JP2009233163A - Sole structure of sports shoe and sports shoe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the sole structure of a sports shoe excellent in slip-resistant characteristic and a sports shoe having the sole structure. <P>SOLUTION: The sports shoe is provided with a tabular base part 30 constituting a part of a sole part and a plurality of protrusions 31 protruding from the surface of the base part 30 and having a contact face 34 touching a ground or a floor face. The projection 31 has first and second side walls 32, 33. The first side wall 32 is inclined such that the width of the projection 31 on the side near the base part 30 is larger than the width of the projection 31 on the side apart from the base part 30. The inclination angle θ1 of the first side wall 32 relative to the perpendicular line on the surface of the base part 30 is larger than the inclination angle of the second side wall 33. The first and second side walls 32, 33 are arranged so that the load applied on the projection 31 may direct from the first side wall 32 to the second side wall 33 when a wearer acts to wear the shoe. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sole structure for sports shoes and sports shoes, and more particularly to a sole structure for sports shoes excellent in slip resistance and a sports shoe having the sole structure.

Conventionally, various ideas have been applied to the bottom shape of the sole portion in order to improve the anti-slip characteristics of sports shoes. For example, in Japanese Patent Application Laid-Open No. 2004-216019, in order to improve anti-slip characteristics, a large number of horizontal stripes are provided on the bottom surface of the sole portion, and the inclination angle θa of the toe side wall surface of this horizontal stripe mountain is the inclination angle θb of the heel side wall surface. When the friction coefficient is measured on the hard coat, the ratio (μa / μb) between the friction coefficient μa in the toe direction on the bottom surface and the friction coefficient μb in the heel side direction is 0.3 or more and 0.9. The following tennis shoes are listed.
Japanese Patent Laid-Open No. 2004-216019

  In the tennis shoes described in the above-mentioned document, the relationship between the inclination angle of the toe side wall surface and the heel side wall surface of the horizontal muscle mountain provided on the bottom surface of the sole portion is specified, but only focusing on the shape of each horizontal muscle mountain. is there.

  However, the inventors of the present application conducted a finite element method (FEM) analysis using a unique model and examined the shape of the sole bottom of a sports shoe having excellent anti-slip characteristics. It has been found that sufficient anti-slip characteristics may not be obtained by focusing only on the shape.

  Accordingly, an object of the present invention is to provide a sole structure of a sports shoe excellent in anti-slip characteristics and a sports shoe having the sole structure.

  The sole structure of the sports shoe according to the present invention extends along the sole of the wearer and protrudes from the surface of the base portion that forms a part of the sole portion of the sport shoe, and the surface of the base portion. And a plurality of convex portions having contact surfaces in contact with the ground surface or the floor surface. The convex part has a first side wall and a second side wall, and the first side wall is such that the width of the convex part on the side close to the base part is larger than the width of the convex part on the side away from the base part. The first angle that is inclined and formed by the first side wall and the normal of the surface of the base portion is greater than the second angle that is the angle of the second side wall and the normal of the surface of the base portion. large. When the wearer wears sports shoes and performs an operation, the first side wall and the second side wall are arranged such that the direction of the load applied to the convex portion is a direction from the first side wall to the second side wall. Place.

  Even if the interval between contact surfaces adjacent in the direction from the first side wall to the second side wall is changed according to the size of the contact width in the direction from the first side wall to the second side wall. Good.

  In addition, the first angle is set so that the direction of the contact force, which is the force received by the contact surface from the ground or floor when the wearer wears the sports shoes and moves, is opposite to the direction of the load. Further, the distance between the contact surfaces and the contact width may be adjusted.

  The distance between the contact surfaces adjacent in the direction from the first side wall to the second side wall is the same as the contact width that is the width of the contact surface in the direction from the first side wall to the second side wall, or ± 0.5 mm thereof. It is good also as a value within the range. Preferably, both the distance between the contact surfaces and the contact width are values in the range of 1 mm or more and 3 mm or less.

