JP2005130907A - Insole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insole which hardly causes muscle fatigue on feet and leg parts and brings high-grade fitness since being suited to the foot shape of an individual person and tightly fitted even to the inner shape of a shoe reasonably. <P>SOLUTION: This insole 1 is formed by laminating an upper layer 2 made of a shape memory resin for memorizing the foot shape of a person under a prescribed temperature, an intermediate layer 3 for absorbing the deformation of the upper layer 2 and reducing an impact on the foot of the person, and a lower layer 4 deformed so as to be suited to a bottom shape inside the shoe from a surface area 7 adjacent to the sole to a surface area 8 adjacent to the bottom part inside the shoe. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an insole for a shoe that can be inserted into a shoe and adapted to the foot shape of an individual person.

  A shoe insole is manufactured by determining the approximate shape, size and thickness according to the average foot shape of a person, and the purpose of using a shoe insole is to Therefore, it was sufficient to prevent stuffiness, to reduce the shock transmitted to the foot, or to prevent the bad smell in the shoes.

In order to solve such problems, insoles have been developed that use shape memory resins that can memorize individual foot molds as part of the insole material.
Japanese Utility Model Publication No. 2-61202 Japanese Utility Model Publication No. 5-20604 Japanese Utility Model Publication No. 5-20605 Japanese Utility Model Publication No. 7-20808 JP 2003-210204 A

  However, when the shape memory resin is used alone for the insole of the shoe, the elasticity of the part where the thickness of the entire insole is compressed by deformation of the shape memory resin, such as the heel part of the foot and the front step part. There was a problem that it was lowered and the impact transmitted to the foot could not be sufficiently reduced.

  In addition, when a plate-shaped body made of shape memory resin is used for a part of the insole of the shoe, the insole of the shape memory resin plate storing the foot shape of the person is almost unchanged. This time, the shape of the insole and the shape of the bottom of the shoe into which the insole is inserted do not match, resulting in a gap or misalignment between the insole and the inner surface of the shoe. There was a problem of causing muscle fatigue in the legs and legs.

  The present invention has been made in view of the above circumstances, and can be adapted to the foot shape of an individual person and can also be adapted to the internal shape of a shoe. An object of the present invention is to provide an insole of a shoe that improves the insole and adhesion, hardly causes muscle fatigue in the legs and legs, and provides a high degree of fit.

  In order to solve the above problems, the present invention is a shape for storing a human foot shape at a predetermined temperature from a surface area adjacent to the sole to a surface area adjacent to the bottom of the shoe. An upper layer made of a memory resin, an intermediate layer for absorbing deformation of the upper layer and reducing impact on a person's foot, and deformed to match the shape of the bottom of the shoe An insole for a shoe, which is formed by overlapping a lower layer, is provided.

  According to the present invention, since an upper layer made of a shape memory resin capable of storing an individual's foot shape at a predetermined temperature is provided in a surface area adjacent to the human foot sole, In the surface area where the soles come into contact, a surface shape suitable for each individual's foot shape is obtained, there is no gap or misalignment between the insole and the sole, and the shape memory resin itself is predetermined. In order to maintain appropriate flexibility within the thickness range, the insole will not be able to follow the movement of the sole.

  Furthermore, the lower layer of the upper layer is provided with an intermediate layer that absorbs deformation of the upper layer that was flat before use and can reduce the impact on the human foot. The deformation of the upper layer after adapting to the foot shape is hardly transmitted to the area where the intermediate layer and the lower layer are in contact, but in the area where the intermediate layer and the lower layer are in contact, the upper layer Regardless of the presence or absence of deformation, a substantially constant surface shape before use can be maintained. Further, the presence of the intermediate layer can reduce the impact on the human foot and leg during walking.

  In addition, the lower surface of the intermediate layer is provided with a lower layer that can be deformed to match the shape of the bottom of the shoe, so that when the insole is inserted into the shoe, the intermediate layer And the lower layer cooperates and deforms to fit the inner shape of the shoe, there is no gap or misalignment between the insole and the inner surface of the shoe, and the upper layer is shaped like a human foot The state after adaptation can be maintained.

  As described above, according to the present invention, as a result of earnestly examining the structure of the insole composed of the upper layer, the intermediate layer, and the lower layer, and the selection of the material of each layer, the sole of the human foot is obtained by the synergistic effect of each layer. The insole between the shoe and the insole is improved, and a shoe insole that can provide a high degree of fit that is less likely to cause muscle fatigue in the legs and legs can be provided.

