JPH0551281B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sole for athletic shoes.

(Prior technology) Conventionally, a steel plate-like shank was attached to the sole of the shoe from the calcaneus to the metatarsal bone to support the arch of the foot during walking and to improve stability during walking. This is generally well known.

When changing direction during normal walking, or due to muscle ligament fatigue during long walking, the heel of the foot pronates or the stepping part of the foot rotates as a natural movement of the foot. It should be removed. At this time, since the forefoot and hindfoot rotate in a twisting manner, the twisting of the forefoot and hindfoot is restrained by a flat steel shank attached to the sole corresponding to this part. However, it had the disadvantage that the natural movement of the feet was inhibited when walking.

From this point of view, soles that do not use shank may be considered, but since the pronation of the heel of the foot or the supination of the stepping part of the foot during walking are not constrained, overpronation or oversupination may occur. Aroused, leg muscles,
It has the disadvantage of causing damage to ligaments and joints.

(Problems to be Solved by the Invention) This invention promotes the natural movement of the foot during walking, and prevents excessive pronation of the heel of the foot and excessive supination of the stepping part of the foot. The purpose of this invention is to provide a sole for athletic shoes that can be used in sports shoes.

(Means for Solving the Problems) Hereinafter, the present invention will be explained with reference to the drawings. The present invention has a bending mechanism in the sole portion corresponding to the joint group C of the tarsal bone group A and the metatarsal group B. A groove 1 is provided, and the bent groove 1
A part 2 of the sole corresponding to the forefoot part 2 and a part 3 of the sole corresponding to the rear foot part of the shoe sole are connected by a plurality of elastic rebound elastic strips 4, 4, . . . in a flexible manner. The gist of the invention is a sole for athletic shoes.

In this invention, the shoe sole is made of ordinary rubber or synthetic resin, and the part corresponding to the joint group C between the tarsal bone group A and the metatarsal group B, that is, the first cuneiform bone and the Corresponds to the joint with the first metatarsal, the joint between the second cuneiform and the second metatarsal, the joint between the third cuneiform and the third metatarsal, and the quadrate bone and the fourth and fifth metatarsal joints. A bending groove 1 is formed in the lateral direction of the sole. A single bending groove 1 may be provided, or a plurality of bending grooves 1 may be provided.

In this invention, the elastic rebound strip 4,
4... is composed of a coil spring, an air spring, a rubber strip alone or a combination thereof. In this invention, when the sole is molded from ordinary rubber, the stretchable rebound elastic strips 4, 4... can be molded at the same time as the sole is molded, so the molding of the stretchable rebound elastic strips 4, 4... is extremely simple. It is.

(Operations and Effects of the Invention) Since the present invention is configured as described above, when walking while wearing shoes using the sole of the present invention, the heel of the foot rotates as a natural movement of the foot. When the foot inverts or supinates, the resilient strips 4, 4... expand and contract independently according to the movement of the foot, bending along the bending groove 1, and forming a part 2 corresponding to the forefoot of the sole. Twisting of the portion 3 corresponding to the hindfoot is allowed, and at the same time the rebound elastic strips 4, 4...
The contraction force restrains excessive twisting of the portion 2 corresponding to the forefoot and the portion 3 corresponding to the hindfoot of the sole, and prevents excessive pronation or supination of the heel. Specifically, when the heel of the foot pronates, the part 3 (heel) of the sole corresponding to the rear foot pronates inwardly, with the bending groove 1 formed in the sole as a boundary, depending on the movement of the foot. The groove 1 tends to tilt in the direction and twist.
The repulsion elastic strip 4' arranged on the inner side of the groove 1 is stretched and bent toward the inner rear to a greater extent than the repulsion elastic strip 4'' arranged on the outer side of the groove 1, and corresponds to the rear foot part of the sole. At the same time, a larger contraction load is applied to the stretched elastic strip 4' than the elastic strip 4'', which corresponds to the rear foot portion of the sole. Excessive kinking of the portion 3 in the medial direction, ie excessive pronation, is prevented.

In addition, when the stepping part of the foot supinates, the part 2 of the sole corresponding to the forefoot may tilt and twist outward, bordering on the bending groove 1 formed in the sole as the foot moves. As a result, the resilient strips 4'' disposed on the outer side of the groove 1 are stretched outward and bent to a greater extent than the resilient strips 4' disposed on the inner side of the groove 1, The part 2 corresponding to the forefoot of the sole is allowed to twist outward, and at the same time, a larger contraction load is applied to the stretched rebound elastic strip 4'' than to the rebound elastic strip 4'. Excessive lateral twisting of the portion 2 of the sole corresponding to the forefoot, ie excessive supination, is prevented.

Therefore, the natural movement of the foot during walking is promoted, and excessive pronation of the heel of the foot and excessive supination of the stepping portion of the foot are prevented.

