsque l'angle d'inclinaison de ce dernier augmente. Autrement dit, le milieu de la longueur de contact, déterminée toujours en chargeant le ski à son patin de telle sorte à faire venir la carre sur le plan horizontal, présente une évolution spécifique. En effet, ce point milieu de la longueur de contact est d'autant plus avancé que l'angle d'inclinaison du ski est important. En d'autres termes, plus le ski est incliné, plus le point milieu de la longueur de contact s'avance. Ce point est en général situé au-delà du point milieu de chaussure, c'est-à dire le « point de montage » selon la définition de la norme ISO 6289. Dans ces conditions, le skieur se retrouve avec un point d'application de son poids de plus en plus en arrière du milieu de la longueur de contact, lorsque l'angle d'inclinaison de ski augmente, ce qui améliore la conduite du ski, et permet d'obtenir un ski de plus en plus performant.According to another characteristic of the invention, the midpoint between the front and rear extreme contact points moves towards the front of the ski when the angle of inclination of the latter increases. In other words, the middle of the contact length, always determined by loading the ski to its skate so as to bring the edge on the horizontal plane, has a specific evolution. Indeed, this midpoint of the contact length is even more advanced than the angle of inclination of the ski is important. In other words, the more the ski is inclined, the more the middle point of the contact length moves forward. This point is usually located beyond the middle point of the shoe, ie the "mounting point" according to the definition of ISO 6289. In these conditions, the skier is left with a point of application its weight more and more behind the middle of the contact length, when the ski inclination angle increases, which improves the driving of the ski, and allows to obtain a more and more successful ski.
La manière de réaliser l'invention, ainsi que les avantages qui en découlent, ressortiront bien de la description du mode de réalisation qui suit, puis des figures annexées dans lesquelles :
- la
figure 1 est une vue de côté d'un ski conforme à l'invention, montré non chargé ; - la
figure 2 est une vue de côté du ski de lafigure 1 , mis à plat, et montré chargé en son patin ; - la
figure 3 est une vue de côté montrant le ski de lafigure 1 incliné à 45°, et chargé en son centre ; - la
figure 4 est une vue en coupe selon le plan IV-IV de lafigure 3 ; - la
figure 5 est une vue en perspective sommaire d'une installation sur laquelle sont mesurés les paramètres caractéristiques de deux skis conformes à l'invention ; - la
figure 6 est une vue en perspective sommaire montrant un des skis de lafigure 5 sous un angle de trois quarts dessous ; - la
figure 7 est une vue de côté du ski de lafigure 1 montré chargé au niveau de son extrémité avant ; - la
figure 8 est une vue de côté du ski de lafigure 7 , montré chargé uniquement au niveau du patin, dans lequel sont représentés certains paramètres caractéristiques.
- the
figure 1 is a side view of a ski according to the invention, shown unfilled; - the
figure 2 is a side view of the ski from thefigure 1 , laid flat, and shown loaded in his skate; - the
figure 3 is a side view showing the ski from thefigure 1 inclined at 45 °, and loaded at its center; - the
figure 4 is a sectional view along plane IV-IV of thefigure 3 ; - the
figure 5 is a perspective perspective view of an installation on which are measured the characteristic parameters of two skis according to the invention; - the
figure 6 is a summary perspective view showing one of the skis from thefigure 5 at an angle of three quarters below; - the
figure 7 is a side view of the ski from thefigure 1 shown loaded at its front end; - the
figure 8 is a side view of the ski from thefigure 7 , shown loaded only at the pad, in which are represented some characteristic parameters.
Bien entendu, les formes et dimensions montrées aux figures ne le sont qu'à titre illustratif. Elles peuvent ainsi différer de la réalité et sont dans certains cas exagérées ou hors de proportion, uniquement dans le but de faciliter la compréhension de l'invention.Of course, the shapes and dimensions shown in the figures are only illustrative. They may thus differ from reality and are in some cases exaggerated or out of proportion, solely for the purpose of facilitating the understanding of the invention.
