Shoes

Abstract

Provided is a shoe sole and shoe that can reduce the impact on the heel at the time of landing and prevent the collapse of the arch. A shoe sole (10) that forms part of a shoe includes a cushioning portion (210) provided at least in the rearfoot region (R2) to reduce the impact on the heel at the time of landing, and a support portion (220) provided at least in the midfoot region (R3) to have a higher rigidity than the cushioning portion and to support the midfoot of the foot, the support portion (220) being provided in front of the cushioning portion and including a support surface (220a) having a shape extending from one end to the other end in the width direction, the cushioning portion (210) including a concave surface (212) at a height position recessed from the support surface, and a plurality of columnar bodies (214) each having a shape extending from the concave surface to the same height position as the support surface.

Description

Technical Field

[0001] This disclosure relates to a shoe sole and a shoe. Background Technology

[0002] Previously, shoes with structures that cushion the impact on the foot upon landing were known. For example, U.S. Patent Application Publication No. 2015 / 0223560 discloses a midsole comprising a plurality of convex elements. The plurality of convex elements have a shape that extends from a concave surface provided on the surface of the midsole to the surface of the midsole. The plurality of convex elements are formed throughout the entire area of ​​the midsole.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: U.S. Patent Application Publication No. 2015 / 0223560 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In activities such as running, the impact on the heel is particularly significant upon landing, creating a need to mitigate this impact and prevent the collapse of the foot arches (medial and lateral longitudinal arches).

[0008] The purpose of this disclosure is to provide a sole and shoe that can mitigate the impact on the heel upon landing and prevent arch collapse.

[0009] Technical means to solve the problem

[0010] According to one aspect of this disclosure, the sole is a part of a shoe and includes: a cushioning portion disposed at least in a rearfoot region located in the longitudinal direction of the shoe to cushion the impact on the heel upon landing; and a support portion disposed at least in a midfoot region located in the central part in the longitudinal direction of the shoe, having a higher rigidity than the cushioning portion and supporting the midfoot portion of the foot. The support portion is disposed in front of the cushioning portion and includes a support surface having a shape extending from one end to the other in the width direction of the shoe. The cushioning portion includes: a concave surface located at a height recessed from the support surface; and a plurality of columnar bodies, each having a shape extending from the concave surface to the same height as the support surface.

[0011] Furthermore, a shoe according to one aspect of this disclosure includes the sole and an upper connected to and located above the sole.

[0012] The effects of the invention

[0013] According to this disclosure, a sole and shoe can be provided that achieve both mitigating the impact on the heel upon landing and preventing arch collapse. Attached Figure Description

[0014] Figure 1 This is a perspective view of a shoe according to a first embodiment of the present disclosure.

[0015] Figure 2 This is a top view of the shoe sole.

[0016] Figure 3 yes Figure 2 A cross-sectional view of line III-III in the diagram.

[0017] Figure 4 yes Figure 2 A cross-sectional view of line IV-IV in the image.

[0018] Figure 5 This is a top view showing the buffer section and its vicinity.

[0019] Figure 6 yes Figure 5 A cross-sectional view of the VI-VI line.

[0020] Figure 7 This is an enlarged cross-sectional view of the shoe sole.

[0021] Figure 8 This is a top view showing a modified example of a columnar structure.

[0022] Figure 9 This is a top view showing a modified example of a columnar structure.

[0023] Figure 10 It is a three-dimensional diagram showing a deformed example of a columnar body.

[0024] Figure 11 It is a three-dimensional diagram showing a deformed example of a columnar body.

[0025] Figure 12 This is a diagram showing a variation of the buffer zone.

[0026] Figure 13 This is a diagram showing a variation of the buffer zone.

[0027] Figure 14 This is a diagram showing a variation of the buffer zone.

[0028] Figure 15 This is a diagram showing a variation of the buffer zone.

[0029] Figure 16 This is a top view of the cushioning portion of the sole of a shoe according to the second embodiment of this disclosure.

