JP2001061509A - Split insole board type sole structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the wearer of shoes to easily walk without fatigue and improve the shape retaininability of the shoes by imparting flexibility to the part of a sole on which bending forces work during walking etc. SOLUTION: An insole board 1 placed on the grounding foot face side of a main sole is divided into three parts: a front end portion 1a for an area which corresponds chiefly to a toe part; an intermediate part 1b for an area which corresponds chiefly to a stepping part; and a rear end portion 1c for an area which corresponds chiefly to a non-stepping part and a heel part. The front end portion 1a and the rear end portion 1c are molded from materials of relatively high hardness while the intermediate portion 1b is made from a very flexible material, and the junctions therebetween are formed of half lap joints so as to avoid formation of steps.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sole structure excellent in flexibility.

[0002]

2. Description of the Related Art Conventionally, in a state in which an insole is temporarily fixed to a wooden form, a shell is staken into the wooden form, and a lower peripheral edge of the cover is adhered to a peripheral edge of the intermediate sole. A so-called cemented method of manufacturing shoes in which shoes are manufactured by bonding is known. Techniques for manufacturing highly flexible shoes by such a method include, for example, JP-A-11-46.
A technology such as 804 is known. In this technology, the insole is divided into two parts in the front-rear direction, the front part is made of a flexible member, and the rear part is made of a member with a certain strength. Flexibility is imparted.

[0003]

However, in the above-described technique, the entire front side of the shoe sole becomes flexible, so that, for example, when a large force is instantaneously applied to the toe side, the sole can be stepped on. In some cases, the sole of the shoe sole is molded from a flexible material, and there is a problem in shape retention.

Accordingly, the present invention provides a flexible part at a place where a bending force acts during walking and the like and a certain degree of strength at other parts, so that the part can be easily walked and tired. An object is to provide a shoe sole structure having good shape retention.

[0005]

According to the present invention, there is provided a shoe sole structure in which an insole board is disposed on a foot contact surface side of an outsole. It is divided into a tip part, an intermediate part mainly consisting of a tread, and a base part mainly consisting of a stepless part and a heel part. The tip part and the base end are molded from a relatively hard material. At the same time, the intermediate part was formed from a flexible material having a lower hardness.

Here, the region of the tip portion is a region mainly corresponding to the back of the finger, and the region of the middle portion is a root portion of the toe or a finger to which a stepping force acts mainly during walking or the like. And the base end region is a region corresponding to an arch portion or a heel portion. If the middle part is molded from a flexible material and the other parts are molded from a hard material, the bent part of the foot matches the bent part of the sole, and at the same time the shape other than the bent part of the foot will be shaped. Because it is held, walking and the like can be performed easily, and fatigue can be reduced. In addition, the shape retention of the entire shoe sole is good, and the shape of the shoe is less likely to collapse.

As the material having relatively high hardness at the tip and the base, for example, a cardboard, a synthetic resin plate, a material called Texon (trade name) widely used as a core material of a shoe sole, and the like can be applied. As the material having flexibility in the middle portion, for example, a nonwoven fabric, a woven fabric, a soft resin, or the like can be used.

According to the second aspect, the joint between the distal end and the intermediate part and the joint between the intermediate part and the base end are joined so that a step is not generated due to the cut-out joint.

As described above, by preventing the insole board from being stepped, it is possible to eliminate discomfort and discomfort when the insole board is worn. Here, the method of fixing the discontinuous joint may be by an adhesive, by sewing, or by any other method.

According to a third aspect of the present invention, the outsole is provided with a bending means for easily bending a portion corresponding to a boundary between the toe portion and the tread portion.

If the bending means is also formed on the outsole itself, it is more effective because both the outsole and the insole board have improved flexibility. Here, the bending means of the outsole can be formed by, for example, making a portion corresponding to the boundary between the toe portion and the tread portion of the outsole thinner than the surrounding thickness.

[0012]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a sectional view showing an insole board having a shoe sole structure according to the present invention, FIG. 2 is a plan view of the insole board, FIG. 3 is an explanatory view showing an example of a joining structure of a joining portion, and FIGS. FIG. 6 is an explanatory view showing each example of the bending means of the outsole, and FIG. 6 is an explanatory view showing a comparison between a shoe employing the shoe sole structure according to the present invention and a conventional shoe.

The shoe sole structure according to the present invention is designed to be easy to walk and not to be tired when walking or the like by increasing the flexibility of the sole, and to be hardly deformed. The insole board of the sole has a characteristic.

That is, in the manufacture of shoes by the cemented method, for example, as shown in FIG. 1, after temporarily fixing the insole board 1 to the bottom surface of the last K, the cover 2 is hooked and the core 3 is attached to the insole board 1. After the insole board 1 and the peripheral edge of the insole board 2 and the insole board 1 and the core 3 are bonded to each other, the outsole 4 is fixed by bonding or the like. In this case, in the embodiment, the outsole 4 is formed of a laminate of the midsole 5 and the outsole 6.

At this time, as the conventional insole board 1, a relatively hard material such as cardboard or synthetic resin is often used in order to facilitate processing or prevent deformation of the shoe sole. The hardness of the board 1 is a major factor that hinders the flexibility of the shoe.

Therefore, as shown in FIG. 2, the present invention divides the insole board 1 into three parts in the front-rear direction, and forms a tip 1a mainly composed of a toe and an intermediate part 1b mainly composed of a tread.
And a base portion 1c mainly composed of a stepless portion and a heel portion, and the intermediate portion 1b is formed of a flexible material.

Here, the region of the tip portion 1a is a region mainly corresponding to the sole of the toe, and the region of the intermediate portion 1b is a region at the base of the finger to which a stepping force acts mainly during walking or the like. The region corresponding to the boundary between the toe portion and the tread portion is formed. The region of the intermediate portion 1b is made of a flexible material so that the bent portion of the foot and the bent portion of the insole board 1 match. I can do it.

Incidentally, as the material of the intermediate portion 1b, for example, a nonwoven fabric, a woven fabric, a soft resin, or the like can be applied. As the material of the distal end portion 1a and the proximal end portion 1c, for example, cardboard or Texon (trade name) For example, a material called a synthetic resin having a relatively high hardness may be used.

Here, the joining portion between the distal end portion 1a and the intermediate portion 1b and the joining portion between the intermediate portion 1b and the base end portion 1c are formed into a discontinuous joint structure as shown in FIG. By stitching and joining the joined joint portions, a step is prevented from being generated. At this time, instead of stitching, bonding may be performed by bonding or the like.

The insole board 1 configured as described above
Is disposed on the foot contact surface side of the outsole 4 so that the intermediate portion 1b
The flexibility of the sole of the shoe is increased, and the portion other than the bent portion of the foot is relatively hard, so that the shoe can be easily walked during walking or the like, and the shoe is less likely to lose its shape. Also, since the joints are partially connected, there is no discomfort or discomfort in the soles.

By the way, when the insole board 1 having the above-mentioned structure is used, as shown in FIG. 6 (b), the toe bending degree α at the time of walking is less than 50 degrees. In the present invention, as shown in FIG. 6 (a), the bending degree α can be bent to about 55 to 60 degrees, and the user can easily walk.

By the way, in addition to the structure of the insole board 1 as described above, it is more effective to form a bending means on the outsole 4 itself. 4 and FIG. Here, (a) of FIGS. 4 and 5 is a side view of the shoe sole, and (b) is a bottom view.

When the midsole 5 and the outsole 6 are joined, the bending means 7 shown in FIG. 4 divides the outsole 6 into three parts (6a, 6b, 6c), and the space between the toe outsole 6a and the stepping outsole 6b. To form a gap x,
This is an example in which a gap y is formed between the treading outsole 6b and the non-stepping / heel outsole 6c, and grooves 5x, 5y are formed on the back side of the midsole 5 corresponding to the gaps x, y. In this example, the thickness of the outsole 4 in the gaps x and y portions is reduced and the flexibility is enhanced, and the flexibility can be further improved in combination with the structure of the insole board 1.

The bending means 7 shown in FIG.
A fitting recess 5d is formed at a position corresponding to the tread portion of the midsole 5, a fitting protrusion 6t is formed on the outsole 6, and the fitting recess 5d and the fitting protrusion 6t are fitted.
And the outsole 6 are laminated, and the concave grooves 6x and 6y are formed on the back side of the fitting convex portion 6t. The thickness of the concave grooves 6x and 6y of the outsole 6 is reduced and bent. It is a thing that raised the character. Also in this case, the flexibility of the outsole 4 and the insole board 1 can be further improved.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, the tip 1a, the middle 1b, and the base 1c of the insole board 1
Is arbitrary, and the bending means 7 of the outsole 4 is an example.

[0026]

As described above, according to the present invention, the insole board disposed on the sole of the shoe is provided with a tip portion mainly composed of a toe portion,
It is divided into an intermediate part mainly composed of a tread part and a base part mainly composed of a non-step part and a heel part, and the distal part and the proximal part are formed from a material having relatively high hardness. Because the part is molded from a flexible material with lower hardness, the bent part of the foot matches the bent part of the sole, and at the same time the shape is retained except for the bent part of the foot, so walking etc. is easy The fatigue is reduced, and the shape retention of the entire shoe sole is improved. Also, if the joint between the distal end portion and the intermediate portion and the joint portion between the intermediate portion and the proximal end portion are joined so as to prevent a step from being generated due to a discontinuous joint, discomfort and discomfort when worn are provided. Can be eliminated. Further, if the outsole is provided with bending means for facilitating bending of a portion corresponding to the boundary between the toe portion and the tread portion on the outsole, both the outsole and the insole board have good flexibility. Be more effective.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an insole board having a shoe sole structure according to the present invention.

FIG. 2 is a plan view of an insole board.

FIG. 3 is an explanatory view showing an example of a joining structure of a joining portion.

FIG. 4 is an explanatory view showing an example of an outsole bending means;
Is a side view of the outsole, and (b) is a bottom view

FIG. 5 is an explanatory view showing another example of the bending means of the outsole;
(A) is a side view of the outsole, (b) is a bottom view

FIG. 6 is an explanatory view showing a comparison between a shoe adopting the shoe sole structure according to the present invention and a conventional shoe, wherein (a) is the present invention and (b) is the conventional.

[Explanation of symbols]

1 ... insole board, 1a ... tip part, 1b ... middle part,
1c: Base end, 4: Outsole, 5: Midsole, 6: Outsole, 7: Bending means.

Claims (3)

[Claims] An insole board having an insole board disposed on a foot contact surface side of an outsole, wherein the insole board has a tip portion mainly including a toe portion and an intermediate portion mainly including a tread portion. And a base part mainly composed of a stepped part and a heel part. The tip part and the base part are molded from a relatively hard material, and the middle part is lower in hardness. An insole board split type shoe sole structure characterized by being formed from a flexible material. 2. The insole board split type shoe sole structure according to claim 1, wherein a joining portion between the front end portion and the intermediate portion,
And a joint part between the intermediate part and the base end part is joined so that a step is not generated due to a discontinuous joint. 3. An insole board split type shoe sole structure according to claim 1 or 2, wherein the outsole is provided with a portion corresponding to a boundary between a toe portion and a tread portion to be easily bent. An insole board split type shoe sole structure provided with bending means.