JP2021153891A - Shoe - Google Patents

Abstract

To relatively enhance sensation of pressure with respect to a forefoot part of a wearer's foot on a sole for a shoe.SOLUTION: A sole 1 for a shoe S includes: a sole body 2; and multiple lower-side projection parts 7 and multiple upper-side projection parts 8 which are arranged in positions corresponding to at least a forefoot part F in the sole body 2. The sole body 2 is configured so that stiffness of a part corresponding to a mid-foot part M becomes higher than stiffness of a part corresponding to the forefoot part F.SELECTED DRAWING: Figure 8

Description

The present disclosure relates to shoes.

Conventionally, shoes such as Patent Document 1 have been proposed as shoes that can recognize the strength of pressure transmitted to various parts of the sole.

Patent Document 1 describes a sole that supports the entire sole of the wearer, a plurality of lower convex portions that project downward from the lower part of the sole toward the road surface side, and are arranged at intervals from each other, and an upper portion of the sole. Disclosed is a shoe comprising a plurality of upper convex portions, each of which projects upward toward the sole side of the wearer and is arranged at a position overlapping each lower convex portion on the upper side of the sole. The plurality of lower protrusions and the plurality of upper protrusions are arranged over the entire sole in bottom view and plan view.

JP-A-2019-63491

In the shoes of Patent Document 1, the reaction force received from the road surface is transmitted to a plurality of lower convex portions, and the reaction force is directly transmitted from each lower convex portion through each upper convex portion to the sole of the wearer. Is transmitted to. As a result, the wearer can recognize the strength of the pressure transmitted to each part of the sole for each part of the sole.

By the way, when the wearer exercises, a load is likely to be applied to a position corresponding to the forefoot portion of the wearer's foot on the sole of the shoe. Therefore, it is important to concentrate the pressure transmitted from the lower convex portion and the upper convex portion on the forefoot portion of the wearer's foot.

However, in the shoe of Patent Document 1, since the plurality of lower convex portions and the plurality of upper convex portions are arranged over the entire area of the sole, the pressure transmitted from the plurality of lower convex portions and the plurality of upper convex portions is transmitted. , Disperses over the entire sole of the wearer. That is, in the above shoes, it is difficult to concentrate the pressure on the forefoot portion of the wearer's foot.

The present disclosure has been made in view of these points, and an object thereof is to relatively increase the feeling of pressure on the forefoot portion of the wearer's foot.

To achieve the above objectives, the first disclosure relates to a sole for shoes, which sole is located at the sole body and at least corresponding to the forefoot of the wearer's foot on the sole body. , Each of which is arranged at a position corresponding to at least the forefoot part of the wearer's foot on the sole body, each of which projects toward the upper side of the sole body. Moreover, it is provided with a plurality of upper convex portions which are paired up and down so as to overlap each of the plurality of lower convex portions in a cross-sectional view. The sole body is configured such that the rigidity of the portion corresponding to the midfoot portion of the wearer's foot is higher than the rigidity of the portion corresponding to the forefoot portion of the wearer's foot.

In the first disclosure, each upper convex portion is paired up and down so as to overlap each lower convex portion in a cross-sectional view. Therefore, the reaction force received from the road surface is transmitted to the lower convex portion, and the reaction force is directly transmitted from each lower convex portion to the sole of the foot via each upper convex portion. This allows the wearer to recognize the strength of the pressure transmitted to various parts of the sole. The sole body is configured so that the rigidity of the portion corresponding to the midfoot portion is higher than the rigidity of the portion corresponding to the forefoot portion. With such a configuration, so-called shank breakage is less likely to occur, and the pressure transmitted from the lower convex portion and the upper convex portion is easily transmitted to the sole of the wearer's forefoot portion in a timely manner. Therefore, in the first disclosure, the feeling of pressure on the wearer's forefoot can be relatively enhanced.

In the second disclosure, in the first disclosure, the sole body is configured such that the value of the flexural rigidity at the portion corresponding to the midfoot portion of the wearer's foot is 0.258 Nm / deg or more.

In this second disclosure, by setting the lower limit value of the bending rigidity in the portion corresponding to the midfoot portion of the sole body, it is possible to easily obtain the sole body in which the shank is less likely to break.

In the third disclosure, in the first or second disclosure, the upper surface of the sole body at a position corresponding to the midfoot portion of the wearer's foot is formed to be substantially flat.

