【０００１】
【発明の属する技術分野】
本発明は、把手の自由戻り用ラチェット型の手工具に関する。
【０００２】
【従来の技術】
ラチェット機構を有するレンチやスパナでナットやボルトなどの締具を締結する場合に、仮締め状態（締込み初期）の締具は、ラチェットの空転摩擦力より螺合摩擦力（締付力）が小さいため、空転方向へ一緒に共回りすることとなり、レンチやスパナ全体を締込み方向にのみ回すか、作業者が手で締具を締込むなどの作業が強いられ、作業能率が悪いものであった。
そこで、ラチェット歯車板とソケット間に、ラチェット歯車板と共回りするように、該ラチェット歯車板に突設する矩形断面の棒体状の連結部にその矩形孔部を嵌合した補助回転板を設け、締具の締込み初期では該補助回転板を指で送りながら回転させる発明（特開０８−１４１９２０号）が提案されている。
また、一方の手で握ったレンチの把持部を回転させずに、前記締具に係合するソケット部に固定したノブ部材を回転し、その手を持ち変えて把持部を回転させる発明（特開２００１−３４７４６５号）が提案されている。
ところで、前者（特開０８−１４１９２０号発明）は、補助回転板の外周面に設けられた滑り止め部が、図面から判断しても浅い溝部であり、指で送りながら回転させるとは言うものの、油に汚れた手ではその指１本で回すには難しいものであり、後者（特開２００１−３４７４６５号発明）では、ノブ部材をソケット部の端にネジ締め固定するものであるから、既存のソケット部への取着ができない点で難点があり、さらに、該ノブ部材は掌に握られて使用されるものであるため、締込み初期ではノブ部材と把持部の持ち変えなどの煩わしい面もある上、ノブ部材の周縁の形状は、把持部を握った手の指１本で操作する技術思想で達成されたものではない。
【０００３】
【発明が解決しようとする課題】
本発明は上記従来技術に鑑みて、ボルトやナット等の締具の締込み初期（又は緩め終期）において、ラチェット機構の空転摩擦力に左右されることなく、締込み（又は緩め）できる回転手段を設けたラチェット型締付工具において、該回転手段が把手（把持部）を握った手の指１本で回転され得るラチェット型締付工具及び該工具用回転手段を提供するものである。
【０００４】
【課題を解決するための手段】
すなわち、第１発明のラチェット型締付工具は、把持部に一体の頭部において、該頭部に内蔵されるラチェット機構により、一方向へ回転力を伝達する回転軸に回転手段を設けて成るラチェット型締付工具において、
回転手段が所要肉厚の盤体の周縁に花弁状に複数片突出する長尺な突出片と、溝底を前記頭部外周近傍に配して該突出片間に連続して設けられる深い係止溝と、中心部で垂下され、前記回転軸の締具への嵌着孔に嵌着する所要形状の短尺な嵌着部とから成る。
第２発明のラチェット型締付工具は、第１発明のラチェット型締付工具において、
回転手段の嵌着部が弾性変形自在で所要の摩擦力を有して成る。
第３発明のラチェット型締付工具は、第１発明又は第２発明のラチェット型締付工具において、
回転手段の嵌着部が中央部軸心方向に沿って、所要締具の軸部を挿通させる挿通孔を有して成る。
第４発明のラチェット型締付工具は、把持部に一体の頭部において、該頭部に内蔵されるラチェット機構により、一方向へ回転力を伝達する回転軸に回転手段を設けて成るラチェット型締付工具において、
回転手段が所要肉厚の盤体の周縁に花弁状に複数片突出する長尺な突出片と、溝底を前記頭部外周近傍に配して該突出片間に連続して設けられる深い係止溝と、中心部に配設され、前記回転軸に外嵌する所要形状の係合孔とから成る。
第５発明のラチェット型締付工具は、第４発明のラチェット型締付工具において、
回転手段の係合孔が弾性変形自在で所要の摩擦力を有して成る。
また、第６発明のラチェット型締付工具は、把持部に一体の頭部において、該頭部に内蔵されるラチェット機構により、一方向へ回転力を伝達する回転軸に、ボルト、ナット等の締具に係合する係合孔を有するソケットを着脱自在に係合して成るラチェット型締付工具において、
前記ソケットの外周に回転手段が着脱自在に係合され、該回転手段が所要肉厚の盤体の周縁に花弁状に複数片突出する長尺な突出片と、溝底を前記頭部外周近傍に配して該突出片間に連続して設けられる深い係止溝と、中心部に配設され、前記ソケットに外嵌する弾性変形自在で所要の摩擦力を有する係合孔とから成る。
さらに、第７発明のラチェット型締付工具用回転手段は、所要肉厚の盤体の周縁に花弁状に複数片突出する長尺な突出片と、溝底を前記頭部外周近傍に配して該突出片間に連続して設けられる深い係止溝と、中心部で垂下され、前記回転軸の締具への嵌着孔に嵌着する所要形状の短尺な嵌着部とから成る。
さらに、第８発明のラチェット型締付工具用回転手段は、第７発明のラチェット型締付工具用回転手段において、
回転手段の嵌着部が弾性変形自在で所要の摩擦力を有して成る。
さらに、第９発明のラチェット型締付工具用回転手段は、第７発明又は第８発明のラチェット型締付工具用回転手段において、
回転手段の嵌着部が中央部軸心方向に沿って、所要締具の軸部を挿通させる挿通孔を有して成る。
さらに、第１０発明のラチェット型締付工具用回転手段は、所要肉厚の盤体の周縁に花弁状に複数片突出する長尺な突出片と、溝底を前記頭部外周近傍に配して該突出片間に連続して設けられる深い係止溝と、中心部に配設される所要形状の係合孔とから成る。
