Soles and shoes

Abstract

To provide a sole and shoes that can suppress the occurrence of uneven compression ratios. [Solution] The sole 10 comprises an elastically deformable cushion layer 101, a bottom plate 200 provided below the cushion layer, a top plate 300 provided above the cushion layer, and at least one pin-holding member for holding spike pins. The bottom plate 200 has a plate body 210 and a base portion 220 for holding the pin-holding member. The base portion 220 has an upper surface 220S formed at a position raised from the upper surface 210S of the plate body. The cushion layer 101 has a first region located on the base portion 220 and a second region located on the plate body. The second region includes a receiving space capable of receiving a part of the first region when a vertical compressive load is applied to the cushion layer.

Description

Technical Field

[0001] This disclosure relates to soles and shoes.

Background Art

[0002] Conventionally, shoes with spike pins are known. For example, Japanese Unexamined Patent Application Publication No. 2024-21287 discloses a shoe including a midsole, a bottom plate, a top plate, and a pin holding member. The bottom plate has a plate body and a pedestal portion for holding the pin holding member. The pedestal portion protrudes upward from the upper surface of the plate body. In this shoe, the propulsive force in the forward direction during running or the like is improved by utilizing the repulsive energy generated when the midsole recovers.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the shoe described in Japanese Unexamined Patent Application Publication No. 2024-21287, during running or the like, the compression amount of the portion of the midsole located on the plate body is smaller than the compression amount of the portion of the midsole located on the pedestal portion. In other words, in this shoe, unevenness may occur in the compression rate of the midsole during running or the like. That is, there is room for improvement in increasing the repulsive energy.

[0005] An object of the present disclosure is to provide a sole and a shoe capable of suppressing the occurrence of uneven compression rate.

Means for Solving the Problems

[0006] A sole according to one aspect of this disclosure is a sole constituting part of a shoe, comprising: an elastically deformable cushioning layer; a bottom plate provided below the cushioning layer; a top plate provided above the cushioning layer; and at least one pin-holding member for holding spike pins, wherein the bottom plate has a plate body and at least one base portion for holding the at least one pin-holding member, the at least one base portion having an upper surface located above the upper surface of the plate body, and the cushioning layer having a first region located on the at least one base portion and a second region located on the plate body, the second region including a receiving space capable of receiving a portion of the first region when a vertical compressive load is applied to the cushioning layer.

[0007] Furthermore, a shoe according to one aspect of this disclosure comprises the sole and an upper provided above the sole. [Effects of the Invention]

[0008] This disclosure makes it possible to provide soles and shoes that can suppress the occurrence of uneven compression ratios. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic cross-sectional view showing a shoe in one embodiment of the present disclosure. [Figure 2] This is a perspective view of the sole after disassembly. [Figure 3] This is a view of the bottom of the sole. [Figure 4] Figure 3 shows a cross-sectional view along line IV-IV. [Figure 5] Figure 3 is a cross-sectional view along the VV line. [Figure 6] This diagram schematically shows the cross-sections of the bottom plate, cushioning layer, and top plate. [Figure 7] Figure 6 is a schematic diagram showing the state in which the cushion layer is compressed. [Figure 8]This is a perspective view of a cushioning layer having a structure basically the same as the cushioning layer of the sole shown in Figure 1. [Figure 9] Figure 8 is a perspective view of the unit structure of the cushion layer shown. [Figure 10] This is a perspective view of a cushioning layer having a structure similar to the cushioning layer of the sole shown in Figure 1. [Figure 11] Figure 10 is a perspective view of the unit structure of the cushion layer shown. [Figure 12] This is a perspective view showing a modified cushioning layer. [Modes for carrying out the invention]

[0010] Embodiments of this invention will be described with reference to the drawings. In the drawings referred to below, the same or equivalent components are given the same number.

