EP2944361A1 - Mountaineering ski binding - Google Patents

Abstract

Front stop (3) of a binding of a shoe on a gliding board (4) comprising: - A first front retainer (10) of the boot provided for climbing the slope, said device comprising attachment means (11a, 11b) of the shoe defining a hinge axis (Y 11) around which pivots the boot when the front stop is in a mounted configuration; a second front retainer (20) of said boot intended for the descent, said device comprising two wings (21a, 21b), each wing supporting a lateral interface surface (216a, 216b) adapted to come into contact with a front portion (52) of the boot when the front stop is in a downhill configuration; - A longitudinal stop surface (2313) movable between an active position for which it is adapted to cooperate with the front portion of the shoe and an inactive position for which it is arranged to be unable to cooperate with the front part of the shoe ; The longitudinal stopping surface (2313) is movable relative to the wings.

Description

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

There are front stops including devices adapted to the phases of the practice of ski touring: ascent or descent.

The document US 8,544,869 describes, for example, a first attachment mechanism of a shoe, classic, dedicated to the climb. This comprises means for attaching the shoe defining a hinge axis about which pivots the shoe when it is engaged with this mechanism. During the descent phases, this mechanism is reinforced by a second mechanism that covers the front part of the shoe. This second mechanism comprises a jaw comprising two wings and a longitudinal bearing surface. The jaw is movable between an active position where it is in contact with the shoe and an inactive position where it is no longer in contact with the shoe.

In this solution, the wings and the bearing surface form a single piece. With this one-piece construction, it is necessary to provide a large clearance, in front of the stop, to retract the jaw to create a space at the first mechanism in order not to hinder the rotation of the shoe. The jaw can only withdraw towards the front of the stop because of its size. This results in a relatively large stop. Moreover, this construction does not allow relative movement between the wings.

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

One goal is to provide a compact front stop, with a small footprint.

Another goal is to propose a stop before to create a free volume between the wings.

Another object is to propose a front stop comprising movable wings between them.

The invention proposes an abutment before attaching a boot to a gliding board comprising a first front retainer of the boot intended for slope climbing, said device comprising means for attaching the boot defining a hinge pin about which the shoe pivots when the front stop is in a mounted configuration; a second front retainer of said shoe provided for the descent, said device comprising two wings, each wing supporting a lateral interface surface adapted to come into contact with a front portion of the boot when the front stop is in a downward configuration; a longitudinal stopping surface movable between an active position for which it is adapted to cooperate with the front part of the shoe and an inactive position for which it is arranged to no longer cooperate with the front part of the shoe.

The front stop is characterized by the fact that the longitudinal stop surface is movable relative to the wings.

• Une aile est mobile par rapport à l'autre.
• Le déplacement de la surface d'arrêt longitudinal est une translation ou une rotation ou une combinaison de mouvement.
• La surface d'arrêt est solidaire d'une pièce support mobile.
• La surface d'arrêt longitudinal est réalisée par une pièce rapportée sur la pièce support.
• Lorsque la surface d'arrêt longitudinal est dans la position inactive, la pièce support est positionnée par rapport au premier dispositif de retenue avant de sorte qu'aucune partie de la pièce support n'interfère avec la chaussure lorsque celle-ci pivote autour de son axe d'articulation, en configuration montée.
• La pièce support est montée rotative par rapport à un châssis et positionnée par rapport au deuxième dispositif de retenue avant de sorte que la pièce support bascule vers l'arrière de la butée pour venir se loger entre les ailes, en dessous de celles-ci, lorsque la surface d'arrêt longitudinale est dans la position inactive.
• La pièce support comprend une surface butée apte à venir en contact avec le châssis pour positionner la surface d'arrêt longitudinal en position active.
• La pièce support comprend un rebord apte à recouvrir partiellement la partie avant de la chaussure.
• La pièce support comprend un moyen de maintien destiné à coopérer avec un élément de la butée pour maintenir la pièce support en position repliée stable.
• La pièce support forme un actionneur d'un mécanisme de réglage.
• Le mécanisme de réglage permet d'écarter les ailes du deuxième dispositif de retenue avant.
• La surface d'arrêt longitudinal est dans la position active lorsque la butée avant est dans une configuration descente.

According to advantageous but non-mandatory aspects of the invention, such a front stop may incorporate one or more of the following features, taken in any technically permissible combination:

• One wing is mobile with respect to the other.
• The displacement of the longitudinal stopping surface is a translation or a rotation or a combination of movement.
• The stop surface is secured to a movable support piece.
• The longitudinal stop surface is formed by an insert on the support piece.
• When the longitudinal stop surface is in the inactive position, the support piece is positioned relative to the first retainer before so that no part of the support piece interferes with the shoe when it pivots around its hinge pin, in mounted configuration.
• The support piece is rotatably mounted relative to a frame and positioned relative to the second front retainer so that the support piece tilts towards the rear of the stop to be housed between the wings, below them, when the longitudinal stop surface is in the inactive position.
• The support member comprises a stop surface adapted to come into contact with the frame for positioning the longitudinal stop surface in the active position.
• The support piece comprises a rim adapted to partially cover the front portion of the shoe.
• The support member comprises a holding means for cooperating with a stop member element to maintain the support piece in the stowed position stable.
• The support part forms an actuator of an adjustment mechanism.
• The adjustment mechanism allows the wings of the second front restraint to be moved apart.
• The longitudinal stopping surface is in the active position when the front stop is in a downward configuration.

The invention also relates to a gliding machine equipped with a front stop as described above.

