WO2021117190A1

WO2021117190A1 - Shoe sole and shoe comprising same

Info

Publication number: WO2021117190A1
Application number: PCT/JP2019/048704
Authority: WO
Inventors: 政剛仲谷; 純一郎立石; 雄佑西浦
Original assignee: 株式会社アシックス
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2021-06-17
Also published as: EP4056067A4; EP4056067A1; CN114786521A; JPWO2021117190A1; US20230024019A1

Abstract

A shoe sole (20A) includes an outsole and a sole body (22). The sole body (22) includes a low hardness section (24) made from foam material having a relatively low hardness, and a high hardness section (25) made from foam material having a relatively high hardness. The low hardness section (24) is provided so as to define the entire region of the lower surface of the sole body (22). The high hardness section (25) is disposed only in a specific region of the region positioned above the low hardness section (24) of the sole body (22).

Description

Sole and shoes with it

The present invention relates to a sole and a shoe provided with the sole.

When running or walking, a phenomenon called pronation occurs in which the heel of the foot falls inward. This pronation is the original function of the foot to alleviate the impact applied to the foot at the time of landing by causing the heel to fall inward moderately at the time of landing (strictly immediately after that).

However, there are individual differences in the degree of collapse of the heel part, and people who are prone to the phenomenon that the heel part collapses inward more than necessary, called overpronation, and the heel part called underpronation are sufficient. Some people are more likely to have the phenomenon of not falling inward. These overpronations and underpronations cause driving disorders and gait disorders.

In addition, people with so-called valgus flat feet tend to put a burden on the inner foot side of the foot when landing, and so-called O-legged people tend to put a burden on the outer foot side of the foot when landing. It tends to be easy. Therefore, in these people, there is a possibility that the hallux and small toes may be deformed as they get older, and as a result, it may cause a running disorder or a gait disorder.

Therefore, conventionally, a high-rigidity part or a high-hardness part is provided at a predetermined position on the sole of the shoe to improve the stability of the foot at the time of landing and adjust the degree of collapse of the heel part, or the part on the inner foot side of the foot. Sole soles have been developed to prevent the load from being excessively concentrated on the outer foot side.

For example, in Japanese Patent Application Laid-Open No. 2000-225002 (Patent Document 1), for example, a resin plate is extended along the front-rear direction of the sole as a high-rigidity portion having higher bending rigidity than other portions. By doing so, the sole is disclosed in which the torsional rigidity of the sole around the long axis is increased, thereby improving the stability at the time of landing.

Further, in Japanese Patent Application Laid-Open No. 2016-59555 (Patent Document 2), the outer foot side portion of the midsole made of foam material reaches the upper surface from the lower surface so as to be a shoe suitable for a person with O-legs. As described above, a sole is disclosed in which a high-rigidity portion having a high compressive rigidity as compared with other portions is provided, thereby improving stability at the time of landing.

In addition to this, it is known that a sole has improved stability at the time of landing by providing a high-rigidity portion or a high-hardness portion at a predetermined position in the lower layer portion of the midsole made of foam material.

Japanese Unexamined Patent Publication No. 2000-22002 Japanese Unexamined Patent Publication No. 2016-59555

However, since the sole disclosed in Japanese Patent Application Laid-Open No. 2000-225002 has a structure in which a resin plate made of a non-foam material is provided in a relatively large range of the sole, it may be too hard and the foot feel may be poor. , There is a problem that the weight of shoes becomes considerably heavy.

Further, the sole disclosed in Japanese Patent Application Laid-Open No. 2016-59555 has a configuration in which a high-rigidity portion having high compressive rigidity is provided on the outer foot side portion of the sole so as to reach the upper surface from the lower surface of the midsole made of foam material. Therefore, the thickness of the high-rigidity portion becomes considerably thick, and as a result, the foot contact may be deteriorated.

Therefore, an object of the present invention is to provide a sole that is excellent in stability at the time of landing, has good foot contact, and is lightweight, and a shoe equipped with the sole.

The sole based on the present invention includes a forefoot portion that supports the toe and tread of the foot, a midfoot that supports the tread, and a hindfoot that supports the heel of the foot. It is provided in a row in the front-rear direction, and includes an outsole provided with a ground contact surface and a sole body located above the outsole. The sole body includes a low-hardness portion made of a relatively low-hardness foam material and a high-hardness portion made of a relatively high-hardness foam material. The low hardness portion is provided so as to define the entire lower surface of the sole body, and the high hardness portion is only in a specific region of the region located above the low hardness portion of the sole body. Have been placed.

The shoe based on the present invention includes the sole based on the above invention and an upper located above the sole.

According to the present invention, it is possible to provide a sole that is excellent in stability at the time of landing, has good foot contact, and is lightweight, and a shoe equipped with the sole.

It is a perspective view of the shoe which concerns on Embodiment 1. FIG. It is an exploded perspective view of the shoe shown in FIG. It is a side view which looked at the sole (excluding the insole) shown in FIG. 1 from the outer foot side. It is a bottom view of the sole shown in FIG. It is a top view of the sole (excluding the insole) shown in FIG. It is sectional drawing along the VI-VI line shown in FIG. It is a top view of the sole (excluding the insole) of the shoe which concerns on the 1st and 2nd modification. It is a top view of the sole (excluding the insole) of the shoe which concerns on the 3rd and 4th modification. It is sectional drawing of the sole (excluding the insole) of the shoe which concerns on 5th modification. It is sectional drawing of the sole (excluding the insole) of the shoe which concerns on the 6th modification. It is sectional drawing (excluding the insole) of the sole of the shoe which concerns on 7th modification. It is sectional drawing of the sole of the shoe which concerns on 8th modification. It is sectional drawing of the sole of the shoe which concerns on 9th modification. It is a top view of the sole (excluding the insole) of the shoe according to the second embodiment. It is sectional drawing along the XV-XV line shown in FIG. It is a top view of the sole (excluding the insole) of the shoe which concerns on the tenth and eleventh modification. It is a top view of the sole (excluding the insole) of the shoe which concerns on the 12th and 13th modification. It is a top view (excluding the insole) of the sole of the shoe according to the third embodiment. It is sectional drawing along the XIX-XIX line shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments shown below, the same or common parts are designated by the same reference numerals in the drawings, and the description thereof will not be repeated.

In the embodiment shown below, the extending direction of the straight line connecting both ends in the long axis direction of the sole in the plan view of the shoe is referred to as the front-back direction, and is orthogonal to the front-back direction in the plan view of the shoe. The direction of movement is called the foot width direction.

Further, in the front-back direction, the direction from the end on the side where the portion supporting the heel of the sole of the foot is located to the end on the side where the portion of the sole supporting the toe of the foot is located is forward. In the above-mentioned anteroposterior direction, the direction from the end on the side where the part supporting the toe part of the sole of the foot is located faces the end on the side where the part supporting the heel part of the foot of the sole is located. Called backward.

Further, with reference to the front end of the sole, a position corresponding to 40% of the dimension in the front-rear direction of the sole from the front end is set as the first boundary position, and the front-rear direction of the sole from the front end. When the position corresponding to the dimension of 80% of the dimension of is set as the second boundary position, the part included between the front end and the first boundary position along the front-rear direction is referred to as the forefoot part of the sole. The part included between the first boundary position and the second boundary position along the front-back direction is called the midfoot part of the sole, and between the second boundary position and the rear end of the sole along the front-back direction. The part included in is called the hind foot part of the sole.

Here, the forefoot portion of the sole corresponds to the portion that supports the toe portion and the tread portion of the foot, and the midfoot portion of the sole corresponds to the portion that supports the tread portion of the foot. The hind foot of the sole corresponds to the part that supports the heel of the foot.

