【０００１】[0001]
【産業上の利用分野】この発明は、打球部を補強するこ
とを目的とした金属バットの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal bat manufacturing method for reinforcing a hitting portion.
【０００２】[0002]
【従来の技術】従来金属バットの打球部の補強について
は、幾多の提案がある。例えば金属バットの打球部外周
に軸線と交差する方向に多数条の溝が形成され、その外
周に、樹脂含浸炭素繊維が巻きつけられた第１繊維強化
層と、その外周に更にクロスすう方向に樹脂含浸炭素繊
維が巻きつけられた第２繊維強化層が形成された野球用
バットの提案がある（実開昭６０−１８７７７６号公
報）。2. Description of the Related Art There have been many proposals for reinforcing a hitting portion of a conventional metal bat. For example, a large number of grooves are formed on the outer circumference of the hitting portion of a metal bat in a direction intersecting with the axis, and the first fiber reinforced layer in which resin-impregnated carbon fibers are wound around the outer circumference and a direction further crossing the outer circumference. There is a proposal for a baseball bat having a second fiber-reinforced layer wound with resin-impregnated carbon fibers (Japanese Utility Model Publication No. 60-187776).
【０００３】[0003]
【発明により解決すべき課題】前記従来の技術は、金属
バット本体に補強材を装着したものであるが、補強材
は、金属以外であったので、金属バット本体との一体性
について問題点があった。また金属補強材を用いた場合
にも金属バット本体と補強材とのなじみが悪い為に所期
の目的を達成できないので用いられなかったものと推定
される。In the above-mentioned prior art, a reinforcing material is attached to the metal bat body. However, since the reinforcing material is other than metal, there is a problem in the integrity with the metal bat body. there were. It is presumed that even when a metal reinforcing material was used, it was not used because the desired purpose could not be achieved due to poor compatibility between the metal bat body and the reinforcing material.
【０００４】[0004]
【課題を解決する為の手段】然るにこの発明は、金属バ
ット本体の打球部の外側に硬質金属パイプを嵌装し、こ
れをスエーヂング加工したので、金属バット本体と補強
材とはなじみがよくなり、前記従来の問題点を解決した
のである。However, according to the present invention, since the hard metal pipe is fitted on the outer side of the hitting portion of the metal bat body and swaging is performed, the metal bat body and the reinforcing material are well compatible with each other. That is, the above-mentioned conventional problems have been solved.
【０００５】即ちこの発明は金属バット本体の打球部外
側へ硬質金属よりなる肉薄パイプを嵌装し、前記肉薄パ
イプ部をスエーヂング加工して、面一に成形することを
特徴とした金属バットの製造方法である。また硬質金属
をチタン、チタン合金、ステンレスその他の特殊合金と
したものである。That is, according to the present invention, a thin metal pipe made of hard metal is fitted to the outside of a hitting portion of a metal bat body, and the thin pipe portion is swaged to form a flat surface. Is the way. The hard metal is titanium, titanium alloy, stainless steel or other special alloy.
【０００６】前記において、硬質金属パイプはスエーヂ
ング加工によって金属パイプ本体内に埋め込まれ一体化
するので、恰も同一金属の如く打球部を補強することに
なり、苛酷な外力を受けても剥れたり、別体になったり
するおそれはない。In the above, since the hard metal pipe is embedded and integrated in the metal pipe body by the swaging process, the hitting portion is reinforced like the same metal, so that the hard metal pipe is peeled off even when subjected to a severe external force, There is no danger of becoming a separate body.
【０００７】[0007]
【作用】この発明は、金属バット本体の打球部へ、硬質
金属よりなる肉薄パイプを嵌装し、スエーヂング加工に
より面一に成形するので、金属バット本体と肉薄パイプ
とは恰も同一金属の如く、一体となり、打球に対応する
ことができる。According to the present invention, since the thin wall pipe made of hard metal is fitted to the hitting portion of the metal bat body and is formed flush with the swaging process, the metal bat body and the thin wall pipe are like the same metal. It is possible to deal with hitting balls as a unit.
【０００８】即ち緊密に一体化し、部分的に剥れたり、
別体になるおそれはない。That is, they are tightly integrated with each other and partially peeled off,
There is no danger of becoming a separate body.
