JP4875860B2 - Insoles, shoes, and socks - Google Patents

Description

  The present invention relates to an insole for a shoe that can improve a wearer's operating performance, a shoe including the shoe, and a sock.

In competitive sports and the like, in order to improve the wearer's performance, it is important that the force of the foot is effectively transmitted to the ground through the shoes. As one of the elements, the suppression of the slip generated between the sole and the insole has been attracting attention.
For example, FIG. 1 of Patent Document 1 discloses an insole that is provided with anti-slip irregularities and rubber on the front sole portion. Further, in Patent Document 2, a pad layer for increasing frictional resistance is provided at a position where the toe and the other four toes step on or a position where the toe and the hill between the toe and the arch step on. An insole is disclosed. Furthermore, Patent Document 3 discloses an insole in which a large number of anti-slip small protrusions are formed to support the wearer's foot, but the small protrusions of the portion where the foot pressure acts strongly are not provided. Yes.

  The insole described in Patent Document 1 describes that the movement and force of the foot in the front part of the sole can be transmitted to the shoe in synergy with the sock having the anti-slip means provided in the front part of the sole. ing. Moreover, since the insole of patent document 2 can prevent a foot | slid from slipping in the position etc. where a toe and other 4 toes step on, etc., the power of a human toe and other 4 toes, or It is described that the power of the hill between the big toe and the arch is sufficiently transmitted to the shoe, and various operations can be performed quickly. Further, the insole of Patent Document 3 can suppress the sliding in the front-rear direction or the lateral direction by a large number of anti-slip small protrusions, but since the small protrusions are not provided in the portion where the foot pressure acts strongly, slipping is prevented. It is disclosed that pain in the soles can be reduced while suppressing.

The insole described in each of the above patent documents is a part where the foot load is relatively large by applying a non-slip treatment to the part where the pressing force of the sole is relatively large, that is, the part where the vertical load is relatively large. It is based on the idea that the insole can be integrated with the saddle, which can improve the operating performance. In addition, in order to achieve a different purpose of reducing the pain of the sole, the insole of Patent Document 3 discloses a configuration in which a small protrusion is not provided in a portion where a large pressing force of the foot is applied. In order to suppress the slip in the lateral direction, the basic idea that a large number of anti-slip protrusions should be provided in the portion where the foot pressing force is greatly applied is the same.
Indeed, it seems that if the insole and the sole are prevented from slipping in the part where the vertical load is greatly applied, the force of the foot is sufficiently transmitted to the shoe and the operation performance can be improved.
However, according to the studies by the present inventors, it has been found that an insole that has been subjected to a non-slip treatment on a portion to which a large vertical load is applied cannot sufficiently improve the wearer's operating performance.

Japanese Utility Model Publication No. 61-160706 Registered Utility Model No. 30672231 Japanese Utility Model Publication No.59-66409

  Then, this invention makes it a subject to provide the insole which can improve a wearer's operation | movement performance more, shoes provided with this, and socks.

As shown below, the present inventors have 1) an insole that has not been subjected to anti-slip treatment, 2) an insole that has been subjected to anti-slip treatment in a region where a large vertical load is applied, and 3) a large amount of vertical load is not applied. An insole with anti-slip treatment applied to the region, and 4) an insole with anti-slip treatment applied to the entire region were prepared, and a test was performed to confirm their motion performance.
1) Insole that has not been subjected to anti-slip treatment: The coefficient of dynamic friction (measurement method is as described in another item; the same shall apply hereinafter) is 0 on the surface of an insole body made of urethane foam with a thickness of 3 mm that has been cast in a foot shape. Attached 13 cover sheets (product name: BIG BK, made by Inui).
2) Insole that has been subjected to anti-slip treatment in a region where a large vertical load is applied: Of the cover sheet surface of the above 1) insole (the cover sheet adhered to the surface of the foam insole body), The coefficient of dynamic friction is 1.185 over the entire region 4 shown in FIG. 1 corresponding to the head of the metatarsal head of the heel, region 5 corresponding to the head of the second to fifth heel metatarsal, and region 8 corresponding to the heel. Non-slip sheet (made by Sumitomo 3M Co., Ltd., trade name: Greptile [registered trademark] ).
3) Insole that has been subjected to anti-slip treatment in an area where a vertical load is not greatly applied: Of the cover sheet surface of the insole described in 1) above, the area 3 corresponding to the proximal phalanx and the inside of the arch shown in FIG. A non-slip sheet (same as above) having a dynamic friction coefficient of 1.185 is attached to the entire corresponding region 6 and region 7 corresponding to the outside of the arch portion.

