JP2022175847A - soles and shoes - Google Patents

Abstract

To obtain a sole in which the movement of the toes of the foot is hardly inhibited by a plate while securing a function of enhancing thrust force by the plate, and a function of hardly transmitting pushing-up to the foot.SOLUTION: A sole 3 comprises an outsole, a midsole 31, and a plate 4 arranged in a front foot support part R1 and a middle foot support part R2, and having a rigidity higher than that of the midsole 31. The plate 4 is disposed with an opening 40a in a position corresponding to a region straddling at least a proximal phalanx Bg of the second toe and a proximal phalanx Bg of the third toe. The outer edge of the plate 4 includes an inner foot side end edge 40c positioned at an inner foot side from the opening 40a, and an outer foot side end edge 40d positioned at an outer foot side from the opening 40a. In at least one of the inner foot side end edge 40c and the outer foot side end edge 40d, projections 40f projecting so as to be separated from a shoe center axis C in a foot width direction of the sole 3, and recesses 40g recessed so as to come close to the shoe center axis C are alternately formed.SELECTED DRAWING: Figure 1

Description

The present invention relates to soles and shoes with plates.

A sole having a hard plate is known as a conventional shoe sole. The plate has a function of suppressing bending of the shoe and increasing the forward propulsion force by increasing the rigidity of the sole. When running on a paved road, the above functions of the plate can be utilized to the maximum to improve running efficiency.

However, when running on uneven ground, the rider receives irregular push-ups when landing on the uneven terrain. If there is a plate, the push-up tends to be transmitted to the feet via the plate, increasing the burden on the feet. Therefore, considering the case of running on uneven terrain, the plate is required to have a function of not only increasing the propulsive force but also preventing the push-up from being transmitted to the foot. As a plate having such a function, Patent Document 1 describes a technique in which an opening is provided in a portion corresponding to the forefoot portion of the foot.

Japanese Patent Application Publication No. 2018-534028

When going down a slope on an uneven ground, it is necessary to move the toes and perform fine turning movements. However, in the technique described in Patent Document 1, the rigidity of the plate is uniform. Therefore, the plate may not bend with the force to move the toes, that is, the plate may hinder the movement of the toes.

The present invention has been made in view of the above, and while securing the function of increasing the propulsive force of the plate and the function of making it difficult for the thrust to be transmitted to the foot, the movement of the toes is less likely to be hindered by the plate. The purpose is to obtain the sole.

In order to solve the above-described problems and achieve the object, the sole according to the present invention includes a forefoot support part that supports the forefoot part of the foot, a metatarsal support part that supports the metatarsal part of the foot, and a rear foot part. The rear foot support part that supports the foot part is a sole connected in this order from the front, and is composed of an outsole provided with a ground contact surface, a midsole arranged above the outsole, and an upper part of the outsole. and a plate disposed at least on the forefoot support portion and the midfoot support portion and having a hardness higher than that of the midsole. The plate has an opening at a position corresponding to a region straddling at least the proximal phalanx of the second toe and the proximal phalanx of the third toe. The outer edge of the plate includes an inner leg-side edge positioned on the inner foot side of the opening and an outer foot-side edge positioned on the outer foot side of the opening. At least one of the edge on the inner foot side and the edge on the outer foot side has a protrusion projecting away from the center axis of the shoe in the foot width direction of the sole and a recess recessed toward the center axis of the shoe. are formed alternately.

The sole according to the present invention has the effect that the movement of the toes is less likely to be hindered by the plate while ensuring the function of increasing the propulsive force of the plate and the function of making it difficult for the thrust to be transmitted to the foot.

FIG. 1 is a plan view schematically showing a state in which a skeletal model of a foot is superimposed on a shoe according to Embodiment 1 of the present invention. 2 is a side view of the outer leg side of the shoe according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view along line III-III shown in FIG. 4 is a plan view of a plate according to Embodiment 1. FIG. FIG. 5 is a cross-sectional view along line VV shown in FIG. 6 is a plan view of a plate according to a first modification of Embodiment 1. FIG. 7 is a plan view of a plate according to a second modification of Embodiment 1. FIG. 8 is a plan view of a plate according to a third modification of Embodiment 1. FIG. 9 is a plan view of a plate according to a fourth modification of Embodiment 1. FIG. 10 is a plan view of a plate according to a fifth modification of the first embodiment; FIG. 11 is a plan view of a plate according to a sixth modification of Embodiment 1. FIG. 12 is a cross-sectional view taken along line XII-XII shown in FIG. 11. FIG. 13 is a plan view of a plate according to a seventh modification of the first embodiment; FIG. 14 is a cross-sectional view along line XIV-XIV shown in FIG. 13. FIG. 15 is a plan view of a plate according to an eighth modification of the first embodiment; FIG. 16 is a cross-sectional view of a sole according to a ninth modification of the first embodiment; FIG. 17 is a cross-sectional view of a sole according to a tenth modification of the first embodiment; FIG. 18 is a cross-sectional view of a sole according to an eleventh modification of the first embodiment; FIG. 19 is a cross-sectional view of a sole according to a twelfth modification of the first embodiment; FIG. 20 is a cross-sectional view of a sole according to a thirteenth modification of the first embodiment; FIG. 21 is a cross-sectional view of a sole according to a fourteenth modification of Embodiment 1. FIG. 22 is a cross-sectional view of a sole according to a fifteenth modification of the first embodiment; FIG. 23 is a plan view of a sole according to Embodiment 2. FIG. 24 is a plan view of a sole according to Embodiment 3. FIG. 25 is a plan view of a sole according to Embodiment 4. FIG.

Hereinafter, embodiments of soles and shoes according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this Example. In the following description, the same parts are denoted by the same reference numerals, and overlapping descriptions are omitted.

