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JP3723609B2 - Golf club - Google Patents

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Publication number
JP3723609B2
JP3723609B2 JP24255795A JP24255795A JP3723609B2 JP 3723609 B2 JP3723609 B2 JP 3723609B2 JP 24255795 A JP24255795 A JP 24255795A JP 24255795 A JP24255795 A JP 24255795A JP 3723609 B2 JP3723609 B2 JP 3723609B2
Authority
JP
Japan
Prior art keywords
shaft
insertion hole
length
tip
diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP24255795A
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Japanese (ja)
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JPH0956851A (en
Inventor
利生 力石
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Sports Co Ltd
Original Assignee
Bridgestone Sports Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Sports Co Ltd filed Critical Bridgestone Sports Co Ltd
Priority to JP24255795A priority Critical patent/JP3723609B2/en
Publication of JPH0956851A publication Critical patent/JPH0956851A/en
Application granted granted Critical
Publication of JP3723609B2 publication Critical patent/JP3723609B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0001】
【発明の属する技術分野】
この発明は、ゴルフクラブに関し、特にシャフトが装着されるヘッドのホーゼル部の挿入孔に特徴のあるゴルフクラブに関する。
【0002】
【従来の技術】
従来のヘッドに設けられたホーゼル部100に加工されるシャフト挿入孔101は、その内径が上端から底部近傍まで同一径であり(図4参照)、シャフト外径より0.1mm前後大きいものであった。また、シャフトとの接着性を高めるために、シャフト挿入孔の内周面にねじ山を形成したものも知られている。
一方、最近ゴルフクラブのシャフトとしては、スチール製のものよりもカーボンやボロン等を混入した強化プラスチック製のものが多く使用されるようになり、それに伴ってネックでの折損事故も増加してきた。折損事故の原因を調べると、図5に示すように、シャフト102の装着時にシャフト102がホーゼル部100のシャフト挿入孔101の中で偏って入っているため、シャフト102の一部分がシャフト挿入孔101の入口端に接することとなり、打撃時に入口端(エッジ)にシャフト102が衝突し、ここに応力が集中することによりシャフト102が折損することが判明している。このような原因を取除くため、シャフト挿入孔の入口端のエッジ(内周縁)を面取り加工したり、シャフトが挿入孔に均等に位置するように接着剤を塗布し、かつ丁寧に装着したりする必要があった。
【0003】
【発明が解決しようとする課題】
シャフト挿入孔の入口端を面取り加工してもシャフト装着が偏っている場合には依然として折損が生じていた。また、シャフトを孔に対して偏りなく装着するには手間暇がかかり、かつ熟練を要するため、量産を図る上で問題があった。さらに、シャフト外径のバラつきもあるため、シャフト挿入孔の内径を大きめに加工しておくことが多く、そのためシャフト外径とシャフト挿入孔の内径との差が大きくなりすぎる場合が生じ、そのために使用する接着剤の量も増え、接着剤が硬化するまでの時間が長くなりシャフトを固定しておくことが難しくなる。そこで、セルロイド等の小片をシャフトとシャフト挿入孔の内壁との間に挟むなどの方策がとられるが、小片を挟むことによりシャフトを偏らせることともなり、シャフト折損の原因は依然として取除かれていない。
【0004】
そこで、この発明は、手間や熟練を必要とせず、シャフトを偏りなくシャフト挿入孔の中央に装着することができ、量産も図れ、かつ折損事故防止を図ったゴルフクラブを提供することを目的とする。
【0005】
【課題を解決するための手段】
上述の目的を達成するため、この発明は、ヘッドに設けたホーゼル部にシャフト先端が挿入される挿入孔の深さ、S (大径部の長さ)+S (挿入孔の長さ)+S (テーパー部の長さ)を28〜38mmに形成し、挿入孔の底部からmm以上上部の内径Dをシャフト先端外径より0.05〜0.5mm大きい大径部に形成し、挿入孔の長さSである先端の内径Dをシャフト先端外径よりも0.05〜0.3mm小さく形成するとともに、S を2 mm 程度とし、挿入孔の先端から大径部に至る間の長さSを内径が徐々に大きくなるテーパー部に形成し、このテーパー部の長さSを5〜8mmとし、シャフトの先端をテーパー部の先端寄りでそのテーパー部の内壁面に圧接して挿入孔の中心にシャフトを位置させ、挿入孔内周面とシャフト外周面との間で接着剤を固化させ、前記シャフトを強化プラスチック製としたものである。
【0006】
【発明の実施の形態】
以下に、この発明の好適な実施例を図面を参照にして説明する。
【0007】
図1は、ヘッドに設けたホーゼル部1の断面を示し、このホーゼル部1にシャフト先端が挿入される挿入孔2が開けられている。この挿入孔2の深さは28〜38mmに形成してある。挿入孔2の底部2Aから3〜15mmよりも上部の内径D1 をシャフト先端外径より0.05〜0.5mm大きい大径部2Bに形成してある。また、挿入孔2の先端の内径D2 をシャフト先端外径よりも0.05〜0.3mm小さく形成してある。さらに、挿入孔2の先端から大径部2Bに至る間を内径が徐々に大きくなるテーパー部2Cに形成してある。大径部2Bの長さS1 は22〜28mm程度であり、テーパー部2Cの長さS3 は5.0〜8.0mm程度であり、先端の長さS2 は2mm程度である。なお、大径部2Bの内径D1 は好ましくは0.07〜0.20mmシャフト先端外径よりも大きくする。また、挿入孔2の先端内径D2 はシャフト先端外径よりも好ましくは0.1〜0.2mm小さくする。さらに、テーパー部2Cの長さS3 は好ましくは5〜10mmである。なお、このホーゼル部1の挿入孔2の入口端は面取り加工が施してあり、面取り部2Dが形成されている。
【0008】
図2は挿入孔2にシャフト3を挿入し装着した状態を示し、符号4は接着剤を示す。シャフト3の先端はテーパー部2Cの先端寄りで挿入孔2の内壁面に圧接し、この状態でシャフト3が正しく挿入される。シャフト3の先端外径は8〜9.8mmであり、強化プラスチック製のものが使用に好適である。なお、アイアンクラブである場合にはシャフト3の先端外径は9〜9.8mmとするのが好ましい。
【0009】
図3は図2の状態における横断面を示し、シャフト3が偏りなく挿入孔2の中心に位置している状態を示す。
【0010】
次の表1にこの発明の実施例およびその比較例を示す。表1中の「測定項目」の「L」は、挿入孔2の深さを示し、S1 +S2 +S3 の総和である。
【0011】
【表1】

