WO2015052768A1

WO2015052768A1 - Exercise shoe sole

Info

Publication number: WO2015052768A1
Application number: PCT/JP2013/077319
Authority: WO
Inventors: 坂本　賢志; 麻衣中田; 恵三中西; 隆行瓶内; 惇竹井
Original assignee: 株式会社アシックス; 坂本　賢志; 麻衣中田; 恵三中西; 隆行瓶内; 惇竹井
Priority date: 2013-10-08
Filing date: 2013-10-08
Publication date: 2015-04-16
Also published as: EP3056105A4; EP3056105A1; JPWO2015052768A1; JP5591420B1

Abstract

The present invention is provided with a plate that has a higher Young's modulus than that of a midsole and an outsole, and extends to the hindfoot from the midfoot at a position between the top surface of the outsole and the top surface of the midsole. The midsole is provided with: a low-hardness region provided to a region that is the majority of the hindfoot and the majority of the midfoot; and a high-hardness region that is disposed between the Chopart's joint and the rear end of the heel, is provided to at least a portion of a central section and/or a portion of an outer section among an inner section, central section, and outer section resulting from dividing the hindfoot into three equal parts in a transverse direction perpendicular to the longitudinal direction of the foot, and has a hardness greater than that of the material forming the low-hardness region. The plate is disposed extending to the front, directly below, and behind the high-hardness region.

Description

Athletic shoe soles

[Industrial Applicability] The present invention relates to a shoe sole of an athletic shoe suitable for outdoor running or exercise walking in addition to indoor shoes such as handball and basketball.

For example, in running and walking, improvement of cushioning properties is being pursued.
In addition, the handball is shot with one foot when shooting. There is a need for shoes that can jump high when this one foot is crossed.

JP2000-083705A (Abstract) JP 2005-279020A (Abstract) JP2003-009903A (abstract) JP2006-000311A (abstract) JP2010-538788W (Abstract)

FIG. 6A is a side view schematically showing the movement of a conventional sole of a shaft foot during a jump shot in a handball. In addition, 1 is an outsole and 2 is a midsole.

At the time of one-foot jump, after running (running up), the heel contact HC where the rear foot of the shaft foot contacts the ground is followed by the foot flat FF where the entire sole contacts the ground. From the heel contact HC to the foot flat FF, a brake that cancels the inertia of the running acts on the shaft foot.

However, the inertia of traveling cannot be completely eliminated by the brake of the shaft foot, and the brake is applied to the shaft foot even at the time of heel rise when the heel is separated from the floor from the foot flat FF. Therefore, there will be a loss in jump power.
In addition, the center of gravity of the body has moved forward from the axle due to the inertia of the traveling, and it will be difficult to exert the jumping power.
As another problem, when the heel contact HC is shifted to the foot flat FF, there is a case where an impact is felt after the buttocks are touched.

The first object of the present invention is to improve the cushioning property, and the second object is to provide the structure of the shoe sole of an athletic shoe that can increase the jump height in a one-leg jump.

In one aspect, the shoe sole of the present invention has an outsole 1 having a ground contact surface,
A midsole 2 disposed above the outsole 1;
Young that is located between the upper surface of the outsole 1 and the upper surface of the midsole 2 and that is continuous from the middle foot part 5M to the rear foot part 5R and is larger than the Young's modulus of the material of the outsole 1 and the midsole 2 A plate 3 made of a material having a rate,
The midsole 2 has a low hardness region 20 provided in most of the middle foot portion 5M and most of the rear foot portion 5R;
An inner part 2M, a central part 2C, and an outer part that are arranged between the Chopard joint JS and the rear end of the rib BC and that divide the rear foot part 5R into three equal parts in the transverse direction X perpendicular to the long axis CL of the foot. A high hardness region 21 provided in at least a part of the central part 2C and / or a part of the outer part 2L of the part 2L,
The hardness of the foam forming the high hardness region 21 is larger than that of the low hardness region 20, and the plate 3 is arranged continuously in front of, under and behind the high hardness region 21. Here, “between the Chopard joint JS and the rear end of the rib BC” means “between the front end of the Chopard joint and the rear end of the rib BC”.