  The base part includes a toe side part, a heel side part, an inner part located on the first finger side of the wearer's foot, and an outer part located on the fifth finger side of the wearer's foot. And in the vertical direction from the toe side part toward the heel side part within the range of 20% to 40% of the maximum length of the base part from the tip of the toe side part, and in the lateral direction from the inner part to the outer part It is conceivable to provide the convex portion in a region within 60% of the maximum width of the base portion from the end portion of the inner portion. In addition, the vertical direction is within the range of 20% to 50% of the maximum length of the base portion from the tip of the toe side portion, and 60% of the maximum width of the base portion is laterally extended from the inner end portion. You may provide a convex part in the area | region in the range which reaches an outer side part from this position.

  The sports shoe according to the present invention has the above-described sole structure.

  In the present invention, a second side wall having a relatively small inclination angle is provided from a first side wall which is a side wall of a convex portion provided on the base part along the sole of the wearer and has a relatively large inclination angle with respect to the perpendicular to the surface of the base part. Since the first side wall and the second side wall are arranged so that the load acts in the direction toward the side wall, the lateral direction acting on the convex portion when the wearer wears sports shoes and performs the operation. The load can be received by the convex portion. As a result, the anti-slip property can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a sports shoe 1 having the sole structure of the present embodiment. The sports shoes 1 of the present embodiment are useful for sports performed indoors (for example, a gymnasium) such as volleyball and basketball, but can also be used for sports performed outdoor such as tennis. In particular, it is useful for sports performed on a smooth trial surface (a floor may be coated or a sheet may be laid).

  As shown in FIG. 1, a sports shoe 1 includes an upper part (cover part) 2 that covers the back side of the wearer's foot, and a sole part (bottom part) 3 that is disposed under the sole of the wearer. Is provided.

  The upper portion 2 can be manufactured using various materials such as knitted fabric, woven fabric, artificial leather, or a combination of these materials. The sole portion 3 extends along the sole of the wearer, and extends from the buttocks to the toe portion through the middle foot portion.

  In the example of FIG. 1, the sole portion 3 includes a midsole 3a and an outsole 3b. The midsole 3a may have a single layer structure, but may have a stacked structure in which a plurality of layers are stacked. It is also possible to omit the midsole 3a. The outsole 3b is attached to the lower surface of the midsole 3a, and is extended from the buttocks to the toe portion through the middle foot, similarly to the midsole 3a. The outsole 3b includes a contact surface in contact with the ground surface or the floor surface on the bottom surface.

  The midsole 3a and the outsole 3b can be manufactured using, for example, a soft elastic member. For example, a thermoplastic resin foam such as ethylene-vinyl acetate copolymer (EVA), a thermosetting resin foam such as polyurethane (PU), a kind of synthetic rubber such as natural rubber, styrene butadiene rubber, and butadiene rubber Alternatively, the midsole 3a and the outsole 3b can be made of a soft elastic member such as a synthetic resin such as rubber, vinyl chloride resin, or urethane resin to which two or more kinds are added. Moreover, you may produce the midsole 3a and the outsole 3b combining the said soft elastic member and a hard member.

  In the present embodiment, the shape of the outsole 3b is particularly devised. In FIG. 2, the fragmentary sectional view of the structural example of the outsole 3b of this Embodiment is shown.

  As shown in FIG. 2, the outsole 3b has a plate-like base portion 30 that extends along the sole of the wearer, and a contact that protrudes from the surface (lower surface) of the base portion 30 and makes contact with the ground or floor surface. A plurality of convex portions 31 having a surface 34.

