WO2020109293A1

WO2020109293A1 - Sole construction for a sports shoe

Info

Publication number: WO2020109293A1
Application number: PCT/EP2019/082546
Authority: WO
Inventors: Axel PÖLZLEITNER; Hannes Kogler
Original assignee: Fischer Sports Gmbh
Priority date: 2018-11-27
Filing date: 2019-11-26
Publication date: 2020-06-04
Also published as: EP3659456A1; EP3886631A1; EP3886631B1

Abstract

The invention relates to a sole construction (1) for a sports shoe, more particularly a cross-country ski- or telemark boot, the sole construction (1) extending substantially between a connection face (2) for connection to the sports shoe and a standing face (3) for standing on a surface, a part of the standing face (3) forming a contact face (4) for making contact with a ski or ski binding, the sole construction having: a structural component (5) made of a first material, a section of the surface of the structural component (5) forming the connection face (2); a covering (6) made of a second material, the covering (6) covering the structural component (5) at least partially towards the standing face (3); a connection element (7) for co-operating with a retaining device, more particularly the ski binding; standing projections (9) towards the standing face (3), the standing projections (9) being interrupted by at least one transverse groove (14) from the standing face (3) in the direction of the connection face (2); wherein in a cored-out region (11) of the sole construction (1), depressions (12) are provided in standing projections (9) and extend from the standing face (3) in the direction of the connection face (2) and form cavities (13) open towards the standing face (3).

Description

Sole construction for a sports shoe

The invention relates to a sole structure for a sports shoe, in particular a cross-country or telemark shoe, wherein the sole structure essentially extends between a connection surface for connection to the sports shoe and a standing area to the stand on a surface, part of the stand area being a contact area Coming into contact on a ski, in particular a cross-country or telemark ski, or a ski binding, in particular a cross-country or telemark ski binding, has a covering, comprising a structural component from a first material, a portion of the surface of the structural components forming the connecting surface made of a second material, the covering at least partially covering the structural component towards the stand area, a connecting element to interact with a holding device, in particular the ski binding, stand projections towards the stand area, the stand projections of at least one transverse groove from the stand area he in the direction of the connecting surface are interrupted and lower surfaces of the protrusions lie substantially in the base surface. Furthermore, the invention relates to a sports shoe, in particular a cross-country or telemark shoe.

The prior art discloses a number of such sole structures. These should be designed in such a way that, for example, cross-country skiing shoes can be attached to a cross-country ski binding in the toe area, so that lateral stability is achieved for ski guidance and the heel can be raised at the same time. Cross-country soles are generally designed flexibly in the front area so that the foot can be rolled off. At the same time, the soles should be designed in such a way that they have a certain stability since Lich and torsion in order to be able to better transfer tax forces to the ski. However, not only should these requirements be met, but at the same time sole structures should also be lightweight and economically inexpensive to manufacture. Variants of such sole structures are e.g. proposed by EP 1559337 B1 and EP 3195748 A1.

Sole structures for a sports shoe, especially a long- However, running or telemark shoes not only fulfill the purpose as a connection to a ski binding and thus for skiing, but should also be suitable for walking outside of use in skiing, for example off-piste and without use on a ski. Advantages include a wide footprint, good rolling properties, sufficient traction and slip resistance and good wear resistance on a wide variety of surfaces such as snow, ice, asphalt, gravel, rock, tiles, etc.

EP 1 559 337 B1 discloses an outsole for a sports shoe, consisting of a rear, a shoe heel comprising the section and a front section. The outsole is consistently made of relatively hard material and ver see on the running side with a tread made of relatively soft material. Longitudinal and transverse grooves are formed on the barrel side, the base of the longitudinal and transverse grooves being defined by the front and possibly also the rear section of the outsole consisting of relatively hard material.

