WO2014068635A1

WO2014068635A1 - Shoe sole designed for windlass mechanism

Info

Publication number: WO2014068635A1
Application number: PCT/JP2012/077867
Authority: WO
Inventors: 亜友別所; 健太森安; 西脇　剛史; 久範藤田
Original assignee: 株式会社アシックス
Priority date: 2012-10-29
Filing date: 2012-10-29
Publication date: 2014-05-08
Also published as: JP5350566B1; US20150250260A1; JPWO2014068635A1; EP2912961A4; EP2912961A1

Abstract

A second transverse groove provided between Lisfranc joint and Chopart's joint including the navicular bone, which is the highest in the foot arch, is deeper than a first transverse groove and is the same as or deeper than a third transverse groove. Thus, the remainder of the midsole is thin and plantar flexion for the shoe sole can be easily done, and the highest region of the arch can easily be displaced upwards. Accordingly, fallen arches can be suppressed even when exercising for an extended time. Meanwhile, a bending region containing at least one third transverse groove is provided directly below the talus bone and is wider than other transverse grooves. Thus, the rear part of the foot directly below the talus bone can bend easily, and displacement of the arch region in the upward direction is facilitated.

Description

Sole that focuses on windlass mechanism

The present invention relates to a shoe sole focusing on a windlass mechanism.

A shoe having a plurality of lateral grooves extending in the lateral direction on the bottom surface of the shoe sole is well known.

US7,168,190 B1 (front page) US2011-016746 A1 (front page) US2011-232130 A1 (front page) PCT / US2004 / 033111 (Summary) JP07-289306 A (summary)

However, these prior arts focus on the windlass mechanism and will not use it.
Here, it is known that the plantar aponeurosis is tensioned and the ribs are pulled forward and the arch height is increased when the MP joint is hyperextended, and this series of movements is called a windlass mechanism. .

It is known that when the arch is raised by the windlass mechanism, kick force can be transmitted efficiently when kicking out such as walking or running. On the other hand, a decrease in arch can cause flat feet and hallux valgus.

In recent years, shoes that have been used to solidify the middle foot with resin parts are difficult to deform the middle foot of the sole, restraining the movement of the foot. Therefore, the deformation of the foot arch tends to be small. Therefore, even if the toe portion has a structure that is easily bent, the sole does not bend so that the arch portion of the sole becomes convex upward.

On the other hand, in recent years, shoes whose soles are easily deformed have also been released, but these shoes tend to cause the arch portion of the sole to fall and the arch of the foot to fall. Therefore, the arch is unlikely to rise with these shoes. That is, no shoes have been developed that can easily take advantage of the windlass mechanism during travel.

Accordingly, an object of the present invention is to provide a sole structure that can raise and maintain the arch height of a foot by utilizing a windlass mechanism.

The shoe sole of the present invention
An outsole having a ground contact surface and disposed at least on the front foot and the rear foot;
A midsole disposed above the outsole and provided on the forefoot, middle foot and rear foot, the outsole and / or midsole,
A first lateral groove extending laterally continuously from the medial edge to at least the long axis of the foot at the position of the metatarsal phalanx joint of the first to third heels and / or the base of the proximal phalanx;
At least one second lateral groove extending continuously laterally from the inner edge to at least the major axis between the first heel Chopard joint and the rear end of the Lisfranc joint;
Defining at least one third transverse groove extending laterally continuously from the inner edge to at least the major axis between the front end and the rear end of the talar,
The second and third lateral grooves are provided so as to be recessed upward from the bottom surface of the shoe sole,
Each groove has a front wall surface defining each groove and a rear wall surface facing the front wall surface,
The average value of the widths of the bent regions from the front front wall surface of the at least one third horizontal groove to the rearmost rear wall surface of the at least one third horizontal groove is the rearmost wall surface. Greater than the average groove width of the first transverse grooves and greater than the average groove width of each of the second transverse grooves,
The average depth of the at least one second lateral groove is greater than the average depth of the first lateral groove, and is equal to or greater than the average depth of the third lateral grooves.

According to the present invention, the presence of the second lateral groove and the third lateral groove makes it possible to deform (bend) the rear foot portion from the middle foot portion of the shoe sole to a convex shape upward. Therefore, at the time of raising the toe facing upward and the MP joint extending in the first transverse groove, the plantar muscle group including at least the plantar aponeurosis is rolled upward, and the plantar aponeurosis becomes tense, Makes the arch easy to rise.

