JPH0476715B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for manufacturing golf clubs that allows for easy weight adjustment when assembling and connecting a shaft and head, and that allows the weight to be reliably held within the shaft. The present invention relates to a golf club equipped with a member for use in the golf club.

(Prior Art) Golf clubs come in a wide variety of shapes depending on the length and type of shaft, the loft angle and lie angle of the head, and the weight.

A set is created by selecting some of these many types of clubs, and even though the clubs in the set have different lengths and weights, when you swing them, they are all the same. Being able to get a feel for the choreography is important when putting together a set. Therefore, in order to obtain the same swing feel, if you adopt the method of making the swing weight the same for all the clubs being set, you can attach a shaft of the same rigidity to the head of the weight set in advance to achieve the desired swing weight. This is done by attaching a shaft of the length corresponding to the club number.

Therefore, in order to manufacture a club whose swing weight is as designed, it is necessary to bring the weight of the club head close to the weight of the head set for the swing weight.

In order to make the club head within a predetermined weight range, iron heads can be easily manufactured using known methods. As for the wooden head, since it is a natural product, there is a large variation in density, so in order to achieve the specified weight, it is necessary to change the material and shape of the sole plate and side metal to which it is attached, or to drill a hole in the bottom and add lead. The weight is adjusted so that the weight falls within the set range by inserting a weight that satisfies the following. In this way, the weight of the head is adjusted to the designed weight and assembled with the shaft to form a golf club, but the swing balance is determined by selecting each part from among the parts manufactured in advance for each balance design. When the heads, shafts, and grips are taken out and assembled to form a golf club, variations in the weight of each of the heads, shafts, and grips that are taken out result in variations in the total weight, resulting in some fluctuations in the swing balance.

Therefore, after final assembly, it was necessary to fine-tune the weight and balance.
As disclosed in Japanese Patent Publication No. 61-15712, this fine adjustment method involves inserting and fixing the shaft into the hosel 5 of the head, and then deforming it by the amount of the missing weight from the end of the shaft on the grip side. A known method is to drop the weight capsule 12, press it against the lowermost end of the shaft with a long rod 13, and deform it so as to follow the shape of the hosel bottom 14, thereby fixing it.

In addition, the inventors of the present invention have proposed a simple and relatively accurate method for measuring weight by measuring the balance after assembling and fixing the head and shaft, and removing lead particles corresponding to the missing weight from the grip side. He also invented a method of pressing and fixing lead particles to the shaft tip by dropping them onto the tip and then inserting a plug coated with adhesive.

(Problem to be Solved by the Invention) In the former method, a deformable weight capsule for weight adjustment is dropped from the grip side of the clubshaft to the tip side of the clubshaft, and is pressed with a long stick to adjust the weight to the tip of the shaft. Since this is a method of fixing the weight capsule by following the shape of the hosel, from the grip side of the thin shaft, the weight capsule is pressed and deformed using a thin rod to follow the shape of the bottom of the hosel, so the weight capsule is fixed. There were problems such as the process was time-consuming, and since the fixed state could not be seen from the outside, it was unclear whether it was firmly fixed to the tip of the shaft or not, resulting in loose movement.

In addition, in the latter method, lead particles are dropped from the grip side to the tip, and then the plug coated with adhesive is inserted and fixed by pressing with a piston, so the plug is fixed so as to block the entire shaft diameter. However, since the adhesive condition cannot be seen from the outside, if the plug is not pressed and fixed over the lead particles so as to close the entire shaft diameter, the particles will not be able to penetrate inside the shaft while the golf club is in use. It sometimes moved and emitted the sound of metal moving.

(Means for solving the problem) Therefore, in view of these conventional drawbacks, the present invention has the following features:
It is an object of the present invention to provide a golf club whose weight is adjusted using a weight adjusting member that can be easily and reliably held when the head and shaft are assembled and connected. Built-in weight for weight adjustment inside the outer shell,
Further, a locking portion that can be locked to the tip of the shaft is formed at one end in the length direction to integrally form a weight adjustment member, and when the weight adjustment member is connected to the shaft and the head, This golf club is characterized in that it is inserted into the tip of the narrow diameter portion of the shaft, and the locking portion is locked and fixed to the tip of the shaft. The weights built into the weight adjustment member are pre-measured to various weights deemed necessary, so when adjusting the weight, temporarily assemble the shaft to the completed head and measure the balance. It is sufficient to select a weight adjustment member corresponding to the insufficient weight and insert and fix it to the tip of the narrow diameter portion of the shaft.

(Example) Examples of the present invention will be described below based on the drawings. FIGS. 1 to 6 show examples of the present invention, and FIG. 1 is a perspective view of an example of a weight adjustment member. Second
The figure is an explanatory diagram showing a state in which the weight adjustment member of Figure 1 is inserted and fixed into the shaft and a golf club is assembled, and Figures 3, 4, and 5 are perspective views showing several examples of the weight adjustment member. 6 are sectional views of main parts, and FIG. 7 is a sectional view of main parts showing a conventional example. The golf club of the present invention has rubber for storing weights, as shown in FIGS. A weight 3 is built into an outer shell 2 made of synthetic resin, and a locking portion 1 is provided at one longitudinal end of the shell 2 and can be locked to a shaft tip 4a.
Weight adjustment member 1 integrally formed with 0
This is a golf club whose weight is adjusted by inserting it into the shaft tip 4a as shown in FIG. 2, and the weight adjustment member 1 has its outer diameter adjusted as shown in FIGS. The locking portion 10 is formed into a circular or polygonal cross section that approximates the inner diameter of the shaft tip 4a, and is inserted from the shaft tip 4a.
It locks and secures with. In addition, as shown in FIG. 4, the weight adjustment member 1 has an outer circumferential surface 7.
One or more grooves 8 may be formed in the entire length direction, or through holes 9 may be formed in the length direction as shown in FIGS. 3 and 5.
may be provided.