[0011] Figure 1 is a schematic cross-sectional view of a shoe according to one embodiment of the present disclosure. Figure 2 is an exploded perspective view of the sole. Figure 3 is a bottom view of the sole. Figure 4 is a cross-sectional view taken along line IV-IV in Figure 3. Figure 5 is a cross-sectional view taken along line VV in Figure 3. Although Figures 1 to 3 show the sole 10 for the left foot, this sole 10 can also be applied to the right foot. In this case, the sole for the right foot is formed to be symmetrical to the sole for the left foot, or to be generally similar in shape. The shoe 1 in this embodiment is suitable as a spiked shoe equipped with spike pins, particularly as a spiked shoe for track and field. However, the use of the shoe 1 is not limited to these, and it can also be applied to spiked shoes for ball games such as baseball and soccer.

[0012] In the following explanation, terms such as foot length direction, foot width direction, front, and back are used. These directional terms refer to the direction as seen from the perspective of a wearer wearing shoe 1 placed on a flat surface such as the ground. For example, front refers to the toe side, and back refers to the heel side.

[0013] The longitudinal direction of the foot matches the direction in which the shoe center SC (see FIG. 3) extends. The shoe center SC is a straight line obtained by projecting, along the vertical direction, a straight line connecting the portion between the first and second toes and the central portion of the calcaneus bone (so-called heel center HC) of a standard wearer having a foot of a size suitable for the shoe 1 onto the sole 10 when the standard wearer wears the shoe 1.

[0014] As shown in FIG. 1, the shoe 1 includes a sole 10 and an upper 20.

[0015] The upper 20 is connected to the sole 10 by adhesion or the like. The upper 20 forms an accommodation space for the wearer's foot together with the sole 10. The upper 20 covers the upper surface of the wearer's foot.

[0016] The sole 10 forms part of the shoe 1. The sole 10 is connected to the lower part of the upper 20. As shown in FIGS. 1 and 2, the sole 10 includes a buffer member 100, a bottom plate 200, a top plate 300, a joining member 400, and at least one pin holding member 500 (see FIGS. 4 and 5).

[0017] The buffer member 100 has functions such as a buffering function when grounding and a repulsion function when kicking out. The buffer member 100 is preferably formed of a foamed resin, foamed rubber, resin material, or rubber material that has an appropriate strength and excellent buffering properties. As shown in FIGS. 1 and 2, the buffer member 100 has a cushion layer 101, a fore midsole 102, and a rear midsole 103.

[0018] The cushion layer 101 is elastically deformable. The cushion layer 101 is provided at a position capable of supporting the MP joint (two-dot chain line MP in FIG. 3) of the wearer's foot. Details of the cushion layer 101 will be described later.

[0019] The fore midsole 102 is positioned in front of the cushioning layer 101. The fore midsole 102 supports the wearer's toes and surrounding areas. As shown in Figure 5, a gap is formed between the fore midsole 102 and the cushioning layer 101.

[0020] The rear midsole 103 is positioned behind the cushioning layer 101. The rear midsole 103 supports the heel and surrounding areas of the wearer's foot. As shown in Figure 5, a gap is formed between the rear midsole 103 and the cushioning layer 101.

[0021] The bottom plate 200 is provided below the cushion layer 101. In this embodiment, the bottom plate 200 is connected to the lower surface of the cushioning member 100. The bottom plate 200 is made of a thermoplastic resin or the like. The hardness of the bottom plate 200 is greater than the hardness of the cushioning member 100. The bottom plate 200 has a plate body 210 and at least one base portion 220.

[0022] The plate body 210 is joined to the lower surface of the cushioning member 100. As shown in Figures 2 and 3, the plate body 210 has a first body 211 and a second body 212.

[0023] The first body 211 has a shape that extends from the front end of the cushioning member 100 toward the rear. The first body 211 extends from the front end of the sole 10 to a position corresponding to the wearer's plantar arch. The first body 211 has a shape that curves downward so as to be convex.

[0024] The second body 212 is positioned behind the first body 211. The second body 212 is positioned to overlap with the wearer's heel. As shown in Figure 3, the second body 212 has a shape that includes the central part of the wearer's calcaneus (the so-called heel center HC). The first body 211 and the second body 212 may be formed to be integrally connected.

