JPH09150466A - Shoes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure capable of rationally realizing the flattening of an upper bottom surface and the formation of a shank in shoes having a shoe sole made of a synthetic resin obtained by injection molding. SOLUTION: The peripheral edge part 1a on the shoe sole side of upper 1 is pulled over to be fastened to the fastening recessed part 2a of the insole 2 fixed to the opening part of the bottom surface of the upper 1 and a shank molding recessed part 5 is formed to the rear part of the bottom surface of the insole 2 and a shoe sole 3 made of a synthetic resin is formed on the bottom surface part of the upper 1 by injection molding. Then, the shoe sole 3 and the shank 6 are integrally molded and the wall thickness of the front part of the shoe sole 3 is partially reduced by a lightweight material 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe, and more particularly, to an improvement in a shoe made by injection molding a synthetic resin shoe sole on a bottom surface of an upper.

[0002]

2. Description of the Related Art Conventionally, shoes such as soccer shoes and golf shoes are constructed by providing a sewn leather upper 101 with a synthetic resin sole 103 as shown in FIG. The above-mentioned shoe 100 is formed by sewing an upper member made of leather or the like to form an upper 101 and then shaping the upper 101 into a desired shoe shape. And the upper 10
The insole 102 is fixed to the bottom opening of the first insole 10.
The peripheral edge of the shoe sole of the upper 101 described above is suspended and adhered to the outer peripheral portion of the bottom surface of 2.

A synthetic resin shoe sole 103 is formed by injection molding on the bottom surface of the upper 101, that is, the exposed portion of the lower surface of the insole 102 and the hanging portion 105.

In some shoes constructed as described above, a shank (a wick core) may be provided on the hem of the shoe sole. The shank 106 is for supporting the load applied to the arch portion of the sole of the shoe sole and for maintaining the shape. Conventionally, the shank is configured as a leaf spring that is bent in a band-shaped steel plate and curved in an arch shape, and is provided so as to be incorporated in the insole 102 in the foot portion.

However, as described above, the shank 106
The shoe 100 provided with means that the weight of the shoe itself increases and the manufacturing process becomes complicated. Therefore, in the case where the shoe sole 103 is made of synthetic resin as described above, one or a few shoes are arranged along the foot of the bottom surface of the shoe sole 103 as in the shoe 100 'shown in FIG. It is common to give the function similar to that of the shank 106 by forming the streak portion 107 so as to project.

[0006]

As described above, the shoe sole 1
In the shoes 100, 100 'in which 03 is molded with a synthetic resin, the center of the bottom surface of the upper 101, which is in contact with the front upper surface of the shoe sole 103 formed by injection, is surrounded by the suspending portion 101a. It is formed to be recessed by the thickness of the recess 101a. Therefore, the shoe sole 103 formed in contact with the bottom of the upper 101 has a particularly thick center portion corresponding to the recess, resulting in an increase in weight and a decrease in flexibility. .

Therefore, in the prior art, a padding member having substantially the same thickness as the suspending portion 101a is attached to the central portion of the bottom surface of the upper 101 to correct the bottom of the upper 101 into a substantially flat surface, and then the shoe. By injection molding the sole 103, the sole 1
The thickness of 03 was prevented from becoming unnecessarily thick (not shown). As a matter of course, adding the correction process using the filling member as described above causes an increase in manufacturing labor and an increase in cost. Further, if the bottom surface of the upper 101 is flattened and the thickness of the sole 103 is made uniform as described above, the resilience of the tread portion is insufficient. Therefore, it is necessary to provide a streak portion that functions like a shank in the tread portion. However, as described above, in order to additionally form the streak portion 107 on the lower surface of the shoe sole 103, it is necessary to add a new process to the mold used to mold the shoe sole 103. Therefore, new costs will be increased.

It is an object of the present invention to provide a shoe having the above-mentioned structure, which can reasonably realize the flattening of the bottom surface of the instep and the formation of the shank.

