JPH0443048Y2 - - Google Patents

Description

[Detailed explanation of the idea]

<Industrial Application Field> The present invention relates to athletic shoes used for competitions and other athletic shoes that are equipped with a heat insulating member in the bottom. <Prior art> Conventional shoes, especially athletic shoes, mainly have ventilation holes and/or ventilation channels formed in the upper part or bottom of the athletic shoes in order to prevent heat and stuffiness from exerting on the feet of the shoe wearer. Many so-called ventilated shoes have been proposed. However, the above-mentioned ventilated shoes and the like are often at risk of being clogged with the vents, vents and/or vent passages due to intrusion of dust or the like, or being damaged by repeated pressure. In addition, if the ventilation holes and/or ventilation paths are to be molded completely and firmly, the hardness and weight of the sole will increase, and the flexibility of the sole, which is an essential requirement for shoes and athletic shoes, will increase. There were also defects that impaired the lightness of the shoe as a whole. <Problems to be Solved by the Present Invention> The purpose of the present invention is not only to solve the above-mentioned problems with conventional ventilated shoes, but also to allow the wearer to wear them on roads or all-weather pavement, especially in the summer. 50℃ or more from competition courts and grounds made of wood.
The bottom part attempts to block the conduction of heat due to high-temperature radiant heat that can reach up to 60°C and frictional heat from the floor. <Means for Solving the Problems> In order to achieve the above object, the present invention comprises a shoe cover 9, an insole 7, an insole 10, a sole 4, etc. Sole 7 and insole 1
A thermoplastic resin coating 3 containing one or more metal powders on one or both surfaces of the sheet 2, which is made by impregnating ceramic fibers with a thermoplastic resin solution and heat-reacting the same, in the bottom of the sheet 2, as shown in FIG.
The object of the present invention is to provide athletic shoes in which a heat insulating member 1 is formed by intervening connection. That is, the heat insulating member 1, which is the main part of the present invention, includes a sheet 2 formed by impregnating ceramic fibers with extremely low thermal conductivity with a polyurethane resin liquid and heat-forming the same.
The film 3, which is a molded mixture of metal powder with good heat reflectivity and a two-component polyurethane resin solution, which covers the sheet 2, attempts to block the penetration of heat mainly through the bottom surface of the sole. It is something. <Example> The embodiments of the athletic shoes according to the present invention will be described below with reference to the drawings. As shown in the schematic cross-sectional view of FIG. 1, the athletic shoe of the present invention has a heat insulating member 1 between the midsole 7 and the sole 4 from which the entire lower edge of the shoe cover 9 is suspended. are interposed. At this time, the lace cover 9 may be any known lace cover material such as natural leather, synthetic leather, or woven or knitted fabric of natural fibers or synthetic fibers, but preferably one with good air circulation. Similarly, since the insole 7 comes into contact with the sole of the foot, it may be made of a known insole material such as a rubber-like elastic material, pressboard with good water permeability, or nonwoven fabric. The heat insulating member 1 is formed by forming a sheet 2 by impregnating a non-woven fabric made of ceramic fiber with extremely low thermal conductivity (0.05 to 0.20 kcal/mhr°C) with a polyurethane resin solution and subjecting it to a heat reaction. Metal powder with low thermal conductivity such as stainless steel powder (approx. 0.0389 cal/cmSec℃) or aluminum powder (approx.
0.53cal/cmSec°C) was mixed into a two-component polyurethane resin solution to form coating 3.
to form. As shown in FIG. 1, in the athletic shoe of the present invention, the heat insulating member 1 is sandwiched between the sole 4 and the midsole 7 such that the lower surface 5 of the coating 3 is in contact with the upper surface of the sole 4. be done. The sole 4 may be made of any known sole material, but in this case, it is made of, for example, transparent synthetic resin or synthetic rubber, preferably transparent polyurethane resin. At this time, since the coating 3 of the heat insulating member 1 is formed by mixing stainless steel powder with aluminum powder and a two-component polyurethane resin solution, the bottom side of the sole 4 has a shiny silver heat insulating coating. The member 1 can be exposed. At this time, the adhesive for adhesively bonding the sole 4 and the heat insulating member 1 may be a polyurethane resin-based adhesive, preferably a transparent adhesive. In addition, in the athletic shoes shown in FIGS. 2 and 3, the heat insulating member 1 has a flat surface 5 of the coating 3 on the midsole 7.
The upper surface 5' of the coating 3 is in contact with the upper surface of the insole 1
It is interposed and sandwiched between the insole 7 and the insole 10 so as to be in contact with the lower surface of the shoe. At this time, since there is no need for the heat insulating member 1 to be exposed to the outside, a material having coatings 3, 3 made by mixing only relatively dull stainless steel powder in a two-component urethane resin solution is used. There is. To explain in detail an example of processing the heat insulating member 1, which is the main part of the athletic shoe of the present invention, a nonwoven sheet 1 is formed by impregnating ceramic fibers in a polyurethane resin solution and subjecting them to a heating reaction. Next, a mixture of stainless steel powder alone or stainless steel powder and aluminum powder mixed at a ratio of 9:1 in a two-component reaction type polyurethane resin solution is applied to one or both surfaces of the sheet 1. The layer is heat-reacted at about 60° C. for about 3 minutes, and the surface of the coated layer is processed into a smooth one by roll compression or press pressing. Next, comparative data regarding the thermal conductivity of the sample of the heat insulating member A according to the present invention and the heat pipe (hereinafter referred to as blank) are as shown in Tables 1 and 2 below.

