JPH0693845B2 - How to make insoles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an insole for promoting health by applying magnetic field lines and pressure stimuli to the sole of the foot, and in particular, the present invention has a reinforcing cloth plate embedded inside. It relates to a method of manufacturing a shoe insole having a reinforced structure.

[0002]

2. Description of the Related Art As a conventional insole, as shown in FIG.
A plurality of protrusions 21 are formed on the arch portion of the main body 20 of the leather insole.
There is one in which a rubber plate 22 having is attached. The rubber plate 22 has a structure in which permanent magnet particles are embedded in the respective projections 21.
It is integrally fixed by being inserted into the groove 23 provided in 0.

However, in the case of this type of insole, the insole body 2
Since there is only a magnetized portion in a part of 0, magnetic force lines cannot act on the entire sole, and it is difficult to obtain a sufficient magnetic therapeutic effect. Further, since the rubber plate 22 has poor physical strength, if bending stress or the like is applied during use,
There were major problems in terms of durability, such as cracks in the rubber plate 22 and the rubber plate 22 being cut into pieces and becoming unusable.

In order to solve these problems, the applicant of the present invention pressurizes and magnetizes a mixture of rubber and magnetic powder to form a main body of the insole, and at the center of the inside of the main body of the insole.
We have developed a structure that embeds one reinforcing fabric plate (Actual No. 61-43403). According to this structure, magnetic lines of force can be applied to the entire sole of the foot, and further, it is possible to prevent the insole body from being fragmented due to bending stress, and the durability of the insole body can be improved.

However, in the above-mentioned improved product, the reinforcing fabric plate effectively functions to prevent tearing and shredding of the insole body, but it is almost impossible to prevent cracks occurring on the front and back surfaces of the insole body. , It is difficult to expect sufficient physical strength. Moreover, when a protrusion is integrally formed on the surface of the insole body, if the base end portion of the protrusion is cracked, the protrusion will fall off, resulting in a significant reduction in the therapeutic effect of the pressure stimulus. There is a problem.

[0006]

In order to solve the above problems, the applicant of the present invention is to adhere two reinforcing cloth plates to the front and back surfaces of the insole body and to embed each reinforcing cloth plate inside the protrusion. As a result, we devised an insole that prevents cracks from occurring on the front and back surfaces of the insole body and prevents protrusions from falling out of the insole body.

However, it is not easy in manufacturing to bond two reinforcing cloth plates to the front and back surfaces of the insole body by embedding the two reinforcing cloth plates inside the protrusions. Since the reinforcing fabric plates may be peeled off from the main body of the insole even after the bonding, the strength and durability of the insole are deteriorated.

The present invention has been made in view of the above problems. Reinforcing cloth plates can be embedded near the front and back surfaces of the main body of the insole, and the reinforcing cloth plates can be completely removed from the main body of the insole. It is intended to provide a method of manufacturing an insole which can be prevented.

[0009]

SUMMARY OF THE INVENTION The present invention is a method for manufacturing a magnetic insole having a plurality of protrusions formed on the front and back surfaces thereof, in which a kneaded material of rubber and magnetic powder is compressed into a plate shape. After molding the rubber magnet plate, two reinforcing cloth plates made of a woven cloth treated with an adhesive treatment agent are placed facing each other with the rubber magnet plate sandwiched in the center, and these three members are pressed in a heated state. As a result, each reinforcing cloth plate was embedded in the rubber magnet plate in the vicinity of the front surface and the back surface thereof, and the three members were integrally joined by heat welding of the adhesive treatment agent to manufacture the insole.

[0010]

[Function] Since the rubber magnet plate is made of the kneaded material of rubber and magnetic powder, and the woven cloth treated with the adhesive treatment agent is used as the reinforcing cloth plate, the rubber magnet plate is sandwiched in the center to reinforce the two members. When the dough plates are placed facing each other and heated / pressurized, the raw material of the rubber magnet plate is guided onto each of the reinforcing dough plates from the texture of each reinforcing dough plate, and the magnetic powder appropriately prevents the raw material from moving. The reinforcing cloth plates are located along the front surface and the back surface of the insole body in an embedded state, and the reinforcing cloth plates are strongly bonded to the insole body by heat welding of the adhesive treatment agent to prevent peeling.

[0011]

1 shows an insole 1 produced by carrying out the present invention. FIG. 1 shows the appearance of this embodiment, and FIG. 2 shows the internal structure of this embodiment. . The insole 1 of the illustrated example has large projections 3a, 3b and small projections on the front and back surfaces (hereinafter, for convenience of explanation, a is the front surface and b is the back surface) of a thin-walled insole body 2 having a sole shape. Projection groups 5a and 5b including 4a and 4b are integrally formed, and a large number of vent holes 6 (indicated by + in FIG. 1) are formed through the entire surface of the insole body 2.

