EP0409749A1 - Complementary device for the ski permitting the assembly of a pair of skibindings on a ski - Google Patents

Abstract

Device comprising a plate (5) which, receiving the pair of bindings, is positioned at a distance from the upper face of the ski without possibility of movement in the direction lateral to the ski. <??>According to the invention, the plate (5) is associated with means (9, 10) permitting its displacement longitudinally to the ski, against the action of at least one elastic support (13) on each of its ends. <??>Application to the fitting-out of alpine skis. <IMAGE>

Description

The present invention relates to a device complementary to skiing allowing the mounting of a set of bindings of a boot on a ski.

Traditionally, a shoe is attached to an alpine ski using a set of safety bindings comprising a stop located at the front of the shoe and a heel located at the rear thereof, the shoe whose sole is rigid being pinched elastically between the stop and the heel.

A first observation which is essential is that the ski area between the stop and the heel for fixing the boot is, in conditions of use, stiffened by the boot. In addition, the longitudinal thrust force of the heel piece of the bindings on the boot tends to increase the camber of the ski.

It is therefore regrettable for ski manufacturers who carry out very detailed studies of the behavior of skis when designing them to see this behavior modified due to the different methods of fixing the boot to the ski.

Furthermore, it has been imagined, in order to improve the precision of the turns, to reduce the width of the skis, in particular in the area of the skate. Because of this reduction in width, a ski boot overflows even more on either side of the two side edges of the ski. Consequently, when taking an edge, especially on a steep slope, the maximum angulation is reduced and is limited by the support that the shoe takes on the snow. It may, in this case, result in friction of the outer lateral part of the boot located on the upstream ski. To remedy this defect which is likely to result in a fall of the skier, it has been imagined to raise the boot to find the maximum edge grip angle allowed with skis of greater width. The means envisaged are various and can be a setting of the base of the ski bindings, or an enhancement of the binding and boot assembly by interposition between the boot and the ski of a plate which can also serve as a vibration damper. , as described in document CA 1 215 403.

A number of solutions have also been proposed. either on the structure of the ski, or on the structure of the bindings, or on the ski boots, or on the interfaces between these different elements to improve the behavior of a ski, to take account of the technical development of the skis which are become, with equal performance, easier to handle, and less tiring to use for skiers.

To obtain such a result, in addition to changes in structure, construction, choice of materials, technical characteristics, dimensioning and flexibility distribution, an important factor was the selective elimination of certain ranges of harmful vibrations, as described in patents FR 2,476,495 and FR 2,575,393 in the name of the Applicant.

It was also imagined to bring plates on the skis to meet other needs. Thus, in order to improve comfort and safety by eliminating micro-trauma due to large shocks received by the legs of a skier during the passage of piles of hard snow or very close bumps forming undulations very hard, it has been imagined to insert between the ski and each foot of the skier a kind of "elastic suspension" in the form of an elastic plate, of the leaf spring type, as described in the patents FR 2 347 066 and 2 338 720, or in the form of an elastic plate mounted on coil springs or on elastic buffers as described in documents FR 2 409 776, WO 86/04824, DE 2 259 375, and CA 1 215 403.

Document WO 83/03360 for its part describes a plate carrying the bindings of the boot, the ends of which are fixed to the ski, and which delimits with the latter a space filled with a shock absorbing material. Document EP 0 182 776 describes a plate whose support on the ski is produced in two zones. Document US Pat. No. 3,797,844 describes a plate for mounting the bindings, one end of which is fixed to the ski and the other of which has the possibility of sliding with respect to the ski.

It has also been imagined to fix on the ski a plate intended to correct morphological malformations of the skier, such as for example a difference in length of the two legs, or articulation problems, as described in the German patent DE 3,710,092.

It has also been proposed to use plates to locally reinforce a ski, in particular in torsion as described in US Pat. No. 3,326,564.

