JP4606428B2 - Golf club iron set - Google Patents

Golf club iron set Download PDF

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JP4606428B2
JP4606428B2 JP2007040634A JP2007040634A JP4606428B2 JP 4606428 B2 JP4606428 B2 JP 4606428B2 JP 2007040634 A JP2007040634 A JP 2007040634A JP 2007040634 A JP2007040634 A JP 2007040634A JP 4606428 B2 JP4606428 B2 JP 4606428B2
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club
iron
golf club
iron set
weight
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JP2008200318A (en
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哲男 山代谷
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株式会社ヤードスティック
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Description

本発明は,ゴルフクラブのアイアンセットにおいて、Hw、L、Swを従来にない組み合わせにすることによって、ヘッドスピードの増大、ヘッドのターン性能の向上、スイング軌道の安定性の向上により、飛距離増大と方向安定性を向上させることである。
The present invention provides a golf club iron set with an unprecedented combination of Hw, L, and Sw, thereby increasing the head speed, improving the turn performance of the head, and improving the stability of the swing path, thereby increasing the flight distance. And to improve the directional stability.

従来のゴルフクラブのアイアンセットの中の#5アイアンにおいて、図1は、総重量Tw(以下Twとする)の軽いものから重いものまでをサンプルとして任意に抽出し、SwとTwの関係をプロットしたグラフであるが、SwとTwは、ほぼ1次式で表せる関係にある事が分かる。Twを計測すれば、Twは、Hw、Sw、グリップ重量Gw(以下Gwとする)の和であるので、図2に示すようにHwの平均値は257gで、標準偏差δ=2.1gの範囲にあった。すなわち、ばらつき幅±3δ(統計的には、99.7%が含まれる範囲)を考慮して場合、最も軽いと推定されるHwは、約250gである。ただし、過去に実売されたHwが、極めて軽いと思われるものとして、図4及び図5に示すクラブがあった。L=39.25inch、Hw=248gである。
平成11年4月1日発売商品の(株)コンセプトのBM-505Eアイアンカタログ。 第3版 実験計画法 上 著:田口玄一 発行:丸善株式会社
For the # 5 iron in the conventional golf club iron set, Fig. 1 plots the relationship between Sw and Tw by arbitrarily extracting samples from light to heavy weight of the total weight Tw (hereinafter referred to as Tw). It can be seen that Sw and Tw are in a relationship that can be expressed by a linear expression. If Tw is measured, Tw is the sum of Hw, Sw, and grip weight Gw (hereinafter referred to as Gw). Therefore, as shown in FIG. 2, the average value of Hw is 257 g, and the standard deviation is δ = 2.1 g. It was in. That is, when considering the variation width ± 3δ (statistically, the range including 99.7%), the Hw estimated to be the lightest is about 250 g. However, there was a club shown in FIGS. 4 and 5 as Hw that was actually sold in the past was considered to be extremely light. L = 39.25inch, Hw = 248g.
BM-505E iron catalog of the concept Co., Ltd. product released on April 1, 1999. 3rd Edition Experiment Design Method Author: Taichi Genichi Publisher: Maruzen Co., Ltd.

一般的にゴルフクラブのHwは、長さが長くなると、振りやすさを適切にするために軽くなっている。クラブの中で最も長さが長い、ドライバーは、Hwがおよそ195〜205gである。これは、ボールとヘッドの衝突において重量と速度の積によって定義される運動量が飛距離の増大において、最も効率的に機能する重量になっている。アイアンのHwは、グリップ端から14インチの点を支点するモーメントを一定にすることで振りやすさを合わせるようにしたスイングバランス理論によって、ドライバーなど他のクラブと合わせるように従来から管理されてきたので、図2に示すようにHwは、前記の効率的な重量からすると平均Hw=257gと重い。   In general, the Hw of a golf club becomes lighter to make it easier to swing as the length increases. The longest driver in the club, Hw is approximately 195-205g. This is the weight at which the momentum defined by the product of the weight and the velocity in the collision between the ball and the head functions most efficiently when the flight distance increases. Iron Hw has traditionally been managed to match other clubs, such as drivers, using a swing balance theory that matches the ease of swinging by keeping the moment that supports the 14-inch point from the grip end constant. Therefore, as shown in FIG. 2, Hw is as heavy as average Hw = 257 g from the above-mentioned efficient weight.

