FR2788443A1 - Releasable attachment for surf board includes pair of jaws separated by cam where spring acts, and additional jaw located in front or behind the lateral jaws - Google Patents

Abstract

Attachment includes a pair of jaws (7,8) which can be laterally separated by pushing a cam (13) on which springs (19) act. An additional jaw (21) is located in front or behind the lateral jaws and can tip about a ball joint against spring action. The fixing receives a part integral with the shoe sole and has a shoe release lever (24).

Description

SNAP-ON FIXING FOR SLIDING BOARD

  The present invention relates to a triggerable binding for a sliding board comprising a part intended to be fixed to a shoe and a part intended to be fixed to a sliding board, in which the part intended to be fixed to the sliding board comprises a pair. jaws which can be spaced apart from one another and an elastic means opposing this separation and in which the jaws and the part intended to be fixed to the shoe are shaped so as to allow the jaws to be separated, when putting on of the fastening and when triggered, by the part intended to be fixed to the shoe and to maintain the

  shoe on the board after putting on.

  Such a fixing is known from patent FR 2 409 064.

  In this binding, the sole of the shoe is provided with a plate retained between the two jaws of the binding, the lateral sides of this plate 20 having a recessed cut to ensure the longitudinal retention of the shoe. Each of

  jaws is mounted at the end of an arm which can pivot about a vertical axis.

  Fasteners of the same type are described in US Pat. Nos. 4,143,886 and EP 0 771 228. These fasteners also include a pair of jaws and are characterized by the presence of rods for the transmission of forces from the spring to the jaws

  articulated around a vertical axis.

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  These bindings have the advantage, on the one hand, of responding well to a stress on the torsional leg due to their position in the middle part of the shoe and, on the other hand, of being able to be used for different lengths without the need for adjustment. In such bindings, it is certainly easy to ensure good lateral pinching of the sole of the shoe or of the metal plate fixed to this sole, by the jaws. It is however not the same as regards the maintenance of the boot along a determined axis on the gliding board. Indeed, even if the shape of the jaws is perfectly adapted to the shape of the shoe plate, the spring which holds the jaws should be excessively strong to prevent any rotational movement around a vertical axis. In addition, the wear of the jaws and the plate of the shoe increases this possibility of rotation, which, even if very limited, is equivalent to a play for the user, play which makes the handling of the gliding board imprecise and creates a feeling of insecurity. A similar play also appears when the skier leans on

the back of the shoe.

  Using the idea of retaining the shoe by a pair of jaws located in the middle region of the sole of the shoe, the present invention aims to overcome the drawbacks of fasteners according to the prior art, that is to say say to make a fixing with side jaws ensuring a perfect hold of the

  shoe in its longitudinal direction.

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  To this end, the binding according to the invention further comprises additional retaining means, elastically retained and triggerable, opposing at least a torsional stress on the part intended to be fixed to the shoe around an axis at less approximately vertical, these additional means preferably being located in front of the jaws,

  relative to the heel of the shoe.

  Thus, even in the presence of an angular play of the shoe in the jaws, the additional support

  of it neutralizes this angular play.

  As noted above, the backlash occurs as well at low loads in

torsion only due to wear.

  Additional means of support could

  also keep the shoe torn off, that is

  ie like the conventional stops.

  The additional holding means preferably consist of a jaw articulated by a ball joint and a slide held in abutment against the lower part of said jaw by said elastic means, so as to maintain

  elastically the jaw in a determined position.

  The ball joint allows pivoting of the jaw in all directions in the space above the attachment. The shoe can therefore be

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  free from the jaw both in torsion and in

fall forward or backward.

  According to a preferred embodiment of the invention, the elastic means retaining the pair of jaws is mounted between the pair of side jaws and the jaw of additional holding means so as to simultaneously maintain the jaw of the

additional holding means.

  The size of such a fastening is therefore not greater than that of the fasteners according to the prior art. The elastic means is covered by the sole of the shoe and extends over a length substantially

  less than the length of the sole.

  The jaws of the pair of jaws are advantageously in the form of a lever of the first kind, the axis of which is parallel to the longitudinal axis of the fastening and they are supported on a dihedral cam sliding horizontally, axially, and

retained by the elastic means.

  The common elastic means mounted between the dihedral cam and the slide on which the jaw of the additional holding means rests, consists, for example, of one or two springs working in compression or of at least one blade

working in buckling.

  The accompanying drawing shows, by way of example, a mode

of the invention.

2788443

  Figure 1 is a first perspective view of the part of the fastener intended to be fixed to the

gliding board.

  Figure 2 is a second perspective view of the

same party.

  Figure 3 is a perspective view from above of the

  part intended to be fixed to the shoe.

  Figure 4 is a side view of a sole of

  shoe with the plate shown in Figure 3.

  Figure 5 is a top view of the part

shown in Figures 1 and 2.

  Figure 6 is a longitudinal axial sectional view

according to VI-VI of Figure 5.

