JP4914174B2 - Shanks and shoes for built-in shoes - Google Patents

Description

  The present invention relates to a breathable shank built into a shoe and a shoe incorporating a breathable shank.

Conventionally, shoes equipped with a shank are known. A shank is a part provided on the arch part of the shoe sole, and is provided to prevent deformation of the shoe by reinforcing the arch part or to reduce fatigue during walking due to deformation of the shoe, etc. (Patent Document 1).
The shank generally supports a load by the rigidity of the member, and a steel plate is often used in many cases. In addition, it is desirable to have a vent hole to the outside because the inside of the shoe is easily stuffy, but if it is necessary to provide a vent in the arch part, in the case of a shoe provided with a shank, the shank is in the way It was not possible to provide a vent.
JP 2002-262903 A

  In addition to the prior art, there is a method in which one piece of a substantially rectangular shank is placed on both sides of the vent hole provided in the arch, but this not only increases the number of parts, but also the shoe sole Twist was allowed in the direction, and when the twist occurred, the corner portion of the shank could pierce the shoe sole and damage the inside of the shoe sole.

  The present invention has been invented in view of the above-described problems, and is made of a synthetic resin, so that it is lighter than a metal one, has no corrosion due to sweat, water, etc., and has a highly rigid and breathable shank. An object is to provide a shoe with a built-in shank.

In order to solve the above problems, the invention according to claim 1 of the present application has the following configuration. That is,
A shank with built-in shoes used for shoes that do not have a ground contact surface with the floor surface near the arch,
A plate-like portion long in the front-rear direction, a cylindrical portion having a long elliptical hole protruding in the front-rear direction protruding from the lower surface of the plate-like portion, and the plate-like portion in which one eye is formed as an opening of 1 mm square or less A net integrally provided on the upper surface,
The overall length of the plate-shaped portion is at least as long as the total length of the portion of the arch area where the ground contact surface is not provided, and has an elliptical outer shape formed integrally with the plate-shaped portion. A shoe-embedded shank, wherein the tubular portion having a lip acts as a rib that prevents deformation of the plate-like portion.

  Moreover, in order to solve the said subject, invention of Claim 2 of this application has the following structure. That is, the plate-like portion has an elliptical shape that is long in the front-rear direction.

Moreover, in order to solve the said subject, invention of Claim 3 of this application has the following structure. That is,
A shoe that does not have a ground contact surface near the arch,
A shoe sole having an elliptical hole penetrating up and down in the vicinity of the arch of the shoe, an upper body having a breathable insole provided on the shoe sole, and an intermediate between the shoe sole and the upper body Has a shank provided in the
The shank has a plate-like portion that is long in the front-rear direction, a cylindrical portion that has a long oval-shaped outer shape that protrudes from the lower surface of the plate-like portion, and an opening size of one eye is 1 mm square or less. A net integrally provided on the upper surface of the plate-like portion;
The overall length of the plate-shaped portion is at least as long as the total length of the portion of the arch area where the ground contact surface is not provided, and has an elliptical outer shape formed integrally with the plate-shaped portion. A shoe having a cylindrical portion acting as a rib that prevents deformation of the plate-like portion.

  Moreover, in order to solve the said subject, invention of Claim 4 of this application has the following structure. The shoe according to claim 3, wherein the plate-like portion of the shank has an elliptical shape that is long in the front-rear direction.

Although the shank according to the present invention is made of synthetic resin and is lightweight, it has rigidity necessary for preventing deformation of the shoe and has a ventilation function leading to the inside of the shoe. . Therefore, it is possible to reduce the overall weight of the shoe and improve the breathability, and as a shoe that women can use for a long time in the field of nursing care, etc., a shoe that realizes light weight, reduced fatigue, and maintaining comfort by ensuring breathability. It has the effect that can be formed.
In addition, the shoe according to the present invention can realize lightness, fatigue reduction, comfort maintenance by ensuring air permeability, and the like by providing the above-described shank.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a shoe 1 using the present invention. The shoe 1 is mainly composed of an upper portion 2 and a shoe bottom portion 3. The shoes 1 are shoes that are assumed to be used in the fields of medical care and nursing care. Since the shoes 1 involve work in a standing state and frequent walking, the inside of the shoes 1 is caused by sweating by the user. It is placed in a very sultry environment.
The upper portion 2 is mainly composed of an upper body 4 that covers from the ankle to the instep and an insole 5 that closes the bottom surface of the upper body 4. The upper part 2 uses a shoe mold (not shown) prepared for each foot size of synthetic leather, mesh cloth, etc. cut into a predetermined shape constituting the upper body 4 and the insole 5 Then, the shape is determined, and the bag is three-dimensionally formed by joining by sewing or adhesion. An insole 18 called a cup insole is mounted in the upper portion 2.

