WO2010137068A1

WO2010137068A1 - Shoe sole of shoe suitable for training

Info

Publication number: WO2010137068A1
Application number: PCT/JP2009/002329
Authority: WO
Inventors: 倉科徹郎; 森川保宏; 勝眞理
Original assignee: 株式会社アシックス
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2010-12-02
Also published as: KR101598130B1; KR20140060593A; JPWO2010137068A1; JP5278714B2

Abstract

A shoe sole (1) is provided with a long band-shaped member (4) from the front to the back between inner tread members (23,33) and outer tread members (24,34). The band-shaped member (4) has projections (40). The projections (40) continuously or intermittently extend in the X direction from the front to the back. The ground contact surfaces of the projections (40) project below the ground contact surfaces of the inner tread members (23,33) and the outer tread members (24,34). Either one or both conditions of (a) and (b) below are satisfied. (a) The hardness of the mid-sole (2) of the band-shaped member (4) is greater than the hardness of the mid-sole (2) of the inner tread members (23,33) and the outer tread members (24,34). (b) The hardness of the outer sole (3) of the band-shaped member (4) is greater than the hardness of the outer sole (3) of the inner tread members (23,33) and the outer tread members (24,34).

Description

Shoe sole suitable for training

The present invention relates to a shoe sole that can be used for daily posture correction or muscle strength training.

A beautiful walking posture can be obtained by walking with the center of the load on the sole along a constant pressure center. However, modern people, especially women and elderly people, have weak muscles, so that the center of pressure tends to sway inside and outside the foot during walking.

A variety of footwear soles with prominent grounding surfaces have been proposed for training.

JP 2006-55600 A (summary) JP2005-169053A (Summary) Special table 2003-508098A (summary)

For example,

Documents

1 and 2 disclose footwear bottoms having long ridges in the front-rear direction. By wearing these footwear, it may be possible to correct for the center of gravity of the body.

However, in each of the footwear bottoms, the inner and outer centers of the footwear soles protrude greatly downward, so that the inner and outer sway of the foot tends to increase. Therefore, it is difficult to wear shoes having the respective footwear soles in daily life, and it will not be practically usable.

An object of the present invention is to provide a shoe sole for training shoes that can be worn in daily life and is useful for improving walking posture.

In order to achieve the above object, a shoe sole according to an aspect of the present invention includes an outsole having a ground contact surface that contacts the ground when landing, and a midsole that is disposed on the outsole and reduces a landing impact. In the shoe sole, an inner stepping portion that supports the inside of the foot in the stepping region including the joint between the middle foot and toe joints, an outer stepping portion that supports the outer side of the foot in the stepping region, and the inner stepping portion and the outer side A belt-like belt-like portion that is long in the front-rear direction between the stepping portion, the belt-like portion has a protrusion, and the protrusion extends continuously or intermittently in the front-rear direction. The grounding surface protrudes downward from the grounding surfaces of the inner stepping portion and the outer stepping portion, and satisfies one or both of the following conditions (a) and (b).
(A) The hardness of the midsole of the belt-shaped part is larger than the hardness of the midsole of the inner stepping part and the outer stepping part.
(B) The hardness of the outsole of the belt-like portion is larger than the hardness of the outsole of the inner stepping portion and the outer stepping portion.

According to the present invention, the following effects (i) to (iii) can be expected.
Effect (i):
When the wearer wears the shoe having the sole of the present invention and walks, the central protrusion is grounded in the stepping region, and the inner and outer stepping portions are not easily grounded. Therefore, the wearer will walk so that the center of load, that is, the center of pressure, is located on the central strip as the wearer tries to keep the balance of walking. Therefore, it is expected that the variation in the movement locus of the pressure center is reduced. In addition, by trying to walk so that the center of pressure is positioned on the belt-like portion, it is possible to maintain a stable walking posture and further increase the amount of muscle activity.
However, if the protrusion amount of the protrusion is too large, the wearer cannot use it on a daily basis or cannot walk safely.

Effect (ii):
Here, in the shoe sole of the present invention, the hardness of the midsole and / or the outsole of the belt-like portion in the stepping region is larger than that of the inner side or the outer side. Therefore, the belt-like portion is difficult to be compressed, and the belt-like portion can be kept protruding downward. Therefore, it will be possible to reduce the amount of protrusion of the belt-like portion for obtaining the effect (i). Therefore, the stability of walking is hardly disturbed and can be worn in daily life. As a result, the movement trajectory is stabilized, and an improvement in walking posture and an increase in muscle activity can be expected.

