JP3682643B2

JP3682643B2 - Stretching board combined golf practice tool

Info

Publication number: JP3682643B2
Application number: JP18904199A
Authority: JP
Inventors: 幸治松本
Original assignee: 幸治松本
Priority date: 1999-07-02
Filing date: 1999-07-02
Publication date: 2005-08-10
Anticipated expiration: 2019-07-02
Also published as: JP2001009078A

Description

【０００１】
【発明の属する分野】
本発明はゴルフ場におけるコースの如何なる起伏条件にも対応して常に高スコアを出せるように練習するためのゴルフ練習具に係るものである。また、ゴルフスウィングの練習のみならず、ストレッチングボードとしても利用することができる。
【０００２】
【従来の技術】
ほとんどのゴルファーはゴルフコースではなくゴルフ練習場で数多くのボールを打って練習している。練習場では、水平面にボールを置き且つスタンスをとって練習しているために、平坦なコースでのショットには比較的慣れるが、実際のコースにおいて不特定多数の斜面に遭遇したときには、実際の傾斜面での練習を行っていないから巧く打つことができない。
【０００３】
一般的に、ゴルフコースにおいては技術に応じたプレーができるように、バンカーや池などの他、傾斜や凸凹のアンジュレーションが設計されており、ティーグランドを除いて地面が前上がり、前下がり、左上がり、左下がり、右上がり、右下がり等々様々な地形となっており、平坦な場所でショットできる場合は数少ないのが現状である。
【０００４】
従って、練習場での練習のみでは、前記様々な地形に対応した練習をすることはできず、起伏のあるゴルフコースにおいて高スコアを望むことはできないという問題がある。
【０００５】
そこで、今日までにも、前述のごとき起伏条件においても高スコアが出せるよう、斜面を想定した練習をさせる数多くのゴルフ練習具が発明されてきた。
【０００６】
実開昭４８−９７０６２号公報にて開示されている「ゴルフ練習台」は、支持棒および立脚台とから構成されている。支持棒の下方は球面体となっており、球面体の下方には押圧子が、その下方にはカムが設けられており、カムに取り付けられたハンドルによって球面体を任意の方向に動かして立脚台の傾きを調整させるというものである。しかしながら、この「ゴルフ練習台」は、長形の支持棒、球面体、押圧子、カムという多くの中間部材を使用しているため、地面から立脚台までがかなりの高さとなり、プレーヤーが立脚台に乗った場合、安全性の面で問題となる。また、この「ゴルフ練習台」ではボールが置かれる地面からプレーヤーまでの距離が長いために練習できるスイングのバリエーションが限られる。
【０００７】
特開平４−１１７９７１号公報にて開示されている「ゴルフ練習機における打席板傾動装置」は、地面から比較的近い位置で多様な傾斜面を提供でき、安全面でも優れており、実際のゴルフコースに近い状態を再現させる練習装置である。しかしながら、構造が複雑であり、高額とならざるを得ない。また、装置全体が大掛かりで場所をとるため、一般家庭での使用には適していない。
【０００８】
実開昭５９−１２４５６８号公報にて開示されている「傾斜可変式ゴルフ練習台」は、半球体凹面状の台座に半球体凸面状のプレー台を載せた構造であり、両者をボルトで構成される組立部材によって連結させたものである。ボルト頭部は半球体凹面部材の中央下面側に溶着されており、中空のプレー台を貫通して表面板と結合されている。ボルトを弛めると、プレー台の半球体凸面部が台座の半球体凹面部に対して摺動しながら揺動旋回自在となり、ボルトを締めるとこれら半球体凸面と半球面凹面の２面が密接に当接して任意所望の傾斜面が設定されるようになっている。この「傾斜可変式ゴルフ練習台」は構造が簡単であり、安価に製造でき、また場所もとらないので一般家庭での使用にも適している。
【０００９】
しかしながら、ボルトは中空プレー台の表面板上面と台座の半球体凹面部の下面間にわたって挿通されているため、このボルトを締め付ければ各部材が互いに引き寄せられる方向に押圧されて中空プレー台の表面板が陥没する虞がある。さらに溶着されたボルト頭部の面積及び中空プレー台の表面板を押圧するワッシャー面積の何れもが小さいため、ボルト締め付けによる陥没がより一層生じやすい。また、このような中空プレー台の表面板にプレーヤーが足を載せて力強くスイングすれば、表面板には更なる押圧力が加わり表面板の陥没する危険性が一層高くなり、一方挿通されるボルトが長尺であるため繰返し使用による金属疲労によって折れやすいなど、耐久性及び使用時の安全性確保の点で問題がある。
【００１０】
この場合陥没という問題を防止するには、プレー台に中空部を設けない、つまりプレー台の中空部を同質部材や異質部材で埋める方法、或いはプレー台の表面板と台座の半球体凹面部の材質を鋼鉄製その他の硬質材とする方法、さらには長尺なボルトを太くするなどが考えられるが、何れも重量が増加し或いは形成材料の増加によるコストアップへとつながるため家庭用、個人用、そして簡単軽量な練習具とはなり得ない。
【００１１】
特開平６−４７１２０号公報記載の「ゴルフショット練習用足載置台」は、あらかじめ斜面角度が固定されているので、任意の斜面を形成することができない。
【００１２】
【発明が解決しようとする課題】
従って、ゴルフ練習場や一般家庭で手軽に使用でき、簡単な構造で、安価に製造でき、且つ安全性や使用効果が高いゴルフ練習具の提供が望まれる。また、ゴルフスイングの練習のみならず、スイング練習前のストレッチ運動にも応用できるものであればさらに便利である。
【００１３】
【課題を解決するための手段】
本発明によって提供されるゴルフ練習具は第１支承球面部を備えた底板と、第２支承球面部を備えた略円形の天板と、第１支承球面部の裏面に配置された球面状の締付部材と、天板と締付部材とを連結する連結部材とを有している。
【００１４】
第１支承球面部は、底板の略中央が略球面凸状に盛り上がった部分であり、この盛り上がった球面の中央には、天板が第２支承球面部を介して底板の第１支承球面部に対して摺動可能となるべく適度の略円形の”切欠部”（あそび）が提供されている。この切欠部内に天板と底板とを連結するボルトなどの連結部材が挿通されて自由に動けるので、第１支承球面部と第２支承球面部とを任意の方向に摺動させることができる。第１支承球面部の球面の凸形状は天板の第２支承球面部の球面凹形状と整合するようになっている。
【００１５】
第２支承球面部は天板の略中央が略球面凹状に形成された部分であり、この第２支承球面部の凹形状とは、前記第１支承球面部の凸形状と互いに重なり合う形状となっている。
【００１６】
締付部材は、第１支承球面部の裏面に配置されており、第１支承球面部に沿って対応する球面状に形成されている。連結部材は、天板と締付部材とを連結するものである。この連結部材を締めると、第１支承球面部と締付部材が当接し、第１支承球面部、第２支承球面部及び締付部材が３重重ねになって相互に締め付けられて密接する。
【００１７】
本発明の「ゴルフ練習具」は、天板及び底板の厚みを薄くすることができ、また、第１支承球面部及び第２支承球面部の球面の湾曲度合いもなだらかに形成することができるので、地面から足載せ台まで相当の高さとなることはなく、安全に練習をすることができる。
【００１８】
本発明の「ゴルフ練習具」は、半球体の上に天板を載せた、単純でコンパクトな構造のものである。したがって、特開平４−１１７９７１号公報のような、構造が複雑で大ががりとはならず、安価に製造することができ、家庭やゴルフ練習場で手軽に使用することができる。
【００１９】
本発明の「ゴルフ練習具」は、部品の締め付けが、第１支承球面部、第２支承球面部及び締付部材という広い面積を持った部材の３重構造によって提供されている。したがって、広い面積で大きな摩擦抵抗力によって、天板の傾斜が極めて強固に固定され、使用時の安全が確保される。ボルトによる締付力は互いの支承球面部に向かう。よって、実開昭５９−１２４５６８号公報のように、締付部材（ボルト）の溶着がプレー台（板）中央位置の極めて狭い面積内になされ、且つそのボルトが中空状態のプレー台を貫通する構造とはなっておらず、プレーヤーが天板に乗っても体重がボルトに集中することがない。このため、天板がプレーヤーの体重の重さで破損したり、ボルトが天板に陥没したり、あるいは途中で折れたりすることもない。
【００２０】
本発明の「ゴルフ練習具」は、底板の第１支承球面部の中央に略円形の切欠部（あそび）が提供されている。この切欠部内を連結部材（ボルト）が貫通し、切欠部内を自由に動く構造であり、連結部材に取り付けられている天板も自由に動いて任意所望の方向及び角度に傾斜する。所望の傾斜角度となった天板は連結部材（ボルト）によって固定される。従って、特開平６−４７１２０号公報のように、あらかじめ傾斜角度が設定されておらず、自由な傾斜が提供される。また、「ねじり傾斜（左右傾斜のつま先上がりやつま先下がりの傾斜）」も簡単につくることができる。
【００２１】
【発明の実施の形態】
以下、本発明にかかる「ストレッチボード兼用ゴルフ練習具」について添付の図を利用して説明する。
【００２２】
図１において示されるように、本発明に係る「ストレッチボード兼用ゴルフ練習具」は、第１支承球面部１を備えた底板３と、第２支承球面部２を備えた略円形の天板４と、天板４と球面状の締付部材５とを連結する連結部材６と、第１支承球面部１の裏面に配置された締付部材５とを有している。連結部材６は、天板４と締付部材５とをつなぐ状態で提供されている。第１支承球面部の中央には略円形の切欠部１０が提供されており、連結部材はこの切欠部１０内部で自由に動く。、本実施例においては、底板３は直径約４０センチメートルの円盤状に形成されており、第１支承球面部１の直径は約１８センチメートル、高さは約３センチメートルである。切欠部１０の直径は約６センチメートルとなっている。略円形の天板４は直径約４０センチメートルであり、第２支承球面部２は、第１支承球面部１に対応して重なる半球形に形成されている。球面状の締付部材５は直径約１２センチメートルの半球形状であって、第１支承球面部１の裏面に配置される。球面状の締付部材５は第１支承球面部１の半円形に重なる形状に形成されている。この天板４及び底板５の素材は本実施例においてはプラスチックが使用されている。連結部材６は全長約３センチメートルのボルトが使用されている。
【００２３】
