JP6551753B2 - Insole of footwear and insole fitted thereon - Google Patents

Description

  The present invention relates to footwear, for example, insoles in various footwear such as women's shoes such as high heels, pumps, and sandals, men's shoes, and athletic shoes, and insoles to be mounted thereon, and footwear to which these are attached.

  One of the problems often pointed out in the use of shoes is the elasticity and flexibility of the shoes. The foot changes in the process of walking while flexing the joints of the toes and the foot and moves forward and backward. Therefore, if the shoes are too hard, they feel stressed and tired while walking. On the other hand, when the entire shoe is soft, from the foot contact to the flexion of the joints of the toes and feet are not firmly supported, which increases the sense of instability and also feels great stress during walking and is tired.

In the prior art, there are known several techniques for improving the flexibility of the toes and the joints at the joints of the soles to support walking, in particular, the parts where the ball contacts the ball from the toe.
The shoe disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 09-140409), as shown in FIG. 4, includes a rear side lower surface member 16 made of a relatively hard material, a rear side upper surface member 17, and a front side upper surface member 21; The lower surface material 16 and the rear upper surface material 17 are stacked via the shank 18 on the rear side, and the rear lower surface material 16 is provided with a shank 18 which is a hard material and an intermediate material 20 which is a soft material. The rear end portion of the intermediate member 20 is locally sandwiched in a sandwich shape at the front end portion of the rear upper surface member 17. A front upper surface material 21 is attached to the upper surface on the front end side of the intermediate material 20 at a position spaced from the front end of the rear upper surface material 17 by a predetermined distance.

  As described above, the technique of Patent Document 1 has a complicated structure, and a plurality of materials having different hardnesses are combined in a complicated manner. In Patent Publication 1, the rear lower surface material 16 and the rear upper surface material 17 are hard boards called trade name texons, and the front upper surface material 21 is a fiber board, which is a material with high hardness. The intermediate material 20 is a non-woven fabric or the like, which has a relatively low hardness and is easily bent. As a result, although the sticking portion of the front upper surface member 21, the laminated portion of the rear lower surface member 16 and the rear upper surface member 17 is relatively hard and is not easily bent, it is sandwiched between the front upper surface member 21 and the rear lower surface member 16. The portion of intermediate material 20 to be provided is provided as being flexible. Furthermore, at least a part of the bottom surface of the easily bendable material is disclosed a technique for applying a cutting process to promote the bendability.

Next, in the shoe disclosed in Patent Document 2 (Japanese Patent Application Laid-Open No. 2001-61509), as shown in FIG. 5, in the structure of the sole of the shoe, an insole board is disposed on the foot side of the sole. The insole board is divided into a tip portion 1 mainly composed of a toe portion, an intermediate portion 1 b mainly composed of a step portion, and a base end portion 1 c mainly composed of a stepless portion and a buttock portion. It is disclosed that the proximal end portion is formed of a relatively hard material, and the middle portion is formed of a less rigid flexible material. The tip portion, the intermediate portion, and the base end portion are joined by combining the materials provided by different materials having different hardnesses in a subsequent process.
The distal end portion and the proximal end portion are relatively hard materials, and the members are manufactured from materials such as a synthetic resin plate or Texon (trade name), and the middle portion is a flexible material, non-woven fabric or woven fabric It is disclosed that the members are manufactured of cloth, soft resin or the like and joined together. In addition, joining of a front-end | tip part and an intermediate part, and joining of an intermediate | middle part and a base end part are disclosed that joining is carried out so that a level | step difference may not arise by joint cutting.

