EP0419317B1 - Protective element for stiletto heel of a shoe - Google Patents
Protective element for stiletto heel of a shoe Download PDFInfo
- Publication number
- EP0419317B1 EP0419317B1 EP19900402478 EP90402478A EP0419317B1 EP 0419317 B1 EP0419317 B1 EP 0419317B1 EP 19900402478 EP19900402478 EP 19900402478 EP 90402478 A EP90402478 A EP 90402478A EP 0419317 B1 EP0419317 B1 EP 0419317B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heel
- head portion
- wear
- element according
- 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.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B21/00—Heels; Top-pieces or top-lifts
- A43B21/02—Heels; Top-pieces or top-lifts characterised by the material
- A43B21/20—Heels; Top-pieces or top-lifts characterised by the material plastics
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B21/00—Heels; Top-pieces or top-lifts
- A43B21/36—Heels; Top-pieces or top-lifts characterised by their attachment; Securing devices for the attaching means
Definitions
- the most well-known type of element consists of a simple block of synthetic plastic material of resistance to wear and appropriate deformation, and which is pressed into the heel of a shoe by means of a fastening element.
- metal such as a dowel, a tenon, a nail, etc ...
- To prevent the head of the metal fastening element from rubbing on the ground during walking it is known to provide in the block wear an appropriate reinforcement intended to receive said head, so that it cannot come into contact with the ground.
- the head of the fastening element is flush with the lower surface thereof, thereby disadvantageously damaging the floor and / or generating nuisance noise.
- the new protective element of the type comprising a means of attachment to the heel or nail, the head of which is embedded in a block or wear plate, composes the characteristics according to claims 1 to 5 which follow the present description.
- the first material must therefore have sufficient hardness and preferably at least equal to 74 Shore D. It is advantageously chosen from plastics capable of being injection molded such as, for example - without limitation - polyamides or polyurethanes reinforced with a filler based on glass or other suitable material.
- the second material is chosen, on the contrary, from flowable and polymerizable plastics so as to produce, in a mold in which the head of the fixing means or nail has been injection molded, a perfect and homogeneous connection between the cast resin and the hard part.
- This second plastic material can, for example, consist of a polyurethane selected for its high resistance to wear and abrasion. Its hardness must be close to 90 Shore A only.
- the fixing means 1, constituted by a splined dowel 2, is provided with an integral head 3 which has been trapped in the hard plastic material 4, advantageously by injection molding. Then, around this molding 4, an "overmolding" 5 was carried out using a polymerizable resin. resulting in a softer and more flexible material with good abrasion resistance. This overmolding 5 constitutes the wear plate proper of the bonbout.
- the punching resistance of the element is provided by a surface of the hard molding 4 equal to that of the wear plate 5.
- a more or less significant part of the hard material 4 comes partially into contact with the ground.
- the narrow extension 5 of the hard part 4 can serve as a wear indicator.
- the imaginary surface of separation or "line of demarcation" between the two plastic materials can be curved, instead of being straight as in FIG. 1 so as to provide a greater thickness of the wear plate 5 on the side of foot attack on the ground.
- the wear indicator 6 in Figure 3 can be shaped differently and be provided in color to form an easily identifiable mark.
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Description
La présente invention a trait au domaine de la chaussure et concerne tout particulièrement un élément de protection anti-dérapant et anti-usure destiné à être fixé à l'extrémité libre du talon d'une chaussure de femme et, spécifiquement, du talon dit "aiguille".The present invention relates to the field of footwear and relates more particularly to a non-slip and anti-wear protective element intended to be fixed to the free end of the heel of a woman's shoe and, specifically, of the heel known as " needle".
