JPH09322803A - Footwear having outsole formed to give inside aeration of shoes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the wearer comfortable to wear by providing an outsole with a cellular structure therein whose cells are open to the inside of a piece of footwear and forming a plurality of through-holes in a midsole for establishing communication of the cells of the outsole with the inside of the footwear. SOLUTION: A midsole 4 having an edge is arranged between an outsole 2 and an inner lining 3. The outsole 2 has therein a cellular structure, such as a honeycomb structure. The midsole 4 has a plurality of holes for forming communication of the outsole 2 with the inside of the footwear. This structure allows the deformation of the outsole during the walking to produce a pumping action for forming circulation of air in the footwear. In this way, self-aeration is provided and the footwear makes the wearer more comfortable and is particularly useful for good wearing.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to footwear having a plastic outsole and upper.

[0002]

2. Description of the Related Art In recent years,
Footwear made of plastic whose outsole is press-molded or injection-molded, for example, footwear having an outsole such as foamed polyurethane fused to the upper, which is often made of a synthetic material, is widely used. Also known in the art are footwear of the type described above having a liner of liquid water impermeable and water vapor permeable, such as expanded porous polytetrafluoroethylene, provided therein.

Synthetic materials used to make outsoles and other parts of footwear offer the full benefits of being economical, lightweight, and durable. For these reasons, the adoption of such materials has become commonplace.
However, despite the advantages mentioned above, most synthetic materials suffer from the drawbacks that they are completely impermeable, which impedes the proper release of water vapor from the foot and gives the user unfavorable results. Have.

This impermeability undermines the advantages gained from the use of water vapor permeable linings. It is an object of the present invention to provide footwear in which the above drawbacks have been eliminated.

[0005]

According to the present invention, footwear having an instep, an outsole, and a midsole is an inner part of an outsole having a cellular structure of, for example, a honeycomb type molded structure. And having a perforated midsole that allows air to flow from the outsole into the footwear.

According to this structure, the deformation of the cells of the outsole during walking causes a pumping action that causes air circulation between the outsole and the inside of the footwear. This contributes to the fact that recirculation and self-ventilation are triggered in the areas of the footwear where such a function is required.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the outsole has a cellular structure of, for example, a honeycomb structure in its inner portion, and the midsole has a plurality of holes for forming communication between the outsole and the inside of the footwear. Have. According to this construction, the deformation of the outsole during walking results in the generation of pumping action which creates an air circulation in the shoe. In this way self-ventilation is provided, increasing the comfort of the user and making the footwear particularly useful and comfortable.

Referring to the drawings, one footwear according to the present invention is
It comprises an upper 1 having its lower part attached to an outsole, generally designated 2, which is made of synthetic material, for example an injection molded material such as polyurethane foam. The inner side of the footwear is lined with a layer 3 of impermeable material that is capable of wicking water vapor, ie is permeable to moisture, which can be, inter alia, a layer of expanded porous polytetrafluoroethylene.

Disposed between the outsole 2 and the inner lining 3 is a midsole 4 having an edge, the edge being on one side to the outsole or instep by the adhesive layer labeled 5 and 6, respectively, and to the other. Side is attached to the inner liner. The inner portion of the outsole is cellular, in other words shaped to have a plurality of blind holes or cells 7 that open to the inside of the footwear. For example, the outsole can have a honeycomb structure inside. The midsole 4 can be made of felt or other suitable material and has a plurality of through holes 8 for forming communication between the cells of the outsole structure and the interior of the footwear. The hole 8 preferably has an upper edge 9 (see FIG. 2), which is rounded to prevent damage to the inner lining 3 during movement of the shoe.

And finally, one or two layers 10 of, for example, non-woven fabric can be provided to protect the midsole 4. In use, the deformation exerted on the outsole during walking causes the cells 7 to collapse. That is,
A part of the air existing in the cell is discharged upward. A pumping action is formed inside the footwear, causing air circulation. This air tends to flow from the outsole cells through the midsole holes 8 and escape outwards along the walls, and vice versa. In this way, self-venting is actually done, which contributes to the recirculation of air inside the footwear, especially below the zone of the sole of the foot. This has a beneficial effect on the user and almost completely eliminates the drawbacks associated with footwear where the breathability is lost.

Although the inner portion of the outsole may maintain a cell-like structure, the shape of the cell is not limited to the hexagonal shape of the honeycomb structure and should be within the scope of the technical idea of the present invention. For example, it may be a circle or another one. It will also be appreciated that the dimensions and materials used may vary depending on the particular application.

[Brief description of drawings]

1 schematically shows a longitudinal section of footwear according to the invention, FIG.

FIG. 2 shows details of FIG.

[Explanation of Codes] 1 ... Instep 2 ... Outsole 3 ... Breathable Material 4 ... Midsole 5 ... Adhesive 6 ... Adhesive 7 ... Cell 8 ... Through Hole

Claims (4)

[Claims] 1. An instep, an outsole made of a plastic material adhered to the instep, and a midsole disposed inside the insole in contact with the outsole, the outsole being open to the inside of the footwear. Of the type having its inner portion comprising a cellular structure with cells, the midsole of which has a plurality of through holes for establishing communication between the cells of the outsole and the interior of the footwear. footwear. 2. Footwear according to claim 1, characterized in that a lining of liquid water impermeable and water vapor permeable material is provided inside. 3. Footwear according to claim 2, wherein the impermeable and wicking material is porous polytetrafluoroethylene. 4. The footwear according to claim 1, 2 or 3, wherein the inner portion of the outsole has a honeycomb structure.