Furthermore, DE 20 2011 110 458 U1 shows a shoe with an outer sole structure which comprises a core made of a first material, the core comprising a plate which delimits a connecting surface and projections which protrude from the plate in the direction of a free surface, includes. The outer sole structure comprises a covering of a second material which partially covers the plate and the protrusions. Furthermore, the outer sole structure has a circumferential lip which runs along a lateral side, a rear end and a medial side, the lip being a subsection of the covering.

Disadvantageously, these sole structures require a large amount of material and are therefore very heavy. In addition, they have an insufficient outsole structure, which results in insufficient slip resistance.

The invention has for its object to provide a sole structure for a sports shoe and a sports shoe that avoids or reduces at least one of the disadvantages mentioned above and / or as many of the advantageous eggs properties. In particular, a sole structure or sports shoe is to be proposed which, with good skiing properties when used on a ski and with low weight, has improved walking properties on normal ground, ie without a ski.

This is achieved by a sole structure as described at the outset, wherein according to the invention, recesses are provided in standing projections in a core area of the sole structure, which extend from the standing surface in the direction of the connecting surface and form open cavities to the standing surface. This is also achieved by a sports shoe, in particular a cross-country or telemark shoe, which has a sole construction according to the invention.

Removing the sole structure is a means of reducing weight. Cores are usually made from the connection surface towards the stand area. Standvor can have protrusions, ie they have open cavities to the connecting surface. The connecting surface can thus be interrupted by these cavities, on the other hand, the connecting surface can also cover one, several or all of these cavities. In the sole structure according to the invention, however, the sole structure in a core area of the sole structure (also or only) has core protrusions in the form of depressions or core protrusions from the base surface in the direction of the connecting surface. Thus, the sole structure not only has at least one transverse groove as cores on the base surface, but also the stand projections themselves have been removed. In this way, areas can advantageously also be removed from the core that cannot be reached on the connection surface side due to the undercut present, or at least cannot be removed from the production process. Furthermore, the necessary connecting surface in the edge region of the sole structure can advantageously be simply maintained on the connecting surface side. The open cavities of the depressions are particularly limited to the connecting surface. The lateral delimitation of the depressions, ie their side walls, can differ from the lateral delimitation, ie the side walls or part of the side walls, of the projections be educated. The depressions or the open cavities formed by them break through in particular lower surfaces of the standing projections.

Manufacturing the sole structure from at least two materials improves walking behavior, in particular slip resistance, and longevity. The portion of the surface of the structural component that forms the connection surface can be essentially flat, in particular except for an edge region. The covering preferably also covers the structural component towards the lateral edges. To improve walking ability or increase slip resistance, the surface of the covering can e.g. matte finish led. The covering can be designed, for example, with roughness depths with a mean roughness value of 20 to 200 m, in particular 60 to 120 m. A geometric structure can also be introduced in a targeted manner, e.g. a pattern of intersecting grooves with a groove depth of between 0.5 and 1 mm, or similar patterns, as are known from applications of street shoes.

The longitudinal direction of the sole construction runs from a heel section to a toe section; the transverse direction transverse to the longitudinal direction. The at least one transverse groove runs essentially in the transverse direction of the sole structure, but it can be curved. A transverse groove can have angles between -30 ° and 30 °, preferably between -15 ° and 15 °, to the longitudinal direction over its course. The at least one transverse groove can be a flexible notch or serve as a flexible notch. The at least one transverse groove can serve to improve the flexibility, ie the flexibility, of the sole structure in the longitudinal direction. Preferably, a lot of number of transverse grooves is provided which interrupt the standing projections from the standing surface in the direction of the connecting surface, where a transverse groove can be provided, for example, every 1 to 4 cm. In the coring area, the depressions in cross section transverse to the base preferably have an area which corresponds to more than 50%, preferably more than 50%, of the area of the respective stand protrusion. The side walls formed from the outer surfaces of the projecting projections to the depressions are preferably thinner than 5 mm, particularly before thinner than 3 mm. According to a preferred embodiment, a cavity which is open towards the connecting surface is formed in at least one projection on the connecting surface. An open cavity is preferably formed in all of the projecting projections. The cavity can essentially extend from the standing surface (down to the thickness of the covering and the structural component) to the connecting surface. In particular in the case of standing projections which have depressions, the open cavities to the connecting surface can have a smaller downward extent. In particular, an upper boundary of the (or some of) the open cavities to the standing surface of the depressions can be formed by a lower boundary of the open cavities towards the connecting surface of the (corresponding) standing projections. An upper limit of the (or some of) the open cavities of the depressions can also lie in the connecting surface. The terms below and above refer to the normal position of use of the sole structure in connection with a shoe; ie below means in the direction of the ground when the shoe is standing, above means in the direction of the rest of the shoe structure or the wearer.

