EP3184156B1 - Ski binding - Google Patents

Description

The present invention relates to an abutment before attaching a boot to a gliding board adapted for the practice of ski touring.

During the practice of ski touring, the climbing phases require a fixation of the ski boot functionally very different from the downhill phases. This results in requirements in terms of safety and holding of the binding and kinematics of the shoe variable from one phase to another. Thus, during the descent, the binding must ensure a very good support of the boot on the ski with, preferably, triggering the binding in case of a fall so as not to hurt the skier. When climbing, it is necessary to allow a rotation of the boot around a transverse axis substantially at the front of the sole of the shoe. The shoe is therefore not immobilized with respect to the ski and there is no need to trigger the attachment uphill.

Many bindings have been designed specifically for the descent. Often, these include a front stop incorporating a lateral release mechanism associated with the pivoting of wings for gripping the front of the shoe. Such a stop is thus described in the document FR-A-2,089,540 .

Regarding the climb, the forward stop described in the document EP-A-0 199 098 refers to the practice of ski touring. This solution comprises a shoe attachment mechanism defining a hinge axis around which pivots the front of the shoe during the climb.

Due to the different functional requirements when practicing ski touring, some manufacturers have developed front stops supporting two separate front shoe restraints. Thus, the skier can use a restraint adapted to each phase of his hike: ascent or descent. The document EP-A-2,626,116 illustrates this type of stop. This solution comprises a first forward restraint of the boot provided for the descent comprising two pivoting wings associated with a lateral release mechanism. The wings support interface surfaces intended to come into contact with the front of a sole of the shoe in order to maintain the front of the shoe vertically and laterally. This forward stop also includes a second front retainer of the boot provided for the climb. This second front retainer comprises two points, each being respectively fixed on an extension of a wing, above the interface surfaces. These points constitute elements of a mechanism of attachment of the shoe similar to that described in the document EP-A-0 199 098 . In the embodiments described in the document EP-A-2,626,116 , the tips are fixed on the same housing supporting the interface surfaces of the first front retainer of the boot intended for the descent. Thus, this casing is in direct contact with the front of the shoe to limit the vertical movement towards the top of the shoe when it is engaged with the stop in a descent configuration. Moreover, same housing supports the axis of articulation of the wings and the connecting member with the lateral release mechanism. The document does not specify the material used to make the housing. However, it is clear that it is the same piece, consisting of a single material, which defines the contact surface serving as a vertical stop at the front of the shoe and which constitutes the connection between the pivot axis of the shoe. wing and the associated tip of the attachment mechanism of the shoe. Because the housing serves as a top stop at the front of the shoe, everything leads to consider a plastic housing to facilitate the sliding of the shoe relative to the wing, during a lateral release. Furthermore, the wings described have a mass structure to stiffen the connection between the pivot axis of the wing and the associated tip of the attachment mechanism of the shoe. This connection must be rigid to ensure good stability of the shoe during climbing phases. Indeed, during these phases, the shoe can exert significant lateral forces on the wings that can open, by deformation, in the case where the connection described above is not rigid enough. Also, to obtain a good behavior with a plastic casing, it must be mass.

The object of the invention is to provide an improved front stop.

One purpose is in particular to limit the variation of position of the tips relative to the chassis during use in the climb phase.

Another purpose is to facilitate the lateral release of the front stop.

Another goal is to reduce the clutter of the wings and, in particular to lighten them.

Another purpose is to simplify the design of the structure of the front stop.

Another object is to limit the deformation of the elements of the transmission chain of forces between the trigger mechanism and the wings.

• un corps ;
• deux ailes, chaque aile étant montée pivotante sur le corps autour d'un axe sensiblement vertical ;
• un mécanisme de déclenchement latéral agissant sur la rotation des ailes.

The invention proposes an abutment before attaching a boot to a gliding board comprising:

• a body ;
• two wings, each wing being pivotally mounted on the body about a substantially vertical axis;
• a lateral release mechanism acting on the rotation of the wings.

• une surface interface latérale avec une partie avant de la chaussure ;
• une surface interface horizontale avec une partie avant de la chaussure ;
• un moyen d'accroche apte à coopérer avec une partie latérale avant de la chaussure de sorte à permettre la rotation de la chaussure autour d'un axe sensiblement transversal à la butée ;
• un organe d'actionnement coopérant avec le mécanisme de rappel angulaire ;
• un élément de pivot définissant l'axe de rotation autour duquel pivote l'aile par rapport au corps ;
• un châssis comprenant un premier élément de fixation du moyen d'accroche et un deuxième élément de fixation de l'élément de pivot, les premier et deuxième éléments de fixation étant reliés de manière rigide.