For example, it is preferable that a jump shot of a handball game avoids a collision with a defense at the time of the same shot and performs the same shot as close to the goal as possible. That is, at the time of the same shot, it is preferable to apply the brake with one foot from the running (one foot) and jump one foot as high as possible from the point of departure. However, it is difficult to completely eliminate the inertia of the running with the brake of the axle foot, so it is inevitable that the inertia remains to some extent.

In the present invention, the deformation and effect of the sole at the time of one-leg jump will be described with reference to the drawings.
FIG. 6B is a side view schematically showing the deformation of the sole when jumping on one foot.
When jumping on one foot, first touch the ground from the rear end of the shaft foot near the outside. At the time of the heel contact HC, the low hardness region 20 that is softer than the high hardness region 21 is compressed obliquely, and at the same time, the high hardness region 21 is hardly compressed and deformed, and the rear portion of the plate 3 is also inclined. The plate 3 extends from the rear foot portion 5R to the middle foot portion 5M through the lower portion of the hard high hardness region 21, and is thus curved (bend and deformed) so as to be convex downward. Will absorb the energy and increase the brake impulse. Here, “brake impulse” means “integral value of force acting as a brake”.

続い Following the heel contact HC, the foot sole FF shifts to the foot flat FF where the entire sole is grounded. During the heel contact HC, the plate 3 exhibits a bending deformation, the high hardness region 21 is compressed and deformed, and the apparent hardness of the high hardness region 21 is further increased. Thereby, the plate 3 is bent so as to protrude downward with the high hardness region 21 as a fulcrum, but the heel side of the plate 3 is not easily bent. As a result, after the braking force is generated due to the buttock grounding, the entire sole of the foot will be smoothly grounded when shifting to the foot flat FF.

At the time of the foot flat FF, the curved plate 3 is sandwiched between the sole and the floor to restore the original shape. By restoring the plate 3, the stepping force (vertical force) on the floor surface increases. Increasing the stepping force will contribute to an increase in gripping force and increase the brake impulse.

Subsequent to the foot flat FF, the heel rises where the heel is separated from the floor surface, the player jumps upward, and the entire sole is separated from the floor surface.

Here, if a large amount of inertia remains during the heel rise, the position of the center of gravity of the body is positioned forward of the foot, and therefore it is necessary to exert the jumping force upward and continue to apply the brake. Therefore, it becomes a factor that the jump height decreases.

On the other hand, if the inertia of the running is small during the heel rise, the position of the center of gravity of the body is close to just above the foot, so that it is easy to exert a jumping force. That is, in the present invention, as described above, the brake impulse for reducing the inertia of the traveling between the heel contact HC and the foot flat FF is large, so that the jump height will be increased.

As another effect, as described above, at the time of transition from the heel contact HC to the foot flat FF, the plate 3 is curved so as to protrude downward after the contact of the buttocks, and the outsole 1 has a round shape. The entire surface of the sole touches down smoothly, and the plate 3 acts like a leaf spring. The deformation of the shoe sole including the plate 3 absorbs the impact during the first strike. Therefore, cushioning performance during running and walking will also be improved.

In the present invention, if the high hardness region 21 is disposed forward of the front end of the Chopard joint, or disposed rearward of the rear end of the rib BC, the plate 3 and the low hardness at the time of the heel contact HC. The amount of compressive deformation in the region 20 tends to be insufficient.

“The plate 3 is continuous from the middle foot portion 5M to the rear foot portion 5R” means that the plate 3 requires the continuity that the deformation received by the plate 3 at the rear foot portion 5R is transmitted to the middle foot portion 5M of the plate 3 It means that there is.

