Insole and method for manufacturing insole

Abstract

An insole for improving the comfort of a shoe. The insole is provided with a main body part, a covering part and an inner arch part. The main body part is configured to be opposite to the heel, the inner side longitudinal arch part and the outer side longitudinal arch part of the sole. The covering part is formed in a region facing the inner longitudinal arch part in the plantar-side surface of the main body part. The inner bow is configured to cover the covered portion. The inner arch portion has a surface on the sole side as an upper surface and a surface on the opposite side from the upper surface as a lower surface. And the lower surface of the inner bow part has a shape matched with that of the covered part. The main body part and the inner bow part are made of materials with different hardness.

Description

[0001] Cross - reference to related applications

[0002] This international application claims the priority of Japanese Patent Application No. 2022 - 185631, filed with the Japan Patent Office on November 21, 2022, the entire content of which is incorporated herein by reference. Technical field

[0003] The present disclosure relates to an insole and a method for manufacturing the insole. Background art

[0004] As described in Patent Document 1, there is known a technique in which materials having different hardnesses are disposed at a portion that supports the ball of the big toe and a portion that supports the ball of the little toe in an in - shoe lining (in other words, an insole), thereby smoothly moving the center of gravity of a user wearing shoes.

[0005] Prior art documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent No. 3662014 Gazette Summary of the invention

[0008] Problems to be Solved by the Invention

[0009] However, the in - shoe lining of Patent Document 1 does not have a structure that takes into account the fitting feeling of the user's sole and the dispersion of the pressure applied to the sole, and thus there is a possibility that sufficient comfort cannot be obtained.

[0010] In one aspect of the present disclosure, it is desired to improve the comfort of shoes.

[0011] Solutions to the Problems

[0012] One embodiment of the present disclosure is an insole, which includes a main body portion, a covering portion, and an inner arch portion. The main body portion is a flat portion with cushioning properties and is configured to face the heel, the medial longitudinal arch portion, and the lateral longitudinal arch portion of the sole of the foot. The covering portion is formed in a region of the sole-side surface of the main body portion that faces the medial longitudinal arch portion. The inner arch portion is a portion with cushioning properties and is configured to cover the covering portion. In the inner arch portion, the sole-side surface is regarded as the upper surface, and the surface located on the opposite side of the upper surface is regarded as the lower surface. The lower surface of the inner arch portion has a shape adapted to the covering portion. The main body portion and the inner arch portion are made of materials with different hardnesses. The covering portion is formed as a recessed region in the sole-side surface of the main body portion, and the outer edge of the inner arch portion overlaps with the outer edge of the covering portion. At least a part of the outer edge of the inner arch portion is formed by a linear portion, and the linear portion forms the outer edges of the upper surface and the lower surface. The hardness of the material constituting the main body portion and the hardness of the material constituting the inner arch portion are 10 Shore hardness or more and 50 Shore hardness or less. The absolute value obtained by subtracting the hardness of the material constituting the main body portion from the hardness of the material constituting the inner arch portion is 10 Shore hardness or more and 40 Shore hardness or less. The insole further includes an inner arch portion and a surface layer material. The inner arch portion is disposed in the covering portion. The surface layer material is a sheet-like member that covers the upper surface, which is the plane on the sole side of the main body portion. The surface layer material is joined to the upper surface of the inner arch portion and the upper surface of the main body portion by hot melt adhesive.

[0013] According to the above configuration, the inner arch portion is configured as a component different from the main body portion, and in addition, the hardness of the material constituting the inner arch portion is different from the hardness of the material constituting the main body portion. Therefore, by selecting the shape, thickness, and hardness of the inner arch portion, it is possible to adjust the shape, height, and hardness distribution of the portion of the insole that abuts against the medial longitudinal arch portion. As a result, the fitting feeling of the insole to the sole of the foot can be improved, and the pressure applied to the sole of the foot by the insole can be promoted to be dispersed. Therefore, the comfort of the shoe can be improved.

[0014] In addition, it is easy to dispose the inner arch portion in the covering portion.

[0015] In addition, it is possible to suppress a situation where the thickness of the inner arch portion changes sharply near the outer edge of the inner arch portion. Therefore, it is possible to promote a smooth change in the hardness distribution of the region of the inner arch portion near the outer edge, thereby suppressing discomfort to the user.

[0016] In addition, it is possible to appropriately integrate the inner arch portion and the main body portion through the surface layer material. Therefore, it is possible to suppress damage to the fitting feeling of the insole and the dispersibility of the pressure applied to the sole of the foot by the insole.

[0017] In one embodiment of the present disclosure, the surface layer material may further cover the lower surface of the main body portion that is located on the opposite side of the upper surface. The surface layer material and the lower surface of the main body portion may be joined by hot melt adhesive.

[0018] According to the above configuration, the inner arch part and the main body part can be appropriately strengthened by the surface layer material, so that the deformation of the insole caused by the load from the sole can be suppressed. Therefore, the damage to the fitting feeling of the insole and the dispersion of the pressure applied to the sole by the insole can be suppressed.

[0019] In one aspect of the present disclosure, the insole may further include ears provided along the outer edge of the main body part. The surface layer material may include an upper surface layer material and a lower surface layer material. The upper surface layer material covers the upper surface of the inner arch part and the upper surface of the main body part. The lower surface layer material covers the lower surface of the main body part. The ears may include an upper edge part including the outer edge of the upper surface layer material and a lower edge part including the outer edge of the lower surface layer material. The upper edge part and the lower edge part may be arranged to overlap each other and may be joined by hot melt adhesive.

[0020] According to the above configuration, the upper surface layer material and the lower surface layer material can be well joined at the ears. In addition, the deformation of the insole can be suppressed by the ears, and the strength of the insole can be improved.

[0021] One aspect of the present disclosure is a method for manufacturing an insole that uses a first mold and a second mold to manufacture the insole. The insole includes a main body portion, a covering portion, and an inner arch portion. The main body portion is a flat portion with cushioning and is configured to face the heel, the medial longitudinal arch portion, and the lateral longitudinal arch portion of the sole of the foot. The covering portion is formed in a region of the surface on the sole side of the main body portion that faces the medial longitudinal arch portion. The inner arch portion is a portion with cushioning and is configured to cover the covering portion. The surface on the opposite side of the surface on the sole side of the inner arch portion is taken as the lower surface. The lower surface of the inner arch portion has a shape adapted to the covering portion. The main body portion and the inner arch portion are made of materials with different hardnesses. The insole further includes an upper surface layer material, which is a sheet-like component that covers the following upper surfaces, where the upper surfaces are the surfaces on the sole side of the inner arch portion and the main body portion of the covering portion. The first mold has a first portion and a first peripheral portion. The first portion has a shape corresponding to the insole, and the first peripheral portion surrounds the first portion. The second mold has a second portion and a second peripheral portion. The second portion is a concave portion and is configured such that when the second portion faces the first portion, a receiving space is formed between the first portion and the second portion. The second portion has a shape corresponding to the insole, and the second peripheral portion surrounds the second portion. The following object is taken as the heating object. In the heating object, a hot melt adhesive is disposed between the upper surfaces of the inner arch portion and the main body portion disposed in the covering portion and the upper surface layer material that covers the upper surfaces, and an upper side edge portion is formed on the upper surface layer material so as to surround the upper surfaces. The method for manufacturing the insole includes: causing the upper surface layer material, the upper surface of the inner arch portion, and the upper surface of the main body portion to face the first portion of the first mold, causing the lower surface of the main body portion to face the second portion of the second mold, and bringing the first peripheral portion and the second peripheral portion closer to each other such that the upper side edge portion is located between the first peripheral portion and the second peripheral portion, thereby disposing the heating object in the receiving space formed between the first portion and the second portion; and heating the heating object disposed in the receiving space by the first mold and the second mold, thereby joining the upper surface of the inner arch portion and the upper surface of the main body portion to the upper surface layer material.

[0022] According to the above configuration, an insole can be manufactured well that can improve the fitting feeling of the insole to the sole of the foot and can promote the dispersion of the pressure applied to the sole of the foot by the insole. Therefore, the comfort of the shoe can be improved. In addition, the inner arch portion and the main body portion can be joined to the upper surface layer material well.