In particular, the second transverse groove provided between the Chopard joint including the scaphoid bone having the highest foot arch and the Lisfranc joint is deeper than the first transverse groove, and is the same as or deeper than the third transverse groove. Therefore, the remainder of the midsole is thin, the shoe sole is easily bent, and the highest arch portion is easily displaced upward.
That is, when no reinforcing device is provided in the midfoot, the midsole of the midfoot tends to be thicker along the arch of the foot. Therefore, since the depth of the second lateral groove is large, the shoe sole is easily bent in the second lateral groove even if the entire midsole is thick on average.
Therefore, it is possible to suppress the arch from being lowered even if the exercise is continued for a long time.

On the other hand, the bent region including at least one third lateral groove is provided directly below the talus and is wider than the other lateral grooves. Therefore, it is easy for the hind leg to bend just below the talus, and it helps to displace the arch part upward.

In addition, the groove width of the second lateral groove is smaller than the width of the bent region, so that the arch can be prevented from being lowered. Further, the width of the bent region is wide, so that it is easy to compress and deform, and shock applied to the heel can be buffered.

In the present invention, the term “bending region” means that when there are a plurality of third lateral grooves, a front wall surface of a plurality of third lateral grooves just below the talus and a rear wall surface of the plurality of third lateral grooves. It means that the groove ratio of the total value of the groove widths of the plurality of third lateral grooves with respect to the distance to the rearmost rear wall surface is 30% or more and less than 100%. This is because if it is less than 30%, it is difficult to obtain sufficient bending. For the same reason, the groove ratio is preferably 40% or more, and most preferably 50% or more.

In the present invention, the “long axis of the foot” is represented by a straight line connecting the midpoint of the center of the baseball and the center of the small Ryukyu and the center of the heel.
Further, the phrase “extending in the horizontal direction” means including a shape extending obliquely or extending in a curved manner in addition to the right side perpendicular to the major axis.
In addition, the phrase “the first transverse groove extends in the lateral direction at the position of the bone joint of the first heel to third heel MP joint (medium foot phalanx joint) or the proximal phalanx” is at least part of the first transverse groove. Is provided so as to overlap with a part of the bone base of the MP joint or the proximal phalanx of the first to third heels.

In the present invention, the term “groove width” means the width at the lower end where the groove opens. Therefore, the average groove width means an average value of the width at the lower end where the groove opens. The term “average groove width” means that the width of the first or second lateral groove may be locally larger than the width of the bent region.

The groove width of each groove is preferably about 1 mm to 50 mm.
The reason why the groove width of each groove is 1 mm or more is to allow the shoe sole to bend upward in the middle foot part in a convex shape. If the groove width exceeds 50 mm, the stability of foot support will be hindered.

Note that the term “average depth” means that the first or third lateral groove may be locally deeper than the second lateral groove. Further, the average depth when the groove is V-shaped or U-shaped means a value obtained by averaging the maximum depths in a cross section parallel to the long axis. In other words, it means the average depth for a region where V-shaped or U-shaped valleys are connected.

1 is a schematic inner side view of a shoe for a left foot according to Embodiment 1 of the present invention. FIG. 2 is a schematic outer side view of the shoe for the right foot. FIG. 3 is a schematic bottom view of the same. FIG. 4 is a schematic inner side view showing the shoe sole in a bent state. FIG. 5 is a schematic bottom view of a shoe sole according to the second embodiment. FIG. 6 is a schematic inner side view of a shoe according to Example 3 of the present invention. FIG. 7 is a schematic inner side view of a shoe according to Example 4 of the present invention. FIG. 8 is a schematic inner side view of a shoe according to Example 5 of the present invention. FIG. 9 is a schematic inner side view of a shoe sole according to a sixth embodiment of the present invention. FIG. 10 is a schematic bottom view of a shoe sole according to the seventh embodiment. FIG. 11 is a schematic sectional view of a shoe according to Example 8 of the present invention. FIG. 12 is a schematic sectional view showing a state in which the sole of the shoe is bent. It is a top view which shows the frame | skeleton of a leg | foot. 14A, 14B, and 14C are graphs showing test results for Test Example 1, Test Example 2, and Comparative Example, respectively.

Preferably, an average groove width of at least one third horizontal groove among the third horizontal grooves is larger than an average groove width of the first horizontal groove and larger than an average groove width of each of the second horizontal grooves.
In this case, the bending performance of the hind legs will be further enhanced.

More preferably, an auxiliary lateral groove extending continuously laterally from the inner edge to at least the major axis is further provided at a position directly below the bone bottom or body of the first metatarsal bone.
In this case, since the auxiliary lateral groove is disposed slightly in front of the deepest second lateral groove, the shoe sole will be easily bent along the shape of the arch with the scaphoid bone as the apex. .