The above 1)-3) insole is fitted as a commercially available insole for sports shoes, and the randomly selected 6 subjects perform repeated lateral jumps for 10 seconds, and the floor contact time when changing direction is determined. It was measured. For measurement, install a floor reaction force meter at the right foot direction change position of repeated lateral jump, and from the floor reaction force data captured by it, every time the direction is changed by repeated lateral jump movement, Each contact was measured for a second, and the time was averaged to determine the contact time per turn of each subject.
Then, as a result of obtaining the average of the contact time per turn of the six subjects, the contact time of the above insole is 0.208 seconds, 2) the insole is 0.207 seconds, and 3) The insole was 0.201 seconds, and when the insole of 3) was used, the ground contact time was significantly shortened.

From the above results, 2) It can be said that the insole that has been subjected to the anti-slip treatment in the area where the vertical load is greatly applied is 1) the operation performance is slightly better than the insole that is not subjected to the anti-slip treatment at all. It was found that the ground contact time is longer and the wearer's performance is clearly inferior to the insole that has been slip-treated in areas where vertical loads are not significantly applied.
Based on this result, the present inventors have confirmed that the force acting in the horizontal direction of the sole is important when exercising in the front-rear direction and the lateral direction. If the horizontal force is made uniform in each part of the sole as much as possible, the horizontal force in each part of the sole can be exerted in a well-balanced manner. This is thought to contribute to the improvement of performance. This is because the insole of 3) is superior in operating performance, but the insole that has been subjected to anti-slip treatment in a region where a large vertical load is applied, such as the insole of 2), is the horizontal direction at that part. This is in agreement with the result that the force to the force becomes excessively large, the balance is lost, and the operation performance is not improved so much.
The horizontal force (frictional force) is expressed as vertical load x dynamic friction coefficient, and the dynamic friction coefficient of the region corresponding to the portion where the vertical load of the insole is large is reduced, and the region corresponding to the portion where the vertical load is small is determined. By increasing the dynamic friction coefficient, the force acting in the horizontal direction of the sole can be made uniform during exercise.

  The present invention also relates to an insole of a shoe in contact with a sole, a region corresponding to the inside of the arch portion of the sole, a region corresponding to the outside of the arch portion of the sole, and a toe metatarsal head of the sole The dynamic friction coefficient of the insole surface in the region corresponding to is provided with the insole of the shoe formed in the following relationship, respectively. Relationship between dynamic friction coefficients of each region: a region corresponding to the inside of the arch portion of the sole> a region corresponding to the outside of the arch portion of the sole> a region corresponding to the metatarsal head of the sole of the sole of the sole.

The pressing force applied to the insole surface in each area of the sole may vary depending on the content of the competition or action, but the area corresponding to the inside of the arch part of the insole surface, the sole The pressing force applied to the area corresponding to the outside of the arch and the area corresponding to the metatarsal head of the sole of the sole of the foot is the structure of the foot, regardless of the content of the competition or movement, and the midfoot of the sole of the sole of the foot It is considered that the region corresponding to the bone head is the largest, followed by the region corresponding to the outside of the arch portion of the sole, and then the region corresponding to the inside of the arch portion of the sole.
Accordingly, the dynamic friction coefficient of the insole surface at least in this region corresponds to the region corresponding to the inside of the arch portion of the sole> the region corresponding to the outside of the arch portion of the sole> the metatarsal head of the sole of the sole of the sole. By forming in the size of the region, the horizontal force (frictional force) in these regions can be made more uniform.

  Furthermore, in a preferred aspect of the present invention, the region corresponding to the inside of the arch portion is formed with a dynamic friction coefficient of 0.5 to 2, and the region corresponding to the outside of the arch portion is formed with a dynamic friction coefficient of 0.3 to 1.25. In addition, the insole of the shoe is provided in which the region corresponding to the head of the metatarsal metatarsal is formed with a dynamic friction coefficient of 0.1 to 0.5.