【table】

[Table] <Operations and Effects> The athletic shoes of the present invention are worn by the wearer, and the wearer can wear them on the indoor floor, on the outdoor ground, on concrete, asphalt, or on the ground, depending on the purpose of the competition or practice. Or, when competing, practicing, or exercising on a ground or court made of all-weather synthetic rubber or synthetic resin paving material, the frictional heat generated between the soles of the athletic shoes and the surface of the court, etc. or from the sun. The sole 4 of the shoe comes into contact with the surface of the paving material, which is charged with radiant heat (the temperature of the air that the wearer senses: for example, in the summer it reaches 38 degrees Celsius, but is much higher than this). The conduction of heat from the sole 4 of the shoe is carried out by the heat insulating member 1 on the sole 4 or on the midsole 7, for example.
The aluminum powder contained in the coating 3 on the surface of the aluminum powder reflects heat, and the aluminum powder and/or the stainless steel powder have a low thermal conductivity property that suppresses the initial heat conduction. Furthermore, due to the extremely low thermal conductivity due to the ceramic fibers in the non-woven sheet 2 inside the heat insulating member 1, and/or furthermore, the stainless steel powder etc. contained in the coating 3 on the side of the insole 7 or insole 10. was able to block the conduction of heat. In addition, in the athletic shoes of the present invention, on the sole 4 (between the midsole 7), which is made of polyurethane rubber or the like and has high transparency,
The heat insulating member 1 equipped with a coating 3 containing aluminum powder can prevent heat conduction due to the strong heat reflection properties of the aluminum powder in the coating 3, and improve the appearance of athletic shoes due to the shine caused by the aluminum powder. It is possible to significantly improve the appearance and the commercial value of the product.

[Brief explanation of the drawing]

1 and 2 are cross-sectional schematic illustrations of the athletic shoe of the present invention. FIG. 3 is a partially enlarged schematic cross-sectional view of a heat insulating member which is a main part of the athletic shoe of the present invention. Reference numbers in the drawings: 1...Insulating member, 2...Non-woven sheet, 3...Coating, 4...Sole, 7...Insole, 9...Fabric cover, 10...Insole.

Claims (1)

[Claims for Utility Model Registration] 1. A thermoplastic resin coating containing one or more mixed metal powders on one or both surfaces of the sheet 2, which is made by impregnating ceramic fibers with a thermoplastic resin solution and subjecting them to a heating reaction. 1. Athletic shoes characterized in that a heat insulating member 1 formed by a heat insulating member 3 is interposed in the bottom part. 2. The athletic shoe according to claim 1, wherein the heat insulating member 1 is sandwiched between the sole 4 and the midsole 7. 3. The athletic shoe according to claim 1, wherein the heat insulating member 1 is sandwiched between an insole 7 and an insole 10.