EP3037141B1 - Snowboard with complex sidewalls - Google Patents

Snowboard with complex sidewalls Download PDF

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Publication number
EP3037141B1
EP3037141B1 EP15201420.5A EP15201420A EP3037141B1 EP 3037141 B1 EP3037141 B1 EP 3037141B1 EP 15201420 A EP15201420 A EP 15201420A EP 3037141 B1 EP3037141 B1 EP 3037141B1
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EP
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Prior art keywords
snowboard
fact
accordance
assembly
layer
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EP15201420.5A
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German (de)
French (fr)
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EP3037141A1 (en
Inventor
Nicolas Puget
Jean-Luc Dutaut
Pierre Billon
Johan Vailli
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Skis Rossignol SA
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Skis Rossignol SA
Rossignol SA
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Publication of EP3037141A1 publication Critical patent/EP3037141A1/en
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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
    • A63C5/0434—Structure of the surface thereof of the side walls

Definitions

  • the invention relates to the field of snow sliding sports, and more specifically that of alpine skiing or snowboarding, snowboard simultaneously receiving both feet of the user. It relates more particularly to a new gliding board structure, as regards the constitution of side edges. It aims in particular to confer a particular behavior with regard to the transmission of forces on the edge, when tilting the inclination of the board during the turning phases.
  • an alpine ski has a structure that includes a lower assembly, formed of the edge edged edge, generally associated with one or more mechanical reinforcement layers.
  • the ski also comprises an upper assembly, which also includes at least one mechanical reinforcing layer, and which is separated from the lower assembly by a core which allows to move the lower and upper reinforcing layers of the neutral fiber.
  • the ski also has lateral elements forming the edges, whose role is to protect the core from external aggression, and to allow the transmission of the supports from the upper face, and in particular from the reinforcements. to the edges.
  • this board is characterized in that at least one of the edges consists of three elements, namely an internal element, an intermediate element, and an external element. More specifically, the intermediate element consists of an elastomeric material, the inner element has a compressive stiffness greater than the compression stiffness of the outer element.
  • the invention consists in using songs that are composed by the assembly of three distinct elements, each having a specific role in the transmission of supports to the edge.
  • the inner element of the song which has the highest rigidity in compression makes it possible to ensure the transmission supports from the upper layer and in particular from the upper reinforcement, to the edges, and more precisely to the level of the fins and edges.
  • the intermediate element, elastomeric base acts as a buffer due to the fact that the outer member has a lower compression stiffness, allowing the faster deformation of the outer member relative to the inner member some singing.
  • the vertical shear induced within the elastomeric intermediate member dissipates energy to create the damping effect, and thereby generate a suspension type connection between the upper reinforcement and the edge.
  • this suspension effect is all the more marked as the difference between the compression stiffnesses of the inner and outer elements is important.
  • the compression stiffness is calculated as the product of the Young's modulus by the average thickness of the element concerned.
  • the Young's modulus in compression of the internal element of the edge may advantageously be greater than 15 GPa, preferably greater than 30 GPa, while the Young's modulus of the external element must be smaller than 11 GPA, preferably less than 2 GPa.
  • the intermediate element has a particularly low Young's modulus, as well as a Shore hardness of less than 80 Shore A, and preferably of between 60 and 80 Shore A. It can for example be act of rubber-like materials, natural or synthetic, or of thermoplastic elastomers of the SEBS type.
  • the layer of Elastomeric material forming the inner member may extend vertically over the entire height of the edge, between the upper reinforcement and the lower reinforcement.
  • this elastomeric intermediate element may be present on all or part of the total length of the edge, and in particular be present on the fraction of the edge extending in the zone of the pad to the spatula, corresponding to the zone in which the most important efforts are transmitted on the edge, and where the attachment of the ski on the snow is essential.
  • the internal element of the edge may ensure direct transmission of the forces between the upper reinforcement and the lower reinforcement.
  • the base of the inner element is located above the edge of the edge while the upper part of this inner element of the edge is in contact with the layer or layers of upper reinforcements.
  • the external element of the song has recessed shapes, with recesses material.
  • this external element can be made of a transparent material.
  • the outer element of the edge can incorporate a decorative layer, advantageously protected from the outside, especially if this element is transparent and the decorative pattern has been made on its inner face.
  • the board has an elastomeric layer interposed between the core and the assembly higher and / or lower.
  • this elastomeric layer forms with the intermediate elements of the songs a kind of partial or total envelope of the core.
  • the board may comprise an elastomeric layer interposed between the core and the upper and / or lower face of the lateral element of the outer edge.
  • an elastomeric layer which laterally extends the elastomeric layer formed by the intermediate element of the edge.
  • FIG 1 illustrates a ski structure according to the invention, in which many elements are common to the different embodiments of the other figures, and will therefore only be described in detail only once.
  • this ski of "sandwich” structure, comprises a lower assembly 2 including a sliding week 6, bordered by edges 3.
  • the cords 4 of the edges 3 are located in the lateral extension of the sole 6, and are extended by fins 5, which rests on the sole 6, inside the structure to increase the mechanical anchoring of the edge.
  • the lower assembly 2 also comprises a first reinforcement 7 disposed above the soleplate, and which extends laterally to the fins 5 of the edges 3.
  • the upper assembly also comprises a second reinforcing layer 8, which is extends to the side faces of the board.
  • the ski also comprises an upper assembly 10 which includes an upper protective and decorative layer 11, resting on three layers of mechanical reinforcements 12, 13, 14. The upper assembly 10 is separated from the lower assembly by means of the core 9.
