WO2011124785A1

WO2011124785A1 - Binding for the practice of skiing

Info

Publication number: WO2011124785A1
Application number: PCT/FR2011/000190
Authority: WO
Inventors: Laurent Marechal; Pierre Szafranski; Jean-François Merino
Original assignee: Salomon S.A.S.
Priority date: 2010-03-31
Filing date: 2011-03-30
Publication date: 2011-10-13
Also published as: FR2958173B1; US20130026736A1; FR2958173A1; EP2552559A1

Abstract

The invention relates to a binding (1) for a boot (3) on a ski (2) including a front abutment (300, 300b), a connection member (200, 200b) having a front end which is secured to the ski (2), and a rear end, the connection member being provided with a hooking means (203, 204), a rear base (100) to be attached to the ski (2) and a hooking mechanism (600, 600b) combined with the rear base (100). The hooking mechanism (600, 600b) includes a gripping member (601, 602, 603) which is movable with respect to the rear base (100) and which can be moved into a first position in which engages with the hooking means (203, 204) of the connection member (200, 200b) in such a manner as to limit a vertical movement of the rear end of the connection member (200, 200b), and a first return member (650) exerting a force on the gripping member (601) in such manner as to move the latter towards the front abutment (300, 300b). The binding also includes a heelpiece (700) connected to the rear portion (205) of the connection member (200, 200b). The longitudinal position of the heelpiece (700) is adjustable with respect to the connection member.

Description

FIXING FOR SKI PRACTICE

The invention relates to a shoe binding on a ski and more particularly the practice of alpine skiing.

When skiing in downhill skiing or ski touring, the bending behavior of the ski is essential. We then speak of "flex" to qualify all the bending dimensions of a ski. The "flex" then determines the ski's character, its dynamism, its nervousness. Consequently, a ski should preferentially be characterized by a maximum of flexion around a transverse axis of the ski.

Given the rigidity of the shoe and in particular its sole, the "flex" of the ski is bad if the front stop and the heel are attached directly to the ski. Indeed, this construction provides rigidity limiting the flexion of the ski when it is in support of the front and rear of the ski. The weight of the skier generates constraints on the points of attachment of the front stop and the heel which can damage the ski and / or the elements of the binding.

To overcome this drawback, it is known to add an elastic element between a body of the heel supporting a shoe holding mechanism and a fastening part integral with the ski. The elastic means exerts on the body of the heel a recoil force, in the direction of the front stop, along an axis substantially longitudinal to the ski. The elastic element is conventionally a recoil spring that allows to remove the heel of the front stop in case of bending, as in the case previously seen. The flex is improved.

The position of the fastener is generally variable along a longitudinal axis which allows to adjust axially the position of the heel.

Such a construction is for example illustrated in patent applications WO 2008/125363 and FR-A-2,831,455.

Although this design provides flexibility to the ski, it is limited to only moving the body of the heel.

The patent application EP-A-1 559 455 describes a binding for the practice of ski touring comprising a front stop and a heel, mounted on a plate, without possibility of axial separation of the abutment relative to the heel. The heel is secured to a support pivotally mounted about a central vertical axis disposed between the front stop and the heel. A shoe rests directly on this pivoting support. This set of fixation is rigid in flexion around an axis transverse to the ski. The adaptation of the binding to different sizes of shoes is not possible. This structure further includes a thick plate under the shoe. The fastening system is complex for the boot and / or heaving.

In downhill configuration, to provide flexibility, the end of the plate is secured to the ski via a lock pushed by a spring, the spring pressing on a fixed support on the ski. This elastic element makes it possible to keep the latch in continuous contact with the end of the plate during a bending of the ski.

This construction is also limited to a single axial compensation means. This attachment does not allow a large longitudinal movement of the end of the plate.

The object of the invention is to provide a shoe attachment on an improved ski.

One purpose is to obtain a simple fastening structure, lightweight and not bulky, especially in the thickness under the sole of the shoe.

Another object of the invention is to improve flexibility in flexion to a ski equipped with a binding and a shoe. This allows to obtain a greater movement of the ski without constraining strongly.

Another object of the invention is to obtain a bending behavior of the non-linear ski, as a function of the evolution of the load.

The invention thus relates to a boot binding on a ski comprising:

- a front stop;

- A junction member having a front end secured to an upper surface of the ski and a rear end, the connecting member being provided with a hooking means;

a rear base intended to be fixed to the ski,

a hooking mechanism, associated with the base, comprising:

a movable gripping member with respect to the rear base and being able to be placed in a first locking position for which it cooperates with the hooking means of the junction member so as to limit a vertical displacement of the end rear of the connecting member;

a first return member exerting a force on the gripping member so as to move it towards its first locking position.

