JP3068677U - Inner Soles and Footwear - Google Patents

Abstract

(57) [Summary] [Problem] To provide an inner sole having an air cushion provided on the market as an intermediate product of footwear. SOLUTION: A through hole 4 is formed in a heel portion of a floor material 2 with which a sole contacts, and an air chamber 3 is arranged in a through hole forming portion of the floor material 2,
The peripheral edge of the air chamber 3 and the inner peripheral edge of the through hole 4 are adhered to each other. The air chamber 3 is formed by superimposing a base sheet 5 made of a hard material and an air chamber forming sheet 6 having a bulge. The inner sole A is bonded to the core plate 8 if necessary.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to the inner sole and the footwear with the air cushion on the heel.

[0002]

[Prior art]

 Some footwear has been proposed in which an air cushion is placed on the heel to mitigate the impact. It is divided into what forms.

[0003]

[Problems to be solved by the invention]

 In the above prior art, the former requires large-scale manufacturing equipment to form an air cushion at the same time as forming the grounding bottom, and the latter can be manufactured with relatively simple equipment, but the shape of the air chamber expands up and down. Therefore, there is a disadvantage that molding is difficult. In particular, in the above-mentioned conventional products, there was no idea of providing an air cushion in an inner sole which is distributed on the market as an intermediate product of footwear, and as a matter of course, an inner sole having an air chamber was not distributed.

In view of the above-mentioned problems of the prior art, the present invention provides an inner sole with an air cushion, which is distributed on the market as an intermediate product of footwear, and can be manufactured with relatively simple equipment using the conventional technology. An object of the present invention is to provide an inner sole and footwear in which the disadvantages of molding are improved while taking advantage of the latter.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the present invention is to form a through hole in a heel portion of a floor material with which the sole comes in contact, arrange an air chamber in a portion of the floor material where the through hole is formed, and connect the air chamber to the periphery of the air chamber. The air chamber is bonded to the inner peripheral edge of the through hole, and the air chamber is formed by bonding a base sheet made of a hard material and an air chamber forming sheet having a swelling to each other, and bonding the peripheral edge. For example, the inner sole is configured to be bonded to a core plate.

According to the present invention having the above structure, it is possible to easily provide an inner sole having an air chamber on a heel portion and footwear by relatively simple manufacturing means.

[0007]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment in which a floor member 2 in contact with the sole is made of a polyester non-woven fabric or a synthetic leather obtained by applying and impregnating the same non-woven fabric with polyurethane, and a through-hole 4 is provided in a heel portion thereof. 4 and the inner peripheral edge of the through hole 4 and the outer peripheral edge of the air chamber 3 are bonded to each other by a known means such as an adhesive, high-frequency fusion, and heat and pressure fusion. Is formed.

[0008] The inner sole A is integrated when the ground sole 1 made of polyurethane is foamed, and the upper 7 is bonded to both sides of the ground sole 1 to form footwear. The upper shell 7 can be adhered at the same time when the ground bottom 1 is foamed.

The air chamber 3 is formed by stacking a base sheet 5 made of a hard compounded polyurethane or polyvinyl chloride composition and an air chamber forming sheet 6 made of a soft compounded polyurethane or polyvinyl chloride sheet with swelling. In addition, the peripheral edge is bonded by a known means such as high-frequency fusion, heat and pressure fusion.

In this embodiment, the floor material 2 appears on the surface of the grounding bottom 1, but the flooring 2 may be taken into the grounding bottom 1.

In the description of the air chamber 3, the composition of the base sheet 5 and the air chamber forming sheet 6 is changed to be hard or soft, but hard or soft is selected by selecting the material itself, the molecular weight, and the degree of polymerization. It is also possible that the base sheet 5 does not warp when the air chamber 3 is formed, and only the air chamber forming sheet 6 has a bulge.

FIG. 2 shows a second embodiment, in which a floor member 2 in contact with the sole is made of synthetic leather obtained by applying and impregnating a non-woven fabric with polyurethane, and a heel portion thereof is provided with a through-hole 4. An air chamber 3 is disposed on the floor material 2 and the inner peripheral edge of the through hole 4 and the outer peripheral edge of the air chamber 3 are adhered to each other by a known means such as an adhesive, high frequency fusion, and heat and pressure fusion. A coarse cloth is stuck to a core plate 8 made of a press board provided with an adhesive layer and provided with an adhesive layer, and the periphery thereof is wrapped around the core plate 8 to form an inner sole A ′.

The inner sole A 'is integrated with the upper 7 when the ground sole 1 made of polyurethane is foam-molded to form footwear.

Note that both ends of the upper 7 are inserted between the inner sole A ′ and the grounding bottom 1 to be integrated. The material, structure, and manufacturing procedure of the air chamber 3 are the same as those in the first embodiment.

Next, foam casting of the footwear of FIG. 1 will be described with reference to FIGS. 11 is a lower mold, 12 is an upper mold, and upper and lower molds are connected by a hinge 13 so as to be openable and closable. On both sides of the lower mold 11, a convex surface 14 for forming a recess into which the upper 7 is fitted is formed. The mold 12 is provided with a needle 15 for holding the floor material 2 in contact with the sole, and is provided with a depression 16 for accommodating the air chamber 3.

The upper mold 12 is provided with the floor material 2 integrated with the air chamber 3, and the lower mold 11 is filled with a foamed polyurethane composition, and the upper mold 12 is put on the lower mold 11 by known means. The upper and lower dies 11, 12 are integrated and heated.

The foamed polyurethane composition foams over time and fills in the mold 17. At this time, the floor material 2 and the base sheet 5 of the air chamber 3 are integrated by the inflation pressure, and when foaming is completed, the mold 17 is opened and the grounding bottom 1 where the floor material 2 and the air chamber 3 are integrated is removed. The footwear according to the present invention is obtained by adhesively fixing both ends of the take-out upper 7 to both sides of the ground sole 1. In the case of the second embodiment, when the upper 7 is inserted between the core plate 8 and the grounding bottom 1 and the grounding bottom 1 is foam-formed, it is integrated at the same time.

[0018]

[Effect of the invention]

 As described above, according to the present invention, an inner sole having an air chamber and footwear can be provided simply and easily with relatively simple manufacturing equipment.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment according to the present invention.

FIG. 2 is a longitudinal sectional view of a second embodiment.

3 (a) is a front view and FIG. 3 (b) is a partial sectional view of a mold for manufacturing footwear according to the present invention.

FIG. 4 is an upper mold forming surface view of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grounding sole 2 Floor material which a sole touches 3 Air chamber 4 Through hole 5 Base sheet 6 Air chamber forming sheet 7 Upper 8 Core plate 11 Lower mold 12 Upper mold 13 Hinge 14 Convex surface 15 Needle 16 Depression 17 Form A, A '' Inner sole

Claims (5)

[Utility model registration claims] 1. A through hole is formed in a heel portion of a floor material with which the sole is in contact, and an air chamber is disposed in a portion of the floor material where a through hole is formed. Adhesive inner sole. 2. The inner sole according to claim 1, wherein the air chamber is formed by laminating a base sheet and a swelled air chamber forming sheet and bonding their peripheral edges. 3. The inner sole according to claim 1, wherein the base sheet is made of a material harder than the air chamber forming sheet. 4. The inner sole according to claim 1, wherein the inner sole is bonded to a core plate. 5. A footwear comprising a ground sole, an inner sole, and an upper, wherein the inner sole according to any one of claims 1 to 4 is employed.