第１支承球面部１または第２支承球面部２とは摺動可能に当接する。つまり、第１支承球面部１の中央に提供されている切欠部１０内を連結部材６が貫通しており、切欠部１０内を自由に動く。このため、第１支障球面部１と第２支承球面部２とを任意の方向に摺動させることができる。
【００２４】
連結部材６を締め付けると、第１支承球面部１の裏面に配置された締付部材５が第１支承球面部１に当接し、第１支承球面部１、第２支承球面部２そして球面状の締付部材５とが３重に重なり合った連結面部を成した状態で互いに締め付けられて密接し、略円形の天板４が任意の方向に傾斜角度をもって固定されるのである。
【００２５】
本実施例においては、連結部材６は、天板４のほぼ中心に固着され、天板４を貫通し、第１支承球面部１中央の切欠部１０内を通り抜け、球面状の締付部材５と固着される状態に提供されている。この状態で連結部材６を締め付けた場合、締め付けの力は互いの支承球面部に向かってかかり、且つこれらの締め付けが広い面積を有する部材によってなされるので、各部材の摩擦抵抗力によって傾斜角度の固定が極めて強固に提供される。この方法によれば、天板４にプレーヤーが乗った際にも体重がボルト（連結部材６）に集中してかかることはなく、ボルトが折れる虞がない。
【００２６】
図４は、本発明にかかる「ストレッチングボード兼用ゴルフ練習具」の第２実施例を表している。本実施例において、第１支承球面部１’、第２支承球面部２’及び締付部材５’のうち、互いに当接する少なくともひとつの当接面部が凸凹状に形成されている。
【００２７】
本実施例においては、凸部は連続する山状突起Aに、凹部は格子状の溝Bに形成されており、凸部の山状突起Aが凹部の溝Bに填め込まれる。連結部材６’を締め付けると、これらの当接面部の凸凹部が互いに嵌合係止するようになっている。
【００２８】
山状突起Aを第２支承球面部２’に、格子状の溝Ｂを第１支承球面部１’に設けて第１支承球面部１’及び第２支承球面部２’の組を互いに嵌合係止（かみ合う）させることもできる。一方、締付部材５’に山状突起Ａを設け、第１支承球面部１’の裏面に格子状の溝Ｂを設けて第１支承球面部１’及び締付部材５’の組を互いに嵌合係止させることもできる。このように、部材の嵌合係止はいずれか１組の組み合わせのみであってもよく、或いは２組の組み合わせとすることもできる。
【００２９】
これら当接面部が凸凹状に形成されていることにより、各部材の係止がさらに強固になされる。天板の傾斜角度が一層強固に固定されて、使用時の安全性が確保される。
【００３０】
図６は、本発明にかかる「ストレッチングボード兼用ゴルフ練習具」の第３実施例を図示している。本実施例においては、第１支承球面部１”、第２支承球面部２”及び締付部材５”のうち、互いに当接するひとつの当接面部の一方に突起体Cが設けられ、他方に嵌合孔Dが設けられている。つまり、第１支承球面部１”の表面に複数の突起体C が、第２支承球面部２”の表面に複数の嵌合孔Dが設けられており、連結部材６”が締め付けられると、これら突起体Cと嵌合孔Dとは嵌合係止する。これら当接面部が嵌合係止することにより、各部材の係止がさらに強固になされて、天板の傾斜角度がさらに強固に固定されて、使用時の安全性が確保される。
【００３１】
突起体Ｃと嵌合孔Ｄの嵌合係止は、前述の山状突起Aと格子状の溝Ｂの如く、部材の嵌合係止はいずれか１組の組み合わせのみであってもよく、或いは２組の組み合わせとすることもできる。
【００３２】
図７及び図８は、本発明にかかる「ストレッチングボード兼用ゴルフ練習具」の第４実施例を図示している。本実施例において、第１支承球面部１、第２支承球面部２及び締付部材５の３重構造によって成される連結面部が、略円形の天板４の中心軸外に設けられている。図７及び図８にて示されるように、連結面部を天板４の中心軸外に設けることで天板４の中心に連結面部を設けたときよりも、さらに多様な傾斜角度を形成することができる。図７に図示された本発明の第４実施例にかかる「ゴルフ練習具」は、その連結面部が天板４の中心からやや右寄りに外れた位置に置かれている。この場合、図示のごとく、天板４を左に傾斜させた状態で固定すれば比較的浅い角度の傾斜を作ることができる。反対に図８に示されるように、やや急な傾斜を作りたいときは右に傾斜させるのである。このように、連結面部を天板４の中心からずらして設けることで、様々な場面を想定した傾斜角度を容易に作ることができる。
【００３３】
なお、本発明は上記の実施の形態に限られるものではない。
【００３４】
底板の形状は実施例に記載の円盤状に限られず、四角形や楕円形などその他本発明の実施が可能である形状であればよい。第１支承球面部及び第２支承球面部の半球形の大きさ、締付部材の大きさ及び形状、切欠部の大きさは実施例に記載されたものに限られず、本発明の目的を達成できる形状、大きさであればよい。連結部材も実施例のボルトに限られず、その他連結機能を発揮することができるあらゆる部材の適用が考えられる。本発明においては連結部材自体に強い圧力がかからないため、連結部材を金属とせずとも、例えば、プラスチックや木等の「ゴルフ練習具」本体と同じ素材で形成することもできる。本発明にかかる「ゴルフ練習具」の素材も実施例において示されるプラスチックに限定されない。また、天板の表面に人工芝、ゴム、布などの素材を張り付けて滑り止め効果を持たせたり、実際の芝生に近い状態で練習させることもできる。底板の裏面に滑り止めを設けて一層安全性を高めることもできる。
【００３５】
【発明の効果】
請求項１に記載の「ストレッチングボード兼用ゴルフ練習具」は、第１支承球面部を備えた底板と、第２支承球面部を備えた略円形の天板と、第１支承球面部の裏面に配置された球面状の締付部材と、天板と締付部材とを連結する連結部材と、を有したゴルフ練習具であって、第１支承球面部と第２支承球面部とは摺動可能に当接するとともに、連結部材を締め付けたときに、締付部材が第１支承球面部に当接することにより、第１支承球面部と第２支承球面部と締付部材とが３重重ね状に密着し、天板が任意の方向に傾斜角度をもって固定される、ことを特徴としている。よって、連結部材を締め付けた場合、締め付けの力は互いの支承球面部に向かってかかり、且つこれらの締め付けが広い面積を有する部材の３重重ねによってなされるので、各部材の大きな摩擦抵抗力によって傾斜角度の固定を極めて強固に行うことができる。
【００３６】
一方、ボルト等の連結部材は天板と台座間にわたって挿通されておらず、第１支承球面部と第２支承球面部と締付部材の各部材間でのみ締め付けが行われ、これらの部材間には第１支承球面部に設けられた空間部（切欠部）のみが形成されていることから、ボルト等の連結部材の長さは極めて短くて済み、またボルト締め付けによる陥没が生じにくく、特には連結部材を締め付けても天板の上面が底板に引き寄せられて陥没するといった不都合が生じない。よってプレーヤーが足を載せて力強くスイングしても天板が陥没する或いはボルト等の連結部材が破損するといった危険性が減少する。そして材質を鋼鉄等の硬質材とすること無く耐久性を向上せしめ、重量及びコストを軽減させることができ、家庭用、個人用、そして簡単軽量な練習具を提供することができる。
【００３７】
請求項２に記載の「ストレッチングボード兼用ゴルフ練習具」は、第１支承球面部、第２支承球面部及び締付部材のうち、互いに当接する少なくともひとつの当接面部が、連続する山状突起と格子状の溝の組み合わせの様な凸凹状に形成されており、連結部材を締め付けた際に、これら両当接面部が互いに嵌合係止することを特徴としている。当接面部が凸凹形成されているので両当接面部が互いに嵌合状態で係止される。よって各部材の係止がさらに強固に提供されることとなり、天板の傾斜角度がさらに強固に固定され、使用時の安全を確保することができる。
【００３８】
請求項３に記載の「ストレッチングボード兼用ゴルフ練習具」は、第１支承球面部、第２支承球面部及び締付部材のうち、当接面部の一方に複数の突起体が設けられ、他方にこれらの突起体を受ける複数の嵌合孔が設けられており、連結部材を締め付けた際に、突起体と嵌合孔とが嵌合係止することを特徴としている。突起体が嵌合孔に嵌合されて係止することにより、各部材の係止がさらに強固になされる。したがって、天板の傾斜角度がさらに強固に固定され、使用時の安全を確保することができる。
【００３９】
請求項４に記載の「ストレッチングボード兼用ゴルフ練習具」は、連結面部が、略円形の天板の中心軸外に設けられていることを特徴としている。よって、天板の中心に連結面部を設けたときよりも、一層多様な傾斜角度を形成することができ、様々な場面を想定した練習をすることができる。
【００４０】
また、本発明は、天板の上に両足を載せて、「ストレッチングボード」として活用することもできる。天板はあらゆる方向、角度に固定することができるので、様々な形態でのストレッチング運動ができる。
【００４１】
本発明は、基本的には片足を載せて使用するものであるが、両足を載せて練習することもできる。また、２つを使用して、それぞれに片足ずつを載せて使用すれば更に効果が上がる。
【図面の簡単な説明】
【図１】本発明にかかる「ストレッチングボード兼用ゴルフ練習具」（第１実施例）の断面図である。
【図２】本発明にかかる「ストレッチングボード兼用ゴルフ練習具」（第１実施例）の斜視図である。
【図３】本発明にかかる「ストレッチングボード兼用ゴルフ練習具」（第１実施例）の上面図である。
【図４】本発明にかかる「ストレッチングボード兼用ゴルフ練習具」（第２実施例）の断面図である。
【図５】本発明にかかる「ストレッチングボード兼用ゴルフ練習具」（第２実施例）の斜視図である。
【図６】本発明にかかる「ストレッチングボード兼用ゴルフ練習具」（第３実施例）の断面図である。
【図７】本発明にかかる「ストレッチングボード兼用ゴルフ練習具」（第４実施例）の斜視図である。
【図８】本発明にかかる「ストレッチングボード兼用ゴルフ練習具」（第４実施例）の斜視図である。
【符号の説明】
１第１支承球面部
２第２支承球面部
３底板
４略円形の天板
５球面状の締付部材
６連結部材
１０切欠部（あそび）
１’ 第１支承球面部
２’ 第２支承球面部
５’ 球面状の締付部材
６’ 連結部材
A 山状突起
B 格子状の溝
１” 第１支承球面部
２” 第２支承球面部
５” 球面状の締付部材
６” 連結部材
Ｃ突起体
Ｄ嵌合孔[0001]
[Field of the Invention]
The present invention relates to a golf practice tool for practicing so as to always give a high score corresponding to any undulation condition of a course in a golf course. Moreover, it can be used not only for golf swing practice but also as a stretching board.
