EP2042050A1 - Sports shoe with raised patterns in foam - Google Patents

Sports shoe with raised patterns in foam Download PDF

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Publication number
EP2042050A1
EP2042050A1 EP07425591A EP07425591A EP2042050A1 EP 2042050 A1 EP2042050 A1 EP 2042050A1 EP 07425591 A EP07425591 A EP 07425591A EP 07425591 A EP07425591 A EP 07425591A EP 2042050 A1 EP2042050 A1 EP 2042050A1
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EP
European Patent Office
Prior art keywords
foam
comfort element
sports
comfort
layer
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.)
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Application number
EP07425591A
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German (de)
French (fr)
Inventor
Riccardo Perotto
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Rossignol Lange SRL
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Rossignol Lange SRL
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Filing date
Publication date
Application filed by Rossignol Lange SRL filed Critical Rossignol Lange SRL
Priority to EP07425591A priority Critical patent/EP2042050A1/en
Publication of EP2042050A1 publication Critical patent/EP2042050A1/en
Withdrawn legal-status Critical Current

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    • 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
    • A43B5/0405—Linings, paddings or insertions; Inner boots
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B19/00—Shoe-shaped inserts; Inserts covering the instep
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/26—Tongues for shoes
    • 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
    • A43B5/0496—Ski or like boots boots for touring or hiking skis

Definitions

  • the invention relates to a comfort element for sports shoes, all or part of a sports shoe incorporating such a comfort element, and in particular a boot for a ski boot and the associated ski boot. It is particularly suitable for application on the tongue of the boot of the ski boot. It also relates to a method of manufacturing a comfort element of such a shoe.
  • a ski boot consists of a rigid rod surrounding a comfort boot in which the skier slides his foot.
  • a liner comprises a tab in its front part, which can deviate under the pressure of the foot through a notch of the shoe upper to facilitate the boot and the heaving of the shoe.
  • This slipper fulfills contradictory functions. It must ensure a good support for the foot to obtain an effective guide of the ski, which requires a rigid structure, while providing comfort to the skier, which requires a flexible structure to lessen the uncomfortable effects of the rigid rod surrounding the liner.
  • the liner should also advantageously produce a first feeling cozy and pleasant when donning because the user is very sensitive.
  • the document EP0370948 illustrates a conventional construction of a slipper of the state of the art, wherein, to limit the pain points in the tibia, the tongue comprises a multilayer structure comprising an outer layer of rigid material to meet the requirement for maintaining the liner, a layer of foam that dampens the shocks exerted on the shin, covered on the inside of the tongue with a fabric that protects the foam from rapid wear as a result of the numerous friction against the skier's leg, and it also avoids direct contact with the snow.
  • This fabric also allows to ensure an attractive aesthetic of the tongue.
  • the rest of the shoe has a structure similar to that of the tongue.
  • a disadvantage of such a solution is that it represents an unsatisfactory compromise between the two contradictory constraints of maintenance and comfort of the foot mentioned above.
  • the solutions of the state of the art do not achieve a satisfactory aesthetics of the shoe.
  • the document FR2644044 presents a solution in which the foam material of the structure of the liner has a constant thickness but whose density is variable from one area to another. This makes it possible to optimize the effectiveness of the liner by providing more flexible areas of lesser density, where comfort is particularly sought after and more rigid areas of higher density, in areas where the maintenance of the foot is particularly sought after. .
  • This solution as described has a complex manufacturing process and is not satisfactory.
  • closed cell foams used in slippers
  • open cell foams there are two families with different properties, known as closed cell foams and open cell foams.
  • the first category of closed cell foams is in a more rigid form, which has a disadvantage in terms of comfort, but makes it easy to obtain forms by hot stamping on its surface.
  • the second category of open cell foams is in a softer form which has the additional feature of allowing air to flow into the material.
  • such a material is described as breathable because it removes sweat from the foot and lower leg positioned in the liner, which allows a significant advantage in terms of comfort.
  • these foams can not be shaped into satisfactorily by the processes used with closed foams, which represents an obstacle to their use.
  • the present invention has the main object of providing a sports shoe structure to achieve an improved compromise between the constraints of comfort and rigidity mentioned above.
  • a first object of the present invention to provide a solution that improves the user's comfort of a sports shoe based breathable material, while ensuring a good foot maintenance.
  • a second object of the present invention is to provide a sports shoe with an attractive aesthetic.
  • a third object of the present invention is to provide a sports shoe whose manufacturing process is interesting economically.
  • the sports shoe has a structure comprising an open cell monolithic foam element, this foam preferably coming into almost direct contact with the user's foot, and this foam comprising more than two layers different, of different densities, to form areas of different stiffness and offer a multitude of possible combinations of comfort / stiffness parameter.
  • Monolithic foam is understood to mean an integral foam obtained from a single base material.
  • the invention is particularly adapted to an application for forming at least a portion of the inner layer of a ski boot, coming into immediate contact with the foot or the lower leg of the user, but also to form any element of comfort of the wall of a shoe.
  • the concept of the invention is illustrated in the context of a portion of the inner face of a boot 10 for ski boots, covering the tongue 11 and malleoli 12.
  • this concept could be implemented on any other shoe sportswear, especially the uprights coming into contact with the shin of the user.
  • this concept could be implemented on surfing shoes, hiking, skating ... It could also affect the entire inner surface of these shoes.
  • the sports boot tongue 11 has an outer face obtained by a layer of rigid material 13 as in the state of the art, and an inner face 14 intended to bear on the foot and shin of a user.
  • the invention relates to a comfort element 1 of the wall of the liner 10.
  • this comfort element 1 is used to form the inner face 14 of the shoe.
  • This element 1 is in several layers, an example of which is detailed with reference to the figure 4 .
  • this element mainly comprises a foam 2.
  • the foam 2 is an open-cell foam based on a very flexible material, for example a polyurethane with a density of less than or equal to 100 kg / m 3 .
  • the comfort element whose foam 2 comprises at least three different thicknesses, each thickness corresponding to a different density and therefore having a different flexibility. It finally reaches a relief shape with different areas of rigidity.
  • the comfort element 1 comprises first zones 3, the largest thickness of which is approximately 15 millimeters thick, second zones 4 approximately 11 millimeters thick and third zones 5 approximately 7 millimeters thick. millimeters thick.
  • the second and third zones 4, 5 are obtained from an intermediate foam element or blank, of constant and uniform thickness, equal to 15 millimeters, which is compressed by a press under certain conditions of pressure and temperature to form at least two zones 4, 5 compressed of different thickness and density. The manufacturing process will be detailed later.
  • the compressed zones 4, 5 obtain a lower thickness, a higher density and therefore a greater rigidity with respect to the zones 3.
  • the comfort element 1 comprises a first elongate zone 6 intended to cover the inner face of a tongue 11 of ski boot liner 10, and two lateral portions 7 intended to cover the inner face of the liner at the level of the malleolus 12.
  • This solution allows to privilege the comfort at the level of the malleoli, which are particularly likely to be struck. It also makes it possible to favor the comfort at the level of the shin of the skier, by the presence of numerous relatively thick areas 4. This solution also helps to maintain the skier's leg by the more rigid areas 5 including.
  • these rigid zones 5 are in the form of narrow narrow strips 8 of thin thickness separating thicker and more flexible zones, and correspond to natural zones of folding of the foam 2 in the liner, which are both permanent folding zones, necessary to marry the shape of the slipper, and dynamic folding zones, necessary during the practice of skiing.
  • These strips 8 thus promote these folds and ensure a good geometry of the foam 2 around the foot and the lower leg of the skier and thus participate in the good support of the foot and the good behavior of the liner in a direction perpendicular to the folding strips
  • the figure 3 illustrates another example of a comfort element 1 with foam 2 'intended to cover the inner face of a liner tongue, comprising first zones 3' the thickest, second zones 4 'of intermediate thickness and thirds 5 'areas the least thick.
  • the invention also relates to the method of manufacturing a slipper or a sports shoe.
  • a flat foam intermediate element which we will call plane blank, of constant thickness, is used.
  • This blank then undergoes a compression step to form at least two compressed zones 4, 5, of different thicknesses, in which the foam 2 has a greater rigidity, while maintaining uncompressed areas.
  • it can be compressed over its entire surface so as to form at least three zones of different thickness.
  • this flat blank corresponds to a large surface of the sports shoe, which makes it possible to easily make the wall of the shoe from a single element covering a large area.
  • Such a method makes it possible to obtain a good maintenance of the compressed zones in their compressed form.
  • Advantageous conditions are to choose a mold heating temperature between 140 and 150 degrees C and a cooling between -10 and -20 degrees C.
  • the manufacturing method comprises a step of bonding and shaping the compressed plane blank forming the comfort element 1 on the inner face of the liner 10 and / or the sports shoe by any known means, a seam , a collage, a welding ...
  • the figure 4 illustrates more precisely the possible structure of the element of the invention, in section IV-IV of the compressed blank 1 of the figure 2 which is actually in the form of a single layer of foam 2 held by two thin layers of fabric on either side, for example an outer layer 15 of a mixture of 80% polyamide and 20% polyamide. % of an elastomer and an inner fabric 16.
  • the thickness of the layers 15, 16 is intentionally exaggerated for reasons of clarity of the figure.
  • These fabrics have a bi-elastic property to adapt to the reliefs of the intermediate foam 2 and follow its shape. They are optional and have a function of maintaining the foam and possibly an additional comfort function by providing a pleasant feeling to the touch, especially for the inner layer 16.
  • the foam is the most essential layer to fulfill the function of comfort. It is it that is shaped by the compression process.
  • a single comfort element with a single layer of foam 2 has been illustrated in the preceding examples, which has adopted a relief shape as described above from a homogeneous foam blank.
  • several comfort elements according to the invention comprising one or more layers of foam, may be superposed or juxtaposed on the surface of a shoe part.
  • such a comfort element according to the invention remains compatible with a combined use with the conventional comfort elements of the state of the art.
  • the concept of the invention is implemented as soon as a comfort element comprises at least one open-cell monolithic foam layer having reliefs at different densities.
  • the comfort element according to the invention was advantageously positioned on the inner surface of the shoe, visible from the outside and intended to come into contact with the foot and / or the lower leg of the foot. the user. This positioning allows the shoe to present an interior wall with an attractive aesthetic.
  • the comfort element could be positioned at another level of the thickness of the shoe while allowing to effectively meet the requirements of comfort and stiffness.
  • it can be integrated within the thickness of the wall of the shoe as a layer of padding. In such an implementation, it will include a much larger thickness, for example between two and three centimeters.
  • Such a comfort element is particularly suitable for athletic shoe slippers which include rigid outer rods, such as sports shoes, for which the achievement of comfort is a particularly difficult technical problem to solve. However, it can also advantageously be used in other sports shoes.

Abstract

The element has an open cell polyurethane foam layer (2) with zones (3 - 5) having different thickness and densities, where the foam layer is monolithic. The foam layer has a decoration formed through one of the two zones (4, 5). The foam layer is provided between external and internal tissue layers (15, 16). The zone (3) has rigidity higher than rigidity of other zones (4, 5). An independent claim is also included for a method for manufacturing a comfort element for a part of a sport shoe.

Description

L'invention concerne un élément de confort pour chaussure de sport, tout ou partie d'une chaussure de sport incorporant un tel élément de confort, et notamment un chausson pour chaussure de ski et la chaussure de ski associée. Elle est particulièrement adaptée à une application sur la languette du chausson de la chaussure de ski. Elle concerne aussi un procédé de fabrication d'un élément de confort d'une telle chaussure.The invention relates to a comfort element for sports shoes, all or part of a sports shoe incorporating such a comfort element, and in particular a boot for a ski boot and the associated ski boot. It is particularly suitable for application on the tongue of the boot of the ski boot. It also relates to a method of manufacturing a comfort element of such a shoe.