さらに、第１１発明のラチェット型締付工具用回転手段は、第１０発明のラチェット型締付工具用回転手段において、
回転手段の係合孔が弾性変形自在で所要の摩擦力を有して成る。
【０００５】
【発明の実施の形態】
回転手段における嵌着部は、材質面では盤体と同一材質で一体に成形されるものから、ゴム質系のもので該盤体に接着又はビス止めなどで接合されるものなどであり、形状や構造面では、締具へ嵌着される回転軸の嵌着孔に嵌着する多角形状の外周輪郭を形成するものや、該外周輪郭を円錐台状に形成するもの、或は中心部軸心方向に沿って締具の軸部を挿通させるための挿通孔を配設するもの、このほか、該挿通孔の中心から放射状に外周輪郭に向けて分割溝を均等に配設したものなどである。
したがって、材質と該材質に相応する形状との関係では、前記盤体と同一材質で一体に成形される嵌着部は、該盤体の回転時に要求される剛性（ラチェットの空転摩擦力に抗する強度）を有するものであるから、その外周輪郭は前記の多角形状に形成されるものであり、ゴム質系のもので盤体に接合される嵌着部は、その外周輪郭が円錐台状（剛性の程度によっては多角形状でも可）に形成されて、締具への嵌着孔に対して所要の締代を介して前記ラチェットの空転摩擦力に抗する摩擦力を発現させるものであり、さらには、外周輪郭を円錐台状に形成するとともに、中心部に前記挿通孔を配設し、その周部を内外に切断した分割溝により、締具への嵌着孔に圧入した時の弾性変形を許容し、その反力によってラチェットの空転摩擦力に抗する摩擦力を発現させるものなどである。
また、回転手段における盤体の中心部に配設される係合孔は、材質面では該盤体と同一材質で一体に成形されるものから、ゴム質系のもので該盤体に接着又はビス止め、或は盤体に開口した嵌着口にその周縁が嵌着されるなどの係合部に形成されるものなどであり、形状面では、回転軸に形成される横断面視矩形の棒体状の連結部に嵌着する角孔や多角形状のものから丸孔まで選択され、構造的には前記盤体と一体で同一肉厚の深さであるものから、該盤体に一体のボス部を含む深さを有するもの、及び盤体に接合されるゴム質系のリング状の係合部に内設されるもの、ゴム質系の縦断面視逆皿状に形成された係合部に内設されるもの、前記逆皿状に形成された係合部の底面に配設した分割片の開口内周面で形成されるものなどである。
さらに、盤体の周縁に花弁状に突出する複数片の突出片は、その突出外径が８０ｍｍ前後で、溝底配設径が５０ｍｍ前後であり、その数は８個が指１本で回転するには好都合のものである。
【０００６】
【実施例】
本発明のラチェット型締付工具用回転手段としての回転盤ａについて、図面を参照して具体的に説明すると、図１（ａ）に示すように、厚さ２ｍｍの硬質プラスチック製（アルミ製など他の所要剛性を有する材質をも可とする。）の盤体１の周縁には花弁状に８個の長尺（突端外径寸法８２ｍｍ）な突出片２を突設するとともに、各突出片２の間に溝底配設径を４８ｍｍとして、人差し指或は親指の何れかの指１本を係止できる溝幅を形成する係止溝３を連続して設け、中心部には図１（ｂ）に示すように、所要テーパ（１／１２〜１／６）の逆円錐台状でゴム質の弾性変形自在で短尺な嵌着部４を、中心に凹設した取付け孔５を介してビスとナットで接合してなる。
また、回転盤ａは図２に示すように、前記ゴム質の嵌着部４に代えて、盤体１と同一材質で一体の所要対面寸法の六角柱状の嵌着部６を垂下したものでも提供される。
さらに、回転盤ａは図３に示すように、嵌着部４、６に締具の軸部を挿通させる挿通孔７を貫設したものとしても提供されるものであり、分図（ａ）に示したものは、盤体１と同一材質で一体に垂下され、輪郭形状が多角形状の嵌着部６に、前記挿通孔７を該盤体１をも貫通して設けたものであり、分図（ｂ）に示したものは、盤体１の中心に開口した嵌着口８にゴム質の嵌着部４の縮径部を内嵌し、該嵌着部４の盤体１の下面に垂下する部分を所要に縮径する円錐面９とするとともに、中心部に前記挿通孔７を貫設したものである。
なお、分図（ｃ）に示したものは、分図（ｂ）で示した嵌着部４の円錐面９を形成した下部に、その軸心に沿って挿通孔７の中心から放射状に該円錐面９に向けて所要均等の分割溝１０を配設したものである。
【０００７】
次に、回転盤ｂについて説明すると、図４に示すように、厚さ２ｍｍの硬質プラスチック製（アルミ製など他の所要剛性を有する材質をも可とする。）の盤体１の周縁には花弁状に８個の長尺（突端外径寸法８２ｍｍ）な突出片２を突設するとともに、各突出片２の間に溝底配設径を４８ｍｍとして、人差し指或は親指の何れかの指１本を係止できる溝幅を形成する係止溝３を連続して設け、中心部には、分図（ａ）に示したものは、所要孔径の角孔からなる係合孔１１が貫設され、分図（ｂ）に示したものは、所要対面寸法の六角孔からなる係合孔１１が貫設されたものであり、分図（ｃ）に示したものは、前記の係合孔１１が盤体１の下面に一体に垂下されたボス部１２を含んで貫設されたものである。このほか、係合孔１１を丸孔としても提供される。
