JP3241249B2 - shoes - Google Patents

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 have a structure in which a synthetic resin shoe sole 103 is provided on a sewn leather upper 101 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
1. An insole 102 is fixed to the bottom opening of
The outer periphery of the shoe sole of the upper 101 is suspended and bonded to the outer periphery of the bottom surface 2.

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

[0004] In some shoes configured as described above, there is a case where a shank (a whip core) is provided at a foot of a 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 quenched into a strip-shaped steel plate, configured as a leaf spring that is warped in an arch shape, and provided in a form that is incorporated into the midsole 102 in the stub.

However, as described above, the shank 106
The shoe 100 provided with increases the weight of the shoe itself and complicates the manufacturing process. Accordingly, in the case where the sole 103 is made of a synthetic resin as described above, one or several of the soles 103 are formed along the foot of the lower surface of the sole 103 as shown in a shoe 100 'shown in FIG. It is general that the same function as that of the shank 106 is provided by forming the streaks 107 so as to protrude.

[0006]

SUMMARY OF THE INVENTION As described above, the sole 1
In the shoes 100 and 100 ′ made of synthetic resin No. 03 with synthetic resin, the center of the bottom surface of the upper 101, which is in contact with the front upper surface of the injection-formed shoe sole 103, is surrounded by the hanging part 101 a. It is formed so as to be recessed by the thickness of the insertion portion 101a. Accordingly, the sole 103 formed in contact with the bottom surface of the upper 101 has a particularly thick central portion corresponding to the recess, which results in an increase in weight and a decrease in flexibility. .

Therefore, conventionally, a filling member having substantially the same thickness as that of the hanging portion 101a is attached to the center of the bottom of the upper 101 to correct the bottom of the upper 101 to a substantially flat shape. By injection molding the sole 103, the sole 1
03 was prevented from becoming unnecessarily thick (not shown). As a matter of course, as described above, the addition of the repairing step using the filling member causes an increase in manufacturing labor and an increase in cost. Further, if the bottom surface of the upper 101 is flattened to make the shoe sole 103 uniform in thickness as described above, the resilience of the stepped portion is insufficient. Therefore, it is necessary to provide a streak portion that functions in the same manner as the shank. However, in order to additionally form the streak portion 107 on the lower surface of the shoe sole 103 as described above, it is necessary to perform a new process on a molding die used for molding the shoe sole 103. New cost increase.

[0008] An object of the present invention is to provide a shoe having the above-described structure which can reasonably realize the flattening of the bottom surface of the upper and the formation of a shank.

[0009]

In order to achieve the above-mentioned object, the present invention provides an insole formed at a bottom opening of a substantially shoe-shaped upper and an outer periphery of the bottom of the midsole. In a shoe in which a shoe sole-side peripheral portion of the upper is suspended and a synthetic resin shoe sole is injection-molded on the lower surface of the upper, a portion of the upper in which the upper is suspended substantially along the outer peripheral portion of the bottom of the midsole. A fastening recess corresponding to the thickness is press-molded with a predetermined width, a hanging portion of the upper is hung and fastened to the fastening recess, and a shank-forming recess is formed in a whip portion on the bottom surface of the middle bottom. Breath molding,
A shoe sole made of a synthetic resin is injection-molded on the bottom surface of the upper, and the shoe sole and a shank formed in the shank forming recess are integrally formed.

According to the above-described means, the following operations are provided. The bottom side peripheral edge of the upper formed in a substantially shoe shape is fixed in a state of being suspended along the outer periphery of the bottom of the insole fixed to the bottom opening of the upper. Along the outer periphery of the bottom of the midsole, a fastening recess corresponding to the thickness of the upper suspension portion is press-formed with a predetermined width. As described above, the bottom peripheral edge of the upper, that is, the suspended portion is suspended and fastened to the fastening recess. The thickness of the upper part suspended from the fastening recess is offset by the depth of the fastening recess and is substantially flush with the bottom surface of the insole. Further, a shank forming concave portion is press-molded in a whip portion on the bottom surface of the middle bottom.