  1 is a perspective view showing an insole of a shoe before use in the present invention, FIG. 2 is a cross-sectional view showing a cross section AA in FIG. 1, and FIG. 3 is a cross-sectional view showing a cross section BB in FIG. It is.

  4 is a perspective view showing an insole of a shoe after memorizing a human foot pattern in the present invention, FIG. 5 is a cross-sectional view showing a cross section A′-A ′ of FIG. 4, and FIG. It is sectional drawing which shows B'-B 'cross section.

  As shown in FIGS. 1 to 6, a shoe insole 1 according to the present invention has an upper layer 2, an intermediate layer from a surface area 7 adjacent to a person's sole to a surface area 8 adjacent to the bottom of the shoe. The layer 3 and the lower layer 4 are made of a material having three different characteristics.

  As shown in FIG. 1, the upper layer 2 has a substantially flat initial shape before use, and can store an individual's foot shape at a predetermined temperature (see FIG. 4). Molded from resin.

  The shape memory resin is not particularly limited as long as it can memorize a human foot shape at a predetermined temperature. However, the shape memory resin is preferably softened at a temperature equal to or higher than the body temperature. Thus, it is preferable to use a polyurethane shape memory resin that can memorize a human foot shape.

  Also, on the upper surface side 7 of the upper layer 2, the shape memory resin is heated to prevent burns that occur on the soles of the person when pressing the soles of the person, and the insole 1 is inserted into the shoe. Paste material 5, such as leather, synthetic leather, brushed fabric, non-woven fabric, etc., to prevent slippage between sole and insole 1 and improve contact feeling between soles when used May be.

  Furthermore, the shape memory resin used for the upper layer 2 memorizes a human foot shape in a short time at a predetermined temperature, and after the insole 1 is inserted, the shape memory resin is appropriately deformed following the movement of the sole. Therefore, the thickness is preferably 1 to 3 mm.

  As shown in FIG. 2, the intermediate layer 3 is formed from an elastic material having an appropriate thickness, absorbs an impact force transmitted to a human foot during walking, and stores a human foot shape from a substantially flat shape. It plays the role which absorbs the deformation | transformation of the upper shape memory resin 2 after a long time.

  The elastic material used for the intermediate layer 3 is not particularly limited as long as it has an appropriate cushioning property. In addition to a sponge material made of polyurethane resin, EVA, polystyrene resin or the like, a cork material, non-woven fabric, etc. Can be used.

  In the embodiment of the present invention, a sponge material made of polyurethane resin is applied to the intermediate layer 3 in consideration of the cushioning property, availability, and price.

  The thickness of the elastic material used for the intermediate layer 3 varies depending on the selected material. However, when a sponge material made of polyurethane resin is used for the intermediate layer 3, the impact force to be absorbed and the deformation allowance of the upper layer 2, And considering that the load of the wearer during walking must be supported in a well-balanced manner, it is preferably within a range of 5 to 20 mm (see FIG. 2).

  Furthermore, the intermediate layer 3 must be fixed to the lower surface of the upper layer 2 in such a manner that no deviation occurs between the upper layer 2 and, for example, the lower surface of the upper layer 2 and the upper surface of the intermediate layer 3 are connected to each other. As shown in FIG. 3, the intermediate layer 3 is sandwiched between the upper layer 2 and a lower layer 4 described later, and the upper layer 2 and the lower layer are fixed. The intermediate layer 3 can be fixed to the lower surface of the upper layer 2 by edge stitching or bonding the peripheral edge 6 of 4.

  In the embodiment of the present invention, the bottom layer 4 is shaped so that it envelops the intermediate layer 3 (see FIGS. 2, 3 and 5, 6), and the lower layer 4 is the peripheral edge 6 of the upper layer 2. The insole 1 being joined is shown.

  The intermediate layer 3 thus fixed to the lower surface of the upper layer 2 is further deformed to fit the shape of the bottom of the shoe after the insole 1 is inserted into the shoe. It is possible to maintain the shape of the upper layer 2 in which the foot shape of the person is memorized as it is without causing a gap or a deviation between the inner surface of the upper layer 2.

  Further, when the intermediate layer 3 is fixed to the lower surface of the upper layer 2 by edge sewing or bonding of the peripheral edge portions 6 of the upper layer 2 and the lower layer 4, as shown in FIGS. Since the deformation in the thickness direction of the upper layer 2 is constrained by the lower layer 4 connected to the peripheral edge 6 of the upper layer 2, the deformation of the upper layer 2 storing a human foot shape is brought into contact with the intermediate layer 3 and the lower layer 4. Is not transmitted to the lower layer 4 in other words.

