JPH0975492A - Swing practice device - Google Patents
Swing practice deviceInfo
- Publication number
- JPH0975492A JPH0975492A JP23703495A JP23703495A JPH0975492A JP H0975492 A JPH0975492 A JP H0975492A JP 23703495 A JP23703495 A JP 23703495A JP 23703495 A JP23703495 A JP 23703495A JP H0975492 A JPH0975492 A JP H0975492A
- Authority
- JP
- Japan
- Prior art keywords
- hit
- bat
- practice
- hitting
- batting
- 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.)
- Pending
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、野球のバットを
素振りしてバッティングの練習を行う素振り練習に適用
される素振り練習用具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a practicing swing tool applied to a practicing practicing a baseball bat by practicing batting.
【０００２】[0002]
【従来の技術】従来では、バッティングの素振り練習に
際し、床面上乃至地面上に載置される台板と、この台板
上に立設されたポ−ルと、このポ−ルの上端に取付けら
れてボ−ルが載置されるティ−とを備えた素振り練習用
具が使用されていた。2. Description of the Related Art Conventionally, when practicing batting, a base plate to be placed on the floor or the ground, a pole erected on the base plate, and an upper end of the pole. A swing-practice exercise tool having a tee attached to which a ball is placed is used.
【０００３】[0003]
【発明が解決しようとする課題】上記した従来の素振り
練習用具では多数個のボ−ルが必要で、叩打したボ−ル
群を回収する回収作業が必要となる問題点や、ボ−ルを
バットの真芯で叩打したか否かを判断しにくい等の問題
点がある。本発明は素振り動作の適否の判断を明確化し
て練習効果を高めることを課題とするものである。SUMMARY OF THE INVENTION In the above-mentioned conventional practice swing tool, a large number of balls are required, and there is a problem that a recovery operation for recovering the struck ball group is required, and the balls are eliminated. There is a problem that it is difficult to determine whether or not the bat has hit the true core. An object of the present invention is to clarify the judgment as to whether or not a swinging motion is appropriate and enhance the practice effect.
【０００４】[0004]
【課題を解決するための手段】請求項１の発明は、上下
方向への変位可能に設置される支持体には、合成樹脂材
によって弾性曲げ変形可能に形成されてほぼ水平方向に
沿って設置される被叩打部材を、バットで叩打される自
由端が前記被叩打部材の先端付近に形成された片持ち状
態で結合した構成を有する。According to a first aspect of the present invention, a support body that is vertically displaceable is made of a synthetic resin material so as to be elastically bendable, and is installed substantially horizontally. The hit member to be hit is connected in a cantilever state in which the free end hit by a bat is formed near the tip of the hit member.
【０００５】請求項１の発明では、素振り練習に際し、
被叩打部材の自由端をバットで叩打すると、被叩打部材
が曲げ変形してから元の形態に復帰変形するとともに、
被叩打部材とバットとの衝突による叩打音が発生し、そ
の叩打音によって被叩打部材を叩打したときの素振り動
作およびバッティングフォ−ムの適否が判断される。According to the first aspect of the invention, when practicing a swing,
When the free end of the struck member is struck with a bat, the struck member deforms by bending and then returns to its original form, and
A hitting sound is generated due to the collision between the hitting member and the bat, and the hitting sound determines the suitability of the swinging motion and the batting form when the hitting member is hit.
【０００６】請求項２の発明は、請求項１の発明におい
て、前記被叩打部材を野球用のボ−ルの外径より縮小さ
れた外径を有するほぼ丸棒状に形成したことを特徴とす
る。The invention of claim 2 is characterized in that, in the invention of claim 1, the hit member is formed in a substantially round bar shape having an outer diameter reduced from the outer diameter of a ball for baseball. .
【０００７】請求項２の発明では、バットで叩打する目
標物の大きさが実際のボールの大きさより縮小され、静
止したボールをバットの真芯で叩打するバッティング技
術より、被叩打部材をバットの真芯で叩打するバッティ
ング技術の方が高度となって練習効果が高められる。According to the second aspect of the present invention, the size of the target to be hit with the bat is made smaller than the actual size of the ball, and the hitting member is hit with the bat by the batting technique of hitting a stationary ball with the true center of the bat. The batting technique of hitting with a true heart is more advanced and the practice effect is enhanced.
