KR20200038834A - Shoe sole with polyhedral cell - Google Patents

Abstract

The present invention relates to a sole and, more specifically, to a hollow polyhedral cell-based sole which has a structure in which a hollow polyhedral cell in the form of a polyhedron with an empty space formed therein as a synthetic resin material is bonded to another hollow polyhedral cell by a hot-melt bonding part, and which does not form voids because only the hot-melt bonding part exists between a plurality of hollow polyhedral cells, wherein a planar structure of the plurality of hollow polyhedral cells bonded to each other has a sole shape.

Description

Hollow polyhedral cell-based soles {SHOE SOLE WITH POLYHEDRAL CELL}

The present invention relates to a shoe sole, and more particularly, to a shoe sole manufactured based on a hollow polyhedral cell in the form of a polyhedron with an empty space formed therein.

A person's foot plays a role in supporting weight when walking or running, so it is directly impacted from the ground. In particular, when exercising, the foot continuously receives an impact equal to several times the weight of the person exercising. Accordingly, wearing footwear that absorbs shock to protect the feet, relieve shock and move freely plays an important role in human health.

Generally, shoes are divided into upper, shoe midsole, and shoe sole.

The shoe midsole is a site for absorbing shock.

The shoe sole is a part that comes into contact with the ground and is generally made of a material that can prevent slipping, and is sometimes omitted.

However, since only the material of the shoe sole, especially the shoe midsole, cannot effectively absorb the impact, it has been conventionally used by attaching an airbag to the heel of the shoe midsole. This is because the heel part of the sole of the foot is the part that receives the strongest impact from the ground.

However, the conventional airbag for shoes has a problem that it may burst or tear when subjected to a severe impact or when exposed to a sharp object.

Due to these problems, the airbag for shoes is generally used only for the purpose of being mounted inside the shoe midsole by insert molding when manufacturing the shoe midsole.

In some cases, the entire shoe sole is proposed as an airbag structure, but in this case, it is difficult to commercialize due to the problem that the shoe sole may easily burst or tear.

On the other hand, Utility Model No. 20-0237469 "Shoe midsole with shock absorbing power and acupressure function" (registered on June 28, 2001) has at least one accommodation space formed inside the midsole having the same shape as the bottom of the foot. , Equipped with an elastic material ball in each receiving space, it is proposed for a shoe midsole having shock absorption due to the gap between the ball itself and the ball that can absorb the expansion of the ball.

However, in the prior art, since the ball freely flows in the receiving space, and the gap between the ball and the ball is also irregular, a product having a precise error range in terms of quality and performance, such as elasticity or hardness, is provided. There is a problem that it is difficult to make.

Utility Model No. 20-0237469 "Shoe midsole with shock absorbing power and acupressure function" (registered on 28. 2001.) Utility Model Registration No. 20-0402582 "Airbag-type midsole" (Registered on November 28, 2005) Patent Publication No. 2003-0029577 "Airbag for shoes" (published April 14, 2003)

The present invention has been devised to solve the problems of the prior art as described above, so that the shoe sole is completed by a plurality of hollow polyhedral cells to maximize the shock absorbing effect, and any one of the hollow polyhedral cells bursts or tears. Even in this case, the structure of the sole is supported by other hollow polyhedral cells, and a new structure of sole is proposed to effectively control elastic and hardness characteristics of the sole by preventing voids from being formed between the hollow polyhedral cells.

In order to solve the above problems, the present invention, an elastic ball for preparing a plurality of elastic balls comprising a synthetic resin inner layer in the form of a ball with an empty space formed therein and a hot melt outer layer formed to cover the outer surface of the synthetic resin inner layer. Preparation stage; An elastic ball loading step of loading the plurality of elastic balls into a shoe sole forming frame; In the vacuum atmosphere, the plurality of elastic balls loaded on the shoe sole forming frame are heat-pressed, and the ball-shaped synthetic resin inner layer of the plurality of elastic balls is deformed into a polyhedron-shaped hollow polyhedral cell in which an empty space is formed by compression. , A hot pressing step in which the hot melt outer layer of the plurality of elastic balls is melted by heating to transform into a hot melt melt filling between the plurality of hollow polyhedral cells; A cooling step in which the hot-melt melt is cooled with a hot-melt adhesive portion by cooling while maintaining a compressed state with respect to the hollow polyhedral cell after the heat-pressing step; A step of removing the shoe sole forming frame to obtain a hollow polyhedral cell-based shoe sole by removing the shoe sole forming frame after the cooling step; It relates to a hollow polyhedral cell-based sole manufactured by a method for manufacturing a hollow polyhedral cell-based sole comprising a.

