FR2631525A1 - SOLE, IN PARTICULAR FOR SHOES OF BACKGROUND SKIING OR EQUIVALENT - Google Patents

Abstract

The invention relates to boots, in particular to cross-country ski boots. On the internal face of the sole or of the first 4, are formed transverse ribs 4 'spaced apart from each other by transverse grooves, and which confer great transverse rigidity on the sole. In order to be able to adjust the longitudinal stiffness of the sole to a desired value, it is possible to have profiled elements 6 forming cleats or fillings between the transverse ribs 4 ', which oppose a resistance to the curvature of the sole during the unwinding of the foot, this because that the transverse grooves formed between the transverse ribs 4 ′ tend to narrow by imposing a compressive stress on the profiled elements 6. Main application: cross-country ski boots with variable flexibility.

Description

The invention relates to a sole, in particular

  for cross-country ski boots or equivalent,

  a transverse ribbed sole portion, at least in the region of the eminence of the big toe, the ribs for transverse stiffening of the sole leave free transverse grooves open upwards, which allow to confer to this part the sole flexibility

  in the longitudinal direction which is large compared

  with transversal rigidity.

  A sole of this type for cross-country ski boots is described in LA-574 565. In this sole, the transverse ribs are formed by embedded or surface-bonded strips made of a high-strength thin material, for example of aluminum sheet, shaped such that the transverse stiffness of the sole corresponds to about 17 times the resistance that the sole opposes the unwinding movement of the foot. This way, we

  responds optimally to the requirements of

  traditional cross-country skiing with alternative steps.

  Feet can be practically unrestrained

  tance. At the same time, because of the trans-

  Versale of the sole, the feet have a good hold

  on the ski, however, thanks to the transverse ribs

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  rigid, it is also avoided that the long edges

  gitudinals of cross-country skiing, which is generally very narrow, can exert painful pressure through the sole of the shoe and lead, on long journeys, to pain due to

a spacing of the metatarsals.

  Meanwhile, a new development

  cross-country technique, the skater's step, that is,

  say, a progression by the skater's steps of a 1G side or both sides. In principle, this technique

  does not impose new specifications for the

  - sure of skiing or for the feet but the feet go out

  slower than in the alternate pitch, so it is desirable to have a stiffer sole

  in the longitudinal direction than in the alternate

  native. In principle, it is possible to manufacture cross-country ski boots with rigid soles in the longitudinal direction, but in this case

  case, it is not taken into account that the optimum value

  longitudinal stiffness can be very

  riable. In addition, it is desirable, for a large number of cross-country skiers, to be able to use the same shoes as well for the skater's step as for

the traditional alternative step.

  The object of the invention is therefore to create a

  which has a high transverse stiffness and variable longitudinal stiffness or that can be predetermined. This problem is solved with a sole of the kind

  indicated at the beginning by the fact that that part of se-

  has a high tensile strength in

  the longitudinal direction and that, in order to

  length of the sole on a predetermined value

  finished or predeterminable, this sole portion may be lined with profiled elements forming cleats or fills, which can be embedded in the transverse grooves and which oppose resistance to shrinkage of the transverse grooves during the unfolding movement of the foot. The invention draws

  recognition of the fact that in the course of

  of the foot, the transverse grooves tend to shrink, so that the profiled elements forming

  cleats or fills housed in the transverse grooves

  Versales are more or less heavily charged with

  pressure during the unwinding of the foot or during a

  corresponding bending stiffness of the sole and oppose a resistance to the curvature of the sole in

  a measure that corresponds to their compressibility.

  A particular advantage of the invention lies in the fact that in each case the soleplate has the desirable high transverse stiffness, irrespective of the extent to which the longitudinal stiffness has been reinforced by the profiled elements.

  cleats or fills which may be included

troduits.

  According to a preferred embodiment of the invention,

  vention, the profiled elements forming cleats or

  pleating may be arranged in another part of the sole which covers the transverse grooves and which may optionally also be in the form of an insole reported. Given

  that this other part of sole respectively se-

  inside, is loaded by the foot during use.

  In this case, the profiled elements can not protrude from the transverse ribs, so that the desired longitudinal stiffness is always ensured. Same

  time, the other part of sole, respectively se-

  inside, is held securely in the shoe due to the engagement of the elements.

  profiles in the transverse grooves.

