JPH09150467A - Shoes and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently ensure the fixing force of a shoe sole to an upper bottom surface, especially, a toe part. SOLUTION: A patch material is bonded to the upper surface of an insole 2 and the bonding part of the patch material 5 of the insole 2 is pressed and compressed and the hole cut-off line provided to the patch material 5 is cut off to form a fixing part forming hole 6. The insole 2 is fixed to the bottom surface of a last and upper 1 is attached to the last and the peripheral edge part 1a on the shoe sole side of the upper 1 is pulled over to the insole 2 and a through-hole 8 is bored in the bottom surface of the upper 1 to be allowed to communicate with the fixing part forming hole 6 and a mold is mounted on the bottom part of the upper 1 and a synthetic resin is injected to integrally mold a fixing part 9 and a shoe sole 3 through a pin like part 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 a shoe formed by injection-molding a synthetic resin shoe sole on the bottom surface of an upper and a method of manufacturing the shoe.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
01 is provided with a shoe sole 103 made of synthetic resin.
These shoes 100, after sewing the leather upper 100,
The upper 101 is shaped into a predetermined shoe shape by a habit forming process, and is attached to a last c for molding as shown in FIG. At the same time, the insole is fixed to the bottom of the last c, and the outer periphery of the shoe sole of the upper 101 is suspended and bonded to the outer periphery of the bottom of the inner sole 102.

[0003] Thereafter, a sealing sheet 104 is attached to the bottom surface of the upper, and the surface of the hanging portion 101a which is suspended and adhered to the outer peripheral portion of the bottom of the midsole 102 is buffed. Rough and flatten the surface and move on to the next shoe sole forming process. The upper 101 to which the insole 102 is attached as described above is mounted on the last c in a state where the former is attached to the shoe bottom in a hermetically sealed state, and is melted in the former. The synthetic resin is injected, and molded with a synthetic resin shoe sole adhered to the bottom surface of the upper 101 by the adhesive force of the molten synthetic resin (not shown). That is, the buffing step described above is performed to improve the adhesiveness between the hanging portion 101a of the upper 101 and the shoe sole 103 made of synthetic resin.

[0004]

The above-mentioned buffing operation is performed along the area immediately inside where the shoe sole 103 made of synthetic resin is formed. Buffing may be performed up to. In a shoe that has been buffed by protruding in this manner, the buffing of the upper 101 may cause the uneven thickness of the upper 101 to be partially thinned, and that portion may be weakened in strength. is there. In addition, since small scratches due to buffing remain after completion, the commercial value is reduced.

[0005] Further, in a shoe, such as a soccer shoe, in which a very strong force is locally applied to the sole during use, the toe portion of the sole is formed by the hanging portion 101a of the upper 101. Was sometimes peeled off.
Under such circumstances, the buffing process is reduced or the hanging portion 101a of the upper 101 and the shoe sole 103 made of synthetic resin are used.
There has been a demand for the development of shoes that can secure a sufficient bonding strength between them.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shoe having the above-mentioned structure, which can prevent partial peeling of a toe portion, and can sufficiently secure a fixing force of the shoe sole to the bottom surface of the upper. It is to provide a method.

[0007]

In order to achieve the above-mentioned object, a method of manufacturing a shoe according to the present invention comprises the steps of: The adhesive material cut in accordance with the shape of the adhesive material is adhered, and the adhesive material attached portion of the middle bottom is pressed to compress the thickness of the same portion to approximately the same thickness as the other portions, and the outer periphery of the above adhesive material Cut out the hole cut line provided along the vicinity of the part to form a fixed part forming hole of a predetermined shape in the same abutment, fixed the above insole on the bottom surface of the last, and then sewn and shaped it into a roughly shoe-shaped upper A leather is attached to the last, a shoe sole-side peripheral portion of the upper is hung on the outer peripheral portion of the bottom surface of the midsole, and is fixed. It is connected to the fixing hole of the material, and the mold for molding the shoe sole is applied to the bottom of the upper, and attached in a sealed manner It is for injecting a synthetic resin was melted inside the forming die.

