FR2876041A1 - Boot fastening device for e.g. alpine ski type snowboard, has pivot maintaining plate on snowboard by cooperation of system of two boards of central locking disc with two fastening projections of horizontal fastening branch of base - Google Patents

Abstract

The device has a pivoting central locking disc (8) with a system of two boards to fix a pivot (50) on a base (9). The pivot maintains a plate on a snowboard by cooperation of the boards of the central locking disc with two fastening projections of a horizontal fastening branch of the base. A pivot body (5) has a lower housing (17) in which the base is engaged. An independent claim is also included for a snowboard comprising a boot fastening device.

Description

2876041 1

  The present invention relates to a device for retaining a boot on a board for gliding on snow intended more particularly for the practice of surfing, also called snowboarding. . It relates more particularly to its surf attachment means and its adjustment means in angular position.

  Snow sliding boards are of different types, namely, alpine skis, cross-country skis, cross-country skis, skis for skis, skis for freestyle skiing.

  But there are also snow boards called surf whose width is wide enough to hold the two shoes of the skier, in an angular position, that is to say at an angle to the general plane of symmetry of the board, the front end of shoes facing to the right for a right-handed, or to the left for a southpaw. Thus, one of the feet is arranged in front of the other foot, each of the shoes being also in an angular position different from the other shoe. It should also be noted that each user wishes to be able to adjust the angular position of his shoes, either permanently or in such a way that this adjustment can be modified.

  Thus, the shoes of the user are fixed to the surf, for example, on a plate which is either non-adjustable to the ski in the selected angular position, or mounted on a pivot comprising fastening means which adjust the angular position, by 2876041 2 rotation about a vertical axis, and to immobilize said platen by locking.

  All traditional devices are not very practical, and often unreliable, and all have the disadvantage that the game that inevitably exists between the plate and the board, this game being simply manufacturing tolerances, and the game resulting from the product wear. The movement of the deck of the game is particularly unpleasant for an informed user who seeks to have a perfect conduct of its trajectory.

  The device disclosed by the French patent application No. 2,834,909 filed by the applicant is also known, according to which there is provided a base fixed to the gliding board, to which is retained in a removable manner, the plate which can moreover be oriented in a selected orientation, the catch of the possible game is achieved by a central screw. However, this device requires tools to operate the central screw.

  The device described in the European patent application EP 1 106 215, according to which the base is removable and can be positioned on a base fixed to the gliding board in a determined orientation, is also known. But this device that does not require special tools does not make up for possible games.

  The present invention proposes a new device that is particularly simple, easy to implement, and reliable, according to which the angular adjustment of the plate is done manually, without particular tools, and whose plate can be detached from the base in the same conditions, that is, manually without tools. The device 2876041 3 the invention also allows the catching of possible games, between the plate and the board.

  Thus, according to the invention, the device for retaining a boot on a gliding board of the type comprises - a plate, provided with retaining means for the boot, - a central retaining assembly or pivot of vertical axis comprising a pivot body located in the central zone of the plate, and intended to fix the plate on the gliding board, by means of a manual locking system which ensures the retention of the pivot on a base fixed to the gliding board, and is characterized in that the retention of the pivot on the base is achieved through the cooperation of a ramp system of a pivoting central locking disk, with at least one attachment projection integral with the base.

  According to a complementary feature, the pivot body comprises on its underside a lower housing in which is engaged the base, said housing having complementary shapes to those of the base to prevent the pivot body from moving relative to the housing. base, both in translation and in rotation.

  According to another complementary feature, the plate comprises a central hole intended to receive and cooperate with the pivot body, said central hole comprising, moreover, a peripheral flange whose upwardly facing transverse face comprises a circular toothing consisting of a succession of projections and radial recesses, intended to cooperate with a circular toothing consisting of a succession of projections and radial recesses formed on the transverse lower face of a peripheral flange formed on said pivot body.

  Note that the central locking disk is pivotally mounted on the pivot, about the vertical axis, while the central locking disk is held pivotally on the pivot, and the retention of the central locking disk on the pivot is obtained by a holding hood.

  According to the proposed embodiment, the central locking disc comprises a locking and unlocking stirrup, movable between an unlocking position and a locking position, said stirrup is pivotably mounted on the central locking disc, about an axis. transversal horizontal.

  In addition, the pivot comprises a retaining disk sandwiched between the central locking and unlocking disk and the pivot body.

