JP2002282012A - Shoe insole and structure of shoe sole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the surface of a shoe insole, the rear surface of the shoe insole, and the structure of a shoe sole by which the three arch structures of the foot are prevented from sinking, the stepping section of the shoes becomes easy to bend, and the fatigue of the foot can be reduced. SOLUTION: On the rear surface of the insole of shoes, an arch sinking preventive plate is embedded. In this case, the arch sinking preventive plate corresponds with an upside-down triangular region for which the first os metatarsale capital grounding section, the fifth os metatarsale capital grounding section, and the calcaneum elevation grounding section are connected, and which elevates to the calcaneum sustentaculum tali apophysis. Then, on the surface of the insole, respective grounding sections are indented, the calcaneum sustentaculum tali apophysis section is elevated, and the thickness for the toe section is made thinner. Then, for a shoe external sole, a synthetic resin plate having an upside-down triangular shape is embedded at the corresponding location in the same manner as the shoe insole, and a lateral groove is provided at the foot front section. This shoe insole and this shoe sole structure are equipped with such characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a shoe insole and a structure of a grounding surface of an outsole used in combination with the insole.

[0002]

BACKGROUND OF THE INVENTION The primary function of a person's feet is to support the body, maintain an upright balance, and walk. The human foot has three arch structures (medial vertical arch: an arc formed from the first metatarsal head grounding part to the calcaneal prominence grounding part, lateral lateral arch: fifth metatarsal head grounding part to the calcaneus prominence grounding part. , An arch formed from the first metatarsal head ground contact portion to the fifth metatarsal head ground contact portion). The three arch structures of the feet function as shock absorbers when walking. By properly using the three arch structures, it is possible to support the body, maintain balance, and walk comfortably. Therefore, when there is an abnormality such as a drop in the arch structure, it not only impairs the ability to support walking and the body and maintain balance,
Excessive force is applied to the feet, knees, hip joints, etc., causing fatigue. Therefore, if fall of the arch structure of the foot can be prevented, fatigue of the foot is reduced. Examples of a state in which there is an abnormality such as a fall in the arch structure include a flat foot, an open leg, and the like. For flat feet, the vertical arch, especially the inner vertical arch, is depressed,
Feet weakened. This is a symptom that the arch of the foot disappears. The spring of the arch does not work when walking, and it is easy to get tired because it uses extra force. An open leg is a symptom in which the lateral arch of the foot should be damaged.

Generally, a shoe insole formed into a shape corresponding to the three-dimensional shape of the sole is known. This kind of shoe insole is
It is laid on the midsole of the shoe to enhance the stability of the foot inside the shoe and to cushion the impact on the foot. The insole that is shaped according to the shape of the sole improves the retention of the foot and improves cushioning and comfort, but the foot and the insole adhere and become stuffy, The point support function is reduced.

[0004] In addition, when a person is standing, three points of the calcaneus ridge contact portion, the first metatarsal head contact portion, and the fifth metatarsal contact portion of the foot bone are bony support points. is there. Inside the shoe, these three points move and disturb the stability, reducing the original function of the foot. For example, in the structure of a shoe that is too hard,
Three points shift when bent. Conversely, in the structure of a shoe having too soft a hardness, the shoe may be unstable from landing to bending.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, improve the holding ability of the foot, and easily exert the original three-point support function of the foot. An object of the present invention is to provide shoes, improve the slippage of the feet in the shoes, improve the comfort of the shoes, and provide shoes with less fatigue.
The condition of a good shoe is that the foot does not shift back and forth and right and left inside the shoe. A gap between the foot and the shoe causes hallux valgus, an octopus at the upper part of the toe, and beans. In addition, the structure of the shoe may be devised so that the impact on the foot is reduced, the comfort of the shoe is improved, and the fatigue of the foot is reduced. The impact on the foot during walking is less than when running, but the fatigue of the feet accumulates due to repetition of walking or the like for a long time.

[0006]

Means for Solving the Problems In order to solve the above problems, a shoe insole according to the present invention has a feature in the structure of the back surface. When put on, the calcaneus ridge of the foot bone, the first
Three points of the metatarsal head contact part and the fifth metatarsal head contact part are osseous support points. The arch fall prevention plates connecting the grounding portions support the force applied to the three points of each grounding portion, and support the weight in a well-balanced manner. The arch fall prevention plate has the same effect as a shank for preventing the arch structure of the foot from falling.