Another use of a distribution plate has been envisaged to correct the position of application of the force due to the weight of the skier, generally located at the level identified on the ski by the position of the middle of the boot, so that this plate, fixed to the ski at the front set at the rear of the skate breaks down the mass of the skier into two forces applied at the level of the front quarter and at the level of the rear quarter of the ski, as described in US Patents 3,260,532 and FR 81.07062 .

In fact, this solution, rather than improving the behavior of the ski, has turned out to be rather unfavorable insofar as, by reducing the efficiency of the edge grip, because the peaks of pressure distribution on the snow are badly positioned. , turns become more difficult to initiate and drive.

The object of the invention is to provide a device complementary to skiing, studied and adapted in such a way that it plays a positive role in the behavior of skiing on snow by favorably modifying its operation in terms of rigidity in bending and torsion.

The object of the invention is to provide a device comprising a support plate for the set of shoe bindings, which allows
- the ski to deform regularly over its entire length, under conditions of use, with the least possible stress,
- an increase in the shoe, possibly adjustable, to improve the efficiency of the edge grip,
- an adjustable longitudinal and lateral positioning of the boot-binding assembly relative to the ski,
- interchangeability of the fitting of shoes of different sizes, without having to use special "rental" fasteners,
- possibly the adaptation of a ski to the morphological defects of a skier,
- and which facilitates the mounting of the fasteners as well as the anchoring thereof.

To this end, the device which it concerns, of the type comprising a plate which, receiving the set of bindings, is positioned at a distance from the upper face of the ski, without the possibility of movement in the direction lateral to the ski, is characterized in that that the plate is associated with means allowing its displacement longitudinally on the ski, against the action of at least one elastic support on each of its ends.

According to a simple embodiment of this device, it comprises at least one slide which, fixed on the ski and oriented longitudinally thereto, allows sliding mounting and at a distance from the upper plane of the ski, of the equipped plate of the set of bindings, and two stops which, fixed on the ski, are each intended to provide elastic support to the front and rear ends of the plate.

The plate being disposed above the upper plane of the ski, raises the boot compared to the case where it rests directly on the ski.

In addition, this plate, which is movable longitudinally against elastic means, leaves a free play to the deformations of the ski when it is in use.

Finally, this plate is mounted in a removable and interchangeable manner, which makes it possible to replace it almost instantaneously with another plate of different characteristics, or fitted with bindings intended for another ski size.

The elastic supports may consist of a visco-elastic material associated with the stops against which the plate bears, or by other elastic supports, such as coil or leaf springs.

According to the embodiments, the elastic supports can be prestressed definitively or equipped with means for adjusting the prestress, by modifying the axial position of the stops or by displacement of a support member on the plate or on a elastic element associated with one or other of the stops.

The slides carrying the plate can be mounted in an adjustable manner longitudinally, laterally, or even be equipped with shims for adjusting their height.

A pad of visco-elastic material interposed locally between the plate and the ski makes it possible to dampen parasitic vibrations. Finally, insofar as the fixing locations on the ski, of the slides and / or of the stops of the plate are predetermined, it is possible to pre-drill the holes intended for fixing by screwing of these elements in the factory.

According to other characteristics of the invention, the complementary ski plate can be made of aluminum alloy, of laminated material of glass fibers, of carbon, aramid (KEVLAR) or mixed, with an epoxy matrix, of alloy d laminate aluminum, in a sand thin wich comprising a visco-elastic material: zicral-visco-elastic, laminate-visco-elastic, zicral-visco-elastic-laminate. In addition, this plate can be ribbed. Finally, the abutments of the plate can be part of the structure of the ski.

According to another embodiment of this device, the height of the guide zones of each slide is greater than the thickness of the parts of the plate guided in these zones, and at least one element of visco-elastic material is supported by on the one hand against the underside of the plate and on the other hand against each slide.

The visco-elastic material thus constitutes one of the bearing surfaces of the plate during its longitudinal sliding movement. It ensures the sliding of the plate even if there is a certain inclination of the latter with respect to the slides. Thanks to the compressibility of the visco-elastic material, the risks of jamming are limited.