  • This core may be made of a relatively light material, such as wood or polyurethane foam, for the purpose of spreading the upper and lower assemblies, and in particular the reinforcing layers with respect to the neutral fiber, for to obtain the flexural rigidity necessary for skiing.
  • the thickness of the core is variable along the length of the ski.
  • the core is bordered by edges 20, laterally separating the core 9 from the outside, and interposed vertically between the upper assembly 10 and the lower assembly 2.
  • this edge 20 is composed of three distinct elements.
  • a first element 21 or external element forms the visible lateral face of the ski.
  • the inner member 23 has its inner face in contact with the core 9 and has its base 25 in contact with the lower assembly 2, and its upper end 24 in contact with the upper assembly 10.
  • the intermediate member 22 typically made of an elastomeric material and in particular rubber.
  • the internal 23 and outer 21 elements of the edge have distinct mechanical properties, in that the inner member 23 has a compression stiffness significantly greater than that of the outer member 21.
  • the inner element can be made by an aluminum plate, whose Young's modulus is 70 GPa, a thickness of the order of a millimeter or less, giving a compressive rigidity greater than 70000 N / mm.
  • the inner member 23 may also be made based on a superposition of papers impregnated with a phenolic resin, whose Young's modulus is close to 18 GPa.
  • the thickness of the inner element is of the order of several millimeters, typically between 3 and 5 mm, inducing a compressive rigidity of the order of 50000 to 90000 N / mm.
  • Other materials, adapted in thickness, can be chosen respecting the resistance value in high compression, between 50000 and 90000 N / mm.
  • the outer element of the edge has a significantly lower compression stiffness.
  • This external element 21 may be made for example based on a superposition of papers impregnated with a melamine resin, which has a Young's mode of the order of 10 GPa, with a thickness of the order of 1 to 3 mm.
  • the compressive rigidity is between 10,000 and 30000 N / mm. It may also be an acrylo-butadiene-styrene ABS material, whose Young's modulus is close to 2 GPa, which has a thickness of several millimeters, of the order of 2 to 5 mm, giving a rigidity of the order of 4000 and 10000 N / mm.
  • the thickness is chosen as a function of the geometry of the board, in particular the existence or not of inclined faces at the level of the edges, and the desired value of compressive rigidity.
  • Other materials adapted in thickness can be chosen with a compressive strength of between 4000 and 30000 N / mm.
  • the intermediate element 22 is for its part made typically based on rubber, and has a thickness of a few tenths of millimeters and a few millimeters, typically close to 0.5 mm.
  • the three elements are glued together before or during molding.
  • the external element of lower compression stiffness is thus coupled to the rubber intermediate element forming the damper.
  • the external and intermediate element are respectively equivalent to a stiffness and a shock absorber connected in parallel.
  • the damper only plays its role when the stiffness is low. All of these two elements form the suspension of the edge relative to the rest of the structure.
  • the configuration illustrated in figure 3 comprises two additional layers 45, 46 of an elastomeric material, typically based on rubber, of a very fine thickness, of a few tenths of a millimeter, typically of 0.18 mm.
  • the layers 45 and 46 respectively extend above the core over the entire width thereof, and interrupt with it without passing either above or below the inner member 43. of singing 40.
  • the elastomeric layers 55, 56 interposed between the core and the upper assembly 10 and the lower assembly 2 extend laterally to above and below the inner element 53 of the edge 50.
  • the board comprises an elastomeric layer, interposed between the core 9 and the upper assembly 10. More specifically, this layer 65 extends laterally to come into contact with the intermediate element 62 of the edge 60.
  • the board comprises two rubber strips 66, 76, interposed between the underside of the external element of the edge 60 and the lower assembly 2. These strips 66, 67 come into contact with the intermediate element 62 of the edge 60.
  • FIG. 6 A similar structure is illustrated in figure 6 .
  • This structure comprises a typically elastomeric layer 75, interposed between the core 9 and the lower assembly 2.
  • This elastomeric layer extends laterally to the level of the intermediate elements 72 of the edge 70, also elastomeric.
  • the board also comprises two elastomeric strips 76, 77 disposed on the upper face of the outer member 71 of the edges 70.
  • each of the internal or external elements can be achieved by the assembly of vertical elementary layers, respecting the ratios between the compressive stiffnesses of the two global elements, calculated as the sum of the stiffnesses of each elementary layer.
  • the elastomeric material of the intermediate member may exhibit viscoelastic properties in the temperature range of -20 ° C and 10 ° C to improve the damping phenomenon.
  • the gliding board according to the invention has multiple advantages, in particular that of ensuring both a good transmission of efforts from the top of the board to the edge, by the intermediate of the inner member of the singularly rigid, while adding a suspension formed by all of the outer member and the intermediate member. Therefore, it is easier for the user to control his trajectory, to increase the resistance of the board on the curve, the latter being more stable, because the suspension partly filters the vibrations induced by the geometry of the terrain. .
  • the gliding board is thus more efficient for evolution in competition, because it thus provides a feeling of comfort in the turning phases.

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  • Laminated Bodies (AREA)

Description

Domaine techniqueTechnical area

L'invention se rattache au domaine des sports de glisse sur neige, et plus spécifiquement celui du ski alpin ou du surf des neiges, planche de glisse recevant simultanément les deux pieds de l'utilisateur. Elle concerne plus particulièrement une nouvelle structure de planche de glisse, en ce qui concerne la constitution des chants latéraux. Elle vise notamment à conférer un comportement particulier en ce qui concerne la transmission des efforts sur la carre, lors du basculement de l'inclinaison de la planche pendant les phases de virage.The invention relates to the field of snow sliding sports, and more specifically that of alpine skiing or snowboarding, snowboard simultaneously receiving both feet of the user. It relates more particularly to a new gliding board structure, as regards the constitution of side edges. It aims in particular to confer a particular behavior with regard to the transmission of forces on the edge, when tilting the inclination of the board during the turning phases.