[0023] In one embodiment of the present disclosure, the insole may further include a lower surface layer material, which is a sheet-like component and covers the lower surface of the main body portion on the side opposite to the upper surface. In the heating object, a hot melt adhesive may be disposed between the lower surface of the main body portion and the lower surface layer material covering the lower surface. The manufacturing method of the insole may include: disposing the heating object in the accommodation space such that the upper surface layer material, the upper surface of the inner arch portion, and the upper surface of the main body portion face the first part of the first mold, and the lower surface of the lower surface layer material and the lower surface of the main body portion face the second part of the second mold; and heating the heating object by the first mold and the second mold, thereby bonding the upper surface of the inner arch portion and the upper surface of the main body portion to the upper surface layer material, and bonding the lower surface of the main body portion to the lower surface layer material.

[0024] According to the above configuration, the inner arch portion and the main body portion can be well bonded to the upper surface layer material and the lower surface layer material.

[0025] In one embodiment of the present disclosure, the insole may further include an ear portion provided along the outer edge of the main body portion. The ear portion may have an upper edge portion including the outer edge of the upper surface layer material and a lower edge portion including the outer edge of the lower surface layer material. In the manufacturing method of the insole, when the heating object is disposed in the accommodation space, the upper edge portion and the lower edge portion may be in a state of overlapping between the first peripheral portion and the second peripheral portion, and a hot melt adhesive may be disposed between the upper edge portion and the lower edge portion. The heating object can be heated by the first mold and the second mold, thereby also bonding the upper edge portion and the lower edge portion to form the ear portion.

[0026] According to the above configuration, the ear portion can be properly formed.

[0027] In one embodiment of the present disclosure, a cutting portion may be provided in the heating object, the cutting portion is provided along the outer edge of the upper surface of the main body portion, and the main body portion and the cutting portion may be formed as an integrated component. In the heating object, the upper surface layer material may cover the upper surface of the inner arch portion and the upper surface of the main body portion, and the upper edge portion of the upper surface layer material may cover the cutting portion, and a hot melt adhesive may be disposed between the upper surface layer material and the inner arch portion, the main body portion, and the cutting portion. In the manufacturing method of the insole, in the heating object disposed in the accommodation space, the upper edge portion and the cutting portion are sandwiched between the first peripheral portion and the second peripheral portion, and the heating object can be heated by the first mold and the second mold, thereby bonding the inner arch portion, the main body portion, and the cutting portion to the upper surface layer material. The manufacturing method of the insole may further include: after bonding the inner arch portion, the main body portion, and the cutting portion to the upper surface layer material, cutting and separating the cutting portion from the portion of the upper surface layer material covering the cutting portion.

[0028] According to the above configuration, the inner arch portion and the main body portion can be well bonded to the upper surface layer material. Description of the Drawings

[0029] Figure 1 is a top view of the insole (for right foot) of the first embodiment.

[0030] Figure 2 is a top view of the cushioning material (for right foot) of the first embodiment.

[0031] Figure 3 is a front view of the cushioning material (for right foot) of the first embodiment.

[0032] Figure 4 is a bottom view of the cushioning material (for right foot) of the first embodiment.

[0033] Figure 5 is a rear view of the cushioning material (for right foot) of the first embodiment.

[0034] Figure 6 is a left side view of the cushioning material (for right foot) of the first embodiment as observed from the left side (in other words, the medial longitudinal arch side of the right foot).

[0035] Figure 7 is a right side view of the cushioning material (for right foot) of the first embodiment as observed from the right side (in other words, the lateral longitudinal arch side of the right foot).

[0036] Figure 8 is Figure 2 the VIII-VIII cross-sectional view of

[0037] Figure 9 is Figure 2 the IX-IX cross-sectional view of

[0038] Figure 10 is Figure 2 the X-X cross-sectional view of

[0039] Figure 11 is Figure 2 the XI-XI cross-sectional view of

[0040] Figure 12 is a cross-sectional view that transversely cuts across the main body portion and the inner arch portion of the insole of the first embodiment in the left-right direction.

[0041] Figure 13 is a top view of the insole (for right foot) of the second embodiment.

[0042] Figure 14 is a top view of the cushioning material (for right foot) of the second embodiment.

[0043] Figure 15 is a front view of the cushioning material (for right foot) of the second embodiment.

[0044] Figure 16 It is a bottom view of the cushioning material (for right foot) of the second embodiment.

[0045] Figure 17 It is a rear view of the cushioning material (for right foot) of the second embodiment.

[0046] Figure 18 It is a left side view of the cushioning material (for right foot) of the second embodiment.

[0047] Figure 19 It is a right side view of the cushioning material (for right foot) of the second embodiment.

[0048] Figure 20 It is Figure 14 a cross-sectional view taken along XX-XX of

[0049] Figure 21 It is Figure 14 a cross-sectional view taken along XXI-XXI of

[0050] Figure 22 It is Figure 14 a cross-sectional view taken along XXII-XXII of

[0051] Figure 23 It is Figure 14 a cross-sectional view taken along XXIII-XXIII of

[0052] Figure 24 It is Figure 14 a cross-sectional view taken along XXIV-XXIV of

[0053] Figure 25 It is a cross-sectional view that horizontally traverses the main body part, inner arch part, and front part of the insole of the second embodiment in the left-right direction.

[0054] Figure 26 It is an explanatory diagram of the manufacturing method of the insole of the third embodiment.

[0055] Figure 27 It is an explanatory diagram of the manufacturing method of the insole of the third embodiment.

[0056] Figure 28 It is an explanatory diagram of the manufacturing method of the insole of the fourth embodiment.

[0057] Figure 29 It is an explanatory diagram of the manufacturing method of the insole of the fourth embodiment.

[0058] Explanation of Reference Numerals

[0059] 1... Insole; 10... Cushioning material; 11... Hot melt adhesive; 2A... Main body part;

[0060] 20…Upper surface; 21…Lower surface; 22…Coated portion; 23…Outer edge; 2B…Inner arch portion;

[0061] 24…Upper surface; 25…Lower surface; 26…Outer edge; 3…Surface material; 30…Upper side surface material;

[0062] 31…Upper side edge portion; 32…Lower side surface material; 33…Lower side edge portion; 34…Ear portion;

[0063] 4…Insole; 40…Cushioning material; 41…Hot melt adhesive; 5A…Main body portion; 50…Upper surface;

[0064] 51…Lower surface; 52…Coated portion; 53…Front side sub-coated portion; 54…Rear side sub-coated portion;

[0065] 5B…Inner arch portion; 55…Upper surface; 56…Lower surface; 57…Outer edge; 58…Cutting portion;

[0066] 58A…Upper surface; 58B…Lower surface; 6A…Front side portion; 60…Upper surface; 61…Lower surface;

[0067] 62…Outer edge; 6B…Rear side portion; 63…Upper surface; 64…Lower surface; 65…Outer edge;

[0068] 7…Surface material; 80…First mold; 81…First abutting surface; 82…First part;

[0069] 83…First peripheral portion; 84…Second mold; 85…Second abutting surface; 86…Second part;

[0070] 87…Second peripheral portion; 88…Accommodating space. Detailed implementation manners

[0071] The following describes the implementation manners of the present disclosure with reference to the accompanying drawings. In addition, the implementation manners of the present disclosure are not limited to the following implementation manners, and various implementation manners can be adopted within the technical scope to which the present disclosure pertains. In addition, Figure 2 、 3 The patterns in 5, 7 - 12, 14, 15, 18 - 29 are marked for convenience of distinguishing components. Here, it is supplemented and explained that the components disclosed in the following implementation manners are not marked with the above patterns.

[0072] [1. First implementation manner]

[0073] [(1) Summary]

[0074] The insole 1 of the first implementation manner can be used for various shoes (refer to Figure 1)。Specifically, the insole 1 can be used for various types of footwear / shoes such as business shoes, casual shoes, high heels, sports shoes, sandals, boots, etc. The insole 1 has cushioning properties and is formed on the upper surface of the sole. That is, the insole 1 abuts against the user's sole, and the midsole and outsole of the shoe are located on the lower side of the insole 1. The insole 1 can be circulated as part of the shoe using the insole 1, or can be circulated in the form of the insole 1 alone.