The second means of the present invention provides a shoe in which the insole is provided on the sole contact surface.
Further, the third means of the present invention includes a region corresponding to the inside of the arch part of the sole, a region corresponding to the outside of the arch part of the sole, and a region corresponding to the metatarsal head of the sole of the sole of the sole. There is provided a sock in which the dynamic friction coefficient of the outer surface of the sock is formed in the following relationship . Relationship between dynamic friction coefficients of each region: a region corresponding to the inside of the arch portion of the sole> a region corresponding to the outside of the arch portion of the sole> a region corresponding to the metatarsal head of the sole of the sole of the sole.
In a preferred embodiment, a region corresponding to the inside of the arch portion is formed with a dynamic friction coefficient of 0.5 to 2, a region corresponding to the outside of the arch portion is formed with a dynamic friction coefficient of 0.3 to 1.25, and the mother The sock is provided in which a region corresponding to the heel metatarsal head is formed with a dynamic friction coefficient of 0.1 to 0.5.

  According to the insole, shoes and socks according to the present invention, during exercise, the force in the horizontal direction in each part of the sole of the wearer can be exerted in a well-balanced manner, and the operation performance of the wearer is improved. It can be improved further.

Hereinafter, the present invention will be specifically described with reference to the drawings.
In FIG. 1, reference numeral 10 denotes an insole that has been subjected to a non-slip treatment on a predetermined region of the surface of the insole main body (a surface that contacts the sole) that has been molded with a predetermined foot shape.
The insole 10 has a plurality of regions with different dynamic friction coefficients formed on the insole surface. The dynamic friction coefficient in the region where the pressing force of the sole is large is small, and the region where the pressing force of the sole is small is formed. It has an insole surface formed with a large dynamic friction coefficient. The insole 10 is formed with a small dynamic friction coefficient in a region where a large pressing force is applied to the sole, and a large dynamic friction coefficient is formed in a region where the pressing force on the sole is small. The horizontal force (frictional force) in the region can be made more uniform. By using the insole 10, the wearer's operating performance can be further improved.

A conventionally well-known insole body can be used. As the insole body, for example, a foamed resin molded article excellent in flexibility such as polyurethane and EVA is preferable, but it may be non-foamed, and other than synthetic resin, for example, leather may be used. Further, the insole body may be composed of a multilayer laminate. Examples of the insole body having such a laminated structure include those described in Japanese Patent Application Laid-Open No. 11-151102 filed by the present applicant.
In addition, the insole body may be formed in a flat surface shape, similar to a conventionally known insole, and so that the insole surface is substantially in contact with the sole along the unevenness of the sole, The surface shape of the insole body may be formed in an uneven shape. For example, the insole main body etc. in which the insole surface part corresponding to the inside of an arch part (arch part) is formed in the raised shape are illustrated.
Further, the surface of the insole body may be covered with a cloth or the like, or the material of the insole body may be exposed as it is (for example, a skin layer of foamed resin).

Next, the structure of the surface of the insole which is a characteristic part of the present invention will be described.
As described above, the present invention has been made based on the idea of making the force in the horizontal direction uniform in each part of the sole as much as possible in order to obtain the effect of improving the wearer's operation performance. . To equalize the horizontal force as much as possible, horizontal force (friction force) = vertical load x dynamic friction coefficient. This can be achieved by adjusting the dynamic friction coefficient in each region of the insole surface in accordance with the vertical load, in which the dynamic friction coefficient is increased in the region where the sole pressure is reduced and the dynamic friction coefficient is increased. Therefore, according to the pressure distribution of the sole applied to the insole surface, the insole surface is divided into very fine regions, and the dynamic friction in each region is such that the horizontal force is substantially constant in each region. It can be said that it is ideal to vary the coefficients in stages.
However, apart from the one-manufactured one, it is unrealistic as an industrial product to be divided into many areas too much, and the pressure distribution on the sole of the foot varies depending on the content of the competition and movement (type of movement). Change.

Considering these points, in the present invention, the insole surface corresponding to each part of the sole is divided into eight regions as shown in FIG. 1, and the relationship of the magnitude of the vertical load regardless of the competition content. The area where the change is not selected.
Here, the two-dot chain line in FIG. 1 is an imaginary line that divides the insole surface into eight regions, and 1 is a region corresponding to the metacarpal segment of the sole of the sole (hereinafter referred to as “region 1”). 2 is a region corresponding to the second to fifth distal phalanxes of the sole (“region 2”), and 3 is a region corresponding to the proximal phalanx of the sole (“region 3”). ) 4 is a region corresponding to the metatarsal head of the heel of the sole of the foot (same “region 4”), and 5 is a region corresponding to the head of the second to fifth heel metatarsal of the sole (“region 5”). )), 6 is a region corresponding to the inside of the arch part of the sole (same “region 6”), 7 is a region corresponding to the outside of the arch part of the sole (same “region 7”), and 8 is the sole Regions corresponding to the buttocks ("region 8") are shown.