  Figure 7 is a sectional view along VII-VII of the

figure 6.

  The binding shown essentially consists of a part 1 (FIG. 1) intended to be fixed to a gliding board, for example a ski, and of a part 2 (FIG. 3) integrated into a shoe sole and

  intended to be fixed to part 1.

  Part 1 comprises a base 3 having four holes for fixing it to the ski and the central part of which is shaped like a slide 4. On one part

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  of its length, the base 3 has a longitudinal central groove 5. Across the groove 5, the base also has a transverse rib 6 defining with the adjacent end of the slide 4 two housings in which are mounted two jaws lateral 7 and 8 respectively articulated around an axis 9, 10 extending parallel to the longitudinal axis of the base. At their upper end, on their inner side, these jaws 7 and 810 have a chamfer 11, respectively 12, forming an engagement ramp for fitting. As can be seen in FIG. 7, the jaws 7 and 8 have the shape of a lever of the first kind articulated around the axes 9 and 10. The lower arm 7a, respectively 8a of these levers have, seen in plan, a side rounded by which they are supported on a cam 13, more precisely on the two sides 14 and 15 of a dihedral constituting the cam proper (FIGS. 2 and 5). The cam 13 is slidably mounted in the slide 4. The upper arms of the jaws 7 and 8 have a projection 7b, respectively 8b intended to come

  hang on piece 2 of the shoe.

  The cam 13 has a threaded axial hole engaged with a longitudinal screw 16 partially engaged in the groove 5 and the end opposite to the screw slot 17 is journalled in a support piece 18 guided in the slide 4. This piece support 18 is supported on a pair of parallel springs 19 working in compression between the support piece 18 and a slide 20. The thrust exerted by the springs 19 on the cam 13 has the effect of holding the jaws 7 and 8 in

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  the position shown. As can be seen in Figure 7, the jaws abut against the sides of the base 3 so that they are held

upright.

  Opposite the other end of the slide 4, is mounted a front jaw 21 against which the slide 20 comes to bear. As can be seen in FIGS. 5 and 6, the jaw is retained on the base 3 by a ball joint 22, so that the jaw 21 can pivot in all directions in the space above the base 3. In axial vertical section, as shown in Figure 6, the front jaw 21 has a C shape, the lower part 21a of which rests against the slide 20 which, at rest, keeps the jaw 21 in a vertical position. The upper part of the jaw 21 extends parallel to the base 3 and has an open V-shaped notch 23. As can be seen in FIGS. 1 and 5, the lower part 21a of the jaw 21 extends over a part only of the width of the jaw and over only part of the width of the slide 20, which has a flat front face perpendicular to the longitudinal axis of the base, against which the part 21a rests. The springs 19 work in compression between the support piece 18 and the slide 20 and these are therefore the same springs which retain the lateral jaws 7 and 8 and the front jaw 21. The setting of the precompression of the springs 19 is that is to say the hardness at the release of the fixation, is carried out by means of the

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  screw 16 which allows the support piece 18 to be moved in

bearing on the cam 13.

  On the base 3 is also articulated a lever 24 about a transverse axis 25. The lower arm 24a of the lever 24 rests against a bar 26 slidably mounted in the groove 5 and pressing itself against the cam 13. The lever 24, pushed back by the bar 26, is retained by a pair of stops 38. A pressure on the lever 24 has the effect of pushing the cam 13 through the bar 26, and consequently allowing the jaws 7 and 8 to switch over to

  away from each other.

  The plate 2, integrated into the sole of the shoe, has two opposite lateral notches 27 and 28 at the oblique inlets facilitating the engagement of the jaws 7 and 8 and the anterior oblique faces 39 and 40 of which also have a thrust function towards the before when putting on, as will be described later. The bottom of the notches 27 and 28 has an inclined plane parallel to the longitudinal axis of the plate 2, such as the inclined plane 29, which extends over approximately the lower half of the thickness of the plate 2, the rest of the thickness having a vertical face 30, respectively 31. The rear part 32 of the plate 2 follows the shape of the heel of the shoe. The front part of the plate 2 has, on approximately the upper half of the thickness of the plate, a projecting part in the form of an arc of a circle 33 and on approximately the lower half of the thickness of the plate 2 a part protruding rectangular 34 juxtaposed to the

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  part 33 so as to form two flat bearing surfaces on each side of the part 33. FIG. 4 shows the plate 2 integrated into a sole of

shoe 35.

  It can be seen in FIG. 4 that the plate 2 extends over only part of the length of the sole, which, in front of the plate 2, has a tread structure 36 separated from the plate 2 by a space allowing have an intermediate area 37

  presenting a certain flexibility facilitating walking.

  The slide 4 has two side windows 39 located opposite the support piece 18 and the edge of which is graduated to display the adjustment of the

spring precompression 19.