  According to the embodiment given by way of example, the free branches of the stirrup have a cam-shaped section, to constitute a clamping cam, so that in the locking position the cam provokes by its mutual support between the retaining disk and the pivoting bridge of the central locking disk an effective clamping.

  Furthermore, the base comprises two hooking projections extending horizontally outwardly relative to the vertical axis and intended to cooperate with the ramp system, while the central locking disk comprises a central hole intended to receive and cooperate with the base which comprises a peripheral rim 2876041 5 comprising on its horizontal face (8d) facing upwards, a ramp system namely two diametrically symmetrical bearing ramps. Note also that the two bearing ramps comprise a circular toothing consisting of a succession of projections and radial recesses.

  The two support ramps form clamping ramps by their cooperation with the attachment projections of the base, the peripheral rim being constituted by two peripheral rim portions, namely a first portion and a second diametrically symmetrical portion of the first portion, which are such that the thickness of each of these portions varies.

  In addition, the pivot comprises a holding cap holding together the elements of said pivot, namely, the pivot body the holding disk and the central locking and unlocking disc.

  It will be understood that, thanks to the means of the invention, the professional mounting fixtures, can prepare surfs with the base of the invention and can fix different type of platinum, and choosing the desired platinum.

  The invention also relates to the surf equipped with bases.

  Other features and advantages of the invention will emerge from the description which follows with reference to the accompanying drawings which are given by way of non-limiting examples.

  Figure 1 is a top view of a gliding board such as a surf, equipped with its two user's shoes retaining devices.

  Figure 2 is a side view of the retainer with the shoe.

  Figure 3 is a perspective view of one of the retaining devices of the shoe, but without the latter.

  Figure 4 is an exploded perspective view of the fixing means of the plate to the surf, representing all the elements constituting them.

  Figures 5 and 5a show the central locking disk, Figure 5 being a sectional view along C-C of Figure 5a which is a top view.

  Figure 6 is a perspective view before mounting the plate on the surf, the pivot being assembled, close for its mounting that is to say its attachment to the base attached to the gliding board.

  Figure 7 illustrates in a perspective view the plate in the mounted position and locked.

  FIG. 8 is a top view of the pivot in place on the plate, without the holding cap, but with its locking and unlocking caliper in the unlocking position, the ramps of the central locking disk 2876041 being in engagement with the protruding projections, by its thin areas.

  Figure 8a is a sectional view along line A-A of Figure 8, in which it can be seen that the cams of the free limbs of the yoke are in the inactive position of non-tightening.

  FIG. 9 is a plan view of the pivot in place on the plate, without the holding cap, but with its locking and unlocking bar in the locked position, the ramps of the central locking disc being in engagement with the projections hanging, by its thick areas.

  Figure 9a is a sectional view along B-B of Figure 9. Figure 9b is a partial sectional view along D-D of Figure 9a.

  Figure 10 is a bottom view of the pivot body.

  Figure 11 is a top view of the base attached to the gliding board.

  Figure 12 is a top view of an alternative embodiment illustrating an implementation of the base according to the standard three screws.

  Figure 13 is a perspective view showing a surf with the pivot but without the corresponding plate.

  A gliding board (1) intended for surfing, of a vertical plane of general symmetry (P), comprises two retaining devices 2876041 8 (2a, 2b) also called fasteners for retaining on said surf the two shoes (30). of the user. The two retaining devices are fixed on the upper surface (3) of the surf (1) so that their respective general plane of symmetry (T) is at an angle to the vertical plane of general symmetry (P) of the surf ( 1), as illustrated in FIGS. 1, 2 and 3, but as appears more particularly in FIG. 1.

  Thus, the general plane of symmetry (T) of the front attachment (2a) forms with the vertical plane of general symmetry (P) of the surf, an acute angle (A) open towards the front (AV), while the plane general symmetry (T) of the rear binding (2b) also forms, with the plane (P) an acute angle (B) open towards the front (AV).

  The surf illustrated in Figure 1 shows a mounting arrangement for a right-handed person, that is to say that the angles (A) and (B) are open forwards (AV) and to the right (DR). For a southpaw, the angles (A) and (B) would be open forwards and to the left (GA). It will also be noted that the angle (A) of the front binding (2a) is different from the angle (B) of the rear binding (2b).