Each wing includes:

• a lateral interface surface with a front part of the shoe;
• a horizontal interface surface with a front part of the shoe;
• a hooking means adapted to cooperate with a front lateral portion of the shoe so as to allow the shoe to rotate about an axis substantially transverse to the stop;
• an actuating member cooperating with the angular return mechanism;
• a pivot member defining the axis of rotation about which the wing pivots relative to the body;
• a frame comprising a first fastening element of the fastening means and a second fastening element of the pivot member, the first and second fastening elements being rigidly connected.

The stop is characterized in that the frame is metallic and the horizontal contact surface is defined by a plastic end piece.

This construction combining two materials for the construction of the wing allows, on the one hand, to obtain sufficient rigidity for a small footprint, with the metal frame, and, on the other hand, to obtain sufficient slip between the shoe and wing, when the lateral thrust of the front stop, with the plastic tip. Thanks to the plastic tip, the coefficient of friction at the contact with the top of the front portion of the boot is reduced, which makes it possible not to degrade the triggering characteristics of the front stop. Thanks to the metal frame, the attachment means remain in contact with the shoe when it is engaged with the stop configured for climbing. In fact, this rigidity makes it possible to limit the variation of position of the hooking means with respect to the chassis during use of the stop during the climbing phase.

• le châssis comprend un troisième élément de fixation de l'organe d'actionnement, le troisième élément de fixation étant relié de manière rigide aux deux autres éléments de fixation,
• une partie du châssis forme le moyen d'accroche,
• le châssis comprend deux extensions parallèles horizontale, chaque extension comprend deux alésages espacés l'un de l'autre et disposés en vis-à-vis de deux alésages de l'autre extension de sorte que deux alésages en vis-à-vis sont alignés selon un axe sensiblement vertical, une première paire d'alésages est destinée à recevoir l'élément de pivot et une deuxième paire d'alésages est destinée à recevoir l'élément de liaison,
• l'embout comprend un logement destiné à recevoir une patte horizontale de l'aile de sorte qu'une fois l'embout assemblé sur l'aile, celui-ci est solidaire de l'aile selon une direction verticale,
• la distance entre la surface interface latérale de chaque aile est plus grande que la largeur de la partie avant de la chaussure lorsque la chaussure coopère avec les moyens d'accroche de chaque aile,
• un capot portant l'embout est fixé sur le châssis,
• chaque surface interface latérale avec une partie avant de la chaussure est réalisée par un galet monté pivotant sur l'aile par rapport à un axe sensiblement vertical,
• l'arbre autour duquel tourne le galet traverse un orifice ménagé dans l'embout lorsque l'aile est assemblée,
• le châssis forme une pièce monobloc présentant une épaisseur sensiblement uniforme, comprise entre 1,5 mm et 5 mm.

According to advantageous but non-obligatory aspects of the invention, such an article may incorporate one or more of the following features, taken in any technically permissible combination:

• the frame comprises a third element for fixing the actuating member, the third fixing element being rigidly connected to the two other fastening elements,
• a part of the chassis forms the means of attachment,
• the frame comprises two horizontal parallel extensions, each extension comprises two bores spaced apart from one another and arranged opposite two bores of the other extension so that two bores in opposite relation are aligned along a substantially vertical axis, a first pair of bores is intended to receive the pivot element and a second pair of bores is intended to receive the connecting element,
• the endpiece comprises a housing for receiving a horizontal flap of the wing so that once the endpiece assembled on the wing, it is secured to the wing in a vertical direction,
• the distance between the lateral interface surface of each wing is greater than the width of the front part of the boot when the boot cooperates with the attachment means of each wing,
• a cap carrying the tip is fixed on the frame,
• each lateral interface surface with a front part of the boot is formed by a roller pivotally mounted on the wing with respect to a substantially vertical axis,
• the shaft around which the roller rotates through a hole in the nozzle when the wing is assembled,
• the frame forms a single piece having a substantially uniform thickness, between 1.5 mm and 5 mm.

