EP0623370A1 - Interface between ski and bindings - Google Patents

Interface between ski and bindings Download PDF

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Publication number
EP0623370A1
EP0623370A1 EP94103763A EP94103763A EP0623370A1 EP 0623370 A1 EP0623370 A1 EP 0623370A1 EP 94103763 A EP94103763 A EP 94103763A EP 94103763 A EP94103763 A EP 94103763A EP 0623370 A1 EP0623370 A1 EP 0623370A1
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EP
European Patent Office
Prior art keywords
ski
plate
support
stop
wedge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP94103763A
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German (de)
French (fr)
Inventor
Lionel Astier
Benoît Saillet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Salomon SAS
Original Assignee
Salomon SAS
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Filing date
Publication date
Application filed by Salomon SAS filed Critical Salomon SAS
Publication of EP0623370A1 publication Critical patent/EP0623370A1/en
Ceased legal-status Critical Current

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Classifications

    • 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
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/07—Skis or snowboards with special devices thereon, e.g. steering devices comprising means for adjusting stiffness
    • 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
    • A63C9/003—Non-swivel sole plate fixed on the ski

Definitions

  • the invention relates to an interface device between a ski and front and rear binding elements which are intended to retain a boot bearing on the ski.
  • the invention also relates to a ski equipped with such an interface device, as well as fastening elements associated with this interface device.
  • a shoe is held in abutment on the ski generally by a front binding element and a rear binding element, which each retain an end piece of the shoe sole.
  • the binding elements are assembled directly on the upper surface of the ski.
  • the pressure distribution of the ski on the snow depends on the internal structure of the ski, that is to say on its own flexibility. It also depends on the action that the binding elements exert on the ski. This pressure distribution also depends on the ski phase in which the skier is in an instantaneous manner, in particular the phase for initiating a turn, or the driving phase. In these phases, in fact, the skier acts by his weight or by his impulses on the ski. On the other hand, the curvature of the ski varies.
  • an interface device is known from patent application No. WO 83/03 360.
  • This device comprises a plate on which the fixing elements are mounted. Under the plate is an elastically compressible material. One end of the plate is assembled integrally with the ski, the other end can slide freely, against the elastic restoring force of small blocks of compressible material.
  • Also known from patent application DE-OS 2 259 375 is a device which comprises a leaf spring assembled to the ski at each of its extremities.
  • the fastening elements are assembled on the leaf spring.
  • This spring leaf pre-stresses the beam of the ski in inflection, which concentrates the pressure of the ski on the snow under the skate.
  • This spring blade makes the ski more pivoting.
  • the influence it exerts on the ski varies with the vertical position of the boot above the ski.
  • One of the aims of the present invention is to provide an interface device which ensures good transmission of the ski driving forces between the boot and the ski.
  • Another object of the present invention is to provide an interface device which ensures effective damping of the flexions of the ski in a vertical and longitudinal plane, and a precise transmission of the efforts of piloting the boot on the ski during the initiations of turns and in driving phase.
  • Another object of the present invention is to provide an interface device which exerts on the ski a non-zero action when the ski is flat.
  • Another object of the present invention is to provide an interface device whose action on the ski can be adjusted.
  • the interface device comprises a slender plate, each end of which is connected to the ski, the plate having, towards each of its ends, a mounting zone for receiving the fixing elements in an integral manner, one end of the plate known as the first end being joined to the ski in solidarity,
  • the other end called the second end being movable relative to the ski, and being able to move relative to the ski in a single longitudinal direction during the bending movements of the ski.
  • the plate is rigid in flexion and substantially planar, that it extends above the upper surface of the ski, parallel to it, and that connecting means acting in a longitudinal direction constrain the plate in traction while resting on the ski, and constrain by reaction the ski in compression in the zone of the plate, at the level of its upper surface.
  • FIG. 1 is a side view, in section, of a ski in the area of the skate equipped with fastening elements, and of an interface device according to a first nonlimiting embodiment of the invention.
  • FIG. 2 is a perspective view showing the interface device of FIG. 1.
  • FIGS 3 and 4 illustrate the operation of the interface device of Figure 1.
  • Figure 5 is a partial view of the front part of an interface device, and illustrates an alternative embodiment of the invention.
  • Figure 6 is a view similar to Figure 5, and illustrates another alternative embodiment of the invention.
  • FIGS 7 and 8 illustrate another alternative embodiment of the invention.
  • FIG. 1 represents the central part of a ski 1.
  • a boot 2 is retained in abutment on the ski 1 by a front fixing element 3 and a rear fixing element 4.
  • the front fastening element 3 has a jaw 5 for retaining the front end of the shoe.
  • the jaw 5 is carried by a body 7 which is connected to the ski via a base 8.
  • the base 8 is extended towards the rear by a support plate 9, on which the shoe sole rests, in its front part.
  • the rear binding element 4 has a jaw 10 for retaining the rear end of the boot, which is carried by a body 11.
  • the body 11 is itself connected to the ski by means of a base 12.
  • the base 12 has in its front part a support plate 13, on which the rear end of the sole of the shoe rests.
  • the body 11 is slidably mounted along the base 12, and a spring opposes the rearward movements of the body, which occur during the engagement of the shoe in the fastening elements, and then during ski flexions.
  • a spring opposes the rearward movements of the body, which occur during the engagement of the shoe in the fastening elements, and then during ski flexions.
  • this spring under the action of this spring, the shoe sole is pinched between the jaw 5 of the front fastening element, and the jaw 10 of the rear fastening element. This thrust is also transmitted by reaction to the bases 8 and 12 of the front and rear fixing elements, as well as their respective support.
  • the front and rear fastening elements 3 and 4 are connected to the ski 1 via an interface device 14 which will now be described in more detail.
  • the interface device comprises a long plate 15 which extends in a longitudinal direction between the fastening elements 3 and 4 and the upper surface of the ski. As can be seen in FIGS. 1 and 2, over most of its length, the plate 15 is planar, and it extends parallel to the upper surface of the ski, being raised relative to it. ci of a constant height.
  • the plate 15 is inextensible, and it preferably has a high resistance to bending and twisting. It is made of any suitable material, in particular an aluminum alloy or a composite material. Naturally, its structure can be lightened locally by openings and locally reinforced by ribs or any other suitable means.
  • the plate 15 In its front part, the plate 15 has a front mounting zone 15a, for receiving the base 8 of the front fixing element 3 in an integral manner. In the same way, in its rear part, the plate 15 has a zone mounting 15b, which is intended to receive integrally the base 12 of the rear fixing element 4.
  • the two front and rear fixing elements 3 and 4 are therefore assembled to the plate 15 by means of their base respective. As the two fixing bases are mounted on the plate 15, the thrust of the rear fixing element is absorbed by the plate and is not transmitted to the beam of the ski 1.
  • the plate 15 is connected to the ski in its front part and in its rear part. In its rear part, the plate 15 has a lowered end 16 which touches the upper surface of the ski.
  • the end 16 is assembled in a manner integral with the ski, by any suitable means, and for example by screws shown diagrammatically at 17.
  • the rear part of the plate could have a shoe, or a wedge, which keeps it raised relative to the ski. The connection would then be made by screws which pass through the plate and the wedge or the shoe. This wedge could also be under the base 12 of the rear fixing element.
  • the front end of the plate is movable relative to the ski in the longitudinal direction defined by the ski. Since the plate is raised relative to the upper surface of the ski, a relative movement between the front end of the plate and the upper surface of the ski occurs during ski flexions.
  • connection means In addition, the front end of the plate is connected to the ski, or to an element integral with the ski, by connection means. According to the invention, these means induce in the plate a prestress in tension, and by reaction of a prestress in compression of the central zone of the ski, at the level of its upper surface.
  • these means are produced so as to induce a prestress in the plate, the effect of which is canceled out beyond a determined flexion of the ski.
  • the effect of this prestressing is to accentuate in the central area of the ski the pressure of the ski on the snow in the phase of initiation of turns. The ski is then more pivoting. During the driving phase, the ski flexes. The effect produced by the initial prestressing of the connecting means is canceled out, and the pressure distribution of the ski on the snow is similar to that of a traditional ski.
  • the connecting means act again on the plate 15, but so as to constrain it in pressure.
  • the plate then acts as a stiffener in the central area of the ski.
  • the pressure of the ski on the snow decreases in amplitude in the central area of the ski, and spreads towards each of the ends of the ski.
  • the plate 15 is horizontal above the ski for most of its length.
  • the prestressing and stressing actions that the connecting means exert on the plate and on the ski are generally oriented in a horizontal and longitudinal direction.
  • connection means are located at the level of the extreme front part of the plate 15.
  • a wedge 20 is interposed between the upper surface of the ski and the plate.
  • the shim 20 has a substantially constant thickness, at least over part of its length, and over this part of its length, it offers a bearing surface for the plate 15 in a vertical direction.
  • FIG. 2 represents orifices 21 which pass through the plate 15 right through, and which allow access to the assembly screws of the wedge 20 in skiing.
  • the wedge 20 In its front part, the wedge 20 has a vertical and transverse surface 22, the role of which will be described later.
  • the plate 15 extends beyond the transverse surface 22 and it has at this level a rim 23 oriented towards the upper surface of the ski.
  • the figures show the rim 23 in the form of a fold of the plate.
  • the rim 23 could also be produced by a shim which would be assembled at the front end of the plate.
  • the rim 23 has a sufficient height to cover the surface 22 over at least part of its height.
  • connection means comprise means which act by pushing, that is to say which tend to distance the rim 23 and the wedge 22 from each other.
  • these means are shown in the form of two screws 24 and 25 which are screwed into the threaded orifices of the flange 23 oriented parallel to the longitudinal axis of the ski.
  • the screws In front of the rim 23, the screws have a head by which they can be operated. Behind the rim, they have a support end which is intended to come into simple support against the surface 22 of the wedge 20, so as to establish a unidirectional thrust connection.
  • the screws 24 and 25 are oriented in the longitudinal direction of the ski, and they can be screwed or unscrewed, so that they generally move in a longitudinal direction. In addition, they are offset in height relative to to the upper surface of the ski, so that their bearing area on the surface 22 is offset in height relative to this upper surface of the ski. In the embodiment shown, the screws are located approximately halfway between the plate and the upper surface of the ski. This, however, is not limitative.
  • the longitudinal position of the screws is determined in such a way that when the ski is flat, in particular in the phases of initiation of turns, the screws are supported on the surface 22 and exert a constraint, and when the ski is bent, in particular in the driving phases, the screws leave their bearing on the surface 22, and therefore, the constraint that they exert is canceled.
  • the front end of the plate which carries the screws 24 and 25 advances relative to the wedge 20 which constitutes the support of the screws 24 and 25.
  • the adjustment of the screws is done in these conditions as follows. Starting from a rest position of the ski, and a position of flush with the screws 24 and 25, without constraint, on the surface 22, the screws 24 and 25 are offset towards the rear of the ski by a lesser distance or equal to the amplitude of the relative movement, in a longitudinal direction, between the rim 23 and the wedge 20 which occurs when the ski reaches a flexion similar to that of the driving phases of the turns.
  • any suitable means is suitable for immobilizing the screws if necessary in their desired longitudinal position, and for example a lock nut in the case of a threaded screw.
  • FIG. 3 illustrates the rest position of the ski 1, in which the screws 24 and 25 bear in preload against the wedge 20.
  • the ski is shown with the bending that it takes during the driving phases .
  • the screws 24 and 25 leave their bearing on the surface 22, and the prestressing effect which they produced is canceled.
  • the plate 15 has in its central part oblong orifices 30 which are oriented in a longitudinal direction, and which are distributed over the surface of the plate. These orifices 30 pass right through the plate. They are shouldered, and they cooperate with washers 31, which have an oblong shape of length less than that of the orifices 30, and of substantially equal width. The washers 31 are also shouldered. They are secured to the ski by any suitable means, for example by screws 32. The washers 31 have the function of guiding the plate 15 throughout its surface, allowing its movement in a longitudinal and horizontal direction, but prohibiting any other lateral or vertical movement with respect to the ski.
  • the shim 20 has in its front part, under the plate 15, a recess which is filled with a layer of damping material 33.
  • This layer adheres to the shim 20 and to the lower surface of the plate 15. It has the function of damping the longitudinal movements of the front end of the plate relative to the ski, by deforming in shear.
  • the layer 33 is for example constituted by a damping material which has viscoelastic properties.
  • the recess occupied by the layer 33 is preferably located in front of the base 8 of the front fixing element 3. However, it can extend under the base, along the middle of the width of the plate, leaving direct contact between the lateral edges of the plate and of the cleat 20. Thus there is a direct transmission of the stresses and of the driving orders that the skier gives to the ski along the lateral edges of the cleat in the direction of the edges.
  • a layer of damping material 35 is interposed between the plate 15 and the upper surface of the ski.
  • the layer 35 is located mainly under the rear fixing element 4, in particular under the support plate 13.
  • This layer 35 therefore exerts an effect complementary to that created by the connecting means.
  • the layer 35 allows damping under the heel of vibrations and shocks, in a vertical direction.
  • FIG. 5 represents an alternative embodiment of the invention, according to which the connection means comprise one or more screws 40, which freely pass through an orifice 41 of the flange 23, and which are screwed into a tapped orifice 42 of the wedge 20.
  • the screw 40 Between the rim 23 and the wedge 20, the screw 40 carries a nut or possibly a ring 44, the longitudinal position of which is adjustable. Outside the rim 23, the screw 40 has a head 45, the longitudinal position of which is also adjustable by screwing or unscrewing.
  • the nut 44 and the part of the screw 40 situated towards the shim 20 play a role similar to that of the preceding screws 24 and 25.
  • the nut 44 is moved longitudinally in the direction of the rim 23 d 'a determined distance, to exert on the plate 15 a tensile stress by bearing on the shim 20.
  • this stress is canceled more or less soon during bending of the ski.
  • the head 45 When the ski is at rest, the head 45 is released forward with respect to the rim 23. During the bending of the ski, the rim 23 is driven in longitudinal movements relative to the wedge 20. In the event of significant bending of the ski , the rim 23 comes to bear against the head 45, and is then retained by this head.
  • the connecting means therefore generate in the plate a compressive stress and the plate 15 then acts on the ski as a stiffener in its central area.
  • the longitudinal position of the head 45 relative to the rim 23 can be adjusted, and preferably, when the ski is at rest, this distance is greater than the displacement of the nut 44 which caused the preload, but it is less than the amplitude of the relative movement between the rim 23 and the wedge 20, which occurs during strong, or very strong ski flexions.
  • the flexion of the ski becomes more pronounced, the head 45 then becomes active and the plate 15 behaves like a stiffener, which momentarily improves the guide qualities of the ski.
  • FIG. 6 illustrates an alternative embodiment according to which washers of damping material 48 and 49 are interposed respectively between the head 45 and the rim 23, and between the nut 44 and the rim 23. These washers make the changes more gradual between the different modes of action of the connecting means on the ski.
  • the connecting means which act between the plate 15 and the ski are not limited to the various embodiments which have been described.
  • FIGS. 7 and 8 illustrate an alternative embodiment, according to which the plate 15a has in its front part a transverse orifice 57. This orifice is limited towards the front and towards the rear by two inclined faces 51 and 52.
  • a beveled shim 53 the height of which is adjusted by means of screws 54 is located in the front part of the orifice 52. This beveled shim acts on the inclined face 51, and induces on the plate 15a an effect similar to that of the screws 24 and 25, or that of nut 44.
  • a beveled shim 56 located behind the orifice 52 has a height adjustable by means of screws 50c.
  • the wedge 56 is released relative to the inclined face 50 of the orifice 52, but it is provided to engage this face during strong bending of the ski.
  • This wedge 56 plays the same role as the head 45 of the screws previously described.
  • the inclination of the faces 51 and 50 is provided in such a way that the orifice 52 is flared upwards.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

