JPH01305902A - Sole and its manufacture - Google Patents

Abstract

PURPOSE:To increase wearproofness without hurting a floor, etc., by mixing ceramics particle with a material or one of same family of a material for a sole, forming a body and molding it in one piece with a material of a sole in severely abrasive right and left edges position of a heel of sole. CONSTITUTION:A molding 3, in which ceramics particle are dispersed, is buried in a heel portion 2 of a sole of a shoe 1 and formed in one piece. The molding 3 comprising of ceramics particle 5 which is dispersed and mixed in main material 4 comprising of heel portion 2 of a sole on the shoe 1. As a ceramic particle 5, a family of oxide and ceramics family of non-oxide such as silicon nitride, zirconia, alumina, cordierite, etc., are employed and in their form of massive, granulation, dust, superfine, etc., are used. Also, the molding 3 is preferably placed at a portion of a sole, where is specifically weighted and severely worn, and buried at a rear portion of the outside of the heel 2 exposing one of its sides.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to the structure of soles in shoes such as leather shoes, athletic shoes, and women's high heels, and to a method for manufacturing the same.

``Conventional technology'' Various types of shoes have been developed as products,
It is used. By the way, this type of shoe has the following:
Normally, part of the sole of the shoe, such as the heel, wears unevenly with use, and the weight is concentrated on this worn part, distorting the overall shape of the shoe and causing local deformation of the outer surface of the shoe. There was a problem with the storage.

In order to solve these problems, the present applicant and others first developed footwear with a ceramic-containing sole (patent application No. 183397-1987), which is made by dispersing ceramic sintered bodies in the sole of the footwear.
) was proposed.

"Problems to be Solved by the Invention" However, although the above-mentioned footwear in which ceramic sintered bodies are dispersed in the sole can solve the above-mentioned problems, it also has the following points to be improved. have.

■ If the ceramic sintered body is relatively large, it may damage floors, etc. when used.

■ If the floor surface is wet due to rain, etc., the Ceramix sintered body tends to slip on the wet surface, making it difficult to walk on.

■ When walking, the collision between the ceramic sintered body and the floor produces excessive noise.

■ If ceramic sintered bodies are densely arranged over the entire bottom, the entire bottom becomes hard and puts strain on the knees, heels, and joints when walking.

■ If a large amount of ceramic sintered body is mixed in, the overall cost will increase.

"Means for Solving the Problems" In the shoe sole according to claims 1 and 2 of the present invention, a part of the shoe sole is made by mixing ceramic particles into a material that is the same as or similar to the material that constitutes the shoe sole. The solution to the above problem was to construct a molded body made of

In addition, in the method for manufacturing a shoe sole according to claim 3 of the present invention, the sole is preferably placed in a position corresponding to the right and left ends of the heel of the shoe sole, which are subject to severe wear, in the shoe sole mold. The above method involves arranging the material and a molded body made by mixing ceramic particles into a material that is the same as or similar to the shoe sole material, and then manufacturing the shoe sole by integrally molding the shoe sole material and the molded body. It was used as a means to solve the problem.

Hereinafter, the shoe sole according to claim 1 of the present invention will be explained in detail.

FIG. 1 shows an example of a shoe sole according to the present invention, and reference numeral 1 in the figure indicates a shoe. Here, the shoes are not limited to the men's shoes shown in Figure 1, but include women's shoes (high heels, low heels),
It can also be applied to work shoes such as rain boots, athletic shoes, sports shoes, sandals, and jikatabi. A molded body 3 made of dispersed ceramic particles is integrally embedded in the heel portion 2 of the bottom of the shoe 1. This molded body 3 is shown in Fig. 2 (
a).

As shown in (b), ceramic particles 5 are mixed and dispersed in a main material 4 made of the same or similar material as the material constituting the sole or heel 2 of the shoe 1.

Here, as the constituent material of the sole or heel part 2 of the shoe 1, synthetic rubber, natural rubber, various synthetic resins, etc. are suitably used. Therefore, the main material of the molded body 3 is:
For example, if SBR is used in the heel part 2, SBR of the same composition
Or SBR with different compositions, or even SBR
Synthetic rubber made by blending this as a base material with other synthetic rubbers is used, and similarly when synthetic resin is used for the heel part 2, the same synthetic resin or the same type of synthetic rubber that is made of this synthetic resin as a base material is used. Synthetic resin is used.

Ceramic particles include silicon nitride, silicon carbide,
Particles of zirconia, alumina, aluminum nitride, cordierite, mica-based ceramics, and other oxide-based and non-oxide-based ceramics are used, and the particle size varies from lumps, granules, powders, and ultrafine powders. Use the stages as appropriate. In addition, such ceramic particles include high-purity products (purity of 99.99% or more) such as new ceramics, and medium-low products (purity of about 99%).
In addition to using low-grade products (purity of 60% or more), ceramic processing cutting waste that is discharged during ceramic processing is also used. In order to obtain such ceramic particles, a ceramic sintered body is formed by a pressureless sintering method, a pressure sintering method, or various other known sintering methods, and then,
In addition to producing it by pulverizing and adjusting it to a desired particle size, it is also possible to classify ceramic processing cutting waste and adjusting it to a desired particle size as described above.

Furthermore, the shape of the molded body 3 may be sheet-like, disk-like,
Further, it is preferable to have a columnar shape such as a circular, crescent, or polygonal cross section, but the shape is not limited to these, and other shapes may be used.

In addition, the molded body 3 is preferably placed in the part of the shoe sole where weight is particularly applied and wear is severe, for example, as shown in FIG.
As shown in FIGS. a) and 3(b) and FIGS. 3(a) and 3(b), it is buried in the outer rear portion of the heel portion 2 with one side thereof exposed.

