JP7591920B2 - Spiked sole and spike shoes equipped with the same - Google Patents

Description

The present invention relates to a spike sole and spike shoes equipped with the same.

In sports, if an athlete's shoes slip on the ground, the athlete cannot obtain sufficient propulsion and braking power. For this reason, spiked shoes that have improved grip on the ground are used in sports played on grass or dirt. Spiked shoes have a spiked sole that includes an outsole and studs that protrude from the outsole. Because the studs of spiked shoes dig into the ground, they have a stronger grip on the ground than shoes without studs.

In recent years, spike shoes with resin outsoles have been used to increase durability. Also, from the viewpoint of reducing fatigue of the wearer, there is a demand for lighter spike shoes. In spike shoes with resin outsoles, spike fittings are embedded and fixed in the outsole, and the parts of the spike fittings that protrude from the outsole can be used as studs. By using a structure in which the spike fittings that become each stud are individually embedded and fixed in the outsole, there is no need to provide parts on the spike fittings that connect the studs together, and lighter weight can be achieved. Also, since there are no parts that connect the studs together, the shoes are more likely to deform in response to plantar flexion of the foot when running, which makes it less likely to cause discomfort to the wearer.

Patent Document 1 discloses a spike shoe in which spike fittings with protrusions that rise vertically from a base are insert-molded into a resin outsole.

Whether a stud contributes to improving propulsion or braking power is determined by its installation position on the outsole. Therefore, when the spike fittings disclosed in Patent Document 1 are installed to improve propulsion power, they are installed on the outsole with the base facing backwards so that they do not fall off due to the reaction force of the propulsion force, and when the spike fittings are installed to improve braking power, they are installed on the outsole with the base facing forward so that they do not fall off due to the reaction force of the braking force.

JP 2012-254264 A

However, in reality, the reaction force of the braking force is also applied to the spike fittings that are installed on the outsole to improve propulsion, and the reaction force of the propulsion force is also applied to the spike fittings that are installed on the outsole to improve braking. When an external force is applied to the protruding piece of the spike fittings disclosed in Patent Document 1 from the side where the base plate is not provided, the external force is transmitted directly to the outsole. For this reason, in a spike sole using the spike fittings disclosed in Patent Document 1, the reaction force applied from the ground to the studs during running and braking causes cracks to develop in the outsole, making the spike fittings more likely to fall off.

The present invention was made in consideration of the above, and aims to provide a spike sole in which the spikes embedded in the outsole are less likely to fall off from the outsole.

In order to solve the above problems and achieve the object, the spike sole according to the present invention comprises a resin outsole provided with a ground contact surface, and a number of spike fittings provided on the ground contact surface. Each spike fitting comprises a stud portion whose upper portion is embedded in the outsole and whose lower portion protrudes from the ground contact surface, and an anchor portion formed to be continuous with the upper end of the stud portion and embedded in the outsole. The stud portion comprises a plate-shaped blade portion having a first surface and a second surface, and wing portions installed on both sides of the blade portion and bent toward the first surface. The anchor portion has a center anchor extending from the upper end of the blade portion toward the second surface, and a side anchor extending from the upper end of each wing portion toward the first surface.

The spike sole of the present invention has the effect that the spike metal fittings embedded in the outsole are less likely to fall off from the outsole.

FIG. 1 is a perspective view of a spike shoe according to a first embodiment of the present invention. FIG. 2 is a bottom view of the spike sole according to the first embodiment. FIG. 3 is a side view of the medial side of the spike sole according to the first embodiment. FIG. 4 is a perspective view of a spike fitting of the spike shoe according to the first embodiment. FIG. 5 is a bottom view of the spike fitting of the spike shoe according to the first embodiment. FIG. 6 is a front view of a spike fitting of the spike shoe according to the first embodiment. FIG. 7 is a rear view of the spike fitting of the spike shoe according to the first embodiment. FIG. 8 is a side view of a spike fitting of the spike shoe according to the first embodiment. FIG. 9 is an enlarged view of a portion of the outsole of the cleated shoe according to the first embodiment, in which the cleated metal fittings are embedded. FIG. 10 is a diagram showing the effect of preventing the spike metal fitting of the first embodiment from falling off when an external force is applied to the spike metal fitting from the first surface side. FIG. 11 is a diagram showing the effect of preventing the spike metal fitting of the first embodiment from falling off when an external force is applied to the second surface side. FIG. 12 is a top view of a spike fitting according to the second embodiment of the present invention.

Below, an embodiment of the spike sole and spike shoes according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to this embodiment. Note that in the embodiments shown below, the same or common parts are given the same reference numerals, and their description will not be repeated.

In the embodiment described below, the direction in which the heel center axis, which is a perpendicular line passing through the center of the heel of the sole when the spiked shoe is viewed in a plan view, extends is referred to as the front-rear direction, and the direction perpendicular to the front-rear direction when the spiked shoe is viewed in a plan view is referred to as the foot width direction.

In the front-to-rear direction, the direction from the end of the sole where the part supporting the rear part of the foot is located to the end of the sole where the part supporting the forefoot is located is called the forward direction, and the direction from the end of the sole where the part supporting the forefoot is located to the end of the sole where the part supporting the rear part of the foot is located is called the rear direction.

The side of the foot that is on the midline in the anatomical orthogonal position is called the medial foot side, and the side of the foot opposite the midline in the anatomical orthogonal position is called the lateral foot side. In other words, the side closer to the midline in the anatomical orthogonal position is called the medial foot side, and the side farther from the midline in the anatomical orthogonal position is called the lateral foot side.

Furthermore, unless otherwise specified, the height direction means the direction perpendicular to both the front-to-back direction and the foot width direction, and the thickness means the dimension in the height direction, unless otherwise specified.

(Embodiment 1)
1 is a perspective view of a spike shoe according to a first embodiment of the present invention. The spike shoe 1A includes an upper 10 and a spike sole 20A. The upper 10 has a shape that covers the entire instep side of the foot into which it is inserted. The spike sole 20A is located below the upper 10 and covers the sole of the foot.

The upper 10 includes an upper body 11 and a shoe tongue 12. The shoe tongue 12 is fixed to the upper body 11. In addition, shoe laces 16 are removably attached to the upper body 11.

The upper body 11 has an upper opening at the top that exposes the top of the ankle and part of the instep. A plurality of holes 13 are provided around the periphery of the upper opening of the upper body 11. The tongue 12 is fixed to the upper body 11 by sewing, welding, bonding, or a combination of these so as to cover the part of the upper opening in the upper body 11 that exposes part of the instep. The upper body 11 and the tongue 12 are made of woven fabric, knitted fabric, synthetic leather, or resin. Note that the materials of the upper body 11 and the tongue 12 are not limited to those exemplified.

The shoelace 16 is a string-like member that is inserted into the multiple holes 13 in the upper body 11. The shoelace 16 inserted into the multiple holes 13 draws the periphery of the upper opening of the upper body 11 toward each other in the foot width direction. By tightening the shoelace 16 with the foot inserted into the upper body 11, the upper body 11 can be made to fit closely to the foot.

In addition, a hook-and-loop fastener may be used instead of shoelaces 16 to fit the upper body 11 to the foot. When using a hook-and-loop fastener to fit the upper body 11 to the foot, the hole 13 is not formed in the upper body 11.

Figure 2 is a bottom view of the spike sole according to the first embodiment. Figure 3 is a side view of the medial side of the spike sole according to the first embodiment. The spike sole 20A includes a resin outsole 21 with a ground contact surface 21b, and multiple spike fittings 22, 23 provided on the ground contact surface 21b. The underside of the outsole 21 forms the ground contact surface 21b that contacts the ground. The spike fittings 22, 23 are partially embedded in the outsole 21, and the parts of the spike fittings 22, 23 that protrude from the outsole 21 form studs. The spike sole 20A is formed by arranging the spike fittings 22, 23 in a mold shaped like the outsole 21 and insert molding the spike fittings 22, 23, so that parts of the spike fittings 22, 23 are embedded in the outsole 21.

The spike fittings 22 include a front fitting 22a that is positioned forward of the portion supporting the MP joint of the wearer's foot, and an intermediate fitting 22b that is positioned between the portion supporting the MP joint of the wearer's foot and the portion supporting the Lisfranc joint. The front fitting 22a improves the propulsive force when the wearer runs forward. The intermediate fitting 22b improves the braking force when the wearer decelerates while running forward. In addition, the spike fitting 23 embedded in the portion supporting the heel of the wearer's foot functions as a rear fitting that improves stability when stationary. The spike fittings 23 that serve as rear fittings are made of known spike fittings with the entire stud portion being flat, since no load is applied during running or braking.