(Embodiment 1)
FIG. 1 is a plan view schematically showing a state in which a skeletal model of a foot is superimposed on a shoe 1 according to Embodiment 1 of the present invention. Each figure including FIG. 1 shows only the shoe 1 for the left foot. Since the shoe 1 has a bilaterally symmetrical structure for the left foot and the right foot, only the left foot shoe 1 will be described in this embodiment, and the description of the right foot shoe 1 will be omitted. In the following description, the direction in which the shoe center axis C, which is a vertical line passing through the center of the sole 3, extends when the shoe 1 is viewed from above is referred to as the front-rear direction. A direction orthogonal to the direction is called a foot width direction.

In addition, in the front-rear direction, the direction from the end of the sole 3 where the part supporting the rear foot is located to the end of the sole 3 where the part supporting the forefoot is located is defined as forward. In the fore-and-aft direction, the direction from the end of the sole 3 where the part supporting the forefoot is located to the end of the sole 3 where the part supporting the rear foot is located is called rearward. called.

In addition, the median side of the foot in the anatomical upright position is referred to as the inner foot side, and the side of the foot opposite to the median side in the anatomical upright position is referred to as the outer foot side. That is, the side closer to the midline in the anatomical upright position is called the inner foot side, and the side farther from the midline in the anatomical upright position is called the outer foot side.

Further, the height direction means a direction orthogonal to both the front-rear direction and the foot width direction, unless otherwise specified. Further, the thickness means the dimension in the thickness direction of the sole 3 unless otherwise specified.

A human foot is mainly composed of a cuneiform bone Ba, a cuboid bone Bb, a navicular bone Bc, a talus Bd, a calcaneus Be, a metatarsal Bf, a proximal phalanx Bg, a middle phalanx Bh, and a distal phalanx Bi. . The joints of the foot include DIP joint Ja, which is a distal interphalangeal joint, PIP joint Jb, which is a proximal interphalangeal joint, MP joint Jc, which is a metatarsophalangeal joint, Lisfranc joint Jd, and Chopard joint Je. be

The forefoot portion of the foot refers to a portion located forward of the MP joint Jc. The midfoot portion of the foot refers to a portion from the MP joint Jc to the Chopard joint Je. The hindfoot portion of the foot refers to a portion located behind the Chopard joint Je.

The sole 3 includes a forefoot support portion R1, which is a portion that supports the forefoot portion of the foot of a wearer of a standard body type, and a middle foot support portion, which is a portion that supports the middle foot portion of the foot of a wearer of a standard body shape. It includes a portion R2 and a rearfoot support portion R3 which is the portion that supports the rearfoot portion of the foot of a wearer of normal build. The forefoot support portion R1, the middle foot support portion R2, and the rear foot support portion R3 are connected in this order from the front of the sole 3 in the front-rear direction.

A first boundary line S1 is defined as a line along the foot width direction passing through a position corresponding to approximately 36% of the longitudinal dimension of the sole 3 from the front end of the sole 3, and the longitudinal dimension of the sole 3 from the front end of the sole 3. A second boundary line S2 is defined as a line along the foot width direction passing through a position corresponding to approximately 70%. The first boundary line S1 is a line generally along the MP joint Jc of a wearer of a standard body type, and the second boundary line S2 is a line generally along the Chopard joint Je of a wearer of a standard body type. be. The forefoot support portion R1 is a portion located forward of the first boundary line S1. The middle foot support portion R2 is a portion located between the first boundary line S1 and the second boundary line S2. The rear leg support portion R3 is a portion located behind the second boundary line S2.

FIG. 2 is a side view of the outer leg side of the shoe 1 according to Embodiment 1. FIG. The shoes 1 are preferably used as trail running shoes, but may also be used as road running shoes, other sports shoes, and walking shoes. A shoe 1 includes an upper 2 and a sole 3.

The upper 2 is positioned above the sole 3 . The upper 2 includes an upper body 20 and a shoe tongue 21. - 特許庁

The upper body 20 covers the instep side of the foot. The top of the upper body 20 is formed with a shoe opening 20a into which the wearer's foot is inserted, and an opening 20b that communicates with the shoe opening 20a and extends forward from the shoe opening 20a. A plurality of lacing parts 20c separated from each other in the front-rear direction are provided on both side edges of the opening 20b in the foot width direction. FIG. 2 shows only the lacing portion 20c provided at the side edge of the opening 20b on the side of the outer leg. A shoelace (not shown) is alternately passed through the lacing portion 20c provided at the outer leg side edge of the opening 20b and the lacing portion 20c provided at the inner leg side edge of the opening 20b.

In the present embodiment, the upper 2 including the shoe tongue 21 and the shoe laces will be described as an example. good too. Alternatively, a hook-and-loop fastener may be used instead of the shoelace to bring the upper body 20 into close contact with the foot. When the upper body 20 is brought into close contact with the foot using a hook-and-loop fastener, the upper body 20 is not provided with the stringing portion 20c.

The shoe tongue 21 is a member for protecting the instep of the wearer's foot. The shoe tongue 21 covers the opening 20b inside the upper body 20 . The shoe tongue 21 is fixed to the upper body 20 by stitching, welding, adhesion, or a combination thereof. Materials for the upper body 20 and the shoe tongue 21 are, for example, woven fabric, knitted fabric, synthetic leather, or resin. In particular, in the shoes 1 that require breathability and lightness, it is preferable to use a double raschel warp knitted fabric woven with polyester threads as the material for the upper body 20 and the shoe tongue 21 . In addition, the materials of the upper body 20 and the shoe tongue 21 are not limited to the illustrated materials.