The visco-elastic material can be interposed between each slide and the plate at the level of the guide zones of each slide serving to guide the plate, or else be interposed between each slide and the plate, between the base of the slide fixed on the ski and the underside of the plate, or be arranged in these two arrangements. In the latter hypothesis, the visco-elastic material located on each guide zone of each slide is of greater hardness than that of the visco-elastic material placed between the plate and the base of the slide.

The layer of visco-elastic material covering each guide zone of the slides forms a damped end stop.

The visco-elastic material interposed between the plate and the base of each slide can be in the form of strips, in the form of studs, or in the form of balls housed in a cage.

It is advantageous to adapt the characteristics of the visco-elastic material to the weight of the skier, as well as to the technique of the skier. This adaptation can be carried out by varying the hardness of the material, the shape of the elements made of visco-elastic material, or the contact surface between them and the support plate of the fasteners.

It is possible to adapt the number of elements to the characteristics of the skier, therefore to modify the hardness of the damping, for example by having strips of pre-cut visco-elastic material, and carrying marks indicating what is the strip length. predictable in this or that case. Insofar as these are studs, it is possible to vary the number of studs interposed between each slide and the fixing support plate.

According to another characteristic of the invention, the surface of each visco-elastic element, considered parallel to the plate, increases from the upper face of this element towards the lower face of the latter. It is thus possible to have a progressive reaction of each element of visco-elastic material as a function of the compressive strength.

Advantageously, for this purpose, each visco-elastic element has, in cross section, a trapezoidal section.

According to another possibility, each visco-elastic element has several zones vertically offset from each other in the manner of steps.

In the latter case, the more the compressive force on the visco-elastic material will increase, the greater the active surface of the element.

In order to promote the sliding capacity of the fixing support plate vis-à-vis the elements of visco-elastic material, each visco-elastic element consists of a composite part comprising a flexible part on the side of the base of the slide and a part with sliding surface on the side of the plate.

In order to properly fulfill the function assigned to it, the visco-elastic material has a hardness of between 40 and 80 shores A.

According to another characteristic of the invention, the value of the overhang of the plate with respect to the upper plane of each slide is greater than the value of the vertical clearance of the plate in the slides. This arrangement avoids that, during compression of the elements of visco-elastic material, the underside of the ski boot comes to bear on the upper wings of the slides and thus disturb the proper functioning of the device.

• Figure 1 est une vue en perspective d'un ski alpin équipé de ce dispositif ;
• Figure 2 est une vue de côté et à échelle agrandie de la partie centrale du ski de figure 1 ;
• Figure 3 en est une vue de dessus, le système de fixation de la chaussure étant représenté en traits mixtes ;
• Figure 4 en est une vue en coupe transversale et à échelle agran­die, selon la ligne IV-IV de figure 2, le positionnement traditionnel d'une chaussure étant représenté en traits mixtes ;
• Figure 5 est une vue en coupe longitudinale et à échelle agrandie d'une variante du dispositif de figure 2, sans système de fixation de la chaussure ;
• Figure 6 est une vue en coupe longitudinale et à échelle agrandie d'une autre variante d'exécution du dispositif de figure 2 ;
• Figures 7 et 8 sont deux vues en coupe longitudinale de variantes d'exécution du dispositif de figure 2 avec réglage de la précontrainte élastique exercée sur la plaque ;
• Figures 9 et 10 sont deux vues respectivement de côté et de dessus d'un ski équipé d'un autre dispositif ;
• Figure 11 est une vue en coupe transversale de ce ski, à échelle agrandie, selon la ligne XI-XI de figure 10 ;
• Figures 12 et 13 sont deux demi-coupes transversales similaires à figure 3 correspondant à deux autres formes d'exécution de ce dispositif ;
• Figure 14 est une vue partielle en coupe longitudinale de ce dispositif au niveau d'un élément visco-élastique.

