EP4098140A1 - Anti-torsion sole for shoe - Google Patents

Anti-torsion sole for shoe Download PDF

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Publication number
EP4098140A1
EP4098140A1 EP22174069.9A EP22174069A EP4098140A1 EP 4098140 A1 EP4098140 A1 EP 4098140A1 EP 22174069 A EP22174069 A EP 22174069A EP 4098140 A1 EP4098140 A1 EP 4098140A1
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EP
European Patent Office
Prior art keywords
sole
cavity
insert
transverse
shoe
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.)
Pending
Application number
EP22174069.9A
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German (de)
French (fr)
Inventor
Arnaud BAYEUX
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Individual
Original Assignee
Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP4098140A1 publication Critical patent/EP4098140A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B3/00—Footwear characterised by the shape or the use
    • A43B3/30—Footwear characterised by the shape or the use specially adapted for babies or small children
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/42—Filling materials located between the insole and outer sole; Stiffening materials

Definitions

  • the invention relates to the field of shoemaking. More specifically, it relates to a device intended to constitute the lower part of a shoe.
  • the invention relates to shoes for children, sometimes referred to as “first steps” shoes, which are intended to facilitate learning to walk.
  • One idea underlying the invention consists in proposing a device for a shoe, and in particular for a “first step” shoe, facilitating the unrolling of the foot while protecting it against twisting.
  • One idea underlying the invention is to provide a cavity in the sole, at the rear of the latter, and to insert therein a part, called an "insert", which is stiffer than the sole.
  • the cavity be located at the upper surface of the sole to facilitate the positioning of the insert.
  • Another idea underlying the invention is to have an insert that is as wide as possible to obtain greater stiffness in the rear part of the boot without degrading the manufacturing robustness of the boot equipped with such a device.
  • such a device is advantageous in that the insert provides protection against twisting of the foot without degrading the flexibility of the front portion of the sole, which allows the foot to roll smoothly.
  • plane underside means that the underside of the sole has no heel or heel piece. Thus, with the exception of any projections or anti-slip patterns, the underside of the sole extends in one plane.
  • such a device may comprise one or more of the following characteristics.
  • the sole has a thickness which increases towards the rear and the cavity is less and less hollow towards the front.
  • the cavity has a bevelled bottom and its depth increases from back to front. This makes it possible to take advantage of a thickness of the upper sole towards the rear to optimize the thickness of the insert and further increase the torsional stiffness of the boot in the rear portion.
  • the cavity has a transverse front edge, a transverse rear edge and two side edges each connecting the transverse front edge and the transverse rear edge.
  • the transverse front edge is connected to each of the side edges by a fillet.
  • the insert having a shape complementary to that of the cavity, its front edge does not have any projecting angle liable to locally degrade the sole.
  • the transverse rear edge of the cavity is curved.
  • the insert having a shape complementary to that of the cavity, its rear edge does not present no salient angle likely to locally degrade the sole.
  • the transverse rear edge runs along the peripheral edge of the sole, which makes it possible to dispose at the rear of the cavity of a bonding surface for bonding a shoe upper to the sole.
  • the transverse front edge of the cavity is positioned at a distance from a rear end of the sole which is between 0.4 and 0.6 L, and advantageously between 0.45 L and 0, 52 L with L: a length of the sole along the longitudinal axis. This makes it possible to optimize the torsional stiffness of the boot without affecting the smooth rolling of the foot over its entire length.
  • the sole has a peripheral edge and the longitudinal side edges and the transverse rear edge of the cavity are positioned at a distance y from the peripheral edge of the sole of between 0.4 and 1.2 cm, and advantageously between 0.5 and 0.8 cm. This makes it possible to optimize the dimensions of the insert, while having around the cavity a sufficient surface to allow satisfactory bonding of the upper of the shoe to the rear part of the sole.
  • the sole is made of an elastomeric material. This makes it possible to give the sole satisfactory flexibility at the front.
