JP3817134B2

JP3817134B2 - Tool holding structure

Info

Publication number: JP3817134B2
Application number: JP2000393629A
Authority: JP
Inventors: 秀明河辺
Original assignee: カワベ工業株式会社
Priority date: 2000-12-25
Filing date: 2000-12-25
Publication date: 2006-08-30
Anticipated expiration: 2020-12-25
Also published as: JP2002192409A

Description

【０００１】
【発明の属する技術分野】
この発明は、工具の保持構造、特に、回転駆動して用いられる工具を、容易に、しかも、回転駆動軸と同芯に取付け得るようにした工具の保持構造の提供に関する。
【０００２】
【従来の技術】
一般に工具は、工具保持具を用いて、当該工具を回転駆動軸側に連結するように備え付けて用いるようにしてあり、この工具を工具保持具に対してねじ付けたり、コレットチャックに差し入れた当該工具のシャンクを締め付けカラーで締めつけるなど、当該工具を工具保持具に対して所定の止め付け操作によって、備え付けて用いるようにしていた。
【０００３】
【発明が解決しようとする課題】
しかしながら、かかる工具の工具保持具に対する止め付け操作は、当該工具を工具保持具に対して、例えば、当該工具に備えられている螺子ロッドを工具保持具に備えられている取付け螺子孔にねじ入れたり、当該工具におけるシャンクをコレットチャックに差入れた後、該コレットチャックの締め付けカラーをねじ回すなど、所要の止め付け操作が必要とされ、特に、ハンデイタイプの電動工作用具などにおいて工具を取り替える場合、この電動工作用具を一方の手で保持しながら、他方の手で、当該工具の取り替えを行う必要があり、当該工具の円滑な取り替えに難があった。
【０００４】
また、工具保持具に対してねじ付けて備えられる工具を回転駆動して用いる各種装置類にあっては、この工具保持具に対する工具のねじ込みの向きと反対の向きに当該工具を回転駆動して用いた場合、ねじ込み備え付けられた当該工具が、その使用に伴って緩み出す不具合があった。
【０００５】
この発明は、このような従来の工具の取付けにおける不具合を解消して、容易に、ワンタッチ操作で、しかも、駆動回転軸に対して同芯状態に工具を取付け得ると共に、当該工具をいずれの向きに回転駆動させて用いた場合でも当該取付け工具の取付けに緩み出しを生ずることのない工具の保持構造の提供をその主たる目的としている。
【０００６】
【課題を解決するための手段】
この発明は、前記目的を達成するために、請求項１に記載の発明を、工具保持具が角形嵌合い凹部を備え、且つ工具が前記角形嵌合い凹部に嵌合される角形嵌合い軸部を備えていると共に、
前記角形嵌合い軸部と前記角形嵌合い凹部には、前記工具保持具と前記工具とを該角形嵌合い凹部内に前記角形嵌合い軸部を嵌合することによって係脱可能に係合する係合手段を備えており、
しかも、前記角形嵌合い軸部が、該角形嵌合い軸部の上端面から基部方に向けて円形孔状をなす凹部を備え、
且つ、前記角形嵌合い凹部が、該角形嵌合い凹部の底面から該角形嵌合い凹部内に、前記円形孔状をなす凹部に嵌合されて該凹部と共に前記工具保持具の回転軸線上に前記工具の回転中心線を位置付ける円錐台状をなす嵌合い軸部を突き出すように備えていることを特徴とする工具の保持構造としてある。
【０００７】
このように構成される工具の保持構造にあっては、前記凹部に嵌合い軸部を嵌め入れるように前記角形嵌合い軸部を前記角形嵌合い凹部に嵌合することによって、前記工具と前記工具保持具とが一体に回転するように、前記工具が前記工具保持具に対して着脱可能に取付けられると共に該工具保持具における回転軸線上に当該工具における回転中心線を一致させて当該工具を該工具保持具に取付けることができる。
【０００８】
また、このように構成される工具の保持構造にあっては、当該工具をいずれの向きに回転駆動させて用いた場合でも、当該取付け工具の取付けに緩み出しを生ずることがない。
【００１０】
さらに、このように構成される工具の保持構造にあっては、前記特長に併せて、当該工具の使用に際して当該工具における回転中心線を工具保持具における回転軸線上に極力位置付けるようになすことができる。
【００１１】
また、前記目的を達成するために、請求項２に記載の発明を、前記請求項１に記載の発明において、前記係合手段を、前記角形嵌合い凹部の内壁面から、球体の一部を該角形嵌合い凹部内に突き出すように圧縮コイルバネで付勢されて備えられている係合球体と、前記角形嵌合い軸部の外周面に備えられていると共に前記係合球体が係脱可能に係合される係合凹部としてあることを特徴とする工具の保持構造としてある。
【００１２】
このように構成される工具の保持構造にあっては、前記特長に併せて、前記工具を工具保持具に対して、円滑に取付け且つ取り外すことができる。
【００１３】
また、前記目的を達成するために、請求項３に記載の発明を、前記請求項２に記載の発明において、前記係合球体が、軸方向に操作孔を備えた調整ねじにおける該操作孔内に、球体の一部を該操作孔から前記軸方向に突き出すように圧縮コイルバネで付勢されて備えられていると共に、該調整ねじが前記角形嵌合い凹部の内壁面に開口する雌ねじ孔に螺進退可能に螺入されていることを特徴とする工具の保持構造としてある。
【００１４】
このように構成される工具の保持構造にあっては、前記特長に併せて、前記工具保持具と前記工具とを、都合の良い係合状態に着脱可能に組み付けることができる。
【００１５】
【発明の実施の形態】
以下、この発明の典型的な各実施の形態に係る工具の保持構造について詳細に説明する。
【００１６】
図１〜図６は、典型的な第１の実施の形態に係る工具の保持構造を示したものであり、図１では、その要部部品を分離し且つ工具保持具Ｂの一部を省略して斜め上方から見て、図２では、当該工具の保持構造に係る工具Ａを工具保持具Ｂに取付けた状態を要部を破断して側方から見て、図３では、これを当該工具保持具Ｂの回転軸線に直交する向きで断面して上方から下方側を見て示している。
図４では、当該工具の保持構造を構成する工具保持具Ｂを調整ねじ２６を備え付ける前の状態で要部を断面して側方から見て示している。
図５では、この工具の保持構造を構成する工具Ａを上方から見て、また、図６では、この工具Ａの一部を破断して側方から見て示している。
【００１７】
図７〜図１２は、典型的な第２の実施の形態に係る工具の保持構造を示したものであり、図７では、その要部部品を分離し且つ工具保持具Ｂの一部を省略して斜め上方から見て、図８では、当該工具の保持構造に係る工具Ａを工具保持具Ｂに取付けた状態を要部を破断して側方から見て、図９では、これを当該工具保持具Ｂの回転軸線に直交する向きで断面して上方から下方側を見て示している。
図１０では、当該工具の保持構造を構成する工具保持具Ｂを調整ねじ２６を備え付ける前の状態で要部を断面して側方から見て示している。
図１１では、この工具の保持構造を構成する工具Ａを上方から見て、また、図１２では、この工具Ａの一部を破断して側方から見て示している。
【００１８】
この発明の典型的な実施の形態に係る工具の保持構造は、工具保持具Ｂと工具Ａとが、該工具保持具Ｂと該工具Ａのいずれか一方に角形嵌合い凹部２３を、且つ他方に、前記工具保持具Ｂの回転軸線ｘ−ｘ上に前記工具Ａの回転中心線ｙ−ｙを位置付けるように該角形嵌合い凹部２３に嵌合して前記工具保持具Ｂと前記工具Ａとを一体に回転させる角形嵌合い軸部１２を備えた構成としてあり、この角形嵌合い凹部２３に該角形嵌合い軸部１２を嵌合するように前記工具Ａを工具保持具Ｂに組み付けることによって、当該工具Ａが工具保持具Ｂに対して、この工具保持具Ｂと工具Ａとが一体に回転するように組み付けられる構成としてあり、
しかも、前記角形嵌合い軸部１２と前記角形嵌合い凹部２３には、この角形嵌合い凹部２３内に前記角形嵌合い軸部１２を嵌合することによって前記工具保持具Ｂと前記工具Ａとを係脱可能に係合する係合手段ｋを備えた構成としてあり、当該角形嵌合い凹部２３に嵌合された角形嵌合い軸部１２が該角形嵌合い凹部２３から抜け出さないように当該工具保持具Ｂと工具Ａとが係脱可能に係合される構成としてあり、
しかも、前記工具保持具Ｂと前記工具Ａとが、該工具保持具Ｂと該工具Ａのいずれか一方に凹部１４を、且つ他方に、該凹部１４に嵌合されて該凹部１４と共に前記工具保持具Ｂの回転軸線ｘ−ｘ上に前記工具Ａの回転中心線ｙ−ｙを正確に位置付ける嵌合い軸部２４を備えている構成としてある。
【００１９】
このように構成される工具の保持構造にあっては、前記凹部１４に嵌合い軸部２４を嵌合するように前記角形嵌合い軸部１２を前記角形嵌合い凹部２３に嵌合することによって、前記工具保持具Ｂと前記工具Ａとが一体に回転するように、前記工具Ａが前記工具保持具Ｂに対して着脱可能に取付けられると共に該工具保持具Ｂにおける回転軸線ｘ−ｘ上に当該工具Ａにおける回転中心線ｙ−ｙを一致させて当該工具Ａを該工具保持具Ｂに取付けることができる。
また、このように構成される工具の保持構造にあっては、前記工具保持具Ｂに対する当該工具Ａの組付けが、前記角形嵌合い凹部２３と、この角形嵌合い凹部２３に嵌合される前記角形嵌合い軸部１２相互の各角形面相互の係合による構成としてあることから、当該工具Ａをいずれの向きに回転駆動させて用いた場合にあっても、工具保持具Ｂに対する当該工具Ａの取付けに緩み出しを生ずることがない。
【００２０】
また、前記構成に係る工具の保持構造において、前記角形嵌合い軸部１２が、該角形嵌合い軸部１２の軸中心線ｔ−ｔを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に位置付けるように前記角形嵌合い凹部２３に嵌め合わされると共に、前記嵌合い軸部２４が、該嵌合い軸部２４の軸中心線ｓ−ｓを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に正確に位置付けるように前記凹部１４に対して少なくとも一部を密着して嵌め合わされる構成とすることによって、前記特長に併せて、当該工具Ａの使用に際して当該工具Ａにおける回転中心線ｙ−ｙを工具保持具Ｂにおける回転軸線ｘ−ｘ上に極力位置付けるようになすことができる。
【００２１】
また、前記構成に係る工具の保持構造において、前記係合手段ｋを、前記角形嵌合い凹部２３の内壁面から、その球体の一部を該角形嵌合い凹部２３内に突き出すように圧縮コイルバネ２８で付勢されて備えられる係合球体２７と、前記角形嵌合い軸部１２の外周面に備えられると共に前記係合球体２７が係脱可能に係合される係合凹部１３として構成することによって、
前記特長に併せて、前記角形嵌合い軸部１２を前記角形嵌合い凹部２３内に押し入れ嵌合することによって、この角形嵌合い軸部１２が、その外周面で前記係合球体２７を前記圧縮コイルバネ２８の付勢に抗して押し戻し且つ前記角形嵌合い凹部２３の内方に向けて押し入れられる当該角形嵌合い軸部１２に備えられている前記係合凹部１３に該係合球体２７が該圧縮コイルバネ２８の付勢により入れ込み係合されて、当該工具Ａを前記工具保持具Ｂに係合状態に組み付け得ると共に、
この係合状態にある角形嵌合い軸部１２を前記角形嵌合い凹部２３から引き抜き方向に引くことのみによって、該角形嵌合い軸部１２が前記係合球体２７を前記圧縮コイルバネ２８の付勢に抗して押し戻し、当該係合球体２７の前記係合凹部１３に対する係合を解消して当該工具Ａを前記工具保持具Ｂから取り外すことができる。
【００２２】
また、前記構成に係る工具の保持構造において、前記係合球体２７が、軸方向に操作孔２６ａを備えた調整ねじ２６における該操作孔２６ａ内に、球体の一部を該操作孔２６ａから前記軸方向に突き出すように圧縮コイルバネ２８で付勢されて備えられていると共に、該調整ねじ２６が前記角形嵌合い凹部２３の内壁面に開口する雌ねじ孔２５に螺進退可能に螺入されている構成とすることによって、前記特長に併せて、前記工具保持具Ｂと前記工具Ａとを、都合の良い取付け状態に調整して着脱可能に組み付けることができる。
【００２３】
（１）第１の実施の形態に係る工具の保持構造
先ず、図１〜図６で示される第１の実施の形態に係る工具の保持構造について具体的に説明する。