(Example) As shown in FIGS. 2 and 3, an opening 511 is provided at the tip,
Parallel sliding chamber 5 with insertion port 512 formed at the rear end
Transparent hard plate 5 formed with 1, 51, 51
In the rear part 41a, 41a, 41a from each insertion opening 512, 512, 512, a collar 411a,
Coil springs 4b, 4b, 4b are interposed in the front part of the sliding chambers 51, 51, 51 by inserting stretchable repulsive elastic strips 4, 4, 4 made of rubber strips provided with 411a, 411a. The front portions 42a, 42a, 42a of stretchable rebound elastic strips are made to protrude from the openings 511, 511, 511 through the rubber strips, and the tip sides 421a, 421a, 421a are connected by a hard plate 6. A unitized repulsion elasticity device A having stretchable repulsion elastic strips 4, 4, 4 was prepared.

On the other hand, a bending groove 1 is provided through the sole at a portion of the sole corresponding to joint group C between tarsal bone group A and metatarsal group B, and a bending groove 1 is provided through the sole at a portion corresponding to joint group C between tarsal bone group A and metatarsal group B, and a portion 2 corresponding to the rear foot portion of the shoe sole and the sole are formed. A hard plate 5 storage chamber 31 and transparent windows 32, 32, 32 are provided on the inner surface side of the portion 3 corresponding to the hind leg.
A shoe sole B was prepared in which hard plate 6 storage chambers 21 were formed on the inner surface side of the portion 2 corresponding to the forefoot portion of the shoe sole. Then, the unitized repulsion elasticity device A in which the above-mentioned repulsion elasticity strips 4, 4, 4 are set on the sole B, and the hard plate 5 is placed in the storage chamber 31.
Coil spring 4b from see-through windows 32, 32, 32...
4b, 4b are accommodated in a transparent manner, and front portions 42a, 42 of elastic rebound elastic strips made of rubber strips
a and 42a are placed across the upper surface of the bending groove 1 and attached to the housing chamber 21 of the hard plate 6 by adhesion, thereby obtaining the sole for sports shoes according to the present invention.

The athletic shoe sole according to this embodiment is constructed as described above, and when wearing athletic shoes equipped with this sole and the heel of the foot pronates when walking or running, the sole of the shoe will change according to the movement of the foot. The part 3 (heel part) of the sole corresponding to the rear foot part of the shoe sole tends to incline and twist inwardly with the formed bending groove 1 as a boundary, and as a result, the rubber placed on the inner side of the groove 1 While compressing the coil spring 4b, the elastic rebound elastic strip 4' made of a strip is directed inward and rearward to a greater extent than the elastic rebound elastic strip 4'' made of a rubber strip disposed on the outer side of the groove 1. the sole is stretched and bent, allowing the portion 3 of the sole corresponding to the rear foot to twist inward;
At the same time, the rebound properties of the coil spring are added to the greatly stretched rebound elastic strip 4', and a larger contraction load is applied to the rebound elastic strip 4'', so that the part 3 corresponding to the rear foot of the sole is directed inwardly. Excessive twisting, that is, excessive pronation, is prevented.Furthermore, when the stepping part of the foot supinates, the sole of the shoe bends along the bending groove 1 formed in the sole according to the movement of the foot. As the portion 2 corresponding to the forefoot tends to tilt outward and twist, the elastic repulsion elastic strip 4'' made of a rubber strip disposed on the outer side of the groove 1 acts as a coil spring 4b''. An elastic rebound elastic strip 4' consisting of a rubber strip placed on the inner side of the groove 1 while compressing the
The part 2 corresponding to the forefoot part of the sole is allowed to twist outwardly, and at the same time, the coil spring 4b'' repulses the repulsion elastic strip 4'' which is stretched out to a greater extent. Since the stretchable resilient strip 4' is subjected to a larger contraction load than the elastic elastic strip 4', excessive twisting of the part 2 of the sole corresponding to the forefoot in the lateral direction, that is, excessive supination, is caused. Prevented. Therefore, the natural movement of the foot during walking is promoted, and excessive pronation of the heel of the foot and excessive supination of the stepping portion of the foot are prevented. Further, the transparent windows 32, 32, 32, . . . allow the coil springs 4b, 4b, 4 when worn.
It was interesting to be able to confirm the expansion and contraction of b. Furthermore, since the stretchable elastic strips 4, 4, 4 are integrated into a repulsive elastic device, attachment to the sole of the shoe is easy. Note that the reference numeral 7 in the drawings indicates a midsole.

[Brief explanation of drawings]

The drawings show an embodiment, and FIG. 1 is a sketch, FIG. 2 is a sectional view taken along the line X--X in FIG. 1, and FIG. 3 is a plan view of the repulsion device. FIG. 4 is an explanatory diagram showing the skeletal structure of the foot. Explanation of symbols, 1...Bending groove, 2...Part corresponding to the forefoot part of the sole, 3...Part corresponding to the rear foot part of the sole, 4...Stretchable rebound elastic strip, I... ... Tarsal bone group, B... Metatarsal group, C... Joint group.

Claims (1)

[Claims] 1 A bending groove 1 is provided in the part of the sole corresponding to the joint group C of the tarsal group A and metatarsal group B, and the part 2 of the sole corresponding to the forefoot and the sole A sole for athletic shoes characterized in that a portion 3 corresponding to a rear foot portion is connected in a flexible manner with a plurality of stretchable repulsion elastic strips 4, 4, . . .