EP1559338A2 - Shoe with upper comprising at least one glued part - Google Patents

Abstract

The shoe has an upper formed of two pieces that are assembled by gluing. A set of carriers (121) is constituted of a strap made of synthetic textile material and disposed face-to-face along the length of a lacing zone (119). The carriers are assembled between two glue layers (130, 131) of the upper. A band (132) permits perfect folding and assembling of carriers at the upper.

Description

The invention relates to the field of footwear, and more particularly to that of sport shoes.

Sports shoes have a sole that can be flexible or rigid and on which is mounted a rod which covers the foot of the user. This stem is most of the time made in the form of several pieces that are cut and assembled together in order to form a three-dimensional envelope as close as possible to the shape of the foot. Generally, the shape of these pieces and the materials that constitute them are dictated by the position of said parts and the function that we want them to fill. The stem can also have inserts such as a front end brace, usually of leather thick or rubber.

In most sports shoes, the upper has internal sidewalls and which are intended to be brought closer to each other by a clamping system, the most often a lacing. These neighborhoods are then separated by a longitudinal slit below which can extend a comfort tab.

In certain types of footwear, including cross-country ski boots or certain hiking boots, the upper has a protective flap that covers the lacing system but that can deviate to allow lacing and delamination, so the donning and loosening the shoe. This protective flap is particularly useful for shoes intended to be worn in the snow because it prevents snow from to get into the shoe at the level of the split that separates the lateral quarters of the stem.

In a classic design of the stem, the various parts that constitute it are in principle assembled by stitching (also called stitching). For that, the parts to assemble overlapping portions in which two adjacent pieces are superimposed. A through seam, visible on both sides of the overlay, links the two parts to each other. With a through seam, the sewing thread is exposed on both faces, so especially on the outer face of the stem. He is thus exposed to the aggressions outside and in particular the friction that can wear the wire and thus cause the break sewing. Similarly, it is known that the through seams are entry points of moisture in the shoe.

An object of the present invention is to propose a new design of the assembly of some parts of the upper of a shoe.

A particularly desired goal is to increase the wear resistance and / or the resistance to penetration of moisture.

Another goal is to provide a new aesthetic of the shoe.

This or these goals are achieved in the shoe according to the invention, which is of the type comprising a rod and a soleplate, in particular in that the rod comprises at least two pieces which are assembled to each other at least in part by a bonding zone.

The invention will find a first application in assembling by gluing a flap protective cover for covering a clamping system.

The bonding of the two rod elements can be carried out in a disbursed zone where one of the two rod elements has a disbursement, for example in the form of a zone of less thick.

The invention will find a second application in the case where the upper of the shoe comprises a closure system assembled at least in part by gluing on the rod.

In the case where the closure system is a lacing type closure system comprising a series of passers-by distributed on either side of a boot opening of the rod, loops are optionally attached to the rod at least in part by gluing.

According to a first aspect, each passer is individually assembled to the shank by stitching and / or collage and a band of applique is assembled by gluing on all the passers-by located along each edge of the lacing area. As a result, the absence of fragile seams with respect to friction and abrasion, on the outer face of the stem of the shoe in an area particularly subject to such aggression. The shoe is from this is much more resistant to wear. In addition, the shoe is given a very particular, without visible seams, and therefore very sober, stripped and very aesthetic. If the materials constituting the shoe are impermeable we get more of a construction waterproof.

According to a second aspect, each passerby has two parts, a first part having a base, provided with an assembled hole and by sticking to the stem, and a second part inserted through the hole of the first part. This construction allows an assembly easier passers-by. It also makes it possible to optimize the passer according to the materials chosen for each part of it.

In this case it is possible for example to provide that the base of the first part is made of material synthetic material and is assembled by welding to the material of the rod. The base can be fixed to the stem without the addition of additional material.