[0002]
[Prior art]
Most golfers are practicing by hitting a lot of balls at the driving range instead of the golf course. In the practice field, the ball is placed on a horizontal surface and practiced with a stance, so it is relatively familiar to shots on a flat course, but when an unspecified number of slopes are encountered in an actual course, I can't hit well because I don't practice on slopes.
[0003]
Generally, golf courses are designed with undulations such as bunker and pond, as well as bunker, pond, etc., so that the ground rises forward and lowers except the tee ground, There are various topographic features such as left-up, left-down, right-up, right-down, etc., and there are few cases where you can shot on a flat place.
[0004]
Accordingly, there is a problem that it is not possible to practice corresponding to the above various terrain only by practice at the practice field, and it is not possible to desire a high score on a undulating golf course.
[0005]
Thus, to date, a number of golf practice tools have been invented to practice on the assumption of slopes so that a high score can be obtained even under the undulating conditions as described above.
[0006]
The “golf practice table” disclosed in Japanese Utility Model Publication No. 48-97062 is composed of a support bar and a stand. Below the support bar is a spherical body, a presser is provided below the spherical body, and a cam is provided below the spherical body. The spherical body is moved in any direction by a handle attached to the cam, and the stance leg is The tilt of the table is adjusted. However, since this "golf practice base" uses many intermediate members such as a long support bar, spherical body, presser, and cam, the height from the ground to the stand is quite high, and the player can stand on the stand. If you get on the table, it becomes a problem in terms of safety. Further, in this “golf practice table”, variations in swing that can be practiced are limited because the distance from the ground on which the ball is placed to the player is long.
[0007]
Japanese Laid-Open Patent Publication No. 4-117971 discloses a “batting board tilting device for a golf practice machine” that can provide various inclined surfaces at positions relatively close to the ground, and is excellent in terms of safety. It is a practice device that reproduces the state close to the course. However, the structure is complicated and it must be expensive. In addition, since the entire apparatus is large and takes up space, it is not suitable for use in ordinary homes.
[0008]
The "tilt variable golf practice table" disclosed in Japanese Utility Model Publication No. 59-124568 is a structure in which a hemispherical convex play table is mounted on a hemispherical concave base, and both are constituted by bolts. Connected by an assembled member. The bolt head is welded to the center lower surface side of the hemispherical concave member, and is joined to the surface plate through the hollow play table. When the bolt is loosened, the convex surface of the hemisphere of the playing table can swing and swing while sliding with respect to the concave surface of the hemisphere of the pedestal. Any desired inclined surface is set by contact. This "tilt-variable golf practice table" has a simple structure, can be manufactured at a low cost, and is suitable for use in ordinary homes because it does not require a place.
[0009]
However, since the bolt is inserted between the upper surface plate of the hollow play table and the lower surface of the concave part of the hemisphere of the pedestal, if the bolt is tightened, the members are pressed in the direction in which they are pulled toward each other and The face plate may sink. Furthermore, since both the welded bolt head area and the washer area that presses the surface plate of the hollow play table are small, depression due to bolt tightening is more likely to occur. In addition, if a player puts his / her feet on the surface plate of such a hollow play table and swings powerfully, the surface plate is further pressed and the risk of the surface plate falling is further increased. Is long and has a problem in terms of durability and ensuring safety during use, such as being easily broken by metal fatigue due to repeated use.
[0010]
In this case, in order to prevent the problem of depression, a hollow part is not provided in the play table, that is, a method in which the hollow part of the play table is filled with a homogeneous member or a heterogeneous member, or the surface plate of the play table and the hemispherical concave part of the base It is conceivable to use steel or other hard materials as the material, and thicker long bolts. However, both increase the weight or increase the cost due to the increase in forming materials, so that it can be used at home and for personal use. And it cannot be a simple and lightweight exercise tool.
[0011]
In the “golf shot practice footrest” described in Japanese Patent Application Laid-Open No. 6-47120, the slope angle is fixed in advance, so that an arbitrary slope cannot be formed.
[0012]
[Problems to be solved by the invention]
Therefore, it is desired to provide a golf practice tool that can be easily used at a driving range or a general home, can be manufactured at a low cost with a simple structure, and has high safety and use effect. Moreover, it is more convenient if it can be applied not only to golf swing practice but also to stretching exercise before swing practice.
[0013]
[Means for Solving the Problems]
A golf practice tool provided by the present invention has a bottom plate having a first support spherical surface portion, a substantially circular top plate having a second support spherical surface portion, and a spherical surface disposed on the back surface of the first support spherical surface portion. A fastening member and a connecting member for connecting the top plate and the fastening member are provided.
[0014]
The first support spherical surface portion is a portion where the substantially center of the bottom plate is raised in a substantially spherical convex shape, and the top plate is located at the center of the raised spherical surface via the second support spherical surface portion. A moderately circular “notch” (play) is provided so as to be slidable with respect to. Since a connecting member such as a bolt for connecting the top plate and the bottom plate is inserted into the notch and can freely move, the first supporting spherical portion and the second supporting spherical portion can be slid in an arbitrary direction. The convex shape of the spherical surface of the first supporting spherical surface portion is matched with the spherical concave shape of the second supporting spherical surface portion of the top plate.
[0015]
The second support spherical surface portion is a portion in which the substantially center of the top plate is formed in a substantially spherical concave shape. The concave shape of the second support spherical surface portion is a shape that overlaps the convex shape of the first support spherical surface portion. ing.
[0016]
The fastening member is disposed on the back surface of the first support spherical surface portion, and is formed in a corresponding spherical shape along the first support spherical surface portion. The connecting member connects the top plate and the fastening member. When the connecting member is tightened, the first support spherical surface portion and the tightening member come into contact with each other, and the first support spherical surface portion, the second support spherical surface portion, and the tightening member are overlapped with each other and are in close contact with each other.
[0017]
In the “golf practice tool” of the present invention, the thickness of the top plate and the bottom plate can be reduced, and the curvature degree of the spherical surfaces of the first support spherical surface portion and the second support spherical surface portion can be formed smoothly. , You can practice safely without the height from the ground to the footrest.
[0018]
The “golf practice tool” of the present invention has a simple and compact structure in which a top plate is placed on a hemisphere. Therefore, as disclosed in JP-A-4-117971, the structure is not complicated and large, and can be manufactured at low cost, and can be easily used at home or at a golf driving range.
[0019]
In the “golf practice tool” of the present invention, components are fastened by a triple structure of members having a large area of a first support spherical surface portion, a second support spherical surface portion, and a tightening member. Therefore, the inclination of the top plate is fixed extremely firmly by a large frictional resistance force over a wide area, and safety during use is ensured. The tightening force by the bolts is directed toward each other's bearing spherical surface. Therefore, as in Japanese Utility Model Laid-Open No. 59-124568, the fastening member (bolt) is welded within an extremely small area at the center position of the play table (plate), and the bolt penetrates through the hollow play table. It is not structured, and the weight does not concentrate on the bolt even if the player gets on the top board. For this reason, the top plate is not damaged by the weight of the player, the bolt does not sink into the top plate, or breaks in the middle.
[0020]
In the “golf practice tool” of the present invention, a substantially circular notch (play) is provided at the center of the first support spherical surface portion of the bottom plate. A connecting member (bolt) passes through the notch and moves freely in the notch. The top plate attached to the connecting member also freely moves and tilts in any desired direction and angle. The top plate having a desired inclination angle is fixed by a connecting member (bolt). Therefore, unlike Japanese Patent Laid-Open No. 6-47120, a tilt angle is not set in advance, and a free tilt is provided. In addition, a “torsional inclination (tilting with a toe that is tilted to the left or right or tilting a toe)” can be easily created.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a “stretch board combined golf practice tool” according to the present invention will be described with reference to the accompanying drawings.
[0022]
As shown in FIG. 1, a “stretch board combined golf practice tool” according to the present invention includes a bottom plate 3 having a first support spherical surface portion 1 and a substantially circular top plate 4 having a second support spherical surface portion 2. And a connecting member 6 that connects the top plate 4 and the spherical tightening member 5, and a tightening member 5 disposed on the back surface of the first support spherical surface portion 1. The connecting member 6 is provided in a state where the top plate 4 and the fastening member 5 are connected. A substantially circular notch 10 is provided at the center of the first bearing spherical surface, and the connecting member moves freely within the notch 10. In this embodiment, the bottom plate 3 is formed in a disk shape having a diameter of about 40 centimeters, and the diameter of the first support spherical surface portion 1 is about 18 centimeters and the height is about 3 centimeters. The diameter of the notch 10 is about 6 centimeters. The substantially circular top plate 4 has a diameter of about 40 centimeters, and the second support spherical surface portion 2 is formed in a hemispherical shape corresponding to the first support spherical surface portion 1. The spherical fastening member 5 has a hemispherical shape with a diameter of about 12 centimeters, and is disposed on the back surface of the first bearing spherical surface portion 1. The spherical fastening member 5 is formed in a shape overlapping the semicircular shape of the first support spherical surface portion 1. The material of the top plate 4 and the bottom plate 5 is plastic in this embodiment. The connecting member 6 is a bolt having a total length of about 3 centimeters.
[0023]
The first support spherical surface portion 1 or the second support spherical surface portion 2 abuts slidably. In other words, the connecting member 6 passes through the notch 10 provided at the center of the first support spherical surface portion 1, and freely moves in the notch 10. For this reason, the 1st obstruction spherical surface part 1 and the 2nd support spherical surface part 2 can be slid to arbitrary directions.
[0024]
When the connecting member 6 is tightened, the fastening member 5 disposed on the back surface of the first support spherical surface portion 1 comes into contact with the first support spherical surface portion 1, and the first support spherical surface portion 1, the second support spherical surface portion 2, and the spherical shape. The fastening members 5 are fastened to each other in a state where they form a connecting surface portion that overlaps with each other, and the substantially circular top plate 4 is fixed at an inclination angle in an arbitrary direction.
[0025]
In this embodiment, the connecting member 6 is fixed to substantially the center of the top plate 4, passes through the top plate 4, passes through the notch 10 at the center of the first support spherical surface portion 1, and has a spherical fastening member 5. And is provided in a fixed state. When the connecting member 6 is tightened in this state, the tightening force is applied toward the supporting spherical surface portions, and the tightening is performed by members having a large area. Fixing is provided very firmly. According to this method, even when the player gets on the top board 4, the weight is not concentrated on the bolt (the connecting member 6), and the bolt is not broken.
[0026]
FIG. 4 shows a second embodiment of the “stretching board combined golf practice tool” according to the present invention. In the present embodiment, at least one abutting surface portion that abuts each other among the first supporting spherical surface portion 1 ′, the second supporting spherical surface portion 2 ′, and the fastening member 5 ′ is formed in an uneven shape.
