EP0872264B1 - Interface between ski boot support plate and ski - Google Patents

Interface between ski boot support plate and ski Download PDF

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Publication number
EP0872264B1
EP0872264B1 EP98106462A EP98106462A EP0872264B1 EP 0872264 B1 EP0872264 B1 EP 0872264B1 EP 98106462 A EP98106462 A EP 98106462A EP 98106462 A EP98106462 A EP 98106462A EP 0872264 B1 EP0872264 B1 EP 0872264B1
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EP
European Patent Office
Prior art keywords
ski
platform
support
skis
lower plate
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EP98106462A
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German (de)
French (fr)
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EP0872264A1 (en
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Philippe Commier
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Salomon SAS
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Salomon SAS
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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
    • A63C9/00—Ski bindings

Definitions

  • the invention relates to an interface device between a shoe and a ski. It also relates to a ski having such an interface device, as well as a set of retaining elements of a boot on the ski and a ski equipped with such an assembly.
  • a ski is a flexible, elongated beam on which a boot is releasably retained on a ski by two retaining elements.
  • the ski has two elongated edges laterally which are intended to ensure the grip of the ski on snow, and which contribute to driving qualities of the ski, especially when cornering.
  • the ski During the glide, the ski is subjected to constraints coming from the weight of the skier, his driving impulses and the reaction of the terrain on which the ski evolves. When cornering, these constraints are accentuated by acceleration due to the curvature of the trajectory. Depending on these different parameters, the ski flexes given its own bending parameters which have been determined to construction.
  • This device makes it easier to control the pivoting of the ski. However, it has little or no effect on the theoretical trajectory of skiing on snow, in particular on the radius of curvature of the trajectory of the ski when cornering in pipe cut. Overall, the radius of curvature of the ski trajectory is determined by the curvature of the projection of the ski edge on which the ski rests on the sliding surface.
  • this radius of curvature of trajectory depends mainly the general curvature of the ski s dimension line, and the distribution of flexibility over the length of the ski. It should be emphasized here that the margin maneuver on these parameters is still relatively limited if we wishes to maintain good general skiing behavior in other situations.
  • the trajectory radius of curvature also depends on the lateral stiffness of the ski, and the angle of the ski in relation to the snow.
  • US Patent 5,558,354 discloses a gliding device comprising two platforms shoe support mounted on two skis. Each of the platforms is coupled to both skis by a deformable structure with articulated links. When cornering, structures ensure a synchronized inclination of the skis which support the platforms, and the skis rest on the snow like a traditional pair of skis. he This results in a better ability of the machine to turn and to be controlled by the skier.
  • Such a construction provides an original solution to a gliding device of the type snowboard, monoski or snowboard where the two skier's boots are assembled on the same board. Indeed, instead of standing on a side edge when cornering, the machine rests on the edges of the two skis.
  • Such a mode of support is entirely common in traditional alpine skiing where on top of that both skis are independent, where the skier can control his support on each of the skis.
  • the invention aims to improve the control of the ski of a pair of alpine skis, in particular to allow the skier to cut the turns according to a shorter natural radius as needed.
  • the skier can act himself on the radius of curvature of its turn trajectory, according to a range of radii more extended towards the small rays.
  • the interface device between a support platform of a ski boot and a ski is characterized in that it comprises at least one support for connection with an upper plate, a lower plate, the plates having a width neighboring and being connected together by two rods or ribs inclined in the same direction and not parallel, so as to form in cross section a structure in deformable quadrilateral of which at least two sides are not parallel.
  • the skier's shoe prints a given inclination to the ski plate, and the connection between the plate and the base makes the base and the ski take an additional tilt to the snow.
  • the contact line of the skis presents a decrease in the radius of curvature.
  • the skier's tibial axis is less inclined compared to a traditional ski.
  • the skier who controls this additional inclination by its support on the ski.
  • the ski itself in flexing, controls this additional inclination of the plate.
  • FIGS 1 and 2 schematically illustrate the effect produced by the the invention.
  • Figure 3 shows a first embodiment of the invention.
  • FIG. 4 illustrates the operation of the device of FIG. 3.
  • FIG. 5 is an exploded perspective view of the device of FIG. 3.
  • Figure 6 shows a complete device assembled to the middle part of a ski.
  • FIG. 7 is a top view of the device in FIG. 6.
  • Figure 8 relates to an alternative embodiment of a support.
  • FIGS 9 and 10 illustrate the operation of the device of Figure 8.
  • FIG. 11 illustrates another embodiment of the invention.
  • FIGS 1 and 2 schematically illustrate the general principle of the invention.
  • Figure 1 shows in section the middle part of a ski 1 which is surmounted by a platform 2.
  • Platform 2 supports the shoe (not shown in the figure). It is suspended above the ski by a link with the ski which will be described in detail later.
  • the ski has in known manner a lower sliding surface 3 bordered by two lateral edges 4 and 5, and an upper surface 6.
  • the lateral sides of the ski and the edges 4 and 5 have, along the length of the ski, a curved shape with a nominal radius of curvature which is of the order of 20 to 40 meters, this figure only having an indicative value.
  • FIG. 1 represents the ski moving flat on a sliding surface such that snow.
  • the lower surface 3 the two lateral edges 4 and 5 rest on the snow.
  • the platform 2 which supports the shoe is subject to a vertical force F shown diagrammatically by the arrow 8, and the platform is substantially parallel to the upper surface 6 of the ski and it is centered laterally by compared to skiing.
  • a ski has this configuration in a straight line for example.
  • FIG. 2 represents the same ski inclined relative to its surface devolution.
  • a ski has this configuration, especially when cornering.