[0075] Hereinafter, the left side in the right shoe and the right side in the left shoe will be regarded as the inner side, and the opposite side will be regarded as the outer side. In addition, the toe side will be regarded as the front side, and the heel side will be regarded as the rear side.

[0076] The insole 1 includes a cushioning main body portion 2A and an inner arch portion 2B (hereinafter referred to as the cushioning material 10), and a surface layer material 3 (refer to Figure 1 ). Each part included in the insole 1 will be described hereinafter.

[0077] [(2) Main body portion]

[0078] The main body portion 2A is a flat portion and is a portion configured to oppose at least the heel, the medial longitudinal arch portion, and the lateral longitudinal arch portion of the sole (refer to Figures 2 to 12 ).

[0079] Here, the surface of the main body portion 2A that faces the sole is defined as the upper surface 20, and the surface opposite to the upper surface 20 is defined as the lower surface 21. In the first embodiment, as an example, the portion of the outer surface of the main body portion 2A other than the upper surface 20 is defined as the lower surface 21.

[0080] A covering portion 22 is formed in the region of the upper surface 20 of the main body portion 2A that opposes the medial longitudinal arch portion. The covering portion 22 is a recessed portion on the upper surface 20 of the main body portion 2A and has an elongated shape extending in the front-rear direction when viewed from above. In addition, a part of the covering portion 22 near the outer edge 23 is formed to gradually become shallower as it approaches the outer edge 23.

[0081] In addition, in the first embodiment, as an example, at least one hole portion 21A is formed at a position on the lower surface 21 of the main body portion 2A that opposes the lateral longitudinal arch portion. More specifically, in the first embodiment, four cylindrical hole portions 21A arranged in a row along the front-rear direction are provided on the lower surface 21.

[0082] [(3) Inner arch portion]

[0083] The inner arch portion 2B is configured to cover the covering portion 22 (refer to Figure 2 , Figure 3 , Figure 5 , Figures 7 to 12)。As an example, the inner arch part 2B has a flat shape, and has an upper surface 24 on the plantar side and a lower surface 25 on the opposite side of the upper surface 24. Of course, the inner arch part 2B is not limited to a flat shape and can have various shapes.

[0084] The lower surface 25 of the inner arch part 2B has a shape adapted to the covering part 22. When the inner arch part 2B is arranged on the covering part 22, the lower surface 25 of the inner arch part 2B abuts (as an example, closely adheres) on the covering part 22.

[0085] In addition, the lower surface 25 of the inner arch part 2B is joined to the covering part 22. Here, for example, it is assumed that the inner arch part 2B and the main body part 2A are made of a material that is difficult to join, such as CRYSTAL GEL (registered trademark, crystal gel) described later. In this case, the above-mentioned parts can be joined by performing high-adhesion processing on the lower surface 25 of the inner arch part 2B and the covering part 22.

[0086] In addition, when the inner arch part 2B is arranged on the covering part 22, the outer edge 26 of the inner arch part 2B can overlap with the outer edge 23 of the covering part 22, or there can be a certain deviation between the above-mentioned outer edges 23 and 26. In addition, when the inner arch part 2B is arranged on the covering part 22, the inner arch part 2B is formed in such a way as to suppress the height difference between the upper surface 24 of the inner arch part 2B and the upper surface 20 of the main body part 2A.

[0087] In addition, the outer edge 26 of the inner arch part 2B is formed by a linear part that forms the outer edge of the upper surface 24 and the outer edge of the lower surface 25 of the inner arch part 2B over the entire circumference (refer to Figures 8 to 12 ). That is to say, the outer edge 26 of the inner arch part 2B is formed by the front end of a part with an angular or sharp shape where the upper surface 24 and the lower surface 25 intersect. Therefore, around the outer edge 26 of the inner arch part 2B, the thickness of the inner arch part 2B can be formed to gradually become thinner as it approaches the outer edge 26.

[0088] In addition, a part of the outer edge 26 of the inner arch part 2B can also be formed as the above-mentioned linear part. Moreover, other parts of the outer edge 26 can be in a shape with roundness or can extend in a planar shape. In addition, the outer edge 26 of the inner arch part 2B can be in a shape with roundness over the entire circumference or can extend in a planar shape over the entire circumference.

[0089] [(4) Regarding materials]

[0090] The main body part 2A and the inner arch part 2B are made of materials with different hardnesses. As an example, the hardness of the above materials is 10 Shore Durometer or more and 50 Shore Durometer or less. In addition, in this specification, the hardness is measured by the method according to JIS K6253 (JIS-E type). In addition, the hardness of the above materials is not limited to this, and can be appropriately specified.

[0091] In addition, as an example, the hardness of the material forming the inner arch part 2B is greater than the hardness of the material forming the main body part 2A, and the difference in the above hardness is 10 Shore Durometer or more and 40 Shore Durometer or less. In addition to this, for example, the hardness of the material forming the main body part 2A can be greater than the hardness of the material forming the inner arch part 2B, and the difference in the above hardness can be 10 Shore Durometer or more and 40 Shore Durometer or less. Of course, the difference in the above hardness is not limited to this and can be appropriately specified.

[0092] In addition, as an example, the main body part 2A and the inner arch part 2B are made of a gel material. Specifically, for example, the main body part 2A and the inner arch part 2B can be made of a styrene-based gel material, and more specifically, can be made of the above-mentioned CRYSTALGEL. Of course, it is not limited to this, and the main body part 2A and / or the inner arch part 2B can also be made of a cushioning material other than the gel material, such as a porous material (as an example, a sponge material such as EVA), etc.

[0093] [(5) Surface material]

[0094] The surface material 3 is a sheet-like member, and the outer surface of the cushioning material 10 formed by the main body part 2A and the inner arch part 2B disposed on the covering part 22 of the main body part 2A is entirely covered (refer to Figure 1 , Figure 12 ). When the insole 1 is disposed in the sole, the cushioning material 10 faces the heel, the medial longitudinal arch part, and the lateral longitudinal arch part in the sole, and the surface material 3 covers substantially the entire area of the sole.

[0095] Specifically, the surface material 3 includes an upper surface material 30 and a lower surface material 32. The upper surface material 30 covers the upper surface 20 of the main body part 2A and the upper surface 24 of the inner arch part 2B. In addition, the lower surface material 32 covers the lower surface 21 of the main body part 2A. In addition, the upper surface material 30 and the lower surface material 32 are joined to the upper surface 24 of the inner arch part 2B, the upper surface 20 of the main body part 2A, and the lower surface 21 of the main body part 2A respectively by a hot melt adhesive 11.

[0096] The surface layer material 3 has ear portions 34 provided along the outer edge of the main body portion 2A (in other words, the cushioning material 10). As an example, the ear portions 34 are provided so as to surround the cushioning material 10 and project forward from the front end portion of the cushioning material 10 located on the front side. That is, the ear portions 34 cover the portion of the sole that is more forward than the cushioning material 10. Of course, it is not limited to this, and the ear portions 34 may also be provided along a part of the outer edge of the main body portion 2A.

[0097] Here, the portion of the upper surface layer material 30 that includes the outer edge is defined as the upper edge portion 31. The upper edge portion 31 is the portion of the upper surface layer material 30 that does not cover the cushioning material 10 and is provided so as to surround the outer edge of the upper surface 20 of the main body portion 2A. In other words, the upper edge portion 31 corresponds to the outer edge of the upper surface layer material 30 and the portion adjacent to the outer edge.

[0098] Similarly, the portion of the lower surface layer material 32 that includes the outer edge is defined as the lower edge portion 33. The lower edge portion 33 is the portion of the lower surface layer material 32 that does not cover the cushioning material 10 and is provided so as to surround the outer edge of the lower surface 21 of the main body portion 2A. In other words, the lower edge portion 33 corresponds to the outer edge of the lower surface layer material 32 and the portion adjacent to the outer edge.

[0099] The ear portions 34 are formed by joining the overlapping upper edge portion 31 and the lower edge portion 33 using a hot melt adhesive 11.

[0100] In the first embodiment, as an example, the ear portions 34 are provided along the outer edge of the upper surface 20 of the main body portion 2A. That is, the ear portions 34 are provided so as to extend outward from the outer edge of the upper surface 20 of the main body portion 2A along the upper surface 20. Of course, it is not limited to this, and the ear portions 34 may also be provided at a position below the upper surface 20 in the main body portion 2A, in other words, at the position on the lower surface 21 of the main body portion 2A that forms the side portion of the main body portion 2A.

