US-12616276-B2 - Shoe sole and shoe

Abstract

A shoe sole includes a sole body, and a reinforcing structure portion made up of a first reinforcing member and a second reinforcing member that are made of different members of different materials from each other. The first reinforcing member includes a first bar, and the second reinforcing member includes a second bar. The first bar is located on a medial foot side from the second bar. A portion of the first bar disposed in a midfoot portion extends along an oblique direction crossing both a front-rear direction and a left-right direction, and a portion of the second bar disposed in the midfoot portion extends crossing the left-right direction. The portion of the first bar disposed in the midfoot portion and the portion of the second bar disposed in the midfoot portion are located at least in part with a distance therebetween.

Inventors

• Tatsuya Ishikawa
• KOJI OTOBE
• Akane YONEDA
• Tomoichiro OZAKI
• Hiroyuki Ichikawa
• Takahiro Matsuura

Assignees

• ASICS CORPORATION

Dates

Publication Date

20260505

Application Date

20210407

Claims (20)

1. 1 . A shoe sole in which a forefoot portion for supporting a toe portion and a ball portion of a foot of a wearer, a midfoot portion for supporting an arch portion of the foot of the wearer, and a rearfoot portion for supporting a heel portion of the foot of the wearer are provided to be connected along a front-rear direction that is a direction adapted to coincide with a foot length direction of the foot of the wearer, the shoe sole comprising: a sole body located continuously from the forefoot portion to the rearfoot portion; and a reinforcing structure portion assembled on the sole body, wherein the reinforcing structure portion has a first reinforcing member formed of a material higher in rigidity than a material forming the sole body, and a second reinforcing member formed of a material higher in rigidity than the material forming the sole body, the second reinforcing member being separate from the first reinforcing member, the first reinforcing member includes a first bar with at least a portion of the first bar disposed in the midfoot portion, the second reinforcing member includes a second bar with at least a portion of the second bar disposed in the midfoot portion, the first bar is located on a medial foot side of the sole body from the second bar in a left-right direction that is a direction coinciding with a foot width direction of the foot of the wearer when the shoe sole is worn, the portion of the first bar disposed in the midfoot portion extends along an oblique direction crossing both the front-rear direction and the left-right direction such that a front end of the portion of the first bar disposed in the midfoot portion is located on a lateral foot side of the sole body in the left-right direction and a rear end of the portion of the first bar disposed in the midfoot portion is located on the medial foot side in the left-right direction, the portion of the second bar disposed in the midfoot portion extends crossing the left-right direction such that a front end of the portion of the second bar disposed in the midfoot portion is located on the lateral foot side in the left-right direction, wherein there is a distance between the portion of the first bar disposed in the midfoot portion and the portion of the second bar disposed in the midfoot portion, wherein the first and second reinforcing members are entirely separated by an interposed portion which protrudes from the sole body and is disposed between the first bar and the second bar such that the first and second reinforcing members are not in contact with each other, and wherein the material forming the first reinforcing member and the material forming the second reinforcing member are different.
2. 2 . The shoe sole according to claim 1 , wherein the first bar extends crossing a portion corresponding to a metatarsophalangeal joint of the foot of the wearer when the shoe sole is worn, such that a front end of the first bar is located in the forefoot portion.
3. 3 . The shoe sole according to claim 1 , wherein the first reinforcing member includes a base disposed along an edge portion of the midfoot portion on the medial foot side in the left-right direction, and the first bar is connected to the base.
4. 4 . The shoe sole according to claim 1 , wherein the second bar extends crossing a portion corresponding to a metatarsophalangeal joint of the foot of the wearer when the sole is worn, such that a front end of the second bar is located in the forefoot portion.
5. 5 . The shoe sole according to claim 1 , wherein the portion of the second bar disposed in the midfoot portion extends along an oblique direction crossing the front-rear direction such that a rear end of the portion of the second bar disposed in the midfoot portion is located on the medial foot side in the left-right direction.
6. 6 . The shoe sole according to claim 1 , wherein the portion of the second bar disposed in the midfoot portion extends along the front-rear direction such that a rear end of the portion of the second bar disposed in the midfoot portion thereof is located on the lateral foot side in the left-right direction.
7. 7 . The shoe sole according to claim 1 , wherein the second reinforcing member includes a base disposed along an edge portion of the midfoot portion on the lateral foot side in the left-right direction, and the second bar is connected to the base.