The invention relates to an interface device between a ski and front and rear bindings 3 and 4 which are intended to hold the ends of a boot on the ski. The device comprises a longitudinal plate 15, each end of which is connected to the ski in front of and behind the bindings 3 and 4. One end 16 of the plate is assembled on the ski in an integral manner. The other end 23 of the plate is movable with respect to the ski, and linking means 24 exert a thrust against a wedge 20, integral with the ski, which prestresses the plate 15 in traction and, by reaction, the upper surface of the ski, in its central zone, in compression. This prestress preferably ceases beyond a specific flexing of the ski. <IMAGE>

Description

L'invention concerne un dispositif interface entre un ski et des éléments de fixation avant et arrière qui sont destinés à retenir une chaussure en appui sur le ski.The invention relates to an interface device between a ski and front and rear binding elements which are intended to retain a boot bearing on the ski.

L'invention concerne également un ski équipé d'un tel dispositif interface, ainsi que des éléments de fixation associés à ce dispositif interface.The invention also relates to a ski equipped with such an interface device, as well as fastening elements associated with this interface device.

Une chaussure est retenue en appui sur le ski généralement par un élément de fixation avant et un élément de fixation arrière, qui retiennent chacun un embout de la semelle de chaussure. De façon usuelle, les éléments de fixation sont assemblés directement sur la surface supérieure du ski.A shoe is held in abutment on the ski generally by a front binding element and a rear binding element, which each retain an end piece of the shoe sole. Usually, the binding elements are assembled directly on the upper surface of the ski.