Incidentally, the bone body means a portion between the bone bottom and the bone head, and the thickness generally changes smoothly. The bone bottom refers to a portion of each bone that is slightly swollen near the posterior (mineral) joint, and is also called a proximal head. On the other hand, the bone head refers to a portion of each bone near the anterior (toe side) joint that swells slightly thickly, and is also called a distal bone head.

More preferably, the average depth of the auxiliary transverse groove is smaller than the average depth of the second transverse groove, and the average groove width of the auxiliary transverse groove is at least one third transverse groove of the third transverse grooves. Smaller than the average groove width.
An auxiliary transverse groove with a small depth and width will further smooth the bending of the sole along the arcuate shape with the scaphoid apex, and also helps to reduce the arch of the foot There is no fear of doing it.

Preferably, the first lateral groove is recessed upward from the ground contact surface.
This makes it easier for the MP joint to extend in the first transverse groove.

In this case, more preferably, each groove is defined by the front wall surface and the rear wall surface and the upper top surface,
The thickness from the upper surface of the midsole to the top surface of the first lateral groove is set to 0.5 mm or more and 10 mm or less and less than 12 mm in the thinnest part,
The thickness from the upper surface of the midsole to the top surface of the second lateral groove is set to 0.5 mm or more and 10 mm or less in the thinnest part,
The thickness from the upper surface of the midsole to the top surface of the third lateral groove is set to 0.5 mm or more and 10 mm or less in the thinnest portion.

In this case, the midsole bends at the thinnest portion. Therefore, the thickness to the top surface of the first lateral groove exceeds 12 mm at the thinnest portion, or the thickness to the top surface of the second and third horizontal grooves exceeds 10 mm at the thinnest portion. And the midsole will not bend easily.
If the thinnest part is less than 0.5 mm, it will be difficult to manufacture the midsole.

Preferably, the maximum depth of the second and third lateral grooves is 5 mm or more and 40 mm or less,
The maximum depth of each of the second lateral grooves is greater than the thickness of the portion of the midsole directly above the portion of the lateral groove having the maximum depth,
The maximum depth of each of the third lateral grooves is greater than the thickness of the portion of the midsole directly above where the lateral groove portion having the maximum depth is provided.

In this case, since the second and third lateral grooves are deep, a thin portion is formed in the midfoot portion of the midsole, and the shoe sole can be bent at the midfoot portion.

Preferably, the average depth of the second and third lateral grooves is 5 mm or more and 40 mm or less,
The average depth of at least one, preferably two or more second horizontal grooves of each of the second horizontal grooves is greater than the average thickness of the midsole portion directly above the portion of the horizontal grooves,
The average depth of at least one third horizontal groove of each of the third horizontal grooves is larger than the average thickness of the midsole portion immediately above where the horizontal groove portion is provided.

In this case, the second and third lateral grooves are deep and the midsole is thin, so that the bending of the shoe sole at the midfoot is further facilitated.

If the maximum depth or average depth is less than 5 mm, the shoe sole will not bend easily. On the other hand, if these values exceed 40 mm, the shoe sole will be too thick.

Preferably, the second transverse groove extends continuously from the inner edge to the outer edge of the foot so as to cross the sole.
The second lateral groove has an average depth inside the foot larger than an average depth outside the foot.

The foot arch is higher on the inside than on the outside. Therefore, the average depth of the second lateral groove is larger on the inner side than on the outer side, so that the shoe sole is easily bent as the foot arch rises.

Preferably, the third transverse groove extends continuously from the inner edge to the outer edge of the foot so as to cross the sole.
The third lateral groove has an average depth inside the foot larger than an average depth outside the foot.

The foot arch is higher on the inside than on the outside. Therefore, the average depth of the third lateral groove is larger on the inner side than on the outer side, so that the shoe sole is easily bent as the foot arch rises.
Preferably, a plurality of the second transverse grooves are provided, an average depth of the at least two second transverse grooves is larger than an average depth of the first transverse grooves, and an average depth of the third transverse grooves is Same or larger.
In this case, the middle foot portion is easily bent smoothly.

Preferably, a plurality of the third transverse grooves are provided, and an average groove width of at least two of the third transverse grooves is larger than an average groove width of the first transverse grooves, and It is larger than the average groove width of the two horizontal grooves.
In this case, the rear end of the middle foot part is easily bent smoothly along the rear part of the foot arch.

Preferably, the shoe sole further includes a longitudinal groove extending from the first lateral groove to the third lateral groove,
It is arranged in the longitudinal groove, extends from the front foot part forward of the first lateral groove to the rear foot part behind the third lateral groove, and is fixed to the shoe sole at the front foot part and the rear foot part. And a band portion made of a material that is more difficult to extend than the midsole and the outsole.

