WO2017013702A1

WO2017013702A1 - Shoe sole suitable for walking

Info

Publication number: WO2017013702A1
Application number: PCT/JP2015/070505
Authority: WO
Inventors: 将市川; 靖之高田; 雅俊西川
Original assignee: 株式会社アシックス
Priority date: 2015-07-17
Filing date: 2015-07-17
Publication date: 2017-01-26
Also published as: JP5923224B1; JPWO2017013702A1

Abstract

This shoe sole defines a front longitudinal groove that extends at least longitudinally between an inner side and an outer side of a front foot portion, and a first flex groove that is disposed forward of the hallux ball of the front foot portion and that extends at least transversely so as to intersect with the front longitudinal groove at an imaginary first point of intersection. A second angle between an outer flex portion of the first flex groove and the front longitudinal groove is larger than a first angle between an inner flex portion of the first flex groove and the front longitudinal groove.

Description

Shoe sole suitable for walking

The present invention relates to a shoe sole suitable for walking, for example, elderly people with low muscular strength.

In shoes with forward movement such as running and walking, a shoe sole provided with a bending groove corresponding to the joint of the foot is common in order to realize the original movement of the foot. In recent years, in order to improve running efficiency, a shoe sole provided with a longitudinal groove extending in the longitudinal direction of the shoe has been developed.

WO2010 / 038266A1 (front page) JP2008 / 29717A (front page) JP2009 / 240827A (front page)

The invention disclosed in Patent Document 1 aims at a shoe sole with good running efficiency, and does not consider the stability of walking of elderly people.

The shoe sole disclosed in Patent Document 2 has a plurality of bent grooves extending obliquely rearward from the inner side of the foot to the outer side of the foot along the arrangement of the MP joints of the first to fifth heels from the forefoot to the toes. It is arranged in the same direction up to the part. These multiple bends will dominate how the pedestrian's toe joint bends.

The invention of Patent Document 2 aims to improve the walking stability of elderly people and infants. However, the invention of the same document has not been sufficiently studied on the walking mechanism of the elderly.

The invention disclosed in Patent Document 3 aims to selectively change the degree of expansion and contraction in a specific portion of the upper. A large number of notches for separating the shoe sole in the front-rear direction are formed in almost the entire region of the shoe sole of the invention.

However, it would be difficult to improve the stability of walking of elderly people and the like in the shoe sole of the document 3. For example, the multiple incisions formed throughout the sole will result in unstable deformation of the sole.

Therefore, an object of the present invention is to provide a shoe sole in which elderly people with reduced muscle strength can improve the stability performance during walking.

Next, the walking mechanism of elderly people and the like will be described.
During walking, a single leg support period in which the weight is supported by only one leg and a both leg support period in which the weight is supported by both legs appear alternately.

FIG. 11 shows the arrangement of the shoe sole during the both-leg support period. As shown in this figure, the front and rear legs are grounded while being slightly opened from side to side. As shown by the dot pattern in FIG. 11, only the rear end S10 of the front shoe sole S1 is grounded, while only the front end S20 of the rear shoe sole S2 is grounded.

The present inventor has found that the step SD of both legs and the walking angle θ tend to be larger in the case of elderly people than in young people. The reason for this is considered that the elderly lose their muscular strength and balance ability with aging, and compensate for these decreases by increasing the step SD and the walking angle θ.

Next, the results of research on the timing of walking when the walking becomes unstable will be described.

The ground reaction force F of the pedestrian shown in FIG. 12 (b) was measured for the left / right x component Fx and the up / down z component Fz in FIG. The value of the inclination angle １ for one cycle of walking is shown in FIG. In FIG. 12 (c), it can be understood that the swing width W 傾斜 of the tilt angle heel is maximized in the both-leg support period TE with the dot pattern.

In other words, it is presumed that when walking on both legs in walking motion, the force tends to blur to the left and right, and it is in an unstable state. Therefore, in order to perform stable grounding in the both-leg support period TE, it is considered important to reduce the swing width WФ of the inclination angle Ф.

On the other hand, in the both-leg supporting period TE, as shown in FIG. 11, the rear end S10 of the leading leg sole S1 and the front end S20 of the succeeding leg sole S2 are grounded, and the other parts are not grounded. . Therefore, it is important to obtain a stable grounding state of the rear end S10 and the front end S20.

On the other hand, according to research by the present inventors, it is considered that, unlike young people with strong muscle strength, elderly people have a small height of so-called rolling motion (tilting exercise) and heel rise when walking. Further, when attention is paid to the front end S20 of the shoe sole S2 of the succeeding leg, since the step SD is large, it is presumed that the center of pressure will move to the inner side M after the ground contact until the ground is released. During this movement, the small ball will not be pressured.

Therefore, it is estimated that the line S21 at the rear end of the front end S20 of the shoe sole S2 of the succeeding leg in the both-leg support period TE (FIG. 11) will be convex toward the rear DB as shown in FIG. Further, since the walking angle θ is large, it is estimated that the rear end line S21 will extend obliquely forward from the inner side M to the outer side L of the foot. Further, when the angles α1 and β1 formed by the line S21 with the center SC are compared, it is estimated that β1> α1.

Consider the leading leg in the both-leg supporting period TE (FIG. 11). Since the rolling motion is small, it is presumed that the line S11 at the front end of the rear end S10 of the shoe sole S1 will approach a direction orthogonal to the traveling direction. Therefore, it is presumed that the line S11 will extend diagonally forward DF from the inner side M of the foot toward the outer side L with respect to the center SC.

Next, a common configuration in various aspects of the present invention will be described.
The present invention is a shoe sole, wherein the shoe sole includes a front longitudinal groove G0 extending at least in the longitudinal direction Y at a central portion 1C between the inner side M and the outer side L of the front foot portion 3, and a mother of the front foot portion. A first bent groove G1 which is disposed in front DF from the Ryukyu O1 and extends in at least the lateral direction X so as to intersect the front longitudinal groove G0 at a virtual first intersection C1;
The first bent groove G1 extends from the central portion 1C toward the inner edge 11 to the inner bent portion G11, and extends obliquely forward from the central portion 1C toward the outer edge 10. And an outer bent portion G10.
The second angle β formed by the outer bent portion G10 and the front vertical groove G0 is larger than the first angle α formed by the inner bent portion G11 and the front vertical groove G0.