また、図５に示した回転盤ｂについて説明すると、分図（ａ）に示したものは、図４に示す平面形状で、係合孔１１が盤体１の下面に接合されるゴム質のリング状の係合部１３の内周面に形成された、弾性変形自在な丸孔であり、分図（ｂ）に示したものは、分図（ａ）と同一平面形状で、係合孔１１が盤体１の下面に接合されるゴム質の逆皿状の係合部１３の内周面に形成された、弾性変形自在な丸孔である。
さらに、分図（Ａ）に示したものは、前記分図（ａ）に示した係合孔１１を、盤体１の中心に貫設した挿通孔７に連通させたものであり、分図（Ｂ）に示したものは、前記（ｂ）に示した係合孔１１を、係合部１３の底面から盤体１を貫通して設けた挿通孔７に連通させたものである。
さらに、図６に示した回転盤ｂについて説明すると、分図（ｂ）に示すように、盤体１の中心に開口した嵌着口８にゴム質で逆皿状の凹部を形成した係合部１３の縮径部（断面コ形のリング溝部）を内嵌し、その底面１４に分図（ａ）に示すように、中心から放射状に内周面に向けて８分割の分割片１５を刻設して成るものであり、この場合の係合孔１１は、前記凹部の内周面及び該分割片１４の開口内周面に形成されるのである。
【０００８】
次に、本発明のラチェット型締付工具Ａについて図面を参照して具体的に説明すると、図７に示すように、両端の頭部１６と、両頭部１６を一体とする把持部１７とから成り、各頭部１６にラチェット機構（図外）により一方向へ回転する回転軸１８を軸支し、該回転軸１８の中央部にボルトやナットなどの締具に嵌着して回転締付力を伝達する嵌着孔１９を貫設し、両軸端を頭部１６の上下面よりそれぞれ所要に突出して成るラチェット型締付工具において、所要頭部１６の締付けに使用しない側（上側）の嵌着孔１９に、前記回転盤ａの該嵌着孔１９に見合う逆円錐台状の嵌着部４を所要の押圧力で着脱自在に押込み嵌着して成る。
したがって、前記回転盤ａの嵌着部４は弾性変形しつつ嵌着孔１９に押込まれるから、両者間にラチェット機構の空転摩擦力より大なる摩擦力が発現し、しかも、各突出片２が頭部１６の外周よりかなり長く突出しているから、把持部１７を握る手の人差し指又は親指の何れか１本の指を回転盤ａの係止溝３に係止し、突出片２にこの指１本を掛けて引き込めば該回転盤ａはその分回転し、順次に繰り出される突出片２を指１本で引き込むことにより、回転盤ａは断続的に回転するのである。
その結果、回転軸１８は摩擦力によって回転盤ａと共回りし、締付け初期状態であれば、極めて簡単に締具を締付けでき、緩め終期であれば同様に簡単に締具を脱却できるのである。
【０００９】
また、本発明のラチェット型締付工具Ｂを実施例により説明すると、図８に示すように、両端の頭部１６と、両頭部１６を一体とする把持部１７とから成り、各頭部１６にラチェット機構（図外）により一方向へ回転する回転軸１８を軸支し、該回転軸１８の中央部にボルトやナットなどの締具に嵌着して回転締付力を伝達する嵌着孔１９を貫設し、両軸端を頭部１６の上下面よりそれぞれ所要に突出して成るラチェット型締付工具において、所要頭部１６の締付けに使用しない側（上側）の軸端外周に、前記回転盤ｂの盤体１の下面に接合したゴム質で逆皿状の係合部１３の内周面に形成された係合孔１１を弾性変形させつつ押圧外嵌して成る。
したがって、このラチェット型締付工具Ｂにおいても、係合孔１１において回転軸１８と所要の摩擦力で回転盤ｂが接合されるから、頭部１６の持ち変えや両手を使用することなく、極めて簡単に指１本で締具の初期締込み、脱却ができるのである。
【００１０】
さらに、ラチェット型締付工具Ｂの他の実施例について説明すると、図９に示すように、一端の頭部１６と、該頭部１６に一体の把持部１７とから成り、該頭部１６にラチェット機構（図外）により一方向へ回転する回転軸１８を軸支し、該回転軸１８の中央部にボルトやナットなどの締具に嵌着して回転締付力を伝達する嵌着孔１９を貫設し、両軸端を頭部１６の上下面よりそれぞれ所要に突出して成るラチェット型締付工具において、回転軸１８の締付けに使用しない側（上側）の軸端外周に、前記図６に示した回転盤ｂの係合部１３の凹部を外嵌するとともに、底面１４の分割片１５を弾性変形によりこじあけてその開口内周面を係合孔１１として所要の摩擦力を発現させて接合して成る。
したがって、前記摩擦力を介して回転軸１８が回転盤ｂの回転と共回りし、極めて簡単に分図（ｃ）に示すように、人差し指の指１本で締具の初期締込み、脱却（図外の親指の操作による）ができるのである。
【００１１】
図１０に示したラチェット型締付工具ｃについて説明すると、一端の頭部１６と、該頭部１６に一体の把持部１７とから成り、該頭部１６にラチェット機構（図外）により一方向へ回転する回転軸１８を軸支し、該回転軸１８の下方軸端を角軸２０として垂下し、該角軸２０に円筒状のソケット２１を嵌着し、該ソケット２１の下方に締具への嵌着孔１９を形成して成るラチェット型締付工具において、前記ソケット２１の外周に前記図６に示した回転盤ｂの係合部１３の凹部を外嵌するとともに、底面１４の分割片１５をこじあけてその開口内周面を係合孔１１として所要の摩擦力（空転摩擦力より大なる摩擦力）を発現させて接合して成る。
この場合は、回転盤ｂが頭部１６の下側に位置するものであるが、分図（ｂ）に示すように、ソケット２１の上部に回転に関与する突出片２と係止溝３を配設した盤体１があるので、把持部１７を握った状態で人差し指又は親指の何れか１本の指使用には支障がないのである。
