Shoe with removable sole and method for manufacturing such a shoe

Abstract

The present invention relates to a shoe (1), in particular a sports shoe, comprising: - an upper (10) comprising a textile bootie (100); - an insole (14) arranged inside the textile bootie (100); - an outsole (12) reversibly attached to the insole (14); the insole comprising a peripheral edge, the outsole (12) comprising a peripheral border having a peripheral groove, the attachment of the outsole (12) to the insole being obtained by elastic interlocking of the peripheral edge of the insole in the peripheral groove of the outsole (12), the portion of the textile bootie surrounding the peripheral edge of the insole being sandwiched between the peripheral edge of the insole and the peripheral groove of the outsole (12).

Description

[0001] Shoe comprising a removable sole and method of manufacturing such a shoe

[0002] This application relates to an item of footwear, such as a sports shoe, allowing simplified assembly, in particular without glue and without sewing, in particular with the aim of making the shoe easily disassemblable.

[0003] Conventional footwear typically includes an upper and an outsole. The upper is secured to the sole structure and forms a foot-receiving volume within the shoe to comfortably receive and secure a foot. The sole structure is connected to the upper at a lower portion of the upper. In athletic footwear, the outsole may include an outsole and a midsole. The midsole typically includes a polymeric material intended to absorb shock from the ground upon impact to lessen the effects on the foot and leg during walking, running, or other ambulatory activities. The outsole may also include a liner positioned within the landing volume and proximate the underside of the foot to enhance the comfort of the footwear.The soles are traditionally joined to the uppers using a process called Strobel, in which the various sole elements (inner sole, midsole and outsole in particular) are glued and / or sewn.

[0004] Shoes manufactured using known methods have the disadvantage that the outsole is not separable from the upper because it is glued and / or sewn to the latter. It is therefore not possible to easily separate the upper and the outsole, nor to separate these two elements in a non-destructive manner.

[0005] The present invention is based on the observation that providing a shoe whose outer sole could be easily separated from the upper would, on the one hand, facilitate any repair or recycling operations of such a shoe, and, on the other hand, allow for the consideration of a modular shoe, whose outer sole could be easily changed, for example depending on the type of use envisaged.

[0006] To this end, the invention relates to a shoe, in particular a sports shoe, comprising: - an upper comprising a textile liner;

[0007] - an internal sole placed inside the textile slipper;

[0008] - an outer sole reversibly attached to the inner sole; the inner sole comprising a peripheral edge, the outer sole comprising a peripheral border having a peripheral groove, the attachment of the outer sole to the inner sole being obtained by elastic fitting of the peripheral edge of the inner sole into the peripheral groove of the outer sole, the part of the textile slipper surrounding the peripheral edge of the inner sole being sandwiched between the peripheral edge of the inner sole and the peripheral groove of the outer sole.

[0009] Thus, the shoe according to the invention allows reversible attachment of the outer sole to the inner sole, and therefore to the upper. This attachment is achieved without glue or stitching, which simplifies the assembly of the shoe and also makes it possible to make the shoe disassemblable. Each of the main components of the shoe (outer sole, inner sole and upper) can therefore be easily and quickly changed, particularly in the event of excessive wear. In addition, components such as the outer sole and the upper can be changed, for example to allow the user to put on a sole adapted to a particular sporting practice, or to put on an upper adapted to the climatic conditions of the day.The outer sole being fixed to the rest of the shoe in a reversible manner, in particular without glue or stitching, by means of an elastic interlocking type fixing (or clipping), the disassembly and reassembly of the shoe is made simple and quick, and the user can thus carry out these operations himself, without the help of a professional. In addition, by allowing the different components of the shoe according to the invention to be easily separated, the recycling operations of the shoe are facilitated when it is at the end of its life. Finally, the outer sole can advantageously be produced using an additive manufacturing process, it is possible to produce it and the different elements it comprises (outsole, midsole, possible reinforcements, etc.) in a single material, which simplifies the recycling of the shoe, and during a single manufacturing operation, which simplifies manufacturing.

[0010] According to other characteristics of the invention, the shoe according to the invention comprises one or more of the following optional characteristics, considered alone or in all possible combinations.

[0011] In one embodiment, the peripheral rim forms a projection extending from an upper surface of the outer sole, the peripheral groove forming an open cavity opening onto an inner side of the peripheral rim.