Effect (iii):
In particular, the band portion is hard, so that the wearer will easily feel the presence of the band portion on the sole or the reaction force from the band portion. Therefore, the wearer walks with awareness of the belt-like portion, and as a result, the desired beautiful walking posture can be maintained, and the effect (i) will be easily obtained.

In the present invention, the stepping region includes at least the metatarsal interphalangeal (MP) joint, and more specifically, a part of the metatarsal bone body, the metatarsal bone head, the MP joint, the proximal phalanx bone base, and Includes part of the proximal phalanx head. When these parts catch and kick the road surface during walking, the wearer is aware of the belt-like portion, so that the walking posture is stabilized and the amount of muscle activity increases.
In a preferred embodiment of the present invention, the band of the stepping region supports at least part of the second or third heel MP joint or these toes.

In the present invention, the protrusions may be formed continuously without being divided in the front-rear direction, or may be formed intermittently by being divided in the front-rear direction.
Further, “long in the front-rear direction” includes not only the case where the belt-like portion extends forward along the long axis of the foot but also the case where the belt-like portion extends obliquely forward along the outer edge or inner edge of the stepping portion. Means.
“Strip shape” means that the length of the strip portion in the front-rear direction is larger than the width of the strip portion in the foot width direction.
In the present invention, “high hardness” means that the midsole and the outsole are difficult to compress, that is, the Young's modulus is large.

In the present invention, the size (width) of the belt-like portion and the protrusion in the foot width direction is preferably about 2 mm to 50 mm, more preferably about 3 mm to 40 mm, and most preferably about 5 mm to 30 mm.
If the width of the band or protrusion is small, the wearer will hardly feel the protrusion on the sole. On the other hand, if the width is large, the movement trajectory tends to be unstable.
In addition, both width | variety may differ from each other, for example, the width | variety of a strip | belt-shaped part is larger than the width | variety of a protrusion.

In the present invention, the protrusion amount of the protrusion with respect to the inner and outer stepped portions is preferably about 0.1 to 5.0 mm, more preferably about 0.3 to 4.5 mm, and about 0.5 to 4.0 mm. Most preferred.
If the amount of protrusion is small, it is difficult for the wearer to feel the protrusion on the sole. On the other hand, if the protruding amount is large, walking tends to become unstable.

The midsole is mainly formed of a resin foam, but in addition to the foam, a soft resin having rubber elasticity may be disposed on the inner and outer stepped portions.

For practical purposes, the hardness of the resin foam of the midsole is preferably about 30 to 90 degrees according to JIS K 7312 (hereinafter referred to as “C hardness”).
The hardness difference between the belt-like portion of the midsole and the foam other than the belt-like portion is preferably about 5 to 40 degrees in terms of C hardness, and most preferably about 10 to 35 degrees. If the difference in hardness is small, the wearer will hardly feel the band-like part on the sole, and if the difference in hardness is large, the wearer will easily deviate from the practical hardness range.

From this point of view, the hardness of the foam of the band-shaped part is more preferably about 60 to 85 degrees in terms of C hardness, and most preferably about 65 to 85 degrees.
On the other hand, the hardness of the midsole foam other than the belt-like part is more preferably about 38 to 63 degrees, and most preferably about 43 to 63 degrees in terms of C hardness.

The outsole is preferably formed of a rubber foam or non-foam, and its hardness is preferably about 50 to 95 degrees C in terms of practicality.
The hardness difference between the belt-like portion including the protrusion of the outsole and the portions on both sides thereof (inner and outer stepped portions and inner and outer stepped portions) is preferably about 5 to 30 degrees in terms of C hardness. A degree of about 20 to 20 degrees is most preferable. If the hardness difference is small, it is difficult for the wearer to feel the belt-like part on the sole. On the other hand, if the hardness difference is large, it is likely to be out of the practical hardness range.

From this point of view, the hardness of the protrusions and strips of the outsole is preferably about 70 to 92 degrees C, and most preferably about 75 to 90 degrees in terms of C hardness.
On the other hand, the C hardness on the both sides of the belt-like portion of the outsole is preferably about 55 to 80 degrees, and most preferably about 60 to 75 degrees.