なお、締具の初期締込みの場合、右ネジであればラチェット機構の切り換えにより、把持部１７の右回転が回転締付力伝達となり、左回転が空転摩擦力を伴った空転として操作されるが、このとき、締具への結合に関与する回転軸１８は右回転フリーであるから右利きの者であれば右手の人差し指で回転盤ｂの突出片２を引き込んで回転軸１８を右回転させ、初期締込みを迅速に処理し、回転盤ｂがスリップする時点から把持部１７による本締めとなり、緩め終期では、ラチェット機構の切り換えにより、把持部１７の左回転が回転力伝達となり、回転軸１８は左回転フリーであるから、右手の親指で突出片２を引き込み回転軸１８を左回転させて締具を迅速に脱却できるのである。左利きの者であれば、同一締具の条件下では、前記人差し指と親指の使い方が逆となり、初期締込み時の右回転では親指を使い、緩め終期では人差し指により左回転させるものである。
このほか、頭部１６にラチェット機構（図外）を介して軸支される回転軸１８に、上下からそれぞれ所要サイズの締具への嵌着孔１９を連通したものでは、ボルトの軸部を上方に突出させた状態のナットを締込んだり、緩めたりできるものであるから、そのような場合には、図５の分図（Ａ）、（Ｂ）に示すような、係合部１３に前記軸部を挿通できる挿通孔７を盤体１と共に貫設した回転盤ｂを装着したラチェット型締付工具や、回転軸１８に垂下する角軸２０にソケット２１を接合するラチェット型締付工具において、該ソケット２１と頭部下面間で該角軸２０に前記図４（ａ）で示した回転盤ｂを嵌着したラチェット型締付工具なども提供され得るものである。
要は、人差し指か親指の何れか１本の指で回転できる回転盤ａ、ｂを、従来のラチェット型締付工具の回転軸１８の軸端（丸軸、角軸、その他多角形軸等の軸端）に外嵌接合したり、該回転軸１８の中心部に配設される締具への嵌着孔１９に嵌着又は押圧嵌着したり、回転軸１８に接合するソケット２１に外嵌接合したラチェット型締付工具が、本発明で提供しようとするものであり、本実施例で示したものは、その一例に過ぎないものである。また、本発明の回転盤は、従来から提供されているラチェット型締付工具の各能力に対応して嵌着部４、６や係合孔１１が各種の仕様で提供されるのであるから、既存の該工具に即応して使用できるものであり、実用上極めて有益である。このほか、回転盤ｂをソケット２１に一体に接合したものなどは、本発明から容易に想起され得るものである。
【００１２】
【発明の効果】
以上のように本発明によれば、回転盤においては、従来のラチェット型締付工具の回転軸の軸端の外径又は内径等の仕様に対応して提供されるから、既存の前記工具に即応して使用できる上、突出片と突出片間の係止溝に人差し指か親指の何れか１本の指が係止され、該突出片をその指１本で順次に引き込みながら回転できるから、簡単確実に締具の初期締込み、脱却に極めて実用上有益に寄与するものであり、また、該回転盤を装着したラチェット型締付工具においては、把持部を握る手を持ち変えることなく、握ったままの手の指１本で締具の初期締込み、脱却ができるから作業能率も特段に向上するものである。
【図面の簡単な説明】
【図１】本発明の回転盤ａの説明図で、（ａ）はその平面図であり、（ｂ）は（ａ）のＡ−Ａ矢視断面図である。
【図２】同回転盤ａの他の実施例を示し、天地を逆にした斜視図である。
【図３】同回転盤ａのさらなる他の実施例を示し、（ａ）は盤体１と嵌着部６とが一体で中心に挿通孔７を貫設したものの縦断面図であり、（ｂ）は盤体１に嵌着部４を接合し、中心に挿通孔７を貫設したものの縦断面図であり、（ｃ）は（ｂ）において嵌着部４に分割溝１０を配設したものである。
【図４】本発明の回転盤ｂの説明図であり、（ａ）、（ｂ）はその平面図であり、（ｃ）は盤体１にボス部１２を垂下した場合の縦断面図である。
【図５】同回転盤ｂの他の実施例を示す説明図であり、（ａ）、（ｂ）はその縦断面図であり、（Ａ）、（Ｂ）はそれぞれ（ａ）、（ｂ）のものに挿通孔７を貫設したものである。
【図６】同回転盤ｂのさらなる他の実施例を示す説明図であり、（ａ）はその平面図であり、（ｂ）はその縦断面図である。
【図７】本発明のラチェット型締付工具Ａの説明図であり、（ａ）はその平面図であり、（ｂ）は（ａ）の正面図である。
【図８】本発明のラチェット型締付工具Ｂの説明図であり、（ａ）はその平面図であり、（ｂ）は（ａ）の正面図である。
【図９】同ラチェット型締付工具Ｂの他の実施例としての説明図であり、（ａ）はその平面図であり、（ｂ）は（ａ）の正面図であり、（ｃ）は使用状態の平面図である。
【図１０】同ラチェット型締付工具ｃの説明図であり、（ａ）はその平面図であり、（ｂ）は（ａ）の正面図である。
【符号の説明】
１ 盤体
２ 突出片
３ 係止溝
４ 嵌着部
５ 取付け孔
６ 嵌着部
７ 挿通孔
８ 嵌着口
９ 円錐面
１０ 分割溝
１１ 係合孔
１２ ボス部
１３ 係合部
１４ 底面
１５ 分割片
１６ 頭部
１７ 把持部
１８ 回転軸
１９ 嵌着孔
２０ 角軸
２１ ソケット
ａ、ｂ、 回転盤
Ａ乃至Ｃ ラチェット型締付工具[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ratchet-type hand tool for free return of a handle.