[0030] Explanation of symbols

[0031] 1: Shoes

[0032] 10: Shoe soles

[0033] 20: Shoe upper

[0034] 22: The shoe upper itself

[0035] 24: Midsole

[0036] 100: Outer sole

[0037] 101: Roll-up section

[0038] 200: Midsole

[0039] 201: Top and bottom

[0040] 202: Bottom and Mid-bottom

[0041] 203: Impact Absorption Section

[0042] 210: Buffer section

[0043] 210a: Front end

[0044] 210b: Rear end

[0045] 210c: Inner edge

[0046] 210c1: Anterior lateral edge

[0047] 210c2: Posterior lateral edge

[0048] 210d: Outer edge

[0049] 212: Concave surface

[0050] 212a: Basic surface

[0051] 212b: Inclined surface

[0052] 214: Columnar body

[0053] 214a: Lateral columnar body

[0054] 214b: Inner columnar body

[0055] 214c: Central column

[0056] 220: Support section

[0057] 220a: Support surface

[0058] 222: Inner support section

[0059] A: Area

[0060] A1: Edge

[0061] A2: Outer edge

[0062] AX1, AX2: Axis lines

[0063] CS: Connecting surface

[0064] D: Maximum size

[0065] ES1: First end face

[0066] ES2: Second end face

[0067] HC: Heel Center

[0068] h: Height dimension

[0069] L, g: Size

[0070] L1: First edge line

[0071] L2: Second ridge line

[0072] L3: Third ridge line

[0073] G: Gap

[0074] P: Vertex

[0075] R1: Toe area

[0076] R2: Heel area

[0077] R3: Middle Area

[0078] RP: Rear end

[0079] SC: Centerline

[0080] T: Thickness

[0081] X: Circle Detailed Implementation

[0082] Embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the drawings referred to below, identical or equivalent components are labeled with the same numbers. In the following description, terms such as longitudinal direction, width direction, front, and rear are used. These directional terms indicate the direction viewed from the perspective of a wearer wearing the shoe 1 placed on a flat surface such as the ground. For example, front refers to the toe side, and rear refers to the heel side. Moreover, inner side refers to the side of the foot with the first toe in the width direction, and outer side refers to the side of the foot with the fifth toe in the width direction.

[0083] (First Implementation)

[0084] Figure 1This is a perspective view of a shoe according to a first embodiment of the present disclosure. Figure 2 This is a top view of the shoe sole. Figure 3 yes Figure 2 A cross-sectional view of line III-III in the diagram. Figure 4 yes Figure 2 A cross-sectional view of line IV-IV in the image. Furthermore, Figure 2 The image shows a sole 10 for the left foot, but this sole 10 can also be used for the right foot, in which case it is symmetrical to the sole 10 for the left foot. The shoe 1 of this embodiment is preferably a running shoe, but it can be used as other sports shoes or walking shoes, and its use is not limited.

[0085] like Figure 1 , Figure 3 and Figure 4 As shown, shoe 1 includes a sole 10 and an upper 20.

[0086] The upper 20 is connected to the sole 10, and together they form a space to accommodate the foot. For example... Figure 3 As shown, the upper 20 includes an upper body 22 and a midsole 24. The upper body 22 covers the upper surface of the foot. The midsole 24 is connected to the lower part of the upper body 22, forming the bottom of the upper 20. The midsole 24 is connected to the surface of the sole 10.

[0087] The sole 10 forms part of the shoe 1. The sole 10 is connected to the lower part of the upper 20. The sole 10 includes an outer sole 100 and a midsole 200.

[0088] The outer sole 100 forms the ground contact area. The outer sole 100 includes rubber, etc.

[0089] The midsole 200 is disposed on the outer sole 100. The upper 20 is disposed on the midsole 200. That is, the midsole 200 is disposed between the upper 20 and the outer sole 100.

[0090] The midsole 200 is formed, for example, of a resin-based foam material, which comprises a resin material as a main component and a foaming agent or crosslinking agent as a secondary component. The resin material can be a thermoplastic resin or a thermosetting resin. For example, a thermoplastic resin may be suitable as ethylene vinyl acetate copolymer (EVA). For example, a thermosetting resin may be suitable as polyurethane (PU). Alternatively, the midsole 200 may also be formed of a rubber-based foam material, which comprises a rubber material as a main component and a plasticizer or foaming agent, reinforcing agent, or crosslinking agent as secondary components. For example, butadiene rubber may be suitable as a rubber material. Furthermore, the midsole 200 is not limited to the aforementioned materials and may also be formed of a resin or rubber material having moderate strength and excellent cushioning properties.

