JP3037118B2 - Insoles for shoes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe insole excellent in fit and stability of a heel.

[0002]

2. Description of the Related Art Conventionally used insoles for shoes have a flat shape in which a sheet-like material made of leather, felt, or an elastic body of synthetic resin is punched into a foot shape, or a stepped portion. What is called a cup insole that is raised so that the edge of the heel rises along the shape of the heel is provided, especially in sports shoes this cup insole is heavily used, A pile-shaped cloth or a non-woven cloth with good hygroscopicity per foot is adhered to the surface part in contact with the foot.

The purpose of these cup insoles is to fill the space between the foot and the inner surface of the shoe in the shoe, improve the fit of the foot, particularly the heel, and increase the stability of the heel during walking or running. It was used in. Further, these cup insoles are provided in various forms depending on the intended use, such as those having a hard body, those having a soft body, and those having a combination thereof. The most common type is also compressed and deformed according to the shape of the heel by the pressure received from the heel, and is restored when the wearer takes off the shoe. For example, Japanese Utility Model Publication No. 61-16807 and Japanese Utility Model Publication No. 62-28163
As described in Japanese Unexamined Patent Application Publication No. Hei 6 (1994) -7126, once the shoe is compressed and deformed, the wearer does not recover even if he takes off his shoes, or as described in Japanese Utility Model Publication No. 62-7126. Mix synthetic resin with hardener,
Pour it into the bag, put the foot on the bag, shape it along the sole, and when the foaming resin is completely cured, it will be a cup-insole with good adhesion formed in the shape of the sole Are disclosed.

The impact buffer layer used in these cup insoles and the void filling material in the shoe are made of polyurethane or polyolefin or other foamable synthetic resin having the same effect. Most use the property of compressive deformation as a characteristic. Therefore, when a wearer wears shoes using these cup insoles, the shock absorbing layer of the cup insole made of foamable synthetic resin is compressed and deformed by the weight of the wearer, and the shape of the sole of the wearer's sole It becomes the shape along.

[0005] The shock absorbing layer absorbs the impact from the ground while compressing and deforming against the strong impact force received from the ground during walking or running. At that time, the shock absorbing layer is made of a foamable synthetic resin. The impact buffer layer deformed freely under the pressure from the heel, and could not prevent the heel from shifting. For this reason, the heel may not be stable during walking or running, and the impact buffer layer may sway, which may cause over-pronation or over-reproduction of the ankle, resulting in an obstacle to the leg. Polyolefin foamed resin or chloroprene rubber foam is generally used as the material used for the impact buffer layer and the void filling material of these cup insoles, but these materials are repeatedly compressed by wearing. As a result, settling, which is generally referred to, occurs, and the flexibility and the resilience are remarkably reduced, and the function as an impact buffer layer or a void filler may not be exhibited.

[0006] In order to improve these disadvantages, the applicant of the present invention has filed a utility model registration application 1993 No. 75342 "Cup Insole" (hereinafter referred to as Japanese Utility Model Application No. 5-75342). ). The bottom of the cup insole body made of an elastic material is shaped to fit the bottom of the shoe, and the side wall and the top of the heel from the instep instep to the outer heel through the back of the heel. The flat portion has a concave curved surface shape formed continuously, an impact buffer using a bouncing putty is installed on the upper surface of the side wall portion, and is covered and locked by any one of cloth, nonwoven fabric, and leather It is a cup insole having a configuration.

[0007] The bouncing putty used for the shock-absorbing material has such a property that it easily undergoes plastic deformation under moderate stress and exhibits good rebound resilience against shocking stress. Also, the bouncing putty is often used as a bouncing putty / sponge impregnated with a bouncing putty in a foaming space portion of a foam of a simultaneous cell type such as a polyurethane sponge, and the bouncing putty / sponge is suitable for surrounding the heel. It is used as a horseshoe or cut out into blocks for other uses. And
The bouncing putty sponge is used after being covered with the synthetic resin film, and a polyurethane film, a silicone rubber film, or the like is used as the synthetic resin film.