In addition, the median side of the foot in the anatomical median position (that is, the side near the median) is referred to as the inner foot side, and the side of the foot opposite to the median side in the anatomical median position (that is, the side far from the median). ) Is referred to as the outer leg side.

Furthermore, the thickness direction means the direction orthogonal to the ground contact surface of the sole unless otherwise specified, and the thickness means the dimension in the thickness direction unless otherwise specified. To do.

(Embodiment 1)
FIG. 1 is a perspective view of the shoe according to the first embodiment, and FIG. 2 is an exploded perspective view of the shoe shown in FIG. First, the configuration of the shoe 1A according to the present embodiment will be described with reference to FIGS. 1 and 2.

As shown in FIGS. 1 and 2, the shoe 1A includes an upper 10, a sole 20A, and an insole 30. The upper 10 has a shape that covers the entire instep side portion of the inserted foot. The sole 20A is located below the upper 10 so as to cover the sole of the foot. The insole 30 is housed inside the upper 10 so as to cover the inner bottom surface of the upper 10.

The upper 10 includes an upper body 11, a tongue 12, a toe side reinforcing portion 13, a heel side reinforcing portion 14, an eyelet reinforcing portion 15, and a shoelace 16. Of these, the toe 12, the toe-side reinforcing portion 13, the heel-side reinforcing portion 14, the eyelet reinforcing portion 15, and the shoelace 16 are all fixed or attached to the upper main body 11.

A lower opening covered by the sole 20A is provided in the lower part of the upper body 11, and an upper opening for exposing the upper part of the ankle and a part of the instep is provided in the upper part of the upper body 11. It is provided. The tongue 12 is fixed to the upper body 11 by sewing, welding, adhesion, or a combination thereof so as to cover the portion of the upper opening provided in the upper body 11 that exposes a part of the instep. .. For the upper body 11 and the tongue 12, for example, woven fabric, knitted fabric, synthetic leather, resin, etc. are used, and especially for shoes that require breathability and light weight, double Russell warp knitted fabric woven with polyester yarn is used. Ru.

The toe-side reinforcing portion 13 and the heel-side reinforcing portion 14 are provided to reinforce the portion of the upper body 11 that covers the toe tip and the portion that covers the heel of the foot, which are particularly durable parts. Yes, they are located so as to cover the outer surface of the upper body 11 of these portions.

The eyelet reinforcing portion 15 is an upper opening portion provided on the upper body 11 that exposes a part of the instep, which is a portion where durability is particularly required, like the toe side reinforcing portion 13 and the heel side reinforcing portion 14. It is provided to reinforce the peripheral edge (that is, the portion to which the shoelace 16 is attached), and is positioned so as to cover the outer surface of the upper main body 11 of the portion.

The toe side reinforcing portion 13, the heel side reinforcing portion 14, and the eyelet reinforcing portion 15 are fixed to the outer surface of the upper body 11 by sewing, welding, adhesion, or a combination thereof, for example, woven fabric, knitted fabric, synthetic leather, or resin. Etc.

The shoelace 16 is composed of a string-shaped member for pulling the peripheral edges of the upper opening provided on the upper body 11 to expose a part of the instep to each other in the foot width direction, and is provided on the peripheral edge of the upper opening. It is inserted through a plurality of holes. By tightening the shoelace 16 with the foot inserted in the upper body 11, the upper body 11 can be brought into close contact with the foot.

The sole 20A includes an outsole 21, a midsole 22, and an insole 23, of which the midsole 22 and the insole 23 correspond to the sole body.

The outsole 21 and the midsole 22 have a substantially flat shape as a whole formed by integrating them. The outsole 21 has a ground contact surface 21b (see FIGS. 3 and 4 and the like) on the lower surface thereof, and the midsole 22 is located above the outsole 21.

The insole 23 is attached to the upper body 11 so as to cover the lower opening of the upper body 11 described above. More specifically, the insole 23 is sewn to the lower edge of the upper body 11. Further, the insole 23 is fixed to the upper surface of the midsole 22 by adhesion or welding. The insole 23 is a woven fabric, knitted fabric or non-woven fabric made of synthetic resin fibers such as polyester, or a resin foam material containing a resin material as a main component and a foaming agent or a cross-linking agent as a sub component. Consists of. Although the insole 23 is a member that constitutes a part of the shoe sole 20A as described above, it is not necessarily an essential configuration, and it may not be provided. In that case, the sole 20A is composed of the outsole 21 and the midsole 22 as the sole body.

The insole 30 is housed inside the upper 10 as described above, and is detachably attached on the inner bottom surface of the upper 10 or fixed to the inner bottom surface of the upper 10 by welding or adhesion. The insole 30 is made of a woven fabric, knitted fabric or non-woven fabric made of synthetic resin fibers such as polyester, or a resin foam material containing a resin material as a main component and a foaming agent or a cross-linking agent as a sub component. It is arranged for the purpose of improving the foot contact. The insole 30 is not an indispensable configuration, and it may not be provided.

FIG. 3 is a side view of the sole (excluding the insole) shown in FIG. 1 as viewed from the outer foot side, and FIGS. 4 and 5 are a bottom view and a top view (middle) of the sole shown in FIG. 1, respectively. (Excluding the bottom). Further, FIG. 6 is a cross-sectional view taken along the line VI-VI shown in FIG. Hereinafter, the configuration of the sole 20A according to the present embodiment will be described in more detail with reference to FIGS. 3 to 6.

Here, as described above, the sole 20A according to the present embodiment has an insole 23 in addition to the outsole 21 and the midsole 22. However, the insole 23 is made of a member having a sufficiently thin thickness, and is usually set to a thickness of 2 mm or less. Therefore, the influence of the insole 23 on the cushioning property, stability, foot contact, etc. of the shoe sole 20A at the time of landing is relatively small, and these cushioning properties, stability, foot contact, etc. are mainly the outsole 21 and the mid. Determined by sole 22. Therefore, in the following, the description will be basically focused on the outsole 21 and the midsole 22 of the sole 20A.

As shown in FIGS. 3 to 6, the sole 20A has an outsole 21 and a midsole 22 as described above. The outsole 21 has an upper surface 21a and a ground contact surface 21b as a lower surface, and constitutes a lower portion of the sole 20A. The midsole 22 has an upper surface 22a and a lower surface 22b, and constitutes an upper portion of the sole 20A.

The sole 20A has a shape in which the peripheral edge of the upper surface 22a of the midsole 22 that defines the upper surface thereof is raised with respect to the periphery, whereby the upper surface 22a is provided with a concave portion. .. This concave portion is a portion for receiving the upper 10 and the insole 23, and the upper surface 22a excluding the peripheral edge portion, which is the bottom surface of the concave portion, has a smooth curved surface shape so as to fit the shape of the sole of the foot. have.

The outsole 21 is preferably excellent in wear resistance and grip, and from this viewpoint, the outsole 21 includes, for example, a rubber material as a main component, a plasticizer or a reinforcing agent as a sub component, and a crosslink. A member made of a material containing an agent is used.

As a result, the outsole 21 is generally composed of a hard member having a higher Young's modulus than the midsole 22. As shown in FIGS. 3 and 4, the ground contact surface 21b of the outsole 21 is provided with a tread pattern by forming irregularities on the exposed surface in order to improve grip. The shape and tread pattern of the outsole 21 are appropriately designed according to the use of the shoe 1A, and the shapes shown in FIGS. 3 and 4 are merely examples.