[0091] The midsole 200 includes a forefoot region R1, a rearfoot region R2, and a midfoot region R3. The forefoot region R1 is the area located at the front of the shoe 1 along its long side. The rearfoot region R2 is the area located at the rear of the shoe 1 along its long side. The midfoot region R3 is the area located between the forefoot region R1 and the rearfoot region R2.

[0092] The forefoot region R1 is the area covering approximately 0% to 30% of the total length of shoe 1, extending from the forefoot to the rearfoot. The midfoot region R3 is the area covering approximately 30% to 80% of the total length of shoe 1, extending from the forefoot to the rearfoot. The rearfoot region R2 is the area covering approximately 80% to 100% of the total length of shoe 1, extending from the forefoot to the rearfoot.

[0093] like Figure 2 As shown, the midsole 200 includes a cushioning portion 210 and a support portion 220.

[0094] The cushioning portion 210 is a part that mitigates the impact on the heel upon landing. The cushioning portion 210 is provided at least in the rearfoot region R2. In this embodiment, the cushioning portion 210 is provided in the region extending from the rearfoot region R2 to the rear of the midfoot region R3. The cushioning portion 210 is preferably located along the centerline SC of the shoe 1 (see reference). Figure 2 The center line SC is formed in the area less than 50% from the rear end of the shoe 1. In addition, the center line SC is not limited to the center line of the shoe 1, but can also be set as a line corresponding to the straight line connecting the center of the calcaneus of the standard wearer of the shoe 1 and the space between the first toe and the second toe.

[0095] The buffer portion 210 includes a front end portion 210a, a rear end portion 210b, an inner edge portion 210c, and an outer edge portion 210d.

[0096] The front end portion 210a is the part located at the front end along the long side. For example... Figure 2 As shown, the front end 210a is located outside the center line SC in the width direction.

[0097] The rear end portion 210b is the part located at the rear end in the direction of the long side. For example... Figure 2 As shown, the rear end 210b is approximately located on the centerline SC.

[0098] The inner edge portion 210c connects the front end portion 210a and the rear end portion 210b, forming the inner edge portion of the buffer portion 210 in the width direction. The inner edge portion 210c includes a front edge portion 210c1 and a rear edge portion 210c2.

[0099] The front edge portion 210c1 constitutes the front portion of the inner edge portion 210c in the long side direction. The front edge portion 210c1 has a shape that gradually moves inward in the width direction from the front end portion 210a toward the rear end portion 210b. In this embodiment, the front edge portion 210c1 has a shape that curves inward in the width direction. However, the front edge portion 210c1 may also have a shape that curves outward in the width direction, or it may be formed as a straight line.

[0100] The rear edge portion 210c2 constitutes the rear portion of the inner edge portion 210c in the long side direction. The rear edge portion 210c2 has a shape that gradually moves outward in the width direction as it moves toward the rear end portion 210b. In this embodiment, the rear edge portion 210c2 has a shape that curves inward in the width direction. However, the rear edge portion 210c2 may also have a shape that curves outward in the width direction, or it may be formed as a straight line.

[0101] The outer edge 210d connects the front end 210a and the rear end 210b, forming the outer edge of the buffer portion 210 in the width direction.

[0102] The buffer section 210 includes a concave surface 212 and a plurality of columnar bodies 214.

[0103] The concave surface 212 is located at a height level where it is recessed from the surface of the portion surrounding the cushioning portion 210 in the midsole 200 (including the support surface 220a described later). For example... Figure 6 As shown, the concave surface 212 includes a base surface 212a and an inclined surface 212b.

[0104] The base surface 212a is substantially parallel to the surface of the column 214.

[0105] The inclined surface 212b is inclined relative to the base surface 212a. The inclined surface 212b is formed in region A, which includes the inner edge 210c. Figure 5 (The area with the oblique line applied). The inclined surface 212b has a shape such that it gradually approaches the surface of the columnar body 214 as it moves from the edge A1 located within the buffer portion 210 in the region A toward the outer edge A2 of the buffer portion 210. For example, Figure 5 In the cross section of the VI-VI line, such as Figure 6 As shown, the inclined surface 212b has a shape that gradually approaches the surface of the columnar body 214 as it moves from the outer side to the inner side in the width direction. This inclined surface 212b can be as follows: Figure 6 The shape shown can be flat, or it can be formed by bending upwards or downwards. The rear end of region A is located inside the width direction relative to the center line SC.