Arrière-plan de l'inventionBackground of the invention

De façon générale, un ski alpin présente une structure qui comporte un ensemble inférieur, formé de la semelle bordée de carres, généralement associée à une ou plusieurs couches de renfort mécaniques. Le ski comporte aussi un ensemble supérieur, qui inclut également au moins une couche de renfort mécanique, et qui est séparé de l'ensemble inférieur par un noyau qui permet d'éloigner les couches de renforts inférieur et supérieur de la fibre neutre.In general, an alpine ski has a structure that includes a lower assembly, formed of the edge edged edge, generally associated with one or more mechanical reinforcement layers. The ski also comprises an upper assembly, which also includes at least one mechanical reinforcing layer, and which is separated from the lower assembly by a core which allows to move the lower and upper reinforcing layers of the neutral fiber.

Dans les structures de type « sandwich », le ski comporte également des éléments latéraux formant les chants, qui ont pour rôle de protéger le noyau des agressions extérieures, et de permettre la transmission des appuis depuis la face supérieure, et en particulier depuis les renforts supérieurs jusqu'aux carres.In sandwich-type structures, the ski also has lateral elements forming the edges, whose role is to protect the core from external aggression, and to allow the transmission of the supports from the upper face, and in particular from the reinforcements. to the edges.

On a déjà proposé de réaliser les chants à partir de plusieurs éléments assemblés parallèlement dans le sens vertical. Ainsi, le Demandeur a décrit dans le document EP 0 180 678 un ski dont les chants sont réalisés par l'assemblage de plusieurs couches de matériaux de natures différentes, dont certaines apparaissent sur la face supérieure, permettant ainsi de protéger les arêtes supérieures de la face supérieure. La publication EP 0850785 A1 , divulgue également une planche de glisse sur neige avec des chants constitué d'au moins trois éléments, les chants étant constitués par le prolongement en descente latéralement sur le noyau de l'ensemble supérieur.It has already been proposed to make the songs from several elements assembled parallel in the vertical direction. So, the Applicant described in the document EP 0 180 678 a ski whose edges are made by assembling several layers of materials of different types, some of which appear on the upper face, thus protecting the upper edges of the upper face. The publication EP 0850785 A1 also discloses a gliding board on snow with songs consisting of at least three elements, the songs being constituted by the extension downwardly laterally on the core of the upper assembly.

Par ailleurs, on a décrit dans le document AT 388 875 , un chant particulier, qui comporte sur sa face interne une couche en un matériau polymérique, et en particulier élastomérique en contact avec le noyau du ski. Cette structure permet de donner de la mobilité mécanique au chant par rapport au noyau. Elle présente l'inconvénient de diminuer l'intensité des efforts transmis à la carre, et de dégrader le comportement du ski.Moreover, it was described in the document AT 388 875 , a particular song, which has on its inner face a layer of a polymeric material, and in particular elastomeric in contact with the core of the ski. This structure makes it possible to give mechanical mobility to the song with respect to the nucleus. It has the disadvantage of reducing the intensity of the forces transmitted to the edge, and degrade the behavior of the ski.

Exposé de l'inventionPresentation of the invention

Un des objectifs de l'invention et d'améliorer le comportement de la planche de glisse en virage ou plus généralement lorsque la planche est inclinée, en particulier d'optimiser la transmission des efforts au niveau des carres.
Pour ce faire, il est proposé une planche de glisse sur neige présentant une structure interne comportant :

  • un ensemble inférieur comprenant une semelle bordée de carres et au moins un renfort inférieur,
  • un ensemble supérieur incluant au moins un renfort supérieur,
  • un noyau séparant ces ensembles inférieurs et supérieurs,
  • des chants rapportés sur les côtés latéraux du noyau et recouverts par l'ensemble supérieur, ces chants étant interposés verticalement entre l'ensemble supérieur et l'ensemble inférieur, ces chants étant constitués de plusieurs éléments solidarisés entre eux et positionnés sensiblement verticalement.
One of the objectives of the invention and to improve the behavior of the gliding board in turns or more generally when the board is inclined, in particular to optimize the transmission of efforts at the edges.
To do this, it is proposed a snow sliding board having an internal structure comprising:
  • a lower assembly comprising a sole edged with edges and at least one lower reinforcement,
  • an upper assembly including at least one upper reinforcement,
  • a core separating these lower and higher sets,
  • edges added to the lateral sides of the core and covered by the upper assembly, these edges being interposed vertically between the upper and lower assemblies, these edges consisting of several elements joined together and positioned substantially vertically.

Conformément à l'invention, cette planche se caractérise en ce que au moins l'un des chants est constitué de trois éléments, à savoir un élément interne, un élément intermédiaire, et un élément externe. Plus précisément, l'élément intermédiaire est constitué d'un matériau élastomérique, l'élément interne présente une rigidité en compression supérieure à la rigidité en compression de l'élément externe.According to the invention, this board is characterized in that at least one of the edges consists of three elements, namely an internal element, an intermediate element, and an external element. More specifically, the intermediate element consists of an elastomeric material, the inner element has a compressive stiffness greater than the compression stiffness of the outer element.

Autrement dit, l'invention consiste à utiliser des chants qui sont composés par l'assemblage de trois éléments distincts, ayant chacun un rôle spécifique dans la transmission des appuis à destination de la carre. Ainsi, l'élément interne du chant, qui présente la plus forte rigidité en compression permet d'assurer la transmission des appuis depuis la couche supérieure et en particulier depuis le renfort supérieur, à destination des carres, et plus précisément au niveau des ailettes et des carres.In other words, the invention consists in using songs that are composed by the assembly of three distinct elements, each having a specific role in the transmission of supports to the edge. Thus, the inner element of the song, which has the highest rigidity in compression makes it possible to ensure the transmission supports from the upper layer and in particular from the upper reinforcement, to the edges, and more precisely to the level of the fins and edges.