  Hereinafter will be described one of the shoe retaining devices which will be designated under the general reference (2), which comprises means for being retained and attached to the surf in a selected angular position.

  For this purpose, the retaining device (2) is constituted by a plate (4), or support plate on which is fixed the shoe (30) of the user by any appropriate means, said plate being retained on the surf by its central part by means of a central retaining piece or pivot 2876041 9 (5) and which is in the form of a disc of vertical axis (X, X '), allowing the user to adjust the angular position of its plate, by rotation about the vertical axis (X, X '), then to ensure the locking in the chosen position.

  According to the embodiment described, the plate (4) is in the form of an elongate plate extending horizontally, on which the shoe is retained for example by a front retaining member (6) retaining the front of the boot, and a rear retainer (7) retaining said boot at the kick.

  The front retaining member (6) and the rear retaining member (7) are, according to the embodiment illustrated by way of example, constituted by a semi-rigid strap made, for example, of plastic material, advantageously comprising adjustment means for adapting them to the volume dimensions of said shoe. Of course, any other retaining means of the boot may be provided, other than semi-rigid straps, such as for example according to the means described in the French patent published under No. 2,742,997, or in the published international patent application under number WO 97/22390.

  According to a feature of the invention, the pivot (50) is removably attached to a base (9), fixed to the surf (1), for example, by four fixing screws (10a, 10b, 10c, 10d).

  Furthermore, the plate (4) comprises a central hole (4a) for receiving and cooperating with the pivot (50). This central hole further comprises a peripheral flange (4b) comprising on its transverse face 2876041 10 facing upwards, a circular toothing (4c) consisting of a succession of radial projections and recesses whose function will be explained.

  The base (9), made for example of plastic or any other material, such as for example aluminum, or other, in the general shape of a cross, each of whose angles constitutes an angular projection (14a, 14b, 14c, 14d) extending diagonally, while each of the diagonal projections comprises a through hole for receiving the surf attachment screws (10a, 10b, 10c, 10d). It will be noted that according to the embodiment described, the diametrically opposite angular projections of one of the diagonals have a shape different from those of the other diagonal, which allows the operator to set up a position in his orientation of the pivot. corresponding.

  The base (9) comprises a horizontal hooking branch (16) constituted by two hooking projections (16a, 16'a) extending horizontally outwards with respect to the vertical axis (X, X ' ).

  The pivot (50) consists mainly of a pivot body (5) of generally circular shape and comprises on its lower face, a lower recess housing (17) in which is engaged the base (9). Also, this housing is of shapes and dimensions corresponding to those of the base (9), at least as regards its periphery, as it appears more particularly in Figures 10 and 11. Thus, the body of the pivot (5 ) in the mounted position cooperates with the base (9) thanks to its lower housing (17) in which said base (9) fits, the pivot body (5) being thus locked in rotation with respect to the base ( 9).

  It should be noted that the pivot body (5) comprises a circular peripheral pivoting wall (5a) which, by cooperation with the corresponding circular wall (4d) of the central hole (4a) of the plate (4), pivoting this last. Said pivot body further comprises a central hole (5d) intended to ensure the passage and the relative movement of the hooking branch with its hooking projections (16a, 16'a), and assembly tabs ( 21c, 21'c).

  The vertical retention of the plate (4) is provided by the pivot with a peripheral rim (5b) projecting outwardly, intended to cooperate with the peripheral flange (4b) of the central hole (4) of said plate.

  The locking of the pivot body (5) on the base (9) thus allows the upward retention of the plate by cooperation of the peripheral flange (5b) with the peripheral flange (4b) of the central hole (4), but also locking in the angular position chosen during assembly. For this purpose, the transverse underside of the peripheral flange (5b) of the pivot comprises a circular toothing (5c) consisting of a succession of radial projections and recesses intended to cooperate with the corresponding circular toothing (4c) made on the upper face. peripheral rim (4b) of the central hole (4a) of the plate.

  The cooperation of the toothing (5c) of the pivot (5) with the toothing (4c) 25 of the plate (4) can condemn the rotation of the base when the pivot is fixed on the base.

  The pivot body (5) is part of a central retaining assembly or pivot (50) which furthermore comprises a retaining disk (20), a central locking disc (8), a retaining cover ( 21), and a locking and unlocking bracket (22). Of course, the pivot body (5) and the retaining disk (20) could form one and the same piece.