  • the sole is made of a material having a hardness of between 40 and 70 shore.
  • the insert is made of a plastic material.
  • the insert is made of a material having a hardness of between 95 and 102 MPa, measured according to the ISO2039-1 method.
  • the sole has a rise at the rear.
  • the invention relates to a shoe, preferably a shoe for a child, provided with an aforementioned device.
  • the shoe has a length of between 11 and 16.5 cm.
  • the figure 1 represents a device intended to constitute the lower part of a shoe, in an exploded form.
  • a sole 1 and an insert 7 are distinguished.
  • the sole 1 comprises a lower face 9 and an upper face 10.
  • the underside 9 is flat, that is to say that it does not have a heel or heel piece.
  • the lower face 9 comprises anti-slip projections or patterns.
  • the sole 1 comprises, on its periphery, a peripheral flange 2 which projects upwards from the edge of the sole 1.
  • the peripheral flange 2 defines a space inside which the upper of the shoe, not shown, will be positioned then glued against the upper face 10 of the sole 1.
  • the upper face 10 of the sole has a cavity 3 which is formed at the rear thereof and in which the insert 1 is housed.
  • the insert 1 has a shape complementary to that of the cavity 3. According to one mode advantageous embodiment, the insert 1 is not fixed in the cavity 3, which facilitates the manufacturing process. It will also be noted that from the point of view of the manufacturing processes, it is easier to manufacture two homogeneous parts then to assemble them than to manufacture a heterogeneous part.
  • the cavity 3 has a transverse front edge 4, a transverse rear edge 11 and two side edges 5, 12 which extend along the longitudinal direction of the sole 1 and which connect the transverse rear edge 4 and the transverse front edge 5.
  • the transverse front edge 4 is positioned at a distance d (shown on the picture 3 ) of the rear end of the sole 1 which is between 0.4L and 0.6L and advantageously 0.45L and 0.52L, with L: the length of the shoe along its longitudinal axis.
  • the cavity 3 extends from approximately the middle of the sole towards the rear thereof.
  • the cavity 3 is thinner in the middle of the sole and gradually deepens towards the rear where the sole is thicker.
  • the transverse rear edge 4 is curved and runs along the peripheral edge 2 of the sole 1.
  • the side edges 5, 12 run along the peripheral edge 2 of the sole 1.
  • the transverse rear edge 4 as well as the side edges 5, 12 are spaced from the peripheral rim 2 by a distance y which is between 0.4 and 1.2 cm and advantageously between 0.5 and 0.8 cm. This makes it possible to define between the cavity 3 and the peripheral rim 2, a rim 6 wide enough to allow effective bonding of the shoe upper to the sole 1.
  • the side edges 5, 12 are each connected to the front transverse edge 4 by a fillet 13.
  • the insert 7 has a shape complementary to the cavity 3 of the sole 1. It can thus be accommodated in the sole 1 without it protruding.
  • the insert also has fillets 8 between its front edge and its side edges which prevents it from shearing the sole 1.
  • the sole 1 is made of an elastic material, preferably an elastomeric material, such as rubber. This material has a hardness of between 40 and 70 shore, for example of the order of 55 shore.
  • the insert 7 is made of a more rigid material than that of the sole, preferably a rigid plastic such as Acrylonitrile Butadiene Styrene (ABS). Such a plastic has for example a hardness of between 95 MPa and 102 MPa and typically of the order of 97 MPa, measured according to the ISO 2039-1 ball penetration method.
  • the tensile modulus (Young's modulus) of the material of the insert 7 is greater than that of the material of the sole 1 and is, for example, of the order of 2300 MPa and comprised between 2100 and 2500 MPa measured according to the ISO 527 method.
  • Such an insert 7 thus makes it possible to limit the risks of lateral torsion of the foot. Furthermore, as the insert 7 is placed on a rear portion of the sole 1, the front portion of the sole 1 remains free in bending around a transverse axis, as illustrated in picture 2 , which facilitates a good rolling of the foot.
  • Such a device is intended to be integrated into shoes; it is more particularly intended for shoes for children and in particular for "first steps" shoes.
  • the sole further comprises two reliefs, one at the front and the other at the rear.
  • Such a device is particularly intended for shoes having an EU size of the order of 18 to 25, that is to say for feet having a length of between 11.1 cm and 15.6 cm. Such shoes therefore have a length of between 11 and 16.5 cm.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • General Health & Medical Sciences (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