[0106] Each columnar body 214 has a shape extending from the concave surface 212 to the same height as the supporting surface 220a. The surface of each columnar body 214 is preferably polygonal in plan view, and particularly preferably polygonal in shape with pentagonal or greater features. In this embodiment, each columnar body 214 is formed as a hexagonal column. Furthermore, the corners of the columnar bodies 214 are not strictly angles; they may be rounded or C-shaped.

[0107] The dimension g between a pair of adjacent columnar bodies 214 (refer to) Figure 5 ) is the height dimension h of columnar body 214 (refer to Figure 7 The above. The dimension g is less than the length of each side of the surface of the columnar body 214.

[0108] When viewed from above, the largest dimension D of column 214 in the direction orthogonal to the axis of column 214 (refer to...) Figure 5 The height dimension h of the columnar body 214 is greater than or equal to 0.5 mm. The height dimension h is set to the thickness T of the sole 10 (refer to...). Figure 7 Less than 30% of the total height. Furthermore, the height dimension h refers to the distance from the concave surface 212 to the surface of the columnar body 214.

[0109] The position of the column 214 is set as follows: from the rear end RP of the ground contact surface of the outer sole 100 (refer to...) Figure 5 ), along the center HC of the heel, facing forward, the dimension L along the center line SC of the portion other than the rolled-up portion 101 of the toe in the grounding surface of the outer sole 100 (refer to Figure 2 The circle X centered at 15% to 25% of the position (refer to) Figure 5 Within the circle X, at least a portion of the columnar bodies 214 are arranged. The diameter of the circle X is 40% of the length of the portion between the edge of the grounding surface of the outer sole 100 and the point where it intersects a straight line orthogonal to the heel center HC. In this embodiment, a plurality of columnar bodies 214 are arranged within the circle X. This circle X is located further rearward than the front end of the edge portion A1 in the long side direction. Furthermore, the heel center HC refers to the straight line connecting the center of the calcaneus of a standard wearer of the shoe 1 with the third and fourth toes.

[0110] The support portion 220 has higher rigidity than the cushioning portion 210 and supports the midfoot region of the foot. The support portion 220 is provided at least in the midfoot region R3. Furthermore, the rigidity has essentially the same meaning as the compressive modulus of elasticity in the thickness direction of the sole 10.

[0111] The support portion 220 includes a support surface 220a. The support surface 220a is disposed in front of the cushioning portion 210. Specifically, the support surface 220a forms the surface of the portion in front of the cushioning portion 210 in the midsole 200. That is, the concave surface 212 is located at a height recessed from the support surface 220a. The support surface 220a has a shape that extends from one end to the other in the width direction.

[0112] The support portion 220 includes an inner support portion 222. The inner support portion 222 has a shape that extends inward from the inner edge portion 210c in the width direction. More specifically, the inner support portion 222 has a shape that extends inward from the front edge portion 210c1 in the width direction. The surface of the inner support portion 222 is continuously connected to the support surface 220a.

[0113] The surface of the portion surrounding the cushioning portion 210 in the midsole 200, that is, the surface including the support surface 220a and the inner support portion 222, is bonded to the midsole 24 using an adhesive. On the other hand, the cushioning portion 210 is not bonded to the midsole 24.

[0114] In this embodiment, such as Figure 3 and Figure 4 As shown, the midsole 200 includes a top midsole 201, a bottom midsole 202, and a shock-absorbing portion 203.

[0115] The bottom midsole 202 is set on the outer sole 100.

[0116] The top midsole 201 is connected to the rear surface of the bottom midsole 202. A cushioning portion 210 and an inner support portion 222 are formed on the surface of the top midsole 201. The support portion 220 is formed in a top view (equivalent to...). Figure 2 (The top mid-bottom 201 and the bottom mid-bottom 202 are near the boundary.)

[0117] The shock-absorbing part 203 is the portion that primarily absorbs the impact exerted on the heel upon landing. The shock-absorbing part 203 comprises a material with a lower hardness than the top midsole 201 and the bottom midsole 202. The shock-absorbing part 203 may be, for example, a foamed material or a non-foamed material comprising a polymer composition.