  The holding cap (21) has the general shape of a disk whose wall (21a) comprises a cylindrical housing (21b) advantageously open downwards, in which are engaged the ends (22a, 22'a) of the branches free (22b, 22'b) of the locking and unlocking caliper (22). Thus, said yoke (22) which in the form of an open loop, is pivotally mounted on the holding cap (21) around the transverse and horizontal axis (Q, Q '), by rotation of the two free branches (21a, 21'a) in the housing (21b) of said cover. It will be noted that the pivoting of the stirrup (22) around the transverse and horizontal axis (Q, Q ') allows it to take two positions, a locking position in which the stirrup is arranged in such a way that that its general plane is horizontal, as illustrated in Figures 3, 7, 9, 9a, and an unlocking position in which the stirrup and arranged so that its general plane is vertical as shown in Figures 6 , 8, 8a. Note also that the free branches (22b, 22'b) of the caliper do not have a circular section, but a cam-shaped section, to form a clamping cam, so that in the locking position as 3, 7, 9, 9a, the cam causes by its mutual support between the retaining disk (20) and the pivoting bridge (8f, 8'f) of the central locking disk (8) a clamping effective and a stable locking position.

  The central locking disk (8) comprises an outer peripheral wall forming two diametrical housings (8a, 8'a), formed by the bridges (8f, 8'f), into which the free branches (22b, 22'b) are engaged. ) of the locking and unlocking bracket (22). Thus, said stirrup (22) is pivotally mounted on the retaining disk, around the transverse axis (Q, Q '), by rotation of the two free branches (22a, 22b) in the diametrical recesses (8a, 8'a). ).

  The central locking disk (8) comprises a central hole (8b) intended to receive and cooperate with the base (9) as will be described later in the description. This central hole (8b) further comprises a peripheral rim (8c) comprising on its horizontal face (8d) facing upwards, a ramp system namely two diametrically symmetrical bearing ramps (8f, 8'f), each advantageously comprising a circular toothing (8g) consisting of a succession of radial projections and recesses whose function will be explained. It has therefore been noted from the foregoing that the ramp system is located on the upper face of the locking disk, that is to say facing upwards.

  The two bearing ramps (8f, 8'f) form clamping ramps by their cooperation with the attachment projections (16a, 16'a) of the base (9). For this purpose, the peripheral rim (8c) consists in fact of two portions of peripheral rim, is such that the thickness of each of these portions varies. Thus the disk comprises two symmetrical peripheral rim portions, namely a first portion (A-B) and a second portion (A'-B ') diametrically symmetrical with the first portion, the thickness of the rim at the points A and A 'being greater than the thickness of the flange at points B and B', the thickness gradually decreasing points A, A 'to the points B, B'.

  Note also that the central hole (8b) of the central locking disk (8) comprises two radial clearances (8h, 8'h) made 2876041 14 in the peripheral rim (8c) allowing as we shall see later the passage of the horizontal locking pin (16) and more particularly of its two attachment projections (16a, 16'a).

  It will be added that the two radial clearances (8f, 8'f) made in the peripheral flange (8c) also allow the passage of the two assembly tabs (21c, 21'c) of the locking cap (21). Each of these two tabs extends downwards and comprise a clipping projection (21d, 21'd) intended to cooperate with the underside of the pivot body to ensure the connection and retention of the elements of the pivot, namely the pivot body (5), the retaining disk (20) and the central locking disk (8).

  The retaining disk (20) is sandwiched between the pivot body (5) and the central locking disk (8). The disk is a sufficiently rigid piece to accommodate the forces exerted on the pivot body. Thus, the pivot body (5), the retaining disk (20), the central locking disk (8) the holding cap (21) with the pivoting locking yoke (22) constitutes the central retaining assembly (50) for holding the plate (4) on the gliding board (1) by its cooperation with the base (9), and more particularly by the cooperation of the ramps (8d, 8'd) of the central locking disk (8) with the hooking protrusions (16a, 16'a) of the horizontal hooking arm (16) of the base (9).

  Note that the pivoting of the locking and unlocking assembly (15) constituted by the central locking disk (8) and the holding cap (21) with its stirrup (22) is limited by a system of stops formed by the cooperation of two protrusions (24a, 24b) extending downward into the recess housing of the base (17) at the periphery of the central hole of the pivot body (15), with the end of the assembly legs (21c, 21'c), as shown in FIG.

