JP2000023701A - Sports shoes and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To upgrade shape retainability of upper toe parts for sport shoes while improving the strength of bonding between uppers and outsoles at the toe parts. SOLUTION: A molding clearance 15 is formed between an upper 1 and a reinforcing leather 11 at a toe part of each shoes body (a). A through hole 16 communicating with the molding clearance 15 is bored in a bottom surface of the shoes body (a) while an outsole 3 made of a synthetic resin is injection molded on the bottom surface of the shoes body (a) and a synthetic resin is injected into the molding clearance 15 through the through hole 16 to mold a toe cap 10 within the molding clearance 15. The toe cap 10 which gets the reinforcing leather 11 entirely bonded on the upper 1 of the toe part to be integrated with the outsole 3 at the toe part reinforces the toe part of the shoes body (a).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an athletic shoe formed by injection-molding a synthetic resin shoe sole along a bottom surface of an upper constituting a shoe body, and more particularly, to the strength and protection of a toe portion. TECHNICAL FIELD The present invention relates to athletic shoes having high shape and a method for manufacturing the same.

[0002]

2. Description of the Related Art Hitherto, in athletic shoes used for sports with abrupt movements, for example, soccer shoes, it is frequently repeated that a ball is kicked violently or a ground is accidentally kicked up during play. Each time, a load is applied that causes the toes of the upper to be severely deformed and the toes to separate from the soles. Therefore, in the conventional soccer seeds, it is necessary to increase the bonding strength between the toe portion of the upper and the sole of the shoe as much as possible. Further, in order to ensure good ball control and kicking force against the ball, it is desired that the toe portion of the upper has good shape retention.

[0003]

However, in a conventional soccer shoe, a synthetic resin shoe sole is injection-molded on the bottom surface of a sports shoe body made of a leather upper.
The shoe sole made of synthetic resin is bonded to the bottom surface of the athletic shoe body, so it is difficult to secure a sufficient adhesive strength between the toe of the upper and the shoe sole. In use, the toe of the upper sometimes peeled off from the sole of the shoe.

[0004] In addition, most of the toe portions of the upper of the above-mentioned conventional soccer shoes have a structure in which a cushioning material such as a sponge is interposed between a leather upper and an interior cloth and sewn. It was difficult to maintain the shape of the toe, and the moment the ball was kicked, the toe of the upper deformed significantly, which had an adverse effect on ball control during play.

An object of the present invention is to provide an athletic shoe as described above, which improves the adhesive strength between the upper of the toe of the athletic shoe and the sole of the shoe by injection molding, and maintains the shape of the toe of the upper. And to provide a rational manufacturing method of the athletic shoe.

[0006]

In order to solve the above-mentioned problems, a sports shoe of the present invention is formed by injection-molding a synthetic resin shoe sole along a bottom surface of an upper constituting a shoe body. An athletic shoe, wherein a forming gap is formed between an upper at a toe portion of the shoe body and a reinforcing skin provided inside or outside the upper, and a bottom surface of a toe portion of the shoe body. A through hole communicating with the molding gap is formed in the outer skin material on both the suspended upper skin and the reinforcing skin, and a synthetic resin shoe is formed on the bottom surface of the shoe body. The bottom is injection-molded, a synthetic resin is injected into the molding gap through the through hole, and a toe cap is molded in the molding gap.

[0007] According to the above means, a shoe sole made of synthetic resin is injection-molded along the bottom surface of the upper constituting the shoe body. A molding gap of a predetermined shape is formed between the upper skin and the reinforcing skin at the toe portion of the shoe body. Further, the above-mentioned upper and reinforcing skin are suspended from the bottom surface of the toe portion of the shoe main body. There is a through hole that communicates with. The through-hole allows communication between the molding gap and the bottom surface of the shoe body.

Accordingly, when a sole made of synthetic resin is injection-molded on the bottom surface of the shoe body, the sole is formed on the bottom surface of the shoe body, and the injected resin passes through the through hole of the toe portion. The toe cap is injected into a molding gap formed between the upper skin of the toe and the reinforcing skin, and the molding gap is filled with a synthetic resin in a thin plate shape to form a toe cap along the curved surface shape of the toe. The thus formed toe cap is entirely adhered between the upper skin of the toe portion and the reinforcing skin, and is integrated with the toe portion of the shoe sole via a member filling the through-hole portion. And
The toe cap is configured as a member to be fitted to the toe portion of the shoe body by being integrated with the toe portion of the shoe sole through the member of the through-hole portion. The shape of the curved surface is maintained as it is.