The front metal fittings 22a are provided in multiple locations on the outsole 21, with the number of front metal fittings 22a arranged on the half of the inner foot side in the foot width direction being greater than the number of front metal fittings 22a arranged on the half of the outer foot side in the foot width direction. When the wearer runs forward, he or she puts weight on the ball of the foot to push off the ground, so by increasing the number of front metal fittings 22a on the half of the inner foot side in the foot width direction, the effect of improving propulsion force when running forward is enhanced compared to a structure in which the same number of front metal fittings are evenly arranged on the inner and outer foot sides.

The spike sole 20A also has a midsole (not shown) that covers the lower opening of the upper body 11. The midsole is fixed to the upper surface of the spike sole 20A by gluing or welding. The midsole is also fixed to the lower edge of the upper body 11 by sewing. The spike sole 20A may have a structure that omits the midsole.

The spike shoes 1A may also include an insole. If the spike shoes 1A include an insole, the insole is placed on top of the spike sole 20A inside the upper 10.

Figure 4 is a perspective view of the spike fitting of the spike shoe according to the first embodiment. Figure 5 is a bottom view of the spike fitting of the spike shoe according to the first embodiment. Figure 6 is a front view of the spike fitting of the spike shoe according to the first embodiment. Figure 7 is a rear view of the spike fitting of the spike shoe according to the first embodiment. Figure 8 is a side view of the spike fitting of the spike shoe according to the first embodiment. Each spike fitting 22 has a stud portion 221 whose upper part is embedded in the outsole 21 and whose lower part protrudes from the ground surface 21b, and an anchor portion 222 formed continuous with the upper end of the stud portion 221 and embedded in the outsole 21. The stud portion 221 has a plate-shaped blade portion 31 having a first surface 31a and a second surface 31b, and wing portions 32 installed on both sides of the blade portion 31 and bent toward the first surface 31a. The anchor portion 222 includes a center anchor 41 that extends from the upper end of the blade portion 31 toward the second surface 31b, and side anchors 42 that extend from the upper end of each wing portion 32 toward the first surface 31a. A through hole 41a is formed in the center anchor 41.

As shown in FIG. 5, the blade portion 31 and the wing portion 32 are bent at an angle θ. In the first embodiment, the angle θ is 45°. Since the side anchor 42 extends from the upper end of the wing portion 32, which is bent toward the first surface 31a side of the blade portion 31, the direction in which the wing portion 32 extends is oblique to the direction perpendicular to the blade portion 31. However, the distance L1 between the tip 41t of the center anchor 41 and the blade portion 31 in the direction perpendicular to the blade portion 31 and the distance L2 between the tip 42t of the side anchor 42 and the blade portion 31 in the direction perpendicular to the blade portion 31 are approximately equal.

As shown in FIG. 5, when an imaginary circle C is drawn on a plane perpendicular to the blade portion 31, with its center at point A, which is the center in the thickness direction and width direction of the blade portion 31, and its radius being the length of the center anchor 41, the side anchor 42 is positioned inside the imaginary circle C. Compared to a spike fitting in which the entire stud portion is flat, the spike fitting 22 according to the first embodiment has a smaller area of the gap between the side anchors 42 on a plane perpendicular to the blade portion 31. This makes it possible to reduce the amount of resin required to thicken the outsole 21 and embed the anchor portion 222, thereby realizing a lighter spike sole 20A.

In this example, the angle θ between the blade portion 31 and the wing portion 32 is 45°, but if the angle θ between the blade portion 31 and the wing portion 32 is between 30° and 45°, the amount of resin in the outsole 21 can be reduced in the same manner as above, thereby achieving the effect of making the spike sole 20A lighter.

The spike fitting 22 of the above shape can be easily mass-produced by pressing a plate-shaped metal member. When making the spike fitting 22 by pressing a plate-shaped metal member and bending it, a V-groove can be formed in advance at the valley fold at the boundary between the blade portion 31 and the center anchor 41, which increases the curvature of the boundary between the blade portion 31 and the center anchor 41, and the spike fitting 22 can be made smaller without reducing the area of the blade portion 31 and the center anchor 41. Similarly, a V-groove can be formed in advance at the valley fold at the boundary between the wing portion 32 and the side anchor 42, which increases the curvature of the boundary between the wing portion 32 and the side anchor 42, and the spike fitting 22 can be made smaller without reducing the area of the wing portion 32 and the side anchor 42.

