JPH10309201A - Lightweight shoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide proof lightweight shoe without deviated wearing, by equipping an enhancing sole part on the grounding face of the sole main parts corresponding to a floor reaction force acting point trajectory which is drawn by showing floor reaction force acting points by times by converting the force loaded on the whole shoe sole during walking or running to one equivalent force. SOLUTION: Floor reaction force is the force which is applied on the whole parts of a shoe sole 3 wore by a user during walking or running, measured by a force platform and converted to one equivalent force by calculation and is expressed in a three dimensional vector. This lightweight shoe 5 has an enhancing sole part 2 composed of a wear resistant material on the grounding face side. The enhancing sole part 2 is set on the grounding face of the sole main part 1 corresponding to a floor reaction force acting point trajectory shown on the shoe sole drawn by showing floor reaction force acting points by times by converting the force loaded on the whole shoe during walking or running wearing the shoe to one equivalent force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to shoes used for walking and running such as business shoes and casual shoes, and more particularly to shoes that are lightweight, do not lose weight, and are non-slip.

[0002]

2. Description of the Related Art Conventionally, a shoe sole having a light weight has a sole made of a lightweight sponge body, a midsole made of a sponge body, and an entire ground surface side covered with a solid body.
In addition, a midsole formed of a sponge body, and a toe portion, a tread portion, and a heel portion on the ground surface side covered with a solid body, or the like is used. The sponge body usually has rubber, EVA, polyurethane, PVC having a specific gravity of 0.2 to 0.9.
Elastomer foams are used. The solid body is made of an elastomer made of synthetic rubber or polyurethane having abrasion resistance and anti-slip properties.

[0003]

On the other hand, when investigating how to reduce the sole of actually used shoes, it is found that there are few cases where the entire contact surface is uniformly worn down, and the shoes are unevenly reduced. There are many things. Among them, there is a method in which the bottom is reduced locally, that is, a partially reduced state, and there is a possibility of causing injury.

[0004] Then, when investigating which part of the sole contact surface is easy to decrease, it was found that there is a great difference in the state of exercise, that is, the place where the decrease occurs depending on the way of walking or running.
When wearing shoes, walking or running, the floor reaction force is obtained by the force platform, and the point of action of the floor reaction force is displayed in the form of a shoe sole at intervals of time. A locus of force acting point is obtained.

Here, the floor reaction force is a force obtained by replacing the force applied to the entire sole of the shoe sole from the ground contact portion during walking or running with the shoe into an equivalent force. This is the point where the floor reaction force acts. When the action point of the floor reaction force of the subject wearing the casual shoes when walking is displayed in a shoe sole shape,
The locus of the shoe sole used by the subject and the locus of the point of action of the floor reaction force coincided well, and it was confirmed that the closer the action point of the floor reaction force was, the more intense the abrasion was.

[0006] Since the soles of ordinary shoes are designed without considering the above-mentioned movement of the wearer, the soles are liable to be reduced, and are not reduced in a well-balanced manner. If the worn shoes are worn for a long period of time, a load is applied to joints such as knees, and the injury is likely to occur.
It is an object of the present invention to provide a shoe which does not lose weight by knowing the movement of the wearer during exercise, and which is excellent in slip resistance.

[0007]

SUMMARY OF THE INVENTION A lightweight shoe according to the present invention is a shoe provided with a sole reinforcing portion made of a wear-resistant material on the ground contact side of a sole portion made of a lightweight material. When the shoe sole reinforcing portion is worn or walking, the acting point of the floor reaction force in which the force applied to the entire shoe sole is replaced with an equivalent force is displayed in the form of a sole every time. It is characterized in that it is arranged on the ground contact surface of the main part of the shoe sole corresponding to the locus of the floor reaction force acting point.