  The convex portions 31 are arranged at predetermined intervals, and each have a first side wall 32, a second side wall 33, and a contact surface 34 at the bottom. The first side wall 32 and the second side wall 33 are disposed on both sides of the convex portion 31. The first side wall 32 is inclined in a tapered shape so that the width of the convex portion 31 on the side close to the base portion 30 is larger than the width of the convex portion 31 on the side away from the base portion 30. The contact surface 34 is a surface that is expected to come into contact with the ground surface or the floor surface, and is typically configured as a flat surface. However, the contact surface 34 is provided with a slight unevenness or a surface other than a flat surface such as a curved surface. You may comprise.

  As shown in FIG. 2, the inclination angle of the first side wall 32 of the convex portion 31 and the inclination angle of the second side wall 33 are different from each other. More specifically, a first angle θ1 that is an angle formed by the first side wall 32 and a normal to the flat surface (lower surface) of the base portion 30 is defined as the second side wall 33 and the normal to the surface of the base 30. It is larger than the second angle that is the angle formed. Therefore, in the cross section shown in FIG. 2, the convex part 31 will have an asymmetrical shape. In the example of FIG. 2, the second side wall 33 is perpendicular to the surface of the base portion 30 (the second angle is 0 (zero) degree), but the base is at an angle θ2 smaller than the first angle θ1. You may incline with respect to the normal of the said surface of the part 30. FIG.

  In the present embodiment, when the wearer wears the sports shoes 1 and operates, the direction of the load applied to the convex portion 31 (the direction of the lateral component) is changed from the first side wall 32 to the second side wall 33. The first side wall 32 and the second side wall 33 are arranged so as to be in the direction toward the front.

  A gap is provided between adjacent convex portions 31. In the example of FIG. 2, the width of the gap gradually increases from the root portion of the convex portion 31 toward the contact surface 34 and becomes the largest between the contact surfaces 34 of the adjacent convex portions 31. In the example of FIG. 2, the interval (hereinafter referred to as “rib interval”) D between the contact surfaces 34 of the adjacent convex portions 31 is as large as the width W (hereinafter referred to as “contact width”) of the contact surface 34. I am trying.

  As the material of the outsole 3b shown in FIG. 2, for example, a soft elastic material having a hardness of JIS K 6253 A45 to A85 is used. The term “hardness” as used herein refers to a hardness meter conforming to the JIS K 6253 standard in a room at a room temperature of about 20 ° C. that is left for 4 hours or more under the conditions of a temperature of 20 ± 2 ° C. and a relative humidity of 65 ± 2%. It is a thing when measuring. Desirably, a shoe having a hardness of JIS K 6253 A50 to A70 is considered in consideration of a balance such as durability, grip property and flexibility as a general shoe.

  The thickness t of the base portion 30 of the outsole 3b is, for example, about 1 mm to 2 mm, and the height H of the convex portion 31 is, for example, about 1 mm to 5 mm.

  The present inventors conducted a finite element method (FEM) analysis in order to confirm that the outsole 3b shown in FIG. 2 has excellent anti-slip characteristics, and the results are shown in FIGS. explain.

  FIG. 3 is a diagram showing a finite element analysis model of the outsole 3b. For convenience of explanation, each part of the model shown in FIG. 3 is given the same reference numeral as the corresponding part in the example shown in FIG. 2, and description of each part of the model shown in FIG. 3 is omitted.

  PamCrash v2006 (Japan SII Corporation) is used for the analysis. The analysis model is composed of three parts: a shoe sole part, a part corresponding to the ground, and a rigid surface for applying a load evenly to the shoe upper surface. Here, the element size of the analysis model is 0.2 mm. The sole part of the shoe uses an 8-node solid element, and the rigid surface on the upper surface of the sole part of the shoe and the ground use a 4-node shell element. The contact between the upper surface of the sole portion of the shoe and the rigid body is a contact type 36 (Self-impact Node-to-Segment with Edge Treatment), and the contact between the ground and the contact surface 34 is a contact type 34 (Non-Symmetric Node). -To-Segment Contact with Edge Treatment). As a load condition, an oblique load indicated by an arrow 4 (+0.17633 kN in the X direction and −1.0 kN in the Y direction) is applied to the position of the center of gravity of the rigid surface. The parameter of the anti-slip characteristic is a contact force between the ground and the contact surface 34.

