JP6849765B1 - Running shoes and volleyball shoes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide running shoes which guide the impact of landing toward the toes and easily convert them into propulsive force. We provide volleyball shoes that guide the impact of landing in the height direction and easily convert it into jumping force. SOLUTION: A midsole, a shock absorbing member formed above the midsole and narrower than the width of the midsole, and a shock absorbing member formed above the shock absorbing member and wider than the width of the midsole. The width is narrow, and it has a plate-like material containing a low-melting-melt resin component of a thermoplastic resin and a high-melting-melting resin component of a thermoplastic resin, and the shock absorbing member has a thickness change rate measured under the following conditions. Running shoes that are 0 to 60%. The thickness change rate is the location where the thickness d1 was measured, compressed by 50% based on JIS K6400-3, left at 70 ° C. for 22 hours, then released, and after 30 minutes, the thickness d1 was measured. Measure the thickness d2 with, and calculate based on the following formula. Thickness change rate (%) = [(d1-d2) / d1] × 100 [Selection diagram] Fig. 1

Description

The present invention relates to running shoes and volleyball shoes.

Generally, when exercising, wear shoes to cushion the impact of landing. Shoes are roughly divided into a sole (sole) and an upper (a part that covers the instep), and a heel counter is often provided as a reinforcing member on the heel part of the shoe.

The sole is often composed of three main soles: an outsole, a midsole, and an insole. Of these, the outsole is the contact patch of the shoe and is required to have grip on the ground and durability against wear. The insole is an insole that is placed in the part of the shoe that comes into contact with the sole of the foot, and is generally removable afterwards. By inserting an insole, the size can be adjusted and the fit of the shoes can be improved. The midsole is placed between the outsole and the insole and is used to cushion the impact of landing. In addition, the midsole may have a shock absorbing member arranged separately from the midsole, and the midsole may be called a midsole including the shock absorbing member.

Such shoes are required to have various functions other than cushioning the impact. For example, in Patent Document 1, when running, the foot lands from the outside of the heel, and then the center of the load moves to the inside of the forefoot, so that valgus (pronation) of the heel occurs and excessive pronation occurs. , It has been pointed out that leg injury due to running occurs, and it is stated that shoes are required to have a function of suppressing excessive pronation in order to prevent the occurrence of leg injury. Further, in Patent Document 2, it is pointed out that shoes for running barefoot are becoming more popular, and it is described that shoes are required to have a function of obtaining a state close to the movement of joints during barefoot running. Has been done.

International Publication No. 2010/049983 International Publication No. 2016/208061

By the way, among runners, the more skilled runners are, the stronger the demand is to increase the running speed and shorten the time. The running speed is determined by the pitch and stride during running. Pitch is the number of steps per second. Stride is the stride length, which is the distance traveled from one foot to the same side again. The longer the mileage and the longer the running time, the more the runner gets tired. However, according to the present inventors, the stride tends to be shorter when the runner is tired, but the pitch does not change much even if the runner is tired. I found out. Possible causes of shortened stride are, for example, weakening of the hip joint and the inability to kick the road surface, the knees falling when landing, and the stooping of the cat and the inability to swing the arms. When the strength of the hip joint weakens, the burden on the knees and ankles increases. If the knee falls when landing, the center of gravity moves up and down, resulting in energy loss. If your arms do not swing, your core will shake, your balance will be lost, and your lower body will be affected. Therefore, it is required that shoes have a shock absorbing function, and that the impact of landing during running is guided toward the toes and converted into propulsive force so that the stride does not become short even if fatigue occurs. Be done.

Volleyballers, on the other hand, have a strong demand to leap high to attack and block. Therefore, the shoes are required not only to have a shock absorbing function but also to guide the impact of the landing stepped on at the time of jumping in the height direction and convert it into a jumping force.

As described above, it was found that the functions required for running shoes and volleyball shoes are different, and the solution is also different between running shoes and volleyball shoes.

The present invention has been made by paying attention to the above circumstances, and an object of the present invention is to provide running shoes that guide the impact of landing toward the toes and easily convert them into propulsive force. Another object of the present invention is to provide a volleyball shoe that guides the impact of landing in the height direction and easily converts it into a jumping force.