In this third disclosure, the lower convex portion is not provided on the upper surface of the position corresponding to the midfoot portion of the midsole. That is, stress is less likely to be concentrated on the upper surface. This makes it possible to increase the bending rigidity of the portion of the sole corresponding to the midfoot portion to be higher than the bending rigidity of the portion corresponding to the forefoot portion of the sole. As a result, the shank breakage can be suppressed.

In the fourth disclosure, in any one of the first to third disclosures, the sole body has an outsole and a midsole arranged on the upper side of the outsole, and the midsole is worn. The Young's modulus of the portion corresponding to the midfoot portion of the person's foot is configured to be 0.75 MPa or more.

In this fourth disclosure, the flexural rigidity of the portion of the sole corresponding to the midfoot portion is ensured to the extent that shank breakage can be suppressed. Therefore, the feeling of pressure on the wearer's forefoot can be relatively increased.

In the fifth disclosure, in any one of the first to fourth disclosures, a reinforcing body made of a material having a higher rigidity than the sole body is provided at a position corresponding to the midfoot portion of the wearer's foot on the sole body. The reinforcing body is provided and extends in the foot length direction from the position corresponding to the Rifthran joint of the wearer's foot to the position corresponding to the Chopard joint in the sole body.

In this fifth disclosure, the rigidity of the portion corresponding to the midfoot portion of the sole body is increased by the reinforcing body provided at the position corresponding to the midfoot portion of the sole body, and the rigidity of the portion corresponding to the forefoot portion of the sole body is provided. It becomes easier to raise than. As a result, the shank breakage can be suppressed.

The sixth disclosure relates to a sole for shoes, which soles are located on the sole body and at least corresponding to the forefoot of the wearer's foot on the sole body, each underneath the sole body. A plurality of downward protrusions protruding toward the sole body and a plurality of downward protrusions on the sole body at a position corresponding to at least the forefoot part of the wearer's foot, each protruding toward the upper side of the sole body and in a cross-sectional view. It is provided with a plurality of upper convex portions that form a pair of upper and lower portions so as to overlap each of the portions. The sole body is configured such that the thickness of the portion corresponding to the hind foot portion of the wearer's foot is larger than the thickness of the portion corresponding to the forefoot portion of the wearer's foot.

In the sixth disclosure, since the thickness of the hind foot portion and the thickness of the forefoot portion are provided in the sole body, the wearer's foot tends to be in a forward leaning posture. Therefore, the pressure transmitted from the lower convex portion and the upper convex portion is easily transmitted to the sole of the wearer's forefoot portion in a timely manner. Therefore, in the sixth disclosure, the feeling of pressure on the wearer's forefoot can be relatively enhanced.

In the seventh disclosure, in the sixth disclosure, the difference between the thickness of the portion corresponding to the hind foot portion of the wearer's foot and the thickness of the portion corresponding to the forefoot portion of the wearer's foot is 8 mm in the sole body. It is configured to be as described above.

In this seventh disclosure, the wearer's foot is likely to be maintained in a forward leaning position. As a result, the wearer's feeling of pressure on the forefoot can be relatively increased.

The eighth disclosure is a shoe comprising any one of the soles of the first to seventh disclosures.

In this eighth disclosure, shoes having the same effects as those of the first to seventh disclosures can be obtained.

As described above, according to the present disclosure, it is possible to relatively increase the feeling of pressure on the forefoot portion of the wearer's foot.

FIG. 1 is an overall perspective view showing shoes according to the first embodiment. FIG. 2 is a perspective view showing the sole according to the first embodiment as viewed from above on the inner instep side. FIG. 3 is a plan view of the sole according to the first embodiment. FIG. 4 is a plan view schematically showing the sole according to the first embodiment together with the skeletal structure of the wearer's foot. FIG. 5 is a bottom view of the sole according to the first embodiment. FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 8 is a cross-sectional view showing the cross-sectional structure of the sole in the cross-sectional line VIII-VIII of FIG. 3 together with the skeletal structure of the wearer's foot. FIG. 9 is a view corresponding to FIG. 9 showing the cross-sectional structure of the sole according to the modified example of the first embodiment together with the skeletal structure of the wearer's foot. FIG. 10 is a view corresponding to FIG. 8 showing the cross-sectional structure of the sole according to the second embodiment together with the skeletal structure of the wearer's foot. FIG. 11 is a graph showing the load ratio X of the forefoot region in the sole of each test piece.

Hereinafter, each embodiment of the present disclosure will be described in detail with reference to the drawings. The following description of each embodiment is merely exemplary and is not intended to limit the disclosure, its application or its use.

[First Embodiment]
FIG. 1 shows the entire shoe S according to the first embodiment of the present disclosure. This shoe S is used, for example, as sports shoes for running and various competitions, sneakers for daily use, and shoes for rehabilitation.