飛距離を増大するためにはクラブを軽くすれば良いという考えから図3の(2)のようにSwを55gと軽くした仕様があるが、それも、Hwは、ほとんど変わらず、振りやすく思えるものの、長さが、ほとんど同じであるため、ヘッドスピードは、ほとんど上がらない。図5に示すように、すべての番手のヘッドスピードを同一試験者で調査した場合、Lとヘッドスピード(以下H/Sとする)は、ほぼ比例することがわかっている。Lが長くなれば、H/Sが増大する。 From the idea that the club should be lightened to increase the flight distance, there is a specification that lightens the Sw as 55g as shown in (2) of Fig. 3, but that Hw is almost unchanged and seems easy to swing. However, since the length is almost the same, the head speed hardly increases. As shown in FIG. 5, when the head speeds of all the counts are investigated by the same tester, it is known that L and the head speed (hereinafter referred to as H / S) are approximately proportional. As L becomes longer, H / S increases.

図3の(4)に示すものは、図5,6のクラブと同一である。長尺アイアンと呼ばれていたモデルである。振りやすさを確保するためにHw=248g と従来の軽くし、Lが長いので、H/Sの増大は、得られたが、Swを軽くし、振りやすさを得ていたため、手元が軽すぎて、ヘッドが、振り遅れやすかったり、スイングの安定性も低かった。また、ヘッドが遠心力で、地面の方に引っ張られるいわゆるトウダウンと呼ばれるシャフトのたわみ現象も大きく、飛距離と方向安定性の両方を達成するには至らなかった。 What is shown in (4) of FIG. 3 is the same as the club of FIGS. This model was called a long iron. In order to ensure ease of swinging, Hw = 248g, which is lighter than before and L is long, so an increase in H / S was obtained, but because Sw was lightened and ease of swinging was obtained, the hand was light. The head was too late to swing and the stability of the swing was too low. In addition, a shaft bending phenomenon called so-called toe-down, in which the head is pulled toward the ground by centrifugal force, is large, and it has not been possible to achieve both flight distance and directional stability.

本発明のアイアンクラブは、5番アイアンの仕様がHw≦235g、L≧39.5inchで、前記の数式で表される、MI≧2,600,000gcm2となるようにし、かつ、番手が増えるにつれてクラブ長さLが短くなることを特徴とし、振りやすさを従来のクラブのレベルに保ちつつ、飛距離増大と方向安定性を向上させることである。
The iron club of the present invention has a specification of No. 5 iron, Hw ≦ 235 g , L ≧ 39.5 inch , represented by the above formula, MI ≧ 2,600,000 gcm 2 , and club length as the number increases. The feature is that L is shortened, and the flying distance is increased and the direction stability is improved while maintaining ease of swinging at the level of a conventional club.

