JP2000201703A - Sole structure - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To increase the variation of shoe sole design using a shank. SOLUTION: In a shoe sole structure, a shock absorbing portion made of foamed resin and cushioning an impact is provided from a forefoot portion 10 to a rear foot portion 11, and between the inside and outside of the foot in a middle foot portion 12 of the shock absorbing portion. Is provided with a through hole 13 penetrating vertically, a shank 2 is fixed to the upper surface of the buffer portion so as to close the through hole 13, and the shank 2 can be visually recognized from the ground plane through the through hole 13. To

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a sole, particularly a midsole and a shank.

[0002]

2. Description of the Related Art Athletic shoes equipped with a midsole are highly deformed at the stepping portion during walking or running, and are liable to cause fatigue to the user. In recent years, there has been a shoe in which the shank is fixed to the lower surface of the midsole to prevent the deformation (for example, see Japanese Patent Application Laid-Open No. 7-079804).

[0003] On the other hand, in recent years, shoes with high design properties have been demanded. Therefore, the shank is formed of a colorful resin to attract the attention of consumers and viewers.

[0004]

However, in the above-mentioned prior art, there is a limit in the variation of the design of the sole.
Accordingly, an object of the present invention is to increase the design variation of a shoe sole using a shank.

[0005]

In order to achieve the above object, a shoe sole structure according to the present invention is provided with a shock absorbing portion made of a foamed resin from the forefoot portion to the rear foot portion. A through-hole penetrating vertically is provided between the inside and the outside of the middle foot portion, and a shank is fixed to the upper surface of the buffer portion so as to close the through-hole, and the shank contacts through the through-hole. It is made visible from the ground side.

In the present invention, a shank is exposed from a window-like through hole on the back surface (ground contact surface) of the shoe sole. Therefore, a novel aesthetic that has not been seen before can be given to the viewer and the consumer.

[0007] In the present invention, the "shank" refers to a material that can substantially prevent the shoe sole from bending in the front-rear direction when walking or running due to the presence of the shank. Is generally JIS (D)
The hardness is set to about 50 to 70 degrees.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 and FIG.
It is the perspective view which looked at the midsole (buffer part) 1 from the back side and the front side. The midsole 1 is made of, for example, a resin foam such as EVA, and cushions an impact during walking or running. The midsole 1 is provided from the forefoot portion 10 to the hindfoot portion 11, and as shown in FIG. Is provided. As shown in FIG. 2, the shank 2 is adhered to the upper surface 14 of the midsole 1 so as to close the through hole 13 (FIG. 2B).

As shown in FIG. 1, the shank 2 is visible through the through hole 13 from the ground plane side. Therefore, a different aesthetic feeling from the conventional shank fixed to the grounding surface side is exhibited. In addition, the weight of the shoe sole can be reduced by the amount corresponding to the formation of the through holes 13.

As shown in FIG. 2, the shank 2 is provided over substantially the entire width in the width direction of the foot, and has a curved portion 15 whose inside is curved so as to roll up along the shape of the arch of the foot. By doing so, they support the arch of the foot. Therefore, unlike the case where the shank is provided on the grounding surface side, the fall of the arch can be prevented. As a result, foot fatigue can be suppressed.

In the present embodiment, a part of the shank 2 extends toward the vicinity of the MP joint of the foot. The M
The P joint refers to the joint B1 at the front of the metatarsal bone B in FIG.
The position of the MP joint is indicated by a two-dot chain line L in FIG. In this way, by extending the wide shank 2 provided on the upper surface 14 of the midsole 1 to the forefoot portion 10, the foot can be prevented from bending at the middle foot portion 12 (the foot is bent in the front-back direction). Since no force is inadvertently generated), fatigue of the foot can be suppressed.