In another aspect, the sole of the present invention is an outsole 1 having a ground contact surface,
A midsole 2 disposed above the outsole 1;
A Young's modulus greater than the Young's modulus of the outsole 1 and the midsole 2 at a position between the upper surface of the outsole 1 and the upper surface of the midsole 2 and connected from the middle foot 5M to the rear foot 5R. A plate 3 having
The midsole 2 includes an easy-compression region 20A provided in most of the middle foot portion 5M and most of the rear foot portion 5R,
An inner part 2M, a central part 2C, and an outer part that are arranged between the Chopard joint JS and the rear end of the rib BC and that divide the rear foot part 5R into three equal parts in the transverse direction X perpendicular to the long axis CL of the foot. A part of the center part 2L and at least a part of the center part 2C and / or a part of the outer part 2L, and a hard-compressing area 21A having a higher compression rigidity than a material forming the easy-compressing area 20A,
The plate 3 is arranged continuously in front of, under and behind the hardly compressible region 21A, and the lower surface of the plate 3 is attached to the upper surface of the outsole 1 in front of and behind the hardly compressible region 21A. .

In this case, it may be possible to expect the same effect as the one aspect. That is, the same effect may be obtained even when the easy compression region 20A and the difficult compression region 21A are formed by the plate 3 without providing a difference in hardness in the midsole 2, for example.

However, the provision of the low hardness region 20 and the high hardness region 21 in the midsole 2 makes it easier to assume the behavior of the plate 3, and a stable cushioning improvement and jump height improvement effect will be obtained.
In addition, also when the low hardness area | region 20 is made into the easy compression area | region 20A and the high hardness area | region 21 is made into the difficult compression area | region 21A, the following preferable examples and the combination of each example can be employ | adopted.

FIG. 1 is an outer side view of a shoe sole showing an embodiment of the present invention. In order to facilitate understanding of the invention, the skeleton of the foot is illustrated with phantom lines on the inside. FIG. 2 is a plan view of the midsole according to the embodiment. FIG. 3 is a bottom view of the midsole. FIG. 4 is a perspective view of the midsole as viewed obliquely from the rear. FIG. 5 is a perspective view of the midsole viewed from the back side. FIG. 6A is a process diagram showing a state immediately before jumping in a general athletic shoe, and FIG. 6B is a process diagram showing a state until just before jumping in an athletic shoe having a shoe sole of the embodiment. 7A and 7B are diagrams showing test results. FIG. 8 is an outer side view of a shoe sole showing another example.

Preferably, the high hardness region 21 is disposed between the Chopard joint JS and the inner protrusion BC2 of the rib protuberance BC1.
The low hardness region 20 is disposed at least in front of the Chopard joint JS and behind the inner projection BC2.

In this case, the high hardness region 21 is disposed in front of the inner protrusion BC2 of the rib bulge BC1, so that the compression amount of the low hardness region 20 is sufficiently large, and the plate 3 is likely to be curved.
Therefore, the jump height and cushioning can be further increased.

Preferably, the high hardness region 21 is disposed between the front end of the rib BC and the rear end of the rib BC,
The low hardness region 20 is disposed at least in front of the front end of the rib BC and behind the rear end of the rib BC.

In this case, the high hardness region 21 is disposed behind the front end of the rib BC, and the hard high hardness region 21 is unlikely to cause a feeling of strangeness on the sole.

Preferably, the high hardness region 21 is disposed between the front end of the rib BC and the inner protrusion BC2 of the rib protuberance BC1;
The low hardness region 20 is disposed at least in front of the front end of the rib BC and behind the inner projection BC2.

In this case, the compression amount of the low hardness region 20 at the time of the heel contact HC is sufficiently large, and the plate 3 is likely to be bent. Therefore, the jump height and cushioning can be further increased.
In addition, the high hardness region 21 is disposed behind the front end of the rib BC, so that the discomfort is unlikely to occur.

Preferably, the average value W1 of the first width from the outer end of the high hardness region 21 to the end opposite to the outer end is 17% of the total width W of the midsole 2 in the region crossing the high hardness region 21. It is set to ~ 100%.

If the first width W1 is smaller than 17% of the full width W, the jump height may not increase sufficiently. On the other hand, the first width W1 does not become larger than the full width W, and the maximum value of the first width W1 is 100% of the full width W.
However, when the hard high hardness region 21 is provided over the entire width of the midsole 2, a sense of incongruity may be felt during traveling.
For this reason, the high hardness region 21 is more preferably about 17% to 80% of the total width W, and most preferably about 30% to 67% of the total width W.