Japanese Patent Laid-Open No. 03-236801 JP 2001-61509 A

However, the shoes provided with the above-described conventional inflexible insole have the following problems.
The first problem is that it is difficult to form a three-dimensional three-dimensional shape smoothly and continuously from the toes of the sole to the heel because the members having different hardnesses are individually manufactured and joined.
The surface of the sole of the living body is smooth and completely integrated into a three-dimensional shape. An ideal insole needs to have a smooth, fully integrated three-dimensional solid shape along the sole surface.
According to the technique of Patent Document 1 described above, the toes 21, the middle portion 20 including the line from the thumb ball to the pinky ball, the rear lower surface member 16 and the rear upper surface member 17 are clearly and intermittently joined. , Smooth and completely integral three-dimensional solid shape along the surface of the sole. Although the middle portion 20 is designed to have a sandwich structure by the rear lower surface member 16 and the rear upper surface member 17, it is not a completely integrated three-dimensional three-dimensional shape.
According to the technique of Patent Document 2 described above, the distal end portion 1, the intermediate portion 1b, and the proximal end portion 1c are divided and manufactured independently as members having different hardnesses, and then joined in a later step, It is configured and is not a smooth and completely integrated three-dimensional solid shape along the surface of the sole. Although the connection between the front end portion 1, the intermediate portion 1b, and the base end portion 1c is designed to be a joint connection, the joint connection is a joint between two plates which is completely flat and does not change in height. It is difficult to completely and smoothly join in a seamless joint after individually producing three-dimensional three-dimensional shapes rich in unevenness using the technique used in the above.

The second problem is that the manufacturing process is complicated, requiring labor, time and cost.
According to the technique of Patent Document 1 described above, as is apparent from FIG. 4, even if only the insole portion is seen, the toe 21, the middle portion 20 including the line from the thumb ball to the pinky ball, the rear side The lower surface material 16 and the rear upper surface material 17 have obviously a large number of parts, and it is necessary to combine the individually manufactured ones into an assembly processing site, and to join and assemble in a complicated manner in the assembly process. It takes considerable effort, time, and cost to finish a smooth three-dimensional shape along the surface of the sole.
According to the technique of Patent Document 2 described above, as is apparent from FIG. 5, there are three parts in the insole as well, and it is necessary to join them by the technique of two successive joints. is there. Since the number of parts of the three points is a three-dimensional three-dimensional shape rich in unevenness, in order to join in the notched joint, careful detailed work is required over the entire joining surface, and manually, the level difference of the joining point It is also expected that a failure may occur such as peeling of the joint strength of joint joints of joint joints.

  Therefore, the present invention has been made in view of the above problems, and in the prior art, the smooth and completely integrated three-dimensional three-dimensional shape along the surface of the sole which has been insufficient in the prior art is mechanically simple in one step. An insole that has an effect of making it easy to bend the anterior portion including the line from the thumb ball to the hypotheil ball in the formed insole, and increasing the hardness of the posterior portion of the metatarsal to the heel, It is intended to provide insoles and footwear to which they are applied.

In order to achieve the above object, the insole of the footwear of the present invention is to be mounted on the insole body, and includes a front portion including a point at which the ball comes in contact with the ball and the heel An insole of the footwear having a rear portion including a portion where the elastic member abuts, the three-dimensional integrally formed structure having a smooth unevenness along the shape of the sole continuously and integrally from the front portion to the rear portion; The molding material of the front part is different from the molding material of the rear part by color molding, and the hardness of the material of the front part is adjusted to be smaller than the hardness of the material of the rear part. It is easy to bend in the part of the three-dimensional shape that abuts on the small toe ball from the thumb ball, and the part on the three-dimensional shape in which the heel abuts on the metatarsal It has a structure that is easy to keep To.
If a mold along the sole is prepared, it is possible to form a three-dimensional integrally molded structure with smooth unevenness along the sole shape continuously and integrally as a two-color molding, By selecting and molding a material that is injected or pushed out in the front part and a material that has appropriate hardness each in the back part, it is easy to bend in the three-dimensional shape of the ball coming into contact with the little ball A three-dimensionally shaped portion where the heel comes into contact with the foot bone can be easily manufactured by a mechanical manufacturing process that can easily maintain the hardness.