Here, the shoe S exemplifies only the shoe for the left foot. Since the right foot shoe is configured to be symmetrical with the left foot shoe, only the left foot shoe will be described below, and the description of the right foot shoe will be omitted.

Further, in the following description, the upper side and the lower side represent the vertical positional relationship of the shoe S, and the front (front side) and the rear (rear side) represent the positional relationship of the shoe S in the foot length direction (front-back direction). The inner instep side and the outer instep side represent the positional relationship of the shoe S in the foot width direction. Further, the "foot arch portion" shall include both the arch portion on the inner instep side and the arch portion on the outer instep side of the wearer's foot f. Further, the "midfoot portion M" refers to a region extending from the position of the riffslan joint LF of the wearer's foot f to the position of the Chopard joint CP in the foot length direction (see FIGS. 4 and 8).

(upper)
As shown in FIG. 1, the shoe S includes an upper 10 for covering the wearer's foot f. As the material of the upper 10, knitted fabric, woven fabric, non-woven fabric, synthetic leather, artificial leather, natural leather and the like are suitable. The upper 10 is fixed to, for example, the peripheral edge 5 of the midsole 4, which will be described later, with an adhesive or the like.

A foot insertion portion 11 for inserting the wearer's foot f is provided on the upper side of the upper 10. Further, on the upper side of the upper 10, an opening 12 that communicates with the foot insertion portion 11 and extends in the front-rear direction is formed. An eyelet decoration 13 is provided in the opening 12. The front edge of the opening 12 is provided with a tongue piece 15 for opening or closing the opening 12.

The eyelet decoration 13 is made of, for example, artificial leather. The eyelet decoration 13 is arranged at a position corresponding to the instep portion of the wearer's foot f on the upper 10. The eyelet decoration 13 is fixed to the upper 10 by sewing or the like. Eyelet holes 14, 14, ... Arranged at intervals in the foot length direction are formed on the left and right edges of the eyelet decoration 13.

A shoelace 16 is provided on the upper 10. The shoelace 16 can be inserted into the eyelet holes 14, 14, ... Located at the left and right edges of the eyelet decoration 13. Then, by fastening both ends of the shoelace 16 located at the foot insertion portion 11, the upper 10 can be fitted to the instep portion of the wearer.

(Sole)
As shown in FIGS. 1 to 3, the shoe S includes a sole 1. The sole 1 has a sole body 2. The sole body 2 is composed of an outsole 3 and a midsole 4.

The outsole 3 is composed of a hard elastic member having a hardness higher than that of the midsole 4. Specifically, the material of the outsole 3 is, for example, a thermoplastic resin such as ethylene-vinyl acetate copolymer (EVA), a thermosetting resin such as polyurethane (PU), or a rubber material such as butadiene rubber or chloroprene rubber. Is suitable. The hardness of the outsole 3 is preferably set to, for example, 50A to 80A on the Asker A scale.

As shown in FIGS. 5 to 8, the outsole 3 is formed with a bottomed lower recess 3a that is recessed upward from the lower surface of the outsole 3 in a cross-sectional view. The lower recess 3a is arranged in substantially the entire area of the outsole 3 when viewed from the bottom (see FIG. 5).

As shown in FIGS. 6 to 8, the midsole 4 is laminated on the upper side of the outsole 3 by, for example, an adhesive. The midsole 4 is formed of a soft elastic material having a lower rigidity than the outsole 3. Specifically, as the material of the midsole 4, for example, a thermoplastic synthetic resin such as ethylene-vinyl acetate copolymer (EVA) and its foam, a thermosetting resin such as polyurethane (PU) and its foam, and butadiene Rubber materials such as rubber and chloroprene rubber and their foams are suitable. The hardness of the midsole 4 is preferably set to, for example, 15C to 65C on the Asker C scale.

As shown in FIGS. 3, 6 and 7, a peripheral edge portion 5 for supporting the sole peripheral edge of the wearer's foot f is formed on the peripheral edge of the upper surface of the midsole 4. Then, as shown in FIG. 6, between the peripheral edge portion 5 located on the inner instep side and the peripheral edge portion 5 located on the outer instep side, there is a recess from the upper surface of the peripheral edge portion 5 downward in a cross-sectional view. A bottom-shaped upper recess 4a is formed. The upper concave portion 4a is arranged at a position corresponding to the forefoot portion F of the wearer's foot f on the midsole 4 in a plan view (see FIG. 4).