【０００８】[0008]
【発明の実施の形態】請求項１の発明において、被叩打
部材の上方に設置されて支持体に取外し可能に連結され
たティーバッティング用のティーと、被叩打部材とを併
設し、被叩打部材を叩打する素振り練習と、ティー上の
ボールを叩打する素振り練習とが選択的に行われるよう
に構成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the invention of claim 1, the tee batting tee installed above the struck member and detachably connected to the support, and the struck member are provided side by side. It is configured so that the practicing practice of striking the ball and the practicing practice of striking the ball on the tee are selectively performed.
【０００９】また、請求項１の発明において、支持体を
駆動して上下方向へ繰返し往復移動させ、被叩打部材の
高さを一定範囲内で漸次変化させる支持体駆動機構を設
ける。Further, in the invention of claim 1, there is provided a support body drive mechanism for driving the support body to repeatedly reciprocate in the vertical direction and gradually changing the height of the hit member within a certain range.
【００１０】[0010]
【実施例】次に、本発明の１実施例を図１〜図５にした
がって説明する。野球用のバットを素振りしてバッティ
ングの素振り練習を行うときに使用される素振り練習用
具Ａは持ち運び可能な可搬型で分解および組立て可能に
形成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to FIGS. A swinging practice tool A used when swinging a baseball bat to perform batting practice is formed as a portable, portable type that can be disassembled and assembled.
【００１１】素振り練習用具Ａにおいて、円板状の基台
１は素振り練習用具Ａの設置状態を安定にするために必
要な適度の重量および大きさを有し、練習時に床面若し
くは地面等の設置面Ｓ上に乗置される。In the practice swing tool A, the disk-shaped base 1 has an appropriate weight and size necessary for stabilizing the installation state of the practice swing tool A, and can be used on the floor or the ground during practice. It is placed on the installation surface S.
【００１２】基台１の中心部上にはこの基台１に固定さ
れた丸パイプ状の支柱２が直立状に立設されている。On the central portion of the base 1, a round pipe-shaped support 2 fixed to the base 1 is erected upright.
【００１３】支柱２の上端付近にはこの上端付近に形成
されたナット部２ａに螺嵌された高さ調節ねじ３が結合
されている。A height adjusting screw 3 screwed into a nut portion 2a formed near the upper end of the column 2 is connected to the upper end of the column 2.
【００１４】支柱２には、下部が支柱２内に挿入されて
高さ調節ねじ３によって取外し可能に締結され、基台１
の上方に上下方向への変位可能に設置されたほぼ丸パイ
プ状の支持体４が直立状で取外し可能に結合されてい
る。The lower portion of the column 2 is inserted into the column 2 and is removably fastened by the height adjusting screw 3, so that the base 1
A substantially circular pipe-shaped support body 4 which is installed so as to be displaceable in the up-and-down direction above is vertically and detachably coupled.
【００１５】支持体４の上部付近には丸孔状の挿通孔４
ａが貫設され、支持体４の上端には止めねじ６が螺嵌さ
れたナット部４ｂが形成され、また、支持体４には高さ
調節ねじ３が当接された平坦な当り面４ｃが全長にわた
って形成されている。A round hole-shaped insertion hole 4 is provided near the upper portion of the support 4.
a is penetrated, a nut portion 4b into which a set screw 6 is screwed is formed at the upper end of the support body 4, and a flat contact surface 4c on which the height adjusting screw 3 is abutted on the support body 4 Are formed over the entire length.
【００１６】支持体４内にはこの支持体４の下端と挿通
孔４ａの下側孔縁との間にわたって立設されて支持体４
に固定された受け部材５が挿入され、この受け部材５の
上端には挿通孔４ａの孔縁とほぼ等しい曲率半径で凹円
弧面状に湾曲した形状を有し、挿通孔４ａの下側孔縁と
等しい位置に配設された受け面５ａが形成されている。In the support body 4, the support body 4 is erected upright between the lower end of the support body 4 and the lower hole edge of the insertion hole 4a.
The receiving member 5 fixed to the insertion hole 4a is inserted into the receiving member 5, and the upper end of the receiving member 5 has a shape curved in a concave arc surface with a radius of curvature substantially equal to the hole edge of the insertion hole 4a. A receiving surface 5a is formed at the same position as the edge.
【００１７】支持体４には比較的軟質の合成樹脂材によ
って弾性曲げ変形可能に形成されて野球用のボールの外
径およびバットの打撃部の外径より充分に縮小された外
径を有し、素振り練習時にバットによって繰返し叩打さ
れる丸棒状の被叩打部材７が取外し可能に結合され、本
例では被叩打部材７は外径が約１５mmで高度の曲げ弾発
力を有するポリウレタン樹脂製の丸棒材によって形成さ
れている。The support 4 is made of a relatively soft synthetic resin material so as to be elastically bendable and deformable, and has an outer diameter sufficiently smaller than the outer diameter of the baseball and the hitting portion of the bat. A round rod-shaped hitting member 7 that is repeatedly hit by a bat at the time of practicing swinging is detachably connected. In this example, the hitting member 7 is made of polyurethane resin having an outer diameter of about 15 mm and a high bending elastic force. It is made of round bar material.
【００１８】被叩打部材７は、その基端付近が支持体４
の挿通孔４ａに貫挿されてバットで叩打する目標となる
自由端８が先端付近に形成された片持ち状態で受け部材
５と止めねじ６との間に解離可能に挟止されて水平方向
に沿って設置されている。The hitting member 7 has a support 4 near the base end thereof.
In a cantilever state in which the free end 8 to be hit with a bat is inserted in the insertion hole 4a of the bat and is detachably clamped between the receiving member 5 and the set screw 6 in the horizontal direction. It is installed along.
【００１９】被叩打部材７の自由端８付近の外周面には
叩打する部位を識別し易くする目印９が表示されてい
る。A mark 9 is provided on the outer peripheral surface of the hitting member 7 in the vicinity of the free end 8 for facilitating identification of the hitting portion.
【００２０】但し、図５に示すように被叩打部材７の自
由端８の先端に球体状の打撃部８ａを形成してもよい。However, as shown in FIG. 5, a spherical striking portion 8a may be formed at the tip of the free end 8 of the striking member 7.
【００２１】設置面Ｓから被叩打部材７までの高さは、
支持体４を高さ調節ねじ３によって上下方向へ移動調整
することによって練習者の身長に合わせて調整される。The height from the installation surface S to the hit member 7 is
The support 4 is moved up and down by the height adjusting screw 3 to be adjusted according to the height of the practitioner.
【００２２】素振り練習に際し、練習者が被叩打部材７
の自由端８をバットで叩打すると、被叩打部材７が曲げ
変形してから元通りの形態に復帰変形するとともに、バ
ットが被叩打部材７の自由端８に衝突したときに叩打音
が発生し、自由端８をバットの真芯で叩打したときには
快音が発生し、自由端８をバットの真芯以外で叩打した
ときには擦れ音が発生する。When practicing swinging, the practitioner gives the member 7 to be hit.
When the free end 8 of the bat is hit with a bat, the hit member 7 is bent and deformed and then returned to its original shape, and when the bat collides with the free end 8 of the hit member 7, a hit sound is generated. A pleasant sound is generated when the free end 8 is tapped with the center of the bat, and a rubbing sound is generated when the free end 8 is tapped with a center other than the center of the bat.
【００２３】上記した実施例によれば、被叩打部材７を
繰返し叩打しても、被叩打部材７が元通りの形態に復元
するので、被叩打部材７を取替えたり、回収する作業が
不要となり、素振りバッティング練習に伴う付随作業を
無くして素振りバッティング練習を簡便化することがで
きる。According to the above-mentioned embodiment, even if the member 7 to be beaten is repeatedly hit, the member 7 to be hit is restored to the original shape, so that the work to replace the member 7 to be hit or to recover the member 7 is unnecessary. , It is possible to simplify the practice swing batting practice by eliminating the accompanying work involved in the practice swing batting practice.