FIG. 1 is a schematic perspective view showing a shoe sole according to an embodiment of the present invention as viewed obliquely from the rear. FIG. 2 is a schematic perspective view showing the shoe sole as viewed from an oblique side. 3A is a schematic longitudinal sectional view of a shoe sole taken along line IIIA-IIIA in FIG. 3B, and FIG. 3B is a schematic transverse sectional view of a midsole. FIG. 4 is a schematic bottom view showing the relationship between the shoe sole and the foot skeleton. FIG. 5 is a schematic bottom view showing a shoe sole. 6A is a sectional view taken along the line VIA-VIA in FIG. 5, FIG. 6B is a sectional view taken along the line VIB-VIB in FIG. 5, FIG. 6C is a sectional view taken along the line VIC-VIC in FIG. FIG. 6E is a sectional view taken along the line VIE-VIE in FIG. 7A to 7D are schematic cross-sectional views showing other embodiments, respectively. FIG. 8A is a schematic bottom view showing a modification of the belt-like portion of the midsole, and FIGS. 8B and 8C are schematic longitudinal sectional views showing a modification of the upper part of the belt of the midsole.

In the present invention, it is preferable that both the conditions (a) and (b) are satisfied.
In this case, for both the midsole and the outsole, the shoe sole has a band-shaped portion having hardness greater than that of the inner stepping portion and the outer stepping portion. Therefore, the effects (i) to (iii) will be remarkably exhibited.

In the present invention, it is preferable that the midsole is thicker than the outsole and satisfies at least the condition (a).
In general, the midsole is more flexible and thicker than the outsole. In the case of such a midsole, the effects (i) to (iii) are likely to be exhibited when the band portion has a high hardness.

In the present invention, it is preferable that the belt-like portion of the outsole and the inner and outer stepped portions of the outsole are separated and satisfy at least the condition (b).
Separating the midsole into each region is time consuming and leads to increased costs. Therefore, providing a hardness difference for each region of the midsole causes an increase in cost. On the other hand, the outsole can be separated between the inside and the outside and the center. Therefore, in this embodiment, even if a hardness difference is provided for each region of the outsole, the cost will not increase so much.
A stiff outsole will help reduce wear on the grounding surface of the protrusion.

In the present invention, it is preferable that the outsole of the belt-shaped portion is formed of a rubber non-foamed material, and the outsole of the inner and outer stepped portions is formed of a rubber foamed material.
According to this aspect, the non-foamed rubber can easily obtain a greater hardness than the foamed material.

In the present invention, it further comprises a front end portion in front of the stepping portion and a step region including a Lisfranc joint behind the step portion, wherein the step region is a foot in the step region. An inner stepping portion that covers the inside of the foot, an outer stepping portion that covers the outside of the foot in the stepping region, and a belt-like portion of the stepping portion between the inner stepping portion and the outer stepping portion. A belt-like stepped portion that is continuous or intermittently long in the front-rear direction, the outsole is grounded at a grounding surface of the belt-like stepped portion, and the grounding surface of the belt-like stepped portion is the inner side and It is preferable that the outer sole protrudes downward from the ground contact surface, and the hardness of the outsole of the belt-like stepping portion is larger than the hardness of the outsole of the inner and outer stepping portions.
According to such an embodiment, the hard belt-like stepping portion that contacts the ground even in the stepping region will further enhance the effects (i) to (iii).

In the present invention, it is preferable that the hardness of the inner and outer stepped portions of the outsole is greater than the hardness of the inner and outer stepped portions of the outsole.
According to such an embodiment, the stiff inner and outer stepped portions will help prevent the foot arch from degrading.
A belt-like portion having a high hardness reduces the flexibility of the stepping portion. However, the outsole of the inner and outer stepped portions with low hardness will supplement the flexibility.

In this embodiment, the stepless region does not mean that the outsole does not touch the ground, but means the Lisfranc joint and its vicinity, and the area where the arch of the foot is formed, and generally the Chopard joint and its vicinity. Including sites.

In the present invention, it further comprises a front end portion in front of the stepping portion and a step region including a Lisfranc joint behind the step portion, wherein the step region is a foot in the step region. An inner stepping portion that covers the inside of the foot, an outer stepping portion that covers the outside of the foot in the stepping region, and a belt-like portion of the stepping portion between the inner stepping portion and the outer stepping portion. It is preferable that a belt-like stepped portion that is long before and after continuous or intermittent connection is provided, and the hardness of the midsole is greater than the hardness of the midsole of the inner and outer stepped portions at the belt-like stepped portion.
According to such an embodiment, a hard belt-like stepped portion that contacts the ground in the stepped region will further enhance the effects (i) to (iii).