The shoe sole portion 3 has an outsole 6 that is in direct contact with the floor surface during walking, and a midsole 7 provided between the outsole 6 and an insole 5 that constitutes the bottom surface of the upper portion 2. The outsole 6 is a thin plate body formed by rubber molding in which a plurality of grounding blocks 8 having a rectangular grounding surface shape are mainly provided on the back surface (see FIG. 3a). The outsole 6 is divided into areas of a forefoot bottom 9, an arch part 10, and a heel part 11 extending from the tip to a substantially intermediate part. The grounding block 8 is provided on the forefoot bottom part 9 and the heel part 11 excluding the arch part 10. It is provided in an array.
The arch portion 10 of the outsole 6 is formed to be narrower than the width of the front foot bottom portion 9 and the heel portion 11, and an elliptical hole 12 that is long in the front-rear direction is provided in the portion. The hole 12 communicates with an elliptical hole 13 formed in the midsole 7 described later in detail.

The midsole 7 is formed of a foaming synthetic resin called EVA that is lightweight and elastic. The midsole 7 has a thick heel portion and a thin forefoot sole portion, and the above-described hole 13 penetrating vertically is provided in the arch portion. The shape of the hole 13 is an elliptical shape that is long in the front-rear direction (see FIG. 3b), and the opening area on the upper surface side is smaller than the opening area on the lower surface side. In addition, a recess 19 for mounting a shank 14 described later in detail is formed on the outer periphery of the opening on the upper surface side of the hole 13. A peripheral wall 16 is provided around the upper outer periphery of the midsole 7 so as to wrap around the outer periphery of the lower end of the upper portion 2. The inner surface of the peripheral wall 16 and the upper surface of the midsole 7 are joined to the upper body 4 by an adhesive.
Further, in the present embodiment, a plurality of small holes 17 penetrating front and back are provided in the arch portion of the insole 5 to ensure air permeability. The small hole 17 is provided at a position substantially coinciding with the opening of the hole 13 formed in the midsole 7.

Between the upper surface of the midsole 7 and the upper portion 3, a shank 14 having a structure shown in FIG. 2a (bottom view), FIG. 2b (plan view), FIG. 2c (side sectional view), and FIG. Is provided.
The shank 14 has a flange-shaped disk 20 (plate-shaped part) having an elliptical outer shape, and a cylindrical part 21 protruding downward from the center of the lower surface of the disk 20, and the upper surface of the disk 20. A resin net 22 is provided integrally with the disc 20, and the disc 20 is bonded into the recess 19 via an adhesive, and the cylindrical portion 21 is fitted to the upper edge of the hole 13. It is fixed to the midsole.
The total length of the disk 20 is about 50 mm, the total width is about 30 mm, and the thickness is about 2 mm. Moreover, the opening shape of the cylindrical part 21 provided in the center is an elliptical shape having a longitudinal direction of about 28 mm and a width of about 6 mm, the thickness of the cylindrical outer peripheral wall part is about 1.5 mm, and the disk 20 The protruding height from the bottom surface is about 2 mm. The mesh 22 on the upper surface of the disk 20 is formed of a synthetic resin thread having a thin wire diameter, and is integrated with the mesh when the shank 14 is injection-molded using a molding die. The size of the mesh is such that one side is 1 mm square or less and has air permeability. The net 22 has a function of preventing the passage of foreign matters having a size of about the size of sand particles. Moreover, since the net | network 22 is resin as mentioned above, even if it is the conditions through which the steamed air in shoes passes, a water | moisture content does not adhere and corrode. Furthermore, since the shank 14 is also made of resin, there is no need to separate it from the net 22 when the shank 14 is discarded.

