JP4293531B2

JP4293531B2 - Golf club head

Info

Publication number: JP4293531B2
Application number: JP2003287371A
Authority: JP
Inventors: 晴信楠本; 隆行長尾
Original assignee: Works Co Ltd
Current assignee: Works Co Ltd
Priority date: 2003-08-06
Filing date: 2003-08-06
Publication date: 2009-07-08
Anticipated expiration: 2023-08-06
Also published as: JP2005052458A

Description

本発明は、フェアウェイウッド、ユーティリティーを含む中空ウッドヘッドのクラウン部に繊維強化樹脂製プレート部品を使用したゴルフクラブヘッドに関するものである。 The present invention relates to a golf club head using a fiber reinforced resin plate component for a crown portion of a hollow wood head including a fairway wood and a utility.

従来、旧来からのウッドヘッドに代わる中空ウッドヘッドは、ステンレスやチタン合金やアルミニウム等を主体とする金属製であった。このためクラウン部も金属製であり、その分、重心が高いといえる。これを低重心化させるために、クラウン部に繊維強化樹脂製プレート部品を使用したゴルフクラブヘッドが販売されている。また、下記特許文献１に示す公報にもそうしたゴルフクラブヘッドが開示されている。 Conventionally, hollow wood heads that replace conventional wood heads have been made of metal mainly composed of stainless steel, titanium alloy, aluminum, or the like. For this reason, the crown part is also made of metal, and it can be said that the center of gravity is high accordingly. In order to lower the center of gravity, golf club heads using a fiber reinforced resin plate part for the crown are on the market. Such a golf club head is also disclosed in a gazette shown in Patent Document 1 below.

しかし、これらの繊維強化樹脂製プレート部品を少なくともクラウン部に有するゴルフクラブヘッドの打撃試験（フェース部の打撃により、クラウン部が上に凸状態に撓むことを繰り返す）を行った結果、耐久範囲内であるべき時期に、上記部品とヘッド本体との接合部に剥離のクラックが生じることが判った。
特開２００３−１１１８７４号公報 However, as a result of performing a hit test of a golf club head having at least the crown part of these fiber reinforced resin plate parts (the crown part is repeatedly bent upward by hitting the face part), the durability range It was found that a peeling crack occurred at the joint between the component and the head body at a time when it should be within.
JP 2003-111874 A

解決しようとする課題は、繊維強化樹脂製プレート部品を少なくともクラウン部に有するゴルフクラブヘッドの耐久性、特に接合部の耐久性を向上させることである。 The problem to be solved is to improve the durability of the golf club head having at least the crown part of the fiber reinforced resin plate part, particularly the durability of the joint part.

本発明の参考例１では、中空ウッドヘッドのクラウン部に開口を設けた金属製ヘッド本体を有し、該ヘッド本体の開口周辺部には段差状の受け部を具備しており、該受け部に接着剤を介して繊維強化樹脂製プレート部品を載置接合して前記開口を塞いだゴルフクラブヘッドにおいて、プレート部品の周辺部には該プレート部品の外側面に向かって漸次薄肉厚となるか、又は段階的に薄肉厚となった領域を有しており、該プレート部品端面と前記受け部の段差端面との間に接着剤を設けていることを特徴とするゴルフクラブヘッドを提供する。
段差状とは、以下の各例からも明らかであるが、垂直壁による段差のみならず、傾斜状の段差等も含まれる。
段階的とは、周辺部以外の本体部に対して１段だけ低くなる段部を有する場合も含まれる。 In Reference Example 1 of the present invention, the hollow wood head has a metal head main body provided with an opening in the crown portion, and a stepped receiving portion is provided around the opening of the head main body. In a golf club head in which a fiber-reinforced resin plate component is placed and bonded to the plate by an adhesive to close the opening, is the thickness of the plate component gradually reduced toward the outer surface of the plate component? Alternatively, the golf club head has a region where the thickness is gradually reduced, and an adhesive is provided between the end surface of the plate part and the step end surface of the receiving portion.
The step shape is apparent from the following examples, but includes not only a step due to a vertical wall but also an inclined step.
The term “stepwise” includes a case where the main body portion other than the peripheral portion has a step portion that is lowered by one step.

参考例２では、中空ウッドヘッドのクラウン部に開口を設けた金属製ヘッド本体を有し、該ヘッド本体の開口周辺部には段差状の受け部を具備しており、該受け部に接着剤を介して繊維強化樹脂製プレート部品を載置接合して前記開口を塞いだゴルフクラブヘッドにおいて、プレート部品の端面の外側縁と前記受け部の段差端面の外側縁との間を０．３ｍｍ以上離隔させた範囲を有し、該範囲にプレート部品よりも柔軟な接着剤の層を設けていることを特徴とするゴルフクラブヘッドを提供する。
０．３ｍｍ以上の離隔は、好ましくは０．５ｍｍ以上の離隔、或いは１ｍｍ以上の離隔である。また、これらの数値は製造公差を有することができる。離隔の上限は、ヘッドのクラウン部としての役目からの強度、剛性等の観点から５ｍｍまでが好ましい。５ｍｍを越えると本体部の受け部構造が大きくなり、低重心化の妨げになる。最も好ましい範囲は、０．５〜１ｍｍである。更には、これらの離隔数値は、プレート部品のフェース部に沿ったラインと、ホーゼル部側から後方に向かうラインとに亘る範囲で、離隔による隙間面積を該両ラインの合計長さで除した平均的な意味での離隔値である。 In Reference Example 2 , the hollow wood head has a metal head main body provided with an opening in the crown portion, and a step-shaped receiving portion is provided around the opening of the head main body, and an adhesive is provided on the receiving portion. In the golf club head in which the fiber-reinforced resin plate part is placed and joined via the plug to close the opening, the gap between the outer edge of the end face of the plate part and the outer edge of the step end face of the receiving part is 0.3 mm or more Provided is a golf club head having a separated range, and a layer of an adhesive that is softer than a plate part provided in the range.
The separation of 0.3 mm or more is preferably a separation of 0.5 mm or more, or a separation of 1 mm or more. Also, these numbers can have manufacturing tolerances. The upper limit of the separation is preferably up to 5 mm from the viewpoint of strength, rigidity, etc. from the role as the crown portion of the head. If it exceeds 5 mm, the receiving part structure of the main body part becomes large, which hinders the lowering of the center of gravity. The most preferred range is 0.5-1 mm. Further, these separation values are average values obtained by dividing the gap area due to separation by the total length of both lines in the range from the line along the face part of the plate part to the line from the hosel part side toward the rear. This is a separation value in a typical sense.