As described above, even when the insole surface is divided into eight regions, the pressing force (vertical load) on the soles applied to the regions 1 to 8 may differ depending on the competition and the operation content. For example, in the case of an operation such as a start dash of 100 m, the vertical load applied to the region 4 is larger than that in the region 8, while in the case of an operation like a back step such as badminton, the region 8 is Greater than 4.
In this regard, when examined from the data of the pressure distribution of the sole in various motions and the structural features of the foot, the relationship between the vertical load applied to the region 6, the region 7 and the region 4 is the motion. Regardless of the contents, the area 4 is considered to be large, followed by the area 7 and then the area 6.
Therefore, the dynamic friction coefficient of the insole surface in at least these three regions 4, 6, and 7 is set so that the region 6 is large, then the region 7 and then the region 4 in that order. The direction force can be made as uniform as possible.
That is, the dynamic friction coefficient in the regions 4, 6 and 7 of the insole surface is defined as “region 6 corresponding to the inside of the arch portion> region 7 corresponding to the outside of the arch portion> region 4 corresponding to the head of the metatarsal metatarsal”. It is formed so as to have a magnitude relationship of

The relationship between the three areas 4, 6, and 7 is general regardless of the content of the game. In the present invention, the dynamic friction coefficient in the areas 4, 6, and 7 of the insole surface is expressed as area 6> area. 7> If it is formed in the relationship of the region 4, the dynamic friction coefficients in the other regions 1, 2, 3, 5, and 8 can be designed as appropriate.
For example, in the case of an operation such as a start dash of 100M running, the pressing force (vertical load) of the sole applied to the regions 4, 6, 7 and 8 among the regions 1 to 8 is region 4> region 8> region. 7> It has been found that region 6 is obtained. Therefore, in this case, it is preferable that the dynamic friction coefficients in the regions 4 to 7 on the insole surface are formed in the region 6> region 7> region 8> region 4.
Further, for example, in the case of an operation corresponding to a back step such as badminton, the pressing force (vertical load) of the sole applied to the regions 4, 6, 7 and 8 among the regions 1 to 8 is region 8> It is known that region 4> region 7> region 6. Therefore, in this case, it is preferable that the dynamic friction coefficients in the regions 4 to 7 on the insole surface are formed as region 6> region 7> region 4> region 8.
Further, the relationship of the pressing force (vertical load) of the sole including all the regions 1 to 8 is, for example, in the case of repeated lateral jump, region 4> region 8> region 1> region 5> region 2> region 7 Since> region 3> region 6, the dynamic friction coefficient in regions 1 to 8 on the insole surface is formed in region 6> region 3> region 7> region 2> region 5> region 1> region 8> region 4. do it.

  As described above, the dynamic friction coefficients in the regions 4, 6, and 7 are the region 6> the region 7> the region 4, but as specific numerical values of the dynamic friction coefficients in the regions 4, 6, and 7, It is appropriately set according to the pressure of the sole applied to the region. Of the regions 4, 6, and 7, the region 4 is the region where the most pressing force of the sole is applied. For example, during repeated lateral movement, the pressing force (vertical load) of the sole in the region 4 is About 246N, the pressing force (vertical load) of the sole in the region 7 is about 18.6N, and the pressing force (vertical load) of the sole in the region 6 is about 9.8N. Therefore, the dynamic friction coefficient in the region 4 is about 0.1 to 0.5, preferably about 0.3, and the dynamic friction coefficient in the region 7 is about 0.3 to 1.25, preferably about 0.1. The dynamic friction coefficient in the region 6 is about 0.5 to about 2.0, preferably about 1.2. Moreover, it is preferable that the dynamic friction coefficients in the regions 4, 6 and 7 are formed so as to have a difference of 0.2 or more.