The present invention includes the following inventions.
[1] A midsole, a shock absorbing member formed above the midsole and narrower than the width of the midsole, and a shock absorbing member formed above the shock absorbing member and wider than the width of the midsole. The width is narrow, and it has a plate-like material containing a low melting point resin component of a thermoplastic resin and a high melting point resin component of a thermoplastic resin, and the shock absorbing member has a thickness change rate of 0 as measured under the following conditions. Running shoes characterized by ~ 60%.
(Thickness change rate)
The thickness change rate is determined by measuring the thickness d _1, in a compressed state of 50% based on JIS K6400-4, at 70 ° C., allowed to stand 22 hours, then released after the lapse of 30 minutes, measuring the thickness d _{1 The thickness d 2} is measured at the specified location and calculated based on the following formula.
Thickness change rate (%) = [(d ₁ − d ₂ ) / d ₁ ] × 100
[2] The running shoe according to [1], wherein the shock absorbing member is arranged in a recess formed on the upper surface side of the midsole.
[3] The running shoe according to [1] or [2], wherein at least a part of the plate-shaped object is arranged in a recess formed on the upper surface side of the midsole.
[4] The running shoe according to any one of [1] to [3], wherein the length of the plate-shaped object is 30% or more with respect to the length of the midsole.
[5] The running shoe according to any one of [1] to [4], wherein the plate-like material has a thickness of 0.4 to 1.7 mm.
[6] The plate-like object extends in the length direction including at least a position facing the arch of the shoe wearer, and is convex downward to a position facing the arch of the shoe wearer. The running shoe according to any one of [1] to [5], which has a groove extending in the length direction of the shoe.
[7] The running shoe according to any one of [1] to [6], wherein the plate-shaped object has a downwardly convex groove on the front side of the midpoint in the length direction.
[8] The running shoe according to any one of [1] to [7], wherein the shock absorbing member is arranged at least behind the midpoint in the length direction of the midsole.
[9] The running shoe according to [8], wherein a second shock absorbing member having a thickness change rate larger than the thickness change rate of the shock absorbing member is arranged in front of the shock absorbing member.
[10] The midsole has a thickness change rate of 45 to 55%, and the shock absorbing member is a low thickness change rate shock absorbing member having a thickness change rate of 0 to 5%, and the second shock absorbing member. The running shoe according to [9], wherein the member has a thickness change rate of 45 to 55%.
[11] A plate-like material formed above the midsole, narrower than the width of the midsole, and containing a low melting point resin component of a thermoplastic resin and a high melting point resin component of a thermoplastic resin. The shock absorbing member has a shock absorbing member formed above the plate-shaped material and narrower than the width of the midsole, and the shock absorbing member has a thickness change rate of 0 as measured under the following conditions. Volleyball shoes characterized by ~ 60%.
(Thickness change rate)
The thickness change rate is determined by measuring the thickness d _1, in a compressed state of 50% based on JIS K6400-4, at 70 ° C., allowed to stand 22 hours, then released after the lapse of 30 minutes, measuring the thickness d _{1 The thickness d 2} is measured at the specified location and calculated based on the following formula.
Thickness change rate (%) = [(d ₁ − d ₂ ) / d ₁ ] × 100
[12] The volleyball shoe according to [11], wherein the plate-shaped object is arranged in a recess formed on the upper surface side of the midsole.
[13] The volleyball shoe according to [11] or [12], wherein at least a part of the shock absorbing member is arranged in a recess formed on the upper surface side of the midsole.
[14] The volleyball shoe according to any one of [11] to [13], wherein the length of the plate-shaped object is 30% or more with respect to the length of the midsole.
[15] The volleyball shoe according to any one of [11] to [14], wherein the plate-like material has a thickness of 0.4 to 1.7 mm.
[16] The plate-like object extends in the length direction including at least a position facing the arch of the shoe wearer, and is convex downward to a position facing the arch of the shoe wearer. , The volleyball shoe according to any one of [11] to [15], which has a groove extending in the length direction of the shoe.
[17] The volleyball shoe according to any one of [11] to [16], wherein the plate-shaped object has a downwardly convex groove on the front side of the midpoint in the length direction.
[18] The volleyball shoe according to any one of [11] to [17], wherein the shock absorbing member is arranged at least behind the midpoint in the length direction of the midsole.
[19] The volleyball shoe according to [18], wherein a second shock absorbing member having a thickness change rate larger than the thickness change rate of the shock absorbing member is arranged in front of the shock absorbing member.
[20] The midsole has a thickness change rate of 45 to 55%, and the shock absorbing member is a low thickness change rate shock absorbing member having a thickness change rate of 0 to 5%, and the second shock absorbing member. The member is the volleyball shoe according to [19], which has a thickness change rate of 45 to 55%.

According to the present invention, since the stacking order of the midsole, the shock absorbing member, and the plate-like material containing a specific resin component is optimized, running shoes that easily convert the impact of landing into propulsive force and landing shoes We can provide volleyball shoes that can easily convert impact into jumping force.

FIG. 1 is a perspective view showing the stacking order of the midsole, the shock absorbing member, and the plate-shaped material in the running shoe according to the present invention. FIG. 2 shows a cross-sectional view taken along the line AA of the running shoe shown in FIG. FIG. 3 is a graph showing the results of measuring the pitch and the step length of the first runner. FIG. 4 is a graph showing the results of measuring the pitch and the step length of the second runner. FIG. 5 is a graph showing the results of measuring the pitch and the step length of the third runner. FIG. 6 is a graph showing the results of measuring the pitch and the step length of the fourth runner.

The running shoe according to the present invention has a midsole, a shock absorbing member formed above the midsole and narrower than the width of the midsole, and a shock absorbing member formed above the shock absorbing member. The width is narrower than the width of the midsole, and has a plate-like material containing a low melting point resin component of a thermoplastic resin and a high melting point resin component of a thermoplastic resin, and the shock absorbing member is measured under the following conditions. It is characterized in that the thickness change rate is 0 to 60%.
(Thickness change rate)
The thickness change rate is determined by measuring the thickness d _1, in a compressed state of 50% based on JIS K6400-4, at 70 ° C., allowed to stand 22 hours, then released after the lapse of 30 minutes, measuring the thickness d _{1 The thickness d 2} is measured at the specified location and calculated based on the following formula.
Thickness change rate (%) = [(d ₁ − d ₂ ) / d ₁ ] × 100

The midsole is a member that covers almost the entire sole of the shoe wearer's foot, supports the shoe wearer's weight, and cushions the impact of landing.

The midsole is preferably made of a resin, and the resin is more preferably a foam. For example, it is preferably formed of a resin foam such as ethylene vinyl acetate (EVA), polyethylene (PE), polypropylene (PP), and polyurethane (PU). Of these, a foam made of EVA is particularly preferable.

The midsole is preferably formed with through holes penetrating in the vertical direction. As a result, the breathability and drainage of the shoe can be improved.

The number of through holes formed in the midsole may be one, but is preferably two or more, more preferably three or more, preferably eight or less, and more preferably six or less.
The shock absorbing member is a member that alleviates a landing collision.

The shock absorbing member is preferably made of a resin, and the resin is more preferably a foam. For example, it is preferably formed of a resin foam such as ethylene vinyl acetate (EVA), polyethylene (PE), polypropylene (PP), and polyurethane (PU). Of these, a foam made of EVA is particularly preferable.

