JPH0131041Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to sports shoes characterized by a stud fixing structure.

For example, in sports shoes such as soccer shoes, as shown in FIG. 1, a number of studs 3 are provided so as to protrude from the bottom surface thereof. In order to provide such a stud 3, it has been known to provide an outer skin layer 2 made of resin on the lower surface of the shoe body 1 and form the stud 3 integrally therewith. However, when the outer skin layer 2 and the stud 3 are integrally formed in this way, the shoe body 1 is exposed to high heat, which causes various problems, so it is not recommended to subject the stud 3 to heat hardening treatment. In the end, it was not possible to provide sufficient studs.

On the other hand, it has been proposed that the studs 3 are molded separately from the outer skin layer 2, subjected to a hardening treatment alone, and then fixed to the outer skin layer 2. That is, as shown in FIG. 2, a stud 3 is formed which has a columnar overall shape and whose end surface 32 on the side of the base 31 is a rough surface.
It is buried inside and fixed. In the diagram, 3
4 is a protrusion that defines the distance between the main body of the stud 3 and the shoe main body 1. However, in sports shoes with such a configuration, even when the outer skin layer 2 is formed by injection molding, it is not integrated with the studs 3, and the base 3 of the studs 3
Since the stud 1 is simply embedded in the outer skin layer 2, the fixing strength of the stud 3 is insufficient, and the stud 3 easily comes off when an impact force is applied.

The present invention was developed against the above-mentioned background, and its purpose is to provide sports shoes that have excellent durability and have studs that have high mechanical strength and are difficult to fall off. It is in.

The features of the present invention include a shoe body, an outer skin layer made of shrinkable hardening resin formed on the lower surface of the shoe body, and a columnar shape whose base is embedded in the outer skin layer so as to protrude from the outer skin layer. The stud has a flange portion projecting outward at its base, and a hole into which the resin constituting the outer skin layer is injected at the end surface of the base.

An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, as shown in an enlarged view of the main part in FIG. 3, an outer skin layer 2 is formed on the lower surface of the shoe body 1, and a base 31 of a stud 3, which will be described later, is embedded within this outer skin layer 2. It is composed of

Here, the outer skin layer 2 is made of a resin having the property of shrinking upon curing (hereinafter simply referred to as "shrinkage hardening"), such as hard urethane resin or nylon.

Further, as shown in FIGS. 3 and 4, the stud 3 is made of, for example, hard urethane resin, has a truncated conical shape as a whole, and has a base 31.
A flange portion 35 projecting outward is formed on the
In addition, a bottomed hole 3 is provided in the center of the end surface 32 on the base 31 side.
6 is formed, and the necessary hardening treatment has been performed. Furthermore, the hole 36 has a plurality of grooves 37 formed on its inner circumferential surface that extend in a direction intersecting the axis of the hole 36 . The flange portion 35 of the stud 3 is completely embedded in the thick part 21 of the outer skin layer 2 formed along the outer periphery of the stud 3, and the outer skin layer 2 is formed in the hole 36 of the stud 3. A locking protrusion 22 is formed integrally with the outer skin layer 2 by being filled with a resin.

Sports shoes having such a structure are manufactured by a cast molding method, as shown enlarged in FIGS. 5 and 6.

The mold 4 used for this molding has a placing part 41 on its upper surface for placing the shoe body 1, which has a surface shape that matches the shape of the lower surface of the shoe body 1, and this placement part 41. Stud holding holes 42 that match the outer peripheral shape of the stud 3 are bored in the surface of the stud 3 at a plurality of locations where the stud 3 is to be placed. Furthermore, this stud holding hole 42
A ring-shaped cutout step 44 is formed around the upper portion of the stud 3 to form a thick wall portion 21 that covers the flange portion 35 of the stud 3. In the figure, 43 is a resin injection passage for supplying molten resin from the outside of the mold 4 to the mounting portion 41, and 45 is an exhaust passage that communicates the stud holding hole 42 with the outside of the mold 4. After the stud 3 is positioned in each stud holding hole 42 of the mold 4, the shoe body 1 is inserted into the protrusion 3 of the stud 3 on its lower surface coated with adhesive.
4 on the mounting section 41. Above the mold 4, the outer periphery of the Shuse main body 1 is closed by a movable mold, and the resin injection passage 4
Step 3: Inject the shrink-hardening molten resin. As a result, the gap between the shoe body 1 and the surface of the mold 4 placement part 41, the notch step 44 of the stud holding hole 42, and the hole 36 of the stud 3 are filled with molten resin, so that the resin is hardened. The outer skin layer 2 is formed and the stud 3 is fixed at the same time. Note that the air present in the gap between the Suse main body 1 and the surface of the mounting portion 41 of the mold 4 is pushed by the injected molten resin and exhausted from the exhaust passage 45.

In the sports shoes configured as described above, the flange portion 35 of the stud 3 is embedded in the outer skin layer 2, and since the resin constituting the outer skin layer 2 is a shrinkable hardening resin, it does not shrink as the resin hardens. As a result, the flange portion 35 of the stud 3 is tightened, and the flange portion 35 is firmly fixed.
By extending inside the stud 3 toward its center, the stud 3 and the outer skin layer 2 are engaged multidimensionally and are integrally connected, so that the stud 3 is connected to the outer skin layer 2. 2 is firmly fixed. Therefore, the stud 3 will not come off even if it receives a large impact force such as bending or twisting. Further, in this example, since the groove 37 is formed in the hole 36 of the stud 3, the strength in the axial direction between the locking projection 22 and the stud 3 is also sufficient.

FIG. 7 shows a modification of the hole 36 in the stud 3. In this example, the hole 36 is formed so as to gradually increase in diameter from the base 31 of the stud 3 toward the tip, and is similar to the one described above. It has the same effect as the example.

As described above, according to the present invention, it is possible to firmly fix studs with high mechanical strength to the outer skin layer, and therefore provide sports shoes that have excellent durability and are difficult to detach from. I can do it.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of sports shoes, FIG. 2 is an explanatory sectional view showing an enlarged main part of a conventional sports shoe, and FIG. 3 is a sports shoe according to an embodiment of the present invention. FIG. 4 is an end view of a stud base used in a sports shoe according to an embodiment of the present invention, and FIGS. An explanatory cross-sectional view showing a manufacturing method for sports shoes according to an embodiment, an explanatory cross-sectional view showing an enlarged view of the main parts, and FIG. 7 is an explanatory cross-sectional view showing a modified example of the stud in the embodiment of the present invention. It is. 1...Shuse main body, 2...Outer skin layer, 21...
Thick part, 22... Locking protrusion, 3... Stud, 3
1...Base, 32...End face, 34...Protrusion, 35
...flange part, 36 ... hole, 37 ... groove, 4 ...
... Mold, 41 ... Placement section, 42 ... Stud holding hole, 43 ... Resin injection passage, 44 ... Notch step, 45 ... Exhaust passage.

Claims (1)

[Claims for Utility Model Registration] A shuse main body, an outer skin layer made of shrinkable hardening resin formed on the lower surface of the shuse main body, and a pillar-shaped column whose base is embedded in the outer skin layer so as to protrude from the outer skin layer. 1. Sports shoes comprising a stud, wherein the stud has a flange portion protruding outward at its base, and a hole into which resin constituting the outer skin layer is injected at the end surface of the base.