JP3311352B2 - Footwear studs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to attaching studs to the underside or bottom of shoes, boots and other footwear used in games, sports and other exercises to reduce or eliminate the possibility of slipping on the ground. .

A well-known example of such a stud is described in GB 2,02
No. 8,102. The stud disclosed therein includes a hardened steel pin mounted within a molded plastic body for mounting to a shoe sole (or heel). The pin includes an enlarged head that forms the ground nose of the stud. The ground nose protrudes from a contact flange (a flange that contacts the sole) on the wide sole of the plastic body. The head abuts the flange, and the stem of the pin extends upwardly from the head and passes through a hole in the body. The tail end of the stem is upset,
Thereby, the main body is clamped so as to be pressed against the head of the pin, thereby forming an assembly. Threads are formed on the outside of the body so that the studs can be mounted in complementary threaded sockets on the sole. By rotating the studs in a direction to loosen the screws, damaged or worn studs can be replaced.

Although such studs have been very successful, especially in golf shoes, studs with better abrasion resistance have become highly desirable. It is known to insert a hard insert into the nose to reduce wear on the nose of the stud. For example, UK Patent No. 1,
As described in 277,694, U.S. Pat. No. 3,766,670 and WO 92/02156, a ball of hard abrasion resistant material (eg, tungsten carbide) may be attached to the tip of the stud nose. The tip of the nose is usually the location that is most susceptible to the greatest wear effects. Another method to achieve a similar result is U.S. Pat.
No. 831 and U.S. Pat. No. 3,552,043. According to these disclosures, a cylindrical shaft (stem) made of a hard material is accommodated in a cylindrical end of a steel pin forming a stud nose.

Although both approaches to increasing the wear resistance of the stud nose are partially satisfactory, the rest of the nose still wears unduly, ultimately resulting in a hard tip insert. (The insert with a hard tip) comes loose and falls off.

As a solution to these problems, it has been proposed to make the entire nose (at least the entire portion of the nose visible in the area of the ground contact surface) made of a wear-resistant material. As described in GB 2,248,762, a non-replaceable stud (nose and body) is formed as an integral piece of ceramic material and the stud is inserted into the sole with the nose protruding from the sole of the shoe. It may be incorporated in Alternatively, the stud may be replaceable by providing a threaded stud body,
It has also been proposed to attach a short nose of ceramic material to a steel base, the base forming both the sole contact flange and the threaded spigot. In the disclosed configuration, the nose is located in a shallow recess in the base and is mounted within the recess by adhesive.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the structure of studs for shoes that are less likely to wear.

According to one aspect of the invention, a footwear stud comprises:
A stud mounting means for mounting the stud to the underside of the footwear, from which a ground nose of a hard abrasion resistant material protrudes, wherein the stud mounting means is formed from a molded plastic material. And a lower surface of the body having a thin layer of abrasion resistant material mounted overlying the lower surface.
na, lamina) is protected from contact with the ground.

A portion of the wear-resistant lamina, which may be made of steel or other suitable metal, may be provided for insertion between the nose and the body. Alternatively, the thin layer may be a loose element, and the loose thin layer may be held by being pressed against the main body by a nose.

In the interchangeable form of the stud, the stud mounting body includes an externally threaded spigot and a wide flange. The flange is positioned to engage the underside of the footwear when the spigot is mounted in the footwear socket. The lamina is provided to overlap the lower surface of the molded flange. In such a case,
The lamination is interlocked with the flange so that torque is transmitted from the lamination to the body when inserting or removing the stud from the socket,
Usually desirable. In a preferred configuration, a polygonal (eg, square) opening provided in the center of the thin layer fits into a boss provided on the lower surface of the main body so as to have a corresponding shape, but the interlocking is ensured. For this purpose, the flange (molded flange) and the thin layer perform an interlocking action at a key engaging portion adapted to be adapted to an appropriate torque transmitting tool.

As used herein, the term indicating direction is used based on the direction in which the stud is normally used, i.e., the direction in which the nose of the stud projects downward from the underside of the shoe. .

The hard wear-resistant material forming the nose can be tungsten carbide or other suitable material having high wear resistance.

According to another feature of the invention, the stud mounting means of the footwear stud allows the stud to be mounted on the underside of the footwear and the ground nose of the hard abrasion resistant material protrudes from the underside of the footwear. To The stud mounting means includes a molded plastic body, and the nose has a metal shaft protruding from the body.
It is attached to the body by p). The nose is provided with a recess to fit over the shaft.

The nose may be joined or connected to the shaft to ensure that it is held. For example, when fitting a nose made of tungsten carbide to a steel shaft,
Brazing may be used for the connection between the two.

The shaft may have a tapered (eg, frusto-conical) portion and may engage within a similarly tapered portion of the nose recess. Further, for example, the tapered angles of both tapered portions may be different from each other so as to easily form a blazed joint. In such a tapered configuration, the entrance of the nose recess is shaped such that the sides are parallel to each other when viewed in cross section (for example, a columnar shape). A portion of the parallel shaped shaft may be received so that a precise and reliable coaxial alignment of the nose occurs on the shaft.