• la figure 1 est une vue schématique en perspective avec arrachement d'un premier exemple de réalisation d'une chaussure de sport conforme aux enseignements de l'invention, la chaussure comportant un rabat de protection,
• la figure 2 est une vue agrandie de l'arrachement de la figure 1 illustrant plus en détail la zone de collage,
• la figure 3 est une vue similaire à celle de la figure 1 illustrant une variante de réalisation de l'assemblage du rabat de protection (lequel est par ailleurs illustré en position ouverte),
• la figure 4 est une vue similaire à celle de la figure 2 est une vue agrandie de l'arrachement de la figure 1 illustrant plus en détail la variante de réalisation de la zone de collage du rabat sur la tige,
• la figure 5 est une vue schématique en perspective avant d'un autre mode de réalisation d'une chaussure selon l'invention,
• la figure 6 est une vue similaire à la figure 5 avec arraché partiel illustrant le mode de fixation des passants,
• la figure 7 est une vue de détail schématique montrant une première étape d'assemblage à la tige d'un passant selon un autre mode de réalisation,
• la figure 8 est une vue de dessous en éclaté du passant avant assemblage,
• la figure 9 est une vue similaire à la figure 7 montrant une seconde étape d'assemblage,
• la figure 10 est une vue similaire aux figures 7 et 9 montrant une troisième étape d'assemblage.

Other features and advantages of the invention will appear on reading the detailed description which follows, as well as in view of the appended drawings in which:

• FIG. 1 is a diagrammatic perspective view of a first exemplary embodiment of a sports shoe according to the teachings of the invention, the boot comprising a protective flap,
• FIG. 2 is an enlarged view of the cut-away of FIG. 1 illustrating in more detail the bonding zone,
• FIG. 3 is a view similar to that of FIG. 1 illustrating an alternative embodiment of the assembly of the protective flap (which is also shown in the open position),
• FIG. 4 is a view similar to that of FIG. 2 is an enlarged view of the tearing of FIG. 1 illustrating in more detail the variant embodiment of the flap bonding zone on the rod;
• FIG. 5 is a diagrammatic front perspective view of another embodiment of a shoe according to the invention,
• FIG. 6 is a view similar to FIG. 5 with partial cutaway illustrating the method of fastening passers-by,
• FIG. 7 is a schematic detail view showing a first step of assembly to the rod of a passer according to another embodiment,
• FIG. 8 is an exploded bottom view of the passer before assembly;
• FIG. 9 is a view similar to FIG. 7 showing a second assembly step,
• Figure 10 is a view similar to Figures 7 and 9 showing a third assembly step.

In all the embodiments and variants illustrated, there is shown a sports shoe 10, 110 which essentially comprises a sole 12, 112 on which a rod 14, 114 is mounted by any known technique. The rod 14, 114 can thus be mounted on the sole by gluing, stitching, overmolding or any other method.

The rod 14, 114 of the boot according to the invention is essentially a flexible rod, that is to say a rod formed of main parts made of flexible materials, or relatively flexible, such as fabrics, coated fabrics, leather and / or synthetic materials used in thin layers such as films, etc. The stem may, however, contain elements relatively rigid complements to ensure shaping of the rod, and by foot support, such as rigid or semi-rigid buttresses, end caps, protective or decorative elements or local reinforcements.

Moreover, the use of materials that are inherently flexible does not prevent them from use in a thickness or in a chemical form such that they possess some rigidity.

As opposed to alpine ski boots made of rigid materials, a flexible upper according to the present invention adapts to the flexion of the foot and / or the unwinding thereof during practice Sport.

According to the invention, the rod 14, 114 is formed externally of several pieces, that is to say at least two rooms. At least two of these pieces are assembled by a zone of bonding.

By gluing, we mean both an assembly of two parts by an adhesive material interposed between the two pieces, that a bonding by welding in which the two materials are assembled directly to each other under the effect of a local heat input or under the effect of vibrations, for example high frequency or ultrasonic bonding. In the first case, the usable material may be a liquid or pasty adhesive, a cement, or a ribbon melt. In the second case, sometimes called welding bond, there is no contribution of material between the two parts to be assembled.

Preferably, the bonding zone will be continuous for reasons of better strength mechanical, better aesthetic appearance, and for reasons of better impermeability.

