WO2020261562A1

WO2020261562A1 - Shoe

Info

Publication number: WO2020261562A1
Application number: PCT/JP2019/025932
Authority: WO
Inventors: 舞仲谷; 谷口　憲彦; 正律阪口; 翔高増
Original assignee: 株式会社アシックス
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-30
Also published as: JPWO2020261562A1; EP3981278A4; WO2020261562A9; JP7402230B2; CN114025635A; US20220240620A1; EP3981278A1

Abstract

A shoe 1 comprises an outsole 6 having a ground contact surface, a midsole 4 secured on the outsole 6, and an upper bonded to the midsole 4 along the peripheral edge of the midsole 4, the midsole 4 comprising a bulge section 8 in a position corresponding to an inner-foot-side rear foot section, the bulge section 8 having a bulge length L1 measured in terms of the horizontal distance from the bond 10 between the upper and the midsole 4 to an outer edge 14 of the ground contact surface in a top surface view, and the bulge length L1 being greater than the horizontal length L2 at the rearmost end from the bond 10 between the upper and the midsole 4 to the outer edge 12 of the midsole 4.

Description

shoes

The present invention relates to shoes, and particularly to shoes with improved stability.

Conventionally, shoes used for running and walking are required to have both cushioning properties that absorb the impact at the time of landing and stability at the time of landing. In particular, stability at the time of landing is regarded as important from the viewpoint of suppressing injuries, and if the stability of the shoes is low, the foot tilts too much toward the inner foot at the time of landing, causing so-called overpronation, increasing the possibility of injury. .. Therefore, it is extremely important to suppress overpronation, and as a technique for realizing this, for example, the one described in Patent Document 1 is known.

Japanese Patent No. 5157020

However, the shoes described in Patent Document 1 have a hard buried portion in the midsole and are highly stable, but the feeling of pushing up may be anxious depending on the user's preference. Therefore, there is a need to improve stability by means different from those of Patent Document 1.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide shoes that further enhance stability.

According to a first aspect of the present invention, the midsole comprises an outsole having a ground contact surface, a midsole fixed on the outsole, and an upper coupled to the midsole along the periphery of the midsole. Has a bulge at a position corresponding to the hind foot on the inner foot side, and the bulge is horizontal from the joint between the upper and the midsole to the outer edge of the ground contact surface when viewed from above. It has a bulge length L1 measured at a distance, and the bulge length L1 is longer than the horizontal length L2 from the joint between the upper and the midsole at the rearmost end to the outer edge of the midsole.

A different aspect of the present invention comprises an outsole having a ground plane, a midsole fixed on the outsole, and an upper coupled to the midsole along the periphery of the midsole. A bulge is provided at a position corresponding to the hind foot on the inner foot side, and the bulge is measured by the horizontal distance from the joint between the outsole and the midsole to the outer edge of the ground contact surface when viewed from above. It has a bulge length L1 and the bulge length L1 is longer than the horizontal length L2 at the rearmost end from the joint between the upper and the midsole to the outer edge of the midsole.

It is a top view which shows the skeleton of a foot. It is a side view of the shoe according to an embodiment. It is the bottom view of the shoe by embodiment. A cross-sectional view of a shoe according to an embodiment is shown. A cross-sectional view of a shoe according to an embodiment is shown. A cross-sectional view of a shoe according to an embodiment is shown. It is the schematic sectional drawing of the midsole of the shoe by embodiment. It is the schematic sectional drawing of the midsole of the shoe by embodiment. It is a side view of the shoe according to an embodiment. It is a top view of the outsole and the midsole according to the embodiment. It is a top view of the midsole according to the embodiment. It is a bottom view of the midsole and the outsole according to the embodiment. It is sectional drawing of the shoe by the modification of embodiment. It is sectional drawing of the shoe by the modification of embodiment. It is sectional drawing of the shoe by the modification of embodiment. It is sectional drawing of the shoe by the modification of embodiment. It is sectional drawing of the shoe by the modification of embodiment. It is sectional drawing of the shoe by the modification of embodiment. It is sectional drawing of the shoe by the modification of embodiment. It is sectional drawing of the shoe by 2nd Embodiment. It is sectional drawing of the shoe by the modification of the 2nd Embodiment. It is sectional drawing of the shoe by the modification of the 2nd Embodiment. It is sectional drawing of the shoe by the modification of the 2nd Embodiment.

First, the definitions of terms used in this specification will be described. In the present specification, the terms indicating the direction may be used in the front-rear direction, the width direction, and the vertical direction, and the terms indicating these directions are used when the shoe is placed on a flat surface and the wearer wears the shoe. Indicates the direction seen from the viewpoint of. Therefore, the forward direction means the toe side, and the rear direction means the heel side. In addition, as terms indicating the direction, the inner foot side and the outer foot side may be used, but the inner foot side means the inner side in the width direction of the foot, that is, the side where the vertical arch of the foot is provided, and is the outer side. The foot side means the side opposite to the inner foot side in the width direction.