• la figure 1 est une vue en perspective avant d'une partie d'une chaussure en prise avec une butée avant selon l'invention, la butée avant étant dans une première configuration dite de descente ;
• la figure 2 est une vue en perspective avant du sous-ensemble de la figure 1, la butée avant étant dans une troisième configuration dite de montée ;
• la figure 3 est une vue de côté d'une partie d'une chaussure en prise avec une butée avant de la butée avant fixée sur une planche de glisse, la butée avant étant dans sa première configuration dite de descente ;
• la figure 4 est une vue de côté du sous-ensemble de la figure 3, la butée avant étant dans sa troisième configuration dite de montée, la semelle de la chaussure étant parallèle à la planche de glisse ;
• la figure 5 est une vue de côté du sous-ensemble de la figure 4, la semelle de la chaussure étant perpendiculaire à la planche de glisse, après avoir pivotée ;
• la figure 6 est une vue de dessus de la figure 3 ;
• la figure 7 est une vue de dessus du sous-ensemble de la figure 6, la butée avant étant dans une deuxième configuration dite de chaussage ;
• la figure 8 est une vue de dessus de la figure 4 ;
• la figure 9 est une vue en perspective arrière de la butée avant seule, la butée avant étant dans sa première configuration dite de descente ;
• la figure 10 est une vue en perspective arrière de la butée avant seule, la butée avant étant dans sa deuxième configuration dite de chaussage ;
• la figure 11 est une vue en perspective arrière de la butée avant seule, la butée avant étant dans sa troisième configuration dite de montée ;
• la figure 12 est une vue en coupe de la butée avant seule selon XII-XII de la figure 6 ;
• la figure 13 est une vue en coupe selon XIII-XIII de la figure 12 ;
• la figure 14 est une vue en coupe de la butée avant seule selon XIV-XIV de la figure 7 ;
• la figure 15 est une vue en coupe selon XV-XV de la figure 14 ;
• la figure 16 est une vue en coupe de la butée avant seule selon XVI-XVI de la figure 8 ;
• la figure 17 est une vue en coupe selon XVII-XVII de la figure 16 ;
• la figure 18 est une vue en perspective arrière d'un mécanisme de positionnement de la butée avant, le mécanisme étant dans une première configuration ;
• la figure 19 est une vue en perspective arrière du mécanisme de la figure 18, le mécanisme étant dans une deuxième configuration.

Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limitative, with reference to the appended drawings, in which:

• the figure 1 is a perspective view before a portion of a shoe engaged with a front stop according to the invention, the front stop being in a first so-called descent configuration;
• the figure 2 is a perspective view before the subset of the figure 1 the forward stop being in a third so-called rise configuration;
• the figure 3 is a side view of a portion of a shoe engaged with a stop before the front stop fixed on a gliding board, the front stop being in its first so-called downhill configuration;
• the figure 4 is a side view of the subset of the figure 3 , the forward stop being in its third so-called rise configuration, the sole of the shoe being parallel to the gliding board;
• the figure 5 is a side view of the subset of the figure 4 , the sole of the shoe being perpendicular to the gliding board, after pivoting;
• the figure 6 is a top view of the figure 3 ;
• the figure 7 is a top view of the subset of the figure 6 , the forward stop being in a second so-called boot configuration;
• the figure 8 is a top view of the figure 4 ;
• the figure 9 is a rear perspective view of the front stop alone, the front stop being in its first so-called descent configuration;
• the figure 10 is a rear perspective view of the front stop only, the front stop being in its second so-called boot configuration;
• the figure 11 is a rear perspective view of the front stop only, the front stop being in its third so-called rise configuration;
• the figure 12 is a sectional view of the front stop alone according to XII-XII of the figure 6 ;
• the figure 13 is a sectional view according to XIII-XIII of the figure 12 ;
• the figure 14 is a sectional view of the front stop alone according to XIV-XIV of the figure 7 ;
• the figure 15 is a sectional view according to XV-XV of the figure 14 ;
• the figure 16 is a sectional view of the front stop alone according to XVI-XVI of the figure 8 ;
• the figure 17 is a sectional view according to XVII-XVII of the figure 16 ;
• the figure 18 is a rear perspective view of a positioning mechanism of the front stop, the mechanism being in a first configuration;
• the figure 19 is a rear perspective view of the mechanism of the figure 18 , the mechanism being in a second configuration.

The invention relates to a binding of a boot 5 on a gliding board 4, such as a ski, comprising a rear retaining device of the boot, called "heel piece" and a front retaining device of the boot, called " stop ". The gliding board 4 comprises an upper surface 41 on which are fixed the elements of the binding and a lower surface 42, or sliding surface, intended to be in contact with the snow. The combination of the shoe 5 with the front stop and / or heel ensures the fastening of the shoe with the gliding board. The gliding device 1 designates the gliding board 4 equipped with a binding.

The invention relates more specifically to a stop before 3 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 in a relative manner in relation to the normal position that the forward stop occupies on a ski, and the normal direction of advancement of the ski. For example, "longitudinal" refers to the longitudinal axis of the ski.

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.

The shoes 5 adapted to the binding according to the invention generally comprise a shell provided with two removable tips attached 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. To facilitate understanding and lighten the drawings, the shoe will be shown in some figures only by the front end. 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 3 according to the invention is designed primarily for the practice of ski touring although it could also apply to a practice of alpine skiing only. It comprises two front retaining devices of the boot that are alternately used depending on the phase of ski touring: ascent or descent.

A first retainer 10 before the front stop is intended for climbing phases. It cooperates with a front portion 52 of the sole 51 of a shoe 5 so as to allow the rotation of the shoe about a hinge axis Y ₁₁ , extending transversely to the gliding board, at the level of the 'before the shoe. When the shoe 5 is engaged with the first front retainer 10, it can rotate freely about this axis. For this, the heel of the shoe does not cooperate with a heel.

A second front restraint 20 of the front stop is intended for downhill or downhill skiing. When the shoe 5 is engaged with the second front retainer 20, it is immobilized between the heel piece and the second front retainer 20. The shoe heel cooperates with a heel and unlike the previous configuration.

The front stop 3 can be set in three configurations.

A first configuration, called downhill, illustrated in the figures 1 , 3 , 6 , 9 , 12, 13 , corresponds to the adjustment of the stop allowing the shoe to cooperate with the second front retainer 20.

A second configuration, known as a boot, illustrated in the figures 7 , 10 , 14, 15 , corresponds to the adjustment of the stop allowing the release of the boot when it is engaged with the first front retainer 10. In this configuration, the shoe cooperates neither with the first retainer before 10, nor with the second retainer before 20.

A third configuration, called climb, illustrated in the figures 2 , 4 , 5 , 8 , 11 , 16, 17 , corresponds to the setting of the stop allowing the shoe to cooperate with the first front retainer 10.

The second front retainer 20 will now be described in more detail.

In this example, the second front retainer 20 comprises a frame 31, two wings 21a, 21b, a lateral release mechanism 22, an adjusting mechanism 23, a positioning mechanism 24.

The frame 31 comprises a lower bearing surface 311 intended to come into contact with the upper surface 41 of the gliding board 4. It is fixed on the gliding board by conventional fastening means. The connection between the frame and the gliding board is of embedding type. In a variant, the frame is slidably mounted on the gliding board in the longitudinal direction of the gliding board. This translation of the frame allows adjustment of the longitudinal position of the front stop 3. With this variant, there is provided a locking mechanism for immobilizing the frame relative to the gliding board.