Figure 0003723609
【0012】
表1に示す実施例1乃至3と比較例1乃至3とのシャフト3の偏り状態と固定性および装着の容易性、さらには耐久性について比較した結果は次の表2の通りであった。
【0013】
【表2】
Figure 0003723609
【0014】
比較例1は図4に示すホーゼル部100を用いたものであり、シャフト装着に偏りが発生し、かつ接着剤を塗布し硬化させるときの固定性も悪いものであった。比較例2はテーパー状の部分が長く、結果的に内径の小さい部分が多くなり、シャフト挿入が困難となるため無理に挿入しようとするとシャフトネック部にダメージを与え耐久性を落とす原因となった。また、比較例3は挿入孔の先端の内径をシャフト外径と同等に設定した場合であり、これは装着性はよいが、シャフトの固定性が十分ではなく、その結果耐久性も実施例に比べて劣るものであった。実施例1乃至3では、シャフト挿入孔にテーパー部を配置することが重要となるが、ただテーパー部を配置すればよいというものではなく、その内径や長さが重要となる。
【0015】
【発明の効果】
以上説明したように、この発明によれば、ヘッドに設けたホーゼル部にシャフト先端が挿入される挿入孔の深さ、S (大径部の長さ)+S (挿入孔の長さ)+S (テーパー部の長さ)を28〜38mmに形成し、挿入孔の底部からmm以上上部の内径Dをシャフト先端外径より0.05〜0.5mm大きい大径部に形成し、挿入孔の長さSである先端の内径Dをシャフト先端外径よりも0.05〜0.3mm小さく形成するとともに、S を2 mm 程度とし、挿入孔の先端から大径部に至る間の長さSを内径が徐々に大きくなるテーパー部に形成し、このテーパー部の長さSを5〜8mmとし、シャフトの先端をテーパー部の先端寄りでそのテーパー部の内壁面に圧接して挿入孔の中心にシャフトを位置させ、挿入孔内周面とシャフト外周面との間で接着剤を固化させ、前記シャフトを強化プラスチック製としたので、シャフトはその外径よりも内径が小さい挿入孔の先端までは入り込めず、テーパー部の先端側で固定されることとなる。従って、この固定状態においてシャフトは挿入孔の中心に位置し、シャフト外周面と挿入孔内周面との間の接着剤が固化するまでシャフトを他の手段で固定させておく必要もなくなり、シャフト装着作業も容易となりかつ量産を図る上でも有利なものとなる。シャフトが挿入孔に正確に装着されることにより、シャフトの折損事故も防止できる。
【図面の簡単な説明】
【図1】この発明のホーゼル部の断面図。
【図2】シャフト装着時の断面図。
【図3】シャフト装着時の横断面図。
【図4】従来例を示すホーゼル部の断面図。
【図5】従来例におけるシャフトの偏り状態を示す横断面図。
【符号の説明】
1 ホーゼル部
2 挿入孔
2A 底部
2B 大径部
2C テーパー部
3 シャフト[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a golf club, and more particularly to a golf club characterized by an insertion hole in a hosel portion of a head to which a shaft is attached.
[0002]
[Prior art]
The shaft insertion hole 101 processed in the hosel portion 100 provided in the conventional head has the same inner diameter from the top to the bottom (see FIG. 4), and is about 0.1 mm larger than the shaft outer diameter. It was. Moreover, in order to improve adhesiveness with a shaft, what formed the thread on the inner peripheral surface of the shaft insertion hole is also known.
On the other hand, recently, shafts of reinforced plastics in which carbon, boron or the like is mixed are used more frequently as shafts of golf clubs, and breakage accidents at the neck have increased accordingly. When the cause of the breakage accident is examined, as shown in FIG. 5, since the shaft 102 is biased in the shaft insertion hole 101 of the hosel part 100 when the shaft 102 is mounted, a part of the shaft 102 is partly inserted into the shaft insertion hole 101. It has been found that the shaft 102 collides with the inlet end (edge) at the time of impact, and the shaft 102 breaks due to the concentration of stress therein. To remove this cause, chamfer the edge (inner peripheral edge) of the inlet end of the shaft insertion hole, apply adhesive so that the shaft is evenly positioned in the insertion hole, and install it carefully. There was a need to do.
[0003]
[Problems to be solved by the invention]
Even when the entrance end of the shaft insertion hole was chamfered, breakage still occurred when the shaft mounting was uneven. Moreover, since it takes time and effort to install the shaft evenly with respect to the hole, there is a problem in mass production. Furthermore, since there is a variation in the outer diameter of the shaft, the inner diameter of the shaft insertion hole is often processed to be large, so that the difference between the outer diameter of the shaft and the inner diameter of the shaft insertion hole may become too large. The amount of the adhesive to be used also increases, and it takes a long time for the adhesive to harden, making it difficult to fix the shaft. Therefore, measures such as sandwiching small pieces of celluloid etc. between the shaft and the inner wall of the shaft insertion hole are taken, but the shaft is biased by sandwiching the small pieces, and the cause of shaft breakage has still been removed. Absent.