Further, the lightweight shoe according to the present invention is a shoe provided with a sole portion made of a lightweight material and a sole reinforcing portion made of a slip-resistant design or a slip-resistant material on the grounding surface side. The floor reaction force, in which the point of action of the floor reaction force where the force applied to the entire sole of the shoe is replaced by an equivalent force when walking or walking while wearing shoes is displayed every hour, The present invention is characterized in that it is disposed on the contact surface of the main part of the sole and on the peripheral edge with the outer step on the contact surface of the main part of the sole corresponding to the locus of action.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The lightweight material constituting the main part of the sole of the present invention is preferably a foamable elastomer.
Foams such as resin, polyvinyl chloride resin and polyurethane resin are used. The specific gravity of the foam is preferably 0.6 or less, more preferably 0.3 or less.

[0010] The shoe sole reinforcing material of the present invention uses an elastomer having good wear resistance. Preferred elastomers include rubber and polyurethane resins, which are made of solid bodies. The degree of abrasion resistance depends on the frequency of wear, but when walking or running is assumed, a wear volume of 10 CC / HP · hr or less when measuring Williams abrasion is practically sufficient.

Further, the sole material of the present invention is kneaded with a rubber member having an anti-slip design, an EVA resin, a polyvinyl chloride resin, a polyurethane resin, or the like, or a glass member, an aramid fiber, a nylon fiber, or the like. Non-slip materials can be used.

The floor reaction force in the lightweight shoe of the present invention is defined as the force applied to the entire sole of a shoe when walking, running or running, measured by a force platform, and calculated as an equivalent force. Is expressed as a three-dimensional vector. When this floor reaction force is measured in a short time of, for example, one hundredth of a second, and the point of action of the floor reaction force is displayed in the form of a shoe sole, a specific response corresponding to the movement of the subject as shown in FIGS. A trajectory is obtained. This locus is referred to as a floor reaction force acting point locus. The floor reaction force acting point locus displayed in the shape of a sole corresponds to a line connecting the center points of the forces applied to the sole during exercise.

The locus of the floor where the point of action of the floor reaction force during walking is displayed along the center portion of the shoe shape that is approximately divided into two in the longitudinal direction as shown in FIG. During walking, it can be seen that the robot lands from the rear end of the shoe, gradually advances to the center, and moves off the ground around the tip of the metatarsal bone.

When the heel striker runs,
Following the locus of the floor reaction force action point as shown in FIG. 6, when running, land on the lateral edge of the heel of the shoe sole, move toward the center, then move to the front, and move the ground around the tip of the metatarsal bone. You can see that they are moving away. FIG. 7 and FIG. 8 are trajectories in which the floor reaction force acting points during the running of the mid striker and the forefoot striker are displayed in the form of a shoe sole, and the landing and kicking are performed in the front half of the sole. Recognize.

A lightweight shoe according to the present invention is a shoe comprising a sole portion made of a lightweight material and a sole reinforcing portion made of an abrasion-resistant material on its grounding surface side. The floor reaction force action point in which the point of action of the floor reaction force obtained by replacing the force applied to the entire shoe with one equivalent force during walking or running while wearing shoes is displayed in the form of a sole every time. The present invention is characterized in that the shoe sole is disposed on the ground contact surface of the main part of the sole corresponding to the trajectory.

Further, the lightweight shoe according to the present invention is a shoe provided with a sole portion made of a lightweight material and a sole reinforcing portion made of a slip-resistant design or a slip-resistant material on the grounding surface side. The floor reaction force, in which the point of action of the floor reaction force where the force applied to the entire sole of the shoe is replaced by an equivalent force when walking or walking while wearing shoes is displayed every hour, The present invention is characterized in that it is arranged on the contact surface of the main part of the shoe sole and on the peripheral edge with the outer step on the contact surface of the main part of the sole corresponding to the action point trajectory. FIG. 2 shows a specific example in which the sole reinforcing portion is disposed on the ground contact surface of the sole of the sole.
4 to 10 and will be described with reference to the drawings.

FIG. 1 shows an example of a shoe suitable for walking, in which a sole reinforcing portion is arranged on a ground contact surface of a main part of the sole in correspondence with the entire locus of the floor reaction force acting point. .