In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawing, representing, by way of nonlimiting examples, several embodiments of this device:

• Figure 1 is a perspective view of an alpine ski equipped with this device;
• Figure 2 is a side view on an enlarged scale of the central part of the ski of Figure 1;
• Figure 3 is a top view, the shoe fastening system being shown in phantom;
• Figure 4 is a cross-sectional view on an enlarged scale, along the line IV-IV of Figure 2, the traditional positioning of a shoe being shown in phantom;
• Figure 5 is a longitudinal sectional view on an enlarged scale of a variant of the device of Figure 2, without the shoe fastening system;
• Figure 6 is a longitudinal sectional view on an enlarged scale of another alternative embodiment of the device of Figure 2;
• Figures 7 and 8 are two views in longitudinal section of alternative embodiments of the device of Figure 2 with adjustment of the elastic preload exerted on the plate;
• Figures 9 and 10 are two views respectively from the side and from above of a ski equipped with another device;
• Figure 11 is a cross-sectional view of this ski, on an enlarged scale, along the line XI-XI of Figure 10;
• Figures 12 and 13 are two transverse half-sections similar to Figure 3 corresponding to two other embodiments of this device;
• Figure 14 is a partial view in longitudinal section of this device at a visco-elastic element.

FIG. 1 represents an alpine ski 2 on which the boot of a skier is fixed by means of a fastening system comprising, in a manner known per se, a front stop 3 and a heel piece 4. The fastening system 3 , 4 is not mounted directly on the ski as is usually the case, but on a plate 5 of rectangular shape, of length slightly greater than the cumulative length of the boot, the toe 3 and the heel 4. The plate 5 which is made of a material having good mechanical strength, for example a light alloy, is mounted on the ski 2 by means of two slides 6, in the embodiments shown in the drawing. The two slides 6 which are rigidly fixed on the ski, are oriented longitudinally thereto, and allow the engagement of the plate 5 by longitudinal sliding. The two slides 6 whose length is variable and between 2 and 15 cm are arranged substantially at the front stop 3 and the heel 4.

It follows from this assembly that the plate 5 equipped with the fixing system is raised relative to the upper plane of the ski. As shown more particularly in FIG. 4, each slide 6 is fixed to the ski by means of screws 7 which pass through elongated holes in the direction transverse to the ski. This allows a lateral adjustment of the position of each slide, in order to offset the plate 5 more or less laterally, or even form with the longitudinal axis of the latter an angle with the longitudinal axis of the ski, depending on the type of behavior sought by the skier.

It also appears from FIG. 4 that the elevation of the fixing system makes it possible to increase the edge grip angle compared to a traditional assembly. Indeed, if in the case of a traditional assembly, that is to say the binding system being fixed directly on the ski, the permissible edge grip angle before the boot 8 takes support on the snow has a value A, taking into account the enhancement provided by the slides and the plate 5, this angle, in the case of the device according to the invention, designated by the reference B in FIG. 4, has a value greater than that of A.

It is also possible, not shown in the drawing, to have slides of different thicknesses, or to associate with the slides 6 wedges of different heights to adapt the ski to the conditions of use sought by the skier, or take account the morphology of the latter, such as malformation or difference in length of the two legs.

In the embodiment shown in Figures 2 and 3, the device according to the invention comprises two stops 9 and 10 forming part of the ski or fixed to the ski by screwing, the stop 9 being disposed at the front end of the plate 5 and the stop 10 being arranged at the rear end of the plate 5. Each of the two stops 9, 10 comprises a slot 12 parallel to the plane of the upper face of the ski, opening out respectively towards the rear for the stop 9 and towards the front for the stopper 10. Each of these slots 12 is filled over a part of its depth by a visco-elastic material 13. The front and rear edges of the plate 5 are supported inside the slots 12 against the material visco-elastic.

An assembly of the plate is thus carried out with immobilization transverse and in the height direction relative to the ski, but with the possibility of longitudinal movement against the action of the elastic means constituted by the visco-elastic material 13.

