JP2007268087A - Shoe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shoe capable of enhancing stability in running and also capable of relieving fatigue of a wearer by especially designing a structure itself in a midsole and an outsole so as to allow a twist rigidity in a front-foot pronating direction to be greater than that in a front-foot supinating direction. <P>SOLUTION: The shoe has a vamp, a sole 1 for receiving a foot of a wearer between the vamp and the sole, and a waveform 4 arranged on a metatarsus part D of the sole 1. The projection lines 41 and recess lines 42 of the waveform part are extended from an inner instep to an outer instep toward toes relative to an axis B of a shoe last. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shoe, and more particularly to a shoe characterized by torsional rigidity.

  Shoes used in various sports and the like generally have an upper part (cover part) including a part covering the back of the wearer's foot and a buttock, and a shoe bottom part. The shoe sole has a midsole and an outsole that is bonded to the lower surface of the shoe sole and is in direct contact with the road surface.

  And the shank part is formed in the arch part of the middle foot part, and by making the axis of pronation movement of the front foot part on the shoe sole, the deformation and twisting of the shoe sole is created around this rotation axis, and the front foot part is We are trying to provide shoes that can perform natural walking movements (pronation movements).

  However, in general, increasing the torsional rigidity of the shoes improves running stability, but the movement of the wearer's feet is hindered, so the wearer feels tired. Conversely, if the torsional rigidity is reduced, the wearer's feeling of fatigue is suppressed, but the running stability decreases. Therefore, it is necessary to optimize the torsional rigidity in order to suppress fatigue of the wearer while improving running stability.

  Here, paying attention to the directions of twisting (forefoot pronation direction and forefoot prolapse direction), the forefoot pronation direction (fixing the buttocks and the shoe sole of the forefoot toward the side away from the midline of the body) Direction torsional rigidity affects running stability, and torsional rigidity of the front foot (the direction in which the sole of the forefoot heads toward the midline of the body with the buttocks fixed) affects fatigue. To do. Therefore, while improving torsional rigidity in the forefoot pronation direction, while ensuring ease of twisting in the forefoot pronation direction, it suppresses wearer fatigue while improving the running stability of the shoes. Can do.

Accordingly, by increasing the torsional rigidity in the forefoot pronation direction to be greater than the torsional rigidity in the forefoot pronation direction, an attempt is made to suppress wearer fatigue while improving running stability. The invention has been made.
JP 2005-95388 A

Although the above invention is an excellent invention, when actually applied to shoes, it is necessary to stick a separate reinforcing belt to the midsole or outsole by bonding or the like.
However, when the shoe is worn and used for a long time, the elongated reinforcing portion is structurally subjected to repeated stress, and the reinforcing portion is easily peeled off. If the reinforcing part is peeled off from the midsole or outsole, the function and effect of the invention disclosed in Japanese Patent Application Laid-Open No. 2005-95388 will not be exhibited.

  Accordingly, the present invention increases the torsional rigidity in the forefoot pronation direction of Japanese Patent Application Laid-Open No. 2005-95388 so that the wearer feels fatigue while improving running stability. The purpose of restraint is realized by devising the structure of the midsole and outsole itself, and it is intended to provide shoes that are easy to make on the shoemaking.

  The invention of claim 1 includes an upper part, a shoe bottom part that receives a foot of a wearer between the upper part, and a corrugated shape at a middle foot part of the sole part, and a peak of the corrugated part The line and the valley line are shoes that extend from the inner side toward the outer side toward the toe with respect to the shoe-shaped center line.

According to the first aspect of the present invention, the torsional rigidity in the forefoot pronation direction is made larger than the torsional rigidity in the forefoot pronation direction, thereby suppressing fatigue of the wearer while improving running stability. It is intended to be realized by making the middle leg part of the bottom part into a corrugated shape.
The corrugated shape can be provided in advance in the mold when the midsole or outsole of the shoe is molded. Therefore, by using only the midsole or the outsole having the configuration of the present invention, the running stability can be improved and the wearer's feeling of fatigue can be suppressed, and the shoe making is easy.

  The invention according to claim 2 is the shoe according to claim 1, wherein a reinforcing plate is further adhered to the corrugated portion of the middle foot.

In the invention of claim 2, the reinforcing plate is stuck on the entire surface of the corrugated portion of the middle foot portion. Therefore, since the adhesion area can be increased as compared with Japanese Patent Application Laid-Open No. 2005-95388 in which a long and narrow reinforcing portion is attached, the reinforcing portion is difficult to peel off even when a repetitive stress is applied to the reinforcing plate.
In particular, if the reinforcing plate is placed on the corrugated portion provided in advance in the mold and the midsole is integrally formed, the problem of peeling is almost eliminated and shoes are easily manufactured.

  The invention according to claim 3 is the shoe according to claim 1, wherein an inclination angle of the ridge line and the valley line of the corrugated shape portion with respect to the shoe-shaped center line is 30 ° or more and 60 ° or less. It is.

Here, the shoe-shaped center line means a straight line that connects directly below the second metatarsal head of the wearer's foot and directly below the last part of the heel.
In the invention of claim 3, the torsional rigidity in the forefoot pronation direction can be efficiently improved by installing the reinforcing portion at the above angle.

  According to a fourth aspect of the present invention, there is provided a method according to any one of the first to third aspects, wherein the period of the peak line and the valley line of the corrugated portion is 2 to 3 wavelengths in the range from the inner shell side to the outer shell side. It is described shoes.

In the invention of claim 4, since the corrugated portion is provided from the inner shell side to the outer shell side, stress is not applied only to that portion like the conventional reinforcing portion, and the stress is dispersed. You can run smoothly.
The reason why the period was changed from 2 wavelengths to 3 wavelengths in the range from the inner side to the outer side is that the bending rigidity is low at less than 2 wavelengths and the shank effect is not exhibited. It is because it feels like pushing up on the sole of the foot. It is conceivable to reduce the height difference of the waves so as not to push up, but this increases the sinking of the midsole of the midfoot and loses stability.

As described above, according to the present invention, it is possible to suppress the wearer's feeling of fatigue while improving the running stability of shoes.
In addition, since the structure of the middle foot portion of the shoe sole exhibits the above-described effect, it is possible to prevent a reduction in the effect due to peeling of the reinforcing member, and the shoe sole can be easily manufactured.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
<First embodiment>
1 is a bottom view of the shoe of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 1 is a bottom view of the left foot, with the upper part of the drawing on the inner shell side and the lower part of the drawing on the outer shell side.
The shoe sole 1 of the shoe shown in FIG. 1 is classified into a front foot E, a middle foot D, and a rear foot C in the longitudinal direction. Here, the middle foot portion D means a range in which the distance from the rear end of the buttocks is not less than 0.2 times and not more than 0.65 times the total length (E + D + C) of the shoe 1, and the forefoot portion E is the middle foot portion. A range on the toe side from D, and a rear foot part C means a range on the heel side from the middle foot part D. In the present embodiment, the outsole 2 is provided on the front foot E and the rear foot C, and the midsole 3 is exposed on the bottom surface in the middle foot D between them.

As shown in FIG. 2, the midsole 3 of the midfoot part D has a corrugated shape 4 in cross section, and the peak line 41 and the valley line 42 of the corrugated part are on the toe with respect to the shoe center line B. A certain angle α extends from the inner side toward the outer side.
Here, the shoe-shaped center line B means a straight line connecting directly below the second metatarsal head of the wearer's foot and directly below the last part of the heel.

In the present invention, since it is configured as described above, the corrugated portion itself has a certain rigidity. In addition, the direction having the rigidity is the direction of the mountain line 41 and the valley line 42, that is, the direction of a constant angle α from the inner shell side toward the outer shell side toward the toe with respect to the shoe center line B.
On the other hand, in the direction perpendicular to the mountain line 41 and the valley line 42, that is, in the direction perpendicular to the shoe-shaped center line B toward the toe toward the toe, from the inner angle side to the outer angle side α. On the other hand, the rigidity becomes weak and it becomes easy to bend.

As a result, the torsional rigidity in the forefoot pronation direction is high, and the torsional rigidity in the forefoot pronation direction is low.
As described above, it is possible to suppress the wearer's feeling of fatigue while improving running stability.

