FR2663857A1 - DEVICE FOR SUPPORTING THE FRONT PART OF A SKI SHOE ON A SKI. - Google Patents

Abstract

This device, which is associated with a safety front stop, takes the form of a flat case (1) which is movable in any direction relative to the ski (S) and is connected to the plate (3) of the front stop (30) by a cable (2) partially retractable in the housing (1), the latter containing resilient means adapted to ensure the retraction of the cable while normally applying the housing against the plate while keeping it centered on the ski. Accessory for ski.

Description

DEVICE FOR SUPPORTING THE FRONT PART OF A SHOE

SKI ON A SKI

  The present invention relates to a support device

  the front part of a ski boot on a ski, this arrangement

  This is associated with a safety front stop.

  A safety binding for modern skiing, consisting of a front stop and a heel, is equipped with a support device of the shoe, and more precisely the sole of the boot, on the ski This device comprises a sliding pad which is associated with or integrated with the front stop and is intended to serve as a support for a smooth area, of standardized location and dimensions, which is provided under the front part of the soleplate.

  This wafer is lined with a low-cost material.

  friction, for example PTFE (polytetrafluoroethylene).

  A device of this kind, which is described for example in document FR-A-2 150 314, generally gives satisfaction.

  under the usual conditions of use.

  On the other hand, when the underside of the soleplate is worn and / or fouled, the parasitic friction that develops between the soleplate and the backing pad can reach a high level by dangerously modifying the parameters of

triggering the fixation.

  It has already been attempted to solve this problem by proposing a device in which the support plate is movable, so that, in the event of high friction between the plate and the sole, this plate can be driven together with the sole, according to a trajectory identical or at least very close; thanks to this arrangement, the displacement therefore occurs

  not between the shoe and the pad, but between the

  riding and skiing, and this movement can be done in a

  protected from harmful influences due to wear and / or

fouling of the sole.

  Thus, the documents FR-A-1 518 462 and FR-A-1 563 021 relate to devices whose support plate can move parallel to the upper surface of the

  ski in any direction Elastic return means

  are provided which, after triggering the safety binding, ie when the boot has left the ski, automatically return the support plate to its position

median, centered on skiing.

  The document FR-A-1 518 462 describes a laterally movable support plate whose longitudinal displacement is imposed.

  by the means that guide its lateral displacement.

  FR-A-1,563,021 discloses a movable plate in

  several longitudinal and transverse directions.

  deny, however, lies in its bulkiness (Figures 1 to 7) or else in the limitation of its range of motion (figures

8 to 11).

  Unfortunately, these known devices do not solve all the problems associated with a significant friction

  between the sole and the ski It can happen in particular, especially

  by extreme cold during the skier's transport on a tele-

  seat, it forms between the sole and the support device a layer of frozen ice block, very strong adhesion Even if

  the support plate is movable in the plane of the ski, this adhesive

  ence may jeopardize the operation of the fixation in

  certain fall configurations such as combined rear

  torsion or rear pure, in which the sole must deviate from the surface of the ski; it should be noted that, increasingly, the modern front stops are designed to offer safety also in this type of falls It is therefore important that the support devices associated with these stops before do not

  the operation, or at least the negligent

geable.

  The object of the invention is to propose such a device

  tif, this one being nevertheless simple, robust, can costly,

  compact, easy to use, and adaptable with little modification

  on an ordinary front mounting plate (mounting plate).

  These various results are achieved according to the invention in that the support device has the shape of a flat housing which is movable in any direction relative to the ski and is connected to the plate of the front stop by a cable partially retractable in the housing, and that the latter

  contains elastic means suitable for retracting

  cable while applying the casing to the platen

the now focused on skiing.

  This device has an almost total freedom of movement (including in a vertical direction). Only the forward movement is impeded by the front stop. This is not a disadvantage because this stop prevents the support plate from slipping.

  forward when engaging the shoe.

  Preferably, the support device comprises additional centering means which consist of a prominence having, in top view, the shape of a "V" adapted to engage in a complementary recess provided in the plate; this provision can be reversed, the prominence being then provided on the

  platinum while the recess is formed in the housing.

  According to another characteristic, prominence and

  the recess are traversed axially by the cable.

  According to another characteristic, the protrusion and the recess have support surfaces that are inclined relative to the surface of the ski so that they maintain the housing against the ski under the action of the means

  elastics that encloses the housing.

  In a first embodiment, the cable is wound on a rotating drum mounted in the housing; in this case the elastic means may consist simply of a spring

spiral acting on the drum.

  In another embodiment, the cable forms a loop inside the housing, this loop being able to tighten

  against the elastic means; these may

  ter for example in springs that solicit a series of sliding pistons applying against the loop; in

  variant they may consist of an elastically deformed

  ble placed inside the loop.

  Other features and advantages of the invention

  will appear from the description and accompanying drawings which in

  present preferred embodiments.

