JP2010178770A - Sole and shoe using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sole for imparting a repulsive force without impairing flexibility in the planter part of the sole, and to provide a shoe which has the sole and is suitable for running of children. <P>SOLUTION: The sole has a recessed groove provided in the width direction along the bending line on the tread face side of the planter bending part, wherein a belt-like reinforcing material is imbedded so as to cross the recessed groove. The belt-like reinforcing material is not adhered to the sole material in the recessed groove but is exposed, and parts other than the recessed groove portion stuck to the sole. The belt-like reinforcing material has a hardness of JIS-A 30-50, has a rebound resilience of 50-70% at 0-40°C measured by JIS K6255, Lupke type rebound resilience tester, and is composed of a soft elastic body having no lowering of repetitive stress. As for the shoe mounted with this sole, the belt-like reinforcing material serves as a spring along the bending line and supports running. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

[Technical Field] The present invention relates to a shoe sole structure that aims to allow children to run fast, promotes flexural flexibility of a shoe sole stepping portion, and exhibits a repulsive force when kicking out.

Patent Document 1 and Patent Document 2 describe a shoe sole in which a foamed midsole is laminated on an upper part of an outsole to promote natural movement of a foot during walking and running, and to prevent a toe from falling due to bending fatigue of the toe part. A plurality of longitudinal grooves from the tread portion to the toe portion of the laminated surface of the foamed midsole, and a short-side groove in which the front end portions and the rear end portions of the longitudinal grooves are respectively connected. There is disclosed a shoe sole in which a fitting groove is formed and a rubber-like elastic piece corresponding to the fitting groove is fitted and fixed.
In Patent Document 3 and Patent Document 4, when running shoes or walking shoes are used, in order to increase the repulsive force in the stepping portion of the shoe sole, a shoe sole in which a plate made of a highly elastic resin is embedded. Is disclosed.

Japanese Patent Laid-Open No. 05-199907 JP-A-2005-473 JP 2002-360305 A JP 2008-48893 A

In the shoe sole structure of Patent Document 1 or Patent Document 2, since the rubber-like elastic piece is substantially embedded between the outsole and the midsole, the elastic effect of the rubber-like elastic piece cannot be sufficiently exhibited. Had the disadvantages.
In addition, in the shoe sole structure of Patent Document 3 and Patent Document 4, because the plate is made of a highly elastic resin, even if a repulsive force can be applied, the bending resistance also increases and the bending resistance increases. , It puts a burden on the feet.
For this reason, athletes with high exercise ability can bend the plate with their own muscle strength and move forward with the repulsive force to return, but a significant burden on the lower limb muscles for general users, especially children. For this reason, there is a problem that it is impossible to cope with the hardness of the plate to be inserted, and it is necessary to restrict wearing.
The shoe sole of the present invention focuses on such problems, and has a sole structure that increases the repulsive force of the shoe sole without a sense of incongruity and supports kicking after bending when children are running or walking. Provide shoes.

The shoe sole of the present invention is a shoe sole in which a concave groove along a bending line is provided in a stepped portion on the ground contact surface side of the shoe sole, and a band-shaped reinforcing material is disposed so as to intersect with the concave groove. The reinforcing material does not adhere to the shoe sole material in the recessed groove portion, and its entire circumference is exposed, and is embedded in a part or all of the shoe sole at a location excluding the recessed groove, and is fixed to the shoe sole. It is characterized by.
The bending line of the stepping portion referred to here is a line connecting points where the shoe sole is most easily bent, and is a single line provided in the width direction of the shoe sole.
The concave groove is characterized in that it is provided along the single bending line.

In the shoe sole of the present invention, a plurality of strip-shaped reinforcing materials are arranged so as to intersect the concave groove, and in the concave groove, a gap is provided on the lower surface of the strip-shaped reinforcing material, and bending resistance It is characterized by freely expanding and contracting without obstructing.
It is preferable that the strip-shaped reinforcing material is arranged so as to intersect at substantially right angles to the concave groove.

The band-shaped reinforcing material used for the shoe sole of the present invention has a hardness of JIS-A 30 to 50, a rebound resilience of 50 to 70% at 0 to 40 ° C. as measured by JIS K 6255 Rüpke, and a repetitive stress. It is a soft elastic body that does not decrease.
A general vulcanized rubber used for a shoe sole has a rebound resilience of 30 to 40% measured by JIS K 6255 Lupke method. From 0 ° C. to 40 ° C., it is 50 to 70%, and the repeated stress does not decrease.
Specifically, the band-shaped reinforcing material is selected from vulcanized rubber, silicon rubber, and TPU mainly composed of highly elastic natural rubber.