  • this is the ski outside the turn, that is to say the one on which the skier places most of his support.
  • edge 5 is the internal edge of the turn.
  • the skier prints an inclination to the ski by tilting his shoes, which has the effect of tilting the platform 2 at an equal angle.
  • support F 'of the skier on his ski is shown schematically in the figure by the arrow 9. This support F' is greater than F, in relation to the acceleration due to the curvature of the trajectory and the fact that the skier relies more on outdoor skiing.
  • the link which connects the platform to the ski captures the variation of support and reacts to this variation of support by forcing the ski to take an incline additional.
  • the ski tilts more than the platform by in relation to the skier's tibial axis. If necessary we also capture the meaning inclination of the ski to differentiate the action of the link depending on whether the ski is in internal or external position at the turn.
  • FIG. 2 represents the ski 1 with an inclination relative to the snow which is greater than the inclination of platform 2, hence an increase the edge grip angle of the ski.
  • the additional slope of the ski induces an additional deflection of the ski which has the secondary effect of reducing the instantaneous radius of curvature of the edge in contact with snow, i.e. to decrease the radius of curvature of the edge trajectory on snow.
  • the angular offset between the ski and the platform brings it closer to the internal edge 5 the direction in which the skier's support is applied in the direction of the inner square.
  • FIG. 3 represents a first embodiment of a connection.
  • This link includes a link support 10 placed between a platform 2 and a ski 1.
  • the support 10 comprises an upper plate 12 which supports the platform, and a lower plate 13 which is fixed to the upper surface of the ski.
  • the turntables each have a width which is close to the width of the ski.
  • the plates 12 and 13 are connected by a set of two links 15 and 16, the connections being made around axes of articulation parallel to the direction longitudinal defined by the ski. Any other suitable mode of connection could also suit.
  • the two rods are inclined in the same direction relative to the vertical. In addition, they have a different length.
  • the two links 15 and 16 are inclined from bottom to top and from the outside to the inside of the turn.
  • the link 16 located on the internal side of the turn is shorter and more inclined by compared to a horizontal plane than the other link 15.
  • This link 16 is the link drive to which a large part of the support efforts of the skier refers.
  • the other ski has a symmetrical arrangement.
  • a prestressed elastic return means such as an elastically block 18 deformable, or a spring, or the like, is interposed between the two plates.
  • This block 18 recalls the plate towards its high rest position, where it bears against a stop 20 located on the side of the link 15.
  • the two plates and the two rods together form a deformable quadrilateral structure against the return force of the pre-stressed block 18. At least two sides of the quadrilateral are not parallel. These sides are actually formed by the rods.
  • block 18 The stiffness of block 18 is chosen so that the block compresses and the plate upper collapses under the support of the skier when the ski is in a corner, in the position outside the corner. Block 18 brings back the stage higher in stop in other circumstances.
  • the collapsed position of the upper plate is shown in the figure 4.
  • the two rods 15 and 16 forced the upper plate to move relative to the plate lower according to a rocking movement which brings the lower plate and therefore the ski to take with respect to the snow a slope greater than that of the upper plate.
  • the plate upper 2 is offset on the side of the edge 5 internal to the turn.
  • Figure 5 shows in exploded perspective the connection support 10. There recognizes the different parts described, the plates 12, 13, the links 15, 16, and the connecting axes 22, 23, 24, 25 of the links to the plates.
  • Figures 6 and 7 show a complete interface device assembled on the middle part of a ski.
  • the device shown comprises a platform 2 with a zone of front mounting 30 where a front retainer 31 is assembled, and a zone rear mounting 32 with a rear retainer 33. So advantageous, as the retaining elements are assembled on the same platform independent of the ski, the forces due to the pinching of the boot pass through by the platform and not by the ski.
  • the platform is connected to the ski by four connecting supports 10a, 10b, 10c, 10d which are similar to the support 10 previously described.
  • one support has a longitudinal clearance limited to the operating clearance.
  • This support is by example the support 10c placed at the rear support of the shoe.
  • the other supports have ample longitudinal play.
  • This game is planned for example at the connection between the rods and the upper plates.
  • the pre-stressed blocks which equip the various connection supports can have the same stiffness or not.
  • Figure 8 shows an alternative embodiment of a connecting support.
  • the support 35 which is represented is similar to the support 10 previous, with in particular the upper 36 and lower 37 plates connected by links.
  • a balance cam 38 is further suspended from an axis 39 carried by the upper plate.
  • Cam 38 is located on the side of the longest link and the more inclined, that is to say towards the outside of the skis.
  • the support cam is designed to retract when the ski is in position external to the turn. This operating mode is illustrated in Figure 9.
  • the cam is retracted by gravity, taking into account the angle of inclination of the outside ski which is greater than the equilibrium angle induced by the centrifugal force.
  • part of the mass of the cam is deported. The support then works in the same way as what has been described previously.
  • FIG. 10 shows the same ski in the internal ski position at the turn. Drug 38 then opposes the relative movement of the plates. Under these conditions, the device is not active for internal skiing when cornering.
  • FIG. 11 shows a device similar to that of Figures 6 and 7.
  • the device comprises in particular a platform 54 connected to the ski by four connecting supports 55a, 55b, 55c, 55d.
  • Under the plate, deported laterally on the side of the longest and most inclined link are two cleats 57 and 58.
  • Two levers 59 and 60 are supported on the cleats, so to be able to exert on them a pulling force downwards.
  • the levers are articulated at 61, 62 with respect to a base assembled integrally with the ski, and they are interconnected by an incompressible bar 63.
  • the upper and lower plates could be integrated to the platform or to the ski, respectively.
  • the articulated links could be replaced by connecting ribs formed in one piece with the turntables.
  • the joints would in this case be replaced by areas of flexing of the ribs.