In this embodiment, the cross section of the shank 2 (the cross section along the horizontal direction perpendicular to the front-rear direction) is a corrugated portion 20 at a portion corresponding to the through hole 13 at the center of the shank 2. Is formed to prevent the shank 2 from bending in the direction of the arrow A in FIG. That is, the shank 2 of FIG. 1 has a plurality of ridge lines 21 and valley lines 22 in the corrugated portion 20, and the ridge lines 21 and valley lines 22 are substantially parallel to each other and extend in the front-back direction of the foot. It is formed substantially parallel to the axis. This increases the strength of the shank 2 against bending in the front-rear direction and the like.

As shown in FIGS. 4 (a) and 4 (b), the shoe sole having the above-mentioned structure has a ground sole (outer sole) 3, an insole (inner sole) 4, an insole (insole) 5, an inner core 6, A part of the shoe is formed together with the upper 7.

In the present invention, as shown in FIG. 5, the cushioning member 8 may be filled on the corrugated portion 20 of the shank 2. In addition, the shank 2 may have a shape other than the waveform, for example, a pipe shape, a U-shaped cross section, or a plate shape. In addition, a pattern may be printed on the back of the shank to enhance the design.

The sole according to the present invention has a shank 2
The shank 2 and the midsole 1 may be molded at the same time to be integrated with each other.

[0016]

As described above, according to the present invention,
A through hole is formed in the midsole, and a shank is fixed to the upper surface of the midsole so that the shank can be seen from the through hole, thereby exhibiting a different aesthetic feeling from the conventional shank. Moreover, by forming the through holes in the midsole, the weight of the shoe sole can be reduced. Furthermore, since the shank is fixed to the upper surface of the midsole, the sole can be supported at a position close to the sole, so that a drop of the arch can be suppressed. Therefore, foot fatigue can be reduced.

In particular, if the shank is formed to be curved so as to wind up along the shape of the arch, the fall of the arch can be sufficiently prevented.

Further, if the shank is provided over substantially the entire width of the foot and extended to the vicinity of the MP joint, a force for bending the foot in the front-rear direction does not occur carelessly, so that fatigue of the foot can be reduced. obtain.

If the cross section of the shank is corrugated at the portion corresponding to the through hole, the bending strength of the shank at the portion is increased, so that the fatigue of the foot can be similarly reduced and the weight of the shank can be reduced. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a midsole showing an embodiment of the present invention as viewed from a ground contact surface, and a perspective view in which the midsole is cut off in a transverse section.

FIG. 2 is a perspective view of a midsole showing one embodiment of the present invention as viewed from above, and a perspective view of the midsole cut in a transverse cross section.

FIG. 3 is a side view showing a structure of a foot bone.

FIG. 4 is a cross-sectional view of the shoe.

FIG. 5 is a perspective view showing a midsole according to a modification in a partially broken manner.

[Explanation of symbols]

 1: Midsole 10: Forefoot 11: Rear foot 12: Midfoot 13: Through hole 2: Shank

Claims (5)

[Claims] 1. A shock-absorbing portion made of foamed resin is provided from the front foot portion to the rear foot portion, and a through-hole is provided between the inside and outside of the middle foot portion of the shock-absorbing portion. A shoe sole structure in which a shank is fixed to the upper surface of the buffer portion so as to close the through hole, and the shank can be viewed from the grounding surface side through the through hole. 2. The shoe according to claim 1, wherein the shank is provided on a foot portion and is curved so as to roll up along the shape of the foot arch, thereby supporting the foot arch. Bottom structure. 3. The shank according to claim 1, wherein the shank is provided over substantially the entire width in the width direction of the foot, and a part of the shank faces near the MP joint of the foot (joint in front of the metatarsal bone). The sole structure that extends. 4. The shank according to claim 1, wherein the shank has a portion corresponding to the through hole.
A shoe sole structure whose cross section is formed in a wavy shape. 5. The shoe sole structure according to claim 1, wherein the shank is formed of a resin having a JIS (D) hardness of 50 to 70 degrees.