JP3102675B2 - Golf club set - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club set, and more particularly to a golf club set in which a shaft is improved so that a shot feeling can be easily sensed even in a golf club having a large number.

[0002]

2. Description of the Related Art Generally, a golf club set comprising an iron club is composed of a long iron of No. 2 to 4, a middle iron of No. 5 to 7, an iron of No. 8 to 10, and a short iron of sand wedge. The loft angle of the head increases as the count increases, and the weight of the head increases.

[0003] The long iron has a function to ensure the flight distance, and each iron count is set so that a sharp shot with sharp spin becomes possible as the iron count increases from a long iron to a middle iron and a short iron. Various improvements have been made in pursuit of the features of.

[0004]

In general, a long iron often hits a ball strongly, and the head is liable to shake due to a small head weight and a small moment of inertia when hitting a ball. Because the contact time between the ball and the head is longer than that of the short iron, the vibration at the time of hitting is transmitted to the hand and the missed shot can be grasped relatively clearly, but from the middle iron to the short iron As the ball count rises, the hitting of the ball decreases, and the head weight increases, making it difficult for the head to shake.In addition, the loft angle is large and the contact time between the ball and the head is short. It is difficult for the vibration of the arm to be transmitted to the arm.

[0005] For this reason, although it is necessary to hit the ball more accurately with the distance and directionality as a short iron, it is difficult to capture the shot feeling as compared with a long iron, so that there are many missed shots. In short irons, which require a good hitting ball, there has been almost no proposal for a technique for making it easy to capture the feeling of hitting. Japanese Patent Application Laid-Open No. 6-269522 discloses a wood club shaft in which metal fibers are arranged in the axial direction in order to secure the elasticity in the swing direction and reduce the deflection in the direction perpendicular to the swing direction. Although disclosed, such metal fibers are excellent in vibration transmission at the time of hitting a ball.

The present invention has been devised in view of the above circumstances, and focuses on the above-described metal fibers, so that a golf club having a large golf club can easily feel a shot feeling like a golf club having a small golf club. The purpose is to provide a club set.

[0007]

In order to achieve the above object, a golf club set according to the first aspect of the present invention provides a golf club set having a metal disposed along the axial direction of the shaft of the golf club as the count increases. It is characterized in that the volume of the fiber is increased.

[0008] The invention according to claim 2 is based on claim 1.
The golf club set according to claim 1, wherein the metal fibers are arranged in the axial direction of the shaft by using a prepreg sheet having metal fibers aligned in one direction. According to a third aspect of the present invention, in the golf club set according to the first or second aspect, the shaft is formed to have substantially the same thickness from a large number to a small number.

(Function) According to the invention of each claim, when the golf club hits the ball, the metal fibers disposed in the axial direction of the shaft transmit the vibration at the time of hitting to the hand.
In general, the higher the count, the less likely the ball will be hit, but as the count increases from a long iron to a short iron, the volume of metal fibers having excellent vibration transmission properties increases, so a golf club having a large count In this case, the vibration is sufficiently transmitted to the hand.

According to the second aspect of the present invention, since the metal fibers of the prepreg sheet are unidirectionally aligned and not of a woven fabric, the metal fibers of the prepreg sheet are compared with the case of using a woven prepreg sheet. Can be arranged in the shaft without distortion, so that the vibration at the time of hitting the ball is efficiently transmitted to the hand via the metal fiber. And Claim 3
According to the invention according to the above, since all the shafts are formed with substantially the same thickness, the volume of the metal fibers is increased, and the other fiber reinforced resin layer having the vibration damping effect is reduced, so that the golf club having a large number Vibration is sufficiently transmitted to the hand even in the club.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of a third iron of the golf club set according to claims 1 to 3, wherein 1 is a hollow shaft having a head 3 attached to a tip end thereof. 1 corresponds to FIGS. 1 and 2
As shown in (a), three carbon fiber reinforced resin layers 7, 9, and 11 in which carbon fibers 5 are impregnated with an epoxy resin (thermosetting resin), and stainless metal fibers 13 are impregnated with an epoxy resin. And a four-layer structure in which the metal fiber reinforced resin layer 15 is laminated. And the shaft 1
Is formed in a tapered shape that gradually increases in diameter from the front end where the head 3 is attached to the rear end where the grip 17 is mounted.

FIG. 2B is a sectional view of a shaft of a sixth iron of the golf club set according to the present embodiment.
(c) is a sectional view of a 9-iron shaft. Each of the shafts 19 and 21 has a carbon fiber reinforced resin layer 7, 9, 11 ', 11 "and a metal fiber reinforced resin similarly to the shaft 1. Although this embodiment has a four-layer structure in which the layers 15 ′ and 15 ″ are stacked, FIGS. 2A to 2C illustrate this embodiment.
As shown in FIG.
In the axial length direction, and as the iron count increases from 3 iron to 6 iron and 9 iron, the metal fiber 1
3 while increasing the volume (amount) of each shaft 1,
19, 21 are formed with substantially the same thickness.