  Therefore, the shape of the lower layer 4 in this case can maintain a substantially constant surface shape regardless of whether or not the upper layer 2 is deformed, and the insole 1 is inserted into the shoe and After being pressed, the intermediate layer 3 is further deformed so as to conform to the shape of the bottom of the shoe, so that the integrity and adhesion between the insole 1 and the inner surface of the shoe can be improved.

  The lower layer 4 is molded from an elastic material such as a synthetic resin and a synthetic rubber having an appropriate thickness as shown in FIG. 1 and is adapted to the internal shape of the shoe in combination with the characteristics of the intermediate layer 3. It is deformed and functions to prevent the insole 1 from slipping or slipping inside the shoe.

  In addition, the lower layer 4 is used to transmit the deformation when matched to the internal shape of the shoe to the intermediate layer 3 as it is or to be connected to the peripheral portion 6 of the upper layer 2 to restrain the deformation in the thickness direction of the intermediate layer 3. Therefore, the thickness is preferably in the range of 1 to 3 mm when made of polyurethane resin.

  However, since the anti-slip effect and flexibility required for the lower layer 4 vary depending on the characteristics of the selected material, the thickness of the lower layer 4 is not limited to the above thickness.

  Furthermore, the lower layer 4 must be fixed to the lower surface of the intermediate layer 3 in such a way that no deviation from the intermediate layer 3 occurs. For example, the lower surface of the intermediate layer 3 is bonded to the upper surface of the lower layer 4. The lower layer 4 is indirectly attached to the intermediate layer 3 by fixing directly using an agent or the like, or as shown in FIG. 3, by sewing or bonding the peripheral edge 6 of the intermediate layer 3 and the upper layer 2. Can be fixed.

  Although not shown in the embodiment of the present invention, the anti-slip function is further enhanced by improving the integrity and adhesion between the insole 1 and the inner surface of the shoe on the lower surface of the lower layer 4. Therefore, it is also effective to provide a non-slip shape such as unevenness.

  Further, the upper layer 2 and the intermediate layer 3 are integrally formed on the upper surface of the sole portion of the shoe from the surface area adjacent to the sole toward the shoe sole, and substantially the shape of the lower layer 4 and By integrating the function with the sole part, a shoe having an insole shape and a function, in which the lower layer 4 is omitted, can be produced.

  Next, the actual usage of the insole 1 of the present invention will be described below.

  The insole 1 has a substantially flat shape as shown in FIG. 1 before use.

  Heat is applied to the insole 1 using a hair dryer or the like until the temperature of the upper layer 2 reaches a predetermined temperature equal to or higher than the body temperature, and the sole of the person is pressed against it.

  The time required to memorize and fix the shape of a person's sole is about 3 minutes.

  At this time, the upper layer 2 made of a shape memory resin is deformed so as to memorize the shape of the sole of the person, and the intermediate layer 3 is deformed to absorb the deformation of the upper layer 2. Is not transmitted to the lower layer 4.

  Therefore, the lower layer 4 can maintain a substantially flat initial shape even after the upper layer 2 memorizes the human foot shape (see FIGS. 5 and 6).

  The upper layer 2 made of shape memory resin may be heated to, for example, about 60 ° C., but even in this case, the surface temperature of the upper layer 2 is instantaneously cooled to about 40 ° C. It is safe without causing burns on the back.

  Furthermore, when leather, synthetic leather, brushed fabric, non-woven fabric or other fabric material 5 is attached to the upper surface side 7 of the upper layer 2, not only the contact feeling of the sole is improved but also the surface cooling effect of the previous layer. In order to improve, it is more effective in protecting the soles of people from burns.

  In addition, what is necessary is just to heat the upper layer 2 of the insole 1 to a predetermined temperature (40-60 degreeC) again, when returning the memorize | stored shape of a person's sole to the original initial shape.

  Therefore, the insole 1 in the present invention is not a so-called disposable insole, and has resilience and durability that can be adapted to an individual's foot shape any number of times.

  The insole 2 in which the human foot pattern is stored in this way is then inserted into the shoe.

  The bottom shape in the shoe has various shapes depending on the type of the shoe, but the lower layer 4 is formed from an elastic material such as a synthetic resin or synthetic rubber having an appropriate thickness. And the deformation is absorbed by the intermediate layer 3.

  That is, the lower layer 4 is deformed so as to match the shape of the bottom of the shoe in combination with the characteristics of the intermediate layer 3, and the insole 1 is greatly prevented from slipping or slipping inside the shoe. Useful.