On connait déjà, dans le domaine, plusieurs types de tels éléments, souvent désignés par le terme "bonbout". Le type d' élément le plus connu consiste en un simple bloc de matière plastique synthétique de résistance à l'usure et à la déformation appropriée, et qui est enfoncé dans le talon d'une chaussure à l'aide d'un élément de fixation métallique tel qu'une cheville, un tenon, un clou, etc... Pour éviter que la tête de l'élément de fixation métallique ne frotte sur le sol au cours de la marche, il est connu de prévoir dans le bloc d'usure un renforcement approprié destiné à recevoir ladite tête, afin qu'elle ne puisse venir en contact avec le sol. Cependant, dès qu'une certaine usure du bloc a eu lieu, on conçoit que la tête de l' élément de fixation vient affleurer à la surface inférieure de celui-ci, pour ainsi désavantageusement détériorer le sol et/ou engendrer des bruits intempestifs.Several types of such elements are already known in the field, often designated by the term "bonbout". The most well-known type of element consists of a simple block of synthetic plastic material of resistance to wear and appropriate deformation, and which is pressed into the heel of a shoe by means of a fastening element. metal such as a dowel, a tenon, a nail, etc ... To prevent the head of the metal fastening element from rubbing on the ground during walking, it is known to provide in the block wear an appropriate reinforcement intended to receive said head, so that it cannot come into contact with the ground. However, as soon as a certain wear of the block has taken place, it is understood that the head of the fastening element is flush with the lower surface thereof, thereby disadvantageously damaging the floor and / or generating nuisance noise.
Pour pallier cet inconvénient, on a prévu de noyer la tête du clou de fixation à l'intérieur de l'élément de protection. Une telle solution conduit cependant à un autre inconvénient. En effet, du fait de la souplesse inhérente du matériau de l'élément, on comprend que sa fixation à l'extrémité du talon à l' aide d'un marteau ne conduise pas à l'assemblage parfaitement rigide qui est souhaité, et il est fréquent que ce type d'élément soit à remplacer bien avant que son degré d'usure ne l' exige, par exemple à cause d'une séparation prématurée de l'assemblage due à un défaut de marche, un choc accidentel, ou encore à cause d'un phénomène marqué de poinçonnement de l'élément de protection par la tête du clou qu'il abrite. On constate également des phénomènes de résonance et de glissement.To overcome this drawback, provision has been made to drown the head of the fixing nail inside the protective element. However, such a solution leads to another drawback. Indeed, due to the inherent flexibility of the element material, it is understood that its attachment to the end of the heel using a hammer does not lead to the perfectly rigid assembly which is desired, and it it is frequent that this type of element is to be replaced well before its degree of wear requires it, for example because of a premature separation of the assembly due to a malfunction, an accidental shock, or because of a marked phenomenon of punching of the protective element by the head of the nail which it shelters. There are also phenomena of resonance and sliding.
Enfin l'on remarque souvent, après un certain temps d'utilisation, en particulier avec les talons étroits tels que talons "aiguille" et analogues, que l'élément de protection peut tourner librement par rapport au talon. Ceci est bien entendu désavantageux, tant au point de vue de la stabilité et du confort de la chaussure que d'un point de vue esthétique.Finally, it is often noted, after a certain period of use, in particular with narrow heels such as "needle" heels and the like, that the protective element can rotate freely relative to the heel. This is of course disadvantageous, both from the point of view of the stability and comfort of the shoe and from an aesthetic point of view.
De très nombreux systèmes de protection de type "bonbout" ont été préconisés, commercialisés et/ou ont fait l'objet d'un assez grand nombre de brevets d'invention. On est parvenu, certes, à des éléments de bonne robustesse à l'usage (voir par exemple les documents EP-A-186 566, qui réprésente le préambule de la revendication indépendante 1, et EP-A-210 922) mais tous les perfectionnements brevetés et suggérés jusqu'ici ont essentiellement concerné les moyens de liaison ou fixation du bloc ou plaque d' usure au talon de la chaussure, par chevilles, clous, tenons ou analogues, étant convenu que cette plaque d'usure était laissée à l'appréciation du fabricant, lequel peut exercer son choix dans un large catalogue de produits existant actuellement sur le marché. On notera que, jusqu'ici, cette plaque d'usure est soit contenue dans une cuvette solidaire de la tête de clou (moyen de fixation au talon) soit maintenue en place par cette même tête en position traversante.Numerous "bonbout" type protection systems have been recommended, marketed and / or have been the subject of a fairly large number of invention patents. We have, of course, achieved elements of good robustness in use (see for example documents EP-A-186 566, which represents the preamble of independent claim 1, and EP-A-210 922) but all patented improvements suggested so far have essentially concerned the means of connection or fixing of the block or wear plate to the heel of the shoe, by ankles, nails, studs or the like, it being agreed that this wear plate was left to the appreciation of the manufacturer, who can exercise his choice in a large catalog of products currently existing on the market. It will be noted that, up to now, this wear plate is either contained in a bowl secured to the nail head (means of fixing to the heel) or is held in place by this same head in the through position.