[0007] The triangular arch fall prevention plate connecting the three points of each grounding portion is most effective in absorbing shock, but on the contrary, the flexibility of the tread portion of the shoe deteriorates. A portion connecting the ground and the calcaneal ridge protruding ground portion is omitted to form an inverted L-shape. The arch structure connecting the ground contact of the first metatarsal head and the contact portion of the calcaneous ridge protrudes from the contact portion of the calcaneal footrest to prevent a fall.

In the insole of the present invention, an embedded part is provided on the back surface of the shoe insole. The board is set to have a higher hardness than the shoe insole body, and the buried portion, when the foot is placed, the first metatarsal head ground portion of the foot bone and the fifth metatarsal head ground portion of the foot bone And an inverted L-shaped region connecting the calcaneus ridge and the calcaneus ridge, and the calcaneus pedestal protrusion is provided so as to protrude in a convex shape.

[0009] The inverted L-shaped arch fall prevention plate is characterized by having a higher hardness than the shoe insole body. The higher the hardness of the arch drop prevention plate, the higher the effect of preventing the arch structure from dropping. However, if the hardness is too high, the wearing comfort becomes poor. Here, the hardness is measured according to JIS K625.
No. 3 is described as a standard, and is measured by a spring hardness tester specified in JIS K6253. There are Type A and Type D spring hardness testers. The difference between Type A and Type D is that when the hardness is 90 degrees or more as measured by Type A, it is measured by Type D, and when the hardness is less than 20 degrees as measured by Type D, J is measured by Type A.
It is described in ISK6253. Therefore, the hardness in type D is harder than the hardness in type A. The hardness of the inverted L-shaped arch fall prevention plate (measured by a spring hardness test (type D) specified in JIS K6253) is preferably 60 to 70 degrees (type D). If the hardness is 20 degrees or more (type D) as measured, the purpose of the effect of preventing the arch structure from dropping is achieved. As the hardness of the insole body (measured by a spring hardness test (type A) specified in JIS K6253), 35 to 45 degrees (type A) is preferable.

[0010] Further, although the above-mentioned shoe insole alone has sufficient ability to prevent the arch structure of the foot from dropping, the sole of the present invention is provided on the outer sole contact surface in the same manner as the above-mentioned shoe insole. By embedding an inverted L-shaped synthetic resin plate in the foot, the ability to prevent the arch structure of the foot from dropping is improved. Corresponding to embedding the inverted L-shaped arch fall prevention plate on the back surface of the shoe insole, an inverted L-shaped synthetic resin plate is embedded on the sole contact surface at the same position.

The shoe sole according to the present invention has a buried portion provided on the ground contact surface side of the outer sole of the shoe sole in which the middle sole is laminated on the outer sole of the shoe, and the embedded portion has an elastic synthetic resin plate. In the shoe sole where is embedded, the synthetic resin plate is set higher in hardness than the outer sole body of the shoe, and the embedded portion, when the foot is placed,
It is provided so as to correspond to an inverted L-shaped region connecting the first metatarsal head contact part, the fifth metatarsal head contact part, and the calcaneous ridge contact part of the foot bone. I do.

The higher the hardness of the inverted L-shaped synthetic resin plate, the greater the effect of preventing the arch structure of the foot from dropping, but on the contrary, the outer sole of the shoe becomes more slippery. Thus, the hardness of the inverted L-shaped synthetic resin plate is higher than the hardness of the shoe outer sole body (J
The spring type hardness test (type A) defined in ISK6253) is set higher by 4 to 8 degrees (type A). Hardness of synthetic resin plate with inverted L shape (JISK
63-73 degrees (measured by a spring hardness test (type A) specified in 6253) (type A)
Is preferred. The hardness of the shoe outer sole body (measured by a spring-type hardness test (type A) specified in JIS K6253) is preferably 57 to 67 degrees (type A).

