JP2002000302A - Shoe preventing hallux valgus and shoe last - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shoe which helps normal growth of children's feet and prevents hallux valgus and flatfoot. SOLUTION: A lateral angle at an instep spot covering a hallux and that at a fifth toe are made different to every nominal sizes of shoes 2a, 2b, 2c, 2d, 2e, and the laterall angle of hallux a1-a5 is increased gradually in the order of a1<a2<a3<a4<a5 as in the order of the nominal sizes of shoes 2a<2b<2c<2d<2e, and the lateral angle at the fifth toe b1-b5 is also increased in the order of b1<b2<b3<b4<b5, and the lateral angle of a small-sized shoe is fixed small by measuring in a measure method of a Japanese shoe research institute, then, a free movement of children's toes on the growth process is guaranteed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe for preventing hallux valgus and a last for use in manufacturing the shoe.

[0002]

2. Description of the Related Art Hallux valgus refers to a disorder in the foot where the toe is bent in the direction of the fifth toe at the site of the metatarsophalangeal joint. However, there is no clear definition as to what is called a hallux valgus when the hallux valgus more than normal position. Patients with severe valgus abuse that are severely painful and cause significant impairment in daily life are eligible for treatment. Further, a disorder of the foot where the fifth toe is bent toward the first toe is called varus valgus. In the present invention, valgus valgus is a general term for valgus and valgus.

[0003] As the degree of valgus progresses, the toe of the metatarsophalangeal joint assumes a dislocated position, and the first metatarsal deviates inward to deform the toe to the lateral position. " In particular, redness, swelling, and pain are added to the medial part of the metatarsal head, and bursal swelling often occurs. Recently,
BACKGROUND ART The increasing number of foot disorders due to hallux valgus in growing children's feet has demanded an urgent social response.

[0004]

The hallux valgus may have several factors, one of which is the influence of shoes. Human feet start to grow from birth, 16
It is said that growth stops when the child is about 17 years old.

In order to prevent the hallux valgus of the child's foot, it is necessary to allow the toes to move in the shoe in accordance with the changing side angle of the child's foot. The first toe side angle and the fifth toe side angle, which affect the hallux valgus, are designed to be constant in all sizes in size grading, and special consideration is given to the healthy development of the child's feet during the growth process. It was not. Originally, the shape of the feet varied from person to person, and as long as they were wearing shoes tailored specifically for them, the shoes were not affected by hallux valgus.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shoe for preventing hallux valgus, which is designed so that a toe can be freely moved in a shoe by changing a side angle for each nominal size according to the growth of a child's foot, and the shoe. To provide a last for use in the manufacture of a shoe.

[0007]

In order to achieve the above object, in the shoe according to the present invention, the side angles of the portions corresponding to the first toe and the fifth toe of the shoe upper cover are changed for each nominal size of the shoe. It is something.

In addition, the side angles of the small toe-sized shoes corresponding to the first and fifth toes are measured and set to be small by the shoe lab measurement method, and the shoes of the toes of the child during the growth process are set. It guarantees free movement in the space.

Further, in the last of the last for preventing hallux valgus according to the present invention, the first toe side angle and the fifth toe side angle are standardized, and the values are changed stepwise according to the growth of the child's foot. Things.

In addition, the last of the last is increased stepwise by measuring the side angles of the first and fifth toes according to the nominal size according to the growth of the child's foot by a shoe-based measurement method. The shape is set to guarantee the movement of the toes of the child in the growth process.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The hallux valgus prevention shoes according to the present invention are manufactured by using a shoe last that has different side angles of portions corresponding to the first and fifth toes of the shoe upper cover for each of the nominal sizes of the shoes.

FIG. 1 is a schematic diagram showing changes in the skeletal structure of a normal child's foot during the growth process from the age of 3 to 17 years. In FIG. 1, until about three years old after birth, the bones of the child's feet have not yet formed solid bones like adults, and are in the state of cartilage. The feet at this time are in the shape of a spread finger (fan shape).