The present invention also provides a method for manufacturing athletic shoes, comprising injection-molding a synthetic resin shoe sole along the bottom surface of the upper constituting the shoe body. A molding gap of a predetermined shape is formed between the upper at the toe of the shoe body and the reinforcing skin provided inside or outside the upper, and the upper suspended on the bottom surface of the toe of the shoe body. In both skins of the skin and the reinforcing skin, a through hole is formed in the skin material located on the outside, and a skin material of the upper and the reinforcing skin is provided between the through hole and the molding gap. After communicating through a communication groove formed in the inner skin material of the two skin materials and mounting a molding die on the bottom surface of the shoe body, a synthetic resin is injected into the molding die to form a shoe. At the same time as forming the shoe sole on the bottom of the main body, injecting synthetic resin into the molding gap through the through hole and the communication groove Hama allowed, is obtained by molding a toe cap at the molding gap.

According to the above-described manufacturing method, when a mold is mounted on the bottom surface of the shoe body and the shoe sole made of synthetic resin is injection-molded, the shoe sole is formed along the bottom surface of the shoe body,
The injection resin is injected and filled into the molding gap formed between the upper skin of the toe and the reinforcing skin, passing through the through hole and the communication groove. Thereby, a thin plate-shaped toe cap is formed in the forming gap. The toe cap is entirely bonded between the upper of the toe and the reinforcing skin, and is integrated with the shoe sole of the toe via a member that fills the through hole. The toe cap is formed as a member to be fitted on the toe of the shoe body, and keeps the shape of the curved surface of the toe of the upper in the shoe body.

When the molding die is mounted on the bottom surface of the shoe body as described above, a portion communicating with the through hole and the molding gap (particularly corresponding to the outer peripheral edge portion of the shoe sole) in the crimped portion with the molding die. Region) is crushed and closed due to a strong crimping force. However, even in the above-described crimped portion, a resin flow path is secured by the communication groove formed in the inner skin material of the upper or the reinforcing skin so as to cross the same portion, and the resin is molded from the through hole. The flow of the injected resin into the gap can be ensured.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The shoe shown in FIGS. 1 to 4 is a soccer shoe embodying the present invention, and forms a shoe body a by closing a bottom opening of a leather upper 1 with a midsole 2. A shoe sole 3 made of synthetic resin is formed by injection molding on the bottom surface, that is, on the bottom surface of the upper 1 and the midsole 2. Further, a toe cap 10 for improving shape retention and strength of the toe portion is provided inside the toe portion of the shoe body a. The toe cap 10 is injection-molded integrally with the sole 3.

The upper 1 constituting the surface of the shoe body a and the reinforcing leather 11 provided in a substantially arc shape along the inside of the toe portion of the upper 1 are made of a leather material such as cow or kangaroo. Cut according to the shape of each part of the shoe, sew the leather of each part,
The shoe sole 3 is formed as an open shoe shape. The upper 1 and the reinforcing leather 11 sewn as described above are knitted in a state where the peripheral portion on the shoe sole 3 side is hung inside, and shaped into a substantially shoe shape, and then the above-mentioned hanging portion 1a The midsole 2 is fitted into the opening formed inside, and the hanging portion 1a is bonded along the outer peripheral portion of the bottom surface of the midsole 2 (FIG. 1).

A bottom portion of the shoe body a configured as described above,
That is, a sealing sheet 4 made of a relatively thin and fine cloth is adhered to the upper 1 and the inner sole 2, and a synthetic resin shoe sole 3 with a spike is integrally formed. . In addition, the above-mentioned filling sheet 4 may be stuck on a part of the insole 2. Also, the same-stop sheet 4 can be omitted.

The upper part a1 of the upper 1 is provided with an opening part a3 in a form in which the wearing mouth a2 is cut and opened toward the toe, and a shoelace insertion part 5 is provided along the periphery of the opening part a3. It is.
The shoelace insertion portion 5 sews a substantially U-shaped band-shaped reinforcing cloth 5b along the peripheral edge of the opening a3,
An insertion hole 5a for inserting the shoelace 7 is formed at regular intervals along the right and left sides of the peripheral portion. That is, the insertion holes 5a are formed in two rows on both the left and right sides with the opening a3 interposed therebetween, and the shoelaces 7 are inserted into these insertion holes 5a in a zigzag manner (FIGS. 1 and 3). A tongue piece 8 is provided inside the opening a3 to open the opening a3.
Is configured to be closed from the inside.