FIG. 3 is a cross-sectional view along line III-III shown in FIG. The sole 3 is positioned below the upper 2 . The sole 3 covers the sole. The shape of the toe portion of the sole 3 is a so-called toe spring shape that curves upward toward the front. The sole 3 includes an outsole 30 provided with a ground contact surface 30a, a midsole 31 arranged above the outsole 30, and a plate 4. - 特許庁The sole 3 is secured to the upper 2 by stitching, welding, gluing or a combination thereof. The lower surface of the outsole 30 serves as a ground contact surface 30a to be installed on the ground. The midsole 31 is located on the upper surface of the outsole 30 and has cushioning properties. The sole 3 has an insole (not shown) that covers the lower opening of the upper body 20 . The insole is fixed to the upper surface of the midsole 31 by adhesion or welding. Also, the insole is fixed to the lower edge of the upper body 20 by stitching. Note that the sole 3 may have a structure in which the insole is omitted. The shoe 1 may also have an insole. If the shoe 1 is provided with an insole, the insole is placed on the sole 3 inside the upper 2 .

The plate 4 has hardness higher than that of the midsole 31 . For the material of the plate 4, for example, short carbon fiber reinforced material, fiber reinforced resin, non-fiber reinforced resin, and fiber cloth material are used. The flexural modulus of the short carbon fiber reinforcing material used for the plate 4 is desirably 5 Gpa to 15 Gpa. Fiber-reinforced resins are, for example, carbon fiber, glass fiber, aramid fiber, Dyneema fiber, Zylon fiber, and boron fiber. Using a fiber reinforced resin as the material of the plate 4 can increase the rigidity and load bearing effect of the plate 4 . Non-fiber reinforced resins are, for example, polymer resins. The polymer resin is, for example, a thermoplastic polyurethane elastomer (TPU) or a thermoplastic elastomer (TPA). If a non-fiber reinforced resin is used as the material of the plate 4, the rigidity of the plate 4 is lowered, making it easier to move the toes. Textile materials are, for example, knitted or woven fabrics such as polyester fibers and nylon fibers. When the plate 4 is made of fiber material, the impact of landing can be reduced and the weight of the plate 4 can be reduced.

The plate 4 is arranged above the outsole 30 . Plate 4 is arranged between outsole 30 and midsole 31 in this embodiment. As shown in FIG. 1, the plate 4 is arranged from the forefoot support portion R1 to the middle foot support portion R2 in this embodiment. The plate 4 is arranged in the front-rear direction from a position corresponding to the distal phalanx Bi to a position corresponding to the vicinity of the Lisfranc joint Jd. The plate 4 is arranged from a position corresponding to the first toe to a position corresponding to the fifth toe in the width direction of the foot. Although the plate 4 is arranged below the midsole 31 and is not visible in FIG. 1, the plate 4 is illustrated with solid lines and dotted hatching for easy understanding.

The plate 4 is provided with an opening 40a penetrating through the sole 3 in the thickness direction. The planar shape of the opening 40a may be polygonal such as triangular or quadrangular, but preferably has rounded corners as shown in FIG. 1 in order to reduce stress concentration at the corners. The planar view shape of the opening 40a is not limited to the illustrated example, and may be a shape having no corners such as a circle or an ellipse.

The opening 40a is a region straddling the distal phalanx Bi, the middle phalanx Bh, the proximal phalanx Bg and the metatarsal Bf of the second toe and the middle phalanx Bh, the proximal phalanx Bg and the metatarsal Bf of the fourth toe. is provided at a position corresponding to The opening 40a is not limited to the illustrated range, and may be provided at a position corresponding to a region straddling at least the proximal phalanx Bg of the second toe and the proximal phalanx Bg of the third toe. Here, a portion of the sole 3 along the shoe center axis C is called a shoe center. The plate 4 is provided with an opening 40a containing a circle P whose center is located 32% from the front end of the shoe center and whose diameter is 10% of the dimension of the shoe center. That is, the opening 40a should be provided so as to include at least the circle P. As shown in FIG.

The outer edge of the plate 4 includes a front edge 40b positioned in front of the opening 40a, an inner foot edge 40c positioned on the inner foot side of the opening 40a, and a front edge 40c positioned on the outer foot side of the opening 40a. It includes an outer leg side edge 40d and a rear edge 40e located behind the opening 40a. The front edge 40b extends in a curved shape so as to protrude forward. The inner leg-side edge 40c extends rearward from the inner-leg-side end of the front edge 40b. The inner leg side edge 40c extends in a curved shape so as to be convex toward the inner leg side.

The outer leg side edge 40d extends rearward from the outer leg side end of the front edge 40b. Protrusions 40f projecting away from the shoe center axis C in the foot width direction of the sole 3 and recesses 40g recessed toward the shoe center axis C are alternately formed on the outer foot side edge 40d. there is The number of protrusions 40f is not particularly limited, but is three in the present embodiment. The number of recesses 40g is not particularly limited, but is four in this embodiment. One of the plurality of recesses 40g is preferably arranged at a position corresponding to the DIP joint Ja of the fifth toe. In the present embodiment, the second concave portion 40g from the front is arranged at a position corresponding to the DIP joint Ja of the fifth toe. The depth of each recess 40g is less than 20% of the width along the foot width direction of the portion of the plate 4 corresponding to each recess 40g, or from the outer foot side edge 40d toward the inner foot side. It is preferable to make it 8 mm to 10 mm.

The rear edge 40e connects rear ends of the inner leg side edge 40c and the outer leg side edge 40d. The rear edge 40e has an inclined portion 40h that is inclined forward from the outer foot side toward the inner foot side, and a rearward projecting portion that is continuous with the inner foot side end of the inclined portion 40h. A projecting portion 40i is formed. A constricted portion 40j recessed forward is formed at the boundary between the inclined portion 40h and the projecting portion 40i. The rear edge 40e extends from a position corresponding to the metatarsal bone Bf of the fifth toe to a position corresponding to the metatarsal bone Bf of the first toe. The inclined portion 40h is formed from the outer leg side end of the rear edge 40e to the inner leg side of the center in the foot width direction. The inclined portion 40h is arranged from a position corresponding to the metatarsal bone Bf of the fifth toe to a position corresponding to the metatarsal bone Bf of the second toe. The protrusion 40i is formed at the inner leg side end of the rear edge 40e. The protrusion 40i is arranged from a position corresponding to the metatarsal bone Bf of the second toe to a position corresponding to the metatarsal bone Bf of the first toe.

