JP2001299408A - Insole for shoe and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insole for shoe which is easy to fit to the foot of a user. SOLUTION: A layer 2 comprising a cork sheet is inserted between a front surface layer 1 comprising a leather sheet and a rear surface layer 3 comprising a synthetic resin. Therefore as the shoes are worn longer, the cork sheet deforms into an uneven shape in a manner to be adjusted to the shape of the foot sole of a user. Thus, the insole is well fitted to the foot, and the user can feel a well fitted feeling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe insole and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, shoe insoles made of only a plate-shaped synthetic resin, those made by laminating a surface layer made of a leather sheet on a back layer made of a plate-shaped synthetic resin, and the like are known. is there.

[0003]

By the way, the insole of the shoe is generally used when the shoe does not fit the user's foot.
It is laid and used on the upper surface of the midsole of the shoe.
However, in the conventional insole, as described above, it is composed of only a plate-shaped synthetic resin, or a laminate formed by laminating a surface layer made of a leather sheet on a back surface layer made of a plate-shaped synthetic resin. Therefore, there is a problem that it is difficult to fit into the user's feet and a sufficient fit cannot be obtained.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a shoe insole which can be easily adapted to a user's foot and has a sufficient fit, and a method of manufacturing the same.

[0005]

According to a first aspect of the present invention, there is provided a shoe insole according to the present invention, wherein a cork is provided between a surface layer made of a leather sheet and a back layer made of a synthetic resin. It is characterized in that a layer made of a plate is interposed.

According to a second aspect of the present invention, there is provided a shoe insole according to the first aspect, wherein the back surface layer is made of urethane resin.

According to a third aspect of the present invention, there is provided a method for manufacturing a shoe insole according to the present invention, comprising cutting a cork plate having a predetermined shape from a material obtained by slicing a granular cork material with a resin into a plate shape; A synthetic resin material is poured into a step of attaching a leather sheet to the upper surface of the cork board cut by the above and setting the upper mold with the cork board on which the leather sheet is laminated by the above step. Fixing the synthetic resin material to the lower surface of the cork plate in accordance with the lower mold.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a shoe insole according to the third aspect, wherein the synthetic resin material poured into the lower mold comprises a urethane resin material, The urethane resin material is foamed and fixed to the lower surface of the cork plate.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a sectional view showing a shoe insole according to an embodiment of the present invention. As shown in FIG.
It is formed to have a three-layer structure including an intermediate layer 2 and a back layer 3.

The surface layer 1 is formed of a thin sheet made of natural leather or artificial leather. Middle layer 2
Is constituted by a cork plate formed by a forming method described later. The back layer 3 is, as in the present embodiment,
Although it is preferable to be composed of a urethane resin, it may be composed of another synthetic resin.

The insole having the above structure is used by being laid on the upper surface of the midsole of the shoe. And according to this insole,
Since the surface in contact with the sole of the foot is covered with the surface layer 1 made of a leather sheet, the tactile sensation when wearing shoes is good. Further, since the cork plate constituting the intermediate layer 2 is not exposed to the outside by the surface layer 1, no small pieces of cork are lost from the cork plate due to friction with the soles. Further, a layer 2 made of a cork plate is provided between the surface layer 1 and the back layer 3.
As shown in FIGS. 2 (a) and 2 (b), the more the shoes are put in, the more the cork plate is undulated so as to conform to the shape of the sole of the user. Because it deforms, it fits well into the foot and can give the user a sufficient fit.

Next, a method for manufacturing a shoe insole according to the present embodiment will be described with reference to FIG. First, a cork plate 2a having a predetermined shape is cut from a material obtained by slicing a granular cork material solidified with a resin into a plate shape. That is, as a cork material, a granular material having a maximum particle size of about 6 mm is used, and a resin as a binder is mixed into the cork material.
The mixture obtained by stirring and mixing at a high temperature of not lower than a certain degree is poured into an iron frame, pressed and cooled at room temperature. After a certain period of time, when the granular cork materials are combined and solidified by the resin as the binder, they are sliced into a plate shape. Then, as shown in FIG. 3A, a cork plate 2a of a predetermined shape constituting the intermediate layer 2 is punched out from the sliced plate-shaped material 20 and cut.

Next, as shown in FIG. 3 (b), a leather sheet 1a constituting the surface layer 1 is adhered to the upper surface of the cork board 2a with an adhesive or the like. As the leather sheet 1a, a sheet obtained by cutting a thin sheet made of natural leather or artificial leather into a size substantially equal to the inner sole of the shoe as described above can be used. Then, when the leather sheet 1a is attached and laminated on the upper surface of the cork board 2a, this is shown in FIG.
As shown in (1), the upper mold 4 is set by inserting it into the pins 4a provided on the upper mold 4.