  It will be added that the retaining disk (20) comprises a stop (20a) intended to limit the pivoting of the central locking disk (8). This abutment (20a) is advantageously constituted by a cutout arranged on the upper surface (20b) of the retaining disc (20), and is a stop for the stirrup (22) when the latter is in the folded down position.

  It should be pointed out that the pivot body (5) with its retaining disk (20) form an assembly locked in rotation relative to the base (9), whereas the central locking disk (8), the holding cap (21) and the stirrup (22) form a manual locking assembly movable in rotation relative to the base (9).

  The base (9) is fixed on the upper surface of the gliding board (1) as shown in Figure 6, and the mounting of the plate (4) is done according to the following process.

  The plate (4) is placed on the surface of the board, so that the base (9) is arranged in the center of the central hole (4a) of said base.

  Then the user approaches the pivot (50), that is to say the central retaining assembly (50), to come on the one hand engage the base (9) in cooperation with the recess housing ( 17), and secondly engage the horizontal hooking arm (16) and more particularly its lateral attachment projections (16a, 16b) in the radial recesses (8a, 8'a) of the central locking disk ( 8).

  Previously the user will have taken care to place the stirrup (22), vertically so that its general plane is vertical, as shown in Figure 6. The entire pivot (50) must be put in place until the pivot body (5) is in place to cooperate with the corresponding central hole (4a) of the plate (4), the plate being of course oriented in the desired angular position. The engagement of the pivot (50) on the base (9) must be finalized by rotation of the central locking disc, until the attachment projections (16a, 16b) are arranged above the ramps (8d). , 8'd) of the central locking disk (8).

  The user will then have to lock the assembly and ensure proper retention of the plate, rotate the central locking disk (8) with its holding cap (21), until the tightening without play is achieved by cooperation of the hooking projections with the corresponding ramps. The user will then only have to pivot again the caliper down to place it in its locking position in which its general plane is horizontal as shown in Figures 2, 7, 9 and 9a.

  Conversely, from the position of Figure 7 the user can lift the stirrup by rotating it upwardly according to FI, to move it from its locking position to its unlocked position, to release the clamping. It will thus be possible thanks to the stirrup to rotate the central locking disc to release the cooperation of the ramps of the disc with the attachment projections. This release allows the user to release the cooperation of the toothing of the base, the toothing of the body 2876041 pivot 17, and thus change the angular position of the base. Once the angular position chosen, the user can rotate the stirrup to cooperate the ramps of the locking disc and ensure the locking, then fold down the stirrup to place it in the locking position.

  When locking, there is engagement and cooperation of the toothing (5c) of the pivot body (5), with the corresponding toothing (4c) of the plate (4). Of course, before complete clamping, the user, by pivoting the plate around the vertical axis (X, X ') places it in the appropriate angular position. Position, it can change at any time by operating as before.

  Note that the general shape of the periphery of the base (9) and the general shape of the periphery of the corresponding recess housing (17) may have other forms than that illustrated. The essential is to have complementary shapes preventing the pivot body from moving relative to the base, both in translation and in rotation. In the preferred embodiment illustrated the cooperation between the base and the pivot body is by a succession of projecting and recessed profiles.

  It will also be noted that the chosen form of the base (9) has been defined around the mounting standard on the four-screw surf, but it goes without saying that the shape of the base could be defined around the mounting standard to three screws, as shown in Figure 12.

  2876041 18 It will be understood that thanks to the system of ramps the possible games of manufacture or wear, can be caught. And platinum will always be perfectly maintained on the gliding board.

  It has also been understood from the foregoing that the plate (4) is retained on the base (9) which is fixed on the gliding board, thanks to a manual locking system, that the user can maneuver manually at any time and without special tools. So we have a base that is fixed to the gliding board by a manual locking system, extremely simple. It will be added that the device of the invention allows the user or the professional, for example, to rent, to store the board with only the bases that are fixed on which the pivot can be mounted, as shown in FIG. 13. Moreover, the type of platinum intended to equip the board may be chosen at the last moment to be mounted. Of course, the invention is not limited to the embodiments described and shown by way of examples, but it includes also all technical equivalents as well as their combinations.