[0118] like Figure 2 As shown, the impact-absorbing portion 203 is disposed around the rear portion of the cushioning portion 210. The impact-absorbing portion 203 is disposed at a position that does not overlap with the cushioning portion 210 in the thickness direction of the sole 10. In other words, when viewed from above, the impact-absorbing portion 203 is separate from the cushioning portion 210. However, the impact-absorbing portion 203 may also be disposed at a position that overlaps with the cushioning portion 210 in the thickness direction.

[0119] As explained above, in the sole 10 of this embodiment, the cushioning portion 210 provided in the rear foot region R2 is used to mitigate the impact on the heel when landing. Furthermore, the support portion 220 of the midfoot portion (non-stepping portion) of the supporting foot includes a support surface 220a. This support surface 220a has a shape that extends from one end to the other in the width direction of the shoe 1, thereby suppressing the collapse of the arch (medial longitudinal arch and lateral longitudinal arch).

[0120] Furthermore, in this embodiment, such as Figure 8 As shown, each columnar body 214 can be formed into a cylindrical shape. Or as... Figure 9 As shown, each columnar body 214 can also be formed into a triangular columnar shape.

[0121] Or such as Figure 10 As shown, each column 214 may also include a cushioning material in the shape of a column. This cushioning material includes a first end face ES1 and a second end face ES2 that are axially opposite each other in the direction extending from the axis AX1, and a plurality of connecting surfaces CS that connect the periphery of the first end face ES1 and the periphery of the second end face ES2, as the outer surface.

[0122] The first end face ES1 has an N-shaped profile when viewed along the axial direction (N is an integer greater than 3). The second end face ES2 has an M-shaped profile when viewed along the axial direction (M is an integer greater than 4 and larger than N).

[0123] At midpoints along the axial direction of the circumferential surface defined by multiple connecting surfaces CS, (MN) vertices P are set. A first edge L1 is set such that it reaches one of the N vertices included in the first end face ES1 from the (MN) vertices P. Two second edges L2 are set such that they reach two adjacent vertices in the circumferential direction from the (MN) vertices P in the M vertices included in the second end face ES2. (2×NM) third edges L3 are set such that they reach the remaining vertices from the N vertices included in the first end face ES1 to the remaining vertices from the M vertices included in the second end face ES2.

[0124] The edges contained in the first edge line L1, the second edge line L2, and the third edge line L3 do not intersect each other, and the multiple connecting surfaces CS are defined by the edges contained in the first edge line L1, the second edge line L2, and the third edge line L3.

[0125] Figure 10In the example shown, the first end face ES1 comprises a plane that is pentagonal in shape when viewed along the axial direction, and the second end face ES2 comprises a plane that is hexagonal in shape when viewed along the axial direction. That is, in this example, N is 5 and M is 6. Moreover, the number of vertices P is 1. The multiple connecting surfaces CS comprise: one surface with a generally triangular shape, three surfaces with a generally quadrilateral shape, and two surfaces with a generally pentagonal shape, for a total of 6 surfaces.

[0126] When a compressive load is applied to the cushioning material along the axial direction, the cushioning material generates not only a stress field from compressive deformation along the axial direction but also a stress field from shear deformation. This is because multiple connecting surfaces CS extend in directions intersecting the axial direction, thus creating a complex stress field due to its external shape. In other words, the principal axis of deformation of the cushioning material is different from the load direction (i.e., the axial direction of the cushioning material), making it particularly prone to shear deformation compared to prismatic or cylindrical cushioning materials.

[0127] Therefore, as shear deformation is more likely to occur, the amount of deformation per unit volume increases accordingly, resulting in high deformation capacity. Thus, by designating each column 214 as the buffer material, a high buffering function is achieved.

[0128] Or such as Figure 11 As shown, each column 214 may also include a buffer structure, which contains buffer units formed by combining multiple buffer materials.

[0129] Multiple cushioning materials include Figure 10 The cushioning material shown. Multiple cushioning materials are arranged adjacent to each other, with the connecting surfaces CS defined by the first edge L1 and the second edge L2 separated by a gap G. The size of each gap G is substantially constant.

[0130] Figure 11 In the example shown, the multiple cushioning materials include two first cushioning materials with a first end face ES1 that is pentagonal and a second end face ES2 that is hexagonal, and two second cushioning materials with a first end face ES1 that is square and a second end face ES2 that is pentagonal, for a total of four cushioning materials. The two first cushioning materials and the two second cushioning materials are arranged alternately to surround the axis AX2 of the cushioning unit, and the orientation of the two first cushioning materials along the axial direction is opposite to that of the two second cushioning materials along the axial direction. Thus, the cushioning unit as a whole presents a roughly hexagonal prism shape.