In the present invention, a front longitudinal groove G0 extending in the longitudinal direction is provided in the central portion 1C. As a result, in the one leg support period, the pressure center point is easily gathered stably in the vicinity of the shoe center in the forefoot part, and a transition from a stable grounding state to the next both leg support period TE can be expected.

In the present invention, the first bending groove G1 disposed in front of the main ball O1 has an inner bending portion G11 extending from the central portion 1C toward the inner edge 11 rightward or obliquely rearward, and the central portion. And an outer bent portion G10 extending obliquely forward from the portion 1C toward the outer edge 10. Thereby, even when the locus of the pressure center point of the toe portion moves inward during the both-leg support period TE, stable toe grounding will be possible.

In this specification, the virtual first intersection C1 (second intersection C2) means that such an intersection cannot actually be seen with eyes.
Further, “so as to intersect at the intersection” means that the grooves do not have to actually intersect. For example, it means that the front longitudinal groove G0 is close to about 2 to 3 mm and does not intersect with the first bent groove G1.

The second angle β formed by the outer bent portion G10 and the front vertical groove G0 is larger than the first angle α formed by the inner bent portion G11 and the front vertical groove G0. Therefore, the first bending groove G1 extending obliquely forward on the outside will make it easier to move the trajectory of the pressure center point of the toe portion inward during the both-leg support period TE when the step distance between the left and right feet is large. Thereby, stable toe grounding can be expected.

In the present invention, the front longitudinal groove G0 and the first bent groove G1 can be specified by various definitions as will be described later.

FIG. 1 is a bottom view of a shoe sole showing Example 1 of the present invention. In FIG. 1, a dot pattern is given to the main groove portion. FIG. 2 is a schematic perspective view of the shoe sole. In FIG. 2 and FIG. 8 to be described later, for convenience of drawing, the illustration of a thin groove formed on the grounding surface of the outsole is omitted. In FIGS. 2 and 8, a dot pattern is attached to the part of the outsole. FIG. 3 is a schematic bottom view showing the sole with the foot skeleton. FIG. 4 is a schematic bottom view of the shoe sole. In FIG. 3 and FIG. 4, the illustration of thin grooves formed on the ground contact surface of the outsole is omitted in order to make the drawings easy to see. 5A, FIG. 5B, FIG. 5C, FIG. 5D, FIG. 5E and FIG. 5F are partial cross-sectional views of the shoe sole taken along the cross-sectional lines A, B, C, D, E, and F shown in FIG. . FIG. 6 is a bottom view of a shoe sole showing Example 2 of the present invention. In FIG. 7 and FIG. 9 described later, a dot pattern is given to the main groove portion. FIG. 7 is a bottom view of a shoe sole showing Example 3 of the present invention. FIG. 8 is a schematic perspective view of the shoe sole. FIG. 9 is a bottom view of a shoe sole showing Example 4 of the present invention. FIG. 10 is a schematic side view of a shoe showing Example 5 of the present invention. FIG. 11 is a conceptual diagram showing the arrangement of left and right shoe soles in the both-leg support period TE. In FIG. 11, a dot pattern is attached to the ground contact portion. FIG. 12 is a graph showing the slope of ground reaction force in one cycle of walking. FIG. 13 is a graph showing the results of measuring the stability of the test samples T1 to T4. FIG. 14 is a graph showing the results of measuring the stability of the test samples T5 to T7. FIG. 15A and FIG. 15B are bottom views of toe portions of shoe soles according to Examples 6 and 7, respectively. 16A and 16B are bottom views of a toe portion of a shoe sole showing Examples 8 and 9, respectively. In FIGS. 15A to 16B, a dot pattern is attached to the main groove portion.

The front longitudinal groove G0 and the first bent groove G1 of the present invention are defined as follows in the first aspect. That is, in the first aspect,
The average depth H0 of the front longitudinal groove G0 in the range from the first intersection C1 to 5 cm behind is set to 3 to 20 mm,
The average depth H1 of the first bent groove G1 is set to 3 to 12 mm.
“Average depth” means an average value obtained by averaging the depth of the deepest portion in an arbitrary cross section of the groove in the direction in which the groove extends.

A load is applied to the front longitudinal groove G0, the shoe sole bends, and the shoe sole sinks downward. As a result, the pressure center is easily moved along the front longitudinal groove G0. In view of the function of the front longitudinal groove G0, the average depth H0 of the front longitudinal groove G0 is preferably about 4 to 20 mm, and most preferably about 5 to 15 mm.

The shoe sole bends along the bend of the foot at the first bend groove G1. If the first bending groove G1 is shallow, the shoe sole is difficult to bend. From this point of view, the depth H1 of the first bent groove G1 is preferably about 3.5 to 12 mm, and most preferably about 4 to 10 mm.

The front longitudinal groove G0 and the first bent groove G1 of the present invention are defined as follows in the second aspect. That is, in the second aspect,
The average value of the cross-sectional area of the front longitudinal groove G0 in the range from the first intersection C1 to 5 cm rear DB is set to 10 to 200 square millimeters,
The average value of the cross-sectional area of the first bent groove G1 is set to 10 to 120 square millimeters.
The “average value of the cross-sectional area” means an average value obtained by averaging the cross-sectional areas in an arbitrary cross section of the groove in the extending direction of the groove.

In order to bend the sole in the groove, the groove needs to have a sufficient depth. However, in order to obtain a stable walking posture by smoothly bending the shoe sole, it is preferable that the width of the groove is sufficiently large.

From this point of view, the average value of the cross-sectional area of the front longitudinal groove G0 is preferably set to 15 to 200 square millimeters, more preferably 20 to 200 square millimeters, and most preferably 25 to 200 square millimeters. Is done.

From the same viewpoint, the average value of the cross-sectional area of the first bent groove G1 is preferably about 20 to 120 square millimeters, and most preferably 25 to 100 square millimeters.