[0008]

However, the above-mentioned "cup insole" has a sufficient function in terms of shock absorption and formability, but because of its heavy weight and the large amount of bouncing putty and sponge used. It had economic problems such as becoming relatively expensive. Therefore, even if the amount of the bouncing putty sponge is reduced, the aforementioned Japanese Utility Model Application No.
What has the same effect as the invention of No. 75342 has been demanded.

[0009]

[Means for Solving the Problems] There are two types of sports: running, baseball and rugby.
Considering sports that are relatively gentle exercises such as walking and golfing, shoes used for the latter relatively gentle exercises must be stabilized on both sides of the boundary between the arch and heel areas. It has been found that when the adhesion to the shoe is improved, the mobility is remarkably improved.Therefore, the shoe has an arch portion region and a heel region, and a cup-shaped wall portion is provided on the rim of the stomping portion of the heel region. Forming an insole body formed integrally with the insole body, forming a storage hole near the periphery of both sides of the boundary between the arch portion region and the heel region of the insole body,
A pad material having shaping and cushioning properties is stored in the storage hole such that the upper surface of the pad material is protruded from the surface of the tread portion, and the extended portion of the pad material is connected to the insole body and the backing material. This problem is solved by forming a shoe insole having a configuration inserted and fixed between the insole.

[0010] The material used for the pad material may be a silicone bouncing putty sponge or a polyurethane bouncing putty sponge alone, or a silicone bouncing putty sponge or a latex sponge having a small compression set on the lower surface of the polyurethane bouncing putty sponge. A pad material is formed by adhering an elastic body consisting of:
Covered with polyurethane, polyvinylidene chloride, polyvinyl chloride, low-density or medium-density polyethylene, or a synthetic resin film having the same effect as these.

[0011]

[Function] When the foot is inserted into the shoe into which the shoe insole is inserted,
Since the pad material provided in a protruding manner at the boundary between the arch and heel regions has shapeability, the shape of the both sides of the boundary between the arch and heel regions of the foot is gradually increased according to the weight added. It has a function of preventing the loss of force during exercise by deforming to eliminate the gap with the shoe sole, keeping the foot in close contact with the shoe, stabilizing the heel, and preventing loss of force during exercise.

[0012] Further, with respect to the impact stress applied to the sole of the shoe, a bouncing putty sponge or a bouncing putty sponge and an elastic body provided on the lower surface of the bouncing putty sponge and having a small compression set, such as latex sponge, It is relieved by a shock-absorbing effect of a synergistic effect made of a combination of a polyurethane foam and an elastic material having the same effect as above, and exhibits an effect of preventing injury to the foot. Further, the bouncing putty sponge or the cushioning material made of the bouncing putty sponge and an elastic body having a small compression set was covered with a coating material of a synthetic resin film, and an arbitrary number of ventilation holes were provided at a desired portion of the extension. By adjusting the shape, quantity and intake / exhaust volume of the ventilation holes, it is also possible to utilize the buffering effect of air elasticity, and even if a small amount of bouncing putty / sponge is used, The same effect as that of the invention of Japanese Patent Application No. 5-75342 can be expected.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a shoe insole according to the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a shoe insole according to the present invention.
FIG. 2 is an enlarged end view cut along the line XX in FIG. 1. FIG. 3 is a rear view of the shoe insole according to the present invention. FIG. 4 is a side view of the shoe insole according to the present invention. FIG. 5 is a plan view of a pad material. FIG. 6 is an enlarged end view cut along the line YY in FIG. 5. FIG. 7 is an explanatory view showing a skeletal view of the human foot and the arrangement relationship of the pad material.

Forefoot area (A) and arch area (B)
And a heel region (C), and a wall portion (4) is continuously and integrally formed on a peripheral portion (5) of a step portion (3) of the heel region (C) to form an insole body (2). . Next, the insole body (2) is housed in the vicinity of the inner and outer peripheries (5) on both sides of the boundary (17) between the arch region (B) and the heel region (C). A hole (6) is formed, and the upper surface of the pad material (7) having shaping and cushioning properties is housed in the housing hole (6) so as to protrude (F) from the surface of the step portion (3). Then, the extension part (11) of the pad material (7) is inserted between the insole body (2) and the backing material (8), and bonded with an adhesive or the like to form the insole (1) for shoes.

