FR2656775A1 - SKI SHOE IN PLASTIC MATERIAL. - Google Patents

Abstract

A plastic ski boot consists of a shell part (1), intended to receive an inner boot (bootee), comprising a median longitudinal plane and a collar (5, 6, 7) articulated on the shell part (1). The boot comprises a rigid U-shaped stirrup piece (10) whose connecting portion (13) of the branches (11, 12) of the U is articulated on the rear (4) of the shell part (1), about a spindle (15) arranged in a longitudinal plane of the shell part. The collar (5, 6, 7) is articulated (20) on the two branches (11, 12) of the rigid stirrup piece (10).

Description

SKI SHOE IN PLASTIC MATERIAL.

  The invention relates to a new ski boot

made of plastic

  Ever since, footwear for training

  alpine skiing, whether in leather or leather

  plastic, aimed to enclose the articulation of the

  city by means of a rising stem As this stem, for reasons of comfort, lacked rigidity in the lateral planes, it was proposed to add reinforcements at the malleoli (see for example

document FR-A-1 126 585).

  As the locking of the ankle joint has drawbacks for longitudinal flexion, it has been suggested to make the shoe in two parts, namely an upper stem called "collar" and a part

  the so-called "shell" bass, these two parts then being

  along an axis substantially perpendicular to the plane

  longitudinal (see document FR-A-1,253,682).

  This is the reason why all the plastic ski boots used until now, are designed according to this basic architecture which aims to condemn the free movement of the foot on the ankle, while still allowing the leg a certain freedom of longitudinal flexion regulated and controlled. However, the evolution of the ski technique results in an increase in speeds, the need for a greater finesse of perception of the sensations to obtain

  better precision in driving skis.

  As is known, a ski boot made of plastic material essentially comprises: a shell intended to receive a bootie which in turn receives one foot of the skier; a hinged collar on the hull, intended to enclose the bottom of the leg, consisting of either a single part or two parts called then cuffs, respectively front and rear; clamping means of the collar on the bottom of the

leg and foot in the hull.

  To this day, the single collar or both men

  hulls are articulated on the hull, exclusively around an axis substantially perpendicular to the median plane of

shell.

  The invention relates to a plastic ski shoe of the hull and articulated collar type, in

  which respects all the degrees of freedom of the jam-

be, ankle and foot.

  This plastic ski boot constitutes

killed by:

  a hull, intended to receive a slipper and

  carrying a median longitudinal plane; a collar, hinged to the hull, is characterized in that it comprises a U-shaped rigid stirrup, the connecting portion of the arms of the U is hinged to the rear of the hull around an axis arranged in a longitudinal plane of the hull, and in that the collar is articulated on both

branches of the rigid stirrup.

  In other words, the invention consists in articulating

  the collar relative to the hull in two orthogonal planes

  gonals, respectively one to allow the debate-

  forwardly in a longitudinal plane, the other the deflections in the lateral direction in a plane substantially orthogonal to the longitudinal plane, and this thanks to a spacer: the rigid yoke articulated around the hull, preferably at the heel,

  so that this rigid stirrup is articulated around the ar-

  hull, like a ball joint.

  Thus, the shoe allows the skier to use in its entirety all the movements of the leg on the

  ankle and foot, both in the longitudinal plane and

  dinal only in the lateral plane and all the derived plans, which we did not know how to obtain in shoes of

  current ski made of plastic material.

  Advantageously, in practice: the axis of articulation of the stirrup on the shell is disposed near the top of the calcaneus in a plane parallel to the plane of the base of the soleplate; alternatively, this axis is inclined downwards towards the sole in a direction from the top of the heel to the arch;

  the two branches of the stirrup marry in

  the external form of the bulges of the shell at the level of the malleoluses, and the collar is articulated on the

  two branches of the rigid stirrup on a perpendicular axis

  to its median plane and disposed at the level of the

  the; the axis of articulation of the collar on the stirrup is in a plane perpendicular to the longitudinal plane of the hull; the inner face of the free end of the lateral branches of the U-shaped stirrup has a rounded convex shape intended to match the concave external shape of the bulges of the malleolus on the shell; the movement of the stirrup on the hull is limited by molded nipples, arranged on the sides of the hull, through a light provided for this purpose, formed in the branches of the stirrup; the side flanks of the hull, and preferably