Further, in the shoe of the present invention, the insole is fixed to the bottom opening of the upper formed substantially in the shape of a shoe, and along the outer periphery of the bottom of the midsole, the periphery of the upper of the upper is closed. Hang it and fix it,
In a shoe made by injection-molding a synthetic resin shoe sole on the bottom surface of the upper, a patch is adhered to a predetermined location on the outer periphery of the upper surface of the insole, and the shoe is compressed. The attachment portion is formed to have substantially the same thickness as the other portions, and a fixing hole having a predetermined shape is formed in the outer peripheral portion of the backing material, and a through hole is formed in the outer peripheral portion of the upper surface of the upper to form the fixing hole. Let them communicate,
The fixing portion made of synthetic resin fitted in the fixing hole and the shoe sole injection-molded on the bottom surface of the upper are integrally formed through the through hole.

According to the above-described means, the following operations are provided. At a predetermined position on the outer peripheral portion of the upper surface of the midsole, a patch cut in accordance with the shape of the portion is adhered, and this portion is pressed. As a result, the thickness of the intermediate material attaching portion is compressed to substantially the same thickness as the other portions. That is, the backing material adhering portion of the midsole is compressed and hardened, and is in a partially strengthened state.

[0010] A hole cutout line is formed in the backing material, and after the compression processing, the hole cutout line is cut out, so that the upper surface of the insole has a fixed shape and the same depth as the thickness of the backing material. A part forming hole can be formed. The midsole is placed on the bottom of the last. A substantially shoe-shaped upper is attached to the last, and the outer periphery of the bottom side of the upper is hung along the outer periphery of the bottom of the midsole fixed to the bottom of the last and fixed. As a result, the opening on the bottom surface of the upper is closed by the middle sole. A through hole is formed in the outer peripheral portion on the bottom surface of the upper, and this through hole communicates with the fixing portion forming hole of the backing material.

A mold for forming a shoe sole is hermetically mounted on the bottom of the upper, and a molten synthetic resin is injected into the mold. Thereby, the shoe sole made of synthetic resin is formed inside the mold, and at the same time, the shoe sole is adhered to the bottom surface of the upper by the adhesive force of the molten synthetic resin. Simultaneously with the injection of the molten resin, the molten resin is pressed into the fixed portion forming hole through the through hole formed in the bottom surface of the upper. That is, the predetermined shape portion formed in the attachment portion forming hole on the upper side of the insole and the shoe sole are integrally connected via the member that fills the through hole.

According to the shoe of the present invention, the insole is fixed to the bottom opening of the upper, and the shoe sole side peripheral edge of the upper is hung along the outer periphery of the bottom of the inner sole to fasten. As a result, the bottom opening of the upper is closed by the midsole. In addition, a synthetic resin shoe sole is injection-molded on the bottom surface of the above-mentioned upper and adhered to the lower surface of the upper.

A padding material is attached to the outer peripheral surface of the upper surface of the insole and compressed so that the thickness of the same portion is substantially the same as that of the other portion. Thereby, the above-mentioned portion of the midsole is compressed in a state where the patch is adhered, and as a result, it is in a hardened state. A fixing hole having a predetermined shape is formed in an outer peripheral portion of the backing material. In addition, a through hole is formed in the outer peripheral portion of the bottom surface of the upper to communicate with the fixing hole. A fixing portion is fitted in the fixing hole and the through hole by a synthetic resin, and the fixing portion and the shoe sole injection-molded on the bottom surface of the upper are integrally formed through the through hole portion. . Therefore, the above-mentioned fixing portion is in a state of being cut into the upper surface side of the insole through the member filling the through-hole portion, and the shoe sole is in a state where the above-described fixing force of the fixing portion is added to the adhesive force of the synthetic resin. To the bottom of the upper.