[0013] The ossification of bones begins around the age of four and gradually becomes larger and firmer. Also, from around this time, foot arches that serve to absorb the impact of walking and running have begun to form.

[0014] Thereafter, by the age of fifteen, the degree of formation further increases, and at the age of sixteen to seventeen, the growth of the foot is almost completed, and as the bone ossifies and grows, the shape of the foot changes from a sector shape to a foot shape. The finger has a shape that has been closed.

As described above, the first and fifth toe angles of the child's foot are changing with the growth. In the present invention, the side angles of the first and fifth toes of the shoe are adjusted to the growth of the child's foot, and the side angles are changed for each nominal size, so that the toes can freely move in the shoe. It is guaranteed.

FIG. 2 shows a typical method of measuring the side angle of the hallux valgus angle. In FIG. 2, as a representative measurement method of the toe angle, an X-ray measurement method, an all-in-one measurement method, and a shoe-ken type measurement method are known. The hallux valgus angle is originally the angle between a line passing through the center of the first metatarsal bone and a line passing through the center of the first base phalanx by X-ray photography, and the X-ray measurement method shown in FIG. This is the case.

Since the angle between the tangent line of the toe and the tangent line on the inner side of the heel at the projection of the first MP joint of the contour line is almost equal, a method of substituting this angle is shown in FIG. 2 (b). This is the all-course measurement method shown below. In addition, in the shoe-ken type measurement method, as shown in FIG. 2 (c), a line drawn parallel to the center line of the foot at the inner side of the first MP joint and the highest heel inside the toe, as shown in FIG. An angle with a line connecting 16% or 18% (there are also two types) from the point of projection is defined as the hallux valgus angle.

Although FIG. 2 shows the first toe, the same applies to the side angle of the fifth toe. The value of the hallux valgus angle may be represented by any of the measurement results of the X-ray measurement method, the total crawling measurement method, or the shoe labor measurement method, but in this embodiment, the hallux valgus angle is measured by the shoe labor measurement method. It shall be shown by the numerical value shown. For example, as shown in FIG. 3, when the angle a of the first toe side is 15 ° or more as measured by the Shoeken type measurement method, it is considered that the hallux valgus.

In the present invention, in FIG. 3, when the first toe side angle is a and the fifth toe side angle is b, the value of the first toe side angle a is set for each of the nominal sizes of shoes according to age. For example, the values are set as shown in Table 1.

[0020]

[Table 1]

Similarly, the value of the fifth toe side angle b is standardized for each nominal size of the shoe according to the age, and set to, for example, the values in Table 2.

[0022]

[Table 2]

FIG. 4 shows an example of setting the first toe and fifth toe side angles of the last of the last. In this example, the last of the last is 3
The last 1a for the age of about 5 years, the last 1b for the age of about 5 years,
A total of five types of shoe lasts 1c for the age of about 10 years, shoe lasts 1d for the age of about 15 years, and shoe lasts 1e for the age of about 17 are prepared. The first toe-side angle of the last 3a for a three-year-old is a1, the fifth toe-side angle is b1, and the last for a 5-year-old is 1b.
The first toe-side angle is a2, the fifth toe-side angle is b2, the last toe-side last shoe 1c is a3, the fifth toe-side angle is b3, and the last is about 15 years old. When the first toe side angle of the last 1d is a4, the fifth toe side angle is b4, the first toe side angle of the shoe last 1e for about 17 years old is a5, and the fifth toe side angle is b5, In the invention, the first toe, the fifth
The first toe of each last 1a to 1e is adjusted in accordance with the growth (age) of the child's foot, instead of simply enlarging or reducing the toe side angle with respect to the size of the last of the last. The side angles a1 to a5 are as follows: a1 <a2 <a3
The values are gradually increased in the order of a <4 <a5.