(Lower convex part and upper convex part)
As shown in FIGS. 2 to 8, the sole 1 has a plurality of lower convex portions 7, 7, ... And a plurality of upper convex portions 8, 8, .... In this embodiment, the lower convex portions 7, 7, ... Are arranged on the sole 1 so as to correspond to the entire sole of the wearer's foot f (see FIG. 5). On the other hand, the upper convex portions 8, 8, ... Are arranged at positions corresponding to the forefoot portion F of the wearer's foot f on the sole 1 (see FIG. 4).

As shown in FIG. 5, the lower convex portions 7, 7, ... Are provided in the lower concave portion 3a of the outsole 3. Specifically, as shown in FIGS. 6 to 8, each lower convex portion 7 projects downward from the bottom surface of the lower concave portion 3a. Each lower convex portion 7 has a substantially rectangular shape, for example, in a cross-sectional view. The lower convex portions 7, 7, ... Are formed so that their respective thicknesses and lengths are different from each other.

As shown in FIGS. 2 to 4, the upper convex portions 8, 8, ... Are provided in the upper concave portion 4a of the midsole 4. Specifically, as shown in FIGS. 6 and 8, each upper convex portion 8 projects upward from the bottom surface of the upper concave portion 4a. The upper end of each upper convex portion 8 has, for example, a substantially hemispherical shape. The upper convex portions 8, 8, ... Are formed so that their respective thicknesses and lengths are different from each other, for example.

As shown in FIGS. 6 and 8, each upper convex portion 8 is arranged so as to be located directly above each lower convex portion 7 in the region of the forefoot portion F. That is, each upper convex portion 8 is paired up and down so as to overlap each lower convex portion 7 located in the region of the forefoot portion F in cross-sectional view.

(Rigidity of sole body)
As a characteristic configuration of this embodiment, the sole body 2 is configured such that the rigidity of the portion corresponding to the midfoot portion M of the wearer's foot is higher than the rigidity of the portion corresponding to the forefoot portion F. ..

Specifically, the sole body 2 is preferably configured so that the value of the bending rigidity in the portion corresponding to the midfoot portion M is 0.258 Nm / deg or more. The rigidity value is a numerical value obtained when a bending test is performed on the sole body 2 not provided with the reinforcing body 9 described later.

Here, in order to confirm that the sole body 2 has the above-mentioned rigidity value, for example, the following measurement method (bending test) is suitable. That is, using a general-purpose bending tester (for example, "Shoe Flexer" manufactured by Exeter Research Co., Ltd.) (not shown), the press sensor portion of the tester is used as a midfoot portion of the sole body 2 to which the reinforcing body 9 described later is not provided. It is fixed in a state of being pressed against a position corresponding to M, and in the fixed state, the rear end portion of the sole body 2 is lifted from a horizontal position to a predetermined angle (for example, 40 deg). At this time, the rigidity value output from the bending tester may be 0.258 Nm / deg or more.

Further, in this embodiment, the upper surface of the position corresponding to the midfoot portion M and the hindfoot portion H of the midsole 4 is formed to be substantially flat. That is, the upper convex portions 8, 8, ... Are not provided at least at positions corresponding to the midfoot portion M in the midsole 4. As a result, the rigidity of the portion corresponding to the midfoot portion M of the sole body 2 can be relatively increased. Then, by making the upper surface of the position corresponding to the midfoot portion M in the midsole 4 substantially flat, the Young's modulus of the portion corresponding to the midfoot portion M in the midsole 4 becomes 0.75 MPa or more. Is preferable. The above-mentioned "substantially flat shape" includes not only a case where it is completely flat but also a case where it can be regarded as substantially flat, such as when it is slightly rounded.

(Reinforcement body)
As shown in FIGS. 3 and 4, the sole body 2 is provided with a reinforcing body 9 for further increasing the rigidity of the portion corresponding to the midfoot portion M of the wearer. The reinforcing body 9 is made of a thin-walled layer that is harder than the outsole 3 and the midsole 4, and is preferably made of a hard elastic member.

Specific examples of the rigid elastic member include thermoplastic resins such as thermoplastic polyurethane (TPU), polyamide elastomer (PAE), and ABS resin, and thermosetting resins such as epoxy resin and unsaturated polyester resin. A fiber-reinforced plastic (FRP) in which carbon fiber, aramid fiber, glass fiber or the like is used as a reinforcing fiber and a thermosetting resin or a thermoplastic resin is used as a matrix resin may be used.

