JP4091056B2 - 野球またはソフトボール用バット - Google Patents
野球またはソフトボール用バット Download PDFInfo
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- JP4091056B2 JP4091056B2 JP2005086762A JP2005086762A JP4091056B2 JP 4091056 B2 JP4091056 B2 JP 4091056B2 JP 2005086762 A JP2005086762 A JP 2005086762A JP 2005086762 A JP2005086762 A JP 2005086762A JP 4091056 B2 JP4091056 B2 JP 4091056B2
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
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- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
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Description
他方、バット先端からの距離xと反発係数Zとの関係についても検討したところ、たとえば下記のような近似式(3)でバット先端からの距離xと反発係数Zとの関係を近似できることも判明した。なお下記の近似式(3)におけるD,E,Fは定数である。
ここで、反発係数の設定値をe、打芯部の反発係数をZ(0)、バット先端からの各位置の反発係数をZ(x)とし、打芯部の反発係数Z(0)に各位置の反発係数Z(x)を合わせる場合には、反発係数の設定値eを下記の数式(4)で表すことができる。
上記の数式(3)によって各位置の反発係数を算出し、反発係数の設定値eを所望の値に設定することで、数式(4)によって各位置の第1弾性体層3aの厚みtを求めることができる。
Claims (3)
- 打球部に凹部(2a)を有するバット本体(2)と、
前記凹部(2a)に装着され比重が0.01以上0.25未満でありJIS C硬度が3以上80以下である第1弾性体層(3a)と、該第1弾性体層(3a)の外周面を覆い前記第1弾性体層(3a)よりも硬度が高い第2弾性体層(3b)とを含む弾性体(3)とを備え、
前記第2弾性体層(3b)の厚みを、前記バット本体(2)の長手方向における前記凹部(2a)の端部側よりも前記凹部(2a)の中央部側で大きくし、
前記第1弾性体層(3a)の厚みを、前記バット本体(2)の長手方向における前記凹部(2a)の端部側よりも前記凹部(2a)の中央部側で小さくした、野球またはソフトボール用バット。 - 打球部に凹部(2a)を有するバット本体(2)と、
前記凹部(2a)に装着され比重が0.01以上0.25未満でありJIS C硬度が3以上80以下である第1弾性体層(3a)と、該第1弾性体層(3a)の外周面を覆い前記第1弾性体層(3a)よりも硬度が高い第2弾性体層(3b)とを含む弾性体(3)とを備え、
前記第2弾性体層(3b)の厚みを、前記バット本体(2)の長手方向における前記凹部(2a)の中央部側よりも前記凹部(2a)の端部側で大きくし、
前記第1弾性体層(3a)の厚みを、前記バット本体(2)の長手方向における前記凹部(2a)の中央部側よりも前記凹部(2a)の端部側で小さくした、野球またはソフトボール用バット。 - 前記第1弾性体層(3a)を、ポリウレタン発泡体またはオレフィン系樹脂発泡体で構成した、請求項1または請求項2に記載の野球またはソフトボール用バット。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005086762A JP4091056B2 (ja) | 2004-03-25 | 2005-03-24 | 野球またはソフトボール用バット |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004089484 | 2004-03-25 | ||
JP2005086762A JP4091056B2 (ja) | 2004-03-25 | 2005-03-24 | 野球またはソフトボール用バット |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005305146A JP2005305146A (ja) | 2005-11-04 |
JP4091056B2 true JP4091056B2 (ja) | 2008-05-28 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005086762A Active JP4091056B2 (ja) | 2004-03-25 | 2005-03-24 | 野球またはソフトボール用バット |
Country Status (1)
Country | Link |
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JP (1) | JP4091056B2 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4905664B2 (ja) | 2006-07-28 | 2012-03-28 | 日本発條株式会社 | 野球用又はソフトボール用バット |
JP5397581B2 (ja) * | 2007-06-12 | 2014-01-22 | 美津濃株式会社 | 野球またはソフトボール用バット |
JP4636630B2 (ja) * | 2008-05-09 | 2011-02-23 | 日本発條株式会社 | 野球用又はソフトボール用バット |
US7993223B2 (en) | 2008-05-09 | 2011-08-09 | Nippon Shaft Co., Ltd | Bat for baseball or softball |
US7980970B2 (en) | 2008-05-09 | 2011-07-19 | Nippon Shaft Co., Ltd | Bat for baseball or softball |
JP5354718B2 (ja) | 2008-11-17 | 2013-11-27 | 日本発條株式会社 | 野球用又はソフトボール用バット |
US10967235B2 (en) * | 2018-10-24 | 2021-04-06 | Mizuno Corporation | Bat system with performance limiting structure and methods of making same |
JP6913711B2 (ja) * | 2019-05-20 | 2021-08-04 | ローリングス・スポーティング・グッズ・カンパニー・インコーポレーテッドRawlings Sporting Goods Company,Inc. | 野球又はソフトボール用バット |
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2005
- 2005-03-24 JP JP2005086762A patent/JP4091056B2/ja active Active
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JP2005305146A (ja) | 2005-11-04 |
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