In addition, it is good for the inclination angle with respect to the shoe-shaped centerline B of the mountain line 41 and the valley line 42 of a waveform shape part to be 30 degrees or more and 60 degrees or less.
When the angle is set, the torsional rigidity in the forefoot pronation direction can be improved efficiently.

The period of the peak line 41 and the valley line 42 of the waveform shape portion is 2 to 3 wavelengths in the range from the inner side to the outer side.
The reason why the period is changed from 2 wavelengths to 3 wavelengths in the range from the inner side to the outer side is that the bending rigidity is low at less than 2 wavelengths and the shank effect is not exhibited. Because it feels pushed up on the sole of the foot. It is conceivable to reduce the height difference of the waves so as not to feel the push-up, but this increases the sinking of the midsole of the midfoot part, and the stability is lost.

In the case of the two wavelengths, the height difference between the peak line 41 and the valley line 42 is optimally 10 mm, and in the case of three wavelengths, 5 mm is optimal.
Therefore, the height difference between the mountain line 41 and the valley line 42 is preferably in the range of 5 to 10 mm.

  Furthermore, the corrugated shape 4 can be provided in advance in the mold when the midsole or outsole of the shoe is molded. Therefore, it is easy to make shoes.

<Second embodiment>
As shown in FIG. 3, a reinforcing plate 5 having rigidity higher than that of the midsole can be attached to the corrugated portion of the middle foot portion D.
Nylon, TPU, solid EVA, solid rubber, woven fabric, etc. can be used as the material of the reinforcing plate 5.

By using the reinforcing plate 5, the rigidity of the corrugated portion can be further increased.
In addition, since the reinforcing plate 5 is attached to the entire surface of the corrugated portion of the middle foot portion, it is difficult to peel even if the reinforcing plate 5 is subjected to repeated stress.
In particular, if the midsole is integrally formed by placing a reinforcing plate on the corrugated portion provided in advance in the mold, the problem of peeling is almost eliminated, and shoe making becomes easy.

<Third embodiment>
In the 1st, 2nd Example, it comprised so that the waveform shape 4 of the midfoot part D could be seen from a shoe sole. In this way, not only the function can be understood from the outside, but also a new impression can be given to the consumer.

However, in the third embodiment of the present invention shown in FIG. 4, the midfoot part D is composed of two members, midsole 3 and 6, and the interface between the two is a corrugated shape 4. ing. Therefore, it is unclear whether or not the waveform shape 4 exists at a glance from the bottom.
Even with this configuration, the torsional rigidity in the forefoot pronation direction is high and the torsional rigidity in the forefoot pronation direction can be reduced, so that the wearer's feeling of fatigue is suppressed while improving running stability. be able to.

Furthermore, as shown in FIG. 5, a reinforcing plate 5 having a corrugated shape 4 can be interposed at the interface between the midsole 3 and 6.
Also, the rigidity of the midsole 3 and 6 can be changed.

It is a bottom view of shoes which carried out the present invention. It is the sectional view on the AA line of the shoes of FIG. It is AA sectional view taken on the line which shows another Example. It is AA sectional view taken on the line which shows another Example. It is AA sectional view taken on the line which shows another Example.

Explanation of symbols

1 Sole 2 Outsole 3 Midsole 4 Waveform 41 Mountain Line 42 Valley Line 5 Reinforcement Plate 6 Midsole

Claims (4)

The upper part,
A shoe sole for receiving a wearer's foot between the upper and the upper;
A corrugated shape is provided in the middle foot portion of the shoe sole,
The peak line and the valley line of the corrugated shape part are shoes that extend from the inner side toward the outer side toward the toe with respect to the shoe-shaped center line.   The shoe according to claim 1, further comprising a reinforcing plate attached to the corrugated portion of the middle foot portion.   The shoe according to claim 1, wherein an inclination angle of the ridge line and the valley line of the corrugated shape portion with respect to the shoe-shaped center line is 30 ° or more and 60 ° or less. The shoe according to any one of claims 1 to 3, wherein a period of the mountain line and the valley line of the corrugated shape portion is 2 wavelengths to 3 wavelengths in a range from the inner shell side to the outer shell side.

Images