In the present invention, a longitudinal groove extending along the belt-like portion may be formed on both the midsole and the outsole between the belt-like portion and the inner and outer stepping portions.

In the present invention, it is preferable that the belt-like stepped portion extends along the front-rear direction of the foot, and the belt-like portion of the stepping region is inclined obliquely inward and forward from the rear to the front.
According to such an aspect, in general, the load gravity center during walking extends from the rear foot portion in the foot length direction in the region where it is not stepped on, and is tilted slightly inward in the stepping region. In the case of the present embodiment, the belt-like portion of the stepping area extends obliquely inward and forward as it goes from the rear to the front, and therefore, walking that is conscious of the load center of gravity will be facilitated.
That is, the movement of the foot from the foot flat when kicking out is a movement that twists more inward than usual. This increased foot movement will help increase knee and hip movements and will promote muscle activity more than usual.

According to another aspect of the present invention, there is provided a shoe sole including an outsole having a ground contact surface that is grounded upon landing, and a midsole disposed on the outsole and configured to mitigate impact of landing. Between the inner stepping portion that supports the inside of the foot in the stepping region including the internode joint, the outer stepping portion that supports the outer side of the foot in the stepping region, and between the inner stepping portion and the outer stepping portion. A belt-like belt-like portion that is long in the front-rear direction, the belt-like portion has a protrusion, the protrusion extends continuously or intermittently in the front-rear direction, and the grounding surface of the protrusion is the inner stepping Projecting below the grounding surface of the outer stepping portion and the outer stepping portion, and between the belt-like portion and the inner stepping portion and the outer stepping portion, respectively, on both the midsole and the outsole. A vertical groove extending along the belt-like portion is formed.

Also in this case, the effects (i) to (iii) will be obtained such that the wearer can maintain the desired beautiful walking posture.
That is, when the ground contact surface of the belt-shaped portion is grounded, the outsole and midsole of the belt-shaped portion are compressed and deformed. At this time, the midsole of the inner and outer stepped portions will also exhibit compressive deformation at the same time as the belt-shaped portion is compressed and deformed. If the longitudinal groove is not provided, the deformation of the belt-shaped portion will be reduced due to the deformation of the inner and outer stepping portions, that is, due to the continuity of the deformation. On the other hand, the provision of the longitudinal grooves reduces the continuity of the deformation, so that a large compressive deformation will be obtained in the strip.
This large compressive deformation will reduce the protrusion of the protruding band and will increase walking stability.
In addition, the wearer will easily feel the reaction force of the compressed mid-sole of the belt-like part on the sole. Therefore, the wearer walks while being aware of the belt-like portion. As a result, the effects (i) to (iii) are likely to be obtained, for example, the wearer can maintain the desired beautiful walking posture.

In the present invention, a step region including a Lisfranc joint is further provided behind the step portion, wherein the step region includes an inner step portion that covers the inside of the foot in the step region, and the step portion. An outer stepped portion that covers the outside of the foot in the region, and a belt-like strip shape that is long before and after continuously or intermittently connecting to the striped portion of the stepping region between the inner stepped portion and the outer stepped portion. It is preferable that a step portion is provided, and the longitudinal groove extends along the belt-like step portion between the belt-like step portion and the inner and outer step portions.

In the present invention, it is preferable that the belt-like step portion extends along the front-rear direction of the foot, and the belt-like portion of the stepping region is inclined obliquely inward and forward as it goes from the rear to the front.

The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the examples and figures are for illustration and description only and should not be used to define the scope of the present invention. The scope of the present invention is defined only by the claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same or corresponding parts.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the shoe sole 1 for the left foot is illustrated and described.
As shown in FIGS. 1 and 2, the shoe sole 1 includes an outsole 3 and a midsole 2.
In FIG. 1 and FIG. 2, fine grooves (so-called design) formed on the ground contact surface of the outsole 3 are omitted.

The outsole 3 has a ground contact surface in contact with the road surface.
As shown in FIG. 3A, the midsole 2 is disposed on the outsole 3 and reduces the impact of landing. Therefore, the midsole 2 is formed thicker than the outsole 3.

1, 2 and 4, an outsole 3 separated into a plurality of parts indicated by halftone dots is provided on the bottom surface of the midsole 2. The outsole 3 and the midsole 2 are provided with a belt-like portion 4 in FIG. 1 and a belt-like portion 2b in FIG. 3B, respectively.