Il est primordiale de rappeler ici les critères auxquels doit satisfaire un bonbout "idéal", à savoir :
- une bonne résistance à l'abrasion de la plaque d'usure en contact avec le sol ;
- une absence du phénomène de poinçonnement cité ci-avant, dû à l'usure prématurée de la tête du clou ou autre moyen de fixation ;
- une résistance maximale à l'arrachement c'est-à-dire à la désolidarisation du clou et de la plaque d'usure, la souplesse du matériau constitutif de cette plaque entraînant son déchiquetage prématuré.
- good abrasion resistance of the wear plate in contact with the ground;
- an absence of the punching phenomenon mentioned above, due to premature wear of the head of the nail or other fixing means;
- maximum resistance to tearing, that is to say to the separation of the nail and the wear plate, the flexibility of the material of this plate causing its premature shredding.
Il est bien évident qu'une même matière utilisée pour la plaque d'usure ne peut satisfaire à ces trois exigences et les techniques utilisées jusqu'à présent n'ont pu aboutir qu'à des compromis plus ou moins heureux.It is obvious that the same material used for the wear plate cannot meet these three requirements and the techniques used until now have only resulted in more or less happy compromises.
Il a maintenant été trouvé une solution à ce problème d'obtention d'un "bonbout" de grande qualité et de confort de marche, permettant de remplir les séries d'exigences précitées, apparent tout à fait contradictoires.A solution has now been found to this problem of obtaining a high-quality "bonbout" and walking comfort, making it possible to fulfill the above-mentioned series of apparently contradictory requirements.
Conformément à l'invention, le nouvel élément de protection, du type comportant un moyen de fixation au talon ou clou, dont la tête est noyée dans un bloc ou plaque d'usure, compose les caractéristiques selon les revendications 1 à 5 qui suivent la présente description.According to the invention, the new protective element, of the type comprising a means of attachment to the heel or nail, the head of which is embedded in a block or wear plate, composes the characteristics according to claims 1 to 5 which follow the present description.
On comprendra qu'un tel ensemble, où se trouvent fermement solidarisés le moyen de fixation, ou clou, et la plaque d'usure, puisse réunir les qualités recherchées pour le bonbout le plus parfait possible. En effet, l'emprisonnement de la tête du clou dans la partie intermédiaire très dure (ou premier matériau) procure la résistance à l'arrachement ainsi qu'aux déformations par torsion et/ou traction. Un tel moulage permet d'éviter en outre, ou en tout cas de retarder considérablement le phénomène de poinçonnement. Enfin le "surmoulage" autour de ce matériau dur par une matière plastique compatible plus souple, procurant le confort à la marche, permet de satisfaire à la condition de résistance à l'abrasion, par le choix d'un matériau de bonnes caractéristiques anti-usure.It will be understood that such an assembly, where the fastening means, or nail, and the wear plate are firmly secured, can combine the qualities sought for the most perfect bonbout possible. Indeed, the imprisonment of the head of the nail in the very hard intermediate part (or first material) provides resistance to tearing as well as to deformation by torsion and / or traction. Such molding also makes it possible to avoid, or in any case considerably delay the punching phenomenon. Finally, the "overmolding" around this hard material with a more flexible compatible plastic material, providing walking comfort, makes it possible to satisfy the condition of resistance to abrasion, by choosing a material with good anti-corrosion characteristics. wear.
En pratique, le premier matériau doit donc avoir une dureté suffisante et de préférence au moins égale à 74 Shore D. Il est avantageusement choisi parmi les matières plastiques aptes à être moulées par injection comme par exemple - à titre non limitatif - des polyamides ou polyuréthannes renforcés par une charge à base de verre ou autre matériau approprié. Le second matériau est choisi au contraire parmi les matières plastiques coulables et polymérisables de façon à réaliser, dans un moule où l'on a moulé par injection la tête du moyen de fixation ou clou, une liaison parfaite et homogène entre la résine coulée et la partie dure. Cette seconde matière plastique peut, par exemple, être constituée par un polyuréthanne sélectionné pour sa grande résistance à l'usure et à l'abrasion. Sa dureté doit être voisine de 90 Shore A seulement.In practice, the first material must therefore have sufficient hardness and preferably at least equal to 74 Shore D. It is advantageously chosen from plastics capable of being injection molded such as, for example - without limitation - polyamides or polyurethanes reinforced with a filler based on glass or other suitable material. The second material is chosen, on the contrary, from flowable and polymerizable plastics so as to produce, in a mold in which the head of the fixing means or nail has been injection molded, a perfect and homogeneous connection between the cast resin and the hard part. This second plastic material can, for example, consist of a polyurethane selected for its high resistance to wear and abrasion. Its hardness must be close to 90 Shore A only.
