KR100943088B1 - Insole for sports shoes having fiber reinforced plastics - Google Patents

Abstract

The present invention relates to insoles used in sports shoes, specifically in the shape of a person's soles, sports insoles comprising a plurality of fiber-reinforced plastic layer laminated over the entire area of the insole It is about.

According to the present invention, when the insole is manufactured using the fiber reinforced plastic, the shoe itself is less expensive than the fiber reinforced plastic, and it is easy to manufacture to match the shape of the foot of the person, so that it closely adheres to the human foot. There is an advantage that can be made to better reflect the characteristics of the fiber-reinforced plastic to improve the performance.

Insole, Fiber Reinforced Plastic

Description

Insoles for sports shoes having fiber reinforced plastics

The present invention relates to an insole used for sports shoes, and more particularly, to an insole for sports shoes with fiber reinforced plastic.

The most important thing for improving the results of sports in sports competition is the ability of athletes to play sports, but in recent years, the importance of sportswear, shoes, and equipment used by athletes in addition to their own ability has also been highlighted.

In particular, sports shoes take a great deal of weight in improving sports performance in various sports events such as athletics, baseball, and golf.

Wearing a functionally well-designed sports shoe can quickly transfer human power to the ground, while using the elasticity of the sports shoe itself to add more speed and power, while minimizing torsion in the ankles and soles. In the game, there is an effect that can prevent the twisting of the foot in this rotational motion through sports shoes.

Accordingly, a lot of investment is being made in researching materials and designs of sports shoes.

However, most of these studies are focused on the study of the shoe itself, and the research on the insole (insole, innersole) that is inserted into the interior of the shoe is insufficient.

Insole research is mainly limited to the field of shock absorption or body correction, and has not been studied in the field of improving sports performance in sporting events.

On the other hand, fiber-reinforced plastics (FRP) have recently been spotlighted as ultra-light and high strength materials. The fiber-reinforced plastics can be molded at room temperature and normal pressure, are resistant to corrosion, and are light and have superior advantages over other materials such as tensile strength and impact resistance.

In particular, carbon fiber reinforced plastics (CFRP) using carbon fibers have received much attention because they are lighter than other fiber-reinforced plastics and have a much higher strength per unit weight than other materials.

Due to the advantages of such fiber reinforced plastics, it has been spotlighted as a building material, a hull of a yacht or a small ship, a bathtub, a container, a helmet, a base of an airplane, etc., and recently, it is applied to leisure sports goods such as black shafts, fishing rods, tennis rackets of golf clubs, etc. There are also many attempts to apply.

However, in the case of insoles used in sports shoes, there is no research on introducing fiber-reinforced plastics into insoles because there is a concept that should be soft for shock absorption.

In order to solve the above problems, an object of the present invention is to provide an insole for sports shoes made of fiber-reinforced plastics to improve the athletic performance of a sporting event.

In order to achieve the above object, the present invention is an insole used in sports shoes, the shape of the soles of the person, sports, characterized in that provided with a plurality of fiber-reinforced plastic layer laminated over the entire area of the insole Provide a fire insole.

Here, the portion of the fiber-reinforced plastic layer corresponding to the sole of the sole of the sole is preferably arcuate according to the shape of the sole of the sole so that the elasticity thereof is used to improve performance.

In addition, the insole is preferably provided with a fiber-reinforced plastic sidewall formed to a predetermined height along the outside of the human foot to the outer surface of the insole to prevent the torsion of the foot.

The insole may further include a fiber-reinforced plastic sidewall formed between the big toe and the index toe at a predetermined height in a region corresponding between the big toe of the human foot and the index toe of the insole.

In addition, the insole is preferably formed so that the area in contact with the toes of the human foot of the insole surrounds the toes.

In addition, the insole is preferably to vary the number of lamination of the fiber-reinforced plastic for each region, or to insert the foreign matter so as to vary the strength and the like depending on the part.

