JPH0739404A - Sport shoes - Google Patents

Abstract

PURPOSE:To absorb the energy of a shock added from the outside, and improve durability by charging a bent and entangled fibrous elastic resin in a cavity part provided in the heel part of a mid-sole. CONSTITUTION:A sole face part 2 forming the shoe bottom base of a shoe body 1 is formed cut of an out sole 3, an inner sole 4, and a mid-sole 5 interposed between the out sole 3 and the inner sole 4. A cavity part 7 is formed in the heel part 6 of the mid-sole 4. A cavity part 7 is formed in the heel part 6 of the mid-sole the inner part of the cavity part 7. The fibrous elastic resin 8 consists of, for example, polyester fiber, and partial bonded parts 8a are numerously and irregularly formed in the bent state by use of an adhesive to enhance the resistance to a deformation such as compression, tension, bending and twisting, and the toughness of the material is reinforced. Thus, even when a large external force is repeatedly added, the heel part is easily returned to the initial state when the external force is removed, and excellent initial performance can be kept long.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sports shoe having an improved shock absorbing structure.

[0002]

2. Description of the Related Art Conventionally, in this type of sports shoe, for example, a hollow portion is provided in a heel portion of a midsole forming a shoe sole substrate (sole surface portion) of a shoe body, and gas is sealed in the hollow portion. By filling the bag or gel-like material with the same shape as the cavity and using the material characteristics (compression characteristics) of these gases and gel-like materials, the impact at the time of landing is absorbed, and the ankles and knees are absorbed. Some have a configuration that reduces the load on the joints and the like.

[0003]

However, in the sports shoes having such a conventional structure, for example, the one using the bag body in which gas is enclosed, the bag body is liable to be broken due to long-term use. Since it cannot be absorbed, durability is poor.

Further, in a sports shoe constructed by using a gel-like substance, the gel-like substance itself is heavy, so that the whole shoe becomes heavy, which is an obstacle to weight reduction.

Further, in order to promote the weight reduction of the entire shoe, it is conceivable to reduce the thickness of the gel-like substance filling layer or to make it into a porous structure. Absorption capacity is significantly reduced.

Moreover, since the gel-like substance is densely filled in the cavity formed in the midsole, there is a problem that the amount of deformation is small and high impact absorbing performance cannot be expected.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sports shoe capable of improving durability and impact absorbing performance.

[0008]

SUMMARY OF THE INVENTION The present invention is a sports shoe having a midsole interposed between an inner sole and an outsole forming the sole surface of the shoe body as described above. The present invention solves the above-mentioned problems of the prior art by providing a sports shoe in which a hollow portion is provided in the hollow portion, and the hollow portion is provided with a bent and entangled fibrous elastic resin.

[0009]

[Operation] When a strong compressive stress is applied between the outsole and the inner sole such as when landing, the hollow part of the midsole is bent and entangled with the countless fibrous elastic resin. Some parts are compressed, some parts are pulled, some parts are bent, and some parts are twisted, and the energy of the external force that narrows the gap between the outsole and the inner sole is absorbed. At the same time, the energy of the external force is absorbed also by the friction generated between the fibrous elastic resin members that are in contact with each other.

That is, in the sports shoe of the present invention, the impact energy applied from the outside is quickly absorbed by two different mechanisms.
Moreover, since the fibrous elastic resin mounted in the cavity does not have directionality as a whole, impact energy is effectively absorbed regardless of movement in any of the front-back, left-right, and up-down directions. .

Moreover, since a large number of voids remain in the cavity in which the bent and entangled fibrous elastic resin is loaded, it is possible to densely load the gel-like substance into the cavity as before. Compared with other things, it is possible to achieve a significant weight reduction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described in detail with reference to the drawings. FIGS. 1 to 4 show one embodiment of the sports shoe according to the present invention, in which 1 is a shoe body.

The sole surface portion 2 forming the shoe sole substrate of the shoe body 1 has an outsole 3 as shown in FIG.
And an inner sole 4, and a midsole 5 interposed between the outsole 3 and the inner sole 4, and a cavity 7 is formed in a heel portion 6 of the midsole 5. Inside the portion 7, a fibrous elastic resin 8 that is bent and entangled is loaded.