[0101] In addition, the surface layer material 3 of the first embodiment may also be configured without the ear portions 34. In addition, for example, the surface layer material 3 of the first embodiment may be the same as that of the second embodiment, having a structure of an upper surface layer material that covers the upper surface, which is the plantar side surface of the cushioning material 10, and not having the structure of the ear portions 34 or the lower surface layer material 32.

[0102] [(6) Overall shape of the insole]

[0103] The shape and / or thickness of the main body portion 2A and the inner arch portion 2B of the insole 1 are adjusted to be a three-dimensional shape adapted to the shape of the sole (refer to Figures 2 to 12 ).

[0104] Specifically, the shape and thickness of the inner arch portion 2B, and the shape and thickness of the covering portion 22 and its peripheral portions in the main body portion 2A are adjusted in such a manner as to increase the thickness of the portion in the insole 1 that faces the medial longitudinal arch portion. Thereby, the insole 1 is urged into contact with the medial longitudinal arch portion. In addition, the shape and / or thickness of the main body portion 2A is adjusted in such a manner that the inner, outer, and rear edge portions of the insole 1 protrude upward.

[0105] [2. Second Embodiment]

[0106] [(1) Outline]

[0107] The insole 4 of the second embodiment has the same configuration as the insole 1 of the first embodiment, however, the shape of the main body portion 5A and the configuration of the surface material 7 are different from those of the first embodiment (see Figures 13 to 25 ). Hereinafter, the insole 4 of the second embodiment will be described centering on the differences from the first embodiment.

[0108] The insole 4 includes a main body portion 5A, an inner arch portion 5B, a front portion 6A, and a rear portion 6B, and all of these portions have cushioning properties. In addition, a cushioning material 40 is formed by these portions. Hereinafter, each portion included in the insole 4 will be described.

[0109] [(2) Main Body Portion]

[0110] The main body portion 5A is a flat portion and is arranged to face substantially the entire area of the sole (see Figures 14 to 25 ). More specifically, as an example, the main body portion 5A extends over substantially the entire area of the sole and supports substantially the entire area of the sole.

[0111] Similar to the first embodiment, the main body portion 5A has an upper surface 50 and a lower surface 51, and a covering portion 52 is formed in the region facing the medial longitudinal arch portion of the upper surface 50, and the structure of the covering portion 52 is the same as that of the first embodiment. In addition, the main body portion 5A also has a front side sub-covering portion 53 and a rear side sub-covering portion 54.

[0112] The front side sub-covering portion 53 is formed at a position on the upper surface 50 of the main body portion 5A that faces the transverse arch portion of the sole. In addition, the rear side sub-covering portion 54 is formed at a position on the upper surface 50 that faces the lateral longitudinal arch portion of the sole. The front side sub-covering portion 53 and the rear side sub-covering portion 54 are formed as depressions in the upper surface 50.

[0113] [(3) Inner Arch Portion]

[0114] The inner arch portion 5B has the same structure as that of the first embodiment, and has an upper surface 55 and a lower surface 56 (see Figure 14 , Figure 15 , Figures 20 to 25)。In addition, the inner arch part 5B is arranged in the covering part 52 in the same manner as in the first embodiment, and the lower surface 56 of the inner arch part 5B is joined to the covering part 52.

[0115] In addition, for example, assume a case where the inner arch part 5B is made of a gel material (e.g., CRYSTAL GEL) and the main body part 5A is made of a porous material (e.g., sponge material such as EVA). In this case, the inner arch part 5B can be joined to the covering part 52 using hot melt adhesive.

[0116] In addition, similar to the first embodiment, the outer edge 57 of the inner arch part 5B is formed as a linear part for the entire circumference or a part thereof (refer to Figures 22 to 25 ). In addition, the part of the outer edge 57 that is not formed as a linear part can have a rounded shape or can extend in a planar shape.

[0117] [(4) Front side part and rear side part]

[0118] The front side part 6A and the rear side part 6B are respectively provided corresponding to the front side sub-covering part 53 and the rear side sub-covering part 54, and are arranged in the corresponding sub-covering parts in the same manner as the inner arch part 5B is arranged in the covering part 52 (refer to Figure 14 , Figure 15 , Figures 19 to 23 , Figure 25 ).

[0119] That is to say, the front side part 6A and the rear side part 6B are arranged to respectively cover the front side sub-covering part 53 and the rear side sub-covering part 54. As an example, the front side part 6A and the rear side part 6B have a flat shape, and respectively have an upper surface 60, 63 on the plantar side and a lower surface 61, 64 on the opposite side of the upper surfaces 60, 63. Of course, the front side part 6A and the rear side part 6B are not limited to a flat shape and can have various shapes.

[0120] In addition, the lower surface 61 of the front side part 6A and the lower surface 64 of the rear side part 6B respectively have a shape adapted to the front side sub-covering part 53 and the rear side sub-covering part 54, and are configured to respectively abut (as an example, closely fit) against the front side sub-covering part 53 and the rear side sub-covering part 54. In addition, similar to the joining of the inner arch part 5B and the covering part 52, the lower surface 61 of the front side part 6A and the lower surface 64 of the rear side part 6B are respectively joined to the front side sub-covering part 53 and the rear side sub-covering part 54.

[0121] In addition, similar to the outer edge 57 of the inner arch part 5B, the outer edge 62 of the front side part 6A and the outer edge 65 of the rear side part 6B are formed as a linear part for the entire circumference or a part thereof (refer to Figures 21 to 23 , Figure 25)。In addition, portions of the outer edges 62 and 65 that are not formed as linear portions may have a rounded shape or may extend in a planar shape.

[0122] [(5) Surface material]

[0123] Similar to the first embodiment, the surface material 7 is a sheet-like component. The surface material 7 covers the entire upper surface of the cushioning material 40 on the plantar side, where the cushioning material 40 is formed by the main body portion 5A and the inner arch portion 5B, the front side portion 6A, and the rear side portion 6B disposed in the covering portion 52, the front side sub-covering portion 53, and the rear side sub-covering portion 54, respectively (see Figure 13 , Figure 25 ).

[0124] Different from the first embodiment, the surface material 7 has a structure as an upper surface material and does not have a lower surface material. That is, the surface material 7 covers the upper surface 50 of the main body portion 5A, the upper surface 55 of the inner arch portion 5B, the upper surface 60 of the front side portion 6A, and the upper surface 63 of the rear side portion 6B. On the other hand, the lower surface 51 of the main body portion 5A is not covered by the surface material 7. In addition, similar to the first embodiment, the surface material 7 is joined to the upper surfaces 50, 55, 60, and 63 of the main body portion 5A, the inner arch portion 5B, the front side portion 6A, and the rear side portion 6B, respectively, by the hot melt adhesive 41.

[0125] In addition, the surface material 7 of the second embodiment does not have ears. Therefore, the outer edge of the surface material 7 is disposed along the outer edge of the cushioning material 40.

[0126] Of course, not limited thereto, the surface material 7 of the second embodiment may also be configured in the same manner as the surface material of the first embodiment. That is, the surface material 7 may include an upper surface material and a lower surface material and may have the same ears as the first embodiment.

[0127] [(6) Overall shape and material of the insole]

[0128] Similar to the first embodiment, the shapes and / or thicknesses of the main body portion 5A, the inner arch portion 5B, the front side portion 6A, and the rear side portion 6B of the insole 4 are adjusted to form a three-dimensional shape adapted to the shape of the sole (see Figures 14 to 25 ).

[0129] In addition, the hardness of the material constituting the main body portion 5A, the numerical range of the hardness of the material constituting the inner arch portion 5B, and the magnitude relationship and the numerical range of the difference of the above hardness are defined in the same manner as in the first embodiment.

[0130] In addition, the hardness of the material constituting the front side portion 6A and the rear side portion 6B may be the same as the hardness of the material constituting the inner arch portion 5B.

[0131] In addition, as an example, the inner arch portion 5B, the front side portion 6A, and the rear side portion 6B are made of a gel material. Specifically, for example, the inner arch portion 5B, the front side portion 6A, and the rear side portion 6B may be made of a styrene-based gel material, and more specifically, may be made of the above-mentioned CRYSTAL GEL. On the other hand, the main body portion 5A may be made of, for example, a porous and cushioning material (as an example, a sponge material such as EVA).