参考例３では、中空ウッドヘッドのクラウン部に開口を設けた金属製ヘッド本体を有し、該ヘッド本体の開口周辺部には段差状の受け部を具備しており、該受け部に接着剤を介して繊維強化樹脂製プレート部品を載置接合して前記開口を塞いだゴルフクラブヘッドにおいて、プレート部品の輪郭が、フェース部に沿った前側ラインと、該ラインのホーゼル部に近い側においてフェース部から遠ざかる方向に向かう側方ラインとを有し、該両ラインの交差部付近において、プレート部品の端面の外側縁と前記受け部の段差端面の外側縁との間の離隔距離が、該交差部付近を除く前記何れのラインにおける距離よりも長く、これら両ラインに沿ったプレート部品端面と前記受け部の段差端面との間にプレート部品よりも柔軟な接着剤の層を設けたことを特徴とするゴルフクラブヘッドを提供する。 In Reference Example 3 , the hollow wood head has a metal head main body provided with an opening in the crown portion, and a step-shaped receiving portion is provided around the opening of the head main body, and an adhesive is provided on the receiving portion. In the golf club head in which the fiber-reinforced resin plate part is placed and joined via the opening, the opening is closed, and the outline of the plate part has a front line along the face part and a face on the side near the hosel part of the line part. A lateral line extending in a direction away from the portion, and in the vicinity of the intersection of the two lines, the separation distance between the outer edge of the end surface of the plate part and the outer edge of the step end surface of the receiving portion is the intersection. Longer than the distance in any of the lines excluding the vicinity of the part, and a layer of adhesive that is more flexible than the plate part is provided between the end face of the plate part along the two lines and the step end face of the receiving part. To provide a golf club head which is characterized the door.

本発明の請求項１では、中空ウッドヘッドのクラウン部に開口を設けた金属製ヘッド本体を有し、該ヘッド本体の開口周辺部には段差状の受け部を具備しており、該受け部に接着剤を介して繊維強化樹脂製プレート部品を載置接合して前記開口を塞いだゴルフクラブヘッドにおいて、プレート部品の縁部は、肉厚全体として、強化繊維の比率、指向方向、弾性率の内少なくとも何れかが縁部を除く本体部と異なることにより該本体部よりも撓み剛性が低いことを特徴とするゴルフクラブヘッドを提供する。 According to a first aspect of the present invention , the hollow wood head has a metal head main body provided with an opening in the crown portion, and the head main body has a stepped receiving portion in the periphery of the opening. In a golf club head in which a fiber reinforced resin plate part is placed and bonded to an adhesive to close the opening, the edge part of the plate part has a ratio of reinforcing fiber, orientation direction, elastic modulus as a whole. There is provided a golf club head characterized in that at least any one of them is different from a main body portion excluding an edge portion, so that the flexural rigidity is lower than that of the main body portion.

請求項２では、中空ウッドヘッドのクラウン部に開口を設けた金属製ヘッド本体を有し、該ヘッド本体の開口周辺部には段差状の受け部を具備しており、該受け部に接着剤を介して繊維強化樹脂製プレート部品を載置接合して前記開口を塞いだゴルフクラブヘッドにおいて、プレート部品は少なくともその縁部において、厚さ方向にプリプレグを複数層積層した構造とし、各層のヘッドの前後方向に沿った撓みの際の単位厚さ当たりの撓み剛性が、一部同じであることを許容しつつ外側層程低いことを特徴とするゴルフクラブヘッドを提供する。
単位厚さ当たりの撓み剛性を低下させるのは、強化繊維の指向方向を撓み方向に対してより大きく角度を付ける（傾斜させる）か、弾性率の小さな強化繊維とするか、強化繊維の比率を小さくするか、或いはこれらの２つ以上の組合せとする。
また、本発明は請求項１と２の形態や参考例が混在した形態でもよい。 In Claim 2 , it has the metal head main body which provided the opening in the crown part of the hollow wood head, and the opening peripheral part of this head main body is equipped with the step-shaped receiving part, and adhesive agent in this receiving part In the golf club head in which the fiber reinforced resin plate parts are placed and joined via the plug, the opening is closed, and the plate parts have a structure in which a plurality of layers of prepregs are stacked in the thickness direction at least at the edge thereof. Provided is a golf club head characterized in that the bending rigidity per unit thickness at the time of bending along the front-rear direction is lower as the outer layer is allowed to be partly the same.
Decreasing the flexural rigidity per unit thickness depends on whether the direction of the reinforcing fiber is angled (inclined) with respect to the flexing direction, or the reinforcing fiber has a low elastic modulus. Either smaller or a combination of two or more of these.
Further, the present invention may be a form in which the forms of claims 1 and 2 and reference examples are mixed.