In this case, when the footpad is raised, a load similar to that of the plantar aponeurosis is applied to the band portion. At this time, since the band is difficult to stretch, the shoe sole bends. Therefore, the arch is likely to rise when the toes are raised.

More preferably, a wear-resistant material that is less likely to wear than the band portion is attached to the lower surface of the band portion, and the band portion and the wear-resistant material form a band.
In this case, the band can be arranged at a site close to the ground plane.

More preferably, the bottom surface of the band is disposed above the ground surface.

When there is a protrusion such as a stone on the road surface, there is a risk that a bending force may be inadvertently applied to the shoe sole when the band steps on the protrusion. The careless bending can be suppressed because the bottom surface of the band is floating.

The invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings, in which: 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.
1 to 4 show a first embodiment. For easy understanding of the invention, FIG. 1 shows the inner surface of the shoe for the left foot, and conversely, FIG. 2 shows the outer surface of the shoe for the right foot.

As shown in FIGS. 1 and 2, the shoe sole includes an outsole 1 and a midsole 2. In each drawing, fine grooves (so-called designs) formed on the ground contact surface 1S of the outsole 1 are omitted.

In the case of the present embodiment, the outsole 1 and the midsole 2 are disposed on the front foot F, the middle foot M, and the rear foot R. The outsole 1 is formed of, for example, a rubber foam or a non-foam, and has higher wear resistance than the midsole 2 and has a grounding surface 1s that contacts the road surface.

The midsole 2 is formed of a foam of resin such as EVA, for example, and is disposed on the outsole 1 as shown in FIG. 2 to alleviate the impact of landing. Therefore, the midsole 2 is formed thicker than the outsole 1.

As for the hardness of the midsole 2, for example, JISC hardness is preferably 45 to 75 degrees, and more preferably 50 to 70 degrees.

In the present embodiment, a first lateral groove G 1, a second lateral groove G 2, a third lateral groove G 3 and an auxiliary lateral groove G 4 are formed in both the outsole 1 and the midsole 2. As shown in FIG. 3, each of the lateral grooves G1 to G4 extends from the inner edge 10 to the outer edge 11 in an oblique direction orthogonal to or intersecting with the long axis A1.
As shown in FIG. 13, the long axis A1 is arranged on a straight line connecting the midpoint O3 of the main ball O1 and the small ball O5 and the center O4 of the eyelid.

In FIG. 1, the first transverse groove G1 is formed from the inner edge 10 to the outer edge 11 (FIG. 3) at the position of the bone foot B30 of the middle foot phalangeal joint MP and / or the proximal phalange B3. Extends in the transverse direction X until the distance X is reached. The first lateral groove G1 facilitates bending of the metatarsophalangeal joint MP.

The second lateral groove G2 continuously extends in the lateral direction X from the inner edge 10 to the outer edge 11 (FIG. 3) between the first heel Chopard joint JS and the rear end JLb of the Lisfranc joint JL. . In the case of this embodiment, two (a plurality of) second lateral grooves G2 are provided, and the two second lateral grooves G2 cooperate with each other to form a bent region MA of the middle leg.
Note that NB is a scaphoid bone and CB is an inner wedge bone.

The third lateral groove G3 continuously extends in the lateral direction X from the inner edge 10 to the outer edge 11 (FIG. 3) between the front end Tf and the rear end Tb of the talar Ta. In the case of the present embodiment, two (a plurality) third lateral grooves G3 are provided, and the two third lateral grooves G3 cooperate with each other to form a bent area BA of the hind legs.

The auxiliary transverse groove G4 continuously extends in the transverse direction X from the inner edge 10 to the outer edge 11 (FIG. 3) at a position just below the bone bottom B40 or the bone body B41 of the first metatarsal B4.
In the case of the present embodiment, two (a plurality of) auxiliary lateral grooves G4 are provided, and the two auxiliary lateral grooves G4 cooperate with each other to form an auxiliary bending area SA.

The first to fourth lateral grooves G1 to G4 are provided so as to be recessed upward from the bottom surface of the shoe sole, that is, in the case of this embodiment, from the ground contact surface 1s. The first lateral groove G1 may be formed so as to be recessed downward from the upper surface of the midsole 2.

Each of the grooves G1 to G4 has a front wall surface Fw that defines the grooves G1 to G4, a rear wall surface Bw that faces the front wall surface Fw, and a top surface T0.

In the case of the present embodiment, the bent region MA of the middle foot is formed from the foremost front wall surface Fw of the front wall surfaces Fw of the plurality of second lateral grooves G2 to the rear wall surface Bw of the plurality of second lateral grooves G2. Are defined in the region up to the rearmost rear wall surface Bw. The average value of the width D20 of the bent area MA of the middle foot is larger than the average groove width D1 of the first lateral groove G1.
The average value of the width D20 of the bent leg MA may be equal to or less than the average distance from the front end Tf to the rear end Tb of the talar Ta.

The bent area BA of the rear foot is the rearmost rear of the rear wall surface Bw of the plurality of third lateral grooves G3 from the front wall surface Fw of the front surface Fw of the plurality of third lateral grooves G3. It is defined by the area up to the wall surface Bw. The average value Da of the rear leg bending area BA is larger than the average groove width D1 of the first lateral groove G1 and larger than the average groove width D20 of the middle leg bending area MA.

In the case of this embodiment, the average groove width D3 of each of the third horizontal grooves G3 is larger than the average groove width D1 of the first horizontal grooves G1 and larger than the average groove width D2 of each of the second horizontal grooves G2.

In order to expect the foot arch to rise due to the windlass, it is necessary to bend and deform the

soles

1 and 2 so that they protrude upward in the middle foot M. At this time, the groove widths of the second to fourth lateral grooves G2 to G4 may be reduced. There are also manufacturing problems. Therefore, the average groove width of each of the first to fourth lateral grooves G1 to G4 will need to be at least about 1 mm.

Meanwhile, the maximum value of the average groove width of the first to fourth lateral grooves G1 to G4 will be 50 mm. When this value exceeds 50 mm, the sole itself that supports the sole sinks downward, causing a decrease in the arch.
From the above viewpoint, the range of the average groove widths of the first to fourth lateral grooves G1 to G4 is preferably 2 mm to 40 mm, and most preferably about 3 mm to 30 mm.

As can be seen by comparing FIG. 1 and FIG. 2, each of the second to fourth lateral grooves G2 to G4 becomes shallower from the inner edge 10 toward the outer edge 11.
Therefore, the second lateral groove G2 has an average depth inside the foot larger than an average depth outside the foot. Similarly, the third lateral groove G3 has an average depth inside the foot larger than an average depth outside the foot. Similarly, in the fourth lateral groove G4, the average depth inside the foot is larger than the average depth outside the foot.

In FIG. 2, the average depth H2 of each second lateral groove G2 is greater than the average depth H1 of the first lateral groove G1, and is equal to or greater than the average depth H3 of each third lateral groove G3. Is also big.
Meanwhile, the average depth H4 of the auxiliary horizontal groove G4 is smaller than the average depth H2 of the second horizontal groove G2, and the average groove width D4 of the auxiliary horizontal groove G4 is the average of the third horizontal groove G3. It is smaller than the groove width D3.

The average depths H2 and H3 of the second and third lateral grooves G2 and G3 are set to about 5 mm to 40 mm. When the average depths H2 and H3 are smaller than 5 mm, it is difficult to expect the effect of the present mechanism. On the other hand, when the average depths H2 and H3 are larger than 40 mm, the sole becomes too thick. From this viewpoint, the above value is preferably 7 mm to 35 mm, and most preferably 10 mm to 30 mm.

The average depth H2 of at least one second horizontal groove G2 in each of the second horizontal grooves G2 is larger than the average thickness T2a of the portion of the midsole 2 immediately above where the horizontal groove portion is provided. On the other hand, the average depth H3 of at least one third horizontal groove G3 of the third horizontal grooves G3 is larger than the average thickness T3a of the portion of the midsole 2 directly above the portion of the horizontal grooves.

For the same reason as the average depth, the maximum depth Hm of the second and third lateral grooves G2 and G3 in FIG. 1 is preferably about 5 mm to 40 mm, more preferably about 7 mm to 35 mm, and most preferably about 10 mm to 30 mm. preferable.

The average depth H2 of each of the two second lateral grooves G2 is greater than the average depth H1 of the first lateral grooves G1, and is equal to or greater than the average depth H3 of each of the third lateral grooves G3. large.

In FIG. 1, the maximum depth Hm of each of the second lateral grooves G2 is larger than the thickness of the portion of the midsole 2 immediately above where the lateral groove portion having the maximum depth is provided. On the other hand, the maximum depth Hm of each of the third lateral grooves G3 is greater than the thickness of the portion of the midsole 2 directly above where the lateral groove portion having the maximum depth is provided.

As shown in FIG. 1, a thickness T1 from the upper surface of the midsole 2 to the top surface T0 of the first lateral groove G1 is set to 0.5 mm or more and less than 12 mm in the thinnest portion.
On the other hand, the thickness T2 from the upper surface of the midsole 2 to the top surface T0 of the second lateral groove G2 is set to 0.5 mm or more and 10 mm or less in the thinnest portion.
A thickness T3 from the upper surface of the midsole 2 to the top surface T0 of the third lateral groove G3 is set to 0.5 mm or more and 10 mm or less in the thinnest portion.

Each average groove width D3 of each of the two third horizontal grooves G3 is larger than the average groove width D1 of the first horizontal groove G1 and larger than the average groove width D2 of each of the second horizontal grooves G2.

Next, the deformation of the shoe in this embodiment will be briefly described.
When the forefoot F in FIG. 1 faces upward as indicated by a solid line from the phantom line in FIG. 4 and the MP joint MP extends in the first lateral groove G1, the forefoot aponeurosis is wound upward. I'm nervous and my leg arch is going to be taller. At this time, in the second to fourth lateral grooves G2 to G4, the lower portion of the sole is contracted in the long axis direction Y, and the outsole 1 and the midsole 2 are deformed in a convex shape upward. Therefore, the foot arch tends to be high during the operation.

Next, another example of the present invention will be described.
In the following other examples, the same reference numerals are given to the same or corresponding parts as in the first embodiment, and only the structure different from the first embodiment will be described.

As shown in Example 2 in FIG. 5, a part or all of the second to fourth lateral grooves G2 to G4 exceed the major axis A1 from the inner edge 10 toward the outer edge 11, and to the outer edge 11. It may be set to a length that does not reach the maximum. The arch of the foot is high on the inside. Therefore, if the inside of the sole is sufficiently bent, the effect of the windlass mechanism can be expected.

Preferably, the lateral grooves G1 to G4 may be about 2/3 of the entire width from the inner edge 10 to the outer edge 11 in the portion where the lateral grooves G1 to G4 are provided.
In contrast to the example shown in FIG. 5, the second and third lateral grooves G2 and G3 are provided over the entire width, and the first and fourth lateral grooves G1 and G4 extend from the inner edge 10 beyond the major axis A1 to the outer portion. It may be provided up to a part of.

Further, like the first horizontal groove G1 shown in FIG. 5, each of the horizontal grooves G1 to G4 does not need to extend in a direction orthogonal to the long axis A1, and may extend in a direction that crosses obliquely.

In Example 3 of FIG. 6, a single second lateral groove G2 that is deeper than the third lateral groove G3, that is, only one may be provided. In this example, the depth of the second horizontal groove G2 immediately before the rear second horizontal groove G2 is smaller than one of the third horizontal grooves G3.

As in this example, when there is one second lateral groove G2 deeper than the third lateral groove G3, it is preferable that at least the top surface T0 of the second lateral groove G2 is arranged directly below the boat-like bone NB. This is because the scaphoid NB is located at the apex of the arch of the foot.

In Example 4 of FIG. 7, only one each of the first horizontal groove G1, the second horizontal groove G2, and the third horizontal groove G3 are provided. In this case, the width Da of the third lateral groove G3 substantially matches the bent area BA of the rear foot.

As shown in Examples 5 and 6 of FIGS. 8 and 9, the width D2 of the second lateral groove G2 may be larger than the widths D3 of all the third lateral grooves G3. In each embodiment, the cross-sectional shape of each of the lateral grooves G1 to G4 may be an inverted U shape, an inverted V shape, a trapezoidal shape, or the like.

10 to 12 show Example 7. FIG.
In this example, the shoe sole is further formed with a vertical groove GL extending from the first horizontal groove G1 to the third horizontal groove G3 in FIG. A part of the band 3 is accommodated in the vertical groove GL.

The band 3 in FIG. 11 is formed by laminating a band portion 30 and an abrasion resistant material 31 with each other. The wear resistant material 31 is made of rubber, for example, and is less likely to wear than the band portion 30. On the other hand, the band part 30 is formed of a non-stretchable tape material. Accordingly, the band 3 is a band-shaped member that hardly stretches even when pulled but can be bent and loosened.

The band 3 extends from the front foot part F forward of the first lateral groove G1 to the rear foot part R rearward of the third lateral groove G3, and is attached to the shoe sole at the front foot part F and the rear foot part R. It is fixed.

As shown in FIG. 11, the bottom surface of the band 3 is disposed above the grounding surface 1s. In the front foot portion F and the rear foot portion R, the band 3 is sandwiched between the outsole 1 and the midsole 2, and the lower surface of the band 3 is in a suspended state.

As shown in FIG. 12, the band 3 is tensioned when the toe is raised or bent, and as shown by the solid line, helps the middle foot M bend so that the arch of the sole becomes higher.

Next, in order to clarify the effect of the present invention, test examples (Samples 1 and 2) and a comparative example (Ref.) Are shown.
First, as a sample, a sample 1 having a structure specified in FIGS. 1 to 4 and a sample 2 having a structure specified in FIGS. 10 to 12 were prepared. On the other hand, a general school shoe without a deep lateral groove was prepared as a comparative example.