[0131] In this embodiment, the buffering function provided by the buffer section 210 is improved.

[0132] Moreover, such as Figures 12-15 As shown, the area where the buffer section 210 is formed can be modified in various ways.

[0133] (Second Implementation)

[0134] Next, while referring to Figure 16 The cushioning portion 210 of the sole 10 according to the second embodiment of this disclosure will be described. In the second embodiment, only the parts that are different from those in the first embodiment will be described, and the structures, functions and effects that are the same as those in the first embodiment will not be described again.

[0135] In this embodiment, the buffer portion 210 comprises a plurality of columnar bodies 214, including: three inner columnar bodies 214a arranged along the long side in the inner direction of the width; three outer columnar bodies 214b arranged along the long side in the outer direction of the width; and three central columnar bodies 214c arranged between the inner columnar bodies 214a and the outer columnar bodies 214b, arranged along the long side. The surface of each outer columnar body 214b is triangular when viewed from above. The surface of each central columnar body 214c is approximately pentagonal when viewed from above. A concave surface 212 is provided between the outer columnar bodies 214b and the central columnar bodies 214c. The overall shape of a pair of outer columnar bodies 214b and central columnar bodies 214c that are adjacent to each other in the width direction while holding the concave surface 212 is approximately hexagonal prism-shaped.

[0136] Furthermore, the embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the invention is not defined by the description of the embodiments, but by the scope of the claims, and thus includes all modifications within the same meaning and scope as the claims.

[0137] [Implementation Method]

[0138] Those skilled in the art will understand that the plurality of exemplary embodiments are specific examples of the following embodiments.

[0139] According to one aspect of this disclosure, the sole 10 is a part of the sole of a shoe 1, the sole 10 comprising: a cushioning portion 210, at least disposed in a rear foot region R2 located at the rear of the shoe in the long side direction, for cushioning the impact on the heel upon landing; and a support portion 220, at least disposed in a midfoot region R3 located at the center of the shoe in the long side direction, having a higher rigidity than the cushioning portion and supporting the midfoot portion of the foot, the support portion 220 being disposed in front of the cushioning portion and including a support surface 220a having a shape extending from one end to the other in the width direction of the shoe, the cushioning portion 210 comprising: a concave surface 212 located at a height recessed from the support surface; and a plurality of columnar bodies 214, each having a shape extending from the concave surface to the same height as the support surface.

[0140] In this sole, the cushioning portion 210 provided in the rear foot area is used to mitigate the impact on the heel when landing. Furthermore, the support portion 220 of the midfoot portion (non-stepping portion) of the supporting foot includes a support surface 220a having a shape that extends from one end to the other in the width direction of the shoe 1, thereby suppressing the collapse of the arch (medial longitudinal arch and lateral longitudinal arch).

[0141] Furthermore, when viewed from above, the largest dimension D of the column in the direction orthogonal to the axis of the column is greater than the height dimension h of the column, and the height dimension h of the column is preferably less than 30% of the thickness T of the sole 10.

[0142] In this way, the deformation mode of each column 214 when the load is applied to the buffer section 210 is mainly compression rather than shear, thus effectively achieving a buffering effect.

[0143] Furthermore, the buffer portion 210 preferably includes: a front end portion 210a, located at the front end in the long side direction; a rear end portion 210b, located at the rear end in the long side direction; and an inner edge portion 210c, connecting the front end portion and the rear end portion to form an inner edge portion of the buffer portion in the width direction. The front end portion 210a is located further outward than the center line SC of the sole in the width direction. The support portion 220 includes an inner support portion 222, which has a shape extending from the inner edge portion toward the inner side in the width direction.

[0144] In this way, the relatively less rigid buffer part 210 is located on the outer side in the width direction, and the relatively more rigid support part is located on the inner side in the width direction, thus suppressing inward rotation (pronation) upon landing.

[0145] In this case, the inner edge portion 210c preferably includes a front edge portion 210c1, which has a shape that gradually moves inward toward the inside in the width direction as it moves from the front end portion toward the rear end portion.

[0146] In this embodiment, the buffer portion is gradually replaced by the support portion as it moves inward toward the inside in the width direction, thus suppressing inward rotation (inward spin) upon landing.