請求項３では、前記プレート部品の端面が該プレート部品の外側面の上方向から見えるように傾斜しており、前記プレート部品よりも柔軟な接着剤の層が前記プレート部品の傾斜状端面を覆ってなる請求項１記載のゴルフクラブヘッドを提供する。 According to a third aspect of the present invention, the end surface of the plate component is inclined so that it can be seen from above the outer surface of the plate component, and a layer of adhesive softer than the plate component covers the inclined end surface of the plate component. A golf club head according to claim 1 is provided.

打撃時にクラウン部が、フェース部からバック部に至る方向に沿った撓みを生じるが、その際、プレート部品の外側程引張り力が強く作用し、プレート部品端面と受け部の段差端面との間に引張り力が作用し、夫々と接着剤の層との境界に剥離クラックが生じ得るが、本発明の参考例１では、プレート部品の周辺部には外側面に向かって漸次薄肉厚となるか、又は段階的に薄肉厚となった領域を有しているため、細くなっているプレート部品の外側部が延び易く、撓み変形による引張りに基づく応力を緩和して、上記剥離クラックを防止できる。また、プレート部品端面は傾斜状や段差状になっているため、プレート部品端面と受け部段差端面との間の接着面積が大きく、その分接着力も大きくなり、引張りに耐え易い。従って、ゴルフクラブヘッドの耐久性、特に接合部の耐久性を向上させることができる。 At the time of striking, the crown part bends in the direction from the face part to the back part. At that time, the tensile force acts more strongly on the outside of the plate part, and between the plate part end face and the step end face of the receiving part. Tensile force acts, and peeling cracks may occur at the boundary between the adhesive layer and the adhesive layer, respectively. In Reference Example 1 of the present invention, the peripheral part of the plate part gradually becomes thinner toward the outer surface, Or since it has the area | region which became thin-walled in steps, the outer part of the thin plate component is easy to extend, the stress based on the tension | tensile_strength by bending deformation can be relieve | moderated, and the said peeling crack can be prevented. In addition, since the end face of the plate part is inclined or stepped, the bonding area between the end face of the plate part and the stepped end face of the receiving part is large, and the adhesive force is increased accordingly, and it is easy to withstand the tension. Therefore, the durability of the golf club head, particularly the durability of the joint can be improved.

参考例２では、プレート部品の端面の外側縁と受け部の段差端面の外側縁との間を０．３ｍｍ以上離隔させた範囲にプレート部品よりも柔軟な接着剤の層を設けているため、打撃によって部品とヘッド本体との接合部に生じる応力を緩和でき、ここに剥離のクラックが生じることを防止できる。従って、ゴルフクラブヘッドの耐久性、特に接合部の耐久性を向上させることができる。 In Reference Example 2 , since a layer of adhesive that is more flexible than the plate component is provided in a range in which the outer edge of the end surface of the plate component and the outer edge of the stepped end surface of the receiving portion are separated by 0.3 mm or more, The stress generated at the joint between the component and the head main body by the impact can be relieved, and the occurrence of peeling cracks can be prevented. Therefore, the durability of the golf club head, particularly the durability of the joint can be improved.

打撃によるクラウン部プレート部品の接合部の剥離クラックの問題では、特に参考例３にいう前側ラインと側方ラインとの交差部付近においてクラックが発生し易いという事実がある。参考例３では、この交差点付近のプレート部品の端面の外側縁と受け部の段差端面の外側縁との離隔距離が、ラインの他の領域における距離よりも長く、これらの間にプレート部品よりも柔軟な接着剤の層を設けているため、他の領域に比べて交差点付近の打撃時の応力がより緩和され、ここに剥離のクラックが生じることを防止できる。従って、ゴルフクラブヘッドの耐久性、特に接合部の耐久性を向上させることができる。 In the problem of peeling cracks at the joint portion of the crown plate component due to impact, there is a fact that cracks are likely to occur particularly in the vicinity of the intersection between the front line and the side line as described in Reference Example 3 . In Reference Example 3 , the separation distance between the outer edge of the end face of the plate part near the intersection and the outer edge of the step end face of the receiving part is longer than the distance in the other area of the line, and between them is larger than the plate part. Since the flexible adhesive layer is provided, the stress at the time of hitting near the intersection is more relaxed than in other regions, and it is possible to prevent the occurrence of peeling cracks. Therefore, the durability of the golf club head, particularly the durability of the joint can be improved.

請求項１は、プレート部品の縁部は本体部と強化繊維の比率、指向方向、弾性率の内少なくとも何れかを異ならしめることにより本体部よりも撓み剛性を低くしており、これにより打撃時の引張りによる接合部応力が緩和され、ここに剥離のクラックが生じることを防止できる。従って、ゴルフクラブヘッドの耐久性、特に接合部の耐久性を向上させることができる。 In the first aspect of the present invention, the edge of the plate part has a lower bending rigidity than the main body by making at least one of the ratio of the main body and the reinforcing fiber, the directing direction, and the elastic modulus different from each other. The joint stress due to the tension is relaxed, and it is possible to prevent the occurrence of peeling cracks. Therefore, the durability of the golf club head, particularly the durability of the joint can be improved.