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Abstract

The assembly comprises an upper plate (12) to receive the ski boot and a lower plate (13) connected to the surface of the ski (1), connected by pivoted links or ribs (15, 16). The links are inclined in the same direction but are not parallel to one another, so that they form a deformable quadrilateral structure with at least two sides that are not parallel. The assembly incorporates a block (18) of a pre-compressed elastic material between the two plates and a stop (20) on the lower plate to which the upper plate is returned by the elastic block in the rest position, when the two plates are parallel. In the rest position one of the two links is inclined at about 60 degrees to the lower plate and the other at 30-50 degrees. A variant of the design can incorporate a balancing cam pivoted on the upper plate's underside.

Description

L'invention concerne un dispositif d'interface entre une chaussure et un ski. Elle concerne également un ski présentant un tel dispositif d'interface, ainsi qu'un ensemble d'éléments de retenue d'une chaussure sur le ski et un ski équipé d'un tel ensemble.The invention relates to an interface device between a shoe and a ski. It also relates to a ski having such an interface device, as well as a set of retaining elements of a boot on the ski and a ski equipped with such an assembly.

De façon connue, un ski est une poutre longiligne flexible sur laquelle une chaussure est retenue de façon libérable sur un ski par deux éléments de retenue. De façon également connue, le ski présente latéralement deux carres longilignes qui sont destinées à assurer l'accroche du ski sur la neige, et qui contribuent aux qualités de conduite du ski, en particulier dans les virages.In known manner, a ski is a flexible, elongated beam on which a boot is releasably retained on a ski by two retaining elements. In a manner also known, the ski has two elongated edges laterally which are intended to ensure the grip of the ski on snow, and which contribute to driving qualities of the ski, especially when cornering.

Au cours de la glisse, le ski est soumis à des contraintes provenant du poids du skieur, de ses impulsions de conduite et de la réaction du terrain sur lequel le ski évolue. Dans les virages, ces contraintes sont accentuées par l'accélération due à la courbure de la trajectoire. En fonction de ces différents paramètres, le ski fléchit compte tenu de ses propres paramètres de flexion qui ont été déterminés à la construction.During the glide, the ski is subjected to constraints coming from the weight of the skier, his driving impulses and the reaction of the terrain on which the ski evolves. When cornering, these constraints are accentuated by acceleration due to the curvature of the trajectory. Depending on these different parameters, the ski flexes given its own bending parameters which have been determined to construction.

On connaít cependant des dispositifs interfaces qui influent activement sur la flexion du ski selon les appuis du skieur sur ses skis. Ainsi, la demande de brevet français publiée sous le numéro FR-A-2 711 321 décrit un dispositif qui modifie la répartition de pression du ski sur la neige de façon dynamique avec le transfert de poids du skieur sur ces skis. Ce dispositif comprend un palpeur mobile verticalement sur lequel le talon de la chaussure repose. Le palpeur active un basculeur qui est relié par des articulations transversales à un bras avant et un bras arrière. Les bras sont reliés solidairement à l'avant et l'arrière du ski. Un appui plus prononcé du skieur sur le palpeur provoque une contrainte de traction sur les bras, qui soulage l'appui des extrémités du ski sur la neige, et concentre dans la partie médiane du ski l'appui du ski sur la neige.However, there are known interface devices which actively influence the bending of the ski according to the support of the skier on his skis. So the patent application French published under the number FR-A-2 711 321 describes a device which modifies the pressure distribution of the ski on the snow dynamically with the transfer of weight of the skier on these skis. This device includes a movable probe vertically on which the heel of the shoe rests. The probe activates a rocker which is connected by transverse joints to a front arm and a rear arm. The arms are integrally connected to the front and the back of the ski. Support more pronounced by the skier on the probe causes a tensile stress on the arm, which relieves the support of the ends of the ski on the snow, and concentrates in the middle part of the ski supporting the ski on the snow.

Ce dispositif permet de contrôler plus facilement le pivotement du ski. Cependant, il n'a pas ou peu d'effet sur la trajectoire théorique du ski sur la neige, en particulier sur le rayon de courbure de la trajectoire du ski en virage effectué en conduite coupée. Globalement, le rayon de courbure de la trajectoire du ski est déterminé par la courbure de la projection de la carre de ski sur laquelle le ski s'appuie sur la surface de glisse.This device makes it easier to control the pivoting of the ski. However, it has little or no effect on the theoretical trajectory of skiing on snow, in particular on the radius of curvature of the trajectory of the ski when cornering in pipe cut. Overall, the radius of curvature of the ski trajectory is determined by the curvature of the projection of the ski edge on which the ski rests on the sliding surface.

Pour un ski standard, ce rayon de courbure de trajectoire dépend principalement de la courbure générale de la ligne de cotes du ski, et de la répartition de la souplesse sur la longueur du ski. Il faut souligner ici que la marge de manoeuvre sur ces paramètres est malgré tout relativement restreinte si l'on souhaite préserver un bon comportement général du ski dans les autres situations. Le rayon de courbure de trajectoire dépend également de la rigidité latérale du ski, et de l'angle du ski par rapport à la neige.For a standard ski, this radius of curvature of trajectory depends mainly the general curvature of the ski s dimension line, and the distribution of flexibility over the length of the ski. It should be emphasized here that the margin maneuver on these parameters is still relatively limited if we wishes to maintain good general skiing behavior in other situations. The trajectory radius of curvature also depends on the lateral stiffness of the ski, and the angle of the ski in relation to the snow.