この第１の実施の形態に係る工具の保持構造は、例えば、回転駆動軸に備えられる工具保持具や、回転駆動軸にチャックなどの各種の保持具によって備えられる工具保持具などのように回転駆動軸部側に備えられる工具保持具Ｂと、該工具保持具Ｂに対して組み付け用いられる工具Ａとが、該工具保持具Ｂと該工具Ａのいずれか一方に角形嵌合い凹部２３を、且つ他方に、その軸中心線ｔ−ｔを前記工具保持具Ｂの回転軸線ｘ−ｘ上又は該回転軸線ｘ−ｘに平行な線上に位置付けると共に前記工具保持具Ｂの回転軸線ｘ−ｘ上に前記工具Ａの回転中心線ｙ−ｙを位置付けるように該角形嵌合い凹部２３に嵌合して前記工具保持具Ｂと前記工具Ａとを一体に回転させる角形嵌合い軸部１２を備えた構成としてあり、この角形嵌合い凹部２３に角形嵌合い軸部１２を嵌合するように前記工具Ａを工具保持具Ｂに組み付けることによって、当該工具Ａが工具保持具Ｂに対して、この工具保持具Ｂと工具Ａとが一体に回転するように組み付けられる構成としてあり、
かつ、前記角形嵌合い軸部１２と前記角形嵌合い凹部２３には、この角形嵌合い凹部２３内に前記角形嵌合い軸部１２を嵌合することによって前記工具保持具Ｂと前記工具Ａとを係脱可能に係合する係合手段ｋを備えた構成としてあり、当該角形嵌合い凹部２３に嵌合された角形嵌合い軸部１２が該角形嵌合い凹部２３から抜け出さないように当該工具保持具Ｂと工具Ａとが係脱可能に係合される構成としてあり、
しかも、前記工具保持具Ｂと前記工具Ａとが、該工具保持具Ｂと該工具Ａのいずれか一方に凹部１４を、且つ他方に、該凹部１４に少なくとも一部を密着するように嵌合されて該凹部１４と共に前記工具保持具Ｂの回転軸線ｘ−ｘ上に前記工具Ａの回転中心線ｙ−ｙを正確に位置付ける嵌合い軸部２４を備えている構成としてあり、
更に、典型的には、前記角形嵌合い軸部１２が、該角形嵌合い軸部１２の軸中心線ｔ−ｔを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に位置付けるように前記角形嵌合い凹部２３に嵌め合わされると共に、前記嵌合い軸部２４が、該嵌合い軸部２４の軸中心線ｓ−ｓを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に位置付けるように前記凹部１４に対して嵌め合わされる構成としてある。
【００２４】
ここで工具保持具Ｂに備えつけられて当該工具保持具Ｂと共に保持構造を構成する工具Ａは、工具保持具Ｂに対して着脱可能に備え付けられる各種の工具、特に、回転駆動される当該工具保持具Ｂに備え付けられて回転状態に用いられる各種の工具であれば、いかなる工具であってもよく、前記工具保持具Ｂと共に保持構造を構成する、例えば、ドリルやフライスやリーマなどの切削工具や、回転円盤状の研削砥石やダイヤモンドホイールや研磨不織布ホイールなどの研削工具などの回転して用いられる各種工具Ａなどとして構成用意される。
【００２５】
また、かかる工具Ａが備え付けられて当該工具Ａと共に保持構造を構成する工具保持具Ｂは、当該工具Ａを保持して当該工具Ａを回転駆動し得る形態のものであれば、いかなる形態の工具保持具Ｂであってもよく、前記工具Ａと共に保持構造を構成する、例えば、回転駆動軸に備えられて工具Ａを保持する形態の工具保持具や、各種装置などの回転駆動軸にチャックなどの各種の保持具によって備えられて工具Ａを保持する形態の工具保持具Ｂなどとして構成用意される。
【００２６】
この実施の形態に係る工具の保持構造にあっては、かかる保持構造における典型例として、回転軸２２を有すると共に前記工具Ａを取付けるための嵌合い部としての角形嵌合い凹部２３を備えた保持具本体部２１を有する工具保持具Ｂと、この工具保持具Ｂにおける回転軸線ｘ−ｘ上又は該回転軸線ｘ−ｘに平行な線上に軸中心線ｔ−ｔを位置付けると共に前記工具保持具Ｂの回転軸線ｘ−ｘ上に前記工具Ａの回転中心線ｙ−ｙを位置付けるように該角形嵌合い凹部２３に嵌合して前記工具保持具Ｂと前記工具Ａとを一体に回転させる角形嵌合い軸部１２を備えると共に、工具手段、例えば、研磨手段としての研磨不織布１５などを備えた工具Ａとを備えた構成としてあり、
この工具保持具Ｂの回転軸２２の回転軸線ｘ−ｘ上に、前記工具Ａにおける回転中心線ｙ−ｙを位置付けるように前記工具保持具Ｂの嵌合い部としての角形嵌合い凹部２３と、この角形嵌合い凹部２３に嵌め合わされる前記工具Ａにおける嵌合い部としての角形嵌合い軸部１２相互が、当該工具Ａと工具保持具Ｂの回転中心線を巡る向きで係合するように密に嵌め合わされるように構成してあり、
この図示例にあっては、当該工具保持具Ｂに備えられている角形嵌合い凹部２３に前記工具Ａにおける角形嵌合い軸部１２を嵌合して当該工具Ａを工具保持具Ｂに組み付けることによって、当該工具Ａの回転中心線ｙ−ｙを前記工具保持具Ｂの回転軸線ｘ−ｘ上に位置付けて、この工具Ａと工具保持具Ｂとが一体に回転するように構成してある。
【００２７】
かかる工具Ａに備えられる角形嵌合い軸部１２及び工具保持具Ｂに備えられる角形嵌合い凹部２３は、更に、典型的には、前記工具保持具Ｂにおける前記角形嵌合い凹部２３に嵌合される前記工具Ａにおける角形嵌合い軸部１２が当該工具Ａの回転中心線ｙ−ｙを備える構成としてあり、
更に、典型的には、前記工具保持具Ｂにおける角形嵌合い凹部２３に嵌合される当該工具Ａにおける前記角形嵌合い軸部１２の軸中心線ｔ−ｔが、前記工具保持具Ｂにおける回転軸２２における回転軸線ｘ−ｘ上に位置付けられる回転中心線ｙ−ｙをなすように、該工具Ａにおける角形嵌合い軸部１２が前記工具保持具Ｂにおける角形嵌合い凹部２３に嵌合される構成としてある。
【００２８】
また、この実施の形態に係る工具の保持構造にあっては、前記工具Ａと工具保持具Ｂとに、互いに嵌まり合って、該工具Ａの回転中心線ｙ−ｙを前記工具保持具Ｂの回転軸２２の回転軸線ｘ−ｘ上に正確に位置付ける凹部１４と嵌合い軸部２４とを、その一方を前記工具Ａに、且つ、他方を前記工具保持具Ｂに備えた構成としてあり、より典型的には、その一方を前記工具Ａにおける角形嵌合い軸部１２に、且つ、他方を前記工具保持具Ｂにおける角形嵌合い凹部２３に備えた構成としてあり、更に、典型的には、前記工具Ａにおける角形嵌合い軸部１２の頂端面から該角形嵌合い軸部１２の基部方に向けて前記凹部１４を備え、且つ、この凹部１４に嵌合される嵌合い軸部２４を前記工具保持具Ｂにおける角形嵌合い凹部２３の底面から該角形嵌合い凹部２３内に突き出すように備えた構成としてあり、かかる構成から、この図示例においては、前記工具Ａに備えられる角形嵌合い軸部１２が、該角形嵌合い軸部１２の軸中心線ｔ−ｔを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に位置付けるように前記角形嵌合い凹部２３に嵌合されると共に、前記工具保持具Ｂにおける角形嵌合い凹部２３の底面から該角形嵌合い凹部２３内に突き出すように備えられている前記嵌合い軸部２４が、該嵌合い軸部２４の軸中心線ｓ−ｓを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に正確に位置付けるように前記凹部１４に対して嵌合される。
【００２９】
また、前記実施の形態に係る工具の保持構造にあっては、前記係合手段ｋを、前記角形嵌合い凹部２３の内壁面、典型的には、前記工具保持具Ｂに備えられている角形嵌合い凹部２３の内壁面から、その球体の一部を該角形嵌合い凹部２３内に突き出すように圧縮コイルバネ２８で付勢されて備えられる係合球体２７と、前記角形嵌合い軸部１２の外周面、典型的には、前記工具Ａにおける角形嵌合い軸部１２の外周面に備えられていると共に前記係合球体２７が係脱可能に係合される係合凹部１３として構成してあり、
更に、典型的には、前記工具保持具Ｂに備えられる係合球体２７が、軸方向に操作孔２６ａを備えた調整ねじ２６における該操作孔２６ａ内に、球体の一部を該操作孔２６ａから前記軸方向に突き出すように圧縮コイルバネ２８で付勢されて備えられていると共に該調整ねじ２６が前記角形嵌合い凹部２３の内壁面に開口する雌ねじ孔２５に螺進退可能に螺入されている構成としてあり、
かかる構成より、前記工具保持具Ｂにおける角形嵌合い凹部２３内に、前記工具Ａにおける角形嵌合い軸部１２を嵌合状態に差し入れることによって、前記一方の係合手段ｋである前記係合球体２７が、他方の係合手段ｋである前記係合凹部１３に係脱可能に係合されて、該角形嵌合い凹部２３に嵌合された角形嵌合い軸部１２が該角形嵌合い凹部２３から抜け出さないように該工具Ａを前記工具保持具Ｂに係脱可能な係合状態で取り付けることができる。
【００３０】
この図示例にかかる工具Ａは、更に具体的には、円盤状の研磨不織布１５を備えた研磨工具を、当該工具Ａの典型例として示したものであって、この図示例にあっては、かかる研磨工具として、盤状部１１に所謂シャンクとしての前記角形嵌合い軸部１２を前記工具保持具Ｂにおける角形嵌合い凹部２３に対する嵌合い部の一方として備えた通例ライナーと称される基体部１０に対して前記研磨不織布１５を備えた構成としてある。
【００３１】
この図示例にかかる工具Ａは、工具保持具Ｂに対する取付け部分としての角形嵌合い軸部１２を、所謂シャンクとして盤状部１１に一体に備えて構成される通例ライナーと称される基体部１０に、各種の研磨不織布１５、典型的には、基材が不規則に交錯されるナイロン繊維などで形作られると共に研磨材を接着などして備えられた円盤状の研磨不織布１５を一体に備え付けた構成としてあり、前記角形嵌合い軸部１２を前記工具保持具Ｂにおける角形嵌合い凹部２３に嵌合状態に一体に組み付けるようにして、当該工具Ａを該工具保持具Ｂに着脱可能に備え付けて用い得る構成としてある。
【００３２】
この工具Ａを構成する基体部１０は、円盤状をなす盤状部１１の上面側の中央部に、この盤状部１１の中心を通る線分の延長線上に軸中心線ｔ−ｔを有するように角形嵌合い軸部１２を該盤状部１１から上方に向けて一体に突き出し状態に備えた構成としてあり、例えば、当該盤状部１１と角形嵌合い軸部１２とを各種合成樹脂によって一体に成形して構成してある。
【００３３】
この基体部１０に備えられる角形嵌合い軸部１２は、その軸中心線ｔ−ｔに直交する向きの断面形状を多角形状、典型的には正多角形の断面形状としてあり、この図示例にあっては、正六角形の断面形状としてあると共に、その上端面１２ａが該角形嵌合い軸部１２における軸中心線ｔ−ｔに直交する面をなす構成としてあり、しかも、この突き出し端面としての上端面１２ａから該角形嵌合い軸部１２の基部方、即ち、前記盤状部１１の側に向けて前記凹部１４を備えた構成としてある。
【００３４】
かかる角形嵌合い軸部１２に備えられる凹部１４は、円形孔として構成してあり、この図示例にあっては、該角形嵌合い軸部１２における軸中心線ｔ−ｔを中心として構成される円形の孔としてある。
即ち、この図示例にあっては、前記角形嵌合い軸部１２の軸中心線ｔ−ｔを円形孔の中心線として構成される凹部１４として構成してある。
【００３５】
また、この角形嵌合い軸部１２の外周面には、この外周面を巡る向きに、前記係合手段ｋの一方側を構成する係合凹部１３を備えた構成としてある。
この角形嵌合い軸部１２に備えられる係合凹部１３は、この図示例にあっては、該角形嵌合い軸部１２の軸中心線ｔ−ｔを巡るように該角形嵌合い軸部１２の外周面に一連に連続する溝状のものとして構成してあり、典型的には、この角形嵌合い軸部１２の軸中心線ｔ−ｔと直交する面に沿った該角形嵌合い軸部１２の外周面に一連に連続して備えられる断面が弧状をなす溝状係合凹部１３’、より典型的には、半円よりも小さい円弧の弧状断面として構成される溝状係合凹部１３’として構成してある。
【００３６】
かかる構成からなるライナーとしての基体部１０に備えられる研磨不織布１５は、構成される研磨工具に夫々対応した各種形状、素材からなるものとして構成用いられるものであって、例えば、各種の合成樹脂繊維の不規則に交錯する三次元網状組織体などとして構成される不織布を基材とし、この基材に、各種の研磨材を接着剤で支持固定したものなどを、構成される研磨工具に夫々対応して、例えば、該研磨不織布１５を、接着剤を用いて前記基体部１０の面部１１ａに取付けて当該工具Ａを構成し、あるいは、前記基体部１０及び研磨不織布１５を熱可塑性合成樹脂によって構成すると共に該研磨不織布１５を該基体部１０における前記面部１１ａに溶着して当該工具Ａを構成するなど任意の方法で前記研磨不織布１５を前記基体部１０に備え付けて工具Ａを構成する。
この図示例は、かかる基体部１０に対する研磨不織布１５の典型的な備え付け例を示したものであって、前記基体部１０における盤状部１１の面部１１ａよりも大きい直径で、しかも、比較的厚い円形のマット状をなす研磨不織布１５を用意し、前記円形の面部１１ａに対して同心状、即ち、当該研磨不織布１５における中心線を前記基体部１０の角形嵌合い軸部１２における軸中心線ｔ−ｔと同一の線上に位置付けるようにして該面部１１ａに取付けて当該工具Ａを構成したものであって、
前記研磨不織布１５を熱可塑性合成樹脂繊維製とし且つ該研磨不織布１５の備えられる基体部１０を熱可塑性合成樹脂製とすると共に、この研磨不織布１５を構成する熱可塑性合成樹脂繊維の合成樹脂を基体部１０を構成する合成樹脂よりも融点の高い合成樹脂として用意し、少なくとも、この基体部１０を構成する前記盤状部１１の面部１１ａを溶融状態になし、この溶融状態にある面部１１ａに押し付けられて該溶融状態にある面部１１ａにおける合成樹脂に食い付き状態とされた該研磨不織布１５の繊維端部１５ａを、この溶融状態にある該面部１１ａの合成樹脂の冷却に伴う固化によって、該基体部１０に一体に止め付けるようにして当該工具Ａを構成してある。
