JPH0777561B2 - Shoe sole - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the improvement of the soles of various shoes such as running shoes for sports such as running and jogging, and especially those requiring flexibility.

[0002]

2. Description of the Related Art The flexibility of the sole is a problem required for most shoes as well as sports shoes used exclusively for competition. Particularly, the flexibility of the sole is required at the front stepped portion as shown in FIG. 6, and if the flexibility of this portion is impaired, the light movement of the front, rear, left and right of the foot is hindered. However, there is a defect that this causes an extra load on the foot and causes premature fatigue to the shoe wearer. In addition, slippage of the heels is caused, and further, injuries such as plantar fasciitis are caused.

By the way, the original purpose of shoe soles is to alleviate impact and prevent slippage. Naturally, a major point of this problem is the aspect of the ground contact surface sole (outer sole) or the midsole [middle sole] that constitutes the shoe sole.
Especially in sports shoes used for various sports, the thickness of the sole, the depth of the groove, and the design pattern of the sole greatly affect impact mitigation and anti-slip depending on the type of exercise, which requires a great deal of energy for research and development. Is currently being spent.

Therefore, when imparting flexibility to the shoe sole, it is of course necessary to have a structure that does not impair the shock absorbing function and anti-slip function of the shoe sole described above. A configuration that does not adversely affect In consideration of such a situation, in the conventional product, the groove formed simply for improving the flexibility is arranged so as to be orthogonal to the longitudinal direction of the shoe at the stepped portion that properly receives the landing pressure of the shoe wearer in the vertical direction. Since the wall thickness is scraped off by a groove that has been drilled in order to impart flexibility, there is a defect that the shock absorbing function is reduced by the amount of scraping off the wall thickness. In particular, in the case of so-called cup-sole type shoe soles that are wound so as to surround the peripheral edge for the purpose of strengthening the holding property and stability of the stepped portion of the shoe sole, a three-dimensional curved surface is formed on the wound sole portion. In addition, there is a defect that a strong resistance to bending acts, the flexibility of the shoe sole main body is hindered, and a sufficient effect cannot be obtained.

[0005]

Therefore, the present invention overcomes the above-mentioned defects of the conventional shoe sole having flexibility, does not impair the shock absorbing function and anti-slip function of the shoe sole, and has the original purpose. An object of the present invention is to provide a shoe sole capable of effectively exerting a certain flexibility.

[0006]

In order to solve the above problems, the inventors of the present invention have made earnest studies, and as a result, have provided an invention having the following structure. That is, according to the present invention, in a shoe sole main body in which a part or all of an outer sole is wound up along a bottom peripheral side edge and a peripheral edge portion that covers a side edge of a midsole is formed, at least both left and right sides of a front stepping portion. A V-shape or a U-shape inwardly of the shoe sole as a starting point of the ridge line 6 of the peripheral edge portion in a direction orthogonal to the longitudinal direction of the shoe sole body, and at the side surface of the sole as well. A shoe sole having a novel configuration in which a notched groove having a depth reaching one or a plurality of midsole 2 which appears in an inverted V shape or an inverted U shape upwardly is formed as a starting point of a ridge line 6 of a peripheral edge portion. Is.

[0007]

Therefore, according to the present invention, one or a plurality of notched grooves extending from the outer sole to the midsole are provided at the peripheral edge portion which tends to hinder the flexibility of the shoe sole body. The bending resistance that occurs in the three-dimensional curved surface of the part is eliminated in advance, and the flexibility of the shoe sole required for all sports is fully demonstrated without impairing the original shock absorbing function and anti-slip function of the shoe sole. It has the effect of being able to.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the present invention relates to a shoe sole main body in which a part or all of an outer sole 1 is wound up along a bottom peripheral side edge and a peripheral edge portion 3 covering a side end edge 4 of a midsole 2 is formed. , V-shaped or U-shaped inward of the shoe sole, starting from the ridge line 6 of the peripheral edge portion 3 in the direction orthogonal to the longitudinal direction of the shoe sole body at least on both left and right sides of the front stepping portion. None, and a notch groove 5 having a depth reaching one or a plurality of midsoles 2 which are shown in an inverted V shape or an inverted U shape on the side surface of the sole.

At this time, the notch groove 5 formed in the peripheral edge portion 2 of the shoe sole main body is along the left and right sides of the front stepping portion, which is required to have the most flexibility in the movement of the foot of the shoe wearer. Is formed. In FIG. 1, one notch groove 5 is provided on the inner side of the shoe and two notch grooves 5 are provided on the outer side of the shoe. However, the number of the notch grooves 5 is not limited to this and may be appropriately formed. The notch groove 5 is formed in a V shape inward of the shoe sole starting from the ridge line 6 of the peripheral edge portion 3 on the ground contact surface side of the shoe sole body, and on the shoe sole side surface 5 of the peripheral edge portion 3 as well. The ridge line 6 is used as a starting point and is provided above the shoe sole in an inverted V shape. The same effect can be obtained when the notch groove 5 has a V shape as well as a U shape.