FIGS. 2 and 3 show an example of a shoe suitable for running. The sole of the shoe sole is reinforced with the sole of the sole corresponding to the location where the floor reaction force action points on the floor reaction force action point locus are dense. It is arranged on the grounding surface of the section.

FIG. 4 shows an example of a shoe suitable for walking. The sole reinforcing portion corresponds to the locus of the floor reaction force acting point, and the leading portion, the tread portion, and the heel of the main portion of the shoe sole on the ground contact surface. It is arranged in the department.

FIG. 10 shows an example of a shoe suitable for walking. The sole of the shoe is a sole with a heel, and the sole reinforcing portion is provided on the ground contact surface of the main portion of the sole corresponding to the locus of the floor reaction force acting point. It is located at the center of the tread, the outer tread, and the heel.

When the sole reinforcing portion is disposed on the grounding surface of the sole of the sole, a recess is preferably provided in the grounding surface of the sole of the sole, and the sole reinforcing portion is buried in the recess. The surface of the sole reinforcing portion may be approximately the same height as the tread of the main portion of the sole, or may be embedded so as to protrude. Further, a design for imparting anti-slip properties may be provided on the surface of the sole reinforcing portion. The sole reinforcing portion is made of a wear-resistant elastomer formed into a sheet and cut into a predetermined shape, and its thickness may be 5 mm or less.

[0022]

【Example】

[Example 1] [Preparation of sole] An EVA sponge having a specific gravity of 0.35 and a hardness (type C) of 60 degrees was used for a main part of the sole. In addition, a wear-resistant rubber sheet having a wear resistance of 3 mm was prepared for the shoe sole reinforcing portion. This rubber sheet had a wear volume of 3 CC / HP · hr when measuring Williams wear.

The EVA sponge was used to form a sole portion of a sole having a concave portion having a depth of 3 mm at the tip of the sole contact surface, the tread center, and the heel. Next, the abrasion-resistant rubber sheet was cut into substantially the same shape as the recessed portion of the above-mentioned main part of the shoe sole, thereby producing a reinforcing part for the shoe sole. The adhesive treatment is performed on the recessed portion of the shoe sole main portion with the heel and the shoe sole reinforcing component,
A shoe sole reinforcing component was fitted into the recessed portion and bonded and pressed to obtain a shoe sole with a heel as shown in FIG. 9 (b).

[Preparation of shoes] A leather cover is prepared, an insole material is temporarily fixed on the lower surface of the last, the cover is suspended on the last, heat set, and roughing is performed on the lower surface of the cover. Apply an adhesive, press the bottom of the shoe sole, and after finishing,
The mold was removed to obtain a lightweight shoe shown in FIG. This lightweight shoe was very light and good looking. Even if this shoe was used for walking for more than six months, it was light and comfortable, and it was a durable shoe with no loss.

[Example 2] [Preparation of shoes] A foamed polyurethane obtained by mixing and stirring a polyol component and a polyisocyanate component and foam-curing the main portion of the shoe sole is used.
The hardness (C type) at that time was set to 70 degrees. In addition, a solid rubber sheet having a hardness (JIS A) of 55 degrees and a non-slip design on the ground contact surface side was prepared for the sole reinforcement portion.

After hanging the bag cover having the inner bottom sewn to the leather cover on the last, heat setting was performed, and the bonding portion with the bottom of the lower surface of the cover was roughed. Next, an openable shoe molding mold combining the upper mold and the lower mold is prepared, the upper mold is opened, and the last in which the cover is suspended is placed on the upper mold, and the cavity of the lower mold is placed. After placing the solid rubber sheet with the anti-slip design in the mold inside the part, a liquid foamed polyurethane mixture was cast, foamed and cured to form a foamed polyurethane bottom on the lower surface of the shell. The shoe sole at this time is as shown in FIG.

[0027]

The lightweight shoe according to the present invention is a shoe having a wear-resistant shoe sole reinforcing portion on the ground contact surface of the sole of the shoe sole, which is made of a lightweight material. At this time, the sole of the sole is provided in correspondence with the locus of the center point of the force applied to the sole of the shoe, that is, the locus of the floor reaction force acting point. Reduction can be prevented.
As a result, even when the shoe is used for a long period of time, it is possible to prevent the injury to the foot due to the loss of the sole of the shoe.