  Further, when the lower surface of the lower layer 4 is provided with a non-slip shape such as irregularities, the anti-slip and slip prevention functions between the insole 1 and the inner surface of the shoe are enhanced, and the insole 1 and the inner surface of the shoe are Unity and adhesion can be further enhanced.

  In addition, about the usage method of the shoes which substantially omitted the lower layer 4 and formed the insole 1 integrally with the sole portion of the shoe, there is no need to insert the insole 1 into the shoe, The foot type of the person can be stored in the sole part of the shoe by the use method described for the insole 1.

  As described above, according to the present invention, since the shape memory resin of the upper layer 2 stores the shape suitable for the foot shape of each person, the foot does not slip or slide on the insole 1, High adhesion between the sole of the foot and the insole 1 is obtained.

  In addition, after memorizing the human foot shape, the upper layer 2 maintains an appropriate hardness and the shape of the peripheral edge portion 6, so that the insole 1 is not displaced or broken in the shoe. Moreover, the position maintenance stability of the insole 1 in shoes can also be improved.

  Since the intermediate layer 3 absorbs deformation of the upper layer 2 and the lower layer 4, it guarantees adhesion between the upper layer 2 and the sole of the person and prevention of deviation (adhesion) between the lower layer 4 and the inside of the shoe. Furthermore, the flexibility and elasticity inherently possessed by the mid layer 3 reduce the impact on the human foot that occurs during walking and the like, thereby providing a natural comfort.

  Further, since the lower layer 4 is formed from a material that is not slippery and has elasticity such as a synthetic resin and a synthetic rubber, the insole 1 is adapted to the inner shape of the shoe and is in close contact with the insole 1. It effectively prevents slipping and slipping in the shoes.

  As a result, according to the present invention, due to the synergistic effect of the upper layer 2, the intermediate layer 3 and the lower layer 4 having different characteristics, the adhesion between the human sole and the insole 1 is improved, and the foot and leg It is possible to provide an insole for a shoe that has a high degree of fit and is less likely to cause muscle fatigue.

It is a perspective view which shows the insole of the shoes before use in this invention. It is sectional drawing which shows the AA cross section in FIG. It is sectional drawing which shows the BB cross section in FIG. It is a perspective view which shows the insole of the shoe after memorize | stored the human foot type | mold in this invention. It is sectional drawing which shows the A'-A 'cross section in FIG. It is sectional drawing which shows the B'-B 'cross section in FIG.

Explanation of symbols

1 Shoe insole 2 Upper layer (shape memory resin)
3 Middle layer 4 Lower layer 5 Insole surface material 6 Peripheral part 7 Upper surface side (foot side)
8 Lower side (shoe bottom side)

Claims (13)

  From the surface area adjacent to the sole to the surface area adjacent to the bottom of the shoe, formed from an upper layer made of shape memory resin, an intermediate layer made of elastic material, and a lower layer made of elastic material Insole of shoes characterized by being.   From the surface area adjacent to the sole to the surface area adjacent to the bottom of the shoe, an upper layer made of a shape memory resin for storing a human foot shape at a predetermined temperature, the upper layer being deformed Absorbing and reducing the impact on a person's foot, and a lower layer that is deformed to fit the shape of the bottom of the shoe is formed by overlapping Insole with a three-layer structure.   The insole for a shoe according to claim 1 or 2, wherein the lower layer has a boat bottom shape so as to wrap around the intermediate layer, and the lower layer is joined at a peripheral edge of the upper layer.   The insole for a shoe according to any one of claims 1 to 3, wherein the upper layer is a polyurethane shape memory resin.   The insole for shoes according to any one of claims 1 to 4, wherein the intermediate layer is selected from a natural elastic material such as synthetic resin and cork.   The insole for shoes according to any one of claims 1 to 5, wherein the lower layer is selected from a synthetic resin and an elastic material such as a cloth material.   The insole for a shoe according to any one of claims 1 to 6, wherein the upper layer has a thickness of 1 to 3 mm.   The insole for a shoe according to any one of claims 1 to 7, wherein the intermediate layer has a thickness of 5 to 20 mm.   The insole for shoes according to any one of claims 1 to 8, wherein the lower layer has a thickness of 1 to 3 mm.   The insole for a shoe according to any one of claims 1 to 9, wherein leather, synthetic leather, raised fabric, non-woven fabric and other fabric materials are in contact with the surface layer of the upper layer.   The insole of shoes in any one of Claim 1 thru | or 10 which gave non-slip shape to the lower surface of this lower layer.   A shoe comprising the insole as claimed in any one of claims 1 to 11.   The shoe according to claim 12, wherein the lower layer is formed integrally with a sole portion of the shoe.

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