[0147] Furthermore, the concave surface 212 preferably includes a base surface 212a and an inclined surface 212b that is inclined relative to the base surface, and the inclined surface has a shape in which it is inclined in such a way that it gradually approaches the surface of the column 214 as it moves from the outside to the inside in the width direction.

[0148] In this embodiment, the rigidity of the buffer portion 210 gradually increases as it moves inward toward the width direction, thus suppressing inward rotation (inward spin) upon landing.

[0149] Furthermore, the dimension g between a pair of adjacent columns is preferably greater than or equal to the height dimension h of the column.

[0150] In this way, when each column 214 undergoes shear deformation, it suppresses interference between each column 214 and the adjacent column.

[0151] Furthermore, the surface of the column 214 is polygonal when viewed from above, and the dimension g between a pair of adjacent columns is preferably smaller than the length of each side of the surface of the column 214.

[0152] In this way, the number of columnar bodies 214 within the forming range of the buffer section 210 is ensured, thus ensuring the buffering function.

[0153] In this case, the surface of the column 214 is preferably formed into a polygonal shape of pentagon or more when viewed from above.

[0154] In this way, the buffering function brought about by the buffer section 210 is improved.

[0155] For example, the columnar body 214 includes a columnar cushioning material. This cushioning material includes a first end face ES1 and a second end face ES2 facing each other in the axial direction extending along the axis AX1, and a plurality of connecting surfaces CS connecting the periphery of the first end face and the periphery of the second end face as outer surfaces. The first end face has an N-shaped shape (N is an integer greater than or equal to 3) when viewed along the axial direction, and the second end face has an M-shaped shape (M is an integer greater than or equal to 4 and greater than N) when viewed along the axial direction. At the midpoint of the axial direction in the peripheral surface defined by the plurality of connecting surfaces, (MN) vertices P are provided to reach from the (MN) vertices provided on the peripheral surface. A first edge L1 is provided at one of the N vertices included in the first end face. Two second edges L2 are provided from the (MN) vertices provided on the circumferential surface to two adjacent vertices in the circumferential direction among the M vertices included in the second end face. And (2×NM) third edges L3 are provided from the remaining vertices of the N vertices included in the first end face to the remaining vertices of the M vertices included in the second end face. The edges included in the first edge, the second edge, and the third edge do not intersect each other, and the multiple connecting surfaces CS can also be defined using the edges included in the first edge, the second edge, and the third edge.

[0156] In this embodiment, the buffering function provided by the buffer section 210 is improved.

[0157] Alternatively, the columnar body 214 may include a buffer structure comprising buffer units formed by combining multiple buffer materials, each of which contains the buffer material. The multiple buffer materials are arranged adjacent to each other in such a way that the connecting surfaces defined by the first edge and the second edge in the multiple connecting surfaces CS they include are separated by a gap G and face each other. The size of the gap G formed between the multiple buffer materials may be substantially constant.

[0158] In this embodiment, the buffering function provided by the buffer section 210 is also improved.

[0159] Furthermore, the shoe 1 according to one aspect of this disclosure includes the sole 10 and an upper 20 connected to and located above the sole.

[0160] Preferably, in the shoe 1, the upper 20 includes a midsole 24 connected to the surface of the sole, the support surface 220a is bonded to the midsole 24, and the cushioning portion 210 is not bonded to the midsole 24.

[0161] In this way, the reduced buffering effect of the buffer section 210 caused by the adhesive entering between the columnar bodies 214 is suppressed.

Claims

1. A shoe comprising a sole and an upper, the sole forming part of the shoe, the upper being connected to and located above the sole, the sole comprising: A cushioning section is provided at least in the rear foot area located in the long side direction of the shoe to mitigate the impact on the heel upon landing; as well as The support portion, at least located in the midfoot region of the shoe in the central part along the long side direction, has higher rigidity than the cushioning portion and supports the midfoot portion of the foot. The support portion is disposed in front of the cushioning portion and includes a support surface having a shape that extends from one end of the shoe in the width direction to the other end. The buffer section includes: The concave surface is located at a height position that is recessed from the support surface; as well as Multiple columnar bodies, each having a shape extending from the concave surface to the same height as the supporting surface. The upper includes a midsole that is connected to the surface of the sole. The support surface is bonded to the midsole. The cushioning section is not bonded to the midsole.