• la figure 1 est une vue en perspective d'une butée avant configurée pour la montée ;
• la figure 2 est une vue de dessus de la butée avant de la figure 1 fixée sur une planche de glisse ;
• la figure 3 est une vue de derrière de la figure 2 ;
• la figure 4 est une vue en coupe d'une aile seule de la butée selon IV-IV de la figure 3 ;
• la figure 5 est une vue de dessus de la butée avant configurée pour la descente ;
• la figure 6 est une vue en coupe selon VI-VI de la figure 5;
• la figure 7 est une vue en coupe selon VII-VII de la figure 5;
• la figure 8 est une vue en perspective de l'aile seule de la butée ;
• la figure 9 est une vue en perspective éclatée de dessus de l'aile seule de la butée ;
• la figure 10 est une vue en perspective éclatée de dessous de l'aile seule de la butée.

Other features and advantages of the invention will be better understood with the aid of the following description, with reference to the accompanying drawings illustrating, according to non-limiting embodiments, how the invention can be realized, and in which :

• the figure 1 is a perspective view of a front stop configured for climbing;
• the figure 2 is a top view of the stop before the figure 1 fixed on a gliding board;
• the figure 3 is a back view of the figure 2 ;
• the figure 4 is a sectional view of a single wing of the abutment according to IV-IV of the figure 3 ;
• the figure 5 is a top view of the front stop configured for descent;
• the figure 6 is a sectional view according to VI-VI of the figure 5 ;
• the figure 7 is a sectional view along VII-VII of the figure 5 ;
• the figure 8 is a perspective view of the wing alone of the stop;
• the figure 9 is an exploded perspective view from above of the single wing of the stop;
• the figure 10 is an exploded perspective view from beneath the single wing of the stop.

The invention relates to a binding of a shoe on a gliding board 9, such as a ski, comprising a rear retaining device of the shoe, called "heel" and a front retainer 1 of the shoe, called " front stop ". The gliding board 9 comprises an upper surface 91 on which are fixed the elements of the binding and a lower surface 92, or sliding surface, intended to be in contact with the snow. The combination of the shoe with the front stop 1 and / or the heel ensures the fastening of the shoe with the gliding board 9. A gliding device refers to the gliding board 9 equipped with a binding.

The invention relates more specifically to a stop before 1 of such a fixation.

In the rest of the description, terms such as "horizontal", "vertical", "longitudinal", "transversal", "superior", "lower", "up", "down", "before" will be used. , " back ". These terms must in fact be interpreted relatively in relation to the normal position that the stop before 1 occupies on a ski, and the normal direction of advancement of the ski. For example, "longitudinal" refers to the longitudinal axis of the ski.

A mark will also be used whose longitudinal or front / rear direction corresponds to the X axis, the transverse or right / left direction corresponds to the Y axis and the vertical direction or up / down direction corresponds to the Z axis.

On the other hand, in the description, certain directions are qualified in relation to a repository. In order not to limit the interpretation, the term "substantially" will be used to make it clear that the invention also relates to an angular variation of this direction of plus or minus 30 ° with respect to this qualification.

Furthermore, the term "engagement", the fastening of the shoe with the fixing and "trigger", the separation of the shoe with the binding. More specifically, the "lateral release" corresponds to the triggering of the attachment by a lateral force of the boot on the binding. In the embodiments described below, the lateral release is performed at the front stop, by a lateral displacement of the front of the shoe.

In the description, reference will also be made to the "opening" of a wing to specify that this wing pivots about its axis of rotation so that the portion of the wing intended to come into contact with a portion of the shoe, moves away from the shoe. In our example, this means that the right wing opens when it turns counterclockwise and that the left wing opens when it turns clockwise, when we look at the stop, seen from above, the before the stop at the top. In contrast, the wings are "closed" when the interface portion of each wing is close to the shoe. As a result, a lateral release tends to "open" a wing.

The shoes adapted to the binding according to the invention generally comprise a shell provided with two removable tips fixed under the shell, a rear end, located under the heel and a front end, located under the toes. The sole of the shoe is thus formed by the two ends and the lower part of the shell. The invention is not limited to this type of shoe and also relates to other constructions of the shoe, for example, shoes without removable tips, the sole can be integrally formed by the lower part of the shell.

The stop before 1 according to the invention is designed primarily for the practice of ski touring. It comprises two front retainers 11, 12 of the shoe which are alternately used depending on the phase of ski touring: downhill or climb.

An example of a stop before 1 according to the invention is generally illustrated in FIGS. Figures 1 to 3 and 5 to 7 .

A first front retainer 11 of the front stop is intended for downhill or downhill skiing. When the shoe is engaged with the first front retainer 11, it is immobilized between the heel piece and the first front retainer 11. The shoe heel thus cooperates with a heel piece, not shown.

A second front retainer 12 of the front stop 1 is intended for the climbing phases. It cooperates with a front part of the sole of a shoe so as to allow the rotation of the shoe around a hinge axis Y11, extending transversely to the gliding board 9, at the front of the shoe. the shoe. When the shoe is engaged with the second front retainer 12, it can rotate freely about this axis Y11. For this, the heel of the shoe does not cooperate with a heel, unlike the previous configuration.

The front stop 1 can be set in at least two configurations.

A first configuration, called downhill, corresponds to the adjustment of the front stop 1 allowing the shoe to cooperate with the first front retainer 11. This configuration is illustrated in particular in FIG. figure 5 .

A second configuration, called upward, corresponds to the adjustment of the front stop 1 allowing the shoe to cooperate with the second front retainer 12. This configuration is illustrated in particular in FIG. figure 2 .

In this example, the first front retainer 11 and the second front retainer 12 comprise the same parts: a body 2, two wings 3, 4. These two front retainers 11, 12 are distinguished by the parts of the wings 3, 4 interacting with the front of the shoe.

The body 2 comprises a lower bearing surface 21 intended to come into contact with the upper surface 91 of the gliding board 9. The body 2 is fixed on the gliding board 9 by conventional fastening means. The connection between the body 2 and the gliding board 9 is of embedding type. In a variant, the body 2 is slidably mounted on the gliding board 9 in the longitudinal direction X of the gliding board 9. This translation of the body 2 allows adjustment of the longitudinal position of the front stop 1. With this variant, there is provided a locking mechanism for immobilizing the body 2 relative to the gliding board 9.

The body 2 supports the two wings 3, 4. Each wing 3, 4 is pivotally mounted relative to the frame about an axis of rotation Z37, Z47, substantially vertical, that is to say, perpendicular to the surface of the body. lower support 21. For this, each wing carries a pivot member 37 (the pivot element of the wing 4 is not shown) defining the axis of rotation Z37, Z47 around which pivots the wing relative to the body. In this example, each pivot member 37 is a shaft mounted in bores 21 of the body, along a vertical axis. The axes of rotation Z37, Z47 are positioned longitudinally at the same level and, symmetrically, on either side of a median longitudinal axis X1 of the abutment 1. In this example, the axes of rotation Z37, Z47 are distinct.

The two wings 3, 4 are arranged symmetrically with respect to a median plane M of the front stop 1, that is to say, the vertical plane comprising the median longitudinal axis X1 of the stop. As the two wings 3 and 4 have a symmetrically similar structure, only the right wing 3 will be described later. The components of the left wing being similar and structurally symmetrical with respect to the median vertical plane M, they will not be described, to simplify the description.

Each wing 3 comprises a first - 301 - and second arm 302. The two arms are connected at the axis of rotation Z37 and form an angle of between 60 and 120 °. When the first front retainer 11 is engaged with the boot, the first arm 301 of a wing extends rearwardly of the abutment substantially in a longitudinal direction. The second arm 302 extends towards the other wing, slightly towards the front of the abutment 1.

Subsequently, the term α-opening angle of the wings 3, 4, the angle formed by the first two arms. To express this angle of opening α, one can, for example, consider the median axis of the first arms. The lower the opening angle α, the closer the free ends of the first arms are. As a result, when the opening angle is reduced, the wings close. Conversely, when increasing the opening angle a, the wings open.

The free end of the second arm 302 supports an actuating member 38 connecting this free end with an angular return mechanism 5. The actuating member 38 is here in the form of a connecting pin extending according to a substantially vertical direction and therefore substantially parallel to the axis of rotation Z37. Other types of actuator may be envisaged.

The angular return mechanism 5 is designed to cooperate with the wings to close them to a stable configuration when opening the wings. It thus makes it possible to reduce the opening angle of the wings as soon as the wings are laterally biased in the direction of opening. In this example, the angular return mechanism 5 is housed in frame 2. Such an angular return mechanism is known and is, for example, described in the documents EP-A-2,626,116 or EP 2 929 919 .