It should be noted that the mechanical characteristics of the plate 5 are advantageously taken into account when designing the ski. In addition, given its mounting floating longitudinally on the ski, the plate 5 does little disturb the deformation of the ski, all the parts of the latter working on the deformation in the same way, unlike traditional skis in which the part located at the level of the skier's shoe is blocked by it. It is also interesting to note that it is possible, on the same type of ski, to adapt different types of plates of mechanical characteristics, themselves different, each type of plate giving the same type of ski a specific behavior. A skier can therefore associate with a specific ski the type of plate which is most suited to the behavior of the ski which he wishes to obtain.

It is also possible to influence the behavior of the ski by playing either on the preload of the elastic means forming stops for the plates or also by moving the plate longitudinally. To this end, in the embodiment shown in FIG. 5, in which the same elements are designated by the same references as above, the stops 9, 10 are fixed to the ski by means of screws 14 engaged in elongated lights 15 oriented longitudinally when skiing. It is therefore possible, thanks to this arrangement, on the one hand to adjust the position of a given plate longitudinally, and on the other hand to adjust the preload of the viscoelastic elements 13.

It is also possible, insofar as the clearance at the lights 15 of the stops 9.10 is sufficient, to mount between the two stops 9.10 plates of different lengths always with the aim of adapting the behavior of the ski to the behavior sought by the user.

FIG. 6 represents an alternative embodiment of this device in which the two abutments of the plate 5 are constituted by two leaf springs 16 fixed to the ski by screws 17.

Figure 7 shows another variant of this device in which one of the stops corresponds to the stop 10 of the 'embodiment Figures 2 to 5, while the other stop 18 is a rigid stop comprising a support finger 19 against one of the end edges of the plate 5, the axial position of this finger 19 being adjustable by a nut 20. The pressure exerted by the finger 19 against an edge of the plate makes it possible to adjust the preload of the visco-elastic material 13 associated with the stop 10.

FIG. 8 shows another alternative embodiment of this device comprising a stop 22 fitted with a rod resort 23 bearing against an end edge of the plate 5, the tension of this spring 23 being adjustable by a plug 24 screwed inside the body of the stop 22.

As shown in the drawing, in FIG. 2, this device can finally comprise a blade 25 made of a visco-elastic material, disposed between the plate 5 supporting the set of bindings, and the upper face of the ski. This blade of visco-elastic material, without disturbing the deformation movements of the ski, has a damping of the combined vibratory movements of the ski body and of the plate 5, which improves the comfort of the skier and the precision of the ski handling. .

In all the embodiments which have just been described, the fixing of the slides 6 and of the stops 9, 10, 16, 18 and 22 is carried out by means of screws which can be engaged either in holes made during the mounting the binding, either in pre-drilled holes in the factory during the manufacture of the ski with possible installation of inserts. This last solution is very interesting because it limits the work of the operators who mount the binding and ensure perfect positioning of the holes, without the risk of seeing them formed in a place which risks weakening the structure of the ski.

It should also be emphasized that this device is advantageous for the rental of skis because allowing, by interchangeability of the plates, the mounting on the same ski of fixing systems adapted to different shoe sizes, without requiring recourse, as is the case. Usually, to fastening systems with large adjustment ranges.

FIG. 9 represents a ski 102 equipped with two stops 103 and 104 respectively presenting slots 105 and 106 turned towards the rear and the front, the bottom of which is filled with a layer of visco-elastic material.

On the ski are fixed two double slides 107 oriented longitudinally. In the slides is engaged a plate 108 whose ends are supported inside the stops 103 and 104 against the visco-elastic material that these comprise.

As described above, the plate 108 is equipped with a fixing stop 109, and a fixing heel 110 intended to grip an elastic boot.

FIG. 11 represents a first embodiment of the device according to the invention. The slide 107 has two longitudinal guide zones 113 opening one opposite the other, the height of each guide zone 113 being greater than the height of the edge 114 of the plate 108 which is intended to be engaged therein. Each guide zone 113 is filled, in its lower part, with a layer of visco-elastic material of hardness between 40 and 80 shores, bearing under the guided parts 114 of the plate.