FIG. 4 is a plan view of the plate 4 according to Embodiment 1. FIG. FIG. 5 is a cross-sectional view along line VV shown in FIG. A line along the foot width direction passing through the most forward portion of the opening 40a shown in FIG. This line is the rear boundary line S4. The plate 4 includes a toe region 40k positioned forward of the opening 40a, an inner foot region 40m positioned closer to the inner foot than the opening 40a, and an outer foot side positioned closer to the outer foot than the opening 40a. It has a region 40n and a rear region 40o located behind the opening 40a. The toe region 40k is a region located forward of the front boundary line S3. The inner leg side region 40m is a region positioned between the front boundary line S3 and the rear boundary line S4 on the inner foot side of the opening 40a. The outer leg side region 40n is a region positioned between the front boundary line S3 and the rear boundary line S4 on the outer foot side of the opening 40a. The rear region 40o is a region located behind the rear boundary line S4.

As shown in FIG. 5, the thickness of the plate 4 in the thickness direction of the sole 3 decreases from the rear to the front. Specifically, the plate 4 is formed in an inclined shape that gradually becomes thinner from the rear to the front. The thickness near the trailing edge 40 e is the thickest in the plate 4 . The thickness of the plate 4 near the front edge 40b is the thinnest. The thickness of the outer leg side region 40n is thinner than the thickness near the rear edge 40e and thicker than the thickness near the front edge 40b. Here, the thickness of the toe region 40k, the thickness of the rear region 40o, and the thickness of the outer foot side region 40n in the thickness direction of the sole 3 are defined by It is formed so that b>c>a, where b is the thickness and c is the thickness of the outer leg side region 40n. The thickness a of the toe region 40k, the thickness b of the rear region 40o, and the thickness c of the outer foot side region 40n are obtained by measuring the thickness of three arbitrarily selected points in each region 40k, 40n, and 40o, Means the average thickness obtained by averaging the measured values at three points. The thickness c of the outer foot region 40n is set, for example, to an intermediate thickness between the thickness a of the toe region 40k and the thickness b of the rear region 40o.

Next, the effects of the sole 3 according to this embodiment will be described.

In the present embodiment, as shown in FIGS. 1 and 3, the sole 3 is arranged above the outsole 30 and at least in the forefoot support portion R1 and the middle foot support portion R2, and has a hardness higher than that of the midsole 31. It has a plate 4 with high hardness. As a result, the rigidity of the sole 3 is increased, the bending of the shoe 1 is suppressed, and the forward propulsion force can be increased.

In this embodiment, as shown in FIG. 1, the plate 4 is provided with an opening 40a. As a result, the push-up received when landing on uneven ground is less likely to be transmitted to the foot, and the burden on the foot can be reduced. In particular, since the opening 40a is provided at a position corresponding to the region straddling the proximal phalanx Bg of the second toe and the proximal phalanx Bg of the third toe, where the push-up is most likely to be felt, the wearer is less likely to feel the push-up. . Further, by providing the opening 40a in the plate 4, the weight of the plate 4 can be reduced. By limiting the range of the opening 40a, it is possible to reduce the decrease in rigidity of the sole 3 due to the provision of the opening 40a, and to ensure forward propulsion.

In the present embodiment, as shown in FIG. 1, the outer edge of the plate 4 includes an inner leg-side edge 40c positioned closer to the inner leg than the opening 40a and an outer edge 40c positioned closer to the outer leg than the opening 40a. and a foot edge 40d. In addition, on the outer foot side edge 40d, convex portions 40f that protrude away from the shoe center axis C in the foot width direction of the sole 3 and concave portions 40g that are recessed to approach the shoe center axis C are alternately formed. It is With these configurations, the rigidity of the plate 4 can be partially lowered, and the partial deformation of the plate 4 can be promoted. By providing the concave portion 40g at the position corresponding to the toe, the movement of the toe is less likely to be hindered by the plate 4.例文帳に追加Therefore, when going down a slope on an uneven ground, it becomes easy to move the toes and perform fine turning steps. In addition, the depth of each recess 40g is less than 20% of the width along the foot width direction of the portion of the plate 4 corresponding to each recess 40g, or from the outer leg side edge 40d to the inner leg side By setting the width to 8 mm to 10 mm, it is possible to reduce the deterioration of the rigidity of the sole 3 due to the provision of the concave portion 40g and secure forward propulsion.

In the present embodiment, as shown in FIG. 1, the concave portion 40g is arranged at least at a position corresponding to the DIP joint Ja of the fifth toe, making it easier to move the DIP joint Ja of the fifth toe. Therefore, when going down a slope on uneven ground, etc., it becomes easy to move the DIP joint Ja of the fifth toe and perform a fine turning step.

In the present embodiment, as shown in FIG. 1, the planar shape of the opening 40a is rounded to prevent stress concentration at the edge of the opening 40a, thereby preventing damage to the plate 4. become difficult.

In this embodiment, as shown in FIG. 1, the outer edge of the plate 4 includes a rear edge 40e located behind the opening 40a. An inclined portion 40h is formed so as to be inclined forward. This makes it easier to tilt the foot around the horizontal axis along the front-rear direction. The rear edge 40e is formed with a projection 40i that is continuous with the inner leg side end of the inclined portion 40h and protrudes rearward. A decrease in rigidity can be reduced. Note that the protrusion 40i may be omitted and the inclined portion 40h may be formed over the entire length of the rear edge 40e.

In this embodiment, as shown in FIGS. 4 and 5, the thickness of the plate 4 in the thickness direction of the sole 3 decreases from the rear to the front through the outer foot side, thereby By partially lowering the rigidity of the plate 4 at the position corresponding to the vicinity of the fifth toe, the third to fifth toes can be more easily moved. Also, the weight of the plate 4 can be reduced.