The free end of the first arm 301 supports interface elements intended to come into contact with a front part of the boot. These interface elements differ depending on the used front retainer 11 or 12.

Regarding the first front restraint 11, for the descent, the interface element of each wing comprises at least two interface surfaces. These interface surfaces comprise a lateral interface surface 352 intended to come into contact with a lateral face of the front part of the boot and a horizontal interface surface 341 intended to come into contact with an upper face of the front part of the boot.

In this example, the lateral interface surface 352 is made by an outer cylinder of a roller 35 pivoting about a shaft 36 fixed to the free end of the first arm 301 of the wing 3 and extending in a direction substantially vertical Y36. The horizontal interface surface 341 is formed by a ferrule 34 attached to the free end of the first arm 301. The roller 35 and / or the ferrule 34 may consist of a material facilitating sliding with the shoe such as a PolyOxyMethylene (POM). Alternatively, these interface surfaces 352, 341 can be made differently. For example, the lateral interface surface 352 may be made directly by a portion of the tip 34 described above.

Regarding the second front retaining device 12, intended for mounting, the interface element of each wing comprises a respective attachment means 312 adapted to cooperate with a front lateral part of the boot, so as to allow the rotation of the shoe around the hinge axis Y11, substantially transverse to the gliding board.

The attachment means 312 is here a point intended to project into the internal volume defined by the wings 3 and 4. The attachment means 312 may also be formed by a cylinder or other suitable structure to continuously ensure the pivoting guidance of the boot in the up position.

We will now describe the structure of a wing.

The right wing 3 is illustrated in more detail in figures 4 , 8 , 9 and 10 . The right wing 3 comprises a metal frame 31. The frame 31 forms the first - 301 and second arm 302 of the wing. It comprises a first fixing element of the attachment means 312, at the end of the first arm 301. It comprises a second element for fixing the pivot element 37, at the junction between the two arms 301, 302 It comprises a third element for fastening the actuating member 38, at the end of the second arm 302.

The first and second fasteners are rigidly connected. The frame 31 thus comprises a vertical wall 351 connecting the first attachment element of the attachment means 41 and the second attachment member of the pivot member.

The attachment means 312 is here formed integrally or in one piece with the frame 31. The first fastening element of the attachment means 312 is formed of a connection made of material with the vertical wall 351. The means The hook 312 here forms a projection substantially perpendicular to the vertical wall 351. The fact that the attachment means 312 is integrally formed with the frame 31 makes it possible to reduce the number of components of the stop before 1 and makes it more economic.

It can also be envisaged that the attachment means 312 is attached to the vertical wall 351, for example by making a threaded bore cooperate with a threaded extension of the attachment means 312. In this case, the first fastening element of the fastening means Attachment 312 corresponds to the threaded hole of the frame for receiving the threaded extension of the attachment means 312. The fact that the attachment means 312 is reported to facilitate its replacement in case of wear.

The attachment means 312 is here fixed at a rear end and upper end of the frame 31.

The second and third fasteners are also rigidly connected. The second arm 302 of the wing 3 is then formed by a horizontal upper extension 313 and a horizontal lower extension 314 of the frame 31. These two horizontal extensions 313 and 314 are parallel and spaced along a vertical axis. They are connected to the vertical wall 311 and extend substantially perpendicular thereto. The horizontal extensions 313 and 314 here protrude inward towards the body 2. The extensions 313 and 314 are here planar, which facilitates their manufacture and their guidance relative to the body 2.

The upper extension 313 has a first bore 3131, close to the vertical wall 311. The lower extension 314 also has a first bore 3141 near the wall 311. The first bores 3131 and 3141 are facing each other. screw and aligned along the vertical pivot axis Z37 of the wing 3. The first bores 3131 and 3141 are intended to receive the pivot member 37, as illustrated in FIG. figure 6 . They form the second fastening element of the pivot element. The pivot element 37 is here made by a shaft mounted in the first bores 3131 and 3141. The pivot member 37 is pivotally mounted in a bore 21 along a vertical axis of the body 2.