クラブの振りやすさを比較するための、グリップ端を支点とするMIについて説明する。MIに影響を与える要因として、L、Hw、Sw、Gwがある。各要因のMIに対する影響の調査するために、実験計画法の直行表L9に前記の4つの要因を割り付けて、図9慣性モーメント測定装置を使って計測をした。
本実験は、文献2によって解説された手法である。
L9の割り付け表が図7である。各要因にそれぞれ3水準のレベルを設定する。テストNo.1〜9までの各要因の水準の組み合わせと結果の表が図8である。図9は、4つの要因の各水準の平均値から求めた主効果と、推定式である。Gwは、係数がゼロより小さいので、無視出来るものと判断する。
Lは、MI=(12.75×L-292.61)×10000
Swは、MI=(0.4×Sw+269.89)×10000
Hwは、MI=(1.3333×Hw+33.947)×10000
全平均は、293.89×10000
本結果から、推定されるMIは、次式で表される。単位は、gcm2である。
MI=((12.75×L-292.61)+(0.4×Sw+269.89)+(1.3333×Hw+33.947)-2×293.89) ×10000
MIによって、ゴルフクラブの振りやすさを判断することは、前記の要因が、ランダムに変化しても容易に計算で求めることができる。前記のバランス理論の場合、同じ長さ、同じバランス値のクラブでHwが重く、Swが軽いものと逆にHwが軽く、Swが重いものを比較した場合に、振りにくさが人によって全く判断が、異なることから、MIがゴルフクラブの振りやすさを判断するのに適切と考える。
Explain the MI with the grip end as a fulcrum for comparing the ease of swinging clubs. Factors affecting MI include L, Hw, Sw, and Gw. In order to investigate the influence of each factor on the MI, the above four factors were assigned to the orthogonal design table L9 of the experimental design method, and measurement was performed using the inertia moment measuring device in FIG.
This experiment is the method described in Document 2.
The allocation table for L9 is shown in FIG. Three levels are set for each factor. FIG. 8 shows a table of combinations of the levels of the respective factors from the test Nos. 1 to 9 and the result. FIG. 9 shows a main effect obtained from the average value of each level of the four factors and an estimation formula. Gw judges that it can be ignored because the coefficient is smaller than zero.
L is MI = (12.75 × L-292.61) × 10000
Sw is MI = (0.4 × Sw + 269.89) × 10000
Hw is MI = (1.3333 × Hw + 33.947) × 10000
Total average is 293.89 × 10000
From this result, the estimated MI is expressed by the following equation. The unit is gcm2.
MI = ((12.75 × L-292.61) + (0.4 × Sw + 269.89) + (1.3333 × Hw + 33.947) -2 × 293.89) × 10000
Judging the ease of swinging a golf club by MI can be easily calculated even if the above factors change randomly. In the case of the balance theory described above, when comparing clubs of the same length and the same balance value with heavy Hw, light Sw, and light Hw and heavy Sw, the difficulty of swinging is completely judged by the person. However, because they are different, MI considers it appropriate to determine the ease of swinging a golf club.

前記の図3に示した(1)から(4)の従来クラブのMIは、約2,600,000以上あり、小さすぎるとスイングが不安定となり、安定してボールを打てない。   The MI of the conventional clubs (1) to (4) shown in FIG. 3 is about 2,600,000 or more. If it is too small, the swing becomes unstable and the ball cannot be hit stably.

図10に、本発明の仕様を被験者2名によって、実際にボールを打って、計測した結果を示す。被験者A男性は、本発明クラブによって、ボール初速が、54.4m/secから56.9m/secまで増速し、飛距離もキャリーが、181.6yardから196.2yardに伸びている。着地後の転がりも含めたトータル飛距離は、188.8yardから204.3yardに伸びている。被験者B男性においても、Aと同様の効果が確認できた。   FIG. 10 shows the result of measuring the specification of the present invention by actually hitting a ball by two subjects. Subject A male increased the initial ball speed from 54.4 m / sec to 56.9 m / sec and the carry distance increased from 181.6 yards to 196.2 yards with the club of the present invention. The total flight distance including rolling after landing has increased from 188.8 yards to 204.3 yards. In subject B male, the same effect as A was confirmed.

図3において、本発明のクラブは(5)例1から(9)例5である。請求の範囲で示したHw≦235g において、ばらつきを考慮した中心値としてHwを230gとし、Lは、39.5インチで、従来のクラブの(1)〜(3)の長さ37.5〜38より1.5〜2インチ長い。また、Swも68〜120gまでの5段階での慣性モーメントを求めたが、MIは、26,000,000〜28,100,000と従来のクラブと同レベルの範囲に入っている。また、H=230gであっても、不適合と判断される仕様を(10)〜(13)に示す。(10)、(11)は、Swが55gの場合だが、MIが小さすぎて、スイングの安定性が確保できない。また、(12)は、前者と同じSw55gで、Lを40inchまで長くした仕様だが、Swが軽いために、振り遅れやすい。(13)は、Swを重くした場合だが、MIは、Lが38インチだと、従来のクラブと同レベルの範囲に入るもののH/Sの増大が得られない。本発明の適合性のある仕様は、組み合わせは多々考えられるが、(5)〜(9)の仕様となる。   In FIG. 3, the clubs of the present invention are (5) Example 1 to (9) Example 5. In Hw ≦ 235g shown in the claims, Hw is 230g as a center value considering variation, L is 39.5 inches, and 1.5 to 1.5 from the lengths 37.5 to 38 of the conventional clubs (1) to (3) 2 inches long. Also, Sw obtained the moment of inertia in 5 stages from 68 to 120 g, but MI was in the range of 26,000,000 to 28,100,000, the same level as the conventional club. Also, even if H = 230 g, specifications that are determined to be nonconforming are shown in (10) to (13). (10) and (11) are when Sw is 55g, but MI is too small to ensure swing stability. Also, (12) is the same Sw55g as the former, and the length is up to 40 inches. However, because Sw is light, it is easy to delay. (13) is a case where Sw is heavy, but MI is in the same level range as conventional clubs when L is 38 inches, but H / S cannot be increased. Although there are many possible combinations of compatible specifications of the present invention, the specifications are (5) to (9).