【００２４】とくに、被叩打部材７をバットによって叩
打したときの被叩打部材７とバットとの衝突状態によっ
て被叩打部材の曲げ変形形態および叩打音が変化し、被
叩打部材７の自由端８をバットの真芯で適正に叩打した
ときには被叩打部材７およびバットが快音を発し、被叩
打部材７の自由端８をバット真芯以外で不適正に叩打し
たときには被叩打部材およびバットが擦れ音を発するの
で、被叩打部材７をバットで叩打したときの手ごたえを
練習者が叩打音によって明確に聞き分けて被叩打部材７
の自由端８を真芯で叩打したか否かを的確に判断するこ
とができるとともに、被叩打部材７を叩打したときのバ
ッティングフォ−ムが適正か否かを的確に判断すること
ができる。In particular, when the hit member 7 is hit with a bat, the bending deformation mode and the hitting sound of the hit member 7 change depending on the state of collision between the hit member 7 and the bat, and the free end 8 of the hit member 7 is changed. The member 7 and the bat make a pleasant sound when the bat is properly beaten with the true center of the bat, and when the free end 8 of the struck member 7 is inappropriately struck except the true center of the bat, the struck member and the bat make a rubbing noise. Since the sound is emitted, the practitioner can clearly distinguish the response when the hit member 7 is hit with a bat by the hit sound, and the hit member 7
It is possible to accurately determine whether or not the free end 8 of the object 7 is hit with a true core, and also it is possible to accurately determine whether or not the batting form when the member 7 to be hit is hit is appropriate.
【００２５】従って、被叩打部材７をバットで繰り返し
叩打することによって、バッティングフォ−ムを矯正し
てバッティング技術を向上させる適切な素振り練習を効
果的に行うことができ、素振り練習の練習効果を高める
ことができる。Therefore, by repeatedly striking the struck member 7 with a bat, it is possible to effectively carry out an appropriate practicing exercise that corrects the batting form and improves the batting technique, and the practicing effect of the practicing exercise is improved. Can be increased.
【００２６】また、被叩打部材７が水平方向に沿って設
置され、また、被叩打部材７の外径がボールの外径より
縮小されているので、被叩打部材７をバットの真芯で適
正に叩打するためには、静止したボールをバットの真芯
で適正に叩打するバッティング技術より厳正で高度のバ
ッティング技術が要求されることになり、被叩打部材７
を繰り返し叩打することによる練習効果とくにバッティ
ングフォ−ムの矯正効果を高めてバッティング技術を的
確に向上させることができる。Further, since the beating member 7 is installed along the horizontal direction and the outer diameter of the beating member 7 is smaller than the outer diameter of the ball, the beating member 7 should be properly centered on the bat. In order to hit the ball, a batting technique that is more rigorous and sophisticated than the batting technique that properly hits a stationary ball with the true center of the bat is required.
It is possible to improve the batting technique by improving the effect of practicing by repeatedly hitting, particularly the effect of correcting the batting form.
【００２７】次に、図６に示す本発明の第２実施例の素
振り練習用具Ａについて説明すると、本例では素振り練
習用具Ａには被叩打部材７とティーバッティング練習用
のティー１０とが併設されている。Next, the practicing swing practice tool A of the second embodiment of the present invention shown in FIG. 6 will be described. In this example, the practicing swing practice tool A is provided with a hitting member 7 and a tee 10 for practicing tee batting. Has been done.
【００２８】素振り練習用具Ａは第１実施例と同様に構
成された基台１、支柱２、支持体４および被叩打部材７
を備えるとともに、支持体４には被叩打部材７の上方に
設置された硬質合成樹脂製のティー１０が取外し可能に
連結されている。The swing-practice implement A has a base 1, a support 2, a support 4 and a hit member 7 which are constructed in the same manner as in the first embodiment.