  For example, as the material of the front portion, any material that is harmless to the human body, has elasticity and flexibility, and can adjust the hardness can be adopted. For example, polyethylene terephthalate with adjusted hardness, natural rubber, vinyl chloride, styrene, A butadiene rubber, an isoprene rubber, a urethane rubber material or any combination thereof may be employed. These materials can be adjusted to an appropriate hardness, and can exhibit appropriate hardness and flexibility such as elasticity, flexibility, etc. as an insole of a point where the ball contacts the ball from the ball. The adjustment of hardness can be adjusted by the amount of plasticizer to be added, the temperature at the time of molding, the amount of thermosetting material to be added, and the like.

As the material of the rear part, any material that is harmless to the human body, has elasticity and flexibility, and can adjust the hardness can be adopted. For example, polyethylene terephthalate, natural rubber, vinyl chloride, adjusted to increase the hardness Any of styrene / butadiene rubber, isoprene rubber, urethane rubber material, or a combination thereof can be used. Similarly, these materials can be adjusted to an appropriate hardness, and can exhibit appropriate hardness and flexibility such as elasticity, flexibility, etc. as an insole of a point where the ball contacts the ball from the thumbball. The adjustment of hardness can be adjusted by the amount of plasticizer to be added, the temperature at the time of molding, the amount of thermosetting material to be added, and the like.
In addition, it is necessary to increase the hardness of the rear material. For example, as a reinforcing material, it is possible to use a structure in which a metal or resin rod material having a large hardness is provided in a part of the rear portion. .

In addition, the thickness of the insole can be devised.
If the thickness of the front portion of the midsole is adjusted to be thinner than the thickness of the rear portion, the front portion is easily bent.

Next, the above-described structure can also be provided to the insole below the insole .
In other words, the insole for the footwear of the present invention also has an insole with a front portion including the portion where the small toe abuts from the toe ball and a rear portion including the portion where the heel abuts from the sole of the metatarsal In the insole attached on the body, the three-dimensional integrally molded structure with smooth unevenness along the foot sole continuously and integrally from the front part to the rear part, forming the front part by two-color molding The material of the material and the rear part are different, and the hardness of the material of the front part is adjusted to be smaller than the hardness of the material of the rear part, and the whole is continuous and integrally three-dimensional with smooth unevenness along the foot sole shape A structure that is easy to bend in the three-dimensional shape where it abuts on the ball from the forefoot ball, and it is easy to maintain the hardness at the three-dimensional shape where the heel abuts from the sole of the metatarsal It can also be done.
If a mold along the sole is prepared, it is possible to form a three-dimensional integrally molded structure with smooth unevenness along the sole shape continuously and integrally as a two-color molding, The material can be easily manufactured in a mechanical manufacturing process by selecting and molding a material having an appropriate hardness for the material injected or extruded in the front part and the material injected or extruded in the rear part.

The footwear of the present invention can be provided as including the above-described insole of the present invention.
The footwear of the present invention can be provided as including the above-described insole of the present invention.

  According to the insole of the footwear, the insole of the footwear according to the present invention, and the footwear including them, the three-dimensional integrally formed structure having smooth irregularities along the sole shape is formed continuously and integrally. It is possible to make a structure which is easy to be bent at a three-dimensional shape where a ball comes in contact with a pinky ball as a two-color molding, and a three-dimensional shape where a heel abuts from a metatarsal bone is easy to maintain hardness. Manufacturing can easily be done in a typical manufacturing process.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows simply the structure of the insole body 100 for footwear which concerns on Example 1 of this invention. It is the figure (the 1) which showed an example of the model actually prototyped. It is the figure (the 2) which showed an example of the model actually prototyped. It is a figure which shows the content disclosed by the prior art (Unexamined-Japanese-Patent No. 03-236801). It is a figure which shows the content disclosed by the prior art (Unexamined-Japanese-Patent No. 2001-61509).