In the embodiment shown in Figure 12, each slide is equipped with two strips 117 of visco-elastic material arranged longitudinally, and each bearing in a recess 115 formed in the base of the slide, which is the part of that -this fixed to the ski by screws 119. The guide zone of each groove 113 is coated with a layer 120 of visco-elastic material with a hardness greater than that of the material constituting the bands 117.

As shown in the drawing, there is a vertical clearance F of each edge 114 of the plate 108 inside a guide zone 113, this clearance F having a value less than the value E of the overhang of the upper plane of the plate 108 opposite the upper plane of the slide. This avoids, in the fully compressed position of the visco-elastic material, that the shoe 121 is supported by its lower face against the upper plane of the slide.

In the embodiment shown in Figure 13 in which the same elements are designated by the same references as above, the visco-elastic material interposed between the underside of the plate 108 and the base of each slide 118 is constituted by a plurality of studs 122 of trapezoidal shape, the small surface of each stud being located on the side of the plate 108, while its large surface is located in contact with the base 118 of the slide.

Figure 14 shows yet another embodiment in which each visco-elastic element is in the form of a strip 123 the upper face of which comprises successive recesses 124 in the form of steps.

In all of the embodiments shown in FIGS. 9 to 14 and which have just been described, when the ski deforms, under normal conditions of use, the plate 108 can slide freely, without the risk of jamming or disturbing its sliding inside the slides, taking into account the possibility of crushing the elements of visco-elastic material. The embodiments corresponding to FIGS. 13 and 14 allow the progressiveness of the reaction of each element of visco-elastic material as a function of the force resistant to compression.

It goes without saying that the invention is not limited to the sole embodiments of this device described above by way of examples; on the contrary, it embraces all its variants. It is thus in particular that the shape of the elements of visco-elastic material could be different, that these elements could be provided with precuts in order to achieve a modular mounting of these, or that several types of elements of shapes or different types could equip the same device, without departing from the scope of the invention.

Claims (33)