Further, it is important that the band-shaped reinforcing material is not fixed to the shoe sole main body in the concave groove portion, and it is preferable that there is a gap between the band-shaped reinforcing material and the concave groove. Thereby, since the strip-shaped reinforcing material is a soft elastic body, the degree of freedom at the time of bending in the recessed groove portion is ensured, and the restoring property of the reinforcing material at the time of bending can be fully exhibited.
A plurality of strip-shaped reinforcements are arranged independently on the foot of the shoe sole, and in order to increase the kicking force during running, the rebound resilience of individual strip-shaped reinforcements depends on the position of the shoe sole inside and outside. It is possible to appropriately change the value of the rate.

The shoe sole of the present invention is a shoe sole in which an outer sole and an intermediate sole are laminated, and the concave groove is provided along the bending line in the stepping portion of the intermediate sole on the ground surface side, and intersects with the concave groove. The band-shaped reinforcing material is embedded in the intermediate bottom, and the band-shaped reinforcing material is embedded and fixed between the outer bottom and the intermediate bottom in a portion other than the concave groove, and the outer bottom is It is characterized in that it is notched around the concave groove, and the band-shaped reinforcing material and the intermediate bottom are exposed.

Also for the shoe sole in which the outer bottom and the intermediate bottom are laminated, it is preferable to provide a gap between the belt-shaped reinforcing material and the concave groove. Specifically, a fitting portion for embedding a band-shaped reinforcing material is formed in the intermediate bottom, and a longitudinal groove parallel to the reinforcing material deeper than the fitting portion is provided, thereby providing a gap between the concave groove and the groove. A larger gap can be formed.
As a result, the belt-shaped reinforcing material can freely expand and contract without interfering with bending resistance.
For the intermediate bottom, a foam such as RB sponge, EVA sponge, and polyurethane foam is used.

The shoe sole of the present invention is a foamed bottom consisting of one layer, and a concave groove is provided in a stepping portion on the ground contact surface side of the shoe sole, and a belt-like reinforcing material is embedded so as to intersect with the concave groove. The strip-shaped reinforcing material is exposed in the groove portion.
A foam is preferable for the foam bottom composed of one layer, and rubber sponge, polyurethane foam, and RB sponge are used.

In the shoe sole according to the present invention, it is preferable that both ends of the reinforcing member have a shape that widens the bonding area of the end of the reinforcing member in order to secure a fixing force with the shoe sole.
At the end of the band-shaped reinforcing material, the shape may be a hook shape or a T shape. Moreover, it is good to buff the surface of a reinforcing material and ensure the adhesive force with an adhesive agent.

In addition, if the parts of the reinforcing material and the parts of the outer sole are press vulcanized simultaneously in an unvulcanized state, the process of forming the shoe sole can be reduced and the adhesive force between the reinforcing material and the shoe sole can be further strengthened. .

The shoe of the present invention is characterized in that a shoe upper is fixed to an upper part of a shoe sole.
As a method for producing the shoe of the present invention, either an adhesive type or an injection type may be used. In the adhesive type, the shoe upper is suspended in the last, and the lower surface of the shoe upper and the shoe sole are bonded together using an adhesive.
Further, in the injection type, a bag-shaped shoe upper is stitched to the last by sewing the insole and the upper, and a shoe forming cavity is formed in combination with a shoe sole forming mold to form a shoe.

The shoe sole of the present invention is provided with a concave groove along the bending line in the stepped portion on the ground contact surface side of the shoe sole, and the belt-shaped reinforcing material crosses the concave groove from the sole material at the upper portion of the concave groove. Since the circumference is provided so as to be exposed, the degree of freedom of the belt-like reinforcing material can be ensured, and the repulsive force can be applied without significantly changing the bending resistance.

Further, the shoe sole of the present invention is provided with a concave groove along the bending line in the stepped portion of the shoe sole, and a belt-shaped reinforcing material is disposed across the concave groove, and the belt-shaped reinforcing material has a hardness of JIS- A 30-50, rebound resilience measured by JIS K 6255 Lupke method is 50-70% from 0 ° C. to 40 ° C., and it is a soft elastic body that does not reduce repeated stress. During running, the repulsive force of the shoe sole can be increased without a sense of incongruity, and the kicking after bending can be supported.

The shoe of the present invention has a shoe upper fixed to the upper part of the sole, and is suitable as an athletic shoe that supports children's running.