Hereinafter, with reference to the drawings, embodiments of the insole, insole, and footwear including them according to the present invention will be described. However, it goes without saying that the scope of the present invention is not limited to the specific application, shape, number and the like shown in the following examples.
Here, although application to women's shoes is described as an example, the present invention can be applied to men's shoes and athletic shoes as well.

As Example 1, the basic configuration of the insole for footwear of the present invention will be described.
FIG. 1 is a view schematically showing the structure of an insole 100 for footwear according to a first embodiment of the present invention. It is an example of women's shoes. 1 (a) is a top view, FIG. 1 (b) is a bottom view, and FIG. 1 (c) is a perspective view.

As shown in FIG. 1, the midsole body 100 for footwear has a structure including a front portion 110, a rear portion 120, and a shank 130.
In addition, although the said structure is not sticking anything on the surface or the bottom, it is possible to stick a non-woven fabric or a sponge material for enhancing cushioning property, and other materials are also used in the present invention. It may be affixed.
The front portion 110 and the rear portion 120 of the midsole 100 for footwear are manufactured by injection molding or extrusion molding integrally by two-color molding.
In FIG. 1, in order to show the difference between the front portion 110 and the rear portion 120, the hatching of the drawing is changed, so that they are clearly different. However, the actual front portion 110 and the rear portion 120 are different. The portion 120 is formed continuously and integrally, and the color and the like can be finished to be the same, in which case the boundary between the two may not be apparent at first glance.

The front portion 110 is a portion including a portion where the small toe ball abuts from the toe ball. FIG. 1 shows the portion roughly, and it can be seen that the front portion 110 includes the portion. Since the metatarsal bone head forms a joint with the small toe ball from the lower part of the metatarsal bone, and the toe is a joint with a large toe flexion at this joint part, the location where the small toe ball abuts from the toe ball is It can be rephrased as a part corresponding to the metatarsal bone head.
The rear portion 120 is a portion that is integrally connected from the front portion, and is a portion that is connected to the contact portion of the heel. Simply put, the rear portion 120 is a portion that seamlessly connects to the rear from the front portion 110.
It is a three-dimensional integrally molded structure with smooth irregularities along the shape of the sole continuously and integrally from the front portion 110 to the rear portion 120.

Here, although the front portion 110 to the rear portion 120 are integrally formed, they are formed by two-color molding, and the molding material of the front portion 110 and the molding material of the rear portion 120 are different.
The molding material of the front portion 110 is a material which is flexible and does not break or tear even if it is repeatedly bent, and its hardness follows the pressure of the bending of the foot at the time of human walking moderately It is sufficient if the hardness is such that it can be bent.
For example, polyethylene terephthalate, natural rubber, vinyl chloride, styrene / butadiene rubber, isoprene rubber, urethane rubber, or the like can be used as a molding material for the front portion 110.

Here, the difference in hardness between the rear portion 120 and the front portion 110 is important. The hardness of the material of the front portion 110 is adjusted to be smaller than the hardness of the material of the rear portion 120.
The front portion 110 is a portion including a portion of a three-dimensional shape that abuts on the ball from the toe ball, and it is necessary to repeat bending at the portion each time the user walks. Therefore, it is adjusted to a relatively soft hardness that is easy to bend, while the second half 120 is a place where the heel abuts from the sole of the metatarsus (the arch), and the three-dimensional shape of the place is the foot or weight. In order to support firmly, it is necessary to maintain a certain degree of hardness. That is, although the front portion 110 is flexible and flexible, the rear portion 120 has elasticity but maintains the hardness not to be easily bent or deformed. Physical properties are finished to be different.

  The adjustment of the hardness can be adjusted by the amount of the plasticizer added to the main materials, the temperature at the time of molding, the amount of the thermosetting material to be added, and the like. If it is adjusted to an appropriate hardness, desired elasticity, flexibility, etc. can be obtained as the front portion 110, and an appropriate hardness and flexibility should be exhibited as an insole of a portion where the small toe ball abuts from the toe ball. it can.

