JPH0242163Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial use) This invention uses cork grains to provide heat retention, breathability,
This relates to a shoe insole that has excellent elasticity and puncture resistance, and is comfortable to wear because it fits the shape of the sole of the foot.

(Conventional technology) Cork grains have excellent heat retention, breathability, and elasticity.
It is a good material for shoe insoles.

However, conventional shoe insoles made of cork grains molded into sheets tend to break due to cracks occurring between the cork grains due to bending during use, and the cork grains are brittle, resulting in poor durability. It had the drawback of lacking wear resistance.

Furthermore, since the shape of the foot is determined at the manufacturing stage of the insole, there is no one that fits each individual's sole shape perfectly.

(Problems to be solved by the invention) The object of the present invention is to provide a comfortable shoe insole that has excellent flexibility, durability, abrasion resistance, and elasticity, and fits the shape of the sole of the foot.

(Means for solving problems) The insole of the present invention has the following structure.

A thermoplastic plate n having thermoplasticity and rich in air permeability and elasticity is formed by mixing cork grains with a particle size of approximately 0.2 mm to 1 mm, fibers for nonwoven fabric, and a binder.

In addition, cork particles having a particle size coarser than the above particle size, fibers for nonwoven fabric, and a binder are mixed to form an elastic plate d that does not soften at room temperature and has abrasion resistance, bending resistance, and elasticity.

A thermoplastic plate n laminated with an air-permeable surface material h is arranged in a roughly spoon shape from the non-step part to the center of the heel part, and from the non-step part of this thermoplastic plate n. A substantially foot-shaped insole material A having an elastic plate d integrally arranged around the heel part is formed.

Then, this insole material A is heated to process the thermoplastic plate n into the shape of the sole of the orderer's foot.

(Example) As shown in FIGS. 1 to 3, the insole according to the present invention has a substantially spoon-shaped portion from the entire forefoot portion, the non-stepping portion to the center of the heel portion, and has both front and back surfaces. Material h, r
A substantially foot-shaped insole material A is formed by disposing a thermoplastic plate n laminated with a thermoplastic plate n, and integrally disposing an elastic plate d from the non-stepping part of the thermoplastic plate n to the periphery of the heel. A
is heated to process the thermoplastic plate n into the shape of the sole of the orderer's foot.

As shown in FIGS. 1 and 2, the front and back materials h and r are the entire front part a and the non-step part b to the heel part c.
The material is cotton, non-woven fabric, saran, leather, etc.
It may be made of synthetic leather, pulp board, etc., and is not particularly limited as long as it has excellent breathability and abrasion resistance.

The thermoplastic plate n has thermoplasticity, is highly breathable and elastic, and has a particle size of approximately 0.2 mm as shown in Figure 4.
~1mm fine cork grains 1, non-woven fibers 2
and a thermoplastic binder are mixed, formed into a plate shape, and cut into a substantially spoon shape from the entire forefoot part a and the non-step part b to the center of the heel part c.

The fibers 2 for nonwoven fabrics may be any material as long as they can be mixed uniformly with the cork grains 1 and the binder, and are not particularly limited, but nylon fibers for nonwoven fabrics are preferable.

The binder may be any thermoplastic synthetic resin that softens at about 50°C or higher and hardens at about 50°C or lower.

This is because if a binder that softens at too high a temperature is used, the thermoplastic plate n must be heated to a high temperature when the sole shape is taken, and there is a risk of burns.

In addition, if a binder that softens at too low a temperature is used, the insole will deform during use, resulting in problems such as the foot shape collapsing, which is undesirable.

The binder is not particularly limited, but may be one that uses ultra-low hardness ethyl vinyl alcohol (EVA) resin, synthetic resin such as polyethylene, urethane, isoprene, or other synthetic rubber, natural rubber, etc. alone or in combination. be.

The method for manufacturing this thermoplastic plate n will be explained using the following blending ratios.

Ultra-low hardness EVA resin 32% Natural rubber 16% Nylon fiber 20% Cork grains 32% After thoroughly kneading the ultra-low hardness EVA resin, natural rubber, and various additives on a roll machine, approximately 25 mm long nylon fiber and cork are mixed. The particles are sequentially added, kneaded uniformly, molded by heating and pressure, and cooled to harden the binder to form a plate-shaped thermoplastic plate n.

The elastic plate d has excellent wear resistance, bending resistance, and elasticity, and has a particle size of approximately 1 mm as shown in Figures 3 and 5.
Coarse cork grains 1 of ~3 mm, nonwoven fabric fibers 2, and a binder are mixed and cut into a roughly foot shape from the non-stepping part b to the heel part c, so that the thin part 3 in the center is surrounded by a roughly horizontal U-shape. A slightly thick rising portion 4 is provided on the top.