Complémentairement, l'élément intermédiaire, à base élastomérique joue un rôle d'amortisseur grâce au fait que l'élément externe présente une raideur en compression plus faible, permettant ainsi la déformation plus rapide de l'élément externe par rapport à l'élément interne du chant. Le cisaillement vertical induit à l'intérieur de l'élément intermédiaire élastomérique permet de dissiper de l'énergie pour créer l'effet d'amortissement, et ainsi générer une liaison de type de suspension entre le renfort supérieur et la carre.Complementarily, the intermediate element, elastomeric base acts as a buffer due to the fact that the outer member has a lower compression stiffness, allowing the faster deformation of the outer member relative to the inner member some singing. The vertical shear induced within the elastomeric intermediate member dissipates energy to create the damping effect, and thereby generate a suspension type connection between the upper reinforcement and the edge.

En pratique, cet effet de suspension est d'autant plus marqué que l'écart entre les rigidités en compression des éléments interne et externe est important. On rappelle que la rigidité en compression est calculée comme le produit du module d'Young par l'épaisseur moyenne de l'élément concerné. Ainsi, on considère que le module d'Young en compression de l'élément interne du chant peut avantageusement être supérieur à 15 GPa, de préférence supérieure à 30 GPa tandis que le module d'Young de l'élément externe doit être lui inférieur à 11 GPA, de préférence inférieur à 2 GPa.In practice, this suspension effect is all the more marked as the difference between the compression stiffnesses of the inner and outer elements is important. It is recalled that the compression stiffness is calculated as the product of the Young's modulus by the average thickness of the element concerned. Thus, it is considered that the Young's modulus in compression of the internal element of the edge may advantageously be greater than 15 GPa, preferably greater than 30 GPa, while the Young's modulus of the external element must be smaller than 11 GPA, preferably less than 2 GPa.

On obtient ainsi de bons résultats en utilisant en tant qu'élément interne un matériau métallique, typiquement à base d'aluminium, et pour l'élément externe un matériau polymérique, par exemple type acrylo-butadiène-styrène (ABS). A l'inverse, l'élément intermédiaire, de type élastomérique présente un module d'Young particulièrement faible, ainsi qu'une dureté Shore inférieure à 80 Shore A, et de préférence comprise entre 60 et 80 Shore A. Il peut par exemple s'agir de matériaux de type caoutchoucs, naturel ou synthétique, ou d'élastomères thermoplastiques du type SEBS.Good results are thus obtained by using, as internal element, a metallic material, typically based on aluminum, and for the external element a polymeric material, for example of the acrylo-butadiene-styrene (ABS) type. On the other hand, the intermediate element, of elastomer type, has a particularly low Young's modulus, as well as a Shore hardness of less than 80 Shore A, and preferably of between 60 and 80 Shore A. It can for example be act of rubber-like materials, natural or synthetic, or of thermoplastic elastomers of the SEBS type.

En pratiques différentes variantes peuvent être envisagées en ce qui concerne la géométrie et le positionnement des chants caractéristiques. Ainsi, la couche de matériau élastomérique formant l'élément interne peut s'étendre verticalement sur toute la hauteur du chant, entre le renfort supérieur et le renfort inférieur. De même, cet élément intermédiaire élastomérique peut être présent sur tout ou partie de la longueur totale du chant, et en particulier être présent sur la fraction du chant s'étendant dans la zone du patin jusqu'à la spatule, correspondant à la zone dans laquelle les efforts les plus importants sont transmis sur la carre, et où l'accrochage du ski sur la neige est primordial.In practice, different variants can be envisaged with regard to the geometry and positioning of the characteristic edges. Thus, the layer of Elastomeric material forming the inner member may extend vertically over the entire height of the edge, between the upper reinforcement and the lower reinforcement. Similarly, this elastomeric intermediate element may be present on all or part of the total length of the edge, and in particular be present on the fraction of the edge extending in the zone of the pad to the spatula, corresponding to the zone in which the most important efforts are transmitted on the edge, and where the attachment of the ski on the snow is essential.

En pratique, il peut être avantageux que l'élément interne du chant assure une transmission directe des efforts entre le renfort supérieur le renfort inférieur. Dans ce cas, la base de l'élément interne est située au-dessus de l'arête de la carre tandis que la partie supérieure de cet élément interne du chant est au contact de la ou des couches de renforts supérieurs.In practice, it may be advantageous for the internal element of the edge to ensure direct transmission of the forces between the upper reinforcement and the lower reinforcement. In this case, the base of the inner element is located above the edge of the edge while the upper part of this inner element of the edge is in contact with the layer or layers of upper reinforcements.

Pour augmenter l'écart de rigidité en compression entre les éléments interne et externe du chant, on peut prévoir que l'élément externe du chant présente des formes en creux, avec des évidements de matière. Dans un souci esthétique, cet élément externe peut être réalisé en un matériau transparent.To increase the compression stiffness gap between the inner and outer elements of the edge, it can be expected that the external element of the song has recessed shapes, with recesses material. For aesthetic reasons, this external element can be made of a transparent material.

En pratique, il est également possible de concevoir l'élément externe du chant en le réalisant en plusieurs éléments juxtaposés sur la longueur du ski, de manière à ajuster les rigidités en compression de chacune des portions.In practice, it is also possible to design the outer element of the song by making it into several elements juxtaposed along the length of the ski, so as to adjust the compression stiffness of each of the portions.