The projection groups 5a and 5b on the front and back surfaces are selectively used according to the intention of the user. When the insole 1 is inserted into the shoe, one projection group hits the sole surface of the foot and functions for treatment.
The other projection group hits the sole of the shoe and forms a ventilation gap with the insole body 2. Since the two projection groups 5a and 5b have different magnitudes in the pressure stimulus to the human body, the large projections 3a and the small projections 4a in one projection group 5a have a mountain shape with a pointed top, and the large projections 3b in the other projection group 5b. The small projections 4b and the small projections 4b are each formed in a flat shape and a mountain shape with a round top. Of the protrusions, the large protrusions 3a and 3b are arranged in a large number in the arch position P, four in the knuckle position Q, and one in the heel position R, and the small protrusions 4a and 4b are evenly arranged in all other positions. Will be deployed to.

As shown in FIG. 3, the main body 2 of the insole has two reinforcing cloth plates 8 having flexibility inside the rubber magnet plate 7.
9 is buried, and a protective coating 10 made of polyurethane coating or the like is formed on the entire front and back surfaces of the rubber magnet plate 7.

The rubber magnet plate 7 is formed by using a mixture of a synthetic rubber such as NBR rubber (nitrobutadiene rubber) and a magnetic powder such as ferrite as a main raw material.
An N pole is magnetized on the side of the front surface a and an S pole is magnetized on the side of the back surface b, and a magnetic flux density of about 400 to 600 gauss is given at each projection position.

Each of the reinforcing fabric plates 8 and 9 has a shape that matches the shape of the main body 2 of the insole, and a cotton woven cloth or a nylon fiber woven cloth is used. One of the reinforcing fabric plates 8 is located along the vicinity of the front surface a of the insole body 2, and the other reinforcing fabric plate 9 is located along the vicinity of the back surface b of the insole body 2 in an embedded state. , Reinforcement cloth plates 8 and 9 with large projections 3a and 3
At each position of b and the small protrusions 4a and 4b, the protrusion is formed inside the thickness of the protrusion.

FIG. 4 shows the insole body 2 according to the present invention.
The manufacturing method of is specifically shown. First, step 1 is to adjust the raw material of the rubber magnet plate 7. Synthetic rubber such as NBR rubber and ferrite powder are mixed at a weight ratio of 1:15, and the mixture is mixed with a crosslinking agent and zinc white. , Sulfur, a vulcanizing agent, a softening agent (for example, DOP-dioctyl phthalate), etc. are added and kneaded. Next step 2 is a step of shaping the rubber magnet plate 7, in which the adjusted raw material is compressed by a roller to form a plate-like object having a uniform thickness, and then cut into a predetermined size.

In the next step 3, as shown in FIG. 5, the two reinforcing cloth plates 8 and 9 are opposed to each other with the rubber magnet plates 7 and 7 sandwiched in the center, and these three members are heated using a hot plate mold. Pressurize for a certain time in a warm state. The temperature at this time is, for example, about 135 ° C., and the pressurizing time is 3 to 4 minutes. In this heating / pressurizing step, the projection groups 5a and 5b are formed on the front and back surfaces, and the reinforcing cloth plates 8 and 9 are embedded in the rubber magnet plate 7 at positions near the front and back surfaces. become. Moreover, at the respective positions of the large protrusions 3a and 3b and the small protrusions 4a and 4b, the respective reinforcing cloth plates 8 and 9 penetrate into the inside of the thickness of the protrusion and effectively function to reinforce the protrusion.

In the case of this embodiment, the reinforcing fabric plates 8 and 9 are used.
As a polycapramide (structural formula: [NH (CH ₂ ) ₅ C
O] _n ) as a component treated with an adhesive treatment agent comprising a mixture of resorcin-formaldehyde polycondensate, butadiene-styrene-vinyl-pyridine copolymer, butadiene-styrene copolymer When the rubber magnet plate 7 is superposed and heated / pressurized, the adhesive treatment agent is melted by heat to firmly and integrally join the reinforcing cloth plates 8 and 9 and the rubber magnet plate 7.

In the next step 4, the outer shape of the insole body 2 is completed by simultaneously punching the molded body and punching the ventilation holes 6, and in step 5, the front and back of the insole body 2 are completed. The entire surface is coated with a two-component elastic polyurethane resin paint, thereby forming a protective film 10 having excellent wear resistance.