[0002]
[Prior art]
When fastening fasteners such as nuts and bolts with a wrench or spanner that has a ratchet mechanism, the fasteners in the temporarily tightened state (initial tightening) will have a higher threading friction force (tightening force) than the idle frictional force of the ratchet. Since it is small, it will rotate together in the idling direction, and the work such as turning the entire wrench or spanner only in the tightening direction or manually tightening the fastener by the operator is forced, and the work efficiency is poor. there were.
Therefore, between the ratchet gear plate and the socket, an auxiliary rotating plate having its rectangular hole fitted to a rod-shaped connecting portion having a rectangular cross section protruding from the ratchet gear plate so as to rotate with the ratchet gear plate. An invention has been proposed in which the auxiliary rotating plate is rotated while being fed by a finger in the initial stage of tightening the fastener (Japanese Patent Application Laid-Open No. 08-141920).
Also, an invention is disclosed in which a knob member fixed to a socket portion engaged with the fastener is rotated without rotating the grip portion of the wrench held by one hand, and the grip portion is rotated by holding the hand. No. 2001-347465) has been proposed.
By the way, in the former (the invention of Japanese Patent Application Laid-Open No. 08-141920), although the non-slip portion provided on the outer peripheral surface of the auxiliary rotating plate is a shallow groove portion as judged from the drawing, it is rotated while being fed by a finger. However, it is difficult to turn an oily hand with one finger, and in the latter case (the invention of JP-A-2001-347465), the knob member is screwed and fixed to the end of the socket. There is a drawback in that the knob member cannot be attached to the socket portion, and furthermore, since the knob member is used by being held by the palm, it is troublesome to change the knob member and the grip portion in the initial stage of tightening. In addition, the shape of the peripheral edge of the knob member is not achieved by the technical idea of operating with one finger of the hand holding the grip.
[0003]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION In view of the above prior art, the present invention provides a rotating means which can be fastened (or loosened) at the initial stage (or at the end of loosening) of fasteners such as bolts and nuts without being affected by the idling frictional force of the ratchet mechanism. The present invention provides a ratchet type tightening tool provided with a ratchet type tightening tool, wherein the rotating means can be rotated by one finger of a hand holding a handle (grip), and a rotating means for the tool.
[0004]
[Means for Solving the Problems]
That is, the ratchet-type tightening tool of the first invention is provided with a rotating means provided on a rotating shaft for transmitting a rotating force in one direction by a ratchet mechanism built in the head on a head integrated with the gripping portion. In ratchet type fastening tools,
A long protruding piece in which a rotating means protrudes in a petal shape from the periphery of the board body having a required thickness, and a deep engagement provided continuously between the protruding pieces by disposing a groove bottom near the outer periphery of the head. It has a stop groove and a short fitting portion of a required shape that is suspended at the center and fits into a fitting hole of the rotating shaft to the fastener.
The ratchet-type tightening tool of the second invention is the ratchet-type tightening tool of the first invention,
The fitting portion of the rotating means is elastically deformable and has a required frictional force.
The ratchet-type fastening tool according to the third invention is the ratchet-type fastening tool according to the first invention or the second invention,
The fitting portion of the rotating means has an insertion hole for inserting the shaft portion of the required fastener along the center axis direction.
A ratchet-type tightening tool according to a fourth aspect of the present invention is a ratchet-type tightening tool in which a rotating means is provided on a rotating shaft that transmits rotational force in one direction by a ratchet mechanism built in the head on a head integrated with the gripping portion. In fastening tools,
A long protruding piece in which a rotating means protrudes in a petal shape from the periphery of the board body having a required thickness, and a deep engagement provided continuously between the protruding pieces by disposing a groove bottom near the outer periphery of the head. It has a stop groove and an engagement hole of a required shape which is provided at the center and which is fitted to the rotating shaft.
The ratchet-type fastening tool according to a fifth invention is the ratchet-type fastening tool according to the fourth invention,
The engaging hole of the rotating means is elastically deformable and has a required frictional force.
Further, the ratchet type tightening tool according to the sixth aspect of the present invention provides a head integrated with the gripping portion, wherein a ratchet mechanism incorporated in the head is provided with a rotating shaft for transmitting a rotating force in one direction to a rotating shaft such as a bolt or a nut. A ratchet-type fastening tool comprising a socket having an engagement hole for engaging with a fastener, which is removably engaged.
A rotating means is detachably engaged with the outer periphery of the socket, and the rotating means projects a plurality of petal-like long projecting pieces on the peripheral edge of the board having a required thickness, and a groove bottom near the outer periphery of the head. And a deep locking groove provided continuously between the protruding pieces and an engaging hole provided at the center and elastically deformable and having a required frictional force which is externally fitted to the socket.
Further, the rotating means for the ratchet-type fastening tool of the seventh invention is characterized in that a plurality of long projecting pieces protruding in a petal shape from the periphery of a board having a required thickness and a groove bottom are arranged near the outer periphery of the head. And a deep engaging groove continuously provided between the protruding pieces, and a short fitting portion of a required shape which is suspended at a central portion and which fits into a fitting hole of the rotating shaft to the fastener.
Further, the rotating means for the ratchet type fastening tool according to the eighth invention is the rotating means for the ratchet type fastening tool according to the seventh invention,
The fitting portion of the rotating means is elastically deformable and has a required frictional force.
Further, the rotating means for the ratchet-type fastening tool according to the ninth invention is the rotating means for the ratchet-type fastening tool according to the seventh or eighth invention,
The fitting portion of the rotating means has an insertion hole for inserting the shaft portion of the required fastener along the center axis direction.
Furthermore, the rotating means for a ratchet-type fastening tool of the tenth invention is characterized in that a plurality of long projecting pieces protruding in a petal shape from the periphery of a board body having a required thickness and a groove bottom are arranged near the outer periphery of the head. And a deep locking groove continuously provided between the protruding pieces, and an engaging hole of a required shape provided at the center.
