JP2002336003A - Shoe sole and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent soles from having unsightly appearance, to enhance a product yield and to make resin plates having functionality appealing to purchases by preventing adhesives from running over from the joint surfaces between the bonded or fused resin plates and upper and lower midsoles or making portions where the molten resin plates and the upper and lower midsoles mingle with each other invisible. SOLUTION: A heel midsole 15 mounted with a resin plate 2 on a lower midsole 11 so as to protrude the resin plate 2 from the side of the lower midsole 11 is constituted. Next, an outsole 3 having a peripheral edge raising portion 31 reaching the lower surface of the resin plate 2 protruding from the lower midsole 11 when the heel midsole 15 is bonded to the outsole 3 is formed and further, an upper midsole 12 covering approximately the entire surface of the outsole 3 is formed and is bonded to put the heel midsole 15 between the upper midsole 12 and the outsole 3, by which the sole is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe sole in which a resin plate is sandwiched between upper and lower mid soles, thereby improving the appearance of the shoe sole by improving the method of manufacturing the shoe sole and improving the manufacturing yield. To try to improve.

[0002]

2. Description of the Related Art The applicant has invented an invention in which a corrugated sheet is sandwiched between upper and lower mid soles as shown in Japanese Patent Application Laid-Open No. H11-203. The present invention prevents an athlete from swaying at the time of landing according to various competition events, thereby suppressing over-return and over-return, and at the same time, secures cushioning properties at the time of landing and prevents a decrease in competitiveness. It has high functionality.

[0003] As a method of manufacturing such a shoe sole,
As described in JP-A-11-203, the following method has been known. First, a flat sheet is bonded to the lower midsole and inserted into a concave mold (cavity).
Next, a convex mold (core) having a corrugated surface on the lower surface is inserted into the concave portion of the cavity and heated and pressed. Thereby, a corrugated surface is formed on the upper surfaces of the lower midsole and the flat sheet. On the other hand, similarly, an upper midsole having a lower surface having a corrugated surface is thermoformed. If the upper midsole and the lower midsole are bonded and integrated, a shoe sole having a corrugated sheet can be obtained.

As another method, the upper surface of the lower midsole and the corrugated sheet are separately formed into a corrugated shape, and then the corrugated sheet is sandwiched between the lower surface of the upper midsole and the upper surface of the lower midsole. It can also be manufactured by bonding and fixing.

Further, as another method, a corrugated sheet is formed by a thermoforming method or an injection molding method, and the formed corrugated sheet is placed in a mold. Next, the polyurethane foam raw material mixed in advance is poured into a mold and foamed in the mold. Thus, the upper midsole and the lower midsole are formed integrally with the upper and lower surfaces of the corrugated sheet.

[0006]

In the molding method as described above, the adhesive overflows from the joint surface between the upper and lower midsole and the corrugated sheet on the side of the shoe where the upper and lower midsole and the corrugated sheet are exposed. Or, the melted upper and lower midsole and corrugated sheet can be seen intermingled with each other, causing a problem that the appearance is uncertain. Such appearance disguise has no problem in the function as a shoe, but cannot be used because it significantly lowers the commercial value, resulting in a decrease in product yield.

A possible solution is to cover the corrugated sheet with an outsole so that the corrugated sheet sandwiched between the upper and lower midsole cannot be seen. However, this has a problem in that it is not possible to appeal the purchaser to the corrugated sheet having the function of the angle.

Therefore, according to the present invention, the adhesive overflows from the joint surface between the bonded or fused sheet material and the upper and lower mid soles, or the melted sheet material and the upper and lower mid soles intersect each other. However, it is an object of the present invention to prevent the appearance from being unsightly, prevent the appearance from being unintelligible, increase the product yield, and make it possible to appeal a functional corrugated sheet to a purchaser. The present invention can be implemented not only when the sheet material is corrugated but also when the sheet material is a flat sheet material.

[0009]

The invention according to claim 1 is characterized in that a midsole sandwiching the resin plate and the midsole are bonded to an outsole so that the resin plate protrudes from a side portion of the lower midsole. And an outsole having a peripheral rising portion extending from the lower midsole to the lower surface of the resin plate.

According to a second aspect of the present invention, in the first aspect of the invention, the resin plate is a shoe sole sandwiched only by a part of the midsole.

According to a third aspect of the present invention, in the invention according to any one of the first to second aspects, the rising portion of the outsole extends to the lower surface of the resin plate protruding from the lower midsole. And a portion that does not reach the lower surface and / or a portion that exceeds the lower surface.

According to a fourth aspect of the present invention, when the resin plate is sandwiched between the midsole so that the resin plate protrudes from a side portion of the lower midsole, and then when the midsole is bonded to the outsole, A method of manufacturing a shoe sole formed by forming an outsole having a peripheral rising portion extending to a lower surface of a resin plate protruding from a midsole and bonding the midsole and the outsole.

According to a fifth aspect of the present invention, there is provided a heel midsole in which the resin plate is mounted on the lower midsole such that the resin plate protrudes from a side portion of the lower midsole. When the midsole is bonded to the outsole, an outsole having a peripheral rising portion extending to the lower surface of the resin plate protruding from the heel midsole is created, and further, an upper mid covering almost the entire surface of the outsole A method for manufacturing a shoe sole formed by forming a sole and bonding the sole to sandwich the heel midsole between the upper midsole and the outsole. The invention of claim 5 constitutes a heel midsole in which the resin plate is mounted on the lower midsole such that the resin plate protrudes from a side portion of the lower midsole. When glued to the outsole, create an outsole having a peripheral rising portion extending from the lower midsole to the lower surface of the resin plate, and further, create an upper midsole covering substantially the entire surface of the outsole. And a method of manufacturing a shoe sole formed by adhering the heel midsole between the upper midsole and the outsole.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, a resin plate is sandwiched between upper and lower mid soles so that the resin plate protrudes from a side portion of a lower mid sole. An outsole having a peripheral rising portion reaching the lower surface of the resin plate protruding from the midsole constitutes a shoe sole.

In the present invention, the term "midsole" simply means a lower midsole, an upper midsole, and a resin plate sandwiched between the lower midsole and the upper midsole. Also, when the resin plate protrudes from the side of the lower midsole,
It means that the resin plate protrudes from the side of the lower midsole.

As a method of sandwiching the resin plate between the upper and lower mid soles, a method in which the lower mid sole and the upper mid sole are separately formed, and the resin plate is sandwiched between them by bonding, There is a method in which the mixed polyurethane foam raw material is injected, foamed, and integrally molded.

There is also a method in which only the lower midsole and the resin plate are integrally formed first. For example, in the embodiment of FIG. 4, the resin plate 2 is bonded to the lower midsole 11 to produce a heel midsole. The method is shown. Another alternative is to use a flat lower midsole 11
The resin plate 2 is adhered to and inserted into the concave mold. Next, a convex mold having a corrugated surface on the lower surface may be inserted into the concave mold, and heated and pressed to form. In the above-mentioned embodiments, the upper midsole is mounted thereafter, so that the resin plate is sandwiched between the upper and lower midsole.

In the above description, the case where the resin plate 2 is corrugated is described. However, it goes without saying that the resin plate 2 may have a flat plate shape or a shape other than a waveform. Nor.

FIG. 5 shows a heel midsole 15 in which the resin plate 2 is joined to the lower midsole 11 described in FIG.
Is a perspective view as viewed obliquely from above on the grounding surface side, and it can be seen that the resin plate 2 protrudes from the lower midsole 11. In this case, in the vicinity of the joining surface 13 between the lower midsole 11 and the resin plate 2, the adhesive has overflowed or the lower midsole 1 has melted.
1 and the resin plate 2 intermingle with each other, so that the appearance is unsightly.