Comme illustré à la
De manière conventionnelle, le ski possède une marque 9 matérialisant le milieu de la chaussure de l'utilisateur, ou selon la dénomination de la norme ISO 6289 le « point de montage », et par rapport auquel seront montés les éléments de la fixation de sécurité.Conventionally, the ski has a
Lorsque, comme illustré à la
Entre les deux lignes de contact avant 10 et arrière 11, est définie de façon normalisée la zone patin 16. A l'arrière de la ligne de contact 11, est défini le talon 17 qui se termine par l'extrémité arrière 18 de la planche. Il est possible que le talon 17 présente également une structure analogue à celle de la spatule, avec deux zones présentant des rayons de courbure nettement différents, sans toutefois que cela soit obligatoire. De même, selon l'invention le talon 17 présente un « profil talon » particulier, c'est-à-dire une évolution de hauteur de la surface inférieure du talon par rapport au plan horizontal 2. Le ski présente une ligne de cote qui s'élargit au-delà des lignes de contact avant 10 et arrière 11.Between the two front and
Ainsi, lorsque le ski est à plat comme illustré à la
Selon une caractéristique de l'invention, la longueur de contact évolue d'une manière particulière lorsque le ski est incliné latéralement. Ainsi, lorsque le ski est incliné en le pivotant autour d'un axe parallèle à son axe longitudinal, il repose sur le plan horizontal au niveau de deux zones de contact situées chacune dans la spatule et le talon. Dans le cas le plus fréquent où le ski présente une ligne de cote creusée, la carre n'est pas au contact du plan horizontal au milieu du patin, tant que le ski n'est pas chargé. Toutefois, comme illustré aux
Plus précisément, le mode opératoire permettant de mesurer les différentes longueurs de contact caractéristiques, est illustré aux
A l'extrémité de la tige 55 du vérin, on dispose une plaque 56 qui permet de venir prendre appui sur la face supérieure de la planche 1. Il est également possible que cette plaque vienne en prise dans les éléments constituant la fixation de sécurité. Cette plaque 56 permet ainsi de répartir une partie des efforts exercés par le vérin sur une zone du patin environnant le point milieu de chaussure en s'assurant également que l'effort est exercé perpendiculairement à la surface du ski. Ainsi, dans la configuration illustrée à droite dans la
Pour effectuer la mesure de la longueur de contact lorsque le ski 71 est incliné sur la carre avec un angle α, on positionne le point d'accroche 54 du vérin de telle sorte que sa tige forme un angle α avec une perpendiculaire au plan de la table. Dans un mode préférentiel, la plaque située en bout de tige du vérin est solidaire de la planche de telle sorte que le réglage de l'angle du vérin fixe l'inclinaison de la planche par rapport au plan avec le même angle α.To measure the length of contact when the
Un effort est ensuite exercé par la tige du vérin de telle sorte que, comme illustré à la
Selon une autre caractéristique de l'invention, il est également possible de déterminer un point présentant un intérêt vis-à-vis du positionnement des points de contact extrêmes, en particulier dans la zone spatule. Un tel point est déterminé comme illustré à la
En pratique, cet effort est choisi à une valeur équivalente à 2 kg, de telle sorte que la surface de contact entre la semelle et le plan horizontal 2 s'allonge par rapport à la longueur portante lorsque le ski n'est chargé qu'en son patin. Cette limite, dénommée « ligne de contact avancée », forme le repère 30 sur le ski. La ligne de cote du ski s'élargit du patin jusqu'à cette ligne de contact avancée, et peut au-delà, soit continuer à s'élargir, soit commencer à se rétrécir en direction de l'extrémité du ski.In practice, this effort is chosen to a value equivalent to 2 kg, so that the contact surface between the sole and the
Comme illustré à la
Selon une autre caractéristique de l'invention, la hauteur h séparant la semelle du plan horizontal 2, lorsque le ski est à plat, chargé au patin, au niveau de la ligne de contact avancée 30, est comprise entre 1 et 2 mm.According to another characteristic of the invention, the height h separating the sole of the
