JP3936946B2 - Insole, footwear bottom and midsole - Google Patents

Description

  The present invention relates to an insole, footwear bottom and midsole that can prevent or correct hallux valgus.

  In many of the hallux valgus with pain, the heel falls inward (valgus), the arch of the foot is lowered, and the burden on the toe and the ball of the foot is increased. On the other hand, when the foot falls inward as a whole, the lateral arch of the foot is lowered and the distance between the metatarsals is expanded inward and outward, so that the width of the stepping portion is expanded and the toe is inducted into the toe. It is pulled by the muscles and the long toe extensors, so that the toes are halluxed.

The following patent documents 1 to 3 are known as inventions aimed at preventing or correcting such hallux valgus.
Japanese Patent Laid-Open No. 9-14405 (Summary) JP-A-9-191904 (summary) JP 2002-282011 (Abstract)

  In these patent documents, a bulge is mainly provided at a portion corresponding to a longitudinal arch or a lateral arch on the inner side of the foot so as to prevent a decrease in the arch and prevent or correct hallux valgus.

However, as described above, most of the hallux valgus have fallen inward, so the inner arch is lower.If the inner vertical arch is raised and only the arch is corrected, the inside of the arch A feeling of pushing up occurs.
Further, when the rear end portion of the insole is provided with a slope that becomes a downward slope as it goes from the inside to the outside, and the inward tilt is corrected, the lower end of the heel is shifted outward due to the downward slope to the outside. For this reason, the foot does not match the surface shape of the insole, and a feeling of pushing up occurs on the sole due to the rise of the insole.

  Accordingly, an object of the present invention is to provide an insole, footwear bottom, and midsole that can prevent or correct hallux valgus without causing a sense of push-up on the sole.

  In order to achieve the above object, the insole of the present invention is an insole comprising a soft part made of a foam and a hard part made of an elastomer having a hardness higher than that of the soft part. A ridge along an inner longitudinal arch, wherein the hard portion is at least a position posterior to the bottom of the fifth metatarsal bone in the insole and anterior to the grounded bottom of the rib Provided at the outer side of the cuboid joint at the position and the inner side of the rib, and at least in the inner side of the rib, the upper surface of the hard part gradually increases toward the inside of the foot. The hard portion is not provided on the outer side of the bottom portion of the fifth metatarsal bone and the rib in the insole, and the soft portion is inclined toward the upper side. At least the fifth metatarsal bone base and the insole It is provided outside of the bottom of the ground in the heel bone.

  According to the present insole, the hard portion is provided on the outer side of the cuboid joint and the inner side of the rib, while the soft portion is provided on the outer side of the bottom portion where the rib contacts the ground. The rise along the arch and the inclination of the inside of the hard part correct the fall into the heel, and even if this correction is made, the hard part provided on the outer part of the cuboid joint and the inner part of the rib By this, the bottom of the heel that touches the ground fits in the center of the left and right. That is, it is possible to correct the hallux valgus, which is one of the causes of hallux valgus, and to prevent the hook from shifting outward. Therefore, it is possible to prevent or correct hallux valgus without causing a feeling of pushing up on the sole of the foot.

  In addition, since the hard portion is not provided in the outer portion of the bottom portion to be grounded in the fifth metatarsal bone base and the rib, and the soft portion is disposed, the bone protrudes downward. There is no fear of feeling uncomfortable with the bottom of the fifth metatarsal bone or the ribs.

  The reason why the hard part is arranged on the outer side of the cuboid joint is that the outer vertical arch is the highest in this part. The rigid portion can support the outer vertical arch, which is useful for preventing or correcting hallux valgus in a form in which the outer vertical arch is lowered.

  In a preferred embodiment of the present invention, the soft part and the hard part are formed of a resin and / or rubber foam, and the difference in hardness between them is generally about 10 in JIS C type hardness in consideration of errors during molding. It is preferable to aim for a hardness difference of more than 1 degree. For example, the soft part is most preferably set to about 40 ° to 60 ° in terms of JIS C type hardness, and the hard part is most preferably set to about 70 ° to 80 ° in terms of JIS C type hardness.

  In a preferred embodiment of the present invention, the hard portion is further provided at a position for supporting a vertical arch formed in a stepped portion on the inside of the foot, the vertical arch support portion, the outer portion of the cuboid joint, and The hard part of the inner side of the rib is integrally formed with a resin foam.