請求項２は、剥離クラックの入り易いプレート部品縁部の外側層程内側層よりも撓み易くし、内側層は撓み難く構成して、打撃による撓み時のプレート部品とヘッド本体との接合部の表層部に生じる応力を緩和させ，ゴルフクラブヘッドの耐久性、特に接合部の耐久性を向上させることができる。 According to the second aspect of the present invention, the outer layer of the edge of the plate part where peeling cracks easily occur is more easily bent than the inner layer, and the inner layer is configured to be less likely to be bent. It is possible to relieve the stress generated in the surface layer portion and improve the durability of the golf club head, particularly the durability of the joint portion.

請求項３では、端面が傾斜状になっており、接着剤の層がこの傾斜状端面を覆っているため、打撃により変形しても更に剥離クラックが生じ難い。 According to the third aspect of the present invention, since the end surface is inclined and the adhesive layer covers the inclined end surface, even if it is deformed by impact, a peeling crack is hardly generated.

以下、本発明を図面を用いて複数形態につき詳細に説明する。
図１は、本発明に係るゴルフクラブヘッドの分解斜視図、図２は図１の部品を組み立てた後のゴルフクラブヘッドの平面図、図３は図２の矢視線Ｃ−Ｃによる断面図（一部省略）、図４は図２の矢視線Ｄ−Ｄによる断面図、図５は図３のＥ部の拡大図である。ステンレスやチタン合金やアルミニウム等を主体とする金属製ヘッド本体１０は、正面のフェース部１０Ｆと、ヒール部１０Ｈと、トウ部１０Ｔと、バック部１０Ｂと、ソール部１０Ｓと、シャフトＳ用のホーゼル部１０ＨＳとを有している。 Hereinafter, the present invention will be described in detail with reference to the drawings.
1 is an exploded perspective view of a golf club head according to the present invention, FIG. 2 is a plan view of the golf club head after the components of FIG. 1 are assembled, and FIG. 3 is a cross-sectional view taken along line CC in FIG. 4 is a cross-sectional view taken along line DD in FIG. 2, and FIG. 5 is an enlarged view of a portion E in FIG. A metal head main body 10 mainly composed of stainless steel, titanium alloy, aluminum or the like has a front face portion 10F, a heel portion 10H, a toe portion 10T, a back portion 10B, a sole portion 10S, and a hosel for a shaft S. Part 10HS.

ホーゼル部から内部を通ってソール部にまで亘ってシャフト止着用の筒状部１０ＴＢが形成されている。クラウン部は、この例ではホーゼル部に近い領域とフェース部近くのみを残し、該残りクラウン部１０Ｃから他の範囲を一段段差状に下げて形成し、その段差部の周辺部を受け部１０Ｕとして残し、残り中央領域に開口１０Ｋを設けている。周知のソケットＳＫも設けられている。受け部の内側面（裏側面）は、多くの断面図に現れているように、外側面（表側面）の段差形状に沿って形成すると、この領域の重量を大きくしないで済み、低重心化させやすい。内側面に外側のような段差を設けず、外側のみ凹状に形成しても、受け部を薄肉に形成すれば重量を大きくしないで済む。 A cylindrical portion 10TB for fastening the shaft is formed from the hosel portion to the sole portion through the inside. In this example, the crown portion is formed by leaving only the region close to the hosel portion and the face portion, and lowering the other range from the remaining crown portion 10C to a stepped shape, and receiving the peripheral portion of the step portion as a receiving portion 10U. The opening 10K is provided in the remaining central region. A well-known socket SK is also provided. As shown in many cross-sectional views, the inner side (back side) of the receiving part is formed along the step shape of the outer side (front side), so that the weight of this area does not need to be increased, and the center of gravity is lowered. Easy to make. Even if the inner side surface is not provided with a step like the outer side and is formed in a concave shape only on the outer side, if the receiving portion is formed thin, the weight does not have to be increased.

一方、プレート部品１２は、前記受け部に載置して開口１０Ｋを塞ぐことのできる寸法形状に形成されている。これは繊維強化樹脂製プレートであり、マトリックスにエポキシ樹脂を使用し、強化繊維に炭素繊維を使用した繊維強化樹脂製である。部品１２をヘッド本体１０に接合させるには接着剤を使用する。部品１２の底面と受け部１０Ｕとの間に接着剤層１４’を介在させ、そして部品の広がり方向の端面１２Ｅの外側縁（部品の外側面側の縁）とヘッド本体の受け部の段差端面外側縁との間が、図５のΔＬの範囲であり、この両端面間に接着剤層１４を介在させる。この両接着剤層１４，１４’は同じ物でもよく、異なってもよい。但し、本願では少なくとも接着剤層１４は、部品１２よりも単位厚さ当たりの撓み剛性の低い（柔軟な）層であるように、例えば、エポキシ樹脂の接着剤を使用する。その他、アクリル樹脂やシリコン樹脂系やウレタン樹脂系等の、各種高分子系接着剤が使用可能である。フィラーを含まない接着剤等の破断伸度の大きな接着剤を使用することも効果が有る。 On the other hand, the plate component 12 is formed in a dimensional shape that can be placed on the receiving portion to close the opening 10K. This is a fiber reinforced resin plate, which is made of fiber reinforced resin using an epoxy resin as a matrix and carbon fiber as a reinforced fiber. An adhesive is used to join the component 12 to the head body 10. An adhesive layer 14 'is interposed between the bottom surface of the component 12 and the receiving portion 10U, and the outer edge of the end surface 12E in the spreading direction of the component (the edge on the outer surface side of the component) and the step end surface of the receiving portion of the head body Between the outer edges is the range of ΔL in FIG. 5, and the adhesive layer 14 is interposed between both end faces. The two adhesive layers 14, 14 'may be the same or different. However, in the present application, for example, an epoxy resin adhesive is used so that at least the adhesive layer 14 is a (flexible) layer having a lower flexural rigidity per unit thickness than the component 12. In addition, various polymer adhesives such as acrylic resin, silicon resin, and urethane resin can be used. It is also effective to use an adhesive having a high elongation at break such as an adhesive containing no filler.