On a par ailleurs constaté pour les skis conformes à l'invention, que pour une inclinaison α de 45°, le point de contact extrême avant 24 est, proche de la ligne de contact avancée 30, et s'en trouve à moins de 40 mm, voire 30 mm, de préférence 20 mm environ, en avant ou en arrière.It has also been found for skis according to the invention, that for an inclination α of 45 °, the extreme contact point before 24 is close to the
Les paramètres du ski, en particulier la ligne de cote et les profils de hauteur spatule et talon, sont choisis de telle manière que la longueur de contact en spatule augmente en fonction de l'angle α de prise de carre, de façon progressive jusqu'à une valeur limite proche de la ligne de contact avancée 30. Au niveau du talon, la position de point de contact extrême arrière 23 peut s'éloigner très peu de la position de la ligne de contact arrière 11, ou se déplacer vers l'arrière lorsque l'angle α de prise de carre augmente. Il est avantageux que le déplacement du point extrême arrière 23 augmente moins vite que le déplacement du point extrême avant 24. Au niveau de ce point de contact extrême arrière 23, pour une inclinaison de 45°, la hauteur séparant la semelle du plan horizontal est inférieure à 1mm, lorsque le ski est à plat et chargé au patinThe ski parameters, in particular the dimension line and the spatula and heel height profiles, are chosen in such a way that the spatula contact length increases in the angle α of edge grip, progressively to a limit value close to the
Selon une autre caractéristique de l'invention, il est intéressant de noter que le milieu de la longueur de contact pour différentes inclinaisons α, évolue d'une manière qui est favorable à la conduite des virages. Ainsi, comme illustré à la
Un exemple particulier, et en aucun cas limitatif, présente les paramètres dimensionnels suivants :
- longueur du ski : 166 cm
- position du point milieu de chaussure 9 : 780 mm à partir de l'extrémité arrière 18
- position par rapport au point milieu de
chaussure 9, ligne de cote (ou largueur), et hauteur par rapport au plan horizontal ski chargé à plat au patin, pour plusieurs points particuliers, selon le tableau ci-après.
- ski length: 166 cm
- position of the middle point of shoe 9: 780 mm from the
rear end 18 - position relative to the midpoint of the
shoe 9, line of dimension (or width), and height relative to the horizontal plane ski loaded flat to the pad, for several particular points, according to the table below.
Il ressort de ce qui précède que le ski conforme à l'invention présente de multiples avantages, en particulier celui de combiner à la fois une bonne maniabilité lorsque le ski est à plat avec une bonne conduite de virage lorsque le ski est incliné, grâce à une longueur de contact relativement rallongée. Cet accroissement de longueur de contact est suffisamment importante pour que la différence entre le ski à plat et le ski sur la carre à 45° soit significative. De ce fait, selon l'invention, le skieur possède un ski de longueur donnée, longueur qu'il utilise de façon optimale à partir d'un angle de prise de carre de 45°, mais qui est équivalent à un ski de longueur plus court à plat, d'environ 15%. A titre d'exemple, un ski de longueur 166 cm, correspond à plat à un ski de taille environ 141 cm, et un ski de 176 cm correspond à plat à un ski de taille 153 cm. Ces skis présentent un intérêt particulier pour une pratique sur piste, et présentent donc une largeur au patin inférieure à 85 mm environ, voire même de préférence inférieure à 80 mm.It follows from the foregoing that the ski according to the invention has many advantages, in particular that of combining both good handling when the ski is flat with good cornering behavior when the ski is inclined, thanks to a relatively longer contact length. This increase in contact length is large enough that the difference between the flat ski and the ski on the edge at 45 ° is significant. Therefore, according to the invention, the skier has a ski of given length, which he optimally uses from a corner angle of 45 °, but which is equivalent to a ski of longer length. short flat, about 15%. For example, a ski 166 cm long, corresponds flat to a ski size about 141 cm, and a ski of 176 cm corresponds flat to a ski size 153 cm. These skis are of particular interest for a track practice, and therefore have a shoe width less than 85 mm or even preferably less than 80 mm.