[0012] In one embodiment, the opening of the cavity formed by the peripheral edge is oriented in a direction normal to the direction in which the peripheral edge extends, or slightly inclined relative to the normal direction, for example inclined by at most 15°.

[0013] In one embodiment, the peripheral edge of the inner sole is engaged in the peripheral groove over at least 80% of the contour of the inner sole or over the entire contour of the inner sole.

[0014] In one embodiment, the textile slipper comprises a lower portion sandwiched between a lower surface of the inner sole and an upper surface of the outer sole.

[0015] In one embodiment, the inner sole comprises two fastening elements, each fastening element being reversibly inserted into a respective cavity provided in the outer sole, each cavity opening at the upper surface of the outer sole, the lower part of the textile slipper comprising at the level of each fastening element an opening through which the corresponding fastening element extends.

[0016] In one embodiment, one of the attachment elements is disposed at a front portion of the insole and forms a hook facing the front of the shoe, the other attachment element being disposed at a rear portion of the insole and forming a hook facing the rear of the shoe.

[0017] In one embodiment, the outer sole comprises a midsole and a wear sole, the wear sole being reversibly attached to the midsole, in particular by clipping.

[0018] In one embodiment, the outsole comprises in the front portion a flexible fastening tab, the fastening tab comprising a locking portion which is sandwiched between, on the one hand, the inner sole and the upper and, on the other hand, the midsole, when the shoe is assembled. In one embodiment, the midsole has in the rear portion a tapered shape ensuring retention of the outsole when the shoe is assembled.

[0019] In one embodiment, a connecting portion between the groove and an upper part of the peripheral edge has a radius of curvature of between 0.1 and 1 mm, and for example of between 0.2 and 0.6 mm.

[0020] In one embodiment, the height of an upper part of the peripheral border is between 1 and 4 mm, and for example between 1.5 and 2.5 mm.

[0021] In one embodiment, an inner surface of the groove has ribs spaced apart over at least a portion, and preferably over the entire contour of the groove.

[0022] In one embodiment, the peripheral edge comprises one or more shoe reinforcement elements from among the following reinforcement elements:

[0023] - a heel counter, covering part of the upper located at the back of the shoe rear part of the upper;

[0024] - a front end reinforcement, covering part of the upper located at the front of the shoe;

[0025] - one or more lateral reinforcements.

[0026] In one embodiment, the peripheral edge of the outer sole comprises at least one flex notch at a portion of the sole corresponding to the forefoot.

[0027] In one embodiment, the textile slipper is made by knitting.

[0028] In one embodiment, the textile slipper comprises an external part and an internal part, the external and internal parts being connected to each other at least at the level of an opening for insertion of the foot.

[0029] In one embodiment, the inner sole is arranged inside the inner part of the textile slipper.

[0030] In one embodiment, the internal part and the external part of the textile slipper have different thicknesses.

[0031] In one embodiment, the outsole is made using an additive manufacturing process.

[0032] The invention also relates to a method of manufacturing a shoe as defined above, the method comprising the steps of: - knitting a textile slipper;

[0033] - insert the inner sole inside the textile slipper;

[0034] - fix the outer sole to the inner sole.

[0035] In one embodiment, the method comprises a step of shaping the textile slipper before the step of inserting the inner sole, the shaping step being carried out by hot forming the textile slipper on a form, the textile slipper comprising thermofusible fibers.

[0036] In one embodiment, the step of knitting a textile slipper is carried out so as to obtain a textile slipper comprising an external part and an internal part linked together at an opening for introducing the foot.

[0037] Other characteristics and advantages of the present invention will appear on reading the description which follows and on examining the appended figures in which:

[0038] - figure 1 is a schematic side view illustrating a shoe according to the invention;

[0039] - figure 2 is a schematic perspective view of the shoe of figure 1;

[0040] - figure 3 is a schematic perspective view illustrating the components of the shoe of figure 1, before assembly;

[0041] - figure 4 is a schematic perspective view of the upper of the shoe of figure 1;

[0042] - Figure 5 is a schematic perspective view illustrating the midsole of the shoe of Figure 1;

[0043] - Figure 6 is a schematic cross-sectional view of the shoe of Figure 1 in an assembly configuration;

[0044] - figure 7 is a view similar to that of figure 6 without the rod 10;

[0045] - figure 8 is a schematic perspective view illustrating an inner sole provided with attachment elements and showing more particularly the lower face of the inner sole;