The shock absorbing member used in the present invention has a thickness change rate of 0 to 60%. The thickness change rate is determined by measuring the thickness d _1, in a compressed state of 50% based on JIS K6400-4, at 70 ° C., allowed to stand 22 hours, then released after the lapse of 30 minutes, measuring the thickness d _{1 The thickness d 2} is measured at the specified location and calculated based on the following formula.
Thickness change rate (%) = [(d ₁ − d ₂ ) / d ₁ ] × 100

If the thickness change rate exceeds 60%, the impact absorbing member is deformed too much due to the impact of landing, so that the impact cannot be sufficiently absorbed, which imposes a burden on the shoe wearer. The thickness change rate is preferably 55% or less, more preferably 52% or less. The thickness change rate of the shock absorbing member is preferably small, and it is preferable to use a low thickness change rate shock absorbing member having a thickness change rate of 0 to 5%. As the low thickness change rate shock absorbing member having a thickness change rate of 0 to 5%, for example, PORON (trade name) manufactured by Rogers Suinoac Corporation can be used.

Further, as the shock absorbing member, two or more kinds of shock absorbing members having different thickness change rates may be used. For example, a low thickness change rate impact member having a thickness change rate of 0 to 5% may be used in combination with another shock absorbing member having a relatively larger thickness change rate.

The shock absorbing member is preferably arranged at least behind the midpoint in the length direction of the midsole. This can reduce the burden on the hind legs.

The shock absorbing member and the midsole may be made of different materials or may be made of the same material. In the case of the same material, it is preferable that the thickness change rate of the midsole is relatively larger than the thickness change rate of the shock absorbing member. That is, when the impact of landing is received, it is preferable that the midsole is more easily deformed than the shock absorbing member, and the shock absorbing member is more easily deformed than the midsole.

The width of the shock absorbing member is narrower than the width of the midsole. When the width of the midsole is 100%, the width of the shock absorbing member is, for example, preferably 70% or less, more preferably 65% or less, further preferably 60% or less, preferably 30% or more, and more preferably. Is 35% or more, more preferably 40% or more.

The shock absorbing member preferably has a through hole that penetrates in the vertical direction. As a result, the breathability and drainage of the shoe can be improved.

The number of through holes formed in the shock absorbing member may be one, but is preferably two or more, more preferably three or more, preferably eight or less, and more preferably six or less.

A second shock absorbing member may be arranged in front of the shock absorbing member. This can reduce the burden on the forefoot.

The shock absorbing member and the second shock absorbing member may have the same thickness change rate, but are preferably different. The thickness change rate of the second shock absorbing member is preferably relatively larger than the thickness change rate of the shock absorbing member arranged behind the midpoint in the length direction of the midsole. This can reduce the burden on the hind legs.

The second shock absorbing member is preferably made of a resin, and more preferably the resin is a foam. For example, it is preferably formed of a resin foam such as ethylene vinyl acetate (EVA), polyethylene (PE), polypropylene (PP), and polyurethane (PU). Of these, a foam made of EVA is particularly preferable.

The second shock absorbing member preferably has a through hole that penetrates in the vertical direction. As a result, the breathability and drainage of the shoe can be improved.

The number of through holes formed in the second shock absorbing member may be one, but is preferably two or more, more preferably three or more, preferably eight or less, and more preferably six or less. ..

The midsole has a thickness change rate of 45 to 55%, the shock absorbing member is a low thickness change rate shock absorbing member having a thickness change rate of 0 to 5%, and the second shock absorbing member has a thickness change rate. Is preferably 45 to 55%. This can reduce the burden on the heel.
The thickness change rate of the second shock absorbing member and the thickness change rate of the midsole may be about the same.

The plate-shaped material is a member containing a low melting point resin component of a thermoplastic resin and a high melting point resin component of a thermoplastic resin. For the plate-like material, for example, a plurality of cloth-like bodies formed by stretching a thermoplastic resin containing a low-melting point resin component and a high-melting point resin component are laminated and heat-compressed. It is preferable that they are integrally formed by the above. The striatum may be twisted, but it is preferably a flat striatum such as tape or yarn, and it is particularly preferable to use a flat yarn which is a tape-shaped striatum.

A sheet-like plate-like material integrated by laminating a plurality of cloth-like bodies formed by using the linear body and heating and compressing them can be obtained. By heating, the temperature is set so that the low melting point resin component melts and the high melting point resin component does not melt, so that the low melting point resin component acts as an adhesive component and the high melting point resin component becomes a reinforcing fiber.

The low-melting-point resin component and the high-melting-point resin component may be the low-melting-point resin component and the high-melting-point resin component originally contained in the resin constituting the linear body, or may be a portion of the low-melting-point resin component. It may be a linear body forming a portion of the melting point resin component. In the latter case, for example, a laminated structure in which a surface layer having a low melting point resin component is laminated on one side or both sides of a base layer having a high melting point resin component, and a surface layer having a base layer having a high melting point resin component as a low melting point resin component. It may have a core-sheath structure covered with a resin, a sea-island structure in which a low melting point component is dispersed in a base layer which is a high melting point component, or the like.

As the thermosetting resin, for example, polyolefin, polyamide, polyester and the like can be used.

The cloth-like body is a sheet-like body formed by using the striatum, and a woven cloth woven by warp and weft can be generally used, and the cloth-like body has a large number of striatums in one direction. A large number of striatum are arranged side by side so as to intersect in an arbitrary angular direction, and the intersections are joined by using an adhesive such as a hot melt agent or by heat fusion. It can also be a binding cloth. In addition, in the cloth-like body, a large number of striatum are arranged side by side in one direction, and a large number of striatum are arranged side by side so as to intersect in an arbitrary angle direction, and are connected by stitching threads. It can also be a multiaxial fiber base material. The cloth-like body may be knitted.

As the plate-shaped material, for example, KaRVO (trade name) manufactured by Diatex Co., Ltd. can be used.

The width of the plate is narrower than the width of the midsole. When the width of the midsole is 100%, the width of the plate-like object is, for example, preferably 70% or less, more preferably 65% or less, further preferably 60% or less, preferably 30% or more, and more preferably. Is 35% or more, more preferably 40% or more.

In the running shoe according to the present invention, the midsole and the shock absorbing member are formed above the midsole, and the plate-like material is formed above the shock absorbing member. FIG. 1 shows a laminated state of the midsole, the shock absorbing member, and the plate-like material. In FIG. 1, as the shock absorbing member formed on the midsole, the shock absorbing member 2a and the second shock absorbing member 2b were used.