Preferably, the average value H1 of the first height of the high hardness region 21 is 25% to 150% of the average value H of the height of the entire width W of the midsole 2 at the portion where the high hardness region 21 is disposed. Is set.
If the average value H1 of the first height is less than 25% of the average value H of the height of the entire width of the midsole 2, the jump height may not increase sufficiently.
In addition, the rear foot portion 5R of the midsole 2 usually has a large winding portion, and when the high hardness region 21 is provided at a side of the winding portion, the height is about 150% of the average height H in the entire width. Might be.

Preferably, the average value of the bending stiffness at the time of dorsiflexion of the front portion 30 in front of the high hardness region 21 in the plate 3 is higher than that in the rear portion 31 in the plate 3 behind the high hardness region 21. large.

In this case, the average value of the bending rigidity of the rear portion 31 is smaller than that of the front portion 30, and the low hardness region 20 of the midsole 2 of the rear portion 31 will be easily compressed.
Further, in this case, the average value of the bending rigidity of the front portion 30 is larger than that of the rear portion 31, so that the front portion 30 of the plate 3 curved at the time of the heel contact HC can absorb a large amount of energy.
Therefore, in this case, a further increase in jump height can be expected.

Preferably, the width of the plate 3 is larger than the width of the high hardness region 21.

In this case, both good footsteps and sufficient jump height will improve. That is, as described above, the first width W1 of the high hardness region 21 is preferably relatively smaller than the full width W, while the width of the plate 3 acting like a leaf spring is larger than that of the high hardness region 21. preferable.

Preferably, the front end of the plate 3 is arranged behind the front end of the main ball O1.

If the plate 3 extends further forward than the front end of the main ball O1, the force of kicking in the vertical direction is reduced by preventing the bending of the MP joint, and the jump height may be reduced. For this reason, it is preferable that the front end of the plate 3 is set behind the first to fifth MP joints.

Preferably, the front end of the plate 3 is set behind the front end of the main ball O1 and in front of the bone bottom of the metatarsal bone B14 of the main ball B1.

In this case, the plate 3 is set at a position in front of the bone bottom of the metatarsal bone B14 of the main rib B1, and therefore, the curvature of the long front portion 30 of the plate 3 is large, and the jump height is further increased. An increase can be expected.
Note that the bone bottom refers to a portion of each bone that is slightly swollen at a portion close to the posterior joint, and is also called a proximal head.

Preferably, the rear end of the plate 3 is set at a position behind the inner protrusion BC2 of the rib bulge BC1.

In this case, it is easy to ensure a protruding amount by which the plate 3 protrudes rearward from the rear end of the high hardness region 21.

Preferably, the length L30 of the front portion 30 from the front end of the plate 3 to the front end of the high hardness region 21 is the length L31 of the rear portion 31 from the rear end of the plate 3 to the rear end of the high hardness region 21. Longer than.

In this case, the impulse at the time of the heel contact HC input from the short rear portion 31 is accumulated in the long front portion 30. Therefore, the function like a plate spring of the plate 3 is enhanced, and the energy absorption efficiency will be good.

Preferably, the hardness of the foam forming the high hardness region 21 is set to a value that is 5 ° to 20 ° larger in JISC hardness than the hardness of the foam forming the low hardness region 20.

If the hardness difference is less than 5 ° in JISC hardness, the jump height will not be improved sufficiently. On the other hand, if the hardness difference is larger than 20 °, the high hardness region 21 may be pushed up, or the hardness of the low hardness region 20 may be too small.
In general, the low hardness region 20 is preferably about 50 ° to 60 °. On the other hand, the high hardness region 21 is preferably about 60 ° to 75 °, and most preferably about 65 ° to 70 °.

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

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 5, the shoe sole is a shoe sole suitable for an indoor game such as a handball, and is disposed on the outsole 1 and an outsole 1 having a ground contact surface that contacts the road surface. A midsole 2 and a plate 3 are provided.