  According to advantageous embodiments of the invention:

  - the transverse grooves are only filled with

  taper elements forming cleats or fills,

  - the profiled elements forming cleats or

  wise are assembled together by a band formed of longitudinal or perforated strips,

  - the transverse ribs and the transverse grooves

  dirty are planned on or in a first of se-

  melle, - transverse grooves and transverse grooves

  are planned - at least in a certain region -

  in a sole-forming part itself, - the transverse ribs which are essentially

  composed of a flexible material, are not

  bending stiffness than in the region of a plane or area at a distance from the bottom of the transverse grooves, for example, at the

  means of cleats, flat belts, reinforcing

  or equivalent, which are drowned or fixed in over-

face,

  the transverse grooves have a profile at.

  undercut which is filled totally or partially

  by the profiled elements forming cleats or fills, the profiled elements forming cleats or fills

  and / or the other sole part, or the formed band.

  longitudinal or perforated strips can be

  attached to the sole part which is ribbed trans-

  by a removable connection, acting by gluing or adhesion,

  - the sole has a marginal area or surface la-

  a relatively steep ascending tateral, which surrounds the foot 5 outwardly - preferably behind the area of the eminence of the big toe, in the manner of a

  shell, area or surface that supports the foot to the

  against transverse forces, the marginal region or lateral surface is connected to the transverse rib portion and / or

to the other part of sole.

  For the rest, we will refer, with regard to

  identify the characteristic features of the invention,

  description of particularly preferred forms of

  realization which will be given below with reference to the drawing. In this drawing, Figure 1 is a top view of the transversely grooved sole portion; Figure 2 is a sectional view of the sole portion, taken along the line of section Ii-Ii of Figure 1;

  FIG. 3 is a detailed sectional view of

  2, in which there is shown transverse grooves and profiled elements forming cleats or fills having different sections; FIG. 4 is a sectional view corresponding to section line IV-IV of FIG. 10

  The sole of a ski boot is a

  multilayer position and, as shown in the

  gures 2 and 4, it is composed of a sole proper 1, an intermediate layer 2, which is extended by the top 3 of the ski boot or is assembled thereto, and a first 4 of sole which is internally provided with transverse ribs 4 'and

  transversal grooves left free between these

  Nures. On the upper face of the transverse ribs 4 ', are arranged reinforcing profiles 5, in the form of flat strips, of aluminum or equivalent, to -6 - guarantee a high rigidity transverse to the first 4 and, consequently to all the sole of the shoe. The reinforcing profiles 5 can be glued to the transverse ribs 4 ', embedded in the material of the transverse ribs 4' or fixed

  in another way. In each case, the transverse rigidity

  desired versale of the sole of the shoe remains guaranteed.

  The reinforcing profiles 5 may possibly

  also be removed when the material of the transverse ribs 4 'is stiff enough to ensure the sole of the shoe stability

cross-section

  In the longitudinal direction, the first 4 remains flexible despite the presence of transverse ribs 4 'or reinforcing profiles 5, because the transverse grooves between the transverse ribs 4' allow the first 4 to bend in the direction longitudinal with only a very low resistance to bending. To be able now to increase the rigidity of the first in the longitudinal direction, it is

  provided according to the invention to introduce in certain

  cross-cuts or in all transverse grooves

  disposed between the transverse ribs 4 ', profiled elements 6 forming cleats or fills which are preferably arranged or formed on another

flexible sole part 7.

  When, during the unwinding of the foot, the sole tends to curve, the transverse grooves between the transverse ribs 4 ', or the distances

  between the reinforcing sections 5 shrink.

  In this movement, the profile elements 6 recessed

  in the transverse grooves between the nerves

  transverse vests 4 'are biased to compression accordingly. This has the effect that the pressure resistance of the first with respect to the curvatures in the longitudinal direction is increased to the extent of the compressibility of the material of the elements.

profiles 6.

  By using insole portions 7 which

  are shaped elements 6 having different

  hardnesses or present in different numbers, one can

  increase the longitudinal rigidity of the soleplate

  individual wishes of each cross-country skier.

  According to FIG. 3, the transverse grooves and the profiled elements 6 which are located between the

  transverse ribs 4 'have a rectangular section.

  In this way, replacing the insole parts,

  7 which carry the profiled elements 6 can be easily

  you. During the cross-country race, the elements

  spun 6 are held in the transverse ribs 4 'by the load applied to the sole portion 7 by 20. the skier's foot; at the same time, the sole part

7 remains fixed and immobilized.

  However, in principle, it is also possible

  sible to provide between the transverse ribs 4 ',

  transverse grooves having a counter-profile

  stripping and forming the profiled elements with a

  corresponding form, as indicated on the

  3. This ensures a particularly secure anchorage

  of the sole part 7 in the shoe.