[0004]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a golf club that does not require labor and skill, can be mounted in the center of the shaft insertion hole without bias, can be mass-produced, and prevents breakage accidents. To do.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides a depth of an insertion hole into which a shaft tip is inserted into a hosel portion provided in a head , S 1 (length of large diameter portion) + S 2 (length of insertion hole) + S 3 (the length of the tapered portion) is formed to be 28 to 38 mm, and an inner diameter D 1 that is 7 mm or more above the bottom of the insertion hole is formed to a large diameter portion that is 0.05 to 0.5 mm larger than the outer diameter of the shaft tip. , with an inner diameter D 2 the length S 2 is the distal end of the insertion hole 0.05~0.3mm smaller than the shaft tip outer diameter, the S 2 is set to about 2 mm, the large diameter portion from the distal end of the insertion hole the length S 3 and a tapered portion whose inner diameter gradually increases while leading to the length S 3 of the tapered portion and 5 to 8 mm, of the tapered portion the tip of the shaft at the tip side of the tapered portion The shaft is positioned in the center of the insertion hole by pressing against the wall surface, and the inner peripheral surface of the insertion hole To solidify the adhesive between the shift outer peripheral surface, in which the reinforced plastic of the shaft.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0007]
FIG. 1 shows a cross section of a hosel portion 1 provided in a head, and an insertion hole 2 into which a shaft tip is inserted is opened in the hosel portion 1. The insertion hole 2 has a depth of 28 to 38 mm. Inserting than 3~15mm from the hole 2 of the bottom 2A Aru an inner diameter D 1 of the upper formed in 0.05~0.5mm large larger diameter portion 2B from the shaft distal end outer diameter. Moreover, Aru tip inner diameter D 2 of the insertion hole 2 is formed smaller 0.05~0.3mm than the shaft distal outer diameter. Further, a taper portion 2C having a gradually increasing inner diameter is formed between the distal end of the insertion hole 2 and the large diameter portion 2B. The length S 1 of the large diameter portion 2B is about 22~28Mm, the length S 3 of the tapered portion 2C is about 5.0~8.0Mm, the length S 2 of the distal end is about 2 mm. Incidentally, the inner diameter D 1 of the large-diameter portion 2B is preferably larger than 0.07~0.20mm shaft tip outer diameter. The tip inner diameter D 2 of the insertion hole 2 is preferably than the shaft distal outer diameter 0.1~0.2mm reduced. Further, the length S 3 of the tapered portion 2C is preferably 5 to 10 mm. The entrance end of the insertion hole 2 of the hosel portion 1 is chamfered to form a chamfered portion 2D.
[0008]
FIG. 2 shows a state in which the shaft 3 is inserted into the insertion hole 2 and attached, and reference numeral 4 denotes an adhesive. The tip of the shaft 3 is pressed against the inner wall surface of the insertion hole 2 near the tip of the tapered portion 2C, and the shaft 3 is correctly inserted in this state. The outer diameter of the tip of the shaft 3 is 8 to 9.8 mm, and those made of reinforced plastic are suitable for use. In the case of an iron club, the outer diameter of the tip of the shaft 3 is preferably 9 to 9.8 mm.
[0009]
FIG. 3 shows a cross section in the state of FIG. 2 and shows a state in which the shaft 3 is positioned at the center of the insertion hole 2 without deviation.
[0010]
Table 1 below shows examples of the present invention and comparative examples thereof. “L” of “measurement item” in Table 1 indicates the depth of the insertion hole 2 and is the sum of S 1 + S 2 + S 3 .