プレート部品１２はフェース部１０Ｆに沿った前側ラインＬＭと、該ラインのホーゼル部側に連続し、フェース部から遠ざかるヘッド後方に向かう側方ラインＬＳとを有している。図２において斜線を施している範囲が、上記接着剤の層１４を設けている範囲である。即ち、フェース部に沿った左右方向範囲（前側ラインＬＭと段差部縁端面外側縁との間隔ΔＬ’の範囲）と、ホーゼル部側の前後方向範囲（側方ラインＬＳとヘッド本体の受け部の段差端面外側縁との間隔ΔＬの範囲）とであるが、必ずしも残りクラウン部１０Ｃとの境界全てに亘って設ける必要は無い。しかし、ホーゼル部近くに設けることは効果が高い。接着剤層１４の幅ΔＬは０．３ｍｍ以上であるが、他の好ましい範囲は既述の通りである。フェース部に沿った前側ラインＬＭと側方ラインＬＳとに亘る範囲で、離隔による隙間面積を該両ラインの合計長さで除した平均的な意味での離隔幅値である。この接着剤層１４が存在すれば、部品１２の端面１２Ｅとヘッド本体との間にクラックが発生することを防止できる。 The plate component 12 has a front line LM along the face portion 10F, and a side line LS that is continuous with the hosel portion side of the line and faces the head rearward from the face portion. In FIG. 2, the hatched area is the area where the adhesive layer 14 is provided. That is, the range in the left-right direction along the face portion (the range of the interval ΔL ′ between the front line LM and the outer edge of the step portion edge) and the front-rear direction range on the hosel portion side (the side line LS and the receiving portion of the head body). It is not always necessary to provide the entire boundary with the remaining crown portion 10C. However, providing near the hosel is highly effective. The width ΔL of the adhesive layer 14 is 0.3 mm or more, but other preferable ranges are as described above. This is a separation width value in an average sense obtained by dividing the gap area due to separation by the total length of both lines in the range extending from the front line LM and the side line LS along the face portion. If this adhesive layer 14 is present, it is possible to prevent cracks from occurring between the end surface 12E of the component 12 and the head body.

上記図２での幅ΔＬとΔＬ’はラインＬＭ，ＬＳに沿ってほぼ一定の例であるが、想像線ＬＭＳはプレート部品１２の他の輪郭形態の例示であるが、判り易く図示するために誇張して描いており、ヘッド本体の受け部の段差部端面外側縁との間隔が不均一に形成されている。即ち、前側ラインＬＭと段差部縁端面外側縁との間隔ΔＬ’と、側方ラインＬＳとヘッド本体の受け部の段差端面外側縁との間隔ΔＬとが、両ラインが交差するホーゼル部近くにおいて大きくなっている。このように構成すると、打撃時に特に問題となるホーゼル部近くの、部品とヘッド本体との境界部に生ずる剥離クラックが効果的に防止できる。 Although the widths ΔL and ΔL ′ in FIG. 2 are almost constant examples along the lines LM and LS, the imaginary line LMS is an example of another contour shape of the plate part 12. It is drawn exaggeratedly, and the gap between the receiving part of the head body and the outer edge of the step part end face is formed non-uniformly. That is, the distance ΔL ′ between the front line LM and the outer edge of the edge of the stepped portion edge and the distance ΔL between the side line LS and the outer edge of the stepped end surface of the receiving portion of the head body are close to the hosel portion where both lines intersect. It is getting bigger. If comprised in this way, the peeling crack which arises in the boundary part of a component and a head main body near the hosel part which becomes a problem especially at the time of a hit | damage can be prevented effectively.

図６は図５に代わる変形例であり、請求項３に係る例でもある。図５の場合と異なるのは、部品の端面１２Ｅを傾斜状にし、しかも、外側面（表面）側程ヘッド本体とのΔＬ方向の距離が長くなる形状にしており、接着剤層１４がここに覆い被さる形態になっていることである。よりクラックが生じ難くなる。 FIG. 6 is a modified example in place of FIG. 5, and is also an example according to claim 3 . The difference from the case of FIG. 5 is that the end surface 12E of the component is inclined, and the distance from the head body toward the outer surface (surface) side is longer in the ΔL direction, and the adhesive layer 14 is here. It is in the form of covering. Cracks are less likely to occur.

図７は本発明の参考例１の形態であり、プレート部品１２の端面が、図６と逆に、外側面に向かって漸次薄肉厚になるように傾斜状に形成されており、この傾斜状部分１２Ｓの幅ΔＳの大きさはプレート部品の肉厚以上が好ましい。また、ヘッド本体の段差部端面との間（及び受け部との間）には、接着剤の層１４’が介在している。この傾斜状部分の存在する平面視的範囲は、図２を参照して接着剤層１４の存在範囲について言及した内容と同じである。ここの特記した以外の事項は、図１〜図６を参照して説明した記述の形態例において述べたものと同様である。傾斜状部分の存在により、プレート部品の外側部が延び易く、撓み変形による引張りに基づく応力を緩和して、剥離クラックを防止できる。また、プレート部品端面は傾斜状になっているため、プレート部品端面と受け部段差端面との間の接着面積が大きく、その分接着力も大きくなり、引張りに耐え易い。従って、ゴルフクラブヘッドの耐久性、特に接合部の耐久性を向上させることができる。 FIG. 7 shows a form of Reference Example 1 of the present invention, and the end surface of the plate component 12 is formed in an inclined shape so as to gradually become thinner toward the outer surface, contrary to FIG. The width ΔS of the portion 12S is preferably equal to or greater than the thickness of the plate component. Further, an adhesive layer 14 ′ is interposed between the end surface of the step portion of the head main body (and between the receiving portion). The planar view range in which the inclined portion exists is the same as the content referred to the existing range of the adhesive layer 14 with reference to FIG. Matters other than those specifically mentioned here are the same as those described in the description example described with reference to FIGS. Due to the presence of the inclined portion, the outer portion of the plate component can be easily extended, and stress based on tension due to bending deformation can be relieved to prevent peeling cracks. In addition, since the end face of the plate part is inclined, the adhesion area between the end face of the plate part and the stepped end face of the receiving part is large, and the adhesive force is increased accordingly, so that it is easy to withstand the tension. Therefore, the durability of the golf club head, particularly the durability of the joint can be improved.

図８は図５に代わる他の形態例であると共に、図７の変形例ともいえる。図７の場合と異なるのは、周辺部１２Ｓが漸変ではなく段差状に薄く形成されていることであるが、図７の場合と同様な作用効果を奏し、その他各事項も同様である。 FIG. 8 shows another embodiment instead of FIG. 5 and can be said to be a modification of FIG. The difference from the case of FIG. 7 is that the peripheral portion 12S is not gradually changed but is thinly formed in a step shape. However, the same effect is obtained as in the case of FIG. 7, and the other items are also the same.

図９は、図１〜図５に示した形態例に関連した例であるが、図６〜図８の例にも適用できる。受け部１０Ｕの表面側段差開始位置と、受け部裏面の、開口１０Ｋから遠い側の終端位置までの範囲Δ（有限値）を設けることにより、金属製の受け部側にクラックが入ることを防止し、ヘッド本体側の強度向上を図る例である。 FIG. 9 is an example related to the embodiment shown in FIGS. 1 to 5, but can also be applied to the examples of FIGS. 6 to 8. By providing a range Δ (finite value) from the front surface side step start position of the receiving portion 10U to the end position on the back surface of the receiving portion far from the opening 10K, it is possible to prevent cracks on the metal receiving portion side. In this example, the strength of the head main body is improved.

図１０は、他のゴルフクラブのライ角とロフト角を設定値通りにしてソール部１０を水平地面に接するように載置した場合の、図３に対応する断面図であり、プレート部品１２の端部、特に、フェース部１０Ｆに近い接合部における端は、クラウン部の頂点よりも所定距離δ１だけ低い位置に設けると、接合部がクラウン部の撓みによる変形を受け難く、好ましい。δ１は３ｍｍ以上がよい。また、プレート部品１２の端部を、シャフトＳの中心軸線位置から所定距離δ２だけフェース部１０Ｆ寄りに位置させると、クラウン部の撓みによる変形を受け難く、好ましい。δ２は２ｍｍ以上がよい。 FIG. 10 is a cross-sectional view corresponding to FIG. 3 when the sole portion 10 is placed in contact with the horizontal ground with the lie angle and loft angle of other golf clubs set as set values. It is preferable that the end portion, particularly the end of the joint portion close to the face portion 10F, be provided at a position lower than the apex of the crown portion by a predetermined distance δ1 because the joint portion is not easily deformed by the bending of the crown portion. δ1 is preferably 3 mm or more. Further, it is preferable that the end portion of the plate component 12 be positioned closer to the face portion 10F by a predetermined distance δ2 from the position of the central axis of the shaft S because it is difficult to be deformed by the bending of the crown portion. δ2 is preferably 2 mm or more.

図１１も、他のゴルフクラブのライ角とロフト角を設定値通りにしてソール部１０を水平地面に接するように載置した場合の、図３に対応する断面図であり、プレート部品１２のバック部側端部位置がフェース部１０Ｆの高さ方向幅の中間位置よりも所定量δ３だけ低い位置にある。これはクラウン部の撓みによる変形を受け難く好ましい。δ３は３ｍｍ以上がよい。 FIG. 11 is also a cross-sectional view corresponding to FIG. 3 when the sole portion 10 is placed in contact with the horizontal ground with the lie angle and loft angle of other golf clubs set as set values. The back portion side end portion position is lower by a predetermined amount δ3 than the intermediate position of the face portion 10F in the height direction width. This is preferable because it is not easily deformed by the bending of the crown portion. δ3 is preferably 3 mm or more.