  Moreover, the transverse ribs 4 'or the transverse grooves formed between these ribs

  can be extended down to the se-

  themselves 1, that is to say that they may also be present in the intermediate layer 2 as well as in the soleplate itself.

  way, you can get a sole sole shoe

  In the longitudinal direction when the profiled elements are not mounted. On another side; by placing the profiled elements 6,

  it is possible to obtain a particular longitudinal rigidity

  high. To give also to the foot of the skier

  a particularly good hold in the lateral direction

  when skiing, it can be provided on the first 4 and / or on another part of the sole, a lateral zone or lateral surface 8 relatively stiff on the outside of the foot, which surrounds the foot

  laterally, preferably just behind the

  of the eminence of the big toe, that is to say

  out of the area of the sole of the shoe that is particularly stressed bending during the

skiing.

  Unlike the embodiments of

  presented, the sole portion 7 which has the profiled elements 6 can also be made under the

  form of an insole reported.

  In addition, it is in principle also possible

  to produce the profiled elements 6 in the form of

  separate elements. In replacement, it is also possible

  sible to join the profiled elements 6 by one sheet

  thin formed of longitudinal strips, or perforated.

  If necessary, the profiled elements 6 and / or

  the sole portion 7 or the strip consisting of

  longitudinal or perforated sheets used as replacements

  additionally, may be fixed at the first

  4 by a separable assembly, gluing or adhesion.

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Claims (9)

- REVENDICAI2ONS - I - Sémelle, in particular for cross-country ski boots or equivalent, comprising a transverse ribbed sole portion at least in the region of the eminence of the big toe, the ribs serving for the transverse stiffening of the sole leave it free between them transverse grooves open upwards which make it possible to give the sole part a flexibility in the longitudinal direction which is large compared to the transverse rigidity, characterized in that the sole part (1, 2, 4) has a high tensile strength in the longitudinal direction and, in order to adjust the longitudinal rigidity of the soleplate to a predefined or predeterminable value, this sole part may be packed with profiled elements forming cleats or fills (6 ) which can be embedded in the transverse grooves, and which oppose a resistance to the narrowing of the grooves tr ansversales during the movement of unwinding of the foot.   2 - sole according to claim 1, characterized   characterized in that the transverse grooves are only partly filled with profiled elements forming cleats or fills (6) "   3 - sole according to one of claims 1 and 2,   characterized in that the profiled elements forming cleats or fills (6) are joined together by a strip formed of longitudinal or perforated strips.   4 - sole according to one of claims 1 and 2,   characterized in that the profiled elements forming cleats or fills (6) are mounted on another   part of the sole (4) which covers the transverse grooves versales. 263152 5   -10- - Sole according to any one of the claims   I to 4, characterized in that the elements   forming strips or fills (6) are attached to   an insole of the shoe.   6 - Sole according to any one of the claims   1 to 5, characterized in that the transverse ribs   versales (4 ') and the transverse grooves are pre-   views on or in a first (4) sole.   7 - Sole according to any one of the claims   I to 6, characterized in that the transverse grooves   Versales (4 ') and transverse grooves are provided - at least in a certain region, in a part forming sole proper.   8 - Sole according to any one of the claims   1 to 7, characterized in that the transverse ribs   versales (4 ') which are essentially composed of a flexible material, are not of a rigid constitution to the   bending than in the region of a plan or zone if-   killed at a distance from the bottom of the trans-   Versales, for example, by means of cleats, flat strips, reinforcing profiles (5) or the like,   which are embedded or fixed on the surface.   9 - Sole according to any one of the claims   I to 8, characterized in that the transverse grooves   Versales have an undercut profile which is completely or partially filled by the elements   bead or filler profiles (6).   Sole according to any one of the claims   I to 9, characterized in that the elements   cleats or fills (6) and / or the other sole part (7), or strip formed of strips   longitudinal or perforated can be attached to the   outsole (4) which is transversely ribbed   by a removable connection, acting by gluing or adhering ence. -11-   11 - Sole according to any one of the claims   cations I to 10, characterized by a relatively steep, upwardly facing marginal zone or surface (8), which surrounds the foot externally preferably behind the eminence zone of the big toe, in the manner of a shell, zone or surface that supports the   foot against transverse forces.   12 - sole according to claim 11, characterized   in that the marginal region or lateral surface   Rale (8) is connected to the transverse ribbon part (4) and / or to the other sole part (7).