It is advantageous if the coring area comprises that area of the standing area which is not part of the contact area or is not included in the contact area. The contact surface is, in particular, a central section in the transverse direction of the sole structure. The contact area has a width in the transverse direction of the sole structure of preferably between 2 and 10 cm, particularly preferably between 4 and 8 cm, even more preferably between 4.5 and 5.5 cm. The fact that the stand projections in the area of the contact surface have no depressions or protrusion projections allows the stand on the ski or the ski binding to be improved.

In a preferred embodiment, the stand projections of at least one, preferably two, (essentially running in the longitudinal direction of the sole structure) longitudinal groove (s) from the standing surface in the direction of the connecting surface are interrupted. The slip resistance of the shoe in the transverse direction can thus be improved. The longitudinal grooves are preferably in the region of the contact surface. According to a preferred embodiment, the transverse grooves and / or the longitudinal grooves (and / or the open cavities of the recesses) have a cross section tapering in the direction of the connecting surface. On the one hand, production can be simplified because the sole structure can be demolded directly. On the other hand, less dirt gets caught in the recesses on the underside. When the sole structure is bent, the recesses also expand, which further promotes the ejection of dirt.

In a preferred embodiment, the first material has a greater hardness than the second material, in particular based on the Shore D hardness and the Shore A hardness, with the first material in particular having a hardness to be determined according to Shore D and the second material has a hardness to be determined according to Shore-A. The first material is advantageously provided to ensure sufficient lateral strength and torsional rigidity and to embed the connecting element. For example, the first material can have a Shore D hardness of between 40 Shore D and 80 Shore D, preferably between 50 Shore D and 60 Shore D, even more preferably between 53 Shore D and 56 Shore. D. The second material can, for example, have a Shore A hardness of between 50 Shore A and 100 Shore A, preferably between 65 Shore A and 85 Shore A, more preferably between 70 Shore A and 80 Shore A , exhibit. The structural component made of the first material thus ensures the necessary rigidity. The structural component preferably has the connecting element. The covering made of the second, softer material preferably extends over the entire footprint or the entire underside of the sole structure and improves the stability.

The connecting element preferably has a transverse axis connected to the structural component. Such transverse axes have proven themselves for connection to the ski binding and enable good power transmission. Furthermore, the power transmission is improved by the connection of the transverse axis to the structural component, especially when the first material is harder. According to a preferred embodiment, the side surfaces which limit the sole structure in both transverse directions each have an angle to the base surface on the sole structure side which is less than 90 °, preferably between 70 and 88 °, particularly before between 75 and 85 °. As a result, a braking effect of the side surfaces can be prevented, for example when the ski is tilted and the sole structure is prevented. The side surfaces should be essentially smooth so that they do not have a braking effect when they come into contact with the ground or snow when skiing or running (e.g. when the ski is tilted). The side surfaces can be interrupted by the at least one transverse groove; however, they can also limit the at least one transverse groove and be continuous. It can also be only the Seitenflä surface that limits the sole structure on the inside instep side, or the side surface that delimits the sole structure on the outside instep side, have an angle to the footprint on the sole structure side that is less than 90 °, preferably between 70 and 88 °, especially before between 75 and 85 °.