[0132] Of course, it is not limited to this, and all or part of the inner arch portion 5B, the front side portion 6A, and the rear side portion 6B may also be made of materials other than the gel material, such as a porous material. In addition, the main body portion 5A may also be made of a gel material (as an example, CRYSTAL GEL).

[0133] [3. Third Embodiment]

[0134] In the third embodiment, an example of the manufacturing method of the insole 1 of the first embodiment will be described. The manufacturing process of the insole 1 includes a placement process and a bonding process (refer to Figure 26 , Figure 27 ). The placement process refers to the process of placing the main body portion 2A (in other words, the cushioning material 10) in a state where the inner arch portion 2B is already placed on the covering portion 22, the upper surface layer material 30, the lower surface layer material 32, and the hot melt adhesive 11. The bonding process refers to the process of bonding the main body portion 2A and the inner arch portion 2B to the surface layer material 3 through the hot melt adhesive 11.

[0135] In addition, in the bonding process, the first mold 80 and the second mold 84 are used and bonded through the hot melt adhesive 11.

[0136] The first mold 80 has a first abutting surface 81, and a first portion 82 and a first peripheral portion 83 are provided on the first abutting surface 81. The first portion 82 is formed as a protruding portion on the first abutting surface 81 and is provided away from the outer edge of the first abutting surface 81. The first peripheral portion 83 is adjacent to the outer edge of the first abutting surface 81 and surrounds the first portion 82.

[0137] The second mold 84 has a second abutting surface 85, and a second portion 86 and a second peripheral portion 87 are provided on the second abutting surface 85. The second portion 86 is formed as a concave portion on the second abutting surface 85 and is provided away from the outer edge of the second abutting surface 85. The second peripheral portion 87 is adjacent to the outer edge of the second abutting surface 85 and surrounds the second portion 86.

[0138] Moreover, if the first mold 80 and the second mold 84 are arranged such that the first portion 82 and the second portion 86 face each other and the first peripheral portion 83 and the second peripheral portion 87 face each other, a receiving space 88 is formed between the first portion 82 and the second portion 86.

[0139] In the configuration process, the first mold 80 and the second mold 84 are arranged such that the first abutting surface 81 faces the second abutting surface 85 (see Figure 26 ). At this time, a buffer material 10 is arranged between the first abutting surface 81 and the second abutting surface 85. In addition, an upper surface layer material 30 is arranged between the first abutting surface 81 and the buffer material 10, and a hot melt adhesive 11 is arranged between the upper surface layer material 30 and the buffer material 10. In addition, a lower surface layer material 32 is arranged between the second abutting surface 85 and the buffer material 10, and a hot melt adhesive 11 is arranged between the lower surface layer material 32 and the buffer material 10.

[0140] Next, in the configuration process, the first mold 80 and the second mold 84 are brought closer to each other, thereby forming an accommodation space 88 (see Figure 27 ). At this time, in the accommodation space 88, the surface layer material 3, the buffer material 10, and the hot melt adhesive 11 are arranged in a state of forming an object to be heated.

[0141] That is to say, in the object to be heated, the upper surface layer material 30 is arranged so as to cover the upper surface 20 of the main body portion 2A and the upper surface 24 of the inner bow portion 2B, and a hot melt adhesive 11 is arranged between the upper surfaces 20, 24 and the upper surface layer material 30. In addition, the upper surface layer material 30 abuts (in other words, faces) the first portion 82 of the first mold 80. In addition, the upper surface 20 of the main body portion 2A and the upper surface 24 of the inner bow portion 2B face the first portion 82.

[0142] In addition, in the object to be heated, the lower surface layer material 32 is arranged so as to cover the lower surface 21 of the main body portion 2A, and a hot melt adhesive 11 is arranged between the lower surface 21 and the lower surface layer material 32. In addition, the lower surface layer material 32 abuts (in other words, faces) the second portion 86 of the second mold 84. In addition, the lower surface 21 of the main body portion 2A faces the second portion 86.

[0143] In addition, the upper edge portion 31 of the upper surface layer material 30 and the lower edge portion 33 of the lower surface layer material 32 are in an overlapping state, and a hot melt adhesive 11 is also arranged between these portions. The upper edge portion 31 abuts the first peripheral portion 83 of the first mold 80, and the lower edge portion 33 abuts the second peripheral portion 87 of the second mold 84.

[0144] Moreover, in the subsequent joining process, the first mold 80 and the second mold 83 are heated, thereby heating the object to be heated, and thus melting the hot melt adhesive 11. Then, the object to be heated is cooled, thereby joining the upper surface 20 of the main body portion 2A to the upper surface 24 of the inner arch portion 2B, and the lower surface 21 of the main body portion 2A to the upper surface layer material 30 and the lower surface layer material 32, respectively. At this time, the upper edge portion 31 and the lower edge portion 33 are also joined by the hot melt adhesive 11, thereby forming the ear portion 34.

[0145] In addition, the shape of the first portion 82 of the first mold 80 and the shape of the second portion 86 of the second mold 84 are not limited to the above shapes, and can be appropriately set within the range where the accommodation space 88 can be formed between the first portion 82 and the second portion 86. Specifically, for example, the first portion 82 of the first mold 80 can be formed as a concave portion in the first contact surface 81, and the second portion 86 of the second mold 84 can be configured as a raised portion in the second contact surface 85.

[0146] [4. Fourth Embodiment]

[0147] In the fourth embodiment, an example of the manufacturing method of the insole 4 of the second embodiment will be described. In addition, when manufacturing the insole 4 by the manufacturing method of the fourth embodiment, it is preferable that the main body portion 5A is made of a sponge material such as EVA (in other words, a heat-resistant material).

[0148] The manufacturing process of the insole 4 includes, in addition to the same configuration process and joining process as in the third embodiment, a cutting process (refer to Figure 28 , Figure 29 ).

[0149] The configuration process refers to the process of arranging the buffer material 40, the surface layer material 7, and the hot melt adhesive 41. In addition, the buffer material 40 refers to the main body portion 5A in the following state, in which the inner arch portion 5B, the front side sub-covering portion 53, and the rear side sub-covering portion 54 are respectively arranged in the covering portion 52.

[0150] In addition, the joining process refers to the process of joining the buffer material 40 and the surface layer material 7 by the hot melt adhesive 41. In the joining process, the same first mold 80 and second mold 84 as in the third embodiment are used and joined by the hot melt adhesive 41.

[0151] In the configuration process, the same as in the third embodiment, the buffer material 40 forming the object to be heated is arranged between the first contact surface 81 and the second contact surface 85 (refer to Figure 28 ). At this time, the surface layer material 7 is arranged between the first contact surface 81 and the buffer material 40, and the hot melt adhesive 41 is arranged between the surface layer material 7 and the buffer material 40.

[0152] Next, in the configuration process, in the same manner as in the third embodiment, the first mold 80 and the second mold 84 are brought close to each other, thereby forming an accommodation space 88 (see Figure 29 ). At this time, the surface material 7, the cushioning material 40, and the hot melt adhesive 41 are arranged in the accommodation space 88 in a state of forming an object to be heated.

[0153] Moreover, a cutting portion 58 is provided in the cushioning material 40 of the object to be heated in the fourth embodiment. The cutting portion 58 is a portion integrated with the main body portion 5A. That is to say, the main body portion 5A and the cutting portion 58 are not formed by joining separate components, but are formed by processing a single material into a specified shape. In addition, the cutting portion 58 is provided along the upper surface 50 of the main body portion 5A and is provided so as to surround the outer edge of the upper surface 50. The cutting portion 58 is thinner than the main body portion 5A, protrudes from the side portion of the main body portion 5A, and has an upper surface 58A adjacent to the upper surface 50 of the main body portion 5A.

[0154] In the object to be heated, the surface material 7 is arranged so as to cover the upper surfaces 50, 58A, 55, 60, 63 of the main body portion 5A, the cutting portion 58, the inner bow portion 5B, the front side portion 6A, and the rear side portion 6B, and the hot melt adhesive 41 is arranged between the upper surface and the surface material 7. In addition, the surface material 7 abuts against the first portion 82 and the first peripheral portion 83 of the first mold 80. Moreover, the upper surfaces of the main body portion 5A, the inner bow portion 5B, the front side portion 6A, and the rear side portion 6B face the first portion 82. On the other hand, the upper surface 58A of the cutting portion 58 faces the first peripheral portion 83.

