JPS6031525Y2 - shoe insole - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an insole for shoes that is highly heat-retaining and has little wet feeling due to undesirable evaporation and moisture during sweating.

Conventionally, insole materials used for shoe insoles include cotton fabric with paper inside, leather, felt, or a single piece of plastic molded material with dotted holes.

With these structures, insensible perspiration in the early stages of wear or when sweat is low is absorbed by the surface of the socks and insole, but when sweat increases, the inside of the insole becomes wet, causing a wet or sticky feeling on the feet. In addition, since moisture is continuously present between the foot and the insole, the thermal conductivity of this area increases, resulting in a cold sensation on the feet.

The present invention is an improvement on the conventional shoe insole with a relatively uniform cross-sectional structure, and consists of a laminated fabric with unevenly distributed water absorption in the cross-sectional direction and a normal water absorbent with a relatively uniform cross-section. The object of the present invention is to obtain an insole for shoes that greatly reduces discomfort such as a wet feeling and a sticky feeling on the feet by combining the material with a rubber structure.

In order to achieve this objective, the present invention has the following configuration.

That is, the present invention consists of a shape-retaining body in the form of a shoe insole having a large number of openings, a highly water-absorbing filler housed inside the shape-retaining body, and a fabric covering the outside of the shape-retaining body. The fabric has a laminated structure of layers with water absorption levels varying stepwise in the cross-sectional direction from the surface layer with low water absorption to the back layer with high water absorption, and This is an insole for shoes, characterized in that the back surface is integrally joined with the filling material.

In other words, the present invention is a fabric with a double-layered structure or a laminated structure with more layers, and the water absorbency of each layer constituting the fabric is higher in the middle layer than the surface layer, and in the back layer than the middle layer. This is an insole for shoes that is composed of a filling material with a high moisture content that is in full or partial contact with a reinforcing material that maintains the bulkiness of the filling material.

The present invention will be explained in detail below.

The present invention and the like have already been proposed in Utility Model Application No. 157215/1983 (No. 74083/1983) regarding the fabric used in the present invention.

In other words, between each layer constituting the fabric, there is at least one of the following three elements: porosity of the tissue, surface area of the constituent fibers, and contact angle between the constituent fiber material and water in the cross-sectional direction from one surface of the fabric to the other. By providing a stepwise order (performance gradient) for one element, this fabric has given a certain directionality to the wetting performance in the cross-sectional direction of the fabric.

The present invention is a shoe insole that combines such a fabric with a normal insole.

Here, the present invention will be specifically explained with reference to the drawings.

Figure 1 shows the insole of the shoe, and Figure 2 shows A- in Figure 1.
It is an A-line sectional view.

The fabric 1 covers the whole body, and inside thereof there is a shape support body 2 made of plastic which maintains the shape of the insole even when compressed by the foot and is provided with a large number of openings 3. A large filling material 4 is built into the interior.

FIG. 3 is a partially enlarged cross-sectional sketch showing the tissue structure of the fabric 1.

In Fig. 3, 5 is the structure forming the outermost layer of the fabric (hereinafter referred to as the surface layer), 6 is the structure forming the intermediate layer (hereinafter referred to as the intermediate layer), and 7 is the structure forming the innermost layer (hereinafter referred to as the back surface layer). 8.9.10 layers), each of these layers being organized with multifilament fibers or spun yarn wefts 8.9.10;
and 6 are bonded fibers 11, and 6 and 7 are also properly bonded and integrated with 12.

13, 14.15 are the warp threads of each layer, each measuring 5°6.7.

Figure 3 shows the case of a woven fabric, so there is a division into weft and warp yarns, but in the case of a knitted fabric, there is no such division, but the structure is the same.

The structure of the stratum corneum of the fabric is such that the surface layer 5 is made of ester or nylon, which has a good contact angle with ice, and the same denier with a small surface area or the yarn with the lowest number of filaments available, and the middle layer 6 is is made of the same material as surface area 5, but uses the same denier with a larger surface area or the same thread with the largest number of filaments.

The back layer 7 is made of a material such as cotton or rayon, which has a small contact angle with water, and has a large thread count with a small surface area.