The front longitudinal groove G0 and the first bent groove G1 of the present invention are defined as follows in the third aspect. That is, in the third aspect,
The average depth H0 of the front longitudinal groove G0 in the range from the first intersection C1 to 5 cm behind is set to 3 to 20 mm,
The average value of the cross-sectional area of the front longitudinal groove G0 in the range from the first intersection C1 to 5 cm behind is set to 25 to 200 square millimeters,
The average depth H1 of the first bent groove G1 is set to 3 to 12 mm,
The average value of the cross-sectional area of the first bent groove G1 is set to 10 to 120 square millimeters.

In the third aspect, the grooves G0 and G1 are defined by both the average depths H0 and H1 and the average values of the cross-sectional areas, respectively. Therefore, the shoe sole is more easily bent in both the grooves.

In the fourth and fifth aspects of the present invention, in addition to the grooves G0 and G1,
One or more vertical fine grooves G7 extending in at least the vertical direction Y in the forefoot portion 3 and different from the front vertical groove G0;
The shoe sole defines one or a plurality of lateral grooves G6 that extend in the lateral direction intersecting the longitudinal direction Y in the forefoot portion 3 and are different from the first bent groove G1.

The front longitudinal groove G0 and the first bent groove G1 of the present invention are defined as follows in the fourth aspect. That is, in the fourth aspect,
The average depth H0 of the front longitudinal groove G0 in the range from the first intersection C1 to the rear of 5 cm is greater than the average depth of each of the one or more vertical grooves G7,
The average depth of the first bent groove G1 is larger than the average depth of each of the one or more lateral grooves G6.

The vertical ground groove G7 and the lateral groove G6 for preventing slipping in the horizontal direction and the vertical direction may be provided on the ground contact surface and the bottom surface of the shoe sole. In the fourth aspect, the depth of the front longitudinal groove G0 and the first bent groove G1 is greater than the depth of the anti-slip grooves G7 and G6. For this reason, the shoe sole is most easily bent in the deep front longitudinal groove G0 and the first bent groove G1, and therefore, the expected stability performance is likely to be exhibited.

The front longitudinal groove G0 and the first bent groove G1 of the present invention are defined as follows in the fifth aspect. That is, in the fifth aspect,
The average value of the cross-sectional area of the front longitudinal groove G0 in the range from the first intersection C1 to the rear of 5 cm is larger than the average value of the cross-sectional areas of the one or more vertical fine grooves G7,
The average value of the cross-sectional area of the first bent groove G1 is larger than the average value of the cross-sectional areas of the one or more horizontal grooves G6.

In the fifth aspect, the front longitudinal groove G0 and the first bent groove G1 are larger than the average value of the cross-sectional areas of the anti-slip grooves G7 and G6. Therefore, the shoe sole is most easily bent in the front longitudinal groove G0 and the first bent groove G1 having a large cross-sectional area, and therefore, the expected stability performance is likely to be exhibited.

In the second to fifth aspects, the average depths H0 and H1 of the front longitudinal groove G0 and the first bent groove G1 may be the values set in the first aspect described above.

On the other hand, in the first aspect and the third to fifth aspects, the average values of the cross sectional areas of the front longitudinal groove G0 and the first bent groove G1 may be the values set in the second aspect described above. Good.

Preferably in each of the above aspects, the front longitudinal groove G0 is formed by both the outsole 2 and the midsole 1,
The first bent groove G1 is formed by both the outsole 2 and the midsole 1.

In these cases, the front longitudinal groove G0 and the first bent groove G1 are formed not only in the outsole but also in the midsole, so that the shoe sole will be bent easily.

Preferably in each of the above aspects, the shoe sole further defines an auxiliary bending groove G3 extending obliquely rearward from the front longitudinal groove G0 toward the outer edge 10 in the rear DB with respect to the outer bending part G10,
The average depth H3 of the auxiliary bending groove G3 in the range from the outer edge 10 to the front longitudinal groove G0 is the same as the average depth H1 of the first bending groove G1, or the first bending groove It is smaller than the average depth H1 of G1.

Preferably, in each aspect, the shoe sole further defines an auxiliary bending groove G3 extending obliquely rearward from the front longitudinal groove G0 toward the outer edge 10 behind the outer bending part G10.
The average value of the cross-sectional area of the auxiliary bending groove G3 in the range from the outer edge 10 to the front longitudinal groove G0 is the same as the average value of the cross-sectional area of the first bending groove G1, or the first It is smaller than the average value of the bending groove G1.

In these cases, the auxiliary bending groove G3 disposed rearward of the outer bending portion G10 extends obliquely rearward from the front longitudinal groove G0 toward the outer edge 10, and the MP joints of the third to fourth footpads. Easy to follow the arrangement. Therefore, the shoe sole will be easily bent along the bending of the MP joint.

On the other hand, if the auxiliary bending groove G3 is more easily bent than the first bending groove G1, the bending of the shoe sole along the MP joint becomes dominant. In this case, the auxiliary bending groove G3 may hinder intended bending in the first bending groove G1. From this viewpoint, it is more preferable that the depth H3 of the auxiliary bending groove G3 is smaller than the depth H1 of the first bending groove G1. Similarly, it is more preferable that the average value of the cross-sectional area of the auxiliary bending groove G3 is smaller than the average value of the cross-sectional area of the first bending groove G1.

From this point of view, the depth H3 of the auxiliary bending groove G3 is preferably about 2 to 8 mm, and most preferably about 2.5 to 6 mm.

From the same viewpoint, the average value of the cross-sectional area of the auxiliary bending groove G3 is preferably set to 10 to 100 square millimeters, and most preferably set to 12 to 80 square millimeters.

When the auxiliary bending groove G3 is provided, the shoe sole region 30 surrounded by the front longitudinal groove G0, the first bending groove G1, the auxiliary bending groove G3, and the outer edge 10 has a triangular shape and a trapezoidal shape. In many cases, it is formed in a fan shape.

For the reasons described above, in the first to third aspects, preferably, the average depth H1 of the first bent groove G1 is larger than the average depth H6 of each of the one or more lateral grooves G6.
Similarly, in the first to third aspects, preferably, the average value of the cross-sectional areas of the first bent grooves G1 is larger than the average value of the cross-sectional areas of the one or more horizontal grooves G6.