It is preferable that the midsole 22 has an appropriate strength and an excellent cushioning property. From this viewpoint, the midsole 22 includes, for example, a resin material as a main component and a foaming agent as a sub component. A resin foam material containing a cross-linking agent is used. Alternatively, a rubber foam material containing a rubber material as a main component and a plasticizer, a foaming agent, a reinforcing agent, and a cross-linking agent as subcomponents may be used.

As the resin material, a thermoplastic resin and a thermosetting resin can be used, as the thermoplastic resin, for example, ethylene-vinyl acetate copolymer (EVA) can be preferably used, and as the thermosetting resin, for example, polyurethane. (PU) can be preferably used. As the rubber material, for example, butadiene rubber can be preferably used.

As a result, the midsole 22 is generally composed of a soft member having a smaller Young's modulus than the outsole 21. The predetermined portion of the midsole 22 may include various cushioning parts and reinforced parts.

As shown in FIGS. 3 to 5, the sole 20A has a forefoot portion R1 that supports the toe portion and the tread portion of the foot, and a midfoot portion that supports the tread portion of the foot. It includes R2 and hindfoot R3, which is a portion that supports the heel of the foot. The forefoot portion R1, the midfoot portion R2, and the hindfoot portion R3 are positioned so as to be continuous with each other in the front-rear direction of the sole 20A.

As shown in FIGS. 5 and 6, in the sole 20A according to the present embodiment, the midsole 22 has a low hardness portion 24 made of a foam material having a relatively low hardness and a foam having a relatively high hardness. It has a high hardness portion 25 made of a material, and these low hardness portions 24 and the high hardness portion 25 are integrally formed by being joined to each other.

In general, a low-hardness foam material has a property that the compression rigidity is small and the foam material is easily deformed due to its low hardness (that is, softness). On the other hand, a foam material having a high hardness has a property of having a large compressive rigidity and being hard to be deformed due to its high hardness (that is, being hard).

Therefore, by providing the low hardness portion 24 on the midsole 22, the low hardness portion 24 is significantly deformed by receiving a load as compared with the high hardness portion 25, and mainly plays a role of absorbing the impact at the time of landing. It will be. On the other hand, by providing the high hardness portion 25 on the midsole 22, the high hardness portion 25 mainly plays a role of receiving a load without being significantly deformed as compared with the low hardness portion 24 and ensuring stability at the time of landing. Will be fulfilled.

Here, as described above, conventionally, a shoe sole in which a high-rigidity portion or a high-hardness portion is provided at a predetermined position in a lower layer portion of a midsole made of a foam material is known. In the case of a sole having such a configuration, the midsole is provided with a high-rigidity portion or a high-hardness portion, so that the stability at the time of landing is enhanced, and further, these high-rigidity portions or the high hardness Since a low-rigidity portion or a low-hardness portion is provided on the upper layer portion of the midsole so as to cover the portion, the foot contact is relatively good.

However, when this configuration is adopted, the low-rigidity portion or the low-hardness portion provided in the upper layer portion of the midsole so as to cover the high-rigidity portion or the high-hardness portion receives a load at the time of landing and is excessively deformed. In that case, it may lead to insufficient stability as desired.

In this regard, in the sole 20A according to the present embodiment, the low hardness portion 24 is provided on the midsole 22 so as to define the entire lower surface of the midsole 22, and the high hardness portion 25 is provided. Of the midsole 22, it is arranged only in a specific region of the region located above the low hardness portion 24.

More specifically, the high hardness portion 25 is a specific region (diagonal line in FIG. 5) of the upper layer portion L1 (see FIG. 6) of the midsole 22 so as to define a part of the upper surface 22a of the midsole 22. It is located in the area indicated by).

On the other hand, the low hardness portion 24 is the specific region of the upper layer portion L1 (see FIG. 6) of the midsole 22 so as to define the remaining portion of the upper surface 22a of the midsole 22 and the lower surface 22b of the midsole 22. It is arranged over the entire lower layer L2 (see FIG. 6) of the midsole 22 including the region excluding (the region other than the region shown by the diagonal line in FIG. 5) and the region located below the specific region. ..

Here, in the present embodiment, the specific region is located on the inner foot side (the side indicated by reference numeral S1 in the drawing) of the midsole 22, and more specifically, the forefoot portion R1. The part on the inner foot side including the part Q1 that supports the hallux, the part on the inner foot side of the midfoot part R2, and the part on the inner foot side of the hindfoot part R3. positioned. The portion of the hindfoot portion R3 on the inner foot side includes the portion of the hindfoot portion R3 on the inner foot side of the portion Q3 that supports the calcaneus.

That is, in the present embodiment, the high hardness portion 25 is arranged over almost the entire area of the midsole 22 except for the portion on the inner foot side and the portion on the upper layer L1 side excluding the portion on the toe side. The low hardness portion 24 is arranged in the remaining portion of the midsole 22.

By using the sole 20A and the shoe 1A provided with the sole 20A according to the present embodiment configured in this way, the heel portion falls inward more than necessary at the time of landing (shown in FIG. 6). It is possible to suppress the occurrence of (excessive collapse of the heel portion in the direction of the arrow AR1). That is, by wearing the shoe 1A according to the present embodiment, a person who is prone to overpronation can stably support the sole of the foot on the inner foot side, and along with this, the mid The pressure acting on the sole 22 can be dispersed, and excessive deformation of the mid sole 22 can be suppressed, and as a result, the occurrence of overpronation can be suppressed.

Further, by using the sole 20A and the shoe 1A provided with the sole 20A according to the present embodiment described above, it becomes possible to stably support the sole of the foot on the inner foot side portion as described above. As a result, the pressure acting on the midsole 22 can be dispersed and excessive deformation of the midsole 22 can be suppressed. Therefore, a person with valgus flat feet wears the shoe 1A according to the present embodiment. By doing so, it is possible to prevent the load from being concentrated on the inner foot side of the foot at the time of landing.

In addition, by adopting the above configuration, the low hardness portion 24 is located below the high hardness portion 25, so that the thickness of the high hardness portion 25 itself becomes relatively thin, and the high hardness portion 25 becomes the low hardness portion. Since it is made of a foam material as in the case of No. 24, good foot contact can be realized without impairing foot contact, and further weight reduction of the sole and shoes can be realized.

As described above, by using the sole 20A and the shoe 1A provided with the sole 20A according to the present embodiment, the stability at the time of landing, which is particularly suitable for a person who is prone to overpronation and a person with valgus flat feet, can be obtained. It is possible to obtain a shoe sole that is excellent, has good foot contact, and is lightweight, and a shoe equipped with the sole.

As for the hardness of the low hardness portion 24, for example, the Asker C hardness is preferably 20 degrees or more and 70 degrees or less, and more preferably 40 degrees or more and 60 degrees or less. On the other hand, the hardness of the high hardness portion 25 is preferably 60 degrees or more and 85 degrees or less, provided that the Asker C hardness thereof is higher than the Asker C hardness of the low hardness portion 24, for example. By satisfying these conditions, it is possible to make it difficult to feel the boundary between the low hardness portion 24 and the high hardness portion 25 on the sole of the foot while ensuring stability at the time of landing, and the foot contact is made more excellent. can do. Further, the difference between the Asker C hardness of the high hardness portion 25 and the Asker C hardness of the low hardness portion 24 is preferably 8 degrees or more, and more preferably 10 degrees or more.

Further, as shown in FIG. 6, at the end of the high hardness portion 25 on the outer foot side (the side indicated by reference numeral S2 in the figure) in the foot width direction, the thickness t of the high hardness portion 25 is the outer foot. If it is configured so as to decrease toward the side, it is possible to make it difficult to feel the boundary between the low hardness portion 24 and the high hardness portion 25 on the sole of the foot, and it is possible to further improve the foot contact. Further, in order to further improve the foot contact, the thickness t of the high hardness portion 25 is set to be the maximum thickness at the position closest to the edge portion on the inner foot side of the midsole 22 in the foot width direction. It is preferable to configure the thickness so that the thickness decreases as the distance from the edge portion in the foot width direction (that is, toward the outer foot side). However, it is not always necessary to change the thickness t of the high hardness portion 25 along the foot width direction, and this may be made a uniform thickness.

Here, in the present embodiment, since the shoe 1A includes the insole 23 and the insole 30, it is possible to make it more difficult to feel the boundary between the low hardness portion 24 and the high hardness portion 25 on the sole of the foot. .. However, the insole 23 and the insole 30 do not necessarily have to be provided, and shoes may not be provided with one or both of the insole 23 and the insole 30.

Further, in the sole 20A according to the present embodiment, the low hardness portion 24 and the high hardness portion 25 are joined to each other as described above, so that the midsole 22 is integrally formed by these. Such a structure can be manufactured by welding the foam material having the low hardness portion 24 and the foam material having the high hardness portion 25 by superimposing them and press-molding them. Therefore, if the manufacturing method is used, the sole 20A can be manufactured easily and inexpensively.

However, it is not always necessary to manufacture the shoe sole 20A by the above-mentioned manufacturing method. For example, the foam material having the low hardness portion 24 and the foam material having the high hardness portion 25 are joined by adhesion via an adhesive layer or the like. Alternatively, it may be manufactured by two-color molding, which is a kind of injection molding.

When the low hardness portion 24 and the high hardness portion 25 made of the foam material are simultaneously molded, it is preferable that the melting point of the material that becomes the low hardness portion 24 and the melting point of the material that becomes the high hardness portion 25 are the same. The melting point is preferably 50 ° C. or higher and 200 ° C. or lower, and more preferably 50 ° C. or higher and 140 ° C. or lower.

(1st to 4th modified examples)
7 (A), 7 (B), 8 (A) and 8 (B) are top views of the soles (excluding the insole) of the shoes according to the first to fourth modifications, respectively. .. Hereinafter, the soles 20A1 to 20A4 according to the first to fourth modifications based on the above-described first embodiment will be described with reference to these figures. The soles 20A1 to 20A4 according to the first to fourth modifications are provided in the shoe 1A instead of the above-mentioned sole 20A.

As shown in FIG. 7A, the sole 20A1 according to the first modification has a specific region of the midsole 22 which is a region provided with the high hardness portion 25 when compared with the above-mentioned sole 20A. It is a reduced version. Also in the sole 20A1 according to this modification, the specific region is located on the inner foot side of the midsole 22.

More specifically, in the sole 20A1 according to this modified example, the specific region is mainly located on the inner foot side portion including the portion Q1 of the forefoot portion R1 that supports the hallux. That is, in this modified example, the high hardness portion 25 is arranged only in the above-mentioned portion of the inner foot side portion and the upper layer portion L1 side portion of the midsole 22. Of these, the low hardness portion 24 is arranged in the remaining portion.

As shown in FIG. 7B, the sole 20A2 according to the second modification has a specific region of the midsole 22 which is a region provided with the high hardness portion 25 when compared with the above-mentioned sole 20A. It is a reduced version. Also in the sole 20A2 according to this modification, the specific region is located on the inner foot side of the midsole 22.

More specifically, in the sole 20A2 according to this modified example, the specific region is mainly located on the inner foot side portion of the hind foot portion R3. The portion of the hindfoot portion R3 on the inner foot side includes the portion of the hindfoot portion R3 on the inner foot side of the portion Q3 that supports the calcaneus. That is, in this modified example, the high hardness portion 25 is arranged only in the above-mentioned portion of the inner foot side portion and the upper layer portion L1 side portion of the midsole 22. Of these, the low hardness portion 24 is arranged in the remaining portion.

As shown in FIG. 8A, the sole 20A3 according to the third modification has a specific region of the midsole 22 which is a region provided with the high hardness portion 25 when compared with the above-mentioned sole 20A. It is a reduced version. Also in the sole 20A3 according to this modification, the specific region is located on the inner foot side of the midsole 22.

More specifically, in the sole 20A3 according to the present modification, the specific region is the portion of the forefoot R1 on the inner foot side including the portion Q1 supporting the toe, and the hindfoot R3. It is mainly located on the inner leg side of our body, independent of each other. The portion of the hindfoot portion R3 on the inner foot side includes the portion of the hindfoot portion R3 on the inner foot side of the portion Q3 that supports the calcaneus. That is, in this modification, the high hardness portion 25 is arranged only in the above-mentioned two portions of the inner foot side portion and the upper layer portion L1 side portion of the midsole 22. A low hardness portion 24 is arranged in the remaining portion of the sole 22.

As shown in FIG. 8B, the sole 20A4 according to the fourth modification has a specific region of the midsole 22 which is a region provided with the high hardness portion 25 when compared with the above-mentioned sole 20A. It is an enlarged version. In the sole 20A4 according to this modification, the specific region is located not only on the inner foot side of the midsole 22 but also on the outer foot side.

More specifically, in the sole 20A4 according to the present modification, the specific region is the part of the forefoot part R1 on the inner foot side including the part Q1 that supports the hallux, and the middle foot part R2. It is located straddling the inner foot side portion, the inner foot side portion of the hind foot portion R3, and the outer foot side portion of the hind foot portion R3. The inner foot side portion and the outer foot side portion of the hindfoot portion R3 include a portion Q3 that supports the calcaneus of the hindfoot portion R3. That is, in this modified example, in the entire portion of the midsole 22 excluding the portion on the inner foot side and the portion on the upper layer L1 side excluding the portion on the toe side, and the portion on the outer foot side. The high hardness portion 25 is arranged in the above-mentioned portion of the upper layer portion L1 side portion, and the low hardness portion 24 is arranged in the remaining portion of the midsole 22.

Even when the soles 20A1 to 20A4 and the shoes 1A provided with the soles 20A1 to 20A4 according to the first to fourth modifications are used, the effect according to the above-described first embodiment can be obtained although the degree of the effect obtained varies. This is a shoe sole that is particularly suitable for people who are prone to overpronation and those with valgus flat feet, has excellent stability at the time of landing, and has good foot contact and weight reduction. It can be a equipped shoe.

(5th to 7th modified examples)
9 to 11 are cross-sectional views of the soles (excluding the insole) of the shoes according to the fifth to seventh modifications, respectively. Hereinafter, the soles 20A5 to 20A7 according to the fifth to seventh modifications based on the above-described first embodiment will be described with reference to these figures. The soles 20A5 to 20A7 according to the fifth to seventh modifications are provided in the shoe 1A instead of the above-mentioned sole 20A.

As shown in FIG. 9, the sole 20A5 according to the fifth modification has a different structure of the midsole 22 when compared with the above-mentioned sole 20A, and a high hardness portion 25 is provided accordingly. The composition of the specific region of the midsole 22 which is the region is also different from that of the sole 20A described above.

Specifically, in the sole 20A5 according to this modification, the midsole 22 is composed of a lower midsole portion 221 and an upper midsole portion 222 that are integrated by being joined. That is, the midsole 22 includes a lower midsole portion 221 and an upper midsole portion 222 having a flat plate-like shape, and these are laminated in the thickness direction thereof and joined by welding, adhesion, or the like. Therefore, it is configured to have a flat shape as a whole.

A specific region of the midsole 22 which is a region where the high hardness portion 25 is provided is provided at a predetermined position of the upper midsole portion 222, and the specific region reaches the upper surface and the lower surface of the upper midsole portion 222, respectively. It is located like. The formation position of the specific region when the sole 20A5 is viewed in a plan view is the same as that of the above-mentioned sole 20A.