The upper extension 313 further comprises a second bore 3132, near the free end of the extension 313. The lower extension 314 also comprises a second bore 3142, near the free end of the extension 314. The second bores 3132 and 3142 are vis-à-vis and aligned along a vertical axis Z38, substantially parallel to the pivot axis Z37. The second bores 3132 and 3142 are intended to receive the actuating member 37. They thus form the third fastening element of the actuating member. The actuating member 38 is here made by a shaft mounted in the first bores 3132 and 3142. The actuating member 38 is adapted to cooperate with a member of the angular return mechanism 5 to act on the rotation of the wing.

With such a design, the extensions 313 and 314 provide a rigid connection between the second and third fasteners. Thus, the frame 31 forms a rigid mechanical chain from the third fastening element of the actuating member 38, through the second fastening element of the pivot member 37, to the first fastening element of the means. 312. This limits the deformation of the wing 3 between the fasteners and in particular during the transmission of forces between the angular return mechanism 5 and the attachment means 312. Such rigidity is also obtained with a relatively simple structure.

To facilitate its manufacture and promote its rigidity, the frame 31 advantageously forms a substantially integral piece of a substantially uniform thickness, typically between 1.5 mm and 5 mm. With a substantially uniform thickness, the frame can be made with simple and fast processes, such as molding or stamping / bending, while obtaining good mechanical properties. The risk of shrinkage or air bubbles is avoided. The metal frame 31 may, for example, be made of steel or aluminum.

In this example, a cover 32 is fixed on the frame 31. This cover 32 comprises a vertical wall 321 covering, in part, the outer face of the vertical wall 311 of the frame 3. It comprises an upper covering area 324, covering, in part, the upper face of the upper extension 313. It comprises a lower overlapping zone 325, covering, in part, the lower face of the lower extension 314. The cover 32 also comprises a horizontal upper tab 322 and a tab lower horizontal 323. These two horizontal legs 322, 323 are parallel and distant along a vertical axis. They extend rearwardly from a rear face of the vertical wall 321 of the cover 32. In this example, the upper lug 322 is positioned above the attachment means 312 and the lower lug 323 is positioned below securing means 312.

In this embodiment, the cover 32 is fixed to the frame 31 by a screw 33 passing through a bore 315 formed on the vertical wall 311 of the frame 31 and engaging with the non-emerging threaded bore of an inner shaft 3211 of the vertical wall 321 of the hood 32. When the hood 32 is assembled with the frame 31, the head of the screw 33 is pressed against an inner face of the wall vertical 311 of the frame 31. In addition, the cover 32 is wedged vertically and rotated about the transverse axis of the screw 33 by the overlap areas 324, 325. The vertical wall 321 of the cover 32 and the vertical wall 311 of the frame 31 form the first arm 301 of the wing 3, when the hood and the frame are assembled.

A blind hole 3241, defining a span, is provided in the upper overlap zone 324, and accessible from a lower face of this upper overlap zone 324. A through hole 3251 is formed in the lower overlap zone 325. The holes 3241 and 3251 are arranged vis-à-vis. As illustrated in figure 6 during the assembly of the cover 32 on the frame 31, the holes 3241 and 3251 are aligned on the axis Z37, so as to receive the pivot member 37. The pivot member 37 thus participates in the attachment of the cover 32 on the frame 31.

The cover 32 thus protects the frame 31 and the pivot member 37 against the weather. The cover 32 is plastic. It also improves the finish of the wing 3 and, in particular, to allow manipulation of the non-injuring wing. In addition, the hood reinforces the wing without weighing it down because of the use of a plastic material.

In this example, a tip 34 is attached to the first arm 301 of the wing 3 and, more particularly, to the horizontal upper tab 322 of the cap 32. This tip 34 is made of plastic.

The tip 34 carries the horizontal interface surface 341 intended to come into contact with an upper face of the front part of the boot. This horizontal interface surface 341 is in the form of a lower horizontal plane face, facing downwards. This surface therefore corresponds to one of the interface surfaces of the first front retaining device 11, intended for descent.

The tip 34 further comprises a housing 343 with front opening. This housing 343 is intended to fit into the horizontal upper lug 322 of the cover 32. Thus, when the end piece 34 is assembled to the cover 32, the end piece 34 is secured to the flange 3 in the vertical directions and cross. Thus, by a simple structure, it was realized the fixing of the plastic tip 34 on the wing 3. The cover 32 is thus advantageously used to fix the tip 34 on the wing 3, so as not to make the design of the metal frame 31 too complex.

