JPH0516841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to sports shoes or boots, and particularly to shoes for soccer cars.

(Prior Art) West German Published Patent Application (DE-OS) No. 3148038 discloses sports shoes or boots of the type described above, in which each stud is a protrusion integral with the bottom; an annular body supported by the protrusion;
A rivet case portion also supported by the protrusion is provided. This rivet case part rests against the underside of the outsole by means of a ring which is fixed to the projection by an active connection and exhibits compressive elasticity. The stud case is made of a material that is considerably more resistant to abrasion than the material of the outsole, and is therefore less resilient than the latter. However, since the protrusion carrying the stud case part and the annular body is integrated with the outsole made of a material that can be more easily deformed, the protrusion is subjected to compressive force and bending direction load. The rivet can be deflected when the rivet is bent, so that the entire rivet having that configuration has elasticity. By virtue of its characteristics, the outsole is subjected to a lower level of loading than the ground-engaging surface of the stud, while retaining the flexibility of the stud that is typical for soles equipped with studs. cheaper,
It can be manufactured from a softer material without reducing the useful life of the studded sole.

Also, the entire outsole for sports shoes or boots with integrally formed studs is made of a material that is highly resistant to abrasion, thereby reducing the rate of abrasion that occurs at the stud locations, and It is also known to try to increase the useful life of the outsole, which has consequences. However, because the stud material is harder and more resistant to abrasion, the stud is relatively inflexible and therefore has shock absorption properties, which are desirable in themselves for studded shoes and boots. However, as a result, it is considerably reduced.

Finally, also with regard to plugs or iron hooks, i.e. replaceable gripping elements, elastic rubber can be used between the holding part, for example made of metal, and the support part, which forms the ground-engaging surface and is made of a wear-resistant material. It is already known to provide an elastic rubber body which is connected to the holding part and to the supporting part by vulcanization (DE-OS 2313646). . However, such a method of fixing the lower stud portion forming the ground engagement to the flexible annular body and the outsole,
Due to the price of shoes or boots with studs, we cannot accept them. Because each stud is
This is because it is necessary to manufacture the lower body part of the stud and the elastic rubber body separately, and it is necessary to connect these parts to each other and to the outsole. Furthermore, it is not possible to make sulfided connections for all arbitrary combinations of sole materials.

OBJECT OF THE INVENTION The object of the invention is to provide studded sports shoes or boots of the above-mentioned type, which, due to the outsole and the studs, are wear-resistant and therefore more rigid. An object of the present invention is to provide sports shoes or boots with rivets that can have the desired damping elasticity of the rivets even when using a material with a rivet.

(Means and Effects for Solving the Problems) According to the present invention, the objects are achieved by the forms described in the claims.

In the known stud configuration, which the present invention takes as its basic starting point, the outsole and therefore the stud projection to which the stud case part is to be attached are elastically deformed by compression. The rivet is made of a material that is capable of flexing, which ensures that the entire rivet has a shock-absorbing effect, even though the rivet housing part is relatively inflexible. Conversely, in the present invention, the outsole, the lower part of the stud body, and the connecting handle connecting the stud body to the outsole are made of a material that is relatively resistant to abrasion; This material therefore does not deform appreciably under compressive forces. Nevertheless, in its composition,
The entire stud has the desired flexibility. This is because the connecting shank is generally relatively thin compared to the transverse dimension of the stud, for example its diameter is only one quarter of the diameter of the stud. This means that even when a slightly eccentric load is applied to the rivet, i.e. even when the force on the rivet is not in the axial direction of the connecting shank, the flexible annulus is compressed on one side. At the same time, the connecting handle portion is made to bend elastically. Since it is only in very rare circumstances that the force applied to the stud is precisely aligned with the axis of the connecting shank, such a tilting movement of the stud will provide the desired elasticity for the stud. I will do it. Furthermore, even when the connecting handle is subjected to a central load, the connecting handle is relatively highly compressed due to its small cross section;
In that case as well, the stud will have the desired bending properties.

Thereby, according to the invention, the elastically bendable annular body is actively fixed to the stud, so that the annular body is made of a material that cannot be connected to the outsole; Or it can be made of a material that can only be connected to the outsole with certain difficulty. However, according to the invention it is advantageous for the annular body and the outsole to be made of materials that are connected to each other by a molding operation. This is particularly the case, for example, when polyurethanes of different densities are used for the outsole and the lower part of the studs, i.e. the material is hardened and resistant to contain primarily elasticity in the bending direction. When polyurethane is used as the abrasion form, the material for the annular body is in an elastomerically compressible form.