According to the present invention, when the insole is manufactured using the fiber reinforced plastic, the shoe itself is less expensive than the fiber reinforced plastic, and it is easy to manufacture to match the shape of the foot of the person, so that it closely adheres to the human foot. There is an advantage that can be made to better reflect the characteristics of the fiber-reinforced plastic to improve the performance.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is characterized in that the insole is inserted into the sports shoe made of fiber-reinforced plastic.

As described above, fiber-reinforced plastics are lightweight, yet have excellent rigidity and elasticity, so they have recently been used for many purposes. However, they have been mainly researched to produce products that are light and shock-resistant. There is no research to improve the performance by using the elasticity, rigidity, etc. of plastics.

In particular, the use of insoles used in sports shoes, especially sports shoes, has not been studied.

If fiber reinforced plastic is used in insoles for sports shoes, the resilience of the fiber reinforced plastic can be used to increase the elasticity of athletes wearing sports shoes, thereby contributing to the improvement of athletic performance such as jumping force, quickness, occlusality, and stability. It is possible to prevent injuries, such as twisting of the foot by using the power of the person can be transmitted to the ground quickly and without loss.

In addition, the shoe itself is made of fiber reinforced plastic, which is less expensive and can be easily manufactured to match the shape of a person's foot. There is an advantage that can be reflected.

Even if a shoe is manufactured according to the shape of a person's foot, it may not be in close contact with the foot and may have a play when the actual game is intense. Also, since an insole is inserted between the shoe and the foot, the human force is not directly transmitted. However, the elasticity of the shoe is not transmitted to the person's feet, so it is inevitably disadvantageous in sports games where speed is important. However, when the insole itself is manufactured using fiber-reinforced plastic, it is effective to solve the disadvantage. have.

1 is a flow chart illustrating a method for manufacturing an insole using a fiber-reinforced plastic.

First, a mold according to the shape of the foot is manufactured (101).

In the case of the insole, it is preferable to be manufactured so as to be in close contact with the foot of the person to use, to produce a mold according to the shape of the foot of the person to use the insole and accordingly to produce a sports shoe insole.

At this time, if the top layer of the insole to be made of fiber reinforced plastic layer is to be used, or if a foreign material layer of equal thickness is to be laminated on the fiber reinforced plastic layer, the mold is formed according to the shape of the foot of the person to be used. However, if it is not intended to add foreign matters such as cork, sponge, cloth, etc., which are not fibre-reinforced plastics, to a part of the uppermost layer, it is preferable to manufacture a mold in consideration of the foreign matter layer.

Another method of adding a foreign material other than fiber reinforced plastic to a part of the top layer of the insole is to manufacture a mold according to the shape of the human foot, and then add a foreign material in advance in the process of laminating the fiber reinforced plastic and then stack it. There is also.

When the mold is manufactured, the fiber-reinforced plastic is laminated on the sole portion of the manufactured mold (102). The fiber-reinforced plastic 200 is stacked on the mold 210 as shown in FIG. 2.

When laminating fiber-reinforced plastic, the fiber layer and the resin layer are laminated alternately. Moreover, it is also possible to use, after depositing a fiber layer in resin liquid.

After lamination in this way, the resin (plastic) of the fiber-reinforced plastics 200 wound around the mold 210 functions as an adhesive, and each fiber-reinforced plastic layer is bonded to and fixed to each other.

Insoles made of fiber-reinforced plastics may require different stiffness or elasticity, depending in part on the sport used.

For example, sports events in which the front elasticity of the insole has a great influence on athletic performance include short-distance sports, long-distance sports, soccer, volleyball, basketball, rock climbing, and skiing. Sports events that require more than elasticity include rock climbing.

In addition, sports events in which the elasticity of the middle portion of the insole affects athletic performance include land long-distance sports, javelin throwing, volleyball, basketball, baseball, fencing, etc. Sporting events include climbing (especially in winter), skating (ice and inline), snowboarding and cycling.