The frame 31 supports two wings 21a, 21b. Each of the wings pivots around a shaft 211a, 211b, integral with the frame, extending along an axis of rotation Z _211a , Z _211b substantially vertical, that is to say, perpendicular to the bearing surface 311. The axes of rotation Z _211a , Z _211b are positioned longitudinally at the same level and on either side of a median longitudinal axis X ₃ of the abutment. In this example, the axes of rotation Z _211a , Z _211b are distinct.

Each wing 21a, 21b comprises a first - 212a, 212b - and second arm 213a, 213b. The two arms are connected at the axis of rotation Z _211a , Z _211b and form an angle of between 60 and 120 °. The two wings are arranged symmetrically with respect to a median plane M of the abutment, that is to say, the vertical plane comprising the median longitudinal axis X ₃ of the abutment. When the second front restraint 20 is engaged with the boot, the first arm 212a, 212b of one wing extends towards the other wing, slightly forward of the stop, and the second arm 213a, 213b extends rearwardly of the stop, substantially in a longitudinal direction.

The free end of the first arm 212a, 212b supports a connecting pin 214a, 214b extending in a substantially vertical direction and therefore substantially parallel to the axes of rotation Z _211a , Z _211b .

The free end of the second arm 213a, 213b supports interface surfaces with a front portion 52 of the sole 51 of the shoe 5, when the second front retainer 20 is engaged with the shoe. These interface surfaces comprise a lateral interface surface 216a, 216b intended to come into contact with a lateral face 526a, 526b of the front portion 52 of the boot and a vertical interface surface 217a, 217b intended to come into contact with an upper face 527 of the front part 52.

In this example, the lateral interface surface 216a, 216b is formed by pads 215a, 215b attached to the free end of the second arm 213a, 213b. These same pads also form the vertical interface surface 217a, 217b. They may be made of a material facilitating sliding with the shoe such as a PolyOxyMethylene (POM). By being reported on the wings, the pads are interchangeable, which facilitates maintenance in case of wear. Alternatively, the lateral interface surface 216a, 216b is formed by the outer cylinder of a roller pivoting about a shaft fixed to the free end of the second arm 213a, 213b and extending in a substantially vertical direction. In this case, the vertical interface surface 217a, 217b can be defined by interchangeable pads.

Subsequently, the term angle of aperture α wings 21a, 21b, the angle formed by the two second arms 213a, 213b. To express this opening angle α, it is possible, for example, to consider the median axis of the second arms. The lower the opening angle, the more the free ends of the second arms are close together. Accordingly, when reducing the opening angle, the pads 215a, 215b come into contact with the front portion 52 of the shoe. The shoe is then engaged with the second front retainer 20. Conversely, when the opening angle is increased, the shoe is released from the second front retainer 20.

To maintain contact between the wings and the boot, the second front retainer 20 comprises a lateral release mechanism 22 cooperating with the wings 21a, 21b. The triggering mechanism 22 is housed inside the frame 31. It comprises a body 223 movable relative to the frame 31 in a substantially longitudinal direction at the stop between at least two stable positions. The translation of the body inside the frame is made by a sliding type connection. The body 223 comprises a cylinder 2231 open at a front end and closed at the rear end by a wall 2232 pierced by an opening 2233. When the body 223 is put in place in the abutment, its front end is located at the end. before the stop and its rear end is placed in front of the wings 21a, 21b. A first elastic means 221 is housed inside the cylinder 2231. this example is a compression spring. A second end 2212 of the spring 221 is in contact with the wall 2232 of the body 223. A first end 2211 of the spring 221 is in contact with a nut 2221. This nut 2221 is engaged with a threaded rod 2223 constituting the extension of 2222. In this embodiment, a portion of the nut extends inside the spring 221, as a portion of the member 2222. This arrangement reduces the bulk of the mechanism. The member 2222 passes through the opening 2233 and thus comprises a rear portion, located outside the cylinder 2231, on the other side of the wall 2232, the side of the wings 21a, 21b. The member 2222 is secured to each free end of the first arms 212a, 212b through the connecting pins 214a, 214b. Indeed, the member 2222 forms, in its rear part, a horizontal plate, extending transversely and pierced laterally, on each side, by an oblong hole in the transverse direction. A connecting pin 214a, 214b passes into each oblong hole. The member 2222 with its extension 2223 and the nut 2221 form a connecting element 222 connecting the wings 21a, 21b with the first elastic means 221.

The operation of this triggering mechanism 22 will now be explained.

In a first configuration, the body 223 is placed in a first stable longitudinal position determined relative to the frame 31. The spring 221 is compressed and exerts a force on the nut 2221 causing its displacement towards the front of the stop. As a result, the connecting element 222 also moves forward which has the effect of the forward displacement of the connecting pins 214a, 214b and therefore of each free end of the first arms 212a, 212b. This results in the rotation of the wings 21a, 21b tending to bring the free ends of the second arms 213a, 213b until the lateral interface surfaces 216a, 216b respectively come into contact with the lateral faces 526a, 526b of the front portion 52 of the shoe. The second retainer before 20 is thus engaged with the shoe. The wings are in contact with the front part of the shoe to keep it attached to the gliding board. In this case, the first resilient means urges the displacement of the connecting element to a position causing the lateral interface surfaces to approach the shoe. In this configuration, the wings form an opening angle α _D.

This first configuration of the trigger mechanism 22 corresponds to the setting of the first configuration of the front stop. It is illustrated in the figures 1 , 3 , 6 , 9 , 12, 13 .

In this first configuration, if a lateral force is exerted on the front of the boot, this force is transmitted to a wing 21a, 21b via the lateral interface surface 216a, 216b. This force causes the rotation of the wing 21a, 21b causing the displacement of the connecting element 222, towards the rear of the stop. This movement then causes compression of the spring 221 via the nut 2221, because the body 223 is held in its first stable longitudinal position determined relative to the frame 31. As a result, the rotation of the wing is directly conditioned to compression of the spring. In other words, the effort necessary to obtain the rotation of the wing of a given angle corresponds to the effort required to compress the spring of a determined race. In order to be able to trigger laterally the boot of the second front restraint 20, the wing must turn by a threshold angle for which the lateral interface surface 216a, 216b bears is no longer in contact with the corresponding lateral face 526a, 526b. of the front part 52 of the shoe. At this threshold angle corresponds a determined spring compression force defining the lateral release threshold value of the second front retainer 20. A wing is in a release configuration when the lateral interface surface associated with the wing no longer interacts with the corresponding lateral part of the shoe.