The reinforcing body 9 has a substantially trapezoidal shape in a plan view. Specifically, the outer shape of the reinforcing body 9 has a substantially trapezoidal shape such that the length of the side located on the inner instep side is longer than the length of the side located on the outer instep side in a plan view. That is, the reinforcing body 9 is configured such that the position corresponding to the arch portion on the outer instep side of the arch portion of the wearer's foot is higher in rigidity than the position corresponding to the arch portion on the outer instep side. There is.

As shown in FIGS. 4 and 8, the reinforcing body 9 is arranged at a position corresponding to the midfoot portion M of the wearer's foot on the sole body 2. That is, the reinforcing body 9 is arranged at a position behind the upper convex portions 8, 8, ... In the foot length direction. The reinforcing body 9 extends from the position corresponding to the Rifthran joint LF of the wearer's foot f to the position corresponding to the Chopard joint CP in the sole body 2 in the foot length direction.

As shown in FIGS. 7 and 8, the reinforcing body 9 is formed in a substantially plate shape. In this embodiment, the thickness of the reinforcing body 9 is constant. The reinforcing body 9 is laminated and arranged between the outsole 3 and the midsole 4 in a cross-sectional view. Specifically, the lower surface of the reinforcing body 9 is fixed to the upper surface of the outsole 3, while the upper surface of the reinforcing body 9 is fixed to the lower surface of the midsole 4. The thickness of the reinforcing body 9 does not have to be constant.

[Action and effect of the first embodiment]
As described above, each upper convex portion 8 is paired up and down so as to overlap each lower convex portion 7 in a cross-sectional view. Therefore, the reaction force received from the road surface is transmitted to the lower convex portions 7, 7, ..., And the reaction force is directly transmitted from each lower convex portion 7 through each upper convex portion 8 to the foot of the foot f. It is transmitted to the bottom. As a result, the wearer can recognize the strength of the pressure transmitted to each part of the sole of the forefoot F.

Here, in general, when the sole of the shoe comes into contact with the road surface during exercise, in the wearer's foot, from the outer instep side of the heel portion to the substantially center of the hindfoot portion and the midfoot portion in the foot width direction and inside the forefoot portion. A load locus (so-called load path) of weight transfer that passes through the instep side to the toe side will be generated. Then, in the above road path, when the bending rigidity of the portion corresponding to the midfoot portion of the sole is relatively low, a phenomenon that the portion corresponding to the midfoot portion of the sole breaks (that is, "shank breakage") occurs. It will be easier. When this shank break occurs, the weight transfer from the midfoot to the toe side is hindered in the process of the load path. As a result, the timing of weight transfer toward the forefoot portion of the wearer's foot is delayed, and it becomes difficult for the wearer's weight to be applied to the portion corresponding to the forefoot portion of the sole. As a result, in the sole of the shoe shown in the prior art (for example, Patent Document 1 described above), the pressure transmitted from the lower convex portion and the upper convex portion is transmitted to the sole of the wearer's forefoot in a timely manner. It becomes difficult.

On the other hand, the sole body 2 of this embodiment is configured such that the rigidity of the portion corresponding to the midfoot portion M is higher than the rigidity of the portion corresponding to the forefoot portion F. With such a configuration, the shank breakage as described above is less likely to occur. As a result, in the above road pass, the timing of weight transfer from the midfoot portion M to the forefoot portion F is not delayed, and the weight of the wearer is likely to be applied to the portion of the sole 1 corresponding to the forefoot portion F. As a result, the pressure transmitted from the lower convex portions 7, 7, ... And the upper convex portions 8, 8, ... Is easily transmitted to the sole of the wearer's forefoot portion F in a timely manner. Therefore, in the sole 1 according to the first embodiment and the shoe S provided with the sole 1, the wearer can relatively increase the feeling of pressure on the forefoot portion F.

Further, the sole body 2 is configured so that the value of the bending rigidity in the portion corresponding to the midfoot portion M is 0.258 Nm / deg or more. By setting the lower limit value of the bending rigidity in the portion corresponding to the midfoot portion M of the sole body 2 in this way, the sole body 2 in which the shank is less likely to break can be easily obtained.

Further, the upper surface of the midsole 4 at the position corresponding to the midfoot portion M is formed to be substantially flat. That is, the lower convex portions 7, 7, ... Are not provided on the upper surface of the position corresponding to the midfoot portion M of the midsole 4. That is, stress is less likely to be concentrated on the upper surface. As a result, the bending rigidity of the portion of the sole 1 corresponding to the midfoot portion M can be made higher than the bending rigidity of the portion of the sole 1 corresponding to the forefoot portion F. As a result, the shank breakage can be suppressed.