Claims (16)

  1. Retaining device (2, 2a, 2b) of a shoe on a gliding board (1) comprising: - a plate (4), provided with retaining means (6, 7) for the shoe (30) - a central retaining assembly or pivot (50) of vertical axis (X, X ') having a pivot body (5) located in the central zone of the plate, and for fixing the plate on the gliding board (1), by means of a manual locking system which ensures the retention of the pivot (50) on a base (9) fixed to the gliding board (1), characterized in that the retention of the pivot (50) on the base (9) is achieved through the cooperation of a system of ramps (8e, 8'e) of a pivoting central locking disc (8), with at least one attachment projection (16a, 16'a) secured to the base (9).   2. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to claim 1, characterized in that the pivot body (5) comprises on its underside a lower housing (17). ) in which is engaged the base (9), said housing having complementary shapes to those of the base (9) to prevent the pivot body from moving relative to the base, both in translation as in rotation.   3. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to claim 2, characterized in that the plate (4) comprises a central hole (4a) for receiving and cooperating with the pivot body (5), said central hole further comprising a peripheral flange (4b) whose upwardly facing transverse face comprises a circular toothing (4c) consisting of a succession of projections and projections; radial recesses, intended to cooperate with a circular toothing (5c) consisting of a succession of radial projections and recesses formed on the transverse lower face of a peripheral flange (5b) formed on said pivot body (5).   4. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to claim 3, characterized in that the central locking disc (8) is pivotally mounted on the pivot (50) , around the vertical axis (X, X ').   5. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to claim 4, characterized in that the central locking disc (8) is pivotally retained on the pivot (50). ).   6. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to claim 5, characterized in that the retention of the central locking disk (8) on the pivot (50) is obtained by a holding cap (21).   7. Retaining device (2, 2a, 2b) of a shoe on a gliding board (1) according to any one of the preceding claims, characterized in that the central locking disk (8) comprises a locking stirrup and unlocking (22), movable between an unlocking position and a locking position.   8. Retaining device (2, 2a, 2b) of a shoe on a gliding board (1) according to claim 7, characterized in that the stirrup (22) is mounted pivotally movable on the central disc locking, about a horizontal transverse axis (Q, Q ').   9. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to any one of the preceding claims, characterized in that the pivot (50) comprises a retaining disc (20) sandwiched between the central locking and unlocking disk (8) and the pivot body (5).   10. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to claim 8 or 9, characterized in that the free legs (22b, 22'b) of the caliper have a cam-shaped section for constituting a clamping cam, so that in the locking position the cam causes by its mutual support between the retaining disc (20) and the pivoting bridge (8f, 8'f) locking central disk (8) effective clamping.   11. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to any one of the preceding claims, characterized in that the base (9) comprises two hooking projections ( 16a, 16'a) extending horizontally outwardly with respect to the vertical axis (X, X ') and intended to cooperate with the ramp system (8e, 8'e).   12. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to any one of the preceding claims, characterized in that the central locking disc (8) comprises a central hole ( 8b) intended to receive and cooperate with the base (9) which comprises a peripheral flange (8c) comprising on its horizontal face 2876041 22 (8d) facing upwards, a ramp system namely two support ramps diametrically symmetrical (8e, 8'e), 13. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to claim 12, characterized in that the two bearing ramps (8e, 8'e) comprise a toothing. circular (8g) consisting of a succession of projections and radial recesses.   14. Retaining device (2, 2a, 2b) of a boot on a gliding board (1) according to claim 13, characterized in that the two bearing ramps (8e, 8'e) form ramps of clamping by their cooperation with the hooking projections (16a, 16'a) of the base (9), the peripheral flange (8c) being constituted by two portions of peripheral rim, namely a first portion (A-B) and a second portion (A'-B ') diametrically symmetrical with the first portion, which are such that the thickness of each of these portions varies, so that the thickness of the rim at the points A and A' being greater than the thickness of the flange at points B and B ', the thickness gradually decreasing points A, A' to points B, B '.   15. Retaining device (2, 2a, 2b) of a shoe on a gliding board (1) according to any preceding claim characterized in that the pivot (50) comprises a holding cap (21) retaining together the elements of said pivot, namely, the pivot body (5) the holding disk (21) and the central locking and unlocking disk (8).   2876041 23 16. Surf (1) intended to be equipped with the retaining devices (2, 2a, 2b) of a boot according to any one of the preceding claims, characterized in that it comprises two bases (9).