Therefore, when the shoe sole made of the constituent resin is injection-molded on the bottom surface of the upper, the resin flows into the shank forming concave portion of the stepping portion and the shank is integrally formed together with the shaping of the shoe sole outer shape. On the other hand, since the bottom surface of the upper of the shoe sole other than the skirt portion is flush, a uniform thickness can be obtained. In addition, the synthetic resin shoe sole and the shank that are injection-molded as described above are entirely fixed to the upper surface of the upper.

[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, an upper 1 made of leather is formed, an insole 2 is fixed to an opening of a bottom surface of the upper 1, and a sealing sheet 4 is attached to a lower surface of the insole 2. A shoe sole 3 made of synthetic resin is injection-molded on the bottom surfaces of the leather 1 and the midsole 2. In addition, the insole 2
A recess 5 for shank molding is formed in the foot of the bottom of the vehicle, a lightweight material 7 is attached to the front of the bottom of the midsole 2 and the shoe sole 3 is injection-molded on the bottom surface of the upper 1 at the same time. A shank 6 integral with the shoe sole 3 is formed inside the recess 5, and a thin portion is formed at the front of the shoe sole 3 with the light material 7 interposed therebetween.

The upper 1 is formed by cutting a leather material such as a cow or a kangaroo according to the shape of each part of the shoe, and sewing the skin of each part together with a lining or the like to form an upper 1 with an open sole part. Constitute. Upper 1 sewn as described above
Is shaped in such a manner that the peripheral portion on the shoe sole side is folded inward to form a substantially shoe shape. As described above, the upper edge of the upper 1 folded into the bottom side forms the hanging portion 1a. An insole 2 is fitted into the bottom opening of the upper 1, and the above-described hanging portion 1 is fitted along the peripheral edge of the bottom of the insole 2.
a is suspended and bonded.

The above-mentioned hanging operation will be described in detail with reference to FIGS. 4 and 10. At the time of manufacturing, the upper 1 having the above-mentioned habit is constructed as shown in FIG. 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 formed by cutting hard paper or synthetic leather having a thickness of about 3 mm into a shoe sole shape, and forming a fastening recess 2a having a predetermined width along the outer periphery of the bottom surface. is there. The fastening concave portion 2a is a concave portion formed one step lower than the bottom surface of the inner sole 2, and in this embodiment, the inner sole 2 cut into a shoe sole mold is placed on a flat surface with the bottom surface facing upward. The outer peripheral portion of the bottom surface of the bottom 2 is formed by pressing and compressing from the bottom surface side with a mold formed according to the shape of the fastening recess 2a.

In the case of the midsole 2, the thickness of the portion corresponding to the fastening recess 2a is compressed to approximately 1/2 by press working,
The depth of the fastening recess 2a formed thereby is configured to be substantially the same as the leather thickness of the hanging portion 1a of the upper 1. Then, the hanging portion 1 is inserted into the fastening recess 2a.
The surface of the hanging portion 1a and the bottom surface of the insole 2 are configured to be substantially flush when a is applied to and adhered to the fastening recess 2a.

As shown in FIG. 6, the hanging portion 1a of the upper 1 fitted to the last c is coated with an adhesive and adhered while hanging into the fastening recess 2a on the outer periphery of the insole 2. Then, it is fixed using nails or the like (not shown). The width of the fastening concave portion 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 at substantially the same depth as the leather thickness of the upper 1 hanging portion 1a, and when the hanging portion 1a is applied to the fastening recess 2a and fastened as described above, The surface of the hanging portion 1a and the bottom surface of the midsole 2 are configured to be substantially flush. That is, the upper 1
At the outer peripheral portion of the bottom surface portion, the step of the hanging portion 1a is eliminated, and flattening is achieved.

The insole 2 is provided with a shank forming recess 5 having a depth of about half the wall thickness formed by press forming at the foot of the bottom surface. The shank forming recess 5 is the sole 3
Is a recess for forming the shank 6 so as to bite into the bottom surface of the midsole 2 at the same time as the injection molding, and is formed in a belt shape along the stub at the lower surface of the midsole 2 (FIG. 4). still,
It is efficient to press-mold the shank forming recess 5 and the fastening recess 2a at the same time when the outer shape of the insole 2 is punched.