Il est connu que pendant la pratique du ski, le comportement du ski sur la neige est influencé par la répartition de pression de la surface de glisse du ski sur la neige, le long du ski. Ainsi, une répartition de pression concentrée dans la zone centrale du ski ou patin, où se situe la chaussure, rend le ski très pivotant. D'un autre côté, une répartition de pression moins accentuée dans la zone centrale, et plus étalée vers l'avant et l'arrière du ski rend le ski plus guidant.It is known that during skiing, the behavior of the ski on snow is influenced by the pressure distribution of the sliding surface of the ski on snow, along the ski. Thus, a concentrated pressure distribution in the central area of the ski or skate, where the boot is located, makes the ski very pivoting. On the other hand, a less pronounced pressure distribution in the central zone, and more spread out towards the front and the back of the ski makes the ski more guiding.

La répartition de pression du ski sur la neige dépend de la structure interne du ski, c'est-à-dire de sa flexibilité propre. Elle dépend aussi de l'action que les éléments de fixations exercent sur le ski. Cette répartition de pression dépend également de la phase de ski dans laquelle le skieur se trouve, de façon instantanée, notamment phase de déclenchement de virage, ou phase de conduite. Dans ces phases, en effet, le skieur agit par son poids ou par ses impulsions sur le ski. D'autre part, la courbure du ski varie.The pressure distribution of the ski on the snow depends on the internal structure of the ski, that is to say on its own flexibility. It also depends on the action that the binding elements exert on the ski. This pressure distribution also depends on the ski phase in which the skier is in an instantaneous manner, in particular the phase for initiating a turn, or the driving phase. In these phases, in fact, the skier acts by his weight or by his impulses on the ski. On the other hand, the curvature of the ski varies.

On a cherché différents types d'interfaces qui sont placés entre les éléments de fixation et le ski, dans le but de modifier la réaction du ski aux sollicitations provenant du skieur et du terrain sur lequel le ski glisse.We have looked for different types of interfaces which are placed between the binding elements and the ski, with the aim of modifying the reaction of the ski to the stresses coming from the skier and from the terrain on which the ski slides.

Par exemple, un dispositif interface est connu d'après la demande de brevet n° WO 83/03 360. Ce dispositif comprend une plaque sur laquelle sont montés les éléments de fixation. Sous la plaque se trouve un matériau élastiquement compressible. Une extrémité de la plaque est assemblée de façon solidaire au ski, l'autre extrémité peut coulisser librement, contre la force de rappel élastique de petits blocs de matériau compressible.For example, an interface device is known from patent application No. WO 83/03 360. This device comprises a plate on which the fixing elements are mounted. Under the plate is an elastically compressible material. One end of the plate is assembled integrally with the ski, the other end can slide freely, against the elastic restoring force of small blocks of compressible material.

Un tel dispositif donne de bons résultats, mais la transmission des sollicitations et des efforts entre la chaussure et le ski n'est pas optimale. En effet, les sollicitations et les efforts verticaux transitent en grande partie par les extrémités de la plaque qui sont déportées par rapport aux extrémités de la chaussure. En outre, l'action de ce dispositif est passive, c'est à dire que cette action est nulle lorsque le ski est à plat et elle augmente progressivement en fonction de la flexion du ski.Such a device gives good results, but the transmission of the stresses and forces between the boot and the ski is not optimal. Indeed, the stresses and the vertical forces pass largely through the ends of the plate which are offset relative to the ends of the shoe. In addition, the action of this device is passive, that is to say that this action is zero when the ski is flat and it gradually increases as a function of the flexing of the ski.

On connait également d'après la demande de brevet DE-OS 2 259 375 un dispositif qui comprend une lame ressort assemblée au ski à chacune de ses extrémités. Les éléments de fixation sont assemblés sur la lame ressort. Cette lame ressort précontraint la poutre du ski en contreflexion, ce qui concentre sous le patin la pression du ski sur la neige. Cette lame ressort rend le ski plus pivotant. Toutefois, l'influence qu'elle exerce sur le ski varie avec la position verticale de la chaussure au dessus du ski.Also known from patent application DE-OS 2 259 375 is a device which comprises a leaf spring assembled to the ski at each of its extremities. The fastening elements are assembled on the leaf spring. This spring leaf pre-stresses the beam of the ski in inflection, which concentrates the pressure of the ski on the snow under the skate. This spring blade makes the ski more pivoting. However, the influence it exerts on the ski varies with the vertical position of the boot above the ski.

Un autre inconvénient de ce dispositif est que la chaussure se trouve isolée du ski sur toute sa longueur par une couche de matériau déformable. En outre, les sollicitations qui transitent entre la chaussure et le ski sont en partie filtrées par cette couche amortissante, et en partie transmise au ski par les deux extrémités de la lame ressort, qui sont situées à une distance importante des extrémités de la chaussure. La conduite du ski n'est donc pas précise.Another drawback of this device is that the boot is isolated from the ski over its entire length by a layer of deformable material. In addition, the stresses which pass between the boot and the ski are partly filtered by this damping layer, and partly transmitted to the ski by the two ends of the leaf spring, which are located at a significant distance from the ends of the boot. Skiing is therefore not precise.

Un des buts de la présente invention est de proposer un dispositif interface qui assure une bonne transmission des efforts de pilotage du ski entre la chaussure et le ski.One of the aims of the present invention is to provide an interface device which ensures good transmission of the ski driving forces between the boot and the ski.

Un autre but de la présente invention est de proposer un dispositif interface qui assure un amortissement efficace des flexions du ski dans un plan vertical et longitudinal, et une transmission précise des efforts de pilotage de la chaussure sur le ski lors des déclenchements de virages et en phase de conduite.Another object of the present invention is to provide an interface device which ensures effective damping of the flexions of the ski in a vertical and longitudinal plane, and a precise transmission of the efforts of piloting the boot on the ski during the initiations of turns and in driving phase.

Un autre but de la présente invention est de proposer un dispositif interface qui exerce sur le ski une action non nulle lorsque le ski est à plat.Another object of the present invention is to provide an interface device which exerts on the ski a non-zero action when the ski is flat.

Un autre but de la présente invention est de proposer un dispositif interface dont l'action sur le ski peut être réglée.Another object of the present invention is to provide an interface device whose action on the ski can be adjusted.

D'autres buts et avantages de l'invention apparaîtront au cours de la description qui va suivre, cette description étant toutefois donnée à titre indicatif et non limitatif.Other objects and advantages of the invention will appear during the description which follows, this description being however given by way of non-limiting indication.

Le dispositif interface selon l'invention comprend une plaque longiligne dont chaque extrémité est reliée au ski, la plaque présentant vers chacune de ses extrémités une zone de montage pour recevoir de façon solidaire les éléments de fixation, une extrémité de la plaque dite première extrémité étant assemblée au ski de façon solidaire,The interface device according to the invention comprises a slender plate, each end of which is connected to the ski, the plate having, towards each of its ends, a mounting zone for receiving the fixing elements in an integral manner, one end of the plate known as the first end being joined to the ski in solidarity,

l'autre extrémité, dite seconde extrémité étant mobile par rapport au ski, et pouvant se déplacer relativement au ski selon une seule direction longitudinale lors des mouvements de flexion du ski.the other end, called the second end being movable relative to the ski, and being able to move relative to the ski in a single longitudinal direction during the bending movements of the ski.

Il est caractérisé par le fait que la plaque est rigide en flexion et sensiblement plane, qu'elle s'étend au dessus de la surface supérieure du ski, parallèlement à celle-ci, et que des moyens de liaison agissant selon une direction longitudinale contraignent la plaque en traction en prenant appui sur le ski, et contraignent par réaction le ski en compression dans la zone de la plaque, au niveau de sa surface supérieure.It is characterized by the fact that the plate is rigid in flexion and substantially planar, that it extends above the upper surface of the ski, parallel to it, and that connecting means acting in a longitudinal direction constrain the plate in traction while resting on the ski, and constrain by reaction the ski in compression in the zone of the plate, at the level of its upper surface.

L'invention sera mieux comprise en se référant à la description ci-dessous, ainsi qu'aux dessins en annexe qui en font partie intégrante.The invention will be better understood by referring to the description below, as well as to the accompanying drawings which form an integral part thereof.

La figure 1 est une vue de côté, en coupe, d'un ski dans la zone du patin équipé d'éléments de fixation, et d'un dispositif interface selon un premier mode non limitatif de mise en oeuvre de l'invention.FIG. 1 is a side view, in section, of a ski in the area of the skate equipped with fastening elements, and of an interface device according to a first nonlimiting embodiment of the invention.

La figure 2 est une vue en perspective représentant le dispositif interface de la figure 1.FIG. 2 is a perspective view showing the interface device of FIG. 1.

Les figures 3 et 4 illustrent le fonctionnement du dispositif interface de la figure 1.Figures 3 and 4 illustrate the operation of the interface device of Figure 1.

La figure 5 est une vue partielle de la partie avant d'un dispositif interface, et illustre une variante de mise en oeuvre de l'invention.Figure 5 is a partial view of the front part of an interface device, and illustrates an alternative embodiment of the invention.