L'invention concerne un dispositif pour chaussures comprenant une semelle (1) dans laquelle est creusée une cavité (3) à l'arrière et un insert (7) logé dans la cavité et plus rigide que la semelle, limitant ainsi la torsion autour d'un axe longitudinal de la semelle. Un tel dispositif est destiné à être intégré dans des chaussures ; il est plus particulièrement destiné aux chaussures pour enfants.The invention relates to a device for footwear comprising a sole (1) in which a cavity (3) is hollowed out at the rear and an insert (7) housed in the cavity and more rigid than the sole, thus limiting the torsion around the sole. a longitudinal axis of the sole. Such a device is intended to be integrated into shoes; it is more particularly intended for children's shoes.

Description

Domaine techniqueTechnical area

L'invention se rapporte au domaine de la cordonnerie. Plus précisément, elle concerne un dispositif destiné à constituer la partie inférieure d'une chaussure.The invention relates to the field of shoemaking. More specifically, it relates to a device intended to constitute the lower part of a shoe.

Plus particulièrement, l'invention se rapporte aux chaussures pour enfant, parfois désigné chaussures « premiers pas » qui sont destinés à faciliter l'apprentissage de la marche.More particularly, the invention relates to shoes for children, sometimes referred to as “first steps” shoes, which are intended to facilitate learning to walk.

Arrière-plan technologiqueTechnology background

Il est connu que, pour faciliter l'apprentissage de la marche, les semelles des chaussures « premiers pas » doivent être suffisamment souples pour faciliter le déroulement du pied et ne pas gêner ainsi le développement naturel des muscles souteneurs de la voute plantaire.It is known that, to facilitate learning to walk, the soles of “first steps” shoes must be flexible enough to facilitate rolling of the foot and thus not hinder the natural development of the supporting muscles of the plantar arch.

Toutefois, de manière contradictoire, les chaussures « premiers pas » doivent également garantir un bon maintien du pied et le protéger contre toute torsion latérale.However, in a contradictory way, “first steps” shoes must also guarantee good support for the foot and protect it against any lateral torsion.

L'idée de renforcer la semelle d'une chaussure, c'est-à-dire de lui donner une meilleure tenue à l'aide d'une pièce insérée dans la semelle est connue. Ainsi, dans les chaussures à talons ou talonnettes pour adulte, il est connu d'insérer un renfort dit « cambrion » dans la semelle au niveau de la cambrure de la chaussure entre son talon et sa zone d'appui avant, ce qui permet à la chaussure d'éviter de s'affaisser au niveau de ladite cambrure lors de la marche.The idea of reinforcing the sole of a shoe, that is to say of giving it better hold with the aid of a piece inserted into the sole, is well known. Thus, in shoes with heels or heel pads for adults, it is known to insert a so-called "shank" reinforcement in the sole at the level of the camber of the shoe between its heel and its front support zone, which allows the shoe to avoid sagging at said arch during walking.

Mais de telles semelles ne sont pas adaptées à l'apprentissage de la marche, en ce qu'elles ne permettent pas un bon déroulement du pied.But such soles are not suitable for learning to walk, in that they do not allow the foot to roll smoothly.

RésuméSummary

Une idée à la base de l'invention consiste à proposer un dispositif pour une chaussure, et notamment pour une chaussure « premier pas », facilitant le déroulement du pied tout en le protégeant contre les torsions.One idea underlying the invention consists in proposing a device for a shoe, and in particular for a “first step” shoe, facilitating the unrolling of the foot while protecting it against twisting.

Une idée à la base de l'invention est de prévoir une cavité dans la semelle, à l'arrière de celle-ci, et d'y insérer une pièce, dite « insert », plus raide que la semelle.One idea underlying the invention is to provide a cavity in the sole, at the rear of the latter, and to insert therein a part, called an "insert", which is stiffer than the sole.

Une autre idée à la base de l'invention est que la cavité soit située à la surface supérieure de la semelle pour faciliter la mise en place de l'insert.Another idea underlying the invention is that the cavity be located at the upper surface of the sole to facilitate the positioning of the insert.

Une autre idée à la base de l'invention est d'avoir un insert aussi large que possible pour obtenir une plus grande raideur de la partie arrière de la chaussure sans dégrader la robustesse de fabrication de la chaussure équipée d'un tel dispositif.Another idea underlying the invention is to have an insert that is as wide as possible to obtain greater stiffness in the rear part of the boot without degrading the manufacturing robustness of the boot equipped with such a device.

Un premier objet de l'invention est un dispositif pour une chaussure comprenant :

  • Une semelle s'étendant selon un axe longitudinal et présentant une face inférieure plane destinée à reposer contre le sol et une face supérieure, la face supérieure ayant une portion arrière et une portion avant, la portion arrière comportant une cavité, et
  • Un insert ayant une forme complémentaire à celle de la cavité, l'insert étant logé dans ladite cavité et présentant une raideur en torsion autour de l'axe longitudinal supérieure à une raideur en torsion de la semelle autour dudit axe longitudinal.
A first object of the invention is a device for a shoe comprising:
  • A sole extending along a longitudinal axis and having a flat lower face intended to rest against the ground and an upper face, the upper face having a rear portion and a front portion, the rear portion comprising a cavity, and
  • An insert having a shape complementary to that of the cavity, the insert being housed in said cavity and having a torsional stiffness around the longitudinal axis greater than a torsional stiffness of the sole around said longitudinal axis.

Ainsi, un tel dispositif est avantageux en ce que l'insert confère une protection contre les torsions du pied sans dégrader la souplesse de la portion avant de la semelle, ce qui autorise un bon déroulement du pied.Thus, such a device is advantageous in that the insert provides protection against twisting of the foot without degrading the flexibility of the front portion of the sole, which allows the foot to roll smoothly.