1 - Device complementary to the ski allowing the mounting of a set of bindings (3,4) of a boot on a ski (2), of the type comprising a plate (5) which, receiving the set of bindings, is positioned at distance from the upper face of the ski, without the possibility of movement in the direction lateral to the ski, characterized in that the plate (5) is associated with means (9,10) allowing its displacement longitudinally on the ski, against the action of at least one elastic support (13) on each of its ends. 2 - Device according to claim 1, characterized in that it comprises at least one slide (6) which, fixed on the ski and oriented longitudinally thereto, allows a sliding mounting and at a distance from the upper plane of the ski, the plate (5) equipped with the set of fasteners (3,4) and two stops (9,10) which, fixed on the ski (2), are each intended to provide elastic support at the front and rear ends of the plate. 3 - Device according to claim 2, characterized in that each stop (9,10) comprises a slot parallel to the upper surface of the ski, opening on the side of the plate (5) so as to allow the engagement of an edge thereof, and filled over part of its depth with a visco-elastic material (13). 4 - Device according to claim 2, characterized in that at least one stop is equipped with a mechanical spring, with a coil (23) or with a blade (16). 5 - Device according to any one of claims 1 to 4, characterized in that the elastic support means of the plate are prestressed in a non-adjustable manner. 6 - Device according to any one of claims 1 to 4, characterized in that the elastic support means of the plate are equipped with an adjustment system (15,20,24) of their preload. 7 - Device according to any one of claims 1 to 4 characterized in that at least one of the two stops (9,10) front or rear of the plate is equipped with longitudinal adjustment means (14,15). 8 - Device according to claim 7, characterized in that at least one of the stops (9,10) is fixed to the ski (2) by screwing through elongated lights (15), oriented lengthwise ski. 9 - Device according to claim 6, characterized in that the means for longitudinally adjusting the ski of its part bearing against the plate, are integral with one of the stops (18, 22) mounted fixed on the ski. 10 - Device according to any one of claims to 9, characterized in that each slide (6) of the plate (5) is mounted in adjustable manner in height and / or in inclination on the ski. 11 - Device according to any one of claims 1 to 10, characterized in that each slide (6) of the plate is mounted in an adjustable manner laterally on the ski. 12 - Device according to any one of claims 1 to 11, characterized in that the fixing holes in the ski of each slide and / or each stop of the plate are pre-drilled during the manufacture of the ski, with placement possible inserts. 13 - Device according to any one of claims 1 to 12, characterized in that a pad (25) of visco-elastic material is interposed locally between the support plate of the set of bindings and the upper face of the ski. 14 - Device according to claim 1, characterized in that the complementary plate to the ski is made of aluminum alloy. 15 - Device according to claim 1, characterized in that the complementary ski plate is laminated with glass fibers, carbon fibers, kevlar fibers, or mixed, with an epoxy matrix. 16 - Device according to claim 1, characterized in that the complementary plate to the ski is a combination of aluminum alloy and laminate. 17 - Device according to claim 1, characterized in that the complementary ski plate is a thin sandwich comprising visco-elastic: zicral-visco-elastic, laminate-visco-elastic, zicral-visco-elastic-laminate. 18 - Device according to claim 1, characterized in that the complementary plate to the ski is ribbed. 19 - Device according to claim 1, characterized in that the stops (9, 10) are part of the ski structure. 20 - Device complementary to the ski, allowing the mounting of a set of bindings of a boot on a ski, according to claims 1 and 2, characterized in that the height of the guide zones (13) of each slide is greater than the thickness of the parts (14) of the plate guided in these zones (13), and in that at least one element made of visco-elastic material is supported on the one hand against the underside of the plate and on the other hand against each slide. 21 - Device according to claim 20, characterized in that the visco-elastic material interposed between each slide (107) and the plate (108) is in the form of strips (115) arranged on the underside of the guide zone ( 113) of each slide. 22 - Device according to any one of claims 20 and 21, characterized in that the visco-elastic material interposed between each slide (107) and the plate (108) is disposed between the base (118) of the slide fixed on the ski and the underside of the plate (108). 23 - Device according to claim 22, characterized in that the visco-elastic material (120) located on each guide zone (113) of each slide is of greater hardness than that of the visco-elastic material disposed between the plate (108) and the base (118) of the slide, and in that there is, at rest, a clearance F between the plate (108) and the visco-elastic material (120) housed in the guide zone of each slide. 24 - Device according to claim 22, characterized in that the visco-elastic material is in the form of strips (117). 25 - Device according to claim 22, characterized in that the visco-elastic material is in the form of studs (122). 26 - Device according to claim 22, characterized in that the visco-elastic material is in the form of balls housed in a cage. 27 - Device according to any one of claims 24 and 25, characterized in that the surface of each visco-elastic element, considered parallel to the plate, increases from the upper face of this element towards the lower face of the latter. 28 - Device according to claim 27, characterized in that each visco-elastic element (122) has, in cross section, a trapezoidal section. 29 - Device according to claim 27, characterized in that each visco-elastic element (123) has several zones vertically offset from each other in the manner of steps (124). 30 - Device according to any one of claims 20 to 29, characterized in that each visco-elastic element consists by a composite part comprising a flexible part on the side of the base of the slide and a part with sliding surface on the side of the plate. 31 - Device according to any one of claims 20 to 30, characterized in that the visco-elastic material has a hardness between 40 and 80 shores A. 32 - Device according to any one of claims 20 to 31, characterized in that it comprises several elements of visco-elastic material of different characteristics: shape and / or hardness and / or surface. 33 - Device according to any one of claims 20 to 32, characterized in that the value of the overhang (E) of the plate (8) relative to the upper plane of each slide (7) is greater than the value of the vertical clearance (F) of the plate (8) in the slides.

Images