The binding is characterized in that it comprises a heel piece connected to the rear part of the junction member, the axial position of the heel piece relative to the junction member being adjustable.

The axial adjustment makes it possible to adapt the spacing between the front stop and the heel to the size of the shoe. This adjustment induces less stress on the elements of the binding and provides flexibility to the ski.

The improvement in ski flexibility is also marked by the addition of a second axial compensation, namely an elastic means in addition to the return member. Thus, the mechanism for the axial adjustment of the heel comprises an elastic means housed between a body of the heel support supporting a shoe holding mechanism and a fastener integral with the junction member, the elastic means exerting on the body of the heel a recoil force, in the direction of the front stop, along a substantially longitudinal axis to the junction member. The invention also relates to any technically permissible combination of the following features:

- The recoil force is adjustable by a first adjustment means.

- The first return member exerts on the hooking means of the junction member a compensating force, in the direction of the forward stop, along an axis substantially longitudinal to the ski.

- The compensation force is adjustable by a second adjustment means.

- The front stop is pivotally mounted about an axis transverse to the ski.

The front stop is fixed relative to a front base fixed to the ski.

The connecting member is flexible about an axis transverse to the ski.

The gripping member is located at the level of the heel or between the heel and the front stop.

The gripping member comprises at least one hook adapted to cooperate with at least one arrangement of the junction member, the arrangement forming the hooking means.

The gripping member comprises at least two hooks arranged on either side of a median plane of the rear base.

The invention aims in particular bindings for the practice of ski touring.

Such a fastening must allow rotation of the boot around an axis transverse to the ski located at the front of the boot during the climbs, so as to make it possible to move the heel of the user relative to the ski to exert a optimal thrust effort. Such a binding must also make it possible to absorb significant torsional forces between the boot and the ski during the downhill phases.

An example of a mount for hiking is disclosed in EP-A-1 892 020. This safety binding consists of a plate carrying the boot, pivotally mounted on the ski at the front and provided at the rear with connecting means. to the detachable ski. This binding is intended for use with rigid alpine ski boots that are attached to the pivoting plate. A front stop and a heel are attached to this plate to ensure the maintenance of the shoe or heaving if necessary. In the up position, the pivoting plate is released from the ski at the rear so as to allow pivoting of the boot relative to the ski. In the descent position, the pivoting plate is secured to the ski so as to allow the practice of skiing according to alpine descent techniques. The means for connecting the plate to the ski are not described in this document.

Such a binding is in practice cumbersome and weighs significantly the ski. Furthermore, there is a need for connection means of the plate to the ski of simple handling both for the passage in the mounted position for the passage down position. There is also a need for connection means optimizing the transmission of forces between the boot and the ski while allowing the flexion of the ski. The fixation must in particular be able to provide a solid connection of the boot to the ski and be strong enough to withstand the forces generated during the practice of ski touring, while being sufficiently light.

The invention aims to solve one or more of these technical problems. Thus, advantageously, the hook mechanism for alternately fixing and releasing the base and the rear portion of the junction member further comprises:

a retaining member secured to the rear base, the retaining member being movably mounted between first and second positions with respect to the rear base, the retaining member having an actuating surface intended to be manipulated by the user to move from its first to its second position, the first position of the retaining member releasing the passage of the gripping member from its second position to its first position, the second position of the organ of now retaining the gripping member in its second position;

- A release member having an actuating surface to be manipulated by the user, the biasing of the actuating surface axially driving the gripping member to the second position.

The invention also relates to any technically permissible combination of the following features:

The safety fastener comprising a second return member biasing the retaining member towards its second position.

A retractable abutment holds the gripping member in its first position in the absence of biasing the release member, and releases the sliding of the gripping member from its first position to its second position when an axial force is applied to the actuating surface of the release member.

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:

- Figure 1 is a perspective sectional view of a ski connecting member and a rear base for an example of attachment according to the invention, in the mounted position;

- Figure 2 is a perspective view of a connecting member and a rear base for a mounting position of the fastener;

- Figure 3 is a perspective sectional view of a ski connecting member and a rear base, in the down position;

- Figure 4 is a perspective view of the lower portion of the rear base of the fastener; - Figure 5 is a perspective view of a locking member of the rear base;

- Figure 6 is a perspective view of an actuating member of a locking mechanism;

- Figure 7 is a perspective view from above of the rear base in the mounted position;

- Figure 8 is an axial sectional view of the components of the rear base in the mounted position;

- Figure 9 is a perspective view from above of the rear base in an intermediate position of passage in the down position;

- Figure 10 is a perspective view from above of the rear base in the down position;

- Figure 11 is an axial sectional view of the components of the rear base in the down position;

- Figures 12 and 13 are side sectional views of the locking mechanism during different phases of locking.