Des réalisations d'éléments de protection, conformes aux caractéristiques de l'invention, sont illustrées, à titre non limitatif, sur les figures 1 à 3 de la planche annexée de dessins.Protective elements embodiments, in accordance with the characteristics of the invention, are illustrated, without limitation, in Figures 1 to 3 of the accompanying sheet of drawings.
Ces trois figures représentent un ensemble complet d'éléments de protection de type "bonbout" prêt à être fixé, par la partie acérée du moyen de fixation, dans le talon aiguille d'une chaussure de femme.These three figures represent a complete set of “bonbout” type protective elements ready to be fixed, by the sharp part of the fixing means, in the stiletto heel of a woman's shoe.
Le moyen de fixation 1, constitué par une cheville à cannelures 2, est muni d'une tête solidaire 3 que l'on a emprisonnée dans le matériau plastique dur 4, avantageusement par moulage par injection. On a ensuite effectué, autour de ce moulage 4, un "surmoulage" 5 à l'aide d'une résine polymérisable donnant lieu à un matériau plus tendre et plus souple, de bonne résistance à l'abrasion. Ce surmoulage 5 constitue la plaque d'usure proprement dite du bonbout.The fixing means 1, constituted by a
Comme on peut le voir sur la figure 1, la résistance au poinçonnement de l'élément est fournie par une surface du moulage dur 4 égale à celle de la plaque d' usure 5. Sur les figures 2 et 3, au contraire, qui correspondent à des réalisations préférentielles de bonbout pour talons aiguille de faible section, une partie plus ou moins importante du matériau dur 4 vient partiellement en contact avec le sol. Par exemple, sur la figure 3, l'étroit prolongement 5 de la partie dure 4 peut servir de témoin d'usure.As can be seen in Figure 1, the punching resistance of the element is provided by a surface of the hard molding 4 equal to that of the
On a réalisé de cette façon des séries de bonbouts monoblocs qui ont été testés mécaniquement en laboratoire ainsi qu'en conditions réelles de marches prolongées. La matière dure était constituée par un polyamide chargé au verre de dureté Shore D d'environ 78 alors que la matériau coulé et surmoulé consistait en une résine polyuréthanne sélectionnée pour ses caractéristiques de souplesse et sa résistance à l'abrasion. Sa dureté, environ 90 Shore A, était bien inférieure à celle du matériau dur. En opérant ainsi, on a obtenu, pour la majorité des échantillons expérimentés, des résistances à la traction (et donc à l'arrachement supérieures à 45 Kg - considérablement plus élevées que celles des meilleurs bonbouts actuellement sur le marché - ainsi que des résistances à l'usure ou abrasion plus de quatre fois supérieures à celles obtenues avec les plaques d'usure connues.In this way, a series of monoblock bonbouts were produced which were tested mechanically in the laboratory as well as in real conditions of prolonged walks. The hard material consisted of a glass-filled polyamide with a Shore D hardness of about 78, while the molded and overmolded material consisted of a polyurethane resin selected for its flexibility characteristics and its abrasion resistance. Its hardness, around 90 Shore A, was much lower than that of hard material. By operating in this way, for the majority of the samples tested, tensile strengths (and therefore tear strength greater than 45 kg) were obtained - considerably higher than those of the best bonbouts currently on the market - as well as resistance to wear or abrasion more than four times greater than that obtained with known wear plates.