[0046] - Figure 9 is a perspective view of a midsole configured to cooperate with the inner sole of Figure 8;

[0047] - figure 10 is a schematic perspective view of an upper configured to cooperate with the inner sole of figure 8 and the midsole of figure 9; - figure 11 is a schematic view from below of a textile slipper during manufacture, at the end of a knitting step;

[0048] - figure 12 is a schematic view from below of a textile slipper during manufacture, after a turning step;

[0049] - figure 13 is a schematic view from below of a textile slipper during manufacture, at the end of a step of forming the openings;

[0050] - figure 14 is a schematic view of an intermediate sole according to the invention obtained by means of an additive manufacturing process;

[0051] - Figure 15 is a partial cross-sectional view of the outsole of Figure 15;

[0052] - figure 16 is a schematic perspective view of an elementary pattern of the internal structure of the sole of figure 14;

[0053] - figure 17 shows an example of an embodiment of an internal sole according to the invention;

[0054] - figure 18 shows an example of the construction of the outer sole;

[0055] - figure 19 shows an example of the construction of the outsole;

[0056] - Figure 20 shows the outsole of Figure 19 assembled to the midsole.

[0057] Figures 1 to 7 illustrate a shoe 1 according to the invention, in the example a sports shoe, and more particularly a shoe suitable for running.

[0058] Shoe 1 has three main components which are assembled in a reversible manner:

[0059] - an upper 10 comprising a textile slipper 100;

[0060] - a 12 outsole,

[0061] - an internal sole 14 (visible in figure 3).

[0062] The components of shoe 1 are visible in Figure 3, which shows these components unassembled. In the example, the outsole 12 has a midsole 12a and an outsole 12b.

[0063] In order to achieve the reversible assembly of the shoe 1, the outer sole 12 is reversibly fixed to the inner sole 14, a portion of the upper 10 being trapped between the two soles 12, 14. More precisely, the mutual fixing of the outer sole 12 and the inner sole 14 is achieved by elastic interlocking (i.e. by clipping), so as not to require any tools or any additional assembly elements such as glue or stitching.

[0064] Furthermore, a portion of the upper 10, and more precisely a portion of the textile slipper 100, is sandwiched between the inner sole 14 and the outer sole 12. An example embodiment of the shoe of figure 1 is described below, in relation to figures 1 to 7.

[0065] As seen in Figure 5, the outer sole 12 (and more precisely, in the example, the intermediate sole 12a) comprises a body 120 having an upper face 122 and a lower face 124. The outer sole 12 comprises a peripheral edge 126 forming a projection extending from the upper face 122, the peripheral edge 126 comprising a peripheral groove 128.

[0066] As seen in Figure 3, the inner sole 14 has an upper face 140 and a lower face 142. The upper face 140 is intended to receive the foot of a user, either directly or by means of an additional sole (not shown) superimposed on the inner sole 14, generally called a sockliner. The inner sole 14 has a peripheral edge 144.

[0067] The attachment of the outer sole 12 to the inner sole 14 is obtained by elastic fitting of the peripheral edge 144 of the inner sole 14 into the peripheral groove 128 formed on the peripheral edge 126 of the outer sole 12 (or, more precisely, in the example of the intermediate sole 12a).

[0068] To enable cooperation between the peripheral edge 144 and the peripheral groove 128 to ensure the desired reversible fixing, at least one and / or the other of these two elements is elastically deformable.

[0069] As seen in Figures 6 and 7, the peripheral groove 128 forms an open cavity configured to receive and retain the peripheral edge (and a portion of the textile liner 100 as described in more detail below). The opening of this cavity is oriented inwardly, that is to say towards the interior space delimited by the peripheral edge 128. Preferably, the opening of this cavity is oriented in a direction normal to the direction in which the peripheral edge extends from the upper surface 122, or in a direction slightly inclined relative to this normal direction, for example inclined by at most 15°. The peripheral edge 144 of the inner sole 14 has a shape adapted to cooperate with the peripheral groove 128 of the outer sole 12.In particular, the peripheral edge 144 may comprise an end portion 146 forming an excess thickness relative to the rest of the internal sole 14, for example an end portion 146 forming a bead as visible in FIGS. 6 and 7.