La figure 6 est une vue semblable à la figure 5, et illustre une autre variante de mise en oeuvre de l'invention.Figure 6 is a view similar to Figure 5, and illustrates another alternative embodiment of the invention.

Les figures 7 et 8 illustrent une autre variante de mise en oeuvre de l'invention.Figures 7 and 8 illustrate another alternative embodiment of the invention.

La figure 1 représente la partie centrale d'un ski 1. Dans cette partie centrale, de façon connue, une chaussure 2 est retenue en appui sur le ski 1 par un élément de fixation avant 3 et un élément de fixation arrière 4.FIG. 1 represents the central part of a ski 1. In this central part, in a known manner, a boot 2 is retained in abutment on the ski 1 by a front fixing element 3 and a rear fixing element 4.

De façon connue, l'élément de fixation avant 3 présente une mâchoire 5 de retenue de l'extrémité avant de la chaussure. La mâchoire 5 est portée par un corps 7 qui est relié au ski par l'intermédiaire d'une embase 8. Ainsi que cela est visible dans la figure 1, l'embase 8 se prolonge vers l'arrière par une plaque d'appui 9, sur laquelle repose la semelle de chaussure, dans sa partie avant.In known manner, the front fastening element 3 has a jaw 5 for retaining the front end of the shoe. The jaw 5 is carried by a body 7 which is connected to the ski via a base 8. As can be seen in FIG. 1, the base 8 is extended towards the rear by a support plate 9, on which the shoe sole rests, in its front part.

De façon analogue, l'élément de fixation arrière 4 présente une mâchoire 10 de retenue de l'extrémité arrière de la chaussure, qui est portée par un corps 11. Le corps 11 est lui-même relié au ski par l'intermédiaire d'une embase 12. L'embase 12 présente dans sa partie avant une plaque d'appui 13, sur laquelle repose l'extrémité arrière de la semelle de la chaussure.Similarly, the rear binding element 4 has a jaw 10 for retaining the rear end of the boot, which is carried by a body 11. The body 11 is itself connected to the ski by means of a base 12. The base 12 has in its front part a support plate 13, on which the rear end of the sole of the shoe rests.

De façon connue, le corps 11 est monté coulissant le long de l'embase 12, et un ressort s'oppose aux mouvements vers l'arrière du corps, qui se produisent lors de l'engagement de la chaussure dans les éléments de fixation, et ensuite lors des flexions de ski. De façon connue, sous l'action de ce ressort, la semelle de chaussure est pincée entre la mâchoire 5 de l'élément de fixation avant, et la mâchoire 10 de l'élément de fixation arrière. Cette poussée est également transmise par réaction aux embases 8 et 12 des éléments de fixation avant et arrière, ainsi que leur support respectif.In known manner, the body 11 is slidably mounted along the base 12, and a spring opposes the rearward movements of the body, which occur during the engagement of the shoe in the fastening elements, and then during ski flexions. In known manner, under the action of this spring, the shoe sole is pinched between the jaw 5 of the front fastening element, and the jaw 10 of the rear fastening element. This thrust is also transmitted by reaction to the bases 8 and 12 of the front and rear fixing elements, as well as their respective support.

Les éléments de fixation avant et arrière 3 et 4 sont reliés au ski 1 par l'intermédiaire d'un dispositif interface 14 qui va maintenant être décrit plus en détail.The front and rear fastening elements 3 and 4 are connected to the ski 1 via an interface device 14 which will now be described in more detail.

Le dispositif interface comprend une plaque longiligne 15, qui s'étend selon une direction longitudinale entre les éléments de fixation 3 et 4 et la surface supérieure du ski. Tel que cela est visible dans les figures 1 et 2, sur la plus grande partie de sa longueur, la plaque 15 est plane, et elle s'étend de façon parallèle à la surface supérieure du ski, en étant surélevée par rapport à celle-ci d'une hauteur constante.The interface device comprises a long plate 15 which extends in a longitudinal direction between the fastening elements 3 and 4 and the upper surface of the ski. As can be seen in FIGS. 1 and 2, over most of its length, the plate 15 is planar, and it extends parallel to the upper surface of the ski, being raised relative to it. ci of a constant height.

La plaque 15 est inextensible, et elle présente de préférence une résistance élevée à la flexion et à la torsion. Elle est réalisée en tout matériau approprié notamment en alliage d'alluminium ou en matériau composite. Naturellement, sa structure peut être allégée localement par des ouvertures et renforcée localement par des nervures ou tout autre moyen approprié.The plate 15 is inextensible, and it preferably has a high resistance to bending and twisting. It is made of any suitable material, in particular an aluminum alloy or a composite material. Naturally, its structure can be lightened locally by openings and locally reinforced by ribs or any other suitable means.

Dans sa partie avant, la plaque 15 présente une zone de montage avant 15a, pour recevoir de façon solidaire l'embase 8 de l'élément de fixation avant 3. De la même façon, dans sa partie arrière, la plaque 15 présente une zone de montage 15b, qui est destinée à recevoir de façon solidaire l'embase 12 de l'élément de fixation arrière 4. Les deux éléments de fixation avant et arrière 3 et 4 sont donc assemblés à la plaque 15 par l'intermédiaire de leur embase respective. Comme les deux embases de fixation sont montées sur la plaque 15, la poussée de l'élément de fixation arrière est absorbée par la plaque et n'est pas transmise à la poutre du ski 1.In its front part, the plate 15 has a front mounting zone 15a, for receiving the base 8 of the front fixing element 3 in an integral manner. In the same way, in its rear part, the plate 15 has a zone mounting 15b, which is intended to receive integrally the base 12 of the rear fixing element 4. The two front and rear fixing elements 3 and 4 are therefore assembled to the plate 15 by means of their base respective. As the two fixing bases are mounted on the plate 15, the thrust of the rear fixing element is absorbed by the plate and is not transmitted to the beam of the ski 1.

La plaque 15 est reliée au ski dans sa partie avant et dans sa partie arrière. Dans sa partie arrière, la plaque 15 présente une extrémité abaissée 16, qui vient effleurer la surface supérieure du ski. L'extrémité 16 est assemblée de façon solidaire au ski, par tout moyen approprié, et par exemple par des vis schématisées en 17. Naturellement, ceci n'est pas limitatif, et tout autre moyen de solidarisation de l'extrémité arrière de la plaque au ski convient. Par exemple, la partie arrière de la plaque pourrait présenter un sabot, ou une cale, qui la maintient surélevé par rapport au ski. La solidarisation se ferait alors par des vis qui traversent la plaque et la cale ou le sabot. Cette cale pourrait aussi être sous l'embase 12 de l'élément de fixation arrière.The plate 15 is connected to the ski in its front part and in its rear part. In its rear part, the plate 15 has a lowered end 16 which touches the upper surface of the ski. The end 16 is assembled in a manner integral with the ski, by any suitable means, and for example by screws shown diagrammatically at 17. Naturally, this is not limiting, and any other means of securing the rear end of the plate skiing is suitable. For example, the rear part of the plate could have a shoe, or a wedge, which keeps it raised relative to the ski. The connection would then be made by screws which pass through the plate and the wedge or the shoe. This wedge could also be under the base 12 of the rear fixing element.

L'extrémité avant de la plaque est mobile par rapport au ski selon la direction longitudinale définie par le ski. Etant donné que la plaque est surélevée par rapport à la surface supérieure du ski, un mouvement relatif entre l'extrémité avant de la plaque et la surface supérieure du ski se produit lors des flexions de ski.The front end of the plate is movable relative to the ski in the longitudinal direction defined by the ski. Since the plate is raised relative to the upper surface of the ski, a relative movement between the front end of the plate and the upper surface of the ski occurs during ski flexions.

En outre, l'extrémité avant de la plaque est reliée au ski, ou à un élément solidaire du ski, par des moyens de liaison. Selon l'invention, ces moyens induisent dans la plaque une précontrainte en traction, et par réaction d'une précontrainte en compression de la zone centrale du ski, au niveau de sa surface supérieure.In addition, the front end of the plate is connected to the ski, or to an element integral with the ski, by connection means. According to the invention, these means induce in the plate a prestress in tension, and by reaction of a prestress in compression of the central zone of the ski, at the level of its upper surface.

De préférence, ces moyens sont réalisés de façon à induire dans la plaque une précontrainte dont l'effet s'annule au-delà d'une flexion déterminée du ski. En d'autres termes dans le cas notamment d'un virage, l'effet de cette précontrainte est d'accentuer dans la zone centrale du ski la pression du ski sur la neige en phase de déclenchement de virages. Le ski est alors plus pivotant. Au cours de la phase de conduite, le ski fléchit. L'effet produit par la précontrainte initiale des moyens de liaison s'annule, et la répartition de pression du ski sur la neige est semblable à celle d'un ski traditionnel.Preferably, these means are produced so as to induce a prestress in the plate, the effect of which is canceled out beyond a determined flexion of the ski. In other words, in the case in particular of a turn, the effect of this prestressing is to accentuate in the central area of the ski the pressure of the ski on the snow in the phase of initiation of turns. The ski is then more pivoting. During the driving phase, the ski flexes. The effect produced by the initial prestressing of the connecting means is canceled out, and the pressure distribution of the ski on the snow is similar to that of a traditional ski.