In addition, the ceramic particles 5 are dispersed and mixed in the molded body 3 so that the outer surface (bottom surface) of the heel 2 is dense and the opposite side is sparse, as shown in FIG. Although it is preferable since it is advantageous in terms of cost, the ceramic particles 5 may be dispersed uniformly throughout, for example, or may be dispersed non-uniformly throughout.

In the shoe 1 with the sole configured as described above, the molded body 3 in which the ceramic particles 5 are dispersed is placed in the heel part 2, so that it does not damage the floor surface etc. during use and is durable. It has excellent abrasion resistance and can be used for a long period of time. In addition, since the molded body 3 is disposed not on the entire sole but on a part of the sole, there are no drawbacks such as excessive noise when walking or slippage when walking on a wet road surface during rain. Furthermore, since the main material 4 of the molded body 3 is the same as or similar to the material of the shoe sole, the molded body 3 can be well bonded and buried in the sole of the shoe. In addition, since the molded body 3 in which the ceramic particles 5... are dispersed is simply buried,
The cost is lower than when a large amount of sintered ceramics is mixed in, and the sole of the shoe as a whole does not become excessively hard, so it does not put strain on the knees, heels, joints, etc. when walking, making it easy to wear. It will be a good meal.

If the molded body 3 is placed in a part of the shoe sole where wear is particularly severe, for example, at the left and right ends of the heel, uneven wearing of the sole is suppressed and deformation of the shoe is prevented. This prevents inconveniences such as falling over.

In the above example, the molded body is placed at the heel, but it may be placed at other locations on the sole other than the heel, and the number of molded bodies is not limited to one, as shown in FIG. 3(b). Multiple pieces may be arranged as shown in .

Next, a method for manufacturing a shoe sole according to claim 2 of the present invention will be explained using an example of manufacturing a heel portion 2 of a shoe 1 shown in FIG. 1.

First, a molded body 3 is prepared by dispersing ceramic particles having a desired particle size in an appropriate state.

In order to obtain the molded body 3, a sheet 6 in which ceramic particles 5 are dispersed in the main material 4 is prepared in advance as shown in FIGS. A molded body 3 having a desired shape is manufactured by punching or extrusion molding or the like.

Next, formwork 7 (in this example, heel part 2) as shown in FIG.
A mold for molding is prepared, and the material constituting the heel portion 2 (sole material) and the molded body 3 are placed thereon.

Here, as the main material 4 of the molded body 3, for example, a material that is the same as or similar to the material constituting the heel portion 2 is selected in advance and used. When disposing the constituent material of the heel part 2 and the molded body 3 into the mold 7, first place the molded body 3 in a desired position, and then place the constituent material of the rear heel part 2 into the mold 7. Alternatively, the constituent material may be injected first, and then the molded body 3 may be placed.

Thereafter, as shown in FIG. 6, the sole material and the molded body are integrally molded to produce the heel portion 2.

According to such a manufacturing method, the main material 4 of the molded body 3 is made the same or similar to the constituent material of the heel part 2, so that the heel part 2
The molded body 3 is well bonded and embedded inside, and detachment of the molded body 3 is prevented. Furthermore, since manufacturing is simple and easy, manufacturing costs are extremely low.

"Effects of the Invention" As explained above, since the shoe soles according to claims 1 and 2 of the present invention have a molded body in which ceramic particles are dispersed, they do not damage the floor surface etc. when used. It has excellent abrasion resistance and can be used for a long time. It also has the disadvantages of making excessive noise when walking and being slippery when walking on wet roads during rain. be prevented. Furthermore, since the main material of the molded body is the same as or similar to the sole material, the molded body is well bonded and embedded in the sole of the shoe, so it can be used for a long period of time without any detachment of the molded body. becomes. In addition, since only a molded body in which ceramic particles are dispersed is embedded, the cost can be reduced compared to the case where a large amount of ceramic sintered body is mixed in, and the sole as a whole does not become excessively hard. The shoes are comfortable to wear and do not put any strain on the knees, heels, joints, etc. when walking.

Further, according to the method for manufacturing a shoe sole according to claim 3, since the main material of the molded body is the same as or similar to the constituent material of the sole, the molded body can be well bonded and buried in the sole of the shoe. Therefore, detachment of the molded body can be prevented and the sole can be used for a long period of time. Furthermore, since manufacturing is simple and easy, manufacturing costs can be extremely low.

[Brief explanation of the drawing]

Figures 1 to 6 are diagrams related to the present invention, and are
The figure is a schematic configuration diagram of a shoe equipped with the sole of the present invention, and FIG.
), (b) are enlarged sectional views of the heel of the shoe shown in Fig. 1, Figs. 3 (a) and (b) are bottom views showing the arrangement of the molded bodies, and Figs. FIG. 5 is a perspective view for explaining an example of a method for producing a molded body, and FIG. 6 is a schematic configuration diagram for explaining the production method according to claim 2 of the present invention. l...shoes, 2...heel, 3...
- Molded body, 4... Main material of the shaped body, 5... Ceramic particles, 7... Formwork.

Claims (3)

[Claims] (1) A shoe sole characterized in that a part of the sole is made of a molded body made by mixing ceramic particles into a material that is the same as or similar to the material that constitutes the shoe sole. (2) The sole according to claim (1), characterized in that the molded body is disposed at the left and right ends of the heel. (3) A shoe sole material and a molded body made of a material that is the same or similar to the shoe sole material mixed with ceramic particles are placed in a shoe sole mold, and then the shoe sole material and molded body are placed. A method for manufacturing a shoe sole, characterized by integrally molding the sole.