Next, in step 6, the whole of the insole body 2 is magnetized and magnetized, and N is applied to the surface a side of the insole body 2.
The S pole is magnetized to the pole and the back surface b side. In this example,
By the magnetizing process in this step, the large protrusions 3a and 3b are 550
A magnetic flux density of 400 gauss is applied to the Gausses and the small projections 4a and 4b, and 180 gauss is applied to the other plane portions. Then, in the final step 7, packaging and other processing are performed to complete the product.

When this shoe insole 1 is used, for example, when the back surface b is placed on the sole side and inserted into the shoe, the projection group 5b is formed.
Due to this, a ventilation gap is formed between the bottom surface of the shoe and the insole 1, so that evaporation of perspiration is promoted together with the ventilation hole 6 and it effectively functions to prevent unevenness. Put your foot on this insole 1,
The projection group 5a on the front surface a side comes into contact with the sole surface of the foot, and a strong pressing stimulus is given to the entire sole by the large and small projections 3a and 4a, and at the same time, the magnetic force lines by the rubber magnet plate 7 act effectively. When the pressure stimulus is excessive, the shoe insole 1 is inverted and used, and the light pressure stimulus by the protrusion group 5b on the back surface b side is selected.

When bending stress is applied to the insole 1 when putting on and taking off shoes or walking, since two reinforcing cloth plates 8 and 9 are embedded inside the insole body 2, the insole due to bending stress is applied. The occurrence of cracking or shredding of the main body 2 is completely prevented.

Moreover, the two reinforcing cloth plates 8 and 9 are located in an embedded state along the front surface a and the back surface b of the insole main body 2. Since it is strongly bonded to the rubber magnet plate 7 by the joining force by, the occurrence of cracks on the front and back surfaces of the insole body 2 is completely prevented. In particular, the large protrusions 3a and 3b and the small protrusion 4
Since cracks are unlikely to occur at the base end portions of a and 4b, it is possible to prevent these projections from falling off during use, and since each reinforcing fabric plate 8 and 9 is inside the wall thickness of each projection, The function of preventing protrusions from falling off is further enhanced.
Furthermore, since the front and back surfaces of the insole body 2 are covered with the protective coating 10, the insole body 2 has excellent abrasion resistance and physical strength sufficient to withstand normal use.

[0024]

As described above, according to the present invention, a kneaded product of rubber and magnetic powder is compressed into a plate shape to form a rubber magnet plate,
Two reinforcing fabric plates made of a woven fabric treated with an adhesive treatment agent are placed opposite to each other with the rubber magnet plate sandwiched in the center, and each of the reinforcing fabric plates is pressed by heating these three members in a heated state. Cracks on the front and back surfaces of the main body of the insole were produced by embedding it in the vicinity of the front and back surfaces inside the rubber magnet plate and integrally joining the three members by heat welding of the adhesive treatment agent to produce the insole. It is possible to completely prevent the occurrence of cracks and the protrusion of the insole from the main body of the insole, and there is no fear that the reinforcing fabric plates are separated from the main body of the insole, and the strength and durability of the insole are enhanced. Furthermore, by simply heating and pressing the rubber magnet plate in the center between the two reinforcing cloth plates, each reinforcing cloth plate can be easily placed in a buried state along the front and back surfaces of the rubber magnet board. It is possible to produce a sock insole having excellent strength without requiring special steps, and the remarkable effects of achieving the object of the invention are achieved.

[Brief description of drawings]

FIG. 1 is a plan view showing a shoe insole manufactured by carrying out the present invention.

FIG. 2 is a vertical cross-sectional view of the insole taken along the line AA of FIG.

FIG. 3 is an enlarged cross-sectional view showing a protruding portion of the insole body.

FIG. 4 is a process explanatory view showing the manufacturing procedure of the insole of the present invention.

FIG. 5 is a perspective view for explaining one step in the method of manufacturing the insole.

FIG. 6 is a plan view showing a conventional example of a shoe insole.

[Explanation of symbols]

 1 Insoles 3a, 3b Large protrusions 4a, 4b Small protrusions 7 Rubber magnet plate 8, 9 Reinforcing fabric plate

Claims (1)

[Claims] 1. A method for manufacturing a magnetic insole having a plurality of protrusions formed on the front and back surfaces, wherein a kneaded material of rubber and magnetic powder is compressed into a plate shape to form a rubber magnet plate, Two reinforcing fabric plates made of a woven fabric treated with an adhesive treatment agent are placed opposite to each other with the rubber magnet plate sandwiched in the center, and each of the reinforcing fabric plates is pressed by heating these three members in a heated state. A method for manufacturing an insole, which comprises burying the rubber magnet plate in the vicinity of the front surface and the back surface inside the rubber magnet plate and integrally joining the three members by heat welding of the adhesive treatment agent to manufacture the insole.