[0009]

In order to achieve the above object, the present invention places an insole in a bottom opening of a substantially shoe-shaped upper skin, and places the insole on the outer periphery of the bottom of the insole. In a shoe formed by suspending the shoe bottom side peripheral portion of the instep and injection-molding a synthetic resin shoe bottom on the instep bottom portion, in a substantially upper portion of the instep suspended portion along the outer periphery of the bottom surface of the insole. A fastening recess corresponding to the thickness is formed with a predetermined width, and a hanging portion of the upper is hung and fixed in the fastening recess, and a shank forming recess is provided in the shank portion on the bottom surface of the insole. A shoe bottom made of synthetic resin is injection-molded on the bottom surface of the instep, and the shoe sole and the shank formed in the shank molding recess are integrally molded.

According to the above-mentioned means, the following actions are involved. The bottom side peripheral edge of the instep formed into a substantially shoe shape is fastened in a suspended state along the outer periphery of the bottom of the insole placed in the bottom opening of the instep. Along with the outer periphery of the bottom surface of the insole, a fastening recess corresponding to the thickness of the upper skin hanging portion is formed with a predetermined width. As described above, the peripheral edge portion on the bottom surface side of the upper, that is, the hanging portion is hung and fixed in the fastening concave portion. The thickness of the hanging portion of the upper shell suspended in the fastening recess is offset by the depth of the fastening recess to be substantially flush with the bottom surface of the insole. In addition, a shank forming recess is formed in the shank portion on the bottom surface of the insole.

Thus, when the shoe bottom made of the constituent resin is injection-molded on the bottom surface of the instep, as the outer shape of the shoe sole is molded, the resin flows into the shank molding recess of the tread portion to integrally form the shank. On the other hand, since the bottom surface of the instep is flush with the parts other than the foot part of the shoe sole, a uniform wall thickness can be obtained. In addition, the synthetic resin shoe sole and shank injection-molded as described above are entirely fixed to the bottom surface of the instep.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. A shoe a shown in FIGS. 1 to 3 is a soccer shoe embodying the present invention. In this soccer shoe, a leather upper 1 is formed, an insole 2 is placed in the bottom opening of the upper 1, and a sealing sheet 4 is attached to the lower surface of the insole 2. A synthetic resin shoe sole 3 is injection-molded on the bottoms of the leather 1 and the insole 2. Also, the above insole 2
A recess 5 for shank molding is provided on the bottom of the bottom of the shoe, a lightweight material 7 is attached to the front part of the bottom of the insole 2, and the shoe sole 3 is injection molded on the bottom of the upper 1 at the same time. A shank 6 which is integrated with the shoe sole 3 is formed inside the recess 5, and a thin portion is formed in the front portion of the shoe sole 3 by interposing the lightweight material 7.

The upper 1 is made by cutting a leather material such as cow or kangaroo according to the shape of each part of the shoe and sewing the skins of these parts together with the lining etc. Configure. Upper 1 sewn as described above
Is formed into a substantially shoe shape by forming a habit in a state where the peripheral edge portion on the sole side is folded inward. As described above, the peripheral portion of the upper 1 that is folded into the bottom side forms the hanging portion 1a. The insole 2 is fitted into the bottom opening of the upper 1, and the hanging portion 1 described above is provided along the peripheral edge of the bottom of the insole 2.
Suspend and bond a.

The above-mentioned suspending work will be described in detail with reference to FIGS. 4 and 10. At the time of manufacturing, the upper 1 having the above-mentioned constitutional habit has a foot outer shape as shown in FIG. It is fitted upside down with respect to the last c formed corresponding to. An insole 2 made of paper, synthetic leather or the like is placed in close contact with the bottom surface of the last c, and the insole 2 is fitted into the bottom opening of the upper 1.

The insole 2 is constructed by cutting hard paper or synthetic leather having a thickness of about 3 mm into a shoe sole mold, and a fastening recess 2a having a predetermined width is formed along the outer periphery of the bottom surface. is there. The fastening recess 2a is a recess formed one step lower than the bottom surface of the insole 2. In the case of the present embodiment, the insole 2 cut into a shoe sole mold is placed on a flat surface with the bottom surface facing up. It is formed by pressing the outer peripheral surface of the bottom surface of the bottom 2 from the bottom surface side with a mold formed in conformity with the shape of the fastening recess 2a and compressing.