Selon l'art antérieur, une chaussure de ski se compose d'une tige rigide entourant un chausson de confort dans lequel le skieur glisse son pied. Un tel chausson comprend une languette dans sa partie antérieure, qui peut s'écarter sous la pression du pied à travers une échancrure de la tige de chaussure pour faciliter le chaussage et le déchaussage de la chaussure. Ce chausson remplit des fonctions contradictoires. Il doit assurer un bon maintien du pied pour obtenir un guidage efficace du ski, ce qui requiert une structure rigide, tout en assurant un confort au skieur, ce qui requiert une structure souple pour amoindrir les effets inconfortables de la tige rigide entourant le chausson. Le chausson doit également avantageusement produire une première sensation douillette et agréable au moment du chaussage car l'utilisateur y est très sensible.According to the prior art, a ski boot consists of a rigid rod surrounding a comfort boot in which the skier slides his foot. Such a liner comprises a tab in its front part, which can deviate under the pressure of the foot through a notch of the shoe upper to facilitate the boot and the heaving of the shoe. This slipper fulfills contradictory functions. It must ensure a good support for the foot to obtain an effective guide of the ski, which requires a rigid structure, while providing comfort to the skier, which requires a flexible structure to lessen the uncomfortable effects of the rigid rod surrounding the liner. The liner should also advantageously produce a first feeling cozy and pleasant when donning because the user is very sensitive.

Le document EP0370948 illustre une construction classique d'un chausson de l'état de la technique, dans lequel, pour limiter les points douloureux au niveau du tibia, la languette comprend une structure en plusieurs couches comprenant une couche extérieure en matériau rigide pour répondre à l'exigence de maintien du chausson, une couche de mousse qui amortit les chocs exercés sur le tibia, recouverte sur la face intérieure de la languette d'un tissu qui protège la mousse d'une usure rapide suite aux nombreux frottements contre la jambe du skieur et qui lui évite de plus des contacts directs avec la neige. Ce tissu permet en outre d'assurer une esthétique attrayante de la languette. Le reste du chausson présente une structure similaire à celle de la languette. Un inconvénient d'une telle solution est qu'elle représente un compromis insatisfaisant entre les deux contraintes contradictoires de maintien et de confort du pied rappelées ci-dessus. De plus, les solutions de l'état de la technique ne permettent pas d'atteindre une esthétique satisfaisante du chausson.The document EP0370948 illustrates a conventional construction of a slipper of the state of the art, wherein, to limit the pain points in the tibia, the tongue comprises a multilayer structure comprising an outer layer of rigid material to meet the requirement for maintaining the liner, a layer of foam that dampens the shocks exerted on the shin, covered on the inside of the tongue with a fabric that protects the foam from rapid wear as a result of the numerous friction against the skier's leg, and it also avoids direct contact with the snow. This fabric also allows to ensure an attractive aesthetic of the tongue. The rest of the shoe has a structure similar to that of the tongue. A disadvantage of such a solution is that it represents an unsatisfactory compromise between the two contradictory constraints of maintenance and comfort of the foot mentioned above. In addition, the solutions of the state of the art do not achieve a satisfactory aesthetics of the shoe.

Le document FR2644044 présente une solution dans laquelle le matériau en mousse de la structure du chausson a une épaisseur constante mais dont la densité est variable d'une zone à l'autre. Cela permet d'optimiser l'efficacité du chausson en prévoyant des zones plus souples, de moindre densité, là où le confort est particulièrement recherché et des zones plus rigides, de plus forte densité, dans des zones où le maintien du pied est particulièrement recherché. Cette solution telle que décrite présente toutefois un procédé de fabrication complexe et n'est pas satisfaisante.The document FR2644044 presents a solution in which the foam material of the structure of the liner has a constant thickness but whose density is variable from one area to another. This makes it possible to optimize the effectiveness of the liner by providing more flexible areas of lesser density, where comfort is particularly sought after and more rigid areas of higher density, in areas where the maintenance of the foot is particularly sought after. . This solution as described, however, has a complex manufacturing process and is not satisfactory.

Concernant plus particulièrement les mousses utilisées dans les chaussons, il existe deux familles aux propriétés différentes, connues sous les dénominations de mousses à cellules fermées et mousses à cellules ouvertes. La première catégorie de mousses à cellules fermées se présente sous une forme plus rigide, ce qui présente un inconvénient en terme de confort, mais permet d'obtenir facilement des formes par emboutissage à chaud sur sa surface. La seconde catégorie de mousses à cellules ouvertes se présente sous une forme plus souple qui présente la particularité supplémentaire de permettre la circulation d'air dans le matériau. Généralement, un tel matériau est qualifié de respirant car il permet d'évacuer la transpiration du pied et du bas de jambe positionnés dans le chausson, ce qui permet un avantage important en terme de confort. Toutefois, ces mousses ne peuvent pas être mises en forme de manière satisfaisante par les procédés utilisés avec les mousses fermées, ce qui représente un obstacle à leur utilisation.With particular regard to foams used in slippers, there are two families with different properties, known as closed cell foams and open cell foams. The first category of closed cell foams is in a more rigid form, which has a disadvantage in terms of comfort, but makes it easy to obtain forms by hot stamping on its surface. The second category of open cell foams is in a softer form which has the additional feature of allowing air to flow into the material. Generally, such a material is described as breathable because it removes sweat from the foot and lower leg positioned in the liner, which allows a significant advantage in terms of comfort. However, these foams can not be shaped into satisfactorily by the processes used with closed foams, which represents an obstacle to their use.