  In these drawings: Figures 1 and 2 are schematic views in

  of a first embodiment of the device, respectively

  centered on the ski and moved as a result of

  Figures 3 and 5 are partial top views

  cut which correspond to Figures 1 and 2 respectively;

  FIG. 4 represents a cross-section of the arrangement

  sitive, according to the sectional plane IV-IV of Figure 3, on a larger scale;

  Figures 6 and 7 are partial top views

  cut off from a second embodiment of the device, respec-

  in a centered position on the ski and in an off-center position as a result of a trip; Figure 8 is a top view in section of a third embodiment of the device; FIG. 9 is a detailed view showing a possible variant of the means for centering the device with respect to the

Platinum of the front stop.

  In all the drawings, with the exception of Figure 4 which refers to a cross section, the tip of the ski is

located to the right of the figures.

  In FIG. 1, the ski on which the device 1 is mounted is designated by the reference S, the latter being associated with a safety front stop 30 referenced and shown in strong phantom lines. The base plate, or plate, 3 of FIG. the stop before

  is fixed on the ski in a traditional manner by means of screws 31.

  The device 1 has the shape of a flat box of circular contour which is connected to the plate 3 by a cable 2; it's about

  flexible and non-extensible wire, made of metal or synthetic material

  tick, which is retractable inside the housing 1, this retraction being accomplished by elastic means which will be described later, which are housed inside the housing and tend to fit the cable in the housing It will be noted elsewhere that the housing 1 has a protrusion, or appendix, 14 which, in top view, has the shape of a "V" and is intended to engage in a recess of complementary shape 32 formed at the rear of the plate The appendix 14 and the recess 32 are crossed by the cable 2, the latter being retained by its free end in the plate 3 Under the action of the elastic means that encloses the housing 1, it therefore occurs on the cable a force traction that automatically tends to engage the portion 14 in the recess 32, which ensures the centering of the

  housing along the longitudinal axis XX 'of the ski.

  Being retained in the plate only by the cable 2, the housing can move freely (against the elastic means) in any direction, not only parallel to the ski but also away from it and by tilting above

  ski, as shown in Figure 2.

  It is therefore understood that even if the housing 1 adheres strongly

  below the sole, this grip does not interfere with the exhaust of the shoe, regardless of the direction of this exhaust, since the housing is free to accompany the shoe. In the embodiment of FIGS. 3 to 5, reference numeral 33 designates the passage hole of the cable 2 at the bottom of the recess 32, in the thickness of the plate 3. The end of the cable is provided with an attachment member 34, for example a small bead, which is inserted into a housing 34 formed in the

  platinum; this accommodation is for example an extension of the

hole 33.

  The appendix 14 is traversed by a hole 15 which is normally in the extension of the hole 33 of the plate, by

  which the cable penetrates inside the housing 1.

  As can be seen more particularly in FIG. 4, this casing has the general shape of a cylinder of low height, of the type of shoebox. Preferably, its diameter corresponds to the width of the ski, where it is slightly less than this. ; this diameter is for example 60 mm, while its height is

the order of 10 to 15 mm.

  The housing 1 is formed of a bottom 10 with a cylindrical lateral wall 11, and a lid 12 secured to the bottom, by

example by gluing.

  This case is made of a material having a high

  mechanical resistance, because it must support the weight of the skier.

  The bottom 10 and the cover 12 receive the ends of an axis 13 on which is mounted a rotary drum 4.

  preferably made of plastic, has a peripheral groove

  The inner end 21 of this cable (end which is in the housing) is fixed to the drum. The drum 4 has a central recess 40 in which

  is housed a spiral spring 5, one end of which is solid.

  of the casing and the other of the drum Spring 5 is constantly

  rotation of the drum inside the housing in the direction of winding of the cable, which ensures the retraction of the latter inside the housing, as shown in FIG.

Figure 3.

  In this position, the spring 5 also ensures the proper centering of the housing along the axis XX 'of the ski by the cooperation of the

parts in "V" 14 and 32.

  It is this position which corresponds to the normal practice of the ski, in which the underside of the sole rests on the top of the casing 1, while the jaw of the front stop

  retains the tip of the shoe also centered on the ski.

  In case this safety trigger by opening the

  front stop, the housing 1 can move along the road

  sure, even if there is a high friction between the sole and the case.

  This displacement of the casing, which is represented in FIG. 5, results from the traction which develops on the cable 2. This traction makes the drum 4 rotate around the axis 13, whereas the spiral spring 5 is biased in the direction of its winding

on himself.

  Of course, the force of the spring 5 is chosen to

  that it does not appreciably interfere with the freedom of movement

  housing; it must, however, be sufficient to ensure the automatic refocusing, frankly, of the housing on the

  ski once the shoe has been released; this automatic refocusing

  This will be ensured by the cooperation of the parts 14 and 32, during the retraction of the cable in the housing (due to the relaxation of the spring).

  The possible path of deployment of the cable 2 is preferably

the order of 40 mm.