A bottom portion of the shoe body a configured as described above,
That is, a shoe sole 3 made of a synthetic resin such as urethane resin is injection-molded on the bottom of the upper 1 and the midsole 2. Sole 3
Is formed with a substantially constant thickness along the bottom surface of the shoe main body a, and the number of spikes 3a is protruded integrally with the bottom surface in the present embodiment as appropriate.

The upper of the shoe body a is provided with an upper 1
The toe cap 10 is provided so as to be sandwiched between the reinforcing cap 11 and the reinforcing skin 11 provided on the inside thereof. The toe cap 10 serves to enhance the shape retention and strength of the toe portion of the shoe body a, and is formed so as to cover the toe portion of the shoe body a (FIG. 1). The toe cap 10 is integrally formed with the shoe sole 3 by injecting a resin into a molding gap 15 formed between the upper 1 and the reinforcing skin 11 at the same time that the shoe sole 3 is injection-molded. The molding process will be described later.

On the inside of the upper 1 of the shoe body a, a thin sponge material 12 serving as a cushioning material and an interior cloth 13 made of synthetic fiber are overlapped, and these are sewn together with the upper 1. It is stuck in one sheet. That is, the inner surface of the upper 1 made of leather is improved in feel when wearing soccer shoes by the sponge material 12 and the interior cloth 13. As described above, a forming gap 15 is formed between the upper 1 of the toe portion of the shoe body a and the reinforcing bar 11 having a substantially circular arc shape provided inside the upper 1 of the toe portion, The toe cap 10 integrated with the shoe sole 3 is formed inside the forming gap 15.

A molding gap 15 for molding the toe cap 10
Is formed by sewing between the upper 1 and the reinforcing skin 11 along the outer shape of the toe cap 10 to form a molding gap 15 that is closed in a substantially bag shape between the two members 1 and 11. (FIGS. 1 and 4). It should be noted that the sewing line that is the outline of the molding gap 15 determines the outer shape of the toe cap 10. Also,
The shell 1 of the hanging part 1a of the toe part hung on the shoe bottom side
In this case, several through holes 16 for connecting the molding gap 15 and the bottom surface of the shoe body a, in this case, five through holes 16 are formed at regular intervals along the hanging portion 1a of the toe. (Fig. 4).

The through holes 16 are substantially oval holes which connect the molding gap 15 of the toe portion and the shoe bottom. The toe cap 10 formed in the forming gap 15 is integrally connected. That is, the toe cap 10 is formed into a shape along the curved surface of the toe of the shoe body a in the forming gap 15 (FIGS. 1 and 3). The toe cap 10 formed along the curved surface of the toe portion of the shoe body a by injecting the resin into the molding gap 15 has the inner and outer surfaces both facing the inner surface of the upper 1 and the outer surface of the reinforcing skin 11 of the toe portion. Then, it is integrated with the shoe sole 3 via the resin member in each of the substantially oval through holes 16.

That is, the toe cap is formed as a member to be fitted on the toe portion of the shoe body a, and the shape of the toe portion of the upper of the shoe body a in the shoe body a is maintained in the formed shape. In addition, the rigidity and strength of the toe of the shoe body a are increased. The above-mentioned through hole 16 may have a circular cross section or the like, but by making it oval as in this embodiment, the connecting portion between the toe cap 10 and the sole 3 is increased, and both members 10, 10
3 can be improved.

In the hanging portion 1a at a position corresponding to the molding gap 15 in the reinforcing skin 11 provided inside the upper 1 of the toe portion, five cuts cut in a wedge shape are formed as described above. The communication groove 9 is formed by forming a notch at the same interval as the hole 16. The communication groove 9 functions as a resin injection flow path that allows communication between the through holes 16 of the hanging portion 1 a and the molding gap 15. Each of the communication grooves 9 causes the base end of the hanging portion 1a to be positioned directly below the through hole 16 in the reinforcing skin 11, and
A notch is formed so as to rise along a bent portion formed at the toe portion and to communicate with the forming gap 15 on the side surface of the upper 1. The inside of the communication groove 9 is closed by the contact of the sponge material 12 and the interior cloth 13.

Next, a method of manufacturing a soccer shoe configured as described above will be described. 5 and 6 show the shoe main body a before the shoe sole 3 is injection-molded. As described above, the shoe body a is composed of the upper 1, the reinforcing skin 11, and the sponge material 1.
2. After attaching and sewing the interior cloth 13 and the like, and shaping it into a substantially shoe shape, the midsole 2 is fitted into an opening formed inside the hanging portion 1a, and the bottom edge of the midsole 2 Is formed by adhering the hanging portion 1a along the line.

A molding gap 15 for molding the toe cap 10 is formed between the upper 1 and the reinforcing skin 11 at the toe of the shoe body a. A substantially wedge-shaped communication groove 9 is provided from the hanging portion 1a of the toe to the side surface of the reinforcing skin 11 corresponding to the molding gap 15. Note that the communication groove 9 is notched when the reinforcing skin 11 is punched from a raw material of the skin material. The communication groove 9 is formed so as to rise along the bent portion formed in the toe portion and to communicate with the molding gap 15 on the side surface of the upper 1 (FIG. 7).

As described above, the hanging portion 1a of the shoe body a is hung along the periphery of the insole 2 and adhered. At this time, the heel of the hanging portion 1a is firmly fixed by hitting the nail 20 simultaneously with the bonding. After that, oval through holes 16 are respectively formed at predetermined positions of the hanging portion 1a located on the bottom surface of the toe portion, that is, immediately above the base end of the communication groove 9 cut out in the reinforcing skin 11, and each of the through holes 16 is formed. To the communication groove 9. This allows
Each through hole 16 communicates with the forming gap 15, and each communication groove 9 is formed along the gap between the inner surface of the upper 1 and the outer surface of the reinforcing skin 11. And the communication state between them is assured. The perforation positions of the through holes 16 communicating with the molding gap 15 may be arbitrarily changed as described above. You may. Conversely, the through hole may be formed at a position where the through hole is retracted toward the edge of the hanging portion 1a. Further, when the position of each through hole is changed as described above, the length and form of the molding gap communicating with the through hole are also changed correspondingly.

The shoe body a constructed as described above is shown in FIG.
As shown in the figure, after the shoe is attached so that it can be worn on the last b 'formed in the shape of a foot, the shoe body a
A cavity b2 for molding the shoe sole 3 is formed between the bottom surface of the mold and the molding surface b1 of the molding die b (FIG. 8).

When the molding die b is mounted on the bottom surface of the shoe main body a as described above, the rim of the opening of the molding die b is strongly pressed along the outer peripheral portion of the bottom surface of the shoe main body a, and the crimping portion near the toe portion is provided. In this case, an intermediate portion communicating each through hole 16 and the inside of the molding gap 15 is crushed, and a gap that becomes a resin flow path is closed. However, even when the upper 1 and the reinforcing skin 11 are compressed by the molding die b as described above, the communication groove 9 formed by notching the reinforcing skin 11 as described above.
Is not crushed, and is secured as a resin flow path that connects each through hole 16 and the inside of the molding gap 15.

Next, urethane resin in a molten state is injected into the cavity b2 from the injection hole b3 of the mold b, and the shoe sole 3 is formed on the bottom surface of the shoe body a. The resin injected into the cavity b2 fills the cavity b2 that becomes the shoe sole 3, passes through the through holes 16 exposed on the bottom surface of the shoe body a, and enters the molding gap 15 at the toe of the shoe body a. It is press-fitted (FIGS. 7 and 8). At this time, the injected resin flows from each through hole 16 through the communication groove 9 into the molding gap 15.

Due to the pressure at the time of injection of the resin, the molding gap 15 is evenly filled with a synthetic resin, and the shoe sole 3 is molded in the cavity b2. Molded. That is, the toe cap 10 is molded in a state of being fitted to the toe of the shoe body a, and is integrated with the shoe sole 3 via the resin member in the through hole 16. Further, as described above, since each through hole 16 is formed in a long hole shape, the strength of the connecting portion between the toe cap 10 and the shoe sole 3 is sufficiently ensured, and the coupling force between the two members 3 and 10 is increased. Can be effectively improved.

Further, the resin filled in the molding gap 15 formed along the toe portion of the shoe body a is streaked along the inside of the communication groove 9 so that the toe cap 1 is formed.
The toe cap 10 is formed like a rib material along the inner surface of the toe cap 10, and the strength of the toe cap 10 can be improved. Further, the hanging portion 1a of the upper 1 of the toe is firmly adhered to the shoe sole 3 of the toe and the base end of the toe cap 10 (FIG. 1). After a lapse of a predetermined time, when the synthetic resin injected into the mold b is hardened, the mold b is separated and the product is removed, so that the shoe sole 3 is adhered to the bottom surface of the shoe body a. Molded.

In the soccer shoe configured as described above, the toe cap 10 molded in the molding gap 15 is entirely adhered between the upper 1 and the reinforcing skin 11. Further, the toe cap 10 and the toe portion of the shoe sole 3 are formed integrally with each other via a member that fills the through hole 16. Therefore, the upper 1 and the sole 3 of the toe, which are easily peeled, can be firmly connected to each other via the resin member that fills the through hole 16. As a result, the upper 1 of the toe and the shoe sole 3 made of synthetic resin can be prevented from peeling off. Further, since the toe cap 10 is formed in the same shape as the curved surface of the toe portion of the shoe body a in a state where the toe cap 10 is completely adhered between the upper 1 and the reinforcing skin 11 of the toe portion,
The shape of the curved surface of the toe is maintained in the molded state, and the shape retention and rigidity of the upper 1 of the toe can be effectively improved.

The toe portion of the shoe main body a where the toe cap 10 is provided is a range where the toes of the user touch. The height dimension of the toe cap 10 of the present embodiment is 10 mm to 10 mm from the boundary between the shoe sole 3 and the bottom surface of the shoe body a at the toe.
It is set to about 15 mm. The toe cap 10
Can be arbitrarily changed by changing the shape of the molding gap, that is, the outline of the sewing.

As described above, the molding gap 15 for molding the toe cap 10 can be arbitrarily set by the outline of sewing. However, according to the gist of the present invention, the molding gap for molding the toe cap is not shown in FIG. It may be configured without providing a sewn portion as an outline like a soccer shoe shown at 10. In this case, the molding gap 15 'is
By forming the reinforcing skin 11 on the inside without doing anything, or by bonding the outer peripheral edge portion of the reinforcing skin 11 to the inner surface of the upper 1, a forming gap 15 'is formed between the two 1, 1 As described above, together with the injection molding of the sole 3, the molding gap 15 ′ is formed.
The toe cap 10 ′ may be formed by injecting a resin into the inside. In this case, the outer shape of the toe cap 10 'is also slightly wavy because the outer shape of the molding gap 15' is not clearly formed. However, functionally, the toe of the soccer shoe shown in FIG. There is no difference from the cap 10.

The toe portion of the soccer shoe shown in FIG. 10 is provided with a through hole 51 penetrating from the shoe sole 3 through the hanging portion 1a of the shoe body a and the insole 2 as described above. The resin is filled into the through hole 51 when injection molding is performed to form a pin portion 52 for connecting the shoe sole 3 and the bottom surface of the shoe body a. A plurality of the pin portions 52 are provided at appropriate intervals along the toe portion of the shoe body a.
The sole 3 at the toe portion is formed by the coupling force between
And the shoe body a have a stronger adhesive force. Incidentally, the coupling structure between the pin portion 52 and the through hole 51 is described in
It is exactly the same as the pin portion and the through hole disclosed in No. 3303, and is a very effective means for increasing the adhesive strength between the upper of the toe and the sole of the shoe.

In the soccer shoe shown in FIG. 1 described above, a reinforcing gap 11 is provided inside the upper 1 and sewn to form a toe cap 10 between the members 1 and 11. Was molded, but the molding gap 15
Is the upper 1 like the soccer shoes shown in FIG.
May be constructed by providing a reinforcing skin 11 on the surface of the upper shell 1 and sewing the outer peripheral edge of the reinforcing skin 11 to the upper 1. In this case, the through hole 16 of the hanging portion 1a is formed in the reinforcing skin 11 located outside on the hanging portion 1a, and the communication groove 9 is formed on the upper skin located on the inside of the hanging portion 1a. 1 is notched.

As described above, in the soccer shoes shown in FIGS. 1, 9 and 10, the communication groove 9 is notched in order to make the flow of the resin filled into the molding gap 15 from the through hole 16 smoother. Formed. However, the present invention is different from the soccer shoe shown in FIG.
6 may be directly seen into the molding gap 15. In this case, the injection resin flows into the molding gap 15 through the through hole 16 at the same time as the injection molding of the shoe sole 3, and the same as the soccer shoes shown in FIGS. 1, 9, and 10 in the molding gap 15. The toe cap 10 can be molded. In the soccer shoe shown in FIG. 11, the upper 1 was disposed outside and the reinforcing leather 11 was disposed inside to form a forming gap 15, and the toe cap 10 was formed in the forming gap 15. However, even in the case where the through hole 16 is directly viewed into the molding gap 15 as described above, FIG.
2, the toe cap 10 may be molded in a molding gap 15 having the reinforcing skin 11 on the outside and the upper 1 on the inside.

The present invention also relates to a sponge material 1 to be mounted on the inner surface of the upper 1 if the forming gap 15 for forming the toe cap 10 is formed between the upper 1 and the reinforcing skin 11.
2, the interior cloth 13 and the like may be provided at any position of the skin layer constituting the toe. For example, as shown in FIG. 13, between a toe portion of the upper 1 and a reinforcing skin 11 sewn to the inner surface thereof, a sponge material 12 and an interior cloth 13 covered on the inner surface of the upper 1 Between the reinforcing skin 11 and the interior cloth 13
In the molding gap 15 formed between the toe cap 1
0 may be molded. A tape 60 is attached along the upper edge of the reinforcing skin 11 to cover a step caused by the edge of the reinforcing skin 11.

FIG. 14 shows a sponge material 12 mounted on the inner surface of the upper 1 sandwiched between a toe portion of the upper 1 and a reinforcing leather 11 sewn on the inner surface thereof. The toe cap 10 is formed in a forming gap 15 formed between the reinforcing leather 12 and the reinforcing skin 11. In this case, the interior cloth 13 applied to the inner surface of the sponge material 12 is applied along the inner surface of the reinforcing skin 11 at the toe portion, thereby covering a step caused by the edge of the reinforcing skin 11.

In the present invention, the shape of the communication groove is not limited to a substantially wedge shape, but may be any shape as long as it can communicate the through hole and the molding gap. Further, the above-mentioned communication groove is formed by cutting the reinforcing skin or the upper, but the surface of the reinforcing skin or the upper may be formed in a concave shape by pressing or cutting. Although the above embodiment is configured as a soccer shoe, the present invention can be similarly applied to athletic shoes other than soccer shoes, for example, baseball shoes, golf shoes, and work shoes.

[0040]

As described above, according to the present invention, a molding gap is formed between the upper and the upper skin at the toe of the shoe body, and a shoe sole made of synthetic resin is injection-molded on the shoe body. Since the synthetic resin is injected into the molding gap through the through hole of the hanging portion and the toe cap is molded in the molding gap, the toe cap molded in the molding gap is formed. The toe cap and the sole of the shoe sole are formed in a state in which the toe cap and the sole of the shoe are integrated with each other through a member that fills the through-hole portion, and is entirely adhered between the upper and the reinforcing skin. Therefore, the toe cap is integrated with the toe of the shoe sole via the member of the through hole, and is molded as a member to be fitted with the toe of the shoe body, and the curved shape of the toe of the upper in the shoe body is formed. By keeping the shape as it is, the rigidity and shape retention of the toe of the upper can be greatly improved. Therefore, when the above structure is adopted for a soccer shoe, good ball control is possible, and a kick force on the ball can be efficiently exhibited. Further, since the toe cap firmly couples the upper of the toe and the sole of the toe to which a relatively large load is applied, through a member filling the through-hole, the upper of the toe and the sole of the synthetic resin. It is possible to avoid the problem that the toes are peeled off, and to greatly improve the durability of the toe portion.

According to the method for manufacturing athletic shoes of the present invention, a molding die is mounted on the bottom surface of the shoe body and the synthetic resin shoe sole is injection molded, and at the same time, the injected resin passes through the through holes and the communication grooves. Then, it is injected and filled into a molding gap formed between the upper skin of the toe and the reinforcing skin, and the toe cap can be molded in the molding gap. Therefore, at the same time as forming the shoe sole on the bottom surface of the shoe main body, the toe cap made of synthetic resin was molded in a state of being incorporated between the upper skin of the toe portion and the reinforcing skin, and the toe portion was reinforced with the toe cap. Athletic shoes can be manufactured efficiently. Further, the toe cap formed as described above is formed as a member to be fitted on the toe portion of the shoe main body by being formed in a state of being completely adhered between the upper skin and the reinforcing skin of the toe portion, Since the curved shape of the toe portion of the upper of the shoe body in the shoe body can be maintained as it is, the shape retention and strength of the toe portion of the shoe body can be effectively improved. Furthermore, since the toe cap firmly couples the upper of the toe and the sole of the toe to which a relatively large load is applied, via a member that fills the through hole, the upper of the toe and the sole of the synthetic resin. Can be avoided.

Further, when the mold is mounted on the bottom surface of the shoe body, the outer periphery of the bottom surface of the shoe body and the mold are strongly press-fitted to maintain the tightness of the molding gap. The portion communicating with the gap is crushed, and it becomes difficult to inject the resin into the molding gap. However, according to the manufacturing method of the present invention, even when the crimping force of the molding die is applied to the outer periphery of the bottom surface of the shoe main body as described above, the communication groove for connecting the through hole and the molding gap has a flow of the injected resin. Since it is secured as a path, the resin can be smoothly injected from the through hole into the molding gap, and the toe cap can be reliably molded using the molding gap.

[Brief description of the drawings]

FIG. 1 is a side view of a soccer shoe embodying the present invention, which is partially cut away.

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

FIG. 3 is a perspective view showing the soccer shoe partially cut away.

FIG. 4 is a bottom view in which a bottom surface of a toe portion of the shoe body is partially cut away.

FIG. 5 is a plan view of the shoe main body.

FIG. 6 is a bottom view of the shoe main body.

FIG. 7 is a partially cutaway side view showing a state in which the shoe body is mounted on the molding die.

FIG. 8 is a longitudinal sectional front view showing a toe portion of a shoe body attached to a molding die.

FIG. 9 is a side view of a soccer shoe in which a reinforcing skin is provided on the surface of the upper of the toe, with a portion cut away.

FIG. 10 is a side view, partially cut away, showing a soccer shoe in which a molding gap is formed without sewing the upper of the toe and the reinforcing skin.

FIG. 11 is a longitudinal sectional view showing a toe portion of a soccer shoe in which a through-hole is directly viewed into a molding gap.

FIG. 12 is a longitudinal sectional view showing a toe portion of a soccer shoe in which a through hole is directly viewed into a molding gap and a reinforcing skin is provided on a surface of an upper of the toe portion.

FIG. 13 is a longitudinal sectional view of a toe portion of a soccer shoe in which a toe cap is formed in a forming gap formed between a reinforcing skin and an interior cloth.

FIG. 14 is a longitudinal sectional view of a toe portion of a soccer shoe in which a toe cap is formed in a forming gap formed between a reinforcing skin and a sponge material.

[Explanation of symbols]

 a ... Shoe body 1 ... Upper 2 ... Middle sole 3 ... Sole 9 ... Communication groove 10, 10 '... Toe cap 11 ... Reinforcement leather 15, 15' ..Molding gap 16: Through hole

Claims (2)

[Claims] An athletic shoe formed by injection molding a synthetic resin shoe sole along a bottom surface of an upper constituting a shoe main body, wherein the upper and the upper of a toe portion of the shoe main body are provided. A forming gap is formed between the inner and outer reinforcing skins, and both upper and lower skin materials suspended on the bottom surface of the toe portion of the shoe body are located on the outer side. A through-hole communicating with the molding gap is formed in the skin material, and a synthetic resin shoe sole is injection-molded on the bottom surface of the shoe body,
Injecting synthetic resin into the molding gap through the through hole,
An athletic shoe formed by forming a toe cap in the forming gap. 2. A method for manufacturing athletic shoes, comprising injection molding a sole made of synthetic resin along a bottom surface of an upper constituting a shoe main body. A molding gap of a predetermined shape is formed between the upper skin and the reinforcing skin provided on the inner or outer side of the upper, and the upper and lower skin materials suspended on the bottom surface of the toe portion of the shoe main body. A through-hole is formed in the outer skin material, and a space between the through-hole and the molding gap is located inside the skin material of the upper and the reinforcing skin. Through a communication groove formed in the leather material to be formed, and after mounting a mold on the bottom surface of the shoe body, simultaneously inject synthetic resin into the mold to form a shoe sole on the bottom surface of the shoe body. The synthetic resin is injected and filled into the molding gap through the through hole and the communication groove. A method for producing athletic shoes, comprising forming a cap.