EP3195748B1 - Sole of footwear for cross-country skiing - Google Patents

Sole of footwear for cross-country skiing Download PDF

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Publication number
EP3195748B1
EP3195748B1 EP16425002.9A EP16425002A EP3195748B1 EP 3195748 B1 EP3195748 B1 EP 3195748B1 EP 16425002 A EP16425002 A EP 16425002A EP 3195748 B1 EP3195748 B1 EP 3195748B1
Authority
EP
European Patent Office
Prior art keywords
sole
component
cross
sports shoe
anterior part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16425002.9A
Other languages
German (de)
French (fr)
Other versions
EP3195748A1 (en
Inventor
Giuseppe Garbujo
Giovanni Meneghini
Massimo Poloni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rossignol Lange SRL
Original Assignee
Rossignol Lange SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rossignol Lange SRL filed Critical Rossignol Lange SRL
Priority to EP16425002.9A priority Critical patent/EP3195748B1/en
Priority to US15/410,527 priority patent/US10834994B2/en
Publication of EP3195748A1 publication Critical patent/EP3195748A1/en
Application granted granted Critical
Publication of EP3195748B1 publication Critical patent/EP3195748B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A43B5/0411—Ski or like boots for cross-country
    • A43B5/0413—Adaptations for soles or accessories associated with soles for cross-country bindings
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A43B5/0411—Ski or like boots for cross-country
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/04—Plastics, rubber or vulcanised fibre
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/141—Soles; Sole-and-heel integral units characterised by the constructive form with a part of the sole being flexible, e.g. permitting articulation or torsion
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/16—Pieced soles
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/22—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
    • A43B13/223—Profiled soles
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
    • A43C15/00—Non-skid devices or attachments
    • A43C15/16—Studs or cleats for football or like boots
    • A43C15/168—Studs or cleats for football or like boots with resilient means, e.g. shock absorbing means

