JP3143815U - Thermoformed shoe insoles - Google Patents

Abstract

In an insole for thermoformed shoes, thermal deformation of a thermally deformable layer member having characteristics of suppressing thermal deformation due to wearing over a long period of time, keeping the balance of a foot neutral, and softening at a temperature at the time of thermoforming. Provided is an insole for thermoformed shoes that is improved and has improved thermoformability.
A base layer member 2 made of a resin having a characteristic that does not soften at a temperature at the time of thermoforming in a thermoformed shoe insole, and a temperature at the time of thermoforming The heat deformation layer member 3 is made of a resin having a softening property and laminated on the upper surface of the base layer member 2, and a plurality of holes 30 for improving heat conduction are formed in the heat deformation layer member 3.
[Selection] Figure 1

Description

  The present invention relates to a thermoformed shoe insole that is thermoformed into a shape along a user's foot shape.

  2. Description of the Related Art Conventionally, thermoformed shoe insoles are known that are made of a resin material having thermoplasticity and are molded by pressing a user's foot while being softened by heating (see, for example, Patent Documents 1 to 5). ). This type of thermoformed shoe insole is molded into a shape that conforms to the foot shape of each user and can store the shape, so that the balance of the foot can be kept neutral.

Japanese Patent Laid-Open No. 5-4005 JP-A-5-199906 JP-A-8-289805 JP 2000-33002 A JP 2000-31603 A

  In the insole for thermoformed shoes shown in Patent Document 1 to Patent Document 5 described above, since the members forming the foot shape are all made of a uniform thermoplastic resin (thermo material), the user's foot shape is memorized by thermoforming. However, when it is worn for a long time, the body weight is applied while being heated by the user's body temperature, so that further thermal deformation proceeds, making it difficult to keep the foot balance neutral.

  Therefore, the present inventor has succeeded in developing an insole for thermoformed shoes that can suppress thermal deformation due to wearing over a long period of time in order to solve the above-described problems (Utility Model Registration No. 3092522). .

  The present invention relates to an improvement of the above-described thermoformed shoe insole, and in the thermoformed shoe insole, the thermal deformation due to wearing over a long time is suppressed, and the balance of the foot is kept neutral, and at the time of thermoforming The object is to improve the heat conduction of the heat-deformable layer member having the property of softening with temperature and to improve the thermoformability.

  In order to achieve the above object, the invention of claim 1 is made of a resin material having thermoplasticity, and is softened by heating from the outside while being worn in the shoe, and in that state, the user's foot is placed in the shoe. Insole for thermoformed shoes that is thermoformed into a shape that conforms to the user's foot shape by putting weight on, and made of a resin that does not soften at the temperature at the time of the thermoforming, The heat-deformable layer is composed of a base layer member that is molded together and a heat-deformable layer member that is made of a resin that softens at a temperature during the thermoforming and is laminated on the upper surface of the base-layer member. It is characterized in that a large number of holes for improving heat conduction are formed in the member.

  The invention of claim 2 sets the size of the hole formed in the thermally deformable layer member according to claim 1 to a diameter of about 1 mm, and the hole is arranged in the vertical direction from the toe portion to the heel portion. In addition, the distance between the continuous holes is set to about 7 mm, and the distance between the continuous holes in the diagonally forward / backward / left / right directions is set to about 5 mm.

  In this configuration, the heat deformable layer member is thermoformed to create an insole along each user's foot shape. Here, since the base layer member is pre-molded into a standard foot shape, the thickness of the heat-deformable layer member is finely adjusted from the standard foot shape to the user's foot shape from the standard foot shape. Just enough to do it. The thermoforming is performed in shoes, and at that time, the base layer member is not thermally deformed and the standard foot shape is maintained, while the heat deformable layer member is thermally deformed and the surface thereof is The shape matches the user's foot shape. Moreover, the insole worn for a long time is heated by a user's body temperature. In this case, the thermal deformation layer member undergoes some thermal deformation according to how the user's weight is applied (load distribution), but the base layer member does not undergo thermal deformation. Therefore, thermal deformation is caused only by the thermal deformation layer member due to the user's body temperature, and large thermal deformation does not occur on the upper surface of the insole. Furthermore, by forming a large number of holes for improving heat conduction in the heat-deformable layer member, the thermoformability of the heat-deformable layer member at the time of thermoforming is improved.