In the two examples illustrated in FIGS. 1 to 4, the sports shoe is a shoe of cross-country ski 10, the sole 12 of which has attachment means 16 intended to cooperate with a cross-country ski binding. The variants of Figures 1 and 3 differ only in the embodiment of the glued assembly.

As can be seen in Figure 3, the upper of the shoe shown has a slap 15 which substantially covers the forefoot and which extends rearwardly along the sole, substantially to the heel. It also includes a clamping system, the occurrence a lacing clamping system 20, intended to bring together two quarters 22 of the stem separated by a longitudinal slot 24 which extends into the area of the instep. The 22 can be made in one piece with the slap 15, or made in the form of separate rooms. In this first type of shoe, the rod 14 further comprises a flap of protection 26 which, in an open position (see Figure 3), gives access to the lacing, and in a closed position (see Figure 1), covers the clamping means 20 and the longitudinal slot 24.

This protective flap 26 consists of a piece of flexible material which covers the portion of the rod 14 corresponding to the upper part of the foot from the back of the toes to the ankle. The flap 26 therefore has two longitudinal inner and outer edges 17, and a front edge 32 which are joined to the slab 15 by gluing. The longitudinal edges 17 flap 26 extend along the sides of the instep of the shoe, and the front edge 32 extends substantially transversely across a zone corresponding to the zone of metatarsophalangeal flexion of the shoe. The rear edge of the flap 26 is free, and the flap 26 has a zipper 28 which opens into the rear edge and which delimits in the flap two flaps likely to deviate from one another when the slide 28 is open to give access to the lacing. The flap 26 is preferably made of a material substantially impervious, for example a coated fabric or a PVC sheet.

According to the invention, the flap 26 is assembled to the slab 15 by a gluing zone 18 which, preferably, extends continuously over the entire length of the longitudinal, longitudinal and transverse edges 17 32, flap.

In Figure 2, there is schematically illustrated a way to achieve this collage here using an adhesive layer 30 distributed along the bonding zone. In that case, it can be seen on the one hand that the edge of the flap 26 and the slap 15 overlap in the area of collage 18, the flap being arranged above the slap. Moreover, the edge of the flap 26 is trimmed, that is to say, it is cut in bevel to gradually decrease its thickness as and as you approach the edge. Preferably, it is the underside of the flap 26 which is thus bevelled. In this way, after assembly, we do not perceive, or hardly overthickness at the boundary between the flap and the slap.

In this embodiment, the assembly is achieved by means of a conventional glue. he can thus be a PU-based glue; for example a polymerizable two-component adhesive type of those used for the assembly rod / sole. This glue is deposited for example manually with a brush on the bonding areas, and the assembly and eventually realized in press to ensure good membership.

FIG. 4 illustrates a variant in which at least one of the two pieces which are assembled by gluing comprises, in the gluing zone 18, a zone forming a counterbore, that is to say whose surface has a disbursement. This counterbeat can be a simple local deformation, a zone of lesser thickness, or a zone that has undergone local compression to reduce the thickness, with the additional result of a local densification of matter. This compression is generally obtained by processes associating pressure and heat, for example by marking with high frequencies.

Thus, in the example illustrated, the edge of the slap 15 has a compressed zone of reduced thickness which extends over the entire assembly zone 18. The upper face of the slap 15 thus has a disbursement marked by a flange 32, disbursement corresponding to a zone of thickness "e2" less than the thickness "e1" of the remainder of the slap. The edge of the flap 26, which can be trimmed or not, thus overlaps this disbursed edge of the slap, always with the interposition of the glue 30. As can be seen in the figure, the disbursement of the slap reduces the extra thickness of the bonded assembly, allowing at the edge of the flap to be almost flush at the level of the upper face of the slap beyond Of course, one could expect that each of the faces in contact with the two bonded parts are disbursed in their overlapping area, which would reduce any extra thickness. Advantageously, the disbursement makes it possible to protect the the song of the piece above it in the overlap (in this case the song of the flap 36), thus limiting the risk of peeling by peeling and peeling. In addition, the edge 32 allows to contain the glue in case it would flow outward when the assembly is put under pressure to ensure bonding, limiting the unsightly nature of any overflow of glue. Moreover, for the case where this overflow of glue would take place, beyond of the overlap zone, the flange 32 force the glue back into contact with the edge of the edge of the flap 26, drowning this song in the glue. The song would then be reinforced by a slight excess of glue, avoiding, for example, any risk of fraying the edge.