Further, a tee 10 made of hard synthetic resin, which is installed above the hitting member 7, is detachably connected to the support body 4.
【００２９】支持体４には丸パイプ状の連結部材１１が
連結ねじ１２によって上下方向への移動調整および取外
し可能に結合され、この連結部材１１の上端にはティー
１０の基端部が止めねじ１３によって取外し可能に結合
されている。A round pipe-shaped connecting member 11 is connected to the support body 4 by a connecting screw 12 so as to be vertically movable and removable, and the base end of the tee 10 is fixed to the upper end of the connecting member 11 with a set screw. Detachably coupled by 13.
【００３０】ティー１０の上端面には凹球面状に形成さ
れてボールＢが載置されるボール受け面１０ａが凹設さ
れている。At the upper end surface of the tee 10, a ball receiving surface 10a, which is formed in a concave spherical shape and on which the ball B is placed, is provided as a recess.
【００３１】次に、本発明の第３実施例の素振り練習用
具Ａについて説明すると、本例では第１実施例の素振り
練習用具Ａにおいて、基台１上には支持体４を駆動して
軸方向へ繰返し往復移動させ、被叩打部材７の高さを一
定範囲内で連続的に変化させる支持体駆動機構が設置さ
れ、この支持体駆動機構は例えばモータと、回転伝達部
材と、カムと、カムフォロア等によって構成される。Next, the practicing swing practice tool A of the third embodiment of the present invention will be described. In this example, in the practicing swing practice tool A of the first embodiment, the support 4 is driven on the base 1 to drive the shaft. A support body drive mechanism is installed which is reciprocally moved in the direction to continuously change the height of the hit member 7 within a certain range. The support body drive mechanism includes, for example, a motor, a rotation transmission member, a cam, It consists of a cam follower.
【００３２】[0032]
【発明の効果】請求項１の発明によれば、被叩打部材を
繰返し叩打しても、被叩打部材が元通りの形態に復元す
るので、被叩打部材を取替えたり、回収する作業が不要
となり、素振りバッティング練習に伴う付随作業を無く
して素振りバッティング練習を簡便化することができ
る。According to the invention of claim 1, even if the member to be beaten is repeatedly hit, the member to be hit is restored to the original shape, so that the work to replace the member to be hit or to recover the member is unnecessary. , It is possible to simplify the practice swing batting practice by eliminating the accompanying work involved in the practice swing batting practice.
【００３３】とくに、被叩打部材をバットによって叩打
したときの被叩打部材とバットとの衝突状態によって被
叩打部材の曲げ変形形態および叩打音が変化し、被叩打
部材をバットの真芯で適正に叩打したときには被叩打部
材およびバットが快音を発し、被叩打部材をバット真芯
以外で不適正に叩打したときには被叩打部材およびバッ
トが擦れ音を発するので、被叩打部材をバットで叩打し
たときの手ごたえを練習者が叩打音によって明確に聞き
分けて被叩打部材を真芯で叩打したか否かを的確に判断
することができるとともに、被叩打部材を適正なバッテ
ィングフォ−ムで叩打したか否かを的確に判断すること
ができる。Particularly, when the hit member is hit by a bat, the bending deformation mode and the hitting sound of the hit member change depending on the state of collision between the hit member and the bat, and the hit member is properly centered on the bat. When struck, the struck member and the bat produce a pleasant sound, and when the struck member is improperly struck except the core of the bat, the struck member and the bat make a rubbing sound. The practitioner can clearly distinguish the response by the tapping sound to accurately judge whether or not the member to be beaten is hit with the core, and whether or not the member to be hit is hit with an appropriate batting form. Can be accurately determined.
【００３４】従って、被叩打部材をバットで繰り返し叩
打することによって、バッティングフォ−ムを矯正して
バッティング技術を向上させる適切な素振り練習を効果
的に行うことができ、素振り練習の練習効果を高めるこ
とができる。Therefore, by repeatedly striking the member to be beaten with the bat, it is possible to effectively practice proper swinging practice to correct the batting form and improve the batting technique, and enhance the practice effect of the practice swinging practice. be able to.