Using one male as a test subject, a plurality of deformation angles of the sole and the foot during running (3.5 min / km) were measured, and the average value was calculated.
The angle θ on the vertical axis in FIG. 14A indicates the raising angle of the first eyelid. The angle As on the vertical axis in FIG. 14B indicates the bending angle with the middle foot portion of the sole as the center. The angle Af on the vertical axis in FIG. 14C indicates the bending angle of the vertical arch of the foot.
In FIG. 14A to FIG. 14C, the horizontal axis represents the time from landing to take off in 100 minutes.

As can be seen from FIG. 14A, Sample 1 and Sample 2 have a larger angle θ, that is, the lift angle of the first eyelid, during the heel contact, heel rise, and toe-off periods as compared with the comparative example.

As can be seen from FIG. 14B, Sample 1 and Sample 2 have a larger angle As, that is, a bending angle centered on the midfoot portion of the sole, in the period of heel contact, heel rise, and toe off, as compared with the comparative example. In particular, it can be seen that Sample 2 provided with a band has a larger value of the angle As than Sample 1.

As can be seen from FIG. 14C, it can be seen that Sample 1 and Sample 2 have a smaller angle Af, that is, the bending angle of the longitudinal arch of the foot, in the heel contact, as compared with the comparative example. But,
The angle Af is large during the heel rise and toe off periods. In particular, it can be seen that the sample 2 provided with the band 3 has a larger value of the angle Af than the sample 1.

From the above, it can be expected that the shoes of the

samples

1 and 2 exhibit a windlass mechanism, and that the foot arch height can be increased and maintained by wearing the shoes of the

samples

1 and 2.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, the first lateral groove may be provided only on one of the outsole and the midsole.
Further, the band itself may be formed of an abrasion resistant material such as aramid fiber. Moreover, when providing a band, the 2nd horizontal groove G2 and the 3rd horizontal groove G3 may be the same depth and width | variety.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.

The present invention can be used as a shoe sole for walking, running, training and the like.

1: Outsole 1s: Ground plane
2: Midsole
3: Band 30: Band part 31: Wear resistant material 10: Inner edge 11: Outer edge A1: Long axis
B3: Basic phalanx B30: Bone bottom B4: First metatarsal bone B40: Bone bottom B41: Bone body BA: Bending area of hind leg MA: Bending area of middle leg SA: Auxiliary bending areas D1, D2, D3 , D4: Average groove width Da, D20: Width Bw: Rear wall surface Fw: Front wall surface T0: Top surface F: Front foot part M: Middle foot part R: Rear foot part G1: First lateral groove G2: Second lateral groove G3: First 3 transverse grooves G4: auxiliary transverse grooves GL: longitudinal grooves H1, H2, H3, H4: average depth Hm: maximum depth JS: Chopard joint JL: Lisfranc joint JLb: posterior end NB: scaphoid CB: medial wedge bone MP: Metatarsophalangeal joint Ta: Talar Tb: Rear end Tf: Front end T1, T2, T3: Thickness T2a, T3a: Average thickness X: Lateral direction Y: Long axis direction