It should be noted that this threshold value is adjustable by acting on the nut 2221. Indeed, by turning this nut, it moves relatively relative to the member 2222, which has the effect of adjusting the preload value of the spring 221. It follows that to obtain a rotation of a wing of the threshold angle, the threshold force is no longer the same. Therefore, the trigger value of the second front retainer 20 has been modified and adjusted.

As we have stated previously, this construction allows the displacement of the body 223 with respect to the frame 31 in different stable longitudinal positions. For this, the second front retainer 20 comprises an adjustment mechanism 23 for adjusting the relative positioning between the body 223 and the frame 31.

In this example, the adjustment mechanism 23 comprises an actuator 231 pivoting about a shaft 232 supported by the frame 31 of the abutment and extending transversely, close to the lower bearing surface 311. The shaft 232 is located at the rear of the stop, substantially below the interface surfaces of the wings. The actuator 231 comprises a cam 2311 close to the shaft 232 and intended to cooperate with a free end of a longitudinal rear extension 2234 of the body 223. This longitudinal extension 2234 extends towards the rear of the abutment, since the wall 2232 of the body 223 and passes under the wings 21 a, 21 b. The actuator 231 also comprises a tab 2312 extending substantially in a plane parallel to a plane passing through the Y axis ₂₃₂ of the shaft 232.

So that the longitudinal rear extension 2234 of the body 223 remains in contact with the cam 2311, the front stop 3 comprises a second elastic means 14a, 14b making it possible to move the body 223 towards the rear of the abutment when the body is not in position. not asked. In our example, the second elastic means does not act directly on the body as will be seen later. Alternatively, the second elastic means may act on an element belonging to the kinematics between the wings 21a, 21b and the longitudinal extension 2234. For example, it may be a spring acting directly on the body 223.

In this embodiment, the adjustment mechanism 23 provides two stable configurations.

In the first configuration, illustrated in the figures 1 , 3 , 6 , 9 , 12, 13 the actuator 231 is deployed. It is thus oriented so that the tab 2312 extends substantially vertically upwards of the stop and that the cam 2311 cooperates with the longitudinal rear extension 2234 of the body 223 in order to place the body 31 towards the front of the stop, in the first determined stable longitudinal position defined above. This first configuration corresponds to the first configuration of the abutment stop.

In the second configuration, illustrated in the figures 7 , 10 , 14, 15 , 2 , 4, 5 , 8 , 11 , 16, 17 , the actuator 231 is folded. It is thus oriented so that the tab 2312 extends substantially horizontally towards the rear of the stop and that the cam 2311 cooperates with the longitudinal rear extension 2234 of the body 223 to place the body towards the rear of the stop in a second determined stable longitudinal position. This second configuration of the adjustment mechanism 23 is the one used in two configurations of the abutment, the second configuration, referred to as a "foot", illustrated in FIGS. figures 7 , 10 , 14, 15 , and the third configuration, called climb, illustrated in the figures 2 , 4 , 5 , 8 , 11 , 16, 17 . In this second configuration of the adjustment mechanism 23, the tab 2312 is housed in an arrangement 312 provided at the rear of the frame. Thus, the actuator 231 retracts at least partially into the frame 31 which makes the abutment compact. The boot can then be positioned longitudinally towards the front of the abutment while remaining relatively close to the upper surface 41 of the gliding board 4, without being impeded by the actuator 231. In this configuration, the front 52 of the sole is placed above the actuator 231. Advantageously, the actuator 231 is dimensioned so that, in this configuration, an upper part of the actuator serves to support the shoe to position it vertically to facilitate the engagement of the boot with the first front retainer 10.

When the adjustment mechanism 23 is in its first configuration, the body 223 is pushed towards the front of the abutment which has the effect of bringing the free ends of the second arms 213a, 213b, one of the other. This approximation is such that the lateral interface surfaces 216a, 216b are positioned so as to cooperate with the front portion 52 of the shoe. Thus, the shoe front is maintained by the second front retainer 20 when it is paved in the binding. In this configuration, the boot can be released as soon as a determined lateral force is exerted on the front of the boot by means of the lateral release mechanism 22, as previously described.

According to the illustrated embodiment, the tab 2312 of the actuator 231 comprises a longitudinal stop surface 2313 arranged so that, when the adjustment mechanism 23 is in its first configuration, the longitudinal stop surface 2313 is substantially vertical and facing the back of the stop so as to face the front portion 52 of the shoe. Thus, this longitudinal stop surface 2313 serves to wedge the shoe longitudinally which is necessary for the proper functioning of the lateral release mechanism 22.

In a variant, the longitudinal stop surface 2313 is formed by an insert on the actuator 231. This facilitates maintenance in case of deterioration. it also makes it possible to adjust the longitudinal position of the shoe according to the size / sole length or the wear of the sole.

This construction makes it possible to optimize the abutment because the actuator 231 performs a dual function, it makes it possible to activate the adjustment mechanism 23 and to position the shoe longitudinally in the descent configuration.

In this embodiment, the longitudinal stop surface 2313 is fixed on the actuator 231 of the adjustment mechanism 23. Alternatively, it can be secured to another support part, independent of the adjustment mechanism. In this example, the longitudinal stopping surface 2313 is movable relative to the wings 21a, 21b. It can move between an active position for which it is able to cooperate with the front part of the shoe and an inactive position for which it is arranged to no longer cooperate with the front part of the shoe. This construction makes it possible to create a space between the wings when the longitudinal stop surface is in the inactive position. This space may be useful to prevent interference of the shoe with the stop if the shoe is caused to move, for example, if the shoe pivots about a transverse axis. Thus, when the longitudinal stop surface is in the inactive position, the support piece, or actuator, is positioned relative to the first retainer before so that no part of the support piece interferes with the shoe when the it pivots around its axis of articulation, in mounted configuration.

In the example shown, the support piece is retracted into the frame as we have seen previously. The support piece is rotatably mounted relative to the frame and positioned relative to the second front retainer so that the support piece tilts towards the rear of the stop to be housed between the wings, below these, when the longitudinal stop surface is in the inactive position.

The displacement of the longitudinal stopping surface can be a translation, a rotation or a combination of movements.

