JPH09238704A - Shoes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve bending rigidity and strength and to improve the walking quality of shoes by forming the cross sections of shanks to an arch shape. SOLUTION: The shank 2 is arranged around an arch area 4 in a longitudinal direction and is arranged from the front end of a heel 5 toward the rear end of a treading bottom 6. The shank is arranged in the central part of the area in a transverse direction. The shape of the shank 2 is formed to an arch shape in the shape of its cross section and is straight in the longitudinal direction. In some cases, the shape in the longitudinal direction section is formed to the arch shape as well. Thermosetting resins reinforced by compounding fibers, such as carbon fibers, aramid fibers and glass fibers, therewith, metals, such as aluminum, and others are used for the material of the shank. These materials are used by laminating the materials or mixing the materials with another materials.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to shoes.

[0002]

2. Description of the Related Art Walking shoes and golf shoes used for relatively long-distance walking are
The thick-sole type is preferred over the thin-sole type such as competitive running shoes. The reason is that the bending or bending of the arch area is suppressed and the walking property is improved. In order to more positively reduce such bending or bending, a core material called a shank is embedded in the arch area of the sole of the shoe. Metal plates are often used. The shape of these shanks is a vertically long flat plate.

[0003]

Since the conventional shank is a flat plate, it is disadvantageous in both bending rigidity and strength. Although it is possible to solve these problems by increasing the thickness in order to improve both physical properties, it is not preferable for shoes because the weight increases due to the increase in thickness. In addition, the increased weight impairs walking. It is an object of the invention of the present application to provide a shoe having excellent walking characteristics that eliminates the above problems.

[0004]

The present invention relates to a shoe of a type in which a shank is embedded mainly in the arch area, and the cross section of the shank has an arch-shaped three-dimensional shape.

[0005]

According to the invention of this application, since the shank has an arch-shaped cross-sectional shape, compared with the conventional flat plate shank,
Since the bending rigidity and strength are remarkably improved, it is possible to reduce the weight, and thus the walking property is remarkably improved.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, description will be given with reference to the drawings. 1 and 2 show a shoe 1 in which a shank 2 is embedded in a shoe sole 3, FIG. 1 is a longitudinal sectional view, and FIG. 2 is a plan view. As is clear from FIGS. 1 and 2, the shank 2 is arranged in the longitudinal direction centering on the arch area 4, and is arranged from the front end of the heel 5 to the rear end of the step portion 6, It is arranged at the center in the width direction.

The shank 2 of the invention of the present application preferably has an arch-shaped cross section and is straight in the vertical direction as shown in FIG. As shown in FIG. 4, the shape of the vertical cross section may also be arched.

The material of the shank is preferably a thermosetting resin reinforced by blending fibers such as carbon fiber, aramid fiber and glass fiber, other ordinary thermosetting resin, metal such as aluminum, wood, etc., In addition, these materials are preferably laminated or mixed with other materials, but carbon fiber,
The thermosetting resin reinforced by blending fibers such as aramid fiber and glass fiber is most preferable.

In order to reduce the weight of the shoe, as shown in FIG. 3, a through hole 7 can be appropriately provided. It is preferable that the recessed hole 7 is arranged mainly in an area where the burden on the shank when walking is relatively small. The shape of the hole is preferably circular or elliptical.

The ratio of the height h to the width w of the arch-shaped cross section is preferably in the range of 5 to 25%, most preferably around 11%.

The thickness of the shank depends on the material,
In the case of a thermosetting resin containing fibers, the thickness t is 1.
A range of 5 to 4.0 mm is preferable, and a thickness of about 2 mm is most preferable. The thickness t made of this resin material is 2 mm, and the ratio (h / w) of the height (h) and the width (w) of the shank.
The x100) shank of 11% is equivalent in performance to the thickness of 5 mm of the conventional flat plate shank, so that the shank of the invention of the present application can achieve the same effect with a thickness of half or less. The sex can be improved.

The plane shape of the shank 2 may be a rectangular shape as shown in FIG. 2 or a bent shape similar to the bent shape of the shoe sole from the arch region 4 to the tread portion 6. Further, it is possible to form an elliptical shape having a wide central portion in the longitudinal direction, and further to form an hourglass shape having a constricted central portion in the longitudinal direction opposite to this. This hourglass shape is effective in that the four corners of the shank serve as supporting points for the load.

The ratio of the shank width w to the width W of the most constricted part of the arch of the shoe sole as shown in FIG.
A range of 70% is preferred, with about 50% being especially preferred.

The shank 2 may be directly embedded in the shoe sole 3, but as shown in FIG. 5, it may be covered with a resin 8, particularly a transparent resin, and embedded in the lower surface of the shoe sole. Since the arrangement of the shank 2 can be visually observed from the outside, the shank 2 coated with the transparent resin can exhibit its functionality.

In the example of FIG. 5, the shoe sole 3 in the arch area is shown.
FIG. 3 is a cross-sectional view of the shank 2 covered with the transparent resin 8.
However, it is integrated with the rubber outsole 9 that contacts the ground on the left and right, and the upper 10 of the leather material is joined to the outsole 9 in an overlapping manner. 1 shows a structure in which a member 11 is arranged.

[0016]

According to the invention of this application, since the shank has an arch-shaped cross section, the bending rigidity and strength are significantly improved as compared with the conventional shank made of a flat plate. Therefore, it is possible to reduce the weight, which significantly improves the walkability of the shoe.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a shoe sole of a shoe in which a shank is arranged.

FIG. 2 is a plan view of a shoe sole of a shoe in which a shank is arranged.

FIG. 3 is a perspective view of a shank.

FIG. 4 is another perspective view of the shank.

FIG. 5 is a transverse cross-sectional view of the sole of the shoe in which the shank is arranged.

[Explanation of symbols]

 1 shoe 2 shank 3 shoe sole 4 arch area 5 heel 6 tread 7 recessed hole 8 resin 9 outsole 10 upper 11 upper component w shank width W shank neck width h shank arch height t Shank thickness

Claims (1)

[Claims] 1. A shoe in which a shank is embedded around the arch area, wherein the cross section of the shank has an arch-shaped three-dimensional shape.