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1050110A FR2955035B1 (en) | 2010-01-08 | 2010-01-08 | ALPINE SKIING |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2343107A1 true EP2343107A1 (en) | 2011-07-13 |
Family
ID=42768140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10306451A Withdrawn EP2343107A1 (en) | 2010-01-08 | 2010-12-17 | Alpine ski |
Country Status (3)
Country | Link |
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US (1) | US8684393B2 (en) |
EP (1) | EP2343107A1 (en) |
FR (1) | FR2955035B1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2514495A1 (en) * | 2011-04-18 | 2012-10-24 | Head Technology GmbH | Rocker ski with at least 2 sidecut radiuses |
WO2013018044A2 (en) | 2011-08-01 | 2013-02-07 | Serge Dupraz | Compact ski with advanced weight bearing |
EP2596839A1 (en) * | 2011-11-24 | 2013-05-29 | ATOMIC Austria GmbH | Climbing aid for attachment to the underside of a ski which can be detached when needed and a ski in combination with a climbing aid |
EP3045212A1 (en) | 2015-01-19 | 2016-07-20 | Mojmir Flisek | Ski edge and sidewall cross section profile |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2985914B1 (en) * | 2012-01-19 | 2014-01-03 | Rossignol Sa | BOARD OF SLIDERS |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2786108A1 (en) * | 1998-11-25 | 2000-05-26 | Salomon Sa | Ski for snow skiing with variable width of point provides improved powder snow characteristics without decrease in compact snow performance |
EP1120137A1 (en) * | 2000-01-28 | 2001-08-01 | Skis Rossignol S.A. | Alpine ski |
EP1410826A1 (en) * | 2002-10-15 | 2004-04-21 | Skis Rossignol S.A. | Snowboard with improved tip and lifted tail |
WO2007065280A1 (en) * | 2005-12-09 | 2007-06-14 | Kessler Hansjuerg | Snowboard |
EP1925344A1 (en) * | 2006-11-22 | 2008-05-28 | Salomon S.A. | Curve of a ski profile |
EP2082787A1 (en) * | 2008-01-25 | 2009-07-29 | Skis Rossignol | Glide board for powder snow |
-
2010
- 2010-01-08 FR FR1050110A patent/FR2955035B1/en active Active
- 2010-12-13 US US12/966,724 patent/US8684393B2/en not_active Expired - Fee Related
- 2010-12-17 EP EP10306451A patent/EP2343107A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2786108A1 (en) * | 1998-11-25 | 2000-05-26 | Salomon Sa | Ski for snow skiing with variable width of point provides improved powder snow characteristics without decrease in compact snow performance |
EP1120137A1 (en) * | 2000-01-28 | 2001-08-01 | Skis Rossignol S.A. | Alpine ski |
EP1410826A1 (en) * | 2002-10-15 | 2004-04-21 | Skis Rossignol S.A. | Snowboard with improved tip and lifted tail |
WO2007065280A1 (en) * | 2005-12-09 | 2007-06-14 | Kessler Hansjuerg | Snowboard |
EP1925344A1 (en) * | 2006-11-22 | 2008-05-28 | Salomon S.A. | Curve of a ski profile |
EP2082787A1 (en) * | 2008-01-25 | 2009-07-29 | Skis Rossignol | Glide board for powder snow |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2514495A1 (en) * | 2011-04-18 | 2012-10-24 | Head Technology GmbH | Rocker ski with at least 2 sidecut radiuses |
WO2013018044A2 (en) | 2011-08-01 | 2013-02-07 | Serge Dupraz | Compact ski with advanced weight bearing |
FR2978672A1 (en) * | 2011-08-01 | 2013-02-08 | Serge Dupraz | SKI COMPACT SUPPORTED ADVANCE |
WO2013018044A3 (en) * | 2011-08-01 | 2013-03-28 | Serge Dupraz | Compact ski with advanced weight bearing |
EP2596839A1 (en) * | 2011-11-24 | 2013-05-29 | ATOMIC Austria GmbH | Climbing aid for attachment to the underside of a ski which can be detached when needed and a ski in combination with a climbing aid |
US9027951B2 (en) | 2011-11-24 | 2015-05-12 | Atomic Austria Gmbh | Climbing aid which can be secured in a detachable manner as necessary onto the underside of a ski and a ski in combination with a climbing aid |
EP3045212A1 (en) | 2015-01-19 | 2016-07-20 | Mojmir Flisek | Ski edge and sidewall cross section profile |
Also Published As
Publication number | Publication date |
---|---|
FR2955035B1 (en) | 2012-12-28 |
US20110169248A1 (en) | 2011-07-14 |
US8684393B2 (en) | 2014-04-01 |
FR2955035A1 (en) | 2011-07-15 |
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