As a pad material (7) having shaping properties and cushioning properties, as shown in FIG.
As shown in FIG. 6 (a), a sponge (13) alone or a latex sponge or polyurethane foam having a small compression set and a similar elastic body (14) are provided on the lower surface of the bouncing putty sponge (13). ) Is used. When an example of the composition of the bouncing putty of the bouncing putty and sponge is exemplified by a silicone bouncing putty, the silicone bouncing putty is made of a siloxane containing a boron atom. When a sharp impact is applied to it, it breaks like a brittle glass and gradually deforms into a flat plate when left to stand. When it is rolled into a ball, it has the property of bouncing more than a rubber ball.

The sponge of the bouncing putty sponge is an open-cell body, and any sponge having an internal communication space can be used. For example, polyethylene, which is generally called an open-cell sponge, Polystyrene, polyvinyl chloride, polyurethane, phenolic resin, urea resin, open-cell foam of silicone resin and other synthetic resin foams made by foaming materials of the same effect are also available.In addition, sponge, cork, etc. A porous substance made of a porous natural substance or a fibrous substance such as a woven cloth or a nonwoven cloth can be used.

The bouncing putty / sponge is formed by dissolving the bouncing putty with an alcohol, an ester, or another solvent, impregnating the open-cell body, filling the cell space with the solvent, and then adding the solvent. Volatilize to form bouncing putty sponge (13). next,
The bouncing putty sponge (13) or an elastic body (14) made of a latex sponge or the like having a small compression set is attached to the lower surface of the bouncing putty sponge (13) to form a desired shape. 50-150
It is coated in a pack with a coating material (12) of μm polyurethane, polyvinylidene chloride, polyvinyl chloride, low density or medium density polyethylene, or a synthetic resin film having the same effect. The extension (1) of this coating material (12)
1) is provided with a vent (10). The vent (10)
When the pad material (7) is compressed, air in the bubble space of the bouncing putty sponge (13) or air contained in the elastic body (14) provided on the lower surface of the bouncing putty sponge (13) is removed. The elasticity can be adjusted by the air to be discharged by adjusting the shape, the number, and the amount of intake and exhaust of the ventilation holes (10).

The shape of the pad material (7) is at least the boundary portion (17) between the arch region (B) and the heel region (C).
It is only necessary to cover the vicinity of the peripheral portion (5) on both sides of the arch, and the inside of the arch shown in FIG. 7A and the arch shown in FIG. Any shape may be used as long as it holds the outside of the part (the foot skeleton diagram in FIG. 7 shows the side on the inner instep side of the right foot as b and the side on the outer instep side as b). EXAMPLE The shape of the pad material (7) shown in FIG. 1 was formed in a substantially elliptical shape with a thin shoe tip and a thick rear portion, but is not limited to this shape.

The insole body (2) is located in the forefoot region (A).
A cup-shaped wall portion (4) is continuously and integrally formed on a peripheral portion (5) of a tread portion (3) of the heel portion region (C), comprising an arch portion region (B) and a heel portion region (C). It is made
As the material used for the insole body (2), a material having good thermoformability, such as a rubber sponge, a synthetic resin sponge such as EVA, polyethylene, or polyurethane, and a non-woven fabric made of synthetic fibers is used. Insole body (2) used in Figure 1
Is the peripheral portion (5) of the stepped portion (3) of the heel region (C)
The forefoot member (16) forming the forefoot region (A) is formed of an elastic material, and the boundary portion of the arch portion region (B) is sewn together. However, the forefoot region (A), the arch region (B), and the heel region (C) may be integrally formed of a single material, for example. The forefoot region (A) is made of a nonwoven fabric, and the materials of the arch region (B) and the heel region (C) are made of thermoformed synthetic resin. It is arbitrarily carried out, for example, by sewing with a thermoformed product of the body. Backing material (8) is storage hole (6)
The pad material (7) inserted into the insole is prevented from falling off, is backed with a cloth (9) such as a synthetic fiber woven cloth, and is fixed to the back surface (E) of the insole body (2) with an adhesive ( 15)
I do.