Le brevet US 5,558,354 divulgue un engin de glisse comprenant deux plate-formes de support des chaussures montées sur deux skis. Chacune des plate-formes est accouplée aux deux skis par une structure déformable à biellettes articulées. Dans les virages, les structures assurent une inclinaison synchronisée des skis qui supportent les plate-formes, et les skis prennent appui sur la neige à la manière d'une paire de skis traditionnelle. Il résulte de cela une meilleure aptitude de l'engin à tourner et à être piloté par le skieur.US Patent 5,558,354 discloses a gliding device comprising two platforms shoe support mounted on two skis. Each of the platforms is coupled to both skis by a deformable structure with articulated links. When cornering, structures ensure a synchronized inclination of the skis which support the platforms, and the skis rest on the snow like a traditional pair of skis. he This results in a better ability of the machine to turn and to be controlled by the skier.

Une telle construction apporte une solution originale à un engin de glisse du type snowboard, monoski ou surf de neige où les deux chaussures du skieur sont assemblées sur une même planche. En effet, au lieu de se tenir sur une carre latérale en virage, l'engin prend appui sur les carres des deux skis. Un tel mode d'appui cependant est tout à fait courant dans le domaine du ski alpin traditionnel où en plus de cela les deux skis sont indépendants, où le skieur a la possibilité de contrôler ses appuis sur chacun des skis.Such a construction provides an original solution to a gliding device of the type snowboard, monoski or snowboard where the two skier's boots are assembled on the same board. Indeed, instead of standing on a side edge when cornering, the machine rests on the edges of the two skis. Such a mode of support, however, is entirely common in traditional alpine skiing where on top of that both skis are independent, where the skier can control his support on each of the skis.

L'invention a pour but d'améliorer le pilotage du ski d'une paire de skis alpins, en particulier de permettre au skieur de couper les virages selon un rayon naturel plus court suivant le besoin. Selon l'invention, en effet, pour des skis donnés, le skieur peut agir lui-même sur le rayon de courbure de sa trajectoire en virage, selon une plage de rayons plus étendue vers les petits rayons.The invention aims to improve the control of the ski of a pair of alpine skis, in particular to allow the skier to cut the turns according to a shorter natural radius as needed. According to the invention, in fact, for given skis, the skier can act himself on the radius of curvature of its turn trajectory, according to a range of radii more extended towards the small rays.

Selon l'invention, le dispositif interface entre une plate-forme de support d'une chaussure de ski et un ski est caractérisé par le fait qu'il comprend au moins un support de liaison avec une platine supérieure, une platine inférieure, les platines ayant une largeur voisine et étant reliées entre elles par deux biellettes ou nervures inclinées dans un même sens et non parallèles, de façon à former en coupe transversale une structure en quadrilatère déformable dont au moins deux côtés ne sont pas parallèles.According to the invention, the interface device between a support platform of a ski boot and a ski is characterized in that it comprises at least one support for connection with an upper plate, a lower plate, the plates having a width neighboring and being connected together by two rods or ribs inclined in the same direction and not parallel, so as to form in cross section a structure in deformable quadrilateral of which at least two sides are not parallel.

Ainsi, dans un virage coupé, la chaussure du skieur imprime une inclinaison donnée à la plaque du ski, et la liaison entre la plaque et l'embase fait que l'embase et le ski prennent une inclinaison additionnelle par rapport à la neige.Thus, in a cut corner, the skier's shoe prints a given inclination to the ski plate, and the connection between the plate and the base makes the base and the ski take an additional tilt to the snow.

On sait qu'au contact de la neige, la ligne de contact des carres internes des skis se déforme selon une courbure définie par la ligne de cotes des skis et leur inclinaison.We know that in contact with snow, the contact line of the internal edges of the skis deforms according to a curvature defined by the dimension line of the skis and their inclination.

En augmentant l'angle d'inclinaison des skis, la ligne de contact des skis présente une diminution du rayon de courbure.By increasing the angle of inclination of the skis, the contact line of the skis presents a decrease in the radius of curvature.

Il est donc possible de faire décrire aux skis une trajectoire théorique ayant un rayon de courbure plus fermé.It is therefore possible to make the skis describe a theoretical trajectory having a more closed radius of curvature.

Dit autrement, pour le même rayon de virage, l'axe tibial du skieur est moins incliné par rapport à un ski traditionnel.In other words, for the same turning radius, the skier's tibial axis is less inclined compared to a traditional ski.

Selon un premier mode de mise en oeuvre de l'invention, c'est le skieur qui pilote cette inclinaison additionnelle par ses appuis sur le ski.According to a first embodiment of the invention, it is the skier who controls this additional inclination by its support on the ski.

Selon un autre mode de mise en oeuvre de l'invention, le ski lui-même, en fléchissant, pilote cette inclinaison additionnelle de la plaque.According to another embodiment of the invention, the ski itself, in flexing, controls this additional inclination of the plate.

L'invention sera mieux comprise en se référant à la description ci-dessus et aux dessins en annexe qui en font partie intégrante.The invention will be better understood by referring to the description above and to annexed drawings which form an integral part thereof.

Les figures 1 et 2 illustrent schématiquement l'effet produit par le dispositif de l'invention.Figures 1 and 2 schematically illustrate the effect produced by the the invention.

