JP2756903B2 - Flexible insoles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a shoe insole.

[0002]

2. Description of the Related Art Conventionally, various types of insoles have been known. One example is the actual opening 57-146
507 "Skin elimination of sticky feet" (conventional example). The conventional example is related to "a non-stick footwear in which an elastic body is attached to a portion corresponding to an arch of the footwear."

[0003]

Recently, plastic flooring materials and asphalt roads are frequently used as walking places, but plastic flooring materials are polished with wax.
There is a problem that it is difficult to walk on the floor and the floor is hard, so that the tire is easily fatigued.

[0004] By the way, the human foot is composed of 26 main bones, seed bones and excess bones, and can be divided into three parts: bones of the phalanges, metatarsals and tarsal bones. Also, when walking or exercising, that is, when the human shifts weight, the calcaneus, cuboid, fifth metatarsal located outside, the calcaneus, talus, scaphoid, cuneiform bone located inside, the first It is said that the arcuate shape consisting of the metatarsus and the metatarsal head of the forefoot acts to support weight.

[0005] Of these, it is particularly important that the first metatarsal head (the base of the thumb) bears weight in the standing position and during exercise so that the burden increases. In addition, the so-called hallux valgus, in which the thumb of the foot is bent to the little finger side, is the above-mentioned 3 which is found in a normal foot.
This is a state in which the two bow-shaped shapes are crushed to easily become flat feet and open feet. Since the bow shape has the function of a spring that absorbs the walking cushion, when this is gone, when wearing shoes,
A heavy load is placed on the base of the thumb, and further deforming the thumb into a dogleg shape causes foot pain and fatigue.

[0006] In addition to the conventional example, the conventional shoe insole has these problems.

[0007]

Means for Solving the Problems The present invention provides

A base material, a convex portion provided near the position of the second metatarsal head on the base material, and having a uniform surface hardness to reduce a load applied to the base of the thumb of the foot during walking; Flexible shoe insole characterized by comprising a skin material laminated on the part,

And

[0010] A base material having a hardness of 80 degrees or more, a convex portion having a hardness of 20 to 60 degrees provided near the position of the second metatarsal head on the substrate, and laminated on the substrate and / or the convex portion. A flexible shoe insole characterized by comprising a skin material,

And

A base made of a flexible polyurethane foam having a hardness of 80 degrees or more; a convex portion made of a soft polyurethane foam having a hardness of 20 to 60 degrees provided near the position of the second metatarsal head on the base; And / or a skin material laminated on the protruding portion, and a flexible insole characterized by comprising:

The present invention has been devised for the purpose of relieving the burden on the base of the thumb of the foot while walking, and provides a flexible shoe insole for eliminating solid feet.

[0014]

When a shoe with an insole is used, a convex portion comes into contact with and supports the second metatarsal head of a human foot. Therefore, the burden on the base of the toe during walking is reduced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, FIG. 1 showing a plan view of an embodiment of the present invention, FIG. 2 showing a sectional view of FIG. 1, FIG. 3 showing a plan view of another embodiment, and FIG. 4 and FIG. 5 showing a BB cross-sectional view of FIG. 3 will be described.

Reference numeral 11 denotes a substrate. Examples of the substrate 11 used in the present invention include a flexible synthetic resin such as polyurethane, polyethylene, polypropylene, and synthetic rubber, and a fiber assembly, and a thickness of 0.5 to 5 mm.
Degree, more preferably 1-3 mm. Especially 80 degrees (hardness, JISK6301 spring hardness test (C
It is preferable that the material has a surface hardness of at least
Among them, soft polyurethane is preferred. By using a flexible polyurethane foam as the base material 11, it is possible to provide some ease of walking, flexibility, and air permeability during walking. For example, hardness 7-40kg / 314cm
² (based on JIS K6401), and can be obtained by thermally compressing a flexible urethane foam sheet having a thickness of 5 to 100 mm, preferably 10 to 40 mm to an appropriate thickness of 0.5 to 5 mm. If the hardness is less than 80 degrees, the surface may be too soft and may not be suitable as an insole.

Reference numeral 12 denotes a projection. The shape of the convex portion 12 used in the present invention can be selected from a triangular shape, a circular shape, an elliptical shape, an arcuate shape and the like, and the shape is not limited. Base material 1 of convex portion 12
The bottom part in contact with 1 has a vertical and horizontal length of 20 to 50, respectively.
mm. The apex portion of the convex portion 12 has a slightly rounded mountain-shaped convex shape and a height of 3 to 12 mm, preferably 4 to 10 mm. The entire convex portion 12 has substantially the same hardness, and the hardness of the convex portion 12 is preferably in the range of 20 to 60 degrees. As the base 12, as in the case of the base 11, polyurethane, polyethylene, polypropylene, synthetic rubber, fiber aggregate, or the like is used. The protrusion 12 may be the same as or different from the base 11. If the surface hardness is less than 20 degrees, the hardness becomes low, which may not be desirable for measures against hallux valgus. If the hardness exceeds 60 degrees, the surface is generally too hard, depending on the height of the ridges and the shape of the ridges of the protrusions 12, so that it is easy to feel partial pain in the soles during long-time walking. There is.

Reference numeral 13 denotes a skin material. The skin material 13 that can be used in the present invention is not particularly limited, and a woven fabric, a knitted fabric, or a nonwoven fabric incorporating one or more fibers of synthetic fibers such as polyester, polyamide, and polyacrylonitrile or natural fibers is used. Although possible, the kind of the skin material 13 is not limited at all. If hydrophobic fibers are used for the skin material 13, an insole with a feeling that the upper surface is always dry can be obtained. Also,
The skin material 13 may have a multilayer structure of a hydrophobic fiber layer and a hygroscopic fiber layer. With a multi-layer structure using hygroscopic fibers, sweat is absorbed, and the smooth touch of the surface can be further maintained. As the hygroscopic fiber, rayon, wool, cotton, and hollow fibers such as synthetic fibers thereof are used.