Even when the sole 20A5 according to this modification is used, the low hardness portion 24 is provided on the midsole 22 so as to define the entire lower surface of the midsole 22 as in the case of the sole 20A described above. At the same time, the high hardness portion 25 is arranged only in a specific region of the midsole 22 located above the low hardness portion 24. Therefore, the effect according to the above-described first embodiment can be obtained.

In this modification, the lower midsole portion 221 and the lower hardness portion 24 of the upper midsole portion 222 may be made of different types of foam materials, or may be made of the same type of foam material. Good. In particular, when the lower midsole portion 221 and the low hardness portion 24 of the upper midsole portion 222 are made of different types of foam materials, the midsole 22 has various functions depending on the combination thereof. It becomes possible to make it.

As shown in FIG. 10, the sole 20A6 according to the sixth modification is a region of the midsole 22 provided with the high hardness portion 25 when compared with the sole 20A5 according to the fifth modification described above. The configuration is different only in that the specific areas are different.

Specifically, the specific region of the midsole 22, which is the region where the high hardness portion 25 is provided, is provided only on the lower surface side portion of the upper midsole portion 222, and is provided on the upper surface side of the upper midsole portion 222. It is not provided in the part. Along with this, the high hardness portion 25 is embedded inside the midsole 22 along the thickness direction, and the upper surface and the lower surface of the midsole 22 are both defined by the low hardness portion 24. .. The formation position of the specific region when the sole 20A6 is viewed in a plan view is the same as that of the above-mentioned sole 20A.

In this configuration, the low hardness portion 24 is located above the high hardness portion 25. However, in this modification, when the minimum value of the thickness dimension of the midsole 22 is T1 and the maximum value of the thickness of the midsole 22 located below the high hardness portion 25 is T2, these T1 and T2 satisfies the condition of T2 ≧ (1/2) × T1. With such a configuration, the low hardness portion 24 of the portion located above the high hardness portion 25 becomes sufficiently thin, so that stability at the time of landing can be ensured. In order to further increase the stability, the thickness of the low hardness portion 24 of the portion located above the high hardness portion 25 may be less than one-fourth of the value of T1.

Even when the sole 20A6 according to this modification is used, the low hardness portion 24 is provided on the midsole 22 so as to define the entire lower surface of the midsole 22 as in the case of the sole 20A described above. At the same time, the high hardness portion 25 is arranged only in a specific region of the midsole 22 located above the low hardness portion 24. Therefore, the effect according to the above-described first embodiment can be obtained.

As shown in FIG. 11, the sole 20A7 according to the seventh modification is a region of the midsole 22 provided with the high hardness portion 25 when compared with the sole 20A5 according to the fifth modification described above. The configuration is different only in that the specific areas are different.

Specifically, the specific region of the midsole 22, which is the region where the high hardness portion 25 is provided, is provided only on the upper surface side portion of the lower midsole portion 221 and is provided on the upper midsole portion 222 and the lower side. It is not provided on the lower surface side of the midsole portion 221. Along with this, the high hardness portion 25 is embedded inside the midsole 22 along the thickness direction, and the upper surface and the lower surface of the midsole 22 are both defined by the low hardness portion 24. .. The formation position of the specific region when the sole 20A7 is viewed in a plan view is the same as that of the above-mentioned sole 20A.

In this configuration, the low hardness portion 24 is located above the high hardness portion 25. However, also in this modification, when the minimum value of the thickness dimension of the midsole 22 is T1 and the maximum value of the thickness of the midsole 22 located below the high hardness portion 25 is T2, these T1 and T2 satisfies the condition of T2 ≧ (1/2) × T1. With such a configuration, the low hardness portion 24 of the portion located above the high hardness portion 25 becomes sufficiently thin, so that stability at the time of landing can be ensured. In order to further increase the stability, the thickness of the low hardness portion 24 of the portion located above the high hardness portion 25 may be less than one-fourth of the value of T1.

Even when the sole 20A7 according to this modification is used, the low hardness portion 24 is provided on the midsole 22 so as to define the entire lower surface of the midsole 22 as in the case of the sole 20A described above. At the same time, the high hardness portion 25 is arranged only in a specific region of the midsole 22 located above the low hardness portion 24. Therefore, the effect according to the above-described first embodiment can be obtained.

In this modification, the low hardness portion 24 of the lower midsole portion 221 and the upper midsole portion 222 may be made of different types of foam materials, or may be made of the same type of foam material. Good. In particular, when the low hardness portion 24 of the lower midsole portion 221 and the upper midsole portion 222 are made of different types of foam materials, the midsole 22 has various functions depending on the combination thereof. It becomes possible to make it.

(8th and 9th modified examples)
12 and 13 are cross-sectional views of the sole of the shoe according to the eighth and ninth modifications, respectively. Hereinafter, the soles 20A8 and 20A9 according to the eighth and ninth modifications based on the above-described first embodiment will be described with reference to these figures. The soles 20A8 and 20A9 according to the 8th and 9th modifications are provided in the shoe 1A instead of the above-mentioned sole 20A.

As shown in FIG. 12, the sole 20A8 according to the eighth modification is different in the configurations of the midsole 22 and the insole 23 when compared with the above-mentioned sole 20A, and is correspondingly low. The structure of the sole body, which is the portion where the hardness portion 24 and the high hardness portion 25 are provided, is significantly different from that of the above-mentioned sole 20A.

Specifically, in the sole 20A8 according to this modification, not only the midsole 22 but also the insole 23 is made of a foam material, and the midsole 22 is made of a foam material having a relatively low hardness. It is composed of a low hardness portion 24, and the insole 23 is composed of a low hardness portion 24 made of a relatively low hardness foam material and a high hardness portion 25 made of a relatively high hardness foam material. ing.

As a result, in the sole 20A8 according to the present modification, the low hardness portion 24 is provided on the midsole 22 so as to define the entire lower surface of the midsole 22, and the high hardness portion 25 is medium. Of the bottom 23, it is arranged only in a specific region of the region located above the low hardness portion 24 provided on the midsole 22. The formation position of the specific region when the sole 20A8 is viewed in a plan view is the same as that of the above-mentioned sole 20A.

Therefore, even when the sole 20A8 according to the present modification is used, the effect according to the above-described first embodiment can be obtained, which is particularly suitable for a person who is prone to overpronation and a person with valgus flat feet. In addition, it is possible to obtain a sole that is excellent in stability at the time of landing, has good foot contact, and is lightweight, and a shoe equipped with the sole.

Here, as described above, the insole 23 is usually composed of a member whose thickness is sufficiently thin, and therefore, the insole 23 has a cushioning property, stability, foot contact, etc. of the shoe sole 20A8 at the time of landing. Has a relatively small effect. However, if the high hardness portion 25 provided on the insole 23 is set to a considerably high hardness, or if the thickness of the insole 23 itself is made thicker than usual, the thickness of the high hardness portion 25 is increased. , This can have a relatively large effect on the cushioning property, stability, foot contact, etc. of the sole 20A8.

Therefore, by adopting the above configuration while considering these, as described above, it is possible to obtain the effect according to the above-described first embodiment. In this modification, the case where the low hardness portion 24 of the insole 23 is made of a foam material having a relatively low hardness is illustrated, but this is made of a woven fabric, a knitted fabric, a synthetic leather, or the like. May be.

As shown in FIG. 13, the sole 20A9 according to the ninth modification has the same configuration of the midsole 22 as compared with the above-mentioned sole 20A, but the configuration of the insole 23 is different. Along with this, the configuration of the sole body, which is a portion provided with the low hardness portion 24 and the high hardness portion 25, is different from that of the above-mentioned sole 20A.

Specifically, in the sole 20A9 according to the present modification, the insole 23 has a low hardness made of a foam material having a relatively low hardness, as in the case of the sole 20A8 according to the eighth modification described above. It is composed of a portion 24 and a high-hardness portion 25 made of a relatively high-hardness foam material, and the insole 23 is arranged above the midsole 22 and joined to the insole 23. As a result, the high hardness portion 25 provided on the midsole 22 and the high hardness portion provided on the insole 23 are integrated. The formation position of the specific region when the sole 20A9 is viewed in a plan view is the same as that of the above-mentioned sole 20A.

Even when the sole 20A9 according to this modification is used, it has almost the same configuration as the case where the sole 20A is used as described above, and the low hardness portion 24 defines the entire lower surface of the midsole 22. The high hardness portion 25 is provided on the midsole 22 and is arranged only in a specific region of the midsole 22 and the insole 23 located above the low hardness portion 24. Therefore, the effect according to the above-described first embodiment can be obtained.

(Embodiment 2)
FIG. 14 is a top view of the sole (excluding the insole) of the shoe according to the second embodiment, and FIG. 15 is a cross-sectional view taken along the line XV-XV shown in FIG. Hereinafter, the sole 20B and the shoe 1B provided with the sole 20B according to the present embodiment will be described with reference to FIGS. 14 and 15. The shoe 1B according to the present embodiment includes an upper and an insole having the same configuration as the shoe 1A according to the above-described embodiment.

As shown in FIGS. 14 and 15, in the sole 20B according to the present embodiment, the midsole 22 is made of a foam material having a relatively low hardness, similarly to the sole 20A according to the first embodiment described above. It has a low-hardness portion 24 and a high-hardness portion 25 made of a relatively high-hardness foam material, and the low-hardness portion 24 and the high-hardness portion 25 are integrally joined to each other. It is configured in.

In the sole 20B according to the present embodiment, the high hardness portion 25 is a specific region of the upper layer portion L1 (see FIG. 15) of the midsole 22 so as to define a part of the upper surface 22a of the midsole 22. It is arranged in (the area indicated by the diagonal line in FIG. 14).

On the other hand, the low hardness portion 24 is the specific region of the upper layer portion L1 (see FIG. 15) of the midsole 22 so as to define the remaining portion of the upper surface 22a of the midsole 22 and the lower surface 22b of the midsole 22. It is arranged over the entire lower layer L2 (see FIG. 15) of the midsole 22 including the region excluding (the region other than the region shown by the diagonal line in FIG. 14) and the region located below the specific region. ..

Here, in the present embodiment, the specific region is located on the outer foot side (the side indicated by reference numeral S2 in the drawing) of the midsole 22, and more specifically, the forefoot portion R1. The part on the outer foot side including the part Q2 that supports the small toe, the part on the outer foot side of the midfoot part R2, and the part on the outer foot side of the hindfoot part R3. positioned. The portion of the hindfoot portion R3 on the outer foot side includes the portion on the outer foot side of the portion Q3 that supports the calcaneus of the hindfoot portion R3.

That is, in the present embodiment, the high hardness portion 25 is arranged over almost the entire area of the midsole 22 except for the portion on the outer foot side and the portion on the upper layer L1 side excluding the portion on the toe side. The low hardness portion 24 is arranged in the remaining portion of the midsole 22.

By using the sole 20B and the shoe 1B provided with the sole 20B according to the present embodiment configured in this way, the heel portion does not sufficiently fall inward at the time of landing (shown in FIG. 15). It is possible to suppress the occurrence of insufficient collapse of the heel portion in the direction of the arrow AR1). That is, by wearing the shoe 1B according to the present embodiment, a person who is prone to underpronation can stably support the sole of the foot on the outer foot side, and along with this, the mid The pressure acting on the sole 22 can be dispersed, and excessive deformation of the mid sole 22 can be suppressed, and as a result, the occurrence of underpronation can be suppressed.

Further, by using the sole 20B and the shoe 1B provided with the sole 20B according to the present embodiment described above, it becomes possible to stably support the sole of the foot on the outer foot side portion as described above. Along with this, the pressure acting on the midsole 22 can be dispersed, and excessive deformation of the midsole 22 can be suppressed. Therefore, a person with O legs wears the shoe 1B according to the present embodiment. By wearing it, it is possible to prevent the load from being concentrated on the outer foot side of the foot at the time of landing.

As described above, by using the sole 20B and the shoe 1B provided with the sole 20B according to the present embodiment, the stability at the time of landing is excellent, which is particularly suitable for people who are prone to underpronation and people with O-legs. At the same time, it is possible to provide a shoe sole having a good foot contact and a weight reduction, and a shoe equipped with the sole.

As shown in FIG. 15, at the end of the high hardness portion 25 on the inner foot side (the side indicated by reference numeral S1 in the figure) in the foot width direction, the thickness t of the high hardness portion 25 is the inner foot side. If it is configured so as to decrease toward the foot, it is possible to make it difficult to feel the boundary between the low hardness portion 24 and the high hardness portion 25 on the sole of the foot, and it is possible to further improve the foot contact. Further, in order to further improve the foot contact, the thickness t of the high hardness portion 25 is set to the maximum thickness at the position closest to the outer foot side edge of the midsole 22 in the foot width direction. It is preferable to configure the thickness so that the thickness decreases as the distance from the edge portion in the foot width direction (that is, toward the inner foot side). However, it is not always necessary to change the thickness t of the high hardness portion 25 along the foot width direction, and this may be made a uniform thickness.

(10th to 13th modified examples)
16 (A), 16 (B), 17 (A) and 17 (B) are top views (excluding the insole) of the sole of the shoe according to the tenth to thirteenth modifications, respectively. .. Hereinafter, the soles 20B1 to 20B4 according to the tenth to thirteenth modifications based on the above-described second embodiment will be described with reference to these figures. The soles 20B1 to 20B4 according to the tenth to thirteenth modifications are provided in the shoe 1B instead of the above-mentioned sole 20B.

As shown in FIG. 16A, the sole 20B1 according to the tenth modification has a specific region of the midsole 22 which is a region provided with the high hardness portion 25 when compared with the above-mentioned sole 20B. It is a reduced version. Also in the sole 20B1 according to this modification, the specific region is located on the outer foot side of the midsole 22.

More specifically, in the sole 20B1 according to this modified example, the specific region is mainly located on the outer foot side portion including the portion Q2 of the forefoot portion R1 that supports the small toe. That is, in this modified example, the high hardness portion 25 is arranged only in the above-mentioned portion of the portion on the outer leg side and the portion on the upper layer portion L1 side of the midsole 22. Of these, the low hardness portion 24 is arranged in the remaining portion.

As shown in FIG. 16B, the sole 20B2 according to the eleventh modification has a specific region of the midsole 22 which is a region provided with the high hardness portion 25 when compared with the above-mentioned sole 20B. It is a reduced version. Also in the sole 20B2 according to this modification, the specific region is located on the outer foot side of the midsole 22.

More specifically, in the sole 20B2 according to this modified example, the specific region is mainly located on the outer foot side portion of the hind foot portion R3. The portion of the hindfoot portion R3 on the outer foot side includes the portion on the outer foot side of the portion Q3 that supports the calcaneus of the hindfoot portion R3. That is, in this modified example, the high hardness portion 25 is arranged only in the above-mentioned portion of the portion on the outer leg side and the portion on the upper layer portion L1 side of the midsole 22. Of these, the low hardness portion 24 is arranged in the remaining portion.

As shown in FIG. 17A, the sole 20B3 according to the twelfth modification has a specific region of the midsole 22 which is a region provided with the high hardness portion 25 when compared with the above-mentioned sole 20B. It is a reduced version. Also in the sole 20B3 according to this modification, the specific region is located on the outer foot side of the midsole 22.

More specifically, in the sole 20B3 according to this modified example, the specific region is the portion of the forefoot portion R1 on the outer foot side including the portion Q2 that supports the small toe, and the hindfoot portion R3. It is mainly located on the outer leg side of our body, independent of each other. The portion of the hindfoot portion R3 on the outer foot side includes the portion on the outer foot side of the portion Q3 that supports the calcaneus of the hindfoot portion R3. That is, in this modified example, the high hardness portion 25 is arranged only in the above-mentioned two portions of the outer foot side portion and the upper layer portion L1 side portion of the midsole 22. A low hardness portion 24 is arranged in the remaining portion of the sole 22.

As shown in FIG. 17B, the sole 20B4 according to the thirteenth modification has a specific region of the midsole 22 which is a region provided with the high hardness portion 25 when compared with the above-mentioned sole 20B. It is an enlarged version. In the sole 20B4 according to this modification, the specific region is located not only on the outer foot side of the midsole 22 but also on the inner foot side.

More specifically, in the sole 20B4 according to the present modification, the specific region is the part of the forefoot part R1 on the outer foot side including the part Q2 supporting the small toe, and the middle foot part R2. It is located straddling the outer foot side portion, the outer foot side portion of the hind foot portion R3, and the inner foot side portion of the hind foot portion R3. The outer foot side portion and the inner foot side portion of the hindfoot portion R3 include a portion Q3 that supports the calcaneus of the hindfoot portion R3. That is, in this modified example, in the entire portion of the midsole 22 excluding the portion on the outer foot side and the portion on the upper layer L1 side excluding the portion on the toe side, and the portion on the inner foot side. The high hardness portion 25 is arranged in the above-mentioned portion of the upper layer portion L1 side portion, and the low hardness portion 24 is arranged in the remaining portion of the midsole 22.

Even when the soles 20B1 to 20B4 and the shoes 1B provided with the soles 20B1 to 20B4 according to the tenth to thirteenth modifications are used, the effect according to the above-described second embodiment can be obtained although the degree of the effect obtained varies. It is equipped with a shoe sole that is particularly suitable for people who are prone to underpronation and people with O-legs, has excellent stability at the time of landing, and has good foot contact and weight reduction. Can be used as shoes.

(Embodiment 3)
FIG. 18 is a top view of the sole (excluding the insole) of the shoe according to the third embodiment, and FIG. 19 is a cross-sectional view taken along the line XIX-XIX shown in FIG. Hereinafter, the sole 20C and the shoe 1C provided with the sole 20C according to the present embodiment will be described with reference to FIGS. 18 and 19. The shoe 1C according to the present embodiment includes an upper and an insole having the same configuration as the shoe 1A according to the above-described embodiment.

As shown in FIGS. 18 and 19, in the sole 20C according to the present embodiment, the midsole 22 is made of a foam material having a relatively low hardness, similarly to the sole 20A according to the first embodiment described above. It has a low-hardness portion 24 and a high-hardness portion 25 made of a relatively high-hardness foam material, and the low-hardness portion 24 and the high-hardness portion 25 are integrally joined to each other. It is configured in.

In the sole 20C according to the present embodiment, the high hardness portion 25 is a specific region of the upper layer portion L1 (see FIG. 19) of the midsole 22 so as to define a part of the upper surface 22a of the midsole 22. It is arranged in (the area shown by the diagonal line in FIG. 18).

On the other hand, the low hardness portion 24 is the specific region of the upper layer portion L1 (see FIG. 19) of the midsole 22 so as to define the remaining portion of the upper surface 22a of the midsole 22 and the lower surface 22b of the midsole 22. It is arranged over the entire lower layer L2 (see FIG. 19) of the midsole 22 including the region excluding (the region other than the region shown by the diagonal line in FIG. 18) and the region located below the specific region. ..

Here, in the present embodiment, the specific region is mainly located in the hindfoot portion R3 including the portion Q3 that supports the calcaneus. That is, in the present embodiment, the high hardness portion 25 is arranged only in the above-mentioned portion of the portion of the midsole 22 on the rear end side and the portion on the upper layer portion L1 side, and the midsole. A low hardness portion 24 is arranged in the remaining portion of 22.

By using the sole 20C and the shoe 1C provided with the sole 20C according to the present embodiment configured in this way, the heel portion is stably supported by the midsole 22 at the time of landing, and accordingly. Therefore, the pressure acting on the midsole 22 can be dispersed, and excessive deformation of the midsole 22 can be suppressed. Therefore, it is possible to prevent the heel portion from wobbling at the time of landing (for example, the heel portion tilts more than necessary in the direction of the arrow AR1 or AR2 shown in FIG. 19).

As described above, by using the sole 20C and the shoe 1C provided with the sole 20C according to the present embodiment, the sole and the sole are excellent in stability at the time of landing, have good foot contact, and are lightweight. Can be a shoe equipped with.

(Summary of Disclosure Contents in Embodiment)
The characteristic configurations disclosed in the above-described embodiments 1 to 3 and the modified examples thereof can be summarized as follows.

The sole according to a certain aspect of the present disclosure is a forefoot portion that supports the toe and tread of the foot, a midfoot that supports the tread, and a posterior that supports the ankle of the foot. The foot portion is provided in a row in the front-rear direction, and includes an outsole provided with a ground contact surface and a sole body located above the outsole. The sole body includes a low-hardness portion made of a relatively low-hardness foam material and a high-hardness portion made of a relatively high-hardness foam material. The low hardness portion is provided so as to define the entire lower surface of the sole body, and the high hardness portion is only in a specific region of the region located above the low hardness portion of the sole body. Have been placed.

The sole body may have a midsole in the sole according to a certain aspect of the present disclosure. In that case, both the low hardness portion and the high hardness portion may be provided on the midsole, and the midsole is joined to each other by the low hardness portion and the high hardness portion. It may be integrally configured.

In the sole according to a certain aspect of the present disclosure, the high hardness portion is arranged in the specific region of the upper layer portion of the midsole so as to define a part of the upper surface of the midsole. In that case, the specific region of the upper layer portion of the midsole is defined so that the low hardness portion defines the rest of the upper surface of the midsole and the lower surface of the midsole. It may be arranged over the entire lower layer portion of the midsole including the area to be excluded and the area located below the specific area.

In the sole according to a certain aspect of the present disclosure, the high hardness portion may be embedded inside the midsole along the thickness direction, and in that case, the low hardness portion may be embedded. , The upper surface of the midsole and the lower surface of the midsole may be arranged over the entire region excluding the specific region of the midsole.

In the sole according to a certain aspect of the present disclosure, the midsole may include a lower midsole portion and an upper midsole portion laminated along the thickness direction, in which case. , The high hardness portion may be provided on the upper surface side portion of the lower midsole portion and / or the lower surface side portion of the upper midsole portion.

In the sole according to a certain aspect of the present disclosure, the sole body may have a mid sole and an insole. In that case, the high hardness portion may be provided on the insole, or the low hardness portion may be provided on the midsole.

In the first aspect of the sole according to the aspect of the present disclosure, the specific area is located on the inner foot side of the sole body.

In the first aspect, the specific region may be located on the inner foot side of the hind foot.

In the first aspect, the specific region is formed on the inner foot side portion of the forefoot portion including the portion supporting the hallux and the inner foot side portion of the hind foot portion. They may be located independently of each other.