The tip 34 also has an orifice 342 having a substantially vertical axis, and accessible from the horizontal interface surface 341 of the nozzle 34. The orifice 342 opens into the housing 343.

Moreover, the upper lug 322 of the cover 32 has a hole 3221 of vertical axis, and the lower lug 323 of the cover 32 also has a hole 3231 of vertical axis. The orifices 3221 and 3231 are vis-à-vis and are aligned on the same vertical axis Z36. In addition, the orifice 342 of the tip 34 is arranged so that, when the tip 34 is assembled to the cover 32, the orifice 342 is aligned with the orifices 3221 and 3231 along the vertical axis Z36. A shaft 36 is inserted through the three orifices 3221, 3231 and 342, when the end piece 34 is fitted on the cover 32. Thus, the end piece 34 is fixed longitudinally with respect to the flange 3.

The shaft 36 passing through the orifices 3221 and 3231 is advantageously used to mount the roller 35 pivoting on the flange 3. The roller 35 thus comprises a bore 351 formed along the axis of the roller 35. The bore 351 is traversed by the shaft 36 when the roller 35 is positioned between the tabs 322 and 323 of the cover 32. The roller 35 is then pivotally mounted on the flange 3 relative to the substantially vertical axis Z36. The outer cylinder of the roller, or more precisely a part of this cylinder, defines the vertical interface surface 352 intended to come into contact with a lateral face of the front part of the boot. This contact between the roller and a side portion of the front of the shoe thus corresponds to one of the interface surfaces of the first front retainer 11, for the descent.

The use of a pivoting roller 35 to form the lateral contact surface 352 facilitates triggering by the boot in the downhill position, when sufficient pivoting of the wing 3 is achieved. The shaft 36 is advantageously fixed on the cover 32, which simplifies the design of the metal frame 31.

In the example shown, the shaft 36 passes through both the bore 351 of the roller 35 and the orifice 342 of the endpiece 34. Thus, the same shaft 36 can be used both for fixing the tip 34 on the wing 3, and for the pivoting mounting of the roller 35.

Alternatively, it is possible to fix the attachment independent of the fixing of the roller.

This wing construction makes it possible to use the same rigid chassis for the first-11 and the second front retainer 12. The metal structure of the chassis makes it possible to limit the deformations in the mechanical chain between the interface elements with the shoe. these front retainers 11, 12 and the pivot member. Moreover, this construction allows the use of plastic part for the interface elements of the front retainer 11, intended for the descent. This facilitates the lateral release of the front stop 1 because of the choice of a coefficient of friction adapted between these interface elements and the shoe promoting relative sliding between the parts.

The front stop can include other mechanisms to manage the opening of the wings or to configure the stop in climb mode or down mode. Such mechanisms are described, for example, in the document EP 2 929 919 . They will not be described.

When the stop is configured for the descent, the angle of opening of the wings is such that the vertical interface surfaces interfere with the lateral parts of the front of a shoe in engagement with the binding. As a result, engagement of the fastener causes the wings of the abutment to move apart. The wings are then held pressed against the lateral parts of the front of the shoe thanks to the angular return mechanism 5. Thus, when a lateral force is exerted on the front of the shoe, the wing applied exerts a resistant force opposing the opening, via the angular return mechanism 5. The mechanism of angular reminder 5 thus serves as a safety device and corresponds to a lateral release mechanism.

When the stop is configured for the climb, the angle of opening of the wings is such that the attachment means cooperate with a front portion of the sole of a shoe so as to allow the rotation of the shoe around a hinge pin Y11. During these climbing phases, there is no need for a safety device. The opening angle of the wings must be maintained so as not to disengage the front of the ski boot. A locking mechanism of this angle can be provided. The angular return mechanism can be inhibited because it is not useful during the ascension phases.

Furthermore, in this climb configuration, the distance between the lateral interface surface 352 of each wing 3, 4 is greater than the width of the front portion of the boot when the boot cooperates with the attachment means 312 of each wing. 3, 4. This construction avoids interference of the shoe with the interface surfaces of the first front retainer 11, when the shoe pivots about the axis Y11. In addition, it allows to lower the pivot axis Y11 of the shoe which provides better control of the ski, during climbing phases.