Selon un mode préférentiel de mise en oeuvre de l'invention, en cas de survirage, ce qui produit une forte flexion du ski, les moyens de liaison agissent de nouveau sur la plaque 15, mais de façon à la contraindre en pression. La plaque agit alors comme un raidisseur de la zone centrale du ski. La pression du ski sur la neige diminue en amplitude dans la zone centrale du ski, et s'étale vers chacune des extrémités du ski.According to a preferred embodiment of the invention, in the event of oversteer, which produces strong flexing of the ski, the connecting means act again on the plate 15, but so as to constrain it in pressure. The plate then acts as a stiffener in the central area of the ski. The pressure of the ski on the snow decreases in amplitude in the central area of the ski, and spreads towards each of the ends of the ski.

De façon avantageuse, la plaque 15 est horizontale au dessus du ski pour la plus grande partie de sa longueur. En outre, les actions de précontrainte et de contrainte que les moyens de liaison exercent sur la plaque et sur le ski sont orientés de façon générale selon une direction horizontale et longitudinale.Advantageously, the plate 15 is horizontal above the ski for most of its length. In addition, the prestressing and stressing actions that the connecting means exert on the plate and on the ski are generally oriented in a horizontal and longitudinal direction.

Selon un premier mode de réalisation représenté dans la figure 1 et 2, les moyens de liaison se trouvent situés au niveau de la partie avant extrême de la plaque 15.According to a first embodiment shown in FIGS. 1 and 2, the connection means are located at the level of the extreme front part of the plate 15.

A ce niveau, une cale 20 est intercalée entre la surface supérieure du ski et la plaque. La cale 20 présente une épaisseur sensiblement constante, au moins sur une partie de sa longueur, et sur cette partie de sa longueur, elle offre une surface d'appui à la plaque 15 selon une direction verticale.At this level, a wedge 20 is interposed between the upper surface of the ski and the plate. The shim 20 has a substantially constant thickness, at least over part of its length, and over this part of its length, it offers a bearing surface for the plate 15 in a vertical direction.

La cale 20 est solidarisée au ski par tout moyen approprié, par exemple par vissage ou par collage. A titre d'illustration, la figure 2 représente des orifices 21 qui traversent la plaque 15 de part en part, et qui permettent d'accéder aux vis d'assemblage de la cale 20 au ski.The wedge 20 is secured to the ski by any suitable means, for example by screwing or by bonding. By way of illustration, FIG. 2 represents orifices 21 which pass through the plate 15 right through, and which allow access to the assembly screws of the wedge 20 in skiing.

Dans sa partie avant, la cale 20 présente une surface verticale et transversale 22, dont le rôle sera décrit ultérieurement.In its front part, the wedge 20 has a vertical and transverse surface 22, the role of which will be described later.

Dans sa partie avant, la plaque 15 s'étend au-delà de la surface transversale 22 et elle présente à ce niveau un rebord 23 orienté vers la surface supérieure du ski. Les figures représentent le rebord 23 sous la forme d'un repli de la plaque. Le rebord 23 pourrait être réalisé également par une cale qui serait assemblée à l'extrémité avant de la plaque. Le rebord 23 présente une hauteur suffisante pour recouvrir la surface 22 sur au moins une partie de sa hauteur.In its front part, the plate 15 extends beyond the transverse surface 22 and it has at this level a rim 23 oriented towards the upper surface of the ski. The figures show the rim 23 in the form of a fold of the plate. The rim 23 could also be produced by a shim which would be assembled at the front end of the plate. The rim 23 has a sufficient height to cover the surface 22 over at least part of its height.

Entre le rebord 23 et la surface 22 les moyens de liaison comprennent des moyens qui agissent par poussée, c'est-à-dire qui tendent à éloigner l'un de l'autre le rebord 23 et la cale 22. Dans les figures 1 et 2 ces moyens sont représentés sous la forme de deux vis 24 et 25 qui sont vissées dans les orifices taraudés du rebord 23 orientés parallèlement à l'axe longitudinal du ski.Between the rim 23 and the surface 22 the connection means comprise means which act by pushing, that is to say which tend to distance the rim 23 and the wedge 22 from each other. In FIGS. 1 and 2 these means are shown in the form of two screws 24 and 25 which are screwed into the threaded orifices of the flange 23 oriented parallel to the longitudinal axis of the ski.

En avant du rebord 23, les vis présentent une tête par laquelle elles peuvent être manoeuvrées. En arrière du rebord, elles présentent une extrémité d'appui qui est destinée à venir en appui simple contre la surface 22 de la cale 20, de façon à établir une liaison unidirectionnelle de poussée.In front of the rim 23, the screws have a head by which they can be operated. Behind the rim, they have a support end which is intended to come into simple support against the surface 22 of the wedge 20, so as to establish a unidirectional thrust connection.

Les vis 24 et 25 sont orientées selon la direction longitudinale du ski, et elles peuvent être vissées ou dévissées, de façon à ce qu'elles se déplacent globalement selon une direction longitudinale. En outre, elles sont décalées en hauteur par rapport à la surface supérieure du ski, pour que leur zone d'appui sur la surface 22 soit décalée en hauteur par rapport à cette surface supérieure du ski. Dans le mode de réalisation représenté, les vis se trouvent environ à mi-hauteur entre la plaque et la surface supérieure du ski. Ceci, toutefois, n'est pas limitatif.The screws 24 and 25 are oriented in the longitudinal direction of the ski, and they can be screwed or unscrewed, so that they generally move in a longitudinal direction. In addition, they are offset in height relative to to the upper surface of the ski, so that their bearing area on the surface 22 is offset in height relative to this upper surface of the ski. In the embodiment shown, the screws are located approximately halfway between the plate and the upper surface of the ski. This, however, is not limitative.

En vissant plus ou moins les vis, on génère entre les extrémités de la cale 20 et du rebord 23 une contrainte de poussée. L'intensité de cette contrainte varie selon la position longitudinale des vis 24 et 25. Cette intensité est aussi déterminée par la hauteur des vis 24 et 25.By screwing the screws more or less, a thrust stress is generated between the ends of the wedge 20 and the rim 23. The intensity of this stress varies according to the longitudinal position of the screws 24 and 25. This intensity is also determined by the height of the screws 24 and 25.

Selon un mode préférentiel de mise en oeuvre de l'invention, la position longitudinale des vis est déterminée de telle façon que lorsque le ski est à plat, notamment dans les phases de déclenchement de virages, les vis soient en appui sur la surface 22 et exercent une contrainte, et lorsque le ski est fléchi, notamment dans les phases de conduite, les vis quittent leur appui sur la surface 22, et de ce fait, la contrainte qu'elles exercent s'annule. En effet, lors de la flexion du ski, l'extrémité avant de la plaque qui porte les vis 24 et 25 s'avance relativement à la cale 20 qui constitue l'appui des vis 24 et 25.According to a preferred embodiment of the invention, the longitudinal position of the screws is determined in such a way that when the ski is flat, in particular in the phases of initiation of turns, the screws are supported on the surface 22 and exert a constraint, and when the ski is bent, in particular in the driving phases, the screws leave their bearing on the surface 22, and therefore, the constraint that they exert is canceled. In fact, during the flexing of the ski, the front end of the plate which carries the screws 24 and 25 advances relative to the wedge 20 which constitutes the support of the screws 24 and 25.

Le réglage des vis se fait dans ces conditions de la façon suivante. En partant d'une position de repos du ski, et une position d'affleurement des vis 24 et 25, sans contrainte, sur la surface 22, les vis 24 et 25 sont décalées vers l'arrière du ski d'une distance inférieure ou égale à l'amplitude du mouvement relatif, selon une direction longitudinale, entre le rebord 23 et la cale 20 qui se produit lorsque le ski atteint une flexion semblable à celle des phases de conduite des virages.The adjustment of the screws is done in these conditions as follows. Starting from a rest position of the ski, and a position of flush with the screws 24 and 25, without constraint, on the surface 22, the screws 24 and 25 are offset towards the rear of the ski by a lesser distance or equal to the amplitude of the relative movement, in a longitudinal direction, between the rim 23 and the wedge 20 which occurs when the ski reaches a flexion similar to that of the driving phases of the turns.

Naturellement, tout moyen approprié convient pour immobiliser le cas échéant les vis dans leur position longitudinale souhaitée, et par exemple un contre-écrou dans le cas d'une vis filetée.Naturally, any suitable means is suitable for immobilizing the screws if necessary in their desired longitudinal position, and for example a lock nut in the case of a threaded screw.