Forefoot 12;
Forefoot 4 12 is formed at a position corresponding to the foot than the bones of the first metatarsal B4 ₁ ~ fifth metatarsal B4 _5.

Stepping area 12a;
In FIG. 4, the forefoot part 12 includes a stepping area 12a. The stepping area 12a includes the metatarsal interphalangeal joint MP, and more specifically, the first metatarsal B4 ₁ to the fourth metatarsal B4 ₄ of the first to fourth toes and the first to fourth toes. 4th base phalange B3 ₁ to 4th base phalanx B3 ₄ are included.

In the stepping region 12a shown in FIG. 5, the

inner stepping portions

23 and 33, the

outer stepping portions

24 and 34, and the belt-

like portions

2b and 4 of the midsole 2 and the outsole 3 are provided.
In FIG. 4,

inner stepping portions

23 and 33 are portions that support the inner side (IN) of the foot in the stepping region 12a. For example, the inner踏付

parts

23 and 33 will support the MP joints and the first base section a portion of a bone B3 ₁ of the first toe f1.
The

outer stepping portions

24 and 34 are portions that support the outer side (OUT) of the foot in the stepping region 12a. For example, the outer踏付

unit

24, 34 supports a fourth base phalanx B3 _4, B3 ₅ of the fourth toe f4 and the fifth toe f5.

Hind legs 10;
As shown in FIGS. 3B and 4, the rear end portion 30 of the outsole 3 and the rear foot portion 10 of the midsole 2 are provided at positions substantially corresponding to the ribs B <b> 9.

Do not step on area 11a;
The middle foot portion 11 shown in FIG. 4 includes a region 11a without stepping on.
The step 11a includes the Chopard joint J _C and the Lisfranc joint J _L.
Chopard joint J _C includes a talus B8, a joint between the cuboid B7 and Funejo bone B6. The Lisfranc joint J _L is a joint between the inner wedge bone B5 ₁ , the intermediate wedge bone B5 ₂ , the outer wedge bone B5 ₃ and the cubic bone B7, and the first metatarsal bone B4 ₁ to the fifth metatarsal bone B4 _5. is there.

In the step region 11a shown in FIGS. 3B and 5, the midsole 2 and the outsole 3 are formed with

inner step portions

21, 31,

outer step portions

22, 32, and belt-like step portions 2b1, 41, respectively. ing.
The

inner step portions

21 and 31 are portions that cover the inner side (IN) of the foot in the region 11a. For example, the

inner step portions

21 and 31 cover the Lisfranc joint J _L of the first heel f1 to the second heel f2.
The

outer step portions

22 and 32 are portions that cover the outer side (OUT) of the foot in the region 11a. For example, the

outer stepless portions

22 and 32 cover the Lisfranc joint J _L of the fourth heel f4 to the fifth heel f5.

The belt-like step portions 2b1 and 41 constitute parts of the belt-

like portions

2b and 41, respectively. The belt-like step portions 2b1 and 41 are belt-like portions that are long in the front-rear direction between the inner step portion 31 (21) and the outer step portion 32 (22). The belt-like stepped portion 41 is provided from the vicinity of the Chopard joint J _C toward the front X1.
Accordingly, the

inner step portions

31 and 21 and the

outer step portions

32 and 22 are formed on both sides in the width direction W of the belt step portions 41 and 2b1 constituting a part of the belt portion 4.

That is, the

strips

2b and 4 are provided between the

inner stepping portions

23 and 33 and the

outer stepping portions

24 and 34, and between the

inner stepping portions

21 and 31 and the

outer stepping portions

22 and 32. The belt-like portion 2b of the midsole 2 in FIG. 3 is continuously connected.

3B and 4, the midsole 2 is formed of a resin foam such as EVA.

The hardness of the belt-like portion 2b in the midsole 2 is set to be larger than the hardness of the portion 2a other than the belt-like portion 2b. The strip-like portion 2b and the portion 2a are illustrated with the hatching directions changed from each other.
For example, the hardness of the foam of the portion 2a of the midsole 2 is set to about 53 degrees in terms of C hardness, while the hardness of the band-shaped portion 2b is set to 75 degrees in terms of C hardness. The width of the belt-like portion 2b, that is, the size in the foot width direction is set to about 10 to 15 mm, for example.