Further, the rotating means for the ratchet type fastening tool of the eleventh invention is the rotating means for the ratchet type fastening tool of the tenth invention,
The engaging hole of the rotating means is elastically deformable and has a required frictional force.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
The fitting portion in the rotating means is, from the material side, integrally formed of the same material as the board body, from a rubber-based one which is bonded to the board body by bonding or screwing, and the like. On the other hand, in terms of structure, a polygonal outer contour formed in a fitting hole of a rotary shaft to be fitted to a fastener, a truncated conical shaped outer contour, or a central shaft One in which an insertion hole for inserting the shaft portion of the fastener along the center direction is provided, and one in which division grooves are uniformly arranged radially from the center of the insertion hole toward the outer peripheral contour. is there.
Therefore, according to the relationship between the material and the shape corresponding to the material, the fitting portion integrally formed of the same material as the disk body has a rigidity required against rotation of the disk body (resisting against the idling friction force of the ratchet). The outer peripheral contour is formed in the above-mentioned polygonal shape, and the fitting part which is made of a rubber material and joined to the disk body has an outer peripheral contour of a truncated cone. (A polygonal shape is also possible depending on the degree of rigidity.) A frictional force against the idling frictional force of the ratchet is generated in a fitting hole to the fastener through a required interference. Further, the outer peripheral contour is formed in a truncated cone shape, and the insertion hole is provided at the center, and the peripheral portion is cut into the inside and outside by a dividing groove, which is used to press-fit the fitting hole into the fastener. Allows elastic deformation and resists the ratcheting frictional force by the reaction force It is such as to express the frictional force.
In addition, the engaging hole provided at the center of the disc body in the rotating means is made of the same material as the disc body in terms of material, and is formed of a rubber-based material. It is formed on an engaging portion such as a screw stop, or a peripheral edge thereof is fitted into a fitting opening opened on the board body. It is selected from a square hole or a polygonal hole fitted to the rod-shaped connecting portion to a round hole, and is structurally integral with the board and has the same depth, and is integrated with the board. Having a depth including the boss portion, a member provided inside a rubber-type ring-shaped engaging portion to be joined to the board, and a member formed in a rubber-type inverted dish shape in a longitudinal sectional view. The inner portion is provided in the joint portion, and the inner portion is formed by the inner peripheral surface of the opening of the divided piece provided on the bottom surface of the engagement portion formed in the inverted dish shape.
Further, the plurality of protruding pieces that protrude in a petal shape on the periphery of the board body have a protruding outer diameter of about 80 mm, a groove bottom arrangement diameter of about 50 mm, and eight pieces rotate with one finger. It is a convenient thing to do.
[0006]
【Example】
The turntable a as the rotating means for the ratchet type tightening tool of the present invention will be specifically described with reference to the drawings. As shown in FIG. On the periphery of the board 1 of which the required rigidity is also possible, eight long projecting pieces 2 (tip outer diameter 82 mm) are protruded in a petal shape, and each projecting piece is formed. 2, a groove bottom arrangement diameter is set to 48 mm, and a locking groove 3 for forming a groove width capable of locking one of the index finger or the thumb is continuously provided. As shown in b), a rubber-shaped elastically deformable and short fitting portion 4 having a required taper (1/12 to 1/6) and having an inverted truncated cone shape is inserted through a mounting hole 5 recessed at the center. It is joined with screws and nuts.
Also, as shown in FIG. 2, the rotary disk a may have a hexagonal column-shaped fitting portion 6 of the same material as the disk body 1 and having a required facing dimension instead of the rubber fitting portion 4 instead of the rubber fitting portion 4. Provided.
Further, as shown in FIG. 3, the turntable a is also provided as one in which an insertion hole 7 for inserting the shaft portion of the fastener is inserted through the fitting portions 4 and 6, and the rotary table a is shown in FIG. Is provided with the insertion hole 7 in the fitting portion 6 having the same material as that of the board body 1 and hanging downward and having a polygonal outline, and penetrating the board body 1 also. The one shown in FIG. 1B shows a state in which the reduced diameter portion of the rubber fitting portion 4 is fitted into a fitting opening 8 opened at the center of the board body 1, and The portion hanging down from the lower surface is a conical surface 9 for reducing the diameter as required, and the insertion hole 7 is provided through the center.
In addition, what is shown in the drawing (c) is provided radially from the center of the insertion hole 7 along the axis below the conical surface 9 of the fitting portion 4 shown in the drawing (b). A required equal dividing groove 10 is provided toward the conical surface 9.
[0007]
Next, the turntable b will be described. As shown in FIG. 4, the periphery of a 2 mm-thick hard plastic (a material having other required rigidity such as aluminum is also acceptable) is provided on the periphery of the turntable b. Eight long protruding pieces (protruding end outer diameter 82 mm) are protruded in a petal shape, and the groove bottom disposed diameter between each protruding piece 2 is 48 mm, and either the index finger or the thumb is used. A locking groove 3 is formed continuously to form a groove width capable of locking one of the holes, and an engaging hole 11 formed of a square hole having a required hole diameter penetrates the center portion as shown in FIG. The one shown in the drawing (b) is provided with an engaging hole 11 formed of a hexagonal hole having a required facing dimension, and the one shown in the drawing (c) is provided with the above-mentioned engagement. A hole 11 is provided through the lower surface of the board 1 including a boss 12 which is integrally hung. In addition, the engagement hole 11 is provided as a round hole.
The rotary disk b shown in FIG. 5 will now be described. The rotary disk b shown in FIG. 5 (a) has a planar shape shown in FIG. An elastically deformable round hole formed on the inner peripheral surface of the ring-shaped engaging portion 13, the one shown in the drawing (b) has the same planar shape as that of the drawing (a), and has an engagement hole. Numeral 11 denotes an elastically deformable round hole formed on the inner peripheral surface of a rubber-like inverted dish-shaped engaging portion 13 joined to the lower surface of the board 1.