It will be appreciated that the effect that the invention seeks to achieve depends on the respective relationship between the elastic modulus of the annular body material and the elastic modulus of the outsole material. However, even when using a relatively stiff sole material that is primarily elastic in the direction of flexure, if the inner diameter of the annular body, and therefore the diameter of the connecting shank, is only a quarter of the diameter of the stud. If it is between 1 and half, the stud has sufficient flexibility.

The manufacturing method is relatively simple. That is, before the outsole is molded, the elastic annular body is placed in a recess in a molding tool that forms the stud. In a subsequent molding step, a flowable plastic material passes through the annulus and into the lower part of each recess in the mold, thereby forming a stud integral with the outsole. do. In this connection, there is no problem in that the annular body is located in direct contact with the underside of the outsole, that is, in the plane of the outsole. This is because the elasticity of the tack is essentially determined by the annular body, which may be located closer to the ground-engaging surface of the tack. . What that means is that there is no strict need to maintain the outer diameter of the annular body precisely. the annular body automatically assumes a position corresponding to its outer diameter within the recess of the forming tool;
In this case, the recess has a slightly conical shape as a whole.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

The sports shoes or sports boots shown in FIG. 1 are, for example, football boots, and have an upper part 1 and an outsole 2 connected to the upper part 1, the outsole 2 comprising: It is made of a flexible, elastic material, such as polyamide or polyurethane, and has a relatively high resistance to abrasion due to abrasion. A plurality of studs 3 are integrally formed on the outsole 2, as can be seen more clearly from FIG. The outsole 2 has, for example, twenty such studs 3.

As can be seen from FIG. 2, the stud 3, which tapers slightly downwards to form a conical shape, essentially has a lower stud portion 4;
A handle portion 5 connecting this lower stud portion 4 to the outsole 2
and an annular body 6. This annular body 6
is made of an elastomer, such as polyurethane, which can be elastically deformed by pressure, and the height of the annular body 6 is approximately half of the overall height of the stud 3. In the illustrated embodiment,
The inner diameter of the annular body 6 is only half its outer diameter, so that the diameter of the connecting shank 5 also corresponds only to approximately half the transverse dimension of the stud 3.
As can be seen from FIG. 2, the upper bounding surface of the annular body 6 is not located within the surface of the outsole 2, but is located slightly below it. Such positioning creates on the outsole 2 a somewhat downwardly projecting base 7 which, via the shape of the rounded edge, blends into the downwardly facing surface of the outsole 2. There is. The inner edge of said annular body 6 is well rounded (second
(see figure).

In the illustrated embodiment, the connecting handle 5 is arranged concentrically with respect to the stud 3, which has a straight truncated conical shape. However, it is also possible to adopt a somewhat eccentric construction thereof, so that said stud 3 has the property of bending on one side when it comes into contact with the ground.

When manufacturing the outsole 2, a previously manufactured annular body 6 is installed in a molding recess in a mold (not shown). Then, after the forming tool is closed, a flowable plastic material is injected into the mold to produce the outsole 2. In that state, the opening in said annular body 6 serves as a passage for the plastic material forming the lower part 4 of the stud 3 to flow, said lower part 4 thus
The outsole 2 is made of a wear-resistant material. In that condition, each toroid 6 is somewhat compressed by the pressure used during the injection molding operation, so that the material of the toroid 6 and the material of the outsole 2 are bonded or welded between them. Even in the absence of bonding, it is ensured that the upper and lower sides of each annular body 6 bear properly against the mating surface of the stud 3. As a modification of the manufacturing method described above, each of the annular bodies can be molded in situ. The technique requires the use of a displaceable punch member within the forming tool in a known manner.

The embodiment shown in FIG. 3 differs from the previously described embodiments only with regard to the shape of the connecting handle and the annular body, which has a correspondingly different shape. For that reason, except for those two parts, FIG. 3 uses the same reference numerals as FIG. 2. In the embodiment of FIG. 3, the connecting handle 5' is
the flat surface of said base 7 abutting each of the upper and lower sides of the annular body 6', and the lower part 4 of said stud;
Extends at different angles from 90° to.