La figure 3 montre un premier mode de mise en oeuvre de l'invention.Figure 3 shows a first embodiment of the invention.

La figure 4 illustre le fonctionnement du dispositif de la figure 3.FIG. 4 illustrates the operation of the device of FIG. 3.

La figure 5 est une vue en perspective éclatée du dispositif de la figure 3.FIG. 5 is an exploded perspective view of the device of FIG. 3.

La figure 6 montre un dispositif complet assemblé à la partie médiane d'un ski.Figure 6 shows a complete device assembled to the middle part of a ski.

La figure 7 est une vue de dessus du dispositif de la figure 6. FIG. 7 is a top view of the device in FIG. 6.

La figure 8 est relative à une variante de réalisation d'un support.Figure 8 relates to an alternative embodiment of a support.

Les figures 9 et 10 illustrent le fonctionnement du dispositif de la figure 8.Figures 9 and 10 illustrate the operation of the device of Figure 8.

La figure 11 illustre un autre mode de mise en oeuvre de l'invention.FIG. 11 illustrates another embodiment of the invention.

Les figures 1 et 2 illustrent de façon schématique le principe général de l'invention.Figures 1 and 2 schematically illustrate the general principle of the invention.

La figure 1 représente en coupe la partie médiane d'un ski 1 qui est surmontée d'une plate-forme 2. La plate-forme 2 supporte la chaussure (non représentée dans la figure). Elle est suspendue au-dessus du ski par une liaison avec le ski qui sera décrite en détail ultérieurement.Figure 1 shows in section the middle part of a ski 1 which is surmounted by a platform 2. Platform 2 supports the shoe (not shown in the figure). It is suspended above the ski by a link with the ski which will be described in detail later.

Le ski présente de façon connue une surface de glisse inférieure 3 bordée par deux carres latérales 4 et 5, et une surface supérieure 6. De façon connue, les flancs latéraux du ski et les carres 4 et 5 présentent sur la longueur du ski une forme incurvée selon un rayon de courbure nominal qui est de l'ordre de 20 à 40 mètres, ce chiffre n'ayant qu'une valeur indicative.The ski has in known manner a lower sliding surface 3 bordered by two lateral edges 4 and 5, and an upper surface 6. In known manner, the lateral sides of the ski and the edges 4 and 5 have, along the length of the ski, a curved shape with a nominal radius of curvature which is of the order of 20 to 40 meters, this figure only having an indicative value.

La figure 1 représente le ski évoluant à plat sur une surface de glisse telle que de la neige. Dans cette position, la surface inférieure 3, les deux carres latérales 4 et 5 reposent sur la neige. La plate-forme 2 qui supporte la chaussure est soumise à un effort vertical F schématisé par la flèche 8, et la plate-forme est sensiblement parallèle à la surface supérieure 6 du ski et elle est centrée latéralement par rapport au ski. Un ski présente cette configuration en ligne droite par exemple.FIG. 1 represents the ski moving flat on a sliding surface such that snow. In this position, the lower surface 3, the two lateral edges 4 and 5 rest on the snow. The platform 2 which supports the shoe is subject to a vertical force F shown diagrammatically by the arrow 8, and the platform is substantially parallel to the upper surface 6 of the ski and it is centered laterally by compared to skiing. A ski has this configuration in a straight line for example.

La figure 2 représente le même ski incliné par rapport à sa surface d'évolution. Un ski présente cette configuration notamment en virage. Pour simplifier l'explication, on supposera qu'il s'agit du ski extérieur au virage, c'est-à-dire celui sur lequel le skieur fait porter la majeure partie de ses appuis. Dans ces conditions, la carre 5 est la carre interne au virage.FIG. 2 represents the same ski inclined relative to its surface devolution. A ski has this configuration, especially when cornering. For simplify the explanation, we will assume that this is the ski outside the turn, that is to say the one on which the skier places most of his support. In these conditions, edge 5 is the internal edge of the turn.

De façon connue, le skieur imprime une inclinaison au ski en inclinant ses chaussures, ce qui a pour effet d'incliner la plate-forme 2 d'un angle égal. L'appui F' du skieur sur son ski est schématisé dans la figure par la flèche 9. Cet appui F' est supérieur à F, en rapport avec l'accélération due à la courbure de la trajectoire et le fait que le skieur s'appuie davantage sur le ski exteme.In a known manner, the skier prints an inclination to the ski by tilting his shoes, which has the effect of tilting the platform 2 at an equal angle. support F 'of the skier on his ski is shown schematically in the figure by the arrow 9. This support F' is greater than F, in relation to the acceleration due to the curvature of the trajectory and the fact that the skier relies more on outdoor skiing.

Selon l'invention, la liaison qui relie la plate-forme au ski capte la variation d'appui et réagit à cette variation d'appui en forçant le ski à prendre une inclinaison additionnelle. En d'autres termes, le ski s'incline davantage que la plate-forme par rapport à l'axe tibial du skieur. Le cas échéant on capte également le sens d'inclinaison du ski pour différencier l'action de la liaison selon que le ski se trouve en position interne ou externe au virage.According to the invention, the link which connects the platform to the ski captures the variation of support and reacts to this variation of support by forcing the ski to take an incline additional. In other words, the ski tilts more than the platform by in relation to the skier's tibial axis. If necessary we also capture the meaning inclination of the ski to differentiate the action of the link depending on whether the ski is in internal or external position at the turn.

Ainsi, la figure 2 représente le ski 1 avec une inclinaison par rapport à la neige qui est supérieure à l'inclinaison de la plate-forme 2, d'où une augmentation de l'angle de prise de carre du ski. Thus, FIG. 2 represents the ski 1 with an inclination relative to the snow which is greater than the inclination of platform 2, hence an increase the edge grip angle of the ski.