A lightweight member 7 is bonded between the toe and the toe on the bottom surface of the insole 2. The lightweight material 7 is formed by cutting synthetic leather or the like one size smaller than the outer shape of the bottom of the upper 1 and is adhered to the front center of the midsole 2 (FIG. 4). The light-weight material 7 may be made of a material other than synthetic leather, as long as it is relatively lightweight and flexible, and can withstand heat and pressure during injection molding. Etc. may be used.

Incidentally, the lightweight material 7 is set to be thicker than the thickness of the hanging portion 1a of the upper 1. Therefore,
As described above, in a state in which the upper 1 hanging portion 1a is suspended and fixed to the outer peripheral portion of the bottom surface of the midsole 2, a predetermined amount, for example, about 1 to 2 mm, protrudes from the hanging portion 1a on the lower surface of the upper 1. It is made to do.

That is, the lightweight member 7 is for raising the bottom partly by protruding from the bottom surface of the upper 1 which is substantially flush with the upper surface. When the shoe sole 3 is injection-molded on the bottom surface of the leather 1, the shoe sole 3
The thickness at the center of the front part is partially reduced. The thickness of the lightweight material 7 is set in accordance with the above-mentioned raised amount, and is, for example, about 1 to 2 mm thick.

The hanging 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, the sealing sheet 4 is adhered to the bottom of the insole 2 exposed to the upper part 1a.

The filling sheet 4 is made of a synthetic fiber cloth and 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 midsole 2 and the hanging portion 1a of the upper 1 (FIGS. 7 and 8).
By attaching the filling sheet 4, the fixing recess 2a
To cover the edge of the suspended portion 1a, which is fixed to the space, and seal the gap generated in the portion. Also, the shank forming recess 5
The sealing sheet 4 according to the first embodiment, the inner surface of the concave portion 5 and the light
After the sheet 4 is adhered, the convex shapes of the concave portion 5 and the lightweight material 7 remain substantially intact.

A mold d for injection molding is brought into close contact with the bottom surface of the upper 1 to which the filling sheet 4 is adhered, and the molten resin is injection-molded (FIGS. 9 and 10). Thereby, the sole 3 made of synthetic resin is integrally formed with the bottom surface of the upper 1 which 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 forming concave portion 5 on the lower surface of the midsole 2, and in the concave portion 5. The shank 6 is formed. The shank 6 is formed integrally with the shoe sole 3 and is provided in a state of being fitted into the shank forming recess 5 formed along the inner sole 2 of the shoe.

The front part of the shoe sole 3 is used for injection molding.
The corresponding portion at the front of the sole 3 is formed thinner than the other portions by the protrusion of the lightweight material 7. Then, 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 adhesive property of the molten synthetic resin. In addition, by providing the lightweight material 7 on the bottom surface of the upper 1, extra thickness can be removed from the front of the sole 3, so that the flexibility required for the front of the sole 3 can be effectively improved, and at the same time, The shoe sole 3 can be reduced in weight. Further, the convex portion of the shank 6 integrated with the shoe sole 3 is fixedly fitted in the shank forming concave portion of the midsole 2, and the lightweight material 7 protruding from the bottom surface of the upper 1 is formed by the protrusion of the light sole 7. In a state of being fitted to the upper surface of. Accordingly, the injection-molded shoe sole 3 is completely adhered to the upper surface of the upper 1 through the irregularities of the shank 6 and the lightweight material 7 so as to conform to the shape of the upper 1 of the upper. 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 above-mentioned shoe a, except that the hanging portion 1a of the upper 1 and the midsole 2 are provided.
A through hole 8 penetrating the outer peripheral portion is formed, and a pin portion 9 integrally formed and protruded from the peripheral edge of the upper surface of the shoe sole 3 is fitted into the through hole 8. Several pins 9 are provided along the toe and the heel of the sole 3. The above-mentioned pin portion 9
When the shoe sole 3 is subjected to injection molding, the molten synthetic resin flows into the through hole 8 so that the shoe sole 3 is integrally formed with the shoe sole 3 in the same manner as the shank 6. In the shoe a2 configured as described above, the binding force due to the unevenness of the shank 6 and the lightweight material 7 and the binding force due to the pin portion 9 are added, and the fixing force of the shoe sole 3 to the bottom surface of the upper 1 is more effectively reduced. Can be improved.