[0011]
[Table 1]
Figure 0003723609
[0012]
Table 2 below shows the results of comparison of the biased state of the shaft 3 between the Examples 1 to 3 and the Comparative Examples 1 to 3 shown in Table 1, the fixing property, the ease of mounting, and the durability.
[0013]
[Table 2]
Figure 0003723609
[0014]
In Comparative Example 1, the hosel portion 100 shown in FIG. 4 was used, and the shaft mounting was uneven, and the fixability when applying and curing the adhesive was also poor. Comparative Example 2 has a long tapered portion, resulting in an increase in the portion with a small inner diameter, which makes it difficult to insert the shaft. Forcibly trying to insert it causes damage to the shaft neck and reduces durability. . Comparative Example 3 is a case where the inner diameter of the tip of the insertion hole is set to be equal to the outer diameter of the shaft. This is good for mounting, but the shaft is not sufficiently fixed, and as a result, the durability is also in the embodiment. It was inferior compared. In the first to third embodiments, it is important to arrange the tapered portion in the shaft insertion hole, but it is not only necessary to arrange the tapered portion, and its inner diameter and length are important.
[0015]
【The invention's effect】
As described above, according to the present invention, the depth of the insertion hole into which the shaft tip is inserted into the hosel portion provided in the head , S 1 (length of the large diameter portion) + S 2 (length of the insertion hole) + S 3 (the length of the tapered portion) is formed to be 28 to 38 mm, and an inner diameter D 1 that is 7 mm or more above the bottom of the insertion hole is formed to a large diameter portion that is 0.05 to 0.5 mm larger than the outer diameter of the shaft tip. , with an inner diameter D 2 the length S 2 is the distal end of the insertion hole 0.05~0.3mm smaller than the shaft tip outer diameter, the S 2 is set to about 2 mm, the large diameter portion from the distal end of the insertion hole the length S 3 and a tapered portion whose inner diameter gradually increases while leading to the length S 3 of the tapered portion and 5 to 8 mm, of the tapered portion the tip of the shaft at the tip side of the tapered portion The shaft is positioned in the center of the insertion hole by pressing against the wall surface, and the inner peripheral surface of the insertion hole Since the adhesive is solidified with the outer peripheral surface of the shaft and the shaft is made of reinforced plastic, the shaft cannot enter the tip of the insertion hole whose inner diameter is smaller than its outer diameter, and is fixed at the tip side of the taper part Will be. Therefore, in this fixed state, the shaft is positioned at the center of the insertion hole, and it is not necessary to fix the shaft by other means until the adhesive between the outer peripheral surface of the shaft and the inner peripheral surface of the insertion hole is solidified. Mounting work becomes easy and is advantageous for mass production. A shaft breakage accident can be prevented by accurately mounting the shaft in the insertion hole.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a hosel portion according to the present invention.
FIG. 2 is a cross-sectional view when a shaft is mounted.
FIG. 3 is a transverse sectional view when a shaft is mounted.
FIG. 4 is a cross-sectional view of a hosel portion showing a conventional example.
FIG. 5 is a cross-sectional view showing a shaft bias state in a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hosel part 2 Insertion hole 2A Bottom part 2B Large diameter part 2C Taper part 3 Shaft