請求の範囲においてL、Hw、Swは色々な組み合わせが考えられるが、図3の本発明の仕様(5)〜(9)が代表的な例である。MIの大きさは、体力によって、選択できる。体力の小さい人はMIの小さい方を選択する。 In the claims, various combinations of L, Hw, and Sw are conceivable, but the specifications (5) to (9) of the present invention in FIG. 3 are typical examples. The size of MI can be selected according to physical strength. People with small physical strength choose the one with the smaller MI.

市販の#5アイアンのヘッド、シャフトの重量の調査結果を示す図である。It is a figure which shows the investigation result of the weight of a commercially available # 5 iron head and shaft. 市販の#5アイアンの総重量とシャフト重量の関係を示す図である。It is a figure which shows the relationship between the total weight of commercially available # 5 iron, and a shaft weight. クラブ全体の慣性モーメントの比較を示す図である。It is a figure which shows the comparison of the inertia moment of the whole club. クラブ長さとヘッドスピードの関係を示す図である。It is a figure which shows the relationship between club length and head speed. (株)コンセプトのBM-505Eアイアンのカタログである。(非特許文献1)It is a catalog of BM-505E iron of concept. (Non-Patent Document 1) BM-505Eアイアンの長さとヘッド重量の表である。It is a table | surface of the length and head weight of BM-505E iron. 慣性モーメント測定装置(米国Inertia Dynamics社:Model MOI-005-104)Moment of inertia measurement device (Inertia Dynamics, USA: Model MOI-005-104) 実験計画法の直交表L9によるクラブ全体の慣性モーメントMIの測定Measurement of the moment of inertia MI of the entire club using the orthogonal design table L9 要因の主効果とMIの推定計算式Main effects of factors and formulas for estimating MI 被験者による現使用クラブと本発明クラブの比較試打テスト結果Comparison test results of the current club and the present club by the subject

Claims (1)

ゴルフクラブのアイアンセットであって、5番アイアンの仕様において、クラブ長さL(inch)、ヘッド重量Hw(g)、シャフト重量Sw(g)、としたとき、数式MI=((12.75×L-292.61)+(0.4×Sw+269.89)+(1.3333×Hw+33.947)-2×293.89)×10000で導かれるグリップの手元端を支点とするクラブ全体の慣性モーメントMI(gcm2)がMI≧2,600,000gcm2であり、Hw≦235g、L≧39.5inchであって、番手が増えるにつれてクラブ長さLが短くなることを特徴とするアイアンセット。

An iron set of a golf club. In the specification of No. 5 iron, when the club length L (inch), the head weight Hw (g), and the shaft weight Sw (g), the formula MI = ((12.75 × L -292.61) + (0.4 × Sw + 269.89) + (1.3333 × Hw + 33.947) -2 × 293.89) × the overall club to pivot the proximal end of the grip guided by 10000 inertia MI (gcm 2) is MI ≧ An iron set characterized by 2,600,000 gcm 2 , Hw ≦ 235 g, L ≧ 39.5 inch , and the club length L decreases as the number increases.

JP2007040634A 2007-02-21 2007-02-21 Golf club iron set Expired - Fee Related JP4606428B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000317017A (en) * 1999-05-11 2000-11-21 Uchiyama Mitsuko Golf club set
JP2005511169A (en) * 2001-11-30 2005-04-28 フィール ゴルフ エルエルシー Elongated golf club grip

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000317017A (en) * 1999-05-11 2000-11-21 Uchiyama Mitsuko Golf club set
JP2005511169A (en) * 2001-11-30 2005-04-28 フィール ゴルフ エルエルシー Elongated golf club grip

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