In the running shoe of the present invention, as shown in the perspective view of FIG. 1, the midsole 1, the shock absorbing member 2a, the second shock absorbing member 2b, and the plate-shaped object 3 are laminated in this order from the bottom. As a result, the impact of landing can be guided toward the toes and converted into propulsive force. Through holes 11a to 11e are formed in the midsole 1.

In FIG. 1, the shock absorbing member 2a is arranged on the rear side of the midpoint in the length direction of the midsole 1, and the second shock absorbing member 2b is arranged on the front side of the midpoint in the length direction of the midsole 1. Has been done. Through holes 21a and 21b are formed in the second shock absorbing member 2b.

The plate-shaped object 3 extends in the length direction including a position facing the arch of the shoe wearer, and covers the upper surfaces of the shock absorbing member 2a and the second shock absorbing member 2b. The plate-shaped object 3 has grooves 31a and 31b that are convex downward and extend in the length direction of the shoe at positions facing the arch of the shoe wearer. Further, the plate-shaped object 3 has a downwardly convex groove 31c on the front side of the midpoint in the length direction. Further, the plate-shaped object 3 has a plurality of circular through holes at positions facing the arch of the shoe wearer.

Note that FIG. 1 shows an example in which a recess is formed on the upper surface side of the midsole 1 at a position facing the groove formed in the plate-shaped object 3, and this recess is used for running shoes. Does not need to be formed. On the other hand, in the case of volleyball shoes, which will be described later, in order to form a plate-like object on the midsole, the shoe is located above the midsole at a position facing the downwardly convex groove formed on the plate-like object. It is preferable that a groove having a convex shape in the direction is formed.

A cross-sectional view of the running shoe shown in FIG. 1 at the AA position is shown in FIG.

As shown in FIG. 2, a recess is formed on the upper surface side of the midsole 1, and the shock absorbing member 2a is arranged in the recess formed on the upper surface side of the midsole 1. Further, at least a part of the plate-shaped object 3 is arranged in the recess formed on the upper surface of the midsole 1.

As shown in FIG. 2, the shock absorbing member 2a is preferably arranged in a recess formed on the upper surface side of the midsole. As a result, the shock absorbing member 2a is less likely to be displaced from the arrangement position, so that the impact of landing can be reliably absorbed.

The upper surface of the shock absorbing member 2a arranged in the recess of the midsole may be flush with the upper surface of the midsole without a step.

As shown in FIG. 2, it is preferable that at least a part of the plate-shaped object is arranged in the recess formed on the upper surface side of the midsole. As a result, the plate-shaped object is less likely to be displaced from the arrangement position, so that the effect of improving the jumping force can be surely enjoyed.

The upper surface of the plate-shaped object arranged in the recess of the midsole may be flush with the upper surface of the midsole without a step.

The length of the plate-shaped object is preferably 30% or more with respect to the length of the midsole. This makes it easier to convert the impact of landing into propulsion. The length of the plate-like material is more preferably 50% or more, further preferably 70% or more, and particularly preferably 80% or more. However, if the plate-like object becomes too long, the rigidity of the entire shoe becomes too high, which imposes a burden on the shoe wearer. Therefore, the length of the plate-like material is preferably 95% or less, more preferably 90% or less, still more preferably 85% or less.

The thickness of the plate-like material is preferably 0.4 to 1.7 mm. As a result, the impact at the time of landing can be efficiently converted into propulsive force. The thickness of the plate-like material is more preferably 0.6 mm or more, further preferably 0.8 mm or more, still more preferably 1.5 mm or less, still more preferably 1.1 mm or less.

The thickness of the plate-shaped object shall be measured at a flat place, and shall be measured at a place where a convex groove, which will be described later, is not formed.

The plate-like object extends in the length direction including at least the position facing the arch of the shoe wearer, and is convex downward to the position facing the arch of the shoe wearer, and the length of the shoe. It is preferable to have a groove extending in the longitudinal direction. As a result, the rigidity of the plate-like object at the position facing the arch of the shoe wearer can be locally increased, so that the impact at the time of landing can be easily converted into propulsive force. In addition, by locally increasing the rigidity of the plate-shaped object at the position facing the arch of the shoe wearer, the bending position of the plate-shaped object can be moved to the front side in the length direction. It becomes a running shoe suitable for the forefoot running method.

The number of convex grooves formed at positions facing the arch of the shoe wearer is, for example, preferably 1 or more, more preferably 2 or more, preferably 4 or less, and more preferably 3 It is as follows.

The length of the convex groove formed at the position facing the arch of the shoe wearer is, for example, preferably 5 cm or more, more preferably 8 cm or more, further preferably 10 cm or more, preferably 18 cm or less, and more preferably. It is preferably 15 cm or less, more preferably 13 cm or less. This makes it easier to convert the impact of landing into propulsion.

The plate-shaped object may have a downwardly convex groove on the front side (that is, the toe side) from the midpoint in the length direction. As a result, the rigidity on the front side of the plate-shaped object can be locally increased, so that the impact at the time of landing can be easily converted into propulsive force.

The convex groove formed on the front side of the plate-shaped object may be formed so as to extend in the length direction of the shoe, or may be formed in a direction oblique to the width direction of the shoe or the length direction of the shoe. It may be formed to extend.

The number of convex grooves formed on the front side of the plate-like object is, for example, preferably 1 or more, more preferably 2 or more, preferably 4 or less, and more preferably 3 or less.

The length of the convex groove formed on the front side of the plate-like object is, for example, preferably 3 cm or more, more preferably 4 cm or more, further preferably 5 cm or more, preferably 10 cm or less, and more preferably 9 cm or less. , More preferably 8 cm or less. This makes it easier to convert the impact of landing into propulsion.

The width of the convex groove formed in the plate-like object is, for example, preferably 8 mm or less, more preferably 7 mm or less, further preferably 6 mm or less, preferably 2 mm or more, more preferably 3 mm or more, still more preferably. Is 4 mm or more. This makes it easier to convert the impact of landing into propulsion.