Thus, by further disposing the hard portion at the position supporting the inner vertical arch, the lowering of the inner vertical arch can be reduced, and the effect of preventing or correcting hallux valgus is enhanced.
Also, since the hard arch support part, the outer part of the cuboid joint and the hard part of the inner part of the rib are integrally molded with resin, the hard part can be made into one part, so the number of parts increases. Can be prevented.

  In a further preferred embodiment of the present invention, the longitudinal arch support part for supporting the longitudinal arch and the inner side part of the rib are provided in a substantially inner half region in the width direction of the foot.

  In this way, the provision of the rigid longitudinal arch support and the inner side of the rib in the region on the inner side in the width direction of the foot can surely prevent or correct the hallux of the heel, thus preventing or correcting hallux valgus. The effect of increases.

  In another preferred embodiment of the insole, the soft portion is provided over substantially the entire surface of the insole, and a recess is formed in a portion of the back of the insole where the hard portion is disposed. The soft portion and the hard portion are laminated so that the hard portion fills the area.

  In this way, by arranging the hard part on the back surface of the insole and forming the entire surface layer with the soft part, the touch transmitted to the sole becomes soft, so that the push-up feeling can be further reduced.

In yet another preferred embodiment of the insole, the upper part for supporting the heel from the periphery is formed integrally with the soft part.
By supporting the periphery of the heel by the winding part in this way, it is possible to effectively prevent the heel from shifting outward.

The present invention is also applicable to footwear bottoms having an insole as described above.
In a preferred embodiment of the footwear bottom, the footwear sole further includes an insole that supports the insole, and a buffer bottom disposed below the insole, and the insole is formed of a material harder than the hard portion.

Even if the insole having the soft part and the hard part as described above is in contact with the sole, if the insole immediately below the insole is soft, the effect of the insole having both the soft part and the hard part is reduced. There is a risk. On the other hand, by forming the insole with a material harder than the hard part of the insole, it is possible to ensure the above-described effect by the insole.
In addition, cushioning properties can be ensured by providing a buffer bottom having a hardness smaller than the hardness of the midsole under the midsole.

In a more preferred footwear sole of the present invention, the soft part is integrally formed with a winding part that supports the heel from the periphery, and the insole has a winding support part that supports the winding part of the insole.
Since the hoisting support portion of the hard insole supports the upper portion of the soft insole, it is possible to effectively prevent displacement of the heel to the outside without causing a sense of incongruity around the heel.

The technical idea of the present invention can also be applied to a midsole.
That is, the midsole of the present invention is a midsole having a soft part made of a foam and a hard part made of an elastomer having a hardness higher than that of the soft part, and is along a vertical arch inside the stepped part. And the rigid portion is at least a position posterior to the bottom of the fifth metatarsal bone in the midsole and anterior to the grounded bottom of the rib. Provided at the outer side of the rib and the inner side of the rib, and at least at the inner side of the rib, the upper surface of the hard part gradually goes upward as it goes to the inside of the foot. Inclined, the hard portion is not provided on the outer side of the fifth metatarsal bone base in the midsole and the bottom of the rib in contact with the ground, and the soft portion is at least the midsole In It is provided outside of the bottom of the ground in the fifth metatarsal bone bottom and calcaneus.

  Since a hard insole may be disposed on the midsole, the midsole does not immediately have the same effect as the insole, but the midsole above the midsole is the soft part of the midsole. By forming the midsole with a material softer than the soft part of the midsole, the midsole has the same effect as the insole.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 4 show a first embodiment.

Example 1 :
FIG. 1 is an exploded perspective view for a left foot of women's shoes provided with an insole 1 according to the present invention. An insole 4 is integrally fixed to a sole (an example of a footwear sole) of the women's shoes. A midsole (an example of a buffer bottom) 5 and an outer sole (grounding bottom) 6 made of a resin foam are laminated below the midsole 4.

  The insole 1 is disposed on the insole 4 and has an upper surface 12 in contact with the sole and a lower surface 13 in contact with the insole 4 of FIG. 2, and plays a role of absorbing impacts on the foot. Therefore, the insole 1 is formed of a foam of resin or rubber.

On the other hand, the insole 4 plays a role of supporting a foot and dispersing an impact at the time of landing. Therefore, it is formed of a material harder than the insole 1 and the midsole, and is formed, for example, by impregnating a thick board with resin.
In addition, the hardness of the insole 4 is set to 90 ° or more in JIS A type hardness, for example.

As shown in FIG. 5 (a), a longitudinal arch La is formed on the inner side 11 (FIG. 4) of the step part of the foot, and the insole 1 extends along the longitudinal arch La as shown in FIG. A ridge 14 is formed.
As shown in FIG. 2, the insole 1 includes a soft part 2 made of a foam and a hard part 3 made of a foam having a hardness higher than that of the soft part 2. Note that a nonwoven fabric or the like may be provided on the soft portion 2 of the insole 1.

The soft portion 2 is provided over the entire surface of the insole 1 and, as shown in FIGS. 3A to 3E, on the lower surface 13 portion of the insole 1 where the hard portion 3 is disposed. A recess 21 is formed. The soft part 2 and the hard part 3 are laminated so that the hard part 3 fills the recess 21.
The planar shape of the recess 21 and the planar shape of the hard portion 3 are the same.

  The soft part 2 of FIG. 1 is integrally formed with a winding part 22 that supports the heel from the periphery. The insole 4 has a hoisting support portion 42 that supports the hoisting portion 22 of the insole 1. Note that the winding upper portion 22 and the winding support portion 42 are wound upward at the periphery.

  As shown by shading in FIG. 4, the hard part 3 is provided at least on the outer part 31 of the cuboid joint J and the inner part 32 of the rib Br in the insole 1. The cuboid joint J is located behind the fifth metatarsal bone base (fifth metatarsal proximal head) B5 and is in contact with the bottom portion (radius protuberance) Brb of the rib Br ( (See FIG. 5B). The hard portion 3 further includes a vertical arch support portion 33 at a position where the vertical arch La is supported. That is, the hard part 3 is provided in the part which covers the rear part of the cubic bone Bc, the outer part of the front end part of the rib Br, the inner part of the rib Br, and the inner longitudinal arch La (FIG. 5A) from below. ing.

The longitudinal arch support portion 33 and the inner side portion 32 of the rib in the hard portion 3 are provided in a substantially inner half region in the width direction of the foot, and the hard portion 3 is provided in a half region of the inner side 11 of the foot. The first metatarsal distal head B1 and the second metatarsal distal head B2 are continuously provided from the vicinity of the rear to the vicinity of the rear end of the radius Br.
The hard portion 3 including the vertical arch support portion 33, the outer side portion 31 of the cuboid joint, and the inner side portion 32 of the rib is integrally formed of a resin foam.

  The outer part 31 of the cuboid joint protrudes from the vertical arch support part 33 toward the diagonally rear side outside the foot. That is, the left foot is formed in an inverted “G” shape when viewed from the upper surface 12 of the insole 1, and the right foot (not shown) is generally formed as a “G” shape when viewed from the upper surface 12 of the insole 1. Is formed.

  The hard portion 3 is not provided on the outer side of the bottom portion Brb that contacts the fifth metatarsal bone bottom B5 and the rib Br in the insole 1. Therefore, it is necessary to provide the soft part 2 at least in these parts.

  As shown in FIGS. 3A to 3E, the upper surface of the hard portion 3 gradually moves upward (displaces upward) as it goes to the inner side 11 of the foot in the inner portion of the foot. So as to be inclined. This inclination and the ridge 14 can prevent or correct the fall of the heel into the inner side 11. That is, the hallux valgus that is one of the causes of hallux valgus can be corrected. On the other hand, even if the correction is made, the rib protrusion Brb fits in the center of the right and left of the foot by the outer portion 31 of the rigid rib-cubic joint and the inner portion 32 of the rib, thereby preventing the rib from shifting to the outer side 10. Can do. Therefore, it is possible to prevent or correct hallux valgus without causing a feeling of pushing up on the sole of the foot.

Example 2 :
FIG. 6 shows a midsole 5A of an athletic shoe.
As shown by a broken line in the bottom view of FIG. 6A, the soft portion 2 and the hard portion 3 are similarly provided in the midsole 5A. However, in the case of the midsole 5 </ b> A, the soft part 2 is provided in the lower part, and the hard part 3 is laminated on the soft part 2.
Other configurations of the midsole are the same as in the case of the insole 1, and the same reference numerals are given to the same or corresponding parts, and detailed description thereof is omitted.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, the outer portion 31 of the cuboid joint, the inner portion 32 of the rib, and the longitudinal arch support portion 33 may be separated into islands without being integrally formed.
Moreover, although the soft part 2 and the hard part 3 were laminated | stacked, it is not necessary to laminate | stack, You may join both edge parts mutually.
Instead of the foam, the hard part may be an elastomer non-foam having a higher hardness than the soft part. In this case, the hardness of the non-foamed material is measured by the JIS A type hardness meter, and for example, silicone rubber can be adopted as the elastomer.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.