L'inclinaison additionnelle du ski induit un fléchissement additionnel du ski qui a pour effet secondaire de diminuer le rayon de courbure instantané de la carre en contact avec la neige, c'est-à-dire de diminuer le rayon de courbure de la trajectoire de la carre sur la neige.The additional slope of the ski induces an additional deflection of the ski which has the secondary effect of reducing the instantaneous radius of curvature of the edge in contact with snow, i.e. to decrease the radius of curvature of the edge trajectory on snow.

En outre, le décalage angulaire entre le ski et la plate-forme rapproche de la carre interne 5 la direction selon laquelle l'appui du skieur s'applique en direction de la carre inteme.In addition, the angular offset between the ski and the platform brings it closer to the internal edge 5 the direction in which the skier's support is applied in the direction of the inner square.

La figure 3 représente un premier mode de réalisation d'une liaison. Cette liaison comprend un support de liaison 10 placé entre une plate-forme 2 et un ski 1. Le support 10 comprend une platine supérieure 12 qui supporte la plate-forme, et une platine inférieure 13 qui est fixée à la surface supérieure du ski. Les platines présentent chacune une largeur qui est voisine de la largeur du ski.FIG. 3 represents a first embodiment of a connection. This link includes a link support 10 placed between a platform 2 and a ski 1. The support 10 comprises an upper plate 12 which supports the platform, and a lower plate 13 which is fixed to the upper surface of the ski. The turntables each have a width which is close to the width of the ski.

Les platines 12 et 13 sont reliées par un ensemble de deux biellettes 15 et 16, les liaisons étant réalisées autour d'axes d'articulation parallèles à la direction longitudinale définie par le ski. Tout autre mode approprié de liaison pourrait aussi convenir.The plates 12 and 13 are connected by a set of two links 15 and 16, the connections being made around axes of articulation parallel to the direction longitudinal defined by the ski. Any other suitable mode of connection could also suit.

Au repos, c'est-à-dire lorsque les deux platines sont maintenues parallèles et écartées l'une de l'autre, les deux biellettes sont inclinées dans une même direction par rapport à la verticale. En outre, elles ont une longueur différente. Avec la convention que le ski représenté est le ski extérieur au virage, les deux biellettes 15 et 16 sont inclinées de bas en haut et de l'extérieur vers l'intérieur du virage. La biellette 16 située du côté interne au virage est plus courte et plus inclinée par rapport à un plan horizontal que l'autre biellette 15. Cette biellette 16 est la biellette motrice sur laquelle se reporte une grande partie des efforts d'appui du skieur. L'autre ski présente une disposition symétrique.At rest, that is to say when the two plates are kept parallel and separated from each other, the two rods are inclined in the same direction relative to the vertical. In addition, they have a different length. With the convention that the ski represented is the ski outside the bend, the two links 15 and 16 are inclined from bottom to top and from the outside to the inside of the turn. The link 16 located on the internal side of the turn is shorter and more inclined by compared to a horizontal plane than the other link 15. This link 16 is the link drive to which a large part of the support efforts of the skier refers. The other ski has a symmetrical arrangement.

Un moyen de rappel élastique précontraint, tel qu'un bloc 18 élastiquement déformable, ou un ressort, ou autre, est interposé entre les deux platines. Ce bloc 18 rappelle la platine vers sa position haute de repos, où elle est en appui contre une butée 20 située du côté de la biellette 15. Les deux platines et les deux biellettes forment ensemble une structure en quadrilatère déformable contre la force de rappel du bloc précontraint 18. Au moins deux des côtés du quadrilatère ne sont pas parallèles. Ces côtés sont formés en fait par les biellettes.A prestressed elastic return means, such as an elastically block 18 deformable, or a spring, or the like, is interposed between the two plates. This block 18 recalls the plate towards its high rest position, where it bears against a stop 20 located on the side of the link 15. The two plates and the two rods together form a deformable quadrilateral structure against the return force of the pre-stressed block 18. At least two sides of the quadrilateral are not parallel. These sides are actually formed by the rods.

La raideur du bloc 18 est choisie pour que le bloc se comprime et la platine supérieure s'affaisse sous l'effet d'appui du skieur lorsque le ski se trouve dans un virage, dans la position extérieure au virage. Le bloc 18 ramène la platine supérieure en butée dans les autres circonstances.The stiffness of block 18 is chosen so that the block compresses and the plate upper collapses under the support of the skier when the ski is in a corner, in the position outside the corner. Block 18 brings back the stage higher in stop in other circumstances.

La position d'affaissement de la platine supérieure est représentée en figure 4. Dans cette position, du fait de leur différence de longueur, les deux biellettes 15 et 16 ont contraint la platine supérieure à se déplacer par rapport à la platine inférieure selon un mouvement de bascule qui amène la platine inférieure et donc le ski à prendre par rapport à la neige une inclinaison supérieure à celle de la platine supérieure. Egalement, dans ce mouvement de bascule, la platine supérieure 2 s'est déportée du côté de la carre 5 interne au virage.The collapsed position of the upper plate is shown in the figure 4. In this position, due to their difference in length, the two rods 15 and 16 forced the upper plate to move relative to the plate lower according to a rocking movement which brings the lower plate and therefore the ski to take with respect to the snow a slope greater than that of the upper plate. Also, in this rocking movement, the plate upper 2 is offset on the side of the edge 5 internal to the turn.

