JP3292582B2 - Athletic shoes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an athletic shoe, such as a tennis shoe, which requires an appropriate grip performance and slide performance on a shoe sole.

[0002]

2. Description of the Related Art Glove performance and slide performance are important performance factors required for shoe soles of athletic shoes. Particularly, in the case of tennis shoes used on artificial grass courts and clay courts containing sand, these two performances are required. It is very important to have a good balance.

Conventionally, in a tennis shoe of this type, a plurality of protrusions of the same shape having a plurality of circular or square-shaped grounding surfaces formed in a predetermined arrangement pattern on the sole of the shoe, so that the sole of the shoe is gripped. Some have configurations that provide performance and sliding performance.

[0004]

By the way, in the conventional tennis shoes, since a large number of projections formed on the sole of the shoe have a circular or square shape, the gripping performance and the sliding performance have a direction. Therefore, it is not possible to provide appropriate grip performance and slide performance in a direction required when playing tennis.

[0005] When playing tennis, the need for the sliding performance is when the vehicle dashes and stops, that is, when the vehicle suddenly stops. The direction requiring the sliding performance is mainly in the toe direction. It is. Therefore, if the user does not have an appropriate sliding performance in the toe direction, the user easily trips at an abrupt stop and easily damages the ankle or knee. Also, grip performance is required when sprinting and suddenly turning in the lateral direction, and the direction requiring grip performance is in the direction of 60 ° to the heel direction and toe. is there. Therefore, 60 ° to heel direction and toe
If the vehicle does not have an appropriate grip performance in the direction of, the vehicle easily slips and falls when sprinting or suddenly turning in the lateral direction.

For this reason, it is very important for sports shoes such as tennis shoes to have a proper balance of grip performance and slide performance in the direction required during exercise.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a proper balance of grip performance and slide performance in directions required during exercise by giving directionality to grip performance and slide performance. It is an object of the present invention to provide an athletic shoe.

[0008]

According to the present invention, in order to achieve the above object, in an athletic shoe having a large number of protrusions formed on a shoe sole, at least 20% of the effective contact area of the protrusions is reduced to a contact surface. It is characterized in that the shape is a triangle, and one vertex of the triangle is directed to the toe.

Further, in an athletic shoe having a large number of protrusions formed on a sole thereof, the shape of the grounding surface of the protrusions is a triangle or a circle having one vertex directed to the toe, and the effective grounding of the triangular protrusions. The ratio of the area to the effective contact area of the circular projection is in the range of 20:80 to 70:30.

[0010]

According to the present invention, more than 20% of the effective contact area of the projection is a triangle having a contact surface shape of a triangle, and one vertex of the triangle is directed to the toe. In addition to providing the directionality of sliding performance in the toe direction by the squeezing action of the top of the protrusion, the direction of the grip performance in the direction of 60 ° to the heel direction and the toe by the edge action of the bottom and hypotenuse of the triangular protrusion To have. Thereby, the sliding performance and the grip performance can be provided in a well-balanced direction in the direction required during exercise.

Further, the shape of the ground contact surface of a number of protrusions formed on the sole of the shoe is triangular or circular, and the ratio of the effective contact area between the triangular protrusion and the circular protrusion is 20:80 to 70:30.
By setting the range, it is possible to provide an appropriate sliding performance without slipping too much in the toe direction, and it is possible to enhance the grip performance in the heel direction and the direction of 60 ° to the toe.

[0013]

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings.

FIG. 1 is a bottom view of a tennis shoe as an athletic shoe according to the present invention, and FIG.
It is a partially expanded sectional view in a line.

In FIGS. 1 and 2, (1) is a shoe sole, and a large number of triangular protrusions having a triangular shape of the ground contact surface are formed on almost the entire bottom surface (excluding a part of the heel portion and the arch portion). (2) (2) ... and a large number of circular projections (3) (3) ... having a circular grounding surface shape are alternately arranged in front, rear, left and right, and each triangular projection (2). (2)
One vertex of ... is directed to the toe.

Since a large number of triangular projections (2) (2) are formed on the bottom surface of the shoe sole (1), the shape of the contact surface is triangular, and one of the vertices is directed toward the toe.
The triangular projections (2) (2) ... have a sliding performance in the toe direction due to the squeezing action of the vertices, and the heel and triangular projections (2) (2). Gives the direction of grip performance in the direction of 60 ° to the toe.

As a result, the sliding performance in the toe direction can be improved, and an appropriate sliding effect can be obtained at the time of an abrupt stop, so that the vehicle does not trip. In addition, the grip performance in the direction of 60 ° with respect to the heel direction and the toe can also be improved, and when dashing and suddenly turning in the lateral direction, the kicking effect is obtained and the fall due to slipping occurs, It leads to improvement of dashing power.

In the present invention, the effective contact area (s) of the triangular projection (2), the direction of the apex, and the circular projection (3)
Samples A to H in which the number ratios are variously changed, and Sample I composed of a number of protrusions having a semicircular shape of the ground contact surface, are prepared, and a weight of 8 kg is placed on them and horizontally. By measuring the load applied when pulled, the coefficient of friction in the toe direction, the heel direction, and the direction at 60 ° to the toe was determined, and the results are shown in Table 1 below. Table 1 also shows the results of having three senior amateur tennis players try on the shoes of Samples A to I to actually play tennis and evaluate the sliding performance in the toe direction. Samples A to I are tennis shoes having a size of 25.5 cm, and have the same shape and structure except for the soles. In Table 1, the number ratio of the projections is shown, and this is calculated from the number of projections interrupted at the end of the shoe sole as one projection.