Au sens de la présente invention, l'expression « face inférieure plane » signifie que la face inférieure de la semelle est dépourvue de talon ou talonnette. Ainsi, à l'exception d'éventuelles saillies ou motifs anti-dérapants, la face inférieure de la semelle s'étend dans un plan.Within the meaning of the present invention, the expression “plane underside” means that the underside of the sole has no heel or heel piece. Thus, with the exception of any projections or anti-slip patterns, the underside of the sole extends in one plane.

Selon des modes de réalisation, un tel dispositif peut comporter une ou plusieurs des caractéristiques suivantes.According to embodiments, such a device may comprise one or more of the following characteristics.

Selon un mode de réalisation, la semelle présente une épaisseur qui augmente vers l'arrière et la cavité est de moins en moins creuse vers l'avant. En d'autres termes, la cavité présente un fond en biseau et sa profondeur augmente de l'arrière vers l'avant. Ceci permet de profiter d'une épaisseur de la semelle supérieure vers l'arrière pour optimiser l'épaisseur de l'insert et augmenter encore davantage la raideur en torsion de la chaussure dans la portion arrière.According to one embodiment, the sole has a thickness which increases towards the rear and the cavity is less and less hollow towards the front. In other words, the cavity has a bevelled bottom and its depth increases from back to front. This makes it possible to take advantage of a thickness of the upper sole towards the rear to optimize the thickness of the insert and further increase the torsional stiffness of the boot in the rear portion.

Selon un mode de réalisation, la cavité présente un bord avant transversal, un bord arrière transversal et deux bords latéraux reliant chacun le bord avant transversal et le bord arrière transversal.According to one embodiment, the cavity has a transverse front edge, a transverse rear edge and two side edges each connecting the transverse front edge and the transverse rear edge.

Selon un mode de réalisation, le bord avant transversal est raccordé à chacun des bords latéraux par un congé. Ainsi, l'insert ayant une forme complémentaire à celle de la cavité, son bord avant ne présente pas d'angle saillant susceptible de dégrader localement la semelle.According to one embodiment, the transverse front edge is connected to each of the side edges by a fillet. Thus, the insert having a shape complementary to that of the cavity, its front edge does not have any projecting angle liable to locally degrade the sole.

Selon un mode de réalisation, le bord arrière transversal de la cavité est courbe. Ainsi, l'insert ayant une forme complémentaire à celle de la cavité, son bord arrière ne présente pas d'angle saillant susceptible de dégrader localement la semelle. En outre, le bord arrière transversal longe le rebord périphérique de la semelle, ce qui permet de disposer à l'arrière de la cavité d'une surface de collage pour coller une tige de chaussure à la semelle.According to one embodiment, the transverse rear edge of the cavity is curved. Thus, the insert having a shape complementary to that of the cavity, its rear edge does not present no salient angle likely to locally degrade the sole. In addition, the transverse rear edge runs along the peripheral edge of the sole, which makes it possible to dispose at the rear of the cavity of a bonding surface for bonding a shoe upper to the sole.

Selon un mode de réalisation, le bord avant transversal de la cavité est positionné à une distance d d'une extrémité arrière de la semelle qui est comprise entre 0,4 et 0,6 L, et avantageusement entre 0,45 L et 0,52 L avec L : une longueur de la semelle selon l'axe longitudinal. Ceci permet d'optimiser la raideur en torsion de la chaussure sans affecter le bon déroulement du pied sur toute sa longueur.According to one embodiment, the transverse front edge of the cavity is positioned at a distance from a rear end of the sole which is between 0.4 and 0.6 L, and advantageously between 0.45 L and 0, 52 L with L: a length of the sole along the longitudinal axis. This makes it possible to optimize the torsional stiffness of the boot without affecting the smooth rolling of the foot over its entire length.

Selon un mode de réalisation, la semelle présente un rebord périphérique et les bords latéraux longitudinaux et le bord arrière transversal de la cavité sont positionnés à une distance y du rebord périphérique de la semelle comprise entre 0,4 et 1,2 cm, et avantageusement entre 0, 5 et 0,8 cm. Ceci permet d'optimiser les dimensions de l'insert, tout en disposant autour de la cavité d'une surface suffisante pour permettre un collage satisfaisant de la tige de la chaussure sur la partie arrière de la semelle.According to one embodiment, the sole has a peripheral edge and the longitudinal side edges and the transverse rear edge of the cavity are positioned at a distance y from the peripheral edge of the sole of between 0.4 and 1.2 cm, and advantageously between 0.5 and 0.8 cm. This makes it possible to optimize the dimensions of the insert, while having around the cavity a sufficient surface to allow satisfactory bonding of the upper of the shoe to the rear part of the sole.