La figure 5 représente en perspective éclatée le support de liaison 10. On y reconnaít les différentes pièces décrites, les platines 12, 13, les biellettes 15, 16, et les axes de liaison 22, 23, 24, 25 des biellettes aux platines.Figure 5 shows in exploded perspective the connection support 10. There recognizes the different parts described, the plates 12, 13, the links 15, 16, and the connecting axes 22, 23, 24, 25 of the links to the plates.

Les figures 6 et 7 représentent un dispositif interface complet assemblé sur la partie médiane d'un ski.Figures 6 and 7 show a complete interface device assembled on the middle part of a ski.

Le dispositif représenté comprend une plate-forme 2 avec une zone de montage avant 30 où est assemblé un élément de retenue avant 31, et une zone de montage arrière 32 avec un élément de retenue arrière 33. De façon avantageuse, comme les éléments de retenue sont assemblé à une même plate-forme indépendante du ski, les efforts dus au pincement de la chaussure transitent par la plate-forme et non par le ski.The device shown comprises a platform 2 with a zone of front mounting 30 where a front retainer 31 is assembled, and a zone rear mounting 32 with a rear retainer 33. So advantageous, as the retaining elements are assembled on the same platform independent of the ski, the forces due to the pinching of the boot pass through by the platform and not by the ski.

La plate-forme est reliée au ski par quatre supports de liaison 10a, 10b, 10c, 10d qui sont semblables au support 10 précédemment décrit.The platform is connected to the ski by four connecting supports 10a, 10b, 10c, 10d which are similar to the support 10 previously described.

Pour ne pas entraver la flexion du ski, de préférence, un seul support présente un jeu longitudinal limité au jeu de fonctionnement. Ce support est par exemple le support 10c placé au niveau de l'appui arrière de la chaussure. Les autres supports présentent un jeu longitudinal ample. Ce jeu est prévu par exemple au niveau de la liaison entre les biellettes et les platines supérieures.In order not to hamper the bending of the ski, preferably only one support has a longitudinal clearance limited to the operating clearance. This support is by example the support 10c placed at the rear support of the shoe. The other supports have ample longitudinal play. This game is planned for example at the connection between the rods and the upper plates.

Les blocs précontraints qui équipent les différents supports de liaison peuvent avoir ou non la même raideur.The pre-stressed blocks which equip the various connection supports can have the same stiffness or not.

On a obtenu de bons résultats avec une biellette motrice 16 inclinée au repos de 60 degrés par rapport à une direction horizontale définie par la semelle 3 du ski. L'autre biellette est inclinée au repos d'environ de 30 à 50 degrés selon les modèles testés. En virage, l'inclinaison additionnelle de la plate-forme est de l'ordre de 3 à 5 degrés.Good results have been obtained with a driving rod 16 inclined at rest 60 degrees from a horizontal direction defined by the sole 3 of the ski. The other link is inclined at rest by about 30 to 50 degrees depending on the models tested. When cornering, the additional inclination of the platform is around 3 to 5 degrees.

La figure 8 représente une variante de réalisation d'un support de liaison. Pour l'essentiel, le support 35 qui est représenté est semblable au support 10 précédent, avec en particulier les platines supérieure 36 et inférieure 37 reliées par des biellettes.Figure 8 shows an alternative embodiment of a connecting support. For the most part, the support 35 which is represented is similar to the support 10 previous, with in particular the upper 36 and lower 37 plates connected by links.

Une came à balancier 38 est en outre suspendue à un axe 39 porté par la platine supérieure. La came 38 est située du côté de la biellette la plus longue et la plus inclinée, c'est-à-dire vers l'extérieur des skis.A balance cam 38 is further suspended from an axis 39 carried by the upper plate. Cam 38 is located on the side of the longest link and the more inclined, that is to say towards the outside of the skis.

La came d'un support est prévue pour s'escamoter lorsque le ski est en position externe au virage. Ce mode de fonctionnement est illustré dans la figure 9. L'escamotage de la came se fait par gravité, compte tenu de l'angle d'inclinaison du ski extérieur qui est supérieur à l'angle d'équilibre induit par la force centrifuge. De plus, pour faciliter l'escamotage, une partie de la masse de la came est déportée. Le support fonctionne alors de la même façon que ce qui a été décrit précédemment.The support cam is designed to retract when the ski is in position external to the turn. This operating mode is illustrated in Figure 9. The cam is retracted by gravity, taking into account the angle of inclination of the outside ski which is greater than the equilibrium angle induced by the centrifugal force. In addition, to facilitate retraction, part of the mass of the cam is deported. The support then works in the same way as what has been described previously.

La figure 10 montre le même ski en position de ski interne au virage. La came 38 s'oppose alors au déplacement relatif des platines. Dans ces conditions, le dispositif n'est pas actif pour le ski interne au virage.FIG. 10 shows the same ski in the internal ski position at the turn. Drug 38 then opposes the relative movement of the plates. Under these conditions, the device is not active for internal skiing when cornering.