The depth of the convex groove formed in the plate-like object is, for example, preferably 0.5 mm or more, more preferably 0.8 mm or more, further preferably 1 mm or more, and preferably 2 mm or less, more preferably. It is 1.8 mm or less, more preferably 1.6 mm or less. This makes it easier to convert the impact of landing into propulsion.

It is preferable that the convex groove is not formed on the rear side (that is, the heel side) of the plate-like object. If it is formed on the rear side, the impact at the time of landing is less likely to be absorbed, which increases the burden on the legs.

It is preferable that the plate-shaped object is formed with through holes penetrating in the vertical direction. As a result, the breathability and drainage of the shoe can be improved.

The number of through holes formed in the plate-shaped object may be one, but is preferably two or more, more preferably three or more, preferably eight or less, and more preferably six or less.

The midsole and the shock absorbing member, and the shock absorbing member and the plate-like material may be fixed by, for example, an adhesive or heat fusion, but it is preferable not to fix them. By not fixing, the midsole, the shock absorbing member, and the plate-like object follow the movement of the shoe wearer's foot and easily deform, so that agile movement is possible.

It is preferable to place a resin cloth-like body covering the shock absorbing member and the plate-like object, and sew the cloth-like body to the midsole to fix the shock-absorbing member and the plate-like object to the midsole. ..

The cloth-like body is preferably composed of, for example, a resin such as polyester, polyethylene (PE), polypropylene (PP), or polyurethane (PU).

The cloth-like body that covers the shock absorbing member and the plate-like object is preferably mesh-shaped. As a result, the breathability and drainage of the shoe can be improved.

The running shoes of the present invention can be suitably used during running, and may be used for aquathlon, triathlon, trail running, etc. in addition to running. Aquathlon is a sport that runs after swimming. Triathlon is a sport in which you swim, ride a bicycle, and then run. Trail running is a competition that runs in the mountains other than paved roads. Of course, the running shoes of the present invention may be used for walking. Running also includes jogging, which has a relatively lower running speed than running. Among these, it is preferable to use it in running, aquathlon, triathlon, and trail running, more preferably aquathlon and triathlon, and particularly preferably triathlon.

Next, the volleyball shoes according to the present invention will be described.

The volleyball shoe according to the present invention has a midsole, which is formed above the midsole and is narrower than the width of the midsole, and has a low melting point resin component of a thermoplastic resin and a high melting point resin of a thermoplastic resin. It has a plate-shaped material containing a component and a shock absorbing member formed above the plate-shaped material and narrower than the width of the midsole, and the shock absorbing member is measured under the following conditions. It is characterized in that the thickness change rate is 0 to 60%.
(Thickness change rate)
The thickness change rate is determined by measuring the thickness d _1, in a compressed state of 50% based on JIS K6400-4, at 70 ° C., allowed to stand 22 hours, then released after the lapse of 30 minutes, measuring the thickness d _{1 The thickness d 2} is measured at the specified location and calculated based on the following formula.
Thickness change rate (%) = [(d ₁ − d ₂ ) / d ₁ ] × 100

The volleyball shoes according to the present invention and the above-mentioned running shoes have a midsole, a shock absorbing member having a width narrower than the width of the midsole, and a width narrower than the width of the midsole, and have a low melting point of a thermoplastic resin. It is common in that it has a resin component and a plate-like material containing a high melting point resin component of a thermoplastic resin, and that the thickness change rate of the shock absorbing member is 0 to 60%. For these commonalities, see the description of running shoes.

The volleyball shoe according to the present invention is characterized in that a plate-shaped object is arranged above the midsole and a shock absorbing member is arranged above the plate-shaped object. That is, in the volleyball shoe of the present invention, the midsole, the plate-like material, and the shock absorbing member are laminated in this order from the bottom. As a result, the impact of landing can be guided in the height direction and converted into a jumping force.

The plate-like material is preferably arranged in a recess formed on the upper surface side of the midsole. As a result, the plate-shaped object is less likely to be displaced from the arrangement position, so that the effect of improving the jumping force can be surely enjoyed.

The upper surface of the plate-shaped object arranged in the recess of the midsole may be flush with the upper surface of the midsole without a step.

It is preferable that at least a part of the shock absorbing member is arranged in the recess formed on the upper surface side of the midsole. As a result, the shock absorbing member is less likely to be displaced from the arrangement position, so that the impact of landing can be reliably absorbed.

The upper surface of the shock absorbing member arranged in the recess of the midsole may be flush with the upper surface of the midsole without a step.

The length of the plate-shaped object is preferably 30% or more with respect to the length of the midsole. This makes it easier to convert the impact when landing into jumping force. The length of the plate-like material is more preferably 50% or more, further preferably 70% or more, and particularly preferably 80% or more. However, if the plate-like object becomes too long, the rigidity of the entire shoe becomes too high, which imposes a burden on the shoe wearer. Therefore, the length of the plate-like material is preferably 95% or less, more preferably 90% or less, still more preferably 85% or less.

The thickness of the plate-like material is preferably 0.4 to 1.7 mm. As a result, the impact at the time of landing can be efficiently converted into a jumping force. The thickness of the plate-like material is more preferably 0.6 mm or more, further preferably 0.8 mm or more, still more preferably 1.5 mm or less, still more preferably 1.1 mm or less.

The thickness of the plate-shaped object shall be measured at a flat place, and shall be measured at a place where a convex groove, which will be described later, is not formed.

The plate-like object extends in the length direction including at least the position facing the arch of the shoe wearer, and is convex downward to the position facing the arch of the shoe wearer, and the length of the shoe. It is preferable to have a groove extending in the longitudinal direction. As a result, the rigidity of the plate-like object at the position facing the arch of the shoe wearer can be locally increased, so that the impact at the time of landing can be easily converted into a jumping force.

The number of convex grooves formed at positions facing the arch of the shoe wearer is, for example, preferably 1 or more, more preferably 2 or more, preferably 4 or less, and more preferably 3 It is as follows.

The length of the convex groove formed at the position facing the arch of the shoe wearer is, for example, preferably 5 cm or more, more preferably 8 cm or more, further preferably 10 cm or more, preferably 18 cm or less, and more preferably. It is preferably 15 cm or less, more preferably 13 cm or less. This makes it easier to convert the impact when landing into jumping force.

The plate-shaped object may have a downwardly convex groove on the front side (that is, the toe side) from the midpoint in the length direction. As a result, the rigidity on the front side of the plate-shaped object can be locally increased, so that the impact at the time of landing can be easily converted into a jumping force.

The convex groove formed on the front side of the plate-shaped object may be formed so as to extend in the length direction of the shoe, or may be formed in a direction oblique to the width direction of the shoe or the length direction of the shoe. It may be formed to extend.

The number of convex grooves formed on the front side of the plate-like object is, for example, preferably 1 or more, more preferably 2 or more, preferably 4 or less, and more preferably 3 or less.

The length of the convex groove formed on the front side of the plate-like object is, for example, preferably 3 cm or more, more preferably 4 cm or more, further preferably 5 cm or more, preferably 10 cm or less, and more preferably 9 cm or less. , More preferably 8 cm or less. This makes it easier to convert the impact when landing into jumping force.

The width of the convex groove formed in the plate-like object is, for example, preferably 8 mm or less, more preferably 7 mm or less, further preferably 6 mm or less, preferably 2 mm or more, more preferably 3 mm or more, still more preferably. Is 4 mm or more. This makes it easier to convert the impact when landing into jumping force.

The depth of the convex groove formed in the plate-like object is, for example, preferably 0.5 mm or more, more preferably 0.8 mm or more, further preferably 1 mm or more, and preferably 2 mm or less, more preferably. It is 1.8 mm or less, more preferably 1.6 mm or less. This makes it easier to convert the impact when landing into jumping force.

It is preferable that the convex groove is not formed on the rear side (that is, the heel side) of the plate-like object. If it is formed on the rear side, the impact at the time of landing is less likely to be absorbed, which increases the burden on the legs.

The midsole and the plate-shaped object, and the plate-shaped object and the shock absorbing member may be fixed by, for example, an adhesive or heat fusion, but it is preferable not to fix them. By not fixing, the midsole, the plate-like object, and the shock absorbing member are easily deformed by following the movement of the shoe wearer's foot, so that agile movement is possible.

It is preferable to place a resin cloth-like body covering the plate-like object and the shock absorbing member, and sew the cloth-like body to the midsole to fix the plate-shaped object and the shock absorbing member to the midsole. ..

The cloth-like body is preferably composed of, for example, a resin such as polyester, polyethylene (PE), polypropylene (PP), or polyurethane (PU).

The cloth-like body that covers the plate-like object and the shock absorbing member is preferably mesh-shaped. As a result, the breathability and drainage of the shoe can be improved.

The characteristic parts of the running shoes and the volleyball shoes according to the present invention have been described above.

Next, other parts constituting the shoe will be described.

In addition to the midsole, the sole of a shoe is often composed of an outsole and an insole. In addition, shoes have an upper formed on the sole. The upper is a member that wraps the instep.

(Outsole)
The outsole is formed below the midsole and is the contact patch of the shoe, and is required to have grip on the road surface and durability against friction.

The outsole is preferably formed of a material having wear resistance and anti-slip properties rather than the midsole, and is formed, for example, by using synthetic rubber, natural rubber, synthetic resin, or any combination thereof. Is preferable.

The outsole preferably contains graphene. Graphene is a sheet in which carbon atoms are firmly covalently bonded to each other in a honeycomb shape (hexagon). The inclusion of graphene further improves wear resistance.

The outsole and midsole are preferably fixed by adhesive or heat fusion.

(insole)
The insole is an insole that is placed in the part of the shoe that comes into contact with the sole of the foot, and is generally removable afterwards. By inserting an insole, the size can be adjusted and the fit of the shoes can be improved. Further, by providing an insole, shock absorption can be further improved.

The insole is preferably made of a resin, and examples thereof include resins such as polyester, polyethylene (PE), polypropylene (PP), and polyurethane (PU).

It is preferable that the insole is formed with a through hole. As a result, the breathability and drainage of the shoes can be improved.

The number of through holes formed in the insole may be one, but is preferably two or more, more preferably three or more, preferably eight or less, and more preferably six or less.

(upper)
The upper is preferably formed of a resin, and examples thereof include resins such as nylon, polyester, polyethylene (PE), polypropylene (PP), and polyurethane (PU).

The upper is preferably mesh-shaped. As a result, the breathability of the shoe can be improved.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by the following Examples, and the present invention shall be carried out with modifications to the extent that it can be adapted to the gist of the above and the following. Are also possible, all of which are within the technical scope of the invention.

[Running shoes]
The effect of the runner's shoes on the pitch and step length during running was evaluated.

The runners are four men in their twenties who run 10km within 35 minutes by forefoot running or midfoot running, all wearing less slack wear (weak compression wear) and socks. I put on my shoes without. The size of the shoes is 27 cm. The following three types of shoes were used.

(Shoes Aa)
Commercially available running shoes were used for comparison. In this running shoe, a plate made of thermoplastic polyurethane (TPU) and EVA are laminated as a midsole on the rubber of the outsole. It does not have a plate-like material containing a low melting point resin component of a thermoplastic resin and a high melting point resin component of a thermoplastic resin.

(Shoes Ab)
Descente shoes were used. As shown in FIG. 1, the shoe Ab is formed above the midsole, a shock absorbing member that is formed above the midsole and narrower than the width of the midsole, and above the shock absorbing member, and is formed above the midsole. The width is narrower than the width of the above, and has a plate-like substance containing a low-melting-melt resin component of a thermoplastic resin and a high-melting-melting resin component of a thermoplastic resin. The material of the midsole was EVA, and the thickness change rate was 50.0%.