The metal shaft may be formed by the end of a stem extending through the plastic body.
A stem may extend through the body and its upper end may be out-turned to ensure that the body and nose are attached to each other.

Hereinafter, two types of studs for golf shoes shown as examples of the present invention will be described with reference to the accompanying drawings.

 FIG. 1 is a longitudinal sectional view of a replaceable stud.

FIG. 2 is an enlarged view of a characteristic portion of the stud of FIG.

FIG. 3 shows a stud similar to that of FIG. 1 but which cannot be replaced.

1 and 2 show a golf shoe stud with an outer threaded upper portion 10. The upper portion 10 is adapted to be mounted in a socket having complementary threads provided in the sole of the golf shoe. The stud also includes a disc-shaped intermediate portion 12 forming a wide annular flange for engaging the outer surface of the sole around the socket. The stud further includes a ground nose 14 projecting downwardly from the middle portion. The upper and middle portions together form a means for mounting the stud. The stud mounting means,
Studs can be positioned and securely attached to the underside of the shoe.

A single plastic molding body 11 forms both the outer threaded spigot 16 of the upper part 10 and a relatively large diameter disc-shaped part forming the flange body 18 of the intermediate part 12. A pin member penetrates the entire length of the central hole 19 of the molding body 11, and the pin member has an enlarged head 20 at a lower end. The upper surface of the head abuts the lower surface of the intermediate portion. A steel stem 22 of the pin, extending upwardly from the head 20 through the hole 19 in the molding, has a hollow upper end 23. The upper end 23 is bent outward and spread, whereby
The molding body 11 has an outer bent portion 23 and a pin head.
It is attached like a rivet between 20 and.

The pin head 20 includes a nose forming body made of tungsten carbide shaped to form all of the outer surface of the nose. The body of the carbide fits like a hat or cap on a shaft 24 formed by the lower end of a steel stem 22 projecting below the flange body 18 from the hole 19. A suitable recess 26 is formed in the body of the carbide so that the shaft 24 can be received therein. Also, the flat, upwardly-facing annular end surface 28 of the body of the carbide, formed around the entrance to the recess 26, is a flat, opposing lower surface of the intermediate portion 12 of the stud. Abut. The body is fixed to the shaft by brazing.

As shown in FIG. 2 which is an enlarged view, the lower end of the stem protruding from the hole 19 is a short continuous portion 25 having a cylindrical shape.
Except for, it has a frusto-conical taper shape. The stem has this columnar shape over a length extending through the hole 19 to the outer end 23 which is bent outward. The recess 26 in the body of the carbide has a frusto-conical surface 27 and a cylindrical surface 29 corresponding to the shape of the stem,
These positions the main body on the shaft. However, the taper angles (the taper angle of the shaft and the taper angle of the carbide body) are slightly different from each other, so that sufficient bonding occurs at the joint during brazing. A chamfered portion 31 is formed around the entrance of the recess 26 of the carbide body. The chamfered portion 31 allows the brazing material to slightly protrude from the joint portion.

The tungsten carbide body has a nose of a hard, wear-resistant material for grounding. The stem of the steel stem projects deep into the body (approximately 36
%), While providing a very secure positioning of the carbide body and providing substantial strength to the entire projecting lower end 14 of the stud.

The intermediate section 12 also comprises a thin metallic cover element forming a lamina 30. The thin layer 30 functions as a shield that overlaps the lower surface and the edge of the plastic molding 11 to protect them. The thin layer, which can be made of a suitable steel, has a square or square central opening 32. The opening 32 is located on a square or square central boss 34 of the molding body 11. The axial length of the boss 34 is substantially equal to the thickness of the thin layer 30, but is not longer than the thickness of the thin layer 30. The thin layer portion inserted between the nose and the molding body is sandwiched between the nose end face 28 and the lower surface of the molding body during stud assembly.

A recess 36 molded on the underside of the flange body 18
Are provided. The four recesses 36 are equally spaced around the axis of the stud. Four openings 38 are formed in the thin layer 30 so as to face these. Around each opening 38 a shield is formed by a short lip 40 extending upward. Lip 40
Are positioned relative to the corresponding recesses 36 respectively. With the lip 40 engaged in the recess 36 and the lamina 30 positioned on the square or square boss 34, the lamina 30 is interlocked with the molding 11 and cannot be rotated. The four recesses 36 and their corresponding openings 38 constitute a key engaging portion. The key engagement can engage a corresponding engagement provided on a suitable tool for transmitting torque to the stud during installation and removal of the stud.

