JP2001057901A - Out-sole divided structure of shoe sole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a user less fatigued during being tired in walking, or the like, while allowing to exert motor functions and also to enhance conservation of shape by improving flexibility of the shoe sole laminated with a mid-sole and an out-sole. SOLUTION: The out-sole 4 (4a, 4b, 4c) laminated on the back of the mid-sole 3 is divided into three parts: a tiptoe out-sole 4a, trampling out-sole 4b disposed at the trampling part and an out-sole body 4c disposed at the foot-arch and heel part. A gap (x) is formed between the tiptoe out-sole 4a and trampling out-sole 4b while a gap (y) between the trampling out-sole 4b and the out-sole body 4c. Further, recessed grooves 3x and 3y are formed on the mid-sole 3 at portions corresponding to the gaps (x) and (y), respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sole structure excellent in flexibility.

[0002]

2. Description of the Related Art Conventionally, in a handmade shoe in which a shoe sole is stuck to an upper, for example, E having good cushioning property
A shoe sole called a compression sole in which a midsole such as a VA material and an outsole such as a rubber material having good abrasion resistance are bonded by a press may be used, and such a compression sole is used for processing. Flatten the joint surface of the midsole and outsole for ease, etc.
The entire surface is often bonded from the toe to the heel.

However, in the case of the above-mentioned laminated structure of the sole, the laminated structure of the midsole and the outsole increases the thickness, lowers the flexibility, makes it difficult to walk in walking and the like, and in particular, reduces the movement function of the foot. In the case of shoes or the like that are desired to be exhibited, the flexibility is lacking.
A technique such as No. 6 is known. In this technique, the outsole of the toe portion has a single-layer structure made of a soft material, and portions other than the toe portion have a two-layer structure of a hard material and a soft material.
The flexibility of the toe is enhanced.

[0004]

However, in the case of the above-mentioned technique, the entire toe portion becomes flexible, and the load on the toes and the like becomes too great. Sometimes or when a large force is applied instantaneously to the toe, there is also a problem of shape retention, such as increased fatigue of the finger and easy deformation of the shoe sole.

In view of the above, the present invention provides a shoe sole structure in which a midsole and an outsole are laminated to improve the flexibility of the shoe sole to make it easy to walk when walking, and to exert a sufficient exercise function and the like. An object of the present invention is to provide a shoe sole structure having good shape retention.

[0006]

In order to achieve the above object, the present invention relates to a shoe sole structure in which a midsole and an outsole are laminated, wherein the outsole is formed between a toe portion and a tread portion, and as a tread portion. It is divided into three in the front-rear direction so that a gap is formed between the stepped portion and the non-stepped portion.

[0007] Here, the toe portion mainly refers to a portion corresponding to the sole of the finger, and the tread portion refers to a base portion of the toe of the foot to which a stepping force acts mainly during walking or the like (near the metatarsal head). )
The area between the toe and the stepping part corresponds to the vicinity of the joint at the boundary between the toe bone and the metatarsal bone, but at least a gap of the outsole is provided between the toe and the stepping part. In this case, the gap portion has only the thickness of the midsole and is easily bent, and the portion matches the bent portion of the foot when walking or the like, so that walking or the like can be smoothly performed.

[0008] In addition, if a gap of the outsole is formed between the stepped portion and the non-stepped portion in addition to this portion, the flexibility of the shoe sole can be further improved, and the bent portion can be reduced. Because it does not concentrate on the various places, stress distribution at the time of bending is achieved,
The durability of the shoe sole is improved. Incidentally, the non-step portion mainly refers to a portion corresponding to the arch of the sole.

According to the second aspect of the present invention, a concave groove is formed in a portion of the back surface of the midsole corresponding to the gap of the outsole.

[0010] Here, the back surface of the midsole refers to the joint surface to which the outsole is joined. If a concave groove is provided in the midsole corresponding to the gap portion of the outsole, the bent portion of the midsole can be bent. Properties can be further improved.
In addition, such a concave groove determines its shape, depth, and the like so as to obtain a desired flexibility in consideration of, for example, the properties and thickness of the material of the midsole. For this reason, it is preferable that the groove be rounded without forming a straight-line intersection.

[0011]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an explanatory view showing an example of a shoe employing the shoe sole structure according to the present invention, FIG. 2 is a view of the shoe sole viewed from below, (a) is a bottom view, and (b) is an arrangement of outsole. FIG. 3 is a side view of the shoe sole, FIG. 4 is a sectional view taken along line AA of FIG. 2, and FIG.
FIG. 4 is a cross-sectional view taken along line B.

The sole structure according to the present invention makes it easy to walk when walking by increasing the flexibility of the sole in the sole in which the midsole and the outsole are laminated, and the exercise function can be sufficiently exhibited. In addition, the shape retention is also improved, and the present invention is applied to a shoe sole 2 of a shoe 1 as shown in FIG.