[0014]

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 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 inner bottom 2. A shoe sole 3 made of synthetic resin is injection-molded on the bottom surfaces of the inner sole 1 and the inner sole 2.

Further, the insole 2 is formed by attaching and pressing the contact members 5 and 10 to the toe portion on the upper surface and the heel portion on the lower surface, and also has a through hole 8 formed in the outer peripheral portion of the toe portion and a fixing hole. Hole 6
A pin-like portion 7 and a fixing portion 9 integrally projecting from the outer peripheral portion of the shoe sole 3 are fixed to the inside.

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 leather of each part together with a lining or the like to form an upper 1 with an open sole part. Configure. The sewn upper 1 is knitted with the periphery of the shoe sole side folded inward at a constant width,
Shape into a roughly shoe shape. As described above, the upper skin 1 shoe bottom side peripheral portion folded to the bottom surface side is configured as the hanging portion 1a. The midsole 2 is fitted into the bottom opening of the upper 1
The above-mentioned hanging portion 1a is hung along the outer peripheral portion of the bottom surface of the midsole 2 and adhered. As a result, the bottom opening of the upper 1 is closed by the midsole 2.

A sealing sheet 4 made of synthetic fiber is adhered to the bottom surface of the upper 1 to close and seal an adhesive gap formed between the peripheral portion of the hanging portion 1a and the bottom surface of the midsole 2.

The insole 2 is formed by cutting a hard paper or the like having a thickness of about 2 to 3 mm into a shoe sole shape in plan view. An upper toe portion of the inner bottom 2,
And a backing material 5 made of the same hard paper as the insole 2 on the lower heel portion.
And 10 are fastened. The contact materials 5 and 10 are cut in accordance with the outer shapes of the toe portion and the heel portion of the midsole 2 and are adhered to the upper toe portion and the lower heel portion of the midsole 2 by applying an adhesive. The insole 2 is compressed by pressing the toe portion and the heel portion, thereby compressing the overlapping insole 2 and the hard paper material of the backing materials 5 and 10, and reducing the thickness of the same portion to approximately the same thickness as the other portions. Compressed. As a result, the toe portion and the heel portion of the midsole 2 to which a relatively large load is applied become firm and dense, resulting in a partially reinforced state.

A shoe sole 3 made of a synthetic resin such as urethane resin is injection-molded on the bottom surface of the upper 1 to which the insole 2 constructed as described above is attached. The shoe sole 3 has studs protrudingly formed at the front half and the heel part of the bottom surface, and is integrally adhered to the sole surface of the upper 1 by the adhesive force of the molten synthetic resin at the time of injection molding.

An arc-shaped fixing hole 6 is formed along the outer periphery of the toe portion on the upper surface side of the insole 2 toe portion. Also,
A through hole 8 with a diameter of about 3 mm along the outer periphery of the bottom of the upper 1
Are drilled at regular intervals. These through holes 8
It penetrates the hanging portion 1 a and the toe of the inner bottom 2 and communicates with the fixing hole 6. Each through hole 8 and the fixing hole 6 are filled with a synthetic resin forming the shoe sole 3, and a pin-like portion 7 and a fixing portion 9 having an arc shape in a plan view are integrally formed inside these 8, 8. is there.

That is, the fixing portion 9 formed so as to bite into the fixing hole 6 formed on the upper surface side of the insole 2 and the toe portion of the shoe sole 3 are formed by three pins penetrating the bottom surface of the upper 1. The shoe sole 3 is connected to the toe portion via the portion 7. Thereby, the fixing force of the toe portion where the shoe sole 3 tends to peel off can be greatly improved.

Next, a method for manufacturing each of the above shoes will be described with reference to FIGS. As shown in FIG. 4, the insole 2 is formed by cutting hard paper or synthetic leather having a thickness of about 2 to 3 mm into a substantially flat shoe sole shape. A patch 5 cut from hard paper similar to that of the midsole 2 is attached to the upper toe of the midsole 2. The patch 5 is cut in accordance with the outer shape of the toe portion of the midsole 2 and has a cutout line 6 'along the outer peripheral portion corresponding to the toe portion.