In the case of the insole 2, the wall thickness of the portion corresponding to the fastening recess 2a is compressed by pressing to approximately 1/2,
The depth of the fastening recess 2a thus formed is substantially the same as the leather thickness of the hanging portion 1a of the upper 1. Then, the hanging portion 1 is placed in the fastening recess 2a.
When a is applied to the fastening recess 2a and adhered, the surface of the hanging portion 1a and the bottom surface of the insole 2 are configured to be substantially flush with each other.

As shown in FIG. 6, the suspending portion 1a of the upper 1 fitted to the last c is adhered by applying an adhesive and suspending it in the fastening recess 2a on the outer peripheral portion of the insole 2. Then, use nails or the like (not shown) to fix it. The width of the fastening recess 2a is set to be substantially the same as or slightly wider than the hanging portion 1a so that the hanging portion 1a of the upper 1 is applied and adhered. Further, the fastening recess 2a is formed to have a depth substantially the same as the leather thickness of the upper 1 suspending portion 1a, and when the suspending portion 1a is applied to the fastening recess 2a and fixed as described above, The surface of the hanging portion 1a and the bottom surface of the insole 2 are substantially flush with each other. That is, the upper 1
At the outer peripheral portion of the bottom surface portion, there is no step in the hanging portion 1a, and flattening is achieved.

Further, the insole 2 has a shank forming recess 5 having a depth of about half of the wall thickness formed by press forming on the bottom of the bottom. The shank molding recess 5 is the sole 3
Simultaneously with the injection molding of (1), it is a recess for molding the shank 6 so as to bite into the bottom surface of the insole 2, and is formed in a strip shape along the ridge on the lower surface of the insole 2 (FIG. 4). still,
It is efficient to press-form the shank forming recess 5 and the fastening recess 2a at the same time when punching the outer shape of the insole 2.

A lightweight material 7 is bonded between the foot portion and the toe portion on the bottom surface of the insole 2. The lightweight material 7 is formed by cutting synthetic leather or the like slightly smaller than the outer shape of the bottom of the upper 1 and is bonded to the center of the front part of the insole 2 (FIG. 4). The above-mentioned lightweight material 7 may be made of a material other than synthetic leather as long as it is a material that is relatively lightweight and flexible and can withstand the heat and pressure during injection molding. Etc. may be used.

By the way, the above-mentioned lightweight material 7 is set thicker than the thickness of the hanging portion 1a of the upper 1. Therefore,
As described above, in a state in which the upper skin 1 suspending portion 1a is suspended and fixed to the outer periphery of the bottom surface of the insole 2, a predetermined amount, for example, about 1 to 2 mm, protrudes from the suspending portion 1a of the upper skin 1 bottom surface. Is made to do.

That is, the lightweight material 7 is intended to partially raise the bottom surface of the upper 1 by protruding it from the bottom surface of the substantially uniform upper 1. When the shoe sole 3 is injection-molded on the bottom surface of the leather 1, the shoe sole 3
The wall thickness at the center of the front part is partially thinned. The thickness of the light-weight material 7 is set according to the amount of raising the bottom, and is, for example, about 1 to 2 mm.

The suspended portion 1a on the bottom surface of the upper 1 is buffed to finely roughen the surface of the material to which the shoe sole 3 is bonded.

Next, as shown in FIGS. 6 and 7, a sealing sheet 4 is adhered to the bottom portion of the insole 2 exposed from the upper shell hanging portion 1a.