  To fit the binding, the bearing surfaces 34 of the plate 2 are engaged under the jaw 21 so that the rounded part 33 comes to rest in the V-shaped notch 23. The notches 27 and 28 of the plate 2 are placed opposite the lateral jaws 7 and 8, the lower edges of the ramps 29 coming to bear on the top of the chamfers 11 and 12 of the jaws. Under the pressure exerted by the heel, the plate 2 spreads the jaws 7 and 8 by sliding on their chamfers 11 and 12 by compressing the springs 19. Then the jaws 7 and 8 close by resting and sliding on the oblique faces 39 and 40, thus applying the rounded front part 33 of the plate 2 in the V-shaped notch 23 of the front jaw 21, then come to hang on the ramps 29, pressing the shoe o10 2788443 against part 1 of the fixation. The shoe is thus perfectly held transversely and longitudinally. During a front fall, the plate 2 of the shoe spreads the lateral jaws 7 and 8 by the edge of its ramps 29 by compressing the springs 19. The front jaw 21 pivots on its ball 22 by slightly pushing the slide 20. The shoe

  can thus be released from the attachment.

  In the case of a rear fall there is also simultaneity between the tilting of the front jaw 21 and the spacing of the side jaws 7

and 8.

  In torsion, the shoe first escapes from the front jaw 21, then from the side jaws 7 and 8. As already mentioned above, voluntary release takes place by pressing the lever 24 which releases the side jaws 7 and 8 and allows the shoe to be released from these jaws. The shoe can then be released from the front jaw 21

  as in the case of a conventional stop.

  The attachment described ensures stable attachment of the shoe at three points. The same result could be obtained by placing the jaw 21 behind the lateral jaws 7 and 8, the latter being able to be placed further forward relative to the heel of the shoe. In particular, the jaw 21 could retain the heel of a shoe having a rear sidewalk. In this case, the boot would start with the engagement of the heel under its retaining jaw. 5 The lateral jaws could have any other

  shape adapted to the shape of the sole of the shoe.

  The coil springs 19 could be replaced

  by one or more blades working in buckling.

  The plate 2 may not have the ranges 34.

  In this case, the jaw 21 would only provide horizontal retention, in torsion.

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Claims (12)

CLAIMS.   1. Triggerable binding for gliding board comprising a part (2) intended to be fixed to a shoe and a part (1) intended to be fixed to a sliding board, in which the part intended to be fixed to the sliding board comprises a pair of jaws (7,8) separable from each other and an elastic means (19) opposing this separation and in which the jaws and the part (2) intended to be fixed to the shoe are shaped so as to allow the jaws to move apart, when the binding is put on and when it is released, by the part intended to be fixed to the shoe and to keep the shoe on the gliding board after putting on, characterized in that it further comprises additional retaining means (21), elastically retained and triggerable, opposing at least a torsional stress around an at least approximately vertical axis of the part intended for be attached to the shoe. 2. Attachment according to claim 1, characterized in that the additional retaining means (21) are   located in front of the jaws (7,8).   3. Fastening according to claim 1 or 2, characterized in that the additional holding means consist of a jaw (21) articulated by a ball joint (22) and a slide (20) held in abutment against the lower part of said 13 2788443   jaw by elastic means, so as to maintain   this jaw in a determined position.   4. Fastening according to claim 3, characterized in that the elastic means (19) retaining the pair of jaws (7,8) is mounted between this pair of jaws and the jaw (21) of additional holding means and simultaneously ensures the withholding additional holding means.   5. Attachment according to claim 4, characterized in that the jaws (7,8) of the pair of jaws are lever-shaped of the first kind whose axis is parallel to the longitudinal axis of the attachment and in that 'They are supported on a cam (13) sliding horizontally, axially and retained by said elastic means. 6. Attachment according to claim 5, characterized in that said cam (13) is a dihedral cam.   7. Attachment according to one of claims 5 or 6,   characterized in that it comprises means (13, 16, 18) for precompression and for adjusting the precompression of the elastic means, constituted   essentially a longitudinal screw.   8. A binding according to claim 7, characterized in that the adjusting screw (16) is screwed into said cam (13) so as to be retained axially by 14 2788443   this cam and that its end carries a support piece   (18) sliding based on the elastic means.   9. A binding according to claim 8, characterized in that the part intended to be fixed to a gliding board comprises a base (3) having a slide (4) in which the sliding parts are mounted of this part.   10. Attachment according to one of claims 5 to 9,   characterized in that the part intended to be fixed to the gliding board comprises means (24, 26) for releasing the jaws from the pair of jaws constituted by a release lever (24) and a thrust piece ( 26) between the lever and said cam (13) transmitting the force of the lever to the cam for   push the cam against the action of the elastic means.   11. Attachment according to one of claims 3 to 10,   characterized in that the elastic means consists of a pair of springs (19) working in compression.   12. Attachment according to one of claims 3 to 10,   characterized in that the elastic means consists   at least one blade working in buckling.