[0020]

When the foot is inserted into the shoe in which the shoe insole is inserted, storage holes are formed in the inner and outer insteps at the boundary between the arch region and the heel region. A pad in which the upper surface of a pad material having shaping and cushioning properties is housed in a hole so as to protrude from the surface of the tread portion, and an extended portion of the pad material is inserted and fixed between the insole body and the backing material. Since the material has shaping properties, the gap between the foot and the sole of the foot is eliminated at the inner and outer perimeters at the boundary between the arch and heel region of the foot by the gradually added weight. Shape is deformed,
It has the effect of stabilizing the heel by keeping the foot in close contact with the shoe and preventing loss of force during exercise.

In addition, the shock stress applied to the sole of the shoe is alleviated by the shock-absorbing action of the bouncing putty sponge and the pad material formed on the lower surface of the bouncing putty sponge, thereby preventing foot injury. I do. Further, since the pad material is provided with an arbitrary number of ventilation holes at a desired portion of the extension portion, when the pad material is compressed, the air of the coating material is discharged from the ventilation holes. Since the intake and exhaust volumes can be adjusted by the quantity and the like, it is also possible to use the buffering effect of the elasticity of air, and even if a small amount of bouncing putty / sponge is used, Japanese Utility Model Application No. 5-75342. It is possible to expect an effect equal to or better than that of the invention.

Further, since the upper surface of the pad material is housed so as to protrude from the surface of the tread portion, the upper surface of the protruding portion locally stimulates the sole, and a finger pressure effect is also expected. You can do it.

[Brief description of the drawings]

FIG. 1 is a plan view of a shoe insole according to the present invention.

FIG. 2 is an enlarged end view of a section taken along line XX in FIG. 1;

FIG. 3 is a rear view of the shoe insole according to the present invention.

FIG. 4 is a side view of a shoe insole according to the present invention.

FIG. 5 is a plan view of a pad material.

6 is an enlarged end view cut along a line YY in FIG. 5;

FIG. 7 is an explanatory diagram showing a skeleton diagram of a human body foot and an arrangement relationship of a pad material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insole for shoes 2 Insole main body 3 Stepping part 4 Wall part 5 Peripheral part 6 Storage hole 7 Pad material 8 Backing material 9 Fabric 10 Vent hole 11 Extension part 12 Coating material 13 Bouncing putty / sponge 14 Elastic body 15 Fixing 16 Forefoot Member 17 Boundary part A Forefoot part area B Arch part area C Heel part area D Surface part E Back part F Projecting shape

Claims (5)

(57) [Claims] 1. An insole body comprising a forefoot region, an arch region, and a heel region, wherein a wall portion is continuously and integrally formed on a peripheral portion of a tread portion of the heel region. A storage hole is formed in the peripheral portion of the inner instep and the outer instep at the boundary of the heel region and a pad material having shaping and cushioning properties. An insole for shoes, wherein the insole is housed so as to protrude from the surface of the shoe, and an extension of the pad material is inserted and fixed between the insole body and the backing material. 2. The shoe insole according to claim 1, wherein the pad material is made of a bouncing putty / sponge. 3. The shoe insole according to claim 1, wherein the pad material has an elastic body having a small permanent compression set attached to a lower surface of a bouncing putty sponge. 4. The pad material according to claim 1, wherein the pad material is covered with a covering material made of a synthetic resin film, and an arbitrary number of ventilation holes are provided in a desired portion of the extension. Insole for shoes described in. 5. The coating material has a thickness of 50 to 150 μm.
5. The film according to claim 1, wherein the film is made of polyurethane, polyvinylidene chloride, polyvinyl chloride, low-density or medium-density polyethylene, or a synthetic resin film having the same effect as these. Insole for shoes.