Further, in the following description, the outer edge of the midsole and the outsole of the shoe may be referred to, but the outer edge of the midsole or the outsole is the outer edge of the projected shape when the midsole or the outsole is viewed from above. Means. Further, in the following description, the outside (direction) or the inside (direction) of the midsole may be referred to. The outside of the midsole means any direction away from the surface of the midsole when the midsole is viewed from above. The inside of the midsole means any direction from the outside of the midsole to the inside of the surface of the midsole when the midsole is viewed from above. Furthermore, in some examples, directions may be described using three-dimensional Cartesian coordinates. In this case, the X-axis extends from the inner foot side toward the outer foot side, the Y-axis extends from the heel side toward the toe side, and the Z-axis extends from the bottom surface side toward the upper side.

Further, before explaining the shoes according to the embodiment, the skeleton of the foot that may be related to the shoes according to the embodiment will be explained with reference to FIG.

FIG. 1 is a top view showing the skeleton of the foot. The foot of the human body is mainly composed of cuneiform bone Ba, cuboid bone Bb, scaphoid bone Bc, talus bone Bd, calcaneus bone Be, metatarsal bone Bf, and phalange bone Bg. The joints of the foot include MP joint Ja, Lisfranc joint Jb, and Chopard joint Jc. The Chopard joint Jc includes a calcaneus cubic joint Jc1 formed by a cuboid bone Bb and a calcaneus Be, and a talus joint Jc2 formed by a scaphoid bone Bc and a talus Bd. The "forefoot portion" of the wearer in the present specification refers to the portion on the anterior side of the MP joint Ja, and refers to 0 to about 30% of the total length of the foot measured from the toe side. The "metatarsal portion" refers to the portion from the MP joint Ja to the Chopard joint Jc, and refers to about 30 to 80% of the total length of the foot measured from the toe side. The "rear foot portion" refers to a portion posterior to the Chopard joint Jc, and refers to about 80 to 100% of the total length of the foot measured from the toe side. Further, in FIG. 1, the center line S indicates the center line of the shoe and extends along the central portion in the foot width direction. The center line S assumes a portion located on a straight line passing through the third metatarsal bone Bf3 of the human body and the medial protrusion Be1 of the calcaneus ridge of the calcaneus Be. FIG. 1 shows the range where the medial process Be1 of the calcaneal ridge is assumed to be located.

FIG. 2 is a side view of the shoe. FIG. 2 is a side view of one shoe as viewed from the inner foot side. As shown in FIG. 2, the shoe 1 includes an upper 2 that mainly covers the instep, a midsole 4 to which the upper 2 is connected, and an outsole 6 that has a ground contact surface that contacts the ground during walking. ing.

The upper 2 has a shape that covers the upper side of the instep. The upper 2 includes an upper main body 2a, a tightening means (tightening structure) 2b of the upper, and a slit 2c extending in the front-rear direction of the upper 2 near the center in the width direction of the upper 2. Further, a tongue 2d is attached to the upper 2. In the present embodiment, the tightening means 2b adopts a structure in which eyelets and shoelaces are combined, but a surface fastener or the like may be used as the tightening means.

The upper body 2a is formed of a mesh material woven from synthetic fibers such as polyester and polyurethane, synthetic leather, and natural leather, and has a shape that covers the instep. The slit 2c is a cushioning portion for adjusting the width of the upper body 2a according to the tightening condition of the shoelace. A plurality of eyelets are provided on both sides of the slit 2c in the width direction. The tongue 2d is exposed from the slit so that the laces do not come into contact with the instep of the wearer when the laces are attached.

FIG. 3 is a bottom view of the shoes. As shown in FIG. 3, the outsole 6 is formed, for example, by molding rubber into a predetermined shape. The outsole 6 is attached to the bottom surface of the midsole 4 so as to cover the bottom surface of the midsole 4 at least partially. The outsole 6 has a ground contact surface that contacts the ground. A predetermined uneven pattern is formed on the surface of the ground contact surface, and the uneven pattern improves the grip.

In the example shown in FIG. 3, the outsole 6 is formed by attaching a plurality of island-shaped portions to predetermined positions on the bottom surface of a predetermined midsole. The ground contact surface is formed by the bottom surfaces of a plurality of island-shaped portions, and the bottom surface of the midsole 4 is exposed between the island-shaped portions. Therefore, in the illustrated example, the ground plane does not form one continuous plane, but is formed by a plurality of planes. The outsole 6 may be formed of a single flat sheet-like member. In this case, the bottom surface of the sheet-like member forms a ground plane.