FIGS. 1 to 3 explain the mode of the notch groove 5 formed in the front step portion. Here, the size of the notch groove 5 is the size of the peripheral edge portion 3 on the ground contact surface side. Ridge line 6
The opening width L in the horizontal direction starting from is set to 30 mm, the opening width E in the vertical direction is set to 10 mm, and the opening width H on the side surface of the shoe sole is formed to 10 mm. Regarding the depth of the notch groove 5, as shown in FIG. 4, when the notch groove 5 is drilled in a range that stops only on the outer bottom 1 and does not cut the midsole 2,
The outer bottom 1 has a width equal to the thickness of the outer bottom 1. Here, the depth R of the cutout groove 5 is set to about 5 mm. FIG. 5 shows a modified embodiment, in which the notch groove 5 penetrates the outer sole 1 and reaches the midsole 2. Here, the notch groove 5 is drilled to a depth of about 10 mm. is doing.

If the notch groove 5 is formed in this way, the flexibility of the shoe sole body can be expected up to the midsole 2 and a greater effect can be expected. Therefore, the size and shape of the cutout groove 5 should be such that the flexibility of the shoe sole main body can be fully utilized and that the impact cushioning function and anti-slip function on the ground contact surface side are not adversely affected. Desirably, the opening width L in the lateral direction starting from the ridge line 6 of the peripheral edge portion 3 is used.
Is 20 mm to 50 mm, and the vertical opening width E is 5
mm to 20 mm and the opening width H on the side of the sole is 5
mm to 20 mm, depth R is 5 mm to 10 mm
It is desirable to form in the range.

At this time, the outer sole 1 is made of natural rubber, synthetic rubber, urethane or plastic as a sole member having excellent durability and non-slip of the sole.
Elastomers such as butadiene rubber or foams thereof are used, but in general, compared with the midsole formed of foams such as sponge, the thickness is reduced in order to suppress weight. .

On the other hand, the midsole 2 is a sole material having excellent shock absorbing properties for shoes, and examples thereof include natural rubber, styrene-butadiene rubber, isoprene rubber, acrylonitrile-butadiene rubber, polyurethane, and elastomer such as high styrene range. Mixtures of two or more thereof are used. Therefore, the shoe sole material, hardness, and thickness used for the outer sole 1 and the midsole 2 are appropriately selected according to the purpose of wearing the shoe. Further, the notch groove 5 formed in the peripheral edge portion 3 formed by rolling up the outer bottom 1 is not limited to the front stepped portion, and may be formed in any place where the peripheral edge portion 3 is formed. .

[0014]

Therefore, according to the present invention, one or a plurality of notched grooves extending from the outer sole to the midsole are provided especially at the peripheral edge portion which tends to hinder the flexibility of the shoe sole body. Therefore, it is possible to eliminate the occurrence of bending resistance generated on the three-dimensional curved surface of the peripheral edge part, remove the extra load on the foot, and promote the light movement of the foot in the front, back, left and right. Injuries such as plantar fasciitis can be prevented.
Further, since the notch groove is provided at the peripheral edge portion, the flexibility of the shoe sole required for all sports can be fully exhibited without impairing the original impact cushioning function and anti-slip function of the shoe sole.

[Brief description of drawings]

FIG. 1 is a partial perspective view showing a bottom surface side of a shoe sole of the present invention.

FIG. 2 is a schematic bottom view showing the main part of the shoe sole of the present invention.

FIG. 3 is a schematic side view showing the main part of the shoe sole of the present invention.

FIG. 4 is a schematic sectional view showing a main part of the shoe sole of the present invention.

FIG. 5 is a schematic sectional view of a main part of a modified shoe sole.

FIG. 6 is an explanatory diagram showing changes in the sole of the shoe when the shoe is worn.

[Explanation of symbols]

 1 Outsole 2 Midsole 3 Edge edge 4 Side edge of midsole 5 Notch groove 6 Ridge line

Claims (3)

[Claims] 1. A shoe sole main body having a peripheral edge portion 3 covering a side end edge 4 of a midsole 2 wound up by winding up a part or the whole of the outer sole 1 along a bottom peripheral side edge, and at least a front stepping V-shaped or U-shaped toward the inner side of the shoe sole from the ridge line 6 of the peripheral edge portion 3 in the direction orthogonal to the longitudinal direction of the sole body from the left and right sides of the sole, and on the side surface of the sole. Similarly, a shoe sole characterized in that a notch groove 5 having a depth reaching one or a plurality of midsoles 2 which are shown in an inverted V shape or an inverted U shape is formed upward from the ridge line 6 as a starting point. 2. The cutout groove 5 has a lateral opening width L of 20 mm to 50 mm from the ridge line 6 of the peripheral edge portion 3 on the ground contact surface side, and a vertical opening width E of 5 m.
m to 20 mm, the opening width H on the side of the sole is 5 m
2. The shoe sole according to claim 1, wherein the shoe sole has a depth R of 5 mm to 10 mm and a depth of 5 to 10 mm. 3. The shoe sole according to claim 1, wherein the notch groove 5 penetrates the outer sole 1 and is formed in the midsole 2.