Toujours dans un but esthétique, l'élément externe du chant peut intégrer une couche de décoration, avantageusement protégée de l'extérieur en particulier si cet élément est transparent et que le motif de décoration été réalisé sur sa face intérieure.Still for aesthetic purposes, the outer element of the edge can incorporate a decorative layer, advantageously protected from the outside, especially if this element is transparent and the decorative pattern has been made on its inner face.

A cet effet de suspension peut être ajouté un effet d'amortissement de la structure en flexion dans certaines configurations. Ainsi, on peut prévoir que la planche comporte une couche élastomérique interposée entre le noyau et l'ensemble supérieur et/ou inférieur. Dans ce cas, cette couche élastomérique forme avec les éléments intermédiaires des chants une sorte de d'enveloppe partielle ou totale du noyau.For this purpose of suspension can be added a damping effect of the flexural structure in certain configurations. Thus, it can be expected that the board has an elastomeric layer interposed between the core and the assembly higher and / or lower. In this case, this elastomeric layer forms with the intermediate elements of the songs a kind of partial or total envelope of the core.

Dans une variante de réalisation, la planche peut comporter une couche élastomérique interposée entre le noyau et la face supérieure et/ou inférieure de l'élément latéral du chant externe. Autrement dit, on prévoit une couche élastomérique qui prolonge latéralement la couche élastomérique formée par l'élément intermédiaire du chant.In an alternative embodiment, the board may comprise an elastomeric layer interposed between the core and the upper and / or lower face of the lateral element of the outer edge. In other words, there is provided an elastomeric layer which laterally extends the elastomeric layer formed by the intermediate element of the edge.

Description sommaire des figuresBrief description of the figures

La manière de réaliser l'invention, ainsi que les avantages qui en découlent, ressortiront bien de la description des modes de réalisations qui suivent, à l'appui des figures annexées dans lesquelles les figures 1 à 6 sont des vues en coupe transversale de ski conformément à six variantes de réalisation.The manner of carrying out the invention, as well as the advantages derived therefrom, will emerge clearly from the description of the embodiments which follow, in support of the appended figures in which the Figures 1 to 6 are cross-section views of ski according to six embodiments.

Description détailléedetailed description

La figure 1 illustre une structure de ski conforme à l'invention, dans laquelle de nombreux éléments sont communs aux différents modes de réalisation des autres figures, et ne seront donc que décrits en détail qu'une seule fois.The figure 1 illustrates a ski structure according to the invention, in which many elements are common to the different embodiments of the other figures, and will therefore only be described in detail only once.

Ainsi, ce ski 1, de structure « sandwich », comporte un ensemble inférieur 2 incluant une semaine de glisse 6, bordée de carres 3. Les cordons 4 des carres 3 se situent dans le prolongement latéral de la semelle 6, et sont prolongés par des ailettes 5, qui repose sur la semelle 6, à l'intérieur de la structure pour augmenter l'ancrage mécanique de la carre. L'ensemble inférieur 2 comporte également un premier renfort 7 disposé au-dessus de la semelle, et qui s'étend latéralement jusqu'aux ailettes 5 des carres 3. L'ensemble supérieur comporte également une seconde couche de renfort 8, qui s'étend jusqu'aux faces latérales de la planche. Le ski comporte également un ensemble supérieur 10 qui inclut une couche supérieure de protection et de décoration 11, reposant sur trois couches de renforts mécaniques 12, 13, 14. L'ensemble supérieur 10 est séparé de l'ensemble inférieur par l'intermédiaire du noyau 9. Ce noyau peut être réalisé en un matériau relativement léger, tel du bois ou une mousse de polyuréthane, dans le but d'écarter les ensembles supérieur et inférieur, et en particulier les couches de renforts par rapport à la fibre neutre, pour obtenir la rigidité en flexion nécessaire pour le ski. De façon connue, l'épaisseur du noyau est variable sur la longueur du ski.Thus, this ski 1, of "sandwich" structure, comprises a lower assembly 2 including a sliding week 6, bordered by edges 3. The cords 4 of the edges 3 are located in the lateral extension of the sole 6, and are extended by fins 5, which rests on the sole 6, inside the structure to increase the mechanical anchoring of the edge. The lower assembly 2 also comprises a first reinforcement 7 disposed above the soleplate, and which extends laterally to the fins 5 of the edges 3. The upper assembly also comprises a second reinforcing layer 8, which is extends to the side faces of the board. The ski also comprises an upper assembly 10 which includes an upper protective and decorative layer 11, resting on three layers of mechanical reinforcements 12, 13, 14. The upper assembly 10 is separated from the lower assembly by means of the core 9. This core may be made of a relatively light material, such as wood or polyurethane foam, for the purpose of spreading the upper and lower assemblies, and in particular the reinforcing layers with respect to the neutral fiber, for to obtain the flexural rigidity necessary for skiing. In known manner, the thickness of the core is variable along the length of the ski.

Latéralement, le noyau est bordé par des chants 20, séparant latéralement le noyau 9 de l'extérieur, et interposés verticalement entre l'ensemble supérieur 10 et l'ensemble inférieur 2. Laterally, the core is bordered by edges 20, laterally separating the core 9 from the outside, and interposed vertically between the upper assembly 10 and the lower assembly 2.