La figure 3 illustre la position de repos du ski 1, dans laquelle les vis 24 et 25 sont en appui avec précontrainte contre la cale 20. Dans la figure 4, le ski est représenté avec la flexion qu'il prend lors des phases de conduite. Dans cette configuration, les vis 24 et 25 quittent leur appui sur la surface 22, et l'effet de précontrainte qu'elles produisaient se trouve annulé.FIG. 3 illustrates the rest position of the ski 1, in which the screws 24 and 25 bear in preload against the wedge 20. In FIG. 4, the ski is shown with the bending that it takes during the driving phases . In this configuration, the screws 24 and 25 leave their bearing on the surface 22, and the prestressing effect which they produced is canceled.

Dans le mode de réalisation préférentiel qui est représenté dans les figures 1 et 2, la plaque 15 présente dans sa partie centrale des orifices oblongs 30 qui sont orientés selon une direction longitudinale, et qui sont répartis sur la surface de la plaque. Ces orifices 30 traversent la plaque de part en part. Ils sont épaulés, et ils coopèrent avec des rondelles 31, qui présentent une forme oblongue de longueur inférieure à celle des orifices 30, et de largeur sensiblement égale. Les rondelles 31 sont également épaulées. Elles sont solidarisées au ski par tout moyen approprié, par exemple par des vis 32. Les rondelles 31 ont pour fonction de guider la plaque 15 tout au long de sa surface, en autorisant son mouvement sur une direction longitudinale et horizontale, mais en interdisant tout autre mouvement latéral ou vertical par rapport au ski.In the preferred embodiment which is shown in Figures 1 and 2, the plate 15 has in its central part oblong orifices 30 which are oriented in a longitudinal direction, and which are distributed over the surface of the plate. These orifices 30 pass right through the plate. They are shouldered, and they cooperate with washers 31, which have an oblong shape of length less than that of the orifices 30, and of substantially equal width. The washers 31 are also shouldered. They are secured to the ski by any suitable means, for example by screws 32. The washers 31 have the function of guiding the plate 15 throughout its surface, allowing its movement in a longitudinal and horizontal direction, but prohibiting any other lateral or vertical movement with respect to the ski.

Ceci n'est pas limitatif et tout autre moyen approprié assurant un guidage longitudinal de la partie avant de la plaque convient, par exemple une glissière.This is not limiting and any other suitable means ensuring longitudinal guidance of the front part of the plate is suitable, for example a slide.

Egalement, de préférence, la cale 20 présente dans sa partie avant, sous la plaque 15, un évidement qui est comblé par une couche de matériau amortissant 33. Cette couche adhère à la cale 20 et à la surface inférieure de la plaque 15. Elle a pour fonction d'amortir les mouvements longitudinaux de l'extrémité avant de la plaque par rapport au ski, en se déformant en cisaillement.Also, preferably, the shim 20 has in its front part, under the plate 15, a recess which is filled with a layer of damping material 33. This layer adheres to the shim 20 and to the lower surface of the plate 15. It has the function of damping the longitudinal movements of the front end of the plate relative to the ski, by deforming in shear.

La couche 33 est par exemple constituée par un matériau amortissant qui présente des propriétés visco-élastiques.The layer 33 is for example constituted by a damping material which has viscoelastic properties.

L'évidement occupé par la couche 33 est de préférence situé en avant de l'embase 8 de l'élément de fixation avant 3. Toutefois, il peut se prolonger sous l'embase, le long du milieux de largeur de la plaque en laissant un contact direct entre les bords latéraux de la plaque et de la cale 20. Ainsi il y a une transmission directe des sollicitations et des ordres de conduite que le skieur donne au ski le long des bords latéraux de la cale en direction des carres.The recess occupied by the layer 33 is preferably located in front of the base 8 of the front fixing element 3. However, it can extend under the base, along the middle of the width of the plate, leaving direct contact between the lateral edges of the plate and of the cleat 20. Thus there is a direct transmission of the stresses and of the driving orders that the skier gives to the ski along the lateral edges of the cleat in the direction of the edges.

Egalement, selon le mode de réalisation qui est représenté dans la figure 1 et 2, une couche de matériau amortissant 35 est intercalée entre la plaque 15 et la surface supérieure du ski.Also, according to the embodiment which is represented in FIGS. 1 and 2, a layer of damping material 35 is interposed between the plate 15 and the upper surface of the ski.

La couche 35 est située principalement sous l'élément de fixation arrière 4, en particulier sous la plaque d'appui 13.The layer 35 is located mainly under the rear fixing element 4, in particular under the support plate 13.

Les efforts verticaux de la chaussure, au niveau du talon, transitent en partie par cette couche. L'autre partie des sollicitations est répartie vers l'avant et l'arrière de la plaque.The vertical forces of the shoe, at the heel, pass in part through this layer. The other part of the stresses is distributed towards the front and the back of the plate.

Plus la dureté de la couche 35 est élevée, plus la concentration des sollicitations sous le talon est élevée. Inversement, si la dureté de la couche 35 est faible, les sollicitations seront davantage réparties sous la surface de la plaque.The higher the hardness of layer 35, the higher the concentration of stresses under the heel. Conversely, if the hardness of the layer 35 is low, the stresses will be more distributed under the surface of the plate.

Cette couche 35 exerce donc un effet complémentaire de celui créé par les moyens de liaison.This layer 35 therefore exerts an effect complementary to that created by the connecting means.

En dynamique, la couche 35 permet un amortissement sous le talon des vibrations et des chocs, selon une direction verticale.In dynamics, the layer 35 allows damping under the heel of vibrations and shocks, in a vertical direction.

La figure 5 représente une variante de mise en oeuvre de l'invention, selon laquelle les moyens de liaison comprennent une ou plusieurs vis 40, qui traversent librement un orifice 41 du rebord 23, et qui sont vissés dans un orifice taraudé 42 de la cale 20. Entre le rebord 23 et la cale 20, la vis 40 porte un écrou ou éventuellement une bague 44, dont la position longitudinale est réglable. A l'extérieur du rebord 23, la vis 40 présente une tête 45, dont la position longitudinale est également réglable par vissage ou dévissage.FIG. 5 represents an alternative embodiment of the invention, according to which the connection means comprise one or more screws 40, which freely pass through an orifice 41 of the flange 23, and which are screwed into a tapped orifice 42 of the wedge 20. Between the rim 23 and the wedge 20, the screw 40 carries a nut or possibly a ring 44, the longitudinal position of which is adjustable. Outside the rim 23, the screw 40 has a head 45, the longitudinal position of which is also adjustable by screwing or unscrewing.

L'écrou 44 et la partie de la vis 40 située vers la cale 20 jouent un rôle semblable à celui des vis 24 et 25 précédentes. En d'autre termes, en partant d'une position de repos du ski, et d'une position d'appui par affleurement de l'écrou 44 contre le rebord 23, l'écrou 44 est déplacé longitudinalement en direction du rebord 23 d'une distance déterminée, pour exercer sur la plaque 15 une contrainte de traction en prenant appui sur la cale 20. Selon la position de l'écrou 44 le long de la vis 40, cette contrainte s'annule plus ou moins tôt lors d'une flexion du ski.The nut 44 and the part of the screw 40 situated towards the shim 20 play a role similar to that of the preceding screws 24 and 25. In other words, starting from a rest position of the ski, and from a support position by flushing of the nut 44 against the rim 23, the nut 44 is moved longitudinally in the direction of the rim 23 d 'a determined distance, to exert on the plate 15 a tensile stress by bearing on the shim 20. Depending on the position of the nut 44 along the screw 40, this stress is canceled more or less soon during bending of the ski.

Lorsque le ski est au repos, la tête 45 est dégagée vers l'avant par rapport au rebord 23. Au cours des flexions du ski, le rebord 23 est animé de mouvements longitudinaux relativement à la cale 20. En cas de flexion importante du ski, le rebord 23 vient prendre appui contre la tête 45, et se trouve alors retenu par cette tête. Les moyens de liaison génèrent donc dans la plaque une contrainte de compression et la plaque 15 agit alors sur le ski comme un raidisseur de sa zone centrale.When the ski is at rest, the head 45 is released forward with respect to the rim 23. During the bending of the ski, the rim 23 is driven in longitudinal movements relative to the wedge 20. In the event of significant bending of the ski , the rim 23 comes to bear against the head 45, and is then retained by this head. The connecting means therefore generate in the plate a compressive stress and the plate 15 then acts on the ski as a stiffener in its central area.