According to an advantageous embodiment, at least one, preferably both, edge (s) formed by the standing surface and the side surfaces is rounded off, preferably rounding an arc of a circle with a radius between 0.3 and 2.5 mm, preferably between 0.5 and 1.5 mm, speaks ent. Thus, the resistance that the sole structure can exert against an underground, for example a cross-country trail, and thus reduces its braking effect.

It is advantageous if edges on the standing surface, in particular re (essentially transverse) transverse edges, the standing projections and / or depressions (and / or transverse grooves) have radii of less than 0.5 mm, preferably less than 0.3 mm, in particular preferably less than 0.2 mm. As a result, the traction of the sole structure with the ground can be improved, for example when walking (without the straps on).

In a preferred embodiment, the standing surface has radii of more than 0.3 mm, preferably more than 0.5 mm, even more preferably more, from the edges of the standing projections and / or the depressions (and / or the transverse grooves and / or the longitudinal grooves) facing away from the stand than 0.7 mm. As a result, the respective recesses are self-cleaning; Dirt is less likely to get caught in them, the sticking of stones is counteracted and dirt can be more easily ejected, for example when the sole is bent.

It is advantageous if the at least one transverse groove has a cross section which widens inwards from the side surfaces of the sole structure, which limit the sole structure in both transverse directions. Braking edges on the side surfaces of the sole structure can thus be avoided. The transverse grooves can thus be tapered towards the side surfaces, i.e. each have a cross section decreasing approximately from the center of the sole structure to the side surfaces. In this way, edges on the side surfaces can be reduced, with the at least one transverse groove also acting in the edge region.

In a preferred embodiment, the covering covers the

Structural component to the stand area essentially completely and / or the covering has a thickness of 1 to 3 mm, preferably 1.5 to 2.5 mm. The weight can thus be further reduced or the traction with the surface can be improved. The covering can also prevent the structural components from wearing out.

It is advantageous if a lower surface adjoining a side surface has at least one of the standing projections inclined upward and includes an angle to the standing surface which is greater than 0 °, preferably between 0.3 ° and 10 °, particularly preferably between 0 , 5 ° and 5 °, this preferably starting from one, preferably two, essentially longitudinally running edge (s) of the standing projections. In this way, when the sole structure is tilted, traction with the ground can be avoided or larger angles of the inclined position of the ski can be made possible.

Referring to the sports shoe according to the invention, it is geous before if the sole structure is glued to the connecting surface with the rest of the sports shoe. This enables a particularly stable connection to the sole structure. The invention is explained in more detail below with reference to a preferred embodiment shown in the figures, which is not intended to be limiting of the invention. The figures show in detail:

Figure 1 shows a preferred embodiment of a sole structure obliquely from above.

Figure 2 shows the same embodiment of the sole structure as Figure 1 from above.

Figure 3 shows the same embodiment of the sole structure as Figure 1 in a cross section.

4 shows the same embodiment of the sole structure as FIG. 1 in a section along the plane B-B from FIG. 2;

FIG. 5 shows the same embodiment of the sole structure as FIG. 1 in a section along the plane A-A from FIG. 2;

6 shows the same embodiment of the sole structure as FIG. 1 from below;

7 shows the same embodiment of the sole structure as FIG. 1 from the front; and

Fig. 8 the same embodiment of the sole structure as Fig. 1 obliquely from below.

1 to 8 show the same preferred embodiment of a sole structure 1 from different perspectives. 1 shows the sole structure 1 obliquely from above, FIG. 2 from above, FIG. 3 in a cross section in the transverse direction, FIG. 4 in a section along the plane BB from FIG. 2, FIG. 4 in a section along plane AA from FIG. 2, FIG. 6 from below, FIG. 7 from the front and FIG. 8 obliquely from below.