La surface imaginaire de séparation ou "ligne de démarcation" entre les deux matériaux plastiques peut être incurvée, au lieu d'être rectiligne comme sur la figure 1 de façon à prévoir une épaisseur plus grande de la plaque d'usure 5 du côté d'attaque du pied sur le sol. En outre, le témoin d'usure 6 de la figure 3 peut être conformé différemment et être prévu en couleur afin de constituer un repère facilement identifiable.The imaginary surface of separation or "line of demarcation" between the two plastic materials can be curved, instead of being straight as in FIG. 1 so as to provide a greater thickness of the
Claims (5)
- Protection element with antiskid and antiwear properties for stiletto heel shoes, typically comprising a fixation means (1) for fixation on to the heel, whereof the head portion (3) is embedded within a wear block or plate, characterized in that said head portion is molded from a first material (4) of elevated hardness plastic material, of at least 74 shore D, which is integral with a second material (5) of compatible plastic material, which is softer and resistant to abrasion, of a hardness of approximately 90 shore A only, said material playing the role of a wear plate; the head portion (3) of the fixation means (1) and the two materials (4, 5) constituting a homogenous and unitarian assembly.
- Element according to claim 1, characterized in that the first material (4) is selected from injection moldable plastic materials.
- Element according to claim 2, characterized in that the plastic material is constituted by a polymer of the polyamid or polyurethane type charged with glass.
- Element according to anyone of claims 1-3, characterized in that the second material (5) is selected from castable and polymerizable plastic materials which are compatible with the first material (4).
- Element according to anyone of claims 1-4, characterized in that the space which is occupied by the first material (4) within which said head portion (3) is molded, extends such as to come into contact with the ground after said element has been assembled on the heel of the shoe.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8912091 | 1989-09-15 | ||
FR8912091A FR2651972B1 (en) | 1989-09-15 | 1989-09-15 | PROTECTIVE ELEMENT FOR SHOE NEEDLE HEEL. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0419317A1 EP0419317A1 (en) | 1991-03-27 |
EP0419317B1 true EP0419317B1 (en) | 1994-11-30 |
Family
ID=9385506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900402478 Expired - Lifetime EP0419317B1 (en) | 1989-09-15 | 1990-09-10 | Protective element for stiletto heel of a shoe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0419317B1 (en) |
DE (1) | DE69014520D1 (en) |
FR (1) | FR2651972B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010129914A1 (en) * | 2009-05-07 | 2010-11-11 | Brown Shoe Company, Inc. | Top lift assembly for a shoe heel |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991012741A1 (en) * | 1990-02-20 | 1991-09-05 | Fisher Camuto Corporation | Shoe with improved dual hardness heel-lift |
EP0566753A1 (en) * | 1992-04-18 | 1993-10-27 | F.LLI FAVERO & C. s.n.c. | Method for the realization of a heelpiece and the product obtained with it, particularly footwear |
JPH06108U (en) * | 1992-06-11 | 1994-01-11 | ヒラキ株式会社 | Shoe lift structure |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7723365U1 (en) * | 1977-07-27 | 1977-11-10 | Moelde Gustav Moeller Kg, 4930 Detmold | Screw studs for sports shoes |
AU8318782A (en) * | 1981-05-15 | 1982-11-18 | Dowty Seals Limited | Studs for footwear |
FR2507874A1 (en) * | 1981-06-19 | 1982-12-24 | Polyplastiform | HEEL, ESPECIALLY FOR WOMEN'S SHOES |
FR2585219B1 (en) * | 1985-07-23 | 1988-02-26 | Bouchet Sa Manoel | ANTI-WEAR AND ANTI-SLIP PROTECTION ELEMENT FOR SHOE HEELS |
-
1989
- 1989-09-15 FR FR8912091A patent/FR2651972B1/en not_active Expired - Fee Related
-
1990
- 1990-09-10 DE DE69014520T patent/DE69014520D1/en not_active Expired - Lifetime
- 1990-09-10 EP EP19900402478 patent/EP0419317B1/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010129914A1 (en) * | 2009-05-07 | 2010-11-11 | Brown Shoe Company, Inc. | Top lift assembly for a shoe heel |
CN102481032A (en) * | 2009-05-07 | 2012-05-30 | 布朗鞋业公司 | Top lift assembly for a shoe heel |
US8484863B2 (en) | 2009-05-07 | 2013-07-16 | Brown Shoe Company, Inc. | Top lift assembly for a shoe heel |
Also Published As
Publication number | Publication date |
---|---|
EP0419317A1 (en) | 1991-03-27 |
DE69014520D1 (en) | 1995-01-12 |
FR2651972A1 (en) | 1991-03-22 |
FR2651972B1 (en) | 1993-12-31 |
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