Definitions

  • the invention relates to a sports shoe sole, according to independent claim 1, and to a series of cross-country ski boots incorporating such a sole, according to independent claim 15. It also relates to a method of manufacturing such a sole, according to independent claim 16.
  • EP 1 803 362 A1 discloses a sole according to the preamble of claim 1.
  • a first object of the present invention consists in proposing a shoe sole which makes it possible to achieve sufficient rigidity, in particular resistance to bending and/or torsion, for use for cross-country skiing.
  • a second object of the present invention is to provide a shoe sole having a minimum weight.
  • a third object of the present invention consists in proposing a shoe sole which makes it possible to achieve satisfactory comfort.
  • a fourth object of the present invention is to provide a shoe sole which can be manufactured at reasonable cost.
  • the shoe sole comprises a first component forming a chassis and at least one second component assembled to the first component, characterized in that the second component comprises a front part extending substantially longitudinally in the front part of the sole.
  • the vertical direction designates the direction from bottom to top, that is to say from the sole of the shoe to the top of the shoe.
  • underside of the sole will designate the lower surface of the sole, visible from the outside of the shoe and intended to come into contact with the ground or a ski
  • the term “overhead of the sole” conversely designating the upper surface of the sole, oriented towards the inside of the shoe.
  • the longitudinal direction designates the direction perpendicular to the vertical direction, oriented from the back to the front of the shoe (and of the sole).
  • the transverse direction is the direction perpendicular to the longitudinal direction in the plane of the sole. The two longitudinal and transverse directions define a horizontal plane, in which the sole of a stationary shoe is substantially placed.
  • the figure 8 and 9 illustrate perspective views from below of a cross-country ski boot sole 20 according to one embodiment of the invention.
  • the sole is composed of two separate main components, assembled.
  • the figures 1 and 2 illustrate the first component 1, forming a frame of the sole.
  • the figures 3 to 7 illustrate the second component 21 of the sole.
  • the figures 1 and 2 thus illustrate a first component 1 forming a frame of a sole 20 according to the embodiment.
  • This frame forms the whole of the sole 20, with the exception of openings 2, 12 in part central intended to receive the second component 21, as will be explained later.
  • This frame 1 extends over the entire length of the sole 20. In particular, it forms the entire outline of the sole 20. Thus, it forms the heel of the sole 20, comprising a few studs 3 according to a conventional geometry. It then comprises a front part forming a support for a bar or connecting pin 4 oriented transversely and allowing the connection with a binding, as standardized.
  • the front part of the frame comprises two lateral parts 7 delimited by a central longitudinal opening 12, which extends towards the central/rear opening 2, which is wider and located further back, approximately in the rear part of the sole.
  • These two side parts 7 each comprise a succession of front studs 5, substantially aligned in the longitudinal direction, and delimited by grooves 6.
  • the front studs 5 and transverse grooves 6 of the two side parts are aligned on either side of the longitudinal central opening 12.
  • the central/rear opening 2 is positioned between the rear studs 3 and the front studs 5.
  • the chassis is advantageously formed in a plastic material, such as for example a polyurethane, or Pebax ® (polyether block amide) with a hardness of between 50 and 70 Shore D. It is preferably made of a single material to reduce costs but it is will not depart from the scope of the invention if it is composed of several materials.
  • the heel area could be made of another material, for example. It is advantageously manufactured by an injection step. It guarantees the comfort of use of the shoe and contributes to the mechanical properties of the sole in flexion, torsion and lateral flexion.
  • this frame may comprise two longitudinal ribs 8 forming a reinforcement, extending on either side of the central/rear opening 2, mainly making it possible to stiffen the sole in torsion.
  • the figures 3 to 7 illustrate a second component 21 of the sole 20, intended for assembly with the first component 1 described above, in particular at its openings 2, 12.
  • This second component 21 has the function of providing the rigidity/flexibility necessary for the entire sole, to achieve good performance when skiing.
  • it is preferably in a different material from that of the frame. It is preferably made of a more rigid material in the context of a "skating" practice, thus limiting the bending of the sole 20, in particular in the front part.
  • “classic” practice it is preferably in a more flexible material or of similar rigidity to that of the frame to create a zone of flexion in the front part of the sole, mainly in the area of the metatarsals.
  • the second component 21 can be made of a plastic material, such as a polyurethane or Pebax® (polyether block amide) with a hardness of between 50 and 70 Shore D.
  • a plastic material such as a polyurethane or Pebax® (polyether block amide) with a hardness of between 50 and 70 Shore D.
  • it can be made of a plastic material filled with fibers or in composite material. Alternatively, it may be all or part of metal.
  • the second component 21 is preferably formed entirely from the same material, for the sake of simplicity, but may as a variant comprise several materials, and achieve rigidity/flexibility properties as sought.
  • the figures 3 and 4 illustrate the second component 21 of the first embodiment which corresponds to a component adapted more particularly for the practice of skating.
  • This second component 21 comprises a rear part 22 of large surface area, presented as a reinforcement plate, intended to occupy the substantially central opening 2 and/or rear of the sole.
  • the second rigid component 21 is intended to occupy a large area of the surface of the finished sole 20, extending over more than half the width of the sole, to fulfill a function of resistance to torsion of the sole.
  • This second component 21 makes it possible to obtain a sole 20, represented by the figure 8 , after association with chassis 1, illustrated by the figures 1 and 2 .
  • the two rear 22 and front 32 parts can be formed by the same part, or by two different parts assembled together, for example by gluing.
  • the second component 21 integrates at least one longitudinal rib 24, to create a reinforced zone.
  • This rib extends at least partially in the front part 32, and preferably approximately over the entire length of this front part 32.
  • This rib has a width of between 5 to 15 mm, preferably 10 mm.
  • This rib is in relief by approximately 1 to 4 mm, but is always recessed from the lower surface of the side studs 5, this central part not coming into contact with the binding or the ski.
  • this same rib also extends continuously in the rear part 22 of the second component 21.
  • the rib 24 is preferably of a non-constant height, measured with respect to the flat surface of the insert , depending on the desired stiffness in this zone.
  • the anterior part of the rib could be of a greater height than the rear part of the rib, and vice versa.
  • the height of rib 24 could be constant over the entire length of the rib.
  • the second component 21 also incorporates a second rib 27 in its rear part 22, in particular visible on the figure 7 , with a height h measured relative to the flat surface of the second component 21, of between 1 and 5 mm, to increase the torsional stiffness in the central/rear part of the sole.
  • other configurations of ribs in the rear part 22 can be chosen without departing from the scope of the invention, in particular in terms of their number, their dimensions, and/or their orientations with respect to the axis longitudinal.
  • the figures 5 and 6 represent a second component 21 according to an alternative embodiment. It differs from the second component 21 described previously in that its front part 32 does not comprise a continuous rib but studs 25. These studs are aligned in the longitudinal direction and are here 5 in number, but their number could however be reduced.
  • the second component 21 makes it possible to obtain a sole 20, represented by the figure 9 , after its association with a chassis 1 as described above, in relation to the figures 1 and 2 .
  • the front part 32 carries studs 25, separated by transverse grooves 26. These studs have a lower surface reaching the same level as the studs of the chassis on the finished sole, this in order to come into contact with the plate of the binding and/or the ski.
  • This area of spikes 25 can extend over a length similar to that of the area covered by the spikes 5, or possibly over a shorter length.
  • the material used for the second component 21 is less rigid than the material used for the first component 1, thus improving the flexing of the sole 20, in particular in the front part and particularly in the area of the metatarsals.
  • the second component 21 and the first component 1 can be of equivalent rigidity (and/or hardness).
  • the rear part 22 of the second component 21, of wider width than the front part 32 can also include reinforcing ribs 24, 27 (visible on the figure 7 ) to increase the torsional rigidity of the sole.
  • a rib 24 can extend in the extension of the series of studs 25.
  • the sole according to this alternative embodiment is preferably intended for traditional or “classic” cross-country skiing.
  • This second component 21, for the two variant embodiments, can be manufactured by any means.
  • it can be manufactured by plastic injection in an embodiment in plastic material.
  • the studs 3, 5, 25 of the two components 1, 21 can be formed at the same time as the component which integrates them, thus forming a monolithic assembly with said component, or be formed separately by a separate step. . In the latter case, this has the advantage of being able to use a material other than that used for the two components described previously, in particular a very flexible material particularly suitable for absorbing shocks, encouraging walking and/or preventing slippage.
  • each component 1, 21 forms the base of the crampons, which is then covered with a flexible, rubber-like and/or non-slip material. It is also possible to use a polyurethane with a hardness of between 40 and 60 Shore D.
  • the manufacturing process can include an additional plastic injection step on the sole obtained by assembling the two components described, to form the coating of stud surface. Furthermore, the coating may extend beyond the surface of the studs to cover all or part of the insert and/or of the frame.
  • the figures 8 to 10 represent the finished sole 20, formed by assembling the two components 1, 21 described above. These two components can be manufactured separately and then assembled by any means, mechanical or not, such as bonding.
  • the second component 21, manufactured beforehand during a first injection into a first specific mold is then placed in a mold for manufacturing the sole, to form the chassis during a second injection into this second mold.
  • the chassis is then attached to the second component during this second injection to form the sole.
  • the second component forms an insert and the sole is obtained by overmolding the first component around and on this insert.
  • the second component forming the insert comprises several through holes 28 arranged on its periphery, in an area which will be covered on its two lower and upper surfaces by the injected material forming the frame, this adding a mechanical interlock of the two components with each other.
  • the frame 1 is molded over the insert (second component 21), and its material passes through the through holes 28 of the insert.
  • a reinforcing piece 40 to carry the connecting pin 4 with a binding, as shown in the figures 11 and 12 .
  • the use of this reinforcement piece guarantees good retention of the connecting pin 4 independently of the choice of materials for the frame or the second component.
  • the reinforcing part 40 has substantially a U or V shape.
  • This reinforcing part is manufactured by injection, independently of the injections making it possible to produce the components of the invention.
  • a rigid plastic material is injected imprisoning the connecting pin 4 at its two ends.
  • the material used can be a polyurethane with a hardness of between 50 and 70 Shore D.
  • the side branches of the pin can be embedded in the side parts 7 of the frame.
  • This reinforcing element 40 carrying the connecting pin 4 is then positioned in the mold for manufacturing the sole at the same time as the second component 21, then the material intended to form the first component 1 is injected into the mold to form the sole 20.
  • This reinforcing piece 40 allows thus to stiffen the sole in this part carrying the connecting pin 4 in order to resist the forces of connection with the ski binding.
  • the figures 8 to 10 therefore represent the sole obtained by assembling the two components 1, 21 described above.
  • the proposed architecture makes it possible to reach a compromise between flexibility and comfort, and the rigidity necessary for good skiing.
  • the materials are chosen to achieve the desired mechanical properties.
  • the rigidity in particular with respect to bending and/or torsion, is particularly considered, as described in detail above.
  • the hardness is the quantity considered to be representative of this rigidity and/or of the other mechanical properties mentioned, according to a common practice of those skilled in the art.
  • the front part 32 of the second component 21 makes it possible to adjust the optimum flexion of the sole.
  • this front part 32 extends forwards from substantially the center C of the sole.
  • it extends approximately up to the level of the connecting axis 4 located at the front end of the sole.
  • it extends over a length greater than or equal to a quarter, or even a third, of the total length of the sole. It extends between the two lateral parts 7 of the first component 1.
  • it extends between the two rows of front studs 5 on the sides of the sole.
  • it may extend only partially between the front lugs 5.
  • These lugs may have another configuration: their number may be reduced, in which case the most rearward lug is not necessarily arranged from the center C of the sole. Its width is constant or variable variant. It is advantageously of a width average between 10 and 25 mm, preferably close to 20 mm.
  • the studs 5, 25 of the sole 20 are all aligned in the transverse direction, as are the grooves 6, 26: this promotes and guides the correct flexing of the sole.
  • the rear part 22 of the second component 21 occupies a large surface, which extends over almost the entire width of the sole. It extends rearward from substantially the center C of the sole. Advantageously, it extends over at least a quarter of the total length of the sole. It plays in particular the role of a torsion reinforcement.
  • the border between the rear part 22 and the front part 32 of the second component 21 is substantially positioned at the level of the center C of the sole 20. As a variant, this border can be slightly forward or backward.
  • the second component 21 comprises a front part 32 extending substantially longitudinally in the front part of the sole 20.
  • the sole obtained by the combination of the two components according to the invention has high rigidity properties, for the practice of skating, in torsion and in flexion, which makes it possible to provide a maximum transfer of energy from the foot to the skiing during propulsion.
  • the sole obtained for classic practice has torsional rigidity properties, which remain high and similar to the sole intended for the practice of skating, but is more flexible in flexion on the front of the foot, in order to facilitate the movement of going. and comes towards the back, thus allowing a good rolling of the foot and a good impulse.
  • the approach adopted according to the invention makes it possible to adapt the architecture of the sole by simply modifying the second component 21, the chassis remaining unchanged.
  • the same mold for manufacturing the sole, and more specifically the frame is used in all cases, only the insert mold being slightly modified.
  • the invention also relates to a sports shoe, in particular for cross-country skiing, comprising a sole as described previously. It also relates to a series of shoes, comprising at least two soles differing only in the second component, their first component being identical, at least in terms of their shape, and preferably of identical shape and material. As has been described, the invention is particularly suitable for use for a cross-country ski sole. However, nothing prevents you from using it for another sport.
  • the invention also relates to a method for manufacturing a shoe sole and more generally a sports shoe, which comprises the steps described above.
  • the sole can comprise more than two components, as has been seen according to the last variant embodiment.
  • the heel can also be formed by a separate component.
  • the chassis and/or the second component can be formed by assembling several parts, or be monolithic as described above.
  • the fixing of the second component on the frame can be removable, or non-removable, as described above by the overmolding process.
  • a second removable component it is possible to easily modify the properties of the sole of a sports shoe by simply changing the second component, in particular to go from a cross-country ski boot suitable for classic practice to practice in skating and vice versa.
  • the entire sole can be removable, to allow soles with different properties to be mounted on the same shoe upper.
  • the solution according to the invention therefore has the following advantages: it makes it possible to manufacture a lightweight sole, at lower cost, which combines properties of comfort and rigidity, in particular resistance to bending and torsion. It therefore achieves the desired objects.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Description

L'invention concerne une semelle de chaussure de sport, selon la revendication indépendante 1, et une série de chaussures de ski de fond intégrant une telle semelle, selon la revendication indépendante 15. Elle concerne aussi un procédé de fabrication d'une telle semelle, selon la revendication indépendante 16.The invention relates to a sports shoe sole, according to independent claim 1, and to a series of cross-country ski boots incorporating such a sole, according to independent claim 15. It also relates to a method of manufacturing such a sole, according to independent claim 16.