According to one variant, the wing 3 does not comprise a cover 32. In this case, the end piece 34 is directly fixed on the frame 31. This makes it possible to reduce the number of parts and to lighten the weight of the abutment.

According to another embodiment, the second and third fasteners are not connected by the frame but only by the cover or a separate housing. In other words, the second arm of the wing is not made by the frame. This construction makes it possible to design a chassis that is simpler and more economical to produce.

The invention is not limited to these embodiments. It is possible to combine these embodiments.

The invention is not limited to the previously described embodiments but extends to all the embodiments covered by the appended claims.

Nomenclature

1-

Stop before
11- First front restraint
12- Second front restraint

2-

Body
21- Lower support surface
22- Bore

3-

Right wing
301- First arm
302- Second arm
31- Chassis
311- Vertical wall
312- How to hang on
313- Upper Extension
3131- First bore
3132- Second bore
314- Lower Extension
3141- First bore
3142- Second bore
315- Bore
32- Hood
321- Vertical wall
3211- Barrel
322- Upper leg
3221- Orifice
323- Lower leg
3231- Orifice
324- Upper cover area
3241- One-eyed hole
325- Lower cover area
3251- Hole
33- Screw
34- Tip
341- Surface horizontal interface
342- Orifice
343- Previous accommodation
35- Roller
351- Bore
352- Side interface surface / outer cylinder
36- Tree
37- Pivot element
38- Actuating member

4-

Left wing
412- How to hang on

5-

Angular return mechanism

9-

Board of glide
91- Upper surface
92- Lower surface

Claims (8)

1. Front stop (1) for fixing a shoe to a sliding board (9) comprising:

   - a member (2);

   - two wings (3, 4), each wing being mounted for pivoting on the member about a substantially vertical axis (Z37, Z47);

   - an angular return mechanism (5) which acts on the rotation of the wings;
   each wing (3) comprising:

   - a lateral interface surface (352) with respect to a front portion of the shoe;

   - a horizontal interface surface (341) with respect to a front portion of the shoe;

   - a securing means (312) which is capable of cooperating with a front lateral portion of the shoe so as to allow the rotation of the shoe about a substantially transverse axis (Y11) relative to the stop;

   - an actuation member (38) which cooperates with the angular return mechanism (5);

   - a pivot element (37) which defines the rotation axis (Z37) about which the wing pivots relative to the member (2) ;

   - a frame (31) comprising a first fixing element for the securing means (312) and a second fixing element (3131, 3141) for the pivot element (37), the first and second fixing elements being rigidly connected;

   characterized in that the frame (31) forms a metal monobloc piece which has a substantially uniform thickness between 1.5 mm and 5 mm, and in that the horizontal interface surface (341) is defined by an end piece (34) of plastics material.
2. Front stop (1) according to Claim 1, wherein the frame (31) comprises a third fixing element (3132, 3142) of the actuation member (38), the third fixing element being rigidly connected to the other two fixing elements.
3. Front stop (1) according to either of the preceding claims, wherein a portion of the frame (31) forms the securing means (312).
4. Front stop (1) according to any one of the preceding claims, wherein the frame (31) comprises two horizontal parallel extensions (313, 314), each extension comprises two bores (3131, 3132) which are spaced apart from each other and which are arranged opposite two bores (3141, 3142) of the other extension so that two opposing bores are aligned in accordance with a substantially vertical axis (Z37, Z38), a first pair of bores (3131, 3141) is intended to receive the pivot element (37) and a second pair of bores (3132, 3142) is intended to receive the actuation member (38).
5. Front stop (1) according to any one of the preceding claims, wherein the end piece (34) comprises a housing (343) which is intended to receive a horizontal tab (322) of the wing (3) so that, once the end piece (34) is assembled on the wing, the end piece is fixedly joined to the wing in accordance with a vertical direction.
6. Front stop (1) according to any one of the preceding claims, wherein a cap (32) which carries the end piece (34) is fixed to the frame (31).
7. Front stop (1) according to any one of the preceding claims, wherein each lateral interface surface (352) with respect to a front portion of the shoe is constructed by a roller (35) which is mounted for pivoting on the wing (3) relative to a substantially vertical axis (Z36).
8. Front stop (1) according to the preceding claim, wherein the shaft (36) about which the roller (35) rotates extends through a hole (342) which is arranged in the end piece (34) when the wing (3) is assembled.

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