The fibers 2 for nonwoven fabrics may be any material as long as they can be mixed uniformly with the cork grains 1 and the binder, and are not particularly limited, but nylon fibers for nonwoven fabrics are preferable.

The binder may be a resin-like material that does not soften or change at temperatures ranging from room temperature to about 50°C, and the material is not particularly limited.
Materials with excellent wear resistance and elasticity, such as natural rubber, synthetic rubber, EVA, and urethane, are used singly or in combination.

The method for manufacturing this elastic plate d will be explained using the following blending ratios.

Natural rubber 42% Hardening agent 8% Nylon fiber 25% Cork grains 25% A binder consisting of 1 cork grain, 2 fibers for nonwoven fabric, natural rubber and a hardening agent is thoroughly mixed, heated and pressurized to form it, and then cooled. , the binder is cured to form a plate-shaped elastic plate d.

Next, a method for manufacturing a shoe insole according to the present invention will be explained.

Adhesive is applied linearly to the front and back surfaces of a thermoplastic plate n cut into a substantially spoon shape, and the front and back materials h and r cut into a substantially spoon shape are adhered to each other.

Apply adhesive in a line on the back side from the unstepped part b to the heel part c, and apply the adhesive to the thin part 3 in the center of the elastic plate d.
The peripheral edge of the thermoplastic plate n from the non-stepping part b to the heel part c is surrounded by the rising part 4 of the elastic plate d in a substantially horizontal U-shape,
As shown in FIGS. 1 to 3, the insole material A is formed.

Heat this insole material A in a heating device B such as an oven for approx.
Heat to 50° C. to soften and deform the thermoplastic plate n.

As shown in FIG. 6, the orderer's foot D is placed on the insole material A in this state, and the shape of the sole of the foot D is taken, and the insole material A is cooled and hardened to form an insole.

At this time, the step 5 between the heel part of the thermoplastic plate n and the vicinity of the rising part 4 of the elastic plate d disappears due to the deformation of the thermoplastic plate n and becomes substantially flat, so that it fits perfectly to the shape of the sole of the foot. This creates an insole with excellent grip.

In the above embodiment, an example was explained in which the thermoplastic plate n was arranged in a substantially spoon shape from the entire forefoot part a and the non-step part b to the center part of the heel part c. As shown, an elastic plate d may be disposed on the heel c, and a thermoplastic plate n may be disposed over the entire forefoot portion a and the central portion of the non-tread portion b.

Further, as shown in FIG. 9, an elastic plate d may be arranged on the non-stepping part b and the heel part c, and a thermoplastic plate n may be arranged only on the entire front part a.

In the embodiment described above, the surface material h is arranged only on the surface of the thermoplastic plate n, but the surface material h may be arranged on the entire surface of the substantially foot-shaped surface.

In the above embodiment, the entire front step part a and the unstepped part b
The explanation has been given using an example in which the backing material r is used in the center part of the heel part c, but it is also possible to arrange the backing material r only on the entire forefoot part a, or as shown in FIG.
may be omitted, and the thin part 3 of the elastic plate d may be bonded directly to the back surface of the thermoplastic plate n, and the back surface material r
There are no particular limitations on the location where the is placed.

In the above embodiment, the step 5 between the heel c of the thermoplastic plate n and the vicinity of the rising part 4 of the elastic plate d was explained as being eliminated by softening and deforming the thermoplastic plate n.
As shown in the figure, the heel part c of the thermoplastic plate n may be provided near the rising part 4 of the elastic plate d to eliminate the difference in level between the thermoplastic plate n and the elastic plate d.

That is, if the thermoplastic plate n from the non-stepping part b to the heel part c is made longer or wider, there is no need to provide the step 5 in advance, and the thermoplastic plate from the non-stepping part b to the heel part c is When n is shortened or the width is narrowed, it is necessary to increase the thickness in advance by the softening deformation of the thermoplastic plate n, so the step 5 is provided.

In the above embodiment, the thermoplastic plate n has front and back materials h and r.
The explanation has been given using an example in which the adhesive is applied in a line when adhering these items, but it is sufficient to ensure air permeability even when these items are adhered, and the adhesive may be applied in a mesh or dot form, and there are no particular restrictions. It's not something you do.

In the method of manufacturing the shoe insole of the above embodiment, when the front and back materials h and r and the thermoplastic plate n are laminated and integrated, the order of the lamination work and the cutting work is not particularly limited.

In the above embodiment, the thermoplastic plate n, the elastic plate d, the front and back materials h and r, etc. were laminated integrally with adhesive, but adhesive, sewing, heat welding, etc. may be used alone or in combination. They may be laminated and integrated.