In another aspect of the present invention, a hollow polyhedral cell in the form of a polyhedron having an empty space formed therein as a synthetic resin material is bonded to another hollow polyhedral cell and a hot melt adhesive unit, but only the hot melt adhesive unit is present between a plurality of hollow polyhedral cells. Therefore, no voids are formed, and the planar structure of the plurality of hollow polyhedral cells adhered to each other is characterized by having a sole shape.

In the above, the shoe sole is divided into a first area located at the rear outside and a second area located at the rear inside and a third area located at the front, based on the top view, and the thickness of the hollow polyhedral cell located in the first area. Is thicker than the thickness of the hollow polyhedral cell located in the second region, and the thickness of the hollow polyhedral cell located in the second region may be thicker than the thickness of the hollow polyhedral cell located in the third region. .

In the above, the sole is divided into a first area located on the rear outside, a second area located on the rear inside, and a third area located on the front, based on the top view, and the hardness of the hollow polyhedral cell located on the first area is The hardness of the hollow polyhedron cell located in the second region may be higher than that of the hollow polyhedron cell located in the second region, and may be higher than that of the hollow polyhedron cell located in the third region.

As described above, the present invention can maximize the shock absorbing effect by completing the sole by a plurality of hollow polyhedral cells, and the structure of the sole by another hollow polyhedral cell even when any one of the hollow polyhedral cells bursts or tears. It can be maintained, and provides a new structure of the sole to effectively control the elastic and hardness characteristics of the sole by preventing voids from being formed between the hollow polyhedral cells.

1 is a cross-sectional view of an elastic ball used in the first embodiment of the present invention,
2 is a conceptual diagram of a state in which a plurality of elastic balls are loaded in a shoe sole forming frame according to the first embodiment of the present invention;
3 is a conceptual diagram of a state in which a plurality of elastic balls loaded on a shoe sole forming frame according to the first embodiment of the present invention are heat-pressed;
4 is a conceptual view of a shoe sole obtained according to the first embodiment of the present invention,
5 is a plan view of a shoe sole according to a second embodiment of the present invention,
6 is a cross-sectional view taken along line AA in FIG. 5.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless otherwise stated.

First, a first embodiment according to the present invention will be described.

1 is a cross-sectional view of an elastic ball used in the first embodiment of the present invention, and FIG. 2 is a conceptual view of a state in which a plurality of elastic balls are loaded in a shoe sole forming frame according to the first embodiment of the present invention, and FIG. 3 Is a conceptual diagram of a state in which a plurality of elastic balls loaded on a shoe sole forming frame according to the first embodiment of the present invention are heat-pressed, and FIG. 4 is a conceptual view of the shoe sole obtained according to the first embodiment of the present invention.

A method for manufacturing a shoe sole according to this embodiment will be described.

(1) Elastic ball preparation step

A plurality of elastic balls 10 are prepared.

In this embodiment, all the soles are completed by the elastic balls 10 having the same material and the same thickness.

As shown in FIG. 1, the elastic ball 10 includes a synthetic resin inner layer 11 having a hollow space 13 formed therein and a hot melt outer layer formed to cover the outer surface of the synthetic resin inner layer 11 ( 12).

The empty space 13 inside the elastic ball 10 is filled with air. However, depending on the embodiment, nitrogen or the like may be filled in the empty space 13 inside the elastic ball 10.