(First modification)
FIG. 6 is a plan view of a plate 4A according to the first modification of the first embodiment. A plate 4A according to the first modification differs from the plate 4 according to the first embodiment in that the number of protrusions 40f is one and the number of recesses 40g is two. In this modified example, the first concave portion 40g from the front is arranged at a position corresponding to the DIP joint Ja of the fifth toe. This modification can also provide the same effects as those of the first embodiment.

(Second modification)
FIG. 7 is a plan view of a plate 4B according to a second modification of the first embodiment. The plate 4B according to the second modified example has one convex portion 40f and two concave portions 40g, and the depth of each concave portion 40g is increased to at least a position corresponding to the fifth toe. This is different from the plate 4 according to the first embodiment. In this modification, the first concave portion 40g from the front is arranged at a position corresponding to the DIP joint Ja of the fifth toe, and the second concave portion 40g from the front corresponds to the MP joint Jc of the fifth toe. placed in position. According to this modified example, the partial deformation of the plate 4B can be further promoted, and the DIP joint Ja and the MP joint Jc of the fifth toe can be easily moved. Therefore, when going down a slope on uneven ground, etc., it becomes easy to move the DIP joint Ja and the MP joint Jc of the fifth toe to perform fine turning steps.

(Third modification)
FIG. 8 is a plan view of a plate 4C according to a third modified example of the first embodiment. A plate 4C according to the third modification differs from the plate 4 according to the first embodiment in that a convex portion 40f and a concave portion 40g are formed on the inner leg side edge 40c. Protrusions 40f projecting away from the shoe center axis C in the foot width direction of the sole 3 and recesses 40g recessed toward the shoe center axis C are alternately formed on the inner foot side edge 40c. there is Although the number of protrusions 40f is not particularly limited, it is one in this modification. Although the number of recesses 40g is not particularly limited, it is two in this modification. At least one of the plurality of recesses 40g is preferably arranged at a position corresponding to the MP joint Jc of the first toe. In this modified example, the second concave portion 40g from the front is arranged at a position corresponding to the MP joint Jc of the first toe. The depth of each recess 40g is less than 20% of the width along the foot width direction of the portion of the plate 4C corresponding to each recess 40g, or from the inner foot side edge 40c toward the outer foot side. It is preferable to make it 8 mm to 10 mm. According to this modification, the deformation of the inner foot side portion of the plate 4C can be promoted, and the MP joint Jc of the first toe can be easily moved. Therefore, when going down a slope on uneven ground, it becomes easy to move the MP joint Jc of the first toe and perform a fine turning step.

(Fourth modification)
FIG. 9 is a plan view of a plate 4D according to the fourth modification of the first embodiment. A plate 4D according to the fourth modification differs from the plate 4 according to Embodiment 1 in that a convex portion 40f and a concave portion 40g are formed on both the outer leg side edge 40d and the inner leg side edge 40c. . The number of protrusions 40f on the outer leg side edge 40d is three in this modification. The number of recesses 40g on the outer leg side edge 40d is four in this modification. The number of protrusions 40f on the inner leg side edge 40c is one in this modification. The number of recesses 40g on the inner leg side edge 40c is two in this modification. According to this modified example, it is possible to promote deformation of both the outer foot side portion and the inner foot side portion of the plate 4D, making it easier to move the first toe and the fifth toe. Therefore, when going down a slope on an uneven ground, it becomes easy to move the first and fifth toes to perform a fine turning step. The convex portion 40f and the concave portion 40g may be formed on at least one of the inner leg side edge 40c and the outer leg side edge 40d.

(Fifth modification)
FIG. 10 is a plan view of a plate 4E according to the fifth modification of the first embodiment. A plate 4E according to the fifth modification differs from the plate 4 according to Embodiment 1 in that it extends from the front foot support portion R1 to the rear foot support portion R3. According to this modification, the rigidity of the sole 3 from the forefoot support portion R1 to the rear foot support portion R3 can be increased to stably support the entire foot.

(Sixth modification)
FIG. 11 is a plan view of a plate 4F according to a sixth modification of the first embodiment. 12 is a cross-sectional view taken along line XII-XII shown in FIG. 11. FIG. A plate 4F according to the sixth modification is different from the plate 4 according to the first embodiment in that the plate 4F is formed in a stepped shape whose thickness gradually decreases from the rear to the front. In FIG. 11, a boundary line S5 is illustrated at a position where the thickness of the plate 4F changes. The thickness of the plate 4F is changed in two stages. A step surface 40p shown in FIG. 12 is formed at a position corresponding to the boundary line S5 shown in FIG. As shown in FIGS. 11 and 12, the region of the plate 4F located in front of the boundary line S5 is thinner than the region located behind the boundary line S5. This modification can also provide the same effects as those of the first embodiment.

(Seventh modification)
FIG. 13 is a plan view of a plate 4G according to the seventh modification of the first embodiment. 14 is a cross-sectional view along line XIV-XIV shown in FIG. 13. FIG. A plate 4G according to the seventh modification differs from the plate 4 according to the first embodiment in that it is formed in a stepped shape that gradually becomes thinner from the rear to the front. In FIG. 13, boundary lines S6 and S7 are illustrated at positions where the thickness of the plate 4G changes. The thickness of the plate 4G is changed in three stages. A step surface 40q shown in FIG. 14 is formed at a position corresponding to the boundary line S6 shown in FIG. A step surface 40r shown in FIG. 14 is formed at a position corresponding to the boundary line S7 shown in FIG. As shown in FIGS. 13 and 14, the thickness of the region located in front of the boundary line S6 in the plate 4G is thinner than the thickness of the region located between the boundary line S6 and the boundary line S7. The thickness of the region located between the boundary line S6 and the boundary line S7 in the plate 4G is thinner than the thickness of the region located behind the boundary line S7. This modification can also provide the same effects as those of the first embodiment.