[0013] For the purpose of a synergistic effect of preventing the arch structure of the foot from dropping, the shoe of the present invention has a shoe insole with a shoe insole provided inside the shoe and a midsole laminated on the outer sole of the shoe. In the back surface of the shoe insole and the grounding surface of the outer sole of the shoe, an embedded portion is provided, respectively, the embedded portion is embedded with a synthetic resin plate having elasticity, and the embedded portion is In both cases, when the foot is placed, it corresponds to an inverted L-shaped region connecting the first metatarsal head grounding portion, the fifth metatarsal head grounding portion, and the calcaneal ridge grounding portion of the foot bone. It is characterized by being provided in.

Also, the foot does not shift back and forth and right and left inside the shoe,
It is desirable that the tread portion of the shoe sole bend easily so that the toes can be easily walked without the toes touching the toe portion in the shoe. The ability to walk with no extra force reduces foot fatigue. It is characterized by the structure of the insole surface and the sole contact surface.

Further, the shoe according to the present invention has a shoe insole provided with an insole in the inside of the shoe, and a sole in which the insole is laminated on the outer sole of the shoe. A concave portion is provided at a position corresponding to the first metatarsal head contact portion, the fifth metatarsal head contact portion, and the calcaneous ridge contact portion, and a convex portion is provided at a position corresponding to the calcaneal footrest contact portion. And, in the shoe insole, a thin step is provided at a position from the metatarsophalangeal joint of each of the five toes to the toe head, and a forefoot portion of the outer sole contact surface of the shoe, It is characterized in that a laterally long transverse groove is provided to facilitate bending of the forefoot portion.

The toes are connected to the first metatarsal head contact portion and the fifth metatarsal head.
The concave portion corresponding to the metatarsal head contact portion and the heel fit into the concave portion corresponding to the calcaneous protrusion contact portion. The calcaneus plaque is supported so as to be lifted by a projection corresponding to the calcaneus pedestal ground contact portion. When walking, force acts in a direction to advance the toe to the toe side of the shoe, but since the position of the finger and the heel of the foot is fixed by the concave portion, the toe does not easily move to the toe side of the shoe. When the medial longitudinal arch attempts to fall, it supports the calcaneal foot projection, thereby preventing the medial arch from falling and preventing it from becoming hallux valgus or correcting hallux valgus.

[0017] When the calcaneal projection is lowered,
The foot arch cannot be properly supported, and the function of the foot cannot be sufficiently exhibited. The protruding portion of the calcaneal footrest supports the calcaneus footrest at a high level to prevent depression and play a sufficient role in the function of the foot.

A step having a depth of 1 to 2 mm, preferably 1.5 mm, and a shape along the base of the toe from the metatarsophalangeal joint (base of the toe) to the toe head of each of the five toes. Is provided on the surface of the shoe insole. Therefore, a sufficient space for the toes is secured in the toe portion in the shoe. It is unlikely that the toes hit the toes in the shoe.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of an arch fall prevention plate for embedding on the back of a shoe insole according to the present invention. FIG.
FIG. 2 is a plan view of the shoe insole according to the present invention as viewed from the back. FIG. 3 is a perspective view seen from the surface of the shoe insole according to the present invention. FIG. 4 is a sectional view taken along line AA of the shoe insole according to the present invention, and FIG.
It is -B sectional drawing. FIG. 6 is a plan view of the sole of the present invention as viewed from the back, and FIG. 7 is a side view of the sole of the present invention as viewed from the side.

The material of the inverted L-shaped arch fall prevention plate 1 is preferably a material having an appropriate rebound resilience.
For example, ethylene-vinyl acetate copolymer resin, polyvinyl chloride resin, polyurethane resin, polyamide resin and the like are suitable. As a material of the insole body 7, a material having an appropriate elasticity is preferable, and for example, EVA foamed resin, rubber latex foam, urethane foam, or the like is preferable.

As shown in FIG. 1, a 1.5 mm thick hardness (JIS
Spring hardness test specified in K6253 (Type D)
The arch fall prevention plate 1 made of nylon having a degree of 65 degrees (type D) is cut into an appropriate shape of an inverted L-shape, and the convex portion corresponding to the calcaneal foot projection 5 is 7 mm. It is molded by a mold so as to be formed so as to protrude.