The midsole 2 is mainly composed of a foam, and is made of a material suitable for shock absorption such as a foam containing a resin component such as EVA (ethylene-vinyl acetate copolymer). On the other hand, the outsole 1 is formed of a material excellent in wear resistance such as a rubber foam or a non-foam.

As shown in FIG. 2, the midsole 2 includes a low hardness region 20 and a high hardness region 21. 1 to 5, the high hardness region 21 is provided with fine halftone dots, and the plate 3 is provided with rough halftone dots.

The foam of the midsole 2 in FIG. 1 includes a thermoplastic resin component and any appropriate other component. Examples of the thermoplastic resin component include thermoplastic elastomers and thermoplastic resins. It should be noted that a gel having a high impact absorption property may be embedded in the rear foot portion 5R of the midsole 2 or a known reinforcing device for reinforcing the middle foot portion 5M may be provided on the upper surface of the midsole 2.

On the midsole 2, an insole (inner bottom) (not shown) is inserted. A sock liner (insole) is inserted into the upper part above the insole.

The forefoot portion 5F, the middle foot portion 5M, and the rear foot portion 5R mean portions that cover the front foot, the middle foot, and the rear foot of the foot in FIG. 3, respectively.

As is well known, the forefoot consists of 5 metatarsals and 14 ribs. The midfoot consists of a scaphoid bone, a cubic bone and three wedge-shaped bones. The hind leg consists of the talus and rib BC.

As shown in FIG. 2, the low hardness region 20 is continuously provided in most of the forefoot portion 5F, most of the middle foot portion 5M, and most of the rear foot portion 5R. The hardness of the foam in the low hardness region 20 is preferably the hardness of a general midsole material, and is set to, for example, about 50 ° to 60 ° in terms of JISC hardness.

As shown in FIG. 1, the high hardness region 21 is disposed between the Chopard joint JS and the rear end of the rib BC, and preferably from the front end of the rib BC to the inner protrusion BC2 of the rib protuberance BC1. Arranged between. In this preferable case, the low hardness region 20 is disposed at least in front of the front end of the rib BC and behind the inner projection BC2.

The high hardness region 21 in FIG. 2 includes at least one of the central portion 2C of the inner portion 2M, the central portion 2C, and the outer portion 2L obtained by dividing the rear foot portion 5R into three equal parts in the transverse direction orthogonal to the long axis CL of the foot. Part and / or part of the outer part 2L, and in the case of the present embodiment, it is provided only on the outer side L of the long axis CL. In addition, the low hardness region 20 is provided in the inner side M just beside the high hardness region 21, and therefore the low hardness region 20 seems to have a shape or a hole partially cut away by the high hardness region 21. The middle foot portion 5M and the rear foot portion 5R are continuous.

The foam in the high hardness region 21 has a higher hardness than the foam forming the low hardness region 20. Preferably, the hardness of the foam that forms the high hardness region 21 is set to a value that is 5 ° to 20 ° larger in JISC hardness than the foam that forms the low hardness region 20, and more preferably 10 It is set to about -15 °. The hardness of the foam in the high hardness region 21 is set to, for example, 65 ° to 70 ° in terms of JISC hardness.

The average value W1 of the first width from the outer end of the high hardness region 21 to the end opposite to the outer end is 40% to 60% of the total width W of the midsole 2 in the region crossing the high hardness region 21. Is set to In addition, the high hardness area | region 21 does not need to extend just beside and may incline.

4 and 1, the average value H1 of the first height of the high hardness region 21 is 80% to 100% of the average value H of the entire width of the midsole 2 at the portion where the high hardness region 21 is disposed. % Is set.

As shown in FIG. 1, the plate 3 is located between the upper surface of the outsole 1 and the upper surface of the midsole 2 and continues from the middle foot portion 5M to the rear foot portion 5R. The plate 3 has a Young's modulus greater than the Young's modulus of the material of the outsole 1 and the midsole 2.

In the case of the present embodiment, the plate 3 is disposed between the upper surface of the outsole 1 and the lower surface of the midsole 2, but when the midsole 2 is formed in two upper and lower layers, the upper and lower midsole You may arrange | position in the position pinched | interposed between two.

As clearly shown in FIG. 3, the front end of the plate 3 is arranged behind the front end of the main ball O1 and in front of the bone bottom of the metatarsal bone B14 of the main ball B1. The plate 3 is arranged continuously in front of, under and behind the high hardness region 21 of FIG. The rear end of the plate 3 is set at a position behind the inner protrusion BC2 of the rib protrusion BC1 (FIG. 1).
The length L30 of the front portion 30 from the front end of the plate 3 to the front end of the high hardness region 21 is longer than the length L31 of the rear portion 31 from the rear end of the plate 3 to the rear end of the high hardness region 21. .

The width of the plate 3 in FIG. 3 is larger than the first width W1 of the high hardness region 21 and slightly smaller than the total width W of the midsole 2. The width of the plate 3 is preferably about 60% to 95% of the width of the midsole 2. When the width of the plate 3 is narrow, the plate 3 may be arranged so as to be offset from the outside of the midsole 2.

The average value of the bending stiffness at the time of dorsiflexion of the front portion 30 in front of the high hardness region 21 in the plate 3 is larger than that in the rear portion 31 behind the high hardness region 21 in the plate 3.

Even when the average value is not related, the spring effect will be obtained to some extent. Although the notch 32 at the rear end of the plate 3 may not be provided, the notch 32 makes it easy to realize the lower rigidity of the rear portion 31 of the plate 3 and the lower rigidity of the low hardness region 20.
The plate 3 may be provided with a vent hole.
Further, the rear end of the plate 3 may extend further to the rear than the rear end of the foot, such as a squash shoe.

Next, the result of verifying the effect of the athletic shoe having the sole of the present embodiment on the one-leg jump chute of the handball is shown.

For this verification, the handball shoes according to the examples of FIGS. On the other hand, a commercially available handball shoe was used as a comparative example. A handball player wears each of the above shoes and performs several jump shoots to measure the jump height to the highest point in FIG. 7A and the distance jumped forward until the highest point in FIG. 7B is reached.

As can be seen from FIG. 7A, Test ex. In this case, the jump height was about 15 mm (several percent) larger than that of the comparative example. Further, as can be seen from FIG. 7B, Test ex. In this case, the distance jumped forward was shorter by about 100 mm (10%) than the comparative example.

Further, when the impulse of the braking force from the heel contact HC to the foot flat FF in FIGS. 6B and 6A at the time of the jump chute was measured, Test ex. In this case, it was increased by about 10% as compared with the comparative example. Further, when the braking force at the heel rise at the time of the jump shot was measured, Test ex. In this case, it was reduced by several percent compared with the comparative example.

Further, the load at the time of the first strike at which the impact was greatest, that is, the load at the heel contact HC was measured. As a result, Test ex. In this case, the impact load was reduced by about 15% compared to the comparative example. Therefore, it can be seen that the structure of the sole is suitable not only for indoor competition but also for outdoor running and walking as exercise.

From these test results, it can be seen that the effect of the shoe sole of the present invention is more apparent.

Next, another embodiment will be described with reference to FIG.
In the present embodiment, an easily compressible region 20 </ b> A is provided instead of the low hardness region 20, while a hardly compressible region 21 </ b> A is provided instead of the high hardness region 21.

The easy compression region 20A in FIG. 8 is provided in most of the middle foot portion 5M and most of the rear foot portion 5R. On the other hand, the hard-compressing region 21A is arranged in the same region as that of the embodiment of FIG.

The plate 3 is arranged continuously from the front to the rear of the hardly compressible region 21A, and the lower surface of the plate 3 is attached to the upper surface of the outsole 1 at the front and rear of the hardly compressible region 21A.

In the case of the present embodiment, the hardly compressible region 21A may be formed by the protrusions of the plate 3, or a structure in which the outsole 1 enters the bent portion of the plate 3 may be employed.