The cut line 6 ′ is formed by connecting the patch 5 to the middle bottom 2.
This is for forming the fixing portion forming hole 6 having a substantially arc shape in plan view as shown in FIG. The cut is made leaving a dotted joint. The adhesive 5 is adhered to the toe portion on the upper surface of the insole 2 after applying the adhesive. In addition, the insole 2 has a backing 10 similar to the backing 5 attached to the lower heel. However, the heel-side backing material 10 is not provided with a cut line like the toe-side backing material 5. In addition, the insole 2 where the above-mentioned backing materials 5 and 10 were stuck
Is a state in which the toe portion and the heel portion are thicker by the thickness of the backing material 5.

As described above, the toe portion and the heel portion of the insole 2 to which the backing members 5 and 10 are adhered are pressed by a press machine, and the overlapping inner bottom 2 and backing materials 5 and 10 are compressed. As a result, the thickness of the portion of the insole 2 where the backing materials 5 and 10 are attached is compressed to approximately the same thickness as the other portions of the insole 2 (FIG. 5). Further, according to the above-described press working, the toe portion and the heel portion of the midsole 2 are hardened by compression to be in a high-density state, and in particular, the strength of the toe and heel to which a load is applied is partially increased.

After the press of the toe portion and the heel portion as described above, the insole 2 is cut off at a cut line 6 'of the patch 5 as shown in FIG. The fixing portion forming hole 6 is formed. The depth of the formed fixing portion forming hole 6 corresponds to the thickness of the compressed backing material 5 and corresponds to approximately 略 of the thickness of the midsole 2. The fixing portion forming hole 6 becomes the fixing hole 6 in the shoe a described above. The form of the above-mentioned cut line 6 ′ is not limited to one having a dotted connecting portion as shown in FIG. A cut line structure in which a cut is made over the entire length and a single thin leather joint is left at the bottom of the cut may be used. Further, it is preferable that the above-described cutout line is formed at the same time when the outer shape of the patch 5 is punched out by a press.

On the other hand, the upper 1 is formed by sewing a skin material cut in accordance with the shape of each part of the shoe together with a cushioning material and a lining. Since the upper after sewing does not yet have the shape of a shoe,
By heating and pressing while the peripheral portion on the shoe sole side is folded inward by a forming tool for forming a habit, the outer shape of the target shoe is formed.

The upper 1 shaped as described above is mounted on the last c formed in the shape of a foot as shown in FIG. 6 from above. The last c is supported upside down, and the middle bottom 2 is fixed to the bottom surface of the bottom c with the upper surface side facing down.

As shown in FIG. 7, the upper 1 attached to the last c on which the insole 2 is fixed has the hanging portion 1a formed on the periphery of the shoe sole on the bottom of the last c. It is hung on the outer peripheral portion of the bottom 2 and an adhesive is applied and bonded. Further, the hanging portion 1a corresponding to the heel part having a strong habit is fixed using a nail (not shown) together with the adhesive.

Next, as shown in FIG. 8, a synthetic fiber sealing sheet 4 is adhered to the bottom surface of the midsole 2 where the hanging portion 1a is hung, and the outer peripheral edge of the hanging portion 1a and the midsole. 2
The adhesive gap generated between the bottom surface is closed.

Next, as shown in FIG. 9, a through hole 8 is formed in the toe portion on the bottom surface of the upper 1. Through hole 8 is upper 1
A fixing portion forming hole 6 formed on the upper surface side of the midsole 2 through the bottom surface
It is a hole communicating with. The through holes 8 are formed by using a tool such as a punch at an appropriate number, for example, three, at regular intervals right above the fixing portion forming hole portion in the toe portion on the bottom surface of the upper 1. Incidentally, the inner diameter of the through hole 8 is set to about 3 mm. The width of the fixing portion forming hole 6 with which the through hole 8 communicates is set to be somewhat larger than the inner diameter of the through hole 8.