Claims

A sole,
An outsole 1 having a ground contact surface 1s and disposed at least on the front foot F and the rear foot R;
A midsole 2 disposed above the outsole 1 and provided on the forefoot part F, the middle foot part M and the rear foot part R, the outsole 1 and / or the midsole 2 comprising:
It extends in the lateral direction X continuously from the inner edge 10 to at least the long axis A1 of the foot at the position of the bone bottom B30 of the middle foot phalangeal joint MP and / or the proximal phalange B3. A first lateral groove G1,
At least one second lateral groove G2 extending continuously in the lateral direction X from the inner edge 10 to at least the long axis A1 between the first Chopard joint JS and the rear end Sb of the Lisfranc joint JL ,
At least one third lateral groove G3 extending continuously in the lateral direction X from the inner edge 10 to at least the major axis A1 between the front end Tf and the rear end Tb of the talar Ta is defined, ,
The second and third lateral grooves G3 are provided so as to be recessed upward from the bottom surfaces 1s, 2s of the shoe sole,
Each of the grooves G1 to G3 has a front wall surface Fw defining each groove and a rear wall surface Bw facing the front wall surface Fw,
Bending region BA from the front front wall surface Fw of the front wall surface Fw of the at least one third horizontal groove G3 to the rearmost rear wall surface Bw of the rear wall surface Bw of the at least one third horizontal groove G3. The average value of the width Da is larger than the average groove width D1 of the first horizontal groove G1, and larger than the average groove width D2 of the second horizontal grooves G2.
The average depth H2 of the at least one second lateral groove G2 is greater than the average depth H1 of the first lateral groove G1, and is equal to or greater than the average depth H3 of the third lateral grooves G3. large.
The shoe sole according to claim 1, wherein an average groove width D3 of at least one third horizontal groove G3 among the third horizontal grooves G3 is larger than an average groove width D1 of the first horizontal groove G1, and each second It is larger than the average groove width D2 of the lateral groove G2.
3. The auxiliary transverse groove G4 according to claim 2, wherein the transverse groove G4 extends continuously in the transverse direction X from the inner edge 10 to at least the long axis A1 at a position directly below the bone bottom B40 or the bone body B41 of the first metatarsal B4. Is further provided.
In Claim 3, the average depth H4 of the auxiliary horizontal groove G4 is smaller than the average depth H2 of the second horizontal groove G2, and the average groove width of the auxiliary horizontal groove G4 is equal to that of the third horizontal groove G3. It is smaller than the average groove width D3 of at least one third lateral groove G3.
The shoe sole of claim 1,
The first lateral groove G1 is recessed upward from the grounding surface 1s.
6. The shoe sole according to claim 5, wherein each of the grooves G1 to G3 is defined by the front wall surface Fw and the rear wall surface Bw and the upper top surface T0.
The thickness T1 from the upper surface of the midsole 2 to the top surface T0 of the first lateral groove G1 is set to 0.5 mm or more and less than 12 mm in the thinnest portion,
A thickness T2 from the upper surface of the midsole 2 to the top surface T0 of the second lateral groove G2 is set to 0.5 mm or more and 10 mm or less in the thinnest portion,
A thickness T3 from the upper surface of the midsole 2 to the top surface T0 of the third lateral groove G3 is set to 0.5 mm or more and 10 mm or less in the thinnest portion.
The shoe sole of claim 1,
The maximum depth Hm of the second and third lateral grooves G2, G3 is 5 mm or more and 40 mm or less,
The maximum depth Hm of each of the second lateral grooves G2 is larger than the thickness of the portion of the midsole 2 directly above the portion of the lateral groove having the maximum depth,
The maximum depth Hm of each of the third lateral grooves G3 is larger than the thickness of the portion of the midsole 2 directly above where the lateral groove portion having the maximum depth is provided.
The shoe sole of claim 1,
Average depths H2 and H3 of the second and third lateral grooves G2 and G3 are 5 mm or more and 40 mm or less,
The average depth H2 of at least one second horizontal groove G2 of each of the second horizontal grooves G2 is larger than the average thickness T2a of the portion of the midsole 2 directly above the portion of the horizontal groove,
The average depth H3 of at least one third horizontal groove G3 among the third horizontal grooves G3 is larger than the average thickness T3a of the portion of the midsole 2 directly above the portion of the horizontal groove.
The shoe sole of claim 1,
The second lateral groove G2 extends continuously from the inner edge 10 to the outer edge 11 of the foot so as to cross the sole.
In the second lateral groove G2, the average depth inside the foot is greater than the average depth outside the foot.
The shoe sole of claim 1,
The third lateral groove G3 extends continuously from the inner edge 10 to the outer edge 11 of the foot so as to cross the sole.
In the third lateral groove G3, the average depth inside the foot is greater than the average depth outside the foot.
The shoe sole of claim 1,
A plurality of the second lateral grooves G2 are provided, the average depth H2 of each of the at least two second lateral grooves G2 is greater than the average depth H1 of the first lateral grooves G1, and each of the third lateral grooves G3. Is equal to or greater than the average depth H3.
The shoe sole of claim 2,
A plurality of the third lateral grooves G3 are provided, and an average groove width of at least two third lateral grooves G3 of the third lateral grooves G3 is larger than an average groove width D1 of the first lateral grooves G1, and It is larger than the average groove width D2 of each second lateral groove G2.
The shoe sole of claim 1,
A vertical groove GL extending from the first horizontal groove G1 to the third horizontal groove G3 is further formed in the shoe sole,
It is disposed in the longitudinal groove GL and extends from the front foot portion F forward of the first lateral groove G1 to the rear foot portion R behind the third lateral groove G3, and the front foot portion F and the rear foot portion R. And a band portion 30 made of a material that is fixed to the shoe sole and is less likely to extend than the midsole 2 and the outsole 1.
The sole of claim 13,
A wear resistant material 31 that is less likely to wear than the band portion 30 is attached to the lower surface of the band portion 30, and the band 3 is formed by the band portion 30 and the wear resistant material 31.
The sole of claim 14,
The bottom surface of the band 3 is disposed above the ground surface 1s.