JP2004283543A

JP2004283543A - Golf club head

Info

Publication number: JP2004283543A
Application number: JP2003162297A
Authority: JP
Inventors: Minoru Yoneyama; 稔米山
Original assignee: Yonex KK
Current assignee: Yonex KK
Priority date: 2003-01-27
Filing date: 2003-06-06
Publication date: 2004-10-14
Anticipated expiration: 2023-06-06
Also published as: JP4243139B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club designed to have a low center of gravity capable of improving the carry by combining the high repulsive force at a face surface with the repulsive force of reinforced fiber. <P>SOLUTION: The hollow golf club head has face surfaces 10.10a made of a high repulsive lightweight metal on its front section. Part of the golf club head extending from a crown section 30 of the club head to a rear bent section 32 of the club head is curved and formed integrally using a fiber reinforced material 30 such as carbon fiber or the like, and the front end of the fiber reinforced material is positioned adjacent to the rear of the upper edge of the face surface. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、ヘッド本体の前面部にチタン合金などの軽量金属からなるフェース面部を設けてなる中空のゴルフクラブヘッドに関するものである。
【０００２】
【従来の技術】
従来のドライバーまたはウッド用のこの種のゴルフクラブヘッドは、ヘッド本体のフェース面部、側壁部、クラウン部及びソール部の全て軽量金属であるチタン合金からフェース面部の高反発性とクラブヘッドの軽量化を図り、ヘッド体積３００ｃｃ以上のものを形成しゴルフボールの飛距離を伸ばすための改良がなされている。
【０００３】
また、ゴルフボールの飛距離を伸ばすためには、ボールの打ち出し角を高くした低重心構造が望まれている。このような低重心構造とするために、特開平５−３１７４６５公報に示されたように、クラウン部の中央部の大半をほぼ円形に打ち抜いた孔を形成し、この孔に相当するメタル材料の重量をソール部周辺部に配置したゴルフクラブヘッドが提案されている。そして、上記の孔はその中空のまま、あるいは透明な軽量樹脂等のプレートで塞がれている。
【０００４】
【発明が解決しようとする課題】
しかしながら、この従来のゴルフクラブヘッドでは、クラウン部の中央に円形に打ち抜いたような孔が形成されているだけ、或いはその孔が透明な軽量樹脂などのプレートで塞がれているだけであるから、その孔はクラブヘッドの低重心化に寄与することはできるが、フェース面部の反発力を強化することはできず、飛距離の点で満足がいくものではなかった。
【０００５】
本発明は上記のような問題点に鑑み、その目的は、低重心構造を維持しながらフェース面部の反発力を高めてゴルフボールの飛距離を伸ばすことができるゴルフクラブヘッドを提供するにある。
【０００６】
【課題を解決するための手段】
上記の目的を達成するため、本発明では、前面部に高反発性の軽量金属からなるフェース面部を設けてなる中空のゴルフクラブヘッドにおいて、このクラブヘッドのクラウン部からクラブヘッドの背面部に至る部分をカーボン繊維等の繊維強化材で一体的に湾曲形成し、この繊維強化材の前端縁を該フェース面部の上端縁後方に近接配置してなるのである。
【０００７】
即ち、本発明ではゴルフクラブヘッドのクラウン部からその背面部を切り取ってその部分に高反発性を有するカーボン繊維などの繊維強化材を取り付け、この繊維強化材の前端縁を該フェース面部の上端縁後方に近接配置してなるのである。
【０００８】
このゴルフクラブヘッドによりゴルフボールを打撃すると、フェース面部がゴルフボールを中心として後方に撓むことになり、フェース面部の上方部も後方へ撓む。このとき、フェース面部の上端縁後方には繊維強化材の前端縁が近接配置されており、しかもこのカーボン繊維等の繊維強化材はクラブヘッドのクラウン部から該クラブヘッドの背面に至る部分まで湾曲形成されているから、この繊維強化材が湾曲部または背面端部を基端として湾曲し、フェース面部に反発力を及ぼすからフェース面部の反発力は繊維強化材によって増強され、ボールの飛距離を従来のゴルフクラブより伸ばすことができるのである。
【０００９】
上記の作用及び効果をより一層高めるためには繊維強化材の前端縁を前記フェース面部の上端縁と直接接合することが好ましい。
【００１０】
また、より好ましくは、フェース面部をヘッド本体とは別体のフェース面板から形成し、このフェース面板を高反発係数を有するチタン合金等から形成することである。
【００１１】
また、好ましくは、前記繊維強化材の前記クラウン部と背面部との間を鋭角に折り曲げて形成することで、これにより繊維強化材のフェース面板を介しての反発力はより一層増大する。
【００１２】
また好ましくは、前記クラブヘッドが前記フェース面版と前記繊維強化材と側壁本体部とからなり、該フェース面板は外周部が後方に向いた鍔部を有し、該側壁本体は前面部が全体的に開口し、該フェース面板の該鍔部の両測及び下面端部が前記側壁本体の前端面に溶接され、該フェース面板の該鍔部の上方後端面が前記繊維強化材の前端面に直接接合してなることである。
【００１３】
更にまた、好ましい形態としては、前記クラブヘッドが前記フェース面版と前記繊維強化材と側壁本体部とからなり、該側壁本体は前端面に該フェース面板を収容する枠状開口部を有し、該枠状開口部を画成する該側壁本体の上方横枠片の後面に該繊維強化材の前端面を接合してなることである。
【００１４】
更にまた、好ましくは、前記クラブヘッドがフェース面部と側壁本体部とソール部とを一体的に鋳造してなるヘッド本体と前記繊維強化材とからなり、該フェース面部の上方後端面が前記繊維強化材の前端面に当接し、該繊維強化材の背面ベント部が前記側壁本体部の背部側面に接合することである。
【００１５】
更に好ましくは、前記フェース面部の上端縁に透孔を穿設し、該透孔内に補強繊維を挿通し、前記繊維強化材の前端部が該補強繊維を上下から挾むようにして該補強繊維と一体化されて該フェース面部の上端縁に接合されてなることである。
【００１６】
この際、好ましくは、前記透孔を複数の透孔から形成し、該透孔内に挿通された前記補強繊維を補強繊維束とすることである。また、好ましくは、前記透孔をスリットから形成し、該スリット内に挿通された前記補強繊維を補強繊維帯片とすることである。
【００１７】
【発明の実施の形態】
以下に本発明の好適な実施例について、添付の図面を参照にして説明する。
図１乃至図６は本発明の第１の好適な実施形態に係るゴルフクラブヘッドを示している。このゴルフクラブヘッドは図１及び図２から明らかなように側壁本体部１とフェース面板１０とカーボン繊維からなる繊維強化部材３０とからなっている。
【００１８】
側壁本体部１は軽量金属であるチタン合金の鋳造または鍛造によって形成され、その前端面２は開口し、ヒール側とトー側の側壁上端部には内方へ向いたフランジ部３が形成され、ヒール側のフランジ３の前端部にはホーゼル用筒４０を挿入するための半円弧状の開口部４が形成されている。側壁本体の後壁（背面）中央部は凹状に切欠された凹状切欠部５が形成されている。側壁本体１の底部は平面ほぼ楕円形状のほぼ平坦なソール部６を形成している。
【００１９】
フェース面板１０は側壁本体とは異なる組成の高反発力を有するチタン合金から鍛造によって形成され、その外周囲全体が後方に折り曲げられて鍔部１１として形成され、この鍔部１１が側壁本体部の前端開口部の外周に溶接され一体化される。なお、この鍔部１１のヒール側の上端には半円形状の開口部１２が形成され、この開口部１２は前記側壁本体部の前面の開口部４と合わされてホーゼル筒４０を挿入するための円形の開口を形成する。
【００２０】
繊維強化部材３０は側壁本体部１の上面を覆うクラウン部３１と側壁本体１の後背面の凹状切欠部５を覆う背面ベント部３２とが一体的に形成され、クラウン部３１と背面ベント部３２との間は鋭角的に湾曲されている。この繊維強化部材３０は側壁本体部１の上端開口部及び凹状切欠部５を充分に覆うことができるように、好ましくは熱硬化成樹脂を含浸したカーボン繊維を織成したシート（プレプリグ）を複数層、好ましくは６〜８層、積層して形成される。そして、上記被覆にあたっては、この積層シートの半分をフランジ３、鍔部１１及び凹状切欠部５の内面に配設し、他の半分の積層シートをその外面に配設し、これらをヘッド本体を形成する加圧金型内で硬化することによって、側壁本体部１及びフェース面板１０と一体化される。これにより、図５に示すように、フェース面板１０の上端鍔部１１は繊維強化部材３０のクラウン部３１の前端縁に形成された凹部に嵌挿したように結合し、また側壁本体部１の凹状切欠部の端部は繊維強化部材の背面ベント部の後端部に形成された凹部に嵌挿したように結合され、これらの結合は極めて強固なものとなり、フェース面板の撓みが直接的に繊維強化部材に伝達されるようになる。なお、この嵌挿の際に被覆部に段差が形成されないように嵌合部のフェース面板１０の鍔部及び側壁本体部の各端部を切削して薄肉にすることが好ましい。
【００２１】
上記のように形成されたヘッド本体のヒール部の上端からホーゼル筒４０を挿入しその下端をソール部６の内面と溶接することによって内部を中空とした体積３００ｃｃ以上のゴルフクラブヘッドが形成される。
【００２２】
以上のような本発明のゴルフクラブヘッドにおいては、ゴルフボールを打撃したときのフェース面板１０の撓みが繊維強化部材３０のクラウン部３１及び背面ベント部３２にも伝達される。この時、クラウン部３１から背面ベント部３２の断面形状は図５に示したように鋭角に湾曲しているためこの湾曲部を介して高反発力が発生し、フェース面板の高反発力と相俟ってボールの飛距離を伸ばすことができる。
【００２３】
また、カーボン繊維の比重はチタンの比重の約１／３であるから、従来使用していたクラウン部及び側壁の一部をチタンからカーボン繊維強化部材３０に変えることによってゴルフクラブ全体を低比重設計のゴルフクラブとすることができ、ボールの打ち出し角度が高く、低スピンとなり、ボールが吹き挙がることがなく飛ぶようになる。
【００２４】
以下に本発明のゴルフクラブヘッドと従来のゴルフクラブヘッドとのゴルフロボットによるテスト結果を表１に示す。
表１において従来品１は上記実施態様のゴルフクラブにおいてクラウン部３１を取り除いたゴルフクラブヘッド、従来品２は本発明の繊維強化部材３０の代わりに側壁部全体及びクラウン部を従来のチタン合金の鍛造で形成したゴルフクラブヘッドである。
【００２５】
【表１】

【００２６】
以上の結果から、本発明品は従来品に比べてボール初速、打ち出し角が大きく、スピン量が少なくて吹き上げることがなく、飛距離もキャリーで大きく伸びた。
【００２７】
本発明は、前記実施形態以外にも種々に変更可能である。図７及び図８は本発明の第２に実施態様に係るゴルフクラブヘッドを示している。この実施態様では、ゴルフクラブヘッドの側壁本体１ａとフェース面部１０ａとソール部６とをチタン合金の鋳造によって一体的に形成し、側壁本体の後背部には前記第１の実施形態と同様に凹状切欠部５を形成している。また、ホーゼル用筒挿入口７も一体的に形成されている。そして、カーボン繊維からなる繊維強化材３０でクラウン部３１と背面ベント部３２とを形成し、前記実施態様と同様に、ゴルフクラブヘッドのクラウン部とこの側壁本体の後方の凹状切欠部５をカーボン繊維からなる繊維強化材３０で覆うように密着している。
【００２８】
この実施形態においても、ゴルフボールをフェース面部で打撃するとフェース面部が撓み、その撓みが繊維強化部材３０のクラウン部３１及び背面ベント部３２にも伝達される。この時、クラウン部３１から背面ベント部３２の断面形状は図５に示したように鋭角に湾曲しているためこの湾曲部を介して高反発力が発生し、フェース面板の高反発力と相俟ってボールの飛距離を伸ばすのは第１実施形態の場合と同様である。
【００２９】
図９及び図１０は本発明の第３の実施形態を示し、この実施形態は図１の実施形態の場合と異なって、側壁本体１の前面上部にトー側の側壁とヒール側の側壁を連結する上部横枠８がチタン合金の鋳造によって一体的に形成され、また、ホーゼル用筒挿入口７も一体的に形成されている。そして、側壁本体１の前面の開口部９にはチタン合金の鍛造からなるフェース面板１３が溶接により一体的に取り付けられている。
【００３０】
この側壁本体１の上面開口部と背面切欠凹部５を覆うように、前記実施形態の場合と同様に、クラウン部３１と背面ベント部３２を有する繊維強化部材３０が一体的に取り付けられている。
【００３１】
この実施形態の場合にも、ゴルフボールを打撃したときのフェース面板１０の撓みが側壁本体１の上部横枠８を介して繊維強化部材３０のクラウン部３１及び背面ベント部３２にも伝達される。この時、クラウン部３１から背面ベント部３２の断面形状は図５に示したように鋭角に湾曲しているためこの湾曲部を介して高反発力が発生し、フェース面板の高反発力と相俟ってボールの飛距離を伸ばすことができる。
【００３２】
図１１から図１３は本発明の第４実施形態を示し、この実施形態では第３実施形態における側壁本体１の上部横枠８に５個の透孔５０を等間隔で一列に形成し、各透孔５０内に前記繊維強化部材３０と同じ素材から形成された補強繊維束５１を挿入して図１２に示すようにＵ字形に折り曲げ、繊維強化部材３０の前端部が図１３に示すように前記上部横枠８を上下から挾み付けるように取り付けられる際に、繊維強化部材３０が前記補強繊維束５１によって上部横枠８を挾んで一体化され、繊維強化部材３０と側壁本体１との接合が強化されるのである。
【００３３】
図１４及び図１５は本発明の第５実施形態を示し、この実施形態では第４実施形態の透孔５０の代わりに側壁本体１の上部横枠８に上下に貫通するスリット５２を形成し、このスリット５２内に前記繊維強化部材３０と同じ素材から形成された補強繊維帯片５３を挿入して図１５に示すようにＵ字形に折り曲げ、繊維強化部材３０の前端部が前記上部横枠８を上下から挾み付けるように取り付けられる際に、繊維強化部材３０が前記補強繊維帯片５３によって上部横枠８を挾んで一体化される。この第５実施形態の方が第４実施形態の場合よりも補強繊維帯片５３と繊維強化部材３０との接触面積が大きくなるので、繊維強化部材３０と側壁本体１との接合が更に一層強化される。
【００３４】
尚、上記第４実施形態及び第５実施形態では透孔５０及びスリット５２を図９及び図１０に示した第３実施形態の側壁本体１に適用した場合について説明したが、本発明はこれに限られるものではなく、前記透孔５０またはスリット５２を第１実施形態のフェース面板１０の鍔部１１の上端面部、あるいは第２実施形態の側壁本体１ａの前端部の鍔部上端面に形成し、これらの透孔５０またはスリット５２を介して第４実施形態及び第５実施形態のように繊維強化部材３０とフェース面板１０或いは側壁本体１との接合を一体化させてもよい。
【００３５】
この第４実施形態及び第５実施形態のように、繊維強化部材３０とフェース面板１０或いは側壁本体１との接合が強化一体化されることにより、ゴルフボールを打撃したときのフェース面板１０または側壁本体の上端鍔部或いは上部横枠の撓みが繊維強化部材３０により確実に伝達され、本発明の優れた効果をより一層向上させることができる。
【００３６】
【発明の効果】
以上のように本発明のゴルフクラブヘッドではゴルフボールを打撃したときのフェース面の撓みが繊維強化部材のクラウン部及び背面ベント部にも伝達され、クラウン部と背面ベント部との湾曲部を介して高反発力が発生し、フェース面の高反発力と相俟ってボールの飛距離を伸ばすことができる。
【００３７】
また、カーボン繊維等の繊維強化材の比重はチタンの比重より小さいから、従来使用していたクラウン部及び側壁の一部を繊維強化部材に変えることによってゴルフクラブ全体を低比重設計のゴルフクラブとすることができ、ボールの打ち出し角度が高く、低スピンとなり、ボールが吹き挙がることがなく飛ぶようになる。
【図面の簡単な説明】
【図１】本発明の第１の実施形態に係るゴルフクラブヘッドを分解して示す平面図。
【図２】本発明の第１の実施形態に係るゴルフクラブヘッドを分解して示す背面図。
【図３】本発明の第１の実施形態に係るゴルフクラブヘッドの背面図。
【図４】本発明の第１の実施形態に係るゴルフクラブヘッドの正面図。
【図５】図４に示したゴルフクラブヘッドのＶ―Ｖ線断面図。
【図６】本発明の第１の実施形態に係るゴルフクラブヘッドの底面図。
【図７】本発明の第２の実施形態に係るゴルフクラブヘッドを分解して示す平面図。
【図８】本発明の第２の実施形態に係るゴルフクラブヘッドを分解して示す背面図。
【図９】本発明の第３の実施形態に係るゴルフクラブヘッドを分解して示す平面図。
【図１０】本発明の第３の実施形態に係るゴルフクラブヘッドを分解して示す背面図。
【図１１】本発明の第４の実施形態に係るゴルフクラブヘッド分解して示す平面図。
【図１２】図１１における上部横枠をＸＩＩ―ＸＩＩ線に沿って切断した断面図。
【図１３】本発明の第４の実施形態に係るゴルフクラブヘッドの断面図。
【図１４】本発明の第５の実施形態に係るゴルフクラブヘッドを分解して示す平面図。
【図１５】図１４における上部横枠をＸＶ―ＸＶに沿って切断した断面図。
【符号の説明】
１側壁本体部
５凹状切欠部
８横枠
１０フェース面板
１０ａフェース面
１１鍔部
１３フェース面板
３０繊維強化部材
３１クラウン部
３２背面ベント部
５０透孔
５１補強繊維束
５２スリット
５３補強繊維帯片[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hollow golf club head in which a face surface portion made of a lightweight metal such as a titanium alloy is provided on a front surface portion of a head body.
[0002]
[Prior art]
This type of golf club head for conventional drivers or wood is made of titanium alloy, which is a lightweight metal for the face surface, side wall, crown and sole of the head body. In order to increase the flight distance of the golf ball by forming a head volume of 300 cc or more, improvements have been made.
[0003]
In order to extend the flight distance of a golf ball, a low center of gravity structure with a high ball launch angle is desired. In order to achieve such a low center of gravity structure, as shown in Japanese Patent Laid-Open No. 5-317465, a hole is formed by punching out most of the central portion of the crown portion into a substantially circular shape, and a metal material corresponding to this hole is formed. There has been proposed a golf club head in which the weight is arranged in the periphery of the sole portion. The hole is left hollow or is covered with a transparent light resin plate or the like.
[0004]
[Problems to be solved by the invention]
However, in this conventional golf club head, a hole punched in a circle is formed in the center of the crown portion, or the hole is only blocked by a plate such as a transparent lightweight resin. Although the hole can contribute to lowering the center of gravity of the club head, the repulsive force of the face surface portion cannot be enhanced, and the flying distance is not satisfactory.
[0005]
In view of the above problems, an object of the present invention is to provide a golf club head that can increase the flight distance of a golf ball by increasing the repulsive force of a face surface portion while maintaining a low center of gravity structure.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in a hollow golf club head in which a front surface portion is provided with a face surface portion made of highly repellent lightweight metal, the crown portion of this club head extends to the back surface portion of the club head. The portion is integrally formed with a fiber reinforcing material such as carbon fiber, and the front end edge of the fiber reinforcing material is arranged close to the rear of the upper end edge of the face surface portion.
[0007]
That is, in the present invention, the back portion of the golf club head is cut from the crown portion, and a fiber reinforcing material such as carbon fiber having high resilience is attached to that portion, and the front edge of the fiber reinforcing material is attached to the upper edge of the face surface portion. It is arranged close to the rear.
[0008]
When a golf ball is hit with this golf club head, the face surface portion bends backward about the golf ball, and the upper portion of the face surface portion also bends backward. At this time, the front end edge of the fiber reinforcing material is arranged close to the rear of the upper edge of the face surface portion, and the fiber reinforcing material such as carbon fiber is curved from the crown portion of the club head to the portion extending from the back surface of the club head. Since the fiber reinforcing material is formed, the fiber reinforcing material is bent with the curved portion or the back end as the base end and exerts a repulsive force on the face surface portion, so the repulsive force of the face surface portion is enhanced by the fiber reinforcing material, and the flying distance of the ball is increased. It can be extended from conventional golf clubs.
[0009]
In order to further enhance the functions and effects described above, it is preferable to directly join the front edge of the fiber reinforcing material to the upper edge of the face surface portion.
[0010]
More preferably, the face surface portion is formed from a face surface plate separate from the head body, and the face surface plate is formed from a titanium alloy or the like having a high coefficient of restitution.
[0011]
Preferably, the fiber reinforcing material is formed by bending the crown portion and the back surface portion at an acute angle, whereby the repulsive force of the fiber reinforcing material through the face face plate is further increased.
[0012]
Preferably, the club head includes the face surface plate, the fiber reinforcing material, and a side wall main body. The face surface plate has a flange portion with an outer peripheral portion facing rearward. Both face and bottom end of the flange of the face face plate are welded to the front end face of the side wall body, and the upper rear end face of the face face plate is connected to the front end face of the fiber reinforcement. It is to be joined directly.
[0013]
Furthermore, as a preferred embodiment, the club head is composed of the face surface plate, the fiber reinforcing material, and a side wall main body, and the side wall main body has a frame-like opening that accommodates the face surface plate on the front end surface. The front end surface of the fiber reinforcing material is joined to the rear surface of the upper horizontal frame piece of the side wall body that defines the frame-shaped opening.
[0014]
Still preferably, the club head comprises a head body formed by integrally casting a face surface portion, a side wall body portion and a sole portion, and the fiber reinforcing material, and an upper rear end surface of the face surface portion is the fiber reinforced material. It is in contact with the front end surface of the material, and the back vent portion of the fiber reinforced material is joined to the back side surface of the side wall main body portion.
[0015]
More preferably, a through hole is formed in an upper end edge of the face surface portion, a reinforcing fiber is inserted into the through hole, and the front end portion of the fiber reinforcing material is integrated with the reinforcing fiber so as to sandwich the reinforcing fiber from above and below. And joined to the upper edge of the face surface portion.
[0016]
In this case, preferably, the through hole is formed from a plurality of through holes, and the reinforcing fibers inserted into the through holes are used as a reinforcing fiber bundle. Preferably, the through hole is formed from a slit, and the reinforcing fiber inserted into the slit is a reinforcing fiber strip.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 6 show a golf club head according to a first preferred embodiment of the present invention. As is apparent from FIGS. 1 and 2, the golf club head includes a side wall main body 1, a face face plate 10, and a fiber reinforced member 30 made of carbon fiber.