Further, the midsole 4 is configured so that the Young's modulus of the portion corresponding to the midfoot portion M is 0.75 MPa or more. With this configuration, the flexural rigidity of the portion of the sole 1 corresponding to the midfoot portion M is ensured to the extent that shank breakage can be suppressed. Therefore, the wearer's feeling of pressure on the forefoot F can be relatively increased.

Further, by the reinforcing body 9 provided at the position corresponding to the midfoot portion M of the sole body 2, the rigidity of the portion corresponding to the midfoot portion M of the sole body 2 is increased to the portion corresponding to the forefoot portion F of the sole body 2. It becomes easier to increase than the rigidity of. As a result, the shank breakage can be suppressed.

[Modified example of the first embodiment]
In the first embodiment, the reinforcing body 9 is provided on the sole body 2, but the present embodiment is not limited to this. For example, as in the modified example shown in FIG. 9, the reinforcing body 9 does not have to be provided on the sole body 2.

Even in such a modified example, the value of the bending rigidity at the portion corresponding to the midfoot portion M of the sole body 2 may be 0.258 Nm / deg or more. Alternatively, the upper surface of the position corresponding to the midfoot portion M of the midsole 4 may be formed substantially flat. Alternatively, the Young's modulus of the portion of the midsole 4 corresponding to the midfoot portion M may be 0.75 MPa or more. That is, if the sole body 2 is configured so that the rigidity of the portion corresponding to the midfoot portion M is higher than the rigidity of the portion corresponding to the forefoot portion F, the wearer is similarly to the first embodiment. It is possible to relatively increase the feeling of pressure on the forefoot F.

[Second Embodiment]
FIG. 10 shows the sole 1 according to the second embodiment of the present disclosure. In the second embodiment, the configuration of the sole 1 is different from that in the first embodiment. The other configuration of the sole 1 according to the second embodiment is the same as the configuration of the sole 1 according to the first embodiment. Therefore, in the following description, the same parts as those in FIGS. 1 to 8 are designated by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, the sole body 2 is configured such that the thickness of the portion corresponding to the hindfoot portion H is larger than the thickness of the portion corresponding to the forefoot portion M. In particular, in the sole body 2, it is preferable that the difference between the thickness of the portion corresponding to the hind foot portion H and the thickness of the portion corresponding to the forefoot portion F is set to 8 mm or more. The sole body 2 of this embodiment is not provided with the reinforcing body 9 shown in the first embodiment.

Specifically, the heel support portion 20 is provided at a position corresponding to the hind foot portion H of the sole body 2 shown in the first embodiment. The heel support portion 20 is made of the same material as, for example, the midsole 4. The heel support portion 20 is formed in a substantially plate shape in a cross-sectional view. The thickness of the heel support portion 20 is preferably 8 mm or more. The lower surface of the heel support portion 20 is fixed to the upper surface of the midsole 4 with, for example, an adhesive.

In this embodiment, since the thickness of the hind foot portion H and the thickness of the forefoot portion F are provided in the sole body 2, the wearer's foot f tends to be in a forward leaning posture. As a result, the timing of the weight transfer from the hindfoot portion H to the forefoot portion F in the road pass is not delayed, and the weight of the wearer is likely to be applied to the portion of the sole 1 corresponding to the forefoot portion F. Therefore, the pressure transmitted from the lower convex portions 7, 7, ... And the upper convex portions 8, 8, ... Is easily transmitted to the sole of the wearer's forefoot portion F in a timely manner. Therefore, even in this embodiment, the wearer can relatively increase the feeling of pressure on the forefoot portion F.

Further, the sole body 2 is configured such that the difference between the thickness of the portion corresponding to the hindfoot portion H and the thickness of the portion corresponding to the forefoot portion F is 8 mm or more. With such a configuration, the wearer's foot f is easily maintained in a forward leaning posture. As a result, the wearer's feeling of pressure on the forefoot F can be relatively increased.

[Other Embodiments]
In each of the above embodiments, the sole 1 has shown a form including the sole body 2 composed of the outsole 3 and the midsole 4, but is not limited to this form. For example, the sole body 2 may be in the form of an outsole 3.

Further, in each of the above embodiments, the upper convex portions 8, 8, ... Are arranged only at the positions corresponding to the forefoot portions F of the midsole 4, but the present invention is not limited to this embodiment. For example, in the first embodiment and its modification, the upper convex portions 8, 8, ... Are located at a position corresponding to the forefoot portion F of the sole body 2 and a position corresponding to the hindfoot portion H of the sole body 2. It may be placed on both sides. On the other hand, in the second embodiment, the upper convex portions 8, 8, ... Are located at the positions corresponding to the forefoot portions F of the sole body 2 and the midfoot portions M and / or the hindfoot portions H of the sole body 2. It may be arranged at the corresponding position.