In addition, sports events in which the stiffness of the outer wall portion of the insole affects athletic performance include sports requiring shot motion such as shot put (athlete), golf, baseball (for batsman), field hockey and snowboarding.

In addition, sports events in which the stiffness of the front wall of the insole affects athletic performance include soccer and rock climbing.

When manufacturing the insole, it is preferable to adjust the elasticity and rigidity of each part to reflect the functional characteristics of the sport as described above.

In the case of fiber-reinforced plastics, the stiffness and elasticity increase when the number of layers is increased, and the stiffness increases when the resin content is high even when the number of layers is increased, and even when the pressure is increased after lamination. Will increase.

In addition, stack the fiber-reinforced plastic with the same number of layers, but use carbon fiber-reinforced plastic with stronger yarn strength, such as 12k, for the part that requires more rigidity by varying the type of fiber-reinforced plastic used for each part. The part can also be laminated using other types of fiber-reinforced plastics.

In addition, it is also possible to insert a dissimilar material layer for reinforcing rigidity, such as Kevlar, or insert a dissimilar material layer for absorbing shock, such as cork, sponge, or cloth, between fiber reinforced plastics.

At this time, the heterogeneous material to be inserted may be inserted over the entire surface of the insole, or may be inserted only at a specific portion such as a heel portion.

In addition, if the rigidity, elasticity, etc. is too strong, it may be rather uncomfortable, and in order to weaken the rigidity of a specific region, a hole may be drilled in a portion to weaken the rigidity.

In addition, depending on the use of the insole, the fiber-reinforced plastic may be laminated only along the sole shape of the sole, or the fiber-reinforced plastic may be laminated on the side portion so that sidewalls are formed along the side portions of the foot as well as the sole region.

On the other hand, the resin used in the fiber-reinforced plastics 200 may be both a thermosetting resin and a thermoplastic resin.

As the thermosetting resin, at least one or more of unsaturated polyester and epoxy resin may be used, and as the thermoplastic resin, at least one or more of nylon, polypropylene, polybutylene terephthalate, polyethylene talate, and polycarbonate may be used. .

As the fiber used in the fiber-reinforced plastic 200, carbon fiber, glass fiber, aromatic nylon fiber called Kevlar (trade name of DuPont, USA), aramid fiber, boron fiber, etc. may be used, and preferably carbon fiber may be used. have. Representative carbon fibers include leason-based carbon fibers, PAN (polyacrylonitrile) -based carbon fibers, pitch-based carbon fibers and the like.

In the case of the fiber-reinforced plastic 200, there is also a type (eg Rapid's Araldite, etc.) that is cured at room temperature and atmospheric pressure depending on the type of resin used, but is generally cured at a temperature higher than room temperature.

When lamination of the insole to be produced using the fiber-reinforced plastic is completed (103).

The primary curing process proceeds in a low vacuum at relatively low temperatures. For example, curing can be performed for 10 to 15 minutes at a temperature of 40 to 80 degrees. The relationship between temperature and time is relative, so that if the temperature is increased, the curing is performed for a short time. If the temperature is lowered, the curing is performed for a long time.

The vacuum applied during the first curing is 100 kPa ~ 100 Pa low vacuum, thereby removing the resin (resin).

The method of applying vacuum encloses the mold 210 and the fiber-reinforced plastic layer 200 with a freely deformed film (injecting the mold and the fiber-reinforced plastic layer into an envelope shaped like a film and having a mold shape therein), and surrounding the mold 210 and the fiber-reinforced plastic layer 200. This is done by sucking air through the inlet of the membrane.

The primary curing process is to remove the intermediate intermediate bubbles by rolling, so that the resin is evenly impregnated on the entire surface.

When the resin is impregnated into the fiber layer through the first curing process, the fiber-reinforced plastic is completely cured through the secondary curing process (104).

In this case, curing is carried out for 10 to 15 minutes at a temperature of 150 to 400 degrees under a high vacuum of 0.1 Pa to 100 μPa.

Although the resin undergoes a primary curing process so that the fiber layer is sufficiently impregnated, the primary curing process may be omitted and the curing may be performed only by the secondary curing process.

When the fiber-reinforced plastic is completely cured through the secondary curing process, the mold 210 is detached and then the shape of the external cutting is performed to complete the production of the insole (105).

At this time, by attaching a cork, sponge, cloth, Kevlar or the like to all or a part of the upper or lower portion of the insole can be further enhanced functionality.

Figure 3 shows an example of the insole manufactured by the above method.

As shown in Figure 3, the insole of this embodiment has the same shape as the general insole, the material is characterized in that the fiber-reinforced plastic is laminated in a plurality of layers.

At this time, the fiber-reinforced plastics constituting each layer of the insole of Figure 3 may be laminated in different numbers for each part, the foreign material layer such as cork, sponge, cloth, kevlar between the laminated surface of the laminated fiber-reinforced plastic insole It may be further provided in all or part of the area, and may be further provided outside the laminated surface of the fiber-reinforced plastic as described above.

Another advantage of insoles made by lamination using fiber-reinforced plastics is that even though the number of layers to be laminated is different, the compression is performed under strong pressure (vacuum), so the final product is almost uniform in thickness regardless of the number of layers. It seems.

In the case of lamination with different materials, the thickness is different when lamination is made for each part, and when the shoes are worn, the parts with a large number of laminations may feel unpleasant as if there is something foreign, but in the case of fiber-reinforced plastic Even if the number of layers is different for each part, the user does not feel such foreign object.

On the other hand, as shown in Figure 3, the area corresponding to the core portion of the sole of the insole is preferably formed so that the fiber-reinforced plastic layer of the insole is arched in accordance with the shape of the sole.

The sole portion of the sole has a higher arch shape when not receiving weight, and when the weight is received, the height of the arch is lowered, thereby pressing down the corresponding part of the insole.

4, the elasticity is generated due to the restoring force of the fiber-reinforced plastic, and this elasticity allows the user using the insole to jump higher with the same force than when jumping.

In all shoes that need to lift the feet, such as marathon shoes and hiking boots, the parts that correspond to the soles of the soles of the soles in the insole are arched like the shape of the soles using fiber-reinforced plastics to minimize the user's physical consumption. There is an advantage.

On the other hand, when the user is lifting the heel and the weight is concentrated around the front part of the sole, that is, the toe part as shown in Figure 5, the bent insole is pushed back by the elasticity to be restored again, as in athletics In events where speed is required, it helps the game.

Meanwhile, FIGS. 6 to 8 show examples of sidewalls formed along the outer side of the insole as another example of the insole according to the present invention.

This sidewall serves to prevent torsion in insoles in sports shoes where it is necessary to prevent torsion of the foot, such as baseball, golf, ice skating, and inline skating.

FIG. 6 illustrates a case where sidewalls are formed in the entire insole, and FIG. 7 illustrates an example having fiber-reinforced plastic sidewalls formed at a predetermined height along the outside of the human foot along only the outer surface of the insole, and FIG. The case where the side wall exists only from the heel portion of the lateral side of the foot to the position of the columnar bone is shown.

If the side wall is too high, it is inconvenient to wear, and if the side wall is too low, the effect of preventing torsion is halved, so in the above example, the height of the side wall is preferably between 0.5 cm and 2 cm.

Also, in the case of the area occupied by the sidewall, when the area occupied by the sidewall is small as shown in FIG. 8, the effect of preventing distortion is relatively small, but on the contrary, the utilization of elasticity and the like may be increased, and the area occupied by the sidewall as shown in FIG. In this wide case, the effect of preventing torsion is relatively high, but the utilization of elasticity and the like may be lowered.

The area occupied by the side wall, the height of the side wall may be determined by the type of sports event, the user's preference, and the like.

At this time, the side wall may be composed of only the fiber-reinforced plastic layer, it may be configured in the form of a foreign material such as kevlar inserted between the fiber-reinforced plastic layer.

9 illustrates a case in which foreign matter such as cork, sponge, rubber, or the like is added to a portion of the top layer of the insole as another example of the insole of the present invention.

As shown in FIG. 9, the insole according to the present embodiment adds a foreign material 910 for absorbing shock such as cork and sponge to the top layer of the heel portion of the insole 900 to improve the impact absorption rate. The area is composed of only the fiber-reinforced plastic layer 920 to improve the performance using elasticity and the like.

FIG. 10 illustrates a case in which foreign matter such as cork, sponge, rubber, or the like is added to the entire area of the top layer of the insole as another example of the insole of the present invention.

As shown in FIG. 10, the insole according to the present embodiment adds a foreign material 1010 for shock absorption such as cork, sponge, etc. to the top layer of the insole 1000 to improve the impact absorption rate. It consists of only the fiber-reinforced plastic layer 1020 to improve the performance using elasticity and the like.

11 illustrates a case in which a side wall is formed between the big toe of the person and the index finger of the insole area as another example of the insole of the present invention.

As shown in FIG. 11, when the side wall 1110 is formed in a region between the big toe and the index toe, the foot can be prevented from slipping on the insole even when the shoe does not fit enough to completely fix the human foot.

The height of the side wall 1110 is not particularly limited and may be just such that the side wall 1110 does not protrude from the upper portion of the foot.

12 illustrates a case in which a side wall is formed at the front of the insole as another example of the insole of the present invention.

As shown in FIG. 12, the side wall 1210 in the present embodiment is not merely formed vertically, but is formed like an inner shape of a shoe into which an insole is inserted so as to surround a human toe portion. It is effective to protect against external shock.

1 is a flow chart showing a method for manufacturing the insole using a fiber-reinforced plastic

Figure 2 is an example showing a form in which the fiber reinforced plastic is laminated to the mold

Figure 3 is an embodiment of the insole according to the present invention

4 and 5 are views for explaining an example of the elasticity that can be obtained through the insole of the present invention

6 to 8 are views showing an example in which sidewalls are formed along the outside of the insole as another embodiment of the insole according to the present invention;

9 is a view showing an example in which foreign matter is added to a part of the top layer of the insole as another embodiment of the insole according to the present invention;

Claims (10)

In insoles used for sports shoes, It has the shape of the sole of the person, and has a fiber-reinforced plastic layer laminated in plurality over the entire area of the insole, The portion of the fiber-reinforced plastic layer corresponding to the sole of the sole is formed in an arc shape according to the shape of the sole of the sole, The insole is a sports shoes insole further comprises a fiber-reinforced plastic sidewall formed to a predetermined height along the outside of the human foot to the outer surface of the insole. delete delete The insole for sports shoes according to claim 1, wherein the side wall is formed from the heel portion of the human foot to the position of the columnar bone. The insole for sports shoes according to claim 1, further comprising a dissimilar material layer comprising foreign materials including at least one of cork, sponge, cloth, and kevlar between the fiber-reinforced plastic layers forming the sidewalls. According to claim 1, wherein the insole further comprises a fiber-reinforced plastic sidewall formed between the big toe and index finger to a predetermined height in the area between the big toe of the human foot and the index finger toe of the insole. Insoles for sports shoes. The insole for sports shoes according to claim 1, wherein the insole is formed such that an area in contact with the toe of the human foot of the insole surrounds the toe. The method of claim 1, wherein the insole is characterized in that further comprising a heterogeneous material layer comprising a foreign material including at least one of cork, sponge, cloth, kevlar between a plurality of laminated surfaces of the fiber-reinforced plastic constituting the insole. Insoles for sports shoes. The insole for sports shoes according to claim 1, wherein the number of the fiber-reinforced plastic layers is different for each part of the insole. The insole for sports shoes according to claim 1, wherein the fiber reinforced plastic is carbon fiber reinforced plastic.

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