(2) Elastic ball loading step

As shown in Fig. 2, the prepared plurality of elastic balls 10 are loaded on the shoe sole forming frame 20.

The volume of the plurality of elastic balls 10 loaded on the sole forming frame 20 is larger than the volume of the desired sole.

The shape of the shoe sole forming frame 20 may be variously modified according to a desired shape of the shoe sole.

(3) Heat pressing step

The plurality of elastic balls 10 loaded on the sole forming frame 20 are heated in a vacuum atmosphere, and when the hot melt outer layer 12 of the elastic balls 10 starts to melt by heating, the press 30 is applied. As shown in Fig. 3, a plurality of elastic balls 10 loaded on the shoe sole forming frame 20 are compressed.

By heating and pressing in such a vacuum atmosphere, the ball-shaped synthetic resin inner layer 11 in the plurality of elastic balls 10 is transformed into a polyhedron-shaped hollow polyhedral cell 121 in which an empty space is formed by compression. , In the plurality of elastic balls 10, the hot melt outer layer 12 is melted by heating to deform into a hot melt melt 122a filling between the plurality of hollow polyhedral cells 121.

In this way, the synthetic resin inner layer 11 is transformed into a hollow polyhedral cell 121, and the hot melt melt 122a fills the hollow polyhedral cells 121, thereby forming voids between the plurality of hollow polyhedral cells 121. Does not.

In the present embodiment, heat compression is performed in a vacuum atmosphere to effectively prevent voids from being formed between the plurality of hollow polyhedral cells 121.

(4) Cooling step

After the hot pressing step, cooling is performed while maintaining the compressed state with respect to the hollow polyhedral cell 121, so that the hot melt melt 122a is cooled with the hot melt adhesive portion 122b while maintaining the shape of the hollow polyhedral cell 121 as it is.

That is, when natural cooling is performed in the state of FIG. 3, the hot melt melt 122a is solidified by the hot melt adhesive portion 122b.

(5) Step of removing the mold of the sole

After the cooling step, the shoe mold forming frame 20 is removed to obtain a hollow polyhedral cell-based shoe sole 100 as shown in FIG. 4.

That is, the hollow polyhedral cell-based shoe sole 100 has a sole structure in which the flat structure is formed by the hollow polyhedral cell 121 in the form of a sole.

The shoe sole 100 obtained by this embodiment is a synthetic resin material in which a hollow polyhedron cell 121 in the form of a polyhedron with an empty space formed therein is adhered by another hollow polyhedral cell 121 and a hot melt adhesive portion 122b. .

In particular, the sole 100 is a structure in which a void is not formed because only the hot melt adhesive portion 122b exists between the plurality of hollow polyhedral cells 121.

That is, the sole 100 is a very stable structure since all surfaces of the hollow polyhedral cell 121 are bonded to the outer surface of the other hollow polyhedral cell 121 via the hot-melt adhesive portion 122b.

In addition, the sole 100 is composed of a hollow polyhedral cell 121 of the entire sole to maximize the shock absorbing effect.

In addition, even if any one of the hollow polyhedral cells 121 bursts or tears, the shoe sole 100 can maintain the structure of the sole by a certain amount of the hollow polyhedral cells, thereby ensuring safety during walking.

In addition, since the pores are not formed between the hollow polyhedral cells 121, the elasticity and hardness of the sole 100 are affected only by the characteristics of the hollow polyhedral cells 121, so the hollow polyhedral cells 121 ), The elasticity and hardness characteristics of the shoe sole 100 can be effectively controlled.

The sole 100 of this embodiment has the same elasticity and hardness in all parts by using the elastic balls 10 of the same structure and material.

However, preferably, it is preferable to have different hardness and different elasticity depending on the part contacting the sole as follows.

5 is a plan view of a shoe sole according to a second embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along line A-A in FIG. 5.

As illustrated in FIG. 5, the shoe sole 200 according to the present embodiment includes a first zone (ZONE I) located outside the rear and a second zone (ZONE II) positioned inside the rear and a third zone located in the front, based on a plan view. (ZONE III).