  the lower part have viscoelastic elements

  ticks, adjustable in height, intended to limit and cushion the movements of the stirrup; the parts next to the caliper

  hull, and stirrup and collar, are

  green materials with a low coefficient of friction: polytetrafluoroethylene for example; the axis of articulation of the rigid stirrup on the hull is located in a longitudinal plane and in a plane parallel to the base of the sole of the passing hull

  between the two malleoli, respectively internal and ex-

  dull, and preferably equidistant from these two

  léoles. The way in which the invention can be realized and the benefits derived therefrom will emerge more clearly from

  examples of implementation that follow, in support of the

annexed.

  FIG. 1 illustrates, seen from the side, a first embodiment of the invention of a shoe with

unique necklace.

  FIG. 2 also shows a side view of another embodiment of the invention adapted to the shoes.

  rear entry seals (front and rear cuffs).

  Figure 3 shows in longitudinal section the back of the heel side shoe, while Figure 4 is a

  rear view of this shoe.

  FIG. 5 shows a perfective embodiment

  this back of the shoe, while the

  Figure 6 shows a section A-A of this embodiment.

  Referring to FIGS. 1 and 2, the ski boot comprises a shell (1) made of plastic material of common use and hardness for this application. This shell (1) comprises a sole (2) and a heel (3) with

  a back (4) The shoe also includes a collar

  bind single (5) (Figure 1) or two cuffs, respec-

  front (6) and rear (7) (Figure 2).

  (8) and (9) denote known clamping members (8) of the foot in the shell and (9) of the collar on the bottom of the leg, such as buckles, racks, etc. According to a first characteristic of the invention, the shoe comprises a rigid U-shaped stirrup, designated by the general reference (10), for example of molded plastic, possibly reinforced, or

  This rigid stirrup has two lateral branches

  the, respectively (11) and 12), interconnected by

  a connecting portion (13) The connecting portion

  (13) of the two lateral branches (11, 12) is articu-

  in (15) on the rear (4) of the shell (1) at the heel, and more precisely at or near the top of the calcaneus This axis (15) is disposed in a longitudinal plane of the shell. two branches (11,12)

  (see figure 4) of the stirrup (10) marry, in coifs

  gh, the external shape (16,17) of the bulges of the shell (1) at the malleoli shown dashed and referenced (18) in Figure 3 It is easily understood that this rigid yoke (10) behaves vis-à- screw of the hull (1), and more precisely of the back of the hull

  (4), like a kneecap, which allows it to

  to pull around the hull and more precisely around an axis arranged inside a longitudinal plane and a plane parallel to the plane of the sole (3), in the

direction indicated by the arrow Fl.

  The axis of articulation (15) of the rigid stirrup (10) on the shell (1) is as already said located in the plane

  longitudinal axis and in a horizontal plane

  port to the plane of the sole (3) of the shell (1), passing between the two malleoli (18) respectively internal and

  external, and equidistant from these two malleoli.

  According to another characteristic of the invention, the single collar (5) (FIG. 1) or the two sleeves (6, 7) (FIG. 2) are articulated at the level of the malleoli (18) on the two branches (11, 12 ) of the stirrup (10) on axes or more precisely on pins molded for this purpose (20,21) The articulation axis defined

  the two points of articulation (20,21) is

  perpendicular to the median plane (P) of the stirrup (

  4) In practice, the inner face of the free end of these lateral branches (11, 12) has a

  convex rounded shape, intended to conform to the ex-

  concave dull bulges of the malleoli (18) on the shell (1) Similarly, the respective faces facing the yoke (10) of the shell (1) and the yoke (10) and the collar (5, 6 or 7), are covered with

  low coefficient of friction, especially of polytetramethylene

  fluoroethylene. In this way, as is already known, the collar (5; 6, 7) is articulated in the direction indicated by the arrow

  F 2, about an axis perpendicular to the longitudinal plane.

  The movement of the stirrup (10) on the shell (1) is limited (see FIGS. 5 and 6) by studs or lugs (30), integrally molded, arranged on the flanks of the

  hull (1), passing through a light (31) provided for this purpose

  fet, formed in the branches (11,12) of the stirrup (10).