That is, as shown in FIG. 3 (a), the shaft 1 has a mandrel 23 formed in a tapered shape.
First, prepreg sheets 25 and 27 impregnated with epoxy resin are wound a plurality of times sequentially by aligning carbon fibers 5 having a diameter of about 8 μm in the upper left direction of 45 ° and the upper right direction of 45 °. A prepreg sheet 29 impregnated with epoxy resin is wound a plurality of times by aligning the metal fibers 13 of about 10 microns in the axial direction of the core 23 (shaft 1), and further, carbon fibers 5 are further placed on the prepreg sheet 29. After the prepreg sheet 31 impregnated with the epoxy resin is wound around the sheet in a longitudinal direction, the sheet is heated under pressure to cure the epoxy resin.

Then, the prepreg sheets 25, 27, 3
The volume ratio of carbon fiber 5 to epoxy resin 1 is 6: 4,
The volume ratio between the metal fibers 13 of the prepreg sheet 31 and the epoxy resin is 5: 5, and the volume of the metal fibers 1 in the prepreg sheet 31 is 3 cc. On the other hand, the shaft 19 is, as shown in FIG.
After sequentially winding the prepreg sheets 25 and 27 around 3,
A prepreg sheet 29 ′ cut larger than the prepreg sheet 29 is wound thereon a plurality of times, and a prepreg sheet 31 ′ cut smaller than the prepreg sheet 31 is further wound thereon to form the same thickness as the shaft 1. By cutting the prepreg sheet 29 ′ larger than the prepreg sheet 29, the volume of the metal fiber 1 in the prepreg sheet 29 ′ is 6 cc.
It has become.

Then, a prepreg sheet 29 ′ cut so as to be larger than the prepreg sheet 29 is wound,
A prepreg sheet 31 ′ cut smaller than the prepreg sheet 31 is wound thereon a plurality of times to have a thickness substantially the same as that of the shaft 1. Therefore, as shown in FIGS. The thickness of the metal fiber reinforced resin layer 15 ′ of the shaft 19 is large, and the thickness of the carbon fiber reinforced resin layer 11 ′ having vibration damping properties is smaller than that of the carbon fiber reinforced resin layer 11 of the shaft 1. ing.

As shown in FIG. 3 (c), the prepreg sheets 25 and 27 are sequentially wound around the cored bar 23, and a prepreg sheet 29 "cut larger than the prepreg sheet 29 'is further formed thereon. Wound multiple times,
The prepreg sheet 31 ″ cut smaller than the prepreg sheet 31 ′ is wound thereon a plurality of times to form the same thickness as the shafts 1 and 19, thus forming the prepreg sheet 29 ″. Is cut larger than the prepreg sheet 29 ', so that the volume of the metal fiber 1 in the prepreg sheet 29' further increases to 9 cc.

The prepreg sheet 2
The prepreg sheet 29 ″ cut larger than 9 ′ is wound a plurality of times, and the prepreg sheet 31 ″ cut smaller than the prepreg sheet 31 ′ is further wound thereon to have a thickness substantially the same as that of the shaft 1. As shown in FIG. 2B and FIG. 2C, the thickness of the metal fiber reinforced resin layer 15 ″ of the shaft 21 is larger than that of the shaft 19, and the thickness of the carbon fiber reinforced resin layer 11 ″ is It is even thinner.

Although not shown, in this embodiment, the shafts of the other golf clubs constituting the golf club set also have metal fibers 13 arranged in the axial direction of each shaft.
The volume of the metal fibers 13 is sequentially increased as the iron count increases from long irons to middle irons and short irons, and the thickness of the shaft is substantially the same from large to small irons.

Since the present embodiment is configured as described above, when a ball is hit with each golf club, the metal fibers 13 arranged in the axial direction of the shafts 1, 19 and 21 transmit vibrations at the time of hitting to the hand. Will be done. In general, as the count increases, the ball is hardly hit, but as described above, in the present embodiment, as the count increases from the long iron to the short iron, the volume of the metal fiber 13 having excellent vibration transmission properties increases. As a matter of fact, all the shafts are formed with substantially the same thickness, and the outermost carbon fiber reinforced resin layers 11 'and 11 "having a vibration damping effect are sequentially reduced in thickness as the count increases. By forming the sheets 29, 29 ', and 29 "in one direction, in which the metal fibers 13 are not woven, the metal fibers 13 can be used in the shafts 1, 19, as compared with the case where a woven prepreg sheet is used. , 21 without distortion so that vibrations can be efficiently transmitted through the metal fibers 13.
According to the present embodiment, the vibration is sufficiently transmitted to the hand even in a golf club having a large number, and as a result, as in a golf club having a large number as compared with the conventional golf club, This makes it easier to catch the shot feeling, making it possible to accurately hit the ball by adjusting the distance and directionality.