Selon un mode de réalisation, la semelle est réalisée dans un matériau élastomère. Ceci permet de conférer à la semelle une flexibilité satisfaisante à l'avant.According to one embodiment, the sole is made of an elastomeric material. This makes it possible to give the sole satisfactory flexibility at the front.

Selon un mode de réalisation, la semelle est réalisée dans un matériau présentant une dureté comprise entre 40 et 70 shore. Selon un mode de réalisation, l'insert est réalisé dans un matériau plastique.According to one embodiment, the sole is made of a material having a hardness of between 40 and 70 shore. According to one embodiment, the insert is made of a plastic material.

Selon un mode de réalisation, l'insert est réalisé dans un matériau présentant une dureté comprise entre 95et 102 MPa, mesurée selon la méthode ISO2039-1.According to one embodiment, the insert is made of a material having a hardness of between 95 and 102 MPa, measured according to the ISO2039-1 method.

Selon un mode de réalisation, la semelle présente un relèvement à l'arrière.According to one embodiment, the sole has a rise at the rear.

Selon un second aspect, l'invention concerne une chaussure, de préférence une chaussure pour enfant, pourvue d'un dispositif précité.According to a second aspect, the invention relates to a shoe, preferably a shoe for a child, provided with an aforementioned device.

Selon un mode de réalisation, la chaussure présente une longueur comprise entre 11 et 16,5 cm.According to one embodiment, the shoe has a length of between 11 and 16.5 cm.

Brève description des figuresBrief description of figures

L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaîtront plus clairement au cours de la description suivante de plusieurs modes de réalisation particuliers de l'invention, donnés uniquement à titre illustratif et non limitatif, en référence aux dessins annexés.

  • [fig.1] La figure 1 représente une vue éclatée du dispositif illustrant la semelle avec sa cavité et l'insert présentant une forme complémentaire à celle de la cavité.
  • [fig.2] La figure 2 est une vue du dispositif où la semelle est fléchie autour d'un axe qui lui est transversal.
  • [fig.3] La figure 3 est une vue de la semelle en coupe selon un plan longitudinal.
The invention will be better understood, and other aims, details, characteristics and advantages thereof will appear more clearly during the following description of several particular embodiments of the invention, given solely by way of illustration and not limitation. , with reference to the accompanying drawings.
  • [ fig.1 ] The figure 1 represents an exploded view of the device illustrating the sole with its cavity and the insert having a shape complementary to that of the cavity.
  • [ fig.2 ] The picture 2 is a view of the device where the sole is bent around an axis which is transverse to it.
  • [ fig.3 ] The picture 3 is a view of the sole in section along a longitudinal plane.

Description des modes de réalisationDescription of embodiments

La figure 1 représente un dispositif destiné à constituer la partie inférieure d'une chaussure, sous une forme éclatée. On distingue une semelle 1 et un insert 7. La semelle 1 comporte une face inférieure 9 et une face supérieure 10. Comme illustré sur les figures 2 et 3, la face inférieure 9 est plane, c'est-à-dire qu'elle ne comporte pas de talon ou talonnette. Selon un mode de réalisation, non illustré, la face inférieure 9 comporte des saillies ou motifs anti-dérapants.The figure 1 represents a device intended to constitute the lower part of a shoe, in an exploded form. A sole 1 and an insert 7 are distinguished. The sole 1 comprises a lower face 9 and an upper face 10. As illustrated in the figure 2 and 3 , the underside 9 is flat, that is to say that it does not have a heel or heel piece. According to one embodiment, not illustrated, the lower face 9 comprises anti-slip projections or patterns.

La semelle 1 comporte, sur son pourtour, un rebord périphérique 2 qui fait saillie vers le haut depuis le bord de la semelle 1. Le rebord périphérique 2 définit un espace à l'intérieur duquel la tige de la chaussure, non représentée, va être positionnée puis collée contre la face supérieure 10 de la semelle 1.The sole 1 comprises, on its periphery, a peripheral flange 2 which projects upwards from the edge of the sole 1. The peripheral flange 2 defines a space inside which the upper of the shoe, not shown, will be positioned then glued against the upper face 10 of the sole 1.