【００３５】請求項２の発明によれば、被叩打部材が水
平方向に沿って設置され、また、被叩打部材の外径がボ
ールの外径より縮小されているので、被叩打部材をバッ
トの真芯で適正に叩打するためには、静止したボールを
バットの真芯で適正に叩打するバッティング技術より厳
正で高度のバッティング技術が要求されることになり、
被叩打部材を繰り返し叩打することによる練習効果とく
にバッティングフォ−ムの矯正効果を高めてバッティン
グ技術を的確に向上させることができる。According to the second aspect of the present invention, the hit member is installed along the horizontal direction, and the outer diameter of the hit member is smaller than the outer diameter of the ball. In order to properly strike with a true core, a stricter and more advanced batting technique is required than the batting technique that properly strikes a stationary ball with the true center of the bat,
It is possible to improve the batting technique by improving the effect of practicing by repeatedly hitting the member to be hit, particularly the effect of correcting the batting form.
【図１】本発明の第１実施例を示す素振り練習用具の正
面図である。FIG. 1 is a front view of a practice swing tool according to a first embodiment of the present invention.
【図２】図１のX1−X1線拡大断面図である。FIG. 2 is an enlarged sectional view taken along line X1-X1 of FIG.
【図３】図１のX2−X2線拡大断面図である。FIG. 3 is an enlarged sectional view taken along line X2-X2 of FIG.
【図４】図１のX3−X3線拡大断面図である。FIG. 4 is an enlarged sectional view taken along line X3-X3 of FIG.
【図５】被叩打部材の他例を示す側面図である。FIG. 5 is a side view showing another example of the hit member.
【図６】第２実施例の素振り練習用具の側面図である。FIG. 6 is a side view of a swinging exercise tool according to a second embodiment.
１ 基台 ４ 支持体 ７ 被叩打部材 ８ 自由端 10 ティ− Ａ 素振り練習用具 Ｂ ボ−ル 1 base 4 support 7 hitting member 8 free end 10 tee A swing practice tool B ball
Claims (2)
体には、合成樹脂材によって弾性曲げ変形可能に形成さ
れてほぼ水平方向に沿って設置される被叩打部材を、バ
ットで叩打される自由端が前記被叩打部材の先端付近に
形成された片持ち状態で結合したことを特徴とする素振
り練習用具。1. A support member, which is vertically displaceable, is struck by a bat with a struck member that is elastically bendable and made of a synthetic resin material and that is installed substantially horizontally. A swinging exercise tool having a free end formed in the vicinity of the tip of the hit member in a cantilevered state.
より縮小された外径を有するほぼ丸棒状に形成したこと
を特徴とする請求項１記載の素振り練習用具。2. The swing-practice exercise tool according to claim 1, wherein the hit member is formed into a substantially round bar shape having an outer diameter reduced from the outer diameter of a ball for baseball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23703495A JPH0975492A (en) | 1995-09-14 | 1995-09-14 | Swing practice device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23703495A JPH0975492A (en) | 1995-09-14 | 1995-09-14 | Swing practice device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0975492A true JPH0975492A (en) | 1997-03-25 |
Family
ID=17009424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23703495A Pending JPH0975492A (en) | 1995-09-14 | 1995-09-14 | Swing practice device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0975492A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007050193A (en) * | 2005-08-19 | 2007-03-01 | Kashiko Seisaku:Kk | Ball feeder |
| JP2007190320A (en) * | 2006-01-23 | 2007-08-02 | Masahito Suzuki | Baseball swing practicing apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4327452Y1 (en) * | 1966-03-23 | 1968-11-13 |
-
1995
- 1995-09-14 JP JP23703495A patent/JPH0975492A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4327452Y1 (en) * | 1966-03-23 | 1968-11-13 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007050193A (en) * | 2005-08-19 | 2007-03-01 | Kashiko Seisaku:Kk | Ball feeder |
| JP2007190320A (en) * | 2006-01-23 | 2007-08-02 | Masahito Suzuki | Baseball swing practicing apparatus |
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