JP2554376Y2 - Arch pad for both axes - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arch pad, and more particularly to an arch pad for reinforcing a foot arch.

[0002]

2. Description of the Related Art Conventionally, in order to alleviate a walking disorder due to a decrease in a foot arch or to recover and prevent a decrease in an arch, for example, an elderly person, a sportsman, or a person with a reduced arch,
It has been suggested that arch pads are placed directly on the insole of the shoe, or used under the insole, for people who are on the decline, those who are at risk of falling, those who have pain in their feet, knees or hips. ing. FIG. 4 shows a conventional arch pad, in which a horizontal axis arch pad 1 and a vertical axis arch pad 2, 3 are used according to the location and degree of an obstacle, and a predetermined thickness is applied to a predetermined location according to a doctor's prescription. Deploy. This is because the maximum effect is aimed at a predetermined local part.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an arch pad which can be easily used by anyone, and which integrates three kinds of pads which do not require positioning of each other and which has a small displacement. I do. Another purpose of the present invention is
An object of the present invention is to provide an arch pad having a structure that is easy to manufacture.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a planar shape having a profile in which the lateral arch and the vertical arch (inside and outside) of the sole are almost completely covered and the corners are rounded. A biaxial arch pad comprising a fabric and a viscoelastic polyurethane resin pad integrally adhered to the back surface of the fabric, wherein the viscoelastic polyurethane resin pad has a curved surface in the shape of a convex lens facing downward. . According to the present invention, the present invention can provide an arch pad that can be easily used by anyone and has a small displacement.

Hereinafter, the present invention will be described in detail. First, reference is made to FIGS. FIG. 1 shows an arch pad 10 for the left foot as viewed from the back side of the foot, and includes a viscoelastic polyurethane pad 11 and a cloth 12 bonded to the surface thereof. As shown in FIGS. 2 and 3, the viscoelastic polyurethane pad 11 has a downwardly convex and gentle arc shape, has an arc shape in both the vertical and horizontal directions, and has a convex lens-like curved surface as a whole. I have. The outer shape is a rectangle or a parallelogram corresponding to the horizontal arch and the vertical arch (inside and outside), and the corners are rounded. FIG. 4 shows a comparison with the related art.
The upper surface of the viscoelastic polyurethane pad 11 is flat and has a fabric 12 integrally bonded thereon. The fabric 12 is wider than the contour of the viscoelastic polyurethane pad 11 by a substantially constant width. The outer dimensions of the arch pad 10 are such that the arch part is covered substantially, and the maximum thickness is 3 to 15
mm, especially 5 to 10 mm, is suitable. The required thickness depends on the hardness. For low hardness, the thickness may be thicker, and for high hardness, the thickness may be thinner. Usually, the hardness is from 0 to 30 according to JISA. However, in order to obtain a predetermined effect, it is necessary to select a predetermined hardness, viscoelastic property and thickness according to the symptoms.

The viscoelastic polyurethane which can be used as the material of the viscoelastic polyurethane pad 11 in the present invention may be selected from any known materials. Preferably, a mixture of a high molecular weight polyol and a low molecular weight polyol is used. A polyisocyanate is reacted under an excess of OH to produce an ultra-low hardness polyurethane.
No. 26,330 discloses a blend of poly (1,2-propylene glycol) and N, N, N ', N'-tetrakis (2-hydroxypropyl) ethylenediamine in at least one stoichiometric amount. A polyurethane elastomer reacted with an aromatic isocyanate may be used. This viscoelastic polyurethane is a polyurethane elastomer having a low compression set and a slow recovery from compression, and is a material suitable for the purpose of the present invention. Further, in order to improve the temperature-dependent energy absorption (impact attenuation), a viscoelastic polyurethane described in JP-A-61-19618 to which a monohydric alcohol component is further added may be used. In this case, the polyol and isocyanate are reacted in equivalent amounts and do not contain excess hydroxy groups. In any case, the hardness is 0 to 30 according to JIS A,
Feels hard, 0 is soft and easily deformed by external force,
It recovers its original form within a few seconds when the power is removed.

[0007] To use the arch pad 10 of the present invention, the viscoelastic polyurethane pad 11 is turned down, and the cloth 12 is applied to the bottom of the arch of the foot. When walking in this state, the arch pad bends and comes into close contact with the arch bottom surface.
Therefore, there is no problem even if the side contacting the sole is not curved along the arch. Since the viscoelastic polyurethane pad 11 shows a slight adhesiveness, it is hard to be displaced from the position when placed in the shoe. On the other hand, since the fabric 12 is in contact with the foot, a feeling similar to that of a normal insole is obtained.

The arch pad of the present invention is easy to manufacture. Next, the manufacturing method will be described with reference to FIG. 5. A molding machine including a lower mold 13 having a lens-shaped molding cavity 15 for receiving a raw material for viscoelastic polyurethane and an upper mold 14 having a flat bottom surface is described. use. A predetermined amount of the raw material measured in advance is charged into the molding cavity 15, and the cloth 12 is put thereon. The upper and lower molds 13 and 14 are closed, and the molds are heated to a predetermined temperature and held for a predetermined time. As a result, crosslinking occurs, and an arch pad in which the desired viscoelastic polyurethane pad 11 and fabric 12 are completely integrated is obtained. Further, since the molding cavity is provided in the lower mold, the molding operation is much easier than in the case where the cavity is formed in the upper mold.

[0009]

As described above, unlike the conventional arch pad, the arch pad of the present invention comes in contact with the entire arch portion, so that its position can be easily determined. Due to its high adhesiveness, it is hard to shift from its position when placed above and below the insole. Therefore, the arch pad of the present invention can be easily used by anyone. According to the structure of the present invention, the manufacture of the arch pad is easy and suitable for mass production. In use, a part of the pad can be freely cut and thinned according to the symptoms of the user.

[Brief description of the drawings]

FIG. 1 is a bottom view of the arch pad of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a bottom view comparing a conventional arch pad with the arch pad of the present invention.

FIG. 5 is a cross-sectional view illustrating a method of manufacturing the arch pad of the present invention.

[Explanation of symbols]

 10: Arch pad 11: Viscoelastic polyurethane pad 12: Fabric 13, 14: Die 15: Mold cavity

Claims (2)

(57) [Scope of request for utility model registration] 1. A flat fabric having a shape that almost completely covers a horizontal arch and a vertical arch (inside and outside) of a sole and has a contour formed with rounded corners, and is integrally formed on the back surface of the fabric. A double-shaft arch pad, comprising a viscoelastic polyurethane resin pad bonded thereto, wherein the lower surface of the arch pad has a convex lens-like curved surface. 2. The double-shaft arch pad according to claim 1, wherein the outer dimensions of the fabric are larger than the outer dimensions of the viscoelastic body.