Une chaussure de ski de fond, voire de randonnée, permet une rotation de la chaussure autour d'un axe situé vers l'avant de la chaussure. Pour cela, elle est dotée d'une semelle qui comprend une rigidité et une résistance importantes, pour supporter de manière fiable une fixation avec le ski de fond et participer à une bonne transmission des efforts pendant la pratique du ski de fond. Notamment, cette semelle doit permettre :

  • un déroulement maximum du pied vers l'avant, pour offrir une grande amplitude de foulée dans la pratique dite "traditionnelle" ou "classique" du ski de fond, caractérisée par une articulation metatarsophalangienne marquée ; et
  • un contrôle optimal du ski dans la pratique du pas alternatif ou de patineur, aussi appelée "skating" par sa dénomination anglo-saxonne, qui exige un contact maximum du pied sur le ski, pour un bon contrôle de ce dernier.
A cross-country ski boot, or even a hiking boot, allows the boot to rotate around an axis located towards the front of the boot. For this, it is equipped with a sole that includes significant rigidity and resistance, to reliably support a binding with the cross-country ski and participate in a good transmission of forces during the practice of cross-country skiing. In particular, this sole must allow:
  • maximum rolling of the foot forward, to provide a large stride amplitude in the so-called "traditional" or "classic" practice of cross-country skiing, characterized by a marked metatarsophalangeal joint; and
  • optimal control of the ski in the practice of the alternative step or skater, also called "skating" by its Anglo-Saxon name, which requires maximum contact of the foot on the ski, for a good control of the latter.

En complément, une telle chaussure de ski de fond se doit de présenter un poids minimal pour favoriser la performance. Enfin, elle doit garantir un niveau de confort satisfaisant au skieur, notamment pour les phases hors de la pratique du ski, comme la marche. Face à ces exigences contradictoires, les solutions existantes restent insatisfaisantes.In addition, such a cross-country ski boot must have a minimum weight to promote performance. Finally, it must guarantee a satisfactory level of comfort to the skier, in particular for the phases outside the practice of skiing, such as walking. Faced with these contradictory requirements, the existing solutions remain unsatisfactory.

A titre d'exemple, le document WO2013058658 répond à ces exigences en décrivant une semelle complexe formée par l'assemblage de plusieurs composants aux propriétés complémentaires, notamment un renfort amovible en partie centrale de la semelle. Cette solution reste toutefois coûteuse et non optimale.For example, the document WO2013058658 meets these requirements by describing a complex sole formed by the assembly of several components with complementary properties, in particular a removable reinforcement in the central part of the sole. However, this solution remains expensive and not optimal.

EP 1 803 362 A1 divulgue une semelle selon le préambule de la revendication 1. EP 1 803 362 A1 discloses a sole according to the preamble of claim 1.

Ainsi, un premier objet de la présente invention consiste à proposer une semelle de chaussure qui permet d'atteindre une rigidité suffisante, notamment une résistance à la flexion et/ou à la torsion, pour une utilisation pour la pratique du ski de fond.Thus, a first object of the present invention consists in proposing a shoe sole which makes it possible to achieve sufficient rigidity, in particular resistance to bending and/or torsion, for use for cross-country skiing.

Un second objet de la présente invention consiste à proposer une semelle de chaussure présentant un poids minimal.A second object of the present invention is to provide a shoe sole having a minimum weight.

Un troisième objet de la présente invention consiste à proposer une semelle de chaussure qui permet d'atteindre un confort satisfaisant.A third object of the present invention consists in proposing a shoe sole which makes it possible to achieve satisfactory comfort.

Un quatrième objet de la présente invention consiste à proposer une semelle de chaussure qui peut être fabriquée à un coût raisonnable.A fourth object of the present invention is to provide a shoe sole which can be manufactured at reasonable cost.

Selon le concept de l'invention, la semelle de chaussure comprend un premier composant formant un châssis et au moins un second composant assemblé au premier composant, caractérisée en ce que le second composant comprend une partie antérieure s'étendant sensiblement longitudinalement en partie antérieure de la semelle.According to the concept of the invention, the shoe sole comprises a first component forming a chassis and at least one second component assembled to the first component, characterized in that the second component comprises a front part extending substantially longitudinally in the front part of the sole.

L'invention est plus précisément définie par les revendications dépendantes suivantes.The invention is further defined by the following dependent claims.

Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante d'un mode d'exécution particulier illustré sur une chaussure de ski de fond à titre non-limitatif en relation avec les figures jointes parmi lesquelles :

  • Les figures 1 et 2 représentent respectivement une vue en perspective de dessous et une vue de dessous d'un premier composant formant un châssis d'une semelle selon un mode de réalisation de l'invention.
  • Les figures 3 et 4 représentent respectivement une vue en perspective de dessous et une vue de dessous d'un second composant formant un insert de la semelle selon le mode de réalisation de l'invention.
  • Les figures 5 et 6 représentent respectivement une vue en perspective de dessous et une vue de dessous d'un second composant formant un insert de la semelle selon une variante du mode de réalisation de l'invention.
  • La figure 7 représente une vue en coupe de la partie arrière du second composant formant un insert selon les variantes du mode de réalisation de l'invention.
  • La figure 8 représente une vue en perspective de dessous de la semelle selon le mode de réalisation de l'invention.
  • La figure 9 représente une vue en perspective de dessous de la semelle selon la variante du mode de réalisation de l'invention.
  • La figure 10 représente une vue de face de l'avant de la semelle selon le mode de réalisation de l'invention.
  • Les figures 11 et 12 représentent respectivement une vue en perspective de dessus et une vue de dessus d'un troisième composant formant une pièce de renfort d'une semelle pour porter l'axe de liaison avec une fixation selon une variante du mode de réalisation de l'invention.
These objects, characteristics and advantages of the present invention will be explained in detail in the following description of a particular embodiment illustrated on a cross-country ski boot on a non-limiting basis in relation to the attached figures, among which:
  • The figures 1 and 2 represent respectively a bottom perspective view and a bottom view of a first component forming a frame of a sole according to one embodiment of the invention.
  • The figures 3 and 4 represent respectively a bottom perspective view and a bottom view of a second component forming an insert of the sole according to the embodiment of the invention.
  • The figures 5 and 6 represent respectively a bottom perspective view and a bottom view of a second component forming an insert of the sole according to a variant of the embodiment of the invention.
  • The figure 7 shows a sectional view of the rear part of the second component forming an insert according to the variants of the embodiment of the invention.
  • The figure 8 shows a perspective view from below of the sole according to the embodiment of the invention.
  • The figure 9 shows a perspective view from below of the sole according to the variant of the embodiment of the invention.
  • The figure 10 shows a front view of the front of the sole according to the embodiment of the invention.
  • The figures 11 and 12 represent respectively a top perspective view and a top view of a third component forming a reinforcing part of a sole to carry the connecting pin with a binding according to a variant of the embodiment of the invention.

Dans la description suivante, la direction verticale désigne la direction de bas en haut, c'est-à-dire de la semelle de la chaussure vers le haut de la chaussure. Ainsi, le terme « dessous de la semelle » désignera la surface inférieure de la semelle, visible depuis l'extérieur de la chaussure et destinée à venir en contact sur le sol ou un ski, le terme « dessus de la semelle » désignant inversement la surface supérieure de la semelle, orientée vers l'intérieure de la chaussure. La direction longitudinale désigne la direction perpendiculaire à la direction verticale, orientée de l'arrière vers l'avant de la chaussure (et de la semelle). La direction transversale est la direction perpendiculaire à la direction longitudinale dans le plan de la semelle. Les deux directions longitudinale et transversale définissent un plan horizontal, dans lequel se trouve sensiblement posée la semelle d'une chaussure à l'arrêt.In the following description, the vertical direction designates the direction from bottom to top, that is to say from the sole of the shoe to the top of the shoe. Thus, the term "underside of the sole" will designate the lower surface of the sole, visible from the outside of the shoe and intended to come into contact with the ground or a ski, the term "overhead of the sole" conversely designating the upper surface of the sole, oriented towards the inside of the shoe. The longitudinal direction designates the direction perpendicular to the vertical direction, oriented from the back to the front of the shoe (and of the sole). The transverse direction is the direction perpendicular to the longitudinal direction in the plane of the sole. The two longitudinal and transverse directions define a horizontal plane, in which the sole of a stationary shoe is substantially placed.