[0155] In addition, in the object to be heated, the lower surface 51 of the main body portion 5A abuts against the second portion 86 of the second mold 84. Moreover, the lower surface 58B of the cutting portion 58 on the opposite side of the upper surface 58A abuts against the second peripheral portion 87 of the second mold 84.

[0156] That is to say, the cutting portion 58 is clamped by the first peripheral portion 83 and the second peripheral portion 87.

[0157] In the subsequent joining process, the first mold 80 and the second mold 84 are heated, thereby heating the object to be heated, and thus melting the hot melt adhesive 41. Then, the object to be heated is cooled, thereby joining the upper surfaces 50, 58A, 55, 60, 63 of the main body portion 5A, the cutting portion 58, the inner bow portion 5B, the front side portion 6A, and the rear side portion 6B to the surface material 7 respectively.

[0158] In the subsequent cutting process, the cushioning material 40 joined with the surface material 7 is cut along the cutting surface 42 (see Figure 29)。Thus, the cutting part 58 and the part of the surface layer material 7 covering the cutting part 58 are cut and separated from the main body part 5A to form the insole 4.

[0159] [5. Effects]

[0160] (1) According to the first and second embodiments, the inner arch parts 2B, 5B are configured as other components different from the main body parts 2A, 5A. In addition, the hardness of the material constituting the inner arch parts 2B, 5B is different from the hardness of the material constituting the main body parts 2A, 5A. Therefore, by selecting the shape, thickness, and hardness of the inner arch parts 2B, 5B, it is possible to adjust the shape, height, and the distribution of the hardness of the part in the insoles 1, 4 that abuts against the medial longitudinal arch part. Thereby, the fitting feeling of the insoles 1, 4 to the sole of the foot can be improved, and thus the pressure applied to the sole of the foot by the insoles 1, 4 can be promoted to be dispersed. Therefore, the comfort of the shoes can be improved.

[0161] In addition, the inner arch parts 2B, 5B are respectively arranged on the upper surfaces 20, 50 of the main body parts 2A, 5A. Thus, compared with the case where the inner arch parts 2B, 5B are arranged on the lower surfaces 21, 51, the distribution of hardness can be formed at a position closer to the sole of the foot. Therefore, the pressure applied to the sole of the foot by the insoles 1, 4 can be promoted to be dispersed. In addition, since the main body parts 2A, 5A and the inner arch parts 2B, 5B are configured as different components, it is easy to customize the shape or hardness distribution of the sole according to the style of the shoes or the users of the shoes, etc.

[0162] (2) In addition, the covering parts 22, 52 in the main body parts 2A, 5A are formed as recessed areas on the upper surfaces 20, 50. Therefore, when the inner arch parts 2B, 5B are arranged in the covering parts 22, 52, it is easy to position the inner arch parts 2B, 5B, and thus it is easy to arrange the inner arch parts 2B, 5B.

[0163] (3) In addition, the outer edges 26, 57 of the inner arch parts 2B, 5B are formed by the linear parts forming the ends of the upper surfaces 24, 55 and the lower surfaces 25, 56. Therefore, it is possible to suppress the situation where the thickness of the inner arch parts 2B, 5B changes sharply near the outer edges 26, 57 of the inner arch parts 2B, 5B. Thereby, it is possible to promote the smooth change of the hardness distribution in the area near the outer edges 26, 57 in the inner arch parts 2B, 5B, and thus it is possible to suppress discomfort to the user.

[0164] (4) In addition, by making the hardness of the main body parts 2A and 5A lower than that of the inner arch parts 2B and 5B, the main body parts 2A and 5A are prone to sink in response to the load from the sole of the foot, so that it is easy to create a height difference between the inner arch parts 2B and 5B and the main body parts 2A and 5A. Therefore, it prompts the insoles 1 and 4 to contact the medial longitudinal arch part, thereby improving the fitting feeling and promoting the dispersion of the pressure applied to the sole of the foot by the insoles 1 and 4. In addition, the medial longitudinal arch part of the sole of the foot is a soft part, and this part can be supported by the inner arch parts 2B and 5B with relatively higher hardness, thereby being able to bring a sense of stability to the user.

[0165] (5) In addition, by making the hardness of the inner arch parts 2B and 5B lower than that of the main body parts 2A and 5A, the inner arch parts 2B and 5B are prone to sink in response to the load from the sole of the foot. Therefore, even for the sole of the foot with a relatively shallow medial longitudinal arch part, in other words, the so-called flat foot or nearly flat foot sole, it can also prompt the insoles 1 and 4 to contact the medial longitudinal arch part, thereby improving the fitting feeling and promoting the dispersion of the pressure applied to the sole of the foot by the insoles 1 and 4.

[0166] (6) In addition, the upper surface and the lower surface of the cushioning material 10 of the insole 1 of the first embodiment are respectively covered by the upper surface layer material 30 and the lower surface layer material 32. Therefore, it is possible to moderately strengthen the inner arch part 2B and the main body part 2A, thereby being able to suppress the deformation of the insole 1 caused by the load from the sole of the foot. Therefore, it is possible to suppress the damage to the fitting feeling of the insole 1 and the dispersion of the pressure applied to the sole of the foot by the insole 1.

[0167] (7) In addition, the upper surface of the cushioning material 40 of the insole 4 of the second embodiment is covered by the surface layer material 7. Therefore, it is possible to appropriately integrate the inner arch part 5B and the main body part 5A through the surface layer material 7. Therefore, it is possible to suppress the damage to the fitting feeling of the insole 4 and the dispersion of the pressure applied to the sole of the foot by the insole 4.

[0168] (8) In addition, the upper surface layer material 30 and the lower surface layer material 32 of the insole 1 of the first embodiment can be well joined at the ear part 34. In addition, it is possible to suppress the deformation of the insole 1 through the ear part 34 and improve the strength of the insole 1.

[0169] (9) In addition, according to the manufacturing method of the third embodiment, it is possible to contribute to the manufacture of an insole 1 that can improve the fitting feeling to the sole of the foot and promote the dispersion of the pressure applied to the sole of the foot. Therefore, the comfort of the shoes can be improved. In addition, it is possible to appropriately join the surface layer material 3 with the inner arch part 2B and the main body part 2A. In addition, it is possible to appropriately form the ear part 34.

[0170] (10) In addition, according to the manufacturing method of the fourth embodiment, it is possible to contribute to the manufacture of the insole 4 that can improve the fit to the sole of the foot and promote the dispersion of the pressure applied to the sole of the foot. Therefore, the comfort of the shoes can be improved. In addition, the surface material 7 can be appropriately joined to the inner arch part 5B and the main body part 5A.

[0171] [6. Other Embodiments]

[0172] (1) In the above embodiments, the covering parts 22 and 52 are respectively formed as depressions in the upper surfaces 20 and 50 of the main body parts 2A and 5A. However, it is not limited thereto, and the covering parts 22 and 52 can have various shapes.

[0173] Specifically, for example, the covering parts 22 and 52 can be respectively formed as raised parts in the upper surfaces 20 and 50, and the lower surfaces 25 and 56 of the inner arch parts 2B and 5B can be formed as concave shapes adapted to the upper surfaces. And the lower surfaces 25 and 56 of the inner arch parts 2B and 5B can respectively abut against the covering parts 22 and 52, whereby the positions of the inner arch parts 2B and 5B can be determined in such a way that the inner arch parts 2B and 5B respectively cover the covering parts 22 and 52.

[0174] In addition, for example, the covering parts 22 and 52 can have a part extending in a planar shape and at least one protrusion formed on this part, and the lower surfaces 25 and 56 of the inner arch parts 2B and 5B can also have a part extending in a planar shape and at least one hole part for the protrusion of the covering part to be inserted into. And the protrusion can be inserted into the hole part, so that the lower surfaces 25 and 56 of the inner arch parts 2B and 5B are adapted to the covering parts 22 and 52, whereby the positions of the inner arch parts 2B and 5B can be determined in such a way that the inner arch parts 2B and 5B respectively cover the covering parts 22 and 52. Of course, the protrusion can also be formed on the lower surfaces of the inner arch parts 2B and 5B, and the hole part can be formed on the covering part, so that the lower surfaces of the inner arch parts 2B and 5B are adapted to the covering part.