Conformément à l'invention, ce chant 20 est composé de trois éléments distincts. Un premier élément 21 ou élément externe forme la face latérale visible du ski. L'élément interne 23 présente sa face intérieure au contact du noyau 9 et possède sa base 25 au contact de l'ensemble inférieur 2, et son extrémité haute 24 au contact de l'ensemble supérieur 10. Entre l'élément externe 21 et l'élément interne 23 se trouve l'élément intermédiaire 22 typiquement réalisé à base d'un matériau élastomérique et en particulier en caoutchouc.According to the invention, this edge 20 is composed of three distinct elements. A first element 21 or external element forms the visible lateral face of the ski. The inner member 23 has its inner face in contact with the core 9 and has its base 25 in contact with the lower assembly 2, and its upper end 24 in contact with the upper assembly 10. Between the outer member 21 and the internal member 23 is the intermediate member 22 typically made of an elastomeric material and in particular rubber.

Comme déjà évoqué, les éléments interne 23 et externe 21 du chant présentent des propriétés mécaniques distinctes, en ce sens que l'élément interne 23 possède une rigidité à la compression nettement supérieure à celle de l'élément externe 21. Plus précisément, dans un mode de réalisation particulier, l'élément interne peut être réalisé par une plaque d'aluminium, dont le module d'Young est de 70 GPa, d'une épaisseur de l'ordre du millimètre ou inférieur, donnant une rigidité en compression supérieure à 70000 N/mm. L'élément interne 23 peut également être réalisé à base d'une superposition de papiers imprégnés d'une résine phénolique, dont le module d'Young est voisin de 18 GPa. Dans ce dernier cas, l'épaisseur de l'élément interne est de l'ordre de plusieurs millimètres, typiquement entre 3 et 5 mm, induisant une rigidité en compression de l'ordre de 50000 à 90000 N/mm . D'autres matériaux, adaptés en épaisseur, peuvent être choisis en respectant la valeur de résistance en compression élevée, comprise entre 50000 et 90000 N/mm.As already mentioned, the internal 23 and outer 21 elements of the edge have distinct mechanical properties, in that the inner member 23 has a compression stiffness significantly greater than that of the outer member 21. More specifically, in a particular embodiment, the inner element can be made by an aluminum plate, whose Young's modulus is 70 GPa, a thickness of the order of a millimeter or less, giving a compressive rigidity greater than 70000 N / mm. The inner member 23 may also be made based on a superposition of papers impregnated with a phenolic resin, whose Young's modulus is close to 18 GPa. In the latter case, the thickness of the inner element is of the order of several millimeters, typically between 3 and 5 mm, inducing a compressive rigidity of the order of 50000 to 90000 N / mm. Other materials, adapted in thickness, can be chosen respecting the resistance value in high compression, between 50000 and 90000 N / mm.

Complémentairement, l'élément externe du chant présente une rigidité en compression nettement inférieure. Cet élément externe 21 peut être réalisé par exemple à base d'une superposition de papiers imprégnés d'une résine mélamine, qui possède un mode d'Young de l'ordre de 10 GPa, avec une épaisseur de l'ordre de 1 à 3 mm. La rigidité en compression est comprise entre 10000 et 30000 N/mm. Il peut également s'agir d'un matériau de type acrylo-butadiène-styrène ABS, dont le module d'Young est voisin de 2 GPa, qui présente une épaisseur de plusieurs millimètres, de l'ordre de 2 à 5 mm, donnant une rigidité de l'ordre de 4000 et 10000 N/mm. L'épaisseur est choisie en fonction de la géométrie de la planche, en particulier de l'existence ou non de pans inclinés au niveau des chants, et de la valeur de rigidité en compression recherchée. Bien entendu, d'autres matériaux adaptés en épaisseur peuvent être choisis avec une résistance en compression comprise entre 4000 et 30000 N/mm.Complementarily, the outer element of the edge has a significantly lower compression stiffness. This external element 21 may be made for example based on a superposition of papers impregnated with a melamine resin, which has a Young's mode of the order of 10 GPa, with a thickness of the order of 1 to 3 mm. The compressive rigidity is between 10,000 and 30000 N / mm. It may also be an acrylo-butadiene-styrene ABS material, whose Young's modulus is close to 2 GPa, which has a thickness of several millimeters, of the order of 2 to 5 mm, giving a rigidity of the order of 4000 and 10000 N / mm. The thickness is chosen as a function of the geometry of the board, in particular the existence or not of inclined faces at the level of the edges, and the desired value of compressive rigidity. Of course, other materials adapted in thickness can be chosen with a compressive strength of between 4000 and 30000 N / mm.

L'élément intermédiaire 22 est quant à lui réalisé typiquement à base de caoutchouc, et présente une épaisseur de quelques dixièmes de millimètres et quelques millimètres, typiquement voisin de 0,5 mm. Les trois éléments sont collés entre eux avant ou pendant le moulage.The intermediate element 22 is for its part made typically based on rubber, and has a thickness of a few tenths of millimeters and a few millimeters, typically close to 0.5 mm. The three elements are glued together before or during molding.

L'élément externe de rigidité en compression plus faible est donc couplé à l'élément intermédiaire en caoutchouc formant l'amortisseur. L'élément externe et intermédiaire sont équivalents respectivement à une raideur et à un amortisseur montés en parallèle. L'amortisseur ne joue son rôle que lorsque la raideur est faible. L'ensemble de ces deux éléments forme la suspension de la carre par rapport au reste de la structure.The external element of lower compression stiffness is thus coupled to the rubber intermediate element forming the damper. The external and intermediate element are respectively equivalent to a stiffness and a shock absorber connected in parallel. The damper only plays its role when the stiffness is low. All of these two elements form the suspension of the edge relative to the rest of the structure.

Dans la forme illustrée aux figures 2 à 6, les chants latéraux ne sont pas biseautés, pour faciliter les calculs de rigidité en compression. Dans le cas de la figure 2, et l'élément externe 31 du chant 30 présente une face externe plane et verticale. Cet élément externe 30 est en comparaison plus épais que celui de la figure 1, Toutefois, en pratique l'élément externe est le plus souvent biseauté, et le calcul de la rigidité se fait avec l'épaisseur moyenne. Dans le même ordre d'idée, l'élément interne 33 du chant 30, à base d'une superposition de papiers imprégnés d'une résine phénolique est plus épais sur la figure 2 que l'élément analogue métallique de la figure 1.In the form illustrated in Figures 2 to 6 , side edges are not beveled, to facilitate compaction stiffness calculations. In the case of figure 2 , and the outer member 31 of the edge 30 has a planar and vertical outer face. This external element 30 is in comparison thicker than that of the figure 1 However, in practice the outer element is most often beveled, and the calculation of the stiffness is done with the average thickness. In the same vein, the inner element 33 of the edge 30, based on a superposition of papers impregnated with a phenolic resin is thicker on the figure 2 that the analogous metal element of the figure 1 .

La configuration illustrée à la figure 3, comporte deux couches supplémentaires 45,46 d'un matériau élastomérique, typiquement à base de caoutchouc, d'une épaisseur très fine, de quelques dixièmes de millimètres, typiquement de 0,18 mm. Dans ce mode de réalisation, les couches 45 et 46 s'étendent respectivement au-dessus du noyau sur toute la largeur de celui-ci, et s'interrompent avec lui sans passer ni au-dessus ni en dessous de l'élément interne 43 du chant 40. The configuration illustrated in figure 3 comprises two additional layers 45, 46 of an elastomeric material, typically based on rubber, of a very fine thickness, of a few tenths of a millimeter, typically of 0.18 mm. In this embodiment, the layers 45 and 46 respectively extend above the core over the entire width thereof, and interrupt with it without passing either above or below the inner member 43. of singing 40.

Dans la variante illustrée à la figure 4, les couches élastomériques 55,56 interposées entre le noyau et respectivement l'ensemble supérieur 10 et l'ensemble inférieur 2 se prolongent latéralement jusqu'en dessus et en dessous de l'élément interne 53 du chant 50. In the variant illustrated in figure 4 , the elastomeric layers 55, 56 interposed between the core and the upper assembly 10 and the lower assembly 2 extend laterally to above and below the inner element 53 of the edge 50.

Dans la variante illustrée à la figure 5, la planche comporte une couche élastomérique, interposée entre le noyau 9 et l'ensemble supérieur 10. Plus précisément, cette couche 65 s'étend latéralement jusqu'à venir au contact de l'élément intermédiaire 62 du chant 60. Complémentairement, la planche comporte deux bandes de caoutchouc 66,67, interposées entre le dessous de l'élément externe du chant 60 et l'ensemble inférieur 2. Ces bandes 66,67 viennent au contact de l'élément intermédiaire 62 du chant 60. In the variant illustrated in figure 5 , the board comprises an elastomeric layer, interposed between the core 9 and the upper assembly 10. More specifically, this layer 65 extends laterally to come into contact with the intermediate element 62 of the edge 60. Complementarily, the board comprises two rubber strips 66, 76, interposed between the underside of the external element of the edge 60 and the lower assembly 2. These strips 66, 67 come into contact with the intermediate element 62 of the edge 60.

Une structure analogue est illustrée à la figure 6. Cette structure comporte une couche typiquement élastomérique 75, interposée entre le noyau 9 et l'ensemble inférieur 2. Cette couche élastomérique s'étend latéralement jusqu'à l'aplomb des éléments intermédiaires 72 du chant 70, également élastomérique. A l'inverse de la figure 5, la planche comporte également deux bandes élastomériques 76,77 disposées sur la face supérieure de l'élément externe 71 des chants 70. A similar structure is illustrated in figure 6 . This structure comprises a typically elastomeric layer 75, interposed between the core 9 and the lower assembly 2. This elastomeric layer extends laterally to the level of the intermediate elements 72 of the edge 70, also elastomeric. Unlike the figure 5 the board also comprises two elastomeric strips 76, 77 disposed on the upper face of the outer member 71 of the edges 70.

Bien entendu, chacun des éléments interne ou externe peut être réalisé par l'assemblage de couches élémentaires verticales, en respectant les rapports entre les rigidités en compression des deux éléments globaux, calculées comme la somme des rigidités de chaque couche élémentaire.Of course, each of the internal or external elements can be achieved by the assembly of vertical elementary layers, respecting the ratios between the compressive stiffnesses of the two global elements, calculated as the sum of the stiffnesses of each elementary layer.

Le matériau élastomérique de l'élément intermédiaire peut présenter des propriétés viscoélastiques dans la plage de température de -20°C et 10°C, pour améliorer le phénomène d'amortissement.The elastomeric material of the intermediate member may exhibit viscoelastic properties in the temperature range of -20 ° C and 10 ° C to improve the damping phenomenon.

Bien que décrite en détail pour une structure de ski, l'invention s'applique également aux surfs des neiges.Although described in detail for a ski structure, the invention also applies to snowboarding.