(Eighth modification)
FIG. 15 is a plan view of a plate 4H according to an eighth modification of the first embodiment. A plate 4H according to the eighth modification differs from the plate 4 according to the first embodiment in that the thickness of the plate 4H decreases from the opening 40a toward the outer edge of the plate 4H. FIG. 15 illustrates boundary lines S8 at positions where the thickness of the plate 4H changes. The thickness of the plate 4H is changed in two stages. The thickness of the plate 4H is formed in a stepped shape that gradually decreases in thickness from the opening 40a toward the outer edge of the plate 4H. A step surface is formed at a position corresponding to the boundary line S8 shown in FIG. The thickness of the region of the plate 4H positioned closer to the outer edge of the plate 4H than the boundary line S8 is thinner than the thickness of the region positioned closer to the opening 40a than the boundary line S8.

It should be noted that the thickness of the plate 4H may be formed in an inclined shape that gradually decreases from the opening 40a toward the outer edge of the plate 4H. In this case, the thickness of the region of the plate 4H positioned closer to the opening 40a than the boundary line S8 is uniform, and the thickness of the region of the plate 4H positioned closer to the outer edge of the plate 4H than the boundary line S8. The thickness is formed in an inclined shape that gradually decreases from the boundary line S8 toward the outer edge of the plate 4H. This modification can also provide the same effects as those of the first embodiment.

(Ninth modification)
FIG. 16 is a cross-sectional view of sole 3A according to the ninth modification of the first embodiment. Although the opening 40a of the plate 4 is omitted in FIG. 16, the opening 40a actually exists. A sole 3A according to the ninth modification is different from the sole 3 according to the first embodiment in that the midsole 31 has a two-layer structure and the plate 4 is arranged inside the midsole 31 . The midsole 31 has a first cushioning member 31a arranged on the outsole 30 and the plate 4, and a second cushioning member 31b arranged between the outsole 30 and the plate 4. . The rigidity of the second cushioning member 31b is lower than the rigidity of the first cushioning member 31a. The plate 4 is arranged between the first buffer member 31a and the second buffer member 31b. According to this modification, the plate 4 is arranged between the first cushioning member 31a and the second cushioning member 31b, so that the impact at the time of landing can be reduced. In addition, according to this modification, since the rigidity of the second cushioning member 31b is lower than the rigidity of the first cushioning member 31a, the second cushioning member 31b is easily deformed at the time of kicking out. The contact area of time expands. As a result, the power of the foot can be stably transmitted to the ground.

(Tenth Modification)
FIG. 17 is a cross-sectional view of sole 3B according to the tenth modification of the first embodiment. Although the opening 40a of the plate 4 is omitted in FIG. 17, the opening 40a actually exists. A sole 3B according to the tenth modification differs from the sole 3 according to Embodiment 1 in that the entire region of the plate 4 is arranged in contact with the lower surface of the midsole 31 and the upper surface of the outsole 30 . According to this modification, a long distance can be secured between the upper surface of the midsole 31 and the plate 4, so that the impact on the forefoot support portion R1 of the sole 3 can be reduced.

(11th modification)
FIG. 18 is a cross-sectional view of sole 3C according to the eleventh modification of the first embodiment. Although the opening 40a of the plate 4 is omitted in FIG. 18, the opening 40a actually exists. A sole 3</b>C according to the eleventh modification differs from the sole 3 according to Embodiment 1 in that the plate 4 is arranged in contact with the upper surface of the midsole 31 over the entire area. According to this modification, the distance between the sole of the wearer's foot and the plate 4 is shortened, so the efficiency of transmitting force from the plate 4 to the foot is increased. As a result, the repulsive force can be obtained efficiently, the forward propulsive force can be improved, and the loss of the force transmitted from the plate 4 to the foot can be reduced.

(Twelfth modification)
FIG. 19 is a cross-sectional view of sole 3D according to the twelfth modification of the first embodiment. Although the opening 40a of the plate 4 is omitted in FIG. 19, the opening 40a actually exists. The sole 3D according to the twelfth modification has the front edge 40b of the plate 4 arranged on the upper surface of the midsole 31, and the portion of the plate 4 other than the front edge 40b arranged inside the midsole 31. This is different from the sole 3 according to the first embodiment. The plate 4 is arranged in contact only with the midsole 31 . That is, the plate 4 is arranged in a non-contact state with the outsole 30 . The plate 4 is warped forward. According to this modification, since the front edge 40b of the plate 4 is arranged on the upper surface of the midsole 31, the warp of the plate 4 approaches the warp of the outsole 30, so that the transition from landing to takeoff is hastened. be able to.

(13th modification)
FIG. 20 is a cross-sectional view of a sole 3E according to the thirteenth modification of the first embodiment. Although the opening 40a of the plate 4 is omitted in FIG. 20, the opening 40a actually exists. The sole 3E according to the thirteenth modification has a front edge 40b of the plate 4 arranged on the upper surface of the midsole 31 and a rear edge 40e of the plate 4 arranged in contact with the upper surface of the outsole 30. and that the portion of the plate 4 other than the front edge 40b and the rear edge 40e is disposed within the midsole 31, which is the difference from the sole 3 according to the first embodiment. The radius of curvature of the plate 4 is smaller than the radius of curvature of the outsole 30 in this modification. According to this modification, the front edge 40b of the plate 4 is arranged on the upper surface of the midsole 31, and the rear edge 40e of the plate 4 is arranged in contact with the upper surface of the outsole 30, so that the plate Since the warp of 4 becomes larger, the transition from landing to take-off can be further accelerated.