FIG. 1 is a side view of an outer side of a shoe sole showing an embodiment of the present invention, FIG. 2 is a side view of an inner side, and FIG. 3 is a perspective view seen from obliquely above. In the present invention, the heel midsole 15 in which the lower midsole 11 and the resin plate 2 shown in FIGS. 4 and 5 are joined is bonded so as to be sandwiched between the upper midsole 12 and the outsole 3. The bottom is manufactured.

As shown in FIG. 1, the height of the peripheral rising portion 31 of the heel portion of the outsole reaches the lower surface of the resin plate 2 protruding from the lower midsole 11 just placed. Further, since the resin plate 2 is mounted so as to protrude from the lower midsole 11, the adhesive near the joint surface 13 between the lower midsole 11 and the resin plate 2 overflows or melts, and the melted lower midsole 11 and Outsole 3 is where resin plate 2 intersects
Is hidden by the peripheral rising portion 31 of the heel portion of the heel portion, and does not become unsightly. Moreover, since the resin plate 2 sandwiched between the lower midsole 11 and the upper midsole 12 can be seen, the functionality of the resin plate 2 can be appealed to the purchaser.

FIG. 2 is a view as seen from the inner shell side. The peripheral rising portion 32 of the outsole 3 on the inner side of the heel has a height exceeding the resin plate 2 placed on the lower midsole 11. ing. Therefore, the resin plate 2 on the inner back side is
It is not placed so as to protrude from the lower midsole 11. The overflow of the adhesive near the joint surface 13 between the lower midsole 11 and the resin plate 2 and the mixing of the melted lower midsole 11 and the resin plate 2 are caused by the peripheral rising portion 32 of the heel portion of the outsole 3. It hides and does not look ugly. However, in this case, the lower midsole 11 and the upper midsole 12
Cannot be seen, so that the functionality of the resin plate 2 cannot be appealed to the purchaser.

FIG. 6 is a sectional view of the heel portion of the sole of the present invention shown in FIGS. As shown in FIG. 6, on the outer shell side, the peripheral rising portion 31 of the heel portion of the outsole 3 has a height reaching the lower surface of the resin plate 2 protruding from the lower midsole 11 on which it is placed. . On the other hand, on the inner back side, a peripheral rising portion 3 of the heel portion of the outsole 3 is provided.
2 is a resin plate 2 placed on the lower midsole 11
It can be seen that the height exceeds.

The way of sandwiching the resin plate 2 between the upper and lower midsole is not limited to the embodiment of FIG. 6, but may be as shown in FIGS. For example, as shown in FIG.
As shown in FIG. 8, on both the outer and inner shell sides, the peripheral rising portion of the heel portion of the outsole 3 has a height reaching the lower surface of the resin plate 2 protruding from the lower midsole 11, and as shown in FIG. The plate 2 is not placed on the entire surface of the heel, but is placed only on a part of the heel, and the rest of the structure is the same. As shown in FIG. After that, it is also possible to configure similarly.

The protrusion (projection) of the resin plate 2 from the lower midsole 11 is usually about 1 to 5 mm, though it depends on the thickness of the peripheral rising portion of the heel portion of the outsole 3. When the upper midsole is configured to have the same width as the width of the resin plate 2, as shown in FIGS. Of course, this does not prevent the resin plate 2 from being configured to have a different width.

The resin plate 2 may be sandwiched in other ways, and is not limited to the above embodiment. By setting the resin plate 2 in various ways as shown in FIGS. 6 to 9, it is possible to adjust the shock absorbing property of the midsole, the stability at the time of landing, and the like. Further, the outer edge rising portion 31 of the heel portion of the outsole 3 is extended to the lower surface of the resin plate 2 protruding from the lower midsole 11 on which it is placed, a portion not reaching the lower surface, and / or a portion exceeding the lower surface. By combining the above, various changes can be made to the manner of showing the functionality of the resin plate 2 sandwiched between the mid soles.