Alternatively, the tab 2312 also comprises a flange 2314 adapted to partially cover the front portion 52 of the shoe when the adjustment mechanism 23 is in its first configuration. Thus, this flange 2314 may constitute a vertical interface surface for the shoe. This central vertical interface surface can complete the vertical holding of the shoe provided by the vertical interface surfaces 217a, 217b of the pads mounted on the wings. This reinforces the vertical support of the front of the shoe. Alternatively, this central vertical interface surface may allow the removal of the vertical interface surfaces of the pads mounted on the wings, which then support only the lateral interface surfaces. By eliminating the vertical interface surfaces associated with the wings, parasitic friction forces which can disturb the rotation of the wings and therefore the lateral release mechanism 22 are eliminated. In the latter case, we can have a single vertical interface surface formed by the flange 2314. The vertical interface surfaces 217a, 217b are therefore not necessarily supported by the wings 21a, 21b.

In the example described, the actuator 231 comprises an abutment surface 2316, arranged so that, when the adjustment mechanism 23 is in its first configuration, the abutment surface 2316 is substantially vertical and is oriented towards the front of the abutment . This abutment surface 2316 is intended to come into contact with a portion of the frame 31 to wedge the actuator 231 in a stable deployed position corresponding to the first so-called descent configuration.

When the adjustment mechanism 23 is in its second configuration, the body 223 is moved towards the rear of the stop which has the effect of spreading the free ends of the second arms 213a, 213b, one of the other. This spacing is such that the lateral interface surfaces 216a, 216b are positioned so that they can not cooperate continuously with the front portion 52 of the shoe. Thus, the shoe front can not be maintained, at least laterally, by the second front retainer 20, due to the angular orientation of the wings. The boot is released from the second front retainer 20. This can be useful if the skier wants to trigger his fixation in the case where his ski is immobilized in the snow.

In the example described, the actuator 231 comprises a lug 2315 intended to cooperate with the frame 31 to keep the actuator 231 in the folded stable position. This locking is obtained following a slight deformation of the lug 2315 or a part of the frame 31. Alternatively, one can provide other holding means to maintain the actuator 231 in the folded position stable. The lug can be replaced, for example, by a clip. Similarly, the holding means can cooperate with another element of the abutment that the frame.

Thus, the manipulation of the actuator 231 by the user makes it possible to tilt the stop, alternatively, of its first configuration, adapted for the descent, illustrated in FIGS. figures 1 , 3 , 6 , 9 , 12, 13 , in its second or third configuration, adapted to the boot or the climb, as we will see later, illustrated in the figures 7 , 10 , 14, 15 , 2 , 4, 5 , 8 , 11 , 16, 17 . Moving the actuator from a stable deployed position, corresponding to the first configuration of the adjustment mechanism, to a stable folded position, corresponding to the second configuration of the adjustment mechanism, or vice versa, causes the body 223 to move relative to to the frame 31. This displacement modifies the characteristics of the lateral release mechanism 22. Indeed, the lateral force to be exerted on the wings to obtain a given opening angle α of the wings differs from one configuration to another.

The actuation of the adjustment mechanism 23 has the advantage of obtaining different wing openings without the wings being constrained by the trigger mechanism 22.

According to the embodiment described, when the actuator 231 is in the deployed position and the shoe is engaged with the second front retainer 20, the shoe prevents the rotation of the actuator 231 to its folded position. This construction allows therefore the locking of the actuator 231 by the boot when it is engaged with the binding. Securing is then secured that the body 223 remains in a stable position, which makes it possible to retain the characteristics of the lateral release mechanism 22.

It is the same in mounted configuration, the shoe prevents the rotation of the actuator 231 to its fully deployed position.

Thus, when the shoe is engaged with the first or second front restraint, the shoe limits the movement of the actuator 231. This avoids the modification of the characteristics of the lateral release mechanism 22 when the stop is configured to a practice: ascent or descent.

In an alternative solution, the actuator causing the displacement of the body 223 is designed and arranged differently. For example, the actuator is placed at the front of the stop and movable by a voluntary action of the skier, distinct from the movement of the shoe, while the shoe is engaged with the second front retainer 20. This solution allows to change the characteristics of the lateral release mechanism 22 while the shoe is engaged with the second front retainer 20. This may be useful to release the shoe when the ski is immobilized in the snow.

In the illustrated embodiment, the second front retainer 20 comprises a positioning mechanism 24 for adjusting the opening angle α of the wings. This positioning mechanism 24 is intended to be used when the adjustment mechanism 23 is in its second configuration.

This positioning mechanism 24 comprises a shuttle 241, a rocker 242 and a lever 243.

The shuttle 241 is movable longitudinally relative to the frame 31. It forms a bent plate shaped "U". The central wall 2411 of the plate is placed under the body 223 and the two lateral parts 2412a, 2412b of the plate extend upwards, on either side of the body 223. The central wall 2411 comprises two tabs 2413a, 2413b extending rearward of the stop. Each end of the tabs 2413a, 2413b has a hole in which passes respectively a connecting pin 214a, 214b. Thus, the translation of the shuttle causes the translation of the pins, which causes the wings _21a , _21b to rotate about their axes of rotation Z _211a , Z _211b . If the shuttle moves forward of the stop, the opening angle α wings, that is to say the angle between the second arm 213a, 213b, decreases. Conversely, the movement of the shuttle towards the rear of the stop causes the increase of the opening angle α of the wings. Note that the movement of the shuttle does not cause the displacement of the body 223. The positioning mechanism 24 is dissociated from the adjustment mechanism 23. It operates independently of one another.

The rocker 242 is pivotally mounted about a first pivot shaft 244 supported by the frame 31 of the stop and extending transversely. The rocker 242 forms an inverted U-shaped folded plate extending longitudinally. The central wall 2421 of the plate covers an upper part of the body 223 and the side walls 2422a, 2422b of the plate extend vertically, downward, on both sides of the body. The first pivot shaft 244 passes through the two side walls 2422a, 2422b, near the central wall and the rear longitudinal end of the plate. Each sidewall includes an extension 2423a, 2423b extending vertically downward below the first pivot shaft 244 at the rear longitudinal end of the plate. The rocker 242 and the shuttle 241 are arranged so that each extension 2423a, 2423b can cooperate with the lateral parts 2412a, 2412b of the shuttle 241 so that the rotation of the rocker 242 causes the translation of the shuttle 241. In other words, with this construction, when raising the front longitudinal end of the rocker 242, causes the movement of the shuttle 241 forward which has the effect of closing the wings 21a, 21b in the direction of the shoe. Conversely, when the front longitudinal end of the rocker 242 is lowered, the shuttle 241 is caused to move rearwardly, which has the effect of opening the wings 21a, 21b away from the shoe.