[0025] The base portion 220 holds the pin holding member 500. The pin holding member 500 is capable of holding a spike pin (not shown). Examples of the pin holding member 500 include nuts. In this embodiment, at least one base portion 220 includes a plurality of base portions 220. Each base portion 220 has a shape that surrounds the pin holding member 500. Each base portion 220 is integrally formed with the plate body 210. Each base portion 220 protrudes from the plate body 210. As shown in Figures 2, 4, and 5, the base portion 220 has an upper surface 220S formed at a position that protrudes from the upper surface 210S of the plate body 210. In other words, the base portion 220 protrudes above the upper surface 210S of the plate body 210 that surrounds the base portion 220.

[0026] Furthermore, because the first body 211 of the plate body 210 is curved so as to be convex downwards, when the sole 10 is placed on a flat surface such as the ground, the upper surface 210S of the plate body 210 includes a portion that is higher than the upper surface 220S of the base portion 220, as shown in Figure 5.

[0027] The lower surface of the base portion 220 may be formed on substantially the same plane as the curved surface including the lower surface of the plate body 210, or it may protrude downward from the curved surface including the lower surface of the plate body 210.

[0028] As shown in Figures 4 and 5, the multiple base portions 220 include a support base portion 222. The support base portion 222 supports at least a portion of the lower wall portion 110 of the cushion layer 101, which will be described later.

[0029] The top plate 300 is provided above the cushioning layer 101. In this embodiment, the top plate 300 is connected to the upper surface of the cushioning member 100. Specifically, the top plate 300 is connected to the upper surfaces of each upper wall portion 120 of the cushioning layer 101 (described later), the upper surface of the fore midsole 102, and the upper surface of the rear midsole 103. The top plate 300 extends from the front of the fore midsole 102 to the rear of the rear midsole 103.

[0030] The joining member 400 is provided between the top plate 300 and the upper 20, and has the function of joining the upper 20 to the top plate 300. The joining member 400 has a shape that is roughly corresponding to the top plate 300.

[0031] Here, the cushion layer 101 will be described. The material of the cushion layer 101 can be basically any material as long as it has appropriate elasticity, but it is preferably a resin material or a rubber material. More specifically, if the cushion layer 101 is made of resin, the material of the cushion layer 101 can be, for example, polyolefin resin, ethylene-vinyl acetate copolymer (EVA), polyamide thermoplastic elastomer (TPA, TPAE), thermoplastic polyurethane (TPU), or polyester thermoplastic elastomer (TPEE). On the other hand, if the cushion layer 101 is made of rubber, the material of the cushion layer 101 can be, for example, butadiene rubber.

[0032] The method for manufacturing the cushion layer 101 is not particularly limited. The cushion layer 101 can be manufactured, for example, by injection molding, casting, or sheet molding using a mold, or by fabrication using a three-dimensional additive manufacturing device. In particular, since the shape of the cushion layer 101 is relatively simple, it can be easily manufactured by molding using a mold, eliminating the need for fabrication using a three-dimensional additive manufacturing device or molding using complex molds, which can lead to a significant reduction in manufacturing costs.

[0033] As shown in Figure 2, both ends of the cushioning layer 101 in the width direction of the foot reach the medial and lateral sides of the sole 10. The cushioning layer 101 has a shape that opens up a receiving space S in the width direction of the sole 10.

[0034] As shown in Figures 4 and 5, the cushion layer 101 has a first region R1 located on the base portion 220 and a second region R2 located on the plate body 210. The second region R2 includes a receiving space S that can receive a portion of the first region R1 when a vertical compressive load is applied to the cushion layer 101 (for example, when it is in contact with the ground). The cushion layer 101 is integrally formed from the same material, but in order to make it easier to distinguish between the first region R1 and the second region R2, the first region R1 is shown with a dot pattern in Figures 4 and 6.

[0035] As shown in Figures 4 and 5, the cushion layer 101 has a plurality of lower wall portions 110, a plurality of upper wall portions 120, and a plurality of vertical wall portions 130.

[0036] Each lower wall portion 110 is in contact with the upper surface 210S of the plate body 210 or the upper surface 220S of the base portion 220. As shown in Figures 4 and 5, the plurality of lower wall portions 110 include at least one intermediate lower wall portion 112. In this embodiment, at least one intermediate lower wall portion 112 includes a plurality of intermediate lower wall portions 112. Each intermediate lower wall portion 112 is positioned between a pair of adjacent base portions 220. Each intermediate lower wall portion 112 is in contact with the upper surface 210S of the plate body 210.

[0037] Each upper wall portion 120 is formed above the multiple lower wall portions 110. The upper surface of the upper wall portion 120 is in contact with the lower surface of the top plate 300.

[0038] Each vertical wall section 130 connects the lower wall section 110 and the upper wall section 120. Each vertical wall section 130, which connects to the common upper wall section 120, is formed in such a shape that it approaches each other as it moves from the lower wall section 110 towards the upper wall section 120. As shown in Figure 6, the length D between a pair of opposing vertical wall sections 130 may be 0.5 mm or more, 0.6 mm or more, or 0.7 mm or more. Note that the length D between a pair of vertical wall sections 130 refers to the length between the midpoints of the two sides formed when the pair of opposing vertical wall sections 130 intersect with the lower wall section 110.

[0039] In this embodiment, the second region R2 includes a pair of adjacent vertical wall portions 130, and a receiving space S is formed between the pair of vertical wall portions 130.

[0040] Figure 6 schematically shows the cross-sections of the bottom plate, cushion layer, and top plate. Figure 7 schematically shows the state in which the cushion layer is compressed from Figure 6. As shown in Figures 6 and 7, when a vertical compressive load is applied to the cushion layer 101, a part of the first region R1 (for example, a part of the vertical wall 130) enters the receiving space S of the second region R2, making it easier for the cushion layer 101 to be compressed uniformly as a whole. If there is no receiving space S, when a vertical compressive load is applied to the cushion layer 101, the compressive force is unevenly distributed in the first region R1, making it difficult for the cushion layer 101 to be compressed uniformly as a whole, and making it difficult to obtain a rebound force as a whole.

[0041] As shown in Figure 2, unlike the fore midsole 102 and rear midsole 103, the cushioning layer 101 is composed of a three-dimensional structure with multiple recesses and protrusions. This three-dimensional structure will now be described.

[0042] Figure 8 is a perspective view of a cushioning layer 101A having a structure basically the same as the cushioning layer 101 of the sole shown in Figure 1. Figure 9 is a perspective view of a unit structure 101U of the cushioning layer 101A shown in Figure 8.

[0043] As shown in Figure 8, the cushion layer 101A includes a three-dimensional structure 101S having a plurality of unit structures 101U arranged adjacent to each other. Each of the plurality of unit structures 101U has a three-dimensional shape formed by walls 101W whose outer shape is defined by a pair of parallel planes (see Figure 9), and thus the three-dimensional structure 101S also has a three-dimensional shape formed by walls 101W whose outer shape is defined by a pair of parallel planes.

[0044] The unit structure 101U has a structure based on a geometric planar structural unit with added thickness. More specifically, the unit structure 101U is constructed by dividing a structural unit consisting of multiple planes arranged intersectingly so as to have a cavity inside, in one of its three orthogonal axis directions, into two, and then adding thickness to each of these two divisions.

[0045] In the unit structure 101U shown in Figure 9, the aforementioned surface structure is a Kelvin structure, and the unit structure 101U is composed of a Kelvin structure unit that has been divided into two in the height direction (Z-axis direction shown in the figure) among the three orthogonal axes, and then further thickened.

[0046] More specifically, the unit structure 101U includes one upper wall section 120, four divided lower wall sections 110, and four vertical wall sections 130 that individually connect these upper wall section 120 and lower wall section 110. Each of the vertical wall sections 130 extends so as to intersect with the upper wall section 120 and lower wall section 110, and connects with adjacent vertical wall sections 130 at their side ends. As a result, the four vertical wall sections 130 form an annular shape as a whole. Each of these upper wall section 120, lower wall section 110, and vertical wall sections 130 has a flat plate shape. That is, the lower wall section 110, upper wall section 120, and vertical wall sections 130 form a three-dimensional shape that defines the receiving space S.