The lightweight shoe according to the present invention is a shoe provided with a sole-reinforced portion made of a slip-resistant design or an anti-slip material on a ground contact surface of a sole portion made of a light-weight material. Or, when the shoe is running, since the sole corresponding to the locus of the center point of the force applied to the sole, that is, the locus of the floor reaction force acting point and the peripheral part with the outer step are provided with the sole reinforcing portion, it is easy to slip. It can be safely worn on road surfaces. And since unnecessary parts do not need to be made of abrasion-resistant material or anti-slip material of high specific gravity, it is possible to use a lighter material with a larger volume for the main part of the shoe sole, and it is light and comfortable Shoes can be provided.

[Brief description of the drawings]

FIG. 1 is a bottom view and a cross-sectional view taken along line AA of a shoe sole 1 according to the present invention.

FIG. 2 is a bottom view and a sectional view taken along line BB of a shoe sole 2 of the present invention.

FIG. 3 is a bottom view and a cross-sectional view taken along the line CC of the shoe sole 3 of the present invention.

FIG. 4 is a bottom view of the sole 4 of the present invention and a cross-sectional view taken along the line DD.

FIG. 5 is a floor reaction force action point locus generally displayed in a shoe shape during walking.

FIG. 6 is a floor reaction force action point locus displayed in a shoe sole shape during running of a general heel striker type runner.

FIG. 7 is a floor reaction force action point locus displayed in a shoe sole shape during running of a general midfoot striker type runner.

FIG. 8 is a floor reaction force action point locus displayed in a shoe sole shape when a general forefoot striker type runner is running.

FIG. 9 is a perspective view and a bottom view of the lightweight shoe according to the first embodiment of the present invention.

FIG. 10 is a bottom view and a cross-sectional view taken along line EE of Embodiment 2 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main part of shoe sole 2 Sole reinforcement part 3 Sole 4 Locus of floor reaction force action point 5 Lightweight shoe

Claims (6)

[Claims] 1. A shoe comprising: a sole portion made of a lightweight material; and a sole reinforcing portion made of a wear-resistant material on the grounding surface side thereof. At the time of running or wearing shoes, the point of action of the floor reaction force, in which the force applied to the entire sole is replaced by a single equivalent force, is displayed in the form of a sole at each time, corresponding to the floor reaction force action point locus. A lightweight shoe characterized in that the shoe is disposed on a tread of a main part of the sole. 2. A shoe comprising: a sole portion made of a lightweight material; and a sole reinforcement portion made of an anti-slip design or an anti-slip material on a contact surface side of the sole. At the time of running or wearing shoes, the point of action of the floor reaction force, in which the force applied to the entire sole is replaced by a single equivalent force, is displayed in the form of a sole at each time, corresponding to the floor reaction force action point locus. A light shoe characterized in that the shoe is disposed on a tread surface of the sole portion of the sole and on a peripheral edge with an outer step on the tread surface of the sole portion of the sole. 3. The sole of the shoe sole is a foamable elastomer having a specific gravity of 0.6 or less, and the sole of the shoe sole is an elastomer having a wear volume of 10 CC / HP · hr or less when measuring Williams wear. The lightweight shoe described. 4. The floor sole-reinforcement portion according to claim 1, wherein the floor-reaction-force application point locus is arranged corresponding to a location where the floor-reaction-force application points are dense. Lightweight shoes. 5. The method according to claim 1, wherein the sole reinforcing portion is disposed at least at one of a leading end, a tread portion, and a heel portion of a sole contacting surface of the sole corresponding to the locus of the floor reaction force acting point. The lightweight shoe according to claim 1 or 2, characterized in that: 6. The sole reinforcing portion is buried on the ground contact surface side of the sole sole portion, and the surface of the sole reinforcing portion has a height substantially equal to or protrudes from the surface of the sole sole portion. The lightweight shoe according to claim 1 or 2, wherein the shoe is one of: