JP4285838B2 - Metal golf club head - Google Patents

Description

【００２３】
【表２】

【００２４】
前記表１に示すように、本発明品はホーゼル部材５に凹み５ａを形成することで、ホーゼル中央部からホーゼル上端部へ曲げ硬さが滑らかに減少し、ホーゼル上端部と該部位のシャフトとの曲げ硬さの差は３倍以下となっている。そして、シャフト破損速度は６２ｍ／ｓであった。
【００２５】
一方表２に示すように、従来品はホーゼル中央部からホーゼル上端部まで同じ曲げ硬さであり、ホーゼル上端部と該部位のシャフトとの曲げ硬さの差は約５倍と大きくなっている。シャフト破損速度は５４ｍ／ｓであった。
【００２６】
これらの測定試験結果より、ボール打撃時にゴルフヘッドに衝撃力が加わると、シャフトやホーゼル部に変形歪みが生じるが、シャフトとホーゼル部で曲げ硬さが異なるために、シャフトとホーゼル部の間で大きな歪み差を生じ、この歪み差の大きな部位に応力集中し、シャフトの破損ないし折損が起きることが分かる。
【００２７】
したがって、本発明品のホーゼル部材５の凹み５ａによる曲げ硬さの滑らかな変化によって、衝撃時の応力集中が起きにくく、シャフト破損速度が５４ｍ／ｓから６２ｍ／ｓと８ｍ／ｓも増大している。
【００２８】
次に、ホーゼル部材５と金属製截頭直円錐台の接合部材７を用いた本発明品と突起付ホーゼル部材１０を用いた従来品のシャフト破損速度を測定した結果を表３と表４に示す。なお、本発明品のホーゼル部材５の素材は６ＡＬ−４Ｖチタン合金を、接合部材７の素材は１５Ｖ−３Ｃｒ−３Ｓｎ−３ＡＬチタン合金を用い、接合部材７の弾性係数が小さくなるようにしている。
【００２９】
【表３】

【００３０】
【表４】

【００３１】
前記表３、表４に示すように、従来の突起付ホーゼル部材１０は曲げ硬さが大きいためゴルフシャフト８が破損し易い。一方、本発明品はホーゼル部材５とクラウン部材３接合部からホーゼル上端部までの曲げ硬さの変化が小さく、応力集中がし難くなっている。すなわち、ホーゼル部材５と接合部材７を用いた本発明品と突起付ホーゼル部材１０を用いた従来品とを比較すると、本発明品のほうがゴルフシャフト８の破損がしにくいこと分かる。
【００３２】
なお、前記実施の形態は例示であって制限的なものではない。本発明の範囲は特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。
【００３３】
【発明の効果】
以上のように、本発明によれば、ゴルフシャフトとゴルフヘッドの連結を確実に行なうことができ、さらに、打撃時の衝撃力に十分耐えるだけでなく、ゴルフプレイ中にネック部近傍でボールを打撃したときや樹木を直接打撃したとき等のミスショットによる大きな衝撃でもシャフトの折損を防ぐことができる。
【００３４】
ホーゼル部をホーゼル部材と接合部材を組み合わせて形成するものは、従来の突起付きホーゼル部材を用いたものよりも、機械加工が容易となり量産し易く、安く作ることができる。また、接合部材の弾性係数が、ホーゼル部材よりも小さい素材を選択することで、接合部材取付け部の曲げ硬さを小さくすることができる。
【図面の簡単な説明】
【図１】本発明の一実施例の分解斜視図。
【図２】（Ａ）本発明のホーゼル部材を用いたゴルフクラブヘッドの斜視図。
（Ｂ）ホーゼル部材の接合部断面の説明図。
【図３】（Ｃ）従来のホーゼル部材を用いたゴルフクラブヘッドの斜視図。
（Ｄ）ホーゼル部材の接合部断面の説明図。
【図４】（Ｅ）本発明のホーゼル部材と接合部材を用いたゴルフクラブヘッドの斜視図。
（Ｆ）ホーゼル部材と接合部材の接合部断面の説明図。
【図５】（Ｇ）従来の突起付ホーゼル部材を用いたゴルフクラブヘッドの斜視図。
（Ｈ）突起付ホーゼル部材の接合部断面の説明図。
【符号の説明】
１ 金属製ゴルフクラブヘッド
２ フェース部材
３ クラウン部材
４ ソールおよびサイド部材
５ ホーゼル部材
５ａ 凹み
５ｂ テーパー
６ 差込穴
７ 接合部材
８ ゴルフシャフト
９ 溶接
１０ 突起付ホーゼル部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal golf club head having a hollow outer shell structure in which a face member, a crown member, a sole, a side member, and a hosel member to which a golf shaft is attached are integrally joined. Is to prevent.
[0002]
[Prior art]
Conventionally, the hosel part of a golf club head having a metal outer shell structure formed by joining a plurality of shell parts has a structure in which a pipe-shaped hosel member is welded and joined. In order to prevent breakage of the shaft, a golf club head in which various hoses are devised has been disclosed.
[0003]
For example, in Japanese Patent Application Laid-Open No. 6-327796, a neck member collar that is welded to a crown member of a golf club head and a head main body and has a collar portion integrally formed at an intermediate portion is provided on an upper surface of the crown member and an upper side of the neck member. There is disclosed a golf club head characterized by a curved surface that smoothly connects a cylindrical portion.
[0004]
Further, in Japanese Patent No. 2617894, a shaft insertion member having a protrusion-like locking portion in the middle is welded to at least the upper surface shell portion of a wood club head having a metal outer shell structure, and the inside of the shaft insertion hole is further connected. Further, a wood club head provided with a stopper for regulating the shaft insertion depth is disclosed.
[0005]
Further, in Japanese Patent No. 2628455, a head main body to which a plurality of shell portions are fixed, and a wood type golf club head in which a neck pipe is fixed to a side wall portion on the heel portion side of the main body, a top shell portion and a neck pipe A wood club head is disclosed in which a reinforcing shell is disposed between and fixed.
[0006]
[Problems to be solved by the invention]
However, since the golf club head disclosed in Japanese Patent Laid-Open No. 6-327796 has a collar portion integrally with a crown portion of the club head and an intermediate portion of the neck member welded to the head body, the rigidity and bending of the shaft are reduced. There is a drawback that the rigidity and bending hardness of the collar portion are larger than the hardness, the difference between them is large, stress concentration occurs on the shaft, and the shaft cannot be completely broken.
[0007]
Also in the wood club head of Japanese Patent No. 2617894, since the protruding engaging portion is formed in the middle portion of the shaft insertion member, the rigidity and bending hardness of the protruding portion are increased, and the rigidity of the shaft is increased. And the difference becomes large compared with bending hardness, and there exists a fault that breakage of a shaft cannot be prevented.
[0008]
Further, since the stopper for restricting the shaft insertion depth is formed inside the shaft insertion hole, the shaft is restrained in the shaft axial direction. Therefore, when an impact force is applied to the head by striking, it tries to soften the impact by elastic deformation due to bending of the shaft and neck, but due to the restraint, the amount of bending strain in the vertical direction of the shaft with respect to the shaft axis is reduced. From this point of view, the difference between the amount of distortion of the shaft and the amount of distortion of the shaft insertion portion is increased, and the shaft is liable to break.
[0009]
In addition, the wood club head of Patent No. 2628455 is provided with a reinforcing shell part thicker than the top shell part between the top shell part and the neck pipe, thereby increasing the rigidity and bending hardness of the part. There is a drawback in that the difference in deformation strain between the shaft and the neck becomes large.
[0010]
Accordingly, a main object of the present invention is to provide a golf club that minimizes the difference in distortion of the shaft portion due to impact force at the time of hitting and prevents personal injury due to shaft breakage.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a metal golf club head having a hollow outer shell structure in which a face member, a crown member, a sole, a side member, and a hosel member to which a golf shaft is attached are integrally joined. Is a pipe, has a dent in part of its outer shape, the inner shape tapers from the grip side end to the sole side, and the hosel member has a constant thickness from the tapered lower end to the lower end of the hosel member A metal golf club head is formed by joining an intermediate portion of the hosel member to at least one of the face member, crown member, sole, and side member.
[0012]
In addition, the conventional hosel member with protrusions is separated into a hosel member and a metal truncated conical frustum joining member that is shorter than the hosel member and has an insertion hole for inserting the hosel member. Can be bonded to at least one of a face member, a crown member, a sole, and a side member to form a metal golf club head.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described. As materials for the face member, crown member, sole and side member, hosel member, and joining member, iron, stainless steel, aluminum, titanium, magnesium, copper, nickel, and various alloys thereof can be used. The hosel member and the joining member may be the same material or a combination of different materials. When another material is used, a material in which the elastic coefficient of the material of the joining member is smaller than the elastic coefficient of the hosel member may be selected.
[0014]
In the manufacturing method of each member, the face member, the crown member, the sole, and the side member can be manufactured by precision casting, die casting, pressing, forging, or the like. The hosel member and the joining member can be manufactured by precision casting, metal injection, cutting, powder metallurgy, or the like.
[0015]
In the method of manufacturing the golf club head using the above-mentioned members, the face member, the crown member, the sole, and the side member are welded to each other. A hosel member tapered toward the sole side and having a constant thickness below the tapered lower end is weld-bonded to at least one of the face member, crown member, sole, and side member by welding the intermediate portion of the hosel member. Thus, a metal hollow golf club head is formed.
[0016]
When the hosel part is formed by combining the hosel member and the joining member, the hosel member is inserted and coupled into the insertion hole of the joining member, and the lower surface having the large diameter of the joining member is connected to the face member, the crown member, the sole, and the side member. Or at least one of the face member, the crown member, the sole, and the side member, and then the hosel member is attached to the joining member. It inserts in an insertion hole, and the welding part of the upper surface and lower surface of a joining member is welded partially.
[0017]
In addition, by combining the hosel member and the joining member in this way, machining is easier and cheaper than that using a conventional hosel member with a projection. Moreover, the bending hardness of a joining member attaching part can be made small by selecting the raw material whose elastic modulus of a joining member is smaller than a hosel member.
[0018]
【Example】
Hereinafter, an embodiment to which the present invention is applied and a conventional example will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an embodiment of the present invention. The metal golf club head 1 of the present invention is formed by integrally joining a face member 2 made of a titanium alloy, a crown member 3, a sole, a side member 4, and a hosel member 5 to which a golf shaft 8 is attached as shown in the figure. The hosel member 5 has a pipe shape, and has an annular recess 5a formed in the outer portion.
[0019]
2A is a perspective view of the metal golf club head 1 shown in FIG. 1, and FIG. 2B is an explanatory view of a cross section of the joint portion of the hosel member 5. As illustrated, the hosel member 5 is welded 9 to the crown member 3, the sole, and the side member 4 at the lower part of the recess 5 a. The inner shape of the hosel member 5 is tapered from the grip side end toward the sole side, and has a constant thickness from the lower end of the taper 5b to the lower end of the hosel member 5. The hosel member 5 and the golf shaft 8 are joined by bonding the contact surface from the lower end of the taper 5 b to the lower end of the hosel member 5.
[0020]
FIG. 3C is a perspective view of a metal golf club head 1 using a conventional pipe-shaped hosel member 5, and FIG. 3D is an explanatory diagram of a cross-section of the joint portion of the hosel member 5. As illustrated, an intermediate portion of the hosel member 5 is welded 9 to the crown member 3, the sole, and the side member 4, and the golf shaft 8 is bonded to the entire inner surface of the hosel member 5.
[0021]
By forming the hosel member 5 as shown in FIGS. 1 and 2, the golf shaft 8 is prevented from being broken as compared with the metal golf club head 1 using the conventional pipe-shaped hosel member 5 shown in FIG. can do. In order to see the difference in the effect, the result of measuring the speed at which the golf ball 8 was damaged by causing the golf ball to collide with the hosel part of the metal golf club head 1 is shown in Table 1 as shown in FIG. Table 2 shows the results of the conventional product shown in FIG. The golf shaft 8 uses a carbon fiber reinforced plastic shaft, and the material of each member of the metal golf club head 1 is the same.
[0022]
[Table 1]

[0023]
[Table 2]

[0024]
As shown in Table 1 above, the product of the present invention forms a recess 5a in the hosel member 5 to smoothly reduce the bending hardness from the hosel central portion to the hosel upper end portion. The difference in bending hardness is 3 times or less. The shaft breakage speed was 62 m / s.
[0025]
On the other hand, as shown in Table 2, the conventional product has the same bending hardness from the center of the hosel to the upper end of the hosel, and the difference in bending hardness between the upper end of the hosel and the shaft of the part is about five times as large. . The shaft breakage speed was 54 m / s.
[0026]
From these measurement test results, when an impact force is applied to the golf head at the time of hitting the ball, deformation distortion occurs in the shaft and hosel part, but the bending hardness differs between the shaft and hosel part. It can be seen that a large strain difference is generated, stress is concentrated at a portion where the strain difference is large, and the shaft is broken or broken.
[0027]
Therefore, due to the smooth change in bending hardness due to the recess 5a of the hosel member 5 of the present invention, stress concentration during impact is less likely to occur, and the shaft breakage speed increases from 54 m / s to 62 m / s and 8 m / s. Yes.
[0028]
Next, Table 3 and Table 4 show the results of measuring the shaft breakage speed of the present invention product using the hosel member 5 and the metal truncated conical truncated cone joint member 7 and the conventional product using the projection hosel member 10. Show. The material of the hosel member 5 of the present invention is a 6AL-4V titanium alloy, and the material of the joining member 7 is a 15V-3Cr-3Sn-3AL titanium alloy so that the elastic modulus of the joining member 7 is reduced. .
[0029]
[Table 3]

[0030]
[Table 4]

[0031]
As shown in Tables 3 and 4, since the conventional hosel member 10 with protrusions has a large bending hardness, the golf shaft 8 is easily damaged. On the other hand, the product of the present invention has a small change in bending hardness from the joint portion of the hosel member 5 and the crown member 3 to the upper end portion of the hosel, and stress concentration is difficult. That is, comparing the product of the present invention using the hosel member 5 and the joining member 7 with the conventional product using the hosel member 10 with protrusions, it can be seen that the product of the present invention is less likely to damage the golf shaft 8.
[0032]
The above embodiment is illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, and includes meanings equivalent to the terms of the claims and all modifications within the scope.
[0033]
【The invention's effect】
As described above, according to the present invention, the golf shaft and the golf head can be reliably connected to each other, and further, not only sufficiently withstand the impact force at the time of hitting, but also the ball near the neck portion during golf play. The shaft can be prevented from being broken even by a large impact caused by a miss shot such as when hitting or directly hitting a tree.
[0034]
The hosel portion formed by combining the hosel member and the joining member is easier to machine and mass-produced and can be made cheaper than those using the conventional hosel member with projections. Moreover, the bending hardness of a joining member attaching part can be made small by selecting the raw material whose elastic modulus of a joining member is smaller than a hosel member.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an embodiment of the present invention.
FIG. 2A is a perspective view of a golf club head using the hosel member of the present invention.
(B) Explanatory drawing of the junction part cross section of a hosel member.
FIG. 3C is a perspective view of a golf club head using a conventional hosel member.
(D) Explanatory drawing of the junction part cross section of a hosel member.
FIG. 4E is a perspective view of a golf club head using the hosel member and the joining member of the present invention.
(F) Explanatory drawing of the junction part cross section of a hosel member and a joining member.
FIG. 5G is a perspective view of a golf club head using a conventional hosel member with a protrusion.
(H) Explanatory drawing of the junction part cross section of the hosel member with a protrusion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Metal golf club head 2 Face member 3 Crown member 4 Sole and side member 5 Hosel member 5a Recess 5b Taper 6 Insertion hole 7 Joining member 8 Golf shaft 9 Welding 10 Protrusion hosel member

Claims (1)

Metal golf club head (1) having a hollow outer shell structure in which a face member (2), a crown member (3), a sole and side member (4), and a hosel member (5) for attaching a golf shaft (8) are integrally joined. ), The hosel member (5) has a pipe-like shape and has a recess (5a) in a part of the outer shape, and the inner shape tapers (5b) from the grip side end toward the sole side. The hosel member (5) having a constant thickness from the lower end of 5b) to the lower end of the hosel member (5) is attached to at least one of the face member (2), the crown member (3), the sole and the side member (4). , as well as formed by joining the middle portion of the hosel member (5), wherein the hosel shorter than member (5), the hosel member (5 having a insertion hole (6) for inserting a hosel member (5) The lower surface having a large diameter of the joining member (7) of the metal truncated right truncated cone made of a material smaller than the elastic modulus of the face member (2), the crown member (3), the sole and the side member (4). A metal golf club head (1) characterized by being bonded to at least one of the above .

Images