Next, the bottom surface of the upper 1 attached to the last c is set with respect to a mold b for forming a shoe sole (FIG. 10).

The mold b is for injection-molding a shoe sole 3 made of urethane resin on the bottom of the upper 1 and the inner sole 2 described above. The molding die b is composed of a bottom mold b1 that forms the bottom surface of the sole 3 from which the studs protrude, and a side mold b2 that forms the outer peripheral surface between the periphery of the sole and the outer periphery of the upper. The side mold b2 is divided right and left from the center, and is divided right and left while being in close contact with the upper surface of the bottom mold b1.

The upper 1 attached to the last c is fixed just above the bottom mold b1 with a gap corresponding to the thickness of the shoe sole 3. At the same time, both side molds b2 are moved from the left and right to match the mold on the upper surface of the bottom mold b1. Thereby, a space for forming the shoe sole 3 is formed between the bottom surface of the upper 1 and the bottom mold b1.

Next, the molten resin is injected into the molding die b, and the molding resin in the molding space is filled with the molten resin. The molten resin injected into the molding space adheres to the insole suspension portion 1a and the bottom surface of the inner bottom 2 where the filling sheet 4 is adhered. Note that an adhesive may be applied to the bottom surface of the inner bottom 2 as a pre-adhesion before the actual adhesion.

At the same time, the molten resin injected into the mold passes through each through hole 8 on the bottom surface of the upper 1 and flows into the fixing portion forming hole 6, where a substantially circular arc in plan view. Forming a fixing portion 9 is formed. That is, the fixing portion 9 and the toe portion of the shoe sole 3 are integrally connected by the three pin-shaped portions 7 formed in the through holes 8.

After a predetermined time, both side molds b2 are divided into right and left sides, and the sole 3 is removed from the bottom mold b1.
In the shoe manufactured in the above-described process, the fixing portion 9 and the toe portion of the shoe sole 3 formed in a state where the shoe sole 3 is adhered to the bottom surface of the upper 1 and fitted on the upper surface side of the midsole 2 are formed. Since they are integrally connected via the respective pin-shaped portions 7, the fixing force of the toe portion of the shoe sole 3 to the bottom surface of the upper 1 is significantly increased.

In the above embodiment, three pin-shaped portions 7 are formed with three through-holes 8 formed in the bottom surface of the upper 1, but the number of the through-holes and the number of the pin-shaped portions are arbitrary. It may be set and one or more may be provided. Further, the through hole and the fixing portion forming hole for forming the pin-like portion and the fixing portion may be provided at a position other than the toe portion on the bottom surface of the upper 1. It may be provided on both sides of the section.

Further, the shape of the fixing portion forming hole formed on the upper surface side of the insole 2 and the fixing portion formed inside the fixing portion forming hole are not limited to the arc shape as described above. The fixing part is
Any shape may be used as long as a fixing portion larger than the diameter of the pin-shaped portion is formed at the upper end of the pin-shaped portion. The fixing portion may be provided independently at the upper end of each pin-shaped portion. For example, a circular fixing portion may be formed at the upper end of each pin-shaped portion, and the shape of the fixing portion and the pin-shaped portion may be substantially rivet-shaped. It may be. In this case, the same number of fixing portion forming holes as the number of fixing portions are provided individually and independently.

The shoes of the embodiment are soccer shoes, but the present invention may be any type of shoes as long as the soles are injection-molded with a synthetic resin. 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.

[0040]

According to the manufacturing method of the present invention, the synthetic resin injected into the molding die for forming the sole of the shoe is pressed into the fixing portion forming hole through the through hole and fixed in a predetermined shape. Since the part is formed in a state of being fitted to the upper surface of the insole, the shoe sole formed on the bottom surface of the upper and the above-mentioned fixing part are formed in the through hole in a toe part or the like where it is desired to particularly secure the fixing strength of the shoe sole. It can be integrally connected via a pin-like portion to be inserted, and the upper surface of the upper and the shoe sole can be extremely firmly fixed. Further, the portion of the inner bottom to which the patch has been adhered can be stiffened to a high density by pressing. As a result, the supporting strength of the portion receiving the fixing portion is increased, and the fixing force by the fixing portion can be effectively increased.

In the shoe of the present invention, the fixing portion filled and formed in the fixing portion forming hole formed in the upper surface of the insole and the shoe sole formed on the bottom surface of the upper are integrally formed through the through hole. Therefore, the fixing structure in which the fixing portion that fits into the fixing hole on the upper surface side of the insole and the shoe sole are connected via the through hole can greatly increase the fixing force of the shoe sole to the bottom surface of the upper. . In addition, since the intermediate material attaching portion is firmly and densely pressed by the press and strengthened, the supporting strength of the portion receiving the fixing portion is increased, and thus the fixing force by the fixing portion is further increased. It can be effectively increased and the durability of the shoe can be improved.

[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 a patch and an insole.

FIG. 5 is a perspective view showing an insole where a toe and a heel to which a patch is adhered are pressed.

FIG. 6 is a perspective view showing a last and an upper.

FIG. 7 is a perspective view showing a state in which a suspended portion of the upper is suspended around a midsole;

FIG. 8 is a perspective view showing a state in which a sealing sheet is stuck to the bottom surface of the upper.

FIG. 9 is a perspective view showing the upper with a through-hole.

FIG. 10 is a longitudinal sectional view showing a state in which a mold is mounted on the bottom surface of the upper.

11 is a sectional view taken along line XI-XI in FIG.

FIG. 12 is a perspective view showing a state in which the bottom surface of the upper has been buffed in a conventional shoe manufacturing method.

FIG. 13 is a longitudinal sectional view showing a conventional shoe.

[Explanation of symbols]

 a ... shoe 1 ... upper 1a ... hanging part 2 ... insole 3 ... shoe sole 5 ... padding material 6 ... fixing part forming hole (fixing hole) 7. ..Pin-shaped parts 8 ... through holes 9 ... fixed parts

Claims (2)

[Claims] 1. An adhesive material cut in accordance with the shape of the outer peripheral portion of the insole is adhered to a predetermined portion of an outer peripheral portion of the upper surface of the insole which is cut into a flat shoe sole mold. Pressing the part, compressing the thickness of the part to approximately the same thickness as the other parts, cutting out the perforated line provided along the vicinity of the outer periphery of the backing material, and fixing the predetermined shape to the backing material After forming the formation hole and placing the midsole on the bottom surface of the last, the upper sewn and shaped into a substantially shoe shape is attached to the last, and the shoe sole side peripheral portion of the upper is the midsole. It is hung on the outer periphery of the bottom surface and fixed, and a through hole is formed in the outer periphery of the upper surface of the upper to communicate with the fixing portion forming hole of the backing material. A shoe manufacturing method characterized in that a mold is applied and hermetically mounted, and a molten synthetic resin is injected into the mold. Construction method. 2. An insole is fixed at an opening of a bottom surface of an upper formed in a substantially shoe shape, and a peripheral edge of the upper of the upper is suspended and fixed along an outer peripheral portion of the bottom of the inner sole. In a shoe made by injection molding a sole made of synthetic resin on the bottom surface of the upper, a patch is applied to a predetermined location on the outer peripheral portion of the upper surface of the midsole and compressed to thereby compress the midsole. The sticking portion is formed to have substantially the same thickness as the other portions, a fixing hole having a predetermined shape is formed in the outer peripheral portion of the patch, and a through hole is formed in the outer peripheral portion of the bottom surface of the upper to form the fixing hole. And a synthetic resin fixing portion fitted in the fixing hole and a shoe sole injection-molded on the upper surface of the upper are integrally formed through the through hole.