Other configurations are the same as those of the embodiment of FIGS. 1 to 5, and the description thereof is omitted.

Next, modified examples of the high hardness region 21 and / or the hardly compressible region 21A in each embodiment will be described.

The high hardness region 21 in FIG. 4 has a substantially rectangular parallelepiped bank shape, but the high hardness region 21 may have a trapezoidal bank shape as in FIG. 8 or a cross section as in FIG. It may be a bank.

The high hardness region 21 in FIG. 1 is provided from the lower surface of the midsole 2 to the entire height of the upper surface, but may be provided in a part of the midsole 2 in the vertical direction. Moreover, when the high hardness area | region 21 is provided in a part in this way, the high hardness area | region 21 may be provided in the upper part of the midsole 2, the lower part, or a part of upper-lower intermediate part.

The planar shape of the high hardness region 21 in FIG. 2 does not have to be a rectangular shape, and may be a triangular shape, a wave shape, a trapezoidal shape, a square shape, or a combination of these.

For example, a plurality of square-shaped high hardness portions may be arranged apart from each other in the foot width direction, and one high hardness region 21 may be formed by the plurality of high hardness portions. In this case, the width of the high hardness region 21 should be recognized as the distance from the outer end of the outermost hard part of the outermost L to the inner end of the harder part of the innermost M.

When the high hardness region 21 has a triangular shape or a trapezoidal shape, for example, a shape in which the length in the foot length direction decreases from the outer portion 2L toward the central portion 2C may be used.

Alternatively, the high hardness region 21 may be formed so as to surround a part or all of the periphery of the low hardness portion in the high hardness portion.

Regarding the arrangement in the transverse direction X of the high hardness region 21, a part of the high hardness region 21 is provided in the upper part 22 of the outer side L of the midsole 2, but the high hardness region 21 is provided in the upper part 22 of the winding. It does not have to be done. Moreover, the high hardness area | region 21 may be provided only in the outer side part 2L or the center part 2C.

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, in order to suppress overpronation, a region having a hardness higher than the low hardness region 20 may be provided inside the midfoot portion 5M or the rear foot portion 5R of the midsole 2.
In addition, a region having a higher hardness than the low hardness region 20 may be provided on the forefoot portion 5F to the middle foot portion 5M of the midsole 2 to suppress lateral movement of the foot.
Moreover, the structure of this invention may be applied only to a shaft foot, and the structure of this invention may be applied to both feet.

Accordingly, such changes and modifications are to be construed as within the scope of the present invention.

The present invention can be applied not only to indoor shoes such as handball and basketball but also to athletic shoes such as outdoor running and walking.

1: Outsole
2: Midsole, 2C: Central part, 2L: Outer part, 2M: Inner part, 22: Winding upper part 20: Low hardness area, 20A: Easy compression area,
21: High hardness region, 21A: Hard compression region 3: Plate, 30: Front part, 31: Rear part 5F: Forefoot part, 5M: Middle foot part, 5R: Rear foot part BC: Rib, BC1: Rib protuberance, BC2: Inner protrusion CL: Long axis FF: Foot flat, HC: Heel contact H: Average value of full width height, H1: Average value of first height L: Outer side, M: Inner side O1: Main ball W: Full width , W1: 1st width