(14th modification)
FIG. 21 is a cross-sectional view of a sole 3F according to a fourteenth modification of the first embodiment. Although the opening 40a of the plate 4 is omitted in FIG. 21, the opening 40a actually exists. The sole 3F according to the fourteenth modification differs from the sole 3 according to the first embodiment in that the thickness of the plate 4 is uniform over the entire area and that the thickness of the plate 4 is increased. The thickness of the plate 4 is, for example, 3 mm. According to this modification, the rigidity of the plate 4 as a whole can be increased by making the entire thickness of the plate 4 uniform and thick.

(Fifteenth Modification)
22 is a cross-sectional view of a sole 3G according to a fifteenth modification of the first embodiment. FIG. Although the opening 40a of the plate 4 is omitted in FIG. 22, the opening 40a actually exists. The sole 3G according to the fifteenth modification differs from the sole 3 according to Embodiment 1 in that the thickness of the plate 4 is uniform over the entire area and that the thickness of the plate 4 is reduced. The thickness of plate 4 is, for example, 1.2 mm. According to this modification, the weight of the plate 4 can be reduced by making the entire thickness of the plate 4 uniform and thin.

(Embodiment 2)
23 is a plan view of a sole 3H according to Embodiment 2. FIG. The sole 3H according to the second embodiment differs from the sole 3 according to the first embodiment in that the plate 4I has a first plate 41 and a second plate 42 with different rigidity. In addition, in FIG. 23, the first plate 41 is hatched with oblique lines in order to distinguish between the first plate 41 and the second plate 42 .

The plate 4I has a first plate 41 and a second plate 42 . The first plate 41 is arranged on the outer foot side portion of the plate 4I with respect to the center in the foot width direction. The first plate 41 is arranged at a position corresponding to the third to fifth toe in the thickness direction of the sole 3H. The second plate 42 is arranged on the inner foot side portion of the plate 4I with respect to the center in the foot width direction. The second plate 42 is arranged at a position corresponding to from the first toe to the second toe in the thickness direction of the sole 3H. The first plate 41 and the second plate 42 may be molded integrally, or the first plate 41 and the second plate 42 molded separately may be fixed with an adhesive or the like.

The stiffness of the first plate 41 is lower than the stiffness of the second plate 42 . The first plate 41 is structured to be less stiff than the second plate 42 or is formed of a material that is less stiff than the material of the second plate 42 . As a structure for making the rigidity of the first plate 41 lower than that of the second plate 42, for example, the thickness of the first plate 41 is made thinner than the thickness of the second plate 42, and the thickness of the first plate 41 is reduced. , dimple processing on the second plate 42 , and formation of ribs on the second plate 42 . According to this embodiment, the first plate 41 is arranged at a position corresponding to the third to fifth toe in the thickness direction of the sole 3H, and the rigidity of the first plate 41 is the same as that of the second plate. Being less than 42 stiffness makes it easier to move from toe 3 to 5. Therefore, when descending a slope on an uneven ground, it becomes easy to move the third to fifth toes and perform fine turning steps. Also, the weight of the plate 4I can be reduced.

(Embodiment 3)
24 is a plan view of a sole 3I according to Embodiment 3. FIG. The sole 3I according to Embodiment 3 differs from the sole 3 according to Embodiment 1 in that the plate 4J has a first plate 41 and a second plate 42 having different rigidity. In addition, in FIG. 24, the first plate 41 is hatched with oblique lines in order to distinguish between the first plate 41 and the second plate 42 .

The plate 4J has a plurality of first plates 41 and second plates 42 . The plurality of first plates 41 are separated from each other in the front-rear direction and the foot width direction. The first plates 41 are arranged so as to be scattered all over the plate 4I. The first plate 41 is arranged at a position corresponding to the first to fifth toes in the thickness direction of the sole 3I. The planar view shape of the first plate 41 is circular. The second plate 42 is arranged on a portion of the plate 4J other than the first plate 41. As shown in FIG. The first plate 41 and the second plate 42 may be molded integrally, or the first plate 41 and the second plate 42 molded separately may be fixed with an adhesive or the like.

The stiffness of the first plate 41 is lower than the stiffness of the second plate 42 . The first plate 41 is structured to be less stiff than the second plate 42 or is formed of a material that is less stiff than the material of the second plate 42 . As a structure for making the rigidity of the first plate 41 lower than that of the second plate 42, for example, the thickness of the first plate 41 is made thinner than the thickness of the second plate 42, and the thickness of the first plate 41 is reduced. , dimple processing on the second plate 42 , and formation of ribs on the second plate 42 . According to the present embodiment, the first plate 41 is arranged at positions corresponding to the first to fifth toes in the thickness direction of the sole 3I, and the rigidity of the first plate 41 is greater than that of the second plate 42. , it becomes easier to move the first toe to the fifth toe. Therefore, when going down a slope on an uneven ground, it becomes easy to move the first to fifth toes and perform a fine turning step. Also, the weight of the plate 4J can be reduced.

(Embodiment 4)
FIG. 25 is a plan view of sole 3J according to the fourth embodiment. A sole 3J according to the fourth embodiment differs from the sole 3 according to the first embodiment in that the plate 4K has a first plate 41 and a second plate 42 having different rigidity. In addition, in FIG. 25 , the first plate 41 is hatched with oblique lines in order to distinguish between the first plate 41 and the second plate 42 .

The plate 4K has a first plate 41 and a second plate 42 . The first plate 41 is arranged at a position corresponding to the metatarsal bone Bf of the third toe in the thickness direction of the sole 3J. The rear edge of the first plate 41 forms part of the rear edge 40e. The second plate 42 is arranged on a portion other than the first plate 41 of the plate 4K. The first plate 41 and the second plate 42 may be molded integrally, or the first plate 41 and the second plate 42 molded separately may be fixed with an adhesive or the like.