In each of the above aspects, preferably, the shoe sole is disposed in the rear longitudinal groove G5 extending in at least the longitudinal direction Y between the inner side M and the outer side L of the rear foot part 5, and the rear foot part 5 A second bent groove G2 extending at least in the lateral direction X so as to intersect the rear longitudinal groove G5 at the virtual second intersection point C2,
The second bent groove G2 extends obliquely forward from the inner edge 11 toward the outer edge 10.

As discussed above with respect to the leading leg, the rear end portion of the shoe sole with the toe facing outward is inclined obliquely with respect to the shoe center SC during the both-leg support period TE. Therefore, the second bending groove G2 extending obliquely forward from the inner edge 11 toward the outer edge 10 is easy to bend when the leading leg is heel-grounded, and will be useful for stable grounding of the rear end portion.

On the other hand, in order to stabilize the posture of the wearer during the transition from the both-leg support period TE to the one-leg support period, the center of pressure should move forward while being positioned at the center inside and outside the rear foot. . The rear longitudinal groove G5 arranged between the inner side M and the outer side L will help to move forward while the center of pressure is located at the center of the inside and outside of the rear foot.

In this case, the rear longitudinal groove G5 and the second bent groove G2 are defined by an average depth and / or an average value of the cross-sectional area for the same reason as described above.

Preferably, the average depth H5 of the rear longitudinal groove G5 in the range from the second intersection C2 to the front of 5 cm is set to 3 to 16 mm, more preferably 5 to 16 mm. On the other hand, the average depth H2 of the second bent groove G2 is preferably set to 1 to 12 mm, more preferably set to 2 to 12 mm, and most preferably set to 3 to 12 mm.

Preferably, the average value of the cross sectional area of the rear longitudinal groove G5 in the range from the second intersection C2 to the front of 5 cm is set to 25 to 600 square millimeters, and more preferably 30 to 600 square millimeters. On the other hand, the average value of the cross-sectional area of the second bent groove G2 is preferably set to 5 to 120 square millimeters, and more preferably 8 to 100 square millimeters.

In this specification, it is extending at least in the longitudinal direction Y in the central portion 1C between the inner side M and the outer side L of the forefoot portion 3 (rear foot portion 5). The center of the front longitudinal groove G0 or the rear longitudinal groove G5 It means that the line does not pass through the part close to the inner and outer edges but passes through the inner and outer central part 1C.
Preferably, the central portion 1C is a central ３ portion obtained by dividing the shoe sole into three equal parts in the lateral direction, and the center line of the longitudinal groove G0 or the rear longitudinal groove G5 is disposed in the central portion 1C.

Preferably, the first bent groove G1 is formed to be convex toward the rear DB, so that the first bent groove G1 will be bent along the toe grounding of the succeeding leg in the both-leg supporting period TE.
Therefore, stable toe grounding can be expected.

More preferably, the first bent groove G1 is formed in an arc shape.
In this case, the bending of the shoe sole will be smooth due to the arc-shaped first bending groove G1.

Preferably, the front longitudinal groove G0 and the first bent groove G1 are formed at least on the ground contact surface side of the shoe sole.
The first bent groove G1 provided on the ground contact surface side may be easily bent compared to the case where the first bent groove G1 is provided on the upper surface of the shoe sole.

Preferably, the region 30 between the outer bent portion G10 and the auxiliary bent groove G3 on the upper surface opposite to the ground contact surface, and / or the region 32 in front of the outer bent portion G10 on the upper surface. , An upper groove G8 extending obliquely forward along the outer bent portion G10 is provided.
In this case, the shoe sole will be more easily bent by the upper groove G8 and bend smoothly.

Features described and / or illustrated in connection with one such embodiment or each of the following examples may be in the same or similar form in one or more other embodiments or other examples, and / or It can be utilized in combination with or instead of the features of other embodiments or examples.

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 drawings 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.

A first embodiment of the present invention will be described below with reference to FIGS.
This embodiment is, for example, a shoe sole for walking shoes.
A main sole MS shown in FIGS. 1 and 2 includes a rubber outsole 2 and a resin midsole 1. On the main sole MS, an upper that wraps the instep of the foot (not shown) is provided.

The midsole 1 includes a midsole body made of a resin foam such as EVA, and may further include a reinforcing device. “Made of resin” means that it has a resin component such as thermoplasticity, and includes any appropriate other component.

The outsole 2 in FIG. 2 is a grounded bottom that has higher wear resistance than the foam of the midsole body, and generally has a higher hardness than the foam of the midsole body. The term “made of rubber” means that it has components of natural rubber and synthetic rubber, and includes any other component.

In FIG. 3, the midsole 1 and the insole (not shown) of this embodiment cover almost the entire sole. On the other hand, as shown in FIGS. 1 and 2, the outsole 2 is attached to the lower surface of the midsole 1 and partially covers the sole.

As clearly shown in FIGS. 1 and 2, a front longitudinal groove G0, a first bending groove G1, a second bending groove G2, an auxiliary bending groove G3, and a rear longitudinal groove G5 are formed on the ground contact surface side of the main sole MS. ing.

In FIG. 3, the vertical groove G <b> 0 extends at least in the vertical direction Y between the inner side M and the outer side L of the forefoot part 3. The first bent groove G1 is disposed in front DF of the front ball O1 of the forefoot, and extends at least in the lateral direction X so as to intersect the front longitudinal groove G0 of FIG. 4 at a virtual first intersection C1. . In the present embodiment, the front longitudinal groove G0 and the first bent groove G1 actually intersect (cross) at the first intersection C1.

In FIG. 4, the first bent groove G1 includes an inner bent portion G11 and an outer bent portion G10. The inner bent portion G11 extends laterally or obliquely rearward from the first intersection C1 toward the inner edge 11. The outer bent portion G10 extends obliquely forward from the first intersection C1 toward the outer edge 10. For example, as shown in FIG. 3, the inner bent portion G11 is disposed in front of the main ball O1 and rearward of the rear end of the distal phalanx B1 of the first heel. On the other hand, the outer side bending part G10 is arrange | positioned ahead rather than the front-end | tip of the distal phalange B5 of the 5th rib.