The form for implementing the shoe sole of this invention is demonstrated with reference to drawings.
FIG. 1 is a bottom view and a cross-sectional view along line AA of a stepping portion schematically showing a shoe sole (one-layer bottom) of the present invention.
FIG. 2 is a bottom view and a BB line sectional view of a stepping portion schematically showing a shoe sole (laminated bottom) of the present invention.
FIG. 3 is a view of a shoe sole (one-layer bottom) according to an embodiment of the present invention as seen from the bottom.
FIG. 4 is a view of the shoe sole (laminated bottom) of the embodiment of the present invention as seen from the bottom.
FIG. 5 is a plan view showing a state in which the reinforcing material is placed on the intermediate bottom except for the outer bottom in FIG.
6 is a cross-sectional view taken along the line CC of FIG.
FIG. 7 is a side view of a shoe using the sole of the present invention.

<Embodiment of the sole of the present invention>
The shoe sole of the present invention is roughly divided into two structurally.
The first shoe sole is a single layer in which a concave groove is provided along a bending line in a stepped portion on the ground contact surface side of the sole consisting of a single layer bottom, and a reinforcing material is embedded so as to cross the concave groove. At the bottom.
1A and 1B are a bottom view and a cross-sectional view taken along line AA of a stepping portion schematically showing one layer bottom of a shoe sole of the present invention.
The reinforcing material is made of a material having rubber elasticity, and two band-shaped reinforcing materials whose ends are hook-shaped are embedded in the stepping portion. The reinforcing material is exposed from the shoe sole in the concave groove portion of the shoe sole, and is embedded in the shoe sole at a place other than the concave groove of the shoe sole, and is firmly bonded to the shoe sole by an adhesion process. .
The reinforcing material does not adhere to the shoe sole in the groove, and a gap is provided between the groove and the reinforcing material is exposed in a state independent of the shoe sole, so that it does not interfere with bending resistance. The structure can be expanded and contracted. As the reinforcing material, vulcanized rubber whose main component is natural rubber having excellent elasticity is used.
In the case of a single-layer bottom, a foam material such as EVA sponge, RB sponge, or polyurethane foam is used for the sole material in consideration of lightness, wear resistance, and elasticity.

FIG. 3 is a view of the bottom of one layer of the embodiment of the present invention as seen from the bottom.
The shoe sole material is a foamed polyurethane bottom. A concave groove is provided along the bending line of the stepping portion of the shoe sole, and two strip-shaped reinforcing materials are embedded so as to cross the concave groove. In the vicinity of the concave groove, the two reinforcing materials are not bonded to the shoe sole and are in a state where the entire circumference is exposed. The band-shaped reinforcing material is a vulcanized rubber sheet mainly composed of natural rubber having good elasticity, and has a hardness of JIS-A 30-50 and a rebound resilience of JIS K 6255 measured by Rüpke type at 0 ° C to 40 ° C. A soft elastic body that is 50 to 70% and does not decrease the repeated stress is used.
The band-shaped reinforcing material is exposed on the concave groove in a state independent of the shoe sole, and the treading portion is easily bent during walking or running, and the elastic material returns quickly when deformed.

The second shoe sole is a shoe sole in which an outer sole and an intermediate sole are stacked. A concave groove is provided in the stepping portion of the intermediate sole on the ground surface side, and a belt-like reinforcing material is formed so as to cross the concave groove. Is a laminated bottom embedded between an outer bottom and an intermediate bottom.
FIG. 2 is a bottom view and a cross-sectional view taken along line BB of the stepping portion schematically showing the laminated bottom of the present invention.
In the concave groove provided in the stepping portion, a strip-shaped reinforcing material is exposed so that it can freely expand and contract without hindering bending resistance. The band-shaped reinforcing material has a hardness of JIS-A 30-50 and a rebound resilience of 50-70% measured from 0 ° C. to 40 ° C. according to JIS K 6255 Lupke method, so that repeated stress does not decrease. Soft elastic body.

In FIG. 2, two reinforcing members are inserted, but three may be used. On the concave groove, the strip-shaped reinforcing material is not bonded to the intermediate bottom and is exposed. It is better to have a gap between the concave groove and the reinforcing material, which is desirable because it has the effect of improving the flexibility. It is because the freedom degree of a strip | belt-shaped reinforcement material is ensured. Both ends of the reinforcing material have a bowl shape that increases the contact area. In the buried portion, the reinforcing material is firmly bonded to the outer bottom or the intermediate bottom with an adhesive.

FIG. 4 is a view of the shoe sole (laminated bottom) of the embodiment of the present invention as seen from the bottom.
A concave groove is provided along the bending line of the stepped portion on the ground surface side, and three reinforcing materials are embedded so as to intersect the concave groove. In the vicinity of the concave groove, the outer bottom is notched, so the intermediate bottom is exposed, and the strip-shaped reinforcing material embedded in the intermediate bottom is also exposed. On the concave groove, the strip-shaped reinforcing material is exposed in an independent state, the stepping portion is easily bent during walking and running, and the return of the deformed material is quick due to the elasticity of the reinforcing material.