- Figure 14 is a rear perspective view of a complete attachment according to the first embodiment;

- Figure 15 is a partial axial sectional view along the section line AA of Figure 1 of a ski equipped with the complete attachment according to the first embodiment, in the down position;

- Figure 16 is a partial axial sectional view similar to Figure 15 of a ski equipped with a complete attachment according to a second embodiment, without bending the ski;

- Figure 17 is a partial axial sectional view similar to Figure 15 of a ski equipped with the complete attachment according to the second embodiment, with flexing of the ski;

The following reference frame illustrated in Figure 1 will be used in the following description. The direction X corresponds to the axial or longitudinal direction of the ski 2 on which the attachment is mounted. The direction Y corresponds to the transverse direction of the ski 2, and the direction Z corresponds to the vertical direction of the ski 2.

Figures 1 to 15 illustrate a first embodiment dedicated to the practice of ski touring. This attachment comprises a connecting member pivoting relative to the ski 2. A hooking mechanism 600 allows to fix or release alternately the rear part of the connecting member and a base attached to the ski 2.

Thus, a very simple kinematics to be implemented by the user makes it possible to go from the mounted position to the downward position of the attachment. Such a hook mechanism has a simple and compact structure which is easy to focus. Figure 1 is a perspective view of the main components of a safety binding 1 for the practice of ski touring. The attachment 1 comprises a front base 400, a front stop 300 (the internal mechanism of which is not illustrated for reasons of readability), a connecting member 200, a heel piece 700 (not shown in FIG. readability) and a rear base 100.

The front plates 400 and rear 100 are intended to be fixed to a ski 2 rigidly. The connecting member 200 is pivotally mounted relative to the front base 400 around a Y direction axis. For this purpose, the connecting member 200 is rotatably mounted via the front stop 300 around an axis 502 extending between two faces of a stirrup of the base 400.

The front stop 300 is fixed to the front end of the connecting member 200. The front stop 300 has a support 301 for the sole of a ski boot 3 of the user. The heel 700 is fixed on a plate 205 forming the rear portion of the connecting member 200. The front stop 300 and the heel 700 are thus axially offset to allow the insertion of the shoe 3 of the user. The front stop 300 and the heel 700 allow in a manner known per se to maintain the shoe 3 vertically of the user when it is inserted into the binding. The axial position of the heel 700 with respect to the connecting member 200 can be adjusted in a manner known per se. For this purpose, the plate 205 of the connecting member 200 has a rail 201 allowing axial sliding of the heel piece 700, and an indentation 720 making it possible to immobilize the axial position of the heel piece 700 via a known mechanism. in itself integrated in the heel 700.

A heel 700 classic, as mentioned above, is illustrated through Figures 14 and following. The heel 700 comprises a body 701 supporting a shoe holding mechanism 3. A part of this body forms a slide 702 cooperating with the rail 201 so as to allow the axial translation of the heel piece 700. The body 701 of the heel piece supports also an adjusting screw 710.

The axial positioning of the heel piece 700 is obtained by means of a mechanism comprising the adjusting screw 710, integral axially with the body 701 of the heel piece, in engagement with the indent 720 of the junction member 200. Thus, by screwing, it causes the axial displacement of the adjusting screw 710 along the indentation 720 and therefore, consequently, the axial displacement of the heel piece 700. For a binding for alpine skiing, the indentation 720 is generally directly attached to the ski .

The heels 700 for the practice of downhill skiing are often equipped with an axial compensation allowing to bring more flexibility to the ski and to cover a slight variation of size. This axial compensation is simply achieved by interposing a resilient means 750 between the body 701 of the heel and the adjusting screw 710. Thus, the body 701 of the heel can be translated axially rearward until the total compression of the means elastic. The kinematics of a rearward movement of the heel is as follows: the body 701 bears on the spring 750 which then presses the adjusting screw 710, the latter being locked axially via the indentation 720. In the other direction, the forward movement of the heel piece 700 is limited by the contact between a shoulder of the adjusting screw and a stop of the body of the heel piece. As a result, when the heel 700 is not stressed, that is to say in its idle state, the elastic means 750 is slightly compressed, which allows to obtain the contact described above.

The elastic means 750 is generally a spring. The axis of the elastic means 750, the axis of the adjusting screw 710 and the axis of the ski are substantially aligned.