なお、図中１６は、前記研磨不織布１５の補強用の織物材を示している。
【００３７】
かかる基体部１０に研磨不織布１５を備えて構成される典型的な研磨工具としての工具Ａの着脱可能な取付けに用いられる工具保持具Ｂは、前記工具Ａを着脱可能に組み付け得る角形嵌合い凹部２３と、
この角形嵌合い凹部２３に嵌合される前記工具Ａにおける角形嵌合い軸部１２を、当該角形嵌合い凹部２３内において、この角形嵌合い凹部２３から抜け出さないように前記工具Ａを当該工具保持具Ｂに対して係脱可能に係合する係合手段ｋとを備えた構成としてあり、
典型的には、前記工具Ａにおける嵌合い部としての角形嵌合い軸部１２の嵌合組み付けられる他方嵌合い部としての角形嵌合い凹部２３を備えると共に、この角形嵌合い凹部２３の内壁面から、球体の一部を突き出すように圧縮コイルバネ２８で付勢された係合球体２７を、前記一方の係合手段ｋとしての係合凹部１３に係合される他方の係合手段ｋとして備えた保持具本体部２１と、
前記角形嵌合い凹部２３に嵌合される前記工具Ａにおける角形嵌合い軸部１２の軸中心線ｔ−ｔと同一の線上に回転軸線ｘ−ｘを有するように、即ち、前記角形嵌合い凹部２３の中心線と同一の線上に該回転軸線ｘ−ｘを有するように、該保持具本体部２１に一体に備えられている回転軸２２とを有する構成としてある。
【００３８】
この保持具本体部２１に備えられる前記角形嵌合い軸部１２の嵌合い部としての角形嵌合い凹部２３は、前記回転軸２２の備えられている側と反対の側にある該保持具本体部２１の面から、前記回転軸２２の側に向けて設けられた底止まりの角形孔、具体的には、前記工具Ａにおける角形嵌合い軸部１２が略密に嵌り合う角形断面の底止まりの孔として構成してあり、該角形嵌合い凹部２３に前記工具Ａにおける角形嵌合い軸部１２を嵌合状態に組み付けた際に、この工具Ａにおける角形嵌合い軸部１２が該工具保持具Ｂにおける回転軸２２と同心で該工具保持具Ｂと一体になって回転し得る態様に設けてある。
かかる保持具本体部２１に備えられる角形嵌合い凹部２３は、典型的には、前記角形嵌合い軸部１２に対応した断面形状が正多角形状の角形嵌合い凹部２３として構成してあり、この図示例にあっては前記角形嵌合い軸部１２の略密に嵌り合う断面形状が正六角形状の底止まりの孔として構成してあって、この孔の中心線、即ち、多角形の中心を通る線分が前記回転軸２２における回転軸線ｘ−ｘ上に位置付けられる構成としてあって、この角形嵌合い凹部２３に嵌合される前記工具Ａにおける角形嵌合い軸部１２の軸中心線ｔ−ｔが該回転軸２２の回転軸線ｘ−ｘ上に位置付けられるように当該角形嵌合い軸部１２が該角形嵌合い凹部２３に嵌合状態に組み付けられる構成としてあると共に、この角形嵌合い凹部２３の底面２３ａが該角形嵌合い凹部２３の中心を通る線分、即ち、前記回転軸２２の回転軸線ｘ−ｘに直交する向きの面として構成してある。
【００３９】
かかる保持具本体部２１に備えられる係合手段ｋは、この保持具本体部２１における前記角形嵌合い凹部２３内に嵌合された前記工具Ａの角形嵌合い軸部１２における係合手段ｋとしての係合凹部１３に対して係脱可能に係合される係合球体２７を備えた構成としてあり、当該係合球体２７を、該角形嵌合い凹部２３内に嵌合される該角形嵌合い軸部１２の係合凹部１３に対応する位置の該角形嵌合い凹部２３の内壁面から、その球体の一部を圧縮コイルバネ２８によって突き出すように設けてある。
【００４０】
かかる係合手段ｋは、更に典型的には、軸方向、即ち、一方の軸端から他方軸端側に向けて底止まりの操作孔２６ａを備えると共に外周部が雄ねじ部２６ｂとされた調整ねじ２６に対して、該操作孔２６ａの底部側に一端側を接するように圧縮コイルバネ２８を内装し且つ該圧縮コイルバネ２８によって該操作孔２６ａの開口側に向けて付勢されるように係合球体２７を内装すると共に、該圧縮コイルバネ２８によって付勢される係合球体２７が、前記操作孔２６ａの縮径開口縁部に当接されて、その半球面よりも少ない球体の一部を該操作孔２６ａから前記軸方向に突き出すように備えられた構成とし、この係合球体２７を備えた調整ねじ２６を前記角形嵌合い凹部２３の内壁面に開口する雌ねじ孔２５、この図示例にあっては前記保持具本体部２１に設けられている雌ねじ孔２５に螺進退可能に螺入し、この調整ねじ２６に備えられている前記係合球体２７が、該保持具本体部２１における前記角形嵌合い凹部２３の内壁面から、その球体の一部を突き出すように当該調整ねじ２６を前記雌ねじ孔２５に対して螺入位置決めをして構成される。
【００４１】
なお、図中２６ｃは、前記調整ねじ２６の操作穴であって、レンチなどの各種工具を用いた当該調整ねじ２６の螺回動に用いられるものであって、この図示例にあっては、六角穴として構成されている。
【００４２】
かかる保持具本体部２１に備えられる係合手段ｋは、当該保持具本体部２１の角形嵌合い凹部２３に嵌合される前記工具Ａにおける角形嵌合い軸部１２に備えられている係合手段ｋとしての係合凹部１３に都合よく当該係合手段ｋを構成する係合球体２７が係合される位置に備えられて、該角形嵌合い凹部２３に嵌合された工具Ａにおける角形嵌合い軸部１２の抜け出しを効果的に防止する形態に備えられておれば、いかなる形態に備えられていてもよく、当該保持具本体部２１に備えられる係合手段ｋを一個の前記調整ねじ２６によって構成してあっても、また、複数個の調整ねじ２６によって構成してあってもよい。
【００４３】
かかる工具保持具Ｂに備えられる係合手段ｋは、典型的には、前記工具保持具Ｂを構成する保持具本体部２１の外周面から該工具保持具Ｂの角形嵌合い凹部２３内に貫通するように備えられている該工具保持具Ｂの前記回転軸２２の回転軸線ｘ−ｘに直交する向きの雌ねじ孔２５に夫々前記調整ねじ２６をねじ入れて構成してあり、典型的には、前記角形嵌合い凹部２３内に嵌合される前記角形嵌合い軸部１２の各外周面に沿って該面を巡る向きに一連に備えられている係合凹部１３における該角形嵌合い軸部１２の軸中心線ｔ−ｔを含む面に直交する向きの面部に向けて一端を開口するように前記保持具本体部２１の外周面と前記角形嵌合い凹部２３間に連通して前記回転軸線ｘ−ｘに直交する向きに備えられている各雌ねじ孔２５に夫々前記調整ねじ２６をねじ入れて構成してあり、この図示例にあっては、前記保持具本体部２１における外周面の３方向から、前記回転軸線ｘ−ｘに向けて、互いに等間隔に備えられる３個の雌ねじ孔２５を、各雌ねじ孔２５が、前記正六角形状をなす角形嵌合い凹部２３における長方形状をなす面の幅側の中央で開口するように設け、この各雌ねじ孔２５にねじ入れられた前記調整ねじ２６に備えられている前記夫々の係合球体２７によって、角形嵌合い凹部２３内に嵌め入れられる前記工具Ａにおける前記角形嵌合い軸部１２が、その軸中心線ｙ−ｙを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に偏りなく位置付けられ得るように、該係合球体２７を該角形嵌合い軸部１２における係合手段ｋとしての係合凹部１３に係脱可能に係合するようにしてある。
【００４４】
かかる構成からなる前記保持具本体部２１における角形嵌合い凹部２３内、より具体的には、該角形嵌合い凹部２３の底面２３ａから、この角形嵌合い凹部２３内に嵌合される前記工具Ａにおける角形嵌合い軸部１２の凹部１４に対して嵌合される嵌合い軸部２４、より典型的には、前記角形嵌合い凹部２３の底面２３ａから、前記工具保持具Ｂの回転軸２２の回転軸線ｘ−ｘ上に軸中心線ｓ−ｓを有すると共に前記角形嵌合い凹部２３内に嵌合される前記工具Ａにおける角形嵌合い軸部１２の円形孔状をなす凹部１４に対して嵌合される円錐台状をなす嵌合い軸部２４を、該角形嵌合い凹部２３内に突き出すように設けてあり、この嵌合い軸部２４の外周面を該凹部１４の開口縁に密に接するように嵌合し、且つ、前記角形嵌合い軸部１２を前記角形嵌合い凹部２３に嵌合することによって、前記工具Ａが工具保持具Ｂに対して、該工具保持具Ｂと該工具Ａとが一体に回転するように該工具Ａにおける角形嵌合い軸部１２の軸中心線ｔ−ｔを該工具保持具Ｂの回転軸２２の回転軸線ｘ−ｘ上に位置付けた状態で、この工具Ａにおける回転中心線ｙ−ｙを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に位置付けて、前記各係合手段ｋ相互の係合によって着脱可能に組み付けられる。
【００４５】
かかる工具Ａの取付けに用いられる前記工具保持具Ｂは、当該工具保持具Ｂを前記回転軸２２と前記保持具本体部２１とを一体のものとして構成してあっても、また、この回転軸２２と保持具本体部２１とを各種部材の組み付けによって構成してあってもよい。
【００４６】
かかる工具保持具Ｂは、例えば、図示例におけるように、ブロック材２０と、このブロック材２０に備えられている雌ねじ孔２０ｄに螺着される軸部材２０’との一体的な組み付けによって構成し、このブロック材２０と軸部材２０’との一体的な組付け体として構成される工具保持具Ｂが、前記嵌合い軸部２４を備えた角形嵌合い凹部２３及び調整ねじ２５のねじ入れ用雌ねじ孔２５などを備えた保持具本体部２１、及び、前記回転軸２２などの各構成を備えるように構成することができる。
【００４７】
かかる図示例に係るブロック材２０は、下部側が円盤状部２０ａとされていると共に上部側が円錐台状部２０ｂとされた一体形状のものとしてあり、該円盤状部２０ａと円錐台状部２０ｂの中心線を中心線とするように該円盤状部２０ａの下端面２０ｆの中央部と前記円錐台状部２０ｂの上端面２０ｅの中央部との間を一連に孔状をなすように連通する凹部２０ｃ及び該凹部２０ｃよりも小さい孔径の雌ねじ孔２０ｄとを備え、しかも、この円盤状部２０ａの外周面と前記凹部２０ｃとの間を連通する複数の雌ねじ孔２５を該円盤状部２０ａの中心から放射方向の向きに備えた構成としてある。
【００４８】
このブロック材２０に備えられる凹部２０ｃは、該ブロック材２０の下端面２０ｆ，即ち、前記円盤状部２０ａの面から前記円錐台状部２０ｂの側に向けて角形孔状に凹む構成、より具体的には、前記角形嵌合い軸部１２が嵌合される形状、寸法の凹部２０ｃ、即ち、この図示例にあっては、前記の断面形状が六角形状をなす角形嵌合い軸部１２が密に嵌合されて、相互に回り止めの状態に嵌め付けられる六角形状の角孔状凹部２０ｃとしてあると共に、この凹部２０ｃの底面２０ｇと前記円錐台状部２０ｂの上端面２０ｅとの間を連通するように前記雌ねじ孔２０ｄが該雌ねじ孔２０ｄの孔周縁に前記底面２０ｇを段差状に残すように備えられている構成としてある。
【００４９】
かかるブロック材２０に備えられている前記正六角形状の角孔状凹部２０ｃの中心を通る線と、前記雌ねじ孔２０ｄの中心線とが同一線上に位置付けられているとともに、これらの各線が、前記ブロック材２０における円盤状部２０ａ及び円錐台状部２０ｂの中心を通る線上に位置付けられている構成としてあり、この円盤状部２０ａの外周面と前記凹部２０ｃとの間を連通するように備えられている前記雌ねじ孔２５の中心を通る線が角孔状凹部２０ｃを構成する長方形状の内壁面の幅側の中心を通り且つ前記円盤状部２０ａの中心を通る線に直交する構成としてあり、この図示例にあっては、前記雌ねじ孔２５を、前記正六角形状の角孔状凹部２０ｃを構成する長方形状をなす６個の内壁面のうちの１個おきにある内壁面に夫々開口するように備えられた３個の雌ねじ孔２５としてあると共に、この雌ねじ孔２５における中心線が前記内壁面における幅（短辺）の中心を通り且つ前記円盤状部２０ａの中心を通る線に直交する構成としてある。
【００５０】
かかるブロック材２０に一体的に組み付けられて工具保持具Ｂを構成する軸部材２０’は、軸部２０’ａと、この軸部２０’ａに鍔部２０’ｂを介して一体に連続して備えられている雄ねじ部２０’ｃと、この雄ねじ部２０’ｃに一体に連続して備えられている円錐台状をなす凸部２０’ｄとを備えた構成としてあり、この軸部２０’ａと雄ねじ部２０’ｃと凸部２０’ｄとが夫々の軸中心線を同一の線上に備えた構成としてあり、前記鍔部２０’ｂを前記ブロック材２０の上端面２０ｅに突き当てるように該雄ねじ部２０’ｃを前記雌ねじ孔２０ｄにねじ入れた際に、前記凸部２０’ｄが、前記底面２０ｇから凹部２０ｃ内に突き出すように構成してある。
【００５１】
かかる構成からなる軸部材２０’を、この軸部材２０’における前記鍔部２０’ｂを前記ブロック材２０の上端面２０ｅに突き当てるように該軸部材２０’における前記雄ねじ部２０’ｃを前記ブロック材２０における雌ねじ孔２０ｄにねじ入れ、当該軸部材２０’とブロック材２０とを一体的に固着した状態に組み付けて当該工具保持具Ｂを構成する。
【００５２】