Further, what is shown in the drawing (A) is one in which the engaging hole 11 shown in the drawing (a) is communicated with the insertion hole 7 penetrating through the center of the board 1. The one shown in (B) has the engagement hole 11 shown in (b) communicated with the insertion hole 7 provided through the board 1 from the bottom surface of the engagement part 13.
Further, the rotary disk b shown in FIG. 6 will be described. As shown in FIG. 6 (b), a rubber-made inverted dish-shaped concave portion is formed in a fitting opening 8 opened in the center of the disk body 1. The reduced diameter portion (ring groove portion having a U-shaped cross section) of the portion 13 is fitted thereinto, and as shown in FIG. In this case, the engaging holes 11 are formed in the inner peripheral surface of the concave portion and the inner peripheral surface of the opening of the divided piece 14.
[0008]
Next, the ratchet-type tightening tool A of the present invention will be described in detail with reference to the drawings. As shown in FIG. 7, a head 16 at both ends and a grip portion 17 integrating both heads 16 are provided. A rotating shaft 18 which rotates in one direction by a ratchet mechanism (not shown) is rotatably supported on each head 16, and is fitted to a central portion of the rotating shaft 18 by a fastener such as a bolt or a nut to be rotationally fastened. A ratchet-type tightening tool having a fitting hole 19 for transmitting a force penetrating therethrough and having both shaft ends protruding from the upper and lower surfaces of the head 16 as required, the side not used for tightening the required head 16 (upper side) The fitting portion 4 having the shape of an inverted truncated cone corresponding to the fitting hole 19 of the rotary disk a is removably pushed into the fitting hole 19 with a required pressing force.
Therefore, since the fitting portion 4 of the rotary disk a is pushed into the fitting hole 19 while being elastically deformed, a frictional force larger than the idling frictional force of the ratchet mechanism is developed between the two, and furthermore, each protruding piece 2 is formed. Protrudes considerably longer than the outer circumference of the head 16, either one of the index finger or thumb of the hand holding the grip 17 is locked in the locking groove 3 of the turntable a, and If one finger is hung and pulled in, the turntable a rotates correspondingly, and the turntable a rotates intermittently by pulling in the protruding piece 2 that is sequentially fed out with one finger.
As a result, the rotary shaft 18 rotates together with the turntable a due to the frictional force, so that the fastener can be extremely easily tightened in the initial tightening state, and similarly easily removed in the final stage of loosening. .
[0009]
The ratchet-type tightening tool B of the present invention will be described with reference to an embodiment. As shown in FIG. 8, each of the heads 16 is composed of heads 16 at both ends and a grip portion 17 that integrates both heads 16. A rotatable shaft 18 that rotates in one direction is supported by a ratchet mechanism (not shown), and a central portion of the rotatable shaft 18 is fitted to a fastener such as a bolt or a nut to transmit a rotational tightening force. In a ratchet-type tightening tool in which a hole 19 is penetrated and both shaft ends protrude as required from the upper and lower surfaces of the head 16, the outer periphery of the shaft end on the side (upper side) not used for tightening the required head 16 is An engaging hole 11 formed on an inner peripheral surface of a rubber-made inverted dish-shaped engaging portion 13 joined to a lower surface of the disk body 1 of the rotary disk b is pressed and fitted while being elastically deformed.
Therefore, also in the ratchet-type tightening tool B, the rotary disk b is joined to the rotary shaft 18 by the required frictional force in the engagement hole 11, so that the head 16 is not changed and two hands are not used. The initial fastening and removal of the fastener can be easily performed with one finger.
[0010]
Further, another embodiment of the ratchet type tightening tool B will be described. As shown in FIG. 9, the head 16 includes a head 16 at one end and a grip 17 integrated with the head 16. A rotation shaft 18 that rotates in one direction is supported by a ratchet mechanism (not shown), and a fitting hole for transmitting a rotation tightening force by fitting a central portion of the rotation shaft 18 to a fastener such as a bolt or a nut. In a ratchet-type fastening tool having a shaft 19 and two shaft ends projecting from the upper and lower surfaces of the head 16 as required, the above-mentioned figure is attached to the outer periphery of the shaft end on the side (upper side) not used for tightening the rotating shaft 18. 6, the recessed portion of the engaging portion 13 of the rotating disk b is fitted to the outside, and the divided piece 15 of the bottom surface 14 is pryed off by elastic deformation, and the inner peripheral surface of the opening is formed as the engaging hole 11 so that a required frictional force is developed. And joined.
Therefore, the rotating shaft 18 rotates together with the rotation of the turntable b via the frictional force, and as shown in FIG. (By operating the thumb outside the figure).
[0011]
The ratchet-type tightening tool c shown in FIG. 10 will be described. The head 16 includes one end portion 16 and a grip portion 17 integrated with the head portion 16, and the head portion 16 is provided in one direction by a ratchet mechanism (not shown). The rotating shaft 18 is rotatably supported, and the lower shaft end of the rotating shaft 18 is suspended as a square shaft 20. A cylindrical socket 21 is fitted on the square shaft 20, and a fastener is provided below the socket 21. In the ratchet-type tightening tool having a fitting hole 19 formed therein, the recess of the engaging portion 13 of the turntable b shown in FIG. The piece 15 is pryed open, and the inner peripheral surface of the opening is formed as an engagement hole 11 so that a required frictional force (frictional force larger than the idling frictional force) is developed and joined.
In this case, the turntable b is located below the head 16. However, as shown in FIG. Since there is the board 1 disposed, there is no problem in using one of the index finger and the thumb with the grip portion 17 held.