9 is an enlarged view of a portion of the outsole of the spike shoe according to the first embodiment where the spike fittings are embedded. As shown in FIG. 9, the upper portion and anchor portion 222 of the stud portion 221 are embedded in the outsole 21, and only the lower portion of the stud portion 221 protrudes from the outsole 21. The portion of the stud portion 221 protruding from the outsole 21 penetrates the ground when the wearer runs or brakes. Since the wing portion 32 of the spike fitting 22 is bent toward the first surface 31a of the blade portion 31, the force with which the stud portion 221 penetrates the ground is greater on the first surface 31a side than on the second surface 31b side. Therefore, as shown in FIG. 2, the spike fitting 22 with the front fitting 22a that improves forward propulsion can generate a large propulsive force by installing the second surface 31b facing forward on the outsole 21, whereby the stud portion 221 can grip the ground on the first surface 31a side. In addition, the spike fittings 22, which have intermediate fittings 22b that improve the braking force when running forward, are installed on the outsole 21 with the first surface 31a facing forward, allowing the stud portion 221 to grip the ground on the first surface 31a side and generate a large braking force.

When the wearer runs or brakes in an unspecified direction during a race, external forces are applied to the stud portion 221 of the spike fitting 22 from both the first surface 31a and the second surface 31b.

Figure 10 is a diagram showing the effect of preventing the spike fitting according to embodiment 1 from falling off when an external force is applied from the first surface side. When an external force F1 is applied to the stud portion 221 of the spike fitting 22 from the first surface 31a side, a moment M1 is generated around the fulcrum P1 at the tip of the center anchor 41, and a force R1 that presses the side anchor 42 is applied from the outsole 21, thereby preventing the spike fitting 22 from falling off. Figure 11 is a diagram showing the effect of preventing the spike fitting according to embodiment 1 from falling off when an external force is applied from the second surface side. When an external force F2 is applied to the stud portion 221 of the spike fitting 22 from the second surface 31b side, a moment M2 is generated around the fulcrum P2 at the tip of the side anchor 42, and a force R2 that presses the center anchor 41 is applied from the outsole 21, thereby preventing the spike fitting 22 from falling off. The through hole 41a is formed in the center anchor 41, so that the resin forming the outsole 21 flows into the through hole 41a. This increases the force with which the outsole 21 presses against the center anchor 41.

When the wearer runs forward, an external force F1 is applied to the stud portion 221 of the spike fitting 22, which is the front fitting 22a, from the first surface 31a, and an external force F2 is applied to the stud portion 221 of the spike fitting 22, which is the intermediate fitting 22b, from the second surface 31b. On the other hand, when the wearer brakes while running forward, an external force F2 is applied to the stud portion 221 of the spike fitting 22, which is the front fitting 22a, from the second surface 31b, and an external force F1 is applied to the stud portion 221 of the spike fitting 22, which is the intermediate fitting 22b, from the first surface 31a. The spike fitting 22 is prevented from falling off the outsole 21 regardless of whether external force F1 or F2 is applied, so it can be used for both the front fitting 22a and the intermediate fitting 22b.

In the spike shoes 1A according to the first embodiment, the distance L1 between the tip of the center anchor 41 and the blade portion 31 in the direction perpendicular to the blade portion 31 and the distance L2 between the tip of the side anchor 42 and the blade portion 31 in the direction perpendicular to the blade portion 31 are approximately equal, so that the durability of the outsole 21 against the external force applied to the stud portion 221 of the spike fitting 22 from the first surface 31a side is equivalent to the durability of the outsole 21 against the external force applied from the second surface 31b side, and the durability of the outsole 21 against the force applied from a specific direction is not reduced. In addition, when the spike fitting 22 is produced by bending, the distance L1 between the tip of the center anchor 41 and the blade portion 31 in the direction perpendicular to the blade portion 31 and the distance L2 between the tip of the side anchor 42 and the blade portion 31 in the direction perpendicular to the blade portion 31 are approximately equal, so that the amount of waste material generated when punching the spike fitting 22 before bending from a plate-shaped metal member can be reduced. This increases the material yield when producing the spike fittings 22 and reduces material costs.