8. 8 . The shoe sole according to claim 1 , wherein at least one part of the first reinforcing member and at least one part of the second reinforcing member are located so as to cover an outer surface of the sole body.
9. 9 . The shoe sole according to claim 1 , wherein at least one part of the first reinforcing member and at least one part of the second reinforcing member are embedded in the sole body.
10. 10 . The shoe sole according to claim 1 , wherein a part of the first reinforcing member overlaps with a part of the second reinforcing member when viewed in an up-down direction orthogonal to both the front-rear direction and the left-right direction.
11. 11 . A shoe comprising: the shoe sole according to claim 1 ; and an upper located above the shoe sole.
12. 12 . A shoe sole in which a forefoot portion for supporting a toe portion and a ball portion of a foot of a wearer, a midfoot portion for supporting an arch portion of the foot of the wearer, and a rearfoot portion for supporting a heel portion of the foot of the wearer, are provided to be connected along a front-rear direction that is a direction adapted to coincide with a foot length direction of the foot of the wearer, the shoe sole comprising: a sole body located continuously from the forefoot portion to the rearfoot portion; and a reinforcing structure portion assembled on the sole body, wherein the reinforcing structure portion has a first reinforcing member formed of a material higher in rigidity than a material forming the sole body, and a second reinforcing member formed of a material higher in rigidity than the material forming the sole body, the second reinforcing member being separate from the first reinforcing member, the first reinforcing member includes a first bar with at least a portion of the first bar disposed in the midfoot portion, the second reinforcing member includes a second bar with at least a portion of the second bar disposed in the midfoot portion, the first bar is located on a medial foot side of the sole body from the second bar in a left-right direction that is a direction coinciding with a foot width direction of the foot of the wearer when the shoe sole is worn, the portion of the first bar disposed in the midfoot portion extends crossing the left-right direction such that a rear end of the portion of the first bar disposed in the midfoot portion is located on the medial foot side in the left-right direction, the portion of the second bar disposed in the midfoot portion extends along an oblique direction crossing both the front-rear direction and the left-right direction such that a front end of the portion of the second bar disposed in the midfoot portion is located on a lateral foot side of the sole body in the left-right direction and a rear end of the portion of the second bar disposed in the midfoot portion is located on the medial foot side in the left-right direction, wherein there is a distance between the portion of the first bar disposed in the midfoot portion and the portion of the second bar disposed in the midfoot portion, wherein the first and second reinforcing members are entirely separated by an interposed portion which protrudes from the sole body and is disposed between the first bar and the second bar such that the first and second reinforcing members are not in contact with each other, and the material forming the first reinforcing member and the material forming the second reinforcing member are different.
13. 13 . The shoe sole according to claim 12 , wherein the second bar extends crossing a portion corresponding to a metatarsophalangeal joint of the foot of the wearer when the shoe sole is worn, such that a front end of the second bar is located in the forefoot portion.
14. 14 . The shoe sole according to claim 12 , wherein the second reinforcing member includes a base disposed along an edge portion of the midfoot portion on the lateral foot side in the left-right direction, and the second bar is connected to the base.
15. 15 . The shoe sole according to claim 12 , wherein the first bar extends crossing a portion corresponding to a metatarsophalangeal joint of the foot of the wearer when the shoe sole is worn, such that a front end of the first bar is located in the forefoot portion.
16. 16 . The shoe sole according to claim 12 , wherein the first reinforcing member includes a base disposed along an edge portion of the midfoot portion on the medial foot side in the left-right direction, and the first bar is connected to the base.
17. 17 . The shoe sole according to claim 12 , wherein at least one part of the first reinforcing member and at least one part of the second reinforcing member are located so as to cover an outer surface of the sole body.
18. 18 . The shoe sole according to claim 12 , wherein at least one part of the first reinforcing member and at least one part of the second reinforcing member are embedded in the sole body.
19. 19 . The shoe sole according to claim 12 , wherein a part of the first reinforcing member overlaps with a part of the second reinforcing member when viewed in an up-down direction orthogonal to both the front-rear direction and the left-right direction.
20. 20 . A shoe comprising: the shoe sole according to claim 12 ; and an upper located above the shoe sole.