Claims

A shoe sole for athletic shoes,
An outsole 1 having a ground contact surface;
A midsole 2 disposed above the outsole 1;
Young that is located between the upper surface of the outsole 1 and the upper surface of the midsole 2 and that is continuous from the middle foot part 5M to the rear foot part 5R and is larger than the Young's modulus of the material of the outsole 1 and the midsole 2 A plate 3 made of a material having a rate,
The midsole 2 has a low hardness region 20 provided in most of the middle foot portion 5M and most of the rear foot portion 5R;
An inner part 2M, a central part 2C, and an outer part that are arranged between the Chopard joint JS and the rear end of the rib BC and that divide the rear foot part 5R into three equal parts in the transverse direction X perpendicular to the long axis CL of the foot. A high hardness region 21 provided in at least a part of the central part 2C and / or a part of the outer part 2L of the part 2L,
The hardness of the foam forming the high hardness region 21 is greater than that of the low hardness region 20,
The plate 3 is arranged continuously over the front, directly under and behind the high hardness region 21.
The shoe sole of claim 1,
The high hardness region 21 is disposed between the Chopard joint JS and the inner protrusion BC2 of the rib protrusion BC1.
The low hardness region 20 is disposed at least in front of the Chopard joint JS and behind the inner projection BC2.
The shoe sole of claim 1,
The high hardness region 21 is disposed between the front end of the rib BC and the rear end of the rib BC,
The low hardness region 20 is disposed at least in front of the front end of the rib BC and behind the rear end of the rib BC.
The shoe sole of claim 1,
The high hardness region 21 is disposed between the front end of the rib BC and the inner protrusion BC2 of the rib protrusion BC1,
The low hardness region 20 is disposed at least in front of the front end of the rib BC and behind the inner projection BC2.
The shoe sole according to any one of claims 1 to 4,
The average value W1 of the first width from the outer end of the high hardness region 21 to the end opposite to the outer end is 17% to 100% of the total width W of the midsole 2 at the portion crossing the high hardness region 21. Is set to
The shoe sole according to any one of claims 1 to 5,
The average value H1 of the first height of the high hardness region 21 is set to 25% to 150% of the average value H of the height of the entire width W of the midsole 2 at the portion where the high hardness region 21 is disposed. .
The shoe sole according to any one of claims 1 to 6,
The average value of the bending stiffness at the time of dorsiflexion of the front portion 30 in front of the high hardness region 21 in the plate 3 is larger than that in the rear portion 31 behind the high hardness region 21 in the plate 3.
The shoe sole according to any one of claims 1 to 7,
The width of the plate 3 is larger than the width of the high hardness region 21.
The shoe sole according to any one of claims 1 to 8,
The front end of the plate 3 is arranged behind the front end of the main ball O1.
The shoe sole according to any one of claims 1 to 8,
The front end of the plate 3 is set behind the front end of the main ball O1 and in front of the bone bottom of the metatarsal bone B14 of the main ball B1.
The shoe sole according to any one of claims 1 to 10,
The rear end of the plate 3 is set at a position rearward of the inner protrusion BC2 of the rib protrusion BC1.
The shoe sole according to any one of claims 1 to 11,
The length L30 of the front portion 30 from the front end of the plate 3 to the front end of the high hardness region 21 is longer than the length L31 of the rear portion 31 from the rear end of the plate 3 to the rear end of the high hardness region 21. .
The shoe sole according to any one of claims 1 to 12,
The hardness of the foam that forms the high hardness region 21 is set to a value that is 5 ° to 20 ° larger in JISC hardness than the hardness of the foam that forms the low hardness region 20.
The shoe sole according to any one of claims 1 to 13,
The low hardness region 20 is disposed in front of the front end of the high hardness region 21 and behind the rear end, respectively.
A shoe sole for athletic shoes,
An outsole 1 having a ground contact surface;
A midsole 2 disposed above the outsole 1;
A Young's modulus greater than the Young's modulus of the outsole 1 and the midsole 2 at a position between the upper surface of the outsole 1 and the upper surface of the midsole 2 and connected from the middle foot 5M to the rear foot 5R. A plate 3 having
The midsole 2 includes an easy-compression region 20A provided in most of the middle foot portion 5M and most of the rear foot portion 5R,
An inner part 2M, a central part 2C, and an outer part that are arranged between the Chopard joint JS and the rear end of the rib BC and that divide the rear foot part 5R into three equal parts in the transverse direction X perpendicular to the long axis CL of the foot. A part of the center part 2L and at least a part of the center part 2C and / or a part of the outer part 2L, and a hard-compressing area 21A having a higher compression rigidity than a material forming the easy-compressing area 20A,
The plate 3 is arranged continuously and directly below and behind the hardly-compressed region 21A, and the lower surface of the plate 3 is attached to the upper surface of the outsole 1 at the front and rear of the hardly-compressed region 21A.