The sole structure 1 is intended for a sports shoe, in particular a cross-country or telemark shoe. It extends essentially between a connection surface 2 for connection to the sports shoe and a stand area 3 to stand on an upper surface. Part of the stand area 3 forms a contact area 4 for coming into contact on a ski, in particular a cross-country or telemark ski, or a ski binding, in particular a cross-country or telemark ski binding. The sole structure 1 has a structural component 5 made of a first material, a portion of the surface of the structural component 5 forming the connecting surface 2. Furthermore, the sole structure 1 has a covering 6 made of a second material, the covering 6 covering the structural component 5 towards the base 3 or towards the base and towards the lateral edges. There is a connec tion element 7 in the form of a ver with the structural component 5 connected transverse axis 8 to cooperate with a holding device, in particular the ski binding. The sole structure 1 has standing projections 9 towards the standing surface 3, which have partially open cavities 10 in the direction of the connecting surface 2. It can be seen that lower surfaces of the open cavities 10 of the protrusions 9 in the direction of the connec tion surface 2, upper surfaces of the open cavities of the recesses or coring protrusions 12 in the direction of the stand surface 3 and vice versa, in each case the height of the position of these surfaces are different. Bottom surfaces of the standing projections 9 lie essentially in the standing area 3, however, in a recess area 11, depressions 12 of the standing projections 9 are provided from the standing area 3 in the direction of the connecting area 2, the depressions 12 forming cavities 13 which are open towards the standing area 3. The Auskernungsbe area 11 includes in particular a part of the footprint 3, which is not part of the contact surface 4. 4 shows a section in the coring area 11, FIG. 5 shows a section in the loading area of the contact area 4, where the stand projections 9 accordingly have no depressions 12. The standing projections 9 are interrupted by transverse grooves 14 from the standing surface 3 in the direction of the connec tion surface 2. Furthermore, the standing projections 9 are interrupted by two longitudinal grooves 15 from the standing surface 3 in the direction of the connecting surface 2. The transverse grooves 14 and

Longitudinal grooves 15 have a cross-section tapering in the direction of the connecting surface 2.

The first material of the structural component 5 is harder than that second material of the covering. Thus, the structural component 5 can give the sole structure 1 the necessary rigidity, while the covering 6 ensures good slip resistance when walking on an underground. The side surfaces 16, which limit the sole structure 1 in both transverse directions, each have a sole construction angle at an angle to the standing surface 3, which is between 70 ° and 90 °. Both of the footprint 3 and the side surfaces 16 ge edges 17 are rounded, the rounding one

Circular arc of a circle with a radius of essentially 1 mm corresponds. The edges 18 of the base surface of the projections 9 and the depressions 12 are relatively pointed and have radii of substantially 0.2 mm in order to enable good traction. Stuck stones and other things

To avoid dirt or to encourage it to be thrown out, on the other hand, the edges 3 of the base surface 3 facing away from the base projections 9 and the recesses 12 have radii of approximately 0.6 mm. The transverse grooves 14 have an inward direction from the side surfaces 16, i.e. in each case towards the center of the sole structure 1, widening or enlarging cross section.

The covering 6 essentially completely covers the structural component 5 towards the base 3 and has a thickness of approximately 2 mm. As can be seen in particular in FIGS. 6 and 8, lower upper surfaces of the standing projections 9 have an edge 20, starting from the water edge 20 in the direction of the side surfaces 16, the lower surfaces of the standing projections 9 are inclined upward at an angle of about 10 °.