Advantageously, the zipper 28 is also assembled to the flap 26 by bonding. For this, there is provided in the flap a rectangular cut that extends for example parallel to a longitudinal edge 17 of the flap, and which opens into the rear edge of the flap. The zipper, which features two ribbons (each of which carries a series of teeth), is glued by the outer edges of the ribbons against the underside of the flap, along edges of the window.

Thanks to this bonded construction it can be seen that the connection can not be affected by friction and other external aggressions, which increases its life. That is particularly important for the connecting areas which are located in the lower part of the shoe, that is to say the part below the user's ankle, and even more particularly in the metatarsophalangeal flexion zone and in the lacing zone.

Of course, such an assembly by gluing is completely impermeable, resistant to penetration of moisture in the shoe, moisture from rain or snow.

The bonding assembly is particularly interesting for joining the pieces of the stem which are arranged on the outside of the stem, and which are therefore both visible, subject to direct contact with water, moisture or snow, and subject to friction. Such assembly is therefore particularly advantageous for a protective flap, but it can also be used for other parts of the stem, as will be seen in connection with the other embodiments. In fact, collage assembly removes the existence of exposed seams particularly fragile with respect to abrasion, rubbing and removes therefore the risk of breaking said seams. Bonding assembly also provides a very particular aesthetic by the absence of any apparent seam.

In the illustrated embodiment, the materials of the two pieces of the rod that are assembled to one another by gluing are identical and of the same order of thickness.

Optionally, it can be provided that for the assembly of the two parts considered, the bonding area is completed by other means of assembly. We know that Collage techniques are very effective in terms of resistance to stress shear. On the other hand, they may be less resistant to pulling constraints or peel. If one of the parts of the connecting area of the two parts is particularly prone to such constraints, we can choose to replace or supplement, in this zone, gluing assembly by another type of assembly, for example by stitching. In illustrated example, it can be expected that at the rear ends of the edges longitudinal 17 flap, the bonding area is reinforced by stitching.

In the example of FIGS. 5 and 6, the upper 114 of the boot has a vamp or external slap 115 which substantially covers the forefoot of the user namely the instep and the toes and extends rearwardly along the sole 112 substantially to the heel. This slap 115 is in this case represented as a single piece, it could also be made of two pieces assembled to one another by gluing.

At the level of the area of the instep, the slap 115 defines a double bellows 115a and a tongue 115b allowing a wide opening of the rod by the introduction of the foot. According to case the bellows 115a could be replaced by slots located between the tongue 115b and the associated edge of the slap for even greater opening of the stem or by bellows in a finer material.

The edges of the bellows 115a thus define a lacing zone 119 provided with a system clamping device, in this case a lacing clamping system 120.

The lacing system 120 consists of a series of loops 121 arranged opposite the along the edges 119a of the lacing zone 119 and a lace 122 passing alternately in the loops 121 arranged opposite to allow the approximation of these edges to the tightening of the shoe on the foot.

In the case shown passers 121 are assembled by gluing on the rod. This is in the occurrence of straps 121 of the strap type, that is to say that they consist of a strap in synthetic textile material (such as polyester, polyamide or polypropylene) or folded leather on itself in V as shown, or simply folded on itself without forming angle, so as to form a loop for the lace.

Depending on the case, passers-by 121 may also be covered or reinforced internally. by an insert of synthetic material, as described for example in US 5,906,057 to name of the applicant, so as to improve the sliding of the lace 122.

FIG. 6 illustrates the method of bonding the loops 121 to the rod 114.