Further, in each of the above embodiments, the lower convex portions 7, 7, ... Are arranged in substantially the entire lower surface of the outsole 3, but the present invention is not limited to this form. That is, each upper convex portion 8 may be paired up and down so as to overlap each lower convex portion 7 in a cross-sectional view, and the lower convex portions 7, 7, ... Are necessarily arranged in substantially the entire lower surface of the outsole 3. It does not have to be.

Further, in each of the above-described embodiments, the forms in which the lower convex portions 7 and 7 are formed so as to have different thicknesses and lengths from each other are shown, but the present invention is not limited to this form. That is, the lower convex portions 7 and 7 may be formed so as to have the same thickness and length. The same applies to the upper convex portions 8, 8, ....

Further, in the first embodiment and its modification, the upper surface of the sole body 2 at the position corresponding to the midfoot portion M is formed in a substantially flat shape, but the present invention is not limited to this form. That is, if the value of the bending rigidity in the portion corresponding to the midfoot portion M of the sole body 2 is 0.258 Nm / deg or more, the upper surface of the position corresponding to the midfoot portion M of the sole body 2 is not necessarily substantially. It does not have to be formed flat.

Further, in the first embodiment, the reinforcing body 9 has a substantially trapezoidal shape in a plan view, but the present invention is not limited to this form. That is, the reinforcing body 9 may have various shapes such as a circular shape, a triangular shape, and a pentagonal shape in a plan view.

Further, in the first embodiment, the reinforcing body 9 is laminated and arranged between the outsole 3 and the midsole 4, but the present invention is not limited to this form. For example, the reinforcing body 9 may be embedded inside the outsole 3 or inside the midsole 4. Alternatively, the upper surface of the reinforcing body 9 may be laminated on the lower surface of the outsole 3. Alternatively, the lower surface of the reinforcing body 9 may be laminated on the upper surface of the midsole 4.

Further, in the second embodiment, the reinforcing body 9 shown in the first embodiment is not provided on the sole body 2, but the present invention is not limited to this embodiment. That is, even in the second embodiment, the reinforcing body 9 can be provided on the sole body 2.

Further, in the second embodiment, the heel support portion 20 configured as one member is provided at a position corresponding to the hind foot portion H of the sole body 2, but the present invention is not limited to this form. For example, a member (not shown) in which the heel support portion 20 is integrally formed with the sole body 2 in advance may be used. That is, in the second embodiment, if there is a difference between the thickness of the hind foot portion H and the thickness of the forefoot portion F in the sole body 2, is the heel support portion 20 configured as a separate member from the sole body 2? It doesn't matter whether or not.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications can be made within the scope of the present disclosure.

Examples of the sole according to the second embodiment described above and the shoe provided with the sole are shown below. Specifically, the foot pressure is measured when one subject wears the test specimens of four shoes, and the load ratio of the part corresponding to the forefoot part of the sole (hereinafter referred to as "load ratio") is determined from the measurement result. After the calculation, a comparative study was conducted for each load ratio. The present disclosure is not limited to these examples.

[Test specimen and measurement conditions]
Table 1 below shows the main configurations of the soles applied to each of the test specimens of the above four shoes used in this measurement, and the thickness of the part corresponding to the forefoot part and the part corresponding to the hindfoot part in each sole. It shows the difference from the thickness of. In addition, Table 2 below shows various conditions for performing this measurement. The sole of each test piece shown in Table 1 is not provided with a structure corresponding to the reinforcing body shown in the first embodiment.

[Calculation method of load ratio]
Next, the method of calculating the load ratio will be described below.

First, based on the foot pressure data obtained by the foot pressure measurement, the position where the toe part (front end of the forefoot part) of the subject's foot abuts on the sole of each test piece (hereinafter referred to as "toe position") and The position where the heel of the wearer's foot (rear end of the hind foot) abuts on the sole of each test piece (hereinafter referred to as "heel position") is specified. Thereby, the distance in the foot length direction (hereinafter referred to as "foot length distance") in the foot of the subject in contact with the sole of each test piece is specified. Then, when the long-distance foot distance is 100%, a position separated from the heel position by 55.8% forward is defined as the position of the rear end of the forefoot portion on the foot of the subject. Thereby, the region of the forefoot portion (hereinafter referred to as "forefoot region") in the foot of the subject in contact with the sole of each test body is specified.

