JP3086614B2 - Multilayer outsole structure of shoes and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayered outsole structure for shoes capable of dissipating heat and humidity trapped inside shoes and a method of manufacturing the same. The present invention relates to a multi-layered outsole structure for shoes capable of dissipating heat and humidity trapped inside shoes by arranging floor leather having excellent heat dissipation and moisture absorption therebetween, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A multi-layered outsole structure of shoes currently used will be described. In general, an outsole structure and a midsole material are used as a material of the outsole. It is well known that a foamed polyurethane is used, or an outsole is made of rubber and a midsole is made of a foamed polyurethane. By the way, when these outsole is injection molded, usually outsole is molded first, and the upper (upper and insole) suspended on the last (foot) is placed above the midsole by the thickness of the midsole. In this method, a mold is held, and a space of the mold is injected and filled with a midsole material. Also, apart from the method of injection filling the midsole,
In some cases, the outsole and the midsole are formed in advance, and the lower surface of the midsole portion and the upper surface of the outsole are bonded by an appropriate method to form the outsole.

[0003]

However, the following problems have been pointed out when molding the outer sole of the above-mentioned multilayer structure. (1) It does not matter much if the outsole material and the midsole material are the same material. However, if the outsole is formed of rubber and the midsole is made of a different material such as polyurethane foam, the adhesiveness is poor. However, there is a problem that it is easy to peel off after molding. (2) Since a release material is adhered to the surface of the outsole to improve the release from the mold after the outsole is formed, when the midsole material is injected and filled on the release material, Adhesion becomes worse. This leads to a decrease in the bonding performance even when the outsole and the midsole are made of the same material. (3) Mold outsole and midsole separately,
Also in the bonding method, since the release material adheres to each of them, the adhesion between the two is naturally poor as in the above. (4) Further, as described above, at the outsole of the multilayer where the outsole and the midsole are bonded to each other, heat is trapped inside the shoe due to poor heat dissipation in the shoe (heat storage). In such cases, the temperature inside the shoe becomes as high as 30 to 50 ° C., resulting in a severe environment for the worker.

[0004] In order to solve the above-mentioned problems, the present invention increases the adhesiveness between the outsole and the midsole and inserts a floor leather excellent in moisture absorption and heat dissipation. By forming a vertical hole reaching the floor leather on the outsole, it is possible to provide a multi-layered outsole structure of a shoe that can prevent heat buildup in the shoe, stuffiness, and furthermore, separation of the outsole and the midsole, and the above-mentioned problems. The purpose is to solve.

[0005]

For this reason, the technical solution adopted by the present invention is characterized in that a floor leather is interposed between an outsole and a midsole of a shoe. A shoe having a plurality of through holes formed in a leather, wherein a plurality of grooves reaching the floor leather are provided in a groove between cleats of an outsole in the shoe according to claim 1 or 2. A shoe characterized by having a vent hole formed thereon, wherein a floor leather is attached in advance to the midsole side surface of the outsole of the shoe, and then the outsole and the midsole are bonded and formed. Further, the shoe is characterized in that floor leather is pasted on the outsole side surface of the midsole of the shoe in advance, and then the outsole and the midsole are adhered and formed. Section It is an unit of resolution.

[0006]

An outsole 2 (or a midsole) is formed, and an outsole 2 (or a midsole) having an appropriately sized floor leather 3 attached to its entire surface or to a predetermined location is formed. Next, a midsole 4 (or an outsole) is formed on the floor leather by an appropriate means, and an outsole having a multilayer structure in which floor leather is interposed between the outsole and the midsole is formed. By interposing floor leather between the outsole 2 and the midsole 4, the problem of peeling between the outsole and the midsole after molding can be completely eliminated. Also, the floor leather itself,
In addition to having good heat dissipation and good hygroscopic properties, the heat inside the shoes, which is generated at the outsole of the multi-layered outsole and midsole just by interposing the floor leather, is confined ( Heat storage) and stuffiness in the shoe can be prevented.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a shoe according to a first embodiment of the present invention, FIG. 2 is a diagram showing an adhesive state between an outsole and floor leather in a state where the outsole is turned over, and FIG. It is a perspective view of the floor leather before making it into a state.

In FIG. 1, reference numeral 1 denotes a multilayered outsole of a shoe according to the present embodiment, and the outsole is formed of an outsole 2, a floor side 3, and a midsole 4. The outsole 2 is formed of rubber, foamed polyurethane or the like, the floor leather 3 is mainly made of cowhide having a thickness of about 1 to 2 mm, and the midsole is formed of rubber, foamed polyurethane or the like. I have. As described above, floor leather is interposed between the outsole 2 and the midsole 4 as shown in FIG.

[0009] The floor leather is interposed between the outsole and the midsole because the surface of the floor leather is fluffy and absorbs the release material adhering to the outsole and the midsole, and at the same time, rubber and foam are used. Most of the materials used for the outsole of shoes, such as polyurethane, make effective use of the property of easily penetrating into the surface layer of the floor leather to improve the adhesive performance, and the floor leather itself has a heat dissipation property. On top of good
This is because the property of good heat absorption is also used to improve heat dissipation. Naturally, a non-woven fabric having properties similar to that of cowhide can be used as the floor leather 3, but cowhide floor leather is used because it can withstand external forces such as breakage during peeling. It is desirable.

As shown in FIG. 3, a plurality of holes 5 can be formed in the floor leather as needed. This hole 5
When the floor leather 3 is bonded to the outsole 2 or the midsole 4, the midsole material 4 is inserted into the mold at the same time as inserting a mold pin in order to prevent the floor leather 3 from shifting. Or when the outsole material 2 is injected,
The filler has a function of intruding into the hole and increasing the adhesive force with the sole on the other side (the figure shows a state in which the midsole 2 has entered the hole). As described above, in the present embodiment, the floor leather 3 is used, so that it is possible to extremely effectively prevent heat buildup and stuffiness in the shoes.