In this embodiment, the thickness t1 of the hollow polyhedron cell 121 located in the first region is thicker than the thickness t2 of the hollow polyhedron cell 121 located in the second region, and the hollow polyhedron located in the second region The film thickness t2 of the cell 121 is greater than the film thickness t3 of the hollow polyhedral cell 121 located in the third region.

That is, the plurality of hollow polyhedral cells 121 are all made of the same material, but if the film thicknesses in the order of the first region, the second region, and the third region have a relationship of t1> t2> t3, they are located outside the rear. The first zone (ZONE I) has high elasticity and hardness, and the third zone (ZONE III) located in the front can be designed to have the lowest elasticity and hardness.

In another embodiment, the plurality of hollow polyhedron cells 121 are all of the same size and have the same film thickness, and the hardness of the hollow polyhedral cells located in the first region is higher than that of the hollow polyhedral cells located in the second region. The hardness of the hollow polyhedral cell located in the second region is set to be higher than that of the hollow polyhedral cell located in the third region, so that the first region (ZONE I) located at the rear outside has high elasticity and hardness, and the The zone 3 (ZONE III) can be designed to have the lowest elasticity and hardness.

The above description of the present invention is for illustration only, and a person having ordinary knowledge in the technical field to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. do.

10: elastic ball 11: synthetic resin inner layer
12: hot melt outer layer 13: empty space
20: shoe sole forming frame
30: press
100, 200: Hollow polyhedral cell-based sole
121: hollow polyhedral cell 122a: hot melt
122b: Hot melt adhesive

Claims (4)

An elastic ball preparation step of preparing a plurality of elastic balls comprising a synthetic resin inner layer in the form of a ball with an empty space formed therein and a hot melt outer layer formed to cover the outer surface of the synthetic resin inner layer; An elastic ball loading step of loading the plurality of elastic balls into a shoe sole forming frame; In the vacuum atmosphere, the plurality of elastic balls loaded on the shoe sole forming frame are heat-pressed, and the ball-shaped synthetic resin inner layer of the plurality of elastic balls is deformed into a polyhedron-shaped hollow polyhedral cell in which an empty space is formed by compression. , A hot pressing step in which the hot melt outer layer of the plurality of elastic balls is melted by heating to transform into a hot melt melt filling between the plurality of hollow polyhedral cells; A cooling step in which the hot-melt melt is cooled by a hot-melt adhesive portion by cooling while maintaining a compressed state with respect to the hollow polyhedral cell after the heat-pressing step; A step of removing the shoe sole forming frame to obtain a hollow polyhedral cell-based shoe sole by removing the shoe sole forming frame after the cooling step; Hollow polyhedral cell-based shoe sole manufactured by a method for manufacturing a hollow polyhedral cell-based shoe sole comprising a.
As a synthetic resin material, a hollow polyhedral cell in the form of a polyhedron having an empty space formed therein is bonded to another hollow polyhedral cell by a hot melt adhesive unit, and only a gap between the plurality of hollow polyhedral cells exists so that no void is formed. A hollow polyhedral cell based shoe sole characterized in that the flat structures of the plurality of hollow polyhedral cells adhered to each other have a sole shape.
According to claim 2,
The sole is divided into a first area located on the rear outside, a second area located on the rear inside, and a third area located on the front, based on the plan view, and the thickness of the hollow polyhedral cell located in the first area is the second area. A hollow polyhedral cell, characterized in that it is thicker than the thickness of the hollow polyhedral cell located in the region, and the thickness of the hollow polyhedral cell located in the second region is greater than the thickness of the hollow polyhedral cell located in the third region. Based soles.
According to claim 2,
The shoe sole is divided into a first area located outside the rear and a second area located inside the rear and a third area located in the front, based on the top view, and the hardness of the hollow polyhedral cell located in the first area is the second area. Hollow polyhedral cell based shoe sole, characterized in that higher than the hardness of the hollow polyhedral cell located in, the hardness of the hollow polyhedral cell located in the second area is higher than the hardness of the hollow polyhedral cell located in the third area.

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