  In this way, while the front portion 110 and the rear portion 120 can be made to have different physical properties, both are seamless, and the whole has a three-dimensional shape with smooth unevenness along the foot sole shape integrally and continuously. It has become. It has a three-dimensional three-dimensional shape that is not flat but uneven at the boundary between the two, and there is no joint, and the whole becomes a three-dimensional shape of smooth unevenness along the foot sole shape continuously and integrally. There is.

  As described above, it is preferable to adjust the thickness of the front portion 110 to be thinner than the thickness of the rear portion 120 as a whole while making it seamless so that there is no joint at the boundary between the two. As the flexibility and flexibility are better when the thickness is smaller, the thickness of the front portion 110 is thinner, and the structural strength that firmly supports the foot and weight is better when the thickness is thicker. It is a device to make it thicker.

  Next, the shank 130 will be described. The shank 130 is a hard material loaded in a part of the rear portion 120. The material is not limited as long as it is a hard material, but in this embodiment, for example, it may be made of steel, a hard plastic resin material, or the like. The shape may be a bar or plate.

The deformation of the insole 100 during walking will be described.
When weight is placed on the toes during walking and the line between the toe ball and the toe ball bends greatly at the foot of the toe, the insole body 100 strikes the toe ball from the toe ball of the front portion 110 Bends flexibly and flexibly at the point of contact. That is, it is possible to follow the bending motion of the toes that is repeated every time walking. On the other hand, since the rear portion 120 has a relatively large hardness and does not bend so much, it firmly supports foot and weight firmly in stepping from the heel landing repeated every time walking.

FIGS. 2 to 3 are diagrams showing an example of an actually produced model.
In the model shown in FIG. 2 to FIG. 3, in order to show the difference between the front portion 110 and the rear portion 120, the color is made different, so the boundary is clearly visible. If the front portion 110 and the rear portion 120 are integrally formed in the same color, it may be that the boundary between the two can not be seen at first glance.
As shown in FIGS. 2 to 3, the molding material of the front part and the molding material of the rear part are different by two-color molding, and the hardness of the material of the front part is adjusted to be smaller than the hardness of the material of the rear part Is a three-dimensional integrally molded structure with smooth asperities along the foot sole continuously in one piece, but it is easy to bend in the three-dimensional shape from the thumb ball to the little ball, from the metatarsus The portion of the three-dimensional shape in which the weir abuts has a structure that can easily maintain the hardness.

Example 2 describes an insole for footwear according to the present invention.
The insole is provided on the upper surface of the insole 100. Some products may further provide a cushioning layer on the insole. Both the insole body 100 and the insole body are names of footwear members and are layered. Therefore, the problem of the flexibility of the ball from the ball to the ball of the ball is the same. Therefore, even in the insole, it is possible to improve the flexibility of the front portion by changing the hardness of the front portion and the rear portion while forming the whole smoothly and integrally along the three-dimensional shape of the sole. May be good. That is, for the insole body, the front portion is required to be able to follow the bending of the toes of walking. Although the foot and weight are firmly supported by the insole 100 in the rear part, it may be said that the rear part of the insole itself should have a certain degree of hardness to firmly support the foot and weight.
Also in the production of the insole, when these materials are formed by injection molding or extrusion using polyurethane rubber, natural rubber, styrene butadiene rubber, isoprene rubber or the like as the material, two-color molding is used in the front as in Example 1. It is possible in the manufacturing process to integrally mold by changing the hardness of the material of the part and the rear part.
Therefore, similar to the insole 100 shown in the first embodiment, the structure has a front portion and a rear portion, and the front portion and the rear portion of the insole are integrally manufactured by injection molding or extrusion by two-color molding. It is good if it is built in and provided as it is.