このように軸部材２０’をブロック材２０に組み付けて構成される工具保持具Ｂは、前記軸部２０’ａが該工具保持具Ｂにおける前記回転軸２２とされると共に、互いに一体的に組み付けられる前記ブロック材２０及び前記雄ねじ部２０’ｃ並びに前記鍔部２０’ｂが該工具保持具Ｂにおける前記保持具本体部２１とされ、また、前記凹部２０ｃが該工具保持具Ｂにおける前記角形嵌合い凹部２３とされ、前記凸部２０’ｄが該工具保持具Ｂにおける嵌合い軸部２４とされ、前記工具保持具Ｂを当該ブロック材２０と軸部材２０’との組み付けによって容易に構成することができる。
【００５３】
かかる工具保持具Ｂは、更に、他の部材の組み付けによって構成してあってもよく、例えば、前記ブロック材２０における円盤状部２０ａと円錐台状部２０ｂとを別段に成形用意して、これらを連結してブロック材２０を構成すると共に、これに前記軸部材２０’を組み付けて当該工具保持具Ｂを構成するなど、各種部材の組み付けによって構成することができる。
【００５４】
（２）第２の実施の形態に係る工具の保持構造
次いで、図７〜図１２で示される第２の実施の形態に係る工具の保持構造について具体的に説明する。
この第２の実施の形態に係る工具の保持構造は、例えば、回転駆動軸に備えられる工具保持具や、回転駆動軸にチャックなどの各種の保持具によって備えられる工具保持具などのように回転駆動軸部側に備えられる工具保持具Ｂと、該工具保持具Ｂに対して取付けて用いられる工具Ａとが、該工具保持具Ｂと該工具Ａのいずれか一方に角形嵌合い凹部２３を、且つ他方に、前記工具保持具Ｂの回転軸線ｘ−ｘ上又は該回転軸線ｘ−ｘに平行な線上に軸中心線ｔ−ｔを位置付けると共に前記工具保持具Ｂの回転軸線ｘ−ｘ上に前記工具Ａの回転中心線ｙ−ｙを位置付けるように該角形嵌合い凹部２３に嵌合して前記工具保持具Ｂと前記工具Ａとを一体に回転させる角形嵌合い軸部１２を備えた構成としてあり、この角形嵌合い凹部２３の角形嵌合い軸部１２を嵌合するように前記工具Ａを工具保持具Ｂに組み付けることによって、当該工具Ａが工具保持具Ｂに対して、この工具保持具Ｂと工具Ａとが一体に回転するように組み付けられる構成としてあり、
かつ、前記角形嵌合い軸部１２と前記角形嵌合い凹部２３には、この角形嵌合い凹部２３内に前記角形嵌合い軸部１２を嵌合することによって前記工具保持具Ｂと前記工具Ａとを係脱可能に係合する係合手段ｋを備えた構成としてあり、当該角形嵌合い凹部２３に嵌合された角形嵌合い軸部１２が該角形嵌合い凹部２３から抜け出さないように当該工具保持具Ｂと工具Ａとが係脱可能に係合される構成としてあり、
しかも、前記工具保持具Ｂと前記工具Ａとが、該工具保持具Ｂと該工具Ａのいずれか一方に凹部１４を、且つ他方に、該凹部１４に少なくとも一部を密着するように嵌合されて該凹部１４と共に前記工具保持具Ｂの回転軸線ｘ−ｘ上に前記工具Ａの回転中心線ｙ−ｙを正確に位置付ける嵌合い軸部２４を備えている構成としてあり、
更に、典型的には、前記角形嵌合い軸部１２が、該角形嵌合い軸部１２の軸中心線ｔ−ｔを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に位置付けるように前記角形嵌合い凹部２３に嵌合されると共に、前記嵌合い軸部２４が、該嵌合い軸部２４の軸中心線ｓ−ｓを前記工具保持具Ｂにおける回転軸線ｘ−ｘ上に位置付けるように前記凹部１４に対して嵌め合わされる構成としてあり、
研磨不織布１５’を面ファスナー１７で基体部１０に係脱可能に装着して当該保持構造を構成する研磨工具Ａを構成した以外の構成を前記第１の実施の形態に係る工具の保持構造の構成と同一又は実質的に同一の構成としてあり、該第１の実施の形態に係る工具の保持構造におけると同一の態様で組み付け構成されるようにしてある。
従って、前記第１の実施の形態に係る工具の保持構造の構成と同一又は実質的に同一の構成部分に同一の番号を付して、その説明を省略する。
【００５５】
この実施の形態に係る工具の保持構造を構成する工具Ａは、前記第１の実施の形態に係る工具の保持構造を構成する工具Ａにおける基体部１０と同一の構成からなる基体部１０に対して、前記第１の実施の形態に係る工具の保持構造を構成する工具Ａにおける研磨不織布１５と実質的に同一の構成からなる研磨不織布１５’を雌雄対をなす面ファスナー１７で係脱可能に装着することによって構成するようにしてあり、一般にライナーと称される基体部１０に対して研磨手段としての研磨不織布１５’を適宜取り換えて研磨をなし得るように構成してある。
【００５６】
かかる基体部１０に面ファスナー１７によって係合されて工具Ａを構成する研磨不織布１５’は、研磨材を備えると共に研磨対象物に対応して各種の繊維素材を不規則に交錯する三次元網状組織体などとして各種形状に構成されたものであってよく、この図示例にあっては、研磨材を接着剤で接着するなどして構成される合成樹脂繊維によって形作られる厚幅の円盤状体をなすフェルト状の研磨不織布１５’としてあり、研磨面と反対の側にある面に面ファスナー１７における雌雄の一方側１７’を備え付けた構成としてある。
【００５７】
かかる研磨不織布１５’を係合状態に備え得る基体部１０は、該研磨不織布１５’を係脱可能に係合する構成を備えた以外の構成を、前記第１の実施の形態に係る工具の保持構造における基体部１０と同一の構成としてあり、円盤状をなす盤状部１１の上面側の中央部に、この盤状部１１の中心を通る線分の延長線上に軸中心線ｔ−ｔを有するように角形嵌合い軸部１２を該盤状部１１から上方に向けて一体に突き出し状態に備えた構成としてあると共に、その下面側に前記雌雄をなす面ファスナー１７の他方側１７”が備え付けられており、例えば、当該盤状部１１と角形嵌合い軸部１２とを各種合成樹脂によって一体に成形して構成してある。
【００５８】
かかる基体部１０に備えられる角形嵌合い軸部１２は、その軸中心線ｔ−ｔに直交する向きの断面形状を多角形状、典型的には正多角形の断面形状としてあり、この図示例にあっては、正六角形の断面形状としてあると共に、その上端面１２ａが該角形嵌合い軸部１２における軸中心線ｔ−ｔに直交する面をなす構成としてあると共に、この突き出し端面としての上端面１２ａから該角形嵌合い軸部１２の基部方、即ち、前記盤状部１１の側に向けて前記凹部１４を備えた構成としてある。
【００５９】
また、かかる角形嵌合い軸部１２に備えられる凹部１４は、円形孔として構成してあり、この図示例にあっては、該角形嵌合い軸部１２における軸中心線ｔ−ｔを中心として構成される円形の孔としてある。
即ち、この図示例にあっては、前記角形嵌合い軸部１２の軸中心線ｔ−ｔを円形孔の中心線として構成される凹部１４として構成してある。
【００６０】
また、この角形嵌合い軸部１２の外周面には、この外周面を巡る向きに、前記係合手段ｋの一方側を構成する係合凹部１３を備えた構成としてある。
この角形嵌合い軸部１２に備えられる係合凹部１３は、この図示例にあっては、該角形嵌合い軸部１２の軸中心線ｔ−ｔを巡るように該角形嵌合い軸部１２の外周面に一連に連続する溝状のものとして構成してあり、典型的には、この角形嵌合い軸部１２の軸中心線ｔ−ｔと直交する面に沿った該角形嵌合い軸部１２の外周面に一連に連続して備えられる断面が弧状をなす溝状係合凹部１３’、より典型的には、半円よりも小さい円弧の弧状断面として構成される溝状係合凹部１３’として構成してある。
【００６１】
かかる構成からなる基体部１０に備えられている前記雌雄をなす面ファスナー１７の一方側１７”に、前記研磨不織布１５’に備えられている当該雌雄をなす面ファスナー１７の他方側を係合して、該研磨不織布１５’を基体部１０に備え付けて研磨工具Ａを構成する。
【００６２】
このように構成される工具Ａの組み付けられる工具保持具Ｂは、前記第１の実施の形態に係る工具の保持構造における工具保持具Ｂと同一の構成の工具保持具Ｂとしてあり、前記第１の実施の形態に係る工具の保持構造におけると同一の態様で当該第２の実施の形態に係る工具の保持構造における工具Ａを該工具保持具Ｂに対して着脱可能に組み付け得るようにしてあり、より具体的には、当該工具保持具Ｂに対して当該工具Ａを構成している基体部１０を、前記研磨不織布１５’を備え付けた状態で組み付けて用い、又は、前記研磨不織布１５’を取り外した状態で組み付けると共に該基体部１０に研磨不織布１５’を係合して用いるようにしてある。
【００６３】
【発明の効果】
この発明に係る工具の保持構造は、工具保持具と工具とが、該工具保持具と該工具のいずれか一方に角形嵌合い凹部を、且つ他方に、前記工具保持具の回転軸線上に前記工具の回転中心線を位置付けるように該角形嵌合い凹部に嵌合される角形嵌合い軸部を備えていると共に、前記角形嵌合い軸部と前記角形嵌合い凹部には、前記工具保持具と前記工具とを該角形嵌合い凹部内に前記角形嵌合い軸部を嵌合することによって係脱可能に係合する係合手段を備えており、
しかも、前記工具保持具と前記工具とが、該工具保持具と該工具のいずれか一方に凹部を、且つ他方に、該凹部に嵌合されて該凹部と共に前記工具保持具の回転軸線上に前記工具の回転中心線を位置付ける嵌合い軸部を備えていることから、前記凹部に嵌合い軸部を嵌め入れるように前記角形嵌合い軸部を前記角形嵌合い凹部に嵌合することによって、前記工具と前記工具保持具とが一体に回転するように、前記工具が前記工具保持具に対して着脱可能に取付けられると共に該工具保持具における回転軸線上に当該工具における回転中心線を一致させて当該工具を該工具保持具に取付けることができる利点を有している。
また、このように構成される工具の保持構造にあっては、当該工具をいずれの向きに回転駆動させて用いた場合でも、当該取付け工具の取付けに緩み出しを生ずることがない利点を有している。
【００６４】
また、前記構成に係る工具の保持構造において、前記角形嵌合い軸部が、該角形嵌合い軸部の軸中心線を前記工具保持具における回転軸線上に位置付けるように前記角形嵌合い凹部に嵌合されると共に、前記嵌合い軸部が、該嵌合い軸部の軸中心線を前記工具保持具における回転軸線上に位置付けるように前記凹部に対して嵌合される構成とすることによって、当該工具の使用に際して当該工具における回転中心線を工具保持具における回転軸線上に極力位置付けるようになすことができる利点を有している。
【００６５】
また、前記構成に係る工具の保持構造において、前記係合手段を、前記角形嵌合い凹部の内壁面から、球体の一部を該角形嵌合い凹部内に突き出すように圧縮コイルバネで付勢されて備えられている係合球体と、前記角形嵌合い軸部の外周面に備えられていると共に前記係合球体が係脱可能に係合される係合凹部とすることによって、前記工具を工具保持具に対して、円滑に取付け且つ取り外すことができる利点を有している。
【００６６】
また、前記構成に係る工具の保持構造において、前記係合球体が、軸方向に操作孔を備えた調整ねじにおける該操作孔内に、球体の一部を該操作孔から前記軸方向に突き出すように圧縮コイルバネで付勢されて備えられていると共に、該調整ねじが前記角形嵌合い凹部の内壁面に開口する雌ねじ孔に螺進退可能に螺入されている構成とすることによって、前記工具保持具と前記工具とを、都合の良い係合状態に着脱可能に組み付けることができる利点を有している。
【図面の簡単な説明】
【図１】典型的な第１の実施の形態に係る工具の保持構造を構成する工具保持具の要部と工具とを一部部品を分離して示した斜視図
【図２】同工具を工具保持具に組み付けた状態を該工具保持具の一部を省略し且つ要部を破断して示した側面図
【図３】同工具を工具保持具に組み付けた状態の平断面図
【図４】同工具保持具の主要部を、その一部を破断して示した側面図
【図５】同工具の平面図
【図６】同工具の一部を破断して示した側面図
【図７】典型的な第２の実施の形態に係る工具の保持構造を構成する工具保持具の要部と工具とを一部部品を分離して示した斜視図
【図８】同工具を工具保持具に組み付けた状態を該工具保持具の一部を省略し且つ要部を破断して示した側面図
【図９】同工具を工具保持具に組み付けた状態の平断面図
【図１０】同工具保持具の主要部を、その一部を破断して示した側面図
【図１１】同工具の平面図
【図１２】同工具の一部を破断して示した側面図
【符号の説明】
Ａ工具
Ｂ工具保持具
ｋ係合手段
１２角形嵌合い軸部
１３係合凹部
１４凹部
２３角形嵌合い凹部
２４嵌合い軸部
２６調整ねじ
２７係合球体
２８圧縮コイルバネ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tool holding structure, and more particularly, to a tool holding structure in which a tool used by being rotationally driven can be easily and concentrically attached to a rotary drive shaft.