[0018]
The side wall main body 1 is formed by casting or forging a titanium alloy which is a lightweight metal, its front end surface 2 is opened, and an inward flange portion 3 is formed at the upper end of the heel side and toe side side walls. A semicircular opening 4 for inserting the hosel tube 40 is formed at the front end of the flange 3 on the heel side. A concave notch 5 is formed in the central portion of the rear wall (back surface) of the side wall body. A bottom portion of the side wall main body 1 forms a substantially flat sole portion 6 having a substantially elliptical shape in a plane.
[0019]
The face face plate 10 is formed by forging from a titanium alloy having a high repulsive force with a composition different from that of the side wall body, and the entire outer periphery thereof is bent rearward to form a flange portion 11, which is formed on the side wall body portion. It is welded and integrated with the outer periphery of the front end opening. A semicircular opening 12 is formed at the upper end of the heel portion 11 on the heel side, and this opening 12 is combined with the opening 4 on the front surface of the side wall body to insert the hosel cylinder 40. A circular opening is formed.
[0020]
In the fiber reinforced member 30, a crown portion 31 that covers the upper surface of the side wall main body 1 and a back vent portion 32 that covers the concave notch 5 on the back and back of the side wall main body 1 are integrally formed. Is curved acutely. This fiber reinforced member 30 is preferably formed of a plurality of sheets (prepregs) woven with carbon fibers impregnated with a thermosetting resin so as to sufficiently cover the upper end opening of the side wall body 1 and the concave notch 5. Preferably, 6 to 8 layers are laminated. In covering the above, half of the laminated sheet is disposed on the inner surface of the flange 3, the flange portion 11 and the concave notch 5, and the other half of the laminated sheet is disposed on the outer surface thereof. By being cured in the pressurizing mold to be formed, the side wall main body 1 and the face face plate 10 are integrated. As a result, as shown in FIG. 5, the upper end flange portion 11 of the face face plate 10 is coupled so as to be fitted in a recess formed in the front end edge of the crown portion 31 of the fiber reinforcing member 30, and The ends of the concave cutouts are connected so as to be fitted in the recesses formed in the rear end of the back vent part of the fiber reinforced member, and these connections become extremely strong, and the face face plate is directly bent. It is transmitted to the fiber reinforced member. It should be noted that it is preferable to cut the flanges of the face face plate 10 of the fitting portion and the end portions of the side wall main body to make the wall thin so that no step is formed in the covering portion during the insertion.
[0021]
By inserting the hosel tube 40 from the upper end of the heel portion of the head body formed as described above and welding the lower end to the inner surface of the sole portion 6, a golf club head having a volume of 300 cc or more with a hollow interior is formed. .
[0022]
In the golf club head of the present invention as described above, the deflection of the face face plate 10 when the golf ball is hit is transmitted to the crown portion 31 and the back vent portion 32 of the fiber reinforced member 30. At this time, since the cross-sectional shape from the crown portion 31 to the back vent portion 32 is bent at an acute angle as shown in FIG. 5, a high repulsive force is generated through the curved portion, and the high repulsive force of the face face plate is combined. You can increase the flight distance of the ball.
[0023]
The specific gravity of the carbon fiber is about 1/3 of the specific gravity of titanium. Therefore, the golf club as a whole is designed to have a low specific gravity by changing some of the conventionally used crown and side walls from titanium to the carbon fiber reinforced member 30. The golf club has a high ball launch angle, a low spin, and the ball will fly without blowing up.
[0024]
Table 1 shows test results of golf club heads of the present invention and conventional golf club heads using golf robots.
In Table 1, the conventional product 1 is a golf club head from which the crown portion 31 has been removed from the golf club of the above embodiment, and the conventional product 2 is made of a conventional titanium alloy with the entire side wall portion and crown portion instead of the fiber reinforced member 30 of the present invention. A golf club head formed by forging.
[0025]
[Table 1]

[0026]
From the above results, the product according to the present invention had a larger initial ball velocity and launch angle than the conventional product, and the spin rate was small and the ball was not blown up.
[0027]
The present invention can be variously modified in addition to the above embodiment. 7 and 8 show a golf club head according to a second embodiment of the present invention. In this embodiment, the side wall body 1a, the face surface portion 10a, and the sole portion 6 of the golf club head are integrally formed by casting a titanium alloy, and the back portion of the side wall body has a concave shape as in the first embodiment. A notch 5 is formed. Further, the hosel tube insertion port 7 is also formed integrally. A crown portion 31 and a back vent portion 32 are formed by a fiber reinforcing material 30 made of carbon fiber. Similarly to the above embodiment, the crown portion of the golf club head and the concave notch portion 5 at the back of the side wall body are made of carbon. It is closely attached so as to be covered with a fiber reinforcing material 30 made of fiber.
[0028]
Also in this embodiment, when the golf ball is hit with the face surface portion, the face surface portion is bent, and the bending is also transmitted to the crown portion 31 and the back vent portion 32 of the fiber reinforced member 30. At this time, since the cross-sectional shape from the crown portion 31 to the back vent portion 32 is bent at an acute angle as shown in FIG. 5, a high repulsive force is generated through the curved portion, and the high repulsive force of the face face plate is combined. As in the case of the first embodiment, the flying distance of the ball is increased.
[0029]
9 and 10 show a third embodiment of the present invention, which is different from the embodiment of FIG. 1 in that a toe side wall and a heel side wall are connected to the front upper portion of the side wall body 1. The upper horizontal frame 8 is integrally formed by casting of a titanium alloy, and the hosel cylinder insertion port 7 is also integrally formed. A face face plate 13 made of forged titanium alloy is integrally attached to the opening 9 on the front surface of the side wall body 1 by welding.
[0030]
A fiber reinforced member 30 having a crown portion 31 and a back vent portion 32 is integrally attached so as to cover the top opening and the back notch recess 5 of the side wall body 1 as in the case of the above embodiment.
[0031]
Also in this embodiment, the deflection of the face face plate 10 when a golf ball is hit is transmitted to the crown portion 31 and the back vent portion 32 of the fiber reinforced member 30 via the upper horizontal frame 8 of the side wall body 1. . At this time, since the cross-sectional shape from the crown portion 31 to the back vent portion 32 is bent at an acute angle as shown in FIG. 5, a high repulsive force is generated through the curved portion, and the high repulsive force of the face face plate is combined. You can increase the flight distance of the ball.
[0032]
11 to 13 show a fourth embodiment of the present invention. In this embodiment, five through holes 50 are formed in a row at equal intervals in the upper horizontal frame 8 of the side wall body 1 in the third embodiment. A reinforcing fiber bundle 51 formed of the same material as the fiber reinforcing member 30 is inserted into the through hole 50 and bent into a U shape as shown in FIG. 12, and the front end of the fiber reinforcing member 30 is as shown in FIG. When the upper horizontal frame 8 is attached so as to be squeezed from above and below, the fiber reinforced member 30 is integrated by sandwiching the upper horizontal frame 8 with the reinforcing fiber bundle 51, and the fiber reinforced member 30 and the side wall body 1 are integrated. Bonding is strengthened.
[0033]
14 and 15 show a fifth embodiment of the present invention. In this embodiment, a slit 52 penetrating vertically is formed in the upper horizontal frame 8 of the side wall body 1 instead of the through hole 50 of the fourth embodiment. A reinforcing fiber strip 53 made of the same material as the fiber reinforced member 30 is inserted into the slit 52 and bent into a U shape as shown in FIG. 15, and the front end of the fiber reinforced member 30 is the upper horizontal frame 8. Are attached so as to be squeezed from above and below, and the fiber reinforcing member 30 is integrated by sandwiching the upper horizontal frame 8 by the reinforcing fiber strips 53. In the fifth embodiment, the contact area between the reinforcing fiber strip 53 and the fiber reinforcing member 30 is larger than in the case of the fourth embodiment, so that the bonding between the fiber reinforcing member 30 and the side wall body 1 is further strengthened. Is done.
[0034]
In the fourth embodiment and the fifth embodiment, the case where the through hole 50 and the slit 52 are applied to the side wall body 1 of the third embodiment shown in FIGS. 9 and 10 has been described. The through hole 50 or the slit 52 is not limited, and is formed on the upper end surface portion of the flange portion 11 of the face face plate 10 of the first embodiment or the upper end surface of the flange portion of the front end portion of the side wall body 1a of the second embodiment. The joining of the fiber reinforcing member 30 and the face face plate 10 or the side wall body 1 may be integrated through the through holes 50 or the slits 52 as in the fourth and fifth embodiments.
[0035]
As in the fourth and fifth embodiments, the joint between the fiber reinforcing member 30 and the face face plate 10 or the side wall body 1 is reinforced and integrated, so that the face face plate 10 or the side wall when hitting a golf ball is obtained. The bending of the upper end collar or upper horizontal frame of the main body is reliably transmitted by the fiber reinforcing member 30, and the excellent effect of the present invention can be further improved.
[0036]
【The invention's effect】
As described above, in the golf club head of the present invention, the deflection of the face surface when the golf ball is hit is transmitted to the crown portion and the back vent portion of the fiber reinforced member, and the curved portion between the crown portion and the back vent portion is transmitted. Thus, a high repulsive force is generated, and in combination with the high repulsive force of the face surface, the flight distance of the ball can be extended.
[0037]
Further, since the specific gravity of the fiber reinforcing material such as carbon fiber is smaller than the specific gravity of titanium, the entire golf club is changed to a golf club having a low specific gravity design by changing a part of the conventionally used crown portion and side wall to a fiber reinforced member. The ball launch angle is high, the spin is low, and the ball flies without blowing up.
[Brief description of the drawings]
FIG. 1 is an exploded plan view showing a golf club head according to a first embodiment of the present invention.
FIG. 2 is an exploded rear view of the golf club head according to the first embodiment of the present invention.
FIG. 3 is a rear view of the golf club head according to the first embodiment of the present invention.
FIG. 4 is a front view of the golf club head according to the first embodiment of the present invention.
5 is a cross-sectional view taken along line VV of the golf club head shown in FIG.
FIG. 6 is a bottom view of the golf club head according to the first embodiment of the present invention.
FIG. 7 is an exploded plan view showing a golf club head according to a second embodiment of the present invention.
FIG. 8 is an exploded rear view showing a golf club head according to a second embodiment of the present invention.
FIG. 9 is an exploded plan view showing a golf club head according to a third embodiment of the present invention.
FIG. 10 is an exploded rear view showing a golf club head according to a third embodiment of the present invention.
FIG. 11 is an exploded plan view showing a golf club head according to a fourth embodiment of the present invention.
12 is a cross-sectional view of the upper horizontal frame in FIG. 11 cut along the line XII-XII.
FIG. 13 is a cross-sectional view of a golf club head according to a fourth embodiment of the present invention.
FIG. 14 is an exploded plan view showing a golf club head according to a fifth embodiment of the present invention.
15 is a cross-sectional view of the upper horizontal frame in FIG. 14 cut along XV-XV.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Side wall main-body part 5 Recessed notch part 8 Horizontal frame 10 Face face board 10a Face face 11 Gutter part 13 Face face board 30 Fiber reinforcement member 31 Crown part 32 Back vent part 50 Through-hole 51 Reinforcement fiber bundle 52 Slit 53 Reinforcement fiber strip

Claims

In a hollow golf club head in which a face surface portion made of a highly repellent lightweight metal is provided on the front portion, the portion from the crown portion of the club head to the back portion of the club head is integrated with a fiber reinforcing material such as carbon fiber. A golf club head characterized in that the front end edge of the fiber reinforcing material is closely arranged behind the upper end edge of the face surface portion.

2. The golf club head according to claim 1, wherein a front end edge of the fiber reinforcement is directly joined to an upper end edge of the face surface portion.

3. The golf club head according to claim 1, wherein the face surface portion is a face surface plate separate from the head main body.

3. The golf club head according to claim 1, wherein a portion between the crown portion and the back portion of the fiber reinforcement is bent at an acute angle.

The club head is composed of the face face plate, the fiber reinforcing material, and a side wall main body, the face face plate has a collar portion whose outer peripheral portion faces rearward, and the front side of the side wall main body is entirely open. Both the measurement and lower end of the flange of the face face plate are welded to the front end face of the side wall body, and the upper rear end face of the flange of the face face plate is directly joined to the front end face of the fiber reinforcement. The golf club head according to claim 3 or 4, wherein

The club head includes the face face plate, the fiber reinforcing material, and a side wall main body. The side wall main body has a frame-like opening for receiving the face face plate on a front end surface, and defines the frame-like opening. 5. The golf club head according to claim 3, wherein a front end surface of the fiber reinforcement is joined to a rear surface of the upper horizontal frame piece of the side wall main body.

7. A golf club head according to claim 5, wherein a concave notch is formed in a back side surface of the side wall main body, and a back vent portion of the fiber reinforcing material is inserted and fixed in the concave notch.

7. A golf club head according to claim 5, wherein a sole portion is integrally formed on the bottom surface of the side wall main body portion.

The club head comprises a head body obtained by integrally casting a face surface portion, a side wall body portion, and a sole portion, and the fiber reinforcing material, and an upper rear end surface of the face surface portion is joined to a front end surface of the fiber reinforcing material. 3. The golf club head according to claim 1, wherein a back vent portion of the fiber reinforcement is joined to a back side surface of the side wall main body portion.

5. The golf club head according to claim 4, wherein the upper rear end surface of the flange portion of the face face plate is fitted and joined to the front end surface of the fiber reinforcing material.

8. The golf club head according to claim 7, wherein a rear vent portion of the fiber reinforcement is fitted and joined to the concave cutout portion of the side wall main body portion.

A through hole is formed in the upper end edge of the face surface portion, a reinforcing fiber is inserted into the through hole, and the front end portion of the fiber reinforcing material is integrated with the reinforcing fiber so as to sandwich the reinforcing fiber from above and below. 3. The golf club head according to claim 2, wherein the golf club head is joined to an upper end edge of the face surface portion.

13. The golf club head according to claim 12, wherein the through hole comprises a plurality of through holes, and the reinforcing fibers inserted into the through holes comprise a reinforcing fiber bundle.

13. The golf club head according to claim 12, wherein the through hole is formed of a slit, and the reinforcing fiber inserted into the slit is formed of a reinforcing fiber strip.