The sealing sheet 4 is made of synthetic fiber cloth, and is cut into a shoe sole shape having an outer shape slightly smaller than the bottom surface of the upper 1. The sealing sheet 4 is coated with an adhesive on both sides and adheres to the bottom surface of the upper 1 in the above state, that is, the exposed portion of the insole 2 and the hanging portion 1a of the upper 1 (FIGS. 7 and 8).
By attaching the sealing sheet 4, the fastening recess 2a
The edge portion of the hanging portion 1a fixed to the above is covered to seal the gap generated in the portion. Also, the shank forming recess 5
The sealing sheet 4 which covers the inner surface of the recess 5 and the lightweight member 7
Then, the sheet 4 and the light-weight member 7 are adhered to each other in a state of being closely adhered to each other, and after the sheet 4 is adhered, the concave shapes of the concave portion 5 and the light-weight material 7 are left in a substantially original shape.

A mold d for injection molding is closely adhered to and bonded to the bottom surface of the upper 1 to which the sealing sheet 4 is adhered, and a molten resin is injection molded (FIGS. 9 and 10). As a result, the shoe sole 3 made of synthetic resin is integrally molded with the bottom surface of the upper 1 that is flattened without the step of the hanging portion 1a.
At this time, the shoe sole 3 is molded by the molten synthetic resin injected into the mold d, and at the same time, the molten synthetic resin also flows into the shank molding concave portion 5 on the lower surface of the insole 2 and inside the concave portion 5. The shank 6 is molded. The shank 6 is formed integrally with the shoe sole 3, and is fitted in a shank forming recess 5 formed along the insole of the insole 2.

The front part of the shoe sole 3 is formed by injection molding.
The corresponding portion of the front portion of the shoe sole 3 is formed thinner than the other portions by the protrusion of the lightweight material 7. The protrusion of the lightweight material 7 is joined to the upper surface of the injection-molded shoe sole 3 in a fitted state.

The shoe sole 3 injection-molded as described above is entirely fixed to the bottom surface of the upper 1 by the adhesiveness of the molten synthetic resin. Further, by providing the lightweight material 7 on the bottom surface of the upper 1, it is possible to remove an excessive thickness from the front part of the shoe sole 3, so that the flexibility required for the front part of the shoe sole 3 can be effectively improved and at the same time, It is possible to reduce the weight of the shoe sole 3. Further, the convex portion of the shank 6 which is integrated with the shoe sole 3 is fixedly fitted in the shank forming concave portion of the insole 2, and the protrusion of the lightweight material 7 projecting to the bottom surface of the upper 1 is the sole 3. It will be in a state of being fitted to the upper surface of. Therefore, the injection-molded shoe sole 3 is entirely adhered to the bottom surface of the upper 1 through the unevenness of the shank 6 and the lightweight material 7 so as to adhere to the bottom of the upper 1 as a result. The fixing force of the bottom 3 can be increased.

The shoe a2 shown in FIG. 11 is constructed in the same manner as the shoe a described above, except that the suspending portion 1a of the upper 1 and the insole 2 are formed.
A through hole 8 penetrating the outer peripheral portion is bored, and a pin portion 9 integrally projecting from the peripheral portion of the upper surface of the shoe sole 3 is fitted into the through hole 8. Several pin portions 9 are provided along the toe portion and the heel portion of the shoe sole 3. Pin portion 9 described above
When injection molding the shoe sole 3, the molded synthetic resin flows through the shoe sole 3 into the through hole 8 so that the shoe sole 3 is integrally formed with the shoe sole 3 like the shank 6. In the shoe a2 configured as described above, the binding force of the pin portion 9 is added together with the binding force of the unevenness of the shank 6 and the lightweight material 7, and the fixing force of the shoe sole 3 to the bottom surface of the upper 1 is more effective. Can be improved.

In the shoes a and a2 of the above-mentioned embodiment, the fastening recess 2a is provided along the outer peripheral portion of the bottom surface of the insole 2.
Is formed in parallel with the bottom surface of the insole 2 and in a stepped shape. The fastening concave portion is formed by suspending the hanging portion 1a of the upper 1 and fixing the hanging portion 1a. Any shape can be used as long as it can be eliminated, for example, the wall thickness of the outer peripheral edge portion of the shoe sole 2 can be changed to a tapered shape, or the cross section of the tapered portion can be changed. It may be curved in a concave shape.