Outsole 3:
As shown by the halftone dots in FIG. 5, the outsole 3 is composed of a plurality of parts separated from each other, and is arranged in an island shape on the bottom surface of the rear foot part 10, the middle foot part 11 and the front foot part 12 of the midsole 2. Has been.
The outsole 3 includes a rear end portion 30 and a belt-like portion 4 made of a rubber non-foam, an inner step portion 31, an outer step portion 32, an inner step portion 33, and an outer step portion made of rubber foam. 34 and a front end portion 35.

The belt-like portion 4 is intermittently provided between the rear end portion 30 and the front end portion 35 in the front-rear direction X, for example, separated into three belt-like parts. On both sides of the belt-like portion 4, inner and outer stepped

portions

31, 32 made of a plurality of parts and inner and outer stepped

portions

33, 34 made of a plurality of parts are arranged.

The hardness of each part of the outsole 3 is set to the following values, for example.
In addition, each part of the outsole 3 is shown by the size and density of halftone dots different from each other according to the difference in hardness described below.

The hardness of the rear end portion 30 shown in FIG. 5 is, for example, about 70 degrees in terms of hardness defined in JIS K 6253 (hereinafter referred to as “A hardness”), and about 86 in terms of the hardness value converted to C hardness. Is set to degrees.
The hardness of the inner stepping portion 31 and the outer stepping portion 32 is set to, for example, 70 degrees in C hardness.
The hardness of the inner stepping portion 33 and the outer stepping portion 34 is set to 67 degrees in C hardness, for example.
The hardness of the front end portion 35 is set to 70 degrees in C hardness, for example.

For example, the hardness of the belt-like portion 4 is set to about 63 degrees in terms of A hardness and about 82 degrees in terms of the hardness value converted to C hardness.
Therefore, the hardness of the belt-like portion 4 is set to a value larger than the hardness of the inner step portion 31, the outer step portion 32, the inner step portion 33, and the outer step portion 34 on both sides.

Strip 4;
As shown in FIG. 3A, the belt-like portion 4 of the outsole 3 is provided at a position substantially corresponding to the belt-like portion 2b of the midsole 2, and is provided so as to cover the belt-like portion 2b of the midsole 2. Yes. The belt-like portion 4 of the outsole 3 is extended to the rear of the belt-like portion 2 b of the midsole 2.
As shown in FIG. 5, a plurality of strip portions 4 of the outsole 3 are provided intermittently in a strip shape that is long in the longitudinal direction X of the foot. The width of the belt-like portion 4 is set to be substantially the same as that of the belt-like portion 2b.

Between the inner stepping portion 31 and the outer stepping portion 32, the band-like stepping portion 41 constituting a part of the band-like portion 4 of the outsole 3 is formed intermittently.

Strip portion 4 (2b) in踏付regions 12a and depressed without region 11a of Figure 4 is inclined towards the rear (Lisfranc joint J _L) in the forward direction X1 of the oblique inner IN as it goes forward. On the other hand, in the rear foot portion 10, the belt-like portion 4 of the outsole is disposed along the long axis direction (front-rear direction X) of the foot. That is, as shown in FIG. 4, in the region 11a and踏付region 12a not stepped on

belt portion

2b, 4, corresponding from Lisfranc joint J _L of the third toe f3 in metatarsophalangeal joint MP of the second toe f2 through the position toward the first base phalanx B3 ₁ condyle of the first toe f1 is inclined obliquely.

Projection 40;
As shown in FIG. 2, each part of the belt-like portion 4 of the outsole has a plurality of protrusions 40. Each protrusion 40 has a strip shape that is long in the front-rear direction X, and each protrusion 40 is intermittently disposed along the direction in which the strip portion 4 extends.
As shown in FIGS. 6B to 6E, the grounding surface of the protrusion 40 is formed by the inner stepping portion 31, the outer stepping portion 32, the inner stepping portion 33, and the outer stepping portion 34 constituting the grounding surfaces on both sides thereof. It protrudes downward from the ground contact surface by about 0.5 mm to 1.5 mm, for example.

As described above, the plurality of protrusions 40 are arranged in a band shape, and therefore, the protrusions 40 are more easily grounded than the portions 31 to 34 on both sides. Therefore, the wearer will be able to feel the part corresponding to the belt-like portion 4 on the sole before he / she leaves the landing.

Note that “the protruding portion 40 protrudes downward Z1” means that when the back surface of the shoe sole faces a flat road surface, the belt 4 is grounded and the portions on both sides of the belt 4 are not grounded. It means that it can be in a state.
Further, the protrusion 40 is provided with a fine groove, and the groove portion does not have to protrude with respect to the ground contact surfaces on both sides.