The fibrous elastic resin 8 is made of, for example, polyester fiber, and is partially bonded by using an appropriate adhesive such as natural rubber, synthetic rubber or butyl rubber in a bent state as illustrated in FIG. The parts 8a are formed innumerably and irregularly to enhance resistance to deformation such as compression, tension, bending, and twisting, and strengthen the rigidity of the material.
As a result, even if a large external force is repeatedly received, it becomes easy to return to the initial state when the external force is removed, and excellent initial performance can be maintained for a long period of time.

As a method of bending the fibrous elastic resin 8, there is a method of drawing so that the sectional stress remains nonuniformly.

As a method of loading the fibrous elastic resin 8 into the hollow portion 7 of the midsole 5, for example, as shown in FIG. 3, the midsole member having the concave portion 5a in the concave mold 9A. 5A is set, the fibrous elastic resin 8 having the above-mentioned configuration is inserted into the recess 5a, and the midsole member 5B is placed thereon, and the midsole members 5A and 5B have a predetermined temperature, for example, about 120 ± 10 ° C. In the state of being heated so that the convex side pressing member 9B is pressed into the concave portion of the mold 9A from above with a predetermined pressure, for example, about 1 MPa, and the surfaces of the midsole members 5A and 5B that are in contact with each other are melted. There is a method of joining and encapsulating. Of course, it is also possible to insert the fibrous elastic resin 8 into the recessed portion 5a of the midsole member 5A before setting the midsole member 5A on the mold 9A.

The midsole 5 is generally a foam made of thermoplastic foam rubber, ethylene-vinyl acetate copolymer or the like, and itself has an excellent shock absorbing property.

Further, for example, a shape memory resin (not shown) which is softened at about 60 ° C. is impregnated into the fibrous elastic resin 8 or adhered to the surface of the fibrous elastic resin 8 at, for example, 65 ° C. And press it into the desired shape of the foot mold as shown in FIG.
By cooling to below 50 ° C., for example 50 ° C., and removing from the press machine, it becomes possible to impart a comfortable shape to the heel portion 6 of the midsole 5.

Since the present invention is not limited to the above-mentioned embodiments, various modifications can be made within the scope of the claims.

For example, the fibrous elastic resin 8 may not have the joint portion 8A made of an adhesive, or may be made of the same material as a whole including the joint portion 8A. Absent.

Further, as shown in FIGS. 5 to 7, the fibrous elastic resin 8 loaded in the hollow portion 7 of the midsole 5 is attached to the midsole 5, the outsole 3 or the inner sole 4, or the outsole. 3 and the inner sole 4 may be included.

[0022]

As is clear from the above description, the sports shoe of the present invention is a fibrous elastic material that is bent and entangled in the hollow portion provided in the heel portion of the midsole forming the sole surface portion of the shoe body. Since the body resin is loaded, it is possible to absorb the energy of impact applied from the outside by two different mechanisms, namely deformation and friction of the fibrous elastic body resin, and enclosing the conventional gas. Since it does not break like a bag, durability can be improved.

Moreover, since a large number of voids remain in the hollow portion in which the bent and entangled fibrous elastic resin or the like is loaded, the conventional hollow portion is closely packed with the gel-like substance. Compared with, the weight can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a side view of a notched state of a main part according to an embodiment.

FIG. 2 is an explanatory diagram of a fibrous elastic resin used in one example.

FIG. 3 is an explanatory diagram of a molding method of the midsole used in one example.

FIG. 4 is an explanatory diagram of an example of giving a desired shape to the midsole.

FIG. 5 is an explanatory view of enclosing a fibrous elastic resin with an inner sole.

FIG. 6 is an explanatory view of enclosing a fibrous elastic resin with an outsole.

FIG. 7 is an explanatory view of enclosing a fibrous elastic resin with an inner sole and an outsole.

[Explanation of symbols]

1 ... shoe body, 2 ... sole surface part, 3 ... outsole, 4 ... inner sole, 5 ... midsole, 5A / 5
B ... Midsole member, 5a ... Recessed portion, 6 ... Heel portion,
7 ... Hollow part, 8 ... Fibrous elastic body resin, 8a ... Joining part, 9
A ... Formwork, 9B ... Pressing member.

Claims (1)

[Claims] 1. A sports shoe having a midsole interposed between an inner sole and an outsole forming a sole surface portion of a shoe body, wherein a heel portion of the midsole is provided with a hollow portion, and the hollow portion is bent. The sports shoes are characterized by being loaded with entangled fibrous elastic resin.