  4 and 5 show examples of deformation behavior of the model shown in FIG. FIG. 4 shows an example of deformation behavior when a load is applied in the direction opposite to the direction of FIG. 3, and FIG. 5 shows an example of deformation behavior when a load is applied in the same direction as that of FIG. Indicates.

  As shown in FIG. 4, when a load is applied in a direction opposite to the direction of FIG. 3, each convex portion 31 of the outsole 3b falls to the right side in the figure, and the contact surface 34 and the ground contact each other. When this occurs, the contact force acting between them acts in the direction indicated by the arrow 5. That is, in the example of FIG. 4, the direction of the contact force acting between the contact surface 34 and the ground is the same as the direction of the load indicated by the arrow 4. For this reason, the load cannot be sufficiently received by each convex portion 31, and good anti-slip characteristics cannot be obtained.

  On the other hand, as shown in FIG. 5, when the inclination angle (taper angle: θ1) of the first side wall 32 with respect to the normal of the surface of the base portion 30 is larger than the inclination angle of the second side wall 33, the first side wall When a load is applied in a direction indicated by an arrow 4 that is a direction from 32 to the second side wall 33, each convex portion 31 is in a state of supporting the base portion 30 without falling to the right side of the drawing. As a result, the contact force acts in the direction opposite to that shown in FIG. 4 as indicated by the arrow 5, and the direction of the contact force acting between the contact surface 34 and the ground is opposite to the direction of the load. It becomes. For this reason, according to the example of FIG.

  From the above analysis results, when the wearer wears the sports shoe 1 having the outsole 3b including the shape shown in FIG. It can be seen that by providing the first side wall 32 and the second side wall 33 in the direction from the first side wall 32 toward the second side wall 33, good anti-slip characteristics can be obtained.

  Next, the inventors of the present invention fix the contact width W of the model shown in FIG. 3 to 2 mm, the rib interval D to 1.5 mm, and set the first angle θ1 that is the inclination angle of the first side wall 32 from 10 degrees to 28 degrees. Since the value of the contact force was calculated by changing the angle to a degree, the result is shown in FIG.

  As shown in FIG. 6, it can be seen that the value of the contact force also changes by changing the first angle θ1 shown in FIG. In FIG. 6, the absolute value of the contact force is shown on the vertical axis, and each contact force shown in FIG. 6 acts in the direction of the arrow 5 shown in FIG. 3, that is, the direction opposite to the direction of the load. It has also been confirmed that the contact force can be applied in a direction opposite to the direction of the load by setting the first angle θ1 to an angle larger than 0 (zero) degree. Note that the “movement amount” in FIG. 6 is the movement amount in the X direction of the gravity center position of the rigid body portion on the upper surface of the shoe sole portion.

  Further, the inventors of the present application created a model in which the contact width W was changed from 1 mm to 6 mm and the rib interval D was changed from 0.5 mm to 3 mm, and examined how the value of the contact force changes. For example, when the number of the protrusions 31 is determined so that the sum of the contact widths W is 6 mm, the contact widths W are 5 types of 1 mm, 1.5 mm, 2 mm, 3 mm, and 6 mm, and the rib interval D is 0.5 mm. There are 6 types in 0.5mm increments up to ~ 3mm. The examination results are shown in FIGS. In FIG. 7 and FIG. 8, the size of the black circle indicates the size of the contact force.

  As shown in FIGS. 7 and 8, it can be seen that even when the rib interval D is changed, the value of the contact force changes. Further, when the contact width W is changed, the value of the contact force also changes. Therefore, by appropriately adjusting the rib interval D according to the contact width W, the value of the contact force can be set to a desired value, and excellent anti-slip characteristics can be realized.