[0002]
[Prior art]
In general, a tool is used by using a tool holder so that the tool is connected to the rotary drive shaft side, and the tool is screwed to the tool holder or inserted into a collet chuck. For example, the tool shank is fastened to the tool holder by a predetermined fastening operation such as tightening the shank of the tool with a fastening collar.
[0003]
[Problems to be solved by the invention]
However, the operation of fastening the tool to the tool holder is to screw the tool into the tool holder, for example, by screwing a screw rod provided in the tool into an attachment screw hole provided in the tool holder. Or after inserting the shank in the tool into the collet chuck, the required fastening operation is required, such as screwing the collar of the collet chuck, especially when replacing the tool in a hand-held power tool, While holding the electric tool with one hand, it is necessary to replace the tool with the other hand, which makes it difficult to smoothly replace the tool.
[0004]
Further, in various devices that are used by rotationally driving a tool that is screwed to the tool holder, the tool is rotationally driven in a direction opposite to the screwing direction of the tool with respect to the tool holder. When used, there was a problem that the screwed-in tool loosened with its use.
[0005]
The present invention eliminates the problems associated with the conventional tool attachment, and can easily attach the tool in a concentric state with respect to the drive rotation shaft by one-touch operation, and the tool can be mounted in any orientation. The main object of the present invention is to provide a tool holding structure that does not cause loosening in the mounting of the mounting tool even when it is used while being rotated.
[0006]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention provides the invention according to claim 1,The tool holder includes a square fitting recessed portion, and the tool includes a square fitting shaft portion fitted into the square fitting concave portion, and
  The square fitting shaft and the square fitting recess are detachably engaged with the tool holder and the tool by fitting the square fitting shaft into the square fitting recess. Engaging means,
  Moreover,The square fitting shaft portion includes a concave portion having a circular hole shape from the upper end surface of the square fitting shaft portion toward the base,
  Further, the square fitting recess is fitted into the circular hole-like recess from the bottom surface of the square fitting recess into the square fitting recess, and on the rotation axis of the tool holder together with the recess. It is equipped so that the fitting shaft part which makes the truncated cone shape which positions the rotation center line of the tool is projected.The tool holding structure is characterized by this.
[0007]
In the holding structure of the tool configured as described above, by fitting the square fitting shaft portion to the square fitting recess so as to fit the fitting shaft portion into the recess, the tool and the The tool is detachably attached to the tool holder so that the tool holder rotates integrally with the tool holder, and the rotation center line of the tool is made to coincide with the rotation axis of the tool holder. It can be attached to the tool holder.
[0008]
Further, in the tool holding structure configured as described above, even when the tool is rotationally driven in any direction, the attachment of the attachment tool does not come loose.
[0010]
  further,In the tool holding structure configured as described above, in addition to the above features, the rotation center line of the tool can be positioned as much as possible on the rotation axis of the tool holder when the tool is used.
[0011]
  In order to achieve the object,The invention according to claim 2 is the invention according to claim 1,The engaging means is provided with an engaging sphere urged by a compression coil spring so that a part of the sphere protrudes from the inner wall surface of the square fitting recess into the square fitting recess, and the square fitting The tool holding structure is provided as an engaging recess that is provided on the outer peripheral surface of the mating shaft portion and that is engaged with the engaging sphere in a releasable manner.
[0012]
In the tool holding structure configured as described above, the tool can be smoothly attached to and detached from the tool holder in addition to the above features.
[0013]
  In order to achieve the object,The invention according to claim 3 is the invention according to claim 2,The engagement sphere is provided in the operation hole of the adjustment screw having an operation hole in the axial direction, and is biased by a compression coil spring so that a part of the sphere protrudes from the operation hole in the axial direction. At the same time, the tool holding structure is characterized in that the adjustment screw is screwed into a female screw hole opened in the inner wall surface of the rectangular fitting recess so as to be able to advance and retract.
[0014]
In the tool holding structure configured as described above, the tool holder and the tool can be detachably assembled in a convenient engagement state in addition to the above features.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a tool holding structure according to each exemplary embodiment of the present invention will be described in detail.
[0016]
1 to 6 show a holding structure for a tool according to a typical first embodiment. In FIG. 1, the main part is separated and a part of the tool holder B is omitted. 2 is viewed obliquely from above, in FIG. 2, the state in which the tool A related to the tool holding structure is attached to the tool holder B is viewed from the side with the main part broken, and in FIG. A cross section in a direction perpendicular to the rotation axis of the tool holder B is shown from the upper side to the lower side.
In FIG. 4, the tool holder B constituting the tool holding structure is shown in cross-section and viewed from the side before the adjustment screw 26 is provided.
In FIG. 5, the tool A constituting the holding structure of the tool is viewed from above, and in FIG. 6, a part of the tool A is broken and viewed from the side.
[0017]
7 to 12 show a holding structure for a tool according to a typical second embodiment. In FIG. 7, the main part is separated and a part of the tool holder B is omitted. When viewed obliquely from above, in FIG. 8, the state in which the tool A related to the tool holding structure is attached to the tool holder B is viewed from the side with the main part broken, and in FIG. A cross section in a direction perpendicular to the rotation axis of the tool holder B is shown from the upper side to the lower side.
In FIG. 10, the tool holder B constituting the tool holding structure is shown in cross-section and viewed from the side before the adjustment screw 26 is provided.
In FIG. 11, the tool A constituting the tool holding structure is viewed from above, and in FIG. 12, a part of the tool A is broken and viewed from the side.
[0018]
The tool holding structure according to the typical embodiment of the present invention is such that the tool holder B and the tool A have a concave fitting 23 that is squarely fitted to either the tool holder B or the tool A, and the other. The tool holder B, the tool A, and the tool holder B are fitted into the rectangular fitting recess 23 so that the rotation center line yy of the tool A is positioned on the rotation axis xx of the tool holder B. The tool A is assembled to the tool holder B so that the square fitting shaft portion 12 is fitted to the square fitting concave portion 23. The tool A is assembled to the tool holder B so that the tool holder B and the tool A rotate together,
Moreover, the tool holder B and the tool A are fitted into the square fitting shaft portion 12 and the square fitting recess portion 23 by fitting the square fitting shaft portion 12 into the square fitting recess portion 23. The tool is configured to include the engaging means k for releasably engaging the tool so that the square fitting shaft portion 12 fitted to the square fitting concave portion 23 does not come out of the square fitting concave portion 23. The holding tool B and the tool A are configured to be detachably engaged,
Moreover, the tool holder B and the tool A are fitted into the recess 14 in one of the tool holder B and the tool A, and the other is fitted into the recess 14 and the tool together with the recess 14. The fitting shaft portion 24 that accurately positions the rotation center line yy of the tool A on the rotation axis xx of the holder B is provided.
[0019]
In the tool holding structure configured as described above, the square fitting shaft portion 12 is fitted into the square fitting recess portion 23 so that the fitting shaft portion 24 is fitted into the recess portion 14. The tool A is detachably attached to the tool holder B so that the tool holder B and the tool A rotate together, and on the rotation axis xx of the tool holder B. The tool A can be attached to the tool holder B by making the rotation center line yy of the tool A coincide.
In the tool holding structure configured as described above, the assembly of the tool A to the tool holder B is fitted into the square fitting recess 23 and the square fitting recess 23. Since the rectangular fitting shaft portions 12 are configured by mutual engagement of the respective square surfaces, the tool with respect to the tool holder B can be used regardless of the direction in which the tool A is rotationally driven. No loosening occurs in the mounting of A.
[0020]
Further, in the tool holding structure according to the above configuration, the square fitting shaft portion 12 positions the axial center line tt of the square fitting shaft portion 12 on the rotation axis xx of the tool holder B. Thus, the fitting shaft portion 24 accurately fits the shaft center line ss of the fitting shaft portion 24 on the rotation axis xx of the tool holder B. In addition to the above features, when the tool A is used, the rotational center line yy of the tool A is set to the tool by using a configuration in which at least a part thereof is closely fitted to the recess 14 so as to be positioned on the tool A. The holder B can be positioned as much as possible on the rotation axis xx.
[0021]
Further, in the tool holding structure according to the above configuration, the engaging means k is configured so that the compression coil spring 28 is configured so that a part of the sphere protrudes from the inner wall surface of the rectangular fitting recess 23 into the rectangular fitting recess 23. And the engagement sphere 27 provided by being urged by the engagement sphere 27 and the engagement recess 13 that is provided on the outer peripheral surface of the rectangular fitting shaft portion 12 and that the engagement sphere 27 is detachably engaged with. ,
In addition to the above features, the square fitting shaft portion 12 is pressed and fitted into the square fitting concave portion 23 so that the square fitting shaft portion 12 compresses the engagement sphere 27 on the outer peripheral surface thereof. The engaging sphere 27 is inserted into the engaging recess 13 provided in the rectangular fitting shaft portion 12 which is pushed back against the bias of the coil spring 28 and pushed inward of the rectangular fitting concave portion 23. The tool A can be assembled and engaged with the tool holder B by being inserted and engaged by the bias of the compression coil spring 28, and
Only by pulling the square fitting shaft portion 12 in this engaged state from the square fitting concave portion 23 in the pulling direction, the square fitting shaft portion 12 urges the engaging sphere 27 to urge the compression coil spring 28. The tool A can be removed from the tool holder B by pushing back and releasing the engagement of the engagement sphere 27 with the engagement recess 13.
[0022]
Further, in the tool holding structure according to the above configuration, the engaging sphere 27 is partially inserted into the operation hole 26a of the adjustment screw 26 provided with the operation hole 26a in the axial direction from the operation hole 26a. The adjustment screw 26 is urged by a compression coil spring 28 so as to protrude in the axial direction, and the adjustment screw 26 is screwed into a female screw hole 25 opened in the inner wall surface of the rectangular fitting recess 23 so as to be able to advance and retract. With the configuration, in addition to the above features, the tool holder B and the tool A can be detachably assembled after adjusting them to a convenient mounting state.