In this way, the spike shoes 1A according to embodiment 1 are suitable for sports such as baseball and softball, in which players run and brake in unspecified directions, because the outsole 21 is not easily damaged when an external force is applied to the stud portion 221 of the spike fittings 22 from a specific direction.

(Embodiment 2)
12 is a top view of a spike fitting 22 according to a second embodiment of the present invention. The spike fitting 22 according to the second embodiment differs from the spike fitting 22 according to the first embodiment in that the side anchor 42 is widened to form a through hole 42a.

When the anchor portion 222 of the spike fitting 22 according to the second embodiment is embedded in the outsole 21 by insert molding, the resin of the outsole 21 enters the through-hole 42a and solidifies. Therefore, compared to the spike fitting 22 according to the first embodiment in which no through-hole is formed in the side anchor 42, the spike fitting 22 according to the second embodiment has a stronger force with which the outsole 21 presses the side anchor 42. Therefore, the spike fitting 22 according to the second embodiment is less likely to fall off the outsole 21 when an external force is applied to the stud portion 221 from the first surface 31a side.

In the above description, the blade portion 31 is flat, but the blade portion 31 may be curved and convex toward the first surface 31a or the second surface 31b. The blade portion 31 may also have a bent portion and be configured with two or more surfaces. For example, the blade portion 31 may be V-shaped when viewed from below. The shape of the spike fitting 22 when viewed from above does not have to be symmetrical. For example, the lengths of the left and right side anchors 42 may be different. The sizes of the left and right wing portions 32 may also be different.

The configurations shown in the above embodiments are merely examples of the contents of the present invention, and may be combined with other known technologies. Parts of the configurations may be omitted or modified without departing from the spirit of the present invention.

1A spike shoes, 10 upper, 11 upper body, 12 shoe tongue, 13 hole portion, 16 shoe lace, 20A spike sole, 21 outsole, 21b ground contact surface, 22, 23 spike fittings, 22a front fittings, 22b middle fittings, 31 blade portion, 31a first surface, 31b second surface, 32 wing portion, 41 center anchor, 41a, 42a through holes, 41t, 42t tip, 42 side anchor, 221 stud portion, 222 anchor portion.

Claims (7)

A resin outsole with a ground contact surface,
a plurality of spikes provided on the ground surface;
Each of the spikes includes a stud portion having an upper portion embedded in the outsole and a lower portion protruding from the ground surface, and an anchor portion formed to be continuous with an upper end portion of the stud portion and embedded in the outsole,
the stud portion includes a plate-like blade portion having a first surface and a second surface, and wing portions provided on both sides of the blade portion and bent toward the first surface,
the anchor portion has a center anchor extending from an upper end of the blade portion toward the second surface side, and side anchors extending from upper ends of the wing portions toward the first surface side,
A gap is provided between the tips of the side anchors,
A spike sole, wherein a distance between a tip of the side anchor and the blade portion in a direction perpendicular to the blade portion is approximately equal to a distance between a tip of the center anchor and the blade portion in a direction perpendicular to the blade portion . The spike sole according to claim 1, wherein the stud portion is bent so that the blade portion and the wing portion form an angle of 30° to 45°. The spike sole according to claim 1 or 2 , wherein a through hole is formed in the center anchor. The plurality of spike fittings include a front fitting that is disposed forward of a portion that supports the MP joint of the wearer's foot,
The spike sole according to claim 1 , wherein the front metal fitting is disposed so that the second surface faces forward. A plurality of the front fittings are provided,
The spike sole according to claim 4, wherein the number of the front metal fittings arranged on the half surface on the inner side of the foot in the width direction of the foot is greater than the number of the front metal fittings arranged on the half surface on the outer side of the foot in the width direction of the foot. The spike fittings include an intermediate fitting disposed between a portion supporting the MP joint and a portion supporting the Lisfranc joint of the wearer's foot,
The spike sole according to claim 4 or 5 , wherein the intermediate metal fitting is installed with the first surface facing forward. A spike shoe comprising the spike sole according to any one of claims 1 to 6 and an upper located above the spike sole.

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