[0020]

[Table 1]

From Table 1 above, it is clear that the samples A, B, C, and D have a smaller coefficient of friction in the toe direction and a larger coefficient of friction in the heel direction and the direction of 60 ° with respect to the toe. As a result, when the ratio of the triangular projections (2) is large, the friction coefficient in the toe direction is small and the sliding performance is high, and the friction coefficient in the heel direction and the direction of 60 ° to the toe is large and the grip performance is high. When the ratio is 20% or more, appropriate slide performance and slip performance can be obtained. Among them, 20% to 70% are good without excessive sliding. If the ratio of the triangular projections (2) is less than 20%, the friction coefficient in the toe direction is large, and the friction coefficient in the direction of 60 ° with respect to the heel direction and the toe is small, so that appropriate sliding performance and grip performance are obtained. Difficult.

Also, from Table 1, Sample F is Sample D
Also, it is clear that Sample D has a larger coefficient of friction in the direction of 60 ° with respect to the heel direction and the toe than Sample G as compared with Sample G. As a result, when the effective contact area (s) of the triangular projection (2) is large, the friction coefficient in the direction of 60 ° with respect to the heel direction and the toe is large, so that the grip performance is improved, and the effective contact area (s) is 50 mm. ^{When it is 2} or less, a moderate grip performance can be obtained, and especially 25 mm ² or less is good.
The effective contact area (s) of the triangular projection (2) is 50 mm ²
When the ratio exceeds, the friction coefficient in the direction of 60 ° with respect to the heel direction and the toe is small, so that it is difficult to obtain an appropriate grip performance.

Also, from Table 1, Sample H is Sample D
Conversely, it is clear that the coefficient of friction in the toe direction is greater than the coefficient of friction in the direction of the heel and 60 ° to the toe. As a result, when the apex of the triangular protrusion (2) is oriented in the heel direction, the friction coefficient in the toe direction is large,
It is difficult to obtain appropriate grip performance in the direction of heel and in the direction of 60 ° to the direction of 60 ° to the direction of the heel and the toe because it is not possible to obtain a moderate sliding performance in the direction of the toe and a small friction coefficient in the direction of 60 ° to the heel and the toe . From this, it can be seen that the triangular projection (2) whose apex is directed toward the toe has better sliding performance and grip performance than the triangular projection (2) whose apex is directed toward the heel.

Further, from Table 1, it is clear that Sample I has a small coefficient of friction in the direction of 60 ° to the toe. As a result, when the contact surface shape of the protrusion is semicircular, and the semicircular straight side is directed to the heel direction, the friction coefficient in the heel direction is large, but the friction coefficient in the direction of 60 ° to the toe is small. Therefore, it is difficult to obtain an appropriate grip performance in a direction of 60 ° to the toe. From now on, the triangular projection (2)
From the protrusion with a semi-circular contact surface to the toe
It can be seen that moderate grip performance is excellent in the direction of 60 °.

In the present invention, as in the above embodiment, a large number of triangular projections (2) (2) are provided on almost the entire bottom surface of the shoe sole (1) (excluding a part of the heel portion and the arch portion). . And the circular projections (3), (3) are most effective, but partially a large number of triangular projections (2) (2).
Even if the circular projections (3), (3),... Are formed, the above effect can be expected.

In the above embodiment, a triangular projection (2) having one of the vertices directed to the toe and a circular projection (3) are formed on the sole (1) at substantially the same ratio. However, the present invention is not limited to this, and as is apparent from Table 1, 20% or more of the effective contact area is constituted by a triangular projection (2) in which one of the vertices is directed to the toe. As long as it is good, the projections other than the triangle projection (2) in which one of the vertices is directed to the toe are also shapes other than circular, such as a semicircle, square, pentagon, or a triangle in which one of the vertices is directed to the heel. good.

Further, in the above embodiment, the case where the present invention is applied to tennis shoes is described. However, the present invention can be applied to exercise shoes other than tennis shoes.

[0028]

As described above, the present invention has improved sliding performance and grip performance by forming a large number of protrusions on the sole of the shoe with a triangular shape of the ground contact surface, one of the vertices of which is directed toward the toe. Since it is possible to provide directionality, appropriate sliding performance and grip performance in a direction required during exercise can be provided in a well-balanced manner.
Especially in the case of tennis shoes used on sandy artificial turf courts and clay courts, an appropriate sliding effect is obtained when stopping suddenly, so that it does not trip, improving safety against ankles and knees, and dashing When kicking and suddenly turning to the side, an excellent kicking effect is obtained, so that a fall due to a slip is eliminated and, at the same time, a dash force is increased, leading to an improvement in athletic ability.

[Brief description of the drawings]

FIG. 1 is a bottom view of a tennis shoe as an athletic shoe according to the present invention.

FIG. 2 is a partially enlarged sectional view taken along line aa of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sole 2 Triangular projection 3 Circular projection s Effective contact area

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) A43B 5/10 A43B 13/00-13/26

Claims (2)

(57) [Claims] 1. An athletic shoe having a large number of protrusions formed on a sole thereof, wherein the effective contact area of the protrusions is 20%.
% Or more of the sports shoes, wherein the shape of the ground contact surface is a triangle, and one vertex of the triangle is directed to the toe. 2. An athletic shoe having a plurality of protrusions formed on a sole thereof, wherein the effective contact surface of the protrusions has a triangular shape and a circular shape whose one apex is directed toward the toe. An athletic shoe, wherein the ratio of the contact area to the effective contact area of the circular projection is in the range of 20:80 to 70:30.