The shoe insole is obtained by superimposing the base material 11, the convex portion 12, and the skin material 13 and laminating and integrating them via an adhesive. It is preferable that the base material 11 and the protrusions 12 are laminated via an adhesive. In addition, the skin material 13 is
Although it can be laminated only on the base material 11 or on the base material 11, it is preferable to laminate so as to cover the skin material 13 and the projection 12. As the adhesive, a solvent adhesive, an emulsion adhesive, a hot melt adhesive, or the like can be used.

In the embodiment shown in FIGS. 1 and 2 of the present invention, a convex portion 12 is provided in the vicinity of the second metatarsal head, but if necessary, a skin material 13, an adhesive, a substrate 11, etc. The deodorant and antibacterial properties may be imparted to the surface, and projections may be provided on other portions.

Further, a hot melt is adhered to the back surface of the skin material 13, and the base material 11, the protrusions 12, and the skin material 13 with the hot melt are heated by a heat press method to melt the hot melt. After that, the base material 11, the convex portions 12, and the skin material 13 can be bonded to each other via hot melt.

Further, a display line according to the shoe size may be provided on the back surface of the insole. By cutting along the display line, the position of the convex portion 12 can be set to a predetermined position.

3 to 5, reference numeral 15 denotes a second convex portion. The second convex portion 15 is formed in a convex shape near the arch of the base material 11. As shown in FIGS. 3 to 5, the second convex portion 15 is set on the base material 11 so as to be vertically aligned with the convex portion 12. The shape of the second convex portion corresponds to the concave shape of the arch, and the vertex has a rounded height of 3 to 12 mm, preferably 4 to 10 mm. As the material, the same material as the base material 11 or the convex portion 12 is used, and the surface hardness is 20 to 6.
Those having a range of 0 degrees are preferred. If the surface hardness is less than 20 degrees, the hardness is low, which may be undesirable in terms of hallux valgus. If the hardness exceeds 60 degrees, the surface generally depends on the height and shape of the ridges of the projections 12, but the surface is generally Is too stiff, which may make it easier to feel partial pain in the soles during long-time walking.

(Example 1)

Hardness 10 kg / 314 cm ² Thickness 25 mm
Was heat-compressed to a thickness of 1.5 mm to obtain a base material 11 having a surface hardness of 95 degrees. Separately, a flexible polyurethane foam sheet having a hardness of 11 kg / 314 cm ² was hot-pressed, and thereafter, a mountain-shaped convex portion 12 having a thickness of 8 mm was obtained by a hollowing method. The surface hardness was 41 degrees, and the entire surface exhibited substantially uniform surface hardness.

Thereafter, the base material 11 and the skin material made of a polyester woven fabric provided with the convex portions 12 and the hot melt are superimposed, and the hot melt is heated and melted by a heat press method to form a three-layered structure in the shoe. I got the floor. This insole is
Conventionally, the burden imposed on the first metatarsal bone has been eliminated, and it has a breathable and comfortable insole.

(Comparative Example 1)

Hardness 10 kg / 314 cm ² Thickness 15 mm
The flexible polyurethane foam sheet is left in the vicinity of the head of the second metatarsal bone as it is, and the surrounding area is 2 m away.
By heat compression to a thickness of m, an insole having a convex portion 12 was obtained.

The convex portion 12 of the insole obtained has a low surface hardness and cannot be measured by a surface hardness tester according to JIS K6301 spring hardness test (C type), and the convex portion 12 extends from the front surface to the back surface. The hardness was the same, and the hardness varied stepwise along the chevron.

Further, the convex portion 12 swells also on the back surface, and the smoothness of the back surface of the insole is inferior.

[0031]

Therefore, according to the present invention, the convex portion has a substantially uniform surface hardness, so that the convex portion has good contact with the foot, and is excellent in the supporting force of the top portion. Since it has an appropriate surface hardness, the impact of the first metatarsal head is relieved. The convex portion has an appropriate surface hardness, and is therefore effective in preventing hallux valgus. The convex part is
Since a material different from the base material can be used, there is an advantage that the surface hardness of the projection can be easily changed.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a sectional view of an embodiment of the present invention.

FIG. 3 is a plan view of another embodiment of the present invention.

FIG. 4 is a sectional view taken along the line AA in FIG. 4 of another embodiment of the present invention;

FIG. 5 is a sectional view taken along line BB of FIG. 4 according to another embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Base material 12 Convex part 13 Skin material

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI B32B 27/40 B32B 27/40 (56) References Japanese Utility Model Sho 61-40904 (JP, U) Japanese Utility Model Sho 62-30850 (JP) , U)

Claims (3)

(57) [Claims] 1. A base material, a convex portion provided near the position of the second metatarsal head on the base material, and having a uniform surface hardness to reduce a load applied to the base of the thumb of a foot during walking. Or a flexible shoe insole comprising a skin material laminated on the convex portion. 2. A base material having a hardness of 80 degrees or more, and a second base material on the base material.
A flexible shoe insole comprising: a convex portion having a hardness of 20 to 60 degrees provided in the vicinity of the metatarsal head; and a skin material laminated on the base material and / or the convex portion. 3. A base made of a flexible polyurethane foam having a hardness of 80 degrees or more, and a projection made of a flexible polyurethane foam having a hardness of 20 to 60 degrees provided near a position of a second metatarsal head on the base. A flexible shoe insole comprising a base material and / or a skin material laminated on the projections.