Dans les différents modes de réalisation, les mêmes références sont utilisées pour désigner les mêmes caractéristiques ou des caractéristiques similaires.In the different embodiments, the same references are used to designate the same or similar characteristics.

Les figures 8 et 9 illustrent des vues en perspective de dessous d'une semelle 20 de chaussure de ski de fond selon un mode de réalisation de l'invention. Selon ce mode de réalisation, la semelle est composée de deux composants principaux distincts, assemblés. Les figures 1 et 2 illustrent le premier composant 1, formant un châssis de la semelle. Les figures 3 à 7 illustrent le second composant 21 de la semelle.The figure 8 and 9 illustrate perspective views from below of a cross-country ski boot sole 20 according to one embodiment of the invention. According to this embodiment, the sole is composed of two separate main components, assembled. The figures 1 and 2 illustrate the first component 1, forming a frame of the sole. The figures 3 to 7 illustrate the second component 21 of the sole.

Les figures 1 et 2 illustrent ainsi un premier composant 1 formant un châssis d'une semelle 20 selon le mode de réalisation. Ce châssis forme l'ensemble de la semelle 20, à l'exception d'ouvertures 2, 12 en partie centrale destinées à recevoir le second composant 21, comme cela sera explicité par la suite. Ce châssis 1 s'étend sur toute la longueur de la semelle 20. Il forme notamment tout le contour de la semelle 20. Ainsi, il forme le talon de la semelle 20, comprenant quelques crampons 3 selon une géométrie conventionnelle. Il comprend ensuite une partie antérieure formant un support pour une barre ou axe de liaison 4 orienté transversalement et permettant la liaison avec une fixation, tel que standardisé. Ensuite, à l'arrière de cet axe 4, la partie antérieure du châssis comprend deux parties latérales 7 délimitées par une ouverture centrale longitudinale 12, qui se prolonge vers l'ouverture centrale/arriére 2, plus large située plus en arrière, approximativement dans la partie arrière de la semelle. Ces deux parties latérales 7 comprennent chacune une succession de crampons antérieurs 5, sensiblement alignés dans la direction longitudinale, et délimités par des rainures 6. Les crampons antérieurs 5 et rainures transversales 6 des deux parties latérales sont alignés de part et d'autre de l'ouverture centrale longitudinale 12. En particulier, l'ouverture centrale/arrière 2 est positionnée entre les crampons arrière 3 et les crampons avant 5.The figures 1 and 2 thus illustrate a first component 1 forming a frame of a sole 20 according to the embodiment. This frame forms the whole of the sole 20, with the exception of openings 2, 12 in part central intended to receive the second component 21, as will be explained later. This frame 1 extends over the entire length of the sole 20. In particular, it forms the entire outline of the sole 20. Thus, it forms the heel of the sole 20, comprising a few studs 3 according to a conventional geometry. It then comprises a front part forming a support for a bar or connecting pin 4 oriented transversely and allowing the connection with a binding, as standardized. Then, at the rear of this axis 4, the front part of the frame comprises two lateral parts 7 delimited by a central longitudinal opening 12, which extends towards the central/rear opening 2, which is wider and located further back, approximately in the rear part of the sole. These two side parts 7 each comprise a succession of front studs 5, substantially aligned in the longitudinal direction, and delimited by grooves 6. The front studs 5 and transverse grooves 6 of the two side parts are aligned on either side of the longitudinal central opening 12. In particular, the central/rear opening 2 is positioned between the rear studs 3 and the front studs 5.

Le châssis est avantageusement formé dans un matériau plastique, comme par exemple un polyuréthane, ou du Pebax® (polyéther bloc amide) de dureté comprise entre 50 et 70 Shore D. Il est de préférence constitué par un matériau unique pour réduire les coûts mais on ne sortira pas du cadre de l'invention s'il est composé de plusieurs matériaux. En particulier, la zone du talon pourrait être réalisée dans un autre matériau par exemple. Il est avantageusement fabriqué par une étape d'injection. Il permet de garantir le confort d'utilisation de la chaussure et participe aux propriétés mécaniques de la semelle en flexion, torsion et flexion latérale. Par ailleurs, ce châssis peut comporter deux nervures longitudinales 8 formant renfort, s'étendant de part et d'autre de l'ouverture centrale/arrière 2, permettant principalement de rigidifier la semelle en torsion.The chassis is advantageously formed in a plastic material, such as for example a polyurethane, or Pebax ® (polyether block amide) with a hardness of between 50 and 70 Shore D. It is preferably made of a single material to reduce costs but it is will not depart from the scope of the invention if it is composed of several materials. In particular, the heel area could be made of another material, for example. It is advantageously manufactured by an injection step. It guarantees the comfort of use of the shoe and contributes to the mechanical properties of the sole in flexion, torsion and lateral flexion. Furthermore, this frame may comprise two longitudinal ribs 8 forming a reinforcement, extending on either side of the central/rear opening 2, mainly making it possible to stiffen the sole in torsion.

Les figures 3 à 7 illustrent un second composant 21 de la semelle 20, destiné à un assemblage avec le premier composant 1 décrit ci-dessus, notamment au niveau de ses ouvertures 2, 12. Ce second composant 21 a pour fonction d'apporter la rigidité/souplesse nécessaire pour l'ensemble de la semelle, pour atteindre une bonne performance lors de la pratique du ski. Pour cela, il se présente de préférence dans un matériau différent de celui du châssis. Il est de préférence dans un matériau plus rigide dans le cadre d'une pratique "skating", limitant ainsi la flexion de la semelle 20, notamment dans la partie antérieure. Pour la pratique dite "classique", il est de préférence dans un matériau plus souple ou de rigidité similaire à celui du châssis pour créer une zone de flexion dans la partie antérieure de la semelle principalement dans la zone des métatarses. Par exemple, le second composant 21 peut être en un matériau plastique, comme un polyuréthane ou du Pebax® (polyéther bloc amide) de dureté comprise entre 50 et 70 Shore D. En variante, il peut être dans un matériau plastique chargé en fibres ou en matériau composite. En variante, il peut être tout ou partie en métal. Le second composant 21 est de préférence formé intégralement dans un même matériau, par souci de simplicité, mais peut en variante comprendre plusieurs matériaux, et atteindre des propriétés de rigidité/souplesse telles que recherchées.The figures 3 to 7 illustrate a second component 21 of the sole 20, intended for assembly with the first component 1 described above, in particular at its openings 2, 12. This second component 21 has the function of providing the rigidity/flexibility necessary for the entire sole, to achieve good performance when skiing. For this, it is preferably in a different material from that of the frame. It is preferably made of a more rigid material in the context of a "skating" practice, thus limiting the bending of the sole 20, in particular in the front part. For the so-called "classic" practice, it is preferably in a more flexible material or of similar rigidity to that of the frame to create a zone of flexion in the front part of the sole, mainly in the area of the metatarsals. For example, the second component 21 can be made of a plastic material, such as a polyurethane or Pebax® (polyether block amide) with a hardness of between 50 and 70 Shore D. As a variant, it can be made of a plastic material filled with fibers or in composite material. Alternatively, it may be all or part of metal. The second component 21 is preferably formed entirely from the same material, for the sake of simplicity, but may as a variant comprise several materials, and achieve rigidity/flexibility properties as sought.

Les figures 3 et 4 illustrent le second composant 21 du premier mode de réalisation qui correspond à un composant adapté plus particulièrement pour la pratique du skating.The figures 3 and 4 illustrate the second component 21 of the first embodiment which corresponds to a component adapted more particularly for the practice of skating.