Thus, the opening angle α of the wings 21a, 21b depends directly on the angular position of the rocker 242. Accordingly, for a given angular position of the rocker corresponds an opening angle α wings 21a, 21b determined.

Elastic means 245 are interposed between the rocker 242 and the frame 31 so as to rotate the rocker until it abuts against the frame. This stable rest configuration corresponds to a lowering of the longitudinal front end of the rocker 242 and therefore to a large opening of the wings 21a, 21b.

To modify the opening angle α of the wings, the positioning mechanism 24 comprises a lever 243 pivotally mounted about a second pivot shaft 246 supported by the rocker 242. The second pivot shaft 246 extends transversely and passes through the two side walls 2422a, 2422b of the rocker 242, near the central wall 2421 and the front longitudinal end of the plate. The lever 243 forms a fork whose arms 2431a, 2431b extend on either side of the rocker 242. Each arm 2431a, 2431b is traversed in its middle by the second pivot shaft 246. Each free end of the 2431 a fork, 2431 b of the fork is intended to cooperate with a portion of the frame 31 when the lever is in a determined locking position. The lever 243 is dimensioned so that when its free ends cooperate with the frame, it causes the upward displacement of the front longitudinal end of the rocker 241 and thus the rotation of the rocker a given angle. As a result, the wings 21a, 21b close in the direction of the shoe, as explained above. The lever 243 can also take a configuration for which it does not cooperate with the chassis. In this case, the rocker rotates around the pivot shaft 242, thanks to the elastic means 245, to return to the stable rest configuration described above.

The lever 243 may comprise a return means, for example, a torsion spring, to bring it back to a position for which it does not cooperate with the frame.

In the embodiment described, the free ends of the arms 2431 a, 2431 b of the lever 243 each comprise a notch, each tooth recess being intended to cooperate with the same complementary shape formed on the frame. The notching is designed so that for each cooperation between a recess and the complementary shape corresponds to a specific upward movement of the front longitudinal end of the rocker 241 and therefore the rotation of the rocker a given angle. This design therefore makes it possible to obtain an angular adjustment of the opening of the wings 21a, 21b which is finer, with several values of opening angle α determined.

To obtain an opening angle α of wings 21a, 21b desired, it is sufficient to actuate the lever 243 to bring it into a predetermined configuration. This construction has an additional feature. The cooperation between each extension 2423a, 2423b of the rocker 242 with the lateral parts 2412a, 2412b of the shuttle 241 has the consequence of locking the opening of the wings. Thus, for a given configuration, the wings 21a, 21b can be closed by an action on the back of these but we can not open them further. This specificity annihilates the lateral triggering mechanism 22.

However, when the adjustment mechanism 23 is in its first configuration, descent configuration, the shuttle 241 is moved forward which has the effect of suppressing the cooperation between each extension 2423a, 2423b of the rocker 242 with the side portions 2412a , 2412b of the shuttle 241. This suppression of interaction between the rocker and the shuttle induces the deactivation of the positioning mechanism 24, in descent mode. This makes it possible to secure the operation of the trigger mechanism because of an involuntary action on the lever 243. Without this deactivation, an action on the lever would cause the opening or locking of the wings via the positioning mechanism 24. Thus, in this case, there is no locking of the opening of the wings possible. These can be opened by lateral loading. The lateral release mechanism 22 is then functional.

The first front retainer 10 will now be described in more detail.

In this example, the first front retainer 20 comprises two supports 12a, 12b, each being pivotally mounted respectively about an X axis _13a , X _13b of a shaft 13a, 13b supported by the frame 31 of the abutment and s extending longitudinally, on either side of the median longitudinal axis X ₃ of the abutment. Each support 12a, 12b comprises a support arm 121a, 121b articulated at a first end, about the X axis _13a , X _13b , the second end being free. A hooking means 11a, 11b is secured to the inner portion of the second end of the support arm 121a, 121b, that is to say, the portion facing the median plane M of the stop. The attachment means may be an insert which facilitates its replacement in case of wear or it can be part of the support arm which reduces the number of parts and makes the stop more economical. In the latter case, the attachment means and the support arm form a single piece. The two hooks 11a, 11b are intended to cooperate with the front portion 52 of the shoe 5 so as to define a hinge axis Y ₁₁ , substantially transverse to the stop, around which can rotate the shoe. In this example, each attachment means 11a, 11b is in the form of a tip whose end portion is housed respectively in a recess 521a, 521b placed on a lateral side of the front portion 52 of the shoe, when the first front retainer 10 is in mounted configuration. From the construction, the points are faces, they are vis-à-vis. The tips are aligned to form the hinge axis Y ₁₁ , when the first front retainer 10 is in mounted configuration. An elastic means 14a, 14b is associated with each support 12a, 12b. This elastic means 14a, 14b acts on the corresponding carrying arm 121a, 121b to rotate it so that the second end moves away from the median plane M of the stop. In this example, the elastic means is a torsion spring comprising an end secured to the frame 31 and the other end bears on a central inner portion of the support arm 121a, 121b.

In this embodiment, the support arms 121a, 121b are arranged longitudinally between the second arms 213a, 213b of the wings 21a, 21b. This arrangement is such that each wing 21a, 21b limits the rotation of a corresponding carrying arm 121a, 121b. Thus, the outer portion of each support is intended to be in contact with an inner portion of a second arm 213a, 213b. This contact is continuous through the elastic means 14a, 14b.

With this construction, each resilient means 14a, 14b exerts a force on the carrier arm 121a, 121b associated with tending to separate the second ends and thus to separate the attachment means 11a, 11b one of the other. This force is transmitted to the wings through the contact of the support arm with the second arms. As a result, the resilient means urges the wings to open. The more the wings are closed, the greater the stress.

In the embodiment described, these elastic means 14a, 14b correspond to the second elastic means for moving the body 223 towards the rear of the stop when the body is not stressed.

Moreover, if the opening angle α of the wings 21a, 21b is limited via the positioning mechanism 24, as previously described, then the rotation of the supports 12a, 12b is blocked. The maximum spacing between the attachment means 11a, 11b is then controlled.

The first front restraint 10 can be adjusted in two configurations: a climb configuration and a ride configuration.

The rise configuration of the first front retainer 10 corresponds to the third configuration of the stop. It is illustrated in the figures 2 , 4 , 5 , 8 , 11 , 16, 17 . It is characterized by a spacing W _11M attachment means 11a, 11b such that they cooperate continuously with the front portion 52 of the shoe. In this case, the end portions of the tips are sufficiently close together to remain in the recesses 521 a, 521 b of the front part of the shoe. To maintain this cooperation, we limit the spacing of the points by limiting the opening of the wings 21a, 21b. In the embodiment described, it suffices to act on the lever 243 of the positioning mechanism 24 to obtain an angle of opening α _M wings determined.