According to the present invention, a midsole is formed between the upper midsole and the lower midsole so that the resin plate 2 protrudes, and extends to the lower surface of the resin plate 2 protruding from the midsole. An outsole 3 having a peripheral rising portion is formed, and the midsole and the outsole 3 are bonded to each other to form a shoe sole.

As a material for forming the upper and lower mid soles, a soft elastic member having good cushioning properties can be used. Specifically, a foam of a thermoplastic synthetic resin such as an ethylene-vinyl acetate copolymer (EVA) or a thermosetting resin such as a polyurethane (PU), or a rubber material such as butadiene rubber or chloroprene rubber is used. A foam can be used.

The material of the resin plate 2 is a thermoplastic resin such as thermoplastic polyurethane (TPU), polyamide elastomer (PAE) or ABS resin, which is a material having relatively high elasticity, or an epoxy resin or unsaturated polyester resin. A thermosetting resin can be used. Also,
When the resin plate 2 is used for general shoes, a tensile modulus of elasticity of about 10 to 5000 MPa is suitable.

The outsole 3 is made of various rubber materials such as butadiene rubber and isoprene rubber, and is preferably formed by a thermoforming method.

[0031]

According to the present invention, in the resin plate 2 sandwiched between the upper and lower mid soles, the adhesive overflows from near the joint surface 13 between the bonded or fused resin plate 2 and the upper and lower mid soles. Since the melted resin plate and the upper and lower mid soles are not seen intermingled with each other, and the appearance is not uncertain, the product yield can be increased. In addition, since the functional resin plate 2 can be seen, the function of the shoe can be appealed to the purchaser.

[Brief description of the drawings]

FIG. 1 is a side view of an outer side of a shoe sole showing an embodiment of the present invention.

FIG. 2 is a side view of the inner side of the shoe sole of FIG. 1;

FIG. 3 is a perspective view of the configuration of the shoe sole of FIG. 1 as viewed obliquely from above.

FIG. 4 is an explanatory view showing a method for manufacturing a heel midsole.

FIG. 5 is a perspective view of the heel midsole as viewed from obliquely above the contact surface side.

FIG. 6 is a sectional view of a heel portion of the shoe sole of the present invention.

FIG. 7 is a sectional view of the heel of the shoe sole of the present invention.

FIG. 8 is a sectional view of a heel portion of the shoe sole of the present invention.

FIG. 9 is a sectional view of a heel portion of the shoe sole of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Lower midsole 12 Upper midsole 13 Joining surface 15 Heel midsole 2 Resin plate 3 Outsole 31 Peripheral rising part 32 Peripheral rising part

Claims (5)

[Claims] 1. A midsole sandwiching the resin plate so that the resin plate protrudes from a side portion of the lower midsole, and a resin plate protruding from the lower midsole when the midsole is bonded to an outsole. And an outsole having a peripheral rising portion extending to the lower surface. 2. The shoe sole according to claim 1, wherein the resin plate is sandwiched only by a part of the midsole. 3. The rising portion of the outsole has a portion extending from the lower midsole to a lower surface of the resin plate, a portion not reaching the lower surface and / or a portion exceeding the lower surface. 3. The shoe sole according to any one of claims 1 to 2. 4. The resin plate is sandwiched between the midsole such that the resin plate protrudes from a side portion of the lower midsole, and then protrudes from the lower midsole when the midsole is bonded to an outsole. A method of manufacturing a shoe sole formed by forming an outsole having a peripheral rising portion extending to a lower surface of a resin plate and bonding the midsole and the outsole. 5. A heel midsole in which the resin plate is mounted on the lower midsole such that the resin plate protrudes from a side portion of the lower midsole,
When the heel midsole is glued to the outsole,
Create an outsole having a peripheral rising portion reaching the lower surface of the resin plate protruding from the lower midsole, and further create an upper midsole covering substantially the entire surface of the outsole, the upper midsole and the A method for manufacturing a shoe sole formed by adhering the heel midsole so as to sandwich the sole with an outsole.