Ce second composant 21 comprend une partie arrière 22 de surface importante, se présentant comme une plaque de renfort, destinée à occuper l'ouverture sensiblement centrale 2 et/ou arrière de la semelle. Dans cette zone, le second composant 21 rigide est destiné à occuper une surface importante de la surface de la semelle 20 finie, s'étendant sur plus de la moitié de la largeur de la semelle, pour remplir une fonction de résistance à la torsion de la semelle.This second component 21 comprises a rear part 22 of large surface area, presented as a reinforcement plate, intended to occupy the substantially central opening 2 and/or rear of the sole. In this zone, the second rigid component 21 is intended to occupy a large area of the surface of the finished sole 20, extending over more than half the width of the sole, to fulfill a function of resistance to torsion of the sole.

Ensuite, il comprend une partie antérieure 32 de faible largeur, qui s'étend dans la direction longitudinale, destinée à occuper l'ouverture centrale longitudinale 12 du châssis 1 entre les crampons latéraux 5 du châssis. Cette partie antérieure 32 se comporte comme une poutre de renfort central en partie avant de la semelle 20, où elle remplit plus particulièrement une fonction de résistance à la flexion. Naturellement, cette partie antérieure 32 du second composant 21 de la semelle 20 peut présenter d'autres formes (en vue de dessus) que celle représentée, comprenant notamment tout ou partie des caractéristiques suivantes :

  • une forme globalement allongée, de largeur moyenne constante ou plus étroite vers l'avant que vers l'arrière ;
  • une forme rectangulaire ou triangulaire ;
  • une forme avec des côtés rectilignes ou courbes, parallèles ou non.
Then, it comprises a front part 32 of small width, which extends in the longitudinal direction, intended to occupy the central longitudinal opening 12 of the frame 1 between the side studs 5 of the frame. This front part 32 behaves like a central reinforcing beam in the front part of the sole 20, where it fulfills more particularly a bending resistance function. Naturally, this anterior part 32 of the second component 21 of the sole 20 may have other shapes (in top view) than that shown, comprising in particular all or part of the following characteristics:
  • a generally elongated shape, of constant average width or narrower towards the front than towards the rear;
  • a rectangular or triangular shape;
  • a shape with straight or curved sides, parallel or not.

Ce second composant 21 permet d'obtenir une semelle 20, représentée par la figure 8, après association avec le châssis 1, illustré par les figures 1 et 2.This second component 21 makes it possible to obtain a sole 20, represented by the figure 8 , after association with chassis 1, illustrated by the figures 1 and 2 .

Les deux parties arrière 22 et antérieure 32 peuvent être formées par la même pièce, ou par deux pièces différentes assemblées entre elles, par exemple par collage.The two rear 22 and front 32 parts can be formed by the same part, or by two different parts assembled together, for example by gluing.

Selon le mode de réalisation, le second composant 21 intègre au moins une nervure longitudinale 24, pour créer une zone renforcée. Cette nervure s'étend au moins partiellement dans la partie antérieure 32, et de préférence approximativement sur toute la longueur de cette partie antérieure 32. Cette nervure est d'une largeur comprise entre 5 à 15 mm, de préférence 10 mm. Cette nervure est en relief de 1 à 4 mm environ, mais est toujours en retrait de la surface inférieure des crampons latéraux 5, cette partie centrale ne venant pas au contact de la fixation ou du ski. Selon la variante de réalisation, cette même nervure s'étend aussi de manière continue dans la partie arrière 22 du second composant 21. La nervure 24 est de préférence d'une hauteur non constante, mesurée par rapport à la surface plane de l'insert, suivant la rigidité recherchée dans cette zone. Par exemple, la partie antérieure de la nervure pourrait être d'une hauteur supérieure à la partie arrière de la nervure, et inversement. Par exemple, une hauteur de 1 à 2 mm dans la partie arrière, et jusqu'à 3 à 4 mm dans la partie antérieure de cette nervure. Dans une variante, la hauteur de la nervure 24 pourrait être constante sur toute la longueur de la nervure. Le second composant 21 intègre de plus une seconde nervure 27 dans sa partie arrière 22, notamment visible sur la figure 7, d'une hauteur h mesurée par rapport à la surface plane de du second composant 21, comprise entre 1 à 5 mm, pour augmenter la raideur en torsion dans la partie centrale/arrière de la semelle. Bien entendu, d'autres configurations de nervures dans la partie arrière 22 peuvent être choisies sans sortir du cadre de l'invention, en particulier au niveau de leur nombre, de leurs dimensions, et/ou de leurs orientations par rapport à l'axe longitudinal.According to the embodiment, the second component 21 integrates at least one longitudinal rib 24, to create a reinforced zone. This rib extends at least partially in the front part 32, and preferably approximately over the entire length of this front part 32. This rib has a width of between 5 to 15 mm, preferably 10 mm. This rib is in relief by approximately 1 to 4 mm, but is always recessed from the lower surface of the side studs 5, this central part not coming into contact with the binding or the ski. According to the variant embodiment, this same rib also extends continuously in the rear part 22 of the second component 21. The rib 24 is preferably of a non-constant height, measured with respect to the flat surface of the insert , depending on the desired stiffness in this zone. For example, the anterior part of the rib could be of a greater height than the rear part of the rib, and vice versa. For example, a height of 1 to 2 mm in the rear part, and up to 3 to 4 mm in the anterior part of this rib. Alternatively, the height of rib 24 could be constant over the entire length of the rib. The second component 21 also incorporates a second rib 27 in its rear part 22, in particular visible on the figure 7 , with a height h measured relative to the flat surface of the second component 21, of between 1 and 5 mm, to increase the torsional stiffness in the central/rear part of the sole. Of course, other configurations of ribs in the rear part 22 can be chosen without departing from the scope of the invention, in particular in terms of their number, their dimensions, and/or their orientations with respect to the axis longitudinal.

Les figures 5 et 6 représentent un second composant 21 selon une variante de réalisation. Il diffère du second composant 21 décrit précédemment en ce que sa partie antérieure 32 ne comprend pas de nervure continue mais des crampons 25. Ces crampons sont alignés dans la direction longitudinale et sont ici au nombre de 5, mais leur nombre pourrait cependant être réduit. Le second composant 21 permet d'obtenir une semelle 20, représentée par la figure 9, après son association avec un châssis 1 tel que décrit précédemment, en relation avec les figures 1 et 2. Selon cette variante, la partie antérieure 32 porte des crampons 25, séparés par des rainures transversales 26. Ces crampons ont une surface inférieure atteignant le même niveau que les crampons du châssis sur la semelle finie, ceci dans le but de venir en contact avec la plaque de la fixation et/ou le ski. Cette zone de crampons 25 peut s'étendre sur une longueur similaire à celle de la zone couverte par les crampons 5, ou éventuellement sur une longueur plus restreinte. Selon cette variante, le matériau utilisé pour le second composant 21 est moins rigide que le matériau utilisé pour le premier composant 1, améliorant ainsi la flexion de la semelle 20, notamment dans la partie antérieure et particulièrement dans la zone des métatarses. Dans une autre variante, le second composant 21 et le premier composant 1 peuvent être de rigidité (et/ou dureté) équivalente. De même que dans le premier mode de réalisation, la partie arrière 22 du second composant 21, de largeur plus large que la partie antérieure 32, peut également comporter des nervures de renfort 24, 27, (visibles sur la figure 7) pour augmenter la rigidité en torsion de la semelle. En particulier, une nervure 24 peut s'étendre dans le prolongement de la série de crampons 25.The figures 5 and 6 represent a second component 21 according to an alternative embodiment. It differs from the second component 21 described previously in that its front part 32 does not comprise a continuous rib but studs 25. These studs are aligned in the longitudinal direction and are here 5 in number, but their number could however be reduced. The second component 21 makes it possible to obtain a sole 20, represented by the figure 9 , after its association with a chassis 1 as described above, in relation to the figures 1 and 2 . According to this variant, the front part 32 carries studs 25, separated by transverse grooves 26. These studs have a lower surface reaching the same level as the studs of the chassis on the finished sole, this in order to come into contact with the plate of the binding and/or the ski. This area of spikes 25 can extend over a length similar to that of the area covered by the spikes 5, or possibly over a shorter length. According to this variant, the material used for the second component 21 is less rigid than the material used for the first component 1, thus improving the flexing of the sole 20, in particular in the front part and particularly in the area of the metatarsals. In another variant, the second component 21 and the first component 1 can be of equivalent rigidity (and/or hardness). As in the first embodiment, the rear part 22 of the second component 21, of wider width than the front part 32, can also include reinforcing ribs 24, 27 (visible on the figure 7 ) to increase the torsional rigidity of the sole. In particular, a rib 24 can extend in the extension of the series of studs 25.

La semelle selon cette variante de réalisation est destinée de préférence à une pratique du ski de fond traditionnelle ou "classique".The sole according to this alternative embodiment is preferably intended for traditional or “classic” cross-country skiing.

Ce second composant 21, pour les deux variantes de réalisation, peut être fabriqué par tout moyen. Par exemple, il peut être fabriqué par injection plastique dans un mode de réalisation en matériau plastique.This second component 21, for the two variant embodiments, can be manufactured by any means. For example, it can be manufactured by plastic injection in an embodiment in plastic material.

Dans tous les cas, les crampons 3, 5, 25 des deux composants 1, 21 peuvent être formés en même temps que le composant qui les intègre, formant ainsi un ensemble monolithique avec ledit composant, ou être formés de manière distincte par une étape séparée. Dans ce dernier cas, cela présente l'avantage de pouvoir utiliser un autre matériau que celui utilisé pour les deux composants décrits précédemment, notamment un matériau très souple particulièrement adapté pour amortir les chocs, favoriser la marche et/ou éviter les glissements. Dans le mode de réalisation préféré, chaque composant 1, 21 forme la base des crampons, qui est ensuite recouverte d'un matériau souple, de type caoutchouc et/ou antidérapant. On peut également utiliser un polyuréthane de dureté comprise entre 40 et 60 Shore D. Pour cela, le procédé de fabrication peut comprendre une étape d'injection plastique supplémentaire sur la semelle obtenue par l'assemblage des deux composants décrits, pour former le revêtement de surface des crampons. Par ailleurs, le revêtement peut s'étendre au-delà de la surface des crampons pour recouvrir tout ou partie de l'insert et/ou du châssis.In all cases, the studs 3, 5, 25 of the two components 1, 21 can be formed at the same time as the component which integrates them, thus forming a monolithic assembly with said component, or be formed separately by a separate step. . In the latter case, this has the advantage of being able to use a material other than that used for the two components described previously, in particular a very flexible material particularly suitable for absorbing shocks, encouraging walking and/or preventing slippage. In the preferred embodiment, each component 1, 21 forms the base of the crampons, which is then covered with a flexible, rubber-like and/or non-slip material. It is also possible to use a polyurethane with a hardness of between 40 and 60 Shore D. For this, the manufacturing process can include an additional plastic injection step on the sole obtained by assembling the two components described, to form the coating of stud surface. Furthermore, the coating may extend beyond the surface of the studs to cover all or part of the insert and/or of the frame.

Les figures 8 à 10 représentent la semelle 20 terminée, formée par l'assemblage des deux composants 1, 21 décrits ci-dessus. Ces deux composants peuvent être fabriqués séparément puis assemblés par tout moyen, mécanique ou non, comme un collage. Selon un mode de réalisation préféré, le second composant 21, fabriqué au préalable lors d'une première injection dans un premier moule spécifique, est ensuite disposé dans un moule de fabrication de la semelle, pour former le châssis lors d'une deuxième injection dans ce deuxième moule. Le châssis est alors solidarisé au second composant lors de cette deuxième injection pour former la semelle. Avec cette approche, le second composant forme un insert et la semelle est obtenue par surmoulage du premier composant autour et sur cet insert. Ce mode de réalisation de fabrication de la semelle garantit la bonne fixation des deux composants l'un avec l'autre, tout en représentant un procédé peu coûteux puisqu'il ne nécessite pas une étape séparée de fixation des deux composants. Pour augmenter la bonne fixation respective des deux composants ensemble, le second composant formant l'insert comprend plusieurs trous traversants 28 agencés sur son pourtour, dans une zone qui sera recouverte sur ses deux surfaces inférieure et supérieure par le matériau injecté formant le châssis, ceci ajoutant un accrochage mécanique des deux composants l'un avec l'autre. Dans cette zone périphérique, le châssis 1 est surmoulé sur l'insert (second composant 21), et son matériau traverse les trous traversants 28 de l'insert.The figures 8 to 10 represent the finished sole 20, formed by assembling the two components 1, 21 described above. These two components can be manufactured separately and then assembled by any means, mechanical or not, such as bonding. According to a preferred embodiment, the second component 21, manufactured beforehand during a first injection into a first specific mold, is then placed in a mold for manufacturing the sole, to form the chassis during a second injection into this second mold. The chassis is then attached to the second component during this second injection to form the sole. With this approach, the second component forms an insert and the sole is obtained by overmolding the first component around and on this insert. This embodiment of manufacture of the sole guarantees the correct fixing of the two components with each other, while representing an inexpensive process since it does not require a separate step of fixing the two components. To increase the respective good fixing of the two components together, the second component forming the insert comprises several through holes 28 arranged on its periphery, in an area which will be covered on its two lower and upper surfaces by the injected material forming the frame, this adding a mechanical interlock of the two components with each other. In this peripheral zone, the frame 1 is molded over the insert (second component 21), and its material passes through the through holes 28 of the insert.

Par ailleurs, dans la partie avant de la semelle, il est connu d'utiliser une pièce de renfort 40 pour porter l'axe de liaison 4 avec une fixation, comme représenté sur les figures 11 et 12. L'utilisation de cette pièce de renfort garantit un bon maintien de l'axe de liaison 4 indépendamment du choix des matériaux pour le châssis ou le second composant. La pièce de renfort 40 a sensiblement une forme en U ou V. Cette pièce de renfort est fabriquée par injection, indépendamment des injections permettant de réaliser les composants de l'invention. Pour cela, on injecte un matériau plastique rigide emprisonnant l'axe de liaison 4 au niveau de ses deux extrémités. Le matériau utilisé peut être un polyuréthane de dureté comprise entre 50 et 70 Shore D. Dans le cas où l'axe de liaison 4 est également en forme de U, les branches latérales de l'axe peuvent être noyées dans les parties latérales 7 du châssis. Cet élément de renfort 40 portant l'axe de liaison 4 est positionné ensuite dans le moule de fabrication de la semelle en même temps que le second composant 21, puis la matière destinée à former le premier composant 1 est injectée dans le moule pour former la semelle 20. Cette pièce de renfort 40 permet ainsi de rigidifier la semelle dans cette partie portant l'axe de liaison 4 afin de résister aux efforts de liaison avec la fixation de ski.Furthermore, in the front part of the sole, it is known to use a reinforcing piece 40 to carry the connecting pin 4 with a binding, as shown in the figures 11 and 12 . The use of this reinforcement piece guarantees good retention of the connecting pin 4 independently of the choice of materials for the frame or the second component. The reinforcing part 40 has substantially a U or V shape. This reinforcing part is manufactured by injection, independently of the injections making it possible to produce the components of the invention. For this, a rigid plastic material is injected imprisoning the connecting pin 4 at its two ends. The material used can be a polyurethane with a hardness of between 50 and 70 Shore D. In the case where the connecting pin 4 is also U-shaped, the side branches of the pin can be embedded in the side parts 7 of the frame. This reinforcing element 40 carrying the connecting pin 4 is then positioned in the mold for manufacturing the sole at the same time as the second component 21, then the material intended to form the first component 1 is injected into the mold to form the sole 20. This reinforcing piece 40 allows thus to stiffen the sole in this part carrying the connecting pin 4 in order to resist the forces of connection with the ski binding.

Les figures 8 à 10 représentent donc la semelle obtenue par l'assemblage des deux composants 1, 21 décrits précédemment. L'architecture proposée permet d'atteindre un compromis entre la souplesse et le confort, et la rigidité nécessaire pour la bonne pratique du ski. Comme explicité par les exemples précédemment, les matériaux sont choisis pour atteindre les propriétés mécaniques souhaitées. En remarque, la rigidité, notamment vis-à-vis de la flexion et/ou de la torsion, est particulièrement considérée, comme décrit en détail ci-dessus. Dans le cas des matériaux plastiques, la dureté est la grandeur considérée représentative de cette rigidité et/ou des autres propriétés mécaniques mentionnées, selon une pratique courante de l'homme du métier.The figures 8 to 10 therefore represent the sole obtained by assembling the two components 1, 21 described above. The proposed architecture makes it possible to reach a compromise between flexibility and comfort, and the rigidity necessary for good skiing. As explained by the examples above, the materials are chosen to achieve the desired mechanical properties. As a side note, the rigidity, in particular with respect to bending and/or torsion, is particularly considered, as described in detail above. In the case of plastic materials, the hardness is the quantity considered to be representative of this rigidity and/or of the other mechanical properties mentioned, according to a common practice of those skilled in the art.