[0070] Furthermore, as mentioned above, a portion of the textile liner 100 is sandwiched between the insole 14 and the outsole 12. More specifically, as seen in Figure 6, which shows a cross-sectional view of the shoe of Figure 1, the textile liner 100 (partially shown) has a lower portion 102 that is sandwiched between the outsole 12 and the insole 14 when the shoe 1 is assembled. More specifically, the lower portion 102 of the textile liner is sandwiched between the upper face 122 of the outsole 12 and the lower face 142 of the insole 14. Furthermore, a peripheral portion 104 of the textile liner 100 is sandwiched between the peripheral edge 144 of the insole 14 and the peripheral groove 128 of the outsole 12.This peripheral portion 104, which forms the junction between the lower part 102 of the shoe and the lateral parts 106, makes it possible to ensure the connection between, on the one hand, the upper 10, and, on the other hand, the inner sole 14 and the outer sole 12. This configuration makes it possible to ensure the maintenance of the upper 10 during use of the shoe, and in particular during deformations of the outer sole, in particular during the rolling of the user's foot.

[0071] By allowing a reversible clip-on attachment between the inner sole 14 and the outer sole 12, this attachment being carried out so that a portion of the upper 10 is trapped between the two soles 12, 14, the shoe 1 according to the invention can be assembled easily, without additional elements such as glue or stitching. In addition, the shoe is easily disassembled. This reversibility of the assembly of the shoe has many advantages. Thus, the main components of the shoe can be easily separated, for example for repair purposes. Furthermore, if one or more of the components of the shoe has reached a wear limit, recycling of the components is facilitated.Furthermore, the simplicity of assembly and disassembly means that these operations can be carried out by a user himself to change one or more components of the shoe, for example to adapt the outer sole to a particular sporting practice.

[0072] Advantageously, in order to strengthen the connection between the inner sole 14 and the outer sole 12, the inner sole 14 may comprise one or more complementary attachment elements making it possible, if necessary, to ensure a more robust attachment of the inner sole 14 to the outer sole 12. Figures 8 to 10 show an example of an embodiment of the upper 10, the outer sole 12 and the inner sole 14 adapted to such a configuration.

[0073] As visible in Figure 8, the inner sole 14 may comprise two attachment elements 146, 147. Each attachment element 146, 147 is in the example intended to be inserted, reversibly, into a respective cavity 130, 131 provided in the outer sole 12, visible in Figure 9.

[0074] Each cavity 130, 131 is open and opens out at the upper surface 122 of the outer sole 12, the lower part 102 of the textile slipper 100 comprising at the level of each fastening element an opening 108, 109 (figure 10) through which each corresponding fastening element 146, 147 can extend to be inserted into the corresponding cavity.

[0075] Advantageously, as visible in Figure 8, the sole comprises at least a first attachment element 146 and a second attachment element 147. The first attachment element 146 can be arranged at a front part of the inner sole 14 (i.e., a part of the inner sole 14 intended to accommodate the forefoot of a user) and the second attachment element 147 can be arranged at a rear part of the inner sole 14 (i.e., a part of the inner sole 14 intended to accommodate the heel of a user).

[0076] Advantageously, the first fastening element 146 forms a hook oriented towards the front of the shoe, and the second fastening element 147 forms a hook oriented towards the rear of the shoe. Thus, as visible in FIG. 8, the first fastening element 146 comprises a first portion 146a forming a projection extending from the lower surface of the inner sole 14, and a second portion 146b forming a projection extending from the first portion 146a towards the front of the shoe. The second fastening element 147 comprises a first portion 147a forming a projection extending from the lower surface of the inner sole 14, and a second portion 147b forming a projection extending from the first portion 147a towards the rear of the shoe. The cavities 130, 131 formed in the outer sole each have a shape compatible with the corresponding fastening element 146, 147.

[0077] The first attachment element 146 and the second attachment element 147 and the cavities 130, 131 thus have a configuration requiring that the two attachment elements be engaged in their respective cavities 130, 131 by a relative movement with respect to the outer sole in opposite directions.

[0078] This configuration ensures a robust connection between the inner sole 14 and the outer sole 12. Furthermore, because the first attachment element 146 must be engaged by a relative movement (of the inner sole 14 relative to the outer sole 12) towards the front, and the second attachment element 147 must be engaged by a relative movement towards the rear, the connection between the two soles 12, 14 is maintained even during significant deformations of the shoe occurring during the rolling of the foot.

[0079] In one embodiment, the peripheral edge 126 of the outsole 12 may comprise one or more shoe reinforcement elements from among the following reinforcement elements:

[0080] - a heel counter 132, covering a part of the upper located at the rear of the shoe rear part of the upper;

[0081] - a front end reinforcement 133, covering a part of the upper located at the front of the shoe;

[0082] - lateral reinforcements 134, which can include openings for the passage of laces.

[0083] The peripheral edge 126 of the outer sole 12 may comprise at least one flexing notch 126 at a portion of the sole corresponding to the forefoot. Such a notch makes it possible to facilitate the deformation of the outer sole 12, and therefore of the shoe as a whole, during the rolling of the foot.

[0084] As mentioned above, the outsole 12 may comprise a midsole 12a and a wear sole 12b. In the example of FIGS. 1 to 7, the midsole 12a and the wear sole 12b are secured to each other by clipping. The assembly (and therefore the disassembly) of the outsole 12, and therefore of the entire shoe 1, is therefore carried out without tools or additional elements such as glue or stitching.

[0085] The outer sole 12 may be produced by molding, in particular by injection molding. In this case, the outer sole 12 is advantageously obtained by molding at least one polymer material, for example an elastomeric polymer such as ethylene-vinyl acetate, or EVA.

[0086] The outsole 12 may alternatively be produced using an additive manufacturing process, for example using a 3D printer. In this case, all of the elements constituting the outsole 12, i.e. the body 120, the peripheral edge 126 and, where appropriate, the reinforcing elements 132, 133, 134, may be made in one piece. In the case where the outsole 12 comprises an intermediate sole 12a and an outsole 12b, these two elements may be assembled as described above, or, alternatively, be produced in a single piece, either by molding or by additive manufacturing. When the outsole 12 is produced using an additive manufacturing process, it may be produced using a polymer material such as polyurethane.

[0087] An example of production of the outer sole 12 using an additive manufacturing process is described below, in relation to figures 14 to 16.

[0088] As seen in Figures 14 to 16, the body 120 of the outer sole 12 comprises an internal structure 120a formed by a three-dimensional lattice structure (or lattice structure), formed on the basis of elementary patterns 2 (Figures 15 and 16). The internal structure 120a is surrounded by an external structure 120b, or external skin 120b, which is in the example partially formed by a lattice structure, for example on the basis of elementary patterns of triangular shape.

[0089] As seen in Figure 15, which is a partial cross-sectional view of the body 120 of the outer sole 12, the internal structure 120a is advantageously connected to the external structure 120b via an intermediate structure 120c, in the example a three-dimensional lattice structure. The intermediate structure 120c, or connecting structure, provides the junction between the internal structure 120a and the external structure 120b. The intermediate structure 120c is in the example a three-dimensional lattice structure, comprising connecting beams 140. Each connecting beam 140 connects a node of an elementary pattern 2 (an elementary pattern comprising beams, a node connecting at least two beams together) to the external structure 120b.Providing an intermediate structure 120c makes it possible to ensure a junction between the internal structure 120a and the external structure 120b, this junction respecting, on the one hand, the mechanical behavior specific to the internal structure 120a, and, on the other hand, the desired visual appearance of the external structure. Providing such an intermediate structure 120c makes it possible in particular to avoid the alteration, or at least an excessive alteration, of the elementary patterns which would be located at the interface between the internal structure 120a and the external structure 120b in the absence of an intermediate structure. Indeed, the absence of a connecting structure could require truncating a significant part of numerous elementary patterns, and thus alter the overall mechanical behavior of the internal structure 120a. The connecting structure 120c also makes it possible to avoid excessively large aggregates of material which could harm the mechanical behavior of the internal structure 120a.

[0090] In the example, the lattice structure of the internal structure 120a is formed by the repetition of an elementary pattern of vinyl type, this elementary pattern being shown in perspective in Figure 16. The use of this pattern makes it possible to give the internal structure 120a the desired properties of elasticity, deformability, damping and durability to give the sole 12 the desired mechanical behavior. The internal structure 120a may however be formed by a lattice structure comprising other elementary patterns or comprising several types of elementary patterns. In particular, the internal structure 120a may comprise zones formed by the repetition of different patterns, with the aim of giving the sole 12 damping, energy restitution and resistance properties which vary depending on the zone considered, or even depending on other criteria.Without limitation, the following basic patterns may be used: diamond pattern, octagonal edge pattern, octagonal vertex pattern, tetrahedral pattern, etc.

[0091] The mechanical characteristics of the lattice structure of the internal structure 120a can be adapted in particular by modifying parameters of the elementary pattern, among which are in particular the following parameters:

[0092] - size of the elementary pattern and number of repetitions on the axis considered (axes x, y, z visible in figure 16); - the beam diameter, which is fixed mainly according to the desired rigidity for each beam: it is for example between 0.5 and 5 mm, or between 1 and 3 mm;

[0093] - the size of the nodes, a node being defined as the intersection of at least two beams: the size of a node is for example between 100% and 130% of the diameter of the beams joining the node, or between 105% and 125%, or even between 110% and 120%;

[0094] - radius of curvature at the intersection between two or more beams: for example, it is between 1 and 5 mm, or between 2 and 3 mm. Preferably, the radius of curvature is such that it is equal to the beam diameter multiplied by a factor between 1 and 2, and for example equal to 1.5.

[0095] An elementary pattern 2 of the vinyl type is visible in Figure 16. It is an elementary three-dimensional structure, comprising a plurality of elementary structures 20 in the shape of a hexagon, each elementary structure 20 thus comprising six beams 22, some of these beams being common to at least two elementary structures. Nodes 24 connect two or more beams 22.

[0096] The elementary pattern 2, whether of the vinyl type or any other type, can be modified by varying several parameters, such as the size and number of repetitions in each x, y and z direction, the beam diameter 22, the size of the nodes 24 or the radius of curvature at the intersection. The geometry based on hexagon shapes of this elementary pattern gives a lattice structure a high capacity for shock absorption as well as good energy restitution, and can therefore be particularly suitable for the production of sports shoe soles or absorption elements for personal protection such as knee pads.

[0097] As seen in Figures 7 and 8, the body 120 of the outer sole 12 may comprise a partially or completely solid external structure 120b.

[0098] The inner sole 14 may be produced by molding, in particular by injection molding. Alternatively, the inner sole 14 may be produced by stamping or by an additive manufacturing process.

[0099] Advantageously, the textile slipper 100 is made by knitting. As shown in Figure 11, the textile slipper 100 can be knitted so as to comprise a double thickness of textile. For this purpose, the textile slipper being manufactured is knitted so as to produce an external part 100a and an internal part 100b, the external and internal parts being linked together at least at the level of an opening 100c for insertion of the foot. The internal part 100b is then turned over, to be arranged inside the external part 100a, to obtain the textile slipper 100 shown in Figure 12. This textile slipper is advantageously shaped while hot, for example by thermocompression on a template. The shaping makes it possible to define an internal volume of the textile slipper 100 making it possible to take into account the volume necessary for the insertion of the internal sole 14 and the foot of a user.In order to heat-shape the textile slipper 100, the latter comprises at least in part thermofusible threads, and / or at least one thermoformable film. When the textile slipper comprises a thermoformable film, the latter is arranged so as to allow the preforming of the textile slipper at the level of the part of the textile slipper which is sandwiched between the inner and outer soles. This arrangement guarantees the rigidity necessary to ensure optimal positioning of the inner sole inside the textile slipper, as well as increased abrasion resistance for better durability of the assembly. Advantageously, the inner part 100b and the outer part 100a of the textile slipper 100 have different thicknesses from each other, and / or have different thicknesses locally.

[0100] When the inner sole 14 comprises fastening elements 146, 147 as described above, a final additional manufacturing step of the textile slipper consists of providing the openings 108, 109 (figure 13), which are intended to allow the passage of the fastening elements 146, 147.

[0101] When the textile slipper 100 is finished, the assembly of the shoe 1 is carried out simply by inserting the inner sole 14 into the textile slipper 100 in order to connect the inner sole 14 to the outer sole 12 by clipping. When the sole 14 comprises fastening elements 146, 147, it is necessary to first engage the fastening elements 146, 147 in their respective cavities 130, 131 in order to finalize the clipping of the two soles 12, 14.

[0102] Figure 17 illustrates an example of an inner sole 14, comprising a peripheral edge 144 whose thickness is less than the rest of the thickness of the inner sole 14. Preferably, the difference between the thickness of the peripheral edge and the thickness of the sole near the peripheral edge is at least 0.5 mm. Preferably, the thickness of the peripheral edge 144 is between 1 and 4 mm, or is between 2 and 3 mm. The width I of the peripheral edge, which may be constant or variable along the peripheral contour of the inner sole 14, is for example between 2 and 6 mm, and preferably between 2.5 and 5.5 mm.

[0103] Figure 18 is a schematic view showing the peripheral groove 128 of the outer sole 12. In the example of Figure 18, the peripheral groove 128 is shaped so that a connecting portion 128a between the groove 128 and an upper part 126a of the peripheral edge 126 has a profile as close as possible to a sharp edge. Such a configuration improves the rigidity of the peripheral edge 126 locally, and improves the strength of the assembly between the inner sole 14 and the outer sole 12. In the example, the connecting portion 128a has a radius of curvature R of between 0.1 and 1 mm, and in particular of between 0.2 and 0.6 mm. Preferably, the height h of the upper part 126a of the peripheral edge 126 (i.e. the distance between the connecting portion 128a and the free end of the peripheral edge 126) is between 1 and 4 mm, and in particular between 1.5 and 2.5 mm.This height of this part of the peripheral edge located above the groove 128 also contributes to obtaining rigidity allowing good holding of the assembly between the internal sole 14 and the external sole 12. Advantageously, in order to further improve this rigidity, the internal surface 128b of the groove 128 has ribs 128c spaced apart from each other, over at least a part, and, preferably, over the entire contour of the groove 128.

[0104] Figures 19 and 20 partially illustrate the outsole 12b and the outsole 12, the outsole 12b being attached by form cooperation (by clipping) to the midsole 12a. In order to ensure an attachment that is reversible, robust and secure, the outsole 12b comprises, in its front part, a flexible attachment tab 150. The attachment tab 150 comprises a locking portion 152 intended to cover a portion of the upper surface of the midsole 12a. Thus, as seen in Figure 20, when the outsole 12b and the midsole 12a are assembled, the locking portion 152 is located on or at the upper surface 122 of the outsole 12.Thus, when the shoe 1 is assembled, the locking portion 152 is sandwiched, and therefore trapped, between the assembly of the upper 10 and the inner sole 14 on the one hand, and the midsole 12a, on the other hand. Being thus sandwiched, the locking portion 152 cannot be released as long as the inner sole 14 and the outer sole 12 are secured, or, in other words, as long as the shoe is in the use configuration. The outsole 12b is thus locked to the midsole 12a as long as the shoe is in the use configuration (at the front thanks to the fixing tab 150, and, at the rear, thanks to the inclined shape of the heel, that is to say the tapered shape of the heel, which allows the rear part of the outsole 12b to be retained on the midsole 12a).To separate the outsole 12b from the midsole 12a, it is necessary to first separate the outer sole 12 from the inner sole 14 to gain access to the fixing tab 150 and extract the locking portion 152. Advantageously, the midsole 12a may comprise a cavity 122a formed at the upper surface 122, the cavity 122a being configured to receive the locking portion 152 of the fixing tab 150. Advantageously, the peripheral edge 126 has a notch 126b for receiving a connecting portion 154 of the fixing tab 150. Preferably, the thickness of the fixing tab 150, and in particular of the locking portion 152, is greater than or equal to 1 mm, and less than or equal to 3 mm. The locking part 152 has a generally circular shape in the example, but other shapes are of course possible.

Claims

CLAIMS 1. Shoe (1), in particular sports shoe, comprising: - an upper (10) comprising a textile slipper (100); - an inner sole (14) arranged inside the textile slipper (100); - an outer sole (12) reversibly attached to the inner sole (14); the inner sole (14) comprising a peripheral edge (144), the outer sole (12) comprising a peripheral border (126) having a peripheral groove (128), the attachment of the outer sole (12) to the inner sole (14) being obtained by elastic fitting of the peripheral edge (144) of the inner sole (14) into the peripheral groove (128) of the outer sole (12), the part of the textile slipper (100) surrounding the peripheral edge (144) of the inner sole (14) being sandwiched between the peripheral edge (144) of the inner sole (14) and the peripheral groove (128) of the outer sole (12).

2. Shoe (1) according to claim 1, wherein the peripheral edge (126) forms a projection extending from an upper surface (122) of the outer sole (12), the peripheral groove (128) forming an open cavity opening onto an inner side of the peripheral edge (126).

3. Shoe (1) according to one of claims 1 and 2, in which the peripheral edge (144) of the inner sole (14) is engaged in the peripheral groove (128) over at least 80% of the contour of the inner sole (14) or over the entire contour of the inner sole (14).

4. Shoe (1) according to one of claims 1 to 3, in which the textile slipper (100) comprises a lower part (102) sandwiched between a lower surface (142) of the inner sole (14) and an upper surface (122) of the outer sole (12).

5. Shoe (1) according to claim 4, in which the inner sole comprises two fastening elements (146, 147), each fastening element being reversibly inserted into a respective cavity (130, 131) provided in the outer sole (12), each cavity opening at the upper surface of the outer sole (12), the lower part (102) of the slipper textile (100) comprising at each fastening element (146, 147) an opening (108, 109) through which the corresponding fastening element (146, 147) extends.

6. Shoe (1) according to claim 5, wherein one of the fastening elements (146) is arranged at a front portion of the inner sole (14) and forms a hook facing the front of the shoe, the other fastening element (147) being arranged at a rear portion of the inner sole (14) and forming a hook facing the rear of the shoe (1).

7. Shoe (1) according to one of the preceding claims, in which the outer sole (12) comprises an intermediate sole (12a) and a wear sole (12b), the wear sole (12b) being reversibly fixed to the intermediate sole (12a), in particular by clipping.

8. Shoe (1) according to the preceding claim, in which the outsole (12b) comprises in the front part a flexible fixing tab (150), the fixing tab (150) comprising a locking part (152) which is sandwiched between, on the one hand, the inner sole (14) and the upper (10) and, on the other hand, the midsole (12a), when the shoe is assembled.

9. Shoe (1) according to the preceding claim, in which the midsole (12a) has a tapered shape in the rear part ensuring retention of the outsole (12b) when the shoe is assembled.

10. Shoe (1) according to one of the preceding claims, in which a connecting portion (128a) between the groove (128) and an upper part (126a) of the peripheral edge (126) has a radius of curvature (R) of between 0.1 and 1 mm, and for example of between 0.2 and 0.6 mm.

11. Shoe (1) according to one of the preceding claims, in which the height (h) of an upper part (126a) of the peripheral edge (126) is between 1 and 4 mm, and for example between 1.5 and 2.5 mm.

12. Shoe (1) according to one of the preceding claims, in which an internal surface (128b) of the groove (128) has ribs (128c) spaced apart from each other over at least a part, and preferably over the entire contour of the groove (128).

13. Shoe (1) according to one of the preceding claims, in which the peripheral edge (126) comprises one or more reinforcing elements of the shoe (1) among the following reinforcing elements: - a heel counter (132), covering a part of the upper (10) located at the rear of the shoe rear part of the upper (10); - a front end reinforcement (133), covering a part of the upper (10) located at the front of the shoe; - one or more lateral reinforcements (134).

14. Shoe (1) according to one of the preceding claims, in which the peripheral edge (126) of the outer sole (12) comprises at least one flex notch at a part of the sole corresponding to the forefoot.

15. Shoe (1) according to one of the preceding claims, in which the textile slipper (100) is made by knitting.

16. Shoe (1) according to the preceding claim, in which the textile slipper (100) comprises an external part (100a) and an internal part (100b), the external and internal parts being linked together at least at the level of an opening (100c) for insertion of the foot.

17. Shoe (1) according to the preceding claim, in which the inner sole (14) is arranged inside the inner part (100b) of the textile slipper (100).

18. Shoe (1) according to one of claims 16 and 17, in which the internal part (100b) and the external part (100a) of the textile slipper (100) have different thicknesses.

19. Shoe (1) according to one of the preceding claims, in which the outer sole (12) is produced by means of an additive manufacturing process.

20. Method for manufacturing a shoe (1) according to one of the preceding claims, the method comprising the steps of: - knit a textile slipper (100); - insert the inner sole (14) inside the textile slipper (100); - fix the outer sole (12) to the inner sole (14).

21. Manufacturing method according to the preceding claim, comprising a step of shaping the textile slipper (100) before the step of inserting the inner sole (14), the shaping step being carried out by hot forming the textile slipper (100) on a form, the textile slipper (100) comprising thermofusible fibers.

22. Manufacturing method according to one of claims 20 and 21, in which the step of knitting a textile slipper is carried out so as to obtain a textile slipper (100) comprising an external part (100a) and an internal part (100b) linked together at an opening (100c) for introducing the foot.

Images