La face supérieure 10 de la semelle présente une cavité 3 qui est formée à l'arrière de celle-ci et dans lequel est logé l'insert 1. L'insert 1 a une forme complémentaire à celle de la cavité 3. Selon un mode de réalisation avantageux, l'insert 1 n'est pas fixé dans la cavité 3, ce qui permet de faciliter le procédé de fabrication. On notera en outre que du point de vue des processus de fabrication, il est plus facile de fabriquer deux pièces homogènes puis de les assembler que de fabriquer une pièce hétérogène.The upper face 10 of the sole has a cavity 3 which is formed at the rear thereof and in which the insert 1 is housed. The insert 1 has a shape complementary to that of the cavity 3. According to one mode advantageous embodiment, the insert 1 is not fixed in the cavity 3, which facilitates the manufacturing process. It will also be noted that from the point of view of the manufacturing processes, it is easier to manufacture two homogeneous parts then to assemble them than to manufacture a heterogeneous part.

La cavité 3 présente un bord avant transversal 4, un bord arrière transversal 11 et deux bords latéraux 5, 12 qui s'étendent selon la direction longitudinale de la semelle 1 et qui relient le bord arrière transversal 4 et le bord avant transversal 5. Le bord avant transversal 4 est positionné à une distance d (représentée sur la figure 3) de l'extrémité arrière de la semelle 1 qui est comprise entre 0,4L et 0,6L et avantageusement 0,45 L et 0,52 L, avec L : la longueur de la chaussure selon son axe longitudinal. Dans le mode de réalisation représenté, la cavité 3 s'étend depuis à peu près le milieu de la semelle vers l'arrière de celle-ci. La cavité 3 est plus fine au milieu de la semelle et s'approfondit progressivement vers l'arrière où la semelle est plus épaisse. Le bord arrière transversal 4 est courbe et longe le rebord périphérique 2 de la semelle 1. De même, les bords latéraux 5, 12 longent le rebord périphérique 2 de la semelle 1. Le bord arrière transversal 4 ainsi que les bords latéraux 5, 12 sont espacés du rebord périphérique 2 d'une distance y qui est comprise entre 0,4 et 1,2 cm et avantageusement comprise entre 0,5 et 0,8 cm. Ceci permet de définir entre la cavité 3 et le rebord périphérique 2, un rebord 6 suffisamment large pour permettre un collage efficace de la tige de chaussure à la semelle 1. Par ailleurs, les bords latéraux 5, 12 sont chacun raccordés au bord transversal avant 4 par un congé 13.The cavity 3 has a transverse front edge 4, a transverse rear edge 11 and two side edges 5, 12 which extend along the longitudinal direction of the sole 1 and which connect the transverse rear edge 4 and the transverse front edge 5. The transverse front edge 4 is positioned at a distance d (shown on the picture 3 ) of the rear end of the sole 1 which is between 0.4L and 0.6L and advantageously 0.45L and 0.52L, with L: the length of the shoe along its longitudinal axis. In the embodiment shown, the cavity 3 extends from approximately the middle of the sole towards the rear thereof. The cavity 3 is thinner in the middle of the sole and gradually deepens towards the rear where the sole is thicker. The transverse rear edge 4 is curved and runs along the peripheral edge 2 of the sole 1. Similarly, the side edges 5, 12 run along the peripheral edge 2 of the sole 1. The transverse rear edge 4 as well as the side edges 5, 12 are spaced from the peripheral rim 2 by a distance y which is between 0.4 and 1.2 cm and advantageously between 0.5 and 0.8 cm. This makes it possible to define between the cavity 3 and the peripheral rim 2, a rim 6 wide enough to allow effective bonding of the shoe upper to the sole 1. Furthermore, the side edges 5, 12 are each connected to the front transverse edge 4 by a fillet 13.

L'insert 7 a une forme complémentaire à la cavité 3 de la semelle 1. On peut ainsi le loger dans la semelle 1 sans qu'il en dépasse. En outre, l'insert comporte également des congés 8 entre son bord avant et ses bords latéraux ce qui lui évite de cisailler la semelle 1.The insert 7 has a shape complementary to the cavity 3 of the sole 1. It can thus be accommodated in the sole 1 without it protruding. In addition, the insert also has fillets 8 between its front edge and its side edges which prevents it from shearing the sole 1.

La semelle 1 est fabriquée dans un matériau élastique, de préférence dans un matériau élastomère, tel que du caoutchouc. Ce matériau présente une dureté comprise entre 40 et 70 shore, par exemple de l'ordre de 55 shore.The sole 1 is made of an elastic material, preferably an elastomeric material, such as rubber. This material has a hardness of between 40 and 70 shore, for example of the order of 55 shore.