  The characteristic axes (15,20,21) can be

  made in any known manner: rivets, nipples, er-

  gots, etc. In an improved version not shown, the bottom of the lateral flanks of the shell (1) has viscoelastic elements, adjustable in height, for limiting and damping the deflections of the branches

  (11,12) of the caliper down, so the collar.

  In another embodiment not shown, the

  shoe has means for locking

  visually the deflections of the stirrup (10) around its articulation axis (15) and this, for example for the

practice of slalom.

  It is easy to understand that thanks to this caliper

  articulated (10) articulated (F1) around the shell (1) on an axis (15) arranged in a longitudinal plane, on which is in turn articulated (F 2) the collar (5, 6, 7), which this together allows the collar to have degrees of freedom in all planes and inclinations, like the foot and leg that can move

freely around the ankle.

  The ski boot according to the invention has many advantages. One can cite: a better flattening of the skis on the snow in direct traces; the possibility of amortized travel in all

  the directions authorized by the ankle, which

  improve comfort, in particular by eliminating shocks during lateral support; a better recovery of the edges, because it is now performed at the ankle and no longer the knee, thereby implementing shorter lever arms, so more precise, which allows

faster gestures.

Claims (8)

  1 / A ski boot made of plastic material, constituted by: a shell (1), intended to receive a shoe having a median longitudinal plane; a collar (5, 6, 7) articulated on the shell (1), characterized in that it comprises a rigid stirrup (10) made of   U-shape, the connecting portion (13) of which   11 (12) of the U is articulated on the rear (4) of the shell (1), about an axis (15) arranged in a longitudinal plane of the shell, and in that the collar (5, 6.7) is articulated (20)   on the two branches (11,12) of the rigid stirrup (10).   2 / Ski boot according to claim 1, characterized   characterized in that the axis of articulation (15) of the stirrup (10) on the shell (1) is disposed near the top of the calcaneus in a plane parallel to the plane of the base of the soleplate.   3 / Ski boot according to claim 1, characterized   characterized in that the axis of articulation (20) of the collar (5, 6, 7) on the stirrup (10) is perpendicular to its plane medial longitudinal.   4 / Ski boot according to claim 1, characterized   characterized in that the two arms (11, 12) of the stirrup   (10) marry, by styling it, the external shape of the   parts of the shell (1) at the level of the malleoli (18), and in that the collar (5) is articulated on the two branches (11, 12) of the rigid yoke (10) on an axis (20) disposed in a plane perpendicular to the longitudinal plane of the   shell and arranged at the level of the malleoli (18).   Ski boot according to one of claims 1   to 4, characterized in that the inner face of the end   free movement of the lateral branches (11,12) of the U-shaped stirrup (10) has a convex rounded shape intended to conform to the concave external shape of the bellows.   malleolus (18) on the shell (1).   6 / ski boot according to one of claims 1   to 5, characterized in that the movement of the stirrup (10) on the shell (1) is limited by studs (30) integrally molded, arranged on the sides of the shell, passing through a slot (31) provided in this effect, arranged   in the branches (11, 12) of the stirrup (10).   7 / ski boot according to one of claims 1   to 6, characterized in that the lateral flanks of the   shell (1) has viscoelastic elements, which are   in height, intended to limit and cushion deflections of the stirrup (10).   8 / ski boot according to one of claims 1   7, characterized in that the parts facing each other   of the stirrup (11,12) and the hull (1), and the stirrup (11,12) and the collar (5,6,7) are covered   of a material with a low coefficient of friction: poly- tetrafluoroethylene.   9 / Ski boot according to claim 2, characterized   characterized in that the articulation axis (15) of the stirrup   rigid (10) on the shell (1) is located in the long plane   median gitudinal of the hull and in a plane (H) parallel to   aligns with the plane of the sole (3) of the hull (1), passing   between the two malleoli respectively internal and ex-   dull, and preferably equidistant from these two léoles. he   Ski boot according to one of the claims   1 to 9, characterized in that the collar consists of two sleeves (6, 7) articulated on the stirrup (10) on two distinct axes.