In the case of the initial tightening of the fastener, if the screw is a right-hand screw, by switching the ratchet mechanism, the clockwise rotation of the gripper 17 is transmitted as a rotational tightening force, and the left rotation is operated as an idle rotation accompanied by an idling friction force. However, at this time, the rotating shaft 18 involved in the connection to the fastener is free to rotate right, so if the person is right-handed, the projecting piece 2 of the turntable b is pulled in with the index finger of the right hand to rotate the rotating shaft 18 clockwise. Then, the initial tightening is promptly processed, and the final tightening by the gripping portion 17 is started from the point of time when the rotating disk b slips. At the end of the loosening, the left rotation of the gripping portion 17 becomes the rotational force transmission by switching the ratchet mechanism. Since the shaft 18 is free to rotate left, the protrusion 2 can be pulled in with the thumb of the right hand, and the rotating shaft 18 can be rotated counterclockwise to quickly remove the fastener. If a left-handed person uses the index finger and the thumb under the same fastener condition, the thumb is used for the right rotation at the time of the initial tightening, and the left rotation is performed with the forefinger at the end of the loosening.
In addition, in the case where a fitting hole 19 for a fastener of a required size is communicated from above and below with a rotating shaft 18 which is supported by a head 16 via a ratchet mechanism (not shown), the shaft portion of the bolt is used. Since the nut protruding upward can be tightened or loosened, in such a case, the nut is engaged with the engaging portion 13 as shown in FIGS. 5A and 5B. A ratchet-type tightening tool equipped with a turntable b having an insertion hole 7 through which the shaft portion can be inserted together with the panel body 1, or a ratchet-type tightening tool for joining a socket 21 to a square shaft 20 depending on a rotary shaft 18. In this case, a ratchet-type tightening tool or the like in which the turntable b shown in FIG. 4A is fitted to the square shaft 20 between the socket 21 and the lower surface of the head can also be provided.
In short, the rotating disks a and b, which can be rotated by one of the index finger and the thumb, are connected to the shaft end (round shaft, square shaft, other polygon shaft, etc.) of the rotating shaft 18 of the conventional ratchet type tightening tool. Shaft end), fits or press-fits into a fitting hole 19 to a fastener provided at the center of the rotating shaft 18, or fits into a socket 21 joined to the rotating shaft 18. A ratchet-type fastening tool fitted and joined is intended to be provided in the present invention, and what is shown in this embodiment is merely an example. Further, in the rotating disk of the present invention, the fitting portions 4, 6 and the engagement holes 11 are provided in various specifications corresponding to the respective capabilities of the conventionally provided ratchet-type tightening tool. It can be used in response to the existing tool, and is extremely useful in practice. In addition, a structure in which the rotating disk b is integrally joined to the socket 21 can be easily conceived from the present invention.
[0012]
【The invention's effect】
As described above, according to the present invention, in the rotating disk, since it is provided corresponding to the specifications such as the outer diameter or the inner diameter of the shaft end of the rotating shaft of the conventional ratchet type fastening tool, the existing tool In addition to being able to be used immediately, one of the index finger or the thumb is locked in the locking groove between the protruding pieces and the protruding piece can be rotated while sequentially pulling in the protruding piece with one finger. The initial tightening of the fasteners is simple and reliable, which contributes extremely practically to the removal.In addition, in the ratchet type tightening tool equipped with the rotating disk, without changing the hand holding the grip portion, Since the fastener can be initially tightened and disengaged with one finger while holding it, the work efficiency is also particularly improved.
[Brief description of the drawings]
1A and 1B are explanatory views of a rotating disk a of the present invention, wherein FIG. 1A is a plan view thereof, and FIG. 1B is a cross-sectional view of FIG.
FIG. 2 is a perspective view showing another embodiment of the turntable a, with the top and bottom reversed.
FIG. 3 shows still another embodiment of the rotary disc a, and FIG. 3A is a longitudinal cross-sectional view of the disc body 1 and the fitting portion 6 integrally formed with a through hole 7 at the center thereof. (b) is a longitudinal sectional view of the fitting portion 4 joined to the board 1 and the insertion hole 7 is provided at the center, and (c) is provided with a dividing groove 10 in the fitting portion 4 in (b). It was done.
FIGS. 4A and 4B are explanatory views of a rotating disk b of the present invention, wherein FIGS. 4A and 4B are plan views of the rotating disk b, and FIG. is there.
5A and 5B are explanatory views showing another embodiment of the rotary disk b, wherein FIGS. 5A and 5B are longitudinal sectional views, and FIGS. 5A and 5B are FIGS. ) Through which an insertion hole 7 is provided.
FIGS. 6A and 6B are explanatory views showing still another embodiment of the rotary disk b, wherein FIG. 6A is a plan view thereof and FIG. 6B is a longitudinal sectional view thereof.
FIGS. 7A and 7B are explanatory views of the ratchet type fastening tool A of the present invention, wherein FIG. 7A is a plan view thereof, and FIG. 7B is a front view of FIG.
FIG. 8 is an explanatory view of a ratchet type tightening tool B of the present invention, wherein (a) is a plan view thereof, and (b) is a front view of (a).
9A and 9B are explanatory views of another embodiment of the ratchet type tightening tool B, wherein FIG. 9A is a plan view, FIG. 9B is a front view of FIG. 9A, and FIG. It is a top view of a use state.
FIG. 10 is an explanatory view of the ratchet type tightening tool c, (a) is a plan view thereof, and (b) is a front view of (a).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Board body 2 Projecting piece 3 Locking groove 4 Fitting part 5 Mounting hole 6 Fitting part 7 Inserting hole 8 Fitting opening 9 Conical surface 10 Dividing groove 11 Engaging hole 12 Boss 13 Engaging part 14 Bottom 15 Splitting piece Reference Signs List 16 Head 17 Gripping part 18 Rotary shaft 19 Fitting hole 20 Square shaft 21 Sockets a and b, Turntables A to C Ratchet type tightening tool