Similarly, for the last toe side angles b1 to b5 of the lasts 1a to 1e, b1 <b2 <b3 <b4 <
b5, and the first of each last last 1a to 1e.
The toe and fifth toe side angles are standardized to the values shown in Tables 1 and 2.

The growth (age) of a child's foot corresponds to the size of the nominal size of the last of the last. Table 3 shows a setting example of the first toe and fifth toe side angles for each of the nominal sizes of the last of the last expressed in “cm”.

[0026]

[Table 3]

The upper cover as a hallux valgus preventive shoe according to the present invention is suitable for lasts in which the side angles of the first toe and the fifth toe are set, for example, in the range shown in Table 3 for each nominal size of the shoe. It is a pattern designed to have a shape that changes. Each of the shoe lasts 1a to 1e having a size corresponding to the size shown in Table 3 is designed for each of the shoe covers designed for each of the nominal shoe sizes.
Is selected and hung on the last of the last, the sole is formed in the last of the shoe molds, and after molding, the mold is released to correspond to the shape of each last 1a to 1e, as shown in FIG. like,
3 years old shoes 2a, 5 years old 2b, 10 years old shoes 2
c, shoes 2d for about 15 years old and shoes 2e for about 17 years old are obtained.

The obtained shoe has a shape in which the side angles corresponding to the first and fifth toes of the shoe upper cover correspond to the degree of growth of one foot for each nominal size of the shoe. That is, the first toe side angles a1 to a5 are as follows: a1 <a2 <a3a <
4 <a5, and gradually increase in the order of
Regarding the fifth toe-side angles b1 to b5 of a to 1e, b1 <
The shoes which increase in the order of b2 <b3 <b4 <b5 are obtained.
In particular, for example, in a child's shoe having a nominal size of 14 cm or less (about 3 to 5 years old or less), the toes can be freely moved in the shoe at the toe portion of the shoe where the toes are located, Shoes can prevent hallux valgus, which is a problem.

[0029]

As described above, according to the present invention, the first and fifth toe angles are set for each nominal size in accordance with the change in the side angle of the child's foot during the growth period. Even when a child in a growing period wears the hallux valgus prevention shoes according to the present invention, the movement of the toes is not restricted, and the toes can be freely moved in the shoes as in the case of the customized shoes. According to the present invention, it is possible to obtain a remarkable effect on prevention of hallux valgus and flat feet, while promoting normal rearing of a child's foot in a growing process.

Further, according to the present invention, the angles of the first toe and the fifth toe of the shoe upper for each nominal size are standardized in advance, so that the design can be easily performed by using the CAD system.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing changes in the skeletal structure of a standard child's foot during the growth process from the age of 3 to 17 years.

FIG. 2 is a diagram showing a typical method for measuring hallux valgus angle.

FIG. 3 is a diagram illustrating a first toe angle and a fifth toe angle;

FIG. 4 is a diagram showing an example of setting a first toe and a fifth toe side angle of a last of a last.

FIG. 5 is a view showing an example of hallux valgus prevention shoes according to the present invention.

[Explanation of symbols]

 1a-1e Last last 2a-2e Shoes

Claims (4)

[Claims] 1. A hallux valgus prevention shoe, characterized in that the side angles of the portions corresponding to the first and fifth toes of the shoecap are different for each nominal size of the shoe. 2. The first toe and the fifth toe of a shoe having a small nominal size.
The side angle of a part corresponding to a toe is measured by a shoe-based measurement method and set to a small value to assure free movement of a toe of a growing child in a shoe. 2. The hallux valgus prevention shoes according to 1. 3. A last for preventing hallux valgus, characterized in that the side angles of the first toe and the side of the fifth toe are standardized, and the values are changed stepwise according to the growth of the child's foot. 4. The last of the last is first for each nominal size.
The side angle of the toe and the fifth toe is measured in accordance with the growth of the child's foot by the shoe-based measurement method and gradually increased to a shape that guarantees the movement of the toe of the growing child. A last for a hallux valgus prevention shoe, characterized in that: