JPH05253003A - Air-passable shoes - Google Patents

Abstract

PURPOSE:To provide shoes having excellent air passability even under high humidity and excellent durability and cushion property. CONSTITUTION:An air-passable non-woven fabric 1 having fibers 11, 11... partially bonded to each other through rubber latex is exposed to the side face of the sole 2 of a shoe. A notch 41 is formed approximately in the center of a treading part embedded in the sole 2. An intermediate sole 4 having a flexible, elastic and air-passable foamed body 3 interposed in the notch 41 is located on the upper surface of the sole. The foamed body 3 overlaid on the upper surface of the air-passable non-woven fabric 1 is bulged into the shoe through an air-passable overlay 5 near the center of the treading part.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to breathable shoes.

[0002]

2. Description of the Related Art Conventionally, according to Japanese Examined Patent Publication No. 38-21285, a breathable sole in which a normal open-cell rubber foam is buried in the sole by exposing its side surface to the side surface of the sole. Proposed. This sole was intended to discharge the air inside the shoe from the inside of the shoe to the side of the sole through the open-celled rubber foam by combining with the ventilation material or the ventilation structure installed inside the shoe. It is a thing.

However, when the open-celled rubber foam is worn for a long time and the humidity inside the shoe rises, or when the humidity of the outside air such as rain increases, the moisture condenses and the open-cells block. However, there is a drawback that the air permeability is significantly reduced. Further, the usual open-cell rubber foam has a rough foam structure and weak mechanical strength such as tensile strength, tear strength, and bending resistance, and has a problem in durability as a constituent material of a shoe sole.

[0004]

DISCLOSURE OF THE INVENTION The present invention is intended to provide a breathable shoe which has excellent breathability even under high humidity and which is excellent in durability.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the following, the present invention will be described with reference to the drawings. Is exposed on the side surface of the shoe sole 2 and embedded in the shoe sole 2, and a cutout portion 41 is formed on the upper surface of the shoe sole 2 at the center side of the stepping portion, and the cutout portion 41 has breathable soft elastic foam. The breathable nonwoven fabric 1 and the breathable soft elastic foam 3 are positioned on the insole 4 with the body 3 interposed therebetween, and the breathable soft elastic foam 3 is placed through the breathable overlay 5. It is an object of the invention to provide a breathable shoe which is characterized in that the shoe is bulged in the center of the stepping portion.

In the present invention, the breathable nonwoven fabric 1 is made of polyamide fiber, polyester ester fiber, polyacrylic fiber,
Not only synthetic fibers such as polyvinyl alcohol fiber, polyurethane fiber and polyorifin fiber, but also regenerated fibers such as blended fiber, viscose fiber and acetate fiber,
Natural rubber latex, styrene, which is produced by a wet or dry method or a direct method using a natural fiber of collagen fiber formed of cotton, hemp, leather or the like or a mixed fiber thereof. Adhesion ratio between fibers constituting a nonwoven fabric of rubber latex such as butadiene rubber latex, nitrile rubber latex, chloroprene rubber latex, and acrylic rubber latex is 30 to 60.
It is used after being impregnated so as to have a content of 0.1%, squeezed, heated and dried, and then cut into an appropriate shape. In the present invention, if the adhesion ratio between the fibers of the fibers 11.11 forming the non-woven fabric 1 is less than that, the mechanical strength such as tensile strength, tear strength, and bending resistance is reduced, and the adhesion ratio is more than that. In that case, there is a drawback that the air permeability is lowered.

In the present invention, the breathable non-woven fabric 1 is exposed and embedded in the side surface of the shoe sole, but the non-woven fabric 1 is entirely laminated in the shoe sole to expose the side surface entirely in the side surface of the sole. When you wear it, it is partially embedded in the sole from the tread part of the sole to the toe part, corresponding to the foot part of the foot with a large amount of sweat You may expose the side surface to the side surface of the shoe sole from a part to a toe part. In this case, if the shoe sole 2 has a heel sole 21, the breathable non-woven fabric 1 is extended to the stepped portion, and the side surface 12 of the breathable nonwoven fabric 1 is the side surface of the shoe sole 2. You can leave it exposed. In the present invention, if a groove is formed in the lateral direction on the lower surface of the breathable nonwoven fabric 1, bending of the shoe sole is promoted by the groove when worn, and the groove also functions as a ventilation groove. Ventilation is promoted.

In the present invention, the insole 4 is made of leather or leather.
It is composed of a board, a fiber board, etc., and has a central side of the stepping portion, specifically, a portion corresponding to the heads of the second to third metatarsal bones as an edge side, A substantially semi-elliptical or trapezoidal notch 41 having a base corresponding to the bottom of the foot bone is formed. The soft elastic foam 3 interposed in the notch 41 is made of a normal breathable foam such as polyurethane foam, latex foam, and open-cell rubber foam. And an overlay 5 laminated on the upper surface of the insole 4.
Is made of a flexible material such as cloth, leather having vent holes 51.51 ..., Synthetic resin sheet, or the like.

In the present invention, as the breathable soft elastic foam 3, a polyurethane foam sheet having a thickness larger than that of the insole main body 4 is punched and cut according to the shape of the notch 41, and this is used. Is set on the lower surface of the upholstery 5 and set in the notch 41, and when the shoe sole 2 is attached to the covering 6, a polyurethane foam is used through the breathable nonwoven fabric 1 embedded in the shoe sole 2. If the formed soft elastic foam 3 is in a compressed state and the shoe sole 2 is attached to the armor cover 6, if the completed shoe is released from the shoe mold after the shoe is assembled on the shoe mold and completed. Due to the impact resilience of the soft elastic foam 3 made of polyurethane foam, the soft elastic foam 3 can be easily swollen into the shoe through the upper layer 5, which is convenient.

[0010]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, when weight pressure is applied to the stepping part of the sole of the foot during the walking / running process during wearing, the center of the stepping part in the shoe is swollen. The ejected elastic foam 3 is compressed, and the air interposed in the elastic foam 3 is forcibly discharged to the outside of the shoe through the breathable non-woven fabric 1, so that the stepping part on the sole of the foot during the walking and running process. When the load of the body weight pressure is released, the elastic foam body 3 swells while inhaling the air in the shoe through the upper layer 5 by the repulsive elasticity of the elastic foam body 3. Therefore, the breathability and cushioning property are good. Further, since the breathable non-woven fabric 1 is made by partially bonding and solidifying the interfiber gaps with rubber latex, the tensile strength, tear strength, mechanical strength such as bending resistance, flexibility, and durability of the shoe sole are improved. It can be significantly enhanced. Further, even when the humidity of the outside air such as rain is rising, the cushioning action of the elastic foam body 3 and the nonwoven fabric 1 impregnated with rubber latex are heated and compressed to be solidified. Moisture is discharged to the side of the sole of the shoe by the capillary phenomenon, so that the dew condensation does not impair the air permeability.

[Brief description of drawings]

FIG. 1 is a partially cutaway sketch of a shoe of the present invention.

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

FIG. 3 is a sectional view taken along line BB in FIG.

[Explanation of symbols]

1. Breathable nonwoven fabric 11 ... Fiber 2. Shoe sole 3. Soft elastic foam 4. Insole 41. Notch 5. Upholstery

Claims (1)

[Claims] 1. A breathable non-woven fabric 1 impregnated with a rubber latex, which is heated and compressed to partially bond the fibers 11.11 ... Is exposed in the side surface of the sole 2 and embedded in the sole 2. Then, on the upper surface of the shoe sole 2, a notch portion 41 is formed in the center side of the stepping portion, and the insole 4 having the breathable soft elastic foam 3 interposed in the notch portion 41 is used as the breathable nonwoven fabric 1. It is characterized in that breathable soft elastic foams 3 are placed one on top of the other, and the breathable soft elastic foams 3 are swelled into the shoe at the center side of the tread portion via a breathable overlay 5. Breathable shoes to do.