Vertical grooves

2d, 3d:
As shown in FIGS. 1, 5, and 6B to 6E,

vertical grooves

2d and 3d are provided between the belt-

like portions

2b and 4 and the shoe sole portions on both sides thereof. The longitudinal groove 2d of the midsole 2 is formed as a groove that is recessed upward from the lower surface of the midsole 2, while the longitudinal groove 3d of the outsole 3 is a belt-like portion 4 of the outsole 3 and portions 31 on both sides thereof. , 32 are separated.
That is, as shown in FIG. 5, the

longitudinal grooves

2d and 3d are formed in the belt-like portion 4 and the

inner step portions

21 and 31, the

outer step portions

22 and 32 on the both sides, the

inner step portions

23 and 33, and the outer step portions. It is formed so that the continuity with the stepping

portions

24 and 34 and the front end portion 35 is lowered.

As clearly shown in FIG. 1, the midsole 2 and the outsole 3 are formed with a large number of

lateral grooves

2g, 3g. These

lateral grooves

2g and 3g facilitate the bending of the shoe sole.
The

lateral grooves

2g and 3g of the midsole 2 and the outsole 3 separate the band-shaped protrusion 40 in the front-rear direction.

7A to 7D and FIGS. 8A to 8C show modifications.

As shown in FIG. 7A, the belt-like portion 2b of the midsole 2 may be formed so as to spread upward.

7B, the belt-like portion 2b of the midsole 2 may be formed so as to protrude into the outsole 3.

As shown in FIG. 7C, in the outsole 3, the belt-like portion 4, the inner step portion 31 (inner step portion 33) and the outer step portion 32 (outer step portion 34) on both sides of the belt portion 4. It may be formed integrally.

As shown in FIG. 7D, in the outsole 3, the band-shaped portion 4 and the inner stepped portion 31 (inner stepped portion 33) and the outer stepped portion 32 (outer stepped portion 34) on both sides of the banded portion 4. A vertical groove 3d may be formed therebetween.

As shown in FIGS. 8A and 8B, each protrusion 40 of the belt-like portion 4 may have a width W in the foot width direction larger than a length L in the front-rear direction X.
As shown in FIG. 8C, the belt-like portion 4 of the outsole 3 may be formed continuously, and only the protrusions 40 may be provided intermittently.

In the above-described embodiment, the belt-like portion 2b of the midsole 2 is formed continuously and integrally. However, the belt-like portion 2b may be provided intermittently with respect to the midsole 2 as well.

Further, in the above-described embodiment, the belt-like portion 2b and the belt-like portion 4 extend toward the front X1 on the diagonally inner side in the stepping region 12a, but the belt-like portion 2b and the belt-like portion 4 are arranged in the stepping region 12a. May extend toward the front of the diagonally outer side, or may extend along the front-rear direction X.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily consider various changes and modifications within the obvious scope by looking at the present specification.

For example, the midsole may be provided with a recess in the resin foam and filled with a cushioning element other than the resin foam. As such a buffer element, a rubber-like soft elastomer or a sheath-like member (pod) is known.

Further, all the parts of the outsole may be formed of a rubber non-foam, or conversely, may be formed of a rubber foam.

In addition, the bottom of the shoe sole may not be grounded in part or all of the region without stepping on. In this case, no protrusion is provided for the portion of the area that does not touch the ground.

In addition, it is also possible to employ | adopt the technical idea about the midsole of this invention about an insole.
In addition, even if the ground contact surface of the belt-like portion of the outsole is not projected, a certain degree of effect will be obtained.

The present invention can be applied to training shoes for correcting walking posture and strengthening muscle strength.

1: shoe sole 2: mid sole 2b1: belt-

like step portion

2d, 3d: longitudinal groove 3:

outsole

4, 2b: belt-like portion 11a: step region 12a: step region 21, 31: inner step portion 22, 32: Outer step part 23, 33: Inner step part 24, 34: Outer step part 40: Projection IN: Inner side J _L : Lisfranc joint MP: Middle foot joint joint X: Front-back direction