The shock absorbing member uses PORON (trade name) manufactured by Rogers INOAC Corporation, which is a low thickness change rate shock absorbing member, on the rear side (that is, the heel side) from the midpoint in the length direction of the midsole. EVA with a thickness change rate of 48.9% was used as the second shock absorbing member on the front side of the midpoint in the length direction of the above. The thickness change rate of PORON was 0%.

As the plate-shaped product, KaRVO (trade name) manufactured by Diatex Co., Ltd. was used. The thickness of the plate-like material was 0.9 mm. As shown in FIG. 1, the plate-shaped object extends in the length direction including the position facing the arch of the shoe wearer, and is convex downward to the position facing the arch of the shoe wearer. It is shaped and has grooves 31a and 31b extending in the length direction of the shoe. The number of convex grooves was two, and the length of the convex grooves was 11 cm, the width of the convex grooves was 5 mm, and the depth of the convex grooves was 1.5 mm. Further, as shown in FIG. 1, the plate-shaped object has a downwardly convex groove 31c on the front side of the midpoint in the length direction. The length of the convex groove was 5 cm, the width of the convex groove was 5 mm, and the depth of the convex groove was 1.5 mm.

(Shoes Ac)
The shoe Ac is a shoe obtained by removing a plate-like material containing a low melting point resin component of a thermoplastic resin and a high melting point resin component of a thermoplastic resin from the shoe Ab.

Multiple reflective markers were attached to the runner's body and shoes, and the runner's body and shoes were run on the force plate, and the pitch and step length during running were measured. The mileage per run was 60 m, four force plates were arranged in the running direction near the center of 30 m, and the shoes ran 7 to 10 times per pair of shoes. As the force plate, "TF-90100" manufactured by Tech Gihan Co., Ltd. was used. The analysis frequency was 1000 Hz. The movement of the runner was measured using a three-dimensional motion capture system "Vicon (registered trademark)" manufactured by VICON. The analysis frequency in Vicon (registered trademark) was set to 250 Hz. The running speed was measured using a phototube (10 m) manufactured by MICRO GATE.

The running speed of the runners was set to the race pace in each person's 10km run.

The step length means the distance measured from the position where one foot touches the road surface as the start point and then the position where the other foot touches the end point. The stride corresponds to a distance twice the step length, starting from the position where one foot touches the road surface, then the other foot once touches the road surface, and then one foot again. It means the distance from the position of reaching the road surface as the end point.

The results of measuring the pitch and the step length are shown in FIGS. 3 to 6. In FIGS. 3 to 4, the results of shoes Aa are shown by white triangles (Δ), the results of shoes Ab are shown by black circles (●), and the results of shoes Ac are shown by black triangles (▲).

As is clear from FIGS. 3 to 6, the pitch during running is relatively larger and the step length during running is relatively longer when wearing shoes Ab than when wearing shoes Aa or Ac. .. Therefore, the running speed is relatively higher when the shoe Ab is worn than when the shoe Aa or the shoe Ac is worn.

[Volleyball shoes]
The effects of the shoes worn by the subjects on the trajectory of the center of gravity during running, the horizontal impulse, and the step length were evaluated.

The subjects were three men in their twenties who ran 10 km in 40 to 50 minutes by forefoot running or midfoot running, all wearing less slack wear (weak compression wear) and wearing socks. I wore shoes without wearing them. The size of the shoes is 27 cm. The following two types of shoes were used.

(Shoes Ba)
Desant shoes, formed above the midsole and above the midsole, narrower than the width of the midsole, and contain a low melting point resin component of the thermoplastic resin and a high melting point resin component of the thermoplastic resin. It has a plate-shaped material and a shock absorbing member formed above the plate-shaped material and narrower than the width of the midsole. The material of the midsole was EVA, and the thickness change rate was 50.0%.

As the plate-shaped product, KaRVO (trade name) manufactured by Diatex Co., Ltd. was used. The thickness of the plate-like material was 0.6 mm. As shown in FIG. 1, the plate-shaped object extends in the length direction including the position facing the arch of the shoe wearer, and is convex downward to the position facing the arch of the shoe wearer. It is shaped and has a groove 31a extending in the length direction of the shoe. That is, in shoe Ba, the number of convex grooves is one, the length of the convex grooves is 11 cm, the width of the convex grooves is 5 mm, and the depth of the convex grooves is 1.5 mm. It was. Further, as shown in FIG. 1, the plate-shaped object has a downwardly convex groove 31c on the front side of the midpoint in the length direction. The length of the convex groove was 5 cm, the width of the convex groove was 5 mm, and the depth of the convex groove was 1.5 mm.

The shock absorbing member uses PORON (trade name) manufactured by Rogers INOAC Corporation, which is a low thickness change rate shock absorbing member, on the rear side (that is, the heel side) from the midpoint in the length direction of the midsole. EVA with a thickness change rate of 48.9% was used as the second shock absorbing member on the front side of the midpoint in the length direction of the above. The thickness change rate of PORON was 0%.

(Shoes Bb)
As a comparison target, the shoe Ac of the above running shoes was used.

Multiple reflective markers were attached to the subject's body and shoes, and the vehicle ran on the force plate to measure the trajectory of the center of gravity during travel, the horizontal impulse, and the step length. The mileage per run was 60 m, four force plates were lined up in the running direction near the center of 30 m, and the shoes ran 23 to 25 times per pair of shoes. As the force plate, "TF-90100" manufactured by Tech Gihan Co., Ltd. was used. The analysis frequency was 1000 Hz. The movement of the runner was measured using a three-dimensional motion capture system "Vicon (registered trademark)" manufactured by VICON. The analysis frequency in Vicon (registered trademark) was set to 250 Hz. The running speed was measured using a phototube (10 m) manufactured by MICRO GATE.

As for the running speed of the subjects, the number of runs 1 to 20 times was set as the race pace in each person's 10 km run, and the number of runs 1 to 5 times was set as the last spurt at a faster pace than the race pace in each person's 10 km run.