Claims (4)

ヘッドに設けたホーゼル部にシャフト先端が挿入される挿入孔の深さ、S (大径部の長さ)+S (挿入孔の長さ)+S (テーパー部の長さ)を28〜38mmに形成し、
挿入孔の底部からmm以上上部の内径Dをシャフト先端外径より0.05〜0.5mm大きい大径部に形成し、
挿入孔の長さSである先端の内径Dをシャフト先端外径よりも0.05〜0.3mm小さく形成するとともに、S を2 mm 程度とし
挿入孔の先端から大径部に至る間の長さSを内径が徐々に大きくなるテーパー部に形成し、
このテーパー部の長さSを5〜8mmとし、
シャフトの先端をテーパー部の先端寄りでそのテーパー部の内壁面に圧接して挿入孔の中心にシャフトを位置させ、
挿入孔内周面とシャフト外周面との間で接着剤を固化させ、
前記シャフトを強化プラスチック製としたことを特徴とするゴルフクラブ。
Depth of the insertion hole into which the shaft tip is inserted into the hosel part provided in the head, S 1 (length of large diameter part) + S 2 (length of insertion hole) + S 3 (length of taper part) To 38mm,
An inner diameter D 1 of the upper from the bottom 7 mm or more insertion holes formed in 0.05~0.5mm greater large diameter portion than the shaft distal outer diameter,
An inner diameter D 2 of the front end is the length S 2 with 0.05~0.3mm formed smaller than the shaft distal end outer diameter of the insertion hole, the S 2 is set to about 2 mm,
The length S 3 between which from the distal end of the insertion hole leading to the large diameter portion and a tapered portion whose inner diameter gradually increases,
The length S3 of this taper portion is set to 5 to 8 mm,
Position the shaft at the center of the insertion hole by pressing the tip of the shaft closer to the tip of the taper and pressing against the inner wall of the taper.
Solidify the adhesive between the inner peripheral surface of the insertion hole and the outer peripheral surface of the shaft,
A golf club characterized in that the shaft is made of reinforced plastic.
挿入孔の先端内径Dをシャフト先端外径よりも0.1〜0.2mm小さくしたことを特徴とする請求項1に記載のゴルフクラブ。 2. The golf club according to claim 1, wherein the inner diameter D2 of the insertion hole is 0.1 to 0.2 mm smaller than the outer diameter of the shaft tip. 挿入孔先端の長さを2mm程度としたことを特徴とする請求項1又は2に記載のゴルフクラブ。  3. The golf club according to claim 1, wherein the length of the insertion hole tip is about 2 mm. 挿入孔の入口端に面取り加工を施して面取り部を形成したことを特徴とする請求項1ないし3のいずれか1項に記載のゴルフクラブ。  4. The golf club according to claim 1, wherein a chamfered portion is formed by chamfering the inlet end of the insertion hole.
JP24255795A 1995-08-28 1995-08-28 Golf club Expired - Fee Related JP3723609B2 (en)

Priority Applications (1)

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JP24255795A JP3723609B2 (en) 1995-08-28 1995-08-28 Golf club

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24255795A JP3723609B2 (en) 1995-08-28 1995-08-28 Golf club

Publications (2)

Publication Number Publication Date
JPH0956851A JPH0956851A (en) 1997-03-04
JP3723609B2 true JP3723609B2 (en) 2005-12-07

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