FIGS. 4 (a) to 4 (c) show the first embodiment.
The manufacturing process of the shaft used for the 3rd iron, the 6th iron and the 9th iron in another embodiment of the golf club set according to claim 3 is shown, and this embodiment is the prepreg sheets 29, 29 'described above. , 29 "and the prepreg sheets 31, 31 ', 31", the prepreg sheets 25, 27 are sequentially wound around a cored bar 23 as shown in the figure, and the prepreg sheets cut to the same size are respectively wound thereon. 33, 35, and 37 are wound to form a shaft having a three-layer structure. In this embodiment, the metal fibers 13 are arranged in the axial direction of each shaft, and a long iron, a middle iron, and a short iron are arranged. As the count increased, the volume of the metal fibers 13 was gradually increased, and the thickness of the shaft was made substantially the same from large to small. And wherein the door.

That is, each prepreg sheet 33, 35, 3
7 is formed by aligning metal fibers 13 having a diameter of about 10 μm in the axial direction of the core bar 23 and impregnating them with epoxy resin, while the prepreg sheet 33 for manufacturing the third iron is made of metal fibers 13. 12 cc and the epoxy resin are 18 cc, and the volume ratio between the metal fiber 13 and the epoxy resin is 4: 6.

In contrast, the prepreg sheet 35 for producing a 6-iron has a metal fiber 13 and an epoxy resin of 15 cc each and a volume ratio of 5: 5, whereas the prepreg sheet 37 for producing a 9-iron has Metal fiber 13
18cc, epoxy resin 12cc, metal fiber 13
The volume ratio of the epoxy resin to the epoxy resin is set to 6: 4. Therefore, even in the shaft manufactured by the method shown in FIGS. 4A to 4C, similarly to the above-described embodiment, the metal fibers 13 having excellent vibration transmission properties are distorted in the axial direction of the shaft. The prepreg sheets 33, 35, and 37 have the same structure, since the volume of the metal fibers 13 increases sequentially as the iron count increases from long iron to short iron, and the thickness of all shafts is substantially the same. The amount of carbon fibers in the carbon fiber reinforced resin layer produced in the above becomes smaller as the count increases.

Therefore, according to the present embodiment, the vibration is sufficiently transmitted to the hand even in a golf club having a large number. As a result, according to the present embodiment, the golf club having a large number is also possible. However, the shot feeling can be easily grasped, and it is possible to accurately hit the ball by adjusting the distance and the directionality.
In the above embodiments, stainless steel is used for the metal fiber 13, but titanium, tungsten, or the like may be used instead of stainless steel, or aramid fiber, boron fiber, or the like may be used as a reinforcing fiber instead of carbon fiber. It is also possible to use.

[0024]

As described above, according to the present invention, the vibration at the time of hitting is sufficiently transmitted to the hand even in a golf club having a large number of golf clubs. In a golf club having a large golf club, the shot feeling can be easily grasped similarly to a golf club having a small golf club count, and it is possible to accurately hit the golf ball by adjusting the distance and the directionality.

According to the second aspect of the present invention, since the metal fibers of the prepreg sheet are unidirectionally aligned and not of a woven fabric, the metal fibers of the prepreg sheet are compared with the case of using a woven prepreg sheet. Can be arranged in the shaft without distortion, and as a result, the vibration at the time of hitting the ball can be efficiently transmitted to the hand via the metal fiber.
According to the third aspect of the present invention, since all the shafts are formed with substantially the same thickness, the amount of the metal fiber increases, and the amount of the other fiber reinforced resin layer having the vibration damping effect decreases.

Therefore, the vibration at the time of hitting is transmitted to the hand more reliably in the golf club having the larger number, and as a result, in the golf club having the larger number as compared with the first and second aspects of the present invention. Also, there is an advantage that the shot feeling can be more easily grasped.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of one embodiment of a third iron of a golf club set according to claims 1 to 3;

FIG. 2 is a sectional view of a shaft used in each of the third, sixth, and ninth iron embodiments of the golf club set according to claims 1 to 3;

FIG. 3 is a process chart showing a method for manufacturing the shaft shown in FIG. 2;

FIG. 4 is a process diagram showing a method of manufacturing a shaft used in another embodiment of the third, sixth, and ninth irons of the golf club set according to claims 1 to 3;

[Explanation of symbols]

1,19,21 shaft 5 carbon fiber 7,9,11,11 ', 11 "carbon fiber reinforced resin layer 13 metal fiber 15,15', 15" metal fiber reinforced resin layer

Claims (3)

(57) [Claims] 1. A golf club set wherein the volume of metal fibers disposed inside a shaft of a golf club is increased along the axial length direction of the shaft of the golf club as the count increases. 2. The golf according to claim 1, wherein the shaft is formed of a prepreg sheet having metal fibers aligned in one direction, and the metal fibers are arranged in the axial direction of the shaft. Club set. 3. The golf club set according to claim 1, wherein the shaft is formed with substantially the same thickness from a large number to a small number.