In the above embodiment, an example was explained in which the insole material A was heated with a heater B such as an oven, but the insole material A may be heated by placing it in a bag together with a heating element, and the insole material A may be heated. The method is not particularly limited.

In addition, the temperature at which the insole material A is heated is 50° C., which was explained as an example in the above embodiment, but the temperature is such that when the foot D is placed on it, there is no burn and the thermoplastic plate n of the insole material A is softened and deformed. That's fine.

In other words, the time it takes to place foot D on heated insole material A is only a few seconds; the temperature that feels hot varies from person to person; and Due to the fact that it is adjustable, the temperature at which the insole material A is heated is not particularly limited, but is merely a guideline for safety reasons.

(Operation and effect of the invention) The shoe insole according to the invention has the above-mentioned structure, and includes a thermoplastic plate n and an elastic plate d made of cork grains, nonwoven fabric fibers, and a binder. In order to heat the board n and process it into the desired sole shape, the cork grains are uniformly dispersed between the nonwoven fabric fibers, the cork grains, the nonwoven fabric fibers, the fibers, the thermoplastic board n, the elastic board d, and the surface material. h etc. are strongly bonded and have excellent flexibility, shape retention, and durability.

The shoe insole according to the present invention has the above-mentioned structure, and is integrated with thermoplastic plates n and elastic plates d made of cork grains, nonwoven fibers, and a binder, so that heat retention and Excellent breathability and elasticity.

The shoe insole according to the present invention has the above-described structure and has a layered surface material h, so it has excellent wear resistance.

The shoe insole according to the present invention has the above-mentioned structure and is equipped with a thermoplastic plate showing thermoplastic properties, so it can be processed into a desired foot shape and fits perfectly to the sole shape. , has a good grip.

The shoe insole according to the present invention has the above-mentioned structure, and the thermoplastic plate n and the elastic plate d, which have different properties and are made of cork grains, nonwoven fibers, and a binder, are integrally laminated. , it is possible to eliminate the drawbacks that occur when cork grains are made into a sheet, and to fully exhibit the characteristics of cork grains.

The shoe insole according to the present invention has the above-described structure, and has an elastic plate d extending from the non-stepping part b of the thermoplastic plate n to the heel part c.
Since the insole is integrally arranged, when used in ski boots etc., it can be firmly stored inside the shoe and the insole does not move inside the shoe.

[Brief explanation of the drawing]

Fig. 1 is a surface view of the shoe insole according to the present invention, Fig. 2 is a side view of the shoe insole according to the present invention, Fig. 3 is a partially omitted enlarged sectional view taken along the - line in Fig. 1, and Fig. 4 The figure is a partially enlarged view of the thermoplastic plate according to the present invention, FIG. 5 is a partially enlarged view of the elastic plate according to the present invention, FIG. 6 is an explanatory diagram showing how to use the insole material of the present invention, Figure 7 is a partially omitted enlarged sectional view of the heel area of another shoe insole according to the present invention, Figures 8 and 9 are surface views of other shoe insoles according to the present invention, and Figure 10 is a 9 is an enlarged cross-sectional view taken along the line - in FIG. 9, with a portion omitted; FIG. A... Insole material, B... Heater, D... Feet, a
...Front step part, b...Non-step part, c...Heel part, d...
Elastic plate, h...surface material, n...thermoplastic plate, r...
Back material, 1...Cork grains, 2...Fiber for nonwoven fabric,
3...Thin part, 4...Rising part, 5...Step.

Claims (1)

[Scope of claims for utility model registration] 1. Fine cork particles with a particle size of approximately 0.2 mm to 1 mm;
A thermoplastic board n which is made by mixing fibers for non-woven fabric and a binder and has thermoplasticity and is rich in breathability and elasticity, cork grains coarser than the above particle size, fibers for non-woven fabric and a binder are mixed. The thermoplastic plate n is composed of an elastic plate d that does not soften at room temperature and has wear resistance, bending resistance, and elasticity, and a surface material h, and is disposed over at least the entire front step part.
, an elastic plate d forming the other part is integrally arranged,
This shoe insole is characterized in that a substantially foot-shaped insole material A is formed by laminating surface materials h, and this insole material A is heated to be processed into a desired sole shape. 2. The insole material A has a thermoplastic plate n laminated with a surface material h placed over the entire front part and the central part from the unstepped part to the heel part, and from the unstepped part of this thermoplastic board n to the heel part. The shoe insole according to claim 1, wherein an elastic plate d is integrally arranged around the periphery of the insole. 3. The shoe insole according to claim 1 or 2, wherein the elastic plate d is provided with a slightly thick rising portion 4 in a substantially horizontal U-shape at the heel portion.