In FIG. 3, the auxiliary bending groove G3 extends obliquely rearward from the front longitudinal groove G0 toward the outer edge 10 in the rear DB with respect to the outer bending part G10. Another auxiliary bending groove G4 extends from the front longitudinal groove G0 toward the inner edge 11 behind the inner bending part G11. Each of the auxiliary bending grooves G3 and G4 may be disposed along the five metatarsal joints MP of the footpad and in the posterior DB with respect to the joints MP of the midfoot toes.

In FIG. 2, the outsole 2 includes a plurality of parts separated from each other. Each of the grooves G0 to G5 is formed by a gap between parts of the outsole 2. Further, the front longitudinal groove G0, the first bending groove G1, the auxiliary bending groove G3, and the rear longitudinal groove G5 constitute deep grooves by grooving the bottom surface of the midsole 1 exposed between the parts.

In FIG. 4, the first bent groove G1 is formed to be convex toward the rear DB, and is curved, for example, in an arc shape. The front longitudinal groove G 0 is curved along the outer edge 10 of the midsole 1. The region 30 of the shoe sole surrounded by the front longitudinal groove G0, the first bending groove G1, the auxiliary bending groove G3, and the outer edge 10 is triangular as shown in FIG. 4, FIG. 6, FIG. It may be formed in a shape, trapezoidal shape or fan shape.

In FIG. 4, the first angle α formed by the inner bent portion G11 and the front vertical groove G0 is smaller than the second angle β formed by the outer bent portion G10 and the front vertical groove G0. When the first bending groove G1 is curved, the sizes of the first and second angles α and β may be calculated by the following method (1) or (2), for example.

(1) A tangent at each point separated from the first intersection C1 by an arbitrary distance on the center lines L10 and L11 of the bent portions G10 and 11, and the same from the first intersection C1 on the center line L0 of the front longitudinal groove G0. The average value of the angle formed by the tangent at each point separated by a distance is defined as the first or second angle α, β.
(2) The tangent line at the point where the center lines L10, L11 of the bent portions G10, 11 are equally divided into two in the length direction and the first intersection C1 on the center line L0 of the front longitudinal groove G0. The angle formed by the tangent at the point separated by the length of the line segment is defined as the first or second angle α, β.

In the range from the first intersection C1 in FIG. 4 to the back of 5 cm, the average depth H0 of the front longitudinal groove G0 in FIGS. 5A and 5C is set to about 5 to 15 mm. The average depth H1 of the first bent groove G1 in FIGS. 5B and 5D is set to about 4 to 10 mm.

The average depth H3 of the auxiliary bending groove G3 in FIG. 5E is set to about 2.5 to 6 mm. The average depth H3 of the auxiliary bending groove G3 in the range from the outer edge 10 to the front longitudinal groove G0 is smaller than the average depth H1 of the first bending groove G1. The depth H3 may be the same as the average depth H1 of the first bent groove G1.

In FIG. 1, the outsole 2 further includes a plurality of lateral grooves G6 extending in the lateral direction intersecting the longitudinal direction Y in the forefoot portion 3 and different from the first bent groove G1. The average depth H1 of the first bent groove G1 in FIG. 5D is larger than the average depth H6 of each of the lateral grooves G6.

The rear longitudinal groove G5 of FIG. 4 extends at least in the longitudinal direction Y between the inner side M and the outer side L of the rear foot part 5. The second bent groove G2 is disposed in the rear foot part 5 and extends at least in the lateral direction X so as to intersect the rear vertical groove G5 at the virtual second intersection point C2. In the case of the present embodiment, the rear longitudinal groove G5 and the front longitudinal groove G0 actually intersect at the second intersection C2.
The second bent groove G2 extends obliquely forward from the inner edge 11 toward the outer edge 10.

In FIG. 4, the center line L5 of the rear longitudinal groove G5 and the center line L0 of the front longitudinal groove G0 are arranged in the central portion 1C obtained by dividing the main sole MS into the inner M, the outer L and the central portion. Yes. More preferably, the main sole MS is disposed in a central portion 1C obtained by dividing the main sole MS into five equal parts in the width direction X.

In the range from the second intersection C2 in FIG. 4 to the front of 5 cm, the average depth H5 of the rear longitudinal groove G5 in FIG. 5A is set to 3 to 16 mm. The average depth H2 of the second bent groove G2 in FIG. 5F is set to 1 to 12 mm.

The average depth H0 of the front vertical groove G0 in FIG. 5C is larger than the average depth H7 of each of the plurality of vertical thin grooves G7. Further, the average depth H1 of the first bent groove G1 in FIG. 5D is larger than the average depth H6 of each of the plurality of lateral grooves G6.

As shown in FIGS. 2 and 1, the outsole 2 is not disposed on the outer peripheral edge of the midsole 1. Therefore, as shown in FIG. 2, there is almost no height difference on the bottom surface at the outer edge 10 and the inner edge 11 of the midsole 1. Therefore, it should be recognized that the first bent groove G1, the second bent groove G2, and the auxiliary bent grooves G3, G4 are not formed on the outer edge 10 and the inner edge 11 of the main sole MS. In other words, each of the bent grooves G1 to G4 only needs to be provided between the central portion 1C and the side edges 10 and 11, and need not be provided over the entire width between the side edges 10 and 11.

For this reason, the average values such as the average depths H1 to H4 (FIGS. 5A to 5E) of the grooves are the depths in the range excluding the outer edge 10 and the inner edge 11 in FIG. Mean value. In addition, the average depths H1 to H6 in FIGS. 5A to 5E mean the average value of the depth of the deepest portion in the cross section of each groove.

The average value of the cross-sectional area of the front longitudinal groove G0 in FIGS. 5A and 5C in the range from the first intersection C1 to 5 cm rear DB in FIG. 4 is set to about 25 to 200 square millimeters. The average value of the cross-sectional area of the first bent groove G1 in FIGS. 5B and 5D is set to about 20 to 100 square millimeters.