Description

TECHNICAL FIELD The present invention relates to a shoe sole in which a reinforcing structure portion is provided in a sole body, and a shoe including the shoe sole. BACKGROUND ART Generally, in a shoe used for ball sports or the like, there is a demand for a shoe that is excellent in an assisting function for swiftly and smoothly performing a change in direction (a so-called cutting maneuver), while also performing a travel assisting function. For example, WO 2019/073504 (PTL 1) discloses a shoe that improves these assisting functions. In the shoe disclosed in PTL 1, a reinforcing structure portion made up of a reinforcing member, which is formed of a material higher in rigidity than a material forming a midsole, is provided in the midsole as a sole body. In more detail, the reinforcing member is made of a single member in which a plurality of mutually parallel bars is provided, and each of the plurality of bars is disposed extending in an oblique direction, on a lower surface of the midsole, such that one end thereof is located at a portion of a forefoot portion on a lateral foot side and the other end thereof is located at a portion near a rear end of a midfoot portion on a medial foot side. In this way, an interposed portion, which is formed by a part of the midsole made of a material lower in rigidity than the reinforcing member, is disposed between the plurality of bars, and this interposed portion extends along a same direction as the direction in which the plurality of bars extends. In the case where formed in such a manner, twisting easily occurs between a portion of a forefoot portion on the medial foot side and a portion of a rearfoot portion on the lateral foot side, around an axis in a direction where the interposed portion extends, at the location where the interposed portion is provided. Therefore, in association with this, an impulse of brake at the time of a cutting maneuver increases, and as a result, a swift and smooth cutting maneuver can be realized. Moreover, in the case where formed in such a manner, the plurality of bars is disposed extending in a direction crossing a left-right direction of the shoe sole. Therefore, a bending stiffness against dorsal flexion of the shoe sole around an axis in the left-right direction also increases, and as a result of this, a function for assisting a start-off at the time of a cutting maneuver (namely, an acceleration assisting function), and a function for increasing a propulsive force to the front at the time of traveling (namely, a travel assisting function), also improve. CITATION LIST Patent Literature PTL 1: WO 2019/073504 A SUMMARY OF INVENTION Technical Problem However, in the shoe disclosed in PTL 1, since the reinforcing structure portion is made up of a reinforcing member made of a single member such as stated above, a limit naturally occurs in variously adjusting the performance of the reinforcing structure portion exhibited at the time of a cutting maneuver, in accordance with a usage of the shoe (for example, in accordance with an athletic event or the like for which the shoe is used). Namely, in the case where formed in such a manner, an adjustment of the performance other than modifying the shape (such as a modification of the width or the thickness) of the reinforcing member at each portion cannot be performed, and it becomes very difficult to provide a large rigidity difference between these portions. Accordingly, it cannot be said that an optimal design corresponding to a usage of the shoe is necessarily performed easily, and there is still room for improvement in terms of this point. Therefore, an object of the present invention, which has been made to solve the above-stated problem, is to enable a shoe sole, in which a reinforcing structure portion is provided that exhibits a desired performance in accordance with a usage, and a shoe including the shoe sole, to be easily manufactured. Solution to Problem A shoe sole based on a first aspect of the present invention is a shoe sole in which a forefoot portion for supporting a toe portion and a ball portion of a foot of a wearer, a midfoot portion for supporting an arch portion of the foot of the wearer, and a rearfoot portion for supporting a heel portion of the foot of the wearer are provided to be connected along a front-rear direction that is a direction coinciding with a foot length direction of the foot of the wearer, the shoe sole including a sole body and a reinforcing structure portion. The sole body is located continuously from the forefoot portion to the rearfoot portion, and the reinforcing structure portion is assembled on the sole body. The reinforcing structure portion has a first reinforcing member formed of a material higher in rigidity than a material forming the sole body, and a second reinforcing member formed of a material higher in rigidity than the material forming the sole body, the second reinforcing member being made of a different member from the first rei