  The present invention can be applied to footwear such as sandals in addition to the shoe sole.

1 is an exploded perspective view of women's shoes according to a first embodiment of the present invention. It is the perspective view which looked at the insole and insole from the back. It is a cross-sectional view along the sectional view of the insole plan view and ae. It is a schematic plan view which shows the relationship between a hard part and a soft part, and the skeleton of a leg | foot. It is a side view of the skeleton of the foot seen from the inside and outside. It is a bottom view of the midsole which shows 2nd Example, and a transverse cross section along the sectional lines of b and c.

Explanation of symbols

1: Insole 2: Soft part 21: Recess 22: Upper part 3: Hard part 31: Outer part of cuboid joint 32: Inner part of rib 33: Vertical arch support part 4: Insole 42: Upper part 5A : Midsole B5: Bone metatarsal bone Br: Radius Brb: Bottom J: Cubic joint La: Longitudinal arch

Claims (10)

An insole comprising a soft part made of a foam and a hard part made of an elastomer having a larger hardness than the soft part,
Has a ridge along the longitudinal arch inside the arch,
The hard portion is at least a position posterior to the bottom of the fifth metatarsal bone in the insole, and an anterior portion of the cuboid joint at a position in front of the bottom to be grounded in the rib, On the inside of the bone,
The hard part, at least in the inner part of the rib, is inclined so that the upper surface of the hard part gradually goes upward as it goes to the inside of the foot,
The hard part is not provided on the outer side of the bottom part of the fifth metatarsal bone and the rib in the insole to be grounded,
The soft part is an insole provided at least on the outer side of the bottom part of the fifth metatarsal bone bottom and the rib in the insole that contacts the ground.   In Claim 1, The said hard part is further provided in the position which supports the vertical arch formed in the step part inside a foot | leg, The vertical arch support part, the outer part of the said cuboid joint, and the inner side of a rib An insole where the hard part of the part is molded integrally with a resin foam.   3. The insole according to claim 2, wherein the longitudinal arch support portion for supporting the longitudinal arch and the inner side portion of the rib are provided in a region of a substantially inner half in the width direction of the foot.   In Claim 1, 2 or 3, the soft portion is provided over substantially the entire surface of the insole, and a recess is formed in a lower surface portion of the insole where the hard portion is disposed, and the recess is An insole in which the soft part and the hard part are laminated so that the hard part is filled.   5. The insole according to claim 1, wherein the soft portion is integrally formed with a winding portion that supports the heel from the periphery. A footwear bottom comprising the insole according to any one of claims 1 to 4,
The footwear sole, further comprising an insole that supports the insole and a buffer bottom disposed below the insole, wherein the insole is formed of a material harder than the hard portion.   The footwear bottom according to claim 6, wherein the soft portion is integrally formed with a winding portion that supports the heel from the periphery, and the insole has a winding support portion that supports the winding portion of the insole. A midsole comprising a soft part made of a foam and a hard part made of an elastomer having a larger hardness than the soft part,
Has a ridge along the longitudinal arch inside the arch,
The hard portion is at least a position behind the fifth metatarsal bone bottom in the midsole and an anterior portion of the cuboid joint at a position ahead of the bottom to be grounded in the rib, On the inside of the bone,
The hard part, at least in the inner part of the rib, is inclined so that the upper surface of the hard part gradually goes upward as it goes to the inside of the foot,
The hard portion is not provided on the outer side of the bottom of the fifth metatarsal bone bottom and the rib in the midsole,
The soft part is a midsole provided at least on the outer side of the bottom part of the midsole in the midsole and the bottom part of the rib in contact with the ground.   9. The hard part according to claim 8, wherein the hard part is further provided at a position for supporting a vertical arch formed in a step part inside the foot, the vertical arch support part, an outer part of the cuboid joint, and an inner side of the rib. A midsole in which the hard part of the part is integrally molded with resin foam.   10. The midsole according to claim 9, wherein the longitudinal arch support portion that supports the longitudinal arch and the inner side portion of the rib are provided in a substantially inner half region in the width direction of the foot.

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