[0023]
(1) Tool holding structure according to the first embodiment
First, the tool holding structure according to the first embodiment shown in FIGS. 1 to 6 will be described in detail.
The tool holding structure according to the first embodiment rotates, for example, as a tool holder provided on a rotary drive shaft or a tool holder provided on the rotary drive shaft by various holders such as a chuck. The tool holder B provided on the drive shaft side and the tool A used for assembly to the tool holder B are provided with a concave fitting 23 that is squarely fitted to either the tool holder B or the tool A. On the other hand, the axial center line tt is positioned on the rotation axis xx of the tool holder B or on a line parallel to the rotation axis xx and on the rotation axis xx of the tool holder B. And a square fitting shaft portion 12 that is fitted into the square fitting concave portion 23 so as to position the rotation center line yy of the tool A and rotates the tool holder B and the tool A integrally. There is a configuration, and the square fitting recess 23 is square. By assembling the tool A to the tool holder B so as to fit the fitting shaft portion 12, the tool A and the tool A rotate integrally with the tool holder B. As a configuration that can be assembled as
Further, the tool holder B and the tool A are fitted into the square fitting shaft portion 12 and the square fitting concave portion 23 by fitting the square fitting shaft portion 12 into the square fitting concave portion 23. The tool is configured to include the engaging means k for releasably engaging the tool so that the square fitting shaft portion 12 fitted to the square fitting concave portion 23 does not come out of the square fitting concave portion 23. The holding tool B and the tool A are configured to be detachably engaged,
Moreover, the tool holder B and the tool A are fitted so that either one of the tool holder B and the tool A has a concave portion 14 and the other has at least a part in close contact with the concave portion 14. In addition to the recess 14, the tool holder B includes a fitting shaft portion 24 that accurately positions the rotation center line yy of the tool A on the rotation axis xx of the tool holder B.
Further, typically, the rectangular fitting shaft portion 12 is positioned so that the axial center line tt of the rectangular fitting shaft portion 12 is positioned on the rotation axis xx of the tool holder B. The recess 14 is fitted into the mating recess 23, and the fitting shaft portion 24 positions the axis center line ss of the fitting shaft portion 24 on the rotation axis xx of the tool holder B. It is set as the structure fitted with.
[0024]
Here, the tool A that is provided in the tool holder B and constitutes a holding structure together with the tool holder B is various tools that are detachably attached to the tool holder B, in particular, the tool holder that is rotationally driven. Any tool may be used as long as it is a variety of tools that are provided in the tool B and used in a rotating state. For example, a cutting tool such as a drill, a milling cutter, or a reamer is used together with the tool holder B to form a holding structure. These are prepared as various tools A that are used by rotating, such as a rotating disc-shaped grinding wheel, a grinding tool such as a diamond wheel or a polishing nonwoven wheel.
[0025]
In addition, the tool holder B, which is provided with the tool A and forms a holding structure together with the tool A, can be any type of tool as long as the tool A can be held and the tool A can be rotationally driven. The holding tool B may be used, and constitutes a holding structure together with the tool A. For example, a tool holding tool that is provided on the rotary drive shaft and holds the tool A, or a chuck on the rotary drive shaft of various devices. The tool holder B is configured and prepared in a form that holds the tool A.
[0026]
In the tool holding structure according to this embodiment, as a typical example of such a holding structure, a holding shaft having a rotating shaft 22 and a square fitting recess 23 as a fitting portion for attaching the tool A is provided. A tool holder B having a tool body 21 and an axis center line tt positioned on the rotation axis xx of the tool holder B or on a line parallel to the rotation axis xx and the tool holder B A square fitting that rotates the tool holder B and the tool A together by fitting in the square fitting recess 23 so that the rotation center line yy of the tool A is positioned on the rotation axis xx of the tool A Along with the mating shaft portion 12, the tool means, for example, a tool A provided with a polishing nonwoven fabric 15 as a polishing means, etc.,
A rectangular fitting recess 23 as a fitting portion of the tool holder B so that the rotation center line yy of the tool A is positioned on the rotation axis xx of the rotary shaft 22 of the tool holder B; The square fitting shaft portions 12 as fitting portions in the tool A to be fitted into the square fitting concave portion 23 are closely connected so as to engage with each other in a direction around the rotation center line of the tool A and the tool holder B. It is configured to be fitted to
In this illustrated example, the square fitting shaft portion 12 of the tool A is fitted into the square fitting recess 23 provided in the tool holder B, and the tool A is assembled to the tool holder B. Thus, the rotation center line yy of the tool A is positioned on the rotation axis xx of the tool holder B, and the tool A and the tool holder B are integrally rotated.
[0027]
The square fitting shaft portion 12 provided in the tool A and the square fitting concave portion 23 provided in the tool holder B are typically fitted into the square fitting concave portion 23 in the tool holder B. In the tool A, the square fitting shaft portion 12 includes a rotation center line yy of the tool A,
Further, typically, the axial center line tt of the square fitting shaft portion 12 in the tool A fitted in the square fitting recess 23 in the tool holder B is rotated in the tool holder B. The square fitting shaft portion 12 of the tool A is fitted to the square fitting concave portion 23 of the tool holder B so as to form a rotation center line yy positioned on the rotation axis xx of the shaft 22. As a configuration.
[0028]
In the tool holding structure according to this embodiment, the tool A and the tool holder B are fitted to each other, and the rotation center line yy of the tool A is set to the tool holder B. The concave portion 14 and the fitting shaft portion 24 that are accurately positioned on the rotation axis xx of the rotation shaft 22 are configured so that one of them is provided in the tool A and the other is provided in the tool holder B. More typically, one is provided in the square fitting shaft portion 12 in the tool A, and the other is provided in the square fitting recess 23 in the tool holder B, and more typically, In the tool A, the concave portion 14 is provided from the top end surface of the square fitting shaft portion 12 toward the base of the square fitting shaft portion 12, and the fitting shaft portion 24 fitted into the concave portion 14 is provided with the fitting shaft portion 24. From the bottom of the rectangular fitting recess 23 in the tool holder B, In this illustrated example, the square fitting shaft portion 12 provided in the tool A has an axial center of the square fitting shaft portion 12 so as to protrude into the shape fitting concave portion 23. The rectangular fitting recess 23 in the tool holder B is fitted into the rectangular fitting recess 23 so that the line tt is positioned on the rotation axis xx in the tool holder B, and the square is formed from the bottom surface of the rectangular fitting recess 23 in the tool holder B. The fitting shaft portion 24 provided so as to protrude into the fitting recess 23 accurately aligns the axis center line ss of the fitting shaft portion 24 on the rotation axis xx of the tool holder B. The recess 14 is fitted so as to be positioned.
[0029]
In the tool holding structure according to the above-described embodiment, the engagement means k is formed in the square shape provided in the inner wall surface of the concave fitting recess 23, typically the tool holder B. An engagement sphere 27 urged by a compression coil spring 28 so as to project a part of the sphere from the inner wall surface of the fitting recess 23 into the square fitting recess 23, and the rectangular fitting shaft portion 12. It is configured as an engagement recess 13 that is provided on the outer peripheral surface, typically the outer peripheral surface of the square fitting shaft portion 12 in the tool A, and to which the engagement sphere 27 is detachably engaged. ,
Further, typically, the engaging sphere 27 provided in the tool holder B is partially arranged in the operation hole 26a of the adjustment screw 26 provided with the operation hole 26a in the axial direction. The adjustment screw 26 is screwed into a female screw hole 25 opened in the inner wall surface of the rectangular fitting recess 23 so as to be able to advance and retract. There is a configuration that
With this configuration, the engagement that is the one engagement means k is performed by inserting the rectangular fitting shaft portion 12 of the tool A into the fitting state into the rectangular fitting concave portion 23 of the tool holder B. The spherical body 27 is detachably engaged with the engaging recess 13 which is the other engaging means k, and the square fitting shaft portion 12 fitted into the square fitting concave portion 23 is the square fitting concave portion. The tool A can be attached to the tool holder B in an engageable and disengageable state so as not to come out of the tool holder B.
[0030]
More specifically, the tool A according to the illustrated example is a polishing tool provided with a disc-shaped polishing nonwoven fabric 15 as a typical example of the tool A. In the illustrated example, As such a polishing tool, a base portion generally referred to as a liner provided with the square fitting shaft portion 12 as a so-called shank on the disk-like portion 11 as one of fitting portions with respect to the square fitting concave portion 23 in the tool holder B. 10, the polishing nonwoven fabric 15 is provided.
[0031]
The tool A according to this illustrated example is a base portion 10 commonly referred to as a liner, which is configured by integrally including a square fitting shaft portion 12 as a mounting portion with respect to the tool holder B as a so-called shank in the disc-like portion 11. In addition, various abrasive nonwoven fabrics 15, typically disk-shaped abrasive nonwoven fabrics 15, which are formed of nylon fibers or the like in which the base material is irregularly interlaced and provided with an abrasive or the like, are integrally provided. The tool A is removably attached to the tool holder B so that the square fitting shaft portion 12 is integrally assembled to the square fitting recess 23 of the tool holder B in a fitted state. The configuration can be used.
[0032]
The base portion 10 constituting the tool A has an axial center line tt on an extension line of a line passing through the center of the disc-like portion 11 at the center portion on the upper surface side of the disc-like disc-like portion 11. In this way, the square fitting shaft portion 12 is integrally provided so as to protrude upwardly from the plate-like portion 11. For example, the plate-like portion 11 and the square fitting shaft portion 12 are made of various synthetic resins. It is formed by molding integrally.
[0033]
The rectangular fitting shaft portion 12 provided in the base portion 10 has a cross-sectional shape in a direction perpendicular to the axial center line tt as a polygonal shape, typically a regular polygonal cross-sectional shape. In this case, it has a regular hexagonal cross-sectional shape, and its upper end surface 12a forms a surface perpendicular to the axial center line tt of the rectangular fitting shaft portion 12, and the upper end surface as the protruding end surface The concave portion 14 is provided from the end face 12a toward the base portion of the rectangular fitting shaft portion 12, that is, toward the plate-like portion 11 side.
[0034]
The concave portion 14 provided in the rectangular fitting shaft portion 12 is configured as a circular hole. In this illustrated example, the concave portion 14 is configured around the axial center line tt of the rectangular fitting shaft portion 12. As a circular hole.
That is, in this illustrated example, the axial center line tt of the rectangular fitting shaft portion 12 is configured as a concave portion 14 configured as a center line of a circular hole.
[0035]
In addition, the outer peripheral surface of the rectangular fitting shaft portion 12 is provided with an engaging recess 13 that constitutes one side of the engaging means k in a direction around the outer peripheral surface.
In this illustrated example, the engagement recess 13 provided in the rectangular fitting shaft portion 12 is formed on the rectangular fitting shaft portion 12 so as to go around the axial center line tt of the rectangular fitting shaft portion 12. It is configured as a continuous groove-like shape on the outer peripheral surface, and typically the rectangular fitting shaft portion 12 along a plane orthogonal to the axial center line tt of the rectangular fitting shaft portion 12. A groove-like engagement recess 13 ′ configured as a circular arc-shaped cross section smaller than a semicircle, more typically a groove-like engagement recess 13 ′ having an arc-shaped cross section provided continuously on the outer peripheral surface of the groove. It is configured as.
[0036]
The polishing nonwoven fabric 15 provided in the base portion 10 as a liner having such a configuration is configured and used as having various shapes and materials corresponding to the polishing tool to be configured. For example, various types of synthetic resin fibers A non-woven fabric configured as a three-dimensional network structure that irregularly intersects with a substrate, and various abrasives supported and fixed to this substrate by an adhesive, respectively. For example, the abrasive nonwoven fabric 15 is attached to the surface portion 11a of the base portion 10 using an adhesive to constitute the tool A, or the base portion 10 and the abrasive nonwoven fabric 15 are made of a thermoplastic synthetic resin. At the same time, the abrasive nonwoven fabric 15 is welded to the surface portion 11a of the substrate portion 10 to form the tool A, and the abrasive nonwoven fabric 15 is bonded to the substrate portion 1 by any method. Constitute a tool A is equipped to.
This illustrated example shows a typical example of the provision of the polishing nonwoven fabric 15 to the base portion 10 and has a diameter larger than the surface portion 11a of the disk-like portion 11 in the base portion 10 and is relatively thick. A polishing nonwoven fabric 15 having a circular mat shape is prepared, and is concentric with the circular surface portion 11a, that is, the center line of the polishing nonwoven fabric 15 is the axis center line t of the rectangular fitting shaft portion 12 of the base portion 10. The tool A is configured by being attached to the surface portion 11a so as to be positioned on the same line as -t,
The abrasive nonwoven fabric 15 is made of a thermoplastic synthetic resin fiber, and the base portion 10 provided with the abrasive nonwoven fabric 15 is made of a thermoplastic synthetic resin, and a synthetic resin of thermoplastic synthetic resin fibers constituting the abrasive nonwoven fabric 15 is a substrate. Prepared as a synthetic resin having a melting point higher than that of the synthetic resin constituting the portion 10, and at least the surface portion 11a of the plate-like portion 11 constituting the base portion 10 is in a molten state and pressed against the molten surface portion 11a. The fiber end portion 15a of the polishing nonwoven fabric 15 that has been bitten by the synthetic resin in the molten surface portion 11a is solidified by cooling the synthetic resin of the molten surface portion 11a in the molten state. The tool A is configured so as to be integrally fixed to the portion 10.