Claims

In a sole comprising an outsole having a ground contact surface to be grounded at the time of landing, and a midsole arranged on the outsole to mitigate the impact of landing,
An inner stepping part that supports the inside of the foot in the stepping region including the joint between the midfoot and heel joints;
An outer stepping portion that supports the outside of the foot in the stepping region;
A strip-shaped portion that is long in the front-rear direction between the inner stepping portion and the outer stepping portion,
The strip has a protrusion,
The protrusion extends continuously or intermittently in the front-rear direction,
The grounding surface of the protrusion protrudes downward from the grounding surfaces of the inner stepping portion and the outer stepping portion,
And a sole that satisfies one or both of the following conditions (a) and (b): (a) the midsole of the belt-like portion has a midsole hardness and a midpoint of the outer stepping portion; (B) The hardness of the outsole of the belt-shaped portion is larger than the hardness of the outsole of the inner stepping portion and the outer stepping portion.
A shoe sole that satisfies both the conditions (a) and (b) of claim 1.
The shoe sole according to claim 1, wherein the midsole is thicker than an outsole, and satisfies at least the condition (a) of claim 1.
The shoe sole according to claim 1, wherein the belt-like portion of the outsole and the inner and outer stepped portions of the outsole are separated from each other and satisfy at least the condition (b) of claim 1.
5. The shoe sole according to claim 4, wherein the outsole of the belt-shaped part is formed of a rubber non-foam, and the outsole of the inner and outer stepping parts is formed of a rubber foam.
In claim 4,
A front end in front of the stepping area;
A step region including a Lisfranc joint behind the stepping region, wherein the step region includes:
An inner step that covers the inside of the foot in the step region;
An outer step portion that covers the outside of the foot in the step step region;
Between the inner stepping portion and the outer stepping portion, a strip-shaped stepping portion that is long in the front-rear direction continuously or intermittently connected to the strip-shaped portion of the stepping portion,
The outsole is grounded at the ground contact surface of the belt-like step,
The ground contact surface of the belt-like stepping portion protrudes below the ground contact surfaces of the inner and outer stepping portions,
A shoe sole in which the hardness of the outsole of the belt-like stepping portion is larger than the hardness of the outsole of the inner and outer stepping portions.
In claim 6,
A shoe sole in which the hardness of the inner and outer tread portions of the outsole is greater than the hardness of the inner and outer tread portions of the outsole.
In claim 3,
A front end in front of the stepping area;
A step region including a Lisfranc joint behind the stepping region, wherein the step region includes:
An inner step that covers the inside of the foot in the step region;
An outer step portion that covers the outside of the foot in the step step region;
Between the inner stepping portion and the outer stepping portion, a strip-shaped stepping portion that is long in the front-rear direction continuously or intermittently connected to the strip-shaped portion of the stepping portion,
A shoe sole in which the hardness of the midsole is larger than the hardness of the midsole of the inner and outer stepping portions in the belt-like stepping portion.
The shoe sole according to claim 1, wherein a longitudinal groove extending along the belt-like portion is formed in both the midsole and the outsole between the belt-like portion and the inner and outer stepping portions. .
In claim 6,
The belt-like stepped portion extends along the front-rear direction of the foot,
The shoe sole in which the belt-like portion of the stepping area is inclined obliquely inward and forward as it goes from the rear to the front.
In a sole comprising an outsole having a ground contact surface to be grounded at the time of landing, and a midsole arranged on the outsole to mitigate the impact of landing,
An inner stepping part that supports the inside of the foot in the stepping region including the joint between the midfoot and heel joints;
An outer stepping portion that supports the outside of the foot in the stepping region;
A strip-shaped portion that is long in the front-rear direction between the inner stepping portion and the outer stepping portion,
The strip has a protrusion,
The protrusion extends continuously or intermittently in the front-rear direction,
The grounding surface of the protrusion protrudes below the grounding surfaces of the inner stepping portion and the outer stepping portion, and
A shoe sole in which a longitudinal groove extending along the belt-like portion is formed on both the midsole and the outsole between the belt-like portion and the inner and outer stepping portions.
In claim 11,
Further comprising a step region including a Lisfranc joint behind the stepped portion, wherein the step region is
An inner step that covers the inside of the foot in the step region;
An outer step portion that covers the outside of the foot in the step step region;
Between the inner step portion and the outer step portion, a belt-like step portion that is long in the front-rear direction continuously or intermittently connected to the belt portion of the stepping region,
A shoe sole in which the longitudinal groove extends along the belt-like step portion between the belt-like step portion and the inner and outer step portions.
In claim 12,
The belt-like stepped portion extends along the front-rear direction of the foot,
The shoe sole in which the belt-like portion of the stepping area is inclined obliquely inward and forward as it goes from the rear to the front.