Thus, with this design, the adjusting screw 710 can only rotate about its axis or move axially (by compressing the elastic means 750) relative to the body 701 of the heel piece 700.

In the position illustrated in Figure 1, the attachment 1 is in the up position. Thus, the rear end of the connecting member 200 is disengaged from the rear base 100 to allow the pivoting of the user's foot relative to the ski.

A hook mechanism 600 makes it possible to fix and release the base 100 of the rear portion of the junction member 200 alternately. The hook mechanism 600 comprises hooks 602 and 603. The hooks 602 and 603 form an element The hooks 602 and 603 are made in one piece with a link 601 slidably mounted axially relative to the base 100. The link 601 is slidably mounted relative to the base 100 by through a hoop 605 integral with the base 100 and overhanging the middle part of the link 601. Via the link 601, the hooks 602 and 603 are mounted to slide axially relative to the base 100 between first and second positions.

In the first position illustrated in Figure 3, the hooks 602 and 603 are in the advanced position, which corresponds to a lowering position of the attachment 1. In the second position illustrated in Figures 1 and 2, the hooks 602 and 603 are in the retracted position, which corresponds to a mounting position of the attachment 1.

Trees 203 and 204 are fixed transversely to the connecting member 200. The shafts 203 and 204 are arranged substantially vertically above the hooks 602 and 603 respectively. The shafts 203 and 204 form a hooking means integral with the base 100. The joining member 200 has openings 624 and 625 disposed vertically above the hooks 602 and 603. The openings 624 and 625 allow the hooks 602 and 603 to slide relative to the connecting member 200 when the it is pressed against the base 100.

In Figures 1 and 2, the hooks 602 and 603 are in their second, retracted position. The hooks 602 and 603 are not coupled to the shafts 203 and 204, so that the rear part of the connecting member 200 is released from the base 100. The connecting member 200 can thus pivot with respect to the front base 400. The attachment 1 is then in the up position. In Figure 3, the hooks 602 and 603 are in their first position, advanced. The rear end of the connecting member 200 is pressed against the base 100. The hooks 602 and 603 are then coupled to the shafts 203 and 204, so that the rear part of the connecting member is fixed to the base 100. Thus, the rear end of the connecting member 200 is fixed to the rear base 100 to allow the transmission of forces between the heel of the user and the ski. The foot of the user can not then pivot relative to the ski. The attachment 1 is then in the descent position.

Figure 5 is a perspective view of an example of link 601 used in the context of the invention. The link 601 comprises an elongated body, the hooks 602 and 603 extending upwards from the middle portion of this body. To facilitate the passage downward position, the rod 601 comprises a release member 607 in its rear part. The release member 607 has an actuating surface to be manipulated by the user, for example by means of his stick. This actuating surface advantageously has asperities to improve the adhesion of the stick of the user. This actuating surface is projecting vertically relative to the rest of the rod 601, to facilitate the application of axial forces by the user. Solicitation of this actuating surface by the user according to an axial force makes it possible to drive the link 601 from its first (advanced) position to its second (retracted) position. The surface opposite the actuating surface forms a stop surface. This abutment surface is inclined relative to the horizontal.

A recess 606, in the form of an orifice, is formed in the rear part of the link 601, close to the release member 607. A return member 650, such as a coil spring, biases the link 601 to its first position, corresponding to the advanced descent position of the hooks 602 and 603. The return to the first position automatically ensures the attachment of the connecting member 200 to the base 100 when the user lowers his foot and that the rod 601 is placed beforehand in its first position. Such a spring can for example be compressed between a tongue 609 formed at the front end of the rod 601 and a wall 105 of the base 100 placed at the rear of the tongue 609. The return spring can be housed hermetically to the inside of the base to limit its deterioration.

The hook mechanism 600 also comprises a retaining member 640 that is illustrated more precisely in FIGS. 4 and 6. The retaining member 640 is made in the form of a lever pivotally mounted relative to the base 100. retainer has guide rings 647 in its front portion. These guide rings 647 are pivotally mounted about an axis 646. The axis 646 extends transversely and is fixed to a base 630 of a rear base 100. The lever 640 is pivotally mounted between first and second positions of rotation relative to the base 630. The first position of the lever 640 is a low position and the second position is a high position. A protrusion 641 extends upward in the middle portion of the lever 640. The lever 640 further has surfaces actuating surfaces 642 allow the user to exert a force to pivot the lever 640 from its second position to its first position. Each actuating surface advantageously has a portion 648 inclined relative to the vertical, to facilitate its handling by the user, for example by means of his stick. The actuating surfaces advantageously have asperities to improve the adhesion of the stick of the user.