[0175] In the case of having the above-described configuration, it is also possible to easily determine the positions of the inner arch parts 2B and 5B when the inner arch parts 2B and 5B are respectively arranged on the covering parts 22 and 52, so that it is easy to arrange the inner arch parts 2B and 5B.

[0176] (2) The insole 4 of the second embodiment and the fourth embodiment can be structured to not have both or either one of the front side part 6A and the rear side part 6B. Of course, it is not limited thereto, and similar to the front side part 6A and the rear side part 6B, the insole 4 can also have a part covering a specified area in the main body part 5A. In addition, the insole 1 of the first embodiment and the third embodiment can also have a part covering a specified area in the main body part 2A, similar to the front side part 6A and the rear side part 6B of the second embodiment.

[0177] (3) Multiple constituent elements may achieve multiple functions of one constituent element in the above-described embodiments, or multiple constituent elements may achieve one function of one constituent element. In addition, one constituent element may achieve multiple functions of multiple constituent elements, or one constituent element may achieve one function of multiple constituent elements. In addition, a part of the configuration of the above-described embodiments may be omitted. In addition, at least a part of the configuration of the above-described embodiments may be added to the configuration of the above-described other embodiments, or at least a part of the configuration of the above-described embodiments may be replaced with the configuration of the above-described other embodiments, etc.

[0178] [The technical idea disclosed in this specification]

[0179] [The technical idea disclosed in this specification]

[0180] [Item 1]

[0181] An insole, characterized by comprising:

[0182] A main body portion, which is a flat portion with cushioning properties and is a portion configured to face the heel, the medial longitudinal arch portion, and the lateral longitudinal arch portion of the sole of the foot;

[0183] A covering portion, which is formed in a region of the surface on the sole side of the main body portion that faces the medial longitudinal arch portion; and

[0184] An inner arch portion, which is a portion with cushioning properties and is a portion configured to cover the covering portion, and

[0185] In the inner arch portion, the surface on the sole side is used as the upper surface, and the surface located on the opposite side of the upper surface is used as the lower surface,

[0186] The lower surface of the inner arch portion has a shape adapted to the covering portion,

[0187] The main body portion and the inner arch portion are made of materials with different hardnesses.

[0188] [Item 2]

[0189] The insole according to Item 1, characterized in that

[0190] The covering portion is formed as a recessed region in the surface on the sole side of the main body portion.

[0191] [Item 3]

[0192] The insole according to Item 1 or 2, characterized in that

[0193] At least a part of the outer edge of the inner arch portion is formed by a linear portion, and the linear portion forms the outer edges of the upper surface and the lower surface.

[0194] [Item 4]

[0195] The insole according to any one of Items 1 to 3, characterized in that

[0196] The hardness of the material constituting the main body portion and the hardness of the material constituting the inner arch portion are 10 Shore hardness or more and 50 Shore hardness or less,

[0197] The absolute value obtained by subtracting the hardness of the material constituting the main body portion from the hardness of the material constituting the inner arch portion is 10 Shore hardness or more and 40 Shore hardness or less.

[0198] [Item 5]

[0199] The insole according to any one of Items 1 to 3, characterized in that

[0200] The hardness of the material constituting the main body portion and the hardness of the material constituting the inner arch portion are 10 Shore hardness or more and 50 Shore hardness or less,

[0201] The absolute value obtained by subtracting the hardness of the material constituting the inner arch portion from the hardness of the material constituting the main body portion is 10 Shore hardness or more and 40 Shore hardness or less.

[0202] [Item 6]

[0203] The insole according to any one of Items 1 to 5, characterized in that

[0204] The insole further includes a surface layer material, which is a sheet-like member that covers the following upper surface, and the upper surface is the surface on the plantar side of the inner arch portion and the main body portion disposed in the covering portion,

[0205] The surface layer material is joined to the upper surface of the inner arch portion and the upper surface of the main body portion by hot melt adhesive.

[0206] [Item 7]

[0207] The insole according to Item 6, characterized in that

[0208] The surface layer material further covers the lower surface of the main body portion on the side opposite to the upper surface,

[0209] The surface layer material is joined to the lower surface of the main body portion by hot melt adhesive.

[0210] [Item 8]

[0211] The insole according to Item 7, characterized in that

[0212] the insole further includes ears provided along the outer edge of the main body portion,

[0213] the surface material includes an upper surface material covering the upper surfaces of the inner arch portion and the main body portion, and a lower surface material covering the lower surface of the main body portion,

[0214] the ears have an upper edge portion including the outer edge of the upper surface material and a lower edge portion including the outer edge of the lower surface material,

[0215] the upper edge portion and the lower edge portion are arranged to overlap each other and are joined by hot melt adhesive.

[0216] [Item 9]

[0217] A method for manufacturing an insole, which manufactures the insole using a first mold and a second mold, characterized in that the insole includes:

[0218] a main body portion, which is a flat portion with buffering properties and is arranged to face the heel, the medial longitudinal arch portion, and the lateral longitudinal arch portion of the sole;

[0219] a covering portion, which is formed in a region of the surface on the sole side of the main body portion that faces the medial longitudinal arch portion; and

[0220] an inner arch portion, which is a portion with buffering properties and is arranged to cover the covering portion, and has the surface opposite to the surface on the sole side of the inner arch portion as the lower surface,

[0221] the lower surface of the inner arch portion has a shape adapted to the covering portion,

[0222] the main body portion and the inner arch portion are made of materials with different hardnesses,

[0223] the insole further includes an upper surface material, which is a sheet-like component that covers the following upper surfaces, and the upper surfaces are the surfaces on the sole side of the inner arch portion and the main body portion arranged in the covering portion,

[0224] the first mold has a first part,

[0225] the second mold has a second part, and when the second part faces the first part, a receiving space is formed between the first part and the second part,

[0226] The following object is taken as the heating object, and in the heating object, hot melt adhesive is disposed between the upper surface of the inner arch portion disposed in the covering portion and the upper surface of the main body portion and the upper side surface layer material covering the upper surface.

[0227] The method for manufacturing the insole includes:

[0228] Making the upper side surface layer material, the upper surface of the inner arch portion, and the upper surface of the main body portion face the first part of the first mold, and making the lower surface of the main body portion face the second part of the second mold, thereby disposing the heating object in the accommodation space formed between the first part and the second part; and

[0229] Heating the heating object disposed in the accommodation space by the first mold and the second mold, thereby joining the upper surface of the inner arch portion and the upper surface of the main body portion to the upper side surface layer material.

[0230] [Item 10]

[0231] The method for manufacturing the insole according to Item 9, characterized in that

[0232] The insole further includes a lower side surface layer material, the lower side surface layer material is a sheet-like member, and is a portion covering the lower surface of the main body portion located on the opposite side of the upper surface.

[0233] In the heating object, hot melt adhesive is disposed between the lower surface of the main body portion and the lower side surface layer material covering the lower surface.

[0234] The method for manufacturing the insole includes:

[0235] Disposing the heating object in the accommodation space in such a manner that the upper side surface layer material, the upper surface of the inner arch portion, and the upper surface of the main body portion face the first part of the first mold, and the lower side surface layer material and the lower surface of the main body portion face the second part of the second mold; and

[0236] Heating the heating object by the first mold and the second mold, thereby joining the upper surface of the inner arch portion and the upper surface of the main body portion to the upper side surface layer material, and joining the lower surface of the main body portion to the lower side surface layer material.

[0237] [Item 11]

[0238] The method for manufacturing the insole according to Item 10, characterized in that

[0239] The insole further includes ears provided along the outer edge of the main body portion.

[0240] The ears have an upper edge portion including the outer edge of the upper surface layer material and a lower edge portion including the outer edge of the lower surface layer material.

[0241] In the method for manufacturing the insole,

[0242] When the object to be heated is disposed in the accommodation space, the upper edge portion and the lower edge portion are in a state of overlapping between the first peripheral portion and the second peripheral portion, and a hot melt adhesive is disposed between the upper edge portion and the lower edge portion.