Il ressort de ce qui précède que la planche de glisse conforme à l'invention présente de multiples avantages, en particulier celui d'assurer à la fois une bonne transmission des efforts depuis le dessus de la planche jusqu'à la carre, par l'intermédiaire de l'élément interne du chant particulièrement rigide, tout en ajoutant une suspension formée par l'ensemble de l'élément externe et de l'élément intermédiaire. De ce fait, il est plus facile pour l'utilisateur de maitriser sa trajectoire, d'augmenter la tenue de la planche sur la courbe, celle-ci étant plus stable, car la suspension filtre en partie les vibrations induites par la géométrie du terrain. La planche de glisse est ainsi plus performante pour l'évolution en compétition, car elle procure donc une sensation de confort dans les phases de virage.It follows from the above that the gliding board according to the invention has multiple advantages, in particular that of ensuring both a good transmission of efforts from the top of the board to the edge, by the intermediate of the inner member of the singularly rigid, while adding a suspension formed by all of the outer member and the intermediate member. Therefore, it is easier for the user to control his trajectory, to increase the resistance of the board on the curve, the latter being more stable, because the suspension partly filters the vibrations induced by the geometry of the terrain. . The gliding board is thus more efficient for evolution in competition, because it thus provides a feeling of comfort in the turning phases.

Claims (15)

  1. Snowboard (1) with an internal structure incorporating:
    - one bottom assembly (2) with a sole (6) that is edged with ski edges (3) and at least one bottom reinforcement (8);
    - one top assembly (10) incorporating at least one top reinforcement (14);
    - one core (9) separating the aforesaid bottom (2) and top (10) assemblies;
    - rims (20) added onto the sides of the core and covered by the top assembly, with these rims being positioned vertically between the top assembly (10) and the bottom assembly (2), and with these rims being composed of multiple parts integral with each other and positioned essentially vertically;
    characterized by the fact that at least one of the rims is composed of three parts, namely one interior part (23), one intermediate part (22) and one exterior part (21), in which the intermediate part (22) is composed of an elastomeric material and the interior part (23) has a compression rigidity exceeding the compression rigidity of the exterior part (21).
  2. Snowboard in accordance with claim 1, characterized by the fact that the compression rigidity of the interior part is between 50,000 and 90,000 N/mm, and the compression rigidity of the exterior part is between 4,000 and 30,000 N/mm.
  3. Snowboard in accordance with claim 1, characterized by the fact that the Young's modulus under compression of the interior part (23) of the rim is greater than 15,000 MPa, and preferably greater than 30,000 MPa.
  4. Snowboard in accordance with claim 1, characterized by the fact that the Young's modulus under compression of the exterior part (21) is less than 11,000 MPa, and preferably less than 2,000 MPa.
  5. Snowboard in accordance with claim 1, characterized by the fact that the interior part (23) is composed of an aluminum layer, and by the fact that the exterior part (21) is composed of a polymeric material.
  6. Snowboard in accordance with claim 1, characterized by the fact that the interior part and the exterior part are formed by the assembly of multiple layers.
  7. Snowboard in accordance with claim 1, characterized by the fact that the intermediate layer has a hardness of between 60 and 80 Shore A.
  8. Snowboard in accordance with claim 1, characterized by the fact that the intermediate part (22) is composed of a layer made of a material chosen from the group including rubber and thermoplastic elastomers of SEBS type.
  9. Snowboard in accordance with claim 1, characterized by the fact that the intermediate part (22) extends over the entire height of the rim.
  10. Snowboard in accordance with claim 1, characterized by the fact that the intermediate part (22) is present on the entire length of the rim.
  11. Snowboard in accordance with claim 1, characterized by the fact that the layer of elastomeric material is present on the portion of the rim extending from the area of the pad up to the cheek.
  12. Snowboard in accordance with claim 1, characterized by the fact that the top part (24) of the interior part is in contact with at least one layer of upper reinforcement (14).
  13. Snowboard in accordance with claim 1, characterized by the fact that the exterior part of the rim has hollow imprints.
  14. Snowboard in accordance with claim 1, characterized by the fact that the exterior part of the rim is composed of a transparent material.
  15. Snowboard in accordance with claim 1, characterized by the fact that it incorporates an elastomeric layer (45, 46, 55, 56, 65, 75) positioned between the core (9) and the top assembly (10) and/or bottom assembly (2).
EP15201420.5A 2014-12-23 2015-12-18 Snowboard with complex sidewalls Active EP3037141B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1463261A FR3030289B1 (en) 2014-12-23 2014-12-23 SNOWBOARD BOARD WITH COMPLEX SONGS

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EP3037141A1 EP3037141A1 (en) 2016-06-29
EP3037141B1 true EP3037141B1 (en) 2018-10-31

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3067615B1 (en) * 2017-06-16 2019-07-19 Skis Rossignol BOARD OF SLIDERS
AT525607A1 (en) * 2021-11-11 2023-05-15 Isosport Verbundbauteile Ges M B H Method of manufacturing a sidewall for a gliding device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55112577U (en) * 1979-02-01 1980-08-07
EP0180678B1 (en) 1984-11-05 1987-10-14 Skis Rossignol S.A. Ski
AT388874B (en) * 1985-12-12 1989-09-11 Kaestle Gmbh SKI
AT388875B (en) 1987-08-12 1989-09-11 Rohrmoser Alois Skifabrik SKI
DE4322300C2 (en) * 1992-07-16 2002-12-19 Atomic Austria Gmbh Altenmarkt Ski with a shell, a lower flange and an upper flange, preferably integrated into the shell, and method for producing a ski
FR2703915B1 (en) * 1993-04-16 1995-06-02 Rossignol Sa Ski with edges and upper shell.
FR2757450B1 (en) * 1996-12-24 1999-02-26 Salomon Sa PROCESS FOR DECORATING A COMPOSITE ARTICLE OF THE SKI, SURF, SKATEBOARD OR CYCLE COMPONENT
US20110206895A1 (en) * 2010-01-26 2011-08-25 Drake Powderworks Llc Carbon fiber laminate ski or snowboard with metal rib core dampening system

Non-Patent Citations (1)

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Title
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EP3037141A1 (en) 2016-06-29
FR3030289A1 (en) 2016-06-24
FR3030289B1 (en) 2018-07-06

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