L'insert 7 est fabriqué dans un matériau plus rigide que celui de la semelle, de préférence un plastique rigide comme l'Acrylonitrile Butadiène Styrène (ABS). Un tel plastique présente par exemple une dureté comprise entre 95 MPa et 102 MPa et typiquement de l'ordre de 97 MPa, mesuré selon la méthode de pénétration par bille ISO 2039-1. Le module de traction (module d'Young) du matériau de l'insert 7 est supérieur à celui du matériau de la semelle 1 et est, par exemple, de l'ordre de 2300 MPa et compris entre 2100 et 2500 MPa mesuré selon la méthode ISO 527.The insert 7 is made of a more rigid material than that of the sole, preferably a rigid plastic such as Acrylonitrile Butadiene Styrene (ABS). Such a plastic has for example a hardness of between 95 MPa and 102 MPa and typically of the order of 97 MPa, measured according to the ISO 2039-1 ball penetration method. The tensile modulus (Young's modulus) of the material of the insert 7 is greater than that of the material of the sole 1 and is, for example, of the order of 2300 MPa and comprised between 2100 and 2500 MPa measured according to the ISO 527 method.

Un tel insert 7 permet ainsi de limiter les risques de torsion latérale du pied. En outre, comme l'insert 7 est placé sur une portion arrière de la semelle 1, la portion avant de la semelle 1 reste libre en flexion autour d'un axe transversal, comme illustré à la figure 2, ce qui permet de faciliter un bon déroulement du pied.Such an insert 7 thus makes it possible to limit the risks of lateral torsion of the foot. Furthermore, as the insert 7 is placed on a rear portion of the sole 1, the front portion of the sole 1 remains free in bending around a transverse axis, as illustrated in picture 2 , which facilitates a good rolling of the foot.

Un tel dispositif est destiné à être intégré dans des chaussures ; il est plus particulièrement destiné aux chaussures pour enfants et notamment aux chaussures « premiers pas ». Comme représenté sur les figures, dans de telles chaussures, la semelle comporte en outre deux relèves, l'une à l'avant et l'autre à l'arrière.Such a device is intended to be integrated into shoes; it is more particularly intended for shoes for children and in particular for "first steps" shoes. As shown in the figures, in such shoes, the sole further comprises two reliefs, one at the front and the other at the rear.

Un tel dispositif est tout particulièrement destiné à des chaussures ayant une pointure EU de l'ordre du 18 au 25, c'est-à-dire pour des pieds ayant une longueur comprise entre 11, 1 cm et 15, 6 cm. De telles chaussures présentent donc une longueur comprise entre 11 et 16,5 cm.Such a device is particularly intended for shoes having an EU size of the order of 18 to 25, that is to say for feet having a length of between 11.1 cm and 15.6 cm. Such shoes therefore have a length of between 11 and 16.5 cm.

Bien que l'invention ait été décrite en liaison avec plusieurs modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention.Although the invention has been described in connection with several particular embodiments, it is quite obvious that it is in no way limited thereto and that it includes all the technical equivalents of the means described as well as their combinations if these fall within the scope of the invention.

L'usage du verbe « comporter », « comprendre » ou « inclure » et de ses formes conjuguées n'exclut pas la présence d'autres éléments ou d'autres étapes que ceux énoncés dans une revendication.The use of the verb "to comprise", "to understand" or "to include" and of its conjugated forms does not exclude the presence of other elements or other steps than those set out in a claim.

Dans les revendications, tout signe de référence entre parenthèses ne saurait être interprété comme une limitation de la revendication.In the claims, any reference sign in parentheses cannot be interpreted as a limitation of the claim.

Claims (12)