First of all each passer 121 is glued individually on the slap 115 by means of a first glue film 130 which may be for example a polyurethane glue film sold under the trade name "Bemis" or "Daewoo". This first collage step can optionally be reinforced, or replaced by securing by sewing. The film glue may be of another thermoplastic material such as polyamide, polyester, ... etc. He will be chosen according to the materials constituting the passers-by 121 and the slap. Then a band 132 is also glued via a second strip of glue film 131 on the set of passers 121 and the slap 115 of the rod 114 along the edges of the lacing area 119.

The glue film 131 is of the same type as the first glue film, namely a glue film for example polyurethane sold under the trade name "Bemis" or "Daewoo" or other thermoplastic material. The gluing is preferably done flat, before assembly and shaping of the rod 114. The conditions of temperature and pressure bonding depends on the materials used for slapping, loops and glue film.

For example, the temperature can be between 150 ° and 225 ° C and the pressure is of the order of 1 to 10 bar for a polyurethane-type adhesive film.

The band 132 applies to perfect the bonding and assembly passers 121 to the rod. Indeed the passers 121 are assembled to the rod between the two layers of glue 130 and 131 and are therefore perfectly kept. It also ensures total waterproofness in the case where seams are used at the level of the first assembly of the passers 121 to the rod. It ensures the absence of fragile seams that could be damaged by the friction applying in the lacing zone.

Finally, the applique strip 132 makes it possible to impart a very sober aesthetic and particularly successful at the seamless lacing area apparent, especially as passersby shaped straps used are particularly flat and discreet.

We obtain a particularly aesthetic lacing system and, surprisingly sufficiently resistant, despite the great efforts exerted on the bonding area during the tightening and use of the shoe.

Of course the collage mode described above could be modified. So passersby 121 could be first assembled by gluing to the applique strip 132 before the assembly formed of the band 132 and the passers 121 is glued to the plate 115.

Similarly passers 121 could be assembled in a single strip of passers before assembly on the stem.

Passers-by 121 could be constituted by other types of passers-by and especially by passers synthetic material, individual and / or arranged in bar.

Figures 7 to 10 illustrate another embodiment of the invention applied to lacing with passers-by 221 not "flat".

In this case, these passers-by 221 consist of two parts, namely a first part 230 which comprises a base 231, provided with a hole 232 of elliptical shape and a half sleeve 233, partially covering the hole 232 of the base and itself comprising a opening 234, located in a plane forming an angle of approximately 45 ° with the base 231.

On the opposite side to the sleeve 233, the base 231 has a countersink 235 around its hole 232.

As will be seen later this countersink 235 is intended to cooperate with a base 245 of a hook 240 forming the other part of the passer 221, this hook 240 comprising moreover a ring-shaped portion 244 for projecting from the opening 234 of the first portion 230.

This first part 230 is made of a synthetic material such as PU or polyamide. It could also be made of any other material. She went through a hole associated 216 formed in the material of the slap 215, so that its base 230 remains at contact with the underside 215a of the material of the slap 215 and that the half sleeve 233 on the contrary protrudes from the outer side, that is to say from the side of the upper face 215b of the slap 215.

The base 230 is then welded to the material of the slam 215 by a welding operation high frequency, such an operation being made possible by the material (PU) used for the base 230.

Depending on the case and / or the materials used for the first part 230 of the passer and / or the 215, the base 230 could be "glued" by other means and in particular after interposition of a glue film.

Once the first part 230 of the passerby is assembled to the slap, the second part or hook 240 is inserted into the hole 232 and the opening 234, its base 245 adjusting to the 235 countershaft of the base 230.

A local reinforcement 250 is then applied and assembled by gluing, using a film of glue 251 on the underside 215a of the appliqué 215 so as to prevent the exit of the hook 240 and therefore the disassembly of the passer 220.

This reinforcement 250 also serves to locally reinforce the assembly of the passer to the slap 215.

Here we also obtain a very aesthetic, waterproof and nevertheless very resistant assembly, slap.