FIG. 5 is a plan view showing a state in which three reinforcing members are placed on the intermediate bottom of FIG.
The end portion of the reinforcing material has a hook shape with a wide bonding area in order to increase the fixing force with the shoe.

6 is a cross-sectional view taken along the line CC of FIG.
A fitting portion for burying a band-shaped reinforcing material is formed in the middle bottom. In the vicinity of the concave groove along the bending line, a vertical groove parallel to the reinforcing material deeper than the fitting portion and the groove along the bending line is provided. This longitudinal groove forms a gap with the band-shaped reinforcing material when the band-shaped reinforcing material is disposed.

Example <Molding of Shoes of the Present Invention>
1. Preparation of Shoe Sole Three reinforcing members were inserted into the stepped bending portion where the outer bottom and the intermediate bottom were laminated to prepare the shoe sole of the example shown in FIG. At this time, vulcanized rubber mainly composed of natural rubber was used as a reinforcing material. This vulcanized rubber has a hardness of JIS-A 45 when measured at 25 ° C., and has a rebound resilience of 62% when measured at 0 ° C., 25 ° C. and 40 ° C. according to the JIS K 6255 Rupke method. Met.

2. 1. Shoe molded shoe upper is sewn and hung on the last with the insole. The shoe sole prepared in (1) was bonded to the lower surface of the shoe upper with an adhesive, and the last was cut out to obtain the shoe of the present invention.
This shoe is lightweight and excellent in flexibility, and is suitable for running with quick return after bending.
FIG. 7 shows a side view of the shoe of the present invention.

The bottom view and AA sectional view taken on the line of the step part which represented typically the shoe sole (1 layer bottom) of this invention. The bottom view and BB sectional view of the step part which represented typically the shoe sole (lamination bottom) of this invention. The bottom view of the shoe sole (1 layer bottom) of the Example of this invention. The bottom view of the shoe sole (lamination bottom) of the Example of this invention. In FIG. 4, the top view of the state by which the strip | belt-shaped reinforcement material was embed | buried under the intermediate bottom except the outer bottom. The CC sectional view taken on the line of FIG. The side view of shoes using the sole of the present invention.

1. Sole 2. Intermediate bottom 3. Outer base 4. 4. Band-shaped reinforcing material 5. Groove along the bending line Stepping part 7. Bending line8. Shoes 9. Shoe cover 10. 10. End of band-shaped reinforcing material Longitudinal groove parallel to the reinforcement

Claims (7)

A shoe sole in which a concave groove along a bending line is provided in a stepped portion on a ground contact surface side of a shoe sole, and a band-shaped reinforcing material is arranged so as to intersect with the concave groove, and the band-shaped reinforcing material is a concave groove portion. In, the shoe sole material is not bonded, the entire circumference is exposed, and is embedded in a part or all of the shoe sole at a location excluding the concave groove, and is fixed to the shoe sole. Shoe sole. A plurality of the strip-shaped reinforcing members are arranged so as to intersect with the concave grooves, and in the concave grooves, a gap is provided between the strip-shaped reinforcing members and can be freely prevented without hindering bending resistance. The shoe sole according to claim 1, which expands and contracts. The shoe sole is a shoe sole in which an outer bottom and an intermediate bottom are laminated, and the concave groove is provided along the bending line in the stepping portion of the intermediate bottom on the ground surface side so as to intersect the concave groove. A band-shaped reinforcing material is buried in the middle bottom, and the band-shaped reinforcing material is buried and fixed between the outer bottom and the middle bottom in a portion other than the concave groove, and the outer bottom is recessed. The shoe sole according to claim 1 or 2, characterized in that the belt-shaped reinforcing material and the intermediate bottom are exposed at the periphery of the groove. A fitting portion is provided in the intermediate bottom, and a band-shaped reinforcing material is embedded, and the fitting portion is provided along the fitting portion and the bending line in the vicinity of intersecting the concave groove along the bending line. 4. A shoe sole according to claim 3, wherein a longitudinal groove parallel to the reinforcing material deeper than the recessed groove is provided. The shoe sole is a single-layer foamed bottom, a concave groove is provided in the stepping portion on the ground contact surface side of the shoe sole, and a band-shaped reinforcing material is embedded so as to intersect the concave groove. The shoe sole according to claim 1, wherein the band-shaped reinforcing material is exposed in the groove portion. The band-shaped reinforcing material has a hardness of JIS-A 45 and a rebound resilience of 50 to 70% at 0 to 40 ° C. as measured by the JIS K 6255 Lupke method, so that repeated stress does not decrease. The shoe sole according to any one of claims 1, 2, 3, and 5, comprising a soft elastic body. 6. A shoe comprising a shoe upper fixed to an upper part of a shoe sole according to claim 1.