L'inclinaison de la plate-forme peut être facilitée par la flexion du ski lui même. Pour illustrer cela, la figure 11 montre un dispositif semblable à celui des figures 6 et 7. Le dispositif comprend en particulier une plate-forme 54 reliée au ski par quatre supports de liaison 55a, 55b, 55c, 55d. Sous la plaque, déportés latéralement du côté de la biellette la plus longue et la plus inclinée se trouvent deux taquets 57 et 58. Deux leviers 59 et 60 sont en appui sur les taquets, de façon à pouvoir exercer sur eux un effort de traction vers le bas. Les leviers sont articulés en 61, 62 par rapport à une embase assemblée solidairement au ski, et ils sont reliés entre eux par un barreau incompressible 63. En flexion de ski, étant donné que le ski prend une forme d'arc, le barreau 63 force les leviers 59 et 60 à basculer ce qui induit une traction vers le bas sur les taquets de la plate-forme. Cet effet vient s'ajouter à l'effet que le skieur produit lui-même par ses appuis.The inclination of the platform can be facilitated by bending the ski itself even. To illustrate this, Figure 11 shows a device similar to that of Figures 6 and 7. The device comprises in particular a platform 54 connected to the ski by four connecting supports 55a, 55b, 55c, 55d. Under the plate, deported laterally on the side of the longest and most inclined link are two cleats 57 and 58. Two levers 59 and 60 are supported on the cleats, so to be able to exert on them a pulling force downwards. The levers are articulated at 61, 62 with respect to a base assembled integrally with the ski, and they are interconnected by an incompressible bar 63. In ski flexion, given as the ski takes the form of an arc, the bar 63 forces the levers 59 and 60 to tilt which induces a pull down on the cleats of the platform. This effect comes add to the effect that the skier himself produces by his supports.

Naturellement, l'invention n'est pas limitée aux modes de réalisation qui ont été décrits.Naturally, the invention is not limited to the embodiments which have been described.

Par exemple, les platines supérieures et inférieures pourraient être intégrées à la plate-forme ou au ski, respectivement. Les biellettes articulées pourraient être remplacées par des nervures de liaison formées d'une seule pièce avec les platines. Les articulations seraient dans ce cas remplacées par des zones de fléchissement des nervures.For example, the upper and lower plates could be integrated to the platform or to the ski, respectively. The articulated links could be replaced by connecting ribs formed in one piece with the turntables. The joints would in this case be replaced by areas of flexing of the ribs.

Claims (11)

  1. Interface device adapted to be placed between a support platform of a ski boot and a single ski from a pair of skis, the ski defining a longitudinal direction, characterized in that it includes at least one linkage support (10) with an upper plate (12) and a lower plate (13), the plates being close in width and connected together by two connecting rods (15, 16) or ribbing slanted in the same direction and non-parallel, so as to make in cross-section a deformable quadrilateral structure with at least two sides that are non-parallel.
  2. Device according to claim 1, characterized in that a prestressed block of elastically deformable material (18) is inserted between the two plates.
  3. Device according to claim 2, characterized in that it has an abutment (20) integral with the lower plate (13) against which the prestressed element returns the upper plate (12) into a position of rest where it is parallel to the lower plate (13).
  4. Device according to any of claims 1 or 2, characterized in that one of the connecting rods (16), called a driving connecting rod, is slanted at about 60° at rest with respect to the surface defined by the lower plate.
  5. Device according to claim 4, characterized in that the other connecting rod has a slanting between 30-50° at rest.
  6. Device according to any of the preceding claims, characterized in that it has a rocking cam (38) suspended to an axis borne by the upper plate (12).
  7. Assembly for retaining a boot on a single ski from a pair of skis, the assembly including a platform (2) provided to support the boot, characterized in that it has an interface device according to any of the preceding claims.
  8. Assembly according to claim 7, characterized in that the platform rests on at least one support (10a, 10b, 10c, 10d).
  9. Assembly according to claim 8, characterized in that it has four supports (10, 10b, 10c, 10d) spaced along the length of the platform.
  10. Assembly according to claim 8, characterized in that the platform (54) has, on its lower surface, two stoppers (57, 58) engaged with two rockers (59, 60), connected to one another by an incompressible bar (63).
  11. Ski from a pair of skis for alpine skiing, characterized in that it has an interface device according to any of claims 1-7.
EP98106462A 1997-04-16 1998-04-08 Interface between ski boot support plate and ski Expired - Lifetime EP0872264B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9704861A FR2762222B1 (en) 1997-04-16 1997-04-16 AVAILABLE INTERFACE BETWEEN A SHOE AND A SNOWBOARD, ESPECIALLY A SKI
FR9704861 1997-04-16

Publications (2)

Publication Number Publication Date
EP0872264A1 EP0872264A1 (en) 1998-10-21
EP0872264B1 true EP0872264B1 (en) 2002-02-06

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Application Number Title Priority Date Filing Date
EP98106462A Expired - Lifetime EP0872264B1 (en) 1997-04-16 1998-04-08 Interface between ski boot support plate and ski

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EP (1) EP0872264B1 (en)
AT (1) ATE212872T1 (en)
DE (1) DE69803714T2 (en)
FR (1) FR2762222B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH489251A (en) * 1969-08-06 1970-04-30 Zander Hubert Device for adjusting a ski binding
DE2255406A1 (en) * 1972-11-11 1974-05-16 Wolf Dieter Hellmann DEVICE FOR ASSIGNING THE FOOTREST AREA TO SKI
FR2711321B1 (en) 1993-10-20 1995-12-08 Salomon Sa Ski provided with a device intended to reduce the pressure of the ends of the ski on the snow following the support of the skier on the ski.
US5558354A (en) * 1995-02-23 1996-09-24 Lion; Ronald K. Combination skis and mounting plate assembly

Also Published As

Publication number Publication date
DE69803714T2 (en) 2002-08-14
FR2762222B1 (en) 1999-06-04
EP0872264A1 (en) 1998-10-21
FR2762222A1 (en) 1998-10-23
DE69803714D1 (en) 2002-03-21
ATE212872T1 (en) 2002-02-15

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