The impulse in the horizontal direction means the propulsive force (force to move forward).

The step length means the distance measured from the position where one foot touches the road surface as the start point and then the position where the other foot touches the end point. The stride corresponds to a distance twice the step length, starting from the position where one foot touches the road surface, then the other foot once touches the road surface, and then one foot again. It means the distance from the position of reaching the road surface as the end point.

As a result of measuring the trajectory of the center of gravity, it was found that the position of the waist was raised by about 1 cm in the height direction when wearing shoes Ba than when wearing shoes Bb. Therefore, it was found that wearing shoes Ba can guide the impact of landing in the height direction and convert it into jumping force rather than wearing shoes Bb.

As a result of measuring the impulse in the horizontal direction, the impulse in the horizontal direction was about the same regardless of whether the shoe Ba was worn or the shoe Bb was worn, or the impulse in the shoe direction tended to be slightly larger.

As a result of measuring the step length, the step length tended to be the same regardless of whether the shoe Ba was worn or the shoe Bb was worn, or the step length tended to be slightly longer when the shoe Ba was worn.

1 Midsole 2a Shock absorbing member 2b Second shock absorbing member 3 Plate-shaped objects 11a to 11e, 21a, 21b Through holes 31a to 31c Grooves

Claims (19)

With the mid sole
A shock absorbing member formed above the midsole and narrower than the width of the midsole.
It is formed above the shock absorbing member, has a width narrower than the width of the midsole, and has a plate-like material containing a low melting point resin component of a thermoplastic resin and a high melting point resin component of a thermoplastic resin. ,
The impact absorbing member, Ri is 0-60% der thickness change rate is measured under the following conditions,
The shock absorbing member is arranged at least behind the midpoint in the length direction of the midsole.
A second shock absorbing member having a thickness change rate larger than the thickness change rate of the shock absorbing member is arranged on the front side of the shock absorbing member.
The impact absorbing member and the second shock absorbing member, the shoe Running characterized that you have been placed in contact with each other side by side along the length of the midsole.
(Thickness change rate)
The thickness change rate is determined by measuring the thickness d _1, in a compressed state of 50% based on JIS K6400- 4, at 70 ° C., allowed to stand 22 hours, then released after the lapse of 30 minutes, measuring the thickness d _{1 The thickness d 2} is measured at the specified location and calculated based on the following formula.
Thickness change rate (%) = [(d ₁ − d ₂ ) / d ₁ ] × 100 The running shoe according to claim 1, wherein the shock absorbing member is arranged in a recess formed on the upper surface side of the midsole. The running shoe according to claim 1 or 2, wherein at least a part of the plate-shaped material is arranged in a recess formed on the upper surface side of the midsole. The running shoe according to any one of claims 1 to 3, wherein the length of the plate-shaped object is 30% or more with respect to the length of the midsole. The running shoe according to any one of claims 1 to 4, wherein the thickness of the plate-shaped object is 0.4 to 1.7 mm. The plate-like object extends in the length direction including at least a position facing the arch of the shoe wearer.
The running shoe according to any one of claims 1 to 5, which has a groove that is convex downward and extends in the length direction of the shoe at a position facing the arch of the shoe wearer. The running shoe according to any one of claims 1 to 6, wherein the plate-shaped object has a downwardly convex groove on the front side of the midpoint in the length direction. The running shoe according to claim 7, wherein the downward convex groove is formed so as to extend in the length direction of the shoe. The midsole has a thickness change rate of 45 to 55%.
The shock absorbing member is a low thickness change rate shock absorbing member having a thickness change rate of 0 to 5%.
The running shoe according to any one of claims 1 to 8, wherein the second shock absorbing member has a thickness change rate of 45 to 55%. With the mid sole
A plate-like material formed above the midsole and narrower than the width of the midsole and containing a low melting point resin component of a thermoplastic resin and a high melting point resin component of a thermoplastic resin.
It has a shock absorbing member that is formed above the plate-like material and has a width narrower than the width of the midsole.
The shock absorbing member is a volleyball shoe characterized in that the thickness change rate measured under the following conditions is 0 to 60%.
(Thickness change rate)
The thickness change rate is determined by measuring the thickness d _1, in a compressed state of 50% based on JIS K6400- 4, at 70 ° C., allowed to stand 22 hours, then released after the lapse of 30 minutes, measuring the thickness d _{1 The thickness d 2} is measured at the specified location and calculated based on the following formula.
Thickness change rate (%) = [(d ₁ − d ₂ ) / d ₁ ] × 100 The volleyball shoe according to claim 10 , wherein the plate-shaped object is arranged in a recess formed on the upper surface side of the midsole. The volleyball shoe according to claim 10 or 11 , wherein at least a part of the shock absorbing member is arranged in a recess formed on the upper surface side of the midsole. The volleyball shoe according to any one of claims 10 to 12 , wherein the length of the plate-shaped object is 30% or more with respect to the length of the midsole. The volleyball shoe according to any one of claims 10 to 13 , wherein the thickness of the plate-shaped object is 0.4 to 1.7 mm. The plate-like object extends in the length direction including at least a position facing the arch of the shoe wearer.
The volleyball shoe according to any one of claims 10 to 14 , which has a groove that is convex downward and extends in the length direction of the shoe at a position facing the arch of the shoe wearer. The volleyball shoe according to any one of claims 10 to 15 , wherein the plate-shaped object has a downwardly convex groove on the front side of the midpoint in the length direction. The volleyball shoe according to any one of claims 10 to 16 , wherein the shock absorbing member is arranged at least behind the midpoint in the length direction of the midsole. The volleyball shoe according to claim 17 , wherein a second shock absorbing member having a thickness change rate larger than the thickness change rate of the shock absorbing member is arranged on the front side of the shock absorbing member. The midsole has a thickness change rate of 45 to 55%.
The shock absorbing member is a low thickness change rate shock absorbing member having a thickness change rate of 0 to 5%.
The volleyball shoe according to claim 18 , wherein the second shock absorbing member has a thickness change rate of 45 to 55%.

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