The average value of the cross-sectional area of the auxiliary bending groove G3 in FIG. 5E is set to about 12 to 80 square millimeters. The average value of the cross sectional area of the auxiliary bending groove G3 in the range from the vicinity of the outer edge 10 to the front longitudinal groove G0 is smaller than the average value of the first bending groove G1. The average value of the cross sectional area of the auxiliary bending groove G3 may be the same as that of the first bending groove G1.

The average value of the cross-sectional areas of the first bent grooves G1 in FIG. 5D is larger than the average value of the cross-sectional areas of the one or more horizontal grooves G6.

The average cross-sectional area of the rear longitudinal groove G5 in FIG. 5A in the range from the second intersection C2 in FIG. 4 to 5 cm forward is set to about 30 to 600 square millimeters. The average value of the cross-sectional area of the second bent groove G2 in FIG. 5F is set to about 8 to 10 square millimeters.

The average value of the cross-sectional area of the front vertical groove G0 in FIG. 5C is larger than the average value of the cross-sectional areas of the plurality of vertical fine grooves G7. Moreover, the average value of the cross-sectional area of the first bent groove G1 in FIG. 5D is larger than the average value of the cross-sectional areas of the plurality of horizontal grooves G6.

An upper groove G8 indicated by a broken line is formed on the upper surface of the main sole MS in FIG. The upper groove G8 extends along the outer bent portion G10 in the region 30 between the outer bent portion G10 on the upper surface and the auxiliary bent groove G3 and in the region 32 in front of the outer bent portion G10 on the upper surface. It extends diagonally forward.

As shown in FIG. 2, in the first embodiment, the front longitudinal groove G0 and the rear longitudinal groove G5 are connected to each other via the reinforcing portion 20 formed by the outsole 2. The reinforcing portion 20 defines a shallow groove of about 1 to 5 mm, for example.

As shown in the example of FIG. 6, the reinforcing part 20 (FIG. 2) may not be provided. Further, the front vertical groove G0 and the rear vertical groove G5 may be smoothly connected to each other.

As shown in the examples of FIGS. 7 and 8, the front longitudinal groove G0 and the first bent groove G1 may intersect with a T shape instead of a cross shape.

As shown in the example of FIGS. 7 and 9, the auxiliary bending groove G3 may extend from the front longitudinal groove G0 in the vicinity of the first intersection C1 to the outer edge 10 obliquely rearward. In this case, the region 30 has a triangular shape.

Moreover, as shown in the example of FIG. 8, the average value of the second bent groove G2 and the average value of the cross-sectional area may be approximately the same as those values of the first bent groove G1.

As in the example of FIGS. 7 and 9, the auxiliary bending groove G4 (FIG. 2) different from the auxiliary bending groove G3 may not be provided. In these examples, the outsole 2 is provided from the inner edge 11 to the outer edge 10 of the midsole 1. In this case, for example, the first bent groove G1 extends from the end of the outer edge 10 to the end of the inner edge 11. It can be recognized as extending.

In each of the embodiments, the front longitudinal groove G0 and the first bent groove G1 are formed at least on the ground contact surface side of the shoe sole. However, as shown in Example 5 in FIG. 10, for example, the first bent groove G <b> 1 may be formed on the upper surface 1 </ b> F on the side opposite to the ground surface side.

In the first to fourth embodiments, the front longitudinal groove G0 and the first bent groove G1 in FIG. 1 actually intersect at the first intersection C1. However, the front longitudinal groove G0 and the first bent groove G1 do not have to actually intersect.

FIG. 15A, FIG. 15B, and FIG. 16A show an example in which the front longitudinal groove G0 and the first bent groove G1 are partially discontinuous with each other.

In FIG. 15A, in the rear DB of the first bent groove G1, the outsole 2 has a portion 21 that is connected to the inside and outside and is grounded. In this case, the first bent groove G1 and the front longitudinal groove G0 are discontinuous with each other in the portion 21.

In FIG. 15B, the outsole 2 is connected to the front and back on both sides of the front longitudinal groove G0, and has a portion 22 to be grounded. In this case, in the part 22, the outer bent portion G10 and the inner bent portion G11 are separated from each other and are discontinuous.

In FIG. 16A, the midsole 1 is exposed at the portion 23 including the first intersection C1. This portion 23 is not recessed as compared with other portions of the midsole 1. When the protruding amount of the outsole 2 from the midsole 1 is small, it is not necessary to determine whether the portion 23 is a part of the front longitudinal groove G0 and / or the first bending groove G1.

In the example of FIG. 16B, the first bent groove G1 is set so that the center line L1 is a straight line. In this case, the width of the groove of the first bent groove G1 may be constant, but the width of the groove may increase from the central portion 1C toward the outer edge 10 and / or the inner edge 11 as shown in FIG. 16B. Moreover, it is preferable that the groove end G12 on the toe side of the first bent groove G1 is formed to be convex rearward, and more preferably formed in an arc shape.

Next, a test for verifying the inclination of the groove of the first bent groove G1 will be described.

T1 to T4 in FIG. 13 were prepared as test samples. In the shoe soles of the test samples T1 to T3, a groove G15 corresponding to the first bent groove G1 (FIG. 1) was formed at a position indicated by a two-dot chain line in FIG. The angles of the grooves G15 of the test samples T1 to T3 with respect to the center SC were set to 70 °, 88 °, or 106 °, respectively. The test sample T4 is not provided with a groove corresponding to the first bent groove G1.

The subject walked at 6 km / h while wearing the shoes of the test samples T1 to T4, and measured the swing width WΦ in the above-mentioned two-leg support period TE in FIG. The result is shown in FIG. The subject is a man in his 60s.

From the test results of FIG. 13, it can be seen that the test sample T3 having the groove G15 approximate to the first bent groove G1 of each example is superior in stability performance to the other test samples T1, T2, and T4.

Next, a test verified with respect to the shoe sole of Example 1 (FIG. 1) will be described.

As a test sample T5 in FIG. 14, a shoe having a shoe sole that defines grooves approximate to the grooves G0 to G7 in FIG. As test samples T6 and T7, the current version of the shoe was prepared.