The sole 2 of the embodiment has a structure called a compression sole in which a midsole 3 such as an EVA material and an outsole 4 such as a rubber material are laminated and integrated by pressing. 2 is attached to the upper 5.

As shown in FIGS. 2 to 5, the midsole 3 is formed so as to include all parts of the sole from the toe to the heel, and the peripheral portion is thicker than the intermediate portion. The midsole 3 has an outsole 4 laminated to the back side of the midsole 3 and a toe outsole 4a, a treading outsole 4b, and a main body outsole 4c. The toe outsole 4a is provided mainly at a portion corresponding to the sole of the toe, and the treading outsole 4b is provided mainly at a portion corresponding to a portion kicked out at the base of the finger when walking or the like. The outsole 4c is disposed mainly in a portion corresponding to the unheeled portion to the heel portion.

A gap x is formed between the divided toe outsole 4a and the stepping outsole 4b,
A gap y is also formed between the treading outsole 4b and the main body outsole 4c. Corresponding to the gaps x and y, the grooves 3x, 3
The groove shape of these concave grooves 3x, 3y (the cross-sectional shape cut in a direction perpendicular to the groove) is rounded without any linear intersection.

For this reason, the thickness of the entire shoe sole 2 is reduced by the gap x and the concave portion 3x between the toe portion and the stepping portion, and the flexibility is enhanced. Also, the thickness is reduced by the gap y and the concave portion 3y, and the flexibility is enhanced. And by increasing the flexibility between the toe and the tread as described above, the bending point of the foot and the bending point of the shoe sole coincide with each other during walking, etc., so that it is less likely to be tired, and the exercise performance can be sufficiently exhibited. As a result, since the flexibility between the stepped portion and the non-stepped portion is good, the stress at the time of bending is dispersed without being concentrated at one place, and the durability is also good. Further, since the concave grooves 3x and 3y are rounded, stress is less likely to be concentrated at the time of bending, thereby further improving the durability. Furthermore, since the toe itself has relatively high rigidity, protection of a fingertip or the like is achieved, and shape retention is also good.

Incidentally, in the embodiment, the toe outsole 4
Regarding the gap x between a and the tread outsole 4b,
The center part is widened and the end parts are narrowed to enhance the design effect, and at the same time, the color of the treading outsole 4b is different from the color of the toe outsole 4a and the body outsole 4c, and the bottom of the sole 2 is designed. To improve the performance.

In the embodiment, the average thickness m near the center of the midsole 3 made of the EVA material is set to about 7 mm, and the depth n of the concave grooves 3x and 3y is set to about 2.5 mm. mn) / m is about 0.65, and the outsole 4a, 4
The average thickness of b and 4c is approximately 4 mm. The distance between the front grooves 3x is about 13 mm for the wide part and about 5 mm for the narrow part.
Are set to a uniform interval of about 5 mm.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, the material and the like of the midsole 3 and the outsole 4 are arbitrary, and the shoe sole structure is not limited to the handmade shoe 1. Further, the dimensions of the concave grooves 3x and 3y and the dimensions of the gaps x and y are also arbitrary.

[0020]

As described above, the shoe sole structure according to the present invention has the following features.
The outsole laminated to the midsole is divided into three parts in the front-rear direction so that a gap is formed between the toe portion and the tread portion and between the tread portion and the non-tread portion. Only the sole has a thickness that makes it easier to bend, and the same part matches the bent part of the foot when walking, so that walking etc. can be performed smoothly, and at the same time, flexibility is formed by forming multiple gaps It is possible to perform better, and to achieve stress distribution at the time of bending. Further, it is preferable to form a concave groove in a portion corresponding to the gap of the outsole on the back surface of the midsole, since the flexibility of the portion can be further improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a shoe employing a shoe sole structure according to the present invention.

FIG. 2 is a view of the shoe sole viewed from below, where (a) is a bottom view,
(B) is an explanatory view for clarifying an arrangement portion of the outsole and the like.

FIG. 3 is a side view of a shoe sole.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a sectional view taken along line BB of FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Shoes, 2 ... Sole, 3 ... Midsole, 3x, 3y ... Groove, 4 ... Outsole, 4a ... Toe outsole, 4b
… Stepping part outsole, 4c… body outsole,
x, y ... gaps.

Claims (2)

[Claims] 1. A shoe sole structure in which a midsole and an outsole are laminated, wherein the outsole has a gap formed between a toe portion and a tread portion and between a tread portion and a non-step portion. The outsole split type sole structure is divided into three parts in the front-rear direction. 2. The outsole split type shoe sole structure according to claim 1, wherein a concave groove is formed in a portion corresponding to a gap of the outsole on a back surface of the midsole. Outsole split type sole structure.