Dispositif pour une chaussure comprenant : - Une semelle (1) s'étendant selon un axe longitudinal et présentant une face inférieure (9) plane destinée à reposer contre le sol et une face supérieure (10), la face supérieure (10) ayant une portion arrière et une portion avant, la portion arrière comportant une cavité (3),et - Un insert (7) ayant une forme complémentaire à celle de la cavité (3), l'insert (7) étant logé dans ladite cavité (3) et présentant une raideur en torsion autour de l'axe longitudinal supérieure à une raideur en torsion de la semelle autour dudit axe longitudinal, dans lequel la semelle (1) présente une épaisseur qui augmente vers l'arrière et la cavité (3) est de moins en moins creuse vers l'avant.Device for a shoe comprising: - A sole (1) extending along a longitudinal axis and having a flat lower face (9) intended to rest against the ground and an upper face (10), the upper face (10) having a rear portion and a front portion , the rear portion comprising a cavity (3), and - An insert (7) having a shape complementary to that of the cavity (3), the insert (7) being housed in the said cavity (3) and having a stiffness in torsion around the longitudinal axis greater than a stiffness in torsion of the sole around said longitudinal axis, in which the sole (1) has a thickness which increases towards the rear and the cavity (3) is less and less hollow towards the front. Dispositif selon la revendication 1, dans lequel la cavité (3) présente un bord avant transversal (4), un bord arrière transversal (11) et deux bords latéraux (5, 12) reliant chacun le bord avant transversal (4) et le bord arrière transversal (11).Device according to Claim 1, in which the cavity (3) has a transverse front edge (4), a transverse rear edge (11) and two lateral edges (5, 12) each connecting the transverse front edge (4) and the transverse rear (11). Dispositif selon la revendication 2, dans lequel le bord avant transversal (4) est raccordé à chacun des bords latéraux (5, 12) par un congé (13).Device according to Claim 2, in which the transverse front edge (4) is connected to each of the side edges (5, 12) by a fillet (13). Dispositif selon la revendication 2 ou 3, dans lequel le bord arrière transversal (11) de la cavité (3) est courbe.Device according to Claim 2 or 3, in which the transverse rear edge (11) of the cavity (3) is curved. Dispositif selon l'une quelconque des revendications 2 à 4, dans lequel le bord avant transversal (4) de la cavité (3) est positionné à une distance d d'une extrémité arrière de la semelle (1) qui est comprise entre 0,4 et 0,6 L avec L : une longueur de la semelle (1) selon l'axe longitudinal.Device according to any one of Claims 2 to 4, in which the transverse front edge (4) of the cavity (3) is positioned at a distance d from a rear end of the sole (1) which is between 0, 4 and 0.6 L with L: a length of the sole (1) along the longitudinal axis. Dispositif selon l'une quelconque des revendications 2 à 5, dans lequel la semelle (1) présente un rebord périphérique (2) et dans lequel les bords latéraux (5, 12) et le bord arrière transversal (11) de la cavité (3) sont positionnées à une distance y du rebord périphérique de la semelle comprise entre 0,4 et 1,2 cm.Device according to any one of Claims 2 to 5, in which the sole (1) has a peripheral rim (2) and in which the side edges (5, 12) and the transverse rear edge (11) of the cavity (3 ) are positioned at a distance y from the peripheral edge of the sole of between 0.4 and 1.2 cm. Dispositif selon l'une des revendications précédentes, dans lequel la semelle (1) est réalisée dans un matériau élastomère.Device according to one of the preceding claims, in which the sole (1) is made of an elastomeric material. Dispositif selon l'une des revendications 1 à 7, dans lequel l'insert (7) est réalisé dans un matériau plastique.Device according to one of Claims 1 to 7, in which the insert (7) is made of a plastic material. Dispositif selon l'une quelconque des revendications 1 à 8, dans lequel l'insert (7) est réalisé dans un matériau présentant une dureté comprise entre 95 et 102 MPa, mesurée selon la méthode ISO2039-1 .Device according to any one of Claims 1 to 8, in which the insert (7) is made of a material having a hardness of between 95 and 102 MPa, measured according to the ISO2039-1 method. Dispositif selon l'une des revendications 1 à 9, dans lequel la semelle (1) présente un relèvement à l'arrière.Device according to one of Claims 1 to 9, in which the sole (1) has a rear elevation. Chaussure pourvue d'un dispositif selon l'une des revendications 1 à 10.Shoe provided with a device according to one of Claims 1 to 10. Chaussure selon la revendication 11, dans lequel la chaussure présente une longueur comprise entre 11 et 16,5 cm.Shoe according to Claim 11, in which the shoe has a length of between 11 and 16.5 cm.
EP22174069.9A 2021-06-04 2022-05-18 Anti-torsion sole for shoe Pending EP4098140A1 (en)

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FR2105913A FR3123544A1 (en) 2021-06-04 2021-06-04 Anti-torsion shoe sole

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739533A1 (en) * 1995-10-06 1997-04-11 Scop Minibel Sa Sole for footwear with shock absorber under heel
EP1754423A1 (en) * 2004-06-10 2007-02-21 Aprica Ikujikenkyukai Aprica Kassai Kabushikikaisha Shoe
US20110067267A1 (en) * 2009-09-23 2011-03-24 Lubart Randy N Shoe Construction Having A Rocker Shaped Bottom And Integral Stabilizer
US20190343225A1 (en) * 2018-05-14 2019-11-14 Twisted X, Inc. Cushioning for shoe sole

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739533A1 (en) * 1995-10-06 1997-04-11 Scop Minibel Sa Sole for footwear with shock absorber under heel
EP1754423A1 (en) * 2004-06-10 2007-02-21 Aprica Ikujikenkyukai Aprica Kassai Kabushikikaisha Shoe
US20110067267A1 (en) * 2009-09-23 2011-03-24 Lubart Randy N Shoe Construction Having A Rocker Shaped Bottom And Integral Stabilizer
US20190343225A1 (en) * 2018-05-14 2019-11-14 Twisted X, Inc. Cushioning for shoe sole

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