  As shown in FIG. 7 and FIG. 8, for example, when the rib interval D and the contact width W are set to the same value, the value of the contact force increases, and excellent anti-slip characteristics can be expected. More specifically, the rib interval D and the contact width W are the same value or within a range of ± 0.5 mm (for example, when the rib interval D and the contact width W are 1.5 mm, the hatched area in FIG. If the value is within the range of (1), excellent anti-slip characteristics can be expected. Here, the above-mentioned value of “± 0.5 mm” is a value that can be considered to vary in dimensions when the sole portion of the shoe is actually formed. Further, when the rib interval D and the contact width W are set to values within the range of 1 mm or more and 3 mm or less, excellent anti-slip characteristics can be expected. Further, by appropriately adjusting not only the rib interval D and the contact width W but also the first angle θ1, the value of the contact force can be easily adjusted to adjust the anti-slip characteristic.

  Next, the present invention and the like calculate the force applied to the sole of a person's foot during exercise by a unique technique, and the results are shown in FIGS. 9 (a) to 9 (c) to FIG.

  FIG. 9A is a diagram showing the direction of the force when stopped while moving forward by an arrow, and FIG. 9B is the direction of the force when stopped while moving right by the side step. FIG. 9C is a diagram showing the direction of force when traveling forward with arrows. In each figure, the area surrounded by the curve indicates an area where the magnitude of the force is the same, and there are some areas in the outermost area. Big in size.

  As shown in FIGS. 9A to 9C, it can be seen that there are various directions of the force applied to the sole of the human foot during each operation. For example, in FIG. 9A, there is little lateral force from the inner side 17 to the outer side 18 of the base portion of the outsole, and the vertical or diagonal direction from the heel side portion 16 to the toe side portion 15 of the base portion. The power of. On the other hand, in FIG. 9B, there is a lot of lateral force from the inner portion 17 to the outer portion 18 of the base portion of the outsole, and the vertical direction from the heel side portion 16 to the toe side portion 15 of the base portion or Diagonal force is reduced. In FIG.9 (c), the force of the vertical direction or diagonal direction which goes to the heel side part 16 from the toe side part 15 of the said base part increases.

  In order to provide the convex portion 31 according to the present embodiment, the convex portion 31 is provided on the bottom surface of the base portion of the outsole so as to extend in a direction orthogonal to the arrow in each of the above figures, and the arrow The plurality of convex portions 31 may be arranged so that the first and second side walls 32 and 33 are sequentially arranged in the direction of. Thereby, the anti-slip | skid characteristic of sports shoes can be improved.

  In addition, the said convex part 31 can anticipate the anti-slipping effect excellent in the part by installing in the at least one part of the bottom face of the base part of an outsole. In particular, by providing the convex portions 31 for each operation at locations where a large force is applied during each operation, the sports shoe 1 having excellent anti-slip characteristics for all operations can be obtained.

  Next, the example of arrangement | positioning of the said convex part 31 in the bottom face of the base part of the outsole of the sport shoes of this Embodiment is demonstrated using FIG. 10 (a), (b) and FIG.

  As shown in FIGS. 10 (a) and 10 (b), the base portion of the outsole includes a toe side portion 15, a heel side portion 16, an inner portion 17 located on the first finger side of the wearer's foot, And an outer portion 18 located on the fifth finger side of the wearer's foot. And it is in the range of 20% to 40% of the maximum length of the base portion from the tip of the toe side portion 15 in the longitudinal direction (length direction) from the toe side portion 15 to the heel side portion 16, and the inner portion It is conceivable that the convex portion 31 is provided in the first region 8 in the range of 60% of the maximum width of the base portion from the end portion of the inner portion 17 in the lateral direction (width direction) from 17 to the outer portion 18.

  In the relationship with the wearer's foot bone shown in FIG. 10A, the first region 8 extends from the first finger to the third finger in the lateral direction, and from the first finger to the first in the vertical direction. This is an area extending from the three finger proximal phalanges 12a, 12b, and 12c to the metatarsals 13a, 13b, and 13c.