In the figure, reference numeral 16 denotes a woven material for reinforcing the abrasive nonwoven fabric 15.
[0037]
The tool holder B used for detachable attachment of the tool A as a typical polishing tool configured by including the abrasive nonwoven fabric 15 on the base body 10 is a rectangular fitting recess that can detachably attach the tool A. 23,
The tool A is held by the tool A so that the square fitting shaft portion 12 of the tool A fitted into the square fitting concave portion 23 does not come out of the square fitting concave portion 23 in the square fitting concave portion 23. And an engaging means k that is detachably engaged with the tool B,
Typically, a square fitting concave portion 23 is provided as the other fitting portion to which the square fitting shaft portion 12 as a fitting portion in the tool A is fitted and assembled, and from the inner wall surface of the square fitting concave portion 23. The engaging sphere 27 urged by the compression coil spring 28 so as to protrude a part of the sphere is provided as the other engaging means k engaged with the engaging recess 13 as the one engaging means k. A holder body 21;
The square fitting recessed portion has a rotation axis xx on the same line as the axial center line tt of the rectangular fitting shaft portion 12 in the tool A fitted to the square fitting recessed portion 23. The holder main body 21 has a rotation shaft 22 that is integrally provided so that the rotation axis xx is on the same line as the center line of 23.
[0038]
A square fitting recess 23 as a fitting portion of the square fitting shaft portion 12 provided in the holder main body portion 21 is on the side opposite to the side where the rotating shaft 22 is provided. 21 is a bottom-stopped square hole provided from the surface 21 toward the rotary shaft 22, specifically, the bottom-stop of a square cross section in which the square fitting shaft portion 12 in the tool A fits closely. When the square fitting shaft portion 12 of the tool A is assembled in the fitting state into the square fitting concave portion 23, the square fitting shaft portion 12 of the tool A is used as the tool holder B. Are provided in such a manner that they can rotate integrally with the tool holder B concentrically with the rotary shaft 22 in FIG.
The square fitting recess 23 provided in the holder main body 21 is typically configured as a square fitting recess 23 having a regular polygonal cross-section corresponding to the square fitting shaft portion 12. In the example shown in the figure, the cross-sectional shape of the square fitting shaft portion 12 that fits closely is configured as a regular hexagonal bottom hole, and the center line of this hole, that is, the center of the polygon. The passing line segment is positioned on the rotation axis xx of the rotary shaft 22, and the axis center line t− of the square fitting shaft portion 12 in the tool A fitted in the square fitting recess 23. The rectangular fitting shaft portion 12 is assembled to the rectangular fitting concave portion 23 so that t is positioned on the rotational axis xx of the rotary shaft 22, and the rectangular fitting concave portion 23 is provided. Bottom surface 23a of the square Line segment passing through the center of the fit recess 23, i.e., are constructed as a surface of a direction perpendicular to the axis of rotation x-x of the rotary shaft 22.
[0039]
The engaging means k provided in the holder main body 21 is the engaging means k in the square fitting shaft 12 of the tool A fitted in the square fitting recess 23 in the holder main body 21. The engagement sphere 27 is detachably engaged with the engagement recess 13, and the engagement sphere 27 is fitted into the square fitting recess 23. A part of the spherical body is provided by a compression coil spring 28 so as to protrude from the inner wall surface of the rectangular fitting recess 23 at a position corresponding to the engagement recess 13 of the shaft portion 12.
[0040]
The engagement means k more typically includes an adjustment screw having an operation hole 26a that stops at the bottom in the axial direction, that is, from one shaft end to the other shaft end, and whose outer peripheral portion is a male screw portion 26b. The engaging sphere is provided with a compression coil spring 28 so that one end is in contact with the bottom side of the operation hole 26a with respect to the operation hole 26a and is urged toward the opening side of the operation hole 26a by the compression coil spring 28. 27, the engaging sphere 27 biased by the compression coil spring 28 is brought into contact with the reduced diameter opening edge of the operation hole 26a, and a part of the sphere less than the hemisphere is operated. In the illustrated example, a female screw hole 25 is provided so as to protrude from the hole 26a in the axial direction, and the adjustment screw 26 provided with the engagement sphere 27 is opened in the inner wall surface of the rectangular fitting recess 23. Is the holder The engaging sphere 27 provided in the adjustment screw 26 is screwed into a female screw hole 25 provided in the body portion 21 so as to be able to advance and retreat, and the square fitting recess 23 of the holder main body portion 21 is formed. The adjustment screw 26 is screwed and positioned with respect to the female screw hole 25 so as to project a part of the sphere from the inner wall surface.
[0041]
In the figure, reference numeral 26c denotes an operation hole for the adjustment screw 26, which is used for screw rotation of the adjustment screw 26 using various tools such as a wrench. In this illustrated example, It is configured as a hexagonal hole.
[0042]
The engaging means k provided in the holder main body 21 is an engaging means provided in the square fitting shaft portion 12 in the tool A to be fitted into the square fitting concave portion 23 of the holder main body 21. The square fitting in the tool A fitted to the square fitting recess 23 is provided at a position where the engagement sphere 27 constituting the engagement means k is conveniently engaged with the engagement depression 13 as k. As long as it is provided in a form that effectively prevents the shaft part 12 from coming out, it may be provided in any form, and the engaging means k provided in the holder main body part 21 is provided by the single adjusting screw 26. It may be configured, or may be configured by a plurality of adjustment screws 26.
[0043]
The engagement means k provided in the tool holder B typically penetrates from the outer peripheral surface of the holder body 21 constituting the tool holder B into the square fitting recess 23 of the tool holder B. The adjustment screw 26 is screwed into each of the female screw holes 25 in the direction orthogonal to the rotation axis xx of the rotary shaft 22 of the tool holder B provided so as to The square fitting shaft portion in the engagement concave portion 13 provided in a series along the outer peripheral surface of the square fitting shaft portion 12 fitted in the square fitting concave portion 23 in a direction around the surface. The rotation axis is communicated between the outer peripheral surface of the holder body 21 and the rectangular fitting recess 23 so as to open one end toward a surface portion orthogonal to the surface including the 12 axial center lines tt. In each female screw hole 25 provided in a direction orthogonal to xx, respectively. In the illustrated example, the adjusting screw 26 is screwed in, and is provided at equal intervals from the three directions of the outer peripheral surface of the holder main body 21 toward the rotation axis xx. Three female screw holes 25 are provided so that each female screw hole 25 opens at the center on the width side of the rectangular surface of the rectangular fitting recess 23 having the regular hexagonal shape. The square fitting shaft portion 12 of the tool A fitted into the square fitting concave portion 23 by the respective engagement spheres 27 provided on the screwed adjustment screw 26 has its axis center line y. The engagement sphere 27 is engaged with the engagement recess 13 serving as the engagement means k in the rectangular fitting shaft portion 12 so that -y can be positioned without deviation on the rotation axis xx of the tool holder B. Removably engage Unishi are.
[0044]
The tool A to be fitted into the square fitting recess 23 in the square fitting recess 23 in the holder main body 21 having such a configuration, more specifically, from the bottom surface 23 a of the square fitting recess 23. Of the rotary shaft 22 of the tool holder B from the fitting shaft portion 24 fitted to the concave portion 14 of the square fitting shaft portion 12, more typically from the bottom surface 23 a of the square fitting concave portion 23. The shaft A has a shaft center line s-s on the rotation axis xx, and is fitted to a concave portion 14 that forms a circular hole of the square fitting shaft portion 12 in the tool A that is fitted into the square fitting concave portion 23. A fitting shaft portion 24 having a truncated cone shape is provided so as to protrude into the rectangular fitting concave portion 23, and the outer peripheral surface of the fitting shaft portion 24 is in close contact with the opening edge of the concave portion 14. And the square fitting shaft portion 12 By fitting in the square fitting recess 23, the square fitting shaft in the tool A is such that the tool A and the tool A rotate integrally with the tool holding tool B. The rotation center line yy of the tool A is rotated in the tool holder B in a state where the axis center line tt of the portion 12 is positioned on the rotation axis xx of the rotation shaft 22 of the tool holder B. It is positioned on the axis xx and is detachably assembled by mutual engagement of the engagement means k.
[0045]
The tool holder B used for attaching the tool A may be configured such that the rotary shaft 22 and the holder main body 21 are integrated with the tool holder B. You may comprise 22 and the holder main-body part 21 by the assembly | attachment of various members.
[0046]
For example, as shown in the illustrated example, the tool holder B is configured by integrally assembling a block member 20 and a shaft member 20 ′ screwed into a female screw hole 20 d provided in the block member 20. The tool holder B configured as an integrated assembly of the block member 20 and the shaft member 20 ′ is used for screwing the rectangular fitting recess 23 and the adjusting screw 25 provided with the fitting shaft portion 24. It can comprise so that each structure of the holder main body part 21 provided with the internal thread hole 25 grade | etc., And the said rotating shaft 22 may be provided.
[0047]
The block member 20 according to the illustrated example has an integrated shape in which the lower side is a disk-shaped portion 20a and the upper side is a truncated cone-shaped portion 20b. The disk-shaped portion 20a and the truncated cone-shaped portion 20b A recess that communicates so as to form a series of holes between the center of the lower end surface 20f of the disc-shaped portion 20a and the center of the upper end surface 20e of the truncated cone portion 20b so that the center line is the center line. 20c and a female screw hole 20d having a smaller diameter than the concave portion 20c, and a plurality of female screw holes 25 communicating between the outer peripheral surface of the disk-shaped portion 20a and the concave portion 20c are formed at the center of the disk-shaped portion 20a. To the radial direction.
[0048]
The recess 20c provided in the block material 20 is recessed in a square hole shape from the lower end surface 20f of the block material 20, that is, the surface of the disk-shaped portion 20a toward the truncated cone-shaped portion 20b, and more specifically. Specifically, the concave portion 20c having a shape and a dimension in which the square fitting shaft portion 12 is fitted, that is, in the illustrated example, the square fitting shaft portion 12 having a hexagonal shape in cross-section is dense. Are formed as hexagonal square hole-shaped recesses 20c that are fitted to each other in a non-rotating state, and communicates between the bottom surface 20g of the recess 20c and the upper end surface 20e of the truncated cone-shaped portion 20b. Thus, the female screw hole 20d is provided so as to leave the bottom surface 20g in a stepped shape at the peripheral edge of the female screw hole 20d.
[0049]
The line passing through the center of the regular hexagonal square hole recess 20c provided in the block member 20 and the center line of the female screw hole 20d are positioned on the same line, and these lines are The block member 20 is positioned on a line passing through the centers of the disc-like portion 20a and the truncated cone-like portion 20b, and is provided so as to communicate between the outer peripheral surface of the disc-like portion 20a and the concave portion 20c. The line passing through the center of the female screw hole 25 passes through the center on the width side of the rectangular inner wall surface constituting the square hole-shaped recess 20c and is orthogonal to the line passing through the center of the disk-shaped part 20a. In this illustrated example, the female screw hole 25 is opened to every other inner wall surface of the six inner wall surfaces forming the rectangular shape constituting the regular hexagonal square hole-shaped recess 20c. The three female screw holes 25 are provided so that the center line of the female screw hole 25 passes through the center of the width (short side) of the inner wall surface and is orthogonal to the line passing through the center of the disk-shaped portion 20a. It is as.
[0050]
The shaft member 20 ′ that is integrally assembled with the block member 20 and constitutes the tool holder B is integrally connected to the shaft portion 20′a and the shaft portion 20′a via the flange portion 20′b. The male threaded portion 20′c is provided with a convex portion 20′d having a truncated cone shape that is continuously provided integrally with the male threaded portion 20′c. 'a, male threaded portion 20'c, and convex portion 20'd are configured to have their respective axial center lines on the same line, and the flange portion 20'b abuts against the upper end surface 20e of the block member 20. Thus, when the male screw portion 20′c is screwed into the female screw hole 20d, the convex portion 20′d protrudes from the bottom surface 20g into the concave portion 20c.
[0051]
The male member 20′c of the shaft member 20 ′ is arranged so that the shaft member 20 ′ having such a configuration abuts the flange 20′b of the shaft member 20 ′ on the upper end surface 20e of the block member 20. The tool holder B is configured by screwing into the female screw hole 20d in the block member 20 and assembling the shaft member 20 ′ and the block member 20 in an integrally fixed state.