Three test subjects wore each of the shoes and walked at 4 km / h, and the swing width WΦ in the both-leg support period TE in FIG. 12 was measured. The result is shown in FIG.

From the test results in FIG. 14, it can be seen that the test sample T5 approximated to the structure of Example 1 is superior in stability performance to the other test samples T6 and T7.

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 midsole may be provided with a gel or sheath-like cushioning part. In addition, the main sole may be formed of only a material such as a flexible midsole or only an outsole. Moreover, the groove | channel may be formed only by the outsole.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention.

The present invention can be applied to various shoes for walking and business use.

1: Midsole 1C: Central part 1F: Upper surface 10: Outer edge 11: Inner edge 2: Outsole 20: Reinforced part 21-23: Site 3: Forefoot 30, 32: Area 5: Rear foot C1: First Intersection C2: Second intersection DF: Front DB: Back G0: Front longitudinal groove G1: First bending groove G2: Second bending groove G3: Auxiliary bending groove G4: Another auxiliary bending groove G5: Rear longitudinal groove G6: Horizontal groove G7 : Vertical narrow groove G8: Upper groove G10: Outer bent portion G11: Inner bent portion H1, H2, H3, H5, H6: Depth L0, L1, L10, L11: Center line L: Outer M: Inner MS: Main sole O1 : Mother Ryukyu B1, B5: End phalanx S1, S2: Sole S10: Rear end S20: Front end SC: Shoe (center) SD: Step TE: Support both legs X: Horizontal Y: Vertical WΦ : Swing width θ: Walking angle