In the first aspect, the specific region includes a portion of the forefoot portion that supports the toes, a portion of the midfoot portion that is on the inner foot side, and a portion of the midfoot portion that is on the inner foot side. It may be located straddling the inner foot side portion of the hind foot portion.

In the first aspect, the specific region is a portion of the forefoot portion on the inner foot side including a portion supporting the toes, a portion of the middle foot portion on the inner foot side, and the posterior portion. It may be located straddling the inner foot side portion of the foot portion and the outer foot side portion of the hind foot portion.

In the first aspect, the thickness of the high hardness portion may decrease toward the outer foot side at the end portion of the high hardness portion on the outer foot side in the foot width direction.

In the second aspect of the sole according to the aspect of the present disclosure, the specific area is located on the outer foot side of the sole body.

In the second aspect, the specific region is formed on the outer foot side portion including the portion of the forefoot portion that supports the small toes and the outer foot side portion of the middle foot portion. It may be located straddling.

In the second aspect, the thickness of the high hardness portion may decrease toward the inner foot side at the end portion of the high hardness portion on the inner foot side in the foot width direction.

In the third aspect of the sole according to the aspect of the present disclosure, the specific area is located in the portion of the sole body including the portion supporting the calcaneus.

In the sole according to a certain aspect of the present disclosure, the asker C hardness of the low hardness portion is 40 degrees or more and 60 degrees or less, and the asker C hardness of the high hardness portion is the low hardness portion. It is preferably 60 degrees or more and 85 degrees or less on condition that it is higher than the Asker C hardness of.

A shoe according to a certain aspect of the present disclosure includes a sole according to the above-mentioned aspect of the present disclosure and an upper located above the sole.

(Other forms, etc.)
The specific shape, configuration, number, position, etc. of each part shown in the above-described first to third embodiments and the modified examples thereof can be changed as appropriate. For example, in the figure, the case where the boundary surface between the midsole and the outsole and the boundary surface between the lower midsole portion and the upper midsole portion are formed in a planar shape is illustrated, but this is referred to as a curved surface shape. can do. Further, a cushioning part for exerting a further cushioning function may be provided at a specific part of the sole body including the midsole or the insole in addition to the midsole.

Further, the characteristic configurations shown in the above-described embodiments 1 to 3 and the modified examples thereof can be combined with each other. For example, the configuration in the thickness direction of the midsole and / or the insole as in the fifth to ninth modifications based on the first embodiment, the sole based on the second or third embodiment and the shoe provided with the sole. It can also be applied to.

Further, in the above-described first to third embodiments and modifications thereof, a shoe configured so that the upper body is brought into close contact with the foot by using a shoelace has been described as an example. The shoes may be configured so that they can be brought into close contact with the foot by a hook-and-loop fastener, or by using a sock-shaped upper body, the upper body can be brought into close contact with the foot simply by inserting the foot into the upper body. It may be used as shoes.

The above-described embodiment and its modifications disclosed this time are examples in all respects and are not restrictive. The technical scope of the present invention is defined by the claims and includes all modifications within the meaning and scope equivalent to the description of the claims.

1A to 1C shoes, 10 upper, 11 upper body, 12 tongue, 13 toe side reinforcement, 14 heel side reinforcement, 15 eyelet reinforcement, 16 shoe lace, 20A, 20A1 to 20A9, 20B, 20B1 to 20B4, 20C shoes Bottom, 21 outsole, 21a upper surface, 21b ground contact surface, 22 midsole, 22a upper surface, 22b lower surface, 221 lower midsole part, 222 upper midsole part, 23 insole, 24 low hardness part, 25 high hardness part, 30 Insoles, L1 upper layer, L2 lower layer, Q1 part that supports the mother toe, Q2 part that supports the small toe, Q3 part that supports the heel bone, R1 forefoot part, R2 midfoot part, R3 hindfoot part.

Claims

The forefoot part that supports the toes and the tread part of the foot, the midfoot part that supports the tread part of the foot, and the hindfoot part that supports the heel part of the foot are provided in a row in the anteroposterior direction. It ’s a sole
An outsole with a tread and
With a sole body located above the outsole,
The sole body includes a low-hardness portion made of a relatively low-hardness foam material and a high-hardness portion made of a relatively high-hardness foam material.
The low hardness portion is provided so as to define the entire lower surface of the sole body.
A sole in which the high hardness portion is arranged only in a specific region of the region located above the low hardness portion of the sole body.
The sole body has a mid sole and
Both the low hardness portion and the high hardness portion are provided on the midsole.
The sole according to claim 1, wherein the midsole is integrally formed by joining the low hardness portion and the high hardness portion to each other.
The high hardness portion is arranged in the specific region of the upper layer portion of the midsole so as to define a part of the upper surface of the midsole.
A region of the upper layer portion of the midsole excluding the specific region and a lower portion of the specific region so that the low hardness portion defines the rest of the upper surface of the midsole and the lower surface of the midsole. The sole according to claim 2, which is arranged over the entire lower layer portion of the midsole including the area located in.
The high hardness portion is embedded inside the midsole along the thickness direction.
The sole according to claim 2, wherein the low hardness portion is arranged over the entire region of the midsole excluding the specific region so as to define an upper surface of the midsole and a lower surface of the midsole. ..
The midsole includes a lower midsole portion and an upper midsole portion laminated along the thickness direction.
The sole according to claim 4, wherein the high hardness portion is provided on a portion on the upper surface side of the lower midsole portion and / or a portion on the lower surface side of the upper midsole portion.
The sole body has a midsole and an insole.
The high hardness portion is provided at least on the insole, and the high hardness portion is provided.
The sole according to claim 1, wherein the low hardness portion is provided at least on the midsole.
The sole according to any one of claims 1 to 6, wherein the specific area is located on the inner foot side of the sole body.
The sole according to claim 7, wherein the specific area is located on the inner foot side of the hind foot.
Claims that the specific region is located independently of the inner foot side portion of the forefoot portion including a portion supporting the hallux and the inner foot side portion of the hind foot portion. Item 7. The sole according to item 7.
The specific region is the part of the forefoot that includes the part supporting the hallux, the part of the midfoot that is on the side of the inner foot, and the part of the hindfoot that is on the side of the inner foot. The sole according to claim 7, which is located across the portion of.
The specific region is a portion of the forefoot portion on the inner foot side including a portion supporting the hallux, a portion of the midfoot portion on the inner foot side, and a portion of the hindfoot portion on the inner foot side. The sole according to claim 7, wherein the sole is located so as to straddle the outer foot side portion of the hind foot portion.
The sole according to any one of claims 1 to 6, wherein the thickness of the high hardness portion decreases toward the outer foot side at the end portion on the outer foot side in the foot width direction of the high hardness portion.
The sole according to any one of claims 1 to 6, wherein the specific area is located on a portion of the sole body on the outer foot side.
A claim that the specific region is located so as to straddle a portion of the forefoot portion on the outer foot side including a portion supporting a small toe and a portion of the midfoot portion on the outer foot side. Item 13. The sole according to item 13.
The sole according to claim 13 or 14, wherein the thickness of the high hardness portion decreases toward the inner foot side at the end portion on the inner foot side in the foot width direction of the high hardness portion.
The sole according to any one of claims 1 to 6, wherein the specific area is located in a portion of the sole body including a portion supporting the calcaneus.
The Ascar C hardness of the low hardness portion is 40 degrees or more and 60 degrees or less.
The sole according to any one of claims 1 to 16, wherein the Asker C hardness of the high hardness portion is 60 degrees or more and 85 degrees or less on condition that the Asker C hardness of the low hardness portion is higher than the Asker C hardness of the low hardness portion.
The sole according to any one of claims 1 to 17,
A shoe with an upper located above the sole.