Notamment, la partie antérieure 32 du second composant 21 permet d'ajuster la flexion optimale de la semelle. Pour cela, cette partie antérieure 32 s'étend vers l'avant depuis sensiblement le centre C de la semelle. Avantageusement, elle s'étend approximativement jusqu'au niveau de l'axe de liaison 4 situé à l'extrémité avant de la semelle. Avantageusement, elle s'étend sur une longueur supérieure ou égale au quart, voire au tiers, de la longueur totale de la semelle. Elle s'étend entre les deux parties latérales 7 du premier composant 1. Ainsi, elle s'étend entre les deux rangées de crampons antérieurs 5 latéraux de la semelle. En variante, elle peut ne s'étendre que partiellement entre les crampons antérieurs 5. Ces crampons peuvent présenter une autre configuration : leur nombre peut être diminué, auquel cas le crampon le plus reculé n'est pas nécessairement disposé dès le centre C de la semelle. Sa largeur est constante ou en variante variable. Elle est avantageusement d'une largeur moyenne comprise entre 10 et 25 mm, préférentiellement proche de 20 mm.In particular, the front part 32 of the second component 21 makes it possible to adjust the optimum flexion of the sole. For this, this front part 32 extends forwards from substantially the center C of the sole. Advantageously, it extends approximately up to the level of the connecting axis 4 located at the front end of the sole. Advantageously, it extends over a length greater than or equal to a quarter, or even a third, of the total length of the sole. It extends between the two lateral parts 7 of the first component 1. Thus, it extends between the two rows of front studs 5 on the sides of the sole. As a variant, it may extend only partially between the front lugs 5. These lugs may have another configuration: their number may be reduced, in which case the most rearward lug is not necessarily arranged from the center C of the sole. Its width is constant or variable variant. It is advantageously of a width average between 10 and 25 mm, preferably close to 20 mm.

Les crampons 5, 25 de la semelle 20 sont tous alignés dans la direction transversale, de même que les rainures 6, 26 : cela favorise et guide la bonne flexion de la semelle.The studs 5, 25 of the sole 20 are all aligned in the transverse direction, as are the grooves 6, 26: this promotes and guides the correct flexing of the sole.

La partie arrière 22 du second composant 21 occupe une surface importante, qui s'étend sur presque toute la largeur de la semelle. Elle s'étend vers l'arrière depuis sensiblement le centre C de la semelle. Avantageusement, elle s'étend sur au moins un quart de la longueur totale de la semelle. Elle joue en particulier le rôle d'un renfort en torsion. Ainsi, la frontière entre la partie arrière 22 et la partie antérieure 32 du second composant 21 est sensiblement positionnée au niveau du centre C de la semelle 20. En variante, cette frontière peut être légèrement avancée ou reculée. Dans tous les cas, le second composant 21 comprend une partie antérieure 32 s'étendant sensiblement longitudinalement en partie antérieure de la semelle 20.The rear part 22 of the second component 21 occupies a large surface, which extends over almost the entire width of the sole. It extends rearward from substantially the center C of the sole. Advantageously, it extends over at least a quarter of the total length of the sole. It plays in particular the role of a torsion reinforcement. Thus, the border between the rear part 22 and the front part 32 of the second component 21 is substantially positioned at the level of the center C of the sole 20. As a variant, this border can be slightly forward or backward. In all cases, the second component 21 comprises a front part 32 extending substantially longitudinally in the front part of the sole 20.

Ainsi, la semelle obtenue par l'association des deux composants selon l'invention possède des propriétés de rigidité élevées, pour la pratique du skating, en torsion et en flexion, ce qui permet de fournir un maximum de transfert d'énergie du pied au ski lors de la propulsion. La semelle obtenue pour la pratique classique possède des propriétés de rigidité en torsion, qui restent élevées et similaires à la semelle destinée à la pratique du skating, mais est plus souple en flexion sur l'avant du pied, afin de faciliter le mouvement de va et vient vers l'arrière, permettant ainsi un bon déroulé du pied et une bonne impulsion.Thus, the sole obtained by the combination of the two components according to the invention has high rigidity properties, for the practice of skating, in torsion and in flexion, which makes it possible to provide a maximum transfer of energy from the foot to the skiing during propulsion. The sole obtained for classic practice has torsional rigidity properties, which remain high and similar to the sole intended for the practice of skating, but is more flexible in flexion on the front of the foot, in order to facilitate the movement of going. and comes towards the back, thus allowing a good rolling of the foot and a good impulse.

En vue de diminuer les coûts de fabrication et de proposer des semelles adaptées aux deux pratiques de ski de fond dite classique et skating, l'approche retenue selon l'invention permet d'adapter l'architecture de la semelle par la simple modification du second composant 21, le châssis restant inchangé. Ainsi, le même moule de fabrication de la semelle, et plus précisément du châssis, est utilisé dans tous les cas, seul le moule de l'insert étant légèrement modifié.With a view to reducing manufacturing costs and offering soles suitable for both cross-country skiing, known as classic and skating, the approach adopted according to the invention makes it possible to adapt the architecture of the sole by simply modifying the second component 21, the chassis remaining unchanged. Thus, the same mold for manufacturing the sole, and more specifically the frame, is used in all cases, only the insert mold being slightly modified.

L'invention porte aussi sur une chaussure de sport, notamment de ski de fond, comprenant une semelle telle que décrite précédemment. Elle porte aussi sur une série de chaussures, comprenant au moins deux semelles différant uniquement par le second composant, leur premier composant étant identique, au moins par leur forme, et de préférence de forme et matériau identiques. Comme cela a été décrit, l'invention est particulièrement adaptée à une utilisation pour une semelle de ski de fond. Toutefois, rien n'empêche de l'utiliser pour un autre sport.The invention also relates to a sports shoe, in particular for cross-country skiing, comprising a sole as described previously. It also relates to a series of shoes, comprising at least two soles differing only in the second component, their first component being identical, at least in terms of their shape, and preferably of identical shape and material. As has been described, the invention is particularly suitable for use for a cross-country ski sole. However, nothing prevents you from using it for another sport.

Enfin, l'invention porte aussi porte aussi sur un procédé de fabrication d'une semelle de chaussure et plus généralement d'une chaussure de sport, qui comprend les étapes décrites précédemment.Finally, the invention also relates to a method for manufacturing a shoe sole and more generally a sports shoe, which comprises the steps described above.

Naturellement, l'invention ne se limite pas au mode de réalisation et ses variantes décrites. Notamment, la semelle peut comprendre plus de deux composants, comme cela a été vu selon la dernière variante de réalisation. En variante, le talon peut aussi être formé par un composant distinct. Le châssis et/ou le second composant peuvent être formés par l'assemblage de plusieurs pièces, ou être monolithiques comme décrit précédemment. D'autre part, la fixation du second composant sur le châssis peut être amovible, ou non amovible, comme décrit précédemment par le procédé de surmoulage. Dans le cas d'un second composant amovible, il est possible de modifier facilement les propriétés de la semelle d'une chaussure de sport par le simple changement du second composant, notamment de passer d'une chaussure de ski de fond adaptée à la pratique classique à la pratique en skating et vice versa. Selon une autre variante, l'ensemble de la semelle peut être amovible, pour permettre de monter des semelles de propriétés différentes sur la même tige de chaussure.Naturally, the invention is not limited to the embodiment and its variants described. In particular, the sole can comprise more than two components, as has been seen according to the last variant embodiment. Alternatively, the heel can also be formed by a separate component. The chassis and/or the second component can be formed by assembling several parts, or be monolithic as described above. On the other hand, the fixing of the second component on the frame can be removable, or non-removable, as described above by the overmolding process. In the case of a second removable component, it is possible to easily modify the properties of the sole of a sports shoe by simply changing the second component, in particular to go from a cross-country ski boot suitable for classic practice to practice in skating and vice versa. According to another variant, the entire sole can be removable, to allow soles with different properties to be mounted on the same shoe upper.