以下、図１２と図１３で、請求項１に係る形態例を説明する。図１２は、他のゴルフクラブヘッドの図５に相当する図であり、図３のＥ部相当の拡大図である。受け部１０Ｕの上に接着剤１４’を介して繊維強化樹脂製プレート部品１２が接合されており、この部品の縁部１２Ｐが、その他の部品領域とは異なり、小さな撓み剛性を示す。図１２の領域Ｏの拡大を図１３に示す。部品１２は５枚のプリプレグを積層して成形しているが、最外側層１２Ｅに対応するプリプレグが小さく、縁部１２Ｐは、他の４層１２Ａ，１２Ｂ，１２Ｃ，１２Ｄの縁部の層からなり、加熱加圧成形により、内側面（裏面）側から順次、層１２ＡＰ，１２ＢＰ，１２ＣＰ，１２ＤＰの４層によって構成されている。 Hereinafter, an embodiment according to claim 1 will be described with reference to FIGS. FIG. 12 is a view corresponding to FIG. 5 of another golf club head, and is an enlarged view corresponding to part E of FIG. A fiber reinforced resin plate component 12 is bonded on the receiving portion 10U via an adhesive 14 ', and an edge portion 12P of this component shows a small flexural rigidity unlike other component regions. FIG. 13 shows an enlargement of the region O in FIG. The component 12 is formed by laminating five prepregs, but the prepreg corresponding to the outermost layer 12E is small, and the edge portion 12P is formed from the edge layers of the other four layers 12A, 12B, 12C, and 12D. Thus, it is configured by four layers of layers 12AP, 12BP, 12CP, and 12DP sequentially from the inner side surface (back surface) side by heat and pressure molding.

使用した各プリプレグは均一厚さであり、縁部１２Ｐの領域には、層１２Ｅに対応するプリプレグが至っていない分、プリプレグの積層時にはそこに段差隙間があった。しかし、成形時の加圧用外型形状を周辺部の段差隙間を埋めない形状にしておき、成形時の樹脂流れにより、この縁部に多くの樹脂が流れ、縁部もその他の領域と同じ程度の肉厚となる。その結果、縁部１２Ｐでは、強化繊維の比率（密度）が小さくなり、縁部１２Ｐのみが撓み剛性が小さくなる。樹脂の比率は大きくなるが、樹脂は撓み剛性には殆ど寄与しない。 Each prepreg used had a uniform thickness. In the region of the edge portion 12P, the prepreg corresponding to the layer 12E was not reached, so that there was a step gap there when the prepreg was laminated. However, the outer mold shape for pressurization at the time of molding is made a shape that does not fill the gap in the peripheral part, and a lot of resin flows to this edge due to the resin flow at the time of molding, and the edge is about the same as other areas It becomes the wall thickness. As a result, in the edge portion 12P, the ratio (density) of the reinforcing fibers is reduced, and only the edge portion 12P is bent to reduce the rigidity. Although the ratio of the resin increases, the resin hardly contributes to the bending rigidity.

図２のＣ−Ｃ断面方向、即ち、フェース面に直交する方向を０度方向として、各層のプリプレグの例を挙げる。マトリックス樹脂はエポキシ樹脂であり、層１２Ａ，１２Ｂ，１２Ｃ，１２Ｄ（１２ＡＰ，１２ＢＰ，１２ＣＰ，１２ＤＰ）の順に、＋４５度、−４５度、−４５度、＋４５度方向に炭素繊維が引き揃えられた引き揃えシートとし、層１２Ｅは、±４５度方向の炭素繊維の織布とする。炭素繊維の弾性率は全て同じとする。織布は、その織り方から元々バランスがとれているため除外して考えるが、積層構造では、積層の中心位置に対して上下に積層する構造では、その中心に対して繊維方向が対称になるように積層すると、熱による残留応力が押えられ、強度が安定する。また、変形も防止できる。 An example of the prepreg of each layer will be described with the CC cross-sectional direction in FIG. The matrix resin is an epoxy resin, and the carbon fibers are aligned in the +45 degrees, −45 degrees, −45 degrees, and +45 degrees directions in the order of the layers 12A, 12B, 12C, and 12D (12AP, 12BP, 12CP, and 12DP). The alignment sheet is used, and the layer 12E is a carbon fiber woven fabric in the direction of ± 45 degrees. The elastic modulus of all carbon fibers is the same. The woven fabric is considered to be excluded because it is originally balanced from the weaving method. However, in the laminated structure, the fiber direction is symmetric with respect to the center in the structure in which the laminated structure is laminated vertically with respect to the center position of the laminated material. When laminated in this manner, residual stress due to heat is suppressed and the strength is stabilized. Further, deformation can be prevented.

図１４は請求項２に係る実施形態例を示し、図１２の領域Ｏに相当する拡大図である。部品１２はここでは４層からなり、内側面（裏面）側から層１２Ａ’，１２Ｂ’，１２Ｃ’，１２Ｄ’であり、縁部まで同じである。図１３の場合と同様に、マトリックス樹脂をエポキシ樹脂としたプリプレグは、この順に＋４５度、−４５度、−４５度、＋４５度方向に炭素繊維が引き揃えられた引き揃えシートとする。例えば、炭素繊維の弾性率は、層１２Ａ’，１２Ｂ’のものが３０ｔｏｎ／ｍｍ^２（２９４０００Ｎ／ｍｍ^２）、層１２Ｃ’，１２Ｄ’のものが２４ｔｏｎ／ｍｍ^２（２３５２００Ｎ／ｍｍ^２）である。 FIG. 14 shows an embodiment according to claim 2 and is an enlarged view corresponding to the region O of FIG. Here, the component 12 is composed of four layers, which are the layers 12A ′, 12B ′, 12C ′, and 12D ′ from the inner side surface (rear surface) side, and the same applies to the edges. Similarly to the case of FIG. 13, the prepreg using the matrix resin as the epoxy resin is an alignment sheet in which the carbon fibers are aligned in the +45 degrees, −45 degrees, −45 degrees, and +45 degrees directions in this order. For example, the elastic modulus of the carbon fibers, the layer 12A ', 12B' those of ^{^{30ton / mm 2 (294000N / mm}} 2), the layer 12C ', 12D' ones is a ^{24ton / mm 2 (235200N / mm} 2) .