(Function) According to the present invention, the weight adjustment member 1 for weight adjustment is configured such that the weight 3 built into the outer shell 2 is set to various weights, and weight adjustment members of various weights are set in advance. Since the weight adjustment member 1 can be formed in advance, after the balance measurement of the golf club, it is only necessary to select and incorporate the weight adjustment member 1 of the required weight, so that weight adjustment can be easily performed.

In order to insert and fix the weight adjustment member 1 to the shaft tip 4a, the outer diameter of the weight adjustment member 1 is approximated to the inner diameter of the shaft tip 4a to be inserted, and the weight adjustment member 1 is placed at one end in the length direction of the weight adjustment member 1. By forming the locking part 10 for locking on the shaft tip 4a, the insertion fixation is not only adhesive but also securely fixed by the locking part, so there is no fear of it coming off when using the golf club.

In addition, by forming a groove 8 along the entire length of the outer peripheral surface of the outer shell 2 and providing a through hole 9 in the length direction, the shaft 4 to which the weight adjustment member is fixed can be inserted into the hosel 5 of the head. This serves as a groove or hole for air venting when the hosel is opened, and can moderate the air resistance inside the hosel.

(Effects) The golf club of the present invention having the above configuration has the following features:
Temporarily assemble the head and shaft with the set balance, measure the temporary balance in order to adjust the swing balance, and select the missing weight from among the pre-formed weight adjustment members 1 of different weights. Attach the corresponding weight adjustment member 1 to the shaft tip 4a.
It is completed by inserting it from the top, fixing it to the tip part 4a by the locking part 10, and fixing the shaft 4 and the head together.

Therefore, after measuring the balance, instead of measuring the weight each time the weight is assembled, forming a weight of the necessary weight, and inserting and fixing it, select from among the weight adjustment members 1 of various weights formed in advance. It is sufficient to select the weight adjustment member 1 corresponding to the required weight and insert it into the shaft, and the weight can be adjusted by easily attaching and fixing the member. When the weight adjustment member 1 is attached to the shaft, the solid metal weight is not directly attached to the shaft, but instead the metal weight 3 is wrapped in an outer shell 2 made of synthetic resin or rubber. Therefore, the metal weight does not touch the shaft directly,
Since the outer shell 2 can adapt to some elastic deformation of the shaft, the rate of adhesive peeling that tends to occur with repeated use is significantly reduced.

In addition, the locking portion 10 provided at one end of the weight adjustment member 1 catches the shaft tip 4a when inserted into the shaft, and prevents the weight adjustment member from gripping due to adhesive peeling that is likely to occur when using a club. It prevents it from falling off to the side and can be fixed more securely than with adhesives alone.

Furthermore, if grooves 8 and through holes 9 are provided on the outer circumferential surface, when the shaft is inserted into the hosel 5, the air in the hosel will escape to the inside of the shaft, providing appropriate air resistance and improving work efficiency. do.

In other words, if the shaft tip 4a is not covered when inserting the shaft 4 into the hosel 5, the adhesive applied inside the hosel will be squeezed by the shaft and most of it will escape from the shaft tip into the shaft. As a result, the adhesion between the shaft and head will not be perfect.

In addition, if the shaft tip 4a is closed and inserted into the hosel, there is no escape route for the air inside the hosel, so air resistance increases, and the adhesive may not spread all over the body or accumulate at the bottom of the hosel.
Sometimes the shaft does not reach the bottom of the hosel completely, so the shaft cannot be properly fixed inside the hosel. Therefore, by forming the groove 8 or providing the through hole 9 on the outer circumferential surface of the weight adjustment member 1, the adhesive can be easily spread over the entire shaft and the adhesive properties can be improved.
Moreover, excessive amount of adhesive flows into the groove 8 and hole 9, creating an appropriate amount of air resistance that allows the shaft to be inserted accurately, improving quality and workability, and at the same time making the bond stronger. There are effects such as

[Brief explanation of the drawing]

1 to 6 are explanatory diagrams of the present invention, and FIGS. 1A and 1B are perspective views showing the built-in state of the weight of the weight adjustment member of the present invention. FIG. 2 is an explanatory diagram for assembling the golf club of the present invention. FIG. 3, FIG. 4, and FIG. 5 are perspective views of several examples of weight adjustment members. FIG. 6 is a sectional view of the main parts of the golf club of the present invention. FIG. 7 is a sectional view of main parts showing a conventional example. 1... Weight adjustment member, 2... Outer shell, 3... Weight, 4... Shaft, 4a... Shaft tip, 5
...Hosel, 7...Outer circumferential surface, 8...Groove, 9...
...through hole, 10...locking part.

Claims (1)

[Scope of Claims] 1. A weight adjusting member is integrally formed by incorporating a weight adjusting weight in an outer shell made of synthetic resin or rubber, and a locking portion is provided at one end in the length direction, A golf club characterized in that a member is inserted into the tip of a narrow diameter portion of a shaft and fixed by the locking portion. 2. The golf club according to claim 1, wherein the weight adjustment member has a circular or polygonal cross-sectional shape. 3. The golf club according to claim 1, wherein a groove is provided over the entire length of the outer circumferential surface of the weight adjustment member. 4. The golf club according to any one of claims 1 to 3, wherein a through hole is provided in the length direction of the weight adjustment member.