As shown in FIGS. 2 to 5, an adhesive is applied to one surface of the inverted L-shaped arch fall prevention plate 1, embedded in a mold, and the insole body 7 having a cloth adhered to one surface is placed thereon. , Toe thickness 2.5mm, tread thickness 4.0mm,
A shoe insole 6 with a heel portion of 4.0 mm is molded by a mold, and the hardness of the insole body 7 (measured by a spring hardness test (type A) specified in JIS K6253) is 40 degrees (type A). . As shown in FIGS. 3 and 4, the step 8 is formed in a shape 1.5 mm deep from the metatarsophalangeal joint (base of the toe) to the head of each toe and along the base of the toe. It is provided on the surface of the insole 6.

As shown in FIGS. 3 and 5, the surface of the insole 6
A concave portion is provided corresponding to the metatarsal head contact portion 2, the fifth metatarsal head contact portion 3, and the calcaneous ridge contact portion 4, and a convex portion corresponding to the calcaneal footrest contact portion 5 is provided. . 1.0
The inverted L-shaped arch fall prevention plate 1 having a thickness of mm and the insole main body 7 are embedded in a predetermined position and bonded at the same time as molding.

From FIG. 6, the hardness of the shoe outer sole 11 is connected in an inverted L-shape from the first metatarsal head contact part 2 to the fifth metatarsal head contact part 3 to the calcaneus prominent contact part 4. (JISK6
A 1.0 mm thick synthetic resin plate 9 of 68 degrees (measured by a spring hardness test (type A) specified in 253) is embedded, and the hardness (spring hardness test (type A specified in JISK6253) is determined. An outer sole body 10 of 62 degrees (type A), as measured by), is formed.

6 and 7, the forefoot portion of the outer sole 11 of the shoe is
A laterally long transverse groove 1 for facilitating bending of the forefoot portion
2 are provided. One transverse groove 12 is sufficient, but if it is two, it becomes easier to bend.

The synthetic resin plate 9 and the outer sole body 10 are made of natural rubber (NR), polybutadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), ethylene-propylene copolymer rubber (EPR), Rubbers such as isoprene rubber (IR), nitrile rubber (NBR) and urethane foam (PU), and soft polyvinyl chloride (PV)
C) or one or a mixture of two or more selected from synthetic resins such as ethylene-vinyl acetate copolymer (EVA), but is not limited thereto. The synthetic resin plate 9 and the shoe outer sole body 10 are formed in different colors so that the functions can be clearly seen from the appearance.

As shown in FIG. 7, a hot compression molded EVA foam wedge having a hardness (measured by a spring hardness test (type A) specified in JIS K6253) of 54 degrees (type A) is provided on the outer sole 11 of the shoe. The body 13 is adhered to form the sole 14. EVA foam wedge 13
Hardness (measured by a spring hardness test (type A) specified in JIS K6253) is 49 to 5
9 degrees (type A) is preferred. The shoes according to the present invention may be men's shoes, women's shoes, children's shoes, slippers, sandals, tabi, or any other type of footwear.

[0028]

The insole according to the present invention is connected in an inverted L-shape from the first metatarsal head contact part to the fifth metatarsal head contact part to the calcaneus prominent contact part. An arch fall prevention plate, which protrudes and is connected to the distance projection grounding portion, is embedded in the back surface of the shoe insole. Further, the outsole of the present invention has an inverted L-shaped synthetic resin plate embedded at a position corresponding to the position where the arch fall prevention plate is embedded on the back surface of the insole, similarly to the above-mentioned insole.

The above-mentioned shoe in which the insole and the outsole of the present invention are combined provides a force acting on the first metatarsal head contact portion, the fifth metatarsal head contact portion, and the calcaneous ridge contact portion due to a synergistic effect. Can be easily supported at the original three points of the foot, and the arch structure of the three feet (outer vertical arch, horizontal arch, inner vertical arch) can be prevented from dropping. Thereby, fatigue of the foot can be reduced, and a stretched foot, a flat foot, and the like can be prevented.

In particular, the inverted L-shape of the arch fall prevention plate connected from the first metatarsal head ground contact portion to the fifth metatarsal head ground contact portion and to the calcaneus ridge contact portion is due to the arch structure depression ( It has the effect of preventing the outer vertical arch and the horizontal arch), and also has the effect of increasing the flexibility of the tread portion of the shoe. And
The depression of the inner vertical arch can be prevented by the protruding portion of the calcaneal foot rest contacting portion connected to the arch drop prevention plate in the middle.