2. The shoe according to claim 1, wherein, in a top view of the column, the largest of the dimensions of the column in a direction orthogonal to the axial direction of the column is greater than the height dimension of the column. The height of the column is less than 30% of the thickness of the sole.

3. The shoe according to claim 1 or 2, wherein the cushioning portion comprises: The front end, located at the front end along the long side; The rear end, located at the rear end along the long side; and The inner edge portion connects the front end portion and the rear end portion, forming the inner edge portion of the buffer portion in the width direction. The front end is located further outward than the centerline of the sole in the width direction. The support portion includes an inner support portion having a shape that extends inward from the inner edge portion toward the width direction.

4. The shoe according to claim 3, wherein the inner edge portion includes a front edge portion having a shape that gradually moves inward toward the inner side in the width direction as it moves from the front end portion toward the rear end portion.

5. The shoe according to claim 1 or 2, wherein the concave surface comprises: Fundamentals; as well as The inclined surface is inclined relative to the base surface. The inclined surface has a shape such that it gradually approaches the surface of the column as it moves from the outside to the inside in the width direction.

6. The shoe according to claim 1 or 2, wherein the dimension between a pair of adjacent columns is greater than or equal to the height dimension of the column.

7. The shoe according to claim 1 or 2, wherein the surface of the columnar body is polygonal when viewed from above. The dimension between adjacent pairs of columns is smaller than the length of each side of the surface of the column.

8. The shoe according to claim 7, wherein the surface of the columnar body is formed into a polygonal shape of more than pentagonal when viewed from above.

9. The shoe according to claim 7, wherein the columnar body comprises a columnar cushioning material, the cushioning material comprising a first end face and a second end face opposite each other in the axial direction, and a plurality of connecting surfaces connecting the periphery of the first end face and the periphery of the second end face, as an outer surface. The first end face, viewed along the axial direction, has an N-shaped profile, where N is an integer greater than or equal to 3. The second end face, viewed along the axial direction, has an M-shaped profile, where M is an integer greater than or equal to 4 and N. At the midpoint of the axial direction within the circumferential surface defined by the plurality of connecting surfaces, MN vertices are set. A first edge is established such that it extends from one of the N vertices on the MN circumferential surface to one of the N vertices on the first end face. Two second edge lines are arranged such that they extend from the MN vertices on the circumferential surface to two adjacent vertices in the circumferential direction among the M vertices included in the second end face. Two × NM third edge lines are set up in such a way that the residual vertices from the N vertices included in the first end face reach the residual vertices from the M vertices included in the second end face. The edges contained in the first edge, the second edge, and the third edge do not intersect each other. The plurality of connecting surfaces are defined by the edges included in the first edge, the second edge, and the third edge.

10. The shoe according to claim 7, wherein the columnar body comprises a cushioning structure, the cushioning structure comprising cushioning units modularized by combining multiple cushioning materials. The plurality of cushioning materials each include a columnar cushioning material, and the cushioning material includes a first end face and a second end face that are opposite each other in the axial direction, and a plurality of connecting surfaces that connect the periphery of the first end face and the periphery of the second end face, as the outer surface. The first end face, viewed along the axial direction, has an N-shaped profile, where N is an integer greater than or equal to 3. The second end face, viewed along the axial direction, has an M-shaped profile, where M is an integer greater than or equal to 4 and N. At the midpoint of the axial direction within the circumferential surface defined by the plurality of connecting surfaces, MN vertices are set. A first edge is established such that it extends from one of the N vertices on the MN circumferential surface to one of the N vertices on the first end face. Two second edge lines are arranged such that they extend from the MN vertices on the circumferential surface to two adjacent vertices in the circumferential direction among the M vertices included in the second end face. Two × NM third edge lines are set up in such a way that the residual vertices from the N vertices included in the first end face reach the residual vertices from the M vertices included in the second end face. The edges contained in the first edge, the second edge, and the third edge do not intersect each other. The plurality of connecting surfaces are defined using the edges included in the first edge, the second edge, and the third edge. The plurality of cushioning materials are arranged adjacent to each other in such a manner that the connecting surfaces defined by the first edge and the second edge, which are included in each other, are spaced apart and face each other. The size of the gaps formed between the plurality of buffer materials is substantially constant.

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