Claims

The shoe sole includes a front longitudinal groove G0 extending at least in the longitudinal direction Y at a central portion 1C between the inner side M and the outer side L of the forefoot portion 3, and a mother ball O1 of the forefoot portion. A first bent groove G1 that is disposed in the front DF and extends at least in the lateral direction X so as to intersect the front longitudinal groove G0 at a virtual first intersection C1;
The average depth H0 of the front longitudinal groove G0 in the range from the first intersection C1 to 5 cm behind is set to 3 to 20 mm,
The average depth H1 of the first bent groove G1 is set to 3 to 12 mm,
The first bent groove G1 extends from the central portion 1C toward the inner edge 11 to the inner bent portion G11, and extends obliquely forward from the central portion 1C toward the outer edge 10. And an outer bent portion G10.
The second angle β formed by the outer bent portion G10 and the front vertical groove G0 is larger than the first angle α formed by the inner bent portion G11 and the front vertical groove G0.
The shoe sole of claim 1,
The front longitudinal groove G0 is formed by both the outsole 2 and the midsole 1,
The first bent groove G1 is formed by both the outsole 2 and the midsole 1.
The shoe sole according to claim 1 or 2,
The shoe sole further defines an auxiliary bending groove G3 extending obliquely rearward from the front longitudinal groove G0 toward the outer edge 10 in the rear DB from the outer bending part G10,
The average depth H3 of the auxiliary bending groove G3 in the range from the outer edge 10 to the front longitudinal groove G0 is the same as the average depth H1 of the first bending groove G1, or the first bending groove It is smaller than the average depth H1 of G1.
In the shoe sole according to claim 3, an average depth H3 of the auxiliary bending groove G3 is set to 2 to 8 mm.
The sole according to claim 3 or 4,
The shoe sole region 30 surrounded by the front longitudinal groove G0, the first bent groove G1, the auxiliary bent groove G3, and the outer edge 10 is formed in a triangular shape, a trapezoidal shape or a fan shape.
The shoe sole according to any one of claims 1 to 5,
The shoe sole further defines one or more lateral grooves G6 different from the first bent groove G1 extending in the lateral direction X intersecting the longitudinal direction Y in the forefoot portion 3,
The average depth H1 of the first bent groove G1 is larger than the average depth H6 of each of the one or more lateral grooves G6.
The shoe sole according to any one of claims 1 to 6,
The shoe sole has a rear vertical groove G5 extending at least in the vertical direction Y between the inner side M and the outer side L of the rear foot part 5, and a virtual first groove disposed in the rear foot part 5 in the rear vertical groove G5. And further defining a second bent groove G2 extending at least in the lateral direction X so as to intersect at two intersection points C2,
The average depth H5 of the rear longitudinal groove G5 in the range from the second intersection C2 to 5 cm forward is set to 3 to 16 mm,
The average depth H2 of the second bent groove G2 is set to 1 to 12 mm,
The second bent groove G2 extends obliquely forward from the inner edge 11 toward the outer edge 10.
A shoe sole, wherein the shoe sole includes a front longitudinal groove G0 extending at least in the longitudinal direction Y at a central portion 1C between the inner side M and the outer side L of the forefoot portion 3; A first bent groove G1 which is disposed in front DF from O1 and extends in at least the lateral direction X so as to intersect the front longitudinal groove G0 at a virtual first intersection C1;
The average value of the cross-sectional area of the front longitudinal groove G0 in the range from the first intersection C1 to 5 cm rear DB is set to 10 to 200 square millimeters,
The average value of the cross-sectional area of the first bent groove G1 is set to 10 to 120 square millimeters,
The first bent groove G1 extends from the central portion 1C toward the inner edge 11 to the inner bent portion G11, and extends obliquely forward from the central portion 1C toward the outer edge 10. And an outer bent portion G10.
The second angle β formed by the outer bent portion G10 and the front vertical groove G0 is larger than the first angle α formed by the inner bent portion G11 and the front vertical groove G0.
The sole of claim 8,
The front longitudinal groove G0 is formed by both the outsole 2 and the midsole 1,
The first bent groove G1 is formed by both the outsole 2 and the midsole 1.
The sole according to claim 8 or 9,
The shoe sole further defines an auxiliary bending groove G3 extending obliquely rearward from the front longitudinal groove G0 toward the outer edge 10 behind the outer bending part G10,
The average value of the cross-sectional area of the auxiliary bending groove G3 in the range from the outer edge 10 to the front longitudinal groove G0 is the same as the average value of the cross-sectional area of the first bending groove G1, or the first It is smaller than the average value of the bending groove G1.
The shoe sole according to claim 10, wherein an average value of a cross-sectional area of the auxiliary bending groove G3 is set to 10 to 100 square millimeters.
The sole according to claim 10 or 11,
The shoe sole region 30 surrounded by the front longitudinal groove G0, the first bent groove G1, the auxiliary bent groove G3, and the outer edge 10 is formed in a triangular shape, a trapezoidal shape or a fan shape.
The shoe sole according to any one of claims 8 to 12,
The shoe sole further defines one or more lateral grooves G6 extending in the lateral direction X intersecting the longitudinal direction Y in the forefoot portion 3 and different from the first bent groove G1.
The average value of the cross-sectional area of the first bent groove G1 is larger than the average value of the cross-sectional areas of the one or more horizontal grooves G6.
The shoe sole according to any one of claims 8 to 13,
The shoe sole has a rear vertical groove G5 extending at least in the vertical direction Y between the inner side M and the outer side L of the rear foot part 5, and a virtual first groove disposed in the rear foot part 5 in the rear vertical groove G5. And further defining a second bent groove G2 extending at least in the lateral direction X so as to intersect at two intersection points C2,
The average value of the cross sectional area of the rear longitudinal groove 5 in the range from the second intersection C2 to 5 cm forward is set to 25 to 600 square millimeters,
The average value of the cross-sectional area of the second bent groove G2 is set to 5 to 120 square millimeters,
The second bent groove G2 extends obliquely forward from the inner edge 11 toward the outer edge 10.
A shoe sole, wherein the shoe sole includes a front longitudinal groove G0 extending at least in the longitudinal direction Y at a central portion 1C between the inner side M and the outer side L of the forefoot portion 3; A first bent groove G1 which is disposed in front DF from O1 and extends in at least the lateral direction X so as to intersect the front longitudinal groove G0 at a virtual first intersection C1;
The average depth H0 of the front longitudinal groove G0 in the range from the first intersection C1 to 5 cm behind is set to 3 to 20 mm,
The average value of the cross-sectional area of the front longitudinal groove G0 in the range from the first intersection C1 to 5 cm behind is set to 25 to 200 square millimeters,
The average depth H1 of the first bent groove G1 is set to 3 to 12 mm,
The average value of the cross-sectional area of the first bent groove G1 is set to 10 to 120 square millimeters,
The first bent groove G1 extends from the central portion 1C toward the inner edge 11 to the inner bent portion G11, and extends obliquely forward from the central portion 1C toward the outer edge 10. And an outer bent portion G10.
The second angle β formed by the outer bent portion G10 and the front vertical groove G0 is larger than the first angle α formed by the inner bent portion G11 and the front vertical groove G0.
A shoe sole, wherein the shoe sole includes a front longitudinal groove G0 extending at least in the longitudinal direction Y at a central portion 1C between the inner side M and the outer side L of the front foot portion 3, and at least the longitudinal length at the front foot portion 3. One or a plurality of vertical thin grooves G7 extending in the direction Y and different from the front vertical groove G0, and a first first intersection C1 disposed in the front DF from the front ball groove O1 of the front foot 3 with a virtual first intersection C1. A first bent groove G1 extending at least in the horizontal direction X so as to intersect with each other, and one or a plurality of horizontal grooves G6 extending at least in the horizontal direction in the forefoot portion 3 and different from the first bent groove G1,
The average depth H0 of the front longitudinal groove G0 in the range from the first intersection C1 to the rear of 5 cm is greater than the average depth H7 of each of the one or more vertical fine grooves G7,
The average depth of the first bent groove G1 is greater than the average depth H6 of each of the one or more lateral grooves G6,
The first bent groove G1 has an inner bent portion G11 extending laterally or obliquely rearward from the first intersection C1 toward the inner edge 11, and obliquely forward from the first intersection C1 toward the outer edge 10. An extending outer bend G10,
The second angle β formed by the outer bent portion G10 and the front vertical groove G0 is larger than the first angle α formed by the inner bent portion G11 and the front vertical groove G0.
A shoe sole, wherein the shoe sole includes a front longitudinal groove G0 extending at least in the longitudinal direction Y at a central portion 1C between the inner side M and the outer side L of the front foot portion 3, and at least the longitudinal length at the front foot portion 3. One or a plurality of vertical thin grooves G7 extending in the direction Y and different from the front vertical groove G0, and a first first intersection C1 disposed in the front DF from the front ball groove O1 of the front foot 3 with a virtual first intersection C1. A first bent groove G1 extending at least in the horizontal direction X so as to intersect with each other, and one or a plurality of horizontal grooves H6 extending at least in the horizontal direction in the forefoot portion 3 and different from the first bent groove G1,
The average value of the cross-sectional area of the front longitudinal groove G0 in the range from the first intersection C1 to the rear of 5 cm is larger than the average value of the cross-sectional areas of the one or more vertical fine grooves G7,
The average value of the cross-sectional area of the first bent groove G1 is larger than the average value of the cross-sectional areas of the one or more horizontal grooves G6,
The first bent groove G1 extends from the central portion 1C toward the inner edge 11 to the inner bent portion G11, and extends obliquely forward from the central portion 1C toward the outer edge 10. And an outer bent portion G10.
The second angle β formed by the outer bent portion G10 and the front vertical groove G0 is larger than the first angle α formed by the inner bent portion G11 and the front vertical groove G0.
The shoe sole according to any one of claims 1 to 17, wherein the first bent groove G1 is formed to protrude rearward.
The shoe sole according to any one of claims 1 to 18, wherein the first bent groove G1 is formed in an arc shape.
The shoe sole according to any one of claims 1 to 19,
The front longitudinal groove G0 and the first bent groove G1 are formed at least on the ground contact surface side of the shoe sole.
The sole according to claim 20, wherein the sole is
In a region 30 between the outer bent portion G10 and the auxiliary bent groove G3 on the upper surface opposite to the ground surface and / or a region 32 ahead of the outer bent portion G10 on the upper surface,
An upper groove G8 extending obliquely forward along the outer bent portion G10 is further defined.