[0027]
In this embodiment, the convex portion is formed in a continuous mountain-shaped projection A and the concave portion is formed in a lattice-shaped groove B, and the convex portion of the convex-shaped projection A is fitted in the groove B of the concave portion. When the connecting member 6 ′ is tightened, the convex and concave portions of these contact surface portions are fitted and locked together.
[0028]
A mountain-shaped protrusion A is provided on the second support spherical surface portion 2 ', and a lattice-shaped groove B is provided on the first support spherical surface portion 1' so that the set of the first support spherical surface portion 1 'and the second support spherical surface portion 2' are fitted to each other. It can also be engaged (engaged). On the other hand, a mountain-shaped protrusion A is provided on the tightening member 5 ′, and a lattice-like groove B is provided on the back surface of the first support spherical surface portion 1 ′ so that the first support spherical surface portion 1 ′ and the tightening member 5 ′ are joined together. It can also be fitted and locked. Thus, the fitting engagement of the members may be only one combination, or may be two combinations.
[0029]
Since these contact surface portions are formed in an uneven shape, the locking of each member is further strengthened. The tilt angle of the top plate is more firmly fixed, and safety during use is ensured.
[0030]
FIG. 6 shows a third embodiment of the “stretching board combined golf practice tool” according to the present invention. In this embodiment, one of the first bearing spherical surface portion 1 ″, the second bearing spherical surface portion 2 ″, and the tightening member 5 ″ is provided with a protrusion C on one of the contact surface portions that are in contact with each other. A fitting hole D is provided, that is, a plurality of protrusions C are provided on the surface of the first support spherical surface portion 1 ", and a plurality of fitting holes D are provided on the surface of the second support spherical surface portion 2". When the connecting member 6 ″ is tightened, the protrusion C and the fitting hole D are fitted and locked. When these contact surface portions are fitted and locked, the locking of each member is further strengthened, the inclination angle of the top plate is further firmly fixed, and safety in use is ensured.
[0031]
The engagement locking of the protrusion C and the fitting hole D may be only one combination of the engagement locking of the members, such as the above-described mountain-shaped protrusion A and lattice-shaped groove B, Or it can also be set as a combination of two sets.
[0032]
7 and 8 show a fourth embodiment of the “stretching board combined golf practice tool” according to the present invention. In this embodiment, the connecting surface portion formed by the triple structure of the first supporting spherical surface portion 1, the second supporting spherical surface portion 2 and the fastening member 5 is provided outside the central axis of the substantially circular top plate 4. . As shown in FIG. 7 and FIG. 8, by providing the connecting surface portion outside the central axis of the top plate 4, various inclination angles can be formed as compared with the case where the connecting surface portion is provided at the center of the top plate 4. Can do. The “golf practice tool” according to the fourth embodiment of the present invention illustrated in FIG. 7 is placed at a position where the connecting surface portion is slightly off the right side from the center of the top plate 4. In this case, as shown in the drawing, if the top plate 4 is fixed in a state of being tilted to the left, a relatively shallow angle can be formed. On the other hand, as shown in FIG. 8, when a slightly steep slope is desired, the slope is tilted to the right. In this way, by providing the connecting surface portion so as to be shifted from the center of the top plate 4, it is possible to easily make inclination angles assuming various scenes.
[0033]
The present invention is not limited to the above embodiment.
[0034]
The shape of the bottom plate is not limited to the disk shape described in the embodiments, and may be any shape that can implement the present invention, such as a quadrangle or an ellipse. The hemispherical size of the first supporting spherical surface portion and the second supporting spherical surface portion, the size and shape of the fastening member, and the size of the notch portion are not limited to those described in the embodiments, and the object of the present invention is achieved. Any shape and size can be used. The connecting member is not limited to the bolt of the embodiment, and any other member that can exhibit a connecting function can be considered. In the present invention, since a strong pressure is not applied to the connecting member itself, the connecting member may be formed of the same material as the “golf practice tool” main body such as plastic or wood without using a metal. The material of the “golf practice tool” according to the present invention is not limited to the plastic shown in the examples. You can also apply materials such as artificial grass, rubber, or cloth to the top of the table to give it a non-slip effect, or practice it in a state close to the actual lawn. It is possible to further enhance safety by providing a slip stopper on the back surface of the bottom plate.
[0035]
【The invention's effect】
The "stretching board combined golf practice tool" according to claim 1 includes a bottom plate having a first support spherical surface portion, a substantially circular top plate having a second support spherical surface portion, and a back surface of the first support spherical surface portion. And a connecting member for connecting the top plate and the tightening member, wherein the first support spherical surface portion and the second support spherical surface portion are slid. When the coupling member is tightened, the first support spherical surface portion, the second support spherical surface portion, and the tightening member are stacked three times by the contact of the tightening member with the first support spherical surface portion. The top plate is fixed at an inclination angle in an arbitrary direction. Therefore, when the connecting member is tightened, the tightening force is applied toward the supporting spherical surface portions, and since these tightening is performed by three layers of members having a large area, the large frictional resistance force of each member The inclination angle can be fixed extremely firmly.
[0036]
On the other hand, connecting members such as bolts are not inserted between the top plate and the pedestal, and tightening is performed only between the first supporting spherical surface portion, the second supporting spherical surface portion, and the tightening member. Since only the space portion (notch portion) provided in the first support spherical surface portion is formed, the length of the connecting member such as a bolt can be extremely short, and depression due to bolt tightening is unlikely to occur. Even if the connecting member is tightened, there is no inconvenience that the top surface of the top plate is drawn to the bottom plate and sinks. Therefore, even if the player puts his foot on and swings strongly, the risk that the top plate will collapse or the connecting member such as a bolt will be damaged is reduced. Further, durability can be improved without using a hard material such as steel, and the weight and cost can be reduced. Thus, it is possible to provide household, personal, and simple lightweight exercise tools.