Secondly, the first total value A of the foot pressure applied to the forefoot region and the second total value B of the foot pressure applied to the region from the toe position to the heel position are calculated. Then, the load ratio X (%) of the foot pressure applied to the forefoot region is calculated by the formula represented by “X = (A / B) × 100”. The average value when this measurement is continued for 5 seconds is used as a representative value of the load ratio X (%) on the sole of each test piece.

[Comparison]
The load ratio X (%) of each test piece obtained by the above measurement is shown in Table 1 (see the right column of Table 1) and FIG. With reference to Table 1 and FIG. 11, the test piece No. 1 and No. In 2, the load ratio X is less than 50%. That is, when the difference between the thickness of the portion corresponding to the forefoot portion and the thickness of the portion corresponding to the hindfoot portion of the sole was 4 mm and 6 mm, the foot pressure on the forefoot region of the sole was relatively low. .. On the other hand, the test piece No. 3 and No. In No. 4, the load ratio X is 50% or more. That is, when the difference between the thickness of the portion corresponding to the forefoot portion and the thickness of the portion corresponding to the hindfoot portion of the sole is 8 mm or more, the foot pressure on the forefoot portion region of the sole is relatively high.

According to this comparative study, the sole body is configured so that the difference between the thickness of the portion corresponding to the hindfoot portion and the thickness of the portion corresponding to the forefoot portion is 8 mm or more, so that the sole has a forefoot region. It was found that the foot pressure was relatively high. As a result, in the shoes of the examples (test bodies No. 3 and No. 4), the foot of the subject (wearer) is easily maintained in the forward leaning posture, and the wearer's feeling of pressure on the forefoot is relative. It turned out that it can be enhanced.

The present disclosure can be industrially used as, for example, sports shoes for running and various competitions, soles applied to sneakers for daily use and shoes for rehabilitation, and shoes using the soles.

S: Shoes 1: Sole 2: Sole body 3: Outsole 4: Midsole 7: Lower convex part 8: Upper convex part 9: Reinforcing body 10: Upper 20: Heel support part

Claims (8)

In the sole for shoes
With the sole body
A plurality of lower convex portions arranged at least in the sole body at a position corresponding to the forefoot portion of the wearer's foot, each of which projects toward the lower side of the sole body.
A pair of upper and lower sole bodies are arranged at least at positions corresponding to the forefoot portions of the wearer's feet, and each projectes toward the upper side of the sole body and overlaps with each of the plurality of lower convex portions in a cross-sectional view. With a plurality of upper convex parts,
The sole body is configured such that the rigidity of the portion corresponding to the midfoot portion of the wearer's foot is higher than the rigidity of the portion corresponding to the forefoot portion of the wearer's foot. In the sole according to claim 1,
The sole body is configured so that the value of flexural rigidity at the portion corresponding to the midfoot portion of the wearer's foot is 0.258 Nm / deg or more. In the sole according to claim 1 or 2.
A sole in which the upper surface of the sole body at a position corresponding to the midfoot portion of the wearer's foot is formed substantially flat. In the sole according to any one of claims 1 to 3,
The sole body has an outsole and a midsole arranged on the upper side of the outsole.
The mid sole is a sole configured so that the Young's modulus of the portion corresponding to the midfoot portion of the wearer's foot is 0.75 MPa or more. In the sole according to any one of claims 1 to 4.
A reinforcing body made of a material having a higher rigidity than the sole body is provided at a position corresponding to the midfoot portion of the wearer's foot on the sole body.
The reinforcing body is a sole extending in the foot length direction from a position corresponding to the Rifthran joint of the wearer's foot to a position corresponding to the Chopard joint in the sole body. In the sole for shoes
With the sole body
A plurality of lower convex portions arranged at least in the sole body at a position corresponding to the forefoot portion of the wearer's foot, each of which projects toward the lower side of the sole body.
A pair of upper and lower sole bodies are arranged at least at positions corresponding to the forefoot portions of the wearer's feet, and each projectes toward the upper side of the sole body and overlaps with each of the plurality of lower convex portions in a cross-sectional view. With a plurality of upper convex parts,
The sole body is configured such that the thickness of the portion corresponding to the hind foot portion of the wearer's foot is larger than the thickness of the portion corresponding to the forefoot portion of the wearer's foot. In the sole according to claim 6,
The sole body is configured such that the difference between the thickness of the portion corresponding to the hind foot portion of the wearer's foot and the thickness of the portion corresponding to the forefoot portion of the wearer's foot is 8 mm or more. .. A shoe having the sole according to any one of claims 1 to 7.

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