La présente invention a pour objet principal de proposer une structure de chaussure de sport permettant d'atteindre un compromis amélioré entre les contraintes de confort et de rigidité mentionnées ci-dessus.The present invention has the main object of providing a sports shoe structure to achieve an improved compromise between the constraints of comfort and rigidity mentioned above.

Plus précisément, un premier objet de la présente invention consiste à proposer une solution qui améliore le confort de l'utilisateur d'une chaussure de sport à base de matériau respirant, tout en garantissant un bon maintien du pied.More specifically, a first object of the present invention to provide a solution that improves the user's comfort of a sports shoe based breathable material, while ensuring a good foot maintenance.

Un second objet de la présente invention consiste à proposer une chaussure de sport présentant une esthétique attrayante.A second object of the present invention is to provide a sports shoe with an attractive aesthetic.

Un troisième objet de la présente invention consiste à proposer une chaussure de sport dont le procédé de fabrication est intéressant sur le plan économique.A third object of the present invention is to provide a sports shoe whose manufacturing process is interesting economically.

Selon le concept de l'invention, la chaussure de sport présente une structure comprenant un élément en mousse monolithique à cellules ouvertes, cette mousse venant préférablement en contact quasi-direct avec le pied de l'utilisateur, et cette mousse comprenant plus de deux épaisseurs différentes, de densités différentes, pour former des zones de rigidité différente et offrir une multitude de combinaisons possibles du paramètre confort/rigidité.According to the concept of the invention, the sports shoe has a structure comprising an open cell monolithic foam element, this foam preferably coming into almost direct contact with the user's foot, and this foam comprising more than two layers different, of different densities, to form areas of different stiffness and offer a multitude of possible combinations of comfort / stiffness parameter.

On entend par mousse monolithique une mousse d'un seul tenant, obtenue par un seul matériau de base.Monolithic foam is understood to mean an integral foam obtained from a single base material.

L'invention est particulièrement adaptée à une application pour former au moins une partie de la couche intérieure d'un chausson de ski, venant en contact immédiat avec le pied ou le bas de jambe de l'utilisateur, mais aussi pour former tout élément de confort de la paroi d'une chaussure.The invention is particularly adapted to an application for forming at least a portion of the inner layer of a ski boot, coming into immediate contact with the foot or the lower leg of the user, but also to form any element of comfort of the wall of a shoe.

L'invention est plus précisément définie par les revendications.The invention is more precisely defined by the claims.

Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante d'un mode d'exécution particulier fait à titre non-limitatif en relation avec les figures jointes parmi lesquelles.

  • La figure 1 est une vue en perspective de dessus d'un chausson de chaussure de ski selon un mode d'implémentation de l'invention ;
  • la figure 2 est une vue de face d'un élément de confort à plat selon le mode d'implémentation de l'invention ;
  • la figure 3 est une vue de face d'un élément de confort à plat selon une variante du mode d'implémentation de l'invention ;
  • la figure 4 est une vue en coupe de la structure de l'épaisseur de l'élément de confort selon le mode d'implémentation de l'invention.
These objects, features and advantages of the present invention will be set forth in detail in the following description of a particular embodiment made in a non-limiting manner in relation to the attached figures among which.
  • The figure 1 is a perspective view from above of a ski boot liner according to an embodiment of the invention;
  • the figure 2 is a front view of a flat comfort element according to the embodiment of the invention;
  • the figure 3 is a front view of a flat comfort element according to a variant of the embodiment of the invention;
  • the figure 4 is a sectional view of the structure of the thickness of the comfort element according to the embodiment of the invention.

Sur les figures 1 et 2, le concept de l'invention est illustré dans le cadre d'une partie de la face intérieure d'un chausson 10 pour chaussure de ski, couvrant la languette 11 et les malléoles 12. Toutefois, ce concept pourrait être implémenté sur toute autre chaussure de sport, notamment les chaussures montantes venant en contact avec le tibia de l'utilisateur. Par exemple, ce concept pourrait être mis en oeuvre sur des chaussures de surf, de randonnée, de patinage...II pourrait de plus concerner toute la surface intérieure de ces chaussures.On the figures 1 and 2 , the concept of the invention is illustrated in the context of a portion of the inner face of a boot 10 for ski boots, covering the tongue 11 and malleoli 12. However, this concept could be implemented on any other shoe sportswear, especially the uprights coming into contact with the shin of the user. For example, this concept could be implemented on surfing shoes, hiking, skating ... It could also affect the entire inner surface of these shoes.

Selon le mode d'exécution de l'invention représenté sur la figure 1, la languette de chaussure de sport 11 présente une face extérieure obtenue par une couche en matériau rigide 13 comme dans l'état de la technique, et une face intérieure 14 destinée à venir en appui sur le pied et le tibia d'un utilisateur. L'invention porte sur un élément de confort 1 de la paroi du chausson 10.According to the embodiment of the invention shown in the figure 1 , the sports boot tongue 11 has an outer face obtained by a layer of rigid material 13 as in the state of the art, and an inner face 14 intended to bear on the foot and shin of a user. The invention relates to a comfort element 1 of the wall of the liner 10.

Dans ce mode d'exécution, cet élément de confort 1 est utilisé pour former la face intérieure 14 de la chaussure. Cet élément 1 se présente en plusieurs couches dont un exemple est détaillé en référence avec la figure 4. Toutefois, cet élément comprend principalement une mousse 2.In this embodiment, this comfort element 1 is used to form the inner face 14 of the shoe. This element 1 is in several layers, an example of which is detailed with reference to the figure 4 . However, this element mainly comprises a foam 2.