[0037]
The “stretching board combined golf practice tool” according to claim 2 is a mountain shape in which at least one abutting surface portion that abuts each other among the first supporting spherical surface portion, the second supporting spherical surface portion, and the tightening member is continuous. It is formed in an uneven shape such as a combination of a projection and a lattice-like groove, and when the connecting member is tightened, both contact surface portions are fitted and locked together. Since the contact surface portions are uneven, both contact surface portions are locked in a fitted state. Therefore, the locking of each member is provided more firmly, the inclination angle of the top plate is more firmly fixed, and safety during use can be ensured.
[0038]
The "stretching board combined golf practice tool" according to claim 3 is provided with a plurality of protrusions on one of the contact surface portions of the first support spherical surface portion, the second support spherical surface portion, and the tightening member, A plurality of fitting holes for receiving these protrusions are provided, and when the connecting member is tightened, the protrusions and the fitting holes are fitted and locked. When the protrusion is fitted into the fitting hole and locked, the locking of each member is further strengthened. Therefore, the inclination angle of the top plate is more firmly fixed, and safety during use can be ensured.
[0039]
The “stretching board combined golf practice tool” according to claim 4 is characterized in that the connecting surface portion is provided outside the central axis of the substantially circular top plate. Therefore, it is possible to form a wider variety of inclination angles than when the connecting surface portion is provided at the center of the top board, and it is possible to practice various scenes.
[0040]
The present invention can also be utilized as a “stretching board” by placing both feet on a top board. Since the top plate can be fixed in any direction and angle, stretching exercises in various forms are possible.
[0041]
The present invention is basically used with one foot on, but can be practiced with both feet on. In addition, if two are used and one leg is placed on each, the effect is further improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a “stretching board combined golf practice tool” (first embodiment) according to the present invention.
FIG. 2 is a perspective view of a “stretching board combined golf practice tool” (first embodiment) according to the present invention.
FIG. 3 is a top view of a “stretching board combined golf practice tool” (first embodiment) according to the present invention.
FIG. 4 is a cross-sectional view of a “stretching board combined golf practice tool” (second embodiment) according to the present invention.
FIG. 5 is a perspective view of a “stretching board combined golf practice tool” (second embodiment) according to the present invention.
FIG. 6 is a cross-sectional view of a “stretching board combined golf practice tool” (third embodiment) according to the present invention.
FIG. 7 is a perspective view of a “stretching board combined golf practice tool” (fourth embodiment) according to the present invention.
FIG. 8 is a perspective view of a “stretching board combined golf practice tool” (fourth embodiment) according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st bearing spherical surface part 2 2nd bearing spherical surface part 3 Bottom plate 4 Substantially circular top plate 5 Spherical clamping member 6 Connecting member 10 Notch (play)
1 'first bearing spherical surface portion 2' second bearing spherical surface portion 5 'spherical fastening member 6' connecting member
A chevron
B Lattice-like groove 1 "1st support spherical surface part 2" 2nd support spherical surface part 5 "Spherical tightening member 6" Connecting member C Protrusion D Fitting hole

Claims

A disk-shaped bottom plate having no angle operation member, tightening operation member or other operation member ;
A first support spherical surface portion having a substantially spherical upper surface raised substantially at the center of the upper surface of the bottom plate;
A top plate having a substantially circular flat plate shape that does not have an angle operation member, a tightening operation member, or other operation members and can be inclined so as to come into contact with the bottom plate ;
A second support spherical surface portion that does not protrude toward the lower surface side of the top plate, and is formed in a substantially spherical concave shape at the center of the bottom surface of the top plate;
A hemispherical fastening member disposed on the back surface of the first support spherical surface portion and formed into a corresponding spherical shape along the first support spherical surface portion;
A connecting member that passes through the center of the substantially spherical concave second bearing spherical portion that connects the top plate and the fastening member;
A golf practice tool that is used on one leg with
The convex shape of the first supporting spherical surface portion and the concave shape of the second supporting spherical surface portion are formed in a shape that matches and overlaps each other, and these are slidably contacted and when the connecting member is tightened In addition, the tightening member abuts on the first support spherical surface portion, and the first support spherical surface portion and the second support spherical surface portion abut on each other, thereby forming a connecting surface portion in which these members overlap in a triple manner. In this state, they are fastened to each other in close contact with each other, and the top plate is fixed at an inclination angle in an arbitrary direction.
A golf practice tool characterized by that.

Of the first support spherical surface portion, the second support spherical surface portion, and the tightening member, at least one contact surface portion that is in contact with each other is formed in a concavo-convex shape. The golf practice tool according to claim 1, wherein the golf practice tool is fitted and locked.

Of the first support spherical surface portion, the second support spherical surface portion, and the tightening member, a protrusion is provided on one of the contact surface portions, and a fitting hole is provided on the other, so that when the connecting member is tightened, The golf practice tool according to claim 1, wherein the protrusion and the fitting hole are fitted and locked.

The golf practice tool according to any one of claims 1 to 3, wherein the connecting member is provided outside the central axis of the substantially circular top plate.