  As described above, according to the insole for thermoformed shoes according to the present invention, the thermoformed layer member made of a resin softened at the time of thermoforming is made of a resin that does not soften at the temperature at the time of thermoforming. Since it is laminated | stacked on the upper surface of the base layer member currently shape | molded together, even if it wears for a long time, a big thermal deformation does not arise with body temperature. Therefore, not only the foot type of the user is stored, but the foot type on the upper surface of the insole is not greatly deviated from the standard foot type even after long-term use, and the user can keep the balance of the foot neutral. In addition, a large number of holes formed in the heat-deformable layer member improve the heat conduction of the heat-deformable layer member during thermoforming, so the time required for thermoforming can be shortened compared to the conventional method, and custom-made insoles can be formed. Becomes easier.

  Hereinafter, a thermoformed shoe insole according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2, a thermoformed shoe insole 1 is an insole that is attached to ski shoes, sports shoes, and the like and is thermoformed into a shape that conforms to a user's foot shape. It is comprised by the heat deformation layer member 3 laminated | stacked on the upper surface. The base layer member 2 and the heat-deformable layer member 3 are made of foamed resin so as to be able to absorb the impact on the soles during movement. The illustrated thermoformed shoe insole 1 is for the right foot. This insole 1 for thermoformed shoes is softened to the heat-deformable layer member 3 by heating from the outside while being worn in the shoe, and in that state, the user puts his foot in the shoe and puts his weight on the shoe Thermoformed into a shape along the user's foot shape. The temperature at the time of thermoforming is set to a temperature at which the user does not get burned during molding, for example, 50 ° C to 70 ° C.

  The base layer member 2 is made of a thermoplastic resin having a characteristic that does not soften at the temperature at the time of thermoforming, and is molded according to a standard foot shape in advance. Examples of the material of the base layer member 2 include EVA (ethylene vinyl acetate copolymer). The softening temperature of this EVA depends on the vinyl acetate content, and when the vinyl acetate content decreases, the softening temperature tends to increase. Therefore, by adjusting the content of vinyl acetate, the softening point of the base layer member 2 can be made higher than the temperature at the time of thermoforming. In addition, in the standard foot shape, for example, as shown in FIGS. 1 and 2, the toe portion 20 is thin with respect to the heel portion 22, and the raised arch portion 21 and the flat heel portion 22 are formed. Consists of. Also, an arch shape provided to correct the user's foot shape to a healthy foot shape, for example, a vertical arch with a raised central portion in the front-rear direction of the sole, and a lateral ridge with a raised central portion in the inside and outside of the foot This includes arches. With such a standard foot shape, the user's foot shape is corrected to a healthy foot shape, and the balance of the foot is kept neutral.

  The heat-deformable layer member 3 is a sheet-like member made of a thermoplastic resin (thermo material) having a characteristic of softening at a temperature at the time of thermoforming. For example, the softening temperature is lowered by increasing the amount of vinyl acetate. EVA may be used, and is laminated and adhered to the upper surface of the base layer member 2 in the direction of the arrow. The upper surface of the base layer member 2 follows the shape of the heat-deformable layer member 3, and therefore, the upper surface of the thermoformed shoe insole 1 before thermoforming has a standard foot shape.

As shown in FIGS. 1 and 2, the heat-deformable layer member 3 has a large number of holes 30 that improve heat conduction.
Here, the size of the hole 30 formed in the thermally deformable layer member 3 is preferably set within a range of 0.8 mm to 1.2 mm in diameter, for example, about 1 mm. In addition, as shown in FIG. 4, the holes 30 are arranged such that the interval between the holes 30 that are continuous in the vertical direction from the toe portion 20 to the flange portion 22 is set to about 7 mm, and is continuous in the oblique lateral directions of front, rear, left, and right. It is preferable to set the interval between the holes 30 to about 5 mm.