In the case of a shoe that does not have a ground contact surface on the arch, there is naturally no portion that supports the arch on the sole. Therefore, in general, a reinforcing member called a shank is arranged on the arch portion so that the bending does not occur more than necessary. The shank according to the present invention is a molded product formed of a synthetic resin for the purpose of weight reduction, but has an appropriate strength as a shank and has a hole for ventilating the shoe. .
As described above, the shank has the disk 20 as a long plate-like portion having a total length of about 50 mm, a total width of about 30 mm, and a thickness of about 2 mm. However, it is not possible to receive a load during walking with only the thin disc made of synthetic resin and to appropriately prevent deformation of the arch. Therefore, the shank according to the present invention is provided with a cylindrical portion having an elliptical shape that is long in the front-rear direction (longitudinal direction) on the lower surface of the disc, and the cylindrical portion acts as a rib for preventing deformation. Further, the tubular portion is used as a ventilation port that leads to the inside of the shoe.
As described above, the shank according to the present invention has a moderate elasticity and strength as a shank while being made of a lightweight synthetic resin, and further has air permeability. Moreover, the shoes provided with the shank can realize weight reduction, prevent deformation of the arch portion, and have air permeability.
Moreover, by making the shank according to the present invention into an elliptical shape, it is possible to cope with not only the bending of the shoe sole in the front-rear direction but also the bending in the left-right direction and the oblique direction during walking. Moreover, since the outer periphery of the shank has an elliptical shape, there are no corners on the outer periphery, so that the shank does not damage the midsole even when the shoe sole is bent.

The present invention is applicable to a shank used for a shoe and a shoe using the shank.

It is sectional drawing of the shoe which concerns on this invention. It is explanatory drawing of the shank which concerns on this invention. It is explanatory drawing of the outsole and midsole used for the shoes which concern on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shoes 2 Upper part 3 Shoe bottom part 4 Upper body 5 Middle sole 6 Outsole 7 Midsole 8 Grounding block 9 Forefoot bottom part 10 arch part 11 Saddle part 12 Hole 13 Hole 14 Shank 16 Perimeter wall 17 Small hole 18 Insole 19 Recess 20 Disc 21 cylindrical part 22 net

Claims (4)

A shank with built-in shoes used for shoes that do not have a ground contact surface with the floor surface near the arch,
A plate-like portion long in the front-rear direction, a cylindrical portion having a long elliptical hole protruding in the front-rear direction protruding from the lower surface of the plate-like portion, and the plate-like portion in which one eye is formed as an opening of 1 mm square or less A net integrally provided on the upper surface,
The overall length of the plate-shaped portion is at least as long as the total length of the portion of the arch area where the ground contact surface is not provided, and has an elliptical outer shape formed integrally with the plate-shaped portion. A shoe-embedded shank, wherein the tubular portion having a lip acts as a rib that prevents deformation of the plate-like portion.   The shank for incorporating shoes according to claim 1, wherein the plate-like portion has an elliptical shape that is long in the front-rear direction. A shoe that does not have a ground contact surface near the arch,
A shoe sole having an elliptical hole penetrating up and down in the vicinity of the arch of the shoe, an upper body having a breathable insole provided on the shoe sole, and an intermediate between the shoe sole and the upper body Has a shank provided in the
The shank has a plate-like portion that is long in the front-rear direction, a cylindrical portion that has a long oval-shaped outer shape that protrudes from the lower surface of the plate-like portion, and an opening size of one eye is 1 mm square or less. A net integrally provided on the upper surface of the plate-like portion;
The overall length of the plate-shaped portion is at least as long as the total length of the portion of the arch area where the ground contact surface is not provided, and has an elliptical outer shape formed integrally with the plate-shaped portion. A shoe having a cylindrical portion acting as a rib that prevents deformation of the plate-like portion.   The shoe according to claim 3, wherein the plate-like portion of the shank has an elliptical shape that is long in the front-rear direction.

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