Selon un premier principe de l'invention, la mousse 2 est une mousse à cellules ouvertes, à base d'un matériau très souple, par exemple un polyuréthane de densité inférieure ou égale à 100 kg/m3. Selon le second principe de l'invention, l'élément de confort dont sa mousse 2 comprend au moins trois épaisseurs différentes, chaque épaisseur correspondant à une densité différente et donc présentant une souplesse différente. Il atteint finalement une forme en reliefs présentant des zones de rigidité différentes.According to a first principle of the invention, the foam 2 is an open-cell foam based on a very flexible material, for example a polyurethane with a density of less than or equal to 100 kg / m 3 . According to the second principle of the invention, the comfort element whose foam 2 comprises at least three different thicknesses, each thickness corresponding to a different density and therefore having a different flexibility. It finally reaches a relief shape with different areas of rigidity.

Comme cela est notamment plus particulièrement visible sur la figure 2, l'élément de confort 1 comprend des premières zones 3 dont l'épaisseur la plus importante, d'environ 15 millimètres d'épaisseur, des secondes zones 4 d'environ 11 millimètres d'épaisseur et des troisièmes zones 5 d'environ 7 millimètres d'épaisseur. Les seconde et troisième zones 4, 5 sont obtenues à partir d'un élément de mousse intermédiaire ou ébauche, d'épaisseur constante et uniforme, égale à 15 millimètres, qui est comprimé par une presse sous certaines conditions de pression et température permettant de former au moins deux zones 4, 5 comprimées d'épaisseur et de densité différentes. Le procédé de fabrication sera détaillé par la suite. Ainsi, les zones comprimées 4, 5 obtiennent une épaisseur inférieure, une densité supérieure et donc une rigidité supérieure par rapport aux zones 3.As this is particularly particularly visible on the figure 2 the comfort element 1 comprises first zones 3, the largest thickness of which is approximately 15 millimeters thick, second zones 4 approximately 11 millimeters thick and third zones 5 approximately 7 millimeters thick. millimeters thick. The second and third zones 4, 5 are obtained from an intermediate foam element or blank, of constant and uniform thickness, equal to 15 millimeters, which is compressed by a press under certain conditions of pressure and temperature to form at least two zones 4, 5 compressed of different thickness and density. The manufacturing process will be detailed later. Thus, the compressed zones 4, 5 obtain a lower thickness, a higher density and therefore a greater rigidity with respect to the zones 3.

Plus précisément, l'élément de confort 1 comprend une première zone allongée 6 destinée à recouvrir la face intérieure d'une languette 11 de chausson 10 de chaussure de ski, et deux parties latérales 7 destinées à recouvrir la face intérieure du chausson au niveau des malléoles 12. Cette solution permet de privilégier le confort au niveau des malléoles, qui sont particulièrement susceptibles d'être heurtées. Elle permet aussi de privilégier le confort au niveau du tibia du skieur, par la présence de nombreuses zones 4 relativement épaisses. Cette solution permet de plus de favoriser le maintien de la jambe du skieur par les zones 5 plus rigides notamment. Certaines de ces zones rigides 5 se présentent sous la forme de bandes rigides étroites 8 de faible épaisseur départageant des zones plus épaisses et plus souples, et correspondent à des zones naturelles de pliage de la mousse 2 dans le chausson, qui sont à la fois des zones de pliage permanent, nécessaires pour épouser la forme du chausson, et des zones de pliage dynamique, nécessaires lors de la pratique du ski. Ces bandes 8 favorisent ainsi ces pliages et garantissent une bonne géométrie de la mousse 2 autour du pied et du bas de jambe du skieur et participent ainsi au bon maintien du pied et à la bonne tenue du chausson dans une direction perpendiculaire aux bandes de pliageMore specifically, the comfort element 1 comprises a first elongate zone 6 intended to cover the inner face of a tongue 11 of ski boot liner 10, and two lateral portions 7 intended to cover the inner face of the liner at the level of the malleolus 12. This solution allows to privilege the comfort at the level of the malleoli, which are particularly likely to be struck. It also makes it possible to favor the comfort at the level of the shin of the skier, by the presence of numerous relatively thick areas 4. This solution also helps to maintain the skier's leg by the more rigid areas 5 including. Some of these rigid zones 5 are in the form of narrow narrow strips 8 of thin thickness separating thicker and more flexible zones, and correspond to natural zones of folding of the foam 2 in the liner, which are both permanent folding zones, necessary to marry the shape of the slipper, and dynamic folding zones, necessary during the practice of skiing. These strips 8 thus promote these folds and ensure a good geometry of the foam 2 around the foot and the lower leg of the skier and thus participate in the good support of the foot and the good behavior of the liner in a direction perpendicular to the folding strips

La figure 3 illustre un autre exemple d'un élément de confort 1 à mousse 2' destiné à recouvrir la face intérieure d'une languette de chausson, comprenant des premières zones 3' les plus épaisses, des secondes zones 4' d'épaisseur intermédiaire et des troisièmes zones 5' les moins épaisses.The figure 3 illustrates another example of a comfort element 1 with foam 2 'intended to cover the inner face of a liner tongue, comprising first zones 3' the thickest, second zones 4 'of intermediate thickness and thirds 5 'areas the least thick.

Toute autre géométrie de ces différentes épaisseurs de l'élément de confort est possible sans sortir du cadre de la présente invention. Il est toutefois admis qu'au moins trois épaisseurs différentes sont nécessaires pour obtenir une forme en reliefs suffisants pour répondre efficacement aux contraintes des chaussures de sport. Cette solution permet ainsi aussi facilement de réaliser des marquages, des dessins, plus généralement des décorations 9, 9', sur les parties visibles de la chaussure, dont la fonction est d'apporter un aspect esthétique attrayant.Any other geometry of these different thicknesses of the comfort element is possible without departing from the scope of the present invention. It is however admitted that at least three different thicknesses are necessary to obtain a relief shape sufficient to effectively meet the constraints of sports shoes. This solution thus also makes it easy to carry out markings, drawings, more generally decorations 9, 9 ', on the visible parts of the shoe, the function of which is to bring an attractive aesthetic appearance.

L'invention porte aussi sur le procédé de fabrication d'un chausson ou d'une chaussure de sport. Pour cela, un élément intermédiaire plat en mousse, que nous appellerons ébauche plane, d'épaisseur constante, est utilisé. Cette ébauche subie ensuite une étape de compression pour former au moins deux zones comprimées 4, 5, d'épaisseurs différentes, dans lesquelles la mousse 2 présente une plus grande rigidité, tout en conservant des zones non comprimées. En variante, elle peut subir une compression sur toute sa surface de manière à former au moins trois zones d'épaisseur différente. Avantageusement, cette ébauche plane correspond à une surface importante de la chaussure de sport, ce qui permet de réaliser facilement la paroi de la chaussure à partir d'un seul élément couvrant une surface importante.The invention also relates to the method of manufacturing a slipper or a sports shoe. For this, a flat foam intermediate element, which we will call plane blank, of constant thickness, is used. This blank then undergoes a compression step to form at least two compressed zones 4, 5, of different thicknesses, in which the foam 2 has a greater rigidity, while maintaining uncompressed areas. Alternatively, it can be compressed over its entire surface so as to form at least three zones of different thickness. Advantageously, this flat blank corresponds to a large surface of the sports shoe, which makes it possible to easily make the wall of the shoe from a single element covering a large area.

L'étape de compression peut être réalisée par les étapes suivantes :

  • chauffage d'un moule de compression ;
  • application du moule de compression chauffé sur l'ébauche plane pour la comprimer dans les zones choisies ; en remarque, l'ordre des deux étapes précédentes n'a pas d'importance et elles peuvent être inversées ;
  • refroidissement brutal du moule de compression puis ouverture du moule.
The compression step can be performed by the following steps:
  • heating a compression mold;
  • applying the heated compression mold to the flat blank to compress it in the selected areas; as noted, the order of the two preceding steps does not matter and they can be reversed;
  • brutal cooling of the compression mold and opening of the mold.

Un tel procédé permet d'obtenir un bon maintien des zones comprimées dans leur forme telle que comprimée. Des conditions avantageuses consistent à choisir une température de chauffage du moule entre 140 et 150 degrés C et un refroidissement entre -10 et -20 degrés C.Such a method makes it possible to obtain a good maintenance of the compressed zones in their compressed form. Advantageous conditions are to choose a mold heating temperature between 140 and 150 degrees C and a cooling between -10 and -20 degrees C.

Ensuite, le procédé de fabrication comprend une étape de liaison et mise en forme de l'ébauche plane comprimée formant l'élément de confort 1 sur la face intérieure du chausson 10 et/ou de la chaussure de sport par tout moyen connu, une couture, un collage, une soudure...Then, the manufacturing method comprises a step of bonding and shaping the compressed plane blank forming the comfort element 1 on the inner face of the liner 10 and / or the sports shoe by any known means, a seam , a collage, a welding ...

La figure 4 illustre plus précisément la structure possible de l'élément de l'invention, en coupe IV-IV de l'ébauche comprimée 1 de la figure 2, qui se présente en réalité sous la forme d'une seule couche de mousse 2 maintenue par deux fines épaisseurs de tissu de part et d'autre, par exemple une couche extérieure 15 d'un mélange composé de 80% de polyamide et de 20% d'un élastomère et un tissu intérieur 16. Sur la figure 4, l'épaisseur des couches 15, 16 est volontairement exagérée pour des raisons de clarté de la figure. Ces tissus possèdent une propriété bi-élastique pour s'adapter aux reliefs de la mousse 2 intermédiaire et suivre sa forme. Ils sont optionnels et ont une fonction de maintien de la mousse et éventuellement une fonction de confort supplémentaire en offrant une sensation agréable au toucher, notamment pour la couche intérieure 16. La mousse représente la couche la plus essentielle pour remplir la fonction de confort. C'est elle qui est mise en forme par le procédé de compression.The figure 4 illustrates more precisely the possible structure of the element of the invention, in section IV-IV of the compressed blank 1 of the figure 2 which is actually in the form of a single layer of foam 2 held by two thin layers of fabric on either side, for example an outer layer 15 of a mixture of 80% polyamide and 20% polyamide. % of an elastomer and an inner fabric 16. On the figure 4 the thickness of the layers 15, 16 is intentionally exaggerated for reasons of clarity of the figure. These fabrics have a bi-elastic property to adapt to the reliefs of the intermediate foam 2 and follow its shape. They are optional and have a function of maintaining the foam and possibly an additional comfort function by providing a pleasant feeling to the touch, especially for the inner layer 16. The foam is the most essential layer to fulfill the function of comfort. It is it that is shaped by the compression process.

En remarque, un seul élément de confort avec une seule couche de mousse 2 a été illustré dans les exemples précédents, qui a adopté une forme en relief telle que décrite précédemment à partir d'une ébauche de mousse homogène. En remarque, plusieurs éléments de confort selon l'invention, comprenant une ou plusieurs couches de mousse, peuvent être superposés ou juxtaposés sur la surface d'une partie de chaussure. De plus, un tel élément de confort selon l'invention reste compatible avec une utilisation combinée avec les éléments de confort conventionnels de l'état de la technique. Finalement, le concept de l'invention est mis en oeuvre dès lors qu'un élément de confort comprend au moins une couche de mousse monolithique à cellules ouvertes présentant des reliefs aux densités différentes.As a remark, a single comfort element with a single layer of foam 2 has been illustrated in the preceding examples, which has adopted a relief shape as described above from a homogeneous foam blank. As a remark, several comfort elements according to the invention, comprising one or more layers of foam, may be superposed or juxtaposed on the surface of a shoe part. In addition, such a comfort element according to the invention remains compatible with a combined use with the conventional comfort elements of the state of the art. Finally, the concept of the invention is implemented as soon as a comfort element comprises at least one open-cell monolithic foam layer having reliefs at different densities.

Dans l'exemple précédemment décrit, l'élément de confort selon l'invention a été avantageusement positionné sur la surface intérieure de la chaussure, visible depuis l'extérieur et destinée à venir en contact avec le pied et/ou le bas de jambe de l'utilisateur. Ce positionnement permet à la chaussure de présenter une paroi intérieure avec une esthétique attrayante.In the example described above, the comfort element according to the invention was advantageously positioned on the inner surface of the shoe, visible from the outside and intended to come into contact with the foot and / or the lower leg of the foot. the user. This positioning allows the shoe to present an interior wall with an attractive aesthetic.

Toutefois, l'élément de confort pourrait être positionné à un autre niveau de l'épaisseur de la chaussure tout en permettant de répondre efficacement aux exigences de confort et de rigidité. Par exemple, il peut être intégré au sein de l'épaisseur de la paroi de la chaussure comme une couche de rembourrage. Dans une telle implémentation, il comprendra une épaisseur beaucoup plus importante, par exemple entre deux et trois centimètres.However, the comfort element could be positioned at another level of the thickness of the shoe while allowing to effectively meet the requirements of comfort and stiffness. For example, it can be integrated within the thickness of the wall of the shoe as a layer of padding. In such an implementation, it will include a much larger thickness, for example between two and three centimeters.

Un tel élément de confort est particulièrement adapté aux chaussons de chaussure de sport qui comprennent des tiges extérieures rigides, comme les chaussures de sport, pour lesquelles l'atteinte du confort représente un problème technique particulièrement délicat à résoudre. Toutefois, il peut aussi avantageusement être utilisé dans d'autres chaussures de sport.Such a comfort element is particularly suitable for athletic shoe slippers which include rigid outer rods, such as sports shoes, for which the achievement of comfort is a particularly difficult technical problem to solve. However, it can also advantageously be used in other sports shoes.

Finalement, la solution atteint bien les objets recherchés et présente les avantages suivants :

  • la mousse de l'invention présente plusieurs densités différentes et permet de répondre efficacement aux exigences de confort et de maintien de la chaussure de sport ;
  • la mousse permet à la chaussure de laisser respirer le pied de l'utilisateur du fait de sa composition en cellules ouvertes ;
  • l'élément de confort peut permettre d'atteindre une esthétique attrayante de la face intérieure d'une chaussure de sport ;
  • l'élément de confort peut aussi permettre une sensation agréable au toucher de la face intérieure de la chaussure du fait du matériau utilisé, ce qui représente un atout important.
Finally, the solution achieves the desired objects and has the following advantages:
  • the foam of the invention has several different densities and can effectively meet the requirements of comfort and maintenance of the sports shoe;
  • the foam allows the shoe to let the foot of the user breathe because of its composition in open cells;
  • the comfort element can achieve an attractive aesthetic of the inner face of a sports shoe;
  • the comfort element can also allow a pleasant feeling to the touch of the inner face of the shoe due to the material used, which is an important asset.

Claims (15)

Elément de confort pour chaussure de sport, comprenant au moins une couche de mousse (2, 2') à cellules ouvertes caractérisé en ce que la au moins une couche de mousse (2, 2') comprend au moins trois zones (3, 4, 5 ; 3', 4', 5') d'épaisseurs différentes et de densités différentes.Comfort element for sports shoes, comprising at least one layer of open cell foam (2, 2 ') characterized in that the at least one layer of foam (2, 2') comprises at least three zones (3, 4). , 5; 3 ', 4', 5 ') of different thicknesses and densities. Elément de confort pour chaussure de sport selon la revendication 1, caractérisé en ce que la mousse (2, 2') présente dans ses zones (3, 3') les plus épaisses une souplesse équivalente à celle d'une mousse de polyuréthane de densité inférieure ou égale à 100 kg/m3.Comfort element for sports shoes according to claim 1, characterized in that the foam (2, 2 ') has in its zones (3, 3') the thickest a flexibility equivalent to that of a density polyurethane foam less than or equal to 100 kg / m 3 . Elément de confort pour chaussure de sport selon la revendication 2, caractérisé en ce que la mousse (2, 2') est une mousse de polyuréthane.Comfort element for sports shoes according to claim 2, characterized in that the foam (2, 2 ') is a polyurethane foam. Elément de confort pour chaussure de sport selon la revendication 1 ou 2 ou 3, caractérisé en ce qu'il comprend une seule couche de mousse (2, 2') monolithique.Comfort element for sports shoes according to claim 1 or 2 or 3, characterized in that it comprises a single monolithic layer of foam (2, 2 '). Elément de confort pour chaussure de sport selon l'une des revendications précédentes, caractérisé en ce que la au moins une couche de mousse (2, 2') comprend une décoration (9, 9') formée par la forme d'une de ses zones comprimées (4, 5 ; 4', 5').Comfort element for sports shoes according to one of the preceding claims, characterized in that the at least one layer of foam (2, 2 ') comprises a decoration (9, 9') formed by the shape of one of its compressed areas (4, 5, 4 ', 5'). Elément de confort pour chaussure de sport selon l'une des revendications précédentes, caractérisé en ce qu'il comprend une couche de mousse (2, 2') disposée entre deux couches de tissu (15, 16).Comfort element for sports shoes according to one of the preceding claims, characterized in that it comprises a layer of foam (2, 2 ') disposed between two layers of fabric (15, 16). Partie de chaussure de sport comprenant un élément de confort (1, 1') selon l'une des revendications précédentes, caractérisée en ce que l'élément de confort est positionné sur la face intérieure (14) de la partie de chaussure destinée à venir en contact avec le pied et/ou le bas de jambe de l'utilisateur.Sports shoe part comprising a comfort element (1, 1 ') according to one of the preceding claims, characterized in that the comfort element is positioned on the inner face (14) of the shoe part intended to come in contact with the user's foot and / or lower leg. Partie de chaussure de sport comprenant un élément de confort (1, 1') selon l'une des revendications 1 à 6, caractérisée en ce que l'élément de confort forme une couche de rembourrage positionnée à l'intérieur de la paroi de la partie de chaussure.A sports shoe part comprising a comfort element (1, 1 ') according to one of claims 1 to 6, characterized in that the comfort element forms a cushioning layer positioned inside the wall of the shoe part. Partie de chaussure de sport selon la revendication 7 ou 8, caractérisée en ce que la au moins une couche de mousse (2) de l'élément de confort (1) présente une zone (3) de plus grande épaisseur au niveau de la malléole.Sports shoe part according to claim 7 or 8, characterized in that the at least one layer of foam (2) of the comfort element (1) has a zone (3) of greater thickness at the level of the malleolus . Partie de chaussure de sport selon l'une des revendications 7 à 9, caractérisée en ce que la au moins une couche de mousse (2, 2') comprend des bandes (8, 8') étroites parmi ses zones comprimées (4, 5 ; 4', 5') qui représentent des zones de pliage.Sports shoe part according to one of claims 7 to 9, characterized in that the at least one layer of foam (2, 2 ') comprises narrow strips (8, 8') of its compressed areas (4, 5 4 ', 5') which represent folding areas. Partie de chaussure de sport selon l'une des revendications précédentes, caractérisée en ce que la partie de chaussure est un chausson (10) de chaussure de ski comprenant une languette (11) comprenant ledit élément de confort (1, 1').Sports shoe part according to one of the preceding claims, characterized in that the shoe part is a ski boot (10) comprising a tongue (11) comprising said comfort element (1, 1 '). Chaussure de sport comprenant une partie de chaussure de sport selon l'une des revendications 7 à 11.Sports shoe comprising a sports boot part according to one of claims 7 to 11. Procédé de fabrication d'un élément de confort pour une partie de chaussure de sport, caractérisé en ce qu'il comprend une étape de préparation d'une ébauche plane comprenant au moins une couche de mousse à cellules ouvertes d'épaisseur constante, une étape de compression à au moins deux niveaux différents de l'ébauche plane pour obtenir une ébauche plane comprimée (1, 1') comprenant au moins trois zones (3, 4, 5 ; 3', 4', 5') d'épaisseurs différentes et de densités différentes.A method of manufacturing a comfort element for a sports shoe part, characterized in that it comprises a step of preparing a planar blank comprising at least one layer of open-cell foam of constant thickness, a step compressing at least two different levels of the plane blank to obtain a compressed plane blank (1, 1 ') comprising at least three zones (3, 4, 5, 3', 4 ', 5') of different thicknesses and different densities. Procédé de fabrication d'un élément de confort pour une partie de chaussure de sport, selon la revendication précédente, caractérisé en ce que l'étape de compression comprend les étapes suivantes : - chauffage d'un moule de compression et application du moule de compression sur l'ébauche plane, ou inversement, pour la comprimer dans les zones (4, 5 ; 4', 5') choisies ; - refroidissement brutal du moule de compression. A method of manufacturing a comfort element for a sports boot part, according to the preceding claim, characterized in that the compression step comprises the following steps: heating a compression mold and applying the compression mold to the plane blank, or vice versa, to compress it in the zones (4, 5, 4 ', 5') chosen; - Sudden cooling of the compression mold. Procédé de fabrication d'une partie de chaussure de sport, comprenant un procédé de fabrication d'un élément de confort selon la revendication 13 ou 14 et une étape de liaison et mise en forme de l'élément de confort (1, 1') sur le reste de la structure de la partie de chaussure.A method of manufacturing a sports shoe part, comprising a method of manufacturing a comfort element according to claim 13 or 14 and a step of connecting and shaping the comfort element (1, 1 ') on the rest of the structure of the shoe part.
EP07425591A 2007-09-26 2007-09-26 Sports shoe with raised patterns in foam Withdrawn EP2042050A1 (en)

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EP3050454A1 (en) 2015-02-02 2016-08-03 Rossignol Lange S.R.L. Sports-shoe liner
US9468261B2 (en) 2012-12-07 2016-10-18 Nike, Inc. Article with adjustable stiffness tongue
US9474324B2 (en) 2012-12-07 2016-10-25 Nike, Inc. Article of footwear with adjustable stiffness
FR3108242A1 (en) * 2020-03-23 2021-09-24 Rossignol Lange S.R.L. Sliding shoe comprising a shock-absorbing element

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US4385456A (en) * 1981-03-06 1983-05-31 Jean Livernois Preformed lining component for skate boots and the like
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US3787278A (en) * 1970-05-28 1974-01-22 Olin Corp Molded multiple density polyurethane foam
US4385456A (en) * 1981-03-06 1983-05-31 Jean Livernois Preformed lining component for skate boots and the like
EP0370948A1 (en) 1988-11-24 1990-05-30 Lange International S.A. Inner shoe for a ski boot
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9468261B2 (en) 2012-12-07 2016-10-18 Nike, Inc. Article with adjustable stiffness tongue
US9474324B2 (en) 2012-12-07 2016-10-25 Nike, Inc. Article of footwear with adjustable stiffness
US10292456B2 (en) 2012-12-07 2019-05-21 Nike, Inc. Article of footwear with adjustable stiffness
US10905198B2 (en) 2012-12-07 2021-02-02 Nike, Inc. Article of footwear with adjustable stiffness
EP3050454A1 (en) 2015-02-02 2016-08-03 Rossignol Lange S.R.L. Sports-shoe liner
US10244816B2 (en) 2015-02-02 2019-04-02 Rossignol Lange S.R.L. Sports shoe innerboot
FR3108242A1 (en) * 2020-03-23 2021-09-24 Rossignol Lange S.R.L. Sliding shoe comprising a shock-absorbing element
EP3884801A1 (en) * 2020-03-23 2021-09-29 Rossignol Lange S.R.L. Gliding shoe comprising a shock absorber element

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