The midsole 4 plays a role of absorbing impact, and is formed of an impact absorbing material such as foamed EVA, urethane foam, GEL, and cork. The midsole 4 has a planar shape that imitates the projected shape when the foot is viewed from above. The upper surface of the midsole 4 has an uneven shape corresponding to the uneven shape of the sole of the foot. Further, the upper 2 is coupled to the upper surface of the midsole 4. More specifically, the upper 2 is joined along the outer edge of the midsole 4 or slightly along the inside of the midsole 4 than the outer edge. As a means for connecting the upper 2 to the midsole 4, there are a method of sewing the edge of the upper 2 to the midsole 4 or a method of joining using a joining means such as an adhesive. The shape and thickness of the midsole 4 can be appropriately set according to the intended use of the shoe.

4 to 6 show cross-sectional views of shoes. More specifically, FIG. 4 is a cross-sectional view of the 4-4 cross section of FIG. 2, FIG. 5 is a cross-sectional view of the 5-5 cross section of FIG. 2, and FIG. 6 is a cross-sectional view of the 6-6 cross section of FIG. Is. The cross-sectional views of FIGS. 4 to 6 take a cross section in the vicinity of the hind foot portion, and each is a cross-sectional view of the toe side viewed from the heel side. 7 and 8 are schematic cross-sectional views of the midsole, both of which are cross-sectional views of the toe side viewed from the heel side.

As shown in FIGS. 4 to 6, the midsole 4 includes a bulging portion 8 that bulges outward. The bulging portion 8 is formed, for example, by forming the side surface of the midsole 4 into a flare shape that expands outward from the upper side to the lower side. By providing the bulging portion 8, so-called overpronation can be suppressed. In order to maximize the suppression of overpronation, the bulge 8 should be at least in the part corresponding to the hindfoot part on the inner foot side, or only in the part corresponding to the hindfoot part on the inner foot side. It is preferable to provide. Such a bulging portion 8 may be formed of the same material as the portion of the midsole 4 other than the bulging portion 8 and may have the same hardness. Further, the bulging portion 8 may be formed of a material different from the portion other than the bulging portion of the midsole 4, and the hardness may be different between the bulging portion 8 and the portion other than the bulging portion 8. For example, as shown in FIGS. 4 to 6, when the hardness of the bulging portion 8 is H1 and the hardness of the portion other than the bulging portion 8 is H2, H1> H2 can be obtained. With such a configuration, it is possible to suppress the feeling of pushing up while improving the stability. In such a case, it is preferable that the midsole 4 is formed by two-color molding, and the bulging portion 8 and the portion other than the bulging portion 8 are integrally molded. Further, the bulging portion 8 may be manufactured separately from the midsole 4 and joined to each other.

From another point of view, when viewed from above, the bulging portion 8 has the outer edge 12 of the bottom surface of the midsole 4 outside the joint portion 10 with reference to the joint portion 10 between the upper 2 and the midsole 4. It has a shape that is positioned. In the shoe 1 according to the embodiment, the bulging portion 8 is provided only in the portion corresponding to the hind foot portion on the inner foot side. In another aspect, the bulging portion 8 may be provided only on the hind foot portion on the inner foot side and the forefoot portion on the inner foot side. In a further aspect, the bulging portion 8 may be provided only on the hindfoot portion on the inner foot side, the forefoot portion on the inner foot side, and the forefoot portion on the outer foot side. Further, in a further aspect, the bulging portion 8 may be provided in all the portions other than the portion corresponding to the landing region near the heel portion, which will be described later.

Here, the connecting portion 10 between the midsole 4 and the upper 2, which is a criterion for whether or not the bulging portion 8 is provided, may differ depending on the joining method between the midsole 4 and the upper 2. That is, when the midsole 4 and the upper 2 are sewn together, the midsole 4 and the upper 2 come into contact with each other on a surface, and the joint portion 10 has a certain width. In this case, based on the contact point between the midsole 4 and the upper 2, if the outer edge 12 of the bottom surface of the midsole 4 is outside the contact point between the midsole 4 and the upper 2, the midsole 4 has a bulging portion 8. Will have. The upper surface of the midsole 4 (the surface to which the upper 2 is connected) can be regarded as having a substantially flat shape even if it has some irregularities. On the other hand, as shown in FIGS. 4 to 6, the upper 2 has a curved shape that wraps around the instep. Therefore, in the cross sections shown in FIGS. 4 to 6, there is a contact point where the flat midsole 4 and the curved upper 2 are in contact with each other. The bulge 8 is provided on the midsole 4 by shaping the midsole 4 so that the outer edge 12 of the bottom surface of the midsole 4 is located outside the contact with reference to this contact.

The height of the bulging portion 8 may be the same as the height of the midsole 4 (see FIG. 7) or lower than the height of the midsole 4 (see FIG. 8). It should be noted that FIGS. 7 and 8 show a schematic cross section of the midsole for clarification, and particularly exaggerate the angle of the inclined surface. When the height of the bulge 8 and the height of the midsole 4 match, the bulge 8 starts from the joint 10 between the midsole 4 and the upper 2 in the XZ cross section, for example, as shown in FIG. 7A. A shape that combines a horizontal plane extending horizontally along the XY plane toward the outside of the midsole 4 and a vertical plane extending substantially vertically from the edge of the horizontal plane along the YZ plane toward the bottom surface of the midsole 4. It becomes. Further, as shown in FIG. 7B, the bulging portion 8 has a shape formed of a vertical plane extending from the joint portion 10 between the midsole 4 and the upper along the YZ plane toward the bottom surface of the midsole 4. You may. The vertical plane may have an inclination of about ± 3 ° with respect to the vertical direction. Further, as shown in FIG. 8, when the height of the bulging portion 8 and the height of the midsole 4 do not match, the bulging portion 8 is XZ orthogonal to the bulging direction (inner foot direction) of the bulging portion 8. In the cross section, the shape is a combination of a vertical surface extending along the YZ plane toward the bottom surface of the midsole 4 in a substantially vertical direction from the middle in the height direction of the midsole 4.

When the height of the bulging portion 8 is lower than that of the midsole 4, the bulging portion 8 has a shape of bulging toward the outside of the midsole 4 from an arbitrary position in the height direction of the midsole 4. .. For example, in the examples shown in FIGS. 4 to 6, the upper end of the bulge 8 is in the middle in the height direction of the midsole 4, and the bulge 8 extends to the outside of the midsole 4 from the upper end toward the bottom surface of the midsole 4. Has a shape. In this case, it is more preferable that the upper end of the bulging portion 8 is provided near the center in the height direction of the midsole 4.

FIG. 9 is a side view of the shoe. FIG. 9 is a side view of the shoe as viewed from the inner foot side, and a hatch is attached to a portion where a bulging portion is provided. In the example shown in FIG. 9, the bulging portion 8 extends continuously in the front-rear direction from the middle of the midfoot portion to the hindfoot portion. The rear end of the bulging portion 8 is located in the middle of the hind foot portion and is defined so as not to cover the landing area described later. Further, in the example shown in FIG. 9, the height of the bulging portion 8 decreases toward the front. In the illustrated example, the upper side of the bulge 8 is inclined so as to move away from the upper end of the midsole 4 toward the front. In this way, the height of the bulging portion 8 may be changed depending on the site. In this case, the height of the bulging portion in the hind foot portion, which is particularly required to be stable, may be increased and decreased toward the front side. Further, as a modification, the bulging portion 8 may have a discontinuous shape and may have a shape that intermittently extends in the front-rear direction.

Depending on the shape of the midsole 4 and the outsole 6, the outer edge 12 of the midsole 4 may coincide with the outer edge 14 of the outsole 6 having a ground contact surface when viewed from above. Here, the fact that the outer edge 14 of the outsole 6 and the outer edge 12 of the midsole 4 match includes at least the following two patterns.

As the first pattern, the outsole 6 has one sheet shape, and the sheet shape matches the plane shape of the midsole 4, so that the outer edge 14 of the outsole 6 and the midsole 4 are viewed from above. The outer edges 12 of are matched.

As a second pattern, when the outsole 6 is formed by a plurality of island-shaped portions, a part of the outer edge 12 of the midsole 4 should coincide with a part of the outer edge 14 of at least one island-shaped portion. Just do it. FIG. 10 is a top view of the outsole 6 and the midsole 4. In FIG. 10, the outer edge 14 of the outsole 6 is indicated by the alternate long and short dash line, the outer edge 12 of the midsole 4 is indicated by the alternate long and short dash line, and the portion where the

outer edges

12 and 14 of the outsole 6 and the midsole 4 coincide with each other is shown by a solid line. Shown. As shown in FIG. 10, only a part of the outer edge 14 of the island-shaped outsole 6 in the outer direction coincides with a part of the outer edge 12 of the midsole 4.

Further, the horizontal bulge length L1 (L1> 0) of the bulge portion 8 is the outer edge of the midsole 4 from the joint portion 10 of the upper 2 and the midsole 4 in the portion where the bulge portion 8 is not provided. It is longer than the horizontal length L2 (L2 ≧ 0) up to 12. Hereinafter, a detailed description will be given with reference to FIG.

FIG. 11 is a top view of the midsole. The bulge length L1 of the bulge portion 8 is a horizontal distance from the joint portion 10 between the upper 2 and the midsole 4 to the outer edge 14 of the ground contact surface. When the outer edge 14 of the ground contact surface and the outer edge 12 of the midsole 4 coincide with each other as described above, the bulge length L1 of the bulge portion 8 is the coupling between the upper 2 and the midsole 4. It can be rephrased as the distance from the portion 10 to the outer edge 12 of the midsole 4. On the other hand, the horizontal length L2 of the portion where the bulging portion 8 is not provided is the horizontal distance from the joint portion 10 of the upper 2 and the midsole 4 to the outer edge 12 of the midsole 4. The horizontal length L2 may be measured at any portion where the bulging portion 8 is not provided. The bulge length L1 and the horizontal length L2 may change depending on the shape of the midsole 4 and the shape of the joint portion 10. In this case, it is preferable to take the bulge length L1 and the horizontal length L2 at the position where the distance in the horizontal direction is the largest, respectively, and compare them. Further, the horizontal length L3 (L3 ≧ 0) on the outer foot side is the horizontal distance from the joint portion 10 between the upper 2 and the midsole 4 on the outer foot side to the outer edge 14 of the ground contact surface.

Various measuring methods are assumed as the method of measuring the bulging length L1 and the horizontal lengths L2 and L3, but basically both may be measured with the same standard. As an example, the bulge length L1 and the horizontal lengths L2 and L3 can be measured along the YZ plane at the position of the outer edge 12 of the midsole 4. Further, as an example, the bulge length L1 and the horizontal lengths L2 and L3 can be measured along the YZ plane at the position of the coupling portion 10. Further, as an example, an arbitrary point is taken at a position along the center line S in the hind legs, a line is drawn from the point toward the outer edge of the midsole, and the bulge length L1 and the horizontal length L2 are drawn along the line. , L3 may be measured. The bulge length L1 of the bulge portion 8 is larger than the horizontal lengths L2 and L3 from the joint portion 10 of the upper 2 and the midsole 4 of the portion where the bulge portion 8 is not provided to the outer edge 12 of the midsole 4. long.

When the outer edge of the midsole 4 and the outer edge of the outsole 6 do not match, the outer edge 12 of the midsole 4 is on the inner foot side of the outer edge 14 of the ground contact surface, and the outer edge 12 of the midsole 4 However, it may be on the outer foot side of the outer edge 14 of the ground contact surface. In the former case, the bulge length L1 and the horizontal length L2 are set in the horizontal direction from the joint portion 10 between the upper 2 and the midsole 4 to the outer edge 12 of the midsole 4 regardless of the position of the outer edge 14 of the ground contact surface. It may be a distance. Further, in the latter case, the bulge length L1 and the horizontal length L2 are extended from the joint portion 10 between the upper 2 and the midsole 4 to the outer edge 14 of the ground contact surface regardless of the position of the outer edge 12 of the midsole 4. It may be a horizontal distance.

FIG. 12 is a bottom view of the midsole and the outsole. As described above, it is preferable that the bulging portion 8 is not provided in the portion corresponding to the landing region 16 near the heel portion. Therefore, the portion where the bulging portion 8 is not provided is preferably a portion corresponding to the landing region 16 near the heel portion, and the horizontal length L2 is a portion corresponding to the landing region 16 near the heel portion. It is preferable to measure. Further, when the bulging portion 8 is not provided on the outer foot side, the horizontal length L2 may be measured at an arbitrary position on the outer foot side.

The landing area 16 near the heel portion is an area of the bottom surface of the shoe 1 that first comes into contact with the ground when landing from the heel, and can be appropriately set according to the application of the shoe 1. For example, in running shoes, it is known that the thickness of the midsole 4 is gradually reduced toward the heel side in the region posterior to the virtual line VL1 that crosses the vicinity of the calcaneus in the width direction as shown in FIG. .. As a result, the heel side and / or the outer foot side are inclined upward with respect to the horizontal direction in the vicinity of the heel to form an inclined surface (landing area 16). By forming such an inclined surface, the impact at the time of landing is alleviated. On the premise of such a technique, the shoe 1 according to the embodiment does not provide the bulging portion 8 in the portion corresponding to the landing area 16, but provides the bulging portion 8 in the portion other than the portion corresponding to the landing region 16. There is. By not providing the bulging portion 8 in the portion corresponding to the landing area 16, the bulging portion 8 does not interfere with the grounding operation at the time of landing. When the bulging portion 8 is not provided in the landing region 16, the horizontal length L2 is preferably measured at the portion corresponding to the landing region 16, particularly at the rearmost portion on the heel side.

Further, the virtual line defining the landing area 16 may be a virtual line VL2 inclined in the front-rear direction instead of the virtual line VL1 described above. The virtual line VL2 is a virtual line that has the outer foot side more forward and the inner foot side more rearward and is inclined when viewed from above. The inclination angle of the virtual line VL2 can be arbitrarily set, and can be an angle larger than 0 degrees with respect to the virtual line VL1 up to about 45 degrees.

Further, as a structure for defining the landing area, the landing area 16 may be defined not only by inclining the bottom surface of the midsole 4 but also by arranging a plurality of outsoles 6 arranged in an island shape. In this case, for example, the outsole 6 is not formed along the virtual line VL1 or the virtual line VL2, but the outsole 6 is formed in the front-rear direction of the virtual line VL1 or the virtual line VL2. As a result, a line in which the bottom surface of the midsole 4 is exposed can be formed between the outsole 6 along the virtual line VL1 or the virtual line VL2 (see, for example, FIG. 3). This line is a portion where the surface of the midsole 4 is exposed when the shoe 1 is viewed from the bottom, and is more flexible than the portion where the outsole 6 is formed. Therefore, the landing region 16 may be defined as the rear side of this line, and the bulging portion 8 may not be provided in the portion corresponding to the landing region 16 and the bulging portion 8 may be provided in other portions.

Further, it is preferable that the hardness of the midsole at least the portion corresponding to the hind foot portion, particularly the portion located below the calcaneus when worn, is constant. In order to suppress overpronation, it is conceivable to make the hardness near the end of the midsole on the inner foot side higher than the hardness of other parts to prevent the foot from falling to the inner foot side at the time of landing. However, when the midsole has a difference in hardness, there is always a boundary between the high hardness portion and the low hardness portion. If the boundary is positioned so as to overlap the sole of the foot when viewed from above, the high hardness portion gives the wearer a so-called push-up feeling. On the other hand, in the shoes according to the present embodiment, overpronation can be suppressed by the bulging portion, so that overpronation can be suitably suppressed even if the hardness of the midsole is constant.

13 to 19 are cross-sectional views of shoes, and more specifically, are views showing a modified example of the cross-sectional shape of the bulging portion.

In the modified example shown in FIG. 13, the bulging portion 8 extends from the upper surface of the midsole 4 toward the bottom surface in a flare shape, and the inclination angle is gentle at an inflection point provided in the middle of the midsole 4 in the height direction. It extends like a flare. In the modified example shown in FIG. 14, the bulging portion 8 extends from the middle in the height direction of the midsole 4 toward the inner foot side, and extends flare-like from there toward the bottom surface. In the modified example shown in FIG. 15, the bulging portion 8 bulges toward the inner foot side with a curved shape from the middle in the height direction of the midsole 4. In the example shown in FIG. 16, the bulging portion 8 bulges toward the inner foot side with a curved shape from a low position in the height direction of the midsole 4.

In the modified examples shown in FIGS. 17 to 19, in addition to the bulging portion 8, a part of the midsole 4 other than the bulging portion 8 is formed of a high hardness material. In these modifications, the portion continuous with the bulging portion 8 is formed of a high hardness material, and the remaining portion is formed of a low hardness material. In addition, in FIGS. 17 to 19, for clarification, the portion formed of the high hardness material is hatched. In the modified example shown in FIG. 17, the bulging portion 8 has the same shape as the bulging portion shown in FIG. Further, in the example shown in FIG. 17, the bulging portion 8 has a high hardness material portion having a shape symmetrical with respect to the boundary line between the bulging portion 8 and the portion of the midsole 4 other than the bulging portion 8. doing. In the modified example shown in FIG. 18, the bulging portion 8 is formed over the entire length of the midsole 4 in the height direction. This example also has a high hardness material portion having a shape line-symmetrical with the bulging portion 8. In the modified example shown in FIG. 19, the bulging portion 8 is formed over the entire length of the midsole 4 in the height direction and is curved toward the inner foot side. This example also has a high hardness material portion having a shape line-symmetrical with the bulging portion 8. In either case, the high-hardness material portion extends inward of the midsole only to a position where it hardly overlaps the calcaneus when viewed from above. In particular, in the example shown in FIG. 17, the high-hardness material portion extends to a position where it partially overlaps with the calcaneus when viewed from above. However, as shown in the example shown in FIG. 17, even if the high hardness material portion is extended inward of the midsole 4 at a position lower in the height direction of the midsole 4, the feeling of pushing up can be suppressed. Therefore, when the high hardness material portion is extended in the medial direction of the midsole 4, it is preferable to extend only the lower side in the height direction so that only the upper side in the height direction does not overlap with the calcaneus. In this case, for example, it is more preferable to provide the high hardness material portion below the center in the height direction. Further, in order to preferably prevent the feeling of pushing up, it is more preferable that the high hardness material portion does not have a shape that forms an upper corner at a position where it overlaps with the calcaneus. With such a high hardness material portion, the feeling of pushing up can be suppressed. The high hardness material portion does not necessarily have to have a shape line-symmetrical with the bulging portion 8.

As described above, in the shoe according to the embodiment, by providing the bulging portion 8 at the position corresponding to the hind foot portion on the inner foot side, the inner foot side can be firmly supported at the time of landing, and overpronation can be suppressed. This can improve stability. Further, by not providing the bulging portion 8 in the landing region 16, it is possible to prevent the bulging portion 8 from hindering the landing operation.

Next, the second embodiment of the shoe will be described. In the above-described embodiment, the bulging portion is provided on the midsole, but in the second embodiment, the bulging portion is provided on the outsole.

FIG. 20 is a cross-sectional view of the shoe. As shown in FIG. 20, the outsole 22 of the shoe 20 has a winding portion 24, and the bulging portion 26 is formed in the winding portion 24. The winding portion 24 is formed by a peripheral wall that rises upward from the outer edge of the outsole 22. More specifically, the winding portion 24 extends upward from the outer edge of the outsole 22. The winding portion 24 improves the rigidity of the shoe 20. The rigidity of the shoe 20 means bending rigidity or torsional rigidity. The position of the upper end of the winding portion 24 can be appropriately changed according to the use of the shoe 20.

The height of the winding portion 24 may be uniform or may differ depending on the position. For example, when rigidity is required on the toe side, the winding portion 24 may be lowered on the heel side and raised on the toe side, or the height may be changed inside and outside in the width direction.

The bulging portion 26 is formed by forming the side surface of the outsole 22 into a flare shape that expands outward from the upper side to the lower side. The so-called overpronation can also be suppressed by such a bulging portion 26. The winding portion 24 may be formed on the entire circumference of the outsole 22 along the outer edge of the outsole 22, or may be formed only partially along the outer edge of the outsole 22. The bulging portion 26 may be formed on all the winding portions 24 along the outer edge of the outsole 22, or may be formed only on a part thereof. The bulging portion 26 may be provided only on the portion corresponding to the hind foot portion on the inner foot side. In another aspect, the bulging portion 26 may be provided only on the hind foot portion on the inner foot side and the forefoot portion on the inner foot side. In a further aspect, the bulging portion 26 may be provided only on the hindfoot portion on the inner foot side, the forefoot portion on the inner foot side, and the forefoot portion on the outer foot side. Further, in a further aspect, the bulging portion 26 may be provided in all the portions other than the portion corresponding to the landing region near the heel portion.

The height of the bulging portion 26 may be the same as the height of the hoisting portion 24, or may be lower than the hoisting portion 24. As an example, as shown in FIG. 20, the height of the winding portion 24 and the height of the midsole 28 may match, and the height of the bulging portion 26 and the height of the winding portion 24 may match. In this case, the bulging portion 26 has a horizontal plane extending along the XY plane from the upper end of the winding portion 24 toward the outside of the midsole 28 in a YZ cross section orthogonal to the bulging direction of the bulging portion 26, and an end of the horizontal plane. The shape is a combination of a vertical surface extending from the sole 28 toward the bottom surface of the midsole 28 along the YZ plane.

21 to 23 are cross-sectional views of shoes, and are views showing deformation examples of the bulging portion. As shown in FIG. 21, when the height of the winding portion 24 and the height of the midsole 28 match and the height of the bulging portion 26 is lower than the height of the winding portion 24, the bulging portion 26 is the winding portion 24. It has a shape that bulges toward the outside of the winding portion 24 from an arbitrary position in the height direction of. As an example, as shown in FIG. 22, the height of the winding portion 24 may be lower than the height of the midsole 28, and the height of the bulging portion 26 and the height of the winding portion 24 may match. In this case, the bulging portion 26 has a horizontal plane extending along the XY plane from the upper end of the winding portion 24 toward the outside of the midsole 28 in a YZ cross section orthogonal to the bulging direction of the bulging portion 26, and an end of the horizontal plane. The shape is a combination of a vertical surface extending from the sole 22 toward the bottom surface of the outsole 22 substantially along the YZ plane. As shown in FIG. 23, when the height of the winding portion 24 is lower than the height of the midsole 28 and the height of the bulging portion 26 is lower than the height of the winding portion 24, the bulging portion 26 is the winding portion. The shape is such that it bulges outward from the winding portion 24 from an arbitrary position in the height direction of the 24.

Also in the second embodiment, by providing the bulging portion 26, the inner foot side can be firmly supported at the time of landing and overpronation can be suppressed. This can improve stability. Further, by not providing the bulging portion 26 in the landing region, it is possible to prevent the bulging portion 26 from hindering the landing operation.

The embodiment of the present invention has been described above. Each configuration of the embodiment can be appropriately changed without departing from the spirit of the invention described in the claims.

Hereinafter, aspects of the present invention that can be derived from the invention described in the claims will be described.

The first aspect comprises an outsole with a ground contact surface, a midsole fixed on the outsole, and an upper coupled to the midsole along the periphery of the midsole, with the midsole on the inner foot side. A bulge is provided at a position corresponding to the hind foot, and the bulge is measured by the horizontal distance from the joint between the upper and the midsole to the outer edge of the ground contact surface when viewed from above. It has a bulge length L1 and the bulge length L1 is longer than the horizontal length L2 from the joint between the upper and the midsole at the rearmost end to the outer edge of the midsole.

In the second aspect, in the first aspect, the hardness of the midsole is constant at least in the portion supporting the calcaneus.

In the third aspect, in the first or second aspect, the hardness of the bulging portion is higher than the hardness of the portion other than the bulging portion of the midsole.

In the fourth aspect, in any of the first to third aspects, the bulging portion is formed from the joint surface between the midsole and the outsole to the middle in the height direction of the midsole.

In the fifth aspect, in any of the first to fourth aspects, the side surface of the bulging portion on the inner foot side has a shape that moves away from the joint portion toward the ground contact surface.

In the sixth aspect, in any of the first to fifth aspects, the midsole is molded in two colors.

In the seventh aspect, in any of the first to sixth aspects, the bulging portion is formed only on the hindfoot portion on the inner foot side.

In the eighth aspect, in any of the first to sixth aspects, the bulging portion is formed at a position other than the outer periphery of the landing region near the heel portion of the ground contact surface.

A ninth aspect comprises an outsole with a ground contact surface, a midsole fixed on the outsole, and an upper coupled to the midsole along the periphery of the midsole, with the outsole on the inner foot side. A bulge is provided at a position corresponding to the hind foot, and the bulge is measured by the horizontal distance from the joint between the outsole and the midsole to the outer edge of the ground contact surface when viewed from above. It has a protrusion length L1 and the bulge length L1 is longer than the horizontal length L2 from the joint between the upper and the midsole to the outer edge of the midsole at the rearmost end.

The present invention can be used for shoes.

1 shoe, 2 upper, 4 midsole, 6 outsole, 8 bulge, 10 joint, 12,14 outer edge, 16 landing area, 20 shoes, 22 outsole, 26 bulge, 28 midsole

Claims

An outsole with a tread and
With the midsole fixed on the outsole,
With an upper coupled to the midsole along the periphery of the midsole
The midsole is provided with a bulge at a position corresponding to the hind foot on the inner foot side, and the bulge is a ground contact surface from the joint between the upper and the midsole when viewed from above. Has a bulge length L1 measured at a horizontal distance to the outer edge of
The shoe having a bulge length L1 longer than the horizontal length L2 from the joint between the upper and the midsole at the rearmost end to the outer edge of the midsole.
The shoe according to claim 1, wherein the midsole has a constant hardness at least in a portion supporting the calcaneus.
The shoe according to claim 1 or 2, wherein the hardness of the bulging portion is higher than the hardness of the portion of the midsole other than the bulging portion.
The shoe according to any one of claims 1 to 3, wherein the bulging portion is formed from a joint surface between the midsole and the outsole to the middle in the height direction of the midsole.
The shoe according to any one of claims 1 to 4, wherein the side surface of the bulging portion on the inner foot side has a shape that moves away from the joint portion toward the ground contact surface.
The shoe according to claim 3, wherein the midsole is molded in two colors.
The shoe according to any one of claims 1 to 6, wherein the bulging portion is formed only on the hind foot portion on the inner foot side.
The shoe according to any one of claims 1 to 6, wherein the bulging portion is formed at a position other than the outer periphery of the landing region near the heel portion of the ground contact surface.
An outsole with a tread and
With the midsole fixed on the outsole,
With an upper coupled to the midsole along the periphery of the midsole
The outsole is provided with a bulge at a position corresponding to the hind foot on the inner foot side, and the bulge is in contact with the outsole from the joint between the outsole and the midsole when viewed from above. It has a bulge length L1 measured at a horizontal distance to the outer edge of the ground,
The shoe having a bulge length L1 longer than the horizontal length L2 from the joint between the upper and the midsole to the outer edge of the midsole at the rearmost end.