[0047] The four divided lower wall sections 110 are integrated by being continuous with the lower wall sections 110 included in other unit structures 101U that are arranged adjacent to the unit structure 101U containing them. As a result, in the three-dimensional structure 101S, the lower wall sections 110 included in each of these four adjacent unit structures 101U are continuous with each other, thereby forming a single lower wall section 110 that has substantially the same shape as the single upper wall section 120 described above.

[0048] The cushion layer 101A is designed to provide a cushioning function in the height direction as described above. Therefore, as shown in Figure 8, the multiple unit structures 101U are arranged regularly and continuously in repeated patterns along the width direction (X direction in the figure) and depth direction (Y direction in the figure) of the three orthogonal axes. As a result, when viewed from above, the three-dimensional structure 101S has a structure in which upwardly convex and downwardly convex portions are arranged alternately. Note that in Figure 8, three adjacent unit structures 101U in the width direction and depth direction are shown separately.

[0049] In the cushion layer 101A constructed in this manner, compressive deformation occurs when a load is applied along its height direction (the Z-axis direction shown in the figure). At that time, due to its structure, buckling occurs in the vertical wall portion 130 of the cushion layer 101A. When the aforementioned load is removed, the buckling in the vertical wall portion 130 is also resolved, and the cushion layer 101A returns to its original shape.

[0050] As shown in Figures 1 to 5, the cushion layer 101 provided on the sole 10 in this embodiment maintains the basic structure of the cushion layer 101A described above, but slightly deforms the shape and thickness of the unit structure 101U in each part in order to provide the cushion layer 101 on the sole 10, and in other respects it has the same configuration as the cushion layer 101A described above.

[0051] As a result, the unit structure of the cushion layer 101 provided by the sole 10 in this embodiment is also made by dividing a Kelvin structural unit in the height direction (Z-axis direction shown in the figure) among the three orthogonal axes and then adding thickness to it. Thus, the cushion layer 101 is made up of a three-dimensional structure in which multiple of these unit structures are arranged repeatedly adjacent to each other.

[0052] Here, the cushion layer 101 described above is composed of a unit structure 101U which is made by dividing a Kelvin structure structural unit in the height direction into two and then adding thickness to each. However, other planar structural units may be used instead of the Kelvin structure structural units. For example, in the case of a cushion material having a three-dimensional shape formed by a wall whose outer shape is defined by a pair of parallel planes, similar to the cushion layer 101 described above, structural units such as octet structures, cubic structures, and cubic-octet structures can be used in addition to the Kelvin structure.

[0053] These planar structural units consist of multiple planes arranged intersecting each other, each containing a cavity inside. By dividing these units in two in any of the three orthogonal axis directions and then adding thickness to each, a cushioning layer can be formed that provides not only high cushioning performance but also high rebound performance.

[0054] Furthermore, Figure 10 is a perspective view of a cushion layer 101B having a structure similar to the cushion layer 101 provided in the sole of this embodiment, and Figure 11 is a perspective view of the unit structure 101U of the cushion layer 101B. Herein, in the sole 10 of this embodiment, instead of the cushion layer 101 described above, a cushion layer 101B as shown in Figure 10 may be provided as the cushion layer 101. The cushion layer 101B having a structure similar to the cushion layer 101 provided in the sole 10 of this embodiment will be described below with reference to Figures 10 and 11.

[0055] The cushion layer 101 shown in Figure 10 has a structure in which the structural unit 101U is based on a geometric surface structure with added thickness. More specifically, the unit structure 101U is constructed by dividing a mathematically defined triple periodic minimal surface structural unit in one of its three orthogonal axis directions into two parts and then adding thickness to each part. A minimal surface is defined as the surface with the smallest area among surfaces bounded by a given closed curve.

[0056] In the unit structure 101U shown in Figure 10, the aforementioned surface structure is a Schwarz P structure, and the unit structure 101U is constructed by dividing a structural unit of the Schwarz P structure in two in the height direction (Z-axis direction shown in the figure) among the three orthogonal axes, and then adding thickness to each division.

[0057] In the cushion layer 101B constructed in this manner, as with the cushion layer 101A described above, compressive deformation occurs when a load is applied along its height direction (the Z-axis direction shown in the figure). In this case, due to its structure, buckling occurs in the vertical wall portion 130 of the cushion layer 101B. When the application of the load described above is removed, the buckling in the vertical wall portion 130 is also resolved, and the cushion layer 101B returns to its original shape.