  When the convex portion 31 is provided in the first region 8, the angle θ3 formed by the horizontal center line of the base portion and the longitudinal (extending) direction of the convex portion 31 is, for example, 0 (zero) degree to 120 degrees. A plurality of convex portions 31 may be arranged in parallel in the lateral direction on the bottom surface of the base portion.

  Further, the base portion is in the range of 20% to 50% of the maximum length of the base portion from the tip of the toe side portion 15 of the base portion, and the base portion extends from the end portion of the inner portion 18 of the base portion in the lateral direction. The convex portion 31 may be provided in the second region 9 within a range reaching the outer portion 18 from a position of 60% of the maximum width of the portion.

  In the relationship with the wearer's foot bone shown in FIG. 10A, the second region 9 extends from the third finger to the fifth finger in the horizontal direction and in the third finger in the vertical direction. From the phalanx 11c to the metatarsal bone 13c through the proximal phalanx 12c, from the fourth finger distal phalanx 10d to the metatarsal bone 11d and the proximal phalanx 12d to the metatarsal bone 13d, and from the fifth phalanx phalange 10e The region extends from the metatarsal bone 11e and the proximal phalanx 12e to the metatarsal bone 13e.

  When the convex portion 31 is provided in the second region 9, the angle θ3 formed by the horizontal center line of the base portion and the longitudinal (extending) direction of the convex portion 31 is, for example, −135 degrees to 45 degrees. In this way, a plurality of convex portions 31 may be provided side by side on the bottom surface of the base portion.

  In addition, although the convex part 31 may be provided in a predetermined angle in both the said 1st and 2nd area | regions 8 and 9, you may provide the convex part 31 in one of the 1st and 2nd area | regions 8 and 9. FIG. Moreover, the shape of the convex part 31 can be made into arbitrary shapes other than the above. Further, in the base portion of the outsole, the convex portion 31 may be provided in a region having a shape and a position different from those of the first and second regions 8 and 9.

  Although the embodiment of the present invention has been described above, the above-described embodiment can be variously modified. The scope of the present invention is not limited to the above-described embodiment. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is a perspective view of a sports shoe in one embodiment of the present invention. It is a fragmentary sectional view of the outsole of the sport shoes in one embodiment of the present invention. It is a figure which shows an example of the model for finite element analysis. It is a figure which shows the deformation | transformation state of a model at the time of applying a load from the opposite direction to the model for finite element analysis. It is a figure which shows the deformation | transformation state of a model at the time of adding a load from the direction shown in FIG. 3 to the model for finite element analysis. It is a figure which shows the relationship between the contact force, the inclination-angle of a 1st side wall, and the moving amount | distance. It is a figure which shows the relationship between a contact width, a rib space | interval, and the magnitude | size of contact force. It is a figure which shows the relationship between a contact width, a rib space | interval, and the magnitude | size of contact force. (A) is the figure which showed the direction of the force which acts on the sole at the time of stopping while moving forward, with the arrow, (b) is the sole at the time of stopping while moving to the right side step It is the figure which showed the direction of the force which acts on an arrow with the arrow, (c) is a figure which shows the direction of the force which acts on the sole in the case of driving | running | working ahead with an arrow. (A) is the external view seen from the base part bottom face of the outsole which described a person's leg | foot and skeleton together, (b) is a figure which shows an example of the convex part formation location seen from the base part bottom face of the outsole. It is. It is the figure which wrote the name on the skeleton of a person's foot.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Sport shoes, 2 Upper part, 3 Sole part, 3a Midsole, 3b Outsole, 4, 5, 7 Arrow, 6 Flex line, 8 1st area | region, 9 2nd area | region, 10d, 10e End phalanx, 11c, 11d, 11e Middle phalanx, 12a, 12b, 12c, 12d, 12e Basic phalanx, 13a, 13b, 13c, 13d, 13e Metatarsal bone, 15 Toe side part, 16 heel side part, 17 medial part, 18 lateral part , 30 base portion, 31 convex portion, 32 first side wall, 33 second side wall, 34 contact surface.