Since the ground surface of the stud is entirely provided by the nose 20 made of tungsten carbide and the thin layer 30 made of metal, the wear resistance of the stud is greatly improved. The nose attachment means is substantially inside the nose and is thus well protected, so that there is no danger of erosion due to wear leading to poor nose attachment. Similarly, by providing a thin metal layer so as to cover the plastic flange body 18, the integrity of the key engagement portion is maintained.

The non-replaceable stud shown in FIG. 3 has a very similar configuration, but with tungsten carbide nose 2
0 ′ and a thin metal layer 30 ′ that covers the molded plastic stud molding body 11 ′. In this stud, a steel stem 2
The pin member including the nose 20 'brazed to the 2' shaft 24 'is substantially identical to the pin member of the replaceable stud shown in and described hereinabove with reference to FIGS. . However, the molded body 11 '
Is of a known shape suitable for being incorporated when molding the sole or heel of a shoe to be molded. The circular body 11 'has a central portion forming a hub 41, through which the pin stem 22' extends. The circular body 11 'also includes a peripheral portion forming a ring 42, which is connected to the hub 41 at circumferentially spaced locations by a radially extending block 43. ing.

Thin metal layer 30 'made of suitable steel
Has a disk shape that covers the annular lower surface 44 of the plastic hub 41. The outer peripheral edge portion of the thin layer extends upward and serves as a flange 45 to hold the molding of the hub. When using studs, forces can occur that tend to break the molded body 11 '. By the thin layer holding the flange 45,
Strength is provided to resist this tendency.

The lamina has a circular central opening through which the pin stem 22 'extends. The inner peripheral portion of the thin layer also extends upward to become a flange 46,
A short cylindrical center tongue-and-groove portion 47 on the lower surface of the hub 41 is fitted. The diameter of the tongue-and-groove 47 and the thin inner flange 46
Are both greater than the outer diameter of the chamfered inlet portion on the nose 20 'around the stem 22'. Therefore, even if the brazing material protrudes from the chamfered entrance, the flat annular surface above the nose is thin.
It does not interfere with sitting on the opposite flat lower surface of the 30 '. In the case of the first described stud, the nose of the pin member holds the lamina in place on the molded body 11 '.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Parry, William Hugh Leicestershire, England 6.0 B.P., Globbie, Woodbank Road 1 (56) References JP-A-55-35692 (JP, A) JP-A-61-62402 (JP, A) JP-A-5-506167 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A43C 15/02 102 A43B 13/26

Claims (12)

(57) [Claims] A stud for footwear, wherein said stud is attached to a lower surface of the footwear.
2) and the stud mounting means includes a grounding nose (2
0) protruding, said stud mounting means comprising a body (11) made of a molded plastic material, the lower surface of which is mounted so as to overlap the lower surface. Stud characterized in that it is protected from contact with the ground by a thin layer of abrasive material (30). 2. A stud according to claim 1, wherein a part of said wear-resistant thin layer (30) is inserted between said nose (20) and said body (11). And stud. 3. A stud according to claim 2, wherein said lamina (30) is a loose element, said lamina being held by said nose (20) against the body (11). A stud characterized by being. 4. A stud according to claim 1, wherein said thin layer (30) is made of metal. 5. The stud according to claim 1, wherein said main body of said stud mounting means.
Has an externally threaded spigot (16) and a wide flange (1
8), wherein the flange is arranged to engage a lower surface of footwear when the spigot is mounted in a footwear socket, and wherein the lamina is formed by molding the flange. (18) A stud characterized by being provided so as to overlap a lower surface. 6. The stud according to claim 5, wherein torque is transmitted from the thin layer (30) to the body (11) when the stud is inserted into or removed from the socket. The stud, characterized in that the lamina is interlocked with the flange (18). 7. The stud according to claim 6, wherein said thin layer (30) is molded at a key engaging portion (36, 40) adapted to be adapted to a suitable torque transmitting tool. A stud interlocked with said flange (18). 8. The stud according to claim 1, wherein the nose (20) is attached to the main body (11) by a metal shaft (24) projecting from the main body (11). A stud, wherein the nose includes a recess (26) for mating with the shaft. 9. The stud according to claim 8, wherein said shaft (24) has a tapered portion, said tapered portion being similar in said recess (26) of said nose (20). A stud adapted to engage within a tapered portion (27). 10. The stud according to claim 9, wherein an inlet portion (29) of the recess (26) of the nose (20) comprises:
The shaft (24) having a shape such that its cross-sectional sides are parallel to each other, and the inlet portion having a shape such that its cross-sectional sides are parallel to each other so as to correspond to the inlet portion; To accept the part (22) of
A stud characterized in that coaxial alignment of said nose on said axis is performed accurately and reliably. 11. A stud according to claim 8, 9 or 10, wherein the metal shaft (24) is formed by the end of a stem (22) extending through the plastic body (11). A stud characterized by being made. 12. The stud according to claim 11, wherein said stem (22) extends through said body (11) and whose upper end (23) is bent outward,
A stud characterized in that said body (11) is adapted to be mounted between said upper end (23) and said nose.