The hook mechanism 600 further has a return member of the lever 640 to its second position. In the example illustrated in FIG. 4, this return member is made in the form of a torsion spring 645 surrounding the shaft 646. The spring 645 has an arm 643 bearing against the underside of the lever 640 and a arm 644 resting against the ski or a wall of the base 630. The torsion spring 645 thus makes it possible to hold the lever 640 stably in its second position, in the absence of manipulation of the actuating surface 642 by the user.

The lever 640 makes it possible to stably maintain the link 601 in its first position, the retracted position. As seen above, the maintenance of the rod 601 in second position, that is to say in the advanced position is provided by the return spring. However, in case of failure thereof, it is the lever 640 that would maintain stably rod in the forward position. Figures 7 and 8 illustrate the link 601 in its second position and the lever 640 in its second position. The projection 641 of the lever 640 is then housed in the orifice 606 of the link 601. The lever 640 thus holds the link 601 in its second position. The mounting position of the fastener 1 is thus guaranteed in a stable manner, avoiding an inadvertent passage in the down position when the user simply plates the connecting member 200 against the base 100.

When the user wishes to tilt the attachment 1 in the lowering position, he prior plate the link member 200 against the base 100. The user then exerts pressure on the actuating surface 642 to rotate the lever 640 to his first position. The projection 641 then leaves the orifice 606. The sliding of the link 601 relative to the base 100 is then released. The return member of the link 601 then drives it to its first position. FIG. 9 represents the beginning of the passage in the descent position when a user has exerted pressure on the actuating surface 642.

When the link 601 reaches its first position, the hooks 602 and 603 are coupled to the shafts 203 and 204. The spring 645 recalls the lever 640 to its second position. Figures 10 and 11 illustrate the link 601 in its first position and the lever 640 in its second position. The projection 641 then comes to be placed behind the abutment surface of the release member 607. The projection 641 thus forms a retractable abutment holding the link 601 in its first position in the absence of biasing the release member 607 by the user. The projection 641 then ensures a stable holding of the rod 601 in its first down position, even in the presence of vibrations during the skiing. Thus, by simply pressing on the actuating surface 642 of the lever 640, it is possible to go from the mounted position to the downward position.

When an axial force is applied to the actuating surface of the release member 607, the abutment surface interferes with the projection 641 to pivot the lever 640 to its first position. When the user continues sliding the link 601 to its second position, the projection 641 is again housed in the orifice 606 under the effect of the return spring 645 to maintain the link 601 in position. Thus, by a simple axial thrust on the release member 607, it is possible to move from the down position to the mounted position.

The switching between the up and down positions can thus be achieved simply by means of a mechanism 600 having a structure that is both simple and lightweight.

The heel 700 is advantageously disposed substantially perpendicular to the shafts 203 and 204. Thus, in the down position, the hooks 602, 603 are also disposed substantially at the level of the heel, that is to say, before the rear end of the heel. This configuration ensures a better transmission of the exerted forces of the heel on the ski because the connection between these elements is more direct. Possible leverage is removed, a source of stress on the ski.

In the example shown, the shaft 203 and the shaft 204 are offset axially, and the hooks 602 are offset axially forwardly relative to the hooks 603. Thus, the transmission of the heel forces to the base 100 is improved. Furthermore, the axial forces exerted by the heel are distributed over the length of the base 100.

In the example shown, the attachment 1 comprises hooks 602 and 603 on either side of the axis of the ski or the median plane of the base 100. Thus, the attachment 1 has a better torsional rigidity around the axis of the ski in the descent position.

The hooks 602 and 603 are advantageously housed in the openings 624 and 625 so as not to protrude with respect to the upper face of the connecting member 200. Thus, the hooks 602 and 603 do not interfere with the sole a shoe maintained in the binding 1 in the down position.

Figures 12 and 13 are side sectional views of a hook variant respectively at the beginning and at the end of its phase of coupling with a shaft. The hook 602 has a lower guide face 622 for guiding the shaft 203 to an axial abutment face 623. The free end 621 of the contact face is rounded to facilitate the start of the coupling illustrated in FIG. FIG. 12. Furthermore, the lower guide face 622 has an inclination around the Y axis. The lower guide face 622 is thus inclined with respect to the plane (X, Y) in which the sliding axis of the link 601 and hook 602. Thus, during the stroke of the hook 602, the possible clearance between the hook 602 and the shaft 203 is gradually caught and the shaft 203 is gradually pulled down to reach the position where it is in contact with the abutment face 623. This traction of the shaft 203 inducing an elastic deformation of the attachment 1, is maintained permanently a vertical contact force between the hook 602 and the shaft 203, which eliminates the play during the use of the binding 1 downhill and thus guarantee a high level of skiing accuracy.