Finalement, la solution selon l'invention présente donc les avantages suivants : elle permet de fabriquer une semelle légère, à moindre coût, qui réunit des propriétés de confort et de rigidité, notamment de résistance à la flexion et à la torsion. Elle atteint donc bien les objets recherchés.Finally, the solution according to the invention therefore has the following advantages: it makes it possible to manufacture a lightweight sole, at lower cost, which combines properties of comfort and rigidity, in particular resistance to bending and torsion. It therefore achieves the desired objects.

Claims (17)

  1. Sole (20) for a sports shoe, notably for a cross-country ski boot, comprising a first component (1) acting as a framework and at least one second component (21) assembled with the first component (1), characterized in that the second component (21) comprises an anterior part (32) extending substantially longitudinally in an anterior part of the sole (20) and in that the anterior part (32) of the second component (21) of the sole (20) extends between two lateral parts (7) of the anterior part of the first component (1) and/or at least partially between two lateral rows of anterior studs (5) of the first component (1) of the sole.
  2. Sole (20) of a sports shoe according to the preceding claim, characterized in that the first component (1) forms the entirety of the sole (20), with the exception of openings in the central part which are intended to accept the second component (21), the anterior part of the first component (1) comprising two lateral parts (7) delimited by a longitudinal central opening (12) which extends towards the wider central/rear opening 2 situated further towards the rear, approximately in the rear part of the sole.
  3. Sole (20) of a sports shoe according to one of the preceding claims, characterized in that the anterior part (32) of the second component (21) of the sole (20) exhibits all or some of the following additional features:
    - it has an elongate overall shape, with a constant average width, or a width narrower towards the front than towards the rear;
    - it has a rectangular or triangular shape;
    - it has rectilinear or curved sides which may or may not be parallel.
  4. Sole (20) of a sports shoe according to one of the preceding claims, characterized in that the anterior part (32) of the second component (21) of the sole (20) comprises a rib (24) extending over all or part of its length or comprises a row of studs (25) aligned in a transverse direction with lateral anterior studs (5) of the first component (1).
  5. Sole (20) of a sports shoe according to one of the preceding claims, characterized in that the second component (21) comprises a plate-shaped rear part (22) of a width greater than that of the anterior part (32) extending in the forwards direction of the sole.
  6. Sole (20) of a sports shoe according to the preceding claim, characterized in that the rear part (22) of the second component (21) comprises at least one rib.
  7. Sole (20) of a sports shoe according to one of the preceding claims, characterized in that the first component (1) and the second component (21) have different hardnesses and/or stiffnesses.
  8. Sole (20) of a sports shoe according to one of the preceding claims, characterized in that the first component (1) of the sole (20) forms the entirety of the outline of the sole (20).
  9. Sole (20) of a sports shoe according to one of the preceding claims, characterized in that all or some of its studs (3, 5, 25) comprise a surface layer made of a flexible and/or non-slip material.
  10. Cross-country ski boot, characterized in that it comprises a sole (20) according to one of the preceding claims, the first component (1) of which comprises a device for attaching to a gliding board of the cross-country ski type, comprising a transverse connecting pin (4) situated near its anterior end.
  11. Cross-country ski boot intended for the practice of skate style skiing, characterized in that it comprises a sole (20) according to one of Claims 1 to 9 and in that the second component (21) is made of a material with a stiffness or hardness higher than the stiffness or hardness of the material of the first component (1).
  12. Cross-country ski boot according to the preceding claim, characterized in that the anterior part (32) of the second component (21) has a reinforcing rib (24).
  13. Cross-country ski boot intended for the practice of "classic-style" skiing, characterized in that it comprises a sole (20) according to one of Claims 1 to 9 and in that the second component (21) is made of a material with a stiffness or hardness lower than or equal to the stiffness or hardness of the material of the first component (1).
  14. Cross-country ski boot according to the preceding claim, characterized in that the anterior part (32) of the second component (21) has studs (25).
  15. Series of cross-country ski boots, characterized in that it comprises:
    - a first cross-country ski boot intended for the practice known as classic-style skiing, comprising a sole (20) according to one of Claims 1 to 9, in which the anterior part (32) of the second component (21) comprises a row of studs (25),
    - a second cross-country ski boot intended for the practice of skate style skiing, comprising a sole (20) according to one of Claims 1 to 9, in which the anterior part (32) of the second component (21) does not have studs (25),
    the first components (1) of the soles (20) of the said first and second cross-country ski boots being identical.
  16. Method of manufacturing a sole (20) of a sports shoe according to one of Claims 1 to 9, characterized in that it comprises the following steps:
    - manufacturing a second component (21);
    - manufacturing a first component (1);
    - assembling the two components (1, 21), such that the second component (21) comprises an anterior part (32) which extends substantially longitudinally in the anterior part of the sole (20).
  17. Method of manufacturing a sole (20) of a sports shoe according to the preceding claim, characterized in that the assembling of the two components (1, 21) is obtained through a step of overmoulding the first component (1) on the second component (21) placed in an injection mould.
EP16425002.9A 2016-01-22 2016-01-22 Sole of footwear for cross-country skiing Active EP3195748B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16425002.9A EP3195748B1 (en) 2016-01-22 2016-01-22 Sole of footwear for cross-country skiing
US15/410,527 US10834994B2 (en) 2016-01-22 2017-01-19 Cross-country ski boot sole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16425002.9A EP3195748B1 (en) 2016-01-22 2016-01-22 Sole of footwear for cross-country skiing

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EP3195748A1 EP3195748A1 (en) 2017-07-26
EP3195748B1 true EP3195748B1 (en) 2022-07-13

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Publication number Priority date Publication date Assignee Title
US9930934B2 (en) * 2014-07-03 2018-04-03 Nike, Inc. Article of footwear with a segmented plate
USD812874S1 (en) * 2015-11-25 2018-03-20 Salomon S.A.S. Sole of a cross-country ski footwear article
US11071350B2 (en) * 2016-12-31 2021-07-27 Under Armour, Inc. Article of footwear with multiple durometer outsole
JP3228397U (en) * 2017-09-27 2020-10-22 思翔 陳 Luminous sole with natural air circulation function
EP3659456A1 (en) 2018-11-27 2020-06-03 Fischer Sports GmbH Sole structure for a sports shoe

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US4351121A (en) * 1980-05-13 1982-09-28 Wallace Robert E Snowshoe
IT1141823B (en) * 1980-12-11 1986-10-08 Dolomite Spa SKI SHOE WITH STANDARD SOLE
FR2623094B1 (en) * 1987-11-18 1993-06-11 Salomon Sa DEVICE FOR LATERAL GUIDANCE OF A FIXED SKI BOOT, AT ITS FRONT END, ON A SKI SUCH AS A CROSS-COUNTRY SKI
US5410821A (en) * 1992-01-21 1995-05-02 Hilgendorf; Eric Shoe with interchangable soles
DE4343485C1 (en) * 1993-09-14 1995-03-30 Rottefella As Arrangement of a cross-country ski binding
FR2744032B1 (en) * 1996-01-26 1998-04-10 Gallay Philippe DEVICE FOR RETAINING A SHOE ON A SNOWSHOE
DE102004004317A1 (en) * 2004-01-28 2005-08-11 Rottefella As Outsole for a sports shoe, in particular cross-country skiing or telemark shoe
DE602005016132D1 (en) * 2005-12-28 2009-10-01 Lange Int Sa Sports shoe with lateral swiveling
US20120117829A1 (en) * 2010-11-15 2012-05-17 Mountain View Ski Products, LLC Ski boot accessory
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US9265300B2 (en) * 2012-10-26 2016-02-23 K-2 Corporation Base for a ski boot and ski boot incorporating such a base
DE102013208170B4 (en) * 2013-05-03 2019-10-24 Adidas Ag Sole for a shoe and shoe with such a sole

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US20170208893A1 (en) 2017-07-27
US10834994B2 (en) 2020-11-17
EP3195748A1 (en) 2017-07-26

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