Next, a method of manufacturing the multilayered outsole having the above-described structure will be described. First, as shown in FIG. 2, an outsole 2 (or a midsole) is formed, and an outsole 2 (or a midsole) having an appropriately sized floor leather 3 attached to its entire surface or to a predetermined location is formed. Next, when the outsole is molded by the injection molding method, the outsole to which the floor leather 3 is adhered is in the state shown in FIG. 1, and the upper 6 and the midsole suspended on a last (foot) not shown are placed thereon. 7 upper with midsole 4
The mold is held by providing a gap corresponding to the thickness of the mold, and the midsole material is injected and filled into the gap of the mold. Thus, an outsole having a multilayer structure in which floor leather is interposed between the outsole 2 and the midsole 4 can be obtained. In this case, the floor sole 3 is adhered to the midsole 4 and then formed by injecting the outsole material 2. Similarly, the floor sole 3 is interposed between the outsole 2 and the midsole 4. It is possible to obtain a layered outsole.

When the outsole 2 and the midsole 4 are bonded to form a multi-layered outsole, the floor leather 3 is attached to one of the outsole 2 and the midsole 4 in advance, and both are bonded. It is possible to employ a method of bonding with appropriate means, or a method of interposing floor leather between them and bonding them with appropriate means. In this way, it is possible to obtain a multi-layered outsole structure that has an excellent function of preventing heat buildup and stuffiness in the shoe.

According to the multilayered outsole structure having the above structure, the floor leather is interposed between the outsole and the midsole, so that the outsole and the midsole are formed of different materials, or the injection molding system is used. Even if the outsole is manufactured in any case of the adhesive method, the property of the floor leather, that is, the surface of the floor leather is fluffy, and it absorbs the release material attached to the outsole and midsole well, and the rubber Since most materials used for the outsole of the shoe, such as polyurethane foam, tend to bite into the surface layer of the floor leather, the problem of separation between the outsole and the midsole after molding can be completely eliminated. In addition, the floor leather itself,
In addition to having good heat dissipation and good hygroscopic properties, the heat inside the shoes, which is generated at the outsole of the multi-layered outsole and midsole just by interposing the floor leather, is confined ( Heat storage) and stuffiness in the shoe can be prevented.

Next, a second embodiment according to the present invention will be described. FIG. 4 is a perspective sectional view of a shoe according to the second embodiment.
This embodiment is characterized in that a vent hole 8 is formed in the outsole 2 to reach the floor leather 3 in order to further improve the effects of heat buildup and stuffiness in the shoe. This ventilation hole 8
Is desirably provided in a groove between the cleats 9 formed on the outsole, and the number and size thereof can be arbitrarily selected depending on the shape of the shoe. As described above, since the ventilation hole is formed on the outsole side to reach the floor leather, the heat and humidity in the shoe can be easily discharged out of the shoe through the floor leather → ventilation hole 8.

In each of the above embodiments, the case where the holes 5 are formed in the floor leather has been described. However, the holes of the floor leather need not be provided in some cases, and the number, size and arrangement of the holes are not limited. Naturally, it can be changed arbitrarily according to the shape of the shoe and the like. The number, size, position, and the like of the vent holes formed in the outsole can be changed as necessary. Further, the material of the floor leather is not limited to the cowhide, and any material such as a nonwoven fabric or various sheet materials can be used as long as it has the same properties as the cowhide. The same effect can be obtained even when the floor leather is provided in the middle part of the outsole by any method. The present invention may be embodied in various forms without departing from its spirit or essential characteristics. Therefore, the above-described embodiment is merely an example in every aspect, and should not be construed as limiting. All modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

[0016]

As described above in detail, according to the present invention, since the floor leather is interposed between the outsole and the midsole, when the outsole and the midsole are formed of different materials, or when injection molding is performed. Even if the outsole is manufactured in any of the method and the adhesive method, the problem of peeling of the outsole and the midsole after molding can be completely eliminated. Furthermore, the excellent heat dissipation and heat absorption in the shoe and the stuffiness in the shoe can be prevented by the excellent heat dissipation and moisture absorption properties of the floor leather itself. Excellent effects can be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a shoe having a multilayered outsole according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state where the outsole and floor leather according to the embodiment of the present invention are bonded and turned upside down.

FIG. 3 is a perspective view of the floor leather according to the embodiment of the present invention.

FIG. 4 is a perspective sectional view of a shoe according to another embodiment of the present invention.

[Description of Signs] 1 Multilayer Outsole 2 Outsole 3 Floor Leather 4 Midsole 5 Hole 6 Upper 7 Middle Bottom 8 Vent 9 Cleat

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A43B 1/00-23/30

Claims (5)

(57) [Claims] 1. A multi-layered outsole structure of a shoe, wherein a floor leather is interposed between an outsole and a midsole of the shoe. 2. A multi-layer outsole structure for a shoe according to claim 1, wherein a plurality of through holes are formed in said floor leather. 3. A multi-layer outsole structure for a shoe according to claim 1, wherein a plurality of ventilation holes reaching the floor leather are formed in grooves between the cleats of the outsole. . 4. A method for manufacturing a multi-layered outsole of a shoe, comprising: attaching a floor leather in advance to a surface of a midsole of an outsole of a shoe, and thereafter bonding the outsole and the midsole. 5. A method of manufacturing a multi-layered outsole of a shoe, characterized in that floor leather is previously adhered to the surface of the midsole of the shoe on the outsole side, and then the outsole and the midsole are bonded to each other.