Further, in the shoes a and a2 of both of the above-mentioned embodiments, the shank 6 is formed in a single band shape along the foot portion on the bottom surface of the upper 1, but the shape of the shank is limited to the above. However, the width, length, and outer peripheral shape can be freely set by changing the shape of the shank forming recess. Further, the number of shanks is not limited to one, and two or more shanks may be provided along the ridge portion of the insole 2. Similarly, the lightweight material that projects to the front part of the bottom surface of the upper 1 may be provided in a state of being divided into two or more pieces, and the shape may be arbitrarily changed. The shank 6 is provided in the range of the rear part of the shoe sole including the foot part, and the lightweight material 7 is provided in the range of the front part of the shoe sole including the foot part. Within this range, the shank 6 may be provided at any position. It is optional.

According to the gist of the present invention, the above lightweight material 7 may not be provided on the bottom surface of the upper 1. Further, in the above embodiment, the shoe sole 3 is injection-molded after the sealing sheet 4 is attached to the bottom surface of the upper 1, but the attaching of the sealing sheet 4 may be omitted. Further, although the shoes in the above-described embodiments are soccer shoes, the present invention may be any kind of shoes as long as the soles are injection-molded with synthetic resin.

[0032]

As described above, in the shoe of the present invention, a fastening recess is formed along the outer periphery of the bottom surface of the insole, and the shoe bottom side peripheral edge of the upper is hung in the recess for fastening. Therefore, in the state in which the fastening of the hanging portion is completed, the step of the hanging portion can be eliminated and the bottom surface of the upper can be made flat. At the same time, a shank forming recess is formed in the shank of the bottom surface of the insole. Therefore, when injection-molding a shoe bottom made of synthetic resin on the bottom surface of the instep, by flattening the shoe bottom, the thickness of the shoe sole is made substantially constant, and at the same time, the shoe sole is formed in the molding recess. An integral shank can be formed. Also, according to the shoe of the present invention, it is not necessary to attach a packing member to the bottom surface of the instep to correct the step of the hanging portion as in the conventional case, and the shank is formed on the mold for molding the shoe sole. Since it is not necessary to perform a new process for molding, the labor and cost at the time of manufacturing can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a shoe embodying the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a perspective view showing an insole.

FIG. 5 is a perspective view showing the last and the upper.

FIG. 6 is a perspective view showing a state where a hanging portion of the upper is hung around the insole.

FIG. 7 is a perspective view showing a state in which a sealing sheet is attached to the bottom of the instep.

FIG. 8 is a perspective view showing the upper skin with a sealing sheet attached.

FIG. 9 is a vertical cross-sectional view showing a state in which a shoe sole is injection-molded on the bottom surface of the upper.

10 is a sectional view taken along line XX in FIG.

FIG. 11 is a vertical cross-sectional view showing a shoe in which a pin portion is fixed to the upper part hanging portion and the outer periphery of the insole.

FIG. 12 is a vertical cross-sectional view showing a conventional shoe including a shank.

FIG. 13 is a vertical cross-sectional view showing a conventional shoe having a shoe sole with a streak portion.

[Explanation of symbols]

 a ... shoe 1 ... upper 1a ... hanging part 2 ... insole 2a ... fastening recess 3 ... shoe sole 5 ... shank molding recess 6 ... shank 7: Lightweight material

Claims (1)

[Claims] 1. An insole is placed at the bottom opening of a substantially shoe-shaped upper, and the outer periphery of the bottom of the insole hangs the peripheral edge of the upper side of the upper, and the bottom of the upper is hung. In a shoe formed by injection molding a shoe bottom made of synthetic resin, a fastening recess corresponding to the thickness of the upper shell hanging portion is formed with a predetermined width along the outer periphery of the bottom surface of the insole, The hanging part of the upper is hung and fixed in this fastening recess, and a shank forming recess is formed in the shank on the bottom of the insole, and a synthetic resin shoe sole is injected on the bottom of the upper. A shoe formed by integrally molding the shoe sole and the shank formed in the shank molding recess.