That is, when floating liquid adheres to the surface layer 5 of the fabric in contact with the foot due to perspiration, the adhered water reaches the intermediate layer 6 due to relatively weak hydrophilicity, capillary action, and contact action between the fabric and the foot.

The intermediate layer 6 is more easily wetted than the surface layer 5 due to hydrophilicity and capillary phenomenon, and the surface layer 5 is wetted more easily while expanding the wetted area.
As a result, the water content of the intermediate layer 6 becomes higher than that of the surface layer 5.

A similar phenomenon occurs between the back layer 7 and the intermediate layer 6 due to the difference in wetting strength, and eventually most of the floating liquid in the front layer 5 transfers to the back layer 7.

The floating liquid that has reached the back layer 7 passes through the back layer 7 and the large number of openings 3 in the shape support 2 of the plastic object and comes into contact with the highly absorbent filling 4 built into the shape support 2. Therefore, it moves in the direction of the filling 4.

The filler 4 is made of a highly absorbent material such as cotton or rayon in the form of fabric, nonwoven fabric, or cotton.

Therefore, unless the water content of the back layer 7 of the fabric and the large amount of filler 4 built into the plastic molded support 2 is saturated, sweat from the feet will be unevenly distributed in areas other than the surface layer 5 of the fabric. The foot in contact with the surface layer 5 does not feel steamy or sticky, and since the water content of the surface layer 5 is low, heat retention is maintained well, resulting in a comfortable shoe insole.

Next, the present invention will be explained with reference to Examples, but the present invention is not limited thereto.

Example 1 A triple-edged fabric was woven by a conventional method using nylon long fibers 70 denier/36 filament for the surface layer, acrylic 60S/1 for the middle layer, and cotton thread 6O3/2 for the back layer.

The weaving density for each layer is 90 warps/in and 60 wefts.
It was from a book/in.

This fabric was scoured, dyed and finished according to conventional methods.

On the other hand, using polyethylene resin, an insole for a shoe with a height of 5 cm, a hollow interior, and a large number of openings around the entire periphery was molded by injection molding.

Next, strips of fabric refined by a conventional method are stuffed into the cavity of the finished product using an air gun until a portion of the cotton fabric comes out from the opening.

This finished product was wrapped in the triple-woven fabric to make a shoe insole.

In order to test the water absorbency of this insole, when a drop of water was dropped on one point on the surface of the triple-layered fabric, after a few seconds the water droplet was absorbed into the inside of the insole without spreading to the fabric surface.
It was absorbed immediately as well.

When the insole of the present invention was installed in shoes and worn to examine its practical performance, it was found that the feet did not feel wet during walking in daily life, as well as during exercise accompanied by sweating, and the feet did not feel sticky even after stopping exercise. There was almost no feeling of cold.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway diagram showing an example of the insole of the present invention, and Fig. 2 is a sectional view taken along the line A-A in Fig. 1, where 1 is a fabric and 2 is a plastic item. shaped body, 3
is an opening, and 4 is a filling. FIG. 3 is a partially enlarged cross-sectional sketch showing the structure of the fabric 1 in FIGS. 1 and 2, with reference numeral 5 indicating a surface layer, 6 indicating an intermediate layer, and 7 indicating a back layer. 8, 9, 10 are the wefts of the constituent fibers of each layer of 5, 6, and 7, 11 is the interlayer bonding fiber of 5 and 6, and 12 is the weft of the fibers 6 and 7.
13°, 14°, and 15 indicate the warps of the constituent fibers of 5°, 6°, and 7, respectively.

Claims (1)

[Scope of utility model registration request] The inside of a shoe is composed of a shape-retaining body in the form of an insole having a large number of openings, a highly water-absorbing filling housed inside the shape-retaining body, and a fabric covering the outside of the shape-retaining body. The fabric has a laminated structure of layers whose water absorbency varies stepwise in the cross-sectional direction from a surface layer with low water absorption to a back layer with high water absorption, and the back surface of the fabric is covered with the filler. An insole for shoes characterized by being integrally joined so as to be in contact with the insole.