【０００９】[0009]
【実施例】アルミニウム合金よりなる金属バット本体１
の打球部１ａへ、チタン合金よりなる肉薄パイプ２を嵌
装し、前記打球部外側をスエーヂング加工して金属バッ
ト３を製造した。前記において、肉薄パイプ２は、金属
パイプ本体１の打球部へ恰も埋め込まれたようになり一
体化される（図４）。前記において、金属バット本体１
の打球部外径より、肉薄パイプ２の内径の方が大きいの
で（嵌装する為に大きくしてある）、当然肉薄パイプ２
の外径は金属バット１の外径より肉厚以上に大きいこと
になる。従ってスエーヂング加工により肉薄パイプ２は
縮径を余儀なくされ、肉厚変化（厚味を増す）と、外側
を鍛造の如く叩いて成形する加工（スエーヂング加工）
により硬度の上昇があり、補強効果を一層向上させるこ
とができる。[Example] Metal bat body 1 made of aluminum alloy
The thin walled pipe 2 made of a titanium alloy was fitted into the hitting portion 1a, and the outside of the hitting portion was swaged to manufacture the metal bat 3. In the above, the thin-walled pipe 2 is integrated so that it is almost embedded in the hitting portion of the metal pipe body 1 (FIG. 4). In the above, the metal bat body 1
Since the inner diameter of the thin-walled pipe 2 is larger than the outer diameter of the hit ball portion (is larger for fitting), naturally the thinner-walled pipe 2
The outer diameter of is larger than the outer diameter of the metal bat 1 by more than the wall thickness. Therefore, the thin pipe 2 is forced to reduce its diameter by the swaging process, and when the wall thickness changes (increases the thickness), the outside is tapped like a forging process (the swaging process).
As a result, the hardness is increased, and the reinforcing effect can be further improved.
【００１０】[0010]
【発明の効果】この発明は、金属バット本体の打球部を
硬質金属で補強するに際し、スエーヂング加工により面
一にしたので、金属バット本体と硬質金属とのなじみを
一層良好にすると共に、一体化し、かつ硬度を向上する
などの諸効果がある。従って打球時に、金属バット本体
から補強材が剥離又は脱落するおそれなく、全体が緊密
に固着されている効果がある。As described above, according to the present invention, when the hitting portion of the metal bat body is reinforced with the hard metal, it is made flush with the swaging process, so that the metal bat body and the hard metal are made to be more familiar and integrated. And, there are various effects such as improving hardness. Therefore, at the time of hitting a ball, there is an effect that the reinforcing material is firmly adhered to the whole body without fear of the reinforcing material peeling off or dropping from the metal bat body.
【図１】この発明の金属バット本体に肉薄パイプを嵌る
前の正面図。FIG. 1 is a front view of a metal bat body according to the present invention before fitting a thin pipe.
【図２】同じく金属バット本体に肉薄パイプを嵌めスエ
ーヂング成形した金属バットの正面図。FIG. 2 is a front view of a metal bat similarly swage-formed by fitting a thin pipe into the metal bat body.
【図３】同じく図２の縦断拡大端面図。FIG. 3 is an enlarged vertical end view of FIG.
【図４】同じく図２の一部縦断拡大正面図。FIG. 4 is a partially enlarged vertical front view of FIG.
１ 金属バット本体 ２ 肉薄パイプ ３ 金属バット 1 Metal bat body 2 Thin pipe 3 Metal bat
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3053757AJPH0557042A (en) | 1991-02-26 | 1991-02-26 | Manufacture of metallic bat |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3053757AJPH0557042A (en) | 1991-02-26 | 1991-02-26 | Manufacture of metallic bat |
| Publication Number | Publication Date |
|---|---|
| JPH0557042Atrue JPH0557042A (en) | 1993-03-09 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3053757APendingJPH0557042A (en) | 1991-02-26 | 1991-02-26 | Manufacture of metallic bat |
| Country | Link |
|---|---|
| JP (1) | JPH0557042A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6159116A (en)* | 1997-10-28 | 2000-12-12 | Pitsenberger; Dan S. | Softball bat with exterior shell |
| US6440017B1 (en)* | 1999-10-28 | 2002-08-27 | Steven L. Anderson | Metal bat having improved barrel structure |
| US7980970B2 (en) | 2008-05-09 | 2011-07-19 | Nippon Shaft Co., Ltd | Bat for baseball or softball |
| US7985149B2 (en) | 2008-11-17 | 2011-07-26 | Nippon Shaft Co., Ltd. | Bat for baseball or softball |
| US8007381B2 (en) | 2006-07-28 | 2011-08-30 | Nippon Shaft Co., Ltd. | Bat used for baseball or softball |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6159116A (en)* | 1997-10-28 | 2000-12-12 | Pitsenberger; Dan S. | Softball bat with exterior shell |
| US6287222B1 (en)* | 1997-10-28 | 2001-09-11 | Worth, Inc. | Metal bat with exterior shell |
| US6440017B1 (en)* | 1999-10-28 | 2002-08-27 | Steven L. Anderson | Metal bat having improved barrel structure |
| US8007381B2 (en) | 2006-07-28 | 2011-08-30 | Nippon Shaft Co., Ltd. | Bat used for baseball or softball |
| US7980970B2 (en) | 2008-05-09 | 2011-07-19 | Nippon Shaft Co., Ltd | Bat for baseball or softball |
| US7985149B2 (en) | 2008-11-17 | 2011-07-26 | Nippon Shaft Co., Ltd. | Bat for baseball or softball |
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