Furthermore, the hook 602 advantageously has an upper guide face 626 for guiding the shaft 203 to its coupling position, when the link 601 is in its first position and the user has not yet plated. the connecting member 200 against the base 100. The upper guide face 626 is thus inclined around the axis Y, so that when the shaft 203 interferes with this face 626, the hook 602 and slightly pushed back to its second position until the shaft 203 reaches the guide face 622. The recalls of the link 601 to its first position then ensures the coupling between the shaft 203 and the hook 602.

The hooks 603 may of course have a shape similar to that of the hooks 602, in order to be able to couple similarly with the shaft 204.

An upstop 101 of the base 100 advantageously forms a hoop surrounding the release member 607 in the position illustrated in the various figures. The hoop of the mounting stop 101 makes it possible on the one hand to avoid a passage in the mounted position as a result of an accidental pressing on the release member 607. The hoop also allows the end of the hinge to be guided. a stick towards the release member 607 to proceed to the climbing position. The release member 607 is advantageously inclined relative to the plane (X, Y), with an inclination around the Y axis, to allow the user to apply an axial force allowing the passage to the climbing position.

The upstop 101 is used when the attachment 1 is in the up position, to provide a raised support relative to the base 100 for the heel of the user. The mounting stop is pivotally mounted about a Y direction axis, via arms 103. The arms 103 are connected by a stop portion 102, intended to form the support for the rear part of the body. 200. At each arm 103, the base has a first boss 104, a first recess 105, a second boss 106 and a second recess 107. During the pivoting stroke of the rise stop 101, the arms 103 are initially deformed elastically during their passage on the boss 104. When the arms 103 reach the recess 105, the stopper 101 is held stably between the bosses 104 and 106 in a first support position substantially perpendicular to the plane (X, Y). When the pivoting stroke of the upstop 101 is continued, the arms are elastically deformed as they pass over the boss 106. When the arms 103 reach the recess 107, the stop 101 is stably held in a rotated position towards the front of about 135 ° relative to the plane (X, Y) to define a second support position.

FIG. 15 represents a view in partial axial section of a ski equipped with the complete binding according to the first embodiment, in a downhill position. At the level heel 700, the partial cut is median. At the junction member and the hook mechanism 600, for reasons of comprehension, the partial section follows the line AA of FIG. 1. This thus makes it possible to see the gripping member 602 and 603 and the return member 650.

This figure illustrates an object of the invention that is the double axial compensation, the latter to obtain more flexibility of the equipped ski. The dimensioning of the elastic means of each compensation can be optimized in order to reduce the stresses exerted on it. This configuration also allows a finer adjustment due to the lower stiffness of the elastic means.

The first axial compensation is performed at the heel 700, via the elastic means 750, as explained above. This compensation is known per se in ski mount bindings.

The second axial compensation is obtained by the return member 650. Its operation is as follows. When the ski flexes, it forms an arc while the junction member 200, relatively rigid, forms the rope. This results in a relative axial displacement of the rear end of the connecting member relative to the ski. Thus, the hooking means of the connecting member, namely the trees 203 and 204 recede relative to the ski. This movement causes the axial translation of the rod 601 since the shafts 203, 204 are in direct contact with the gripping member, namely the hooks 602, 603 of the rod 601. The rod 601 is guided axially by the rear base 100. The rod 601 is also in contact with the return member 650 via a tongue 609. In contrast, the return member 650 is in contact with a wall 105 of the base 100, fixed relative to the ski 2. As a result, the retraction of the rod 601 causes the compression of the return member 650, thus achieving the second axial compensation.

The two axial compensations are parallel and their effects are cumulative, all the more so when the connecting member is flexible around a transverse axis. Thus, the flexing of the ski simultaneously drives the compression of the elastic means 750 and the return member 650. This double compensation makes it possible to obtain more flexibility in the bending of the ski without putting the ski too much on the level of the hooking means of the ski. fixation. The sizing of the compensations could be optimized because the compensation is distributed via two mechanisms.

Advantageously, the stiffness of the elastic means 750 is different from that of the return member 650. This allows to favor an axial compensation with respect to the other, depending on the need and behavior of the desired ski. One can thus wish to have a greater displacement of one element relative to another, during the flexion of the ski.

Likewise, the compression stroke of the elastic means 750 may be different from that of the return member 650. This makes it possible to obtain an evolution of the non-linear compensation. It will be noted that the articulation of the front stop also contributes to the flexibility of the equipped ski.