[0058] Therefore, even if the cushioning layer 101 of the sole 10 in this embodiment is replaced with a cushioning layer 101B that has basically the same structure as the cushioning layer 101A described above, buckling will occur in the cushioning layer 101 upon landing. Consequently, the cushioning layer 101 in the part that supports the MP joint of the wearer's foot will not only have high cushioning performance but also high rebound performance.

[0059] Furthermore, instead of the Schwartz P structure structural units described above, other triple-periodic minimal surface structural units may be used. Other triple-periodic minimal surface structural units that can be used include gyroid structures and Schwartz D structures. By dividing these structural units in two in any of the three orthogonal axis directions and then adding thickness to them, a cushioning material can be constructed that provides not only high cushioning performance but also high rebound performance.

[0060] As described above, in the sole 10 of this embodiment, since the second region R2 includes the receiving space S, when a vertical compressive load is applied to the cushion layer 101, a part of the first region R1 (for example, a part of the vertical wall portion 130) enters the second region R2, causing the cushion layer 101 to be compressed substantially uniformly as a whole. Therefore, the occurrence of unevenness in the compression ratio in the cushion layer 101 is suppressed. As a result, the rebound energy generated when the cushion layer 101 recovers (for example, when pushing off during running) is effectively increased.

[0061] Alternatively, instead of the cushion layer 101 described above, a cushion layer 101 having a grid structure may be used, as shown in Figure 12. The grid structure has a structure that includes multiple linear elements (edges) and intersections (nodes) where the linear elements intersect. Between the linear elements there is a space corresponding to the receiving space S in the cushion layer 101 described above. Therefore, when a vertical compressive load is applied to the cushion layer 101 having a grid structure, the linear elements can enter the receiving space S, making it easier for the cushion layer 101 as a whole to be compressed uniformly.

[0062] In the above description, we described an embodiment in which the receiving space S is a cavity (filled with gas), but the receiving space S may contain a substance other than gas, to the extent that it can accept a portion of the first region when a vertical compressive load is applied to the cushion layer 101. Specifically, the receiving space S may be filled with a material that is more easily deformable than the material constituting the unit structure 101U or the lattice structure.

[0063] Those skilled in the art will understand that the exemplary embodiments described above are specific examples of the embodiments described below.

[0064] [Aspect 1] The sole is a part of the shoe, An elastically deformable cushioning layer, A bottom plate provided below the cushion layer, A top plate provided above the cushion layer, It comprises at least one pin-holding member that holds a spike pin, The bottom plate is, The plate body and It has at least one base portion that holds the at least one pin holding member, The at least one base portion has an upper surface formed at a position raised from the upper surface of the plate body, The aforementioned cushion layer is A first region located on the at least one base portion, It has a second region located on the plate body, The second region is a sole that includes a receiving space capable of receiving a portion of the first region when a vertical compressive load is applied to the cushioning layer.

[0065] In this sole, because the second region includes a receiving space, when a vertical compressive load is applied to the cushioning layer, a portion of the first region enters the second region, causing the cushioning layer to be compressed substantially uniformly as a whole. Therefore, the occurrence of unevenness in the compression ratio in the cushioning layer is suppressed. As a result, the rebound energy generated when the cushioning layer recovers (for example, when pushing off during running) is effectively increased.

[0066] [Aspect 2] The aforementioned cushion layer is Multiple lower wall sections, Multiple upper wall portions formed above the aforementioned multiple lower wall portions, Each has a plurality of vertical wall sections connecting the lower wall section and the upper wall section, The sole according to embodiment 1, wherein the second region includes a pair of adjacent vertical wall portions, and the receiving space is formed between the pair of vertical wall portions.

[0067] [Aspect 3] The aforementioned at least one pin retaining member includes a plurality of pin retaining members, The aforementioned at least one base portion includes a plurality of base portions, The sole according to embodiment 2, wherein the plurality of base portions include a support base portion that supports at least a part of the lower wall portion.