In the shoes a and a2 of the embodiment described above, the fastening recess 2a provided along the outer peripheral portion of the bottom surface of the inner sole 2.
Is formed in parallel with the bottom of the insole 2 and in a step-like shape, but the fastening recesses are formed by suspending the suspended portion 1a of the upper 1 and fixing the suspended portion 1a substantially in a state where the suspended portion 1a is suspended. Any shape may be used as long as it is a concave shape that can be eliminated. For example, the thickness of the outer peripheral edge of the shoe sole 2 may be changed to a tapered shape, or the cross section of the tapered portion may be changed. It may be configured to be concavely curved.

Further, in the shoes a and a2 of the above-mentioned embodiments, the shank 6 is formed in a single band shape along the skirt portion on the bottom surface of the upper 1, but the shank shape is limited to that described above. However, the width, length, and outer peripheral shape can be freely set by changing the shape of the shank forming concave portion. Further, the number of shank is not limited to one, and two or more shank may be provided along the foot of the insole 2. Similarly, the lightweight material protruding from the front 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 area of the rear part of the shoe sole including the stomach part, and the lightweight material 7 is provided in the area of the front part of the shoe sole including the swelling part. Optional.

According to the gist of the present invention, the above-described 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. Furthermore, although the shoes of the above embodiments are soccer shoes, the present invention may be any type of shoes as long as the soles are injection-molded with a synthetic resin.

[0032]

As described above, the shoe of the present invention is formed by press-forming a fastening recess along the outer peripheral portion of the bottom of the insole, and hanging the shoe sole-side peripheral portion of the upper into the recess. Therefore, in the state in which the suspension of the suspended portion has been completed, the step of the suspended portion can be eliminated and the upper surface of the upper can be flattened. At the same time, a shank forming recess is press-formed in the skirt portion of the bottom surface of the middle bottom. Therefore, when the shoe sole made of synthetic resin is injection-molded on the bottom surface of the upper, the thickness of the shoe sole is made substantially constant by flattening the shoe sole, and at the same time the shoe sole is formed in the molding recess. An integral shank can be formed. Further, according to the shoe of the present invention, it is not necessary to fix the step of the suspended portion by attaching the padding member to the upper surface of the upper as in the related art, and the shank is formed in a mold for forming the shoe sole. Since there is no need to perform a new process for molding, the labor and cost during manufacturing can be greatly 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 a last and an upper.

FIG. 6 is a perspective view showing a state in which a suspended portion of the upper is suspended around a midsole;

FIG. 7 is a perspective view showing a state in which a sealing sheet is adhered to the bottom surface of the upper.

FIG. 8 is a perspective view showing the upper with the filling sheet adhered thereto.

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

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a longitudinal sectional view showing a shoe in which a pin portion is fixed to an upper suspension portion and an outer periphery of an insole.

FIG. 12 is a longitudinal sectional view showing a conventional shoe provided with a shank.

FIG. 13 is a longitudinal sectional view showing a conventional shoe provided with a streak portion on a shoe sole.

[Explanation of symbols]

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

Claims (1)

(57) [Claims] An insole is fixed to an opening of a bottom surface of a substantially shoe-shaped upper, and a peripheral portion of the upper of the upper is hung around the outer periphery of the bottom of the inner sole, and the bottom surface of the upper is formed. In a shoe made by injection-molding a synthetic resin shoe sole, a fastening recess having a predetermined width is formed along the outer periphery of the insole at a predetermined width substantially corresponding to the thickness of the portion where the upper is suspended. The hanging part of the upper is suspended and fastened to the fixing recess, and a shank forming recess is press-formed on the forefoot part on the bottom surface of the insole, and the synthetic resin shoe sole is formed on the bottom surface of the upper. A shoe formed by injection-molding the shoe sole and a shank formed in the shank forming recess.