JP2801875B2 - 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, as shown in FIGS. 7 and 8, soccer shoes, golf shoes and the like are constituted by providing a synthetic resin shoe sole 103 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 1
01 is fixed to the opening at the bottom of
The outer periphery of the shoe sole of the upper 101 is suspended and adhered to the outer periphery of the bottom surface of the shoe 02.

[0003] Thereafter, the bottom of the upper 101, that is, the exposed portion of the lower surface of the midsole 102 and the suspended portion 105,
A sealing sheet 104 cut into a substantially shoe sole shape is attached, and a shoe sole 103 made of a synthetic resin is injection-molded on the bottom surface of the upper 101.

[0004]

The sealing sheet 104 is made of a relatively thin and coarse synthetic fiber cloth.
It is stuck to the lower surface of the midsole 102 where the periphery of the sole of the upper 101 is suspended using an adhesive. Filling sheet 104
Is used to cover the unevenness of the bottom surface of the upper 101 caused by the suspension and to make the surface smooth, and to form the shoe sole 103 made of synthetic resin on the bottom of the leather by injection molding.
It is adhered to the bottom surface of the upper 101 for the purpose of preventing a problem that the injection resin is press-fitted from a fine gap generated at the edge of the joint portion between the inner bottom 5 and the inner bottom 102.

[0005] However, since the sealing sheet 104 adhered to the bottom of the upper 101 for the above-mentioned purpose is made of synthetic fiber cloth or the like, the upper 10 made of a leather whose surface is finely roughened.
Compared with the hanging portion 105 and the insole 102, the adhesiveness of the synthetic resin shoe sole 103 by injection molding is inevitably lower. Accordingly, in the shoe configured as described above, a synthetic resin shoe sole 103 molded on the bottom surface of the upper 101 is subjected to a large load or repeated use.
However, there was a case where the peeling began to peel from the bottom surface of the upper 101 to which the sealing sheet 104 was attached, and finally the periphery of the shoe sole 103 was opened. Incidentally, most of the peeling of the shoe sole 103 caused by the above-mentioned reason is caused by a toe portion to which a load is particularly applied during use.

[0006] An object of the present invention is to prevent the shoe sole from peeling off by increasing the adhesive force between the bottom surface of the upper and the sole of the toe in the shoe having the above-mentioned structure.

[0007]

SUMMARY OF THE INVENTION 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 extends along the outer periphery of the bottom of the midsole. Then, the peripheral portion of the shoe sole on the upper side is suspended and fastened, and a sealing sheet is attached to the bottom surface of the upper to cover the joint edge of the insole and the suspended portion. In a shoe made by injection-molding a synthetic resin shoe sole on the bottom surface, the filling sheet is formed by cutting off the area where the toe of the toe portion is cut, and injection molding is performed through the cutout portion of the filling sheet. Is directly bonded to a member on the bottom surface of the upper.

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 suspended and fixed along the perimeter of the insole fixed to the bottom opening of the upper. A sealing sheet is attached to the bottom surface of the upper to cover the edge of the joint between the midsole and the suspended portion. A synthetic resin shoe sole is injection-molded on the bottom surface of the upper. Therefore, the shoe sole is adhered to the filling sheet and the upper bottom member.

[0009] The filling sheet is formed in such a form that a toe portion is cut off. Therefore, the synthetic resin shoe sole injection-molded on the bottom surface of the shoe is widely and directly adhered to the member constituting the bottom surface of the shoe via the cutout portion of the sealing sheet at the toe portion.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. A shoe a1 shown in FIGS. 1 to 4 is a soccer shoe embodying the present invention. In this soccer shoe, an upper 1 made of leather is formed, an opening at the bottom of the upper 1 is closed by an inner sole 2, and a sealing sheet 4 is attached to the lower surface of the inner sole 2. The shoe sole 3 made of synthetic resin is injection-molded on the bottom surface of the insole 2.

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. Configure. Upper 1 sewn as described above
Is formed by suspending and adhering the peripheral portion on the shoe sole side along the peripheral edge of the bottom of the insole 2 and bonding the same to form a substantially shoe shape.

By the way, the above-mentioned hanging operation will be described in detail. At the time of manufacturing, the upper 1 having the above-mentioned habit is formed so as to correspond to the outer shape of the foot as shown in FIG. It is fitted upside down with respect to the last c.
The inner bottom 2 is fixed to the bottom surface of the last c in a state where the inner bottom 2 is in close contact with the bottom c, and the inner bottom 2 is fitted into the bottom opening of the upper 1.

The suspended portion 1a of the upper 1 fitted to the last c as described above is coated with an adhesive to form
Adhesion is performed while hanging along the outer periphery of the side surface of the shoe sole, and the heel is fastened using a nail 5 or the like. Next, as shown in FIG. 5, the sealing sheet 4 is adhered to the bottom part of the insole 2 exposed from the upper part 1a.

The filler sheet 4 is made of a synthetic fiber cloth, is cut into a shoe sole shape having an outer shape slightly smaller than the bottom surface of the upper 1, and is cut into a shape in which a toe portion is cut off.

The sealing sheet 4 is coated with an adhesive on both sides to adhere 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 (FIG. 5, FIG. 5). (Fig. 6). By bonding the filling sheet 4, the unevenness of the bottom surface of the upper 1 is adjusted, and the midsole 2 and the hanging portion 1 are fixed.
The edge b of the joint portion with the portion a is covered, and the adhesive gap generated in the portion is sealed.

On the other hand, the bottom surface of the upper 1 corresponding to the cut portion of the filling sheet 4 is in a state where the midsole 2 and the hanging portion 1a are exposed. Also, a portion of the bottom surface of the upper 1 that is not covered with the sealing sheet 4, that is, a toe portion and an outer peripheral portion are buffed to finely roughen the surface of the material to which the shoe sole 3 is bonded.

A mold for injection molding (not shown) is brought into close contact with the bottom surface of the upper 1 after buffing, and joined to form a molten resin by injection molding. Thereby, the shoe sole 3 made of synthetic resin is integrally formed on the bottom surface of the upper 1.

The shoe sole 3 injection-molded as described above is entirely adhered to the bottom surface of the upper 1 by the adhesive property of the molten synthetic resin. As described above, the adhesiveness of the synthetic resin shoe sole 3 formed by injection molding is relatively low with respect to the sealing sheet 4 made of synthetic fiber cloth, but with respect to fine and rough leather. Sufficiently high and strong bonding is possible.

Therefore, in the shoe configured as described above, a sufficient adhesive strength of the shoe sole 3 can be obtained at the toe portion largely exposed by the cut off of the sealing sheet 4 and the portion around the bottom surface. In particular, at the toe portion where the sole of the shoe is likely to peel off, the sole 3 is directly adhered to the inner sole 2 and the hanging portion 1a via a wide area corresponding to the cutout portion of the sealing sheet 4. Therefore, it is possible to effectively prevent the shoe sole 3 from peeling off.

As described above, the range of the directly bonded portion of the toe portion of the shoe sole 3 is determined by the cutout range of the toe portion of the filling sheet 4. In the above-described embodiment, the cut-off range of the toe portion of the filling sheet 4 is set using the range where the toe touches as a guide.

As described above, the above-mentioned sealing sheet 4
Is provided to prevent the resin in a molten state from flowing into the gap formed at the joint edge b between the midsole 2 and the hanging portion 1a when the shoe sole 3 is injection-molded. Therefore, in the shoe of the present invention, there is a possibility that the molten resin may flow into the directly bonded portion of the shoe sole 3 corresponding to the cut portion of the sealing sheet 4 on the bottom surface of the upper 1. . However, by using an appropriate adhesive, and by reliably performing the work of bonding the hanging portion 1a, which is the direct bonding portion of the shoe sole 3, it is possible to prevent the molten resin from flowing into the same portion within a substantial range. Is possible.

[0022]

As described above, in the shoe of the present invention, the filling sheet is formed in a shape in which the toe portion of the toe portion is cut off, and the cutout portion of the filling sheet is applied to the bottom surface of the upper. A sole made of a synthetic resin to be injection-molded is directly adhered to a bottom member of the upper with good adhesiveness, and in particular, the adhesive force of a toe portion to which a load is applied is improved. Therefore, as compared with the conventional one in which the sealing sheet is completely adhered to the upper surface of the upper, the peeling of the toe portion of the shoe sole can be effectively prevented, and repeated use is repeated. Also, the durability of the shoe can be improved without peeling of the toe portion of the shoe sole.

[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. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a perspective view showing a state in which a suspended portion is suspended around an inner bottom.

FIG. 6 is a perspective view showing a state in which the bottom surface of the upper has been buffed.

FIG. 7 is a longitudinal sectional view showing a conventional shoe.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7;

[Explanation of symbols]

 a ... shoes b ... rim of joint 1 ... upper 1a ... hanging part 2 ... midsole 3 ... shoe sole 4 ... filling sheet

Claims (1)

(57) [Claims] An insole is fixed at an opening of a bottom surface of an upper formed in a substantially shoe shape, and a peripheral portion of the upper of the upper is suspended and fixed along an outer periphery of the bottom of the inner sole. A shoe formed by attaching a sealing sheet to the bottom surface of the upper to cover the rim of the joint between the midsole and the suspended portion, and injection-molding a synthetic resin shoe sole on the lower surface of the upper. The filling sheet has a shape in which the toe of the toe portion is cut off, and the shoe sole formed by injection molding is directly adhered to the member of the bottom of the upper through the cut portion of the filling sheet. Shoes.