  It should be noted that the cable passage hole 15 flares gently, through arcuate walls 16 towards the inside of the casing, so as to limit the friction of the cable at this level.

  both at the moment of its deployment and at the moment of its retraction.

  In the second and third embodiments,

  6, 7 and 8 respectively, identical references have been used to denote the identical or

  similar to those of the first embodiment.

  The casing of FIGS. 6 and 7 is a flat box of generally rectangular contour, with rounded corners. The cable 2 forms a loop 25 inside the casing As in the first embodiment, the outer end 20 of the cable

  is fixed to the plate 3 of the front stop; the end

  21 is attached to the front wall of the housing.

  the loop is arranged a fixed stop 8 (integral with the housing).

  This serves as a support seat to a series of three small compression springs Each of them solicit a piston

  which is guided in translation by appropriate means not

  In the embodiment shown, one of the pistons, referenced 6, is axially movable towards the rear of the ski and is biased by a spring 60. The other two pistons, referenced 7, are oriented obliquely. towards the rear and toward the edges of the ski and each urged by a spring 70 The three pistons are applied against the loop 25 by the springs and they therefore tend to increase the size of the ski.

  this loop, which has the effect of retracting the cable to the

  the case by centering the case on the ski

  thanks to the cooperation of parties 14 and 32.

  The deployment of the cable, which is shown in Figure 7, has the effect of tightening the loop by compressing the

springs 60, 70.

  In the third embodiment shown in Figure 8, the housing has a generally rectangular shape with arcuate front and rear edges The cable 2 forms inside the housing 1 a loop 25 'which is formed in the manner of a node Indeed, the inner end of the cable 21 is provided with an eyelet 22 which is traversed by the portion of cable spring

of the case.

  The loop 25 'encloses an elastic buffer 9 which is fixed

  inside the case, in the central part of it.

  In the example shown, this buffer has a pentagonal contour The buffer 9 is made of an elastically deformable synthetic material, preferably porous and flexible synthetic rubber. Recesses 90 and holes 91 are advantageously formed in this buffer to improve deformability. and,

  correlatively, the possible amplitude for the deployment of the cable.

  In the variant of FIG. 9, the appendix 14 has an upper face 140 which is inclined forwards at a sharp angle u with respect to the ski surface. The recess 32 has a complementary bearing surface 35 of which the role is to apply the housing against the ski Indeed, the traction f which develops on the cable as a result of the action of the elastic means tends to move the housing against the plate 3 (arrow g) By corner effect, it follows at the level of the bearing faces 35, 140, a force h directed downwards which tends to maintain the applied housing

against the surface of the ski.

  Thanks to such an arrangement, there is no flutter

  inconsiderate of the case with respect to the ski, which would be

  user-friendly, especially during periods of non-use,

  when he wears his skis for example.

  Of course, the contacting parts 35, 140 must be shaped and positioned so as not to upset the

  freedom of release of the housing.

  Note that the underside of the housing is lined with a film 120 of low friction material, for example PTFE adapted to ensure good sliding of the housing on the ski Similar fittings may be provided on the ski,

  as well as on the top of the case.

  The housing according to the invention may have varied va.1 shapes

Claims (8)

  1 Support device for the front part of a ski boot on a ski, which is associated with a front safety stop, characterized in that it affects the shape of a flat casing (1) which is movable in any direction relative to the ski (S) and is connected to the plate (3) of the front stop (30) by a cable (2) partially retractable in the housing (1), and that the latter contains elastic means ( 5; 60; 70; 9) adapted to provide retraction of the cable (2) while applying the housing   (1) against the board (3) keeping it centered on the ski (S).   2 Support device according to claim 1, characterized   characterized in that it comprises additional centering means which consist of a protrusion (14) having, in plan view, the shape of a "V", adapted to engage in a complementary recess   (32) provided in the plate (3), or vice versa.   3 Support device according to claim 2, characterized   in that said protrusion (14) and said recess (32)   are traversed axially by the cable (2).   4 Support device according to one of claims 2 or   3, characterized in that said protrusion (14) and said recess   (32) have mutual support surfaces (140, 35) which are inclined with respect to the ski surface in such a way as to maintain the housing (1) against the ski (S)   under the action of said elastic means (5; 6, 7; 9).   Support device according to one of claims 1 to   4, characterized in that the cable (2) is wound on a drum   rotating (4) mounted in the housing (1).   6 Support device according to claim 5, characterized   in that said elastic means (5) consist of a   spiral spring acting on the drum (4).   7 Device according to one of claims 1 to 4, characterized   characterized in that the cable (2) forms a loop (25; 25 ') inside the housing (1), this loop being able to tighten to   against said elastic means (60, 70; 9).   8 Support device according to claim 7, characterized in that said elastic means are springs (60) which urge a series of sliding pistons (6, 7)   applying against the loop (25).   9 Support device according to claim 7, characterized   in that said elastic means consist of a buffer   Plastiquement deformable (9) placed inside the loop (25).