[0068] In this embodiment, when a vertical compressive load is applied to the sole, the cushioning layer is compressed by the base and the top plate, thereby effectively increasing the rebound energy generated when the cushioning layer recovers.

[0069] [Aspect 4] The sole according to embodiment 3, wherein the plurality of lower wall portions include at least one intermediate lower wall portion disposed between a pair of adjacent base portions.

[0070] [Aspect 5] The sole according to embodiment 4, wherein the at least one intermediate lower wall portion is in contact with the plate body.

[0071] [Aspect 6] The sole according to embodiment 2, wherein the length between the pair of vertical wall portions is 0.5 mm or more.

[0072] [Aspect 7] The cushion layer includes a three-dimensional structure consisting of a plurality of unit structures arranged adjacent to each other, Each of the aforementioned plurality of unit structures includes the upper wall portion, the lower wall portion, and the vertical wall portion. The sole according to embodiment 2, wherein the upper wall portion, the lower wall portion, and the vertical wall portion form a three-dimensional shape that defines the receiving space.

[0073] [Aspect 8] The sole according to embodiment 7, wherein the three-dimensional structure has a shape that opens the receiving space in the foot width direction of the sole.

[0074] [Aspect 9] A sole according to any one of embodiments 1 to 8, A shoe comprising an upper provided above the sole.

[0075] It should be noted that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the description of the embodiments above, and further includes all modifications within the meaning and scope equivalent to the claims. [Explanation of Symbols]

[0076] 1 shoe, 10 sole, 20 upper, 100 cushioning material, 101 cushioning layer, 101A cushioning layer, 101B cushioning layer, 101S three-dimensional structure, 101U unit structure, 101W wall, 102 fore midsole, 103 rear midsole, 110 lower wall section, 112 intermediate lower wall section, 120 upper wall section, 130 vertical wall section, 200 bottom plate, 210 plate body, 210S top surface, 211 first body, 212 second body, 220 base section, 220S top surface, 222 support base section, 300 top plate, 400 joining member, 500 pin holding member, R1 first area, R2 second area, S receiving space, SC shoe center.

Claims

1. The sole is a part of the shoe, An elastically deformable cushioning layer, A bottom plate provided below the cushion layer, A top plate provided above the cushion layer, It comprises at least one pin-holding member that holds a spike pin, The bottom plate is, The plate body and It has at least one base portion that holds the at least one pin holding member, The at least one base portion has an upper surface formed at a position raised from the upper surface of the plate body, The aforementioned cushion layer is A first region located on at least one of the base portions, It has a second region located on the plate body, The second region is a sole that includes a receiving space capable of receiving a portion of the first region when a vertical compressive load is applied to the cushioning layer.

2. The aforementioned cushion layer is Multiple lower wall sections, Multiple upper wall portions formed above the aforementioned multiple lower wall portions, Each has a plurality of vertical wall sections connecting the lower wall section and the upper wall section, The sole according to claim 1, wherein the second region includes a pair of adjacent vertical wall portions, and the receiving space is formed between the pair of vertical wall portions.

3. The aforementioned at least one pin retaining member includes a plurality of pin retaining members, The aforementioned at least one base portion includes a plurality of base portions, The sole according to claim 2, wherein the plurality of base portions include a support base portion that supports at least a part of the lower wall portion.

4. The sole according to claim 3, wherein the plurality of lower wall portions include at least one intermediate lower wall portion disposed between a pair of adjacent base portions.

5. The sole according to claim 4, wherein the at least one intermediate lower wall portion is in contact with the plate body.

6. The sole according to claim 2, wherein the length between the pair of vertical wall portions is 0.5 mm or more.

7. The cushion layer includes a three-dimensional structure consisting of a plurality of unit structures arranged adjacent to each other, Each of the aforementioned plurality of unit structures includes the upper wall portion, the lower wall portion, and the vertical wall portion. The sole according to claim 2, wherein the upper wall portion, the lower wall portion, and the vertical wall portion form a three-dimensional shape that defines the receiving space.

8. The sole according to claim 7, wherein the three-dimensional structure has a shape that opens the receiving space in the foot width direction of the sole.

9. A sole according to any one of claims 1 to 8, A shoe comprising an upper provided above the sole.

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