In the insole of the present invention, the calcaneal ridge protruding portion, the first metatarsal head contact portion, and the fifth metatarsal head contact portion are provided with recesses on the surface side of the shoe inner, and The protruding portion protrudes from the ground contact portion. A thin step is provided on the surface side of the shoe inner from the metatarsophalangeal joint (base of the toe) to the toe head of each of the five toes.

The sole of the present invention is provided with a laterally long lateral groove on the outer sole contact surface side of the shoe to facilitate bending of the forefoot. The shoe in which the insole and the sole of the present invention are combined can prevent the foot from shifting in the front-rear and left-right directions inside the shoe due to the synergistic effect, and the shoe can be easily formed at a fixed portion of the tread portion. As a result of bending, stable walking becomes possible, and hallux valgus, octopus and upper leg of toes can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of an arch fall prevention plate for embedding in a shoe insole back surface according to the present invention.

FIG. 2 is a plan view of the shoe insole of the present invention (an inverted L-shaped arch fall prevention plate embedded in the back of the insole) as viewed from the back.

FIG. 3 is a perspective view of a shoe insole according to the present invention as viewed from the surface.

FIG. 4 is a sectional view taken along the line AA of the shoe insole according to the present invention.

FIG. 5 is a sectional view taken along line BB of the insole according to the present invention.

FIG. 6 is a plan view of the sole of the shoe of the present invention as viewed from the back.

FIG. 7 is a side view of the shoe sole of the present invention as viewed from the side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arch fall prevention board 2 First metatarsal head contact part 3 Fifth metatarsal head contact part 4 Calcaneous ridge prominent contact part 5 Calcaneus foot support contact part 6 Shoe insole 7 Insole main body 8 Step 9 Synthetic resin Board (for outer sole of shoe) 10 Outer sole body of sole 11 Outer sole of sole (outsole) 12 Side groove 13 EVA foam wedge body (mid sole) 14 Sole of sole

Claims (4)

[Claims] 1. A shoe insole in which an embedded part is provided on the back surface of the shoe insole, and the embedded part has an elastic arch fall prevention plate embedded therein. Hardness is set higher than the insole body,
When the foot is placed, the buried portion is located in an inverted L-shaped region connecting the first metatarsal head contact portion of the foot bone, the fifth metatarsal head contact portion, and the calcaneous protrusion contact portion. A shoe insole, which is provided so as to correspond to the calcaneus and the ground contact portion of the calcaneus is protruded. 2. A shoe in which a middle sole is laminated on the outer sole of the shoe, a buried portion is provided on the ground contact side of the outer sole of the shoe, and a synthetic resin plate having elasticity is buried in the buried portion. In the sole, the hardness of the synthetic resin plate is set higher than that of the outer sole body of the shoe, and the buried portion is, when the foot is placed, the first metatarsal head grounding portion of the foot bone, A shoe sole provided so as to correspond to an inverted L-shaped region connecting a ground contact portion of a metatarsal head and a calcaneal protrusion contact portion. 3. A shoe having a shoe sole with a shoe insole provided inside the shoe and a midsole stacked on an outer sole of the shoe, wherein a back surface of the insole and a grounding surface of the outer sole of the shoe are provided: A buried portion is provided, and a synthetic resin plate having elasticity is buried in each of the buried portions, and both of the buried portions are in contact with the first metatarsal head of the foot bone when the foot is placed. Department and
Inverted L connecting the fifth metatarsal head contact part and the calcaneous ridge contact part
A shoe provided so as to correspond to a character-shaped region. 4. A shoe having a shoe insole provided inside the shoe and having a midsole laminated on the outer sole of the shoe, wherein the surface of the insole has a first metatarsal head grounding portion. And a concave portion is provided at a position corresponding to the fifth metatarsal head contact portion and the calcaneal ridge contact portion, and a convex portion is provided at a position corresponding to the calcaneal footrest contact portion. A thin step is provided at a position from the metatarsophalangeal joint to the toe head of each of the five toes, and the forefoot portion of the outer sole contact surface of the shoe facilitates bending of the forefoot portion. 4. A shoe according to claim 3, wherein a laterally long transverse groove is provided for this purpose.