これにより、最外側層１２Ｄ’は最内層１２Ａ’よりも撓み剛性が小さくなり、部品とヘッド本体との接合部の表層部に生じる応力を緩和させ，ゴルフクラブヘッドの耐久性、特に接合部の耐久性を向上させることができる。請求項５に係る発明では、外側ほど単位厚さあたりの撓み剛性が小さいことが好ましいが、この例のように、途中層１２Ｂ’，１２Ｃ’において、同じ剛性となってもよい。また、部品全体ではなく、縁部のみにこのような撓み剛性の変化を設けた構造としてもよい。 As a result, the outermost layer 12D ′ has a smaller flexural rigidity than the innermost layer 12A ′, relieves stress generated in the surface layer portion of the joint portion between the component and the head body, and improves the durability of the golf club head, particularly the joint portion. Durability can be improved. In the invention according to claim 5, it is preferable that the bending rigidity per unit thickness is smaller toward the outer side, but the intermediate layers 12B 'and 12C' may have the same rigidity as in this example. Moreover, it is good also as a structure which provided not only the whole components but the change of such bending rigidity only in the edge part.

以上説明した各形態例での各説明事項は、特に矛盾の無い限り、任意に組み合わせてもよい。また、問題としている接合部はプレート部品の前側ラインＬＭと側方ラインＬＳに亘る範囲で説明しているが、その他、バック部側においてヘッド本体側に段差部を設けた場合、この領域においても同様の構造が適用できる。 Each explanation item in each embodiment described above may be arbitrarily combined unless there is a particular contradiction. Moreover, although the joint part in question has been described in the range extending over the front line LM and the side line LS of the plate part, in addition, in the case where a step part is provided on the head body side on the back side, also in this region A similar structure can be applied.

本発明は、フェアウェイウッドを含む中空ウッドヘッドに適用できる。 The present invention can be applied to a hollow wood head including a fairway wood.

図１は本発明に係るゴルフクラブヘッドの分解斜視図である。FIG. 1 is an exploded perspective view of a golf club head according to the present invention. 図２は図１の部品を組み立てた後のゴルフクラブヘッドの平面図である。FIG. 2 is a plan view of the golf club head after assembling the components of FIG. 図３は図２の矢視線Ｃ−Ｃによる断面図である。3 is a cross-sectional view taken along the line CC of FIG. 図４は図２の矢視線Ｄ−Ｄによる断面図である。4 is a cross-sectional view taken along line DD in FIG. 図５は図３のＥ部の拡大図である。FIG. 5 is an enlarged view of a portion E in FIG. 図６は図５に代わる変形例である。FIG. 6 is a modified example in place of FIG. 図７は図５に代わる他の形態例である。FIG. 7 shows another embodiment instead of FIG. 図８は図５に代わる他の形態例であると共に、図７の変形例でもある。FIG. 8 shows another example in place of FIG. 5 and also a modification of FIG. 図９は図１〜図５に示した参考形態例に関連した例である。FIG. 9 shows an example related to the reference embodiment shown in FIGS. 図１０は図３に対応する他のゴルフクラブヘッドの断面図である。FIG. 10 is a cross-sectional view of another golf club head corresponding to FIG. 図１１は図３に対応する他のゴルフクラブヘッドの断面図である。FIG. 11 is a cross-sectional view of another golf club head corresponding to FIG. 図１２は図５に代わる本発明の請求項１に係る形態例の略示図である。FIG. 12 is a schematic view of an embodiment according to claim 1 of the present invention instead of FIG. 図１３は図１２の要部拡大図である。FIG. 13 is an enlarged view of a main part of FIG. 図１４は本発明の請求項２に係る形態例である。FIG. 14 shows an embodiment according to claim 2 of the present invention.

１０金属製ヘッド本体
１０Ｋ開口
１０Ｕ受け部
１２プレート部品
１２Ｓ傾斜状部、段差状部
１４接着剤層 DESCRIPTION OF SYMBOLS 10 Metal head main body 10K Opening 10U Receiving part 12 Plate part 12S Inclined part, level | step difference part 14 Adhesive layer

Claims

It has a metal head body with an opening in the crown of the hollow wood head, and has a stepped receiving part around the opening of the head body, and fiber reinforced via an adhesive in the receiving part. In a golf club head in which a resin plate component is placed and joined to close the opening,
The edge part of the plate part is characterized by having a lower flexural rigidity than the main body part because the overall thickness of the plate part is different from the main body part excluding the edge part in at least one of the ratio of reinforcing fibers, the directing direction, and the elastic modulus. And golf club head.

It has a metal head body with an opening in the crown of the hollow wood head, and has a stepped receiving part around the opening of the head body, and fiber reinforced via an adhesive in the receiving part. In a golf club head in which a resin plate component is placed and joined to close the opening,
Plate parts shall have a structure in which multiple layers of prepreg are laminated in the thickness direction at least at the edge, and the bending rigidity per unit thickness when bending along the longitudinal direction of the head of each layer is partially the same. A golf club head characterized in that the outer layer is lower while allowing

The end face of the plate part is inclined to look from above of the outer side surface of the plate part, claim 1 the layer of flexible adhesive than the plate part is covering the inclined end surface of the plate part The described golf club head.