In the present case, the hook-shaped portion 240 may be made of a metallic material, and therefore particularly resistant to wear.

In the case shown, the loop 230 is welded, glued to the rod without the use of seams reinforcement and no applique is then reported on the outer face of the slap. According to case, such a wall lamp could be used for aesthetic reasons, such as having a Lacing tape as in the previous example, hide the holes 216, ... etc. We can also consider that the base 230 is fixed by stitching to the slam, in this case a strip glued wall is necessary to improve the aesthetics and seal the seams.

As in the other embodiments described above, the connection of the lacing to the rest of the stem is reinforced and protected from external aggressions, and allows make a completely waterproof bond and much less fragile to abrasion, friction.

Finally this assembly by gluing confers a particularly sober aspect and opens of new possibilities in terms of aesthetics of the entire shoe.

Of course, the present invention is not limited to the described embodiments only. above by way of nonlimiting examples, but encompasses all the embodiments similar or equivalent. In particular, the particular aspects of each of the modes of described embodiments can be transposed to the other embodiments, with the advantages thereon.

Claims (22)

Shoe comprising a sole (12) and a shaft (14), characterized in that the shaft (14) comprises at least two parts (14, 26) which are connected to each other at least partly by means of a zone gluing (18, 30). Shoe according to claim 1, characterized in that the rod (14) has quarters (22) which are joined by a clamping system (20), and a protective flap (26) for covering the clamping system (20). ), and in that the protective flap (26) forms a part of the rod (14) which is assembled to the rod by gluing. Shoe according to any one of the preceding claims, characterized in that the bonding zone (18) is arranged on an outer face of the rod (14). Shoe according to claim 4, characterized in that the bonding zone (18) is arranged on an outer face of the rod (14) which is exposed to abrasion. Shoe according to one of claims 4 or 5, characterized in that the bonding zone is arranged on an outer face of the rod (14) which is exposed to moisture. Shoe according to any one of the preceding claims, characterized in that the parts of the rod (14) which are assembled by gluing are made of flexible material. Shoe according to any one of the preceding claims, characterized in that the parts of the rod which are assembled by gluing are made of impermeable material. Shoe according to any one of the preceding claims, characterized in that it comprises a lacing clamping system assembled at least partly by gluing on the rod (115, 215). Shoe according to claim 8, characterized in that the lacing clamping system comprises a series of loops (121, 221) assembled by gluing. Shoe according to claim 9, characterized in that the loops (121, 221) are assembled individually. Shoe according to one of claims 9 or 10, characterized in that each passer (221) has two parts, a first portion (230) having a base (231) provided with a hole (232) assembled by gluing to the stem (215) and a second portion (240) inserted through the hole (232) the first portion. Shoe according to claim 11, characterized in that the first part (230) is passed through an associated hole (216) of the rod, and in that its base is glued against the underside of the rod. Shoe according to claim 11 or 12, characterized in that the base (230) of the first part is made of a synthetic material and is assembled by welding to the material of the rod (215). Shoe according to claim 11 or 12, characterized in that the base is assembled to the first part by bonding with a glue film interposed between said base and the rod. Shoe according to one of claims 11 to 14, characterized in that the second part is a metallic material. Shoe according to one of claims 11 to 15, characterized in that a reinforcement is applied on the underside of the passer and the rod. Shoe according to claim 10, characterized in that each loop (121) is individually assembled to the rod by sewing and / or gluing and in that a band of application (132) is assembled by gluing on all passers-by (121) located along each of the edges (119a) of the lacing area (119). Shoe according to claim 17, characterized in that the bonding is carried out by means of a thermoplastic adhesive film. Shoe according to one of claims 17 to 18, characterized in that each looper (121) is strap type. Boot according to one of claims 11 to 19, characterized in that the lacing fastening system is disposed in an area exposed to abrasion. Shoe according to any one of the preceding claims, characterized in that at least one of the two pieces has, in the bonding zone, a disbursement. Shoe according to claim 21, characterized in that the disbursement corresponds to a zone of lesser thickness of said part.

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