Par vissage et dévissage, la position longitudinale de la tête 45 par rapport au rebord 23 peut être ajusté, et de préférence, lorsque le ski est au repos, cette distance est supérieure au déplacement de l'écrou 44 qui a provoqué la précontrainte, mais elle est inférieure à l'amplitude du mouvement relatif entre le rebord 23 et la cale 20, qui se produit lors de fortes, ou de très fortes flexions de ski. Ainsi, en cas de survirage, la flexion du ski s'accentue, la tête 45 devient alors active et la plaque 15 se comporte comme un raidisseur, ce qui améliore momentanément les qualités de guidage du ski.By screwing and unscrewing, the longitudinal position of the head 45 relative to the rim 23 can be adjusted, and preferably, when the ski is at rest, this distance is greater than the displacement of the nut 44 which caused the preload, but it is less than the amplitude of the relative movement between the rim 23 and the wedge 20, which occurs during strong, or very strong ski flexions. Thus, in the event of oversteer, the flexion of the ski becomes more pronounced, the head 45 then becomes active and the plate 15 behaves like a stiffener, which momentarily improves the guide qualities of the ski.

La figure 6 illustre une variante de mise en oeuvre selon laquelle des rondelles de matériau amortissant 48 et 49 sont intercalées respectivement entre la tête 45 et le rebord 23, et entre l'écrou 44 et le rebord 23. Ces rondelles rendent plus progressifs les changements entre les différents modes d'action des moyens de liaison sur le ski.FIG. 6 illustrates an alternative embodiment according to which washers of damping material 48 and 49 are interposed respectively between the head 45 and the rim 23, and between the nut 44 and the rim 23. These washers make the changes more gradual between the different modes of action of the connecting means on the ski.

Naturellement, une seule rondelle, d'un côté ou de l'autre du rebord 23, pourrait être aussi utilisée.Naturally, a single washer, on one side or the other of the rim 23, could also be used.

Les moyens de liaison qui agissent entre la plaque 15 et le ski ne sont pas limités aux différents modes de réalisation qui ont été décrits.The connecting means which act between the plate 15 and the ski are not limited to the various embodiments which have been described.

Ainsi, les figures 7 et 8 illustre une variante de réalisation, selon laquelle la plaque 15a présente dans sa partie avant un orifice transversal 57. Cet orifice est limité vers l'avant et vers l'arrière par deux faces inclinées 51 et 52.Thus, FIGS. 7 and 8 illustrate an alternative embodiment, according to which the plate 15a has in its front part a transverse orifice 57. This orifice is limited towards the front and towards the rear by two inclined faces 51 and 52.

Une cale biseautée 53, dont la hauteur est réglée au moyen de vis 54 est située dans la partie avant de l'orifice 52. Cette cale biseautée agit sur la face inclinée 51, et induit sur la plaque 15a un effet semblable à celui des vis 24 et 25, ou celui de l'écrou 44.A beveled shim 53, the height of which is adjusted by means of screws 54 is located in the front part of the orifice 52. This beveled shim acts on the inclined face 51, and induces on the plate 15a an effect similar to that of the screws 24 and 25, or that of nut 44.

De la même façon, une cale biseautée 56 située en arrière de l'orifice 52 a une hauteur réglable au moyen de vis 50c . Lorsque le ski est au repos, la cale 56 est dégagée par rapport à la face inclinée 50 de l'orifice 52, mais elle est prévue pour engager cette face lors de fortes flexions du ski. Cette cale 56 joue le même rôle que la tête 45 des vis précédemment décrites. De préférence, l'inclinaison des faces 51 et 50 est prévue de telle façon que l'orifice 52 soit évasé vers le haut.Similarly, a beveled shim 56 located behind the orifice 52 has a height adjustable by means of screws 50c. When the ski is at rest, the wedge 56 is released relative to the inclined face 50 of the orifice 52, but it is provided to engage this face during strong bending of the ski. This wedge 56 plays the same role as the head 45 of the screws previously described. Preferably, the inclination of the faces 51 and 50 is provided in such a way that the orifice 52 is flared upwards.

Naturellement, la présente description n'est donnée qu'à titre indicatif, et l'on pourrait adopter d'autres mises en oeuvre de l'invention sans pour autant sortir du cadre de celle ci.Naturally, the present description is given for information only, and other implementations of the invention could be adopted without departing from the scope thereof.

Claims (14)