Next, as shown in FIG. 3D, a liquid urethane resin material 3a is poured into a concave portion formed inside the lower mold 5 used as a pair with the upper mold 4 described above. Then, as shown in FIG. 3 (e), the lower mold 5 into which the liquid urethane resin material 3a has been poured is subjected to the above-described steps,
The upper mold 4 on which the cork plate 2a on which the leather sheets 1a are laminated is set.

Next, as shown in FIG.
The liquid urethane resin material 3a poured into the container is foamed and fixed to the lower surface of the cork plate 2a. Since the urethane resin material 3a is foamed in this way, the urethane resin material 3a is impregnated so as to enter the gaps between the cork materials constituting the cork plate 2a, so that the urethane resin material 3a and the cork The plate 2a adheres well. For this reason, the cork board 2a is stably held by the urethane resin constituting the backside layer 3 which has been hardened thereafter, without being broken into pieces by use. Also, like this, the cork board 2
Since the urethane resin material 3a enters the gaps between the cork materials constituting the material a, the cork density having unevenness in density can be made constant. Further, in the present embodiment, not only the back surface of the cork plate 2a, but also the periphery thereof is covered with the urethane resin constituting the back surface layer 3 which has been cured thereafter, so that it is possible to prevent the small pieces of cork from being lost from the periphery. A leather sheet 1a in which a urethane resin material 3a constitutes a surface layer 1 around a cork plate 2a
Since it is directly and firmly fixed to the leather sheet, it is possible to prevent the leather sheet 1a from peeling off when used (see FIG. 1). Finally, when the urethane resin material 3a fixed to the lower surface of the cork plate 2a is cured, as shown in FIG. 3 (g), the upper mold 4 and the lower mold 5 are removed to complete the insole.

The insole of the shoe according to the present invention and the method of manufacturing the same are not limited to the above-described embodiment. For example, a portion corresponding to the metatarsal bone of the foot of the layer made of the cork board or the back layer made of the synthetic resin is formed with a thickness, or between the surface layer made of the leather sheet and the layer made of the cork board. A pad may be interposed at the position where the site is located, and the insole may function as a footbed having unevenness on the sole contact surface for correcting hallux valgus or the like. Further, in the heel portion of the insole, a layer made of a cushion material having a shock absorbing power may be interposed between the surface layer and the back layer in place of the layer made of the cork plate.

[0017]

As described above, according to the insole of the present invention, a layer made of a cork plate is interposed between a surface layer made of a leather sheet and a back layer made of a synthetic resin. . Therefore, as the shoes are put on, the cork plate is deformed into an undulating shape so as to conform to the shape of the sole of the user, so that the user can fit the foot well and give a sufficient fit to the user.

Further, according to the method for manufacturing a shoe insole according to the present invention, a step of solidifying a granular cork material with a resin and forming it into a plate shape, and a step of forming a leather sheet on the upper surface of the cork plate formed in the above step. A step of attaching and setting the upper mold, and the upper mold on which the cork board on which the leather sheet is laminated according to the above step is aligned with the lower mold into which the synthetic resin material has been poured, on the lower surface of the cork board, Since the method includes the step of fixing the synthetic resin material, it is possible to manufacture an insole that can be easily adapted to a foot and can give a user a sufficient fit.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an insole of a shoe according to one embodiment of the present invention.

FIG. 2 is a view showing a state after use of the insole of the shoe according to the embodiment, wherein (a) is a plan view and (b) is a sectional view taken along the line AA of (a). is there.

FIG. 3 is a diagram showing a step of manufacturing a shoe insole according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface layer 1a Leather sheet 2 Intermediate layer 2a Cork board 3 Backside layer 3a Urethane resin material

Claims (4)

[Claims] 1. A shoe insole, wherein a layer made of a cork plate is interposed between a surface layer made of a leather sheet and a back layer made of a synthetic resin. 2. An insole according to claim 1, wherein said back layer is made of urethane resin. 3. A step of cutting a cork plate having a predetermined shape from a material obtained by slicing a granular cork material with a resin into a plate shape, and attaching a leather sheet to an upper surface of the cork plate cut in the step. Wearing, setting the upper mold, the upper mold on which the cork board on which the leather sheet is laminated according to the above step is set to the lower mold into which the synthetic resin material has been poured, and the lower surface of the cork board, Fixing a synthetic resin material. 4. The method for manufacturing an insole according to claim 3, wherein the synthetic resin material poured into the lower mold is made of a urethane resin material, and the urethane resin material is foamed on a lower surface of the cork plate. A method for producing a shoe insole, characterized in that it is fixed by sticking.