Here, the dynamic friction coefficient of the present invention refers to a numerical value measured as follows.
For the measurement of the dynamic friction coefficient, a fixed base on which a sample to be measured is attached and a movable weight to which a mating material is attached are prepared. For each of the above areas on the insole surface to be measured, prepare a sample with a sufficient size (size that sufficiently exceeds `` the width of the mating material x moving distance ''), and fix it on the top of a smooth fixed base To do. As a counterpart material, an aluminum plate having a smooth bottom surface (width × length = 30 × 30 mm) is attached to the movable weight. A weight of 1.0 kg is placed on the movable weight and moved in a direction parallel to the upper surface of the fixed base at a speed of 300 mm / min. A dynamic friction coefficient is calculated | required from the frictional force during moving 20 mm of movable weights. Coefficient of dynamic friction = friction force while moving the movable weight by 20 mm / force acting vertically on the contact surface between the sample and the mating material (vertical load).

Next, as a means for making each region on the insole surface have a dynamic friction coefficient as described above, a conventionally known anti-slip treatment is applied to the insole surface.
For example, a non-slip sheet (for example, Grep tile [registered trademark] manufactured by Sumitomo 3M Co., Ltd.) is pasted on the entire area 6 (area where the dynamic friction coefficient is set to be large), and is applied to the entire area 7 (area where the dynamic friction coefficient is set small). Then, an anti-slip sheet having a smaller dynamic friction coefficient than that of the region 6 is pasted, and then an anti-slip sheet having a smaller dynamic friction coefficient than that of the region 7 or an anti-slip sheet is pasted over the entire region 4 (region where the dynamic friction coefficient is set to be smaller). Without exposing the surface of the insole body (in this case, the surface of the insole body is within the range of the above-mentioned dynamic friction coefficient), the dynamic friction coefficient is as follows: region 6> region 7> region 4 You can get an insole that satisfies the relationship.
In addition, instead of sticking the anti-slip sheet, for example, an anti-slip material (for example, an anti-slip material such as urethane resin or synthetic rubber, a coating liquid that generates fine irregularities after drying) is applied to the entire region 6. Alternatively, an anti-slip material having a smaller dynamic friction coefficient than that of the region 7 may be applied to the entire region 7, and an anti-slip material having a smaller dynamic friction coefficient than that of the region 7 may be applied to the entire region 4.
The anti-slip sheet or anti-slip material as described above has substantially no unevenness on its surface or has fine unevenness, and the anti-slip surface is applied from the sole of the wearer. This is preferable because the wearer does not feel pain in the sole because it is substantially flat and cannot recognize the presence or absence of irregularities.
Further, for example, the anti-slip treatment by forming the unevenness may be performed such that the non-slip small protrusions are densely formed in the entire area 6 and the anti-slip small protrusions are formed in the entire area 7 more coarsely than the area 6. it can. In addition, when using the anti-slip | skid small processus | protrusion as an anti-slip | slipping process, it is preferable to form the anti-slip | skid processus | protrusion so that a wearer does not feel pain on a sole. Such an anti-slip small protrusion is preferably formed so that the difference in contact pressure between the upper end of the small protrusion and a portion about 5 mm away from the outer edge of the small protrusion is 5 kg / cm ² or less.
However, the contact pressure difference is a numerical value measured by a foot pressure distribution measurement system, F-scan, manufactured by Nitta.

Further, as the anti-slip treatment, in addition to performing different anti-slip treatments on the entire areas as described above, the anti-slip treatment can be partially applied in each region.
For example, as shown in FIG. 2 (a), an anti-slip treatment (such as the above-described application of an anti-slip sheet, application of an anti-slip material, formation of small protrusions, etc.) Examples of the application of the anti-slip treatment are a linear shape, a net shape as shown in FIG. 5B, and a dot shape as shown in FIG. When the anti-slip treatment is partially performed, the region where the dynamic friction coefficient is set large is subjected to the anti-slip treatment so that the ratio of the area subjected to the anti-slip treatment is high with respect to the entire area, and the friction is applied. The region where the coefficient is set small may be roughly subjected to the anti-slip process so that the ratio of the area where the anti-slip process is performed to the entire area of the region is small.
For example, as shown in FIG. 3, the region 6 is subjected to an anti-slip treatment overly densely (for example, the width of the anti-slip treatment is increased), the region 7 is subjected to the anti-slip treatment more coarsely than the region 6, and the region 4 is subjected to By applying the anti-slip treatment rougher than the region 7 or using the non-slip treatment, it is possible to obtain an insole whose dynamic friction coefficient satisfies the relationship of region 6> region 7> region 4.
Thus, each area | region from which a dynamic friction coefficient differs can be formed, for example using the same anti-slip material by giving a slip prevention process partially and adjusting the ratio according to each area | region. Therefore, for example, by printing (including printing and coating) an anti-slip material in a predetermined plane shape, it is possible to form each region having a different dynamic friction coefficient at a time. Can be manufactured. Further, if the anti-slip treatment is performed by partially applying an anti-slip material (mixing a colorant such as a pigment if necessary), the design of the insole surface can also be used.

The insole of the present invention can be used as a shoe by being provided on the sole contact surface of the shoe. The insole may be simply fitted into the shoe, or may be fixed with an adhesive. Further, the same insole treatment as the surface of the insole may be performed directly on the sole bonding surface of the shoe, and the insole may be integrally formed on the sole contact surface of the shoe of the present invention.
In addition, even if the anti-slip treatment applied to the insole surface of the present invention is similarly applied to the outer surface of the sock (the lower surface, ie, the insole contact surface), the wearer Is expected to improve the operating performance.
In the sock, a plurality of regions having different dynamic friction coefficients are formed on the outer surface of the sock, and the dynamic friction coefficient in the region where the pressing force of the sole is large is reduced, and the dynamic friction coefficient in the region where the pressing force of the sole is small is set. It has a region formed large. Preferably, the dynamic friction coefficient of the outer surface of the socks in the region 6 corresponding to the inside of the arch portion of the sole, the region 7 corresponding to the outside of the arch portion of the sole, and the region 4 corresponding to the metatarsal head of the sole of the sole of the foot Are socks formed in the region 6 corresponding to the inside of the arch portion of the sole, the region 7 corresponding to the outside of the arch portion of the sole, and the region 4 corresponding to the metatarsal head of the heel of the sole.
When wearing such socks, shoes with different dynamic friction coefficients are not formed as in the above insole, and if a shoe having an insole with a substantially uniform dynamic friction coefficient is worn, the horizontal force is as uniform as possible. Can be demonstrated.
Further, by combining the insole partially subjected to the anti-slip treatment and the socks partially subjected to the anti-slip treatment, the dynamic friction coefficient between the insole socks becomes region 6> region 7> region 4 by the combined function of both. Even in the design, the horizontal force can be as uniform as possible.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.

(Insole for testing)
Coefficient of dynamic friction (measurement method is as follows) on the surface of the insole body made of foamed urethane with a thickness of 4 mm cast into a foot shape (however, the inner part of the arch part is curved upward so as to contact the arch of the sole) Street) 0.13 cover sheet (product name: BIG BK, made by Inui).

(Measurement of dynamic friction coefficient)
For the measurement of the dynamic friction coefficient, a fixed base on which a sample to be measured is attached and a movable weight to which a mating material is attached are prepared. For each region of the insole surface that is the measurement target, a sample cut to 20 mm × 30 mm is prepared and fixed to the upper surface of a smooth fixing base. As a counterpart material, an aluminum plate having a smooth bottom surface (width × length = 30 × 30 mm) is attached to the movable weight. A weight of 1.0 kg is placed on the movable weight and moved in a direction parallel to the upper surface of the fixed base at a speed of 300 mm / min. A dynamic friction coefficient is calculated | required from the frictional force during moving 20 mm of movable weights. Coefficient of dynamic friction = friction force while moving the movable weight by 20 mm / force acting vertically on the contact surface between the sample and the mating material (vertical load).
As shown in FIG. 4, the insole of the embodiment has a portion where the anti-slip treatment is densely applied and a portion where the anti-slip treatment is not applied in the region 7, and the dynamic friction coefficient is large depending on the cut portion of the sample. For the sake of convenience, the following method was used for calculation. In area 7, cut out a sample (20 mm x 30 mm) so that it includes a portion where the anti-slip treatment is dense and a portion where the anti-slip treatment is not present, and move the movable weight to the portion where the anti-slip treatment is dense. Then, the dynamic friction coefficient (μ1) of the sample in the dense part of the anti-slip treatment is measured. Next, the dynamic friction coefficient (μ2) is measured in the same manner as described above for the portion of the sample that does not have the anti-slip treatment. From the ratio (A = a1 + a2) of the area (a1) where the sample was subjected to the anti-slip treatment and the area (a2) where the anti-slip treatment was not performed, the average dynamic friction coefficient was determined according to the following formula.
Formula: Dynamic friction coefficient of region 7 = (a1 / A) × μ1 + (a2 / A) × μ2

(Example)
On the surface of the cover sheet for the test insole, polyurethane as a non-slip material was applied in the same linear shape as the design shape shown in FIG. In FIG. 4, the portion where polyurethane is applied is indicated by light ink painting.
The above test method is used to determine the dynamic friction coefficient of the region 6 corresponding to the inside of the arch portion of the sole of the insole, the region 7 corresponding to the outside of the arch of the sole, and the region 4 corresponding to the metatarsal head of the sole of the sole. Measured with
As a result, the dynamic friction coefficient of the region 6 corresponding to the inside of the arch portion of the sole is about 0.65, the dynamic friction coefficient of the region 7 corresponding to the outside of the arch portion of the sole is about 0.3, and the toe of the sole The coefficient of dynamic friction in region 4 corresponding to the metatarsal head was about 0.13.

(Comparative example)
The above test insole was used as it was (without anti-slip treatment).

(Operating performance test)
When the insole of the above examples and comparative examples is fitted as an insole of a commercially available sports shoe (size 27 cm), the three testers arbitrarily extracted perform repeated lateral jumps for 10 seconds to change the direction. The floor contact time was measured. For measurement, install a floor reaction force meter at the right foot direction change position of repeated lateral jump, and from the floor reaction force data captured by it, every time the direction is changed by repeated lateral jump movement, Each contact was measured for a second, and the time was averaged to determine the contact time per turn of each subject.
And as a result of calculating the average of the contact time per direction change of three subjects, in the shoes having the insole of the example, in 0.205 seconds, in the shoes having the insole of the comparative example, It was 0.220 seconds, and the ground contact time tended to be shorter when the insole of the example was used.

The top view which looked at the insole of this invention from the surface side. The two-dot chain line indicates a virtual line for partitioning each region. The same applies hereinafter. The reference top view which shows each example aspect at the time of performing an anti-slip process partially on the insole surface. However, the portion subjected to the anti-slip treatment is indicated by light ink painting. The same applies hereinafter. The top view which shows the aspect which performed the anti-slip process partially to the area | regions 4, 6, and 7 of the insole surface. The top view which looked at the insole produced in the Example from the surface side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Area | region corresponding to the phalanx phalange part of the sole of a foot 2 ... Area | region corresponding to the 2nd-5th phalanx phalange part of a sole 3 ... Area | region corresponding to the proximal phalanx part of a sole 4 ... Foot Area corresponding to the head of the metatarsal bone at the back of the sole, 5... Area corresponding to the head of the 2nd to 5 th metatarsal bone at the sole, 6. Area corresponding to the inside of the arch part of the sole, 7. Area corresponding to the outside of the arch, 8 ... Area corresponding to the heel part of the sole, 10 ... Insole

Claims (5)

The dynamic friction coefficient of the insole surface in the area corresponding to the inside of the arch part of the sole, the area corresponding to the outside of the arch part of the sole, and the area corresponding to the metatarsal head of the sole of the sole is respectively shown below. Insole for shoes characterized by being formed in a relationship.
Relationship between dynamic friction coefficients of each region: a region corresponding to the inside of the arch portion of the sole> a region corresponding to the outside of the arch portion of the sole> a region corresponding to the metatarsal head of the sole of the sole of the sole.   A region corresponding to the inner side of the arch is formed with a dynamic friction coefficient of 0.5 to 2, and a region corresponding to the outer side of the arch is formed with a dynamic friction coefficient of 0.3 to 1.25. The insole of the shoe according to claim 1, wherein the region corresponding to the portion is formed with a dynamic friction coefficient of 0.1 to 0.5.   The insole according to claim 1 or 2 is provided on a sole contact surface. The dynamic friction coefficient of the outer surface of the sock in the area corresponding to the inside of the arch part of the sole, the area corresponding to the outside of the arch part of the sole, and the area corresponding to the metatarsal head of the sole of the sole is as follows. Socks characterized by being formed into.
Relationship between dynamic friction coefficients of each region: a region corresponding to the inside of the arch portion of the sole> a region corresponding to the outside of the arch portion of the sole> a region corresponding to the metatarsal head of the sole of the sole of the sole. A region corresponding to the inner side of the arch is formed with a dynamic friction coefficient of 0.5 to 2, and a region corresponding to the outer side of the arch is formed with a dynamic friction coefficient of 0.3 to 1.25. The sock according to claim 4, wherein a region corresponding to the portion is formed with a dynamic friction coefficient of 0.1 to 0.5.

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