Claims

Claims:

1. sole structure (1) for a sports shoe, in particular a cross-country or telemark shoe,

wherein the sole structure (1) extends essentially between a connecting surface (2) for connection to the sports shoe and a standing surface (3) for standing on a surface, part of the standing surface (3) having a contact surface (4) for coming into contact a ski, in particular a cross-country or telemark ski, or a ski binding, in particular a cross-country or telemark ski binding

a structural component (5) made of a first material, a section of the surface of the structural component (5) forming the connecting surface (2),

a covering (6) made of a second material, the covering (6) at least partially covering the structural component (5) towards the stand surface (3),

a connecting element (7) in order to interact with a holding device, in particular the ski binding,

Stand projections (9) towards the stand surface (3), the

Stand projections (9) of at least one transverse groove (14) from the stand surface (3) in the direction of the connecting surface (2) are interrupted and lower surfaces of the stand projections (9) are essentially in the stand surface (3),

characterized in that

Ver in a recess area (11) of the sole structure (1) Ver recesses (12) in standing projections (9) are provided, which extend from the standing surface (3) in the direction of the connecting surface (2) and to the standing surface (3) open cavities (13 ) form.

2. Sole structure (1) according to claim 1, characterized in that in at least one standing projection (9) to the connecting surface (2) open cavity (10) is formed.

3. sole structure (1) according to any one of the preceding claims, characterized in that the Auskerungsbereich (11) comprises that area of the footprint (3) that is not part of the contact surface (4).

4. Sole structure (1) according to one of the preceding claims, characterized in that the standing projections (9) of at least one, preferably two, longitudinal groove (s) (15) from the standing surface (3) in the direction of the connecting surface (2) is or are interrupted.

5. Sole structure (1) according to one of the preceding claims, characterized in that the transverse grooves (14) and / or the longitudinal grooves (15) have a cross section tapering in the direction of the connecting surface (2).

6. Sole structure (1) according to one of the preceding claims, characterized in that the first material has a greater hardness than the second material.

7. Sole structure (1) according to one of the preceding claims, characterized in that the connecting element (7) has a transverse axis (8) connected to the structural component (5).

8. sole structure (1) according to one of the preceding claims, characterized in that the side surfaces (16), which limits the sole structure (1) in both transverse directions, each have an angle to the base surface (3) on the base surface (3) which is less than 90 ° , preferably between 70 and 88 °, especially before between 75 and 85 °.

9. sole structure (1) according to any one of the preceding claims, characterized in that at least one, preferably both, from the standing surface (3) and the side surfaces (16), which limits the sole construction (1) in both transverse directions, formed Kan tein ) (17) is or are rounded, preferably the rounding speaks an arc of a circle with a radius of between 0.3 and 2.5 mm, preferably between 0.5 and 1.5 mm.

10. sole structure (1) according to any one of the preceding claims, characterized in that the base-side edges (18), in particular transverse edges, the standing projections (9) and / or Ver recesses (12) radii of less than 0.5 mm, preferably less than 0 , 3 mm, particularly preferably less than 0.2 mm.

11. Sole structure (1) according to one of the preceding claims, characterized in that the standing surface (3) facing Kan ten (19) of the standing projections (9) and / or the recesses (12) radii of more than 0.3 mm, preferably have more than 0.5 mm, more preferably more than 0.7 mm.

12. Sole structure (1) according to one of the preceding claims, characterized in that the at least one transverse groove (14) egg nen from side surfaces (16) of the sole structure (1), which limits the sole structure (1) in both transverse directions, inwards has widening cross section.

13. Sole structure (1) according to one of the preceding claims, characterized in that the covering (6) covers the structural components te (5) to the base area (3) substantially completely and / or that the covering (6) has a thickness of 1 to 3 mm, preferably 1.5 to 2.5 mm.

14. Sole structure (1) according to one of the preceding claims, characterized in that an at a side surface (16) adjacent lower surface at least one of the standing projections (9) has an inclination upwards and includes an angle to the standing surface (3), which is greater than 0 °, preferably between 0.3 and 10 °, particularly preferably between 0.5 and 5 °, this preferably being outside one, preferably two, essentially longitudinally running edge (s) (20) of the Stand projections (9).

15. sports shoe, in particular cross-country or telemark shoe, characterized by a sole structure (1) according to one of the preceding claims, wherein preferably the sole structure (1) on the connecting surface (2) is glued to the rest of the sports shoe.