[0243] The object to be heated is heated by the first mold and the second mold, thereby also joining the upper edge portion and the lower edge portion to form the ears.

[0244] [Item 12]

[0245] The method for manufacturing the insole according to Item 9, characterized in that,

[0246] A cutting portion is further provided on the object to be heated, the cutting portion is provided along the outer edge of the upper surface of the main body portion, and the main body portion and the cutting portion are formed as an integral component.

[0247] In the object to be heated, the upper surface layer material covers the upper surface of the inner arch portion, the upper surface of the main body portion, and the cutting portion, and a hot melt adhesive is disposed between the upper surface layer material and the inner arch portion, the main body portion, and the cutting portion.

[0248] The first mold further has a first peripheral portion, and the first peripheral portion is provided along the outer edge of the first part.

[0249] The second mold further has a second peripheral portion, and the second peripheral portion is provided along the outer edge of the second part.

[0250] In the method for manufacturing the insole, in the object to be heated disposed in the accommodation space, the cutting portion is clamped between the first peripheral portion and the second peripheral portion.

[0251] The object to be heated is heated by the first mold and the second mold, thereby joining the inner arch portion, the main body portion, and the cutting portion to the upper surface layer material.

[0252] The method for manufacturing the insole further includes: after joining the inner arch portion, the main body portion, and the cutting portion to the upper surface layer material, cutting and separating the cutting portion from the portion of the upper surface layer material covering the cutting portion.

Claims

1. An insole, characterized in that, Comprising: A main body portion which is a flat portion with cushioning property and is configured to face the heel, the medial longitudinal arch portion, and the lateral longitudinal arch portion of the sole; A covering portion which is formed in a region of the sole-side surface of the main body portion that faces the medial longitudinal arch portion; And An inner arch portion which is a portion with cushioning property and is configured to cover the covering portion, and In the inner arch portion, the sole-side surface is used as the upper surface, and the surface on the opposite side of the upper surface is used as the lower surface, The lower surface of the inner arch portion has a shape adapted to the covering portion, The main body portion and the inner arch portion are made of materials with different hardnesses, The covering portion forms a recessed region in the sole-side surface of the main body portion, and the outer edge of the inner arch portion overlaps with the outer edge of the covering portion, At least a part of the outer edge of the inner arch portion is formed by a linear portion which forms the outer edges of the upper surface and the lower surface, The hardness of the material constituting the main body portion and the hardness of the material constituting the inner arch portion are 10 Shore hardness or more and 50 Shore hardness or less, The absolute value obtained by subtracting the hardness of the material constituting the main body portion from the hardness of the material constituting the inner arch portion is 10 Shore hardness or more and 40 Shore hardness or less, The insole further includes a surface layer material which is a sheet-like member that covers the following upper surfaces, the upper surfaces being the sole-side surfaces of the inner arch portion and the main body portion disposed on the covering portion, The surface layer material is joined to the upper surface of the inner arch portion and the upper surface of the main body portion by hot melt adhesive.

2. The insole according to claim 1, wherein The surface layer material also covers the lower surface of the main body portion on the side opposite to the upper surface, The surface layer material is joined to the lower surface of the main body portion by hot melt adhesive.

3. The insole according to claim 2, wherein The insole further includes ears provided along the outer edge of the main body portion, The surface layer material has an upper-side surface layer material that covers the upper surface of the inner arch portion and the upper surface of the main body portion, and a lower-side surface layer material that covers the lower surface of the main body portion, The ears have an upper-side edge portion including the outer edge of the upper-side surface layer material and a lower-side edge portion including the outer edge of the lower-side surface layer material, The upper-side edge portion and the lower-side edge portion are configured to overlap each other and are joined by hot melt adhesive.

4. A method for manufacturing an insole, which manufactures the insole using a first mold and a second mold, wherein the method for manufacturing the insole is characterized in that the insole comprises: A main body portion which is a flat portion with cushioning property and is configured to face the heel, the medial longitudinal arch portion, and the lateral longitudinal arch portion of the sole; A covering portion, the covering portion being formed in a region of the plantar side surface of the main body portion that faces the medial longitudinal arch portion; And An inner arch portion which is a portion with cushioning property and is configured to cover the covering portion, and the surface on the opposite side of the sole-side surface of the inner arch portion is used as the lower surface, The lower surface of the inner arch portion has a shape adapted to the covering portion, The main body portion and the inner arch portion are made of materials with different hardnesses. The insole further includes an upper surface layer material, which is a sheet-like member that covers the following upper surfaces, where the upper surfaces are the surfaces on the plantar side of the inner arch portion and the main body portion disposed in the covering portion. The first mold has a first portion and a first peripheral portion. The first portion has a shape corresponding to the insole, and the first peripheral portion surrounds the first portion. The second mold has a second portion and a second peripheral portion. The second portion is a concave portion and is configured such that when the second portion faces the first portion, a receiving space is formed between the first portion and the second portion. The second portion has a shape corresponding to the insole, and the second peripheral portion surrounds the second portion. The following object is taken as the heating object. In the heating object, a hot melt adhesive is disposed between the upper surface of the inner arch portion disposed in the covering portion and the upper surface of the main body portion and the upper surface layer material covering the upper surface, and an upper side edge portion is formed on the upper surface layer material so as to surround the upper surface. The manufacturing method of the insole includes: Making the upper surface layer material, the upper surface of the inner arch portion, and the upper surface of the main body portion face the first portion of the first mold, making the lower surface of the main body portion face the second portion of the second mold, and bringing the first peripheral portion and the second peripheral portion close to each other such that the upper side edge portion is located between the first peripheral portion and the second peripheral portion, thereby disposing the heating object in the receiving space formed between the first portion and the second portion; and Heating the heating object disposed in the receiving space by the first mold and the second mold, thereby bonding the upper surface of the inner arch portion and the upper surface of the main body portion to the upper surface layer material.

5. The manufacturing method of the insole according to claim 4, wherein The insole further includes a lower surface layer material, which is a sheet-like member and is a portion that covers the lower surface of the main body portion on the side opposite to the upper surface. In the heating object, a hot melt adhesive is disposed between the lower surface of the main body portion and the lower surface layer material covering the lower surface. The manufacturing method of the insole includes: Disposing the heating object in the receiving space in such a manner that the upper surface layer material, the upper surface of the inner arch portion, and the upper surface of the main body portion face the first portion of the first mold, and the lower surface of the lower surface layer material and the lower surface of the main body portion face the second portion of the second mold; and Heating the heating object by the first mold and the second mold, thereby bonding the upper surface of the inner arch portion and the upper surface of the main body portion to the upper surface layer material, and bonding the lower surface of the main body portion to the lower surface layer material.

6. The manufacturing method of the insole according to claim 5, characterized in that the insole further includes ears provided along the outer edge of the main body portion, the ears have an upper edge portion including the outer edge of the upper surface layer material and a lower edge portion including the outer edge of the lower surface layer material, in the manufacturing method of the insole, when the object to be heated is disposed in the accommodation space, the upper edge portion and the lower edge portion are in a state of overlapping between the first peripheral portion and the second peripheral portion, and a hot melt adhesive is disposed between the upper edge portion and the lower edge portion, the object to be heated is heated by the first mold and the second mold, thereby also joining the upper edge portion and the lower edge portion to form the ears.

7. The manufacturing method of the insole according to claim 4, characterized in that a cutting portion is further provided on the object to be heated, the cutting portion is provided along the outer edge of the upper surface of the main body portion, and the main body portion and the cutting portion are formed as an integral component, in the object to be heated, the upper surface layer material covers the upper surface of the inner arch portion and the upper surface of the main body portion, and the upper edge portion of the upper surface layer material covers the cutting portion, and a hot melt adhesive is disposed between the upper surface layer material and the inner arch portion, the main body portion, and the cutting portion, in the manufacturing method of the insole, in the object to be heated disposed in the accommodation space, the upper edge portion and the cutting portion are sandwiched between the first peripheral portion and the second peripheral portion, the object to be heated is heated by the first mold and the second mold, thereby joining the inner arch portion, the main body portion, and the cutting portion to the upper surface layer material, the manufacturing method of the insole further includes: after joining the inner arch portion, the main body portion, and the cutting portion to the upper surface layer material, cutting and separating the cutting portion from the portion of the upper surface layer material covering the cutting portion.

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