The stiffness of the first plate 41 is lower than the stiffness of the second plate 42 . The first plate 41 is structured to be less stiff than the second plate 42 or is formed of a material that is less stiff than the material of the second plate 42 . As a structure for making the rigidity of the first plate 41 lower than that of the second plate 42, for example, the thickness of the first plate 41 is made thinner than the thickness of the second plate 42, and the thickness of the first plate 41 is reduced. , dimple processing on the second plate 42 , and formation of ribs on the second plate 42 . According to the present embodiment, the first plate 41 is arranged at a position corresponding to the metatarsal bone Bf of the third toe in the thickness direction of the sole 3J, and the rigidity of the first plate 41 is the same as that of the second plate. By being lower than the rigidity of 42, it becomes easy to move the third toe while sufficiently ensuring the rigidity of the plate 4K. Therefore, when going down a slope on an uneven ground, it becomes easy to move the third toe and perform fine turning steps. Also, the weight of the plate 4K can be reduced.

The configuration shown in the above embodiment shows an example of the content of the present invention, and it is possible to combine it with another known technology, and one configuration can be used without departing from the scope of the present invention. It is also possible to omit or change the part.

1 shoes, 2 upper, 3, 3A, 3B, 3C, 3D, 3E, 3F, 3G, 3H, 3I, 3J sole, 4, 4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4I, 4J , 4K plate, 20 upper body, 20a shoe opening, 20b opening, 20c stringing part, 21 shoe tongue, 30 outsole, 30a ground contact surface, 31 midsole, 31a first cushioning member, 31b second cushioning member, 40a opening 40b front edge 40c inner leg side edge 40d outer leg side edge 40e rear edge 40f convex portion 40g concave portion 40h inclined portion 40i protrusion 40j neck portion 40k toe region 40m Inner foot side region 40n Outer foot side region 40o Rear region 40p, 40q, 40r Step surface 41 First plate 42 Second plate Ba Cuneiform bone Bb Cuboid bone Bc Scaphoid bone Bd Talar , Be calcaneus, Bf metatarsal, Bg proximal phalanx, Bh middle phalanx, Bi distal phalanx, C shoe center axis, Ja DIP joint, Jb PIP joint, Jc MP joint, Jd Lisfranc joint, Je Chopard joint, P Circle, R1 front foot support, R2 middle foot support, R3 rear foot support, S1 first boundary, S2 second boundary, S3 front boundary, S4 rear boundary, S5, S6, S7, S8 boundary .

Claims (10)

The forefoot support part that supports the forefoot part of the foot, the metatarsal support part that supports the midfoot part of the foot, and the rear foot support part that supports the rearfoot part of the foot are connected in this order from the front. hand,
The outsole with a contact surface,
a midsole disposed above the outsole;
a plate disposed above the outsole and at least at the forefoot support portion and the middle foot support portion and having a hardness higher than the hardness of the midsole;
The plate is provided with an opening at a position corresponding to a region straddling at least the proximal phalanx of the second toe and the proximal phalanx of the third toe,
The outer edge of the plate includes an inner leg-side edge located on the inner leg side of the opening and an outer leg-side edge located on the outer leg side of the opening,
At least one of the inner-foot-side edge and the outer-foot-side edge is provided with a protrusion projecting away from the shoe center axis in the foot width direction of the sole and a recess approaching the shoe center axis. A sole formed alternately with recesses. 2. The sole according to claim 1, wherein the recess is located at a position corresponding to at least the distal interphalangeal joint of the fifth toe. The sole according to claim 1 or 2, wherein the opening has a rounded shape in plan view. the outer edge of the plate includes a trailing edge located behind the opening,
The rear edge has an inclined portion that is inclined forward from the outer foot side toward the inner foot side, and a rearward projecting portion that is continuous with the inner foot side end portion of the inclined portion. 4. Sole according to any one of claims 1 to 3, wherein a projection is formed. The forefoot support part that supports the forefoot part of the foot, the metatarsal support part that supports the midfoot part of the foot, and the rear foot support part that supports the rearfoot part of the foot are connected in this order from the front. hand,
The outsole with a contact surface,
a midsole disposed above the outsole;
a plate disposed above the outsole and at least at the forefoot support and the middle foot support, and having a rigidity higher than that of the midsole;
The plate is provided with an opening at a position corresponding to a region straddling at least the proximal phalanx of the second toe and the proximal phalanx of the third toe,
The sole, wherein the thickness of the plate in the thickness direction of the sole tapers from the rear to the front or tapers from the opening toward the outer edge of the plate. The plate has a toe region located in front of the opening, an outer leg region located on the outer leg side of the opening, and a rear region located behind the opening,
The thickness of the toe region, the thickness of the posterior region, and the thickness of the outer leg region in the thickness direction are defined by the thickness of the toe region being a, the thickness of the posterior region being b, and the thickness of the toe region being a. 6. The sole according to claim 5, wherein b>c>a, where c is the thickness of the outer foot region. The forefoot support part that supports the forefoot part of the foot, the metatarsal support part that supports the midfoot part of the foot, and the rear foot support part that supports the rearfoot part of the foot are connected in this order from the front. hand,
The outsole with a contact surface,
a midsole disposed above the outsole;
a plate disposed above the outsole and at least at the forefoot support and the middle foot support, and having a rigidity higher than that of the midsole;
A sole, wherein said plate is provided with an opening to contain a circle whose center is 32% from the front edge of the shoe center and whose diameter is 10% of the dimension of said shoe center. The outer edge of the plate includes an inner leg-side edge located on the inner leg side of the opening and an outer leg-side edge located on the outer leg side of the opening,
At least one of the inner-foot-side edge and the outer-foot-side edge is provided with a protrusion projecting away from the shoe center axis in the foot width direction of the sole and a recess approaching the shoe center axis. 8. Sole according to claim 7, wherein the recesses alternate. 9. Sole according to claim 7 or 8, wherein the thickness of the plate in the thickness direction of the sole tapers from the rear to the front or tapers from the opening towards the outer edge of the plate. A shoe comprising the sole according to any one of claims 1 to 9 and an upper located above the sole.

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