The angle employed in the illustrated embodiment is approximately
It is 45°. The holes in the annular body 6' are arranged at corresponding slopes with respect to the upper and lower sides of the annular body 6'. By arranging the connecting handle 5' in such an inclined state, a load concentric with the axis of the straight truncated conical stud 3' is applied to the connecting handle 5'. Even when applied, said stud performs a bending action due to the compressive deformation capacity of the annular body 6', thus allowing the lower part 4 of said stud to move relative to the outsole 2. Become. This embodiment therefore provides that the material of the outsole has a very high resistance to abrasion and, in particular, an exclusively bendable elasticity, but can hardly be deformed by compressive forces. Particularly suitable for cases where: The effect of the inclined position of the connecting handle 5' is that the stud 3' has a strong tendency to deflect in one direction. In order to prevent the deflection of the entire shoe or boot, in that case it is desirable that the orientation of the connecting handle 5' be different for each stud 3' on the outsole, so that all the studs 3' lateral deflection movement is compensated.

In the illustrated embodiment, the annular body 6 is shown in the form of a disc with parallel planes. However, it may also adopt another shape, for example, its upper and lower sides may have a concave container shape or a conical surface. As a result, the annular body 6 or 6' has a more pronounced elastic flexibility in its outer region. This is because the thickness at that position is greater.

It is also in principle possible, in particular in the embodiment shown in FIG. possible. In the case of the embodiment shown in FIG.
A book connecting handle 5' may be provided, the two connecting handles 5' intersecting each other, ie extending in opposite angular directions.

Due to the desired elastic flexibility of the stud, variations can also be made to the elastic annular body with regard to its height or thickness. For example, if it is desired to reduce the elastic flexibility of the stud, it is advantageous for the thickness of the annular body 6 to be only one third or one quarter of the height of the stud. It is. This thickness differs from the thickness of the annulus adopted in the illustrated embodiment, which corresponds to approximately half the height of the stud. Also, the third
In the case of the embodiment shown in the figure, the inner edge of the annular body 6', which is shown in the form of a sharp edge in the figure, is rounded to eliminate the sharp edge, similar to the embodiment shown in FIG. It is also possible to eliminate the shape, thereby avoiding stress concentration on the corresponding sharp edges of said connecting shank 5'. moreover,
In the embodiment shown in FIG. 2, its rounded form can even correspond to a circular arc with a radius corresponding to half the height of the annular body 6, insofar as it differs from the shown form. .

In many cases, it is desirable to have reinforcing ribs on the underside of uniformly studded shoes or boots, which prevent the sole from becoming excessively thick at the location of these reinforcing ribs. These inserts are formed by inserts made of harder material to avoid
They are embedded in their entirety or their upper side into the material of the sole. Such inserts are often purely a matter of taste and fashion and are constructed to improve the appearance of the sole by making it different in color from the material of the sole. It is something that Similar to the approach described above in connection with the elastic annular body,
Such insert parts are first installed in the forming tool during molding of the shoe or boot sole, and then the sole material is molded around these insert parts. In such a case, and if reinforcing ribs are deliberately provided, the stud will sit on the insert part, so that in that case the base 7, which can be seen in the illustrated embodiment, and, during the manufacture of the sole, the annular body and the insert part must be placed in the appropriate position within the forming tool.

[Brief explanation of the drawing]

FIG. 1 is a side view of a studded football boot according to the present invention. Figure 2 shows the first
FIG. 3 is an enlarged cross-sectional view taken along the - line in the figure. FIG. 3 is a sectional view similar to FIG. 2 showing a modified embodiment of the stud. 2... Outsole, 3... Stud, 4... Lower part, 5... Handle, 6... Annular body.

Claims (1)

[Scope of Claims] 1. An outsole made of an elastically flexible material, and a plurality of rivets protruding from the stepping side of the outsole, each of which has a lower part having a ground-engaging surface. and connect this lower part to the stepping side,
and a handle having a transverse dimension, and an annular body having a predetermined outer diameter, the annular body being elastically deformable by pressure, and an intervening body between the stepping side and the lower part. the handle extends through the annular body, the lower part and the handle are integrally formed with the outsole, and the transverse dimension of the handle within the annular body is equal to the outer side of the annular body. Sports shoes characterized by a fractional value less than half the diameter. 2. Sports shoes according to claim 1, characterized in that the material of the outsole and the material of the annular body can be connected to each other by welding. 3. Sports shoes according to claim 1, wherein the handle is disposed coaxially with the stud. 4. Sports shoes according to claim 1, wherein the handle portion extends in an inclined state with respect to the stud. 5. Sports shoes according to claim 1 or 3, wherein the handle between the stepping side and the annular body is enlarged so as to form an upper part of the stud.