Claims (8)

A plate-like base portion (30) extending along the sole of the wearer and constituting a part of the sole portion (3) of the sports shoe (1);
A plurality of convex portions (31) having a contact surface (34) protruding from the surface of the base portion (30) and in contact with the ground or floor surface;
The convex portion (31) has a first side wall (32) and a second side wall (33),
In the first side wall (32), the width of the convex portion (31) on the side close to the base portion (30) is larger than the width of the convex portion (31) on the side away from the base portion (30). It is inclined so that
The first angle, which is an angle formed between the first side wall (32) and the surface normal of the base part (30), is the second side wall (33) and the surface normal of the base part (30). Is larger than the second angle which is the angle formed by
When the wearer wears the sports shoe (1) and performs an operation, the direction of the load applied to the convex portion (31) is directed from the first side wall (32) to the second side wall (33). A sole structure of a sports shoe, wherein the first side wall (32) and the second side wall (33) are arranged in a direction.   The distance (D) between the contact surfaces (34) adjacent to each other in the direction from the first side wall (32) to the second side wall (33) is determined from the first side wall (32) to the second side wall (33). The sole structure of the sports shoe according to claim 1, wherein the sole structure is changed in accordance with a size of a ground contact width (W) which is a width of the contact surface (34) in a direction toward the surface.   When the wearer wears the sports shoes (1) and performs the operation, the direction of the contact force, which is the force received by the contact surface (34) from the ground or floor surface, is opposite to the direction of the load. The sports shoe sole structure according to claim 2, wherein the first angle, the distance (D) between the contact surfaces (34), and the contact width (W) are adjusted.   The distance (D) between the contact surfaces (34) adjacent to each other in the direction from the first side wall (32) to the second side wall (33) is determined from the first side wall (32) to the second side wall (33). The value according to any one of claims 1 to 3, wherein the contact width (W), which is the width of the contact surface (34) in the direction toward the center, is the same value or a value within a range of ± 0.5 mm thereof. The sole structure of sports shoes.   The distance (D) between the contact surfaces (34) adjacent in the direction from the first side wall (32) to the second side wall (33), and the second side wall (33) from the first side wall (32). The sports width according to any one of claims 1 to 4, wherein a contact width (W), which is a width of the contact surface (34) in a direction toward the front, is a value within a range of 1 mm or more and 3 mm or less. Sole structure of shoes. The base part (30) includes a toe side part (15), a heel side part (16), an inner part (17) located on the first finger side of the wearer's foot, and a fifth part of the wearer's foot. An outer portion (18) located on the finger side,
Within a range of 20% to 40% of the maximum length of the base portion (30) from the tip of the toe side portion (15) in the longitudinal direction from the toe side portion (15) to the heel side portion (16). And in a lateral direction from the inner part (17) to the outer part (18), from an end of the inner part (17) to a region within a range of 60% of the maximum width of the base part (30). The sole structure of the sports shoe according to any one of claims 1 to 5, wherein the convex portion (31) is provided. The base part (30) includes a toe side part (15), a heel side part (16), an inner part (17) located on the first finger side of the wearer's foot, and a fifth part of the wearer's foot. An outer portion (18) located on the finger side,
The end of the inner part (17) is in the range of 20% to 50% of the maximum length of the base part (30) from the tip of the toe side part (15) in the vertical direction and in the lateral direction. The convex portion (31) is provided in a region within a range from the position reaching 60% of the maximum width of the base portion (30) to the outer portion (18). The sole structure of the sport shoes described in Crab.   A sports shoe comprising the sole structure according to any one of claims 1 to 7.