The boot configuration of the first front retainer 10 corresponds to the second configuration of the stop. It is illustrated in the figures 7 , 10 , 14, 15 . It is characterized by a spacing W _11C attachment means 11a, 11b such that they can be released from the front portion 52 of the shoe. In this configuration, the shoe is not held by the stop at the gliding board. In this example, the spacing of the end portions of the tips is greater than the distance between the entrances of the recesses 521 a, 521 b of the front part of the boot. This distance corresponds substantially to the width of the front portion of the shoe. To obtain this release, greater spacing of the tips is allowed by increasing the opening of the wings 21a, 21b. For this, in the embodiment described, it suffices to act on the lever 243 of the positioning mechanism 24 to obtain an angle of opening α _c wings determined more important.

According to the embodiment described, the supports 12a, 12b are sized and arranged relative to the wings 21a, 21b so that when the stop is in its first configuration, that is to say that the shoe is in contact with the lateral interface surfaces 216a, 216b, the support arms 121a, 121b pivot to be housed between the wings 21a, 21b, without interfering with the front portion 52 of the shoe or with a member of the stop. The supports are also dimensioned and arranged so as not to disturb the movement of the front part of the boot during a lateral release of the boot. The carrier arms 121a, 121b are sufficiently advanced relative to the location of the lateral interface surfaces 216a, 216b to not interfere with the introduction of the boot in the second front retainer 20 or its release. This arrangement provides a compact front stop, incorporating two front restraints, one for the rise and one for the descent. Furthermore, it protects the first restraint before 10, when the stop is in the descent configuration. Indeed, the organs of the first front retainer 10 are housed between the wings 21a, 21b, which provides protection.

According to the embodiment described, the hooking means 11a, 11b are arranged relative to the wings 21a, 21b so that the distance H ₁₁ between the hinge axis Y ₁₁ and the bearing surface lower 311 is less than or equal to the distance H ₂₁₇ between the vertical interface surfaces 217a, 217b and the lower bearing surface 311. This feature allows to place the shoe close to the sliding surface 42 of the gliding board, during the rise phases. However, this approximation significantly improves the stability of the skier and his performance during the ascent of the slope.

According to one example, the arrangement of the hooking means 11a, 11b relative to the vertical interface surfaces 217a, 217b is such that the distance between the distance H _51D between the sole 51 and the lower bearing surface 311, when the stop is in its first configuration (downhill), and the distance H _51M between the sole 51 and the lower bearing surface 311, when the stop is in its third configuration (mounted) is less than ten millimeters.

According to the embodiment described, the hooking means 11a, 11b are arranged relative to the wings 21a, 21b so that the longitudinal position of the shoe when it is engaged with the first front retainer 10, according to the embodiment the third configuration of the abutment (mounted) is shifted forwardly of the abutment with respect to the longitudinal position of the boot when it is engaged with the second front retainer 20, according to the first configuration of the abutment ( descent). Advantageously, the gap L5 between these two longitudinal positions is greater than eight millimeters, preferentially, the difference is greater than twelve millimeters. This feature is particularly important because it allows to switch the configuration of the binding, a climbing configuration to a descent configuration, or vice versa, without the need to move the heel or the stop. Indeed, with a suitable movement, the heel of the shoe is no longer positioned to cooperate with the attachment mechanism of the heel. This is what is sought when switching to climb mode, mode for which the shoe must be able to pivot about a transverse axis placed at the front of the shoe. In addition, it allows to retreat the boot relative to the ski during the downhill phases, which is of interest when moving off-piste, including powder snow. In these conditions, it is better to ski backwards so that the front spatulas do not get stuck in the snow.

Other first front restraints 10 may be contemplated.

According to a first example, each support of an attachment means may be rotatably mounted about a substantially vertical axis. In a variant, the supports can pivot about the same axes of rotation as those of the wings. In another variant, the supports can pivot about the same axes of rotation as those of the connecting pins. A support can thus pivot about a fixed axis relative to the frame or relative to a wing.

The preceding embodiments describe supports pivoting respectively about an axis of rotation. In an alternative solution, the supports are not articulated. The spacing of the attachment means results from a deformation of a portion of the support. In this case, a support arm pivots around a virtual "axis of rotation" due to the deformation of the arm. The axis of rotation must be extrapolated because it does not really exist. It is deduced from the deformation of the support.

In the proposed solutions, each attachment means is movable independently of the wings. This construction makes it possible to have a dimensioning adapted for each front restraint 10, 20. More particularly, this makes it possible to optimize the dimensioning of the first front restraint 10 provided for the rise. This one can be designed not to undergo strong stresses by springs as it is the case in most of the forward restraints provided for climbing. Due to the fact that the supports are not very constrained, these can be lightened. In addition, it is easier to exchange a defective part without simultaneously affecting the two front restraints.

The forward stop, in these embodiments, comprises a first front retainer comprising two supports, each support comprising a carrying arm supporting a hooking means. The attachment means may form a portion of the support arm. Advantageously, each carrier arm is able to come into contact respectively with a resumption element of the stop, the recovery elements being able to be arranged to maintain a relative spacing W _11M between the attachment means when they cooperate with the front part of the shoe. In this case, the stop comprises two recovery elements, each cooperating respectively with a carrying arm. Other variants may be considered. For example, the recovery element may be a one-piece piece cooperating simultaneously with the two carrying arms, for example a fork. The recovery element or elements are then able to cooperate with at least one carrier arm of a support so as to limit the spacing of the attachment means of a determined value W _11M . Thus, the hooking means can not deviate from each other beyond the determined value, but they can eventually get closer. The retrieval member may be provided to prevent only spacing or to prevent spacing and reconciliation.

To obtain this limitation of movement of the attachment means, the recovery element or elements are placed relative to the supports so as to interfere with the movement of the supports. In other words, the recovery elements form stops for the supports. Cooperation is direct. Preferably, a recovery element cooperates with a support at a recovery surface located on the same support arm of the support on which is fixed the attachment means and, preferably, near the attachment means. According to one embodiment, at its second free end, the support arm supports a fastening means, in its inner part and, in the back, in its outer part, the support arm forms a recovery surface adapted to come into contact with the recovery element. Thus, the recovery surface is at the level of the attachment means.