Example 3 is a footwear including the midsole 100 shown in Example 1. What is necessary is just to assemble and manufacture other members required as footwear, for example, a shoe sole, a heel, the insole body 100 shown in Example 1, an insole, an upper, etc.
Moreover, as Example 3, it can also be provided as footwear including the insole shown in Example 1 and the insole shown in Example 2. It may be manufactured by assembling other members necessary as footwear, for example, shoe sole, heel, insole 100 shown in Embodiment 1, insole 200 shown in Embodiment 2, necessary upper members and the like.

  As described above, the preferred embodiments of the insole for the footwear of the present invention, the insole, and the configuration example of the footwear to which the footwear is applied have been illustrated and described, but various modifications can be made without departing from the technical scope of the present invention. It will be understood that changes are possible.

  The insole for the footwear of the present invention can be widely applied to shoes. For example, the present invention is applicable to various shoes such as high heels, pumps, women's shoes such as sandals, men's shoes, athletic shoes, and the like.

100 insole 110 front portion 120 rear portion 130 shank

Claims (8)

In the insole body mounted on the insole of an article of footwear comprising a front portion including a point at which a ball abuts the ball from the toe and a rear portion including a point at which a heel abuts on the sole of the metatarsus
A three-dimensional integrally formed structure with smooth irregularities along the sole shape continuously and integrally from the front part to the rear part,
The molding material of the front part and the molding material of the rear part are different by two-color molding, and the hardness of the material of the front part is adjusted to be smaller than the hardness of the material of the rear part . Hardness adjusted, polyethylene terephthalate, natural rubber, vinyl chloride, styrene-butadiene rubber, isoprene rubber, urethane rubber material or a combination thereof,
Although the whole is a single-piece structure of the above-mentioned three-dimensional shape provided with smooth unevenness along the above-mentioned foot sole shape continuously integrally, including the part of the above-mentioned three-dimensional shape touching the small toe ball from the thumbball An insole body to be mounted on an insole of footwear , wherein the front portion is easy to bend and the rear portion is easy to maintain the three-dimensional shape. The material of the rear portion is any one or a combination of polyethylene terephthalate, natural rubber, vinyl chloride, styrene butadiene rubber, isoprene rubber, urethane rubber material adjusted to be harder than the material of the front portion An insole according to claim 1, wherein the insole is mounted on the insole of the footwear. The insole body to be mounted on an insole body of footwear according to claim 1 or 2 , wherein a thickness of the front portion is adjusted to be thinner than a thickness of the rear portion. The insole according to any one of claims 1 to 3, which is the lower layer of the insole and includes a front portion including a portion where the ball comes in contact with the thumb and a portion where the heel is in contact with the metatarsus. An insole body of the footwear having a rear portion including: a three-dimensional integrally molded structure with smooth irregularities along the shape of the sole continuously and integrally from the front portion to the rear portion; The molding material of the part and the molding material of the rear part are different, the hardness of the material of the front part is adjusted to be smaller than the hardness of the material of the rear part, and the material of the front part has adjusted hardness, polyethylene terephthalate, natural A rubber, a vinyl chloride, a styrene butadiene rubber, an isoprene rubber, a urethane rubber material, or a combination thereof, and the whole is continuous and integrally three-dimensionally provided with a smooth unevenness along a sole shape It is a structure which is easy to be bent in the part of the three-dimensional shape in contact with the small toe ball from the thumb ball, and the three-dimensional shape in which the heel abuts from the metatarsus is a structure easy to maintain hardness. An insole under the insole characterized by. Polyethylene terephthalate, natural rubber, vinyl chloride, styrene butadiene rubber, isoprene rubber, urethane rubber material, wherein the material of the rear portion of the insole is adjusted to be higher in hardness than the material of the front of the insole The insole in the lower layer of the insole according to claim 4, being any one or a combination thereof. The thickness of the front portion of the insole is adjusted to be smaller than the thickness of the rear portion of the insole, and in the lower layer of the insole according to claim 4 or 5, Bottom body. The footwear including the insole body mounted | worn on the insole body of the footwear in any one of Claim 1 to 3. Footwear comprising an insole under the insole according to any one of claims 4 to 6.