[0052]
In this way, the tool holder B constructed by assembling the shaft member 20 ′ to the block member 20 has the shaft portion 20′a as the rotary shaft 22 in the tool holder B and is assembled integrally with each other. The block member 20 and the male screw portion 20′c and the flange portion 20′b to be used as the holder main body portion 21 in the tool holder B, and the concave portion 20c is the square fitting in the tool holder B. The projecting portion 20′d is a fitting shaft portion 24 in the tool holder B, and the tool holder B is easily configured by assembling the block member 20 and the shaft member 20 ′. be able to.
[0053]
The tool holder B may further be configured by assembling other members. For example, the disk-shaped portion 20a and the truncated cone-shaped portion 20b of the block material 20 are separately prepared. Can be configured by assembling various members. For example, the tool holder B can be configured by assembling the shaft member 20 ′ thereto.
[0054]
(2) Tool holding structure according to the second embodiment
Next, the tool holding structure according to the second embodiment shown in FIGS. 7 to 12 will be specifically described.
The tool holding structure according to the second embodiment rotates, for example, as a tool holder provided on a rotary drive shaft, or a tool holder provided on the rotary drive shaft by various holders such as a chuck. The tool holder B provided on the drive shaft side and the tool A used by being attached to the tool holder B have a square fitting recess 23 in either the tool holder B or the tool A. On the other hand, the axial center line tt is positioned on the rotation axis xx of the tool holder B or on a line parallel to the rotation axis xx, and on the rotation axis xx of the tool holder B. And a square fitting shaft portion 12 that is fitted into the square fitting concave portion 23 so as to position the rotation center line yy of the tool A and rotates the tool holder B and the tool A integrally. As a configuration, the square fitting of this square fitting recess 23 By assembling the tool A to the tool holder B so that the shaft portion 12 is fitted, the tool A and the tool A are rotated integrally with the tool holder B. As a configuration that can be assembled to,
Further, the tool holder B and the tool A are fitted into the square fitting shaft portion 12 and the square fitting concave portion 23 by fitting the square fitting shaft portion 12 into the square fitting concave portion 23. The tool is configured to include the engaging means k for releasably engaging the tool so that the square fitting shaft portion 12 fitted to the square fitting concave portion 23 does not come out of the square fitting concave portion 23. The holding tool B and the tool A are configured to be detachably engaged,
Moreover, the tool holder B and the tool A are fitted so that either one of the tool holder B and the tool A has a concave portion 14 and the other has at least a part in close contact with the concave portion 14. In addition to the recess 14, the tool holder B includes a fitting shaft portion 24 that accurately positions the rotation center line yy of the tool A on the rotation axis xx of the tool holder B.
Further, typically, the rectangular fitting shaft portion 12 is positioned so that the axial center line tt of the rectangular fitting shaft portion 12 is positioned on the rotation axis xx of the tool holder B. The concave portion 23 is fitted into the mating concave portion 23 and the fitting shaft portion 24 is positioned so that the shaft center line ss of the fitting shaft portion 24 is positioned on the rotation axis xx of the tool holder B. 14 is configured to be fitted to 14,
The structure of the tool holding structure according to the first embodiment is the same as that of the polishing tool A according to the first embodiment except that the polishing nonwoven fabric 15 ′ is detachably attached to the base portion 10 with the hook-and-loop fastener 17. The configuration is the same as or substantially the same as the configuration, and is assembled and configured in the same manner as in the tool holding structure according to the first embodiment.
Therefore, the same reference numerals are given to the same or substantially the same components as the configuration of the tool holding structure according to the first embodiment, and the description thereof will be omitted.
[0055]
The tool A constituting the tool holding structure according to this embodiment is compared with the base part 10 having the same configuration as the base part 10 in the tool A constituting the tool holding structure according to the first embodiment. Thus, the polishing nonwoven fabric 15 ′ having substantially the same configuration as the polishing nonwoven fabric 15 in the tool A constituting the tool holding structure according to the first embodiment can be engaged and disengaged by the surface fastener 17 that forms a male and female pair. It is configured to be mounted, and is configured so that polishing can be performed by appropriately replacing the polishing nonwoven 15 ′ as a polishing means for the base portion 10 generally called a liner.
[0056]
Abrasive nonwoven fabric 15 'which is engaged with the base portion 10 by a surface fastener 17 and constitutes the tool A has a three-dimensional network having an abrasive and irregularly intermingling various fiber materials corresponding to the object to be polished. It may be configured in various shapes as a body, etc. In this illustrated example, a thick disk-shaped body formed by synthetic resin fibers formed by adhering an abrasive with an adhesive or the like is used. The felt-like polishing nonwoven fabric 15 ′ is formed by providing a male and female one side 17 ′ of the hook-and-loop fastener 17 on the surface opposite to the polishing surface.
[0057]
The base portion 10 that can be provided with the abrasive nonwoven fabric 15 ′ in an engaged state has a configuration other than the configuration in which the abrasive nonwoven fabric 15 ′ is detachably engaged with the tool according to the first embodiment. The structure is the same as that of the base portion 10 in the holding structure, and the axial center line t-t is on the extension line of the line passing through the center of the disc-like portion 11 at the center on the upper surface side of the disc-like disc-like portion 11. And the other side 17 ″ of the hook-and-loop fastener 17 forming the male and female is provided on the lower surface side of the square fitting shaft portion 12 so as to protrude integrally from the disk-like portion 11 upward. For example, the disk-shaped part 11 and the square fitting shaft part 12 are integrally formed of various synthetic resins.
[0058]
The rectangular fitting shaft portion 12 provided in the base portion 10 has a polygonal shape, typically a regular polygonal sectional shape in a direction perpendicular to the axial center line tt. In this case, the cross-sectional shape is a regular hexagon, and the upper end surface 12a is configured to form a surface perpendicular to the axial center line tt of the rectangular fitting shaft portion 12, and the upper end surface as the protruding end surface The concave portion 14 is provided from 12a toward the base portion of the square fitting shaft portion 12, that is, toward the plate-like portion 11 side.
[0059]
In addition, the concave portion 14 provided in the square fitting shaft portion 12 is configured as a circular hole. In this illustrated example, the concave portion 14 is configured around the axial center line tt of the rectangular fitting shaft portion 12. As a round hole.
That is, in this illustrated example, the axial center line tt of the rectangular fitting shaft portion 12 is configured as a concave portion 14 configured as a center line of a circular hole.
[0060]
In addition, the outer peripheral surface of the rectangular fitting shaft portion 12 is provided with an engaging recess 13 that constitutes one side of the engaging means k in a direction around the outer peripheral surface.
In this illustrated example, the engagement recess 13 provided in the rectangular fitting shaft portion 12 is formed on the rectangular fitting shaft portion 12 so as to go around the axial center line tt of the rectangular fitting shaft portion 12. It is configured as a continuous groove-like shape on the outer peripheral surface, and typically the rectangular fitting shaft portion 12 along a plane orthogonal to the axial center line tt of the rectangular fitting shaft portion 12. A groove-like engagement recess 13 ′ configured as a circular arc-shaped cross section smaller than a semicircle, more typically a groove-like engagement recess 13 ′ having an arc-shaped cross section provided continuously on the outer peripheral surface of the groove. It is configured as.
[0061]
The other side of the male and female hook-and-loop fastener 17 provided on the polishing nonwoven fabric 15 ′ is engaged with one side 17 ″ of the male and female hook-and-loop fastener 17 provided on the base body 10 having such a configuration. Then, the polishing tool A is configured by attaching the polishing nonwoven fabric 15 ′ to the base portion 10.
[0062]
The tool holder B to which the tool A configured as described above is assembled is a tool holder B having the same configuration as the tool holder B in the tool holding structure according to the first embodiment. The tool A in the tool holding structure according to the second embodiment can be detachably assembled to the tool holder B in the same manner as in the tool holding structure according to the embodiment. More specifically, the base 10 constituting the tool A is assembled to the tool holder B in a state where the abrasive nonwoven 15 ′ is provided, or the abrasive nonwoven 15 ′ is used. Assembling is performed in a detached state, and a polishing nonwoven fabric 15 ′ is engaged with the base portion 10 and used.
[0063]
【The invention's effect】
In the holding structure of the tool according to the present invention, the tool holder and the tool have a concave portion that is square-fitted into one of the tool holder and the tool, and the other is on the rotation axis of the tool holder. A square fitting shaft portion that is fitted into the square fitting recess so as to position the rotation center line of the tool, and the tool holder is provided in the square fitting shaft portion and the square fitting recess. Engagement means for releasably engaging the tool by fitting the square fitting shaft portion into the square fitting concave portion;
In addition, the tool holder and the tool are fitted into the concave portion in one of the tool holder and the tool, and the other is fitted into the concave portion, and on the rotation axis of the tool holder together with the concave portion. Since the fitting shaft portion for positioning the rotation center line of the tool is provided, by fitting the rectangular fitting shaft portion into the rectangular fitting recess so as to fit the fitting shaft portion into the recess, The tool is detachably attached to the tool holder so that the tool and the tool holder rotate together, and the rotation center line of the tool is aligned with the rotation axis of the tool holder. The tool can be attached to the tool holder.
In addition, the tool holding structure configured as described above has an advantage that no loosening occurs in the mounting of the mounting tool even when the tool is rotationally driven in any direction. ing.
[0064]
Further, in the tool holding structure according to the above configuration, the rectangular fitting shaft portion is fitted into the rectangular fitting concave portion so that the axial center line of the rectangular fitting shaft portion is positioned on the rotation axis of the tool holder. And the fitting shaft portion is fitted to the recess so as to position the axial center line of the fitting shaft portion on the rotation axis of the tool holder. When the tool is used, there is an advantage that the rotation center line of the tool can be positioned as much as possible on the rotation axis of the tool holder.
[0065]
Further, in the tool holding structure according to the above configuration, the engaging means is biased by a compression coil spring so that a part of a sphere protrudes from the inner wall surface of the rectangular fitting concave portion into the rectangular fitting concave portion. The tool is held by the tool by holding the engagement sphere provided and an engagement recess provided on the outer peripheral surface of the square fitting shaft portion and detachably engaged with the engagement sphere. It has the advantage that it can be smoothly attached to and removed from the tool.
[0066]
Further, in the tool holding structure according to the above configuration, the engagement sphere projects a part of the sphere from the operation hole in the axial direction into the operation hole in the adjustment screw having the operation hole in the axial direction. And the adjustment screw is screwed into a female screw hole opened in the inner wall surface of the concave portion of the rectangular fitting so as to be able to advance and retract. It has the advantage that the tool and the tool can be detachably assembled in a convenient engaged state.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of a tool holder constituting a tool holding structure according to a typical first embodiment and a tool partially separated.
FIG. 2 is a side view showing a state in which the tool is assembled to a tool holder, with a part of the tool holder omitted and a major part broken away.
FIG. 3 is a cross-sectional plan view of the tool assembled to a tool holder
FIG. 4 is a side view showing the main part of the tool holder with a part thereof broken away.
[Figure 5] Plan view of the tool
FIG. 6 is a side view showing a part of the tool broken away.
FIG. 7 is a perspective view showing a main part of a tool holder constituting a tool holding structure according to a typical second embodiment and a tool partially separated.
FIG. 8 is a side view showing a state in which the tool is assembled to a tool holder, with a part of the tool holder omitted and a major part broken away.
FIG. 9 is a plan sectional view of the tool assembled to a tool holder.
FIG. 10 is a side view showing the main part of the tool holder with a part thereof broken away.
FIG. 11 is a plan view of the tool.
FIG. 12 is a side view showing a part of the tool broken away.
[Explanation of symbols]
A tool
B Tool holder
k engagement means
12 Square fitting shaft
13 Engaging recess
14 recess
23 Recessed square fitting
24 Fitting shaft
26 Adjustment screw
27 Engagement sphere
28 Compression coil spring

Claims

The tool holder includes a square fitting recessed portion, and the tool includes a square fitting shaft portion fitted into the square fitting concave portion, and
The square fitting shaft and the square fitting recess are detachably engaged with the tool holder and the tool by fitting the square fitting shaft into the square fitting recess. Engaging means,
In addition, the square fitting shaft portion includes a concave portion having a circular hole shape from the upper end surface of the square fitting shaft portion toward the base,
And the said square fitting recessed part is fitted in the said circular hole-shaped recessed part from the bottom face of this square fitting recessed part in the said square fitting recessed part, and the said recessed part and said rotation axis line of said tool holder A holding structure for a tool, characterized in that the tool holding structure is provided so as to protrude a fitting shaft portion having a truncated cone shape for positioning a rotation center line of the tool.

An engagement sphere that is provided with an engagement sphere biased by a compression coil spring so that a part of the sphere protrudes from the inner wall surface of the square fitting recess into the square fitting recess; and the square fitting 2. The tool holding structure according to claim 1, wherein the holding structure is provided as an engaging recess that is provided on an outer peripheral surface of the mating shaft portion and is detachably engaged with the engaging sphere.

The engagement sphere is provided in the operation hole of the adjustment screw having an operation hole in the axial direction, and is biased by a compression coil spring so that a part of the sphere protrudes from the operation hole in the axial direction. The tool holding structure according to claim 2, wherein the adjustment screw is screwed into a female screw hole opened in an inner wall surface of the rectangular fitting recess so as to be able to advance and retract.