This construction thus allows a lateral force recovery directly by the elements of recovery when the shoe is engaged with the first front retainer. In this case, there is little or no recovery of the lateral force by the carrying arms. In other words, during the climbing phases, a mechanism makes the attachment means cooperate with the front part of the boot. A specific device positions and immobilizes the recovery elements so as to block the relative spacing between the attachment means. It is thus possible to maintain the cooperation between the attachment means and the front part of the boot without the attachment means exerting a force on the shoe. Alternatively, it is possible to provide a very slight load on the attachment means on the shoe, an effort less than six daN. In the prior art, the attachment means strongly solicit the shoe, often greater than ten daN. The lateral support of the boot when it is engaged with the first front retainer is ensured by a direct recovery with the stopper of the stop member. This solution has the advantage of considerably reducing the wear of the fastening means and / or corresponding inserts of the shoe. In addition, the dimensioning of the device can be adapted and, more particularly, the sizing of the supports. Finally, by decreasing the forces exerted by the attachment means on the shoe, it reduces the stresses of parasitic friction that can disrupt the rotation of the shoe during climbing phases.

According to one embodiment, the recovery elements are mobile. They can be positioned so that they cooperate with the support arms of the supports in order to maintain a relative spacing between the attachment means when they cooperate with the front part of the shoe. They can also be positioned so that the support arms can move so that the attachment means can deviate further.

The elements of recovery can be a single piece monolithic.

The recovery elements can be removable or integral with the stop.

In the embodiment described, the elements of recovery are made by the wings of the second front retainer. By bringing the wings together, these acting directly on the support arms supporting the attachment means which causes the approaching means to approach until they cooperate with the shoe. Then, by blocking the opening angle α of the wings, it blocks the spacing of the attachment means. The shoe is then engaged with the first front retainer provided for the climb without the attachment means solicit the shoe.

In another variant, the attachment means 11a, 11b are integral with the wings 21a, 21b and arranged so that the distance H ₁₁ between the hinge axis Y ₁₁ and the lower bearing surface 311 of the frame 31 of the abutment is less than or equal to the distance H ₂₁₇ between the vertical interface surfaces 217a, 217b and the lower bearing surface 311. In this case, the first and second front retainers share common parts. The support of the attachment means is directly the wing. Advantageously, the attachment means 11a, 11b are offset forwardly with respect to the longitudinal stop surface.

In the previous embodiments, one wing is movable relative to the other. This allows the change of one wing without having to change the other.

According to one variant, the two wings pivot about the same axis of rotation. The axes of rotation Z _211a and Z _211b are then merged. This common axis can be substantially vertical.

In addition, the two wings are kinematically linked so that the rotation of one wing in one direction causes the rotation of the other wing in the other direction. This feature allows you to open the wings quickly to release the shoe.

In the examples described, the hooking means are points cooperating with recesses arranged on the front part of the shoe, generally on an insert reported. However, other embodiments can be envisaged for the first front retainer as soon as they define an axis of articulation Y ₁₁ around which the boot can pivot. For example, the tips may be cylinders or the front portion may support a shaft to connect to the stop.

As mentioned above, the actuator 231 comprises a bearing surface intended to come into contact with the sole of the shoe. This bearing surface makes it possible to position the shoe so that the vertical position of the entrances of the recesses 521 a, 521 b of the front part of the boot are substantially at the same level as the vertical position of the hooking means 11a, 11 b. This bearing surface then constitutes a boot aid facilitating the engagement of the boot with the first front retainer 10.

The description describes a trigger mechanism, a setting mechanism and a positioning mechanism. The solutions described are not restrictive. The invention extends to other solutions of trigger mechanisms, adjustment or positioning compatible with the claims of the invention.

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

The invention also extends to all the embodiments covered by the appended claims.

Claims (14)

Front stop (3) of a binding of a shoe on a gliding board (4) comprising: a first front retainer (10) of the boot intended for slope climbing, said device comprising attachment means (11a, 11b) for the boot defining an articulation axis (Y ₁₁ ) around which pivots the shoe when the front stop is in a mounted configuration; a second front retainer (20) of said boot intended for the descent, said device comprising two wings (21a, 21b), each wing supporting a lateral interface surface (216a, 216b) adapted to come into contact with a front portion (52) of the boot when the front stop is in a downhill configuration; - A longitudinal stop surface (2313) movable between an active position for which it is adapted to cooperate with the front portion of the shoe and an inactive position for which it is arranged to be unable to cooperate with the front part of the shoe ;
characterized in that
the longitudinal stop surface (2313) is movable relative to the wings. Front stop (3) according to claim 1, characterized in that one wing (21a, 21b) is movable relative to the other (21b, 21a). Front stop (3) according to one of the preceding claims, characterized in that the displacement of the longitudinal stop surface is a translation or a rotation or a combination of movement. Front stop (3) according to one of the preceding claims, characterized in that the stop surface is integral with a movable support piece (231). Front stop (3) according to the preceding claim, characterized in that the longitudinal stop surface is formed by an insert on the support piece (231). Front stop (3) according to one of the preceding claims 4 or 5, characterized in that when the longitudinal stop surface is in the inactive position, the support piece is positioned relative to the first retainer before so that no part of the support part interferes with the shoe when the latter pivots about its hinge axis, mounted configuration. Front stop (3) according to one of the preceding claims 4 to 6, characterized in that the support piece is rotatably mounted relative to a frame (31) and positioned relative to the second front retainer so that the support piece tilts towards the rear of the stop to be housed between the wings, below these, when the longitudinal stop surface is in the inactive position. Front stop (3) according to the preceding claim, characterized in that the support member comprises a stop surface (2316) adapted to come into contact with the frame for positioning the longitudinal stop surface in the active position. Front stop (3) according to one of the preceding claims 4 to 8, characterized in that the support part comprises a flange (2314) adapted to partially cover the front portion of the boot. Front stop (3) according to one of the preceding claims 4 to 9, characterized in that the support member comprises a holding means (2315) intended to cooperate with a member (31) of the stop to hold the support piece in position folded stable. Front stop (3) according to one of the preceding claims 4 to 10, characterized in that the support part forms an actuator (231) of an adjusting mechanism (23). Front stop (3) according to the preceding claim, characterized in that the adjustment mechanism (23) allows to separate the wings of the second front retainer. Front stop (3) according to one of the preceding claims, characterized in that the longitudinal stop surface is in the active position when the front stop is in a downward configuration. Sliding apparatus (1) characterized in that it comprises a front stop (3) as defined in the preceding claims.

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