Dispositif interface entre un ski et des éléments de fixation avant et arrière (3, 4) qui sont destinés à retenir les extrémités d'une chaussure sur le ski, les éléments de fixation étant situés dans une zone centrale du ski, et comprenant chacun une embase (8, 12) par laquelle ils sont reliés au ski, le dispositif comprenant une plaque longiligne (15,15') dont chaque extrémité est reliée au ski, la plaque présentant vers chacune de ses extrémités une zone de montage (15a, 15b) pour recevoir de façon solidaire les éléments de fixation, une extrémité de la plaque dite première extrémité (16) étant assemblée au ski de façon solidaire, l'autre extrémité, dite seconde extrémité étant mobile par rapport au ski, et pouvant se déplacer relativement au ski selon une seule direction longitudinale lors des mouvements de flexion du ski, caractérisé par le fait que la plaque (15) est rigide en flexion et sensiblement plane, qu'elle s'étend au dessus de la surface supérieure du ski, parallèlement à celle-ci, et que des moyens de liaison (22,23,24,25,40,53,56,54,57) agissant selon une direction longitudinale contraignent la plaque (15, 15') en traction en prenant appui sur le ski, et par réaction le ski en compression dans la zone de la plaque au niveau de sa surface supérieure.Interface device between a ski and front and rear binding elements (3, 4) which are intended to retain the ends of a boot on the ski, the binding elements being located in a central zone of the ski, and each comprising a base (8, 12) by which they are connected to the ski, the device comprising a slender plate (15,15 '), each end of which is connected to the ski, the plate having, towards each of its ends, a mounting zone (15a, 15b ) to receive the fastening elements in an integral manner, one end of the plate called the first end (16) being assembled to the ski in an integral manner, the other end, called the second end being movable relative to the ski, and being able to move relatively skiing in a single longitudinal direction during flexion movements of the ski, characterized in that the plate (15) is rigid in flexion and substantially planar, that it extends above the board ace upper ski, parallel to it, and that connecting means (22,23,24,25,40,53,56,54,57) acting in a longitudinal direction constrain the plate (15, 15 ') in traction by resting on the ski, and by reaction the ski in compression in the region of the plate at its upper surface. Dispositif selon la revendication 1, caractérisé par le fait que les moyens de liaison (22,23,24,25,40) sont indéformables et agissent par poussée et par appui entre le ski ou un élément solidaire du ski et l'extrémité libre de la plaque ou un élément solidaire de la plaque.Device according to claim 1, characterized in that the connecting means (22,23,24,25,40) are undeformable and act by pushing and pressing between the ski or an element integral with the ski and the free end of the plate or an element integral with the plate. Dispositif selon la revendication 2, caractérisé par le fait que les moyens de liaison comprennent une butée d'appui (24,25,44) réglable en position selon une direction longitudinale exerçant une contrainte en compression sur la plaque (15) par poussée et par appui selon une direction longitudinale le ski (1) ou un élément (20) solidaire du ski et l'extrémité libre (23) de la plaque ou un élément solidaire de la plaque.Device according to claim 2, characterized in that the connecting means comprise a support stop (24,25,44) adjustable in position in a longitudinal direction exerting a compressive stress on the plate (15) by pushing and by support in a longitudinal direction the ski (1) or an element (20) integral with the ski and the free end (23) of the plate or an element integral with the plate. Dispositif selon la revendication 1, caractérisé par le fait que les moyens de liaison comprennent une butée (24,25,53) portée par l'un des éléments de support que sont le ski, un cale solidaire du ski, l'extrémité libre de la plaque, ou une cale solidarisée à la plaque, en appui simple selon une direction longitudinale contre la zone d'appui de l'un des éléments d'appui que sont une cale solidarisée au ski, une cale solidarisée à la plaque, le ski, un cale solidaire du ski, ou l'extrémité libre de la plaque, que la zone d'appui de l'élément d'appui est décalée en hauteur par rapport à la surface supérieure du ski, de telle façon que la butée exerce une pression par appui sur le dit élément, pression qui varie avec le mouvement relatif entre l'extrémité libre de la plaque et le ski, c'est à dire avec la flexion du ski.Device according to claim 1, characterized in that the connecting means comprise a stop (24,25,53) carried by one of the support elements that are the ski, a wedge integral with the ski, the free end of the plate, or a wedge secured to the plate, in simple support in a longitudinal direction against the support zone of one of the support elements that are a wedge secured to the ski, a wedge secured to the plate, the ski , a wedge integral with the ski, or the free end of the plate, that the support zone of the support element is offset in height relative to the upper surface of the ski, so that the stop exerts a pressure by pressing on said element, pressure which varies with the relative movement between the free end of the plate and the ski, ie with the flexing of the ski. Dispositif selon la revendication 4, caractérisé par le fait que partant d'une position d'appui sans contrainte de la butée contre l'élément d'appui, le ski étant au repos, la butée (24,25,53) est décalée par rapport à son support selon une direction longitudinale en direction de l'élément d'appui d'une distance "A" inférieure à l'amplitude du mouvement relatif entre l'élément d'appui et l'élément de support lors de flexions du ski d'amplitude définie, de telle façon que la butée exerce sur l'élément d'appui une contrainte de poussée qui s'annule au delà d'une flexion déterminée du ski, annulant ainsi la précontrainte que les moyens de liaison exercent sur la plaque et sur le ski.Device according to Claim 4, characterized in that, starting from an unconstrained support position of the stop against the support element, the ski being at rest, the stop (24,25,53) is offset by relationship to its support in one direction longitudinal towards the support element by a distance "A" less than the amplitude of the relative movement between the support element and the support element during bending of the ski of defined amplitude, such so that the abutment exerts on the support element a thrust stress which is canceled beyond a determined flexion of the ski, thus canceling the prestress that the connecting means exert on the plate and on the ski. Dispositif selon la revendication 5, caractérisé par le fait que les moyens de liaison comprennent une seconde butée (45,56) portée par l'un des éléments de support que sont le ski, un cale solidaire du ski, l'extrémité libre de la plaque, ou une cale solidarisée à la plaque, en appui simple selon une direction longitudinale contre la zone d'appui de l'un des éléments d'appui que sont une cale solidarisée au ski, une cale solidarisée à la plaque, le ski, un cale solidaire du ski, ou l'extrémité libre de la plaque, que la zone d'appui de l'élément d'appui est décalée en hauteur par rapport à la surface supérieure du ski, et que partant d'une position d'appui sans contrainte de la seconde butée contre son élément d'appui, le ski étant au repos, la butée (45,56) se trouve décalée par rapport à son support dans la direction opposée à l'élément d'appui d'une distance "B" supérieure à la distance "A" et inférieure à l'amplitude du mouvement relatif entre l'élément d'appui et l'élément de support lors de flexions du ski de forte amplitude , de telle façon que la butée exerce sur l'élément d'appui une contrainte de poussée qui prend naissance à partie d'une amplitude déterminée de flexion supérieure ou au plus égale à l'amplitude précédente.Device according to claim 5, characterized in that the connecting means comprise a second stop (45,56) carried by one of the support elements that are the ski, a wedge integral with the ski, the free end of the plate, or a wedge secured to the plate, in simple support in a longitudinal direction against the support zone of one of the support elements that are a wedge secured to the ski, a wedge secured to the plate, the ski, a wedge integral with the ski, or the free end of the plate, that the support zone of the support element is offset in height relative to the upper surface of the ski, and that starting from a position of support without constraint of the second stop against its support element, the ski being at rest, the stop (45,56) is offset relative to its support in the direction opposite to the support element by a distance "B" greater than distance "A" and less than the amplitude of the relative movement between e the support element and the support element during flexions of the ski of high amplitude, so that the stop exerts on the support element a thrust stress which arises from a determined amplitude greater than or at most equal to the previous amplitude. Dispositif selon la revendication 5, caractérisé par le fait que la première butée (44) présente un bloc amortissant (49) situé entre l'élément de portée et l'élément d'appui de la première butée.Device according to claim 5, characterized in that the first stop (44) has a damping block (49) located between the bearing element and the support element of the first stop. Dispositif selon la revendication 6, caractérisé par le fait que la seconde butée (45) présente un bloc amortissant (48) situé entre l'élément de portée et la zone d'appui de la seconde butée.Device according to claim 6, characterized in that the second stop (45) has a damping block (48) located between the bearing element and the support zone of the second stop. Dispositif selon la revendication 4, caractérisé par le fait que sur une partie de la longueur de la plaque (15), l'intervalle entre la plaque (15) et la surface supérieure du ski est comblée par une couche (35) de matériau amortissant.Device according to claim 4, characterized in that over a part of the length of the plate (15), the gap between the plate (15) and the upper surface of the ski is filled with a layer (35) of cushioning material . Dispositif selon la revendication 5, caractérisé par le fait que dans la zone de l'extrémité libre de la plaque, il présente une cale rigide (20), intercalée entre la plaque (15) et le ski, solidarisée au ski, que la cale présente une face d'appui (22) transversale située en deçà de l'extrémité libre de la plaque, et que au delà de la face d'appui transversale de la cale, la plaque présente un rebord (23) orienté en direction du ski, et que les moyens de liaison comprennent un élément fileté (24,25) engagé dans un orifice taraudé de la plaque, se terminant par une butée d'appui dirigée contre la face transversale (22) de la cale solidaire du ski et prenant appui contre celle-ci.Device according to claim 5, characterized in that in the region of the free end of the plate, it has a rigid block (20), interposed between the plate (15) and the ski, secured to the ski, that the block has a transverse bearing face (22) located below the free end of the plate, and that beyond the transverse bearing face of the wedge, the plate has a flange (23) oriented towards the ski , and that the connecting means comprise a threaded element (24,25) engaged in a threaded orifice of the plate, ending in a support stop directed against the transverse face (22) of the wedge integral with the ski and taking support against it. Dispositif selon la revendication 5, caractérisé par le fait que dans la zone de l'extrémité libre de la plaque, il présente une cale rigide (20), intercalée entre la plaque et le ski, solidarisée au ski, que la cale présente une face transversale située en deçà de l'extrémité libre de la plaque, et que au delà de la face d'appui transversale de la cale, la plaque présente un rebord (23) orienté en direction du ski, et que les moyens de liaison comprennent un élément fileté (40) encastré dans la cale (20) au niveau de sa face transversale, orienté vers le rebord (23) de la plaque, et présentant une première butée d'appui (44) située en deçà du rebord.Device according to claim 5, characterized in that in the region of the free end of the plate, it has a rigid block (20), interposed between the plate and the ski, secured to the ski, that the block has a face transverse located below the free end of the plate, and that beyond the transverse bearing face of the wedge, the plate has a flange (23) oriented towards the ski, and that the connecting means comprise a threaded element (40) embedded in the shim (20) at its transverse face, oriented towards the flange (23) of the plate, and having a first support stop (44) located below the flange. Dispositif selon la revendication 10, caractérisé par le fait que les moyens de liaison traversent librement le rebord (23) de la plaque et présentent une seconde butée (45) située au delà du rebord (23) de la plaque.Device according to claim 10, characterized in that the connection means pass freely through the rim (23) of the plate and have a second stop (45) situated beyond the rim (23) of the plate. Ensemble d'organes de retenue d'une chaussure en appui contre un ski, comprenant des éléments de retenue (2,3) aptes à retenir la semelle de chaussure, caractérisé par le fait qu'il comprend un dispositif interface (14) selon l'une quelconque des revendications précédentes.Set of shoe retaining members resting against a ski, comprising retaining elements (2,3) capable of retaining the shoe sole, characterized in that it comprises an interface device (14) according to the 'any of the preceding claims. Ski destiné à la pratique du ski alpin, caractérisé par le fait qu'il est équipé d'un dispositif interface (14) selon l'une quelconque des revendications précédentes 1 à 12.Ski intended for alpine skiing, characterized in that it is equipped with an interface device (14) according to any one of the preceding claims 1 to 12.
EP94103763A 1993-05-06 1994-03-11 Interface between ski and bindings Ceased EP0623370A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9305610 1993-05-06
FR9305610A FR2704766B1 (en) 1993-05-06 1993-05-06 Interface device between a ski and binding elements.

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EP0623370A1 true EP0623370A1 (en) 1994-11-09

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EP94103763A Ceased EP0623370A1 (en) 1993-05-06 1994-03-11 Interface between ski and bindings

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EP (1) EP0623370A1 (en)
JP (1) JPH07124284A (en)
FR (1) FR2704766B1 (en)

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US6244616B1 (en) 1998-11-13 2001-06-12 Salomon S.A. Interface device between a boot and an alpine ski

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FR2654635A1 (en) * 1989-11-22 1991-05-24 Salomon Sa Device for mounting a boot on a ski
EP0492658A1 (en) * 1990-12-27 1992-07-01 Marker Deutschland GmbH Ski with a system for influencing its stiffness
WO1993001869A1 (en) * 1991-07-17 1993-02-04 Salomon S.A. Device for altering the pressure distribution of a ski on the gliding surface thereof

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WO2000006265A1 (en) * 1996-07-30 2000-02-10 Bronson Henry D Ski binding dampening assembly
EP0880981A1 (en) 1997-05-30 1998-12-02 Salomon S.A. Interface device between a ski boot and a ski
US6193262B1 (en) 1997-05-30 2001-02-27 Salomon S.A. Interface device between a boot and alpine ski
US6244616B1 (en) 1998-11-13 2001-06-12 Salomon S.A. Interface device between a boot and an alpine ski

Also Published As

Publication number Publication date
FR2704766B1 (en) 1995-07-28
FR2704766A1 (en) 1994-11-10
US5683095A (en) 1997-11-04
JPH07124284A (en) 1995-05-16

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