  A procedure of thermoforming the insole 1 for thermoformed shoes having the above configuration will be described with reference to FIG. First, the thermoformed shoe insole 1 is cut in accordance with the size and shape of the shoe 5 of the user and inserted into the shoe 5. Then, warm air is fed into the shoe 5 using the hair drying dryer 6 after washing the hair (for example, the conventional power is 1000 W for 3 to 5 minutes). It is heated to a temperature that does not cause burns. At this time, since a large number of holes 30 for improving heat conduction are formed in the heat-deformable layer member 3, the time required for heating can be shortened as compared with the conventional case. When the user's foot is quickly inserted into the shoe 6 and the weight is applied after the thermoformed shoe insole 1 is heated, the thermoformed shoe insole 1 is thermoformed into the foot shape of the user. In this way, the time required for thermoforming can be shortened compared to the prior art, and custom-made insoles can be easily molded.

  Here, since the base layer member 2 is made of a resin that does not soften at the temperature at the time of thermoforming, thermal deformation does not occur and a standard foot shape is maintained. On the other hand, since the heat-deformable layer member 3 is made of a resin having a characteristic of softening at the temperature at the time of thermoforming, the heat-deformable layer member 3 is thermally deformed, and on the surface thereof, as shown in FIG. The user's foot mold 31 is molded.

  By the way, when the thermoformed shoe insole 1 molded in this way is worn for a long time, the thermoformed shoe insole 1 is heated to a temperature substantially equal to the temperature at the time of thermoforming by the body temperature of the user. Sometimes. In this case, the thermal deformation layer member 3 undergoes some thermal deformation depending on how the user's weight is applied (load distribution), but no thermal deformation occurs in the base layer member 2 having a shape that maintains the balance of the foot. . Therefore, thermal deformation is caused only by the thin thermal deformation layer member 3 depending on the user's body temperature, and no large thermal deformation occurs on the upper surface of the thermoformed shoe insole 1. As a result, the foot mold 31 on the upper surface of the thermoformed shoe insole 1 is greatly deviated from the standard foot mold and is not thermally deformed. Therefore, according to the thermoformed shoe insole 1, not only the user's foot shape is memorized but also the user's foot shape is corrected by the standard foot shape on the upper surface of the thermoformed shoe insole 1 even after long-term use. The balance of the feet can be kept neutral.

  The present invention can be variously modified without being limited to the configuration of the above embodiment. For example, the material of the base layer member 2 is not limited to EVA, and other resins may be applied. Moreover, you may make it use heating means other than the dryer 6, for example, heating appliances, such as a stove, for the heating of the insole 1 for thermoforming shoes. Moreover, a thin fabric or leather may be laminated on the upper and lower surfaces of the thermoformed shoe insole 1 as necessary.

It is a disassembled perspective view which shows an example of the insole for thermoforming shoes which concerns on this invention. It is a side view of the insole shown in FIG. It is explanatory drawing which showed a mode that the insole shown in FIG. 1 was heated. It is a top view which shows the state shape | molded so that the insole shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insole for thermoforming shoes 2 Base layer member 20 Toe part 21 Arch part 22 Saddle part 3 Thermal deformation layer member 30 Hole 31 Foot type 5 Shoes 6 Dryer

Claims (2)

It is made of a resin material having thermoplasticity, and is softened by heating from the outside in a state where it is worn in the shoe, and in accordance with the foot shape of the user by putting the user's foot in the shoe and applying the weight. A thermoformed shoe insole that is thermoformed into a shape, comprising a base layer member made of a resin having a characteristic that does not soften at the temperature at the time of the thermoforming, and molded in advance to a standard foot shape, and the thermoforming It is made of a resin that has a property of softening at a certain temperature, and is composed of a heat-deformable layer member laminated on the upper surface of the base layer member, and a plurality of holes that improve heat conduction are formed in the heat-deformable layer member Insole for thermoformed shoes. The size of the hole formed in the heat-deformable layer member is set to about 1 mm in diameter, and the arrangement of the holes is set to about 7 mm between the holes that are continuous in the vertical direction from the toe portion to the heel portion. 2. The thermoformed shoe insole according to claim 1, wherein an interval between each of the left and right diagonally continuous holes is set to about 5 mm.