Figures 16 to 17 illustrate a second embodiment dedicated more particularly to the practice of alpine skiing.

In these figures, the elements that may be common to both embodiments have the same reference. The specific elements of the second embodiment carry an index "b".

In this design, the front stop 300b is fixed relative to its front base 400b. The heel 700 is connected to the front base 400b by a connecting member 200b. The joining member 200b comprises a plate 205 on which the heel piece 700 is fixed and a connecting blade 206b flexibly flexible about an axis transverse to the ski, connecting the plate 205 to the front base 400b of the front stop. 300b. Thus, in the absence of hook mechanism 600b, the plate 205 is movable relative to the ski.

The hook mechanism 600b is similar to the previous embodiment except that the retainer 640 and the release member 607 have been removed because they are not useful for alpine skiing. Furthermore, the hook mechanism 600b also differs at the location of the return member 650. Indeed, it is more convenient and more accessible, particularly to adjust the compensation effort, to place the body of 650 reminder on the back of the heel 700. This arrangement also reduces the thickness of the junction member 200 and therefore the distance between the sole of the shoe and the ski.

The hook mechanism 600b also incorporates a setting means 660 of the compensation force exerted by the return member 650, that is to say, a spring in this case. The wall 609 of the link 601 is located, this time, behind the hooks 603 and bears on the spring 650. This spring 650 then presses a set screw 660 forming the adjusting means. The adjusting screw 660 is engaged with an indentation 670 integral with the rear base 100 or directly fixed on the ski 2. The guide screw 660 is supported by a housing of the rear base 100 or directly fixed on the ski 2 , so as to allow only the rotation and the axial displacement of the adjusting screw 660 relative to the housing.

Thus, by screwing, it causes the axial displacement of the adjusting screw 660 along the indentation 670 and therefore, consequently, the compression of the spring 650. Indeed, the spring is in contact on one side with the screw 660 and, on the other side, with the wall 609 of the link 601. On the one hand, the rod 601 is guided axially by the rear base 100. On the other hand, the rod 601 is axially immobilized thanks to the hooks 602, 603 in contact with the shafts 203, 204 connected to the fixed front base 400b. Also, the axial displacement of the adjusting screw 660 causes the compression of the spring 650. The stiffness of the return member 650 and that of the elastic means 750 can thus be adjusted advantageously by means of adjustment means 660, 710.

The operation of the double axial compensation is similar to the previous embodiment except that the cumulative effects are more pronounced due to the flexibility of the connecting blade 206b.

Figures 16 and 17 can explain visually the operation of the axial compensation. FIG. 16 represents a ski equipped without bending whereas FIG. 17 represents a bending of the ski and the consequences on the axial compensations. During the flexing of the ski, the return member 650 and the elastic means 750 are compressed. The length of the spring 650 changes from a rest value of L6R to a smaller flex value L6F. The length of the spring 750 changes from a rest value of L7R to a smaller flex value L7F.

The joining member (200, 200b) has a front end secured to the ski (2) in the sense that the connection between the front end of the connecting member and the front base (400, 400b) fixed on the ski (2) limits certain degrees of freedom but is not necessarily embedded. The front end may be pivotally mounted relative to the front base (400), as illustrated by the first embodiment (Figs 1 to 15). It can be rigidly mounted (recessed) with respect to the front base (400b), as illustrated by the second embodiment (Figures 16 and 17). The connection between the front end and the front base can also be of the ball joint type or allow only a translation along an axis.

The return member 650 and the elastic means 750 may be a spring, a rubber or any other element allowing a springback.

The invention is not limited to these two embodiments and covers other fasteners having at least two distinct axial compensations.

The front stop may be a pivoting abutment around an axis transverse to the ski whose front base is fixed directly to the ski. The joining member 205b is then similar to that of the second embodiment. It is connected to the front base.

The gripping member is not necessarily located at the heel 700, it may be, for example, at the rear thereof, which facilitates the design and allows a manual action on it.

Different gripping members can be envisaged. It can be a single hook, for example at the back of the heel. The gripping member may comprise several hooks as in the examples illustrated above.

The gripping member may also be a simple transversely displaceable lock. For example, the hooking means is simply constituted by holes in the plate where is fixed the heel (the back of the junction member). The axis of these holes is transverse to the ski. The gripping member is then composed of several shafts able to penetrate into these holes in order to make the plate integral with the gripping member. The axis of these trees is also transverse to the ski. These trees form locks. In this case, once locked, there is no possible relative movement between the plate and the gripping member, unlike the embodiments described above. The gripping member is also secured to the rod which is guided axially by the rear base. The gripping member can therefore move longitudinally relative to the rear base and thus also move the plate supporting the heel. In other words, this construction allows a longitudinal displacement of the heel. The locks may be non-removable or retractable by being mounted, for example, on an elastic means.

The gripping member may be an elastic clip.

Other axial compensation systems can also be envisaged, the systems described being only an illustration of what can be applied.

Claims

1. Attaching (1) a shoe (3) to a ski (2) comprising:

a front stop (300, 300b);

- a junction member (200, 200b) having a front end secured to the ski (2) and a rear end, the connecting member (200, 200b) being provided with a hooking means (203, 204);

a rear base (100) intended to be fixed to the ski (2),

a hooking mechanism (600, 600b), associated with the rear base (100), comprising:

- A gripping member (601, 602, 603) movable relative to the rear base (100) and can be placed in a first position for which it cooperates with the hook means (203, 204) of the organ junction (200, 200b) so as to limit a vertical displacement of the rear end of the junction member (200, 200b);

a first return member (650) exerting a force on the gripping member (601) so as to move it towards the front stop (300, 300b); characterized in that it comprises

- A heel (700) connected to the rear portion (205) of the connecting member (200, 200b), the longitudinal position of the heel (700) relative to the junction member being adjustable.

2. Fastening (1) shoe on a ski according to claim 1, characterized in that a mechanism for the longitudinal adjustment of the heel comprises elastic means (750) housed between a body (701) of the heel (700) supporting a shoe-holding mechanism and a fastener (710) integral longitudinally with the junction member (200, 200b), the elastic means (750) exerting on the body (701) of the heel piece (700) a retraction force, in the direction of the front stop, along a substantially longitudinal axis to the junction member (200, 200b).

3. Attachment (1) shoe on a ski according to any one of the preceding claims, characterized in that the recoil force is adjustable by a first adjustment means (710).

4. Fastening (1) shoe on a ski according to any one of the preceding claims, characterized in that the first return member (650) exerts on the hook means (203, 204) of the connecting member (200, 200b) a compensating force, in the direction of the front stop, along a substantially longitudinal axis to the ski (2).

5. Attachment (1) shoe on a ski according to the preceding claim, characterized in that the compensation force is adjustable by a second adjusting means (660).

6. Attachment (1) shoe on a ski according to any one of the preceding claims, characterized in that the force on the gripping member (601) moves the first return member (650) to its first position.

7. Attachment (1) shoe on a ski according to any one of the preceding claims, characterized in that the front stop (300) is pivotally mounted about an axis transverse to the ski.

8. Attachment (1) shoe on a ski according to any one of the preceding claims, characterized in that the front stop (300b) is fixed relative to a front base (400b) fixed on the ski (3).

9. Fastening (1) shoe on a ski according to any one of the preceding claims, characterized in that the connecting member (200, 200b) is flexible about an axis transverse to the ski.

10. Fastening (1) shoe on a ski according to any one of the preceding claims, characterized in that the gripping member (602, 603) is located at the heel (700) or between the heel (700). ) and the front stop (300, 300b).

11. Attachment (1) shoe on a ski according to any one of the preceding claims, characterized in that the gripping member comprises at least two hooks (602 or 603) disposed on either side of a plane median of the rear base (100), the hooks being adapted to cooperate with at least one arrangement (203, 204) of the junction member (200, 200b), the arrangement forming the hooking means.

12. Fastening (1) shoe on a ski according to any one of the preceding claims, characterized in that the gripping member (601, 602, 603) is slidably mounted longitudinally relative to the rear base (100). between first and second positions, the gripping member fixing the connecting member (200) to the rear base (100) in the first locking position and releasing the connecting member relative to the rear base in the second unlocking position.

13. Fastening (1) shoe on a ski according to the preceding claim, characterized in that the hook mechanism (600, 600b) comprises:

- A retaining member (640) integral with the rear base (100), the retaining member being movably mounted between first and second positions relative to the rear base, the retaining member having a surface of actuation (642) to be manipulated by the user from its first to its second position, the first position of the retainer releasing the passage of the gripping member from its second position to its first position, the second position of the retaining member holding the gripping member in its second position;

- A release member (607) having an actuating surface to be manipulated by the user, the biasing of the actuating surface axially driving the gripping member to the second position.

14. Fastening (1) shoe on a ski according to the preceding claim, comprising a second biasing member (645) urging the retaining member (640) to its second position.

15. Fastening (1) shoe on a ski according to claim 13 or 14, comprising a retractable stop holding the gripping member in its first position in the absence of biasing of the release member, and releasing the sliding of the gripping member from its first position to its second position when an axial force is applied to the actuating surface of the release member (607).